1
2
3
4
5#include <linux/module.h>
6#include <linux/nfs_fs.h>
7#include <linux/nfs_idmap.h>
8#include <linux/nfs_mount.h>
9#include <linux/sunrpc/addr.h>
10#include <linux/sunrpc/auth.h>
11#include <linux/sunrpc/xprt.h>
12#include <linux/sunrpc/bc_xprt.h>
13#include "internal.h"
14#include "callback.h"
15#include "delegation.h"
16#include "nfs4session.h"
17#include "pnfs.h"
18#include "netns.h"
19
20#define NFSDBG_FACILITY NFSDBG_CLIENT
21
22
23
24
25
26static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
27{
28 int ret = 0;
29 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
30
31 if (clp->rpc_ops->version != 4 || minorversion != 0)
32 return ret;
33 idr_preload(GFP_KERNEL);
34 spin_lock(&nn->nfs_client_lock);
35 ret = idr_alloc(&nn->cb_ident_idr, clp, 0, 0, GFP_NOWAIT);
36 if (ret >= 0)
37 clp->cl_cb_ident = ret;
38 spin_unlock(&nn->nfs_client_lock);
39 idr_preload_end();
40 return ret < 0 ? ret : 0;
41}
42
43#ifdef CONFIG_NFS_V4_1
44static void nfs4_shutdown_session(struct nfs_client *clp)
45{
46 if (nfs4_has_session(clp)) {
47 nfs4_destroy_session(clp->cl_session);
48 nfs4_destroy_clientid(clp);
49 }
50
51}
52#else
53static void nfs4_shutdown_session(struct nfs_client *clp)
54{
55}
56#endif
57
58struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
59{
60 int err;
61 struct nfs_client *clp = nfs_alloc_client(cl_init);
62 if (IS_ERR(clp))
63 return clp;
64
65 err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
66 if (err)
67 goto error;
68
69 if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) {
70 err = -EINVAL;
71 goto error;
72 }
73
74 spin_lock_init(&clp->cl_lock);
75 INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
76 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
77 clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
78 clp->cl_minorversion = cl_init->minorversion;
79 clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
80 return clp;
81
82error:
83 nfs_free_client(clp);
84 return ERR_PTR(err);
85}
86
87
88
89
90static void nfs4_destroy_callback(struct nfs_client *clp)
91{
92 if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
93 nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net);
94}
95
96static void nfs4_shutdown_client(struct nfs_client *clp)
97{
98 if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
99 nfs4_kill_renewd(clp);
100 nfs4_shutdown_session(clp);
101 nfs4_destroy_callback(clp);
102 if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
103 nfs_idmap_delete(clp);
104
105 rpc_destroy_wait_queue(&clp->cl_rpcwaitq);
106 kfree(clp->cl_serverowner);
107 kfree(clp->cl_serverscope);
108 kfree(clp->cl_implid);
109}
110
111void nfs4_free_client(struct nfs_client *clp)
112{
113 nfs4_shutdown_client(clp);
114 nfs_free_client(clp);
115}
116
117
118
119
120static int nfs4_init_callback(struct nfs_client *clp)
121{
122 int error;
123
124 if (clp->rpc_ops->version == 4) {
125 struct rpc_xprt *xprt;
126
127 xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt);
128
129 if (nfs4_has_session(clp)) {
130 error = xprt_setup_backchannel(xprt,
131 NFS41_BC_MIN_CALLBACKS);
132 if (error < 0)
133 return error;
134 }
135
136 error = nfs_callback_up(clp->cl_mvops->minor_version, xprt);
137 if (error < 0) {
138 dprintk("%s: failed to start callback. Error = %d\n",
139 __func__, error);
140 return error;
141 }
142 __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
143 }
144 return 0;
145}
146
147
148
149
