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> | |
26 | #include <linux/nfs_fs.h> | |
27 | #include <linux/nfs_mount.h> | |
28 | #include <linux/nfs4_mount.h> | |
29 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
30 | #include <linux/seq_file.h> |
31 | #include <linux/mount.h> | |
32 | #include <linux/nfs_idmap.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/inet.h> | |
35 | #include <linux/nfs_xdr.h> | |
36 | ||
37 | #include <asm/system.h> | |
38 | ||
39 | #include "nfs4_fs.h" | |
40 | #include "callback.h" | |
41 | #include "delegation.h" | |
42 | #include "iostat.h" | |
43 | #include "internal.h" | |
44 | ||
45 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
46 | ||
47 | static DEFINE_SPINLOCK(nfs_client_lock); | |
48 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 49 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
50 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
51 | ||
5006a76c DH |
52 | /* |
53 | * RPC cruft for NFS | |
54 | */ | |
55 | static struct rpc_version *nfs_version[5] = { | |
56 | [2] = &nfs_version2, | |
57 | #ifdef CONFIG_NFS_V3 | |
58 | [3] = &nfs_version3, | |
59 | #endif | |
60 | #ifdef CONFIG_NFS_V4 | |
61 | [4] = &nfs_version4, | |
62 | #endif | |
63 | }; | |
64 | ||
65 | struct rpc_program nfs_program = { | |
66 | .name = "nfs", | |
67 | .number = NFS_PROGRAM, | |
68 | .nrvers = ARRAY_SIZE(nfs_version), | |
69 | .version = nfs_version, | |
70 | .stats = &nfs_rpcstat, | |
71 | .pipe_dir_name = "/nfs", | |
72 | }; | |
73 | ||
74 | struct rpc_stat nfs_rpcstat = { | |
75 | .program = &nfs_program | |
76 | }; | |
77 | ||
78 | ||
79 | #ifdef CONFIG_NFS_V3_ACL | |
80 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
81 | static struct rpc_version * nfsacl_version[] = { | |
82 | [3] = &nfsacl_version3, | |
83 | }; | |
84 | ||
85 | struct rpc_program nfsacl_program = { | |
86 | .name = "nfsacl", | |
87 | .number = NFS_ACL_PROGRAM, | |
88 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
89 | .version = nfsacl_version, | |
90 | .stats = &nfsacl_rpcstat, | |
91 | }; | |
92 | #endif /* CONFIG_NFS_V3_ACL */ | |
93 | ||
24c8dbbb DH |
94 | /* |
95 | * Allocate a shared client record | |
96 | * | |
97 | * Since these are allocated/deallocated very rarely, we don't | |
98 | * bother putting them in a slab cache... | |
99 | */ | |
100 | static struct nfs_client *nfs_alloc_client(const char *hostname, | |
101 | const struct sockaddr_in *addr, | |
102 | int nfsversion) | |
103 | { | |
104 | struct nfs_client *clp; | |
24c8dbbb DH |
105 | |
106 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
107 | goto error_0; | |
108 | ||
24c8dbbb DH |
109 | if (nfsversion == 4) { |
110 | if (nfs_callback_up() < 0) | |
111 | goto error_2; | |
112 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
113 | } | |
114 | ||
115 | atomic_set(&clp->cl_count, 1); | |
116 | clp->cl_cons_state = NFS_CS_INITING; | |
117 | ||
118 | clp->cl_nfsversion = nfsversion; | |
119 | memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr)); | |
120 | ||
121 | if (hostname) { | |
122 | clp->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
123 | if (!clp->cl_hostname) | |
124 | goto error_3; | |
125 | } | |
126 | ||
127 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
128 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
129 | ||
130 | #ifdef CONFIG_NFS_V4 | |
131 | init_rwsem(&clp->cl_sem); | |
132 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 133 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 134 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
135 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
136 | clp->cl_boot_time = CURRENT_TIME; | |
137 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
138 | #endif | |
139 | ||
140 | return clp; | |
141 | ||
142 | error_3: | |
9c5bf38d TM |
143 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
144 | nfs_callback_down(); | |
24c8dbbb | 145 | error_2: |
24c8dbbb DH |
146 | kfree(clp); |
147 | error_0: | |
148 | return NULL; | |
149 | } | |
150 | ||
5dd3177a TM |
151 | static void nfs4_shutdown_client(struct nfs_client *clp) |
152 | { | |
153 | #ifdef CONFIG_NFS_V4 | |
154 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
155 | nfs4_kill_renewd(clp); | |
9f958ab8 | 156 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
157 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
158 | nfs_idmap_delete(clp); | |
159 | #endif | |
160 | } | |
161 | ||
24c8dbbb DH |
162 | /* |
163 | * Destroy a shared client record | |
164 | */ | |
165 | static void nfs_free_client(struct nfs_client *clp) | |
166 | { | |
167 | dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion); | |
168 | ||
5dd3177a | 169 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
170 | |
171 | /* -EIO all pending I/O */ | |
172 | if (!IS_ERR(clp->cl_rpcclient)) | |
173 | rpc_shutdown_client(clp->cl_rpcclient); | |
174 | ||
175 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
176 | nfs_callback_down(); | |
177 | ||
24c8dbbb DH |
178 | kfree(clp->cl_hostname); |
179 | kfree(clp); | |
180 | ||
181 | dprintk("<-- nfs_free_client()\n"); | |
182 | } | |
183 | ||
184 | /* | |
185 | * Release a reference to a shared client record | |
186 | */ | |
187 | void nfs_put_client(struct nfs_client *clp) | |
188 | { | |
27ba8512 DH |
189 | if (!clp) |
190 | return; | |
191 | ||
24c8dbbb DH |
192 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
193 | ||
194 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
195 | list_del(&clp->cl_share_link); | |
196 | spin_unlock(&nfs_client_lock); | |
197 | ||
198 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
199 | ||
200 | nfs_free_client(clp); | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * Find a client by address | |
