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 TM |
37 | #include <linux/in6.h> |
38 | #include <net/ipv6.h> | |
24c8dbbb DH |
39 | #include <linux/nfs_xdr.h> |
40 | ||
41 | #include <asm/system.h> | |
42 | ||
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
48 | ||
49 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
50 | ||
51 | static DEFINE_SPINLOCK(nfs_client_lock); | |
52 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 53 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
54 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
55 | ||
5006a76c DH |
56 | /* |
57 | * RPC cruft for NFS | |
58 | */ | |
59 | static struct rpc_version *nfs_version[5] = { | |
60 | [2] = &nfs_version2, | |
61 | #ifdef CONFIG_NFS_V3 | |
62 | [3] = &nfs_version3, | |
63 | #endif | |
64 | #ifdef CONFIG_NFS_V4 | |
65 | [4] = &nfs_version4, | |
66 | #endif | |
67 | }; | |
68 | ||
69 | struct rpc_program nfs_program = { | |
70 | .name = "nfs", | |
71 | .number = NFS_PROGRAM, | |
72 | .nrvers = ARRAY_SIZE(nfs_version), | |
73 | .version = nfs_version, | |
74 | .stats = &nfs_rpcstat, | |
75 | .pipe_dir_name = "/nfs", | |
76 | }; | |
77 | ||
78 | struct rpc_stat nfs_rpcstat = { | |
79 | .program = &nfs_program | |
80 | }; | |
81 | ||
82 | ||
83 | #ifdef CONFIG_NFS_V3_ACL | |
84 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
85 | static struct rpc_version * nfsacl_version[] = { | |
86 | [3] = &nfsacl_version3, | |
87 | }; | |
88 | ||
89 | struct rpc_program nfsacl_program = { | |
90 | .name = "nfsacl", | |
91 | .number = NFS_ACL_PROGRAM, | |
92 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
93 | .version = nfsacl_version, | |
94 | .stats = &nfsacl_rpcstat, | |
95 | }; | |
96 | #endif /* CONFIG_NFS_V3_ACL */ | |
97 | ||
3a498026 TM |
98 | struct nfs_client_initdata { |
99 | const char *hostname; | |
d7422c47 | 100 | const struct sockaddr *addr; |
6e4cffd7 | 101 | size_t addrlen; |
40c55319 | 102 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 103 | int proto; |
3a498026 TM |
104 | }; |
105 | ||
24c8dbbb DH |
106 | /* |
107 | * Allocate a shared client record | |
108 | * | |
109 | * Since these are allocated/deallocated very rarely, we don't | |
110 | * bother putting them in a slab cache... | |
111 | */ | |
3a498026 | 112 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
113 | { |
114 | struct nfs_client *clp; | |
7c67db3a | 115 | struct rpc_cred *cred; |
24c8dbbb DH |
116 | |
117 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
118 | goto error_0; | |
119 | ||
40c55319 TM |
120 | clp->rpc_ops = cl_init->rpc_ops; |
121 | ||
122 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
123 | if (nfs_callback_up() < 0) |
124 | goto error_2; | |
125 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
126 | } | |
127 | ||
128 | atomic_set(&clp->cl_count, 1); | |
129 | clp->cl_cons_state = NFS_CS_INITING; | |
130 | ||
6e4cffd7 CL |
131 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
132 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 133 | |
3a498026 TM |
134 | if (cl_init->hostname) { |
135 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
136 | if (!clp->cl_hostname) |
137 | goto error_3; | |
138 | } | |
139 | ||
140 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
141 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
142 | ||
59dca3b2 TM |
143 | clp->cl_proto = cl_init->proto; |
144 | ||
24c8dbbb | 145 | #ifdef CONFIG_NFS_V4 |
24c8dbbb | 146 | INIT_LIST_HEAD(&clp->cl_delegations); |
24c8dbbb | 147 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 148 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
149 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
150 | clp->cl_boot_time = CURRENT_TIME; | |
151 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
152 | #endif | |
7c67db3a TM |
153 | cred = rpc_lookup_machine_cred(); |
154 | if (!IS_ERR(cred)) | |
155 | clp->cl_machine_cred = cred; | |
24c8dbbb DH |
156 | |
157 | return clp; | |
158 | ||
159 | error_3: | |
9c5bf38d TM |
160 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
161 | nfs_callback_down(); | |
24c8dbbb | 162 | error_2: |
24c8dbbb DH |
163 | kfree(clp); |
164 | error_0: | |
165 | return NULL; | |
166 | } | |
167 | ||
5dd3177a TM |
168 | static void nfs4_shutdown_client(struct nfs_client *clp) |
169 | { | |
170 | #ifdef CONFIG_NFS_V4 | |
171 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
172 | nfs4_kill_renewd(clp); | |
9f958ab8 | 173 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
174 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
175 | nfs_idmap_delete(clp); | |
f6a1cc89 TM |
176 | |
177 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
5dd3177a TM |
178 | #endif |
179 | } | |
180 | ||
24c8dbbb DH |
181 | /* |
182 | * Destroy a shared client record | |
183 | */ | |
184 | static void nfs_free_client(struct nfs_client *clp) | |
185 | { | |
40c55319 | 186 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 187 | |
5dd3177a | 188 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
189 | |
190 | /* -EIO all pending I/O */ | |
191 | if (!IS_ERR(clp->cl_rpcclient)) | |
192 | rpc_shutdown_client(clp->cl_rpcclient); | |
193 | ||
194 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
195 | nfs_callback_down(); | |
196 | ||
7c67db3a TM |
197 | if (clp->cl_machine_cred != NULL) |
198 | put_rpccred(clp->cl_machine_cred); | |
199 | ||
24c8dbbb DH |
200 | kfree(clp->cl_hostname); |
201 | kfree(clp); | |
202 | ||
203 | dprintk("<-- nfs_free_client()\n"); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Release a reference to a shared client record | |
208 | */ | |
209 | void nfs_put_client(struct nfs_client *clp) | |
210 | { | |
27ba8512 DH |
211 | if (!clp) |
212 | return; | |
213 | ||
24c8dbbb DH |
214 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
215 | ||
216 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
217 | list_del(&clp->cl_share_link); | |
218 | spin_unlock(&nfs_client_lock); | |
219 | ||
220 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
221 | ||
222 | nfs_free_client(clp); | |
223 | } | |
224 | } | |
225 | ||
9082a5cc TM |
226 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
227 | static const struct in6_addr *nfs_map_ipv4_addr(const struct sockaddr *sa, struct in6_addr *addr_mapped) | |
3b0d3f93 | 228 | { |
9082a5cc TM |
229 | switch (sa->sa_family) { |
230 | default: | |
231 | return NULL; | |
232 | case AF_INET6: | |
233 | return &((const struct sockaddr_in6 *)sa)->sin6_addr; | |
234 | break; | |
235 | case AF_INET: | |
236 | ipv6_addr_set_v4mapped(((const struct sockaddr_in *)sa)->sin_addr.s_addr, | |
