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; | |
24c8dbbb DH |
115 | |
116 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
117 | goto error_0; | |
118 | ||
40c55319 TM |
119 | clp->rpc_ops = cl_init->rpc_ops; |
120 | ||
121 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
122 | if (nfs_callback_up() < 0) |
123 | goto error_2; | |
124 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
125 | } | |
126 | ||
127 | atomic_set(&clp->cl_count, 1); | |
128 | clp->cl_cons_state = NFS_CS_INITING; | |
129 | ||
6e4cffd7 CL |
130 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
131 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 132 | |
3a498026 TM |
133 | if (cl_init->hostname) { |
134 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
135 | if (!clp->cl_hostname) |
136 | goto error_3; | |
137 | } | |
138 | ||
139 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
140 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
141 | ||
59dca3b2 TM |
142 | clp->cl_proto = cl_init->proto; |
143 | ||
24c8dbbb DH |
144 | #ifdef CONFIG_NFS_V4 |
145 | init_rwsem(&clp->cl_sem); | |
146 | INIT_LIST_HEAD(&clp->cl_delegations); | |
24c8dbbb | 147 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 148 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
149 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
150 | clp->cl_boot_time = CURRENT_TIME; | |
151 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
152 | #endif | |
153 | ||
154 | return clp; | |
155 | ||
156 | error_3: | |
9c5bf38d TM |
157 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
158 | nfs_callback_down(); | |
24c8dbbb | 159 | error_2: |
24c8dbbb DH |
160 | kfree(clp); |
161 | error_0: | |
162 | return NULL; | |
163 | } | |
164 | ||
5dd3177a TM |
165 | static void nfs4_shutdown_client(struct nfs_client *clp) |
166 | { | |
167 | #ifdef CONFIG_NFS_V4 | |
168 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
169 | nfs4_kill_renewd(clp); | |
9f958ab8 | 170 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
171 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
172 | nfs_idmap_delete(clp); | |
f6a1cc89 TM |
173 | |
174 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
5dd3177a TM |
175 | #endif |
176 | } | |
177 | ||
24c8dbbb DH |
178 | /* |
179 | * Destroy a shared client record | |
180 | */ | |
181 | static void nfs_free_client(struct nfs_client *clp) | |
182 | { | |
40c55319 | 183 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 184 | |
5dd3177a | 185 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
186 | |
187 | /* -EIO all pending I/O */ | |
188 | if (!IS_ERR(clp->cl_rpcclient)) | |
189 | rpc_shutdown_client(clp->cl_rpcclient); | |
190 | ||
191 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
192 | nfs_callback_down(); | |
193 | ||
24c8dbbb DH |
194 | kfree(clp->cl_hostname); |
195 | kfree(clp); | |
196 | ||
197 | dprintk("<-- nfs_free_client()\n"); | |
198 | } | |
199 | ||
200 | /* | |
201 | * Release a reference to a shared client record | |
202 | */ | |
203 | void nfs_put_client(struct nfs_client *clp) | |
204 | { | |
27ba8512 DH |
205 | if (!clp) |
206 | return; | |
207 | ||
24c8dbbb DH |
208 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
209 | ||
210 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
211 | list_del(&clp->cl_share_link); | |
212 | spin_unlock(&nfs_client_lock); | |
213 | ||
214 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
215 | ||
216 | nfs_free_client(clp); | |
217 | } | |
218 | } | |
219 | ||
3b0d3f93 TM |
220 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, |
221 | const struct sockaddr_in *sa2) | |
222 | { | |
223 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
224 | } | |
225 | ||
226 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr_in6 *sa1, | |
227 | const struct sockaddr_in6 *sa2) | |
228 | { | |
229 | return ipv6_addr_equal(&sa1->sin6_addr, &sa2->sin6_addr); | |
230 | } | |
231 | ||
232 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
233 | const struct sockaddr *sa2) | |
234 | { | |
235 | switch (sa1->sa_family) { | |
236 | case AF_INET: | |
237 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
238 | (const struct sockaddr_in *)sa2); | |
239 | case AF_INET6: | |
240 | return nfs_sockaddr_match_ipaddr6((const struct sockaddr_in6 *)sa1, | |
241 | (const struct sockaddr_in6 *)sa2); | |
242 | } | |
243 | BUG(); | |
244 | } | |
245 | ||
24c8dbbb | 246 | /* |
c81468a1 TM |
247 | * Find a client by IP address and protocol version |
248 | * - returns NULL if no such client | |
24c8dbbb | 249 | */ |
ff052645 | 250 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
251 | { |
252 | struct nfs_client *clp; | |
253 | ||
c81468a1 | 254 | spin_lock(&nfs_client_lock); |
24c8dbbb | 255 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
256 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
257 | ||
13bbc06a | 258 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 259 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
260 | continue; |
261 | ||
24c8dbbb | 262 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 263 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
264 | continue; |
265 | ||
3b0d3f93 TM |
266 | if (addr->sa_family != clap->sa_family) |
267 | continue; | |
c81468a1 | 268 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 269 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
270 | continue; |
271 | ||
c81468a1 TM |
272 | atomic_inc(&clp->cl_count); |
273 | spin_unlock(&nfs_client_lock); | |
274 | return clp; | |
24c8dbbb | 275 | } |
c81468a1 | 276 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 277 | return NULL; |
24c8dbbb DH |
278 | } |
279 | ||
3fbd67ad TM |
280 | /* |
281 | * Find a client by IP address and protocol version | |
282 | * - returns NULL if no such client | |
283 | */ | |
284 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
285 | { | |
286 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
287 | u32 nfsvers = clp->rpc_ops->version; | |
288 | ||
289 | spin_lock(&nfs_client_lock); | |
290 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
