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; | |
40c55319 | 101 | const struct nfs_rpc_ops *rpc_ops; |
3a498026 TM |
102 | }; |
103 | ||
24c8dbbb DH |
104 | /* |
105 | * Allocate a shared client record | |
106 | * | |
107 | * Since these are allocated/deallocated very rarely, we don't | |
108 | * bother putting them in a slab cache... | |
109 | */ | |
3a498026 | 110 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
111 | { |
112 | struct nfs_client *clp; | |
24c8dbbb DH |
113 | |
114 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
115 | goto error_0; | |
116 | ||
40c55319 TM |
117 | clp->rpc_ops = cl_init->rpc_ops; |
118 | ||
119 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
120 | if (nfs_callback_up() < 0) |
121 | goto error_2; | |
122 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
123 | } | |
124 | ||
125 | atomic_set(&clp->cl_count, 1); | |
126 | clp->cl_cons_state = NFS_CS_INITING; | |
127 | ||
3a498026 | 128 | memcpy(&clp->cl_addr, cl_init->addr, sizeof(clp->cl_addr)); |
24c8dbbb | 129 | |
3a498026 TM |
130 | if (cl_init->hostname) { |
131 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
132 | if (!clp->cl_hostname) |
133 | goto error_3; | |
134 | } | |
135 | ||
136 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
137 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
138 | ||
139 | #ifdef CONFIG_NFS_V4 | |
140 | init_rwsem(&clp->cl_sem); | |
141 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 142 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 143 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
144 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
145 | clp->cl_boot_time = CURRENT_TIME; | |
146 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
147 | #endif | |
148 | ||
149 | return clp; | |
150 | ||
151 | error_3: | |
9c5bf38d TM |
152 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
153 | nfs_callback_down(); | |
24c8dbbb | 154 | error_2: |
24c8dbbb DH |
155 | kfree(clp); |
156 | error_0: | |
157 | return NULL; | |
158 | } | |
159 | ||
5dd3177a TM |
160 | static void nfs4_shutdown_client(struct nfs_client *clp) |
161 | { | |
162 | #ifdef CONFIG_NFS_V4 | |
163 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
164 | nfs4_kill_renewd(clp); | |
9f958ab8 | 165 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
166 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
167 | nfs_idmap_delete(clp); | |
168 | #endif | |
169 | } | |
170 | ||
24c8dbbb DH |
171 | /* |
172 | * Destroy a shared client record | |
173 | */ | |
174 | static void nfs_free_client(struct nfs_client *clp) | |
175 | { | |
40c55319 | 176 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 177 | |
5dd3177a | 178 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
179 | |
180 | /* -EIO all pending I/O */ | |
181 | if (!IS_ERR(clp->cl_rpcclient)) | |
182 | rpc_shutdown_client(clp->cl_rpcclient); | |
183 | ||
184 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
185 | nfs_callback_down(); | |
186 | ||
24c8dbbb DH |
187 | kfree(clp->cl_hostname); |
188 | kfree(clp); | |
189 | ||
190 | dprintk("<-- nfs_free_client()\n"); | |
191 | } | |
192 | ||
193 | /* | |
194 | * Release a reference to a shared client record | |
195 | */ | |
196 | void nfs_put_client(struct nfs_client *clp) | |
197 | { | |
27ba8512 DH |
198 | if (!clp) |
199 | return; | |
200 | ||
24c8dbbb DH |
201 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
202 | ||
203 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
204 | list_del(&clp->cl_share_link); | |
205 | spin_unlock(&nfs_client_lock); | |
206 | ||
207 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
208 | ||
209 | nfs_free_client(clp); | |
210 | } | |
211 | } | |
212 | ||
3b0d3f93 TM |
213 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, |
214 | const struct sockaddr_in *sa2) | |
215 | { | |
216 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
217 | } | |
218 | ||
219 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1, | |
220 | const struct sockaddr_in6 *sa2) | |
221 | { | |
222 | return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr); | |
223 | } | |
224 | ||
225 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
226 | const struct sockaddr *sa2) | |
227 | { | |
228 | switch (sa1->sa_family) { | |
229 | case AF_INET: | |
230 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
231 | (const struct sockaddr_in *)sa2); | |
232 | case AF_INET6: | |
233 | return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1, | |
234 | (const struct sockaddr_in6 *)sa2); | |
235 | } | |
236 | BUG(); | |
237 | } | |
238 | ||
24c8dbbb | 239 | /* |
c81468a1 TM |
240 | * Find a client by IP address and protocol version |
241 | * - returns NULL if no such client | |
24c8dbbb | 242 | */ |
3b0d3f93 | 243 | struct nfs_client *_nfs_find_client(const struct sockaddr *addr, int nfsversion) |
24c8dbbb DH |
244 | { |
245 | struct nfs_client *clp; | |
246 | ||
c81468a1 | 247 | spin_lock(&nfs_client_lock); |
24c8dbbb | 248 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
249 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
250 | ||
13bbc06a | 251 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 252 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
253 | continue; |
254 | ||
24c8dbbb | 255 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 256 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
257 | continue; |
258 | ||
3b0d3f93 TM |
259 | if (addr->sa_family != clap->sa_family) |
260 | continue; | |
c81468a1 | 261 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 262 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
263 | continue; |
264 | ||
c81468a1 TM |
265 | atomic_inc(&clp->cl_count); |
266 | spin_unlock(&nfs_client_lock); | |
