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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> | |
15 | ||
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> | |
30 | #include <linux/smp_lock.h> | |
31 | #include <linux/seq_file.h> | |
32 | #include <linux/mount.h> | |
33 | #include <linux/nfs_idmap.h> | |
34 | #include <linux/vfs.h> | |
35 | #include <linux/inet.h> | |
36 | #include <linux/nfs_xdr.h> | |
37 | ||
38 | #include <asm/system.h> | |
39 | ||
40 | #include "nfs4_fs.h" | |
41 | #include "callback.h" | |
42 | #include "delegation.h" | |
43 | #include "iostat.h" | |
44 | #include "internal.h" | |
45 | ||
46 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
47 | ||
48 | static DEFINE_SPINLOCK(nfs_client_lock); | |
49 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 50 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
51 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
52 | ||
5006a76c DH |
53 | /* |
54 | * RPC cruft for NFS | |
55 | */ | |
56 | static struct rpc_version *nfs_version[5] = { | |
57 | [2] = &nfs_version2, | |
58 | #ifdef CONFIG_NFS_V3 | |
59 | [3] = &nfs_version3, | |
60 | #endif | |
61 | #ifdef CONFIG_NFS_V4 | |
62 | [4] = &nfs_version4, | |
63 | #endif | |
64 | }; | |
65 | ||
66 | struct rpc_program nfs_program = { | |
67 | .name = "nfs", | |
68 | .number = NFS_PROGRAM, | |
69 | .nrvers = ARRAY_SIZE(nfs_version), | |
70 | .version = nfs_version, | |
71 | .stats = &nfs_rpcstat, | |
72 | .pipe_dir_name = "/nfs", | |
73 | }; | |
74 | ||
75 | struct rpc_stat nfs_rpcstat = { | |
76 | .program = &nfs_program | |
77 | }; | |
78 | ||
79 | ||
80 | #ifdef CONFIG_NFS_V3_ACL | |
81 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
82 | static struct rpc_version * nfsacl_version[] = { | |
83 | [3] = &nfsacl_version3, | |
84 | }; | |
85 | ||
86 | struct rpc_program nfsacl_program = { | |
87 | .name = "nfsacl", | |
88 | .number = NFS_ACL_PROGRAM, | |
89 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
90 | .version = nfsacl_version, | |
91 | .stats = &nfsacl_rpcstat, | |
92 | }; | |
93 | #endif /* CONFIG_NFS_V3_ACL */ | |
94 | ||
24c8dbbb DH |
95 | /* |
96 | * Allocate a shared client record | |
97 | * | |
98 | * Since these are allocated/deallocated very rarely, we don't | |
99 | * bother putting them in a slab cache... | |
100 | */ | |
101 | static struct nfs_client *nfs_alloc_client(const char *hostname, | |
102 | const struct sockaddr_in *addr, | |
103 | int nfsversion) | |
104 | { | |
105 | struct nfs_client *clp; | |
106 | int error; | |
107 | ||
108 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
109 | goto error_0; | |
110 | ||
111 | error = rpciod_up(); | |
112 | if (error < 0) { | |
113 | dprintk("%s: couldn't start rpciod! Error = %d\n", | |
114 | __FUNCTION__, error); | |
24c8dbbb DH |
115 | goto error_1; |
116 | } | |
9c5bf38d | 117 | __set_bit(NFS_CS_RPCIOD, &clp->cl_res_state); |
24c8dbbb DH |
118 | |
119 | if (nfsversion == 4) { | |
120 | if (nfs_callback_up() < 0) | |
121 | goto error_2; | |
122 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
123 | } | |
124 | ||
125 | atomic_set(&clp->cl_count, 1); | |
126 | clp->cl_cons_state = NFS_CS_INITING; | |
127 | ||
128 | clp->cl_nfsversion = nfsversion; | |
129 | memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr)); | |
130 | ||
131 | if (hostname) { | |
132 | clp->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
133 | if (!clp->cl_hostname) | |
134 | goto error_3; | |
135 | } | |
136 | ||
137 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
138 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
139 | ||
140 | #ifdef CONFIG_NFS_V4 | |
141 | init_rwsem(&clp->cl_sem); | |
142 | INIT_LIST_HEAD(&clp->cl_delegations); | |
143 | INIT_LIST_HEAD(&clp->cl_state_owners); | |
144 | INIT_LIST_HEAD(&clp->cl_unused); | |
145 | spin_lock_init(&clp->cl_lock); | |
146 | INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp); | |
147 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
148 | clp->cl_boot_time = CURRENT_TIME; | |
149 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
150 | #endif | |
151 | ||
152 | return clp; | |
153 | ||
154 | error_3: | |
9c5bf38d TM |
155 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
156 | nfs_callback_down(); | |
24c8dbbb DH |
157 | error_2: |
158 | rpciod_down(); | |
159 | __clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state); | |
160 | error_1: | |
161 | kfree(clp); | |
162 | error_0: | |
163 | return NULL; | |
164 | } | |
165 | ||
5dd3177a TM |
166 | static void nfs4_shutdown_client(struct nfs_client *clp) |
167 | { | |
168 | #ifdef CONFIG_NFS_V4 | |
169 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
170 | nfs4_kill_renewd(clp); | |
171 | while (!list_empty(&clp->cl_unused)) { | |
172 | struct nfs4_state_owner *sp; | |
173 | ||
174 | sp = list_entry(clp->cl_unused.next, | |
175 | struct nfs4_state_owner, | |
176 | so_list); | |
177 | list_del(&sp->so_list); | |
178 | kfree(sp); | |
179 | } | |
180 | BUG_ON(!list_empty(&clp->cl_state_owners)); | |
181 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
182 | nfs_idmap_delete(clp); | |
183 | #endif | |
184 | } | |
185 | ||
24c8dbbb DH |
186 | /* |
187 | * Destroy a shared client record | |
188 | */ | |
189 | static void nfs_free_client(struct nfs_client *clp) | |
190 | { | |
191 | dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion); | |
192 | ||
5dd3177a | 193 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
194 | |
195 | /* -EIO all pending I/O */ | |
196 | if (!IS_ERR(clp->cl_rpcclient)) | |
197 | rpc_shutdown_client(clp->cl_rpcclient); | |
198 | ||
199 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
200 | nfs_callback_down(); | |
201 | ||
202 | if (__test_and_clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state)) | |
