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 | ||
13 | #include <linux/config.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | ||
17 | #include <linux/time.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/stat.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/unistd.h> | |
24 | #include <linux/sunrpc/clnt.h> | |
25 | #include <linux/sunrpc/stats.h> | |
26 | #include <linux/sunrpc/metrics.h> | |
27 | #include <linux/nfs_fs.h> | |
28 | #include <linux/nfs_mount.h> | |
29 | #include <linux/nfs4_mount.h> | |
30 | #include <linux/lockd/bind.h> | |
31 | #include <linux/smp_lock.h> | |
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> | |
37 | #include <linux/nfs_xdr.h> | |
38 | ||
39 | #include <asm/system.h> | |
40 | ||
41 | #include "nfs4_fs.h" | |
42 | #include "callback.h" | |
43 | #include "delegation.h" | |
44 | #include "iostat.h" | |
45 | #include "internal.h" | |
46 | ||
47 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
48 | ||
49 | static DEFINE_SPINLOCK(nfs_client_lock); | |
50 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 51 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
52 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
53 | ||
5006a76c DH |
54 | /* |
55 | * RPC cruft for NFS | |
56 | */ | |
57 | static struct rpc_version *nfs_version[5] = { | |
58 | [2] = &nfs_version2, | |
59 | #ifdef CONFIG_NFS_V3 | |
60 | [3] = &nfs_version3, | |
61 | #endif | |
62 | #ifdef CONFIG_NFS_V4 | |
63 | [4] = &nfs_version4, | |
64 | #endif | |
65 | }; | |
66 | ||
67 | struct rpc_program nfs_program = { | |
68 | .name = "nfs", | |
69 | .number = NFS_PROGRAM, | |
70 | .nrvers = ARRAY_SIZE(nfs_version), | |
71 | .version = nfs_version, | |
72 | .stats = &nfs_rpcstat, | |
73 | .pipe_dir_name = "/nfs", | |
74 | }; | |
75 | ||
76 | struct rpc_stat nfs_rpcstat = { | |
77 | .program = &nfs_program | |
78 | }; | |
79 | ||
80 | ||
81 | #ifdef CONFIG_NFS_V3_ACL | |
82 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
83 | static struct rpc_version * nfsacl_version[] = { | |
84 | [3] = &nfsacl_version3, | |
85 | }; | |
86 | ||
87 | struct rpc_program nfsacl_program = { | |
88 | .name = "nfsacl", | |
89 | .number = NFS_ACL_PROGRAM, | |
90 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
91 | .version = nfsacl_version, | |
92 | .stats = &nfsacl_rpcstat, | |
93 | }; | |
94 | #endif /* CONFIG_NFS_V3_ACL */ | |
95 | ||
24c8dbbb DH |
96 | /* |
97 | * Allocate a shared client record | |
98 | * | |
99 | * Since these are allocated/deallocated very rarely, we don't | |
100 | * bother putting them in a slab cache... | |
101 | */ | |
102 | static struct nfs_client *nfs_alloc_client(const char *hostname, | |
103 | const struct sockaddr_in *addr, | |
104 | int nfsversion) | |
105 | { | |
106 | struct nfs_client *clp; | |
107 | int error; | |
108 | ||
109 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
110 | goto error_0; | |
111 | ||
112 | error = rpciod_up(); | |
113 | if (error < 0) { | |
114 | dprintk("%s: couldn't start rpciod! Error = %d\n", | |
115 | __FUNCTION__, error); | |
24c8dbbb DH |
116 | goto error_1; |
117 | } | |
9c5bf38d | 118 | __set_bit(NFS_CS_RPCIOD, &clp->cl_res_state); |
24c8dbbb DH |
119 | |
120 | if (nfsversion == 4) { | |
121 | if (nfs_callback_up() < 0) | |
122 | goto error_2; | |
123 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
124 | } | |
125 | ||
126 | atomic_set(&clp->cl_count, 1); | |
127 | clp->cl_cons_state = NFS_CS_INITING; | |
128 | ||
129 | clp->cl_nfsversion = nfsversion; | |
130 | memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr)); | |
131 | ||
132 | if (hostname) { | |
133 | clp->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
134 | if (!clp->cl_hostname) | |
135 | goto error_3; | |
136 | } | |
137 | ||
138 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
139 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
140 | ||
141 | #ifdef CONFIG_NFS_V4 | |
142 | init_rwsem(&clp->cl_sem); | |
143 | INIT_LIST_HEAD(&clp->cl_delegations); | |
144 | INIT_LIST_HEAD(&clp->cl_state_owners); | |
145 | INIT_LIST_HEAD(&clp->cl_unused); | |
146 | spin_lock_init(&clp->cl_lock); | |
147 | INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp); | |
148 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
149 | clp->cl_boot_time = CURRENT_TIME; | |
150 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
151 | #endif | |
152 | ||
153 | return clp; | |
154 | ||
155 | error_3: | |
9c5bf38d TM |
156 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
157 | nfs_callback_down(); | |
24c8dbbb DH |
158 | error_2: |
159 | rpciod_down(); | |
160 | __clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state); | |
161 | error_1: | |
162 | kfree(clp); | |
163 | error_0: | |
164 | return NULL; | |
165 | } | |
166 | ||
5dd3177a TM |
167 | static void nfs4_shutdown_client(struct nfs_client *clp) |
168 | { | |
169 | #ifdef CONFIG_NFS_V4 | |
170 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
171 | nfs4_kill_renewd(clp); | |
172 | while (!list_empty(&clp->cl_unused)) { | |
173 | struct nfs4_state_owner *sp; | |
174 | ||
175 | sp = list_entry(clp->cl_unused.next, | |
176 | struct nfs4_state_owner, | |
177 | so_list); | |
178 | list_del(&sp->so_list); | |
179 | kfree(sp); | |
180 | } | |
181 | BUG_ON(!list_empty(&clp->cl_state_owners)); | |
182 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
183 | nfs_idmap_delete(clp); | |
184 | #endif | |
185 | } | |
186 | ||
24c8dbbb DH |
187 | /* |
188 | * Destroy a shared client record | |
189 | */ | |
190 | static void nfs_free_client(struct nfs_client *clp) | |
191 | { | |
192 | dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion); | |
193 | ||
5dd3177a | 194 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
195 | |
196 | /* -EIO all pending I/O */ | |
