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Commit | Line | Data |
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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 | { | |
ddda8e0a | 152 | int err = init_nfs_v3(); |
ab7017a3 BS |
153 | if (err) |
154 | return err; | |
155 | ||
156 | return init_nfs_v4(); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Remove each pre-loaded NFS version | |
161 | */ | |
162 | void nfs_unregister_versions(void) | |
163 | { | |
ab7017a3 BS |
164 | exit_nfs_v3(); |
165 | exit_nfs_v4(); | |
166 | } | |
167 | ||
24c8dbbb DH |
168 | /* |
169 | * Allocate a shared client record | |
170 | * | |
171 | * Since these are allocated/deallocated very rarely, we don't | |
172 | * bother putting them in a slab cache... | |
173 | */ | |
6663ee7f | 174 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
175 | { |
176 | struct nfs_client *clp; | |
7c67db3a | 177 | struct rpc_cred *cred; |
a21bdd9b | 178 | int err = -ENOMEM; |
24c8dbbb DH |
179 | |
180 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
181 | goto error_0; | |
182 | ||
ab7017a3 BS |
183 | clp->cl_nfs_mod = cl_init->nfs_mod; |
184 | try_module_get(clp->cl_nfs_mod->owner); | |
185 | ||
186 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 187 | |
24c8dbbb DH |
188 | atomic_set(&clp->cl_count, 1); |
189 | clp->cl_cons_state = NFS_CS_INITING; | |
190 | ||
6e4cffd7 CL |
191 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
192 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 193 | |
3a498026 | 194 | if (cl_init->hostname) { |
a21bdd9b | 195 | err = -ENOMEM; |
3a498026 | 196 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 197 | if (!clp->cl_hostname) |
71468513 | 198 | goto error_cleanup; |
24c8dbbb DH |
199 | } |
200 | ||
201 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
202 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
203 | ||
59dca3b2 | 204 | clp->cl_proto = cl_init->proto; |
73ea666c | 205 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 206 | |
68c97153 | 207 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
208 | if (!IS_ERR(cred)) |
209 | clp->cl_machine_cred = cred; | |
14727281 DH |
210 | nfs_fscache_get_client_cookie(clp); |
211 | ||
24c8dbbb DH |
212 | return clp; |
213 | ||
71468513 | 214 | error_cleanup: |
ab7017a3 | 215 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
216 | kfree(clp); |
217 | error_0: | |
a21bdd9b | 218 | return ERR_PTR(err); |
24c8dbbb | 219 | } |
ddda8e0a | 220 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 221 | |
5dd3177a | 222 | #ifdef CONFIG_NFS_V4 |
f4eecd5d | 223 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ |
28cd1b3f | 224 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 225 | { |
28cd1b3f SK |
226 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
227 | ||
228 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
229 | } |
230 | ||
231 | /* nfs_client_lock held */ | |
232 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
233 | { | |
73ea666c | 234 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 235 | |
f4eecd5d | 236 | if (clp->cl_cb_ident) |
28cd1b3f | 237 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
238 | } |
239 | ||
f7e8917a FI |
240 | static void pnfs_init_server(struct nfs_server *server) |
241 | { | |
242 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
243 | } | |
244 | ||
888ef2e3 | 245 | #else |
28cd1b3f | 246 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
247 | { |
248 | } | |
249 | ||
250 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
251 | { | |
252 | } | |
f7e8917a FI |
253 | |
254 | static void pnfs_init_server(struct nfs_server *server) | |
255 | { | |
256 | } | |
257 | ||
888ef2e3 | 258 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 259 | |
24c8dbbb DH |
260 | /* |
261 | * Destroy a shared client record | |
262 | */ | |
cdb7eced | 263 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 264 | { |
40c55319 | 265 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 266 | |
14727281 DH |
267 | nfs_fscache_release_client_cookie(clp); |
268 | ||
24c8dbbb DH |
269 | /* -EIO all pending I/O */ |
270 | if (!IS_ERR(clp->cl_rpcclient)) | |
271 | rpc_shutdown_client(clp->cl_rpcclient); | |
272 | ||
7c67db3a TM |
273 | if (clp->cl_machine_cred != NULL) |
274 | put_rpccred(clp->cl_machine_cred); | |
275 | ||
73ea666c | 276 | put_net(clp->cl_net); |
ab7017a3 | 277 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
278 | kfree(clp->cl_hostname); |
279 | kfree(clp); | |
280 | ||
281 | dprintk("<-- nfs_free_client()\n"); | |
282 | } | |
ddda8e0a | 283 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
284 | |
285 | /* | |
286 | * Release a reference to a shared client record | |
287 | */ | |
288 | void nfs_put_client(struct nfs_client *clp) | |
289 | { | |
dc030858 SK |
290 | struct nfs_net *nn; |
291 | ||
27ba8512 DH |