237 | addr_mapped); | |
238 | return addr_mapped; | |
239 | } | |
3b0d3f93 TM |
240 | } |
241 | ||
9082a5cc TM |
242 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
243 | const struct sockaddr *sa2) | |
3b0d3f93 | 244 | { |
9082a5cc TM |
245 | const struct in6_addr *addr1; |
246 | const struct in6_addr *addr2; | |
247 | struct in6_addr addr1_mapped; | |
248 | struct in6_addr addr2_mapped; | |
249 | ||
250 | addr1 = nfs_map_ipv4_addr(sa1, &addr1_mapped); | |
251 | if (likely(addr1 != NULL)) { | |
252 | addr2 = nfs_map_ipv4_addr(sa2, &addr2_mapped); | |
253 | if (likely(addr2 != NULL)) | |
254 | return ipv6_addr_equal(addr1, addr2); | |
255 | } | |
256 | return 0; | |
257 | } | |
258 | #else | |
259 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, | |
260 | const struct sockaddr_in *sa2) | |
261 | { | |
262 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
3b0d3f93 TM |
263 | } |
264 | ||
265 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
266 | const struct sockaddr *sa2) | |
267 | { | |
9082a5cc TM |
268 | if (unlikely(sa1->sa_family != AF_INET || sa2->sa_family != AF_INET)) |
269 | return 0; | |
270 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
271 | (const struct sockaddr_in *)sa2); | |
3b0d3f93 | 272 | } |
9082a5cc | 273 | #endif |
3b0d3f93 | 274 | |
24c8dbbb | 275 | /* |
c81468a1 TM |
276 | * Find a client by IP address and protocol version |
277 | * - returns NULL if no such client | |
24c8dbbb | 278 | */ |
ff052645 | 279 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
280 | { |
281 | struct nfs_client *clp; | |
282 | ||
c81468a1 | 283 | spin_lock(&nfs_client_lock); |
24c8dbbb | 284 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
285 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
286 | ||
13bbc06a | 287 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 288 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
289 | continue; |
290 | ||
24c8dbbb | 291 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 292 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
293 | continue; |
294 | ||
c81468a1 | 295 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 296 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
297 | continue; |
298 | ||
c81468a1 TM |
299 | atomic_inc(&clp->cl_count); |
300 | spin_unlock(&nfs_client_lock); | |
301 | return clp; | |
24c8dbbb | 302 | } |
c81468a1 | 303 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 304 | return NULL; |
24c8dbbb DH |
305 | } |
306 | ||
3fbd67ad TM |
307 | /* |
308 | * Find a client by IP address and protocol version | |
309 | * - returns NULL if no such client | |
310 | */ | |
311 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
312 | { | |
313 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
314 | u32 nfsvers = clp->rpc_ops->version; | |
315 | ||
316 | spin_lock(&nfs_client_lock); | |
317 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
318 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
319 | ||
320 | /* Don't match clients that failed to initialise properly */ | |
321 | if (clp->cl_cons_state != NFS_CS_READY) | |
322 | continue; | |
323 | ||
324 | /* Different NFS versions cannot share the same nfs_client */ | |
325 | if (clp->rpc_ops->version != nfsvers) | |
326 | continue; | |
327 | ||
3fbd67ad TM |
328 | /* Match only the IP address, not the port number */ |
329 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
330 | continue; | |
331 | ||
332 | atomic_inc(&clp->cl_count); | |
333 | spin_unlock(&nfs_client_lock); | |
334 | return clp; | |
335 | } | |
336 | spin_unlock(&nfs_client_lock); | |
337 | return NULL; | |
338 | } | |
339 | ||
24c8dbbb | 340 | /* |
c81468a1 TM |
341 | * Find an nfs_client on the list that matches the initialisation data |
342 | * that is supplied. | |
24c8dbbb | 343 | */ |
c81468a1 | 344 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
345 | { |
346 | struct nfs_client *clp; | |
347 | ||
c81468a1 TM |
348 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
349 | /* Don't match clients that failed to initialise properly */ | |
350 | if (clp->cl_cons_state < 0) | |
351 | continue; | |
352 | ||
353 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 354 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
355 | continue; |
356 | ||
59dca3b2 TM |
357 | if (clp->cl_proto != data->proto) |
358 | continue; | |
359 | ||
c81468a1 TM |
360 | /* Match the full socket address */ |
361 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
362 | continue; | |
363 | ||
364 | atomic_inc(&clp->cl_count); | |
365 | return clp; | |
13bbc06a | 366 | } |
c81468a1 | 367 | return NULL; |
24c8dbbb DH |
368 | } |
369 | ||
370 | /* | |
371 | * Look up a client by IP address and protocol version | |
372 | * - creates a new record if one doesn't yet exist | |
373 | */ | |
3a498026 | 374 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
375 | { |
376 | struct nfs_client *clp, *new = NULL; | |
377 | int error; | |
378 | ||
d7422c47 CL |
379 | dprintk("--> nfs_get_client(%s,v%u)\n", |
380 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
381 | |
382 | /* see if the client already exists */ | |
383 | do { | |
384 | spin_lock(&nfs_client_lock); | |
385 | ||
c81468a1 | 386 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
387 | if (clp) |
388 | goto found_client; | |
389 | if (new) | |
390 | goto install_client; | |
391 | ||
392 | spin_unlock(&nfs_client_lock); | |
393 | ||
3a498026 | 394 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
395 | } while (new); |
396 | ||
397 | return ERR_PTR(-ENOMEM); | |
398 | ||
399 | /* install a new client and return with it unready */ | |
400 | install_client: | |
401 | clp = new; | |
402 | list_add(&clp->cl_share_link, &nfs_client_list); | |
403 | spin_unlock(&nfs_client_lock); | |
404 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
405 | return clp; | |
406 | ||
407 | /* found an existing client | |
408 | * - make sure it's ready before returning | |
409 | */ | |
410 | found_client: | |
411 | spin_unlock(&nfs_client_lock); | |
412 | ||
413 | if (new) | |
414 | nfs_free_client(new); | |
415 | ||
150030b7 | 416 | error = wait_event_killable(nfs_client_active_wq, |
0bae89ec TM |
417 | clp->cl_cons_state != NFS_CS_INITING); |
418 | if (error < 0) { | |
419 | nfs_put_client(clp); | |
420 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
421 | } |
422 | ||
423 | if (clp->cl_cons_state < NFS_CS_READY) { | |
424 | error = clp->cl_cons_state; | |
425 | nfs_put_client(clp); | |
426 | return ERR_PTR(error); | |
427 | } | |
428 | ||
54ceac45 DH |
429 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
