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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 | ||
86 | ||
87 | #ifdef CONFIG_NFS_V3_ACL | |
88 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
a613fa16 | 89 | static const struct rpc_version *nfsacl_version[] = { |
5006a76c DH |
90 | [3] = &nfsacl_version3, |
91 | }; | |
92 | ||
a613fa16 | 93 | const struct rpc_program nfsacl_program = { |
5006a76c DH |
94 | .name = "nfsacl", |
95 | .number = NFS_ACL_PROGRAM, | |
96 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
97 | .version = nfsacl_version, | |
98 | .stats = &nfsacl_rpcstat, | |
99 | }; | |
100 | #endif /* CONFIG_NFS_V3_ACL */ | |
101 | ||
ab7017a3 BS |
102 | static struct nfs_subversion *find_nfs_version(unsigned int version) |
103 | { | |
104 | struct nfs_subversion *nfs; | |
105 | spin_lock(&nfs_version_lock); | |
106 | ||
107 | list_for_each_entry(nfs, &nfs_versions, list) { | |
108 | if (nfs->rpc_ops->version == version) { | |
109 | spin_unlock(&nfs_version_lock); | |
110 | return nfs; | |
111 | } | |
112 | }; | |
113 | ||
114 | spin_unlock(&nfs_version_lock); | |
115 | return ERR_PTR(-EPROTONOSUPPORT);; | |
116 | } | |
117 | ||
118 | struct nfs_subversion *get_nfs_version(unsigned int version) | |
119 | { | |
120 | struct nfs_subversion *nfs = find_nfs_version(version); | |
121 | ||
122 | if (IS_ERR(nfs)) { | |
123 | mutex_lock(&nfs_version_mutex); | |
124 | request_module("nfs%d", version); | |
125 | nfs = find_nfs_version(version); | |
126 | mutex_unlock(&nfs_version_mutex); | |
127 | } | |
128 | ||
129 | if (!IS_ERR(nfs)) | |
130 | try_module_get(nfs->owner); | |
131 | return nfs; | |
132 | } | |
133 | ||
134 | void put_nfs_version(struct nfs_subversion *nfs) | |
135 | { | |
136 | module_put(nfs->owner); | |
137 | } | |
138 | ||
139 | void register_nfs_version(struct nfs_subversion *nfs) | |
140 | { | |
141 | spin_lock(&nfs_version_lock); | |
142 | ||
143 | list_add(&nfs->list, &nfs_versions); | |
144 | nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers; | |
145 | ||
146 | spin_unlock(&nfs_version_lock); | |
147 | } | |
148 | EXPORT_SYMBOL_GPL(register_nfs_version); | |
149 | ||
150 | void unregister_nfs_version(struct nfs_subversion *nfs) | |
151 | { | |
152 | spin_lock(&nfs_version_lock); | |
153 | ||
154 | nfs_version[nfs->rpc_ops->version] = NULL; | |
155 | list_del(&nfs->list); | |
156 | ||
157 | spin_unlock(&nfs_version_lock); | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(unregister_nfs_version); | |
160 | ||
161 | /* | |
162 | * Preload all configured NFS versions during module init. | |
163 | * This function should be edited after each protocol is converted, | |
164 | * and eventually removed. | |
165 | */ | |
166 | int __init nfs_register_versions(void) | |
167 | { | |
168 | int err = init_nfs_v2(); | |
169 | if (err) | |
170 | return err; | |
171 | ||
172 | err = init_nfs_v3(); | |
173 | if (err) | |
174 | return err; | |
175 | ||
176 | return init_nfs_v4(); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Remove each pre-loaded NFS version | |
181 | */ | |
182 | void nfs_unregister_versions(void) | |
183 | { | |
184 | exit_nfs_v2(); | |
185 | exit_nfs_v3(); | |
186 | exit_nfs_v4(); | |
187 | } | |
188 | ||
24c8dbbb DH |
189 | /* |
190 | * Allocate a shared client record | |
191 | * | |
192 | * Since these are allocated/deallocated very rarely, we don't | |
193 | * bother putting them in a slab cache... | |
194 | */ | |
6663ee7f | 195 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
196 | { |
197 | struct nfs_client *clp; | |
7c67db3a | 198 | struct rpc_cred *cred; |
a21bdd9b | 199 | int err = -ENOMEM; |
24c8dbbb DH |
200 | |
201 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
202 | goto error_0; | |
203 | ||
ab7017a3 BS |
204 | clp->cl_nfs_mod = cl_init->nfs_mod; |
205 | try_module_get(clp->cl_nfs_mod->owner); | |
206 | ||
207 | clp->rpc_ops = clp->cl_nfs_mod->rpc_ops; | |
40c55319 | 208 | |
24c8dbbb DH |
209 | atomic_set(&clp->cl_count, 1); |
210 | clp->cl_cons_state = NFS_CS_INITING; | |
211 | ||
6e4cffd7 CL |
212 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
213 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 214 | |
3a498026 | 215 | if (cl_init->hostname) { |
a21bdd9b | 216 | err = -ENOMEM; |
3a498026 | 217 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 218 | if (!clp->cl_hostname) |
71468513 | 219 | goto error_cleanup; |
24c8dbbb DH |
220 | } |
221 | ||
222 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
223 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
224 | ||
59dca3b2 | 225 | clp->cl_proto = cl_init->proto; |
73ea666c | 226 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 227 | |
68c97153 | 228 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
229 | if (!IS_ERR(cred)) |
230 | clp->cl_machine_cred = cred; | |
14727281 DH |
231 | nfs_fscache_get_client_cookie(clp); |
232 | ||
24c8dbbb DH |
233 | return clp; |
234 | ||
71468513 | 235 | error_cleanup: |
ab7017a3 | 236 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
237 | kfree(clp); |
238 | error_0: | |
a21bdd9b | 239 | return ERR_PTR(err); |
24c8dbbb DH |
240 | } |
241 | ||
5dd3177a | 242 | #ifdef CONFIG_NFS_V4 |
f4eecd5d | 243 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ |
28cd1b3f | 244 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 245 | { |
28cd1b3f SK |
246 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
247 | ||
248 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
249 | } |
250 | ||
251 | /* nfs_client_lock held */ | |
252 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
253 | { | |
73ea666c | 254 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 255 | |
f4eecd5d | 256 | if (clp->cl_cb_ident) |
28cd1b3f | 257 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
258 | } |
259 | ||
f7e8917a FI |
260 | static void pnfs_init_server(struct nfs_server *server) |
261 | { | |
262 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
263 | } | |
264 | ||
888ef2e3 | 265 | #else |
28cd1b3f | 266 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
267 | { |
268 | } | |
269 | ||
270 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
271 | { | |
272 | } | |
f7e8917a FI |
273 | |
274 | static void pnfs_init_server(struct nfs_server *server) | |
275 | { | |
276 | } | |
277 | ||
888ef2e3 | 278 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 279 | |
24c8dbbb DH |
280 | /* |
281 | * Destroy a shared client record | |
282 | */ | |
cdb7eced | 283 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 284 | { |