291 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
292 | ||
293 | /* Don't match clients that failed to initialise properly */ | |
294 | if (clp->cl_cons_state != NFS_CS_READY) | |
295 | continue; | |
296 | ||
297 | /* Different NFS versions cannot share the same nfs_client */ | |
298 | if (clp->rpc_ops->version != nfsvers) | |
299 | continue; | |
300 | ||
301 | if (sap->sa_family != clap->sa_family) | |
302 | continue; | |
303 | /* Match only the IP address, not the port number */ | |
304 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
305 | continue; | |
306 | ||
307 | atomic_inc(&clp->cl_count); | |
308 | spin_unlock(&nfs_client_lock); | |
309 | return clp; | |
310 | } | |
311 | spin_unlock(&nfs_client_lock); | |
312 | return NULL; | |
313 | } | |
314 | ||
24c8dbbb | 315 | /* |
c81468a1 TM |
316 | * Find an nfs_client on the list that matches the initialisation data |
317 | * that is supplied. | |
24c8dbbb | 318 | */ |
c81468a1 | 319 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
320 | { |
321 | struct nfs_client *clp; | |
322 | ||
c81468a1 TM |
323 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
324 | /* Don't match clients that failed to initialise properly */ | |
325 | if (clp->cl_cons_state < 0) | |
326 | continue; | |
327 | ||
328 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 329 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
330 | continue; |
331 | ||
59dca3b2 TM |
332 | if (clp->cl_proto != data->proto) |
333 | continue; | |
334 | ||
c81468a1 TM |
335 | /* Match the full socket address */ |
336 | if (memcmp(&clp->cl_addr, data->addr, sizeof(clp->cl_addr)) != 0) | |
337 | continue; | |
338 | ||
339 | atomic_inc(&clp->cl_count); | |
340 | return clp; | |
13bbc06a | 341 | } |
c81468a1 | 342 | return NULL; |
24c8dbbb DH |
343 | } |
344 | ||
345 | /* | |
346 | * Look up a client by IP address and protocol version | |
347 | * - creates a new record if one doesn't yet exist | |
348 | */ | |
3a498026 | 349 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
350 | { |
351 | struct nfs_client *clp, *new = NULL; | |
352 | int error; | |
353 | ||
d7422c47 CL |
354 | dprintk("--> nfs_get_client(%s,v%u)\n", |
355 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
356 | |
357 | /* see if the client already exists */ | |
358 | do { | |
359 | spin_lock(&nfs_client_lock); | |
360 | ||
c81468a1 | 361 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
362 | if (clp) |
363 | goto found_client; | |
364 | if (new) | |
365 | goto install_client; | |
366 | ||
367 | spin_unlock(&nfs_client_lock); | |
368 | ||
3a498026 | 369 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
370 | } while (new); |
371 | ||
372 | return ERR_PTR(-ENOMEM); | |
373 | ||
374 | /* install a new client and return with it unready */ | |
375 | install_client: | |
376 | clp = new; | |
377 | list_add(&clp->cl_share_link, &nfs_client_list); | |
378 | spin_unlock(&nfs_client_lock); | |
379 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
380 | return clp; | |
381 | ||
382 | /* found an existing client | |
383 | * - make sure it's ready before returning | |
384 | */ | |
385 | found_client: | |
386 | spin_unlock(&nfs_client_lock); | |
387 | ||
388 | if (new) | |
389 | nfs_free_client(new); | |
390 | ||
150030b7 | 391 | error = wait_event_killable(nfs_client_active_wq, |
0bae89ec TM |
392 | clp->cl_cons_state != NFS_CS_INITING); |
393 | if (error < 0) { | |
394 | nfs_put_client(clp); | |
395 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
396 | } |
397 | ||
398 | if (clp->cl_cons_state < NFS_CS_READY) { | |
399 | error = clp->cl_cons_state; | |
400 | nfs_put_client(clp); | |
401 | return ERR_PTR(error); | |
402 | } | |
403 | ||
54ceac45 DH |
404 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
405 | ||
24c8dbbb DH |
406 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
407 | return clp; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Mark a server as ready or failed | |
412 | */ | |
54ceac45 | 413 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
414 | { |
415 | clp->cl_cons_state = state; | |
416 | wake_up_all(&nfs_client_active_wq); | |
417 | } | |
5006a76c DH |
418 | |
419 | /* | |
420 | * Initialise the timeout values for a connection | |
421 | */ | |
422 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
423 | unsigned int timeo, unsigned int retrans) | |
424 | { | |
425 | to->to_initval = timeo * HZ / 10; | |
426 | to->to_retries = retrans; | |
427 | if (!to->to_retries) | |
428 | to->to_retries = 2; | |
429 | ||
430 | switch (proto) { | |
0896a725 | 431 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 432 | case XPRT_TRANSPORT_RDMA: |
7a3e3e18 | 433 | if (to->to_initval == 0) |
5006a76c DH |
434 | to->to_initval = 60 * HZ; |
435 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
436 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
437 | to->to_increment = to->to_initval; | |
438 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
439 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
440 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
441 | if (to->to_maxval < to->to_initval) | |
442 | to->to_maxval = to->to_initval; | |
5006a76c DH |
443 | to->to_exponential = 0; |
444 | break; | |
0896a725 | 445 | case XPRT_TRANSPORT_UDP: |
5006a76c DH |
446 | default: |
447 | if (!to->to_initval) | |
448 | to->to_initval = 11 * HZ / 10; | |
449 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
450 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
451 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
452 | to->to_exponential = 1; | |
453 | break; | |
454 | } | |
455 | } | |
456 | ||
457 | /* | |
458 | * Create an RPC client handle | |
459 | */ | |
59dca3b2 | 460 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
461 | const struct rpc_timeout *timeparms, |
462 | rpc_authflavor_t flavor, | |
463 | int flags) | |
5006a76c | 464 | { |
5006a76c | 465 | struct rpc_clnt *clnt = NULL; |
41877d20 | 466 | struct rpc_create_args args = { |
59dca3b2 | 467 | .protocol = clp->cl_proto, |
41877d20 | 468 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 469 | .addrsize = clp->cl_addrlen, |
