Commit | Line | Data |
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24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 TM |
37 | #include <linux/in6.h> |
38 | #include <net/ipv6.h> | |
24c8dbbb DH |
39 | #include <linux/nfs_xdr.h> |
40 | ||
41 | #include <asm/system.h> | |
42 | ||
43 | #include "nfs4_fs.h" | |
44 | #include "callback.h" | |
45 | #include "delegation.h" | |
46 | #include "iostat.h" | |
47 | #include "internal.h" | |
48 | ||
49 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
50 | ||
51 | static DEFINE_SPINLOCK(nfs_client_lock); | |
52 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 53 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
54 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
55 | ||
5006a76c DH |
56 | /* |
57 | * RPC cruft for NFS | |
58 | */ | |
59 | static struct rpc_version *nfs_version[5] = { | |
60 | [2] = &nfs_version2, | |
61 | #ifdef CONFIG_NFS_V3 | |
62 | [3] = &nfs_version3, | |
63 | #endif | |
64 | #ifdef CONFIG_NFS_V4 | |
65 | [4] = &nfs_version4, | |
66 | #endif | |
67 | }; | |
68 | ||
69 | struct rpc_program nfs_program = { | |
70 | .name = "nfs", | |
71 | .number = NFS_PROGRAM, | |
72 | .nrvers = ARRAY_SIZE(nfs_version), | |
73 | .version = nfs_version, | |
74 | .stats = &nfs_rpcstat, | |
75 | .pipe_dir_name = "/nfs", | |
76 | }; | |
77 | ||
78 | struct rpc_stat nfs_rpcstat = { | |
79 | .program = &nfs_program | |
80 | }; | |
81 | ||
82 | ||
83 | #ifdef CONFIG_NFS_V3_ACL | |
84 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
85 | static struct rpc_version * nfsacl_version[] = { | |
86 | [3] = &nfsacl_version3, | |
87 | }; | |
88 | ||
89 | struct rpc_program nfsacl_program = { | |
90 | .name = "nfsacl", | |
91 | .number = NFS_ACL_PROGRAM, | |
92 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
93 | .version = nfsacl_version, | |
94 | .stats = &nfsacl_rpcstat, | |
95 | }; | |
96 | #endif /* CONFIG_NFS_V3_ACL */ | |
97 | ||
3a498026 TM |
98 | struct nfs_client_initdata { |
99 | const char *hostname; | |
d7422c47 | 100 | const struct sockaddr *addr; |
6e4cffd7 | 101 | size_t addrlen; |
40c55319 | 102 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 103 | int proto; |
3a498026 TM |
104 | }; |
105 | ||
24c8dbbb DH |
106 | /* |
107 | * Allocate a shared client record | |
108 | * | |
109 | * Since these are allocated/deallocated very rarely, we don't | |
110 | * bother putting them in a slab cache... | |
111 | */ | |
3a498026 | 112 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
113 | { |
114 | struct nfs_client *clp; | |
7c67db3a | 115 | struct rpc_cred *cred; |
24c8dbbb DH |
116 | |
117 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
118 | goto error_0; | |
119 | ||
40c55319 TM |
120 | clp->rpc_ops = cl_init->rpc_ops; |
121 | ||
122 | if (cl_init->rpc_ops->version == 4) { | |
24c8dbbb DH |
123 | if (nfs_callback_up() < 0) |
124 | goto error_2; | |
125 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
126 | } | |
127 | ||
128 | atomic_set(&clp->cl_count, 1); | |
129 | clp->cl_cons_state = NFS_CS_INITING; | |
130 | ||
6e4cffd7 CL |
131 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
132 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 133 | |
3a498026 TM |
134 | if (cl_init->hostname) { |
135 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
24c8dbbb DH |
136 | if (!clp->cl_hostname) |
137 | goto error_3; | |
138 | } | |
139 | ||
140 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
141 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
142 | ||
59dca3b2 TM |
143 | clp->cl_proto = cl_init->proto; |
144 | ||
24c8dbbb | 145 | #ifdef CONFIG_NFS_V4 |
24c8dbbb | 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 | |
7c67db3a TM |
153 | cred = rpc_lookup_machine_cred(); |
154 | if (!IS_ERR(cred)) | |
155 | clp->cl_machine_cred = cred; | |
24c8dbbb DH |
156 | |
157 | return clp; | |
158 | ||
159 | error_3: | |
9c5bf38d TM |
160 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
161 | nfs_callback_down(); | |
24c8dbbb | 162 | error_2: |
24c8dbbb DH |
163 | kfree(clp); |
164 | error_0: | |
165 | return NULL; | |
166 | } | |
167 | ||
5dd3177a TM |
168 | static void nfs4_shutdown_client(struct nfs_client *clp) |
169 | { | |
170 | #ifdef CONFIG_NFS_V4 | |
171 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
172 | nfs4_kill_renewd(clp); | |
9f958ab8 | 173 | BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners)); |
5dd3177a TM |
174 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
175 | nfs_idmap_delete(clp); | |
f6a1cc89 TM |
176 | |
177 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
5dd3177a TM |
178 | #endif |
179 | } | |
180 | ||
24c8dbbb DH |
181 | /* |
182 | * Destroy a shared client record | |
183 | */ | |
184 | static void nfs_free_client(struct nfs_client *clp) | |
185 | { | |
40c55319 | 186 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 187 | |
5dd3177a | 188 | nfs4_shutdown_client(clp); |
24c8dbbb DH |
189 | |
190 | /* -EIO all pending I/O */ | |
191 | if (!IS_ERR(clp->cl_rpcclient)) | |
192 | rpc_shutdown_client(clp->cl_rpcclient); | |
193 | ||
194 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
195 | nfs_callback_down(); | |
196 | ||
7c67db3a TM |
197 | if (clp->cl_machine_cred != NULL) |
198 | put_rpccred(clp->cl_machine_cred); | |
199 | ||
24c8dbbb DH |
200 | kfree(clp->cl_hostname); |
201 | kfree(clp); | |
202 | ||
203 | dprintk("<-- nfs_free_client()\n"); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Release a reference to a shared client record | |
208 | */ | |
209 | void nfs_put_client(struct nfs_client *clp) | |
210 | { | |
27ba8512 DH |
211 | if (!clp) |
212 | return; | |
213 | ||
24c8dbbb DH |
214 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
215 | ||
216 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
217 | list_del(&clp->cl_share_link); | |
218 | spin_unlock(&nfs_client_lock); | |
219 | ||
220 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
221 | ||
222 | nfs_free_client(clp); | |
223 | } | |
224 | } | |
225 | ||
9082a5cc TM |
226 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
227 | static const struct in6_addr *nfs_map_ipv4_addr(const struct sockaddr *sa, struct in6_addr *addr_mapped) | |
3b0d3f93 | 228 | { |
9082a5cc TM |
229 | switch (sa->sa_family) { |
230 | default: | |
231 | return NULL; | |
232 | case AF_INET6: | |
233 | return &((const struct sockaddr_in6 *)sa)->sin6_addr; | |
234 | break; | |
235 | case AF_INET: | |
236 | ipv6_addr_set_v4mapped(((const struct sockaddr_in *)sa)->sin_addr.s_addr, | |
237 | addr_mapped); | |
238 | return addr_mapped; | |
239 | } | |
3b0d3f93 TM |
240 | } |
241 | ||
9082a5cc TM |
242 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, |
243 | const struct sockaddr *sa2) | |
3b0d3f93 | 244 | { |
9082a5cc TM |
245 | const struct in6_addr *addr1; |
246 | const struct in6_addr *addr2; | |
247 | struct in6_addr addr1_mapped; | |
248 | struct in6_addr addr2_mapped; | |
249 | ||
250 | addr1 = nfs_map_ipv4_addr(sa1, &addr1_mapped); | |