267 | return clp; | |
24c8dbbb | 268 | } |
c81468a1 | 269 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 270 | return NULL; |
24c8dbbb DH |
271 | } |
272 | ||
3b0d3f93 TM |
273 | struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversion) |
274 | { | |
275 | return _nfs_find_client((const struct sockaddr *)addr, nfsversion); | |
276 | } | |
277 | ||
24c8dbbb | 278 | /* |
c81468a1 TM |
279 | * Find an nfs_client on the list that matches the initialisation data |
280 | * that is supplied. | |
24c8dbbb | 281 | */ |
c81468a1 | 282 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
283 | { |
284 | struct nfs_client *clp; | |
285 | ||
c81468a1 TM |
286 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
287 | /* Don't match clients that failed to initialise properly */ | |
288 | if (clp->cl_cons_state < 0) | |
289 | continue; | |
290 | ||
291 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 292 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
293 | continue; |
294 | ||
295 | /* Match the full socket address */ | |
296 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
297 | continue; | |
298 | ||
299 | atomic_inc(&clp->cl_count); | |
300 | return clp; | |
13bbc06a | 301 | } |
c81468a1 | 302 | return NULL; |
24c8dbbb DH |
303 | } |
304 | ||
305 | /* | |
306 | * Look up a client by IP address and protocol version | |
307 | * - creates a new record if one doesn't yet exist | |
308 | */ | |
3a498026 | 309 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
310 | { |
311 | struct nfs_client *clp, *new = NULL; | |
312 | int error; | |
313 | ||
40c55319 | 314 | dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%u)\n", |
3a498026 | 315 | cl_init->hostname ?: "", NIPQUAD(cl_init->addr->sin_addr), |
40c55319 | 316 | cl_init->addr->sin_port, cl_init->rpc_ops->version); |
24c8dbbb DH |
317 | |
318 | /* see if the client already exists */ | |
319 | do { | |
320 | spin_lock(&nfs_client_lock); | |
321 | ||
c81468a1 | 322 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
323 | if (clp) |
324 | goto found_client; | |
325 | if (new) | |
326 | goto install_client; | |
327 | ||
328 | spin_unlock(&nfs_client_lock); | |
329 | ||
3a498026 | 330 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
331 | } while (new); |
332 | ||
333 | return ERR_PTR(-ENOMEM); | |
334 | ||
335 | /* install a new client and return with it unready */ | |
336 | install_client: | |
337 | clp = new; | |
338 | list_add(&clp->cl_share_link, &nfs_client_list); | |
339 | spin_unlock(&nfs_client_lock); | |
340 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
341 | return clp; | |
342 | ||
343 | /* found an existing client | |
344 | * - make sure it's ready before returning | |
345 | */ | |
346 | found_client: | |
347 | spin_unlock(&nfs_client_lock); | |
348 | ||
349 | if (new) | |
350 | nfs_free_client(new); | |
351 | ||
83250493 | 352 | error = wait_event_interruptible(nfs_client_active_wq, |
0bae89ec TM |
353 | clp->cl_cons_state != NFS_CS_INITING); |
354 | if (error < 0) { | |
355 | nfs_put_client(clp); | |
356 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
357 | } |
358 | ||
359 | if (clp->cl_cons_state < NFS_CS_READY) { | |
360 | error = clp->cl_cons_state; | |
361 | nfs_put_client(clp); | |
362 | return ERR_PTR(error); | |
363 | } | |
364 | ||
54ceac45 DH |
365 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
366 | ||
24c8dbbb DH |
367 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
368 | return clp; | |
369 | } | |
370 | ||
371 | /* | |
372 | * Mark a server as ready or failed | |
373 | */ | |
54ceac45 | 374 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
375 | { |
376 | clp->cl_cons_state = state; | |
377 | wake_up_all(&nfs_client_active_wq); | |
378 | } | |
5006a76c DH |
379 | |
380 | /* | |
381 | * Initialise the timeout values for a connection | |
382 | */ | |
383 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
384 | unsigned int timeo, unsigned int retrans) | |
385 | { | |
386 | to->to_initval = timeo * HZ / 10; | |
387 | to->to_retries = retrans; | |
388 | if (!to->to_retries) | |
389 | to->to_retries = 2; | |
390 | ||
391 | switch (proto) { | |
0896a725 | 392 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 393 | case XPRT_TRANSPORT_RDMA: |
5006a76c DH |
394 | if (!to->to_initval) |
395 | to->to_initval = 60 * HZ; | |
396 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
397 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
398 | to->to_increment = to->to_initval; | |
399 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
400 | to->to_exponential = 0; | |
401 | break; | |
0896a725 | 402 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
403 | default: |
404 | if (!to->to_initval) | |
405 | to->to_initval = 11 * HZ / 10; | |
406 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
407 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
408 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
409 | to->to_exponential = 1; | |
410 | break; | |
411 | } | |
412 | } | |
413 | ||
414 | /* | |
415 | * Create an RPC client handle | |
416 | */ | |
54ceac45 DH |
417 | static int nfs_create_rpc_client(struct nfs_client *clp, int proto, |
418 | unsigned int timeo, | |
419 | unsigned int retrans, | |
43d78ef2 CL |
420 | rpc_authflavor_t flavor, |
421 | int flags) | |
5006a76c DH |
422 | { |
423 | struct rpc_timeout timeparms; | |
5006a76c | 424 | struct rpc_clnt *clnt = NULL; |
41877d20 CL |
425 | struct rpc_create_args args = { |
426 | .protocol = proto, | |
427 | .address = (struct sockaddr *)&clp->cl_addr, | |
428 | .addrsize = sizeof(clp->cl_addr), | |
429 | .timeout = &timeparms, | |
430 | .servername = clp->cl_hostname, | |
431 | .program = &nfs_program, | |
432 | .version = clp->rpc_ops->version, | |
