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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 | ||
83250493 | 325 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
326 | clp->cl_cons_state != NFS_CS_INITING); |
327 | if (error < 0) { | |
328 | nfs_put_client(clp); | |
329 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
330 | } |
331 | ||
332 | if (clp->cl_cons_state < NFS_CS_READY) { | |
333 | error = clp->cl_cons_state; | |
334 | nfs_put_client(clp); | |
335 | return ERR_PTR(error); | |
336 | } | |
337 | ||
54ceac45 DH |
338 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
339 | ||
24c8dbbb DH |
340 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
341 | return clp; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Mark a server as ready or failed | |
346 | */ | |
54ceac45 | 347 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
348 | { |
349 | clp->cl_cons_state = state; | |
350 | wake_up_all(&nfs_client_active_wq); | |
351 | } | |
5006a76c DH |
352 | |
353 | /* | |
354 | * Initialise the timeout values for a connection | |
355 | */ | |
356 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
357 | unsigned int timeo, unsigned int retrans) | |
358 | { | |
359 | to->to_initval = timeo * HZ / 10; | |
360 | to->to_retries = retrans; | |
361 | if (!to->to_retries) | |
362 | to->to_retries = 2; | |
363 | ||
364 | switch (proto) { | |
365 | case IPPROTO_TCP: | |
366 | if (!to->to_initval) | |
367 | to->to_initval = 60 * HZ; | |
368 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
369 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
370 | to->to_increment = to->to_initval; | |
371 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
372 | to->to_exponential = 0; | |
373 | break; | |
374 | case IPPROTO_UDP: | |
375 | default: | |
376 | if (!to->to_initval) | |
377 | to->to_initval = 11 * HZ / 10; | |
378 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
379 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
380 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
381 | to->to_exponential = 1; | |
382 | break; | |
383 | } | |
384 | } | |
385 | ||
386 | /* | |
387 | * Create an RPC client handle | |
388 | */ | |
54ceac45 DH |
389 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
390 | unsigned int timeo, | |
391 | unsigned int retrans, | |
392 | rpc_authflavor_t flavor) | |
5006a76c DH |
393 | { |
394 | struct rpc_timeout timeparms; | |
5006a76c | 395 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
396 | struct rpc_create_args args = { |
397 | .protocol = proto, | |
398 | .address = (struct sockaddr *)&clp->cl_addr, | |
399 | .addrsize = sizeof(clp->cl_addr), | |
400 | .timeout = &timeparms, | |
401 | .servername = clp->cl_hostname, | |
402 | .program = &nfs_program, | |
403 | .version = clp->rpc_ops->version, | |
404 | .authflavor = flavor, | |
405 | }; | |
5006a76c DH |
406 | |
407 | if (!IS_ERR(clp->cl_rpcclient)) | |
408 | return 0; | |
409 | ||
410 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
411 | clp->retrans_timeo = timeparms.to_initval; | |
412 | clp->retrans_count = timeparms.to_retries; | |
413 | ||
41877d20 | 414 | clnt = rpc_create(&args); |
5006a76c DH |
415 | if (IS_ERR(clnt)) { |
416 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
417 | __FUNCTION__, PTR_ERR(clnt)); | |
418 | return PTR_ERR(clnt); | |
419 | } | |
420 | ||
5006a76c DH |
421 | clp->cl_rpcclient = clnt; |
422 | return 0; | |
423 | } | |
54ceac45 DH |
424 | |
425 | /* | |
426 | * Version 2 or 3 client destruction | |
427 | */ | |
428 | static void nfs_destroy_server(struct nfs_server *server) | |
429 | { | |
430 | if (!IS_ERR(server->client_acl)) | |
431 | rpc_shutdown_client(server->client_acl); | |
432 | ||
433 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
434 | lockd_down(); /* release rpc.lockd */ | |
435 | } | |
436 | ||
437 | /* | |
438 | * Version 2 or 3 lockd setup | |
439 | */ | |
440 | static int nfs_start_lockd(struct nfs_server *server) | |
441 | { | |
442 | int error = 0; | |
443 | ||
444 | if (server->nfs_client->cl_nfsversion > 3) | |
445 | goto out; | |
446 | if (server->flags & NFS_MOUNT_NONLM) | |
447 | goto out; | |
24e36663 N |
448 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
449 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
450 | if (error < 0) |
451 | server->flags |= NFS_MOUNT_NONLM; | |
452 | else | |
453 | server->destroy = nfs_destroy_server; | |
454 | out: | |
455 | return error; | |
456 | } | |
457 | ||
458 | /* | |
459 | * Initialise an NFSv3 ACL client connection | |
