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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 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/sched.h> | |
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> | |
26 | #include <linux/sunrpc/xprtsock.h> | |
27 | #include <linux/sunrpc/xprtrdma.h> | |
28 | #include <linux/nfs_fs.h> | |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
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> | |
37 | #include <linux/in6.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/idr.h> | |
40 | #include <net/ipv6.h> | |
41 | #include <linux/nfs_xdr.h> | |
42 | #include <linux/sunrpc/bc_xprt.h> | |
43 | #include <linux/nsproxy.h> | |
44 | #include <linux/pid_namespace.h> | |
45 | ||
46 | ||
47 | #include "nfs4_fs.h" | |
48 | #include "callback.h" | |
49 | #include "delegation.h" | |
50 | #include "iostat.h" | |
51 | #include "internal.h" | |
52 | #include "fscache.h" | |
53 | #include "pnfs.h" | |
54 | #include "netns.h" | |
55 | ||
56 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
57 | ||
58 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); | |
59 | #ifdef CONFIG_NFS_V4 | |
60 | ||
61 | /* | |
62 | * Get a unique NFSv4.0 callback identifier which will be used | |
63 | * by the V4.0 callback service to lookup the nfs_client struct | |
64 | */ | |
65 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
66 | { | |
67 | int ret = 0; | |
68 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
69 | ||
70 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
71 | return ret; | |
72 | retry: | |
73 | if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL)) | |
74 | return -ENOMEM; | |
75 | spin_lock(&nn->nfs_client_lock); | |
76 | ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident); | |
77 | spin_unlock(&nn->nfs_client_lock); | |
78 | if (ret == -EAGAIN) | |
79 | goto retry; | |
80 | return ret; | |
81 | } | |
82 | #endif /* CONFIG_NFS_V4 */ | |
83 | ||
84 | /* | |
85 | * Turn off NFSv4 uid/gid mapping when using AUTH_SYS | |
86 | */ | |
87 | static bool nfs4_disable_idmapping = true; | |
88 | ||
89 | /* | |
90 | * RPC cruft for NFS | |
91 | */ | |
92 | static const struct rpc_version *nfs_version[5] = { | |
93 | #ifdef CONFIG_NFS_V2 | |
94 | [2] = &nfs_version2, | |
95 | #endif | |
96 | #ifdef CONFIG_NFS_V3 | |
97 | [3] = &nfs_version3, | |
98 | #endif | |
99 | #ifdef CONFIG_NFS_V4 | |
100 | [4] = &nfs_version4, | |
101 | #endif | |
102 | }; | |
103 | ||
104 | const struct rpc_program nfs_program = { | |
105 | .name = "nfs", | |
106 | .number = NFS_PROGRAM, | |
107 | .nrvers = ARRAY_SIZE(nfs_version), | |
108 | .version = nfs_version, | |
109 | .stats = &nfs_rpcstat, | |
110 | .pipe_dir_name = NFS_PIPE_DIRNAME, | |
111 | }; | |
112 | ||
113 | struct rpc_stat nfs_rpcstat = { | |
114 | .program = &nfs_program | |
115 | }; | |
116 | ||
117 | ||
118 | #ifdef CONFIG_NFS_V3_ACL | |
119 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
120 | static const struct rpc_version *nfsacl_version[] = { | |
121 | [3] = &nfsacl_version3, | |
122 | }; | |
123 | ||
124 | const struct rpc_program nfsacl_program = { | |
125 | .name = "nfsacl", | |
126 | .number = NFS_ACL_PROGRAM, | |
127 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
128 | .version = nfsacl_version, | |
129 | .stats = &nfsacl_rpcstat, | |
130 | }; | |
131 | #endif /* CONFIG_NFS_V3_ACL */ | |
132 | ||
133 | struct nfs_client_initdata { | |
134 | const char *hostname; | |
135 | const struct sockaddr *addr; | |
136 | size_t addrlen; | |
137 | const struct nfs_rpc_ops *rpc_ops; | |
138 | int proto; | |
139 | u32 minorversion; | |
140 | struct net *net; | |
141 | }; | |
142 | ||
143 | /* | |
144 | * Allocate a shared client record | |
145 | * | |
146 | * Since these are allocated/deallocated very rarely, we don't | |
147 | * bother putting them in a slab cache... | |
148 | */ | |
149 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) | |
150 | { | |
151 | struct nfs_client *clp; | |
152 | struct rpc_cred *cred; | |
153 | int err = -ENOMEM; | |
154 | ||
155 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
156 | goto error_0; | |
157 | ||
158 | clp->rpc_ops = cl_init->rpc_ops; | |
159 | ||
160 | atomic_set(&clp->cl_count, 1); | |
161 | clp->cl_cons_state = NFS_CS_INITING; | |
162 | ||
163 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); | |
164 | clp->cl_addrlen = cl_init->addrlen; | |
165 | ||
166 | if (cl_init->hostname) { | |
167 | err = -ENOMEM; | |
168 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); | |
169 | if (!clp->cl_hostname) | |
170 | goto error_cleanup; | |
171 | } | |
172 | ||
173 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
174 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
175 | ||
176 | clp->cl_proto = cl_init->proto; | |
177 | clp->cl_net = get_net(cl_init->net); | |
178 | ||
179 | #ifdef CONFIG_NFS_V4 | |
180 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
181 | if (err) | |
182 | goto error_cleanup; | |
183 | ||
184 | spin_lock_init(&clp->cl_lock); | |
185 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
186 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
187 | clp->cl_boot_time = CURRENT_TIME; | |
188 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
189 | clp->cl_minorversion = cl_init->minorversion; | |
190 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
191 | #endif | |
192 | cred = rpc_lookup_machine_cred("*"); | |
193 | if (!IS_ERR(cred)) | |
194 | clp->cl_machine_cred = cred; | |
195 | nfs_fscache_get_client_cookie(clp); | |
196 | ||
197 | return clp; | |
198 | ||
199 | error_cleanup: | |
200 | kfree(clp); | |
201 | error_0: | |
202 | return ERR_PTR(err); | |
203 | } | |
204 | ||
205 | #ifdef CONFIG_NFS_V4 | |
206 | #ifdef CONFIG_NFS_V4_1 | |
207 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
208 | { | |
209 | if (nfs4_has_session(clp)) { | |
210 | nfs4_deviceid_purge_client(clp); | |
211 | nfs4_destroy_session(clp->cl_session); | |
212 | } | |
213 | ||
214 | } | |
215 | #else /* CONFIG_NFS_V4_1 */ | |
216 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
217 | { | |
218 | } | |
219 | #endif /* CONFIG_NFS_V4_1 */ | |
220 | ||
221 | /* | |
222 | * Destroy the NFS4 callback service | |
223 | */ | |
224 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
225 | { | |
226 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
227 | nfs_callback_down(clp->cl_mvops->minor_version); | |
228 | } | |
229 | ||
230 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
231 | { | |
232 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
233 | nfs4_kill_renewd(clp); | |
234 | nfs4_shutdown_session(clp); | |
235 | nfs4_destroy_callback(clp); | |
236 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
237 | nfs_idmap_delete(clp); | |
238 | ||
239 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
240 | kfree(clp->cl_serverscope); | |
241 | kfree(clp->cl_implid); | |
242 | } | |
243 | ||
244 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ | |
245 | void nfs_cleanup_cb_ident_idr(struct net *net) | |
246 | { | |
247 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
248 | ||
249 | idr_destroy(&nn->cb_ident_idr); | |
250 | } | |
251 | ||
252 | /* nfs_client_lock held */ | |
253 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
254 | { | |
255 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
256 | ||
257 | if (clp->cl_cb_ident) | |
258 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); | |
259 | } | |
260 | ||
261 | static void pnfs_init_server(struct nfs_server *server) | |
262 | { | |
263 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
264 | } | |
265 | ||
266 | static void nfs4_destroy_server(struct nfs_server *server) | |
267 | { | |
268 | nfs4_purge_state_owners(server); | |
269 | } | |
270 | ||
271 | #else | |
272 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
273 | { | |
274 | } | |
275 | ||
276 | void nfs_cleanup_cb_ident_idr(struct net *net) | |
277 | { | |
278 | } | |
279 | ||
280 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
281 | { | |
282 | } | |
283 | ||
284 | static void pnfs_init_server(struct nfs_server *server) | |
285 | { | |
286 | } | |
287 | ||
288 | #endif /* CONFIG_NFS_V4 */ | |
289 | ||
290 | /* | |
291 | * Destroy a shared client record | |
292 | */ | |
293 | static void nfs_free_client(struct nfs_client *clp) | |
294 | { | |
295 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); | |
296 | ||
297 | nfs4_shutdown_client(clp); | |
298 | ||
299 | nfs_fscache_release_client_cookie(clp); | |
300 | ||
301 | /* -EIO all pending I/O */ | |