150static int nfs4_init_client_minor_version(struct nfs_client *clp)
151{
152#if defined(CONFIG_NFS_V4_1)
153 if (clp->cl_mvops->minor_version) {
154 struct nfs4_session *session = NULL;
155
156
157
158
159
160 session = nfs4_alloc_session(clp);
161 if (!session)
162 return -ENOMEM;
163
164 clp->cl_session = session;
165
166
167
168
169
170
171 nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING);
172 }
173#endif
174
175 return nfs4_init_callback(clp);
176}
177
178
179
180
181
182
183
184
185
186
187
188struct nfs_client *nfs4_init_client(struct nfs_client *clp,
189 const struct rpc_timeout *timeparms,
190 const char *ip_addr,
191 rpc_authflavor_t authflavour)
192{
193 char buf[INET6_ADDRSTRLEN + 1];
194 struct nfs_client *old;
195 int error;
196
197 if (clp->cl_cons_state == NFS_CS_READY) {
198
199 dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp);
200 return clp;
201 }
202
203
204 clp->rpc_ops = &nfs_v4_clientops;
205
206 if (clp->cl_minorversion != 0)
207 __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags);
208 __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags);
209 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_GSS_KRB5I);
210 if (error == -EINVAL)
211 error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX);
212 if (error < 0)
213 goto error;
214
215
216 if (ip_addr == NULL) {
217 struct sockaddr_storage cb_addr;
218 struct sockaddr *sap = (struct sockaddr *)&cb_addr;
219
220 error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
221 if (error < 0)
222 goto error;
223 error = rpc_ntop(sap, buf, sizeof(buf));
224 if (error < 0)
225 goto error;
226 ip_addr = (const char *)buf;
227 }
228 strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
229
230 error = nfs_idmap_new(clp);
231 if (error < 0) {
232 dprintk("%s: failed to create idmapper. Error = %d\n",
233 __func__, error);
234 goto error;
235 }
236 __set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
237
238 error = nfs4_init_client_minor_version(clp);
239 if (error < 0)
240 goto error;
241
242 if (!nfs4_has_session(clp))
243 nfs_mark_client_ready(clp, NFS_CS_READY);
244
245 error = nfs4_discover_server_trunking(clp, &old);
246 if (error < 0)
247 goto error;
248 nfs_put_client(clp);
249 if (clp != old) {
250 clp->cl_preserve_clid = true;
251 clp = old;
252 }
253
254 return clp;
255
256error:
257 nfs_mark_client_ready(clp, error);
258 nfs_put_client(clp);
259 dprintk("<-- nfs4_init_client() = xerror %d\n", error);
260 return ERR_PTR(error);
261}
262
263
264
265
266
267
268
269
270
271static void nfs4_swap_callback_idents(struct nfs_client *keep,
272 struct nfs_client *drop)
273{
274 struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id);
275 unsigned int save = keep->cl_cb_ident;
276
277 if (keep->cl_cb_ident == drop->cl_cb_ident)
278 return;
279
280 dprintk("%s: keeping callback ident %u and dropping ident %u\n",
281 __func__, keep->cl_cb_ident, drop->cl_cb_ident);
282
283 spin_lock(&nn->nfs_client_lock);
284
285 idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident);
286 keep->cl_cb_ident = drop->cl_cb_ident;
287
288 idr_replace(&nn->cb_ident_idr, drop, save);
289 drop->cl_cb_ident = save;
290
291 spin_unlock(&nn->nfs_client_lock);
292}
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307int nfs40_walk_client_list(struct nfs_client *new,
308 struct nfs_client **result,
309 struct rpc_cred *cred)
310{
311 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
312 struct nfs_client *pos, *prev = NULL;
