]>
Commit | Line | Data |
---|---|---|
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 | ||
33170233 | 685 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
686 | if (error < 0) |
687 | goto error; | |
688 | ||
689 | server->namelen = data->namlen; | |
690 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
691 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
692 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
693 | return 0; | |
694 | ||
695 | error: | |
696 | server->nfs_client = NULL; | |
697 | nfs_put_client(clp); | |
698 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
699 | return error; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Load up the server record from information gained in an fsinfo record | |
704 | */ | |
705 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
706 | { | |
707 | unsigned long max_rpc_payload; | |
708 | ||
709 | /* Work out a lot of parameters */ | |
710 | if (server->rsize == 0) | |
711 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
712 | if (server->wsize == 0) | |
713 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
714 | ||
715 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
716 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
717 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
718 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
719 | ||
720 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
721 | if (server->rsize > max_rpc_payload) | |
722 | server->rsize = max_rpc_payload; | |
723 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
724 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
725 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 726 | |
54ceac45 DH |
727 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
728 | ||
729 | if (server->wsize > max_rpc_payload) | |
730 | server->wsize = max_rpc_payload; | |
731 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
732 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
733 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
734 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
735 | ||
736 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
737 | if (server->dtsize > PAGE_CACHE_SIZE) | |
738 | server->dtsize = PAGE_CACHE_SIZE; | |
739 | if (server->dtsize > server->rsize) | |
740 | server->dtsize = server->rsize; | |
741 | ||
742 | if (server->flags & NFS_MOUNT_NOAC) { | |
743 | server->acregmin = server->acregmax = 0; | |
744 | server->acdirmin = server->acdirmax = 0; | |
745 | } | |
746 | ||
747 | server->maxfilesize = fsinfo->maxfilesize; | |
748 | ||
749 | /* We're airborne Set socket buffersize */ | |
750 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
751 | } | |
752 | ||
753 | /* | |
754 | * Probe filesystem information, including the FSID on v2/v3 | |
755 | */ | |
756 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
757 | { | |
758 | struct nfs_fsinfo fsinfo; | |
759 | struct nfs_client *clp = server->nfs_client; | |
760 | int error; | |
761 | ||
762 | dprintk("--> nfs_probe_fsinfo()\n"); | |
763 | ||
764 | if (clp->rpc_ops->set_capabilities != NULL) { | |
765 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
766 | if (error < 0) | |
767 | goto out_error; | |
768 | } | |
769 | ||
770 | fsinfo.fattr = fattr; | |
771 | nfs_fattr_init(fattr); | |
772 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
773 | if (error < 0) | |
774 | goto out_error; | |
775 | ||
776 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
777 | error = bdi_init(&server->backing_dev_info); |
778 | if (error) | |
779 | goto out_error; | |
780 | ||
54ceac45 DH |
781 | |
782 | /* Get some general file system info */ | |
783 | if (server->namelen == 0) { | |
784 | struct nfs_pathconf pathinfo; | |
785 | ||
786 | pathinfo.fattr = fattr; | |
787 | nfs_fattr_init(fattr); | |
788 | ||
789 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
790 | server->namelen = pathinfo.max_namelen; | |
791 | } | |
792 | ||
793 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
794 | return 0; | |
795 | ||
796 | out_error: | |
797 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
798 | return error; | |
799 | } | |
800 | ||
801 | /* | |
802 | * Copy useful information when duplicating a server record | |
803 | */ | |
804 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
805 | { | |
806 | target->flags = source->flags; | |
807 | target->acregmin = source->acregmin; | |
808 | target->acregmax = source->acregmax; | |
809 | target->acdirmin = source->acdirmin; | |
810 | target->acdirmax = source->acdirmax; | |
811 | target->caps = source->caps; | |
812 | } | |
813 | ||
814 | /* | |
815 | * Allocate and initialise a server record | |
816 | */ | |
817 | static struct nfs_server *nfs_alloc_server(void) | |
818 | { | |
