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Commit | Line | Data |
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24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
24c8dbbb DH |
27 | #include <linux/nfs_fs.h> |
28 | #include <linux/nfs_mount.h> | |
29 | #include <linux/nfs4_mount.h> | |
30 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
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; | |
24c8dbbb DH |
106 | |
107 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
108 | goto error_0; | |
109 | ||
24c8dbbb DH |
110 | if (nfsversion == 4) { |
111 | if (nfs_callback_up() < 0) | |
112 | goto error_2; | |
113 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
114 | } | |
115 | ||
116 | atomic_set(&clp->cl_count, 1); | |
117 | clp->cl_cons_state = NFS_CS_INITING; | |
118 | ||
119 | clp->cl_nfsversion = nfsversion; | |
120 | memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr)); | |
121 | ||
122 | if (hostname) { | |
123 | clp->cl_hostname = kstrdup(hostname, GFP_KERNEL); | |
124 | if (!clp->cl_hostname) | |
125 | goto error_3; | |
126 | } | |
127 | ||
128 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
129 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
130 | ||
131 | #ifdef CONFIG_NFS_V4 | |
132 | init_rwsem(&clp->cl_sem); | |
133 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 134 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 135 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
136 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
137 | clp->cl_boot_time = CURRENT_TIME; | |
138 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
139 | #endif | |
140 | ||
141 | return clp; | |
142 | ||
143 | error_3: | |
9c5bf38d TM |
144 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
145 | nfs_callback_down(); | |
24c8dbbb | 146 | error_2: |
24c8dbbb DH |
147 | kfree(clp); |
148 | error_0: | |
149 | return NULL; | |
150 | } | |
151 | ||
5dd3177a TM |
152 | static void nfs4_shutdown_client(struct nfs_client *clp) |
153 | { | |
154 | #ifdef CONFIG_NFS_V4 | |
155 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
156 | nfs4_kill_renewd(clp); | |
9f958ab8 | 157 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
158 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
159 | nfs_idmap_delete(clp); | |
160 | #endif | |
161 | } | |
162 | ||
24c8dbbb DH |
163 | /* |
164 | * Destroy a shared client record | |
165 | */ | |
166 | static void nfs_free_client(struct nfs_client *clp) | |
167 | { | |
168 | dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion); | |
169 | ||
5dd3177a | 170 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
171 | |
172 | /* -EIO all pending I/O */ | |
173 | if (!IS_ERR(clp->cl_rpcclient)) | |
174 | rpc_shutdown_client(clp->cl_rpcclient); | |
175 | ||
176 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
177 | nfs_callback_down(); | |
178 | ||
24c8dbbb DH |
179 | kfree(clp->cl_hostname); |
180 | kfree(clp); | |
181 | ||
182 | dprintk("<-- nfs_free_client()\n"); | |
183 | } | |
184 | ||
185 | /* | |
186 | * Release a reference to a shared client record | |
187 | */ | |
188 | void nfs_put_client(struct nfs_client *clp) | |
189 | { | |
27ba8512 DH |
190 | if (!clp) |
191 | return; | |
192 | ||
24c8dbbb DH |
193 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
194 | ||
195 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
196 | list_del(&clp->cl_share_link); | |
197 | spin_unlock(&nfs_client_lock); | |
198 | ||
199 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
200 | ||
201 | nfs_free_client(clp); | |
202 | } | |
203 | } | |
204 | ||
205 | /* | |
206 | * Find a client by address | |
207 | * - caller must hold nfs_client_lock | |
208 | */ | |
13bbc06a | 209 | static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion, int match_port) |
24c8dbbb DH |
210 | { |
211 | struct nfs_client *clp; | |
212 | ||
213 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
13bbc06a TM |
214 | /* Don't match clients that failed to initialise properly */ |
215 | if (clp->cl_cons_state < 0) | |
216 | continue; | |
217 | ||
24c8dbbb DH |
218 | /* Different NFS versions cannot share the same nfs_client */ |
219 | if (clp->cl_nfsversion != nfsversion) | |
220 | continue; | |
221 | ||
222 | if (memcmp(&clp->cl_addr.sin_addr, &addr->sin_addr, | |
223 | sizeof(clp->cl_addr.sin_addr)) != 0) | |
224 | continue; | |
225 | ||
13bbc06a | 226 | if (!match_port || clp->cl_addr.sin_port == addr->sin_port) |
24c8dbbb DH |
227 | goto found; |
228 | } | |
229 | ||
230 | return NULL; | |
231 | ||
232 | found: | |
233 | atomic_inc(&clp->cl_count); | |
234 | return clp; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Find a client by IP address and protocol version | |
239 | * - returns NULL if no such client | |
240 | */ | |
241 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
242 | { | |
243 | struct nfs_client *clp; | |
244 | ||
245 | spin_lock(&nfs_client_lock); | |
13bbc06a | 246 | clp = __nfs_find_client(addr, nfsversion, 0); |
24c8dbbb | 247 | spin_unlock(&nfs_client_lock); |
13bbc06a TM |
248 | if (clp != NULL && clp->cl_cons_state != NFS_CS_READY) { |
249 | nfs_put_client(clp); | |
