This source file includes following definitions.
- find_nfs_version
- get_nfs_version
- put_nfs_version
- register_nfs_version
- unregister_nfs_version
- nfs_alloc_client
- nfs_cleanup_cb_ident_idr
- nfs_cb_idr_remove_locked
- pnfs_init_server
- nfs_cleanup_cb_ident_idr
- nfs_cb_idr_remove_locked
- pnfs_init_server
- nfs_free_client
- nfs_put_client
- nfs_match_client
- nfs_client_init_is_complete
- nfs_client_init_status
- nfs_wait_client_init_complete
- nfs_found_client
- nfs_get_client
- nfs_mark_client_ready
- nfs_init_timeout_values
- nfs_create_rpc_client
- nfs_destroy_server
- nfs_start_lockd
- nfs_init_server_rpcclient
- nfs_init_client
- nfs_init_server
- nfs_server_set_fsinfo
- nfs_probe_fsinfo
- nfs_server_copy_userdata
- nfs_server_insert_lists
- nfs_server_remove_lists
- nfs_alloc_server
- nfs_free_server
- nfs_create_server
- nfs_clone_server
- nfs_clients_init
- nfs_clients_exit
- nfs_server_list_start
- nfs_server_list_next
- nfs_server_list_stop
- nfs_server_list_show
- nfs_volume_list_start
- nfs_volume_list_next
- nfs_volume_list_stop
- nfs_volume_list_show
- nfs_fs_proc_net_init
- nfs_fs_proc_net_exit
- nfs_fs_proc_init
- nfs_fs_proc_exit
1
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8
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/sched.h>
12 #include <linux/time.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/string.h>
16 #include <linux/stat.h>
17 #include <linux/errno.h>
18 #include <linux/unistd.h>
19 #include <linux/sunrpc/addr.h>
20 #include <linux/sunrpc/clnt.h>
21 #include <linux/sunrpc/stats.h>
22 #include <linux/sunrpc/metrics.h>
23 #include <linux/sunrpc/xprtsock.h>
24 #include <linux/sunrpc/xprtrdma.h>
25 #include <linux/nfs_fs.h>
26 #include <linux/nfs_mount.h>
27 #include <linux/nfs4_mount.h>
28 #include <linux/lockd/bind.h>
29 #include <linux/seq_file.h>
30 #include <linux/mount.h>
31 #include <linux/vfs.h>
32 #include <linux/inet.h>
33 #include <linux/in6.h>
34 #include <linux/slab.h>
35 #include <linux/idr.h>
36 #include <net/ipv6.h>
37 #include <linux/nfs_xdr.h>
38 #include <linux/sunrpc/bc_xprt.h>
39 #include <linux/nsproxy.h>
40 #include <linux/pid_namespace.h>
41
42
43 #include "nfs4_fs.h"
44 #include "callback.h"
45 #include "delegation.h"
46 #include "iostat.h"
47 #include "internal.h"
48 #include "fscache.h"
49 #include "pnfs.h"
50 #include "nfs.h"
51 #include "netns.h"
52 #include "sysfs.h"
53
54 #define NFSDBG_FACILITY NFSDBG_CLIENT
55
56 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
57 static DEFINE_SPINLOCK(nfs_version_lock);
58 static DEFINE_MUTEX(nfs_version_mutex);
59 static LIST_HEAD(nfs_versions);
60
61
62
63
64 static const struct rpc_version *nfs_version[5] = {
65 [2] = NULL,
66 [3] = NULL,
67 [4] = NULL,
68 };
69
70 const struct rpc_program nfs_program = {
71 .name = "nfs",
72 .number = NFS_PROGRAM,
73 .nrvers = ARRAY_SIZE(nfs_version),
74 .version = nfs_version,
75 .stats = &nfs_rpcstat,
76 .pipe_dir_name = NFS_PIPE_DIRNAME,
77 };
78
79 struct rpc_stat nfs_rpcstat = {
80 .program = &nfs_program
81 };
82
83 static struct nfs_subversion *find_nfs_version(unsigned int version)
84 {
85 struct nfs_subversion *nfs;
86 spin_lock(&nfs_version_lock);
87
88 list_for_each_entry(nfs, &nfs_versions, list) {
89 if (nfs->rpc_ops->version == version) {
90 spin_unlock(&nfs_version_lock);
91 return nfs;
92 }
93 }
94
95 spin_unlock(&nfs_version_lock);
96 return ERR_PTR(-EPROTONOSUPPORT);
97 }
98
99 struct nfs_subversion *get_nfs_version(unsigned int version)
100 {
101 struct nfs_subversion *nfs = find_nfs_version(version);
102
103 if (IS_ERR(nfs)) {
104 mutex_lock(&nfs_version_mutex);
105 request_module("nfsv%d", version);
106 nfs = find_nfs_version(version);
107 mutex_unlock(&nfs_version_mutex);
108 }
109
110 if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
111 return ERR_PTR(-EAGAIN);
112 return nfs;
113 }
114
115 void put_nfs_version(struct nfs_subversion *nfs)
116 {
117 module_put(nfs->owner);
118 }
119
120 void register_nfs_version(struct nfs_subversion *nfs)
121 {
122 spin_lock(&nfs_version_lock);
123
124 list_add(&nfs->list, &nfs_versions);
125 nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers;
126
127 spin_unlock(&nfs_version_lock);
128 }
129 EXPORT_SYMBOL_GPL(register_nfs_version);
130
131 void unregister_nfs_version(struct nfs_subversion *nfs)
132 {