33170233 | 470 | .timeout = timeparms, |
41877d20 CL |
471 | .servername = clp->cl_hostname, |
472 | .program = &nfs_program, | |
473 | .version = clp->rpc_ops->version, | |
474 | .authflavor = flavor, | |
43d78ef2 | 475 | .flags = flags, |
41877d20 | 476 | }; |
5006a76c DH |
477 | |
478 | if (!IS_ERR(clp->cl_rpcclient)) | |
479 | return 0; | |
480 | ||
41877d20 | 481 | clnt = rpc_create(&args); |
5006a76c DH |
482 | if (IS_ERR(clnt)) { |
483 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
484 | __FUNCTION__, PTR_ERR(clnt)); | |
485 | return PTR_ERR(clnt); | |
486 | } | |
487 | ||
5006a76c DH |
488 | clp->cl_rpcclient = clnt; |
489 | return 0; | |
490 | } | |
54ceac45 DH |
491 | |
492 | /* | |
493 | * Version 2 or 3 client destruction | |
494 | */ | |
495 | static void nfs_destroy_server(struct nfs_server *server) | |
496 | { | |
54ceac45 | 497 | if (!(server->flags & NFS_MOUNT_NONLM)) |
9289e7f9 | 498 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
499 | } |
500 | ||
501 | /* | |
502 | * Version 2 or 3 lockd setup | |
503 | */ | |
504 | static int nfs_start_lockd(struct nfs_server *server) | |
505 | { | |
9289e7f9 CL |
506 | struct nlm_host *host; |
507 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
508 | struct nlmclnt_initdata nlm_init = { |
509 | .hostname = clp->cl_hostname, | |
510 | .address = (struct sockaddr *)&clp->cl_addr, | |
511 | .addrlen = clp->cl_addrlen, | |
512 | .protocol = server->flags & NFS_MOUNT_TCP ? | |
513 | IPPROTO_TCP : IPPROTO_UDP, | |
514 | .nfs_version = clp->rpc_ops->version, | |
515 | }; | |
54ceac45 | 516 | |
883bb163 | 517 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 518 | return 0; |
54ceac45 | 519 | if (server->flags & NFS_MOUNT_NONLM) |
9289e7f9 CL |
520 | return 0; |
521 | ||
883bb163 | 522 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
523 | if (IS_ERR(host)) |
524 | return PTR_ERR(host); | |
525 | ||
526 | server->nlm_host = host; | |
527 | server->destroy = nfs_destroy_server; | |
528 | return 0; | |
54ceac45 DH |
529 | } |
530 | ||
531 | /* | |
532 | * Initialise an NFSv3 ACL client connection | |
533 | */ | |
534 | #ifdef CONFIG_NFS_V3_ACL | |
535 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
536 | { | |
40c55319 | 537 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
538 | goto out_noacl; |
539 | if (server->flags & NFS_MOUNT_NOACL) | |
540 | goto out_noacl; | |
541 | ||
542 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
543 | if (IS_ERR(server->client_acl)) | |
544 | goto out_noacl; | |
545 | ||
546 | /* No errors! Assume that Sun nfsacls are supported */ | |
547 | server->caps |= NFS_CAP_ACLS; | |
548 | return; | |
549 | ||
550 | out_noacl: | |
551 | server->caps &= ~NFS_CAP_ACLS; | |
552 | } | |
553 | #else | |
554 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
555 | { | |
556 | server->flags &= ~NFS_MOUNT_NOACL; | |
557 | server->caps &= ~NFS_CAP_ACLS; | |
558 | } | |
559 | #endif | |
560 | ||
561 | /* | |
562 | * Create a general RPC client | |
563 | */ | |
33170233 TM |
564 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
565 | const struct rpc_timeout *timeo, | |
566 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
567 | { |
568 | struct nfs_client *clp = server->nfs_client; | |
569 | ||
570 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
571 | if (IS_ERR(server->client)) { | |
572 | dprintk("%s: couldn't create rpc_client!\n", __FUNCTION__); | |
573 | return PTR_ERR(server->client); | |
574 | } | |
575 | ||
33170233 TM |
576 | memcpy(&server->client->cl_timeout_default, |
577 | timeo, | |
578 | sizeof(server->client->cl_timeout_default)); | |
579 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
580 | ||
54ceac45 DH |
581 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
582 | struct rpc_auth *auth; | |
583 | ||
584 | auth = rpcauth_create(pseudoflavour, server->client); | |
585 | if (IS_ERR(auth)) { | |
586 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); | |
587 | return PTR_ERR(auth); | |
588 | } | |
589 | } | |
590 | server->client->cl_softrtry = 0; | |
591 | if (server->flags & NFS_MOUNT_SOFT) | |
592 | server->client->cl_softrtry = 1; | |
593 | ||
54ceac45 DH |
594 | return 0; |
595 | } | |
596 | ||
597 | /* | |
598 | * Initialise an NFS2 or NFS3 client | |
599 | */ | |
2283f8d6 | 600 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 601 | const struct rpc_timeout *timeparms, |
2283f8d6 | 602 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 603 | { |
54ceac45 DH |
604 | int error; |
605 | ||
606 | if (clp->cl_cons_state == NFS_CS_READY) { | |
607 | /* the client is already initialised */ | |
608 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
609 | return 0; | |
610 | } | |
611 | ||
54ceac45 DH |
612 | /* |
613 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
614 | * - RFC 2623, sec 2.3.2 | |
615 | */ | |
59dca3b2 | 616 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, 0); |
54ceac45 DH |
617 | if (error < 0) |
618 | goto error; | |
619 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
620 | return 0; | |
621 | ||
622 | error: | |
623 | nfs_mark_client_ready(clp, error); | |
624 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
625 | return error; | |
626 | } | |
627 | ||
628 | /* | |
629 | * Create a version 2 or 3 client | |
630 | */ | |
2283f8d6 TT |
631 | static int nfs_init_server(struct nfs_server *server, |
632 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 633 | { |
3a498026 TM |
634 | struct nfs_client_initdata cl_init = { |
635 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 636 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 637 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 638 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 639 | .proto = data->nfs_server.protocol, |
3a498026 | 640 | }; |
33170233 | 641 | struct rpc_timeout timeparms; |
54ceac45 | 642 | struct nfs_client *clp; |
3a498026 | 643 | int error; |
54ceac45 DH |
644 | |
645 | dprintk("--> nfs_init_server()\n"); | |
646 | ||
647 | #ifdef CONFIG_NFS_V3 | |
