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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> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
37 | #include <linux/nfs_xdr.h> | |
38 | ||
39 | #include <asm/system.h> | |
40 | ||
41 | #include "nfs4_fs.h" | |
42 | #include "callback.h" | |
43 | #include "delegation.h" | |
44 | #include "iostat.h" | |
45 | #include "internal.h" | |
46 | ||
47 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
48 | ||
49 | static DEFINE_SPINLOCK(nfs_client_lock); | |
50 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 51 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
52 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
53 | ||
5006a76c DH |
54 | /* |
55 | * RPC cruft for NFS | |
56 | */ | |
57 | static struct rpc_version *nfs_version[5] = { | |
58 | [2] = &nfs_version2, | |
59 | #ifdef CONFIG_NFS_V3 | |
60 | [3] = &nfs_version3, | |
61 | #endif | |
62 | #ifdef CONFIG_NFS_V4 | |
63 | [4] = &nfs_version4, | |
64 | #endif | |
65 | }; | |
66 | ||
67 | struct rpc_program nfs_program = { | |
68 | .name = "nfs", | |
69 | .number = NFS_PROGRAM, | |
70 | .nrvers = ARRAY_SIZE(nfs_version), | |
71 | .version = nfs_version, | |
72 | .stats = &nfs_rpcstat, | |
73 | .pipe_dir_name = "/nfs", | |
74 | }; | |
75 | ||
76 | struct rpc_stat nfs_rpcstat = { | |
77 | .program = &nfs_program | |
78 | }; | |
79 | ||
80 | ||
81 | #ifdef CONFIG_NFS_V3_ACL | |
82 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
83 | static struct rpc_version * nfsacl_version[] = { | |
84 | [3] = &nfsacl_version3, | |
85 | }; | |
86 | ||
87 | struct rpc_program nfsacl_program = { | |
88 | .name = "nfsacl", | |
89 | .number = NFS_ACL_PROGRAM, | |
90 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
91 | .version = nfsacl_version, | |
92 | .stats = &nfsacl_rpcstat, | |
93 | }; | |
94 | #endif /* CONFIG_NFS_V3_ACL */ | |
95 | ||
3a498026 TM |
96 | struct nfs_client_initdata { |
97 | const char *hostname; | |
98 | const struct sockaddr_in *addr; | |
99 | int version; | |
100 | }; | |
101 | ||
24c8dbbb DH |
102 | /* |
103 | * Allocate a shared client record | |
104 | * | |
105 | * Since these are allocated/deallocated very rarely, we don't | |
106 | * bother putting them in a slab cache... | |
107 | */ | |
3a498026 | 108 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
109 | { |
110 | struct nfs_client *clp; | |
24c8dbbb DH |
111 | |
112 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
113 | goto error_0; | |
114 | ||
3a498026 | 115 | if (cl_init->version == 4) { |
24c8dbbb DH |
116 | if (nfs_callback_up() < 0) |
117 | goto error_2; | |
118 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
119 | } | |
120 | ||
121 | atomic_set(&clp->cl_count, 1); | |
122 | clp->cl_cons_state = NFS_CS_INITING; | |
123 | ||
3a498026 TM |
124 | clp->cl_nfsversion = cl_init->version; |
125 | memcpy(&clp->cl_addr, cl_init->addr, sizeof(clp->cl_addr)); | |
24c8dbbb | 126 | |
3a498026 TM |
127 | if (cl_init->hostname) { |
128 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
129 | if (!clp->cl_hostname) |
130 | goto error_3; | |
131 | } | |
132 | ||
133 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
134 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
135 | ||
136 | #ifdef CONFIG_NFS_V4 | |
137 | init_rwsem(&clp->cl_sem); | |
138 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 139 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 140 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
141 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
142 | clp->cl_boot_time = CURRENT_TIME; | |
143 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
144 | #endif | |
145 | ||
146 | return clp; | |
147 | ||
148 | error_3: | |
9c5bf38d TM |
149 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
150 | nfs_callback_down(); | |
24c8dbbb | 151 | error_2: |
24c8dbbb DH |
152 | kfree(clp); |
153 | error_0: | |
154 | return NULL; | |
155 | } | |
156 | ||
5dd3177a TM |
157 | static void nfs4_shutdown_client(struct nfs_client *clp) |
158 | { | |
159 | #ifdef CONFIG_NFS_V4 | |
160 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
161 | nfs4_kill_renewd(clp); | |
9f958ab8 | 162 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
163 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
164 | nfs_idmap_delete(clp); | |
165 | #endif | |
166 | } | |
167 | ||
24c8dbbb DH |
168 | /* |
169 | * Destroy a shared client record | |
170 | */ | |
171 | static void nfs_free_client(struct nfs_client *clp) | |
172 | { | |
173 | dprintk("--> nfs_free_client(%d)\n", clp->cl_nfsversion); | |
174 | ||
5dd3177a | 175 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
176 | |
177 | /* -EIO all pending I/O */ | |
178 | if (!IS_ERR(clp->cl_rpcclient)) | |
179 | rpc_shutdown_client(clp->cl_rpcclient); | |
180 | ||
181 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
182 | nfs_callback_down(); | |
183 | ||
24c8dbbb DH |
184 | kfree(clp->cl_hostname); |
185 | kfree(clp); | |
186 | ||
187 | dprintk("<-- nfs_free_client()\n"); | |
188 | } | |
189 | ||
190 | /* | |