302 | if (!IS_ERR(clp->cl_rpcclient)) | |
303 | rpc_shutdown_client(clp->cl_rpcclient); | |
304 | ||
305 | if (clp->cl_machine_cred != NULL) | |
306 | put_rpccred(clp->cl_machine_cred); | |
307 | ||
308 | put_net(clp->cl_net); | |
309 | kfree(clp->cl_hostname); | |
310 | kfree(clp); | |
311 | ||
312 | dprintk("<-- nfs_free_client()\n"); | |
313 | } | |
314 | ||
315 | /* | |
316 | * Release a reference to a shared client record | |
317 | */ | |
318 | void nfs_put_client(struct nfs_client *clp) | |
319 | { | |
320 | struct nfs_net *nn; | |
321 | ||
322 | if (!clp) | |
323 | return; | |
324 | ||
325 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); | |
326 | nn = net_generic(clp->cl_net, nfs_net_id); | |
327 | ||
328 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { | |
329 | list_del(&clp->cl_share_link); | |
330 | nfs_cb_idr_remove_locked(clp); | |
331 | spin_unlock(&nn->nfs_client_lock); | |
332 | ||
333 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
334 | ||
335 | nfs_free_client(clp); | |
336 | } | |
337 | } | |
338 | EXPORT_SYMBOL_GPL(nfs_put_client); | |
339 | ||
340 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
341 | /* | |
342 | * Test if two ip6 socket addresses refer to the same socket by | |
343 | * comparing relevant fields. The padding bytes specifically, are not | |
344 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
345 | * and sin6_scope_id is only compared if the address is "link local" | |
346 | * because "link local" addresses need only be unique to a specific | |
347 | * link. Conversely, ordinary unicast addresses might have different | |
348 | * sin6_scope_id. | |
349 | * | |
350 | * The caller should ensure both socket addresses are AF_INET6. | |
351 | */ | |
352 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
353 | const struct sockaddr *sa2) | |
354 | { | |
355 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
356 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
357 | ||
358 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) | |
359 | return 0; | |
360 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
361 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
362 | ||
363 | return 1; | |
364 | } | |
365 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ | |
366 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
367 | const struct sockaddr *sa2) | |
368 | { | |
369 | return 0; | |
370 | } | |
371 | #endif | |
372 | ||
373 | /* | |
374 | * Test if two ip4 socket addresses refer to the same socket, by | |
375 | * comparing relevant fields. The padding bytes specifically, are | |
376 | * not compared. | |
377 | * | |
378 | * The caller should ensure both socket addresses are AF_INET. | |
379 | */ | |
380 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, | |
381 | const struct sockaddr *sa2) | |
382 | { | |
383 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
384 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
385 | ||
386 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
387 | } | |
388 | ||
389 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
390 | const struct sockaddr *sa2) | |
391 | { | |
392 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
393 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
394 | ||
395 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
396 | (sin1->sin6_port == sin2->sin6_port); | |
397 | } | |
398 | ||
399 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, | |
400 | const struct sockaddr *sa2) | |
401 | { | |
402 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
403 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
404 | ||
405 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && | |
406 | (sin1->sin_port == sin2->sin_port); | |
407 | } | |
408 | ||
409 | #if defined(CONFIG_NFS_V4_1) | |
410 | /* | |
411 | * Test if two socket addresses represent the same actual socket, | |
412 | * by comparing (only) relevant fields, excluding the port number. | |
413 | */ | |
414 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
415 | const struct sockaddr *sa2) | |
416 | { | |
417 | if (sa1->sa_family != sa2->sa_family) | |
418 | return 0; | |
419 | ||
420 | switch (sa1->sa_family) { | |
421 | case AF_INET: | |
422 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
423 | case AF_INET6: | |
424 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
425 | } | |
426 | return 0; | |
427 | } | |
428 | #endif /* CONFIG_NFS_V4_1 */ | |
429 | ||
430 | /* | |
431 | * Test if two socket addresses represent the same actual socket, | |
432 | * by comparing (only) relevant fields, including the port number. | |
433 | */ | |
434 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
435 | const struct sockaddr *sa2) | |
436 | { | |
437 | if (sa1->sa_family != sa2->sa_family) | |
438 | return 0; | |
439 | ||
440 | switch (sa1->sa_family) { | |
441 | case AF_INET: | |
442 | return nfs_sockaddr_cmp_ip4(sa1, sa2); | |
443 | case AF_INET6: | |
444 | return nfs_sockaddr_cmp_ip6(sa1, sa2); | |
445 | } | |
446 | return 0; | |
447 | } | |
448 | ||
449 | #if defined(CONFIG_NFS_V4_1) | |
450 | /* Common match routine for v4.0 and v4.1 callback services */ | |
451 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
452 | struct nfs_client *clp, u32 minorversion) | |
453 | { | |
454 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
455 | ||
456 | /* Don't match clients that failed to initialise */ | |
457 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
458 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
459 | return false; | |
460 | ||
461 | /* Match the version and minorversion */ | |
462 | if (clp->rpc_ops->version != 4 || | |
463 | clp->cl_minorversion != minorversion) | |
464 | return false; | |
465 | ||
466 | /* Match only the IP address, not the port number */ | |
467 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
468 | return false; | |
469 | ||
470 | return true; | |
471 | } | |
472 | #endif /* CONFIG_NFS_V4_1 */ | |
473 | ||
474 | /* | |
475 | * Find an nfs_client on the list that matches the initialisation data | |
476 | * that is supplied. | |
477 | */ | |
478 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) | |
479 | { | |
480 | struct nfs_client *clp; | |
481 | const struct sockaddr *sap = data->addr; | |
482 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); | |
483 | ||
484 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
485 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
486 | /* Don't match clients that failed to initialise properly */ | |
487 | if (clp->cl_cons_state < 0) | |
488 | continue; | |
489 | ||
490 | /* Different NFS versions cannot share the same nfs_client */ | |
491 | if (clp->rpc_ops != data->rpc_ops) | |
492 | continue; | |
493 | ||
494 | if (clp->cl_proto != data->proto) | |
495 | continue; | |
496 | /* Match nfsv4 minorversion */ | |
497 | if (clp->cl_minorversion != data->minorversion) | |
498 | continue; | |
499 | /* Match the full socket address */ | |
500 | if (!nfs_sockaddr_cmp(sap, clap)) | |
501 | continue; | |
502 | ||
503 | atomic_inc(&clp->cl_count); | |
504 | return clp; | |
505 | } | |
506 | return NULL; | |
507 | } | |
508 | ||
509 | /* | |
510 | * Look up a client by IP address and protocol version | |
511 | * - creates a new record if one doesn't yet exist | |
512 | */ | |
513 | static struct nfs_client * | |
514 | nfs_get_client(const struct nfs_client_initdata *cl_init, | |
515 | const struct rpc_timeout *timeparms, | |
516 | const char *ip_addr, | |
517 | rpc_authflavor_t authflavour, | |
518 | int noresvport) | |
519 | { | |
520 | struct nfs_client *clp, *new = NULL; | |
521 | int error; | |
522 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); | |
523 | ||
524 | dprintk("--> nfs_get_client(%s,v%u)\n", | |
525 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
526 | ||
527 | /* see if the client already exists */ | |
528 | do { | |
529 | spin_lock(&nn->nfs_client_lock); | |
530 | ||
531 | clp = nfs_match_client(cl_init); | |
532 | if (clp) | |
533 | goto found_client; | |
534 | if (new) | |
535 | goto install_client; | |
536 | ||
537 | spin_unlock(&nn->nfs_client_lock); | |
538 | ||
539 | new = nfs_alloc_client(cl_init); | |
540 | } while (!IS_ERR(new)); | |
541 | ||
542 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); | |
543 | return new; | |
544 | ||
545 | /* install a new client and return with it unready */ | |
546 | install_client: | |
547 | clp = new; | |
548 | list_add(&clp->cl_share_link, &nn->nfs_client_list); | |
549 | spin_unlock(&nn->nfs_client_lock); | |
550 | ||