433 | .authflavor = flavor, | |
43d78ef2 | 434 | .flags = flags, |
41877d20 | 435 | }; |
5006a76c DH |
436 | |
437 | if (!IS_ERR(clp->cl_rpcclient)) | |
438 | return 0; | |
439 | ||
440 | nfs_init_timeout_values(&timeparms, proto, timeo, retrans); | |
441 | clp->retrans_timeo = timeparms.to_initval; | |
442 | clp->retrans_count = timeparms.to_retries; | |
443 | ||
41877d20 | 444 | clnt = rpc_create(&args); |
5006a76c DH |
445 | if (IS_ERR(clnt)) { |
446 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
447 | __FUNCTION__, PTR_ERR(clnt)); | |
448 | return PTR_ERR(clnt); | |
449 | } | |
450 | ||
5006a76c DH |
451 | clp->cl_rpcclient = clnt; |
452 | return 0; | |
453 | } | |
54ceac45 DH |
454 | |
455 | /* | |
456 | * Version 2 or 3 client destruction | |
457 | */ | |
458 | static void nfs_destroy_server(struct nfs_server *server) | |
459 | { | |
54ceac45 DH |
460 | if (!(server->flags & NFS_MOUNT_NONLM)) |
461 | lockd_down(); /* release rpc.lockd */ | |
462 | } | |
463 | ||
464 | /* | |
465 | * Version 2 or 3 lockd setup | |
466 | */ | |
467 | static int nfs_start_lockd(struct nfs_server *server) | |
468 | { | |
469 | int error = 0; | |
470 | ||
40c55319 | 471 | if (server->nfs_client->rpc_ops->version > 3) |
54ceac45 DH |
472 | goto out; |
473 | if (server->flags & NFS_MOUNT_NONLM) | |
474 | goto out; | |
24e36663 N |
475 | error = lockd_up((server->flags & NFS_MOUNT_TCP) ? |
476 | IPPROTO_TCP : IPPROTO_UDP); | |
54ceac45 DH |
477 | if (error < 0) |
478 | server->flags |= NFS_MOUNT_NONLM; | |
479 | else | |
480 | server->destroy = nfs_destroy_server; | |
481 | out: | |
482 | return error; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Initialise an NFSv3 ACL client connection | |
487 | */ | |
488 | #ifdef CONFIG_NFS_V3_ACL | |
489 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
490 | { | |
40c55319 | 491 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
492 | goto out_noacl; |
493 | if (server->flags & NFS_MOUNT_NOACL) | |
494 | goto out_noacl; | |
495 | ||
496 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
497 | if (IS_ERR(server->client_acl)) | |
498 | goto out_noacl; | |
499 | ||
500 | /* No errors! Assume that Sun nfsacls are supported */ | |
501 | server->caps |= NFS_CAP_ACLS; | |
502 | return; | |
503 | ||
504 | out_noacl: | |
505 | server->caps &= ~NFS_CAP_ACLS; | |
506 | } | |
507 | #else | |
508 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
509 | { | |
510 | server->flags &= ~NFS_MOUNT_NOACL; | |
511 | server->caps &= ~NFS_CAP_ACLS; | |
512 | } | |
513 | #endif | |
514 | ||
515 | /* | |
516 | * Create a general RPC client | |
517 | */ | |
518 | static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t pseudoflavour) | |
519 | { | |
520 | struct nfs_client *clp = server->nfs_client; | |
521 | ||
522 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
523 | if (IS_ERR(server->client)) { | |
524 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
525 | return PTR_ERR(server->client); | |
526 | } | |
527 | ||
528 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
529 | struct rpc_auth *auth; | |
530 | ||
531 | auth = rpcauth_create(pseudoflavour, server->client); | |
532 | if (IS_ERR(auth)) { | |
533 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
534 | return PTR_ERR(auth); | |
535 | } | |
536 | } | |
537 | server->client->cl_softrtry = 0; | |
538 | if (server->flags & NFS_MOUNT_SOFT) | |
539 | server->client->cl_softrtry = 1; | |
540 | ||
541 | server->client->cl_intr = 0; | |
542 | if (server->flags & NFS4_MOUNT_INTR) | |
543 | server->client->cl_intr = 1; | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Initialise an NFS2 or NFS3 client | |
550 | */ | |
2283f8d6 TT |
551 | static int nfs_init_client(struct nfs_client *clp, |
552 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 553 | { |
54ceac45 DH |
554 | int error; |
555 | ||
556 | if (clp->cl_cons_state == NFS_CS_READY) { | |
557 | /* the client is already initialised */ | |
558 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
559 | return 0; | |
560 | } | |
561 | ||
54ceac45 DH |
562 | /* |
563 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
564 | * - RFC 2623, sec 2.3.2 | |
565 | */ | |
2283f8d6 TT |
566 | error = nfs_create_rpc_client(clp, data->nfs_server.protocol, |
567 | data->timeo, data->retrans, RPC_AUTH_UNIX, 0); | |
54ceac45 DH |
568 | if (error < 0) |
569 | goto error; | |
570 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
571 | return 0; | |
572 | ||
573 | error: | |
574 | nfs_mark_client_ready(clp, error); | |
575 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
576 | return error; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Create a version 2 or 3 client | |
581 | */ | |
2283f8d6 TT |
582 | static int nfs_init_server(struct nfs_server *server, |
583 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 584 | { |
3a498026 TM |
585 | struct nfs_client_initdata cl_init = { |
586 | .hostname = data->nfs_server.hostname, | |
587 | .addr = &data->nfs_server.address, | |
40c55319 | 588 | .rpc_ops = &nfs_v2_clientops, |
3a498026 | 589 | }; |
54ceac45 | 590 | struct nfs_client *clp; |
3a498026 | 591 | int error; |
54ceac45 DH |
592 | |
593 | dprintk("--> nfs_init_server()\n"); | |
594 | ||
595 | #ifdef CONFIG_NFS_V3 | |
596 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 597 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
598 | #endif |
599 | ||
600 | /* Allocate or find a client reference we can use */ | |
3a498026 | 601 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
602 | if (IS_ERR(clp)) { |
603 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
604 | return PTR_ERR(clp); | |
605 | } | |
606 | ||
607 | error = nfs_init_client(clp, data); | |
608 | if (error < 0) | |
