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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
24c8dbbb DH |
2 | /* client.c: NFS client sharing and management code |
3 | * | |
4 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
24c8dbbb DH |
6 | */ |
7 | ||
8 | ||
24c8dbbb DH |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
e8edc6e0 | 11 | #include <linux/sched.h> |
24c8dbbb DH |
12 | #include <linux/time.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/unistd.h> | |
d8efa4e6 | 19 | #include <linux/sunrpc/addr.h> |
24c8dbbb DH |
20 | #include <linux/sunrpc/clnt.h> |
21 | #include <linux/sunrpc/stats.h> | |
22 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 23 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 24 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
25 | #include <linux/nfs_fs.h> |
26 | #include <linux/nfs_mount.h> | |
27 | #include <linux/nfs4_mount.h> | |
28 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
29 | #include <linux/seq_file.h> |
30 | #include <linux/mount.h> | |
24c8dbbb DH |
31 | #include <linux/vfs.h> |
32 | #include <linux/inet.h> | |
3b0d3f93 | 33 | #include <linux/in6.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
40401530 | 35 | #include <linux/idr.h> |
3b0d3f93 | 36 | #include <net/ipv6.h> |
24c8dbbb | 37 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 38 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
39 | #include <linux/nsproxy.h> |
40 | #include <linux/pid_namespace.h> | |
24c8dbbb | 41 | |
24c8dbbb DH |
42 | |
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
14727281 | 48 | #include "fscache.h" |
85e174ba | 49 | #include "pnfs.h" |
ab7017a3 | 50 | #include "nfs.h" |
6b13168b | 51 | #include "netns.h" |
bf11fbdb | 52 | #include "sysfs.h" |
24c8dbbb DH |
53 | |
54 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
55 | ||
24c8dbbb | 56 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
57 | static DEFINE_SPINLOCK(nfs_version_lock); |
58 | static DEFINE_MUTEX(nfs_version_mutex); | |
59 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 60 | |
5006a76c DH |
61 | /* |
62 | * RPC cruft for NFS | |
63 | */ | |
a613fa16 | 64 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
65 | [2] = NULL, |
66 | [3] = NULL, | |
67 | [4] = NULL, | |
5006a76c DH |
68 | }; |
69 | ||
a613fa16 | 70 | const struct rpc_program nfs_program = { |
5006a76c DH |
71 | .name = "nfs", |
72 | .number = NFS_PROGRAM, | |
73 | .nrvers = ARRAY_SIZE(nfs_version), | |
74 | .version = nfs_version, | |
75 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 76 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
77 | }; |
78 | ||
79 | struct rpc_stat nfs_rpcstat = { | |
80 | .program = &nfs_program | |
81 | }; | |
82 | ||
ab7017a3 BS |
83 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
84 | { | |
85 | struct nfs_subversion *nfs; | |
86 | spin_lock(&nfs_version_lock); | |
87 | ||
88 | list_for_each_entry(nfs, &nfs_versions, list) { | |
89 | if (nfs->rpc_ops->version == version) { | |
90 | spin_unlock(&nfs_version_lock); | |
91 | return nfs; | |
92 | } | |
ee34e136 | 93 | } |
ab7017a3 BS |
94 | |
95 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 96 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
97 | } |
98 | ||
99 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
100 | { | |
101 | struct nfs_subversion *nfs = find_nfs_version(version); | |
102 | ||
103 | if (IS_ERR(nfs)) { | |
104 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 105 | request_module("nfsv%d", version); |
ab7017a3 BS |
106 | nfs = find_nfs_version(version); |
107 | mutex_unlock(&nfs_version_mutex); | |
108 | } | |
109 | ||
1f70ef96 AK |
110 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
111 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
112 | return nfs; |
113 | } | |
114 | ||
115 | void put_nfs_version(struct nfs_subversion *nfs) | |
116 | { | |
117 | module_put(nfs->owner); | |
118 | } | |
119 | ||
120 | void register_nfs_version(struct nfs_subversion *nfs) | |
121 | { | |
122 | spin_lock(&nfs_version_lock); | |
123 | ||
124 | list_add(&nfs->list, &nfs_versions); | |
125 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
126 | ||
127 | spin_unlock(&nfs_version_lock); | |
128 | } | |
129 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
130 | ||
131 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
132 | { | |
133 | spin_lock(&nfs_version_lock); | |
134 | ||
135 | nfs_version[nfs->rpc_ops->version] = NULL; | |
136 | list_del(&nfs->list); | |
137 | ||
138 | spin_unlock(&nfs_version_lock); | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
141 | ||
24c8dbbb DH |
142 | /* |
143 | * Allocate a shared client record | |
144 | * | |
145 | * Since these are allocated/deallocated very rarely, we don't | |
146 | * bother putting them in a slab cache... | |
147 | */ | |
6663ee7f | 148 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
149 | { |
150 | struct nfs_client *clp; | |
a21bdd9b | 151 | int err = -ENOMEM; |
24c8dbbb DH |
152 | |
153 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
154 | goto error_0; | |
155 | ||
ab7017a3 | 156 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
157 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
158 | goto error_dealloc; | |
ab7017a3 BS |
159 | |
160 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 161 | |
212bf41d | 162 | refcount_set(&clp->cl_count, 1); |
24c8dbbb DH |
163 | clp->cl_cons_state = NFS_CS_INITING; |
164 | ||
6e4cffd7 CL |
165 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
166 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 167 | |
3a498026 | 168 | if (cl_init->hostname) { |
a21bdd9b | 169 | err = -ENOMEM; |
3a498026 | 170 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 171 | if (!clp->cl_hostname) |
71468513 | 172 | goto error_cleanup; |
24c8dbbb DH |
173 | } |
174 | ||
175 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
176 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
177 | ||
59dca3b2 | 178 | clp->cl_proto = cl_init->proto; |
6619079d | 179 | clp->cl_nconnect = cl_init->nconnect; |
73ea666c | 180 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 181 | |
5e16923b | 182 | clp->cl_principal = "*"; |
14727281 DH |
