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> |
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; | |
40c55319 | 99 | const struct nfs_rpc_ops *rpc_ops; |
3a498026 TM |
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 | ||
40c55319 TM |
115 | clp->rpc_ops = cl_init->rpc_ops; |
116 | ||
117 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
118 | if (nfs_callback_up() < 0) |
119 | goto error_2; | |
120 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
121 | } | |
122 | ||
123 | atomic_set(&clp->cl_count, 1); | |
124 | clp->cl_cons_state = NFS_CS_INITING; | |
125 | ||
3a498026 | 126 | memcpy(&clp->cl_addr, cl_init->addr, sizeof(clp->cl_addr)); |
24c8dbbb | 127 | |
3a498026 TM |
128 | if (cl_init->hostname) { |
129 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
130 | if (!clp->cl_hostname) |
131 | goto error_3; | |
132 | } | |
133 | ||
134 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
135 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
136 | ||
137 | #ifdef CONFIG_NFS_V4 | |
138 | init_rwsem(&clp->cl_sem); | |
139 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 140 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 141 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
142 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
143 | clp->cl_boot_time = CURRENT_TIME; | |
144 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
145 | #endif | |
146 | ||
147 | return clp; | |
148 | ||
149 | error_3: | |
9c5bf38d TM |
150 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
151 | nfs_callback_down(); | |
24c8dbbb | 152 | error_2: |
24c8dbbb DH |
153 | kfree(clp); |
154 | error_0: | |
155 | return NULL; | |
156 | } | |
157 | ||
5dd3177a TM |
158 | static void nfs4_shutdown_client(struct nfs_client *clp) |
159 | { | |
160 | #ifdef CONFIG_NFS_V4 | |
161 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
162 | nfs4_kill_renewd(clp); | |
9f958ab8 | 163 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
164 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
165 | nfs_idmap_delete(clp); | |
166 | #endif | |
167 | } | |
168 | ||
24c8dbbb DH |
169 | /* |
170 | * Destroy a shared client record | |
171 | */ | |
172 | static void nfs_free_client(struct nfs_client *clp) | |
173 | { | |
40c55319 | 174 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 175 | |
5dd3177a | 176 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
177 | |
178 | /* -EIO all pending I/O */ | |
179 | if (!IS_ERR(clp->cl_rpcclient)) | |
180 | rpc_shutdown_client(clp->cl_rpcclient); | |
181 | ||
182 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
183 | nfs_callback_down(); | |
184 | ||
24c8dbbb DH |
185 | kfree(clp->cl_hostname); |
186 | kfree(clp); | |
187 | ||
188 | dprintk("<-- nfs_free_client()\n"); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Release a reference to a shared client record | |
193 | */ | |
194 | void nfs_put_client(struct nfs_client *clp) | |
195 | { | |
27ba8512 DH |
196 | if (!clp) |
197 | return; | |
198 | ||
24c8dbbb DH |
199 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
200 | ||
201 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
202 | list_del(&clp->cl_share_link); | |
203 | spin_unlock(&nfs_client_lock); | |
204 | ||
205 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
206 | ||
207 | nfs_free_client(clp); | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
c81468a1 TM |
212 | * Find a client by IP address and protocol version |
213 | * - returns NULL if no such client | |
24c8dbbb | 214 | */ |
c81468a1 | 215 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) |
24c8dbbb DH |
216 | { |
217 | struct nfs_client *clp; | |
218 | ||
c81468a1 | 219 | spin_lock(&nfs_client_lock); |
24c8dbbb | 220 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
13bbc06a | 221 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 222 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
223 | continue; |
224 | ||
24c8dbbb | 225 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 226 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
227 | continue; |
228 | ||
c81468a1 | 229 | /* Match only the IP address, not the port number */ |
d45273ed | 230 | if (clp->cl_addr.sin_addr.s_addr != addr->sin_addr.s_addr) |
24c8dbbb DH |
231 | continue; |
232 | ||
c81468a1 TM |
233 | atomic_inc(&clp->cl_count); |
234 | spin_unlock(&nfs_client_lock); | |
235 | return clp; | |
24c8dbbb | 236 | } |
c81468a1 | 237 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 238 | return NULL; |
24c8dbbb DH |
239 | } |
240 | ||
241 | /* | |
c81468a1 TM |
242 | * Find an nfs_client on the list that matches the initialisation data |
243 | * that is supplied. | |
24c8dbbb | 244 | */ |
c81468a1 | 245 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
246 | { |
247 | struct nfs_client *clp; | |
248 | ||
c81468a1 TM |
249 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
250 | /* Don't match clients that failed to initialise properly */ | |
251 | if (clp->cl_cons_state < 0) | |
252 | continue; | |
253 | ||
254 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 255 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
256 | continue; |
257 | ||
258 | /* Match the full socket address */ | |
259 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
260 | continue; | |
261 | ||
262 | atomic_inc(&clp->cl_count); | |
263 | return clp; | |
13bbc06a | 264 | } |
c81468a1 | 265 | return NULL; |
24c8dbbb DH |
266 | } |
267 | ||
268 | /* | |
269 | * Look up a client by IP address and protocol version | |