250 | clp = NULL; | |
251 | } | |
24c8dbbb DH |
252 | return clp; |
253 | } | |
254 | ||
255 | /* | |
256 | * Look up a client by IP address and protocol version | |
257 | * - creates a new record if one doesn't yet exist | |
258 | */ | |
54ceac45 DH |
259 | static struct nfs_client *nfs_get_client(const char *hostname, |
260 | const struct sockaddr_in *addr, | |
261 | int nfsversion) | |
24c8dbbb DH |
262 | { |
263 | struct nfs_client *clp, *new = NULL; | |
264 | int error; | |
265 | ||
266 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n", | |
267 | hostname ?: "", NIPQUAD(addr->sin_addr), | |
268 | addr->sin_port, nfsversion); | |
269 | ||
270 | /* see if the client already exists */ | |
271 | do { | |
272 | spin_lock(&nfs_client_lock); | |
273 | ||
13bbc06a | 274 | clp = __nfs_find_client(addr, nfsversion, 1); |
24c8dbbb DH |
275 | if (clp) |
276 | goto found_client; | |
277 | if (new) | |
278 | goto install_client; | |
279 | ||
280 | spin_unlock(&nfs_client_lock); | |
281 | ||
282 | new = nfs_alloc_client(hostname, addr, nfsversion); | |
283 | } while (new); | |
284 | ||
285 | return ERR_PTR(-ENOMEM); | |
286 | ||
287 | /* install a new client and return with it unready */ | |
288 | install_client: | |
289 | clp = new; | |
290 | list_add(&clp->cl_share_link, &nfs_client_list); | |
291 | spin_unlock(&nfs_client_lock); | |
292 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
293 | return clp; | |
294 | ||
295 | /* found an existing client | |
296 | * - make sure it's ready before returning | |
297 | */ | |
298 | found_client: | |
299 | spin_unlock(&nfs_client_lock); | |
300 | ||
301 | if (new) | |
302 | nfs_free_client(new); | |
303 | ||
83250493 | 304 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
305 | clp->cl_cons_state != NFS_CS_INITING); |
306 | if (error < 0) { | |
307 | nfs_put_client(clp); | |
308 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
309 | } |
310 | ||
311 | if (clp->cl_cons_state < NFS_CS_READY) { | |
312 | error = clp->cl_cons_state; | |
313 | nfs_put_client(clp); | |
314 | return ERR_PTR(error); | |
315 | } | |
316 | ||
54ceac45 DH |
317 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
318 | ||
24c8dbbb DH |
319 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
320 | return clp; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Mark a server as ready or failed | |
325 | */ | |
54ceac45 | 326 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
327 | { |
328 | clp->cl_cons_state = state; | |
329 | wake_up_all(&nfs_client_active_wq); | |
330 | } | |
5006a76c DH |
331 | |
332 | /* | |
333 | * Initialise the timeout values for a connection | |
334 | */ | |
335 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
336 | unsigned int timeo, unsigned int retrans) | |
337 | { | |
338 | to->to_initval = timeo * HZ / 10; | |
339 | to->to_retries = retrans; | |
340 | if (!to->to_retries) | |
341 | to->to_retries = 2; | |
342 | ||
343 | switch (proto) { | |
0896a725 | 344 | case XPRT_TRANSPORT_TCP: |
5006a76c DH |
345 | if (!to->to_initval) |
346 | to->to_initval = 60 * HZ; | |
347 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
348 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
349 | to->to_increment = to->to_initval; | |
350 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
351 | to->to_exponential = 0; | |
352 | break; | |
0896a725 | 353 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
354 | default: |
355 | if (!to->to_initval) | |
356 | to->to_initval = 11 * HZ / 10; | |
357 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
358 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
359 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
360 | to->to_exponential = 1; | |
361 | break; | |
362 | } | |
363 | } | |
364 | ||
365 | /* | |
366 | * Create an RPC client handle | |
367 | */ | |
54ceac45 DH |
368 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
369 | unsigned int timeo, | |
370 | unsigned int retrans, | |
43d78ef2 CL |
371 | rpc_authflavor_t flavor, |
372 | int flags) | |
5006a76c DH |
373 | { |
374 | struct rpc_timeout timeparms; | |
5006a76c | 375 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
376 | struct rpc_create_args args = { |
377 | .protocol = proto, | |
378 | .address = (struct sockaddr *)&clp->cl_addr, | |
379 | .addrsize = sizeof(clp->cl_addr), | |
380 | .timeout = &timeparms, | |
381 | .servername = clp->cl_hostname, | |
382 | .program = &nfs_program, | |
383 | .version = clp->rpc_ops->version, | |
384 | .authflavor = flavor, | |
43d78ef2 | 385 | .flags = flags, |
41877d20 | 386 | }; |
5006a76c DH |
387 | |
388 | if (!IS_ERR(clp->cl_rpcclient)) | |
389 | return 0; | |
390 | ||
391 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
392 | clp->retrans_timeo = timeparms.to_initval; | |
393 | clp->retrans_count = timeparms.to_retries; | |
394 | ||
41877d20 | 395 | clnt = rpc_create(&args); |
5006a76c DH |
396 | if (IS_ERR(clnt)) { |
397 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
398 | __FUNCTION__, PTR_ERR(clnt)); | |
399 | return PTR_ERR(clnt); | |
400 | } | |
401 | ||
5006a76c DH |
402 | clp->cl_rpcclient = clnt; |
403 | return 0; | |
404 | } | |
54ceac45 DH |