183 | nfs_fscache_get_client_cookie(clp); |
184 | ||
24c8dbbb DH |
185 | return clp; |
186 | ||
71468513 | 187 | error_cleanup: |
ab7017a3 | 188 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 189 | error_dealloc: |
24c8dbbb DH |
190 | kfree(clp); |
191 | error_0: | |
a21bdd9b | 192 | return ERR_PTR(err); |
24c8dbbb | 193 | } |
ddda8e0a | 194 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 195 | |
89d77c8f | 196 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 197 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 198 | { |
28cd1b3f SK |
199 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
200 | ||
201 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
202 | } |
203 | ||
204 | /* nfs_client_lock held */ | |
205 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
206 | { | |
73ea666c | 207 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 208 | |
f4eecd5d | 209 | if (clp->cl_cb_ident) |
28cd1b3f | 210 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
211 | } |
212 | ||
f7e8917a FI |
213 | static void pnfs_init_server(struct nfs_server *server) |
214 | { | |
215 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
216 | } | |
217 | ||
888ef2e3 | 218 | #else |
10b7a70c | 219 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
220 | { |
221 | } | |
222 | ||
223 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
224 | { | |
225 | } | |
f7e8917a FI |
226 | |
227 | static void pnfs_init_server(struct nfs_server *server) | |
228 | { | |
229 | } | |
230 | ||
888ef2e3 | 231 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 232 | |
24c8dbbb DH |
233 | /* |
234 | * Destroy a shared client record | |
235 | */ | |
cdb7eced | 236 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 237 | { |
14727281 DH |
238 | nfs_fscache_release_client_cookie(clp); |
239 | ||
24c8dbbb DH |
240 | /* -EIO all pending I/O */ |
241 | if (!IS_ERR(clp->cl_rpcclient)) | |
242 | rpc_shutdown_client(clp->cl_rpcclient); | |
243 | ||
73ea666c | 244 | put_net(clp->cl_net); |
ab7017a3 | 245 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 246 | kfree(clp->cl_hostname); |
f11b2a1c | 247 | kfree(clp->cl_acceptor); |
24c8dbbb | 248 | kfree(clp); |
24c8dbbb | 249 | } |
ddda8e0a | 250 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
251 | |
252 | /* | |
253 | * Release a reference to a shared client record | |
254 | */ | |
255 | void nfs_put_client(struct nfs_client *clp) | |
256 | { | |
dc030858 SK |
257 | struct nfs_net *nn; |
258 | ||
27ba8512 DH |
259 | if (!clp) |
260 | return; | |
261 | ||
73ea666c | 262 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 263 | |
212bf41d | 264 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 265 | list_del(&clp->cl_share_link); |
f4eecd5d | 266 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 267 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 268 | |
1fea73a8 | 269 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 270 | |
cdb7eced | 271 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
272 | } |
273 | } | |
16b374ca | 274 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 275 | |
24c8dbbb | 276 | /* |
c81468a1 TM |
277 | * Find an nfs_client on the list that matches the initialisation data |
278 | * that is supplied. | |
24c8dbbb | 279 | */ |
c81468a1 | 280 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
281 | { |
282 | struct nfs_client *clp; | |
d7371c41 | 283 | const struct sockaddr *sap = data->addr; |
6b13168b | 284 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 285 | int error; |
24c8dbbb | 286 | |
c156618e | 287 | again: |
6b13168b | 288 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 289 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
290 | /* Don't match clients that failed to initialise properly */ |
291 | if (clp->cl_cons_state < 0) | |
292 | continue; | |
293 | ||
c156618e SM |
294 | /* If a client is still initializing then we need to wait */ |
295 | if (clp->cl_cons_state > NFS_CS_READY) { | |
296 | refcount_inc(&clp->cl_count); | |
297 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 298 | error = nfs_wait_client_init_complete(clp); |
c156618e | 299 | nfs_put_client(clp); |
c260121a | 300 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
301 | if (error < 0) |
302 | return ERR_PTR(error); | |
c156618e SM |
303 | goto again; |
304 | } | |
305 | ||
c81468a1 | 306 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 307 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
308 | continue; |
309 | ||
59dca3b2 TM |
310 | if (clp->cl_proto != data->proto) |
311 | continue; | |
5aae4a9a BH |
312 | /* Match nfsv4 minorversion */ |
313 | if (clp->cl_minorversion != data->minorversion) | |
314 | continue; | |
52f98f1a TM |
315 | |
316 | /* Match request for a dedicated DS */ | |
317 | if (test_bit(NFS_CS_DS, &data->init_flags) != | |
318 | test_bit(NFS_CS_DS, &clp->cl_flags)) | |
319 | continue; | |
320 | ||
c81468a1 | 321 | /* Match the full socket address */ |
d8efa4e6 | 322 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 323 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
324 | if (IS_ERR(clp->cl_rpcclient) || |
325 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
326 | sap)) |
327 | continue; | |
c81468a1 | 328 | |
212bf41d | 329 | refcount_inc(&clp->cl_count); |
c81468a1 | 330 | return clp; |
13bbc06a | 331 | } |
c81468a1 | 332 | return NULL; |
24c8dbbb DH |
333 | } |
334 | ||
a33e4b03 WAA |
335 | /* |
336 | * Return true if @clp is done initializing, false if still working on it. | |
337 | * | |
338 | * Use nfs_client_init_status to check if it was successful. | |
339 | */ | |
340 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 341 | { |
48d66b97 | 342 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 343 | } |
a33e4b03 WAA |
344 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
345 | ||
346 | /* | |
347 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
348 | * | |
349 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
350 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
351 | */ | |
352 | int nfs_client_init_status(const struct nfs_client *clp) | |
353 | { | |
354 | /* called without checking nfs_client_init_is_complete */ | |
355 | if (clp->cl_cons_state > NFS_CS_READY) { | |
