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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" |
04a5da69 | 53 | #include "nfs42.h" |
24c8dbbb DH |
54 | |
55 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
56 | ||
24c8dbbb | 57 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
58 | static DEFINE_SPINLOCK(nfs_version_lock); |
59 | static DEFINE_MUTEX(nfs_version_mutex); | |
60 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 61 | |
5006a76c DH |
62 | /* |
63 | * RPC cruft for NFS | |
64 | */ | |
a613fa16 | 65 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
66 | [2] = NULL, |
67 | [3] = NULL, | |
68 | [4] = NULL, | |
5006a76c DH |
69 | }; |
70 | ||
a613fa16 | 71 | const struct rpc_program nfs_program = { |
5006a76c DH |
72 | .name = "nfs", |
73 | .number = NFS_PROGRAM, | |
74 | .nrvers = ARRAY_SIZE(nfs_version), | |
75 | .version = nfs_version, | |
76 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 77 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
78 | }; |
79 | ||
80 | struct rpc_stat nfs_rpcstat = { | |
81 | .program = &nfs_program | |
82 | }; | |
83 | ||
ab7017a3 BS |
84 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
85 | { | |
86 | struct nfs_subversion *nfs; | |
87 | spin_lock(&nfs_version_lock); | |
88 | ||
89 | list_for_each_entry(nfs, &nfs_versions, list) { | |
90 | if (nfs->rpc_ops->version == version) { | |
91 | spin_unlock(&nfs_version_lock); | |
92 | return nfs; | |
93 | } | |
ee34e136 | 94 | } |
ab7017a3 BS |
95 | |
96 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 97 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
98 | } |
99 | ||
100 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
101 | { | |
102 | struct nfs_subversion *nfs = find_nfs_version(version); | |
103 | ||
104 | if (IS_ERR(nfs)) { | |
105 | mutex_lock(&nfs_version_mutex); | |
1ae811ee | 106 | request_module("nfsv%d", version); |
ab7017a3 BS |
107 | nfs = find_nfs_version(version); |
108 | mutex_unlock(&nfs_version_mutex); | |
109 | } | |
110 | ||
1f70ef96 AK |
111 | if (!IS_ERR(nfs) && !try_module_get(nfs->owner)) |
112 | return ERR_PTR(-EAGAIN); | |
ab7017a3 BS |
113 | return nfs; |
114 | } | |
115 | ||
116 | void put_nfs_version(struct nfs_subversion *nfs) | |
117 | { | |
118 | module_put(nfs->owner); | |
119 | } | |
120 | ||
121 | void register_nfs_version(struct nfs_subversion *nfs) | |
122 | { | |
123 | spin_lock(&nfs_version_lock); | |
124 | ||
125 | list_add(&nfs->list, &nfs_versions); | |
126 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
127 | ||
128 | spin_unlock(&nfs_version_lock); | |
129 | } | |
130 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
131 | ||
132 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
133 | { | |
134 | spin_lock(&nfs_version_lock); | |
135 | ||
136 | nfs_version[nfs->rpc_ops->version] = NULL; | |
137 | list_del(&nfs->list); | |
138 | ||
139 | spin_unlock(&nfs_version_lock); | |
140 | } | |
141 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
142 | ||
24c8dbbb DH |
143 | /* |
144 | * Allocate a shared client record | |
145 | * | |
146 | * Since these are allocated/deallocated very rarely, we don't | |
147 | * bother putting them in a slab cache... | |
148 | */ | |
6663ee7f | 149 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
150 | { |
151 | struct nfs_client *clp; | |
a21bdd9b | 152 | int err = -ENOMEM; |
24c8dbbb DH |
153 | |
154 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
155 | goto error_0; | |
156 | ||
55dee1bc | 157 | clp->cl_minorversion = cl_init->minorversion; |
ab7017a3 | 158 | clp->cl_nfs_mod = cl_init->nfs_mod; |
1f70ef96 AK |
159 | if (!try_module_get(clp->cl_nfs_mod->owner)) |
160 | goto error_dealloc; | |
ab7017a3 BS |
161 | |
162 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 163 | |
212bf41d | 164 | refcount_set(&clp->cl_count, 1); |
24c8dbbb DH |
165 | clp->cl_cons_state = NFS_CS_INITING; |
166 | ||
6e4cffd7 CL |
167 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
168 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 169 | |
3a498026 | 170 | if (cl_init->hostname) { |
a21bdd9b | 171 | err = -ENOMEM; |
3a498026 | 172 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 173 | if (!clp->cl_hostname) |
71468513 | 174 | goto error_cleanup; |
24c8dbbb DH |
175 | } |
176 | ||
177 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
178 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
179 | ||
59dca3b2 | 180 | clp->cl_proto = cl_init->proto; |
6619079d | 181 | clp->cl_nconnect = cl_init->nconnect; |
7e134205 | 182 | clp->cl_max_connect = cl_init->max_connect ? cl_init->max_connect : 1; |
73ea666c | 183 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 184 | |
5e16923b | 185 | clp->cl_principal = "*"; |
14727281 DH |
186 | nfs_fscache_get_client_cookie(clp); |
187 | ||
24c8dbbb DH |
188 | return clp; |
189 | ||
71468513 | 190 | error_cleanup: |
ab7017a3 | 191 | put_nfs_version(clp->cl_nfs_mod); |
1f70ef96 | 192 | error_dealloc: |
24c8dbbb DH |
193 | kfree(clp); |
194 | error_0: | |
a21bdd9b | 195 | return ERR_PTR(err); |
24c8dbbb | 196 | } |
ddda8e0a | 197 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 198 | |
89d77c8f | 199 | #if IS_ENABLED(CONFIG_NFS_V4) |
10b7a70c | 200 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 201 | { |
28cd1b3f SK |
202 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
203 | ||
204 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
205 | } |
206 | ||
207 | /* nfs_client_lock held */ | |
208 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
209 | { | |
73ea666c | 210 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 211 | |
f4eecd5d | 212 | if (clp->cl_cb_ident) |
28cd1b3f | 213 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
214 | } |
215 | ||
f7e8917a FI |
216 | static void pnfs_init_server(struct nfs_server *server) |
217 | { | |
218 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
219 | } | |
220 | ||
888ef2e3 | 221 | #else |
10b7a70c | 222 | static void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
223 | { |
224 | } | |
225 | ||
226 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
227 | { | |
228 | } | |
f7e8917a FI |
229 | |
230 | static void pnfs_init_server(struct nfs_server *server) | |
231 | { | |
232 | } | |
233 | ||
888ef2e3 | 234 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 235 | |
24c8dbbb DH |
236 | /* |