460 | */ | |
461 | #ifdef CONFIG_NFS_V3_ACL | |
462 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
463 | { | |
464 | if (server->nfs_client->cl_nfsversion != 3) | |
465 | goto out_noacl; | |
466 | if (server->flags & NFS_MOUNT_NOACL) | |
467 | goto out_noacl; | |
468 | ||
469 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
470 | if (IS_ERR(server->client_acl)) | |
471 | goto out_noacl; | |
472 | ||
473 | /* No errors! Assume that Sun nfsacls are supported */ | |
474 | server->caps |= NFS_CAP_ACLS; | |
475 | return; | |
476 | ||
477 | out_noacl: | |
478 | server->caps &= ~NFS_CAP_ACLS; | |
479 | } | |
480 | #else | |
481 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
482 | { | |
483 | server->flags &= ~NFS_MOUNT_NOACL; | |
484 | server->caps &= ~NFS_CAP_ACLS; | |
485 | } | |
486 | #endif | |
487 | ||
488 | /* | |
489 | * Create a general RPC client | |
490 | */ | |
491 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
492 | { | |
493 | struct nfs_client *clp = server->nfs_client; | |
494 | ||
495 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
496 | if (IS_ERR(server->client)) { | |
497 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
498 | return PTR_ERR(server->client); | |
499 | } | |
500 | ||
501 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
502 | struct rpc_auth *auth; | |
503 | ||
504 | auth = rpcauth_create(pseudoflavour, server->client); | |
505 | if (IS_ERR(auth)) { | |
506 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
507 | return PTR_ERR(auth); | |
508 | } | |
509 | } | |
510 | server->client->cl_softrtry = 0; | |
511 | if (server->flags & NFS_MOUNT_SOFT) | |
512 | server->client->cl_softrtry = 1; | |
513 | ||
514 | server->client->cl_intr = 0; | |
515 | if (server->flags & NFS4_MOUNT_INTR) | |
516 | server->client->cl_intr = 1; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Initialise an NFS2 or NFS3 client | |
523 | */ | |
524 | static int nfs_init_client(struct nfs_client *clp, const struct nfs_mount_data *data) | |
525 | { | |
526 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; | |
527 | int error; | |
528 | ||
529 | if (clp->cl_cons_state == NFS_CS_READY) { | |
530 | /* the client is already initialised */ | |
531 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
532 | return 0; | |
533 | } | |
534 | ||
535 | /* Check NFS protocol revision and initialize RPC op vector */ | |
536 | clp->rpc_ops = &nfs_v2_clientops; | |
537 | #ifdef CONFIG_NFS_V3 | |
538 | if (clp->cl_nfsversion == 3) | |
539 | clp->rpc_ops = &nfs_v3_clientops; | |
540 | #endif | |
541 | /* | |
542 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
543 | * - RFC 2623, sec 2.3.2 | |
544 | */ | |
545 | error = nfs_create_rpc_client(clp, proto, data->timeo, data->retrans, | |
546 | RPC_AUTH_UNIX); | |
547 | if (error < 0) | |
548 | goto error; | |
549 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
550 | return 0; | |
551 | ||
552 | error: | |
553 | nfs_mark_client_ready(clp, error); | |
554 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
555 | return error; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Create a version 2 or 3 client | |
560 | */ | |
561 | static int nfs_init_server(struct nfs_server *server, const struct nfs_mount_data *data) | |
562 | { | |
563 | struct nfs_client *clp; | |
564 | int error, nfsvers = 2; | |
565 | ||
566 | dprintk("--> nfs_init_server()\n"); | |
567 | ||
568 | #ifdef CONFIG_NFS_V3 | |
569 | if (data->flags & NFS_MOUNT_VER3) | |
570 | nfsvers = 3; | |
571 | #endif | |
572 | ||
573 | /* Allocate or find a client reference we can use */ | |
574 | clp = nfs_get_client(data->hostname, &data->addr, nfsvers); | |
575 | if (IS_ERR(clp)) { | |
576 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
577 | return PTR_ERR(clp); | |
578 | } | |
579 | ||
580 | error = nfs_init_client(clp, data); | |
581 | if (error < 0) | |
582 | goto error; | |
583 | ||
584 | server->nfs_client = clp; | |
585 | ||
586 | /* Initialise the client representation from the mount data */ | |
587 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
588 | ||
589 | if (data->rsize) | |
590 | server->rsize = nfs_block_size(data->rsize, NULL); | |
591 | if (data->wsize) | |
592 | server->wsize = nfs_block_size(data->wsize, NULL); | |
593 | ||
594 | server->acregmin = data->acregmin * HZ; | |
595 | server->acregmax = data->acregmax * HZ; | |
596 | server->acdirmin = data->acdirmin * HZ; | |
597 | server->acdirmax = data->acdirmax * HZ; | |
598 | ||
