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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 | } | |
ee34e136 | 96 | } |
ab7017a3 BS |
97 | |
98 | spin_unlock(&nfs_version_lock); | |
ee34e136 | 99 | return ERR_PTR(-EPROTONOSUPPORT); |
ab7017a3 BS |
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); | |
1ae811ee | 108 | request_module("nfsv%d", version); |
ab7017a3 BS |
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 | ||
24c8dbbb DH |
145 | /* |
146 | * Allocate a shared client record | |
147 | * | |
148 | * Since these are allocated/deallocated very rarely, we don't | |
149 | * bother putting them in a slab cache... | |
150 | */ | |
6663ee7f | 151 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
152 | { |
153 | struct nfs_client *clp; | |
7c67db3a | 154 | struct rpc_cred *cred; |
a21bdd9b | 155 | int err = -ENOMEM; |
24c8dbbb DH |
156 | |
157 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
158 | goto error_0; | |
159 | ||
ab7017a3 BS |
160 | clp->cl_nfs_mod = cl_init->nfs_mod; |
161 | try_module_get(clp->cl_nfs_mod->owner); | |
162 | ||
163 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 164 | |
24c8dbbb DH |
165 | atomic_set(&clp->cl_count, 1); |
166 | clp->cl_cons_state = NFS_CS_INITING; | |
167 | ||
6e4cffd7 CL |
168 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
169 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 170 | |
3a498026 | 171 | if (cl_init->hostname) { |
a21bdd9b | 172 | err = -ENOMEM; |
3a498026 | 173 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 174 | if (!clp->cl_hostname) |
71468513 | 175 | goto error_cleanup; |
24c8dbbb DH |
176 | } |
177 | ||
178 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
179 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
180 | ||
59dca3b2 | 181 | clp->cl_proto = cl_init->proto; |
73ea666c | 182 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 183 | |
68c97153 | 184 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
185 | if (!IS_ERR(cred)) |
186 | clp->cl_machine_cred = cred; | |
14727281 DH |
187 | nfs_fscache_get_client_cookie(clp); |
188 | ||
24c8dbbb DH |
189 | return clp; |
190 | ||
71468513 | 191 | error_cleanup: |
ab7017a3 | 192 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
193 | kfree(clp); |
194 | error_0: | |
a21bdd9b | 195 | return ERR_PTR(err); |
24c8dbbb | 196 | } |
ddda8e0a | 197 | EXPORT_SYMBOL_GPL(nfs_alloc_client); |
24c8dbbb | 198 | |
89d77c8f | 199 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f | 200 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 201 | { |
28cd1b3f SK |
202 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
203 | ||
204 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
205 | } |
206 | ||
207 | /* nfs_client_lock held */ | |
208 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
209 | { | |
73ea666c | 210 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 211 | |
f4eecd5d | 212 | if (clp->cl_cb_ident) |
28cd1b3f | 213 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
214 | } |
215 | ||
f7e8917a FI |
216 | static void pnfs_init_server(struct nfs_server *server) |
217 | { | |
218 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
219 | } | |
220 | ||
888ef2e3 | 221 | #else |
28cd1b3f | 222 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
223 | { |
224 | } | |
225 | ||
226 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
227 | { | |
228 | } | |
f7e8917a FI |
229 | |
230 | static void pnfs_init_server(struct nfs_server *server) | |
231 | { | |
232 | } | |
233 | ||
888ef2e3 | 234 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 235 | |
24c8dbbb DH |
236 | /* |
237 | * Destroy a shared client record | |
238 | */ | |
cdb7eced | 239 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 240 | { |
40c55319 | 241 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 242 | |
14727281 DH |
243 | nfs_fscache_release_client_cookie(clp); |
244 | ||
24c8dbbb DH |
245 | /* -EIO all pending I/O */ |
246 | if (!IS_ERR(clp->cl_rpcclient)) | |
247 | rpc_shutdown_client(clp->cl_rpcclient); | |
248 | ||
7c67db3a TM |
249 | if (clp->cl_machine_cred != NULL) |
250 | put_rpccred(clp->cl_machine_cred); | |
251 | ||
73ea666c | 252 | put_net(clp->cl_net); |
ab7017a3 | 253 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
254 | kfree(clp->cl_hostname); |
255 | kfree(clp); | |
256 | ||
257 | dprintk("<-- nfs_free_client()\n"); | |
258 | } | |
ddda8e0a | 259 | EXPORT_SYMBOL_GPL(nfs_free_client); |
24c8dbbb DH |
260 | |
261 | /* | |
262 | * Release a reference to a shared client record | |
263 | */ | |
264 | void nfs_put_client(struct nfs_client *clp) | |
265 | { | |
dc030858 SK |
266 | struct nfs_net *nn; |
267 | ||
27ba8512 DH |
268 | if (!clp) |
269 | return; | |
270 | ||
24c8dbbb | 271 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 272 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 273 | |
dc030858 | 274 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 275 | list_del(&clp->cl_share_link); |
f4eecd5d | 276 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 277 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 278 | |
1fea73a8 | 279 | WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); |
24c8dbbb | 280 | |
cdb7eced | 281 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
282 | } |
283 | } | |
16b374ca | 284 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 285 | |
9082a5cc | 286 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
287 | /* |
288 | * Test if two ip6 socket addresses refer to the same socket by | |
289 | * comparing relevant fields. The padding bytes specifically, are not | |
290 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
291 | * and sin6_scope_id is only compared if the address is "link local" | |
292 | * because "link local" addresses need only be unique to a specific | |
293 | * link. Conversely, ordinary unicast addresses might have different | |
294 | * sin6_scope_id. | |
295 | * | |
296 | * The caller should ensure both socket addresses are AF_INET6. | |
297 | */ | |
3c8c45df CL |
298 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
299 | const struct sockaddr *sa2) | |
