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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" | |
14727281 | 48 | #include "fscache.h" |
24c8dbbb DH |
49 | |
50 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
51 | ||
52 | static DEFINE_SPINLOCK(nfs_client_lock); | |
53 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 54 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
55 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
56 | ||
5006a76c DH |
57 | /* |
58 | * RPC cruft for NFS | |
59 | */ | |
60 | static struct rpc_version *nfs_version[5] = { | |
61 | [2] = &nfs_version2, | |
62 | #ifdef CONFIG_NFS_V3 | |
63 | [3] = &nfs_version3, | |
64 | #endif | |
65 | #ifdef CONFIG_NFS_V4 | |
66 | [4] = &nfs_version4, | |
67 | #endif | |
68 | }; | |
69 | ||
70 | struct rpc_program nfs_program = { | |
71 | .name = "nfs", | |
72 | .number = NFS_PROGRAM, | |
73 | .nrvers = ARRAY_SIZE(nfs_version), | |
74 | .version = nfs_version, | |
75 | .stats = &nfs_rpcstat, | |
76 | .pipe_dir_name = "/nfs", | |
77 | }; | |
78 | ||
79 | struct rpc_stat nfs_rpcstat = { | |
80 | .program = &nfs_program | |
81 | }; | |
82 | ||
83 | ||
84 | #ifdef CONFIG_NFS_V3_ACL | |
85 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
86 | static struct rpc_version * nfsacl_version[] = { | |
87 | [3] = &nfsacl_version3, | |
88 | }; | |
89 | ||
90 | struct rpc_program nfsacl_program = { | |
91 | .name = "nfsacl", | |
92 | .number = NFS_ACL_PROGRAM, | |
93 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
94 | .version = nfsacl_version, | |
95 | .stats = &nfsacl_rpcstat, | |
96 | }; | |
97 | #endif /* CONFIG_NFS_V3_ACL */ | |
98 | ||
3a498026 TM |
99 | struct nfs_client_initdata { |
100 | const char *hostname; | |
d7422c47 | 101 | const struct sockaddr *addr; |
6e4cffd7 | 102 | size_t addrlen; |
40c55319 | 103 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 104 | int proto; |
3a498026 TM |
105 | }; |
106 | ||
24c8dbbb DH |
107 | /* |
108 | * Allocate a shared client record | |
109 | * | |
110 | * Since these are allocated/deallocated very rarely, we don't | |
111 | * bother putting them in a slab cache... | |
112 | */ | |
3a498026 | 113 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
114 | { |
115 | struct nfs_client *clp; | |
7c67db3a | 116 | struct rpc_cred *cred; |
24c8dbbb DH |
117 | |
118 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
119 | goto error_0; | |
120 | ||
40c55319 TM |
121 | clp->rpc_ops = cl_init->rpc_ops; |
122 | ||
123 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
124 | if (nfs_callback_up() < 0) |
125 | goto error_2; | |
126 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
127 | } | |
128 | ||
129 | atomic_set(&clp->cl_count, 1); | |
130 | clp->cl_cons_state = NFS_CS_INITING; | |
131 | ||
6e4cffd7 CL |
132 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
133 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 134 | |
3a498026 TM |
135 | if (cl_init->hostname) { |
136 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
137 | if (!clp->cl_hostname) |
138 | goto error_3; | |
139 | } | |
140 | ||
141 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
142 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
143 | ||
59dca3b2 TM |
144 | clp->cl_proto = cl_init->proto; |
145 | ||
24c8dbbb | 146 | #ifdef CONFIG_NFS_V4 |
24c8dbbb | 147 | INIT_LIST_HEAD(&clp->cl_delegations); |
24c8dbbb | 148 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 149 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
150 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
151 | clp->cl_boot_time = CURRENT_TIME; | |
152 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
153 | #endif | |
7c67db3a TM |
154 | cred = rpc_lookup_machine_cred(); |
155 | if (!IS_ERR(cred)) | |
156 | clp->cl_machine_cred = cred; | |
24c8dbbb | 157 | |
14727281 DH |
158 | nfs_fscache_get_client_cookie(clp); |
159 | ||
24c8dbbb DH |
160 | return clp; |
161 | ||
162 | error_3: | |
9c5bf38d TM |
163 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
164 | nfs_callback_down(); | |
24c8dbbb | 165 | error_2: |
24c8dbbb DH |
166 | kfree(clp); |
167 | error_0: | |
168 | return NULL; | |
169 | } | |
170 | ||
5dd3177a TM |
171 | static void nfs4_shutdown_client(struct nfs_client *clp) |
172 | { | |
173 | #ifdef CONFIG_NFS_V4 | |
174 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
175 | nfs4_kill_renewd(clp); | |
9f958ab8 | 176 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
177 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
178 | nfs_idmap_delete(clp); | |
f6a1cc89 TM |
179 | |
180 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
5dd3177a TM |
181 | #endif |
182 | } | |
183 | ||
24c8dbbb DH |
184 | /* |
185 | * Destroy a shared client record | |
186 | */ | |
187 | static void nfs_free_client(struct nfs_client *clp) | |
188 | { | |
40c55319 | 189 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 190 | |
5dd3177a | 191 | nfs4_shutdown_client(clp); |
24c8dbbb | 192 | |
14727281 DH |
193 | nfs_fscache_release_client_cookie(clp); |
194 | ||
24c8dbbb DH |
195 | /* -EIO all pending I/O */ |
196 | if (!IS_ERR(clp->cl_rpcclient)) | |
197 | rpc_shutdown_client(clp->cl_rpcclient); | |
198 | ||
199 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
200 | nfs_callback_down(); | |
201 | ||
7c67db3a TM |
202 | if (clp->cl_machine_cred != NULL) |
203 | put_rpccred(clp->cl_machine_cred); | |
204 | ||
24c8dbbb DH |
205 | kfree(clp->cl_hostname); |
206 | kfree(clp); | |
207 | ||
208 | dprintk("<-- nfs_free_client()\n"); | |
209 | } | |
210 | ||
211 | /* | |
212 | * Release a reference to a shared client record | |
213 | */ | |
214 | void nfs_put_client(struct nfs_client *clp) | |
215 | { | |
27ba8512 DH |
216 | if (!clp) |
217 | return; | |
218 | ||
24c8dbbb DH |
219 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
220 | ||
221 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
222 | list_del(&clp->cl_share_link); | |
223 | spin_unlock(&nfs_client_lock); | |
224 | ||
225 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
226 | ||
227 | nfs_free_client(clp); | |
228 | } | |
229 | } | |
230 | ||
9082a5cc | 231 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
232 | /* |
233 | * Test if two ip6 socket addresses refer to the same socket by | |
234 | * comparing relevant fields. The padding bytes specifically, are not | |
235 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
236 | * and sin6_scope_id is only compared if the address is "link local" | |
237 | * because "link local" addresses need only be unique to a specific | |
238 | * link. Conversely, ordinary unicast addresses might have different | |
239 | * sin6_scope_id. | |
240 | * | |
241 | * The caller should ensure both socket addresses are AF_INET6. | |
242 | */ | |
3c8c45df CL |
243 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
244 | const struct sockaddr *sa2) | |
9f4c899c | 245 | { |