251 | if (likely(addr1 != NULL)) { | |
252 | addr2 = nfs_map_ipv4_addr(sa2, &addr2_mapped); | |
253 | if (likely(addr2 != NULL)) | |
254 | return ipv6_addr_equal(addr1, addr2); | |
255 | } | |
256 | return 0; | |
257 | } | |
9f4c899c TM |
258 | |
259 | /* | |
260 | * Test if two ip6 socket addresses refer to the same socket by | |
261 | * comparing relevant fields. The padding bytes specifically, are not | |
262 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
263 | * and sin6_scope_id is only compared if the address is "link local" | |
264 | * because "link local" addresses need only be unique to a specific | |
265 | * link. Conversely, ordinary unicast addresses might have different | |
266 | * sin6_scope_id. | |
267 | * | |
268 | * The caller should ensure both socket addresses are AF_INET6. | |
269 | */ | |
270 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
271 | const struct sockaddr *sa2) | |
272 | { | |
273 | const struct sockaddr_in6 *saddr1 = (const struct sockaddr_in6 *)sa1; | |
274 | const struct sockaddr_in6 *saddr2 = (const struct sockaddr_in6 *)sa2; | |
275 | ||
276 | if (!ipv6_addr_equal(&saddr1->sin6_addr, | |
277 | &saddr1->sin6_addr)) | |
278 | return 0; | |
279 | if (ipv6_addr_scope(&saddr1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && | |
280 | saddr1->sin6_scope_id != saddr2->sin6_scope_id) | |
281 | return 0; | |
282 | return saddr1->sin6_port == saddr2->sin6_port; | |
283 | } | |
9082a5cc TM |
284 | #else |
285 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr_in *sa1, | |
286 | const struct sockaddr_in *sa2) | |
287 | { | |
288 | return sa1->sin_addr.s_addr == sa2->sin_addr.s_addr; | |
3b0d3f93 TM |
289 | } |
290 | ||
291 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
292 | const struct sockaddr *sa2) | |
293 | { | |
9082a5cc TM |
294 | if (unlikely(sa1->sa_family != AF_INET || sa2->sa_family != AF_INET)) |
295 | return 0; | |
296 | return nfs_sockaddr_match_ipaddr4((const struct sockaddr_in *)sa1, | |
297 | (const struct sockaddr_in *)sa2); | |
3b0d3f93 | 298 | } |
9f4c899c TM |
299 | |
300 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr * sa1, | |
301 | const struct sockaddr * sa2) | |
302 | { | |
303 | return 0; | |
304 | } | |
9082a5cc | 305 | #endif |
3b0d3f93 | 306 | |
d7371c41 ID |
307 | /* |
308 | * Test if two ip4 socket addresses refer to the same socket, by | |
309 | * comparing relevant fields. The padding bytes specifically, are | |
310 | * not compared. | |
311 | * | |
312 | * The caller should ensure both socket addresses are AF_INET. | |
313 | */ | |
9f4c899c TM |
314 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
315 | const struct sockaddr *sa2) | |
d7371c41 | 316 | { |
9f4c899c TM |
317 | const struct sockaddr_in *saddr1 = (const struct sockaddr_in *)sa1; |
318 | const struct sockaddr_in *saddr2 = (const struct sockaddr_in *)sa2; | |
319 | ||
d7371c41 ID |
320 | if (saddr1->sin_addr.s_addr != saddr2->sin_addr.s_addr) |
321 | return 0; | |
322 | return saddr1->sin_port == saddr2->sin_port; | |
323 | } | |
324 | ||
d7371c41 ID |
325 | /* |
326 | * Test if two socket addresses represent the same actual socket, | |
327 | * by comparing (only) relevant fields. | |
328 | */ | |
329 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
330 | const struct sockaddr *sa2) | |
331 | { | |
332 | if (sa1->sa_family != sa2->sa_family) | |
333 | return 0; | |
334 | ||
335 | switch (sa1->sa_family) { | |
336 | case AF_INET: | |
9f4c899c | 337 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 338 | case AF_INET6: |
9f4c899c | 339 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
340 | } |
341 | return 0; | |
342 | } | |
343 | ||
24c8dbbb | 344 | /* |
c81468a1 TM |
345 | * Find a client by IP address and protocol version |
346 | * - returns NULL if no such client | |
24c8dbbb | 347 | */ |
ff052645 | 348 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
349 | { |
350 | struct nfs_client *clp; | |
351 | ||
c81468a1 | 352 | spin_lock(&nfs_client_lock); |
24c8dbbb | 353 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
354 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
355 | ||
13bbc06a | 356 | /* Don't match clients that failed to initialise properly */ |
c81468a1 | 357 | if (clp->cl_cons_state != NFS_CS_READY) |
13bbc06a TM |
358 | continue; |
359 | ||
24c8dbbb | 360 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 361 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
362 | continue; |
363 | ||
c81468a1 | 364 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 365 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
366 | continue; |
367 | ||
c81468a1 TM |
368 | atomic_inc(&clp->cl_count); |
369 | spin_unlock(&nfs_client_lock); | |
370 | return clp; | |
24c8dbbb | 371 | } |
c81468a1 | 372 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 373 | return NULL; |
24c8dbbb DH |
374 | } |
375 | ||
3fbd67ad TM |
376 | /* |
377 | * Find a client by IP address and protocol version | |
378 | * - returns NULL if no such client | |
379 | */ | |
380 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
381 | { | |
382 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
383 | u32 nfsvers = clp->rpc_ops->version; | |
384 | ||
385 | spin_lock(&nfs_client_lock); | |
386 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
387 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
388 | ||
389 | /* Don't match clients that failed to initialise properly */ | |
390 | if (clp->cl_cons_state != NFS_CS_READY) | |
391 | continue; | |
392 | ||
393 | /* Different NFS versions cannot share the same nfs_client */ | |
394 | if (clp->rpc_ops->version != nfsvers) | |
395 | continue; | |
396 | ||
3fbd67ad TM |
397 | /* Match only the IP address, not the port number */ |
398 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
399 | continue; | |
400 | ||
401 | atomic_inc(&clp->cl_count); | |
402 | spin_unlock(&nfs_client_lock); | |
403 | return clp; | |
404 | } | |
405 | spin_unlock(&nfs_client_lock); | |
406 | return NULL; | |
407 | } | |
408 | ||
24c8dbbb | 409 | /* |
c81468a1 TM |
410 | * Find an nfs_client on the list that matches the initialisation data |
411 | * that is supplied. | |
24c8dbbb | 412 | */ |
c81468a1 | 413 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
414 | { |
415 | struct nfs_client *clp; | |
d7371c41 | 416 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 417 | |
c81468a1 | 418 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 419 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
420 | /* Don't match clients that failed to initialise properly */ |
421 | if (clp->cl_cons_state < 0) | |
422 | continue; | |
423 | ||
424 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 425 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
426 | continue; |
427 | ||
59dca3b2 TM |
428 | if (clp->cl_proto != data->proto) |
429 | continue; | |
430 | ||
c81468a1 | 431 | /* Match the full socket address */ |
d7371c41 | 432 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