40c55319 | 285 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 286 | |
14727281 DH |
287 | nfs_fscache_release_client_cookie(clp); |
288 | ||
24c8dbbb DH |
289 | /* -EIO all pending I/O */ |
290 | if (!IS_ERR(clp->cl_rpcclient)) | |
291 | rpc_shutdown_client(clp->cl_rpcclient); | |
292 | ||
7c67db3a TM |
293 | if (clp->cl_machine_cred != NULL) |
294 | put_rpccred(clp->cl_machine_cred); | |
295 | ||
73ea666c | 296 | put_net(clp->cl_net); |
ab7017a3 | 297 | put_nfs_version(clp->cl_nfs_mod); |
24c8dbbb DH |
298 | kfree(clp->cl_hostname); |
299 | kfree(clp); | |
300 | ||
301 | dprintk("<-- nfs_free_client()\n"); | |
302 | } | |
303 | ||
304 | /* | |
305 | * Release a reference to a shared client record | |
306 | */ | |
307 | void nfs_put_client(struct nfs_client *clp) | |
308 | { | |
dc030858 SK |
309 | struct nfs_net *nn; |
310 | ||
27ba8512 DH |
311 | if (!clp) |
312 | return; | |
313 | ||
24c8dbbb | 314 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 315 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 316 | |
dc030858 | 317 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 318 | list_del(&clp->cl_share_link); |
f4eecd5d | 319 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 320 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb DH |
321 | |
322 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
323 | ||
cdb7eced | 324 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
325 | } |
326 | } | |
16b374ca | 327 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 328 | |
9082a5cc | 329 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
330 | /* |
331 | * Test if two ip6 socket addresses refer to the same socket by | |
332 | * comparing relevant fields. The padding bytes specifically, are not | |
333 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
334 | * and sin6_scope_id is only compared if the address is "link local" | |
335 | * because "link local" addresses need only be unique to a specific | |
336 | * link. Conversely, ordinary unicast addresses might have different | |
337 | * sin6_scope_id. | |
338 | * | |
339 | * The caller should ensure both socket addresses are AF_INET6. | |
340 | */ | |
3c8c45df CL |
341 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
342 | const struct sockaddr *sa2) | |
9f4c899c | 343 | { |
3c8c45df CL |
344 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
345 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 346 | |
b9dd3abb | 347 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 348 | return 0; |
b9dd3abb MJ |
349 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
350 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 351 | |
b9dd3abb | 352 | return 1; |
3b0d3f93 | 353 | } |
3c8c45df CL |
354 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
355 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
356 | const struct sockaddr *sa2) | |
9f4c899c TM |
357 | { |
358 | return 0; | |
359 | } | |
9082a5cc | 360 | #endif |
3b0d3f93 | 361 | |
d7371c41 ID |
362 | /* |
363 | * Test if two ip4 socket addresses refer to the same socket, by | |
364 | * comparing relevant fields. The padding bytes specifically, are | |
365 | * not compared. | |
366 | * | |
367 | * The caller should ensure both socket addresses are AF_INET. | |
368 | */ | |
3c8c45df CL |
369 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
370 | const struct sockaddr *sa2) | |
371 | { | |
372 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
373 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
374 | ||
375 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
376 | } | |
377 | ||
378 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
379 | const struct sockaddr *sa2) | |
380 | { | |
381 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
382 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
383 | ||
384 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
385 | (sin1->sin6_port == sin2->sin6_port); | |
386 | } | |
387 | ||
9f4c899c TM |
388 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
389 | const struct sockaddr *sa2) | |
d7371c41 | 390 | { |
3c8c45df CL |
391 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
392 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 393 | |
3c8c45df CL |
394 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
395 | (sin1->sin_port == sin2->sin_port); | |
396 | } | |
397 | ||
4b7c8dd2 | 398 | #if defined(CONFIG_NFS_V4_1) |
3c8c45df CL |
399 | /* |
400 | * Test if two socket addresses represent the same actual socket, | |
401 | * by comparing (only) relevant fields, excluding the port number. | |
402 | */ | |
fcf10398 BS |
403 | int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
404 | const struct sockaddr *sa2) | |
3c8c45df CL |
405 | { |
406 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 407 | return 0; |
3c8c45df CL |
408 | |
409 | switch (sa1->sa_family) { | |
410 | case AF_INET: | |
411 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
412 | case AF_INET6: | |
413 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
414 | } | |
415 | return 0; | |
d7371c41 | 416 | } |
4b7c8dd2 | 417 | #endif /* CONFIG_NFS_V4_1 */ |
d7371c41 | 418 | |
d7371c41 ID |
419 | /* |
420 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 421 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
422 | */ |
423 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
424 | const struct sockaddr *sa2) | |
425 | { | |
426 | if (sa1->sa_family != sa2->sa_family) | |
427 | return 0; | |
428 | ||
429 | switch (sa1->sa_family) { | |
430 | case AF_INET: | |
9f4c899c | 431 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 432 | case AF_INET6: |
9f4c899c | 433 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
434 | } |
435 | return 0; | |
436 | } | |
437 | ||
24c8dbbb | 438 | /* |
c81468a1 TM |
439 | * Find an nfs_client on the list that matches the initialisation data |
440 | * that is supplied. | |
24c8dbbb | 441 | */ |
c81468a1 | 442 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
443 | { |
444 | struct nfs_client *clp; | |
d7371c41 | 445 | const struct sockaddr *sap = data->addr; |
6b13168b | 446 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 447 | |
6b13168b | 448 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 449 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
450 | /* Don't match clients that failed to initialise properly */ |
451 | if (clp->cl_cons_state < 0) | |
452 | continue; | |
453 | ||
454 | /* Different NFS versions cannot share the same nfs_client */ | |
