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; | |
d7422c47 | 100 | const struct sockaddr *addr; |
6e4cffd7 | 101 | size_t addrlen; |
40c55319 | 102 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 103 | int proto; |
3a498026 TM |
104 | }; |
105 | ||
24c8dbbb DH |
106 | /* |
107 | * Allocate a shared client record | |
108 | * | |
109 | * Since these are allocated/deallocated very rarely, we don't | |
110 | * bother putting them in a slab cache... | |
111 | */ | |
3a498026 | 112 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
113 | { |
114 | struct nfs_client *clp; | |
7c67db3a | 115 | struct rpc_cred *cred; |
24c8dbbb DH |
116 | |
117 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
118 | goto error_0; | |
119 | ||
40c55319 TM |
120 | clp->rpc_ops = cl_init->rpc_ops; |
121 | ||
122 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
123 | if (nfs_callback_up() < 0) |
124 | goto error_2; | |
125 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
126 | } | |
127 | ||
128 | atomic_set(&clp->cl_count, 1); | |
129 | clp->cl_cons_state = NFS_CS_INITING; | |
130 | ||
6e4cffd7 CL |
131 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
132 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 133 | |
3a498026 TM |
134 | if (cl_init->hostname) { |
135 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
136 | if (!clp->cl_hostname) |
137 | goto error_3; | |
138 | } | |
139 | ||
140 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
141 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
142 | ||
59dca3b2 TM |
143 | clp->cl_proto = cl_init->proto; |
144 | ||
24c8dbbb DH |
145 | #ifdef CONFIG_NFS_V4 |
146 | init_rwsem(&clp->cl_sem); | |
147 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 148 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 149 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
150 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
151 | clp->cl_boot_time = CURRENT_TIME; | |
152 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
153 | #endif | |
7c67db3a TM |
154 | cred = rpc_lookup_machine_cred(); |
155 | if (!IS_ERR(cred)) | |
156 | clp->cl_machine_cred = cred; | |
24c8dbbb DH |
157 | |
158 | return clp; | |
159 | ||
160 | error_3: | |
9c5bf38d TM |
161 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
162 | nfs_callback_down(); | |
24c8dbbb | 163 | error_2: |
24c8dbbb DH |
164 | kfree(clp); |
165 | error_0: | |
166 | return NULL; | |
167 | } | |
168 | ||
5dd3177a TM |
169 | static void nfs4_shutdown_client(struct nfs_client *clp) |
170 | { | |
171 | #ifdef CONFIG_NFS_V4 | |
172 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
173 | nfs4_kill_renewd(clp); | |
9f958ab8 | 174 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
175 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
176 | nfs_idmap_delete(clp); | |
f6a1cc89 TM |
177 | |
178 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
5dd3177a TM |
179 | #endif |
180 | } | |
181 | ||
24c8dbbb DH |
182 | /* |
183 | * Destroy a shared client record | |
184 | */ | |
185 | static void nfs_free_client(struct nfs_client *clp) | |
186 | { | |
40c55319 | 187 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 188 | |
5dd3177a | 189 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
190 | |
191 | /* -EIO all pending I/O */ | |
192 | if (!IS_ERR(clp->cl_rpcclient)) | |
193 | rpc_shutdown_client(clp->cl_rpcclient); | |
194 | ||
195 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
196 | nfs_callback_down(); | |
197 | ||
7c67db3a TM |
198 | if (clp->cl_machine_cred != NULL) |
199 | put_rpccred(clp->cl_machine_cred); | |
200 | ||
24c8dbbb DH |
201 | kfree(clp->cl_hostname); |
202 | kfree(clp); | |
203 | ||
204 | dprintk("<-- nfs_free_client()\n"); | |
205 | } | |
206 | ||
207 | /* | |
208 | * Release a reference to a shared client record | |
209 | */ | |
210 | void nfs_put_client(struct nfs_client *clp) | |
211 | { | |
27ba8512 DH |
212 | if (!clp) |
213 | return; | |
214 | ||
24c8dbbb DH |
215 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
216 | ||
217 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
218 | list_del(&clp->cl_share_link); | |
219 | spin_unlock(&nfs_client_lock); | |
220 | ||
221 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
222 | ||
223 | nfs_free_client(clp); | |
224 | } | |
225 | } | |
226 | ||
3b0d3f93 TM |
227 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, |
228 | const struct sockaddr_in *sa2) | |
229 | { | |
230 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
231 | } | |
232 | ||
233 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1, | |
234 | const struct sockaddr_in6 *sa2) | |
235 | { | |
236 | return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr); | |
237 | } | |
238 | ||
239 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
240 | const struct sockaddr *sa2) | |
241 | { | |
242 | switch (sa1->sa_family) { | |
243 | case AF_INET: | |
244 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
245 | (const struct sockaddr_in *)sa2); | |
246 | case AF_INET6: | |
247 | return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1, | |
248 | (const struct sockaddr_in6 *)sa2); | |
249 | } | |
250 | BUG(); | |
251 | } | |
252 | ||
24c8dbbb | 253 | /* |
c81468a1 TM |
254 | * Find a client by IP address and protocol version |
255 | * - returns NULL if no such client | |
24c8dbbb | 256 | */ |
ff052645 | 257 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
258 | { |
259 | struct nfs_client *clp; | |
260 | ||
c81468a1 | 261 | spin_lock(&nfs_client_lock); |
24c8dbbb | 262 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
263 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
264 | ||
13bbc06a | 265 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 266 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
267 | continue; |
268 | ||
24c8dbbb | 269 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 270 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
271 | continue; |
272 | ||
3b0d3f93 TM |
273 | if (addr->sa_family != clap->sa_family) |
274 | continue; | |
c81468a1 | 275 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 276 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
277 | continue; |
278 | ||
c81468a1 TM |