3c8c45df CL |
246 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
247 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 248 | |
3c8c45df CL |
249 | if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && |
250 | sin1->sin6_scope_id != sin2->sin6_scope_id) | |
9f4c899c | 251 | return 0; |
3b0d3f93 | 252 | |
3c8c45df | 253 | return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr); |
3b0d3f93 | 254 | } |
3c8c45df CL |
255 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
256 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
257 | const struct sockaddr *sa2) | |
9f4c899c TM |
258 | { |
259 | return 0; | |
260 | } | |
9082a5cc | 261 | #endif |
3b0d3f93 | 262 | |
d7371c41 ID |
263 | /* |
264 | * Test if two ip4 socket addresses refer to the same socket, by | |
265 | * comparing relevant fields. The padding bytes specifically, are | |
266 | * not compared. | |
267 | * | |
268 | * The caller should ensure both socket addresses are AF_INET. | |
269 | */ | |
3c8c45df CL |
270 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
271 | const struct sockaddr *sa2) | |
272 | { | |
273 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
274 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
275 | ||
276 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
277 | } | |
278 | ||
279 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
280 | const struct sockaddr *sa2) | |
281 | { | |
282 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
283 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
284 | ||
285 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
286 | (sin1->sin6_port == sin2->sin6_port); | |
287 | } | |
288 | ||
9f4c899c TM |
289 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
290 | const struct sockaddr *sa2) | |
d7371c41 | 291 | { |
3c8c45df CL |
292 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
293 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 294 | |
3c8c45df CL |
295 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
296 | (sin1->sin_port == sin2->sin_port); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Test if two socket addresses represent the same actual socket, | |
301 | * by comparing (only) relevant fields, excluding the port number. | |
302 | */ | |
303 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
304 | const struct sockaddr *sa2) | |
305 | { | |
306 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 307 | return 0; |
3c8c45df CL |
308 | |
309 | switch (sa1->sa_family) { | |
310 | case AF_INET: | |
311 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
312 | case AF_INET6: | |
313 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
314 | } | |
315 | return 0; | |
d7371c41 ID |
316 | } |
317 | ||
d7371c41 ID |
318 | /* |
319 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 320 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
321 | */ |
322 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
323 | const struct sockaddr *sa2) | |
324 | { | |
325 | if (sa1->sa_family != sa2->sa_family) | |
326 | return 0; | |
327 | ||
328 | switch (sa1->sa_family) { | |
329 | case AF_INET: | |
9f4c899c | 330 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 331 | case AF_INET6: |
9f4c899c | 332 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
333 | } |
334 | return 0; | |
335 | } | |
336 | ||
24c8dbbb | 337 | /* |
c81468a1 TM |
338 | * Find a client by IP address and protocol version |
339 | * - returns NULL if no such client | |
24c8dbbb | 340 | */ |
ff052645 | 341 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
342 | { |
343 | struct nfs_client *clp; | |
344 | ||
c81468a1 | 345 | spin_lock(&nfs_client_lock); |
24c8dbbb | 346 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
347 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
348 | ||
13bbc06a | 349 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 350 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
351 | continue; |
352 | ||
24c8dbbb | 353 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 354 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
355 | continue; |
356 | ||
c81468a1 | 357 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 358 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
359 | continue; |
360 | ||
c81468a1 TM |
361 | atomic_inc(&clp->cl_count); |
362 | spin_unlock(&nfs_client_lock); | |
363 | return clp; | |
24c8dbbb | 364 | } |
c81468a1 | 365 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 366 | return NULL; |
24c8dbbb DH |
367 | } |
368 | ||
3fbd67ad TM |
369 | /* |
370 | * Find a client by IP address and protocol version | |
371 | * - returns NULL if no such client | |
372 | */ | |
373 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
374 | { | |
375 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
376 | u32 nfsvers = clp->rpc_ops->version; | |
377 | ||
378 | spin_lock(&nfs_client_lock); | |
379 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
380 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
381 | ||
382 | /* Don't match clients that failed to initialise properly */ | |
383 | if (clp->cl_cons_state != NFS_CS_READY) | |
384 | continue; | |
385 | ||
386 | /* Different NFS versions cannot share the same nfs_client */ | |
387 | if (clp->rpc_ops->version != nfsvers) | |
388 | continue; | |
389 | ||
3fbd67ad TM |
390 | /* Match only the IP address, not the port number */ |
391 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
392 | continue; | |
393 | ||
394 | atomic_inc(&clp->cl_count); | |
395 | spin_unlock(&nfs_client_lock); | |
396 | return clp; | |
397 | } | |
398 | spin_unlock(&nfs_client_lock); | |
399 | return NULL; | |
400 | } | |
401 | ||
24c8dbbb | 402 | /* |
c81468a1 TM |
403 | * Find an nfs_client on the list that matches the initialisation data |
404 | * that is supplied. | |
24c8dbbb | 405 | */ |
c81468a1 | 406 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
407 | { |
408 | struct nfs_client *clp; | |
d7371c41 | 409 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 410 | |
c81468a1 | 411 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 412 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
413 | /* Don't match clients that failed to initialise properly */ |
414 | if (clp->cl_cons_state < 0) | |
415 | continue; | |
416 | ||
417 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 418 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
419 | continue; |
420 | ||
59dca3b2 TM |
421 | if (clp->cl_proto != data->proto) |
422 | continue; | |
423 | ||
c81468a1 | 424 | /* Match the full socket address */ |
d7371c41 | 425 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
426 | continue; |
427 | ||
428 | atomic_inc(&clp->cl_count); | |
429 | return clp; | |
13bbc06a | 430 | } |
c81468a1 | 431 | return NULL; |
24c8dbbb DH |
432 | } |
433 | ||
434 | /* | |
435 | * Look up a client by IP address and protocol version | |