551 | error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr, | |
552 | authflavour, noresvport); | |
553 | if (error < 0) { | |
554 | nfs_put_client(clp); | |
555 | return ERR_PTR(error); | |
556 | } | |
557 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
558 | return clp; | |
559 | ||
560 | /* found an existing client | |
561 | * - make sure it's ready before returning | |
562 | */ | |
563 | found_client: | |
564 | spin_unlock(&nn->nfs_client_lock); | |
565 | ||
566 | if (new) | |
567 | nfs_free_client(new); | |
568 | ||
569 | error = wait_event_killable(nfs_client_active_wq, | |
570 | clp->cl_cons_state < NFS_CS_INITING); | |
571 | if (error < 0) { | |
572 | nfs_put_client(clp); | |
573 | return ERR_PTR(-ERESTARTSYS); | |
574 | } | |
575 | ||
576 | if (clp->cl_cons_state < NFS_CS_READY) { | |
577 | error = clp->cl_cons_state; | |
578 | nfs_put_client(clp); | |
579 | return ERR_PTR(error); | |
580 | } | |
581 | ||
582 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); | |
583 | ||
584 | dprintk("--> nfs_get_client() = %p [share]\n", clp); | |
585 | return clp; | |
586 | } | |
587 | ||
588 | /* | |
589 | * Mark a server as ready or failed | |
590 | */ | |
591 | void nfs_mark_client_ready(struct nfs_client *clp, int state) | |
592 | { | |
593 | clp->cl_cons_state = state; | |
594 | wake_up_all(&nfs_client_active_wq); | |
595 | } | |
596 | ||
597 | /* | |
598 | * With sessions, the client is not marked ready until after a | |
599 | * successful EXCHANGE_ID and CREATE_SESSION. | |
600 | * | |
601 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
602 | * other versions of NFS can be tried. | |
603 | */ | |
604 | int nfs4_check_client_ready(struct nfs_client *clp) | |
605 | { | |
606 | if (!nfs4_has_session(clp)) | |
607 | return 0; | |
608 | if (clp->cl_cons_state < NFS_CS_READY) | |
609 | return -EPROTONOSUPPORT; | |
610 | return 0; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Initialise the timeout values for a connection | |
615 | */ | |
616 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
617 | unsigned int timeo, unsigned int retrans) | |
618 | { | |
619 | to->to_initval = timeo * HZ / 10; | |
620 | to->to_retries = retrans; | |
621 | ||
622 | switch (proto) { | |
623 | case XPRT_TRANSPORT_TCP: | |
624 | case XPRT_TRANSPORT_RDMA: | |
625 | if (to->to_retries == 0) | |
626 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
627 | if (to->to_initval == 0) | |
628 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; | |
629 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) | |
630 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
631 | to->to_increment = to->to_initval; | |
632 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
633 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) | |
634 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
635 | if (to->to_maxval < to->to_initval) | |
636 | to->to_maxval = to->to_initval; | |
637 | to->to_exponential = 0; | |
638 | break; | |
639 | case XPRT_TRANSPORT_UDP: | |
640 | if (to->to_retries == 0) | |
641 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
642 | if (!to->to_initval) | |
643 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; | |
644 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) | |
645 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
646 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
647 | to->to_exponential = 1; | |
648 | break; | |
649 | default: | |
650 | BUG(); | |
651 | } | |
652 | } | |
653 | ||
654 | /* | |
655 | * Create an RPC client handle | |
656 | */ | |
657 | static int nfs_create_rpc_client(struct nfs_client *clp, | |
658 | const struct rpc_timeout *timeparms, | |
659 | rpc_authflavor_t flavor, | |
660 | int discrtry, int noresvport) | |
661 | { | |
662 | struct rpc_clnt *clnt = NULL; | |
663 | struct rpc_create_args args = { | |
664 | .net = clp->cl_net, | |
665 | .protocol = clp->cl_proto, | |
666 | .address = (struct sockaddr *)&clp->cl_addr, | |
667 | .addrsize = clp->cl_addrlen, | |
668 | .timeout = timeparms, | |
669 | .servername = clp->cl_hostname, | |
670 | .program = &nfs_program, | |
671 | .version = clp->rpc_ops->version, | |
672 | .authflavor = flavor, | |
673 | }; | |
674 | ||
675 | if (discrtry) | |
676 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
677 | if (noresvport) | |
678 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
679 | ||
680 | if (!IS_ERR(clp->cl_rpcclient)) | |
681 | return 0; | |
682 | ||
683 | clnt = rpc_create(&args); | |
684 | if (IS_ERR(clnt)) { | |
685 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
686 | __func__, PTR_ERR(clnt)); | |
687 | return PTR_ERR(clnt); | |
688 | } | |
689 | ||
690 | clp->cl_rpcclient = clnt; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Version 2 or 3 client destruction | |
696 | */ | |
697 | static void nfs_destroy_server(struct nfs_server *server) | |
698 | { | |
699 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || | |
700 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
701 | nlmclnt_done(server->nlm_host); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Version 2 or 3 lockd setup | |
706 | */ | |
707 | static int nfs_start_lockd(struct nfs_server *server) | |
708 | { | |
709 | struct nlm_host *host; | |
710 | struct nfs_client *clp = server->nfs_client; | |
711 | struct nlmclnt_initdata nlm_init = { | |
712 | .hostname = clp->cl_hostname, | |
713 | .address = (struct sockaddr *)&clp->cl_addr, | |
714 | .addrlen = clp->cl_addrlen, | |
715 | .nfs_version = clp->rpc_ops->version, | |
716 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? | |
717 | 1 : 0, | |
718 | .net = clp->cl_net, | |
719 | }; | |
720 | ||
721 | if (nlm_init.nfs_version > 3) | |
722 | return 0; | |
723 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && | |
724 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
725 | return 0; | |
726 | ||
727 | switch (clp->cl_proto) { | |
728 | default: | |
729 | nlm_init.protocol = IPPROTO_TCP; | |
730 | break; | |
731 | case XPRT_TRANSPORT_UDP: | |
732 | nlm_init.protocol = IPPROTO_UDP; | |
733 | } | |
734 | ||
735 | host = nlmclnt_init(&nlm_init); | |
736 | if (IS_ERR(host)) | |
737 | return PTR_ERR(host); | |
738 | ||
739 | server->nlm_host = host; | |
740 | server->destroy = nfs_destroy_server; | |
741 | return 0; | |
742 | } | |
743 | ||
744 | /* | |
745 | * Initialise an NFSv3 ACL client connection | |
746 | */ | |
747 | #ifdef CONFIG_NFS_V3_ACL | |
748 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
749 | { | |
750 | if (server->nfs_client->rpc_ops->version != 3) | |
751 | goto out_noacl; | |
752 | if (server->flags & NFS_MOUNT_NOACL) | |
753 | goto out_noacl; | |
754 | ||
755 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
756 | if (IS_ERR(server->client_acl)) | |
757 | goto out_noacl; | |
758 | ||
759 | /* No errors! Assume that Sun nfsacls are supported */ | |
760 | server->caps |= NFS_CAP_ACLS; | |
761 | return; | |
762 | ||
763 | out_noacl: | |
764 | server->caps &= ~NFS_CAP_ACLS; | |
765 | } | |
766 | #else | |
767 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
768 | { | |
769 | server->flags &= ~NFS_MOUNT_NOACL; | |
770 | server->caps &= ~NFS_CAP_ACLS; | |
771 | } | |
772 | #endif | |
773 | ||
774 | /* | |
775 | * Create a general RPC client | |
776 | */ | |
777 | static int nfs_init_server_rpcclient(struct nfs_server *server, | |
778 | const struct rpc_timeout *timeo, | |
779 | rpc_authflavor_t pseudoflavour) | |
780 | { | |
781 | struct nfs_client *clp = server->nfs_client; | |
782 | ||
783 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
784 | if (IS_ERR(server->client)) { | |
785 | dprintk("%s: couldn't create rpc_client!\n", __func__); | |
786 | return PTR_ERR(server->client); | |
787 | } | |
788 | ||
789 | memcpy(&server->client->cl_timeout_default, | |
790 | timeo, | |
791 | sizeof(server->client->cl_timeout_default)); | |
792 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
793 | ||
794 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { | |
795 | struct rpc_auth *auth; | |
796 | ||
797 | auth = rpcauth_create(pseudoflavour, server->client); | |
798 | if (IS_ERR(auth)) { | |
799 | dprintk("%s: couldn't create credcache!\n", __func__); | |
800 | return PTR_ERR(auth); | |
801 | } | |
802 | } | |
803 | server->client->cl_softrtry = 0; | |
804 | if (server->flags & NFS_MOUNT_SOFT) | |
805 | server->client->cl_softrtry = 1; | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Initialise an NFS2 or NFS3 client | |
812 | */ | |
813 | int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms, | |