191 | * Release a reference to a shared client record | |
192 | */ | |
193 | void nfs_put_client(struct nfs_client *clp) | |
194 | { | |
27ba8512 DH |
195 | if (!clp) |
196 | return; | |
197 | ||
24c8dbbb DH |
198 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
199 | ||
200 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
201 | list_del(&clp->cl_share_link); | |
202 | spin_unlock(&nfs_client_lock); | |
203 | ||
204 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
205 | ||
206 | nfs_free_client(clp); | |
207 | } | |
208 | } | |
209 | ||
210 | /* | |
211 | * Find a client by address | |
212 | * - caller must hold nfs_client_lock | |
213 | */ | |
13bbc06a | 214 | static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion, int match_port) |
24c8dbbb DH |
215 | { |
216 | struct nfs_client *clp; | |
217 | ||
218 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
13bbc06a TM |
219 | /* Don't match clients that failed to initialise properly */ |
220 | if (clp->cl_cons_state < 0) | |
221 | continue; | |
222 | ||
24c8dbbb DH |
223 | /* Different NFS versions cannot share the same nfs_client */ |
224 | if (clp->cl_nfsversion != nfsversion) | |
225 | continue; | |
226 | ||
d45273ed | 227 | if (clp->cl_addr.sin_addr.s_addr != addr->sin_addr.s_addr) |
24c8dbbb DH |
228 | continue; |
229 | ||
13bbc06a | 230 | if (!match_port || clp->cl_addr.sin_port == addr->sin_port) |
24c8dbbb DH |
231 | goto found; |
232 | } | |
233 | ||
234 | return NULL; | |
235 | ||
236 | found: | |
237 | atomic_inc(&clp->cl_count); | |
238 | return clp; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Find a client by IP address and protocol version | |
243 | * - returns NULL if no such client | |
244 | */ | |
245 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) | |
246 | { | |
247 | struct nfs_client *clp; | |
248 | ||
249 | spin_lock(&nfs_client_lock); | |
13bbc06a | 250 | clp = __nfs_find_client(addr, nfsversion, 0); |
24c8dbbb | 251 | spin_unlock(&nfs_client_lock); |
13bbc06a TM |
252 | if (clp != NULL && clp->cl_cons_state != NFS_CS_READY) { |
253 | nfs_put_client(clp); | |
254 | clp = NULL; | |
255 | } | |
24c8dbbb DH |
256 | return clp; |
257 | } | |
258 | ||
259 | /* | |
260 | * Look up a client by IP address and protocol version | |
261 | * - creates a new record if one doesn't yet exist | |
262 | */ | |
3a498026 | 263 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
264 | { |
265 | struct nfs_client *clp, *new = NULL; | |
266 | int error; | |
267 | ||
268 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n", | |
3a498026 TM |
269 | cl_init->hostname ?: "", NIPQUAD(cl_init->addr->sin_addr), |
270 | cl_init->addr->sin_port, cl_init->version); | |
24c8dbbb DH |
271 | |
272 | /* see if the client already exists */ | |
273 | do { | |
274 | spin_lock(&nfs_client_lock); | |
275 | ||
3a498026 | 276 | clp = __nfs_find_client(cl_init->addr, cl_init->version, 1); |
24c8dbbb DH |
277 | if (clp) |
278 | goto found_client; | |
279 | if (new) | |
280 | goto install_client; | |
281 | ||
282 | spin_unlock(&nfs_client_lock); | |
283 | ||
3a498026 | 284 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
285 | } while (new); |
286 | ||
287 | return ERR_PTR(-ENOMEM); | |
288 | ||
289 | /* install a new client and return with it unready */ | |
290 | install_client: | |
291 | clp = new; | |
292 | list_add(&clp->cl_share_link, &nfs_client_list); | |
293 | spin_unlock(&nfs_client_lock); | |
294 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
295 | return clp; | |
296 | ||
297 | /* found an existing client | |
298 | * - make sure it's ready before returning | |
299 | */ | |
300 | found_client: | |
301 | spin_unlock(&nfs_client_lock); | |
302 | ||
303 | if (new) | |
304 | nfs_free_client(new); | |
305 | ||
83250493 | 306 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
307 | clp->cl_cons_state != NFS_CS_INITING); |
308 | if (error < 0) { | |
309 | nfs_put_client(clp); | |
310 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
311 | } |
312 | ||
313 | if (clp->cl_cons_state < NFS_CS_READY) { | |
314 | error = clp->cl_cons_state; | |
315 | nfs_put_client(clp); | |
316 | return ERR_PTR(error); | |
317 | } | |
318 | ||
54ceac45 DH |
319 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
320 | ||
24c8dbbb DH |
321 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
322 | return clp; | |
323 | } | |
324 | ||
325 | /* | |
326 | * Mark a server as ready or failed | |
327 | */ | |
54ceac45 | 328 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
329 | { |
330 | clp->cl_cons_state = state; | |
331 | wake_up_all(&nfs_client_active_wq); | |
332 | } | |
5006a76c DH |
333 | |
334 | /* | |
335 | * Initialise the timeout values for a connection | |
336 | */ | |
337 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
338 | unsigned int timeo, unsigned int retrans) | |
339 | { | |
340 | to->to_initval = timeo * HZ / 10; | |
341 | to->to_retries = retrans; | |
342 | if (!to->to_retries) | |
343 | to->to_retries = 2; | |
344 | ||
345 | switch (proto) { | |
0896a725 | 346 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 347 | case XPRT_TRANSPORT_RDMA: |