436 | * - creates a new record if one doesn't yet exist | |
437 | */ | |
3a498026 | 438 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
439 | { |
440 | struct nfs_client *clp, *new = NULL; | |
441 | int error; | |
442 | ||
d7422c47 CL |
443 | dprintk("--> nfs_get_client(%s,v%u)\n", |
444 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
445 | |
446 | /* see if the client already exists */ | |
447 | do { | |
448 | spin_lock(&nfs_client_lock); | |
449 | ||
c81468a1 | 450 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
451 | if (clp) |
452 | goto found_client; | |
453 | if (new) | |
454 | goto install_client; | |
455 | ||
456 | spin_unlock(&nfs_client_lock); | |
457 | ||
3a498026 | 458 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
459 | } while (new); |
460 | ||
461 | return ERR_PTR(-ENOMEM); | |
462 | ||
463 | /* install a new client and return with it unready */ | |
464 | install_client: | |
465 | clp = new; | |
466 | list_add(&clp->cl_share_link, &nfs_client_list); | |
467 | spin_unlock(&nfs_client_lock); | |
468 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
469 | return clp; | |
470 | ||
471 | /* found an existing client | |
472 | * - make sure it's ready before returning | |
473 | */ | |
474 | found_client: | |
475 | spin_unlock(&nfs_client_lock); | |
476 | ||
477 | if (new) | |
478 | nfs_free_client(new); | |
479 | ||
150030b7 | 480 | error = wait_event_killable(nfs_client_active_wq, |
0bae89ec TM |
481 | clp->cl_cons_state != NFS_CS_INITING); |
482 | if (error < 0) { | |
483 | nfs_put_client(clp); | |
484 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
485 | } |
486 | ||
487 | if (clp->cl_cons_state < NFS_CS_READY) { | |
488 | error = clp->cl_cons_state; | |
489 | nfs_put_client(clp); | |
490 | return ERR_PTR(error); | |
491 | } | |
492 | ||
54ceac45 DH |
493 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
494 | ||
24c8dbbb DH |
495 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
496 | return clp; | |
497 | } | |
498 | ||
499 | /* | |
500 | * Mark a server as ready or failed | |
501 | */ | |
54ceac45 | 502 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
503 | { |
504 | clp->cl_cons_state = state; | |
505 | wake_up_all(&nfs_client_active_wq); | |
506 | } | |
5006a76c DH |
507 | |
508 | /* | |
509 | * Initialise the timeout values for a connection | |
510 | */ | |
511 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
512 | unsigned int timeo, unsigned int retrans) | |
513 | { | |
514 | to->to_initval = timeo * HZ / 10; | |
515 | to->to_retries = retrans; | |
5006a76c DH |
516 | |
517 | switch (proto) { | |
0896a725 | 518 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 519 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
520 | if (to->to_retries == 0) |
521 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 522 | if (to->to_initval == 0) |
259875ef | 523 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
524 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
525 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
526 | to->to_increment = to->to_initval; | |
527 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
528 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
529 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
530 | if (to->to_maxval < to->to_initval) | |
531 | to->to_maxval = to->to_initval; | |
5006a76c DH |
532 | to->to_exponential = 0; |
533 | break; | |
0896a725 | 534 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
535 | if (to->to_retries == 0) |
536 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 537 | if (!to->to_initval) |
259875ef | 538 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
539 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
540 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
541 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
542 | to->to_exponential = 1; | |
543 | break; | |
259875ef TM |
544 | default: |
545 | BUG(); | |
5006a76c DH |
546 | } |
547 | } | |
548 | ||
549 | /* | |
550 | * Create an RPC client handle | |
551 | */ | |
59dca3b2 | 552 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
553 | const struct rpc_timeout *timeparms, |
554 | rpc_authflavor_t flavor, | |
4a01b8a4 | 555 | int discrtry, int noresvport) |
5006a76c | 556 | { |
5006a76c | 557 | struct rpc_clnt *clnt = NULL; |
41877d20 | 558 | struct rpc_create_args args = { |
59dca3b2 | 559 | .protocol = clp->cl_proto, |
41877d20 | 560 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 561 | .addrsize = clp->cl_addrlen, |
33170233 | 562 | .timeout = timeparms, |
41877d20 CL |
563 | .servername = clp->cl_hostname, |
564 | .program = &nfs_program, | |
565 | .version = clp->rpc_ops->version, | |
566 | .authflavor = flavor, | |
567 | }; | |
5006a76c | 568 | |
4a01b8a4 CL |
569 | if (discrtry) |
570 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
571 | if (noresvport) | |
572 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
573 | ||
5006a76c DH |
574 | if (!IS_ERR(clp->cl_rpcclient)) |
575 | return 0; | |
576 | ||
41877d20 | 577 | clnt = rpc_create(&args); |
5006a76c DH |
578 | if (IS_ERR(clnt)) { |
579 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 580 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
581 | return PTR_ERR(clnt); |
582 | } | |
583 | ||
5006a76c DH |
584 | clp->cl_rpcclient = clnt; |
585 | return 0; | |
586 | } | |
54ceac45 DH |
587 | |
588 | /* | |
589 | * Version 2 or 3 client destruction | |
590 | */ | |
591 | static void nfs_destroy_server(struct nfs_server *server) | |
592 | { | |
54ceac45 | 593 | if (!(server->flags & NFS_MOUNT_NONLM)) |
9289e7f9 | 594 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
595 | } |
596 | ||
597 | /* | |
598 | * Version 2 or 3 lockd setup | |
599 | */ | |
600 | static int nfs_start_lockd(struct nfs_server *server) | |
601 | { | |
9289e7f9 CL |
602 | struct nlm_host *host; |
603 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
604 | struct nlmclnt_initdata nlm_init = { |
605 | .hostname = clp->cl_hostname, | |
606 | .address = (struct sockaddr *)&clp->cl_addr, | |
607 | .addrlen = clp->cl_addrlen, | |
608 | .protocol = server->flags & NFS_MOUNT_TCP ? | |
609 | IPPROTO_TCP : IPPROTO_UDP, | |
610 | .nfs_version = clp->rpc_ops->version, | |
0cb2659b CL |
611 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
612 | 1 : 0, | |
883bb163 | 613 | }; |
54ceac45 | 614 | |
883bb163 | 615 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 616 | return 0; |
54ceac45 | 617 | if (server->flags & NFS_MOUNT_NONLM) |
9289e7f9 CL |
618 | return 0; |
619 | ||
883bb163 | 620 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
621 | if (IS_ERR(host)) |
622 | return PTR_ERR(host); | |
623 | ||
624 | server->nlm_host = host; | |
625 | server->destroy = nfs_destroy_server; | |
626 | return 0; | |
54ceac45 DH |
627 | } |
628 | ||
629 | /* | |
630 | * Initialise an NFSv3 ACL client connection | |
631 | */ | |
632 | #ifdef CONFIG_NFS_V3_ACL | |