279 | atomic_inc(&clp->cl_count); |
280 | spin_unlock(&nfs_client_lock); | |
281 | return clp; | |
24c8dbbb | 282 | } |
c81468a1 | 283 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 284 | return NULL; |
24c8dbbb DH |
285 | } |
286 | ||
3fbd67ad TM |
287 | /* |
288 | * Find a client by IP address and protocol version | |
289 | * - returns NULL if no such client | |
290 | */ | |
291 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
292 | { | |
293 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
294 | u32 nfsvers = clp->rpc_ops->version; | |
295 | ||
296 | spin_lock(&nfs_client_lock); | |
297 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
298 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
299 | ||
300 | /* Don't match clients that failed to initialise properly */ | |
301 | if (clp->cl_cons_state != NFS_CS_READY) | |
302 | continue; | |
303 | ||
304 | /* Different NFS versions cannot share the same nfs_client */ | |
305 | if (clp->rpc_ops->version != nfsvers) | |
306 | continue; | |
307 | ||
308 | if (sap->sa_family != clap->sa_family) | |
309 | continue; | |
310 | /* Match only the IP address, not the port number */ | |
311 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
312 | continue; | |
313 | ||
314 | atomic_inc(&clp->cl_count); | |
315 | spin_unlock(&nfs_client_lock); | |
316 | return clp; | |
317 | } | |
318 | spin_unlock(&nfs_client_lock); | |
319 | return NULL; | |
320 | } | |
321 | ||
24c8dbbb | 322 | /* |
c81468a1 TM |
323 | * Find an nfs_client on the list that matches the initialisation data |
324 | * that is supplied. | |
24c8dbbb | 325 | */ |
c81468a1 | 326 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
327 | { |
328 | struct nfs_client *clp; | |
329 | ||
c81468a1 TM |
330 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
331 | /* Don't match clients that failed to initialise properly */ | |
332 | if (clp->cl_cons_state < 0) | |
333 | continue; | |
334 | ||
335 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 336 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
337 | continue; |
338 | ||
59dca3b2 TM |
339 | if (clp->cl_proto != data->proto) |
340 | continue; | |
341 | ||
c81468a1 TM |
342 | /* Match the full socket address */ |
343 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
344 | continue; | |
345 | ||
346 | atomic_inc(&clp->cl_count); | |
347 | return clp; | |
13bbc06a | 348 | } |
c81468a1 | 349 | return NULL; |
24c8dbbb DH |
350 | } |
351 | ||
352 | /* | |
353 | * Look up a client by IP address and protocol version | |
354 | * - creates a new record if one doesn't yet exist | |
355 | */ | |
3a498026 | 356 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
357 | { |
358 | struct nfs_client *clp, *new = NULL; | |
359 | int error; | |
360 | ||
d7422c47 CL |
361 | dprintk("--> nfs_get_client(%s,v%u)\n", |
362 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
363 | |
364 | /* see if the client already exists */ | |
365 | do { | |
366 | spin_lock(&nfs_client_lock); | |
367 | ||
c81468a1 | 368 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
369 | if (clp) |
370 | goto found_client; | |
371 | if (new) | |
372 | goto install_client; | |
373 | ||
374 | spin_unlock(&nfs_client_lock); | |
375 | ||
3a498026 | 376 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
377 | } while (new); |
378 | ||
379 | return ERR_PTR(-ENOMEM); | |
380 | ||
381 | /* install a new client and return with it unready */ | |
382 | install_client: | |
383 | clp = new; | |
384 | list_add(&clp->cl_share_link, &nfs_client_list); | |
385 | spin_unlock(&nfs_client_lock); | |
386 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
387 | return clp; | |
388 | ||
389 | /* found an existing client | |
390 | * - make sure it's ready before returning | |
391 | */ | |
392 | found_client: | |
393 | spin_unlock(&nfs_client_lock); | |
394 | ||
395 | if (new) | |
396 | nfs_free_client(new); | |
397 | ||
150030b7 | 398 | error = wait_event_killable(nfs_client_active_wq, |
0bae89ec TM |
399 | clp->cl_cons_state != NFS_CS_INITING); |
400 | if (error < 0) { | |
401 | nfs_put_client(clp); | |
402 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
403 | } |
404 | ||
405 | if (clp->cl_cons_state < NFS_CS_READY) { | |
406 | error = clp->cl_cons_state; | |
407 | nfs_put_client(clp); | |
408 | return ERR_PTR(error); | |
409 | } | |
410 | ||
54ceac45 DH |
411 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
412 | ||
24c8dbbb DH |
413 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
414 | return clp; | |
415 | } | |
416 | ||
417 | /* | |
418 | * Mark a server as ready or failed | |
419 | */ | |
54ceac45 | 420 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
421 | { |
422 | clp->cl_cons_state = state; | |
423 | wake_up_all(&nfs_client_active_wq); | |
424 | } | |
5006a76c DH |
425 | |
426 | /* | |
427 | * Initialise the timeout values for a connection | |
428 | */ | |
429 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
430 | unsigned int timeo, unsigned int retrans) | |
431 | { | |
432 | to->to_initval = timeo * HZ / 10; | |
433 | to->to_retries = retrans; | |
5006a76c DH |
434 | |
435 | switch (proto) { | |
0896a725 | 436 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 437 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
438 | if (to->to_retries == 0) |
439 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 440 | if (to->to_initval == 0) |
259875ef | 441 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
442 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
443 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
444 | to->to_increment = to->to_initval; | |
445 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
446 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
447 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
448 | if (to->to_maxval < to->to_initval) | |
449 | to->to_maxval = to->to_initval; | |
5006a76c DH |
450 | to->to_exponential = 0; |
451 | break; | |
0896a725 | 452 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
453 | if (to->to_retries == 0) |
454 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 455 | if (!to->to_initval) |
259875ef | 456 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
457 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
