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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
7df302f7 | 41 | #include <linux/ratelimit.h> |
68e76ad0 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
5976687a | 43 | #include <linux/sunrpc/addr.h> |
87545899 | 44 | #include <linux/jhash.h> |
169319f1 | 45 | #include <linux/string_helpers.h> |
472d155a | 46 | #include <linux/fsnotify.h> |
f4e44b39 | 47 | #include <linux/nfs_ssc.h> |
9a74af21 | 48 | #include "xdr4.h" |
06b332a5 | 49 | #include "xdr4cb.h" |
0a3adade | 50 | #include "vfs.h" |
bfa4b365 | 51 | #include "current_stateid.h" |
1da177e4 | 52 | |
5e1533c7 | 53 | #include "netns.h" |
9cf514cc | 54 | #include "pnfs.h" |
fd4f83fd | 55 | #include "filecache.h" |
dd5e3fbc | 56 | #include "trace.h" |
5e1533c7 | 57 | |
1da177e4 LT |
58 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
59 | ||
f32f3c2d BF |
60 | #define all_ones {{~0,~0},~0} |
61 | static const stateid_t one_stateid = { | |
62 | .si_generation = ~0, | |
63 | .si_opaque = all_ones, | |
64 | }; | |
65 | static const stateid_t zero_stateid = { | |
66 | /* all fields zero */ | |
67 | }; | |
19ff0f28 TM |
68 | static const stateid_t currentstateid = { |
69 | .si_generation = 1, | |
70 | }; | |
fb500a7c TM |
71 | static const stateid_t close_stateid = { |
72 | .si_generation = 0xffffffffU, | |
73 | }; | |
f32f3c2d | 74 | |
ec6b5d7b | 75 | static u64 current_sessionid = 1; |
fd39ca9a | 76 | |
f32f3c2d BF |
77 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
78 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 79 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 80 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 81 | |
1da177e4 | 82 | /* forward declarations */ |
f9c00c3a | 83 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 84 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
362063a5 | 85 | void nfsd4_end_grace(struct nfsd_net *nn); |
624322f1 | 86 | static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); |
1da177e4 | 87 | |
8b671b80 BF |
88 | /* Locking: */ |
89 | ||
8b671b80 BF |
90 | /* |
91 | * Currently used for the del_recall_lru and file hash table. In an | |
92 | * effort to decrease the scope of the client_mutex, this spinlock may | |
93 | * eventually cover more: | |
94 | */ | |
cdc97505 | 95 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 96 | |
4f34bd05 AE |
97 | enum nfsd4_st_mutex_lock_subclass { |
98 | OPEN_STATEID_MUTEX = 0, | |
99 | LOCK_STATEID_MUTEX = 1, | |
100 | }; | |
101 | ||
b401be22 JL |
102 | /* |
103 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
104 | * the refcount on the open stateid to drop. | |
105 | */ | |
106 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
107 | ||
89c905be BF |
108 | /* |
109 | * A waitqueue where a writer to clients/#/ctl destroying a client can | |
110 | * wait for cl_rpc_users to drop to 0 and then for the client to be | |
111 | * unhashed. | |
112 | */ | |
113 | static DECLARE_WAIT_QUEUE_HEAD(expiry_wq); | |
114 | ||
9258a2d5 | 115 | static struct kmem_cache *client_slab; |
abf1135b CH |
116 | static struct kmem_cache *openowner_slab; |
117 | static struct kmem_cache *lockowner_slab; | |
118 | static struct kmem_cache *file_slab; | |
119 | static struct kmem_cache *stateid_slab; | |
120 | static struct kmem_cache *deleg_slab; | |
8287f009 | 121 | static struct kmem_cache *odstate_slab; |
e60d4398 | 122 | |
66b2b9b2 | 123 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 124 | |
c4cb8974 | 125 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 126 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 127 | |
66af2579 DN |
128 | static struct workqueue_struct *laundry_wq; |
129 | ||
d76cc46b DN |
130 | int nfsd4_create_laundry_wq(void) |
131 | { | |
132 | int rc = 0; | |
133 | ||
134 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); | |
135 | if (laundry_wq == NULL) | |
136 | rc = -ENOMEM; | |
137 | return rc; | |
138 | } | |
139 | ||
140 | void nfsd4_destroy_laundry_wq(void) | |
141 | { | |
142 | destroy_workqueue(laundry_wq); | |
143 | } | |
144 | ||
f0f51f5c | 145 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 146 | { |
f0f51f5c | 147 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
148 | } |
149 | ||
f0f51f5c | 150 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 151 | { |
f0f51f5c | 152 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
153 | return nfserr_jukebox; |
154 | ses->se_flags |= NFS4_SESSION_DEAD; | |
155 | return nfs_ok; | |
508dc6e1 BH |
156 | } |
157 | ||
221a6876 BF |
158 | static bool is_client_expired(struct nfs4_client *clp) |
159 | { | |
160 | return clp->cl_time == 0; | |
161 | } | |
162 | ||
221a6876 BF |
163 | static __be32 get_client_locked(struct nfs4_client *clp) |
164 | { | |
0a880a28 TM |
165 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
166 | ||
167 | lockdep_assert_held(&nn->client_lock); | |
168 | ||
221a6876 BF |
169 | if (is_client_expired(clp)) |
170 | return nfserr_expired; | |
14ed14cc | 171 | atomic_inc(&clp->cl_rpc_users); |
66af2579 | 172 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
173 | return nfs_ok; |
174 | } | |
175 | ||
176 | /* must be called under the client_lock */ | |
177 | static inline void | |
178 | renew_client_locked(struct nfs4_client *clp) | |
179 | { | |
180 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
181 | ||
182 | if (is_client_expired(clp)) { | |
183 | WARN_ON(1); | |
184 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
185 | __func__, | |
186 | clp->cl_clientid.cl_boot, | |
187 | clp->cl_clientid.cl_id); | |
188 | return; | |
189 | } | |
190 | ||
221a6876 | 191 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
20b7d86f | 192 | clp->cl_time = ktime_get_boottime_seconds(); |
66af2579 | 193 | clp->cl_state = NFSD4_ACTIVE; |
221a6876 BF |
194 | } |
195 | ||
ba138435 | 196 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 197 | { |
0a880a28 TM |
198 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
199 | ||
200 | lockdep_assert_held(&nn->client_lock); | |
201 | ||
14ed14cc | 202 | if (!atomic_dec_and_test(&clp->cl_rpc_users)) |
221a6876 BF |
203 | return; |
204 | if (!is_client_expired(clp)) | |
205 | renew_client_locked(clp); | |
89c905be BF |
206 | else |
207 | wake_up_all(&expiry_wq); | |
221a6876 BF |
208 | } |
209 | ||
4b24ca7d JL |
210 | static void put_client_renew(struct nfs4_client *clp) |
211 | { | |
212 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
213 | ||
14ed14cc | 214 | if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) |
d6c249b4 JL |
215 | return; |
216 | if (!is_client_expired(clp)) | |
217 | renew_client_locked(clp); | |
89c905be BF |
218 | else |
219 | wake_up_all(&expiry_wq); | |
4b24ca7d JL |
220 | spin_unlock(&nn->client_lock); |
221 | } | |
222 | ||
d4e19e70 TM |
223 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
224 | { | |
225 | __be32 status; | |
226 | ||
227 | if (is_session_dead(ses)) | |
228 | return nfserr_badsession; | |
229 | status = get_client_locked(ses->se_client); | |
230 | if (status) | |
231 | return status; | |
232 | atomic_inc(&ses->se_ref); | |
233 | return nfs_ok; | |
234 | } | |
235 | ||
236 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
237 | { | |
238 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
239 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
240 | ||
241 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
242 | |
243 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
244 | free_session(ses); | |
245 | put_client_renew_locked(clp); | |
246 | } | |
247 | ||
248 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
249 | { | |
250 | struct nfs4_client *clp = ses->se_client; | |
251 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
252 | ||
253 | spin_lock(&nn->client_lock); | |
254 | nfsd4_put_session_locked(ses); | |
255 | spin_unlock(&nn->client_lock); | |
256 | } | |
257 | ||
76d348fa JL |
258 | static struct nfsd4_blocked_lock * |
259 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
260 | struct nfsd_net *nn) | |
261 | { | |
262 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
263 | ||
0cc11a61 | 264 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
265 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
266 | if (fh_match(fh, &cur->nbl_fh)) { | |
267 | list_del_init(&cur->nbl_list); | |
47446d74 | 268 | WARN_ON(list_empty(&cur->nbl_lru)); |
7919d0a2 | 269 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
270 | found = cur; |
271 | break; | |
272 | } | |
273 | } | |
0cc11a61 | 274 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 275 | if (found) |
cb03f94f | 276 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
277 | return found; |
278 | } | |
279 | ||
280 | static struct nfsd4_blocked_lock * | |
281 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
282 | struct nfsd_net *nn) | |
283 | { | |
284 | struct nfsd4_blocked_lock *nbl; | |
285 | ||
286 | nbl = find_blocked_lock(lo, fh, nn); | |
287 | if (!nbl) { | |
288 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
289 | if (nbl) { | |
e1e8399e VA |
290 | INIT_LIST_HEAD(&nbl->nbl_list); |
291 | INIT_LIST_HEAD(&nbl->nbl_lru); | |
76d348fa JL |
292 | fh_copy_shallow(&nbl->nbl_fh, fh); |
293 | locks_init_lock(&nbl->nbl_lock); | |
47446d74 | 294 | kref_init(&nbl->nbl_kref); |
76d348fa JL |
295 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, |
296 | &nfsd4_cb_notify_lock_ops, | |
297 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
298 | } | |
299 | } | |
300 | return nbl; | |
301 | } | |
302 | ||
47446d74 VA |
303 | static void |
304 | free_nbl(struct kref *kref) | |
305 | { | |
306 | struct nfsd4_blocked_lock *nbl; | |
307 | ||
308 | nbl = container_of(kref, struct nfsd4_blocked_lock, nbl_kref); | |
309 | kfree(nbl); | |
310 | } | |
311 | ||
76d348fa JL |
312 | static void |
313 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
314 | { | |
6aaafc43 | 315 | locks_delete_block(&nbl->nbl_lock); |
76d348fa | 316 | locks_release_private(&nbl->nbl_lock); |
47446d74 | 317 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa JL |
318 | } |
319 | ||
68ef3bc3 JL |
320 | static void |
321 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
322 | { | |
323 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
324 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
325 | struct nfsd4_blocked_lock *nbl; | |
326 | LIST_HEAD(reaplist); | |
327 | ||
328 | /* Dequeue all blocked locks */ | |
329 | spin_lock(&nn->blocked_locks_lock); | |
330 | while (!list_empty(&lo->lo_blocked)) { | |
331 | nbl = list_first_entry(&lo->lo_blocked, | |
332 | struct nfsd4_blocked_lock, | |
333 | nbl_list); | |
334 | list_del_init(&nbl->nbl_list); | |
47446d74 | 335 | WARN_ON(list_empty(&nbl->nbl_lru)); |
68ef3bc3 JL |
336 | list_move(&nbl->nbl_lru, &reaplist); |
337 | } | |
338 | spin_unlock(&nn->blocked_locks_lock); | |
339 | ||
340 | /* Now free them */ | |
341 | while (!list_empty(&reaplist)) { | |
342 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
343 | nbl_lru); | |
344 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
345 | free_blocked_lock(nbl); |
346 | } | |
347 | } | |
348 | ||
f456458e JL |
349 | static void |
350 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
351 | { | |
352 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
353 | struct nfsd4_blocked_lock, nbl_cb); | |
354 | locks_delete_block(&nbl->nbl_lock); | |
355 | } | |
356 | ||
76d348fa JL |
357 | static int |
358 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
359 | { | |
360 | /* | |
361 | * Since this is just an optimization, we don't try very hard if it | |
362 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
363 | * just quit trying on anything else. | |
364 | */ | |
365 | switch (task->tk_status) { | |
366 | case -NFS4ERR_DELAY: | |
367 | rpc_delay(task, 1 * HZ); | |
368 | return 0; | |
369 | default: | |
370 | return 1; | |
371 | } | |
372 | } | |
373 | ||
374 | static void | |
375 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
376 | { | |
377 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
378 | struct nfsd4_blocked_lock, nbl_cb); | |
379 | ||
380 | free_blocked_lock(nbl); | |
381 | } | |
382 | ||
383 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 384 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
385 | .done = nfsd4_cb_notify_lock_done, |
386 | .release = nfsd4_cb_notify_lock_release, | |
387 | }; | |
388 | ||
ebd9d2c2 BF |
389 | /* |
390 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
391 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
392 | * only what share bits are currently in force, but also what | |
393 | * combinations of share bits previous opens have used. This allows us | |
3dcd1d8a BF |
394 | * to enforce the recommendation in |
395 | * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that | |
396 | * the server return an error if the client attempt to downgrade to a | |
397 | * combination of share bits not explicable by closing some of its | |
398 | * previous opens. | |
ebd9d2c2 | 399 | * |
3dcd1d8a | 400 | * This enforcement is arguably incomplete, since we don't keep |
ebd9d2c2 BF |
401 | * track of access/deny bit combinations; so, e.g., we allow: |
402 | * | |
403 | * OPEN allow read, deny write | |
404 | * OPEN allow both, deny none | |
405 | * DOWNGRADE allow read, deny none | |
406 | * | |
407 | * which we should reject. | |
3dcd1d8a BF |
408 | * |
409 | * But you could also argue that our current code is already overkill, | |
410 | * since it only exists to return NFS4ERR_INVAL on incorrect client | |
411 | * behavior. | |
ebd9d2c2 BF |
412 | */ |
413 | static unsigned int | |
414 | bmap_to_share_mode(unsigned long bmap) | |
415 | { | |
416 | int i; | |
417 | unsigned int access = 0; | |
418 | ||
419 | for (i = 1; i < 4; i++) { | |
420 | if (test_bit(i, &bmap)) | |
421 | access |= i; | |
422 | } | |
423 | return access; | |
424 | } | |
425 | ||
426 | /* set share access for a given stateid */ | |
427 | static inline void | |
428 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
429 | { | |
430 | unsigned char mask = 1 << access; | |
431 | ||
432 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
433 | stp->st_access_bmap |= mask; | |
434 | } | |
435 | ||
436 | /* clear share access for a given stateid */ | |
437 | static inline void | |
438 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
439 | { | |
440 | unsigned char mask = 1 << access; | |
441 | ||
442 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
443 | stp->st_access_bmap &= ~mask; | |
444 | } | |
445 | ||
446 | /* test whether a given stateid has access */ | |
447 | static inline bool | |
448 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
449 | { | |
450 | unsigned char mask = 1 << access; | |
451 | ||
452 | return (bool)(stp->st_access_bmap & mask); | |
453 | } | |
454 | ||
455 | /* set share deny for a given stateid */ | |
456 | static inline void | |
457 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
458 | { | |
459 | unsigned char mask = 1 << deny; | |
460 | ||
461 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
462 | stp->st_deny_bmap |= mask; | |
463 | } | |
464 | ||
465 | /* clear share deny for a given stateid */ | |
466 | static inline void | |
467 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
468 | { | |
469 | unsigned char mask = 1 << deny; | |
470 | ||
471 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
472 | stp->st_deny_bmap &= ~mask; | |
473 | } | |
474 | ||
475 | /* test whether a given stateid is denying specific access */ | |
476 | static inline bool | |
477 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
478 | { | |
479 | unsigned char mask = 1 << deny; | |
480 | ||
481 | return (bool)(stp->st_deny_bmap & mask); | |
482 | } | |
483 | ||
484 | static int nfs4_access_to_omode(u32 access) | |
485 | { | |
486 | switch (access & NFS4_SHARE_ACCESS_BOTH) { | |
487 | case NFS4_SHARE_ACCESS_READ: | |
488 | return O_RDONLY; | |
489 | case NFS4_SHARE_ACCESS_WRITE: | |
490 | return O_WRONLY; | |
491 | case NFS4_SHARE_ACCESS_BOTH: | |
492 | return O_RDWR; | |
493 | } | |
494 | WARN_ON_ONCE(1); | |
495 | return O_RDONLY; | |
496 | } | |
497 | ||
498 | static inline int | |
499 | access_permit_read(struct nfs4_ol_stateid *stp) | |
500 | { | |
501 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || | |
502 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
503 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
504 | } | |
505 | ||
506 | static inline int | |
507 | access_permit_write(struct nfs4_ol_stateid *stp) | |
508 | { | |
509 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || | |
510 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
511 | } | |
512 | ||
b5971afa KM |
513 | static inline struct nfs4_stateowner * |
514 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
515 | { | |
516 | atomic_inc(&sop->so_count); | |
517 | return sop; | |
518 | } | |
519 | ||
7ffb5880 | 520 | static int |
d4f0489f | 521 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
522 | { |
523 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 524 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
525 | } |
526 | ||
527 | static struct nfs4_openowner * | |
528 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 529 | struct nfs4_client *clp) |
7ffb5880 TM |
530 | { |
531 | struct nfs4_stateowner *so; | |
7ffb5880 | 532 | |
d4f0489f | 533 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 534 | |
d4f0489f TM |
535 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
536 | so_strhash) { | |
7ffb5880 TM |
537 | if (!so->so_is_open_owner) |
538 | continue; | |
b5971afa KM |
539 | if (same_owner_str(so, &open->op_owner)) |
540 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
541 | } |
542 | return NULL; | |
543 | } | |
544 | ||
545 | static struct nfs4_openowner * | |
546 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 547 | struct nfs4_client *clp) |
7ffb5880 TM |
548 | { |
549 | struct nfs4_openowner *oo; | |
550 | ||
d4f0489f TM |
551 | spin_lock(&clp->cl_lock); |
552 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
553 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
554 | return oo; |
555 | } | |
556 | ||
1da177e4 LT |
557 | static inline u32 |
558 | opaque_hashval(const void *ptr, int nbytes) | |
559 | { | |
560 | unsigned char *cptr = (unsigned char *) ptr; | |
561 | ||
562 | u32 x = 0; | |
563 | while (nbytes--) { | |
564 | x *= 37; | |
565 | x += *cptr++; | |
566 | } | |
567 | return x; | |
568 | } | |
569 | ||
5b095e99 | 570 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 571 | { |
5b095e99 JL |
572 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
573 | ||
574 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
575 | } |
576 | ||
e6ba76e1 | 577 | void |
13cd2184 N |
578 | put_nfs4_file(struct nfs4_file *fi) |
579 | { | |
02e1215f JL |
580 | might_lock(&state_lock); |
581 | ||
818a34eb | 582 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 583 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 584 | spin_unlock(&state_lock); |
8287f009 | 585 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
586 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
587 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 588 | } |
13cd2184 N |
589 | } |
590 | ||
eb82dd39 | 591 | static struct nfsd_file * |
de18643d TM |
592 | __nfs4_get_fd(struct nfs4_file *f, int oflag) |
593 | { | |
594 | if (f->fi_fds[oflag]) | |
eb82dd39 | 595 | return nfsd_file_get(f->fi_fds[oflag]); |
de18643d TM |
596 | return NULL; |
597 | } | |
598 | ||
eb82dd39 | 599 | static struct nfsd_file * |
de18643d TM |
600 | find_writeable_file_locked(struct nfs4_file *f) |
601 | { | |
eb82dd39 | 602 | struct nfsd_file *ret; |
de18643d TM |
603 | |
604 | lockdep_assert_held(&f->fi_lock); | |
605 | ||
606 | ret = __nfs4_get_fd(f, O_WRONLY); | |
607 | if (!ret) | |
608 | ret = __nfs4_get_fd(f, O_RDWR); | |
609 | return ret; | |
610 | } | |
611 | ||
eb82dd39 | 612 | static struct nfsd_file * |
de18643d TM |
613 | find_writeable_file(struct nfs4_file *f) |
614 | { | |
eb82dd39 | 615 | struct nfsd_file *ret; |
de18643d TM |
616 | |
617 | spin_lock(&f->fi_lock); | |
618 | ret = find_writeable_file_locked(f); | |
619 | spin_unlock(&f->fi_lock); | |
620 | ||
621 | return ret; | |
622 | } | |
623 | ||
eb82dd39 JL |
624 | static struct nfsd_file * |
625 | find_readable_file_locked(struct nfs4_file *f) | |
de18643d | 626 | { |
eb82dd39 | 627 | struct nfsd_file *ret; |
de18643d TM |
628 | |
629 | lockdep_assert_held(&f->fi_lock); | |
630 | ||
631 | ret = __nfs4_get_fd(f, O_RDONLY); | |
632 | if (!ret) | |
633 | ret = __nfs4_get_fd(f, O_RDWR); | |
634 | return ret; | |
635 | } | |
636 | ||
eb82dd39 | 637 | static struct nfsd_file * |
de18643d TM |
638 | find_readable_file(struct nfs4_file *f) |
639 | { | |
eb82dd39 | 640 | struct nfsd_file *ret; |
de18643d TM |
641 | |
642 | spin_lock(&f->fi_lock); | |
643 | ret = find_readable_file_locked(f); | |
644 | spin_unlock(&f->fi_lock); | |
645 | ||
646 | return ret; | |
647 | } | |
648 | ||
eb82dd39 | 649 | struct nfsd_file * |
de18643d TM |
650 | find_any_file(struct nfs4_file *f) |
651 | { | |
eb82dd39 | 652 | struct nfsd_file *ret; |
de18643d | 653 | |
a451b123 TM |
654 | if (!f) |
655 | return NULL; | |
de18643d TM |
656 | spin_lock(&f->fi_lock); |
657 | ret = __nfs4_get_fd(f, O_RDWR); | |
658 | if (!ret) { | |
659 | ret = __nfs4_get_fd(f, O_WRONLY); | |
660 | if (!ret) | |
661 | ret = __nfs4_get_fd(f, O_RDONLY); | |
662 | } | |
663 | spin_unlock(&f->fi_lock); | |
664 | return ret; | |
665 | } | |
666 | ||
9affa435 BF |
667 | static struct nfsd_file *find_deleg_file(struct nfs4_file *f) |
668 | { | |
669 | struct nfsd_file *ret = NULL; | |
670 | ||
671 | spin_lock(&f->fi_lock); | |
672 | if (f->fi_deleg_file) | |
673 | ret = nfsd_file_get(f->fi_deleg_file); | |
674 | spin_unlock(&f->fi_lock); | |
675 | return ret; | |
676 | } | |
677 | ||
02a3508d | 678 | static atomic_long_t num_delegations; |
697ce9be | 679 | unsigned long max_delegations; |
ef0f3390 N |
680 | |
681 | /* | |
682 | * Open owner state (share locks) | |
683 | */ | |
684 | ||
16bfdaaf BF |
685 | /* hash tables for lock and open owners */ |
686 | #define OWNER_HASH_BITS 8 | |
687 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
688 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 689 | |
d4f0489f | 690 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
691 | { |
692 | unsigned int ret; | |
693 | ||
694 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 695 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 696 | } |
ef0f3390 | 697 | |
ef0f3390 N |
698 | /* hash table for nfs4_file */ |
699 | #define FILE_HASH_BITS 8 | |
700 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 701 | |
f9b60e22 | 702 | static unsigned int file_hashval(struct svc_fh *fh) |
ddc04c41 | 703 | { |
f9b60e22 | 704 | struct inode *inode = d_inode(fh->fh_dentry); |
ca943217 | 705 | |
f9b60e22 BF |
706 | /* XXX: why not (here & in file cache) use inode? */ |
707 | return (unsigned int)hash_long(inode->i_ino, FILE_HASH_BITS); | |
ca943217 TM |
708 | } |
709 | ||
89876f8c | 710 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 711 | |
3d694271 DN |
712 | /* |
713 | * Check if courtesy clients have conflicting access and resolve it if possible | |
714 | * | |
715 | * access: is op_share_access if share_access is true. | |
716 | * Check if access mode, op_share_access, would conflict with | |
717 | * the current deny mode of the file 'fp'. | |
718 | * access: is op_share_deny if share_access is false. | |
719 | * Check if the deny mode, op_share_deny, would conflict with | |
720 | * current access of the file 'fp'. | |
721 | * stp: skip checking this entry. | |
722 | * new_stp: normal open, not open upgrade. | |
723 | * | |
724 | * Function returns: | |
725 | * false - access/deny mode conflict with normal client. | |
726 | * true - no conflict or conflict with courtesy client(s) is resolved. | |
727 | */ | |
728 | static bool | |
729 | nfs4_resolve_deny_conflicts_locked(struct nfs4_file *fp, bool new_stp, | |
730 | struct nfs4_ol_stateid *stp, u32 access, bool share_access) | |
731 | { | |
732 | struct nfs4_ol_stateid *st; | |
733 | bool resolvable = true; | |
734 | unsigned char bmap; | |
735 | struct nfsd_net *nn; | |
736 | struct nfs4_client *clp; | |
737 | ||
738 | lockdep_assert_held(&fp->fi_lock); | |
739 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
740 | /* ignore lock stateid */ | |
741 | if (st->st_openstp) | |
742 | continue; | |
743 | if (st == stp && new_stp) | |
744 | continue; | |
745 | /* check file access against deny mode or vice versa */ | |
746 | bmap = share_access ? st->st_deny_bmap : st->st_access_bmap; | |
747 | if (!(access & bmap_to_share_mode(bmap))) | |
748 | continue; | |
749 | clp = st->st_stid.sc_client; | |
750 | if (try_to_expire_client(clp)) | |
751 | continue; | |
752 | resolvable = false; | |
753 | break; | |
754 | } | |
755 | if (resolvable) { | |
756 | clp = stp->st_stid.sc_client; | |
757 | nn = net_generic(clp->net, nfsd_net_id); | |
758 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
759 | } | |
760 | return resolvable; | |
761 | } | |
762 | ||
12659651 JL |
763 | static void |
764 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 765 | { |
7214e860 JL |
766 | lockdep_assert_held(&fp->fi_lock); |
767 | ||
12659651 JL |
768 | if (access & NFS4_SHARE_ACCESS_WRITE) |
769 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
770 | if (access & NFS4_SHARE_ACCESS_READ) | |
771 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
772 | } |
773 | ||
12659651 JL |
774 | static __be32 |
775 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 776 | { |
7214e860 JL |
777 | lockdep_assert_held(&fp->fi_lock); |
778 | ||
12659651 JL |
779 | /* Does this access mode make sense? */ |
780 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
781 | return nfserr_inval; | |
782 | ||
baeb4ff0 JL |
783 | /* Does it conflict with a deny mode already set? */ |
784 | if ((access & fp->fi_share_deny) != 0) | |
785 | return nfserr_share_denied; | |
786 | ||
12659651 JL |
787 | __nfs4_file_get_access(fp, access); |
788 | return nfs_ok; | |
998db52c BF |
789 | } |
790 | ||
baeb4ff0 JL |
791 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
792 | { | |
793 | /* Common case is that there is no deny mode. */ | |
794 | if (deny) { | |
795 | /* Does this deny mode make sense? */ | |
796 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
797 | return nfserr_inval; | |
798 | ||
799 | if ((deny & NFS4_SHARE_DENY_READ) && | |
800 | atomic_read(&fp->fi_access[O_RDONLY])) | |
801 | return nfserr_share_denied; | |
802 | ||
803 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
804 | atomic_read(&fp->fi_access[O_WRONLY])) | |
805 | return nfserr_share_denied; | |
806 | } | |
807 | return nfs_ok; | |
808 | } | |
809 | ||
998db52c | 810 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 811 | { |
de18643d TM |
812 | might_lock(&fp->fi_lock); |
813 | ||
814 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
fd4f83fd JL |
815 | struct nfsd_file *f1 = NULL; |
816 | struct nfsd_file *f2 = NULL; | |
de18643d | 817 | |
6d338b51 | 818 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 819 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 820 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
821 | spin_unlock(&fp->fi_lock); |
822 | if (f1) | |
5e138c4a | 823 | nfsd_file_close(f1); |
de18643d | 824 | if (f2) |
5e138c4a | 825 | nfsd_file_close(f2); |
f9d7562f BF |
826 | } |
827 | } | |
828 | ||
12659651 | 829 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 830 | { |
12659651 JL |
831 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
832 | ||
833 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 834 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
835 | if (access & NFS4_SHARE_ACCESS_READ) |
836 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
837 | } |
838 | ||
8287f009 SB |
839 | /* |
840 | * Allocate a new open/delegation state counter. This is needed for | |
841 | * pNFS for proper return on close semantics. | |
842 | * | |
843 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
844 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
845 | */ | |
846 | static struct nfs4_clnt_odstate * | |
847 | alloc_clnt_odstate(struct nfs4_client *clp) | |
848 | { | |
849 | struct nfs4_clnt_odstate *co; | |
850 | ||
851 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
852 | if (co) { | |
853 | co->co_client = clp; | |
cff7cb2e | 854 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
855 | } |
856 | return co; | |
857 | } | |
858 | ||
859 | static void | |
860 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
861 | { | |
862 | struct nfs4_file *fp = co->co_file; | |
863 | ||
864 | lockdep_assert_held(&fp->fi_lock); | |
865 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
866 | } | |
867 | ||
868 | static inline void | |
869 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
870 | { | |
871 | if (co) | |
cff7cb2e | 872 | refcount_inc(&co->co_odcount); |
8287f009 SB |
873 | } |
874 | ||
875 | static void | |
876 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
877 | { | |
878 | struct nfs4_file *fp; | |
879 | ||
880 | if (!co) | |
881 | return; | |
882 | ||
883 | fp = co->co_file; | |
cff7cb2e | 884 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
885 | list_del(&co->co_perfile); |
886 | spin_unlock(&fp->fi_lock); | |
887 | ||
888 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
889 | kmem_cache_free(odstate_slab, co); | |
890 | } | |
891 | } | |
892 | ||
893 | static struct nfs4_clnt_odstate * | |
894 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
895 | { | |
896 | struct nfs4_clnt_odstate *co; | |
897 | struct nfs4_client *cl; | |
898 | ||
899 | if (!new) | |
900 | return NULL; | |
901 | ||
902 | cl = new->co_client; | |
903 | ||
904 | spin_lock(&fp->fi_lock); | |
905 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
906 | if (co->co_client == cl) { | |
907 | get_clnt_odstate(co); | |
908 | goto out; | |
909 | } | |
910 | } | |
911 | co = new; | |
912 | co->co_file = fp; | |
913 | hash_clnt_odstate_locked(new); | |
914 | out: | |
915 | spin_unlock(&fp->fi_lock); | |
916 | return co; | |
917 | } | |
918 | ||
d19fb70d KM |
919 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
920 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 921 | { |
3abdb607 | 922 | struct nfs4_stid *stid; |
6136d2b4 | 923 | int new_id; |
2a74aba7 | 924 | |
f8338834 | 925 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
926 | if (!stid) |
927 | return NULL; | |
928 | ||
4770d722 JL |
929 | idr_preload(GFP_KERNEL); |
930 | spin_lock(&cl->cl_lock); | |
78599c42 BF |
931 | /* Reserving 0 for start of file in nfsdfs "states" file: */ |
932 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); | |
4770d722 JL |
933 | spin_unlock(&cl->cl_lock); |
934 | idr_preload_end(); | |
ebd6c707 | 935 | if (new_id < 0) |
3abdb607 | 936 | goto out_free; |
d19fb70d KM |
937 | |
938 | stid->sc_free = sc_free; | |
2a74aba7 | 939 | stid->sc_client = cl; |
3abdb607 BF |
940 | stid->sc_stateid.si_opaque.so_id = new_id; |
941 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 942 | /* Will be incremented before return to client: */ |
a15dfcd5 | 943 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 944 | spin_lock_init(&stid->sc_lock); |
624322f1 | 945 | INIT_LIST_HEAD(&stid->sc_cp_list); |
996e0938 | 946 | |
996e0938 | 947 | /* |
3abdb607 BF |
948 | * It shouldn't be a problem to reuse an opaque stateid value. |
949 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
950 | * example, a stray write retransmission could be accepted by | |
951 | * the server when it should have been rejected. Therefore, | |
952 | * adopt a trick from the sctp code to attempt to maximize the | |
953 | * amount of time until an id is reused, by ensuring they always | |
954 | * "increase" (mod INT_MAX): | |
996e0938 | 955 | */ |
3abdb607 BF |
956 | return stid; |
957 | out_free: | |
2c44a234 | 958 | kmem_cache_free(slab, stid); |
3abdb607 | 959 | return NULL; |
2a74aba7 BF |
960 | } |
961 | ||
e0639dc5 OK |
962 | /* |
963 | * Create a unique stateid_t to represent each COPY. | |
964 | */ | |
624322f1 OK |
965 | static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, |
966 | unsigned char sc_type) | |
e0639dc5 OK |
967 | { |
968 | int new_id; | |
969 | ||
9cc76801 | 970 | stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; |
624322f1 OK |
971 | stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; |
972 | stid->sc_type = sc_type; | |
973 | ||
e0639dc5 OK |
974 | idr_preload(GFP_KERNEL); |
975 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 OK |
976 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); |
977 | stid->stid.si_opaque.so_id = new_id; | |
ca9364dd | 978 | stid->stid.si_generation = 1; |
e0639dc5 OK |
979 | spin_unlock(&nn->s2s_cp_lock); |
980 | idr_preload_end(); | |
981 | if (new_id < 0) | |
982 | return 0; | |
e0639dc5 OK |
983 | return 1; |
984 | } | |
985 | ||
624322f1 OK |
986 | int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) |
987 | { | |
988 | return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); | |
989 | } | |
990 | ||
991 | struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, | |
992 | struct nfs4_stid *p_stid) | |
993 | { | |
994 | struct nfs4_cpntf_state *cps; | |
995 | ||
996 | cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); | |
997 | if (!cps) | |
998 | return NULL; | |
20b7d86f | 999 | cps->cpntf_time = ktime_get_boottime_seconds(); |
624322f1 OK |
1000 | refcount_set(&cps->cp_stateid.sc_count, 1); |
1001 | if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) | |
1002 | goto out_free; | |
1003 | spin_lock(&nn->s2s_cp_lock); | |
1004 | list_add(&cps->cp_list, &p_stid->sc_cp_list); | |
1005 | spin_unlock(&nn->s2s_cp_lock); | |
1006 | return cps; | |
1007 | out_free: | |
1008 | kfree(cps); | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
1012 | void nfs4_free_copy_state(struct nfsd4_copy *copy) | |
e0639dc5 OK |
1013 | { |
1014 | struct nfsd_net *nn; | |
1015 | ||
624322f1 | 1016 | WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID); |
e0639dc5 OK |
1017 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); |
1018 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 OK |
1019 | idr_remove(&nn->s2s_cp_stateids, |
1020 | copy->cp_stateid.stid.si_opaque.so_id); | |
1021 | spin_unlock(&nn->s2s_cp_lock); | |
1022 | } | |
1023 | ||
1024 | static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) | |
1025 | { | |
1026 | struct nfs4_cpntf_state *cps; | |
1027 | struct nfsd_net *nn; | |
1028 | ||
1029 | nn = net_generic(net, nfsd_net_id); | |
1030 | spin_lock(&nn->s2s_cp_lock); | |
1031 | while (!list_empty(&stid->sc_cp_list)) { | |
1032 | cps = list_first_entry(&stid->sc_cp_list, | |
1033 | struct nfs4_cpntf_state, cp_list); | |
1034 | _free_cpntf_state_locked(nn, cps); | |
1035 | } | |
e0639dc5 OK |
1036 | spin_unlock(&nn->s2s_cp_lock); |
1037 | } | |
1038 | ||
b49e084d | 1039 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 1040 | { |
6011695d | 1041 | struct nfs4_stid *stid; |
6011695d | 1042 | |
d19fb70d | 1043 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
1044 | if (!stid) |
1045 | return NULL; | |
1046 | ||
d19fb70d | 1047 | return openlockstateid(stid); |
6011695d TM |
1048 | } |
1049 | ||
1050 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
1051 | { | |
6011695d TM |
1052 | kmem_cache_free(deleg_slab, stid); |
1053 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
1054 | } |
1055 | ||
6282cd56 N |
1056 | /* |
1057 | * When we recall a delegation, we should be careful not to hand it | |
1058 | * out again straight away. | |
1059 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
1060 | * in which the filehandles of recalled delegations are "stored". | |
1061 | * If a filehandle appear in either filter, a delegation is blocked. | |
1062 | * When a delegation is recalled, the filehandle is stored in the "new" | |
1063 | * filter. | |
1064 | * Every 30 seconds we swap the filters and clear the "new" one, | |
1065 | * unless both are empty of course. | |
1066 | * | |
1067 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
1068 | * low 3 bytes as hash-table indices. | |
1069 | * | |
f54fe962 | 1070 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
1071 | * is used to manage concurrent access. Testing does not need the lock |
1072 | * except when swapping the two filters. | |
1073 | */ | |
f54fe962 | 1074 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
1075 | static struct bloom_pair { |
1076 | int entries, old_entries; | |
b3f255ef | 1077 | time64_t swap_time; |
6282cd56 N |
1078 | int new; /* index into 'set' */ |
1079 | DECLARE_BITMAP(set[2], 256); | |
1080 | } blocked_delegations; | |
1081 | ||
1082 | static int delegation_blocked(struct knfsd_fh *fh) | |
1083 | { | |
1084 | u32 hash; | |
1085 | struct bloom_pair *bd = &blocked_delegations; | |
1086 | ||
1087 | if (bd->entries == 0) | |
1088 | return 0; | |
b3f255ef | 1089 | if (ktime_get_seconds() - bd->swap_time > 30) { |
f54fe962 | 1090 | spin_lock(&blocked_delegations_lock); |
b3f255ef | 1091 | if (ktime_get_seconds() - bd->swap_time > 30) { |
6282cd56 N |
1092 | bd->entries -= bd->old_entries; |
1093 | bd->old_entries = bd->entries; | |
1094 | memset(bd->set[bd->new], 0, | |
1095 | sizeof(bd->set[0])); | |
1096 | bd->new = 1-bd->new; | |
b3f255ef | 1097 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1098 | } |
f54fe962 | 1099 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 1100 | } |
d8b26071 | 1101 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 N |
1102 | if (test_bit(hash&255, bd->set[0]) && |
1103 | test_bit((hash>>8)&255, bd->set[0]) && | |
1104 | test_bit((hash>>16)&255, bd->set[0])) | |
1105 | return 1; | |
1106 | ||
1107 | if (test_bit(hash&255, bd->set[1]) && | |
1108 | test_bit((hash>>8)&255, bd->set[1]) && | |
1109 | test_bit((hash>>16)&255, bd->set[1])) | |
1110 | return 1; | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static void block_delegations(struct knfsd_fh *fh) | |
1116 | { | |
1117 | u32 hash; | |
1118 | struct bloom_pair *bd = &blocked_delegations; | |
1119 | ||
d8b26071 | 1120 | hash = jhash(&fh->fh_raw, fh->fh_size, 0); |
6282cd56 | 1121 | |
f54fe962 | 1122 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
1123 | __set_bit(hash&255, bd->set[bd->new]); |
1124 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
1125 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
