Commit | Line | Data |
---|---|---|
24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 | 37 | #include <linux/in6.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
40401530 | 39 | #include <linux/idr.h> |
3b0d3f93 | 40 | #include <net/ipv6.h> |
24c8dbbb | 41 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 42 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
43 | #include <linux/nsproxy.h> |
44 | #include <linux/pid_namespace.h> | |
24c8dbbb | 45 | |
24c8dbbb DH |
46 | |
47 | #include "nfs4_fs.h" | |
48 | #include "callback.h" | |
49 | #include "delegation.h" | |
50 | #include "iostat.h" | |
51 | #include "internal.h" | |
14727281 | 52 | #include "fscache.h" |
85e174ba | 53 | #include "pnfs.h" |
ab7017a3 | 54 | #include "nfs.h" |
6b13168b | 55 | #include "netns.h" |
24c8dbbb DH |
56 | |
57 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
58 | ||
24c8dbbb | 59 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
ab7017a3 BS |
60 | static DEFINE_SPINLOCK(nfs_version_lock); |
61 | static DEFINE_MUTEX(nfs_version_mutex); | |
62 | static LIST_HEAD(nfs_versions); | |
24c8dbbb | 63 | |
5006a76c DH |
64 | /* |
65 | * RPC cruft for NFS | |
66 | */ | |
a613fa16 | 67 | static const struct rpc_version *nfs_version[5] = { |
ab7017a3 BS |
68 | [2] = NULL, |
69 | [3] = NULL, | |
70 | [4] = NULL, | |
5006a76c DH |
71 | }; |
72 | ||
a613fa16 | 73 | const struct rpc_program nfs_program = { |
5006a76c DH |
74 | .name = "nfs", |
75 | .number = NFS_PROGRAM, | |
76 | .nrvers = ARRAY_SIZE(nfs_version), | |
77 | .version = nfs_version, | |
78 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 79 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
80 | }; |
81 | ||
82 | struct rpc_stat nfs_rpcstat = { | |
83 | .program = &nfs_program | |
84 | }; | |
85 | ||
ab7017a3 BS |
86 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
87 | { | |
88 | struct nfs_subversion *nfs; | |
89 | spin_lock(&nfs_version_lock); | |
90 | ||
91 | list_for_each_entry(nfs, &nfs_versions, list) { | |
92 | if (nfs->rpc_ops->version == version) { | |
93 | spin_unlock(&nfs_version_lock); | |
94 | return nfs; | |
95 | } | |
96 | }; | |
97 | ||
98 | spin_unlock(&nfs_version_lock); | |
99 | return ERR_PTR(-EPROTONOSUPPORT);; | |
100 | } | |
101 | ||
102 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
103 | { | |
104 | struct nfs_subversion *nfs = find_nfs_version(version); | |
105 | ||
106 | if (IS_ERR(nfs)) { | |
107 | mutex_lock(&nfs_version_mutex); | |
108 | request_module("nfs%d", version); | |
109 | nfs = find_nfs_version(version); | |
110 | mutex_unlock(&nfs_version_mutex); | |
111 | } | |
112 | ||
113 | if (!IS_ERR(nfs)) | |
114 | try_module_get(nfs->owner); | |
115 | return nfs; | |
116 | } | |
117 | ||
118 | void put_nfs_version(struct nfs_subversion *nfs) | |
119 | { | |
120 | module_put(nfs->owner); | |
121 | } | |
122 | ||
123 | void register_nfs_version(struct nfs_subversion *nfs) | |
124 | { | |
125 | spin_lock(&nfs_version_lock); | |
126 | ||
127 | list_add(&nfs->list, &nfs_versions); | |
128 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
129 | ||
130 | spin_unlock(&nfs_version_lock); | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
133 | ||
134 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
135 | { | |
136 | spin_lock(&nfs_version_lock); | |
137 | ||
138 | nfs_version[nfs->rpc_ops->version] = NULL; | |
139 | list_del(&nfs->list); | |
140 | ||
141 | spin_unlock(&nfs_version_lock); | |
142 | } | |
143 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
144 | ||
145 | /* | |
146 | * Preload all configured NFS versions during module init. | |
147 | * This function should be edited after each protocol is converted, | |
148 | * and eventually removed. | |
149 | */ | |
150 | int __init nfs_register_versions(void) | |
151 | { | |
152 | int err = init_nfs_v2(); | |
153 | if (err) | |
154 | return err; | |
155 | ||
156 | err = init_nfs_v3(); | |
157 | if (err) | |
158 | return err; | |
159 | ||
160 | return init_nfs_v4(); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Remove each pre-loaded NFS version | |
165 | */ | |
166 | void nfs_unregister_versions(void) | |
167 | { | |
168 | exit_nfs_v2(); | |
169 | exit_nfs_v3(); | |
170 | exit_nfs_v4(); | |
171 | } | |
172 | ||
24c8dbbb DH |
173 | /* |
174 | * Allocate a shared client record | |
175 | * | |
176 | * Since these are allocated/deallocated very rarely, we don't | |
177 | * bother putting them in a slab cache... | |
178 | */ | |
6663ee7f | 179 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
180 | { |
181 | struct nfs_client *clp; | |
7c67db3a | 182 | struct rpc_cred *cred; |
a21bdd9b | 183 | int err = -ENOMEM; |
24c8dbbb DH |
184 | |
185 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
186 | goto error_0; | |
187 | ||
ab7017a3 BS |
188 | clp->cl_nfs_mod = cl_init->nfs_mod; |
189 | try_module_get(clp->cl_nfs_mod->owner); | |
190 | ||
191 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 192 | |
24c8dbbb DH |
193 | atomic_set(&clp->cl_count, 1); |
194 | clp->cl_cons_state = NFS_CS_INITING; | |
195 | ||
6e4cffd7 CL |
196 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
197 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 198 | |
3a498026 | 199 | if (cl_init->hostname) { |
a21bdd9b | 200 | err = -ENOMEM; |
3a498026 | 201 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 202 | if (!clp->cl_hostname) |
71468513 | 203 | goto error_cleanup; |
24c8dbbb DH |
204 | } |
205 | ||
206 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
207 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
208 | ||
59dca3b2 | 209 | clp->cl_proto = cl_init->proto; |
73ea666c | 210 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 211 | |
68c97153 | 212 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
213 | if (!IS_ERR(cred)) |
214 | clp->cl_machine_cred = cred; | |
14727281 DH |
215 | nfs_fscache_get_client_cookie(clp); |
216 | ||
24c8dbbb DH |
217 | return clp; |
218 | ||
71468513 | 219 | error_cleanup: |
ab7017a3 | 220 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
221 | kfree(clp); |
222 | error_0: | |
a21bdd9b | 223 | return ERR_PTR(err); |
24c8dbbb DH |
224 | } |
225 | ||
5dd3177a | 226 | #ifdef CONFIG_NFS_V4 |
f4eecd5d | 227 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ |
28cd1b3f | 228 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 229 | { |
28cd1b3f SK |
230 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
231 | ||
232 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