356 | WARN_ON_ONCE(1); | |
357 | return -EINVAL; | |
358 | } | |
359 | return clp->cl_cons_state; | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
362 | |
363 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
364 | { | |
365 | return wait_event_killable(nfs_client_active_wq, | |
366 | nfs_client_init_is_complete(clp)); | |
367 | } | |
89d77c8f | 368 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 369 | |
f411703a CL |
370 | /* |
371 | * Found an existing client. Make sure it's ready before returning. | |
372 | */ | |
373 | static struct nfs_client * | |
374 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
375 | struct nfs_client *clp) | |
376 | { | |
377 | int error; | |
378 | ||
4697bd5e | 379 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
380 | if (error < 0) { |
381 | nfs_put_client(clp); | |
382 | return ERR_PTR(-ERESTARTSYS); | |
383 | } | |
384 | ||
385 | if (clp->cl_cons_state < NFS_CS_READY) { | |
386 | error = clp->cl_cons_state; | |
387 | nfs_put_client(clp); | |
388 | return ERR_PTR(error); | |
389 | } | |
390 | ||
54ac471c | 391 | smp_rmb(); |
f411703a CL |
392 | return clp; |
393 | } | |
394 | ||
24c8dbbb DH |
395 | /* |
396 | * Look up a client by IP address and protocol version | |
397 | * - creates a new record if one doesn't yet exist | |
398 | */ | |
7d38de3f | 399 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
400 | { |
401 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 402 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 403 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 404 | |
31434f49 PT |
405 | if (cl_init->hostname == NULL) { |
406 | WARN_ON(1); | |
407 | return NULL; | |
408 | } | |
409 | ||
24c8dbbb DH |
410 | /* see if the client already exists */ |
411 | do { | |
dc030858 | 412 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 413 | |
c81468a1 | 414 | clp = nfs_match_client(cl_init); |
f411703a CL |
415 | if (clp) { |
416 | spin_unlock(&nn->nfs_client_lock); | |
417 | if (new) | |
cdb7eced | 418 | new->rpc_ops->free_client(new); |
9f7761cf BC |
419 | if (IS_ERR(clp)) |
420 | return clp; | |
f411703a CL |
421 | return nfs_found_client(cl_init, clp); |
422 | } | |
8cab4c39 | 423 | if (new) { |
05f4c350 CL |
424 | list_add_tail(&new->cl_share_link, |
425 | &nn->nfs_client_list); | |
8cab4c39 | 426 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 427 | new->cl_flags = cl_init->init_flags; |
5c6e5b60 | 428 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 429 | } |
24c8dbbb | 430 | |
dc030858 | 431 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 432 | |
ab7017a3 | 433 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 434 | } while (!IS_ERR(new)); |
24c8dbbb | 435 | |
a21bdd9b | 436 | return new; |
24c8dbbb | 437 | } |
89d77c8f | 438 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
439 | |
440 | /* | |
441 | * Mark a server as ready or failed | |
442 | */ | |
76db6d95 | 443 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 444 | { |
54ac471c | 445 | smp_wmb(); |
24c8dbbb DH |
446 | clp->cl_cons_state = state; |
447 | wake_up_all(&nfs_client_active_wq); | |
448 | } | |
89d77c8f | 449 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
450 | |
451 | /* | |
452 | * Initialise the timeout values for a connection | |
453 | */ | |
fcf10398 | 454 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 455 | int timeo, int retrans) |
5006a76c DH |
456 | { |
457 | to->to_initval = timeo * HZ / 10; | |
458 | to->to_retries = retrans; | |
5006a76c DH |
459 | |
460 | switch (proto) { | |
0896a725 | 461 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 462 | case XPRT_TRANSPORT_RDMA: |
a956beda | 463 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 464 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 465 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 466 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
467 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
468 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
469 | to->to_increment = to->to_initval; | |
470 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
471 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
472 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
473 | if (to->to_maxval < to->to_initval) | |
474 | to->to_maxval = to->to_initval; | |
5006a76c DH |
475 | to->to_exponential = 0; |
476 | break; | |
0896a725 | 477 | case XPRT_TRANSPORT_UDP: |
a956beda | 478 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 479 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 480 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 481 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
482 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
483 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
484 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
485 | to->to_exponential = 1; | |
486 | break; | |
259875ef TM |
487 | default: |
488 | BUG(); | |
5006a76c DH |
489 | } |
490 | } | |
89d77c8f | 491 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
492 | |
493 | /* | |
494 | * Create an RPC client handle | |
495 | */ | |
428360d7 | 496 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 497 | const struct nfs_client_initdata *cl_init, |
428360d7 | 498 | rpc_authflavor_t flavor) |
5006a76c | 499 | { |
5006a76c | 500 | struct rpc_clnt *clnt = NULL; |
41877d20 | 501 | struct rpc_create_args args = { |
73ea666c | 502 | .net = clp->cl_net, |
59dca3b2 | 503 | .protocol = clp->cl_proto, |
6619079d | 504 | .nconnect = clp->cl_nconnect, |
41877d20 | 505 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 506 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 507 | .timeout = cl_init->timeparms, |
41877d20 | 508 | .servername = clp->cl_hostname, |
5c6e5b60 | 509 | .nodename = cl_init->nodename, |
41877d20 CL |
510 | .program = &nfs_program, |
511 | .version = clp->rpc_ops->version, | |
512 | .authflavor = flavor, | |
1a58e8a0 | 513 | .cred = cl_init->cred, |
41877d20 | 514 | }; |
5006a76c | 515 | |
4bf590e0 | 516 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 517 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
518 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