5006a76c DH |
348 | if (!to->to_initval) |
349 | to->to_initval = 60 * HZ; | |
350 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
351 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
352 | to->to_increment = to->to_initval; | |
353 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
354 | to->to_exponential = 0; | |
355 | break; | |
0896a725 | 356 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
357 | default: |
358 | if (!to->to_initval) | |
359 | to->to_initval = 11 * HZ / 10; | |
360 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
361 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
362 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
363 | to->to_exponential = 1; | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | /* | |
369 | * Create an RPC client handle | |
370 | */ | |
54ceac45 DH |
371 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
372 | unsigned int timeo, | |
373 | unsigned int retrans, | |
43d78ef2 CL |
374 | rpc_authflavor_t flavor, |
375 | int flags) | |
5006a76c DH |
376 | { |
377 | struct rpc_timeout timeparms; | |
5006a76c | 378 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
379 | struct rpc_create_args args = { |
380 | .protocol = proto, | |
381 | .address = (struct sockaddr *)&clp->cl_addr, | |
382 | .addrsize = sizeof(clp->cl_addr), | |
383 | .timeout = &timeparms, | |
384 | .servername = clp->cl_hostname, | |
385 | .program = &nfs_program, | |
386 | .version = clp->rpc_ops->version, | |
387 | .authflavor = flavor, | |
43d78ef2 | 388 | .flags = flags, |
41877d20 | 389 | }; |
5006a76c DH |
390 | |
391 | if (!IS_ERR(clp->cl_rpcclient)) | |
392 | return 0; | |
393 | ||
394 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
395 | clp->retrans_timeo = timeparms.to_initval; | |
396 | clp->retrans_count = timeparms.to_retries; | |
397 | ||
41877d20 | 398 | clnt = rpc_create(&args); |
5006a76c DH |
399 | if (IS_ERR(clnt)) { |
400 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
401 | __FUNCTION__, PTR_ERR(clnt)); | |
402 | return PTR_ERR(clnt); | |
403 | } | |
404 | ||
5006a76c DH |
405 | clp->cl_rpcclient = clnt; |
406 | return 0; | |
407 | } | |
54ceac45 DH |
408 | |
409 | /* | |
410 | * Version 2 or 3 client destruction | |
411 | */ | |
412 | static void nfs_destroy_server(struct nfs_server *server) | |
413 | { | |
54ceac45 DH |
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 | 544 | { |
3a498026 TM |
545 | struct nfs_client_initdata cl_init = { |
546 | .hostname = data->nfs_server.hostname, | |
547 | .addr = &data->nfs_server.address, | |
548 | .version = 2, | |
549 | }; | |
54ceac45 | 550 | struct nfs_client *clp; |
3a498026 | 551 | int error; |
54ceac45 DH |
552 | |
553 | dprintk("--> nfs_init_server()\n"); | |
554 | ||
555 | #ifdef CONFIG_NFS_V3 | |
556 | if (data->flags & NFS_MOUNT_VER3) | |
3a498026 | 557 | cl_init.version = 3; |
54ceac45 DH |
558 | #endif |
559 | ||
560 | /* Allocate or find a client reference we can use */ | |
3a498026 | 561 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
562 | if (IS_ERR(clp)) { |
563 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
564 | return PTR_ERR(clp); | |
565 | } | |
566 | ||
567 | error = nfs_init_client(clp, data); | |
568 | if (error < 0) | |
569 | goto error; | |
570 | ||
571 | server->nfs_client = clp; | |
572 | ||
573 | /* Initialise the client representation from the mount data */ | |
574 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
575 | ||
576 | if (data->rsize) | |
577 | server->rsize = nfs_block_size(data->rsize, NULL); | |
578 | if (data->wsize) | |
579 | server->wsize = nfs_block_size(data->wsize, NULL); | |
580 | ||
581 | server->acregmin = data->acregmin * HZ; | |
582 | server->acregmax = data->acregmax * HZ; | |
583 | server->acdirmin = data->acdirmin * HZ; | |
584 | server->acdirmax = data->acdirmax * HZ; | |
585 | ||
586 | /* Start lockd here, before we might error out */ | |
587 | error = nfs_start_lockd(server); | |
588 | if (error < 0) | |
589 | goto error; | |
590 | ||
2283f8d6 | 591 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
592 | if (error < 0) |
593 | goto error; | |
594 | ||
595 | server->namelen = data->namlen; | |
596 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
597 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
598 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
599 | return 0; | |
600 | ||
601 | error: | |
602 | server->nfs_client = NULL; | |
603 | nfs_put_client(clp); | |
604 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
605 | return error; | |
606 | } | |
607 | ||
608 | /* | |
609 | * Load up the server record from information gained in an fsinfo record | |
610 | */ | |
611 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
612 | { | |
613 | unsigned long max_rpc_payload; | |
614 | ||
615 | /* Work out a lot of parameters */ | |
616 | if (server->rsize == 0) | |
617 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
618 | if (server->wsize == 0) | |
619 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
620 | ||