405 | |
406 | /* | |
407 | * Version 2 or 3 client destruction | |
408 | */ | |
409 | static void nfs_destroy_server(struct nfs_server *server) | |
410 | { | |
411 | if (!IS_ERR(server->client_acl)) | |
412 | rpc_shutdown_client(server->client_acl); | |
413 | ||
414 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
415 | lockd_down(); /* release rpc.lockd */ | |
416 | } | |
417 | ||
418 | /* | |
419 | * Version 2 or 3 lockd setup | |
420 | */ | |
421 | static int nfs_start_lockd(struct nfs_server *server) | |
422 | { | |
423 | int error = 0; | |
424 | ||
425 | if (server->nfs_client->cl_nfsversion > 3) | |
426 | goto out; | |
427 | if (server->flags & NFS_MOUNT_NONLM) | |
428 | goto out; | |
24e36663 N |
429 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
430 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
431 | if (error < 0) |
432 | server->flags |= NFS_MOUNT_NONLM; | |
433 | else | |
434 | server->destroy = nfs_destroy_server; | |
435 | out: | |
436 | return error; | |
437 | } | |
438 | ||
439 | /* | |
440 | * Initialise an NFSv3 ACL client connection | |
441 | */ | |
442 | #ifdef CONFIG_NFS_V3_ACL | |
443 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
444 | { | |
445 | if (server->nfs_client->cl_nfsversion != 3) | |
446 | goto out_noacl; | |
447 | if (server->flags & NFS_MOUNT_NOACL) | |
448 | goto out_noacl; | |
449 | ||
450 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
451 | if (IS_ERR(server->client_acl)) | |
452 | goto out_noacl; | |
453 | ||
454 | /* No errors! Assume that Sun nfsacls are supported */ | |
455 | server->caps |= NFS_CAP_ACLS; | |
456 | return; | |
457 | ||
458 | out_noacl: | |
459 | server->caps &= ~NFS_CAP_ACLS; | |
460 | } | |
461 | #else | |
462 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
463 | { | |
464 | server->flags &= ~NFS_MOUNT_NOACL; | |
465 | server->caps &= ~NFS_CAP_ACLS; | |
466 | } | |
467 | #endif | |
468 | ||
469 | /* | |
470 | * Create a general RPC client | |
471 | */ | |
472 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
473 | { | |
474 | struct nfs_client *clp = server->nfs_client; | |
475 | ||
476 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
477 | if (IS_ERR(server->client)) { | |
478 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
479 | return PTR_ERR(server->client); | |
480 | } | |
481 | ||
482 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
483 | struct rpc_auth *auth; | |
484 | ||
485 | auth = rpcauth_create(pseudoflavour, server->client); | |
486 | if (IS_ERR(auth)) { | |
487 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
488 | return PTR_ERR(auth); | |
489 | } | |
490 | } | |
491 | server->client->cl_softrtry = 0; | |
492 | if (server->flags & NFS_MOUNT_SOFT) | |
493 | server->client->cl_softrtry = 1; | |
494 | ||
495 | server->client->cl_intr = 0; | |
496 | if (server->flags & NFS4_MOUNT_INTR) | |
497 | server->client->cl_intr = 1; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | /* | |
503 | * Initialise an NFS2 or NFS3 client | |
504 | */ | |
2283f8d6 TT |
505 | static int nfs_init_client(struct nfs_client *clp, |
506 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 507 | { |
54ceac45 DH |
508 | int error; |
509 | ||
510 | if (clp->cl_cons_state == NFS_CS_READY) { | |
511 | /* the client is already initialised */ | |
512 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
513 | return 0; | |
514 | } | |
515 | ||
516 | /* Check NFS protocol revision and initialize RPC op vector */ | |
517 | clp->rpc_ops = &nfs_v2_clientops; | |
518 | #ifdef CONFIG_NFS_V3 | |
519 | if (clp->cl_nfsversion == 3) | |
520 | clp->rpc_ops = &nfs_v3_clientops; | |
521 | #endif | |
522 | /* | |
523 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
524 | * - RFC 2623, sec 2.3.2 | |
525 | */ | |
2283f8d6 TT |
526 | error = nfs_create_rpc_client(clp, data->nfs_server.protocol, |
527 | data->timeo, data->retrans, RPC_AUTH_UNIX, 0); | |
54ceac45 DH |
528 | if (error < 0) |
529 | goto error; | |
530 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
531 | return 0; | |
532 | ||
533 | error: | |
534 | nfs_mark_client_ready(clp, error); | |
535 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
536 | return error; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Create a version 2 or 3 client | |
541 | */ | |
2283f8d6 TT |
542 | static int nfs_init_server(struct nfs_server *server, |
543 | const struct nfs_parsed_mount_data *data) | |
54ceac45 DH |
544 | { |
545 | struct nfs_client *clp; | |
546 | int error, nfsvers = 2; | |
547 | ||
548 | dprintk("--> nfs_init_server()\n"); | |
549 | ||
550 | #ifdef CONFIG_NFS_V3 | |
551 | if (data->flags & NFS_MOUNT_VER3) | |
552 | nfsvers = 3; | |
553 | #endif | |
554 | ||
555 | /* Allocate or find a client reference we can use */ | |
2283f8d6 TT |
556 | clp = nfs_get_client(data->nfs_server.hostname, |
557 | &data->nfs_server.address, nfsvers); | |
54ceac45 DH |
558 | if (IS_ERR(clp)) { |
559 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
560 | return PTR_ERR(clp); | |
561 | } | |
562 | ||
563 | error = nfs_init_client(clp, data); | |
564 | if (error < 0) | |
565 | goto error; | |
566 | ||
567 | server->nfs_client = clp; | |