9f4c899c | 300 | { |
3c8c45df CL |
301 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
302 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 303 | |
b9dd3abb | 304 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 305 | return 0; |
b9dd3abb MJ |
306 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
307 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 308 | |
b9dd3abb | 309 | return 1; |
3b0d3f93 | 310 | } |
3c8c45df CL |
311 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
312 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
313 | const struct sockaddr *sa2) | |
9f4c899c TM |
314 | { |
315 | return 0; | |
316 | } | |
9082a5cc | 317 | #endif |
3b0d3f93 | 318 | |
d7371c41 ID |
319 | /* |
320 | * Test if two ip4 socket addresses refer to the same socket, by | |
321 | * comparing relevant fields. The padding bytes specifically, are | |
322 | * not compared. | |
323 | * | |
324 | * The caller should ensure both socket addresses are AF_INET. | |
325 | */ | |
3c8c45df CL |
326 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
327 | const struct sockaddr *sa2) | |
328 | { | |
329 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
330 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
331 | ||
332 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
333 | } | |
334 | ||
335 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
336 | const struct sockaddr *sa2) | |
337 | { | |
338 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
339 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
340 | ||
341 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
342 | (sin1->sin6_port == sin2->sin6_port); | |
343 | } | |
344 | ||
9f4c899c TM |
345 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
346 | const struct sockaddr *sa2) | |
d7371c41 | 347 | { |
3c8c45df CL |
348 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
349 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 350 | |
3c8c45df CL |
351 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
352 | (sin1->sin_port == sin2->sin_port); | |
353 | } | |
354 | ||
4b7c8dd2 | 355 | #if defined(CONFIG_NFS_V4_1) |
3c8c45df CL |
356 | /* |
357 | * Test if two socket addresses represent the same actual socket, | |
358 | * by comparing (only) relevant fields, excluding the port number. | |
359 | */ | |
fcf10398 BS |
360 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
361 | const struct sockaddr *sa2) | |
3c8c45df CL |
362 | { |
363 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 364 | return 0; |
3c8c45df CL |
365 | |
366 | switch (sa1->sa_family) { | |
367 | case AF_INET: | |
368 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
369 | case AF_INET6: | |
370 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
371 | } | |
372 | return 0; | |
d7371c41 | 373 | } |
89d77c8f | 374 | EXPORT_SYMBOL_GPL(nfs_sockaddr_match_ipaddr); |
4b7c8dd2 | 375 | #endif /* CONFIG_NFS_V4_1 */ |
d7371c41 | 376 | |
d7371c41 ID |
377 | /* |
378 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 379 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
380 | */ |
381 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
382 | const struct sockaddr *sa2) | |
383 | { | |
384 | if (sa1->sa_family != sa2->sa_family) | |
385 | return 0; | |
386 | ||
387 | switch (sa1->sa_family) { | |
388 | case AF_INET: | |
9f4c899c | 389 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 390 | case AF_INET6: |
9f4c899c | 391 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
392 | } |
393 | return 0; | |
394 | } | |
395 | ||
24c8dbbb | 396 | /* |
c81468a1 TM |
397 | * Find an nfs_client on the list that matches the initialisation data |
398 | * that is supplied. | |
24c8dbbb | 399 | */ |
c81468a1 | 400 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
401 | { |
402 | struct nfs_client *clp; | |
d7371c41 | 403 | const struct sockaddr *sap = data->addr; |
6b13168b | 404 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 405 | |
6b13168b | 406 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 407 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
408 | /* Don't match clients that failed to initialise properly */ |
409 | if (clp->cl_cons_state < 0) | |
410 | continue; | |
411 | ||
412 | /* Different NFS versions cannot share the same nfs_client */ | |
ab7017a3 | 413 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
414 | continue; |
415 | ||
59dca3b2 TM |
416 | if (clp->cl_proto != data->proto) |
417 | continue; | |
5aae4a9a BH |
418 | /* Match nfsv4 minorversion */ |
419 | if (clp->cl_minorversion != data->minorversion) | |
420 | continue; | |
c81468a1 | 421 | /* Match the full socket address */ |
d7371c41 | 422 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
423 | continue; |
424 | ||
425 | atomic_inc(&clp->cl_count); | |
426 | return clp; | |
13bbc06a | 427 | } |
c81468a1 | 428 | return NULL; |
24c8dbbb DH |
429 | } |
430 | ||
4697bd5e TM |
431 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
432 | { | |
433 | return clp->cl_cons_state != NFS_CS_INITING; | |
434 | } | |
435 | ||
436 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
437 | { | |
438 | return wait_event_killable(nfs_client_active_wq, | |
439 | nfs_client_init_is_complete(clp)); | |
440 | } | |
89d77c8f | 441 | EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete); |
4697bd5e | 442 | |
f411703a CL |
443 | /* |
444 | * Found an existing client. Make sure it's ready before returning. | |
445 | */ | |
446 | static struct nfs_client * | |
447 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
448 | struct nfs_client *clp) | |
449 | { | |
450 | int error; | |
451 | ||
4697bd5e | 452 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
453 | if (error < 0) { |
454 | nfs_put_client(clp); | |
455 | return ERR_PTR(-ERESTARTSYS); | |
456 | } | |
457 | ||
458 | if (clp->cl_cons_state < NFS_CS_READY) { | |
459 | error = clp->cl_cons_state; | |
460 | nfs_put_client(clp); | |
461 | return ERR_PTR(error); | |
462 | } | |
463 | ||
54ac471c TM |
464 | smp_rmb(); |
465 | ||
f411703a CL |
466 | dprintk("<-- %s found nfs_client %p for %s\n", |
