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> | |
3b0d3f93 TM |
37 | #include <linux/in6.h> |
38 | #include <net/ipv6.h> | |
24c8dbbb DH |
39 | #include <linux/nfs_xdr.h> |
40 | ||
41 | #include <asm/system.h> | |
42 | ||
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
48 | ||
49 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
50 | ||
51 | static DEFINE_SPINLOCK(nfs_client_lock); | |
52 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 53 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
54 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
55 | ||
5006a76c DH |
56 | /* |
57 | * RPC cruft for NFS | |
58 | */ | |
59 | static struct rpc_version *nfs_version[5] = { | |
60 | [2] = &nfs_version2, | |
61 | #ifdef CONFIG_NFS_V3 | |
62 | [3] = &nfs_version3, | |
63 | #endif | |
64 | #ifdef CONFIG_NFS_V4 | |
65 | [4] = &nfs_version4, | |
66 | #endif | |
67 | }; | |
68 | ||
69 | struct rpc_program nfs_program = { | |
70 | .name = "nfs", | |
71 | .number = NFS_PROGRAM, | |
72 | .nrvers = ARRAY_SIZE(nfs_version), | |
73 | .version = nfs_version, | |
74 | .stats = &nfs_rpcstat, | |
75 | .pipe_dir_name = "/nfs", | |
76 | }; | |
77 | ||
78 | struct rpc_stat nfs_rpcstat = { | |
79 | .program = &nfs_program | |
80 | }; | |
81 | ||
82 | ||
83 | #ifdef CONFIG_NFS_V3_ACL | |
84 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
85 | static struct rpc_version * nfsacl_version[] = { | |
86 | [3] = &nfsacl_version3, | |
87 | }; | |
88 | ||
89 | struct rpc_program nfsacl_program = { | |
90 | .name = "nfsacl", | |
91 | .number = NFS_ACL_PROGRAM, | |
92 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
93 | .version = nfsacl_version, | |
94 | .stats = &nfsacl_rpcstat, | |
95 | }; | |
96 | #endif /* CONFIG_NFS_V3_ACL */ | |
97 | ||
3a498026 TM |
98 | struct nfs_client_initdata { |
99 | const char *hostname; | |
100 | const struct sockaddr_in *addr; | |
6e4cffd7 | 101 | size_t addrlen; |
40c55319 | 102 | const struct nfs_rpc_ops *rpc_ops; |
3a498026 TM |
103 | }; |
104 | ||
24c8dbbb DH |
105 | /* |
106 | * Allocate a shared client record | |
107 | * | |
108 | * Since these are allocated/deallocated very rarely, we don't | |
109 | * bother putting them in a slab cache... | |
110 | */ | |
3a498026 | 111 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
112 | { |
113 | struct nfs_client *clp; | |
24c8dbbb DH |
114 | |
115 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
116 | goto error_0; | |
117 | ||
40c55319 TM |
118 | clp->rpc_ops = cl_init->rpc_ops; |
119 | ||
120 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
121 | if (nfs_callback_up() < 0) |
122 | goto error_2; | |
123 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
124 | } | |
125 | ||
126 | atomic_set(&clp->cl_count, 1); | |
127 | clp->cl_cons_state = NFS_CS_INITING; | |
128 | ||
6e4cffd7 CL |
129 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
130 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 131 | |
3a498026 TM |
132 | if (cl_init->hostname) { |
133 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
134 | if (!clp->cl_hostname) |
135 | goto error_3; | |
136 | } | |
137 | ||
138 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
139 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
140 | ||
141 | #ifdef CONFIG_NFS_V4 | |
142 | init_rwsem(&clp->cl_sem); | |
143 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 144 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 145 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
146 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
147 | clp->cl_boot_time = CURRENT_TIME; | |
148 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
149 | #endif | |
150 | ||
151 | return clp; | |
152 | ||
153 | error_3: | |
9c5bf38d TM |
154 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
155 | nfs_callback_down(); | |
24c8dbbb | 156 | error_2: |
24c8dbbb DH |
157 | kfree(clp); |
158 | error_0: | |
159 | return NULL; | |
160 | } | |
161 | ||
5dd3177a TM |
162 | static void nfs4_shutdown_client(struct nfs_client *clp) |
163 | { | |
164 | #ifdef CONFIG_NFS_V4 | |
165 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
166 | nfs4_kill_renewd(clp); | |
9f958ab8 | 167 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
168 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
169 | nfs_idmap_delete(clp); | |
170 | #endif | |
171 | } | |
172 | ||
24c8dbbb DH |
173 | /* |
174 | * Destroy a shared client record | |
175 | */ | |
176 | static void nfs_free_client(struct nfs_client *clp) | |
177 | { | |
40c55319 | 178 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 179 | |
5dd3177a | 180 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
181 | |
182 | /* -EIO all pending I/O */ | |
183 | if (!IS_ERR(clp->cl_rpcclient)) | |
184 | rpc_shutdown_client(clp->cl_rpcclient); | |
185 | ||
186 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
187 | nfs_callback_down(); | |
188 | ||
24c8dbbb DH |
189 | kfree(clp->cl_hostname); |
190 | kfree(clp); | |
191 | ||
192 | dprintk("<-- nfs_free_client()\n"); | |
193 | } | |
194 | ||
195 | /* | |
196 | * Release a reference to a shared client record | |
197 | */ | |
198 | void nfs_put_client(struct nfs_client *clp) | |
199 | { | |
27ba8512 DH |
200 | if (!clp) |
201 | return; | |
202 | ||
24c8dbbb DH |
203 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
204 | ||
205 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
206 | list_del(&clp->cl_share_link); | |
207 | spin_unlock(&nfs_client_lock); | |
208 | ||
209 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
210 | ||
211 | nfs_free_client(clp); | |
212 | } | |
213 | } | |
214 | ||
3b0d3f93 TM |
215 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, |
216 | const struct sockaddr_in *sa2) | |
217 | { | |
218 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
219 | } | |
220 | ||
221 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1, | |
222 | const struct sockaddr_in6 *sa2) | |
223 | { | |