237 | * Destroy a shared client record | |
238 | */ | |
cdb7eced | 239 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 240 | { |
14727281 DH |
241 | nfs_fscache_release_client_cookie(clp); |
242 | ||
24c8dbbb DH |
243 | /* -EIO all pending I/O */ |
244 | if (!IS_ERR(clp->cl_rpcclient)) | |
245 | rpc_shutdown_client(clp->cl_rpcclient); | |
246 | ||
73ea666c | 247 | put_net(clp->cl_net); |
ab7017a3 | 248 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb | 249 | kfree(clp->cl_hostname); |
f11b2a1c | 250 | kfree(clp->cl_acceptor); |
24c8dbbb | 251 | kfree(clp); |
24c8dbbb | 252 | } |
ddda8e0a | 253 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
254 | |
255 | /* | |
256 | * Release a reference to a shared client record | |
257 | */ | |
258 | void nfs_put_client(struct nfs_client *clp) | |
259 | { | |
dc030858 SK |
260 | struct nfs_net *nn; |
261 | ||
27ba8512 DH |
262 | if (!clp) |
263 | return; | |
264 | ||
73ea666c | 265 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 266 | |
212bf41d | 267 | if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 268 | list_del(&clp->cl_share_link); |
f4eecd5d | 269 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 270 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 271 | |
1fea73a8 | 272 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 273 | |
cdb7eced | 274 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
275 | } |
276 | } | |
16b374ca | 277 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 278 | |
24c8dbbb | 279 | /* |
c81468a1 TM |
280 | * Find an nfs_client on the list that matches the initialisation data |
281 | * that is supplied. | |
24c8dbbb | 282 | */ |
c81468a1 | 283 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
284 | { |
285 | struct nfs_client *clp; | |
d7371c41 | 286 | const struct sockaddr *sap = data->addr; |
6b13168b | 287 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
950a578c | 288 | int error; |
24c8dbbb | 289 | |
c156618e | 290 | again: |
6b13168b | 291 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 292 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
293 | /* Don't match clients that failed to initialise properly */ |
294 | if (clp->cl_cons_state < 0) | |
295 | continue; | |
296 | ||
c156618e SM |
297 | /* If a client is still initializing then we need to wait */ |
298 | if (clp->cl_cons_state > NFS_CS_READY) { | |
299 | refcount_inc(&clp->cl_count); | |
300 | spin_unlock(&nn->nfs_client_lock); | |
950a578c | 301 | error = nfs_wait_client_init_complete(clp); |
c156618e | 302 | nfs_put_client(clp); |
c260121a | 303 | spin_lock(&nn->nfs_client_lock); |
950a578c RBC |
304 | if (error < 0) |
305 | return ERR_PTR(error); | |
c156618e SM |
306 | goto again; |
307 | } | |
308 | ||
c81468a1 | 309 | /* Different NFS versions cannot share the same nfs_client */ |
ab7017a3 | 310 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
311 | continue; |
312 | ||
59dca3b2 TM |
313 | if (clp->cl_proto != data->proto) |
314 | continue; | |
5aae4a9a BH |
315 | /* Match nfsv4 minorversion */ |
316 | if (clp->cl_minorversion != data->minorversion) | |
317 | continue; | |
52f98f1a TM |
318 | |
319 | /* Match request for a dedicated DS */ | |
320 | if (test_bit(NFS_CS_DS, &data->init_flags) != | |
321 | test_bit(NFS_CS_DS, &clp->cl_flags)) | |
322 | continue; | |
323 | ||
c81468a1 | 324 | /* Match the full socket address */ |
d8efa4e6 | 325 | if (!rpc_cmp_addr_port(sap, clap)) |
04ea1b3e | 326 | /* Match all xprt_switch full socket addresses */ |
8ef32955 PV |
327 | if (IS_ERR(clp->cl_rpcclient) || |
328 | !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient, | |
04ea1b3e AA |
329 | sap)) |
330 | continue; | |
c81468a1 | 331 | |
212bf41d | 332 | refcount_inc(&clp->cl_count); |
c81468a1 | 333 | return clp; |
13bbc06a | 334 | } |
c81468a1 | 335 | return NULL; |
24c8dbbb DH |
336 | } |
337 | ||
a33e4b03 WAA |
338 | /* |
339 | * Return true if @clp is done initializing, false if still working on it. | |
340 | * | |
341 | * Use nfs_client_init_status to check if it was successful. | |
342 | */ | |
343 | bool nfs_client_init_is_complete(const struct nfs_client *clp) | |
4697bd5e | 344 | { |
48d66b97 | 345 | return clp->cl_cons_state <= NFS_CS_READY; |
4697bd5e | 346 | } |
a33e4b03 WAA |
347 | EXPORT_SYMBOL_GPL(nfs_client_init_is_complete); |
348 | ||
349 | /* | |
350 | * Return 0 if @clp was successfully initialized, -errno otherwise. | |
351 | * | |
352 | * This must be called *after* nfs_client_init_is_complete() returns true, | |
353 | * otherwise it will pop WARN_ON_ONCE and return -EINVAL | |
354 | */ | |
355 | int nfs_client_init_status(const struct nfs_client *clp) | |
356 | { | |
357 | /* called without checking nfs_client_init_is_complete */ | |
358 | if (clp->cl_cons_state > NFS_CS_READY) { | |
359 | WARN_ON_ONCE(1); | |
360 | return -EINVAL; | |
361 | } | |
362 | return clp->cl_cons_state; | |
363 | } | |
364 | EXPORT_SYMBOL_GPL(nfs_client_init_status); | |
4697bd5e TM |
365 | |
366 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
367 | { | |
368 | return wait_event_killable(nfs_client_active_wq, | |
369 | nfs_client_init_is_complete(clp)); | |
370 | } | |
89d77c8f | 371 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 372 | |
f411703a CL |
373 | /* |
374 | * Found an existing client. Make sure it's ready before returning. | |
375 | */ | |
376 | static struct nfs_client * | |
377 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
378 | struct nfs_client *clp) | |
379 | { | |
380 | int error; | |
381 | ||
4697bd5e | 382 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
383 | if (error < 0) { |
384 | nfs_put_client(clp); | |
385 | return ERR_PTR(-ERESTARTSYS); | |
386 | } | |
387 | ||
388 | if (clp->cl_cons_state < NFS_CS_READY) { | |
389 | error = clp->cl_cons_state; | |
390 | nfs_put_client(clp); | |
391 | return ERR_PTR(error); | |
392 | } | |
393 | ||
54ac471c | 394 | smp_rmb(); |
f411703a CL |
395 | return clp; |
396 | } | |
397 | ||
24c8dbbb DH |
398 | /* |
399 | * Look up a client by IP address and protocol version | |
400 | * - creates a new record if one doesn't yet exist | |
401 | */ | |
7d38de3f | 402 | struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
403 | { |
404 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 405 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 406 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 407 | |