467 | __func__, clp, cl_init->hostname ?: ""); | |
468 | return clp; | |
469 | } | |
470 | ||
24c8dbbb DH |
471 | /* |
472 | * Look up a client by IP address and protocol version | |
473 | * - creates a new record if one doesn't yet exist | |
474 | */ | |
fcf10398 | 475 | struct nfs_client * |
45a52a02 AA |
476 | nfs_get_client(const struct nfs_client_initdata *cl_init, |
477 | const struct rpc_timeout *timeparms, | |
478 | const char *ip_addr, | |
4bf590e0 | 479 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
480 | { |
481 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 482 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 483 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 484 | |
d7422c47 | 485 | dprintk("--> nfs_get_client(%s,v%u)\n", |
ab7017a3 | 486 | cl_init->hostname ?: "", rpc_ops->version); |
24c8dbbb DH |
487 | |
488 | /* see if the client already exists */ | |
489 | do { | |
dc030858 | 490 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 491 | |
c81468a1 | 492 | clp = nfs_match_client(cl_init); |
f411703a CL |
493 | if (clp) { |
494 | spin_unlock(&nn->nfs_client_lock); | |
495 | if (new) | |
cdb7eced | 496 | new->rpc_ops->free_client(new); |
f411703a CL |
497 | return nfs_found_client(cl_init, clp); |
498 | } | |
8cab4c39 | 499 | if (new) { |
05f4c350 CL |
500 | list_add_tail(&new->cl_share_link, |
501 | &nn->nfs_client_list); | |
8cab4c39 | 502 | spin_unlock(&nn->nfs_client_lock); |
4bf590e0 | 503 | new->cl_flags = cl_init->init_flags; |
ab7017a3 BS |
504 | return rpc_ops->init_client(new, timeparms, ip_addr, |
505 | authflavour); | |
8cab4c39 | 506 | } |
24c8dbbb | 507 | |
dc030858 | 508 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 509 | |
ab7017a3 | 510 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 511 | } while (!IS_ERR(new)); |
24c8dbbb | 512 | |
f411703a CL |
513 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
514 | cl_init->hostname ?: "", PTR_ERR(new)); | |
a21bdd9b | 515 | return new; |
24c8dbbb | 516 | } |
89d77c8f | 517 | EXPORT_SYMBOL_GPL(nfs_get_client); |
24c8dbbb DH |
518 | |
519 | /* | |
520 | * Mark a server as ready or failed | |
521 | */ | |
76db6d95 | 522 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 523 | { |
54ac471c | 524 | smp_wmb(); |
24c8dbbb DH |
525 | clp->cl_cons_state = state; |
526 | wake_up_all(&nfs_client_active_wq); | |
527 | } | |
89d77c8f | 528 | EXPORT_SYMBOL_GPL(nfs_mark_client_ready); |
5006a76c DH |
529 | |
530 | /* | |
531 | * Initialise the timeout values for a connection | |
532 | */ | |
fcf10398 | 533 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
5006a76c DH |
534 | unsigned int timeo, unsigned int retrans) |
535 | { | |
536 | to->to_initval = timeo * HZ / 10; | |
537 | to->to_retries = retrans; | |
5006a76c DH |
538 | |
539 | switch (proto) { | |
0896a725 | 540 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 541 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
542 | if (to->to_retries == 0) |
543 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 544 | if (to->to_initval == 0) |
259875ef | 545 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
546 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
547 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
548 | to->to_increment = to->to_initval; | |
549 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
550 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
551 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
552 | if (to->to_maxval < to->to_initval) | |
553 | to->to_maxval = to->to_initval; | |
5006a76c DH |
554 | to->to_exponential = 0; |
555 | break; | |
0896a725 | 556 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
557 | if (to->to_retries == 0) |
558 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 559 | if (!to->to_initval) |
259875ef | 560 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
561 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
562 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
563 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
564 | to->to_exponential = 1; | |
565 | break; | |
259875ef TM |
566 | default: |
567 | BUG(); | |
5006a76c DH |
568 | } |
569 | } | |
89d77c8f | 570 | EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
5006a76c DH |
571 | |
572 | /* | |
573 | * Create an RPC client handle | |
574 | */ | |
428360d7 BS |
575 | int nfs_create_rpc_client(struct nfs_client *clp, |
576 | const struct rpc_timeout *timeparms, | |
577 | rpc_authflavor_t flavor) | |
5006a76c | 578 | { |
5006a76c | 579 | struct rpc_clnt *clnt = NULL; |
41877d20 | 580 | struct rpc_create_args args = { |
73ea666c | 581 | .net = clp->cl_net, |
59dca3b2 | 582 | .protocol = clp->cl_proto, |
41877d20 | 583 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 584 | .addrsize = clp->cl_addrlen, |
33170233 | 585 | .timeout = timeparms, |
41877d20 CL |
586 | .servername = clp->cl_hostname, |
587 | .program = &nfs_program, | |
588 | .version = clp->rpc_ops->version, | |
589 | .authflavor = flavor, | |
590 | }; | |
5006a76c | 591 | |
4bf590e0 | 592 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 593 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
4bf590e0 | 594 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 CL |
595 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
596 | ||
5006a76c DH |
597 | if (!IS_ERR(clp->cl_rpcclient)) |
598 | return 0; | |
599 | ||
41877d20 | 600 | clnt = rpc_create(&args); |
5006a76c DH |
601 | if (IS_ERR(clnt)) { |
602 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 603 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
604 | return PTR_ERR(clnt); |
605 | } | |
606 | ||
5006a76c DH |
607 | clp->cl_rpcclient = clnt; |
608 | return 0; | |
609 | } | |
89d77c8f | 610 | EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
54ceac45 DH |
611 | |
612 | /* | |
613 | * Version 2 or 3 client destruction | |
614 | */ | |
615 | static void nfs_destroy_server(struct nfs_server *server) | |
616 | { | |
f259613a | 617 | if (server->nlm_host) |
9289e7f9 | 618 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
619 | } |
620 | ||
621 | /* | |