1126 | if (bd->entries == 0) | |
b3f255ef | 1127 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 1128 | bd->entries += 1; |
f54fe962 | 1129 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
1130 | } |
1131 | ||
1da177e4 | 1132 | static struct nfs4_delegation * |
86d29b10 | 1133 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
8287f009 | 1134 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
1135 | { |
1136 | struct nfs4_delegation *dp; | |
02a3508d | 1137 | long n; |
1da177e4 LT |
1138 | |
1139 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
1140 | n = atomic_long_inc_return(&num_delegations); |
1141 | if (n < 0 || n > max_delegations) | |
1142 | goto out_dec; | |
bbf936ed | 1143 | if (delegation_blocked(&fp->fi_fhandle)) |
02a3508d | 1144 | goto out_dec; |
d19fb70d | 1145 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 1146 | if (dp == NULL) |
02a3508d | 1147 | goto out_dec; |
6011695d | 1148 | |
2a74aba7 BF |
1149 | /* |
1150 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
1151 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
1152 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
1153 | */ |
1154 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
1155 | INIT_LIST_HEAD(&dp->dl_perfile); |
1156 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 1157 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
1158 | dp->dl_clnt_odstate = odstate; |
1159 | get_clnt_odstate(odstate); | |
99c41515 | 1160 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b | 1161 | dp->dl_retries = 1; |
66af2579 | 1162 | dp->dl_recalled = false; |
f0b5de1b | 1163 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, |
0162ac2b | 1164 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
1165 | get_nfs4_file(fp); |
1166 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 1167 | return dp; |
02a3508d TM |
1168 | out_dec: |
1169 | atomic_long_dec(&num_delegations); | |
1170 | return NULL; | |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | void | |
6011695d | 1174 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 1175 | { |
11b9164a | 1176 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
1177 | struct nfs4_client *clp = s->sc_client; |
1178 | ||
4770d722 JL |
1179 | might_lock(&clp->cl_lock); |
1180 | ||
a15dfcd5 | 1181 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 1182 | wake_up_all(&close_wq); |
6011695d | 1183 | return; |
b401be22 | 1184 | } |
6011695d | 1185 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
624322f1 | 1186 | nfs4_free_cpntf_statelist(clp->net, s); |
4770d722 | 1187 | spin_unlock(&clp->cl_lock); |
6011695d | 1188 | s->sc_free(s); |
11b9164a TM |
1189 | if (fp) |
1190 | put_nfs4_file(fp); | |
1da177e4 LT |
1191 | } |
1192 | ||
9767feb2 JL |
1193 | void |
1194 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
1195 | { | |
1196 | stateid_t *src = &stid->sc_stateid; | |
1197 | ||
1198 | spin_lock(&stid->sc_lock); | |
1199 | if (unlikely(++src->si_generation == 0)) | |
1200 | src->si_generation = 1; | |
1201 | memcpy(dst, src, sizeof(*dst)); | |
1202 | spin_unlock(&stid->sc_lock); | |
1203 | } | |
1204 | ||
353601e7 | 1205 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 1206 | { |
eb82dd39 | 1207 | struct nfsd_file *nf = NULL; |
b8232d33 | 1208 | |
6bcc034e | 1209 | spin_lock(&fp->fi_lock); |
353601e7 | 1210 | if (--fp->fi_delegees == 0) |
eb82dd39 | 1211 | swap(nf, fp->fi_deleg_file); |
6bcc034e JL |
1212 | spin_unlock(&fp->fi_lock); |
1213 | ||
eb82dd39 JL |
1214 | if (nf) |
1215 | nfsd_file_put(nf); | |
353601e7 BF |
1216 | } |
1217 | ||
1218 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
1219 | { | |
1220 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
eb82dd39 | 1221 | struct nfsd_file *nf = fp->fi_deleg_file; |
353601e7 BF |
1222 | |
1223 | WARN_ON_ONCE(!fp->fi_delegees); | |
1224 | ||
eb82dd39 | 1225 | vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 | 1226 | put_deleg_file(fp); |
1da177e4 LT |
1227 | } |
1228 | ||
0af6e690 BF |
1229 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
1230 | { | |
1231 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 1232 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
1233 | nfs4_put_stid(&dp->dl_stid); |
1234 | } | |
1235 | ||
cd61c522 | 1236 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 1237 | { |
3abdb607 | 1238 | s->sc_type = 0; |
6136d2b4 BF |
1239 | } |
1240 | ||
34ed9872 | 1241 | /** |
68b18f52 | 1242 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
1243 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
1244 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1245 | * | |
1246 | * Return: | |
68b18f52 | 1247 | * On success: true iff an existing delegation is found |
34ed9872 AE |
1248 | */ |
1249 | ||
68b18f52 BF |
1250 | static bool |
1251 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
1252 | { |
1253 | struct nfs4_delegation *searchdp = NULL; | |
1254 | struct nfs4_client *searchclp = NULL; | |
1255 | ||
1256 | lockdep_assert_held(&state_lock); | |
1257 | lockdep_assert_held(&fp->fi_lock); | |
1258 | ||
1259 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
1260 | searchclp = searchdp->dl_stid.sc_client; | |
1261 | if (clp == searchclp) { | |
51d87bc2 | 1262 | return true; |
34ed9872 AE |
1263 | } |
1264 | } | |
51d87bc2 | 1265 | return false; |
34ed9872 AE |
1266 | } |
1267 | ||
1268 | /** | |
1269 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
1270 | * @dp: a pointer to the nfs4_delegation we are adding. | |
1271 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1272 | * | |
1273 | * Return: | |
1274 | * On success: NULL if the delegation was successfully hashed. | |
1275 | * | |
1276 | * On error: -EAGAIN if one was previously granted to this | |
1277 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
1278 | * | |
1279 | */ | |
1280 | ||
1281 | static int | |
931ee56c BH |
1282 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
1283 | { | |
34ed9872 AE |
1284 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
1285 | ||
cdc97505 | 1286 | lockdep_assert_held(&state_lock); |
417c6629 | 1287 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 1288 | |
68b18f52 BF |
1289 | if (nfs4_delegation_exists(clp, fp)) |
1290 | return -EAGAIN; | |
a15dfcd5 | 1291 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 1292 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 1293 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1294 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1295 | return 0; | |
931ee56c BH |
1296 | } |
1297 | ||
548ec080 BF |
1298 | static bool delegation_hashed(struct nfs4_delegation *dp) |
1299 | { | |
1300 | return !(list_empty(&dp->dl_perfile)); | |
1301 | } | |
1302 | ||
3fcbbd24 | 1303 | static bool |
42690676 | 1304 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1305 | { |
11b9164a | 1306 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1307 | |
42690676 JL |
1308 | lockdep_assert_held(&state_lock); |
1309 | ||
548ec080 | 1310 | if (!delegation_hashed(dp)) |
3fcbbd24 JL |
1311 | return false; |
1312 | ||
b0fc29d6 | 1313 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1314 | /* Ensure that deleg break won't try to requeue it */ |
1315 | ++dp->dl_time; | |
417c6629 | 1316 | spin_lock(&fp->fi_lock); |
931ee56c | 1317 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1318 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1319 | list_del_init(&dp->dl_perfile); |
1320 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1321 | return true; |
3bd64a5b BF |
1322 | } |
1323 | ||
3bd64a5b BF |
1324 | static void destroy_delegation(struct nfs4_delegation *dp) |
1325 | { | |
3fcbbd24 JL |
1326 | bool unhashed; |
1327 | ||
42690676 | 1328 | spin_lock(&state_lock); |
3fcbbd24 | 1329 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1330 | spin_unlock(&state_lock); |
0af6e690 BF |
1331 | if (unhashed) |
1332 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1333 | } |
1334 | ||
1335 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1336 | { | |
1337 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1338 | ||
2d4a532d JL |
1339 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1340 | ||
0af6e690 | 1341 | if (clp->cl_minorversion) { |
3bd64a5b | 1342 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1343 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1344 | spin_lock(&clp->cl_lock); |
1345 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1346 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1347 | } |
0af6e690 | 1348 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1349 | } |
1350 | ||
1da177e4 LT |
1351 | /* |
1352 | * SETCLIENTID state | |
1353 | */ | |
1354 | ||
ddc04c41 BF |
1355 | static unsigned int clientid_hashval(u32 id) |
1356 | { | |
1357 | return id & CLIENT_HASH_MASK; | |
1358 | } | |
1359 | ||
6b189105 | 1360 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1361 | { |
6b189105 | 1362 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1363 | } |
1364 | ||
baeb4ff0 JL |
1365 | /* |
1366 | * A stateid that had a deny mode associated with it is being released | |
1367 | * or downgraded. Recalculate the deny mode on the file. | |
1368 | */ | |
1369 | static void | |
1370 | recalculate_deny_mode(struct nfs4_file *fp) | |
1371 | { | |
1372 | struct nfs4_ol_stateid *stp; | |
1373 | ||
1374 | spin_lock(&fp->fi_lock); | |
1375 | fp->fi_share_deny = 0; | |
1376 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1377 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1378 | spin_unlock(&fp->fi_lock); | |
1379 | } | |
1380 | ||
1381 | static void | |
1382 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1383 | { | |
1384 | int i; | |
1385 | bool change = false; | |
1386 | ||
1387 | for (i = 1; i < 4; i++) { | |
1388 | if ((i & deny) != i) { | |
1389 | change = true; | |
1390 | clear_deny(i, stp); | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | /* Recalculate per-file deny mode if there was a change */ | |
1395 | if (change) | |
11b9164a | 1396 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1397 | } |
1398 | ||
82c5ff1b JL |
1399 | /* release all access and file references for a given stateid */ |
1400 | static void | |
1401 | release_all_access(struct nfs4_ol_stateid *stp) | |
1402 | { | |
1403 | int i; | |
11b9164a | 1404 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1405 | |
1406 | if (fp && stp->st_deny_bmap != 0) | |
1407 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1408 | |
1409 | for (i = 1; i < 4; i++) { | |
1410 | if (test_access(i, stp)) | |
11b9164a | 1411 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1412 | clear_access(i, stp); |
1413 | } | |
1414 | } | |
1415 | ||
d50ffded KM |
1416 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1417 | { | |
1418 | kfree(sop->so_owner.data); | |
1419 | sop->so_ops->so_free(sop); | |
1420 | } | |
1421 | ||
6b180f0b JL |
1422 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1423 | { | |
a819ecc1 JL |
1424 | struct nfs4_client *clp = sop->so_client; |
1425 | ||
1426 | might_lock(&clp->cl_lock); | |
1427 | ||
1428 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1429 | return; |
8f4b54c5 | 1430 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1431 | spin_unlock(&clp->cl_lock); |
d50ffded | 1432 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1433 | } |
1434 | ||
a451b123 TM |
1435 | static bool |
1436 | nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) | |
1437 | { | |
1438 | return list_empty(&stp->st_perfile); | |
1439 | } | |
1440 | ||
e8568739 | 1441 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1442 | { |
11b9164a | 1443 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1444 | |
1c755dc1 JL |
1445 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1446 | ||
e8568739 JL |
1447 | if (list_empty(&stp->st_perfile)) |
1448 | return false; | |
1449 | ||
1d31a253 | 1450 | spin_lock(&fp->fi_lock); |
e8568739 | 1451 | list_del_init(&stp->st_perfile); |
1d31a253 | 1452 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1453 | list_del(&stp->st_perstateowner); |
e8568739 | 1454 | return true; |
529d7b2a BF |
1455 | } |
1456 | ||
6011695d | 1457 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1458 | { |
6011695d | 1459 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1460 | |
8287f009 | 1461 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1462 | release_all_access(stp); |
d3134b10 JL |
1463 | if (stp->st_stateowner) |
1464 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1465 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1466 | } |
1467 | ||
b49e084d | 1468 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1469 | { |
b49e084d JL |
1470 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1471 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
eb82dd39 | 1472 | struct nfsd_file *nf; |
529d7b2a | 1473 | |
eb82dd39 JL |
1474 | nf = find_any_file(stp->st_stid.sc_file); |
1475 | if (nf) { | |
1476 | get_file(nf->nf_file); | |
1477 | filp_close(nf->nf_file, (fl_owner_t)lo); | |
1478 | nfsd_file_put(nf); | |
1479 | } | |
b49e084d JL |
1480 | nfs4_free_ol_stateid(stid); |
1481 | } | |
1482 | ||
2c41beb0 JL |
1483 | /* |
1484 | * Put the persistent reference to an already unhashed generic stateid, while | |
1485 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1486 | * reaplist for later destruction. | |
1487 | */ | |
1488 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1489 | struct list_head *reaplist) | |
1490 | { | |
1491 | struct nfs4_stid *s = &stp->st_stid; | |
1492 | struct nfs4_client *clp = s->sc_client; | |
1493 | ||
1494 | lockdep_assert_held(&clp->cl_lock); | |
1495 | ||
1496 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1497 | ||
a15dfcd5 | 1498 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1499 | wake_up_all(&close_wq); |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1504 | list_add(&stp->st_locks, reaplist); | |
1505 | } | |
1506 | ||
e8568739 | 1507 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1508 | { |
f46c445b | 1509 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c | 1510 | |
a451b123 TM |
1511 | if (!unhash_ol_stateid(stp)) |
1512 | return false; | |
3c1c995c | 1513 | list_del_init(&stp->st_locks); |
cd61c522 | 1514 | nfs4_unhash_stid(&stp->st_stid); |
a451b123 | 1515 | return true; |
3c1c995c JL |
1516 | } |
1517 | ||
1518 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1519 | { | |
f46c445b | 1520 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1521 | bool unhashed; |
3c1c995c | 1522 | |
f46c445b | 1523 | spin_lock(&clp->cl_lock); |
e8568739 | 1524 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1525 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1526 | if (unhashed) |
1527 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1528 | } |
1529 | ||
c58c6610 | 1530 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1531 | { |
d4f0489f | 1532 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1533 | |
d4f0489f | 1534 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1535 | |
8f4b54c5 JL |
1536 | list_del_init(&lo->lo_owner.so_strhash); |
1537 | } | |
1538 | ||
2c41beb0 JL |
1539 | /* |
1540 | * Free a list of generic stateids that were collected earlier after being | |
1541 | * fully unhashed. | |
1542 | */ | |
1543 | static void | |
1544 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1545 | { | |
1546 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1547 | struct nfs4_file *fp; |
2c41beb0 JL |
1548 | |
1549 | might_sleep(); | |
1550 | ||
1551 | while (!list_empty(reaplist)) { | |
1552 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1553 | st_locks); | |
1554 | list_del(&stp->st_locks); | |
fb94d766 | 1555 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1556 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1557 | if (fp) |
1558 | put_nfs4_file(fp); | |
2c41beb0 JL |
1559 | } |
1560 | } | |
1561 | ||
d83017f9 JL |
1562 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1563 | struct list_head *reaplist) | |
3c87b9b7 TM |
1564 | { |
1565 | struct nfs4_ol_stateid *stp; | |
1566 | ||
e8568739 JL |
1567 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1568 | ||
3c87b9b7 TM |
1569 | while (!list_empty(&open_stp->st_locks)) { |
1570 | stp = list_entry(open_stp->st_locks.next, | |
1571 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1572 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1573 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1574 | } |
1575 | } | |
1576 | ||
e8568739 | 1577 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1578 | struct list_head *reaplist) |
2283963f | 1579 | { |
2c41beb0 JL |
1580 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1581 | ||
a451b123 TM |
1582 | if (!unhash_ol_stateid(stp)) |
1583 | return false; | |
d83017f9 | 1584 | release_open_stateid_locks(stp, reaplist); |
a451b123 | 1585 | return true; |
38c387b5 BF |
1586 | } |
1587 | ||
1588 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1589 | { | |
2c41beb0 JL |
1590 | LIST_HEAD(reaplist); |
1591 | ||
1592 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1593 | if (unhash_open_stateid(stp, &reaplist)) |
1594 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1595 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1596 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1597 | } |
1598 | ||
7ffb5880 | 1599 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1600 | { |
d4f0489f | 1601 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1602 | |
d4f0489f | 1603 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1604 | |
8f4b54c5 JL |
1605 | list_del_init(&oo->oo_owner.so_strhash); |
1606 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1607 | } |
1608 | ||
f7a4d872 BF |
1609 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1610 | { | |
217526e7 JL |
1611 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1612 | nfsd_net_id); | |
1613 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1614 | |
217526e7 JL |
1615 | spin_lock(&nn->client_lock); |
1616 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1617 | if (s) { |
d3134b10 | 1618 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1619 | oo->oo_last_closed_stid = NULL; |
1620 | } | |
217526e7 JL |
1621 | spin_unlock(&nn->client_lock); |
1622 | if (s) | |
1623 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1624 | } |
1625 | ||
2c41beb0 | 1626 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1627 | { |
1628 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1629 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1630 | struct list_head reaplist; |
7ffb5880 | 1631 | |
2c41beb0 | 1632 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1633 | |
2c41beb0 JL |
1634 | spin_lock(&clp->cl_lock); |
1635 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1636 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1637 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1638 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1639 | if (unhash_open_stateid(stp, &reaplist)) |
1640 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1641 | } |
d4f0489f | 1642 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1643 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1644 | release_last_closed_stateid(oo); |
6b180f0b | 1645 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1646 | } |
1647 | ||
5282fd72 ME |
1648 | static inline int |
1649 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1650 | { | |
1651 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1652 | ||
1653 | return sid->sequence % SESSION_HASH_SIZE; | |
1654 | } | |
1655 | ||
135dd002 | 1656 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1657 | static inline void |
1658 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1659 | { | |
1660 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1661 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1662 | } | |
8f199b82 TM |
1663 | #else |
1664 | static inline void | |
1665 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1666 | { | |
1667 | } | |
1668 | #endif | |
1669 | ||
9411b1d4 BF |
1670 | /* |
1671 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1672 | * won't be used for replay. | |
1673 | */ | |
1674 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1675 | { | |
1676 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1677 | ||
1678 | if (nfserr == nfserr_replay_me) | |
1679 | return; | |
1680 | ||
1681 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1682 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1683 | return; |
1684 | } | |
1685 | if (!so) | |
1686 | return; | |
1687 | if (so->so_is_open_owner) | |
1688 | release_last_closed_stateid(openowner(so)); | |
1689 | so->so_seqid++; | |
1690 | return; | |
1691 | } | |
5282fd72 | 1692 | |
ec6b5d7b AA |
1693 | static void |
1694 | gen_sessionid(struct nfsd4_session *ses) | |
1695 | { | |
1696 | struct nfs4_client *clp = ses->se_client; | |
1697 | struct nfsd4_sessionid *sid; | |
1698 | ||
1699 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1700 | sid->clientid = clp->cl_clientid; | |
1701 | sid->sequence = current_sessionid++; | |
1702 | sid->reserved = 0; | |
1703 | } | |
1704 | ||
1705 | /* | |
a649637c AA |
1706 | * The protocol defines ca_maxresponssize_cached to include the size of |
1707 | * the rpc header, but all we need to cache is the data starting after | |
1708 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1709 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1710 | * value that is the number of bytes in our cache plus a few additional | |
1711 | * bytes. In order to stay on the safe side, and not promise more than | |
1712 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1713 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1714 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1715 | * for the SEQUENCE op response: | |
1716 | */ | |
1717 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1718 | ||
557ce264 AA |
1719 | static void |
1720 | free_session_slots(struct nfsd4_session *ses) | |
1721 | { | |
1722 | int i; | |
1723 | ||
53da6a53 BF |
1724 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1725 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1726 | kfree(ses->se_slots[i]); |
53da6a53 | 1727 | } |
557ce264 AA |
1728 | } |
1729 | ||
a649637c | 1730 | /* |
efe0cb6d BF |
1731 | * We don't actually need to cache the rpc and session headers, so we |
1732 | * can allocate a little less for each slot: | |
1733 | */ | |
55c760cf | 1734 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1735 | { |
55c760cf | 1736 | u32 size; |
efe0cb6d | 1737 | |
55c760cf BF |
1738 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1739 | size = 0; | |
1740 | else | |
1741 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1742 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1743 | } |
ec6b5d7b | 1744 | |
5b6feee9 BF |
1745 | /* |
1746 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1747 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1748 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1749 | */ |
2030ca56 | 1750 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
ec6b5d7b | 1751 | { |
55c760cf BF |
1752 | u32 slotsize = slot_bytes(ca); |
1753 | u32 num = ca->maxreqs; | |
c54f24e3 | 1754 | unsigned long avail, total_avail; |
2030ca56 | 1755 | unsigned int scale_factor; |
ec6b5d7b | 1756 | |
5b6feee9 | 1757 | spin_lock(&nfsd_drc_lock); |
7f49fd5d N |
1758 | if (nfsd_drc_max_mem > nfsd_drc_mem_used) |
1759 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; | |
1760 | else | |
1761 | /* We have handed out more space than we chose in | |
1762 | * set_max_drc() to allow. That isn't really a | |
1763 | * problem as long as that doesn't make us think we | |
1764 | * have lots more due to integer overflow. | |
1765 | */ | |
1766 | total_avail = 0; | |
c54f24e3 | 1767 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); |
de766e57 | 1768 | /* |
2030ca56 | 1769 | * Never use more than a fraction of the remaining memory, |
7f49fd5d | 1770 | * unless it's the only way to give this client a slot. |
2030ca56 N |
1771 | * The chosen fraction is either 1/8 or 1/number of threads, |
1772 | * whichever is smaller. This ensures there are adequate | |
1773 | * slots to support multiple clients per thread. | |
7f49fd5d N |
1774 | * Give the client one slot even if that would require |
1775 | * over-allocation--it is better than failure. | |
de766e57 | 1776 | */ |
2030ca56 N |
1777 | scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); |
1778 | ||
1779 | avail = clamp_t(unsigned long, avail, slotsize, | |
1780 | total_avail/scale_factor); | |
5b6feee9 | 1781 | num = min_t(int, num, avail / slotsize); |
7f49fd5d | 1782 | num = max_t(int, num, 1); |
5b6feee9 BF |
1783 | nfsd_drc_mem_used += num * slotsize; |
1784 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1785 | |
5b6feee9 BF |
1786 | return num; |
1787 | } | |
ec6b5d7b | 1788 | |
55c760cf | 1789 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1790 | { |
55c760cf BF |
1791 | int slotsize = slot_bytes(ca); |
1792 | ||
4bd9b0f4 | 1793 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1794 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1795 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1796 | } |
ec6b5d7b | 1797 | |
60810e54 KM |
1798 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1799 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1800 | { |
60810e54 KM |
1801 | int numslots = fattrs->maxreqs; |
1802 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1803 | struct nfsd4_session *new; |
1804 | int mem, i; | |
a649637c | 1805 | |
5b6feee9 BF |
1806 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1807 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1808 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1809 | |
5b6feee9 BF |
1810 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1811 | if (!new) | |
1812 | return NULL; | |
557ce264 | 1813 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1814 | for (i = 0; i < numslots; i++) { |
55c760cf | 1815 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1816 | if (!new->se_slots[i]) |
557ce264 | 1817 | goto out_free; |
557ce264 | 1818 | } |
60810e54 KM |
1819 | |
1820 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1821 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1822 | ||
5b6feee9 BF |
1823 | return new; |
1824 | out_free: | |
1825 | while (i--) | |
1826 | kfree(new->se_slots[i]); | |
1827 | kfree(new); | |
1828 | return NULL; | |
ec6b5d7b AA |
1829 | } |
1830 | ||
19cf5c02 BF |
1831 | static void free_conn(struct nfsd4_conn *c) |
1832 | { | |
1833 | svc_xprt_put(c->cn_xprt); | |
1834 | kfree(c); | |
1835 | } | |
ec6b5d7b | 1836 | |
19cf5c02 BF |
1837 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1838 | { | |
1839 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1840 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1841 | |
806d65b6 CL |
1842 | trace_nfsd_cb_lost(clp); |
1843 | ||
19cf5c02 BF |
1844 | spin_lock(&clp->cl_lock); |
1845 | if (!list_empty(&c->cn_persession)) { | |
1846 | list_del(&c->cn_persession); | |
1847 | free_conn(c); | |
1848 | } | |
eea49806 | 1849 | nfsd4_probe_callback(clp); |
2e4b7239 | 1850 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1851 | } |
ec6b5d7b | 1852 | |
d29c374c | 1853 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1854 | { |
c7662518 | 1855 | struct nfsd4_conn *conn; |
ec6b5d7b | 1856 | |
c7662518 BF |
1857 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1858 | if (!conn) | |
db90681d | 1859 | return NULL; |
c7662518 BF |
1860 | svc_xprt_get(rqstp->rq_xprt); |
1861 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1862 | conn->cn_flags = flags; |
db90681d BF |
1863 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1864 | return conn; | |
1865 | } | |
a649637c | 1866 | |
328ead28 BF |
1867 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1868 | { | |
1869 | conn->cn_session = ses; | |
1870 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1871 | } |
1872 | ||
db90681d | 1873 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1874 | { |
db90681d | 1875 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1876 | |
c7662518 | 1877 | spin_lock(&clp->cl_lock); |
328ead28 | 1878 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1879 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1880 | } |
1881 | ||
21b75b01 | 1882 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1883 | { |
19cf5c02 | 1884 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1885 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1886 | } |
1887 | ||
e1ff371f | 1888 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1889 | { |
21b75b01 | 1890 | int ret; |
ec6b5d7b | 1891 | |
db90681d | 1892 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1893 | ret = nfsd4_register_conn(conn); |
1894 | if (ret) | |
1895 | /* oops; xprt is already down: */ | |
1896 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1897 | /* We may have gained or lost a callback channel: */ |
1898 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1899 | } |
ec6b5d7b | 1900 | |
e1ff371f | 1901 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1902 | { |
1903 | u32 dir = NFS4_CDFC4_FORE; | |
1904 | ||
e1ff371f | 1905 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1906 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1907 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1908 | } |
1909 | ||
1910 | /* must be called under client_lock */ | |
19cf5c02 | 1911 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1912 | { |
19cf5c02 BF |
1913 | struct nfs4_client *clp = s->se_client; |
1914 | struct nfsd4_conn *c; | |
ec6b5d7b | 1915 | |
19cf5c02 BF |
1916 | spin_lock(&clp->cl_lock); |
1917 | while (!list_empty(&s->se_conns)) { | |
1918 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1919 | list_del_init(&c->cn_persession); | |
1920 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1921 | |
19cf5c02 BF |
1922 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1923 | free_conn(c); | |
ec6b5d7b | 1924 | |
19cf5c02 BF |
1925 | spin_lock(&clp->cl_lock); |
1926 | } | |
1927 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1928 | } |
ec6b5d7b | 1929 | |
1377b69e BF |
1930 | static void __free_session(struct nfsd4_session *ses) |
1931 | { | |
1377b69e BF |
1932 | free_session_slots(ses); |
1933 | kfree(ses); | |
1934 | } | |
1935 | ||
66b2b9b2 | 1936 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1937 | { |
19cf5c02 | 1938 | nfsd4_del_conns(ses); |
55c760cf | 1939 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1940 | __free_session(ses); |
c7662518 BF |
1941 | } |
1942 | ||
135ae827 | 1943 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1944 | { |
a827bcb2 | 1945 | int idx; |
1872de0e | 1946 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1947 | |
ec6b5d7b AA |
1948 | new->se_client = clp; |
1949 | gen_sessionid(new); | |
ec6b5d7b | 1950 | |
c7662518 BF |
1951 | INIT_LIST_HEAD(&new->se_conns); |
1952 | ||
ac7c46f2 | 1953 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1954 | new->se_flags = cses->flags; |
8b5ce5cd | 1955 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1956 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1957 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1958 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1959 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1960 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1961 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1962 | spin_unlock(&clp->cl_lock); |
60810e54 | 1963 | |
b0d2e42c | 1964 | { |
edd76786 | 1965 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1966 | /* |
1967 | * This is a little silly; with sessions there's no real | |
1968 | * use for the callback address. Use the peer address | |
1969 | * as a reasonable default for now, but consider fixing | |
1970 | * the rpc client not to require an address in the | |
1971 | * future: | |
1972 | */ | |
edd76786 BF |
1973 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1974 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1975 | } |
ec6b5d7b AA |
1976 | } |
1977 | ||
9089f1b4 | 1978 | /* caller must hold client_lock */ |
5282fd72 | 1979 | static struct nfsd4_session * |
d4e19e70 | 1980 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1981 | { |
1982 | struct nfsd4_session *elem; | |
1983 | int idx; | |
1872de0e | 1984 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1985 | |
0a880a28 TM |
1986 | lockdep_assert_held(&nn->client_lock); |
1987 | ||
5282fd72 ME |
1988 | dump_sessionid(__func__, sessionid); |
1989 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1990 | /* Search in the appropriate list */ |
1872de0e | 1991 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1992 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1993 | NFS4_MAX_SESSIONID_LEN)) { | |
1994 | return elem; | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | dprintk("%s: session not found\n", __func__); | |
1999 | return NULL; | |
2000 | } | |
2001 | ||
d4e19e70 TM |
2002 | static struct nfsd4_session * |
2003 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
2004 | __be32 *ret) | |
2005 | { | |
2006 | struct nfsd4_session *session; | |
2007 | __be32 status = nfserr_badsession; | |
2008 | ||
2009 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
2010 | if (!session) | |
2011 | goto out; | |
2012 | status = nfsd4_get_session_locked(session); | |
2013 | if (status) | |
2014 | session = NULL; | |
2015 | out: | |
2016 | *ret = status; | |
2017 | return session; | |
2018 | } | |
2019 | ||
9089f1b4 | 2020 | /* caller must hold client_lock */ |
7116ed6b | 2021 | static void |
5282fd72 | 2022 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 2023 | { |
0a880a28 TM |
2024 | struct nfs4_client *clp = ses->se_client; |
2025 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2026 | ||
2027 | lockdep_assert_held(&nn->client_lock); | |
2028 | ||
7116ed6b | 2029 | list_del(&ses->se_hash); |
4c649378 | 2030 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 2031 | list_del(&ses->se_perclnt); |
4c649378 | 2032 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
2033 | } |
2034 | ||
1da177e4 LT |
2035 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
2036 | static int | |
2c142baa | 2037 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 2038 | { |
bbc7f33a BF |
2039 | /* |
2040 | * We're assuming the clid was not given out from a boot | |
2041 | * precisely 2^32 (about 136 years) before this one. That seems | |
2042 | * a safe assumption: | |
2043 | */ | |
2044 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 2045 | return 0; |
dd5e3fbc | 2046 | trace_nfsd_clid_stale(clid); |
1da177e4 LT |
2047 | return 1; |
2048 | } | |
2049 | ||
2050 | /* | |
2051 | * XXX Should we use a slab cache ? | |
2052 | * This type of memory management is somewhat inefficient, but we use it | |
2053 | * anyway since SETCLIENTID is not a common operation. | |
2054 | */ | |
0926c395 DN |
2055 | static struct nfs4_client *alloc_client(struct xdr_netobj name, |
2056 | struct nfsd_net *nn) | |
1da177e4 LT |
2057 | { |
2058 | struct nfs4_client *clp; | |
d4f0489f | 2059 | int i; |
1da177e4 | 2060 | |
4271c2c0 DN |
2061 | if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) { |
2062 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
2063 | return NULL; | |
2064 | } | |
9258a2d5 | 2065 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
2066 | if (clp == NULL) |
2067 | return NULL; | |
6f4859b8 | 2068 | xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); |
d4f0489f TM |
2069 | if (clp->cl_name.data == NULL) |
2070 | goto err_no_name; | |
6da2ec56 KC |
2071 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
2072 | sizeof(struct list_head), | |
2073 | GFP_KERNEL); | |
d4f0489f TM |
2074 | if (!clp->cl_ownerstr_hashtbl) |
2075 | goto err_no_hashtbl; | |
2076 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
2077 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
5694c93e TM |
2078 | INIT_LIST_HEAD(&clp->cl_sessions); |
2079 | idr_init(&clp->cl_stateids); | |
14ed14cc | 2080 | atomic_set(&clp->cl_rpc_users, 0); |
5694c93e | 2081 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
66af2579 | 2082 | clp->cl_state = NFSD4_ACTIVE; |
0926c395 | 2083 | atomic_inc(&nn->nfs4_client_count); |
66af2579 | 2084 | atomic_set(&clp->cl_delegs_in_recall, 0); |
5694c93e TM |
2085 | INIT_LIST_HEAD(&clp->cl_idhash); |
2086 | INIT_LIST_HEAD(&clp->cl_openowners); | |
2087 | INIT_LIST_HEAD(&clp->cl_delegations); | |
2088 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 2089 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
2090 | #ifdef CONFIG_NFSD_PNFS |
2091 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
2092 | #endif | |
e0639dc5 OK |
2093 | INIT_LIST_HEAD(&clp->async_copies); |
2094 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
2095 | spin_lock_init(&clp->cl_lock); |
2096 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 2097 | return clp; |
d4f0489f TM |
2098 | err_no_hashtbl: |
2099 | kfree(clp->cl_name.data); | |
2100 | err_no_name: | |
9258a2d5 | 2101 | kmem_cache_free(client_slab, clp); |
d4f0489f | 2102 | return NULL; |
1da177e4 LT |
2103 | } |
2104 | ||
59f8e91b BF |
2105 | static void __free_client(struct kref *k) |
2106 | { | |
e8a79fb1 BF |
2107 | struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); |
2108 | struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); | |
59f8e91b BF |
2109 | |
2110 | free_svc_cred(&clp->cl_cred); | |
2111 | kfree(clp->cl_ownerstr_hashtbl); | |
2112 | kfree(clp->cl_name.data); | |
79123444 BF |
2113 | kfree(clp->cl_nii_domain.data); |
2114 | kfree(clp->cl_nii_name.data); | |
59f8e91b | 2115 | idr_destroy(&clp->cl_stateids); |
59f8e91b BF |
2116 | kmem_cache_free(client_slab, clp); |
2117 | } | |
2118 | ||
297e57a2 | 2119 | static void drop_client(struct nfs4_client *clp) |
59f8e91b | 2120 | { |
e8a79fb1 | 2121 | kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); |
59f8e91b BF |
2122 | } |
2123 | ||
4dd86e15 | 2124 | static void |
1da177e4 LT |
2125 | free_client(struct nfs4_client *clp) |
2126 | { | |
792c95dd BF |
2127 | while (!list_empty(&clp->cl_sessions)) { |
2128 | struct nfsd4_session *ses; | |
2129 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
2130 | se_perclnt); | |
2131 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
2132 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
2133 | free_session(ses); | |
792c95dd | 2134 | } |