9c5bf38d | 203 | rpciod_down(); |
24c8dbbb DH |
204 | |
205 | kfree(clp->cl_hostname); | |
206 | kfree(clp); | |
207 | ||
208 | dprintk("<-- nfs_free_client()\n"); | |
209 | } | |
210 | ||
211 | /* | |
212 | * Release a reference to a shared client record | |
213 | */ | |
214 | void nfs_put_client(struct nfs_client *clp) | |
215 | { | |
27ba8512 DH |
216 | if (!clp) |
217 | return; | |
218 | ||
24c8dbbb DH |
219 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
220 | ||
221 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
222 | list_del(&clp->cl_share_link); | |
223 | spin_unlock(&nfs_client_lock); | |
224 | ||
225 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
226 | ||
227 | nfs_free_client(clp); | |
228 | } | |
229 | } | |
230 | ||
231 | /* | |
232 | * Find a client by address | |
233 | * - caller must hold nfs_client_lock | |
234 | */ | |
235 | static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
236 | { | |
237 | struct nfs_client *clp; | |
238 | ||
239 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
240 | /* Different NFS versions cannot share the same nfs_client */ | |
241 | if (clp->cl_nfsversion != nfsversion) | |
242 | continue; | |
243 | ||
244 | if (memcmp(&clp->cl_addr.sin_addr, &addr->sin_addr, | |
245 | sizeof(clp->cl_addr.sin_addr)) != 0) | |
246 | continue; | |
247 | ||
248 | if (clp->cl_addr.sin_port == addr->sin_port) | |
249 | goto found; | |
250 | } | |
251 | ||
252 | return NULL; | |
253 | ||
254 | found: | |
255 | atomic_inc(&clp->cl_count); | |
256 | return clp; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Find a client by IP address and protocol version | |
261 | * - returns NULL if no such client | |
262 | */ | |
263 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
264 | { | |
265 | struct nfs_client *clp; | |
266 | ||
267 | spin_lock(&nfs_client_lock); | |
268 | clp = __nfs_find_client(addr, nfsversion); | |
269 | spin_unlock(&nfs_client_lock); | |
270 | ||
2dec5146 | 271 | BUG_ON(clp && clp->cl_cons_state == 0); |
24c8dbbb DH |
272 | |
273 | return clp; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Look up a client by IP address and protocol version | |
278 | * - creates a new record if one doesn't yet exist | |
279 | */ | |
54ceac45 DH |
280 | static struct nfs_client *nfs_get_client(const char *hostname, |
281 | const struct sockaddr_in *addr, | |
282 | int nfsversion) | |
24c8dbbb DH |
283 | { |
284 | struct nfs_client *clp, *new = NULL; | |
285 | int error; | |
286 | ||
287 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n", | |
288 | hostname ?: "", NIPQUAD(addr->sin_addr), | |
289 | addr->sin_port, nfsversion); | |
290 | ||
291 | /* see if the client already exists */ | |
292 | do { | |
293 | spin_lock(&nfs_client_lock); | |
294 | ||
295 | clp = __nfs_find_client(addr, nfsversion); | |
296 | if (clp) | |
297 | goto found_client; | |
298 | if (new) | |
299 | goto install_client; | |
300 | ||
301 | spin_unlock(&nfs_client_lock); | |
302 | ||
303 | new = nfs_alloc_client(hostname, addr, nfsversion); | |
304 | } while (new); | |
305 | ||
306 | return ERR_PTR(-ENOMEM); | |
307 | ||
308 | /* install a new client and return with it unready */ | |
309 | install_client: | |
310 | clp = new; | |
311 | list_add(&clp->cl_share_link, &nfs_client_list); | |
312 | spin_unlock(&nfs_client_lock); | |
313 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
314 | return clp; | |
315 | ||
316 | /* found an existing client | |
317 | * - make sure it's ready before returning | |
318 | */ | |
319 | found_client: | |
320 | spin_unlock(&nfs_client_lock); | |
321 | ||
322 | if (new) | |
323 | nfs_free_client(new); | |
324 | ||
325 | if (clp->cl_cons_state == NFS_CS_INITING) { | |
326 | DECLARE_WAITQUEUE(myself, current); | |
327 | ||
328 | add_wait_queue(&nfs_client_active_wq, &myself); | |
329 | ||
330 | for (;;) { | |
331 | set_current_state(TASK_INTERRUPTIBLE); | |
332 | if (signal_pending(current) || | |
ca4aa096 | 333 | clp->cl_cons_state != NFS_CS_INITING) |
24c8dbbb DH |
334 | break; |
335 | schedule(); | |
336 | } | |
337 | ||
338 | remove_wait_queue(&nfs_client_active_wq, &myself); | |
339 | ||
340 | if (signal_pending(current)) { | |
341 | nfs_put_client(clp); | |
342 | return ERR_PTR(-ERESTARTSYS); | |
343 | } | |
344 | } | |
345 | ||
346 | if (clp->cl_cons_state < NFS_CS_READY) { | |
347 | error = clp->cl_cons_state; | |
348 | nfs_put_client(clp); | |
349 | return ERR_PTR(error); | |
350 | } | |
351 | ||
54ceac45 DH |
352 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
353 | ||
24c8dbbb DH |
354 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
355 | return clp; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Mark a server as ready or failed | |
360 | */ | |
54ceac45 | 361 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
362 | { |
363 | clp->cl_cons_state = state; | |
364 | wake_up_all(&nfs_client_active_wq); | |
365 | } | |
5006a76c DH |
366 | |
367 | /* | |
368 | * Initialise the timeout values for a connection | |
369 | */ | |
370 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
371 | unsigned int timeo, unsigned int retrans) | |
372 | { | |
373 | to->to_initval = timeo * HZ / 10; | |
374 | to->to_retries = retrans; | |
375 | if (!to->to_retries) | |
376 | to->to_retries = 2; | |
377 | ||
378 | switch (proto) { | |
379 | case IPPROTO_TCP: | |
380 | if (!to->to_initval) | |
381 | to->to_initval = 60 * HZ; | |
382 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
383 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
384 | to->to_increment = to->to_initval; | |
385 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
386 | to->to_exponential = 0; | |
387 | break; | |
388 | case IPPROTO_UDP: | |
389 | default: | |