292 | if (!clp) |
293 | return; | |
294 | ||
24c8dbbb | 295 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 296 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 297 | |
dc030858 | 298 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 299 | list_del(&clp->cl_share_link); |
f4eecd5d | 300 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 301 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb DH |
302 | |
303 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
304 | ||
cdb7eced | 305 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
306 | } |
307 | } | |
16b374ca | 308 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 309 | |
9082a5cc | 310 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
311 | /* |
312 | * Test if two ip6 socket addresses refer to the same socket by | |
313 | * comparing relevant fields. The padding bytes specifically, are not | |
314 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
315 | * and sin6_scope_id is only compared if the address is "link local" | |
316 | * because "link local" addresses need only be unique to a specific | |
317 | * link. Conversely, ordinary unicast addresses might have different | |
318 | * sin6_scope_id. | |
319 | * | |
320 | * The caller should ensure both socket addresses are AF_INET6. | |
321 | */ | |
3c8c45df CL |
322 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
323 | const struct sockaddr *sa2) | |
9f4c899c | 324 | { |
3c8c45df CL |
325 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
326 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 327 | |
b9dd3abb | 328 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 329 | return 0; |
b9dd3abb MJ |
330 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
331 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 332 | |
b9dd3abb | 333 | return 1; |
3b0d3f93 | 334 | } |
3c8c45df CL |
335 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
336 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
337 | const struct sockaddr *sa2) | |
9f4c899c TM |
338 | { |
339 | return 0; | |
340 | } | |
9082a5cc | 341 | #endif |
3b0d3f93 | 342 | |
d7371c41 ID |
343 | /* |
344 | * Test if two ip4 socket addresses refer to the same socket, by | |
345 | * comparing relevant fields. The padding bytes specifically, are | |
346 | * not compared. | |
347 | * | |
348 | * The caller should ensure both socket addresses are AF_INET. | |
349 | */ | |
3c8c45df CL |
350 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
351 | const struct sockaddr *sa2) | |
352 | { | |
353 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
354 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
355 | ||
356 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
357 | } | |
358 | ||
359 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
360 | const struct sockaddr *sa2) | |
361 | { | |
362 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
363 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
364 | ||
365 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
366 | (sin1->sin6_port == sin2->sin6_port); | |
367 | } | |
368 | ||
9f4c899c TM |
369 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
370 | const struct sockaddr *sa2) | |
d7371c41 | 371 | { |
3c8c45df CL |
372 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
373 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 374 | |
3c8c45df CL |
375 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
376 | (sin1->sin_port == sin2->sin_port); | |
377 | } | |
378 | ||
4b7c8dd2 | 379 | #if defined(CONFIG_NFS_V4_1) |
3c8c45df CL |
380 | /* |
381 | * Test if two socket addresses represent the same actual socket, | |
382 | * by comparing (only) relevant fields, excluding the port number. | |
383 | */ | |
fcf10398 BS |
384 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
385 | const struct sockaddr *sa2) | |
3c8c45df CL |
386 | { |
387 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 388 | return 0; |
3c8c45df CL |
389 | |
390 | switch (sa1->sa_family) { | |
391 | case AF_INET: | |
392 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
393 | case AF_INET6: | |
394 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
395 | } | |
396 | return 0; | |
d7371c41 | 397 | } |
4b7c8dd2 | 398 | #endif /* CONFIG_NFS_V4_1 */ |
d7371c41 | 399 | |
d7371c41 ID |
400 | /* |
401 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 402 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
403 | */ |
404 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
405 | const struct sockaddr *sa2) | |
406 | { | |
407 | if (sa1->sa_family != sa2->sa_family) | |
408 | return 0; | |
409 | ||
410 | switch (sa1->sa_family) { | |
411 | case AF_INET: | |
9f4c899c | 412 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 413 | case AF_INET6: |
9f4c899c | 414 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