197 | if (!IS_ERR(clp->cl_rpcclient)) | |
198 | rpc_shutdown_client(clp->cl_rpcclient); | |
199 | ||
200 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
201 | nfs_callback_down(); | |
202 | ||
203 | if (__test_and_clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state)) | |
9c5bf38d | 204 | rpciod_down(); |
24c8dbbb DH |
205 | |
206 | kfree(clp->cl_hostname); | |
207 | kfree(clp); | |
208 | ||
209 | dprintk("<-- nfs_free_client()\n"); | |
210 | } | |
211 | ||
212 | /* | |
213 | * Release a reference to a shared client record | |
214 | */ | |
215 | void nfs_put_client(struct nfs_client *clp) | |
216 | { | |
27ba8512 DH |
217 | if (!clp) |
218 | return; | |
219 | ||
24c8dbbb DH |
220 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
221 | ||
222 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
223 | list_del(&clp->cl_share_link); | |
224 | spin_unlock(&nfs_client_lock); | |
225 | ||
226 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
227 | ||
228 | nfs_free_client(clp); | |
229 | } | |
230 | } | |
231 | ||
232 | /* | |
233 | * Find a client by address | |
234 | * - caller must hold nfs_client_lock | |
235 | */ | |
236 | static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
237 | { | |
238 | struct nfs_client *clp; | |
239 | ||
240 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
241 | /* Different NFS versions cannot share the same nfs_client */ | |
242 | if (clp->cl_nfsversion != nfsversion) | |
243 | continue; | |
244 | ||
245 | if (memcmp(&clp->cl_addr.sin_addr, &addr->sin_addr, | |
246 | sizeof(clp->cl_addr.sin_addr)) != 0) | |
247 | continue; | |
248 | ||
249 | if (clp->cl_addr.sin_port == addr->sin_port) | |
250 | goto found; | |
251 | } | |
252 | ||
253 | return NULL; | |
254 | ||
255 | found: | |
256 | atomic_inc(&clp->cl_count); | |
257 | return clp; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Find a client by IP address and protocol version | |
262 | * - returns NULL if no such client | |
263 | */ | |
264 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
265 | { | |
266 | struct nfs_client *clp; | |
267 | ||
268 | spin_lock(&nfs_client_lock); | |
269 | clp = __nfs_find_client(addr, nfsversion); | |
270 | spin_unlock(&nfs_client_lock); | |
271 | ||
2dec5146 | 272 | BUG_ON(clp && clp->cl_cons_state == 0); |
24c8dbbb DH |
273 | |
274 | return clp; | |
275 | } | |
276 | ||
277 | /* | |
278 | * Look up a client by IP address and protocol version | |
279 | * - creates a new record if one doesn't yet exist | |
280 | */ | |
54ceac45 DH |
281 | static struct nfs_client *nfs_get_client(const char *hostname, |
282 | const struct sockaddr_in *addr, | |
283 | int nfsversion) | |
24c8dbbb DH |
284 | { |
285 | struct nfs_client *clp, *new = NULL; | |
286 | int error; | |
287 | ||
288 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n", | |
289 | hostname ?: "", NIPQUAD(addr->sin_addr), | |
290 | addr->sin_port, nfsversion); | |
291 | ||
292 | /* see if the client already exists */ | |
293 | do { | |
294 | spin_lock(&nfs_client_lock); | |
295 | ||
296 | clp = __nfs_find_client(addr, nfsversion); | |
297 | if (clp) | |
298 | goto found_client; | |
299 | if (new) | |
300 | goto install_client; | |
301 | ||
302 | spin_unlock(&nfs_client_lock); | |
303 | ||
304 | new = nfs_alloc_client(hostname, addr, nfsversion); | |
305 | } while (new); | |
306 | ||
307 | return ERR_PTR(-ENOMEM); | |
308 | ||
309 | /* install a new client and return with it unready */ | |
310 | install_client: | |
311 | clp = new; | |
312 | list_add(&clp->cl_share_link, &nfs_client_list); | |
313 | spin_unlock(&nfs_client_lock); | |
314 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
315 | return clp; | |
316 | ||
317 | /* found an existing client | |
318 | * - make sure it's ready before returning | |
319 | */ | |
320 | found_client: | |
321 | spin_unlock(&nfs_client_lock); | |
322 | ||
323 | if (new) | |
324 | nfs_free_client(new); | |
325 | ||
326 | if (clp->cl_cons_state == NFS_CS_INITING) { | |
327 | DECLARE_WAITQUEUE(myself, current); | |
328 | ||
329 | add_wait_queue(&nfs_client_active_wq, &myself); | |
330 | ||
331 | for (;;) { | |
332 | set_current_state(TASK_INTERRUPTIBLE); | |
333 | if (signal_pending(current) || | |
334 | clp->cl_cons_state > NFS_CS_READY) | |
335 | break; | |
336 | schedule(); | |
337 | } | |
338 | ||
339 | remove_wait_queue(&nfs_client_active_wq, &myself); | |
340 | ||
341 | if (signal_pending(current)) { | |
342 | nfs_put_client(clp); | |
343 | return ERR_PTR(-ERESTARTSYS); | |
344 | } | |
345 | } | |
346 | ||
347 | if (clp->cl_cons_state < NFS_CS_READY) { | |
348 | error = clp->cl_cons_state; | |
349 | nfs_put_client(clp); | |
350 | return ERR_PTR(error); | |
351 | } | |
352 | ||
54ceac45 DH |
353 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
354 | ||
24c8dbbb DH |
355 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
356 | return clp; | |
357 | } | |
358 | ||
359 | /* | |
360 | * Mark a server as ready or failed | |
361 | */ | |
54ceac45 | 362 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
363 | { |
364 | clp->cl_cons_state = state; | |
365 | wake_up_all(&nfs_client_active_wq); | |
366 | } | |
5006a76c DH |
367 | |
368 | /* | |
369 | * Initialise the timeout values for a connection | |
370 | */ | |
371 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
372 | unsigned int timeo, unsigned int retrans) | |
373 | { | |
374 | to->to_initval = timeo * HZ / 10; | |
375 | to->to_retries = retrans; | |
376 | if (!to->to_retries) | |
377 | to->to_retries = 2; | |
378 | ||
379 | switch (proto) { | |
380 | case IPPROTO_TCP: | |
381 | if (!to->to_initval) | |
382 | to->to_initval = 60 * HZ; | |
383 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
384 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