819 | struct nfs_server *server; | |
820 | ||
821 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
822 | if (!server) | |
823 | return NULL; | |
824 | ||
825 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
826 | ||
827 | /* Zero out the NFS state stuff */ | |
828 | INIT_LIST_HEAD(&server->client_link); | |
829 | INIT_LIST_HEAD(&server->master_link); | |
830 | ||
ef818a28 SD |
831 | init_waitqueue_head(&server->active_wq); |
832 | atomic_set(&server->active, 0); | |
833 | ||
54ceac45 DH |
834 | server->io_stats = nfs_alloc_iostats(); |
835 | if (!server->io_stats) { | |
836 | kfree(server); | |
837 | return NULL; | |
838 | } | |
839 | ||
840 | return server; | |
841 | } | |
842 | ||
843 | /* | |
844 | * Free up a server record | |
845 | */ | |
846 | void nfs_free_server(struct nfs_server *server) | |
847 | { | |
848 | dprintk("--> nfs_free_server()\n"); | |
849 | ||
850 | spin_lock(&nfs_client_lock); | |
851 | list_del(&server->client_link); | |
852 | list_del(&server->master_link); | |
853 | spin_unlock(&nfs_client_lock); | |
854 | ||
855 | if (server->destroy != NULL) | |
856 | server->destroy(server); | |
5cef338b TM |
857 | |
858 | if (!IS_ERR(server->client_acl)) | |
859 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
860 | if (!IS_ERR(server->client)) |
861 | rpc_shutdown_client(server->client); | |
862 | ||
863 | nfs_put_client(server->nfs_client); | |
864 | ||
865 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 866 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
867 | kfree(server); |
868 | nfs_release_automount_timer(); | |
869 | dprintk("<-- nfs_free_server()\n"); | |
870 | } | |
871 | ||
872 | /* | |
873 | * Create a version 2 or 3 volume record | |
874 | * - keyed on server and FSID | |
875 | */ | |
2283f8d6 | 876 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
877 | struct nfs_fh *mntfh) |
878 | { | |
879 | struct nfs_server *server; | |
880 | struct nfs_fattr fattr; | |
881 | int error; | |
882 | ||
883 | server = nfs_alloc_server(); | |
884 | if (!server) | |
885 | return ERR_PTR(-ENOMEM); | |
886 | ||
887 | /* Get a client representation */ | |
888 | error = nfs_init_server(server, data); | |
889 | if (error < 0) | |
890 | goto error; | |
891 | ||
892 | BUG_ON(!server->nfs_client); | |
893 | BUG_ON(!server->nfs_client->rpc_ops); | |
894 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
895 | ||
896 | /* Probe the root fh to retrieve its FSID */ | |
897 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
898 | if (error < 0) | |
899 | goto error; | |
54af3bb5 TM |
900 | if (server->nfs_client->rpc_ops->version == 3) { |
901 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
902 | server->namelen = NFS3_MAXNAMLEN; | |
903 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
904 | server->caps |= NFS_CAP_READDIRPLUS; | |
905 | } else { | |
906 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
907 | server->namelen = NFS2_MAXNAMLEN; | |
908 | } | |
909 | ||
54ceac45 DH |
910 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
911 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
912 | if (error < 0) { | |
913 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
914 | goto error; | |
915 | } | |
916 | } | |
917 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
918 | ||
6daabf1b DH |
919 | dprintk("Server FSID: %llx:%llx\n", |
920 | (unsigned long long) server->fsid.major, | |
921 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
922 | |
923 | BUG_ON(!server->nfs_client); | |
924 | BUG_ON(!server->nfs_client->rpc_ops); | |
925 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
926 | ||
927 | spin_lock(&nfs_client_lock); | |
928 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
929 | list_add_tail(&server->master_link, &nfs_volume_list); | |
930 | spin_unlock(&nfs_client_lock); | |
931 | ||
932 | server->mount_time = jiffies; | |
933 | return server; | |
934 | ||
935 | error: | |
936 | nfs_free_server(server); | |
937 | return ERR_PTR(error); | |
938 | } | |
939 | ||
940 | #ifdef CONFIG_NFS_V4 | |
941 | /* | |
942 | * Initialise an NFS4 client record | |
943 | */ | |
944 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 945 | const struct rpc_timeout *timeparms, |
7d9ac06f | 946 | const char *ip_addr, |
54ceac45 DH |
947 | rpc_authflavor_t authflavour) |
948 | { | |
949 | int error; | |
950 | ||
951 | if (clp->cl_cons_state == NFS_CS_READY) { | |
952 | /* the client is initialised already */ | |
953 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
954 | return 0; | |
955 | } | |
956 | ||
957 | /* Check NFS protocol revision and initialize RPC op vector */ | |
958 | clp->rpc_ops = &nfs_v4_clientops; | |
959 | ||
59dca3b2 | 960 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
43d78ef2 | 961 | RPC_CLNT_CREATE_DISCRTRY); |