568 | ||
569 | /* Initialise the client representation from the mount data */ | |
570 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
571 | ||
572 | if (data->rsize) | |
573 | server->rsize = nfs_block_size(data->rsize, NULL); | |
574 | if (data->wsize) | |
575 | server->wsize = nfs_block_size(data->wsize, NULL); | |
576 | ||
577 | server->acregmin = data->acregmin * HZ; | |
578 | server->acregmax = data->acregmax * HZ; | |
579 | server->acdirmin = data->acdirmin * HZ; | |
580 | server->acdirmax = data->acdirmax * HZ; | |
581 | ||
582 | /* Start lockd here, before we might error out */ | |
583 | error = nfs_start_lockd(server); | |
584 | if (error < 0) | |
585 | goto error; | |
586 | ||
2283f8d6 | 587 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
588 | if (error < 0) |
589 | goto error; | |
590 | ||
591 | server->namelen = data->namlen; | |
592 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
593 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
594 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
595 | return 0; | |
596 | ||
597 | error: | |
598 | server->nfs_client = NULL; | |
599 | nfs_put_client(clp); | |
600 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
601 | return error; | |
602 | } | |
603 | ||
604 | /* | |
605 | * Load up the server record from information gained in an fsinfo record | |
606 | */ | |
607 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
608 | { | |
609 | unsigned long max_rpc_payload; | |
610 | ||
611 | /* Work out a lot of parameters */ | |
612 | if (server->rsize == 0) | |
613 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
614 | if (server->wsize == 0) | |
615 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
616 | ||
617 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
618 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
619 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
620 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
621 | ||
622 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
623 | if (server->rsize > max_rpc_payload) | |
624 | server->rsize = max_rpc_payload; | |
625 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
626 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
627 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
628 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
629 | ||
630 | if (server->wsize > max_rpc_payload) | |
631 | server->wsize = max_rpc_payload; | |
632 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
633 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
634 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
635 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
636 | ||
637 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
638 | if (server->dtsize > PAGE_CACHE_SIZE) | |
639 | server->dtsize = PAGE_CACHE_SIZE; | |
640 | if (server->dtsize > server->rsize) | |
641 | server->dtsize = server->rsize; | |
642 | ||
643 | if (server->flags & NFS_MOUNT_NOAC) { | |
644 | server->acregmin = server->acregmax = 0; | |
645 | server->acdirmin = server->acdirmax = 0; | |
646 | } | |
647 | ||
648 | server->maxfilesize = fsinfo->maxfilesize; | |
649 | ||
650 | /* We're airborne Set socket buffersize */ | |
651 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
652 | } | |
653 | ||
654 | /* | |
655 | * Probe filesystem information, including the FSID on v2/v3 | |
656 | */ | |
657 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
658 | { | |
659 | struct nfs_fsinfo fsinfo; | |
660 | struct nfs_client *clp = server->nfs_client; | |
661 | int error; | |
662 | ||
663 | dprintk("--> nfs_probe_fsinfo()\n"); | |
664 | ||
665 | if (clp->rpc_ops->set_capabilities != NULL) { | |
666 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
667 | if (error < 0) | |
668 | goto out_error; | |
669 | } | |
670 | ||
671 | fsinfo.fattr = fattr; | |
672 | nfs_fattr_init(fattr); | |
673 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
674 | if (error < 0) | |
675 | goto out_error; | |
676 | ||
677 | nfs_server_set_fsinfo(server, &fsinfo); | |
678 | ||
679 | /* Get some general file system info */ | |
680 | if (server->namelen == 0) { | |
681 | struct nfs_pathconf pathinfo; | |
682 | ||
683 | pathinfo.fattr = fattr; | |
684 | nfs_fattr_init(fattr); | |
685 | ||
686 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
687 | server->namelen = pathinfo.max_namelen; | |
688 | } | |
689 | ||
690 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
691 | return 0; | |
692 | ||
693 | out_error: | |
694 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
695 | return error; | |
696 | } | |
697 | ||
698 | /* | |
699 | * Copy useful information when duplicating a server record | |
700 | */ | |
701 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
702 | { | |
703 | target->flags = source->flags; | |
704 | target->acregmin = source->acregmin; | |
705 | target->acregmax = source->acregmax; | |
706 | target->acdirmin = source->acdirmin; | |
707 | target->acdirmax = source->acdirmax; | |
708 | target->caps = source->caps; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Allocate and initialise a server record | |
713 | */ | |