385 | to->to_increment = to->to_initval; | |
386 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
387 | to->to_exponential = 0; | |
388 | break; | |
389 | case IPPROTO_UDP: | |
390 | default: | |
391 | if (!to->to_initval) | |
392 | to->to_initval = 11 * HZ / 10; | |
393 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
394 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
395 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
396 | to->to_exponential = 1; | |
397 | break; | |
398 | } | |
399 | } | |
400 | ||
401 | /* | |
402 | * Create an RPC client handle | |
403 | */ | |
54ceac45 DH |
404 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
405 | unsigned int timeo, | |
406 | unsigned int retrans, | |
407 | rpc_authflavor_t flavor) | |
5006a76c DH |
408 | { |
409 | struct rpc_timeout timeparms; | |
5006a76c | 410 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
411 | struct rpc_create_args args = { |
412 | .protocol = proto, | |
413 | .address = (struct sockaddr *)&clp->cl_addr, | |
414 | .addrsize = sizeof(clp->cl_addr), | |
415 | .timeout = &timeparms, | |
416 | .servername = clp->cl_hostname, | |
417 | .program = &nfs_program, | |
418 | .version = clp->rpc_ops->version, | |
419 | .authflavor = flavor, | |
420 | }; | |
5006a76c DH |
421 | |
422 | if (!IS_ERR(clp->cl_rpcclient)) | |
423 | return 0; | |
424 | ||
425 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
426 | clp->retrans_timeo = timeparms.to_initval; | |
427 | clp->retrans_count = timeparms.to_retries; | |
428 | ||
41877d20 | 429 | clnt = rpc_create(&args); |
5006a76c DH |
430 | if (IS_ERR(clnt)) { |
431 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
432 | __FUNCTION__, PTR_ERR(clnt)); | |
433 | return PTR_ERR(clnt); | |
434 | } | |
435 | ||
5006a76c DH |
436 | clp->cl_rpcclient = clnt; |
437 | return 0; | |
438 | } | |
54ceac45 DH |
439 | |
440 | /* | |
441 | * Version 2 or 3 client destruction | |
442 | */ | |
443 | static void nfs_destroy_server(struct nfs_server *server) | |
444 | { | |
445 | if (!IS_ERR(server->client_acl)) | |
446 | rpc_shutdown_client(server->client_acl); | |
447 | ||
448 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
449 | lockd_down(); /* release rpc.lockd */ | |
450 | } | |
451 | ||
452 | /* | |
453 | * Version 2 or 3 lockd setup | |
454 | */ | |
455 | static int nfs_start_lockd(struct nfs_server *server) | |
456 | { | |
457 | int error = 0; | |
458 | ||
459 | if (server->nfs_client->cl_nfsversion > 3) | |
460 | goto out; | |
461 | if (server->flags & NFS_MOUNT_NONLM) | |
462 | goto out; | |
24e36663 N |
463 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
464 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
465 | if (error < 0) |
466 | server->flags |= NFS_MOUNT_NONLM; | |
467 | else | |
468 | server->destroy = nfs_destroy_server; | |
469 | out: | |
470 | return error; | |
471 | } | |
472 | ||
473 | /* | |
474 | * Initialise an NFSv3 ACL client connection | |
475 | */ | |
476 | #ifdef CONFIG_NFS_V3_ACL | |
477 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
478 | { | |
479 | if (server->nfs_client->cl_nfsversion != 3) | |
480 | goto out_noacl; | |
481 | if (server->flags & NFS_MOUNT_NOACL) | |
482 | goto out_noacl; | |
483 | ||
484 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
485 | if (IS_ERR(server->client_acl)) | |
486 | goto out_noacl; | |
487 | ||
488 | /* No errors! Assume that Sun nfsacls are supported */ | |
489 | server->caps |= NFS_CAP_ACLS; | |
490 | return; | |
491 | ||
492 | out_noacl: | |
493 | server->caps &= ~NFS_CAP_ACLS; | |
494 | } | |
495 | #else | |
496 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
497 | { | |
498 | server->flags &= ~NFS_MOUNT_NOACL; | |
499 | server->caps &= ~NFS_CAP_ACLS; | |
500 | } | |
501 | #endif | |
502 | ||
503 | /* | |
504 | * Create a general RPC client | |
505 | */ | |
506 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
507 | { | |
508 | struct nfs_client *clp = server->nfs_client; | |
509 | ||
510 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
511 | if (IS_ERR(server->client)) { | |
512 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
513 | return PTR_ERR(server->client); | |
514 | } | |
515 | ||
516 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
517 | struct rpc_auth *auth; | |
518 | ||
519 | auth = rpcauth_create(pseudoflavour, server->client); | |
520 | if (IS_ERR(auth)) { | |
521 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
522 | return PTR_ERR(auth); | |
523 | } | |
524 | } | |
525 | server->client->cl_softrtry = 0; | |
526 | if (server->flags & NFS_MOUNT_SOFT) | |
527 | server->client->cl_softrtry = 1; | |
528 | ||
529 | server->client->cl_intr = 0; | |
530 | if (server->flags & NFS4_MOUNT_INTR) | |
531 | server->client->cl_intr = 1; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | /* | |
537 | * Initialise an NFS2 or NFS3 client | |
538 | */ | |
539 | static int nfs_init_client(struct nfs_client *clp, const struct nfs_mount_data *data) | |
540 | { | |
541 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; | |
542 | int error; | |
543 | ||
544 | if (clp->cl_cons_state == NFS_CS_READY) { | |
545 | /* the client is already initialised */ | |
546 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | /* Check NFS protocol revision and initialize RPC op vector */ | |
551 | clp->rpc_ops = &nfs_v2_clientops; | |
552 | #ifdef CONFIG_NFS_V3 | |
553 | if (clp->cl_nfsversion == 3) | |
554 | clp->rpc_ops = &nfs_v3_clientops; | |
555 | #endif | |
556 | /* | |
557 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
558 | * - RFC 2623, sec 2.3.2 | |
559 | */ | |
560 | error = nfs_create_rpc_client(clp, proto, data->timeo, data->retrans, | |
561 | RPC_AUTH_UNIX); | |
562 | if (error < 0) | |
563 | goto error; | |