ab7017a3 | 455 | if (clp->rpc_ops != data->nfs_mod->rpc_ops) |
c81468a1 TM |
456 | continue; |
457 | ||
59dca3b2 TM |
458 | if (clp->cl_proto != data->proto) |
459 | continue; | |
5aae4a9a BH |
460 | /* Match nfsv4 minorversion */ |
461 | if (clp->cl_minorversion != data->minorversion) | |
462 | continue; | |
c81468a1 | 463 | /* Match the full socket address */ |
d7371c41 | 464 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
465 | continue; |
466 | ||
467 | atomic_inc(&clp->cl_count); | |
468 | return clp; | |
13bbc06a | 469 | } |
c81468a1 | 470 | return NULL; |
24c8dbbb DH |
471 | } |
472 | ||
4697bd5e TM |
473 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
474 | { | |
475 | return clp->cl_cons_state != NFS_CS_INITING; | |
476 | } | |
477 | ||
478 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
479 | { | |
480 | return wait_event_killable(nfs_client_active_wq, | |
481 | nfs_client_init_is_complete(clp)); | |
482 | } | |
483 | ||
f411703a CL |
484 | /* |
485 | * Found an existing client. Make sure it's ready before returning. | |
486 | */ | |
487 | static struct nfs_client * | |
488 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
489 | struct nfs_client *clp) | |
490 | { | |
491 | int error; | |
492 | ||
4697bd5e | 493 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
494 | if (error < 0) { |
495 | nfs_put_client(clp); | |
496 | return ERR_PTR(-ERESTARTSYS); | |
497 | } | |
498 | ||
499 | if (clp->cl_cons_state < NFS_CS_READY) { | |
500 | error = clp->cl_cons_state; | |
501 | nfs_put_client(clp); | |
502 | return ERR_PTR(error); | |
503 | } | |
504 | ||
54ac471c TM |
505 | smp_rmb(); |
506 | ||
f411703a CL |
507 | dprintk("<-- %s found nfs_client %p for %s\n", |
508 | __func__, clp, cl_init->hostname ?: ""); | |
509 | return clp; | |
510 | } | |
511 | ||
24c8dbbb DH |
512 | /* |
513 | * Look up a client by IP address and protocol version | |
514 | * - creates a new record if one doesn't yet exist | |
515 | */ | |
fcf10398 | 516 | struct nfs_client * |
45a52a02 AA |
517 | nfs_get_client(const struct nfs_client_initdata *cl_init, |
518 | const struct rpc_timeout *timeparms, | |
519 | const char *ip_addr, | |
4bf590e0 | 520 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
521 | { |
522 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 523 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
ab7017a3 | 524 | const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops; |
24c8dbbb | 525 | |
d7422c47 | 526 | dprintk("--> nfs_get_client(%s,v%u)\n", |
ab7017a3 | 527 | cl_init->hostname ?: "", rpc_ops->version); |
24c8dbbb DH |
528 | |
529 | /* see if the client already exists */ | |
530 | do { | |
dc030858 | 531 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 532 | |
c81468a1 | 533 | clp = nfs_match_client(cl_init); |
f411703a CL |
534 | if (clp) { |
535 | spin_unlock(&nn->nfs_client_lock); | |
536 | if (new) | |
cdb7eced | 537 | new->rpc_ops->free_client(new); |
f411703a CL |
538 | return nfs_found_client(cl_init, clp); |
539 | } | |
8cab4c39 CL |
540 | if (new) { |
541 | list_add(&new->cl_share_link, &nn->nfs_client_list); | |
542 | spin_unlock(&nn->nfs_client_lock); | |
4bf590e0 | 543 | new->cl_flags = cl_init->init_flags; |
ab7017a3 BS |
544 | return rpc_ops->init_client(new, timeparms, ip_addr, |
545 | authflavour); | |
8cab4c39 | 546 | } |
24c8dbbb | 547 | |
dc030858 | 548 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 549 | |
ab7017a3 | 550 | new = rpc_ops->alloc_client(cl_init); |
a21bdd9b | 551 | } while (!IS_ERR(new)); |
24c8dbbb | 552 | |
f411703a CL |
553 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
554 | cl_init->hostname ?: "", PTR_ERR(new)); | |
a21bdd9b | 555 | return new; |
24c8dbbb DH |
556 | } |
557 | ||
558 | /* | |
559 | * Mark a server as ready or failed | |
560 | */ | |
76db6d95 | 561 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 562 | { |
54ac471c | 563 | smp_wmb(); |
24c8dbbb DH |
564 | clp->cl_cons_state = state; |
565 | wake_up_all(&nfs_client_active_wq); | |
566 | } | |
5006a76c DH |
567 | |
568 | /* | |
569 | * Initialise the timeout values for a connection | |
570 | */ | |
fcf10398 | 571 | void nfs_init_timeout_values(struct rpc_timeout *to, int proto, |
5006a76c DH |
572 | unsigned int timeo, unsigned int retrans) |
573 | { | |
574 | to->to_initval = timeo * HZ / 10; | |
575 | to->to_retries = retrans; | |
5006a76c DH |
576 | |
577 | switch (proto) { | |
0896a725 | 578 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 579 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
580 | if (to->to_retries == 0) |
581 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 582 | if (to->to_initval == 0) |
259875ef | 583 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
584 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
585 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
586 | to->to_increment = to->to_initval; | |
587 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
588 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
589 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
590 | if (to->to_maxval < to->to_initval) | |
591 | to->to_maxval = to->to_initval; | |
5006a76c DH |
592 | to->to_exponential = 0; |
593 | break; | |
0896a725 | 594 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
595 | if (to->to_retries == 0) |
596 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 597 | if (!to->to_initval) |
259875ef | 598 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
599 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
600 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
601 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
602 | to->to_exponential = 1; | |
603 | break; | |
259875ef TM |
604 | default: |
605 | BUG(); | |
5006a76c DH |
606 | } |
607 | } | |
608 | ||
609 | /* | |
610 | * Create an RPC client handle | |
611 | */ | |
428360d7 BS |
612 | int nfs_create_rpc_client(struct nfs_client *clp, |
613 | const struct rpc_timeout *timeparms, | |
614 | rpc_authflavor_t flavor) | |
5006a76c | 615 | { |
5006a76c | 616 | struct rpc_clnt *clnt = NULL; |
41877d20 | 617 | struct rpc_create_args args = { |
73ea666c | 618 | .net = clp->cl_net, |
59dca3b2 | 619 | .protocol = clp->cl_proto, |
41877d20 | 620 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 621 | .addrsize = clp->cl_addrlen, |
33170233 | 622 | .timeout = timeparms, |
41877d20 CL |
623 | .servername = clp->cl_hostname, |
624 | .program = &nfs_program, | |
625 | .version = clp->rpc_ops->version, | |