233 | } |
234 | ||
235 | /* nfs_client_lock held */ | |
236 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
237 | { | |
73ea666c | 238 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 239 | |
f4eecd5d | 240 | if (clp->cl_cb_ident) |
28cd1b3f | 241 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
242 | } |
243 | ||
f7e8917a FI |
244 | static void pnfs_init_server(struct nfs_server *server) |
245 | { | |
246 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
247 | } | |
248 | ||
888ef2e3 | 249 | #else |
28cd1b3f | 250 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
251 | { |
252 | } | |
253 | ||
254 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
255 | { | |
256 | } | |
f7e8917a FI |
257 | |
258 | static void pnfs_init_server(struct nfs_server *server) | |
259 | { | |
260 | } | |
261 | ||
888ef2e3 | 262 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 263 | |
24c8dbbb DH |
264 | /* |
265 | * Destroy a shared client record | |
266 | */ | |
cdb7eced | 267 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 268 | { |
40c55319 | 269 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 270 | |
14727281 DH |
271 | nfs_fscache_release_client_cookie(clp); |
272 | ||
24c8dbbb DH |
273 | /* -EIO all pending I/O */ |
274 | if (!IS_ERR(clp->cl_rpcclient)) | |
275 | rpc_shutdown_client(clp->cl_rpcclient); | |
276 | ||
7c67db3a TM |
277 | if (clp->cl_machine_cred != NULL) |
278 | put_rpccred(clp->cl_machine_cred); | |
279 | ||
73ea666c | 280 | put_net(clp->cl_net); |
ab7017a3 | 281 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
282 | kfree(clp->cl_hostname); |
283 | kfree(clp); | |
284 | ||
285 | dprintk("<-- nfs_free_client()\n"); | |
286 | } | |
287 | ||
288 | /* | |
289 | * Release a reference to a shared client record | |
290 | */ | |
291 | void nfs_put_client(struct nfs_client *clp) | |
292 | { | |
dc030858 SK |
293 | struct nfs_net *nn; |
294 | ||
27ba8512 DH |
295 | if (!clp) |
296 | return; | |
297 | ||
24c8dbbb | 298 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 299 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 300 | |
dc030858 | 301 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 302 | list_del(&clp->cl_share_link); |
f4eecd5d | 303 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 304 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb DH |
305 | |
306 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
307 | ||
cdb7eced | 308 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
309 | } |
310 | } | |
16b374ca | 311 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 312 | |
9082a5cc | 313 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
314 | /* |
315 | * Test if two ip6 socket addresses refer to the same socket by | |
316 | * comparing relevant fields. The padding bytes specifically, are not | |
317 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
318 | * and sin6_scope_id is only compared if the address is "link local" | |
319 | * because "link local" addresses need only be unique to a specific | |
320 | * link. Conversely, ordinary unicast addresses might have different | |
321 | * sin6_scope_id. | |
322 | * | |
323 | * The caller should ensure both socket addresses are AF_INET6. | |
324 | */ | |
3c8c45df CL |
325 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
326 | const struct sockaddr *sa2) | |
9f4c899c | 327 | { |
3c8c45df CL |
328 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
329 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 330 | |
b9dd3abb | 331 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 332 | return 0; |
b9dd3abb MJ |
333 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
334 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 335 | |
b9dd3abb | 336 | return 1; |
3b0d3f93 | 337 | } |
3c8c45df CL |
338 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
339 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
340 | const struct sockaddr *sa2) | |
9f4c899c TM |
341 | { |
342 | return 0; | |
343 | } | |
9082a5cc | 344 | #endif |
3b0d3f93 | 345 | |
d7371c41 ID |
346 | /* |
347 | * Test if two ip4 socket addresses refer to the same socket, by | |
348 | * comparing relevant fields. The padding bytes specifically, are | |
349 | * not compared. | |
350 | * | |
351 | * The caller should ensure both socket addresses are AF_INET. | |
352 | */ | |
3c8c45df CL |
353 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
354 | const struct sockaddr *sa2) | |
355 | { | |
356 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
357 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
358 | ||
359 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
360 | } | |
361 | ||
362 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
363 | const struct sockaddr *sa2) | |
364 | { | |
365 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
366 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
367 | ||
368 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
369 | (sin1->sin6_port == sin2->sin6_port); | |
370 | } | |
371 | ||
9f4c899c TM |
372 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
373 | const struct sockaddr *sa2) | |
d7371c41 | 374 | { |
3c8c45df CL |
375 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
376 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 377 | |
3c8c45df CL |
378 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
379 | (sin1->sin_port == sin2->sin_port); | |
380 | } | |
381 | ||
4b7c8dd2 | 382 | #if defined(CONFIG_NFS_V4_1) |
3c8c45df CL |
383 | /* |
384 | * Test if two socket addresses represent the same actual socket, | |
385 | * by comparing (only) relevant fields, excluding the port number. | |
386 | */ | |
fcf10398 BS |
387 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
388 | const struct sockaddr *sa2) | |
3c8c45df CL |
389 | { |
390 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 391 | return 0; |
3c8c45df CL |
392 | |
393 | switch (sa1->sa_family) { | |
394 | case AF_INET: | |
395 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
396 | case AF_INET6: | |
397 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
398 | } | |
399 | return 0; | |
d7371c41 | 400 | } |
4b7c8dd2 | 401 | #endif /* CONFIG_NFS_V4_1 */ |
d7371c41 | 402 | |
d7371c41 ID |
403 | /* |
404 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 405 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
406 | */ |
407 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
408 | const struct sockaddr *sa2) | |