564 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
565 | return 0; | |
566 | ||
567 | error: | |
568 | nfs_mark_client_ready(clp, error); | |
569 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
570 | return error; | |
571 | } | |
572 | ||
573 | /* | |
574 | * Create a version 2 or 3 client | |
575 | */ | |
576 | static int nfs_init_server(struct nfs_server *server, const struct nfs_mount_data *data) | |
577 | { | |
578 | struct nfs_client *clp; | |
579 | int error, nfsvers = 2; | |
580 | ||
581 | dprintk("--> nfs_init_server()\n"); | |
582 | ||
583 | #ifdef CONFIG_NFS_V3 | |
584 | if (data->flags & NFS_MOUNT_VER3) | |
585 | nfsvers = 3; | |
586 | #endif | |
587 | ||
588 | /* Allocate or find a client reference we can use */ | |
589 | clp = nfs_get_client(data->hostname, &data->addr, nfsvers); | |
590 | if (IS_ERR(clp)) { | |
591 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
592 | return PTR_ERR(clp); | |
593 | } | |
594 | ||
595 | error = nfs_init_client(clp, data); | |
596 | if (error < 0) | |
597 | goto error; | |
598 | ||
599 | server->nfs_client = clp; | |
600 | ||
601 | /* Initialise the client representation from the mount data */ | |
602 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
603 | ||
604 | if (data->rsize) | |
605 | server->rsize = nfs_block_size(data->rsize, NULL); | |
606 | if (data->wsize) | |
607 | server->wsize = nfs_block_size(data->wsize, NULL); | |
608 | ||
609 | server->acregmin = data->acregmin * HZ; | |
610 | server->acregmax = data->acregmax * HZ; | |
611 | server->acdirmin = data->acdirmin * HZ; | |
612 | server->acdirmax = data->acdirmax * HZ; | |
613 | ||
614 | /* Start lockd here, before we might error out */ | |
615 | error = nfs_start_lockd(server); | |
616 | if (error < 0) | |
617 | goto error; | |
618 | ||
619 | error = nfs_init_server_rpcclient(server, data->pseudoflavor); | |
620 | if (error < 0) | |
621 | goto error; | |
622 | ||
623 | server->namelen = data->namlen; | |
624 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
625 | nfs_init_server_aclclient(server); | |
626 | if (clp->cl_nfsversion == 3) { | |
627 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
628 | server->namelen = NFS3_MAXNAMLEN; | |
629 | server->caps |= NFS_CAP_READDIRPLUS; | |
630 | } else { | |
631 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
632 | server->namelen = NFS2_MAXNAMLEN; | |
633 | } | |
634 | ||
635 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); | |
636 | return 0; | |
637 | ||
638 | error: | |
639 | server->nfs_client = NULL; | |
640 | nfs_put_client(clp); | |
641 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
642 | return error; | |
643 | } | |
644 | ||
645 | /* | |
646 | * Load up the server record from information gained in an fsinfo record | |
647 | */ | |
648 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
649 | { | |
650 | unsigned long max_rpc_payload; | |
651 | ||
652 | /* Work out a lot of parameters */ | |
653 | if (server->rsize == 0) | |
654 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
655 | if (server->wsize == 0) | |
656 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
657 | ||
658 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
659 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
660 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
661 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
662 | ||
663 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
664 | if (server->rsize > max_rpc_payload) | |
665 | server->rsize = max_rpc_payload; | |
666 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
667 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
668 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
669 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
670 | ||
671 | if (server->wsize > max_rpc_payload) | |
672 | server->wsize = max_rpc_payload; | |
673 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
674 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
675 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
676 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
677 | ||
678 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
679 | if (server->dtsize > PAGE_CACHE_SIZE) | |
680 | server->dtsize = PAGE_CACHE_SIZE; | |
681 | if (server->dtsize > server->rsize) | |
682 | server->dtsize = server->rsize; | |
683 | ||
684 | if (server->flags & NFS_MOUNT_NOAC) { | |
685 | server->acregmin = server->acregmax = 0; | |
686 | server->acdirmin = server->acdirmax = 0; | |
687 | } | |
688 | ||
689 | server->maxfilesize = fsinfo->maxfilesize; | |
690 | ||
691 | /* We're airborne Set socket buffersize */ | |
692 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
693 | } | |
694 | ||
695 | /* | |
696 | * Probe filesystem information, including the FSID on v2/v3 | |
697 | */ | |
698 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
699 | { | |
700 | struct nfs_fsinfo fsinfo; | |
701 | struct nfs_client *clp = server->nfs_client; | |
702 | int error; | |
703 | ||
704 | dprintk("--> nfs_probe_fsinfo()\n"); | |
705 | ||
706 | if (clp->rpc_ops->set_capabilities != NULL) { | |
707 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
708 | if (error < 0) | |
709 | goto out_error; | |
710 | } | |
711 | ||
712 | fsinfo.fattr = fattr; | |
713 | nfs_fattr_init(fattr); | |
714 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
715 | if (error < 0) | |
716 | goto out_error; | |
717 | ||
718 | nfs_server_set_fsinfo(server, &fsinfo); | |
719 | ||
720 | /* Get some general file system info */ | |
721 | if (server->namelen == 0) { | |
722 | struct nfs_pathconf pathinfo; | |
723 | ||
724 | pathinfo.fattr = fattr; | |
725 | nfs_fattr_init(fattr); | |
726 | ||
727 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
728 | server->namelen = pathinfo.max_namelen; | |