54ceac45 DH |
962 | if (error < 0) |
963 | goto error; | |
7d9ac06f | 964 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
965 | |
966 | error = nfs_idmap_new(clp); | |
967 | if (error < 0) { | |
968 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
969 | __FUNCTION__, error); | |
54ceac45 DH |
970 | goto error; |
971 | } | |
9c5bf38d | 972 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
973 | |
974 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
975 | return 0; | |
976 | ||
977 | error: | |
978 | nfs_mark_client_ready(clp, error); | |
979 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
980 | return error; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Set up an NFS4 client | |
985 | */ | |
986 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
987 | const char *hostname, |
988 | const struct sockaddr *addr, | |
989 | const size_t addrlen, | |
7d9ac06f | 990 | const char *ip_addr, |
54ceac45 | 991 | rpc_authflavor_t authflavour, |
33170233 | 992 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 993 | { |
3a498026 TM |
994 | struct nfs_client_initdata cl_init = { |
995 | .hostname = hostname, | |
dcecae0f CL |
996 | .addr = addr, |
997 | .addrlen = addrlen, | |
40c55319 | 998 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 999 | .proto = proto, |
3a498026 | 1000 | }; |
54ceac45 DH |
1001 | struct nfs_client *clp; |
1002 | int error; | |
1003 | ||
1004 | dprintk("--> nfs4_set_client()\n"); | |
1005 | ||
1006 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1007 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1008 | if (IS_ERR(clp)) { |
1009 | error = PTR_ERR(clp); | |
1010 | goto error; | |
1011 | } | |
59dca3b2 | 1012 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour); |
54ceac45 DH |
1013 | if (error < 0) |
1014 | goto error_put; | |
1015 | ||
1016 | server->nfs_client = clp; | |
1017 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1018 | return 0; | |
1019 | ||
1020 | error_put: | |
1021 | nfs_put_client(clp); | |
1022 | error: | |
1023 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1024 | return error; | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Create a version 4 volume record | |
1029 | */ | |
1030 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1031 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1032 | { |
33170233 | 1033 | struct rpc_timeout timeparms; |
54ceac45 DH |
1034 | int error; |
1035 | ||
1036 | dprintk("--> nfs4_init_server()\n"); | |
1037 | ||
33170233 TM |
1038 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1039 | data->timeo, data->retrans); | |
1040 | ||
1041 | /* Get a client record */ | |
1042 | error = nfs4_set_client(server, | |
1043 | data->nfs_server.hostname, | |
1044 | (const struct sockaddr *)&data->nfs_server.address, | |
1045 | data->nfs_server.addrlen, | |
1046 | data->client_address, | |
1047 | data->auth_flavors[0], | |
1048 | data->nfs_server.protocol, | |
1049 | &timeparms); | |
1050 | if (error < 0) | |
1051 | goto error; | |
1052 | ||
54ceac45 DH |
1053 | /* Initialise the client representation from the mount data */ |
1054 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
1055 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1056 | ||
1057 | if (data->rsize) | |
1058 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1059 | if (data->wsize) | |
1060 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1061 | ||
1062 | server->acregmin = data->acregmin * HZ; | |
1063 | server->acregmax = data->acregmax * HZ; | |
1064 | server->acdirmin = data->acdirmin * HZ; | |
1065 | server->acdirmax = data->acdirmax * HZ; | |
1066 | ||
33170233 | 1067 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1068 | |
33170233 | 1069 | error: |
54ceac45 DH |
1070 | /* Done */ |
1071 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1072 | return error; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Create a version 4 volume record | |
1077 | * - keyed on server and FSID | |
1078 | */ | |
91ea40b9 | 1079 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1080 | struct nfs_fh *mntfh) |
1081 | { | |
1082 | struct nfs_fattr fattr; | |
1083 | struct nfs_server *server; | |
1084 | int error; | |
1085 | ||
1086 | dprintk("--> nfs4_create_server()\n"); | |
1087 | ||
1088 | server = nfs_alloc_server(); | |
1089 | if (!server) | |
1090 | return ERR_PTR(-ENOMEM); | |
1091 | ||
54ceac45 | 1092 | /* set up the general RPC client */ |
91ea40b9 | 1093 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1094 | if (error < 0) |
1095 | goto error; | |
1096 | ||
1097 | BUG_ON(!server->nfs_client); | |
1098 | BUG_ON(!server->nfs_client->rpc_ops); | |
1099 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1100 | ||