270 | * - creates a new record if one doesn't yet exist | |
271 | */ | |
3a498026 | 272 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
273 | { |
274 | struct nfs_client *clp, *new = NULL; | |
275 | int error; | |
276 | ||
40c55319 | 277 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%u)\n", |
3a498026 | 278 | cl_init->hostname ?: "", NIPQUAD(cl_init->addr->sin_addr), |
40c55319 | 279 | cl_init->addr->sin_port, cl_init->rpc_ops->version); |
24c8dbbb DH |
280 | |
281 | /* see if the client already exists */ | |
282 | do { | |
283 | spin_lock(&nfs_client_lock); | |
284 | ||
c81468a1 | 285 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
286 | if (clp) |
287 | goto found_client; | |
288 | if (new) | |
289 | goto install_client; | |
290 | ||
291 | spin_unlock(&nfs_client_lock); | |
292 | ||
3a498026 | 293 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
294 | } while (new); |
295 | ||
296 | return ERR_PTR(-ENOMEM); | |
297 | ||
298 | /* install a new client and return with it unready */ | |
299 | install_client: | |
300 | clp = new; | |
301 | list_add(&clp->cl_share_link, &nfs_client_list); | |
302 | spin_unlock(&nfs_client_lock); | |
303 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
304 | return clp; | |
305 | ||
306 | /* found an existing client | |
307 | * - make sure it's ready before returning | |
308 | */ | |
309 | found_client: | |
310 | spin_unlock(&nfs_client_lock); | |
311 | ||
312 | if (new) | |
313 | nfs_free_client(new); | |
314 | ||
83250493 | 315 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
316 | clp->cl_cons_state != NFS_CS_INITING); |
317 | if (error < 0) { | |
318 | nfs_put_client(clp); | |
319 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
320 | } |
321 | ||
322 | if (clp->cl_cons_state < NFS_CS_READY) { | |
323 | error = clp->cl_cons_state; | |
324 | nfs_put_client(clp); | |
325 | return ERR_PTR(error); | |
326 | } | |
327 | ||
54ceac45 DH |
328 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
329 | ||
24c8dbbb DH |
330 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
331 | return clp; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Mark a server as ready or failed | |
336 | */ | |
54ceac45 | 337 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
338 | { |
339 | clp->cl_cons_state = state; | |
340 | wake_up_all(&nfs_client_active_wq); | |
341 | } | |
5006a76c DH |
342 | |
343 | /* | |
344 | * Initialise the timeout values for a connection | |
345 | */ | |
346 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
347 | unsigned int timeo, unsigned int retrans) | |
348 | { | |
349 | to->to_initval = timeo * HZ / 10; | |
350 | to->to_retries = retrans; | |
351 | if (!to->to_retries) | |
352 | to->to_retries = 2; | |
353 | ||
354 | switch (proto) { | |
0896a725 | 355 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 356 | case XPRT_TRANSPORT_RDMA: |
5006a76c DH |
357 | if (!to->to_initval) |
358 | to->to_initval = 60 * HZ; | |
359 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
360 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
361 | to->to_increment = to->to_initval; | |
362 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
363 | to->to_exponential = 0; | |
364 | break; | |
0896a725 | 365 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
366 | default: |
367 | if (!to->to_initval) | |
368 | to->to_initval = 11 * HZ / 10; | |
369 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
370 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
371 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
372 | to->to_exponential = 1; | |
373 | break; | |
374 | } | |
375 | } | |
376 | ||
377 | /* | |
378 | * Create an RPC client handle | |
379 | */ | |
54ceac45 DH |
380 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
381 | unsigned int timeo, | |
382 | unsigned int retrans, | |
43d78ef2 CL |
383 | rpc_authflavor_t flavor, |
384 | int flags) | |
5006a76c DH |
385 | { |
386 | struct rpc_timeout timeparms; | |
5006a76c | 387 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
388 | struct rpc_create_args args = { |
389 | .protocol = proto, | |
390 | .address = (struct sockaddr *)&clp->cl_addr, | |
391 | .addrsize = sizeof(clp->cl_addr), | |
392 | .timeout = &timeparms, | |
393 | .servername = clp->cl_hostname, | |
394 | .program = &nfs_program, | |
395 | .version = clp->rpc_ops->version, | |
396 | .authflavor = flavor, | |
43d78ef2 | 397 | .flags = flags, |
41877d20 | 398 | }; |
5006a76c DH |
399 | |
400 | if (!IS_ERR(clp->cl_rpcclient)) | |
401 | return 0; | |
402 | ||
403 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
404 | clp->retrans_timeo = timeparms.to_initval; | |
405 | clp->retrans_count = timeparms.to_retries; | |
406 | ||
41877d20 | 407 | clnt = rpc_create(&args); |
5006a76c DH |
408 | if (IS_ERR(clnt)) { |
409 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
410 | __FUNCTION__, PTR_ERR(clnt)); | |
411 | return PTR_ERR(clnt); | |
412 | } | |
413 | ||
5006a76c DH |
414 | clp->cl_rpcclient = clnt; |
415 | return 0; | |
416 | } | |
54ceac45 DH |
417 | |
418 | /* | |
419 | * Version 2 or 3 client destruction | |
420 | */ | |
421 | static void nfs_destroy_server(struct nfs_server *server) | |
422 | { | |
54ceac45 DH |
423 | if (!(server->flags & NFS_MOUNT_NONLM)) |
424 | lockd_down(); /* release rpc.lockd */ | |
425 | } | |
426 | ||
427 | /* | |
428 | * Version 2 or 3 lockd setup | |
429 | */ | |
430 | static int nfs_start_lockd(struct nfs_server *server) | |
431 | { | |
432 | int error = 0; | |