729 | } | |
730 | ||
731 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
732 | return 0; | |
733 | ||
734 | out_error: | |
735 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
736 | return error; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Copy useful information when duplicating a server record | |
741 | */ | |
742 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
743 | { | |
744 | target->flags = source->flags; | |
745 | target->acregmin = source->acregmin; | |
746 | target->acregmax = source->acregmax; | |
747 | target->acdirmin = source->acdirmin; | |
748 | target->acdirmax = source->acdirmax; | |
749 | target->caps = source->caps; | |
750 | } | |
751 | ||
752 | /* | |
753 | * Allocate and initialise a server record | |
754 | */ | |
755 | static struct nfs_server *nfs_alloc_server(void) | |
756 | { | |
757 | struct nfs_server *server; | |
758 | ||
759 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
760 | if (!server) | |
761 | return NULL; | |
762 | ||
763 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
764 | ||
765 | /* Zero out the NFS state stuff */ | |
766 | INIT_LIST_HEAD(&server->client_link); | |
767 | INIT_LIST_HEAD(&server->master_link); | |
768 | ||
769 | server->io_stats = nfs_alloc_iostats(); | |
770 | if (!server->io_stats) { | |
771 | kfree(server); | |
772 | return NULL; | |
773 | } | |
774 | ||
775 | return server; | |
776 | } | |
777 | ||
778 | /* | |
779 | * Free up a server record | |
780 | */ | |
781 | void nfs_free_server(struct nfs_server *server) | |
782 | { | |
783 | dprintk("--> nfs_free_server()\n"); | |
784 | ||
785 | spin_lock(&nfs_client_lock); | |
786 | list_del(&server->client_link); | |
787 | list_del(&server->master_link); | |
788 | spin_unlock(&nfs_client_lock); | |
789 | ||
790 | if (server->destroy != NULL) | |
791 | server->destroy(server); | |
792 | if (!IS_ERR(server->client)) | |
793 | rpc_shutdown_client(server->client); | |
794 | ||
795 | nfs_put_client(server->nfs_client); | |
796 | ||
797 | nfs_free_iostats(server->io_stats); | |
798 | kfree(server); | |
799 | nfs_release_automount_timer(); | |
800 | dprintk("<-- nfs_free_server()\n"); | |
801 | } | |
802 | ||
803 | /* | |
804 | * Create a version 2 or 3 volume record | |
805 | * - keyed on server and FSID | |
806 | */ | |
807 | struct nfs_server *nfs_create_server(const struct nfs_mount_data *data, | |
808 | struct nfs_fh *mntfh) | |
809 | { | |
810 | struct nfs_server *server; | |
811 | struct nfs_fattr fattr; | |
812 | int error; | |
813 | ||
814 | server = nfs_alloc_server(); | |
815 | if (!server) | |
816 | return ERR_PTR(-ENOMEM); | |
817 | ||
818 | /* Get a client representation */ | |
819 | error = nfs_init_server(server, data); | |
820 | if (error < 0) | |
821 | goto error; | |
822 | ||
823 | BUG_ON(!server->nfs_client); | |
824 | BUG_ON(!server->nfs_client->rpc_ops); | |
825 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
826 | ||
827 | /* Probe the root fh to retrieve its FSID */ | |
828 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
829 | if (error < 0) | |
830 | goto error; | |
831 | if (!(fattr.valid & NFS_ATTR_FATTR)) { | |
832 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
833 | if (error < 0) { | |
834 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
835 | goto error; | |
836 | } | |
837 | } | |
838 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
839 | ||
6daabf1b DH |
840 | dprintk("Server FSID: %llx:%llx\n", |
841 | (unsigned long long) server->fsid.major, | |
842 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
843 | |
844 | BUG_ON(!server->nfs_client); | |
845 | BUG_ON(!server->nfs_client->rpc_ops); | |
846 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
847 | ||
848 | spin_lock(&nfs_client_lock); | |
849 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
850 | list_add_tail(&server->master_link, &nfs_volume_list); | |
851 | spin_unlock(&nfs_client_lock); | |
852 | ||
853 | server->mount_time = jiffies; | |
854 | return server; | |
855 | ||
856 | error: | |
857 | nfs_free_server(server); | |
858 | return ERR_PTR(error); | |
859 | } | |
860 | ||
861 | #ifdef CONFIG_NFS_V4 | |
862 | /* | |
863 | * Initialise an NFS4 client record | |
864 | */ | |
865 | static int nfs4_init_client(struct nfs_client *clp, | |
866 | int proto, int timeo, int retrans, | |
867 | rpc_authflavor_t authflavour) | |
868 | { | |
869 | int error; | |
870 | ||
871 | if (clp->cl_cons_state == NFS_CS_READY) { | |
872 | /* the client is initialised already */ | |
873 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
874 | return 0; | |
875 | } | |
876 | ||
877 | /* Check NFS protocol revision and initialize RPC op vector */ | |
878 | clp->rpc_ops = &nfs_v4_clientops; | |
879 | ||
880 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour); | |
881 | if (error < 0) | |
882 | goto error; | |
883 | ||
884 | error = nfs_idmap_new(clp); | |
885 | if (error < 0) { | |
886 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
887 | __FUNCTION__, error); | |
54ceac45 DH |
888 | goto error; |
889 | } | |
9c5bf38d | 890 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
891 | |
892 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
893 | return 0; | |
894 | ||
895 | error: | |
896 | nfs_mark_client_ready(clp, error); | |
897 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
898 | return error; | |
899 | } | |
900 | ||
901 | /* | |
902 | * Set up an NFS4 client | |
903 | */ | |
904 | static int nfs4_set_client(struct nfs_server *server, | |
905 | const char *hostname, const struct sockaddr_in *addr, | |
906 | rpc_authflavor_t authflavour, | |
907 | int proto, int timeo, int retrans) | |
908 | { | |
909 | struct nfs_client *clp; | |
910 | int error; | |
911 | ||
912 | dprintk("--> nfs4_set_client()\n"); | |