714 | static struct nfs_server *nfs_alloc_server(void) | |
715 | { | |
716 | struct nfs_server *server; | |
717 | ||
718 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
719 | if (!server) | |
720 | return NULL; | |
721 | ||
722 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
723 | ||
724 | /* Zero out the NFS state stuff */ | |
725 | INIT_LIST_HEAD(&server->client_link); | |
726 | INIT_LIST_HEAD(&server->master_link); | |
727 | ||
728 | server->io_stats = nfs_alloc_iostats(); | |
729 | if (!server->io_stats) { | |
730 | kfree(server); | |
731 | return NULL; | |
732 | } | |
733 | ||
734 | return server; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Free up a server record | |
739 | */ | |
740 | void nfs_free_server(struct nfs_server *server) | |
741 | { | |
742 | dprintk("--> nfs_free_server()\n"); | |
743 | ||
744 | spin_lock(&nfs_client_lock); | |
745 | list_del(&server->client_link); | |
746 | list_del(&server->master_link); | |
747 | spin_unlock(&nfs_client_lock); | |
748 | ||
749 | if (server->destroy != NULL) | |
750 | server->destroy(server); | |
751 | if (!IS_ERR(server->client)) | |
752 | rpc_shutdown_client(server->client); | |
753 | ||
754 | nfs_put_client(server->nfs_client); | |
755 | ||
756 | nfs_free_iostats(server->io_stats); | |
757 | kfree(server); | |
758 | nfs_release_automount_timer(); | |
759 | dprintk("<-- nfs_free_server()\n"); | |
760 | } | |
761 | ||
762 | /* | |
763 | * Create a version 2 or 3 volume record | |
764 | * - keyed on server and FSID | |
765 | */ | |
2283f8d6 | 766 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
767 | struct nfs_fh *mntfh) |
768 | { | |
769 | struct nfs_server *server; | |
770 | struct nfs_fattr fattr; | |
771 | int error; | |
772 | ||
773 | server = nfs_alloc_server(); | |
774 | if (!server) | |
775 | return ERR_PTR(-ENOMEM); | |
776 | ||
777 | /* Get a client representation */ | |
778 | error = nfs_init_server(server, data); | |
779 | if (error < 0) | |
780 | goto error; | |
781 | ||
782 | BUG_ON(!server->nfs_client); | |
783 | BUG_ON(!server->nfs_client->rpc_ops); | |
784 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
785 | ||
786 | /* Probe the root fh to retrieve its FSID */ | |
787 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
788 | if (error < 0) | |
789 | goto error; | |
54af3bb5 TM |
790 | if (server->nfs_client->rpc_ops->version == 3) { |
791 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
792 | server->namelen = NFS3_MAXNAMLEN; | |
793 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
794 | server->caps |= NFS_CAP_READDIRPLUS; | |
795 | } else { | |
796 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
797 | server->namelen = NFS2_MAXNAMLEN; | |
798 | } | |
799 | ||
54ceac45 DH |
800 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
801 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
802 | if (error < 0) { | |
803 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
804 | goto error; | |
805 | } | |
806 | } | |
807 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
808 | ||
6daabf1b DH |
809 | dprintk("Server FSID: %llx:%llx\n", |
810 | (unsigned long long) server->fsid.major, | |
811 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
812 | |
813 | BUG_ON(!server->nfs_client); | |
814 | BUG_ON(!server->nfs_client->rpc_ops); | |
815 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
816 | ||
817 | spin_lock(&nfs_client_lock); | |
818 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
819 | list_add_tail(&server->master_link, &nfs_volume_list); | |
820 | spin_unlock(&nfs_client_lock); | |
821 | ||
822 | server->mount_time = jiffies; | |
823 | return server; | |
824 | ||
825 | error: | |
826 | nfs_free_server(server); | |
827 | return ERR_PTR(error); | |
828 | } | |
829 | ||
830 | #ifdef CONFIG_NFS_V4 | |
831 | /* | |
832 | * Initialise an NFS4 client record | |
833 | */ | |
834 | static int nfs4_init_client(struct nfs_client *clp, | |
835 | int proto, int timeo, int retrans, | |
7d9ac06f | 836 | const char *ip_addr, |
54ceac45 DH |
837 | rpc_authflavor_t authflavour) |
838 | { | |
839 | int error; | |
840 | ||
841 | if (clp->cl_cons_state == NFS_CS_READY) { | |
842 | /* the client is initialised already */ | |
843 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
844 | return 0; | |
845 | } | |
846 | ||
847 | /* Check NFS protocol revision and initialize RPC op vector */ | |
848 | clp->rpc_ops = &nfs_v4_clientops; | |
849 | ||
43d78ef2 CL |
850 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
851 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
852 | if (error < 0) |
853 | goto error; | |
7d9ac06f | 854 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
855 | |
856 | error = nfs_idmap_new(clp); | |
857 | if (error < 0) { | |
858 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
859 | __FUNCTION__, error); | |
54ceac45 DH |
860 | goto error; |
861 | } | |
9c5bf38d | 862 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
863 | |
864 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
865 | return 0; | |
866 | ||
867 | error: | |
868 | nfs_mark_client_ready(clp, error); | |
869 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