648 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 649 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
650 | #endif |
651 | ||
652 | /* Allocate or find a client reference we can use */ | |
3a498026 | 653 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
654 | if (IS_ERR(clp)) { |
655 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
656 | return PTR_ERR(clp); | |
657 | } | |
658 | ||
33170233 TM |
659 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
660 | data->timeo, data->retrans); | |
661 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
662 | if (error < 0) |
663 | goto error; | |
664 | ||
665 | server->nfs_client = clp; | |
666 | ||
667 | /* Initialise the client representation from the mount data */ | |
668 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
669 | ||
670 | if (data->rsize) | |
671 | server->rsize = nfs_block_size(data->rsize, NULL); | |
672 | if (data->wsize) | |
673 | server->wsize = nfs_block_size(data->wsize, NULL); | |
674 | ||
675 | server->acregmin = data->acregmin * HZ; | |
676 | server->acregmax = data->acregmax * HZ; | |
677 | server->acdirmin = data->acdirmin * HZ; | |
678 | server->acdirmax = data->acdirmax * HZ; | |
679 | ||
680 | /* Start lockd here, before we might error out */ | |
681 | error = nfs_start_lockd(server); | |
682 | if (error < 0) | |
683 | goto error; | |
684 | ||
f22d6d79 CL |
685 | server->port = data->nfs_server.port; |
686 | ||
33170233 | 687 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
688 | if (error < 0) |
689 | goto error; | |
690 | ||
3f8400d1 CL |
691 | /* Preserve the values of mount_server-related mount options */ |
692 | if (data->mount_server.addrlen) { | |
693 | memcpy(&server->mountd_address, &data->mount_server.address, | |
694 | data->mount_server.addrlen); | |
695 | server->mountd_addrlen = data->mount_server.addrlen; | |
696 | } | |
697 | server->mountd_version = data->mount_server.version; | |
698 | server->mountd_port = data->mount_server.port; | |
699 | server->mountd_protocol = data->mount_server.protocol; | |
700 | ||
54ceac45 DH |
701 | server->namelen = data->namlen; |
702 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
703 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
704 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
705 | return 0; | |
706 | ||
707 | error: | |
708 | server->nfs_client = NULL; | |
709 | nfs_put_client(clp); | |
710 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
711 | return error; | |
712 | } | |
713 | ||
714 | /* | |
715 | * Load up the server record from information gained in an fsinfo record | |
716 | */ | |
717 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
718 | { | |
719 | unsigned long max_rpc_payload; | |
720 | ||
721 | /* Work out a lot of parameters */ | |
722 | if (server->rsize == 0) | |
723 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
724 | if (server->wsize == 0) | |
725 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
726 | ||
727 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
728 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
729 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
730 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
731 | ||
732 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
733 | if (server->rsize > max_rpc_payload) | |
734 | server->rsize = max_rpc_payload; | |
735 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
736 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
737 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 738 | |
54ceac45 DH |
739 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
740 | ||
741 | if (server->wsize > max_rpc_payload) | |
742 | server->wsize = max_rpc_payload; | |
743 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
744 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
745 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
746 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
747 | ||
748 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
749 | if (server->dtsize > PAGE_CACHE_SIZE) | |
750 | server->dtsize = PAGE_CACHE_SIZE; | |
751 | if (server->dtsize > server->rsize) | |
752 | server->dtsize = server->rsize; | |
753 | ||
754 | if (server->flags & NFS_MOUNT_NOAC) { | |
755 | server->acregmin = server->acregmax = 0; | |
756 | server->acdirmin = server->acdirmax = 0; | |
757 | } | |
758 | ||
759 | server->maxfilesize = fsinfo->maxfilesize; | |
760 | ||
761 | /* We're airborne Set socket buffersize */ | |
762 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
763 | } | |
764 | ||
765 | /* | |
766 | * Probe filesystem information, including the FSID on v2/v3 | |
767 | */ | |
768 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
769 | { | |
770 | struct nfs_fsinfo fsinfo; | |
771 | struct nfs_client *clp = server->nfs_client; | |
772 | int error; | |
773 | ||
774 | dprintk("--> nfs_probe_fsinfo()\n"); | |
775 | ||
776 | if (clp->rpc_ops->set_capabilities != NULL) { | |
777 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
778 | if (error < 0) | |
779 | goto out_error; | |
780 | } | |
781 | ||
782 | fsinfo.fattr = fattr; | |
783 | nfs_fattr_init(fattr); | |
784 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
785 | if (error < 0) | |
786 | goto out_error; | |
787 | ||
788 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
789 | error = bdi_init(&server->backing_dev_info); |
790 | if (error) | |
791 | goto out_error; | |
792 | ||
54ceac45 DH |
793 | |
794 | /* Get some general file system info */ | |
795 | if (server->namelen == 0) { | |
796 | struct nfs_pathconf pathinfo; | |
797 | ||
798 | pathinfo.fattr = fattr; | |
799 | nfs_fattr_init(fattr); | |
800 | ||
801 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
802 | server->namelen = pathinfo.max_namelen; | |
803 | } | |
804 | ||
805 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
806 | return 0; | |
807 | ||
808 | out_error: | |
809 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
810 | return error; | |
811 | } | |
812 | ||
813 | /* | |
814 | * Copy useful information when duplicating a server record | |