913 | ||
914 | /* Allocate or find a client reference we can use */ | |
915 | clp = nfs_get_client(hostname, addr, 4); | |
916 | if (IS_ERR(clp)) { | |
917 | error = PTR_ERR(clp); | |
918 | goto error; | |
919 | } | |
920 | error = nfs4_init_client(clp, proto, timeo, retrans, authflavour); | |
921 | if (error < 0) | |
922 | goto error_put; | |
923 | ||
924 | server->nfs_client = clp; | |
925 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
926 | return 0; | |
927 | ||
928 | error_put: | |
929 | nfs_put_client(clp); | |
930 | error: | |
931 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
932 | return error; | |
933 | } | |
934 | ||
935 | /* | |
936 | * Create a version 4 volume record | |
937 | */ | |
938 | static int nfs4_init_server(struct nfs_server *server, | |
939 | const struct nfs4_mount_data *data, rpc_authflavor_t authflavour) | |
940 | { | |
941 | int error; | |
942 | ||
943 | dprintk("--> nfs4_init_server()\n"); | |
944 | ||
945 | /* Initialise the client representation from the mount data */ | |
946 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
947 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
948 | ||
949 | if (data->rsize) | |
950 | server->rsize = nfs_block_size(data->rsize, NULL); | |
951 | if (data->wsize) | |
952 | server->wsize = nfs_block_size(data->wsize, NULL); | |
953 | ||
954 | server->acregmin = data->acregmin * HZ; | |
955 | server->acregmax = data->acregmax * HZ; | |
956 | server->acdirmin = data->acdirmin * HZ; | |
957 | server->acdirmax = data->acdirmax * HZ; | |
958 | ||
959 | error = nfs_init_server_rpcclient(server, authflavour); | |
960 | ||
961 | /* Done */ | |
962 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
963 | return error; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Create a version 4 volume record | |
968 | * - keyed on server and FSID | |
969 | */ | |
970 | struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data, | |
971 | const char *hostname, | |
972 | const struct sockaddr_in *addr, | |
973 | const char *mntpath, | |
974 | const char *ip_addr, | |
975 | rpc_authflavor_t authflavour, | |
976 | struct nfs_fh *mntfh) | |
977 | { | |
978 | struct nfs_fattr fattr; | |
979 | struct nfs_server *server; | |
980 | int error; | |
981 | ||
982 | dprintk("--> nfs4_create_server()\n"); | |
983 | ||
984 | server = nfs_alloc_server(); | |
985 | if (!server) | |
986 | return ERR_PTR(-ENOMEM); | |
987 | ||
988 | /* Get a client record */ | |
989 | error = nfs4_set_client(server, hostname, addr, authflavour, | |
990 | data->proto, data->timeo, data->retrans); | |
991 | if (error < 0) | |
992 | goto error; | |
993 | ||
994 | /* set up the general RPC client */ | |
995 | error = nfs4_init_server(server, data, authflavour); | |
996 | if (error < 0) | |
997 | goto error; | |
998 | ||
999 | BUG_ON(!server->nfs_client); | |
1000 | BUG_ON(!server->nfs_client->rpc_ops); | |
1001 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1002 | ||
1003 | /* Probe the root fh to retrieve its FSID */ | |
1004 | error = nfs4_path_walk(server, mntfh, mntpath); | |
1005 | if (error < 0) | |
1006 | goto error; | |
1007 | ||
6daabf1b DH |
1008 | dprintk("Server FSID: %llx:%llx\n", |
1009 | (unsigned long long) server->fsid.major, | |
1010 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1011 | dprintk("Mount FH: %d\n", mntfh->size); |
1012 | ||
1013 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1014 | if (error < 0) | |
1015 | goto error; | |
1016 | ||
1017 | BUG_ON(!server->nfs_client); | |
1018 | BUG_ON(!server->nfs_client->rpc_ops); | |
1019 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1020 | ||
1021 | spin_lock(&nfs_client_lock); | |
1022 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1023 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1024 | spin_unlock(&nfs_client_lock); | |
1025 | ||
1026 | server->mount_time = jiffies; | |
1027 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1028 | return server; | |
1029 | ||
1030 | error: | |
1031 | nfs_free_server(server); | |
1032 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1033 | return ERR_PTR(error); | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Create an NFS4 referral server record | |
1038 | */ | |
1039 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1040 | struct nfs_fh *fh) | |
1041 | { | |
1042 | struct nfs_client *parent_client; | |
1043 | struct nfs_server *server, *parent_server; | |
1044 | struct nfs_fattr fattr; | |
1045 | int error; | |
1046 | ||
1047 | dprintk("--> nfs4_create_referral_server()\n"); | |
1048 | ||
1049 | server = nfs_alloc_server(); | |
1050 | if (!server) | |
1051 | return ERR_PTR(-ENOMEM); | |
1052 | ||
1053 | parent_server = NFS_SB(data->sb); | |
1054 | parent_client = parent_server->nfs_client; | |
1055 | ||
1056 | /* Get a client representation. | |
1057 | * Note: NFSv4 always uses TCP, */ | |
1058 | error = nfs4_set_client(server, data->hostname, data->addr, | |
1059 | data->authflavor, | |
1060 | parent_server->client->cl_xprt->prot, | |
1061 | parent_client->retrans_timeo, | |
1062 | parent_client->retrans_count); | |
297de4f6 | 1063 | if (error < 0) |
1064 | goto error; | |
54ceac45 DH |
1065 | |
1066 | /* Initialise the client representation from the parent server */ | |
1067 | nfs_server_copy_userdata(server, parent_server); | |
1068 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1069 | ||
1070 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1071 | if (error < 0) | |
1072 | goto error; | |
1073 | ||
1074 | BUG_ON(!server->nfs_client); | |
1075 | BUG_ON(!server->nfs_client->rpc_ops); | |
1076 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1077 | ||
1078 | /* probe the filesystem info for this server filesystem */ | |
1079 | error = nfs_probe_fsinfo(server, fh, &fattr); | |