609 | goto error; | |
610 | ||
611 | server->nfs_client = clp; | |
612 | ||
613 | /* Initialise the client representation from the mount data */ | |
614 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
615 | ||
616 | if (data->rsize) | |
617 | server->rsize = nfs_block_size(data->rsize, NULL); | |
618 | if (data->wsize) | |
619 | server->wsize = nfs_block_size(data->wsize, NULL); | |
620 | ||
621 | server->acregmin = data->acregmin * HZ; | |
622 | server->acregmax = data->acregmax * HZ; | |
623 | server->acdirmin = data->acdirmin * HZ; | |
624 | server->acdirmax = data->acdirmax * HZ; | |
625 | ||
626 | /* Start lockd here, before we might error out */ | |
627 | error = nfs_start_lockd(server); | |
628 | if (error < 0) | |
629 | goto error; | |
630 | ||
2283f8d6 | 631 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
632 | if (error < 0) |
633 | goto error; | |
634 | ||
635 | server->namelen = data->namlen; | |
636 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
637 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
638 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
639 | return 0; | |
640 | ||
641 | error: | |
642 | server->nfs_client = NULL; | |
643 | nfs_put_client(clp); | |
644 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
645 | return error; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Load up the server record from information gained in an fsinfo record | |
650 | */ | |
651 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
652 | { | |
653 | unsigned long max_rpc_payload; | |
654 | ||
655 | /* Work out a lot of parameters */ | |
656 | if (server->rsize == 0) | |
657 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
658 | if (server->wsize == 0) | |
659 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
660 | ||
661 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
662 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
663 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
664 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
665 | ||
666 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
667 | if (server->rsize > max_rpc_payload) | |
668 | server->rsize = max_rpc_payload; | |
669 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
670 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
671 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 672 | |
54ceac45 DH |
673 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
674 | ||
675 | if (server->wsize > max_rpc_payload) | |
676 | server->wsize = max_rpc_payload; | |
677 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
678 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
679 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
680 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
681 | ||
682 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
683 | if (server->dtsize > PAGE_CACHE_SIZE) | |
684 | server->dtsize = PAGE_CACHE_SIZE; | |
685 | if (server->dtsize > server->rsize) | |
686 | server->dtsize = server->rsize; | |
687 | ||
688 | if (server->flags & NFS_MOUNT_NOAC) { | |
689 | server->acregmin = server->acregmax = 0; | |
690 | server->acdirmin = server->acdirmax = 0; | |
691 | } | |
692 | ||
693 | server->maxfilesize = fsinfo->maxfilesize; | |
694 | ||
695 | /* We're airborne Set socket buffersize */ | |
696 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
697 | } | |
698 | ||
699 | /* | |
700 | * Probe filesystem information, including the FSID on v2/v3 | |
701 | */ | |
702 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
703 | { | |
704 | struct nfs_fsinfo fsinfo; | |
705 | struct nfs_client *clp = server->nfs_client; | |
706 | int error; | |
707 | ||
708 | dprintk("--> nfs_probe_fsinfo()\n"); | |
709 | ||
710 | if (clp->rpc_ops->set_capabilities != NULL) { | |
711 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
712 | if (error < 0) | |
713 | goto out_error; | |
714 | } | |
715 | ||
716 | fsinfo.fattr = fattr; | |
717 | nfs_fattr_init(fattr); | |
718 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
719 | if (error < 0) | |
720 | goto out_error; | |
721 | ||
722 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
723 | error = bdi_init(&server->backing_dev_info); |
724 | if (error) | |
725 | goto out_error; | |
726 | ||
54ceac45 DH |
727 | |
728 | /* Get some general file system info */ | |
729 | if (server->namelen == 0) { | |
730 | struct nfs_pathconf pathinfo; | |
731 | ||
732 | pathinfo.fattr = fattr; | |
733 | nfs_fattr_init(fattr); | |
734 | ||
735 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
736 | server->namelen = pathinfo.max_namelen; | |
737 | } | |
738 | ||
739 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
740 | return 0; | |
741 | ||
742 | out_error: | |
743 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
744 | return error; | |
745 | } | |
746 | ||
747 | /* | |
748 | * Copy useful information when duplicating a server record | |
749 | */ | |
750 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
751 | { | |
752 | target->flags = source->flags; | |
753 | target->acregmin = source->acregmin; | |
754 | target->acregmax = source->acregmax; | |
755 | target->acdirmin = source->acdirmin; | |
756 | target->acdirmax = source->acdirmax; | |
757 | target->caps = source->caps; | |
758 | } | |
759 | ||
760 | /* | |
761 | * Allocate and initialise a server record | |
762 | */ | |
763 | static struct nfs_server *nfs_alloc_server(void) | |
764 | { | |
765 | struct nfs_server *server; | |
766 | ||
767 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
768 | if (!server) | |
769 | return NULL; | |
770 | ||
771 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
772 | ||
773 | /* Zero out the NFS state stuff */ | |
774 | INIT_LIST_HEAD(&server->client_link); | |