815 | */ | |
816 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
817 | { | |
818 | target->flags = source->flags; | |
819 | target->acregmin = source->acregmin; | |
820 | target->acregmax = source->acregmax; | |
821 | target->acdirmin = source->acdirmin; | |
822 | target->acdirmax = source->acdirmax; | |
823 | target->caps = source->caps; | |
824 | } | |
825 | ||
826 | /* | |
827 | * Allocate and initialise a server record | |
828 | */ | |
829 | static struct nfs_server *nfs_alloc_server(void) | |
830 | { | |
831 | struct nfs_server *server; | |
832 | ||
833 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
834 | if (!server) | |
835 | return NULL; | |
836 | ||
837 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
838 | ||
839 | /* Zero out the NFS state stuff */ | |
840 | INIT_LIST_HEAD(&server->client_link); | |
841 | INIT_LIST_HEAD(&server->master_link); | |
842 | ||
ef818a28 SD |
843 | init_waitqueue_head(&server->active_wq); |
844 | atomic_set(&server->active, 0); | |
845 | ||
54ceac45 DH |
846 | server->io_stats = nfs_alloc_iostats(); |
847 | if (!server->io_stats) { | |
848 | kfree(server); | |
849 | return NULL; | |
850 | } | |
851 | ||
852 | return server; | |
853 | } | |
854 | ||
855 | /* | |
856 | * Free up a server record | |
857 | */ | |
858 | void nfs_free_server(struct nfs_server *server) | |
859 | { | |
860 | dprintk("--> nfs_free_server()\n"); | |
861 | ||
862 | spin_lock(&nfs_client_lock); | |
863 | list_del(&server->client_link); | |
864 | list_del(&server->master_link); | |
865 | spin_unlock(&nfs_client_lock); | |
866 | ||
867 | if (server->destroy != NULL) | |
868 | server->destroy(server); | |
5cef338b TM |
869 | |
870 | if (!IS_ERR(server->client_acl)) | |
871 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
872 | if (!IS_ERR(server->client)) |
873 | rpc_shutdown_client(server->client); | |
874 | ||
875 | nfs_put_client(server->nfs_client); | |
876 | ||
877 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 878 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
879 | kfree(server); |
880 | nfs_release_automount_timer(); | |
881 | dprintk("<-- nfs_free_server()\n"); | |
882 | } | |
883 | ||
884 | /* | |
885 | * Create a version 2 or 3 volume record | |
886 | * - keyed on server and FSID | |
887 | */ | |
2283f8d6 | 888 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
889 | struct nfs_fh *mntfh) |
890 | { | |
891 | struct nfs_server *server; | |
892 | struct nfs_fattr fattr; | |
893 | int error; | |
894 | ||
895 | server = nfs_alloc_server(); | |
896 | if (!server) | |
897 | return ERR_PTR(-ENOMEM); | |
898 | ||
899 | /* Get a client representation */ | |
900 | error = nfs_init_server(server, data); | |
901 | if (error < 0) | |
902 | goto error; | |
903 | ||
904 | BUG_ON(!server->nfs_client); | |
905 | BUG_ON(!server->nfs_client->rpc_ops); | |
906 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
907 | ||
908 | /* Probe the root fh to retrieve its FSID */ | |
909 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
910 | if (error < 0) | |
911 | goto error; | |
54af3bb5 TM |
912 | if (server->nfs_client->rpc_ops->version == 3) { |
913 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
914 | server->namelen = NFS3_MAXNAMLEN; | |
915 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
916 | server->caps |= NFS_CAP_READDIRPLUS; | |
917 | } else { | |
918 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
919 | server->namelen = NFS2_MAXNAMLEN; | |
920 | } | |
921 | ||
54ceac45 DH |
922 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
923 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
924 | if (error < 0) { | |
925 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
926 | goto error; | |
927 | } | |
928 | } | |
929 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
930 | ||
6daabf1b DH |
931 | dprintk("Server FSID: %llx:%llx\n", |
932 | (unsigned long long) server->fsid.major, | |
933 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
934 | |
935 | BUG_ON(!server->nfs_client); | |
936 | BUG_ON(!server->nfs_client->rpc_ops); | |
937 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
938 | ||
939 | spin_lock(&nfs_client_lock); | |
940 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
941 | list_add_tail(&server->master_link, &nfs_volume_list); | |
942 | spin_unlock(&nfs_client_lock); | |
943 | ||
944 | server->mount_time = jiffies; | |
945 | return server; | |
946 | ||
947 | error: | |
948 | nfs_free_server(server); | |
949 | return ERR_PTR(error); | |
950 | } | |
951 | ||
952 | #ifdef CONFIG_NFS_V4 | |
953 | /* | |
954 | * Initialise an NFS4 client record | |
955 | */ | |
956 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 957 | const struct rpc_timeout *timeparms, |
7d9ac06f | 958 | const char *ip_addr, |
54ceac45 DH |
959 | rpc_authflavor_t authflavour) |
960 | { | |
961 | int error; | |
962 | ||
963 | if (clp->cl_cons_state == NFS_CS_READY) { | |
964 | /* the client is initialised already */ | |
965 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | /* Check NFS protocol revision and initialize RPC op vector */ | |
970 | clp->rpc_ops = &nfs_v4_clientops; | |
971 | ||
59dca3b2 | 972 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
43d78ef2 | 973 | RPC_CLNT_CREATE_DISCRTRY); |
54ceac45 DH |
974 | if (error < 0) |
975 | goto error; | |
7d9ac06f | 976 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
977 | |
978 | error = nfs_idmap_new(clp); | |
979 | if (error < 0) { | |
980 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
981 | __FUNCTION__, error); | |
54ceac45 DH |
982 | goto error; |
983 | } | |
9c5bf38d | 984 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
985 | |
986 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
987 | return 0; | |
988 | ||
989 | error: | |
990 | nfs_mark_client_ready(clp, error); | |
991 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
992 | return error; | |
993 | } | |
994 | ||
995 | /* | |
996 | * Set up an NFS4 client | |
997 | */ | |
998 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
999 | const char *hostname, |