430 | ||
24c8dbbb DH |
431 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
432 | return clp; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Mark a server as ready or failed | |
437 | */ | |
54ceac45 | 438 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
439 | { |
440 | clp->cl_cons_state = state; | |
441 | wake_up_all(&nfs_client_active_wq); | |
442 | } | |
5006a76c DH |
443 | |
444 | /* | |
445 | * Initialise the timeout values for a connection | |
446 | */ | |
447 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
448 | unsigned int timeo, unsigned int retrans) | |
449 | { | |
450 | to->to_initval = timeo * HZ / 10; | |
451 | to->to_retries = retrans; | |
5006a76c DH |
452 | |
453 | switch (proto) { | |
0896a725 | 454 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 455 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
456 | if (to->to_retries == 0) |
457 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 458 | if (to->to_initval == 0) |
259875ef | 459 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
460 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
461 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
462 | to->to_increment = to->to_initval; | |
463 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
464 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
465 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
466 | if (to->to_maxval < to->to_initval) | |
467 | to->to_maxval = to->to_initval; | |
5006a76c DH |
468 | to->to_exponential = 0; |
469 | break; | |
0896a725 | 470 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
471 | if (to->to_retries == 0) |
472 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 473 | if (!to->to_initval) |
259875ef | 474 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
475 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
476 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
477 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
478 | to->to_exponential = 1; | |
479 | break; | |
259875ef TM |
480 | default: |
481 | BUG(); | |
5006a76c DH |
482 | } |
483 | } | |
484 | ||
485 | /* | |
486 | * Create an RPC client handle | |
487 | */ | |
59dca3b2 | 488 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
489 | const struct rpc_timeout *timeparms, |
490 | rpc_authflavor_t flavor, | |
4a01b8a4 | 491 | int discrtry, int noresvport) |
5006a76c | 492 | { |
5006a76c | 493 | struct rpc_clnt *clnt = NULL; |
41877d20 | 494 | struct rpc_create_args args = { |
59dca3b2 | 495 | .protocol = clp->cl_proto, |
41877d20 | 496 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 497 | .addrsize = clp->cl_addrlen, |
33170233 | 498 | .timeout = timeparms, |
41877d20 CL |
499 | .servername = clp->cl_hostname, |
500 | .program = &nfs_program, | |
501 | .version = clp->rpc_ops->version, | |
502 | .authflavor = flavor, | |
503 | }; | |
5006a76c | 504 | |
4a01b8a4 CL |
505 | if (discrtry) |
506 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
507 | if (noresvport) | |
508 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
509 | ||
5006a76c DH |
510 | if (!IS_ERR(clp->cl_rpcclient)) |
511 | return 0; | |
512 | ||
41877d20 | 513 | clnt = rpc_create(&args); |
5006a76c DH |
514 | if (IS_ERR(clnt)) { |
515 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 516 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
517 | return PTR_ERR(clnt); |
518 | } | |
519 | ||
5006a76c DH |
520 | clp->cl_rpcclient = clnt; |
521 | return 0; | |
522 | } | |
54ceac45 DH |
523 | |
524 | /* | |
525 | * Version 2 or 3 client destruction | |
526 | */ | |
527 | static void nfs_destroy_server(struct nfs_server *server) | |
528 | { | |
54ceac45 | 529 | if (!(server->flags & NFS_MOUNT_NONLM)) |
9289e7f9 | 530 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
531 | } |
532 | ||
533 | /* | |
534 | * Version 2 or 3 lockd setup | |
535 | */ | |
536 | static int nfs_start_lockd(struct nfs_server *server) | |
537 | { | |
9289e7f9 CL |
538 | struct nlm_host *host; |
539 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
540 | struct nlmclnt_initdata nlm_init = { |
541 | .hostname = clp->cl_hostname, | |
542 | .address = (struct sockaddr *)&clp->cl_addr, | |
543 | .addrlen = clp->cl_addrlen, | |
544 | .protocol = server->flags & NFS_MOUNT_TCP ? | |
545 | IPPROTO_TCP : IPPROTO_UDP, | |
546 | .nfs_version = clp->rpc_ops->version, | |
0cb2659b CL |
547 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
548 | 1 : 0, | |
883bb163 | 549 | }; |
54ceac45 | 550 | |
883bb163 | 551 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 552 | return 0; |
54ceac45 | 553 | if (server->flags & NFS_MOUNT_NONLM) |
9289e7f9 CL |
554 | return 0; |
555 | ||
883bb163 | 556 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
557 | if (IS_ERR(host)) |
558 | return PTR_ERR(host); | |
559 | ||
560 | server->nlm_host = host; | |
561 | server->destroy = nfs_destroy_server; | |
562 | return 0; | |
54ceac45 DH |
563 | } |
564 | ||
565 | /* | |
566 | * Initialise an NFSv3 ACL client connection | |
567 | */ | |
568 | #ifdef CONFIG_NFS_V3_ACL | |
569 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
570 | { | |
40c55319 | 571 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
572 | goto out_noacl; |
573 | if (server->flags & NFS_MOUNT_NOACL) | |
574 | goto out_noacl; | |
575 | ||
576 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
577 | if (IS_ERR(server->client_acl)) | |
578 | goto out_noacl; | |
579 | ||
580 | /* No errors! Assume that Sun nfsacls are supported */ | |
581 | server->caps |= NFS_CAP_ACLS; | |
582 | return; | |
583 | ||
584 | out_noacl: | |
585 | server->caps &= ~NFS_CAP_ACLS; | |
586 | } | |
587 | #else | |
588 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
589 | { | |
590 | server->flags &= ~NFS_MOUNT_NOACL; | |
591 | server->caps &= ~NFS_CAP_ACLS; | |
592 | } | |
593 | #endif | |
594 | ||
595 | /* | |
596 | * Create a general RPC client | |
597 | */ | |
33170233 TM |
598 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
599 | const struct rpc_timeout *timeo, | |
600 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
601 | { |
602 | struct nfs_client *clp = server->nfs_client; | |
603 | ||
604 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
605 | if (IS_ERR(server->client)) { | |
3110ff80 | 606 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
607 | return PTR_ERR(server->client); |
608 | } | |
609 | ||
33170233 TM |
610 | memcpy(&server->client->cl_timeout_default, |
611 | timeo, | |
612 | sizeof(server->client->cl_timeout_default)); | |
613 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