775 | INIT_LIST_HEAD(&server->master_link); | |
776 | ||
ef818a28 SD |
777 | init_waitqueue_head(&server->active_wq); |
778 | atomic_set(&server->active, 0); | |
779 | ||
54ceac45 DH |
780 | server->io_stats = nfs_alloc_iostats(); |
781 | if (!server->io_stats) { | |
782 | kfree(server); | |
783 | return NULL; | |
784 | } | |
785 | ||
786 | return server; | |
787 | } | |
788 | ||
789 | /* | |
790 | * Free up a server record | |
791 | */ | |
792 | void nfs_free_server(struct nfs_server *server) | |
793 | { | |
794 | dprintk("--> nfs_free_server()\n"); | |
795 | ||
796 | spin_lock(&nfs_client_lock); | |
797 | list_del(&server->client_link); | |
798 | list_del(&server->master_link); | |
799 | spin_unlock(&nfs_client_lock); | |
800 | ||
801 | if (server->destroy != NULL) | |
802 | server->destroy(server); | |
5cef338b TM |
803 | |
804 | if (!IS_ERR(server->client_acl)) | |
805 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
806 | if (!IS_ERR(server->client)) |
807 | rpc_shutdown_client(server->client); | |
808 | ||
809 | nfs_put_client(server->nfs_client); | |
810 | ||
811 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 812 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
813 | kfree(server); |
814 | nfs_release_automount_timer(); | |
815 | dprintk("<-- nfs_free_server()\n"); | |
816 | } | |
817 | ||
818 | /* | |
819 | * Create a version 2 or 3 volume record | |
820 | * - keyed on server and FSID | |
821 | */ | |
2283f8d6 | 822 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
823 | struct nfs_fh *mntfh) |
824 | { | |
825 | struct nfs_server *server; | |
826 | struct nfs_fattr fattr; | |
827 | int error; | |
828 | ||
829 | server = nfs_alloc_server(); | |
830 | if (!server) | |
831 | return ERR_PTR(-ENOMEM); | |
832 | ||
833 | /* Get a client representation */ | |
834 | error = nfs_init_server(server, data); | |
835 | if (error < 0) | |
836 | goto error; | |
837 | ||
838 | BUG_ON(!server->nfs_client); | |
839 | BUG_ON(!server->nfs_client->rpc_ops); | |
840 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
841 | ||
842 | /* Probe the root fh to retrieve its FSID */ | |
843 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
844 | if (error < 0) | |
845 | goto error; | |
54af3bb5 TM |
846 | if (server->nfs_client->rpc_ops->version == 3) { |
847 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
848 | server->namelen = NFS3_MAXNAMLEN; | |
849 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
850 | server->caps |= NFS_CAP_READDIRPLUS; | |
851 | } else { | |
852 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
853 | server->namelen = NFS2_MAXNAMLEN; | |
854 | } | |
855 | ||
54ceac45 DH |
856 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
857 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
858 | if (error < 0) { | |
859 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
860 | goto error; | |
861 | } | |
862 | } | |
863 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
864 | ||
6daabf1b DH |
865 | dprintk("Server FSID: %llx:%llx\n", |
866 | (unsigned long long) server->fsid.major, | |
867 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
868 | |
869 | BUG_ON(!server->nfs_client); | |
870 | BUG_ON(!server->nfs_client->rpc_ops); | |
871 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
872 | ||
873 | spin_lock(&nfs_client_lock); | |
874 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
875 | list_add_tail(&server->master_link, &nfs_volume_list); | |
876 | spin_unlock(&nfs_client_lock); | |
877 | ||
878 | server->mount_time = jiffies; | |
879 | return server; | |
880 | ||
881 | error: | |
882 | nfs_free_server(server); | |
883 | return ERR_PTR(error); | |
884 | } | |
885 | ||
886 | #ifdef CONFIG_NFS_V4 | |
887 | /* | |
888 | * Initialise an NFS4 client record | |
889 | */ | |
890 | static int nfs4_init_client(struct nfs_client *clp, | |
891 | int proto, int timeo, int retrans, | |
7d9ac06f | 892 | const char *ip_addr, |
54ceac45 DH |
893 | rpc_authflavor_t authflavour) |
894 | { | |
895 | int error; | |
896 | ||
897 | if (clp->cl_cons_state == NFS_CS_READY) { | |
898 | /* the client is initialised already */ | |
899 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | /* Check NFS protocol revision and initialize RPC op vector */ | |
904 | clp->rpc_ops = &nfs_v4_clientops; | |
905 | ||
43d78ef2 CL |
906 | error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour, |
907 | RPC_CLNT_CREATE_DISCRTRY); | |
54ceac45 DH |
908 | if (error < 0) |
909 | goto error; | |
7d9ac06f | 910 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
911 | |
912 | error = nfs_idmap_new(clp); | |
913 | if (error < 0) { | |
914 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
915 | __FUNCTION__, error); | |
54ceac45 DH |
916 | goto error; |
917 | } | |
9c5bf38d | 918 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
919 | |
920 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
921 | return 0; | |
922 | ||
923 | error: | |
924 | nfs_mark_client_ready(clp, error); | |
925 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
926 | return error; | |
927 | } | |
928 | ||
929 | /* | |
930 | * Set up an NFS4 client | |
931 | */ | |
932 | static int nfs4_set_client(struct nfs_server *server, | |
933 | const char *hostname, const struct sockaddr_in *addr, | |
7d9ac06f | 934 | const char *ip_addr, |
54ceac45 DH |
935 | rpc_authflavor_t authflavour, |
936 | int proto, int timeo, int retrans) | |
937 | { | |
3a498026 TM |
938 | struct nfs_client_initdata cl_init = { |
939 | .hostname = hostname, | |
940 | .addr = addr, | |
40c55319 | 941 | .rpc_ops = &nfs_v4_clientops, |
3a498026 | 942 | }; |
54ceac45 DH |
943 | struct nfs_client *clp; |
944 | int error; | |
945 | ||
946 | dprintk("--> nfs4_set_client()\n"); | |