622 | * Version 2 or 3 lockd setup | |
623 | */ | |
624 | static int nfs_start_lockd(struct nfs_server *server) | |
625 | { | |
9289e7f9 CL |
626 | struct nlm_host *host; |
627 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
628 | struct nlmclnt_initdata nlm_init = { |
629 | .hostname = clp->cl_hostname, | |
630 | .address = (struct sockaddr *)&clp->cl_addr, | |
631 | .addrlen = clp->cl_addrlen, | |
883bb163 | 632 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
633 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
634 | 1 : 0, | |
73ea666c | 635 | .net = clp->cl_net, |
883bb163 | 636 | }; |
54ceac45 | 637 | |
883bb163 | 638 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 639 | return 0; |
5eebde23 SJ |
640 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
641 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
642 | return 0; |
643 | ||
8a6e5deb TM |
644 | switch (clp->cl_proto) { |
645 | default: | |
646 | nlm_init.protocol = IPPROTO_TCP; | |
647 | break; | |
648 | case XPRT_TRANSPORT_UDP: | |
649 | nlm_init.protocol = IPPROTO_UDP; | |
650 | } | |
651 | ||
883bb163 | 652 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
653 | if (IS_ERR(host)) |
654 | return PTR_ERR(host); | |
655 | ||
656 | server->nlm_host = host; | |
657 | server->destroy = nfs_destroy_server; | |
658 | return 0; | |
54ceac45 DH |
659 | } |
660 | ||
54ceac45 DH |
661 | /* |
662 | * Create a general RPC client | |
663 | */ | |
fcf10398 | 664 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
665 | const struct rpc_timeout *timeo, |
666 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
667 | { |
668 | struct nfs_client *clp = server->nfs_client; | |
669 | ||
ba9b584c CL |
670 | server->client = rpc_clone_client_set_auth(clp->cl_rpcclient, |
671 | pseudoflavour); | |
54ceac45 | 672 | if (IS_ERR(server->client)) { |
3110ff80 | 673 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
674 | return PTR_ERR(server->client); |
675 | } | |
676 | ||
33170233 TM |
677 | memcpy(&server->client->cl_timeout_default, |
678 | timeo, | |
679 | sizeof(server->client->cl_timeout_default)); | |
680 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
54ceac45 DH |
681 | server->client->cl_softrtry = 0; |
682 | if (server->flags & NFS_MOUNT_SOFT) | |
683 | server->client->cl_softrtry = 1; | |
684 | ||
54ceac45 DH |
685 | return 0; |
686 | } | |
89d77c8f | 687 | EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient); |
54ceac45 | 688 | |
8cab4c39 CL |
689 | /** |
690 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
691 | * | |
692 | * @clp: nfs_client to initialise | |
693 | * @timeparms: timeout parameters for underlying RPC transport | |
694 | * @ip_addr: IP presentation address (not used) | |
695 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
696 | * |
697 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 698 | */ |
8cab4c39 CL |
699 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
700 | const struct rpc_timeout *timeparms, | |
4bf590e0 | 701 | const char *ip_addr, rpc_authflavor_t authflavour) |
54ceac45 | 702 | { |
54ceac45 DH |
703 | int error; |
704 | ||
705 | if (clp->cl_cons_state == NFS_CS_READY) { | |
706 | /* the client is already initialised */ | |
707 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 708 | return clp; |
54ceac45 DH |
709 | } |
710 | ||
54ceac45 DH |
711 | /* |
712 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
713 | * - RFC 2623, sec 2.3.2 | |
714 | */ | |
4bf590e0 | 715 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
716 | if (error < 0) |
717 | goto error; | |
718 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 719 | return clp; |
54ceac45 DH |
720 | |
721 | error: | |
722 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 723 | nfs_put_client(clp); |
54ceac45 | 724 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 725 | return ERR_PTR(error); |
54ceac45 | 726 | } |
ddda8e0a | 727 | EXPORT_SYMBOL_GPL(nfs_init_client); |
54ceac45 DH |
728 | |
729 | /* | |
730 | * Create a version 2 or 3 client | |
731 | */ | |
2283f8d6 | 732 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
733 | const struct nfs_parsed_mount_data *data, |
734 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 735 | { |
3a498026 TM |
736 | struct nfs_client_initdata cl_init = { |
737 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 738 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 739 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 740 | .nfs_mod = nfs_mod, |
59dca3b2 | 741 | .proto = data->nfs_server.protocol, |
e50a7a1a | 742 | .net = data->net, |
3a498026 | 743 | }; |
33170233 | 744 | struct rpc_timeout timeparms; |
54ceac45 | 745 | struct nfs_client *clp; |
3a498026 | 746 | int error; |
54ceac45 DH |
747 | |
748 | dprintk("--> nfs_init_server()\n"); | |
749 | ||
45a52a02 AA |
750 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
751 | data->timeo, data->retrans); | |
4bf590e0 CL |
752 | if (data->flags & NFS_MOUNT_NORESVPORT) |
753 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
89652617 CL |
754 | if (server->options & NFS_OPTION_MIGRATION) |
755 | set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); | |
45a52a02 | 756 | |
54ceac45 | 757 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 758 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
759 | if (IS_ERR(clp)) { |
760 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
761 | return PTR_ERR(clp); | |
762 | } | |
763 | ||
54ceac45 DH |
764 | server->nfs_client = clp; |
765 | ||
766 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 767 | server->flags = data->flags; |
b797cac7 | 768 | server->options = data->options; |
62ab460c TM |
769 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
770 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
3a1556e8 | 771 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; |
54ceac45 DH |
772 | |
773 | if (data->rsize) | |
774 | server->rsize = nfs_block_size(data->rsize, NULL); | |
775 | if (data->wsize) | |
776 | server->wsize = nfs_block_size(data->wsize, NULL); | |
777 | ||
778 | server->acregmin = data->acregmin * HZ; | |