814 | const char *ip_addr, rpc_authflavor_t authflavour, | |
815 | int noresvport) | |
816 | { | |
817 | int error; | |
818 | ||
819 | if (clp->cl_cons_state == NFS_CS_READY) { | |
820 | /* the client is already initialised */ | |
821 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
822 | return 0; | |
823 | } | |
824 | ||
825 | /* | |
826 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
827 | * - RFC 2623, sec 2.3.2 | |
828 | */ | |
829 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, | |
830 | 0, noresvport); | |
831 | if (error < 0) | |
832 | goto error; | |
833 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
834 | return 0; | |
835 | ||
836 | error: | |
837 | nfs_mark_client_ready(clp, error); | |
838 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
839 | return error; | |
840 | } | |
841 | ||
842 | /* | |
843 | * Create a version 2 or 3 client | |
844 | */ | |
845 | static int nfs_init_server(struct nfs_server *server, | |
846 | const struct nfs_parsed_mount_data *data) | |
847 | { | |
848 | struct nfs_client_initdata cl_init = { | |
849 | .hostname = data->nfs_server.hostname, | |
850 | .addr = (const struct sockaddr *)&data->nfs_server.address, | |
851 | .addrlen = data->nfs_server.addrlen, | |
852 | .rpc_ops = NULL, | |
853 | .proto = data->nfs_server.protocol, | |
854 | .net = data->net, | |
855 | }; | |
856 | struct rpc_timeout timeparms; | |
857 | struct nfs_client *clp; | |
858 | int error; | |
859 | ||
860 | dprintk("--> nfs_init_server()\n"); | |
861 | ||
862 | switch (data->version) { | |
863 | #ifdef CONFIG_NFS_V2 | |
864 | case 2: | |
865 | cl_init.rpc_ops = &nfs_v2_clientops; | |
866 | break; | |
867 | #endif | |
868 | #ifdef CONFIG_NFS_V3 | |
869 | case 3: | |
870 | cl_init.rpc_ops = &nfs_v3_clientops; | |
871 | break; | |
872 | #endif | |
873 | default: | |
874 | return -EPROTONOSUPPORT; | |
875 | } | |
876 | ||
877 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
878 | data->timeo, data->retrans); | |
879 | ||
880 | /* Allocate or find a client reference we can use */ | |
881 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX, | |
882 | data->flags & NFS_MOUNT_NORESVPORT); | |
883 | if (IS_ERR(clp)) { | |
884 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
885 | return PTR_ERR(clp); | |
886 | } | |
887 | ||
888 | server->nfs_client = clp; | |
889 | ||
890 | /* Initialise the client representation from the mount data */ | |
891 | server->flags = data->flags; | |
892 | server->options = data->options; | |
893 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
894 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
895 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; | |
896 | ||
897 | if (data->rsize) | |
898 | server->rsize = nfs_block_size(data->rsize, NULL); | |
899 | if (data->wsize) | |
900 | server->wsize = nfs_block_size(data->wsize, NULL); | |
901 | ||
902 | server->acregmin = data->acregmin * HZ; | |
903 | server->acregmax = data->acregmax * HZ; | |
904 | server->acdirmin = data->acdirmin * HZ; | |
905 | server->acdirmax = data->acdirmax * HZ; | |
906 | ||
907 | /* Start lockd here, before we might error out */ | |
908 | error = nfs_start_lockd(server); | |
909 | if (error < 0) | |
910 | goto error; | |
911 | ||
912 | server->port = data->nfs_server.port; | |
913 | ||
914 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); | |
915 | if (error < 0) | |
916 | goto error; | |
917 | ||
918 | /* Preserve the values of mount_server-related mount options */ | |
919 | if (data->mount_server.addrlen) { | |
920 | memcpy(&server->mountd_address, &data->mount_server.address, | |
921 | data->mount_server.addrlen); | |
922 | server->mountd_addrlen = data->mount_server.addrlen; | |
923 | } | |
924 | server->mountd_version = data->mount_server.version; | |
925 | server->mountd_port = data->mount_server.port; | |
926 | server->mountd_protocol = data->mount_server.protocol; | |
927 | ||
928 | server->namelen = data->namlen; | |
929 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
930 | nfs_init_server_aclclient(server); | |
931 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); | |
932 | return 0; | |
933 | ||
934 | error: | |
935 | server->nfs_client = NULL; | |
936 | nfs_put_client(clp); | |
937 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
938 | return error; | |
939 | } | |
940 | ||
941 | /* | |
942 | * Load up the server record from information gained in an fsinfo record | |
943 | */ | |
944 | static void nfs_server_set_fsinfo(struct nfs_server *server, | |
945 | struct nfs_fh *mntfh, | |
946 | struct nfs_fsinfo *fsinfo) | |
947 | { | |
948 | unsigned long max_rpc_payload; | |
949 | ||
950 | /* Work out a lot of parameters */ | |
951 | if (server->rsize == 0) | |
952 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
953 | if (server->wsize == 0) | |
954 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
955 | ||
956 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
957 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
958 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
959 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
960 | ||
961 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
962 | if (server->rsize > max_rpc_payload) | |
963 | server->rsize = max_rpc_payload; | |
964 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
965 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
966 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
967 | ||
968 | server->backing_dev_info.name = "nfs"; | |
969 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
970 | ||
971 | if (server->wsize > max_rpc_payload) | |
972 | server->wsize = max_rpc_payload; | |
973 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
974 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
975 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
976 | server->pnfs_blksize = fsinfo->blksize; | |
977 | set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype); | |
978 | ||
979 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
980 | ||
981 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
982 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) | |
983 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
984 | if (server->dtsize > server->rsize) | |
985 | server->dtsize = server->rsize; | |
986 | ||
987 | if (server->flags & NFS_MOUNT_NOAC) { | |
988 | server->acregmin = server->acregmax = 0; | |
989 | server->acdirmin = server->acdirmax = 0; | |
990 | } | |
991 | ||
992 | server->maxfilesize = fsinfo->maxfilesize; | |
993 | ||
994 | server->time_delta = fsinfo->time_delta; | |
995 | ||
996 | /* We're airborne Set socket buffersize */ | |
997 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Probe filesystem information, including the FSID on v2/v3 | |
1002 | */ | |
1003 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
1004 | { | |
1005 | struct nfs_fsinfo fsinfo; | |
1006 | struct nfs_client *clp = server->nfs_client; | |
1007 | int error; | |
1008 | ||
1009 | dprintk("--> nfs_probe_fsinfo()\n"); | |
1010 | ||
1011 | if (clp->rpc_ops->set_capabilities != NULL) { | |
1012 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
1013 | if (error < 0) | |
1014 | goto out_error; | |
1015 | } | |
1016 | ||
1017 | fsinfo.fattr = fattr; | |
1018 | fsinfo.layouttype = 0; | |
1019 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); | |
1020 | if (error < 0) | |
1021 | goto out_error; | |
1022 | ||
1023 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); | |
1024 | ||
1025 | /* Get some general file system info */ | |
1026 | if (server->namelen == 0) { | |
1027 | struct nfs_pathconf pathinfo; | |
1028 | ||
1029 | pathinfo.fattr = fattr; | |
1030 | nfs_fattr_init(fattr); | |
1031 | ||
1032 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
1033 | server->namelen = pathinfo.max_namelen; | |
1034 | } | |
1035 | ||
1036 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
1037 | return 0; | |
1038 | ||
1039 | out_error: | |
1040 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
1041 | return error; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Copy useful information when duplicating a server record | |
1046 | */ | |
1047 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
1048 | { | |
1049 | target->flags = source->flags; | |
1050 | target->rsize = source->rsize; | |
1051 | target->wsize = source->wsize; | |
1052 | target->acregmin = source->acregmin; | |
1053 | target->acregmax = source->acregmax; | |
1054 | target->acdirmin = source->acdirmin; | |
1055 | target->acdirmax = source->acdirmax; | |