313 struct nfs4_setclientid_res clid = {
314 .clientid = new->cl_clientid,
315 .confirm = new->cl_confirm,
316 };
317 int status = -NFS4ERR_STALE_CLIENTID;
318
319 spin_lock(&nn->nfs_client_lock);
320 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
321
322
323 if (pos->cl_cons_state > NFS_CS_READY) {
324 atomic_inc(&pos->cl_count);
325 spin_unlock(&nn->nfs_client_lock);
326
327 if (prev)
328 nfs_put_client(prev);
329 prev = pos;
330
331 status = nfs_wait_client_init_complete(pos);
332 spin_lock(&nn->nfs_client_lock);
333 if (status < 0)
334 continue;
335 }
336 if (pos->cl_cons_state != NFS_CS_READY)
337 continue;
338
339 if (pos->rpc_ops != new->rpc_ops)
340 continue;
341
342 if (pos->cl_proto != new->cl_proto)
343 continue;
344
345 if (pos->cl_minorversion != new->cl_minorversion)
346 continue;
347
348 if (pos->cl_clientid != new->cl_clientid)
349 continue;
350
351 atomic_inc(&pos->cl_count);
352 spin_unlock(&nn->nfs_client_lock);
353
354 if (prev)
355 nfs_put_client(prev);
356 prev = pos;
357
358 status = nfs4_proc_setclientid_confirm(pos, &clid, cred);
359 switch (status) {
360 case -NFS4ERR_STALE_CLIENTID:
361 break;
362 case 0:
363 nfs4_swap_callback_idents(pos, new);
364
365 prev = NULL;
366 *result = pos;
367 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
368 __func__, pos, atomic_read(&pos->cl_count));
369 default:
370 goto out;
371 }
372
373 spin_lock(&nn->nfs_client_lock);
374 }
375 spin_unlock(&nn->nfs_client_lock);
376
377
378out:
379 if (prev)
380 nfs_put_client(prev);
381 dprintk("NFS: <-- %s status = %d\n", __func__, status);
382 return status;
383}
384
385#ifdef CONFIG_NFS_V4_1
386
387
388
389static bool nfs4_match_clientids(struct nfs_client *a, struct nfs_client *b)
390{
391 if (a->cl_clientid != b->cl_clientid) {
392 dprintk("NFS: --> %s client ID %llx does not match %llx\n",
393 __func__, a->cl_clientid, b->cl_clientid);
394 return false;
395 }
396 dprintk("NFS: --> %s client ID %llx matches %llx\n",
397 __func__, a->cl_clientid, b->cl_clientid);
398 return true;
399}
400
401
402
403
404static bool
405nfs4_match_serverowners(struct nfs_client *a, struct nfs_client *b)
406{
407 struct nfs41_server_owner *o1 = a->cl_serverowner;
408 struct nfs41_server_owner *o2 = b->cl_serverowner;
409
410 if (o1->minor_id != o2->minor_id) {
411 dprintk("NFS: --> %s server owner minor IDs do not match\n",
412 __func__);
413 return false;
414 }
415
416 if (o1->major_id_sz != o2->major_id_sz)
417 goto out_major_mismatch;
418 if (memcmp(o1->major_id, o2->major_id, o1->major_id_sz) != 0)
419 goto out_major_mismatch;
420
421 dprintk("NFS: --> %s server owners match\n", __func__);
422 return true;
423
424out_major_mismatch:
425 dprintk("NFS: --> %s server owner major IDs do not match\n",
426 __func__);
427 return false;
428}
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443int nfs41_walk_client_list(struct nfs_client *new,
444 struct nfs_client **result,
445 struct rpc_cred *cred)
446{
447 struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id);
448 struct nfs_client *pos, *prev = NULL;
449 int status = -NFS4ERR_STALE_CLIENTID;
450
451 spin_lock(&nn->nfs_client_lock);
452 list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) {
453
454
455
456
457 if (pos->cl_cons_state > NFS_CS_READY) {
458 atomic_inc(&pos->cl_count);
459 spin_unlock(&nn->nfs_client_lock);
460
461 if (prev)
462 nfs_put_client(prev);
463 prev = pos;
464
465 status = nfs_wait_client_init_complete(pos);