458 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
459 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
460 | to->to_exponential = 1; | |
461 | break; | |
259875ef TM |
462 | default: |
463 | BUG(); | |
5006a76c DH |
464 | } |
465 | } | |
466 | ||
467 | /* | |
468 | * Create an RPC client handle | |
469 | */ | |
59dca3b2 | 470 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
471 | const struct rpc_timeout *timeparms, |
472 | rpc_authflavor_t flavor, | |
473 | int flags) | |
5006a76c | 474 | { |
5006a76c | 475 | struct rpc_clnt *clnt = NULL; |
41877d20 | 476 | struct rpc_create_args args = { |
59dca3b2 | 477 | .protocol = clp->cl_proto, |
41877d20 | 478 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 479 | .addrsize = clp->cl_addrlen, |
33170233 | 480 | .timeout = timeparms, |
41877d20 CL |
481 | .servername = clp->cl_hostname, |
482 | .program = &nfs_program, | |
483 | .version = clp->rpc_ops->version, | |
484 | .authflavor = flavor, | |
43d78ef2 | 485 | .flags = flags, |
41877d20 | 486 | }; |
5006a76c DH |
487 | |
488 | if (!IS_ERR(clp->cl_rpcclient)) | |
489 | return 0; | |
490 | ||
41877d20 | 491 | clnt = rpc_create(&args); |
5006a76c DH |
492 | if (IS_ERR(clnt)) { |
493 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 494 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
495 | return PTR_ERR(clnt); |
496 | } | |
497 | ||
5006a76c DH |
498 | clp->cl_rpcclient = clnt; |
499 | return 0; | |
500 | } | |
54ceac45 DH |
501 | |
502 | /* | |
503 | * Version 2 or 3 client destruction | |
504 | */ | |
505 | static void nfs_destroy_server(struct nfs_server *server) | |
506 | { | |
54ceac45 | 507 | if (!(server->flags & NFS_MOUNT_NONLM)) |
9289e7f9 | 508 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
509 | } |
510 | ||
511 | /* | |
512 | * Version 2 or 3 lockd setup | |
513 | */ | |
514 | static int nfs_start_lockd(struct nfs_server *server) | |
515 | { | |
9289e7f9 CL |
516 | struct nlm_host *host; |
517 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
518 | struct nlmclnt_initdata nlm_init = { |
519 | .hostname = clp->cl_hostname, | |
520 | .address = (struct sockaddr *)&clp->cl_addr, | |
521 | .addrlen = clp->cl_addrlen, | |
522 | .protocol = server->flags & NFS_MOUNT_TCP ? | |
523 | IPPROTO_TCP : IPPROTO_UDP, | |
524 | .nfs_version = clp->rpc_ops->version, | |
525 | }; | |
54ceac45 | 526 | |
883bb163 | 527 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 528 | return 0; |
54ceac45 | 529 | if (server->flags & NFS_MOUNT_NONLM) |
9289e7f9 CL |
530 | return 0; |
531 | ||
883bb163 | 532 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
533 | if (IS_ERR(host)) |
534 | return PTR_ERR(host); | |
535 | ||
536 | server->nlm_host = host; | |
537 | server->destroy = nfs_destroy_server; | |
538 | return 0; | |
54ceac45 DH |
539 | } |
540 | ||
541 | /* | |
542 | * Initialise an NFSv3 ACL client connection | |
543 | */ | |
544 | #ifdef CONFIG_NFS_V3_ACL | |
545 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
546 | { | |
40c55319 | 547 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
548 | goto out_noacl; |
549 | if (server->flags & NFS_MOUNT_NOACL) | |
550 | goto out_noacl; | |
551 | ||
552 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
553 | if (IS_ERR(server->client_acl)) | |
554 | goto out_noacl; | |
555 | ||
556 | /* No errors! Assume that Sun nfsacls are supported */ | |
557 | server->caps |= NFS_CAP_ACLS; | |
558 | return; | |
559 | ||
560 | out_noacl: | |
561 | server->caps &= ~NFS_CAP_ACLS; | |
562 | } | |
563 | #else | |
564 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
565 | { | |
566 | server->flags &= ~NFS_MOUNT_NOACL; | |
567 | server->caps &= ~NFS_CAP_ACLS; | |
568 | } | |
569 | #endif | |
570 | ||
571 | /* | |
572 | * Create a general RPC client | |
573 | */ | |
33170233 TM |
574 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
575 | const struct rpc_timeout *timeo, | |
576 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
577 | { |
578 | struct nfs_client *clp = server->nfs_client; | |
579 | ||
580 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
581 | if (IS_ERR(server->client)) { | |
3110ff80 | 582 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
583 | return PTR_ERR(server->client); |
584 | } | |
585 | ||
33170233 TM |
586 | memcpy(&server->client->cl_timeout_default, |
587 | timeo, | |
588 | sizeof(server->client->cl_timeout_default)); | |
589 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
590 | ||
54ceac45 DH |
591 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
592 | struct rpc_auth *auth; | |
593 | ||
594 | auth = rpcauth_create(pseudoflavour, server->client); | |
595 | if (IS_ERR(auth)) { | |
3110ff80 | 596 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
597 | return PTR_ERR(auth); |
598 | } | |
599 | } | |
600 | server->client->cl_softrtry = 0; | |
601 | if (server->flags & NFS_MOUNT_SOFT) | |
602 | server->client->cl_softrtry = 1; | |
603 | ||
54ceac45 DH |
604 | return 0; |
605 | } | |
606 | ||
607 | /* | |
608 | * Initialise an NFS2 or NFS3 client | |
609 | */ | |
2283f8d6 | 610 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 611 | const struct rpc_timeout *timeparms, |
2283f8d6 | 612 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 613 | { |
54ceac45 DH |
614 | int error; |
615 | ||
616 | if (clp->cl_cons_state == NFS_CS_READY) { | |
617 | /* the client is already initialised */ | |
618 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
619 | return 0; | |
620 | } | |
621 | ||
54ceac45 DH |
622 | /* |
623 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
624 | * - RFC 2623, sec 2.3.2 | |
625 | */ | |
59dca3b2 | 626 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, 0); |
54ceac45 DH |
627 | if (error < 0) |
628 | goto error; | |
629 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
630 | return 0; | |
631 | ||
632 | error: | |
633 | nfs_mark_client_ready(clp, error); | |
634 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
635 | return error; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Create a version 2 or 3 client | |
640 | */ | |
2283f8d6 TT |
641 | static int nfs_init_server(struct nfs_server *server, |
642 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 643 | { |