1056 | target->caps = source->caps; | |
1057 | target->options = source->options; | |
1058 | } | |
1059 | ||
1060 | static void nfs_server_insert_lists(struct nfs_server *server) | |
1061 | { | |
1062 | struct nfs_client *clp = server->nfs_client; | |
1063 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
1064 | ||
1065 | spin_lock(&nn->nfs_client_lock); | |
1066 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); | |
1067 | list_add_tail(&server->master_link, &nn->nfs_volume_list); | |
1068 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
1069 | spin_unlock(&nn->nfs_client_lock); | |
1070 | ||
1071 | } | |
1072 | ||
1073 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1074 | { | |
1075 | struct nfs_client *clp = server->nfs_client; | |
1076 | struct nfs_net *nn; | |
1077 | ||
1078 | if (clp == NULL) | |
1079 | return; | |
1080 | nn = net_generic(clp->cl_net, nfs_net_id); | |
1081 | spin_lock(&nn->nfs_client_lock); | |
1082 | list_del_rcu(&server->client_link); | |
1083 | if (list_empty(&clp->cl_superblocks)) | |
1084 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
1085 | list_del(&server->master_link); | |
1086 | spin_unlock(&nn->nfs_client_lock); | |
1087 | ||
1088 | synchronize_rcu(); | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Allocate and initialise a server record | |
1093 | */ | |
1094 | static struct nfs_server *nfs_alloc_server(void) | |
1095 | { | |
1096 | struct nfs_server *server; | |
1097 | ||
1098 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1099 | if (!server) | |
1100 | return NULL; | |
1101 | ||
1102 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1103 | ||
1104 | /* Zero out the NFS state stuff */ | |
1105 | INIT_LIST_HEAD(&server->client_link); | |
1106 | INIT_LIST_HEAD(&server->master_link); | |
1107 | INIT_LIST_HEAD(&server->delegations); | |
1108 | INIT_LIST_HEAD(&server->layouts); | |
1109 | INIT_LIST_HEAD(&server->state_owners_lru); | |
1110 | ||
1111 | atomic_set(&server->active, 0); | |
1112 | ||
1113 | server->io_stats = nfs_alloc_iostats(); | |
1114 | if (!server->io_stats) { | |
1115 | kfree(server); | |
1116 | return NULL; | |
1117 | } | |
1118 | ||
1119 | if (bdi_init(&server->backing_dev_info)) { | |
1120 | nfs_free_iostats(server->io_stats); | |
1121 | kfree(server); | |
1122 | return NULL; | |
1123 | } | |
1124 | ||
1125 | ida_init(&server->openowner_id); | |
1126 | ida_init(&server->lockowner_id); | |
1127 | pnfs_init_server(server); | |
1128 | ||
1129 | return server; | |
1130 | } | |
1131 | ||
1132 | /* | |
1133 | * Free up a server record | |
1134 | */ | |
1135 | void nfs_free_server(struct nfs_server *server) | |
1136 | { | |
1137 | dprintk("--> nfs_free_server()\n"); | |
1138 | ||
1139 | nfs_server_remove_lists(server); | |
1140 | unset_pnfs_layoutdriver(server); | |
1141 | ||
1142 | if (server->destroy != NULL) | |
1143 | server->destroy(server); | |
1144 | ||
1145 | if (!IS_ERR(server->client_acl)) | |
1146 | rpc_shutdown_client(server->client_acl); | |
1147 | if (!IS_ERR(server->client)) | |
1148 | rpc_shutdown_client(server->client); | |
1149 | ||
1150 | nfs_put_client(server->nfs_client); | |
1151 | ||
1152 | ida_destroy(&server->lockowner_id); | |
1153 | ida_destroy(&server->openowner_id); | |
1154 | nfs_free_iostats(server->io_stats); | |
1155 | bdi_destroy(&server->backing_dev_info); | |
1156 | kfree(server); | |
1157 | nfs_release_automount_timer(); | |
1158 | dprintk("<-- nfs_free_server()\n"); | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * Create a version 2 or 3 volume record | |
1163 | * - keyed on server and FSID | |
1164 | */ | |
1165 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, | |
1166 | struct nfs_fh *mntfh) | |
1167 | { | |
1168 | struct nfs_server *server; | |
1169 | struct nfs_fattr *fattr; | |
1170 | int error; | |
1171 | ||
1172 | server = nfs_alloc_server(); | |
1173 | if (!server) | |
1174 | return ERR_PTR(-ENOMEM); | |
1175 | ||
1176 | error = -ENOMEM; | |
1177 | fattr = nfs_alloc_fattr(); | |
1178 | if (fattr == NULL) | |
1179 | goto error; | |
1180 | ||
1181 | /* Get a client representation */ | |
1182 | error = nfs_init_server(server, data); | |
1183 | if (error < 0) | |
1184 | goto error; | |
1185 | ||
1186 | BUG_ON(!server->nfs_client); | |
1187 | BUG_ON(!server->nfs_client->rpc_ops); | |
1188 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1189 | ||
1190 | /* Probe the root fh to retrieve its FSID */ | |
1191 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1192 | if (error < 0) | |
1193 | goto error; | |
1194 | if (server->nfs_client->rpc_ops->version == 3) { | |
1195 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1196 | server->namelen = NFS3_MAXNAMLEN; | |
1197 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1198 | server->caps |= NFS_CAP_READDIRPLUS; | |
1199 | } else { | |
1200 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1201 | server->namelen = NFS2_MAXNAMLEN; | |
1202 | } | |
1203 | ||
1204 | if (!(fattr->valid & NFS_ATTR_FATTR)) { | |
1205 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
1206 | if (error < 0) { | |
1207 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1208 | goto error; | |
1209 | } | |
1210 | } | |
1211 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); | |
1212 | ||
1213 | dprintk("Server FSID: %llx:%llx\n", | |
1214 | (unsigned long long) server->fsid.major, | |
1215 | (unsigned long long) server->fsid.minor); | |
1216 | ||
1217 | nfs_server_insert_lists(server); | |
1218 | server->mount_time = jiffies; | |
1219 | nfs_free_fattr(fattr); | |
1220 | return server; | |
1221 | ||
1222 | error: | |
1223 | nfs_free_fattr(fattr); | |
1224 | nfs_free_server(server); | |
1225 | return ERR_PTR(error); | |
1226 | } | |
1227 | ||
1228 | #ifdef CONFIG_NFS_V4 | |
1229 | /* | |
1230 | * NFSv4.0 callback thread helper | |
1231 | * | |
1232 | * Find a client by callback identifier | |
1233 | */ | |
1234 | struct nfs_client * | |
1235 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
1236 | { | |
1237 | struct nfs_client *clp; | |
1238 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1239 | ||
1240 | spin_lock(&nn->nfs_client_lock); | |
1241 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
1242 | if (clp) | |
1243 | atomic_inc(&clp->cl_count); | |
1244 | spin_unlock(&nn->nfs_client_lock); | |
1245 | return clp; | |
1246 | } | |
1247 | ||
1248 | #if defined(CONFIG_NFS_V4_1) | |
1249 | /* | |
1250 | * NFSv4.1 callback thread helper | |
1251 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1252 | * minorversion, and sessionID | |
1253 | * | |
1254 | * Returns NULL if no such client | |
1255 | */ | |
1256 | struct nfs_client * | |
1257 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
1258 | struct nfs4_sessionid *sid) | |
1259 | { | |
1260 | struct nfs_client *clp; | |
1261 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1262 | ||
1263 | spin_lock(&nn->nfs_client_lock); | |
1264 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
1265 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
1266 | continue; | |
1267 | ||
1268 | if (!nfs4_has_session(clp)) | |
1269 | continue; | |
1270 | ||
1271 | /* Match sessionid*/ | |
1272 | if (memcmp(clp->cl_session->sess_id.data, | |
1273 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
1274 | continue; | |
1275 | ||
1276 | atomic_inc(&clp->cl_count); | |
1277 | spin_unlock(&nn->nfs_client_lock); | |
1278 | return clp; | |
1279 | } | |
1280 | spin_unlock(&nn->nfs_client_lock); | |
1281 | return NULL; | |
1282 | } | |
1283 | ||
1284 | #else /* CONFIG_NFS_V4_1 */ | |
1285 | ||
1286 | struct nfs_client * | |
1287 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
1288 | struct nfs4_sessionid *sid) | |
1289 | { | |
1290 | return NULL; | |
1291 | } | |
1292 | #endif /* CONFIG_NFS_V4_1 */ | |
1293 | ||
1294 | /* | |
1295 | * Initialize the NFS4 callback service | |
1296 | */ | |
1297 | static int nfs4_init_callback(struct nfs_client *clp) | |
1298 | { | |
1299 | int error; | |
1300 | ||
1301 | if (clp->rpc_ops->version == 4) { | |
1302 | struct rpc_xprt *xprt; | |
1303 | ||
1304 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); | |
1305 | ||
1306 | if (nfs4_has_session(clp)) { | |
1307 | error = xprt_setup_backchannel(xprt, | |
1308 | NFS41_BC_MIN_CALLBACKS); | |
1309 | if (error < 0) | |
1310 | return error; | |
1311 | } | |
1312 | ||
1313 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
1314 | if (error < 0) { | |
1315 | dprintk("%s: failed to start callback. Error = %d\n", | |
1316 | __func__, error); | |
1317 | return error; | |
1318 | } | |