433 | continue; |
434 | ||
435 | atomic_inc(&clp->cl_count); | |
436 | return clp; | |
13bbc06a | 437 | } |
c81468a1 | 438 | return NULL; |
24c8dbbb DH |
439 | } |
440 | ||
441 | /* | |
442 | * Look up a client by IP address and protocol version | |
443 | * - creates a new record if one doesn't yet exist | |
444 | */ | |
3a498026 | 445 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
446 | { |
447 | struct nfs_client *clp, *new = NULL; | |
448 | int error; | |
449 | ||
d7422c47 CL |
450 | dprintk("--> nfs_get_client(%s,v%u)\n", |
451 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
452 | |
453 | /* see if the client already exists */ | |
454 | do { | |
455 | spin_lock(&nfs_client_lock); | |
456 | ||
c81468a1 | 457 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
458 | if (clp) |
459 | goto found_client; | |
460 | if (new) | |
461 | goto install_client; | |
462 | ||
463 | spin_unlock(&nfs_client_lock); | |
464 | ||
3a498026 | 465 | new = nfs_alloc_client(cl_init); |
24c8dbbb DH |
466 | } while (new); |
467 | ||
468 | return ERR_PTR(-ENOMEM); | |
469 | ||
470 | /* install a new client and return with it unready */ | |
471 | install_client: | |
472 | clp = new; | |
473 | list_add(&clp->cl_share_link, &nfs_client_list); | |
474 | spin_unlock(&nfs_client_lock); | |
475 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
476 | return clp; | |
477 | ||
478 | /* found an existing client | |
479 | * - make sure it's ready before returning | |
480 | */ | |
481 | found_client: | |
482 | spin_unlock(&nfs_client_lock); | |
483 | ||
484 | if (new) | |
485 | nfs_free_client(new); | |
486 | ||
150030b7 | 487 | error = wait_event_killable(nfs_client_active_wq, |
0bae89ec TM |
488 | clp->cl_cons_state != NFS_CS_INITING); |
489 | if (error < 0) { | |
490 | nfs_put_client(clp); | |
491 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
492 | } |
493 | ||
494 | if (clp->cl_cons_state < NFS_CS_READY) { | |
495 | error = clp->cl_cons_state; | |
496 | nfs_put_client(clp); | |
497 | return ERR_PTR(error); | |
498 | } | |
499 | ||
54ceac45 DH |
500 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
501 | ||
24c8dbbb DH |
502 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
503 | return clp; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Mark a server as ready or failed | |
508 | */ | |
54ceac45 | 509 | static void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
510 | { |
511 | clp->cl_cons_state = state; | |
512 | wake_up_all(&nfs_client_active_wq); | |
513 | } | |
5006a76c DH |
514 | |
515 | /* | |
516 | * Initialise the timeout values for a connection | |
517 | */ | |
518 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
519 | unsigned int timeo, unsigned int retrans) | |
520 | { | |
521 | to->to_initval = timeo * HZ / 10; | |
522 | to->to_retries = retrans; | |
5006a76c DH |
523 | |
524 | switch (proto) { | |
0896a725 | 525 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 526 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
527 | if (to->to_retries == 0) |
528 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 529 | if (to->to_initval == 0) |
259875ef | 530 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
531 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
532 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
533 | to->to_increment = to->to_initval; | |
534 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
535 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
536 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
537 | if (to->to_maxval < to->to_initval) | |
538 | to->to_maxval = to->to_initval; | |
5006a76c DH |
539 | to->to_exponential = 0; |
540 | break; | |
0896a725 | 541 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
542 | if (to->to_retries == 0) |
543 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 544 | if (!to->to_initval) |
259875ef | 545 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
546 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
547 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
548 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
549 | to->to_exponential = 1; | |
550 | break; | |
259875ef TM |
551 | default: |
552 | BUG(); | |
5006a76c DH |
553 | } |
554 | } | |
555 | ||
556 | /* | |
557 | * Create an RPC client handle | |
558 | */ | |
59dca3b2 | 559 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
560 | const struct rpc_timeout *timeparms, |
561 | rpc_authflavor_t flavor, | |
4a01b8a4 | 562 | int discrtry, int noresvport) |
5006a76c | 563 | { |
5006a76c | 564 | struct rpc_clnt *clnt = NULL; |
41877d20 | 565 | struct rpc_create_args args = { |
59dca3b2 | 566 | .protocol = clp->cl_proto, |
41877d20 | 567 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 568 | .addrsize = clp->cl_addrlen, |
33170233 | 569 | .timeout = timeparms, |
41877d20 CL |
570 | .servername = clp->cl_hostname, |
571 | .program = &nfs_program, | |
572 | .version = clp->rpc_ops->version, | |
573 | .authflavor = flavor, | |
574 | }; | |
5006a76c | 575 | |
4a01b8a4 CL |
576 | if (discrtry) |
577 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
578 | if (noresvport) | |
579 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
580 | ||
5006a76c DH |
581 | if (!IS_ERR(clp->cl_rpcclient)) |
582 | return 0; | |
583 | ||
41877d20 | 584 | clnt = rpc_create(&args); |
5006a76c DH |
585 | if (IS_ERR(clnt)) { |
586 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 587 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
588 | return PTR_ERR(clnt); |
589 | } | |
590 | ||
5006a76c DH |
591 | clp->cl_rpcclient = clnt; |
592 | return 0; | |
593 | } | |
54ceac45 DH |
594 | |
595 | /* | |
596 | * Version 2 or 3 client destruction | |
597 | */ | |
598 | static void nfs_destroy_server(struct nfs_server *server) | |
599 | { | |
54ceac45 | 600 | if (!(server->flags & NFS_MOUNT_NONLM)) |
9289e7f9 | 601 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
602 | } |
603 | ||
604 | /* | |
605 | * Version 2 or 3 lockd setup | |
606 | */ | |
607 | static int nfs_start_lockd(struct nfs_server *server) | |
608 | { | |
9289e7f9 CL |
609 | struct nlm_host *host; |
610 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
611 | struct nlmclnt_initdata nlm_init = { |
612 | .hostname = clp->cl_hostname, | |
613 | .address = (struct sockaddr *)&clp->cl_addr, | |
614 | .addrlen = clp->cl_addrlen, | |
615 | .protocol = server->flags & NFS_MOUNT_TCP ? | |
616 | IPPROTO_TCP : IPPROTO_UDP, | |
617 | .nfs_version = clp->rpc_ops->version, | |
0cb2659b CL |
618 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
619 | 1 : 0, | |
883bb163 | 620 | }; |
54ceac45 | 621 | |
883bb163 | 622 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 623 | return 0; |
54ceac45 | 624 | if (server->flags & NFS_MOUNT_NONLM) |
9289e7f9 CL |
625 | return 0; |
626 | ||
883bb163 | 627 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
628 | if (IS_ERR(host)) |
629 | return PTR_ERR(host); | |