626 | .authflavor = flavor, | |
627 | }; | |
5006a76c | 628 | |
4bf590e0 | 629 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 630 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
4bf590e0 | 631 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 CL |
632 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
633 | ||
5006a76c DH |
634 | if (!IS_ERR(clp->cl_rpcclient)) |
635 | return 0; | |
636 | ||
41877d20 | 637 | clnt = rpc_create(&args); |
5006a76c DH |
638 | if (IS_ERR(clnt)) { |
639 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 640 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
641 | return PTR_ERR(clnt); |
642 | } | |
643 | ||
5006a76c DH |
644 | clp->cl_rpcclient = clnt; |
645 | return 0; | |
646 | } | |
54ceac45 DH |
647 | |
648 | /* | |
649 | * Version 2 or 3 client destruction | |
650 | */ | |
651 | static void nfs_destroy_server(struct nfs_server *server) | |
652 | { | |
5eebde23 SJ |
653 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
654 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 655 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
656 | } |
657 | ||
658 | /* | |
659 | * Version 2 or 3 lockd setup | |
660 | */ | |
661 | static int nfs_start_lockd(struct nfs_server *server) | |
662 | { | |
9289e7f9 CL |
663 | struct nlm_host *host; |
664 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
665 | struct nlmclnt_initdata nlm_init = { |
666 | .hostname = clp->cl_hostname, | |
667 | .address = (struct sockaddr *)&clp->cl_addr, | |
668 | .addrlen = clp->cl_addrlen, | |
883bb163 | 669 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
670 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
671 | 1 : 0, | |
73ea666c | 672 | .net = clp->cl_net, |
883bb163 | 673 | }; |
54ceac45 | 674 | |
883bb163 | 675 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 676 | return 0; |
5eebde23 SJ |
677 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
678 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
679 | return 0; |
680 | ||
8a6e5deb TM |
681 | switch (clp->cl_proto) { |
682 | default: | |
683 | nlm_init.protocol = IPPROTO_TCP; | |
684 | break; | |
685 | case XPRT_TRANSPORT_UDP: | |
686 | nlm_init.protocol = IPPROTO_UDP; | |
687 | } | |
688 | ||
883bb163 | 689 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
690 | if (IS_ERR(host)) |
691 | return PTR_ERR(host); | |
692 | ||
693 | server->nlm_host = host; | |
694 | server->destroy = nfs_destroy_server; | |
695 | return 0; | |
54ceac45 DH |
696 | } |
697 | ||
698 | /* | |
699 | * Initialise an NFSv3 ACL client connection | |
700 | */ | |
701 | #ifdef CONFIG_NFS_V3_ACL | |
702 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
703 | { | |
40c55319 | 704 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
705 | goto out_noacl; |
706 | if (server->flags & NFS_MOUNT_NOACL) | |
707 | goto out_noacl; | |
708 | ||
709 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
710 | if (IS_ERR(server->client_acl)) | |
711 | goto out_noacl; | |
712 | ||
713 | /* No errors! Assume that Sun nfsacls are supported */ | |
714 | server->caps |= NFS_CAP_ACLS; | |
715 | return; | |
716 | ||
717 | out_noacl: | |
718 | server->caps &= ~NFS_CAP_ACLS; | |
719 | } | |
720 | #else | |
721 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
722 | { | |
723 | server->flags &= ~NFS_MOUNT_NOACL; | |
724 | server->caps &= ~NFS_CAP_ACLS; | |
725 | } | |
726 | #endif | |
727 | ||
728 | /* | |
729 | * Create a general RPC client | |
730 | */ | |
fcf10398 | 731 | int nfs_init_server_rpcclient(struct nfs_server *server, |
33170233 TM |
732 | const struct rpc_timeout *timeo, |
733 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
734 | { |
735 | struct nfs_client *clp = server->nfs_client; | |
736 | ||
737 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
738 | if (IS_ERR(server->client)) { | |
3110ff80 | 739 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
740 | return PTR_ERR(server->client); |
741 | } | |
742 | ||
33170233 TM |
743 | memcpy(&server->client->cl_timeout_default, |
744 | timeo, | |
745 | sizeof(server->client->cl_timeout_default)); | |
746 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
747 | ||
54ceac45 DH |
748 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
749 | struct rpc_auth *auth; | |
750 | ||
751 | auth = rpcauth_create(pseudoflavour, server->client); | |
752 | if (IS_ERR(auth)) { | |
3110ff80 | 753 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
754 | return PTR_ERR(auth); |
755 | } | |
756 | } | |
757 | server->client->cl_softrtry = 0; | |
758 | if (server->flags & NFS_MOUNT_SOFT) | |
759 | server->client->cl_softrtry = 1; | |
760 | ||
54ceac45 DH |
761 | return 0; |
762 | } | |
763 | ||
8cab4c39 CL |
764 | /** |
765 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
766 | * | |
767 | * @clp: nfs_client to initialise | |
768 | * @timeparms: timeout parameters for underlying RPC transport | |
769 | * @ip_addr: IP presentation address (not used) | |
770 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
771 | * |
772 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 773 | */ |
8cab4c39 CL |
774 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
775 | const struct rpc_timeout *timeparms, | |
4bf590e0 | 776 | const char *ip_addr, rpc_authflavor_t authflavour) |
54ceac45 | 777 | { |
54ceac45 DH |
778 | int error; |
779 | ||
780 | if (clp->cl_cons_state == NFS_CS_READY) { | |
781 | /* the client is already initialised */ | |
782 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 783 | return clp; |
54ceac45 DH |
784 | } |
785 | ||
54ceac45 DH |
786 | /* |
787 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
788 | * - RFC 2623, sec 2.3.2 | |
789 | */ | |
4bf590e0 | 790 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
791 | if (error < 0) |
792 | goto error; | |
793 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 794 | return clp; |
54ceac45 DH |
795 | |
796 | error: | |
797 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 798 | nfs_put_client(clp); |
54ceac45 | 799 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 800 | return ERR_PTR(error); |
54ceac45 DH |
801 | } |
802 | ||
803 | /* | |
804 | * Create a version 2 or 3 client | |
805 | */ | |
2283f8d6 | 806 | static int nfs_init_server(struct nfs_server *server, |
ab7017a3 BS |
807 | const struct nfs_parsed_mount_data *data, |
808 | struct nfs_subversion *nfs_mod) | |
54ceac45 | 809 | { |
3a498026 TM |
810 | struct nfs_client_initdata cl_init = { |