614 | ||
54ceac45 DH |
615 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
616 | struct rpc_auth *auth; | |
617 | ||
618 | auth = rpcauth_create(pseudoflavour, server->client); | |
619 | if (IS_ERR(auth)) { | |
3110ff80 | 620 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
621 | return PTR_ERR(auth); |
622 | } | |
623 | } | |
624 | server->client->cl_softrtry = 0; | |
625 | if (server->flags & NFS_MOUNT_SOFT) | |
626 | server->client->cl_softrtry = 1; | |
627 | ||
54ceac45 DH |
628 | return 0; |
629 | } | |
630 | ||
631 | /* | |
632 | * Initialise an NFS2 or NFS3 client | |
633 | */ | |
2283f8d6 | 634 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 635 | const struct rpc_timeout *timeparms, |
2283f8d6 | 636 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 637 | { |
54ceac45 DH |
638 | int error; |
639 | ||
640 | if (clp->cl_cons_state == NFS_CS_READY) { | |
641 | /* the client is already initialised */ | |
642 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
643 | return 0; | |
644 | } | |
645 | ||
54ceac45 DH |
646 | /* |
647 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
648 | * - RFC 2623, sec 2.3.2 | |
649 | */ | |
d740351b CL |
650 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
651 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
652 | if (error < 0) |
653 | goto error; | |
654 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
655 | return 0; | |
656 | ||
657 | error: | |
658 | nfs_mark_client_ready(clp, error); | |
659 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
660 | return error; | |
661 | } | |
662 | ||
663 | /* | |
664 | * Create a version 2 or 3 client | |
665 | */ | |
2283f8d6 TT |
666 | static int nfs_init_server(struct nfs_server *server, |
667 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 668 | { |
3a498026 TM |
669 | struct nfs_client_initdata cl_init = { |
670 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 671 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 672 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 673 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 674 | .proto = data->nfs_server.protocol, |
3a498026 | 675 | }; |
33170233 | 676 | struct rpc_timeout timeparms; |
54ceac45 | 677 | struct nfs_client *clp; |
3a498026 | 678 | int error; |
54ceac45 DH |
679 | |
680 | dprintk("--> nfs_init_server()\n"); | |
681 | ||
682 | #ifdef CONFIG_NFS_V3 | |
683 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 684 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
685 | #endif |
686 | ||
687 | /* Allocate or find a client reference we can use */ | |
3a498026 | 688 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
689 | if (IS_ERR(clp)) { |
690 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
691 | return PTR_ERR(clp); | |
692 | } | |
693 | ||
33170233 TM |
694 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
695 | data->timeo, data->retrans); | |
696 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
697 | if (error < 0) |
698 | goto error; | |
699 | ||
700 | server->nfs_client = clp; | |
701 | ||
702 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 703 | server->flags = data->flags; |
54ceac45 DH |
704 | |
705 | if (data->rsize) | |
706 | server->rsize = nfs_block_size(data->rsize, NULL); | |
707 | if (data->wsize) | |
708 | server->wsize = nfs_block_size(data->wsize, NULL); | |
709 | ||
710 | server->acregmin = data->acregmin * HZ; | |
711 | server->acregmax = data->acregmax * HZ; | |
712 | server->acdirmin = data->acdirmin * HZ; | |
713 | server->acdirmax = data->acdirmax * HZ; | |
714 | ||
715 | /* Start lockd here, before we might error out */ | |
716 | error = nfs_start_lockd(server); | |
717 | if (error < 0) | |
718 | goto error; | |
719 | ||
f22d6d79 CL |
720 | server->port = data->nfs_server.port; |
721 | ||
33170233 | 722 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
723 | if (error < 0) |
724 | goto error; | |
725 | ||
3f8400d1 CL |
726 | /* Preserve the values of mount_server-related mount options */ |
727 | if (data->mount_server.addrlen) { | |
728 | memcpy(&server->mountd_address, &data->mount_server.address, | |
729 | data->mount_server.addrlen); | |
730 | server->mountd_addrlen = data->mount_server.addrlen; | |
731 | } | |
732 | server->mountd_version = data->mount_server.version; | |
733 | server->mountd_port = data->mount_server.port; | |
734 | server->mountd_protocol = data->mount_server.protocol; | |
735 | ||
54ceac45 DH |
736 | server->namelen = data->namlen; |
737 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
738 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
739 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
740 | return 0; | |
741 | ||
742 | error: | |
743 | server->nfs_client = NULL; | |
744 | nfs_put_client(clp); | |
745 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
746 | return error; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Load up the server record from information gained in an fsinfo record | |
751 | */ | |
752 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
753 | { | |
754 | unsigned long max_rpc_payload; | |
755 | ||
756 | /* Work out a lot of parameters */ | |
757 | if (server->rsize == 0) | |
758 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
759 | if (server->wsize == 0) | |
760 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
761 | ||
762 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
763 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
764 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
765 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
766 | ||
767 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
768 | if (server->rsize > max_rpc_payload) | |
769 | server->rsize = max_rpc_payload; | |
770 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
771 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
772 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 773 | |
54ceac45 DH |
774 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
775 | ||
776 | if (server->wsize > max_rpc_payload) | |
777 | server->wsize = max_rpc_payload; | |
778 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
779 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
780 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
781 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
782 | ||
783 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
784 | if (server->dtsize > PAGE_CACHE_SIZE) | |
785 | server->dtsize = PAGE_CACHE_SIZE; | |
786 | if (server->dtsize > server->rsize) | |
787 | server->dtsize = server->rsize; | |