4cb57e30 | 2135 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
89c905be | 2136 | if (clp->cl_nfsd_dentry) { |
e8a79fb1 | 2137 | nfsd_client_rmdir(clp->cl_nfsd_dentry); |
89c905be BF |
2138 | clp->cl_nfsd_dentry = NULL; |
2139 | wake_up_all(&expiry_wq); | |
2140 | } | |
59f8e91b | 2141 | drop_client(clp); |
1da177e4 LT |
2142 | } |
2143 | ||
84d38ac9 | 2144 | /* must be called under the client_lock */ |
4beb345b | 2145 | static void |
84d38ac9 BH |
2146 | unhash_client_locked(struct nfs4_client *clp) |
2147 | { | |
4beb345b | 2148 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
2149 | struct nfsd4_session *ses; |
2150 | ||
0a880a28 TM |
2151 | lockdep_assert_held(&nn->client_lock); |
2152 | ||
4beb345b TM |
2153 | /* Mark the client as expired! */ |
2154 | clp->cl_time = 0; | |
2155 | /* Make it invisible */ | |
2156 | if (!list_empty(&clp->cl_idhash)) { | |
2157 | list_del_init(&clp->cl_idhash); | |
2158 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
2159 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
2160 | else | |
2161 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
2162 | } | |
2163 | list_del_init(&clp->cl_lru); | |
4c649378 | 2164 | spin_lock(&clp->cl_lock); |
792c95dd BF |
2165 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
2166 | list_del_init(&ses->se_hash); | |
4c649378 | 2167 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
2168 | } |
2169 | ||
1da177e4 | 2170 | static void |
4beb345b TM |
2171 | unhash_client(struct nfs4_client *clp) |
2172 | { | |
2173 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2174 | ||
2175 | spin_lock(&nn->client_lock); | |
2176 | unhash_client_locked(clp); | |
2177 | spin_unlock(&nn->client_lock); | |
2178 | } | |
2179 | ||
97403d95 JL |
2180 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
2181 | { | |
14ed14cc | 2182 | if (atomic_read(&clp->cl_rpc_users)) |
97403d95 JL |
2183 | return nfserr_jukebox; |
2184 | unhash_client_locked(clp); | |
2185 | return nfs_ok; | |
2186 | } | |
2187 | ||
4beb345b TM |
2188 | static void |
2189 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 2190 | { |
0926c395 | 2191 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
68ef3bc3 | 2192 | int i; |
fe0750e5 | 2193 | struct nfs4_openowner *oo; |
1da177e4 | 2194 | struct nfs4_delegation *dp; |
1da177e4 LT |
2195 | struct list_head reaplist; |
2196 | ||
1da177e4 | 2197 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 2198 | spin_lock(&state_lock); |
ea1da636 N |
2199 | while (!list_empty(&clp->cl_delegations)) { |
2200 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 2201 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 2202 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 2203 | } |
cdc97505 | 2204 | spin_unlock(&state_lock); |
1da177e4 LT |
2205 | while (!list_empty(&reaplist)) { |
2206 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 2207 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 2208 | destroy_unhashed_deleg(dp); |
1da177e4 | 2209 | } |
2d4a532d | 2210 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 2211 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 2212 | list_del_init(&dp->dl_recall_lru); |
6011695d | 2213 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 2214 | } |
ea1da636 | 2215 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 2216 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 2217 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 2218 | release_openowner(oo); |
1da177e4 | 2219 | } |
68ef3bc3 JL |
2220 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
2221 | struct nfs4_stateowner *so, *tmp; | |
2222 | ||
2223 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
2224 | so_strhash) { | |
2225 | /* Should be no openowners at this point */ | |
2226 | WARN_ON_ONCE(so->so_is_open_owner); | |
2227 | remove_blocked_locks(lockowner(so)); | |
2228 | } | |
2229 | } | |
9cf514cc | 2230 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 2231 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 2232 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
2233 | if (clp->cl_cb_conn.cb_xprt) |
2234 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
0926c395 | 2235 | atomic_add_unless(&nn->nfs4_client_count, -1, 0); |
221a6876 | 2236 | free_client(clp); |
89c905be | 2237 | wake_up_all(&expiry_wq); |
1da177e4 LT |
2238 | } |
2239 | ||
4beb345b TM |
2240 | static void |
2241 | destroy_client(struct nfs4_client *clp) | |
2242 | { | |
2243 | unhash_client(clp); | |
2244 | __destroy_client(clp); | |
2245 | } | |
2246 | ||
362063a5 SM |
2247 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2248 | { | |
2249 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2250 | ||
2251 | if (!nn->track_reclaim_completes) | |
2252 | return; | |
2253 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2254 | return; | |
2255 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2256 | nn->reclaim_str_hashtbl_size) { | |
2257 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2258 | clp->net->ns.inum); | |
2259 | nfsd4_end_grace(nn); | |
2260 | } | |
2261 | } | |
2262 | ||
0d22f68f BF |
2263 | static void expire_client(struct nfs4_client *clp) |
2264 | { | |
4beb345b | 2265 | unhash_client(clp); |
0d22f68f | 2266 | nfsd4_client_record_remove(clp); |
4beb345b | 2267 | __destroy_client(clp); |
0d22f68f BF |
2268 | } |
2269 | ||
35bba9a3 BF |
2270 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2271 | { | |
2272 | memcpy(target->cl_verifier.data, source->data, | |
2273 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2274 | } |
2275 | ||
35bba9a3 BF |
2276 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2277 | { | |
1da177e4 LT |
2278 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2279 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2280 | } | |
2281 | ||
50043859 BF |
2282 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2283 | { | |
2f10fdcb N |
2284 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2285 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2286 | GFP_KERNEL); | |
9abdda5d CL |
2287 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2288 | if ((source->cr_principal && !target->cr_principal) || | |
2289 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2290 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2291 | return -ENOMEM; |
50043859 | 2292 | |
d5497fc6 | 2293 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2294 | target->cr_uid = source->cr_uid; |
2295 | target->cr_gid = source->cr_gid; | |
2296 | target->cr_group_info = source->cr_group_info; | |
2297 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2298 | target->cr_gss_mech = source->cr_gss_mech; |
2299 | if (source->cr_gss_mech) | |
2300 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2301 | return 0; |
1da177e4 LT |
2302 | } |
2303 | ||
ef17af2a | 2304 | static int |
ac55fdc4 JL |
2305 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2306 | { | |
ef17af2a RV |
2307 | if (o1->len < o2->len) |
2308 | return -1; | |
2309 | if (o1->len > o2->len) | |
2310 | return 1; | |
2311 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2312 | } |
2313 | ||
1da177e4 | 2314 | static int |
599e0a22 BF |
2315 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2316 | { | |
2317 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2318 | } |
2319 | ||
2320 | static int | |
599e0a22 BF |
2321 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2322 | { | |
2323 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2324 | } |
2325 | ||
8fbba96e BF |
2326 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2327 | { | |
2328 | int i; | |
2329 | ||
2330 | if (g1->ngroups != g2->ngroups) | |
2331 | return false; | |
2332 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2333 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2334 | return false; |
2335 | return true; | |
2336 | } | |
2337 | ||
68eb3508 BF |
2338 | /* |
2339 | * RFC 3530 language requires clid_inuse be returned when the | |
2340 | * "principal" associated with a requests differs from that previously | |
2341 | * used. We use uid, gid's, and gss principal string as our best | |
2342 | * approximation. We also don't want to allow non-gss use of a client | |
2343 | * established using gss: in theory cr_principal should catch that | |
2344 | * change, but in practice cr_principal can be null even in the gss case | |
2345 | * since gssd doesn't always pass down a principal string. | |
2346 | */ | |
2347 | static bool is_gss_cred(struct svc_cred *cr) | |
2348 | { | |
2349 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2350 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2351 | } | |
2352 | ||
2353 | ||
5559b50a | 2354 | static bool |
599e0a22 BF |
2355 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2356 | { | |
68eb3508 | 2357 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2358 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2359 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2360 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2361 | return false; | |
9abdda5d | 2362 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2363 | if (cr1->cr_principal == cr2->cr_principal) |
2364 | return true; | |
2365 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2366 | return false; | |
5559b50a | 2367 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2368 | } |
2369 | ||
57266a6e BF |
2370 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2371 | { | |
2372 | struct svc_cred *cr = &rqstp->rq_cred; | |
2373 | u32 service; | |
2374 | ||
c4720591 BF |
2375 | if (!cr->cr_gss_mech) |
2376 | return false; | |
57266a6e BF |
2377 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2378 | return service == RPC_GSS_SVC_INTEGRITY || | |
2379 | service == RPC_GSS_SVC_PRIVACY; | |
2380 | } | |
2381 | ||
dedeb13f | 2382 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2383 | { |
2384 | struct svc_cred *cr = &rqstp->rq_cred; | |
2385 | ||
2386 | if (!cl->cl_mach_cred) | |
2387 | return true; | |
2388 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2389 | return false; | |
2390 | if (!svc_rqst_integrity_protected(rqstp)) | |
2391 | return false; | |
414ca017 BF |
2392 | if (cl->cl_cred.cr_raw_principal) |
2393 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2394 | cr->cr_raw_principal); | |
57266a6e BF |
2395 | if (!cr->cr_principal) |
2396 | return false; | |
2397 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2398 | } | |
2399 | ||
294ac32e | 2400 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2401 | { |
ab4684d1 | 2402 | __be32 verf[2]; |
1da177e4 | 2403 | |
f419992c JL |
2404 | /* |
2405 | * This is opaque to client, so no need to byte-swap. Use | |
2406 | * __force to keep sparse happy | |
2407 | */ | |
9104ae49 | 2408 | verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); |
19311aa8 | 2409 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2410 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2411 | } |
2412 | ||
294ac32e JL |
2413 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2414 | { | |
9cc76801 | 2415 | clp->cl_clientid.cl_boot = (u32)nn->boot_time; |
294ac32e JL |
2416 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
2417 | gen_confirm(clp, nn); | |
2418 | } | |
2419 | ||
4770d722 JL |
2420 | static struct nfs4_stid * |
2421 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2422 | { |
3abdb607 BF |
2423 | struct nfs4_stid *ret; |
2424 | ||
2425 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2426 | if (!ret || !ret->sc_type) | |
2427 | return NULL; | |
2428 | return ret; | |
4d71ab87 BF |
2429 | } |
2430 | ||
4770d722 JL |
2431 | static struct nfs4_stid * |
2432 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2433 | { |
2434 | struct nfs4_stid *s; | |
4d71ab87 | 2435 | |
4770d722 JL |
2436 | spin_lock(&cl->cl_lock); |
2437 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2438 | if (s != NULL) { |
2439 | if (typemask & s->sc_type) | |
a15dfcd5 | 2440 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2441 | else |
2442 | s = NULL; | |
2443 | } | |
4770d722 JL |
2444 | spin_unlock(&cl->cl_lock); |
2445 | return s; | |
4581d140 BF |
2446 | } |
2447 | ||
a204f25e BF |
2448 | static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) |
2449 | { | |
2450 | struct nfsdfs_client *nc; | |
2451 | nc = get_nfsdfs_client(inode); | |
2452 | if (!nc) | |
2453 | return NULL; | |
2454 | return container_of(nc, struct nfs4_client, cl_nfsdfs); | |
2455 | } | |
2456 | ||
169319f1 BF |
2457 | static void seq_quote_mem(struct seq_file *m, char *data, int len) |
2458 | { | |
2459 | seq_printf(m, "\""); | |
c0546391 | 2460 | seq_escape_mem(m, data, len, ESCAPE_HEX | ESCAPE_NAP | ESCAPE_APPEND, "\"\\"); |
169319f1 BF |
2461 | seq_printf(m, "\""); |
2462 | } | |
2463 | ||
3518c866 DW |
2464 | static const char *cb_state2str(int state) |
2465 | { | |
2466 | switch (state) { | |
2467 | case NFSD4_CB_UP: | |
2468 | return "UP"; | |
2469 | case NFSD4_CB_UNKNOWN: | |
2470 | return "UNKNOWN"; | |
2471 | case NFSD4_CB_DOWN: | |
2472 | return "DOWN"; | |
2473 | case NFSD4_CB_FAULT: | |
2474 | return "FAULT"; | |
2475 | } | |
2476 | return "UNDEFINED"; | |
2477 | } | |
2478 | ||
97ad4031 BF |
2479 | static int client_info_show(struct seq_file *m, void *v) |
2480 | { | |
2481 | struct inode *inode = m->private; | |
97ad4031 BF |
2482 | struct nfs4_client *clp; |
2483 | u64 clid; | |
2484 | ||
a204f25e BF |
2485 | clp = get_nfsdfs_clp(inode); |
2486 | if (!clp) | |
97ad4031 | 2487 | return -ENXIO; |
97ad4031 BF |
2488 | memcpy(&clid, &clp->cl_clientid, sizeof(clid)); |
2489 | seq_printf(m, "clientid: 0x%llx\n", clid); | |
169319f1 | 2490 | seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); |
e9488d5a DN |
2491 | |
2492 | if (clp->cl_state == NFSD4_COURTESY) | |
2493 | seq_puts(m, "status: courtesy\n"); | |
2494 | else if (clp->cl_state == NFSD4_EXPIRABLE) | |
2495 | seq_puts(m, "status: expirable\n"); | |
2496 | else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
472d155a N |
2497 | seq_puts(m, "status: confirmed\n"); |
2498 | else | |
2499 | seq_puts(m, "status: unconfirmed\n"); | |
e9488d5a DN |
2500 | seq_printf(m, "seconds from last renew: %lld\n", |
2501 | ktime_get_boottime_seconds() - clp->cl_time); | |
169319f1 BF |
2502 | seq_printf(m, "name: "); |
2503 | seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); | |
2504 | seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); | |
79123444 BF |
2505 | if (clp->cl_nii_domain.data) { |
2506 | seq_printf(m, "Implementation domain: "); | |
2507 | seq_quote_mem(m, clp->cl_nii_domain.data, | |
2508 | clp->cl_nii_domain.len); | |
2509 | seq_printf(m, "\nImplementation name: "); | |
2510 | seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); | |
e29f4703 | 2511 | seq_printf(m, "\nImplementation time: [%lld, %ld]\n", |
79123444 BF |
2512 | clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); |
2513 | } | |
3518c866 DW |
2514 | seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state)); |
2515 | seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr); | |
97ad4031 BF |
2516 | drop_client(clp); |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | static int client_info_open(struct inode *inode, struct file *file) | |
2522 | { | |
2523 | return single_open(file, client_info_show, inode); | |
2524 | } | |
2525 | ||
2526 | static const struct file_operations client_info_fops = { | |
2527 | .open = client_info_open, | |
2528 | .read = seq_read, | |
2529 | .llseek = seq_lseek, | |
2530 | .release = single_release, | |
2531 | }; | |
2532 | ||
78599c42 BF |
2533 | static void *states_start(struct seq_file *s, loff_t *pos) |
2534 | __acquires(&clp->cl_lock) | |
2535 | { | |
2536 | struct nfs4_client *clp = s->private; | |
2537 | unsigned long id = *pos; | |
2538 | void *ret; | |
2539 | ||
2540 | spin_lock(&clp->cl_lock); | |
2541 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2542 | *pos = id; | |
2543 | return ret; | |
2544 | } | |
2545 | ||
2546 | static void *states_next(struct seq_file *s, void *v, loff_t *pos) | |
2547 | { | |
2548 | struct nfs4_client *clp = s->private; | |
2549 | unsigned long id = *pos; | |
2550 | void *ret; | |
2551 | ||
2552 | id = *pos; | |
2553 | id++; | |
2554 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2555 | *pos = id; | |
2556 | return ret; | |
2557 | } | |
2558 | ||
2559 | static void states_stop(struct seq_file *s, void *v) | |
2560 | __releases(&clp->cl_lock) | |
2561 | { | |
2562 | struct nfs4_client *clp = s->private; | |
2563 | ||
2564 | spin_unlock(&clp->cl_lock); | |
2565 | } | |
2566 | ||
580da465 AG |
2567 | static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f) |
2568 | { | |
2569 | seq_printf(s, "filename: \"%pD2\"", f->nf_file); | |
2570 | } | |
2571 | ||
fd4f83fd | 2572 | static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) |
78599c42 | 2573 | { |
427f5f83 | 2574 | struct inode *inode = file_inode(f->nf_file); |
78599c42 BF |
2575 | |
2576 | seq_printf(s, "superblock: \"%02x:%02x:%ld\"", | |
2577 | MAJOR(inode->i_sb->s_dev), | |
2578 | MINOR(inode->i_sb->s_dev), | |
2579 | inode->i_ino); | |
2580 | } | |
2581 | ||
2582 | static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) | |
2583 | { | |
2584 | seq_printf(s, "owner: "); | |
2585 | seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); | |
2586 | } | |
2587 | ||
ace7ade4 BF |
2588 | static void nfs4_show_stateid(struct seq_file *s, stateid_t *stid) |
2589 | { | |
ee590d25 BF |
2590 | seq_printf(s, "0x%.8x", stid->si_generation); |
2591 | seq_printf(s, "%12phN", &stid->si_opaque); | |
ace7ade4 BF |
2592 | } |
2593 | ||
78599c42 BF |
2594 | static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) |
2595 | { | |
2596 | struct nfs4_ol_stateid *ols; | |
2597 | struct nfs4_file *nf; | |
fd4f83fd | 2598 | struct nfsd_file *file; |
78599c42 BF |
2599 | struct nfs4_stateowner *oo; |
2600 | unsigned int access, deny; | |
2601 | ||
2602 | if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID) | |
2603 | return 0; /* XXX: or SEQ_SKIP? */ | |
2604 | ols = openlockstateid(st); | |
2605 | oo = ols->st_stateowner; | |
2606 | nf = st->sc_file; | |
2607 | file = find_any_file(nf); | |
9affa435 BF |
2608 | if (!file) |
2609 | return 0; | |
78599c42 | 2610 | |
ace7ade4 BF |
2611 | seq_printf(s, "- "); |
2612 | nfs4_show_stateid(s, &st->sc_stateid); | |
2613 | seq_printf(s, ": { type: open, "); | |
78599c42 BF |
2614 | |
2615 | access = bmap_to_share_mode(ols->st_access_bmap); | |
2616 | deny = bmap_to_share_mode(ols->st_deny_bmap); | |
2617 | ||
c4b77edb | 2618 | seq_printf(s, "access: %s%s, ", |
78599c42 BF |
2619 | access & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2620 | access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
c4b77edb | 2621 | seq_printf(s, "deny: %s%s, ", |
78599c42 BF |
2622 | deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2623 | deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
2624 | ||
2625 | nfs4_show_superblock(s, file); | |
2626 | seq_printf(s, ", "); | |
580da465 AG |
2627 | nfs4_show_fname(s, file); |
2628 | seq_printf(s, ", "); | |
78599c42 BF |
2629 | nfs4_show_owner(s, oo); |
2630 | seq_printf(s, " }\n"); | |
fd4f83fd | 2631 | nfsd_file_put(file); |
16d36e09 BF |
2632 | |
2633 | return 0; | |
2634 | } | |
2635 | ||
2636 | static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) | |
2637 | { | |
2638 | struct nfs4_ol_stateid *ols; | |
2639 | struct nfs4_file *nf; | |
fd4f83fd | 2640 | struct nfsd_file *file; |
16d36e09 BF |
2641 | struct nfs4_stateowner *oo; |
2642 | ||
2643 | ols = openlockstateid(st); | |
2644 | oo = ols->st_stateowner; | |
2645 | nf = st->sc_file; | |
2646 | file = find_any_file(nf); | |
9affa435 BF |
2647 | if (!file) |
2648 | return 0; | |
16d36e09 | 2649 | |
ace7ade4 BF |
2650 | seq_printf(s, "- "); |
2651 | nfs4_show_stateid(s, &st->sc_stateid); | |
2652 | seq_printf(s, ": { type: lock, "); | |
16d36e09 BF |
2653 | |
2654 | /* | |
2655 | * Note: a lock stateid isn't really the same thing as a lock, | |
2656 | * it's the locking state held by one owner on a file, and there | |
2657 | * may be multiple (or no) lock ranges associated with it. | |
2658 | * (Same for the matter is true of open stateids.) | |
2659 | */ | |
78599c42 | 2660 | |
16d36e09 BF |
2661 | nfs4_show_superblock(s, file); |
2662 | /* XXX: open stateid? */ | |
2663 | seq_printf(s, ", "); | |
580da465 AG |
2664 | nfs4_show_fname(s, file); |
2665 | seq_printf(s, ", "); | |
16d36e09 BF |
2666 | nfs4_show_owner(s, oo); |
2667 | seq_printf(s, " }\n"); | |
fd4f83fd | 2668 | nfsd_file_put(file); |
78599c42 BF |
2669 | |
2670 | return 0; | |
2671 | } | |
2672 | ||
16d36e09 BF |
2673 | static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) |
2674 | { | |
2675 | struct nfs4_delegation *ds; | |
2676 | struct nfs4_file *nf; | |
eb82dd39 | 2677 | struct nfsd_file *file; |
16d36e09 BF |
2678 | |
2679 | ds = delegstateid(st); | |
2680 | nf = st->sc_file; | |
9affa435 BF |
2681 | file = find_deleg_file(nf); |
2682 | if (!file) | |
2683 | return 0; | |
16d36e09 | 2684 | |
ace7ade4 BF |
2685 | seq_printf(s, "- "); |
2686 | nfs4_show_stateid(s, &st->sc_stateid); | |
2687 | seq_printf(s, ": { type: deleg, "); | |
16d36e09 BF |
2688 | |
2689 | /* Kinda dead code as long as we only support read delegs: */ | |
2690 | seq_printf(s, "access: %s, ", | |
2691 | ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); | |
2692 | ||
2693 | /* XXX: lease time, whether it's being recalled. */ | |
2694 | ||
2695 | nfs4_show_superblock(s, file); | |
580da465 AG |
2696 | seq_printf(s, ", "); |
2697 | nfs4_show_fname(s, file); | |
16d36e09 | 2698 | seq_printf(s, " }\n"); |
9affa435 | 2699 | nfsd_file_put(file); |
16d36e09 BF |
2700 | |
2701 | return 0; | |
2702 | } | |
2703 | ||
0c4b62b0 BF |
2704 | static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) |
2705 | { | |
2706 | struct nfs4_layout_stateid *ls; | |
eb82dd39 | 2707 | struct nfsd_file *file; |
0c4b62b0 BF |
2708 | |
2709 | ls = container_of(st, struct nfs4_layout_stateid, ls_stid); | |
2710 | file = ls->ls_file; | |
2711 | ||
ace7ade4 BF |
2712 | seq_printf(s, "- "); |
2713 | nfs4_show_stateid(s, &st->sc_stateid); | |
2714 | seq_printf(s, ": { type: layout, "); | |
0c4b62b0 BF |
2715 | |
2716 | /* XXX: What else would be useful? */ | |
2717 | ||
2718 | nfs4_show_superblock(s, file); | |
580da465 AG |
2719 | seq_printf(s, ", "); |
2720 | nfs4_show_fname(s, file); | |
0c4b62b0 BF |
2721 | seq_printf(s, " }\n"); |
2722 | ||
2723 | return 0; | |
2724 | } | |
2725 | ||
78599c42 BF |
2726 | static int states_show(struct seq_file *s, void *v) |
2727 | { | |
2728 | struct nfs4_stid *st = v; | |
2729 | ||
2730 | switch (st->sc_type) { | |
2731 | case NFS4_OPEN_STID: | |
2732 | return nfs4_show_open(s, st); | |
16d36e09 BF |
2733 | case NFS4_LOCK_STID: |
2734 | return nfs4_show_lock(s, st); | |
2735 | case NFS4_DELEG_STID: | |
2736 | return nfs4_show_deleg(s, st); | |
0c4b62b0 BF |
2737 | case NFS4_LAYOUT_STID: |
2738 | return nfs4_show_layout(s, st); | |
78599c42 BF |
2739 | default: |
2740 | return 0; /* XXX: or SEQ_SKIP? */ | |
2741 | } | |
16d36e09 | 2742 | /* XXX: copy stateids? */ |
78599c42 BF |
2743 | } |
2744 | ||
2745 | static struct seq_operations states_seq_ops = { | |
2746 | .start = states_start, | |
2747 | .next = states_next, | |
2748 | .stop = states_stop, | |
2749 | .show = states_show | |
2750 | }; | |
2751 | ||
2752 | static int client_states_open(struct inode *inode, struct file *file) | |
2753 | { | |
78599c42 BF |
2754 | struct seq_file *s; |
2755 | struct nfs4_client *clp; | |
2756 | int ret; | |
2757 | ||
a204f25e BF |
2758 | clp = get_nfsdfs_clp(inode); |
2759 | if (!clp) | |
78599c42 | 2760 | return -ENXIO; |
78599c42 BF |
2761 | |
2762 | ret = seq_open(file, &states_seq_ops); | |
2763 | if (ret) | |
2764 | return ret; | |
2765 | s = file->private_data; | |
2766 | s->private = clp; | |
2767 | return 0; | |
2768 | } | |
2769 | ||
2770 | static int client_opens_release(struct inode *inode, struct file *file) | |
2771 | { | |
2772 | struct seq_file *m = file->private_data; | |
2773 | struct nfs4_client *clp = m->private; | |
2774 | ||
2775 | /* XXX: alternatively, we could get/drop in seq start/stop */ | |
2776 | drop_client(clp); | |
2777 | return 0; | |
2778 | } | |
2779 | ||
2780 | static const struct file_operations client_states_fops = { | |
2781 | .open = client_states_open, | |
2782 | .read = seq_read, | |
2783 | .llseek = seq_lseek, | |
2784 | .release = client_opens_release, | |
2785 | }; | |
2786 | ||
89c905be BF |
2787 | /* |
2788 | * Normally we refuse to destroy clients that are in use, but here the | |
2789 | * administrator is telling us to just do it. We also want to wait | |
2790 | * so the caller has a guarantee that the client's locks are gone by | |
2791 | * the time the write returns: | |
2792 | */ | |
297e57a2 | 2793 | static void force_expire_client(struct nfs4_client *clp) |
89c905be BF |
2794 | { |
2795 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2796 | bool already_expired; | |
2797 | ||
2958d2ee CL |
2798 | trace_nfsd_clid_admin_expired(&clp->cl_clientid); |
2799 | ||
f7104cc1 | 2800 | spin_lock(&nn->client_lock); |
89c905be | 2801 | clp->cl_time = 0; |
f7104cc1 | 2802 | spin_unlock(&nn->client_lock); |
89c905be BF |
2803 | |
2804 | wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); | |
2805 | spin_lock(&nn->client_lock); | |
2806 | already_expired = list_empty(&clp->cl_lru); | |
2807 | if (!already_expired) | |
2808 | unhash_client_locked(clp); | |
2809 | spin_unlock(&nn->client_lock); | |
2810 | ||
2811 | if (!already_expired) | |
2812 | expire_client(clp); | |
2813 | else | |
2814 | wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); | |
2815 | } | |
2816 | ||
2817 | static ssize_t client_ctl_write(struct file *file, const char __user *buf, | |
2818 | size_t size, loff_t *pos) | |
2819 | { | |
2820 | char *data; | |
2821 | struct nfs4_client *clp; | |
2822 | ||
2823 | data = simple_transaction_get(file, buf, size); | |
2824 | if (IS_ERR(data)) | |
2825 | return PTR_ERR(data); | |
2826 | if (size != 7 || 0 != memcmp(data, "expire\n", 7)) | |
2827 | return -EINVAL; | |
2828 | clp = get_nfsdfs_clp(file_inode(file)); | |
2829 | if (!clp) | |
2830 | return -ENXIO; | |
2831 | force_expire_client(clp); | |
2832 | drop_client(clp); | |
2833 | return 7; | |
2834 | } | |
2835 | ||
2836 | static const struct file_operations client_ctl_fops = { | |
2837 | .write = client_ctl_write, | |
2838 | .release = simple_transaction_release, | |
2839 | }; | |
2840 | ||
97ad4031 BF |
2841 | static const struct tree_descr client_files[] = { |
2842 | [0] = {"info", &client_info_fops, S_IRUSR}, | |
78599c42 | 2843 | [1] = {"states", &client_states_fops, S_IRUSR}, |
6cbfad5f | 2844 | [2] = {"ctl", &client_ctl_fops, S_IWUSR}, |
78599c42 | 2845 | [3] = {""}, |
97ad4031 BF |
2846 | }; |
2847 | ||
2216d449 | 2848 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2849 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2850 | { | |
2851 | struct nfs4_client *clp; | |
2852 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2853 | int ret; |
c212cecf | 2854 | struct net *net = SVC_NET(rqstp); |
e8a79fb1 | 2855 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
472d155a | 2856 | struct dentry *dentries[ARRAY_SIZE(client_files)]; |
b09333c4 | 2857 | |
0926c395 | 2858 | clp = alloc_client(name, nn); |
b09333c4 RL |
2859 | if (clp == NULL) |
2860 | return NULL; | |
2861 | ||
03a4e1f6 BF |
2862 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2863 | if (ret) { | |
03a4e1f6 | 2864 | free_client(clp); |
03a4e1f6 | 2865 | return NULL; |
b09333c4 | 2866 | } |
e8a79fb1 BF |
2867 | gen_clid(clp, nn); |
2868 | kref_init(&clp->cl_nfsdfs.cl_ref); | |
0162ac2b | 2869 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
20b7d86f | 2870 | clp->cl_time = ktime_get_boottime_seconds(); |
b09333c4 | 2871 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 | 2872 | copy_verf(clp, verf); |
3bade247 | 2873 | memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); |
edd76786 | 2874 | clp->cl_cb_session = NULL; |
c212cecf | 2875 | clp->net = net; |
472d155a N |
2876 | clp->cl_nfsd_dentry = nfsd_client_mkdir( |
2877 | nn, &clp->cl_nfsdfs, | |
2878 | clp->cl_clientid.cl_id - nn->clientid_base, | |
2879 | client_files, dentries); | |
2880 | clp->cl_nfsd_info_dentry = dentries[0]; | |
e8a79fb1 BF |
2881 | if (!clp->cl_nfsd_dentry) { |
2882 | free_client(clp); | |
2883 | return NULL; | |
2884 | } | |
b09333c4 RL |
2885 | return clp; |
2886 | } | |
2887 | ||
fd39ca9a | 2888 | static void |
ac55fdc4 JL |
2889 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2890 | { | |
2891 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2892 | struct nfs4_client *clp; | |
2893 | ||
2894 | while (*new) { | |
2895 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2896 | parent = *new; | |
2897 | ||
2898 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2899 | new = &((*new)->rb_left); | |
2900 | else | |
2901 | new = &((*new)->rb_right); | |
2902 | } | |
2903 | ||
2904 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2905 | rb_insert_color(&new_clp->cl_namenode, root); | |
2906 | } | |
2907 | ||
2908 | static struct nfs4_client * | |
2909 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2910 | { | |
ef17af2a | 2911 | int cmp; |
ac55fdc4 JL |
2912 | struct rb_node *node = root->rb_node; |
2913 | struct nfs4_client *clp; | |
2914 | ||
2915 | while (node) { | |
2916 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2917 | cmp = compare_blob(&clp->cl_name, name); | |
2918 | if (cmp > 0) | |
2919 | node = node->rb_left; | |
2920 | else if (cmp < 0) | |
2921 | node = node->rb_right; | |
2922 | else | |
2923 | return clp; | |
2924 | } | |
2925 | return NULL; | |
2926 | } | |
2927 | ||
2928 | static void | |
2929 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2930 | { |
2931 | unsigned int idhashval; | |
0a7ec377 | 2932 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2933 | |
0a880a28 TM |
2934 | lockdep_assert_held(&nn->client_lock); |
2935 | ||
ac55fdc4 | 2936 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2937 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2938 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2939 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2940 | renew_client_locked(clp); |
1da177e4 LT |
2941 | } |
2942 | ||
fd39ca9a | 2943 | static void |
1da177e4 LT |
2944 | move_to_confirmed(struct nfs4_client *clp) |
2945 | { | |
2946 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2947 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2948 | |
0a880a28 TM |
2949 | lockdep_assert_held(&nn->client_lock); |
2950 | ||
8daae4dc | 2951 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2952 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2953 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
934bd07f BF |
2954 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
2955 | trace_nfsd_clid_confirmed(&clp->cl_clientid); | |
3dbacee6 | 2956 | renew_client_locked(clp); |
1da177e4 LT |
2957 | } |
2958 | ||
2959 | static struct nfs4_client * | |
bfa85e83 | 2960 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2961 | { |
2962 | struct nfs4_client *clp; | |
2963 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2964 | ||
bfa85e83 | 2965 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2966 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2967 | if ((bool)clp->cl_minorversion != sessions) |
2968 | return NULL; | |
3dbacee6 | 2969 | renew_client_locked(clp); |
1da177e4 | 2970 | return clp; |
a50d2ad1 | 2971 | } |
1da177e4 LT |
2972 | } |
2973 | return NULL; | |
2974 | } | |
2975 | ||
bfa85e83 BF |
2976 | static struct nfs4_client * |
2977 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2978 | { | |
2979 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2980 | ||
0a880a28 | 2981 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2982 | return find_client_in_id_table(tbl, clid, sessions); |
2983 | } | |
2984 | ||
1da177e4 | 2985 | static struct nfs4_client * |
0a7ec377 | 2986 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2987 | { |
bfa85e83 | 2988 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2989 | |
0a880a28 | 2990 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2991 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2992 | } |
2993 | ||
6e5f15c9 | 2994 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2995 | { |
6e5f15c9 | 2996 | return clp->cl_exchange_flags != 0; |
e203d506 | 2997 | } |
a1bcecd2 | 2998 | |
28ce6054 | 2999 | static struct nfs4_client * |
382a62e7 | 3000 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3001 | { |
0a880a28 | 3002 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 3003 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
3004 | } |
3005 | ||
3006 | static struct nfs4_client * | |
a99454aa | 3007 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 3008 | { |
0a880a28 | 3009 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 3010 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
3011 | } |
3012 | ||
fd39ca9a | 3013 | static void |
6f3d772f | 3014 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 3015 | { |
07263f1e | 3016 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
3017 | struct sockaddr *sa = svc_addr(rqstp); |
3018 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
3019 | unsigned short expected_family; |
3020 | ||
3021 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
3022 | if (se->se_callback_netid_len == 3 && | |
3023 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
3024 | expected_family = AF_INET; | |
3025 | else if (se->se_callback_netid_len == 4 && | |
3026 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
3027 | expected_family = AF_INET6; | |
3028 | else | |
1da177e4 LT |
3029 | goto out_err; |
3030 | ||
c212cecf | 3031 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 3032 | se->se_callback_addr_len, |
07263f1e BF |
3033 | (struct sockaddr *)&conn->cb_addr, |
3034 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 3035 | |
07263f1e | 3036 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 3037 | goto out_err; |
aa9a4ec7 | 3038 | |
07263f1e BF |
3039 | if (conn->cb_addr.ss_family == AF_INET6) |
3040 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 3041 | |
07263f1e BF |
3042 | conn->cb_prog = se->se_callback_prog; |
3043 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 3044 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1eace0d1 | 3045 | trace_nfsd_cb_args(clp, conn); |
1da177e4 LT |
3046 | return; |
3047 | out_err: | |
07263f1e BF |
3048 | conn->cb_addr.ss_family = AF_UNSPEC; |
3049 | conn->cb_addrlen = 0; | |
1eace0d1 | 3050 | trace_nfsd_cb_nodelegs(clp); |
1da177e4 LT |
3051 | return; |
3052 | } | |
3053 | ||
074fe897 | 3054 | /* |
067e1ace | 3055 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 3056 | */ |
b607664e | 3057 | static void |
074fe897 | 3058 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 3059 | { |
bddfdbcd | 3060 | struct xdr_buf *buf = resp->xdr->buf; |
557ce264 AA |
3061 | struct nfsd4_slot *slot = resp->cstate.slot; |
3062 | unsigned int base; | |
074fe897 | 3063 | |
557ce264 | 3064 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3065 | |
085def3a | 3066 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
3067 | slot->sl_opcnt = resp->opcnt; |
3068 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
3069 | free_svc_cred(&slot->sl_cred); |
3070 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 3071 | |
085def3a BF |
3072 | if (!nfsd4_cache_this(resp)) { |
3073 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 3074 | return; |
074fe897 | 3075 | } |
085def3a BF |
3076 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
3077 | ||
f5236013 BF |
3078 | base = resp->cstate.data_offset; |
3079 | slot->sl_datalen = buf->len - base; | |
3080 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
3081 | WARN(1, "%s: sessions DRC could not cache compound\n", |
3082 | __func__); | |
557ce264 | 3083 | return; |
074fe897 AA |
3084 | } |
3085 | ||
3086 | /* | |
abfabf8c AA |
3087 | * Encode the replay sequence operation from the slot values. |
3088 | * If cachethis is FALSE encode the uncached rep error on the next | |
3089 | * operation which sets resp->p and increments resp->opcnt for | |
3090 | * nfs4svc_encode_compoundres. | |
074fe897 | 3091 | * |
074fe897 | 3092 | */ |
abfabf8c AA |
3093 | static __be32 |
3094 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
3095 | struct nfsd4_compoundres *resp) | |
074fe897 | 3096 | { |
abfabf8c AA |
3097 | struct nfsd4_op *op; |
3098 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 3099 | |
abfabf8c AA |
3100 | /* Encode the replayed sequence operation */ |
3101 | op = &args->ops[resp->opcnt - 1]; | |
3102 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 3103 | |
085def3a BF |
3104 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
3105 | return op->status; | |
3106 | if (args->opcnt == 1) { | |
3107 | /* | |
3108 | * The original operation wasn't a solo sequence--we | |
3109 | * always cache those--so this retry must not match the | |
3110 | * original: | |
3111 | */ | |
3112 | op->status = nfserr_seq_false_retry; | |
3113 | } else { | |
abfabf8c AA |
3114 | op = &args->ops[resp->opcnt++]; |
3115 | op->status = nfserr_retry_uncached_rep; | |
3116 | nfsd4_encode_operation(resp, op); | |
074fe897 | 3117 | } |
abfabf8c | 3118 | return op->status; |
074fe897 AA |
3119 | } |
3120 | ||
3121 | /* | |
557ce264 AA |
3122 | * The sequence operation is not cached because we can use the slot and |
3123 | * session values. | |
074fe897 | 3124 | */ |
3ca2eb98 | 3125 | static __be32 |
bf864a31 AA |
3126 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
3127 | struct nfsd4_sequence *seq) | |
074fe897 | 3128 | { |
557ce264 | 3129 | struct nfsd4_slot *slot = resp->cstate.slot; |
bddfdbcd | 3130 | struct xdr_stream *xdr = resp->xdr; |
f5236013 | 3131 | __be32 *p; |
074fe897 AA |
3132 | __be32 status; |
3133 | ||
557ce264 | 3134 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 3135 | |
abfabf8c | 3136 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 3137 | if (status) |
abfabf8c | 3138 | return status; |
074fe897 | 3139 | |
f5236013 BF |
3140 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
3141 | if (!p) { | |
3142 | WARN_ON_ONCE(1); | |
3143 | return nfserr_serverfault; | |
3144 | } | |
3145 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
3146 | xdr_commit_encode(xdr); | |
074fe897 | 3147 | |