31434f49 PT |
408 | if (cl_init->hostname == NULL) { |
409 | WARN_ON(1); | |
09226e83 | 410 | return ERR_PTR(-EINVAL); |
31434f49 PT |
411 | } |
412 | ||
24c8dbbb DH |
413 | /* see if the client already exists */ |
414 | do { | |
dc030858 | 415 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 416 | |
c81468a1 | 417 | clp = nfs_match_client(cl_init); |
f411703a CL |
418 | if (clp) { |
419 | spin_unlock(&nn->nfs_client_lock); | |
420 | if (new) | |
cdb7eced | 421 | new->rpc_ops->free_client(new); |
9f7761cf BC |
422 | if (IS_ERR(clp)) |
423 | return clp; | |
f411703a CL |
424 | return nfs_found_client(cl_init, clp); |
425 | } | |
8cab4c39 | 426 | if (new) { |
05f4c350 CL |
427 | list_add_tail(&new->cl_share_link, |
428 | &nn->nfs_client_list); | |
8cab4c39 | 429 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 430 | new->cl_flags = cl_init->init_flags; |
5c6e5b60 | 431 | return rpc_ops->init_client(new, cl_init); |
8cab4c39 | 432 | } |
24c8dbbb | 433 | |
dc030858 | 434 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 435 | |
ab7017a3 | 436 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 437 | } while (!IS_ERR(new)); |
24c8dbbb | 438 | |
a21bdd9b | 439 | return new; |
24c8dbbb | 440 | } |
89d77c8f | 441 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
442 | |
443 | /* | |
444 | * Mark a server as ready or failed | |
445 | */ | |
76db6d95 | 446 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 447 | { |
54ac471c | 448 | smp_wmb(); |
24c8dbbb DH |
449 | clp->cl_cons_state = state; |
450 | wake_up_all(&nfs_client_active_wq); | |
451 | } | |
89d77c8f | 452 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
453 | |
454 | /* | |
455 | * Initialise the timeout values for a connection | |
456 | */ | |
fcf10398 | 457 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
a956beda | 458 | int timeo, int retrans) |
5006a76c DH |
459 | { |
460 | to->to_initval = timeo * HZ / 10; | |
461 | to->to_retries = retrans; | |
5006a76c DH |
462 | |
463 | switch (proto) { | |
0896a725 | 464 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 465 | case XPRT_TRANSPORT_RDMA: |
a956beda | 466 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 467 | to->to_retries = NFS_DEF_TCP_RETRANS; |
5a698243 | 468 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 469 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
470 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
471 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
472 | to->to_increment = to->to_initval; | |
473 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
474 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
475 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
476 | if (to->to_maxval < to->to_initval) | |
477 | to->to_maxval = to->to_initval; | |
5006a76c DH |
478 | to->to_exponential = 0; |
479 | break; | |
0896a725 | 480 | case XPRT_TRANSPORT_UDP: |
a956beda | 481 | if (retrans == NFS_UNSPEC_RETRANS) |
259875ef | 482 | to->to_retries = NFS_DEF_UDP_RETRANS; |
a956beda | 483 | if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
259875ef | 484 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
485 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
486 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
487 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
488 | to->to_exponential = 1; | |
489 | break; | |
259875ef TM |
490 | default: |
491 | BUG(); | |
5006a76c DH |
492 | } |
493 | } | |
89d77c8f | 494 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
495 | |
496 | /* | |
497 | * Create an RPC client handle | |
498 | */ | |
428360d7 | 499 | int nfs_create_rpc_client(struct nfs_client *clp, |
5c6e5b60 | 500 | const struct nfs_client_initdata *cl_init, |
428360d7 | 501 | rpc_authflavor_t flavor) |
5006a76c | 502 | { |
5006a76c | 503 | struct rpc_clnt *clnt = NULL; |
41877d20 | 504 | struct rpc_create_args args = { |
73ea666c | 505 | .net = clp->cl_net, |
59dca3b2 | 506 | .protocol = clp->cl_proto, |
6619079d | 507 | .nconnect = clp->cl_nconnect, |
41877d20 | 508 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 509 | .addrsize = clp->cl_addrlen, |
5c6e5b60 | 510 | .timeout = cl_init->timeparms, |
41877d20 | 511 | .servername = clp->cl_hostname, |
5c6e5b60 | 512 | .nodename = cl_init->nodename, |
41877d20 CL |
513 | .program = &nfs_program, |
514 | .version = clp->rpc_ops->version, | |
515 | .authflavor = flavor, | |
1a58e8a0 | 516 | .cred = cl_init->cred, |
41877d20 | 517 | }; |
5006a76c | 518 | |
4bf590e0 | 519 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 520 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
99875249 TM |
521 | if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
522 | args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; | |
4bf590e0 | 523 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 | 524 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
98f98cf5 TM |
525 | if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
526 | args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; | |
4b1b69ce TM |
527 | if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
528 | args.flags |= RPC_CLNT_CREATE_NOPING; | |
e6237b6f TM |
529 | if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
530 | args.flags |= RPC_CLNT_CREATE_REUSEPORT; | |
4a01b8a4 | 531 | |
5006a76c DH |
532 | if (!IS_ERR(clp->cl_rpcclient)) |
533 | return 0; | |
534 | ||
41877d20 | 535 | clnt = rpc_create(&args); |
5006a76c DH |
536 | if (IS_ERR(clnt)) { |
537 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 538 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
539 | return PTR_ERR(clnt); |
540 | } | |
541 | ||
5e16923b | 542 | clnt->cl_principal = clp->cl_principal; |
5006a76c | 543 | clp->cl_rpcclient = clnt; |
dc48e0ab | 544 | clnt->cl_max_connect = clp->cl_max_connect; |
5006a76c DH |
545 | return 0; |
546 | } | |
89d77c8f | 547 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
548 | |
549 | /* | |
550 | * Version 2 or 3 client destruction | |
551 | */ | |
552 | static void nfs_destroy_server(struct nfs_server *server) | |
553 | { | |
f259613a | 554 | if (server->nlm_host) |
9289e7f9 | 555 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
556 | } |
557 | ||
558 | /* | |
559 | * Version 2 or 3 lockd setup | |
560 | */ | |
561 | static int nfs_start_lockd(struct nfs_server *server) | |
562 | { | |