788 | ||
789 | if (server->flags & NFS_MOUNT_NOAC) { | |
790 | server->acregmin = server->acregmax = 0; | |
791 | server->acdirmin = server->acdirmax = 0; | |
792 | } | |
793 | ||
794 | server->maxfilesize = fsinfo->maxfilesize; | |
795 | ||
796 | /* We're airborne Set socket buffersize */ | |
797 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
798 | } | |
799 | ||
800 | /* | |
801 | * Probe filesystem information, including the FSID on v2/v3 | |
802 | */ | |
803 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
804 | { | |
805 | struct nfs_fsinfo fsinfo; | |
806 | struct nfs_client *clp = server->nfs_client; | |
807 | int error; | |
808 | ||
809 | dprintk("--> nfs_probe_fsinfo()\n"); | |
810 | ||
811 | if (clp->rpc_ops->set_capabilities != NULL) { | |
812 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
813 | if (error < 0) | |
814 | goto out_error; | |
815 | } | |
816 | ||
817 | fsinfo.fattr = fattr; | |
818 | nfs_fattr_init(fattr); | |
819 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
820 | if (error < 0) | |
821 | goto out_error; | |
822 | ||
823 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
824 | error = bdi_init(&server->backing_dev_info); |
825 | if (error) | |
826 | goto out_error; | |
827 | ||
54ceac45 DH |
828 | |
829 | /* Get some general file system info */ | |
830 | if (server->namelen == 0) { | |
831 | struct nfs_pathconf pathinfo; | |
832 | ||
833 | pathinfo.fattr = fattr; | |
834 | nfs_fattr_init(fattr); | |
835 | ||
836 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
837 | server->namelen = pathinfo.max_namelen; | |
838 | } | |
839 | ||
840 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
841 | return 0; | |
842 | ||
843 | out_error: | |
844 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
845 | return error; | |
846 | } | |
847 | ||
848 | /* | |
849 | * Copy useful information when duplicating a server record | |
850 | */ | |
851 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
852 | { | |
853 | target->flags = source->flags; | |
854 | target->acregmin = source->acregmin; | |
855 | target->acregmax = source->acregmax; | |
856 | target->acdirmin = source->acdirmin; | |
857 | target->acdirmax = source->acdirmax; | |
858 | target->caps = source->caps; | |
859 | } | |
860 | ||
861 | /* | |
862 | * Allocate and initialise a server record | |
863 | */ | |
864 | static struct nfs_server *nfs_alloc_server(void) | |
865 | { | |
866 | struct nfs_server *server; | |
867 | ||
868 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
869 | if (!server) | |
870 | return NULL; | |
871 | ||
872 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
873 | ||
874 | /* Zero out the NFS state stuff */ | |
875 | INIT_LIST_HEAD(&server->client_link); | |
876 | INIT_LIST_HEAD(&server->master_link); | |
877 | ||
ef818a28 SD |
878 | atomic_set(&server->active, 0); |
879 | ||
54ceac45 DH |
880 | server->io_stats = nfs_alloc_iostats(); |
881 | if (!server->io_stats) { | |
882 | kfree(server); | |
883 | return NULL; | |
884 | } | |
885 | ||
886 | return server; | |
887 | } | |
888 | ||
889 | /* | |
890 | * Free up a server record | |
891 | */ | |
892 | void nfs_free_server(struct nfs_server *server) | |
893 | { | |
894 | dprintk("--> nfs_free_server()\n"); | |
895 | ||
896 | spin_lock(&nfs_client_lock); | |
897 | list_del(&server->client_link); | |
898 | list_del(&server->master_link); | |
899 | spin_unlock(&nfs_client_lock); | |
900 | ||
901 | if (server->destroy != NULL) | |
902 | server->destroy(server); | |
5cef338b TM |
903 | |
904 | if (!IS_ERR(server->client_acl)) | |
905 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
906 | if (!IS_ERR(server->client)) |
907 | rpc_shutdown_client(server->client); | |
908 | ||
909 | nfs_put_client(server->nfs_client); | |
910 | ||
911 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 912 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
913 | kfree(server); |
914 | nfs_release_automount_timer(); | |
915 | dprintk("<-- nfs_free_server()\n"); | |
916 | } | |
917 | ||
918 | /* | |
919 | * Create a version 2 or 3 volume record | |
920 | * - keyed on server and FSID | |
921 | */ | |
2283f8d6 | 922 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
923 | struct nfs_fh *mntfh) |
924 | { | |
925 | struct nfs_server *server; | |
926 | struct nfs_fattr fattr; | |
927 | int error; | |
928 | ||
929 | server = nfs_alloc_server(); | |
930 | if (!server) | |
931 | return ERR_PTR(-ENOMEM); | |
932 | ||
933 | /* Get a client representation */ | |
934 | error = nfs_init_server(server, data); | |
935 | if (error < 0) | |
936 | goto error; | |
937 | ||
938 | BUG_ON(!server->nfs_client); | |
939 | BUG_ON(!server->nfs_client->rpc_ops); | |
940 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
941 | ||
942 | /* Probe the root fh to retrieve its FSID */ | |
943 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
944 | if (error < 0) | |
945 | goto error; | |
54af3bb5 TM |
946 | if (server->nfs_client->rpc_ops->version == 3) { |
947 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
948 | server->namelen = NFS3_MAXNAMLEN; | |
949 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
950 | server->caps |= NFS_CAP_READDIRPLUS; | |
951 | } else { | |
952 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
953 | server->namelen = NFS2_MAXNAMLEN; | |
954 | } | |
955 | ||
54ceac45 DH |
956 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
957 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
958 | if (error < 0) { | |
959 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
960 | goto error; | |
961 | } | |
962 | } | |
963 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
964 | ||
6daabf1b DH |
965 | dprintk("Server FSID: %llx:%llx\n", |
966 | (unsigned long long) server->fsid.major, | |
967 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
968 | |
969 | BUG_ON(!server->nfs_client); | |
970 | BUG_ON(!server->nfs_client->rpc_ops); | |
971 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
972 | ||
973 | spin_lock(&nfs_client_lock); | |
974 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
975 | list_add_tail(&server->master_link, &nfs_volume_list); | |
976 | spin_unlock(&nfs_client_lock); | |
977 | ||
978 | server->mount_time = jiffies; | |
979 | return server; | |
980 | ||
981 | error: | |
982 | nfs_free_server(server); | |
983 | return ERR_PTR(error); | |
984 | } | |
985 | ||
986 | #ifdef CONFIG_NFS_V4 | |
987 | /* | |
988 | * Initialise an NFS4 client record | |
989 | */ | |
990 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 991 | const struct rpc_timeout *timeparms, |