947 | ||
948 | /* Allocate or find a client reference we can use */ | |
3a498026 | 949 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
950 | if (IS_ERR(clp)) { |
951 | error = PTR_ERR(clp); | |
952 | goto error; | |
953 | } | |
7d9ac06f | 954 | error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour); |
54ceac45 DH |
955 | if (error < 0) |
956 | goto error_put; | |
957 | ||
958 | server->nfs_client = clp; | |
959 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
960 | return 0; | |
961 | ||
962 | error_put: | |
963 | nfs_put_client(clp); | |
964 | error: | |
965 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
966 | return error; | |
967 | } | |
968 | ||
969 | /* | |
970 | * Create a version 4 volume record | |
971 | */ | |
972 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 973 | const struct nfs_parsed_mount_data *data) |
54ceac45 DH |
974 | { |
975 | int error; | |
976 | ||
977 | dprintk("--> nfs4_init_server()\n"); | |
978 | ||
979 | /* Initialise the client representation from the mount data */ | |
980 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
981 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
982 | ||
983 | if (data->rsize) | |
984 | server->rsize = nfs_block_size(data->rsize, NULL); | |
985 | if (data->wsize) | |
986 | server->wsize = nfs_block_size(data->wsize, NULL); | |
987 | ||
988 | server->acregmin = data->acregmin * HZ; | |
989 | server->acregmax = data->acregmax * HZ; | |
990 | server->acdirmin = data->acdirmin * HZ; | |
991 | server->acdirmax = data->acdirmax * HZ; | |
992 | ||
91ea40b9 | 993 | error = nfs_init_server_rpcclient(server, data->auth_flavors[0]); |
54ceac45 DH |
994 | |
995 | /* Done */ | |
996 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
997 | return error; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Create a version 4 volume record | |
1002 | * - keyed on server and FSID | |
1003 | */ | |
91ea40b9 | 1004 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1005 | struct nfs_fh *mntfh) |
1006 | { | |
1007 | struct nfs_fattr fattr; | |
1008 | struct nfs_server *server; | |
1009 | int error; | |
1010 | ||
1011 | dprintk("--> nfs4_create_server()\n"); | |
1012 | ||
1013 | server = nfs_alloc_server(); | |
1014 | if (!server) | |
1015 | return ERR_PTR(-ENOMEM); | |
1016 | ||
1017 | /* Get a client record */ | |
91ea40b9 TT |
1018 | error = nfs4_set_client(server, |
1019 | data->nfs_server.hostname, | |
1020 | &data->nfs_server.address, | |
1021 | data->client_address, | |
1022 | data->auth_flavors[0], | |
1023 | data->nfs_server.protocol, | |
1024 | data->timeo, data->retrans); | |
54ceac45 DH |
1025 | if (error < 0) |
1026 | goto error; | |
1027 | ||
1028 | /* set up the general RPC client */ | |
91ea40b9 | 1029 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1030 | if (error < 0) |
1031 | goto error; | |
1032 | ||
1033 | BUG_ON(!server->nfs_client); | |
1034 | BUG_ON(!server->nfs_client->rpc_ops); | |
1035 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1036 | ||
1037 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1038 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1039 | if (error < 0) |
1040 | goto error; | |
1041 | ||
6daabf1b DH |
1042 | dprintk("Server FSID: %llx:%llx\n", |
1043 | (unsigned long long) server->fsid.major, | |
1044 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1045 | dprintk("Mount FH: %d\n", mntfh->size); |
1046 | ||
1047 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1048 | if (error < 0) | |
1049 | goto error; | |
1050 | ||
54af3bb5 TM |
1051 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1052 | server->namelen = NFS4_MAXNAMLEN; | |
1053 | ||
54ceac45 DH |
1054 | BUG_ON(!server->nfs_client); |
1055 | BUG_ON(!server->nfs_client->rpc_ops); | |
1056 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1057 | ||
1058 | spin_lock(&nfs_client_lock); | |
1059 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1060 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1061 | spin_unlock(&nfs_client_lock); | |
1062 | ||
1063 | server->mount_time = jiffies; | |
1064 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1065 | return server; | |
1066 | ||
1067 | error: | |
1068 | nfs_free_server(server); | |
1069 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1070 | return ERR_PTR(error); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Create an NFS4 referral server record | |
1075 | */ | |
1076 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1077 | struct nfs_fh *mntfh) |
54ceac45 DH |
1078 | { |
1079 | struct nfs_client *parent_client; | |
1080 | struct nfs_server *server, *parent_server; | |
1081 | struct nfs_fattr fattr; | |
1082 | int error; | |
1083 | ||
1084 | dprintk("--> nfs4_create_referral_server()\n"); | |
1085 | ||
1086 | server = nfs_alloc_server(); | |
1087 | if (!server) | |
1088 | return ERR_PTR(-ENOMEM); | |
1089 | ||
1090 | parent_server = NFS_SB(data->sb); | |
1091 | parent_client = parent_server->nfs_client; | |
1092 | ||
1093 | /* Get a client representation. | |
1094 | * Note: NFSv4 always uses TCP, */ | |
1095 | error = nfs4_set_client(server, data->hostname, data->addr, | |
7d9ac06f | 1096 | parent_client->cl_ipaddr, |
54ceac45 DH |
1097 | data->authflavor, |
1098 | parent_server->client->cl_xprt->prot, | |
1099 | parent_client->retrans_timeo, | |
1100 | parent_client->retrans_count); | |
297de4f6 | 1101 | if (error < 0) |
1102 | goto error; | |
54ceac45 DH |
1103 | |
1104 | /* Initialise the client representation from the parent server */ | |
1105 | nfs_server_copy_userdata(server, parent_server); | |
1106 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1107 | ||
1108 | error = nfs_init_server_rpcclient(server, data->authflavor); | |
1109 | if (error < 0) | |