621 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
622 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
623 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
624 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
625 | ||
626 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
627 | if (server->rsize > max_rpc_payload) | |
628 | server->rsize = max_rpc_payload; | |
629 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
630 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
631 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 632 | |
54ceac45 DH |
633 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
634 | ||
635 | if (server->wsize > max_rpc_payload) | |
636 | server->wsize = max_rpc_payload; | |
637 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
638 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
639 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
640 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
641 | ||
642 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
643 | if (server->dtsize > PAGE_CACHE_SIZE) | |
644 | server->dtsize = PAGE_CACHE_SIZE; | |
645 | if (server->dtsize > server->rsize) | |
646 | server->dtsize = server->rsize; | |
647 | ||
648 | if (server->flags & NFS_MOUNT_NOAC) { | |
649 | server->acregmin = server->acregmax = 0; | |
650 | server->acdirmin = server->acdirmax = 0; | |
651 | } | |
652 | ||
653 | server->maxfilesize = fsinfo->maxfilesize; | |
654 | ||
655 | /* We're airborne Set socket buffersize */ | |
656 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
657 | } | |
658 | ||
659 | /* | |
660 | * Probe filesystem information, including the FSID on v2/v3 | |
661 | */ | |
662 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
663 | { | |
664 | struct nfs_fsinfo fsinfo; | |
665 | struct nfs_client *clp = server->nfs_client; | |
666 | int error; | |
667 | ||
668 | dprintk("--> nfs_probe_fsinfo()\n"); | |
669 | ||
670 | if (clp->rpc_ops->set_capabilities != NULL) { | |
671 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
672 | if (error < 0) | |
673 | goto out_error; | |
674 | } | |
675 | ||
676 | fsinfo.fattr = fattr; | |
677 | nfs_fattr_init(fattr); | |
678 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
679 | if (error < 0) | |
680 | goto out_error; | |
681 | ||
682 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
683 | error = bdi_init(&server->backing_dev_info); |
684 | if (error) | |
685 | goto out_error; | |
686 | ||
54ceac45 DH |
687 | |
688 | /* Get some general file system info */ | |
689 | if (server->namelen == 0) { | |
690 | struct nfs_pathconf pathinfo; | |
691 | ||
692 | pathinfo.fattr = fattr; | |
693 | nfs_fattr_init(fattr); | |
694 | ||
695 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
696 | server->namelen = pathinfo.max_namelen; | |
697 | } | |
698 | ||
699 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
700 | return 0; | |
701 | ||
702 | out_error: | |
703 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
704 | return error; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Copy useful information when duplicating a server record | |
709 | */ | |
710 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
711 | { | |
712 | target->flags = source->flags; | |
713 | target->acregmin = source->acregmin; | |
714 | target->acregmax = source->acregmax; | |
715 | target->acdirmin = source->acdirmin; | |
716 | target->acdirmax = source->acdirmax; | |
717 | target->caps = source->caps; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Allocate and initialise a server record | |
722 | */ | |
723 | static struct nfs_server *nfs_alloc_server(void) | |
724 | { | |
725 | struct nfs_server *server; | |
726 | ||
727 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
728 | if (!server) | |
729 | return NULL; | |
730 | ||
731 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
732 | ||
733 | /* Zero out the NFS state stuff */ | |
734 | INIT_LIST_HEAD(&server->client_link); | |
735 | INIT_LIST_HEAD(&server->master_link); | |
736 | ||
ef818a28 SD |
737 | init_waitqueue_head(&server->active_wq); |
738 | atomic_set(&server->active, 0); | |
739 | ||
54ceac45 DH |
740 | server->io_stats = nfs_alloc_iostats(); |
741 | if (!server->io_stats) { | |
742 | kfree(server); | |
743 | return NULL; | |
744 | } | |
745 | ||
746 | return server; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Free up a server record | |
751 | */ | |
752 | void nfs_free_server(struct nfs_server *server) | |
753 | { | |
754 | dprintk("--> nfs_free_server()\n"); | |
755 | ||
756 | spin_lock(&nfs_client_lock); | |
757 | list_del(&server->client_link); | |
758 | list_del(&server->master_link); | |
759 | spin_unlock(&nfs_client_lock); | |
760 | ||
761 | if (server->destroy != NULL) | |
762 | server->destroy(server); | |
5cef338b TM |
763 | |
764 | if (!IS_ERR(server->client_acl)) | |
765 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
766 | if (!IS_ERR(server->client)) |
767 | rpc_shutdown_client(server->client); | |
768 | ||
769 | nfs_put_client(server->nfs_client); | |
770 | ||