390 | if (!to->to_initval) | |
391 | to->to_initval = 11 * HZ / 10; | |
392 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
393 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
394 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
395 | to->to_exponential = 1; | |
396 | break; | |
397 | } | |
398 | } | |
399 | ||
400 | /* | |
401 | * Create an RPC client handle | |
402 | */ | |
54ceac45 DH |
403 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
404 | unsigned int timeo, | |
405 | unsigned int retrans, | |
406 | rpc_authflavor_t flavor) | |
5006a76c DH |
407 | { |
408 | struct rpc_timeout timeparms; | |
5006a76c | 409 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
410 | struct rpc_create_args args = { |
411 | .protocol = proto, | |
412 | .address = (struct sockaddr *)&clp->cl_addr, | |
413 | .addrsize = sizeof(clp->cl_addr), | |
414 | .timeout = &timeparms, | |
415 | .servername = clp->cl_hostname, | |
416 | .program = &nfs_program, | |
417 | .version = clp->rpc_ops->version, | |
418 | .authflavor = flavor, | |
419 | }; | |
5006a76c DH |
420 | |
421 | if (!IS_ERR(clp->cl_rpcclient)) | |
422 | return 0; | |
423 | ||
424 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
425 | clp->retrans_timeo = timeparms.to_initval; | |
426 | clp->retrans_count = timeparms.to_retries; | |
427 | ||
41877d20 | 428 | clnt = rpc_create(&args); |
5006a76c DH |
429 | if (IS_ERR(clnt)) { |
430 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
431 | __FUNCTION__, PTR_ERR(clnt)); | |
432 | return PTR_ERR(clnt); | |
433 | } | |
434 | ||
5006a76c DH |
435 | clp->cl_rpcclient = clnt; |
436 | return 0; | |
437 | } | |
54ceac45 DH |
438 | |
439 | /* | |
440 | * Version 2 or 3 client destruction | |
441 | */ | |
442 | static void nfs_destroy_server(struct nfs_server *server) | |
443 | { | |
444 | if (!IS_ERR(server->client_acl)) | |
445 | rpc_shutdown_client(server->client_acl); | |
446 | ||
447 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
448 | lockd_down(); /* release rpc.lockd */ | |
449 | } | |
450 | ||
451 | /* | |
452 | * Version 2 or 3 lockd setup | |
453 | */ | |
454 | static int nfs_start_lockd(struct nfs_server *server) | |
455 | { | |
456 | int error = 0; | |
457 | ||
458 | if (server->nfs_client->cl_nfsversion > 3) | |
459 | goto out; | |
460 | if (server->flags & NFS_MOUNT_NONLM) | |
461 | goto out; | |
24e36663 N |
462 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
463 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
464 | if (error < 0) |
465 | server->flags |= NFS_MOUNT_NONLM; | |
466 | else | |
467 | server->destroy = nfs_destroy_server; | |
468 | out: | |
469 | return error; | |
470 | } | |
471 | ||
472 | /* | |
473 | * Initialise an NFSv3 ACL client connection | |
474 | */ | |
475 | #ifdef CONFIG_NFS_V3_ACL | |
476 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
477 | { | |
478 | if (server->nfs_client->cl_nfsversion != 3) | |
479 | goto out_noacl; | |
480 | if (server->flags & NFS_MOUNT_NOACL) | |
481 | goto out_noacl; | |
482 | ||
483 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
484 | if (IS_ERR(server->client_acl)) | |
485 | goto out_noacl; | |
486 | ||
487 | /* No errors! Assume that Sun nfsacls are supported */ | |
488 | server->caps |= NFS_CAP_ACLS; | |
489 | return; | |
490 | ||
491 | out_noacl: | |
492 | server->caps &= ~NFS_CAP_ACLS; | |
493 | } | |
494 | #else | |
495 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
496 | { | |
497 | server->flags &= ~NFS_MOUNT_NOACL; | |
498 | server->caps &= ~NFS_CAP_ACLS; | |
499 | } | |
500 | #endif | |
501 | ||
502 | /* | |
503 | * Create a general RPC client | |
504 | */ | |
505 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
506 | { | |
507 | struct nfs_client *clp = server->nfs_client; | |
508 | ||
509 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
510 | if (IS_ERR(server->client)) { | |
511 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
512 | return PTR_ERR(server->client); | |
513 | } | |
514 | ||
515 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
516 | struct rpc_auth *auth; | |
517 | ||
518 | auth = rpcauth_create(pseudoflavour, server->client); | |
519 | if (IS_ERR(auth)) { | |
520 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
521 | return PTR_ERR(auth); | |
522 | } | |
523 | } | |
524 | server->client->cl_softrtry = 0; | |
525 | if (server->flags & NFS_MOUNT_SOFT) | |
526 | server->client->cl_softrtry = 1; | |
527 | ||
528 | server->client->cl_intr = 0; | |
529 | if (server->flags & NFS4_MOUNT_INTR) | |
530 | server->client->cl_intr = 1; | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Initialise an NFS2 or NFS3 client | |
537 | */ | |
538 | static int nfs_init_client(struct nfs_client *clp, const struct nfs_mount_data *data) | |
539 | { | |
540 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; | |
541 | int error; | |
542 | ||
543 | if (clp->cl_cons_state == NFS_CS_READY) { | |
544 | /* the client is already initialised */ | |
545 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | /* Check NFS protocol revision and initialize RPC op vector */ | |
550 | clp->rpc_ops = &nfs_v2_clientops; | |
551 | #ifdef CONFIG_NFS_V3 | |
552 | if (clp->cl_nfsversion == 3) | |
553 | clp->rpc_ops = &nfs_v3_clientops; | |
554 | #endif | |
555 | /* | |
556 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
557 | * - RFC 2623, sec 2.3.2 | |
558 | */ | |
559 | error = nfs_create_rpc_client(clp, proto, data->timeo, data->retrans, | |
560 | RPC_AUTH_UNIX); | |
561 | if (error < 0) | |
562 | goto error; | |
563 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
564 | return 0; | |
565 | ||
566 | error: | |
567 | nfs_mark_client_ready(clp, error); | |
568 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