1110 | goto error; | |
1111 | ||
1112 | BUG_ON(!server->nfs_client); | |
1113 | BUG_ON(!server->nfs_client->rpc_ops); | |
1114 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1115 | ||
f2d0d85e TM |
1116 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1117 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1118 | if (error < 0) | |
1119 | goto error; | |
1120 | ||
54ceac45 | 1121 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1122 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1123 | if (error < 0) |
1124 | goto error; | |
1125 | ||
54af3bb5 TM |
1126 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1127 | server->namelen = NFS4_MAXNAMLEN; | |
1128 | ||
54ceac45 | 1129 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1130 | (unsigned long long) server->fsid.major, |
1131 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1132 | |
1133 | spin_lock(&nfs_client_lock); | |
1134 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1135 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1136 | spin_unlock(&nfs_client_lock); | |
1137 | ||
1138 | server->mount_time = jiffies; | |
1139 | ||
1140 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1141 | return server; | |
1142 | ||
1143 | error: | |
1144 | nfs_free_server(server); | |
1145 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1146 | return ERR_PTR(error); | |
1147 | } | |
1148 | ||
1149 | #endif /* CONFIG_NFS_V4 */ | |
1150 | ||
1151 | /* | |
1152 | * Clone an NFS2, NFS3 or NFS4 server record | |
1153 | */ | |
1154 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1155 | struct nfs_fh *fh, | |
1156 | struct nfs_fattr *fattr) | |
1157 | { | |
1158 | struct nfs_server *server; | |
1159 | struct nfs_fattr fattr_fsinfo; | |
1160 | int error; | |
1161 | ||
1162 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1163 | (unsigned long long) fattr->fsid.major, |
1164 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1165 | |
1166 | server = nfs_alloc_server(); | |
1167 | if (!server) | |
1168 | return ERR_PTR(-ENOMEM); | |
1169 | ||
1170 | /* Copy data from the source */ | |
1171 | server->nfs_client = source->nfs_client; | |
1172 | atomic_inc(&server->nfs_client->cl_count); | |
1173 | nfs_server_copy_userdata(server, source); | |
1174 | ||
1175 | server->fsid = fattr->fsid; | |
1176 | ||
1177 | error = nfs_init_server_rpcclient(server, source->client->cl_auth->au_flavor); | |
1178 | if (error < 0) | |
1179 | goto out_free_server; | |
1180 | if (!IS_ERR(source->client_acl)) | |
1181 | nfs_init_server_aclclient(server); | |
1182 | ||
1183 | /* probe the filesystem info for this server filesystem */ | |
1184 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1185 | if (error < 0) | |
1186 | goto out_free_server; | |
1187 | ||
54af3bb5 TM |
1188 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1189 | server->namelen = NFS4_MAXNAMLEN; | |
1190 | ||
54ceac45 | 1191 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1192 | (unsigned long long) server->fsid.major, |
1193 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1194 | |
1195 | error = nfs_start_lockd(server); | |
1196 | if (error < 0) | |
1197 | goto out_free_server; | |
1198 | ||
1199 | spin_lock(&nfs_client_lock); | |
1200 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1201 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1202 | spin_unlock(&nfs_client_lock); | |
1203 | ||
1204 | server->mount_time = jiffies; | |
1205 | ||
1206 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1207 | return server; | |
1208 | ||
1209 | out_free_server: | |
1210 | nfs_free_server(server); | |
1211 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1212 | return ERR_PTR(error); | |
1213 | } | |
6aaca566 DH |
1214 | |
1215 | #ifdef CONFIG_PROC_FS | |
1216 | static struct proc_dir_entry *proc_fs_nfs; | |
1217 | ||
1218 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1219 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1220 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1221 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1222 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1223 | ||
1224 | static struct seq_operations nfs_server_list_ops = { | |
1225 | .start = nfs_server_list_start, | |
1226 | .next = nfs_server_list_next, | |
1227 | .stop = nfs_server_list_stop, | |
1228 | .show = nfs_server_list_show, | |
1229 | }; | |
1230 | ||
00977a59 | 1231 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1232 | .open = nfs_server_list_open, |
1233 | .read = seq_read, | |
1234 | .llseek = seq_lseek, | |
1235 | .release = seq_release, | |
1236 | }; | |
1237 | ||
1238 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1239 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1240 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1241 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1242 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1243 | ||
1244 | static struct seq_operations nfs_volume_list_ops = { | |
1245 | .start = nfs_volume_list_start, | |
1246 | .next = nfs_volume_list_next, | |
1247 | .stop = nfs_volume_list_stop, | |
1248 | .show = nfs_volume_list_show, | |
1249 | }; | |
1250 | ||
00977a59 | 1251 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1252 | .open = nfs_volume_list_open, |
1253 | .read = seq_read, | |
1254 | .llseek = seq_lseek, | |
1255 | .release = seq_release, | |
1256 | }; | |
1257 | ||
1258 | /* | |
1259 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1260 | * we're dealing | |
1261 | */ | |
1262 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1263 | { | |
1264 | struct seq_file *m; | |
1265 | int ret; | |
1266 | ||
1267 | ret = seq_open(file, &nfs_server_list_ops); | |
1268 | if (ret < 0) | |
1269 | return ret; | |