133 spin_lock(&nfs_version_lock);
134
135 nfs_version[nfs->rpc_ops->version] = NULL;
136 list_del(&nfs->list);
137
138 spin_unlock(&nfs_version_lock);
139 }
140 EXPORT_SYMBOL_GPL(unregister_nfs_version);
141
142
143
144
145
146
147
148 struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
149 {
150 struct nfs_client *clp;
151 int err = -ENOMEM;
152
153 if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
154 goto error_0;
155
156 clp->cl_minorversion = cl_init->minorversion;
157 clp->cl_nfs_mod = cl_init->nfs_mod;
158 if (!try_module_get(clp->cl_nfs_mod->owner))
159 goto error_dealloc;
160
161 clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
162
163 refcount_set(&clp->cl_count, 1);
164 clp->cl_cons_state = NFS_CS_INITING;
165
166 memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
167 clp->cl_addrlen = cl_init->addrlen;
168
169 if (cl_init->hostname) {
170 err = -ENOMEM;
171 clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
172 if (!clp->cl_hostname)
173 goto error_cleanup;
174 }
175
176 INIT_LIST_HEAD(&clp->cl_superblocks);
177 clp->cl_rpcclient = ERR_PTR(-EINVAL);
178
179 clp->cl_proto = cl_init->proto;
180 clp->cl_nconnect = cl_init->nconnect;
181 clp->cl_net = get_net(cl_init->net);
182
183 clp->cl_principal = "*";
184 nfs_fscache_get_client_cookie(clp);
185
186 return clp;
187
188 error_cleanup:
189 put_nfs_version(clp->cl_nfs_mod);
190 error_dealloc:
191 kfree(clp);
192 error_0:
193 return ERR_PTR(err);
194 }
195 EXPORT_SYMBOL_GPL(nfs_alloc_client);
196
197 #if IS_ENABLED(CONFIG_NFS_V4)
198 static void nfs_cleanup_cb_ident_idr(struct net *net)
199 {
200 struct nfs_net *nn = net_generic(net, nfs_net_id);
201
202 idr_destroy(&nn->cb_ident_idr);
203 }
204
205
206 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
207 {
208 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
209
210 if (clp->cl_cb_ident)
211 idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
212 }
213
214 static void pnfs_init_server(struct nfs_server *server)
215 {
216 rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
217 }
218
219 #else
220 static void nfs_cleanup_cb_ident_idr(struct net *net)
221 {
222 }
223
224 static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
225 {
226 }
227
228 static void pnfs_init_server(struct nfs_server *server)
229 {
230 }
231
232 #endif
233
234
235
236
237 void nfs_free_client(struct nfs_client *clp)
238 {
239 nfs_fscache_release_client_cookie(clp);
240
241
242 if (!IS_ERR(clp->cl_rpcclient))
243 rpc_shutdown_client(clp->cl_rpcclient);
244
245 put_net(clp->cl_net);
246 put_nfs_version(clp->cl_nfs_mod);
247 kfree(clp->cl_hostname);
248 kfree(clp->cl_acceptor);
249 kfree(clp);
250 }
251 EXPORT_SYMBOL_GPL(nfs_free_client);
252
253
254
255
256 void nfs_put_client(struct nfs_client *clp)
257 {
258 struct nfs_net *nn;
259
260 if (!clp)
261 return;
262
263 nn = net_generic(clp->cl_net, nfs_net_id);
264
265 if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
266 list_del(&clp->cl_share_link);
267 nfs_cb_idr_remove_locked(clp);
268 spin_unlock(&nn->nfs_client_lock);
269
270 WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
271
272 clp->rpc_ops->free_client(clp);
273 }
274 }
275 EXPORT_SYMBOL_GPL(nfs_put_client);
276
277
278
279
280
281 static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
282 {
283 struct nfs_client *clp;
284 const struct sockaddr *sap = data->addr;
285 struct nfs_net *nn = net_generic(data->net, nfs_net_id);
286 int error;
287
288 again:
289 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
290 const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
291
292 if (clp->cl_cons_state < 0)
293 continue;
294
295
296 if (clp->cl_cons_state > NFS_CS_READY) {
297 refcount_inc(&clp->cl_count);
298 spin_unlock(&nn->nfs_client_lock);
299 error = nfs_wait_client_init_complete(clp);
300 nfs_put_client(clp);
301 spin_lock(&nn->nfs_client_lock);
302 if (error < 0)
303 return ERR_PTR(error);
304 goto again;
305 }
306
307
308 if (clp->rpc_ops != data->nfs_mod->rpc_ops)
309 continue;
310
311 if (clp->cl_proto != data->proto)
312 continue;
313
314 if (clp->cl_minorversion != data->minorversion)
315 continue;
316
317 if (!rpc_cmp_addr_port(sap, clap))
318
319 if (IS_ERR(clp->cl_rpcclient) ||
320 !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
321 sap))
322 continue;
323
324 refcount_inc(&clp->cl_count);