519 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 520 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 521 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
522 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
523 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4b1b69ce TM |
524 | if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
525 | args.flags |= RPC_CLNT_CREATE_NOPING; | |
e6237b6f TM |
526 | if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
527 | args.flags |= RPC_CLNT_CREATE_REUSEPORT; | |
4a01b8a4 | 528 | |
5006a76c DH |
529 | if (!IS_ERR(clp->cl_rpcclient)) |
530 | return 0; | |
531 | ||
41877d20 | 532 | clnt = rpc_create(&args); |
5006a76c DH |
533 | if (IS_ERR(clnt)) { |
534 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 535 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
536 | return PTR_ERR(clnt); |
537 | } | |
538 | ||
5e16923b | 539 | clnt->cl_principal = clp->cl_principal; |
5006a76c DH |
540 | clp->cl_rpcclient = clnt; |
541 | return 0; | |
542 | } | |
89d77c8f | 543 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
544 | |
545 | /* | |
546 | * Version 2 or 3 client destruction | |
547 | */ | |
548 | static void nfs_destroy_server(struct nfs_server *server) | |
549 | { | |
f259613a | 550 | if (server->nlm_host) |
9289e7f9 | 551 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
552 | } |
553 | ||
554 | /* | |
555 | * Version 2 or 3 lockd setup | |
556 | */ | |
557 | static int nfs_start_lockd(struct nfs_server *server) | |
558 | { | |
9289e7f9 CL |
559 | struct nlm_host *host; |
560 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
561 | struct nlmclnt_initdata nlm_init = { |
562 | .hostname = clp->cl_hostname, | |
563 | .address = (struct sockaddr *)&clp->cl_addr, | |
564 | .addrlen = clp->cl_addrlen, | |
883bb163 | 565 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
566 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
567 | 1 : 0, | |
73ea666c | 568 | .net = clp->cl_net, |
b1ece737 | 569 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
40373b12 | 570 | .cred = current_cred(), |
883bb163 | 571 | }; |
54ceac45 | 572 | |
883bb163 | 573 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 574 | return 0; |
5eebde23 SJ |
575 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
576 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
577 | return 0; |
578 | ||
8a6e5deb TM |
579 | switch (clp->cl_proto) { |
580 | default: | |
581 | nlm_init.protocol = IPPROTO_TCP; | |
582 | break; | |
583 | case XPRT_TRANSPORT_UDP: | |
584 | nlm_init.protocol = IPPROTO_UDP; | |
585 | } | |
586 | ||
883bb163 | 587 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
588 | if (IS_ERR(host)) |
589 | return PTR_ERR(host); | |
590 | ||
591 | server->nlm_host = host; | |
592 | server->destroy = nfs_destroy_server; | |
593 | return 0; | |
54ceac45 DH |
594 | } |
595 | ||
54ceac45 DH |
596 | /* |
597 | * Create a general RPC client | |
598 | */ | |
fcf10398 | 599 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
600 | const struct rpc_timeout *timeo, |
601 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
602 | { |
603 | struct nfs_client *clp = server->nfs_client; | |
604 | ||
ba9b584c CL |
605 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
606 | pseudoflavour); | |
54ceac45 | 607 | if (IS_ERR(server->client)) { |
3110ff80 | 608 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
609 | return PTR_ERR(server->client); |
610 | } | |
611 | ||
33170233 TM |
612 | memcpy(&server->client->cl_timeout_default, |
613 | timeo, | |
614 | sizeof(server->client->cl_timeout_default)); | |
615 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 616 | server->client->cl_softrtry = 0; |
91a575e1 TM |
617 | if (server->flags & NFS_MOUNT_SOFTERR) |
618 | server->client->cl_softerr = 1; | |
54ceac45 DH |
619 | if (server->flags & NFS_MOUNT_SOFT) |
620 | server->client->cl_softrtry = 1; | |
621 | ||
54ceac45 DH |
622 | return 0; |
623 | } | |
89d77c8f | 624 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 625 | |
8cab4c39 CL |
626 | /** |
627 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
628 | * | |
629 | * @clp: nfs_client to initialise | |
5c6e5b60 | 630 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
631 | * |
632 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 633 | */ |
8cab4c39 | 634 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 635 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 636 | { |
54ceac45 DH |
637 | int error; |
638 | ||
2844b6ae AS |
639 | /* the client is already initialised */ |
640 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 641 | return clp; |
54ceac45 | 642 | |
54ceac45 DH |
643 | /* |
644 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
645 | * - RFC 2623, sec 2.3.2 | |
646 | */ | |
5c6e5b60 | 647 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
648 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
649 | if (error < 0) { | |
650 | nfs_put_client(clp); | |
651 | clp = ERR_PTR(error); | |
652 | } | |
8cab4c39 | 653 | return clp; |
54ceac45 | 654 | } |
ddda8e0a | 655 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
656 | |
657 | /* | |
658 | * Create a version 2 or 3 client | |
659 | */ | |
2283f8d6 | 660 | static int nfs_init_server(struct nfs_server *server, |
62a55d08 | 661 | const struct fs_context *fc) |
54ceac45 | 662 | { |
62a55d08 | 663 | const struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5c6e5b60 | 664 | struct rpc_timeout timeparms; |
3a498026 | 665 | struct nfs_client_initdata cl_init = { |
38465f5d SM |
666 | .hostname = ctx->nfs_server.hostname, |
667 | .addr = (const struct sockaddr *)&ctx->nfs_server.address, | |
668 | .addrlen = ctx->nfs_server.addrlen, | |
62a55d08 | 669 | .nfs_mod = ctx->nfs_mod, |
38465f5d | 670 | .proto = ctx->nfs_server.protocol, |
62a55d08 | 671 | .net = fc->net_ns, |
5c6e5b60 | 672 | .timeparms = &timeparms, |
1a58e8a0 | 673 | .cred = server->cred, |
38465f5d | 674 | .nconnect = ctx->nfs_server.nconnect, |
e6237b6f | 675 | .init_flags = (1UL << NFS_CS_REUSEPORT), |
3a498026 | 676 | }; |
54ceac45 | 677 | struct nfs_client *clp; |
3a498026 | 678 | int error; |
54ceac45 | 679 | |
38465f5d SM |
680 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