206 | * - caller must hold nfs_client_lock | |
207 | */ | |
13bbc06a | 208 | static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion, int match_port) |
24c8dbbb DH |
209 | { |
210 | struct nfs_client *clp; | |
211 | ||
212 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
13bbc06a TM |
213 | /* Don't match clients that failed to initialise properly */ |
214 | if (clp->cl_cons_state < 0) | |
215 | continue; | |
216 | ||
24c8dbbb DH |
217 | /* Different NFS versions cannot share the same nfs_client */ |
218 | if (clp->cl_nfsversion != nfsversion) | |
219 | continue; | |
220 | ||
221 | if (memcmp(&clp->cl_addr.sin_addr, &addr->sin_addr, | |
222 | sizeof(clp->cl_addr.sin_addr)) != 0) | |
223 | continue; | |
224 | ||
13bbc06a | 225 | if (!match_port || clp->cl_addr.sin_port == addr->sin_port) |
24c8dbbb DH |
226 | goto found; |
227 | } | |
228 | ||
229 | return NULL; | |
230 | ||
231 | found: | |
232 | atomic_inc(&clp->cl_count); | |
233 | return clp; | |
234 | } | |
235 | ||
236 | /* | |
237 | * Find a client by IP address and protocol version | |
238 | * - returns NULL if no such client | |
239 | */ | |
240 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
241 | { | |
242 | struct nfs_client *clp; | |
243 | ||
244 | spin_lock(&nfs_client_lock); | |
13bbc06a | 245 | clp = __nfs_find_client(addr, nfsversion, 0); |
24c8dbbb | 246 | spin_unlock(&nfs_client_lock); |
13bbc06a TM |
247 | if (clp != NULL && clp->cl_cons_state != NFS_CS_READY) { |
248 | nfs_put_client(clp); | |
249 | clp = NULL; | |
250 | } | |
24c8dbbb DH |
251 | return clp; |
252 | } | |
253 | ||
254 | /* | |
255 | * Look up a client by IP address and protocol version | |
256 | * - creates a new record if one doesn't yet exist | |
257 | */ | |
54ceac45 DH |
258 | static struct nfs_client *nfs_get_client(const char *hostname, |
259 | const struct sockaddr_in *addr, | |
260 | int nfsversion) | |
24c8dbbb DH |
261 | { |
262 | struct nfs_client *clp, *new = NULL; | |
263 | int error; | |
264 | ||
265 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n", | |
266 | hostname ?: "", NIPQUAD(addr->sin_addr), | |
267 | addr->sin_port, nfsversion); | |
268 | ||
269 | /* see if the client already exists */ | |
270 | do { | |
271 | spin_lock(&nfs_client_lock); | |
272 | ||
13bbc06a | 273 | clp = __nfs_find_client(addr, nfsversion, 1); |
24c8dbbb DH |
274 | if (clp) |
275 | goto found_client; | |
276 | if (new) | |
277 | goto install_client; | |
278 | ||
279 | spin_unlock(&nfs_client_lock); | |
280 | ||
281 | new = nfs_alloc_client(hostname, addr, nfsversion); | |
282 | } while (new); | |
283 | ||
284 | return ERR_PTR(-ENOMEM); | |
285 | ||
286 | /* install a new client and return with it unready */ | |
287 | install_client: | |
288 | clp = new; | |
289 | list_add(&clp->cl_share_link, &nfs_client_list); | |
290 | spin_unlock(&nfs_client_lock); | |
291 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
292 | return clp; | |
293 | ||
294 | /* found an existing client | |
295 | * - make sure it's ready before returning | |
296 | */ | |
297 | found_client: | |
298 | spin_unlock(&nfs_client_lock); | |
299 | ||
300 | if (new) | |
301 | nfs_free_client(new); | |
302 | ||
83250493 | 303 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
304 | clp->cl_cons_state != NFS_CS_INITING); |
305 | if (error < 0) { | |
306 | nfs_put_client(clp); | |
307 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
308 | } |
309 | ||
310 | if (clp->cl_cons_state < NFS_CS_READY) { | |
311 | error = clp->cl_cons_state; | |
312 | nfs_put_client(clp); | |
313 | return ERR_PTR(error); | |
314 | } | |
315 | ||
54ceac45 DH |
316 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
317 | ||
24c8dbbb DH |
318 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
319 | return clp; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Mark a server as ready or failed | |
324 | */ | |
54ceac45 | 325 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
326 | { |
327 | clp->cl_cons_state = state; | |
328 | wake_up_all(&nfs_client_active_wq); | |
329 | } | |
5006a76c DH |
330 | |
331 | /* | |
332 | * Initialise the timeout values for a connection | |
333 | */ | |
334 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
335 | unsigned int timeo, unsigned int retrans) | |
336 | { | |
337 | to->to_initval = timeo * HZ / 10; | |
338 | to->to_retries = retrans; | |
339 | if (!to->to_retries) | |
340 | to->to_retries = 2; | |
341 | ||
342 | switch (proto) { | |
343 | case IPPROTO_TCP: | |
344 | if (!to->to_initval) | |
345 | to->to_initval = 60 * HZ; | |
346 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
347 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
348 | to->to_increment = to->to_initval; | |
349 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
350 | to->to_exponential = 0; | |
351 | break; | |
352 | case IPPROTO_UDP: | |
353 | default: | |
354 | if (!to->to_initval) | |
355 | to->to_initval = 11 * HZ / 10; | |
356 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
357 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
358 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
359 | to->to_exponential = 1; | |
360 | break; | |
361 | } | |
362 | } | |
363 | ||
364 | /* | |
365 | * Create an RPC client handle | |
366 | */ | |
54ceac45 DH |
367 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
368 | unsigned int timeo, | |
369 | unsigned int retrans, | |
43d78ef2 CL |
370 | rpc_authflavor_t flavor, |
371 | int flags) | |
5006a76c DH |
372 | { |
373 | struct rpc_timeout timeparms; | |
5006a76c | 374 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
375 | struct rpc_create_args args = { |
376 | .protocol = proto, | |