779 | server->acregmax = data->acregmax * HZ; | |
780 | server->acdirmin = data->acdirmin * HZ; | |
781 | server->acdirmax = data->acdirmax * HZ; | |
782 | ||
783 | /* Start lockd here, before we might error out */ | |
784 | error = nfs_start_lockd(server); | |
785 | if (error < 0) | |
786 | goto error; | |
787 | ||
f22d6d79 CL |
788 | server->port = data->nfs_server.port; |
789 | ||
33170233 | 790 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
791 | if (error < 0) |
792 | goto error; | |
793 | ||
3f8400d1 CL |
794 | /* Preserve the values of mount_server-related mount options */ |
795 | if (data->mount_server.addrlen) { | |
796 | memcpy(&server->mountd_address, &data->mount_server.address, | |
797 | data->mount_server.addrlen); | |
798 | server->mountd_addrlen = data->mount_server.addrlen; | |
799 | } | |
800 | server->mountd_version = data->mount_server.version; | |
801 | server->mountd_port = data->mount_server.port; | |
802 | server->mountd_protocol = data->mount_server.protocol; | |
803 | ||
54ceac45 | 804 | server->namelen = data->namlen; |
54ceac45 DH |
805 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
806 | return 0; | |
807 | ||
808 | error: | |
809 | server->nfs_client = NULL; | |
810 | nfs_put_client(clp); | |
811 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
812 | return error; | |
813 | } | |
814 | ||
815 | /* | |
816 | * Load up the server record from information gained in an fsinfo record | |
817 | */ | |
738fd0f3 BH |
818 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
819 | struct nfs_fh *mntfh, | |
820 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
821 | { |
822 | unsigned long max_rpc_payload; | |
823 | ||
824 | /* Work out a lot of parameters */ | |
825 | if (server->rsize == 0) | |
826 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
827 | if (server->wsize == 0) | |
828 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
829 | ||
830 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
831 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
832 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
833 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
834 | ||
835 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
836 | if (server->rsize > max_rpc_payload) | |
837 | server->rsize = max_rpc_payload; | |
838 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
839 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
840 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 841 | |
d993831f | 842 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
843 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
844 | ||
845 | if (server->wsize > max_rpc_payload) | |
846 | server->wsize = max_rpc_payload; | |
847 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
848 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
849 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
85e174ba | 850 | |
54ceac45 DH |
851 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
852 | ||
853 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
854 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
855 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
856 | if (server->dtsize > server->rsize) |
857 | server->dtsize = server->rsize; | |
858 | ||
859 | if (server->flags & NFS_MOUNT_NOAC) { | |
860 | server->acregmin = server->acregmax = 0; | |
861 | server->acdirmin = server->acdirmax = 0; | |
862 | } | |
863 | ||
864 | server->maxfilesize = fsinfo->maxfilesize; | |
865 | ||
6b96724e RL |
866 | server->time_delta = fsinfo->time_delta; |
867 | ||
54ceac45 DH |
868 | /* We're airborne Set socket buffersize */ |
869 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
870 | } | |
871 | ||
872 | /* | |
873 | * Probe filesystem information, including the FSID on v2/v3 | |
874 | */ | |
fcf10398 | 875 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
876 | { |
877 | struct nfs_fsinfo fsinfo; | |
878 | struct nfs_client *clp = server->nfs_client; | |
879 | int error; | |
880 | ||
881 | dprintk("--> nfs_probe_fsinfo()\n"); | |
882 | ||
883 | if (clp->rpc_ops->set_capabilities != NULL) { | |
884 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
885 | if (error < 0) | |
886 | goto out_error; | |
887 | } | |
888 | ||
889 | fsinfo.fattr = fattr; | |
85e174ba | 890 | fsinfo.layouttype = 0; |
54ceac45 DH |
891 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
892 | if (error < 0) | |
893 | goto out_error; | |
894 | ||
738fd0f3 | 895 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
896 | |
897 | /* Get some general file system info */ | |
898 | if (server->namelen == 0) { | |
899 | struct nfs_pathconf pathinfo; | |
900 | ||
901 | pathinfo.fattr = fattr; | |
902 | nfs_fattr_init(fattr); | |
903 | ||
904 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
905 | server->namelen = pathinfo.max_namelen; | |
906 | } | |
907 | ||
908 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
909 | return 0; | |
910 | ||
911 | out_error: | |
912 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
913 | return error; | |
914 | } | |
89d77c8f | 915 | EXPORT_SYMBOL_GPL(nfs_probe_fsinfo); |
54ceac45 DH |
916 | |
917 | /* | |
918 | * Copy useful information when duplicating a server record | |
919 | */ | |
fcf10398 | 920 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
921 | { |
922 | target->flags = source->flags; | |
356e76b8 CL |
923 | target->rsize = source->rsize; |
924 | target->wsize = source->wsize; | |
54ceac45 DH |
925 | target->acregmin = source->acregmin; |
926 | target->acregmax = source->acregmax; | |
927 | target->acdirmin = source->acdirmin; | |
928 | target->acdirmax = source->acdirmax; | |
929 | target->caps = source->caps; | |
2df54806 | 930 | target->options = source->options; |
54ceac45 | 931 | } |
89d77c8f | 932 | EXPORT_SYMBOL_GPL(nfs_server_copy_userdata); |
54ceac45 | 933 | |
fcf10398 | 934 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
935 | { |
936 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 937 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 938 | |