3a498026 TM |
644 | struct nfs_client_initdata cl_init = { |
645 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 646 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 647 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 648 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 649 | .proto = data->nfs_server.protocol, |
3a498026 | 650 | }; |
33170233 | 651 | struct rpc_timeout timeparms; |
54ceac45 | 652 | struct nfs_client *clp; |
3a498026 | 653 | int error; |
54ceac45 DH |
654 | |
655 | dprintk("--> nfs_init_server()\n"); | |
656 | ||
657 | #ifdef CONFIG_NFS_V3 | |
658 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 659 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
660 | #endif |
661 | ||
662 | /* Allocate or find a client reference we can use */ | |
3a498026 | 663 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
664 | if (IS_ERR(clp)) { |
665 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
666 | return PTR_ERR(clp); | |
667 | } | |
668 | ||
33170233 TM |
669 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
670 | data->timeo, data->retrans); | |
671 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
672 | if (error < 0) |
673 | goto error; | |
674 | ||
675 | server->nfs_client = clp; | |
676 | ||
677 | /* Initialise the client representation from the mount data */ | |
678 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
679 | ||
680 | if (data->rsize) | |
681 | server->rsize = nfs_block_size(data->rsize, NULL); | |
682 | if (data->wsize) | |
683 | server->wsize = nfs_block_size(data->wsize, NULL); | |
684 | ||
685 | server->acregmin = data->acregmin * HZ; | |
686 | server->acregmax = data->acregmax * HZ; | |
687 | server->acdirmin = data->acdirmin * HZ; | |
688 | server->acdirmax = data->acdirmax * HZ; | |
689 | ||
690 | /* Start lockd here, before we might error out */ | |
691 | error = nfs_start_lockd(server); | |
692 | if (error < 0) | |
693 | goto error; | |
694 | ||
f22d6d79 CL |
695 | server->port = data->nfs_server.port; |
696 | ||
33170233 | 697 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
698 | if (error < 0) |
699 | goto error; | |
700 | ||
3f8400d1 CL |
701 | /* Preserve the values of mount_server-related mount options */ |
702 | if (data->mount_server.addrlen) { | |
703 | memcpy(&server->mountd_address, &data->mount_server.address, | |
704 | data->mount_server.addrlen); | |
705 | server->mountd_addrlen = data->mount_server.addrlen; | |
706 | } | |
707 | server->mountd_version = data->mount_server.version; | |
708 | server->mountd_port = data->mount_server.port; | |
709 | server->mountd_protocol = data->mount_server.protocol; | |
710 | ||
54ceac45 DH |
711 | server->namelen = data->namlen; |
712 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
713 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
714 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
715 | return 0; | |
716 | ||
717 | error: | |
718 | server->nfs_client = NULL; | |
719 | nfs_put_client(clp); | |
720 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
721 | return error; | |
722 | } | |
723 | ||
724 | /* | |
725 | * Load up the server record from information gained in an fsinfo record | |
726 | */ | |
727 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
728 | { | |
729 | unsigned long max_rpc_payload; | |
730 | ||
731 | /* Work out a lot of parameters */ | |
732 | if (server->rsize == 0) | |
733 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
734 | if (server->wsize == 0) | |
735 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
736 | ||
737 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
738 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
739 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
740 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
741 | ||
742 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
743 | if (server->rsize > max_rpc_payload) | |
744 | server->rsize = max_rpc_payload; | |
745 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
746 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
747 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 748 | |
54ceac45 DH |
749 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
750 | ||
751 | if (server->wsize > max_rpc_payload) | |
752 | server->wsize = max_rpc_payload; | |
753 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
754 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
755 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
756 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
757 | ||
758 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
759 | if (server->dtsize > PAGE_CACHE_SIZE) | |
760 | server->dtsize = PAGE_CACHE_SIZE; | |
761 | if (server->dtsize > server->rsize) | |
762 | server->dtsize = server->rsize; | |
763 | ||
764 | if (server->flags & NFS_MOUNT_NOAC) { | |
765 | server->acregmin = server->acregmax = 0; | |
766 | server->acdirmin = server->acdirmax = 0; | |
767 | } | |
768 | ||
769 | server->maxfilesize = fsinfo->maxfilesize; | |
770 | ||
771 | /* We're airborne Set socket buffersize */ | |
772 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
773 | } | |
774 | ||
775 | /* | |
776 | * Probe filesystem information, including the FSID on v2/v3 | |
777 | */ | |
778 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
779 | { | |
780 | struct nfs_fsinfo fsinfo; | |
781 | struct nfs_client *clp = server->nfs_client; | |
782 | int error; | |
783 | ||
784 | dprintk("--> nfs_probe_fsinfo()\n"); | |
785 | ||
786 | if (clp->rpc_ops->set_capabilities != NULL) { | |
787 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
788 | if (error < 0) | |
789 | goto out_error; | |
790 | } | |
791 | ||
792 | fsinfo.fattr = fattr; | |
793 | nfs_fattr_init(fattr); | |
794 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
795 | if (error < 0) | |
796 | goto out_error; | |
797 | ||
798 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
799 | error = bdi_init(&server->backing_dev_info); |
800 | if (error) | |
801 | goto out_error; | |
802 | ||
54ceac45 DH |
803 | |
804 | /* Get some general file system info */ | |
805 | if (server->namelen == 0) { | |
806 | struct nfs_pathconf pathinfo; | |
807 | ||
808 | pathinfo.fattr = fattr; | |