7d9ac06f | 992 | const char *ip_addr, |
d740351b CL |
993 | rpc_authflavor_t authflavour, |
994 | int flags) | |
54ceac45 DH |
995 | { |
996 | int error; | |
997 | ||
998 | if (clp->cl_cons_state == NFS_CS_READY) { | |
999 | /* the client is initialised already */ | |
1000 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1005 | clp->rpc_ops = &nfs_v4_clientops; | |
1006 | ||
59dca3b2 | 1007 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1008 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1009 | if (error < 0) |
1010 | goto error; | |
7d9ac06f | 1011 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1012 | |
1013 | error = nfs_idmap_new(clp); | |
1014 | if (error < 0) { | |
1015 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1016 | __func__, error); |
54ceac45 DH |
1017 | goto error; |
1018 | } | |
9c5bf38d | 1019 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
1020 | |
1021 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
1022 | return 0; | |
1023 | ||
1024 | error: | |
1025 | nfs_mark_client_ready(clp, error); | |
1026 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1027 | return error; | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Set up an NFS4 client | |
1032 | */ | |
1033 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1034 | const char *hostname, |
1035 | const struct sockaddr *addr, | |
1036 | const size_t addrlen, | |
7d9ac06f | 1037 | const char *ip_addr, |
54ceac45 | 1038 | rpc_authflavor_t authflavour, |
33170233 | 1039 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 1040 | { |
3a498026 TM |
1041 | struct nfs_client_initdata cl_init = { |
1042 | .hostname = hostname, | |
dcecae0f CL |
1043 | .addr = addr, |
1044 | .addrlen = addrlen, | |
40c55319 | 1045 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1046 | .proto = proto, |
3a498026 | 1047 | }; |
54ceac45 DH |
1048 | struct nfs_client *clp; |
1049 | int error; | |
1050 | ||
1051 | dprintk("--> nfs4_set_client()\n"); | |
1052 | ||
1053 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1054 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1055 | if (IS_ERR(clp)) { |
1056 | error = PTR_ERR(clp); | |
1057 | goto error; | |
1058 | } | |
d740351b CL |
1059 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1060 | server->flags); | |
54ceac45 DH |
1061 | if (error < 0) |
1062 | goto error_put; | |
1063 | ||
1064 | server->nfs_client = clp; | |
1065 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1066 | return 0; | |
1067 | ||
1068 | error_put: | |
1069 | nfs_put_client(clp); | |
1070 | error: | |
1071 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1072 | return error; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Create a version 4 volume record | |
1077 | */ | |
1078 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1079 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1080 | { |
33170233 | 1081 | struct rpc_timeout timeparms; |
54ceac45 DH |
1082 | int error; |
1083 | ||
1084 | dprintk("--> nfs4_init_server()\n"); | |
1085 | ||
33170233 TM |
1086 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1087 | data->timeo, data->retrans); | |
1088 | ||
542fcc33 CL |
1089 | /* Initialise the client representation from the mount data */ |
1090 | server->flags = data->flags; | |
1091 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1092 | ||
33170233 TM |
1093 | /* Get a client record */ |
1094 | error = nfs4_set_client(server, | |
1095 | data->nfs_server.hostname, | |
1096 | (const struct sockaddr *)&data->nfs_server.address, | |
1097 | data->nfs_server.addrlen, | |
1098 | data->client_address, | |
1099 | data->auth_flavors[0], | |
1100 | data->nfs_server.protocol, | |
1101 | &timeparms); | |
1102 | if (error < 0) | |
1103 | goto error; | |
1104 | ||
54ceac45 DH |
1105 | if (data->rsize) |
1106 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1107 | if (data->wsize) | |
1108 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1109 | ||
1110 | server->acregmin = data->acregmin * HZ; | |
1111 | server->acregmax = data->acregmax * HZ; | |
1112 | server->acdirmin = data->acdirmin * HZ; | |
1113 | server->acdirmax = data->acdirmax * HZ; | |
1114 | ||
f22d6d79 CL |
1115 | server->port = data->nfs_server.port; |
1116 | ||
33170233 | 1117 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1118 | |
33170233 | 1119 | error: |
54ceac45 DH |
1120 | /* Done */ |
1121 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1122 | return error; | |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * Create a version 4 volume record | |
1127 | * - keyed on server and FSID | |
1128 | */ | |
91ea40b9 | 1129 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1130 | struct nfs_fh *mntfh) |
1131 | { | |
1132 | struct nfs_fattr fattr; | |
1133 | struct nfs_server *server; | |
1134 | int error; | |
1135 | ||
1136 | dprintk("--> nfs4_create_server()\n"); | |
1137 | ||
1138 | server = nfs_alloc_server(); | |
1139 | if (!server) | |
1140 | return ERR_PTR(-ENOMEM); | |
1141 | ||
54ceac45 | 1142 | /* set up the general RPC client */ |
91ea40b9 | 1143 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1144 | if (error < 0) |
1145 | goto error; | |
1146 | ||
1147 | BUG_ON(!server->nfs_client); | |
1148 | BUG_ON(!server->nfs_client->rpc_ops); | |
1149 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1150 | ||
1151 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1152 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1153 | if (error < 0) |
1154 | goto error; | |
1155 | ||
6daabf1b DH |
1156 | dprintk("Server FSID: %llx:%llx\n", |
1157 | (unsigned long long) server->fsid.major, | |
1158 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1159 | dprintk("Mount FH: %d\n", mntfh->size); |
1160 | ||
1161 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1162 | if (error < 0) | |
1163 | goto error; | |
1164 | ||
54af3bb5 TM |
1165 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1166 | server->namelen = NFS4_MAXNAMLEN; | |
1167 | ||
54ceac45 DH |
1168 | BUG_ON(!server->nfs_client); |
1169 | BUG_ON(!server->nfs_client->rpc_ops); | |
1170 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1171 | ||
1172 | spin_lock(&nfs_client_lock); | |
1173 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1174 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1175 | spin_unlock(&nfs_client_lock); | |
1176 | ||
1177 | server->mount_time = jiffies; | |
1178 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1179 | return server; | |
1180 | ||
1181 | error: | |
1182 | nfs_free_server(server); | |