409 | { | |
410 | if (sa1->sa_family != sa2->sa_family) | |
411 | return 0; | |
412 | ||
413 | switch (sa1->sa_family) { | |
414 | case AF_INET: | |
9f4c899c | 415 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 416 | case AF_INET6: |
9f4c899c | 417 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
418 | } |
419 | return 0; | |
420 | } | |
421 | ||
24c8dbbb | 422 | /* |
c81468a1 TM |
423 | * Find an nfs_client on the list that matches the initialisation data |
424 | * that is supplied. | |
24c8dbbb | 425 | */ |
c81468a1 | 426 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
427 | { |
428 | struct nfs_client *clp; | |
d7371c41 | 429 | const struct sockaddr *sap = data->addr; |
6b13168b | 430 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 431 | |
6b13168b | 432 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 433 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
434 | /* Don't match clients that failed to initialise properly */ |
435 | if (clp->cl_cons_state < 0) | |
436 | continue; | |
437 | ||
438 | /* Different NFS versions cannot share the same nfs_client */ | |
ab7017a3 | 439 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
440 | continue; |
441 | ||
59dca3b2 TM |
442 | if (clp->cl_proto != data->proto) |
443 | continue; | |
5aae4a9a BH |
444 | /* Match nfsv4 minorversion */ |
445 | if (clp->cl_minorversion != data->minorversion) | |
446 | continue; | |
c81468a1 | 447 | /* Match the full socket address */ |
d7371c41 | 448 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
449 | continue; |
450 | ||
451 | atomic_inc(&clp->cl_count); | |
452 | return clp; | |
13bbc06a | 453 | } |
c81468a1 | 454 | return NULL; |
24c8dbbb DH |
455 | } |
456 | ||
4697bd5e TM |
457 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
458 | { | |
459 | return clp->cl_cons_state != NFS_CS_INITING; | |
460 | } | |
461 | ||
462 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
463 | { | |
464 | return wait_event_killable(nfs_client_active_wq, | |
465 | nfs_client_init_is_complete(clp)); | |
466 | } | |
467 | ||
f411703a CL |
468 | /* |
469 | * Found an existing client. Make sure it's ready before returning. | |
470 | */ | |
471 | static struct nfs_client * | |
472 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
473 | struct nfs_client *clp) | |
474 | { | |
475 | int error; | |
476 | ||
4697bd5e | 477 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
478 | if (error < 0) { |
479 | nfs_put_client(clp); | |
480 | return ERR_PTR(-ERESTARTSYS); | |
481 | } | |
482 | ||
483 | if (clp->cl_cons_state < NFS_CS_READY) { | |
484 | error = clp->cl_cons_state; | |
485 | nfs_put_client(clp); | |
486 | return ERR_PTR(error); | |
487 | } | |
488 | ||
54ac471c TM |
489 | smp_rmb(); |
490 | ||
f411703a CL |
491 | dprintk("<-- %s found nfs_client %p for %s\n", |
492 | __func__, clp, cl_init->hostname ?: ""); | |
493 | return clp; | |
494 | } | |
495 | ||
24c8dbbb DH |
496 | /* |
497 | * Look up a client by IP address and protocol version | |
498 | * - creates a new record if one doesn't yet exist | |
499 | */ | |
fcf10398 | 500 | struct nfs_client * |
45a52a02 AA |
501 | nfs_get_client(const struct nfs_client_initdata *cl_init, |
502 | const struct rpc_timeout *timeparms, | |
503 | const char *ip_addr, | |
4bf590e0 | 504 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
505 | { |
506 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 507 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 508 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 509 | |
d7422c47 | 510 | dprintk("--> nfs_get_client(%s,v%u)\n", |
ab7017a3 | 511 | cl_init->hostname ?: "", rpc_ops->version); |
24c8dbbb DH |
512 | |
513 | /* see if the client already exists */ | |
514 | do { | |
dc030858 | 515 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 516 | |
c81468a1 | 517 | clp = nfs_match_client(cl_init); |
f411703a CL |
518 | if (clp) { |
519 | spin_unlock(&nn->nfs_client_lock); | |
520 | if (new) | |
cdb7eced | 521 | new->rpc_ops->free_client(new); |
f411703a CL |
522 | return nfs_found_client(cl_init, clp); |
523 | } | |
8cab4c39 CL |
524 | if (new) { |
525 | list_add(&new->cl_share_link, &nn->nfs_client_list); | |
526 | spin_unlock(&nn->nfs_client_lock); | |
4bf590e0 | 527 | new->cl_flags = cl_init->init_flags; |
ab7017a3 BS |
528 | return rpc_ops->init_client(new, timeparms, ip_addr, |
529 | authflavour); | |
8cab4c39 | 530 | } |
24c8dbbb | 531 | |
dc030858 | 532 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 533 | |
ab7017a3 | 534 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 535 | } while (!IS_ERR(new)); |
24c8dbbb | 536 | |
f411703a CL |
537 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
538 | cl_init->hostname ?: "", PTR_ERR(new)); | |
a21bdd9b | 539 | return new; |
24c8dbbb DH |
540 | } |
541 | ||
542 | /* | |
543 | * Mark a server as ready or failed | |
544 | */ | |
76db6d95 | 545 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 546 | { |
54ac471c | 547 | smp_wmb(); |
24c8dbbb DH |
548 | clp->cl_cons_state = state; |
549 | wake_up_all(&nfs_client_active_wq); | |
550 | } | |
5006a76c DH |
551 | |
552 | /* | |
553 | * Initialise the timeout values for a connection | |
554 | */ | |
fcf10398 | 555 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
5006a76c DH |
556 | unsigned int timeo, unsigned int retrans) |
557 | { | |
558 | to->to_initval = timeo * HZ / 10; | |
559 | to->to_retries = retrans; | |
5006a76c DH |
560 | |
561 | switch (proto) { | |
0896a725 | 562 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 563 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
564 | if (to->to_retries == 0) |
565 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 566 | if (to->to_initval == 0) |
259875ef | 567 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
568 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
569 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
570 | to->to_increment = to->to_initval; | |
571 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
572 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
573 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
574 | if (to->to_maxval < to->to_initval) | |
575 | to->to_maxval = to->to_initval; | |
5006a76c DH |
576 | to->to_exponential = 0; |
577 | break; | |
0896a725 | 578 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
579 | if (to->to_retries == 0) |
580 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 581 | if (!to->to_initval) |