1000 | const struct sockaddr *addr, | |
1001 | const size_t addrlen, | |
7d9ac06f | 1002 | const char *ip_addr, |
54ceac45 | 1003 | rpc_authflavor_t authflavour, |
33170233 | 1004 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 1005 | { |
3a498026 TM |
1006 | struct nfs_client_initdata cl_init = { |
1007 | .hostname = hostname, | |
dcecae0f CL |
1008 | .addr = addr, |
1009 | .addrlen = addrlen, | |
40c55319 | 1010 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1011 | .proto = proto, |
3a498026 | 1012 | }; |
54ceac45 DH |
1013 | struct nfs_client *clp; |
1014 | int error; | |
1015 | ||
1016 | dprintk("--> nfs4_set_client()\n"); | |
1017 | ||
1018 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1019 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1020 | if (IS_ERR(clp)) { |
1021 | error = PTR_ERR(clp); | |
1022 | goto error; | |
1023 | } | |
59dca3b2 | 1024 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour); |
54ceac45 DH |
1025 | if (error < 0) |
1026 | goto error_put; | |
1027 | ||
1028 | server->nfs_client = clp; | |
1029 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1030 | return 0; | |
1031 | ||
1032 | error_put: | |
1033 | nfs_put_client(clp); | |
1034 | error: | |
1035 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1036 | return error; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Create a version 4 volume record | |
1041 | */ | |
1042 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1043 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1044 | { |
33170233 | 1045 | struct rpc_timeout timeparms; |
54ceac45 DH |
1046 | int error; |
1047 | ||
1048 | dprintk("--> nfs4_init_server()\n"); | |
1049 | ||
33170233 TM |
1050 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1051 | data->timeo, data->retrans); | |
1052 | ||
1053 | /* Get a client record */ | |
1054 | error = nfs4_set_client(server, | |
1055 | data->nfs_server.hostname, | |
1056 | (const struct sockaddr *)&data->nfs_server.address, | |
1057 | data->nfs_server.addrlen, | |
1058 | data->client_address, | |
1059 | data->auth_flavors[0], | |
1060 | data->nfs_server.protocol, | |
1061 | &timeparms); | |
1062 | if (error < 0) | |
1063 | goto error; | |
1064 | ||
54ceac45 DH |
1065 | /* Initialise the client representation from the mount data */ |
1066 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
1067 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1068 | ||
1069 | if (data->rsize) | |
1070 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1071 | if (data->wsize) | |
1072 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1073 | ||
1074 | server->acregmin = data->acregmin * HZ; | |
1075 | server->acregmax = data->acregmax * HZ; | |
1076 | server->acdirmin = data->acdirmin * HZ; | |
1077 | server->acdirmax = data->acdirmax * HZ; | |
1078 | ||
f22d6d79 CL |
1079 | server->port = data->nfs_server.port; |
1080 | ||
33170233 | 1081 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1082 | |
33170233 | 1083 | error: |
54ceac45 DH |
1084 | /* Done */ |
1085 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1086 | return error; | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * Create a version 4 volume record | |
1091 | * - keyed on server and FSID | |
1092 | */ | |
91ea40b9 | 1093 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1094 | struct nfs_fh *mntfh) |
1095 | { | |
1096 | struct nfs_fattr fattr; | |
1097 | struct nfs_server *server; | |
1098 | int error; | |
1099 | ||
1100 | dprintk("--> nfs4_create_server()\n"); | |
1101 | ||
1102 | server = nfs_alloc_server(); | |
1103 | if (!server) | |
1104 | return ERR_PTR(-ENOMEM); | |
1105 | ||
54ceac45 | 1106 | /* set up the general RPC client */ |
91ea40b9 | 1107 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1108 | if (error < 0) |
1109 | goto error; | |
1110 | ||
1111 | BUG_ON(!server->nfs_client); | |
1112 | BUG_ON(!server->nfs_client->rpc_ops); | |
1113 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1114 | ||
1115 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1116 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1117 | if (error < 0) |
1118 | goto error; | |
1119 | ||
6daabf1b DH |
1120 | dprintk("Server FSID: %llx:%llx\n", |
1121 | (unsigned long long) server->fsid.major, | |
1122 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1123 | dprintk("Mount FH: %d\n", mntfh->size); |
1124 | ||
1125 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1126 | if (error < 0) | |
1127 | goto error; | |
1128 | ||
54af3bb5 TM |
1129 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1130 | server->namelen = NFS4_MAXNAMLEN; | |
1131 | ||
54ceac45 DH |
1132 | BUG_ON(!server->nfs_client); |
1133 | BUG_ON(!server->nfs_client->rpc_ops); | |
1134 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1135 | ||
1136 | spin_lock(&nfs_client_lock); | |
1137 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1138 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1139 | spin_unlock(&nfs_client_lock); | |
1140 | ||
1141 | server->mount_time = jiffies; | |
1142 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1143 | return server; | |
1144 | ||
1145 | error: | |
1146 | nfs_free_server(server); | |
1147 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1148 | return ERR_PTR(error); | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Create an NFS4 referral server record | |
1153 | */ | |
1154 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1155 | struct nfs_fh *mntfh) |
54ceac45 DH |
1156 | { |
1157 | struct nfs_client *parent_client; | |
1158 | struct nfs_server *server, *parent_server; | |
1159 | struct nfs_fattr fattr; | |
1160 | int error; | |
1161 | ||
1162 | dprintk("--> nfs4_create_referral_server()\n"); | |
1163 | ||
1164 | server = nfs_alloc_server(); | |
1165 | if (!server) | |
1166 | return ERR_PTR(-ENOMEM); | |
1167 | ||
1168 | parent_server = NFS_SB(data->sb); | |
1169 | parent_client = parent_server->nfs_client; | |
1170 | ||
1171 | /* Get a client representation. | |
1172 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1173 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1174 | data->addr, |
