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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> |
9a74af21 | 46 | #include "xdr4.h" |
06b332a5 | 47 | #include "xdr4cb.h" |
0a3adade | 48 | #include "vfs.h" |
bfa4b365 | 49 | #include "current_stateid.h" |
1da177e4 | 50 | |
5e1533c7 | 51 | #include "netns.h" |
9cf514cc | 52 | #include "pnfs.h" |
fd4f83fd | 53 | #include "filecache.h" |
5e1533c7 | 54 | |
1da177e4 LT |
55 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
56 | ||
f32f3c2d BF |
57 | #define all_ones {{~0,~0},~0} |
58 | static const stateid_t one_stateid = { | |
59 | .si_generation = ~0, | |
60 | .si_opaque = all_ones, | |
61 | }; | |
62 | static const stateid_t zero_stateid = { | |
63 | /* all fields zero */ | |
64 | }; | |
19ff0f28 TM |
65 | static const stateid_t currentstateid = { |
66 | .si_generation = 1, | |
67 | }; | |
fb500a7c TM |
68 | static const stateid_t close_stateid = { |
69 | .si_generation = 0xffffffffU, | |
70 | }; | |
f32f3c2d | 71 | |
ec6b5d7b | 72 | static u64 current_sessionid = 1; |
fd39ca9a | 73 | |
f32f3c2d BF |
74 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
75 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) | |
19ff0f28 | 76 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
ae254dac | 77 | #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) |
1da177e4 | 78 | |
1da177e4 | 79 | /* forward declarations */ |
f9c00c3a | 80 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
6011695d | 81 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
362063a5 | 82 | void nfsd4_end_grace(struct nfsd_net *nn); |
624322f1 | 83 | static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); |
1da177e4 | 84 | |
8b671b80 BF |
85 | /* Locking: */ |
86 | ||
8b671b80 BF |
87 | /* |
88 | * Currently used for the del_recall_lru and file hash table. In an | |
89 | * effort to decrease the scope of the client_mutex, this spinlock may | |
90 | * eventually cover more: | |
91 | */ | |
cdc97505 | 92 | static DEFINE_SPINLOCK(state_lock); |
8b671b80 | 93 | |
4f34bd05 AE |
94 | enum nfsd4_st_mutex_lock_subclass { |
95 | OPEN_STATEID_MUTEX = 0, | |
96 | LOCK_STATEID_MUTEX = 1, | |
97 | }; | |
98 | ||
b401be22 JL |
99 | /* |
100 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for | |
101 | * the refcount on the open stateid to drop. | |
102 | */ | |
103 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); | |
104 | ||
89c905be BF |
105 | /* |
106 | * A waitqueue where a writer to clients/#/ctl destroying a client can | |
107 | * wait for cl_rpc_users to drop to 0 and then for the client to be | |
108 | * unhashed. | |
109 | */ | |
110 | static DECLARE_WAIT_QUEUE_HEAD(expiry_wq); | |
111 | ||
9258a2d5 | 112 | static struct kmem_cache *client_slab; |
abf1135b CH |
113 | static struct kmem_cache *openowner_slab; |
114 | static struct kmem_cache *lockowner_slab; | |
115 | static struct kmem_cache *file_slab; | |
116 | static struct kmem_cache *stateid_slab; | |
117 | static struct kmem_cache *deleg_slab; | |
8287f009 | 118 | static struct kmem_cache *odstate_slab; |
e60d4398 | 119 | |
66b2b9b2 | 120 | static void free_session(struct nfsd4_session *); |
508dc6e1 | 121 | |
c4cb8974 | 122 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
76d348fa | 123 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
0162ac2b | 124 | |
f0f51f5c | 125 | static bool is_session_dead(struct nfsd4_session *ses) |
66b2b9b2 | 126 | { |
f0f51f5c | 127 | return ses->se_flags & NFS4_SESSION_DEAD; |
66b2b9b2 BF |
128 | } |
129 | ||
f0f51f5c | 130 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
508dc6e1 | 131 | { |
f0f51f5c | 132 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
66b2b9b2 BF |
133 | return nfserr_jukebox; |
134 | ses->se_flags |= NFS4_SESSION_DEAD; | |
135 | return nfs_ok; | |
508dc6e1 BH |
136 | } |
137 | ||
221a6876 BF |
138 | static bool is_client_expired(struct nfs4_client *clp) |
139 | { | |
140 | return clp->cl_time == 0; | |
141 | } | |
142 | ||
221a6876 BF |
143 | static __be32 get_client_locked(struct nfs4_client *clp) |
144 | { | |
0a880a28 TM |
145 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
146 | ||
147 | lockdep_assert_held(&nn->client_lock); | |
148 | ||
221a6876 BF |
149 | if (is_client_expired(clp)) |
150 | return nfserr_expired; | |
14ed14cc | 151 | atomic_inc(&clp->cl_rpc_users); |
221a6876 BF |
152 | return nfs_ok; |
153 | } | |
154 | ||
155 | /* must be called under the client_lock */ | |
156 | static inline void | |
157 | renew_client_locked(struct nfs4_client *clp) | |
158 | { | |
159 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
160 | ||
161 | if (is_client_expired(clp)) { | |
162 | WARN_ON(1); | |
163 | printk("%s: client (clientid %08x/%08x) already expired\n", | |
164 | __func__, | |
165 | clp->cl_clientid.cl_boot, | |
166 | clp->cl_clientid.cl_id); | |
167 | return; | |
168 | } | |
169 | ||
170 | dprintk("renewing client (clientid %08x/%08x)\n", | |
171 | clp->cl_clientid.cl_boot, | |
172 | clp->cl_clientid.cl_id); | |
173 | list_move_tail(&clp->cl_lru, &nn->client_lru); | |
20b7d86f | 174 | clp->cl_time = ktime_get_boottime_seconds(); |
221a6876 BF |
175 | } |
176 | ||
ba138435 | 177 | static void put_client_renew_locked(struct nfs4_client *clp) |
221a6876 | 178 | { |
0a880a28 TM |
179 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
180 | ||
181 | lockdep_assert_held(&nn->client_lock); | |
182 | ||
14ed14cc | 183 | if (!atomic_dec_and_test(&clp->cl_rpc_users)) |
221a6876 BF |
184 | return; |
185 | if (!is_client_expired(clp)) | |
186 | renew_client_locked(clp); | |
89c905be BF |
187 | else |
188 | wake_up_all(&expiry_wq); | |
221a6876 BF |
189 | } |
190 | ||
4b24ca7d JL |
191 | static void put_client_renew(struct nfs4_client *clp) |
192 | { | |
193 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
194 | ||
14ed14cc | 195 | if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) |
d6c249b4 JL |
196 | return; |
197 | if (!is_client_expired(clp)) | |
198 | renew_client_locked(clp); | |
89c905be BF |
199 | else |
200 | wake_up_all(&expiry_wq); | |
4b24ca7d JL |
201 | spin_unlock(&nn->client_lock); |
202 | } | |
203 | ||
d4e19e70 TM |
204 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
205 | { | |
206 | __be32 status; | |
207 | ||
208 | if (is_session_dead(ses)) | |
209 | return nfserr_badsession; | |
210 | status = get_client_locked(ses->se_client); | |
211 | if (status) | |
212 | return status; | |
213 | atomic_inc(&ses->se_ref); | |
214 | return nfs_ok; | |
215 | } | |
216 | ||
217 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) | |
218 | { | |
219 | struct nfs4_client *clp = ses->se_client; | |
0a880a28 TM |
220 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
221 | ||
222 | lockdep_assert_held(&nn->client_lock); | |
d4e19e70 TM |
223 | |
224 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) | |
225 | free_session(ses); | |
226 | put_client_renew_locked(clp); | |
227 | } | |
228 | ||
229 | static void nfsd4_put_session(struct nfsd4_session *ses) | |
230 | { | |
231 | struct nfs4_client *clp = ses->se_client; | |
232 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
233 | ||
234 | spin_lock(&nn->client_lock); | |
235 | nfsd4_put_session_locked(ses); | |
236 | spin_unlock(&nn->client_lock); | |
237 | } | |
238 | ||
76d348fa JL |
239 | static struct nfsd4_blocked_lock * |
240 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
241 | struct nfsd_net *nn) | |
242 | { | |
243 | struct nfsd4_blocked_lock *cur, *found = NULL; | |
244 | ||
0cc11a61 | 245 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
246 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
247 | if (fh_match(fh, &cur->nbl_fh)) { | |
248 | list_del_init(&cur->nbl_list); | |
7919d0a2 | 249 | list_del_init(&cur->nbl_lru); |
76d348fa JL |
250 | found = cur; |
251 | break; | |
252 | } | |
253 | } | |
0cc11a61 | 254 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa | 255 | if (found) |
cb03f94f | 256 | locks_delete_block(&found->nbl_lock); |
76d348fa JL |
257 | return found; |
258 | } | |
259 | ||
260 | static struct nfsd4_blocked_lock * | |
261 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, | |
262 | struct nfsd_net *nn) | |
263 | { | |
264 | struct nfsd4_blocked_lock *nbl; | |
265 | ||
266 | nbl = find_blocked_lock(lo, fh, nn); | |
267 | if (!nbl) { | |
268 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); | |
269 | if (nbl) { | |
e1e8399e VA |
270 | INIT_LIST_HEAD(&nbl->nbl_list); |
271 | INIT_LIST_HEAD(&nbl->nbl_lru); | |
76d348fa JL |
272 | fh_copy_shallow(&nbl->nbl_fh, fh); |
273 | locks_init_lock(&nbl->nbl_lock); | |
274 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, | |
275 | &nfsd4_cb_notify_lock_ops, | |
276 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); | |
277 | } | |
278 | } | |
279 | return nbl; | |
280 | } | |
281 | ||
282 | static void | |
283 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) | |
284 | { | |
6aaafc43 | 285 | locks_delete_block(&nbl->nbl_lock); |
76d348fa JL |
286 | locks_release_private(&nbl->nbl_lock); |
287 | kfree(nbl); | |
288 | } | |
289 | ||
68ef3bc3 JL |
290 | static void |
291 | remove_blocked_locks(struct nfs4_lockowner *lo) | |
292 | { | |
293 | struct nfs4_client *clp = lo->lo_owner.so_client; | |
294 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
295 | struct nfsd4_blocked_lock *nbl; | |
296 | LIST_HEAD(reaplist); | |
297 | ||
298 | /* Dequeue all blocked locks */ | |
299 | spin_lock(&nn->blocked_locks_lock); | |
300 | while (!list_empty(&lo->lo_blocked)) { | |
301 | nbl = list_first_entry(&lo->lo_blocked, | |
302 | struct nfsd4_blocked_lock, | |
303 | nbl_list); | |
304 | list_del_init(&nbl->nbl_list); | |
305 | list_move(&nbl->nbl_lru, &reaplist); | |
306 | } | |
307 | spin_unlock(&nn->blocked_locks_lock); | |
308 | ||
309 | /* Now free them */ | |
310 | while (!list_empty(&reaplist)) { | |
311 | nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, | |
312 | nbl_lru); | |
313 | list_del_init(&nbl->nbl_lru); | |
68ef3bc3 JL |
314 | free_blocked_lock(nbl); |
315 | } | |
316 | } | |
317 | ||
f456458e JL |
318 | static void |
319 | nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) | |
320 | { | |
321 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
322 | struct nfsd4_blocked_lock, nbl_cb); | |
323 | locks_delete_block(&nbl->nbl_lock); | |
324 | } | |
325 | ||
76d348fa JL |
326 | static int |
327 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) | |
328 | { | |
329 | /* | |
330 | * Since this is just an optimization, we don't try very hard if it | |
331 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and | |
332 | * just quit trying on anything else. | |
333 | */ | |
334 | switch (task->tk_status) { | |
335 | case -NFS4ERR_DELAY: | |
336 | rpc_delay(task, 1 * HZ); | |
337 | return 0; | |
338 | default: | |
339 | return 1; | |
340 | } | |
341 | } | |
342 | ||
343 | static void | |
344 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) | |
345 | { | |
346 | struct nfsd4_blocked_lock *nbl = container_of(cb, | |
347 | struct nfsd4_blocked_lock, nbl_cb); | |
348 | ||
349 | free_blocked_lock(nbl); | |
350 | } | |
351 | ||
352 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { | |
f456458e | 353 | .prepare = nfsd4_cb_notify_lock_prepare, |
76d348fa JL |
354 | .done = nfsd4_cb_notify_lock_done, |
355 | .release = nfsd4_cb_notify_lock_release, | |
356 | }; | |
357 | ||
b5971afa KM |
358 | static inline struct nfs4_stateowner * |
359 | nfs4_get_stateowner(struct nfs4_stateowner *sop) | |
360 | { | |
361 | atomic_inc(&sop->so_count); | |
362 | return sop; | |
363 | } | |
364 | ||
7ffb5880 | 365 | static int |
d4f0489f | 366 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
7ffb5880 TM |
367 | { |
368 | return (sop->so_owner.len == owner->len) && | |
d4f0489f | 369 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
7ffb5880 TM |
370 | } |
371 | ||
372 | static struct nfs4_openowner * | |
373 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 374 | struct nfs4_client *clp) |
7ffb5880 TM |
375 | { |
376 | struct nfs4_stateowner *so; | |
7ffb5880 | 377 | |
d4f0489f | 378 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 379 | |
d4f0489f TM |
380 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
381 | so_strhash) { | |
7ffb5880 TM |
382 | if (!so->so_is_open_owner) |
383 | continue; | |
b5971afa KM |
384 | if (same_owner_str(so, &open->op_owner)) |
385 | return openowner(nfs4_get_stateowner(so)); | |
7ffb5880 TM |
386 | } |
387 | return NULL; | |
388 | } | |
389 | ||
390 | static struct nfs4_openowner * | |
391 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, | |
d4f0489f | 392 | struct nfs4_client *clp) |
7ffb5880 TM |
393 | { |
394 | struct nfs4_openowner *oo; | |
395 | ||
d4f0489f TM |
396 | spin_lock(&clp->cl_lock); |
397 | oo = find_openstateowner_str_locked(hashval, open, clp); | |
398 | spin_unlock(&clp->cl_lock); | |
7ffb5880 TM |
399 | return oo; |
400 | } | |
401 | ||
1da177e4 LT |
402 | static inline u32 |
403 | opaque_hashval(const void *ptr, int nbytes) | |
404 | { | |
405 | unsigned char *cptr = (unsigned char *) ptr; | |
406 | ||
407 | u32 x = 0; | |
408 | while (nbytes--) { | |
409 | x *= 37; | |
410 | x += *cptr++; | |
411 | } | |
412 | return x; | |
413 | } | |
414 | ||
5b095e99 | 415 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
32513b40 | 416 | { |
5b095e99 JL |
417 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
418 | ||
419 | kmem_cache_free(file_slab, fp); | |
32513b40 BF |
420 | } |
421 | ||
e6ba76e1 | 422 | void |
13cd2184 N |
423 | put_nfs4_file(struct nfs4_file *fi) |
424 | { | |
02e1215f JL |
425 | might_lock(&state_lock); |
426 | ||
818a34eb | 427 | if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { |
5b095e99 | 428 | hlist_del_rcu(&fi->fi_hash); |
cdc97505 | 429 | spin_unlock(&state_lock); |
8287f009 | 430 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
5b095e99 JL |
431 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
432 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); | |
8b671b80 | 433 | } |
13cd2184 N |
434 | } |
435 | ||
eb82dd39 | 436 | static struct nfsd_file * |
de18643d TM |
437 | __nfs4_get_fd(struct nfs4_file *f, int oflag) |
438 | { | |
439 | if (f->fi_fds[oflag]) | |
eb82dd39 | 440 | return nfsd_file_get(f->fi_fds[oflag]); |
de18643d TM |
441 | return NULL; |
442 | } | |
443 | ||
eb82dd39 | 444 | static struct nfsd_file * |
de18643d TM |
445 | find_writeable_file_locked(struct nfs4_file *f) |
446 | { | |
eb82dd39 | 447 | struct nfsd_file *ret; |
de18643d TM |
448 | |
449 | lockdep_assert_held(&f->fi_lock); | |
450 | ||
451 | ret = __nfs4_get_fd(f, O_WRONLY); | |
452 | if (!ret) | |
453 | ret = __nfs4_get_fd(f, O_RDWR); | |
454 | return ret; | |
455 | } | |
456 | ||
eb82dd39 | 457 | static struct nfsd_file * |
de18643d TM |
458 | find_writeable_file(struct nfs4_file *f) |
459 | { | |
eb82dd39 | 460 | struct nfsd_file *ret; |
de18643d TM |
461 | |
462 | spin_lock(&f->fi_lock); | |
463 | ret = find_writeable_file_locked(f); | |
464 | spin_unlock(&f->fi_lock); | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
eb82dd39 JL |
469 | static struct nfsd_file * |
470 | find_readable_file_locked(struct nfs4_file *f) | |
de18643d | 471 | { |
eb82dd39 | 472 | struct nfsd_file *ret; |
de18643d TM |
473 | |
474 | lockdep_assert_held(&f->fi_lock); | |
475 | ||
476 | ret = __nfs4_get_fd(f, O_RDONLY); | |
477 | if (!ret) | |
478 | ret = __nfs4_get_fd(f, O_RDWR); | |
479 | return ret; | |
480 | } | |
481 | ||
eb82dd39 | 482 | static struct nfsd_file * |
de18643d TM |
483 | find_readable_file(struct nfs4_file *f) |
484 | { | |
eb82dd39 | 485 | struct nfsd_file *ret; |
de18643d TM |
486 | |
487 | spin_lock(&f->fi_lock); | |
488 | ret = find_readable_file_locked(f); | |
489 | spin_unlock(&f->fi_lock); | |
490 | ||
491 | return ret; | |
492 | } | |
493 | ||
eb82dd39 | 494 | struct nfsd_file * |
de18643d TM |
495 | find_any_file(struct nfs4_file *f) |
496 | { | |
eb82dd39 | 497 | struct nfsd_file *ret; |
de18643d | 498 | |
a451b123 TM |
499 | if (!f) |
500 | return NULL; | |
de18643d TM |
501 | spin_lock(&f->fi_lock); |
502 | ret = __nfs4_get_fd(f, O_RDWR); | |
503 | if (!ret) { | |
504 | ret = __nfs4_get_fd(f, O_WRONLY); | |
505 | if (!ret) | |
506 | ret = __nfs4_get_fd(f, O_RDONLY); | |
507 | } | |
508 | spin_unlock(&f->fi_lock); | |
509 | return ret; | |
510 | } | |
511 | ||
02a3508d | 512 | static atomic_long_t num_delegations; |
697ce9be | 513 | unsigned long max_delegations; |
ef0f3390 N |
514 | |
515 | /* | |
516 | * Open owner state (share locks) | |
517 | */ | |
518 | ||
16bfdaaf BF |
519 | /* hash tables for lock and open owners */ |
520 | #define OWNER_HASH_BITS 8 | |
521 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
522 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
ef0f3390 | 523 | |
d4f0489f | 524 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
ddc04c41 BF |
525 | { |
526 | unsigned int ret; | |
527 | ||
528 | ret = opaque_hashval(ownername->data, ownername->len); | |
16bfdaaf | 529 | return ret & OWNER_HASH_MASK; |
ddc04c41 | 530 | } |
ef0f3390 | 531 | |
ef0f3390 N |
532 | /* hash table for nfs4_file */ |
533 | #define FILE_HASH_BITS 8 | |
534 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 535 | |
ca943217 | 536 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
ddc04c41 | 537 | { |
ca943217 TM |
538 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
539 | } | |
540 | ||
541 | static unsigned int file_hashval(struct knfsd_fh *fh) | |
542 | { | |
543 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); | |
544 | } | |
545 | ||
89876f8c | 546 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
ef0f3390 | 547 | |
12659651 JL |
548 | static void |
549 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
3477565e | 550 | { |
7214e860 JL |
551 | lockdep_assert_held(&fp->fi_lock); |
552 | ||
12659651 JL |
553 | if (access & NFS4_SHARE_ACCESS_WRITE) |
554 | atomic_inc(&fp->fi_access[O_WRONLY]); | |
555 | if (access & NFS4_SHARE_ACCESS_READ) | |
556 | atomic_inc(&fp->fi_access[O_RDONLY]); | |
3477565e BF |
557 | } |
558 | ||
12659651 JL |
559 | static __be32 |
560 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) | |
998db52c | 561 | { |
7214e860 JL |
562 | lockdep_assert_held(&fp->fi_lock); |
563 | ||
12659651 JL |
564 | /* Does this access mode make sense? */ |
565 | if (access & ~NFS4_SHARE_ACCESS_BOTH) | |
566 | return nfserr_inval; | |
567 | ||
baeb4ff0 JL |
568 | /* Does it conflict with a deny mode already set? */ |
569 | if ((access & fp->fi_share_deny) != 0) | |
570 | return nfserr_share_denied; | |
571 | ||
12659651 JL |
572 | __nfs4_file_get_access(fp, access); |
573 | return nfs_ok; | |
998db52c BF |
574 | } |
575 | ||
baeb4ff0 JL |
576 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
577 | { | |
578 | /* Common case is that there is no deny mode. */ | |
579 | if (deny) { | |
580 | /* Does this deny mode make sense? */ | |
581 | if (deny & ~NFS4_SHARE_DENY_BOTH) | |
582 | return nfserr_inval; | |
583 | ||
584 | if ((deny & NFS4_SHARE_DENY_READ) && | |
585 | atomic_read(&fp->fi_access[O_RDONLY])) | |
586 | return nfserr_share_denied; | |
587 | ||
588 | if ((deny & NFS4_SHARE_DENY_WRITE) && | |
589 | atomic_read(&fp->fi_access[O_WRONLY])) | |
590 | return nfserr_share_denied; | |
591 | } | |
592 | return nfs_ok; | |
593 | } | |
594 | ||
998db52c | 595 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f | 596 | { |
de18643d TM |
597 | might_lock(&fp->fi_lock); |
598 | ||
599 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { | |
fd4f83fd JL |
600 | struct nfsd_file *f1 = NULL; |
601 | struct nfsd_file *f2 = NULL; | |
de18643d | 602 | |
6d338b51 | 603 | swap(f1, fp->fi_fds[oflag]); |
0c7c3e67 | 604 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
6d338b51 | 605 | swap(f2, fp->fi_fds[O_RDWR]); |
de18643d TM |
606 | spin_unlock(&fp->fi_lock); |
607 | if (f1) | |
fd4f83fd | 608 | nfsd_file_put(f1); |
de18643d | 609 | if (f2) |
fd4f83fd | 610 | nfsd_file_put(f2); |
f9d7562f BF |
611 | } |
612 | } | |
613 | ||
12659651 | 614 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
998db52c | 615 | { |
12659651 JL |
616 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
617 | ||
618 | if (access & NFS4_SHARE_ACCESS_WRITE) | |
998db52c | 619 | __nfs4_file_put_access(fp, O_WRONLY); |
12659651 JL |
620 | if (access & NFS4_SHARE_ACCESS_READ) |
621 | __nfs4_file_put_access(fp, O_RDONLY); | |
998db52c BF |
622 | } |
623 | ||
8287f009 SB |
624 | /* |
625 | * Allocate a new open/delegation state counter. This is needed for | |
626 | * pNFS for proper return on close semantics. | |
627 | * | |
628 | * Note that we only allocate it for pNFS-enabled exports, otherwise | |
629 | * all pointers to struct nfs4_clnt_odstate are always NULL. | |
630 | */ | |
631 | static struct nfs4_clnt_odstate * | |
632 | alloc_clnt_odstate(struct nfs4_client *clp) | |
633 | { | |
634 | struct nfs4_clnt_odstate *co; | |
635 | ||
636 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); | |
637 | if (co) { | |
638 | co->co_client = clp; | |
cff7cb2e | 639 | refcount_set(&co->co_odcount, 1); |
8287f009 SB |
640 | } |
641 | return co; | |
642 | } | |
643 | ||
644 | static void | |
645 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) | |
646 | { | |
647 | struct nfs4_file *fp = co->co_file; | |
648 | ||
649 | lockdep_assert_held(&fp->fi_lock); | |
650 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); | |
651 | } | |
652 | ||
653 | static inline void | |
654 | get_clnt_odstate(struct nfs4_clnt_odstate *co) | |
655 | { | |
656 | if (co) | |
cff7cb2e | 657 | refcount_inc(&co->co_odcount); |
8287f009 SB |
658 | } |
659 | ||
660 | static void | |
661 | put_clnt_odstate(struct nfs4_clnt_odstate *co) | |
662 | { | |
663 | struct nfs4_file *fp; | |
664 | ||
665 | if (!co) | |
666 | return; | |
667 | ||
668 | fp = co->co_file; | |
cff7cb2e | 669 | if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
8287f009 SB |
670 | list_del(&co->co_perfile); |
671 | spin_unlock(&fp->fi_lock); | |
672 | ||
673 | nfsd4_return_all_file_layouts(co->co_client, fp); | |
674 | kmem_cache_free(odstate_slab, co); | |
675 | } | |
676 | } | |
677 | ||
678 | static struct nfs4_clnt_odstate * | |
679 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) | |
680 | { | |
681 | struct nfs4_clnt_odstate *co; | |
682 | struct nfs4_client *cl; | |
683 | ||
684 | if (!new) | |
685 | return NULL; | |
686 | ||
687 | cl = new->co_client; | |
688 | ||
689 | spin_lock(&fp->fi_lock); | |
690 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { | |
691 | if (co->co_client == cl) { | |
692 | get_clnt_odstate(co); | |
693 | goto out; | |
694 | } | |
695 | } | |
696 | co = new; | |
697 | co->co_file = fp; | |
698 | hash_clnt_odstate_locked(new); | |
699 | out: | |
700 | spin_unlock(&fp->fi_lock); | |
701 | return co; | |
702 | } | |
703 | ||
d19fb70d KM |
704 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
705 | void (*sc_free)(struct nfs4_stid *)) | |
2a74aba7 | 706 | { |
3abdb607 | 707 | struct nfs4_stid *stid; |
6136d2b4 | 708 | int new_id; |
2a74aba7 | 709 | |
f8338834 | 710 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
3abdb607 BF |
711 | if (!stid) |
712 | return NULL; | |
713 | ||
4770d722 JL |
714 | idr_preload(GFP_KERNEL); |
715 | spin_lock(&cl->cl_lock); | |
78599c42 BF |
716 | /* Reserving 0 for start of file in nfsdfs "states" file: */ |
717 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); | |
4770d722 JL |
718 | spin_unlock(&cl->cl_lock); |
719 | idr_preload_end(); | |
ebd6c707 | 720 | if (new_id < 0) |
3abdb607 | 721 | goto out_free; |
d19fb70d KM |
722 | |
723 | stid->sc_free = sc_free; | |
2a74aba7 | 724 | stid->sc_client = cl; |
3abdb607 BF |
725 | stid->sc_stateid.si_opaque.so_id = new_id; |
726 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; | |
2a74aba7 | 727 | /* Will be incremented before return to client: */ |
a15dfcd5 | 728 | refcount_set(&stid->sc_count, 1); |
9767feb2 | 729 | spin_lock_init(&stid->sc_lock); |
624322f1 | 730 | INIT_LIST_HEAD(&stid->sc_cp_list); |
996e0938 | 731 | |
996e0938 | 732 | /* |
3abdb607 BF |
733 | * It shouldn't be a problem to reuse an opaque stateid value. |
734 | * I don't think it is for 4.1. But with 4.0 I worry that, for | |
735 | * example, a stray write retransmission could be accepted by | |
736 | * the server when it should have been rejected. Therefore, | |
737 | * adopt a trick from the sctp code to attempt to maximize the | |
738 | * amount of time until an id is reused, by ensuring they always | |
739 | * "increase" (mod INT_MAX): | |
996e0938 | 740 | */ |
3abdb607 BF |
741 | return stid; |
742 | out_free: | |
2c44a234 | 743 | kmem_cache_free(slab, stid); |
3abdb607 | 744 | return NULL; |
2a74aba7 BF |
745 | } |
746 | ||
e0639dc5 OK |
747 | /* |
748 | * Create a unique stateid_t to represent each COPY. | |
749 | */ | |
624322f1 OK |
750 | static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, |
751 | unsigned char sc_type) | |
e0639dc5 OK |
752 | { |
753 | int new_id; | |
754 | ||
9cc76801 | 755 | stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; |
624322f1 OK |
756 | stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; |
757 | stid->sc_type = sc_type; | |
758 | ||
e0639dc5 OK |
759 | idr_preload(GFP_KERNEL); |
760 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 OK |
761 | new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); |
762 | stid->stid.si_opaque.so_id = new_id; | |
e0639dc5 OK |
763 | spin_unlock(&nn->s2s_cp_lock); |
764 | idr_preload_end(); | |
765 | if (new_id < 0) | |
766 | return 0; | |
e0639dc5 OK |
767 | return 1; |
768 | } | |
769 | ||
624322f1 OK |
770 | int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) |
771 | { | |
772 | return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); | |
773 | } | |
774 | ||
775 | struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, | |
776 | struct nfs4_stid *p_stid) | |
777 | { | |
778 | struct nfs4_cpntf_state *cps; | |
779 | ||
780 | cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); | |
781 | if (!cps) | |
782 | return NULL; | |
20b7d86f | 783 | cps->cpntf_time = ktime_get_boottime_seconds(); |
624322f1 OK |
784 | refcount_set(&cps->cp_stateid.sc_count, 1); |
785 | if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) | |
786 | goto out_free; | |
787 | spin_lock(&nn->s2s_cp_lock); | |
788 | list_add(&cps->cp_list, &p_stid->sc_cp_list); | |
789 | spin_unlock(&nn->s2s_cp_lock); | |
790 | return cps; | |
791 | out_free: | |
792 | kfree(cps); | |
793 | return NULL; | |
794 | } | |
795 | ||
796 | void nfs4_free_copy_state(struct nfsd4_copy *copy) | |
e0639dc5 OK |
797 | { |
798 | struct nfsd_net *nn; | |
799 | ||
624322f1 | 800 | WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID); |
e0639dc5 OK |
801 | nn = net_generic(copy->cp_clp->net, nfsd_net_id); |
802 | spin_lock(&nn->s2s_cp_lock); | |
624322f1 OK |
803 | idr_remove(&nn->s2s_cp_stateids, |
804 | copy->cp_stateid.stid.si_opaque.so_id); | |
805 | spin_unlock(&nn->s2s_cp_lock); | |
806 | } | |
807 | ||
808 | static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) | |
809 | { | |
810 | struct nfs4_cpntf_state *cps; | |
811 | struct nfsd_net *nn; | |
812 | ||
813 | nn = net_generic(net, nfsd_net_id); | |
814 | spin_lock(&nn->s2s_cp_lock); | |
815 | while (!list_empty(&stid->sc_cp_list)) { | |
816 | cps = list_first_entry(&stid->sc_cp_list, | |
817 | struct nfs4_cpntf_state, cp_list); | |
818 | _free_cpntf_state_locked(nn, cps); | |
819 | } | |
e0639dc5 OK |
820 | spin_unlock(&nn->s2s_cp_lock); |
821 | } | |
822 | ||
b49e084d | 823 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
4cdc951b | 824 | { |
6011695d | 825 | struct nfs4_stid *stid; |
6011695d | 826 | |
d19fb70d | 827 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
6011695d TM |
828 | if (!stid) |
829 | return NULL; | |
830 | ||
d19fb70d | 831 | return openlockstateid(stid); |
6011695d TM |
832 | } |
833 | ||
834 | static void nfs4_free_deleg(struct nfs4_stid *stid) | |
835 | { | |
6011695d TM |
836 | kmem_cache_free(deleg_slab, stid); |
837 | atomic_long_dec(&num_delegations); | |
4cdc951b BF |
838 | } |
839 | ||
6282cd56 N |
840 | /* |
841 | * When we recall a delegation, we should be careful not to hand it | |
842 | * out again straight away. | |
843 | * To ensure this we keep a pair of bloom filters ('new' and 'old') | |
844 | * in which the filehandles of recalled delegations are "stored". | |
845 | * If a filehandle appear in either filter, a delegation is blocked. | |
846 | * When a delegation is recalled, the filehandle is stored in the "new" | |
847 | * filter. | |
848 | * Every 30 seconds we swap the filters and clear the "new" one, | |
849 | * unless both are empty of course. | |
850 | * | |
851 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the | |
852 | * low 3 bytes as hash-table indices. | |
853 | * | |
f54fe962 | 854 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
6282cd56 N |
855 | * is used to manage concurrent access. Testing does not need the lock |
856 | * except when swapping the two filters. | |
857 | */ | |
f54fe962 | 858 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
6282cd56 N |
859 | static struct bloom_pair { |
860 | int entries, old_entries; | |
b3f255ef | 861 | time64_t swap_time; |
6282cd56 N |
862 | int new; /* index into 'set' */ |
863 | DECLARE_BITMAP(set[2], 256); | |
864 | } blocked_delegations; | |
865 | ||
866 | static int delegation_blocked(struct knfsd_fh *fh) | |
867 | { | |
868 | u32 hash; | |
869 | struct bloom_pair *bd = &blocked_delegations; | |
870 | ||
871 | if (bd->entries == 0) | |
872 | return 0; | |
b3f255ef | 873 | if (ktime_get_seconds() - bd->swap_time > 30) { |
f54fe962 | 874 | spin_lock(&blocked_delegations_lock); |
b3f255ef | 875 | if (ktime_get_seconds() - bd->swap_time > 30) { |
6282cd56 N |
876 | bd->entries -= bd->old_entries; |
877 | bd->old_entries = bd->entries; | |
878 | memset(bd->set[bd->new], 0, | |
879 | sizeof(bd->set[0])); | |
880 | bd->new = 1-bd->new; | |
b3f255ef | 881 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 882 | } |
f54fe962 | 883 | spin_unlock(&blocked_delegations_lock); |
6282cd56 | 884 | } |
87545899 | 885 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 N |
886 | if (test_bit(hash&255, bd->set[0]) && |
887 | test_bit((hash>>8)&255, bd->set[0]) && | |
888 | test_bit((hash>>16)&255, bd->set[0])) | |
889 | return 1; | |
890 | ||
891 | if (test_bit(hash&255, bd->set[1]) && | |
892 | test_bit((hash>>8)&255, bd->set[1]) && | |
893 | test_bit((hash>>16)&255, bd->set[1])) | |
894 | return 1; | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static void block_delegations(struct knfsd_fh *fh) | |
900 | { | |
901 | u32 hash; | |
902 | struct bloom_pair *bd = &blocked_delegations; | |
903 | ||
87545899 | 904 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
6282cd56 | 905 | |
f54fe962 | 906 | spin_lock(&blocked_delegations_lock); |
6282cd56 N |
907 | __set_bit(hash&255, bd->set[bd->new]); |
908 | __set_bit((hash>>8)&255, bd->set[bd->new]); | |
909 | __set_bit((hash>>16)&255, bd->set[bd->new]); | |
910 | if (bd->entries == 0) | |
b3f255ef | 911 | bd->swap_time = ktime_get_seconds(); |
6282cd56 | 912 | bd->entries += 1; |
f54fe962 | 913 | spin_unlock(&blocked_delegations_lock); |
6282cd56 N |
914 | } |
915 | ||
1da177e4 | 916 | static struct nfs4_delegation * |
86d29b10 BF |
917 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, |
918 | struct svc_fh *current_fh, | |
8287f009 | 919 | struct nfs4_clnt_odstate *odstate) |
1da177e4 LT |
920 | { |
921 | struct nfs4_delegation *dp; | |
02a3508d | 922 | long n; |
1da177e4 LT |
923 | |
924 | dprintk("NFSD alloc_init_deleg\n"); | |
02a3508d TM |
925 | n = atomic_long_inc_return(&num_delegations); |
926 | if (n < 0 || n > max_delegations) | |
927 | goto out_dec; | |
6282cd56 | 928 | if (delegation_blocked(¤t_fh->fh_handle)) |
02a3508d | 929 | goto out_dec; |
d19fb70d | 930 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
5b2d21c1 | 931 | if (dp == NULL) |
02a3508d | 932 | goto out_dec; |
6011695d | 933 | |
2a74aba7 BF |
934 | /* |
935 | * delegation seqid's are never incremented. The 4.1 special | |
6136d2b4 BF |
936 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
937 | * 0 anyway just for consistency and use 1: | |
2a74aba7 BF |
938 | */ |
939 | dp->dl_stid.sc_stateid.si_generation = 1; | |
ea1da636 N |
940 | INIT_LIST_HEAD(&dp->dl_perfile); |
941 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 | 942 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
8287f009 SB |
943 | dp->dl_clnt_odstate = odstate; |
944 | get_clnt_odstate(odstate); | |
99c41515 | 945 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
f0b5de1b CH |
946 | dp->dl_retries = 1; |
947 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, | |
0162ac2b | 948 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
86d29b10 BF |
949 | get_nfs4_file(fp); |
950 | dp->dl_stid.sc_file = fp; | |
1da177e4 | 951 | return dp; |
02a3508d TM |
952 | out_dec: |
953 | atomic_long_dec(&num_delegations); | |
954 | return NULL; | |
1da177e4 LT |
955 | } |
956 | ||
957 | void | |
6011695d | 958 | nfs4_put_stid(struct nfs4_stid *s) |
1da177e4 | 959 | { |
11b9164a | 960 | struct nfs4_file *fp = s->sc_file; |
6011695d TM |
961 | struct nfs4_client *clp = s->sc_client; |
962 | ||
4770d722 JL |
963 | might_lock(&clp->cl_lock); |
964 | ||
a15dfcd5 | 965 | if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
b401be22 | 966 | wake_up_all(&close_wq); |
6011695d | 967 | return; |
b401be22 | 968 | } |
6011695d | 969 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
624322f1 | 970 | nfs4_free_cpntf_statelist(clp->net, s); |
4770d722 | 971 | spin_unlock(&clp->cl_lock); |
6011695d | 972 | s->sc_free(s); |
11b9164a TM |
973 | if (fp) |
974 | put_nfs4_file(fp); | |
1da177e4 LT |
975 | } |
976 | ||
9767feb2 JL |
977 | void |
978 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) | |
979 | { | |
980 | stateid_t *src = &stid->sc_stateid; | |
981 | ||
982 | spin_lock(&stid->sc_lock); | |
983 | if (unlikely(++src->si_generation == 0)) | |
984 | src->si_generation = 1; | |
985 | memcpy(dst, src, sizeof(*dst)); | |
986 | spin_unlock(&stid->sc_lock); | |
987 | } | |
988 | ||
353601e7 | 989 | static void put_deleg_file(struct nfs4_file *fp) |
1da177e4 | 990 | { |
eb82dd39 | 991 | struct nfsd_file *nf = NULL; |
b8232d33 | 992 | |
6bcc034e | 993 | spin_lock(&fp->fi_lock); |
353601e7 | 994 | if (--fp->fi_delegees == 0) |
eb82dd39 | 995 | swap(nf, fp->fi_deleg_file); |
6bcc034e JL |
996 | spin_unlock(&fp->fi_lock); |
997 | ||
eb82dd39 JL |
998 | if (nf) |
999 | nfsd_file_put(nf); | |
353601e7 BF |
1000 | } |
1001 | ||
1002 | static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) | |
1003 | { | |
1004 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
eb82dd39 | 1005 | struct nfsd_file *nf = fp->fi_deleg_file; |
353601e7 BF |
1006 | |
1007 | WARN_ON_ONCE(!fp->fi_delegees); | |
1008 | ||
eb82dd39 | 1009 | vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 | 1010 | put_deleg_file(fp); |
1da177e4 LT |
1011 | } |
1012 | ||
0af6e690 BF |
1013 | static void destroy_unhashed_deleg(struct nfs4_delegation *dp) |
1014 | { | |
1015 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 | 1016 | nfs4_unlock_deleg_lease(dp); |
0af6e690 BF |
1017 | nfs4_put_stid(&dp->dl_stid); |
1018 | } | |
1019 | ||
cd61c522 | 1020 | void nfs4_unhash_stid(struct nfs4_stid *s) |
6136d2b4 | 1021 | { |
3abdb607 | 1022 | s->sc_type = 0; |
6136d2b4 BF |
1023 | } |
1024 | ||
34ed9872 | 1025 | /** |
68b18f52 | 1026 | * nfs4_delegation_exists - Discover if this delegation already exists |
34ed9872 AE |
1027 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
1028 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1029 | * | |
1030 | * Return: | |
68b18f52 | 1031 | * On success: true iff an existing delegation is found |
34ed9872 AE |
1032 | */ |
1033 | ||
68b18f52 BF |
1034 | static bool |
1035 | nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) | |
34ed9872 AE |
1036 | { |
1037 | struct nfs4_delegation *searchdp = NULL; | |
1038 | struct nfs4_client *searchclp = NULL; | |
1039 | ||
1040 | lockdep_assert_held(&state_lock); | |
1041 | lockdep_assert_held(&fp->fi_lock); | |
1042 | ||
1043 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { | |
1044 | searchclp = searchdp->dl_stid.sc_client; | |
1045 | if (clp == searchclp) { | |
51d87bc2 | 1046 | return true; |
34ed9872 AE |
1047 | } |
1048 | } | |
51d87bc2 | 1049 | return false; |
34ed9872 AE |
1050 | } |
1051 | ||
1052 | /** | |
1053 | * hash_delegation_locked - Add a delegation to the appropriate lists | |
1054 | * @dp: a pointer to the nfs4_delegation we are adding. | |
1055 | * @fp: a pointer to the nfs4_file we're granting a delegation on | |
1056 | * | |
1057 | * Return: | |
1058 | * On success: NULL if the delegation was successfully hashed. | |
1059 | * | |
1060 | * On error: -EAGAIN if one was previously granted to this | |
1061 | * nfs4_client for this nfs4_file. Delegation is not hashed. | |
1062 | * | |
1063 | */ | |
1064 | ||
1065 | static int | |
931ee56c BH |
1066 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
1067 | { | |
34ed9872 AE |
1068 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
1069 | ||
cdc97505 | 1070 | lockdep_assert_held(&state_lock); |
417c6629 | 1071 | lockdep_assert_held(&fp->fi_lock); |
931ee56c | 1072 | |
68b18f52 BF |
1073 | if (nfs4_delegation_exists(clp, fp)) |
1074 | return -EAGAIN; | |
a15dfcd5 | 1075 | refcount_inc(&dp->dl_stid.sc_count); |
3fb87d13 | 1076 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
931ee56c | 1077 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
34ed9872 AE |
1078 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
1079 | return 0; | |
931ee56c BH |
1080 | } |
1081 | ||
3fcbbd24 | 1082 | static bool |
42690676 | 1083 | unhash_delegation_locked(struct nfs4_delegation *dp) |
1da177e4 | 1084 | { |
11b9164a | 1085 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
02e1215f | 1086 | |
42690676 JL |
1087 | lockdep_assert_held(&state_lock); |
1088 | ||
3fcbbd24 JL |
1089 | if (list_empty(&dp->dl_perfile)) |
1090 | return false; | |
1091 | ||
b0fc29d6 | 1092 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
d55a166c JL |
1093 | /* Ensure that deleg break won't try to requeue it */ |
1094 | ++dp->dl_time; | |
417c6629 | 1095 | spin_lock(&fp->fi_lock); |
931ee56c | 1096 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 1097 | list_del_init(&dp->dl_recall_lru); |
02e1215f JL |
1098 | list_del_init(&dp->dl_perfile); |
1099 | spin_unlock(&fp->fi_lock); | |
3fcbbd24 | 1100 | return true; |
3bd64a5b BF |
1101 | } |
1102 | ||
3bd64a5b BF |
1103 | static void destroy_delegation(struct nfs4_delegation *dp) |
1104 | { | |
3fcbbd24 JL |
1105 | bool unhashed; |
1106 | ||
42690676 | 1107 | spin_lock(&state_lock); |
3fcbbd24 | 1108 | unhashed = unhash_delegation_locked(dp); |
42690676 | 1109 | spin_unlock(&state_lock); |