433 | ||
40c55319 | 434 | if (server->nfs_client->rpc_ops->version > 3) |
54ceac45 DH |
435 | goto out; |
436 | if (server->flags & NFS_MOUNT_NONLM) | |
437 | goto out; | |
24e36663 N |
438 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
439 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
440 | if (error < 0) |
441 | server->flags |= NFS_MOUNT_NONLM; | |
442 | else | |
443 | server->destroy = nfs_destroy_server; | |
444 | out: | |
445 | return error; | |
446 | } | |
447 | ||
448 | /* | |
449 | * Initialise an NFSv3 ACL client connection | |
450 | */ | |
451 | #ifdef CONFIG_NFS_V3_ACL | |
452 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
453 | { | |
40c55319 | 454 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
455 | goto out_noacl; |
456 | if (server->flags & NFS_MOUNT_NOACL) | |
457 | goto out_noacl; | |
458 | ||
459 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
460 | if (IS_ERR(server->client_acl)) | |
461 | goto out_noacl; | |
462 | ||
463 | /* No errors! Assume that Sun nfsacls are supported */ | |
464 | server->caps |= NFS_CAP_ACLS; | |
465 | return; | |
466 | ||
467 | out_noacl: | |
468 | server->caps &= ~NFS_CAP_ACLS; | |
469 | } | |
470 | #else | |
471 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
472 | { | |
473 | server->flags &= ~NFS_MOUNT_NOACL; | |
474 | server->caps &= ~NFS_CAP_ACLS; | |
475 | } | |
476 | #endif | |
477 | ||
478 | /* | |
479 | * Create a general RPC client | |
480 | */ | |
481 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
482 | { | |
483 | struct nfs_client *clp = server->nfs_client; | |
484 | ||
485 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
486 | if (IS_ERR(server->client)) { | |
487 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
488 | return PTR_ERR(server->client); | |
489 | } | |
490 | ||
491 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
492 | struct rpc_auth *auth; | |
493 | ||
494 | auth = rpcauth_create(pseudoflavour, server->client); | |
495 | if (IS_ERR(auth)) { | |
496 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
497 | return PTR_ERR(auth); | |
498 | } | |
499 | } | |
500 | server->client->cl_softrtry = 0; | |
501 | if (server->flags & NFS_MOUNT_SOFT) | |
502 | server->client->cl_softrtry = 1; | |
503 | ||
504 | server->client->cl_intr = 0; | |
505 | if (server->flags & NFS4_MOUNT_INTR) | |
506 | server->client->cl_intr = 1; | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Initialise an NFS2 or NFS3 client | |
513 | */ | |
2283f8d6 TT |
514 | static int nfs_init_client(struct nfs_client *clp, |
515 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 516 | { |
54ceac45 DH |
517 | int error; |
518 | ||
519 | if (clp->cl_cons_state == NFS_CS_READY) { | |
520 | /* the client is already initialised */ | |
521 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
522 | return 0; | |
523 | } | |
524 | ||
54ceac45 DH |
525 | /* |
526 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
527 | * - RFC 2623, sec 2.3.2 | |
528 | */ | |
2283f8d6 TT |
529 | error = nfs_create_rpc_client(clp, data->nfs_server.protocol, |
530 | data->timeo, data->retrans, RPC_AUTH_UNIX, 0); | |
54ceac45 DH |
531 | if (error < 0) |
532 | goto error; | |
533 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
534 | return 0; | |
535 | ||
536 | error: | |
537 | nfs_mark_client_ready(clp, error); | |
538 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
539 | return error; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Create a version 2 or 3 client | |
544 | */ | |
2283f8d6 TT |
545 | static int nfs_init_server(struct nfs_server *server, |
546 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 547 | { |
3a498026 TM |
548 | struct nfs_client_initdata cl_init = { |
549 | .hostname = data->nfs_server.hostname, | |
550 | .addr = &data->nfs_server.address, | |
40c55319 | 551 | .rpc_ops = &nfs_v2_clientops, |
3a498026 | 552 | }; |
54ceac45 | 553 | struct nfs_client *clp; |
3a498026 | 554 | int error; |
54ceac45 DH |
555 | |
556 | dprintk("--> nfs_init_server()\n"); | |
557 | ||
558 | #ifdef CONFIG_NFS_V3 | |
559 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 560 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
561 | #endif |
562 | ||
563 | /* Allocate or find a client reference we can use */ | |
3a498026 | 564 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
565 | if (IS_ERR(clp)) { |
566 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
567 | return PTR_ERR(clp); | |
568 | } | |
569 | ||
570 | error = nfs_init_client(clp, data); | |
571 | if (error < 0) | |
572 | goto error; | |
573 | ||
574 | server->nfs_client = clp; | |
575 | ||
576 | /* Initialise the client representation from the mount data */ | |
577 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
578 | ||
579 | if (data->rsize) | |
580 | server->rsize = nfs_block_size(data->rsize, NULL); | |
581 | if (data->wsize) | |
582 | server->wsize = nfs_block_size(data->wsize, NULL); | |
583 | ||
584 | server->acregmin = data->acregmin * HZ; | |
585 | server->acregmax = data->acregmax * HZ; | |
586 | server->acdirmin = data->acdirmin * HZ; | |
587 | server->acdirmax = data->acdirmax * HZ; | |
588 | ||
589 | /* Start lockd here, before we might error out */ | |
590 | error = nfs_start_lockd(server); | |
591 | if (error < 0) | |
592 | goto error; | |
593 | ||
2283f8d6 | 594 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
595 | if (error < 0) |
596 | goto error; | |
597 | ||
598 | server->namelen = data->namlen; | |