1319 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1320 | } | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Initialize the minor version specific parts of an NFS4 client record | |
1326 | */ | |
1327 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1328 | { | |
1329 | #if defined(CONFIG_NFS_V4_1) | |
1330 | if (clp->cl_mvops->minor_version) { | |
1331 | struct nfs4_session *session = NULL; | |
1332 | /* | |
1333 | * Create the session and mark it expired. | |
1334 | * When a SEQUENCE operation encounters the expired session | |
1335 | * it will do session recovery to initialize it. | |
1336 | */ | |
1337 | session = nfs4_alloc_session(clp); | |
1338 | if (!session) | |
1339 | return -ENOMEM; | |
1340 | ||
1341 | clp->cl_session = session; | |
1342 | /* | |
1343 | * The create session reply races with the server back | |
1344 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1345 | * so that the client back channel can find the | |
1346 | * nfs_client struct | |
1347 | */ | |
1348 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
1349 | } | |
1350 | #endif /* CONFIG_NFS_V4_1 */ | |
1351 | ||
1352 | return nfs4_init_callback(clp); | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Initialise an NFS4 client record | |
1357 | */ | |
1358 | int nfs4_init_client(struct nfs_client *clp, | |
1359 | const struct rpc_timeout *timeparms, | |
1360 | const char *ip_addr, | |
1361 | rpc_authflavor_t authflavour, | |
1362 | int noresvport) | |
1363 | { | |
1364 | char buf[INET6_ADDRSTRLEN + 1]; | |
1365 | int error; | |
1366 | ||
1367 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1368 | /* the client is initialised already */ | |
1369 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1374 | clp->rpc_ops = &nfs_v4_clientops; | |
1375 | ||
1376 | error = nfs_create_rpc_client(clp, timeparms, authflavour, | |
1377 | 1, noresvport); | |
1378 | if (error < 0) | |
1379 | goto error; | |
1380 | ||
1381 | /* If no clientaddr= option was specified, find a usable cb address */ | |
1382 | if (ip_addr == NULL) { | |
1383 | struct sockaddr_storage cb_addr; | |
1384 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
1385 | ||
1386 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
1387 | if (error < 0) | |
1388 | goto error; | |
1389 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
1390 | if (error < 0) | |
1391 | goto error; | |
1392 | ip_addr = (const char *)buf; | |
1393 | } | |
1394 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); | |
1395 | ||
1396 | error = nfs_idmap_new(clp); | |
1397 | if (error < 0) { | |
1398 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
1399 | __func__, error); | |
1400 | goto error; | |
1401 | } | |
1402 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
1403 | ||
1404 | error = nfs4_init_client_minor_version(clp); | |
1405 | if (error < 0) | |
1406 | goto error; | |
1407 | ||
1408 | if (!nfs4_has_session(clp)) | |
1409 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
1410 | return 0; | |
1411 | ||
1412 | error: | |
1413 | nfs_mark_client_ready(clp, error); | |
1414 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1415 | return error; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * Set up an NFS4 client | |
1420 | */ | |
1421 | static int nfs4_set_client(struct nfs_server *server, | |
1422 | const char *hostname, | |
1423 | const struct sockaddr *addr, | |
1424 | const size_t addrlen, | |
1425 | const char *ip_addr, | |
1426 | rpc_authflavor_t authflavour, | |
1427 | int proto, const struct rpc_timeout *timeparms, | |
1428 | u32 minorversion, struct net *net) | |
1429 | { | |
1430 | struct nfs_client_initdata cl_init = { | |
1431 | .hostname = hostname, | |
1432 | .addr = addr, | |
1433 | .addrlen = addrlen, | |
1434 | .rpc_ops = &nfs_v4_clientops, | |
1435 | .proto = proto, | |
1436 | .minorversion = minorversion, | |
1437 | .net = net, | |
1438 | }; | |
1439 | struct nfs_client *clp; | |
1440 | int error; | |
1441 | ||
1442 | dprintk("--> nfs4_set_client()\n"); | |
1443 | ||
1444 | /* Allocate or find a client reference we can use */ | |
1445 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour, | |
1446 | server->flags & NFS_MOUNT_NORESVPORT); | |
1447 | if (IS_ERR(clp)) { | |
1448 | error = PTR_ERR(clp); | |
1449 | goto error; | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * Query for the lease time on clientid setup or renewal | |
1454 | * | |
1455 | * Note that this will be set on nfs_clients that were created | |
1456 | * only for the DS role and did not set this bit, but now will | |
1457 | * serve a dual role. | |
1458 | */ | |
1459 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
1460 | ||
1461 | server->nfs_client = clp; | |
1462 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1463 | return 0; | |
1464 | error: | |
1465 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1466 | return error; | |
1467 | } | |
1468 | ||
1469 | /* | |
1470 | * Set up a pNFS Data Server client. | |
1471 | * | |
1472 | * Return any existing nfs_client that matches server address,port,version | |
1473 | * and minorversion. | |
1474 | * | |
1475 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
1476 | * low timeout interval so that if a connection is lost, we retry through | |
1477 | * the MDS. | |
1478 | */ | |
1479 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
1480 | const struct sockaddr *ds_addr, int ds_addrlen, | |
1481 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) | |
1482 | { | |
1483 | struct nfs_client_initdata cl_init = { | |
1484 | .addr = ds_addr, | |
1485 | .addrlen = ds_addrlen, | |
1486 | .rpc_ops = &nfs_v4_clientops, | |
1487 | .proto = ds_proto, | |
1488 | .minorversion = mds_clp->cl_minorversion, | |
1489 | .net = mds_clp->cl_net, | |
1490 | }; | |
1491 | struct rpc_timeout ds_timeout; | |
1492 | struct nfs_client *clp; | |
1493 | ||
1494 | /* | |
1495 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1496 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1497 | * (section 13.1 RFC 5661). | |
1498 | */ | |
1499 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
1500 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
1501 | mds_clp->cl_rpcclient->cl_auth->au_flavor, 0); | |
1502 | ||
1503 | dprintk("<-- %s %p\n", __func__, clp); | |
1504 | return clp; | |
1505 | } | |
1506 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
1507 | ||
1508 | /* | |
1509 | * Session has been established, and the client marked ready. | |
1510 | * Set the mount rsize and wsize with negotiated fore channel | |
1511 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1512 | */ | |
1513 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1514 | { | |
1515 | #ifdef CONFIG_NFS_V4_1 | |
1516 | struct nfs4_session *sess; | |
1517 | u32 server_resp_sz; | |
1518 | u32 server_rqst_sz; | |
1519 | ||
1520 | if (!nfs4_has_session(server->nfs_client)) | |
1521 | return; | |
1522 | sess = server->nfs_client->cl_session; | |
1523 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1524 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1525 | ||
1526 | if (server->rsize > server_resp_sz) | |
1527 | server->rsize = server_resp_sz; | |
1528 | if (server->wsize > server_rqst_sz) | |
1529 | server->wsize = server_rqst_sz; | |
1530 | #endif /* CONFIG_NFS_V4_1 */ | |
1531 | } | |
1532 | ||
1533 | static int nfs4_server_common_setup(struct nfs_server *server, | |
1534 | struct nfs_fh *mntfh) | |
1535 | { | |
1536 | struct nfs_fattr *fattr; | |
1537 | int error; | |
1538 | ||
1539 | BUG_ON(!server->nfs_client); | |
1540 | BUG_ON(!server->nfs_client->rpc_ops); | |
1541 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1542 | ||
1543 | /* data servers support only a subset of NFSv4.1 */ | |
1544 | if (is_ds_only_client(server->nfs_client)) | |
1545 | return -EPROTONOSUPPORT; | |
1546 | ||
1547 | fattr = nfs_alloc_fattr(); | |
1548 | if (fattr == NULL) | |
1549 | return -ENOMEM; | |
1550 | ||
1551 | /* We must ensure the session is initialised first */ | |
1552 | error = nfs4_init_session(server); | |
1553 | if (error < 0) | |
1554 | goto out; | |
1555 | ||
1556 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1557 | error = nfs4_get_rootfh(server, mntfh); | |
1558 | if (error < 0) | |
1559 | goto out; | |
1560 | ||
1561 | dprintk("Server FSID: %llx:%llx\n", | |
1562 | (unsigned long long) server->fsid.major, | |
1563 | (unsigned long long) server->fsid.minor); | |
1564 | dprintk("Mount FH: %d\n", mntfh->size); | |
1565 | ||
1566 | nfs4_session_set_rwsize(server); | |
1567 | ||
1568 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1569 | if (error < 0) | |