569 | return error; | |
570 | } | |
571 | ||
572 | /* | |
573 | * Create a version 2 or 3 client | |
574 | */ | |
575 | static int nfs_init_server(struct nfs_server *server, const struct nfs_mount_data *data) | |
576 | { | |
577 | struct nfs_client *clp; | |
578 | int error, nfsvers = 2; | |
579 | ||
580 | dprintk("--> nfs_init_server()\n"); | |
581 | ||
582 | #ifdef CONFIG_NFS_V3 | |
583 | if (data->flags & NFS_MOUNT_VER3) | |
584 | nfsvers = 3; | |
585 | #endif | |
586 | ||
587 | /* Allocate or find a client reference we can use */ | |
588 | clp = nfs_get_client(data->hostname, &data->addr, nfsvers); | |
589 | if (IS_ERR(clp)) { | |
590 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
591 | return PTR_ERR(clp); | |
592 | } | |
593 | ||
594 | error = nfs_init_client(clp, data); | |
595 | if (error < 0) | |
596 | goto error; | |
597 | ||
598 | server->nfs_client = clp; | |
599 | ||
600 | /* Initialise the client representation from the mount data */ | |
601 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
602 | ||
603 | if (data->rsize) | |
604 | server->rsize = nfs_block_size(data->rsize, NULL); | |
605 | if (data->wsize) | |
606 | server->wsize = nfs_block_size(data->wsize, NULL); | |
607 | ||
608 | server->acregmin = data->acregmin * HZ; | |
609 | server->acregmax = data->acregmax * HZ; | |
610 | server->acdirmin = data->acdirmin * HZ; | |
611 | server->acdirmax = data->acdirmax * HZ; | |
612 | ||
613 | /* Start lockd here, before we might error out */ | |
614 | error = nfs_start_lockd(server); | |
615 | if (error < 0) | |
616 | goto error; | |
617 | ||
618 | error = nfs_init_server_rpcclient(server, data->pseudoflavor); | |
619 | if (error < 0) | |
620 | goto error; | |
621 | ||
622 | server->namelen = data->namlen; | |
623 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
624 | nfs_init_server_aclclient(server); | |
625 | if (clp->cl_nfsversion == 3) { | |
626 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
627 | server->namelen = NFS3_MAXNAMLEN; | |
628 | server->caps |= NFS_CAP_READDIRPLUS; | |
629 | } else { | |
630 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
631 | server->namelen = NFS2_MAXNAMLEN; | |
632 | } | |
633 | ||
634 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); | |
635 | return 0; | |
636 | ||
637 | error: | |
638 | server->nfs_client = NULL; | |
639 | nfs_put_client(clp); | |
640 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
641 | return error; | |
642 | } | |
643 | ||
644 | /* | |
645 | * Load up the server record from information gained in an fsinfo record | |
646 | */ | |
647 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
648 | { | |
649 | unsigned long max_rpc_payload; | |
650 | ||
651 | /* Work out a lot of parameters */ | |
652 | if (server->rsize == 0) | |
653 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
654 | if (server->wsize == 0) | |
655 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
656 | ||
657 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
658 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
659 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
660 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
661 | ||
662 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
663 | if (server->rsize > max_rpc_payload) | |
664 | server->rsize = max_rpc_payload; | |
665 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
666 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
667 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
668 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
669 | ||
670 | if (server->wsize > max_rpc_payload) | |
671 | server->wsize = max_rpc_payload; | |
672 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
673 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
674 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
675 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
676 | ||
677 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
678 | if (server->dtsize > PAGE_CACHE_SIZE) | |
679 | server->dtsize = PAGE_CACHE_SIZE; | |
680 | if (server->dtsize > server->rsize) | |
681 | server->dtsize = server->rsize; | |
682 | ||
683 | if (server->flags & NFS_MOUNT_NOAC) { | |
684 | server->acregmin = server->acregmax = 0; | |
685 | server->acdirmin = server->acdirmax = 0; | |
686 | } | |
687 | ||
688 | server->maxfilesize = fsinfo->maxfilesize; | |
689 | ||
690 | /* We're airborne Set socket buffersize */ | |
691 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
692 | } | |
693 | ||
694 | /* | |
695 | * Probe filesystem information, including the FSID on v2/v3 | |
696 | */ | |
697 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
698 | { | |
699 | struct nfs_fsinfo fsinfo; | |
700 | struct nfs_client *clp = server->nfs_client; | |
701 | int error; | |
702 | ||
703 | dprintk("--> nfs_probe_fsinfo()\n"); | |
704 | ||
705 | if (clp->rpc_ops->set_capabilities != NULL) { | |
706 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
707 | if (error < 0) | |
708 | goto out_error; | |
709 | } | |
710 | ||
711 | fsinfo.fattr = fattr; | |
712 | nfs_fattr_init(fattr); | |
713 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
714 | if (error < 0) | |
715 | goto out_error; | |
716 | ||
717 | nfs_server_set_fsinfo(server, &fsinfo); | |
718 | ||
719 | /* Get some general file system info */ | |
720 | if (server->namelen == 0) { | |
721 | struct nfs_pathconf pathinfo; | |
722 | ||
723 | pathinfo.fattr = fattr; | |
724 | nfs_fattr_init(fattr); | |
725 | ||
726 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
727 | server->namelen = pathinfo.max_namelen; | |
728 | } | |
729 | ||
730 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
731 | return 0; | |
732 | ||
733 | out_error: | |