466 if (status == 0) {
467 nfs4_schedule_lease_recovery(pos);
468 status = nfs4_wait_clnt_recover(pos);
469 }
470 spin_lock(&nn->nfs_client_lock);
471 if (status < 0)
472 continue;
473 }
474 if (pos->cl_cons_state != NFS_CS_READY)
475 continue;
476
477 if (pos->rpc_ops != new->rpc_ops)
478 continue;
479
480 if (pos->cl_proto != new->cl_proto)
481 continue;
482
483 if (pos->cl_minorversion != new->cl_minorversion)
484 continue;
485
486 if (!nfs4_match_clientids(pos, new))
487 continue;
488
489 if (!nfs4_match_serverowners(pos, new))
490 continue;
491
492 atomic_inc(&pos->cl_count);
493 *result = pos;
494 status = 0;
495 dprintk("NFS: <-- %s using nfs_client = %p ({%d})\n",
496 __func__, pos, atomic_read(&pos->cl_count));
497 break;
498 }
499
500
501 spin_unlock(&nn->nfs_client_lock);
502 dprintk("NFS: <-- %s status = %d\n", __func__, status);
503 if (prev)
504 nfs_put_client(prev);
505 return status;
506}
507#endif
508
509static void nfs4_destroy_server(struct nfs_server *server)
510{
511 nfs_server_return_all_delegations(server);
512 unset_pnfs_layoutdriver(server);
513 nfs4_purge_state_owners(server);
514}
515
516
517
518
519
520
521struct nfs_client *
522nfs4_find_client_ident(struct net *net, int cb_ident)
523{
524 struct nfs_client *clp;
525 struct nfs_net *nn = net_generic(net, nfs_net_id);
526
527 spin_lock(&nn->nfs_client_lock);
528 clp = idr_find(&nn->cb_ident_idr, cb_ident);
529 if (clp)
530 atomic_inc(&clp->cl_count);
531 spin_unlock(&nn->nfs_client_lock);
532 return clp;
533}
534
535#if defined(CONFIG_NFS_V4_1)
536
537static bool nfs4_cb_match_client(const struct sockaddr *addr,
538 struct nfs_client *clp, u32 minorversion)
539{
540 struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
541
542
543 if (!(clp->cl_cons_state == NFS_CS_READY ||
544 clp->cl_cons_state == NFS_CS_SESSION_INITING))
545 return false;
546
547 smp_rmb();
548
549
550 if (clp->rpc_ops->version != 4 ||
551 clp->cl_minorversion != minorversion)
552 return false;
553
554
555 if (!nfs_sockaddr_match_ipaddr(addr, clap))
556 return false;
557
558 return true;
559}
560
561
562
563
564
565
566
567
568struct nfs_client *
569nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
570 struct nfs4_sessionid *sid, u32 minorversion)
571{
572 struct nfs_client *clp;
573 struct nfs_net *nn = net_generic(net, nfs_net_id);
574
575 spin_lock(&nn->nfs_client_lock);
576 list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
577 if (nfs4_cb_match_client(addr, clp, minorversion) == false)
578 continue;
579
580 if (!nfs4_has_session(clp))
581 continue;
582
583
584 if (memcmp(clp->cl_session->sess_id.data,
585 sid->data, NFS4_MAX_SESSIONID_LEN) != 0)
586 continue;
587
588 atomic_inc(&clp->cl_count);
589 spin_unlock(&nn->nfs_client_lock);
590 return clp;
591 }
592 spin_unlock(&nn->nfs_client_lock);
593 return NULL;
594}
595
596#else
597
598struct nfs_client *
599nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
600 struct nfs4_sessionid *sid, u32 minorversion)
601{
602 return NULL;
603}
604#endif
605
606
607
608
609static int nfs4_set_client(struct nfs_server *server,
610 const char *hostname,
611 const struct sockaddr *addr,
612 const size_t addrlen,
613 const char *ip_addr,
614 rpc_authflavor_t authflavour,
615 int proto, const struct rpc_timeout *timeparms,
616 u32 minorversion, struct net *net)
617{
618 struct nfs_client_initdata cl_init = {
619 .hostname = hostname,
620 .addr = addr,
621 .addrlen = addrlen,