809 | nfs_fattr_init(fattr); | |
810 | ||
811 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
812 | server->namelen = pathinfo.max_namelen; | |
813 | } | |
814 | ||
815 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
816 | return 0; | |
817 | ||
818 | out_error: | |
819 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
820 | return error; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Copy useful information when duplicating a server record | |
825 | */ | |
826 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
827 | { | |
828 | target->flags = source->flags; | |
829 | target->acregmin = source->acregmin; | |
830 | target->acregmax = source->acregmax; | |
831 | target->acdirmin = source->acdirmin; | |
832 | target->acdirmax = source->acdirmax; | |
833 | target->caps = source->caps; | |
834 | } | |
835 | ||
836 | /* | |
837 | * Allocate and initialise a server record | |
838 | */ | |
839 | static struct nfs_server *nfs_alloc_server(void) | |
840 | { | |
841 | struct nfs_server *server; | |
842 | ||
843 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
844 | if (!server) | |
845 | return NULL; | |
846 | ||
847 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
848 | ||
849 | /* Zero out the NFS state stuff */ | |
850 | INIT_LIST_HEAD(&server->client_link); | |
851 | INIT_LIST_HEAD(&server->master_link); | |
852 | ||
ef818a28 SD |
853 | init_waitqueue_head(&server->active_wq); |
854 | atomic_set(&server->active, 0); | |
855 | ||
54ceac45 DH |
856 | server->io_stats = nfs_alloc_iostats(); |
857 | if (!server->io_stats) { | |
858 | kfree(server); | |
859 | return NULL; | |
860 | } | |
861 | ||
862 | return server; | |
863 | } | |
864 | ||
865 | /* | |
866 | * Free up a server record | |
867 | */ | |
868 | void nfs_free_server(struct nfs_server *server) | |
869 | { | |
870 | dprintk("--> nfs_free_server()\n"); | |
871 | ||
872 | spin_lock(&nfs_client_lock); | |
873 | list_del(&server->client_link); | |
874 | list_del(&server->master_link); | |
875 | spin_unlock(&nfs_client_lock); | |
876 | ||
877 | if (server->destroy != NULL) | |
878 | server->destroy(server); | |
5cef338b TM |
879 | |
880 | if (!IS_ERR(server->client_acl)) | |
881 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
882 | if (!IS_ERR(server->client)) |
883 | rpc_shutdown_client(server->client); | |
884 | ||
885 | nfs_put_client(server->nfs_client); | |
886 | ||
887 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 888 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
889 | kfree(server); |
890 | nfs_release_automount_timer(); | |
891 | dprintk("<-- nfs_free_server()\n"); | |
892 | } | |
893 | ||
894 | /* | |
895 | * Create a version 2 or 3 volume record | |
896 | * - keyed on server and FSID | |
897 | */ | |
2283f8d6 | 898 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
899 | struct nfs_fh *mntfh) |
900 | { | |
901 | struct nfs_server *server; | |
902 | struct nfs_fattr fattr; | |
903 | int error; | |
904 | ||
905 | server = nfs_alloc_server(); | |
906 | if (!server) | |
907 | return ERR_PTR(-ENOMEM); | |
908 | ||
909 | /* Get a client representation */ | |
910 | error = nfs_init_server(server, data); | |
911 | if (error < 0) | |
912 | goto error; | |
913 | ||
914 | BUG_ON(!server->nfs_client); | |
915 | BUG_ON(!server->nfs_client->rpc_ops); | |
916 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
917 | ||
918 | /* Probe the root fh to retrieve its FSID */ | |
919 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
920 | if (error < 0) | |
921 | goto error; | |
54af3bb5 TM |
922 | if (server->nfs_client->rpc_ops->version == 3) { |
923 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
924 | server->namelen = NFS3_MAXNAMLEN; | |
925 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
926 | server->caps |= NFS_CAP_READDIRPLUS; | |
927 | } else { | |
928 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
929 | server->namelen = NFS2_MAXNAMLEN; | |
930 | } | |
931 | ||
54ceac45 DH |
932 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
933 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
934 | if (error < 0) { | |
935 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
936 | goto error; | |
937 | } | |
938 | } | |
939 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
940 | ||
6daabf1b DH |
941 | dprintk("Server FSID: %llx:%llx\n", |
942 | (unsigned long long) server->fsid.major, | |
943 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
944 | |
945 | BUG_ON(!server->nfs_client); | |
946 | BUG_ON(!server->nfs_client->rpc_ops); | |
947 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
948 | ||
949 | spin_lock(&nfs_client_lock); | |
950 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
951 | list_add_tail(&server->master_link, &nfs_volume_list); | |
952 | spin_unlock(&nfs_client_lock); | |
953 | ||
954 | server->mount_time = jiffies; | |
955 | return server; | |
956 | ||
957 | error: | |
958 | nfs_free_server(server); | |
959 | return ERR_PTR(error); | |
960 | } | |
961 | ||
962 | #ifdef CONFIG_NFS_V4 | |
963 | /* | |
964 | * Initialise an NFS4 client record | |
965 | */ | |
966 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 967 | const struct rpc_timeout *timeparms, |
7d9ac06f | 968 | const char *ip_addr, |
54ceac45 DH |
969 | rpc_authflavor_t authflavour) |
970 | { | |
971 | int error; | |
972 | ||
973 | if (clp->cl_cons_state == NFS_CS_READY) { | |
974 | /* the client is initialised already */ | |
975 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
976 | return 0; | |
977 | } | |
978 | ||
979 | /* Check NFS protocol revision and initialize RPC op vector */ | |
980 | clp->rpc_ops = &nfs_v4_clientops; | |
981 | ||
59dca3b2 | 982 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
43d78ef2 | 983 | RPC_CLNT_CREATE_DISCRTRY); |
54ceac45 DH |
984 | if (error < 0) |
985 | goto error; | |
7d9ac06f | 986 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
987 | |
988 | error = nfs_idmap_new(clp); | |
989 | if (error < 0) { | |
990 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 991 | __func__, error); |
54ceac45 DH |
992 | goto error; |
993 | } | |
9c5bf38d | 994 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
995 | |
996 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