599 | /* Start lockd here, before we might error out */ | |
600 | error = nfs_start_lockd(server); | |
601 | if (error < 0) | |
602 | goto error; | |
603 | ||
604 | error = nfs_init_server_rpcclient(server, data->pseudoflavor); | |
605 | if (error < 0) | |
606 | goto error; | |
607 | ||
608 | server->namelen = data->namlen; | |
609 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
610 | nfs_init_server_aclclient(server); | |
611 | if (clp->cl_nfsversion == 3) { | |
612 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
613 | server->namelen = NFS3_MAXNAMLEN; | |
614 | server->caps |= NFS_CAP_READDIRPLUS; | |
615 | } else { | |
616 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
617 | server->namelen = NFS2_MAXNAMLEN; | |
618 | } | |
619 | ||
620 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); | |
621 | return 0; | |
622 | ||
623 | error: | |
624 | server->nfs_client = NULL; | |
625 | nfs_put_client(clp); | |
626 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
627 | return error; | |
628 | } | |
629 | ||
630 | /* | |
631 | * Load up the server record from information gained in an fsinfo record | |
632 | */ | |
633 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
634 | { | |
635 | unsigned long max_rpc_payload; | |
636 | ||
637 | /* Work out a lot of parameters */ | |
638 | if (server->rsize == 0) | |
639 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
640 | if (server->wsize == 0) | |
641 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
642 | ||
643 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
644 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
645 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
646 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
647 | ||
648 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
649 | if (server->rsize > max_rpc_payload) | |
650 | server->rsize = max_rpc_payload; | |
651 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
652 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
653 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
654 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
655 | ||
656 | if (server->wsize > max_rpc_payload) | |
657 | server->wsize = max_rpc_payload; | |
658 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
659 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
660 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
661 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
662 | ||
663 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
664 | if (server->dtsize > PAGE_CACHE_SIZE) | |
665 | server->dtsize = PAGE_CACHE_SIZE; | |
666 | if (server->dtsize > server->rsize) | |
667 | server->dtsize = server->rsize; | |
668 | ||
669 | if (server->flags & NFS_MOUNT_NOAC) { | |
670 | server->acregmin = server->acregmax = 0; | |
671 | server->acdirmin = server->acdirmax = 0; | |
672 | } | |
673 | ||
674 | server->maxfilesize = fsinfo->maxfilesize; | |
675 | ||
676 | /* We're airborne Set socket buffersize */ | |
677 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
678 | } | |
679 | ||
680 | /* | |
681 | * Probe filesystem information, including the FSID on v2/v3 | |
682 | */ | |
683 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
684 | { | |
685 | struct nfs_fsinfo fsinfo; | |
686 | struct nfs_client *clp = server->nfs_client; | |
687 | int error; | |
688 | ||
689 | dprintk("--> nfs_probe_fsinfo()\n"); | |
690 | ||
691 | if (clp->rpc_ops->set_capabilities != NULL) { | |
692 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
693 | if (error < 0) | |
694 | goto out_error; | |
695 | } | |
696 | ||
697 | fsinfo.fattr = fattr; | |
698 | nfs_fattr_init(fattr); | |
699 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
700 | if (error < 0) | |
701 | goto out_error; | |
702 | ||
703 | nfs_server_set_fsinfo(server, &fsinfo); | |
704 | ||
705 | /* Get some general file system info */ | |
706 | if (server->namelen == 0) { | |
707 | struct nfs_pathconf pathinfo; | |
708 | ||
709 | pathinfo.fattr = fattr; | |
710 | nfs_fattr_init(fattr); | |
711 | ||
712 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
713 | server->namelen = pathinfo.max_namelen; | |
714 | } | |
715 | ||
716 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
717 | return 0; | |
718 | ||
719 | out_error: | |
720 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
721 | return error; | |
722 | } | |
723 | ||
724 | /* | |
725 | * Copy useful information when duplicating a server record | |
726 | */ | |
727 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