1183 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1184 | return ERR_PTR(error); | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * Create an NFS4 referral server record | |
1189 | */ | |
1190 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1191 | struct nfs_fh *mntfh) |
54ceac45 DH |
1192 | { |
1193 | struct nfs_client *parent_client; | |
1194 | struct nfs_server *server, *parent_server; | |
1195 | struct nfs_fattr fattr; | |
1196 | int error; | |
1197 | ||
1198 | dprintk("--> nfs4_create_referral_server()\n"); | |
1199 | ||
1200 | server = nfs_alloc_server(); | |
1201 | if (!server) | |
1202 | return ERR_PTR(-ENOMEM); | |
1203 | ||
1204 | parent_server = NFS_SB(data->sb); | |
1205 | parent_client = parent_server->nfs_client; | |
1206 | ||
542fcc33 CL |
1207 | /* Initialise the client representation from the parent server */ |
1208 | nfs_server_copy_userdata(server, parent_server); | |
1209 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1210 | ||
54ceac45 DH |
1211 | /* Get a client representation. |
1212 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1213 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1214 | data->addr, |
1215 | data->addrlen, | |
dcecae0f CL |
1216 | parent_client->cl_ipaddr, |
1217 | data->authflavor, | |
1218 | parent_server->client->cl_xprt->prot, | |
33170233 | 1219 | parent_server->client->cl_timeout); |
297de4f6 | 1220 | if (error < 0) |
1221 | goto error; | |
54ceac45 | 1222 | |
33170233 | 1223 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1224 | if (error < 0) |
1225 | goto error; | |
1226 | ||
1227 | BUG_ON(!server->nfs_client); | |
1228 | BUG_ON(!server->nfs_client->rpc_ops); | |
1229 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1230 | ||
f2d0d85e TM |
1231 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1232 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1233 | if (error < 0) | |
1234 | goto error; | |
1235 | ||
54ceac45 | 1236 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1237 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1238 | if (error < 0) |
1239 | goto error; | |
1240 | ||
54af3bb5 TM |
1241 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1242 | server->namelen = NFS4_MAXNAMLEN; | |
1243 | ||
54ceac45 | 1244 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1245 | (unsigned long long) server->fsid.major, |
1246 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1247 | |
1248 | spin_lock(&nfs_client_lock); | |
1249 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1250 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1251 | spin_unlock(&nfs_client_lock); | |
1252 | ||
1253 | server->mount_time = jiffies; | |
1254 | ||
1255 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1256 | return server; | |
1257 | ||
1258 | error: | |
1259 | nfs_free_server(server); | |
1260 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1261 | return ERR_PTR(error); | |
1262 | } | |
1263 | ||
1264 | #endif /* CONFIG_NFS_V4 */ | |
1265 | ||
1266 | /* | |
1267 | * Clone an NFS2, NFS3 or NFS4 server record | |
1268 | */ | |
1269 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1270 | struct nfs_fh *fh, | |
1271 | struct nfs_fattr *fattr) | |
1272 | { | |
1273 | struct nfs_server *server; | |
1274 | struct nfs_fattr fattr_fsinfo; | |
1275 | int error; | |
1276 | ||
1277 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1278 | (unsigned long long) fattr->fsid.major, |
1279 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1280 | |
1281 | server = nfs_alloc_server(); | |
1282 | if (!server) | |
1283 | return ERR_PTR(-ENOMEM); | |
1284 | ||
1285 | /* Copy data from the source */ | |
1286 | server->nfs_client = source->nfs_client; | |
1287 | atomic_inc(&server->nfs_client->cl_count); | |
1288 | nfs_server_copy_userdata(server, source); | |
1289 | ||
1290 | server->fsid = fattr->fsid; | |
1291 | ||
33170233 TM |
1292 | error = nfs_init_server_rpcclient(server, |
1293 | source->client->cl_timeout, | |
1294 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1295 | if (error < 0) |
1296 | goto out_free_server; | |
1297 | if (!IS_ERR(source->client_acl)) | |
1298 | nfs_init_server_aclclient(server); | |
1299 | ||
1300 | /* probe the filesystem info for this server filesystem */ | |
1301 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1302 | if (error < 0) | |
1303 | goto out_free_server; | |
1304 | ||
54af3bb5 TM |
1305 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1306 | server->namelen = NFS4_MAXNAMLEN; | |
1307 | ||
54ceac45 | 1308 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1309 | (unsigned long long) server->fsid.major, |
1310 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1311 | |
1312 | error = nfs_start_lockd(server); | |
1313 | if (error < 0) | |
1314 | goto out_free_server; | |
1315 | ||
1316 | spin_lock(&nfs_client_lock); | |
1317 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1318 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1319 | spin_unlock(&nfs_client_lock); | |
1320 | ||
1321 | server->mount_time = jiffies; | |
1322 | ||
1323 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1324 | return server; | |
1325 | ||
1326 | out_free_server: | |
1327 | nfs_free_server(server); | |
1328 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1329 | return ERR_PTR(error); | |
1330 | } | |
6aaca566 DH |
1331 | |
1332 | #ifdef CONFIG_PROC_FS | |
1333 | static struct proc_dir_entry *proc_fs_nfs; | |
1334 | ||
1335 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1336 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1337 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1338 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1339 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1340 | ||
1341 | static struct seq_operations nfs_server_list_ops = { | |
1342 | .start = nfs_server_list_start, | |
1343 | .next = nfs_server_list_next, | |
1344 | .stop = nfs_server_list_stop, | |
1345 | .show = nfs_server_list_show, | |
1346 | }; | |
1347 | ||
00977a59 | 1348 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1349 | .open = nfs_server_list_open, |
1350 | .read = seq_read, | |
1351 | .llseek = seq_lseek, | |
1352 | .release = seq_release, | |
34b37235 | 1353 | .owner = THIS_MODULE, |
6aaca566 DH |
1354 | }; |
1355 | ||
1356 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1357 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1358 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1359 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1360 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1361 | ||
1362 | static struct seq_operations nfs_volume_list_ops = { | |