224 | return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr); | |
225 | } | |
226 | ||
227 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
228 | const struct sockaddr *sa2) | |
229 | { | |
230 | switch (sa1->sa_family) { | |
231 | case AF_INET: | |
232 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
233 | (const struct sockaddr_in *)sa2); | |
234 | case AF_INET6: | |
235 | return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1, | |
236 | (const struct sockaddr_in6 *)sa2); | |
237 | } | |
238 | BUG(); | |
239 | } | |
240 | ||
24c8dbbb | 241 | /* |
c81468a1 TM |
242 | * Find a client by IP address and protocol version |
243 | * - returns NULL if no such client | |
24c8dbbb | 244 | */ |
ff052645 | 245 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
246 | { |
247 | struct nfs_client *clp; | |
248 | ||
c81468a1 | 249 | spin_lock(&nfs_client_lock); |
24c8dbbb | 250 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
251 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
252 | ||
13bbc06a | 253 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 254 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
255 | continue; |
256 | ||
24c8dbbb | 257 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 258 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
259 | continue; |
260 | ||
3b0d3f93 TM |
261 | if (addr->sa_family != clap->sa_family) |
262 | continue; | |
c81468a1 | 263 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 264 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
265 | continue; |
266 | ||
c81468a1 TM |
267 | atomic_inc(&clp->cl_count); |
268 | spin_unlock(&nfs_client_lock); | |
269 | return clp; | |
24c8dbbb | 270 | } |
c81468a1 | 271 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 272 | return NULL; |
24c8dbbb DH |
273 | } |
274 | ||
275 | /* | |
c81468a1 TM |
276 | * Find an nfs_client on the list that matches the initialisation data |
277 | * that is supplied. | |
24c8dbbb | 278 | */ |
c81468a1 | 279 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
280 | { |
281 | struct nfs_client *clp; | |
282 | ||
c81468a1 TM |
283 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
284 | /* Don't match clients that failed to initialise properly */ | |
285 | if (clp->cl_cons_state < 0) | |
286 | continue; | |
287 | ||
288 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 289 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
290 | continue; |
291 | ||
292 | /* Match the full socket address */ | |
293 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
294 | continue; | |
295 | ||
296 | atomic_inc(&clp->cl_count); | |
297 | return clp; | |
13bbc06a | 298 | } |
c81468a1 | 299 | return NULL; |
24c8dbbb DH |
300 | } |
301 | ||
302 | /* | |
303 | * Look up a client by IP address and protocol version | |
304 | * - creates a new record if one doesn't yet exist | |
305 | */ | |
3a498026 | 306 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
307 | { |
308 | struct nfs_client *clp, *new = NULL; | |
309 | int error; | |
310 | ||
40c55319 | 311 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%u)\n", |
3a498026 | 312 | cl_init->hostname ?: "", NIPQUAD(cl_init->addr->sin_addr), |
40c55319 | 313 | cl_init->addr->sin_port, cl_init->rpc_ops->version); |
24c8dbbb DH |
314 | |
315 | /* see if the client already exists */ | |
316 | do { | |
317 | spin_lock(&nfs_client_lock); | |
318 | ||
c81468a1 | 319 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
320 | if (clp) |
321 | goto found_client; | |
322 | if (new) | |
323 | goto install_client; | |
324 | ||
325 | spin_unlock(&nfs_client_lock); | |
326 | ||
3a498026 | 327 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
328 | } while (new); |
329 | ||
330 | return ERR_PTR(-ENOMEM); | |
331 | ||
332 | /* install a new client and return with it unready */ | |
333 | install_client: | |
334 | clp = new; | |
335 | list_add(&clp->cl_share_link, &nfs_client_list); | |
336 | spin_unlock(&nfs_client_lock); | |
337 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
338 | return clp; | |
339 | ||
340 | /* found an existing client | |
341 | * - make sure it's ready before returning | |
342 | */ | |
343 | found_client: | |
344 | spin_unlock(&nfs_client_lock); | |
345 | ||
346 | if (new) | |
347 | nfs_free_client(new); | |
348 | ||
83250493 | 349 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
350 | clp->cl_cons_state != NFS_CS_INITING); |
351 | if (error < 0) { | |
352 | nfs_put_client(clp); | |
353 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
354 | } |
355 | ||
356 | if (clp->cl_cons_state < NFS_CS_READY) { | |
357 | error = clp->cl_cons_state; | |
358 | nfs_put_client(clp); | |
359 | return ERR_PTR(error); | |
360 | } | |
361 | ||
54ceac45 DH |
362 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
363 | ||
24c8dbbb DH |
364 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
365 | return clp; | |
366 | } | |
367 | ||
368 | /* | |
369 | * Mark a server as ready or failed | |
370 | */ | |
54ceac45 | 371 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
372 | { |
373 | clp->cl_cons_state = state; | |
374 | wake_up_all(&nfs_client_active_wq); | |
375 | } | |
5006a76c DH |
376 | |
377 | /* | |
378 | * Initialise the timeout values for a connection | |
379 | */ | |
380 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
381 | unsigned int timeo, unsigned int retrans) | |
382 | { | |
383 | to->to_initval = timeo * HZ / 10; | |
384 | to->to_retries = retrans; | |
385 | if (!to->to_retries) | |
386 | to->to_retries = 2; | |
387 | ||
388 | switch (proto) { | |
0896a725 | 389 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 390 | case XPRT_TRANSPORT_RDMA: |
5006a76c DH |
391 | if (!to->to_initval) |
392 | to->to_initval = 60 * HZ; | |
393 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
394 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
395 | to->to_increment = to->to_initval; | |
396 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