1080 | if (error < 0) | |
1081 | goto error; | |
1082 | ||
1083 | dprintk("Referral FSID: %llx:%llx\n", | |
6daabf1b DH |
1084 | (unsigned long long) server->fsid.major, |
1085 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1086 | |
1087 | spin_lock(&nfs_client_lock); | |
1088 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1089 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1090 | spin_unlock(&nfs_client_lock); | |
1091 | ||
1092 | server->mount_time = jiffies; | |
1093 | ||
1094 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1095 | return server; | |
1096 | ||
1097 | error: | |
1098 | nfs_free_server(server); | |
1099 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1100 | return ERR_PTR(error); | |
1101 | } | |
1102 | ||
1103 | #endif /* CONFIG_NFS_V4 */ | |
1104 | ||
1105 | /* | |
1106 | * Clone an NFS2, NFS3 or NFS4 server record | |
1107 | */ | |
1108 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1109 | struct nfs_fh *fh, | |
1110 | struct nfs_fattr *fattr) | |
1111 | { | |
1112 | struct nfs_server *server; | |
1113 | struct nfs_fattr fattr_fsinfo; | |
1114 | int error; | |
1115 | ||
1116 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1117 | (unsigned long long) fattr->fsid.major, |
1118 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1119 | |
1120 | server = nfs_alloc_server(); | |
1121 | if (!server) | |
1122 | return ERR_PTR(-ENOMEM); | |
1123 | ||
1124 | /* Copy data from the source */ | |
1125 | server->nfs_client = source->nfs_client; | |
1126 | atomic_inc(&server->nfs_client->cl_count); | |
1127 | nfs_server_copy_userdata(server, source); | |
1128 | ||
1129 | server->fsid = fattr->fsid; | |
1130 | ||
1131 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1132 | if (error < 0) | |
1133 | goto out_free_server; | |
1134 | if (!IS_ERR(source->client_acl)) | |
1135 | nfs_init_server_aclclient(server); | |
1136 | ||
1137 | /* probe the filesystem info for this server filesystem */ | |
1138 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1139 | if (error < 0) | |
1140 | goto out_free_server; | |
1141 | ||
1142 | dprintk("Cloned FSID: %llx:%llx\n", | |
6daabf1b DH |
1143 | (unsigned long long) server->fsid.major, |
1144 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1145 | |
1146 | error = nfs_start_lockd(server); | |
1147 | if (error < 0) | |
1148 | goto out_free_server; | |
1149 | ||
1150 | spin_lock(&nfs_client_lock); | |
1151 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1152 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1153 | spin_unlock(&nfs_client_lock); | |
1154 | ||
1155 | server->mount_time = jiffies; | |
1156 | ||
1157 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1158 | return server; | |
1159 | ||
1160 | out_free_server: | |
1161 | nfs_free_server(server); | |
1162 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1163 | return ERR_PTR(error); | |
1164 | } | |
6aaca566 DH |
1165 | |
1166 | #ifdef CONFIG_PROC_FS | |
1167 | static struct proc_dir_entry *proc_fs_nfs; | |
1168 | ||
1169 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1170 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1171 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1172 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1173 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1174 | ||
1175 | static struct seq_operations nfs_server_list_ops = { | |
1176 | .start = nfs_server_list_start, | |
1177 | .next = nfs_server_list_next, | |
1178 | .stop = nfs_server_list_stop, | |
1179 | .show = nfs_server_list_show, | |
1180 | }; | |
1181 | ||
1182 | static struct file_operations nfs_server_list_fops = { | |
1183 | .open = nfs_server_list_open, | |
1184 | .read = seq_read, | |
1185 | .llseek = seq_lseek, | |
1186 | .release = seq_release, | |
1187 | }; | |
1188 | ||
1189 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1190 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1191 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1192 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1193 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1194 | ||
1195 | static struct seq_operations nfs_volume_list_ops = { | |
1196 | .start = nfs_volume_list_start, | |
1197 | .next = nfs_volume_list_next, | |
1198 | .stop = nfs_volume_list_stop, | |
1199 | .show = nfs_volume_list_show, | |
1200 | }; | |
1201 | ||
1202 | static struct file_operations nfs_volume_list_fops = { | |
1203 | .open = nfs_volume_list_open, | |
1204 | .read = seq_read, | |
1205 | .llseek = seq_lseek, | |
1206 | .release = seq_release, | |
1207 | }; | |
1208 | ||
1209 | /* | |
1210 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1211 | * we're dealing | |
1212 | */ | |
1213 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1214 | { | |
1215 | struct seq_file *m; | |
1216 | int ret; | |
1217 | ||
1218 | ret = seq_open(file, &nfs_server_list_ops); | |
1219 | if (ret < 0) | |
1220 | return ret; | |
1221 | ||
1222 | m = file->private_data; | |
1223 | m->private = PDE(inode)->data; | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * set up the iterator to start reading from the server list and return the first item | |
1230 | */ | |
1231 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1232 | { | |
1233 | struct list_head *_p; | |
1234 | loff_t pos = *_pos; | |
1235 | ||
1236 | /* lock the list against modification */ | |
1237 | spin_lock(&nfs_client_lock); | |
1238 | ||
1239 | /* allow for the header line */ | |
1240 | if (!pos) | |
1241 | return SEQ_START_TOKEN; | |
1242 | pos--; | |
1243 | ||
1244 | /* find the n'th element in the list */ | |
1245 | list_for_each(_p, &nfs_client_list) | |
1246 | if (!pos--) | |
1247 | break; | |
1248 | ||
1249 | return _p != &nfs_client_list ? _p : NULL; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * move to next server | |