599 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
600 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
601 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
602 | return 0; | |
603 | ||
604 | error: | |
605 | server->nfs_client = NULL; | |
606 | nfs_put_client(clp); | |
607 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
608 | return error; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Load up the server record from information gained in an fsinfo record | |
613 | */ | |
614 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
615 | { | |
616 | unsigned long max_rpc_payload; | |
617 | ||
618 | /* Work out a lot of parameters */ | |
619 | if (server->rsize == 0) | |
620 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
621 | if (server->wsize == 0) | |
622 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
623 | ||
624 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
625 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
626 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
627 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
628 | ||
629 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
630 | if (server->rsize > max_rpc_payload) | |
631 | server->rsize = max_rpc_payload; | |
632 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
633 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
634 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 635 | |
54ceac45 DH |
636 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
637 | ||
638 | if (server->wsize > max_rpc_payload) | |
639 | server->wsize = max_rpc_payload; | |
640 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
641 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
642 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
643 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
644 | ||
645 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
646 | if (server->dtsize > PAGE_CACHE_SIZE) | |
647 | server->dtsize = PAGE_CACHE_SIZE; | |
648 | if (server->dtsize > server->rsize) | |
649 | server->dtsize = server->rsize; | |
650 | ||
651 | if (server->flags & NFS_MOUNT_NOAC) { | |
652 | server->acregmin = server->acregmax = 0; | |
653 | server->acdirmin = server->acdirmax = 0; | |
654 | } | |
655 | ||
656 | server->maxfilesize = fsinfo->maxfilesize; | |
657 | ||
658 | /* We're airborne Set socket buffersize */ | |
659 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Probe filesystem information, including the FSID on v2/v3 | |
664 | */ | |
665 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
666 | { | |
667 | struct nfs_fsinfo fsinfo; | |
668 | struct nfs_client *clp = server->nfs_client; | |
669 | int error; | |
670 | ||
671 | dprintk("--> nfs_probe_fsinfo()\n"); | |
672 | ||
673 | if (clp->rpc_ops->set_capabilities != NULL) { | |
674 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
675 | if (error < 0) | |
676 | goto out_error; | |
677 | } | |
678 | ||
679 | fsinfo.fattr = fattr; | |
680 | nfs_fattr_init(fattr); | |
681 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
682 | if (error < 0) | |
683 | goto out_error; | |
684 | ||
685 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
686 | error = bdi_init(&server->backing_dev_info); |
687 | if (error) | |
688 | goto out_error; | |
689 | ||
54ceac45 DH |
690 | |
691 | /* Get some general file system info */ | |
692 | if (server->namelen == 0) { | |
693 | struct nfs_pathconf pathinfo; | |
694 | ||
695 | pathinfo.fattr = fattr; | |
696 | nfs_fattr_init(fattr); | |
697 | ||
698 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
699 | server->namelen = pathinfo.max_namelen; | |
700 | } | |
701 | ||
702 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
703 | return 0; | |
704 | ||
705 | out_error: | |
706 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
707 | return error; | |
708 | } | |
709 | ||
710 | /* | |
711 | * Copy useful information when duplicating a server record | |
712 | */ | |
713 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
714 | { | |
715 | target->flags = source->flags; | |
716 | target->acregmin = source->acregmin; | |
717 | target->acregmax = source->acregmax; | |
718 | target->acdirmin = source->acdirmin; | |
719 | target->acdirmax = source->acdirmax; | |
720 | target->caps = source->caps; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Allocate and initialise a server record | |
725 | */ | |
726 | static struct nfs_server *nfs_alloc_server(void) | |
727 | { | |
728 | struct nfs_server *server; | |
729 | ||
730 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
731 | if (!server) | |
732 | return NULL; | |
733 | ||
734 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
735 | ||
736 | /* Zero out the NFS state stuff */ | |
737 | INIT_LIST_HEAD(&server->client_link); | |
738 | INIT_LIST_HEAD(&server->master_link); | |
739 | ||
ef818a28 SD |
740 | init_waitqueue_head(&server->active_wq); |
741 | atomic_set(&server->active, 0); | |
742 | ||
54ceac45 DH |
743 | server->io_stats = nfs_alloc_iostats(); |
744 | if (!server->io_stats) { | |
745 | kfree(server); | |
746 | return NULL; | |
747 | } | |
748 | ||
749 | return server; | |
750 | } | |
751 | ||
752 | /* | |
753 | * Free up a server record | |
754 | */ | |
755 | void nfs_free_server(struct nfs_server *server) | |
756 | { | |
757 | dprintk("--> nfs_free_server()\n"); | |
758 | ||
759 | spin_lock(&nfs_client_lock); | |
760 | list_del(&server->client_link); | |
761 | list_del(&server->master_link); | |
762 | spin_unlock(&nfs_client_lock); | |
763 | ||