397 | to->to_exponential = 0; | |
398 | break; | |
0896a725 | 399 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
400 | default: |
401 | if (!to->to_initval) | |
402 | to->to_initval = 11 * HZ / 10; | |
403 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
404 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
405 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
406 | to->to_exponential = 1; | |
407 | break; | |
408 | } | |
409 | } | |
410 | ||
411 | /* | |
412 | * Create an RPC client handle | |
413 | */ | |
54ceac45 DH |
414 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
415 | unsigned int timeo, | |
416 | unsigned int retrans, | |
43d78ef2 CL |
417 | rpc_authflavor_t flavor, |
418 | int flags) | |
5006a76c DH |
419 | { |
420 | struct rpc_timeout timeparms; | |
5006a76c | 421 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
422 | struct rpc_create_args args = { |
423 | .protocol = proto, | |
424 | .address = (struct sockaddr *)&clp->cl_addr, | |
6e4cffd7 | 425 | .addrsize = clp->cl_addrlen, |
41877d20 CL |
426 | .timeout = &timeparms, |
427 | .servername = clp->cl_hostname, | |
428 | .program = &nfs_program, | |
429 | .version = clp->rpc_ops->version, | |
430 | .authflavor = flavor, | |
43d78ef2 | 431 | .flags = flags, |
41877d20 | 432 | }; |
5006a76c DH |
433 | |
434 | if (!IS_ERR(clp->cl_rpcclient)) | |
435 | return 0; | |
436 | ||
437 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
438 | clp->retrans_timeo = timeparms.to_initval; | |
439 | clp->retrans_count = timeparms.to_retries; | |
440 | ||
41877d20 | 441 | clnt = rpc_create(&args); |
5006a76c DH |
442 | if (IS_ERR(clnt)) { |
443 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
444 | __FUNCTION__, PTR_ERR(clnt)); | |
445 | return PTR_ERR(clnt); | |
446 | } | |
447 | ||
5006a76c DH |
448 | clp->cl_rpcclient = clnt; |
449 | return 0; | |
450 | } | |
54ceac45 DH |
451 | |
452 | /* | |
453 | * Version 2 or 3 client destruction | |
454 | */ | |
455 | static void nfs_destroy_server(struct nfs_server *server) | |
456 | { | |
54ceac45 DH |
457 | if (!(server->flags & NFS_MOUNT_NONLM)) |
458 | lockd_down(); /* release rpc.lockd */ | |
459 | } | |
460 | ||
461 | /* | |
462 | * Version 2 or 3 lockd setup | |
463 | */ | |
464 | static int nfs_start_lockd(struct nfs_server *server) | |
465 | { | |
466 | int error = 0; | |
467 | ||
40c55319 | 468 | if (server->nfs_client->rpc_ops->version > 3) |
54ceac45 DH |
469 | goto out; |
470 | if (server->flags & NFS_MOUNT_NONLM) | |
471 | goto out; | |
24e36663 N |
472 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
473 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
474 | if (error < 0) |
475 | server->flags |= NFS_MOUNT_NONLM; | |
476 | else | |
477 | server->destroy = nfs_destroy_server; | |
478 | out: | |
479 | return error; | |
480 | } | |
481 | ||
482 | /* | |
483 | * Initialise an NFSv3 ACL client connection | |
484 | */ | |
485 | #ifdef CONFIG_NFS_V3_ACL | |
486 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
487 | { | |
40c55319 | 488 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
489 | goto out_noacl; |
490 | if (server->flags & NFS_MOUNT_NOACL) | |
491 | goto out_noacl; | |
492 | ||
493 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
494 | if (IS_ERR(server->client_acl)) | |
495 | goto out_noacl; | |
496 | ||
497 | /* No errors! Assume that Sun nfsacls are supported */ | |
498 | server->caps |= NFS_CAP_ACLS; | |
499 | return; | |
500 | ||
501 | out_noacl: | |
502 | server->caps &= ~NFS_CAP_ACLS; | |
503 | } | |
504 | #else | |
505 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
506 | { | |
507 | server->flags &= ~NFS_MOUNT_NOACL; | |
508 | server->caps &= ~NFS_CAP_ACLS; | |
509 | } | |
510 | #endif | |
511 | ||
512 | /* | |
513 | * Create a general RPC client | |
514 | */ | |
515 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
516 | { | |
517 | struct nfs_client *clp = server->nfs_client; | |
518 | ||
519 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
520 | if (IS_ERR(server->client)) { | |
521 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
522 | return PTR_ERR(server->client); | |
523 | } | |
524 | ||
525 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
526 | struct rpc_auth *auth; | |
527 | ||
528 | auth = rpcauth_create(pseudoflavour, server->client); | |
529 | if (IS_ERR(auth)) { | |
530 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
531 | return PTR_ERR(auth); | |
532 | } | |
533 | } | |
534 | server->client->cl_softrtry = 0; | |
535 | if (server->flags & NFS_MOUNT_SOFT) | |
536 | server->client->cl_softrtry = 1; | |
537 | ||
538 | server->client->cl_intr = 0; | |
539 | if (server->flags & NFS4_MOUNT_INTR) | |
540 | server->client->cl_intr = 1; | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Initialise an NFS2 or NFS3 client | |
547 | */ | |
2283f8d6 TT |
548 | static int nfs_init_client(struct nfs_client *clp, |
549 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 550 | { |
54ceac45 DH |
551 | int error; |
552 | ||
553 | if (clp->cl_cons_state == NFS_CS_READY) { | |
554 | /* the client is already initialised */ | |
555 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
556 | return 0; | |
557 | } | |
558 | ||
54ceac45 DH |
559 | /* |
560 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
561 | * - RFC 2623, sec 2.3.2 | |
562 | */ | |
2283f8d6 TT |
563 | error = nfs_create_rpc_client(clp, data->nfs_server.protocol, |
564 | data->timeo, data->retrans, RPC_AUTH_UNIX, 0); | |
54ceac45 DH |
565 | if (error < 0) |
566 | goto error; | |
567 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
568 | return 0; | |
569 | ||
570 | error: | |
571 | nfs_mark_client_ready(clp, error); | |
572 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
573 | return error; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Create a version 2 or 3 client | |
578 | */ | |
2283f8d6 TT |
579 | static int nfs_init_server(struct nfs_server *server, |