259875ef | 582 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
583 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
584 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
585 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
586 | to->to_exponential = 1; | |
587 | break; | |
259875ef TM |
588 | default: |
589 | BUG(); | |
5006a76c DH |
590 | } |
591 | } | |
592 | ||
593 | /* | |
594 | * Create an RPC client handle | |
595 | */ | |
428360d7 BS |
596 | int nfs_create_rpc_client(struct nfs_client *clp, |
597 | const struct rpc_timeout *timeparms, | |
598 | rpc_authflavor_t flavor) | |
5006a76c | 599 | { |
5006a76c | 600 | struct rpc_clnt *clnt = NULL; |
41877d20 | 601 | struct rpc_create_args args = { |
73ea666c | 602 | .net = clp->cl_net, |
59dca3b2 | 603 | .protocol = clp->cl_proto, |
41877d20 | 604 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 605 | .addrsize = clp->cl_addrlen, |
33170233 | 606 | .timeout = timeparms, |
41877d20 CL |
607 | .servername = clp->cl_hostname, |
608 | .program = &nfs_program, | |
609 | .version = clp->rpc_ops->version, | |
610 | .authflavor = flavor, | |
611 | }; | |
5006a76c | 612 | |
4bf590e0 | 613 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 614 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
4bf590e0 | 615 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 CL |
616 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
617 | ||
5006a76c DH |
618 | if (!IS_ERR(clp->cl_rpcclient)) |
619 | return 0; | |
620 | ||
41877d20 | 621 | clnt = rpc_create(&args); |
5006a76c DH |
622 | if (IS_ERR(clnt)) { |
623 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 624 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
625 | return PTR_ERR(clnt); |
626 | } | |
627 | ||
5006a76c DH |
628 | clp->cl_rpcclient = clnt; |
629 | return 0; | |
630 | } | |
54ceac45 DH |
631 | |
632 | /* | |
633 | * Version 2 or 3 client destruction | |
634 | */ | |
635 | static void nfs_destroy_server(struct nfs_server *server) | |
636 | { | |
5eebde23 SJ |
637 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
638 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 639 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
640 | } |
641 | ||
642 | /* | |
643 | * Version 2 or 3 lockd setup | |
644 | */ | |
645 | static int nfs_start_lockd(struct nfs_server *server) | |
646 | { | |
9289e7f9 CL |
647 | struct nlm_host *host; |
648 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
649 | struct nlmclnt_initdata nlm_init = { |
650 | .hostname = clp->cl_hostname, | |
651 | .address = (struct sockaddr *)&clp->cl_addr, | |
652 | .addrlen = clp->cl_addrlen, | |
883bb163 | 653 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
654 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
655 | 1 : 0, | |
73ea666c | 656 | .net = clp->cl_net, |
883bb163 | 657 | }; |
54ceac45 | 658 | |
883bb163 | 659 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 660 | return 0; |
5eebde23 SJ |
661 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
662 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
663 | return 0; |
664 | ||
8a6e5deb TM |
665 | switch (clp->cl_proto) { |
666 | default: | |
667 | nlm_init.protocol = IPPROTO_TCP; | |
668 | break; | |
669 | case XPRT_TRANSPORT_UDP: | |
670 | nlm_init.protocol = IPPROTO_UDP; | |
671 | } | |
672 | ||
883bb163 | 673 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
674 | if (IS_ERR(host)) |
675 | return PTR_ERR(host); | |
676 | ||
677 | server->nlm_host = host; | |
678 | server->destroy = nfs_destroy_server; | |
679 | return 0; | |
54ceac45 DH |
680 | } |
681 | ||
54ceac45 DH |
682 | /* |
683 | * Create a general RPC client | |
684 | */ | |
fcf10398 | 685 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
686 | const struct rpc_timeout *timeo, |
687 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
688 | { |
689 | struct nfs_client *clp = server->nfs_client; | |
690 | ||
691 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
692 | if (IS_ERR(server->client)) { | |
3110ff80 | 693 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
694 | return PTR_ERR(server->client); |
695 | } | |
696 | ||
33170233 TM |
697 | memcpy(&server->client->cl_timeout_default, |
698 | timeo, | |
699 | sizeof(server->client->cl_timeout_default)); | |
700 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
701 | ||
54ceac45 DH |
702 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
703 | struct rpc_auth *auth; | |
704 | ||
705 | auth = rpcauth_create(pseudoflavour, server->client); | |
706 | if (IS_ERR(auth)) { | |
3110ff80 | 707 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
708 | return PTR_ERR(auth); |
709 | } | |
710 | } | |
711 | server->client->cl_softrtry = 0; | |
712 | if (server->flags & NFS_MOUNT_SOFT) | |
713 | server->client->cl_softrtry = 1; | |
714 | ||
54ceac45 DH |
715 | return 0; |
716 | } | |
717 | ||
8cab4c39 CL |
718 | /** |
719 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
720 | * | |
721 | * @clp: nfs_client to initialise | |
722 | * @timeparms: timeout parameters for underlying RPC transport | |
723 | * @ip_addr: IP presentation address (not used) | |
724 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
725 | * |
726 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 727 | */ |
8cab4c39 CL |
728 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
729 | const struct rpc_timeout *timeparms, | |
4bf590e0 | 730 | const char *ip_addr, rpc_authflavor_t authflavour) |
54ceac45 | 731 | { |
54ceac45 DH |
732 | int error; |
733 | ||
734 | if (clp->cl_cons_state == NFS_CS_READY) { | |
735 | /* the client is already initialised */ | |
736 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 737 | return clp; |
54ceac45 DH |
738 | } |
739 | ||
54ceac45 DH |
740 | /* |
741 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
742 | * - RFC 2623, sec 2.3.2 | |
743 | */ | |
4bf590e0 | 744 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
745 | if (error < 0) |
746 | goto error; | |
747 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 748 | return clp; |
54ceac45 DH |
749 | |
750 | error: | |
751 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 752 | nfs_put_client(clp); |
54ceac45 | 753 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 754 | return ERR_PTR(error); |
54ceac45 DH |
755 | } |
756 | ||
757 | /* | |
758 | * Create a version 2 or 3 client | |
759 | */ | |
2283f8d6 | 760 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
761 | const struct nfs_parsed_mount_data *data, |