681 | ctx->timeo, ctx->retrans); | |
682 | if (ctx->flags & NFS_MOUNT_NORESVPORT) | |
4bf590e0 | 683 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
45a52a02 | 684 | |
54ceac45 | 685 | /* Allocate or find a client reference we can use */ |
7d38de3f | 686 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 687 | if (IS_ERR(clp)) |
54ceac45 | 688 | return PTR_ERR(clp); |
54ceac45 | 689 | |
54ceac45 DH |
690 | server->nfs_client = clp; |
691 | ||
692 | /* Initialise the client representation from the mount data */ | |
38465f5d SM |
693 | server->flags = ctx->flags; |
694 | server->options = ctx->options; | |
62ab460c TM |
695 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
696 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
cd812599 | 697 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; |
54ceac45 | 698 | |
38465f5d SM |
699 | if (ctx->rsize) |
700 | server->rsize = nfs_block_size(ctx->rsize, NULL); | |
701 | if (ctx->wsize) | |
702 | server->wsize = nfs_block_size(ctx->wsize, NULL); | |
54ceac45 | 703 | |
38465f5d SM |
704 | server->acregmin = ctx->acregmin * HZ; |
705 | server->acregmax = ctx->acregmax * HZ; | |
706 | server->acdirmin = ctx->acdirmin * HZ; | |
707 | server->acdirmax = ctx->acdirmax * HZ; | |
54ceac45 DH |
708 | |
709 | /* Start lockd here, before we might error out */ | |
710 | error = nfs_start_lockd(server); | |
711 | if (error < 0) | |
712 | goto error; | |
713 | ||
38465f5d SM |
714 | server->port = ctx->nfs_server.port; |
715 | server->auth_info = ctx->auth_info; | |
f22d6d79 | 716 | |
a3f73c27 | 717 | error = nfs_init_server_rpcclient(server, &timeparms, |
38465f5d | 718 | ctx->selected_flavor); |
54ceac45 DH |
719 | if (error < 0) |
720 | goto error; | |
721 | ||
3f8400d1 | 722 | /* Preserve the values of mount_server-related mount options */ |
38465f5d SM |
723 | if (ctx->mount_server.addrlen) { |
724 | memcpy(&server->mountd_address, &ctx->mount_server.address, | |
725 | ctx->mount_server.addrlen); | |
726 | server->mountd_addrlen = ctx->mount_server.addrlen; | |
3f8400d1 | 727 | } |
38465f5d SM |
728 | server->mountd_version = ctx->mount_server.version; |
729 | server->mountd_port = ctx->mount_server.port; | |
730 | server->mountd_protocol = ctx->mount_server.protocol; | |
3f8400d1 | 731 | |
38465f5d | 732 | server->namelen = ctx->namlen; |
54ceac45 DH |
733 | return 0; |
734 | ||
735 | error: | |
736 | server->nfs_client = NULL; | |
737 | nfs_put_client(clp); | |
54ceac45 DH |
738 | return error; |
739 | } | |
740 | ||
741 | /* | |
742 | * Load up the server record from information gained in an fsinfo record | |
743 | */ | |
738fd0f3 | 744 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 745 | struct nfs_fsinfo *fsinfo) |
54ceac45 DH |
746 | { |
747 | unsigned long max_rpc_payload; | |
748 | ||
749 | /* Work out a lot of parameters */ | |
750 | if (server->rsize == 0) | |
751 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
752 | if (server->wsize == 0) | |
753 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
754 | ||
755 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
756 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
757 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
758 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
759 | ||
760 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
761 | if (server->rsize > max_rpc_payload) | |
762 | server->rsize = max_rpc_payload; | |
763 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
764 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 765 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 766 | |
54ceac45 DH |
767 | if (server->wsize > max_rpc_payload) |
768 | server->wsize = max_rpc_payload; | |
769 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
770 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 771 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 772 | |
54ceac45 DH |
773 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
774 | ||
775 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
09cbfeaf KS |
776 | if (server->dtsize > PAGE_SIZE * NFS_MAX_READDIR_PAGES) |
777 | server->dtsize = PAGE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
778 | if (server->dtsize > server->rsize) |
779 | server->dtsize = server->rsize; | |
780 | ||
781 | if (server->flags & NFS_MOUNT_NOAC) { | |
782 | server->acregmin = server->acregmax = 0; | |
783 | server->acdirmin = server->acdirmax = 0; | |
784 | } | |
785 | ||
786 | server->maxfilesize = fsinfo->maxfilesize; | |
787 | ||
6b96724e RL |
788 | server->time_delta = fsinfo->time_delta; |
789 | ||
2a92ee92 | 790 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
791 | /* We're airborne Set socket buffersize */ |
792 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
793 | } | |
794 | ||
795 | /* | |
796 | * Probe filesystem information, including the FSID on v2/v3 | |
797 | */ | |
fcf10398 | 798 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
799 | { |
800 | struct nfs_fsinfo fsinfo; | |
801 | struct nfs_client *clp = server->nfs_client; | |
802 | int error; | |
803 | ||
54ceac45 DH |
804 | if (clp->rpc_ops->set_capabilities != NULL) { |
805 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
806 | if (error < 0) | |
4cbb9768 | 807 | return error; |
54ceac45 DH |
808 | } |
809 | ||
810 | fsinfo.fattr = fattr; | |
ca440c38 | 811 | fsinfo.nlayouttypes = 0; |
3132e49e | 812 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
813 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
814 | if (error < 0) | |
4cbb9768 | 815 | return error; |
54ceac45 | 816 | |
71f81e51 | 817 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
818 | |
819 | /* Get some general file system info */ | |
820 | if (server->namelen == 0) { | |
821 | struct nfs_pathconf pathinfo; | |
822 | ||
823 | pathinfo.fattr = fattr; | |
824 | nfs_fattr_init(fattr); | |
825 | ||
826 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
827 | server->namelen = pathinfo.max_namelen; | |
828 | } | |
829 | ||
54ceac45 | 830 | return 0; |
54ceac45 | 831 | } |
89d77c8f | 832 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
833 | |
834 | /* | |
835 | * Copy useful information when duplicating a server record | |
836 | */ | |