1254 | */ | |
1255 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1256 | { | |
1257 | struct list_head *_p; | |
1258 | ||
1259 | (*pos)++; | |
1260 | ||
1261 | _p = v; | |
1262 | _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next; | |
1263 | ||
1264 | return _p != &nfs_client_list ? _p : NULL; | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * clean up after reading from the transports list | |
1269 | */ | |
1270 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1271 | { | |
1272 | spin_unlock(&nfs_client_lock); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * display a header line followed by a load of call lines | |
1277 | */ | |
1278 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1279 | { | |
1280 | struct nfs_client *clp; | |
1281 | ||
1282 | /* display header on line 1 */ | |
1283 | if (v == SEQ_START_TOKEN) { | |
1284 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | /* display one transport per line on subsequent lines */ | |
1289 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1290 | ||
1291 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1292 | clp->cl_nfsversion, | |
1293 | NIPQUAD(clp->cl_addr.sin_addr), | |
1294 | ntohs(clp->cl_addr.sin_port), | |
1295 | atomic_read(&clp->cl_count), | |
1296 | clp->cl_hostname); | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1303 | */ | |
1304 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1305 | { | |
1306 | struct seq_file *m; | |
1307 | int ret; | |
1308 | ||
1309 | ret = seq_open(file, &nfs_volume_list_ops); | |
1310 | if (ret < 0) | |
1311 | return ret; | |
1312 | ||
1313 | m = file->private_data; | |
1314 | m->private = PDE(inode)->data; | |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * set up the iterator to start reading from the volume list and return the first item | |
1321 | */ | |
1322 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1323 | { | |
1324 | struct list_head *_p; | |
1325 | loff_t pos = *_pos; | |
1326 | ||
1327 | /* lock the list against modification */ | |
1328 | spin_lock(&nfs_client_lock); | |
1329 | ||
1330 | /* allow for the header line */ | |
1331 | if (!pos) | |
1332 | return SEQ_START_TOKEN; | |
1333 | pos--; | |
1334 | ||
1335 | /* find the n'th element in the list */ | |
1336 | list_for_each(_p, &nfs_volume_list) | |
1337 | if (!pos--) | |
1338 | break; | |
1339 | ||
1340 | return _p != &nfs_volume_list ? _p : NULL; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * move to next volume | |
1345 | */ | |
1346 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1347 | { | |
1348 | struct list_head *_p; | |
1349 | ||
1350 | (*pos)++; | |
1351 | ||
1352 | _p = v; | |
1353 | _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next; | |
1354 | ||
1355 | return _p != &nfs_volume_list ? _p : NULL; | |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * clean up after reading from the transports list | |
1360 | */ | |
1361 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1362 | { | |
1363 | spin_unlock(&nfs_client_lock); | |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | * display a header line followed by a load of call lines | |
1368 | */ | |
1369 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1370 | { | |
1371 | struct nfs_server *server; | |
1372 | struct nfs_client *clp; | |
1373 | char dev[8], fsid[17]; | |
1374 | ||
1375 | /* display header on line 1 */ | |
1376 | if (v == SEQ_START_TOKEN) { | |
1377 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); | |
1378 | return 0; | |
1379 | } | |
1380 | /* display one transport per line on subsequent lines */ | |
1381 | server = list_entry(v, struct nfs_server, master_link); | |
1382 | clp = server->nfs_client; | |
1383 | ||
1384 | snprintf(dev, 8, "%u:%u", | |
1385 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1386 | ||
1387 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1388 | (unsigned long long) server->fsid.major, |
1389 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1390 | |
1391 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1392 | clp->cl_nfsversion, | |
1393 | NIPQUAD(clp->cl_addr.sin_addr), | |
1394 | ntohs(clp->cl_addr.sin_port), | |
1395 | dev, | |
1396 | fsid); | |
1397 | ||
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * initialise the /proc/fs/nfsfs/ directory | |
1403 | */ | |
1404 | int __init nfs_fs_proc_init(void) | |
1405 | { | |
1406 | struct proc_dir_entry *p; | |
1407 | ||
1408 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1409 | if (!proc_fs_nfs) | |
1410 | goto error_0; | |
1411 | ||
1412 | proc_fs_nfs->owner = THIS_MODULE; | |
1413 | ||
1414 | /* a file of servers with which we're dealing */ | |
1415 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1416 | if (!p) | |
1417 | goto error_1; | |
1418 | ||
1419 | p->proc_fops = &nfs_server_list_fops; | |
1420 | p->owner = THIS_MODULE; | |
1421 | ||
1422 | /* a file of volumes that we have mounted */ | |
1423 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1424 | if (!p) | |
1425 | goto error_2; | |
1426 | ||
1427 | p->proc_fops = &nfs_volume_list_fops; | |
1428 | p->owner = THIS_MODULE; | |
1429 | return 0; | |
1430 | ||
1431 | error_2: | |
1432 | remove_proc_entry("servers", proc_fs_nfs); | |
1433 | error_1: | |
1434 | remove_proc_entry("nfsfs", proc_root_fs); | |
1435 | error_0: | |
1436 | return -ENOMEM; | |
1437 | } | |
1438 | ||
1439 | /* | |
1440 | * clean up the /proc/fs/nfsfs/ directory | |
1441 | */ | |
1442 | void nfs_fs_proc_exit(void) | |
1443 | { | |
1444 | remove_proc_entry("volumes", proc_fs_nfs); | |
1445 | remove_proc_entry("servers", proc_fs_nfs); | |
1446 | remove_proc_entry("nfsfs", proc_root_fs); | |
1447 | } | |
1448 | ||
1449 | #endif /* CONFIG_PROC_FS */ |