1101 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1102 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1103 | if (error < 0) |
1104 | goto error; | |
1105 | ||
6daabf1b DH |
1106 | dprintk("Server FSID: %llx:%llx\n", |
1107 | (unsigned long long) server->fsid.major, | |
1108 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1109 | dprintk("Mount FH: %d\n", mntfh->size); |
1110 | ||
1111 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1112 | if (error < 0) | |
1113 | goto error; | |
1114 | ||
54af3bb5 TM |
1115 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1116 | server->namelen = NFS4_MAXNAMLEN; | |
1117 | ||
54ceac45 DH |
1118 | BUG_ON(!server->nfs_client); |
1119 | BUG_ON(!server->nfs_client->rpc_ops); | |
1120 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1121 | ||
1122 | spin_lock(&nfs_client_lock); | |
1123 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1124 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1125 | spin_unlock(&nfs_client_lock); | |
1126 | ||
1127 | server->mount_time = jiffies; | |
1128 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1129 | return server; | |
1130 | ||
1131 | error: | |
1132 | nfs_free_server(server); | |
1133 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1134 | return ERR_PTR(error); | |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * Create an NFS4 referral server record | |
1139 | */ | |
1140 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1141 | struct nfs_fh *mntfh) |
54ceac45 DH |
1142 | { |
1143 | struct nfs_client *parent_client; | |
1144 | struct nfs_server *server, *parent_server; | |
1145 | struct nfs_fattr fattr; | |
1146 | int error; | |
1147 | ||
1148 | dprintk("--> nfs4_create_referral_server()\n"); | |
1149 | ||
1150 | server = nfs_alloc_server(); | |
1151 | if (!server) | |
1152 | return ERR_PTR(-ENOMEM); | |
1153 | ||
1154 | parent_server = NFS_SB(data->sb); | |
1155 | parent_client = parent_server->nfs_client; | |
1156 | ||
1157 | /* Get a client representation. | |
1158 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1159 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1160 | data->addr, |
1161 | data->addrlen, | |
dcecae0f CL |
1162 | parent_client->cl_ipaddr, |
1163 | data->authflavor, | |
1164 | parent_server->client->cl_xprt->prot, | |
33170233 | 1165 | parent_server->client->cl_timeout); |
297de4f6 AA |
1166 | if (error < 0) |
1167 | goto error; | |
54ceac45 DH |
1168 | |
1169 | /* Initialise the client representation from the parent server */ | |
1170 | nfs_server_copy_userdata(server, parent_server); | |
1171 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1172 | ||
33170233 | 1173 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1174 | if (error < 0) |
1175 | goto error; | |
1176 | ||
1177 | BUG_ON(!server->nfs_client); | |
1178 | BUG_ON(!server->nfs_client->rpc_ops); | |
1179 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1180 | ||
f2d0d85e TM |
1181 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1182 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1183 | if (error < 0) | |
1184 | goto error; | |
1185 | ||
54ceac45 | 1186 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1187 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1188 | if (error < 0) |
1189 | goto error; | |
1190 | ||
54af3bb5 TM |
1191 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1192 | server->namelen = NFS4_MAXNAMLEN; | |
1193 | ||
54ceac45 | 1194 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1195 | (unsigned long long) server->fsid.major, |
1196 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1197 | |
1198 | spin_lock(&nfs_client_lock); | |
1199 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1200 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1201 | spin_unlock(&nfs_client_lock); | |
1202 | ||
1203 | server->mount_time = jiffies; | |
1204 | ||
1205 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1206 | return server; | |
1207 | ||
1208 | error: | |
1209 | nfs_free_server(server); | |
1210 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1211 | return ERR_PTR(error); | |
1212 | } | |
1213 | ||
1214 | #endif /* CONFIG_NFS_V4 */ | |
1215 | ||
1216 | /* | |
1217 | * Clone an NFS2, NFS3 or NFS4 server record | |
1218 | */ | |
1219 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1220 | struct nfs_fh *fh, | |
1221 | struct nfs_fattr *fattr) | |
1222 | { | |
1223 | struct nfs_server *server; | |
1224 | struct nfs_fattr fattr_fsinfo; | |
1225 | int error; | |
1226 | ||
1227 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1228 | (unsigned long long) fattr->fsid.major, |
1229 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1230 | |
1231 | server = nfs_alloc_server(); | |
1232 | if (!server) | |
1233 | return ERR_PTR(-ENOMEM); | |
1234 | ||