dc030858 | 939 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 940 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 941 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 942 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 943 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
944 | |
945 | } | |
89d77c8f | 946 | EXPORT_SYMBOL_GPL(nfs_server_insert_lists); |
fca5238e CL |
947 | |
948 | static void nfs_server_remove_lists(struct nfs_server *server) | |
949 | { | |
d3b4c9d7 | 950 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 951 | struct nfs_net *nn; |
d3b4c9d7 | 952 | |
4c03ae4a TM |
953 | if (clp == NULL) |
954 | return; | |
73ea666c | 955 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 956 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 957 | list_del_rcu(&server->client_link); |
4c03ae4a | 958 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 959 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 960 | list_del(&server->master_link); |
dc030858 | 961 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
962 | |
963 | synchronize_rcu(); | |
964 | } | |
965 | ||
54ceac45 DH |
966 | /* |
967 | * Allocate and initialise a server record | |
968 | */ | |
fcf10398 | 969 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
970 | { |
971 | struct nfs_server *server; | |
972 | ||
973 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
974 | if (!server) | |
975 | return NULL; | |
976 | ||
977 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
978 | ||
979 | /* Zero out the NFS state stuff */ | |
980 | INIT_LIST_HEAD(&server->client_link); | |
981 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 982 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 983 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 984 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 985 | |
ef818a28 SD |
986 | atomic_set(&server->active, 0); |
987 | ||
54ceac45 DH |
988 | server->io_stats = nfs_alloc_iostats(); |
989 | if (!server->io_stats) { | |
990 | kfree(server); | |
991 | return NULL; | |
992 | } | |
993 | ||
48d07649 JA |
994 | if (bdi_init(&server->backing_dev_info)) { |
995 | nfs_free_iostats(server->io_stats); | |
996 | kfree(server); | |
997 | return NULL; | |
998 | } | |
999 | ||
9157c31d | 1000 | ida_init(&server->openowner_id); |
d2d7ce28 | 1001 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1002 | pnfs_init_server(server); |
1003 | ||
54ceac45 DH |
1004 | return server; |
1005 | } | |
89d77c8f | 1006 | EXPORT_SYMBOL_GPL(nfs_alloc_server); |
54ceac45 DH |
1007 | |
1008 | /* | |
1009 | * Free up a server record | |
1010 | */ | |
1011 | void nfs_free_server(struct nfs_server *server) | |
1012 | { | |
1013 | dprintk("--> nfs_free_server()\n"); | |
1014 | ||
fca5238e | 1015 | nfs_server_remove_lists(server); |
54ceac45 DH |
1016 | |
1017 | if (server->destroy != NULL) | |
1018 | server->destroy(server); | |
5cef338b TM |
1019 | |
1020 | if (!IS_ERR(server->client_acl)) | |
1021 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1022 | if (!IS_ERR(server->client)) |
1023 | rpc_shutdown_client(server->client); | |
1024 | ||
1025 | nfs_put_client(server->nfs_client); | |
1026 | ||
d2d7ce28 | 1027 | ida_destroy(&server->lockowner_id); |
9157c31d | 1028 | ida_destroy(&server->openowner_id); |
54ceac45 | 1029 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1030 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1031 | kfree(server); |
1032 | nfs_release_automount_timer(); | |
1033 | dprintk("<-- nfs_free_server()\n"); | |
1034 | } | |
89d77c8f | 1035 | EXPORT_SYMBOL_GPL(nfs_free_server); |
54ceac45 DH |
1036 | |
1037 | /* | |
1038 | * Create a version 2 or 3 volume record | |
1039 | * - keyed on server and FSID | |
1040 | */ | |
1179acc6 | 1041 | struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, |
ab7017a3 | 1042 | struct nfs_subversion *nfs_mod) |
54ceac45 DH |
1043 | { |
1044 | struct nfs_server *server; | |
fbca779a | 1045 | struct nfs_fattr *fattr; |
54ceac45 DH |
1046 | int error; |
1047 | ||
1048 | server = nfs_alloc_server(); | |
1049 | if (!server) | |
1050 | return ERR_PTR(-ENOMEM); | |
1051 | ||
fbca779a TM |
1052 | error = -ENOMEM; |
1053 | fattr = nfs_alloc_fattr(); | |
1054 | if (fattr == NULL) | |
1055 | goto error; | |
1056 | ||
54ceac45 | 1057 | /* Get a client representation */ |
1179acc6 | 1058 | error = nfs_init_server(server, mount_info->parsed, nfs_mod); |
54ceac45 DH |
1059 | if (error < 0) |
1060 | goto error; | |
1061 | ||
54ceac45 | 1062 | /* Probe the root fh to retrieve its FSID */ |
1179acc6 | 1063 | error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1064 | if (error < 0) |
1065 | goto error; | |
54af3bb5 TM |
1066 | if (server->nfs_client->rpc_ops->version == 3) { |
1067 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1068 | server->namelen = NFS3_MAXNAMLEN; | |
1179acc6 | 1069 | if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS)) |
54af3bb5 TM |
1070 | server->caps |= NFS_CAP_READDIRPLUS; |
1071 | } else { | |
1072 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1073 | server->namelen = NFS2_MAXNAMLEN; | |
1074 | } | |
1075 | ||
fbca779a | 1076 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1179acc6 | 1077 | error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh, fattr); |
54ceac45 DH |
1078 | if (error < 0) { |
1079 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1080 | goto error; | |
1081 | } | |
1082 | } | |
fbca779a | 1083 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1084 | |
6daabf1b DH |
1085 | dprintk("Server FSID: %llx:%llx\n", |
1086 | (unsigned long long) server->fsid.major, | |
1087 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1088 | |
fca5238e | 1089 | nfs_server_insert_lists(server); |
54ceac45 | 1090 | server->mount_time = jiffies; |
fbca779a | 1091 | nfs_free_fattr(fattr); |
54ceac45 DH |
1092 | return server; |
1093 | ||
1094 | error: | |
fbca779a | 1095 | nfs_free_fattr(fattr); |
54ceac45 DH |
1096 | nfs_free_server(server); |
1097 | return ERR_PTR(error); | |
1098 | } | |
ddda8e0a | 1099 | EXPORT_SYMBOL_GPL(nfs_create_server); |
54ceac45 | 1100 | |
54ceac45 DH |
1101 | /* |
1102 | * Clone an NFS2, NFS3 or NFS4 server record | |