633 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
634 | { | |
40c55319 | 635 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
636 | goto out_noacl; |
637 | if (server->flags & NFS_MOUNT_NOACL) | |
638 | goto out_noacl; | |
639 | ||
640 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
641 | if (IS_ERR(server->client_acl)) | |
642 | goto out_noacl; | |
643 | ||
644 | /* No errors! Assume that Sun nfsacls are supported */ | |
645 | server->caps |= NFS_CAP_ACLS; | |
646 | return; | |
647 | ||
648 | out_noacl: | |
649 | server->caps &= ~NFS_CAP_ACLS; | |
650 | } | |
651 | #else | |
652 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
653 | { | |
654 | server->flags &= ~NFS_MOUNT_NOACL; | |
655 | server->caps &= ~NFS_CAP_ACLS; | |
656 | } | |
657 | #endif | |
658 | ||
659 | /* | |
660 | * Create a general RPC client | |
661 | */ | |
33170233 TM |
662 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
663 | const struct rpc_timeout *timeo, | |
664 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
665 | { |
666 | struct nfs_client *clp = server->nfs_client; | |
667 | ||
668 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
669 | if (IS_ERR(server->client)) { | |
3110ff80 | 670 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
671 | return PTR_ERR(server->client); |
672 | } | |
673 | ||
33170233 TM |
674 | memcpy(&server->client->cl_timeout_default, |
675 | timeo, | |
676 | sizeof(server->client->cl_timeout_default)); | |
677 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
678 | ||
54ceac45 DH |
679 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
680 | struct rpc_auth *auth; | |
681 | ||
682 | auth = rpcauth_create(pseudoflavour, server->client); | |
683 | if (IS_ERR(auth)) { | |
3110ff80 | 684 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
685 | return PTR_ERR(auth); |
686 | } | |
687 | } | |
688 | server->client->cl_softrtry = 0; | |
689 | if (server->flags & NFS_MOUNT_SOFT) | |
690 | server->client->cl_softrtry = 1; | |
691 | ||
54ceac45 DH |
692 | return 0; |
693 | } | |
694 | ||
695 | /* | |
696 | * Initialise an NFS2 or NFS3 client | |
697 | */ | |
2283f8d6 | 698 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 699 | const struct rpc_timeout *timeparms, |
2283f8d6 | 700 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 701 | { |
54ceac45 DH |
702 | int error; |
703 | ||
704 | if (clp->cl_cons_state == NFS_CS_READY) { | |
705 | /* the client is already initialised */ | |
706 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
707 | return 0; | |
708 | } | |
709 | ||
54ceac45 DH |
710 | /* |
711 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
712 | * - RFC 2623, sec 2.3.2 | |
713 | */ | |
d740351b CL |
714 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
715 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
716 | if (error < 0) |
717 | goto error; | |
718 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
719 | return 0; | |
720 | ||
721 | error: | |
722 | nfs_mark_client_ready(clp, error); | |
723 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
724 | return error; | |
725 | } | |
726 | ||
727 | /* | |
728 | * Create a version 2 or 3 client | |
729 | */ | |
2283f8d6 TT |
730 | static int nfs_init_server(struct nfs_server *server, |
731 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 732 | { |
3a498026 TM |
733 | struct nfs_client_initdata cl_init = { |
734 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 735 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 736 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 737 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 738 | .proto = data->nfs_server.protocol, |
3a498026 | 739 | }; |
33170233 | 740 | struct rpc_timeout timeparms; |
54ceac45 | 741 | struct nfs_client *clp; |
3a498026 | 742 | int error; |
54ceac45 DH |
743 | |
744 | dprintk("--> nfs_init_server()\n"); | |
745 | ||
746 | #ifdef CONFIG_NFS_V3 | |
747 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 748 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
749 | #endif |
750 | ||
751 | /* Allocate or find a client reference we can use */ | |
3a498026 | 752 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
753 | if (IS_ERR(clp)) { |
754 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
755 | return PTR_ERR(clp); | |
756 | } | |
757 | ||
33170233 TM |
758 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
759 | data->timeo, data->retrans); | |
760 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
761 | if (error < 0) |
762 | goto error; | |
763 | ||
764 | server->nfs_client = clp; | |
765 | ||
766 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 767 | server->flags = data->flags; |
54ceac45 DH |
768 | |
769 | if (data->rsize) | |
770 | server->rsize = nfs_block_size(data->rsize, NULL); | |
771 | if (data->wsize) | |
772 | server->wsize = nfs_block_size(data->wsize, NULL); | |
773 | ||
774 | server->acregmin = data->acregmin * HZ; | |
775 | server->acregmax = data->acregmax * HZ; | |
776 | server->acdirmin = data->acdirmin * HZ; | |
777 | server->acdirmax = data->acdirmax * HZ; | |
778 | ||
779 | /* Start lockd here, before we might error out */ | |
780 | error = nfs_start_lockd(server); | |
781 | if (error < 0) | |
782 | goto error; | |
783 | ||
f22d6d79 CL |
784 | server->port = data->nfs_server.port; |
785 | ||
33170233 | 786 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
787 | if (error < 0) |
788 | goto error; | |
789 | ||
3f8400d1 CL |
790 | /* Preserve the values of mount_server-related mount options */ |
791 | if (data->mount_server.addrlen) { | |
792 | memcpy(&server->mountd_address, &data->mount_server.address, | |
793 | data->mount_server.addrlen); | |
794 | server->mountd_addrlen = data->mount_server.addrlen; | |
795 | } | |
796 | server->mountd_version = data->mount_server.version; | |
797 | server->mountd_port = data->mount_server.port; | |
798 | server->mountd_protocol = data->mount_server.protocol; | |
799 | ||
54ceac45 DH |
800 | server->namelen = data->namlen; |
801 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
802 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
803 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
804 | return 0; | |
805 | ||
806 | error: | |
807 | server->nfs_client = NULL; | |
808 | nfs_put_client(clp); | |
809 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
810 | return error; | |
811 | } | |
812 | ||
813 | /* | |
814 | * Load up the server record from information gained in an fsinfo record | |
815 | */ | |
816 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
817 | { | |
818 | unsigned long max_rpc_payload; | |
819 | ||
820 | /* Work out a lot of parameters */ | |
821 | if (server->rsize == 0) | |
822 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
823 | if (server->wsize == 0) | |
824 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
825 | ||