630 | ||
631 | server->nlm_host = host; | |
632 | server->destroy = nfs_destroy_server; | |
633 | return 0; | |
54ceac45 DH |
634 | } |
635 | ||
636 | /* | |
637 | * Initialise an NFSv3 ACL client connection | |
638 | */ | |
639 | #ifdef CONFIG_NFS_V3_ACL | |
640 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
641 | { | |
40c55319 | 642 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
643 | goto out_noacl; |
644 | if (server->flags & NFS_MOUNT_NOACL) | |
645 | goto out_noacl; | |
646 | ||
647 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
648 | if (IS_ERR(server->client_acl)) | |
649 | goto out_noacl; | |
650 | ||
651 | /* No errors! Assume that Sun nfsacls are supported */ | |
652 | server->caps |= NFS_CAP_ACLS; | |
653 | return; | |
654 | ||
655 | out_noacl: | |
656 | server->caps &= ~NFS_CAP_ACLS; | |
657 | } | |
658 | #else | |
659 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
660 | { | |
661 | server->flags &= ~NFS_MOUNT_NOACL; | |
662 | server->caps &= ~NFS_CAP_ACLS; | |
663 | } | |
664 | #endif | |
665 | ||
666 | /* | |
667 | * Create a general RPC client | |
668 | */ | |
33170233 TM |
669 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
670 | const struct rpc_timeout *timeo, | |
671 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
672 | { |
673 | struct nfs_client *clp = server->nfs_client; | |
674 | ||
675 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
676 | if (IS_ERR(server->client)) { | |
3110ff80 | 677 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
678 | return PTR_ERR(server->client); |
679 | } | |
680 | ||
33170233 TM |
681 | memcpy(&server->client->cl_timeout_default, |
682 | timeo, | |
683 | sizeof(server->client->cl_timeout_default)); | |
684 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
685 | ||
54ceac45 DH |
686 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
687 | struct rpc_auth *auth; | |
688 | ||
689 | auth = rpcauth_create(pseudoflavour, server->client); | |
690 | if (IS_ERR(auth)) { | |
3110ff80 | 691 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
692 | return PTR_ERR(auth); |
693 | } | |
694 | } | |
695 | server->client->cl_softrtry = 0; | |
696 | if (server->flags & NFS_MOUNT_SOFT) | |
697 | server->client->cl_softrtry = 1; | |
698 | ||
54ceac45 DH |
699 | return 0; |
700 | } | |
701 | ||
702 | /* | |
703 | * Initialise an NFS2 or NFS3 client | |
704 | */ | |
2283f8d6 | 705 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 706 | const struct rpc_timeout *timeparms, |
2283f8d6 | 707 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 708 | { |
54ceac45 DH |
709 | int error; |
710 | ||
711 | if (clp->cl_cons_state == NFS_CS_READY) { | |
712 | /* the client is already initialised */ | |
713 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
714 | return 0; | |
715 | } | |
716 | ||
54ceac45 DH |
717 | /* |
718 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
719 | * - RFC 2623, sec 2.3.2 | |
720 | */ | |
d740351b CL |
721 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
722 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
723 | if (error < 0) |
724 | goto error; | |
725 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
726 | return 0; | |
727 | ||
728 | error: | |
729 | nfs_mark_client_ready(clp, error); | |
730 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
731 | return error; | |
732 | } | |
733 | ||
734 | /* | |
735 | * Create a version 2 or 3 client | |
736 | */ | |
2283f8d6 TT |
737 | static int nfs_init_server(struct nfs_server *server, |
738 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 739 | { |
3a498026 TM |
740 | struct nfs_client_initdata cl_init = { |
741 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 742 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 743 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 744 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 745 | .proto = data->nfs_server.protocol, |
3a498026 | 746 | }; |
33170233 | 747 | struct rpc_timeout timeparms; |
54ceac45 | 748 | struct nfs_client *clp; |
3a498026 | 749 | int error; |
54ceac45 DH |
750 | |
751 | dprintk("--> nfs_init_server()\n"); | |
752 | ||
753 | #ifdef CONFIG_NFS_V3 | |
754 | if (data->flags & NFS_MOUNT_VER3) | |
40c55319 | 755 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
756 | #endif |
757 | ||
758 | /* Allocate or find a client reference we can use */ | |
3a498026 | 759 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
760 | if (IS_ERR(clp)) { |
761 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
762 | return PTR_ERR(clp); | |
763 | } | |
764 | ||
33170233 TM |
765 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
766 | data->timeo, data->retrans); | |
767 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
768 | if (error < 0) |
769 | goto error; | |
770 | ||
771 | server->nfs_client = clp; | |
772 | ||
773 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 774 | server->flags = data->flags; |
54ceac45 DH |
775 | |
776 | if (data->rsize) | |
777 | server->rsize = nfs_block_size(data->rsize, NULL); | |
778 | if (data->wsize) | |
779 | server->wsize = nfs_block_size(data->wsize, NULL); | |
780 | ||
781 | server->acregmin = data->acregmin * HZ; | |
782 | server->acregmax = data->acregmax * HZ; | |
783 | server->acdirmin = data->acdirmin * HZ; | |
784 | server->acdirmax = data->acdirmax * HZ; | |
785 | ||
786 | /* Start lockd here, before we might error out */ | |
787 | error = nfs_start_lockd(server); | |
788 | if (error < 0) | |
789 | goto error; | |
790 | ||
f22d6d79 CL |
791 | server->port = data->nfs_server.port; |
792 | ||
33170233 | 793 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
794 | if (error < 0) |
795 | goto error; | |
796 | ||
3f8400d1 CL |
797 | /* Preserve the values of mount_server-related mount options */ |
798 | if (data->mount_server.addrlen) { | |
799 | memcpy(&server->mountd_address, &data->mount_server.address, | |
800 | data->mount_server.addrlen); | |
801 | server->mountd_addrlen = data->mount_server.addrlen; | |
802 | } | |
803 | server->mountd_version = data->mount_server.version; | |
804 | server->mountd_port = data->mount_server.port; | |
805 | server->mountd_protocol = data->mount_server.protocol; | |
806 | ||
54ceac45 DH |
807 | server->namelen = data->namlen; |
808 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
809 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
810 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
811 | return 0; | |
812 | ||
813 | error: | |
814 | server->nfs_client = NULL; | |
815 | nfs_put_client(clp); | |
816 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
817 | return error; | |
818 | } | |
819 | ||
820 | /* | |
821 | * Load up the server record from information gained in an fsinfo record | |
822 | */ | |
823 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
824 | { | |
825 | unsigned long max_rpc_payload; | |
826 | ||
827 | /* Work out a lot of parameters */ | |
828 | if (server->rsize == 0) | |