764 | if (server->destroy != NULL) | |
765 | server->destroy(server); | |
5cef338b TM |
766 | |
767 | if (!IS_ERR(server->client_acl)) | |
768 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
769 | if (!IS_ERR(server->client)) |
770 | rpc_shutdown_client(server->client); | |
771 | ||
772 | nfs_put_client(server->nfs_client); | |
773 | ||
774 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 775 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
776 | kfree(server); |
777 | nfs_release_automount_timer(); | |
778 | dprintk("<-- nfs_free_server()\n"); | |
779 | } | |
780 | ||
781 | /* | |
782 | * Create a version 2 or 3 volume record | |
783 | * - keyed on server and FSID | |
784 | */ | |
2283f8d6 | 785 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
786 | struct nfs_fh *mntfh) |
787 | { | |
788 | struct nfs_server *server; | |
789 | struct nfs_fattr fattr; | |
790 | int error; | |
791 | ||
792 | server = nfs_alloc_server(); | |
793 | if (!server) | |
794 | return ERR_PTR(-ENOMEM); | |
795 | ||
796 | /* Get a client representation */ | |
797 | error = nfs_init_server(server, data); | |
798 | if (error < 0) | |
799 | goto error; | |
800 | ||
801 | BUG_ON(!server->nfs_client); | |
802 | BUG_ON(!server->nfs_client->rpc_ops); | |
803 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
804 | ||
805 | /* Probe the root fh to retrieve its FSID */ | |
806 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
807 | if (error < 0) | |
808 | goto error; | |
54af3bb5 TM |
809 | if (server->nfs_client->rpc_ops->version == 3) { |
810 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
811 | server->namelen = NFS3_MAXNAMLEN; | |
812 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
813 | server->caps |= NFS_CAP_READDIRPLUS; | |
814 | } else { | |
815 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
816 | server->namelen = NFS2_MAXNAMLEN; | |
817 | } | |
818 | ||
54ceac45 DH |
819 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
820 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
821 | if (error < 0) { | |
822 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
823 | goto error; | |
824 | } | |
825 | } | |
826 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
827 | ||
6daabf1b DH |
828 | dprintk("Server FSID: %llx:%llx\n", |
829 | (unsigned long long) server->fsid.major, | |
830 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
831 | |
832 | BUG_ON(!server->nfs_client); | |
833 | BUG_ON(!server->nfs_client->rpc_ops); | |
834 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
835 | ||
836 | spin_lock(&nfs_client_lock); | |
837 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
838 | list_add_tail(&server->master_link, &nfs_volume_list); | |
839 | spin_unlock(&nfs_client_lock); | |
840 | ||
841 | server->mount_time = jiffies; | |
842 | return server; | |
843 | ||
844 | error: | |
845 | nfs_free_server(server); | |
846 | return ERR_PTR(error); | |
847 | } | |
848 | ||
849 | #ifdef CONFIG_NFS_V4 | |
850 | /* | |
851 | * Initialise an NFS4 client record | |
852 | */ | |
853 | static int nfs4_init_client(struct nfs_client *clp, | |
854 | int proto, int timeo, int retrans, | |
7d9ac06f | 855 | const char *ip_addr, |
54ceac45 DH |
856 | rpc_authflavor_t authflavour) |
857 | { | |
858 | int error; | |
859 | ||
860 | if (clp->cl_cons_state == NFS_CS_READY) { | |
861 | /* the client is initialised already */ | |
862 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
863 | return 0; | |
864 | } | |
865 | ||
866 | /* Check NFS protocol revision and initialize RPC op vector */ | |
867 | clp->rpc_ops = &nfs_v4_clientops; | |
868 | ||
43d78ef2 CL |
869 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
870 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
871 | if (error < 0) |
872 | goto error; | |
7d9ac06f | 873 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
874 | |
875 | error = nfs_idmap_new(clp); | |
876 | if (error < 0) { | |
877 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
878 | __FUNCTION__, error); | |
54ceac45 DH |
879 | goto error; |
880 | } | |
9c5bf38d | 881 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
882 | |
883 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
884 | return 0; | |
885 | ||
886 | error: | |
887 | nfs_mark_client_ready(clp, error); | |
888 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
889 | return error; | |
890 | } | |
891 | ||
892 | /* | |
893 | * Set up an NFS4 client | |
894 | */ | |
895 | static int nfs4_set_client(struct nfs_server *server, | |
896 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 897 | const char *ip_addr, |
54ceac45 DH |
898 | rpc_authflavor_t authflavour, |
899 | int proto, int timeo, int retrans) | |
900 | { | |
3a498026 TM |
901 | struct nfs_client_initdata cl_init = { |
902 | .hostname = hostname, | |
903 | .addr = addr, | |
40c55319 | 904 | .rpc_ops = &nfs_v4_clientops, |
3a498026 | 905 | }; |
54ceac45 DH |
906 | struct nfs_client *clp; |
907 | int error; | |
908 | ||
909 | dprintk("--> nfs4_set_client()\n"); | |
910 | ||
911 | /* Allocate or find a client reference we can use */ | |
3a498026 | 912 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
913 | if (IS_ERR(clp)) { |
914 | error = PTR_ERR(clp); | |
915 | goto error; | |
916 | } | |
7d9ac06f | 917 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
918 | if (error < 0) |
919 | goto error_put; | |
920 | ||
921 | server->nfs_client = clp; | |
922 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
923 | return 0; | |
924 | ||
925 | error_put: | |