734 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
735 | return error; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Copy useful information when duplicating a server record | |
740 | */ | |
741 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
742 | { | |
743 | target->flags = source->flags; | |
744 | target->acregmin = source->acregmin; | |
745 | target->acregmax = source->acregmax; | |
746 | target->acdirmin = source->acdirmin; | |
747 | target->acdirmax = source->acdirmax; | |
748 | target->caps = source->caps; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Allocate and initialise a server record | |
753 | */ | |
754 | static struct nfs_server *nfs_alloc_server(void) | |
755 | { | |
756 | struct nfs_server *server; | |
757 | ||
758 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
759 | if (!server) | |
760 | return NULL; | |
761 | ||
762 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
763 | ||
764 | /* Zero out the NFS state stuff */ | |
765 | INIT_LIST_HEAD(&server->client_link); | |
766 | INIT_LIST_HEAD(&server->master_link); | |
767 | ||
768 | server->io_stats = nfs_alloc_iostats(); | |
769 | if (!server->io_stats) { | |
770 | kfree(server); | |
771 | return NULL; | |
772 | } | |
773 | ||
774 | return server; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Free up a server record | |
779 | */ | |
780 | void nfs_free_server(struct nfs_server *server) | |
781 | { | |
782 | dprintk("--> nfs_free_server()\n"); | |
783 | ||
784 | spin_lock(&nfs_client_lock); | |
785 | list_del(&server->client_link); | |
786 | list_del(&server->master_link); | |
787 | spin_unlock(&nfs_client_lock); | |
788 | ||
789 | if (server->destroy != NULL) | |
790 | server->destroy(server); | |
791 | if (!IS_ERR(server->client)) | |
792 | rpc_shutdown_client(server->client); | |
793 | ||
794 | nfs_put_client(server->nfs_client); | |
795 | ||
796 | nfs_free_iostats(server->io_stats); | |
797 | kfree(server); | |
798 | nfs_release_automount_timer(); | |
799 | dprintk("<-- nfs_free_server()\n"); | |
800 | } | |
801 | ||
802 | /* | |
803 | * Create a version 2 or 3 volume record | |
804 | * - keyed on server and FSID | |
805 | */ | |
806 | struct nfs_server *nfs_create_server(const struct nfs_mount_data *data, | |
807 | struct nfs_fh *mntfh) | |
808 | { | |
809 | struct nfs_server *server; | |
810 | struct nfs_fattr fattr; | |
811 | int error; | |
812 | ||
813 | server = nfs_alloc_server(); | |
814 | if (!server) | |
815 | return ERR_PTR(-ENOMEM); | |
816 | ||
817 | /* Get a client representation */ | |
818 | error = nfs_init_server(server, data); | |
819 | if (error < 0) | |
820 | goto error; | |
821 | ||
822 | BUG_ON(!server->nfs_client); | |
823 | BUG_ON(!server->nfs_client->rpc_ops); | |
824 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
825 | ||
826 | /* Probe the root fh to retrieve its FSID */ | |
827 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
828 | if (error < 0) | |
829 | goto error; | |
830 | if (!(fattr.valid & NFS_ATTR_FATTR)) { | |
831 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
832 | if (error < 0) { | |
833 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
834 | goto error; | |
835 | } | |
836 | } | |
837 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
838 | ||
6daabf1b DH |
839 | dprintk("Server FSID: %llx:%llx\n", |
840 | (unsigned long long) server->fsid.major, | |
841 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
842 | |
843 | BUG_ON(!server->nfs_client); | |
844 | BUG_ON(!server->nfs_client->rpc_ops); | |
845 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
846 | ||
847 | spin_lock(&nfs_client_lock); | |
848 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
849 | list_add_tail(&server->master_link, &nfs_volume_list); | |
850 | spin_unlock(&nfs_client_lock); | |
851 | ||
852 | server->mount_time = jiffies; | |
853 | return server; | |
854 | ||
855 | error: | |
856 | nfs_free_server(server); | |
857 | return ERR_PTR(error); | |
858 | } | |
859 | ||
860 | #ifdef CONFIG_NFS_V4 | |
861 | /* | |
862 | * Initialise an NFS4 client record | |
863 | */ | |
864 | static int nfs4_init_client(struct nfs_client *clp, | |
865 | int proto, int timeo, int retrans, | |
866 | rpc_authflavor_t authflavour) | |
867 | { | |
868 | int error; | |
869 | ||
870 | if (clp->cl_cons_state == NFS_CS_READY) { | |
871 | /* the client is initialised already */ | |
872 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
873 | return 0; | |
874 | } | |
875 | ||
876 | /* Check NFS protocol revision and initialize RPC op vector */ | |
877 | clp->rpc_ops = &nfs_v4_clientops; | |
878 | ||
879 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour); | |
880 | if (error < 0) | |
881 | goto error; | |
882 | ||
883 | error = nfs_idmap_new(clp); | |
884 | if (error < 0) { | |
885 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
886 | __FUNCTION__, error); | |
54ceac45 DH |
887 | goto error; |
888 | } | |
9c5bf38d | 889 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
890 | |
891 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
892 | return 0; | |
893 | ||
894 | error: | |
895 | nfs_mark_client_ready(clp, error); | |
896 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
897 | return error; | |
898 | } | |
899 | ||
900 | /* | |
901 | * Set up an NFS4 client | |
902 | */ | |
903 | static int nfs4_set_client(struct nfs_server *server, | |
904 | const char *hostname, const struct sockaddr_in *addr, | |
905 | rpc_authflavor_t authflavour, | |
906 | int proto, int timeo, int retrans) | |
907 | { | |
908 | struct nfs_client *clp; | |
909 | int error; | |
910 | ||
911 | dprintk("--> nfs4_set_client()\n"); | |
912 | ||
913 | /* Allocate or find a client reference we can use */ | |
914 | clp = nfs_get_client(hostname, addr, 4); | |