377 | .address = (struct sockaddr *)&clp->cl_addr, | |
378 | .addrsize = sizeof(clp->cl_addr), | |
379 | .timeout = &timeparms, | |
380 | .servername = clp->cl_hostname, | |
381 | .program = &nfs_program, | |
382 | .version = clp->rpc_ops->version, | |
383 | .authflavor = flavor, | |
43d78ef2 | 384 | .flags = flags, |
41877d20 | 385 | }; |
5006a76c DH |
386 | |
387 | if (!IS_ERR(clp->cl_rpcclient)) | |
388 | return 0; | |
389 | ||
390 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
391 | clp->retrans_timeo = timeparms.to_initval; | |
392 | clp->retrans_count = timeparms.to_retries; | |
393 | ||
41877d20 | 394 | clnt = rpc_create(&args); |
5006a76c DH |
395 | if (IS_ERR(clnt)) { |
396 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
397 | __FUNCTION__, PTR_ERR(clnt)); | |
398 | return PTR_ERR(clnt); | |
399 | } | |
400 | ||
5006a76c DH |
401 | clp->cl_rpcclient = clnt; |
402 | return 0; | |
403 | } | |
54ceac45 DH |
404 | |
405 | /* | |
406 | * Version 2 or 3 client destruction | |
407 | */ | |
408 | static void nfs_destroy_server(struct nfs_server *server) | |
409 | { | |
410 | if (!IS_ERR(server->client_acl)) | |
411 | rpc_shutdown_client(server->client_acl); | |
412 | ||
413 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
414 | lockd_down(); /* release rpc.lockd */ | |
415 | } | |
416 | ||
417 | /* | |
418 | * Version 2 or 3 lockd setup | |
419 | */ | |
420 | static int nfs_start_lockd(struct nfs_server *server) | |
421 | { | |
422 | int error = 0; | |
423 | ||
424 | if (server->nfs_client->cl_nfsversion > 3) | |
425 | goto out; | |
426 | if (server->flags & NFS_MOUNT_NONLM) | |
427 | goto out; | |
24e36663 N |
428 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
429 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
430 | if (error < 0) |
431 | server->flags |= NFS_MOUNT_NONLM; | |
432 | else | |
433 | server->destroy = nfs_destroy_server; | |
434 | out: | |
435 | return error; | |
436 | } | |
437 | ||
438 | /* | |
439 | * Initialise an NFSv3 ACL client connection | |
440 | */ | |
441 | #ifdef CONFIG_NFS_V3_ACL | |
442 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
443 | { | |
444 | if (server->nfs_client->cl_nfsversion != 3) | |
445 | goto out_noacl; | |
446 | if (server->flags & NFS_MOUNT_NOACL) | |
447 | goto out_noacl; | |
448 | ||
449 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
450 | if (IS_ERR(server->client_acl)) | |
451 | goto out_noacl; | |
452 | ||
453 | /* No errors! Assume that Sun nfsacls are supported */ | |
454 | server->caps |= NFS_CAP_ACLS; | |
455 | return; | |
456 | ||
457 | out_noacl: | |
458 | server->caps &= ~NFS_CAP_ACLS; | |
459 | } | |
460 | #else | |
461 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
462 | { | |
463 | server->flags &= ~NFS_MOUNT_NOACL; | |
464 | server->caps &= ~NFS_CAP_ACLS; | |
465 | } | |
466 | #endif | |
467 | ||
468 | /* | |
469 | * Create a general RPC client | |
470 | */ | |
471 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
472 | { | |
473 | struct nfs_client *clp = server->nfs_client; | |
474 | ||
475 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
476 | if (IS_ERR(server->client)) { | |
477 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
478 | return PTR_ERR(server->client); | |
479 | } | |
480 | ||
481 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
482 | struct rpc_auth *auth; | |
483 | ||
484 | auth = rpcauth_create(pseudoflavour, server->client); | |
485 | if (IS_ERR(auth)) { | |
486 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
487 | return PTR_ERR(auth); | |
488 | } | |
489 | } | |
490 | server->client->cl_softrtry = 0; | |
491 | if (server->flags & NFS_MOUNT_SOFT) | |
492 | server->client->cl_softrtry = 1; | |
493 | ||
494 | server->client->cl_intr = 0; | |
495 | if (server->flags & NFS4_MOUNT_INTR) | |
496 | server->client->cl_intr = 1; | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Initialise an NFS2 or NFS3 client | |
503 | */ | |
504 | static int nfs_init_client(struct nfs_client *clp, const struct nfs_mount_data *data) | |
505 | { | |
506 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; | |
507 | int error; | |
508 | ||
509 | if (clp->cl_cons_state == NFS_CS_READY) { | |
510 | /* the client is already initialised */ | |
511 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
512 | return 0; | |
513 | } | |
514 | ||
515 | /* Check NFS protocol revision and initialize RPC op vector */ | |
516 | clp->rpc_ops = &nfs_v2_clientops; | |
517 | #ifdef CONFIG_NFS_V3 | |
518 | if (clp->cl_nfsversion == 3) | |
519 | clp->rpc_ops = &nfs_v3_clientops; | |
520 | #endif | |
521 | /* | |
522 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
523 | * - RFC 2623, sec 2.3.2 | |
524 | */ | |
525 | error = nfs_create_rpc_client(clp, proto, data->timeo, data->retrans, | |
43d78ef2 | 526 | RPC_AUTH_UNIX, 0); |
54ceac45 DH |
527 | if (error < 0) |
528 | goto error; | |
529 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
530 | return 0; | |
531 | ||
532 | error: | |
533 | nfs_mark_client_ready(clp, error); | |
534 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
535 | return error; | |
536 | } | |
537 | ||
538 | /* | |
539 | * Create a version 2 or 3 client | |
540 | */ | |
541 | static int nfs_init_server(struct nfs_server *server, const struct nfs_mount_data *data) | |
542 | { | |
543 | struct nfs_client *clp; | |
544 | int error, nfsvers = 2; | |
545 | ||
546 | dprintk("--> nfs_init_server()\n"); | |
547 | ||
548 | #ifdef CONFIG_NFS_V3 | |
549 | if (data->flags & NFS_MOUNT_VER3) | |
550 | nfsvers = 3; | |
551 | #endif | |
552 | ||
553 | /* Allocate or find a client reference we can use */ | |
554 | clp = nfs_get_client(data->hostname, &data->addr, nfsvers); | |