762 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 763 | { |
3a498026 TM |
764 | struct nfs_client_initdata cl_init = { |
765 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 766 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 767 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 768 | .nfs_mod = nfs_mod, |
59dca3b2 | 769 | .proto = data->nfs_server.protocol, |
e50a7a1a | 770 | .net = data->net, |
3a498026 | 771 | }; |
33170233 | 772 | struct rpc_timeout timeparms; |
54ceac45 | 773 | struct nfs_client *clp; |
3a498026 | 774 | int error; |
54ceac45 DH |
775 | |
776 | dprintk("--> nfs_init_server()\n"); | |
777 | ||
45a52a02 AA |
778 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
779 | data->timeo, data->retrans); | |
4bf590e0 CL |
780 | if (data->flags & NFS_MOUNT_NORESVPORT) |
781 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 782 | |
54ceac45 | 783 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 784 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
785 | if (IS_ERR(clp)) { |
786 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
787 | return PTR_ERR(clp); | |
788 | } | |
789 | ||
54ceac45 DH |
790 | server->nfs_client = clp; |
791 | ||
792 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 793 | server->flags = data->flags; |
b797cac7 | 794 | server->options = data->options; |
62ab460c TM |
795 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
796 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
3a1556e8 | 797 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; |
54ceac45 DH |
798 | |
799 | if (data->rsize) | |
800 | server->rsize = nfs_block_size(data->rsize, NULL); | |
801 | if (data->wsize) | |
802 | server->wsize = nfs_block_size(data->wsize, NULL); | |
803 | ||
804 | server->acregmin = data->acregmin * HZ; | |
805 | server->acregmax = data->acregmax * HZ; | |
806 | server->acdirmin = data->acdirmin * HZ; | |
807 | server->acdirmax = data->acdirmax * HZ; | |
808 | ||
809 | /* Start lockd here, before we might error out */ | |
810 | error = nfs_start_lockd(server); | |
811 | if (error < 0) | |
812 | goto error; | |
813 | ||
f22d6d79 CL |
814 | server->port = data->nfs_server.port; |
815 | ||
33170233 | 816 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
817 | if (error < 0) |
818 | goto error; | |
819 | ||
3f8400d1 CL |
820 | /* Preserve the values of mount_server-related mount options */ |
821 | if (data->mount_server.addrlen) { | |
822 | memcpy(&server->mountd_address, &data->mount_server.address, | |
823 | data->mount_server.addrlen); | |
824 | server->mountd_addrlen = data->mount_server.addrlen; | |
825 | } | |
826 | server->mountd_version = data->mount_server.version; | |
827 | server->mountd_port = data->mount_server.port; | |
828 | server->mountd_protocol = data->mount_server.protocol; | |
829 | ||
54ceac45 | 830 | server->namelen = data->namlen; |
54ceac45 DH |
831 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
832 | return 0; | |
833 | ||
834 | error: | |
835 | server->nfs_client = NULL; | |
836 | nfs_put_client(clp); | |
837 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
838 | return error; | |
839 | } | |
840 | ||
841 | /* | |
842 | * Load up the server record from information gained in an fsinfo record | |
843 | */ | |
738fd0f3 BH |
844 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
845 | struct nfs_fh *mntfh, | |
846 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
847 | { |
848 | unsigned long max_rpc_payload; | |
849 | ||
850 | /* Work out a lot of parameters */ | |
851 | if (server->rsize == 0) | |
852 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
853 | if (server->wsize == 0) | |
854 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
855 | ||
856 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
857 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
858 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
859 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
860 | ||
861 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
862 | if (server->rsize > max_rpc_payload) | |
863 | server->rsize = max_rpc_payload; | |
864 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
865 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
866 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 867 | |
d993831f | 868 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
869 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
870 | ||
871 | if (server->wsize > max_rpc_payload) | |
872 | server->wsize = max_rpc_payload; | |
873 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
874 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
875 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 876 | server->pnfs_blksize = fsinfo->blksize; |
85e174ba | 877 | |
54ceac45 DH |
878 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
879 | ||
880 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
881 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
882 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
883 | if (server->dtsize > server->rsize) |
884 | server->dtsize = server->rsize; | |
885 | ||
886 | if (server->flags & NFS_MOUNT_NOAC) { | |
887 | server->acregmin = server->acregmax = 0; | |
888 | server->acdirmin = server->acdirmax = 0; | |
889 | } | |
890 | ||
891 | server->maxfilesize = fsinfo->maxfilesize; | |
892 | ||
6b96724e RL |
893 | server->time_delta = fsinfo->time_delta; |
894 | ||
54ceac45 DH |
895 | /* We're airborne Set socket buffersize */ |
896 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
897 | } | |
898 | ||
899 | /* | |
900 | * Probe filesystem information, including the FSID on v2/v3 | |
901 | */ | |
fcf10398 | 902 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
903 | { |
904 | struct nfs_fsinfo fsinfo; | |
905 | struct nfs_client *clp = server->nfs_client; | |
906 | int error; | |
907 | ||
908 | dprintk("--> nfs_probe_fsinfo()\n"); | |
909 | ||
910 | if (clp->rpc_ops->set_capabilities != NULL) { | |
911 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
912 | if (error < 0) | |
913 | goto out_error; | |
914 | } | |
915 | ||
916 | fsinfo.fattr = fattr; | |
85e174ba | 917 | fsinfo.layouttype = 0; |
54ceac45 DH |
918 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
919 | if (error < 0) | |
920 | goto out_error; | |
921 | ||
738fd0f3 | 922 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
923 | |
924 | /* Get some general file system info */ | |
925 | if (server->namelen == 0) { | |