1175 | data->addrlen, | |
dcecae0f CL |
1176 | parent_client->cl_ipaddr, |
1177 | data->authflavor, | |
1178 | parent_server->client->cl_xprt->prot, | |
33170233 | 1179 | parent_server->client->cl_timeout); |
297de4f6 | 1180 | if (error < 0) |
1181 | goto error; | |
54ceac45 DH |
1182 | |
1183 | /* Initialise the client representation from the parent server */ | |
1184 | nfs_server_copy_userdata(server, parent_server); | |
1185 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1186 | ||
33170233 | 1187 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1188 | if (error < 0) |
1189 | goto error; | |
1190 | ||
1191 | BUG_ON(!server->nfs_client); | |
1192 | BUG_ON(!server->nfs_client->rpc_ops); | |
1193 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1194 | ||
f2d0d85e TM |
1195 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1196 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1197 | if (error < 0) | |
1198 | goto error; | |
1199 | ||
54ceac45 | 1200 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1201 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1202 | if (error < 0) |
1203 | goto error; | |
1204 | ||
54af3bb5 TM |
1205 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1206 | server->namelen = NFS4_MAXNAMLEN; | |
1207 | ||
54ceac45 | 1208 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1209 | (unsigned long long) server->fsid.major, |
1210 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1211 | |
1212 | spin_lock(&nfs_client_lock); | |
1213 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1214 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1215 | spin_unlock(&nfs_client_lock); | |
1216 | ||
1217 | server->mount_time = jiffies; | |
1218 | ||
1219 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1220 | return server; | |
1221 | ||
1222 | error: | |
1223 | nfs_free_server(server); | |
1224 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1225 | return ERR_PTR(error); | |
1226 | } | |
1227 | ||
1228 | #endif /* CONFIG_NFS_V4 */ | |
1229 | ||
1230 | /* | |
1231 | * Clone an NFS2, NFS3 or NFS4 server record | |
1232 | */ | |
1233 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1234 | struct nfs_fh *fh, | |
1235 | struct nfs_fattr *fattr) | |
1236 | { | |
1237 | struct nfs_server *server; | |
1238 | struct nfs_fattr fattr_fsinfo; | |
1239 | int error; | |
1240 | ||
1241 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1242 | (unsigned long long) fattr->fsid.major, |
1243 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1244 | |
1245 | server = nfs_alloc_server(); | |
1246 | if (!server) | |
1247 | return ERR_PTR(-ENOMEM); | |
1248 | ||
1249 | /* Copy data from the source */ | |
1250 | server->nfs_client = source->nfs_client; | |
1251 | atomic_inc(&server->nfs_client->cl_count); | |
1252 | nfs_server_copy_userdata(server, source); | |
1253 | ||
1254 | server->fsid = fattr->fsid; | |
1255 | ||
33170233 TM |
1256 | error = nfs_init_server_rpcclient(server, |
1257 | source->client->cl_timeout, | |
1258 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1259 | if (error < 0) |
1260 | goto out_free_server; | |
1261 | if (!IS_ERR(source->client_acl)) | |
1262 | nfs_init_server_aclclient(server); | |
1263 | ||
1264 | /* probe the filesystem info for this server filesystem */ | |
1265 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1266 | if (error < 0) | |
1267 | goto out_free_server; | |
1268 | ||
54af3bb5 TM |
1269 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1270 | server->namelen = NFS4_MAXNAMLEN; | |
1271 | ||
54ceac45 | 1272 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1273 | (unsigned long long) server->fsid.major, |
1274 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1275 | |
1276 | error = nfs_start_lockd(server); | |
1277 | if (error < 0) | |
1278 | goto out_free_server; | |
1279 | ||
1280 | spin_lock(&nfs_client_lock); | |
1281 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1282 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1283 | spin_unlock(&nfs_client_lock); | |
1284 | ||
1285 | server->mount_time = jiffies; | |
1286 | ||
1287 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1288 | return server; | |
1289 | ||
1290 | out_free_server: | |
1291 | nfs_free_server(server); | |
1292 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1293 | return ERR_PTR(error); | |
1294 | } | |
6aaca566 DH |
1295 | |
1296 | #ifdef CONFIG_PROC_FS | |
1297 | static struct proc_dir_entry *proc_fs_nfs; | |
1298 | ||
1299 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1300 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1301 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1302 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1303 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1304 | ||
1305 | static struct seq_operations nfs_server_list_ops = { | |
1306 | .start = nfs_server_list_start, | |
1307 | .next = nfs_server_list_next, | |
1308 | .stop = nfs_server_list_stop, | |
1309 | .show = nfs_server_list_show, | |
1310 | }; | |
1311 | ||
00977a59 | 1312 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1313 | .open = nfs_server_list_open, |
1314 | .read = seq_read, | |
1315 | .llseek = seq_lseek, | |
1316 | .release = seq_release, | |
1317 | }; | |
1318 | ||
1319 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1320 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1321 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1322 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1323 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1324 | ||
1325 | static struct seq_operations nfs_volume_list_ops = { | |
1326 | .start = nfs_volume_list_start, | |
1327 | .next = nfs_volume_list_next, | |
1328 | .stop = nfs_volume_list_stop, | |
1329 | .show = nfs_volume_list_show, | |
1330 | }; | |
1331 | ||
00977a59 | 1332 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1333 | .open = nfs_volume_list_open, |
1334 | .read = seq_read, | |
1335 | .llseek = seq_lseek, | |
1336 | .release = seq_release, | |
1337 | }; | |
1338 | ||
1339 | /* | |