0af6e690 BF |
1110 | if (unhashed) |
1111 | destroy_unhashed_deleg(dp); | |
3bd64a5b BF |
1112 | } |
1113 | ||
1114 | static void revoke_delegation(struct nfs4_delegation *dp) | |
1115 | { | |
1116 | struct nfs4_client *clp = dp->dl_stid.sc_client; | |
1117 | ||
2d4a532d JL |
1118 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
1119 | ||
0af6e690 | 1120 | if (clp->cl_minorversion) { |
3bd64a5b | 1121 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
0af6e690 | 1122 | refcount_inc(&dp->dl_stid.sc_count); |
2d4a532d JL |
1123 | spin_lock(&clp->cl_lock); |
1124 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); | |
1125 | spin_unlock(&clp->cl_lock); | |
3bd64a5b | 1126 | } |
0af6e690 | 1127 | destroy_unhashed_deleg(dp); |
3bd64a5b BF |
1128 | } |
1129 | ||
1da177e4 LT |
1130 | /* |
1131 | * SETCLIENTID state | |
1132 | */ | |
1133 | ||
ddc04c41 BF |
1134 | static unsigned int clientid_hashval(u32 id) |
1135 | { | |
1136 | return id & CLIENT_HASH_MASK; | |
1137 | } | |
1138 | ||
6b189105 | 1139 | static unsigned int clientstr_hashval(struct xdr_netobj name) |
ddc04c41 | 1140 | { |
6b189105 | 1141 | return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; |
ddc04c41 BF |
1142 | } |
1143 | ||
f9d7562f BF |
1144 | /* |
1145 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1146 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1147 | * only what share bits are currently in force, but also what | |
1148 | * combinations of share bits previous opens have used. This allows us | |
1149 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1150 | * return an error if the client attempt to downgrade to a combination | |
1151 | * of share bits not explicable by closing some of its previous opens. | |
1152 | * | |
1153 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1154 | * track of access/deny bit combinations; so, e.g., we allow: | |
1155 | * | |
1156 | * OPEN allow read, deny write | |
1157 | * OPEN allow both, deny none | |
1158 | * DOWNGRADE allow read, deny none | |
1159 | * | |
1160 | * which we should reject. | |
1161 | */ | |
5ae037e5 JL |
1162 | static unsigned int |
1163 | bmap_to_share_mode(unsigned long bmap) { | |
f9d7562f | 1164 | int i; |
5ae037e5 | 1165 | unsigned int access = 0; |
f9d7562f | 1166 | |
f9d7562f BF |
1167 | for (i = 1; i < 4; i++) { |
1168 | if (test_bit(i, &bmap)) | |
5ae037e5 | 1169 | access |= i; |
f9d7562f | 1170 | } |
5ae037e5 | 1171 | return access; |
f9d7562f BF |
1172 | } |
1173 | ||
82c5ff1b JL |
1174 | /* set share access for a given stateid */ |
1175 | static inline void | |
1176 | set_access(u32 access, struct nfs4_ol_stateid *stp) | |
1177 | { | |
c11c591f JL |
1178 | unsigned char mask = 1 << access; |
1179 | ||
1180 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1181 | stp->st_access_bmap |= mask; | |
82c5ff1b JL |
1182 | } |
1183 | ||
1184 | /* clear share access for a given stateid */ | |
1185 | static inline void | |
1186 | clear_access(u32 access, struct nfs4_ol_stateid *stp) | |
1187 | { | |
c11c591f JL |
1188 | unsigned char mask = 1 << access; |
1189 | ||
1190 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); | |
1191 | stp->st_access_bmap &= ~mask; | |
82c5ff1b JL |
1192 | } |
1193 | ||
1194 | /* test whether a given stateid has access */ | |
1195 | static inline bool | |
1196 | test_access(u32 access, struct nfs4_ol_stateid *stp) | |
1197 | { | |
c11c591f JL |
1198 | unsigned char mask = 1 << access; |
1199 | ||
1200 | return (bool)(stp->st_access_bmap & mask); | |
82c5ff1b JL |
1201 | } |
1202 | ||
ce0fc43c JL |
1203 | /* set share deny for a given stateid */ |
1204 | static inline void | |
c11c591f | 1205 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1206 | { |
c11c591f JL |
1207 | unsigned char mask = 1 << deny; |
1208 | ||
1209 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1210 | stp->st_deny_bmap |= mask; | |
ce0fc43c JL |
1211 | } |
1212 | ||
1213 | /* clear share deny for a given stateid */ | |
1214 | static inline void | |
c11c591f | 1215 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1216 | { |
c11c591f JL |
1217 | unsigned char mask = 1 << deny; |
1218 | ||
1219 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); | |
1220 | stp->st_deny_bmap &= ~mask; | |
ce0fc43c JL |
1221 | } |
1222 | ||
1223 | /* test whether a given stateid is denying specific access */ | |
1224 | static inline bool | |
c11c591f | 1225 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
ce0fc43c | 1226 | { |
c11c591f JL |
1227 | unsigned char mask = 1 << deny; |
1228 | ||
1229 | return (bool)(stp->st_deny_bmap & mask); | |
f9d7562f BF |
1230 | } |
1231 | ||
1232 | static int nfs4_access_to_omode(u32 access) | |
1233 | { | |
8f34a430 | 1234 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
1235 | case NFS4_SHARE_ACCESS_READ: |
1236 | return O_RDONLY; | |
1237 | case NFS4_SHARE_ACCESS_WRITE: | |
1238 | return O_WRONLY; | |
1239 | case NFS4_SHARE_ACCESS_BOTH: | |
1240 | return O_RDWR; | |
1241 | } | |
063b0fb9 BF |
1242 | WARN_ON_ONCE(1); |
1243 | return O_RDONLY; | |
f9d7562f BF |
1244 | } |
1245 | ||
baeb4ff0 JL |
1246 | /* |
1247 | * A stateid that had a deny mode associated with it is being released | |
1248 | * or downgraded. Recalculate the deny mode on the file. | |
1249 | */ | |
1250 | static void | |
1251 | recalculate_deny_mode(struct nfs4_file *fp) | |
1252 | { | |
1253 | struct nfs4_ol_stateid *stp; | |
1254 | ||
1255 | spin_lock(&fp->fi_lock); | |
1256 | fp->fi_share_deny = 0; | |
1257 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) | |
1258 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); | |
1259 | spin_unlock(&fp->fi_lock); | |
1260 | } | |
1261 | ||
1262 | static void | |
1263 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) | |
1264 | { | |
1265 | int i; | |
1266 | bool change = false; | |
1267 | ||
1268 | for (i = 1; i < 4; i++) { | |
1269 | if ((i & deny) != i) { | |
1270 | change = true; | |
1271 | clear_deny(i, stp); | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | /* Recalculate per-file deny mode if there was a change */ | |
1276 | if (change) | |
11b9164a | 1277 | recalculate_deny_mode(stp->st_stid.sc_file); |
baeb4ff0 JL |
1278 | } |
1279 | ||
82c5ff1b JL |
1280 | /* release all access and file references for a given stateid */ |
1281 | static void | |
1282 | release_all_access(struct nfs4_ol_stateid *stp) | |
1283 | { | |
1284 | int i; | |
11b9164a | 1285 | struct nfs4_file *fp = stp->st_stid.sc_file; |
baeb4ff0 JL |
1286 | |
1287 | if (fp && stp->st_deny_bmap != 0) | |
1288 | recalculate_deny_mode(fp); | |
82c5ff1b JL |
1289 | |
1290 | for (i = 1; i < 4; i++) { | |
1291 | if (test_access(i, stp)) | |
11b9164a | 1292 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
82c5ff1b JL |
1293 | clear_access(i, stp); |
1294 | } | |
1295 | } | |
1296 | ||
d50ffded KM |
1297 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
1298 | { | |
1299 | kfree(sop->so_owner.data); | |
1300 | sop->so_ops->so_free(sop); | |
1301 | } | |
1302 | ||
6b180f0b JL |
1303 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
1304 | { | |
a819ecc1 JL |
1305 | struct nfs4_client *clp = sop->so_client; |
1306 | ||
1307 | might_lock(&clp->cl_lock); | |
1308 | ||
1309 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) | |
6b180f0b | 1310 | return; |
8f4b54c5 | 1311 | sop->so_ops->so_unhash(sop); |
a819ecc1 | 1312 | spin_unlock(&clp->cl_lock); |
d50ffded | 1313 | nfs4_free_stateowner(sop); |
6b180f0b JL |
1314 | } |
1315 | ||
a451b123 TM |
1316 | static bool |
1317 | nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) | |
1318 | { | |
1319 | return list_empty(&stp->st_perfile); | |
1320 | } | |
1321 | ||
e8568739 | 1322 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
529d7b2a | 1323 | { |
11b9164a | 1324 | struct nfs4_file *fp = stp->st_stid.sc_file; |
1d31a253 | 1325 | |
1c755dc1 JL |
1326 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
1327 | ||
e8568739 JL |
1328 | if (list_empty(&stp->st_perfile)) |
1329 | return false; | |
1330 | ||
1d31a253 | 1331 | spin_lock(&fp->fi_lock); |
e8568739 | 1332 | list_del_init(&stp->st_perfile); |
1d31a253 | 1333 | spin_unlock(&fp->fi_lock); |
529d7b2a | 1334 | list_del(&stp->st_perstateowner); |
e8568739 | 1335 | return true; |
529d7b2a BF |
1336 | } |
1337 | ||
6011695d | 1338 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
529d7b2a | 1339 | { |
6011695d | 1340 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
4665e2ba | 1341 | |
8287f009 | 1342 | put_clnt_odstate(stp->st_clnt_odstate); |
6011695d | 1343 | release_all_access(stp); |
d3134b10 JL |
1344 | if (stp->st_stateowner) |
1345 | nfs4_put_stateowner(stp->st_stateowner); | |
6011695d | 1346 | kmem_cache_free(stateid_slab, stid); |
529d7b2a BF |
1347 | } |
1348 | ||
b49e084d | 1349 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
529d7b2a | 1350 | { |
b49e084d JL |
1351 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
1352 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); | |
eb82dd39 | 1353 | struct nfsd_file *nf; |
529d7b2a | 1354 | |
eb82dd39 JL |
1355 | nf = find_any_file(stp->st_stid.sc_file); |
1356 | if (nf) { | |
1357 | get_file(nf->nf_file); | |
1358 | filp_close(nf->nf_file, (fl_owner_t)lo); | |
1359 | nfsd_file_put(nf); | |
1360 | } | |
b49e084d JL |
1361 | nfs4_free_ol_stateid(stid); |
1362 | } | |
1363 | ||
2c41beb0 JL |
1364 | /* |
1365 | * Put the persistent reference to an already unhashed generic stateid, while | |
1366 | * holding the cl_lock. If it's the last reference, then put it onto the | |
1367 | * reaplist for later destruction. | |
1368 | */ | |
1369 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, | |
1370 | struct list_head *reaplist) | |
1371 | { | |
1372 | struct nfs4_stid *s = &stp->st_stid; | |
1373 | struct nfs4_client *clp = s->sc_client; | |
1374 | ||
1375 | lockdep_assert_held(&clp->cl_lock); | |
1376 | ||
1377 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); | |
1378 | ||
a15dfcd5 | 1379 | if (!refcount_dec_and_test(&s->sc_count)) { |
2c41beb0 JL |
1380 | wake_up_all(&close_wq); |
1381 | return; | |
1382 | } | |
1383 | ||
1384 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); | |
1385 | list_add(&stp->st_locks, reaplist); | |
1386 | } | |
1387 | ||
e8568739 | 1388 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
b49e084d | 1389 | { |
f46c445b | 1390 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
3c1c995c | 1391 | |
a451b123 TM |
1392 | if (!unhash_ol_stateid(stp)) |
1393 | return false; | |
3c1c995c | 1394 | list_del_init(&stp->st_locks); |
cd61c522 | 1395 | nfs4_unhash_stid(&stp->st_stid); |
a451b123 | 1396 | return true; |
3c1c995c JL |
1397 | } |
1398 | ||
1399 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) | |
1400 | { | |
f46c445b | 1401 | struct nfs4_client *clp = stp->st_stid.sc_client; |
e8568739 | 1402 | bool unhashed; |
3c1c995c | 1403 | |
f46c445b | 1404 | spin_lock(&clp->cl_lock); |
e8568739 | 1405 | unhashed = unhash_lock_stateid(stp); |
f46c445b | 1406 | spin_unlock(&clp->cl_lock); |
e8568739 JL |
1407 | if (unhashed) |
1408 | nfs4_put_stid(&stp->st_stid); | |
529d7b2a BF |
1409 | } |
1410 | ||
c58c6610 | 1411 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
8f4b54c5 | 1412 | { |
d4f0489f | 1413 | struct nfs4_client *clp = lo->lo_owner.so_client; |
c58c6610 | 1414 | |
d4f0489f | 1415 | lockdep_assert_held(&clp->cl_lock); |
c58c6610 | 1416 | |
8f4b54c5 JL |
1417 | list_del_init(&lo->lo_owner.so_strhash); |
1418 | } | |
1419 | ||
2c41beb0 JL |
1420 | /* |
1421 | * Free a list of generic stateids that were collected earlier after being | |
1422 | * fully unhashed. | |
1423 | */ | |
1424 | static void | |
1425 | free_ol_stateid_reaplist(struct list_head *reaplist) | |
1426 | { | |
1427 | struct nfs4_ol_stateid *stp; | |
fb94d766 | 1428 | struct nfs4_file *fp; |
2c41beb0 JL |
1429 | |
1430 | might_sleep(); | |
1431 | ||
1432 | while (!list_empty(reaplist)) { | |
1433 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, | |
1434 | st_locks); | |
1435 | list_del(&stp->st_locks); | |
fb94d766 | 1436 | fp = stp->st_stid.sc_file; |
2c41beb0 | 1437 | stp->st_stid.sc_free(&stp->st_stid); |
fb94d766 KM |
1438 | if (fp) |
1439 | put_nfs4_file(fp); | |
2c41beb0 JL |
1440 | } |
1441 | } | |
1442 | ||
d83017f9 JL |
1443 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
1444 | struct list_head *reaplist) | |
3c87b9b7 TM |
1445 | { |
1446 | struct nfs4_ol_stateid *stp; | |
1447 | ||
e8568739 JL |
1448 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
1449 | ||
3c87b9b7 TM |
1450 | while (!list_empty(&open_stp->st_locks)) { |
1451 | stp = list_entry(open_stp->st_locks.next, | |
1452 | struct nfs4_ol_stateid, st_locks); | |
e8568739 | 1453 | WARN_ON(!unhash_lock_stateid(stp)); |
d83017f9 | 1454 | put_ol_stateid_locked(stp, reaplist); |
529d7b2a BF |
1455 | } |
1456 | } | |
1457 | ||
e8568739 | 1458 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
d83017f9 | 1459 | struct list_head *reaplist) |
2283963f | 1460 | { |
2c41beb0 JL |
1461 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
1462 | ||
a451b123 TM |
1463 | if (!unhash_ol_stateid(stp)) |
1464 | return false; | |
d83017f9 | 1465 | release_open_stateid_locks(stp, reaplist); |
a451b123 | 1466 | return true; |
38c387b5 BF |
1467 | } |
1468 | ||
1469 | static void release_open_stateid(struct nfs4_ol_stateid *stp) | |
1470 | { | |
2c41beb0 JL |
1471 | LIST_HEAD(reaplist); |
1472 | ||
1473 | spin_lock(&stp->st_stid.sc_client->cl_lock); | |
e8568739 JL |
1474 | if (unhash_open_stateid(stp, &reaplist)) |
1475 | put_ol_stateid_locked(stp, &reaplist); | |
2c41beb0 JL |
1476 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
1477 | free_ol_stateid_reaplist(&reaplist); | |
2283963f BF |
1478 | } |
1479 | ||
7ffb5880 | 1480 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
f1d110ca | 1481 | { |
d4f0489f | 1482 | struct nfs4_client *clp = oo->oo_owner.so_client; |
7ffb5880 | 1483 | |
d4f0489f | 1484 | lockdep_assert_held(&clp->cl_lock); |
7ffb5880 | 1485 | |
8f4b54c5 JL |
1486 | list_del_init(&oo->oo_owner.so_strhash); |
1487 | list_del_init(&oo->oo_perclient); | |
f1d110ca BF |
1488 | } |
1489 | ||
f7a4d872 BF |
1490 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
1491 | { | |
217526e7 JL |
1492 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
1493 | nfsd_net_id); | |
1494 | struct nfs4_ol_stateid *s; | |
f7a4d872 | 1495 | |
217526e7 JL |
1496 | spin_lock(&nn->client_lock); |
1497 | s = oo->oo_last_closed_stid; | |
f7a4d872 | 1498 | if (s) { |
d3134b10 | 1499 | list_del_init(&oo->oo_close_lru); |
f7a4d872 BF |
1500 | oo->oo_last_closed_stid = NULL; |
1501 | } | |
217526e7 JL |
1502 | spin_unlock(&nn->client_lock); |
1503 | if (s) | |
1504 | nfs4_put_stid(&s->st_stid); | |
f7a4d872 BF |
1505 | } |
1506 | ||
2c41beb0 | 1507 | static void release_openowner(struct nfs4_openowner *oo) |
8f4b54c5 JL |
1508 | { |
1509 | struct nfs4_ol_stateid *stp; | |
d4f0489f | 1510 | struct nfs4_client *clp = oo->oo_owner.so_client; |
2c41beb0 | 1511 | struct list_head reaplist; |
7ffb5880 | 1512 | |
2c41beb0 | 1513 | INIT_LIST_HEAD(&reaplist); |
8f4b54c5 | 1514 | |
2c41beb0 JL |
1515 | spin_lock(&clp->cl_lock); |
1516 | unhash_openowner_locked(oo); | |
8f4b54c5 JL |
1517 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
1518 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
1519 | struct nfs4_ol_stateid, st_perstateowner); | |
e8568739 JL |
1520 | if (unhash_open_stateid(stp, &reaplist)) |
1521 | put_ol_stateid_locked(stp, &reaplist); | |
8f4b54c5 | 1522 | } |
d4f0489f | 1523 | spin_unlock(&clp->cl_lock); |
2c41beb0 | 1524 | free_ol_stateid_reaplist(&reaplist); |
f7a4d872 | 1525 | release_last_closed_stateid(oo); |
6b180f0b | 1526 | nfs4_put_stateowner(&oo->oo_owner); |
f1d110ca BF |
1527 | } |
1528 | ||
5282fd72 ME |
1529 | static inline int |
1530 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
1531 | { | |
1532 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
1533 | ||
1534 | return sid->sequence % SESSION_HASH_SIZE; | |
1535 | } | |
1536 | ||
135dd002 | 1537 | #ifdef CONFIG_SUNRPC_DEBUG |
5282fd72 ME |
1538 | static inline void |
1539 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1540 | { | |
1541 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
1542 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
1543 | } | |
8f199b82 TM |
1544 | #else |
1545 | static inline void | |
1546 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
1547 | { | |
1548 | } | |
1549 | #endif | |
1550 | ||
9411b1d4 BF |
1551 | /* |
1552 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it | |
1553 | * won't be used for replay. | |
1554 | */ | |
1555 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) | |
1556 | { | |
1557 | struct nfs4_stateowner *so = cstate->replay_owner; | |
1558 | ||
1559 | if (nfserr == nfserr_replay_me) | |
1560 | return; | |
1561 | ||
1562 | if (!seqid_mutating_err(ntohl(nfserr))) { | |
58fb12e6 | 1563 | nfsd4_cstate_clear_replay(cstate); |
9411b1d4 BF |
1564 | return; |
1565 | } | |
1566 | if (!so) | |
1567 | return; | |
1568 | if (so->so_is_open_owner) | |
1569 | release_last_closed_stateid(openowner(so)); | |
1570 | so->so_seqid++; | |
1571 | return; | |
1572 | } | |
5282fd72 | 1573 | |
ec6b5d7b AA |
1574 | static void |
1575 | gen_sessionid(struct nfsd4_session *ses) | |
1576 | { | |
1577 | struct nfs4_client *clp = ses->se_client; | |
1578 | struct nfsd4_sessionid *sid; | |
1579 | ||
1580 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
1581 | sid->clientid = clp->cl_clientid; | |
1582 | sid->sequence = current_sessionid++; | |
1583 | sid->reserved = 0; | |
1584 | } | |
1585 | ||
1586 | /* | |
a649637c AA |
1587 | * The protocol defines ca_maxresponssize_cached to include the size of |
1588 | * the rpc header, but all we need to cache is the data starting after | |
1589 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
1590 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
1591 | * value that is the number of bytes in our cache plus a few additional | |
1592 | * bytes. In order to stay on the safe side, and not promise more than | |
1593 | * we can cache, those additional bytes must be the minimum possible: 24 | |
1594 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
1595 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
1596 | * for the SEQUENCE op response: | |
1597 | */ | |
1598 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
1599 | ||
557ce264 AA |
1600 | static void |
1601 | free_session_slots(struct nfsd4_session *ses) | |
1602 | { | |
1603 | int i; | |
1604 | ||
53da6a53 BF |
1605 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
1606 | free_svc_cred(&ses->se_slots[i]->sl_cred); | |
557ce264 | 1607 | kfree(ses->se_slots[i]); |
53da6a53 | 1608 | } |
557ce264 AA |
1609 | } |
1610 | ||
a649637c | 1611 | /* |
efe0cb6d BF |
1612 | * We don't actually need to cache the rpc and session headers, so we |
1613 | * can allocate a little less for each slot: | |
1614 | */ | |
55c760cf | 1615 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
efe0cb6d | 1616 | { |
55c760cf | 1617 | u32 size; |
efe0cb6d | 1618 | |
55c760cf BF |
1619 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
1620 | size = 0; | |
1621 | else | |
1622 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
1623 | return size + sizeof(struct nfsd4_slot); | |
5b6feee9 | 1624 | } |
ec6b5d7b | 1625 | |
5b6feee9 BF |
1626 | /* |
1627 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c | 1628 | * re-negotiate active sessions and reduce their slot usage to make |
42b2aa86 | 1629 | * room for new connections. For now we just fail the create session. |
ec6b5d7b | 1630 | */ |
2030ca56 | 1631 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
ec6b5d7b | 1632 | { |
55c760cf BF |
1633 | u32 slotsize = slot_bytes(ca); |
1634 | u32 num = ca->maxreqs; | |
c54f24e3 | 1635 | unsigned long avail, total_avail; |
2030ca56 | 1636 | unsigned int scale_factor; |
ec6b5d7b | 1637 | |
5b6feee9 | 1638 | spin_lock(&nfsd_drc_lock); |
7f49fd5d N |
1639 | if (nfsd_drc_max_mem > nfsd_drc_mem_used) |
1640 | total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; | |
1641 | else | |
1642 | /* We have handed out more space than we chose in | |
1643 | * set_max_drc() to allow. That isn't really a | |
1644 | * problem as long as that doesn't make us think we | |
1645 | * have lots more due to integer overflow. | |
1646 | */ | |
1647 | total_avail = 0; | |
c54f24e3 | 1648 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); |
de766e57 | 1649 | /* |
2030ca56 | 1650 | * Never use more than a fraction of the remaining memory, |
7f49fd5d | 1651 | * unless it's the only way to give this client a slot. |
2030ca56 N |
1652 | * The chosen fraction is either 1/8 or 1/number of threads, |
1653 | * whichever is smaller. This ensures there are adequate | |
1654 | * slots to support multiple clients per thread. | |
7f49fd5d N |
1655 | * Give the client one slot even if that would require |
1656 | * over-allocation--it is better than failure. | |
de766e57 | 1657 | */ |
2030ca56 N |
1658 | scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); |
1659 | ||
1660 | avail = clamp_t(unsigned long, avail, slotsize, | |
1661 | total_avail/scale_factor); | |
5b6feee9 | 1662 | num = min_t(int, num, avail / slotsize); |
7f49fd5d | 1663 | num = max_t(int, num, 1); |
5b6feee9 BF |
1664 | nfsd_drc_mem_used += num * slotsize; |
1665 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 1666 | |
5b6feee9 BF |
1667 | return num; |
1668 | } | |
ec6b5d7b | 1669 | |
55c760cf | 1670 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
5b6feee9 | 1671 | { |
55c760cf BF |
1672 | int slotsize = slot_bytes(ca); |
1673 | ||
4bd9b0f4 | 1674 | spin_lock(&nfsd_drc_lock); |
55c760cf | 1675 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
4bd9b0f4 | 1676 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 1677 | } |
ec6b5d7b | 1678 | |
60810e54 KM |
1679 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
1680 | struct nfsd4_channel_attrs *battrs) | |
5b6feee9 | 1681 | { |
60810e54 KM |
1682 | int numslots = fattrs->maxreqs; |
1683 | int slotsize = slot_bytes(fattrs); | |
5b6feee9 BF |
1684 | struct nfsd4_session *new; |
1685 | int mem, i; | |
a649637c | 1686 | |
5b6feee9 BF |
1687 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
1688 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
1689 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 1690 | |
5b6feee9 BF |
1691 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
1692 | if (!new) | |
1693 | return NULL; | |
557ce264 | 1694 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 | 1695 | for (i = 0; i < numslots; i++) { |
55c760cf | 1696 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
5b6feee9 | 1697 | if (!new->se_slots[i]) |
557ce264 | 1698 | goto out_free; |
557ce264 | 1699 | } |
60810e54 KM |
1700 | |
1701 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); | |
1702 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); | |
1703 | ||
5b6feee9 BF |
1704 | return new; |
1705 | out_free: | |
1706 | while (i--) | |
1707 | kfree(new->se_slots[i]); | |
1708 | kfree(new); | |
1709 | return NULL; | |
ec6b5d7b AA |
1710 | } |
1711 | ||
19cf5c02 BF |
1712 | static void free_conn(struct nfsd4_conn *c) |
1713 | { | |
1714 | svc_xprt_put(c->cn_xprt); | |
1715 | kfree(c); | |
1716 | } | |
ec6b5d7b | 1717 | |
19cf5c02 BF |
1718 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
1719 | { | |
1720 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
1721 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 1722 | |
19cf5c02 BF |
1723 | spin_lock(&clp->cl_lock); |
1724 | if (!list_empty(&c->cn_persession)) { | |
1725 | list_del(&c->cn_persession); | |
1726 | free_conn(c); | |
1727 | } | |
eea49806 | 1728 | nfsd4_probe_callback(clp); |
2e4b7239 | 1729 | spin_unlock(&clp->cl_lock); |
19cf5c02 | 1730 | } |
ec6b5d7b | 1731 | |
d29c374c | 1732 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 1733 | { |
c7662518 | 1734 | struct nfsd4_conn *conn; |
ec6b5d7b | 1735 | |
c7662518 BF |
1736 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
1737 | if (!conn) | |
db90681d | 1738 | return NULL; |
c7662518 BF |
1739 | svc_xprt_get(rqstp->rq_xprt); |
1740 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 1741 | conn->cn_flags = flags; |
db90681d BF |
1742 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
1743 | return conn; | |
1744 | } | |
a649637c | 1745 | |
328ead28 BF |
1746 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
1747 | { | |
1748 | conn->cn_session = ses; | |
1749 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
1750 | } |
1751 | ||
db90681d | 1752 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 1753 | { |
db90681d | 1754 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 1755 | |
c7662518 | 1756 | spin_lock(&clp->cl_lock); |
328ead28 | 1757 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 1758 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
1759 | } |
1760 | ||
21b75b01 | 1761 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 1762 | { |
19cf5c02 | 1763 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 1764 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
1765 | } |
1766 | ||
e1ff371f | 1767 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
ec6b5d7b | 1768 | { |
21b75b01 | 1769 | int ret; |
ec6b5d7b | 1770 | |
db90681d | 1771 | nfsd4_hash_conn(conn, ses); |
21b75b01 BF |
1772 | ret = nfsd4_register_conn(conn); |
1773 | if (ret) | |
1774 | /* oops; xprt is already down: */ | |
1775 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
57a37144 BF |
1776 | /* We may have gained or lost a callback channel: */ |
1777 | nfsd4_probe_callback_sync(ses->se_client); | |
c7662518 | 1778 | } |
ec6b5d7b | 1779 | |
e1ff371f | 1780 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
1d1bc8f2 BF |
1781 | { |
1782 | u32 dir = NFS4_CDFC4_FORE; | |
1783 | ||
e1ff371f | 1784 | if (cses->flags & SESSION4_BACK_CHAN) |
1d1bc8f2 | 1785 | dir |= NFS4_CDFC4_BACK; |
e1ff371f | 1786 | return alloc_conn(rqstp, dir); |
1d1bc8f2 BF |
1787 | } |
1788 | ||
1789 | /* must be called under client_lock */ | |
19cf5c02 | 1790 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 1791 | { |
19cf5c02 BF |
1792 | struct nfs4_client *clp = s->se_client; |
1793 | struct nfsd4_conn *c; | |
ec6b5d7b | 1794 | |
19cf5c02 BF |
1795 | spin_lock(&clp->cl_lock); |
1796 | while (!list_empty(&s->se_conns)) { | |
1797 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
1798 | list_del_init(&c->cn_persession); | |
1799 | spin_unlock(&clp->cl_lock); | |
557ce264 | 1800 | |
19cf5c02 BF |
1801 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
1802 | free_conn(c); | |
ec6b5d7b | 1803 | |
19cf5c02 BF |
1804 | spin_lock(&clp->cl_lock); |
1805 | } | |
1806 | spin_unlock(&clp->cl_lock); | |
c7662518 | 1807 | } |
ec6b5d7b | 1808 | |
1377b69e BF |
1809 | static void __free_session(struct nfsd4_session *ses) |
1810 | { | |
1377b69e BF |
1811 | free_session_slots(ses); |
1812 | kfree(ses); | |
1813 | } | |
1814 | ||
66b2b9b2 | 1815 | static void free_session(struct nfsd4_session *ses) |
c7662518 | 1816 | { |
19cf5c02 | 1817 | nfsd4_del_conns(ses); |
55c760cf | 1818 | nfsd4_put_drc_mem(&ses->se_fchannel); |
1377b69e | 1819 | __free_session(ses); |
c7662518 BF |
1820 | } |
1821 | ||
135ae827 | 1822 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
a827bcb2 | 1823 | { |
a827bcb2 | 1824 | int idx; |
1872de0e | 1825 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
a827bcb2 | 1826 | |
ec6b5d7b AA |
1827 | new->se_client = clp; |
1828 | gen_sessionid(new); | |
ec6b5d7b | 1829 | |
c7662518 BF |
1830 | INIT_LIST_HEAD(&new->se_conns); |
1831 | ||
ac7c46f2 | 1832 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 1833 | new->se_flags = cses->flags; |
8b5ce5cd | 1834 | new->se_cb_prog = cses->callback_prog; |
c6bb3ca2 | 1835 | new->se_cb_sec = cses->cb_sec; |
66b2b9b2 | 1836 | atomic_set(&new->se_ref, 0); |
5b6feee9 | 1837 | idx = hash_sessionid(&new->se_sessionid); |
1872de0e | 1838 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
4c649378 | 1839 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 1840 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 1841 | spin_unlock(&clp->cl_lock); |
60810e54 | 1842 | |
b0d2e42c | 1843 | { |
edd76786 | 1844 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
1845 | /* |
1846 | * This is a little silly; with sessions there's no real | |
1847 | * use for the callback address. Use the peer address | |
1848 | * as a reasonable default for now, but consider fixing | |
1849 | * the rpc client not to require an address in the | |
1850 | * future: | |
1851 | */ | |
edd76786 BF |
1852 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
1853 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 1854 | } |
ec6b5d7b AA |
1855 | } |
1856 | ||
9089f1b4 | 1857 | /* caller must hold client_lock */ |
5282fd72 | 1858 | static struct nfsd4_session * |
d4e19e70 | 1859 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
5282fd72 ME |
1860 | { |
1861 | struct nfsd4_session *elem; | |
1862 | int idx; | |
1872de0e | 1863 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5282fd72 | 1864 | |
0a880a28 TM |
1865 | lockdep_assert_held(&nn->client_lock); |
1866 | ||
5282fd72 ME |
1867 | dump_sessionid(__func__, sessionid); |
1868 | idx = hash_sessionid(sessionid); | |
5282fd72 | 1869 | /* Search in the appropriate list */ |
1872de0e | 1870 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
5282fd72 ME |
1871 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
1872 | NFS4_MAX_SESSIONID_LEN)) { | |
1873 | return elem; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | dprintk("%s: session not found\n", __func__); | |
1878 | return NULL; | |
1879 | } | |
1880 | ||
d4e19e70 TM |
1881 | static struct nfsd4_session * |
1882 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, | |
1883 | __be32 *ret) | |
1884 | { | |
1885 | struct nfsd4_session *session; | |
1886 | __be32 status = nfserr_badsession; | |
1887 | ||
1888 | session = __find_in_sessionid_hashtbl(sessionid, net); | |
1889 | if (!session) | |
1890 | goto out; | |
1891 | status = nfsd4_get_session_locked(session); | |
1892 | if (status) | |
1893 | session = NULL; | |
1894 | out: | |
1895 | *ret = status; | |
1896 | return session; | |
1897 | } | |
1898 | ||
9089f1b4 | 1899 | /* caller must hold client_lock */ |
7116ed6b | 1900 | static void |
5282fd72 | 1901 | unhash_session(struct nfsd4_session *ses) |
7116ed6b | 1902 | { |
0a880a28 TM |
1903 | struct nfs4_client *clp = ses->se_client; |
1904 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1905 | ||
1906 | lockdep_assert_held(&nn->client_lock); | |
1907 | ||
7116ed6b | 1908 | list_del(&ses->se_hash); |
4c649378 | 1909 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 1910 | list_del(&ses->se_perclnt); |
4c649378 | 1911 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
1912 | } |
1913 | ||
1da177e4 LT |
1914 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
1915 | static int | |
2c142baa | 1916 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
1da177e4 | 1917 | { |
bbc7f33a BF |
1918 | /* |
1919 | * We're assuming the clid was not given out from a boot | |
1920 | * precisely 2^32 (about 136 years) before this one. That seems | |
1921 | * a safe assumption: | |
1922 | */ | |
1923 | if (clid->cl_boot == (u32)nn->boot_time) | |
1da177e4 | 1924 | return 0; |
9cc76801 | 1925 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08llx\n", |
2c142baa | 1926 | clid->cl_boot, clid->cl_id, nn->boot_time); |
1da177e4 LT |
1927 | return 1; |
1928 | } | |
1929 | ||
1930 | /* | |
1931 | * XXX Should we use a slab cache ? | |
1932 | * This type of memory management is somewhat inefficient, but we use it | |
1933 | * anyway since SETCLIENTID is not a common operation. | |
1934 | */ | |
35bba9a3 | 1935 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
1936 | { |
1937 | struct nfs4_client *clp; | |
d4f0489f | 1938 | int i; |
1da177e4 | 1939 | |
9258a2d5 | 1940 | clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); |
35bba9a3 BF |
1941 | if (clp == NULL) |
1942 | return NULL; | |
6f4859b8 | 1943 | xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); |
d4f0489f TM |
1944 | if (clp->cl_name.data == NULL) |
1945 | goto err_no_name; | |
6da2ec56 KC |
1946 | clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, |
1947 | sizeof(struct list_head), | |
1948 | GFP_KERNEL); | |
d4f0489f TM |
1949 | if (!clp->cl_ownerstr_hashtbl) |
1950 | goto err_no_hashtbl; | |
1951 | for (i = 0; i < OWNER_HASH_SIZE; i++) | |
1952 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); | |
5694c93e TM |
1953 | INIT_LIST_HEAD(&clp->cl_sessions); |
1954 | idr_init(&clp->cl_stateids); | |
14ed14cc | 1955 | atomic_set(&clp->cl_rpc_users, 0); |
5694c93e TM |
1956 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
1957 | INIT_LIST_HEAD(&clp->cl_idhash); | |
1958 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1959 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1960 | INIT_LIST_HEAD(&clp->cl_lru); | |
5694c93e | 1961 | INIT_LIST_HEAD(&clp->cl_revoked); |
9cf514cc CH |
1962 | #ifdef CONFIG_NFSD_PNFS |
1963 | INIT_LIST_HEAD(&clp->cl_lo_states); | |
1964 | #endif | |
e0639dc5 OK |
1965 | INIT_LIST_HEAD(&clp->async_copies); |
1966 | spin_lock_init(&clp->async_lock); | |
5694c93e TM |
1967 | spin_lock_init(&clp->cl_lock); |
1968 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1da177e4 | 1969 | return clp; |
d4f0489f TM |
1970 | err_no_hashtbl: |
1971 | kfree(clp->cl_name.data); | |
1972 | err_no_name: | |
9258a2d5 | 1973 | kmem_cache_free(client_slab, clp); |
d4f0489f | 1974 | return NULL; |
1da177e4 LT |
1975 | } |
1976 | ||
59f8e91b BF |
1977 | static void __free_client(struct kref *k) |
1978 | { | |
e8a79fb1 BF |
1979 | struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); |
1980 | struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); | |
59f8e91b BF |
1981 | |
1982 | free_svc_cred(&clp->cl_cred); | |
1983 | kfree(clp->cl_ownerstr_hashtbl); | |
1984 | kfree(clp->cl_name.data); | |
79123444 BF |
1985 | kfree(clp->cl_nii_domain.data); |
1986 | kfree(clp->cl_nii_name.data); | |
59f8e91b | 1987 | idr_destroy(&clp->cl_stateids); |
59f8e91b BF |
1988 | kmem_cache_free(client_slab, clp); |
1989 | } | |
1990 | ||
297e57a2 | 1991 | static void drop_client(struct nfs4_client *clp) |
59f8e91b | 1992 | { |
e8a79fb1 | 1993 | kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); |
59f8e91b BF |
1994 | } |
1995 | ||
4dd86e15 | 1996 | static void |
1da177e4 LT |
1997 | free_client(struct nfs4_client *clp) |
1998 | { | |
792c95dd BF |
1999 | while (!list_empty(&clp->cl_sessions)) { |
2000 | struct nfsd4_session *ses; | |
2001 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
2002 | se_perclnt); | |
2003 | list_del(&ses->se_perclnt); | |
66b2b9b2 BF |
2004 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
2005 | free_session(ses); | |
792c95dd | 2006 | } |
4cb57e30 | 2007 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
89c905be | 2008 | if (clp->cl_nfsd_dentry) { |
e8a79fb1 | 2009 | nfsd_client_rmdir(clp->cl_nfsd_dentry); |
89c905be BF |
2010 | clp->cl_nfsd_dentry = NULL; |
2011 | wake_up_all(&expiry_wq); | |
2012 | } | |
59f8e91b | 2013 | drop_client(clp); |
1da177e4 LT |
2014 | } |
2015 | ||
84d38ac9 | 2016 | /* must be called under the client_lock */ |
4beb345b | 2017 | static void |
84d38ac9 BH |
2018 | unhash_client_locked(struct nfs4_client *clp) |
2019 | { | |
4beb345b | 2020 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
792c95dd BF |
2021 | struct nfsd4_session *ses; |
2022 | ||
0a880a28 TM |
2023 | lockdep_assert_held(&nn->client_lock); |
2024 | ||
4beb345b TM |
2025 | /* Mark the client as expired! */ |
2026 | clp->cl_time = 0; | |
2027 | /* Make it invisible */ | |
2028 | if (!list_empty(&clp->cl_idhash)) { | |
2029 | list_del_init(&clp->cl_idhash); | |
2030 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) | |
2031 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); | |
2032 | else | |
2033 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); | |
2034 | } | |
2035 | list_del_init(&clp->cl_lru); | |
4c649378 | 2036 | spin_lock(&clp->cl_lock); |
792c95dd BF |
2037 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
2038 | list_del_init(&ses->se_hash); | |
4c649378 | 2039 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
2040 | } |
2041 | ||
1da177e4 | 2042 | static void |
4beb345b TM |
2043 | unhash_client(struct nfs4_client *clp) |
2044 | { | |
2045 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2046 | ||
2047 | spin_lock(&nn->client_lock); | |
2048 | unhash_client_locked(clp); | |
2049 | spin_unlock(&nn->client_lock); | |
2050 | } | |
2051 | ||
97403d95 JL |
2052 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
2053 | { | |
14ed14cc | 2054 | if (atomic_read(&clp->cl_rpc_users)) |
97403d95 JL |
2055 | return nfserr_jukebox; |
2056 | unhash_client_locked(clp); | |
2057 | return nfs_ok; | |
2058 | } | |
2059 | ||
4beb345b TM |
2060 | static void |
2061 | __destroy_client(struct nfs4_client *clp) | |
1da177e4 | 2062 | { |
68ef3bc3 | 2063 | int i; |
fe0750e5 | 2064 | struct nfs4_openowner *oo; |
1da177e4 | 2065 | struct nfs4_delegation *dp; |
1da177e4 LT |
2066 | struct list_head reaplist; |
2067 | ||
1da177e4 | 2068 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 2069 | spin_lock(&state_lock); |
ea1da636 N |
2070 | while (!list_empty(&clp->cl_delegations)) { |
2071 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
3fcbbd24 | 2072 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 2073 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 2074 | } |
cdc97505 | 2075 | spin_unlock(&state_lock); |
1da177e4 LT |
2076 | while (!list_empty(&reaplist)) { |
2077 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 2078 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 2079 | destroy_unhashed_deleg(dp); |
1da177e4 | 2080 | } |
2d4a532d | 2081 | while (!list_empty(&clp->cl_revoked)) { |
c876486b | 2082 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
2d4a532d | 2083 | list_del_init(&dp->dl_recall_lru); |
6011695d | 2084 | nfs4_put_stid(&dp->dl_stid); |
956c4fee | 2085 | } |
ea1da636 | 2086 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 | 2087 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
b5971afa | 2088 | nfs4_get_stateowner(&oo->oo_owner); |
fe0750e5 | 2089 | release_openowner(oo); |
1da177e4 | 2090 | } |
68ef3bc3 JL |
2091 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
2092 | struct nfs4_stateowner *so, *tmp; | |
2093 | ||
2094 | list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], | |
2095 | so_strhash) { | |
2096 | /* Should be no openowners at this point */ | |
2097 | WARN_ON_ONCE(so->so_is_open_owner); | |
2098 | remove_blocked_locks(lockowner(so)); | |
2099 | } | |
2100 | } | |
9cf514cc | 2101 | nfsd4_return_all_client_layouts(clp); |
e0639dc5 | 2102 | nfsd4_shutdown_copy(clp); |