555 | if (IS_ERR(clp)) { | |
556 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
557 | return PTR_ERR(clp); | |
558 | } | |
559 | ||
560 | error = nfs_init_client(clp, data); | |
561 | if (error < 0) | |
562 | goto error; | |
563 | ||
564 | server->nfs_client = clp; | |
565 | ||
566 | /* Initialise the client representation from the mount data */ | |
567 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
568 | ||
569 | if (data->rsize) | |
570 | server->rsize = nfs_block_size(data->rsize, NULL); | |
571 | if (data->wsize) | |
572 | server->wsize = nfs_block_size(data->wsize, NULL); | |
573 | ||
574 | server->acregmin = data->acregmin * HZ; | |
575 | server->acregmax = data->acregmax * HZ; | |
576 | server->acdirmin = data->acdirmin * HZ; | |
577 | server->acdirmax = data->acdirmax * HZ; | |
578 | ||
579 | /* Start lockd here, before we might error out */ | |
580 | error = nfs_start_lockd(server); | |
581 | if (error < 0) | |
582 | goto error; | |
583 | ||
584 | error = nfs_init_server_rpcclient(server, data->pseudoflavor); | |
585 | if (error < 0) | |
586 | goto error; | |
587 | ||
588 | server->namelen = data->namlen; | |
589 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
590 | nfs_init_server_aclclient(server); | |
591 | if (clp->cl_nfsversion == 3) { | |
592 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
593 | server->namelen = NFS3_MAXNAMLEN; | |
74dd34e6 SD |
594 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) |
595 | server->caps |= NFS_CAP_READDIRPLUS; | |
54ceac45 DH |
596 | } else { |
597 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
598 | server->namelen = NFS2_MAXNAMLEN; | |
599 | } | |
600 | ||
601 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); | |
602 | return 0; | |
603 | ||
604 | error: | |
605 | server->nfs_client = NULL; | |
606 | nfs_put_client(clp); | |
607 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
608 | return error; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Load up the server record from information gained in an fsinfo record | |
613 | */ | |
614 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
615 | { | |
616 | unsigned long max_rpc_payload; | |
617 | ||
618 | /* Work out a lot of parameters */ | |
619 | if (server->rsize == 0) | |
620 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
621 | if (server->wsize == 0) | |
622 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
623 | ||
624 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
625 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
626 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
627 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
628 | ||
629 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
630 | if (server->rsize > max_rpc_payload) | |
631 | server->rsize = max_rpc_payload; | |
632 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
633 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
634 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
635 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
636 | ||
637 | if (server->wsize > max_rpc_payload) | |
638 | server->wsize = max_rpc_payload; | |
639 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
640 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
641 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
642 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
643 | ||
644 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
645 | if (server->dtsize > PAGE_CACHE_SIZE) | |
646 | server->dtsize = PAGE_CACHE_SIZE; | |
647 | if (server->dtsize > server->rsize) | |
648 | server->dtsize = server->rsize; | |
649 | ||
650 | if (server->flags & NFS_MOUNT_NOAC) { | |
651 | server->acregmin = server->acregmax = 0; | |
652 | server->acdirmin = server->acdirmax = 0; | |
653 | } | |
654 | ||
655 | server->maxfilesize = fsinfo->maxfilesize; | |
656 | ||
657 | /* We're airborne Set socket buffersize */ | |
658 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
659 | } | |
660 | ||
661 | /* | |
662 | * Probe filesystem information, including the FSID on v2/v3 | |
663 | */ | |
664 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
665 | { | |
666 | struct nfs_fsinfo fsinfo; | |
667 | struct nfs_client *clp = server->nfs_client; | |
668 | int error; | |
669 | ||
670 | dprintk("--> nfs_probe_fsinfo()\n"); | |
671 | ||
672 | if (clp->rpc_ops->set_capabilities != NULL) { | |
673 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
674 | if (error < 0) | |
675 | goto out_error; | |
676 | } | |
677 | ||
678 | fsinfo.fattr = fattr; | |
679 | nfs_fattr_init(fattr); | |
680 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
681 | if (error < 0) | |
682 | goto out_error; | |
683 | ||
684 | nfs_server_set_fsinfo(server, &fsinfo); | |
685 | ||
686 | /* Get some general file system info */ | |
687 | if (server->namelen == 0) { | |
688 | struct nfs_pathconf pathinfo; | |
689 | ||
690 | pathinfo.fattr = fattr; | |
691 | nfs_fattr_init(fattr); | |
692 | ||
693 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
694 | server->namelen = pathinfo.max_namelen; | |
695 | } | |
696 | ||
697 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
698 | return 0; | |
699 | ||
700 | out_error: | |
701 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
702 | return error; | |
703 | } | |
704 | ||
705 | /* | |
706 | * Copy useful information when duplicating a server record | |
707 | */ | |
708 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
709 | { | |
710 | target->flags = source->flags; | |
711 | target->acregmin = source->acregmin; | |
712 | target->acregmax = source->acregmax; | |
713 | target->acdirmin = source->acdirmin; | |
714 | target->acdirmax = source->acdirmax; | |