fcf10398 | 837 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
838 | { |
839 | target->flags = source->flags; | |
356e76b8 CL |
840 | target->rsize = source->rsize; |
841 | target->wsize = source->wsize; | |
54ceac45 DH |
842 | target->acregmin = source->acregmin; |
843 | target->acregmax = source->acregmax; | |
844 | target->acdirmin = source->acdirmin; | |
845 | target->acdirmax = source->acdirmax; | |
846 | target->caps = source->caps; | |
2df54806 | 847 | target->options = source->options; |
0f5f49b8 | 848 | target->auth_info = source->auth_info; |
89a6814d | 849 | target->port = source->port; |
54ceac45 | 850 | } |
89d77c8f | 851 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 852 | |
fcf10398 | 853 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
854 | { |
855 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 856 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 857 | |
dc030858 | 858 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 859 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 860 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 861 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 862 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
863 | |
864 | } | |
89d77c8f | 865 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 866 | |
32e62b7c | 867 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 868 | { |
d3b4c9d7 | 869 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 870 | struct nfs_net *nn; |
d3b4c9d7 | 871 | |
4c03ae4a TM |
872 | if (clp == NULL) |
873 | return; | |
73ea666c | 874 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 875 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 876 | list_del_rcu(&server->client_link); |
4c03ae4a | 877 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 878 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 879 | list_del(&server->master_link); |
dc030858 | 880 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
881 | |
882 | synchronize_rcu(); | |
883 | } | |
32e62b7c | 884 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 885 | |
54ceac45 DH |
886 | /* |
887 | * Allocate and initialise a server record | |
888 | */ | |
fcf10398 | 889 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
890 | { |
891 | struct nfs_server *server; | |
892 | ||
893 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
894 | if (!server) | |
895 | return NULL; | |
896 | ||
897 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
898 | ||
899 | /* Zero out the NFS state stuff */ | |
900 | INIT_LIST_HEAD(&server->client_link); | |
901 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 902 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 903 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 904 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 905 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 906 | |
ef818a28 SD |
907 | atomic_set(&server->active, 0); |
908 | ||
54ceac45 DH |
909 | server->io_stats = nfs_alloc_iostats(); |
910 | if (!server->io_stats) { | |
911 | kfree(server); | |
912 | return NULL; | |
913 | } | |
914 | ||
9157c31d | 915 | ida_init(&server->openowner_id); |
d2d7ce28 | 916 | ida_init(&server->lockowner_id); |
f7e8917a | 917 | pnfs_init_server(server); |
68ebf8fe | 918 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 919 | |
54ceac45 DH |
920 | return server; |
921 | } | |
89d77c8f | 922 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
923 | |
924 | /* | |
925 | * Free up a server record | |
926 | */ | |
927 | void nfs_free_server(struct nfs_server *server) | |
928 | { | |
fca5238e | 929 | nfs_server_remove_lists(server); |
54ceac45 DH |
930 | |
931 | if (server->destroy != NULL) | |
932 | server->destroy(server); | |
5cef338b TM |
933 | |
934 | if (!IS_ERR(server->client_acl)) | |
935 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
936 | if (!IS_ERR(server->client)) |
937 | rpc_shutdown_client(server->client); | |
938 | ||
939 | nfs_put_client(server->nfs_client); | |
940 | ||
d2d7ce28 | 941 | ida_destroy(&server->lockowner_id); |
9157c31d | 942 | ida_destroy(&server->openowner_id); |
54ceac45 | 943 | nfs_free_iostats(server->io_stats); |
1a58e8a0 | 944 | put_cred(server->cred); |
54ceac45 DH |
945 | kfree(server); |
946 | nfs_release_automount_timer(); | |
54ceac45 | 947 | } |
89d77c8f | 948 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
949 | |
950 | /* | |
951 | * Create a version 2 or 3 volume record | |
952 | * - keyed on server and FSID | |
953 | */ | |
62a55d08 | 954 | struct nfs_server *nfs_create_server(struct fs_context *fc) |
54ceac45 | 955 | { |
62a55d08 | 956 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
54ceac45 | 957 | struct nfs_server *server; |
fbca779a | 958 | struct nfs_fattr *fattr; |
54ceac45 DH |
959 | int error; |
960 | ||
961 | server = nfs_alloc_server(); | |
962 | if (!server) | |
963 | return ERR_PTR(-ENOMEM); | |
964 | ||
1a58e8a0 TM |
965 | server->cred = get_cred(current_cred()); |
966 | ||
fbca779a TM |
967 | error = -ENOMEM; |
968 | fattr = nfs_alloc_fattr(); | |
969 | if (fattr == NULL) | |
970 | goto error; | |
971 | ||
54ceac45 | 972 | /* Get a client representation */ |
62a55d08 | 973 | error = nfs_init_server(server, fc); |
54ceac45 DH |
974 | if (error < 0) |
975 | goto error; | |
976 | ||
54ceac45 | 977 | /* Probe the root fh to retrieve its FSID */ |
62a55d08 | 978 | error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); |
54ceac45 DH |
979 | if (error < 0) |
980 | goto error; | |
54af3bb5 TM |
981 | if (server->nfs_client->rpc_ops->version == 3) { |
982 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
983 | server->namelen = NFS3_MAXNAMLEN; | |
62a55d08 | 984 | if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
985 | server->caps |= NFS_CAP_READDIRPLUS; |
986 | } else { | |
987 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
988 | server->namelen = NFS2_MAXNAMLEN; | |
989 | } | |
990 | ||
fbca779a | 991 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
62a55d08 SM |
992 | error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, |
993 | fattr, NULL, NULL); | |
54ceac45 DH |
994 | if (error < 0) { |
995 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
996 | goto error; | |