6ff8da08 | 2103 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
2104 | if (clp->cl_cb_conn.cb_xprt) |
2105 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
221a6876 | 2106 | free_client(clp); |
89c905be | 2107 | wake_up_all(&expiry_wq); |
1da177e4 LT |
2108 | } |
2109 | ||
4beb345b TM |
2110 | static void |
2111 | destroy_client(struct nfs4_client *clp) | |
2112 | { | |
2113 | unhash_client(clp); | |
2114 | __destroy_client(clp); | |
2115 | } | |
2116 | ||
362063a5 SM |
2117 | static void inc_reclaim_complete(struct nfs4_client *clp) |
2118 | { | |
2119 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2120 | ||
2121 | if (!nn->track_reclaim_completes) | |
2122 | return; | |
2123 | if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) | |
2124 | return; | |
2125 | if (atomic_inc_return(&nn->nr_reclaim_complete) == | |
2126 | nn->reclaim_str_hashtbl_size) { | |
2127 | printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", | |
2128 | clp->net->ns.inum); | |
2129 | nfsd4_end_grace(nn); | |
2130 | } | |
2131 | } | |
2132 | ||
0d22f68f BF |
2133 | static void expire_client(struct nfs4_client *clp) |
2134 | { | |
4beb345b | 2135 | unhash_client(clp); |
0d22f68f | 2136 | nfsd4_client_record_remove(clp); |
4beb345b | 2137 | __destroy_client(clp); |
0d22f68f BF |
2138 | } |
2139 | ||
35bba9a3 BF |
2140 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
2141 | { | |
2142 | memcpy(target->cl_verifier.data, source->data, | |
2143 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
2144 | } |
2145 | ||
35bba9a3 BF |
2146 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
2147 | { | |
1da177e4 LT |
2148 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
2149 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
2150 | } | |
2151 | ||
50043859 BF |
2152 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
2153 | { | |
2f10fdcb N |
2154 | target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); |
2155 | target->cr_raw_principal = kstrdup(source->cr_raw_principal, | |
2156 | GFP_KERNEL); | |
9abdda5d CL |
2157 | target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); |
2158 | if ((source->cr_principal && !target->cr_principal) || | |
2159 | (source->cr_raw_principal && !target->cr_raw_principal) || | |
2160 | (source->cr_targ_princ && !target->cr_targ_princ)) | |
2f10fdcb | 2161 | return -ENOMEM; |
50043859 | 2162 | |
d5497fc6 | 2163 | target->cr_flavor = source->cr_flavor; |
1da177e4 LT |
2164 | target->cr_uid = source->cr_uid; |
2165 | target->cr_gid = source->cr_gid; | |
2166 | target->cr_group_info = source->cr_group_info; | |
2167 | get_group_info(target->cr_group_info); | |
0dc1531a BF |
2168 | target->cr_gss_mech = source->cr_gss_mech; |
2169 | if (source->cr_gss_mech) | |
2170 | gss_mech_get(source->cr_gss_mech); | |
03a4e1f6 | 2171 | return 0; |
1da177e4 LT |
2172 | } |
2173 | ||
ef17af2a | 2174 | static int |
ac55fdc4 JL |
2175 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
2176 | { | |
ef17af2a RV |
2177 | if (o1->len < o2->len) |
2178 | return -1; | |
2179 | if (o1->len > o2->len) | |
2180 | return 1; | |
2181 | return memcmp(o1->data, o2->data, o1->len); | |
ac55fdc4 JL |
2182 | } |
2183 | ||
1da177e4 | 2184 | static int |
599e0a22 BF |
2185 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
2186 | { | |
2187 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
2188 | } |
2189 | ||
2190 | static int | |
599e0a22 BF |
2191 | same_clid(clientid_t *cl1, clientid_t *cl2) |
2192 | { | |
2193 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
2194 | } |
2195 | ||
8fbba96e BF |
2196 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
2197 | { | |
2198 | int i; | |
2199 | ||
2200 | if (g1->ngroups != g2->ngroups) | |
2201 | return false; | |
2202 | for (i=0; i<g1->ngroups; i++) | |
81243eac | 2203 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
8fbba96e BF |
2204 | return false; |
2205 | return true; | |
2206 | } | |
2207 | ||
68eb3508 BF |
2208 | /* |
2209 | * RFC 3530 language requires clid_inuse be returned when the | |
2210 | * "principal" associated with a requests differs from that previously | |
2211 | * used. We use uid, gid's, and gss principal string as our best | |
2212 | * approximation. We also don't want to allow non-gss use of a client | |
2213 | * established using gss: in theory cr_principal should catch that | |
2214 | * change, but in practice cr_principal can be null even in the gss case | |
2215 | * since gssd doesn't always pass down a principal string. | |
2216 | */ | |
2217 | static bool is_gss_cred(struct svc_cred *cr) | |
2218 | { | |
2219 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ | |
2220 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); | |
2221 | } | |
2222 | ||
2223 | ||
5559b50a | 2224 | static bool |
599e0a22 BF |
2225 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
2226 | { | |
68eb3508 | 2227 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
6fab8779 EB |
2228 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
2229 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) | |
8fbba96e BF |
2230 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
2231 | return false; | |
9abdda5d | 2232 | /* XXX: check that cr_targ_princ fields match ? */ |
8fbba96e BF |
2233 | if (cr1->cr_principal == cr2->cr_principal) |
2234 | return true; | |
2235 | if (!cr1->cr_principal || !cr2->cr_principal) | |
2236 | return false; | |
5559b50a | 2237 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
1da177e4 LT |
2238 | } |
2239 | ||
57266a6e BF |
2240 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
2241 | { | |
2242 | struct svc_cred *cr = &rqstp->rq_cred; | |
2243 | u32 service; | |
2244 | ||
c4720591 BF |
2245 | if (!cr->cr_gss_mech) |
2246 | return false; | |
57266a6e BF |
2247 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
2248 | return service == RPC_GSS_SVC_INTEGRITY || | |
2249 | service == RPC_GSS_SVC_PRIVACY; | |
2250 | } | |
2251 | ||
dedeb13f | 2252 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
57266a6e BF |
2253 | { |
2254 | struct svc_cred *cr = &rqstp->rq_cred; | |
2255 | ||
2256 | if (!cl->cl_mach_cred) | |
2257 | return true; | |
2258 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) | |
2259 | return false; | |
2260 | if (!svc_rqst_integrity_protected(rqstp)) | |
2261 | return false; | |
414ca017 BF |
2262 | if (cl->cl_cred.cr_raw_principal) |
2263 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, | |
2264 | cr->cr_raw_principal); | |
57266a6e BF |
2265 | if (!cr->cr_principal) |
2266 | return false; | |
2267 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); | |
2268 | } | |
2269 | ||
294ac32e | 2270 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
deda2faa | 2271 | { |
ab4684d1 | 2272 | __be32 verf[2]; |
1da177e4 | 2273 | |
f419992c JL |
2274 | /* |
2275 | * This is opaque to client, so no need to byte-swap. Use | |
2276 | * __force to keep sparse happy | |
2277 | */ | |
9104ae49 | 2278 | verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); |
19311aa8 | 2279 | verf[1] = (__force __be32)nn->clverifier_counter++; |
ab4684d1 | 2280 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
1da177e4 LT |
2281 | } |
2282 | ||
294ac32e JL |
2283 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
2284 | { | |
9cc76801 | 2285 | clp->cl_clientid.cl_boot = (u32)nn->boot_time; |
294ac32e JL |
2286 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
2287 | gen_confirm(clp, nn); | |
2288 | } | |
2289 | ||
4770d722 JL |
2290 | static struct nfs4_stid * |
2291 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) | |
4581d140 | 2292 | { |
3abdb607 BF |
2293 | struct nfs4_stid *ret; |
2294 | ||
2295 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); | |
2296 | if (!ret || !ret->sc_type) | |
2297 | return NULL; | |
2298 | return ret; | |
4d71ab87 BF |
2299 | } |
2300 | ||
4770d722 JL |
2301 | static struct nfs4_stid * |
2302 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) | |
f459e453 BF |
2303 | { |
2304 | struct nfs4_stid *s; | |
4d71ab87 | 2305 | |
4770d722 JL |
2306 | spin_lock(&cl->cl_lock); |
2307 | s = find_stateid_locked(cl, t); | |
2d3f9668 TM |
2308 | if (s != NULL) { |
2309 | if (typemask & s->sc_type) | |
a15dfcd5 | 2310 | refcount_inc(&s->sc_count); |
2d3f9668 TM |
2311 | else |
2312 | s = NULL; | |
2313 | } | |
4770d722 JL |
2314 | spin_unlock(&cl->cl_lock); |
2315 | return s; | |
4581d140 BF |
2316 | } |
2317 | ||
a204f25e BF |
2318 | static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) |
2319 | { | |
2320 | struct nfsdfs_client *nc; | |
2321 | nc = get_nfsdfs_client(inode); | |
2322 | if (!nc) | |
2323 | return NULL; | |
2324 | return container_of(nc, struct nfs4_client, cl_nfsdfs); | |
2325 | } | |
2326 | ||
169319f1 BF |
2327 | static void seq_quote_mem(struct seq_file *m, char *data, int len) |
2328 | { | |
2329 | seq_printf(m, "\""); | |
2330 | seq_escape_mem_ascii(m, data, len); | |
2331 | seq_printf(m, "\""); | |
2332 | } | |
2333 | ||
97ad4031 BF |
2334 | static int client_info_show(struct seq_file *m, void *v) |
2335 | { | |
2336 | struct inode *inode = m->private; | |
97ad4031 BF |
2337 | struct nfs4_client *clp; |
2338 | u64 clid; | |
2339 | ||
a204f25e BF |
2340 | clp = get_nfsdfs_clp(inode); |
2341 | if (!clp) | |
97ad4031 | 2342 | return -ENXIO; |
97ad4031 BF |
2343 | memcpy(&clid, &clp->cl_clientid, sizeof(clid)); |
2344 | seq_printf(m, "clientid: 0x%llx\n", clid); | |
169319f1 BF |
2345 | seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); |
2346 | seq_printf(m, "name: "); | |
2347 | seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); | |
2348 | seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); | |
79123444 BF |
2349 | if (clp->cl_nii_domain.data) { |
2350 | seq_printf(m, "Implementation domain: "); | |
2351 | seq_quote_mem(m, clp->cl_nii_domain.data, | |
2352 | clp->cl_nii_domain.len); | |
2353 | seq_printf(m, "\nImplementation name: "); | |
2354 | seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); | |
e29f4703 | 2355 | seq_printf(m, "\nImplementation time: [%lld, %ld]\n", |
79123444 BF |
2356 | clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); |
2357 | } | |
97ad4031 BF |
2358 | drop_client(clp); |
2359 | ||
2360 | return 0; | |
2361 | } | |
2362 | ||
2363 | static int client_info_open(struct inode *inode, struct file *file) | |
2364 | { | |
2365 | return single_open(file, client_info_show, inode); | |
2366 | } | |
2367 | ||
2368 | static const struct file_operations client_info_fops = { | |
2369 | .open = client_info_open, | |
2370 | .read = seq_read, | |
2371 | .llseek = seq_lseek, | |
2372 | .release = single_release, | |
2373 | }; | |
2374 | ||
78599c42 BF |
2375 | static void *states_start(struct seq_file *s, loff_t *pos) |
2376 | __acquires(&clp->cl_lock) | |
2377 | { | |
2378 | struct nfs4_client *clp = s->private; | |
2379 | unsigned long id = *pos; | |
2380 | void *ret; | |
2381 | ||
2382 | spin_lock(&clp->cl_lock); | |
2383 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2384 | *pos = id; | |
2385 | return ret; | |
2386 | } | |
2387 | ||
2388 | static void *states_next(struct seq_file *s, void *v, loff_t *pos) | |
2389 | { | |
2390 | struct nfs4_client *clp = s->private; | |
2391 | unsigned long id = *pos; | |
2392 | void *ret; | |
2393 | ||
2394 | id = *pos; | |
2395 | id++; | |
2396 | ret = idr_get_next_ul(&clp->cl_stateids, &id); | |
2397 | *pos = id; | |
2398 | return ret; | |
2399 | } | |
2400 | ||
2401 | static void states_stop(struct seq_file *s, void *v) | |
2402 | __releases(&clp->cl_lock) | |
2403 | { | |
2404 | struct nfs4_client *clp = s->private; | |
2405 | ||
2406 | spin_unlock(&clp->cl_lock); | |
2407 | } | |
2408 | ||
fd4f83fd | 2409 | static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) |
78599c42 | 2410 | { |
fd4f83fd | 2411 | struct inode *inode = f->nf_inode; |
78599c42 BF |
2412 | |
2413 | seq_printf(s, "superblock: \"%02x:%02x:%ld\"", | |
2414 | MAJOR(inode->i_sb->s_dev), | |
2415 | MINOR(inode->i_sb->s_dev), | |
2416 | inode->i_ino); | |
2417 | } | |
2418 | ||
2419 | static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) | |
2420 | { | |
2421 | seq_printf(s, "owner: "); | |
2422 | seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); | |
2423 | } | |
2424 | ||
2425 | static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) | |
2426 | { | |
2427 | struct nfs4_ol_stateid *ols; | |
2428 | struct nfs4_file *nf; | |
fd4f83fd | 2429 | struct nfsd_file *file; |
78599c42 BF |
2430 | struct nfs4_stateowner *oo; |
2431 | unsigned int access, deny; | |
2432 | ||
2433 | if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID) | |
2434 | return 0; /* XXX: or SEQ_SKIP? */ | |
2435 | ols = openlockstateid(st); | |
2436 | oo = ols->st_stateowner; | |
2437 | nf = st->sc_file; | |
2438 | file = find_any_file(nf); | |
2439 | ||
2440 | seq_printf(s, "- 0x%16phN: { type: open, ", &st->sc_stateid); | |
2441 | ||
2442 | access = bmap_to_share_mode(ols->st_access_bmap); | |
2443 | deny = bmap_to_share_mode(ols->st_deny_bmap); | |
2444 | ||
c4b77edb | 2445 | seq_printf(s, "access: %s%s, ", |
78599c42 BF |
2446 | access & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2447 | access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
c4b77edb | 2448 | seq_printf(s, "deny: %s%s, ", |
78599c42 BF |
2449 | deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", |
2450 | deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); | |
2451 | ||
2452 | nfs4_show_superblock(s, file); | |
2453 | seq_printf(s, ", "); | |
2454 | nfs4_show_owner(s, oo); | |
2455 | seq_printf(s, " }\n"); | |
fd4f83fd | 2456 | nfsd_file_put(file); |
16d36e09 BF |
2457 | |
2458 | return 0; | |
2459 | } | |
2460 | ||
2461 | static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) | |
2462 | { | |
2463 | struct nfs4_ol_stateid *ols; | |
2464 | struct nfs4_file *nf; | |
fd4f83fd | 2465 | struct nfsd_file *file; |
16d36e09 BF |
2466 | struct nfs4_stateowner *oo; |
2467 | ||
2468 | ols = openlockstateid(st); | |
2469 | oo = ols->st_stateowner; | |
2470 | nf = st->sc_file; | |
2471 | file = find_any_file(nf); | |
2472 | ||
2473 | seq_printf(s, "- 0x%16phN: { type: lock, ", &st->sc_stateid); | |
2474 | ||
2475 | /* | |
2476 | * Note: a lock stateid isn't really the same thing as a lock, | |
2477 | * it's the locking state held by one owner on a file, and there | |
2478 | * may be multiple (or no) lock ranges associated with it. | |
2479 | * (Same for the matter is true of open stateids.) | |
2480 | */ | |
78599c42 | 2481 | |
16d36e09 BF |
2482 | nfs4_show_superblock(s, file); |
2483 | /* XXX: open stateid? */ | |
2484 | seq_printf(s, ", "); | |
2485 | nfs4_show_owner(s, oo); | |
2486 | seq_printf(s, " }\n"); | |
fd4f83fd | 2487 | nfsd_file_put(file); |
78599c42 BF |
2488 | |
2489 | return 0; | |
2490 | } | |
2491 | ||
16d36e09 BF |
2492 | static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) |
2493 | { | |
2494 | struct nfs4_delegation *ds; | |
2495 | struct nfs4_file *nf; | |
eb82dd39 | 2496 | struct nfsd_file *file; |
16d36e09 BF |
2497 | |
2498 | ds = delegstateid(st); | |
2499 | nf = st->sc_file; | |
2500 | file = nf->fi_deleg_file; | |
2501 | ||
2502 | seq_printf(s, "- 0x%16phN: { type: deleg, ", &st->sc_stateid); | |
2503 | ||
2504 | /* Kinda dead code as long as we only support read delegs: */ | |
2505 | seq_printf(s, "access: %s, ", | |
2506 | ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); | |
2507 | ||
2508 | /* XXX: lease time, whether it's being recalled. */ | |
2509 | ||
2510 | nfs4_show_superblock(s, file); | |
2511 | seq_printf(s, " }\n"); | |
2512 | ||
2513 | return 0; | |
2514 | } | |
2515 | ||
0c4b62b0 BF |
2516 | static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) |
2517 | { | |
2518 | struct nfs4_layout_stateid *ls; | |
eb82dd39 | 2519 | struct nfsd_file *file; |
0c4b62b0 BF |
2520 | |
2521 | ls = container_of(st, struct nfs4_layout_stateid, ls_stid); | |
2522 | file = ls->ls_file; | |
2523 | ||
2524 | seq_printf(s, "- 0x%16phN: { type: layout, ", &st->sc_stateid); | |
2525 | ||
2526 | /* XXX: What else would be useful? */ | |
2527 | ||
2528 | nfs4_show_superblock(s, file); | |
2529 | seq_printf(s, " }\n"); | |
2530 | ||
2531 | return 0; | |
2532 | } | |
2533 | ||
78599c42 BF |
2534 | static int states_show(struct seq_file *s, void *v) |
2535 | { | |
2536 | struct nfs4_stid *st = v; | |
2537 | ||
2538 | switch (st->sc_type) { | |
2539 | case NFS4_OPEN_STID: | |
2540 | return nfs4_show_open(s, st); | |
16d36e09 BF |
2541 | case NFS4_LOCK_STID: |
2542 | return nfs4_show_lock(s, st); | |
2543 | case NFS4_DELEG_STID: | |
2544 | return nfs4_show_deleg(s, st); | |
0c4b62b0 BF |
2545 | case NFS4_LAYOUT_STID: |
2546 | return nfs4_show_layout(s, st); | |
78599c42 BF |
2547 | default: |
2548 | return 0; /* XXX: or SEQ_SKIP? */ | |
2549 | } | |
16d36e09 | 2550 | /* XXX: copy stateids? */ |
78599c42 BF |
2551 | } |
2552 | ||
2553 | static struct seq_operations states_seq_ops = { | |
2554 | .start = states_start, | |
2555 | .next = states_next, | |
2556 | .stop = states_stop, | |
2557 | .show = states_show | |
2558 | }; | |
2559 | ||
2560 | static int client_states_open(struct inode *inode, struct file *file) | |
2561 | { | |
78599c42 BF |
2562 | struct seq_file *s; |
2563 | struct nfs4_client *clp; | |
2564 | int ret; | |
2565 | ||
a204f25e BF |
2566 | clp = get_nfsdfs_clp(inode); |
2567 | if (!clp) | |
78599c42 | 2568 | return -ENXIO; |
78599c42 BF |
2569 | |
2570 | ret = seq_open(file, &states_seq_ops); | |
2571 | if (ret) | |
2572 | return ret; | |
2573 | s = file->private_data; | |
2574 | s->private = clp; | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | static int client_opens_release(struct inode *inode, struct file *file) | |
2579 | { | |
2580 | struct seq_file *m = file->private_data; | |
2581 | struct nfs4_client *clp = m->private; | |
2582 | ||
2583 | /* XXX: alternatively, we could get/drop in seq start/stop */ | |
2584 | drop_client(clp); | |
2585 | return 0; | |
2586 | } | |
2587 | ||
2588 | static const struct file_operations client_states_fops = { | |
2589 | .open = client_states_open, | |
2590 | .read = seq_read, | |
2591 | .llseek = seq_lseek, | |
2592 | .release = client_opens_release, | |
2593 | }; | |
2594 | ||
89c905be BF |
2595 | /* |
2596 | * Normally we refuse to destroy clients that are in use, but here the | |
2597 | * administrator is telling us to just do it. We also want to wait | |
2598 | * so the caller has a guarantee that the client's locks are gone by | |
2599 | * the time the write returns: | |
2600 | */ | |
297e57a2 | 2601 | static void force_expire_client(struct nfs4_client *clp) |
89c905be BF |
2602 | { |
2603 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2604 | bool already_expired; | |
2605 | ||
2606 | spin_lock(&clp->cl_lock); | |
2607 | clp->cl_time = 0; | |
2608 | spin_unlock(&clp->cl_lock); | |
2609 | ||
2610 | wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); | |
2611 | spin_lock(&nn->client_lock); | |
2612 | already_expired = list_empty(&clp->cl_lru); | |
2613 | if (!already_expired) | |
2614 | unhash_client_locked(clp); | |
2615 | spin_unlock(&nn->client_lock); | |
2616 | ||
2617 | if (!already_expired) | |
2618 | expire_client(clp); | |
2619 | else | |
2620 | wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); | |
2621 | } | |
2622 | ||
2623 | static ssize_t client_ctl_write(struct file *file, const char __user *buf, | |
2624 | size_t size, loff_t *pos) | |
2625 | { | |
2626 | char *data; | |
2627 | struct nfs4_client *clp; | |
2628 | ||
2629 | data = simple_transaction_get(file, buf, size); | |
2630 | if (IS_ERR(data)) | |
2631 | return PTR_ERR(data); | |
2632 | if (size != 7 || 0 != memcmp(data, "expire\n", 7)) | |
2633 | return -EINVAL; | |
2634 | clp = get_nfsdfs_clp(file_inode(file)); | |
2635 | if (!clp) | |
2636 | return -ENXIO; | |
2637 | force_expire_client(clp); | |
2638 | drop_client(clp); | |
2639 | return 7; | |
2640 | } | |
2641 | ||
2642 | static const struct file_operations client_ctl_fops = { | |
2643 | .write = client_ctl_write, | |
2644 | .release = simple_transaction_release, | |
2645 | }; | |
2646 | ||
97ad4031 BF |
2647 | static const struct tree_descr client_files[] = { |
2648 | [0] = {"info", &client_info_fops, S_IRUSR}, | |
78599c42 | 2649 | [1] = {"states", &client_states_fops, S_IRUSR}, |
6cbfad5f | 2650 | [2] = {"ctl", &client_ctl_fops, S_IWUSR}, |
78599c42 | 2651 | [3] = {""}, |
97ad4031 BF |
2652 | }; |
2653 | ||
2216d449 | 2654 | static struct nfs4_client *create_client(struct xdr_netobj name, |
b09333c4 RL |
2655 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
2656 | { | |
2657 | struct nfs4_client *clp; | |
2658 | struct sockaddr *sa = svc_addr(rqstp); | |
03a4e1f6 | 2659 | int ret; |
c212cecf | 2660 | struct net *net = SVC_NET(rqstp); |
e8a79fb1 | 2661 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b09333c4 RL |
2662 | |
2663 | clp = alloc_client(name); | |
2664 | if (clp == NULL) | |
2665 | return NULL; | |
2666 | ||
03a4e1f6 BF |
2667 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
2668 | if (ret) { | |
03a4e1f6 | 2669 | free_client(clp); |
03a4e1f6 | 2670 | return NULL; |
b09333c4 | 2671 | } |
e8a79fb1 BF |
2672 | gen_clid(clp, nn); |
2673 | kref_init(&clp->cl_nfsdfs.cl_ref); | |
0162ac2b | 2674 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
20b7d86f | 2675 | clp->cl_time = ktime_get_boottime_seconds(); |
b09333c4 | 2676 | clear_bit(0, &clp->cl_cb_slot_busy); |
b09333c4 | 2677 | copy_verf(clp, verf); |
3bade247 | 2678 | memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); |
edd76786 | 2679 | clp->cl_cb_session = NULL; |
c212cecf | 2680 | clp->net = net; |
e8a79fb1 | 2681 | clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs, |
97ad4031 BF |
2682 | clp->cl_clientid.cl_id - nn->clientid_base, |
2683 | client_files); | |
e8a79fb1 BF |
2684 | if (!clp->cl_nfsd_dentry) { |
2685 | free_client(clp); | |
2686 | return NULL; | |
2687 | } | |
b09333c4 RL |
2688 | return clp; |
2689 | } | |
2690 | ||
fd39ca9a | 2691 | static void |
ac55fdc4 JL |
2692 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
2693 | { | |
2694 | struct rb_node **new = &(root->rb_node), *parent = NULL; | |
2695 | struct nfs4_client *clp; | |
2696 | ||
2697 | while (*new) { | |
2698 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); | |
2699 | parent = *new; | |
2700 | ||
2701 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) | |
2702 | new = &((*new)->rb_left); | |
2703 | else | |
2704 | new = &((*new)->rb_right); | |
2705 | } | |
2706 | ||
2707 | rb_link_node(&new_clp->cl_namenode, parent, new); | |
2708 | rb_insert_color(&new_clp->cl_namenode, root); | |
2709 | } | |
2710 | ||
2711 | static struct nfs4_client * | |
2712 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) | |
2713 | { | |
ef17af2a | 2714 | int cmp; |
ac55fdc4 JL |
2715 | struct rb_node *node = root->rb_node; |
2716 | struct nfs4_client *clp; | |
2717 | ||
2718 | while (node) { | |
2719 | clp = rb_entry(node, struct nfs4_client, cl_namenode); | |
2720 | cmp = compare_blob(&clp->cl_name, name); | |
2721 | if (cmp > 0) | |
2722 | node = node->rb_left; | |
2723 | else if (cmp < 0) | |
2724 | node = node->rb_right; | |
2725 | else | |
2726 | return clp; | |
2727 | } | |
2728 | return NULL; | |
2729 | } | |
2730 | ||
2731 | static void | |
2732 | add_to_unconfirmed(struct nfs4_client *clp) | |
1da177e4 LT |
2733 | { |
2734 | unsigned int idhashval; | |
0a7ec377 | 2735 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2736 | |
0a880a28 TM |
2737 | lockdep_assert_held(&nn->client_lock); |
2738 | ||
ac55fdc4 | 2739 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
a99454aa | 2740 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
1da177e4 | 2741 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
0a7ec377 | 2742 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
3dbacee6 | 2743 | renew_client_locked(clp); |
1da177e4 LT |
2744 | } |
2745 | ||
fd39ca9a | 2746 | static void |
1da177e4 LT |
2747 | move_to_confirmed(struct nfs4_client *clp) |
2748 | { | |
2749 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
8daae4dc | 2750 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
1da177e4 | 2751 | |
0a880a28 TM |
2752 | lockdep_assert_held(&nn->client_lock); |
2753 | ||
1da177e4 | 2754 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
8daae4dc | 2755 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
a99454aa | 2756 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
382a62e7 | 2757 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
ac55fdc4 | 2758 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
3dbacee6 | 2759 | renew_client_locked(clp); |
1da177e4 LT |
2760 | } |
2761 | ||
2762 | static struct nfs4_client * | |
bfa85e83 | 2763 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
1da177e4 LT |
2764 | { |
2765 | struct nfs4_client *clp; | |
2766 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
2767 | ||
bfa85e83 | 2768 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
a50d2ad1 | 2769 | if (same_clid(&clp->cl_clientid, clid)) { |
d15c077e BF |
2770 | if ((bool)clp->cl_minorversion != sessions) |
2771 | return NULL; | |
3dbacee6 | 2772 | renew_client_locked(clp); |
1da177e4 | 2773 | return clp; |
a50d2ad1 | 2774 | } |
1da177e4 LT |
2775 | } |
2776 | return NULL; | |
2777 | } | |
2778 | ||
bfa85e83 BF |
2779 | static struct nfs4_client * |
2780 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) | |
2781 | { | |
2782 | struct list_head *tbl = nn->conf_id_hashtbl; | |
2783 | ||
0a880a28 | 2784 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 BF |
2785 | return find_client_in_id_table(tbl, clid, sessions); |
2786 | } | |
2787 | ||
1da177e4 | 2788 | static struct nfs4_client * |
0a7ec377 | 2789 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
1da177e4 | 2790 | { |
bfa85e83 | 2791 | struct list_head *tbl = nn->unconf_id_hashtbl; |
1da177e4 | 2792 | |
0a880a28 | 2793 | lockdep_assert_held(&nn->client_lock); |
bfa85e83 | 2794 | return find_client_in_id_table(tbl, clid, sessions); |
1da177e4 LT |
2795 | } |
2796 | ||
6e5f15c9 | 2797 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 2798 | { |
6e5f15c9 | 2799 | return clp->cl_exchange_flags != 0; |
e203d506 | 2800 | } |
a1bcecd2 | 2801 | |
28ce6054 | 2802 | static struct nfs4_client * |
382a62e7 | 2803 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2804 | { |
0a880a28 | 2805 | lockdep_assert_held(&nn->client_lock); |
382a62e7 | 2806 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
28ce6054 N |
2807 | } |
2808 | ||
2809 | static struct nfs4_client * | |
a99454aa | 2810 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
28ce6054 | 2811 | { |
0a880a28 | 2812 | lockdep_assert_held(&nn->client_lock); |
a99454aa | 2813 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
28ce6054 N |
2814 | } |
2815 | ||
fd39ca9a | 2816 | static void |
6f3d772f | 2817 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 2818 | { |
07263f1e | 2819 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
2820 | struct sockaddr *sa = svc_addr(rqstp); |
2821 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
2822 | unsigned short expected_family; |
2823 | ||
2824 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
2825 | if (se->se_callback_netid_len == 3 && | |
2826 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
2827 | expected_family = AF_INET; | |
2828 | else if (se->se_callback_netid_len == 4 && | |
2829 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
2830 | expected_family = AF_INET6; | |
2831 | else | |
1da177e4 LT |
2832 | goto out_err; |
2833 | ||
c212cecf | 2834 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
aa9a4ec7 | 2835 | se->se_callback_addr_len, |
07263f1e BF |
2836 | (struct sockaddr *)&conn->cb_addr, |
2837 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 2838 | |
07263f1e | 2839 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 2840 | goto out_err; |
aa9a4ec7 | 2841 | |
07263f1e BF |
2842 | if (conn->cb_addr.ss_family == AF_INET6) |
2843 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 2844 | |
07263f1e BF |
2845 | conn->cb_prog = se->se_callback_prog; |
2846 | conn->cb_ident = se->se_callback_ident; | |
849a1cf1 | 2847 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
1da177e4 LT |
2848 | return; |
2849 | out_err: | |
07263f1e BF |
2850 | conn->cb_addr.ss_family = AF_UNSPEC; |
2851 | conn->cb_addrlen = 0; | |
4ab495bf | 2852 | dprintk("NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
2853 | "will not receive delegations\n", |
2854 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
2855 | ||
1da177e4 LT |
2856 | return; |
2857 | } | |
2858 | ||
074fe897 | 2859 | /* |
067e1ace | 2860 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
074fe897 | 2861 | */ |
b607664e | 2862 | static void |
074fe897 | 2863 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
074fe897 | 2864 | { |
f5236013 | 2865 | struct xdr_buf *buf = resp->xdr.buf; |
557ce264 AA |
2866 | struct nfsd4_slot *slot = resp->cstate.slot; |
2867 | unsigned int base; | |
074fe897 | 2868 | |
557ce264 | 2869 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2870 | |
085def3a | 2871 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
557ce264 AA |
2872 | slot->sl_opcnt = resp->opcnt; |
2873 | slot->sl_status = resp->cstate.status; | |
53da6a53 BF |
2874 | free_svc_cred(&slot->sl_cred); |
2875 | copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); | |
074fe897 | 2876 | |
085def3a BF |
2877 | if (!nfsd4_cache_this(resp)) { |
2878 | slot->sl_flags &= ~NFSD4_SLOT_CACHED; | |
bf864a31 | 2879 | return; |
074fe897 | 2880 | } |
085def3a BF |
2881 | slot->sl_flags |= NFSD4_SLOT_CACHED; |
2882 | ||
f5236013 BF |
2883 | base = resp->cstate.data_offset; |
2884 | slot->sl_datalen = buf->len - base; | |
2885 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) | |
d3f03403 DC |
2886 | WARN(1, "%s: sessions DRC could not cache compound\n", |
2887 | __func__); | |
557ce264 | 2888 | return; |
074fe897 AA |
2889 | } |
2890 | ||
2891 | /* | |
abfabf8c AA |
2892 | * Encode the replay sequence operation from the slot values. |
2893 | * If cachethis is FALSE encode the uncached rep error on the next | |
2894 | * operation which sets resp->p and increments resp->opcnt for | |
2895 | * nfs4svc_encode_compoundres. | |
074fe897 | 2896 | * |
074fe897 | 2897 | */ |
abfabf8c AA |
2898 | static __be32 |
2899 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
2900 | struct nfsd4_compoundres *resp) | |
074fe897 | 2901 | { |
abfabf8c AA |
2902 | struct nfsd4_op *op; |
2903 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 2904 | |
abfabf8c AA |
2905 | /* Encode the replayed sequence operation */ |
2906 | op = &args->ops[resp->opcnt - 1]; | |
2907 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 2908 | |
085def3a BF |
2909 | if (slot->sl_flags & NFSD4_SLOT_CACHED) |
2910 | return op->status; | |
2911 | if (args->opcnt == 1) { | |
2912 | /* | |
2913 | * The original operation wasn't a solo sequence--we | |
2914 | * always cache those--so this retry must not match the | |
2915 | * original: | |
2916 | */ | |
2917 | op->status = nfserr_seq_false_retry; | |
2918 | } else { | |
abfabf8c AA |
2919 | op = &args->ops[resp->opcnt++]; |
2920 | op->status = nfserr_retry_uncached_rep; | |
2921 | nfsd4_encode_operation(resp, op); | |
074fe897 | 2922 | } |
abfabf8c | 2923 | return op->status; |
074fe897 AA |
2924 | } |
2925 | ||
2926 | /* | |
557ce264 AA |
2927 | * The sequence operation is not cached because we can use the slot and |
2928 | * session values. | |
074fe897 | 2929 | */ |
3ca2eb98 | 2930 | static __be32 |
bf864a31 AA |
2931 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
2932 | struct nfsd4_sequence *seq) | |
074fe897 | 2933 | { |
557ce264 | 2934 | struct nfsd4_slot *slot = resp->cstate.slot; |
f5236013 BF |
2935 | struct xdr_stream *xdr = &resp->xdr; |
2936 | __be32 *p; | |
074fe897 AA |
2937 | __be32 status; |
2938 | ||
557ce264 | 2939 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 2940 | |
abfabf8c | 2941 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
0da7b19c | 2942 | if (status) |
abfabf8c | 2943 | return status; |
074fe897 | 2944 | |
f5236013 BF |
2945 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
2946 | if (!p) { | |
2947 | WARN_ON_ONCE(1); | |
2948 | return nfserr_serverfault; | |
2949 | } | |
2950 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); | |
2951 | xdr_commit_encode(xdr); | |
074fe897 | 2952 | |
557ce264 | 2953 | resp->opcnt = slot->sl_opcnt; |
f5236013 | 2954 | return slot->sl_status; |
074fe897 AA |
2955 | } |
2956 | ||
0733d213 AA |
2957 | /* |
2958 | * Set the exchange_id flags returned by the server. | |
2959 | */ | |
2960 | static void | |
2961 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
2962 | { | |
9cf514cc CH |
2963 | #ifdef CONFIG_NFSD_PNFS |
2964 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; | |
2965 | #else | |
0733d213 | 2966 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
9cf514cc | 2967 | #endif |
0733d213 AA |
2968 | |
2969 | /* Referrals are supported, Migration is not. */ | |
2970 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
2971 | ||
2972 | /* set the wire flags to return to client. */ | |
2973 | clid->flags = new->cl_exchange_flags; | |
2974 | } | |
2975 | ||
4eaea134 BF |
2976 | static bool client_has_openowners(struct nfs4_client *clp) |
2977 | { | |
2978 | struct nfs4_openowner *oo; | |
2979 | ||
2980 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { | |
2981 | if (!list_empty(&oo->oo_owner.so_stateids)) | |
2982 | return true; | |
2983 | } | |
2984 | return false; | |
2985 | } | |
2986 | ||
631fc9ea BF |
2987 | static bool client_has_state(struct nfs4_client *clp) |
2988 | { | |
4eaea134 | 2989 | return client_has_openowners(clp) |
47e970be KM |
2990 | #ifdef CONFIG_NFSD_PNFS |
2991 | || !list_empty(&clp->cl_lo_states) | |
2992 | #endif | |
6eccece9 | 2993 | || !list_empty(&clp->cl_delegations) |
e0639dc5 OK |
2994 | || !list_empty(&clp->cl_sessions) |
2995 | || !list_empty(&clp->async_copies); | |
631fc9ea BF |
2996 | } |
2997 | ||
79123444 BF |
2998 | static __be32 copy_impl_id(struct nfs4_client *clp, |
2999 | struct nfsd4_exchange_id *exid) | |
3000 | { | |
3001 | if (!exid->nii_domain.data) | |
3002 | return 0; | |
3003 | xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); | |
3004 | if (!clp->cl_nii_domain.data) | |
3005 | return nfserr_jukebox; | |
3006 | xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); | |
3007 | if (!clp->cl_nii_name.data) | |
3008 | return nfserr_jukebox; | |
e29f4703 | 3009 | clp->cl_nii_time = exid->nii_time; |
79123444 BF |
3010 | return 0; |
3011 | } | |
3012 | ||
069b6ad4 | 3013 | __be32 |
eb69853d CH |
3014 | nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3015 | union nfsd4_op_u *u) | |
069b6ad4 | 3016 | { |
eb69853d | 3017 | struct nfsd4_exchange_id *exid = &u->exchange_id; |
3dbacee6 TM |
3018 | struct nfs4_client *conf, *new; |
3019 | struct nfs4_client *unconf = NULL; | |
57b7b43b | 3020 | __be32 status; |
363168b4 | 3021 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 3022 | nfs4_verifier verf = exid->verifier; |
363168b4 | 3023 | struct sockaddr *sa = svc_addr(rqstp); |
83e08fd4 | 3024 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
c212cecf | 3025 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
0733d213 | 3026 | |
363168b4 | 3027 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 3028 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 3029 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 3030 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 3031 | addr_str, exid->flags, exid->spa_how); |
0733d213 | 3032 | |
a084daf5 | 3033 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
0733d213 AA |
3034 | return nfserr_inval; |
3035 | ||
50c7b948 BF |
3036 | new = create_client(exid->clname, rqstp, &verf); |
3037 | if (new == NULL) | |
3038 | return nfserr_jukebox; | |
79123444 BF |
3039 | status = copy_impl_id(new, exid); |
3040 | if (status) | |
3041 | goto out_nolock; | |
50c7b948 | 3042 | |
0733d213 | 3043 | switch (exid->spa_how) { |
57266a6e | 3044 | case SP4_MACH_CRED: |
ed941643 AE |
3045 | exid->spo_must_enforce[0] = 0; |
3046 | exid->spo_must_enforce[1] = ( | |
3047 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3048 | 1 << (OP_EXCHANGE_ID - 32) | | |
3049 | 1 << (OP_CREATE_SESSION - 32) | | |
3050 | 1 << (OP_DESTROY_SESSION - 32) | | |
3051 | 1 << (OP_DESTROY_CLIENTID - 32)); | |
3052 | ||
3053 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | | |
3054 | 1 << (OP_OPEN_DOWNGRADE) | | |
3055 | 1 << (OP_LOCKU) | | |
3056 | 1 << (OP_DELEGRETURN)); | |
3057 | ||
3058 | exid->spo_must_allow[1] &= ( | |
3059 | 1 << (OP_TEST_STATEID - 32) | | |
3060 | 1 << (OP_FREE_STATEID - 32)); | |
50c7b948 BF |
3061 | if (!svc_rqst_integrity_protected(rqstp)) { |
3062 | status = nfserr_inval; | |
3063 | goto out_nolock; | |
920dd9bb BF |
3064 | } |
3065 | /* | |
3066 | * Sometimes userspace doesn't give us a principal. | |
3067 | * Which is a bug, really. Anyway, we can't enforce | |
3068 | * MACH_CRED in that case, better to give up now: | |
3069 | */ | |
414ca017 BF |
3070 | if (!new->cl_cred.cr_principal && |
3071 | !new->cl_cred.cr_raw_principal) { | |
920dd9bb BF |
3072 | status = nfserr_serverfault; |
3073 | goto out_nolock; | |
50c7b948 BF |
3074 | } |
3075 | new->cl_mach_cred = true; | |
0733d213 AA |
3076 | case SP4_NONE: |
3077 | break; | |
063b0fb9 BF |
3078 | default: /* checked by xdr code */ |
3079 | WARN_ON_ONCE(1); | |
0a4c9265 | 3080 | /* fall through */ |
0733d213 | 3081 | case SP4_SSV: |
8edf4b02 KM |
3082 | status = nfserr_encr_alg_unsupp; |
3083 | goto out_nolock; | |
0733d213 AA |
3084 | } |
3085 | ||
2dbb269d | 3086 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
3dbacee6 | 3087 | spin_lock(&nn->client_lock); |
382a62e7 | 3088 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
0733d213 | 3089 | if (conf) { |
83e08fd4 BF |
3090 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
3091 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); | |
3092 | ||
136e658d BF |
3093 | if (update) { |
3094 | if (!clp_used_exchangeid(conf)) { /* buggy client */ | |
2dbb269d | 3095 | status = nfserr_inval; |
1a308118 BF |
3096 | goto out; |
3097 | } | |
dedeb13f | 3098 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
57266a6e BF |
3099 | status = nfserr_wrong_cred; |
3100 | goto out; | |
3101 | } | |
136e658d | 3102 | if (!creds_match) { /* case 9 */ |
ea236d07 | 3103 | status = nfserr_perm; |
136e658d BF |
3104 | goto out; |
3105 | } | |
3106 | if (!verfs_match) { /* case 8 */ | |
0733d213 AA |
3107 | status = nfserr_not_same; |
3108 | goto out; | |
3109 | } | |
136e658d BF |
3110 | /* case 6 */ |
3111 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
136e658d | 3112 | goto out_copy; |
0733d213 | 3113 | } |
136e658d | 3114 | if (!creds_match) { /* case 3 */ |