9289e7f9 CL |
563 | struct nlm_host *host; |
564 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
565 | struct nlmclnt_initdata nlm_init = { |
566 | .hostname = clp->cl_hostname, | |
567 | .address = (struct sockaddr *)&clp->cl_addr, | |
568 | .addrlen = clp->cl_addrlen, | |
883bb163 | 569 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
570 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
571 | 1 : 0, | |
73ea666c | 572 | .net = clp->cl_net, |
b1ece737 | 573 | .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops, |
d18a9d3f | 574 | .cred = server->cred, |
883bb163 | 575 | }; |
54ceac45 | 576 | |
883bb163 | 577 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 578 | return 0; |
5eebde23 SJ |
579 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
580 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
581 | return 0; |
582 | ||
8a6e5deb TM |
583 | switch (clp->cl_proto) { |
584 | default: | |
585 | nlm_init.protocol = IPPROTO_TCP; | |
586 | break; | |
b24ee6c6 | 587 | #ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT |
8a6e5deb TM |
588 | case XPRT_TRANSPORT_UDP: |
589 | nlm_init.protocol = IPPROTO_UDP; | |
b24ee6c6 | 590 | #endif |
8a6e5deb TM |
591 | } |
592 | ||
883bb163 | 593 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
594 | if (IS_ERR(host)) |
595 | return PTR_ERR(host); | |
596 | ||
597 | server->nlm_host = host; | |
598 | server->destroy = nfs_destroy_server; | |
599 | return 0; | |
54ceac45 DH |
600 | } |
601 | ||
54ceac45 DH |
602 | /* |
603 | * Create a general RPC client | |
604 | */ | |
fcf10398 | 605 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
606 | const struct rpc_timeout *timeo, |
607 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
608 | { |
609 | struct nfs_client *clp = server->nfs_client; | |
610 | ||
ba9b584c CL |
611 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
612 | pseudoflavour); | |
54ceac45 | 613 | if (IS_ERR(server->client)) { |
3110ff80 | 614 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
615 | return PTR_ERR(server->client); |
616 | } | |
617 | ||
33170233 TM |
618 | memcpy(&server->client->cl_timeout_default, |
619 | timeo, | |
620 | sizeof(server->client->cl_timeout_default)); | |
621 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 | 622 | server->client->cl_softrtry = 0; |
91a575e1 TM |
623 | if (server->flags & NFS_MOUNT_SOFTERR) |
624 | server->client->cl_softerr = 1; | |
54ceac45 DH |
625 | if (server->flags & NFS_MOUNT_SOFT) |
626 | server->client->cl_softrtry = 1; | |
627 | ||
54ceac45 DH |
628 | return 0; |
629 | } | |
89d77c8f | 630 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 631 | |
8cab4c39 CL |
632 | /** |
633 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
634 | * | |
635 | * @clp: nfs_client to initialise | |
5c6e5b60 | 636 | * @cl_init: Initialisation parameters |
8cab4c39 CL |
637 | * |
638 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 639 | */ |
8cab4c39 | 640 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
5c6e5b60 | 641 | const struct nfs_client_initdata *cl_init) |
54ceac45 | 642 | { |
54ceac45 DH |
643 | int error; |
644 | ||
2844b6ae AS |
645 | /* the client is already initialised */ |
646 | if (clp->cl_cons_state == NFS_CS_READY) | |
8cab4c39 | 647 | return clp; |
54ceac45 | 648 | |
54ceac45 DH |
649 | /* |
650 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
651 | * - RFC 2623, sec 2.3.2 | |
652 | */ | |
5c6e5b60 | 653 | error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
2844b6ae AS |
654 | nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error); |
655 | if (error < 0) { | |
656 | nfs_put_client(clp); | |
657 | clp = ERR_PTR(error); | |
658 | } | |
8cab4c39 | 659 | return clp; |
54ceac45 | 660 | } |
ddda8e0a | 661 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
662 | |
663 | /* | |
664 | * Create a version 2 or 3 client | |
665 | */ | |
2283f8d6 | 666 | static int nfs_init_server(struct nfs_server *server, |
62a55d08 | 667 | const struct fs_context *fc) |
54ceac45 | 668 | { |
62a55d08 | 669 | const struct nfs_fs_context *ctx = nfs_fc2context(fc); |
5c6e5b60 | 670 | struct rpc_timeout timeparms; |
3a498026 | 671 | struct nfs_client_initdata cl_init = { |
38465f5d SM |
672 | .hostname = ctx->nfs_server.hostname, |
673 | .addr = (const struct sockaddr *)&ctx->nfs_server.address, | |
674 | .addrlen = ctx->nfs_server.addrlen, | |
62a55d08 | 675 | .nfs_mod = ctx->nfs_mod, |
38465f5d | 676 | .proto = ctx->nfs_server.protocol, |
62a55d08 | 677 | .net = fc->net_ns, |
5c6e5b60 | 678 | .timeparms = &timeparms, |
1a58e8a0 | 679 | .cred = server->cred, |
38465f5d | 680 | .nconnect = ctx->nfs_server.nconnect, |
e6237b6f | 681 | .init_flags = (1UL << NFS_CS_REUSEPORT), |
3a498026 | 682 | }; |
54ceac45 | 683 | struct nfs_client *clp; |
3a498026 | 684 | int error; |
54ceac45 | 685 | |
38465f5d SM |
686 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
687 | ctx->timeo, ctx->retrans); | |
688 | if (ctx->flags & NFS_MOUNT_NORESVPORT) | |
4bf590e0 | 689 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
45a52a02 | 690 | |
54ceac45 | 691 | /* Allocate or find a client reference we can use */ |
7d38de3f | 692 | clp = nfs_get_client(&cl_init); |
4cbb9768 | 693 | if (IS_ERR(clp)) |
54ceac45 | 694 | return PTR_ERR(clp); |
54ceac45 | 695 | |
54ceac45 DH |
696 | server->nfs_client = clp; |
697 | ||
698 | /* Initialise the client representation from the mount data */ | |
38465f5d SM |
699 | server->flags = ctx->flags; |
700 | server->options = ctx->options; | |
ce62b114 TM |
701 | server->caps |= NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS; |
702 | ||
703 | switch (clp->rpc_ops->version) { | |
704 | case 2: | |
705 | server->fattr_valid = NFS_ATTR_FATTR_V2; | |
706 | break; | |
707 | case 3: | |
708 | server->fattr_valid = NFS_ATTR_FATTR_V3; | |
709 | break; | |
710 | default: | |
711 | server->fattr_valid = NFS_ATTR_FATTR_V4; | |
712 | } | |
54ceac45 | 713 | |
38465f5d SM |
714 | if (ctx->rsize) |
715 | server->rsize = nfs_block_size(ctx->rsize, NULL); | |
716 | if (ctx->wsize) | |
717 | server->wsize = nfs_block_size(ctx->wsize, NULL); | |
54ceac45 | 718 | |
38465f5d SM |
719 | server->acregmin = ctx->acregmin * HZ; |
720 | server->acregmax = ctx->acregmax * HZ; | |
721 | server->acdirmin = ctx->acdirmin * HZ; | |
722 | server->acdirmax = ctx->acdirmax * HZ; | |
54ceac45 DH |
723 | |