728 | { | |
729 | target->flags = source->flags; | |
730 | target->acregmin = source->acregmin; | |
731 | target->acregmax = source->acregmax; | |
732 | target->acdirmin = source->acdirmin; | |
733 | target->acdirmax = source->acdirmax; | |
734 | target->caps = source->caps; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Allocate and initialise a server record | |
739 | */ | |
740 | static struct nfs_server *nfs_alloc_server(void) | |
741 | { | |
742 | struct nfs_server *server; | |
743 | ||
744 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
745 | if (!server) | |
746 | return NULL; | |
747 | ||
748 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
749 | ||
750 | /* Zero out the NFS state stuff */ | |
751 | INIT_LIST_HEAD(&server->client_link); | |
752 | INIT_LIST_HEAD(&server->master_link); | |
753 | ||
754 | server->io_stats = nfs_alloc_iostats(); | |
755 | if (!server->io_stats) { | |
756 | kfree(server); | |
757 | return NULL; | |
758 | } | |
759 | ||
760 | return server; | |
761 | } | |
762 | ||
763 | /* | |
764 | * Free up a server record | |
765 | */ | |
766 | void nfs_free_server(struct nfs_server *server) | |
767 | { | |
768 | dprintk("--> nfs_free_server()\n"); | |
769 | ||
770 | spin_lock(&nfs_client_lock); | |
771 | list_del(&server->client_link); | |
772 | list_del(&server->master_link); | |
773 | spin_unlock(&nfs_client_lock); | |
774 | ||
775 | if (server->destroy != NULL) | |
776 | server->destroy(server); | |
777 | if (!IS_ERR(server->client)) | |
778 | rpc_shutdown_client(server->client); | |
779 | ||
780 | nfs_put_client(server->nfs_client); | |
781 | ||
782 | nfs_free_iostats(server->io_stats); | |
783 | kfree(server); | |
784 | nfs_release_automount_timer(); | |
785 | dprintk("<-- nfs_free_server()\n"); | |
786 | } | |
787 | ||
788 | /* | |
789 | * Create a version 2 or 3 volume record | |
790 | * - keyed on server and FSID | |
791 | */ | |
792 | struct nfs_server *nfs_create_server(const struct nfs_mount_data *data, | |
793 | struct nfs_fh *mntfh) | |
794 | { | |
795 | struct nfs_server *server; | |
796 | struct nfs_fattr fattr; | |
797 | int error; | |
798 | ||
799 | server = nfs_alloc_server(); | |
800 | if (!server) | |
801 | return ERR_PTR(-ENOMEM); | |
802 | ||
803 | /* Get a client representation */ | |
804 | error = nfs_init_server(server, data); | |
805 | if (error < 0) | |
806 | goto error; | |
807 | ||
808 | BUG_ON(!server->nfs_client); | |
809 | BUG_ON(!server->nfs_client->rpc_ops); | |
810 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
811 | ||
812 | /* Probe the root fh to retrieve its FSID */ | |
813 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
814 | if (error < 0) | |
815 | goto error; | |
816 | if (!(fattr.valid & NFS_ATTR_FATTR)) { | |
817 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
818 | if (error < 0) { | |
819 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
820 | goto error; | |
821 | } | |
822 | } | |
823 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
824 | ||
6daabf1b DH |
825 | dprintk("Server FSID: %llx:%llx\n", |
826 | (unsigned long long) server->fsid.major, | |
827 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
828 | |
829 | BUG_ON(!server->nfs_client); | |
830 | BUG_ON(!server->nfs_client->rpc_ops); | |
831 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
832 | ||
833 | spin_lock(&nfs_client_lock); | |
834 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
835 | list_add_tail(&server->master_link, &nfs_volume_list); | |
836 | spin_unlock(&nfs_client_lock); | |
837 | ||
838 | server->mount_time = jiffies; | |
839 | return server; | |
840 | ||
841 | error: | |
842 | nfs_free_server(server); | |
843 | return ERR_PTR(error); | |
844 | } | |
845 | ||
846 | #ifdef CONFIG_NFS_V4 | |
847 | /* | |
848 | * Initialise an NFS4 client record | |
849 | */ | |
850 | static int nfs4_init_client(struct nfs_client *clp, | |
851 | int proto, int timeo, int retrans, | |
852 | rpc_authflavor_t authflavour) | |
853 | { | |
854 | int error; | |
855 | ||
856 | if (clp->cl_cons_state == NFS_CS_READY) { | |
857 | /* the client is initialised already */ | |
858 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* Check NFS protocol revision and initialize RPC op vector */ | |
863 | clp->rpc_ops = &nfs_v4_clientops; | |
864 | ||
865 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour); | |
866 | if (error < 0) | |
867 | goto error; | |
868 | ||
869 | error = nfs_idmap_new(clp); | |
870 | if (error < 0) { | |
871 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