557ce264 | 3148 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 3149 | return slot->sl_status; |
074fe897 AA |
3150 | } |
3151 | ||
0733d213 AA |
3152 | /* |
3153 | * Set the exchange_id flags returned by the server. | |
3154 | */ | |
3155 | static void | |
3156 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
3157 | { | |
9cf514cc CH |
3158 | #ifdef CONFIG_NFSD_PNFS |
3159 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
3160 | #else | |
0733d213 | 3161 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 3162 | #endif |
0733d213 AA |
3163 | |
3164 | /* Referrals are supported, Migration is not. */ | |
3165 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
3166 | ||
3167 | /* set the wire flags to return to client. */ | |
3168 | clid->flags = new->cl_exchange_flags; | |
3169 | } | |
3170 | ||
4eaea134 BF |
3171 | static bool client_has_openowners(struct nfs4_client *clp) |
3172 | { | |
3173 | struct nfs4_openowner *oo; | |
3174 | ||
3175 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
3176 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
3177 | return true; | |
3178 | } | |
3179 | return false; | |
3180 | } | |
3181 | ||
631fc9ea BF |
3182 | static bool client_has_state(struct nfs4_client *clp) |
3183 | { | |
4eaea134 | 3184 | return client_has_openowners(clp) |
47e970be KM |
3185 | #ifdef CONFIG_NFSD_PNFS |
3186 | || !list_empty(&clp->cl_lo_states) | |
3187 | #endif | |
6eccece9 | 3188 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
3189 | || !list_empty(&clp->cl_sessions) |
3190 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
3191 | } |
3192 | ||
79123444 BF |
3193 | static __be32 copy_impl_id(struct nfs4_client *clp, |
3194 | struct nfsd4_exchange_id *exid) | |
3195 | { | |
3196 | if (!exid->nii_domain.data) | |
3197 | return 0; | |
3198 | xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); | |
3199 | if (!clp->cl_nii_domain.data) | |
3200 | return nfserr_jukebox; | |
3201 | xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); | |
3202 | if (!clp->cl_nii_name.data) | |
3203 | return nfserr_jukebox; | |
e29f4703 | 3204 | clp->cl_nii_time = exid->nii_time; |
79123444 BF |
3205 | return 0; |
3206 | } | |
3207 | ||
069b6ad4 | 3208 | __be32 |
eb69853d CH |
3209 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3210 | union nfsd4_op_u *u) | |
069b6ad4 | 3211 | { |
eb69853d | 3212 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
3213 | struct nfs4_client *conf, *new; |
3214 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 3215 | __be32 status; |
363168b4 | 3216 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 3217 | nfs4_verifier verf = exid->verifier; |
363168b4 | 3218 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 3219 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 3220 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 3221 | |
363168b4 | 3222 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 3223 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
523ec6ed | 3224 | "ip_addr=%s flags %x, spa_how %u\n", |
0733d213 | 3225 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 3226 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 3227 | |
a084daf5 | 3228 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
3229 | return nfserr_inval; |
3230 | ||
50c7b948 BF |
3231 | new = create_client(exid->clname, rqstp, &verf); |
3232 | if (new == NULL) | |
3233 | return nfserr_jukebox; | |
79123444 BF |
3234 | status = copy_impl_id(new, exid); |
3235 | if (status) | |
3236 | goto out_nolock; | |
50c7b948 | 3237 | |
0733d213 | 3238 | switch (exid->spa_how) { |
57266a6e | 3239 | case SP4_MACH_CRED: |
ed941643 AE |
3240 | exid->spo_must_enforce[0] = 0; |
3241 | exid->spo_must_enforce[1] = ( | |
3242 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3243 | 1 << (OP_EXCHANGE_ID - 32) | | |
3244 | 1 << (OP_CREATE_SESSION - 32) | | |
3245 | 1 << (OP_DESTROY_SESSION - 32) | | |
3246 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
3247 | ||
3248 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
3249 | 1 << (OP_OPEN_DOWNGRADE) | | |
3250 | 1 << (OP_LOCKU) | | |
3251 | 1 << (OP_DELEGRETURN)); | |
3252 | ||
3253 | exid->spo_must_allow[1] &= ( | |
3254 | 1 << (OP_TEST_STATEID - 32) | | |
3255 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
3256 | if (!svc_rqst_integrity_protected(rqstp)) { |
3257 | status = nfserr_inval; | |
3258 | goto out_nolock; | |
920dd9bb BF |
3259 | } |
3260 | /* | |
3261 | * Sometimes userspace doesn't give us a principal. | |
3262 | * Which is a bug, really. Anyway, we can't enforce | |
3263 | * MACH_CRED in that case, better to give up now: | |
3264 | */ | |
414ca017 BF |
3265 | if (!new->cl_cred.cr_principal && |
3266 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
3267 | status = nfserr_serverfault; |
3268 | goto out_nolock; | |
50c7b948 BF |
3269 | } |
3270 | new->cl_mach_cred = true; | |
76c50eb7 | 3271 | break; |
0733d213 AA |
3272 | case SP4_NONE: |
3273 | break; | |
063b0fb9 BF |
3274 | default: /* checked by xdr code */ |
3275 | WARN_ON_ONCE(1); | |
df561f66 | 3276 | fallthrough; |
0733d213 | 3277 | case SP4_SSV: |
8edf4b02 KM |
3278 | status = nfserr_encr_alg_unsupp; |
3279 | goto out_nolock; | |
0733d213 AA |
3280 | } |
3281 | ||
2dbb269d | 3282 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 3283 | spin_lock(&nn->client_lock); |
382a62e7 | 3284 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 3285 | if (conf) { |
83e08fd4 BF |
3286 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
3287 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
3288 | ||
136e658d BF |
3289 | if (update) { |
3290 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 3291 | status = nfserr_inval; |
1a308118 BF |
3292 | goto out; |
3293 | } | |
dedeb13f | 3294 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
3295 | status = nfserr_wrong_cred; |
3296 | goto out; | |
3297 | } | |
136e658d | 3298 | if (!creds_match) { /* case 9 */ |
ea236d07 | 3299 | status = nfserr_perm; |
136e658d BF |
3300 | goto out; |
3301 | } | |
3302 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
3303 | status = nfserr_not_same; |
3304 | goto out; | |
3305 | } | |
136e658d BF |
3306 | /* case 6 */ |
3307 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
e8f80c55 | 3308 | trace_nfsd_clid_confirmed_r(conf); |
136e658d | 3309 | goto out_copy; |
0733d213 | 3310 | } |
136e658d | 3311 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
3312 | if (client_has_state(conf)) { |
3313 | status = nfserr_clid_inuse; | |
27787733 | 3314 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
0733d213 AA |
3315 | goto out; |
3316 | } | |
0733d213 AA |
3317 | goto out_new; |
3318 | } | |
136e658d | 3319 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 3320 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
e8f80c55 | 3321 | trace_nfsd_clid_confirmed_r(conf); |
136e658d BF |
3322 | goto out_copy; |
3323 | } | |
3324 | /* case 5, client reboot */ | |
744ea54c | 3325 | trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf); |
3dbacee6 | 3326 | conf = NULL; |
136e658d | 3327 | goto out_new; |
6ddbbbfe MS |
3328 | } |
3329 | ||
2dbb269d | 3330 | if (update) { /* case 7 */ |
6ddbbbfe MS |
3331 | status = nfserr_noent; |
3332 | goto out; | |
0733d213 AA |
3333 | } |
3334 | ||
e8f80c55 | 3335 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 3336 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 3337 | unhash_client_locked(unconf); |
0733d213 | 3338 | |
e8f80c55 CL |
3339 | /* case 1, new owner ID */ |
3340 | trace_nfsd_clid_fresh(new); | |
3341 | ||
0733d213 | 3342 | out_new: |
fd699b8a JL |
3343 | if (conf) { |
3344 | status = mark_client_expired_locked(conf); | |
3345 | if (status) | |
3346 | goto out; | |
2958d2ee | 3347 | trace_nfsd_clid_replaced(&conf->cl_clientid); |
fd699b8a | 3348 | } |
4f540e29 | 3349 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
3350 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
3351 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 3352 | |
ac55fdc4 | 3353 | add_to_unconfirmed(new); |
3dbacee6 | 3354 | swap(new, conf); |
0733d213 | 3355 | out_copy: |
5cc40fd7 TM |
3356 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
3357 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 3358 | |
5cc40fd7 TM |
3359 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
3360 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
3361 | |
3362 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 3363 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
3364 | status = nfs_ok; |
3365 | ||
3366 | out: | |
3dbacee6 | 3367 | spin_unlock(&nn->client_lock); |
50c7b948 | 3368 | out_nolock: |
5cc40fd7 | 3369 | if (new) |
3dbacee6 | 3370 | expire_client(new); |
e8f80c55 CL |
3371 | if (unconf) { |
3372 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 3373 | expire_client(unconf); |
e8f80c55 | 3374 | } |
0733d213 | 3375 | return status; |
069b6ad4 AA |
3376 | } |
3377 | ||
57b7b43b | 3378 | static __be32 |
88e588d5 | 3379 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 3380 | { |
88e588d5 AA |
3381 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
3382 | slot_seqid); | |
b85d4c01 BH |
3383 | |
3384 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
3385 | if (slot_inuse) { |
3386 | if (seqid == slot_seqid) | |
b85d4c01 BH |
3387 | return nfserr_jukebox; |
3388 | else | |
3389 | return nfserr_seq_misordered; | |
3390 | } | |
f6d82485 | 3391 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 3392 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 3393 | return nfs_ok; |
88e588d5 | 3394 | if (seqid == slot_seqid) |
b85d4c01 | 3395 | return nfserr_replay_cache; |
b85d4c01 BH |
3396 | return nfserr_seq_misordered; |
3397 | } | |
3398 | ||
49557cc7 AA |
3399 | /* |
3400 | * Cache the create session result into the create session single DRC | |
3401 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
3402 | * Do this for solo or embedded create session operations. | |
3403 | */ | |
3404 | static void | |
3405 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 3406 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
3407 | { |
3408 | slot->sl_status = nfserr; | |
3409 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
3410 | } | |
3411 | ||
3412 | static __be32 | |
3413 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
3414 | struct nfsd4_clid_slot *slot) | |
3415 | { | |
3416 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
3417 | return slot->sl_status; | |
3418 | } | |
3419 | ||
1b74c25b MJ |
3420 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
3421 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
3422 | 1 + /* MIN tag is length with zero, only length */ \ | |
3423 | 3 + /* version, opcount, opcode */ \ | |
3424 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3425 | /* seqid, slotID, slotID, cache */ \ | |
3426 | 4 ) * sizeof(__be32)) | |
3427 | ||
3428 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
3429 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
3430 | 1 + /* status */ \ | |
3431 | 1 + /* MIN tag is length with zero, only length */ \ | |
3432 | 3 + /* opcount, opcode, opstatus*/ \ | |
3433 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3434 | /* seqid, slotID, slotID, slotID, status */ \ | |
3435 | 5 ) * sizeof(__be32)) | |
3436 | ||
55c760cf | 3437 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 3438 | { |
55c760cf BF |
3439 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
3440 | ||
373cd409 BF |
3441 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
3442 | return nfserr_toosmall; | |
3443 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
3444 | return nfserr_toosmall; | |
55c760cf BF |
3445 | ca->headerpadsz = 0; |
3446 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
3447 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
3448 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
3449 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
3450 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
3451 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
3452 | /* | |
3453 | * Note decreasing slot size below client's request may make it | |
3454 | * difficult for client to function correctly, whereas | |
3455 | * decreasing the number of slots will (just?) affect | |
3456 | * performance. When short on memory we therefore prefer to | |
3457 | * decrease number of slots instead of their size. Clients that | |
3458 | * request larger slots than they need will get poor results: | |
7f49fd5d N |
3459 | * Note that we always allow at least one slot, because our |
3460 | * accounting is soft and provides no guarantees either way. | |
55c760cf | 3461 | */ |
2030ca56 | 3462 | ca->maxreqs = nfsd4_get_drc_mem(ca, nn); |
55c760cf | 3463 | |
373cd409 | 3464 | return nfs_ok; |
1b74c25b MJ |
3465 | } |
3466 | ||
4500632f CL |
3467 | /* |
3468 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
3469 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
3470 | */ | |
3471 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
3472 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
3473 | ||
3474 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
3475 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
3476 | ||
8a891633 | 3477 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 3478 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 3479 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
3480 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
3481 | sizeof(__be32)) | |
8a891633 | 3482 | |
06b332a5 | 3483 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 3484 | { |
06b332a5 BF |
3485 | ca->headerpadsz = 0; |
3486 | ||
8a891633 | 3487 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 3488 | return nfserr_toosmall; |
8a891633 | 3489 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
3490 | return nfserr_toosmall; |
3491 | ca->maxresp_cached = 0; | |
3492 | if (ca->maxops < 2) | |
3493 | return nfserr_toosmall; | |
3494 | ||
3495 | return nfs_ok; | |
1b74c25b MJ |
3496 | } |
3497 | ||
b78724b7 BF |
3498 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
3499 | { | |
3500 | switch (cbs->flavor) { | |
3501 | case RPC_AUTH_NULL: | |
3502 | case RPC_AUTH_UNIX: | |
3503 | return nfs_ok; | |
3504 | default: | |
3505 | /* | |
3506 | * GSS case: the spec doesn't allow us to return this | |
3507 | * error. But it also doesn't allow us not to support | |
3508 | * GSS. | |
3509 | * I'd rather this fail hard than return some error the | |
3510 | * client might think it can already handle: | |
3511 | */ | |
3512 | return nfserr_encr_alg_unsupp; | |
3513 | } | |
3514 | } | |
3515 | ||
069b6ad4 AA |
3516 | __be32 |
3517 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 3518 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 3519 | { |
eb69853d | 3520 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 3521 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 3522 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3523 | struct nfs4_client *old = NULL; |
ac7c46f2 | 3524 | struct nfsd4_session *new; |
81f0b2a4 | 3525 | struct nfsd4_conn *conn; |
49557cc7 | 3526 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 3527 | __be32 status = 0; |
8daae4dc | 3528 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 3529 | |
a62573dc MJ |
3530 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
3531 | return nfserr_inval; | |
b78724b7 BF |
3532 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
3533 | if (status) | |
3534 | return status; | |
55c760cf | 3535 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
3536 | if (status) |
3537 | return status; | |
3538 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 3539 | if (status) |
f403e450 | 3540 | goto out_release_drc_mem; |
81f0b2a4 | 3541 | status = nfserr_jukebox; |
60810e54 | 3542 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
3543 | if (!new) |
3544 | goto out_release_drc_mem; | |
81f0b2a4 BF |
3545 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
3546 | if (!conn) | |
3547 | goto out_free_session; | |
a62573dc | 3548 | |
d20c11d8 | 3549 | spin_lock(&nn->client_lock); |
0a7ec377 | 3550 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 3551 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 3552 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
3553 | |
3554 | if (conf) { | |
57266a6e | 3555 | status = nfserr_wrong_cred; |
dedeb13f | 3556 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 3557 | goto out_free_conn; |
49557cc7 AA |
3558 | cs_slot = &conf->cl_cs_slot; |
3559 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
3560 | if (status) { |
3561 | if (status == nfserr_replay_cache) | |
3562 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 3563 | goto out_free_conn; |
ec6b5d7b | 3564 | } |
ec6b5d7b | 3565 | } else if (unconf) { |
27787733 | 3566 | status = nfserr_clid_inuse; |
ec6b5d7b | 3567 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
363168b4 | 3568 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
27787733 | 3569 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); |
81f0b2a4 | 3570 | goto out_free_conn; |
ec6b5d7b | 3571 | } |
57266a6e | 3572 | status = nfserr_wrong_cred; |
dedeb13f | 3573 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 3574 | goto out_free_conn; |
49557cc7 AA |
3575 | cs_slot = &unconf->cl_cs_slot; |
3576 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
3577 | if (status) { |
3578 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 3579 | status = nfserr_seq_misordered; |
81f0b2a4 | 3580 | goto out_free_conn; |
ec6b5d7b | 3581 | } |
382a62e7 | 3582 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 3583 | if (old) { |
d20c11d8 | 3584 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3585 | if (status) { |
3586 | old = NULL; | |
221a6876 | 3587 | goto out_free_conn; |
7abea1e8 | 3588 | } |
2958d2ee | 3589 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 3590 | } |
8f9d3d3b | 3591 | move_to_confirmed(unconf); |
ec6b5d7b AA |
3592 | conf = unconf; |
3593 | } else { | |
3594 | status = nfserr_stale_clientid; | |
81f0b2a4 | 3595 | goto out_free_conn; |
ec6b5d7b | 3596 | } |
81f0b2a4 | 3597 | status = nfs_ok; |
4ce85c8c | 3598 | /* Persistent sessions are not supported */ |
408b79bc | 3599 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 3600 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
3601 | cr_ses->flags &= ~SESSION4_RDMA; |
3602 | ||
81f0b2a4 | 3603 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 3604 | nfsd4_get_session_locked(new); |
81f0b2a4 | 3605 | |
ac7c46f2 | 3606 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 3607 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 3608 | cs_slot->sl_seqid++; |
49557cc7 | 3609 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 3610 | |
d20c11d8 | 3611 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 3612 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 | 3613 | spin_unlock(&nn->client_lock); |
934bd07f BF |
3614 | if (conf == unconf) |
3615 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
3616 | /* init connection and backchannel */ |
3617 | nfsd4_init_conn(rqstp, conn, new); | |
3618 | nfsd4_put_session(new); | |
d20c11d8 JL |
3619 | if (old) |
3620 | expire_client(old); | |
ec6b5d7b | 3621 | return status; |
81f0b2a4 | 3622 | out_free_conn: |
d20c11d8 | 3623 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 3624 | free_conn(conn); |
d20c11d8 JL |
3625 | if (old) |
3626 | expire_client(old); | |
81f0b2a4 BF |
3627 | out_free_session: |
3628 | __free_session(new); | |
55c760cf BF |
3629 | out_release_drc_mem: |
3630 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 3631 | return status; |
069b6ad4 AA |
3632 | } |
3633 | ||
1d1bc8f2 BF |
3634 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
3635 | { | |
3636 | switch (*dir) { | |
3637 | case NFS4_CDFC4_FORE: | |
3638 | case NFS4_CDFC4_BACK: | |
3639 | return nfs_ok; | |
3640 | case NFS4_CDFC4_FORE_OR_BOTH: | |
3641 | case NFS4_CDFC4_BACK_OR_BOTH: | |
3642 | *dir = NFS4_CDFC4_BOTH; | |
3643 | return nfs_ok; | |
fc5fc5d7 | 3644 | } |
1d1bc8f2 BF |
3645 | return nfserr_inval; |
3646 | } | |
3647 | ||
eb69853d CH |
3648 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
3649 | struct nfsd4_compound_state *cstate, | |
3650 | union nfsd4_op_u *u) | |
cb73a9f4 | 3651 | { |
eb69853d | 3652 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 3653 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 3654 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 3655 | __be32 status; |
cb73a9f4 | 3656 | |
b78724b7 BF |
3657 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
3658 | if (status) | |
3659 | return status; | |
c9a49628 | 3660 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
3661 | session->se_cb_prog = bc->bc_cb_program; |
3662 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 3663 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
3664 | |
3665 | nfsd4_probe_callback(session->se_client); | |
3666 | ||
3667 | return nfs_ok; | |
3668 | } | |
3669 | ||
c2d715a1 BF |
3670 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
3671 | { | |
3672 | struct nfsd4_conn *c; | |
3673 | ||
3674 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
3675 | if (c->cn_xprt == xpt) { | |
3676 | return c; | |
3677 | } | |
3678 | } | |
3679 | return NULL; | |
3680 | } | |
3681 | ||
3682 | static __be32 nfsd4_match_existing_connection(struct svc_rqst *rqst, | |
02579b2f | 3683 | struct nfsd4_session *session, u32 req, struct nfsd4_conn **conn) |
c2d715a1 BF |
3684 | { |
3685 | struct nfs4_client *clp = session->se_client; | |
3686 | struct svc_xprt *xpt = rqst->rq_xprt; | |
3687 | struct nfsd4_conn *c; | |
3688 | __be32 status; | |
3689 | ||
3690 | /* Following the last paragraph of RFC 5661 Section 18.34.3: */ | |
3691 | spin_lock(&clp->cl_lock); | |
3692 | c = __nfsd4_find_conn(xpt, session); | |
3693 | if (!c) | |
3694 | status = nfserr_noent; | |
3695 | else if (req == c->cn_flags) | |
3696 | status = nfs_ok; | |
3697 | else if (req == NFS4_CDFC4_FORE_OR_BOTH && | |
3698 | c->cn_flags != NFS4_CDFC4_BACK) | |
3699 | status = nfs_ok; | |
3700 | else if (req == NFS4_CDFC4_BACK_OR_BOTH && | |
3701 | c->cn_flags != NFS4_CDFC4_FORE) | |
3702 | status = nfs_ok; | |
3703 | else | |
3704 | status = nfserr_inval; | |
3705 | spin_unlock(&clp->cl_lock); | |
02579b2f DN |
3706 | if (status == nfs_ok && conn) |
3707 | *conn = c; | |
c2d715a1 BF |
3708 | return status; |
3709 | } | |
3710 | ||
1d1bc8f2 BF |
3711 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
3712 | struct nfsd4_compound_state *cstate, | |
eb69853d | 3713 | union nfsd4_op_u *u) |
1d1bc8f2 | 3714 | { |
eb69853d | 3715 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 3716 | __be32 status; |
3ba63671 | 3717 | struct nfsd4_conn *conn; |
4f6e6c17 | 3718 | struct nfsd4_session *session; |
d4e19e70 TM |
3719 | struct net *net = SVC_NET(rqstp); |
3720 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
3721 | |
3722 | if (!nfsd4_last_compound_op(rqstp)) | |
3723 | return nfserr_not_only_op; | |
c9a49628 | 3724 | spin_lock(&nn->client_lock); |
d4e19e70 | 3725 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 3726 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 3727 | if (!session) |
d4e19e70 | 3728 | goto out_no_session; |
57266a6e | 3729 | status = nfserr_wrong_cred; |
dedeb13f | 3730 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 3731 | goto out; |
02579b2f DN |
3732 | status = nfsd4_match_existing_connection(rqstp, session, |
3733 | bcts->dir, &conn); | |
3734 | if (status == nfs_ok) { | |
3735 | if (bcts->dir == NFS4_CDFC4_FORE_OR_BOTH || | |
3736 | bcts->dir == NFS4_CDFC4_BACK) | |
3737 | conn->cn_flags |= NFS4_CDFC4_BACK; | |
3738 | nfsd4_probe_callback(session->se_client); | |
3739 | goto out; | |
3740 | } | |
3741 | if (status == nfserr_inval) | |
c2d715a1 | 3742 | goto out; |
1d1bc8f2 | 3743 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 3744 | if (status) |
4f6e6c17 | 3745 | goto out; |
3ba63671 | 3746 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 3747 | status = nfserr_jukebox; |
3ba63671 | 3748 | if (!conn) |
4f6e6c17 BF |
3749 | goto out; |
3750 | nfsd4_init_conn(rqstp, conn, session); | |
3751 | status = nfs_ok; | |
3752 | out: | |
d4e19e70 TM |
3753 | nfsd4_put_session(session); |
3754 | out_no_session: | |
4f6e6c17 | 3755 | return status; |
1d1bc8f2 BF |
3756 | } |
3757 | ||
665d5072 | 3758 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 3759 | { |
665d5072 | 3760 | if (!cstate->session) |
51d87bc2 | 3761 | return false; |
665d5072 | 3762 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3763 | } |
3764 | ||
069b6ad4 | 3765 | __be32 |
eb69853d CH |
3766 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3767 | union nfsd4_op_u *u) | |
069b6ad4 | 3768 | { |
ca0552f4 | 3769 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3770 | struct nfsd4_session *ses; |
abcdff09 | 3771 | __be32 status; |
f0f51f5c | 3772 | int ref_held_by_me = 0; |
d4e19e70 TM |
3773 | struct net *net = SVC_NET(r); |
3774 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3775 | |
abcdff09 | 3776 | status = nfserr_not_only_op; |
ca0552f4 | 3777 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3778 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3779 | goto out; |
f0f51f5c | 3780 | ref_held_by_me++; |
57716355 | 3781 | } |
ca0552f4 | 3782 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3783 | spin_lock(&nn->client_lock); |
ca0552f4 | 3784 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3785 | if (!ses) |
3786 | goto out_client_lock; | |
57266a6e | 3787 | status = nfserr_wrong_cred; |
dedeb13f | 3788 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3789 | goto out_put_session; |
f0f51f5c | 3790 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3791 | if (status) |
f0f51f5c | 3792 | goto out_put_session; |
e10e0cfc | 3793 | unhash_session(ses); |
c9a49628 | 3794 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3795 | |
84f5f7cc | 3796 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3797 | |
c9a49628 | 3798 | spin_lock(&nn->client_lock); |
e10e0cfc | 3799 | status = nfs_ok; |
f0f51f5c | 3800 | out_put_session: |
d4e19e70 | 3801 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3802 | out_client_lock: |
3803 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3804 | out: |
e10e0cfc | 3805 | return status; |
069b6ad4 AA |
3806 | } |
3807 | ||
57266a6e | 3808 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3809 | { |
3810 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3811 | struct nfsd4_conn *c; |
57266a6e | 3812 | __be32 status = nfs_ok; |
21b75b01 | 3813 | int ret; |
328ead28 BF |
3814 | |
3815 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3816 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3817 | if (c) |
3818 | goto out_free; | |
3819 | status = nfserr_conn_not_bound_to_session; | |
3820 | if (clp->cl_mach_cred) | |
3821 | goto out_free; | |
328ead28 BF |
3822 | __nfsd4_hash_conn(new, ses); |
3823 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3824 | ret = nfsd4_register_conn(new); |
3825 | if (ret) | |
3826 | /* oops; xprt is already down: */ | |
3827 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3828 | return nfs_ok; |
3829 | out_free: | |
3830 | spin_unlock(&clp->cl_lock); | |
3831 | free_conn(new); | |
3832 | return status; | |
328ead28 BF |
3833 | } |
3834 | ||
868b89c3 MJ |
3835 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3836 | { | |
3837 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3838 | ||
3839 | return args->opcnt > session->se_fchannel.maxops; | |
3840 | } | |
3841 | ||
ae82a8d0 MJ |
3842 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3843 | struct nfsd4_session *session) | |
3844 | { | |
3845 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3846 | ||
3847 | return xb->len > session->se_fchannel.maxreq_sz; | |
3848 | } | |
3849 | ||
53da6a53 BF |
3850 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3851 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3852 | { | |
3853 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3854 | ||
3855 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3856 | (bool)seq->cachethis) | |
3857 | return false; | |
3858 | /* | |
6e73e92b SM |
3859 | * If there's an error then the reply can have fewer ops than |
3860 | * the call. | |
53da6a53 | 3861 | */ |
6e73e92b SM |
3862 | if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) |
3863 | return false; | |
3864 | /* | |
3865 | * But if we cached a reply with *more* ops than the call you're | |
3866 | * sending us now, then this new call is clearly not really a | |
3867 | * replay of the old one: | |
3868 | */ | |
3869 | if (slot->sl_opcnt > argp->opcnt) | |
53da6a53 BF |
3870 | return false; |
3871 | /* This is the only check explicitly called by spec: */ | |
3872 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3873 | return false; | |
3874 | /* | |
3875 | * There may be more comparisons we could actually do, but the | |
3876 | * spec doesn't require us to catch every case where the calls | |
3877 | * don't match (that would require caching the call as well as | |
3878 | * the reply), so we don't bother. | |
3879 | */ | |
3880 | return true; | |
3881 | } | |
3882 | ||
069b6ad4 | 3883 | __be32 |
eb69853d CH |
3884 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3885 | union nfsd4_op_u *u) | |
069b6ad4 | 3886 | { |
eb69853d | 3887 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3888 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
bddfdbcd | 3889 | struct xdr_stream *xdr = resp->xdr; |
b85d4c01 | 3890 | struct nfsd4_session *session; |
221a6876 | 3891 | struct nfs4_client *clp; |
b85d4c01 | 3892 | struct nfsd4_slot *slot; |
a663bdd8 | 3893 | struct nfsd4_conn *conn; |
57b7b43b | 3894 | __be32 status; |
47ee5298 | 3895 | int buflen; |
d4e19e70 TM |
3896 | struct net *net = SVC_NET(rqstp); |
3897 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3898 | |
f9bb94c4 AA |
3899 | if (resp->opcnt != 1) |
3900 | return nfserr_sequence_pos; | |
3901 | ||
a663bdd8 BF |
3902 | /* |
3903 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3904 | * below. | |
3905 | */ | |
3906 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3907 | if (!conn) | |
3908 | return nfserr_jukebox; | |
3909 | ||
c9a49628 | 3910 | spin_lock(&nn->client_lock); |
d4e19e70 | 3911 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3912 | if (!session) |
221a6876 BF |
3913 | goto out_no_session; |
3914 | clp = session->se_client; | |
b85d4c01 | 3915 | |
868b89c3 MJ |
3916 | status = nfserr_too_many_ops; |
3917 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3918 | goto out_put_session; |
868b89c3 | 3919 | |
ae82a8d0 MJ |
3920 | status = nfserr_req_too_big; |
3921 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3922 | goto out_put_session; |
ae82a8d0 | 3923 | |
b85d4c01 | 3924 | status = nfserr_badslot; |
6c18ba9f | 3925 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3926 | goto out_put_session; |
b85d4c01 | 3927 | |
557ce264 | 3928 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3929 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3930 | ||
a8dfdaeb AA |
3931 | /* We do not negotiate the number of slots yet, so set the |
3932 | * maxslots to the session maxreqs which is used to encode | |
3933 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3934 | seq->maxslots = session->se_fchannel.maxreqs; | |
3935 | ||
73e79482 BF |
3936 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3937 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3938 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3939 | status = nfserr_seq_misordered; |
3940 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3941 | goto out_put_session; |
53da6a53 BF |
3942 | status = nfserr_seq_false_retry; |
3943 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3944 | goto out_put_session; | |
b85d4c01 BH |
3945 | cstate->slot = slot; |
3946 | cstate->session = session; | |
4b24ca7d | 3947 | cstate->clp = clp; |
da3846a2 | 3948 | /* Return the cached reply status and set cstate->status |
557ce264 | 3949 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3950 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3951 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3952 | goto out; |
b85d4c01 BH |
3953 | } |
3954 | if (status) | |
66b2b9b2 | 3955 | goto out_put_session; |
b85d4c01 | 3956 | |
57266a6e | 3957 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3958 | conn = NULL; |
57266a6e BF |
3959 | if (status) |
3960 | goto out_put_session; | |
328ead28 | 3961 | |
47ee5298 BF |
3962 | buflen = (seq->cachethis) ? |
3963 | session->se_fchannel.maxresp_cached : | |
3964 | session->se_fchannel.maxresp_sz; | |
3965 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3966 | nfserr_rep_too_big; | |
a5cddc88 | 3967 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3968 | goto out_put_session; |
32aaa62e | 3969 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3970 | |
3971 | status = nfs_ok; | |
b85d4c01 | 3972 | /* Success! bump slot seqid */ |
b85d4c01 | 3973 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3974 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3975 | if (seq->cachethis) |
3976 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3977 | else |
3978 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3979 | |
3980 | cstate->slot = slot; | |
3981 | cstate->session = session; | |
4b24ca7d | 3982 | cstate->clp = clp; |
b85d4c01 | 3983 | |
b85d4c01 | 3984 | out: |
221a6876 BF |
3985 | switch (clp->cl_cb_state) { |
3986 | case NFSD4_CB_DOWN: | |
3987 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3988 | break; | |
3989 | case NFSD4_CB_FAULT: | |
3990 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3991 | break; | |
3992 | default: | |
3993 | seq->status_flags = 0; | |
aaf84eb9 | 3994 | } |
3bd64a5b BF |
3995 | if (!list_empty(&clp->cl_revoked)) |
3996 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3997 | out_no_session: |
3f42d2c4 KM |
3998 | if (conn) |
3999 | free_conn(conn); | |
c9a49628 | 4000 | spin_unlock(&nn->client_lock); |
b85d4c01 | 4001 | return status; |
66b2b9b2 | 4002 | out_put_session: |
d4e19e70 | 4003 | nfsd4_put_session_locked(session); |
221a6876 | 4004 | goto out_no_session; |
069b6ad4 AA |
4005 | } |
4006 | ||
b607664e TM |
4007 | void |
4008 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
4009 | { | |
4010 | struct nfsd4_compound_state *cs = &resp->cstate; | |
4011 | ||
4012 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
4013 | if (cs->status != nfserr_replay_cache) { |
4014 | nfsd4_store_cache_entry(resp); | |
4015 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
4016 | } | |
d4e19e70 | 4017 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 4018 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
4019 | } else if (cs->clp) |
4020 | put_client_renew(cs->clp); | |
b607664e TM |
4021 | } |
4022 | ||
345c2842 | 4023 | __be32 |
eb69853d CH |
4024 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
4025 | struct nfsd4_compound_state *cstate, | |
4026 | union nfsd4_op_u *u) | |
345c2842 | 4027 | { |
eb69853d | 4028 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
4029 | struct nfs4_client *conf, *unconf; |
4030 | struct nfs4_client *clp = NULL; | |
57b7b43b | 4031 | __be32 status = 0; |
8daae4dc | 4032 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 4033 | |
6b10ad19 | 4034 | spin_lock(&nn->client_lock); |
0a7ec377 | 4035 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 4036 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 4037 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
4038 | |
4039 | if (conf) { | |
c0293b01 | 4040 | if (client_has_state(conf)) { |
345c2842 MJ |
4041 | status = nfserr_clientid_busy; |
4042 | goto out; | |
4043 | } | |
fd699b8a JL |
4044 | status = mark_client_expired_locked(conf); |
4045 | if (status) | |
4046 | goto out; | |
6b10ad19 | 4047 | clp = conf; |
345c2842 MJ |
4048 | } else if (unconf) |
4049 | clp = unconf; | |
4050 | else { | |
4051 | status = nfserr_stale_clientid; | |
4052 | goto out; | |
4053 | } | |
dedeb13f | 4054 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 4055 | clp = NULL; |
57266a6e BF |
4056 | status = nfserr_wrong_cred; |
4057 | goto out; | |
4058 | } | |
c41a9b7a | 4059 | trace_nfsd_clid_destroyed(&clp->cl_clientid); |
6b10ad19 | 4060 | unhash_client_locked(clp); |
345c2842 | 4061 | out: |
6b10ad19 | 4062 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
4063 | if (clp) |
4064 | expire_client(clp); | |
345c2842 MJ |
4065 | return status; |
4066 | } | |
4067 | ||
4dc6ec00 | 4068 | __be32 |
eb69853d CH |
4069 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
4070 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 4071 | { |
eb69853d | 4072 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
ec59659b | 4073 | struct nfs4_client *clp = cstate->clp; |
57b7b43b | 4074 | __be32 status = 0; |
bcecf1cc | 4075 | |
4dc6ec00 BF |
4076 | if (rc->rca_one_fs) { |
4077 | if (!cstate->current_fh.fh_dentry) | |
4078 | return nfserr_nofilehandle; | |
4079 | /* | |
4080 | * We don't take advantage of the rca_one_fs case. | |
4081 | * That's OK, it's optional, we can safely ignore it. | |
4082 | */ | |
d28c442f | 4083 | return nfs_ok; |
4dc6ec00 | 4084 | } |
bcecf1cc | 4085 | |
bcecf1cc | 4086 | status = nfserr_complete_already; |
ec59659b | 4087 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
bcecf1cc MJ |
4088 | goto out; |
4089 | ||
4090 | status = nfserr_stale_clientid; | |
ec59659b | 4091 | if (is_client_expired(clp)) |
4dc6ec00 BF |
4092 | /* |
4093 | * The following error isn't really legal. | |
4094 | * But we only get here if the client just explicitly | |
4095 | * destroyed the client. Surely it no longer cares what | |
4096 | * error it gets back on an operation for the dead | |
4097 | * client. | |
4098 | */ | |
bcecf1cc MJ |
4099 | goto out; |
4100 | ||
4101 | status = nfs_ok; | |
cee8aa07 | 4102 | trace_nfsd_clid_reclaim_complete(&clp->cl_clientid); |
ec59659b BF |
4103 | nfsd4_client_record_create(clp); |
4104 | inc_reclaim_complete(clp); | |
bcecf1cc | 4105 | out: |
bcecf1cc | 4106 | return status; |
4dc6ec00 BF |
4107 | } |
4108 | ||
b37ad28b | 4109 | __be32 |
b591480b | 4110 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 4111 | union nfsd4_op_u *u) |
1da177e4 | 4112 | { |
eb69853d | 4113 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 4114 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 4115 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