826 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
827 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
828 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
829 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
830 | ||
831 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
832 | if (server->rsize > max_rpc_payload) | |
833 | server->rsize = max_rpc_payload; | |
834 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
835 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
836 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 837 | |
54ceac45 DH |
838 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
839 | ||
840 | if (server->wsize > max_rpc_payload) | |
841 | server->wsize = max_rpc_payload; | |
842 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
843 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
844 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
845 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
846 | ||
847 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
848 | if (server->dtsize > PAGE_CACHE_SIZE) | |
849 | server->dtsize = PAGE_CACHE_SIZE; | |
850 | if (server->dtsize > server->rsize) | |
851 | server->dtsize = server->rsize; | |
852 | ||
853 | if (server->flags & NFS_MOUNT_NOAC) { | |
854 | server->acregmin = server->acregmax = 0; | |
855 | server->acdirmin = server->acdirmax = 0; | |
856 | } | |
857 | ||
858 | server->maxfilesize = fsinfo->maxfilesize; | |
859 | ||
860 | /* We're airborne Set socket buffersize */ | |
861 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
862 | } | |
863 | ||
864 | /* | |
865 | * Probe filesystem information, including the FSID on v2/v3 | |
866 | */ | |
867 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
868 | { | |
869 | struct nfs_fsinfo fsinfo; | |
870 | struct nfs_client *clp = server->nfs_client; | |
871 | int error; | |
872 | ||
873 | dprintk("--> nfs_probe_fsinfo()\n"); | |
874 | ||
875 | if (clp->rpc_ops->set_capabilities != NULL) { | |
876 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
877 | if (error < 0) | |
878 | goto out_error; | |
879 | } | |
880 | ||
881 | fsinfo.fattr = fattr; | |
882 | nfs_fattr_init(fattr); | |
883 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
884 | if (error < 0) | |
885 | goto out_error; | |
886 | ||
887 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
888 | error = bdi_init(&server->backing_dev_info); |
889 | if (error) | |
890 | goto out_error; | |
891 | ||
54ceac45 DH |
892 | |
893 | /* Get some general file system info */ | |
894 | if (server->namelen == 0) { | |
895 | struct nfs_pathconf pathinfo; | |
896 | ||
897 | pathinfo.fattr = fattr; | |
898 | nfs_fattr_init(fattr); | |
899 | ||
900 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
901 | server->namelen = pathinfo.max_namelen; | |
902 | } | |
903 | ||
904 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
905 | return 0; | |
906 | ||
907 | out_error: | |
908 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
909 | return error; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Copy useful information when duplicating a server record | |
914 | */ | |
915 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
916 | { | |
917 | target->flags = source->flags; | |
918 | target->acregmin = source->acregmin; | |
919 | target->acregmax = source->acregmax; | |
920 | target->acdirmin = source->acdirmin; | |
921 | target->acdirmax = source->acdirmax; | |
922 | target->caps = source->caps; | |
923 | } | |
924 | ||
925 | /* | |
926 | * Allocate and initialise a server record | |
927 | */ | |
928 | static struct nfs_server *nfs_alloc_server(void) | |
929 | { | |
930 | struct nfs_server *server; | |
931 | ||
932 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
933 | if (!server) | |
934 | return NULL; | |
935 | ||
936 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
937 | ||
938 | /* Zero out the NFS state stuff */ | |
939 | INIT_LIST_HEAD(&server->client_link); | |
940 | INIT_LIST_HEAD(&server->master_link); | |
941 | ||
ef818a28 SD |
942 | atomic_set(&server->active, 0); |
943 | ||
54ceac45 DH |
944 | server->io_stats = nfs_alloc_iostats(); |
945 | if (!server->io_stats) { | |
946 | kfree(server); | |
947 | return NULL; | |
948 | } | |
949 | ||
950 | return server; | |
951 | } | |
952 | ||
953 | /* | |
954 | * Free up a server record | |
955 | */ | |
956 | void nfs_free_server(struct nfs_server *server) | |
957 | { | |
958 | dprintk("--> nfs_free_server()\n"); | |
959 | ||
960 | spin_lock(&nfs_client_lock); | |
961 | list_del(&server->client_link); | |
962 | list_del(&server->master_link); | |
963 | spin_unlock(&nfs_client_lock); | |
964 | ||
965 | if (server->destroy != NULL) | |
966 | server->destroy(server); | |
5cef338b TM |
967 | |
968 | if (!IS_ERR(server->client_acl)) | |
969 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
970 | if (!IS_ERR(server->client)) |
971 | rpc_shutdown_client(server->client); | |
972 | ||
973 | nfs_put_client(server->nfs_client); | |
974 | ||
975 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 976 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
977 | kfree(server); |
978 | nfs_release_automount_timer(); | |
979 | dprintk("<-- nfs_free_server()\n"); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Create a version 2 or 3 volume record | |
984 | * - keyed on server and FSID | |
985 | */ | |
2283f8d6 | 986 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
987 | struct nfs_fh *mntfh) |
988 | { | |
989 | struct nfs_server *server; | |
990 | struct nfs_fattr fattr; | |
991 | int error; | |
992 | ||
993 | server = nfs_alloc_server(); | |
994 | if (!server) | |
995 | return ERR_PTR(-ENOMEM); | |
996 | ||
997 | /* Get a client representation */ | |
998 | error = nfs_init_server(server, data); | |
999 | if (error < 0) | |
1000 | goto error; | |
1001 | ||
1002 | BUG_ON(!server->nfs_client); | |
1003 | BUG_ON(!server->nfs_client->rpc_ops); | |
1004 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1005 | ||
1006 | /* Probe the root fh to retrieve its FSID */ | |
1007 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1008 | if (error < 0) | |
1009 | goto error; | |
54af3bb5 TM |
1010 | if (server->nfs_client->rpc_ops->version == 3) { |
1011 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1012 | server->namelen = NFS3_MAXNAMLEN; | |
1013 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1014 | server->caps |= NFS_CAP_READDIRPLUS; | |
1015 | } else { | |
1016 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1017 | server->namelen = NFS2_MAXNAMLEN; | |
1018 | } | |
1019 | ||
54ceac45 DH |
1020 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
1021 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
1022 | if (error < 0) { | |
1023 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1024 | goto error; | |
1025 | } | |
1026 | } | |
1027 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
1028 | ||