1103 | */ | |
1104 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1105 | struct nfs_fh *fh, | |
7e6eb683 BS |
1106 | struct nfs_fattr *fattr, |
1107 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1108 | { |
1109 | struct nfs_server *server; | |
fbca779a | 1110 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1111 | int error; |
1112 | ||
1113 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1114 | (unsigned long long) fattr->fsid.major, |
1115 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1116 | |
1117 | server = nfs_alloc_server(); | |
1118 | if (!server) | |
1119 | return ERR_PTR(-ENOMEM); | |
1120 | ||
fbca779a TM |
1121 | error = -ENOMEM; |
1122 | fattr_fsinfo = nfs_alloc_fattr(); | |
1123 | if (fattr_fsinfo == NULL) | |
1124 | goto out_free_server; | |
1125 | ||
54ceac45 DH |
1126 | /* Copy data from the source */ |
1127 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1128 | server->destroy = source->destroy; |
54ceac45 DH |
1129 | atomic_inc(&server->nfs_client->cl_count); |
1130 | nfs_server_copy_userdata(server, source); | |
1131 | ||
1132 | server->fsid = fattr->fsid; | |
1133 | ||
33170233 TM |
1134 | error = nfs_init_server_rpcclient(server, |
1135 | source->client->cl_timeout, | |
7e6eb683 | 1136 | flavor); |
54ceac45 DH |
1137 | if (error < 0) |
1138 | goto out_free_server; | |
54ceac45 DH |
1139 | |
1140 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1141 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1142 | if (error < 0) |
1143 | goto out_free_server; | |
1144 | ||
54af3bb5 TM |
1145 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1146 | server->namelen = NFS4_MAXNAMLEN; | |
1147 | ||
54ceac45 | 1148 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1149 | (unsigned long long) server->fsid.major, |
1150 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1151 | |
1152 | error = nfs_start_lockd(server); | |
1153 | if (error < 0) | |
1154 | goto out_free_server; | |
1155 | ||
fca5238e | 1156 | nfs_server_insert_lists(server); |
54ceac45 DH |
1157 | server->mount_time = jiffies; |
1158 | ||
fbca779a | 1159 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1160 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1161 | return server; | |
1162 | ||
1163 | out_free_server: | |
fbca779a | 1164 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1165 | nfs_free_server(server); |
1166 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1167 | return ERR_PTR(error); | |
1168 | } | |
ddda8e0a | 1169 | EXPORT_SYMBOL_GPL(nfs_clone_server); |
6aaca566 | 1170 | |
6b13168b SK |
1171 | void nfs_clients_init(struct net *net) |
1172 | { | |
1173 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1174 | ||
1175 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1176 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
89d77c8f | 1177 | #if IS_ENABLED(CONFIG_NFS_V4) |
28cd1b3f SK |
1178 | idr_init(&nn->cb_ident_idr); |
1179 | #endif | |
4c03ae4a | 1180 | spin_lock_init(&nn->nfs_client_lock); |
f092075d | 1181 | nn->boot_time = CURRENT_TIME; |
6b13168b SK |
1182 | } |
1183 | ||
6aaca566 DH |
1184 | #ifdef CONFIG_PROC_FS |
1185 | static struct proc_dir_entry *proc_fs_nfs; | |
1186 | ||
1187 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1188 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1189 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1190 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1191 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1192 | ||
88e9d34c | 1193 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1194 | .start = nfs_server_list_start, |
1195 | .next = nfs_server_list_next, | |
1196 | .stop = nfs_server_list_stop, | |
1197 | .show = nfs_server_list_show, | |
1198 | }; | |
1199 | ||
00977a59 | 1200 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1201 | .open = nfs_server_list_open, |
1202 | .read = seq_read, | |
1203 | .llseek = seq_lseek, | |
1204 | .release = seq_release, | |
34b37235 | 1205 | .owner = THIS_MODULE, |
6aaca566 DH |
1206 | }; |
1207 | ||
1208 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1209 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1210 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1211 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1212 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1213 | ||
88e9d34c | 1214 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1215 | .start = nfs_volume_list_start, |
1216 | .next = nfs_volume_list_next, | |
1217 | .stop = nfs_volume_list_stop, | |
1218 | .show = nfs_volume_list_show, | |
1219 | }; | |
1220 | ||
00977a59 | 1221 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1222 | .open = nfs_volume_list_open, |
1223 | .read = seq_read, | |
1224 | .llseek = seq_lseek, | |
1225 | .release = seq_release, | |
34b37235 | 1226 | .owner = THIS_MODULE, |
6aaca566 DH |
1227 | }; |
1228 | ||
1229 | /* | |
1230 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1231 | * we're dealing | |
1232 | */ | |
1233 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1234 | { | |
1235 | struct seq_file *m; | |
1236 | int ret; | |
6b13168b SK |
1237 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1238 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1239 | |
1240 | ret = seq_open(file, &nfs_server_list_ops); | |
1241 | if (ret < 0) | |
1242 | return ret; | |
1243 | ||
1244 | m = file->private_data; | |
6b13168b | 1245 | m->private = net; |
6aaca566 DH |
1246 | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * set up the iterator to start reading from the server list and return the first item | |
1252 | */ | |
1253 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1254 | { | |
6b13168b SK |
1255 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1256 | ||
6aaca566 | 1257 | /* lock the list against modification */ |
dc030858 | 1258 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1259 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1260 | } |
1261 | ||
1262 | /* | |
1263 | * move to next server | |
1264 | */ | |
1265 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1266 | { | |
6b13168b SK |