872 | __FUNCTION__, error); | |
54ceac45 DH |
873 | goto error; |
874 | } | |
9c5bf38d | 875 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
876 | |
877 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
878 | return 0; | |
879 | ||
880 | error: | |
881 | nfs_mark_client_ready(clp, error); | |
882 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
883 | return error; | |
884 | } | |
885 | ||
886 | /* | |
887 | * Set up an NFS4 client | |
888 | */ | |
889 | static int nfs4_set_client(struct nfs_server *server, | |
890 | const char *hostname, const struct sockaddr_in *addr, | |
891 | rpc_authflavor_t authflavour, | |
892 | int proto, int timeo, int retrans) | |
893 | { | |
894 | struct nfs_client *clp; | |
895 | int error; | |
896 | ||
897 | dprintk("--> nfs4_set_client()\n"); | |
898 | ||
899 | /* Allocate or find a client reference we can use */ | |
900 | clp = nfs_get_client(hostname, addr, 4); | |
901 | if (IS_ERR(clp)) { | |
902 | error = PTR_ERR(clp); | |
903 | goto error; | |
904 | } | |
905 | error = nfs4_init_client(clp, proto, timeo, retrans, authflavour); | |
906 | if (error < 0) | |
907 | goto error_put; | |
908 | ||
909 | server->nfs_client = clp; | |
910 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
911 | return 0; | |
912 | ||
913 | error_put: | |
914 | nfs_put_client(clp); | |
915 | error: | |
916 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
917 | return error; | |
918 | } | |
919 | ||
920 | /* | |
921 | * Create a version 4 volume record | |
922 | */ | |
923 | static int nfs4_init_server(struct nfs_server *server, | |
924 | const struct nfs4_mount_data *data, rpc_authflavor_t authflavour) | |
925 | { | |
926 | int error; | |
927 | ||
928 | dprintk("--> nfs4_init_server()\n"); | |
929 | ||
930 | /* Initialise the client representation from the mount data */ | |
931 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
932 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
933 | ||
934 | if (data->rsize) | |
935 | server->rsize = nfs_block_size(data->rsize, NULL); | |
936 | if (data->wsize) | |
937 | server->wsize = nfs_block_size(data->wsize, NULL); | |
938 | ||
939 | server->acregmin = data->acregmin * HZ; | |
940 | server->acregmax = data->acregmax * HZ; | |
941 | server->acdirmin = data->acdirmin * HZ; | |
942 | server->acdirmax = data->acdirmax * HZ; | |
943 | ||
944 | error = nfs_init_server_rpcclient(server, authflavour); | |
945 | ||
946 | /* Done */ | |
947 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
948 | return error; | |
949 | } | |
950 | ||
951 | /* | |
952 | * Create a version 4 volume record | |
953 | * - keyed on server and FSID | |
954 | */ | |
955 | struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data, | |
956 | const char *hostname, | |
957 | const struct sockaddr_in *addr, | |
958 | const char *mntpath, | |
959 | const char *ip_addr, | |
960 | rpc_authflavor_t authflavour, | |
961 | struct nfs_fh *mntfh) | |
962 | { | |
963 | struct nfs_fattr fattr; | |
964 | struct nfs_server *server; | |
965 | int error; | |
966 | ||
967 | dprintk("--> nfs4_create_server()\n"); | |
968 | ||
969 | server = nfs_alloc_server(); | |
970 | if (!server) | |
971 | return ERR_PTR(-ENOMEM); | |
972 | ||
973 | /* Get a client record */ | |
974 | error = nfs4_set_client(server, hostname, addr, authflavour, | |
975 | data->proto, data->timeo, data->retrans); | |
976 | if (error < 0) | |
977 | goto error; | |
978 | ||
979 | /* set up the general RPC client */ | |
980 | error = nfs4_init_server(server, data, authflavour); | |
981 | if (error < 0) | |
982 | goto error; | |
983 | ||
984 | BUG_ON(!server->nfs_client); | |
985 | BUG_ON(!server->nfs_client->rpc_ops); | |
986 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
987 | ||
988 | /* Probe the root fh to retrieve its FSID */ | |
989 | error = nfs4_path_walk(server, mntfh, mntpath); | |
990 | if (error < 0) | |
991 | goto error; | |
992 | ||
6daabf1b DH |
993 | dprintk("Server FSID: %llx:%llx\n", |
994 | (unsigned long long) server->fsid.major, | |
995 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
996 | dprintk("Mount FH: %d\n", mntfh->size); |
997 | ||
998 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
999 | if (error < 0) | |
1000 | goto error; | |
1001 | ||
1002 | BUG_ON(!server->nfs_client); | |
1003 | BUG_ON(!server->nfs_client->rpc_ops); | |
1004 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1005 | ||
1006 | spin_lock(&nfs_client_lock); | |