926 | struct nfs_pathconf pathinfo; | |
927 | ||
928 | pathinfo.fattr = fattr; | |
929 | nfs_fattr_init(fattr); | |
930 | ||
931 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
932 | server->namelen = pathinfo.max_namelen; | |
933 | } | |
934 | ||
935 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
936 | return 0; | |
937 | ||
938 | out_error: | |
939 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
940 | return error; | |
941 | } | |
942 | ||
943 | /* | |
944 | * Copy useful information when duplicating a server record | |
945 | */ | |
fcf10398 | 946 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
947 | { |
948 | target->flags = source->flags; | |
356e76b8 CL |
949 | target->rsize = source->rsize; |
950 | target->wsize = source->wsize; | |
54ceac45 DH |
951 | target->acregmin = source->acregmin; |
952 | target->acregmax = source->acregmax; | |
953 | target->acdirmin = source->acdirmin; | |
954 | target->acdirmax = source->acdirmax; | |
955 | target->caps = source->caps; | |
2df54806 | 956 | target->options = source->options; |
54ceac45 DH |
957 | } |
958 | ||
fcf10398 | 959 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
960 | { |
961 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 962 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 963 | |
dc030858 | 964 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 965 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 966 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 967 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 968 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
969 | |
970 | } | |
971 | ||
972 | static void nfs_server_remove_lists(struct nfs_server *server) | |
973 | { | |
d3b4c9d7 | 974 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 975 | struct nfs_net *nn; |
d3b4c9d7 | 976 | |
4c03ae4a TM |
977 | if (clp == NULL) |
978 | return; | |
73ea666c | 979 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 980 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 981 | list_del_rcu(&server->client_link); |
4c03ae4a | 982 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 983 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 984 | list_del(&server->master_link); |
dc030858 | 985 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
986 | |
987 | synchronize_rcu(); | |
988 | } | |
989 | ||
54ceac45 DH |
990 | /* |
991 | * Allocate and initialise a server record | |
992 | */ | |
fcf10398 | 993 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
994 | { |
995 | struct nfs_server *server; | |
996 | ||
997 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
998 | if (!server) | |
999 | return NULL; | |
1000 | ||
1001 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1002 | ||
1003 | /* Zero out the NFS state stuff */ | |
1004 | INIT_LIST_HEAD(&server->client_link); | |
1005 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1006 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1007 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1008 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1009 | |
ef818a28 SD |
1010 | atomic_set(&server->active, 0); |
1011 | ||
54ceac45 DH |
1012 | server->io_stats = nfs_alloc_iostats(); |
1013 | if (!server->io_stats) { | |
1014 | kfree(server); | |
1015 | return NULL; | |
1016 | } | |
1017 | ||
48d07649 JA |
1018 | if (bdi_init(&server->backing_dev_info)) { |
1019 | nfs_free_iostats(server->io_stats); | |
1020 | kfree(server); | |
1021 | return NULL; | |
1022 | } | |
1023 | ||
9157c31d | 1024 | ida_init(&server->openowner_id); |
d2d7ce28 | 1025 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1026 | pnfs_init_server(server); |
1027 | ||
54ceac45 DH |
1028 | return server; |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Free up a server record | |
1033 | */ | |
1034 | void nfs_free_server(struct nfs_server *server) | |
1035 | { | |
1036 | dprintk("--> nfs_free_server()\n"); | |
1037 | ||
fca5238e | 1038 | nfs_server_remove_lists(server); |
54ceac45 DH |
1039 | |
1040 | if (server->destroy != NULL) | |
1041 | server->destroy(server); | |
5cef338b TM |
1042 | |
1043 | if (!IS_ERR(server->client_acl)) | |
1044 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1045 | if (!IS_ERR(server->client)) |
1046 | rpc_shutdown_client(server->client); | |
1047 | ||
1048 | nfs_put_client(server->nfs_client); | |
1049 | ||
d2d7ce28 | 1050 | ida_destroy(&server->lockowner_id); |
9157c31d | 1051 | ida_destroy(&server->openowner_id); |
54ceac45 | 1052 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1053 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1054 | kfree(server); |
1055 | nfs_release_automount_timer(); | |
1056 | dprintk("<-- nfs_free_server()\n"); | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Create a version 2 or 3 volume record | |
1061 | * - keyed on server and FSID | |
1062 | */ | |
1179acc6 | 1063 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 1064 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
1065 | { |
1066 | struct nfs_server *server; | |
fbca779a | 1067 | struct nfs_fattr *fattr; |
54ceac45 DH |
1068 | int error; |
1069 | ||
1070 | server = nfs_alloc_server(); | |
1071 | if (!server) | |
1072 | return ERR_PTR(-ENOMEM); | |
1073 | ||
fbca779a TM |
1074 | error = -ENOMEM; |
1075 | fattr = nfs_alloc_fattr(); | |
1076 | if (fattr == NULL) | |
1077 | goto error; | |
1078 | ||
54ceac45 | 1079 | /* Get a client representation */ |
1179acc6 | 1080 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
1081 | if (error < 0) |
1082 | goto error; | |
1083 | ||
1084 | BUG_ON(!server->nfs_client); | |
1085 | BUG_ON(!server->nfs_client->rpc_ops); | |
1086 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1087 | ||
1088 | /* Probe the root fh to retrieve its FSID */ | |
1179acc6 | 1089 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1090 | if (error < 0) |
1091 | goto error; | |
54af3bb5 TM |
1092 | if (server->nfs_client->rpc_ops->version == 3) { |
1093 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1094 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 1095 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1096 | server->caps |= NFS_CAP_READDIRPLUS; |
1097 | } else { | |
1098 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1099 | server->namelen = NFS2_MAXNAMLEN; | |
1100 | } | |
1101 | ||
fbca779a | 1102 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1179acc6 | 1103 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1104 | if (error < 0) { |