415 | } |
416 | return 0; | |
417 | } | |
418 | ||
24c8dbbb | 419 | /* |
c81468a1 TM |
420 | * Find an nfs_client on the list that matches the initialisation data |
421 | * that is supplied. | |
24c8dbbb | 422 | */ |
c81468a1 | 423 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
424 | { |
425 | struct nfs_client *clp; | |
d7371c41 | 426 | const struct sockaddr *sap = data->addr; |
6b13168b | 427 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 428 | |
6b13168b | 429 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 430 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
431 | /* Don't match clients that failed to initialise properly */ |
432 | if (clp->cl_cons_state < 0) | |
433 | continue; | |
434 | ||
435 | /* Different NFS versions cannot share the same nfs_client */ | |
ab7017a3 | 436 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
437 | continue; |
438 | ||
59dca3b2 TM |
439 | if (clp->cl_proto != data->proto) |
440 | continue; | |
5aae4a9a BH |
441 | /* Match nfsv4 minorversion */ |
442 | if (clp->cl_minorversion != data->minorversion) | |
443 | continue; | |
c81468a1 | 444 | /* Match the full socket address */ |
d7371c41 | 445 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
446 | continue; |
447 | ||
448 | atomic_inc(&clp->cl_count); | |
449 | return clp; | |
13bbc06a | 450 | } |
c81468a1 | 451 | return NULL; |
24c8dbbb DH |
452 | } |
453 | ||
4697bd5e TM |
454 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
455 | { | |
456 | return clp->cl_cons_state != NFS_CS_INITING; | |
457 | } | |
458 | ||
459 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
460 | { | |
461 | return wait_event_killable(nfs_client_active_wq, | |
462 | nfs_client_init_is_complete(clp)); | |
463 | } | |
464 | ||
f411703a CL |
465 | /* |
466 | * Found an existing client. Make sure it's ready before returning. | |
467 | */ | |
468 | static struct nfs_client * | |
469 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
470 | struct nfs_client *clp) | |
471 | { | |
472 | int error; | |
473 | ||
4697bd5e | 474 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
475 | if (error < 0) { |
476 | nfs_put_client(clp); | |
477 | return ERR_PTR(-ERESTARTSYS); | |
478 | } | |
479 | ||
480 | if (clp->cl_cons_state < NFS_CS_READY) { | |
481 | error = clp->cl_cons_state; | |
482 | nfs_put_client(clp); | |
483 | return ERR_PTR(error); | |
484 | } | |
485 | ||
54ac471c TM |
486 | smp_rmb(); |
487 | ||
f411703a CL |
488 | dprintk("<-- %s found nfs_client %p for %s\n", |
489 | __func__, clp, cl_init->hostname ?: ""); | |
490 | return clp; | |
491 | } | |
492 | ||
24c8dbbb DH |
493 | /* |
494 | * Look up a client by IP address and protocol version | |
495 | * - creates a new record if one doesn't yet exist | |
496 | */ | |
fcf10398 | 497 | struct nfs_client * |
45a52a02 AA |
498 | nfs_get_client(const struct nfs_client_initdata *cl_init, |
499 | const struct rpc_timeout *timeparms, | |
500 | const char *ip_addr, | |
4bf590e0 | 501 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
502 | { |
503 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 504 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 505 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 506 | |
d7422c47 | 507 | dprintk("--> nfs_get_client(%s,v%u)\n", |
ab7017a3 | 508 | cl_init->hostname ?: "", rpc_ops->version); |
24c8dbbb DH |
509 | |
510 | /* see if the client already exists */ | |
511 | do { | |
dc030858 | 512 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 513 | |
c81468a1 | 514 | clp = nfs_match_client(cl_init); |
f411703a CL |
515 | if (clp) { |
516 | spin_unlock(&nn->nfs_client_lock); | |
517 | if (new) | |
cdb7eced | 518 | new->rpc_ops->free_client(new); |
f411703a CL |
519 | return nfs_found_client(cl_init, clp); |
520 | } | |
8cab4c39 CL |
521 | if (new) { |
522 | list_add(&new->cl_share_link, &nn->nfs_client_list); | |
523 | spin_unlock(&nn->nfs_client_lock); | |
4bf590e0 | 524 | new->cl_flags = cl_init->init_flags; |
ab7017a3 BS |
525 | return rpc_ops->init_client(new, timeparms, ip_addr, |
526 | authflavour); | |
8cab4c39 | 527 | } |
24c8dbbb | 528 | |
dc030858 | 529 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 530 | |
ab7017a3 | 531 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 532 | } while (!IS_ERR(new)); |
24c8dbbb | 533 | |
f411703a CL |
534 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
535 | cl_init->hostname ?: "", PTR_ERR(new)); | |
a21bdd9b | 536 | return new; |
24c8dbbb DH |
537 | } |
538 | ||
539 | /* | |
540 | * Mark a server as ready or failed | |
541 | */ | |
76db6d95 | 542 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 543 | { |
54ac471c | 544 | smp_wmb(); |
24c8dbbb DH |
545 | clp->cl_cons_state = state; |
546 | wake_up_all(&nfs_client_active_wq); | |
547 | } | |
5006a76c DH |
548 | |
549 | /* | |
550 | * Initialise the timeout values for a connection | |