771 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 772 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
773 | kfree(server); |
774 | nfs_release_automount_timer(); | |
775 | dprintk("<-- nfs_free_server()\n"); | |
776 | } | |
777 | ||
778 | /* | |
779 | * Create a version 2 or 3 volume record | |
780 | * - keyed on server and FSID | |
781 | */ | |
2283f8d6 | 782 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
783 | struct nfs_fh *mntfh) |
784 | { | |
785 | struct nfs_server *server; | |
786 | struct nfs_fattr fattr; | |
787 | int error; | |
788 | ||
789 | server = nfs_alloc_server(); | |
790 | if (!server) | |
791 | return ERR_PTR(-ENOMEM); | |
792 | ||
793 | /* Get a client representation */ | |
794 | error = nfs_init_server(server, data); | |
795 | if (error < 0) | |
796 | goto error; | |
797 | ||
798 | BUG_ON(!server->nfs_client); | |
799 | BUG_ON(!server->nfs_client->rpc_ops); | |
800 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
801 | ||
802 | /* Probe the root fh to retrieve its FSID */ | |
803 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
804 | if (error < 0) | |
805 | goto error; | |
54af3bb5 TM |
806 | if (server->nfs_client->rpc_ops->version == 3) { |
807 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
808 | server->namelen = NFS3_MAXNAMLEN; | |
809 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
810 | server->caps |= NFS_CAP_READDIRPLUS; | |
811 | } else { | |
812 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
813 | server->namelen = NFS2_MAXNAMLEN; | |
814 | } | |
815 | ||
54ceac45 DH |
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, | |
7d9ac06f | 852 | const char *ip_addr, |
54ceac45 DH |
853 | rpc_authflavor_t authflavour) |
854 | { | |
855 | int error; | |
856 | ||
857 | if (clp->cl_cons_state == NFS_CS_READY) { | |
858 | /* the client is initialised already */ | |
859 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
860 | return 0; | |
861 | } | |
862 | ||
863 | /* Check NFS protocol revision and initialize RPC op vector */ | |
864 | clp->rpc_ops = &nfs_v4_clientops; | |
865 | ||
43d78ef2 CL |
866 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
867 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
868 | if (error < 0) |
869 | goto error; | |
7d9ac06f | 870 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
871 | |
872 | error = nfs_idmap_new(clp); | |
873 | if (error < 0) { | |
874 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
875 | __FUNCTION__, error); | |
54ceac45 DH |
876 | goto error; |
877 | } | |
9c5bf38d | 878 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
879 | |
880 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
881 | return 0; | |
882 | ||
883 | error: | |
884 | nfs_mark_client_ready(clp, error); | |
885 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
886 | return error; | |
887 | } | |
888 | ||
889 | /* | |
890 | * Set up an NFS4 client | |
891 | */ | |
892 | static int nfs4_set_client(struct nfs_server *server, | |
893 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 894 | const char *ip_addr, |
54ceac45 DH |
895 | rpc_authflavor_t authflavour, |
896 | int proto, int timeo, int retrans) | |
897 | { | |
3a498026 TM |
898 | struct nfs_client_initdata cl_init = { |
899 | .hostname = hostname, | |
900 | .addr = addr, | |
901 | .version = 4, | |
902 | }; | |
54ceac45 DH |
903 | struct nfs_client *clp; |
904 | int error; | |
905 | ||
906 | dprintk("--> nfs4_set_client()\n"); | |
907 | ||
908 | /* Allocate or find a client reference we can use */ | |
3a498026 | 909 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
910 | if (IS_ERR(clp)) { |
911 | error = PTR_ERR(clp); | |
912 | goto error; | |
913 | } | |
7d9ac06f | 914 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
915 | if (error < 0) |
916 | goto error_put; | |
917 | ||
918 | server->nfs_client = clp; | |
919 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
920 | return 0; | |
921 | ||
922 | error_put: | |
923 | nfs_put_client(clp); | |
924 | error: | |
925 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
926 | return error; | |
927 | } | |
928 | ||
929 | /* | |
930 | * Create a version 4 volume record | |
931 | */ | |
932 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 933 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
934 | { |
935 | int error; | |
936 | ||
937 | dprintk("--> nfs4_init_server()\n"); | |
938 | ||
939 | /* Initialise the client representation from the mount data */ | |
940 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
941 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
942 | ||
943 | if (data->rsize) | |
944 | server->rsize = nfs_block_size(data->rsize, NULL); | |
945 | if (data->wsize) | |
946 | server->wsize = nfs_block_size(data->wsize, NULL); | |
947 | ||
948 | server->acregmin = data->acregmin * HZ; | |
949 | server->acregmax = data->acregmax * HZ; | |
950 | server->acdirmin = data->acdirmin * HZ; | |
951 | server->acdirmax = data->acdirmax * HZ; | |
952 | ||
91ea40b9 | 953 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
954 | |