1105 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1106 | goto error; | |
1107 | } | |
1108 | } | |
fbca779a | 1109 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1110 | |
6daabf1b DH |
1111 | dprintk("Server FSID: %llx:%llx\n", |
1112 | (unsigned long long) server->fsid.major, | |
1113 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1114 | |
fca5238e | 1115 | nfs_server_insert_lists(server); |
54ceac45 | 1116 | server->mount_time = jiffies; |
fbca779a | 1117 | nfs_free_fattr(fattr); |
54ceac45 DH |
1118 | return server; |
1119 | ||
1120 | error: | |
fbca779a | 1121 | nfs_free_fattr(fattr); |
54ceac45 DH |
1122 | nfs_free_server(server); |
1123 | return ERR_PTR(error); | |
1124 | } | |
1125 | ||
54ceac45 DH |
1126 | /* |
1127 | * Clone an NFS2, NFS3 or NFS4 server record | |
1128 | */ | |
1129 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1130 | struct nfs_fh *fh, | |
7e6eb683 BS |
1131 | struct nfs_fattr *fattr, |
1132 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1133 | { |
1134 | struct nfs_server *server; | |
fbca779a | 1135 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1136 | int error; |
1137 | ||
1138 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1139 | (unsigned long long) fattr->fsid.major, |
1140 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1141 | |
1142 | server = nfs_alloc_server(); | |
1143 | if (!server) | |
1144 | return ERR_PTR(-ENOMEM); | |
1145 | ||
fbca779a TM |
1146 | error = -ENOMEM; |
1147 | fattr_fsinfo = nfs_alloc_fattr(); | |
1148 | if (fattr_fsinfo == NULL) | |
1149 | goto out_free_server; | |
1150 | ||
54ceac45 DH |
1151 | /* Copy data from the source */ |
1152 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1153 | server->destroy = source->destroy; |
54ceac45 DH |
1154 | atomic_inc(&server->nfs_client->cl_count); |
1155 | nfs_server_copy_userdata(server, source); | |
1156 | ||
1157 | server->fsid = fattr->fsid; | |
1158 | ||
33170233 TM |
1159 | error = nfs_init_server_rpcclient(server, |
1160 | source->client->cl_timeout, | |
7e6eb683 | 1161 | flavor); |
54ceac45 DH |
1162 | if (error < 0) |
1163 | goto out_free_server; | |
54ceac45 DH |
1164 | |
1165 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1166 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1167 | if (error < 0) |
1168 | goto out_free_server; | |
1169 | ||
54af3bb5 TM |
1170 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1171 | server->namelen = NFS4_MAXNAMLEN; | |
1172 | ||
54ceac45 | 1173 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1174 | (unsigned long long) server->fsid.major, |
1175 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1176 | |
1177 | error = nfs_start_lockd(server); | |
1178 | if (error < 0) | |
1179 | goto out_free_server; | |
1180 | ||
fca5238e | 1181 | nfs_server_insert_lists(server); |
54ceac45 DH |
1182 | server->mount_time = jiffies; |
1183 | ||
fbca779a | 1184 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1185 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1186 | return server; | |
1187 | ||
1188 | out_free_server: | |
fbca779a | 1189 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1190 | nfs_free_server(server); |
1191 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1192 | return ERR_PTR(error); | |
1193 | } | |
6aaca566 | 1194 | |
6b13168b SK |
1195 | void nfs_clients_init(struct net *net) |
1196 | { | |
1197 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1198 | ||
1199 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1200 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
28cd1b3f SK |
1201 | #ifdef CONFIG_NFS_V4 |
1202 | idr_init(&nn->cb_ident_idr); | |
1203 | #endif | |
4c03ae4a | 1204 | spin_lock_init(&nn->nfs_client_lock); |
f092075d | 1205 | nn->boot_time = CURRENT_TIME; |
6b13168b SK |
1206 | } |
1207 | ||
6aaca566 DH |
1208 | #ifdef CONFIG_PROC_FS |
1209 | static struct proc_dir_entry *proc_fs_nfs; | |
1210 | ||
1211 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1212 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1213 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1214 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1215 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1216 | ||
88e9d34c | 1217 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1218 | .start = nfs_server_list_start, |
1219 | .next = nfs_server_list_next, | |
1220 | .stop = nfs_server_list_stop, | |
1221 | .show = nfs_server_list_show, | |
1222 | }; | |
1223 | ||
00977a59 | 1224 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1225 | .open = nfs_server_list_open, |
1226 | .read = seq_read, | |
1227 | .llseek = seq_lseek, | |
1228 | .release = seq_release, | |
34b37235 | 1229 | .owner = THIS_MODULE, |
6aaca566 DH |
1230 | }; |
1231 | ||
1232 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1233 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1234 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1235 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1236 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1237 | ||
88e9d34c | 1238 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1239 | .start = nfs_volume_list_start, |
1240 | .next = nfs_volume_list_next, | |
1241 | .stop = nfs_volume_list_stop, | |
1242 | .show = nfs_volume_list_show, | |
1243 | }; | |
1244 | ||
00977a59 | 1245 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1246 | .open = nfs_volume_list_open, |
1247 | .read = seq_read, | |
1248 | .llseek = seq_lseek, | |
1249 | .release = seq_release, | |
34b37235 | 1250 | .owner = THIS_MODULE, |
6aaca566 DH |
1251 | }; |
1252 | ||
1253 | /* | |
1254 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1255 | * we're dealing | |
1256 | */ | |
1257 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1258 | { | |
1259 | struct seq_file *m; | |
1260 | int ret; | |
6b13168b SK |
1261 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1262 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1263 | |
1264 | ret = seq_open(file, &nfs_server_list_ops); | |
1265 | if (ret < 0) | |
1266 | return ret; | |
1267 | ||
1268 | m = file->private_data; | |
6b13168b | 1269 | m->private = net; |
6aaca566 DH |
1270 | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * set up the iterator to start reading from the server list and return the first item | |
1276 | */ | |
1277 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1278 | { | |
6b13168b SK |
1279 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1280 | ||