580 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 581 | { |
3a498026 TM |
582 | struct nfs_client_initdata cl_init = { |
583 | .hostname = data->nfs_server.hostname, | |
584 | .addr = &data->nfs_server.address, | |
6e4cffd7 | 585 | .addrlen = sizeof(data->nfs_server.address), |
40c55319 | 586 | .rpc_ops = &nfs_v2_clientops, |
3a498026 | 587 | }; |
54ceac45 | 588 | struct nfs_client *clp; |
3a498026 | 589 | int error; |
54ceac45 DH |
590 | |
591 | dprintk("--> nfs_init_server()\n"); | |
592 | ||
593 | #ifdef CONFIG_NFS_V3 | |
594 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 595 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
596 | #endif |
597 | ||
598 | /* Allocate or find a client reference we can use */ | |
3a498026 | 599 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
600 | if (IS_ERR(clp)) { |
601 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
602 | return PTR_ERR(clp); | |
603 | } | |
604 | ||
605 | error = nfs_init_client(clp, data); | |
606 | if (error < 0) | |
607 | goto error; | |
608 | ||
609 | server->nfs_client = clp; | |
610 | ||
611 | /* Initialise the client representation from the mount data */ | |
612 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
613 | ||
614 | if (data->rsize) | |
615 | server->rsize = nfs_block_size(data->rsize, NULL); | |
616 | if (data->wsize) | |
617 | server->wsize = nfs_block_size(data->wsize, NULL); | |
618 | ||
619 | server->acregmin = data->acregmin * HZ; | |
620 | server->acregmax = data->acregmax * HZ; | |
621 | server->acdirmin = data->acdirmin * HZ; | |
622 | server->acdirmax = data->acdirmax * HZ; | |
623 | ||
624 | /* Start lockd here, before we might error out */ | |
625 | error = nfs_start_lockd(server); | |
626 | if (error < 0) | |
627 | goto error; | |
628 | ||
2283f8d6 | 629 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
630 | if (error < 0) |
631 | goto error; | |
632 | ||
633 | server->namelen = data->namlen; | |
634 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
635 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
636 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
637 | return 0; | |
638 | ||
639 | error: | |
640 | server->nfs_client = NULL; | |
641 | nfs_put_client(clp); | |
642 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
643 | return error; | |
644 | } | |
645 | ||
646 | /* | |
647 | * Load up the server record from information gained in an fsinfo record | |
648 | */ | |
649 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
650 | { | |
651 | unsigned long max_rpc_payload; | |
652 | ||
653 | /* Work out a lot of parameters */ | |
654 | if (server->rsize == 0) | |
655 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
656 | if (server->wsize == 0) | |
657 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
658 | ||
659 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
660 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
661 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
662 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
663 | ||
664 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
665 | if (server->rsize > max_rpc_payload) | |
666 | server->rsize = max_rpc_payload; | |
667 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
668 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
669 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 670 | |
54ceac45 DH |
671 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
672 | ||
673 | if (server->wsize > max_rpc_payload) | |
674 | server->wsize = max_rpc_payload; | |
675 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
676 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
677 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
678 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
679 | ||
680 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
681 | if (server->dtsize > PAGE_CACHE_SIZE) | |
682 | server->dtsize = PAGE_CACHE_SIZE; | |
683 | if (server->dtsize > server->rsize) | |
684 | server->dtsize = server->rsize; | |
685 | ||
686 | if (server->flags & NFS_MOUNT_NOAC) { | |
687 | server->acregmin = server->acregmax = 0; | |
688 | server->acdirmin = server->acdirmax = 0; | |
689 | } | |
690 | ||
691 | server->maxfilesize = fsinfo->maxfilesize; | |
692 | ||
693 | /* We're airborne Set socket buffersize */ | |
694 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
695 | } | |
696 | ||
697 | /* | |
698 | * Probe filesystem information, including the FSID on v2/v3 | |
699 | */ | |
700 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
701 | { | |
702 | struct nfs_fsinfo fsinfo; | |
703 | struct nfs_client *clp = server->nfs_client; | |
704 | int error; | |
705 | ||
706 | dprintk("--> nfs_probe_fsinfo()\n"); | |
707 | ||
708 | if (clp->rpc_ops->set_capabilities != NULL) { | |
709 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
710 | if (error < 0) | |
711 | goto out_error; | |
712 | } | |
713 | ||
714 | fsinfo.fattr = fattr; | |
715 | nfs_fattr_init(fattr); | |
716 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
717 | if (error < 0) | |
718 | goto out_error; | |
719 | ||
720 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
721 | error = bdi_init(&server->backing_dev_info); |
722 | if (error) | |
723 | goto out_error; | |
724 | ||
54ceac45 DH |
725 | |
726 | /* Get some general file system info */ | |
727 | if (server->namelen == 0) { | |
728 | struct nfs_pathconf pathinfo; | |
729 | ||
730 | pathinfo.fattr = fattr; | |
731 | nfs_fattr_init(fattr); | |
732 | ||
733 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
734 | server->namelen = pathinfo.max_namelen; | |
735 | } | |
736 | ||
737 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
738 | return 0; | |
739 | ||
740 | out_error: | |
741 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
742 | return error; | |
743 | } | |
744 | ||
745 | /* | |
746 | * Copy useful information when duplicating a server record | |