325 return clp;
326 }
327 return NULL;
328 }
329
330
331
332
333
334
335 bool nfs_client_init_is_complete(const struct nfs_client *clp)
336 {
337 return clp->cl_cons_state <= NFS_CS_READY;
338 }
339 EXPORT_SYMBOL_GPL(nfs_client_init_is_complete);
340
341
342
343
344
345
346
347 int nfs_client_init_status(const struct nfs_client *clp)
348 {
349
350 if (clp->cl_cons_state > NFS_CS_READY) {
351 WARN_ON_ONCE(1);
352 return -EINVAL;
353 }
354 return clp->cl_cons_state;
355 }
356 EXPORT_SYMBOL_GPL(nfs_client_init_status);
357
358 int nfs_wait_client_init_complete(const struct nfs_client *clp)
359 {
360 return wait_event_killable(nfs_client_active_wq,
361 nfs_client_init_is_complete(clp));
362 }
363 EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
364
365
366
367
368 static struct nfs_client *
369 nfs_found_client(const struct nfs_client_initdata *cl_init,
370 struct nfs_client *clp)
371 {
372 int error;
373
374 error = nfs_wait_client_init_complete(clp);
375 if (error < 0) {
376 nfs_put_client(clp);
377 return ERR_PTR(-ERESTARTSYS);
378 }
379
380 if (clp->cl_cons_state < NFS_CS_READY) {
381 error = clp->cl_cons_state;
382 nfs_put_client(clp);
383 return ERR_PTR(error);
384 }
385
386 smp_rmb();
387 return clp;
388 }
389
390
391
392
393
394 struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
395 {
396 struct nfs_client *clp, *new = NULL;
397 struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
398 const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
399
400 if (cl_init->hostname == NULL) {
401 WARN_ON(1);
402 return NULL;
403 }
404
405
406 do {
407 spin_lock(&nn->nfs_client_lock);
408
409 clp = nfs_match_client(cl_init);
410 if (clp) {
411 spin_unlock(&nn->nfs_client_lock);
412 if (new)
413 new->rpc_ops->free_client(new);
414 if (IS_ERR(clp))
415 return clp;
416 return nfs_found_client(cl_init, clp);
417 }
418 if (new) {
419 list_add_tail(&new->cl_share_link,
420 &nn->nfs_client_list);
421 spin_unlock(&nn->nfs_client_lock);
422 new->cl_flags = cl_init->init_flags;
423 return rpc_ops->init_client(new, cl_init);
424 }
425
426 spin_unlock(&nn->nfs_client_lock);
427
428 new = rpc_ops->alloc_client(cl_init);
429 } while (!IS_ERR(new));
430
431 return new;
432 }
433 EXPORT_SYMBOL_GPL(nfs_get_client);
434
435
436
437
438 void nfs_mark_client_ready(struct nfs_client *clp, int state)
439 {
440 smp_wmb();
441 clp->cl_cons_state = state;
442 wake_up_all(&nfs_client_active_wq);
443 }
444 EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
445
446
447
448
449 void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
450 int timeo, int retrans)
451 {
452 to->to_initval = timeo * HZ / 10;
453 to->to_retries = retrans;
454
455 switch (proto) {
456 case XPRT_TRANSPORT_TCP:
457 case XPRT_TRANSPORT_RDMA:
458 if (retrans == NFS_UNSPEC_RETRANS)
459 to->to_retries = NFS_DEF_TCP_RETRANS;
460 if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
461 to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
462 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
463 to->to_initval = NFS_MAX_TCP_TIMEOUT;
464 to->to_increment = to->to_initval;
465 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
466 if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
467 to->to_maxval = NFS_MAX_TCP_TIMEOUT;
468 if (to->to_maxval < to->to_initval)
469 to->to_maxval = to->to_initval;
470 to->to_exponential = 0;
471 break;
472 case XPRT_TRANSPORT_UDP:
473 if (retrans == NFS_UNSPEC_RETRANS)
474 to->to_retries = NFS_DEF_UDP_RETRANS;
475 if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
476 to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
477 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
478 to->to_initval = NFS_MAX_UDP_TIMEOUT;
479 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
480 to->to_exponential = 1;
481 break;
482 default:
483 BUG();
484 }
485 }
486 EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
487
488
489
490
491 int nfs_create_rpc_client(struct nfs_client *clp,
492 const struct nfs_client_initdata *cl_init,
493 rpc_authflavor_t flavor)
494 {
495 struct rpc_clnt *clnt = NULL;
496 struct rpc_create_args args = {
497 .net = clp->cl_net,
498 .protocol = clp->cl_proto,
499 .nconnect = clp->cl_nconnect,
500 .address = (struct sockaddr *)&clp->cl_addr,
501 .addrsize = clp->cl_addrlen,
502 .timeout = cl_init->timeparms,
503 .servername = clp->cl_hostname,