551 | */ | |
fcf10398 | 552 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
5006a76c DH |
553 | unsigned int timeo, unsigned int retrans) |
554 | { | |
555 | to->to_initval = timeo * HZ / 10; | |
556 | to->to_retries = retrans; | |
5006a76c DH |
557 | |
558 | switch (proto) { | |
0896a725 | 559 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 560 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
561 | if (to->to_retries == 0) |
562 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 563 | if (to->to_initval == 0) |
259875ef | 564 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
565 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
566 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
567 | to->to_increment = to->to_initval; | |
568 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
569 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
570 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
571 | if (to->to_maxval < to->to_initval) | |
572 | to->to_maxval = to->to_initval; | |
5006a76c DH |
573 | to->to_exponential = 0; |
574 | break; | |
0896a725 | 575 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
576 | if (to->to_retries == 0) |
577 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 578 | if (!to->to_initval) |
259875ef | 579 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
580 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
581 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
582 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
583 | to->to_exponential = 1; | |
584 | break; | |
259875ef TM |
585 | default: |
586 | BUG(); | |
5006a76c DH |
587 | } |
588 | } | |
589 | ||
590 | /* | |
591 | * Create an RPC client handle | |
592 | */ | |
428360d7 BS |
593 | int nfs_create_rpc_client(struct nfs_client *clp, |
594 | const struct rpc_timeout *timeparms, | |
595 | rpc_authflavor_t flavor) | |
5006a76c | 596 | { |
5006a76c | 597 | struct rpc_clnt *clnt = NULL; |
41877d20 | 598 | struct rpc_create_args args = { |
73ea666c | 599 | .net = clp->cl_net, |
59dca3b2 | 600 | .protocol = clp->cl_proto, |
41877d20 | 601 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 602 | .addrsize = clp->cl_addrlen, |
33170233 | 603 | .timeout = timeparms, |
41877d20 CL |
604 | .servername = clp->cl_hostname, |
605 | .program = &nfs_program, | |
606 | .version = clp->rpc_ops->version, | |
607 | .authflavor = flavor, | |
608 | }; | |
5006a76c | 609 | |
4bf590e0 | 610 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 611 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
4bf590e0 | 612 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 CL |
613 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
614 | ||
5006a76c DH |
615 | if (!IS_ERR(clp->cl_rpcclient)) |
616 | return 0; | |
617 | ||
41877d20 | 618 | clnt = rpc_create(&args); |
5006a76c DH |
619 | if (IS_ERR(clnt)) { |
620 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 621 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
622 | return PTR_ERR(clnt); |
623 | } | |
624 | ||
5006a76c DH |
625 | clp->cl_rpcclient = clnt; |
626 | return 0; | |
627 | } | |
54ceac45 DH |
628 | |
629 | /* | |
630 | * Version 2 or 3 client destruction | |
631 | */ | |
632 | static void nfs_destroy_server(struct nfs_server *server) | |
633 | { | |
5eebde23 SJ |
634 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
635 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 636 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
637 | } |
638 | ||
639 | /* | |
640 | * Version 2 or 3 lockd setup | |
641 | */ | |
642 | static int nfs_start_lockd(struct nfs_server *server) | |
643 | { | |
9289e7f9 CL |
644 | struct nlm_host *host; |
645 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
646 | struct nlmclnt_initdata nlm_init = { |
647 | .hostname = clp->cl_hostname, | |
648 | .address = (struct sockaddr *)&clp->cl_addr, | |
649 | .addrlen = clp->cl_addrlen, | |
883bb163 | 650 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
651 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
652 | 1 : 0, | |
73ea666c | 653 | .net = clp->cl_net, |
883bb163 | 654 | }; |
54ceac45 | 655 | |
883bb163 | 656 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 657 | return 0; |
5eebde23 SJ |
658 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
659 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
660 | return 0; |
661 | ||
8a6e5deb TM |
662 | switch (clp->cl_proto) { |
663 | default: | |
664 | nlm_init.protocol = IPPROTO_TCP; | |
665 | break; | |
666 | case XPRT_TRANSPORT_UDP: | |
667 | nlm_init.protocol = IPPROTO_UDP; | |
668 | } | |
669 | ||
883bb163 | 670 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
671 | if (IS_ERR(host)) |
672 | return PTR_ERR(host); | |
673 | ||
674 | server->nlm_host = host; | |
675 | server->destroy = nfs_destroy_server; | |
676 | return 0; | |