631fc9ea BF |
3115 | if (client_has_state(conf)) { |
3116 | status = nfserr_clid_inuse; | |
0733d213 AA |
3117 | goto out; |
3118 | } | |
0733d213 AA |
3119 | goto out_new; |
3120 | } | |
136e658d | 3121 | if (verfs_match) { /* case 2 */ |
0f1ba0ef | 3122 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
136e658d BF |
3123 | goto out_copy; |
3124 | } | |
3125 | /* case 5, client reboot */ | |
3dbacee6 | 3126 | conf = NULL; |
136e658d | 3127 | goto out_new; |
6ddbbbfe MS |
3128 | } |
3129 | ||
2dbb269d | 3130 | if (update) { /* case 7 */ |
6ddbbbfe MS |
3131 | status = nfserr_noent; |
3132 | goto out; | |
0733d213 AA |
3133 | } |
3134 | ||
a99454aa | 3135 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
2dbb269d | 3136 | if (unconf) /* case 4, possible retry or client restart */ |
3dbacee6 | 3137 | unhash_client_locked(unconf); |
0733d213 | 3138 | |
2dbb269d | 3139 | /* case 1 (normal case) */ |
0733d213 | 3140 | out_new: |
fd699b8a JL |
3141 | if (conf) { |
3142 | status = mark_client_expired_locked(conf); | |
3143 | if (status) | |
3144 | goto out; | |
3145 | } | |
4f540e29 | 3146 | new->cl_minorversion = cstate->minorversion; |
ed941643 AE |
3147 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
3148 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; | |
0733d213 | 3149 | |
ac55fdc4 | 3150 | add_to_unconfirmed(new); |
3dbacee6 | 3151 | swap(new, conf); |
0733d213 | 3152 | out_copy: |
5cc40fd7 TM |
3153 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
3154 | exid->clientid.cl_id = conf->cl_clientid.cl_id; | |
0733d213 | 3155 | |
5cc40fd7 TM |
3156 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
3157 | nfsd4_set_ex_flags(conf, exid); | |
0733d213 AA |
3158 | |
3159 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
5cc40fd7 | 3160 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
0733d213 AA |
3161 | status = nfs_ok; |
3162 | ||
3163 | out: | |
3dbacee6 | 3164 | spin_unlock(&nn->client_lock); |
50c7b948 | 3165 | out_nolock: |
5cc40fd7 | 3166 | if (new) |
3dbacee6 TM |
3167 | expire_client(new); |
3168 | if (unconf) | |
3169 | expire_client(unconf); | |
0733d213 | 3170 | return status; |
069b6ad4 AA |
3171 | } |
3172 | ||
57b7b43b | 3173 | static __be32 |
88e588d5 | 3174 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 3175 | { |
88e588d5 AA |
3176 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
3177 | slot_seqid); | |
b85d4c01 BH |
3178 | |
3179 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
3180 | if (slot_inuse) { |
3181 | if (seqid == slot_seqid) | |
b85d4c01 BH |
3182 | return nfserr_jukebox; |
3183 | else | |
3184 | return nfserr_seq_misordered; | |
3185 | } | |
f6d82485 | 3186 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
88e588d5 | 3187 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 | 3188 | return nfs_ok; |
88e588d5 | 3189 | if (seqid == slot_seqid) |
b85d4c01 | 3190 | return nfserr_replay_cache; |
b85d4c01 BH |
3191 | return nfserr_seq_misordered; |
3192 | } | |
3193 | ||
49557cc7 AA |
3194 | /* |
3195 | * Cache the create session result into the create session single DRC | |
3196 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
3197 | * Do this for solo or embedded create session operations. | |
3198 | */ | |
3199 | static void | |
3200 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
57b7b43b | 3201 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
49557cc7 AA |
3202 | { |
3203 | slot->sl_status = nfserr; | |
3204 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
3205 | } | |
3206 | ||
3207 | static __be32 | |
3208 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
3209 | struct nfsd4_clid_slot *slot) | |
3210 | { | |
3211 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
3212 | return slot->sl_status; | |
3213 | } | |
3214 | ||
1b74c25b MJ |
3215 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
3216 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
3217 | 1 + /* MIN tag is length with zero, only length */ \ | |
3218 | 3 + /* version, opcount, opcode */ \ | |
3219 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3220 | /* seqid, slotID, slotID, cache */ \ | |
3221 | 4 ) * sizeof(__be32)) | |
3222 | ||
3223 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
3224 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
3225 | 1 + /* status */ \ | |
3226 | 1 + /* MIN tag is length with zero, only length */ \ | |
3227 | 3 + /* opcount, opcode, opstatus*/ \ | |
3228 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
3229 | /* seqid, slotID, slotID, slotID, status */ \ | |
3230 | 5 ) * sizeof(__be32)) | |
3231 | ||
55c760cf | 3232 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
1b74c25b | 3233 | { |
55c760cf BF |
3234 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
3235 | ||
373cd409 BF |
3236 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
3237 | return nfserr_toosmall; | |
3238 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) | |
3239 | return nfserr_toosmall; | |
55c760cf BF |
3240 | ca->headerpadsz = 0; |
3241 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); | |
3242 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); | |
3243 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
3244 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, | |
3245 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); | |
3246 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); | |
3247 | /* | |
3248 | * Note decreasing slot size below client's request may make it | |
3249 | * difficult for client to function correctly, whereas | |
3250 | * decreasing the number of slots will (just?) affect | |
3251 | * performance. When short on memory we therefore prefer to | |
3252 | * decrease number of slots instead of their size. Clients that | |
3253 | * request larger slots than they need will get poor results: | |
7f49fd5d N |
3254 | * Note that we always allow at least one slot, because our |
3255 | * accounting is soft and provides no guarantees either way. | |
55c760cf | 3256 | */ |
2030ca56 | 3257 | ca->maxreqs = nfsd4_get_drc_mem(ca, nn); |
55c760cf | 3258 | |
373cd409 | 3259 | return nfs_ok; |
1b74c25b MJ |
3260 | } |
3261 | ||
4500632f CL |
3262 | /* |
3263 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. | |
3264 | * These are based on similar macros in linux/sunrpc/msg_prot.h . | |
3265 | */ | |
3266 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ | |
3267 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) | |
3268 | ||
3269 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ | |
3270 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) | |
3271 | ||
8a891633 | 3272 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
4500632f | 3273 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
8a891633 | 3274 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
4500632f CL |
3275 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
3276 | sizeof(__be32)) | |
8a891633 | 3277 | |
06b332a5 | 3278 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
1b74c25b | 3279 | { |
06b332a5 BF |
3280 | ca->headerpadsz = 0; |
3281 | ||
8a891633 | 3282 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
06b332a5 | 3283 | return nfserr_toosmall; |
8a891633 | 3284 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
06b332a5 BF |
3285 | return nfserr_toosmall; |
3286 | ca->maxresp_cached = 0; | |
3287 | if (ca->maxops < 2) | |
3288 | return nfserr_toosmall; | |
3289 | ||
3290 | return nfs_ok; | |
1b74c25b MJ |
3291 | } |
3292 | ||
b78724b7 BF |
3293 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
3294 | { | |
3295 | switch (cbs->flavor) { | |
3296 | case RPC_AUTH_NULL: | |
3297 | case RPC_AUTH_UNIX: | |
3298 | return nfs_ok; | |
3299 | default: | |
3300 | /* | |
3301 | * GSS case: the spec doesn't allow us to return this | |
3302 | * error. But it also doesn't allow us not to support | |
3303 | * GSS. | |
3304 | * I'd rather this fail hard than return some error the | |
3305 | * client might think it can already handle: | |
3306 | */ | |
3307 | return nfserr_encr_alg_unsupp; | |
3308 | } | |
3309 | } | |
3310 | ||
069b6ad4 AA |
3311 | __be32 |
3312 | nfsd4_create_session(struct svc_rqst *rqstp, | |
eb69853d | 3313 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
069b6ad4 | 3314 | { |
eb69853d | 3315 | struct nfsd4_create_session *cr_ses = &u->create_session; |
363168b4 | 3316 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 3317 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3318 | struct nfs4_client *old = NULL; |
ac7c46f2 | 3319 | struct nfsd4_session *new; |
81f0b2a4 | 3320 | struct nfsd4_conn *conn; |
49557cc7 | 3321 | struct nfsd4_clid_slot *cs_slot = NULL; |
57b7b43b | 3322 | __be32 status = 0; |
8daae4dc | 3323 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
ec6b5d7b | 3324 | |
a62573dc MJ |
3325 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
3326 | return nfserr_inval; | |
b78724b7 BF |
3327 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
3328 | if (status) | |
3329 | return status; | |
55c760cf | 3330 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
06b332a5 BF |
3331 | if (status) |
3332 | return status; | |
3333 | status = check_backchannel_attrs(&cr_ses->back_channel); | |
373cd409 | 3334 | if (status) |
f403e450 | 3335 | goto out_release_drc_mem; |
81f0b2a4 | 3336 | status = nfserr_jukebox; |
60810e54 | 3337 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
55c760cf BF |
3338 | if (!new) |
3339 | goto out_release_drc_mem; | |
81f0b2a4 BF |
3340 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
3341 | if (!conn) | |
3342 | goto out_free_session; | |
a62573dc | 3343 | |
d20c11d8 | 3344 | spin_lock(&nn->client_lock); |
0a7ec377 | 3345 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
8daae4dc | 3346 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
78389046 | 3347 | WARN_ON_ONCE(conf && unconf); |
ec6b5d7b AA |
3348 | |
3349 | if (conf) { | |
57266a6e | 3350 | status = nfserr_wrong_cred; |
dedeb13f | 3351 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
57266a6e | 3352 | goto out_free_conn; |
49557cc7 AA |
3353 | cs_slot = &conf->cl_cs_slot; |
3354 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
f5e22bb6 KM |
3355 | if (status) { |
3356 | if (status == nfserr_replay_cache) | |
3357 | status = nfsd4_replay_create_session(cr_ses, cs_slot); | |
81f0b2a4 | 3358 | goto out_free_conn; |
ec6b5d7b | 3359 | } |
ec6b5d7b AA |
3360 | } else if (unconf) { |
3361 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 3362 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b | 3363 | status = nfserr_clid_inuse; |
81f0b2a4 | 3364 | goto out_free_conn; |
ec6b5d7b | 3365 | } |
57266a6e | 3366 | status = nfserr_wrong_cred; |
dedeb13f | 3367 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
57266a6e | 3368 | goto out_free_conn; |
49557cc7 AA |
3369 | cs_slot = &unconf->cl_cs_slot; |
3370 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
3371 | if (status) { |
3372 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 3373 | status = nfserr_seq_misordered; |
81f0b2a4 | 3374 | goto out_free_conn; |
ec6b5d7b | 3375 | } |
382a62e7 | 3376 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
221a6876 | 3377 | if (old) { |
d20c11d8 | 3378 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3379 | if (status) { |
3380 | old = NULL; | |
221a6876 | 3381 | goto out_free_conn; |
7abea1e8 | 3382 | } |
221a6876 | 3383 | } |
8f9d3d3b | 3384 | move_to_confirmed(unconf); |
ec6b5d7b AA |
3385 | conf = unconf; |
3386 | } else { | |
3387 | status = nfserr_stale_clientid; | |
81f0b2a4 | 3388 | goto out_free_conn; |
ec6b5d7b | 3389 | } |
81f0b2a4 | 3390 | status = nfs_ok; |
4ce85c8c | 3391 | /* Persistent sessions are not supported */ |
408b79bc | 3392 | cr_ses->flags &= ~SESSION4_PERSIST; |
4ce85c8c | 3393 | /* Upshifting from TCP to RDMA is not supported */ |
408b79bc BF |
3394 | cr_ses->flags &= ~SESSION4_RDMA; |
3395 | ||
81f0b2a4 | 3396 | init_session(rqstp, new, conf, cr_ses); |
d20c11d8 | 3397 | nfsd4_get_session_locked(new); |
81f0b2a4 | 3398 | |
ac7c46f2 | 3399 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
ec6b5d7b | 3400 | NFS4_MAX_SESSIONID_LEN); |
86c3e16c | 3401 | cs_slot->sl_seqid++; |
49557cc7 | 3402 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 3403 | |
d20c11d8 | 3404 | /* cache solo and embedded create sessions under the client_lock */ |
49557cc7 | 3405 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
d20c11d8 JL |
3406 | spin_unlock(&nn->client_lock); |
3407 | /* init connection and backchannel */ | |
3408 | nfsd4_init_conn(rqstp, conn, new); | |
3409 | nfsd4_put_session(new); | |
d20c11d8 JL |
3410 | if (old) |
3411 | expire_client(old); | |
ec6b5d7b | 3412 | return status; |
81f0b2a4 | 3413 | out_free_conn: |
d20c11d8 | 3414 | spin_unlock(&nn->client_lock); |
81f0b2a4 | 3415 | free_conn(conn); |
d20c11d8 JL |
3416 | if (old) |
3417 | expire_client(old); | |
81f0b2a4 BF |
3418 | out_free_session: |
3419 | __free_session(new); | |
55c760cf BF |
3420 | out_release_drc_mem: |
3421 | nfsd4_put_drc_mem(&cr_ses->fore_channel); | |
1ca50792 | 3422 | return status; |
069b6ad4 AA |
3423 | } |
3424 | ||
1d1bc8f2 BF |
3425 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
3426 | { | |
3427 | switch (*dir) { | |
3428 | case NFS4_CDFC4_FORE: | |
3429 | case NFS4_CDFC4_BACK: | |
3430 | return nfs_ok; | |
3431 | case NFS4_CDFC4_FORE_OR_BOTH: | |
3432 | case NFS4_CDFC4_BACK_OR_BOTH: | |
3433 | *dir = NFS4_CDFC4_BOTH; | |
3434 | return nfs_ok; | |
fc5fc5d7 | 3435 | } |
1d1bc8f2 BF |
3436 | return nfserr_inval; |
3437 | } | |
3438 | ||
eb69853d CH |
3439 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, |
3440 | struct nfsd4_compound_state *cstate, | |
3441 | union nfsd4_op_u *u) | |
cb73a9f4 | 3442 | { |
eb69853d | 3443 | struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; |
cb73a9f4 | 3444 | struct nfsd4_session *session = cstate->session; |
c9a49628 | 3445 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
b78724b7 | 3446 | __be32 status; |
cb73a9f4 | 3447 | |
b78724b7 BF |
3448 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
3449 | if (status) | |
3450 | return status; | |
c9a49628 | 3451 | spin_lock(&nn->client_lock); |
cb73a9f4 BF |
3452 | session->se_cb_prog = bc->bc_cb_program; |
3453 | session->se_cb_sec = bc->bc_cb_sec; | |
c9a49628 | 3454 | spin_unlock(&nn->client_lock); |
cb73a9f4 BF |
3455 | |
3456 | nfsd4_probe_callback(session->se_client); | |
3457 | ||
3458 | return nfs_ok; | |
3459 | } | |
3460 | ||
1d1bc8f2 BF |
3461 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
3462 | struct nfsd4_compound_state *cstate, | |
eb69853d | 3463 | union nfsd4_op_u *u) |
1d1bc8f2 | 3464 | { |
eb69853d | 3465 | struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; |
1d1bc8f2 | 3466 | __be32 status; |
3ba63671 | 3467 | struct nfsd4_conn *conn; |
4f6e6c17 | 3468 | struct nfsd4_session *session; |
d4e19e70 TM |
3469 | struct net *net = SVC_NET(rqstp); |
3470 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1d1bc8f2 BF |
3471 | |
3472 | if (!nfsd4_last_compound_op(rqstp)) | |
3473 | return nfserr_not_only_op; | |
c9a49628 | 3474 | spin_lock(&nn->client_lock); |
d4e19e70 | 3475 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
c9a49628 | 3476 | spin_unlock(&nn->client_lock); |
4f6e6c17 | 3477 | if (!session) |
d4e19e70 | 3478 | goto out_no_session; |
57266a6e | 3479 | status = nfserr_wrong_cred; |
dedeb13f | 3480 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
57266a6e | 3481 | goto out; |
1d1bc8f2 | 3482 | status = nfsd4_map_bcts_dir(&bcts->dir); |
3ba63671 | 3483 | if (status) |
4f6e6c17 | 3484 | goto out; |
3ba63671 | 3485 | conn = alloc_conn(rqstp, bcts->dir); |
4f6e6c17 | 3486 | status = nfserr_jukebox; |
3ba63671 | 3487 | if (!conn) |
4f6e6c17 BF |
3488 | goto out; |
3489 | nfsd4_init_conn(rqstp, conn, session); | |
3490 | status = nfs_ok; | |
3491 | out: | |
d4e19e70 TM |
3492 | nfsd4_put_session(session); |
3493 | out_no_session: | |
4f6e6c17 | 3494 | return status; |
1d1bc8f2 BF |
3495 | } |
3496 | ||
665d5072 | 3497 | static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) |
5d4cec2f | 3498 | { |
665d5072 | 3499 | if (!cstate->session) |
51d87bc2 | 3500 | return false; |
665d5072 | 3501 | return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); |
5d4cec2f BF |
3502 | } |
3503 | ||
069b6ad4 | 3504 | __be32 |
eb69853d CH |
3505 | nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, |
3506 | union nfsd4_op_u *u) | |
069b6ad4 | 3507 | { |
ca0552f4 | 3508 | struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; |
e10e0cfc | 3509 | struct nfsd4_session *ses; |
abcdff09 | 3510 | __be32 status; |
f0f51f5c | 3511 | int ref_held_by_me = 0; |
d4e19e70 TM |
3512 | struct net *net = SVC_NET(r); |
3513 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
e10e0cfc | 3514 | |
abcdff09 | 3515 | status = nfserr_not_only_op; |
ca0552f4 | 3516 | if (nfsd4_compound_in_session(cstate, sessionid)) { |
57716355 | 3517 | if (!nfsd4_last_compound_op(r)) |
abcdff09 | 3518 | goto out; |
f0f51f5c | 3519 | ref_held_by_me++; |
57716355 | 3520 | } |
ca0552f4 | 3521 | dump_sessionid(__func__, sessionid); |
c9a49628 | 3522 | spin_lock(&nn->client_lock); |
ca0552f4 | 3523 | ses = find_in_sessionid_hashtbl(sessionid, net, &status); |
abcdff09 BF |
3524 | if (!ses) |
3525 | goto out_client_lock; | |
57266a6e | 3526 | status = nfserr_wrong_cred; |
dedeb13f | 3527 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
d4e19e70 | 3528 | goto out_put_session; |
f0f51f5c | 3529 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
66b2b9b2 | 3530 | if (status) |
f0f51f5c | 3531 | goto out_put_session; |
e10e0cfc | 3532 | unhash_session(ses); |
c9a49628 | 3533 | spin_unlock(&nn->client_lock); |
e10e0cfc | 3534 | |
84f5f7cc | 3535 | nfsd4_probe_callback_sync(ses->se_client); |
19cf5c02 | 3536 | |
c9a49628 | 3537 | spin_lock(&nn->client_lock); |
e10e0cfc | 3538 | status = nfs_ok; |
f0f51f5c | 3539 | out_put_session: |
d4e19e70 | 3540 | nfsd4_put_session_locked(ses); |
abcdff09 BF |
3541 | out_client_lock: |
3542 | spin_unlock(&nn->client_lock); | |
e10e0cfc | 3543 | out: |
e10e0cfc | 3544 | return status; |
069b6ad4 AA |
3545 | } |
3546 | ||
a663bdd8 | 3547 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
3548 | { |
3549 | struct nfsd4_conn *c; | |
3550 | ||
3551 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 3552 | if (c->cn_xprt == xpt) { |
328ead28 BF |
3553 | return c; |
3554 | } | |
3555 | } | |
3556 | return NULL; | |
3557 | } | |
3558 | ||
57266a6e | 3559 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
3560 | { |
3561 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 3562 | struct nfsd4_conn *c; |
57266a6e | 3563 | __be32 status = nfs_ok; |
21b75b01 | 3564 | int ret; |
328ead28 BF |
3565 | |
3566 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 3567 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
57266a6e BF |
3568 | if (c) |
3569 | goto out_free; | |
3570 | status = nfserr_conn_not_bound_to_session; | |
3571 | if (clp->cl_mach_cred) | |
3572 | goto out_free; | |
328ead28 BF |
3573 | __nfsd4_hash_conn(new, ses); |
3574 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
3575 | ret = nfsd4_register_conn(new); |
3576 | if (ret) | |
3577 | /* oops; xprt is already down: */ | |
3578 | nfsd4_conn_lost(&new->cn_xpt_user); | |
57266a6e BF |
3579 | return nfs_ok; |
3580 | out_free: | |
3581 | spin_unlock(&clp->cl_lock); | |
3582 | free_conn(new); | |
3583 | return status; | |
328ead28 BF |
3584 | } |
3585 | ||
868b89c3 MJ |
3586 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
3587 | { | |
3588 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3589 | ||
3590 | return args->opcnt > session->se_fchannel.maxops; | |
3591 | } | |
3592 | ||
ae82a8d0 MJ |
3593 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
3594 | struct nfsd4_session *session) | |
3595 | { | |
3596 | struct xdr_buf *xb = &rqstp->rq_arg; | |
3597 | ||
3598 | return xb->len > session->se_fchannel.maxreq_sz; | |
3599 | } | |
3600 | ||
53da6a53 BF |
3601 | static bool replay_matches_cache(struct svc_rqst *rqstp, |
3602 | struct nfsd4_sequence *seq, struct nfsd4_slot *slot) | |
3603 | { | |
3604 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
3605 | ||
3606 | if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != | |
3607 | (bool)seq->cachethis) | |
3608 | return false; | |
3609 | /* | |
6e73e92b SM |
3610 | * If there's an error then the reply can have fewer ops than |
3611 | * the call. | |
53da6a53 | 3612 | */ |
6e73e92b SM |
3613 | if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) |
3614 | return false; | |
3615 | /* | |
3616 | * But if we cached a reply with *more* ops than the call you're | |
3617 | * sending us now, then this new call is clearly not really a | |
3618 | * replay of the old one: | |
3619 | */ | |
3620 | if (slot->sl_opcnt > argp->opcnt) | |
53da6a53 BF |
3621 | return false; |
3622 | /* This is the only check explicitly called by spec: */ | |
3623 | if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) | |
3624 | return false; | |
3625 | /* | |
3626 | * There may be more comparisons we could actually do, but the | |
3627 | * spec doesn't require us to catch every case where the calls | |
3628 | * don't match (that would require caching the call as well as | |
3629 | * the reply), so we don't bother. | |
3630 | */ | |
3631 | return true; | |
3632 | } | |
3633 | ||
069b6ad4 | 3634 | __be32 |
eb69853d CH |
3635 | nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3636 | union nfsd4_op_u *u) | |
069b6ad4 | 3637 | { |
eb69853d | 3638 | struct nfsd4_sequence *seq = &u->sequence; |
f9bb94c4 | 3639 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
47ee5298 | 3640 | struct xdr_stream *xdr = &resp->xdr; |
b85d4c01 | 3641 | struct nfsd4_session *session; |
221a6876 | 3642 | struct nfs4_client *clp; |
b85d4c01 | 3643 | struct nfsd4_slot *slot; |
a663bdd8 | 3644 | struct nfsd4_conn *conn; |
57b7b43b | 3645 | __be32 status; |
47ee5298 | 3646 | int buflen; |
d4e19e70 TM |
3647 | struct net *net = SVC_NET(rqstp); |
3648 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
b85d4c01 | 3649 | |
f9bb94c4 AA |
3650 | if (resp->opcnt != 1) |
3651 | return nfserr_sequence_pos; | |
3652 | ||
a663bdd8 BF |
3653 | /* |
3654 | * Will be either used or freed by nfsd4_sequence_check_conn | |
3655 | * below. | |
3656 | */ | |
3657 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
3658 | if (!conn) | |
3659 | return nfserr_jukebox; | |
3660 | ||
c9a49628 | 3661 | spin_lock(&nn->client_lock); |
d4e19e70 | 3662 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
b85d4c01 | 3663 | if (!session) |
221a6876 BF |
3664 | goto out_no_session; |
3665 | clp = session->se_client; | |
b85d4c01 | 3666 | |
868b89c3 MJ |
3667 | status = nfserr_too_many_ops; |
3668 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
66b2b9b2 | 3669 | goto out_put_session; |
868b89c3 | 3670 | |
ae82a8d0 MJ |
3671 | status = nfserr_req_too_big; |
3672 | if (nfsd4_request_too_big(rqstp, session)) | |
66b2b9b2 | 3673 | goto out_put_session; |
ae82a8d0 | 3674 | |
b85d4c01 | 3675 | status = nfserr_badslot; |
6c18ba9f | 3676 | if (seq->slotid >= session->se_fchannel.maxreqs) |
66b2b9b2 | 3677 | goto out_put_session; |
b85d4c01 | 3678 | |
557ce264 | 3679 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
3680 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
3681 | ||
a8dfdaeb AA |
3682 | /* We do not negotiate the number of slots yet, so set the |
3683 | * maxslots to the session maxreqs which is used to encode | |
3684 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
3685 | seq->maxslots = session->se_fchannel.maxreqs; | |
3686 | ||
73e79482 BF |
3687 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
3688 | slot->sl_flags & NFSD4_SLOT_INUSE); | |
b85d4c01 | 3689 | if (status == nfserr_replay_cache) { |
bf5c43c8 BF |
3690 | status = nfserr_seq_misordered; |
3691 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) | |
66b2b9b2 | 3692 | goto out_put_session; |
53da6a53 BF |
3693 | status = nfserr_seq_false_retry; |
3694 | if (!replay_matches_cache(rqstp, seq, slot)) | |
3695 | goto out_put_session; | |
b85d4c01 BH |
3696 | cstate->slot = slot; |
3697 | cstate->session = session; | |
4b24ca7d | 3698 | cstate->clp = clp; |
da3846a2 | 3699 | /* Return the cached reply status and set cstate->status |
557ce264 | 3700 | * for nfsd4_proc_compound processing */ |
bf864a31 | 3701 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 3702 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 3703 | goto out; |
b85d4c01 BH |
3704 | } |
3705 | if (status) | |
66b2b9b2 | 3706 | goto out_put_session; |
b85d4c01 | 3707 | |
57266a6e | 3708 | status = nfsd4_sequence_check_conn(conn, session); |
a663bdd8 | 3709 | conn = NULL; |
57266a6e BF |
3710 | if (status) |
3711 | goto out_put_session; | |
328ead28 | 3712 | |
47ee5298 BF |
3713 | buflen = (seq->cachethis) ? |
3714 | session->se_fchannel.maxresp_cached : | |
3715 | session->se_fchannel.maxresp_sz; | |
3716 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : | |
3717 | nfserr_rep_too_big; | |
a5cddc88 | 3718 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
47ee5298 | 3719 | goto out_put_session; |
32aaa62e | 3720 | svc_reserve(rqstp, buflen); |
47ee5298 BF |
3721 | |
3722 | status = nfs_ok; | |
b85d4c01 | 3723 | /* Success! bump slot seqid */ |
b85d4c01 | 3724 | slot->sl_seqid = seq->seqid; |
bf5c43c8 | 3725 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
73e79482 BF |
3726 | if (seq->cachethis) |
3727 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; | |
bf5c43c8 BF |
3728 | else |
3729 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; | |
b85d4c01 BH |
3730 | |
3731 | cstate->slot = slot; | |
3732 | cstate->session = session; | |
4b24ca7d | 3733 | cstate->clp = clp; |
b85d4c01 | 3734 | |
b85d4c01 | 3735 | out: |
221a6876 BF |
3736 | switch (clp->cl_cb_state) { |
3737 | case NFSD4_CB_DOWN: | |
3738 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; | |
3739 | break; | |
3740 | case NFSD4_CB_FAULT: | |
3741 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; | |
3742 | break; | |
3743 | default: | |
3744 | seq->status_flags = 0; | |
aaf84eb9 | 3745 | } |
3bd64a5b BF |
3746 | if (!list_empty(&clp->cl_revoked)) |
3747 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; | |
221a6876 | 3748 | out_no_session: |
3f42d2c4 KM |
3749 | if (conn) |
3750 | free_conn(conn); | |
c9a49628 | 3751 | spin_unlock(&nn->client_lock); |
b85d4c01 | 3752 | return status; |
66b2b9b2 | 3753 | out_put_session: |
d4e19e70 | 3754 | nfsd4_put_session_locked(session); |
221a6876 | 3755 | goto out_no_session; |
069b6ad4 AA |
3756 | } |
3757 | ||
b607664e TM |
3758 | void |
3759 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) | |
3760 | { | |
3761 | struct nfsd4_compound_state *cs = &resp->cstate; | |
3762 | ||
3763 | if (nfsd4_has_session(cs)) { | |
b607664e TM |
3764 | if (cs->status != nfserr_replay_cache) { |
3765 | nfsd4_store_cache_entry(resp); | |
3766 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; | |
3767 | } | |
d4e19e70 | 3768 | /* Drop session reference that was taken in nfsd4_sequence() */ |
b607664e | 3769 | nfsd4_put_session(cs->session); |
4b24ca7d JL |
3770 | } else if (cs->clp) |
3771 | put_client_renew(cs->clp); | |
b607664e TM |
3772 | } |
3773 | ||
345c2842 | 3774 | __be32 |
eb69853d CH |
3775 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, |
3776 | struct nfsd4_compound_state *cstate, | |
3777 | union nfsd4_op_u *u) | |
345c2842 | 3778 | { |
eb69853d | 3779 | struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; |
6b10ad19 TM |
3780 | struct nfs4_client *conf, *unconf; |
3781 | struct nfs4_client *clp = NULL; | |
57b7b43b | 3782 | __be32 status = 0; |
8daae4dc | 3783 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
345c2842 | 3784 | |
6b10ad19 | 3785 | spin_lock(&nn->client_lock); |
0a7ec377 | 3786 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
8daae4dc | 3787 | conf = find_confirmed_client(&dc->clientid, true, nn); |
78389046 | 3788 | WARN_ON_ONCE(conf && unconf); |
345c2842 MJ |
3789 | |
3790 | if (conf) { | |
c0293b01 | 3791 | if (client_has_state(conf)) { |
345c2842 MJ |
3792 | status = nfserr_clientid_busy; |
3793 | goto out; | |
3794 | } | |
fd699b8a JL |
3795 | status = mark_client_expired_locked(conf); |
3796 | if (status) | |
3797 | goto out; | |
6b10ad19 | 3798 | clp = conf; |
345c2842 MJ |
3799 | } else if (unconf) |
3800 | clp = unconf; | |
3801 | else { | |
3802 | status = nfserr_stale_clientid; | |
3803 | goto out; | |
3804 | } | |
dedeb13f | 3805 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
6b10ad19 | 3806 | clp = NULL; |
57266a6e BF |
3807 | status = nfserr_wrong_cred; |
3808 | goto out; | |
3809 | } | |
6b10ad19 | 3810 | unhash_client_locked(clp); |
345c2842 | 3811 | out: |
6b10ad19 | 3812 | spin_unlock(&nn->client_lock); |
6b10ad19 TM |
3813 | if (clp) |
3814 | expire_client(clp); | |
345c2842 MJ |
3815 | return status; |
3816 | } | |
3817 | ||
4dc6ec00 | 3818 | __be32 |
eb69853d CH |
3819 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, |
3820 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) | |
4dc6ec00 | 3821 | { |
eb69853d | 3822 | struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; |
57b7b43b | 3823 | __be32 status = 0; |
bcecf1cc | 3824 | |
4dc6ec00 BF |
3825 | if (rc->rca_one_fs) { |
3826 | if (!cstate->current_fh.fh_dentry) | |
3827 | return nfserr_nofilehandle; | |
3828 | /* | |
3829 | * We don't take advantage of the rca_one_fs case. | |
3830 | * That's OK, it's optional, we can safely ignore it. | |
3831 | */ | |
d28c442f | 3832 | return nfs_ok; |
4dc6ec00 | 3833 | } |
bcecf1cc | 3834 | |
bcecf1cc | 3835 | status = nfserr_complete_already; |
a52d726b JL |
3836 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
3837 | &cstate->session->se_client->cl_flags)) | |
bcecf1cc MJ |
3838 | goto out; |
3839 | ||
3840 | status = nfserr_stale_clientid; | |
3841 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
3842 | /* |
3843 | * The following error isn't really legal. | |
3844 | * But we only get here if the client just explicitly | |
3845 | * destroyed the client. Surely it no longer cares what | |
3846 | * error it gets back on an operation for the dead | |
3847 | * client. | |
3848 | */ | |
bcecf1cc MJ |
3849 | goto out; |
3850 | ||
3851 | status = nfs_ok; | |
2a4317c5 | 3852 | nfsd4_client_record_create(cstate->session->se_client); |
362063a5 | 3853 | inc_reclaim_complete(cstate->session->se_client); |
bcecf1cc | 3854 | out: |
bcecf1cc | 3855 | return status; |
4dc6ec00 BF |
3856 | } |
3857 | ||
b37ad28b | 3858 | __be32 |
b591480b | 3859 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 3860 | union nfsd4_op_u *u) |
1da177e4 | 3861 | { |
eb69853d | 3862 | struct nfsd4_setclientid *setclid = &u->setclientid; |
a084daf5 | 3863 | struct xdr_netobj clname = setclid->se_name; |
1da177e4 | 3864 | nfs4_verifier clverifier = setclid->se_verf; |
3dbacee6 TM |
3865 | struct nfs4_client *conf, *new; |
3866 | struct nfs4_client *unconf = NULL; | |
b37ad28b | 3867 | __be32 status; |
c212cecf SK |
3868 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
3869 | ||
5cc40fd7 TM |
3870 | new = create_client(clname, rqstp, &clverifier); |
3871 | if (new == NULL) | |
3872 | return nfserr_jukebox; | |
63db4632 | 3873 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
3dbacee6 | 3874 | spin_lock(&nn->client_lock); |
382a62e7 | 3875 | conf = find_confirmed_client_by_name(&clname, nn); |
2b634821 | 3876 | if (conf && client_has_state(conf)) { |
63db4632 | 3877 | /* case 0: */ |
1da177e4 | 3878 | status = nfserr_clid_inuse; |
e203d506 BF |
3879 | if (clp_used_exchangeid(conf)) |
3880 | goto out; | |
026722c2 | 3881 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
3882 | char addr_str[INET6_ADDRSTRLEN]; |
3883 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
3884 | sizeof(addr_str)); | |
3885 | dprintk("NFSD: setclientid: string in use by client " | |
3886 | "at %s\n", addr_str); | |
1da177e4 LT |
3887 | goto out; |
3888 | } | |
1da177e4 | 3889 | } |
a99454aa | 3890 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
8f930711 | 3891 | if (unconf) |
3dbacee6 | 3892 | unhash_client_locked(unconf); |
41eb1670 | 3893 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
63db4632 | 3894 | /* case 1: probable callback update */ |
1da177e4 | 3895 | copy_clid(new, conf); |
41eb1670 KM |
3896 | gen_confirm(new, nn); |
3897 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ | |
e8a79fb1 | 3898 | ; |
8323c3b2 | 3899 | new->cl_minorversion = 0; |
6f3d772f | 3900 | gen_callback(new, setclid, rqstp); |
ac55fdc4 | 3901 | add_to_unconfirmed(new); |
1da177e4 LT |
3902 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
3903 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
3904 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
5cc40fd7 | 3905 | new = NULL; |
1da177e4 LT |
3906 | status = nfs_ok; |
3907 | out: | |
3dbacee6 | 3908 | spin_unlock(&nn->client_lock); |
5cc40fd7 TM |
3909 | if (new) |
3910 | free_client(new); | |
3dbacee6 TM |
3911 | if (unconf) |
3912 | expire_client(unconf); | |
1da177e4 LT |
3913 | return status; |
3914 | } | |
3915 | ||
3916 | ||
b37ad28b | 3917 | __be32 |
b591480b | 3918 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
eb69853d CH |
3919 | struct nfsd4_compound_state *cstate, |
3920 | union nfsd4_op_u *u) | |
1da177e4 | 3921 | { |
eb69853d CH |
3922 | struct nfsd4_setclientid_confirm *setclientid_confirm = |
3923 | &u->setclientid_confirm; | |
21ab45a4 | 3924 | struct nfs4_client *conf, *unconf; |
d20c11d8 | 3925 | struct nfs4_client *old = NULL; |
1da177e4 LT |
3926 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
3927 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 3928 | __be32 status; |
7f2210fa | 3929 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 3930 | |
2c142baa | 3931 | if (STALE_CLIENTID(clid, nn)) |
1da177e4 | 3932 | return nfserr_stale_clientid; |
21ab45a4 | 3933 | |
d20c11d8 | 3934 | spin_lock(&nn->client_lock); |
8daae4dc | 3935 | conf = find_confirmed_client(clid, false, nn); |
0a7ec377 | 3936 | unconf = find_unconfirmed_client(clid, false, nn); |
a186e767 | 3937 | /* |
8695b90a BF |
3938 | * We try hard to give out unique clientid's, so if we get an |
3939 | * attempt to confirm the same clientid with a different cred, | |
f984a7ce BF |
3940 | * the client may be buggy; this should never happen. |
3941 | * | |
3942 | * Nevertheless, RFC 7530 recommends INUSE for this case: | |
a186e767 | 3943 | */ |
f984a7ce | 3944 | status = nfserr_clid_inuse; |
8695b90a BF |
3945 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
3946 | goto out; | |
3947 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
3948 | goto out; | |
63db4632 | 3949 | /* cases below refer to rfc 3530 section 14.2.34: */ |
90d700b7 | 3950 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
7d22fc11 BF |
3951 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
3952 | /* case 2: probable retransmit */ | |
1da177e4 | 3953 | status = nfs_ok; |
7d22fc11 | 3954 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
90d700b7 BF |
3955 | status = nfserr_stale_clientid; |
3956 | goto out; | |
3957 | } | |
3958 | status = nfs_ok; | |
3959 | if (conf) { /* case 1: callback update */ | |
d20c11d8 JL |
3960 | old = unconf; |
3961 | unhash_client_locked(old); | |
8695b90a | 3962 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
90d700b7 | 3963 | } else { /* case 3: normal case; new or rebooted client */ |
d20c11d8 JL |
3964 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
3965 | if (old) { | |
2b634821 BF |
3966 | status = nfserr_clid_inuse; |
3967 | if (client_has_state(old) | |
3968 | && !same_creds(&unconf->cl_cred, | |
3969 | &old->cl_cred)) | |
3970 | goto out; | |
d20c11d8 | 3971 | status = mark_client_expired_locked(old); |
7abea1e8 JL |
3972 | if (status) { |
3973 | old = NULL; | |
221a6876 | 3974 | goto out; |
7abea1e8 | 3975 | } |
221a6876 | 3976 | } |
8695b90a | 3977 | move_to_confirmed(unconf); |
d20c11d8 | 3978 | conf = unconf; |
08e8987c | 3979 | } |
d20c11d8 JL |
3980 | get_client_locked(conf); |
3981 | spin_unlock(&nn->client_lock); | |
3982 | nfsd4_probe_callback(conf); | |
3983 | spin_lock(&nn->client_lock); | |
3984 | put_client_renew_locked(conf); | |
1da177e4 | 3985 | out: |
d20c11d8 JL |
3986 | spin_unlock(&nn->client_lock); |
3987 | if (old) | |
3988 | expire_client(old); | |
1da177e4 LT |
3989 | return status; |
3990 | } | |
3991 | ||
32513b40 BF |
3992 | static struct nfs4_file *nfsd4_alloc_file(void) |
3993 | { | |
3994 | return kmem_cache_alloc(file_slab, GFP_KERNEL); | |
3995 | } | |
3996 | ||
1da177e4 | 3997 | /* OPEN Share state helper functions */ |
5b095e99 JL |
3998 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
3999 | struct nfs4_file *fp) | |
1da177e4 | 4000 | { |
950e0118 TM |
4001 | lockdep_assert_held(&state_lock); |
4002 | ||
818a34eb | 4003 | refcount_set(&fp->fi_ref, 1); |
1d31a253 | 4004 | spin_lock_init(&fp->fi_lock); |
32513b40 BF |
4005 | INIT_LIST_HEAD(&fp->fi_stateids); |
4006 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8287f009 | 4007 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
e2cf80d7 | 4008 | fh_copy_shallow(&fp->fi_fhandle, fh); |
0c637be8 | 4009 | fp->fi_deleg_file = NULL; |
32513b40 | 4010 | fp->fi_had_conflict = false; |
baeb4ff0 | 4011 | fp->fi_share_deny = 0; |
32513b40 BF |
4012 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
4013 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
9cf514cc CH |
4014 | #ifdef CONFIG_NFSD_PNFS |
4015 | INIT_LIST_HEAD(&fp->fi_lo_states); | |
c5c707f9 | 4016 | atomic_set(&fp->fi_lo_recalls, 0); |
9cf514cc | 4017 | #endif |
5b095e99 | 4018 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
1da177e4 LT |
4019 | } |
4020 | ||
e8ff2a84 | 4021 | void |
1da177e4 LT |
4022 | nfsd4_free_slabs(void) |
4023 | { | |
9258a2d5 | 4024 | kmem_cache_destroy(client_slab); |
abf1135b CH |
4025 | kmem_cache_destroy(openowner_slab); |
4026 | kmem_cache_destroy(lockowner_slab); | |
4027 | kmem_cache_destroy(file_slab); | |
4028 | kmem_cache_destroy(stateid_slab); | |
4029 | kmem_cache_destroy(deleg_slab); | |
9258a2d5 | 4030 | kmem_cache_destroy(odstate_slab); |
e60d4398 | 4031 | } |
1da177e4 | 4032 | |
72083396 | 4033 | int |
e60d4398 N |
4034 | nfsd4_init_slabs(void) |
4035 | { | |
9258a2d5 JL |
4036 | client_slab = kmem_cache_create("nfsd4_clients", |
4037 | sizeof(struct nfs4_client), 0, 0, NULL); | |
4038 | if (client_slab == NULL) | |
4039 | goto out; | |
fe0750e5 BF |
4040 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
4041 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
4042 | if (openowner_slab == NULL) | |
9258a2d5 | 4043 | goto out_free_client_slab; |
fe0750e5 | 4044 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
3c40794b | 4045 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