997 | } | |
998 | } | |
fbca779a | 999 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1000 | |
6daabf1b DH |
1001 | dprintk("Server FSID: %llx:%llx\n", |
1002 | (unsigned long long) server->fsid.major, | |
1003 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1004 | |
fca5238e | 1005 | nfs_server_insert_lists(server); |
54ceac45 | 1006 | server->mount_time = jiffies; |
fbca779a | 1007 | nfs_free_fattr(fattr); |
54ceac45 DH |
1008 | return server; |
1009 | ||
1010 | error: | |
fbca779a | 1011 | nfs_free_fattr(fattr); |
54ceac45 DH |
1012 | nfs_free_server(server); |
1013 | return ERR_PTR(error); | |
1014 | } | |
ddda8e0a | 1015 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1016 | |
54ceac45 DH |
1017 | /* |
1018 | * Clone an NFS2, NFS3 or NFS4 server record | |
1019 | */ | |
1020 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1021 | struct nfs_fh *fh, | |
7e6eb683 BS |
1022 | struct nfs_fattr *fattr, |
1023 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1024 | { |
1025 | struct nfs_server *server; | |
fbca779a | 1026 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1027 | int error; |
1028 | ||
54ceac45 DH |
1029 | server = nfs_alloc_server(); |
1030 | if (!server) | |
1031 | return ERR_PTR(-ENOMEM); | |
1032 | ||
1a58e8a0 TM |
1033 | server->cred = get_cred(source->cred); |
1034 | ||
fbca779a TM |
1035 | error = -ENOMEM; |
1036 | fattr_fsinfo = nfs_alloc_fattr(); | |
1037 | if (fattr_fsinfo == NULL) | |
1038 | goto out_free_server; | |
1039 | ||
54ceac45 DH |
1040 | /* Copy data from the source */ |
1041 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1042 | server->destroy = source->destroy; |
212bf41d | 1043 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1044 | nfs_server_copy_userdata(server, source); |
1045 | ||
1046 | server->fsid = fattr->fsid; | |
1047 | ||
33170233 TM |
1048 | error = nfs_init_server_rpcclient(server, |
1049 | source->client->cl_timeout, | |
7e6eb683 | 1050 | flavor); |
54ceac45 DH |
1051 | if (error < 0) |
1052 | goto out_free_server; | |
54ceac45 DH |
1053 | |
1054 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1055 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1056 | if (error < 0) |
1057 | goto out_free_server; | |
1058 | ||
54af3bb5 TM |
1059 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1060 | server->namelen = NFS4_MAXNAMLEN; | |
1061 | ||
54ceac45 DH |
1062 | error = nfs_start_lockd(server); |
1063 | if (error < 0) | |
1064 | goto out_free_server; | |
1065 | ||
fca5238e | 1066 | nfs_server_insert_lists(server); |
54ceac45 DH |
1067 | server->mount_time = jiffies; |
1068 | ||
fbca779a | 1069 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1070 | return server; |
1071 | ||
1072 | out_free_server: | |
fbca779a | 1073 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 | 1074 | nfs_free_server(server); |
54ceac45 DH |
1075 | return ERR_PTR(error); |
1076 | } | |
ddda8e0a | 1077 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1078 | |
6b13168b SK |
1079 | void nfs_clients_init(struct net *net) |
1080 | { | |
1081 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1082 | ||
1083 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1084 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1085 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1086 | idr_init(&nn->cb_ident_idr); |
1087 | #endif | |
4c03ae4a | 1088 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1089 | nn->boot_time = ktime_get_real(); |
bf11fbdb TM |
1090 | |
1091 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1092 | } |
1093 | ||
10b7a70c TM |
1094 | void nfs_clients_exit(struct net *net) |
1095 | { | |
1096 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1097 | ||
bf11fbdb | 1098 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1099 | nfs_cleanup_cb_ident_idr(net); |
1100 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1101 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1102 | } | |
1103 | ||
6aaca566 | 1104 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1105 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1106 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1107 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1108 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1109 | ||
88e9d34c | 1110 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1111 | .start = nfs_server_list_start, |
1112 | .next = nfs_server_list_next, | |
1113 | .stop = nfs_server_list_stop, | |
1114 | .show = nfs_server_list_show, | |
1115 | }; | |
1116 | ||
6aaca566 DH |
1117 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1118 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1119 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1120 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1121 | ||
88e9d34c | 1122 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1123 | .start = nfs_volume_list_start, |
1124 | .next = nfs_volume_list_next, | |
1125 | .stop = nfs_volume_list_stop, | |
1126 | .show = nfs_volume_list_show, | |
1127 | }; | |
1128 | ||
6aaca566 DH |
1129 | /* |
1130 | * set up the iterator to start reading from the server list and return the first item | |
1131 | */ | |
1132 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1133 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1134 | { |
65b38851 | 1135 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1136 | |
6aaca566 | 1137 | /* lock the list against modification */ |
dc030858 | 1138 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1139 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1140 | } |
1141 | ||
1142 | /* | |
1143 | * move to next server | |
1144 | */ | |
1145 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1146 | { | |
65b38851 | 1147 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1148 | |
1149 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1150 | } |
1151 | ||
1152 | /* | |
1153 | * clean up after reading from the transports list | |
1154 | */ | |
1155 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1156 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1157 | { |
65b38851 | 1158 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1159 | |
1160 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1161 | } |