6daabf1b DH |
1029 | dprintk("Server FSID: %llx:%llx\n", |
1030 | (unsigned long long) server->fsid.major, | |
1031 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1032 | |
1033 | BUG_ON(!server->nfs_client); | |
1034 | BUG_ON(!server->nfs_client->rpc_ops); | |
1035 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1036 | ||
1037 | spin_lock(&nfs_client_lock); | |
1038 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1039 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1040 | spin_unlock(&nfs_client_lock); | |
1041 | ||
1042 | server->mount_time = jiffies; | |
1043 | return server; | |
1044 | ||
1045 | error: | |
1046 | nfs_free_server(server); | |
1047 | return ERR_PTR(error); | |
1048 | } | |
1049 | ||
1050 | #ifdef CONFIG_NFS_V4 | |
1051 | /* | |
1052 | * Initialise an NFS4 client record | |
1053 | */ | |
1054 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 1055 | const struct rpc_timeout *timeparms, |
7d9ac06f | 1056 | const char *ip_addr, |
d740351b CL |
1057 | rpc_authflavor_t authflavour, |
1058 | int flags) | |
54ceac45 DH |
1059 | { |
1060 | int error; | |
1061 | ||
1062 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1063 | /* the client is initialised already */ | |
1064 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1069 | clp->rpc_ops = &nfs_v4_clientops; | |
1070 | ||
59dca3b2 | 1071 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1072 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1073 | if (error < 0) |
1074 | goto error; | |
7d9ac06f | 1075 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1076 | |
1077 | error = nfs_idmap_new(clp); | |
1078 | if (error < 0) { | |
1079 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1080 | __func__, error); |
54ceac45 DH |
1081 | goto error; |
1082 | } | |
9c5bf38d | 1083 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
1084 | |
1085 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
1086 | return 0; | |
1087 | ||
1088 | error: | |
1089 | nfs_mark_client_ready(clp, error); | |
1090 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1091 | return error; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Set up an NFS4 client | |
1096 | */ | |
1097 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1098 | const char *hostname, |
1099 | const struct sockaddr *addr, | |
1100 | const size_t addrlen, | |
7d9ac06f | 1101 | const char *ip_addr, |
54ceac45 | 1102 | rpc_authflavor_t authflavour, |
33170233 | 1103 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 1104 | { |
3a498026 TM |
1105 | struct nfs_client_initdata cl_init = { |
1106 | .hostname = hostname, | |
dcecae0f CL |
1107 | .addr = addr, |
1108 | .addrlen = addrlen, | |
40c55319 | 1109 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1110 | .proto = proto, |
3a498026 | 1111 | }; |
54ceac45 DH |
1112 | struct nfs_client *clp; |
1113 | int error; | |
1114 | ||
1115 | dprintk("--> nfs4_set_client()\n"); | |
1116 | ||
1117 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1118 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1119 | if (IS_ERR(clp)) { |
1120 | error = PTR_ERR(clp); | |
1121 | goto error; | |
1122 | } | |
d740351b CL |
1123 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1124 | server->flags); | |
54ceac45 DH |
1125 | if (error < 0) |
1126 | goto error_put; | |
1127 | ||
1128 | server->nfs_client = clp; | |
1129 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1130 | return 0; | |
1131 | ||
1132 | error_put: | |
1133 | nfs_put_client(clp); | |
1134 | error: | |
1135 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1136 | return error; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Create a version 4 volume record | |
1141 | */ | |
1142 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1143 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1144 | { |
33170233 | 1145 | struct rpc_timeout timeparms; |
54ceac45 DH |
1146 | int error; |
1147 | ||
1148 | dprintk("--> nfs4_init_server()\n"); | |
1149 | ||
33170233 TM |
1150 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1151 | data->timeo, data->retrans); | |
1152 | ||
542fcc33 CL |
1153 | /* Initialise the client representation from the mount data */ |
1154 | server->flags = data->flags; | |
1155 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1156 | ||
33170233 TM |
1157 | /* Get a client record */ |
1158 | error = nfs4_set_client(server, | |
1159 | data->nfs_server.hostname, | |
1160 | (const struct sockaddr *)&data->nfs_server.address, | |
1161 | data->nfs_server.addrlen, | |
1162 | data->client_address, | |
1163 | data->auth_flavors[0], | |
1164 | data->nfs_server.protocol, | |
1165 | &timeparms); | |
1166 | if (error < 0) | |
1167 | goto error; | |
1168 | ||
54ceac45 DH |
1169 | if (data->rsize) |
1170 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1171 | if (data->wsize) | |
1172 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1173 | ||
1174 | server->acregmin = data->acregmin * HZ; | |
1175 | server->acregmax = data->acregmax * HZ; | |
1176 | server->acdirmin = data->acdirmin * HZ; | |
1177 | server->acdirmax = data->acdirmax * HZ; | |
1178 | ||
f22d6d79 CL |
1179 | server->port = data->nfs_server.port; |
1180 | ||
33170233 | 1181 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1182 | |
33170233 | 1183 | error: |
54ceac45 DH |
1184 | /* Done */ |
1185 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1186 | return error; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * Create a version 4 volume record | |
1191 | * - keyed on server and FSID | |
1192 | */ | |
91ea40b9 | 1193 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1194 | struct nfs_fh *mntfh) |
1195 | { | |
1196 | struct nfs_fattr fattr; | |
1197 | struct nfs_server *server; | |
1198 | int error; | |
1199 | ||
1200 | dprintk("--> nfs4_create_server()\n"); | |
1201 | ||
1202 | server = nfs_alloc_server(); | |
1203 | if (!server) | |
1204 | return ERR_PTR(-ENOMEM); | |
1205 | ||
54ceac45 | 1206 | /* set up the general RPC client */ |
91ea40b9 | 1207 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1208 | if (error < 0) |
1209 | goto error; | |
1210 | ||
1211 | BUG_ON(!server->nfs_client); | |
1212 | BUG_ON(!server->nfs_client->rpc_ops); | |
1213 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1214 | ||
1215 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1216 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1217 | if (error < 0) |
1218 | goto error; | |
1219 | ||
6daabf1b DH |
1220 | dprintk("Server FSID: %llx:%llx\n", |
1221 | (unsigned long long) server->fsid.major, | |
1222 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1223 | dprintk("Mount FH: %d\n", mntfh->size); |
1224 | ||
1225 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1226 | if (error < 0) | |
1227 | goto error; | |
1228 | ||
54af3bb5 TM |
1229 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1230 | server->namelen = NFS4_MAXNAMLEN; | |