747 | */ | |
748 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
749 | { | |
750 | target->flags = source->flags; | |
751 | target->acregmin = source->acregmin; | |
752 | target->acregmax = source->acregmax; | |
753 | target->acdirmin = source->acdirmin; | |
754 | target->acdirmax = source->acdirmax; | |
755 | target->caps = source->caps; | |
756 | } | |
757 | ||
758 | /* | |
759 | * Allocate and initialise a server record | |
760 | */ | |
761 | static struct nfs_server *nfs_alloc_server(void) | |
762 | { | |
763 | struct nfs_server *server; | |
764 | ||
765 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
766 | if (!server) | |
767 | return NULL; | |
768 | ||
769 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
770 | ||
771 | /* Zero out the NFS state stuff */ | |
772 | INIT_LIST_HEAD(&server->client_link); | |
773 | INIT_LIST_HEAD(&server->master_link); | |
774 | ||
ef818a28 SD |
775 | init_waitqueue_head(&server->active_wq); |
776 | atomic_set(&server->active, 0); | |
777 | ||
54ceac45 DH |
778 | server->io_stats = nfs_alloc_iostats(); |
779 | if (!server->io_stats) { | |
780 | kfree(server); | |
781 | return NULL; | |
782 | } | |
783 | ||
784 | return server; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Free up a server record | |
789 | */ | |
790 | void nfs_free_server(struct nfs_server *server) | |
791 | { | |
792 | dprintk("--> nfs_free_server()\n"); | |
793 | ||
794 | spin_lock(&nfs_client_lock); | |
795 | list_del(&server->client_link); | |
796 | list_del(&server->master_link); | |
797 | spin_unlock(&nfs_client_lock); | |
798 | ||
799 | if (server->destroy != NULL) | |
800 | server->destroy(server); | |
5cef338b TM |
801 | |
802 | if (!IS_ERR(server->client_acl)) | |
803 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
804 | if (!IS_ERR(server->client)) |
805 | rpc_shutdown_client(server->client); | |
806 | ||
807 | nfs_put_client(server->nfs_client); | |
808 | ||
809 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 810 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
811 | kfree(server); |
812 | nfs_release_automount_timer(); | |
813 | dprintk("<-- nfs_free_server()\n"); | |
814 | } | |
815 | ||
816 | /* | |
817 | * Create a version 2 or 3 volume record | |
818 | * - keyed on server and FSID | |
819 | */ | |
2283f8d6 | 820 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
821 | struct nfs_fh *mntfh) |
822 | { | |
823 | struct nfs_server *server; | |
824 | struct nfs_fattr fattr; | |
825 | int error; | |
826 | ||
827 | server = nfs_alloc_server(); | |
828 | if (!server) | |
829 | return ERR_PTR(-ENOMEM); | |
830 | ||
831 | /* Get a client representation */ | |
832 | error = nfs_init_server(server, data); | |
833 | if (error < 0) | |
834 | goto error; | |
835 | ||
836 | BUG_ON(!server->nfs_client); | |
837 | BUG_ON(!server->nfs_client->rpc_ops); | |
838 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
839 | ||
840 | /* Probe the root fh to retrieve its FSID */ | |
841 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
842 | if (error < 0) | |
843 | goto error; | |
54af3bb5 TM |
844 | if (server->nfs_client->rpc_ops->version == 3) { |
845 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
846 | server->namelen = NFS3_MAXNAMLEN; | |
847 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
848 | server->caps |= NFS_CAP_READDIRPLUS; | |
849 | } else { | |
850 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
851 | server->namelen = NFS2_MAXNAMLEN; | |
852 | } | |
853 | ||
54ceac45 DH |
854 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
855 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
856 | if (error < 0) { | |
857 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
858 | goto error; | |
859 | } | |
860 | } | |
861 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
862 | ||
6daabf1b DH |
863 | dprintk("Server FSID: %llx:%llx\n", |
864 | (unsigned long long) server->fsid.major, | |
865 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
866 | |
867 | BUG_ON(!server->nfs_client); | |
868 | BUG_ON(!server->nfs_client->rpc_ops); | |
869 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
870 | ||
871 | spin_lock(&nfs_client_lock); | |
872 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
873 | list_add_tail(&server->master_link, &nfs_volume_list); | |
874 | spin_unlock(&nfs_client_lock); | |
875 | ||
876 | server->mount_time = jiffies; | |
877 | return server; | |
878 | ||
879 | error: | |
880 | nfs_free_server(server); | |
881 | return ERR_PTR(error); | |
882 | } | |
883 | ||
884 | #ifdef CONFIG_NFS_V4 | |
885 | /* | |
886 | * Initialise an NFS4 client record | |
887 | */ | |
888 | static int nfs4_init_client(struct nfs_client *clp, | |
889 | int proto, int timeo, int retrans, | |
7d9ac06f | 890 | const char *ip_addr, |
54ceac45 DH |
891 | rpc_authflavor_t authflavour) |
892 | { | |
893 | int error; | |
894 | ||
895 | if (clp->cl_cons_state == NFS_CS_READY) { | |
896 | /* the client is initialised already */ | |
897 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
898 | return 0; | |
899 | } | |
900 | ||
901 | /* Check NFS protocol revision and initialize RPC op vector */ | |
902 | clp->rpc_ops = &nfs_v4_clientops; | |
903 | ||
43d78ef2 CL |
904 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
905 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
906 | if (error < 0) |
907 | goto error; | |
7d9ac06f | 908 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
909 | |
910 | error = nfs_idmap_new(clp); | |
911 | if (error < 0) { | |
912 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
913 | __FUNCTION__, error); | |
54ceac45 DH |
914 | goto error; |
915 | } | |
9c5bf38d | 916 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
917 | |
918 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
919 | return 0; | |
920 | ||
921 | error: | |
922 | nfs_mark_client_ready(clp, error); | |
923 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