997 | return 0; | |
998 | ||
999 | error: | |
1000 | nfs_mark_client_ready(clp, error); | |
1001 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1002 | return error; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Set up an NFS4 client | |
1007 | */ | |
1008 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1009 | const char *hostname, |
1010 | const struct sockaddr *addr, | |
1011 | const size_t addrlen, | |
7d9ac06f | 1012 | const char *ip_addr, |
54ceac45 | 1013 | rpc_authflavor_t authflavour, |
33170233 | 1014 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 1015 | { |
3a498026 TM |
1016 | struct nfs_client_initdata cl_init = { |
1017 | .hostname = hostname, | |
dcecae0f CL |
1018 | .addr = addr, |
1019 | .addrlen = addrlen, | |
40c55319 | 1020 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1021 | .proto = proto, |
3a498026 | 1022 | }; |
54ceac45 DH |
1023 | struct nfs_client *clp; |
1024 | int error; | |
1025 | ||
1026 | dprintk("--> nfs4_set_client()\n"); | |
1027 | ||
1028 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1029 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1030 | if (IS_ERR(clp)) { |
1031 | error = PTR_ERR(clp); | |
1032 | goto error; | |
1033 | } | |
59dca3b2 | 1034 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour); |
54ceac45 DH |
1035 | if (error < 0) |
1036 | goto error_put; | |
1037 | ||
1038 | server->nfs_client = clp; | |
1039 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1040 | return 0; | |
1041 | ||
1042 | error_put: | |
1043 | nfs_put_client(clp); | |
1044 | error: | |
1045 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1046 | return error; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Create a version 4 volume record | |
1051 | */ | |
1052 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1053 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1054 | { |
33170233 | 1055 | struct rpc_timeout timeparms; |
54ceac45 DH |
1056 | int error; |
1057 | ||
1058 | dprintk("--> nfs4_init_server()\n"); | |
1059 | ||
33170233 TM |
1060 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1061 | data->timeo, data->retrans); | |
1062 | ||
1063 | /* Get a client record */ | |
1064 | error = nfs4_set_client(server, | |
1065 | data->nfs_server.hostname, | |
1066 | (const struct sockaddr *)&data->nfs_server.address, | |
1067 | data->nfs_server.addrlen, | |
1068 | data->client_address, | |
1069 | data->auth_flavors[0], | |
1070 | data->nfs_server.protocol, | |
1071 | &timeparms); | |
1072 | if (error < 0) | |
1073 | goto error; | |
1074 | ||
54ceac45 DH |
1075 | /* Initialise the client representation from the mount data */ |
1076 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
1077 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1078 | ||
1079 | if (data->rsize) | |
1080 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1081 | if (data->wsize) | |
1082 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1083 | ||
1084 | server->acregmin = data->acregmin * HZ; | |
1085 | server->acregmax = data->acregmax * HZ; | |
1086 | server->acdirmin = data->acdirmin * HZ; | |
1087 | server->acdirmax = data->acdirmax * HZ; | |
1088 | ||
f22d6d79 CL |
1089 | server->port = data->nfs_server.port; |
1090 | ||
33170233 | 1091 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1092 | |
33170233 | 1093 | error: |
54ceac45 DH |
1094 | /* Done */ |
1095 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1096 | return error; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Create a version 4 volume record | |
1101 | * - keyed on server and FSID | |
1102 | */ | |
91ea40b9 | 1103 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1104 | struct nfs_fh *mntfh) |
1105 | { | |
1106 | struct nfs_fattr fattr; | |
1107 | struct nfs_server *server; | |
1108 | int error; | |
1109 | ||
1110 | dprintk("--> nfs4_create_server()\n"); | |
1111 | ||
1112 | server = nfs_alloc_server(); | |
1113 | if (!server) | |
1114 | return ERR_PTR(-ENOMEM); | |
1115 | ||
54ceac45 | 1116 | /* set up the general RPC client */ |
91ea40b9 | 1117 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1118 | if (error < 0) |
1119 | goto error; | |
1120 | ||
1121 | BUG_ON(!server->nfs_client); | |
1122 | BUG_ON(!server->nfs_client->rpc_ops); | |
1123 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1124 | ||
1125 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1126 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1127 | if (error < 0) |
1128 | goto error; | |
1129 | ||
6daabf1b DH |
1130 | dprintk("Server FSID: %llx:%llx\n", |
1131 | (unsigned long long) server->fsid.major, | |
1132 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1133 | dprintk("Mount FH: %d\n", mntfh->size); |
1134 | ||
1135 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1136 | if (error < 0) | |
1137 | goto error; | |
1138 | ||
54af3bb5 TM |
1139 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1140 | server->namelen = NFS4_MAXNAMLEN; | |
1141 | ||
54ceac45 DH |
1142 | BUG_ON(!server->nfs_client); |
1143 | BUG_ON(!server->nfs_client->rpc_ops); | |
1144 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1145 | ||
1146 | spin_lock(&nfs_client_lock); | |
1147 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1148 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1149 | spin_unlock(&nfs_client_lock); | |
1150 | ||
1151 | server->mount_time = jiffies; | |
1152 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1153 | return server; | |
1154 | ||
1155 | error: | |
1156 | nfs_free_server(server); | |
1157 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1158 | return ERR_PTR(error); | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * Create an NFS4 referral server record | |
1163 | */ | |
1164 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1165 | struct nfs_fh *mntfh) |
54ceac45 DH |
1166 | { |
1167 | struct nfs_client *parent_client; | |
1168 | struct nfs_server *server, *parent_server; | |
1169 | struct nfs_fattr fattr; | |
1170 | int error; | |
1171 | ||
1172 | dprintk("--> nfs4_create_referral_server()\n"); | |
1173 | ||
1174 | server = nfs_alloc_server(); | |
1175 | if (!server) | |
1176 | return ERR_PTR(-ENOMEM); | |
1177 | ||
1178 | parent_server = NFS_SB(data->sb); | |