1231 | ||
54ceac45 DH |
1232 | BUG_ON(!server->nfs_client); |
1233 | BUG_ON(!server->nfs_client->rpc_ops); | |
1234 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1235 | ||
1236 | spin_lock(&nfs_client_lock); | |
1237 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1238 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1239 | spin_unlock(&nfs_client_lock); | |
1240 | ||
1241 | server->mount_time = jiffies; | |
1242 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1243 | return server; | |
1244 | ||
1245 | error: | |
1246 | nfs_free_server(server); | |
1247 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1248 | return ERR_PTR(error); | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Create an NFS4 referral server record | |
1253 | */ | |
1254 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1255 | struct nfs_fh *mntfh) |
54ceac45 DH |
1256 | { |
1257 | struct nfs_client *parent_client; | |
1258 | struct nfs_server *server, *parent_server; | |
1259 | struct nfs_fattr fattr; | |
1260 | int error; | |
1261 | ||
1262 | dprintk("--> nfs4_create_referral_server()\n"); | |
1263 | ||
1264 | server = nfs_alloc_server(); | |
1265 | if (!server) | |
1266 | return ERR_PTR(-ENOMEM); | |
1267 | ||
1268 | parent_server = NFS_SB(data->sb); | |
1269 | parent_client = parent_server->nfs_client; | |
1270 | ||
542fcc33 CL |
1271 | /* Initialise the client representation from the parent server */ |
1272 | nfs_server_copy_userdata(server, parent_server); | |
1273 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1274 | ||
54ceac45 DH |
1275 | /* Get a client representation. |
1276 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1277 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1278 | data->addr, |
1279 | data->addrlen, | |
dcecae0f CL |
1280 | parent_client->cl_ipaddr, |
1281 | data->authflavor, | |
1282 | parent_server->client->cl_xprt->prot, | |
33170233 | 1283 | parent_server->client->cl_timeout); |
297de4f6 AA |
1284 | if (error < 0) |
1285 | goto error; | |
54ceac45 | 1286 | |
33170233 | 1287 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1288 | if (error < 0) |
1289 | goto error; | |
1290 | ||
1291 | BUG_ON(!server->nfs_client); | |
1292 | BUG_ON(!server->nfs_client->rpc_ops); | |
1293 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1294 | ||
f2d0d85e TM |
1295 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1296 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1297 | if (error < 0) | |
1298 | goto error; | |
1299 | ||
54ceac45 | 1300 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1301 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1302 | if (error < 0) |
1303 | goto error; | |
1304 | ||
54af3bb5 TM |
1305 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1306 | server->namelen = NFS4_MAXNAMLEN; | |
1307 | ||
54ceac45 | 1308 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1309 | (unsigned long long) server->fsid.major, |
1310 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1311 | |
1312 | spin_lock(&nfs_client_lock); | |
1313 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1314 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1315 | spin_unlock(&nfs_client_lock); | |
1316 | ||
1317 | server->mount_time = jiffies; | |
1318 | ||
1319 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1320 | return server; | |
1321 | ||
1322 | error: | |
1323 | nfs_free_server(server); | |
1324 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1325 | return ERR_PTR(error); | |
1326 | } | |
1327 | ||
1328 | #endif /* CONFIG_NFS_V4 */ | |
1329 | ||
1330 | /* | |
1331 | * Clone an NFS2, NFS3 or NFS4 server record | |
1332 | */ | |
1333 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1334 | struct nfs_fh *fh, | |
1335 | struct nfs_fattr *fattr) | |
1336 | { | |
1337 | struct nfs_server *server; | |
1338 | struct nfs_fattr fattr_fsinfo; | |
1339 | int error; | |
1340 | ||
1341 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1342 | (unsigned long long) fattr->fsid.major, |
1343 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1344 | |
1345 | server = nfs_alloc_server(); | |
1346 | if (!server) | |
1347 | return ERR_PTR(-ENOMEM); | |
1348 | ||
1349 | /* Copy data from the source */ | |
1350 | server->nfs_client = source->nfs_client; | |
1351 | atomic_inc(&server->nfs_client->cl_count); | |
1352 | nfs_server_copy_userdata(server, source); | |
1353 | ||
1354 | server->fsid = fattr->fsid; | |
1355 | ||
33170233 TM |
1356 | error = nfs_init_server_rpcclient(server, |
1357 | source->client->cl_timeout, | |
1358 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1359 | if (error < 0) |
1360 | goto out_free_server; | |
1361 | if (!IS_ERR(source->client_acl)) | |
1362 | nfs_init_server_aclclient(server); | |
1363 | ||
1364 | /* probe the filesystem info for this server filesystem */ | |
1365 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1366 | if (error < 0) | |
1367 | goto out_free_server; | |
1368 | ||
54af3bb5 TM |
1369 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1370 | server->namelen = NFS4_MAXNAMLEN; | |
1371 | ||
54ceac45 | 1372 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1373 | (unsigned long long) server->fsid.major, |
1374 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1375 | |
1376 | error = nfs_start_lockd(server); | |
1377 | if (error < 0) | |
1378 | goto out_free_server; | |
1379 | ||
1380 | spin_lock(&nfs_client_lock); | |
1381 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1382 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1383 | spin_unlock(&nfs_client_lock); | |
1384 | ||
1385 | server->mount_time = jiffies; | |
1386 | ||
1387 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1388 | return server; | |
1389 | ||
1390 | out_free_server: | |
1391 | nfs_free_server(server); | |
1392 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1393 | return ERR_PTR(error); | |
1394 | } | |
6aaca566 DH |
1395 | |
1396 | #ifdef CONFIG_PROC_FS | |
1397 | static struct proc_dir_entry *proc_fs_nfs; | |
1398 | ||
1399 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1400 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1401 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1402 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1403 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1404 | ||
1405 | static struct seq_operations nfs_server_list_ops = { | |
1406 | .start = nfs_server_list_start, | |
1407 | .next = nfs_server_list_next, | |
1408 | .stop = nfs_server_list_stop, | |
1409 | .show = nfs_server_list_show, | |
1410 | }; | |
1411 | ||
00977a59 | 1412 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1413 | .open = nfs_server_list_open, |
1414 | .read = seq_read, | |
1415 | .llseek = seq_lseek, | |
1416 | .release = seq_release, | |
34b37235 | 1417 | .owner = THIS_MODULE, |
6aaca566 DH |
1418 | }; |
1419 | ||
