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