1179 | parent_client = parent_server->nfs_client; | |
1180 | ||
1181 | /* Get a client representation. | |
1182 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1183 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1184 | data->addr, |
1185 | data->addrlen, | |
dcecae0f CL |
1186 | parent_client->cl_ipaddr, |
1187 | data->authflavor, | |
1188 | parent_server->client->cl_xprt->prot, | |
33170233 | 1189 | parent_server->client->cl_timeout); |
297de4f6 | 1190 | if (error < 0) |
1191 | goto error; | |
54ceac45 DH |
1192 | |
1193 | /* Initialise the client representation from the parent server */ | |
1194 | nfs_server_copy_userdata(server, parent_server); | |
1195 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1196 | ||
33170233 | 1197 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1198 | if (error < 0) |
1199 | goto error; | |
1200 | ||
1201 | BUG_ON(!server->nfs_client); | |
1202 | BUG_ON(!server->nfs_client->rpc_ops); | |
1203 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1204 | ||
f2d0d85e TM |
1205 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1206 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1207 | if (error < 0) | |
1208 | goto error; | |
1209 | ||
54ceac45 | 1210 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1211 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1212 | if (error < 0) |
1213 | goto error; | |
1214 | ||
54af3bb5 TM |
1215 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1216 | server->namelen = NFS4_MAXNAMLEN; | |
1217 | ||
54ceac45 | 1218 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1219 | (unsigned long long) server->fsid.major, |
1220 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1221 | |
1222 | spin_lock(&nfs_client_lock); | |
1223 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1224 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1225 | spin_unlock(&nfs_client_lock); | |
1226 | ||
1227 | server->mount_time = jiffies; | |
1228 | ||
1229 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1230 | return server; | |
1231 | ||
1232 | error: | |
1233 | nfs_free_server(server); | |
1234 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1235 | return ERR_PTR(error); | |
1236 | } | |
1237 | ||
1238 | #endif /* CONFIG_NFS_V4 */ | |
1239 | ||
1240 | /* | |
1241 | * Clone an NFS2, NFS3 or NFS4 server record | |
1242 | */ | |
1243 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1244 | struct nfs_fh *fh, | |
1245 | struct nfs_fattr *fattr) | |
1246 | { | |
1247 | struct nfs_server *server; | |
1248 | struct nfs_fattr fattr_fsinfo; | |
1249 | int error; | |
1250 | ||
1251 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1252 | (unsigned long long) fattr->fsid.major, |
1253 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1254 | |
1255 | server = nfs_alloc_server(); | |
1256 | if (!server) | |
1257 | return ERR_PTR(-ENOMEM); | |
1258 | ||
1259 | /* Copy data from the source */ | |
1260 | server->nfs_client = source->nfs_client; | |
1261 | atomic_inc(&server->nfs_client->cl_count); | |
1262 | nfs_server_copy_userdata(server, source); | |
1263 | ||
1264 | server->fsid = fattr->fsid; | |
1265 | ||
33170233 TM |
1266 | error = nfs_init_server_rpcclient(server, |
1267 | source->client->cl_timeout, | |
1268 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1269 | if (error < 0) |
1270 | goto out_free_server; | |
1271 | if (!IS_ERR(source->client_acl)) | |
1272 | nfs_init_server_aclclient(server); | |
1273 | ||
1274 | /* probe the filesystem info for this server filesystem */ | |
1275 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1276 | if (error < 0) | |
1277 | goto out_free_server; | |
1278 | ||
54af3bb5 TM |
1279 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1280 | server->namelen = NFS4_MAXNAMLEN; | |
1281 | ||
54ceac45 | 1282 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1283 | (unsigned long long) server->fsid.major, |
1284 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1285 | |
1286 | error = nfs_start_lockd(server); | |
1287 | if (error < 0) | |
1288 | goto out_free_server; | |
1289 | ||
1290 | spin_lock(&nfs_client_lock); | |
1291 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1292 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1293 | spin_unlock(&nfs_client_lock); | |
1294 | ||
1295 | server->mount_time = jiffies; | |
1296 | ||
1297 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1298 | return server; | |
1299 | ||
1300 | out_free_server: | |
1301 | nfs_free_server(server); | |
1302 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1303 | return ERR_PTR(error); | |
1304 | } | |
6aaca566 DH |
1305 | |
1306 | #ifdef CONFIG_PROC_FS | |
1307 | static struct proc_dir_entry *proc_fs_nfs; | |
1308 | ||
1309 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1310 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1311 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1312 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1313 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1314 | ||
1315 | static struct seq_operations nfs_server_list_ops = { | |
1316 | .start = nfs_server_list_start, | |
1317 | .next = nfs_server_list_next, | |
1318 | .stop = nfs_server_list_stop, | |
1319 | .show = nfs_server_list_show, | |
1320 | }; | |
1321 | ||
00977a59 | 1322 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1323 | .open = nfs_server_list_open, |
1324 | .read = seq_read, | |
1325 | .llseek = seq_lseek, | |
1326 | .release = seq_release, | |
34b37235 | 1327 | .owner = THIS_MODULE, |
6aaca566 DH |
1328 | }; |
1329 | ||
1330 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1331 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1332 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1333 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1334 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1335 | ||
1336 | static struct seq_operations nfs_volume_list_ops = { | |
1337 | .start = nfs_volume_list_start, | |
1338 | .next = nfs_volume_list_next, | |
1339 | .stop = nfs_volume_list_stop, | |
1340 | .show = nfs_volume_list_show, | |
1341 | }; | |
1342 | ||
00977a59 | 1343 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1344 | .open = nfs_volume_list_open, |