924 | return error; | |
925 | } | |
926 | ||
927 | /* | |
928 | * Set up an NFS4 client | |
929 | */ | |
930 | static int nfs4_set_client(struct nfs_server *server, | |
931 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 932 | const char *ip_addr, |
54ceac45 DH |
933 | rpc_authflavor_t authflavour, |
934 | int proto, int timeo, int retrans) | |
935 | { | |
3a498026 TM |
936 | struct nfs_client_initdata cl_init = { |
937 | .hostname = hostname, | |
938 | .addr = addr, | |
6e4cffd7 | 939 | .addrlen = sizeof(*addr), |
40c55319 | 940 | .rpc_ops = &nfs_v4_clientops, |
3a498026 | 941 | }; |
54ceac45 DH |
942 | struct nfs_client *clp; |
943 | int error; | |
944 | ||
945 | dprintk("--> nfs4_set_client()\n"); | |
946 | ||
947 | /* Allocate or find a client reference we can use */ | |
3a498026 | 948 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
949 | if (IS_ERR(clp)) { |
950 | error = PTR_ERR(clp); | |
951 | goto error; | |
952 | } | |
7d9ac06f | 953 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
954 | if (error < 0) |
955 | goto error_put; | |
956 | ||
957 | server->nfs_client = clp; | |
958 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
959 | return 0; | |
960 | ||
961 | error_put: | |
962 | nfs_put_client(clp); | |
963 | error: | |
964 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
965 | return error; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Create a version 4 volume record | |
970 | */ | |
971 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 972 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
973 | { |
974 | int error; | |
975 | ||
976 | dprintk("--> nfs4_init_server()\n"); | |
977 | ||
978 | /* Initialise the client representation from the mount data */ | |
979 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
980 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
981 | ||
982 | if (data->rsize) | |
983 | server->rsize = nfs_block_size(data->rsize, NULL); | |
984 | if (data->wsize) | |
985 | server->wsize = nfs_block_size(data->wsize, NULL); | |
986 | ||
987 | server->acregmin = data->acregmin * HZ; | |
988 | server->acregmax = data->acregmax * HZ; | |
989 | server->acdirmin = data->acdirmin * HZ; | |
990 | server->acdirmax = data->acdirmax * HZ; | |
991 | ||
91ea40b9 | 992 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
993 | |
994 | /* Done */ | |
995 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
996 | return error; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * Create a version 4 volume record | |
1001 | * - keyed on server and FSID | |
1002 | */ | |
91ea40b9 | 1003 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1004 | struct nfs_fh *mntfh) |
1005 | { | |
1006 | struct nfs_fattr fattr; | |
1007 | struct nfs_server *server; | |
1008 | int error; | |
1009 | ||
1010 | dprintk("--> nfs4_create_server()\n"); | |
1011 | ||
1012 | server = nfs_alloc_server(); | |
1013 | if (!server) | |
1014 | return ERR_PTR(-ENOMEM); | |
1015 | ||
1016 | /* Get a client record */ | |
91ea40b9 TT |
1017 | error = nfs4_set_client(server, |
1018 | data->nfs_server.hostname, | |
1019 | &data->nfs_server.address, | |
1020 | data->client_address, | |
1021 | data->auth_flavors[0], | |
1022 | data->nfs_server.protocol, | |
1023 | data->timeo, data->retrans); | |
54ceac45 DH |
1024 | if (error < 0) |
1025 | goto error; | |
1026 | ||
1027 | /* set up the general RPC client */ | |
91ea40b9 | 1028 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1029 | if (error < 0) |
1030 | goto error; | |
1031 | ||
1032 | BUG_ON(!server->nfs_client); | |
1033 | BUG_ON(!server->nfs_client->rpc_ops); | |
1034 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1035 | ||
1036 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1037 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1038 | if (error < 0) |
1039 | goto error; | |
1040 | ||
6daabf1b DH |
1041 | dprintk("Server FSID: %llx:%llx\n", |
1042 | (unsigned long long) server->fsid.major, | |
1043 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1044 | dprintk("Mount FH: %d\n", mntfh->size); |
1045 | ||
1046 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1047 | if (error < 0) | |
1048 | goto error; | |
1049 | ||
54af3bb5 TM |
1050 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1051 | server->namelen = NFS4_MAXNAMLEN; | |
1052 | ||
54ceac45 DH |
1053 | BUG_ON(!server->nfs_client); |
1054 | BUG_ON(!server->nfs_client->rpc_ops); | |
1055 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1056 | ||
1057 | spin_lock(&nfs_client_lock); | |
1058 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1059 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1060 | spin_unlock(&nfs_client_lock); | |
1061 | ||
1062 | server->mount_time = jiffies; | |
1063 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1064 | return server; | |
1065 | ||
1066 | error: | |
1067 | nfs_free_server(server); | |
1068 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1069 | return ERR_PTR(error); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Create an NFS4 referral server record | |
1074 | */ | |
1075 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1076 | struct nfs_fh *mntfh) |
54ceac45 DH |
1077 | { |
1078 | struct nfs_client *parent_client; | |
1079 | struct nfs_server *server, *parent_server; | |
1080 | struct nfs_fattr fattr; | |
1081 | int error; | |
1082 | ||
1083 | dprintk("--> nfs4_create_referral_server()\n"); | |
1084 | ||
1085 | server = nfs_alloc_server(); | |
1086 | if (!server) | |
1087 | return ERR_PTR(-ENOMEM); | |
1088 | ||
1089 | parent_server = NFS_SB(data->sb); | |
1090 | parent_client = parent_server->nfs_client; | |
1091 | ||
1092 | /* Get a client representation. | |
1093 | * Note: NFSv4 always uses TCP, */ | |
1094 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1095 | parent_client->cl_ipaddr, |
54ceac45 DH |
1096 | data->authflavor, |
1097 | parent_server->client->cl_xprt->prot, | |
1098 | parent_client->retrans_timeo, | |