1340 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1341 | * we're dealing | |
1342 | */ | |
1343 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1344 | { | |
1345 | struct seq_file *m; | |
1346 | int ret; | |
1347 | ||
1348 | ret = seq_open(file, &nfs_server_list_ops); | |
1349 | if (ret < 0) | |
1350 | return ret; | |
1351 | ||
1352 | m = file->private_data; | |
1353 | m->private = PDE(inode)->data; | |
1354 | ||
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * set up the iterator to start reading from the server list and return the first item | |
1360 | */ | |
1361 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1362 | { | |
6aaca566 DH |
1363 | /* lock the list against modification */ |
1364 | spin_lock(&nfs_client_lock); | |
259902ea | 1365 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1366 | } |
1367 | ||
1368 | /* | |
1369 | * move to next server | |
1370 | */ | |
1371 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1372 | { | |
259902ea | 1373 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1374 | } |
1375 | ||
1376 | /* | |
1377 | * clean up after reading from the transports list | |
1378 | */ | |
1379 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1380 | { | |
1381 | spin_unlock(&nfs_client_lock); | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * display a header line followed by a load of call lines | |
1386 | */ | |
1387 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1388 | { | |
1389 | struct nfs_client *clp; | |
1390 | ||
1391 | /* display header on line 1 */ | |
259902ea | 1392 | if (v == &nfs_client_list) { |
6aaca566 DH |
1393 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | /* display one transport per line on subsequent lines */ | |
1398 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1399 | ||
5d8515ca | 1400 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1401 | clp->rpc_ops->version, |
5d8515ca CL |
1402 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1403 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1404 | atomic_read(&clp->cl_count), |
1405 | clp->cl_hostname); | |
1406 | ||
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1412 | */ | |
1413 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1414 | { | |
1415 | struct seq_file *m; | |
1416 | int ret; | |
1417 | ||
1418 | ret = seq_open(file, &nfs_volume_list_ops); | |
1419 | if (ret < 0) | |
1420 | return ret; | |
1421 | ||
1422 | m = file->private_data; | |
1423 | m->private = PDE(inode)->data; | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * set up the iterator to start reading from the volume list and return the first item | |
1430 | */ | |
1431 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1432 | { | |
6aaca566 DH |
1433 | /* lock the list against modification */ |
1434 | spin_lock(&nfs_client_lock); | |
259902ea | 1435 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1436 | } |
1437 | ||
1438 | /* | |
1439 | * move to next volume | |
1440 | */ | |
1441 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1442 | { | |
259902ea | 1443 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1444 | } |
1445 | ||
1446 | /* | |
1447 | * clean up after reading from the transports list | |
1448 | */ | |
1449 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1450 | { | |
1451 | spin_unlock(&nfs_client_lock); | |
1452 | } | |
1453 | ||
1454 | /* | |
1455 | * display a header line followed by a load of call lines | |
1456 | */ | |
1457 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1458 | { | |
1459 | struct nfs_server *server; | |
1460 | struct nfs_client *clp; | |
1461 | char dev[8], fsid[17]; | |
1462 | ||
1463 | /* display header on line 1 */ | |
259902ea | 1464 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1465 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1466 | return 0; | |
1467 | } | |
1468 | /* display one transport per line on subsequent lines */ | |
1469 | server = list_entry(v, struct nfs_server, master_link); | |
1470 | clp = server->nfs_client; | |
1471 | ||
1472 | snprintf(dev, 8, "%u:%u", | |
1473 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1474 | ||
1475 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1476 | (unsigned long long) server->fsid.major, |
1477 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1478 | |
5d8515ca | 1479 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1480 | clp->rpc_ops->version, |
5d8515ca CL |
1481 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1482 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1483 | dev, |
1484 | fsid); | |
1485 | ||
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * initialise the /proc/fs/nfsfs/ directory | |
1491 | */ | |
1492 | int __init nfs_fs_proc_init(void) | |
1493 | { | |
1494 | struct proc_dir_entry *p; | |
1495 | ||
1496 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1497 | if (!proc_fs_nfs) | |
1498 | goto error_0; | |
1499 | ||
1500 | proc_fs_nfs->owner = THIS_MODULE; | |
1501 | ||
1502 | /* a file of servers with which we're dealing */ | |
1503 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1504 | if (!p) | |
1505 | goto error_1; | |
1506 | ||
1507 | p->proc_fops = &nfs_server_list_fops; | |
1508 | p->owner = THIS_MODULE; | |
1509 | ||
1510 | /* a file of volumes that we have mounted */ | |
1511 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1512 | if (!p) | |
1513 | goto error_2; | |
1514 | ||
1515 | p->proc_fops = &nfs_volume_list_fops; | |
1516 | p->owner = THIS_MODULE; | |
1517 | return 0; | |
1518 | ||
1519 | error_2: | |
1520 | remove_proc_entry("servers", proc_fs_nfs); | |
1521 | error_1: | |
1522 | remove_proc_entry("nfsfs", proc_root_fs); | |
1523 | error_0: | |
1524 | return -ENOMEM; | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * clean up the /proc/fs/nfsfs/ directory | |
1529 | */ | |
1530 | void nfs_fs_proc_exit(void) | |
1531 | { | |
1532 | remove_proc_entry("volumes", proc_fs_nfs); | |
1533 | remove_proc_entry("servers", proc_fs_nfs); | |
1534 | remove_proc_entry("nfsfs", proc_root_fs); | |
1535 | } | |
1536 | ||
1537 | #endif /* CONFIG_PROC_FS */ |