915 | if (IS_ERR(clp)) { | |
916 | error = PTR_ERR(clp); | |
917 | goto error; | |
918 | } | |
919 | error = nfs4_init_client(clp, proto, timeo, retrans, authflavour); | |
920 | if (error < 0) | |
921 | goto error_put; | |
922 | ||
923 | server->nfs_client = clp; | |
924 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
925 | return 0; | |
926 | ||
927 | error_put: | |
928 | nfs_put_client(clp); | |
929 | error: | |
930 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
931 | return error; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Create a version 4 volume record | |
936 | */ | |
937 | static int nfs4_init_server(struct nfs_server *server, | |
938 | const struct nfs4_mount_data *data, rpc_authflavor_t authflavour) | |
939 | { | |
940 | int error; | |
941 | ||
942 | dprintk("--> nfs4_init_server()\n"); | |
943 | ||
944 | /* Initialise the client representation from the mount data */ | |
945 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
946 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
947 | ||
948 | if (data->rsize) | |
949 | server->rsize = nfs_block_size(data->rsize, NULL); | |
950 | if (data->wsize) | |
951 | server->wsize = nfs_block_size(data->wsize, NULL); | |
952 | ||
953 | server->acregmin = data->acregmin * HZ; | |
954 | server->acregmax = data->acregmax * HZ; | |
955 | server->acdirmin = data->acdirmin * HZ; | |
956 | server->acdirmax = data->acdirmax * HZ; | |
957 | ||
958 | error = nfs_init_server_rpcclient(server, authflavour); | |
959 | ||
960 | /* Done */ | |
961 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
962 | return error; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Create a version 4 volume record | |
967 | * - keyed on server and FSID | |
968 | */ | |
969 | struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data, | |
970 | const char *hostname, | |
971 | const struct sockaddr_in *addr, | |
972 | const char *mntpath, | |
973 | const char *ip_addr, | |
974 | rpc_authflavor_t authflavour, | |
975 | struct nfs_fh *mntfh) | |
976 | { | |
977 | struct nfs_fattr fattr; | |
978 | struct nfs_server *server; | |
979 | int error; | |
980 | ||
981 | dprintk("--> nfs4_create_server()\n"); | |
982 | ||
983 | server = nfs_alloc_server(); | |
984 | if (!server) | |
985 | return ERR_PTR(-ENOMEM); | |
986 | ||
987 | /* Get a client record */ | |
988 | error = nfs4_set_client(server, hostname, addr, authflavour, | |
989 | data->proto, data->timeo, data->retrans); | |
990 | if (error < 0) | |
991 | goto error; | |
992 | ||
993 | /* set up the general RPC client */ | |
994 | error = nfs4_init_server(server, data, authflavour); | |
995 | if (error < 0) | |
996 | goto error; | |
997 | ||
998 | BUG_ON(!server->nfs_client); | |
999 | BUG_ON(!server->nfs_client->rpc_ops); | |
1000 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1001 | ||
1002 | /* Probe the root fh to retrieve its FSID */ | |
1003 | error = nfs4_path_walk(server, mntfh, mntpath); | |
1004 | if (error < 0) | |
1005 | goto error; | |
1006 | ||
6daabf1b DH |
1007 | dprintk("Server FSID: %llx:%llx\n", |
1008 | (unsigned long long) server->fsid.major, | |
1009 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1010 | dprintk("Mount FH: %d\n", mntfh->size); |
1011 | ||
1012 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1013 | if (error < 0) | |
1014 | goto error; | |
1015 | ||
1016 | BUG_ON(!server->nfs_client); | |
1017 | BUG_ON(!server->nfs_client->rpc_ops); | |
1018 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1019 | ||
1020 | spin_lock(&nfs_client_lock); | |
1021 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1022 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1023 | spin_unlock(&nfs_client_lock); | |
1024 | ||
1025 | server->mount_time = jiffies; | |
1026 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1027 | return server; | |
1028 | ||
1029 | error: | |
1030 | nfs_free_server(server); | |
1031 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1032 | return ERR_PTR(error); | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Create an NFS4 referral server record | |
1037 | */ | |
1038 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1039 | struct nfs_fh *fh) | |
1040 | { | |
1041 | struct nfs_client *parent_client; | |
1042 | struct nfs_server *server, *parent_server; | |
1043 | struct nfs_fattr fattr; | |
1044 | int error; | |
1045 | ||
1046 | dprintk("--> nfs4_create_referral_server()\n"); | |
1047 | ||
1048 | server = nfs_alloc_server(); | |
1049 | if (!server) | |
1050 | return ERR_PTR(-ENOMEM); | |
1051 | ||
1052 | parent_server = NFS_SB(data->sb); | |
1053 | parent_client = parent_server->nfs_client; | |
1054 | ||
1055 | /* Get a client representation. | |
1056 | * Note: NFSv4 always uses TCP, */ | |
1057 | error = nfs4_set_client(server, data->hostname, data->addr, | |
1058 | data->authflavor, | |
1059 | parent_server->client->cl_xprt->prot, | |
1060 | parent_client->retrans_timeo, | |
1061 | parent_client->retrans_count); | |
297de4f6 | 1062 | if (error < 0) |
1063 | goto error; | |
54ceac45 DH |
1064 | |
1065 | /* Initialise the client representation from the parent server */ | |
1066 | nfs_server_copy_userdata(server, parent_server); | |
1067 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1068 | ||
1069 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1070 | if (error < 0) | |
1071 | goto error; | |
1072 | ||
1073 | BUG_ON(!server->nfs_client); | |
1074 | BUG_ON(!server->nfs_client->rpc_ops); | |
1075 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1076 | ||
1077 | /* probe the filesystem info for this server filesystem */ | |
1078 | error = nfs_probe_fsinfo(server, fh, &fattr); | |
1079 | if (error < 0) | |
1080 | goto error; | |
1081 | ||