955 | /* Done */ | |
956 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
957 | return error; | |
958 | } | |
959 | ||
960 | /* | |
961 | * Create a version 4 volume record | |
962 | * - keyed on server and FSID | |
963 | */ | |
91ea40b9 | 964 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
965 | struct nfs_fh *mntfh) |
966 | { | |
967 | struct nfs_fattr fattr; | |
968 | struct nfs_server *server; | |
969 | int error; | |
970 | ||
971 | dprintk("--> nfs4_create_server()\n"); | |
972 | ||
973 | server = nfs_alloc_server(); | |
974 | if (!server) | |
975 | return ERR_PTR(-ENOMEM); | |
976 | ||
977 | /* Get a client record */ | |
91ea40b9 TT |
978 | error = nfs4_set_client(server, |
979 | data->nfs_server.hostname, | |
980 | &data->nfs_server.address, | |
981 | data->client_address, | |
982 | data->auth_flavors[0], | |
983 | data->nfs_server.protocol, | |
984 | data->timeo, data->retrans); | |
54ceac45 DH |
985 | if (error < 0) |
986 | goto error; | |
987 | ||
988 | /* set up the general RPC client */ | |
91ea40b9 | 989 | error = nfs4_init_server(server, data); |
54ceac45 DH |
990 | if (error < 0) |
991 | goto error; | |
992 | ||
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 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 998 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
999 | if (error < 0) |
1000 | goto error; | |
1001 | ||
6daabf1b DH |
1002 | dprintk("Server FSID: %llx:%llx\n", |
1003 | (unsigned long long) server->fsid.major, | |
1004 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1005 | dprintk("Mount FH: %d\n", mntfh->size); |
1006 | ||
1007 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1008 | if (error < 0) | |
1009 | goto error; | |
1010 | ||
54af3bb5 TM |
1011 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1012 | server->namelen = NFS4_MAXNAMLEN; | |
1013 | ||
54ceac45 DH |
1014 | BUG_ON(!server->nfs_client); |
1015 | BUG_ON(!server->nfs_client->rpc_ops); | |
1016 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1017 | ||
1018 | spin_lock(&nfs_client_lock); | |
1019 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1020 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1021 | spin_unlock(&nfs_client_lock); | |
1022 | ||
1023 | server->mount_time = jiffies; | |
1024 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1025 | return server; | |
1026 | ||
1027 | error: | |
1028 | nfs_free_server(server); | |
1029 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1030 | return ERR_PTR(error); | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Create an NFS4 referral server record | |
1035 | */ | |
1036 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1037 | struct nfs_fh *mntfh) |
54ceac45 DH |
1038 | { |
1039 | struct nfs_client *parent_client; | |
1040 | struct nfs_server *server, *parent_server; | |
1041 | struct nfs_fattr fattr; | |
1042 | int error; | |
1043 | ||
1044 | dprintk("--> nfs4_create_referral_server()\n"); | |
1045 | ||
1046 | server = nfs_alloc_server(); | |
1047 | if (!server) | |
1048 | return ERR_PTR(-ENOMEM); | |
1049 | ||
1050 | parent_server = NFS_SB(data->sb); | |
1051 | parent_client = parent_server->nfs_client; | |
1052 | ||
1053 | /* Get a client representation. | |
1054 | * Note: NFSv4 always uses TCP, */ | |
1055 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1056 | parent_client->cl_ipaddr, |
54ceac45 DH |
1057 | data->authflavor, |
1058 | parent_server->client->cl_xprt->prot, | |
1059 | parent_client->retrans_timeo, | |
1060 | parent_client->retrans_count); | |
297de4f6 AA |
1061 | if (error < 0) |
1062 | goto error; | |
54ceac45 DH |
1063 | |
1064 | /* Initialise the client representation from the parent server */ | |
1065 | nfs_server_copy_userdata(server, parent_server); | |
1066 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1067 | ||
1068 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1069 | if (error < 0) | |
1070 | goto error; | |
1071 | ||
1072 | BUG_ON(!server->nfs_client); | |
1073 | BUG_ON(!server->nfs_client->rpc_ops); | |
1074 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1075 | ||
f2d0d85e TM |
1076 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1077 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1078 | if (error < 0) | |
1079 | goto error; | |
1080 | ||
54ceac45 | 1081 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1082 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1083 | if (error < 0) |
1084 | goto error; | |
1085 | ||
54af3bb5 TM |
1086 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1087 | server->namelen = NFS4_MAXNAMLEN; | |
1088 | ||
54ceac45 | 1089 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1090 | (unsigned long long) server->fsid.major, |
1091 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1092 | |
1093 | spin_lock(&nfs_client_lock); | |
1094 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1095 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1096 | spin_unlock(&nfs_client_lock); | |
1097 | ||
1098 | server->mount_time = jiffies; | |
1099 | ||