1099 | parent_client->retrans_count); | |
297de4f6 AA |
1100 | if (error < 0) |
1101 | goto error; | |
54ceac45 DH |
1102 | |
1103 | /* Initialise the client representation from the parent server */ | |
1104 | nfs_server_copy_userdata(server, parent_server); | |
1105 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1106 | ||
1107 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1108 | if (error < 0) | |
1109 | goto error; | |
1110 | ||
1111 | BUG_ON(!server->nfs_client); | |
1112 | BUG_ON(!server->nfs_client->rpc_ops); | |
1113 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1114 | ||
f2d0d85e TM |
1115 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1116 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1117 | if (error < 0) | |
1118 | goto error; | |
1119 | ||
54ceac45 | 1120 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1121 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1122 | if (error < 0) |
1123 | goto error; | |
1124 | ||
54af3bb5 TM |
1125 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1126 | server->namelen = NFS4_MAXNAMLEN; | |
1127 | ||
54ceac45 | 1128 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1129 | (unsigned long long) server->fsid.major, |
1130 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1131 | |
1132 | spin_lock(&nfs_client_lock); | |
1133 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1134 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1135 | spin_unlock(&nfs_client_lock); | |
1136 | ||
1137 | server->mount_time = jiffies; | |
1138 | ||
1139 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1140 | return server; | |
1141 | ||
1142 | error: | |
1143 | nfs_free_server(server); | |
1144 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1145 | return ERR_PTR(error); | |
1146 | } | |
1147 | ||
1148 | #endif /* CONFIG_NFS_V4 */ | |
1149 | ||
1150 | /* | |
1151 | * Clone an NFS2, NFS3 or NFS4 server record | |
1152 | */ | |
1153 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1154 | struct nfs_fh *fh, | |
1155 | struct nfs_fattr *fattr) | |
1156 | { | |
1157 | struct nfs_server *server; | |
1158 | struct nfs_fattr fattr_fsinfo; | |
1159 | int error; | |
1160 | ||
1161 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1162 | (unsigned long long) fattr->fsid.major, |
1163 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1164 | |
1165 | server = nfs_alloc_server(); | |
1166 | if (!server) | |
1167 | return ERR_PTR(-ENOMEM); | |
1168 | ||
1169 | /* Copy data from the source */ | |
1170 | server->nfs_client = source->nfs_client; | |
1171 | atomic_inc(&server->nfs_client->cl_count); | |
1172 | nfs_server_copy_userdata(server, source); | |
1173 | ||
1174 | server->fsid = fattr->fsid; | |
1175 | ||
1176 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1177 | if (error < 0) | |
1178 | goto out_free_server; | |
1179 | if (!IS_ERR(source->client_acl)) | |
1180 | nfs_init_server_aclclient(server); | |
1181 | ||
1182 | /* probe the filesystem info for this server filesystem */ | |
1183 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1184 | if (error < 0) | |
1185 | goto out_free_server; | |
1186 | ||
54af3bb5 TM |
1187 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1188 | server->namelen = NFS4_MAXNAMLEN; | |
1189 | ||
54ceac45 | 1190 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1191 | (unsigned long long) server->fsid.major, |
1192 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1193 | |
1194 | error = nfs_start_lockd(server); | |
1195 | if (error < 0) | |
1196 | goto out_free_server; | |
1197 | ||
1198 | spin_lock(&nfs_client_lock); | |
1199 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1200 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1201 | spin_unlock(&nfs_client_lock); | |
1202 | ||
1203 | server->mount_time = jiffies; | |
1204 | ||
1205 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1206 | return server; | |
1207 | ||
1208 | out_free_server: | |
1209 | nfs_free_server(server); | |
1210 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1211 | return ERR_PTR(error); | |
1212 | } | |
6aaca566 DH |
1213 | |
1214 | #ifdef CONFIG_PROC_FS | |
1215 | static struct proc_dir_entry *proc_fs_nfs; | |
1216 | ||
1217 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1218 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1219 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1220 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1221 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1222 | ||
1223 | static struct seq_operations nfs_server_list_ops = { | |
1224 | .start = nfs_server_list_start, | |
1225 | .next = nfs_server_list_next, | |
1226 | .stop = nfs_server_list_stop, | |
1227 | .show = nfs_server_list_show, | |
1228 | }; | |
1229 | ||
00977a59 | 1230 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1231 | .open = nfs_server_list_open, |
1232 | .read = seq_read, | |
1233 | .llseek = seq_lseek, | |
1234 | .release = seq_release, | |
1235 | }; | |
1236 | ||
1237 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1238 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1239 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1240 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1241 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1242 | ||
1243 | static struct seq_operations nfs_volume_list_ops = { | |
1244 | .start = nfs_volume_list_start, | |
1245 | .next = nfs_volume_list_next, | |
1246 | .stop = nfs_volume_list_stop, | |
1247 | .show = nfs_volume_list_show, | |
1248 | }; | |
1249 | ||
00977a59 | 1250 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1251 | .open = nfs_volume_list_open, |
1252 | .read = seq_read, | |
1253 | .llseek = seq_lseek, | |
1254 | .release = seq_release, | |
1255 | }; | |
1256 | ||
1257 | /* | |
1258 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1259 | * we're dealing | |
1260 | */ | |
1261 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1262 | { | |