870 | return error; | |
871 | } | |
872 | ||
873 | /* | |
874 | * Set up an NFS4 client | |
875 | */ | |
876 | static int nfs4_set_client(struct nfs_server *server, | |
877 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 878 | const char *ip_addr, |
54ceac45 DH |
879 | rpc_authflavor_t authflavour, |
880 | int proto, int timeo, int retrans) | |
881 | { | |
882 | struct nfs_client *clp; | |
883 | int error; | |
884 | ||
885 | dprintk("--> nfs4_set_client()\n"); | |
886 | ||
887 | /* Allocate or find a client reference we can use */ | |
888 | clp = nfs_get_client(hostname, addr, 4); | |
889 | if (IS_ERR(clp)) { | |
890 | error = PTR_ERR(clp); | |
891 | goto error; | |
892 | } | |
7d9ac06f | 893 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
894 | if (error < 0) |
895 | goto error_put; | |
896 | ||
897 | server->nfs_client = clp; | |
898 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
899 | return 0; | |
900 | ||
901 | error_put: | |
902 | nfs_put_client(clp); | |
903 | error: | |
904 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
905 | return error; | |
906 | } | |
907 | ||
908 | /* | |
909 | * Create a version 4 volume record | |
910 | */ | |
911 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 912 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
913 | { |
914 | int error; | |
915 | ||
916 | dprintk("--> nfs4_init_server()\n"); | |
917 | ||
918 | /* Initialise the client representation from the mount data */ | |
919 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
920 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
921 | ||
922 | if (data->rsize) | |
923 | server->rsize = nfs_block_size(data->rsize, NULL); | |
924 | if (data->wsize) | |
925 | server->wsize = nfs_block_size(data->wsize, NULL); | |
926 | ||
927 | server->acregmin = data->acregmin * HZ; | |
928 | server->acregmax = data->acregmax * HZ; | |
929 | server->acdirmin = data->acdirmin * HZ; | |
930 | server->acdirmax = data->acdirmax * HZ; | |
931 | ||
91ea40b9 | 932 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
933 | |
934 | /* Done */ | |
935 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
936 | return error; | |
937 | } | |
938 | ||
939 | /* | |
940 | * Create a version 4 volume record | |
941 | * - keyed on server and FSID | |
942 | */ | |
91ea40b9 | 943 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
944 | struct nfs_fh *mntfh) |
945 | { | |
946 | struct nfs_fattr fattr; | |
947 | struct nfs_server *server; | |
948 | int error; | |
949 | ||
950 | dprintk("--> nfs4_create_server()\n"); | |
951 | ||
952 | server = nfs_alloc_server(); | |
953 | if (!server) | |
954 | return ERR_PTR(-ENOMEM); | |
955 | ||
956 | /* Get a client record */ | |
91ea40b9 TT |
957 | error = nfs4_set_client(server, |
958 | data->nfs_server.hostname, | |
959 | &data->nfs_server.address, | |
960 | data->client_address, | |
961 | data->auth_flavors[0], | |
962 | data->nfs_server.protocol, | |
963 | data->timeo, data->retrans); | |
54ceac45 DH |
964 | if (error < 0) |
965 | goto error; | |
966 | ||
967 | /* set up the general RPC client */ | |
91ea40b9 | 968 | error = nfs4_init_server(server, data); |
54ceac45 DH |
969 | if (error < 0) |
970 | goto error; | |
971 | ||
972 | BUG_ON(!server->nfs_client); | |
973 | BUG_ON(!server->nfs_client->rpc_ops); | |
974 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
975 | ||
976 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 977 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
978 | if (error < 0) |
979 | goto error; | |
980 | ||
6daabf1b DH |
981 | dprintk("Server FSID: %llx:%llx\n", |
982 | (unsigned long long) server->fsid.major, | |
983 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
984 | dprintk("Mount FH: %d\n", mntfh->size); |
985 | ||
986 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
987 | if (error < 0) | |
988 | goto error; | |
989 | ||
54af3bb5 TM |
990 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
991 | server->namelen = NFS4_MAXNAMLEN; | |
992 | ||
54ceac45 DH |
993 | BUG_ON(!server->nfs_client); |
994 | BUG_ON(!server->nfs_client->rpc_ops); | |
995 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
996 | ||
997 | spin_lock(&nfs_client_lock); | |
998 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
999 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1000 | spin_unlock(&nfs_client_lock); | |
1001 | ||
1002 | server->mount_time = jiffies; | |
1003 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1004 | return server; | |
1005 | ||
1006 | error: | |
1007 | nfs_free_server(server); | |
1008 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1009 | return ERR_PTR(error); | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * Create an NFS4 referral server record | |
1014 | */ | |
1015 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1016 | struct nfs_fh *mntfh) |
54ceac45 DH |
1017 | { |
1018 | struct nfs_client *parent_client; | |
1019 | struct nfs_server *server, *parent_server; | |
1020 | struct nfs_fattr fattr; | |
1021 | int error; | |
1022 | ||
1023 | dprintk("--> nfs4_create_referral_server()\n"); | |
1024 | ||
1025 | server = nfs_alloc_server(); | |
1026 | if (!server) | |