829 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
830 | if (server->wsize == 0) | |
831 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
832 | ||
833 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
834 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
835 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
836 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
837 | ||
838 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
839 | if (server->rsize > max_rpc_payload) | |
840 | server->rsize = max_rpc_payload; | |
841 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
842 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
843 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 844 | |
54ceac45 DH |
845 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
846 | ||
847 | if (server->wsize > max_rpc_payload) | |
848 | server->wsize = max_rpc_payload; | |
849 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
850 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
851 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
852 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
853 | ||
854 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
855 | if (server->dtsize > PAGE_CACHE_SIZE) | |
856 | server->dtsize = PAGE_CACHE_SIZE; | |
857 | if (server->dtsize > server->rsize) | |
858 | server->dtsize = server->rsize; | |
859 | ||
860 | if (server->flags & NFS_MOUNT_NOAC) { | |
861 | server->acregmin = server->acregmax = 0; | |
862 | server->acdirmin = server->acdirmax = 0; | |
863 | } | |
864 | ||
865 | server->maxfilesize = fsinfo->maxfilesize; | |
866 | ||
867 | /* We're airborne Set socket buffersize */ | |
868 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
869 | } | |
870 | ||
871 | /* | |
872 | * Probe filesystem information, including the FSID on v2/v3 | |
873 | */ | |
874 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
875 | { | |
876 | struct nfs_fsinfo fsinfo; | |
877 | struct nfs_client *clp = server->nfs_client; | |
878 | int error; | |
879 | ||
880 | dprintk("--> nfs_probe_fsinfo()\n"); | |
881 | ||
882 | if (clp->rpc_ops->set_capabilities != NULL) { | |
883 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
884 | if (error < 0) | |
885 | goto out_error; | |
886 | } | |
887 | ||
888 | fsinfo.fattr = fattr; | |
889 | nfs_fattr_init(fattr); | |
890 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
891 | if (error < 0) | |
892 | goto out_error; | |
893 | ||
894 | nfs_server_set_fsinfo(server, &fsinfo); | |
e0bf68dd PZ |
895 | error = bdi_init(&server->backing_dev_info); |
896 | if (error) | |
897 | goto out_error; | |
898 | ||
54ceac45 DH |
899 | |
900 | /* Get some general file system info */ | |
901 | if (server->namelen == 0) { | |
902 | struct nfs_pathconf pathinfo; | |
903 | ||
904 | pathinfo.fattr = fattr; | |
905 | nfs_fattr_init(fattr); | |
906 | ||
907 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
908 | server->namelen = pathinfo.max_namelen; | |
909 | } | |
910 | ||
911 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
912 | return 0; | |
913 | ||
914 | out_error: | |
915 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
916 | return error; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Copy useful information when duplicating a server record | |
921 | */ | |
922 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
923 | { | |
924 | target->flags = source->flags; | |
925 | target->acregmin = source->acregmin; | |
926 | target->acregmax = source->acregmax; | |
927 | target->acdirmin = source->acdirmin; | |
928 | target->acdirmax = source->acdirmax; | |
929 | target->caps = source->caps; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Allocate and initialise a server record | |
934 | */ | |
935 | static struct nfs_server *nfs_alloc_server(void) | |
936 | { | |
937 | struct nfs_server *server; | |
938 | ||
939 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
940 | if (!server) | |
941 | return NULL; | |
942 | ||
943 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
944 | ||
945 | /* Zero out the NFS state stuff */ | |
946 | INIT_LIST_HEAD(&server->client_link); | |
947 | INIT_LIST_HEAD(&server->master_link); | |
948 | ||
ef818a28 SD |
949 | atomic_set(&server->active, 0); |
950 | ||
54ceac45 DH |
951 | server->io_stats = nfs_alloc_iostats(); |
952 | if (!server->io_stats) { | |
953 | kfree(server); | |
954 | return NULL; | |
955 | } | |
956 | ||
957 | return server; | |
958 | } | |
959 | ||
960 | /* | |
961 | * Free up a server record | |
962 | */ | |
963 | void nfs_free_server(struct nfs_server *server) | |
964 | { | |
965 | dprintk("--> nfs_free_server()\n"); | |
966 | ||
967 | spin_lock(&nfs_client_lock); | |
968 | list_del(&server->client_link); | |
969 | list_del(&server->master_link); | |
970 | spin_unlock(&nfs_client_lock); | |
971 | ||
972 | if (server->destroy != NULL) | |
973 | server->destroy(server); | |
5cef338b TM |
974 | |
975 | if (!IS_ERR(server->client_acl)) | |
976 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
977 | if (!IS_ERR(server->client)) |
978 | rpc_shutdown_client(server->client); | |
979 | ||
980 | nfs_put_client(server->nfs_client); | |
981 | ||
982 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 983 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
984 | kfree(server); |
985 | nfs_release_automount_timer(); | |
986 | dprintk("<-- nfs_free_server()\n"); | |
987 | } | |
988 | ||
989 | /* | |
990 | * Create a version 2 or 3 volume record | |
991 | * - keyed on server and FSID | |
992 | */ | |
2283f8d6 | 993 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
994 | struct nfs_fh *mntfh) |
995 | { | |
996 | struct nfs_server *server; | |
997 | struct nfs_fattr fattr; | |
998 | int error; | |
999 | ||
1000 | server = nfs_alloc_server(); | |
1001 | if (!server) | |
1002 | return ERR_PTR(-ENOMEM); | |
1003 | ||
1004 | /* Get a client representation */ | |
1005 | error = nfs_init_server(server, data); | |
1006 | if (error < 0) | |
1007 | goto error; | |
1008 | ||
1009 | BUG_ON(!server->nfs_client); | |
1010 | BUG_ON(!server->nfs_client->rpc_ops); | |
1011 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1012 | ||
1013 | /* Probe the root fh to retrieve its FSID */ | |
1014 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1015 | if (error < 0) | |
1016 | goto error; | |
54af3bb5 TM |
1017 | if (server->nfs_client->rpc_ops->version == 3) { |
1018 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1019 | server->namelen = NFS3_MAXNAMLEN; | |
1020 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1021 | server->caps |= NFS_CAP_READDIRPLUS; | |
1022 | } else { | |
1023 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1024 | server->namelen = NFS2_MAXNAMLEN; | |
1025 | } | |
1026 | ||
54ceac45 DH |
1027 | if (!(fattr.valid & NFS_ATTR_FATTR)) { |
1028 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr); | |
1029 | if (error < 0) { | |
1030 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1031 | goto error; | |