1100 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1101 | return server; | |
1102 | ||
1103 | error: | |
1104 | nfs_free_server(server); | |
1105 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1106 | return ERR_PTR(error); | |
1107 | } | |
1108 | ||
1109 | #endif /* CONFIG_NFS_V4 */ | |
1110 | ||
1111 | /* | |
1112 | * Clone an NFS2, NFS3 or NFS4 server record | |
1113 | */ | |
1114 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1115 | struct nfs_fh *fh, | |
1116 | struct nfs_fattr *fattr) | |
1117 | { | |
1118 | struct nfs_server *server; | |
1119 | struct nfs_fattr fattr_fsinfo; | |
1120 | int error; | |
1121 | ||
1122 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1123 | (unsigned long long) fattr->fsid.major, |
1124 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1125 | |
1126 | server = nfs_alloc_server(); | |
1127 | if (!server) | |
1128 | return ERR_PTR(-ENOMEM); | |
1129 | ||
1130 | /* Copy data from the source */ | |
1131 | server->nfs_client = source->nfs_client; | |
1132 | atomic_inc(&server->nfs_client->cl_count); | |
1133 | nfs_server_copy_userdata(server, source); | |
1134 | ||
1135 | server->fsid = fattr->fsid; | |
1136 | ||
1137 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1138 | if (error < 0) | |
1139 | goto out_free_server; | |
1140 | if (!IS_ERR(source->client_acl)) | |
1141 | nfs_init_server_aclclient(server); | |
1142 | ||
1143 | /* probe the filesystem info for this server filesystem */ | |
1144 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1145 | if (error < 0) | |
1146 | goto out_free_server; | |
1147 | ||
54af3bb5 TM |
1148 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1149 | server->namelen = NFS4_MAXNAMLEN; | |
1150 | ||
54ceac45 | 1151 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1152 | (unsigned long long) server->fsid.major, |
1153 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1154 | |
1155 | error = nfs_start_lockd(server); | |
1156 | if (error < 0) | |
1157 | goto out_free_server; | |
1158 | ||
1159 | spin_lock(&nfs_client_lock); | |
1160 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1161 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1162 | spin_unlock(&nfs_client_lock); | |
1163 | ||
1164 | server->mount_time = jiffies; | |
1165 | ||
1166 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1167 | return server; | |
1168 | ||
1169 | out_free_server: | |
1170 | nfs_free_server(server); | |
1171 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1172 | return ERR_PTR(error); | |
1173 | } | |
6aaca566 DH |
1174 | |
1175 | #ifdef CONFIG_PROC_FS | |
1176 | static struct proc_dir_entry *proc_fs_nfs; | |
1177 | ||
1178 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1179 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1180 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1181 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1182 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1183 | ||
1184 | static struct seq_operations nfs_server_list_ops = { | |
1185 | .start = nfs_server_list_start, | |
1186 | .next = nfs_server_list_next, | |
1187 | .stop = nfs_server_list_stop, | |
1188 | .show = nfs_server_list_show, | |
1189 | }; | |
1190 | ||
00977a59 | 1191 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1192 | .open = nfs_server_list_open, |
1193 | .read = seq_read, | |
1194 | .llseek = seq_lseek, | |
1195 | .release = seq_release, | |
1196 | }; | |
1197 | ||
1198 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1199 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1200 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1201 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1202 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1203 | ||
1204 | static struct seq_operations nfs_volume_list_ops = { | |
1205 | .start = nfs_volume_list_start, | |
1206 | .next = nfs_volume_list_next, | |
1207 | .stop = nfs_volume_list_stop, | |
1208 | .show = nfs_volume_list_show, | |
1209 | }; | |
1210 | ||
00977a59 | 1211 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1212 | .open = nfs_volume_list_open, |
1213 | .read = seq_read, | |
1214 | .llseek = seq_lseek, | |
1215 | .release = seq_release, | |
1216 | }; | |
1217 | ||
1218 | /* | |
1219 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1220 | * we're dealing | |
1221 | */ | |
1222 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1223 | { | |
1224 | struct seq_file *m; | |
1225 | int ret; | |
1226 | ||
1227 | ret = seq_open(file, &nfs_server_list_ops); | |
1228 | if (ret < 0) | |
1229 | return ret; | |
1230 | ||
1231 | m = file->private_data; | |
1232 | m->private = PDE(inode)->data; | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * set up the iterator to start reading from the server list and return the first item | |
1239 | */ | |
1240 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1241 | { | |
6aaca566 DH |
1242 | /* lock the list against modification */ |
1243 | spin_lock(&nfs_client_lock); | |
259902ea | 1244 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1245 | } |
1246 | ||
1247 | /* | |
1248 | * move to next server | |