715 | target->caps = source->caps; | |
716 | } | |
717 | ||
718 | /* | |
719 | * Allocate and initialise a server record | |
720 | */ | |
721 | static struct nfs_server *nfs_alloc_server(void) | |
722 | { | |
723 | struct nfs_server *server; | |
724 | ||
725 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
726 | if (!server) | |
727 | return NULL; | |
728 | ||
729 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
730 | ||
731 | /* Zero out the NFS state stuff */ | |
732 | INIT_LIST_HEAD(&server->client_link); | |
733 | INIT_LIST_HEAD(&server->master_link); | |
734 | ||
735 | server->io_stats = nfs_alloc_iostats(); | |
736 | if (!server->io_stats) { | |
737 | kfree(server); | |
738 | return NULL; | |
739 | } | |
740 | ||
741 | return server; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Free up a server record | |
746 | */ | |
747 | void nfs_free_server(struct nfs_server *server) | |
748 | { | |
749 | dprintk("--> nfs_free_server()\n"); | |
750 | ||
751 | spin_lock(&nfs_client_lock); | |
752 | list_del(&server->client_link); | |
753 | list_del(&server->master_link); | |
754 | spin_unlock(&nfs_client_lock); | |
755 | ||
756 | if (server->destroy != NULL) | |
757 | server->destroy(server); | |
758 | if (!IS_ERR(server->client)) | |
759 | rpc_shutdown_client(server->client); | |
760 | ||
761 | nfs_put_client(server->nfs_client); | |
762 | ||
763 | nfs_free_iostats(server->io_stats); | |
764 | kfree(server); | |
765 | nfs_release_automount_timer(); | |
766 | dprintk("<-- nfs_free_server()\n"); | |
767 | } | |
768 | ||
769 | /* | |
770 | * Create a version 2 or 3 volume record | |
771 | * - keyed on server and FSID | |
772 | */ | |
773 | struct nfs_server *nfs_create_server(const struct nfs_mount_data *data, | |
774 | struct nfs_fh *mntfh) | |
775 | { | |
776 | struct nfs_server *server; | |
777 | struct nfs_fattr fattr; | |
778 | int error; | |
779 | ||
780 | server = nfs_alloc_server(); | |
781 | if (!server) | |
782 | return ERR_PTR(-ENOMEM); | |
783 | ||
784 | /* Get a client representation */ | |
785 | error = nfs_init_server(server, data); | |
786 | if (error < 0) | |
787 | goto error; | |
788 | ||
789 | BUG_ON(!server->nfs_client); | |
790 | BUG_ON(!server->nfs_client->rpc_ops); | |
791 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
792 | ||
793 | /* Probe the root fh to retrieve its FSID */ | |
794 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
795 | if (error < 0) | |
796 | goto error; | |
797 | if (!(fattr.valid & NFS_ATTR_FATTR)) { | |
798 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
799 | if (error < 0) { | |
800 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
801 | goto error; | |
802 | } | |
803 | } | |
804 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
805 | ||
6daabf1b DH |
806 | dprintk("Server FSID: %llx:%llx\n", |
807 | (unsigned long long) server->fsid.major, | |
808 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
809 | |
810 | BUG_ON(!server->nfs_client); | |
811 | BUG_ON(!server->nfs_client->rpc_ops); | |
812 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
813 | ||
814 | spin_lock(&nfs_client_lock); | |
815 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
816 | list_add_tail(&server->master_link, &nfs_volume_list); | |
817 | spin_unlock(&nfs_client_lock); | |
818 | ||
819 | server->mount_time = jiffies; | |
820 | return server; | |
821 | ||
822 | error: | |
823 | nfs_free_server(server); | |
824 | return ERR_PTR(error); | |
825 | } | |
826 | ||
827 | #ifdef CONFIG_NFS_V4 | |
828 | /* | |
829 | * Initialise an NFS4 client record | |
830 | */ | |
831 | static int nfs4_init_client(struct nfs_client *clp, | |
832 | int proto, int timeo, int retrans, | |
7d9ac06f | 833 | const char *ip_addr, |
54ceac45 DH |
834 | rpc_authflavor_t authflavour) |
835 | { | |
836 | int error; | |
837 | ||
838 | if (clp->cl_cons_state == NFS_CS_READY) { | |
839 | /* the client is initialised already */ | |
840 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
841 | return 0; | |
842 | } | |
843 | ||
844 | /* Check NFS protocol revision and initialize RPC op vector */ | |
845 | clp->rpc_ops = &nfs_v4_clientops; | |
846 | ||
43d78ef2 CL |
847 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
848 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
849 | if (error < 0) |
850 | goto error; | |
7d9ac06f | 851 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
852 | |
853 | error = nfs_idmap_new(clp); | |
854 | if (error < 0) { | |
855 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
856 | __FUNCTION__, error); | |
54ceac45 DH |
857 | goto error; |
858 | } | |
9c5bf38d | 859 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
860 | |
861 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
862 | return 0; | |
863 | ||
864 | error: | |
865 | nfs_mark_client_ready(clp, error); | |
866 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
867 | return error; | |
868 | } | |
869 | ||
870 | /* | |
871 | * Set up an NFS4 client | |
872 | */ | |
873 | static int nfs4_set_client(struct nfs_server *server, | |
874 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 875 | const char *ip_addr, |
54ceac45 DH |
876 | rpc_authflavor_t authflavour, |
877 | int proto, int timeo, int retrans) | |
878 | { | |
879 | struct nfs_client *clp; | |
880 | int error; | |
881 | ||
882 | dprintk("--> nfs4_set_client()\n"); | |
883 | ||
884 | /* Allocate or find a client reference we can use */ | |
885 | clp = nfs_get_client(hostname, addr, 4); | |
886 | if (IS_ERR(clp)) { | |
887 | error = PTR_ERR(clp); | |
888 | goto error; | |
889 | } | |
7d9ac06f | 890 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
891 | if (error < 0) |