54ceac45 DH |
677 | } |
678 | ||
54ceac45 DH |
679 | /* |
680 | * Create a general RPC client | |
681 | */ | |
fcf10398 | 682 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
683 | const struct rpc_timeout *timeo, |
684 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
685 | { |
686 | struct nfs_client *clp = server->nfs_client; | |
687 | ||
688 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
689 | if (IS_ERR(server->client)) { | |
3110ff80 | 690 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
691 | return PTR_ERR(server->client); |
692 | } | |
693 | ||
33170233 TM |
694 | memcpy(&server->client->cl_timeout_default, |
695 | timeo, | |
696 | sizeof(server->client->cl_timeout_default)); | |
697 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
698 | ||
54ceac45 DH |
699 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
700 | struct rpc_auth *auth; | |
701 | ||
702 | auth = rpcauth_create(pseudoflavour, server->client); | |
703 | if (IS_ERR(auth)) { | |
3110ff80 | 704 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
705 | return PTR_ERR(auth); |
706 | } | |
707 | } | |
708 | server->client->cl_softrtry = 0; | |
709 | if (server->flags & NFS_MOUNT_SOFT) | |
710 | server->client->cl_softrtry = 1; | |
711 | ||
54ceac45 DH |
712 | return 0; |
713 | } | |
714 | ||
8cab4c39 CL |
715 | /** |
716 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
717 | * | |
718 | * @clp: nfs_client to initialise | |
719 | * @timeparms: timeout parameters for underlying RPC transport | |
720 | * @ip_addr: IP presentation address (not used) | |
721 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
722 | * |
723 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 724 | */ |
8cab4c39 CL |
725 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
726 | const struct rpc_timeout *timeparms, | |
4bf590e0 | 727 | const char *ip_addr, rpc_authflavor_t authflavour) |
54ceac45 | 728 | { |
54ceac45 DH |
729 | int error; |
730 | ||
731 | if (clp->cl_cons_state == NFS_CS_READY) { | |
732 | /* the client is already initialised */ | |
733 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 734 | return clp; |
54ceac45 DH |
735 | } |
736 | ||
54ceac45 DH |
737 | /* |
738 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
739 | * - RFC 2623, sec 2.3.2 | |
740 | */ | |
4bf590e0 | 741 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
742 | if (error < 0) |
743 | goto error; | |
744 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 745 | return clp; |
54ceac45 DH |
746 | |
747 | error: | |
748 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 749 | nfs_put_client(clp); |
54ceac45 | 750 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 751 | return ERR_PTR(error); |
54ceac45 | 752 | } |
ddda8e0a | 753 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
754 | |
755 | /* | |
756 | * Create a version 2 or 3 client | |
757 | */ | |
2283f8d6 | 758 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
759 | const struct nfs_parsed_mount_data *data, |
760 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 761 | { |
3a498026 TM |
762 | struct nfs_client_initdata cl_init = { |
763 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 764 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 765 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 766 | .nfs_mod = nfs_mod, |
59dca3b2 | 767 | .proto = data->nfs_server.protocol, |
e50a7a1a | 768 | .net = data->net, |
3a498026 | 769 | }; |
33170233 | 770 | struct rpc_timeout timeparms; |
54ceac45 | 771 | struct nfs_client *clp; |
3a498026 | 772 | int error; |
54ceac45 DH |
773 | |
774 | dprintk("--> nfs_init_server()\n"); | |
775 | ||
45a52a02 AA |
776 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
777 | data->timeo, data->retrans); | |
4bf590e0 CL |
778 | if (data->flags & NFS_MOUNT_NORESVPORT) |
779 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 780 | |
54ceac45 | 781 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 782 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
783 | if (IS_ERR(clp)) { |
784 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
785 | return PTR_ERR(clp); | |
786 | } | |
787 | ||
54ceac45 DH |
788 | server->nfs_client = clp; |
789 | ||
790 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 791 | server->flags = data->flags; |
b797cac7 | 792 | server->options = data->options; |
62ab460c TM |
793 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
794 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
3a1556e8 | 795 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; |
54ceac45 DH |
796 | |
797 | if (data->rsize) | |
798 | server->rsize = nfs_block_size(data->rsize, NULL); | |
799 | if (data->wsize) | |
800 | server->wsize = nfs_block_size(data->wsize, NULL); | |
801 | ||
802 | server->acregmin = data->acregmin * HZ; | |
803 | server->acregmax = data->acregmax * HZ; | |