1162 | ||
1163 | /* | |
1164 | * display a header line followed by a load of call lines | |
1165 | */ | |
1166 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1167 | { | |
1168 | struct nfs_client *clp; | |
65b38851 | 1169 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1170 | |
1171 | /* display header on line 1 */ | |
6b13168b | 1172 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1173 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | /* display one transport per line on subsequent lines */ | |
1178 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1179 | ||
940aab49 MN |
1180 | /* Check if the client is initialized */ |
1181 | if (clp->cl_cons_state != NFS_CS_READY) | |
1182 | return 0; | |
1183 | ||
2446ab60 | 1184 | rcu_read_lock(); |
5d8515ca | 1185 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1186 | clp->rpc_ops->version, |
5d8515ca CL |
1187 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1188 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1189 | refcount_read(&clp->cl_count), |
6aaca566 | 1190 | clp->cl_hostname); |
2446ab60 | 1191 | rcu_read_unlock(); |
6aaca566 DH |
1192 | |
1193 | return 0; | |
1194 | } | |
1195 | ||
6aaca566 DH |
1196 | /* |
1197 | * set up the iterator to start reading from the volume list and return the first item | |
1198 | */ | |
1199 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1200 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1201 | { |
65b38851 | 1202 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1203 | |
6aaca566 | 1204 | /* lock the list against modification */ |
dc030858 | 1205 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1206 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1207 | } |
1208 | ||
1209 | /* | |
1210 | * move to next volume | |
1211 | */ | |
1212 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1213 | { | |
65b38851 | 1214 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1215 | |
1216 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1217 | } |
1218 | ||
1219 | /* | |
1220 | * clean up after reading from the transports list | |
1221 | */ | |
1222 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1223 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1224 | { |
65b38851 | 1225 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1226 | |
1227 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1228 | } |
1229 | ||
1230 | /* | |
1231 | * display a header line followed by a load of call lines | |
1232 | */ | |
1233 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1234 | { | |
1235 | struct nfs_server *server; | |
1236 | struct nfs_client *clp; | |
df05a49f KM |
1237 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1238 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1239 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1240 | |
1241 | /* display header on line 1 */ | |
c25d32b2 | 1242 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1243 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1244 | " FSC\n"); | |
6aaca566 DH |
1245 | return 0; |
1246 | } | |
1247 | /* display one transport per line on subsequent lines */ | |
1248 | server = list_entry(v, struct nfs_server, master_link); | |
1249 | clp = server->nfs_client; | |
1250 | ||
df05a49f | 1251 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1252 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1253 | ||
df05a49f | 1254 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1255 | (unsigned long long) server->fsid.major, |
1256 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1257 | |
2446ab60 | 1258 | rcu_read_lock(); |
df05a49f | 1259 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1260 | clp->rpc_ops->version, |
5d8515ca CL |
1261 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1262 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1263 | dev, |
5d1acff1 DH |
1264 | fsid, |
1265 | nfs_server_fscache_state(server)); | |
2446ab60 | 1266 | rcu_read_unlock(); |
6aaca566 DH |
1267 | |
1268 | return 0; | |
1269 | } | |
1270 | ||
65b38851 EB |
1271 | int nfs_fs_proc_net_init(struct net *net) |
1272 | { | |
1273 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1274 | struct proc_dir_entry *p; | |
1275 | ||
1276 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1277 | if (!nn->proc_nfsfs) | |
1278 | goto error_0; | |
1279 | ||
1280 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1281 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1282 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1283 | if (!p) |
1284 | goto error_1; | |
1285 | ||
1286 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1287 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1288 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1289 | if (!p) |
21e81002 | 1290 | goto error_1; |
65b38851 EB |
1291 | return 0; |
1292 | ||
65b38851 | 1293 | error_1: |
21e81002 | 1294 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1295 | error_0: |
1296 | return -ENOMEM; | |
1297 | } | |
1298 | ||
1299 | void nfs_fs_proc_net_exit(struct net *net) | |
1300 | { | |
21e81002 | 1301 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1302 | } |
1303 | ||
6aaca566 DH |
1304 | /* |
1305 | * initialise the /proc/fs/nfsfs/ directory | |
1306 | */ | |
1307 | int __init nfs_fs_proc_init(void) | |
1308 | { | |
6a062a36 | 1309 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1310 | goto error_0; |
1311 | ||
6aaca566 | 1312 | /* a file of servers with which we're dealing */ |
6a062a36 | 1313 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1314 | goto error_1; |
1315 | ||
6aaca566 | 1316 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1317 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1318 | goto error_1; | |
6aaca566 | 1319 | |
6a062a36 | 1320 | return 0; |
6aaca566 | 1321 | error_1: |
6a062a36 | 1322 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1323 | error_0: |
1324 | return -ENOMEM; | |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | * clean up the /proc/fs/nfsfs/ directory | |
1329 | */ | |
1330 | void nfs_fs_proc_exit(void) | |
1331 | { | |
6a062a36 | 1332 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1333 | } |
1334 | ||
1335 | #endif /* CONFIG_PROC_FS */ |