892 | goto error_put; | |
893 | ||
894 | server->nfs_client = clp; | |
895 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
896 | return 0; | |
897 | ||
898 | error_put: | |
899 | nfs_put_client(clp); | |
900 | error: | |
901 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
902 | return error; | |
903 | } | |
904 | ||
905 | /* | |
906 | * Create a version 4 volume record | |
907 | */ | |
908 | static int nfs4_init_server(struct nfs_server *server, | |
909 | const struct nfs4_mount_data *data, rpc_authflavor_t authflavour) | |
910 | { | |
911 | int error; | |
912 | ||
913 | dprintk("--> nfs4_init_server()\n"); | |
914 | ||
915 | /* Initialise the client representation from the mount data */ | |
916 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
917 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
918 | ||
919 | if (data->rsize) | |
920 | server->rsize = nfs_block_size(data->rsize, NULL); | |
921 | if (data->wsize) | |
922 | server->wsize = nfs_block_size(data->wsize, NULL); | |
923 | ||
924 | server->acregmin = data->acregmin * HZ; | |
925 | server->acregmax = data->acregmax * HZ; | |
926 | server->acdirmin = data->acdirmin * HZ; | |
927 | server->acdirmax = data->acdirmax * HZ; | |
928 | ||
929 | error = nfs_init_server_rpcclient(server, authflavour); | |
930 | ||
931 | /* Done */ | |
932 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
933 | return error; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Create a version 4 volume record | |
938 | * - keyed on server and FSID | |
939 | */ | |
940 | struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data, | |
941 | const char *hostname, | |
942 | const struct sockaddr_in *addr, | |
943 | const char *mntpath, | |
944 | const char *ip_addr, | |
945 | rpc_authflavor_t authflavour, | |
946 | struct nfs_fh *mntfh) | |
947 | { | |
948 | struct nfs_fattr fattr; | |
949 | struct nfs_server *server; | |
950 | int error; | |
951 | ||
952 | dprintk("--> nfs4_create_server()\n"); | |
953 | ||
954 | server = nfs_alloc_server(); | |
955 | if (!server) | |
956 | return ERR_PTR(-ENOMEM); | |
957 | ||
958 | /* Get a client record */ | |
7d9ac06f | 959 | error = nfs4_set_client(server, hostname, addr, ip_addr, authflavour, |
54ceac45 DH |
960 | data->proto, data->timeo, data->retrans); |
961 | if (error < 0) | |
962 | goto error; | |
963 | ||
964 | /* set up the general RPC client */ | |
965 | error = nfs4_init_server(server, data, authflavour); | |
966 | if (error < 0) | |
967 | goto error; | |
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 | /* Probe the root fh to retrieve its FSID */ | |
974 | error = nfs4_path_walk(server, mntfh, mntpath); | |
975 | if (error < 0) | |
976 | goto error; | |
977 | ||
6daabf1b DH |
978 | dprintk("Server FSID: %llx:%llx\n", |
979 | (unsigned long long) server->fsid.major, | |
980 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
981 | dprintk("Mount FH: %d\n", mntfh->size); |
982 | ||
983 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
984 | if (error < 0) | |
985 | goto error; | |
986 | ||
987 | BUG_ON(!server->nfs_client); | |
988 | BUG_ON(!server->nfs_client->rpc_ops); | |
989 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
990 | ||
991 | spin_lock(&nfs_client_lock); | |
992 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
993 | list_add_tail(&server->master_link, &nfs_volume_list); | |
994 | spin_unlock(&nfs_client_lock); | |
995 | ||
996 | server->mount_time = jiffies; | |
997 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
998 | return server; | |
999 | ||
1000 | error: | |
1001 | nfs_free_server(server); | |
1002 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1003 | return ERR_PTR(error); | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Create an NFS4 referral server record | |
1008 | */ | |
1009 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1010 | struct nfs_fh *mntfh) |
54ceac45 DH |
1011 | { |
1012 | struct nfs_client *parent_client; | |
1013 | struct nfs_server *server, *parent_server; | |
1014 | struct nfs_fattr fattr; | |
1015 | int error; | |
1016 | ||
1017 | dprintk("--> nfs4_create_referral_server()\n"); | |
1018 | ||
1019 | server = nfs_alloc_server(); | |
1020 | if (!server) | |
1021 | return ERR_PTR(-ENOMEM); | |
1022 | ||
1023 | parent_server = NFS_SB(data->sb); | |
1024 | parent_client = parent_server->nfs_client; | |
1025 | ||
1026 | /* Get a client representation. | |
1027 | * Note: NFSv4 always uses TCP, */ | |
1028 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1029 | parent_client->cl_ipaddr, |
54ceac45 DH |
1030 | data->authflavor, |
1031 | parent_server->client->cl_xprt->prot, | |
1032 | parent_client->retrans_timeo, | |
1033 | parent_client->retrans_count); | |
297de4f6 | 1034 | if (error < 0) |
1035 | goto error; | |
54ceac45 DH |
1036 | |
1037 | /* Initialise the client representation from the parent server */ | |
1038 | nfs_server_copy_userdata(server, parent_server); | |
1039 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1040 | ||
1041 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1042 | if (error < 0) | |
1043 | goto error; | |
1044 | ||
1045 | BUG_ON(!server->nfs_client); | |
1046 | BUG_ON(!server->nfs_client->rpc_ops); | |
1047 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1048 | ||
f2d0d85e TM |
1049 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1050 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1051 | if (error < 0) | |
1052 | goto error; | |
1053 | ||
54ceac45 | 1054 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1055 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1056 | if (error < 0) |
1057 | goto error; | |
1058 | ||
1059 | dprintk("Referral FSID: %llx:%llx\n", | |
6daabf1b DH |