1007 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1008 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1009 | spin_unlock(&nfs_client_lock); | |
1010 | ||
1011 | server->mount_time = jiffies; | |
1012 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1013 | return server; | |
1014 | ||
1015 | error: | |
1016 | nfs_free_server(server); | |
1017 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1018 | return ERR_PTR(error); | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Create an NFS4 referral server record | |
1023 | */ | |
1024 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1025 | struct nfs_fh *fh) | |
1026 | { | |
1027 | struct nfs_client *parent_client; | |
1028 | struct nfs_server *server, *parent_server; | |
1029 | struct nfs_fattr fattr; | |
1030 | int error; | |
1031 | ||
1032 | dprintk("--> nfs4_create_referral_server()\n"); | |
1033 | ||
1034 | server = nfs_alloc_server(); | |
1035 | if (!server) | |
1036 | return ERR_PTR(-ENOMEM); | |
1037 | ||
1038 | parent_server = NFS_SB(data->sb); | |
1039 | parent_client = parent_server->nfs_client; | |
1040 | ||
1041 | /* Get a client representation. | |
1042 | * Note: NFSv4 always uses TCP, */ | |
1043 | error = nfs4_set_client(server, data->hostname, data->addr, | |
1044 | data->authflavor, | |
1045 | parent_server->client->cl_xprt->prot, | |
1046 | parent_client->retrans_timeo, | |
1047 | parent_client->retrans_count); | |
297de4f6 | 1048 | if (error < 0) |
1049 | goto error; | |
54ceac45 DH |
1050 | |
1051 | /* Initialise the client representation from the parent server */ | |
1052 | nfs_server_copy_userdata(server, parent_server); | |
1053 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1054 | ||
1055 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1056 | if (error < 0) | |
1057 | goto error; | |
1058 | ||
1059 | BUG_ON(!server->nfs_client); | |
1060 | BUG_ON(!server->nfs_client->rpc_ops); | |
1061 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1062 | ||
1063 | /* probe the filesystem info for this server filesystem */ | |
1064 | error = nfs_probe_fsinfo(server, fh, &fattr); | |
1065 | if (error < 0) | |
1066 | goto error; | |
1067 | ||
1068 | dprintk("Referral FSID: %llx:%llx\n", | |
6daabf1b DH |
1069 | (unsigned long long) server->fsid.major, |
1070 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1071 | |
1072 | spin_lock(&nfs_client_lock); | |
1073 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1074 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1075 | spin_unlock(&nfs_client_lock); | |
1076 | ||
1077 | server->mount_time = jiffies; | |
1078 | ||
1079 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1080 | return server; | |
1081 | ||
1082 | error: | |
1083 | nfs_free_server(server); | |
1084 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1085 | return ERR_PTR(error); | |
1086 | } | |
1087 | ||
1088 | #endif /* CONFIG_NFS_V4 */ | |
1089 | ||
1090 | /* | |
1091 | * Clone an NFS2, NFS3 or NFS4 server record | |
1092 | */ | |
1093 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1094 | struct nfs_fh *fh, | |
1095 | struct nfs_fattr *fattr) | |
1096 | { | |
1097 | struct nfs_server *server; | |
1098 | struct nfs_fattr fattr_fsinfo; | |
1099 | int error; | |
1100 | ||
1101 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1102 | (unsigned long long) fattr->fsid.major, |
1103 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1104 | |
1105 | server = nfs_alloc_server(); | |
1106 | if (!server) | |
1107 | return ERR_PTR(-ENOMEM); | |
1108 | ||
1109 | /* Copy data from the source */ | |
1110 | server->nfs_client = source->nfs_client; | |
1111 | atomic_inc(&server->nfs_client->cl_count); | |
1112 | nfs_server_copy_userdata(server, source); | |
1113 | ||
1114 | server->fsid = fattr->fsid; | |
1115 | ||
1116 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1117 | if (error < 0) | |
1118 | goto out_free_server; | |
1119 | if (!IS_ERR(source->client_acl)) | |
1120 | nfs_init_server_aclclient(server); | |
1121 | ||
1122 | /* probe the filesystem info for this server filesystem */ | |
1123 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1124 | if (error < 0) | |
1125 | goto out_free_server; | |
1126 | ||
1127 | dprintk("Cloned FSID: %llx:%llx\n", | |
6daabf1b DH |
1128 | (unsigned long long) server->fsid.major, |
1129 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1130 | |
1131 | error = nfs_start_lockd(server); | |
1132 | if (error < 0) | |
1133 | goto out_free_server; | |
1134 | ||
1135 | spin_lock(&nfs_client_lock); | |