4116 | struct nfs4_client *conf, *new; |
4117 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 4118 | __be32 status; |
c212cecf SK |
4119 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
4120 | ||
5cc40fd7 TM |
4121 | new = create_client(clname, rqstp, &clverifier); |
4122 | if (new == NULL) | |
4123 | return nfserr_jukebox; | |
3dbacee6 | 4124 | spin_lock(&nn->client_lock); |
382a62e7 | 4125 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 4126 | if (conf && client_has_state(conf)) { |
1da177e4 | 4127 | status = nfserr_clid_inuse; |
e203d506 BF |
4128 | if (clp_used_exchangeid(conf)) |
4129 | goto out; | |
026722c2 | 4130 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
27787733 | 4131 | trace_nfsd_clid_cred_mismatch(conf, rqstp); |
1da177e4 LT |
4132 | goto out; |
4133 | } | |
1da177e4 | 4134 | } |
a99454aa | 4135 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 4136 | if (unconf) |
3dbacee6 | 4137 | unhash_client_locked(unconf); |
744ea54c CL |
4138 | if (conf) { |
4139 | if (same_verf(&conf->cl_verifier, &clverifier)) { | |
4140 | copy_clid(new, conf); | |
4141 | gen_confirm(new, nn); | |
4142 | } else | |
4143 | trace_nfsd_clid_verf_mismatch(conf, rqstp, | |
4144 | &clverifier); | |
237f91c8 CL |
4145 | } else |
4146 | trace_nfsd_clid_fresh(new); | |
8323c3b2 | 4147 | new->cl_minorversion = 0; |
6f3d772f | 4148 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 4149 | add_to_unconfirmed(new); |
1da177e4 LT |
4150 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
4151 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
4152 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 4153 | new = NULL; |
1da177e4 LT |
4154 | status = nfs_ok; |
4155 | out: | |
3dbacee6 | 4156 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
4157 | if (new) |
4158 | free_client(new); | |
237f91c8 CL |
4159 | if (unconf) { |
4160 | trace_nfsd_clid_expire_unconf(&unconf->cl_clientid); | |
3dbacee6 | 4161 | expire_client(unconf); |
237f91c8 | 4162 | } |
1da177e4 LT |
4163 | return status; |
4164 | } | |
4165 | ||
b37ad28b | 4166 | __be32 |
b591480b | 4167 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
4168 | struct nfsd4_compound_state *cstate, |
4169 | union nfsd4_op_u *u) | |
1da177e4 | 4170 | { |
eb69853d CH |
4171 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
4172 | &u->setclientid_confirm; | |
21ab45a4 | 4173 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 4174 | struct nfs4_client *old = NULL; |
1da177e4 LT |
4175 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
4176 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 4177 | __be32 status; |
7f2210fa | 4178 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 4179 | |
2c142baa | 4180 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 4181 | return nfserr_stale_clientid; |
21ab45a4 | 4182 | |
d20c11d8 | 4183 | spin_lock(&nn->client_lock); |
8daae4dc | 4184 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 4185 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 4186 | /* |
8695b90a BF |
4187 | * We try hard to give out unique clientid's, so if we get an |
4188 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
4189 | * the client may be buggy; this should never happen. |
4190 | * | |
4191 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 4192 | */ |
f984a7ce | 4193 | status = nfserr_clid_inuse; |
27787733 CL |
4194 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
4195 | trace_nfsd_clid_cred_mismatch(unconf, rqstp); | |
8695b90a | 4196 | goto out; |
27787733 CL |
4197 | } |
4198 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
4199 | trace_nfsd_clid_cred_mismatch(conf, rqstp); | |
8695b90a | 4200 | goto out; |
27787733 | 4201 | } |
90d700b7 | 4202 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 | 4203 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
1da177e4 | 4204 | status = nfs_ok; |
237f91c8 | 4205 | } else |
90d700b7 BF |
4206 | status = nfserr_stale_clientid; |
4207 | goto out; | |
4208 | } | |
4209 | status = nfs_ok; | |
237f91c8 | 4210 | if (conf) { |
d20c11d8 JL |
4211 | old = unconf; |
4212 | unhash_client_locked(old); | |
8695b90a | 4213 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
237f91c8 | 4214 | } else { |
d20c11d8 JL |
4215 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
4216 | if (old) { | |
2b634821 BF |
4217 | status = nfserr_clid_inuse; |
4218 | if (client_has_state(old) | |
4219 | && !same_creds(&unconf->cl_cred, | |
ab451ea9 DN |
4220 | &old->cl_cred)) { |
4221 | old = NULL; | |
2b634821 | 4222 | goto out; |
ab451ea9 | 4223 | } |
d20c11d8 | 4224 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
4225 | if (status) { |
4226 | old = NULL; | |
221a6876 | 4227 | goto out; |
7abea1e8 | 4228 | } |
2958d2ee | 4229 | trace_nfsd_clid_replaced(&old->cl_clientid); |
221a6876 | 4230 | } |
8695b90a | 4231 | move_to_confirmed(unconf); |
d20c11d8 | 4232 | conf = unconf; |
08e8987c | 4233 | } |
d20c11d8 JL |
4234 | get_client_locked(conf); |
4235 | spin_unlock(&nn->client_lock); | |
934bd07f BF |
4236 | if (conf == unconf) |
4237 | fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY); | |
d20c11d8 JL |
4238 | nfsd4_probe_callback(conf); |
4239 | spin_lock(&nn->client_lock); | |
4240 | put_client_renew_locked(conf); | |
1da177e4 | 4241 | out: |
d20c11d8 JL |
4242 | spin_unlock(&nn->client_lock); |
4243 | if (old) | |
4244 | expire_client(old); | |
1da177e4 LT |
4245 | return status; |
4246 | } | |
4247 | ||
32513b40 BF |
4248 | static struct nfs4_file *nfsd4_alloc_file(void) |
4249 | { | |
4250 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
4251 | } | |
4252 | ||
1da177e4 | 4253 | /* OPEN Share state helper functions */ |
f9b60e22 | 4254 | static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval, |
5b095e99 | 4255 | struct nfs4_file *fp) |
1da177e4 | 4256 | { |
950e0118 TM |
4257 | lockdep_assert_held(&state_lock); |
4258 | ||
818a34eb | 4259 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 4260 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
4261 | INIT_LIST_HEAD(&fp->fi_stateids); |
4262 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 4263 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
f9b60e22 | 4264 | fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle); |
0c637be8 | 4265 | fp->fi_deleg_file = NULL; |
32513b40 | 4266 | fp->fi_had_conflict = false; |
baeb4ff0 | 4267 | fp->fi_share_deny = 0; |
32513b40 BF |
4268 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
4269 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
a0ce4837 BF |
4270 | fp->fi_aliased = false; |
4271 | fp->fi_inode = d_inode(fh->fh_dentry); | |
9cf514cc CH |
4272 | #ifdef CONFIG_NFSD_PNFS |
4273 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 4274 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 4275 | #endif |
5b095e99 | 4276 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
4277 | } |
4278 | ||
e8ff2a84 | 4279 | void |
1da177e4 LT |
4280 | nfsd4_free_slabs(void) |
4281 | { | |
9258a2d5 | 4282 | kmem_cache_destroy(client_slab); |
abf1135b CH |
4283 | kmem_cache_destroy(openowner_slab); |
4284 | kmem_cache_destroy(lockowner_slab); | |
4285 | kmem_cache_destroy(file_slab); | |
4286 | kmem_cache_destroy(stateid_slab); | |
4287 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 4288 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 4289 | } |
1da177e4 | 4290 | |
72083396 | 4291 | int |
e60d4398 N |
4292 | nfsd4_init_slabs(void) |
4293 | { | |
9258a2d5 JL |
4294 | client_slab = kmem_cache_create("nfsd4_clients", |
4295 | sizeof(struct nfs4_client), 0, 0, NULL); | |
4296 | if (client_slab == NULL) | |
4297 | goto out; | |
fe0750e5 BF |
4298 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
4299 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
4300 | if (openowner_slab == NULL) | |
9258a2d5 | 4301 | goto out_free_client_slab; |
fe0750e5 | 4302 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 4303 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 4304 | if (lockowner_slab == NULL) |
abf1135b | 4305 | goto out_free_openowner_slab; |
e60d4398 | 4306 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 4307 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 4308 | if (file_slab == NULL) |
abf1135b | 4309 | goto out_free_lockowner_slab; |
5ac049ac | 4310 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 4311 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 4312 | if (stateid_slab == NULL) |
abf1135b | 4313 | goto out_free_file_slab; |
5b2d21c1 | 4314 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 4315 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 4316 | if (deleg_slab == NULL) |
abf1135b | 4317 | goto out_free_stateid_slab; |
8287f009 SB |
4318 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
4319 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
4320 | if (odstate_slab == NULL) | |
4321 | goto out_free_deleg_slab; | |
e60d4398 | 4322 | return 0; |
abf1135b | 4323 | |
8287f009 SB |
4324 | out_free_deleg_slab: |
4325 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
4326 | out_free_stateid_slab: |
4327 | kmem_cache_destroy(stateid_slab); | |
4328 | out_free_file_slab: | |
4329 | kmem_cache_destroy(file_slab); | |
4330 | out_free_lockowner_slab: | |
4331 | kmem_cache_destroy(lockowner_slab); | |
4332 | out_free_openowner_slab: | |
4333 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
4334 | out_free_client_slab: |
4335 | kmem_cache_destroy(client_slab); | |
abf1135b | 4336 | out: |
e60d4398 | 4337 | return -ENOMEM; |
1da177e4 LT |
4338 | } |
4339 | ||
6867137e DN |
4340 | void nfsd4_init_leases_net(struct nfsd_net *nn) |
4341 | { | |
4271c2c0 DN |
4342 | struct sysinfo si; |
4343 | u64 max_clients; | |
4344 | ||
6867137e DN |
4345 | nn->nfsd4_lease = 90; /* default lease time */ |
4346 | nn->nfsd4_grace = 90; | |
4347 | nn->somebody_reclaimed = false; | |
4348 | nn->track_reclaim_completes = false; | |
4349 | nn->clverifier_counter = prandom_u32(); | |
4350 | nn->clientid_base = prandom_u32(); | |
4351 | nn->clientid_counter = nn->clientid_base + 1; | |
4352 | nn->s2s_cp_cl_id = nn->clientid_counter++; | |
0926c395 DN |
4353 | |
4354 | atomic_set(&nn->nfs4_client_count, 0); | |
4271c2c0 DN |
4355 | si_meminfo(&si); |
4356 | max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024); | |
4357 | max_clients *= NFS4_CLIENTS_PER_GB; | |
4358 | nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB); | |
6867137e DN |
4359 | } |
4360 | ||
ff194bd9 | 4361 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 4362 | { |
ff194bd9 BF |
4363 | rp->rp_status = nfserr_serverfault; |
4364 | rp->rp_buflen = 0; | |
4365 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
4366 | mutex_init(&rp->rp_mutex); |
4367 | } | |
4368 | ||
4369 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
4370 | struct nfs4_stateowner *so) | |
4371 | { | |
4372 | if (!nfsd4_has_session(cstate)) { | |
4373 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 4374 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
4375 | } |
4376 | } | |
4377 | ||
4378 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
4379 | { | |
4380 | struct nfs4_stateowner *so = cstate->replay_owner; | |
4381 | ||
4382 | if (so != NULL) { | |
4383 | cstate->replay_owner = NULL; | |
4384 | mutex_unlock(&so->so_replay.rp_mutex); | |
4385 | nfs4_put_stateowner(so); | |
4386 | } | |
1da177e4 LT |
4387 | } |
4388 | ||
fe0750e5 | 4389 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 4390 | { |
1da177e4 | 4391 | struct nfs4_stateowner *sop; |
1da177e4 | 4392 | |
fe0750e5 | 4393 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
4394 | if (!sop) |
4395 | return NULL; | |
4396 | ||
6f4859b8 | 4397 | xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); |
ff194bd9 | 4398 | if (!sop->so_owner.data) { |
fe0750e5 | 4399 | kmem_cache_free(slab, sop); |
1da177e4 | 4400 | return NULL; |
ff194bd9 | 4401 | } |
ff194bd9 | 4402 | |
ea1da636 | 4403 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
4404 | sop->so_client = clp; |
4405 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 4406 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
4407 | return sop; |
4408 | } | |
4409 | ||
fe0750e5 | 4410 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 4411 | { |
d4f0489f | 4412 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 4413 | |
d4f0489f TM |
4414 | list_add(&oo->oo_owner.so_strhash, |
4415 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 4416 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
4417 | } |
4418 | ||
8f4b54c5 JL |
4419 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
4420 | { | |
d4f0489f | 4421 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
4422 | } |
4423 | ||
6b180f0b JL |
4424 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
4425 | { | |
4426 | struct nfs4_openowner *oo = openowner(so); | |
4427 | ||
4428 | kmem_cache_free(openowner_slab, oo); | |
4429 | } | |
4430 | ||
4431 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
4432 | .so_unhash = nfs4_unhash_openowner, |
4433 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
4434 | }; |
4435 | ||
7fc0564e AE |
4436 | static struct nfs4_ol_stateid * |
4437 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4438 | { | |
4439 | struct nfs4_ol_stateid *local, *ret = NULL; | |
4440 | struct nfs4_openowner *oo = open->op_openowner; | |
4441 | ||
4442 | lockdep_assert_held(&fp->fi_lock); | |
4443 | ||
4444 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
4445 | /* ignore lock owners */ | |
4446 | if (local->st_stateowner->so_is_open_owner == 0) | |
4447 | continue; | |
15ca08d3 TM |
4448 | if (local->st_stateowner != &oo->oo_owner) |
4449 | continue; | |
4450 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 4451 | ret = local; |
a15dfcd5 | 4452 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
4453 | break; |
4454 | } | |
4455 | } | |
4456 | return ret; | |
4457 | } | |
4458 | ||
15ca08d3 TM |
4459 | static __be32 |
4460 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
4461 | { | |
4462 | __be32 ret = nfs_ok; | |
4463 | ||
4464 | switch (s->sc_type) { | |
4465 | default: | |
4466 | break; | |
4f176417 | 4467 | case 0: |
15ca08d3 TM |
4468 | case NFS4_CLOSED_STID: |
4469 | case NFS4_CLOSED_DELEG_STID: | |
4470 | ret = nfserr_bad_stateid; | |
4471 | break; | |
4472 | case NFS4_REVOKED_DELEG_STID: | |
4473 | ret = nfserr_deleg_revoked; | |
4474 | } | |
4475 | return ret; | |
4476 | } | |
4477 | ||
4478 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
4479 | static __be32 | |
4480 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
4481 | { | |
4482 | __be32 ret; | |
4483 | ||
4f34bd05 | 4484 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
4485 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
4486 | if (ret != nfs_ok) | |
4487 | mutex_unlock(&stp->st_mutex); | |
4488 | return ret; | |
4489 | } | |
4490 | ||
4491 | static struct nfs4_ol_stateid * | |
4492 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4493 | { | |
4494 | struct nfs4_ol_stateid *stp; | |
4495 | for (;;) { | |
4496 | spin_lock(&fp->fi_lock); | |
4497 | stp = nfsd4_find_existing_open(fp, open); | |
4498 | spin_unlock(&fp->fi_lock); | |
4499 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
4500 | break; | |
4501 | nfs4_put_stid(&stp->st_stid); | |
4502 | } | |
4503 | return stp; | |
4504 | } | |
4505 | ||
fe0750e5 | 4506 | static struct nfs4_openowner * |
13d6f66b | 4507 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
4508 | struct nfsd4_compound_state *cstate) |
4509 | { | |
13d6f66b | 4510 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 4511 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 4512 | |
fe0750e5 BF |
4513 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
4514 | if (!oo) | |
ff194bd9 | 4515 | return NULL; |
6b180f0b | 4516 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
4517 | oo->oo_owner.so_is_open_owner = 1; |
4518 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 4519 | oo->oo_flags = 0; |
db24b3b4 JL |
4520 | if (nfsd4_has_session(cstate)) |
4521 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 4522 | oo->oo_time = 0; |
38c387b5 | 4523 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 4524 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
4525 | spin_lock(&clp->cl_lock); |
4526 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
4527 | if (ret == NULL) { |
4528 | hash_openowner(oo, clp, strhashval); | |
4529 | ret = oo; | |
4530 | } else | |
d50ffded KM |
4531 | nfs4_free_stateowner(&oo->oo_owner); |
4532 | ||
d4f0489f | 4533 | spin_unlock(&clp->cl_lock); |
c5952338 | 4534 | return ret; |
1da177e4 LT |
4535 | } |
4536 | ||
7fc0564e | 4537 | static struct nfs4_ol_stateid * |
8c7245ab | 4538 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
4539 | { |
4540 | ||
fe0750e5 | 4541 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 4542 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 4543 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4544 | |
8c7245ab | 4545 | stp = open->op_stp; |
5cc1fb2a OD |
4546 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
4547 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 4548 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 4549 | |
15ca08d3 | 4550 | retry: |
7fc0564e AE |
4551 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
4552 | spin_lock(&fp->fi_lock); | |
4553 | ||
4554 | retstp = nfsd4_find_existing_open(fp, open); | |
4555 | if (retstp) | |
4556 | goto out_unlock; | |
8c7245ab OD |
4557 | |
4558 | open->op_stp = NULL; | |
a15dfcd5 | 4559 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 4560 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 4561 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 4562 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 4563 | get_nfs4_file(fp); |
11b9164a | 4564 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
4565 | stp->st_access_bmap = 0; |
4566 | stp->st_deny_bmap = 0; | |
4c4cd222 | 4567 | stp->st_openstp = NULL; |
1c755dc1 | 4568 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 4569 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
4570 | |
4571 | out_unlock: | |
1d31a253 | 4572 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 4573 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 4574 | if (retstp) { |
15ca08d3 TM |
4575 | /* Handle races with CLOSE */ |
4576 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
4577 | nfs4_put_stid(&retstp->st_stid); | |
4578 | goto retry; | |
4579 | } | |
8c7245ab | 4580 | /* To keep mutex tracking happy */ |
5cc1fb2a | 4581 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 4582 | stp = retstp; |
5cc1fb2a | 4583 | } |
8c7245ab | 4584 | return stp; |
1da177e4 LT |
4585 | } |
4586 | ||
d3134b10 JL |
4587 | /* |
4588 | * In the 4.0 case we need to keep the owners around a little while to handle | |
4589 | * CLOSE replay. We still do need to release any file access that is held by | |
4590 | * them before returning however. | |
4591 | */ | |
fd39ca9a | 4592 | static void |
d3134b10 | 4593 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 4594 | { |
217526e7 | 4595 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
4596 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
4597 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
4598 | nfsd_net_id); | |
73758fed | 4599 | |
fe0750e5 | 4600 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 4601 | |
b401be22 JL |
4602 | /* |
4603 | * We know that we hold one reference via nfsd4_close, and another | |
4604 | * "persistent" reference for the client. If the refcount is higher | |
4605 | * than 2, then there are still calls in progress that are using this | |
4606 | * stateid. We can't put the sc_file reference until they are finished. | |
4607 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
4608 | * there should be no danger of the refcount going back up again at | |
4609 | * this point. | |
4610 | */ | |
a15dfcd5 | 4611 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 4612 | |
d3134b10 JL |
4613 | release_all_access(s); |
4614 | if (s->st_stid.sc_file) { | |
4615 | put_nfs4_file(s->st_stid.sc_file); | |
4616 | s->st_stid.sc_file = NULL; | |
4617 | } | |
217526e7 JL |
4618 | |
4619 | spin_lock(&nn->client_lock); | |
4620 | last = oo->oo_last_closed_stid; | |
d3134b10 | 4621 | oo->oo_last_closed_stid = s; |
73758fed | 4622 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
20b7d86f | 4623 | oo->oo_time = ktime_get_boottime_seconds(); |
217526e7 JL |
4624 | spin_unlock(&nn->client_lock); |
4625 | if (last) | |
4626 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
4627 | } |
4628 | ||
1da177e4 LT |
4629 | /* search file_hashtbl[] for file */ |
4630 | static struct nfs4_file * | |
f9b60e22 | 4631 | find_file_locked(struct svc_fh *fh, unsigned int hashval) |
1da177e4 | 4632 | { |
1da177e4 LT |
4633 | struct nfs4_file *fp; |
4634 | ||
36a80491 MB |
4635 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, |
4636 | lockdep_is_held(&state_lock)) { | |
f9b60e22 | 4637 | if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { |
818a34eb | 4638 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 4639 | return fp; |
13cd2184 | 4640 | } |
1da177e4 LT |
4641 | } |
4642 | return NULL; | |
4643 | } | |
4644 | ||
a0ce4837 BF |
4645 | static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh, |
4646 | unsigned int hashval) | |
4647 | { | |
4648 | struct nfs4_file *fp; | |
4649 | struct nfs4_file *ret = NULL; | |
4650 | bool alias_found = false; | |
4651 | ||
4652 | spin_lock(&state_lock); | |
4653 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, | |
4654 | lockdep_is_held(&state_lock)) { | |
4655 | if (fh_match(&fp->fi_fhandle, &fh->fh_handle)) { | |
4656 | if (refcount_inc_not_zero(&fp->fi_ref)) | |
4657 | ret = fp; | |
4658 | } else if (d_inode(fh->fh_dentry) == fp->fi_inode) | |
4659 | fp->fi_aliased = alias_found = true; | |
4660 | } | |
4661 | if (likely(ret == NULL)) { | |
4662 | nfsd4_init_file(fh, hashval, new); | |
4663 | new->fi_aliased = alias_found; | |
4664 | ret = new; | |
4665 | } | |
4666 | spin_unlock(&state_lock); | |
4667 | return ret; | |
4668 | } | |
4669 | ||
f9b60e22 | 4670 | static struct nfs4_file * find_file(struct svc_fh *fh) |
950e0118 TM |
4671 | { |
4672 | struct nfs4_file *fp; | |
5b095e99 | 4673 | unsigned int hashval = file_hashval(fh); |
950e0118 | 4674 | |
5b095e99 JL |
4675 | rcu_read_lock(); |
4676 | fp = find_file_locked(fh, hashval); | |
4677 | rcu_read_unlock(); | |
950e0118 TM |
4678 | return fp; |
4679 | } | |
4680 | ||
4681 | static struct nfs4_file * | |
f9b60e22 | 4682 | find_or_add_file(struct nfs4_file *new, struct svc_fh *fh) |
950e0118 TM |
4683 | { |
4684 | struct nfs4_file *fp; | |
5b095e99 JL |
4685 | unsigned int hashval = file_hashval(fh); |
4686 | ||
4687 | rcu_read_lock(); | |
4688 | fp = find_file_locked(fh, hashval); | |
4689 | rcu_read_unlock(); | |
4690 | if (fp) | |
4691 | return fp; | |
950e0118 | 4692 | |
a0ce4837 | 4693 | return insert_file(new, fh, hashval); |
950e0118 TM |
4694 | } |
4695 | ||
1da177e4 LT |
4696 | /* |
4697 | * Called to check deny when READ with all zero stateid or | |
4698 | * WRITE with all zero or all one stateid | |
4699 | */ | |
b37ad28b | 4700 | static __be32 |
1da177e4 LT |
4701 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
4702 | { | |
1da177e4 | 4703 | struct nfs4_file *fp; |
baeb4ff0 | 4704 | __be32 ret = nfs_ok; |
1da177e4 | 4705 | |
f9b60e22 | 4706 | fp = find_file(current_fh); |
13cd2184 | 4707 | if (!fp) |
baeb4ff0 JL |
4708 | return ret; |
4709 | /* Check for conflicting share reservations */ | |
1d31a253 | 4710 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4711 | if (fp->fi_share_deny & deny_type) |
4712 | ret = nfserr_locked; | |
1d31a253 | 4713 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
4714 | put_nfs4_file(fp); |
4715 | return ret; | |
1da177e4 LT |
4716 | } |
4717 | ||
0162ac2b | 4718 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 4719 | { |
0162ac2b | 4720 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
4721 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
4722 | nfsd_net_id); | |
e8c69d17 | 4723 | |
11b9164a | 4724 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 4725 | |
dff1399f | 4726 | /* |
f54fe962 JL |
4727 | * We can't do this in nfsd_break_deleg_cb because it is |
4728 | * already holding inode->i_lock. | |
4729 | * | |
dff1399f JL |
4730 | * If the dl_time != 0, then we know that it has already been |
4731 | * queued for a lease break. Don't queue it again. | |
4732 | */ | |
f54fe962 | 4733 | spin_lock(&state_lock); |
548ec080 | 4734 | if (delegation_hashed(dp) && dp->dl_time == 0) { |
20b7d86f | 4735 | dp->dl_time = ktime_get_boottime_seconds(); |
02e1215f | 4736 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 4737 | } |
02e1215f JL |
4738 | spin_unlock(&state_lock); |
4739 | } | |
1da177e4 | 4740 | |
0162ac2b CH |
4741 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
4742 | struct rpc_task *task) | |
4743 | { | |
4744 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4745 | ||
12ed22f3 BF |
4746 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID || |
4747 | dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) | |
a457974f AE |
4748 | return 1; |
4749 | ||
0162ac2b CH |
4750 | switch (task->tk_status) { |
4751 | case 0: | |
4752 | return 1; | |
1c73b9d2 SM |
4753 | case -NFS4ERR_DELAY: |
4754 | rpc_delay(task, 2 * HZ); | |
4755 | return 0; | |
0162ac2b CH |
4756 | case -EBADHANDLE: |
4757 | case -NFS4ERR_BAD_STATEID: | |
4758 | /* | |
4759 | * Race: client probably got cb_recall before open reply | |
4760 | * granting delegation. | |
4761 | */ | |
4762 | if (dp->dl_retries--) { | |
4763 | rpc_delay(task, 2 * HZ); | |
4764 | return 0; | |
4765 | } | |
df561f66 | 4766 | fallthrough; |
0162ac2b | 4767 | default: |
1c73b9d2 | 4768 | return 1; |
0162ac2b CH |
4769 | } |
4770 | } | |
4771 | ||
4772 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
4773 | { | |
4774 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4775 | ||
4776 | nfs4_put_stid(&dp->dl_stid); | |
4777 | } | |
4778 | ||
c4cb8974 | 4779 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
4780 | .prepare = nfsd4_cb_recall_prepare, |
4781 | .done = nfsd4_cb_recall_done, | |
4782 | .release = nfsd4_cb_recall_release, | |
4783 | }; | |
4784 | ||
02e1215f JL |
4785 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
4786 | { | |
4787 | /* | |
4788 | * We're assuming the state code never drops its reference | |
4789 | * without first removing the lease. Since we're in this lease | |
4a269efb BF |
4790 | * callback (and since the lease code is serialized by the |
4791 | * i_lock) we know the server hasn't removed the lease yet, and | |
4792 | * we know it's safe to take a reference. | |
02e1215f | 4793 | */ |
a15dfcd5 | 4794 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 4795 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
4796 | } |
4797 | ||
1c8c601a | 4798 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
4799 | static bool |
4800 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 4801 | { |
4d01b7f5 | 4802 | bool ret = false; |
653e514e BF |
4803 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
4804 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
66af2579 DN |
4805 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
4806 | struct nfsd_net *nn; | |
6b57d9c8 | 4807 | |
17d76ddf | 4808 | trace_nfsd_cb_recall(&dp->dl_stid); |
dd5e3fbc | 4809 | |
66af2579 DN |
4810 | dp->dl_recalled = true; |
4811 | atomic_inc(&clp->cl_delegs_in_recall); | |
4812 | if (try_to_expire_client(clp)) { | |
4813 | nn = net_generic(clp->net, nfsd_net_id); | |
4814 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
4815 | } | |
4816 | ||
0272e1fd BF |
4817 | /* |
4818 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4819 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4820 | * in time: |
0272e1fd BF |
4821 | */ |
4822 | fl->fl_break_time = 0; | |
1da177e4 | 4823 | |
02e1215f | 4824 | spin_lock(&fp->fi_lock); |
417c6629 | 4825 | fp->fi_had_conflict = true; |
353601e7 | 4826 | nfsd_break_one_deleg(dp); |
02e1215f | 4827 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 4828 | return ret; |
1da177e4 LT |
4829 | } |
4830 | ||
50719bf3 CL |
4831 | /** |
4832 | * nfsd_breaker_owns_lease - Check if lease conflict was resolved | |
4833 | * @fl: Lock state to check | |
4834 | * | |
4835 | * Return values: | |
4836 | * %true: Lease conflict was resolved | |
4837 | * %false: Lease conflict was not resolved. | |
4838 | */ | |
28df3d15 BF |
4839 | static bool nfsd_breaker_owns_lease(struct file_lock *fl) |
4840 | { | |
4841 | struct nfs4_delegation *dl = fl->fl_owner; | |
4842 | struct svc_rqst *rqst; | |
4843 | struct nfs4_client *clp; | |
4844 | ||
4845 | if (!i_am_nfsd()) | |
50719bf3 | 4846 | return false; |
28df3d15 | 4847 | rqst = kthread_data(current); |
13956160 BF |
4848 | /* Note rq_prog == NFS_ACL_PROGRAM is also possible: */ |
4849 | if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4) | |
50719bf3 | 4850 | return false; |
28df3d15 BF |
4851 | clp = *(rqst->rq_lease_breaker); |
4852 | return dl->dl_stid.sc_client == clp; | |
4853 | } | |
4854 | ||
c45198ed | 4855 | static int |
7448cc37 JL |
4856 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4857 | struct list_head *dispose) | |
1da177e4 | 4858 | { |
66af2579 DN |
4859 | struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner; |
4860 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
4861 | ||
4862 | if (arg & F_UNLCK) { | |
4863 | if (dp->dl_recalled) | |
4864 | atomic_dec(&clp->cl_delegs_in_recall); | |
c45198ed | 4865 | return lease_modify(onlist, arg, dispose); |
66af2579 | 4866 | } else |
1da177e4 LT |
4867 | return -EAGAIN; |
4868 | } | |
4869 | ||
7b021967 | 4870 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
28df3d15 | 4871 | .lm_breaker_owns_lease = nfsd_breaker_owns_lease, |
8fb47a4f BF |
4872 | .lm_break = nfsd_break_deleg_cb, |
4873 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
4874 | }; |
4875 | ||
7a8711c9 BF |
4876 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
4877 | { | |
4878 | if (nfsd4_has_session(cstate)) | |
4879 | return nfs_ok; | |
4880 | if (seqid == so->so_seqid - 1) | |
4881 | return nfserr_replay_me; | |
4882 | if (seqid == so->so_seqid) | |
4883 | return nfs_ok; | |
4884 | return nfserr_bad_seqid; | |
4885 | } | |
1da177e4 | 4886 | |
7950b531 BF |
4887 | static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions, |
4888 | struct nfsd_net *nn) | |
4889 | { | |
4890 | struct nfs4_client *found; | |
4891 | ||
4892 | spin_lock(&nn->client_lock); | |
4893 | found = find_confirmed_client(clid, sessions, nn); | |
4894 | if (found) | |
4895 | atomic_inc(&found->cl_rpc_users); | |
4896 | spin_unlock(&nn->client_lock); | |
4897 | return found; | |
4898 | } | |
4899 | ||
460d2709 | 4900 | static __be32 set_client(clientid_t *clid, |
4b24ca7d | 4901 | struct nfsd4_compound_state *cstate, |
f71475ba | 4902 | struct nfsd_net *nn) |
4b24ca7d | 4903 | { |
4b24ca7d | 4904 | if (cstate->clp) { |
7950b531 | 4905 | if (!same_clid(&cstate->clp->cl_clientid, clid)) |
4b24ca7d JL |
4906 | return nfserr_stale_clientid; |
4907 | return nfs_ok; | |
4908 | } | |
4b24ca7d JL |
4909 | if (STALE_CLIENTID(clid, nn)) |
4910 | return nfserr_stale_clientid; | |
4b24ca7d | 4911 | /* |
f71475ba BF |
4912 | * We're in the 4.0 case (otherwise the SEQUENCE op would have |
4913 | * set cstate->clp), so session = false: | |
4b24ca7d | 4914 | */ |
f71475ba | 4915 | cstate->clp = lookup_clientid(clid, false, nn); |
7950b531 | 4916 | if (!cstate->clp) |
4b24ca7d | 4917 | return nfserr_expired; |
4b24ca7d JL |
4918 | return nfs_ok; |
4919 | } | |
4920 | ||
b37ad28b | 4921 | __be32 |
6668958f | 4922 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4923 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4924 | { |
1da177e4 LT |
4925 | clientid_t *clientid = &open->op_clientid; |
4926 | struct nfs4_client *clp = NULL; | |
4927 | unsigned int strhashval; | |
fe0750e5 | 4928 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4929 | __be32 status; |
1da177e4 | 4930 | |
32513b40 BF |
4931 | /* |
4932 | * In case we need it later, after we've already created the | |
4933 | * file and don't want to risk a further failure: | |
4934 | */ | |
4935 | open->op_file = nfsd4_alloc_file(); | |
4936 | if (open->op_file == NULL) | |
4937 | return nfserr_jukebox; | |
1da177e4 | 4938 | |
f71475ba | 4939 | status = set_client(clientid, cstate, nn); |
2d91e895 TM |
4940 | if (status) |
4941 | return status; | |
4942 | clp = cstate->clp; | |
4943 | ||
d4f0489f TM |
4944 | strhashval = ownerstr_hashval(&open->op_owner); |
4945 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4946 | open->op_openowner = oo; |
4947 | if (!oo) { | |
bcf130f9 | 4948 | goto new_owner; |
1da177e4 | 4949 | } |
dad1c067 | 4950 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4951 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4952 | release_openowner(oo); |
4953 | open->op_openowner = NULL; | |
bcf130f9 | 4954 | goto new_owner; |
0f442aa2 | 4955 | } |
4cdc951b BF |
4956 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4957 | if (status) | |
4958 | return status; | |
4cdc951b | 4959 | goto alloc_stateid; |
bcf130f9 | 4960 | new_owner: |
13d6f66b | 4961 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4962 | if (oo == NULL) |
4963 | return nfserr_jukebox; | |
4964 | open->op_openowner = oo; | |
4cdc951b | 4965 | alloc_stateid: |
b49e084d | 4966 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4967 | if (!open->op_stp) |
4968 | return nfserr_jukebox; | |
8287f009 SB |
4969 | |
4970 | if (nfsd4_has_session(cstate) && | |
4971 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4972 | open->op_odstate = alloc_clnt_odstate(clp); | |
4973 | if (!open->op_odstate) | |
4974 | return nfserr_jukebox; | |
4975 | } | |
4976 | ||
0f442aa2 | 4977 | return nfs_ok; |
1da177e4 LT |
4978 | } |
4979 | ||
b37ad28b | 4980 | static inline __be32 |
4a6e43e6 N |
4981 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4982 | { | |
4983 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4984 | return nfserr_openmode; | |
4985 | else | |
4986 | return nfs_ok; | |
4987 | } | |
4988 | ||
f459e453 | 4989 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4990 | { |
f459e453 | 4991 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4992 | } |
4993 | ||
38c2f4b1 | 4994 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4995 | { |
f459e453 | 4996 | struct nfs4_stid *ret; |
24a0111e | 4997 | |
95da1b3a AE |
4998 | ret = find_stateid_by_type(cl, s, |
4999 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
5000 | if (!ret) |
5001 | return NULL; | |
5002 | return delegstateid(ret); | |
24a0111e BF |
5003 | } |
5004 | ||
8b289b2c BF |
5005 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
5006 | { | |
5007 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
5008 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
5009 | } | |
5010 | ||
b37ad28b | 5011 | static __be32 |
41d22663 | 5012 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
5013 | struct nfs4_delegation **dp) |
5014 | { | |
5015 | int flags; | |
b37ad28b | 5016 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 5017 | struct nfs4_delegation *deleg; |
567d9829 | 5018 | |
dcd94cc2 TM |
5019 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
5020 | if (deleg == NULL) | |
c44c5eeb | 5021 | goto out; |
95da1b3a AE |
5022 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
5023 | nfs4_put_stid(&deleg->dl_stid); | |
5024 | if (cl->cl_minorversion) | |
5025 | status = nfserr_deleg_revoked; | |
5026 | goto out; | |
5027 | } | |
24a0111e | 5028 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
5029 | status = nfs4_check_delegmode(deleg, flags); |
5030 | if (status) { | |
5031 | nfs4_put_stid(&deleg->dl_stid); | |
5032 | goto out; | |
5033 | } | |
5034 | *dp = deleg; | |
c44c5eeb | 5035 | out: |
8b289b2c | 5036 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
5037 | return nfs_ok; |
5038 | if (status) | |
5039 | return status; | |
dad1c067 | 5040 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 5041 | return nfs_ok; |
567d9829 N |
5042 | } |
5043 | ||
21fb4016 BF |
5044 | static inline int nfs4_access_to_access(u32 nfs4_access) |
5045 | { | |
5046 | int flags = 0; | |
5047 | ||
5048 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
5049 | flags |= NFSD_MAY_READ; | |
5050 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
5051 | flags |= NFSD_MAY_WRITE; | |
5052 | return flags; | |
5053 | } | |
5054 | ||
7e6a72e5 CH |
5055 | static inline __be32 |
5056 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
5057 | struct nfsd4_open *open) | |
5058 | { | |
5059 | struct iattr iattr = { | |
5060 | .ia_valid = ATTR_SIZE, | |
5061 | .ia_size = 0, | |
5062 | }; | |
7fe2a71d N |
5063 | struct nfsd_attrs attrs = { |
5064 | .na_iattr = &iattr, | |
5065 | }; | |
7e6a72e5 CH |
5066 | if (!open->op_truncate) |
5067 | return 0; | |
5068 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
5069 | return nfserr_inval; | |
7fe2a71d | 5070 | return nfsd_setattr(rqstp, fh, &attrs, 0, (time64_t)0); |
7e6a72e5 CH |
5071 | } |
5072 | ||
0c12eaff | 5073 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 | 5074 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
3d694271 | 5075 | struct nfsd4_open *open, bool new_stp) |
f9d7562f | 5076 | { |
fd4f83fd | 5077 | struct nfsd_file *nf = NULL; |
f9d7562f | 5078 | __be32 status; |
0c12eaff CB |
5079 | int oflag = nfs4_access_to_omode(open->op_share_access); |
5080 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 5081 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 5082 | |
de18643d | 5083 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
5084 | |
5085 | /* | |
5086 | * Are we trying to set a deny mode that would conflict with | |
5087 | * current access? | |
5088 | */ | |
5089 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5090 | if (status != nfs_ok) { | |
3d694271 DN |
5091 | if (status != nfserr_share_denied) { |
5092 | spin_unlock(&fp->fi_lock); | |
5093 | goto out; | |
5094 | } | |
5095 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5096 | stp, open->op_share_deny, false)) | |
5097 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5098 | spin_unlock(&fp->fi_lock); |
5099 | goto out; | |
5100 | } | |
5101 | ||
5102 | /* set access to the file */ | |