1060 | (unsigned long long) server->fsid.major, |
1061 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1062 | |
1063 | spin_lock(&nfs_client_lock); | |
1064 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1065 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1066 | spin_unlock(&nfs_client_lock); | |
1067 | ||
1068 | server->mount_time = jiffies; | |
1069 | ||
1070 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1071 | return server; | |
1072 | ||
1073 | error: | |
1074 | nfs_free_server(server); | |
1075 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1076 | return ERR_PTR(error); | |
1077 | } | |
1078 | ||
1079 | #endif /* CONFIG_NFS_V4 */ | |
1080 | ||
1081 | /* | |
1082 | * Clone an NFS2, NFS3 or NFS4 server record | |
1083 | */ | |
1084 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1085 | struct nfs_fh *fh, | |
1086 | struct nfs_fattr *fattr) | |
1087 | { | |
1088 | struct nfs_server *server; | |
1089 | struct nfs_fattr fattr_fsinfo; | |
1090 | int error; | |
1091 | ||
1092 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1093 | (unsigned long long) fattr->fsid.major, |
1094 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1095 | |
1096 | server = nfs_alloc_server(); | |
1097 | if (!server) | |
1098 | return ERR_PTR(-ENOMEM); | |
1099 | ||
1100 | /* Copy data from the source */ | |
1101 | server->nfs_client = source->nfs_client; | |
1102 | atomic_inc(&server->nfs_client->cl_count); | |
1103 | nfs_server_copy_userdata(server, source); | |
1104 | ||
1105 | server->fsid = fattr->fsid; | |
1106 | ||
1107 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1108 | if (error < 0) | |
1109 | goto out_free_server; | |
1110 | if (!IS_ERR(source->client_acl)) | |
1111 | nfs_init_server_aclclient(server); | |
1112 | ||
1113 | /* probe the filesystem info for this server filesystem */ | |
1114 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1115 | if (error < 0) | |
1116 | goto out_free_server; | |
1117 | ||
1118 | dprintk("Cloned FSID: %llx:%llx\n", | |
6daabf1b DH |
1119 | (unsigned long long) server->fsid.major, |
1120 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1121 | |
1122 | error = nfs_start_lockd(server); | |
1123 | if (error < 0) | |
1124 | goto out_free_server; | |
1125 | ||
1126 | spin_lock(&nfs_client_lock); | |
1127 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1128 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1129 | spin_unlock(&nfs_client_lock); | |
1130 | ||
1131 | server->mount_time = jiffies; | |
1132 | ||
1133 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1134 | return server; | |
1135 | ||
1136 | out_free_server: | |
1137 | nfs_free_server(server); | |
1138 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1139 | return ERR_PTR(error); | |
1140 | } | |
6aaca566 DH |
1141 | |
1142 | #ifdef CONFIG_PROC_FS | |
1143 | static struct proc_dir_entry *proc_fs_nfs; | |
1144 | ||
1145 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1146 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1147 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1148 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1149 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1150 | ||
1151 | static struct seq_operations nfs_server_list_ops = { | |
1152 | .start = nfs_server_list_start, | |
1153 | .next = nfs_server_list_next, | |
1154 | .stop = nfs_server_list_stop, | |
1155 | .show = nfs_server_list_show, | |
1156 | }; | |
1157 | ||
00977a59 | 1158 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1159 | .open = nfs_server_list_open, |
1160 | .read = seq_read, | |
1161 | .llseek = seq_lseek, | |
1162 | .release = seq_release, | |
1163 | }; | |
1164 | ||
1165 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1166 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1167 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1168 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1169 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1170 | ||
1171 | static struct seq_operations nfs_volume_list_ops = { | |
1172 | .start = nfs_volume_list_start, | |
1173 | .next = nfs_volume_list_next, | |
1174 | .stop = nfs_volume_list_stop, | |
1175 | .show = nfs_volume_list_show, | |
1176 | }; | |
1177 | ||
00977a59 | 1178 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1179 | .open = nfs_volume_list_open, |
1180 | .read = seq_read, | |
1181 | .llseek = seq_lseek, | |
1182 | .release = seq_release, | |
1183 | }; | |
1184 | ||
1185 | /* | |
1186 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1187 | * we're dealing | |
1188 | */ | |
1189 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1190 | { | |
1191 | struct seq_file *m; | |
1192 | int ret; | |
1193 | ||
1194 | ret = seq_open(file, &nfs_server_list_ops); | |
1195 | if (ret < 0) | |
1196 | return ret; | |
1197 | ||
1198 | m = file->private_data; | |
1199 | m->private = PDE(inode)->data; | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * set up the iterator to start reading from the server list and return the first item | |
1206 | */ | |
1207 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1208 | { | |
1209 | struct list_head *_p; | |
1210 | loff_t pos = *_pos; | |
1211 | ||
1212 | /* lock the list against modification */ | |
1213 | spin_lock(&nfs_client_lock); | |
1214 | ||
1215 | /* allow for the header line */ | |
1216 | if (!pos) | |
1217 | return SEQ_START_TOKEN; | |
1218 | pos--; | |
1219 | ||
1220 | /* find the n'th element in the list */ | |
1221 | list_for_each(_p, &nfs_client_list) | |
1222 | if (!pos--) | |
1223 | break; | |
1224 | ||
1225 | return _p != &nfs_client_list ? _p : NULL; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * move to next server | |