504 .nodename = cl_init->nodename,
505 .program = &nfs_program,
506 .version = clp->rpc_ops->version,
507 .authflavor = flavor,
508 .cred = cl_init->cred,
509 };
510
511 if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
512 args.flags |= RPC_CLNT_CREATE_DISCRTRY;
513 if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
514 args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
515 if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
516 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
517 if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
518 args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
519
520 if (!IS_ERR(clp->cl_rpcclient))
521 return 0;
522
523 clnt = rpc_create(&args);
524 if (IS_ERR(clnt)) {
525 dprintk("%s: cannot create RPC client. Error = %ld\n",
526 __func__, PTR_ERR(clnt));
527 return PTR_ERR(clnt);
528 }
529
530 clnt->cl_principal = clp->cl_principal;
531 clp->cl_rpcclient = clnt;
532 return 0;
533 }
534 EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
535
536
537
538
539 static void nfs_destroy_server(struct nfs_server *server)
540 {
541 if (server->nlm_host)
542 nlmclnt_done(server->nlm_host);
543 }
544
545
546
547
548 static int nfs_start_lockd(struct nfs_server *server)
549 {
550 struct nlm_host *host;
551 struct nfs_client *clp = server->nfs_client;
552 struct nlmclnt_initdata nlm_init = {
553 .hostname = clp->cl_hostname,
554 .address = (struct sockaddr *)&clp->cl_addr,
555 .addrlen = clp->cl_addrlen,
556 .nfs_version = clp->rpc_ops->version,
557 .noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
558 1 : 0,
559 .net = clp->cl_net,
560 .nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
561 .cred = current_cred(),
562 };
563
564 if (nlm_init.nfs_version > 3)
565 return 0;
566 if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
567 (server->flags & NFS_MOUNT_LOCAL_FCNTL))
568 return 0;
569
570 switch (clp->cl_proto) {
571 default:
572 nlm_init.protocol = IPPROTO_TCP;
573 break;
574 case XPRT_TRANSPORT_UDP:
575 nlm_init.protocol = IPPROTO_UDP;
576 }
577
578 host = nlmclnt_init(&nlm_init);
579 if (IS_ERR(host))
580 return PTR_ERR(host);
581
582 server->nlm_host = host;
583 server->destroy = nfs_destroy_server;
584 return 0;
585 }
586
587
588
589
590 int nfs_init_server_rpcclient(struct nfs_server *server,
591 const struct rpc_timeout *timeo,
592 rpc_authflavor_t pseudoflavour)
593 {
594 struct nfs_client *clp = server->nfs_client;
595
596 server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
597 pseudoflavour);
598 if (IS_ERR(server->client)) {
599 dprintk("%s: couldn't create rpc_client!\n", __func__);
600 return PTR_ERR(server->client);
601 }
602
603 memcpy(&server->client->cl_timeout_default,
604 timeo,
605 sizeof(server->client->cl_timeout_default));
606 server->client->cl_timeout = &server->client->cl_timeout_default;
607 server->client->cl_softrtry = 0;
608 if (server->flags & NFS_MOUNT_SOFTERR)
609 server->client->cl_softerr = 1;
610 if (server->flags & NFS_MOUNT_SOFT)
611 server->client->cl_softrtry = 1;
612
613 return 0;
614 }
615 EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
616
617
618
619
620
621
622
623
624
625 struct nfs_client *nfs_init_client(struct nfs_client *clp,
626 const struct nfs_client_initdata *cl_init)
627 {
628 int error;
629
630
631 if (clp->cl_cons_state == NFS_CS_READY)
632 return clp;
633
634
635
636
637
638 error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX);
639 nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error);
640 if (error < 0) {
641 nfs_put_client(clp);
642 clp = ERR_PTR(error);
643 }
644 return clp;
645 }
646 EXPORT_SYMBOL_GPL(nfs_init_client);
647
648
649
650
651 static int nfs_init_server(struct nfs_server *server,
652 const struct nfs_parsed_mount_data *data,
653 struct nfs_subversion *nfs_mod)
654 {
655 struct rpc_timeout timeparms;
656 struct nfs_client_initdata cl_init = {
657 .hostname = data->nfs_server.hostname,
658 .addr = (const struct sockaddr *)&data->nfs_server.address,
659 .addrlen = data->nfs_server.addrlen,
660 .nfs_mod = nfs_mod,
661 .proto = data->nfs_server.protocol,
662 .net = data->net,
663 .timeparms = &timeparms,
664 .cred = server->cred,
665 .nconnect = data->nfs_server.nconnect,
666 };
667 struct nfs_client *clp;
668 int error;
669
670 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