804 | server->acdirmin = data->acdirmin * HZ; | |
805 | server->acdirmax = data->acdirmax * HZ; | |
806 | ||
807 | /* Start lockd here, before we might error out */ | |
808 | error = nfs_start_lockd(server); | |
809 | if (error < 0) | |
810 | goto error; | |
811 | ||
f22d6d79 CL |
812 | server->port = data->nfs_server.port; |
813 | ||
33170233 | 814 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
815 | if (error < 0) |
816 | goto error; | |
817 | ||
3f8400d1 CL |
818 | /* Preserve the values of mount_server-related mount options */ |
819 | if (data->mount_server.addrlen) { | |
820 | memcpy(&server->mountd_address, &data->mount_server.address, | |
821 | data->mount_server.addrlen); | |
822 | server->mountd_addrlen = data->mount_server.addrlen; | |
823 | } | |
824 | server->mountd_version = data->mount_server.version; | |
825 | server->mountd_port = data->mount_server.port; | |
826 | server->mountd_protocol = data->mount_server.protocol; | |
827 | ||
54ceac45 | 828 | server->namelen = data->namlen; |
54ceac45 DH |
829 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
830 | return 0; | |
831 | ||
832 | error: | |
833 | server->nfs_client = NULL; | |
834 | nfs_put_client(clp); | |
835 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
836 | return error; | |
837 | } | |
838 | ||
839 | /* | |
840 | * Load up the server record from information gained in an fsinfo record | |
841 | */ | |
738fd0f3 BH |
842 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
843 | struct nfs_fh *mntfh, | |
844 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
845 | { |
846 | unsigned long max_rpc_payload; | |
847 | ||
848 | /* Work out a lot of parameters */ | |
849 | if (server->rsize == 0) | |
850 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
851 | if (server->wsize == 0) | |
852 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
853 | ||
854 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
855 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
856 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
857 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
858 | ||
859 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
860 | if (server->rsize > max_rpc_payload) | |
861 | server->rsize = max_rpc_payload; | |
862 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
863 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
864 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 865 | |
d993831f | 866 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
867 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
868 | ||
869 | if (server->wsize > max_rpc_payload) | |
870 | server->wsize = max_rpc_payload; | |
871 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
872 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
873 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 874 | server->pnfs_blksize = fsinfo->blksize; |
85e174ba | 875 | |
54ceac45 DH |
876 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
877 | ||
878 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
879 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
880 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
881 | if (server->dtsize > server->rsize) |
882 | server->dtsize = server->rsize; | |
883 | ||
884 | if (server->flags & NFS_MOUNT_NOAC) { | |
885 | server->acregmin = server->acregmax = 0; | |
886 | server->acdirmin = server->acdirmax = 0; | |
887 | } | |
888 | ||
889 | server->maxfilesize = fsinfo->maxfilesize; | |
890 | ||
6b96724e RL |
891 | server->time_delta = fsinfo->time_delta; |
892 | ||
54ceac45 DH |
893 | /* We're airborne Set socket buffersize */ |
894 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
895 | } | |
896 | ||
897 | /* | |
898 | * Probe filesystem information, including the FSID on v2/v3 | |
899 | */ | |
fcf10398 | 900 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
901 | { |
902 | struct nfs_fsinfo fsinfo; | |
903 | struct nfs_client *clp = server->nfs_client; | |
904 | int error; | |
905 | ||
906 | dprintk("--> nfs_probe_fsinfo()\n"); | |
907 | ||
908 | if (clp->rpc_ops->set_capabilities != NULL) { | |
909 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
910 | if (error < 0) | |
911 | goto out_error; | |
912 | } | |
913 | ||
914 | fsinfo.fattr = fattr; | |
85e174ba | 915 | fsinfo.layouttype = 0; |
54ceac45 DH |
916 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
917 | if (error < 0) | |
918 | goto out_error; | |
919 | ||
738fd0f3 | 920 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
921 | |
922 | /* Get some general file system info */ | |
923 | if (server->namelen == 0) { | |
924 | struct nfs_pathconf pathinfo; | |
925 | ||
926 | pathinfo.fattr = fattr; | |
927 | nfs_fattr_init(fattr); | |
928 | ||
929 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
930 | server->namelen = pathinfo.max_namelen; | |
931 | } | |