622 .nfs_mod = &nfs_v4,
623 .proto = proto,
624 .minorversion = minorversion,
625 .net = net,
626 };
627 struct nfs_client *clp;
628 int error;
629
630 dprintk("--> nfs4_set_client()\n");
631
632 if (server->flags & NFS_MOUNT_NORESVPORT)
633 set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
634 if (server->options & NFS_OPTION_MIGRATION)
635 set_bit(NFS_CS_MIGRATION, &cl_init.init_flags);
636
637
638 clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour);
639 if (IS_ERR(clp)) {
640 error = PTR_ERR(clp);
641 goto error;
642 }
643
644
645
646
647
648
649
650
651 set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state);
652
653 server->nfs_client = clp;
654 dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp);
655 return 0;
656error:
657 dprintk("<-- nfs4_set_client() = xerror %d\n", error);
658 return error;
659}
660
661
662
663
664
665
666
667
668
669
670
671struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
672 const struct sockaddr *ds_addr, int ds_addrlen,
673 int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
674{
675 struct nfs_client_initdata cl_init = {
676 .addr = ds_addr,
677 .addrlen = ds_addrlen,
678 .nfs_mod = &nfs_v4,
679 .proto = ds_proto,
680 .minorversion = mds_clp->cl_minorversion,
681 .net = mds_clp->cl_net,
682 };
683 struct rpc_timeout ds_timeout;
684 struct nfs_client *clp;
685
686
687
688
689
690
691 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
692 clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
693 mds_clp->cl_rpcclient->cl_auth->au_flavor);
694
695 dprintk("<-- %s %p\n", __func__, clp);
696 return clp;
697}
698EXPORT_SYMBOL_GPL(nfs4_set_ds_client);
699
700
701
702
703
704
705static void nfs4_session_set_rwsize(struct nfs_server *server)
706{
707#ifdef CONFIG_NFS_V4_1
708 struct nfs4_session *sess;
709 u32 server_resp_sz;
710 u32 server_rqst_sz;
711
712 if (!nfs4_has_session(server->nfs_client))
713 return;
714 sess = server->nfs_client->cl_session;
715 server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
716 server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
717
718 if (server->rsize > server_resp_sz)
719 server->rsize = server_resp_sz;
720 if (server->wsize > server_rqst_sz)
721 server->wsize = server_rqst_sz;
722#endif
723}
724
725static int nfs4_server_common_setup(struct nfs_server *server,
726 struct nfs_fh *mntfh)
727{
728 struct nfs_fattr *fattr;
729 int error;
730
731
732 if (is_ds_only_client(server->nfs_client))
733 return -EPROTONOSUPPORT;
734
735 fattr = nfs_alloc_fattr();
736 if (fattr == NULL)
737 return -ENOMEM;
738
739
740 error = nfs4_init_session(server->nfs_client);
741 if (error < 0)
742 goto out;
743
744
745 server->caps |= server->nfs_client->cl_mvops->init_caps;
746 if (server->flags & NFS_MOUNT_NORDIRPLUS)
747 server->caps &= ~NFS_CAP_READDIRPLUS;
748
749
750
751
752 if (nfs4_disable_idmapping &&
753 server->client->cl_auth->au_flavor == RPC_AUTH_UNIX)
754 server->caps |= NFS_CAP_UIDGID_NOMAP;
755
756
757
758 error = nfs4_get_rootfh(server, mntfh);
759 if (error < 0)
760 goto out;
761
762 dprintk("Server FSID: %llx:%llx\n",
763 (unsigned long long) server->fsid.major,
764 (unsigned long long) server->fsid.minor);
765 dprintk("Mount FH: %d\n", mntfh->size);
766
767 nfs4_session_set_rwsize(server);
768
769 error = nfs_probe_fsinfo(server, mntfh, fattr);
770 if (error < 0)
771 goto out;
772
773 if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
774 server->namelen = NFS4_MAXNAMLEN;