811 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 812 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 813 | .addrlen = data->nfs_server.addrlen, |
ab7017a3 | 814 | .nfs_mod = nfs_mod, |
59dca3b2 | 815 | .proto = data->nfs_server.protocol, |
e50a7a1a | 816 | .net = data->net, |
3a498026 | 817 | }; |
33170233 | 818 | struct rpc_timeout timeparms; |
54ceac45 | 819 | struct nfs_client *clp; |
3a498026 | 820 | int error; |
54ceac45 DH |
821 | |
822 | dprintk("--> nfs_init_server()\n"); | |
823 | ||
45a52a02 AA |
824 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
825 | data->timeo, data->retrans); | |
4bf590e0 CL |
826 | if (data->flags & NFS_MOUNT_NORESVPORT) |
827 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 828 | |
54ceac45 | 829 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 830 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
831 | if (IS_ERR(clp)) { |
832 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
833 | return PTR_ERR(clp); | |
834 | } | |
835 | ||
54ceac45 DH |
836 | server->nfs_client = clp; |
837 | ||
838 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 839 | server->flags = data->flags; |
b797cac7 | 840 | server->options = data->options; |
62ab460c TM |
841 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
842 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
3a1556e8 | 843 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; |
54ceac45 DH |
844 | |
845 | if (data->rsize) | |
846 | server->rsize = nfs_block_size(data->rsize, NULL); | |
847 | if (data->wsize) | |
848 | server->wsize = nfs_block_size(data->wsize, NULL); | |
849 | ||
850 | server->acregmin = data->acregmin * HZ; | |
851 | server->acregmax = data->acregmax * HZ; | |
852 | server->acdirmin = data->acdirmin * HZ; | |
853 | server->acdirmax = data->acdirmax * HZ; | |
854 | ||
855 | /* Start lockd here, before we might error out */ | |
856 | error = nfs_start_lockd(server); | |
857 | if (error < 0) | |
858 | goto error; | |
859 | ||
f22d6d79 CL |
860 | server->port = data->nfs_server.port; |
861 | ||
33170233 | 862 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
863 | if (error < 0) |
864 | goto error; | |
865 | ||
3f8400d1 CL |
866 | /* Preserve the values of mount_server-related mount options */ |
867 | if (data->mount_server.addrlen) { | |
868 | memcpy(&server->mountd_address, &data->mount_server.address, | |
869 | data->mount_server.addrlen); | |
870 | server->mountd_addrlen = data->mount_server.addrlen; | |
871 | } | |
872 | server->mountd_version = data->mount_server.version; | |
873 | server->mountd_port = data->mount_server.port; | |
874 | server->mountd_protocol = data->mount_server.protocol; | |
875 | ||
54ceac45 DH |
876 | server->namelen = data->namlen; |
877 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
878 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
879 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
880 | return 0; | |
881 | ||
882 | error: | |
883 | server->nfs_client = NULL; | |
884 | nfs_put_client(clp); | |
885 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
886 | return error; | |
887 | } | |
888 | ||
889 | /* | |
890 | * Load up the server record from information gained in an fsinfo record | |
891 | */ | |
738fd0f3 BH |
892 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
893 | struct nfs_fh *mntfh, | |
894 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
895 | { |
896 | unsigned long max_rpc_payload; | |
897 | ||
898 | /* Work out a lot of parameters */ | |
899 | if (server->rsize == 0) | |
900 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
901 | if (server->wsize == 0) | |
902 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
903 | ||
904 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
905 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
906 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
907 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
908 | ||
909 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
910 | if (server->rsize > max_rpc_payload) | |
911 | server->rsize = max_rpc_payload; | |
912 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
913 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
914 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 915 | |
d993831f | 916 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
917 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
918 | ||
919 | if (server->wsize > max_rpc_payload) | |
920 | server->wsize = max_rpc_payload; | |
921 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
922 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
923 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 924 | server->pnfs_blksize = fsinfo->blksize; |
85e174ba | 925 | |
54ceac45 DH |
926 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
927 | ||
928 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
929 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
930 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
931 | if (server->dtsize > server->rsize) |
932 | server->dtsize = server->rsize; | |
933 | ||
934 | if (server->flags & NFS_MOUNT_NOAC) { | |
935 | server->acregmin = server->acregmax = 0; | |
936 | server->acdirmin = server->acdirmax = 0; | |
937 | } | |
938 | ||
939 | server->maxfilesize = fsinfo->maxfilesize; | |
940 | ||
6b96724e RL |
941 | server->time_delta = fsinfo->time_delta; |
942 | ||
54ceac45 DH |
943 | /* We're airborne Set socket buffersize */ |
944 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
945 | } | |
946 | ||
947 | /* | |
948 | * Probe filesystem information, including the FSID on v2/v3 | |
949 | */ | |
fcf10398 | 950 | int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) |
54ceac45 DH |
951 | { |
952 | struct nfs_fsinfo fsinfo; | |
953 | struct nfs_client *clp = server->nfs_client; | |
954 | int error; | |
955 | ||
956 | dprintk("--> nfs_probe_fsinfo()\n"); | |
957 | ||
958 | if (clp->rpc_ops->set_capabilities != NULL) { | |
959 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
960 | if (error < 0) | |
961 | goto out_error; | |
962 | } | |
963 | ||
964 | fsinfo.fattr = fattr; | |
85e174ba | 965 | fsinfo.layouttype = 0; |
54ceac45 DH |
966 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
967 | if (error < 0) | |
968 | goto out_error; | |
969 | ||
738fd0f3 | 970 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
971 | |
972 | /* Get some general file system info */ | |
973 | if (server->namelen == 0) { | |
974 | struct nfs_pathconf pathinfo; | |
975 | ||
976 | pathinfo.fattr = fattr; | |