671 data->timeo, data->retrans);
672 if (data->flags & NFS_MOUNT_NORESVPORT)
673 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
674
675
676 clp = nfs_get_client(&cl_init);
677 if (IS_ERR(clp))
678 return PTR_ERR(clp);
679
680 server->nfs_client = clp;
681
682
683 server->flags = data->flags;
684 server->options = data->options;
685 server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
686 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
687 NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
688
689 if (data->rsize)
690 server->rsize = nfs_block_size(data->rsize, NULL);
691 if (data->wsize)
692 server->wsize = nfs_block_size(data->wsize, NULL);
693
694 server->acregmin = data->acregmin * HZ;
695 server->acregmax = data->acregmax * HZ;
696 server->acdirmin = data->acdirmin * HZ;
697 server->acdirmax = data->acdirmax * HZ;
698
699
700 error = nfs_start_lockd(server);
701 if (error < 0)
702 goto error;
703
704 server->port = data->nfs_server.port;
705 server->auth_info = data->auth_info;
706
707 error = nfs_init_server_rpcclient(server, &timeparms,
708 data->selected_flavor);
709 if (error < 0)
710 goto error;
711
712
713 if (data->mount_server.addrlen) {
714 memcpy(&server->mountd_address, &data->mount_server.address,
715 data->mount_server.addrlen);
716 server->mountd_addrlen = data->mount_server.addrlen;
717 }
718 server->mountd_version = data->mount_server.version;
719 server->mountd_port = data->mount_server.port;
720 server->mountd_protocol = data->mount_server.protocol;
721
722 server->namelen = data->namlen;
723 return 0;
724
725 error:
726 server->nfs_client = NULL;
727 nfs_put_client(clp);
728 return error;
729 }
730
731
732
733
734 static void nfs_server_set_fsinfo(struct nfs_server *server,
735 struct nfs_fsinfo *fsinfo)
736 {
737 unsigned long max_rpc_payload;
738
739
740 if (server->rsize == 0)
741 server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
742 if (server->wsize == 0)
743 server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
744
745 if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
746 server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
747 if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
748 server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
749
750 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
751 if (server->rsize > max_rpc_payload)
752 server->rsize = max_rpc_payload;
753 if (server->rsize > NFS_MAX_FILE_IO_SIZE)
754 server->rsize = NFS_MAX_FILE_IO_SIZE;
755 server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
756
757 if (server->wsize > max_rpc_payload)
758 server->wsize = max_rpc_payload;
759 if (server->wsize > NFS_MAX_FILE_IO_SIZE)
760 server->wsize = NFS_MAX_FILE_IO_SIZE;
761 server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
762
763 server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
764
765 server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
766 if (server->dtsize > PAGE_SIZE * NFS_MAX_READDIR_PAGES)
767 server->dtsize = PAGE_SIZE * NFS_MAX_READDIR_PAGES;
768 if (server->dtsize > server->rsize)
769 server->dtsize = server->rsize;
770
771 if (server->flags & NFS_MOUNT_NOAC) {
772 server->acregmin = server->acregmax = 0;
773 server->acdirmin = server->acdirmax = 0;
774 }
775
776 server->maxfilesize = fsinfo->maxfilesize;
777
778 server->time_delta = fsinfo->time_delta;
779
780 server->clone_blksize = fsinfo->clone_blksize;
781
782 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
783 }
784
785
786
787
788 int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
789 {
790 struct nfs_fsinfo fsinfo;
791 struct nfs_client *clp = server->nfs_client;
792 int error;
793
794 if (clp->rpc_ops->set_capabilities != NULL) {
795 error = clp->rpc_ops->set_capabilities(server, mntfh);
796 if (error < 0)
797 return error;
798 }
799
800 fsinfo.fattr = fattr;
801 fsinfo.nlayouttypes = 0;
802 memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype));
803 error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
804 if (error < 0)
805 return error;
806
807 nfs_server_set_fsinfo(server, &fsinfo);
808
809
810 if (server->namelen == 0) {
811 struct nfs_pathconf pathinfo;
812
813 pathinfo.fattr = fattr;
814 nfs_fattr_init(fattr);
815
816 if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
817 server->namelen = pathinfo.max_namelen;