5103 | status = nfs4_file_get_access(fp, open->op_share_access); | |
5104 | if (status != nfs_ok) { | |
3d694271 DN |
5105 | if (status != nfserr_share_denied) { |
5106 | spin_unlock(&fp->fi_lock); | |
5107 | goto out; | |
5108 | } | |
5109 | if (nfs4_resolve_deny_conflicts_locked(fp, new_stp, | |
5110 | stp, open->op_share_access, true)) | |
5111 | status = nfserr_jukebox; | |
baeb4ff0 JL |
5112 | spin_unlock(&fp->fi_lock); |
5113 | goto out; | |
5114 | } | |
5115 | ||
5116 | /* Set access bits in stateid */ | |
5117 | old_access_bmap = stp->st_access_bmap; | |
5118 | set_access(open->op_share_access, stp); | |
5119 | ||
5120 | /* Set new deny mask */ | |
5121 | old_deny_bmap = stp->st_deny_bmap; | |
5122 | set_deny(open->op_share_deny, stp); | |
5123 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
5124 | ||
f9d7562f | 5125 | if (!fp->fi_fds[oflag]) { |
de18643d | 5126 | spin_unlock(&fp->fi_lock); |
fb70bf12 CL |
5127 | |
5128 | if (!open->op_filp) { | |
5129 | status = nfsd_file_acquire(rqstp, cur_fh, access, &nf); | |
5130 | if (status != nfs_ok) | |
5131 | goto out_put_access; | |
5132 | } else { | |
5133 | status = nfsd_file_create(rqstp, cur_fh, access, &nf); | |
5134 | if (status != nfs_ok) | |
5135 | goto out_put_access; | |
5136 | nf->nf_file = open->op_filp; | |
5137 | open->op_filp = NULL; | |
be023006 | 5138 | trace_nfsd_file_create(rqstp, access, nf); |
fb70bf12 CL |
5139 | } |
5140 | ||
de18643d TM |
5141 | spin_lock(&fp->fi_lock); |
5142 | if (!fp->fi_fds[oflag]) { | |
fd4f83fd JL |
5143 | fp->fi_fds[oflag] = nf; |
5144 | nf = NULL; | |
de18643d | 5145 | } |
f9d7562f | 5146 | } |
de18643d | 5147 | spin_unlock(&fp->fi_lock); |
fd4f83fd JL |
5148 | if (nf) |
5149 | nfsd_file_put(nf); | |
f9d7562f | 5150 | |
217fd6f6 BF |
5151 | status = nfserrno(nfsd_open_break_lease(cur_fh->fh_dentry->d_inode, |
5152 | access)); | |
5153 | if (status) | |
5154 | goto out_put_access; | |
5155 | ||
7e6a72e5 CH |
5156 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5157 | if (status) | |
5158 | goto out_put_access; | |
7e6a72e5 CH |
5159 | out: |
5160 | return status; | |
baeb4ff0 JL |
5161 | out_put_access: |
5162 | stp->st_access_bmap = old_access_bmap; | |
5163 | nfs4_file_put_access(fp, open->op_share_access); | |
5164 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
5165 | goto out; | |
1da177e4 LT |
5166 | } |
5167 | ||
b37ad28b | 5168 | static __be32 |
3d694271 DN |
5169 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, |
5170 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, | |
5171 | struct nfsd4_open *open) | |
1da177e4 | 5172 | { |
b37ad28b | 5173 | __be32 status; |
6ac75368 | 5174 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 5175 | |
6eb3a1d0 | 5176 | if (!test_access(open->op_share_access, stp)) |
3d694271 | 5177 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open, false); |
7e6a72e5 | 5178 | |
baeb4ff0 JL |
5179 | /* test and set deny mode */ |
5180 | spin_lock(&fp->fi_lock); | |
5181 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
5182 | if (status == nfs_ok) { | |
3d694271 DN |
5183 | if (status != nfserr_share_denied) { |
5184 | set_deny(open->op_share_deny, stp); | |
5185 | fp->fi_share_deny |= | |
baeb4ff0 | 5186 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); |
3d694271 DN |
5187 | } else { |
5188 | if (nfs4_resolve_deny_conflicts_locked(fp, false, | |
5189 | stp, open->op_share_deny, false)) | |
5190 | status = nfserr_jukebox; | |
5191 | } | |
baeb4ff0 JL |
5192 | } |
5193 | spin_unlock(&fp->fi_lock); | |
5194 | ||
5195 | if (status != nfs_ok) | |
1da177e4 | 5196 | return status; |
1da177e4 | 5197 | |
baeb4ff0 JL |
5198 | status = nfsd4_truncate(rqstp, cur_fh, open); |
5199 | if (status != nfs_ok) | |
5200 | reset_union_bmap_deny(old_deny_bmap, stp); | |
5201 | return status; | |
5202 | } | |
1da177e4 | 5203 | |
14a24e99 BF |
5204 | /* Should we give out recallable state?: */ |
5205 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
5206 | { | |
5207 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
5208 | return true; | |
5209 | /* | |
5210 | * In the sessions case, since we don't have to establish a | |
5211 | * separate connection for callbacks, we assume it's OK | |
5212 | * until we hear otherwise: | |
5213 | */ | |
5214 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
5215 | } | |
5216 | ||
653e514e BF |
5217 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
5218 | int flag) | |
22d38c4c BF |
5219 | { |
5220 | struct file_lock *fl; | |
5221 | ||
5222 | fl = locks_alloc_lock(); | |
5223 | if (!fl) | |
5224 | return NULL; | |
22d38c4c | 5225 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 5226 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
5227 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
5228 | fl->fl_end = OFFSET_MAX; | |
653e514e | 5229 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 5230 | fl->fl_pid = current->tgid; |
eb82dd39 | 5231 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; |
22d38c4c BF |
5232 | return fl; |
5233 | } | |
5234 | ||
aba2072f BF |
5235 | static int nfsd4_check_conflicting_opens(struct nfs4_client *clp, |
5236 | struct nfs4_file *fp) | |
5237 | { | |
5238 | struct nfs4_ol_stateid *st; | |
5239 | struct file *f = fp->fi_deleg_file->nf_file; | |
5240 | struct inode *ino = locks_inode(f); | |
5241 | int writes; | |
5242 | ||
5243 | writes = atomic_read(&ino->i_writecount); | |
5244 | if (!writes) | |
5245 | return 0; | |
5246 | /* | |
5247 | * There could be multiple filehandles (hence multiple | |
5248 | * nfs4_files) referencing this file, but that's not too | |
5249 | * common; let's just give up in that case rather than | |
5250 | * trying to go look up all the clients using that other | |
5251 | * nfs4_file as well: | |
5252 | */ | |
5253 | if (fp->fi_aliased) | |
5254 | return -EAGAIN; | |
5255 | /* | |
5256 | * If there's a close in progress, make sure that we see it | |
5257 | * clear any fi_fds[] entries before we see it decrement | |
5258 | * i_writecount: | |
5259 | */ | |
5260 | smp_mb__after_atomic(); | |
5261 | ||
5262 | if (fp->fi_fds[O_WRONLY]) | |
5263 | writes--; | |
5264 | if (fp->fi_fds[O_RDWR]) | |
5265 | writes--; | |
5266 | if (writes > 0) | |
5267 | return -EAGAIN; /* There may be non-NFSv4 writers */ | |
5268 | /* | |
5269 | * It's possible there are non-NFSv4 write opens in progress, | |
5270 | * but if they haven't incremented i_writecount yet then they | |
5271 | * also haven't called break lease yet; so, they'll break this | |
5272 | * lease soon enough. So, all that's left to check for is NFSv4 | |
5273 | * opens: | |
5274 | */ | |
5275 | spin_lock(&fp->fi_lock); | |
5276 | list_for_each_entry(st, &fp->fi_stateids, st_perfile) { | |
5277 | if (st->st_openstp == NULL /* it's an open */ && | |
5278 | access_permit_write(st) && | |
5279 | st->st_stid.sc_client != clp) { | |
5280 | spin_unlock(&fp->fi_lock); | |
5281 | return -EAGAIN; | |
5282 | } | |
5283 | } | |
5284 | spin_unlock(&fp->fi_lock); | |
5285 | /* | |
5286 | * There's a small chance that we could be racing with another | |
5287 | * NFSv4 open. However, any open that hasn't added itself to | |
5288 | * the fi_stateids list also hasn't called break_lease yet; so, | |
5289 | * they'll break this lease soon enough. | |
5290 | */ | |
5291 | return 0; | |
5292 | } | |
5293 | ||
876c553c JL |
5294 | /* |
5295 | * It's possible that between opening the dentry and setting the delegation, | |
5296 | * that it has been renamed or unlinked. Redo the lookup to verify that this | |
5297 | * hasn't happened. | |
5298 | */ | |
5299 | static int | |
5300 | nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp, | |
5301 | struct svc_fh *parent) | |
5302 | { | |
5303 | struct svc_export *exp; | |
5304 | struct dentry *child; | |
5305 | __be32 err; | |
5306 | ||
876c553c JL |
5307 | err = nfsd_lookup_dentry(open->op_rqstp, parent, |
5308 | open->op_fname, open->op_fnamelen, | |
5309 | &exp, &child); | |
5310 | ||
5311 | if (err) | |
5312 | return -EAGAIN; | |
5313 | ||
5314 | dput(child); | |
5315 | if (child != file_dentry(fp->fi_deleg_file->nf_file)) | |
5316 | return -EAGAIN; | |
5317 | ||
5318 | return 0; | |
5319 | } | |
5320 | ||
0b26693c | 5321 | static struct nfs4_delegation * |
876c553c JL |
5322 | nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5323 | struct svc_fh *parent) | |
acfdf5c3 | 5324 | { |
68b18f52 | 5325 | int status = 0; |
876c553c JL |
5326 | struct nfs4_client *clp = stp->st_stid.sc_client; |
5327 | struct nfs4_file *fp = stp->st_stid.sc_file; | |
5328 | struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate; | |
0b26693c | 5329 | struct nfs4_delegation *dp; |
eb82dd39 | 5330 | struct nfsd_file *nf; |
353601e7 | 5331 | struct file_lock *fl; |
417c6629 | 5332 | |
353601e7 BF |
5333 | /* |
5334 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
5335 | * here are just optimizations; we'll need to recheck them at | |
5336 | * the end: | |
5337 | */ | |
bf7bd3e9 | 5338 | if (fp->fi_had_conflict) |
0b26693c JL |
5339 | return ERR_PTR(-EAGAIN); |
5340 | ||
eb82dd39 JL |
5341 | nf = find_readable_file(fp); |
5342 | if (!nf) { | |
aba2072f BF |
5343 | /* |
5344 | * We probably could attempt another open and get a read | |
5345 | * delegation, but for now, don't bother until the | |
5346 | * client actually sends us one. | |
5347 | */ | |
5348 | return ERR_PTR(-EAGAIN); | |
353601e7 | 5349 | } |
34ed9872 AE |
5350 | spin_lock(&state_lock); |
5351 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
5352 | if (nfs4_delegation_exists(clp, fp)) |
5353 | status = -EAGAIN; | |
353601e7 | 5354 | else if (!fp->fi_deleg_file) { |
eb82dd39 | 5355 | fp->fi_deleg_file = nf; |
353601e7 BF |
5356 | /* increment early to prevent fi_deleg_file from being |
5357 | * cleared */ | |
5358 | fp->fi_delegees = 1; | |
eb82dd39 | 5359 | nf = NULL; |
353601e7 BF |
5360 | } else |
5361 | fp->fi_delegees++; | |
34ed9872 AE |
5362 | spin_unlock(&fp->fi_lock); |
5363 | spin_unlock(&state_lock); | |
eb82dd39 JL |
5364 | if (nf) |
5365 | nfsd_file_put(nf); | |
34ed9872 AE |
5366 | if (status) |
5367 | return ERR_PTR(status); | |
5368 | ||
353601e7 | 5369 | status = -ENOMEM; |
bbf936ed | 5370 | dp = alloc_init_deleg(clp, fp, odstate); |
0b26693c | 5371 | if (!dp) |
353601e7 BF |
5372 | goto out_delegees; |
5373 | ||
5374 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
5375 | if (!fl) | |
bd8d7250 | 5376 | goto out_clnt_odstate; |
353601e7 | 5377 | |
eb82dd39 | 5378 | status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); |
353601e7 BF |
5379 | if (fl) |
5380 | locks_free_lock(fl); | |
5381 | if (status) | |
5382 | goto out_clnt_odstate; | |
876c553c JL |
5383 | |
5384 | if (parent) { | |
5385 | status = nfsd4_verify_deleg_dentry(open, fp, parent); | |
5386 | if (status) | |
5387 | goto out_unlock; | |
5388 | } | |
5389 | ||
aba2072f BF |
5390 | status = nfsd4_check_conflicting_opens(clp, fp); |
5391 | if (status) | |
5392 | goto out_unlock; | |
0b26693c | 5393 | |
417c6629 JL |
5394 | spin_lock(&state_lock); |
5395 | spin_lock(&fp->fi_lock); | |
353601e7 | 5396 | if (fp->fi_had_conflict) |
417c6629 | 5397 | status = -EAGAIN; |
353601e7 BF |
5398 | else |
5399 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 5400 | spin_unlock(&fp->fi_lock); |
cdc97505 | 5401 | spin_unlock(&state_lock); |
353601e7 BF |
5402 | |
5403 | if (status) | |
692ad280 AE |
5404 | goto out_unlock; |
5405 | ||
0b26693c | 5406 | return dp; |
692ad280 | 5407 | out_unlock: |
eb82dd39 | 5408 | vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 BF |
5409 | out_clnt_odstate: |
5410 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
5411 | nfs4_put_stid(&dp->dl_stid); |
5412 | out_delegees: | |
5413 | put_deleg_file(fp); | |
5414 | return ERR_PTR(status); | |
edab9782 BF |
5415 | } |
5416 | ||
4aa8913c BH |
5417 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
5418 | { | |
5419 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5420 | if (status == -EAGAIN) | |
5421 | open->op_why_no_deleg = WND4_CONTENTION; | |
5422 | else { | |
5423 | open->op_why_no_deleg = WND4_RESOURCE; | |
5424 | switch (open->op_deleg_want) { | |
5425 | case NFS4_SHARE_WANT_READ_DELEG: | |
5426 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
5427 | case NFS4_SHARE_WANT_ANY_DELEG: | |
5428 | break; | |
5429 | case NFS4_SHARE_WANT_CANCEL: | |
5430 | open->op_why_no_deleg = WND4_CANCELLED; | |
5431 | break; | |
5432 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 5433 | WARN_ON_ONCE(1); |
4aa8913c BH |
5434 | } |
5435 | } | |
5436 | } | |
5437 | ||
1da177e4 LT |
5438 | /* |
5439 | * Attempt to hand out a delegation. | |
99c41515 BF |
5440 | * |
5441 | * Note we don't support write delegations, and won't until the vfs has | |
5442 | * proper support for them. | |
1da177e4 LT |
5443 | */ |
5444 | static void | |
876c553c JL |
5445 | nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp, |
5446 | struct svc_fh *currentfh) | |
1da177e4 LT |
5447 | { |
5448 | struct nfs4_delegation *dp; | |
4cf59221 JL |
5449 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
5450 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
876c553c | 5451 | struct svc_fh *parent = NULL; |
14a24e99 | 5452 | int cb_up; |
99c41515 | 5453 | int status = 0; |
1da177e4 | 5454 | |
fe0750e5 | 5455 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
5456 | open->op_recall = 0; |
5457 | switch (open->op_claim_type) { | |
5458 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 5459 | if (!cb_up) |
7b190fec | 5460 | open->op_recall = 1; |
99c41515 BF |
5461 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
5462 | goto out_no_deleg; | |
7b190fec N |
5463 | break; |
5464 | case NFS4_OPEN_CLAIM_NULL: | |
876c553c JL |
5465 | parent = currentfh; |
5466 | fallthrough; | |
ed47b062 | 5467 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
5468 | /* |
5469 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
5470 | * had the chance to reclaim theirs, *and* until |
5471 | * NLM locks have all been reclaimed: | |
99c41515 | 5472 | */ |
4cf59221 | 5473 | if (locks_in_grace(clp->net)) |
99c41515 | 5474 | goto out_no_deleg; |
dad1c067 | 5475 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 5476 | goto out_no_deleg; |
7b190fec N |
5477 | break; |
5478 | default: | |
99c41515 | 5479 | goto out_no_deleg; |
7b190fec | 5480 | } |
876c553c | 5481 | dp = nfs4_set_delegation(open, stp, parent); |
0b26693c | 5482 | if (IS_ERR(dp)) |
dd239cc0 | 5483 | goto out_no_deleg; |
1da177e4 | 5484 | |
d5477a8d | 5485 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 5486 | |
3caf9175 | 5487 | trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid); |
99c41515 | 5488 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 5489 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 5490 | return; |
dd239cc0 | 5491 | out_no_deleg: |
99c41515 BF |
5492 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
5493 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 5494 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 5495 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
5496 | open->op_recall = 1; |
5497 | } | |
99c41515 BF |
5498 | |
5499 | /* 4.1 client asking for a delegation? */ | |
5500 | if (open->op_deleg_want) | |
5501 | nfsd4_open_deleg_none_ext(open, status); | |
5502 | return; | |
1da177e4 LT |
5503 | } |
5504 | ||
e27f49c3 BH |
5505 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
5506 | struct nfs4_delegation *dp) | |
5507 | { | |
5508 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
5509 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5510 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5511 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
5512 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
5513 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5514 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5515 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
5516 | } | |
5517 | /* Otherwise the client must be confused wanting a delegation | |
5518 | * it already has, therefore we don't return | |
5519 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
5520 | */ | |
5521 | } | |
5522 | ||
7e2ce0cc CL |
5523 | /** |
5524 | * nfsd4_process_open2 - finish open processing | |
5525 | * @rqstp: the RPC transaction being executed | |
5526 | * @current_fh: NFSv4 COMPOUND's current filehandle | |
5527 | * @open: OPEN arguments | |
5528 | * | |
5529 | * If successful, (1) truncate the file if open->op_truncate was | |
5530 | * set, (2) set open->op_stateid, (3) set open->op_delegation. | |
5531 | * | |
5532 | * Returns %nfs_ok on success; otherwise an nfs4stat value in | |
5533 | * network byte order is returned. | |
5534 | */ | |
b37ad28b | 5535 | __be32 |
1da177e4 LT |
5536 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
5537 | { | |
6668958f | 5538 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 5539 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 5540 | struct nfs4_file *fp = NULL; |
dcef0413 | 5541 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 5542 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 5543 | __be32 status; |
d8a1a000 | 5544 | bool new_stp = false; |
1da177e4 | 5545 | |
1da177e4 LT |
5546 | /* |
5547 | * Lookup file; if found, lookup stateid and check open request, | |
5548 | * and check for delegations in the process of being recalled. | |
5549 | * If not found, create the nfs4_file struct | |
5550 | */ | |
f9b60e22 | 5551 | fp = find_or_add_file(open->op_file, current_fh); |
950e0118 | 5552 | if (fp != open->op_file) { |
41d22663 | 5553 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
5554 | if (status) |
5555 | goto out; | |
15ca08d3 | 5556 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 5557 | } else { |
950e0118 | 5558 | open->op_file = NULL; |
c44c5eeb | 5559 | status = nfserr_bad_stateid; |
8b289b2c | 5560 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 5561 | goto out; |
1da177e4 LT |
5562 | } |
5563 | ||
d8a1a000 TM |
5564 | if (!stp) { |
5565 | stp = init_open_stateid(fp, open); | |
5566 | if (!open->op_stp) | |
5567 | new_stp = true; | |
5568 | } | |
5569 | ||
1da177e4 LT |
5570 | /* |
5571 | * OPEN the file, or upgrade an existing OPEN. | |
5572 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
5573 | * |
5574 | * stp is already locked. | |
1da177e4 | 5575 | */ |
d8a1a000 | 5576 | if (!new_stp) { |
1da177e4 | 5577 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 5578 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 5579 | if (status) { |
feb9dad5 | 5580 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5581 | goto out; |
35a92fe8 | 5582 | } |
1da177e4 | 5583 | } else { |
3d694271 | 5584 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open, true); |
6eb3a1d0 | 5585 | if (status) { |
d8a1a000 | 5586 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 5587 | release_open_stateid(stp); |
d8a1a000 | 5588 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
5589 | goto out; |
5590 | } | |
8287f009 SB |
5591 | |
5592 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
5593 | open->op_odstate); | |
5594 | if (stp->st_clnt_odstate == open->op_odstate) | |
5595 | open->op_odstate = NULL; | |
1da177e4 | 5596 | } |
d8a1a000 | 5597 | |
9767feb2 | 5598 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 5599 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5600 | |
d24433cd | 5601 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
5602 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
5603 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5604 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
5605 | goto nodeleg; | |
5606 | } | |
5607 | } | |
5608 | ||
1da177e4 LT |
5609 | /* |
5610 | * Attempt to hand out a delegation. No error return, because the | |
5611 | * OPEN succeeds even if we fail. | |
5612 | */ | |
876c553c | 5613 | nfs4_open_delegation(open, stp, &resp->cstate.current_fh); |
d24433cd | 5614 | nodeleg: |
1da177e4 | 5615 | status = nfs_ok; |
3caf9175 | 5616 | trace_nfsd_open(&stp->st_stid.sc_stateid); |
1da177e4 | 5617 | out: |
d24433cd BH |
5618 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
5619 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
5620 | open->op_deleg_want) |
5621 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 5622 | |
13cd2184 N |
5623 | if (fp) |
5624 | put_nfs4_file(fp); | |
37515177 | 5625 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 5626 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
5627 | /* |
5628 | * To finish the open response, we just need to set the rflags. | |
5629 | */ | |
5630 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
5631 | if (nfsd4_has_session(&resp->cstate)) |
5632 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
5633 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 5634 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 5635 | |
dcd94cc2 TM |
5636 | if (dp) |
5637 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
5638 | if (stp) |
5639 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
5640 | |
5641 | return status; | |
5642 | } | |
5643 | ||
58fb12e6 | 5644 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 5645 | struct nfsd4_open *open) |
d29b20cd BF |
5646 | { |
5647 | if (open->op_openowner) { | |
d3134b10 JL |
5648 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
5649 | ||
5650 | nfsd4_cstate_assign_replay(cstate, so); | |
5651 | nfs4_put_stateowner(so); | |
d29b20cd | 5652 | } |
32513b40 | 5653 | if (open->op_file) |
5b095e99 | 5654 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 5655 | if (open->op_stp) |
6011695d | 5656 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
5657 | if (open->op_odstate) |
5658 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
5659 | } |
5660 | ||
b37ad28b | 5661 | __be32 |
b591480b | 5662 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5663 | union nfsd4_op_u *u) |
1da177e4 | 5664 | { |
eb69853d | 5665 | clientid_t *clid = &u->renew; |
1da177e4 | 5666 | struct nfs4_client *clp; |
b37ad28b | 5667 | __be32 status; |
7f2210fa | 5668 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5669 | |
dd5e3fbc | 5670 | trace_nfsd_clid_renew(clid); |
f71475ba | 5671 | status = set_client(clid, cstate, nn); |
9b2ef62b | 5672 | if (status) |
b4587eb2 | 5673 | return status; |
4b24ca7d | 5674 | clp = cstate->clp; |
ea1da636 | 5675 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 5676 | && clp->cl_cb_state != NFSD4_CB_UP) |
b4587eb2 BF |
5677 | return nfserr_cb_path_down; |
5678 | return nfs_ok; | |
1da177e4 LT |
5679 | } |
5680 | ||
7f5ef2e9 | 5681 | void |
12760c66 | 5682 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 5683 | { |
33dcc481 | 5684 | /* do nothing if grace period already ended */ |
a51c84ed | 5685 | if (nn->grace_ended) |
33dcc481 JL |
5686 | return; |
5687 | ||
dd5e3fbc | 5688 | trace_nfsd_grace_complete(nn); |
a51c84ed | 5689 | nn->grace_ended = true; |
70b28235 BF |
5690 | /* |
5691 | * If the server goes down again right now, an NFSv4 | |
5692 | * client will still be allowed to reclaim after it comes back up, | |
5693 | * even if it hasn't yet had a chance to reclaim state this time. | |
5694 | * | |
5695 | */ | |
919b8049 | 5696 | nfsd4_record_grace_done(nn); |
70b28235 BF |
5697 | /* |
5698 | * At this point, NFSv4 clients can still reclaim. But if the | |
5699 | * server crashes, any that have not yet reclaimed will be out | |
5700 | * of luck on the next boot. | |
5701 | * | |
5702 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
5703 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
5704 | * have reclaimed after their first OPEN.) | |
5705 | */ | |
5e1533c7 | 5706 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
5707 | /* |
5708 | * At this point, and once lockd and/or any other containers | |
5709 | * exit their grace period, further reclaims will fail and | |
5710 | * regular locking can resume. | |
5711 | */ | |
a76b4319 N |
5712 | } |
5713 | ||
03f318ca BF |
5714 | /* |
5715 | * If we've waited a lease period but there are still clients trying to | |
5716 | * reclaim, wait a little longer to give them a chance to finish. | |
5717 | */ | |
5718 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
5719 | { | |
20b7d86f AB |
5720 | time64_t double_grace_period_end = nn->boot_time + |
5721 | 2 * nn->nfsd4_lease; | |
03f318ca | 5722 | |
362063a5 SM |
5723 | if (nn->track_reclaim_completes && |
5724 | atomic_read(&nn->nr_reclaim_complete) == | |
5725 | nn->reclaim_str_hashtbl_size) | |
5726 | return false; | |
03f318ca BF |
5727 | if (!nn->somebody_reclaimed) |
5728 | return false; | |
5729 | nn->somebody_reclaimed = false; | |
5730 | /* | |
5731 | * If we've given them *two* lease times to reclaim, and they're | |
5732 | * still not done, give up: | |
5733 | */ | |
20b7d86f | 5734 | if (ktime_get_boottime_seconds() > double_grace_period_end) |
03f318ca BF |
5735 | return false; |
5736 | return true; | |
5737 | } | |
5738 | ||
7f7e7a40 BF |
5739 | struct laundry_time { |
5740 | time64_t cutoff; | |
5741 | time64_t new_timeo; | |
5742 | }; | |
5743 | ||
5744 | static bool state_expired(struct laundry_time *lt, time64_t last_refresh) | |
5745 | { | |
5746 | time64_t time_remaining; | |
5747 | ||
5748 | if (last_refresh < lt->cutoff) | |
5749 | return true; | |
5750 | time_remaining = last_refresh - lt->cutoff; | |
5751 | lt->new_timeo = min(lt->new_timeo, time_remaining); | |
5752 | return false; | |
5753 | } | |
5754 | ||
f4e44b39 DN |
5755 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
5756 | void nfsd4_ssc_init_umount_work(struct nfsd_net *nn) | |
5757 | { | |
5758 | spin_lock_init(&nn->nfsd_ssc_lock); | |
5759 | INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list); | |
5760 | init_waitqueue_head(&nn->nfsd_ssc_waitq); | |
5761 | } | |
5762 | EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work); | |
5763 | ||
5764 | /* | |
5765 | * This is called when nfsd is being shutdown, after all inter_ssc | |
5766 | * cleanup were done, to destroy the ssc delayed unmount list. | |
5767 | */ | |
5768 | static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn) | |
5769 | { | |
f47dc2d3 | 5770 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5771 | struct nfsd4_ssc_umount_item *tmp; |
5772 | ||
5773 | spin_lock(&nn->nfsd_ssc_lock); | |
5774 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5775 | list_del(&ni->nsui_list); | |
5776 | spin_unlock(&nn->nfsd_ssc_lock); | |
5777 | mntput(ni->nsui_vfsmount); | |
5778 | kfree(ni); | |
5779 | spin_lock(&nn->nfsd_ssc_lock); | |
5780 | } | |
5781 | spin_unlock(&nn->nfsd_ssc_lock); | |
5782 | } | |
5783 | ||
5784 | static void nfsd4_ssc_expire_umount(struct nfsd_net *nn) | |
5785 | { | |
5786 | bool do_wakeup = false; | |
8e70bf27 | 5787 | struct nfsd4_ssc_umount_item *ni = NULL; |
f4e44b39 DN |
5788 | struct nfsd4_ssc_umount_item *tmp; |
5789 | ||
5790 | spin_lock(&nn->nfsd_ssc_lock); | |
5791 | list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { | |
5792 | if (time_after(jiffies, ni->nsui_expire)) { | |
5793 | if (refcount_read(&ni->nsui_refcnt) > 1) | |
5794 | continue; | |
5795 | ||
5796 | /* mark being unmount */ | |
5797 | ni->nsui_busy = true; | |
5798 | spin_unlock(&nn->nfsd_ssc_lock); | |
5799 | mntput(ni->nsui_vfsmount); | |
5800 | spin_lock(&nn->nfsd_ssc_lock); | |
5801 | ||
5802 | /* waiters need to start from begin of list */ | |
5803 | list_del(&ni->nsui_list); | |
5804 | kfree(ni); | |
5805 | ||
5806 | /* wakeup ssc_connect waiters */ | |
5807 | do_wakeup = true; | |
5808 | continue; | |
5809 | } | |
5810 | break; | |
5811 | } | |
5812 | if (do_wakeup) | |
5813 | wake_up_all(&nn->nfsd_ssc_waitq); | |
5814 | spin_unlock(&nn->nfsd_ssc_lock); | |
5815 | } | |
5816 | #endif | |
5817 | ||
27431aff | 5818 | /* Check if any lock belonging to this lockowner has any blockers */ |
3d694271 | 5819 | static bool |
27431aff DN |
5820 | nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo) |
5821 | { | |
5822 | struct file_lock_context *ctx; | |
5823 | struct nfs4_ol_stateid *stp; | |
5824 | struct nfs4_file *nf; | |
5825 | ||
5826 | list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) { | |
5827 | nf = stp->st_stid.sc_file; | |
5828 | ctx = nf->fi_inode->i_flctx; | |
5829 | if (!ctx) | |
5830 | continue; | |
5831 | if (locks_owner_has_blockers(ctx, lo)) | |
5832 | return true; | |
5833 | } | |
5834 | return false; | |
5835 | } | |
5836 | ||
5837 | static bool | |
5838 | nfs4_anylock_blockers(struct nfs4_client *clp) | |
3d694271 DN |
5839 | { |
5840 | int i; | |
5841 | struct nfs4_stateowner *so; | |
27431aff | 5842 | struct nfs4_lockowner *lo; |
3d694271 | 5843 | |
27431aff DN |
5844 | if (atomic_read(&clp->cl_delegs_in_recall)) |
5845 | return true; | |
3d694271 DN |
5846 | spin_lock(&clp->cl_lock); |
5847 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
5848 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i], | |
5849 | so_strhash) { | |
5850 | if (so->so_is_open_owner) | |
5851 | continue; | |
27431aff DN |
5852 | lo = lockowner(so); |
5853 | if (nfs4_lockowner_has_blockers(lo)) { | |
5854 | spin_unlock(&clp->cl_lock); | |
5855 | return true; | |
5856 | } | |
3d694271 DN |
5857 | } |
5858 | } | |
5859 | spin_unlock(&clp->cl_lock); | |
5860 | return false; | |
5861 | } | |
5862 | ||
66af2579 DN |
5863 | static void |
5864 | nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist, | |
5865 | struct laundry_time *lt) | |
5866 | { | |
4271c2c0 | 5867 | unsigned int maxreap, reapcnt = 0; |
66af2579 DN |
5868 | struct list_head *pos, *next; |
5869 | struct nfs4_client *clp; | |
5870 | ||
4271c2c0 DN |
5871 | maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ? |
5872 | NFSD_CLIENT_MAX_TRIM_PER_RUN : 0; | |
66af2579 DN |
5873 | INIT_LIST_HEAD(reaplist); |
5874 | spin_lock(&nn->client_lock); | |
5875 | list_for_each_safe(pos, next, &nn->client_lru) { | |
5876 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
5877 | if (clp->cl_state == NFSD4_EXPIRABLE) | |
5878 | goto exp_client; | |
5879 | if (!state_expired(lt, clp->cl_time)) | |
5880 | break; | |
5881 | if (!atomic_read(&clp->cl_rpc_users)) | |
5882 | clp->cl_state = NFSD4_COURTESY; | |
4271c2c0 | 5883 | if (!client_has_state(clp)) |
66af2579 | 5884 | goto exp_client; |
4271c2c0 DN |
5885 | if (!nfs4_anylock_blockers(clp)) |
5886 | if (reapcnt >= maxreap) | |
5887 | continue; | |
66af2579 | 5888 | exp_client: |
4271c2c0 DN |
5889 | if (!mark_client_expired_locked(clp)) { |
5890 | list_add(&clp->cl_lru, reaplist); | |
5891 | reapcnt++; | |
66af2579 DN |
5892 | } |
5893 | } | |
5894 | spin_unlock(&nn->client_lock); | |
5895 | } | |
5896 | ||
20b7d86f | 5897 | static time64_t |
09121281 | 5898 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
5899 | { |
5900 | struct nfs4_client *clp; | |
fe0750e5 | 5901 | struct nfs4_openowner *oo; |
1da177e4 | 5902 | struct nfs4_delegation *dp; |
217526e7 | 5903 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 5904 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 5905 | struct list_head *pos, *next, reaplist; |
7f7e7a40 BF |
5906 | struct laundry_time lt = { |
5907 | .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease, | |
5908 | .new_timeo = nn->nfsd4_lease | |
5909 | }; | |
624322f1 OK |
5910 | struct nfs4_cpntf_state *cps; |
5911 | copy_stateid_t *cps_t; | |
5912 | int i; | |
1da177e4 | 5913 | |
03f318ca | 5914 | if (clients_still_reclaiming(nn)) { |
7f7e7a40 | 5915 | lt.new_timeo = 0; |
03f318ca BF |
5916 | goto out; |
5917 | } | |
12760c66 | 5918 | nfsd4_end_grace(nn); |
624322f1 OK |
5919 | |
5920 | spin_lock(&nn->s2s_cp_lock); | |
5921 | idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { | |
5922 | cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); | |
5923 | if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID && | |
7f7e7a40 | 5924 | state_expired(<, cps->cpntf_time)) |
624322f1 OK |
5925 | _free_cpntf_state_locked(nn, cps); |
5926 | } | |
5927 | spin_unlock(&nn->s2s_cp_lock); | |
66af2579 | 5928 | nfs4_get_client_reaplist(nn, &reaplist, <); |
36acb66b BH |
5929 | list_for_each_safe(pos, next, &reaplist) { |
5930 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
dd5e3fbc | 5931 | trace_nfsd_clid_purged(&clp->cl_clientid); |
4864af97 | 5932 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
5933 | expire_client(clp); |
5934 | } | |
cdc97505 | 5935 | spin_lock(&state_lock); |
e8c69d17 | 5936 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5937 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
7f7e7a40 | 5938 | if (!state_expired(<, dp->dl_time)) |
1da177e4 | 5939 | break; |
3fcbbd24 | 5940 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 5941 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 5942 | } |
cdc97505 | 5943 | spin_unlock(&state_lock); |
2d4a532d JL |
5944 | while (!list_empty(&reaplist)) { |
5945 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
5946 | dl_recall_lru); | |
5947 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5948 | revoke_delegation(dp); |
1da177e4 | 5949 | } |
217526e7 JL |
5950 | |
5951 | spin_lock(&nn->client_lock); | |
5952 | while (!list_empty(&nn->close_lru)) { | |
5953 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
5954 | oo_close_lru); | |
7f7e7a40 | 5955 | if (!state_expired(<, oo->oo_time)) |
1da177e4 | 5956 | break; |
217526e7 JL |
5957 | list_del_init(&oo->oo_close_lru); |
5958 | stp = oo->oo_last_closed_stid; | |
5959 | oo->oo_last_closed_stid = NULL; | |
5960 | spin_unlock(&nn->client_lock); | |
5961 | nfs4_put_stid(&stp->st_stid); | |
5962 | spin_lock(&nn->client_lock); | |
1da177e4 | 5963 | } |
217526e7 JL |
5964 | spin_unlock(&nn->client_lock); |
5965 | ||
7919d0a2 JL |
5966 | /* |
5967 | * It's possible for a client to try and acquire an already held lock | |
5968 | * that is being held for a long time, and then lose interest in it. | |
5969 | * So, we clean out any un-revisited request after a lease period | |
5970 | * under the assumption that the client is no longer interested. | |
5971 | * | |
5972 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
5973 | * notifications and must continue to poll for locks, even when the | |
5974 | * server supports them. Thus this shouldn't lead to clients blocking | |
5975 | * indefinitely once the lock does become free. | |
5976 | */ | |
5977 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 5978 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
5979 | while (!list_empty(&nn->blocked_locks_lru)) { |
5980 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
5981 | struct nfsd4_blocked_lock, nbl_lru); | |
7f7e7a40 | 5982 | if (!state_expired(<, nbl->nbl_time)) |
7919d0a2 | 5983 | break; |
7919d0a2 JL |
5984 | list_move(&nbl->nbl_lru, &reaplist); |
5985 | list_del_init(&nbl->nbl_list); | |
5986 | } | |
0cc11a61 | 5987 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
5988 | |
5989 | while (!list_empty(&reaplist)) { | |
64ebe124 | 5990 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
5991 | struct nfsd4_blocked_lock, nbl_lru); |
5992 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
5993 | free_blocked_lock(nbl); |
5994 | } | |
f4e44b39 DN |
5995 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
5996 | /* service the server-to-server copy delayed unmount list */ | |
5997 | nfsd4_ssc_expire_umount(nn); | |
5998 | #endif | |
03f318ca | 5999 | out: |
7f7e7a40 | 6000 | return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
1da177e4 LT |
6001 | } |
6002 | ||
a254b246 | 6003 | static void laundromat_main(struct work_struct *); |
a254b246 HH |
6004 | |
6005 | static void | |
09121281 | 6006 | laundromat_main(struct work_struct *laundry) |
1da177e4 | 6007 | { |
20b7d86f | 6008 | time64_t t; |
2e55f3ab | 6009 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
6010 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
6011 | laundromat_work); | |
1da177e4 | 6012 | |
09121281 | 6013 | t = nfs4_laundromat(nn); |
09121281 | 6014 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
6015 | } |
6016 | ||
8fcd461d | 6017 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 6018 | { |
8fcd461d | 6019 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
6020 | return nfserr_bad_stateid; |
6021 | return nfs_ok; | |
1da177e4 LT |
6022 | } |
6023 | ||
1da177e4 | 6024 | static |
dcef0413 | 6025 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 6026 | { |
b37ad28b | 6027 | __be32 status = nfserr_openmode; |
1da177e4 | 6028 | |
02921914 BF |
6029 | /* For lock stateid's, we test the parent open, not the lock: */ |
6030 | if (stp->st_openstp) | |
6031 | stp = stp->st_openstp; | |
82c5ff1b | 6032 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 6033 | goto out; |
82c5ff1b | 6034 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
6035 | goto out; |
6036 | status = nfs_ok; | |
6037 | out: | |
6038 | return status; | |
6039 | } | |
6040 | ||
b37ad28b | 6041 | static inline __be32 |
5ccb0066 | 6042 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 6043 | { |
203a8c8e | 6044 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 6045 | return nfs_ok; |
c87fb4a3 | 6046 | else if (opens_in_grace(net)) { |
25985edc | 6047 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
6048 | * conflicting state; so we must wait out the grace period. */ |
6049 | return nfserr_grace; | |
6050 | } else if (flags & WR_STATE) | |
6051 | return nfs4_share_conflict(current_fh, | |
6052 | NFS4_SHARE_DENY_WRITE); | |
6053 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
6054 | return nfs4_share_conflict(current_fh, | |
6055 | NFS4_SHARE_DENY_READ); | |
6056 | } | |
6057 | ||
57b7b43b | 6058 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 6059 | { |
6668958f AA |
6060 | /* |
6061 | * When sessions are used the stateid generation number is ignored | |
6062 | * when it is zero. | |
6063 | */ | |
28dde241 | 6064 | if (has_session && in->si_generation == 0) |
81b82965 BF |
6065 | return nfs_ok; |
6066 | ||
6067 | if (in->si_generation == ref->si_generation) | |
6068 | return nfs_ok; | |
6668958f | 6069 | |
0836f587 | 6070 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 6071 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
6072 | return nfserr_bad_stateid; |
6073 | /* | |
81b82965 BF |
6074 | * However, we could see a stateid from the past, even from a |
6075 | * non-buggy client. For example, if the client sends a lock | |
6076 | * while some IO is outstanding, the lock may bump si_generation | |
6077 | * while the IO is still in flight. The client could avoid that | |
6078 | * situation by waiting for responses on all the IO requests, | |