1027 | return ERR_PTR(-ENOMEM); | |
1028 | ||
1029 | parent_server = NFS_SB(data->sb); | |
1030 | parent_client = parent_server->nfs_client; | |
1031 | ||
1032 | /* Get a client representation. | |
1033 | * Note: NFSv4 always uses TCP, */ | |
1034 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1035 | parent_client->cl_ipaddr, |
54ceac45 DH |
1036 | data->authflavor, |
1037 | parent_server->client->cl_xprt->prot, | |
1038 | parent_client->retrans_timeo, | |
1039 | parent_client->retrans_count); | |
297de4f6 AA |
1040 | if (error < 0) |
1041 | goto error; | |
54ceac45 DH |
1042 | |
1043 | /* Initialise the client representation from the parent server */ | |
1044 | nfs_server_copy_userdata(server, parent_server); | |
1045 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1046 | ||
1047 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1048 | if (error < 0) | |
1049 | goto error; | |
1050 | ||
1051 | BUG_ON(!server->nfs_client); | |
1052 | BUG_ON(!server->nfs_client->rpc_ops); | |
1053 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1054 | ||
f2d0d85e TM |
1055 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1056 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1057 | if (error < 0) | |
1058 | goto error; | |
1059 | ||
54ceac45 | 1060 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1061 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1062 | if (error < 0) |
1063 | goto error; | |
1064 | ||
54af3bb5 TM |
1065 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1066 | server->namelen = NFS4_MAXNAMLEN; | |
1067 | ||
54ceac45 | 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 | ||
54af3bb5 TM |
1127 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1128 | server->namelen = NFS4_MAXNAMLEN; | |
1129 | ||
54ceac45 | 1130 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1131 | (unsigned long long) server->fsid.major, |
1132 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1133 | |
1134 | error = nfs_start_lockd(server); | |
1135 | if (error < 0) | |
1136 | goto out_free_server; | |
1137 | ||
1138 | spin_lock(&nfs_client_lock); | |
1139 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1140 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1141 | spin_unlock(&nfs_client_lock); | |
1142 | ||
1143 | server->mount_time = jiffies; | |
1144 | ||
1145 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1146 | return server; | |
1147 | ||
1148 | out_free_server: | |
1149 | nfs_free_server(server); | |
1150 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1151 | return ERR_PTR(error); | |
1152 | } | |
6aaca566 DH |
1153 | |
1154 | #ifdef CONFIG_PROC_FS | |
1155 | static struct proc_dir_entry *proc_fs_nfs; | |
1156 | ||
1157 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1158 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1159 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1160 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1161 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1162 | ||
1163 | static struct seq_operations nfs_server_list_ops = { | |
1164 | .start = nfs_server_list_start, | |
1165 | .next = nfs_server_list_next, | |
1166 | .stop = nfs_server_list_stop, | |
1167 | .show = nfs_server_list_show, | |
1168 | }; | |
1169 | ||
00977a59 | 1170 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1171 | .open = nfs_server_list_open, |
1172 | .read = seq_read, | |
1173 | .llseek = seq_lseek, | |
1174 | .release = seq_release, | |
1175 | }; | |
1176 | ||
1177 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1178 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1179 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1180 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1181 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1182 | ||
1183 | static struct seq_operations nfs_volume_list_ops = { | |
1184 | .start = nfs_volume_list_start, | |
1185 | .next = nfs_volume_list_next, | |
1186 | .stop = nfs_volume_list_stop, | |
1187 | .show = nfs_volume_list_show, | |
1188 | }; | |
1189 | ||
00977a59 | 1190 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1191 | .open = nfs_volume_list_open, |
1192 | .read = seq_read, | |
1193 | .llseek = seq_lseek, | |
1194 | .release = seq_release, | |
1195 | }; | |
1196 | ||
1197 | /* | |
1198 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1199 | * we're dealing | |
1200 | */ | |
1201 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1202 | { | |
1203 | struct seq_file *m; | |
1204 | int ret; | |
1205 | ||
1206 | ret = seq_open(file, &nfs_server_list_ops); | |
1207 | if (ret < 0) | |
1208 | return ret; | |
1209 | ||
1210 | m = file->private_data; | |
1211 | m->private = PDE(inode)->data; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * set up the iterator to start reading from the server list and return the first item | |
1218 | */ | |
1219 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1220 | { | |
6aaca566 DH |
1221 | /* lock the list against modification */ |
1222 | spin_lock(&nfs_client_lock); | |
259902ea | 1223 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1224 | } |
1225 | ||
1226 | /* | |
1227 | * move to next server | |