818 }
819
820 return 0;
821 }
822 EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
823
824
825
826
827 void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
828 {
829 target->flags = source->flags;
830 target->rsize = source->rsize;
831 target->wsize = source->wsize;
832 target->acregmin = source->acregmin;
833 target->acregmax = source->acregmax;
834 target->acdirmin = source->acdirmin;
835 target->acdirmax = source->acdirmax;
836 target->caps = source->caps;
837 target->options = source->options;
838 target->auth_info = source->auth_info;
839 target->port = source->port;
840 }
841 EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
842
843 void nfs_server_insert_lists(struct nfs_server *server)
844 {
845 struct nfs_client *clp = server->nfs_client;
846 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
847
848 spin_lock(&nn->nfs_client_lock);
849 list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
850 list_add_tail(&server->master_link, &nn->nfs_volume_list);
851 clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
852 spin_unlock(&nn->nfs_client_lock);
853
854 }
855 EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
856
857 void nfs_server_remove_lists(struct nfs_server *server)
858 {
859 struct nfs_client *clp = server->nfs_client;
860 struct nfs_net *nn;
861
862 if (clp == NULL)
863 return;
864 nn = net_generic(clp->cl_net, nfs_net_id);
865 spin_lock(&nn->nfs_client_lock);
866 list_del_rcu(&server->client_link);
867 if (list_empty(&clp->cl_superblocks))
868 set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
869 list_del(&server->master_link);
870 spin_unlock(&nn->nfs_client_lock);
871
872 synchronize_rcu();
873 }
874 EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
875
876
877
878
879 struct nfs_server *nfs_alloc_server(void)
880 {
881 struct nfs_server *server;
882
883 server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
884 if (!server)
885 return NULL;
886
887 server->client = server->client_acl = ERR_PTR(-EINVAL);
888
889
890 INIT_LIST_HEAD(&server->client_link);
891 INIT_LIST_HEAD(&server->master_link);
892 INIT_LIST_HEAD(&server->delegations);
893 INIT_LIST_HEAD(&server->layouts);
894 INIT_LIST_HEAD(&server->state_owners_lru);
895 INIT_LIST_HEAD(&server->ss_copies);
896
897 atomic_set(&server->active, 0);
898
899 server->io_stats = nfs_alloc_iostats();
900 if (!server->io_stats) {
901 kfree(server);
902 return NULL;
903 }
904
905 ida_init(&server->openowner_id);
906 ida_init(&server->lockowner_id);
907 pnfs_init_server(server);
908 rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC");
909
910 return server;
911 }
912 EXPORT_SYMBOL_GPL(nfs_alloc_server);
913
914
915
916
917 void nfs_free_server(struct nfs_server *server)
918 {
919 nfs_server_remove_lists(server);
920
921 if (server->destroy != NULL)
922 server->destroy(server);
923
924 if (!IS_ERR(server->client_acl))
925 rpc_shutdown_client(server->client_acl);
926 if (!IS_ERR(server->client))
927 rpc_shutdown_client(server->client);
928
929 nfs_put_client(server->nfs_client);
930
931 ida_destroy(&server->lockowner_id);
932 ida_destroy(&server->openowner_id);
933 nfs_free_iostats(server->io_stats);
934 put_cred(server->cred);
935 kfree(server);
936 nfs_release_automount_timer();
937 }
938 EXPORT_SYMBOL_GPL(nfs_free_server);
939
940
941
942
943
944 struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
945 struct nfs_subversion *nfs_mod)
946 {
947 struct nfs_server *server;
948 struct nfs_fattr *fattr;
949 int error;
950
951 server = nfs_alloc_server();
952 if (!server)
953 return ERR_PTR(-ENOMEM);
954
955 server->cred = get_cred(current_cred());
956
957 error = -ENOMEM;
958 fattr = nfs_alloc_fattr();
959 if (fattr == NULL)
960 goto error;
961
962
963 error = nfs_init_server(server, mount_info->parsed, nfs_mod);
964 if (error < 0)
965 goto error;
966
967
968 error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr);
969 if (error < 0)
970 goto error;
971 if (server->nfs_client->rpc_ops->version == 3) {
972 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
973 server->namelen = NFS3_MAXNAMLEN;
974 if (!(mount_info->parsed->flags & NFS_MOUNT_NORDIRPLUS))
975 server->caps |= NFS_CAP_READDIRPLUS;
976 } else {
977 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
978 server->namelen = NFS2_MAXNAMLEN;
979 }
980
981 if (!(fattr->valid & NFS_ATTR_FATTR)) {