6aaca566 | 1281 | /* lock the list against modification */ |
dc030858 | 1282 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1283 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1284 | } |
1285 | ||
1286 | /* | |
1287 | * move to next server | |
1288 | */ | |
1289 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1290 | { | |
6b13168b SK |
1291 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1292 | ||
1293 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1294 | } |
1295 | ||
1296 | /* | |
1297 | * clean up after reading from the transports list | |
1298 | */ | |
1299 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1300 | { | |
dc030858 SK |
1301 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1302 | ||
1303 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1304 | } |
1305 | ||
1306 | /* | |
1307 | * display a header line followed by a load of call lines | |
1308 | */ | |
1309 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1310 | { | |
1311 | struct nfs_client *clp; | |
6b13168b | 1312 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1313 | |
1314 | /* display header on line 1 */ | |
6b13168b | 1315 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1316 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /* display one transport per line on subsequent lines */ | |
1321 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1322 | ||
940aab49 MN |
1323 | /* Check if the client is initialized */ |
1324 | if (clp->cl_cons_state != NFS_CS_READY) | |
1325 | return 0; | |
1326 | ||
2446ab60 | 1327 | rcu_read_lock(); |
5d8515ca | 1328 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1329 | clp->rpc_ops->version, |
5d8515ca CL |
1330 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1331 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1332 | atomic_read(&clp->cl_count), |
1333 | clp->cl_hostname); | |
2446ab60 | 1334 | rcu_read_unlock(); |
6aaca566 DH |
1335 | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1341 | */ | |
1342 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1343 | { | |
1344 | struct seq_file *m; | |
1345 | int ret; | |
c25d32b2 SK |
1346 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1347 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1348 | |
1349 | ret = seq_open(file, &nfs_volume_list_ops); | |
1350 | if (ret < 0) | |
1351 | return ret; | |
1352 | ||
1353 | m = file->private_data; | |
c25d32b2 | 1354 | m->private = net; |
6aaca566 DH |
1355 | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * set up the iterator to start reading from the volume list and return the first item | |
1361 | */ | |
1362 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1363 | { | |
c25d32b2 SK |
1364 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1365 | ||
6aaca566 | 1366 | /* lock the list against modification */ |
dc030858 | 1367 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1368 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1369 | } |
1370 | ||
1371 | /* | |
1372 | * move to next volume | |
1373 | */ | |
1374 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1375 | { | |
c25d32b2 SK |
1376 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1377 | ||
1378 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1379 | } |
1380 | ||
1381 | /* | |
1382 | * clean up after reading from the transports list | |
1383 | */ | |
1384 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1385 | { | |
dc030858 SK |
1386 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1387 | ||
1388 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1389 | } |
1390 | ||
1391 | /* | |
1392 | * display a header line followed by a load of call lines | |
1393 | */ | |
1394 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1395 | { | |
1396 | struct nfs_server *server; | |
1397 | struct nfs_client *clp; | |
1398 | char dev[8], fsid[17]; | |
c25d32b2 | 1399 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1400 | |
1401 | /* display header on line 1 */ | |
c25d32b2 | 1402 | if (v == &nn->nfs_volume_list) { |
5d1acff1 | 1403 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1404 | return 0; |
1405 | } | |
1406 | /* display one transport per line on subsequent lines */ | |
1407 | server = list_entry(v, struct nfs_server, master_link); | |
1408 | clp = server->nfs_client; | |
1409 | ||
1410 | snprintf(dev, 8, "%u:%u", | |
1411 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1412 | ||
1413 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1414 | (unsigned long long) server->fsid.major, |
1415 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1416 | |
2446ab60 | 1417 | rcu_read_lock(); |
5d1acff1 | 1418 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1419 | clp->rpc_ops->version, |
5d8515ca CL |
1420 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1421 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1422 | dev, |
5d1acff1 DH |
1423 | fsid, |
1424 | nfs_server_fscache_state(server)); | |
2446ab60 | 1425 | rcu_read_unlock(); |
6aaca566 DH |
1426 | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | /* | |
1431 | * initialise the /proc/fs/nfsfs/ directory | |
1432 | */ | |
1433 | int __init nfs_fs_proc_init(void) | |
1434 | { | |
1435 | struct proc_dir_entry *p; | |
1436 | ||
36a5aeb8 | 1437 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1438 | if (!proc_fs_nfs) |
1439 | goto error_0; | |
1440 | ||
6aaca566 | 1441 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1442 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1443 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1444 | if (!p) |
1445 | goto error_1; | |
1446 | ||
6aaca566 | 1447 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1448 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1449 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1450 | if (!p) |
1451 | goto error_2; | |
6aaca566 DH |
1452 | return 0; |
1453 | ||
1454 | error_2: | |
1455 | remove_proc_entry("servers", proc_fs_nfs); | |
1456 | error_1: | |
36a5aeb8 | 1457 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1458 | error_0: |
1459 | return -ENOMEM; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * clean up the /proc/fs/nfsfs/ directory | |
1464 | */ | |
1465 | void nfs_fs_proc_exit(void) | |
1466 | { | |
1467 | remove_proc_entry("volumes", proc_fs_nfs); | |
1468 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1469 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1470 | } |
1471 | ||
1472 | #endif /* CONFIG_PROC_FS */ |