1420 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1421 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1422 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1423 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1424 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1425 | ||
1426 | static struct seq_operations nfs_volume_list_ops = { | |
1427 | .start = nfs_volume_list_start, | |
1428 | .next = nfs_volume_list_next, | |
1429 | .stop = nfs_volume_list_stop, | |
1430 | .show = nfs_volume_list_show, | |
1431 | }; | |
1432 | ||
00977a59 | 1433 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1434 | .open = nfs_volume_list_open, |
1435 | .read = seq_read, | |
1436 | .llseek = seq_lseek, | |
1437 | .release = seq_release, | |
34b37235 | 1438 | .owner = THIS_MODULE, |
6aaca566 DH |
1439 | }; |
1440 | ||
1441 | /* | |
1442 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1443 | * we're dealing | |
1444 | */ | |
1445 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1446 | { | |
1447 | struct seq_file *m; | |
1448 | int ret; | |
1449 | ||
1450 | ret = seq_open(file, &nfs_server_list_ops); | |
1451 | if (ret < 0) | |
1452 | return ret; | |
1453 | ||
1454 | m = file->private_data; | |
1455 | m->private = PDE(inode)->data; | |
1456 | ||
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | * set up the iterator to start reading from the server list and return the first item | |
1462 | */ | |
1463 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1464 | { | |
6aaca566 DH |
1465 | /* lock the list against modification */ |
1466 | spin_lock(&nfs_client_lock); | |
259902ea | 1467 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1468 | } |
1469 | ||
1470 | /* | |
1471 | * move to next server | |
1472 | */ | |
1473 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1474 | { | |
259902ea | 1475 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1476 | } |
1477 | ||
1478 | /* | |
1479 | * clean up after reading from the transports list | |
1480 | */ | |
1481 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1482 | { | |
1483 | spin_unlock(&nfs_client_lock); | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * display a header line followed by a load of call lines | |
1488 | */ | |
1489 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1490 | { | |
1491 | struct nfs_client *clp; | |
1492 | ||
1493 | /* display header on line 1 */ | |
259902ea | 1494 | if (v == &nfs_client_list) { |
6aaca566 DH |
1495 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /* display one transport per line on subsequent lines */ | |
1500 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1501 | ||
5d8515ca | 1502 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1503 | clp->rpc_ops->version, |
5d8515ca CL |
1504 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1505 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1506 | atomic_read(&clp->cl_count), |
1507 | clp->cl_hostname); | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1514 | */ | |
1515 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1516 | { | |
1517 | struct seq_file *m; | |
1518 | int ret; | |
1519 | ||
1520 | ret = seq_open(file, &nfs_volume_list_ops); | |
1521 | if (ret < 0) | |
1522 | return ret; | |
1523 | ||
1524 | m = file->private_data; | |
1525 | m->private = PDE(inode)->data; | |
1526 | ||
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * set up the iterator to start reading from the volume list and return the first item | |
1532 | */ | |
1533 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1534 | { | |
6aaca566 DH |
1535 | /* lock the list against modification */ |
1536 | spin_lock(&nfs_client_lock); | |
259902ea | 1537 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1538 | } |
1539 | ||
1540 | /* | |
1541 | * move to next volume | |
1542 | */ | |
1543 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1544 | { | |
259902ea | 1545 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1546 | } |
1547 | ||
1548 | /* | |
1549 | * clean up after reading from the transports list | |
1550 | */ | |
1551 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1552 | { | |
1553 | spin_unlock(&nfs_client_lock); | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * display a header line followed by a load of call lines | |
1558 | */ | |
1559 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1560 | { | |
1561 | struct nfs_server *server; | |
1562 | struct nfs_client *clp; | |
1563 | char dev[8], fsid[17]; | |
1564 | ||
1565 | /* display header on line 1 */ | |
259902ea | 1566 | if (v == &nfs_volume_list) { |
5d1acff1 | 1567 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1568 | return 0; |
1569 | } | |
1570 | /* display one transport per line on subsequent lines */ | |
1571 | server = list_entry(v, struct nfs_server, master_link); | |
1572 | clp = server->nfs_client; | |
1573 | ||
1574 | snprintf(dev, 8, "%u:%u", | |
1575 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1576 | ||
1577 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1578 | (unsigned long long) server->fsid.major, |
1579 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1580 | |
5d1acff1 | 1581 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1582 | clp->rpc_ops->version, |
5d8515ca CL |
1583 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1584 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1585 | dev, |
5d1acff1 DH |
1586 | fsid, |
1587 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1588 | |
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * initialise the /proc/fs/nfsfs/ directory | |
1594 | */ | |
1595 | int __init nfs_fs_proc_init(void) | |
1596 | { | |
1597 | struct proc_dir_entry *p; | |
1598 | ||
36a5aeb8 | 1599 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1600 | if (!proc_fs_nfs) |
1601 | goto error_0; | |
1602 | ||
6aaca566 | 1603 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1604 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1605 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1606 | if (!p) |
1607 | goto error_1; | |
1608 | ||
6aaca566 | 1609 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1610 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1611 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1612 | if (!p) |
1613 | goto error_2; | |
6aaca566 DH |
1614 | return 0; |
1615 | ||
1616 | error_2: | |
1617 | remove_proc_entry("servers", proc_fs_nfs); | |
1618 | error_1: | |
36a5aeb8 | 1619 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1620 | error_0: |
1621 | return -ENOMEM; | |
1622 | } | |
1623 | ||
1624 | /* | |
1625 | * clean up the /proc/fs/nfsfs/ directory | |
1626 | */ | |
1627 | void nfs_fs_proc_exit(void) | |
1628 | { | |
1629 | remove_proc_entry("volumes", proc_fs_nfs); | |
1630 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1631 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1632 | } |
1633 | ||
1634 | #endif /* CONFIG_PROC_FS */ |