1032 | } | |
1033 | } | |
1034 | memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid)); | |
1035 | ||
6daabf1b DH |
1036 | dprintk("Server FSID: %llx:%llx\n", |
1037 | (unsigned long long) server->fsid.major, | |
1038 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1039 | |
1040 | BUG_ON(!server->nfs_client); | |
1041 | BUG_ON(!server->nfs_client->rpc_ops); | |
1042 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1043 | ||
1044 | spin_lock(&nfs_client_lock); | |
1045 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1046 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1047 | spin_unlock(&nfs_client_lock); | |
1048 | ||
1049 | server->mount_time = jiffies; | |
1050 | return server; | |
1051 | ||
1052 | error: | |
1053 | nfs_free_server(server); | |
1054 | return ERR_PTR(error); | |
1055 | } | |
1056 | ||
1057 | #ifdef CONFIG_NFS_V4 | |
1058 | /* | |
1059 | * Initialise an NFS4 client record | |
1060 | */ | |
1061 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 1062 | const struct rpc_timeout *timeparms, |
7d9ac06f | 1063 | const char *ip_addr, |
d740351b CL |
1064 | rpc_authflavor_t authflavour, |
1065 | int flags) | |
54ceac45 DH |
1066 | { |
1067 | int error; | |
1068 | ||
1069 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1070 | /* the client is initialised already */ | |
1071 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1076 | clp->rpc_ops = &nfs_v4_clientops; | |
1077 | ||
59dca3b2 | 1078 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1079 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1080 | if (error < 0) |
1081 | goto error; | |
7d9ac06f | 1082 | memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1083 | |
1084 | error = nfs_idmap_new(clp); | |
1085 | if (error < 0) { | |
1086 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1087 | __func__, error); |
54ceac45 DH |
1088 | goto error; |
1089 | } | |
9c5bf38d | 1090 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 DH |
1091 | |
1092 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
1093 | return 0; | |
1094 | ||
1095 | error: | |
1096 | nfs_mark_client_ready(clp, error); | |
1097 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1098 | return error; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Set up an NFS4 client | |
1103 | */ | |
1104 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1105 | const char *hostname, |
1106 | const struct sockaddr *addr, | |
1107 | const size_t addrlen, | |
7d9ac06f | 1108 | const char *ip_addr, |
54ceac45 | 1109 | rpc_authflavor_t authflavour, |
33170233 | 1110 | int proto, const struct rpc_timeout *timeparms) |
54ceac45 | 1111 | { |
3a498026 TM |
1112 | struct nfs_client_initdata cl_init = { |
1113 | .hostname = hostname, | |
dcecae0f CL |
1114 | .addr = addr, |
1115 | .addrlen = addrlen, | |
40c55319 | 1116 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1117 | .proto = proto, |
3a498026 | 1118 | }; |
54ceac45 DH |
1119 | struct nfs_client *clp; |
1120 | int error; | |
1121 | ||
1122 | dprintk("--> nfs4_set_client()\n"); | |
1123 | ||
1124 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1125 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1126 | if (IS_ERR(clp)) { |
1127 | error = PTR_ERR(clp); | |
1128 | goto error; | |
1129 | } | |
d740351b CL |
1130 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1131 | server->flags); | |
54ceac45 DH |
1132 | if (error < 0) |
1133 | goto error_put; | |
1134 | ||
1135 | server->nfs_client = clp; | |
1136 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1137 | return 0; | |
1138 | ||
1139 | error_put: | |
1140 | nfs_put_client(clp); | |
1141 | error: | |
1142 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1143 | return error; | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Create a version 4 volume record | |
1148 | */ | |
1149 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1150 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1151 | { |
33170233 | 1152 | struct rpc_timeout timeparms; |
54ceac45 DH |
1153 | int error; |
1154 | ||
1155 | dprintk("--> nfs4_init_server()\n"); | |
1156 | ||
33170233 TM |
1157 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1158 | data->timeo, data->retrans); | |
1159 | ||
542fcc33 CL |
1160 | /* Initialise the client representation from the mount data */ |
1161 | server->flags = data->flags; | |
1162 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1163 | ||
33170233 TM |
1164 | /* Get a client record */ |
1165 | error = nfs4_set_client(server, | |
1166 | data->nfs_server.hostname, | |
1167 | (const struct sockaddr *)&data->nfs_server.address, | |
1168 | data->nfs_server.addrlen, | |
1169 | data->client_address, | |
1170 | data->auth_flavors[0], | |
1171 | data->nfs_server.protocol, | |
1172 | &timeparms); | |
1173 | if (error < 0) | |
1174 | goto error; | |
1175 | ||
54ceac45 DH |
1176 | if (data->rsize) |
1177 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1178 | if (data->wsize) | |
1179 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1180 | ||
1181 | server->acregmin = data->acregmin * HZ; | |
1182 | server->acregmax = data->acregmax * HZ; | |
1183 | server->acdirmin = data->acdirmin * HZ; | |
1184 | server->acdirmax = data->acdirmax * HZ; | |
1185 | ||
f22d6d79 CL |
1186 | server->port = data->nfs_server.port; |
1187 | ||
33170233 | 1188 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1189 | |
33170233 | 1190 | error: |
54ceac45 DH |
1191 | /* Done */ |
1192 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1193 | return error; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * Create a version 4 volume record | |
1198 | * - keyed on server and FSID | |
1199 | */ | |
91ea40b9 | 1200 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1201 | struct nfs_fh *mntfh) |
1202 | { | |
1203 | struct nfs_fattr fattr; | |
1204 | struct nfs_server *server; | |
1205 | int error; | |
1206 | ||
1207 | dprintk("--> nfs4_create_server()\n"); | |
1208 | ||
1209 | server = nfs_alloc_server(); | |
1210 | if (!server) | |
1211 | return ERR_PTR(-ENOMEM); | |
1212 | ||
54ceac45 | 1213 | /* set up the general RPC client */ |
91ea40b9 | 1214 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1215 | if (error < 0) |
1216 | goto error; | |
1217 | ||
1218 | BUG_ON(!server->nfs_client); | |
1219 | BUG_ON(!server->nfs_client->rpc_ops); | |
1220 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1221 | ||
1222 | /* Probe the root fh to retrieve its FSID */ | |
91ea40b9 | 1223 | error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path); |
54ceac45 DH |
1224 | if (error < 0) |
1225 | goto error; | |
1226 | ||
6daabf1b DH |
1227 | dprintk("Server FSID: %llx:%llx\n", |
1228 | (unsigned long long) server->fsid.major, | |
1229 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1230 | dprintk("Mount FH: %d\n", mntfh->size); |
1231 | ||
1232 | error = nfs_probe_fsinfo(server, mntfh, &fattr); | |
1233 | if (error < 0) | |
1234 | goto error; | |
1235 | ||