1228 | */ | |
1229 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1230 | { | |
259902ea | 1231 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1232 | } |
1233 | ||
1234 | /* | |
1235 | * clean up after reading from the transports list | |
1236 | */ | |
1237 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1238 | { | |
1239 | spin_unlock(&nfs_client_lock); | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * display a header line followed by a load of call lines | |
1244 | */ | |
1245 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1246 | { | |
1247 | struct nfs_client *clp; | |
1248 | ||
1249 | /* display header on line 1 */ | |
259902ea | 1250 | if (v == &nfs_client_list) { |
6aaca566 DH |
1251 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | /* display one transport per line on subsequent lines */ | |
1256 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1257 | ||
1258 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1259 | clp->cl_nfsversion, | |
1260 | NIPQUAD(clp->cl_addr.sin_addr), | |
1261 | ntohs(clp->cl_addr.sin_port), | |
1262 | atomic_read(&clp->cl_count), | |
1263 | clp->cl_hostname); | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | /* | |
1269 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1270 | */ | |
1271 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1272 | { | |
1273 | struct seq_file *m; | |
1274 | int ret; | |
1275 | ||
1276 | ret = seq_open(file, &nfs_volume_list_ops); | |
1277 | if (ret < 0) | |
1278 | return ret; | |
1279 | ||
1280 | m = file->private_data; | |
1281 | m->private = PDE(inode)->data; | |
1282 | ||
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * set up the iterator to start reading from the volume list and return the first item | |
1288 | */ | |
1289 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1290 | { | |
6aaca566 DH |
1291 | /* lock the list against modification */ |
1292 | spin_lock(&nfs_client_lock); | |
259902ea | 1293 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1294 | } |
1295 | ||
1296 | /* | |
1297 | * move to next volume | |
1298 | */ | |
1299 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1300 | { | |
259902ea | 1301 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1302 | } |
1303 | ||
1304 | /* | |
1305 | * clean up after reading from the transports list | |
1306 | */ | |
1307 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1308 | { | |
1309 | spin_unlock(&nfs_client_lock); | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * display a header line followed by a load of call lines | |
1314 | */ | |
1315 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1316 | { | |
1317 | struct nfs_server *server; | |
1318 | struct nfs_client *clp; | |
1319 | char dev[8], fsid[17]; | |
1320 | ||
1321 | /* display header on line 1 */ | |
259902ea | 1322 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1323 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1324 | return 0; | |
1325 | } | |
1326 | /* display one transport per line on subsequent lines */ | |
1327 | server = list_entry(v, struct nfs_server, master_link); | |
1328 | clp = server->nfs_client; | |
1329 | ||
1330 | snprintf(dev, 8, "%u:%u", | |
1331 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1332 | ||
1333 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1334 | (unsigned long long) server->fsid.major, |
1335 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1336 | |
1337 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1338 | clp->cl_nfsversion, | |
1339 | NIPQUAD(clp->cl_addr.sin_addr), | |
1340 | ntohs(clp->cl_addr.sin_port), | |
1341 | dev, | |
1342 | fsid); | |
1343 | ||
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * initialise the /proc/fs/nfsfs/ directory | |
1349 | */ | |
1350 | int __init nfs_fs_proc_init(void) | |
1351 | { | |
1352 | struct proc_dir_entry *p; | |
1353 | ||
1354 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1355 | if (!proc_fs_nfs) | |
1356 | goto error_0; | |
1357 | ||
1358 | proc_fs_nfs->owner = THIS_MODULE; | |
1359 | ||
1360 | /* a file of servers with which we're dealing */ | |
1361 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1362 | if (!p) | |
1363 | goto error_1; | |
1364 | ||
1365 | p->proc_fops = &nfs_server_list_fops; | |
1366 | p->owner = THIS_MODULE; | |
1367 | ||
1368 | /* a file of volumes that we have mounted */ | |
1369 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1370 | if (!p) | |
1371 | goto error_2; | |
1372 | ||
1373 | p->proc_fops = &nfs_volume_list_fops; | |
1374 | p->owner = THIS_MODULE; | |
1375 | return 0; | |
1376 | ||
1377 | error_2: | |
1378 | remove_proc_entry("servers", proc_fs_nfs); | |
1379 | error_1: | |
1380 | remove_proc_entry("nfsfs", proc_root_fs); | |
1381 | error_0: | |
1382 | return -ENOMEM; | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | * clean up the /proc/fs/nfsfs/ directory | |
1387 | */ | |
1388 | void nfs_fs_proc_exit(void) | |
1389 | { | |
1390 | remove_proc_entry("volumes", proc_fs_nfs); | |
1391 | remove_proc_entry("servers", proc_fs_nfs); | |
1392 | remove_proc_entry("nfsfs", proc_root_fs); | |
1393 | } | |
1394 | ||
1395 | #endif /* CONFIG_PROC_FS */ |