982 error = nfs_mod->rpc_ops->getattr(server, mount_info->mntfh,
983 fattr, NULL, NULL);
984 if (error < 0) {
985 dprintk("nfs_create_server: getattr error = %d\n", -error);
986 goto error;
987 }
988 }
989 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
990
991 dprintk("Server FSID: %llx:%llx\n",
992 (unsigned long long) server->fsid.major,
993 (unsigned long long) server->fsid.minor);
994
995 nfs_server_insert_lists(server);
996 server->mount_time = jiffies;
997 nfs_free_fattr(fattr);
998 return server;
999
1000 error:
1001 nfs_free_fattr(fattr);
1002 nfs_free_server(server);
1003 return ERR_PTR(error);
1004 }
1005 EXPORT_SYMBOL_GPL(nfs_create_server);
1006
1007
1008
1009
1010 struct nfs_server *nfs_clone_server(struct nfs_server *source,
1011 struct nfs_fh *fh,
1012 struct nfs_fattr *fattr,
1013 rpc_authflavor_t flavor)
1014 {
1015 struct nfs_server *server;
1016 struct nfs_fattr *fattr_fsinfo;
1017 int error;
1018
1019 server = nfs_alloc_server();
1020 if (!server)
1021 return ERR_PTR(-ENOMEM);
1022
1023 server->cred = get_cred(source->cred);
1024
1025 error = -ENOMEM;
1026 fattr_fsinfo = nfs_alloc_fattr();
1027 if (fattr_fsinfo == NULL)
1028 goto out_free_server;
1029
1030
1031 server->nfs_client = source->nfs_client;
1032 server->destroy = source->destroy;
1033 refcount_inc(&server->nfs_client->cl_count);
1034 nfs_server_copy_userdata(server, source);
1035
1036 server->fsid = fattr->fsid;
1037
1038 error = nfs_init_server_rpcclient(server,
1039 source->client->cl_timeout,
1040 flavor);
1041 if (error < 0)
1042 goto out_free_server;
1043
1044
1045 error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
1046 if (error < 0)
1047 goto out_free_server;
1048
1049 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
1050 server->namelen = NFS4_MAXNAMLEN;
1051
1052 error = nfs_start_lockd(server);
1053 if (error < 0)
1054 goto out_free_server;
1055
1056 nfs_server_insert_lists(server);
1057 server->mount_time = jiffies;
1058
1059 nfs_free_fattr(fattr_fsinfo);
1060 return server;
1061
1062 out_free_server:
1063 nfs_free_fattr(fattr_fsinfo);
1064 nfs_free_server(server);
1065 return ERR_PTR(error);
1066 }
1067 EXPORT_SYMBOL_GPL(nfs_clone_server);
1068
1069 void nfs_clients_init(struct net *net)
1070 {
1071 struct nfs_net *nn = net_generic(net, nfs_net_id);
1072
1073 INIT_LIST_HEAD(&nn->nfs_client_list);
1074 INIT_LIST_HEAD(&nn->nfs_volume_list);
1075 #if IS_ENABLED(CONFIG_NFS_V4)
1076 idr_init(&nn->cb_ident_idr);
1077 #endif
1078 spin_lock_init(&nn->nfs_client_lock);
1079 nn->boot_time = ktime_get_real();
1080
1081 nfs_netns_sysfs_setup(nn, net);
1082 }
1083
1084 void nfs_clients_exit(struct net *net)
1085 {
1086 struct nfs_net *nn = net_generic(net, nfs_net_id);
1087
1088 nfs_netns_sysfs_destroy(nn);
1089 nfs_cleanup_cb_ident_idr(net);
1090 WARN_ON_ONCE(!list_empty(&nn->nfs_client_list));
1091 WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list));
1092 }
1093
1094 #ifdef CONFIG_PROC_FS
1095 static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
1096 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
1097 static void nfs_server_list_stop(struct seq_file *p, void *v);
1098 static int nfs_server_list_show(struct seq_file *m, void *v);
1099
1100 static const struct seq_operations nfs_server_list_ops = {
1101 .start = nfs_server_list_start,
1102 .next = nfs_server_list_next,
1103 .stop = nfs_server_list_stop,
1104 .show = nfs_server_list_show,
1105 };
1106
1107 static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
1108 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
1109 static void nfs_volume_list_stop(struct seq_file *p, void *v);
1110 static int nfs_volume_list_show(struct seq_file *m, void *v);
1111
1112 static const struct seq_operations nfs_volume_list_ops = {
1113 .start = nfs_volume_list_start,
1114 .next = nfs_volume_list_next,
1115 .stop = nfs_volume_list_stop,
1116 .show = nfs_volume_list_show,
1117 };
1118
1119
1120
1121
1122 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
1123 __acquires(&nn->nfs_client_lock)
1124 {
1125 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
1126
1127
1128 spin_lock(&nn->nfs_client_lock);
1129 return seq_list_start_head(&nn->nfs_client_list, *_pos);
1130 }
1131
1132
1133
1134
1135 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
1136 {