1267 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1268 | ||
1269 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1270 | } |
1271 | ||
1272 | /* | |
1273 | * clean up after reading from the transports list | |
1274 | */ | |
1275 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1276 | { | |
dc030858 SK |
1277 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1278 | ||
1279 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1280 | } |
1281 | ||
1282 | /* | |
1283 | * display a header line followed by a load of call lines | |
1284 | */ | |
1285 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1286 | { | |
1287 | struct nfs_client *clp; | |
6b13168b | 1288 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1289 | |
1290 | /* display header on line 1 */ | |
6b13168b | 1291 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1292 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | /* display one transport per line on subsequent lines */ | |
1297 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1298 | ||
940aab49 MN |
1299 | /* Check if the client is initialized */ |
1300 | if (clp->cl_cons_state != NFS_CS_READY) | |
1301 | return 0; | |
1302 | ||
2446ab60 | 1303 | rcu_read_lock(); |
5d8515ca | 1304 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1305 | clp->rpc_ops->version, |
5d8515ca CL |
1306 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1307 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1308 | atomic_read(&clp->cl_count), |
1309 | clp->cl_hostname); | |
2446ab60 | 1310 | rcu_read_unlock(); |
6aaca566 DH |
1311 | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1317 | */ | |
1318 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1319 | { | |
1320 | struct seq_file *m; | |
1321 | int ret; | |
c25d32b2 SK |
1322 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1323 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1324 | |
1325 | ret = seq_open(file, &nfs_volume_list_ops); | |
1326 | if (ret < 0) | |
1327 | return ret; | |
1328 | ||
1329 | m = file->private_data; | |
c25d32b2 | 1330 | m->private = net; |
6aaca566 DH |
1331 | |
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * set up the iterator to start reading from the volume list and return the first item | |
1337 | */ | |
1338 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1339 | { | |
c25d32b2 SK |
1340 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1341 | ||
6aaca566 | 1342 | /* lock the list against modification */ |
dc030858 | 1343 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1344 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1345 | } |
1346 | ||
1347 | /* | |
1348 | * move to next volume | |
1349 | */ | |
1350 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1351 | { | |
c25d32b2 SK |
1352 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1353 | ||
1354 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1355 | } |
1356 | ||
1357 | /* | |
1358 | * clean up after reading from the transports list | |
1359 | */ | |
1360 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1361 | { | |
dc030858 SK |
1362 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1363 | ||
1364 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1365 | } |
1366 | ||
1367 | /* | |
1368 | * display a header line followed by a load of call lines | |
1369 | */ | |
1370 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1371 | { | |
1372 | struct nfs_server *server; | |
1373 | struct nfs_client *clp; | |
1374 | char dev[8], fsid[17]; | |
c25d32b2 | 1375 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1376 | |
1377 | /* display header on line 1 */ | |
c25d32b2 | 1378 | if (v == &nn->nfs_volume_list) { |
5d1acff1 | 1379 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1380 | return 0; |
1381 | } | |
1382 | /* display one transport per line on subsequent lines */ | |
1383 | server = list_entry(v, struct nfs_server, master_link); | |
1384 | clp = server->nfs_client; | |
1385 | ||
1386 | snprintf(dev, 8, "%u:%u", | |
1387 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1388 | ||
1389 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1390 | (unsigned long long) server->fsid.major, |
1391 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1392 | |
2446ab60 | 1393 | rcu_read_lock(); |
5d1acff1 | 1394 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1395 | clp->rpc_ops->version, |
5d8515ca CL |
1396 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1397 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1398 | dev, |
5d1acff1 DH |
1399 | fsid, |
1400 | nfs_server_fscache_state(server)); | |
2446ab60 | 1401 | rcu_read_unlock(); |
6aaca566 DH |
1402 | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * initialise the /proc/fs/nfsfs/ directory | |
1408 | */ | |
1409 | int __init nfs_fs_proc_init(void) | |
1410 | { | |
1411 | struct proc_dir_entry *p; | |
1412 | ||
36a5aeb8 | 1413 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1414 | if (!proc_fs_nfs) |
1415 | goto error_0; | |
1416 | ||
6aaca566 | 1417 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1418 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1419 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1420 | if (!p) |
1421 | goto error_1; | |
1422 | ||
6aaca566 | 1423 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1424 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1425 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1426 | if (!p) |
1427 | goto error_2; | |
6aaca566 DH |
1428 | return 0; |
1429 | ||
1430 | error_2: | |
1431 | remove_proc_entry("servers", proc_fs_nfs); | |
1432 | error_1: | |
36a5aeb8 | 1433 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1434 | error_0: |
1435 | return -ENOMEM; | |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * clean up the /proc/fs/nfsfs/ directory | |
1440 | */ | |
1441 | void nfs_fs_proc_exit(void) | |
1442 | { | |
1443 | remove_proc_entry("volumes", proc_fs_nfs); | |
1444 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1445 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1446 | } |
1447 | ||
1448 | #endif /* CONFIG_PROC_FS */ |