fe0750e5 | 4046 | if (lockowner_slab == NULL) |
abf1135b | 4047 | goto out_free_openowner_slab; |
e60d4398 | 4048 | file_slab = kmem_cache_create("nfsd4_files", |
20c2df83 | 4049 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 | 4050 | if (file_slab == NULL) |
abf1135b | 4051 | goto out_free_lockowner_slab; |
5ac049ac | 4052 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
dcef0413 | 4053 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
5ac049ac | 4054 | if (stateid_slab == NULL) |
abf1135b | 4055 | goto out_free_file_slab; |
5b2d21c1 | 4056 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 4057 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 | 4058 | if (deleg_slab == NULL) |
abf1135b | 4059 | goto out_free_stateid_slab; |
8287f009 SB |
4060 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
4061 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); | |
4062 | if (odstate_slab == NULL) | |
4063 | goto out_free_deleg_slab; | |
e60d4398 | 4064 | return 0; |
abf1135b | 4065 | |
8287f009 SB |
4066 | out_free_deleg_slab: |
4067 | kmem_cache_destroy(deleg_slab); | |
abf1135b CH |
4068 | out_free_stateid_slab: |
4069 | kmem_cache_destroy(stateid_slab); | |
4070 | out_free_file_slab: | |
4071 | kmem_cache_destroy(file_slab); | |
4072 | out_free_lockowner_slab: | |
4073 | kmem_cache_destroy(lockowner_slab); | |
4074 | out_free_openowner_slab: | |
4075 | kmem_cache_destroy(openowner_slab); | |
9258a2d5 JL |
4076 | out_free_client_slab: |
4077 | kmem_cache_destroy(client_slab); | |
abf1135b | 4078 | out: |
e60d4398 N |
4079 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
4080 | return -ENOMEM; | |
1da177e4 LT |
4081 | } |
4082 | ||
ff194bd9 | 4083 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 4084 | { |
ff194bd9 BF |
4085 | rp->rp_status = nfserr_serverfault; |
4086 | rp->rp_buflen = 0; | |
4087 | rp->rp_buf = rp->rp_ibuf; | |
58fb12e6 JL |
4088 | mutex_init(&rp->rp_mutex); |
4089 | } | |
4090 | ||
4091 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, | |
4092 | struct nfs4_stateowner *so) | |
4093 | { | |
4094 | if (!nfsd4_has_session(cstate)) { | |
4095 | mutex_lock(&so->so_replay.rp_mutex); | |
b5971afa | 4096 | cstate->replay_owner = nfs4_get_stateowner(so); |
58fb12e6 JL |
4097 | } |
4098 | } | |
4099 | ||
4100 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) | |
4101 | { | |
4102 | struct nfs4_stateowner *so = cstate->replay_owner; | |
4103 | ||
4104 | if (so != NULL) { | |
4105 | cstate->replay_owner = NULL; | |
4106 | mutex_unlock(&so->so_replay.rp_mutex); | |
4107 | nfs4_put_stateowner(so); | |
4108 | } | |
1da177e4 LT |
4109 | } |
4110 | ||
fe0750e5 | 4111 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 4112 | { |
1da177e4 | 4113 | struct nfs4_stateowner *sop; |
1da177e4 | 4114 | |
fe0750e5 | 4115 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
4116 | if (!sop) |
4117 | return NULL; | |
4118 | ||
6f4859b8 | 4119 | xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); |
ff194bd9 | 4120 | if (!sop->so_owner.data) { |
fe0750e5 | 4121 | kmem_cache_free(slab, sop); |
1da177e4 | 4122 | return NULL; |
ff194bd9 | 4123 | } |
ff194bd9 | 4124 | |
ea1da636 | 4125 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 BF |
4126 | sop->so_client = clp; |
4127 | init_nfs4_replay(&sop->so_replay); | |
6b180f0b | 4128 | atomic_set(&sop->so_count, 1); |
ff194bd9 BF |
4129 | return sop; |
4130 | } | |
4131 | ||
fe0750e5 | 4132 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 | 4133 | { |
d4f0489f | 4134 | lockdep_assert_held(&clp->cl_lock); |
9b531137 | 4135 | |
d4f0489f TM |
4136 | list_add(&oo->oo_owner.so_strhash, |
4137 | &clp->cl_ownerstr_hashtbl[strhashval]); | |
fe0750e5 | 4138 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
ff194bd9 BF |
4139 | } |
4140 | ||
8f4b54c5 JL |
4141 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
4142 | { | |
d4f0489f | 4143 | unhash_openowner_locked(openowner(so)); |
8f4b54c5 JL |
4144 | } |
4145 | ||
6b180f0b JL |
4146 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
4147 | { | |
4148 | struct nfs4_openowner *oo = openowner(so); | |
4149 | ||
4150 | kmem_cache_free(openowner_slab, oo); | |
4151 | } | |
4152 | ||
4153 | static const struct nfs4_stateowner_operations openowner_ops = { | |
8f4b54c5 JL |
4154 | .so_unhash = nfs4_unhash_openowner, |
4155 | .so_free = nfs4_free_openowner, | |
6b180f0b JL |
4156 | }; |
4157 | ||
7fc0564e AE |
4158 | static struct nfs4_ol_stateid * |
4159 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4160 | { | |
4161 | struct nfs4_ol_stateid *local, *ret = NULL; | |
4162 | struct nfs4_openowner *oo = open->op_openowner; | |
4163 | ||
4164 | lockdep_assert_held(&fp->fi_lock); | |
4165 | ||
4166 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
4167 | /* ignore lock owners */ | |
4168 | if (local->st_stateowner->so_is_open_owner == 0) | |
4169 | continue; | |
15ca08d3 TM |
4170 | if (local->st_stateowner != &oo->oo_owner) |
4171 | continue; | |
4172 | if (local->st_stid.sc_type == NFS4_OPEN_STID) { | |
7fc0564e | 4173 | ret = local; |
a15dfcd5 | 4174 | refcount_inc(&ret->st_stid.sc_count); |
7fc0564e AE |
4175 | break; |
4176 | } | |
4177 | } | |
4178 | return ret; | |
4179 | } | |
4180 | ||
15ca08d3 TM |
4181 | static __be32 |
4182 | nfsd4_verify_open_stid(struct nfs4_stid *s) | |
4183 | { | |
4184 | __be32 ret = nfs_ok; | |
4185 | ||
4186 | switch (s->sc_type) { | |
4187 | default: | |
4188 | break; | |
4f176417 | 4189 | case 0: |
15ca08d3 TM |
4190 | case NFS4_CLOSED_STID: |
4191 | case NFS4_CLOSED_DELEG_STID: | |
4192 | ret = nfserr_bad_stateid; | |
4193 | break; | |
4194 | case NFS4_REVOKED_DELEG_STID: | |
4195 | ret = nfserr_deleg_revoked; | |
4196 | } | |
4197 | return ret; | |
4198 | } | |
4199 | ||
4200 | /* Lock the stateid st_mutex, and deal with races with CLOSE */ | |
4201 | static __be32 | |
4202 | nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) | |
4203 | { | |
4204 | __be32 ret; | |
4205 | ||
4f34bd05 | 4206 | mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); |
15ca08d3 TM |
4207 | ret = nfsd4_verify_open_stid(&stp->st_stid); |
4208 | if (ret != nfs_ok) | |
4209 | mutex_unlock(&stp->st_mutex); | |
4210 | return ret; | |
4211 | } | |
4212 | ||
4213 | static struct nfs4_ol_stateid * | |
4214 | nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) | |
4215 | { | |
4216 | struct nfs4_ol_stateid *stp; | |
4217 | for (;;) { | |
4218 | spin_lock(&fp->fi_lock); | |
4219 | stp = nfsd4_find_existing_open(fp, open); | |
4220 | spin_unlock(&fp->fi_lock); | |
4221 | if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) | |
4222 | break; | |
4223 | nfs4_put_stid(&stp->st_stid); | |
4224 | } | |
4225 | return stp; | |
4226 | } | |
4227 | ||
fe0750e5 | 4228 | static struct nfs4_openowner * |
13d6f66b | 4229 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
db24b3b4 JL |
4230 | struct nfsd4_compound_state *cstate) |
4231 | { | |
13d6f66b | 4232 | struct nfs4_client *clp = cstate->clp; |
7ffb5880 | 4233 | struct nfs4_openowner *oo, *ret; |
ff194bd9 | 4234 | |
fe0750e5 BF |
4235 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
4236 | if (!oo) | |
ff194bd9 | 4237 | return NULL; |
6b180f0b | 4238 | oo->oo_owner.so_ops = &openowner_ops; |
fe0750e5 BF |
4239 | oo->oo_owner.so_is_open_owner = 1; |
4240 | oo->oo_owner.so_seqid = open->op_seqid; | |
d3134b10 | 4241 | oo->oo_flags = 0; |
db24b3b4 JL |
4242 | if (nfsd4_has_session(cstate)) |
4243 | oo->oo_flags |= NFS4_OO_CONFIRMED; | |
fe0750e5 | 4244 | oo->oo_time = 0; |
38c387b5 | 4245 | oo->oo_last_closed_stid = NULL; |
fe0750e5 | 4246 | INIT_LIST_HEAD(&oo->oo_close_lru); |
d4f0489f TM |
4247 | spin_lock(&clp->cl_lock); |
4248 | ret = find_openstateowner_str_locked(strhashval, open, clp); | |
7ffb5880 TM |
4249 | if (ret == NULL) { |
4250 | hash_openowner(oo, clp, strhashval); | |
4251 | ret = oo; | |
4252 | } else | |
d50ffded KM |
4253 | nfs4_free_stateowner(&oo->oo_owner); |
4254 | ||
d4f0489f | 4255 | spin_unlock(&clp->cl_lock); |
c5952338 | 4256 | return ret; |
1da177e4 LT |
4257 | } |
4258 | ||
7fc0564e | 4259 | static struct nfs4_ol_stateid * |
8c7245ab | 4260 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
7fc0564e AE |
4261 | { |
4262 | ||
fe0750e5 | 4263 | struct nfs4_openowner *oo = open->op_openowner; |
7fc0564e | 4264 | struct nfs4_ol_stateid *retstp = NULL; |
8c7245ab | 4265 | struct nfs4_ol_stateid *stp; |
1da177e4 | 4266 | |
8c7245ab | 4267 | stp = open->op_stp; |
5cc1fb2a OD |
4268 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
4269 | mutex_init(&stp->st_mutex); | |
4f34bd05 | 4270 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
5cc1fb2a | 4271 | |
15ca08d3 | 4272 | retry: |
7fc0564e AE |
4273 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
4274 | spin_lock(&fp->fi_lock); | |
4275 | ||
4276 | retstp = nfsd4_find_existing_open(fp, open); | |
4277 | if (retstp) | |
4278 | goto out_unlock; | |
8c7245ab OD |
4279 | |
4280 | open->op_stp = NULL; | |
a15dfcd5 | 4281 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 4282 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
3c87b9b7 | 4283 | INIT_LIST_HEAD(&stp->st_locks); |
b5971afa | 4284 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
13cd2184 | 4285 | get_nfs4_file(fp); |
11b9164a | 4286 | stp->st_stid.sc_file = fp; |
1da177e4 LT |
4287 | stp->st_access_bmap = 0; |
4288 | stp->st_deny_bmap = 0; | |
4c4cd222 | 4289 | stp->st_openstp = NULL; |
1c755dc1 | 4290 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
1d31a253 | 4291 | list_add(&stp->st_perfile, &fp->fi_stateids); |
7fc0564e AE |
4292 | |
4293 | out_unlock: | |
1d31a253 | 4294 | spin_unlock(&fp->fi_lock); |
1c755dc1 | 4295 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
5cc1fb2a | 4296 | if (retstp) { |
15ca08d3 TM |
4297 | /* Handle races with CLOSE */ |
4298 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
4299 | nfs4_put_stid(&retstp->st_stid); | |
4300 | goto retry; | |
4301 | } | |
8c7245ab | 4302 | /* To keep mutex tracking happy */ |
5cc1fb2a | 4303 | mutex_unlock(&stp->st_mutex); |
8c7245ab | 4304 | stp = retstp; |
5cc1fb2a | 4305 | } |
8c7245ab | 4306 | return stp; |
1da177e4 LT |
4307 | } |
4308 | ||
d3134b10 JL |
4309 | /* |
4310 | * In the 4.0 case we need to keep the owners around a little while to handle | |
4311 | * CLOSE replay. We still do need to release any file access that is held by | |
4312 | * them before returning however. | |
4313 | */ | |
fd39ca9a | 4314 | static void |
d3134b10 | 4315 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
1da177e4 | 4316 | { |
217526e7 | 4317 | struct nfs4_ol_stateid *last; |
d3134b10 JL |
4318 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
4319 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, | |
4320 | nfsd_net_id); | |
73758fed | 4321 | |
fe0750e5 | 4322 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 4323 | |
b401be22 JL |
4324 | /* |
4325 | * We know that we hold one reference via nfsd4_close, and another | |
4326 | * "persistent" reference for the client. If the refcount is higher | |
4327 | * than 2, then there are still calls in progress that are using this | |
4328 | * stateid. We can't put the sc_file reference until they are finished. | |
4329 | * Wait for the refcount to drop to 2. Since it has been unhashed, | |
4330 | * there should be no danger of the refcount going back up again at | |
4331 | * this point. | |
4332 | */ | |
a15dfcd5 | 4333 | wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); |
b401be22 | 4334 | |
d3134b10 JL |
4335 | release_all_access(s); |
4336 | if (s->st_stid.sc_file) { | |
4337 | put_nfs4_file(s->st_stid.sc_file); | |
4338 | s->st_stid.sc_file = NULL; | |
4339 | } | |
217526e7 JL |
4340 | |
4341 | spin_lock(&nn->client_lock); | |
4342 | last = oo->oo_last_closed_stid; | |
d3134b10 | 4343 | oo->oo_last_closed_stid = s; |
73758fed | 4344 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
20b7d86f | 4345 | oo->oo_time = ktime_get_boottime_seconds(); |
217526e7 JL |
4346 | spin_unlock(&nn->client_lock); |
4347 | if (last) | |
4348 | nfs4_put_stid(&last->st_stid); | |
1da177e4 LT |
4349 | } |
4350 | ||
1da177e4 LT |
4351 | /* search file_hashtbl[] for file */ |
4352 | static struct nfs4_file * | |
5b095e99 | 4353 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
1da177e4 | 4354 | { |
1da177e4 LT |
4355 | struct nfs4_file *fp; |
4356 | ||
36a80491 MB |
4357 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, |
4358 | lockdep_is_held(&state_lock)) { | |
4d94c2ef | 4359 | if (fh_match(&fp->fi_fhandle, fh)) { |
818a34eb | 4360 | if (refcount_inc_not_zero(&fp->fi_ref)) |
5b095e99 | 4361 | return fp; |
13cd2184 | 4362 | } |
1da177e4 LT |
4363 | } |
4364 | return NULL; | |
4365 | } | |
4366 | ||
e6ba76e1 | 4367 | struct nfs4_file * |
ca943217 | 4368 | find_file(struct knfsd_fh *fh) |
950e0118 TM |
4369 | { |
4370 | struct nfs4_file *fp; | |
5b095e99 | 4371 | unsigned int hashval = file_hashval(fh); |
950e0118 | 4372 | |
5b095e99 JL |
4373 | rcu_read_lock(); |
4374 | fp = find_file_locked(fh, hashval); | |
4375 | rcu_read_unlock(); | |
950e0118 TM |
4376 | return fp; |
4377 | } | |
4378 | ||
4379 | static struct nfs4_file * | |
f9c00c3a | 4380 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
950e0118 TM |
4381 | { |
4382 | struct nfs4_file *fp; | |
5b095e99 JL |
4383 | unsigned int hashval = file_hashval(fh); |
4384 | ||
4385 | rcu_read_lock(); | |
4386 | fp = find_file_locked(fh, hashval); | |
4387 | rcu_read_unlock(); | |
4388 | if (fp) | |
4389 | return fp; | |
950e0118 TM |
4390 | |
4391 | spin_lock(&state_lock); | |
5b095e99 JL |
4392 | fp = find_file_locked(fh, hashval); |
4393 | if (likely(fp == NULL)) { | |
4394 | nfsd4_init_file(fh, hashval, new); | |
950e0118 TM |
4395 | fp = new; |
4396 | } | |
4397 | spin_unlock(&state_lock); | |
4398 | ||
4399 | return fp; | |
4400 | } | |
4401 | ||
1da177e4 LT |
4402 | /* |
4403 | * Called to check deny when READ with all zero stateid or | |
4404 | * WRITE with all zero or all one stateid | |
4405 | */ | |
b37ad28b | 4406 | static __be32 |
1da177e4 LT |
4407 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
4408 | { | |
1da177e4 | 4409 | struct nfs4_file *fp; |
baeb4ff0 | 4410 | __be32 ret = nfs_ok; |
1da177e4 | 4411 | |
ca943217 | 4412 | fp = find_file(¤t_fh->fh_handle); |
13cd2184 | 4413 | if (!fp) |
baeb4ff0 JL |
4414 | return ret; |
4415 | /* Check for conflicting share reservations */ | |
1d31a253 | 4416 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4417 | if (fp->fi_share_deny & deny_type) |
4418 | ret = nfserr_locked; | |
1d31a253 | 4419 | spin_unlock(&fp->fi_lock); |
13cd2184 N |
4420 | put_nfs4_file(fp); |
4421 | return ret; | |
1da177e4 LT |
4422 | } |
4423 | ||
0162ac2b | 4424 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
1da177e4 | 4425 | { |
0162ac2b | 4426 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
11b9164a TM |
4427 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
4428 | nfsd_net_id); | |
e8c69d17 | 4429 | |
11b9164a | 4430 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
f54fe962 | 4431 | |
dff1399f | 4432 | /* |
f54fe962 JL |
4433 | * We can't do this in nfsd_break_deleg_cb because it is |
4434 | * already holding inode->i_lock. | |
4435 | * | |
dff1399f JL |
4436 | * If the dl_time != 0, then we know that it has already been |
4437 | * queued for a lease break. Don't queue it again. | |
4438 | */ | |
f54fe962 | 4439 | spin_lock(&state_lock); |
dff1399f | 4440 | if (dp->dl_time == 0) { |
20b7d86f | 4441 | dp->dl_time = ktime_get_boottime_seconds(); |
02e1215f | 4442 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
dff1399f | 4443 | } |
02e1215f JL |
4444 | spin_unlock(&state_lock); |
4445 | } | |
1da177e4 | 4446 | |
0162ac2b CH |
4447 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
4448 | struct rpc_task *task) | |
4449 | { | |
4450 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4451 | ||
a457974f AE |
4452 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
4453 | return 1; | |
4454 | ||
0162ac2b CH |
4455 | switch (task->tk_status) { |
4456 | case 0: | |
4457 | return 1; | |
1c73b9d2 SM |
4458 | case -NFS4ERR_DELAY: |
4459 | rpc_delay(task, 2 * HZ); | |
4460 | return 0; | |
0162ac2b CH |
4461 | case -EBADHANDLE: |
4462 | case -NFS4ERR_BAD_STATEID: | |
4463 | /* | |
4464 | * Race: client probably got cb_recall before open reply | |
4465 | * granting delegation. | |
4466 | */ | |
4467 | if (dp->dl_retries--) { | |
4468 | rpc_delay(task, 2 * HZ); | |
4469 | return 0; | |
4470 | } | |
4471 | /*FALLTHRU*/ | |
4472 | default: | |
1c73b9d2 | 4473 | return 1; |
0162ac2b CH |
4474 | } |
4475 | } | |
4476 | ||
4477 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) | |
4478 | { | |
4479 | struct nfs4_delegation *dp = cb_to_delegation(cb); | |
4480 | ||
4481 | nfs4_put_stid(&dp->dl_stid); | |
4482 | } | |
4483 | ||
c4cb8974 | 4484 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
0162ac2b CH |
4485 | .prepare = nfsd4_cb_recall_prepare, |
4486 | .done = nfsd4_cb_recall_done, | |
4487 | .release = nfsd4_cb_recall_release, | |
4488 | }; | |
4489 | ||
02e1215f JL |
4490 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
4491 | { | |
4492 | /* | |
4493 | * We're assuming the state code never drops its reference | |
4494 | * without first removing the lease. Since we're in this lease | |
4a269efb BF |
4495 | * callback (and since the lease code is serialized by the |
4496 | * i_lock) we know the server hasn't removed the lease yet, and | |
4497 | * we know it's safe to take a reference. | |
02e1215f | 4498 | */ |
a15dfcd5 | 4499 | refcount_inc(&dp->dl_stid.sc_count); |
f0b5de1b | 4500 | nfsd4_run_cb(&dp->dl_recall); |
6b57d9c8 BF |
4501 | } |
4502 | ||
1c8c601a | 4503 | /* Called from break_lease() with i_lock held. */ |
4d01b7f5 JL |
4504 | static bool |
4505 | nfsd_break_deleg_cb(struct file_lock *fl) | |
6b57d9c8 | 4506 | { |
4d01b7f5 | 4507 | bool ret = false; |
653e514e BF |
4508 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
4509 | struct nfs4_file *fp = dp->dl_stid.sc_file; | |
6b57d9c8 | 4510 | |
0272e1fd BF |
4511 | /* |
4512 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 4513 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 4514 | * in time: |
0272e1fd BF |
4515 | */ |
4516 | fl->fl_break_time = 0; | |
1da177e4 | 4517 | |
02e1215f | 4518 | spin_lock(&fp->fi_lock); |
417c6629 | 4519 | fp->fi_had_conflict = true; |
353601e7 | 4520 | nfsd_break_one_deleg(dp); |
02e1215f | 4521 | spin_unlock(&fp->fi_lock); |
4d01b7f5 | 4522 | return ret; |
1da177e4 LT |
4523 | } |
4524 | ||
c45198ed | 4525 | static int |
7448cc37 JL |
4526 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
4527 | struct list_head *dispose) | |
1da177e4 LT |
4528 | { |
4529 | if (arg & F_UNLCK) | |
c45198ed | 4530 | return lease_modify(onlist, arg, dispose); |
1da177e4 LT |
4531 | else |
4532 | return -EAGAIN; | |
4533 | } | |
4534 | ||
7b021967 | 4535 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
4536 | .lm_break = nfsd_break_deleg_cb, |
4537 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
4538 | }; |
4539 | ||
7a8711c9 BF |
4540 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
4541 | { | |
4542 | if (nfsd4_has_session(cstate)) | |
4543 | return nfs_ok; | |
4544 | if (seqid == so->so_seqid - 1) | |
4545 | return nfserr_replay_me; | |
4546 | if (seqid == so->so_seqid) | |
4547 | return nfs_ok; | |
4548 | return nfserr_bad_seqid; | |
4549 | } | |
1da177e4 | 4550 | |
4b24ca7d JL |
4551 | static __be32 lookup_clientid(clientid_t *clid, |
4552 | struct nfsd4_compound_state *cstate, | |
b7342204 OK |
4553 | struct nfsd_net *nn, |
4554 | bool sessions) | |
4b24ca7d JL |
4555 | { |
4556 | struct nfs4_client *found; | |
4557 | ||
4558 | if (cstate->clp) { | |
4559 | found = cstate->clp; | |
4560 | if (!same_clid(&found->cl_clientid, clid)) | |
4561 | return nfserr_stale_clientid; | |
4562 | return nfs_ok; | |
4563 | } | |
4564 | ||
4565 | if (STALE_CLIENTID(clid, nn)) | |
4566 | return nfserr_stale_clientid; | |
4567 | ||
4568 | /* | |
4569 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one | |
4570 | * cached already then we know this is for is for v4.0 and "sessions" | |
4571 | * will be false. | |
4572 | */ | |
4573 | WARN_ON_ONCE(cstate->session); | |
3e339f96 | 4574 | spin_lock(&nn->client_lock); |
b7342204 | 4575 | found = find_confirmed_client(clid, sessions, nn); |
3e339f96 TM |
4576 | if (!found) { |
4577 | spin_unlock(&nn->client_lock); | |
4b24ca7d | 4578 | return nfserr_expired; |
3e339f96 | 4579 | } |
14ed14cc | 4580 | atomic_inc(&found->cl_rpc_users); |
3e339f96 | 4581 | spin_unlock(&nn->client_lock); |
4b24ca7d JL |
4582 | |
4583 | /* Cache the nfs4_client in cstate! */ | |
4584 | cstate->clp = found; | |
4b24ca7d JL |
4585 | return nfs_ok; |
4586 | } | |
4587 | ||
b37ad28b | 4588 | __be32 |
6668958f | 4589 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
3320fef1 | 4590 | struct nfsd4_open *open, struct nfsd_net *nn) |
1da177e4 | 4591 | { |
1da177e4 LT |
4592 | clientid_t *clientid = &open->op_clientid; |
4593 | struct nfs4_client *clp = NULL; | |
4594 | unsigned int strhashval; | |
fe0750e5 | 4595 | struct nfs4_openowner *oo = NULL; |
4cdc951b | 4596 | __be32 status; |
1da177e4 | 4597 | |
2c142baa | 4598 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
1da177e4 | 4599 | return nfserr_stale_clientid; |
32513b40 BF |
4600 | /* |
4601 | * In case we need it later, after we've already created the | |
4602 | * file and don't want to risk a further failure: | |
4603 | */ | |
4604 | open->op_file = nfsd4_alloc_file(); | |
4605 | if (open->op_file == NULL) | |
4606 | return nfserr_jukebox; | |
1da177e4 | 4607 | |
b7342204 | 4608 | status = lookup_clientid(clientid, cstate, nn, false); |
2d91e895 TM |
4609 | if (status) |
4610 | return status; | |
4611 | clp = cstate->clp; | |
4612 | ||
d4f0489f TM |
4613 | strhashval = ownerstr_hashval(&open->op_owner); |
4614 | oo = find_openstateowner_str(strhashval, open, clp); | |
fe0750e5 BF |
4615 | open->op_openowner = oo; |
4616 | if (!oo) { | |
bcf130f9 | 4617 | goto new_owner; |
1da177e4 | 4618 | } |
dad1c067 | 4619 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
0f442aa2 | 4620 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
4621 | release_openowner(oo); |
4622 | open->op_openowner = NULL; | |
bcf130f9 | 4623 | goto new_owner; |
0f442aa2 | 4624 | } |
4cdc951b BF |
4625 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
4626 | if (status) | |
4627 | return status; | |
4cdc951b | 4628 | goto alloc_stateid; |
bcf130f9 | 4629 | new_owner: |
13d6f66b | 4630 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
bcf130f9 BF |
4631 | if (oo == NULL) |
4632 | return nfserr_jukebox; | |
4633 | open->op_openowner = oo; | |
4cdc951b | 4634 | alloc_stateid: |
b49e084d | 4635 | open->op_stp = nfs4_alloc_open_stateid(clp); |
4cdc951b BF |
4636 | if (!open->op_stp) |
4637 | return nfserr_jukebox; | |
8287f009 SB |
4638 | |
4639 | if (nfsd4_has_session(cstate) && | |
4640 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { | |
4641 | open->op_odstate = alloc_clnt_odstate(clp); | |
4642 | if (!open->op_odstate) | |
4643 | return nfserr_jukebox; | |
4644 | } | |
4645 | ||
0f442aa2 | 4646 | return nfs_ok; |
1da177e4 LT |
4647 | } |
4648 | ||
b37ad28b | 4649 | static inline __be32 |
4a6e43e6 N |
4650 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
4651 | { | |
4652 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
4653 | return nfserr_openmode; | |
4654 | else | |
4655 | return nfs_ok; | |
4656 | } | |
4657 | ||
f459e453 | 4658 | static int share_access_to_flags(u32 share_access) |
52f4fb43 | 4659 | { |
f459e453 | 4660 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
52f4fb43 N |
4661 | } |
4662 | ||
38c2f4b1 | 4663 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
24a0111e | 4664 | { |
f459e453 | 4665 | struct nfs4_stid *ret; |
24a0111e | 4666 | |
95da1b3a AE |
4667 | ret = find_stateid_by_type(cl, s, |
4668 | NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); | |
f459e453 BF |
4669 | if (!ret) |
4670 | return NULL; | |
4671 | return delegstateid(ret); | |
24a0111e BF |
4672 | } |
4673 | ||
8b289b2c BF |
4674 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
4675 | { | |
4676 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || | |
4677 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; | |
4678 | } | |
4679 | ||
b37ad28b | 4680 | static __be32 |
41d22663 | 4681 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
567d9829 N |
4682 | struct nfs4_delegation **dp) |
4683 | { | |
4684 | int flags; | |
b37ad28b | 4685 | __be32 status = nfserr_bad_stateid; |
dcd94cc2 | 4686 | struct nfs4_delegation *deleg; |
567d9829 | 4687 | |
dcd94cc2 TM |
4688 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
4689 | if (deleg == NULL) | |
c44c5eeb | 4690 | goto out; |
95da1b3a AE |
4691 | if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { |
4692 | nfs4_put_stid(&deleg->dl_stid); | |
4693 | if (cl->cl_minorversion) | |
4694 | status = nfserr_deleg_revoked; | |
4695 | goto out; | |
4696 | } | |
24a0111e | 4697 | flags = share_access_to_flags(open->op_share_access); |
dcd94cc2 TM |
4698 | status = nfs4_check_delegmode(deleg, flags); |
4699 | if (status) { | |
4700 | nfs4_put_stid(&deleg->dl_stid); | |
4701 | goto out; | |
4702 | } | |
4703 | *dp = deleg; | |
c44c5eeb | 4704 | out: |
8b289b2c | 4705 | if (!nfsd4_is_deleg_cur(open)) |
c44c5eeb N |
4706 | return nfs_ok; |
4707 | if (status) | |
4708 | return status; | |
dad1c067 | 4709 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
c44c5eeb | 4710 | return nfs_ok; |
567d9829 N |
4711 | } |
4712 | ||
21fb4016 BF |
4713 | static inline int nfs4_access_to_access(u32 nfs4_access) |
4714 | { | |
4715 | int flags = 0; | |
4716 | ||
4717 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
4718 | flags |= NFSD_MAY_READ; | |
4719 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
4720 | flags |= NFSD_MAY_WRITE; | |
4721 | return flags; | |
4722 | } | |
4723 | ||
7e6a72e5 CH |
4724 | static inline __be32 |
4725 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
4726 | struct nfsd4_open *open) | |
4727 | { | |
4728 | struct iattr iattr = { | |
4729 | .ia_valid = ATTR_SIZE, | |
4730 | .ia_size = 0, | |
4731 | }; | |
4732 | if (!open->op_truncate) | |
4733 | return 0; | |
4734 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
4735 | return nfserr_inval; | |
2a1aa489 | 4736 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time64_t)0); |
7e6a72e5 CH |
4737 | } |
4738 | ||
0c12eaff | 4739 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
6eb3a1d0 JL |
4740 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
4741 | struct nfsd4_open *open) | |
f9d7562f | 4742 | { |
fd4f83fd | 4743 | struct nfsd_file *nf = NULL; |
f9d7562f | 4744 | __be32 status; |
0c12eaff CB |
4745 | int oflag = nfs4_access_to_omode(open->op_share_access); |
4746 | int access = nfs4_access_to_access(open->op_share_access); | |
baeb4ff0 | 4747 | unsigned char old_access_bmap, old_deny_bmap; |
0c12eaff | 4748 | |
de18643d | 4749 | spin_lock(&fp->fi_lock); |
baeb4ff0 JL |
4750 | |
4751 | /* | |
4752 | * Are we trying to set a deny mode that would conflict with | |
4753 | * current access? | |
4754 | */ | |
4755 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4756 | if (status != nfs_ok) { | |
4757 | spin_unlock(&fp->fi_lock); | |
4758 | goto out; | |
4759 | } | |
4760 | ||
4761 | /* set access to the file */ | |
4762 | status = nfs4_file_get_access(fp, open->op_share_access); | |
4763 | if (status != nfs_ok) { | |
4764 | spin_unlock(&fp->fi_lock); | |
4765 | goto out; | |
4766 | } | |
4767 | ||
4768 | /* Set access bits in stateid */ | |
4769 | old_access_bmap = stp->st_access_bmap; | |
4770 | set_access(open->op_share_access, stp); | |
4771 | ||
4772 | /* Set new deny mask */ | |
4773 | old_deny_bmap = stp->st_deny_bmap; | |
4774 | set_deny(open->op_share_deny, stp); | |
4775 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4776 | ||
f9d7562f | 4777 | if (!fp->fi_fds[oflag]) { |
de18643d | 4778 | spin_unlock(&fp->fi_lock); |
fd4f83fd | 4779 | status = nfsd_file_acquire(rqstp, cur_fh, access, &nf); |
f9d7562f | 4780 | if (status) |
baeb4ff0 | 4781 | goto out_put_access; |
de18643d TM |
4782 | spin_lock(&fp->fi_lock); |
4783 | if (!fp->fi_fds[oflag]) { | |
fd4f83fd JL |
4784 | fp->fi_fds[oflag] = nf; |
4785 | nf = NULL; | |
de18643d | 4786 | } |
f9d7562f | 4787 | } |
de18643d | 4788 | spin_unlock(&fp->fi_lock); |
fd4f83fd JL |
4789 | if (nf) |
4790 | nfsd_file_put(nf); | |
f9d7562f | 4791 | |
7e6a72e5 CH |
4792 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4793 | if (status) | |
4794 | goto out_put_access; | |
7e6a72e5 CH |
4795 | out: |
4796 | return status; | |
baeb4ff0 JL |
4797 | out_put_access: |
4798 | stp->st_access_bmap = old_access_bmap; | |
4799 | nfs4_file_put_access(fp, open->op_share_access); | |
4800 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); | |
4801 | goto out; | |
1da177e4 LT |
4802 | } |
4803 | ||
b37ad28b | 4804 | static __be32 |
dcef0413 | 4805 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 4806 | { |
b37ad28b | 4807 | __be32 status; |
6ac75368 | 4808 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
1da177e4 | 4809 | |
6eb3a1d0 | 4810 | if (!test_access(open->op_share_access, stp)) |
baeb4ff0 | 4811 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
7e6a72e5 | 4812 | |
baeb4ff0 JL |
4813 | /* test and set deny mode */ |
4814 | spin_lock(&fp->fi_lock); | |
4815 | status = nfs4_file_check_deny(fp, open->op_share_deny); | |
4816 | if (status == nfs_ok) { | |
baeb4ff0 JL |
4817 | set_deny(open->op_share_deny, stp); |
4818 | fp->fi_share_deny |= | |
4819 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); | |
4820 | } | |
4821 | spin_unlock(&fp->fi_lock); | |
4822 | ||
4823 | if (status != nfs_ok) | |
1da177e4 | 4824 | return status; |
1da177e4 | 4825 | |
baeb4ff0 JL |
4826 | status = nfsd4_truncate(rqstp, cur_fh, open); |
4827 | if (status != nfs_ok) | |
4828 | reset_union_bmap_deny(old_deny_bmap, stp); | |
4829 | return status; | |
4830 | } | |
1da177e4 | 4831 | |
14a24e99 BF |
4832 | /* Should we give out recallable state?: */ |
4833 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
4834 | { | |
4835 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
4836 | return true; | |
4837 | /* | |
4838 | * In the sessions case, since we don't have to establish a | |
4839 | * separate connection for callbacks, we assume it's OK | |
4840 | * until we hear otherwise: | |
4841 | */ | |
4842 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
4843 | } | |
4844 | ||
653e514e BF |
4845 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, |
4846 | int flag) | |
22d38c4c BF |
4847 | { |
4848 | struct file_lock *fl; | |
4849 | ||
4850 | fl = locks_alloc_lock(); | |
4851 | if (!fl) | |
4852 | return NULL; | |
22d38c4c | 4853 | fl->fl_lmops = &nfsd_lease_mng_ops; |
617588d5 | 4854 | fl->fl_flags = FL_DELEG; |
22d38c4c BF |
4855 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
4856 | fl->fl_end = OFFSET_MAX; | |
653e514e | 4857 | fl->fl_owner = (fl_owner_t)dp; |
22d38c4c | 4858 | fl->fl_pid = current->tgid; |
eb82dd39 | 4859 | fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; |
22d38c4c BF |
4860 | return fl; |
4861 | } | |
4862 | ||
0b26693c JL |
4863 | static struct nfs4_delegation * |
4864 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, | |
8287f009 | 4865 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
acfdf5c3 | 4866 | { |
68b18f52 | 4867 | int status = 0; |
0b26693c | 4868 | struct nfs4_delegation *dp; |
eb82dd39 | 4869 | struct nfsd_file *nf; |
353601e7 | 4870 | struct file_lock *fl; |
417c6629 | 4871 | |
353601e7 BF |
4872 | /* |
4873 | * The fi_had_conflict and nfs_get_existing_delegation checks | |
4874 | * here are just optimizations; we'll need to recheck them at | |
4875 | * the end: | |
4876 | */ | |
bf7bd3e9 | 4877 | if (fp->fi_had_conflict) |
0b26693c JL |
4878 | return ERR_PTR(-EAGAIN); |
4879 | ||
eb82dd39 JL |
4880 | nf = find_readable_file(fp); |
4881 | if (!nf) { | |
353601e7 BF |
4882 | /* We should always have a readable file here */ |
4883 | WARN_ON_ONCE(1); | |
4884 | return ERR_PTR(-EBADF); | |
4885 | } | |
34ed9872 AE |
4886 | spin_lock(&state_lock); |
4887 | spin_lock(&fp->fi_lock); | |
68b18f52 BF |
4888 | if (nfs4_delegation_exists(clp, fp)) |
4889 | status = -EAGAIN; | |
353601e7 | 4890 | else if (!fp->fi_deleg_file) { |
eb82dd39 | 4891 | fp->fi_deleg_file = nf; |
353601e7 BF |
4892 | /* increment early to prevent fi_deleg_file from being |
4893 | * cleared */ | |
4894 | fp->fi_delegees = 1; | |
eb82dd39 | 4895 | nf = NULL; |
353601e7 BF |
4896 | } else |
4897 | fp->fi_delegees++; | |
34ed9872 AE |
4898 | spin_unlock(&fp->fi_lock); |
4899 | spin_unlock(&state_lock); | |
eb82dd39 JL |
4900 | if (nf) |
4901 | nfsd_file_put(nf); | |
34ed9872 AE |
4902 | if (status) |
4903 | return ERR_PTR(status); | |
4904 | ||
353601e7 | 4905 | status = -ENOMEM; |
86d29b10 | 4906 | dp = alloc_init_deleg(clp, fp, fh, odstate); |
0b26693c | 4907 | if (!dp) |
353601e7 BF |
4908 | goto out_delegees; |
4909 | ||
4910 | fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); | |
4911 | if (!fl) | |
bd8d7250 | 4912 | goto out_clnt_odstate; |
353601e7 | 4913 | |
eb82dd39 | 4914 | status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); |
353601e7 BF |
4915 | if (fl) |
4916 | locks_free_lock(fl); | |
4917 | if (status) | |
4918 | goto out_clnt_odstate; | |
0b26693c | 4919 | |
417c6629 JL |
4920 | spin_lock(&state_lock); |
4921 | spin_lock(&fp->fi_lock); | |
353601e7 | 4922 | if (fp->fi_had_conflict) |
417c6629 | 4923 | status = -EAGAIN; |
353601e7 BF |
4924 | else |
4925 | status = hash_delegation_locked(dp, fp); | |
417c6629 | 4926 | spin_unlock(&fp->fi_lock); |
cdc97505 | 4927 | spin_unlock(&state_lock); |
353601e7 BF |
4928 | |
4929 | if (status) | |
692ad280 AE |
4930 | goto out_unlock; |
4931 | ||
0b26693c | 4932 | return dp; |
692ad280 | 4933 | out_unlock: |
eb82dd39 | 4934 | vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); |
353601e7 BF |
4935 | out_clnt_odstate: |
4936 | put_clnt_odstate(dp->dl_clnt_odstate); | |
353601e7 BF |
4937 | nfs4_put_stid(&dp->dl_stid); |
4938 | out_delegees: | |
4939 | put_deleg_file(fp); | |
4940 | return ERR_PTR(status); | |
edab9782 BF |
4941 | } |
4942 | ||
4aa8913c BH |
4943 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
4944 | { | |
4945 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
4946 | if (status == -EAGAIN) | |
4947 | open->op_why_no_deleg = WND4_CONTENTION; | |
4948 | else { | |
4949 | open->op_why_no_deleg = WND4_RESOURCE; | |
4950 | switch (open->op_deleg_want) { | |
4951 | case NFS4_SHARE_WANT_READ_DELEG: | |
4952 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
4953 | case NFS4_SHARE_WANT_ANY_DELEG: | |
4954 | break; | |
4955 | case NFS4_SHARE_WANT_CANCEL: | |
4956 | open->op_why_no_deleg = WND4_CANCELLED; | |
4957 | break; | |
4958 | case NFS4_SHARE_WANT_NO_DELEG: | |
063b0fb9 | 4959 | WARN_ON_ONCE(1); |
4aa8913c BH |
4960 | } |
4961 | } | |
4962 | } | |
4963 | ||
1da177e4 LT |
4964 | /* |
4965 | * Attempt to hand out a delegation. | |
99c41515 BF |
4966 | * |
4967 | * Note we don't support write delegations, and won't until the vfs has | |
4968 | * proper support for them. | |
1da177e4 LT |
4969 | */ |
4970 | static void | |
4cf59221 JL |
4971 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
4972 | struct nfs4_ol_stateid *stp) | |
1da177e4 LT |
4973 | { |
4974 | struct nfs4_delegation *dp; | |
4cf59221 JL |
4975 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
4976 | struct nfs4_client *clp = stp->st_stid.sc_client; | |
14a24e99 | 4977 | int cb_up; |
99c41515 | 4978 | int status = 0; |
1da177e4 | 4979 | |
fe0750e5 | 4980 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
7b190fec N |
4981 | open->op_recall = 0; |
4982 | switch (open->op_claim_type) { | |
4983 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 4984 | if (!cb_up) |
7b190fec | 4985 | open->op_recall = 1; |
99c41515 BF |
4986 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
4987 | goto out_no_deleg; | |
7b190fec N |
4988 | break; |
4989 | case NFS4_OPEN_CLAIM_NULL: | |
ed47b062 | 4990 | case NFS4_OPEN_CLAIM_FH: |
99c41515 BF |
4991 | /* |
4992 | * Let's not give out any delegations till everyone's | |
c87fb4a3 BF |
4993 | * had the chance to reclaim theirs, *and* until |
4994 | * NLM locks have all been reclaimed: | |
99c41515 | 4995 | */ |
4cf59221 | 4996 | if (locks_in_grace(clp->net)) |
99c41515 | 4997 | goto out_no_deleg; |
dad1c067 | 4998 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
99c41515 | 4999 | goto out_no_deleg; |
9a0590ae SD |
5000 | /* |
5001 | * Also, if the file was opened for write or | |
5002 | * create, there's a good chance the client's | |
5003 | * about to write to it, resulting in an | |
5004 | * immediate recall (since we don't support | |
5005 | * write delegations): | |
5006 | */ | |
7b190fec | 5007 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
99c41515 BF |
5008 | goto out_no_deleg; |
5009 | if (open->op_create == NFS4_OPEN_CREATE) | |
5010 | goto out_no_deleg; | |
7b190fec N |
5011 | break; |
5012 | default: | |
99c41515 | 5013 | goto out_no_deleg; |
7b190fec | 5014 | } |
8287f009 | 5015 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
0b26693c | 5016 | if (IS_ERR(dp)) |
dd239cc0 | 5017 | goto out_no_deleg; |
1da177e4 | 5018 | |
d5477a8d | 5019 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
1da177e4 | 5020 | |
8c10cbdb | 5021 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
d5477a8d | 5022 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
99c41515 | 5023 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
67cb1279 | 5024 | nfs4_put_stid(&dp->dl_stid); |
dd239cc0 | 5025 | return; |
dd239cc0 | 5026 | out_no_deleg: |
99c41515 BF |
5027 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
5028 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && | |
d08d32e6 | 5029 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
99c41515 | 5030 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
d08d32e6 BF |
5031 | open->op_recall = 1; |
5032 | } | |
99c41515 BF |
5033 | |
5034 | /* 4.1 client asking for a delegation? */ | |
5035 | if (open->op_deleg_want) | |
5036 | nfsd4_open_deleg_none_ext(open, status); | |
5037 | return; | |
1da177e4 LT |
5038 | } |
5039 | ||
e27f49c3 BH |
5040 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
5041 | struct nfs4_delegation *dp) | |
5042 | { | |
5043 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && | |
5044 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5045 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5046 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; | |
5047 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && | |
5048 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { | |
5049 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5050 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; | |
5051 | } | |
5052 | /* Otherwise the client must be confused wanting a delegation | |
5053 | * it already has, therefore we don't return | |
5054 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. | |
5055 | */ | |
5056 | } | |
5057 | ||
b37ad28b | 5058 | __be32 |
1da177e4 LT |
5059 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
5060 | { | |
6668958f | 5061 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
38c2f4b1 | 5062 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
1da177e4 | 5063 | struct nfs4_file *fp = NULL; |
dcef0413 | 5064 | struct nfs4_ol_stateid *stp = NULL; |
567d9829 | 5065 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 5066 | __be32 status; |
d8a1a000 | 5067 | bool new_stp = false; |
1da177e4 | 5068 | |
1da177e4 LT |
5069 | /* |
5070 | * Lookup file; if found, lookup stateid and check open request, | |
5071 | * and check for delegations in the process of being recalled. | |
5072 | * If not found, create the nfs4_file struct | |
5073 | */ | |
f9c00c3a | 5074 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
950e0118 | 5075 | if (fp != open->op_file) { |
41d22663 | 5076 | status = nfs4_check_deleg(cl, open, &dp); |
c44c5eeb N |
5077 | if (status) |
5078 | goto out; | |
15ca08d3 | 5079 | stp = nfsd4_find_and_lock_existing_open(fp, open); |
1da177e4 | 5080 | } else { |
950e0118 | 5081 | open->op_file = NULL; |
c44c5eeb | 5082 | status = nfserr_bad_stateid; |
8b289b2c | 5083 | if (nfsd4_is_deleg_cur(open)) |
c44c5eeb | 5084 | goto out; |
1da177e4 LT |
5085 | } |
5086 | ||
d8a1a000 TM |
5087 | if (!stp) { |
5088 | stp = init_open_stateid(fp, open); | |
5089 | if (!open->op_stp) | |
5090 | new_stp = true; | |
5091 | } | |
5092 | ||
1da177e4 LT |
5093 | /* |
5094 | * OPEN the file, or upgrade an existing OPEN. | |
5095 | * If truncate fails, the OPEN fails. | |
d8a1a000 TM |
5096 | * |
5097 | * stp is already locked. | |
1da177e4 | 5098 | */ |
d8a1a000 | 5099 | if (!new_stp) { |
1da177e4 | 5100 | /* Stateid was found, this is an OPEN upgrade */ |
f9d7562f | 5101 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
35a92fe8 | 5102 | if (status) { |
feb9dad5 | 5103 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5104 | goto out; |
35a92fe8 | 5105 | } |
1da177e4 | 5106 | } else { |
6eb3a1d0 JL |
5107 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
5108 | if (status) { | |
d8a1a000 | 5109 | stp->st_stid.sc_type = NFS4_CLOSED_STID; |
6eb3a1d0 | 5110 | release_open_stateid(stp); |
d8a1a000 | 5111 | mutex_unlock(&stp->st_mutex); |
6eb3a1d0 JL |
5112 | goto out; |
5113 | } | |
8287f009 SB |
5114 | |
5115 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, | |
5116 | open->op_odstate); | |
5117 | if (stp->st_clnt_odstate == open->op_odstate) | |
5118 | open->op_odstate = NULL; | |
1da177e4 | 5119 | } |
d8a1a000 | 5120 | |
9767feb2 | 5121 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
feb9dad5 | 5122 | mutex_unlock(&stp->st_mutex); |
1da177e4 | 5123 | |
d24433cd | 5124 | if (nfsd4_has_session(&resp->cstate)) { |
d24433cd BH |
5125 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
5126 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; | |
5127 | open->op_why_no_deleg = WND4_NOT_WANTED; | |
5128 | goto nodeleg; | |
5129 | } | |
5130 | } | |
5131 | ||
1da177e4 LT |
5132 | /* |
5133 | * Attempt to hand out a delegation. No error return, because the | |
5134 | * OPEN succeeds even if we fail. | |
5135 | */ | |
4cf59221 | 5136 | nfs4_open_delegation(current_fh, open, stp); |
d24433cd | 5137 | nodeleg: |
1da177e4 LT |
5138 | status = nfs_ok; |
5139 | ||
8c10cbdb | 5140 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
dcef0413 | 5141 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
1da177e4 | 5142 | out: |
d24433cd BH |
5143 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
5144 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && | |
e27f49c3 BH |
5145 | open->op_deleg_want) |
5146 | nfsd4_deleg_xgrade_none_ext(open, dp); | |
d24433cd | 5147 | |
13cd2184 N |
5148 | if (fp) |
5149 | put_nfs4_file(fp); | |
37515177 | 5150 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
87186022 | 5151 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
1da177e4 LT |
5152 | /* |
5153 | * To finish the open response, we just need to set the rflags. | |
5154 | */ | |
5155 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
19e4c347 JL |
5156 | if (nfsd4_has_session(&resp->cstate)) |
5157 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; | |
5158 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) | |
1da177e4 | 5159 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
19e4c347 | 5160 | |
dcd94cc2 TM |
5161 | if (dp) |
5162 | nfs4_put_stid(&dp->dl_stid); | |
d6f2bc5d TM |
5163 | if (stp) |
5164 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 LT |
5165 | |
5166 | return status; | |
5167 | } | |
5168 | ||
58fb12e6 | 5169 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
42297899 | 5170 | struct nfsd4_open *open) |
d29b20cd BF |
5171 | { |
5172 | if (open->op_openowner) { | |
d3134b10 JL |
5173 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
5174 | ||
5175 | nfsd4_cstate_assign_replay(cstate, so); | |
5176 | nfs4_put_stateowner(so); | |
d29b20cd | 5177 | } |
32513b40 | 5178 | if (open->op_file) |
5b095e99 | 5179 | kmem_cache_free(file_slab, open->op_file); |
4cdc951b | 5180 | if (open->op_stp) |
6011695d | 5181 | nfs4_put_stid(&open->op_stp->st_stid); |
8287f009 SB |
5182 | if (open->op_odstate) |
5183 | kmem_cache_free(odstate_slab, open->op_odstate); | |
d29b20cd BF |
5184 | } |
5185 | ||
b37ad28b | 5186 | __be32 |
b591480b | 5187 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5188 | union nfsd4_op_u *u) |
1da177e4 | 5189 | { |
eb69853d | 5190 | clientid_t *clid = &u->renew; |
1da177e4 | 5191 | struct nfs4_client *clp; |
b37ad28b | 5192 | __be32 status; |
7f2210fa | 5193 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5194 | |
1da177e4 LT |
5195 | dprintk("process_renew(%08x/%08x): starting\n", |
5196 | clid->cl_boot, clid->cl_id); | |
b7342204 | 5197 | status = lookup_clientid(clid, cstate, nn, false); |
9b2ef62b | 5198 | if (status) |
1da177e4 | 5199 | goto out; |
4b24ca7d | 5200 | clp = cstate->clp; |
1da177e4 | 5201 | status = nfserr_cb_path_down; |
ea1da636 | 5202 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 5203 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
5204 | goto out; |
5205 | status = nfs_ok; | |
5206 | out: | |
1da177e4 LT |
5207 | return status; |
5208 | } | |
5209 | ||
7f5ef2e9 | 5210 | void |
12760c66 | 5211 | nfsd4_end_grace(struct nfsd_net *nn) |
a76b4319 | 5212 | { |
33dcc481 | 5213 | /* do nothing if grace period already ended */ |
a51c84ed | 5214 | if (nn->grace_ended) |
33dcc481 JL |
5215 | return; |
5216 | ||
a51c84ed | 5217 | nn->grace_ended = true; |
70b28235 BF |
5218 | /* |
5219 | * If the server goes down again right now, an NFSv4 | |
5220 | * client will still be allowed to reclaim after it comes back up, | |
5221 | * even if it hasn't yet had a chance to reclaim state this time. | |
5222 | * | |
5223 | */ | |
919b8049 | 5224 | nfsd4_record_grace_done(nn); |
70b28235 BF |
5225 | /* |
5226 | * At this point, NFSv4 clients can still reclaim. But if the | |
5227 | * server crashes, any that have not yet reclaimed will be out | |
5228 | * of luck on the next boot. | |
5229 | * | |
5230 | * (NFSv4.1+ clients are considered to have reclaimed once they | |
5231 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to | |
5232 | * have reclaimed after their first OPEN.) | |
5233 | */ | |
5e1533c7 | 5234 | locks_end_grace(&nn->nfsd4_manager); |
70b28235 BF |
5235 | /* |
5236 | * At this point, and once lockd and/or any other containers | |
5237 | * exit their grace period, further reclaims will fail and | |
5238 | * regular locking can resume. | |
5239 | */ | |
a76b4319 N |
5240 | } |
5241 | ||
03f318ca BF |
5242 | /* |
5243 | * If we've waited a lease period but there are still clients trying to | |
5244 | * reclaim, wait a little longer to give them a chance to finish. | |
5245 | */ | |
5246 | static bool clients_still_reclaiming(struct nfsd_net *nn) | |
5247 | { | |
20b7d86f AB |
5248 | time64_t double_grace_period_end = nn->boot_time + |
5249 | 2 * nn->nfsd4_lease; | |
03f318ca | 5250 | |
362063a5 SM |
5251 | if (nn->track_reclaim_completes && |
5252 | atomic_read(&nn->nr_reclaim_complete) == | |
5253 | nn->reclaim_str_hashtbl_size) | |
5254 | return false; | |
03f318ca BF |
5255 | if (!nn->somebody_reclaimed) |
5256 | return false; | |
5257 | nn->somebody_reclaimed = false; | |
5258 | /* | |
5259 | * If we've given them *two* lease times to reclaim, and they're | |
5260 | * still not done, give up: | |
5261 | */ | |
20b7d86f | 5262 | if (ktime_get_boottime_seconds() > double_grace_period_end) |
03f318ca BF |
5263 | return false; |
5264 | return true; | |
5265 | } | |
5266 | ||
20b7d86f | 5267 | static time64_t |
09121281 | 5268 | nfs4_laundromat(struct nfsd_net *nn) |
1da177e4 LT |
5269 | { |
5270 | struct nfs4_client *clp; | |
fe0750e5 | 5271 | struct nfs4_openowner *oo; |
1da177e4 | 5272 | struct nfs4_delegation *dp; |
217526e7 | 5273 | struct nfs4_ol_stateid *stp; |
7919d0a2 | 5274 | struct nfsd4_blocked_lock *nbl; |
1da177e4 | 5275 | struct list_head *pos, *next, reaplist; |
20b7d86f AB |
5276 | time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease; |
5277 | time64_t t, new_timeo = nn->nfsd4_lease; | |
624322f1 OK |
5278 | struct nfs4_cpntf_state *cps; |
5279 | copy_stateid_t *cps_t; | |
5280 | int i; | |
1da177e4 | 5281 | |
1da177e4 | 5282 | dprintk("NFSD: laundromat service - starting\n"); |
03f318ca BF |
5283 | |
5284 | if (clients_still_reclaiming(nn)) { | |
5285 | new_timeo = 0; | |
5286 | goto out; | |
5287 | } | |
362063a5 | 5288 | dprintk("NFSD: end of grace period\n"); |
12760c66 | 5289 | nfsd4_end_grace(nn); |
36acb66b | 5290 | INIT_LIST_HEAD(&reaplist); |
624322f1 OK |
5291 | |
5292 | spin_lock(&nn->s2s_cp_lock); | |
5293 | idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { | |
5294 | cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); | |
5295 | if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID && | |
20b7d86f | 5296 | cps->cpntf_time > cutoff) |
624322f1 OK |
5297 | _free_cpntf_state_locked(nn, cps); |
5298 | } | |
5299 | spin_unlock(&nn->s2s_cp_lock); | |
5300 | ||
c9a49628 | 5301 | spin_lock(&nn->client_lock); |
5ed58bb2 | 5302 | list_for_each_safe(pos, next, &nn->client_lru) { |
1da177e4 | 5303 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
20b7d86f | 5304 | if (clp->cl_time > cutoff) { |
1da177e4 | 5305 | t = clp->cl_time - cutoff; |
a832e7ae | 5306 | new_timeo = min(new_timeo, t); |
1da177e4 LT |
5307 | break; |
5308 | } | |
221a6876 | 5309 | if (mark_client_expired_locked(clp)) { |
d7682988 BH |
5310 | dprintk("NFSD: client in use (clientid %08x)\n", |
5311 | clp->cl_clientid.cl_id); | |
5312 | continue; | |
5313 | } | |
4864af97 | 5314 | list_add(&clp->cl_lru, &reaplist); |
36acb66b | 5315 | } |
c9a49628 | 5316 | spin_unlock(&nn->client_lock); |
36acb66b BH |
5317 | list_for_each_safe(pos, next, &reaplist) { |
5318 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
5319 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
5320 | clp->cl_clientid.cl_id); | |
4864af97 | 5321 | list_del_init(&clp->cl_lru); |
1da177e4 LT |
5322 | expire_client(clp); |
5323 | } | |
cdc97505 | 5324 | spin_lock(&state_lock); |
e8c69d17 | 5325 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 5326 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
20b7d86f | 5327 | if (dp->dl_time > cutoff) { |
a832e7ae JL |
5328 | t = dp->dl_time - cutoff; |
5329 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
5330 | break; |
5331 | } | |
3fcbbd24 | 5332 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 5333 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 5334 | } |
cdc97505 | 5335 | spin_unlock(&state_lock); |
2d4a532d JL |
5336 | while (!list_empty(&reaplist)) { |
5337 | dp = list_first_entry(&reaplist, struct nfs4_delegation, | |
5338 | dl_recall_lru); | |
5339 | list_del_init(&dp->dl_recall_lru); | |
3bd64a5b | 5340 | revoke_delegation(dp); |
1da177e4 | 5341 | } |
217526e7 JL |
5342 | |
5343 | spin_lock(&nn->client_lock); | |
5344 | while (!list_empty(&nn->close_lru)) { | |
5345 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, | |
5346 | oo_close_lru); | |
20b7d86f | 5347 | if (oo->oo_time > cutoff) { |
a832e7ae JL |
5348 | t = oo->oo_time - cutoff; |
5349 | new_timeo = min(new_timeo, t); | |
1da177e4 LT |
5350 | break; |
5351 | } | |
217526e7 JL |
5352 | list_del_init(&oo->oo_close_lru); |
5353 | stp = oo->oo_last_closed_stid; | |
5354 | oo->oo_last_closed_stid = NULL; | |
5355 | spin_unlock(&nn->client_lock); | |
5356 | nfs4_put_stid(&stp->st_stid); | |
5357 | spin_lock(&nn->client_lock); | |
1da177e4 | 5358 | } |
217526e7 JL |
5359 | spin_unlock(&nn->client_lock); |
5360 | ||
7919d0a2 JL |
5361 | /* |
5362 | * It's possible for a client to try and acquire an already held lock | |
5363 | * that is being held for a long time, and then lose interest in it. | |
5364 | * So, we clean out any un-revisited request after a lease period | |
5365 | * under the assumption that the client is no longer interested. | |
5366 | * | |
5367 | * RFC5661, sec. 9.6 states that the client must not rely on getting | |
5368 | * notifications and must continue to poll for locks, even when the | |
5369 | * server supports them. Thus this shouldn't lead to clients blocking | |
5370 | * indefinitely once the lock does become free. | |
5371 | */ | |
5372 | BUG_ON(!list_empty(&reaplist)); | |
0cc11a61 | 5373 | spin_lock(&nn->blocked_locks_lock); |
7919d0a2 JL |
5374 | while (!list_empty(&nn->blocked_locks_lru)) { |
5375 | nbl = list_first_entry(&nn->blocked_locks_lru, | |
5376 | struct nfsd4_blocked_lock, nbl_lru); | |
20b7d86f | 5377 | if (nbl->nbl_time > cutoff) { |
7919d0a2 JL |
5378 | t = nbl->nbl_time - cutoff; |
5379 | new_timeo = min(new_timeo, t); | |
5380 | break; | |
5381 | } | |
5382 | list_move(&nbl->nbl_lru, &reaplist); | |
5383 | list_del_init(&nbl->nbl_list); | |
5384 | } | |
0cc11a61 | 5385 | spin_unlock(&nn->blocked_locks_lock); |
7919d0a2 JL |
5386 | |
5387 | while (!list_empty(&reaplist)) { | |
64ebe124 | 5388 | nbl = list_first_entry(&reaplist, |
7919d0a2 JL |
5389 | struct nfsd4_blocked_lock, nbl_lru); |
5390 | list_del_init(&nbl->nbl_lru); | |
7919d0a2 JL |
5391 | free_blocked_lock(nbl); |
5392 | } | |
03f318ca | 5393 | out: |
20b7d86f | 5394 | new_timeo = max_t(time64_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
a832e7ae | 5395 | return new_timeo; |
1da177e4 LT |
5396 | } |
5397 | ||
a254b246 HH |
5398 | static struct workqueue_struct *laundry_wq; |
5399 | static void laundromat_main(struct work_struct *); | |
a254b246 HH |
5400 | |
5401 | static void | |
09121281 | 5402 | laundromat_main(struct work_struct *laundry) |
1da177e4 | 5403 | { |
20b7d86f | 5404 | time64_t t; |
2e55f3ab | 5405 | struct delayed_work *dwork = to_delayed_work(laundry); |
09121281 SK |
5406 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
5407 | laundromat_work); | |
1da177e4 | 5408 | |
09121281 | 5409 | t = nfs4_laundromat(nn); |
20b7d86f | 5410 | dprintk("NFSD: laundromat_main - sleeping for %lld seconds\n", t); |
09121281 | 5411 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
1da177e4 LT |
5412 | } |
5413 | ||
8fcd461d | 5414 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
1da177e4 | 5415 | { |
8fcd461d | 5416 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
f7a4d872 BF |
5417 | return nfserr_bad_stateid; |
5418 | return nfs_ok; | |
1da177e4 LT |
5419 | } |
5420 | ||
1da177e4 | 5421 | static inline int |
82c5ff1b | 5422 | access_permit_read(struct nfs4_ol_stateid *stp) |
1da177e4 | 5423 | { |
82c5ff1b JL |
5424 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
5425 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || | |
5426 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); | |
1da177e4 LT |
5427 | } |
5428 | ||
5429 | static inline int | |
82c5ff1b | 5430 | access_permit_write(struct nfs4_ol_stateid *stp) |
1da177e4 | 5431 | { |
82c5ff1b JL |
5432 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
5433 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); | |
1da177e4 LT |
5434 | } |
5435 | ||
5436 | static | |
dcef0413 | 5437 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
1da177e4 | 5438 | { |
b37ad28b | 5439 | __be32 status = nfserr_openmode; |
1da177e4 | 5440 | |
02921914 BF |
5441 | /* For lock stateid's, we test the parent open, not the lock: */ |
5442 | if (stp->st_openstp) | |
5443 | stp = stp->st_openstp; | |
82c5ff1b | 5444 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
1da177e4 | 5445 | goto out; |
82c5ff1b | 5446 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
1da177e4 LT |
5447 | goto out; |
5448 | status = nfs_ok; | |
5449 | out: | |
5450 | return status; | |
5451 | } | |
5452 | ||
b37ad28b | 5453 | static inline __be32 |
5ccb0066 | 5454 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
1da177e4 | 5455 | { |
203a8c8e | 5456 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 5457 | return nfs_ok; |
c87fb4a3 | 5458 | else if (opens_in_grace(net)) { |
25985edc | 5459 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
5460 | * conflicting state; so we must wait out the grace period. */ |
5461 | return nfserr_grace; | |
5462 | } else if (flags & WR_STATE) | |
5463 | return nfs4_share_conflict(current_fh, | |
5464 | NFS4_SHARE_DENY_WRITE); | |
5465 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
5466 | return nfs4_share_conflict(current_fh, | |
5467 | NFS4_SHARE_DENY_READ); | |
5468 | } | |
5469 | ||
5470 | /* | |
5471 | * Allow READ/WRITE during grace period on recovered state only for files | |
5472 | * that are not able to provide mandatory locking. | |
5473 | */ | |
5474 | static inline int | |
5ccb0066 | 5475 | grace_disallows_io(struct net *net, struct inode *inode) |
1da177e4 | 5476 | { |
c87fb4a3 | 5477 | return opens_in_grace(net) && mandatory_lock(inode); |
1da177e4 LT |
5478 | } |
5479 | ||
57b7b43b | 5480 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 5481 | { |
6668958f AA |
5482 | /* |
5483 | * When sessions are used the stateid generation number is ignored | |
5484 | * when it is zero. | |
5485 | */ | |
28dde241 | 5486 | if (has_session && in->si_generation == 0) |
81b82965 BF |
5487 | return nfs_ok; |
5488 | ||
5489 | if (in->si_generation == ref->si_generation) | |
5490 | return nfs_ok; | |
6668958f | 5491 | |
0836f587 | 5492 | /* If the client sends us a stateid from the future, it's buggy: */ |
14b7f4a1 | 5493 | if (nfsd4_stateid_generation_after(in, ref)) |
0836f587 BF |
5494 | return nfserr_bad_stateid; |
5495 | /* | |
81b82965 BF |
5496 | * However, we could see a stateid from the past, even from a |
5497 | * non-buggy client. For example, if the client sends a lock | |
5498 | * while some IO is outstanding, the lock may bump si_generation | |
5499 | * while the IO is still in flight. The client could avoid that | |
5500 | * situation by waiting for responses on all the IO requests, | |
5501 | * but better performance may result in retrying IO that | |
5502 | * receives an old_stateid error if requests are rarely | |
5503 | * reordered in flight: | |
0836f587 | 5504 | */ |
81b82965 | 5505 | return nfserr_old_stateid; |
0836f587 BF |
5506 | } |
5507 | ||
03da3169 TM |
5508 | static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) |
5509 | { | |
5510 | __be32 ret; | |
5511 | ||
5512 | spin_lock(&s->sc_lock); | |
5513 | ret = nfsd4_verify_open_stid(s); | |
5514 | if (ret == nfs_ok) | |
5515 | ret = check_stateid_generation(in, &s->sc_stateid, has_session); | |
5516 | spin_unlock(&s->sc_lock); | |
5517 | return ret; | |
5518 | } | |
5519 | ||
ebe9cb3b CH |
5520 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
5521 | { | |
5522 | if (ols->st_stateowner->so_is_open_owner && | |
5523 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) | |
5524 | return nfserr_bad_stateid; | |
5525 | return nfs_ok; | |
5526 | } | |
5527 | ||
7df302f7 | 5528 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
17456804 | 5529 | { |
97b7e3b6 | 5530 | struct nfs4_stid *s; |
1af71cc8 | 5531 | __be32 status = nfserr_bad_stateid; |
17456804 | 5532 | |
ae254dac AE |
5533 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5534 | CLOSE_STATEID(stateid)) | |
1af71cc8 | 5535 | return status; |
663e36f0 | 5536 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) |
1af71cc8 | 5537 | return status; |
1af71cc8 JL |
5538 | spin_lock(&cl->cl_lock); |
5539 | s = find_stateid_locked(cl, stateid); | |
97b7e3b6 | 5540 | if (!s) |
1af71cc8 | 5541 | goto out_unlock; |
03da3169 | 5542 | status = nfsd4_stid_check_stateid_generation(stateid, s, 1); |
17456804 | 5543 | if (status) |
1af71cc8 | 5544 | goto out_unlock; |
23340032 BF |
5545 | switch (s->sc_type) { |
5546 | case NFS4_DELEG_STID: | |
1af71cc8 JL |
5547 | status = nfs_ok; |
5548 | break; | |
3bd64a5b | 5549 | case NFS4_REVOKED_DELEG_STID: |
1af71cc8 JL |
5550 | status = nfserr_deleg_revoked; |
5551 | break; | |
23340032 BF |
5552 | case NFS4_OPEN_STID: |
5553 | case NFS4_LOCK_STID: | |
ebe9cb3b | 5554 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
1af71cc8 | 5555 | break; |
23340032 BF |
5556 | default: |
5557 | printk("unknown stateid type %x\n", s->sc_type); | |
b0fc29d6 | 5558 | /* Fallthrough */ |
23340032 | 5559 | case NFS4_CLOSED_STID: |
b0fc29d6 | 5560 | case NFS4_CLOSED_DELEG_STID: |
1af71cc8 | 5561 | status = nfserr_bad_stateid; |
23340032 | 5562 | } |
1af71cc8 JL |
5563 | out_unlock: |
5564 | spin_unlock(&cl->cl_lock); | |
5565 | return status; | |
17456804 BS |
5566 | } |
5567 | ||
cd61c522 | 5568 | __be32 |
2dd6e458 TM |
5569 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
5570 | stateid_t *stateid, unsigned char typemask, | |
5571 | struct nfs4_stid **s, struct nfsd_net *nn) | |
38c2f4b1 | 5572 | { |
0eb6f20a | 5573 | __be32 status; |
95da1b3a AE |
5574 | bool return_revoked = false; |
5575 | ||
5576 | /* | |
5577 | * only return revoked delegations if explicitly asked. | |
5578 | * otherwise we report revoked or bad_stateid status. | |
5579 | */ | |
5580 | if (typemask & NFS4_REVOKED_DELEG_STID) | |
5581 | return_revoked = true; | |
5582 | else if (typemask & NFS4_DELEG_STID) | |
5583 | typemask |= NFS4_REVOKED_DELEG_STID; | |
38c2f4b1 | 5584 | |
ae254dac AE |
5585 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || |
5586 | CLOSE_STATEID(stateid)) | |
38c2f4b1 | 5587 | return nfserr_bad_stateid; |
b7342204 OK |
5588 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn, |
5589 | false); | |
a8a7c677 | 5590 | if (status == nfserr_stale_clientid) { |
4b24ca7d | 5591 | if (cstate->session) |
a8a7c677 | 5592 | return nfserr_bad_stateid; |
38c2f4b1 | 5593 | return nfserr_stale_stateid; |
a8a7c677 | 5594 | } |
0eb6f20a BF |
5595 | if (status) |
5596 | return status; | |
4b24ca7d | 5597 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
38c2f4b1 BF |
5598 | if (!*s) |
5599 | return nfserr_bad_stateid; | |
95da1b3a AE |
5600 | if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { |
5601 | nfs4_put_stid(*s); | |
5602 | if (cstate->minorversion) | |
5603 | return nfserr_deleg_revoked; | |
5604 | return nfserr_bad_stateid; | |
5605 | } | |
38c2f4b1 | 5606 | return nfs_ok; |
38c2f4b1 BF |
5607 | } |
5608 | ||
eb82dd39 | 5609 | static struct nfsd_file * |
a0649b2d CH |
5610 | nfs4_find_file(struct nfs4_stid *s, int flags) |
5611 | { | |
af90f707 CH |
5612 | if (!s) |
5613 | return NULL; | |
5614 | ||
a0649b2d CH |
5615 | switch (s->sc_type) { |
5616 | case NFS4_DELEG_STID: | |
5617 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) | |
5618 | return NULL; | |
eb82dd39 | 5619 | return nfsd_file_get(s->sc_file->fi_deleg_file); |
a0649b2d CH |
5620 | case NFS4_OPEN_STID: |
5621 | case NFS4_LOCK_STID: | |
5622 | if (flags & RD_STATE) | |
5623 | return find_readable_file(s->sc_file); | |
5624 | else | |
5625 | return find_writeable_file(s->sc_file); | |
5626 | break; | |
5627 | } | |
5628 | ||
5629 | return NULL; | |
5630 | } | |
5631 | ||
5632 | static __be32 | |
d8836f77 | 5633 | nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) |
a0649b2d CH |
5634 | { |
5635 | __be32 status; | |
5636 | ||
a0649b2d CH |
5637 | status = nfsd4_check_openowner_confirmed(ols); |
5638 | if (status) | |
5639 | return status; | |
5640 | return nfs4_check_openmode(ols, flags); | |
5641 | } | |
5642 | ||
af90f707 CH |
5643 | static __be32 |
5644 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, | |
5c4583b2 | 5645 | struct nfsd_file **nfp, int flags) |
af90f707 CH |
5646 | { |
5647 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; | |
eb82dd39 | 5648 | struct nfsd_file *nf; |
af90f707 CH |
5649 | __be32 status; |
5650 | ||
eb82dd39 JL |
5651 | nf = nfs4_find_file(s, flags); |
5652 | if (nf) { | |
af90f707 CH |
5653 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
5654 | acc | NFSD_MAY_OWNER_OVERRIDE); | |
5c4583b2 JL |
5655 | if (status) { |
5656 | nfsd_file_put(nf); | |
eb82dd39 | 5657 | goto out; |
5c4583b2 | 5658 | } |
af90f707 | 5659 | } else { |
eb82dd39 | 5660 | status = nfsd_file_acquire(rqstp, fhp, acc, &nf); |
af90f707 CH |
5661 | if (status) |
5662 | return status; | |
af90f707 | 5663 | } |
5c4583b2 | 5664 | *nfp = nf; |
eb82dd39 | 5665 | out: |
eb82dd39 | 5666 | return status; |
af90f707 | 5667 | } |
624322f1 OK |
5668 | static void |
5669 | _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
5670 | { | |
5671 | WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID); | |
5672 | if (!refcount_dec_and_test(&cps->cp_stateid.sc_count)) | |
5673 | return; | |
5674 | list_del(&cps->cp_list); | |
5675 | idr_remove(&nn->s2s_cp_stateids, | |
5676 | cps->cp_stateid.stid.si_opaque.so_id); | |
5677 | kfree(cps); | |
5678 | } | |
b7342204 OK |
5679 | /* |
5680 | * A READ from an inter server to server COPY will have a | |
5681 | * copy stateid. Look up the copy notify stateid from the | |
5682 | * idr structure and take a reference on it. | |
5683 | */ | |
ce0887ac OK |
5684 | __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, |
5685 | struct nfs4_client *clp, | |
5686 | struct nfs4_cpntf_state **cps) | |
b7342204 OK |
5687 | { |
5688 | copy_stateid_t *cps_t; | |
5689 | struct nfs4_cpntf_state *state = NULL; | |
5690 | ||
5691 | if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) | |
5692 | return nfserr_bad_stateid; | |
5693 | spin_lock(&nn->s2s_cp_lock); | |
5694 | cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); | |
5695 | if (cps_t) { | |
5696 | state = container_of(cps_t, struct nfs4_cpntf_state, | |
5697 | cp_stateid); | |
5277a79e DC |
5698 | if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) { |
5699 | state = NULL; | |
5700 | goto unlock; | |
5701 | } | |
ce0887ac OK |
5702 | if (!clp) |
5703 | refcount_inc(&state->cp_stateid.sc_count); | |
5704 | else | |
5705 | _free_cpntf_state_locked(nn, state); | |
b7342204 | 5706 | } |
5277a79e | 5707 | unlock: |
b7342204 OK |
5708 | spin_unlock(&nn->s2s_cp_lock); |
5709 | if (!state) | |
5710 | return nfserr_bad_stateid; | |
ce0887ac OK |
5711 | if (!clp && state) |
5712 | *cps = state; | |
b7342204 OK |
5713 | return 0; |
5714 | } | |
5715 | ||
5716 | static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, | |
5717 | struct nfs4_stid **stid) | |
5718 | { | |
5719 | __be32 status; | |
5720 | struct nfs4_cpntf_state *cps = NULL; | |
5721 | struct nfsd4_compound_state cstate; | |
5722 | ||
ce0887ac | 5723 | status = manage_cpntf_state(nn, st, NULL, &cps); |
b7342204 OK |
5724 | if (status) |
5725 | return status; | |
5726 | ||
20b7d86f | 5727 | cps->cpntf_time = ktime_get_boottime_seconds(); |
b7342204 OK |
5728 | memset(&cstate, 0, sizeof(cstate)); |
5729 | status = lookup_clientid(&cps->cp_p_clid, &cstate, nn, true); | |
5730 | if (status) | |
5731 | goto out; | |
5732 | status = nfsd4_lookup_stateid(&cstate, &cps->cp_p_stateid, | |
5733 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, | |
5734 | stid, nn); | |
5735 | put_client_renew(cstate.clp); | |
5736 | out: | |
5737 | nfs4_put_cpntf_state(nn, cps); | |
5738 | return status; | |
5739 | } | |
624322f1 OK |
5740 | |
5741 | void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) | |
5742 | { | |
5743 | spin_lock(&nn->s2s_cp_lock); | |
5744 | _free_cpntf_state_locked(nn, cps); | |
5745 | spin_unlock(&nn->s2s_cp_lock); | |
5746 | } | |
af90f707 | 5747 | |
1da177e4 | 5748 | /* |
a0649b2d CH |
5749 | * Checks for stateid operations |
5750 | */ | |
b37ad28b | 5751 | __be32 |
af90f707 | 5752 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
aa0d6aed | 5753 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
624322f1 OK |
5754 | stateid_t *stateid, int flags, struct nfsd_file **nfp, |
5755 | struct nfs4_stid **cstid) | |
1da177e4 | 5756 | { |
a0649b2d | 5757 | struct inode *ino = d_inode(fhp->fh_dentry); |
af90f707 | 5758 | struct net *net = SVC_NET(rqstp); |
3320fef1 | 5759 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
af90f707 | 5760 | struct nfs4_stid *s = NULL; |
b37ad28b | 5761 | __be32 status; |
1da177e4 | 5762 | |
5c4583b2 JL |
5763 | if (nfp) |
5764 | *nfp = NULL; | |
1da177e4 | 5765 | |
5ccb0066 | 5766 | if (grace_disallows_io(net, ino)) |
1da177e4 LT |
5767 | return nfserr_grace; |
5768 | ||
af90f707 CH |
5769 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
5770 | status = check_special_stateids(net, fhp, stateid, flags); | |
5771 | goto done; | |
5772 | } | |
1da177e4 | 5773 | |
2dd6e458 | 5774 | status = nfsd4_lookup_stateid(cstate, stateid, |
db24b3b4 | 5775 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
2dd6e458 | 5776 | &s, nn); |
b7342204 OK |
5777 | if (status == nfserr_bad_stateid) |
5778 | status = find_cpntf_state(nn, stateid, &s); | |
38c2f4b1 | 5779 | if (status) |
c2d1d6a8 | 5780 | return status; |
03da3169 | 5781 | status = nfsd4_stid_check_stateid_generation(stateid, s, |
a0649b2d | 5782 | nfsd4_has_session(cstate)); |
69064a27 BF |
5783 | if (status) |
5784 | goto out; | |
a0649b2d | 5785 | |
f7a4d872 BF |
5786 | switch (s->sc_type) { |
5787 | case NFS4_DELEG_STID: | |
a0649b2d | 5788 | status = nfs4_check_delegmode(delegstateid(s), flags); |
f7a4d872 BF |
5789 | break; |
5790 | case NFS4_OPEN_STID: | |
5791 | case NFS4_LOCK_STID: | |
d8836f77 | 5792 | status = nfs4_check_olstateid(openlockstateid(s), flags); |
f7a4d872 BF |
5793 | break; |
5794 | default: | |
14bcab1a | 5795 | status = nfserr_bad_stateid; |
a0649b2d CH |
5796 | break; |
5797 | } | |
8fcd461d JL |
5798 | if (status) |
5799 | goto out; | |
5800 | status = nfs4_check_fh(fhp, s); | |
a0649b2d | 5801 | |
af90f707 | 5802 | done: |
5c4583b2 JL |
5803 | if (status == nfs_ok && nfp) |
5804 | status = nfs4_check_file(rqstp, fhp, s, nfp, flags); | |
1da177e4 | 5805 | out: |
624322f1 OK |
5806 | if (s) { |
5807 | if (!status && cstid) | |
5808 | *cstid = s; | |
5809 | else | |
5810 | nfs4_put_stid(s); | |
5811 | } | |
1da177e4 LT |
5812 | return status; |
5813 | } | |
5814 | ||
17456804 BS |
5815 | /* |
5816 | * Test if the stateid is valid | |
5817 | */ | |
5818 | __be32 | |
5819 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5820 | union nfsd4_op_u *u) |
17456804 | 5821 | { |
eb69853d | 5822 | struct nfsd4_test_stateid *test_stateid = &u->test_stateid; |
03cfb420 BS |
5823 | struct nfsd4_test_stateid_id *stateid; |
5824 | struct nfs4_client *cl = cstate->session->se_client; | |
5825 | ||
03cfb420 | 5826 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
7df302f7 CL |
5827 | stateid->ts_id_status = |
5828 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); | |
03cfb420 | 5829 | |
17456804 BS |
5830 | return nfs_ok; |
5831 | } | |
5832 | ||
42691398 CL |
5833 | static __be32 |
5834 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) | |
5835 | { | |
5836 | struct nfs4_ol_stateid *stp = openlockstateid(s); | |
5837 | __be32 ret; | |
5838 | ||
659aefb6 TM |
5839 | ret = nfsd4_lock_ol_stateid(stp); |
5840 | if (ret) | |
5841 | goto out_put_stid; | |
42691398 CL |
5842 | |
5843 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); | |
5844 | if (ret) | |
5845 | goto out; | |
5846 | ||
5847 | ret = nfserr_locks_held; | |
5848 | if (check_for_locks(stp->st_stid.sc_file, | |
5849 | lockowner(stp->st_stateowner))) | |
5850 | goto out; | |
5851 | ||
5852 | release_lock_stateid(stp); | |
5853 | ret = nfs_ok; | |
5854 | ||
5855 | out: | |
5856 | mutex_unlock(&stp->st_mutex); | |
659aefb6 | 5857 | out_put_stid: |
42691398 CL |
5858 | nfs4_put_stid(s); |
5859 | return ret; | |
5860 | } | |
5861 | ||
e1ca12df BS |
5862 | __be32 |
5863 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
eb69853d | 5864 | union nfsd4_op_u *u) |
e1ca12df | 5865 | { |
eb69853d | 5866 | struct nfsd4_free_stateid *free_stateid = &u->free_stateid; |
e1ca12df | 5867 | stateid_t *stateid = &free_stateid->fr_stateid; |
2da1cec7 | 5868 | struct nfs4_stid *s; |
3bd64a5b | 5869 | struct nfs4_delegation *dp; |
38c2f4b1 | 5870 | struct nfs4_client *cl = cstate->session->se_client; |
2da1cec7 | 5871 | __be32 ret = nfserr_bad_stateid; |
e1ca12df | 5872 | |
1af71cc8 JL |
5873 | spin_lock(&cl->cl_lock); |
5874 | s = find_stateid_locked(cl, stateid); | |
2da1cec7 | 5875 | if (!s) |
1af71cc8 | 5876 | goto out_unlock; |
03da3169 | 5877 | spin_lock(&s->sc_lock); |
2da1cec7 BF |
5878 | switch (s->sc_type) { |
5879 | case NFS4_DELEG_STID: | |
e1ca12df | 5880 | ret = nfserr_locks_held; |
1af71cc8 | 5881 | break; |
2da1cec7 | 5882 | case NFS4_OPEN_STID: |
2da1cec7 BF |
5883 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
5884 | if (ret) | |
1af71cc8 JL |
5885 | break; |
5886 | ret = nfserr_locks_held; | |
f7a4d872 | 5887 | break; |
1af71cc8 | 5888 | case NFS4_LOCK_STID: |
03da3169 | 5889 | spin_unlock(&s->sc_lock); |
a15dfcd5 | 5890 | refcount_inc(&s->sc_count); |
1af71cc8 | 5891 | spin_unlock(&cl->cl_lock); |
42691398 | 5892 | ret = nfsd4_free_lock_stateid(stateid, s); |
1af71cc8 | 5893 | goto out; |
3bd64a5b | 5894 | case NFS4_REVOKED_DELEG_STID: |
03da3169 | 5895 | spin_unlock(&s->sc_lock); |
3bd64a5b | 5896 | dp = delegstateid(s); |
2d4a532d JL |
5897 | list_del_init(&dp->dl_recall_lru); |
5898 | spin_unlock(&cl->cl_lock); | |
6011695d | 5899 | nfs4_put_stid(s); |
3bd64a5b | 5900 | ret = nfs_ok; |
1af71cc8 JL |
5901 | goto out; |
5902 | /* Default falls through and returns nfserr_bad_stateid */ | |
e1ca12df | 5903 | } |
03da3169 | 5904 | spin_unlock(&s->sc_lock); |
1af71cc8 JL |
5905 | out_unlock: |
5906 | spin_unlock(&cl->cl_lock); | |
e1ca12df | 5907 | out: |
e1ca12df BS |
5908 | return ret; |
5909 | } | |
5910 | ||
4c4cd222 N |
5911 | static inline int |
5912 | setlkflg (int type) | |
5913 | { | |
5914 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
5915 | RD_STATE : WR_STATE; | |
5916 | } | |
1da177e4 | 5917 | |
dcef0413 | 5918 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
c0a5d93e BF |
5919 | { |
5920 | struct svc_fh *current_fh = &cstate->current_fh; | |
5921 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
5922 | __be32 status; | |
5923 | ||
c0a5d93e BF |
5924 | status = nfsd4_check_seqid(cstate, sop, seqid); |
5925 | if (status) | |
5926 | return status; | |
9271d7e5 TM |
5927 | status = nfsd4_lock_ol_stateid(stp); |
5928 | if (status != nfs_ok) | |
5929 | return status; | |
f7a4d872 | 5930 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
35a92fe8 JL |
5931 | if (status == nfs_ok) |
5932 | status = nfs4_check_fh(current_fh, &stp->st_stid); | |
5933 | if (status != nfs_ok) | |
feb9dad5 | 5934 | mutex_unlock(&stp->st_mutex); |
35a92fe8 | 5935 | return status; |
c0a5d93e BF |
5936 | } |
5937 | ||
1da177e4 LT |
5938 | /* |
5939 | * Checks for sequence id mutating operations. | |
5940 | */ | |
b37ad28b | 5941 | static __be32 |
dd453dfd | 5942 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2288d0e3 | 5943 | stateid_t *stateid, char typemask, |
3320fef1 SK |
5944 | struct nfs4_ol_stateid **stpp, |
5945 | struct nfsd_net *nn) | |
1da177e4 | 5946 | { |
0836f587 | 5947 | __be32 status; |
38c2f4b1 | 5948 | struct nfs4_stid *s; |
e17f99b7 | 5949 | struct nfs4_ol_stateid *stp = NULL; |
1da177e4 | 5950 | |
8c10cbdb BH |
5951 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
5952 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 5953 | |
1da177e4 | 5954 | *stpp = NULL; |
2dd6e458 | 5955 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
c0a5d93e BF |
5956 | if (status) |
5957 | return status; | |
e17f99b7 | 5958 | stp = openlockstateid(s); |
58fb12e6 | 5959 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
1da177e4 | 5960 | |
e17f99b7 | 5961 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
fd911011 | 5962 | if (!status) |
e17f99b7 | 5963 | *stpp = stp; |
fd911011 TM |
5964 | else |
5965 | nfs4_put_stid(&stp->st_stid); | |
e17f99b7 | 5966 | return status; |
c0a5d93e | 5967 | } |
39325bd0 | 5968 | |
3320fef1 SK |
5969 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
5970 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) | |
c0a5d93e BF |
5971 | { |
5972 | __be32 status; | |
5973 | struct nfs4_openowner *oo; | |
4cbfc9f7 | 5974 | struct nfs4_ol_stateid *stp; |
1da177e4 | 5975 | |
c0a5d93e | 5976 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
4cbfc9f7 | 5977 | NFS4_OPEN_STID, &stp, nn); |
7a8711c9 BF |
5978 | if (status) |
5979 | return status; | |
4cbfc9f7 TM |
5980 | oo = openowner(stp->st_stateowner); |
5981 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { | |
feb9dad5 | 5982 | mutex_unlock(&stp->st_mutex); |
4cbfc9f7 | 5983 | nfs4_put_stid(&stp->st_stid); |
3a4f98bb | 5984 | return nfserr_bad_stateid; |
4cbfc9f7 TM |
5985 | } |
5986 | *stpp = stp; | |
3a4f98bb | 5987 | return nfs_ok; |
1da177e4 LT |
5988 | } |
5989 | ||
b37ad28b | 5990 | __be32 |
ca364317 | 5991 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 5992 | union nfsd4_op_u *u) |
1da177e4 | 5993 | { |
eb69853d | 5994 | struct nfsd4_open_confirm *oc = &u->open_confirm; |
b37ad28b | 5995 | __be32 status; |
fe0750e5 | 5996 | struct nfs4_openowner *oo; |
dcef0413 | 5997 | struct nfs4_ol_stateid *stp; |
3320fef1 | 5998 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 5999 | |
a6a9f18f AV |
6000 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
6001 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6002 | |
ca364317 | 6003 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
6004 | if (status) |
6005 | return status; | |
1da177e4 | 6006 | |
9072d5c6 | 6007 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 6008 | oc->oc_seqid, &oc->oc_req_stateid, |
3320fef1 | 6009 | NFS4_OPEN_STID, &stp, nn); |
9072d5c6 | 6010 | if (status) |
68b66e82 | 6011 | goto out; |
fe0750e5 | 6012 | oo = openowner(stp->st_stateowner); |
68b66e82 | 6013 | status = nfserr_bad_stateid; |
35a92fe8 | 6014 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
feb9dad5 | 6015 | mutex_unlock(&stp->st_mutex); |
2585fc79 | 6016 | goto put_stateid; |