926 | nfs_put_client(clp); | |
927 | error: | |
928 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
929 | return error; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Create a version 4 volume record | |
934 | */ | |
935 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 936 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
937 | { |
938 | int error; | |
939 | ||
940 | dprintk("--> nfs4_init_server()\n"); | |
941 | ||
942 | /* Initialise the client representation from the mount data */ | |
943 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
944 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
945 | ||
946 | if (data->rsize) | |
947 | server->rsize = nfs_block_size(data->rsize, NULL); | |
948 | if (data->wsize) | |
949 | server->wsize = nfs_block_size(data->wsize, NULL); | |
950 | ||
951 | server->acregmin = data->acregmin * HZ; | |
952 | server->acregmax = data->acregmax * HZ; | |
953 | server->acdirmin = data->acdirmin * HZ; | |
954 | server->acdirmax = data->acdirmax * HZ; | |
955 | ||
91ea40b9 | 956 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
957 | |
958 | /* Done */ | |
959 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
960 | return error; | |
961 | } | |
962 | ||
963 | /* | |
964 | * Create a version 4 volume record | |
965 | * - keyed on server and FSID | |
966 | */ | |
91ea40b9 | 967 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
968 | struct nfs_fh *mntfh) |
969 | { | |
970 | struct nfs_fattr fattr; | |
971 | struct nfs_server *server; | |
972 | int error; | |
973 | ||
974 | dprintk("--> nfs4_create_server()\n"); | |
975 | ||
976 | server = nfs_alloc_server(); | |
977 | if (!server) | |
978 | return ERR_PTR(-ENOMEM); | |
979 | ||
980 | /* Get a client record */ | |
91ea40b9 TT |
981 | error = nfs4_set_client(server, |
982 | data->nfs_server.hostname, | |
983 | &data->nfs_server.address, | |
984 | data->client_address, | |
985 | data->auth_flavors[0], | |
986 | data->nfs_server.protocol, | |
987 | data->timeo, data->retrans); | |
54ceac45 DH |
988 | if (error < 0) |
989 | goto error; | |
990 | ||
991 | /* set up the general RPC client */ | |
91ea40b9 | 992 | error = nfs4_init_server(server, data); |
54ceac45 DH |
993 | if (error < 0) |
994 | goto error; | |
995 | ||
996 | BUG_ON(!server->nfs_client); | |
997 | BUG_ON(!server->nfs_client->rpc_ops); | |
998 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
999 | ||
1000 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1001 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1002 | if (error < 0) |
1003 | goto error; | |
1004 | ||
6daabf1b DH |
1005 | dprintk("Server FSID: %llx:%llx\n", |
1006 | (unsigned long long) server->fsid.major, | |
1007 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1008 | dprintk("Mount FH: %d\n", mntfh->size); |
1009 | ||
1010 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1011 | if (error < 0) | |
1012 | goto error; | |
1013 | ||
54af3bb5 TM |
1014 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1015 | server->namelen = NFS4_MAXNAMLEN; | |
1016 | ||
54ceac45 DH |
1017 | BUG_ON(!server->nfs_client); |
1018 | BUG_ON(!server->nfs_client->rpc_ops); | |
1019 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1020 | ||
1021 | spin_lock(&nfs_client_lock); | |
1022 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1023 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1024 | spin_unlock(&nfs_client_lock); | |
1025 | ||
1026 | server->mount_time = jiffies; | |
1027 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1028 | return server; | |
1029 | ||
1030 | error: | |
1031 | nfs_free_server(server); | |
1032 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1033 | return ERR_PTR(error); | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Create an NFS4 referral server record | |
1038 | */ | |
1039 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1040 | struct nfs_fh *mntfh) |
54ceac45 DH |
1041 | { |
1042 | struct nfs_client *parent_client; | |
1043 | struct nfs_server *server, *parent_server; | |
1044 | struct nfs_fattr fattr; | |
1045 | int error; | |
1046 | ||
1047 | dprintk("--> nfs4_create_referral_server()\n"); | |
1048 | ||
1049 | server = nfs_alloc_server(); | |
1050 | if (!server) | |
1051 | return ERR_PTR(-ENOMEM); | |
1052 | ||
1053 | parent_server = NFS_SB(data->sb); | |
1054 | parent_client = parent_server->nfs_client; | |
1055 | ||
1056 | /* Get a client representation. | |
1057 | * Note: NFSv4 always uses TCP, */ | |
1058 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1059 | parent_client->cl_ipaddr, |
54ceac45 DH |
1060 | data->authflavor, |
1061 | parent_server->client->cl_xprt->prot, | |
1062 | parent_client->retrans_timeo, | |
1063 | parent_client->retrans_count); | |
297de4f6 | 1064 | if (error < 0) |
1065 | goto error; | |
54ceac45 DH |
1066 | |
1067 | /* Initialise the client representation from the parent server */ | |
1068 | nfs_server_copy_userdata(server, parent_server); | |
1069 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1070 | ||
1071 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1072 | if (error < 0) | |
1073 | goto error; | |
1074 | ||
1075 | BUG_ON(!server->nfs_client); | |
1076 | BUG_ON(!server->nfs_client->rpc_ops); | |
1077 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1078 | ||
f2d0d85e TM |
1079 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1080 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1081 | if (error < 0) | |
1082 | goto error; | |
1083 | ||