932 | ||
933 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
934 | return 0; | |
935 | ||
936 | out_error: | |
937 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
938 | return error; | |
939 | } | |
940 | ||
941 | /* | |
942 | * Copy useful information when duplicating a server record | |
943 | */ | |
fcf10398 | 944 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
945 | { |
946 | target->flags = source->flags; | |
356e76b8 CL |
947 | target->rsize = source->rsize; |
948 | target->wsize = source->wsize; | |
54ceac45 DH |
949 | target->acregmin = source->acregmin; |
950 | target->acregmax = source->acregmax; | |
951 | target->acdirmin = source->acdirmin; | |
952 | target->acdirmax = source->acdirmax; | |
953 | target->caps = source->caps; | |
2df54806 | 954 | target->options = source->options; |
54ceac45 DH |
955 | } |
956 | ||
fcf10398 | 957 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
958 | { |
959 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 960 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 961 | |
dc030858 | 962 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 963 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 964 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 965 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 966 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
967 | |
968 | } | |
969 | ||
970 | static void nfs_server_remove_lists(struct nfs_server *server) | |
971 | { | |
d3b4c9d7 | 972 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 973 | struct nfs_net *nn; |
d3b4c9d7 | 974 | |
4c03ae4a TM |
975 | if (clp == NULL) |
976 | return; | |
73ea666c | 977 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 978 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 979 | list_del_rcu(&server->client_link); |
4c03ae4a | 980 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 981 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 982 | list_del(&server->master_link); |
dc030858 | 983 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
984 | |
985 | synchronize_rcu(); | |
986 | } | |
987 | ||
54ceac45 DH |
988 | /* |
989 | * Allocate and initialise a server record | |
990 | */ | |
fcf10398 | 991 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
992 | { |
993 | struct nfs_server *server; | |
994 | ||
995 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
996 | if (!server) | |
997 | return NULL; | |
998 | ||
999 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1000 | ||
1001 | /* Zero out the NFS state stuff */ | |
1002 | INIT_LIST_HEAD(&server->client_link); | |
1003 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1004 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1005 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1006 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1007 | |
ef818a28 SD |
1008 | atomic_set(&server->active, 0); |
1009 | ||
54ceac45 DH |
1010 | server->io_stats = nfs_alloc_iostats(); |
1011 | if (!server->io_stats) { | |
1012 | kfree(server); | |
1013 | return NULL; | |
1014 | } | |
1015 | ||
48d07649 JA |
1016 | if (bdi_init(&server->backing_dev_info)) { |
1017 | nfs_free_iostats(server->io_stats); | |
1018 | kfree(server); | |
1019 | return NULL; | |
1020 | } | |
1021 | ||
9157c31d | 1022 | ida_init(&server->openowner_id); |
d2d7ce28 | 1023 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1024 | pnfs_init_server(server); |
1025 | ||
54ceac45 DH |
1026 | return server; |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Free up a server record | |
1031 | */ | |
1032 | void nfs_free_server(struct nfs_server *server) | |
1033 | { | |
1034 | dprintk("--> nfs_free_server()\n"); | |
1035 | ||
fca5238e | 1036 | nfs_server_remove_lists(server); |
54ceac45 DH |
1037 | |
1038 | if (server->destroy != NULL) | |
1039 | server->destroy(server); | |
5cef338b TM |
1040 | |
1041 | if (!IS_ERR(server->client_acl)) | |
1042 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1043 | if (!IS_ERR(server->client)) |
1044 | rpc_shutdown_client(server->client); | |
1045 | ||
1046 | nfs_put_client(server->nfs_client); | |
1047 | ||
d2d7ce28 | 1048 | ida_destroy(&server->lockowner_id); |
9157c31d | 1049 | ida_destroy(&server->openowner_id); |
54ceac45 | 1050 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1051 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1052 | kfree(server); |
1053 | nfs_release_automount_timer(); | |
1054 | dprintk("<-- nfs_free_server()\n"); | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * Create a version 2 or 3 volume record | |
1059 | * - keyed on server and FSID | |
1060 | */ | |
1179acc6 | 1061 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 1062 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
1063 | { |
1064 | struct nfs_server *server; | |
fbca779a | 1065 | struct nfs_fattr *fattr; |
54ceac45 DH |
1066 | int error; |