35a92fe8 | 6017 | } |
dad1c067 | 6018 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
9767feb2 | 6019 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
feb9dad5 | 6020 | mutex_unlock(&stp->st_mutex); |
8c10cbdb | 6021 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
dcef0413 | 6022 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
c7b9a459 | 6023 | |
2a4317c5 | 6024 | nfsd4_client_record_create(oo->oo_owner.so_client); |
68b66e82 | 6025 | status = nfs_ok; |
2585fc79 TM |
6026 | put_stateid: |
6027 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6028 | out: |
9411b1d4 | 6029 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6030 | return status; |
6031 | } | |
6032 | ||
6409a5a6 | 6033 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
1da177e4 | 6034 | { |
82c5ff1b | 6035 | if (!test_access(access, stp)) |
6409a5a6 | 6036 | return; |
11b9164a | 6037 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
82c5ff1b | 6038 | clear_access(access, stp); |
6409a5a6 | 6039 | } |
f197c271 | 6040 | |
6409a5a6 BF |
6041 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
6042 | { | |
6043 | switch (to_access) { | |
6044 | case NFS4_SHARE_ACCESS_READ: | |
6045 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); | |
6046 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6047 | break; | |
6048 | case NFS4_SHARE_ACCESS_WRITE: | |
6049 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); | |
6050 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); | |
6051 | break; | |
6052 | case NFS4_SHARE_ACCESS_BOTH: | |
6053 | break; | |
6054 | default: | |
063b0fb9 | 6055 | WARN_ON_ONCE(1); |
1da177e4 LT |
6056 | } |
6057 | } | |
6058 | ||
b37ad28b | 6059 | __be32 |
ca364317 | 6060 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
eb69853d | 6061 | struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
1da177e4 | 6062 | { |
eb69853d | 6063 | struct nfsd4_open_downgrade *od = &u->open_downgrade; |
b37ad28b | 6064 | __be32 status; |
dcef0413 | 6065 | struct nfs4_ol_stateid *stp; |
3320fef1 | 6066 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6067 | |
a6a9f18f AV |
6068 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
6069 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6070 | |
c30e92df | 6071 | /* We don't yet support WANT bits: */ |
2c8bd7e0 BH |
6072 | if (od->od_deleg_want) |
6073 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, | |
6074 | od->od_deleg_want); | |
1da177e4 | 6075 | |
c0a5d93e | 6076 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
3320fef1 | 6077 | &od->od_stateid, &stp, nn); |
9072d5c6 | 6078 | if (status) |
1da177e4 | 6079 | goto out; |
1da177e4 | 6080 | status = nfserr_inval; |
82c5ff1b | 6081 | if (!test_access(od->od_share_access, stp)) { |
c11c591f | 6082 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
1da177e4 | 6083 | stp->st_access_bmap, od->od_share_access); |
0667b1e9 | 6084 | goto put_stateid; |
1da177e4 | 6085 | } |
ce0fc43c | 6086 | if (!test_deny(od->od_share_deny, stp)) { |
c11c591f | 6087 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
1da177e4 | 6088 | stp->st_deny_bmap, od->od_share_deny); |
0667b1e9 | 6089 | goto put_stateid; |
1da177e4 | 6090 | } |
6409a5a6 | 6091 | nfs4_stateid_downgrade(stp, od->od_share_access); |
ce0fc43c | 6092 | reset_union_bmap_deny(od->od_share_deny, stp); |
9767feb2 | 6093 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
1da177e4 | 6094 | status = nfs_ok; |
0667b1e9 | 6095 | put_stateid: |
feb9dad5 | 6096 | mutex_unlock(&stp->st_mutex); |
0667b1e9 | 6097 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6098 | out: |
9411b1d4 | 6099 | nfsd4_bump_seqid(cstate, status); |
1da177e4 LT |
6100 | return status; |
6101 | } | |
6102 | ||
f7a4d872 BF |
6103 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
6104 | { | |
acf9295b | 6105 | struct nfs4_client *clp = s->st_stid.sc_client; |
e8568739 | 6106 | bool unhashed; |
d83017f9 | 6107 | LIST_HEAD(reaplist); |
acf9295b | 6108 | |
2c41beb0 | 6109 | spin_lock(&clp->cl_lock); |
e8568739 | 6110 | unhashed = unhash_open_stateid(s, &reaplist); |
acf9295b | 6111 | |
d83017f9 | 6112 | if (clp->cl_minorversion) { |
e8568739 JL |
6113 | if (unhashed) |
6114 | put_ol_stateid_locked(s, &reaplist); | |
d83017f9 JL |
6115 | spin_unlock(&clp->cl_lock); |
6116 | free_ol_stateid_reaplist(&reaplist); | |
6117 | } else { | |
6118 | spin_unlock(&clp->cl_lock); | |
6119 | free_ol_stateid_reaplist(&reaplist); | |
e8568739 JL |
6120 | if (unhashed) |
6121 | move_to_close_lru(s, clp->net); | |
d83017f9 | 6122 | } |
38c387b5 BF |
6123 | } |
6124 | ||
1da177e4 LT |
6125 | /* |
6126 | * nfs4_unlock_state() called after encode | |
6127 | */ | |
b37ad28b | 6128 | __be32 |
ca364317 | 6129 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6130 | union nfsd4_op_u *u) |
1da177e4 | 6131 | { |
eb69853d | 6132 | struct nfsd4_close *close = &u->close; |
b37ad28b | 6133 | __be32 status; |
dcef0413 | 6134 | struct nfs4_ol_stateid *stp; |
3320fef1 SK |
6135 | struct net *net = SVC_NET(rqstp); |
6136 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 | 6137 | |
a6a9f18f AV |
6138 | dprintk("NFSD: nfsd4_close on file %pd\n", |
6139 | cstate->current_fh.fh_dentry); | |
1da177e4 | 6140 | |
f7a4d872 BF |
6141 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
6142 | &close->cl_stateid, | |
6143 | NFS4_OPEN_STID|NFS4_CLOSED_STID, | |
3320fef1 | 6144 | &stp, nn); |
9411b1d4 | 6145 | nfsd4_bump_seqid(cstate, status); |
9072d5c6 | 6146 | if (status) |
1da177e4 | 6147 | goto out; |
15ca08d3 TM |
6148 | |
6149 | stp->st_stid.sc_type = NFS4_CLOSED_STID; | |
bd2decac JL |
6150 | |
6151 | /* | |
6152 | * Technically we don't _really_ have to increment or copy it, since | |
6153 | * it should just be gone after this operation and we clobber the | |
6154 | * copied value below, but we continue to do so here just to ensure | |
6155 | * that racing ops see that there was a state change. | |
6156 | */ | |
9767feb2 | 6157 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
1da177e4 | 6158 | |
f7a4d872 | 6159 | nfsd4_close_open_stateid(stp); |
15ca08d3 | 6160 | mutex_unlock(&stp->st_mutex); |
8a0b589d | 6161 | |
bd2decac JL |
6162 | /* v4.1+ suggests that we send a special stateid in here, since the |
6163 | * clients should just ignore this anyway. Since this is not useful | |
6164 | * for v4.0 clients either, we set it to the special close_stateid | |
6165 | * universally. | |
6166 | * | |
6167 | * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 | |
6168 | */ | |
6169 | memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); | |
fb500a7c | 6170 | |
8a0b589d TM |
6171 | /* put reference from nfs4_preprocess_seqid_op */ |
6172 | nfs4_put_stid(&stp->st_stid); | |
1da177e4 | 6173 | out: |
1da177e4 LT |
6174 | return status; |
6175 | } | |
6176 | ||
b37ad28b | 6177 | __be32 |
ca364317 | 6178 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6179 | union nfsd4_op_u *u) |
1da177e4 | 6180 | { |
eb69853d | 6181 | struct nfsd4_delegreturn *dr = &u->delegreturn; |
203a8c8e BF |
6182 | struct nfs4_delegation *dp; |
6183 | stateid_t *stateid = &dr->dr_stateid; | |
38c2f4b1 | 6184 | struct nfs4_stid *s; |
b37ad28b | 6185 | __be32 status; |
3320fef1 | 6186 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6187 | |
ca364317 | 6188 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e | 6189 | return status; |
1da177e4 | 6190 | |
2dd6e458 | 6191 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
38c2f4b1 | 6192 | if (status) |
203a8c8e | 6193 | goto out; |
38c2f4b1 | 6194 | dp = delegstateid(s); |
03da3169 | 6195 | status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); |
203a8c8e | 6196 | if (status) |
fd911011 | 6197 | goto put_stateid; |
203a8c8e | 6198 | |
3bd64a5b | 6199 | destroy_delegation(dp); |
fd911011 TM |
6200 | put_stateid: |
6201 | nfs4_put_stid(&dp->dl_stid); | |
1da177e4 LT |
6202 | out: |
6203 | return status; | |
6204 | } | |
6205 | ||
87df4de8 BH |
6206 | static inline u64 |
6207 | end_offset(u64 start, u64 len) | |
6208 | { | |
6209 | u64 end; | |
6210 | ||
6211 | end = start + len; | |
6212 | return end >= start ? end: NFS4_MAX_UINT64; | |
6213 | } | |
6214 | ||
6215 | /* last octet in a range */ | |
6216 | static inline u64 | |
6217 | last_byte_offset(u64 start, u64 len) | |
6218 | { | |
6219 | u64 end; | |
6220 | ||
063b0fb9 | 6221 | WARN_ON_ONCE(!len); |
87df4de8 BH |
6222 | end = start + len; |
6223 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
6224 | } | |
6225 | ||
1da177e4 LT |
6226 | /* |
6227 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
6228 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
6229 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
6230 | * locking, this prevents us from being completely protocol-compliant. The | |
6231 | * real solution to this problem is to start using unsigned file offsets in | |
6232 | * the VFS, but this is a very deep change! | |
6233 | */ | |
6234 | static inline void | |
6235 | nfs4_transform_lock_offset(struct file_lock *lock) | |
6236 | { | |
6237 | if (lock->fl_start < 0) | |
6238 | lock->fl_start = OFFSET_MAX; | |
6239 | if (lock->fl_end < 0) | |
6240 | lock->fl_end = OFFSET_MAX; | |
6241 | } | |
6242 | ||
cae80b30 JL |
6243 | static fl_owner_t |
6244 | nfsd4_fl_get_owner(fl_owner_t owner) | |
aef9583b | 6245 | { |
cae80b30 JL |
6246 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
6247 | ||
6248 | nfs4_get_stateowner(&lo->lo_owner); | |
6249 | return owner; | |
aef9583b KM |
6250 | } |
6251 | ||
cae80b30 JL |
6252 | static void |
6253 | nfsd4_fl_put_owner(fl_owner_t owner) | |
aef9583b | 6254 | { |
cae80b30 | 6255 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
aef9583b | 6256 | |
cae80b30 | 6257 | if (lo) |
aef9583b | 6258 | nfs4_put_stateowner(&lo->lo_owner); |
aef9583b KM |
6259 | } |
6260 | ||
76d348fa JL |
6261 | static void |
6262 | nfsd4_lm_notify(struct file_lock *fl) | |
6263 | { | |
6264 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; | |
6265 | struct net *net = lo->lo_owner.so_client->net; | |
6266 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
6267 | struct nfsd4_blocked_lock *nbl = container_of(fl, | |
6268 | struct nfsd4_blocked_lock, nbl_lock); | |
6269 | bool queue = false; | |
6270 | ||
7919d0a2 | 6271 | /* An empty list means that something else is going to be using it */ |
0cc11a61 | 6272 | spin_lock(&nn->blocked_locks_lock); |
76d348fa JL |
6273 | if (!list_empty(&nbl->nbl_list)) { |
6274 | list_del_init(&nbl->nbl_list); | |
7919d0a2 | 6275 | list_del_init(&nbl->nbl_lru); |
76d348fa JL |
6276 | queue = true; |
6277 | } | |
0cc11a61 | 6278 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6279 | |
6280 | if (queue) | |
6281 | nfsd4_run_cb(&nbl->nbl_cb); | |
6282 | } | |
6283 | ||
7b021967 | 6284 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
76d348fa | 6285 | .lm_notify = nfsd4_lm_notify, |
aef9583b KM |
6286 | .lm_get_owner = nfsd4_fl_get_owner, |
6287 | .lm_put_owner = nfsd4_fl_put_owner, | |
d5b9026a | 6288 | }; |
1da177e4 LT |
6289 | |
6290 | static inline void | |
6291 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
6292 | { | |
fe0750e5 | 6293 | struct nfs4_lockowner *lo; |
1da177e4 | 6294 | |
d5b9026a | 6295 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 | 6296 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
6f4859b8 BF |
6297 | xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, |
6298 | GFP_KERNEL); | |
7c13f344 BF |
6299 | if (!deny->ld_owner.data) |
6300 | /* We just don't care that much */ | |
6301 | goto nevermind; | |
fe0750e5 | 6302 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
d5b9026a | 6303 | } else { |
7c13f344 BF |
6304 | nevermind: |
6305 | deny->ld_owner.len = 0; | |
6306 | deny->ld_owner.data = NULL; | |
d5b9026a N |
6307 | deny->ld_clientid.cl_boot = 0; |
6308 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
6309 | } |
6310 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
6311 | deny->ld_length = NFS4_MAX_UINT64; |
6312 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
6313 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
6314 | deny->ld_type = NFS4_READ_LT; | |
6315 | if (fl->fl_type != F_RDLCK) | |
6316 | deny->ld_type = NFS4_WRITE_LT; | |
6317 | } | |
6318 | ||
fe0750e5 | 6319 | static struct nfs4_lockowner * |
c8623999 | 6320 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
1da177e4 | 6321 | { |
d4f0489f | 6322 | unsigned int strhashval = ownerstr_hashval(owner); |
b3c32bcd | 6323 | struct nfs4_stateowner *so; |
1da177e4 | 6324 | |
0a880a28 TM |
6325 | lockdep_assert_held(&clp->cl_lock); |
6326 | ||
d4f0489f TM |
6327 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
6328 | so_strhash) { | |
b3c32bcd TM |
6329 | if (so->so_is_open_owner) |
6330 | continue; | |
b5971afa KM |
6331 | if (same_owner_str(so, owner)) |
6332 | return lockowner(nfs4_get_stateowner(so)); | |
1da177e4 LT |
6333 | } |
6334 | return NULL; | |
6335 | } | |
6336 | ||
c58c6610 | 6337 | static struct nfs4_lockowner * |
c8623999 | 6338 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
c58c6610 TM |
6339 | { |
6340 | struct nfs4_lockowner *lo; | |
6341 | ||
d4f0489f | 6342 | spin_lock(&clp->cl_lock); |
c8623999 | 6343 | lo = find_lockowner_str_locked(clp, owner); |
d4f0489f | 6344 | spin_unlock(&clp->cl_lock); |
c58c6610 TM |
6345 | return lo; |
6346 | } | |
6347 | ||
8f4b54c5 JL |
6348 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
6349 | { | |
c58c6610 | 6350 | unhash_lockowner_locked(lockowner(sop)); |
8f4b54c5 JL |
6351 | } |
6352 | ||
6b180f0b JL |
6353 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
6354 | { | |
6355 | struct nfs4_lockowner *lo = lockowner(sop); | |
6356 | ||
6357 | kmem_cache_free(lockowner_slab, lo); | |
6358 | } | |
6359 | ||
6360 | static const struct nfs4_stateowner_operations lockowner_ops = { | |
8f4b54c5 JL |
6361 | .so_unhash = nfs4_unhash_lockowner, |
6362 | .so_free = nfs4_free_lockowner, | |
6b180f0b JL |
6363 | }; |
6364 | ||
1da177e4 LT |
6365 | /* |
6366 | * Alloc a lock owner structure. | |
6367 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 6368 | * occurred. |
1da177e4 | 6369 | * |
16bfdaaf | 6370 | * strhashval = ownerstr_hashval |
1da177e4 | 6371 | */ |
fe0750e5 | 6372 | static struct nfs4_lockowner * |
c58c6610 TM |
6373 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
6374 | struct nfs4_ol_stateid *open_stp, | |
6375 | struct nfsd4_lock *lock) | |
6376 | { | |
c58c6610 | 6377 | struct nfs4_lockowner *lo, *ret; |
1da177e4 | 6378 | |
fe0750e5 BF |
6379 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
6380 | if (!lo) | |
1da177e4 | 6381 | return NULL; |
76d348fa | 6382 | INIT_LIST_HEAD(&lo->lo_blocked); |
fe0750e5 BF |
6383 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
6384 | lo->lo_owner.so_is_open_owner = 0; | |
5db1c03f | 6385 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
6b180f0b | 6386 | lo->lo_owner.so_ops = &lockowner_ops; |
d4f0489f | 6387 | spin_lock(&clp->cl_lock); |
c8623999 | 6388 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
c58c6610 TM |
6389 | if (ret == NULL) { |
6390 | list_add(&lo->lo_owner.so_strhash, | |
d4f0489f | 6391 | &clp->cl_ownerstr_hashtbl[strhashval]); |
c58c6610 TM |
6392 | ret = lo; |
6393 | } else | |
d50ffded KM |
6394 | nfs4_free_stateowner(&lo->lo_owner); |
6395 | ||
d4f0489f | 6396 | spin_unlock(&clp->cl_lock); |
340f0ba1 | 6397 | return ret; |
1da177e4 LT |
6398 | } |
6399 | ||
fd1fd685 | 6400 | static struct nfs4_ol_stateid * |
a451b123 TM |
6401 | find_lock_stateid(const struct nfs4_lockowner *lo, |
6402 | const struct nfs4_ol_stateid *ost) | |
fd1fd685 TM |
6403 | { |
6404 | struct nfs4_ol_stateid *lst; | |
fd1fd685 | 6405 | |
a451b123 | 6406 | lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); |
fd1fd685 | 6407 | |
a451b123 TM |
6408 | /* If ost is not hashed, ost->st_locks will not be valid */ |
6409 | if (!nfs4_ol_stateid_unhashed(ost)) | |
6410 | list_for_each_entry(lst, &ost->st_locks, st_locks) { | |
6411 | if (lst->st_stateowner == &lo->lo_owner) { | |
6412 | refcount_inc(&lst->st_stid.sc_count); | |
6413 | return lst; | |
6414 | } | |
fd1fd685 | 6415 | } |
fd1fd685 TM |
6416 | return NULL; |
6417 | } | |
6418 | ||
beeca19c | 6419 | static struct nfs4_ol_stateid * |
356a95ec JL |
6420 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
6421 | struct nfs4_file *fp, struct inode *inode, | |
6422 | struct nfs4_ol_stateid *open_stp) | |
1da177e4 | 6423 | { |
d3b313a4 | 6424 | struct nfs4_client *clp = lo->lo_owner.so_client; |
beeca19c | 6425 | struct nfs4_ol_stateid *retstp; |
1da177e4 | 6426 | |
beeca19c | 6427 | mutex_init(&stp->st_mutex); |
4f34bd05 | 6428 | mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); |
beeca19c TM |
6429 | retry: |
6430 | spin_lock(&clp->cl_lock); | |
a451b123 TM |
6431 | if (nfs4_ol_stateid_unhashed(open_stp)) |
6432 | goto out_close; | |
6433 | retstp = find_lock_stateid(lo, open_stp); | |
beeca19c | 6434 | if (retstp) |
a451b123 | 6435 | goto out_found; |
a15dfcd5 | 6436 | refcount_inc(&stp->st_stid.sc_count); |
3abdb607 | 6437 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
b5971afa | 6438 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
13cd2184 | 6439 | get_nfs4_file(fp); |
11b9164a | 6440 | stp->st_stid.sc_file = fp; |
0997b173 | 6441 | stp->st_access_bmap = 0; |
1da177e4 | 6442 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 6443 | stp->st_openstp = open_stp; |
a451b123 | 6444 | spin_lock(&fp->fi_lock); |
3c87b9b7 | 6445 | list_add(&stp->st_locks, &open_stp->st_locks); |
1c755dc1 | 6446 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
1d31a253 TM |
6447 | list_add(&stp->st_perfile, &fp->fi_stateids); |
6448 | spin_unlock(&fp->fi_lock); | |
beeca19c | 6449 | spin_unlock(&clp->cl_lock); |
beeca19c | 6450 | return stp; |
a451b123 TM |
6451 | out_found: |
6452 | spin_unlock(&clp->cl_lock); | |
6453 | if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { | |
6454 | nfs4_put_stid(&retstp->st_stid); | |
6455 | goto retry; | |
6456 | } | |
6457 | /* To keep mutex tracking happy */ | |
6458 | mutex_unlock(&stp->st_mutex); | |
6459 | return retstp; | |
6460 | out_close: | |
6461 | spin_unlock(&clp->cl_lock); | |
6462 | mutex_unlock(&stp->st_mutex); | |
6463 | return NULL; | |
1da177e4 LT |
6464 | } |
6465 | ||
356a95ec JL |
6466 | static struct nfs4_ol_stateid * |
6467 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, | |
6468 | struct inode *inode, struct nfs4_ol_stateid *ost, | |
6469 | bool *new) | |
6470 | { | |
6471 | struct nfs4_stid *ns = NULL; | |
6472 | struct nfs4_ol_stateid *lst; | |
6473 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); | |
6474 | struct nfs4_client *clp = oo->oo_owner.so_client; | |
6475 | ||
beeca19c | 6476 | *new = false; |
356a95ec | 6477 | spin_lock(&clp->cl_lock); |
a451b123 | 6478 | lst = find_lock_stateid(lo, ost); |
356a95ec | 6479 | spin_unlock(&clp->cl_lock); |
beeca19c TM |
6480 | if (lst != NULL) { |
6481 | if (nfsd4_lock_ol_stateid(lst) == nfs_ok) | |
6482 | goto out; | |
6483 | nfs4_put_stid(&lst->st_stid); | |
6484 | } | |
6485 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); | |
6486 | if (ns == NULL) | |
6487 | return NULL; | |
6488 | ||
6489 | lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); | |
6490 | if (lst == openlockstateid(ns)) | |
6491 | *new = true; | |
6492 | else | |
356a95ec | 6493 | nfs4_put_stid(ns); |
beeca19c | 6494 | out: |
356a95ec JL |
6495 | return lst; |
6496 | } | |
c53530da | 6497 | |
fd39ca9a | 6498 | static int |
1da177e4 LT |
6499 | check_lock_length(u64 offset, u64 length) |
6500 | { | |
e7969315 KM |
6501 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
6502 | (length > ~offset))); | |
1da177e4 LT |
6503 | } |
6504 | ||
dcef0413 | 6505 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
0997b173 | 6506 | { |
11b9164a | 6507 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
0997b173 | 6508 | |
7214e860 JL |
6509 | lockdep_assert_held(&fp->fi_lock); |
6510 | ||
82c5ff1b | 6511 | if (test_access(access, lock_stp)) |
0997b173 | 6512 | return; |
12659651 | 6513 | __nfs4_file_get_access(fp, access); |
82c5ff1b | 6514 | set_access(access, lock_stp); |
0997b173 BF |
6515 | } |
6516 | ||
356a95ec JL |
6517 | static __be32 |
6518 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, | |
6519 | struct nfs4_ol_stateid *ost, | |
6520 | struct nfsd4_lock *lock, | |
dd257933 | 6521 | struct nfs4_ol_stateid **plst, bool *new) |
64a284d0 | 6522 | { |
5db1c03f | 6523 | __be32 status; |
11b9164a | 6524 | struct nfs4_file *fi = ost->st_stid.sc_file; |
64a284d0 BF |
6525 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
6526 | struct nfs4_client *cl = oo->oo_owner.so_client; | |
2b0143b5 | 6527 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
64a284d0 | 6528 | struct nfs4_lockowner *lo; |
dd257933 | 6529 | struct nfs4_ol_stateid *lst; |
64a284d0 BF |
6530 | unsigned int strhashval; |
6531 | ||
c8623999 | 6532 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
c53530da | 6533 | if (!lo) { |
76f6c9e1 | 6534 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
c53530da JL |
6535 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
6536 | if (lo == NULL) | |
6537 | return nfserr_jukebox; | |
6538 | } else { | |
6539 | /* with an existing lockowner, seqids must be the same */ | |
5db1c03f | 6540 | status = nfserr_bad_seqid; |
c53530da JL |
6541 | if (!cstate->minorversion && |
6542 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) | |
5db1c03f | 6543 | goto out; |
64a284d0 | 6544 | } |
c53530da | 6545 | |
dd257933 JL |
6546 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
6547 | if (lst == NULL) { | |
5db1c03f JL |
6548 | status = nfserr_jukebox; |
6549 | goto out; | |
64a284d0 | 6550 | } |
dd257933 | 6551 | |
5db1c03f | 6552 | status = nfs_ok; |
dd257933 | 6553 | *plst = lst; |
5db1c03f JL |
6554 | out: |
6555 | nfs4_put_stateowner(&lo->lo_owner); | |
6556 | return status; | |
64a284d0 BF |
6557 | } |
6558 | ||
1da177e4 LT |
6559 | /* |
6560 | * LOCK operation | |
6561 | */ | |
b37ad28b | 6562 | __be32 |
ca364317 | 6563 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6564 | union nfsd4_op_u *u) |
1da177e4 | 6565 | { |
eb69853d | 6566 | struct nfsd4_lock *lock = &u->lock; |
fe0750e5 BF |
6567 | struct nfs4_openowner *open_sop = NULL; |
6568 | struct nfs4_lockowner *lock_sop = NULL; | |
3d0fabd5 | 6569 | struct nfs4_ol_stateid *lock_stp = NULL; |
0667b1e9 | 6570 | struct nfs4_ol_stateid *open_stp = NULL; |
7214e860 | 6571 | struct nfs4_file *fp; |
eb82dd39 | 6572 | struct nfsd_file *nf = NULL; |
76d348fa | 6573 | struct nfsd4_blocked_lock *nbl = NULL; |
21179d81 JL |
6574 | struct file_lock *file_lock = NULL; |
6575 | struct file_lock *conflock = NULL; | |
b37ad28b | 6576 | __be32 status = 0; |
b34f27aa | 6577 | int lkflg; |
b8dd7b9a | 6578 | int err; |
5db1c03f | 6579 | bool new = false; |
76d348fa JL |
6580 | unsigned char fl_type; |
6581 | unsigned int fl_flags = FL_POSIX; | |
3320fef1 SK |
6582 | struct net *net = SVC_NET(rqstp); |
6583 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1da177e4 LT |
6584 | |
6585 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
6586 | (long long) lock->lk_offset, | |
6587 | (long long) lock->lk_length); | |
6588 | ||
1da177e4 LT |
6589 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
6590 | return nfserr_inval; | |
6591 | ||
ca364317 | 6592 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 6593 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
6594 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
6595 | return status; | |
6596 | } | |
6597 | ||
1da177e4 | 6598 | if (lock->lk_is_new) { |
684e5638 BF |
6599 | if (nfsd4_has_session(cstate)) |
6600 | /* See rfc 5661 18.10.3: given clientid is ignored: */ | |
76f6c9e1 | 6601 | memcpy(&lock->lk_new_clientid, |
684e5638 BF |
6602 | &cstate->session->se_client->cl_clientid, |
6603 | sizeof(clientid_t)); | |
6604 | ||
1da177e4 | 6605 | status = nfserr_stale_clientid; |
2c142baa | 6606 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
1da177e4 | 6607 | goto out; |
1da177e4 | 6608 | |
1da177e4 | 6609 | /* validate and update open stateid and open seqid */ |
c0a5d93e | 6610 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
1da177e4 LT |
6611 | lock->lk_new_open_seqid, |
6612 | &lock->lk_new_open_stateid, | |
3320fef1 | 6613 | &open_stp, nn); |
37515177 | 6614 | if (status) |
1da177e4 | 6615 | goto out; |
feb9dad5 | 6616 | mutex_unlock(&open_stp->st_mutex); |
fe0750e5 | 6617 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 6618 | status = nfserr_bad_stateid; |
684e5638 | 6619 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
76f6c9e1 | 6620 | &lock->lk_new_clientid)) |
b34f27aa | 6621 | goto out; |
64a284d0 | 6622 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
5db1c03f | 6623 | &lock_stp, &new); |
3d0fabd5 | 6624 | } else { |
dd453dfd | 6625 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
6626 | lock->lk_old_lock_seqid, |
6627 | &lock->lk_old_lock_stateid, | |
3320fef1 | 6628 | NFS4_LOCK_STID, &lock_stp, nn); |
3d0fabd5 | 6629 | } |
e1aaa891 BF |
6630 | if (status) |
6631 | goto out; | |
64a284d0 | 6632 | lock_sop = lockowner(lock_stp->st_stateowner); |
1da177e4 | 6633 | |
b34f27aa BF |
6634 | lkflg = setlkflg(lock->lk_type); |
6635 | status = nfs4_check_openmode(lock_stp, lkflg); | |
6636 | if (status) | |
6637 | goto out; | |
6638 | ||
0dd395dc | 6639 | status = nfserr_grace; |
3320fef1 | 6640 | if (locks_in_grace(net) && !lock->lk_reclaim) |
0dd395dc N |
6641 | goto out; |
6642 | status = nfserr_no_grace; | |
3320fef1 | 6643 | if (!locks_in_grace(net) && lock->lk_reclaim) |
0dd395dc N |
6644 | goto out; |
6645 | ||
11b9164a | 6646 | fp = lock_stp->st_stid.sc_file; |
1da177e4 | 6647 | switch (lock->lk_type) { |
1da177e4 | 6648 | case NFS4_READW_LT: |
76d348fa JL |
6649 | if (nfsd4_has_session(cstate)) |
6650 | fl_flags |= FL_SLEEP; | |
6651 | /* Fallthrough */ | |
6652 | case NFS4_READ_LT: | |
7214e860 | 6653 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
6654 | nf = find_readable_file_locked(fp); |
6655 | if (nf) | |
0997b173 | 6656 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
7214e860 | 6657 | spin_unlock(&fp->fi_lock); |
76d348fa | 6658 | fl_type = F_RDLCK; |
529d7b2a | 6659 | break; |
1da177e4 | 6660 | case NFS4_WRITEW_LT: |
76d348fa JL |
6661 | if (nfsd4_has_session(cstate)) |
6662 | fl_flags |= FL_SLEEP; | |
6663 | /* Fallthrough */ | |
6664 | case NFS4_WRITE_LT: | |
7214e860 | 6665 | spin_lock(&fp->fi_lock); |
eb82dd39 JL |
6666 | nf = find_writeable_file_locked(fp); |
6667 | if (nf) | |
0997b173 | 6668 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
7214e860 | 6669 | spin_unlock(&fp->fi_lock); |
76d348fa | 6670 | fl_type = F_WRLCK; |
529d7b2a | 6671 | break; |
1da177e4 LT |
6672 | default: |
6673 | status = nfserr_inval; | |
6674 | goto out; | |
6675 | } | |
76d348fa | 6676 | |
eb82dd39 | 6677 | if (!nf) { |
f9d7562f BF |
6678 | status = nfserr_openmode; |
6679 | goto out; | |
6680 | } | |
aef9583b | 6681 | |
76d348fa JL |
6682 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
6683 | if (!nbl) { | |
6684 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); | |
6685 | status = nfserr_jukebox; | |
6686 | goto out; | |
6687 | } | |
6688 | ||
6689 | file_lock = &nbl->nbl_lock; | |
6690 | file_lock->fl_type = fl_type; | |
aef9583b | 6691 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
21179d81 | 6692 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 6693 | file_lock->fl_file = nf->nf_file; |
76d348fa | 6694 | file_lock->fl_flags = fl_flags; |
21179d81 JL |
6695 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
6696 | file_lock->fl_start = lock->lk_offset; | |
6697 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); | |
6698 | nfs4_transform_lock_offset(file_lock); | |
6699 | ||
6700 | conflock = locks_alloc_lock(); | |
6701 | if (!conflock) { | |
6702 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6703 | status = nfserr_jukebox; | |
6704 | goto out; | |
6705 | } | |
1da177e4 | 6706 | |
76d348fa | 6707 | if (fl_flags & FL_SLEEP) { |
20b7d86f | 6708 | nbl->nbl_time = ktime_get_boottime_seconds(); |
0cc11a61 | 6709 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6710 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
7919d0a2 | 6711 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
0cc11a61 | 6712 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6713 | } |
6714 | ||
eb82dd39 | 6715 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); |
76d348fa | 6716 | switch (err) { |
1da177e4 | 6717 | case 0: /* success! */ |
9767feb2 | 6718 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
b8dd7b9a | 6719 | status = 0; |
03f318ca BF |
6720 | if (lock->lk_reclaim) |
6721 | nn->somebody_reclaimed = true; | |
eb76b3fd | 6722 | break; |
76d348fa JL |
6723 | case FILE_LOCK_DEFERRED: |
6724 | nbl = NULL; | |
6725 | /* Fallthrough */ | |
6726 | case -EAGAIN: /* conflock holds conflicting lock */ | |
eb76b3fd AA |
6727 | status = nfserr_denied; |
6728 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
21179d81 | 6729 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
eb76b3fd | 6730 | break; |
76d348fa | 6731 | case -EDEADLK: |
1da177e4 | 6732 | status = nfserr_deadlock; |
eb76b3fd | 6733 | break; |
3e772463 | 6734 | default: |
fd85b817 | 6735 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 6736 | status = nfserrno(err); |
eb76b3fd | 6737 | break; |
1da177e4 | 6738 | } |
1da177e4 | 6739 | out: |
76d348fa JL |
6740 | if (nbl) { |
6741 | /* dequeue it if we queued it before */ | |
6742 | if (fl_flags & FL_SLEEP) { | |
0cc11a61 | 6743 | spin_lock(&nn->blocked_locks_lock); |
76d348fa | 6744 | list_del_init(&nbl->nbl_list); |
7919d0a2 | 6745 | list_del_init(&nbl->nbl_lru); |
0cc11a61 | 6746 | spin_unlock(&nn->blocked_locks_lock); |
76d348fa JL |
6747 | } |
6748 | free_blocked_lock(nbl); | |
6749 | } | |
eb82dd39 JL |
6750 | if (nf) |
6751 | nfsd_file_put(nf); | |
5db1c03f JL |
6752 | if (lock_stp) { |
6753 | /* Bump seqid manually if the 4.0 replay owner is openowner */ | |
6754 | if (cstate->replay_owner && | |
6755 | cstate->replay_owner != &lock_sop->lo_owner && | |
6756 | seqid_mutating_err(ntohl(status))) | |
6757 | lock_sop->lo_owner.so_seqid++; | |
6758 | ||
6759 | /* | |
6760 | * If this is a new, never-before-used stateid, and we are | |
6761 | * returning an error, then just go ahead and release it. | |
6762 | */ | |
25020720 | 6763 | if (status && new) |
5db1c03f | 6764 | release_lock_stateid(lock_stp); |
beeca19c TM |
6765 | |
6766 | mutex_unlock(&lock_stp->st_mutex); | |
5db1c03f | 6767 | |
3d0fabd5 | 6768 | nfs4_put_stid(&lock_stp->st_stid); |
5db1c03f | 6769 | } |
0667b1e9 TM |
6770 | if (open_stp) |
6771 | nfs4_put_stid(&open_stp->st_stid); | |
9411b1d4 | 6772 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6773 | if (conflock) |
6774 | locks_free_lock(conflock); | |
1da177e4 LT |
6775 | return status; |
6776 | } | |
6777 | ||
55ef1274 BF |
6778 | /* |
6779 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
6780 | * so we do a temporary open here just to get an open file to pass to | |
6781 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
6782 | * inode operation.) | |
6783 | */ | |
04da6e9d | 6784 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
55ef1274 | 6785 | { |
6b556ca2 JL |
6786 | struct nfsd_file *nf; |
6787 | __be32 err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); | |
04da6e9d | 6788 | if (!err) { |
6b556ca2 JL |
6789 | err = nfserrno(vfs_test_lock(nf->nf_file, lock)); |
6790 | nfsd_file_put(nf); | |
04da6e9d | 6791 | } |
55ef1274 BF |
6792 | return err; |
6793 | } | |
6794 | ||
1da177e4 LT |
6795 | /* |
6796 | * LOCKT operation | |
6797 | */ | |
b37ad28b | 6798 | __be32 |
ca364317 | 6799 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6800 | union nfsd4_op_u *u) |
1da177e4 | 6801 | { |
eb69853d | 6802 | struct nfsd4_lockt *lockt = &u->lockt; |
21179d81 | 6803 | struct file_lock *file_lock = NULL; |
5db1c03f | 6804 | struct nfs4_lockowner *lo = NULL; |
b37ad28b | 6805 | __be32 status; |
7f2210fa | 6806 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 | 6807 | |
5ccb0066 | 6808 | if (locks_in_grace(SVC_NET(rqstp))) |
1da177e4 LT |
6809 | return nfserr_grace; |
6810 | ||
6811 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
6812 | return nfserr_inval; | |
6813 | ||
9b2ef62b | 6814 | if (!nfsd4_has_session(cstate)) { |
b7342204 OK |
6815 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn, |
6816 | false); | |
9b2ef62b BF |
6817 | if (status) |
6818 | goto out; | |
6819 | } | |
1da177e4 | 6820 | |
75c096f7 | 6821 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 6822 | goto out; |
1da177e4 | 6823 | |
21179d81 JL |
6824 | file_lock = locks_alloc_lock(); |
6825 | if (!file_lock) { | |
6826 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6827 | status = nfserr_jukebox; | |
6828 | goto out; | |
6829 | } | |
6cd90662 | 6830 | |
1da177e4 LT |
6831 | switch (lockt->lt_type) { |
6832 | case NFS4_READ_LT: | |
6833 | case NFS4_READW_LT: | |
21179d81 | 6834 | file_lock->fl_type = F_RDLCK; |
f50c9d79 | 6835 | break; |
1da177e4 LT |
6836 | case NFS4_WRITE_LT: |
6837 | case NFS4_WRITEW_LT: | |
21179d81 | 6838 | file_lock->fl_type = F_WRLCK; |
f50c9d79 | 6839 | break; |
1da177e4 | 6840 | default: |
2fdada03 | 6841 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 | 6842 | status = nfserr_inval; |
f50c9d79 | 6843 | goto out; |
1da177e4 LT |
6844 | } |
6845 | ||
c8623999 | 6846 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
fe0750e5 | 6847 | if (lo) |
21179d81 JL |
6848 | file_lock->fl_owner = (fl_owner_t)lo; |
6849 | file_lock->fl_pid = current->tgid; | |
6850 | file_lock->fl_flags = FL_POSIX; | |
1da177e4 | 6851 | |
21179d81 JL |
6852 | file_lock->fl_start = lockt->lt_offset; |
6853 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); | |
1da177e4 | 6854 | |
21179d81 | 6855 | nfs4_transform_lock_offset(file_lock); |
1da177e4 | 6856 | |
21179d81 | 6857 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
04da6e9d | 6858 | if (status) |
fd85b817 | 6859 | goto out; |
04da6e9d | 6860 | |
21179d81 | 6861 | if (file_lock->fl_type != F_UNLCK) { |
1da177e4 | 6862 | status = nfserr_denied; |
21179d81 | 6863 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
1da177e4 LT |
6864 | } |
6865 | out: | |
5db1c03f JL |
6866 | if (lo) |
6867 | nfs4_put_stateowner(&lo->lo_owner); | |
21179d81 JL |
6868 | if (file_lock) |
6869 | locks_free_lock(file_lock); | |
1da177e4 LT |
6870 | return status; |
6871 | } | |
6872 | ||
b37ad28b | 6873 | __be32 |
ca364317 | 6874 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
eb69853d | 6875 | union nfsd4_op_u *u) |
1da177e4 | 6876 | { |
eb69853d | 6877 | struct nfsd4_locku *locku = &u->locku; |
dcef0413 | 6878 | struct nfs4_ol_stateid *stp; |
eb82dd39 | 6879 | struct nfsd_file *nf = NULL; |
21179d81 | 6880 | struct file_lock *file_lock = NULL; |
b37ad28b | 6881 | __be32 status; |
b8dd7b9a | 6882 | int err; |
3320fef1 SK |
6883 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
6884 | ||
1da177e4 LT |
6885 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
6886 | (long long) locku->lu_offset, | |
6887 | (long long) locku->lu_length); | |
6888 | ||
6889 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
6890 | return nfserr_inval; | |
6891 | ||
9072d5c6 | 6892 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
3320fef1 SK |
6893 | &locku->lu_stateid, NFS4_LOCK_STID, |
6894 | &stp, nn); | |
9072d5c6 | 6895 | if (status) |
1da177e4 | 6896 | goto out; |
eb82dd39 JL |
6897 | nf = find_any_file(stp->st_stid.sc_file); |
6898 | if (!nf) { | |
f9d7562f | 6899 | status = nfserr_lock_range; |
858cc573 | 6900 | goto put_stateid; |
f9d7562f | 6901 | } |
21179d81 JL |
6902 | file_lock = locks_alloc_lock(); |
6903 | if (!file_lock) { | |
6904 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); | |
6905 | status = nfserr_jukebox; | |
eb82dd39 | 6906 | goto put_file; |
21179d81 | 6907 | } |
6cd90662 | 6908 | |
21179d81 | 6909 | file_lock->fl_type = F_UNLCK; |
aef9583b | 6910 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
21179d81 | 6911 | file_lock->fl_pid = current->tgid; |
eb82dd39 | 6912 | file_lock->fl_file = nf->nf_file; |
21179d81 JL |
6913 | file_lock->fl_flags = FL_POSIX; |
6914 | file_lock->fl_lmops = &nfsd_posix_mng_ops; | |
6915 | file_lock->fl_start = locku->lu_offset; | |
6916 | ||
6917 | file_lock->fl_end = last_byte_offset(locku->lu_offset, | |
6918 | locku->lu_length); | |
6919 | nfs4_transform_lock_offset(file_lock); | |
1da177e4 | 6920 | |
eb82dd39 | 6921 | err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); |
b8dd7b9a | 6922 | if (err) { |
fd85b817 | 6923 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
6924 | goto out_nfserr; |
6925 | } | |
9767feb2 | 6926 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
eb82dd39 JL |
6927 | put_file: |
6928 | nfsd_file_put(nf); | |
858cc573 | 6929 | put_stateid: |
feb9dad5 | 6930 | mutex_unlock(&stp->st_mutex); |
858cc573 | 6931 | nfs4_put_stid(&stp->st_stid); |
1da177e4 | 6932 | out: |
9411b1d4 | 6933 | nfsd4_bump_seqid(cstate, status); |
21179d81 JL |
6934 | if (file_lock) |
6935 | locks_free_lock(file_lock); | |
1da177e4 LT |
6936 | return status; |
6937 | ||
6938 | out_nfserr: | |
b8dd7b9a | 6939 | status = nfserrno(err); |
eb82dd39 | 6940 | goto put_file; |
1da177e4 LT |
6941 | } |
6942 | ||
6943 | /* | |
6944 | * returns | |
f9c00c3a JL |
6945 | * true: locks held by lockowner |
6946 | * false: no locks held by lockowner | |
1da177e4 | 6947 | */ |
f9c00c3a JL |
6948 | static bool |
6949 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) | |
1da177e4 | 6950 | { |
bd61e0a9 | 6951 | struct file_lock *fl; |
f9c00c3a | 6952 | int status = false; |
eb82dd39 | 6953 | struct nfsd_file *nf = find_any_file(fp); |
f9c00c3a | 6954 | struct inode *inode; |
bd61e0a9 | 6955 | struct file_lock_context *flctx; |
f9c00c3a | 6956 | |
eb82dd39 | 6957 | if (!nf) { |
f9c00c3a JL |
6958 | /* Any valid lock stateid should have some sort of access */ |
6959 | WARN_ON_ONCE(1); | |
6960 | return status; | |
6961 | } | |
6962 | ||
eb82dd39 | 6963 | inode = locks_inode(nf->nf_file); |
bd61e0a9 JL |
6964 | flctx = inode->i_flctx; |
6965 | ||
6966 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { | |
6109c850 | 6967 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
6968 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
6969 | if (fl->fl_owner == (fl_owner_t)lowner) { | |
6970 | status = true; | |
6971 | break; | |
6972 | } | |
796dadfd | 6973 | } |
6109c850 | 6974 | spin_unlock(&flctx->flc_lock); |
1da177e4 | 6975 | } |
eb82dd39 | 6976 | nfsd_file_put(nf); |
1da177e4 LT |
6977 | return status; |
6978 | } | |
6979 | ||
b37ad28b | 6980 | __be32 |
b591480b BF |
6981 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
6982 | struct nfsd4_compound_state *cstate, | |
eb69853d | 6983 | union nfsd4_op_u *u) |