724 | /* Start lockd here, before we might error out */ | |
725 | error = nfs_start_lockd(server); | |
726 | if (error < 0) | |
727 | goto error; | |
728 | ||
38465f5d SM |
729 | server->port = ctx->nfs_server.port; |
730 | server->auth_info = ctx->auth_info; | |
f22d6d79 | 731 | |
a3f73c27 | 732 | error = nfs_init_server_rpcclient(server, &timeparms, |
38465f5d | 733 | ctx->selected_flavor); |
54ceac45 DH |
734 | if (error < 0) |
735 | goto error; | |
736 | ||
3f8400d1 | 737 | /* Preserve the values of mount_server-related mount options */ |
38465f5d SM |
738 | if (ctx->mount_server.addrlen) { |
739 | memcpy(&server->mountd_address, &ctx->mount_server.address, | |
740 | ctx->mount_server.addrlen); | |
741 | server->mountd_addrlen = ctx->mount_server.addrlen; | |
3f8400d1 | 742 | } |
38465f5d SM |
743 | server->mountd_version = ctx->mount_server.version; |
744 | server->mountd_port = ctx->mount_server.port; | |
745 | server->mountd_protocol = ctx->mount_server.protocol; | |
3f8400d1 | 746 | |
38465f5d | 747 | server->namelen = ctx->namlen; |
54ceac45 DH |
748 | return 0; |
749 | ||
750 | error: | |
751 | server->nfs_client = NULL; | |
752 | nfs_put_client(clp); | |
54ceac45 DH |
753 | return error; |
754 | } | |
755 | ||
756 | /* | |
757 | * Load up the server record from information gained in an fsinfo record | |
758 | */ | |
738fd0f3 | 759 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
738fd0f3 | 760 | struct nfs_fsinfo *fsinfo) |
54ceac45 | 761 | { |
04a5da69 | 762 | unsigned long max_rpc_payload, raw_max_rpc_payload; |
54ceac45 DH |
763 | |
764 | /* Work out a lot of parameters */ | |
765 | if (server->rsize == 0) | |
766 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
767 | if (server->wsize == 0) | |
768 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
769 | ||
770 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
771 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
772 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
773 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
774 | ||
04a5da69 FL |
775 | raw_max_rpc_payload = rpc_max_payload(server->client); |
776 | max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL); | |
777 | ||
54ceac45 DH |
778 | if (server->rsize > max_rpc_payload) |
779 | server->rsize = max_rpc_payload; | |
780 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
781 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 782 | server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e0bf68dd | 783 | |
54ceac45 DH |
784 | if (server->wsize > max_rpc_payload) |
785 | server->wsize = max_rpc_payload; | |
786 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
787 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
09cbfeaf | 788 | server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT; |
85e174ba | 789 | |
54ceac45 DH |
790 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
791 | ||
792 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
1a34c8c9 TM |
793 | if (server->dtsize > NFS_MAX_FILE_IO_SIZE) |
794 | server->dtsize = NFS_MAX_FILE_IO_SIZE; | |
54ceac45 DH |
795 | if (server->dtsize > server->rsize) |
796 | server->dtsize = server->rsize; | |
797 | ||
798 | if (server->flags & NFS_MOUNT_NOAC) { | |
799 | server->acregmin = server->acregmax = 0; | |
800 | server->acdirmin = server->acdirmax = 0; | |
801 | } | |
802 | ||
803 | server->maxfilesize = fsinfo->maxfilesize; | |
804 | ||
6b96724e | 805 | server->time_delta = fsinfo->time_delta; |
7f08a335 | 806 | server->change_attr_type = fsinfo->change_attr_type; |
6b96724e | 807 | |
2a92ee92 | 808 | server->clone_blksize = fsinfo->clone_blksize; |
54ceac45 DH |
809 | /* We're airborne Set socket buffersize */ |
810 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
04a5da69 FL |
811 | |
812 | #ifdef CONFIG_NFS_V4_2 | |
813 | /* | |
814 | * Defaults until limited by the session parameters. | |
815 | */ | |
816 | server->gxasize = min_t(unsigned int, raw_max_rpc_payload, | |
817 | XATTR_SIZE_MAX); | |
818 | server->sxasize = min_t(unsigned int, raw_max_rpc_payload, | |
819 | XATTR_SIZE_MAX); | |
820 | server->lxasize = min_t(unsigned int, raw_max_rpc_payload, | |
821 | nfs42_listxattr_xdrsize(XATTR_LIST_MAX)); | |
b78ef845 FL |
822 | |
823 | if (fsinfo->xattr_support) | |
824 | server->caps |= NFS_CAP_XATTR; | |
04a5da69 | 825 | #endif |
54ceac45 DH |
826 | } |
827 | ||
828 | /* | |
829 | * Probe filesystem information, including the FSID on v2/v3 | |
830 | */ | |
5fe1210d | 831 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
832 | { |
833 | struct nfs_fsinfo fsinfo; | |
834 | struct nfs_client *clp = server->nfs_client; | |
835 | int error; | |
836 | ||
54ceac45 DH |
837 | if (clp->rpc_ops->set_capabilities != NULL) { |
838 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
839 | if (error < 0) | |
4cbb9768 | 840 | return error; |
54ceac45 DH |
841 | } |
842 | ||
843 | fsinfo.fattr = fattr; | |
ca440c38 | 844 | fsinfo.nlayouttypes = 0; |
3132e49e | 845 | memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype)); |
54ceac45 DH |
846 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
847 | if (error < 0) | |
4cbb9768 | 848 | return error; |
54ceac45 | 849 | |
71f81e51 | 850 | nfs_server_set_fsinfo(server, &fsinfo); |
54ceac45 DH |
851 | |
852 | /* Get some general file system info */ | |
853 | if (server->namelen == 0) { | |
854 | struct nfs_pathconf pathinfo; | |
855 | ||
856 | pathinfo.fattr = fattr; | |
857 | nfs_fattr_init(fattr); | |
858 | ||
859 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
860 | server->namelen = pathinfo.max_namelen; | |
861 | } | |
862 | ||
54ceac45 | 863 | return 0; |
54ceac45 DH |
864 | } |
865 | ||
e5731131 AS |
866 | /* |
867 | * Grab the destination's particulars, including lease expiry time. | |
868 | * | |
869 | * Returns zero if probe succeeded and retrieved FSID matches the FSID | |
870 | * we have cached. | |
871 | */ | |
872 | int nfs_probe_server(struct nfs_server *server, struct nfs_fh *mntfh) | |
873 | { | |
874 | struct nfs_fattr *fattr; | |
875 | int error; | |
876 | ||
877 | fattr = nfs_alloc_fattr(); | |
878 | if (fattr == NULL) | |
879 | return -ENOMEM; | |
880 | ||
881 | /* Sanity: the probe won't work if the destination server | |
882 | * does not recognize the migrated FH. */ | |
883 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
884 | ||