1067 | ||
1068 | server = nfs_alloc_server(); | |
1069 | if (!server) | |
1070 | return ERR_PTR(-ENOMEM); | |
1071 | ||
fbca779a TM |
1072 | error = -ENOMEM; |
1073 | fattr = nfs_alloc_fattr(); | |
1074 | if (fattr == NULL) | |
1075 | goto error; | |
1076 | ||
54ceac45 | 1077 | /* Get a client representation */ |
1179acc6 | 1078 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
1079 | if (error < 0) |
1080 | goto error; | |
1081 | ||
1082 | BUG_ON(!server->nfs_client); | |
1083 | BUG_ON(!server->nfs_client->rpc_ops); | |
1084 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1085 | ||
1086 | /* Probe the root fh to retrieve its FSID */ | |
1179acc6 | 1087 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1088 | if (error < 0) |
1089 | goto error; | |
54af3bb5 TM |
1090 | if (server->nfs_client->rpc_ops->version == 3) { |
1091 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1092 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 1093 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1094 | server->caps |= NFS_CAP_READDIRPLUS; |
1095 | } else { | |
1096 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1097 | server->namelen = NFS2_MAXNAMLEN; | |
1098 | } | |
1099 | ||
fbca779a | 1100 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1179acc6 | 1101 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1102 | if (error < 0) { |
1103 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1104 | goto error; | |
1105 | } | |
1106 | } | |
fbca779a | 1107 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1108 | |
6daabf1b DH |
1109 | dprintk("Server FSID: %llx:%llx\n", |
1110 | (unsigned long long) server->fsid.major, | |
1111 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1112 | |
fca5238e | 1113 | nfs_server_insert_lists(server); |
54ceac45 | 1114 | server->mount_time = jiffies; |
fbca779a | 1115 | nfs_free_fattr(fattr); |
54ceac45 DH |
1116 | return server; |
1117 | ||
1118 | error: | |
fbca779a | 1119 | nfs_free_fattr(fattr); |
54ceac45 DH |
1120 | nfs_free_server(server); |
1121 | return ERR_PTR(error); | |
1122 | } | |
ddda8e0a | 1123 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1124 | |
54ceac45 DH |
1125 | /* |
1126 | * Clone an NFS2, NFS3 or NFS4 server record | |
1127 | */ | |
1128 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1129 | struct nfs_fh *fh, | |
7e6eb683 BS |
1130 | struct nfs_fattr *fattr, |
1131 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1132 | { |
1133 | struct nfs_server *server; | |
fbca779a | 1134 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1135 | int error; |
1136 | ||
1137 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1138 | (unsigned long long) fattr->fsid.major, |
1139 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1140 | |
1141 | server = nfs_alloc_server(); | |
1142 | if (!server) | |
1143 | return ERR_PTR(-ENOMEM); | |
1144 | ||
fbca779a TM |
1145 | error = -ENOMEM; |
1146 | fattr_fsinfo = nfs_alloc_fattr(); | |
1147 | if (fattr_fsinfo == NULL) | |
1148 | goto out_free_server; | |
1149 | ||
54ceac45 DH |
1150 | /* Copy data from the source */ |
1151 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1152 | server->destroy = source->destroy; |
54ceac45 DH |
1153 | atomic_inc(&server->nfs_client->cl_count); |
1154 | nfs_server_copy_userdata(server, source); | |
1155 | ||
1156 | server->fsid = fattr->fsid; | |
1157 | ||
33170233 TM |
1158 | error = nfs_init_server_rpcclient(server, |
1159 | source->client->cl_timeout, | |
7e6eb683 | 1160 | flavor); |
54ceac45 DH |
1161 | if (error < 0) |
1162 | goto out_free_server; | |
54ceac45 DH |
1163 | |
1164 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1165 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1166 | if (error < 0) |
1167 | goto out_free_server; | |
1168 | ||
54af3bb5 TM |
1169 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1170 | server->namelen = NFS4_MAXNAMLEN; | |
1171 | ||
54ceac45 | 1172 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1173 | (unsigned long long) server->fsid.major, |
1174 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1175 | |
1176 | error = nfs_start_lockd(server); | |
1177 | if (error < 0) | |
1178 | goto out_free_server; | |
1179 | ||
fca5238e | 1180 | nfs_server_insert_lists(server); |
54ceac45 DH |
1181 | server->mount_time = jiffies; |
1182 | ||
fbca779a | 1183 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1184 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1185 | return server; | |
1186 | ||
1187 | out_free_server: | |
fbca779a | 1188 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1189 | nfs_free_server(server); |
1190 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1191 | return ERR_PTR(error); | |
1192 | } | |
ddda8e0a | 1193 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
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 */ |