1136 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1137 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1138 | spin_unlock(&nfs_client_lock); | |
1139 | ||
1140 | server->mount_time = jiffies; | |
1141 | ||
1142 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1143 | return server; | |
1144 | ||
1145 | out_free_server: | |
1146 | nfs_free_server(server); | |
1147 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1148 | return ERR_PTR(error); | |
1149 | } | |
6aaca566 DH |
1150 | |
1151 | #ifdef CONFIG_PROC_FS | |
1152 | static struct proc_dir_entry *proc_fs_nfs; | |
1153 | ||
1154 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1155 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1156 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1157 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1158 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1159 | ||
1160 | static struct seq_operations nfs_server_list_ops = { | |
1161 | .start = nfs_server_list_start, | |
1162 | .next = nfs_server_list_next, | |
1163 | .stop = nfs_server_list_stop, | |
1164 | .show = nfs_server_list_show, | |
1165 | }; | |
1166 | ||
1167 | static struct file_operations nfs_server_list_fops = { | |
1168 | .open = nfs_server_list_open, | |
1169 | .read = seq_read, | |
1170 | .llseek = seq_lseek, | |
1171 | .release = seq_release, | |
1172 | }; | |
1173 | ||
1174 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1175 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1176 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1177 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1178 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1179 | ||
1180 | static struct seq_operations nfs_volume_list_ops = { | |
1181 | .start = nfs_volume_list_start, | |
1182 | .next = nfs_volume_list_next, | |
1183 | .stop = nfs_volume_list_stop, | |
1184 | .show = nfs_volume_list_show, | |
1185 | }; | |
1186 | ||
1187 | static struct file_operations nfs_volume_list_fops = { | |
1188 | .open = nfs_volume_list_open, | |
1189 | .read = seq_read, | |
1190 | .llseek = seq_lseek, | |
1191 | .release = seq_release, | |
1192 | }; | |
1193 | ||
1194 | /* | |
1195 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1196 | * we're dealing | |
1197 | */ | |
1198 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1199 | { | |
1200 | struct seq_file *m; | |
1201 | int ret; | |
1202 | ||
1203 | ret = seq_open(file, &nfs_server_list_ops); | |
1204 | if (ret < 0) | |
1205 | return ret; | |
1206 | ||
1207 | m = file->private_data; | |
1208 | m->private = PDE(inode)->data; | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * set up the iterator to start reading from the server list and return the first item | |
1215 | */ | |
1216 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1217 | { | |
1218 | struct list_head *_p; | |
1219 | loff_t pos = *_pos; | |
1220 | ||
1221 | /* lock the list against modification */ | |
1222 | spin_lock(&nfs_client_lock); | |
1223 | ||
1224 | /* allow for the header line */ | |
1225 | if (!pos) | |
1226 | return SEQ_START_TOKEN; | |
1227 | pos--; | |
1228 | ||
1229 | /* find the n'th element in the list */ | |
1230 | list_for_each(_p, &nfs_client_list) | |
1231 | if (!pos--) | |
1232 | break; | |
1233 | ||
1234 | return _p != &nfs_client_list ? _p : NULL; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * move to next server | |
1239 | */ | |
1240 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1241 | { | |
1242 | struct list_head *_p; | |
1243 | ||
1244 | (*pos)++; | |
1245 | ||
1246 | _p = v; | |
1247 | _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next; | |
1248 | ||
1249 | return _p != &nfs_client_list ? _p : NULL; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * clean up after reading from the transports list | |
1254 | */ | |
1255 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1256 | { | |
1257 | spin_unlock(&nfs_client_lock); | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * display a header line followed by a load of call lines | |
1262 | */ | |
1263 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1264 | { | |
1265 | struct nfs_client *clp; | |
1266 | ||
1267 | /* display header on line 1 */ | |
1268 | if (v == SEQ_START_TOKEN) { | |
1269 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | /* display one transport per line on subsequent lines */ | |
1274 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1275 | ||
1276 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1277 | clp->cl_nfsversion, | |
1278 | NIPQUAD(clp->cl_addr.sin_addr), | |