54af3bb5 TM |
1236 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1237 | server->namelen = NFS4_MAXNAMLEN; | |
1238 | ||
54ceac45 DH |
1239 | BUG_ON(!server->nfs_client); |
1240 | BUG_ON(!server->nfs_client->rpc_ops); | |
1241 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1242 | ||
1243 | spin_lock(&nfs_client_lock); | |
1244 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1245 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1246 | spin_unlock(&nfs_client_lock); | |
1247 | ||
1248 | server->mount_time = jiffies; | |
1249 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1250 | return server; | |
1251 | ||
1252 | error: | |
1253 | nfs_free_server(server); | |
1254 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1255 | return ERR_PTR(error); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * Create an NFS4 referral server record | |
1260 | */ | |
1261 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1262 | struct nfs_fh *mntfh) |
54ceac45 DH |
1263 | { |
1264 | struct nfs_client *parent_client; | |
1265 | struct nfs_server *server, *parent_server; | |
1266 | struct nfs_fattr fattr; | |
1267 | int error; | |
1268 | ||
1269 | dprintk("--> nfs4_create_referral_server()\n"); | |
1270 | ||
1271 | server = nfs_alloc_server(); | |
1272 | if (!server) | |
1273 | return ERR_PTR(-ENOMEM); | |
1274 | ||
1275 | parent_server = NFS_SB(data->sb); | |
1276 | parent_client = parent_server->nfs_client; | |
1277 | ||
542fcc33 CL |
1278 | /* Initialise the client representation from the parent server */ |
1279 | nfs_server_copy_userdata(server, parent_server); | |
1280 | server->caps |= NFS_CAP_ATOMIC_OPEN; | |
1281 | ||
54ceac45 DH |
1282 | /* Get a client representation. |
1283 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1284 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1285 | data->addr, |
1286 | data->addrlen, | |
dcecae0f CL |
1287 | parent_client->cl_ipaddr, |
1288 | data->authflavor, | |
1289 | parent_server->client->cl_xprt->prot, | |
33170233 | 1290 | parent_server->client->cl_timeout); |
297de4f6 | 1291 | if (error < 0) |
1292 | goto error; | |
54ceac45 | 1293 | |
33170233 | 1294 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1295 | if (error < 0) |
1296 | goto error; | |
1297 | ||
1298 | BUG_ON(!server->nfs_client); | |
1299 | BUG_ON(!server->nfs_client->rpc_ops); | |
1300 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1301 | ||
f2d0d85e TM |
1302 | /* Probe the root fh to retrieve its FSID and filehandle */ |
1303 | error = nfs4_path_walk(server, mntfh, data->mnt_path); | |
1304 | if (error < 0) | |
1305 | goto error; | |
1306 | ||
54ceac45 | 1307 | /* probe the filesystem info for this server filesystem */ |
f2d0d85e | 1308 | error = nfs_probe_fsinfo(server, mntfh, &fattr); |
54ceac45 DH |
1309 | if (error < 0) |
1310 | goto error; | |
1311 | ||
54af3bb5 TM |
1312 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1313 | server->namelen = NFS4_MAXNAMLEN; | |
1314 | ||
54ceac45 | 1315 | dprintk("Referral FSID: %llx:%llx\n", |
6daabf1b DH |
1316 | (unsigned long long) server->fsid.major, |
1317 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1318 | |
1319 | spin_lock(&nfs_client_lock); | |
1320 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1321 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1322 | spin_unlock(&nfs_client_lock); | |
1323 | ||
1324 | server->mount_time = jiffies; | |
1325 | ||
1326 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1327 | return server; | |
1328 | ||
1329 | error: | |
1330 | nfs_free_server(server); | |
1331 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1332 | return ERR_PTR(error); | |
1333 | } | |
1334 | ||
1335 | #endif /* CONFIG_NFS_V4 */ | |
1336 | ||
1337 | /* | |
1338 | * Clone an NFS2, NFS3 or NFS4 server record | |
1339 | */ | |
1340 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1341 | struct nfs_fh *fh, | |
1342 | struct nfs_fattr *fattr) | |
1343 | { | |
1344 | struct nfs_server *server; | |
1345 | struct nfs_fattr fattr_fsinfo; | |
1346 | int error; | |
1347 | ||
1348 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1349 | (unsigned long long) fattr->fsid.major, |
1350 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1351 | |
1352 | server = nfs_alloc_server(); | |
1353 | if (!server) | |
1354 | return ERR_PTR(-ENOMEM); | |
1355 | ||
1356 | /* Copy data from the source */ | |
1357 | server->nfs_client = source->nfs_client; | |
1358 | atomic_inc(&server->nfs_client->cl_count); | |
1359 | nfs_server_copy_userdata(server, source); | |
1360 | ||
1361 | server->fsid = fattr->fsid; | |
1362 | ||
33170233 TM |
1363 | error = nfs_init_server_rpcclient(server, |
1364 | source->client->cl_timeout, | |
1365 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1366 | if (error < 0) |
1367 | goto out_free_server; | |
1368 | if (!IS_ERR(source->client_acl)) | |
1369 | nfs_init_server_aclclient(server); | |
1370 | ||
1371 | /* probe the filesystem info for this server filesystem */ | |
1372 | error = nfs_probe_fsinfo(server, fh, &fattr_fsinfo); | |
1373 | if (error < 0) | |
1374 | goto out_free_server; | |
1375 | ||
54af3bb5 TM |
1376 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1377 | server->namelen = NFS4_MAXNAMLEN; | |
1378 | ||
54ceac45 | 1379 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1380 | (unsigned long long) server->fsid.major, |
1381 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1382 | |
1383 | error = nfs_start_lockd(server); | |
1384 | if (error < 0) | |
1385 | goto out_free_server; | |
1386 | ||
1387 | spin_lock(&nfs_client_lock); | |
1388 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1389 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1390 | spin_unlock(&nfs_client_lock); | |
1391 | ||
1392 | server->mount_time = jiffies; | |
1393 | ||
1394 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1395 | return server; | |
1396 | ||
1397 | out_free_server: | |
1398 | nfs_free_server(server); | |
1399 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1400 | return ERR_PTR(error); | |
1401 | } | |
6aaca566 DH |
1402 | |
1403 | #ifdef CONFIG_PROC_FS | |
1404 | static struct proc_dir_entry *proc_fs_nfs; | |
1405 | ||
1406 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1407 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1408 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1409 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1410 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1411 | ||
1412 | static struct seq_operations nfs_server_list_ops = { | |
1413 | .start = nfs_server_list_start, | |
1414 | .next = nfs_server_list_next, | |
1415 | .stop = nfs_server_list_stop, | |
1416 | .show = nfs_server_list_show, | |
1417 | }; | |
1418 | ||
00977a59 | 1419 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1420 | .open = nfs_server_list_open, |
1421 | .read = seq_read, | |
1422 | .llseek = seq_lseek, | |
1423 | .release = seq_release, | |
34b37235 | 1424 | .owner = THIS_MODULE, |