1345 | .read = seq_read, | |
1346 | .llseek = seq_lseek, | |
1347 | .release = seq_release, | |
34b37235 | 1348 | .owner = THIS_MODULE, |
6aaca566 DH |
1349 | }; |
1350 | ||
1351 | /* | |
1352 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1353 | * we're dealing | |
1354 | */ | |
1355 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1356 | { | |
1357 | struct seq_file *m; | |
1358 | int ret; | |
1359 | ||
1360 | ret = seq_open(file, &nfs_server_list_ops); | |
1361 | if (ret < 0) | |
1362 | return ret; | |
1363 | ||
1364 | m = file->private_data; | |
1365 | m->private = PDE(inode)->data; | |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * set up the iterator to start reading from the server list and return the first item | |
1372 | */ | |
1373 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1374 | { | |
6aaca566 DH |
1375 | /* lock the list against modification */ |
1376 | spin_lock(&nfs_client_lock); | |
259902ea | 1377 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1378 | } |
1379 | ||
1380 | /* | |
1381 | * move to next server | |
1382 | */ | |
1383 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1384 | { | |
259902ea | 1385 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1386 | } |
1387 | ||
1388 | /* | |
1389 | * clean up after reading from the transports list | |
1390 | */ | |
1391 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1392 | { | |
1393 | spin_unlock(&nfs_client_lock); | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * display a header line followed by a load of call lines | |
1398 | */ | |
1399 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1400 | { | |
1401 | struct nfs_client *clp; | |
1402 | ||
1403 | /* display header on line 1 */ | |
259902ea | 1404 | if (v == &nfs_client_list) { |
6aaca566 DH |
1405 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | /* display one transport per line on subsequent lines */ | |
1410 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1411 | ||
5d8515ca | 1412 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1413 | clp->rpc_ops->version, |
5d8515ca CL |
1414 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1415 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1416 | atomic_read(&clp->cl_count), |
1417 | clp->cl_hostname); | |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1424 | */ | |
1425 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1426 | { | |
1427 | struct seq_file *m; | |
1428 | int ret; | |
1429 | ||
1430 | ret = seq_open(file, &nfs_volume_list_ops); | |
1431 | if (ret < 0) | |
1432 | return ret; | |
1433 | ||
1434 | m = file->private_data; | |
1435 | m->private = PDE(inode)->data; | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * set up the iterator to start reading from the volume list and return the first item | |
1442 | */ | |
1443 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1444 | { | |
6aaca566 DH |
1445 | /* lock the list against modification */ |
1446 | spin_lock(&nfs_client_lock); | |
259902ea | 1447 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1448 | } |
1449 | ||
1450 | /* | |
1451 | * move to next volume | |
1452 | */ | |
1453 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1454 | { | |
259902ea | 1455 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1456 | } |
1457 | ||
1458 | /* | |
1459 | * clean up after reading from the transports list | |
1460 | */ | |
1461 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1462 | { | |
1463 | spin_unlock(&nfs_client_lock); | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * display a header line followed by a load of call lines | |
1468 | */ | |
1469 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1470 | { | |
1471 | struct nfs_server *server; | |
1472 | struct nfs_client *clp; | |
1473 | char dev[8], fsid[17]; | |
1474 | ||
1475 | /* display header on line 1 */ | |
259902ea | 1476 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1477 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1478 | return 0; | |
1479 | } | |
1480 | /* display one transport per line on subsequent lines */ | |
1481 | server = list_entry(v, struct nfs_server, master_link); | |
1482 | clp = server->nfs_client; | |
1483 | ||
1484 | snprintf(dev, 8, "%u:%u", | |
1485 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1486 | ||
1487 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1488 | (unsigned long long) server->fsid.major, |
1489 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1490 | |
5d8515ca | 1491 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1492 | clp->rpc_ops->version, |
5d8515ca CL |
1493 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1494 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1495 | dev, |
1496 | fsid); | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * initialise the /proc/fs/nfsfs/ directory | |
1503 | */ | |
1504 | int __init nfs_fs_proc_init(void) | |
1505 | { | |
1506 | struct proc_dir_entry *p; | |
1507 | ||
36a5aeb8 | 1508 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1509 | if (!proc_fs_nfs) |
1510 | goto error_0; | |
1511 | ||
1512 | proc_fs_nfs->owner = THIS_MODULE; | |
1513 | ||
1514 | /* a file of servers with which we're dealing */ | |
34b37235 DL |
1515 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1516 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1517 | if (!p) |
1518 | goto error_1; | |
1519 | ||
6aaca566 | 1520 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1521 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1522 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1523 | if (!p) |
1524 | goto error_2; | |
6aaca566 DH |
1525 | return 0; |
1526 | ||
1527 | error_2: | |
1528 | remove_proc_entry("servers", proc_fs_nfs); | |
1529 | error_1: | |
36a5aeb8 | 1530 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1531 | error_0: |
1532 | return -ENOMEM; | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * clean up the /proc/fs/nfsfs/ directory | |
1537 | */ | |
1538 | void nfs_fs_proc_exit(void) | |
1539 | { | |
1540 | remove_proc_entry("volumes", proc_fs_nfs); | |
1541 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1542 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1543 | } |
1544 | ||
1545 | #endif /* CONFIG_PROC_FS */ |