6079 | * but better performance may result in retrying IO that | |
6080 | * receives an old_stateid error if requests are rarely | |
6081 | * reordered in flight: | |
0836f587 | 6082 | */ |
81b82965 | 6083 | return nfserr_old_stateid; |
0836f587 BF |
6084 | } |
6085 | ||
03da3169 TM |
6086 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
6087 | { | |
6088 | __be32 ret; | |
6089 | ||
6090 | spin_lock(&s->sc_lock); | |
6091 | ret = nfsd4_verify_open_stid(s); | |
6092 | if (ret == nfs_ok) | |
6093 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
6094 | spin_unlock(&s->sc_lock); | |
6095 | return ret; | |
6096 | } | |
6097 | ||
ebe9cb3b CH |
6098 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
6099 | { | |
6100 | if (ols->st_stateowner->so_is_open_owner && | |
6101 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
6102 | return nfserr_bad_stateid; | |
6103 | return nfs_ok; | |
6104 | } | |
6105 | ||
7df302f7 | 6106 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 6107 | { |
97b7e3b6 | 6108 | struct nfs4_stid *s; |
1af71cc8 | 6109 | __be32 status = nfserr_bad_stateid; |
17456804 | 6110 | |
ae254dac AE |
6111 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6112 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 6113 | return status; |
663e36f0 | 6114 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) |
1af71cc8 | 6115 | return status; |
1af71cc8 JL |
6116 | spin_lock(&cl->cl_lock); |
6117 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 6118 | if (!s) |
1af71cc8 | 6119 | goto out_unlock; |
03da3169 | 6120 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 6121 | if (status) |
1af71cc8 | 6122 | goto out_unlock; |
23340032 BF |
6123 | switch (s->sc_type) { |
6124 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
6125 | status = nfs_ok; |
6126 | break; | |
3bd64a5b | 6127 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
6128 | status = nfserr_deleg_revoked; |
6129 | break; | |
23340032 BF |
6130 | case NFS4_OPEN_STID: |
6131 | case NFS4_LOCK_STID: | |
ebe9cb3b | 6132 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 6133 | break; |
23340032 BF |
6134 | default: |
6135 | printk("unknown stateid type %x\n", s->sc_type); | |
df561f66 | 6136 | fallthrough; |
23340032 | 6137 | case NFS4_CLOSED_STID: |
b0fc29d6 | 6138 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 6139 | status = nfserr_bad_stateid; |
23340032 | 6140 | } |
1af71cc8 JL |
6141 | out_unlock: |
6142 | spin_unlock(&cl->cl_lock); | |
6143 | return status; | |
17456804 BS |
6144 | } |
6145 | ||
cd61c522 | 6146 | __be32 |
2dd6e458 TM |
6147 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
6148 | stateid_t *stateid, unsigned char typemask, | |
6149 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 6150 | { |
0eb6f20a | 6151 | __be32 status; |
95da1b3a AE |
6152 | bool return_revoked = false; |
6153 | ||
6154 | /* | |
6155 | * only return revoked delegations if explicitly asked. | |
6156 | * otherwise we report revoked or bad_stateid status. | |
6157 | */ | |
6158 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
6159 | return_revoked = true; | |
6160 | else if (typemask & NFS4_DELEG_STID) | |
6161 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 6162 | |
ae254dac AE |
6163 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
6164 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 6165 | return nfserr_bad_stateid; |
f71475ba | 6166 | status = set_client(&stateid->si_opaque.so_clid, cstate, nn); |
a8a7c677 | 6167 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 6168 | if (cstate->session) |
a8a7c677 | 6169 | return nfserr_bad_stateid; |
38c2f4b1 | 6170 | return nfserr_stale_stateid; |
a8a7c677 | 6171 | } |
0eb6f20a BF |
6172 | if (status) |
6173 | return status; | |
4b24ca7d | 6174 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
6175 | if (!*s) |
6176 | return nfserr_bad_stateid; | |
95da1b3a AE |
6177 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
6178 | nfs4_put_stid(*s); | |
6179 | if (cstate->minorversion) | |
6180 | return nfserr_deleg_revoked; | |
6181 | return nfserr_bad_stateid; | |
6182 | } | |
38c2f4b1 | 6183 | return nfs_ok; |
38c2f4b1 BF |
6184 | } |
6185 | ||
eb82dd39 | 6186 | static struct nfsd_file * |
a0649b2d CH |
6187 | nfs4_find_file(struct nfs4_stid *s, int flags) |
6188 | { | |
af90f707 CH |
6189 | if (!s) |
6190 | return NULL; | |
6191 | ||
a0649b2d CH |
6192 | switch (s->sc_type) { |
6193 | case NFS4_DELEG_STID: | |
6194 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
6195 | return NULL; | |
eb82dd39 | 6196 | return nfsd_file_get(s->sc_file->fi_deleg_file); |
a0649b2d CH |
6197 | case NFS4_OPEN_STID: |
6198 | case NFS4_LOCK_STID: | |
6199 | if (flags & RD_STATE) | |
6200 | return find_readable_file(s->sc_file); | |
6201 | else | |
6202 | return find_writeable_file(s->sc_file); | |
a0649b2d CH |
6203 | } |
6204 | ||
6205 | return NULL; | |
6206 | } | |
6207 | ||
6208 | static __be32 | |
d8836f77 | 6209 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
6210 | { |
6211 | __be32 status; | |
6212 | ||
a0649b2d CH |
6213 | status = nfsd4_check_openowner_confirmed(ols); |
6214 | if (status) | |
6215 | return status; | |
6216 | return nfs4_check_openmode(ols, flags); | |
6217 | } | |
6218 | ||
af90f707 CH |
6219 | static __be32 |
6220 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5c4583b2 | 6221 | struct nfsd_file **nfp, int flags) |
af90f707 CH |
6222 | { |
6223 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
eb82dd39 | 6224 | struct nfsd_file *nf; |
af90f707 CH |
6225 | __be32 status; |
6226 | ||
eb82dd39 JL |
6227 | nf = nfs4_find_file(s, flags); |
6228 | if (nf) { | |
af90f707 CH |
6229 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
6230 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5c4583b2 JL |
6231 | if (status) { |
6232 | nfsd_file_put(nf); | |
eb82dd39 | 6233 | goto out; |
5c4583b2 | 6234 | } |
af90f707 | 6235 | } else { |
eb82dd39 | 6236 | status = nfsd_file_acquire(rqstp, fhp, acc, &nf); |
af90f707 CH |
6237 | if (status) |
6238 | return status; | |
af90f707 | 6239 | } |
5c4583b2 | 6240 | *nfp = nf; |
eb82dd39 | 6241 | out: |
eb82dd39 | 6242 | return status; |
af90f707 | 6243 | } |
624322f1 OK |
6244 | static void |
6245 | _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6246 | { | |
6247 | WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID); | |
6248 | if (!refcount_dec_and_test(&cps->cp_stateid.sc_count)) | |
6249 | return; | |
6250 | list_del(&cps->cp_list); | |
6251 | idr_remove(&nn->s2s_cp_stateids, | |
6252 | cps->cp_stateid.stid.si_opaque.so_id); | |
6253 | kfree(cps); | |
6254 | } | |
b7342204 OK |
6255 | /* |
6256 | * A READ from an inter server to server COPY will have a | |
6257 | * copy stateid. Look up the copy notify stateid from the | |
6258 | * idr structure and take a reference on it. | |
6259 | */ | |
ce0887ac OK |
6260 | __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, |
6261 | struct nfs4_client *clp, | |
6262 | struct nfs4_cpntf_state **cps) | |
b7342204 OK |
6263 | { |
6264 | copy_stateid_t *cps_t; | |
6265 | struct nfs4_cpntf_state *state = NULL; | |
6266 | ||
6267 | if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) | |
6268 | return nfserr_bad_stateid; | |
6269 | spin_lock(&nn->s2s_cp_lock); | |
6270 | cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); | |
6271 | if (cps_t) { | |
6272 | state = container_of(cps_t, struct nfs4_cpntf_state, | |
6273 | cp_stateid); | |
5277a79e DC |
6274 | if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) { |
6275 | state = NULL; | |
6276 | goto unlock; | |
6277 | } | |
ce0887ac OK |
6278 | if (!clp) |
6279 | refcount_inc(&state->cp_stateid.sc_count); | |
6280 | else | |
6281 | _free_cpntf_state_locked(nn, state); | |
b7342204 | 6282 | } |
5277a79e | 6283 | unlock: |
b7342204 OK |
6284 | spin_unlock(&nn->s2s_cp_lock); |
6285 | if (!state) | |
6286 | return nfserr_bad_stateid; | |
ce0887ac OK |
6287 | if (!clp && state) |
6288 | *cps = state; | |
b7342204 OK |
6289 | return 0; |
6290 | } | |
6291 | ||
6292 | static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, | |
6293 | struct nfs4_stid **stid) | |
6294 | { | |
6295 | __be32 status; | |
6296 | struct nfs4_cpntf_state *cps = NULL; | |
47fdb22d | 6297 | struct nfs4_client *found; |
b7342204 | 6298 | |
ce0887ac | 6299 | status = manage_cpntf_state(nn, st, NULL, &cps); |
b7342204 OK |
6300 | if (status) |
6301 | return status; | |
6302 | ||
20b7d86f | 6303 | cps->cpntf_time = ktime_get_boottime_seconds(); |
47fdb22d BF |
6304 | |
6305 | status = nfserr_expired; | |
6306 | found = lookup_clientid(&cps->cp_p_clid, true, nn); | |
6307 | if (!found) | |
b7342204 | 6308 | goto out; |
47fdb22d BF |
6309 | |
6310 | *stid = find_stateid_by_type(found, &cps->cp_p_stateid, | |
6311 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID); | |
6312 | if (*stid) | |
6313 | status = nfs_ok; | |
6314 | else | |
6315 | status = nfserr_bad_stateid; | |
6316 | ||
6317 | put_client_renew(found); | |
b7342204 OK |
6318 | out: |
6319 | nfs4_put_cpntf_state(nn, cps); | |
6320 | return status; | |
6321 | } | |
624322f1 OK |
6322 | |
6323 | void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
6324 | { | |
6325 | spin_lock(&nn->s2s_cp_lock); | |
6326 | _free_cpntf_state_locked(nn, cps); | |
6327 | spin_unlock(&nn->s2s_cp_lock); | |
6328 | } | |
af90f707 | 6329 | |
1da177e4 | 6330 | /* |
a0649b2d CH |
6331 | * Checks for stateid operations |
6332 | */ | |
b37ad28b | 6333 | __be32 |
af90f707 | 6334 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed | 6335 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
624322f1 OK |
6336 | stateid_t *stateid, int flags, struct nfsd_file **nfp, |
6337 | struct nfs4_stid **cstid) | |
1da177e4 | 6338 | { |
af90f707 | 6339 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 6340 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 6341 | struct nfs4_stid *s = NULL; |
b37ad28b | 6342 | __be32 status; |
1da177e4 | 6343 | |
5c4583b2 JL |
6344 | if (nfp) |
6345 | *nfp = NULL; | |
1da177e4 | 6346 | |
af90f707 | 6347 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
074b07d9 BF |
6348 | if (cstid) |
6349 | status = nfserr_bad_stateid; | |
6350 | else | |
6351 | status = check_special_stateids(net, fhp, stateid, | |
6352 | flags); | |
af90f707 CH |
6353 | goto done; |
6354 | } | |
1da177e4 | 6355 | |
2dd6e458 | 6356 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 6357 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 6358 | &s, nn); |
b7342204 OK |
6359 | if (status == nfserr_bad_stateid) |
6360 | status = find_cpntf_state(nn, stateid, &s); | |
38c2f4b1 | 6361 | if (status) |
c2d1d6a8 | 6362 | return status; |
03da3169 | 6363 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 6364 | nfsd4_has_session(cstate)); |
69064a27 BF |
6365 | if (status) |
6366 | goto out; | |
a0649b2d | 6367 | |
f7a4d872 BF |
6368 | switch (s->sc_type) { |
6369 | case NFS4_DELEG_STID: | |
a0649b2d | 6370 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
6371 | break; |
6372 | case NFS4_OPEN_STID: | |
6373 | case NFS4_LOCK_STID: | |
d8836f77 | 6374 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
6375 | break; |
6376 | default: | |
14bcab1a | 6377 | status = nfserr_bad_stateid; |
a0649b2d CH |
6378 | break; |
6379 | } | |
8fcd461d JL |
6380 | if (status) |
6381 | goto out; | |
6382 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 6383 | |
af90f707 | 6384 | done: |
5c4583b2 JL |
6385 | if (status == nfs_ok && nfp) |
6386 | status = nfs4_check_file(rqstp, fhp, s, nfp, flags); | |
1da177e4 | 6387 | out: |
624322f1 OK |
6388 | if (s) { |
6389 | if (!status && cstid) | |
6390 | *cstid = s; | |
6391 | else | |
6392 | nfs4_put_stid(s); | |
6393 | } | |
1da177e4 LT |
6394 | return status; |
6395 | } | |
6396 | ||
17456804 BS |
6397 | /* |
6398 | * Test if the stateid is valid | |
6399 | */ | |
6400 | __be32 | |
6401 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6402 | union nfsd4_op_u *u) |
17456804 | 6403 | { |
eb69853d | 6404 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 | 6405 | struct nfsd4_test_stateid_id *stateid; |
ec59659b | 6406 | struct nfs4_client *cl = cstate->clp; |
03cfb420 | 6407 | |
03cfb420 | 6408 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
6409 | stateid->ts_id_status = |
6410 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 6411 | |
17456804 BS |
6412 | return nfs_ok; |
6413 | } | |
6414 | ||
42691398 CL |
6415 | static __be32 |
6416 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
6417 | { | |
6418 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
6419 | __be32 ret; | |
6420 | ||
659aefb6 TM |
6421 | ret = nfsd4_lock_ol_stateid(stp); |
6422 | if (ret) | |
6423 | goto out_put_stid; | |
42691398 CL |
6424 | |
6425 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
6426 | if (ret) | |
6427 | goto out; | |
6428 | ||
6429 | ret = nfserr_locks_held; | |
6430 | if (check_for_locks(stp->st_stid.sc_file, | |
6431 | lockowner(stp->st_stateowner))) | |
6432 | goto out; | |
6433 | ||
6434 | release_lock_stateid(stp); | |
6435 | ret = nfs_ok; | |
6436 | ||
6437 | out: | |
6438 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 6439 | out_put_stid: |
42691398 CL |
6440 | nfs4_put_stid(s); |
6441 | return ret; | |
6442 | } | |
6443 | ||
e1ca12df BS |
6444 | __be32 |
6445 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 6446 | union nfsd4_op_u *u) |
e1ca12df | 6447 | { |
eb69853d | 6448 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 6449 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 6450 | struct nfs4_stid *s; |
3bd64a5b | 6451 | struct nfs4_delegation *dp; |
ec59659b | 6452 | struct nfs4_client *cl = cstate->clp; |
2da1cec7 | 6453 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 6454 | |
1af71cc8 JL |
6455 | spin_lock(&cl->cl_lock); |
6456 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 6457 | if (!s) |
1af71cc8 | 6458 | goto out_unlock; |
03da3169 | 6459 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
6460 | switch (s->sc_type) { |
6461 | case NFS4_DELEG_STID: | |
e1ca12df | 6462 | ret = nfserr_locks_held; |
1af71cc8 | 6463 | break; |
2da1cec7 | 6464 | case NFS4_OPEN_STID: |
2da1cec7 BF |
6465 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
6466 | if (ret) | |
1af71cc8 JL |
6467 | break; |
6468 | ret = nfserr_locks_held; | |
f7a4d872 | 6469 | break; |
1af71cc8 | 6470 | case NFS4_LOCK_STID: |
03da3169 | 6471 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 6472 | refcount_inc(&s->sc_count); |
1af71cc8 | 6473 | spin_unlock(&cl->cl_lock); |
42691398 | 6474 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 6475 | goto out; |
3bd64a5b | 6476 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 6477 | spin_unlock(&s->sc_lock); |
3bd64a5b | 6478 | dp = delegstateid(s); |
2d4a532d JL |
6479 | list_del_init(&dp->dl_recall_lru); |
6480 | spin_unlock(&cl->cl_lock); | |
6011695d | 6481 | nfs4_put_stid(s); |
3bd64a5b | 6482 | ret = nfs_ok; |
1af71cc8 JL |
6483 | goto out; |
6484 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 6485 | } |
03da3169 | 6486 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
6487 | out_unlock: |
6488 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 6489 | out: |
e1ca12df BS |
6490 | return ret; |
6491 | } | |
6492 | ||
4c4cd222 N |
6493 | static inline int |
6494 | setlkflg (int type) | |
6495 | { | |
6496 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
6497 | RD_STATE : WR_STATE; | |
6498 | } | |
1da177e4 | 6499 | |
dcef0413 | 6500 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
6501 | { |
6502 | struct svc_fh *current_fh = &cstate->current_fh; | |
6503 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
6504 | __be32 status; | |
6505 | ||
c0a5d93e BF |
6506 | status = nfsd4_check_seqid(cstate, sop, seqid); |
6507 | if (status) | |
6508 | return status; | |
9271d7e5 TM |
6509 | status = nfsd4_lock_ol_stateid(stp); |
6510 | if (status != nfs_ok) | |
6511 | return status; | |
f7a4d872 | 6512 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
6513 | if (status == nfs_ok) |
6514 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
6515 | if (status != nfs_ok) | |
feb9dad5 | 6516 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 6517 | return status; |
c0a5d93e BF |
6518 | } |
6519 | ||
1da177e4 LT |
6520 | /* |
6521 | * Checks for sequence id mutating operations. | |
6522 | */ | |
b37ad28b | 6523 | static __be32 |
dd453dfd | 6524 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 6525 | stateid_t *stateid, char typemask, |
3320fef1 SK |
6526 | struct nfs4_ol_stateid **stpp, |
6527 | struct nfsd_net *nn) | |
1da177e4 | 6528 | { |
0836f587 | 6529 | __be32 status; |
38c2f4b1 | 6530 | struct nfs4_stid *s; |
e17f99b7 | 6531 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 6532 | |
dd5e3fbc | 6533 | trace_nfsd_preprocess(seqid, stateid); |
3a4f98bb | 6534 | |
1da177e4 | 6535 | *stpp = NULL; |
2dd6e458 | 6536 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
6537 | if (status) |
6538 | return status; | |
e17f99b7 | 6539 | stp = openlockstateid(s); |
58fb12e6 | 6540 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 6541 | |
e17f99b7 | 6542 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 6543 | if (!status) |
e17f99b7 | 6544 | *stpp = stp; |
fd911011 TM |
6545 | else |
6546 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 6547 | return status; |
c0a5d93e | 6548 | } |
39325bd0 | 6549 | |
3320fef1 SK |
6550 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
6551 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
6552 | { |
6553 | __be32 status; | |
6554 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 6555 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6556 | |
c0a5d93e | 6557 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 6558 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
6559 | if (status) |
6560 | return status; | |
4cbfc9f7 TM |
6561 | oo = openowner(stp->st_stateowner); |
6562 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 6563 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 6564 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 6565 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
6566 | } |
6567 | *stpp = stp; | |
3a4f98bb | 6568 | return nfs_ok; |
1da177e4 LT |
6569 | } |
6570 | ||
b37ad28b | 6571 | __be32 |
ca364317 | 6572 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6573 | union nfsd4_op_u *u) |
1da177e4 | 6574 | { |
eb69853d | 6575 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 6576 | __be32 status; |
fe0750e5 | 6577 | struct nfs4_openowner *oo; |
dcef0413 | 6578 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6579 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6580 | |
a6a9f18f AV |
6581 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
6582 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6583 | |
ca364317 | 6584 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
6585 | if (status) |
6586 | return status; | |
1da177e4 | 6587 | |
9072d5c6 | 6588 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 6589 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 6590 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 6591 | if (status) |
68b66e82 | 6592 | goto out; |
fe0750e5 | 6593 | oo = openowner(stp->st_stateowner); |
68b66e82 | 6594 | status = nfserr_bad_stateid; |
35a92fe8 | 6595 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 6596 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 6597 | goto put_stateid; |
35a92fe8 | 6598 | } |
dad1c067 | 6599 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 6600 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 6601 | mutex_unlock(&stp->st_mutex); |
dd5e3fbc | 6602 | trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid); |
2a4317c5 | 6603 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 6604 | status = nfs_ok; |
2585fc79 TM |
6605 | put_stateid: |
6606 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6607 | out: |
9411b1d4 | 6608 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6609 | return status; |
6610 | } | |
6611 | ||
6409a5a6 | 6612 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 6613 | { |
82c5ff1b | 6614 | if (!test_access(access, stp)) |
6409a5a6 | 6615 | return; |
11b9164a | 6616 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 6617 | clear_access(access, stp); |
6409a5a6 | 6618 | } |
f197c271 | 6619 | |
6409a5a6 BF |
6620 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
6621 | { | |
6622 | switch (to_access) { | |
6623 | case NFS4_SHARE_ACCESS_READ: | |
6624 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
6625 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6626 | break; | |
6627 | case NFS4_SHARE_ACCESS_WRITE: | |
6628 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
6629 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6630 | break; | |
6631 | case NFS4_SHARE_ACCESS_BOTH: | |
6632 | break; | |
6633 | default: | |
063b0fb9 | 6634 | WARN_ON_ONCE(1); |
1da177e4 LT |
6635 | } |
6636 | } | |
6637 | ||
b37ad28b | 6638 | __be32 |
ca364317 | 6639 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 6640 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 6641 | { |
eb69853d | 6642 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 6643 | __be32 status; |
dcef0413 | 6644 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6645 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6646 | |
a6a9f18f AV |
6647 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
6648 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6649 | |
c30e92df | 6650 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
6651 | if (od->od_deleg_want) |
6652 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
6653 | od->od_deleg_want); | |
1da177e4 | 6654 | |
c0a5d93e | 6655 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 6656 | &od->od_stateid, &stp, nn); |
9072d5c6 | 6657 | if (status) |
1da177e4 | 6658 | goto out; |
1da177e4 | 6659 | status = nfserr_inval; |
82c5ff1b | 6660 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 6661 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 6662 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 6663 | goto put_stateid; |
1da177e4 | 6664 | } |
ce0fc43c | 6665 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 6666 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 6667 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 6668 | goto put_stateid; |
1da177e4 | 6669 | } |
6409a5a6 | 6670 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 6671 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 6672 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 6673 | status = nfs_ok; |
0667b1e9 | 6674 | put_stateid: |
feb9dad5 | 6675 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 6676 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6677 | out: |
9411b1d4 | 6678 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6679 | return status; |
6680 | } | |
6681 | ||
f7a4d872 BF |
6682 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
6683 | { | |
acf9295b | 6684 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 6685 | bool unhashed; |
d83017f9 | 6686 | LIST_HEAD(reaplist); |
acf9295b | 6687 | |
2c41beb0 | 6688 | spin_lock(&clp->cl_lock); |
e8568739 | 6689 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 6690 | |
d83017f9 | 6691 | if (clp->cl_minorversion) { |
e8568739 JL |
6692 | if (unhashed) |
6693 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
6694 | spin_unlock(&clp->cl_lock); |
6695 | free_ol_stateid_reaplist(&reaplist); | |
6696 | } else { | |
6697 | spin_unlock(&clp->cl_lock); | |
6698 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
6699 | if (unhashed) |
6700 | move_to_close_lru(s, clp->net); | |
d83017f9 | 6701 | } |
38c387b5 BF |
6702 | } |
6703 | ||
1da177e4 LT |
6704 | /* |
6705 | * nfs4_unlock_state() called after encode | |
6706 | */ | |
b37ad28b | 6707 | __be32 |
ca364317 | 6708 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6709 | union nfsd4_op_u *u) |
1da177e4 | 6710 | { |
eb69853d | 6711 | struct nfsd4_close *close = &u->close; |
b37ad28b | 6712 | __be32 status; |
dcef0413 | 6713 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
6714 | struct net *net = SVC_NET(rqstp); |
6715 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 6716 | |
a6a9f18f AV |
6717 | dprintk("NFSD: nfsd4_close on file %pd\n", |
6718 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6719 | |
f7a4d872 BF |
6720 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
6721 | &close->cl_stateid, | |
6722 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 6723 | &stp, nn); |
9411b1d4 | 6724 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 6725 | if (status) |
1da177e4 | 6726 | goto out; |
15ca08d3 TM |
6727 | |
6728 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
6729 | |
6730 | /* | |
6731 | * Technically we don't _really_ have to increment or copy it, since | |
6732 | * it should just be gone after this operation and we clobber the | |
6733 | * copied value below, but we continue to do so here just to ensure | |
6734 | * that racing ops see that there was a state change. | |
6735 | */ | |
9767feb2 | 6736 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 6737 | |
f7a4d872 | 6738 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 6739 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 6740 | |
bd2decac JL |
6741 | /* v4.1+ suggests that we send a special stateid in here, since the |
6742 | * clients should just ignore this anyway. Since this is not useful | |
6743 | * for v4.0 clients either, we set it to the special close_stateid | |
6744 | * universally. | |
6745 | * | |
6746 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
6747 | */ | |
6748 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 6749 | |
8a0b589d TM |
6750 | /* put reference from nfs4_preprocess_seqid_op */ |
6751 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6752 | out: |
1da177e4 LT |
6753 | return status; |
6754 | } | |
6755 | ||
b37ad28b | 6756 | __be32 |
ca364317 | 6757 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6758 | union nfsd4_op_u *u) |
1da177e4 | 6759 | { |
eb69853d | 6760 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
6761 | struct nfs4_delegation *dp; |
6762 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 6763 | struct nfs4_stid *s; |
b37ad28b | 6764 | __be32 status; |
3320fef1 | 6765 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6766 | |
ca364317 | 6767 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 6768 | return status; |
1da177e4 | 6769 | |
2dd6e458 | 6770 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 6771 | if (status) |
203a8c8e | 6772 | goto out; |
38c2f4b1 | 6773 | dp = delegstateid(s); |
03da3169 | 6774 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 6775 | if (status) |
fd911011 | 6776 | goto put_stateid; |
203a8c8e | 6777 | |
3bd64a5b | 6778 | destroy_delegation(dp); |
fd911011 TM |
6779 | put_stateid: |
6780 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
6781 | out: |
6782 | return status; | |
6783 | } | |
6784 | ||
87df4de8 BH |
6785 | /* last octet in a range */ |
6786 | static inline u64 | |
6787 | last_byte_offset(u64 start, u64 len) | |
6788 | { | |
6789 | u64 end; | |
6790 | ||
063b0fb9 | 6791 | WARN_ON_ONCE(!len); |
87df4de8 BH |
6792 | end = start + len; |
6793 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
6794 | } | |
6795 | ||
1da177e4 LT |
6796 | /* |
6797 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
6798 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
6799 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
6800 | * locking, this prevents us from being completely protocol-compliant. The | |
6801 | * real solution to this problem is to start using unsigned file offsets in | |
6802 | * the VFS, but this is a very deep change! | |
6803 | */ | |
6804 | static inline void | |
6805 | nfs4_transform_lock_offset(struct file_lock *lock) | |
6806 | { | |
6807 | if (lock->fl_start < 0) | |
6808 | lock->fl_start = OFFSET_MAX; | |
6809 | if (lock->fl_end < 0) | |
6810 | lock->fl_end = OFFSET_MAX; | |
6811 | } | |
6812 | ||
cae80b30 | 6813 | static fl_owner_t |
35aff067 | 6814 | nfsd4_lm_get_owner(fl_owner_t owner) |
aef9583b | 6815 | { |
cae80b30 JL |
6816 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
6817 | ||
6818 | nfs4_get_stateowner(&lo->lo_owner); | |
6819 | return owner; | |
aef9583b KM |
6820 | } |
6821 | ||
cae80b30 | 6822 | static void |
35aff067 | 6823 | nfsd4_lm_put_owner(fl_owner_t owner) |
aef9583b | 6824 | { |
cae80b30 | 6825 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 6826 | |
cae80b30 | 6827 | if (lo) |
aef9583b | 6828 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
6829 | } |
6830 | ||
27431aff DN |
6831 | /* return pointer to struct nfs4_client if client is expirable */ |
6832 | static bool | |
6833 | nfsd4_lm_lock_expirable(struct file_lock *cfl) | |
6834 | { | |
6835 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner; | |
6836 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
6837 | struct nfsd_net *nn; | |
6838 | ||
6839 | if (try_to_expire_client(clp)) { | |
6840 | nn = net_generic(clp->net, nfsd_net_id); | |
6841 | mod_delayed_work(laundry_wq, &nn->laundromat_work, 0); | |
6842 | return true; | |
6843 | } | |
6844 | return false; | |
6845 | } | |
6846 | ||
6847 | /* schedule laundromat to run immediately and wait for it to complete */ | |
6848 | static void | |
6849 | nfsd4_lm_expire_lock(void) | |
6850 | { | |
6851 | flush_workqueue(laundry_wq); | |
6852 | } | |
6853 | ||
76d348fa JL |
6854 | static void |
6855 | nfsd4_lm_notify(struct file_lock *fl) | |
6856 | { | |
6857 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
6858 | struct net *net = lo->lo_owner.so_client->net; | |
6859 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6860 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
6861 | struct nfsd4_blocked_lock, nbl_lock); | |
6862 | bool queue = false; | |
6863 | ||
7919d0a2 | 6864 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 6865 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
6866 | if (!list_empty(&nbl->nbl_list)) { |
6867 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 6868 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
6869 | queue = true; |
6870 | } | |
0cc11a61 | 6871 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 6872 | |
2cde7f81 CL |
6873 | if (queue) { |
6874 | trace_nfsd_cb_notify_lock(lo, nbl); | |
76d348fa | 6875 | nfsd4_run_cb(&nbl->nbl_cb); |
2cde7f81 | 6876 | } |
76d348fa JL |
6877 | } |
6878 | ||
7b021967 | 6879 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
27431aff | 6880 | .lm_mod_owner = THIS_MODULE, |
76d348fa | 6881 | .lm_notify = nfsd4_lm_notify, |
35aff067 CL |
6882 | .lm_get_owner = nfsd4_lm_get_owner, |
6883 | .lm_put_owner = nfsd4_lm_put_owner, | |
27431aff DN |
6884 | .lm_lock_expirable = nfsd4_lm_lock_expirable, |
6885 | .lm_expire_lock = nfsd4_lm_expire_lock, | |
d5b9026a | 6886 | }; |
1da177e4 LT |
6887 | |
6888 | static inline void | |
6889 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
6890 | { | |
fe0750e5 | 6891 | struct nfs4_lockowner *lo; |
1da177e4 | 6892 | |
d5b9026a | 6893 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 | 6894 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
6f4859b8 BF |
6895 | xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, |
6896 | GFP_KERNEL); | |
7c13f344 BF |
6897 | if (!deny->ld_owner.data) |
6898 | /* We just don't care that much */ | |
6899 | goto nevermind; | |
fe0750e5 | 6900 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
d5b9026a | 6901 | } else { |
7c13f344 BF |
6902 | nevermind: |
6903 | deny->ld_owner.len = 0; | |
6904 | deny->ld_owner.data = NULL; | |
d5b9026a N |
6905 | deny->ld_clientid.cl_boot = 0; |
6906 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
6907 | } |
6908 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
6909 | deny->ld_length = NFS4_MAX_UINT64; |
6910 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
6911 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
6912 | deny->ld_type = NFS4_READ_LT; | |
6913 | if (fl->fl_type != F_RDLCK) | |
6914 | deny->ld_type = NFS4_WRITE_LT; | |
6915 | } | |
6916 | ||
fe0750e5 | 6917 | static struct nfs4_lockowner * |
c8623999 | 6918 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 6919 | { |
d4f0489f | 6920 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 6921 | struct nfs4_stateowner *so; |
1da177e4 | 6922 | |
0a880a28 TM |
6923 | lockdep_assert_held(&clp->cl_lock); |
6924 | ||
d4f0489f TM |
6925 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
6926 | so_strhash) { | |
b3c32bcd TM |
6927 | if (so->so_is_open_owner) |
6928 | continue; | |
b5971afa KM |
6929 | if (same_owner_str(so, owner)) |
6930 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
6931 | } |
6932 | return NULL; | |
6933 | } | |
6934 | ||
c58c6610 | 6935 | static struct nfs4_lockowner * |
c8623999 | 6936 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
6937 | { |
6938 | struct nfs4_lockowner *lo; | |
6939 | ||
d4f0489f | 6940 | spin_lock(&clp->cl_lock); |
c8623999 | 6941 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 6942 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
6943 | return lo; |
6944 | } | |
6945 | ||
8f4b54c5 JL |
6946 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
6947 | { | |
c58c6610 | 6948 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
6949 | } |
6950 | ||
6b180f0b JL |
6951 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
6952 | { | |
6953 | struct nfs4_lockowner *lo = lockowner(sop); | |
6954 | ||
6955 | kmem_cache_free(lockowner_slab, lo); | |
6956 | } | |
6957 | ||
6958 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
6959 | .so_unhash = nfs4_unhash_lockowner, |
6960 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
6961 | }; |
6962 | ||
1da177e4 LT |
6963 | /* |
6964 | * Alloc a lock owner structure. | |
6965 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 6966 | * occurred. |
1da177e4 | 6967 | * |
16bfdaaf | 6968 | * strhashval = ownerstr_hashval |
1da177e4 | 6969 | */ |
fe0750e5 | 6970 | static struct nfs4_lockowner * |
c58c6610 TM |
6971 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
6972 | struct nfs4_ol_stateid *open_stp, | |
6973 | struct nfsd4_lock *lock) | |
6974 | { | |
c58c6610 | 6975 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 6976 | |
fe0750e5 BF |
6977 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
6978 | if (!lo) | |
1da177e4 | 6979 | return NULL; |
76d348fa | 6980 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
6981 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
6982 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 6983 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 6984 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 6985 | spin_lock(&clp->cl_lock); |
c8623999 | 6986 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
6987 | if (ret == NULL) { |
6988 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 6989 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
6990 | ret = lo; |
6991 | } else | |
d50ffded KM |
6992 | nfs4_free_stateowner(&lo->lo_owner); |
6993 | ||
d4f0489f | 6994 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 6995 | return ret; |
1da177e4 LT |
6996 | } |
6997 | ||
fd1fd685 | 6998 | static struct nfs4_ol_stateid * |
a451b123 TM |
6999 | find_lock_stateid(const struct nfs4_lockowner *lo, |
7000 | const struct nfs4_ol_stateid *ost) | |
fd1fd685 TM |
7001 | { |
7002 | struct nfs4_ol_stateid *lst; | |
fd1fd685 | 7003 | |
a451b123 | 7004 | lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); |
fd1fd685 | 7005 | |
a451b123 TM |
7006 | /* If ost is not hashed, ost->st_locks will not be valid */ |
7007 | if (!nfs4_ol_stateid_unhashed(ost)) | |
7008 | list_for_each_entry(lst, &ost->st_locks, st_locks) { | |
7009 | if (lst->st_stateowner == &lo->lo_owner) { | |
7010 | refcount_inc(&lst->st_stid.sc_count); | |
7011 | return lst; | |
7012 | } | |
fd1fd685 | 7013 | } |
fd1fd685 TM |
7014 | return NULL; |
7015 | } | |
7016 | ||
beeca19c | 7017 | static struct nfs4_ol_stateid * |
356a95ec JL |
7018 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
7019 | struct nfs4_file *fp, struct inode *inode, | |
7020 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 7021 | { |
d3b313a4 | 7022 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 7023 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 7024 | |
beeca19c | 7025 | mutex_init(&stp->st_mutex); |
4f34bd05 | 7026 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
7027 | retry: |
7028 | spin_lock(&clp->cl_lock); | |
a451b123 TM |
7029 | if (nfs4_ol_stateid_unhashed(open_stp)) |
7030 | goto out_close; | |
7031 | retstp = find_lock_stateid(lo, open_stp); | |
beeca19c | 7032 | if (retstp) |
a451b123 | 7033 | goto out_found; |
a15dfcd5 | 7034 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 7035 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 7036 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 7037 | get_nfs4_file(fp); |
11b9164a | 7038 | stp->st_stid.sc_file = fp; |
0997b173 | 7039 | stp->st_access_bmap = 0; |
1da177e4 | 7040 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 7041 | stp->st_openstp = open_stp; |
a451b123 | 7042 | spin_lock(&fp->fi_lock); |
3c87b9b7 | 7043 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 7044 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
7045 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7046 | spin_unlock(&fp->fi_lock); | |
beeca19c | 7047 | spin_unlock(&clp->cl_lock); |
beeca19c | 7048 | return stp; |
a451b123 TM |
7049 | out_found: |
7050 | spin_unlock(&clp->cl_lock); | |
7051 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
7052 | nfs4_put_stid(&retstp->st_stid); | |
7053 | goto retry; | |
7054 | } | |
7055 | /* To keep mutex tracking happy */ | |
7056 | mutex_unlock(&stp->st_mutex); | |
7057 | return retstp; | |
7058 | out_close: | |
7059 | spin_unlock(&clp->cl_lock); | |
7060 | mutex_unlock(&stp->st_mutex); | |
7061 | return NULL; | |
1da177e4 LT |
7062 | } |
7063 | ||
356a95ec JL |
7064 | static struct nfs4_ol_stateid * |
7065 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
7066 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
7067 | bool *new) | |
7068 | { | |
7069 | struct nfs4_stid *ns = NULL; | |
7070 | struct nfs4_ol_stateid *lst; | |
7071 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
7072 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
7073 | ||
beeca19c | 7074 | *new = false; |