1279 | ntohs(clp->cl_addr.sin_port), | |
1280 | atomic_read(&clp->cl_count), | |
1281 | clp->cl_hostname); | |
1282 | ||
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1288 | */ | |
1289 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1290 | { | |
1291 | struct seq_file *m; | |
1292 | int ret; | |
1293 | ||
1294 | ret = seq_open(file, &nfs_volume_list_ops); | |
1295 | if (ret < 0) | |
1296 | return ret; | |
1297 | ||
1298 | m = file->private_data; | |
1299 | m->private = PDE(inode)->data; | |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * set up the iterator to start reading from the volume list and return the first item | |
1306 | */ | |
1307 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1308 | { | |
1309 | struct list_head *_p; | |
1310 | loff_t pos = *_pos; | |
1311 | ||
1312 | /* lock the list against modification */ | |
1313 | spin_lock(&nfs_client_lock); | |
1314 | ||
1315 | /* allow for the header line */ | |
1316 | if (!pos) | |
1317 | return SEQ_START_TOKEN; | |
1318 | pos--; | |
1319 | ||
1320 | /* find the n'th element in the list */ | |
1321 | list_for_each(_p, &nfs_volume_list) | |
1322 | if (!pos--) | |
1323 | break; | |
1324 | ||
1325 | return _p != &nfs_volume_list ? _p : NULL; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * move to next volume | |
1330 | */ | |
1331 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1332 | { | |
1333 | struct list_head *_p; | |
1334 | ||
1335 | (*pos)++; | |
1336 | ||
1337 | _p = v; | |
1338 | _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next; | |
1339 | ||
1340 | return _p != &nfs_volume_list ? _p : NULL; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * clean up after reading from the transports list | |
1345 | */ | |
1346 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1347 | { | |
1348 | spin_unlock(&nfs_client_lock); | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * display a header line followed by a load of call lines | |
1353 | */ | |
1354 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1355 | { | |
1356 | struct nfs_server *server; | |
1357 | struct nfs_client *clp; | |
1358 | char dev[8], fsid[17]; | |
1359 | ||
1360 | /* display header on line 1 */ | |
1361 | if (v == SEQ_START_TOKEN) { | |
1362 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); | |
1363 | return 0; | |
1364 | } | |
1365 | /* display one transport per line on subsequent lines */ | |
1366 | server = list_entry(v, struct nfs_server, master_link); | |
1367 | clp = server->nfs_client; | |
1368 | ||
1369 | snprintf(dev, 8, "%u:%u", | |
1370 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1371 | ||
1372 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1373 | (unsigned long long) server->fsid.major, |
1374 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1375 | |
1376 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1377 | clp->cl_nfsversion, | |
1378 | NIPQUAD(clp->cl_addr.sin_addr), | |
1379 | ntohs(clp->cl_addr.sin_port), | |
1380 | dev, | |
1381 | fsid); | |
1382 | ||
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * initialise the /proc/fs/nfsfs/ directory | |
1388 | */ | |
1389 | int __init nfs_fs_proc_init(void) | |
1390 | { | |
1391 | struct proc_dir_entry *p; | |
1392 | ||
1393 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1394 | if (!proc_fs_nfs) | |
1395 | goto error_0; | |
1396 | ||
1397 | proc_fs_nfs->owner = THIS_MODULE; | |
1398 | ||
1399 | /* a file of servers with which we're dealing */ | |
1400 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1401 | if (!p) | |
1402 | goto error_1; | |
1403 | ||
1404 | p->proc_fops = &nfs_server_list_fops; | |
1405 | p->owner = THIS_MODULE; | |
1406 | ||
1407 | /* a file of volumes that we have mounted */ | |
1408 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1409 | if (!p) | |
1410 | goto error_2; | |
1411 | ||
1412 | p->proc_fops = &nfs_volume_list_fops; | |
1413 | p->owner = THIS_MODULE; | |
1414 | return 0; | |
1415 | ||
1416 | error_2: | |
1417 | remove_proc_entry("servers", proc_fs_nfs); | |
1418 | error_1: | |
1419 | remove_proc_entry("nfsfs", proc_root_fs); | |
1420 | error_0: | |
1421 | return -ENOMEM; | |
1422 | } | |
1423 | ||
1424 | /* | |
1425 | * clean up the /proc/fs/nfsfs/ directory | |
1426 | */ | |
1427 | void nfs_fs_proc_exit(void) | |
1428 | { | |
1429 | remove_proc_entry("volumes", proc_fs_nfs); | |
1430 | remove_proc_entry("servers", proc_fs_nfs); | |
1431 | remove_proc_entry("nfsfs", proc_root_fs); | |
1432 | } | |
1433 | ||
1434 | #endif /* CONFIG_PROC_FS */ |