1235 | /* Copy data from the source */ | |
1236 | server->nfs_client = source->nfs_client; | |
1237 | atomic_inc(&server->nfs_client->cl_count); | |
1238 | nfs_server_copy_userdata(server, source); | |
1239 | ||
1240 | server->fsid = fattr->fsid; | |
1241 | ||
33170233 TM |
1242 | error = nfs_init_server_rpcclient(server, |
1243 | source->client->cl_timeout, | |
1244 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1245 | if (error < 0) |
1246 | goto out_free_server; | |
1247 | if (!IS_ERR(source->client_acl)) | |
1248 | nfs_init_server_aclclient(server); | |
1249 | ||
1250 | /* probe the filesystem info for this server filesystem */ | |
1251 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1252 | if (error < 0) | |
1253 | goto out_free_server; | |
1254 | ||
54af3bb5 TM |
1255 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1256 | server->namelen = NFS4_MAXNAMLEN; | |
1257 | ||
54ceac45 | 1258 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1259 | (unsigned long long) server->fsid.major, |
1260 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1261 | |
1262 | error = nfs_start_lockd(server); | |
1263 | if (error < 0) | |
1264 | goto out_free_server; | |
1265 | ||
1266 | spin_lock(&nfs_client_lock); | |
1267 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1268 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1269 | spin_unlock(&nfs_client_lock); | |
1270 | ||
1271 | server->mount_time = jiffies; | |
1272 | ||
1273 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1274 | return server; | |
1275 | ||
1276 | out_free_server: | |
1277 | nfs_free_server(server); | |
1278 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1279 | return ERR_PTR(error); | |
1280 | } | |
6aaca566 DH |
1281 | |
1282 | #ifdef CONFIG_PROC_FS | |
1283 | static struct proc_dir_entry *proc_fs_nfs; | |
1284 | ||
1285 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1286 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1287 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1288 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1289 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1290 | ||
1291 | static struct seq_operations nfs_server_list_ops = { | |
1292 | .start = nfs_server_list_start, | |
1293 | .next = nfs_server_list_next, | |
1294 | .stop = nfs_server_list_stop, | |
1295 | .show = nfs_server_list_show, | |
1296 | }; | |
1297 | ||
00977a59 | 1298 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1299 | .open = nfs_server_list_open, |
1300 | .read = seq_read, | |
1301 | .llseek = seq_lseek, | |
1302 | .release = seq_release, | |
1303 | }; | |
1304 | ||
1305 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1306 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1307 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1308 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1309 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1310 | ||
1311 | static struct seq_operations nfs_volume_list_ops = { | |
1312 | .start = nfs_volume_list_start, | |
1313 | .next = nfs_volume_list_next, | |
1314 | .stop = nfs_volume_list_stop, | |
1315 | .show = nfs_volume_list_show, | |
1316 | }; | |
1317 | ||
00977a59 | 1318 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1319 | .open = nfs_volume_list_open, |
1320 | .read = seq_read, | |
1321 | .llseek = seq_lseek, | |
1322 | .release = seq_release, | |
1323 | }; | |
1324 | ||
1325 | /* | |
1326 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1327 | * we're dealing | |
1328 | */ | |
1329 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1330 | { | |
1331 | struct seq_file *m; | |
1332 | int ret; | |
1333 | ||
1334 | ret = seq_open(file, &nfs_server_list_ops); | |
1335 | if (ret < 0) | |
1336 | return ret; | |
1337 | ||
1338 | m = file->private_data; | |
1339 | m->private = PDE(inode)->data; | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | /* | |
1345 | * set up the iterator to start reading from the server list and return the first item | |
1346 | */ | |
1347 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1348 | { | |
6aaca566 DH |
1349 | /* lock the list against modification */ |
1350 | spin_lock(&nfs_client_lock); | |
259902ea | 1351 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1352 | } |
1353 | ||
1354 | /* | |
1355 | * move to next server | |
1356 | */ | |
1357 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1358 | { | |
259902ea | 1359 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1360 | } |
1361 | ||
1362 | /* | |
1363 | * clean up after reading from the transports list | |
1364 | */ | |
1365 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1366 | { | |
1367 | spin_unlock(&nfs_client_lock); | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * display a header line followed by a load of call lines | |