885 | nfs_free_fattr(fattr); | |
886 | return error; | |
887 | } | |
888 | EXPORT_SYMBOL_GPL(nfs_probe_server); | |
889 | ||
54ceac45 DH |
890 | /* |
891 | * Copy useful information when duplicating a server record | |
892 | */ | |
fcf10398 | 893 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
894 | { |
895 | target->flags = source->flags; | |
356e76b8 CL |
896 | target->rsize = source->rsize; |
897 | target->wsize = source->wsize; | |
54ceac45 DH |
898 | target->acregmin = source->acregmin; |
899 | target->acregmax = source->acregmax; | |
900 | target->acdirmin = source->acdirmin; | |
901 | target->acdirmax = source->acdirmax; | |
902 | target->caps = source->caps; | |
2df54806 | 903 | target->options = source->options; |
0f5f49b8 | 904 | target->auth_info = source->auth_info; |
89a6814d | 905 | target->port = source->port; |
54ceac45 | 906 | } |
89d77c8f | 907 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 908 | |
fcf10398 | 909 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
910 | { |
911 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 912 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 913 | |
dc030858 | 914 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 915 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 916 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 917 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 918 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
919 | |
920 | } | |
89d77c8f | 921 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e | 922 | |
32e62b7c | 923 | void nfs_server_remove_lists(struct nfs_server *server) |
fca5238e | 924 | { |
d3b4c9d7 | 925 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 926 | struct nfs_net *nn; |
d3b4c9d7 | 927 | |
4c03ae4a TM |
928 | if (clp == NULL) |
929 | return; | |
73ea666c | 930 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 931 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 932 | list_del_rcu(&server->client_link); |
4c03ae4a | 933 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 934 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 935 | list_del(&server->master_link); |
dc030858 | 936 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
937 | |
938 | synchronize_rcu(); | |
939 | } | |
32e62b7c | 940 | EXPORT_SYMBOL_GPL(nfs_server_remove_lists); |
fca5238e | 941 | |
54ceac45 DH |
942 | /* |
943 | * Allocate and initialise a server record | |
944 | */ | |
fcf10398 | 945 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
946 | { |
947 | struct nfs_server *server; | |
948 | ||
949 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
950 | if (!server) | |
951 | return NULL; | |
952 | ||
953 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
954 | ||
955 | /* Zero out the NFS state stuff */ | |
956 | INIT_LIST_HEAD(&server->client_link); | |
957 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 958 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 959 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 960 | INIT_LIST_HEAD(&server->state_owners_lru); |
62164f31 | 961 | INIT_LIST_HEAD(&server->ss_copies); |
54ceac45 | 962 | |
ef818a28 SD |
963 | atomic_set(&server->active, 0); |
964 | ||
54ceac45 DH |
965 | server->io_stats = nfs_alloc_iostats(); |
966 | if (!server->io_stats) { | |
967 | kfree(server); | |
968 | return NULL; | |
969 | } | |
970 | ||
7f08a335 TM |
971 | server->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; |
972 | ||
9157c31d | 973 | ida_init(&server->openowner_id); |
d2d7ce28 | 974 | ida_init(&server->lockowner_id); |
f7e8917a | 975 | pnfs_init_server(server); |
68ebf8fe | 976 | rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC"); |
f7e8917a | 977 | |
54ceac45 DH |
978 | return server; |
979 | } | |
89d77c8f | 980 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
981 | |
982 | /* | |
983 | * Free up a server record | |
984 | */ | |
985 | void nfs_free_server(struct nfs_server *server) | |
986 | { | |
fca5238e | 987 | nfs_server_remove_lists(server); |
54ceac45 DH |
988 | |
989 | if (server->destroy != NULL) | |
990 | server->destroy(server); | |
5cef338b TM |
991 | |
992 | if (!IS_ERR(server->client_acl)) | |
993 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
994 | if (!IS_ERR(server->client)) |
995 | rpc_shutdown_client(server->client); | |
996 | ||
997 | nfs_put_client(server->nfs_client); | |
998 | ||
d2d7ce28 | 999 | ida_destroy(&server->lockowner_id); |
9157c31d | 1000 | ida_destroy(&server->openowner_id); |
54ceac45 | 1001 | nfs_free_iostats(server->io_stats); |
1a58e8a0 | 1002 | put_cred(server->cred); |
54ceac45 DH |
1003 | kfree(server); |
1004 | nfs_release_automount_timer(); | |
54ceac45 | 1005 | } |
89d77c8f | 1006 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
1007 | |
1008 | /* | |
1009 | * Create a version 2 or 3 volume record | |
1010 | * - keyed on server and FSID | |
1011 | */ | |
62a55d08 | 1012 | struct nfs_server *nfs_create_server(struct fs_context *fc) |
54ceac45 | 1013 | { |
62a55d08 | 1014 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
54ceac45 | 1015 | struct nfs_server *server; |
fbca779a | 1016 | struct nfs_fattr *fattr; |
54ceac45 DH |
1017 | int error; |
1018 | ||
1019 | server = nfs_alloc_server(); | |
1020 | if (!server) | |
1021 | return ERR_PTR(-ENOMEM); | |
1022 | ||
d18a9d3f | 1023 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 1024 | |
fbca779a TM |
1025 | error = -ENOMEM; |
1026 | fattr = nfs_alloc_fattr(); | |
1027 | if (fattr == NULL) | |
1028 | goto error; | |
1029 | ||
54ceac45 | 1030 | /* Get a client representation */ |
62a55d08 | 1031 | error = nfs_init_server(server, fc); |
54ceac45 DH |
1032 | if (error < 0) |
1033 | goto error; | |
1034 | ||
54ceac45 | 1035 | /* Probe the root fh to retrieve its FSID */ |
62a55d08 | 1036 | error = nfs_probe_fsinfo(server, ctx->mntfh, fattr); |
54ceac45 DH |
1037 | if (error < 0) |
1038 | goto error; | |
54af3bb5 TM |
1039 | if (server->nfs_client->rpc_ops->version == 3) { |
1040 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1041 | server->namelen = NFS3_MAXNAMLEN; | |
62a55d08 | 1042 | if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1043 | server->caps |= NFS_CAP_READDIRPLUS; |
1044 | } else { | |
1045 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1046 | server->namelen = NFS2_MAXNAMLEN; | |
1047 | } | |
1048 | ||
fbca779a | 1049 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