1230 | */ | |
1231 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1232 | { | |
1233 | struct list_head *_p; | |
1234 | ||
1235 | (*pos)++; | |
1236 | ||
1237 | _p = v; | |
1238 | _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next; | |
1239 | ||
1240 | return _p != &nfs_client_list ? _p : NULL; | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * clean up after reading from the transports list | |
1245 | */ | |
1246 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1247 | { | |
1248 | spin_unlock(&nfs_client_lock); | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * display a header line followed by a load of call lines | |
1253 | */ | |
1254 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1255 | { | |
1256 | struct nfs_client *clp; | |
1257 | ||
1258 | /* display header on line 1 */ | |
1259 | if (v == SEQ_START_TOKEN) { | |
1260 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | /* display one transport per line on subsequent lines */ | |
1265 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1266 | ||
1267 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1268 | clp->cl_nfsversion, | |
1269 | NIPQUAD(clp->cl_addr.sin_addr), | |
1270 | ntohs(clp->cl_addr.sin_port), | |
1271 | atomic_read(&clp->cl_count), | |
1272 | clp->cl_hostname); | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1279 | */ | |
1280 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1281 | { | |
1282 | struct seq_file *m; | |
1283 | int ret; | |
1284 | ||
1285 | ret = seq_open(file, &nfs_volume_list_ops); | |
1286 | if (ret < 0) | |
1287 | return ret; | |
1288 | ||
1289 | m = file->private_data; | |
1290 | m->private = PDE(inode)->data; | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * set up the iterator to start reading from the volume list and return the first item | |
1297 | */ | |
1298 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1299 | { | |
1300 | struct list_head *_p; | |
1301 | loff_t pos = *_pos; | |
1302 | ||
1303 | /* lock the list against modification */ | |
1304 | spin_lock(&nfs_client_lock); | |
1305 | ||
1306 | /* allow for the header line */ | |
1307 | if (!pos) | |
1308 | return SEQ_START_TOKEN; | |
1309 | pos--; | |
1310 | ||
1311 | /* find the n'th element in the list */ | |
1312 | list_for_each(_p, &nfs_volume_list) | |
1313 | if (!pos--) | |
1314 | break; | |
1315 | ||
1316 | return _p != &nfs_volume_list ? _p : NULL; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * move to next volume | |
1321 | */ | |
1322 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1323 | { | |
1324 | struct list_head *_p; | |
1325 | ||
1326 | (*pos)++; | |
1327 | ||
1328 | _p = v; | |
1329 | _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next; | |
1330 | ||
1331 | return _p != &nfs_volume_list ? _p : NULL; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * clean up after reading from the transports list | |
1336 | */ | |
1337 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1338 | { | |
1339 | spin_unlock(&nfs_client_lock); | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * display a header line followed by a load of call lines | |
1344 | */ | |
1345 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1346 | { | |
1347 | struct nfs_server *server; | |
1348 | struct nfs_client *clp; | |
1349 | char dev[8], fsid[17]; | |
1350 | ||
1351 | /* display header on line 1 */ | |
1352 | if (v == SEQ_START_TOKEN) { | |
1353 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); | |
1354 | return 0; | |
1355 | } | |
1356 | /* display one transport per line on subsequent lines */ | |
1357 | server = list_entry(v, struct nfs_server, master_link); | |
1358 | clp = server->nfs_client; | |
1359 | ||
1360 | snprintf(dev, 8, "%u:%u", | |
1361 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1362 | ||
1363 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1364 | (unsigned long long) server->fsid.major, |
1365 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1366 | |
1367 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1368 | clp->cl_nfsversion, | |
1369 | NIPQUAD(clp->cl_addr.sin_addr), | |
1370 | ntohs(clp->cl_addr.sin_port), | |
1371 | dev, | |
1372 | fsid); | |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * initialise the /proc/fs/nfsfs/ directory | |
1379 | */ | |
1380 | int __init nfs_fs_proc_init(void) | |
1381 | { | |
1382 | struct proc_dir_entry *p; | |
1383 | ||
1384 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1385 | if (!proc_fs_nfs) | |
1386 | goto error_0; | |
1387 | ||
1388 | proc_fs_nfs->owner = THIS_MODULE; | |
1389 | ||
1390 | /* a file of servers with which we're dealing */ | |
1391 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1392 | if (!p) | |
1393 | goto error_1; | |
1394 | ||
1395 | p->proc_fops = &nfs_server_list_fops; | |
1396 | p->owner = THIS_MODULE; | |
1397 | ||
1398 | /* a file of volumes that we have mounted */ | |
1399 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1400 | if (!p) | |
1401 | goto error_2; | |
1402 | ||
1403 | p->proc_fops = &nfs_volume_list_fops; | |
1404 | p->owner = THIS_MODULE; | |
1405 | return 0; | |
1406 | ||
1407 | error_2: | |
1408 | remove_proc_entry("servers", proc_fs_nfs); | |
1409 | error_1: | |
1410 | remove_proc_entry("nfsfs", proc_root_fs); | |
1411 | error_0: | |
1412 | return -ENOMEM; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * clean up the /proc/fs/nfsfs/ directory | |
1417 | */ | |
1418 | void nfs_fs_proc_exit(void) | |
1419 | { | |
1420 | remove_proc_entry("volumes", proc_fs_nfs); | |
1421 | remove_proc_entry("servers", proc_fs_nfs); | |
1422 | remove_proc_entry("nfsfs", proc_root_fs); | |
1423 | } | |
1424 | ||
1425 | #endif /* CONFIG_PROC_FS */ |