1082 | dprintk("Referral FSID: %llx:%llx\n", | |
6daabf1b DH |
1083 | (unsigned long long) server->fsid.major, |
1084 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1085 | |
1086 | spin_lock(&nfs_client_lock); | |
1087 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1088 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1089 | spin_unlock(&nfs_client_lock); | |
1090 | ||
1091 | server->mount_time = jiffies; | |
1092 | ||
1093 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1094 | return server; | |
1095 | ||
1096 | error: | |
1097 | nfs_free_server(server); | |
1098 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1099 | return ERR_PTR(error); | |
1100 | } | |
1101 | ||
1102 | #endif /* CONFIG_NFS_V4 */ | |
1103 | ||
1104 | /* | |
1105 | * Clone an NFS2, NFS3 or NFS4 server record | |
1106 | */ | |
1107 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1108 | struct nfs_fh *fh, | |
1109 | struct nfs_fattr *fattr) | |
1110 | { | |
1111 | struct nfs_server *server; | |
1112 | struct nfs_fattr fattr_fsinfo; | |
1113 | int error; | |
1114 | ||
1115 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1116 | (unsigned long long) fattr->fsid.major, |
1117 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1118 | |
1119 | server = nfs_alloc_server(); | |
1120 | if (!server) | |
1121 | return ERR_PTR(-ENOMEM); | |
1122 | ||
1123 | /* Copy data from the source */ | |
1124 | server->nfs_client = source->nfs_client; | |
1125 | atomic_inc(&server->nfs_client->cl_count); | |
1126 | nfs_server_copy_userdata(server, source); | |
1127 | ||
1128 | server->fsid = fattr->fsid; | |
1129 | ||
1130 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1131 | if (error < 0) | |
1132 | goto out_free_server; | |
1133 | if (!IS_ERR(source->client_acl)) | |
1134 | nfs_init_server_aclclient(server); | |
1135 | ||
1136 | /* probe the filesystem info for this server filesystem */ | |
1137 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1138 | if (error < 0) | |
1139 | goto out_free_server; | |
1140 | ||
1141 | dprintk("Cloned FSID: %llx:%llx\n", | |
6daabf1b DH |
1142 | (unsigned long long) server->fsid.major, |
1143 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1144 | |
1145 | error = nfs_start_lockd(server); | |
1146 | if (error < 0) | |
1147 | goto out_free_server; | |
1148 | ||
1149 | spin_lock(&nfs_client_lock); | |
1150 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1151 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1152 | spin_unlock(&nfs_client_lock); | |
1153 | ||
1154 | server->mount_time = jiffies; | |
1155 | ||
1156 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1157 | return server; | |
1158 | ||
1159 | out_free_server: | |
1160 | nfs_free_server(server); | |
1161 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1162 | return ERR_PTR(error); | |
1163 | } | |
6aaca566 DH |
1164 | |
1165 | #ifdef CONFIG_PROC_FS | |
1166 | static struct proc_dir_entry *proc_fs_nfs; | |
1167 | ||
1168 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1169 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1170 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1171 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1172 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1173 | ||
1174 | static struct seq_operations nfs_server_list_ops = { | |
1175 | .start = nfs_server_list_start, | |
1176 | .next = nfs_server_list_next, | |
1177 | .stop = nfs_server_list_stop, | |
1178 | .show = nfs_server_list_show, | |
1179 | }; | |
1180 | ||
1181 | static struct file_operations nfs_server_list_fops = { | |
1182 | .open = nfs_server_list_open, | |
1183 | .read = seq_read, | |
1184 | .llseek = seq_lseek, | |
1185 | .release = seq_release, | |
1186 | }; | |
1187 | ||
1188 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1189 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1190 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1191 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1192 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1193 | ||
1194 | static struct seq_operations nfs_volume_list_ops = { | |
1195 | .start = nfs_volume_list_start, | |
1196 | .next = nfs_volume_list_next, | |
1197 | .stop = nfs_volume_list_stop, | |
1198 | .show = nfs_volume_list_show, | |
1199 | }; | |
1200 | ||
1201 | static struct file_operations nfs_volume_list_fops = { | |
1202 | .open = nfs_volume_list_open, | |
1203 | .read = seq_read, | |
1204 | .llseek = seq_lseek, | |
1205 | .release = seq_release, | |
1206 | }; | |
1207 | ||
1208 | /* | |
1209 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1210 | * we're dealing | |
1211 | */ | |
1212 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1213 | { | |
1214 | struct seq_file *m; | |
1215 | int ret; | |
1216 | ||
1217 | ret = seq_open(file, &nfs_server_list_ops); | |
1218 | if (ret < 0) | |
1219 | return ret; | |
1220 | ||
1221 | m = file->private_data; | |
1222 | m->private = PDE(inode)->data; | |
1223 | ||
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | /* | |
1228 | * set up the iterator to start reading from the server list and return the first item | |
1229 | */ | |
1230 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1231 | { | |
1232 | struct list_head *_p; | |
1233 | loff_t pos = *_pos; | |
1234 | ||
1235 | /* lock the list against modification */ | |
1236 | spin_lock(&nfs_client_lock); | |
1237 | ||
1238 | /* allow for the header line */ | |
1239 | if (!pos) | |
1240 | return SEQ_START_TOKEN; | |
1241 | pos--; | |
1242 | ||
1243 | /* find the n'th element in the list */ | |
1244 | list_for_each(_p, &nfs_client_list) | |
1245 | if (!pos--) | |
1246 | break; | |
1247 | ||
1248 | return _p != &nfs_client_list ? _p : NULL; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * move to next server | |