62a55d08 | 1050 | error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh, |
2ef61e0e | 1051 | fattr, NULL); |
54ceac45 DH |
1052 | if (error < 0) { |
1053 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1054 | goto error; | |
1055 | } | |
1056 | } | |
fbca779a | 1057 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1058 | |
6daabf1b DH |
1059 | dprintk("Server FSID: %llx:%llx\n", |
1060 | (unsigned long long) server->fsid.major, | |
1061 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1062 | |
fca5238e | 1063 | nfs_server_insert_lists(server); |
54ceac45 | 1064 | server->mount_time = jiffies; |
fbca779a | 1065 | nfs_free_fattr(fattr); |
54ceac45 DH |
1066 | return server; |
1067 | ||
1068 | error: | |
fbca779a | 1069 | nfs_free_fattr(fattr); |
54ceac45 DH |
1070 | nfs_free_server(server); |
1071 | return ERR_PTR(error); | |
1072 | } | |
ddda8e0a | 1073 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1074 | |
54ceac45 DH |
1075 | /* |
1076 | * Clone an NFS2, NFS3 or NFS4 server record | |
1077 | */ | |
1078 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1079 | struct nfs_fh *fh, | |
7e6eb683 BS |
1080 | struct nfs_fattr *fattr, |
1081 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1082 | { |
1083 | struct nfs_server *server; | |
54ceac45 DH |
1084 | int error; |
1085 | ||
54ceac45 DH |
1086 | server = nfs_alloc_server(); |
1087 | if (!server) | |
1088 | return ERR_PTR(-ENOMEM); | |
1089 | ||
1a58e8a0 TM |
1090 | server->cred = get_cred(source->cred); |
1091 | ||
54ceac45 DH |
1092 | /* Copy data from the source */ |
1093 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1094 | server->destroy = source->destroy; |
212bf41d | 1095 | refcount_inc(&server->nfs_client->cl_count); |
54ceac45 DH |
1096 | nfs_server_copy_userdata(server, source); |
1097 | ||
1098 | server->fsid = fattr->fsid; | |
1099 | ||
33170233 TM |
1100 | error = nfs_init_server_rpcclient(server, |
1101 | source->client->cl_timeout, | |
7e6eb683 | 1102 | flavor); |
54ceac45 DH |
1103 | if (error < 0) |
1104 | goto out_free_server; | |
54ceac45 DH |
1105 | |
1106 | /* probe the filesystem info for this server filesystem */ | |
4d4cf8d2 | 1107 | error = nfs_probe_server(server, fh); |
54ceac45 DH |
1108 | if (error < 0) |
1109 | goto out_free_server; | |
1110 | ||
54af3bb5 TM |
1111 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1112 | server->namelen = NFS4_MAXNAMLEN; | |
1113 | ||
54ceac45 DH |
1114 | error = nfs_start_lockd(server); |
1115 | if (error < 0) | |
1116 | goto out_free_server; | |
1117 | ||
fca5238e | 1118 | nfs_server_insert_lists(server); |
54ceac45 DH |
1119 | server->mount_time = jiffies; |
1120 | ||
54ceac45 DH |
1121 | return server; |
1122 | ||
1123 | out_free_server: | |
1124 | nfs_free_server(server); | |
54ceac45 DH |
1125 | return ERR_PTR(error); |
1126 | } | |
ddda8e0a | 1127 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1128 | |
6b13168b SK |
1129 | void nfs_clients_init(struct net *net) |
1130 | { | |
1131 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1132 | ||
1133 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1134 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1135 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1136 | idr_init(&nn->cb_ident_idr); |
1137 | #endif | |
4c03ae4a | 1138 | spin_lock_init(&nn->nfs_client_lock); |
2f86e091 | 1139 | nn->boot_time = ktime_get_real(); |
bf11fbdb TM |
1140 | |
1141 | nfs_netns_sysfs_setup(nn, net); | |
6b13168b SK |
1142 | } |
1143 | ||
10b7a70c TM |
1144 | void nfs_clients_exit(struct net *net) |
1145 | { | |
1146 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1147 | ||
bf11fbdb | 1148 | nfs_netns_sysfs_destroy(nn); |
10b7a70c TM |
1149 | nfs_cleanup_cb_ident_idr(net); |
1150 | WARN_ON_ONCE(!list_empty(&nn->nfs_client_list)); | |
1151 | WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list)); | |
1152 | } | |
1153 | ||
6aaca566 | 1154 | #ifdef CONFIG_PROC_FS |
6aaca566 DH |
1155 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); |
1156 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1157 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1158 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1159 | ||
88e9d34c | 1160 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1161 | .start = nfs_server_list_start, |
1162 | .next = nfs_server_list_next, | |
1163 | .stop = nfs_server_list_stop, | |
1164 | .show = nfs_server_list_show, | |
1165 | }; | |
1166 | ||
6aaca566 DH |
1167 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); |
1168 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1169 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1170 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1171 | ||
88e9d34c | 1172 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1173 | .start = nfs_volume_list_start, |
1174 | .next = nfs_volume_list_next, | |
1175 | .stop = nfs_volume_list_stop, | |
1176 | .show = nfs_volume_list_show, | |
1177 | }; | |
1178 | ||
6aaca566 DH |
1179 | /* |
1180 | * set up the iterator to start reading from the server list and return the first item | |
1181 | */ | |
1182 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1183 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1184 | { |
65b38851 | 1185 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6b13168b | 1186 | |
6aaca566 | 1187 | /* lock the list against modification */ |
dc030858 | 1188 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1189 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1190 | } |
1191 | ||
1192 | /* | |
1193 | * move to next server | |
1194 | */ | |
1195 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1196 | { | |
65b38851 | 1197 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
6b13168b SK |
1198 | |
1199 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1200 | } |
1201 | ||
1202 | /* | |
1203 | * clean up after reading from the transports list | |
1204 | */ | |
1205 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1206 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1207 | { |
65b38851 | 1208 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1209 | |
1210 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1211 | } |
1212 | ||
1213 | /* | |
1214 | * display a header line followed by a load of call lines | |
1215 | */ | |