54ceac45 | 1084 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1085 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1086 | if (error < 0) |
1087 | goto error; | |
1088 | ||
54af3bb5 TM |
1089 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1090 | server->namelen = NFS4_MAXNAMLEN; | |
1091 | ||
54ceac45 | 1092 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1093 | (unsigned long long) server->fsid.major, |
1094 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1095 | |
1096 | spin_lock(&nfs_client_lock); | |
1097 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1098 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1099 | spin_unlock(&nfs_client_lock); | |
1100 | ||
1101 | server->mount_time = jiffies; | |
1102 | ||
1103 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1104 | return server; | |
1105 | ||
1106 | error: | |
1107 | nfs_free_server(server); | |
1108 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1109 | return ERR_PTR(error); | |
1110 | } | |
1111 | ||
1112 | #endif /* CONFIG_NFS_V4 */ | |
1113 | ||
1114 | /* | |
1115 | * Clone an NFS2, NFS3 or NFS4 server record | |
1116 | */ | |
1117 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1118 | struct nfs_fh *fh, | |
1119 | struct nfs_fattr *fattr) | |
1120 | { | |
1121 | struct nfs_server *server; | |
1122 | struct nfs_fattr fattr_fsinfo; | |
1123 | int error; | |
1124 | ||
1125 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1126 | (unsigned long long) fattr->fsid.major, |
1127 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1128 | |
1129 | server = nfs_alloc_server(); | |
1130 | if (!server) | |
1131 | return ERR_PTR(-ENOMEM); | |
1132 | ||
1133 | /* Copy data from the source */ | |
1134 | server->nfs_client = source->nfs_client; | |
1135 | atomic_inc(&server->nfs_client->cl_count); | |
1136 | nfs_server_copy_userdata(server, source); | |
1137 | ||
1138 | server->fsid = fattr->fsid; | |
1139 | ||
1140 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1141 | if (error < 0) | |
1142 | goto out_free_server; | |
1143 | if (!IS_ERR(source->client_acl)) | |
1144 | nfs_init_server_aclclient(server); | |
1145 | ||
1146 | /* probe the filesystem info for this server filesystem */ | |
1147 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1148 | if (error < 0) | |
1149 | goto out_free_server; | |
1150 | ||
54af3bb5 TM |
1151 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1152 | server->namelen = NFS4_MAXNAMLEN; | |
1153 | ||
54ceac45 | 1154 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1155 | (unsigned long long) server->fsid.major, |
1156 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1157 | |
1158 | error = nfs_start_lockd(server); | |
1159 | if (error < 0) | |
1160 | goto out_free_server; | |
1161 | ||
1162 | spin_lock(&nfs_client_lock); | |
1163 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1164 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1165 | spin_unlock(&nfs_client_lock); | |
1166 | ||
1167 | server->mount_time = jiffies; | |
1168 | ||
1169 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1170 | return server; | |
1171 | ||
1172 | out_free_server: | |
1173 | nfs_free_server(server); | |
1174 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1175 | return ERR_PTR(error); | |
1176 | } | |
6aaca566 DH |
1177 | |
1178 | #ifdef CONFIG_PROC_FS | |
1179 | static struct proc_dir_entry *proc_fs_nfs; | |
1180 | ||
1181 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1182 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1183 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1184 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1185 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1186 | ||
1187 | static struct seq_operations nfs_server_list_ops = { | |
1188 | .start = nfs_server_list_start, | |
1189 | .next = nfs_server_list_next, | |
1190 | .stop = nfs_server_list_stop, | |
1191 | .show = nfs_server_list_show, | |
1192 | }; | |
1193 | ||
00977a59 | 1194 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1195 | .open = nfs_server_list_open, |
1196 | .read = seq_read, | |
1197 | .llseek = seq_lseek, | |
1198 | .release = seq_release, | |
1199 | }; | |
1200 | ||
1201 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1202 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1203 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1204 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1205 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1206 | ||
1207 | static struct seq_operations nfs_volume_list_ops = { | |
1208 | .start = nfs_volume_list_start, | |
1209 | .next = nfs_volume_list_next, | |
1210 | .stop = nfs_volume_list_stop, | |
1211 | .show = nfs_volume_list_show, | |
1212 | }; | |
1213 | ||
00977a59 | 1214 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1215 | .open = nfs_volume_list_open, |
1216 | .read = seq_read, | |
1217 | .llseek = seq_lseek, | |
1218 | .release = seq_release, | |
1219 | }; | |
1220 | ||
1221 | /* | |
1222 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1223 | * we're dealing | |
1224 | */ | |
1225 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1226 | { | |
1227 | struct seq_file *m; | |
1228 | int ret; | |
1229 | ||
1230 | ret = seq_open(file, &nfs_server_list_ops); | |
1231 | if (ret < 0) | |
1232 | return ret; | |
1233 | ||
1234 | m = file->private_data; | |
1235 | m->private = PDE(inode)->data; | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * set up the iterator to start reading from the server list and return the first item | |