1372 | */ | |
1373 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1374 | { | |
1375 | struct nfs_client *clp; | |
1376 | ||
1377 | /* display header on line 1 */ | |
259902ea | 1378 | if (v == &nfs_client_list) { |
6aaca566 DH |
1379 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | /* display one transport per line on subsequent lines */ | |
1384 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1385 | ||
5d8515ca | 1386 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1387 | clp->rpc_ops->version, |
5d8515ca CL |
1388 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1389 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1390 | atomic_read(&clp->cl_count), |
1391 | clp->cl_hostname); | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1398 | */ | |
1399 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1400 | { | |
1401 | struct seq_file *m; | |
1402 | int ret; | |
1403 | ||
1404 | ret = seq_open(file, &nfs_volume_list_ops); | |
1405 | if (ret < 0) | |
1406 | return ret; | |
1407 | ||
1408 | m = file->private_data; | |
1409 | m->private = PDE(inode)->data; | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * set up the iterator to start reading from the volume list and return the first item | |
1416 | */ | |
1417 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1418 | { | |
6aaca566 DH |
1419 | /* lock the list against modification */ |
1420 | spin_lock(&nfs_client_lock); | |
259902ea | 1421 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1422 | } |
1423 | ||
1424 | /* | |
1425 | * move to next volume | |
1426 | */ | |
1427 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1428 | { | |
259902ea | 1429 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1430 | } |
1431 | ||
1432 | /* | |
1433 | * clean up after reading from the transports list | |
1434 | */ | |
1435 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1436 | { | |
1437 | spin_unlock(&nfs_client_lock); | |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * display a header line followed by a load of call lines | |
1442 | */ | |
1443 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1444 | { | |
1445 | struct nfs_server *server; | |
1446 | struct nfs_client *clp; | |
1447 | char dev[8], fsid[17]; | |
1448 | ||
1449 | /* display header on line 1 */ | |
259902ea | 1450 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1451 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1452 | return 0; | |
1453 | } | |
1454 | /* display one transport per line on subsequent lines */ | |
1455 | server = list_entry(v, struct nfs_server, master_link); | |
1456 | clp = server->nfs_client; | |
1457 | ||
1458 | snprintf(dev, 8, "%u:%u", | |
1459 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1460 | ||
1461 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1462 | (unsigned long long) server->fsid.major, |
1463 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1464 | |
5d8515ca | 1465 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1466 | clp->rpc_ops->version, |
5d8515ca CL |
1467 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1468 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1469 | dev, |
1470 | fsid); | |
1471 | ||
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * initialise the /proc/fs/nfsfs/ directory | |
1477 | */ | |
1478 | int __init nfs_fs_proc_init(void) | |
1479 | { | |
1480 | struct proc_dir_entry *p; | |
1481 | ||
1482 | proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs); | |
1483 | if (!proc_fs_nfs) | |
1484 | goto error_0; | |
1485 | ||
1486 | proc_fs_nfs->owner = THIS_MODULE; | |
1487 | ||
1488 | /* a file of servers with which we're dealing */ | |
1489 | p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1490 | if (!p) | |
1491 | goto error_1; | |
1492 | ||
1493 | p->proc_fops = &nfs_server_list_fops; | |
1494 | p->owner = THIS_MODULE; | |
1495 | ||
1496 | /* a file of volumes that we have mounted */ | |
1497 | p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs); | |
1498 | if (!p) | |
1499 | goto error_2; | |
1500 | ||
1501 | p->proc_fops = &nfs_volume_list_fops; | |
1502 | p->owner = THIS_MODULE; | |
1503 | return 0; | |
1504 | ||
1505 | error_2: | |
1506 | remove_proc_entry("servers", proc_fs_nfs); | |
1507 | error_1: | |
1508 | remove_proc_entry("nfsfs", proc_root_fs); | |
1509 | error_0: | |
1510 | return -ENOMEM; | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * clean up the /proc/fs/nfsfs/ directory | |
1515 | */ | |
1516 | void nfs_fs_proc_exit(void) | |
1517 | { | |
1518 | remove_proc_entry("volumes", proc_fs_nfs); | |
1519 | remove_proc_entry("servers", proc_fs_nfs); | |
1520 | remove_proc_entry("nfsfs", proc_root_fs); | |
1521 | } | |
1522 | ||
1523 | #endif /* CONFIG_PROC_FS */ |