1249 | */ | |
1250 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1251 | { | |
259902ea | 1252 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * clean up after reading from the transports list | |
1257 | */ | |
1258 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1259 | { | |
1260 | spin_unlock(&nfs_client_lock); | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * display a header line followed by a load of call lines | |
1265 | */ | |
1266 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1267 | { | |
1268 | struct nfs_client *clp; | |
1269 | ||
1270 | /* display header on line 1 */ | |
259902ea | 1271 | if (v == &nfs_client_list) { |
6aaca566 DH |
1272 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | /* display one transport per line on subsequent lines */ | |
1277 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1278 | ||
1279 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n", | |
1280 | clp->cl_nfsversion, | |
1281 | NIPQUAD(clp->cl_addr.sin_addr), | |
1282 | ntohs(clp->cl_addr.sin_port), | |
1283 | atomic_read(&clp->cl_count), | |
1284 | clp->cl_hostname); | |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1291 | */ | |
1292 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1293 | { | |
1294 | struct seq_file *m; | |
1295 | int ret; | |
1296 | ||
1297 | ret = seq_open(file, &nfs_volume_list_ops); | |
1298 | if (ret < 0) | |
1299 | return ret; | |
1300 | ||
1301 | m = file->private_data; | |
1302 | m->private = PDE(inode)->data; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * set up the iterator to start reading from the volume list and return the first item | |
1309 | */ | |
1310 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1311 | { | |
6aaca566 DH |
1312 | /* lock the list against modification */ |
1313 | spin_lock(&nfs_client_lock); | |
259902ea | 1314 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1315 | } |
1316 | ||
1317 | /* | |
1318 | * move to next volume | |
1319 | */ | |
1320 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1321 | { | |
259902ea | 1322 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1323 | } |
1324 | ||
1325 | /* | |
1326 | * clean up after reading from the transports list | |
1327 | */ | |
1328 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1329 | { | |
1330 | spin_unlock(&nfs_client_lock); | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * display a header line followed by a load of call lines | |
1335 | */ | |
1336 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1337 | { | |
1338 | struct nfs_server *server; | |
1339 | struct nfs_client *clp; | |
1340 | char dev[8], fsid[17]; | |
1341 | ||
1342 | /* display header on line 1 */ | |
259902ea | 1343 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1344 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1345 | return 0; | |
1346 | } | |
1347 | /* display one transport per line on subsequent lines */ | |
1348 | server = list_entry(v, struct nfs_server, master_link); | |
1349 | clp = server->nfs_client; | |
1350 | ||
1351 | snprintf(dev, 8, "%u:%u", | |
1352 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1353 | ||
1354 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1355 | (unsigned long long) server->fsid.major, |
1356 | (unsigned long long) server->fsid.minor); | |
6aaca566 DH |
1357 | |
1358 | seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n", | |
1359 | clp->cl_nfsversion, | |
1360 | NIPQUAD(clp->cl_addr.sin_addr), | |
1361 | ntohs(clp->cl_addr.sin_port), | |
1362 | dev, | |
1363 | fsid); | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * initialise the /proc/fs/nfsfs/ directory | |
1370 | */ | |
1371 | int __init nfs_fs_proc_init(void) | |
1372 | { | |
1373 | struct proc_dir_entry *p; | |
1374 | ||
1375 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1376 | if (!proc_fs_nfs) | |
1377 | goto error_0; | |
1378 | ||
1379 | proc_fs_nfs->owner = THIS_MODULE; | |
1380 | ||
1381 | /* a file of servers with which we're dealing */ | |
1382 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1383 | if (!p) | |
1384 | goto error_1; | |
1385 | ||
1386 | p->proc_fops = &nfs_server_list_fops; | |
1387 | p->owner = THIS_MODULE; | |
1388 | ||
1389 | /* a file of volumes that we have mounted */ | |
1390 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1391 | if (!p) | |
1392 | goto error_2; | |
1393 | ||
1394 | p->proc_fops = &nfs_volume_list_fops; | |
1395 | p->owner = THIS_MODULE; | |
1396 | return 0; | |
1397 | ||
1398 | error_2: | |
1399 | remove_proc_entry("servers", proc_fs_nfs); | |
1400 | error_1: | |
1401 | remove_proc_entry("nfsfs", proc_root_fs); | |
1402 | error_0: | |
1403 | return -ENOMEM; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * clean up the /proc/fs/nfsfs/ directory | |
1408 | */ | |
1409 | void nfs_fs_proc_exit(void) | |
1410 | { | |
1411 | remove_proc_entry("volumes", proc_fs_nfs); | |
1412 | remove_proc_entry("servers", proc_fs_nfs); | |
1413 | remove_proc_entry("nfsfs", proc_root_fs); | |
1414 | } | |
1415 | ||
1416 | #endif /* CONFIG_PROC_FS */ |