775
776 nfs_server_insert_lists(server);
777 server->mount_time = jiffies;
778 server->destroy = nfs4_destroy_server;
779out:
780 nfs_free_fattr(fattr);
781 return error;
782}
783
784
785
786
787static int nfs4_init_server(struct nfs_server *server,
788 const struct nfs_parsed_mount_data *data)
789{
790 struct rpc_timeout timeparms;
791 int error;
792
793 dprintk("--> nfs4_init_server()\n");
794
795 nfs_init_timeout_values(&timeparms, data->nfs_server.protocol,
796 data->timeo, data->retrans);
797
798
799 server->flags = data->flags;
800 server->options = data->options;
801
802
803 error = nfs4_set_client(server,
804 data->nfs_server.hostname,
805 (const struct sockaddr *)&data->nfs_server.address,
806 data->nfs_server.addrlen,
807 data->client_address,
808 data->auth_flavors[0],
809 data->nfs_server.protocol,
810 &timeparms,
811 data->minorversion,
812 data->net);
813 if (error < 0)
814 goto error;
815
816 if (data->rsize)
817 server->rsize = nfs_block_size(data->rsize, NULL);
818 if (data->wsize)
819 server->wsize = nfs_block_size(data->wsize, NULL);
820
821 server->acregmin = data->acregmin * HZ;
822 server->acregmax = data->acregmax * HZ;
823 server->acdirmin = data->acdirmin * HZ;
824 server->acdirmax = data->acdirmax * HZ;
825
826 server->port = data->nfs_server.port;
827
828 error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]);
829
830error:
831
832 dprintk("<-- nfs4_init_server() = %d\n", error);
833 return error;
834}
835
836
837
838
839
840
841
842struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
843 struct nfs_subversion *nfs_mod)
844{
845 struct nfs_server *server;
846 int error;
847
848 dprintk("--> nfs4_create_server()\n");
849
850 server = nfs_alloc_server();
851 if (!server)
852 return ERR_PTR(-ENOMEM);
853
854
855 error = nfs4_init_server(server, mount_info->parsed);
856 if (error < 0)
857 goto error;
858
859 error = nfs4_server_common_setup(server, mount_info->mntfh);
860 if (error < 0)
861 goto error;
862
863 dprintk("<-- nfs4_create_server() = %p\n", server);
864 return server;
865
866error:
867 nfs_free_server(server);
868 dprintk("<-- nfs4_create_server() = error %d\n", error);
869 return ERR_PTR(error);
870}
871
872
873
874
875struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
876 struct nfs_fh *mntfh)
877{
878 struct nfs_client *parent_client;
879 struct nfs_server *server, *parent_server;
880 int error;
881
882 dprintk("--> nfs4_create_referral_server()\n");
883
884 server = nfs_alloc_server();
885 if (!server)
886 return ERR_PTR(-ENOMEM);
887
888 parent_server = NFS_SB(data->sb);
889 parent_client = parent_server->nfs_client;
890
891
892 nfs_server_copy_userdata(server, parent_server);
893
894
895
896 error = nfs4_set_client(server, data->hostname,
897 data->addr,
898 data->addrlen,
899 parent_client->cl_ipaddr,
900 data->authflavor,
901 rpc_protocol(parent_server->client),
902 parent_server->client->cl_timeout,
903 parent_client->cl_mvops->minor_version,
904 parent_client->cl_net);
905 if (error < 0)
906 goto error;
907
908 error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor);
909 if (error < 0)
910 goto error;
911
912 error = nfs4_server_common_setup(server, mntfh);
913 if (error < 0)
914 goto error;
915
916 dprintk("<-- nfs_create_referral_server() = %p\n", server);
917 return server;
918
919error:
920 nfs_free_server(server);
921 dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
922 return ERR_PTR(error);
923}
924