1270 | ||
1271 | m = file->private_data; | |
1272 | m->private = PDE(inode)->data; | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * set up the iterator to start reading from the server list and return the first item | |
1279 | */ | |
1280 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1281 | { | |
6aaca566 DH |
1282 | /* lock the list against modification */ |
1283 | spin_lock(&nfs_client_lock); | |
259902ea | 1284 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1285 | } |
1286 | ||
1287 | /* | |
1288 | * move to next server | |
1289 | */ | |
1290 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1291 | { | |
259902ea | 1292 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1293 | } |
1294 | ||
1295 | /* | |
1296 | * clean up after reading from the transports list | |
1297 | */ | |
1298 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1299 | { | |
1300 | spin_unlock(&nfs_client_lock); | |
1301 | } | |
1302 | ||
1303 | /* | |
1304 | * display a header line followed by a load of call lines | |
1305 | */ | |
1306 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1307 | { | |
1308 | struct nfs_client *clp; | |
1309 | ||
1310 | /* display header on line 1 */ | |
259902ea | 1311 | if (v == &nfs_client_list) { |
6aaca566 DH |
1312 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | /* display one transport per line on subsequent lines */ | |
1317 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1318 | ||
5d8515ca | 1319 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1320 | clp->rpc_ops->version, |
5d8515ca CL |
1321 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1322 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1323 | atomic_read(&clp->cl_count), |
1324 | clp->cl_hostname); | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1331 | */ | |
1332 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1333 | { | |
1334 | struct seq_file *m; | |
1335 | int ret; | |
1336 | ||
1337 | ret = seq_open(file, &nfs_volume_list_ops); | |
1338 | if (ret < 0) | |
1339 | return ret; | |
1340 | ||
1341 | m = file->private_data; | |
1342 | m->private = PDE(inode)->data; | |
1343 | ||
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * set up the iterator to start reading from the volume list and return the first item | |
1349 | */ | |
1350 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1351 | { | |
6aaca566 DH |
1352 | /* lock the list against modification */ |
1353 | spin_lock(&nfs_client_lock); | |
259902ea | 1354 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1355 | } |
1356 | ||
1357 | /* | |
1358 | * move to next volume | |
1359 | */ | |
1360 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1361 | { | |
259902ea | 1362 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1363 | } |
1364 | ||
1365 | /* | |
1366 | * clean up after reading from the transports list | |
1367 | */ | |
1368 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1369 | { | |
1370 | spin_unlock(&nfs_client_lock); | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * display a header line followed by a load of call lines | |
1375 | */ | |
1376 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1377 | { | |
1378 | struct nfs_server *server; | |
1379 | struct nfs_client *clp; | |
1380 | char dev[8], fsid[17]; | |
1381 | ||
1382 | /* display header on line 1 */ | |
259902ea | 1383 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1384 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1385 | return 0; | |
1386 | } | |
1387 | /* display one transport per line on subsequent lines */ | |
1388 | server = list_entry(v, struct nfs_server, master_link); | |
1389 | clp = server->nfs_client; | |
1390 | ||
1391 | snprintf(dev, 8, "%u:%u", | |
1392 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1393 | ||
1394 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1395 | (unsigned long long) server->fsid.major, |
1396 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1397 | |
5d8515ca | 1398 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1399 | clp->rpc_ops->version, |
5d8515ca CL |
1400 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1401 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1402 | dev, |
1403 | fsid); | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * initialise the /proc/fs/nfsfs/ directory | |
1410 | */ | |
1411 | int __init nfs_fs_proc_init(void) | |
1412 | { | |
1413 | struct proc_dir_entry *p; | |
1414 | ||
1415 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1416 | if (!proc_fs_nfs) | |
1417 | goto error_0; | |
1418 | ||
1419 | proc_fs_nfs->owner = THIS_MODULE; | |
1420 | ||
1421 | /* a file of servers with which we're dealing */ | |
1422 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1423 | if (!p) | |
1424 | goto error_1; | |
1425 | ||
1426 | p->proc_fops = &nfs_server_list_fops; | |
1427 | p->owner = THIS_MODULE; | |
1428 | ||
1429 | /* a file of volumes that we have mounted */ | |
1430 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1431 | if (!p) | |
1432 | goto error_2; | |
1433 | ||
1434 | p->proc_fops = &nfs_volume_list_fops; | |
1435 | p->owner = THIS_MODULE; | |
1436 | return 0; | |
1437 | ||
1438 | error_2: | |
1439 | remove_proc_entry("servers", proc_fs_nfs); | |
1440 | error_1: | |
1441 | remove_proc_entry("nfsfs", proc_root_fs); | |
1442 | error_0: | |
1443 | return -ENOMEM; | |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | * clean up the /proc/fs/nfsfs/ directory | |
1448 | */ | |
1449 | void nfs_fs_proc_exit(void) | |
1450 | { | |
1451 | remove_proc_entry("volumes", proc_fs_nfs); | |
1452 | remove_proc_entry("servers", proc_fs_nfs); | |
1453 | remove_proc_entry("nfsfs", proc_root_fs); | |
1454 | } | |
1455 | ||
1456 | #endif /* CONFIG_PROC_FS */ |