977 | nfs_fattr_init(fattr); | |
978 | ||
979 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
980 | server->namelen = pathinfo.max_namelen; | |
981 | } | |
982 | ||
983 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
984 | return 0; | |
985 | ||
986 | out_error: | |
987 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
988 | return error; | |
989 | } | |
990 | ||
991 | /* | |
992 | * Copy useful information when duplicating a server record | |
993 | */ | |
fcf10398 | 994 | void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) |
54ceac45 DH |
995 | { |
996 | target->flags = source->flags; | |
356e76b8 CL |
997 | target->rsize = source->rsize; |
998 | target->wsize = source->wsize; | |
54ceac45 DH |
999 | target->acregmin = source->acregmin; |
1000 | target->acregmax = source->acregmax; | |
1001 | target->acdirmin = source->acdirmin; | |
1002 | target->acdirmax = source->acdirmax; | |
1003 | target->caps = source->caps; | |
2df54806 | 1004 | target->options = source->options; |
54ceac45 DH |
1005 | } |
1006 | ||
fcf10398 | 1007 | void nfs_server_insert_lists(struct nfs_server *server) |
fca5238e CL |
1008 | { |
1009 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 1010 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 1011 | |
dc030858 | 1012 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 1013 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 1014 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 1015 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 1016 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
1017 | |
1018 | } | |
1019 | ||
1020 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1021 | { | |
d3b4c9d7 | 1022 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 1023 | struct nfs_net *nn; |
d3b4c9d7 | 1024 | |
4c03ae4a TM |
1025 | if (clp == NULL) |
1026 | return; | |
73ea666c | 1027 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 1028 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 1029 | list_del_rcu(&server->client_link); |
4c03ae4a | 1030 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 1031 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 1032 | list_del(&server->master_link); |
dc030858 | 1033 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
1034 | |
1035 | synchronize_rcu(); | |
1036 | } | |
1037 | ||
54ceac45 DH |
1038 | /* |
1039 | * Allocate and initialise a server record | |
1040 | */ | |
fcf10398 | 1041 | struct nfs_server *nfs_alloc_server(void) |
54ceac45 DH |
1042 | { |
1043 | struct nfs_server *server; | |
1044 | ||
1045 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1046 | if (!server) | |
1047 | return NULL; | |
1048 | ||
1049 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1050 | ||
1051 | /* Zero out the NFS state stuff */ | |
1052 | INIT_LIST_HEAD(&server->client_link); | |
1053 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1054 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1055 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1056 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1057 | |
ef818a28 SD |
1058 | atomic_set(&server->active, 0); |
1059 | ||
54ceac45 DH |
1060 | server->io_stats = nfs_alloc_iostats(); |
1061 | if (!server->io_stats) { | |
1062 | kfree(server); | |
1063 | return NULL; | |
1064 | } | |
1065 | ||
48d07649 JA |
1066 | if (bdi_init(&server->backing_dev_info)) { |
1067 | nfs_free_iostats(server->io_stats); | |
1068 | kfree(server); | |
1069 | return NULL; | |
1070 | } | |
1071 | ||
9157c31d | 1072 | ida_init(&server->openowner_id); |
d2d7ce28 | 1073 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1074 | pnfs_init_server(server); |
1075 | ||
54ceac45 DH |
1076 | return server; |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Free up a server record | |
1081 | */ | |
1082 | void nfs_free_server(struct nfs_server *server) | |
1083 | { | |
1084 | dprintk("--> nfs_free_server()\n"); | |
1085 | ||
fca5238e | 1086 | nfs_server_remove_lists(server); |
54ceac45 DH |
1087 | |
1088 | if (server->destroy != NULL) | |
1089 | server->destroy(server); | |
5cef338b TM |
1090 | |
1091 | if (!IS_ERR(server->client_acl)) | |
1092 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1093 | if (!IS_ERR(server->client)) |
1094 | rpc_shutdown_client(server->client); | |
1095 | ||
1096 | nfs_put_client(server->nfs_client); | |
1097 | ||
d2d7ce28 | 1098 | ida_destroy(&server->lockowner_id); |
9157c31d | 1099 | ida_destroy(&server->openowner_id); |
54ceac45 | 1100 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1101 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1102 | kfree(server); |
1103 | nfs_release_automount_timer(); | |
1104 | dprintk("<-- nfs_free_server()\n"); | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Create a version 2 or 3 volume record | |
1109 | * - keyed on server and FSID | |
1110 | */ | |
2283f8d6 | 1111 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
ab7017a3 BS |
1112 | struct nfs_fh *mntfh, |
1113 | struct nfs_subversion *nfs_mod) | |
54ceac45 DH |
1114 | { |
1115 | struct nfs_server *server; | |
fbca779a | 1116 | struct nfs_fattr *fattr; |
54ceac45 DH |
1117 | int error; |
1118 | ||
1119 | server = nfs_alloc_server(); | |
1120 | if (!server) | |
1121 | return ERR_PTR(-ENOMEM); | |
1122 | ||
fbca779a TM |
1123 | error = -ENOMEM; |
1124 | fattr = nfs_alloc_fattr(); | |
1125 | if (fattr == NULL) | |
1126 | goto error; | |
1127 | ||
54ceac45 | 1128 | /* Get a client representation */ |
ab7017a3 | 1129 | error = nfs_init_server(server, data, nfs_mod); |
54ceac45 DH |
1130 | if (error < 0) |
1131 | goto error; | |
1132 | ||
1133 | BUG_ON(!server->nfs_client); | |
1134 | BUG_ON(!server->nfs_client->rpc_ops); | |
1135 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1136 | ||
1137 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1138 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1139 | if (error < 0) |
1140 | goto error; | |
54af3bb5 TM |
1141 | if (server->nfs_client->rpc_ops->version == 3) { |
1142 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1143 | server->namelen = NFS3_MAXNAMLEN; | |
1144 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1145 | server->caps |= NFS_CAP_READDIRPLUS; | |
1146 | } else { | |
1147 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1148 | server->namelen = NFS2_MAXNAMLEN; | |
1149 | } | |
1150 | ||
fbca779a TM |
1151 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1152 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1153 | if (error < 0) { |