1570 | goto out; | |
1571 | ||
1572 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1573 | server->namelen = NFS4_MAXNAMLEN; | |
1574 | ||
1575 | nfs_server_insert_lists(server); | |
1576 | server->mount_time = jiffies; | |
1577 | server->destroy = nfs4_destroy_server; | |
1578 | out: | |
1579 | nfs_free_fattr(fattr); | |
1580 | return error; | |
1581 | } | |
1582 | ||
1583 | /* | |
1584 | * Create a version 4 volume record | |
1585 | */ | |
1586 | static int nfs4_init_server(struct nfs_server *server, | |
1587 | const struct nfs_parsed_mount_data *data) | |
1588 | { | |
1589 | struct rpc_timeout timeparms; | |
1590 | int error; | |
1591 | ||
1592 | dprintk("--> nfs4_init_server()\n"); | |
1593 | ||
1594 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, | |
1595 | data->timeo, data->retrans); | |
1596 | ||
1597 | /* Initialise the client representation from the mount data */ | |
1598 | server->flags = data->flags; | |
1599 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; | |
1600 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1601 | server->caps |= NFS_CAP_READDIRPLUS; | |
1602 | server->options = data->options; | |
1603 | ||
1604 | /* Get a client record */ | |
1605 | error = nfs4_set_client(server, | |
1606 | data->nfs_server.hostname, | |
1607 | (const struct sockaddr *)&data->nfs_server.address, | |
1608 | data->nfs_server.addrlen, | |
1609 | data->client_address, | |
1610 | data->auth_flavors[0], | |
1611 | data->nfs_server.protocol, | |
1612 | &timeparms, | |
1613 | data->minorversion, | |
1614 | data->net); | |
1615 | if (error < 0) | |
1616 | goto error; | |
1617 | ||
1618 | /* | |
1619 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1620 | * authentication. | |
1621 | */ | |
1622 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
1623 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1624 | ||
1625 | if (data->rsize) | |
1626 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1627 | if (data->wsize) | |
1628 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1629 | ||
1630 | server->acregmin = data->acregmin * HZ; | |
1631 | server->acregmax = data->acregmax * HZ; | |
1632 | server->acdirmin = data->acdirmin * HZ; | |
1633 | server->acdirmax = data->acdirmax * HZ; | |
1634 | ||
1635 | server->port = data->nfs_server.port; | |
1636 | ||
1637 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); | |
1638 | ||
1639 | error: | |
1640 | /* Done */ | |
1641 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1642 | return error; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * Create a version 4 volume record | |
1647 | * - keyed on server and FSID | |
1648 | */ | |
1649 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, | |
1650 | struct nfs_fh *mntfh) | |
1651 | { | |
1652 | struct nfs_server *server; | |
1653 | int error; | |
1654 | ||
1655 | dprintk("--> nfs4_create_server()\n"); | |
1656 | ||
1657 | server = nfs_alloc_server(); | |
1658 | if (!server) | |
1659 | return ERR_PTR(-ENOMEM); | |
1660 | ||
1661 | /* set up the general RPC client */ | |
1662 | error = nfs4_init_server(server, data); | |
1663 | if (error < 0) | |
1664 | goto error; | |
1665 | ||
1666 | error = nfs4_server_common_setup(server, mntfh); | |
1667 | if (error < 0) | |
1668 | goto error; | |
1669 | ||
1670 | dprintk("<-- nfs4_create_server() = %p\n", server); | |
1671 | return server; | |
1672 | ||
1673 | error: | |
1674 | nfs_free_server(server); | |
1675 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1676 | return ERR_PTR(error); | |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * Create an NFS4 referral server record | |
1681 | */ | |
1682 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
1683 | struct nfs_fh *mntfh) | |
1684 | { | |
1685 | struct nfs_client *parent_client; | |
1686 | struct nfs_server *server, *parent_server; | |
1687 | int error; | |
1688 | ||
1689 | dprintk("--> nfs4_create_referral_server()\n"); | |
1690 | ||
1691 | server = nfs_alloc_server(); | |
1692 | if (!server) | |
1693 | return ERR_PTR(-ENOMEM); | |
1694 | ||
1695 | parent_server = NFS_SB(data->sb); | |
1696 | parent_client = parent_server->nfs_client; | |
1697 | ||
1698 | /* Initialise the client representation from the parent server */ | |
1699 | nfs_server_copy_userdata(server, parent_server); | |
1700 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; | |
1701 | ||
1702 | /* Get a client representation. | |
1703 | * Note: NFSv4 always uses TCP, */ | |
1704 | error = nfs4_set_client(server, data->hostname, | |
1705 | data->addr, | |
1706 | data->addrlen, | |
1707 | parent_client->cl_ipaddr, | |
1708 | data->authflavor, | |
1709 | rpc_protocol(parent_server->client), | |
1710 | parent_server->client->cl_timeout, | |
1711 | parent_client->cl_mvops->minor_version, | |
1712 | parent_client->cl_net); | |
1713 | if (error < 0) | |
1714 | goto error; | |
1715 | ||
1716 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); | |
1717 | if (error < 0) | |
1718 | goto error; | |
1719 | ||
1720 | error = nfs4_server_common_setup(server, mntfh); | |
1721 | if (error < 0) | |
1722 | goto error; | |
1723 | ||
1724 | dprintk("<-- nfs_create_referral_server() = %p\n", server); | |
1725 | return server; | |
1726 | ||
1727 | error: | |
1728 | nfs_free_server(server); | |
1729 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1730 | return ERR_PTR(error); | |
1731 | } | |
1732 | ||
1733 | #endif /* CONFIG_NFS_V4 */ | |
1734 | ||
1735 | /* | |
1736 | * Clone an NFS2, NFS3 or NFS4 server record | |
1737 | */ | |
1738 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1739 | struct nfs_fh *fh, | |
1740 | struct nfs_fattr *fattr, | |
1741 | rpc_authflavor_t flavor) | |
1742 | { | |
1743 | struct nfs_server *server; | |
1744 | struct nfs_fattr *fattr_fsinfo; | |
1745 | int error; | |
1746 | ||
1747 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
1748 | (unsigned long long) fattr->fsid.major, | |
1749 | (unsigned long long) fattr->fsid.minor); | |
1750 | ||
1751 | server = nfs_alloc_server(); | |
1752 | if (!server) | |
1753 | return ERR_PTR(-ENOMEM); | |
1754 | ||
1755 | error = -ENOMEM; | |
1756 | fattr_fsinfo = nfs_alloc_fattr(); | |
1757 | if (fattr_fsinfo == NULL) | |
1758 | goto out_free_server; | |
1759 | ||
1760 | /* Copy data from the source */ | |
1761 | server->nfs_client = source->nfs_client; | |
1762 | server->destroy = source->destroy; | |
1763 | atomic_inc(&server->nfs_client->cl_count); | |
1764 | nfs_server_copy_userdata(server, source); | |
1765 | ||
1766 | server->fsid = fattr->fsid; | |
1767 | ||
1768 | error = nfs_init_server_rpcclient(server, | |
1769 | source->client->cl_timeout, | |
1770 | flavor); | |
1771 | if (error < 0) | |
1772 | goto out_free_server; | |
1773 | if (!IS_ERR(source->client_acl)) | |
1774 | nfs_init_server_aclclient(server); | |
1775 | ||
1776 | /* probe the filesystem info for this server filesystem */ | |
1777 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); | |
1778 | if (error < 0) | |
1779 | goto out_free_server; | |
1780 | ||
1781 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1782 | server->namelen = NFS4_MAXNAMLEN; | |
1783 | ||
1784 | dprintk("Cloned FSID: %llx:%llx\n", | |
1785 | (unsigned long long) server->fsid.major, | |
1786 | (unsigned long long) server->fsid.minor); | |
1787 | ||
1788 | error = nfs_start_lockd(server); | |
1789 | if (error < 0) | |
1790 | goto out_free_server; | |
1791 | ||
1792 | nfs_server_insert_lists(server); | |
1793 | server->mount_time = jiffies; | |
1794 | ||
1795 | nfs_free_fattr(fattr_fsinfo); | |
1796 | dprintk("<-- nfs_clone_server() = %p\n", server); | |
1797 | return server; | |
1798 | ||
1799 | out_free_server: | |
1800 | nfs_free_fattr(fattr_fsinfo); | |
1801 | nfs_free_server(server); | |
1802 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1803 | return ERR_PTR(error); | |
1804 | } | |
1805 | ||
1806 | void nfs_clients_init(struct net *net) | |
1807 | { | |
1808 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1809 | ||
1810 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
1811 | INIT_LIST_HEAD(&nn->nfs_volume_list); | |
1812 | #ifdef CONFIG_NFS_V4 | |
1813 | idr_init(&nn->cb_ident_idr); | |
1814 | #endif | |
1815 | spin_lock_init(&nn->nfs_client_lock); | |
1816 | } | |
1817 | ||
1818 | #ifdef CONFIG_PROC_FS | |
1819 | static struct proc_dir_entry *proc_fs_nfs; | |
1820 | ||
1821 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1822 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1823 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1824 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1825 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1826 | ||