6aaca566 DH |
1425 | }; |
1426 | ||
1427 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1428 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1429 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1430 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1431 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1432 | ||
1433 | static struct seq_operations nfs_volume_list_ops = { | |
1434 | .start = nfs_volume_list_start, | |
1435 | .next = nfs_volume_list_next, | |
1436 | .stop = nfs_volume_list_stop, | |
1437 | .show = nfs_volume_list_show, | |
1438 | }; | |
1439 | ||
00977a59 | 1440 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1441 | .open = nfs_volume_list_open, |
1442 | .read = seq_read, | |
1443 | .llseek = seq_lseek, | |
1444 | .release = seq_release, | |
34b37235 | 1445 | .owner = THIS_MODULE, |
6aaca566 DH |
1446 | }; |
1447 | ||
1448 | /* | |
1449 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1450 | * we're dealing | |
1451 | */ | |
1452 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1453 | { | |
1454 | struct seq_file *m; | |
1455 | int ret; | |
1456 | ||
1457 | ret = seq_open(file, &nfs_server_list_ops); | |
1458 | if (ret < 0) | |
1459 | return ret; | |
1460 | ||
1461 | m = file->private_data; | |
1462 | m->private = PDE(inode)->data; | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * set up the iterator to start reading from the server list and return the first item | |
1469 | */ | |
1470 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1471 | { | |
6aaca566 DH |
1472 | /* lock the list against modification */ |
1473 | spin_lock(&nfs_client_lock); | |
259902ea | 1474 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1475 | } |
1476 | ||
1477 | /* | |
1478 | * move to next server | |
1479 | */ | |
1480 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1481 | { | |
259902ea | 1482 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1483 | } |
1484 | ||
1485 | /* | |
1486 | * clean up after reading from the transports list | |
1487 | */ | |
1488 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1489 | { | |
1490 | spin_unlock(&nfs_client_lock); | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * display a header line followed by a load of call lines | |
1495 | */ | |
1496 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1497 | { | |
1498 | struct nfs_client *clp; | |
1499 | ||
1500 | /* display header on line 1 */ | |
259902ea | 1501 | if (v == &nfs_client_list) { |
6aaca566 DH |
1502 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | /* display one transport per line on subsequent lines */ | |
1507 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1508 | ||
5d8515ca | 1509 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1510 | clp->rpc_ops->version, |
5d8515ca CL |
1511 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1512 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1513 | atomic_read(&clp->cl_count), |
1514 | clp->cl_hostname); | |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1521 | */ | |
1522 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1523 | { | |
1524 | struct seq_file *m; | |
1525 | int ret; | |
1526 | ||
1527 | ret = seq_open(file, &nfs_volume_list_ops); | |
1528 | if (ret < 0) | |
1529 | return ret; | |
1530 | ||
1531 | m = file->private_data; | |
1532 | m->private = PDE(inode)->data; | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * set up the iterator to start reading from the volume list and return the first item | |
1539 | */ | |
1540 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1541 | { | |
6aaca566 DH |
1542 | /* lock the list against modification */ |
1543 | spin_lock(&nfs_client_lock); | |
259902ea | 1544 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1545 | } |
1546 | ||
1547 | /* | |
1548 | * move to next volume | |
1549 | */ | |
1550 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1551 | { | |
259902ea | 1552 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1553 | } |
1554 | ||
1555 | /* | |
1556 | * clean up after reading from the transports list | |
1557 | */ | |
1558 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1559 | { | |
1560 | spin_unlock(&nfs_client_lock); | |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * display a header line followed by a load of call lines | |
1565 | */ | |
1566 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1567 | { | |
1568 | struct nfs_server *server; | |
1569 | struct nfs_client *clp; | |
1570 | char dev[8], fsid[17]; | |
1571 | ||
1572 | /* display header on line 1 */ | |
259902ea | 1573 | if (v == &nfs_volume_list) { |
6aaca566 DH |
1574 | seq_puts(m, "NV SERVER PORT DEV FSID\n"); |
1575 | return 0; | |
1576 | } | |
1577 | /* display one transport per line on subsequent lines */ | |
1578 | server = list_entry(v, struct nfs_server, master_link); | |
1579 | clp = server->nfs_client; | |
1580 | ||
1581 | snprintf(dev, 8, "%u:%u", | |
1582 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1583 | ||
1584 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1585 | (unsigned long long) server->fsid.major, |
1586 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1587 | |
5d8515ca | 1588 | seq_printf(m, "v%u %s %s %-7s %-17s\n", |
40c55319 | 1589 | clp->rpc_ops->version, |
5d8515ca CL |
1590 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1591 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1592 | dev, |
1593 | fsid); | |
1594 | ||
1595 | return 0; | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * initialise the /proc/fs/nfsfs/ directory | |
1600 | */ | |
1601 | int __init nfs_fs_proc_init(void) | |
1602 | { | |
1603 | struct proc_dir_entry *p; | |
1604 | ||
36a5aeb8 | 1605 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1606 | if (!proc_fs_nfs) |
1607 | goto error_0; | |
1608 | ||
1609 | proc_fs_nfs->owner = THIS_MODULE; | |
1610 | ||
1611 | /* a file of servers with which we're dealing */ | |
34b37235 DL |
1612 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1613 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1614 | if (!p) |
1615 | goto error_1; | |
1616 | ||
6aaca566 | 1617 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1618 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1619 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1620 | if (!p) |
1621 | goto error_2; | |
6aaca566 DH |
1622 | return 0; |
1623 | ||
1624 | error_2: | |
1625 | remove_proc_entry("servers", proc_fs_nfs); | |
1626 | error_1: | |
36a5aeb8 | 1627 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1628 | error_0: |
1629 | return -ENOMEM; | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * clean up the /proc/fs/nfsfs/ directory | |
1634 | */ | |
1635 | void nfs_fs_proc_exit(void) | |
1636 | { | |
1637 | remove_proc_entry("volumes", proc_fs_nfs); | |
1638 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1639 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1640 | } |
1641 | ||
1642 | #endif /* CONFIG_PROC_FS */ |