1253 | */ | |
1254 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1255 | { | |
1256 | struct list_head *_p; | |
1257 | ||
1258 | (*pos)++; | |
1259 | ||
1260 | _p = v; | |
1261 | _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next; | |
1262 | ||
1263 | return _p != &nfs_client_list ? _p : NULL; | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * clean up after reading from the transports list | |
1268 | */ | |
1269 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1270 | { | |
1271 | spin_unlock(&nfs_client_lock); | |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * display a header line followed by a load of call lines | |
1276 | */ | |
1277 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1278 | { | |
1279 | struct nfs_client *clp; | |
1280 | ||
1281 | /* display header on line 1 */ | |
1282 | if (v == SEQ_START_TOKEN) { | |
1283 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | /* display one transport per line on subsequent lines */ | |
1288 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1289 | ||
1290 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1291 | clp->cl_nfsversion, | |
1292 | NIPQUAD(clp->cl_addr.sin_addr), | |
1293 | ntohs(clp->cl_addr.sin_port), | |
1294 | atomic_read(&clp->cl_count), | |
1295 | clp->cl_hostname); | |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1302 | */ | |
1303 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1304 | { | |
1305 | struct seq_file *m; | |
1306 | int ret; | |
1307 | ||
1308 | ret = seq_open(file, &nfs_volume_list_ops); | |
1309 | if (ret < 0) | |
1310 | return ret; | |
1311 | ||
1312 | m = file->private_data; | |
1313 | m->private = PDE(inode)->data; | |
1314 | ||
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * set up the iterator to start reading from the volume list and return the first item | |
1320 | */ | |
1321 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1322 | { | |
1323 | struct list_head *_p; | |
1324 | loff_t pos = *_pos; | |
1325 | ||
1326 | /* lock the list against modification */ | |
1327 | spin_lock(&nfs_client_lock); | |
1328 | ||
1329 | /* allow for the header line */ | |
1330 | if (!pos) | |
1331 | return SEQ_START_TOKEN; | |
1332 | pos--; | |
1333 | ||
1334 | /* find the n'th element in the list */ | |
1335 | list_for_each(_p, &nfs_volume_list) | |
1336 | if (!pos--) | |
1337 | break; | |
1338 | ||
1339 | return _p != &nfs_volume_list ? _p : NULL; | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * move to next volume | |
1344 | */ | |
1345 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1346 | { | |
1347 | struct list_head *_p; | |
1348 | ||
1349 | (*pos)++; | |
1350 | ||
1351 | _p = v; | |
1352 | _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next; | |
1353 | ||
1354 | return _p != &nfs_volume_list ? _p : NULL; | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * clean up after reading from the transports list | |
1359 | */ | |
1360 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1361 | { | |
1362 | spin_unlock(&nfs_client_lock); | |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * display a header line followed by a load of call lines | |
1367 | */ | |
1368 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1369 | { | |
1370 | struct nfs_server *server; | |
1371 | struct nfs_client *clp; | |
1372 | char dev[8], fsid[17]; | |
1373 | ||
1374 | /* display header on line 1 */ | |
1375 | if (v == SEQ_START_TOKEN) { | |
1376 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); | |
1377 | return 0; | |
1378 | } | |
1379 | /* display one transport per line on subsequent lines */ | |
1380 | server = list_entry(v, struct nfs_server, master_link); | |
1381 | clp = server->nfs_client; | |
1382 | ||
1383 | snprintf(dev, 8, "%u:%u", | |
1384 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1385 | ||
1386 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1387 | (unsigned long long) server->fsid.major, |
1388 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1389 | |
1390 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1391 | clp->cl_nfsversion, | |
1392 | NIPQUAD(clp->cl_addr.sin_addr), | |
1393 | ntohs(clp->cl_addr.sin_port), | |
1394 | dev, | |
1395 | fsid); | |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * initialise the /proc/fs/nfsfs/ directory | |
1402 | */ | |
1403 | int __init nfs_fs_proc_init(void) | |
1404 | { | |
1405 | struct proc_dir_entry *p; | |
1406 | ||
1407 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1408 | if (!proc_fs_nfs) | |
1409 | goto error_0; | |
1410 | ||
1411 | proc_fs_nfs->owner = THIS_MODULE; | |
1412 | ||
1413 | /* a file of servers with which we're dealing */ | |
1414 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1415 | if (!p) | |
1416 | goto error_1; | |
1417 | ||
1418 | p->proc_fops = &nfs_server_list_fops; | |
1419 | p->owner = THIS_MODULE; | |
1420 | ||
1421 | /* a file of volumes that we have mounted */ | |
1422 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1423 | if (!p) | |
1424 | goto error_2; | |
1425 | ||
1426 | p->proc_fops = &nfs_volume_list_fops; | |
1427 | p->owner = THIS_MODULE; | |
1428 | return 0; | |
1429 | ||
1430 | error_2: | |
1431 | remove_proc_entry("servers", proc_fs_nfs); | |
1432 | error_1: | |
1433 | remove_proc_entry("nfsfs", proc_root_fs); | |
1434 | error_0: | |
1435 | return -ENOMEM; | |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * clean up the /proc/fs/nfsfs/ directory | |
1440 | */ | |
1441 | void nfs_fs_proc_exit(void) | |
1442 | { | |
1443 | remove_proc_entry("volumes", proc_fs_nfs); | |
1444 | remove_proc_entry("servers", proc_fs_nfs); | |
1445 | remove_proc_entry("nfsfs", proc_root_fs); | |
1446 | } | |
1447 | ||
1448 | #endif /* CONFIG_PROC_FS */ |