1154 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1155 | goto error; | |
1156 | } | |
1157 | } | |
fbca779a | 1158 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1159 | |
6daabf1b DH |
1160 | dprintk("Server FSID: %llx:%llx\n", |
1161 | (unsigned long long) server->fsid.major, | |
1162 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1163 | |
fca5238e | 1164 | nfs_server_insert_lists(server); |
54ceac45 | 1165 | server->mount_time = jiffies; |
fbca779a | 1166 | nfs_free_fattr(fattr); |
54ceac45 DH |
1167 | return server; |
1168 | ||
1169 | error: | |
fbca779a | 1170 | nfs_free_fattr(fattr); |
54ceac45 DH |
1171 | nfs_free_server(server); |
1172 | return ERR_PTR(error); | |
1173 | } | |
1174 | ||
54ceac45 DH |
1175 | /* |
1176 | * Clone an NFS2, NFS3 or NFS4 server record | |
1177 | */ | |
1178 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1179 | struct nfs_fh *fh, | |
7e6eb683 BS |
1180 | struct nfs_fattr *fattr, |
1181 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1182 | { |
1183 | struct nfs_server *server; | |
fbca779a | 1184 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1185 | int error; |
1186 | ||
1187 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1188 | (unsigned long long) fattr->fsid.major, |
1189 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1190 | |
1191 | server = nfs_alloc_server(); | |
1192 | if (!server) | |
1193 | return ERR_PTR(-ENOMEM); | |
1194 | ||
fbca779a TM |
1195 | error = -ENOMEM; |
1196 | fattr_fsinfo = nfs_alloc_fattr(); | |
1197 | if (fattr_fsinfo == NULL) | |
1198 | goto out_free_server; | |
1199 | ||
54ceac45 DH |
1200 | /* Copy data from the source */ |
1201 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1202 | server->destroy = source->destroy; |
54ceac45 DH |
1203 | atomic_inc(&server->nfs_client->cl_count); |
1204 | nfs_server_copy_userdata(server, source); | |
1205 | ||
1206 | server->fsid = fattr->fsid; | |
1207 | ||
33170233 TM |
1208 | error = nfs_init_server_rpcclient(server, |
1209 | source->client->cl_timeout, | |
7e6eb683 | 1210 | flavor); |
54ceac45 DH |
1211 | if (error < 0) |
1212 | goto out_free_server; | |
1213 | if (!IS_ERR(source->client_acl)) | |
1214 | nfs_init_server_aclclient(server); | |
1215 | ||
1216 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1217 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1218 | if (error < 0) |
1219 | goto out_free_server; | |
1220 | ||
54af3bb5 TM |
1221 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1222 | server->namelen = NFS4_MAXNAMLEN; | |
1223 | ||
54ceac45 | 1224 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1225 | (unsigned long long) server->fsid.major, |
1226 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1227 | |
1228 | error = nfs_start_lockd(server); | |
1229 | if (error < 0) | |
1230 | goto out_free_server; | |
1231 | ||
fca5238e | 1232 | nfs_server_insert_lists(server); |
54ceac45 DH |
1233 | server->mount_time = jiffies; |
1234 | ||
fbca779a | 1235 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1236 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1237 | return server; | |
1238 | ||
1239 | out_free_server: | |
fbca779a | 1240 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1241 | nfs_free_server(server); |
1242 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1243 | return ERR_PTR(error); | |
1244 | } | |
6aaca566 | 1245 | |
6b13168b SK |
1246 | void nfs_clients_init(struct net *net) |
1247 | { | |
1248 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1249 | ||
1250 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1251 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
28cd1b3f SK |
1252 | #ifdef CONFIG_NFS_V4 |
1253 | idr_init(&nn->cb_ident_idr); | |
1254 | #endif | |
4c03ae4a | 1255 | spin_lock_init(&nn->nfs_client_lock); |
f092075d | 1256 | nn->boot_time = CURRENT_TIME; |
6b13168b SK |
1257 | } |
1258 | ||
6aaca566 DH |
1259 | #ifdef CONFIG_PROC_FS |
1260 | static struct proc_dir_entry *proc_fs_nfs; | |
1261 | ||
1262 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1263 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1264 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1265 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1266 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1267 | ||
88e9d34c | 1268 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1269 | .start = nfs_server_list_start, |
1270 | .next = nfs_server_list_next, | |
1271 | .stop = nfs_server_list_stop, | |
1272 | .show = nfs_server_list_show, | |
1273 | }; | |
1274 | ||
00977a59 | 1275 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1276 | .open = nfs_server_list_open, |
1277 | .read = seq_read, | |
1278 | .llseek = seq_lseek, | |
1279 | .release = seq_release, | |
34b37235 | 1280 | .owner = THIS_MODULE, |
6aaca566 DH |
1281 | }; |
1282 | ||
1283 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1284 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1285 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1286 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1287 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1288 | ||
88e9d34c | 1289 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1290 | .start = nfs_volume_list_start, |
1291 | .next = nfs_volume_list_next, | |
1292 | .stop = nfs_volume_list_stop, | |
1293 | .show = nfs_volume_list_show, | |
1294 | }; | |
1295 | ||
00977a59 | 1296 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1297 | .open = nfs_volume_list_open, |
1298 | .read = seq_read, | |
1299 | .llseek = seq_lseek, | |
1300 | .release = seq_release, | |
34b37235 | 1301 | .owner = THIS_MODULE, |
6aaca566 DH |
1302 | }; |
1303 | ||
1304 | /* | |
1305 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1306 | * we're dealing | |
1307 | */ | |
1308 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1309 | { | |
1310 | struct seq_file *m; | |
1311 | int ret; | |
6b13168b SK |
1312 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1313 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1314 | |
1315 | ret = seq_open(file, &nfs_server_list_ops); | |
1316 | if (ret < 0) | |
1317 | return ret; | |
1318 | ||
1319 | m = file->private_data; | |
6b13168b | 1320 | m->private = net; |
6aaca566 DH |
1321 | |
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * set up the iterator to start reading from the server list and return the first item | |
1327 | */ | |
1328 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1329 | { | |
6b13168b SK |