1da177e4 | 6984 | { |
eb69853d | 6985 | struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; |
1da177e4 | 6986 | clientid_t *clid = &rlockowner->rl_clientid; |
882e9d25 JL |
6987 | struct nfs4_stateowner *sop; |
6988 | struct nfs4_lockowner *lo = NULL; | |
dcef0413 | 6989 | struct nfs4_ol_stateid *stp; |
1da177e4 | 6990 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
d4f0489f | 6991 | unsigned int hashval = ownerstr_hashval(owner); |
b37ad28b | 6992 | __be32 status; |
7f2210fa | 6993 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
c58c6610 | 6994 | struct nfs4_client *clp; |
88584818 | 6995 | LIST_HEAD (reaplist); |
1da177e4 LT |
6996 | |
6997 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
6998 | clid->cl_boot, clid->cl_id); | |
6999 | ||
b7342204 | 7000 | status = lookup_clientid(clid, cstate, nn, false); |
9b2ef62b | 7001 | if (status) |
51f5e783 | 7002 | return status; |
9b2ef62b | 7003 | |
d4f0489f | 7004 | clp = cstate->clp; |
fd44907c | 7005 | /* Find the matching lock stateowner */ |
d4f0489f | 7006 | spin_lock(&clp->cl_lock); |
882e9d25 | 7007 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
d4f0489f | 7008 | so_strhash) { |
fd44907c | 7009 | |
882e9d25 JL |
7010 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
7011 | continue; | |
fd44907c | 7012 | |
882e9d25 JL |
7013 | /* see if there are still any locks associated with it */ |
7014 | lo = lockowner(sop); | |
7015 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { | |
7016 | if (check_for_locks(stp->st_stid.sc_file, lo)) { | |
7017 | status = nfserr_locks_held; | |
7018 | spin_unlock(&clp->cl_lock); | |
51f5e783 | 7019 | return status; |
882e9d25 | 7020 | } |
5adfd885 | 7021 | } |
882e9d25 | 7022 | |
b5971afa | 7023 | nfs4_get_stateowner(sop); |
882e9d25 | 7024 | break; |
1da177e4 | 7025 | } |
88584818 CL |
7026 | if (!lo) { |
7027 | spin_unlock(&clp->cl_lock); | |
7028 | return status; | |
7029 | } | |
7030 | ||
7031 | unhash_lockowner_locked(lo); | |
7032 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
7033 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
7034 | struct nfs4_ol_stateid, | |
7035 | st_perstateowner); | |
7036 | WARN_ON(!unhash_lock_stateid(stp)); | |
7037 | put_ol_stateid_locked(stp, &reaplist); | |
7038 | } | |
c58c6610 | 7039 | spin_unlock(&clp->cl_lock); |
88584818 | 7040 | free_ol_stateid_reaplist(&reaplist); |
68ef3bc3 | 7041 | remove_blocked_locks(lo); |
88584818 CL |
7042 | nfs4_put_stateowner(&lo->lo_owner); |
7043 | ||
1da177e4 LT |
7044 | return status; |
7045 | } | |
7046 | ||
7047 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 7048 | alloc_reclaim(void) |
1da177e4 | 7049 | { |
a55370a3 | 7050 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
7051 | } |
7052 | ||
0ce0c2b5 | 7053 | bool |
6b189105 | 7054 | nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) |
c7b9a459 | 7055 | { |
0ce0c2b5 | 7056 | struct nfs4_client_reclaim *crp; |
c7b9a459 | 7057 | |
52e19c09 | 7058 | crp = nfsd4_find_reclaim_client(name, nn); |
0ce0c2b5 | 7059 | return (crp && crp->cr_clp); |
c7b9a459 N |
7060 | } |
7061 | ||
1da177e4 LT |
7062 | /* |
7063 | * failure => all reset bets are off, nfserr_no_grace... | |
6b189105 SM |
7064 | * |
7065 | * The caller is responsible for freeing name.data if NULL is returned (it | |
7066 | * will be freed in nfs4_remove_reclaim_record in the normal case). | |
1da177e4 | 7067 | */ |
772a9bbb | 7068 | struct nfs4_client_reclaim * |
6ee95d1c SM |
7069 | nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, |
7070 | struct nfsd_net *nn) | |
1da177e4 LT |
7071 | { |
7072 | unsigned int strhashval; | |
772a9bbb | 7073 | struct nfs4_client_reclaim *crp; |
1da177e4 | 7074 | |
6b189105 | 7075 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", name.len, name.data); |
a55370a3 | 7076 | crp = alloc_reclaim(); |
772a9bbb JL |
7077 | if (crp) { |
7078 | strhashval = clientstr_hashval(name); | |
7079 | INIT_LIST_HEAD(&crp->cr_strhash); | |
52e19c09 | 7080 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
6b189105 SM |
7081 | crp->cr_name.data = name.data; |
7082 | crp->cr_name.len = name.len; | |
6ee95d1c SM |
7083 | crp->cr_princhash.data = princhash.data; |
7084 | crp->cr_princhash.len = princhash.len; | |
0ce0c2b5 | 7085 | crp->cr_clp = NULL; |
52e19c09 | 7086 | nn->reclaim_str_hashtbl_size++; |
772a9bbb JL |
7087 | } |
7088 | return crp; | |
1da177e4 LT |
7089 | } |
7090 | ||
ce30e539 | 7091 | void |
52e19c09 | 7092 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
ce30e539 JL |
7093 | { |
7094 | list_del(&crp->cr_strhash); | |
6b189105 | 7095 | kfree(crp->cr_name.data); |
6ee95d1c | 7096 | kfree(crp->cr_princhash.data); |
ce30e539 | 7097 | kfree(crp); |
52e19c09 | 7098 | nn->reclaim_str_hashtbl_size--; |
ce30e539 JL |
7099 | } |
7100 | ||
2a4317c5 | 7101 | void |
52e19c09 | 7102 | nfs4_release_reclaim(struct nfsd_net *nn) |
1da177e4 LT |
7103 | { |
7104 | struct nfs4_client_reclaim *crp = NULL; | |
7105 | int i; | |
7106 | ||
1da177e4 | 7107 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
52e19c09 SK |
7108 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
7109 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, | |
1da177e4 | 7110 | struct nfs4_client_reclaim, cr_strhash); |
52e19c09 | 7111 | nfs4_remove_reclaim_record(crp, nn); |
1da177e4 LT |
7112 | } |
7113 | } | |
063b0fb9 | 7114 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
1da177e4 LT |
7115 | } |
7116 | ||
7117 | /* | |
7118 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
2a4317c5 | 7119 | struct nfs4_client_reclaim * |
6b189105 | 7120 | nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) |
1da177e4 LT |
7121 | { |
7122 | unsigned int strhashval; | |
1da177e4 LT |
7123 | struct nfs4_client_reclaim *crp = NULL; |
7124 | ||
6b189105 | 7125 | dprintk("NFSD: nfs4_find_reclaim_client for name %.*s\n", name.len, name.data); |
1da177e4 | 7126 | |
6b189105 | 7127 | strhashval = clientstr_hashval(name); |
52e19c09 | 7128 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
6b189105 | 7129 | if (compare_blob(&crp->cr_name, &name) == 0) { |
1da177e4 LT |
7130 | return crp; |
7131 | } | |
7132 | } | |
7133 | return NULL; | |
7134 | } | |
7135 | ||
7136 | /* | |
7137 | * Called from OPEN. Look for clientid in reclaim list. | |
7138 | */ | |
b37ad28b | 7139 | __be32 |
0fe492db TM |
7140 | nfs4_check_open_reclaim(clientid_t *clid, |
7141 | struct nfsd4_compound_state *cstate, | |
7142 | struct nfsd_net *nn) | |
1da177e4 | 7143 | { |
0fe492db | 7144 | __be32 status; |
a52d726b JL |
7145 | |
7146 | /* find clientid in conf_id_hashtbl */ | |
b7342204 | 7147 | status = lookup_clientid(clid, cstate, nn, false); |
0fe492db | 7148 | if (status) |
a52d726b JL |
7149 | return nfserr_reclaim_bad; |
7150 | ||
3b3e7b72 JL |
7151 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
7152 | return nfserr_no_grace; | |
7153 | ||
0fe492db TM |
7154 | if (nfsd4_client_record_check(cstate->clp)) |
7155 | return nfserr_reclaim_bad; | |
7156 | ||
7157 | return nfs_ok; | |
1da177e4 LT |
7158 | } |
7159 | ||
65178db4 | 7160 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
016200c3 JL |
7161 | static inline void |
7162 | put_client(struct nfs4_client *clp) | |
7163 | { | |
14ed14cc | 7164 | atomic_dec(&clp->cl_rpc_users); |
016200c3 JL |
7165 | } |
7166 | ||
285abdee JL |
7167 | static struct nfs4_client * |
7168 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) | |
7169 | { | |
7170 | struct nfs4_client *clp; | |
7171 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7172 | nfsd_net_id); | |
7173 | ||
7174 | if (!nfsd_netns_ready(nn)) | |
7175 | return NULL; | |
7176 | ||
7177 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7178 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) | |
7179 | return clp; | |
7180 | } | |
7181 | return NULL; | |
7182 | } | |
7183 | ||
7ec0e36f | 7184 | u64 |
285abdee | 7185 | nfsd_inject_print_clients(void) |
7ec0e36f JL |
7186 | { |
7187 | struct nfs4_client *clp; | |
7188 | u64 count = 0; | |
7189 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7190 | nfsd_net_id); | |
7191 | char buf[INET6_ADDRSTRLEN]; | |
7192 | ||
7193 | if (!nfsd_netns_ready(nn)) | |
7194 | return 0; | |
7195 | ||
7196 | spin_lock(&nn->client_lock); | |
7197 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7198 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); | |
7199 | pr_info("NFS Client: %s\n", buf); | |
7200 | ++count; | |
7201 | } | |
7202 | spin_unlock(&nn->client_lock); | |
7203 | ||
7204 | return count; | |
7205 | } | |
65178db4 | 7206 | |
a0926d15 | 7207 | u64 |
285abdee | 7208 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
a0926d15 JL |
7209 | { |
7210 | u64 count = 0; | |
7211 | struct nfs4_client *clp; | |
7212 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7213 | nfsd_net_id); | |
7214 | ||
7215 | if (!nfsd_netns_ready(nn)) | |
7216 | return count; | |
7217 | ||
7218 | spin_lock(&nn->client_lock); | |
7219 | clp = nfsd_find_client(addr, addr_size); | |
7220 | if (clp) { | |
7221 | if (mark_client_expired_locked(clp) == nfs_ok) | |
7222 | ++count; | |
7223 | else | |
7224 | clp = NULL; | |
7225 | } | |
7226 | spin_unlock(&nn->client_lock); | |
7227 | ||
7228 | if (clp) | |
7229 | expire_client(clp); | |
7230 | ||
7231 | return count; | |
7232 | } | |
7233 | ||
69fc9edf | 7234 | u64 |
285abdee | 7235 | nfsd_inject_forget_clients(u64 max) |
69fc9edf JL |
7236 | { |
7237 | u64 count = 0; | |
7238 | struct nfs4_client *clp, *next; | |
7239 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7240 | nfsd_net_id); | |
7241 | LIST_HEAD(reaplist); | |
7242 | ||
7243 | if (!nfsd_netns_ready(nn)) | |
7244 | return count; | |
7245 | ||
7246 | spin_lock(&nn->client_lock); | |
7247 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7248 | if (mark_client_expired_locked(clp) == nfs_ok) { | |
7249 | list_add(&clp->cl_lru, &reaplist); | |
7250 | if (max != 0 && ++count >= max) | |
7251 | break; | |
7252 | } | |
7253 | } | |
7254 | spin_unlock(&nn->client_lock); | |
7255 | ||
7256 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) | |
7257 | expire_client(clp); | |
7258 | ||
7259 | return count; | |
7260 | } | |
7261 | ||
184c1847 BS |
7262 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
7263 | const char *type) | |
7264 | { | |
7265 | char buf[INET6_ADDRSTRLEN]; | |
0a5c33e2 | 7266 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
184c1847 BS |
7267 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
7268 | } | |
7269 | ||
016200c3 JL |
7270 | static void |
7271 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, | |
7272 | struct list_head *collect) | |
7273 | { | |
7274 | struct nfs4_client *clp = lst->st_stid.sc_client; | |
7275 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7276 | nfsd_net_id); | |
7277 | ||
7278 | if (!collect) | |
7279 | return; | |
7280 | ||
7281 | lockdep_assert_held(&nn->client_lock); | |
14ed14cc | 7282 | atomic_inc(&clp->cl_rpc_users); |
016200c3 JL |
7283 | list_add(&lst->st_locks, collect); |
7284 | } | |
7285 | ||
3c87b9b7 | 7286 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
3738d50e | 7287 | struct list_head *collect, |
e8568739 | 7288 | bool (*func)(struct nfs4_ol_stateid *)) |
fc29171f BS |
7289 | { |
7290 | struct nfs4_openowner *oop; | |
fc29171f | 7291 | struct nfs4_ol_stateid *stp, *st_next; |
3c87b9b7 | 7292 | struct nfs4_ol_stateid *lst, *lst_next; |
fc29171f BS |
7293 | u64 count = 0; |
7294 | ||
016200c3 | 7295 | spin_lock(&clp->cl_lock); |
fc29171f | 7296 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
3c87b9b7 TM |
7297 | list_for_each_entry_safe(stp, st_next, |
7298 | &oop->oo_owner.so_stateids, st_perstateowner) { | |
7299 | list_for_each_entry_safe(lst, lst_next, | |
7300 | &stp->st_locks, st_locks) { | |
3738d50e | 7301 | if (func) { |
e8568739 JL |
7302 | if (func(lst)) |
7303 | nfsd_inject_add_lock_to_list(lst, | |
7304 | collect); | |
3738d50e | 7305 | } |
016200c3 JL |
7306 | ++count; |
7307 | /* | |
7308 | * Despite the fact that these functions deal | |
7309 | * with 64-bit integers for "count", we must | |
7310 | * ensure that it doesn't blow up the | |
14ed14cc | 7311 | * clp->cl_rpc_users. Throw a warning if we |
016200c3 JL |
7312 | * start to approach INT_MAX here. |
7313 | */ | |
7314 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
7315 | if (count == max) | |
7316 | goto out; | |
fc29171f BS |
7317 | } |
7318 | } | |
7319 | } | |
016200c3 JL |
7320 | out: |
7321 | spin_unlock(&clp->cl_lock); | |
fc29171f BS |
7322 | |
7323 | return count; | |
7324 | } | |
7325 | ||
016200c3 JL |
7326 | static u64 |
7327 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, | |
7328 | u64 max) | |
fc29171f | 7329 | { |
016200c3 | 7330 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
fc29171f BS |
7331 | } |
7332 | ||
016200c3 JL |
7333 | static u64 |
7334 | nfsd_print_client_locks(struct nfs4_client *clp) | |
184c1847 | 7335 | { |
016200c3 | 7336 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
184c1847 BS |
7337 | nfsd_print_count(clp, count, "locked files"); |
7338 | return count; | |
7339 | } | |
7340 | ||
016200c3 | 7341 | u64 |
285abdee | 7342 | nfsd_inject_print_locks(void) |
016200c3 JL |
7343 | { |
7344 | struct nfs4_client *clp; | |
7345 | u64 count = 0; | |
7346 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7347 | nfsd_net_id); | |
7348 | ||
7349 | if (!nfsd_netns_ready(nn)) | |
7350 | return 0; | |
7351 | ||
7352 | spin_lock(&nn->client_lock); | |
7353 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
7354 | count += nfsd_print_client_locks(clp); | |
7355 | spin_unlock(&nn->client_lock); | |
7356 | ||
7357 | return count; | |
7358 | } | |
7359 | ||
7360 | static void | |
7361 | nfsd_reap_locks(struct list_head *reaplist) | |
7362 | { | |
7363 | struct nfs4_client *clp; | |
7364 | struct nfs4_ol_stateid *stp, *next; | |
7365 | ||
7366 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { | |
7367 | list_del_init(&stp->st_locks); | |
7368 | clp = stp->st_stid.sc_client; | |
7369 | nfs4_put_stid(&stp->st_stid); | |
7370 | put_client(clp); | |
7371 | } | |
7372 | } | |
7373 | ||
7374 | u64 | |
285abdee | 7375 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
016200c3 JL |
7376 | { |
7377 | unsigned int count = 0; | |
7378 | struct nfs4_client *clp; | |
7379 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7380 | nfsd_net_id); | |
7381 | LIST_HEAD(reaplist); | |
7382 | ||
7383 | if (!nfsd_netns_ready(nn)) | |
7384 | return count; | |
7385 | ||
7386 | spin_lock(&nn->client_lock); | |
7387 | clp = nfsd_find_client(addr, addr_size); | |
7388 | if (clp) | |
7389 | count = nfsd_collect_client_locks(clp, &reaplist, 0); | |
7390 | spin_unlock(&nn->client_lock); | |
7391 | nfsd_reap_locks(&reaplist); | |
7392 | return count; | |
7393 | } | |
7394 | ||
7395 | u64 | |
285abdee | 7396 | nfsd_inject_forget_locks(u64 max) |
016200c3 JL |
7397 | { |
7398 | u64 count = 0; | |
7399 | struct nfs4_client *clp; | |
7400 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7401 | nfsd_net_id); | |
7402 | LIST_HEAD(reaplist); | |
7403 | ||
7404 | if (!nfsd_netns_ready(nn)) | |
7405 | return count; | |
7406 | ||
7407 | spin_lock(&nn->client_lock); | |
7408 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7409 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); | |
7410 | if (max != 0 && count >= max) | |
7411 | break; | |
7412 | } | |
7413 | spin_unlock(&nn->client_lock); | |
7414 | nfsd_reap_locks(&reaplist); | |
7415 | return count; | |
7416 | } | |
7417 | ||
82e05efa JL |
7418 | static u64 |
7419 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, | |
7420 | struct list_head *collect, | |
7421 | void (*func)(struct nfs4_openowner *)) | |
4dbdbda8 BS |
7422 | { |
7423 | struct nfs4_openowner *oop, *next; | |
82e05efa JL |
7424 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
7425 | nfsd_net_id); | |
4dbdbda8 BS |
7426 | u64 count = 0; |
7427 | ||
82e05efa JL |
7428 | lockdep_assert_held(&nn->client_lock); |
7429 | ||
7430 | spin_lock(&clp->cl_lock); | |
4dbdbda8 | 7431 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
82e05efa | 7432 | if (func) { |
4dbdbda8 | 7433 | func(oop); |
82e05efa | 7434 | if (collect) { |
14ed14cc | 7435 | atomic_inc(&clp->cl_rpc_users); |
82e05efa JL |
7436 | list_add(&oop->oo_perclient, collect); |
7437 | } | |
7438 | } | |
7439 | ++count; | |
7440 | /* | |
7441 | * Despite the fact that these functions deal with | |
7442 | * 64-bit integers for "count", we must ensure that | |
14ed14cc | 7443 | * it doesn't blow up the clp->cl_rpc_users. Throw a |
82e05efa JL |
7444 | * warning if we start to approach INT_MAX here. |
7445 | */ | |
7446 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
7447 | if (count == max) | |
4dbdbda8 BS |
7448 | break; |
7449 | } | |
82e05efa JL |
7450 | spin_unlock(&clp->cl_lock); |
7451 | ||
7452 | return count; | |
7453 | } | |
7454 | ||
7455 | static u64 | |
7456 | nfsd_print_client_openowners(struct nfs4_client *clp) | |
7457 | { | |
7458 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); | |
7459 | ||
7460 | nfsd_print_count(clp, count, "openowners"); | |
7461 | return count; | |
7462 | } | |
7463 | ||
7464 | static u64 | |
7465 | nfsd_collect_client_openowners(struct nfs4_client *clp, | |
7466 | struct list_head *collect, u64 max) | |
7467 | { | |
7468 | return nfsd_foreach_client_openowner(clp, max, collect, | |
7469 | unhash_openowner_locked); | |
7470 | } | |
7471 | ||
7472 | u64 | |
285abdee | 7473 | nfsd_inject_print_openowners(void) |
82e05efa JL |
7474 | { |
7475 | struct nfs4_client *clp; | |
7476 | u64 count = 0; | |
7477 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7478 | nfsd_net_id); | |
7479 | ||
7480 | if (!nfsd_netns_ready(nn)) | |
7481 | return 0; | |
7482 | ||
7483 | spin_lock(&nn->client_lock); | |
7484 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
7485 | count += nfsd_print_client_openowners(clp); | |
7486 | spin_unlock(&nn->client_lock); | |
4dbdbda8 BS |
7487 | |
7488 | return count; | |
7489 | } | |
7490 | ||
82e05efa JL |
7491 | static void |
7492 | nfsd_reap_openowners(struct list_head *reaplist) | |
7493 | { | |
7494 | struct nfs4_client *clp; | |
7495 | struct nfs4_openowner *oop, *next; | |
7496 | ||
7497 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { | |
7498 | list_del_init(&oop->oo_perclient); | |
7499 | clp = oop->oo_owner.so_client; | |
7500 | release_openowner(oop); | |
7501 | put_client(clp); | |
7502 | } | |
7503 | } | |
7504 | ||
7505 | u64 | |
285abdee JL |
7506 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
7507 | size_t addr_size) | |
4dbdbda8 | 7508 | { |
82e05efa JL |
7509 | unsigned int count = 0; |
7510 | struct nfs4_client *clp; | |
7511 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7512 | nfsd_net_id); | |
7513 | LIST_HEAD(reaplist); | |
7514 | ||
7515 | if (!nfsd_netns_ready(nn)) | |
7516 | return count; | |
7517 | ||
7518 | spin_lock(&nn->client_lock); | |
7519 | clp = nfsd_find_client(addr, addr_size); | |
7520 | if (clp) | |
7521 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); | |
7522 | spin_unlock(&nn->client_lock); | |
7523 | nfsd_reap_openowners(&reaplist); | |
7524 | return count; | |
4dbdbda8 BS |
7525 | } |
7526 | ||
82e05efa | 7527 | u64 |
285abdee | 7528 | nfsd_inject_forget_openowners(u64 max) |
184c1847 | 7529 | { |
82e05efa JL |
7530 | u64 count = 0; |
7531 | struct nfs4_client *clp; | |
7532 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7533 | nfsd_net_id); | |
7534 | LIST_HEAD(reaplist); | |
7535 | ||
7536 | if (!nfsd_netns_ready(nn)) | |
7537 | return count; | |
7538 | ||
7539 | spin_lock(&nn->client_lock); | |
7540 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7541 | count += nfsd_collect_client_openowners(clp, &reaplist, | |
7542 | max - count); | |
7543 | if (max != 0 && count >= max) | |
7544 | break; | |
7545 | } | |
7546 | spin_unlock(&nn->client_lock); | |
7547 | nfsd_reap_openowners(&reaplist); | |
184c1847 BS |
7548 | return count; |
7549 | } | |
7550 | ||
269de30f BS |
7551 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
7552 | struct list_head *victims) | |
7553 | { | |
7554 | struct nfs4_delegation *dp, *next; | |
98d5c7c5 JL |
7555 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
7556 | nfsd_net_id); | |
269de30f BS |
7557 | u64 count = 0; |
7558 | ||
98d5c7c5 JL |
7559 | lockdep_assert_held(&nn->client_lock); |
7560 | ||
7561 | spin_lock(&state_lock); | |
269de30f | 7562 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
dff1399f JL |
7563 | if (victims) { |
7564 | /* | |
7565 | * It's not safe to mess with delegations that have a | |
7566 | * non-zero dl_time. They might have already been broken | |
7567 | * and could be processed by the laundromat outside of | |
7568 | * the state_lock. Just leave them be. | |
7569 | */ | |
7570 | if (dp->dl_time != 0) | |
7571 | continue; | |
7572 | ||
14ed14cc | 7573 | atomic_inc(&clp->cl_rpc_users); |
3fcbbd24 | 7574 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7575 | list_add(&dp->dl_recall_lru, victims); |
dff1399f | 7576 | } |
98d5c7c5 JL |
7577 | ++count; |
7578 | /* | |
7579 | * Despite the fact that these functions deal with | |
7580 | * 64-bit integers for "count", we must ensure that | |
14ed14cc | 7581 | * it doesn't blow up the clp->cl_rpc_users. Throw a |
98d5c7c5 JL |
7582 | * warning if we start to approach INT_MAX here. |
7583 | */ | |
7584 | WARN_ON_ONCE(count == (INT_MAX / 2)); | |
7585 | if (count == max) | |
269de30f BS |
7586 | break; |
7587 | } | |
98d5c7c5 | 7588 | spin_unlock(&state_lock); |
269de30f BS |
7589 | return count; |
7590 | } | |
7591 | ||
98d5c7c5 JL |
7592 | static u64 |
7593 | nfsd_print_client_delegations(struct nfs4_client *clp) | |
269de30f | 7594 | { |
98d5c7c5 | 7595 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
269de30f | 7596 | |
98d5c7c5 JL |
7597 | nfsd_print_count(clp, count, "delegations"); |
7598 | return count; | |
7599 | } | |
7600 | ||
7601 | u64 | |
285abdee | 7602 | nfsd_inject_print_delegations(void) |
98d5c7c5 JL |
7603 | { |
7604 | struct nfs4_client *clp; | |
7605 | u64 count = 0; | |
7606 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7607 | nfsd_net_id); | |
7608 | ||
7609 | if (!nfsd_netns_ready(nn)) | |
7610 | return 0; | |
269de30f | 7611 | |
98d5c7c5 JL |
7612 | spin_lock(&nn->client_lock); |
7613 | list_for_each_entry(clp, &nn->client_lru, cl_lru) | |
7614 | count += nfsd_print_client_delegations(clp); | |
7615 | spin_unlock(&nn->client_lock); | |
7616 | ||
7617 | return count; | |
7618 | } | |
7619 | ||
7620 | static void | |
7621 | nfsd_forget_delegations(struct list_head *reaplist) | |
7622 | { | |
7623 | struct nfs4_client *clp; | |
7624 | struct nfs4_delegation *dp, *next; | |
7625 | ||
7626 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { | |
2d4a532d | 7627 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 | 7628 | clp = dp->dl_stid.sc_client; |
3bd64a5b | 7629 | revoke_delegation(dp); |
98d5c7c5 | 7630 | put_client(clp); |
2d4a532d | 7631 | } |
98d5c7c5 JL |
7632 | } |
7633 | ||
7634 | u64 | |
285abdee JL |
7635 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
7636 | size_t addr_size) | |
98d5c7c5 JL |
7637 | { |
7638 | u64 count = 0; | |
7639 | struct nfs4_client *clp; | |
7640 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7641 | nfsd_net_id); | |
7642 | LIST_HEAD(reaplist); | |
7643 | ||
7644 | if (!nfsd_netns_ready(nn)) | |
7645 | return count; | |
7646 | ||
7647 | spin_lock(&nn->client_lock); | |
7648 | clp = nfsd_find_client(addr, addr_size); | |
7649 | if (clp) | |
7650 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7651 | spin_unlock(&nn->client_lock); | |
7652 | ||
7653 | nfsd_forget_delegations(&reaplist); | |
7654 | return count; | |
7655 | } | |
269de30f | 7656 | |
98d5c7c5 | 7657 | u64 |
285abdee | 7658 | nfsd_inject_forget_delegations(u64 max) |
98d5c7c5 JL |
7659 | { |
7660 | u64 count = 0; | |
7661 | struct nfs4_client *clp; | |
7662 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7663 | nfsd_net_id); | |
7664 | LIST_HEAD(reaplist); | |
7665 | ||
7666 | if (!nfsd_netns_ready(nn)) | |
7667 | return count; | |
7668 | ||
7669 | spin_lock(&nn->client_lock); | |
7670 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { | |
7671 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7672 | if (max != 0 && count >= max) | |
7673 | break; | |
7674 | } | |
7675 | spin_unlock(&nn->client_lock); | |
7676 | nfsd_forget_delegations(&reaplist); | |
269de30f BS |
7677 | return count; |
7678 | } | |
7679 | ||
98d5c7c5 JL |
7680 | static void |
7681 | nfsd_recall_delegations(struct list_head *reaplist) | |
269de30f | 7682 | { |
98d5c7c5 JL |
7683 | struct nfs4_client *clp; |
7684 | struct nfs4_delegation *dp, *next; | |
269de30f | 7685 | |
98d5c7c5 | 7686 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
dff1399f | 7687 | list_del_init(&dp->dl_recall_lru); |
98d5c7c5 JL |
7688 | clp = dp->dl_stid.sc_client; |
7689 | /* | |
7690 | * We skipped all entries that had a zero dl_time before, | |
7691 | * so we can now reset the dl_time back to 0. If a delegation | |
7692 | * break comes in now, then it won't make any difference since | |
7693 | * we're recalling it either way. | |
7694 | */ | |
7695 | spin_lock(&state_lock); | |
dff1399f | 7696 | dp->dl_time = 0; |
98d5c7c5 | 7697 | spin_unlock(&state_lock); |
269de30f | 7698 | nfsd_break_one_deleg(dp); |
98d5c7c5 | 7699 | put_client(clp); |
dff1399f | 7700 | } |
98d5c7c5 | 7701 | } |
269de30f | 7702 | |
98d5c7c5 | 7703 | u64 |
285abdee | 7704 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
98d5c7c5 JL |
7705 | size_t addr_size) |
7706 | { | |
7707 | u64 count = 0; | |
7708 | struct nfs4_client *clp; | |
7709 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7710 | nfsd_net_id); | |
7711 | LIST_HEAD(reaplist); | |
7712 | ||
7713 | if (!nfsd_netns_ready(nn)) | |
7714 | return count; | |
7715 | ||
7716 | spin_lock(&nn->client_lock); | |
7717 | clp = nfsd_find_client(addr, addr_size); | |
7718 | if (clp) | |
7719 | count = nfsd_find_all_delegations(clp, 0, &reaplist); | |
7720 | spin_unlock(&nn->client_lock); | |
7721 | ||
7722 | nfsd_recall_delegations(&reaplist); | |
269de30f BS |
7723 | return count; |
7724 | } | |
7725 | ||
98d5c7c5 | 7726 | u64 |
285abdee | 7727 | nfsd_inject_recall_delegations(u64 max) |
184c1847 BS |
7728 | { |
7729 | u64 count = 0; | |
98d5c7c5 JL |
7730 | struct nfs4_client *clp, *next; |
7731 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, | |
7732 | nfsd_net_id); | |
7733 | LIST_HEAD(reaplist); | |
184c1847 | 7734 | |
98d5c7c5 JL |
7735 | if (!nfsd_netns_ready(nn)) |
7736 | return count; | |
184c1847 | 7737 | |
98d5c7c5 JL |
7738 | spin_lock(&nn->client_lock); |
7739 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { | |
7740 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); | |
7741 | if (max != 0 && ++count >= max) | |
7742 | break; | |
7743 | } | |
7744 | spin_unlock(&nn->client_lock); | |
7745 | nfsd_recall_delegations(&reaplist); | |
184c1847 BS |
7746 | return count; |
7747 | } | |
65178db4 BS |
7748 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
7749 | ||
c2f1a551 MS |
7750 | /* |
7751 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
7752 | * client may quite reasonably hang on to a delegation as long as it has | |
7753 | * the inode cached. This becomes an obvious problem the first time a | |
7754 | * client's inode cache approaches the size of the server's total memory. | |
7755 | * | |
7756 | * For now we avoid this problem by imposing a hard limit on the number | |
7757 | * of delegations, which varies according to the server's memory size. | |
7758 | */ | |
7759 | static void | |
7760 | set_max_delegations(void) | |
7761 | { | |
7762 | /* | |
7763 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
7764 | * estimates suggest that in the worst case (where every delegation | |
7765 | * is for a different inode), a delegation could take about 1.5K, | |
7766 | * giving a worst case usage of about 6% of memory. | |
7767 | */ | |
7768 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
7769 | } | |
7770 | ||
d85ed443 | 7771 | static int nfs4_state_create_net(struct net *net) |
8daae4dc SK |
7772 | { |
7773 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7774 | int i; | |
7775 | ||
6da2ec56 KC |
7776 | nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7777 | sizeof(struct list_head), | |
7778 | GFP_KERNEL); | |
8daae4dc | 7779 | if (!nn->conf_id_hashtbl) |
382a62e7 | 7780 | goto err; |
6da2ec56 KC |
7781 | nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
7782 | sizeof(struct list_head), | |
7783 | GFP_KERNEL); | |
0a7ec377 SK |
7784 | if (!nn->unconf_id_hashtbl) |
7785 | goto err_unconf_id; | |
6da2ec56 KC |
7786 | nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, |
7787 | sizeof(struct list_head), | |
7788 | GFP_KERNEL); | |
1872de0e SK |
7789 | if (!nn->sessionid_hashtbl) |
7790 | goto err_sessionid; | |
8daae4dc | 7791 | |
382a62e7 | 7792 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
8daae4dc | 7793 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
0a7ec377 | 7794 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
382a62e7 | 7795 | } |
1872de0e SK |
7796 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
7797 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); | |
382a62e7 | 7798 | nn->conf_name_tree = RB_ROOT; |
a99454aa | 7799 | nn->unconf_name_tree = RB_ROOT; |
9cc76801 | 7800 | nn->boot_time = ktime_get_real_seconds(); |
81833de1 VA |
7801 | nn->grace_ended = false; |
7802 | nn->nfsd4_manager.block_opens = true; | |
7803 | INIT_LIST_HEAD(&nn->nfsd4_manager.list); | |
5ed58bb2 | 7804 | INIT_LIST_HEAD(&nn->client_lru); |
73758fed | 7805 | INIT_LIST_HEAD(&nn->close_lru); |
e8c69d17 | 7806 | INIT_LIST_HEAD(&nn->del_recall_lru); |
c9a49628 | 7807 | spin_lock_init(&nn->client_lock); |
e0639dc5 OK |
7808 | spin_lock_init(&nn->s2s_cp_lock); |
7809 | idr_init(&nn->s2s_cp_stateids); | |
8daae4dc | 7810 | |
0cc11a61 JL |
7811 | spin_lock_init(&nn->blocked_locks_lock); |
7812 | INIT_LIST_HEAD(&nn->blocked_locks_lru); | |
7813 | ||
09121281 | 7814 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
d85ed443 | 7815 | get_net(net); |
09121281 | 7816 | |
8daae4dc | 7817 | return 0; |
382a62e7 | 7818 | |
1872de0e | 7819 | err_sessionid: |
9b531137 | 7820 | kfree(nn->unconf_id_hashtbl); |
0a7ec377 SK |
7821 | err_unconf_id: |
7822 | kfree(nn->conf_id_hashtbl); | |
382a62e7 SK |
7823 | err: |
7824 | return -ENOMEM; | |
8daae4dc SK |
7825 | } |
7826 | ||
7827 | static void | |
4dce0ac9 | 7828 | nfs4_state_destroy_net(struct net *net) |
8daae4dc SK |
7829 | { |
7830 | int i; | |
7831 | struct nfs4_client *clp = NULL; | |
7832 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
7833 | ||
7834 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
7835 | while (!list_empty(&nn->conf_id_hashtbl[i])) { | |
7836 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7837 | destroy_client(clp); | |
7838 | } | |
7839 | } | |
a99454aa | 7840 | |
68ef3bc3 JL |
7841 | WARN_ON(!list_empty(&nn->blocked_locks_lru)); |
7842 | ||
2b905635 KM |
7843 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
7844 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { | |
7845 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
7846 | destroy_client(clp); | |
7847 | } | |
a99454aa SK |
7848 | } |
7849 | ||
1872de0e | 7850 | kfree(nn->sessionid_hashtbl); |
0a7ec377 | 7851 | kfree(nn->unconf_id_hashtbl); |
8daae4dc | 7852 | kfree(nn->conf_id_hashtbl); |
4dce0ac9 | 7853 | put_net(net); |
8daae4dc SK |
7854 | } |
7855 | ||
f252bc68 | 7856 | int |
d85ed443 | 7857 | nfs4_state_start_net(struct net *net) |
ac4d8ff2 | 7858 | { |
5e1533c7 | 7859 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
b5a1a81e BF |
7860 | int ret; |
7861 | ||
d85ed443 | 7862 | ret = nfs4_state_create_net(net); |
8daae4dc SK |
7863 | if (ret) |
7864 | return ret; | |
d4318acd JL |
7865 | locks_start_grace(net, &nn->nfsd4_manager); |
7866 | nfsd4_client_tracking_init(net); | |
362063a5 SM |
7867 | if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) |
7868 | goto skip_grace; | |
20b7d86f | 7869 | printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", |
7e981a8a | 7870 | nn->nfsd4_grace, net->ns.inum); |
5284b44e | 7871 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
d85ed443 | 7872 | return 0; |
362063a5 SM |
7873 | |
7874 | skip_grace: | |
7875 | printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", | |
7876 | net->ns.inum); | |
7877 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); | |
7878 | nfsd4_end_grace(nn); | |
7879 | return 0; | |
d85ed443 SK |
7880 | } |
7881 | ||
7882 | /* initialization to perform when the nfsd service is started: */ | |
7883 | ||
7884 | int | |
7885 | nfs4_state_start(void) | |
7886 | { | |
7887 | int ret; | |
7888 | ||
51a54568 | 7889 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
a6d6b781 JL |
7890 | if (laundry_wq == NULL) { |
7891 | ret = -ENOMEM; | |
a26dd64f | 7892 | goto out; |
a6d6b781 | 7893 | } |
b5a1a81e BF |
7894 | ret = nfsd4_create_callback_queue(); |
7895 | if (ret) | |
7896 | goto out_free_laundry; | |
09121281 | 7897 | |
c2f1a551 | 7898 | set_max_delegations(); |
b5a1a81e | 7899 | return 0; |
d85ed443 | 7900 | |
b5a1a81e BF |
7901 | out_free_laundry: |
7902 | destroy_workqueue(laundry_wq); | |
a26dd64f | 7903 | out: |
b5a1a81e | 7904 | return ret; |
1da177e4 LT |
7905 | } |
7906 | ||
f252bc68 | 7907 | void |
4dce0ac9 | 7908 | nfs4_state_shutdown_net(struct net *net) |
1da177e4 | 7909 | { |
1da177e4 | 7910 | struct nfs4_delegation *dp = NULL; |
1da177e4 | 7911 | struct list_head *pos, *next, reaplist; |
4dce0ac9 | 7912 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1da177e4 | 7913 | |
4dce0ac9 SK |
7914 | cancel_delayed_work_sync(&nn->laundromat_work); |
7915 | locks_end_grace(&nn->nfsd4_manager); | |
ac55fdc4 | 7916 | |
1da177e4 | 7917 | INIT_LIST_HEAD(&reaplist); |
cdc97505 | 7918 | spin_lock(&state_lock); |
e8c69d17 | 7919 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
1da177e4 | 7920 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
3fcbbd24 | 7921 | WARN_ON(!unhash_delegation_locked(dp)); |
42690676 | 7922 | list_add(&dp->dl_recall_lru, &reaplist); |
1da177e4 | 7923 | } |
cdc97505 | 7924 | spin_unlock(&state_lock); |
1da177e4 LT |
7925 | list_for_each_safe(pos, next, &reaplist) { |
7926 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
42690676 | 7927 | list_del_init(&dp->dl_recall_lru); |
0af6e690 | 7928 | destroy_unhashed_deleg(dp); |
1da177e4 LT |
7929 | } |
7930 | ||
3320fef1 | 7931 | nfsd4_client_tracking_exit(net); |
4dce0ac9 | 7932 | nfs4_state_destroy_net(net); |
1da177e4 LT |
7933 | } |
7934 | ||
7935 | void | |
7936 | nfs4_state_shutdown(void) | |
7937 | { | |
5e8d5c29 | 7938 | destroy_workqueue(laundry_wq); |
c3935e30 | 7939 | nfsd4_destroy_callback_queue(); |
1da177e4 | 7940 | } |
8b70484c TM |
7941 | |
7942 | static void | |
7943 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7944 | { | |
51100d2b OK |
7945 | if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && |
7946 | CURRENT_STATEID(stateid)) | |
37c593c5 | 7947 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
8b70484c TM |
7948 | } |
7949 | ||
7950 | static void | |
7951 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) | |
7952 | { | |
37c593c5 TM |
7953 | if (cstate->minorversion) { |
7954 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); | |
51100d2b | 7955 | SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
37c593c5 TM |
7956 | } |
7957 | } | |
7958 | ||
7959 | void | |
7960 | clear_current_stateid(struct nfsd4_compound_state *cstate) | |
7961 | { | |
51100d2b | 7962 | CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
8b70484c TM |
7963 | } |
7964 | ||
62cd4a59 TM |
7965 | /* |
7966 | * functions to set current state id | |
7967 | */ | |
9428fe1a | 7968 | void |
b60e9859 CH |
7969 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, |
7970 | union nfsd4_op_u *u) | |
9428fe1a | 7971 | { |
b60e9859 | 7972 | put_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
7973 | } |
7974 | ||
8b70484c | 7975 | void |
b60e9859 CH |
7976 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, |
7977 | union nfsd4_op_u *u) | |
8b70484c | 7978 | { |
b60e9859 | 7979 | put_stateid(cstate, &u->open.op_stateid); |
8b70484c TM |
7980 | } |
7981 | ||
62cd4a59 | 7982 | void |
b60e9859 CH |
7983 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, |
7984 | union nfsd4_op_u *u) | |
62cd4a59 | 7985 | { |
b60e9859 | 7986 | put_stateid(cstate, &u->close.cl_stateid); |
62cd4a59 TM |
7987 | } |
7988 | ||
7989 | void | |
b60e9859 CH |
7990 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, |
7991 | union nfsd4_op_u *u) | |
62cd4a59 | 7992 | { |
b60e9859 | 7993 | put_stateid(cstate, &u->lock.lk_resp_stateid); |
62cd4a59 TM |
7994 | } |
7995 | ||
7996 | /* | |
7997 | * functions to consume current state id | |
7998 | */ | |
1e97b519 | 7999 | |
9428fe1a | 8000 | void |
57832e7b CH |
8001 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, |
8002 | union nfsd4_op_u *u) | |
9428fe1a | 8003 | { |
57832e7b | 8004 | get_stateid(cstate, &u->open_downgrade.od_stateid); |
9428fe1a TM |
8005 | } |
8006 | ||
8007 | void | |
57832e7b CH |
8008 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, |
8009 | union nfsd4_op_u *u) | |
9428fe1a | 8010 | { |
57832e7b | 8011 | get_stateid(cstate, &u->delegreturn.dr_stateid); |
9428fe1a TM |
8012 | } |
8013 | ||
1e97b519 | 8014 | void |
57832e7b CH |
8015 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, |
8016 | union nfsd4_op_u *u) | |
1e97b519 | 8017 | { |
57832e7b | 8018 | get_stateid(cstate, &u->free_stateid.fr_stateid); |
1e97b519 TM |
8019 | } |
8020 | ||
8021 | void | |
57832e7b CH |
8022 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, |
8023 | union nfsd4_op_u *u) | |
1e97b519 | 8024 | { |
57832e7b | 8025 | get_stateid(cstate, &u->setattr.sa_stateid); |
1e97b519 TM |
8026 | } |
8027 | ||
8b70484c | 8028 | void |
57832e7b CH |
8029 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, |
8030 | union nfsd4_op_u *u) | |
8b70484c | 8031 | { |
57832e7b | 8032 | get_stateid(cstate, &u->close.cl_stateid); |
8b70484c TM |
8033 | } |
8034 | ||
8035 | void | |
57832e7b CH |
8036 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, |
8037 | union nfsd4_op_u *u) | |
8b70484c | 8038 | { |
57832e7b | 8039 | get_stateid(cstate, &u->locku.lu_stateid); |
8b70484c | 8040 | } |
30813e27 TM |
8041 | |
8042 | void | |
57832e7b CH |
8043 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, |
8044 | union nfsd4_op_u *u) | |
30813e27 | 8045 | { |
57832e7b | 8046 | get_stateid(cstate, &u->read.rd_stateid); |
30813e27 TM |
8047 | } |
8048 | ||
8049 | void | |
57832e7b CH |
8050 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, |
8051 | union nfsd4_op_u *u) | |
30813e27 | 8052 | { |
57832e7b | 8053 | get_stateid(cstate, &u->write.wr_stateid); |
30813e27 | 8054 | } |