1242 | */ | |
1243 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1244 | { | |
6aaca566 DH |
1245 | /* lock the list against modification */ |
1246 | spin_lock(&nfs_client_lock); | |
259902ea | 1247 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1248 | } |
1249 | ||
1250 | /* | |
1251 | * move to next server | |
1252 | */ | |
1253 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1254 | { | |
259902ea | 1255 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1256 | } |
1257 | ||
1258 | /* | |
1259 | * clean up after reading from the transports list | |
1260 | */ | |
1261 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1262 | { | |
1263 | spin_unlock(&nfs_client_lock); | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * display a header line followed by a load of call lines | |
1268 | */ | |
1269 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1270 | { | |
1271 | struct nfs_client *clp; | |
1272 | ||
1273 | /* display header on line 1 */ | |
259902ea | 1274 | if (v == &nfs_client_list) { |
6aaca566 DH |
1275 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /* display one transport per line on subsequent lines */ | |
1280 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1281 | ||
40c55319 TM |
1282 | seq_printf(m, "v%u %02x%02x%02x%02x %4hx %3d %s\n", |
1283 | clp->rpc_ops->version, | |
6aaca566 DH |
1284 | NIPQUAD(clp->cl_addr.sin_addr), |
1285 | ntohs(clp->cl_addr.sin_port), | |
1286 | atomic_read(&clp->cl_count), | |
1287 | clp->cl_hostname); | |
1288 | ||
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1294 | */ | |
1295 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1296 | { | |
1297 | struct seq_file *m; | |
1298 | int ret; | |
1299 | ||
1300 | ret = seq_open(file, &nfs_volume_list_ops); | |
1301 | if (ret < 0) | |
1302 | return ret; | |
1303 | ||
1304 | m = file->private_data; | |
1305 | m->private = PDE(inode)->data; | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | /* | |
1311 | * set up the iterator to start reading from the volume list and return the first item | |
1312 | */ | |
1313 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1314 | { | |
6aaca566 DH |
1315 | /* lock the list against modification */ |
1316 | spin_lock(&nfs_client_lock); | |
259902ea | 1317 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1318 | } |
1319 | ||
1320 | /* | |
1321 | * move to next volume | |
1322 | */ | |
1323 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1324 | { | |
259902ea | 1325 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1326 | } |
1327 | ||
1328 | /* | |
1329 | * clean up after reading from the transports list | |
1330 | */ | |
1331 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1332 | { | |
1333 | spin_unlock(&nfs_client_lock); | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * display a header line followed by a load of call lines | |
1338 | */ | |
1339 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1340 | { | |
1341 | struct nfs_server *server; | |
1342 | struct nfs_client *clp; | |
1343 | char dev[8], fsid[17]; | |
1344 | ||
1345 | /* display header on line 1 */ | |
259902ea | 1346 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1347 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1348 | return 0; | |
1349 | } | |
1350 | /* display one transport per line on subsequent lines */ | |
1351 | server = list_entry(v, struct nfs_server, master_link); | |
1352 | clp = server->nfs_client; | |
1353 | ||
1354 | snprintf(dev, 8, "%u:%u", | |
1355 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1356 | ||
1357 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1358 | (unsigned long long) server->fsid.major, |
1359 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1360 | |
40c55319 TM |
1361 | seq_printf(m, "v%u %02x%02x%02x%02x %4hx %-7s %-17s\n", |
1362 | clp->rpc_ops->version, | |
6aaca566 DH |
1363 | NIPQUAD(clp->cl_addr.sin_addr), |
1364 | ntohs(clp->cl_addr.sin_port), | |
1365 | dev, | |
1366 | fsid); | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * initialise the /proc/fs/nfsfs/ directory | |
1373 | */ | |
1374 | int __init nfs_fs_proc_init(void) | |
1375 | { | |
1376 | struct proc_dir_entry *p; | |
1377 | ||
1378 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1379 | if (!proc_fs_nfs) | |
1380 | goto error_0; | |
1381 | ||
1382 | proc_fs_nfs->owner = THIS_MODULE; | |
1383 | ||
1384 | /* a file of servers with which we're dealing */ | |
1385 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1386 | if (!p) | |
1387 | goto error_1; | |
1388 | ||
1389 | p->proc_fops = &nfs_server_list_fops; | |
1390 | p->owner = THIS_MODULE; | |
1391 | ||
1392 | /* a file of volumes that we have mounted */ | |
1393 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1394 | if (!p) | |
1395 | goto error_2; | |
1396 | ||
1397 | p->proc_fops = &nfs_volume_list_fops; | |
1398 | p->owner = THIS_MODULE; | |
1399 | return 0; | |
1400 | ||
1401 | error_2: | |
1402 | remove_proc_entry("servers", proc_fs_nfs); | |
1403 | error_1: | |
1404 | remove_proc_entry("nfsfs", proc_root_fs); | |
1405 | error_0: | |
1406 | return -ENOMEM; | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * clean up the /proc/fs/nfsfs/ directory | |
1411 | */ | |
1412 | void nfs_fs_proc_exit(void) | |
1413 | { | |
1414 | remove_proc_entry("volumes", proc_fs_nfs); | |
1415 | remove_proc_entry("servers", proc_fs_nfs); | |
1416 | remove_proc_entry("nfsfs", proc_root_fs); | |
1417 | } | |
1418 | ||
1419 | #endif /* CONFIG_PROC_FS */ |