1137 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1138
1139 return seq_list_next(v, &nn->nfs_client_list, pos);
1140 }
1141
1142
1143
1144
1145 static void nfs_server_list_stop(struct seq_file *p, void *v)
1146 __releases(&nn->nfs_client_lock)
1147 {
1148 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1149
1150 spin_unlock(&nn->nfs_client_lock);
1151 }
1152
1153
1154
1155
1156 static int nfs_server_list_show(struct seq_file *m, void *v)
1157 {
1158 struct nfs_client *clp;
1159 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
1160
1161
1162 if (v == &nn->nfs_client_list) {
1163 seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
1164 return 0;
1165 }
1166
1167
1168 clp = list_entry(v, struct nfs_client, cl_share_link);
1169
1170
1171 if (clp->cl_cons_state != NFS_CS_READY)
1172 return 0;
1173
1174 rcu_read_lock();
1175 seq_printf(m, "v%u %s %s %3d %s\n",
1176 clp->rpc_ops->version,
1177 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1178 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1179 refcount_read(&clp->cl_count),
1180 clp->cl_hostname);
1181 rcu_read_unlock();
1182
1183 return 0;
1184 }
1185
1186
1187
1188
1189 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
1190 __acquires(&nn->nfs_client_lock)
1191 {
1192 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
1193
1194
1195 spin_lock(&nn->nfs_client_lock);
1196 return seq_list_start_head(&nn->nfs_volume_list, *_pos);
1197 }
1198
1199
1200
1201
1202 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
1203 {
1204 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1205
1206 return seq_list_next(v, &nn->nfs_volume_list, pos);
1207 }
1208
1209
1210
1211
1212 static void nfs_volume_list_stop(struct seq_file *p, void *v)
1213 __releases(&nn->nfs_client_lock)
1214 {
1215 struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
1216
1217 spin_unlock(&nn->nfs_client_lock);
1218 }
1219
1220
1221
1222
1223 static int nfs_volume_list_show(struct seq_file *m, void *v)
1224 {
1225 struct nfs_server *server;
1226 struct nfs_client *clp;
1227 char dev[13];
1228 char fsid[34];
1229 struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
1230
1231
1232 if (v == &nn->nfs_volume_list) {
1233 seq_puts(m, "NV SERVER PORT DEV FSID"
1234 " FSC\n");
1235 return 0;
1236 }
1237
1238 server = list_entry(v, struct nfs_server, master_link);
1239 clp = server->nfs_client;
1240
1241 snprintf(dev, sizeof(dev), "%u:%u",
1242 MAJOR(server->s_dev), MINOR(server->s_dev));
1243
1244 snprintf(fsid, sizeof(fsid), "%llx:%llx",
1245 (unsigned long long) server->fsid.major,
1246 (unsigned long long) server->fsid.minor);
1247
1248 rcu_read_lock();
1249 seq_printf(m, "v%u %s %s %-12s %-33s %s\n",
1250 clp->rpc_ops->version,
1251 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
1252 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
1253 dev,
1254 fsid,
1255 nfs_server_fscache_state(server));
1256 rcu_read_unlock();
1257
1258 return 0;
1259 }
1260
1261 int nfs_fs_proc_net_init(struct net *net)
1262 {
1263 struct nfs_net *nn = net_generic(net, nfs_net_id);
1264 struct proc_dir_entry *p;
1265
1266 nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net);
1267 if (!nn->proc_nfsfs)
1268 goto error_0;
1269
1270
1271 p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs,
1272 &nfs_server_list_ops, sizeof(struct seq_net_private));
1273 if (!p)
1274 goto error_1;
1275
1276
1277 p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs,
1278 &nfs_volume_list_ops, sizeof(struct seq_net_private));
1279 if (!p)
1280 goto error_1;
1281 return 0;
1282
1283 error_1:
1284 remove_proc_subtree("nfsfs", net->proc_net);
1285 error_0:
1286 return -ENOMEM;
1287 }
1288
1289 void nfs_fs_proc_net_exit(struct net *net)
1290 {
1291 remove_proc_subtree("nfsfs", net->proc_net);
1292 }
1293
1294
1295
1296
1297 int __init nfs_fs_proc_init(void)
1298 {
1299 if (!proc_mkdir("fs/nfsfs", NULL))
1300 goto error_0;
1301
1302
1303 if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers"))
1304 goto error_1;
1305
1306
1307 if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes"))
1308 goto error_1;
1309
1310 return 0;
1311 error_1:
1312 remove_proc_subtree("fs/nfsfs", NULL);
1313 error_0:
1314 return -ENOMEM;
1315 }
1316
1317
1318
1319
1320 void nfs_fs_proc_exit(void)
1321 {
1322 remove_proc_subtree("fs/nfsfs", NULL);
1323 }
1324
1325 #endif