1363 | .start = nfs_volume_list_start, | |
1364 | .next = nfs_volume_list_next, | |
1365 | .stop = nfs_volume_list_stop, | |
1366 | .show = nfs_volume_list_show, | |
1367 | }; | |
1368 | ||
00977a59 | 1369 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1370 | .open = nfs_volume_list_open, |
1371 | .read = seq_read, | |
1372 | .llseek = seq_lseek, | |
1373 | .release = seq_release, | |
34b37235 | 1374 | .owner = THIS_MODULE, |
6aaca566 DH |
1375 | }; |
1376 | ||
1377 | /* | |
1378 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1379 | * we're dealing | |
1380 | */ | |
1381 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1382 | { | |
1383 | struct seq_file *m; | |
1384 | int ret; | |
1385 | ||
1386 | ret = seq_open(file, &nfs_server_list_ops); | |
1387 | if (ret < 0) | |
1388 | return ret; | |
1389 | ||
1390 | m = file->private_data; | |
1391 | m->private = PDE(inode)->data; | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * set up the iterator to start reading from the server list and return the first item | |
1398 | */ | |
1399 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1400 | { | |
6aaca566 DH |
1401 | /* lock the list against modification */ |
1402 | spin_lock(&nfs_client_lock); | |
259902ea | 1403 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1404 | } |
1405 | ||
1406 | /* | |
1407 | * move to next server | |
1408 | */ | |
1409 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1410 | { | |
259902ea | 1411 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1412 | } |
1413 | ||
1414 | /* | |
1415 | * clean up after reading from the transports list | |
1416 | */ | |
1417 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1418 | { | |
1419 | spin_unlock(&nfs_client_lock); | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * display a header line followed by a load of call lines | |
1424 | */ | |
1425 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1426 | { | |
1427 | struct nfs_client *clp; | |
1428 | ||
1429 | /* display header on line 1 */ | |
259902ea | 1430 | if (v == &nfs_client_list) { |
6aaca566 DH |
1431 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | /* display one transport per line on subsequent lines */ | |
1436 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1437 | ||
5d8515ca | 1438 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1439 | clp->rpc_ops->version, |
5d8515ca CL |
1440 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1441 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1442 | atomic_read(&clp->cl_count), |
1443 | clp->cl_hostname); | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1450 | */ | |
1451 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1452 | { | |
1453 | struct seq_file *m; | |
1454 | int ret; | |
1455 | ||
1456 | ret = seq_open(file, &nfs_volume_list_ops); | |
1457 | if (ret < 0) | |
1458 | return ret; | |
1459 | ||
1460 | m = file->private_data; | |
1461 | m->private = PDE(inode)->data; | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * set up the iterator to start reading from the volume list and return the first item | |
1468 | */ | |
1469 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1470 | { | |
6aaca566 DH |
1471 | /* lock the list against modification */ |
1472 | spin_lock(&nfs_client_lock); | |
259902ea | 1473 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1474 | } |
1475 | ||
1476 | /* | |
1477 | * move to next volume | |
1478 | */ | |
1479 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1480 | { | |
259902ea | 1481 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1482 | } |
1483 | ||
1484 | /* | |
1485 | * clean up after reading from the transports list | |
1486 | */ | |
1487 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1488 | { | |
1489 | spin_unlock(&nfs_client_lock); | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * display a header line followed by a load of call lines | |
1494 | */ | |
1495 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1496 | { | |
1497 | struct nfs_server *server; | |
1498 | struct nfs_client *clp; | |
1499 | char dev[8], fsid[17]; | |
1500 | ||
1501 | /* display header on line 1 */ | |
259902ea | 1502 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1503 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1504 | return 0; | |
1505 | } | |
1506 | /* display one transport per line on subsequent lines */ | |
1507 | server = list_entry(v, struct nfs_server, master_link); | |
1508 | clp = server->nfs_client; | |
1509 | ||
1510 | snprintf(dev, 8, "%u:%u", | |
1511 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1512 | ||
1513 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1514 | (unsigned long long) server->fsid.major, |
1515 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1516 | |
5d8515ca | 1517 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1518 | clp->rpc_ops->version, |
5d8515ca CL |
1519 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1520 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1521 | dev, |
1522 | fsid); | |
1523 | ||
1524 | return 0; | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * initialise the /proc/fs/nfsfs/ directory | |
1529 | */ | |
1530 | int __init nfs_fs_proc_init(void) | |
1531 | { | |
1532 | struct proc_dir_entry *p; | |
1533 | ||
36a5aeb8 | 1534 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1535 | if (!proc_fs_nfs) |
1536 | goto error_0; | |
1537 | ||
1538 | proc_fs_nfs->owner = THIS_MODULE; | |
1539 | ||
1540 | /* a file of servers with which we're dealing */ | |
34b37235 DL |
1541 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1542 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1543 | if (!p) |
1544 | goto error_1; | |
1545 | ||
6aaca566 | 1546 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1547 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1548 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1549 | if (!p) |
1550 | goto error_2; | |
6aaca566 DH |
1551 | return 0; |
1552 | ||
1553 | error_2: | |
1554 | remove_proc_entry("servers", proc_fs_nfs); | |
1555 | error_1: | |
36a5aeb8 | 1556 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1557 | error_0: |
1558 | return -ENOMEM; | |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * clean up the /proc/fs/nfsfs/ directory | |
1563 | */ | |
1564 | void nfs_fs_proc_exit(void) | |
1565 | { | |
1566 | remove_proc_entry("volumes", proc_fs_nfs); | |
1567 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1568 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1569 | } |
1570 | ||
1571 | #endif /* CONFIG_PROC_FS */ |