1263 | struct seq_file *m; | |
1264 | int ret; | |
1265 | ||
1266 | ret = seq_open(file, &nfs_server_list_ops); | |
1267 | if (ret < 0) | |
1268 | return ret; | |
1269 | ||
1270 | m = file->private_data; | |
1271 | m->private = PDE(inode)->data; | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * set up the iterator to start reading from the server list and return the first item | |
1278 | */ | |
1279 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1280 | { | |
6aaca566 DH |
1281 | /* lock the list against modification */ |
1282 | spin_lock(&nfs_client_lock); | |
259902ea | 1283 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1284 | } |
1285 | ||
1286 | /* | |
1287 | * move to next server | |
1288 | */ | |
1289 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1290 | { | |
259902ea | 1291 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1292 | } |
1293 | ||
1294 | /* | |
1295 | * clean up after reading from the transports list | |
1296 | */ | |
1297 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1298 | { | |
1299 | spin_unlock(&nfs_client_lock); | |
1300 | } | |
1301 | ||
1302 | /* | |
1303 | * display a header line followed by a load of call lines | |
1304 | */ | |
1305 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1306 | { | |
1307 | struct nfs_client *clp; | |
1308 | ||
1309 | /* display header on line 1 */ | |
259902ea | 1310 | if (v == &nfs_client_list) { |
6aaca566 DH |
1311 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | /* display one transport per line on subsequent lines */ | |
1316 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1317 | ||
5d8515ca | 1318 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1319 | clp->rpc_ops->version, |
5d8515ca CL |
1320 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1321 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1322 | atomic_read(&clp->cl_count), |
1323 | clp->cl_hostname); | |
1324 | ||
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1330 | */ | |
1331 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1332 | { | |
1333 | struct seq_file *m; | |
1334 | int ret; | |
1335 | ||
1336 | ret = seq_open(file, &nfs_volume_list_ops); | |
1337 | if (ret < 0) | |
1338 | return ret; | |
1339 | ||
1340 | m = file->private_data; | |
1341 | m->private = PDE(inode)->data; | |
1342 | ||
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * set up the iterator to start reading from the volume list and return the first item | |
1348 | */ | |
1349 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1350 | { | |
6aaca566 DH |
1351 | /* lock the list against modification */ |
1352 | spin_lock(&nfs_client_lock); | |
259902ea | 1353 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1354 | } |
1355 | ||
1356 | /* | |
1357 | * move to next volume | |
1358 | */ | |
1359 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1360 | { | |
259902ea | 1361 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1362 | } |
1363 | ||
1364 | /* | |
1365 | * clean up after reading from the transports list | |
1366 | */ | |
1367 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1368 | { | |
1369 | spin_unlock(&nfs_client_lock); | |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * display a header line followed by a load of call lines | |
1374 | */ | |
1375 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1376 | { | |
1377 | struct nfs_server *server; | |
1378 | struct nfs_client *clp; | |
1379 | char dev[8], fsid[17]; | |
1380 | ||
1381 | /* display header on line 1 */ | |
259902ea | 1382 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1383 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1384 | return 0; | |
1385 | } | |
1386 | /* display one transport per line on subsequent lines */ | |
1387 | server = list_entry(v, struct nfs_server, master_link); | |
1388 | clp = server->nfs_client; | |
1389 | ||
1390 | snprintf(dev, 8, "%u:%u", | |
1391 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1392 | ||
1393 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1394 | (unsigned long long) server->fsid.major, |
1395 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1396 | |
5d8515ca | 1397 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1398 | clp->rpc_ops->version, |
5d8515ca CL |
1399 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1400 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1401 | dev, |
1402 | fsid); | |
1403 | ||
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * initialise the /proc/fs/nfsfs/ directory | |
1409 | */ | |
1410 | int __init nfs_fs_proc_init(void) | |
1411 | { | |
1412 | struct proc_dir_entry *p; | |
1413 | ||
1414 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1415 | if (!proc_fs_nfs) | |
1416 | goto error_0; | |
1417 | ||
1418 | proc_fs_nfs->owner = THIS_MODULE; | |
1419 | ||
1420 | /* a file of servers with which we're dealing */ | |
1421 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1422 | if (!p) | |
1423 | goto error_1; | |
1424 | ||
1425 | p->proc_fops = &nfs_server_list_fops; | |
1426 | p->owner = THIS_MODULE; | |
1427 | ||
1428 | /* a file of volumes that we have mounted */ | |
1429 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1430 | if (!p) | |
1431 | goto error_2; | |
1432 | ||
1433 | p->proc_fops = &nfs_volume_list_fops; | |
1434 | p->owner = THIS_MODULE; | |
1435 | return 0; | |
1436 | ||
1437 | error_2: | |
1438 | remove_proc_entry("servers", proc_fs_nfs); | |
1439 | error_1: | |
1440 | remove_proc_entry("nfsfs", proc_root_fs); | |
1441 | error_0: | |
1442 | return -ENOMEM; | |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * clean up the /proc/fs/nfsfs/ directory | |
1447 | */ | |
1448 | void nfs_fs_proc_exit(void) | |
1449 | { | |
1450 | remove_proc_entry("volumes", proc_fs_nfs); | |
1451 | remove_proc_entry("servers", proc_fs_nfs); | |
1452 | remove_proc_entry("nfsfs", proc_root_fs); | |
1453 | } | |
1454 | ||
1455 | #endif /* CONFIG_PROC_FS */ |