1216 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1217 | { | |
1218 | struct nfs_client *clp; | |
65b38851 | 1219 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1220 | |
1221 | /* display header on line 1 */ | |
6b13168b | 1222 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1223 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | /* display one transport per line on subsequent lines */ | |
1228 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1229 | ||
940aab49 MN |
1230 | /* Check if the client is initialized */ |
1231 | if (clp->cl_cons_state != NFS_CS_READY) | |
1232 | return 0; | |
1233 | ||
2446ab60 | 1234 | rcu_read_lock(); |
5d8515ca | 1235 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1236 | clp->rpc_ops->version, |
5d8515ca CL |
1237 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1238 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
212bf41d | 1239 | refcount_read(&clp->cl_count), |
6aaca566 | 1240 | clp->cl_hostname); |
2446ab60 | 1241 | rcu_read_unlock(); |
6aaca566 DH |
1242 | |
1243 | return 0; | |
1244 | } | |
1245 | ||
6aaca566 DH |
1246 | /* |
1247 | * set up the iterator to start reading from the volume list and return the first item | |
1248 | */ | |
1249 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
8d11620e | 1250 | __acquires(&nn->nfs_client_lock) |
6aaca566 | 1251 | { |
65b38851 | 1252 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
c25d32b2 | 1253 | |
6aaca566 | 1254 | /* lock the list against modification */ |
dc030858 | 1255 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1256 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1257 | } |
1258 | ||
1259 | /* | |
1260 | * move to next volume | |
1261 | */ | |
1262 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1263 | { | |
65b38851 | 1264 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
c25d32b2 SK |
1265 | |
1266 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1267 | } |
1268 | ||
1269 | /* | |
1270 | * clean up after reading from the transports list | |
1271 | */ | |
1272 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
8d11620e | 1273 | __releases(&nn->nfs_client_lock) |
6aaca566 | 1274 | { |
65b38851 | 1275 | struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id); |
dc030858 SK |
1276 | |
1277 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1278 | } |
1279 | ||
1280 | /* | |
1281 | * display a header line followed by a load of call lines | |
1282 | */ | |
1283 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1284 | { | |
1285 | struct nfs_server *server; | |
1286 | struct nfs_client *clp; | |
df05a49f KM |
1287 | char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0' |
1288 | char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0' | |
65b38851 | 1289 | struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id); |
6aaca566 DH |
1290 | |
1291 | /* display header on line 1 */ | |
c25d32b2 | 1292 | if (v == &nn->nfs_volume_list) { |
df05a49f KM |
1293 | seq_puts(m, "NV SERVER PORT DEV FSID" |
1294 | " FSC\n"); | |
6aaca566 DH |
1295 | return 0; |
1296 | } | |
1297 | /* display one transport per line on subsequent lines */ | |
1298 | server = list_entry(v, struct nfs_server, master_link); | |
1299 | clp = server->nfs_client; | |
1300 | ||
df05a49f | 1301 | snprintf(dev, sizeof(dev), "%u:%u", |
6aaca566 DH |
1302 | MAJOR(server->s_dev), MINOR(server->s_dev)); |
1303 | ||
df05a49f | 1304 | snprintf(fsid, sizeof(fsid), "%llx:%llx", |
6daabf1b DH |
1305 | (unsigned long long) server->fsid.major, |
1306 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1307 | |
2446ab60 | 1308 | rcu_read_lock(); |
df05a49f | 1309 | seq_printf(m, "v%u %s %s %-12s %-33s %s\n", |
40c55319 | 1310 | clp->rpc_ops->version, |
5d8515ca CL |
1311 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1312 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1313 | dev, |
5d1acff1 DH |
1314 | fsid, |
1315 | nfs_server_fscache_state(server)); | |
2446ab60 | 1316 | rcu_read_unlock(); |
6aaca566 DH |
1317 | |
1318 | return 0; | |
1319 | } | |
1320 | ||
65b38851 EB |
1321 | int nfs_fs_proc_net_init(struct net *net) |
1322 | { | |
1323 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1324 | struct proc_dir_entry *p; | |
1325 | ||
1326 | nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net); | |
1327 | if (!nn->proc_nfsfs) | |
1328 | goto error_0; | |
1329 | ||
1330 | /* a file of servers with which we're dealing */ | |
c3506372 CH |
1331 | p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1332 | &nfs_server_list_ops, sizeof(struct seq_net_private)); | |
65b38851 EB |
1333 | if (!p) |
1334 | goto error_1; | |
1335 | ||
1336 | /* a file of volumes that we have mounted */ | |
c3506372 CH |
1337 | p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs, |
1338 | &nfs_volume_list_ops, sizeof(struct seq_net_private)); | |
65b38851 | 1339 | if (!p) |
21e81002 | 1340 | goto error_1; |
65b38851 EB |
1341 | return 0; |
1342 | ||
65b38851 | 1343 | error_1: |
21e81002 | 1344 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1345 | error_0: |
1346 | return -ENOMEM; | |
1347 | } | |
1348 | ||
1349 | void nfs_fs_proc_net_exit(struct net *net) | |
1350 | { | |
21e81002 | 1351 | remove_proc_subtree("nfsfs", net->proc_net); |
65b38851 EB |
1352 | } |
1353 | ||
6aaca566 DH |
1354 | /* |
1355 | * initialise the /proc/fs/nfsfs/ directory | |
1356 | */ | |
1357 | int __init nfs_fs_proc_init(void) | |
1358 | { | |
6a062a36 | 1359 | if (!proc_mkdir("fs/nfsfs", NULL)) |
6aaca566 DH |
1360 | goto error_0; |
1361 | ||
6aaca566 | 1362 | /* a file of servers with which we're dealing */ |
6a062a36 | 1363 | if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers")) |
6aaca566 DH |
1364 | goto error_1; |
1365 | ||
6aaca566 | 1366 | /* a file of volumes that we have mounted */ |
6a062a36 KM |
1367 | if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes")) |
1368 | goto error_1; | |
6aaca566 | 1369 | |
6a062a36 | 1370 | return 0; |
6aaca566 | 1371 | error_1: |
6a062a36 | 1372 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1373 | error_0: |
1374 | return -ENOMEM; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * clean up the /proc/fs/nfsfs/ directory | |
1379 | */ | |
1380 | void nfs_fs_proc_exit(void) | |
1381 | { | |
6a062a36 | 1382 | remove_proc_subtree("fs/nfsfs", NULL); |
6aaca566 DH |
1383 | } |
1384 | ||
1385 | #endif /* CONFIG_PROC_FS */ |