356a95ec | 7075 | spin_lock(&clp->cl_lock); |
a451b123 | 7076 | lst = find_lock_stateid(lo, ost); |
356a95ec | 7077 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
7078 | if (lst != NULL) { |
7079 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
7080 | goto out; | |
7081 | nfs4_put_stid(&lst->st_stid); | |
7082 | } | |
7083 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
7084 | if (ns == NULL) | |
7085 | return NULL; | |
7086 | ||
7087 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
7088 | if (lst == openlockstateid(ns)) | |
7089 | *new = true; | |
7090 | else | |
356a95ec | 7091 | nfs4_put_stid(ns); |
beeca19c | 7092 | out: |
356a95ec JL |
7093 | return lst; |
7094 | } | |
c53530da | 7095 | |
fd39ca9a | 7096 | static int |
1da177e4 LT |
7097 | check_lock_length(u64 offset, u64 length) |
7098 | { | |
e7969315 KM |
7099 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
7100 | (length > ~offset))); | |
1da177e4 LT |
7101 | } |
7102 | ||
dcef0413 | 7103 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 7104 | { |
11b9164a | 7105 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 7106 | |
7214e860 JL |
7107 | lockdep_assert_held(&fp->fi_lock); |
7108 | ||
82c5ff1b | 7109 | if (test_access(access, lock_stp)) |
0997b173 | 7110 | return; |
12659651 | 7111 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 7112 | set_access(access, lock_stp); |
0997b173 BF |
7113 | } |
7114 | ||
356a95ec JL |
7115 | static __be32 |
7116 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
7117 | struct nfs4_ol_stateid *ost, | |
7118 | struct nfsd4_lock *lock, | |
dd257933 | 7119 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 7120 | { |
5db1c03f | 7121 | __be32 status; |
11b9164a | 7122 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
7123 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
7124 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 7125 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 7126 | struct nfs4_lockowner *lo; |
dd257933 | 7127 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
7128 | unsigned int strhashval; |
7129 | ||
c8623999 | 7130 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 7131 | if (!lo) { |
76f6c9e1 | 7132 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
7133 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
7134 | if (lo == NULL) | |
7135 | return nfserr_jukebox; | |
7136 | } else { | |
7137 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 7138 | status = nfserr_bad_seqid; |
c53530da JL |
7139 | if (!cstate->minorversion && |
7140 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 7141 | goto out; |
64a284d0 | 7142 | } |
c53530da | 7143 | |
dd257933 JL |
7144 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
7145 | if (lst == NULL) { | |
5db1c03f JL |
7146 | status = nfserr_jukebox; |
7147 | goto out; | |
64a284d0 | 7148 | } |
dd257933 | 7149 | |
5db1c03f | 7150 | status = nfs_ok; |
dd257933 | 7151 | *plst = lst; |
5db1c03f JL |
7152 | out: |
7153 | nfs4_put_stateowner(&lo->lo_owner); | |
7154 | return status; | |
64a284d0 BF |
7155 | } |
7156 | ||
1da177e4 LT |
7157 | /* |
7158 | * LOCK operation | |
7159 | */ | |
b37ad28b | 7160 | __be32 |
ca364317 | 7161 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7162 | union nfsd4_op_u *u) |
1da177e4 | 7163 | { |
eb69853d | 7164 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
7165 | struct nfs4_openowner *open_sop = NULL; |
7166 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 7167 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 7168 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 7169 | struct nfs4_file *fp; |
eb82dd39 | 7170 | struct nfsd_file *nf = NULL; |
76d348fa | 7171 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
7172 | struct file_lock *file_lock = NULL; |
7173 | struct file_lock *conflock = NULL; | |
b37ad28b | 7174 | __be32 status = 0; |
b34f27aa | 7175 | int lkflg; |
b8dd7b9a | 7176 | int err; |
5db1c03f | 7177 | bool new = false; |
76d348fa JL |
7178 | unsigned char fl_type; |
7179 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
7180 | struct net *net = SVC_NET(rqstp); |
7181 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
7182 | |
7183 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
7184 | (long long) lock->lk_offset, | |
7185 | (long long) lock->lk_length); | |
7186 | ||
1da177e4 LT |
7187 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
7188 | return nfserr_inval; | |
7189 | ||
ca364317 | 7190 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 7191 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
7192 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
7193 | return status; | |
7194 | } | |
7195 | ||
1da177e4 | 7196 | if (lock->lk_is_new) { |
684e5638 BF |
7197 | if (nfsd4_has_session(cstate)) |
7198 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 7199 | memcpy(&lock->lk_new_clientid, |
ec59659b | 7200 | &cstate->clp->cl_clientid, |
684e5638 BF |
7201 | sizeof(clientid_t)); |
7202 | ||
1da177e4 | 7203 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 7204 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
7205 | lock->lk_new_open_seqid, |
7206 | &lock->lk_new_open_stateid, | |
3320fef1 | 7207 | &open_stp, nn); |
37515177 | 7208 | if (status) |
1da177e4 | 7209 | goto out; |
feb9dad5 | 7210 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 7211 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 7212 | status = nfserr_bad_stateid; |
684e5638 | 7213 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 7214 | &lock->lk_new_clientid)) |
b34f27aa | 7215 | goto out; |
64a284d0 | 7216 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 7217 | &lock_stp, &new); |
3d0fabd5 | 7218 | } else { |
dd453dfd | 7219 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
7220 | lock->lk_old_lock_seqid, |
7221 | &lock->lk_old_lock_stateid, | |
3320fef1 | 7222 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 7223 | } |
e1aaa891 BF |
7224 | if (status) |
7225 | goto out; | |
64a284d0 | 7226 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 7227 | |
b34f27aa BF |
7228 | lkflg = setlkflg(lock->lk_type); |
7229 | status = nfs4_check_openmode(lock_stp, lkflg); | |
7230 | if (status) | |
7231 | goto out; | |
7232 | ||
0dd395dc | 7233 | status = nfserr_grace; |
3320fef1 | 7234 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
7235 | goto out; |
7236 | status = nfserr_no_grace; | |
3320fef1 | 7237 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
7238 | goto out; |
7239 | ||
bb0a55bb BF |
7240 | if (lock->lk_reclaim) |
7241 | fl_flags |= FL_RECLAIM; | |
7242 | ||
11b9164a | 7243 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 7244 | switch (lock->lk_type) { |
1da177e4 | 7245 | case NFS4_READW_LT: |
40595cdc | 7246 | if (nfsd4_has_session(cstate)) |
76d348fa | 7247 | fl_flags |= FL_SLEEP; |
df561f66 | 7248 | fallthrough; |
76d348fa | 7249 | case NFS4_READ_LT: |
7214e860 | 7250 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7251 | nf = find_readable_file_locked(fp); |
7252 | if (nf) | |
0997b173 | 7253 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
7214e860 | 7254 | spin_unlock(&fp->fi_lock); |
76d348fa | 7255 | fl_type = F_RDLCK; |
529d7b2a | 7256 | break; |
1da177e4 | 7257 | case NFS4_WRITEW_LT: |
40595cdc | 7258 | if (nfsd4_has_session(cstate)) |
76d348fa | 7259 | fl_flags |= FL_SLEEP; |
df561f66 | 7260 | fallthrough; |
76d348fa | 7261 | case NFS4_WRITE_LT: |
7214e860 | 7262 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
7263 | nf = find_writeable_file_locked(fp); |
7264 | if (nf) | |
0997b173 | 7265 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
7214e860 | 7266 | spin_unlock(&fp->fi_lock); |
76d348fa | 7267 | fl_type = F_WRLCK; |
529d7b2a | 7268 | break; |
1da177e4 LT |
7269 | default: |
7270 | status = nfserr_inval; | |
7271 | goto out; | |
7272 | } | |
76d348fa | 7273 | |
eb82dd39 | 7274 | if (!nf) { |
f9d7562f BF |
7275 | status = nfserr_openmode; |
7276 | goto out; | |
7277 | } | |
aef9583b | 7278 | |
40595cdc BF |
7279 | /* |
7280 | * Most filesystems with their own ->lock operations will block | |
7281 | * the nfsd thread waiting to acquire the lock. That leads to | |
7282 | * deadlocks (we don't want every nfsd thread tied up waiting | |
7283 | * for file locks), so don't attempt blocking lock notifications | |
7284 | * on those filesystems: | |
7285 | */ | |
7286 | if (nf->nf_file->f_op->lock) | |
7287 | fl_flags &= ~FL_SLEEP; | |
7288 | ||
76d348fa JL |
7289 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
7290 | if (!nbl) { | |
7291 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
7292 | status = nfserr_jukebox; | |
7293 | goto out; | |
7294 | } | |
7295 | ||
7296 | file_lock = &nbl->nbl_lock; | |
7297 | file_lock->fl_type = fl_type; | |
aef9583b | 7298 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 | 7299 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7300 | file_lock->fl_file = nf->nf_file; |
76d348fa | 7301 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
7302 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
7303 | file_lock->fl_start = lock->lk_offset; | |
7304 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
7305 | nfs4_transform_lock_offset(file_lock); | |
7306 | ||
7307 | conflock = locks_alloc_lock(); | |
7308 | if (!conflock) { | |
7309 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7310 | status = nfserr_jukebox; | |
7311 | goto out; | |
7312 | } | |
1da177e4 | 7313 | |
76d348fa | 7314 | if (fl_flags & FL_SLEEP) { |
20b7d86f | 7315 | nbl->nbl_time = ktime_get_boottime_seconds(); |
0cc11a61 | 7316 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 7317 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 7318 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
47446d74 | 7319 | kref_get(&nbl->nbl_kref); |
0cc11a61 | 7320 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7321 | } |
7322 | ||
eb82dd39 | 7323 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); |
76d348fa | 7324 | switch (err) { |
1da177e4 | 7325 | case 0: /* success! */ |
9767feb2 | 7326 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 7327 | status = 0; |
03f318ca BF |
7328 | if (lock->lk_reclaim) |
7329 | nn->somebody_reclaimed = true; | |
eb76b3fd | 7330 | break; |
76d348fa | 7331 | case FILE_LOCK_DEFERRED: |
47446d74 | 7332 | kref_put(&nbl->nbl_kref, free_nbl); |
76d348fa | 7333 | nbl = NULL; |
df561f66 | 7334 | fallthrough; |
76d348fa | 7335 | case -EAGAIN: /* conflock holds conflicting lock */ |
eb76b3fd AA |
7336 | status = nfserr_denied; |
7337 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 7338 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 7339 | break; |
76d348fa | 7340 | case -EDEADLK: |
1da177e4 | 7341 | status = nfserr_deadlock; |
eb76b3fd | 7342 | break; |
3e772463 | 7343 | default: |
fd85b817 | 7344 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 7345 | status = nfserrno(err); |
eb76b3fd | 7346 | break; |
1da177e4 | 7347 | } |
1da177e4 | 7348 | out: |
76d348fa JL |
7349 | if (nbl) { |
7350 | /* dequeue it if we queued it before */ | |
7351 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 7352 | spin_lock(&nn->blocked_locks_lock); |
47446d74 VA |
7353 | if (!list_empty(&nbl->nbl_list) && |
7354 | !list_empty(&nbl->nbl_lru)) { | |
7355 | list_del_init(&nbl->nbl_list); | |
7356 | list_del_init(&nbl->nbl_lru); | |
7357 | kref_put(&nbl->nbl_kref, free_nbl); | |
7358 | } | |
7359 | /* nbl can use one of lists to be linked to reaplist */ | |
0cc11a61 | 7360 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
7361 | } |
7362 | free_blocked_lock(nbl); | |
7363 | } | |
eb82dd39 JL |
7364 | if (nf) |
7365 | nfsd_file_put(nf); | |
5db1c03f JL |
7366 | if (lock_stp) { |
7367 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
7368 | if (cstate->replay_owner && | |
7369 | cstate->replay_owner != &lock_sop->lo_owner && | |
7370 | seqid_mutating_err(ntohl(status))) | |
7371 | lock_sop->lo_owner.so_seqid++; | |
7372 | ||
7373 | /* | |
7374 | * If this is a new, never-before-used stateid, and we are | |
7375 | * returning an error, then just go ahead and release it. | |
7376 | */ | |
25020720 | 7377 | if (status && new) |
5db1c03f | 7378 | release_lock_stateid(lock_stp); |
beeca19c TM |
7379 | |
7380 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 7381 | |
3d0fabd5 | 7382 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 7383 | } |
0667b1e9 TM |
7384 | if (open_stp) |
7385 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 7386 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7387 | if (conflock) |
7388 | locks_free_lock(conflock); | |
1da177e4 LT |
7389 | return status; |
7390 | } | |
7391 | ||
55ef1274 BF |
7392 | /* |
7393 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
7394 | * so we do a temporary open here just to get an open file to pass to | |
0bcc7ca4 | 7395 | * vfs_test_lock. |
55ef1274 | 7396 | */ |
04da6e9d | 7397 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 | 7398 | { |
6b556ca2 | 7399 | struct nfsd_file *nf; |
bb4d53d6 | 7400 | struct inode *inode; |
217fd6f6 BF |
7401 | __be32 err; |
7402 | ||
7403 | err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); | |
7404 | if (err) | |
7405 | return err; | |
bb4d53d6 N |
7406 | inode = fhp->fh_dentry->d_inode; |
7407 | inode_lock(inode); /* to block new leases till after test_lock: */ | |
7408 | err = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ)); | |
217fd6f6 BF |
7409 | if (err) |
7410 | goto out; | |
0bcc7ca4 | 7411 | lock->fl_file = nf->nf_file; |
217fd6f6 | 7412 | err = nfserrno(vfs_test_lock(nf->nf_file, lock)); |
0bcc7ca4 | 7413 | lock->fl_file = NULL; |
217fd6f6 | 7414 | out: |
bb4d53d6 | 7415 | inode_unlock(inode); |
217fd6f6 | 7416 | nfsd_file_put(nf); |
55ef1274 BF |
7417 | return err; |
7418 | } | |
7419 | ||
1da177e4 LT |
7420 | /* |
7421 | * LOCKT operation | |
7422 | */ | |
b37ad28b | 7423 | __be32 |
ca364317 | 7424 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7425 | union nfsd4_op_u *u) |
1da177e4 | 7426 | { |
eb69853d | 7427 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 7428 | struct file_lock *file_lock = NULL; |
5db1c03f | 7429 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 7430 | __be32 status; |
7f2210fa | 7431 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7432 | |
5ccb0066 | 7433 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
7434 | return nfserr_grace; |
7435 | ||
7436 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
7437 | return nfserr_inval; | |
7438 | ||
9b2ef62b | 7439 | if (!nfsd4_has_session(cstate)) { |
f71475ba | 7440 | status = set_client(&lockt->lt_clientid, cstate, nn); |
9b2ef62b BF |
7441 | if (status) |
7442 | goto out; | |
7443 | } | |
1da177e4 | 7444 | |
75c096f7 | 7445 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 7446 | goto out; |
1da177e4 | 7447 | |
21179d81 JL |
7448 | file_lock = locks_alloc_lock(); |
7449 | if (!file_lock) { | |
7450 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7451 | status = nfserr_jukebox; | |
7452 | goto out; | |
7453 | } | |
6cd90662 | 7454 | |
1da177e4 LT |
7455 | switch (lockt->lt_type) { |
7456 | case NFS4_READ_LT: | |
7457 | case NFS4_READW_LT: | |
21179d81 | 7458 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 7459 | break; |
1da177e4 LT |
7460 | case NFS4_WRITE_LT: |
7461 | case NFS4_WRITEW_LT: | |
21179d81 | 7462 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 7463 | break; |
1da177e4 | 7464 | default: |
2fdada03 | 7465 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 7466 | status = nfserr_inval; |
f50c9d79 | 7467 | goto out; |
1da177e4 LT |
7468 | } |
7469 | ||
c8623999 | 7470 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 7471 | if (lo) |
21179d81 JL |
7472 | file_lock->fl_owner = (fl_owner_t)lo; |
7473 | file_lock->fl_pid = current->tgid; | |
7474 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 7475 | |
21179d81 JL |
7476 | file_lock->fl_start = lockt->lt_offset; |
7477 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 7478 | |
21179d81 | 7479 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 7480 | |
21179d81 | 7481 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 7482 | if (status) |
fd85b817 | 7483 | goto out; |
04da6e9d | 7484 | |
21179d81 | 7485 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 7486 | status = nfserr_denied; |
21179d81 | 7487 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
7488 | } |
7489 | out: | |
5db1c03f JL |
7490 | if (lo) |
7491 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
7492 | if (file_lock) |
7493 | locks_free_lock(file_lock); | |
1da177e4 LT |
7494 | return status; |
7495 | } | |
7496 | ||
b37ad28b | 7497 | __be32 |
ca364317 | 7498 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 7499 | union nfsd4_op_u *u) |
1da177e4 | 7500 | { |
eb69853d | 7501 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 7502 | struct nfs4_ol_stateid *stp; |
eb82dd39 | 7503 | struct nfsd_file *nf = NULL; |
21179d81 | 7504 | struct file_lock *file_lock = NULL; |
b37ad28b | 7505 | __be32 status; |
b8dd7b9a | 7506 | int err; |
3320fef1 SK |
7507 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
7508 | ||
1da177e4 LT |
7509 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
7510 | (long long) locku->lu_offset, | |
7511 | (long long) locku->lu_length); | |
7512 | ||
7513 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
7514 | return nfserr_inval; | |
7515 | ||
9072d5c6 | 7516 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
7517 | &locku->lu_stateid, NFS4_LOCK_STID, |
7518 | &stp, nn); | |
9072d5c6 | 7519 | if (status) |
1da177e4 | 7520 | goto out; |
eb82dd39 JL |
7521 | nf = find_any_file(stp->st_stid.sc_file); |
7522 | if (!nf) { | |
f9d7562f | 7523 | status = nfserr_lock_range; |
858cc573 | 7524 | goto put_stateid; |
f9d7562f | 7525 | } |
21179d81 JL |
7526 | file_lock = locks_alloc_lock(); |
7527 | if (!file_lock) { | |
7528 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
7529 | status = nfserr_jukebox; | |
eb82dd39 | 7530 | goto put_file; |
21179d81 | 7531 | } |
6cd90662 | 7532 | |
21179d81 | 7533 | file_lock->fl_type = F_UNLCK; |
aef9583b | 7534 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 | 7535 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 7536 | file_lock->fl_file = nf->nf_file; |
21179d81 JL |
7537 | file_lock->fl_flags = FL_POSIX; |
7538 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
7539 | file_lock->fl_start = locku->lu_offset; | |
7540 | ||
7541 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
7542 | locku->lu_length); | |
7543 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 7544 | |
eb82dd39 | 7545 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); |
b8dd7b9a | 7546 | if (err) { |
fd85b817 | 7547 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
7548 | goto out_nfserr; |
7549 | } | |
9767feb2 | 7550 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
eb82dd39 JL |
7551 | put_file: |
7552 | nfsd_file_put(nf); | |
858cc573 | 7553 | put_stateid: |
feb9dad5 | 7554 | mutex_unlock(&stp->st_mutex); |
858cc573 | 7555 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 7556 | out: |
9411b1d4 | 7557 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
7558 | if (file_lock) |
7559 | locks_free_lock(file_lock); | |
1da177e4 LT |
7560 | return status; |
7561 | ||
7562 | out_nfserr: | |
b8dd7b9a | 7563 | status = nfserrno(err); |
eb82dd39 | 7564 | goto put_file; |
1da177e4 LT |
7565 | } |
7566 | ||
7567 | /* | |
7568 | * returns | |
f9c00c3a JL |
7569 | * true: locks held by lockowner |
7570 | * false: no locks held by lockowner | |
1da177e4 | 7571 | */ |
f9c00c3a JL |
7572 | static bool |
7573 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 7574 | { |
bd61e0a9 | 7575 | struct file_lock *fl; |
f9c00c3a | 7576 | int status = false; |
eb82dd39 | 7577 | struct nfsd_file *nf = find_any_file(fp); |
f9c00c3a | 7578 | struct inode *inode; |
bd61e0a9 | 7579 | struct file_lock_context *flctx; |
f9c00c3a | 7580 | |
eb82dd39 | 7581 | if (!nf) { |
f9c00c3a JL |
7582 | /* Any valid lock stateid should have some sort of access */ |
7583 | WARN_ON_ONCE(1); | |
7584 | return status; | |
7585 | } | |
7586 | ||
eb82dd39 | 7587 | inode = locks_inode(nf->nf_file); |
bd61e0a9 JL |
7588 | flctx = inode->i_flctx; |
7589 | ||
7590 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 7591 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
7592 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
7593 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
7594 | status = true; | |
7595 | break; | |
7596 | } | |
796dadfd | 7597 | } |
6109c850 | 7598 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 7599 | } |
eb82dd39 | 7600 | nfsd_file_put(nf); |
1da177e4 LT |
7601 | return status; |
7602 | } | |
7603 | ||
043862b0 CL |
7604 | /** |
7605 | * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations | |
7606 | * @rqstp: RPC transaction | |
7607 | * @cstate: NFSv4 COMPOUND state | |
7608 | * @u: RELEASE_LOCKOWNER arguments | |
7609 | * | |
7610 | * The lockowner's so_count is bumped when a lock record is added | |
7611 | * or when copying a conflicting lock. The latter case is brief, | |
7612 | * but can lead to fleeting false positives when looking for | |
7613 | * locks-in-use. | |
7614 | * | |
7615 | * Return values: | |
7616 | * %nfs_ok: lockowner released or not found | |
7617 | * %nfserr_locks_held: lockowner still in use | |
7618 | * %nfserr_stale_clientid: clientid no longer active | |
7619 | * %nfserr_expired: clientid not recognized | |
7620 | */ | |
b37ad28b | 7621 | __be32 |
b591480b BF |
7622 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
7623 | struct nfsd4_compound_state *cstate, | |
eb69853d | 7624 | union nfsd4_op_u *u) |
1da177e4 | 7625 | { |
eb69853d | 7626 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
bd8fdb6e | 7627 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 7628 | clientid_t *clid = &rlockowner->rl_clientid; |
dcef0413 | 7629 | struct nfs4_ol_stateid *stp; |
bd8fdb6e | 7630 | struct nfs4_lockowner *lo; |
c58c6610 | 7631 | struct nfs4_client *clp; |
bd8fdb6e CL |
7632 | LIST_HEAD(reaplist); |
7633 | __be32 status; | |
1da177e4 LT |
7634 | |
7635 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
7636 | clid->cl_boot, clid->cl_id); | |
7637 | ||
f71475ba | 7638 | status = set_client(clid, cstate, nn); |
9b2ef62b | 7639 | if (status) |
51f5e783 | 7640 | return status; |
d4f0489f | 7641 | clp = cstate->clp; |
fd44907c | 7642 | |
bd8fdb6e CL |
7643 | spin_lock(&clp->cl_lock); |
7644 | lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner); | |
88584818 CL |
7645 | if (!lo) { |
7646 | spin_unlock(&clp->cl_lock); | |
043862b0 | 7647 | return nfs_ok; |
88584818 | 7648 | } |
bd8fdb6e CL |
7649 | if (atomic_read(&lo->lo_owner.so_count) != 2) { |
7650 | spin_unlock(&clp->cl_lock); | |
7651 | nfs4_put_stateowner(&lo->lo_owner); | |
7652 | return nfserr_locks_held; | |
7653 | } | |
88584818 CL |
7654 | unhash_lockowner_locked(lo); |
7655 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
7656 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
7657 | struct nfs4_ol_stateid, | |
7658 | st_perstateowner); | |
7659 | WARN_ON(!unhash_lock_stateid(stp)); | |
7660 | put_ol_stateid_locked(stp, &reaplist); | |
7661 | } | |
c58c6610 | 7662 | spin_unlock(&clp->cl_lock); |
043862b0 | 7663 | |
88584818 | 7664 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 7665 | remove_blocked_locks(lo); |
88584818 | 7666 | nfs4_put_stateowner(&lo->lo_owner); |
043862b0 | 7667 | return nfs_ok; |
1da177e4 LT |
7668 | } |
7669 | ||
7670 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 7671 | alloc_reclaim(void) |
1da177e4 | 7672 | { |
a55370a3 | 7673 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
7674 | } |
7675 | ||
0ce0c2b5 | 7676 | bool |
6b189105 | 7677 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 7678 | { |
0ce0c2b5 | 7679 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 7680 | |
52e19c09 | 7681 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 7682 | return (crp && crp->cr_clp); |
c7b9a459 N |
7683 | } |
7684 | ||
1da177e4 LT |
7685 | /* |
7686 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
7687 | * |
7688 | * The caller is responsible for freeing name.data if NULL is returned (it | |
7689 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 7690 | */ |
772a9bbb | 7691 | struct nfs4_client_reclaim * |
6ee95d1c SM |
7692 | nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, |
7693 | struct nfsd_net *nn) | |
1da177e4 LT |
7694 | { |
7695 | unsigned int strhashval; | |
772a9bbb | 7696 | struct nfs4_client_reclaim *crp; |
1da177e4 | 7697 | |
a55370a3 | 7698 | crp = alloc_reclaim(); |
772a9bbb JL |
7699 | if (crp) { |
7700 | strhashval = clientstr_hashval(name); | |
7701 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 7702 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
7703 | crp->cr_name.data = name.data; |
7704 | crp->cr_name.len = name.len; | |
6ee95d1c SM |
7705 | crp->cr_princhash.data = princhash.data; |
7706 | crp->cr_princhash.len = princhash.len; | |
0ce0c2b5 | 7707 | crp->cr_clp = NULL; |
52e19c09 | 7708 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
7709 | } |
7710 | return crp; | |
1da177e4 LT |
7711 | } |
7712 | ||
ce30e539 | 7713 | void |
52e19c09 | 7714 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
7715 | { |
7716 | list_del(&crp->cr_strhash); | |
6b189105 | 7717 | kfree(crp->cr_name.data); |
6ee95d1c | 7718 | kfree(crp->cr_princhash.data); |
ce30e539 | 7719 | kfree(crp); |
52e19c09 | 7720 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
7721 | } |
7722 | ||
2a4317c5 | 7723 | void |
52e19c09 | 7724 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
7725 | { |
7726 | struct nfs4_client_reclaim *crp = NULL; | |
7727 | int i; | |
7728 | ||
1da177e4 | 7729 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
7730 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
7731 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 7732 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 7733 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
7734 | } |
7735 | } | |
063b0fb9 | 7736 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
7737 | } |
7738 | ||
7739 | /* | |
7740 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 7741 | struct nfs4_client_reclaim * |
6b189105 | 7742 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
7743 | { |
7744 | unsigned int strhashval; | |
1da177e4 LT |
7745 | struct nfs4_client_reclaim *crp = NULL; |
7746 | ||
6b189105 | 7747 | strhashval = clientstr_hashval(name); |
52e19c09 | 7748 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 7749 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
7750 | return crp; |
7751 | } | |
7752 | } | |
7753 | return NULL; | |
7754 | } | |
7755 | ||
b37ad28b | 7756 | __be32 |
1722b046 | 7757 | nfs4_check_open_reclaim(struct nfs4_client *clp) |
1da177e4 | 7758 | { |
1722b046 | 7759 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags)) |
3b3e7b72 JL |
7760 | return nfserr_no_grace; |
7761 | ||
1722b046 | 7762 | if (nfsd4_client_record_check(clp)) |
0fe492db TM |
7763 | return nfserr_reclaim_bad; |
7764 | ||
7765 | return nfs_ok; | |
1da177e4 LT |
7766 | } |
7767 | ||
c2f1a551 MS |
7768 | /* |
7769 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7770 | * client may quite reasonably hang on to a delegation as long as it has | |
7771 | * the inode cached. This becomes an obvious problem the first time a | |
7772 | * client's inode cache approaches the size of the server's total memory. | |
7773 | * | |
7774 | * For now we avoid this problem by imposing a hard limit on the number | |
7775 | * of delegations, which varies according to the server's memory size. | |
7776 | */ | |
7777 | static void | |
7778 | set_max_delegations(void) | |
7779 | { | |
7780 | /* | |
7781 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7782 | * estimates suggest that in the worst case (where every delegation | |
7783 | * is for a different inode), a delegation could take about 1.5K, | |
7784 | * giving a worst case usage of about 6% of memory. | |
7785 | */ | |
7786 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7787 | } | |
7788 | ||
d85ed443 | 7789 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7790 | { |
7791 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7792 | int i; | |
7793 | ||
6da2ec56 KC |
7794 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7795 | sizeof(struct list_head), | |
7796 | GFP_KERNEL); | |
8daae4dc | 7797 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7798 | goto err; |
6da2ec56 KC |
7799 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7800 | sizeof(struct list_head), | |
7801 | GFP_KERNEL); | |
0a7ec377 SK |
7802 | if (!nn->unconf_id_hashtbl) |
7803 | goto err_unconf_id; | |
6da2ec56 KC |
7804 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7805 | sizeof(struct list_head), | |
7806 | GFP_KERNEL); | |
1872de0e SK |
7807 | if (!nn->sessionid_hashtbl) |
7808 | goto err_sessionid; | |
8daae4dc | 7809 | |
382a62e7 | 7810 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7811 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7812 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7813 | } |
1872de0e SK |
7814 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7815 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7816 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7817 | nn->unconf_name_tree = RB_ROOT; |
9cc76801 | 7818 | nn->boot_time = ktime_get_real_seconds(); |
81833de1 VA |
7819 | nn->grace_ended = false; |
7820 | nn->nfsd4_manager.block_opens = true; | |
7821 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7822 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7823 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7824 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7825 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
7826 | spin_lock_init(&nn->s2s_cp_lock); |
7827 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 7828 | |
0cc11a61 JL |
7829 | spin_lock_init(&nn->blocked_locks_lock); |
7830 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7831 | ||
09121281 | 7832 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7833 | get_net(net); |
09121281 | 7834 | |
8daae4dc | 7835 | return 0; |
382a62e7 | 7836 | |
1872de0e | 7837 | err_sessionid: |
9b531137 | 7838 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7839 | err_unconf_id: |
7840 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7841 | err: |
7842 | return -ENOMEM; | |
8daae4dc SK |
7843 | } |
7844 | ||
7845 | static void | |
4dce0ac9 | 7846 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7847 | { |
7848 | int i; | |
7849 | struct nfs4_client *clp = NULL; | |
7850 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7851 | ||
7852 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7853 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7854 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7855 | destroy_client(clp); | |
7856 | } | |
7857 | } | |
a99454aa | 7858 | |
68ef3bc3 JL |
7859 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7860 | ||
2b905635 KM |
7861 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7862 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7863 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7864 | destroy_client(clp); | |
7865 | } | |
a99454aa SK |
7866 | } |
7867 | ||
1872de0e | 7868 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7869 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7870 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7871 | put_net(net); |
8daae4dc SK |
7872 | } |
7873 | ||
f252bc68 | 7874 | int |
d85ed443 | 7875 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7876 | { |
5e1533c7 | 7877 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7878 | int ret; |
7879 | ||
681370f4 | 7880 | ret = nfs4_state_create_net(net); |
c6c7f2a8 | 7881 | if (ret) |
681370f4 | 7882 | return ret; |
d4318acd JL |
7883 | locks_start_grace(net, &nn->nfsd4_manager); |
7884 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
7885 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
7886 | goto skip_grace; | |
20b7d86f | 7887 | printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", |
7e981a8a | 7888 | nn->nfsd4_grace, net->ns.inum); |
dd5e3fbc | 7889 | trace_nfsd_grace_start(nn); |
5284b44e | 7890 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 7891 | return 0; |
362063a5 SM |
7892 | |
7893 | skip_grace: | |
7894 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
7895 | net->ns.inum); | |
7896 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
7897 | nfsd4_end_grace(nn); | |
7898 | return 0; | |
d85ed443 SK |
7899 | } |
7900 | ||
7901 | /* initialization to perform when the nfsd service is started: */ | |
7902 | ||
7903 | int | |
7904 | nfs4_state_start(void) | |
7905 | { | |
7906 | int ret; | |
7907 | ||
b5a1a81e BF |
7908 | ret = nfsd4_create_callback_queue(); |
7909 | if (ret) | |
d76cc46b | 7910 | return ret; |
09121281 | 7911 | |
c2f1a551 | 7912 | set_max_delegations(); |
b5a1a81e | 7913 | return 0; |
1da177e4 LT |
7914 | } |
7915 | ||
f252bc68 | 7916 | void |
4dce0ac9 | 7917 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7918 | { |
1da177e4 | 7919 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7920 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7921 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7922 | |
4dce0ac9 SK |
7923 | cancel_delayed_work_sync(&nn->laundromat_work); |
7924 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7925 | |
1da177e4 | 7926 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7927 | spin_lock(&state_lock); |
e8c69d17 | 7928 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7929 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7930 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7931 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7932 | } |
cdc97505 | 7933 | spin_unlock(&state_lock); |
1da177e4 LT |
7934 | list_for_each_safe(pos, next, &reaplist) { |
7935 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7936 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 7937 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
7938 | } |
7939 | ||
3320fef1 | 7940 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7941 | nfs4_state_destroy_net(net); |
f4e44b39 DN |
7942 | #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
7943 | nfsd4_ssc_shutdown_umount(nn); | |
7944 | #endif | |
1da177e4 LT |
7945 | } |
7946 | ||
7947 | void | |
7948 | nfs4_state_shutdown(void) | |
7949 | { | |
c3935e30 | 7950 | nfsd4_destroy_callback_queue(); |
1da177e4 | 7951 | } |
8b70484c TM |
7952 | |
7953 | static void | |
7954 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7955 | { | |
51100d2b OK |
7956 | if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && |
7957 | CURRENT_STATEID(stateid)) | |
37c593c5 | 7958 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
8b70484c TM |
7959 | } |
7960 | ||
7961 | static void | |
7962 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7963 | { | |
37c593c5 TM |
7964 | if (cstate->minorversion) { |
7965 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
51100d2b | 7966 | SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
37c593c5 TM |
7967 | } |
7968 | } | |
7969 | ||
7970 | void | |
7971 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7972 | { | |
51100d2b | 7973 | CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
8b70484c TM |
7974 | } |
7975 | ||
62cd4a59 TM |
7976 | /* |
7977 | * functions to set current state id | |
7978 | */ | |
9428fe1a | 7979 | void |
b60e9859 CH |
7980 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7981 | union nfsd4_op_u *u) | |
9428fe1a | 7982 | { |
b60e9859 | 7983 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7984 | } |
7985 | ||
8b70484c | 7986 | void |
b60e9859 CH |
7987 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7988 | union nfsd4_op_u *u) | |
8b70484c | 7989 | { |
b60e9859 | 7990 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7991 | } |
7992 | ||
62cd4a59 | 7993 | void |
b60e9859 CH |
7994 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7995 | union nfsd4_op_u *u) | |
62cd4a59 | 7996 | { |
b60e9859 | 7997 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7998 | } |
7999 | ||
8000 | void | |
b60e9859 CH |
8001 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
8002 | union nfsd4_op_u *u) | |
62cd4a59 | 8003 | { |
b60e9859 | 8004 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
8005 | } |
8006 | ||
8007 | /* | |
8008 | * functions to consume current state id | |
8009 | */ | |
1e97b519 | 8010 | |
9428fe1a | 8011 | void |
57832e7b CH |
8012 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8013 | union nfsd4_op_u *u) | |
9428fe1a | 8014 | { |
57832e7b | 8015 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8016 | } |
8017 | ||
8018 | void | |
57832e7b CH |
8019 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
8020 | union nfsd4_op_u *u) | |
9428fe1a | 8021 | { |
57832e7b | 8022 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
8023 | } |
8024 | ||
1e97b519 | 8025 | void |
57832e7b CH |
8026 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
8027 | union nfsd4_op_u *u) | |
1e97b519 | 8028 | { |
57832e7b | 8029 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
8030 | } |
8031 | ||
8032 | void | |
57832e7b CH |
8033 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
8034 | union nfsd4_op_u *u) | |
1e97b519 | 8035 | { |
57832e7b | 8036 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
8037 | } |
8038 | ||
8b70484c | 8039 | void |
57832e7b CH |
8040 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
8041 | union nfsd4_op_u *u) | |
8b70484c | 8042 | { |
57832e7b | 8043 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
8044 | } |
8045 | ||
8046 | void | |
57832e7b CH |
8047 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
8048 | union nfsd4_op_u *u) | |
8b70484c | 8049 | { |
57832e7b | 8050 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 8051 | } |
30813e27 TM |
8052 | |
8053 | void | |
57832e7b CH |
8054 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
8055 | union nfsd4_op_u *u) | |
30813e27 | 8056 | { |
57832e7b | 8057 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
8058 | } |
8059 | ||
8060 | void | |
57832e7b CH |
8061 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
8062 | union nfsd4_op_u *u) | |
30813e27 | 8063 | { |
57832e7b | 8064 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 8065 | } |