1330 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1331 | ||
6aaca566 | 1332 | /* lock the list against modification */ |
dc030858 | 1333 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1334 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1335 | } |
1336 | ||
1337 | /* | |
1338 | * move to next server | |
1339 | */ | |
1340 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1341 | { | |
6b13168b SK |
1342 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1343 | ||
1344 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1345 | } |
1346 | ||
1347 | /* | |
1348 | * clean up after reading from the transports list | |
1349 | */ | |
1350 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1351 | { | |
dc030858 SK |
1352 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1353 | ||
1354 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1355 | } |
1356 | ||
1357 | /* | |
1358 | * display a header line followed by a load of call lines | |
1359 | */ | |
1360 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1361 | { | |
1362 | struct nfs_client *clp; | |
6b13168b | 1363 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1364 | |
1365 | /* display header on line 1 */ | |
6b13168b | 1366 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1367 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | /* display one transport per line on subsequent lines */ | |
1372 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1373 | ||
940aab49 MN |
1374 | /* Check if the client is initialized */ |
1375 | if (clp->cl_cons_state != NFS_CS_READY) | |
1376 | return 0; | |
1377 | ||
2446ab60 | 1378 | rcu_read_lock(); |
5d8515ca | 1379 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1380 | clp->rpc_ops->version, |
5d8515ca CL |
1381 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1382 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1383 | atomic_read(&clp->cl_count), |
1384 | clp->cl_hostname); | |
2446ab60 | 1385 | rcu_read_unlock(); |
6aaca566 DH |
1386 | |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1392 | */ | |
1393 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1394 | { | |
1395 | struct seq_file *m; | |
1396 | int ret; | |
c25d32b2 SK |
1397 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1398 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1399 | |
1400 | ret = seq_open(file, &nfs_volume_list_ops); | |
1401 | if (ret < 0) | |
1402 | return ret; | |
1403 | ||
1404 | m = file->private_data; | |
c25d32b2 | 1405 | m->private = net; |
6aaca566 DH |
1406 | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * set up the iterator to start reading from the volume list and return the first item | |
1412 | */ | |
1413 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1414 | { | |
c25d32b2 SK |
1415 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1416 | ||
6aaca566 | 1417 | /* lock the list against modification */ |
dc030858 | 1418 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 1419 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
1420 | } |
1421 | ||
1422 | /* | |
1423 | * move to next volume | |
1424 | */ | |
1425 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1426 | { | |
c25d32b2 SK |
1427 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1428 | ||
1429 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
1430 | } |
1431 | ||
1432 | /* | |
1433 | * clean up after reading from the transports list | |
1434 | */ | |
1435 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1436 | { | |
dc030858 SK |
1437 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1438 | ||
1439 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1440 | } |
1441 | ||
1442 | /* | |
1443 | * display a header line followed by a load of call lines | |
1444 | */ | |
1445 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1446 | { | |
1447 | struct nfs_server *server; | |
1448 | struct nfs_client *clp; | |
1449 | char dev[8], fsid[17]; | |
c25d32b2 | 1450 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1451 | |
1452 | /* display header on line 1 */ | |
c25d32b2 | 1453 | if (v == &nn->nfs_volume_list) { |
5d1acff1 | 1454 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1455 | return 0; |
1456 | } | |
1457 | /* display one transport per line on subsequent lines */ | |
1458 | server = list_entry(v, struct nfs_server, master_link); | |
1459 | clp = server->nfs_client; | |
1460 | ||
1461 | snprintf(dev, 8, "%u:%u", | |
1462 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1463 | ||
1464 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1465 | (unsigned long long) server->fsid.major, |
1466 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1467 | |
2446ab60 | 1468 | rcu_read_lock(); |
5d1acff1 | 1469 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1470 | clp->rpc_ops->version, |
5d8515ca CL |
1471 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1472 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1473 | dev, |
5d1acff1 DH |
1474 | fsid, |
1475 | nfs_server_fscache_state(server)); | |
2446ab60 | 1476 | rcu_read_unlock(); |
6aaca566 DH |
1477 | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * initialise the /proc/fs/nfsfs/ directory | |
1483 | */ | |
1484 | int __init nfs_fs_proc_init(void) | |
1485 | { | |
1486 | struct proc_dir_entry *p; | |
1487 | ||
36a5aeb8 | 1488 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1489 | if (!proc_fs_nfs) |
1490 | goto error_0; | |
1491 | ||
6aaca566 | 1492 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1493 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1494 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1495 | if (!p) |
1496 | goto error_1; | |
1497 | ||
6aaca566 | 1498 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1499 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1500 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1501 | if (!p) |
1502 | goto error_2; | |
6aaca566 DH |
1503 | return 0; |
1504 | ||
1505 | error_2: | |
1506 | remove_proc_entry("servers", proc_fs_nfs); | |
1507 | error_1: | |
36a5aeb8 | 1508 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1509 | error_0: |
1510 | return -ENOMEM; | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * clean up the /proc/fs/nfsfs/ directory | |
1515 | */ | |
1516 | void nfs_fs_proc_exit(void) | |
1517 | { | |
1518 | remove_proc_entry("volumes", proc_fs_nfs); | |
1519 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1520 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1521 | } |
1522 | ||
1523 | #endif /* CONFIG_PROC_FS */ |