1827 | static const struct seq_operations nfs_server_list_ops = { | |
1828 | .start = nfs_server_list_start, | |
1829 | .next = nfs_server_list_next, | |
1830 | .stop = nfs_server_list_stop, | |
1831 | .show = nfs_server_list_show, | |
1832 | }; | |
1833 | ||
1834 | static const struct file_operations nfs_server_list_fops = { | |
1835 | .open = nfs_server_list_open, | |
1836 | .read = seq_read, | |
1837 | .llseek = seq_lseek, | |
1838 | .release = seq_release, | |
1839 | .owner = THIS_MODULE, | |
1840 | }; | |
1841 | ||
1842 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1843 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1844 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1845 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1846 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1847 | ||
1848 | static const struct seq_operations nfs_volume_list_ops = { | |
1849 | .start = nfs_volume_list_start, | |
1850 | .next = nfs_volume_list_next, | |
1851 | .stop = nfs_volume_list_stop, | |
1852 | .show = nfs_volume_list_show, | |
1853 | }; | |
1854 | ||
1855 | static const struct file_operations nfs_volume_list_fops = { | |
1856 | .open = nfs_volume_list_open, | |
1857 | .read = seq_read, | |
1858 | .llseek = seq_lseek, | |
1859 | .release = seq_release, | |
1860 | .owner = THIS_MODULE, | |
1861 | }; | |
1862 | ||
1863 | /* | |
1864 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1865 | * we're dealing | |
1866 | */ | |
1867 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1868 | { | |
1869 | struct seq_file *m; | |
1870 | int ret; | |
1871 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; | |
1872 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
1873 | ||
1874 | ret = seq_open(file, &nfs_server_list_ops); | |
1875 | if (ret < 0) | |
1876 | return ret; | |
1877 | ||
1878 | m = file->private_data; | |
1879 | m->private = net; | |
1880 | ||
1881 | return 0; | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * set up the iterator to start reading from the server list and return the first item | |
1886 | */ | |
1887 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1888 | { | |
1889 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); | |
1890 | ||
1891 | /* lock the list against modification */ | |
1892 | spin_lock(&nn->nfs_client_lock); | |
1893 | return seq_list_start_head(&nn->nfs_client_list, *_pos); | |
1894 | } | |
1895 | ||
1896 | /* | |
1897 | * move to next server | |
1898 | */ | |
1899 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1900 | { | |
1901 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); | |
1902 | ||
1903 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * clean up after reading from the transports list | |
1908 | */ | |
1909 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1910 | { | |
1911 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); | |
1912 | ||
1913 | spin_unlock(&nn->nfs_client_lock); | |
1914 | } | |
1915 | ||
1916 | /* | |
1917 | * display a header line followed by a load of call lines | |
1918 | */ | |
1919 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1920 | { | |
1921 | struct nfs_client *clp; | |
1922 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); | |
1923 | ||
1924 | /* display header on line 1 */ | |
1925 | if (v == &nn->nfs_client_list) { | |
1926 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); | |
1927 | return 0; | |
1928 | } | |
1929 | ||
1930 | /* display one transport per line on subsequent lines */ | |
1931 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1932 | ||
1933 | /* Check if the client is initialized */ | |
1934 | if (clp->cl_cons_state != NFS_CS_READY) | |
1935 | return 0; | |
1936 | ||
1937 | rcu_read_lock(); | |
1938 | seq_printf(m, "v%u %s %s %3d %s\n", | |
1939 | clp->rpc_ops->version, | |
1940 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), | |
1941 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
1942 | atomic_read(&clp->cl_count), | |
1943 | clp->cl_hostname); | |
1944 | rcu_read_unlock(); | |
1945 | ||
1946 | return 0; | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1951 | */ | |
1952 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1953 | { | |
1954 | struct seq_file *m; | |
1955 | int ret; | |
1956 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; | |
1957 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
1958 | ||
1959 | ret = seq_open(file, &nfs_volume_list_ops); | |
1960 | if (ret < 0) | |
1961 | return ret; | |
1962 | ||
1963 | m = file->private_data; | |
1964 | m->private = net; | |
1965 | ||
1966 | return 0; | |
1967 | } | |
1968 | ||
1969 | /* | |
1970 | * set up the iterator to start reading from the volume list and return the first item | |
1971 | */ | |
1972 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1973 | { | |
1974 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); | |
1975 | ||
1976 | /* lock the list against modification */ | |
1977 | spin_lock(&nn->nfs_client_lock); | |
1978 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * move to next volume | |
1983 | */ | |
1984 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1985 | { | |
1986 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); | |
1987 | ||
1988 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | * clean up after reading from the transports list | |
1993 | */ | |
1994 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1995 | { | |
1996 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); | |
1997 | ||
1998 | spin_unlock(&nn->nfs_client_lock); | |
1999 | } | |
2000 | ||
2001 | /* | |
2002 | * display a header line followed by a load of call lines | |
2003 | */ | |
2004 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
2005 | { | |
2006 | struct nfs_server *server; | |
2007 | struct nfs_client *clp; | |
2008 | char dev[8], fsid[17]; | |
2009 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); | |
2010 | ||
2011 | /* display header on line 1 */ | |
2012 | if (v == &nn->nfs_volume_list) { | |
2013 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); | |
2014 | return 0; | |
2015 | } | |
2016 | /* display one transport per line on subsequent lines */ | |
2017 | server = list_entry(v, struct nfs_server, master_link); | |
2018 | clp = server->nfs_client; | |
2019 | ||
2020 | snprintf(dev, 8, "%u:%u", | |
2021 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
2022 | ||
2023 | snprintf(fsid, 17, "%llx:%llx", | |
2024 | (unsigned long long) server->fsid.major, | |
2025 | (unsigned long long) server->fsid.minor); | |
2026 | ||
2027 | rcu_read_lock(); | |
2028 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", | |
2029 | clp->rpc_ops->version, | |
2030 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), | |
2031 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
2032 | dev, | |
2033 | fsid, | |
2034 | nfs_server_fscache_state(server)); | |
2035 | rcu_read_unlock(); | |
2036 | ||
2037 | return 0; | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * initialise the /proc/fs/nfsfs/ directory | |
2042 | */ | |
2043 | int __init nfs_fs_proc_init(void) | |
2044 | { | |
2045 | struct proc_dir_entry *p; | |
2046 | ||
2047 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); | |
2048 | if (!proc_fs_nfs) | |
2049 | goto error_0; | |
2050 | ||
2051 | /* a file of servers with which we're dealing */ | |
2052 | p = proc_create("servers", S_IFREG|S_IRUGO, | |
2053 | proc_fs_nfs, &nfs_server_list_fops); | |
2054 | if (!p) | |
2055 | goto error_1; | |
2056 | ||
2057 | /* a file of volumes that we have mounted */ | |
2058 | p = proc_create("volumes", S_IFREG|S_IRUGO, | |
2059 | proc_fs_nfs, &nfs_volume_list_fops); | |
2060 | if (!p) | |
2061 | goto error_2; | |
2062 | return 0; | |
2063 | ||
2064 | error_2: | |
2065 | remove_proc_entry("servers", proc_fs_nfs); | |
2066 | error_1: | |
2067 | remove_proc_entry("fs/nfsfs", NULL); | |
2068 | error_0: | |
2069 | return -ENOMEM; | |
2070 | } | |
2071 | ||
2072 | /* | |
2073 | * clean up the /proc/fs/nfsfs/ directory | |
2074 | */ | |
2075 | void nfs_fs_proc_exit(void) | |
2076 | { | |
2077 | remove_proc_entry("volumes", proc_fs_nfs); | |
2078 | remove_proc_entry("servers", proc_fs_nfs); | |
2079 | remove_proc_entry("fs/nfsfs", NULL); | |
2080 | } | |
2081 | ||
2082 | #endif /* CONFIG_PROC_FS */ | |
2083 | ||
2084 | module_param(nfs4_disable_idmapping, bool, 0644); | |
2085 | MODULE_PARM_DESC(nfs4_disable_idmapping, | |
2086 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |