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38#include <linux/mm.h>
39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
50#include <linux/nfs_mount.h>
51#include <linux/namei.h>
52#include <linux/mount.h>
53#include <linux/module.h>
54#include <linux/xattr.h>
55#include <linux/utsname.h>
56#include <linux/freezer.h>
57
58#include "nfs4_fs.h"
59#include "delegation.h"
60#include "internal.h"
61#include "iostat.h"
62#include "callback.h"
63#include "pnfs.h"
64#include "netns.h"
65#include "nfs4idmap.h"
66#include "nfs4session.h"
67#include "fscache.h"
68
69#include "nfs4trace.h"
70
71#define NFSDBG_FACILITY NFSDBG_PROC
72
73#define NFS4_POLL_RETRY_MIN (HZ/10)
74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
76
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
87struct nfs4_opendata;
88static int _nfs4_proc_open(struct nfs4_opendata *data);
89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98#ifdef CONFIG_NFS_V4_1
99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
103#endif
104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
151
152static int nfs4_map_errors(int err)
153{
154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
160 return -EREMOTEIO;
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
163 return -EPERM;
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
173 default:
174 dprintk("%s could not handle NFSv4 error %d\n",
175 __func__, -err);
176 break;
177 }
178 return -EIO;
179}
180
181
182
183
184const u32 nfs4_fattr_bitmap[3] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
203};
204
205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
224};
225
226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
228 | FATTR4_WORD0_FILEID,
229};
230
231const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
240const u32 nfs4_pathconf_bitmap[3] = {
241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
254};
255
256const u32 nfs4_fs_locations_bitmap[3] = {
257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
273};
274
275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
277{
278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
279 __be32 *start, *p;
280
281 if (cookie > 2) {
282 readdir->cookie = cookie;
283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
284 return;
285 }
286
287 readdir->cookie = 0;
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
289 if (cookie == 2)
290 return;
291
292
293
294
295
296
297
298
299 start = p = kmap_atomic(*readdir->pages);
300
301 if (cookie == 0) {
302 *p++ = xdr_one;
303 *p++ = xdr_zero;
304 *p++ = xdr_one;
305 *p++ = xdr_one;
306 memcpy(p, ".\0\0\0", 4);
307 p++;
308 *p++ = xdr_one;
309 *p++ = htonl(attrs);
310 *p++ = htonl(12);
311 *p++ = htonl(NF4DIR);
312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
313 }
314
315 *p++ = xdr_one;
316 *p++ = xdr_zero;
317 *p++ = xdr_two;
318 *p++ = xdr_two;
319 memcpy(p, "..\0\0", 4);
320 p++;
321 *p++ = xdr_one;
322 *p++ = htonl(attrs);
323 *p++ = htonl(12);
324 *p++ = htonl(NF4DIR);
325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
326
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
329 kunmap_atomic(start);
330}
331
332static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
335{
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337
338 ops->test_and_free_expired(server, stateid, cred);
339}
340
341static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
344{
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
347}
348
349static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
352{
353 nfs4_stateid tmp;
354
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
357}
358
359static long nfs4_update_delay(long *timeout)
360{
361 long ret;
362 if (!timeout)
363 return NFS4_POLL_RETRY_MAX;
364 if (*timeout <= 0)
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
368 ret = *timeout;
369 *timeout <<= 1;
370 return ret;
371}
372
373static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
374{
375 int res = 0;
376
377 might_sleep();
378
379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
381 if (fatal_signal_pending(current))
382 res = -ERESTARTSYS;
383 return res;
384}
385
386
387
388
389static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
391{
392 struct nfs_client *clp = server->nfs_client;
393 struct nfs4_state *state = exception->state;
394 const nfs4_stateid *stateid = exception->stateid;
395 struct inode *inode = exception->inode;
396 int ret = errorcode;
397
398 exception->delay = 0;
399 exception->recovering = 0;
400 exception->retry = 0;
401
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
404
405 switch(errorcode) {
406 case 0:
407 return 0;
408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
410 case -NFS4ERR_EXPIRED:
411 case -NFS4ERR_BAD_STATEID:
412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
414 stateid);
415 goto wait_on_recovery;
416 }
417 case -NFS4ERR_OPENMODE:
418 if (inode) {
419 int err;
420
421 err = nfs_async_inode_return_delegation(inode,
422 stateid);
423 if (err == 0)
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
427 break;
428 }
429 }
430 if (state == NULL)
431 break;
432 ret = nfs4_schedule_stateid_recovery(server, state);
433 if (ret < 0)
434 break;
435 goto wait_on_recovery;
436 case -NFS4ERR_STALE_STATEID:
437 case -NFS4ERR_STALE_CLIENTID:
438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
440 case -NFS4ERR_MOVED:
441 ret = nfs4_schedule_migration_recovery(server);
442 if (ret < 0)
443 break;
444 goto wait_on_recovery;
445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
448#if defined(CONFIG_NFS_V4_1)
449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
457 errorcode);
458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
459 goto wait_on_recovery;
460#endif
461 case -NFS4ERR_FILE_OPEN:
462 if (exception->timeout > HZ) {
463
464
465
466 ret = -EBUSY;
467 break;
468 }
469 case -NFS4ERR_DELAY:
470 nfs_inc_server_stats(server, NFSIOS_DELAY);
471 case -NFS4ERR_GRACE:
472 case -NFS4ERR_LAYOUTTRYLATER:
473 case -NFS4ERR_RECALLCONFLICT:
474 exception->delay = 1;
475 return 0;
476
477 case -NFS4ERR_RETRY_UNCACHED_REP:
478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
480 break;
481 case -NFS4ERR_BADOWNER:
482
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
489 "uid/gids. "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
492 }
493 }
494
495 return nfs4_map_errors(ret);
496wait_on_recovery:
497 exception->recovering = 1;
498 return 0;
499}
500
501
502
503
504int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
505{
506 struct nfs_client *clp = server->nfs_client;
507 int ret;
508
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
512 goto out_retry;
513 }
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
517 return -EIO;
518 goto out_retry;
519 }
520 return ret;
521out_retry:
522 if (ret == 0)
523 exception->retry = 1;
524 return ret;
525}
526
527static int
528nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
530{
531 struct nfs_client *clp = server->nfs_client;
532 int ret;
533
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
537 goto out_retry;
538 }
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
543 goto out_retry;
544 }
545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
546 ret = -EIO;
547 return ret;
548out_retry:
549 if (ret == 0)
550 exception->retry = 1;
551 return ret;
552}
553
554static int
555nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
557{
558 struct nfs4_exception exception = {
559 .state = state,
560 };
561
562 if (task->tk_status >= 0)
563 return 0;
564 if (timeout)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
567 task->tk_status,
568 &exception);
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
571 if (exception.retry)
572 return -EAGAIN;
573 return 0;
574}
575
576
577
578
579
580static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
581{
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
584}
585
586static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
587{
588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
592}
593
594static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
595{
596 struct nfs_client *clp = server->nfs_client;
597
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
600}
601
602struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606};
607
608void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
610{
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
614
615 res->sr_slot = NULL;
616}
617
618static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
619{
620 args->sa_privileged = 1;
621}
622
623static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
624{
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
627
628 tbl = slot->table;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
633
634 res->sr_slot = NULL;
635}
636
637static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
639{
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
642 return 1;
643}
644
645#if defined(CONFIG_NFS_V4_1)
646
647static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
648{
649 struct nfs4_session *session;
650 struct nfs4_slot_table *tbl;
651 struct nfs4_slot *slot = res->sr_slot;
652 bool send_new_highest_used_slotid = false;
653
654 tbl = slot->table;
655 session = tbl->session;
656
657
658 if (slot->seq_done)
659 slot->seq_nr++;
660 slot->seq_done = 0;
661
662 spin_lock(&tbl->slot_tbl_lock);
663
664
665
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
668
669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
670 send_new_highest_used_slotid = false;
671 goto out_unlock;
672 }
673 nfs4_free_slot(tbl, slot);
674
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
677out_unlock:
678 spin_unlock(&tbl->slot_tbl_lock);
679 res->sr_slot = NULL;
680 if (send_new_highest_used_slotid)
681 nfs41_notify_server(session->clp);
682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
684}
685
686static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
688{
689 struct nfs4_session *session;
690 struct nfs4_slot *slot = res->sr_slot;
691 struct nfs_client *clp;
692 bool interrupted = false;
693 int ret = 1;
694
695 if (slot == NULL)
696 goto out_noaction;
697
698 if (!RPC_WAS_SENT(task))
699 goto out;
700
701 session = slot->table->session;
702
703 if (slot->interrupted) {
704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
706 interrupted = true;
707 }
708
709 trace_nfs4_sequence_done(session, res);
710
711 switch (res->sr_status) {
712 case 0:
713
714
715
716 if (task->tk_status == -EREMOTEIO && interrupted) {
717 ++slot->seq_nr;
718 goto retry_nowait;
719 }
720
721 slot->seq_done = 1;
722 clp = session->clp;
723 do_renew_lease(clp, res->sr_timestamp);
724
725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
726 !!slot->privileged);
727 nfs41_update_target_slotid(slot->table, slot, res);
728 break;
729 case 1:
730
731
732
733
734
735
736 slot->interrupted = 1;
737 goto out;
738 case -NFS4ERR_DELAY:
739
740
741
742
743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
744 __func__,
745 slot->slot_nr,
746 slot->seq_nr);
747 goto out_retry;
748 case -NFS4ERR_BADSLOT:
749
750
751
752
753 goto retry_nowait;
754 case -NFS4ERR_SEQ_MISORDERED:
755
756
757
758
759 if (interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
763
764
765
766
767 if (slot->seq_nr != 1) {
768 slot->seq_nr = 1;
769 goto retry_nowait;
770 }
771 break;
772 case -NFS4ERR_SEQ_FALSE_RETRY:
773 ++slot->seq_nr;
774 goto retry_nowait;
775 default:
776
777 slot->seq_done = 1;
778 }
779out:
780
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
782out_noaction:
783 return ret;
784retry_nowait:
785 if (rpc_restart_call_prepare(task)) {
786 nfs41_sequence_free_slot(res);
787 task->tk_status = 0;
788 ret = 0;
789 }
790 goto out;
791out_retry:
792 if (!rpc_restart_call(task))
793 goto out;
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
795 return 0;
796}
797
798int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
799{
800 if (!nfs41_sequence_process(task, res))
801 return 0;
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
804 return 1;
805
806}
807EXPORT_SYMBOL_GPL(nfs41_sequence_done);
808
809static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
810{
811 if (res->sr_slot == NULL)
812 return 1;
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
816}
817
818static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
819{
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
823 else
824 nfs40_sequence_free_slot(res);
825 }
826}
827
828int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
829{
830 if (res->sr_slot == NULL)
831 return 1;
832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
834 return nfs41_sequence_done(task, res);
835}
836EXPORT_SYMBOL_GPL(nfs4_sequence_done);
837
838static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841
842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
843
844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
846}
847
848static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
849{
850 struct nfs4_call_sync_data *data = calldata;
851
852 nfs41_sequence_done(task, data->seq_res);
853}
854
855static const struct rpc_call_ops nfs41_call_sync_ops = {
856 .rpc_call_prepare = nfs41_call_sync_prepare,
857 .rpc_call_done = nfs41_call_sync_done,
858};
859
860#else
861
862static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
863{
864 return nfs40_sequence_done(task, res);
865}
866
867static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
868{
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
871}
872
873int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
875{
876 return nfs40_sequence_done(task, res);
877}
878EXPORT_SYMBOL_GPL(nfs4_sequence_done);
879
880#endif
881
882int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
886{
887 struct nfs4_session *session = nfs4_get_session(client);
888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
889 struct nfs4_slot *slot;
890
891
892 if (res->sr_slot != NULL)
893 goto out_start;
894
895 if (session) {
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
898 }
899
900 spin_lock(&tbl->slot_tbl_lock);
901
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
903 goto out_sleep;
904
905 slot = nfs4_alloc_slot(tbl);
906 if (IS_ERR(slot)) {
907
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
910 goto out_sleep;
911 }
912 spin_unlock(&tbl->slot_tbl_lock);
913
914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
916
917 res->sr_slot = slot;
918 if (session) {
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
921 res->sr_status = 1;
922 }
923
924 trace_nfs4_setup_sequence(session, args);
925out_start:
926 rpc_call_start(task);
927 return 0;
928
929out_sleep:
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
933 else
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
936 return -EAGAIN;
937}
938EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
939
940static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
941{
942 struct nfs4_call_sync_data *data = calldata;
943 nfs4_setup_sequence(data->seq_server->nfs_client,
944 data->seq_args, data->seq_res, task);
945}
946
947static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
951}
952
953static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
956};
957
958static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res)
963{
964 int ret;
965 struct rpc_task *task;
966 struct nfs_client *clp = server->nfs_client;
967 struct nfs4_call_sync_data data = {
968 .seq_server = server,
969 .seq_args = args,
970 .seq_res = res,
971 };
972 struct rpc_task_setup task_setup = {
973 .rpc_client = clnt,
974 .rpc_message = msg,
975 .callback_ops = clp->cl_mvops->call_sync_ops,
976 .callback_data = &data
977 };
978
979 task = rpc_run_task(&task_setup);
980 if (IS_ERR(task))
981 ret = PTR_ERR(task);
982 else {
983 ret = task->tk_status;
984 rpc_put_task(task);
985 }
986 return ret;
987}
988
989int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
994 int cache_reply)
995{
996 nfs4_init_sequence(args, res, cache_reply);
997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
998}
999
1000static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1002{
1003 struct nfs_inode *nfsi = NFS_I(dir);
1004
1005 spin_lock(&dir->i_lock);
1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1010 } else {
1011 nfs_force_lookup_revalidate(dir);
1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1015 }
1016 dir->i_version = cinfo->after;
1017 nfsi->read_cache_jiffies = timestamp;
1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1019 nfs_fscache_invalidate(dir);
1020 spin_unlock(&dir->i_lock);
1021}
1022
1023struct nfs4_opendata {
1024 struct kref kref;
1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
1031 struct nfs4_label *a_label;
1032 struct nfs_fattr f_attr;
1033 struct nfs4_label *f_label;
1034 struct dentry *dir;
1035 struct dentry *dentry;
1036 struct nfs4_state_owner *owner;
1037 struct nfs4_state *state;
1038 struct iattr attrs;
1039 unsigned long timestamp;
1040 bool rpc_done;
1041 bool file_created;
1042 bool is_recover;
1043 bool cancelled;
1044 int rpc_status;
1045};
1046
1047static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1049{
1050 if (err != -EINVAL)
1051 return false;
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1053 return false;
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1056 return true;
1057}
1058
1059static u32
1060nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1062{
1063 u32 res = 0;
1064
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1066 case FMODE_READ:
1067 res = NFS4_SHARE_ACCESS_READ;
1068 break;
1069 case FMODE_WRITE:
1070 res = NFS4_SHARE_ACCESS_WRITE;
1071 break;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1074 }
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1076 goto out;
1077
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1080out:
1081 return res;
1082}
1083
1084static enum open_claim_type4
1085nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1087{
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 return claim;
1090 switch (claim) {
1091 default:
1092 return claim;
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1099 }
1100}
1101
1102static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1103{
1104 p->o_res.f_attr = &p->f_attr;
1105 p->o_res.f_label = p->f_label;
1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
1108 p->o_res.server = p->o_arg.server;
1109 p->o_res.access_request = p->o_arg.access;
1110 nfs_fattr_init(&p->f_attr);
1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1112}
1113
1114static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1116 const struct iattr *attrs,
1117 struct nfs4_label *label,
1118 enum open_claim_type4 claim,
1119 gfp_t gfp_mask)
1120{
1121 struct dentry *parent = dget_parent(dentry);
1122 struct inode *dir = d_inode(parent);
1123 struct nfs_server *server = NFS_SERVER(dir);
1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1125 struct nfs4_opendata *p;
1126
1127 p = kzalloc(sizeof(*p), gfp_mask);
1128 if (p == NULL)
1129 goto err;
1130
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1133 goto err_free_p;
1134
1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1137 goto err_free_f;
1138
1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1141 if (IS_ERR(p->o_arg.seqid))
1142 goto err_free_label;
1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
1145 p->dir = parent;
1146 p->owner = sp;
1147 atomic_inc(&sp->so_count);
1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1150 p->o_arg.umask = current_umask();
1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1153 fmode, flags);
1154
1155
1156 if (!(flags & O_EXCL)) {
1157
1158
1159 switch (p->o_arg.claim) {
1160 default:
1161 break;
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1168 }
1169 }
1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1173 p->o_arg.name = &dentry->d_name;
1174 p->o_arg.server = server;
1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1178 switch (p->o_arg.claim) {
1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1183 break;
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
1189 }
1190 if (attrs != NULL && attrs->ia_valid != 0) {
1191 __u32 verf[2];
1192
1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1195
1196 verf[0] = jiffies;
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
1200 }
1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
1204 nfs4_init_opendata_res(p);
1205 kref_init(&p->kref);
1206 return p;
1207
1208err_free_label:
1209 nfs4_label_free(p->a_label);
1210err_free_f:
1211 nfs4_label_free(p->f_label);
1212err_free_p:
1213 kfree(p);
1214err:
1215 dput(parent);
1216 return NULL;
1217}
1218
1219static void nfs4_opendata_free(struct kref *kref)
1220{
1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
1223 struct super_block *sb = p->dentry->d_sb;
1224
1225 nfs_free_seqid(p->o_arg.seqid);
1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
1229 nfs4_put_state_owner(p->owner);
1230
1231 nfs4_label_free(p->a_label);
1232 nfs4_label_free(p->f_label);
1233
1234 dput(p->dir);
1235 dput(p->dentry);
1236 nfs_sb_deactive(sb);
1237 nfs_fattr_free_names(&p->f_attr);
1238 kfree(p->f_attr.mdsthreshold);
1239 kfree(p);
1240}
1241
1242static void nfs4_opendata_put(struct nfs4_opendata *p)
1243{
1244 if (p != NULL)
1245 kref_put(&p->kref, nfs4_opendata_free);
1246}
1247
1248static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1249 fmode_t fmode)
1250{
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1254 case FMODE_WRITE:
1255 return state->n_wronly != 0;
1256 case FMODE_READ:
1257 return state->n_rdonly != 0;
1258 }
1259 WARN_ON_ONCE(1);
1260 return false;
1261}
1262
1263static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1264{
1265 int ret = 0;
1266
1267 if (open_mode & (O_EXCL|O_TRUNC))
1268 goto out;
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1270 case FMODE_READ:
1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
1273 break;
1274 case FMODE_WRITE:
1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
1277 break;
1278 case FMODE_READ|FMODE_WRITE:
1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
1281 }
1282out:
1283 return ret;
1284}
1285
1286static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
1288{
1289 if (delegation == NULL)
1290 return 0;
1291 if ((delegation->type & fmode) != fmode)
1292 return 0;
1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1294 return 0;
1295 switch (claim) {
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1298 break;
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 break;
1302 default:
1303 return 0;
1304 }
1305 nfs_mark_delegation_referenced(delegation);
1306 return 1;
1307}
1308
1309static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1310{
1311 switch (fmode) {
1312 case FMODE_WRITE:
1313 state->n_wronly++;
1314 break;
1315 case FMODE_READ:
1316 state->n_rdonly++;
1317 break;
1318 case FMODE_READ|FMODE_WRITE:
1319 state->n_rdwr++;
1320 }
1321 nfs4_state_set_mode_locked(state, state->state | fmode);
1322}
1323
1324#ifdef CONFIG_NFS_V4_1
1325static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1326{
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1328 return true;
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1330 return true;
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1332 return true;
1333 return false;
1334}
1335#endif
1336
1337static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1338{
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1341
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1348 if (need_recover)
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1350}
1351
1352static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1354{
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1356 return true;
1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1358 nfs4_stateid_copy(freeme, &state->open_stateid);
1359 nfs_test_and_clear_all_open_stateid(state);
1360 return true;
1361 }
1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 return true;
1364 return false;
1365}
1366
1367static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1368{
1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1370 return;
1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1375 if (state->n_rdwr)
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 set_bit(NFS_OPEN_STATE, &state->flags);
1378}
1379
1380static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
1382{
1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1385 case FMODE_WRITE:
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1387 break;
1388 case FMODE_READ:
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 break;
1391 case 0:
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1395 }
1396 if (stateid == NULL)
1397 return;
1398
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1401 nfs_resync_open_stateid_locked(state);
1402 return;
1403 }
1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
1407}
1408
1409static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
1412{
1413 write_seqlock(&state->seqlock);
1414
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
1417 write_sequnlock(&state->seqlock);
1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1420}
1421
1422static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
1425{
1426 switch (fmode) {
1427 case FMODE_READ:
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1429 break;
1430 case FMODE_WRITE:
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1432 break;
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1435 }
1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1437 return;
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
1441}
1442
1443static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1446 fmode_t fmode,
1447 nfs4_stateid *freeme)
1448{
1449
1450
1451
1452
1453 spin_lock(&state->owner->so_lock);
1454 write_seqlock(&state->seqlock);
1455 if (deleg_stateid != NULL) {
1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1458 }
1459 if (open_stateid != NULL)
1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1461 write_sequnlock(&state->seqlock);
1462 update_open_stateflags(state, fmode);
1463 spin_unlock(&state->owner->so_lock);
1464}
1465
1466static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1469 fmode_t fmode)
1470{
1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
1475 nfs4_stateid freeme = { };
1476 int ret = 0;
1477
1478 fmode &= (FMODE_READ|FMODE_WRITE);
1479
1480 rcu_read_lock();
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1483 goto no_delegation;
1484
1485 spin_lock(&deleg_cur->lock);
1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1488 (deleg_cur->type & fmode) != fmode)
1489 goto no_delegation_unlock;
1490
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1494 goto no_delegation_unlock;
1495
1496 nfs_mark_delegation_referenced(deleg_cur);
1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1498 fmode, &freeme);
1499 ret = 1;
1500no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1502no_delegation:
1503 rcu_read_unlock();
1504
1505 if (!ret && open_stateid != NULL) {
1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1507 ret = 1;
1508 }
1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
1514
1515 return ret;
1516}
1517
1518static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1520{
1521 struct nfs4_state *state = lsp->ls_state;
1522 bool ret = false;
1523
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1526 goto out_noupdate;
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1528 goto out_noupdate;
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1530 ret = true;
1531out_noupdate:
1532 spin_unlock(&state->state_lock);
1533 return ret;
1534}
1535
1536static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1537{
1538 struct nfs_delegation *delegation;
1539
1540 rcu_read_lock();
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1543 rcu_read_unlock();
1544 return;
1545 }
1546 rcu_read_unlock();
1547 nfs4_inode_return_delegation(inode);
1548}
1549
1550static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1551{
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
1555 int open_mode = opendata->o_arg.open_flags;
1556 fmode_t fmode = opendata->o_arg.fmode;
1557 enum open_claim_type4 claim = opendata->o_arg.claim;
1558 nfs4_stateid stateid;
1559 int ret = -EAGAIN;
1560
1561 for (;;) {
1562 spin_lock(&state->owner->so_lock);
1563 if (can_open_cached(state, fmode, open_mode)) {
1564 update_open_stateflags(state, fmode);
1565 spin_unlock(&state->owner->so_lock);
1566 goto out_return_state;
1567 }
1568 spin_unlock(&state->owner->so_lock);
1569 rcu_read_lock();
1570 delegation = rcu_dereference(nfsi->delegation);
1571 if (!can_open_delegated(delegation, fmode, claim)) {
1572 rcu_read_unlock();
1573 break;
1574 }
1575
1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
1577 rcu_read_unlock();
1578 nfs_release_seqid(opendata->o_arg.seqid);
1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1581 if (ret != 0)
1582 goto out;
1583 }
1584 ret = -EAGAIN;
1585
1586
1587 if (update_open_stateid(state, NULL, &stateid, fmode))
1588 goto out_return_state;
1589 }
1590out:
1591 return ERR_PTR(ret);
1592out_return_state:
1593 atomic_inc(&state->count);
1594 return state;
1595}
1596
1597static void
1598nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1599{
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1603
1604 rcu_read_lock();
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1606 if (delegation)
1607 delegation_flags = delegation->flags;
1608 rcu_read_unlock();
1609 switch (data->o_arg.claim) {
1610 default:
1611 break;
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1617 clp->cl_hostname);
1618 return;
1619 }
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1623 &data->o_res);
1624 else
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1627 &data->o_res);
1628}
1629
1630
1631
1632
1633
1634static struct nfs4_state *
1635_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1636{
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1639 int ret;
1640
1641 if (!data->rpc_done) {
1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
1644
1645 goto update;
1646 }
1647
1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1649 if (ret)
1650 return ERR_PTR(ret);
1651
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
1654update:
1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1656 data->o_arg.fmode);
1657 atomic_inc(&state->count);
1658
1659 return state;
1660}
1661
1662static struct nfs4_state *
1663_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1664{
1665 struct inode *inode;
1666 struct nfs4_state *state = NULL;
1667 int ret;
1668
1669 if (!data->rpc_done) {
1670 state = nfs4_try_open_cached(data);
1671 trace_nfs4_cached_open(data->state);
1672 goto out;
1673 }
1674
1675 ret = -EAGAIN;
1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1677 goto err;
1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1679 ret = PTR_ERR(inode);
1680 if (IS_ERR(inode))
1681 goto err;
1682 ret = -ENOMEM;
1683 state = nfs4_get_open_state(inode, data->owner);
1684 if (state == NULL)
1685 goto err_put_inode;
1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
1688 update_open_stateid(state, &data->o_res.stateid, NULL,
1689 data->o_arg.fmode);
1690 iput(inode);
1691out:
1692 nfs_release_seqid(data->o_arg.seqid);
1693 return state;
1694err_put_inode:
1695 iput(inode);
1696err:
1697 return ERR_PTR(ret);
1698}
1699
1700static struct nfs4_state *
1701nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1702{
1703 struct nfs4_state *ret;
1704
1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1707 else
1708 ret = _nfs4_opendata_to_nfs4_state(data);
1709 nfs4_sequence_free_slot(&data->o_res.seq_res);
1710 return ret;
1711}
1712
1713static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1714{
1715 struct nfs_inode *nfsi = NFS_I(state->inode);
1716 struct nfs_open_context *ctx;
1717
1718 spin_lock(&state->inode->i_lock);
1719 list_for_each_entry(ctx, &nfsi->open_files, list) {
1720 if (ctx->state != state)
1721 continue;
1722 get_nfs_open_context(ctx);
1723 spin_unlock(&state->inode->i_lock);
1724 return ctx;
1725 }
1726 spin_unlock(&state->inode->i_lock);
1727 return ERR_PTR(-ENOENT);
1728}
1729
1730static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1731 struct nfs4_state *state, enum open_claim_type4 claim)
1732{
1733 struct nfs4_opendata *opendata;
1734
1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1736 NULL, NULL, claim, GFP_NOFS);
1737 if (opendata == NULL)
1738 return ERR_PTR(-ENOMEM);
1739 opendata->state = state;
1740 atomic_inc(&state->count);
1741 return opendata;
1742}
1743
1744static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1745 fmode_t fmode)
1746{
1747 struct nfs4_state *newstate;
1748 int ret;
1749
1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1751 return 0;
1752 opendata->o_arg.open_flags = 0;
1753 opendata->o_arg.fmode = fmode;
1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1755 NFS_SB(opendata->dentry->d_sb),
1756 fmode, 0);
1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1759 nfs4_init_opendata_res(opendata);
1760 ret = _nfs4_recover_proc_open(opendata);
1761 if (ret != 0)
1762 return ret;
1763 newstate = nfs4_opendata_to_nfs4_state(opendata);
1764 if (IS_ERR(newstate))
1765 return PTR_ERR(newstate);
1766 if (newstate != opendata->state)
1767 ret = -ESTALE;
1768 nfs4_close_state(newstate, fmode);
1769 return ret;
1770}
1771
1772static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1773{
1774 int ret;
1775
1776
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1780
1781 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1782 clear_bit(NFS_OPEN_STATE, &state->flags);
1783 smp_rmb();
1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1785 if (ret != 0)
1786 return ret;
1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1788 if (ret != 0)
1789 return ret;
1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1791 if (ret != 0)
1792 return ret;
1793
1794
1795
1796
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1799 write_seqlock(&state->seqlock);
1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1802 write_sequnlock(&state->seqlock);
1803 }
1804 return 0;
1805}
1806
1807
1808
1809
1810
1811static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1812{
1813 struct nfs_delegation *delegation;
1814 struct nfs4_opendata *opendata;
1815 fmode_t delegation_type = 0;
1816 int status;
1817
1818 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1819 NFS4_OPEN_CLAIM_PREVIOUS);
1820 if (IS_ERR(opendata))
1821 return PTR_ERR(opendata);
1822 rcu_read_lock();
1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1825 delegation_type = delegation->type;
1826 rcu_read_unlock();
1827 opendata->o_arg.u.delegation_type = delegation_type;
1828 status = nfs4_open_recover(opendata, state);
1829 nfs4_opendata_put(opendata);
1830 return status;
1831}
1832
1833static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1834{
1835 struct nfs_server *server = NFS_SERVER(state->inode);
1836 struct nfs4_exception exception = { };
1837 int err;
1838 do {
1839 err = _nfs4_do_open_reclaim(ctx, state);
1840 trace_nfs4_open_reclaim(ctx, 0, err);
1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1842 continue;
1843 if (err != -NFS4ERR_DELAY)
1844 break;
1845 nfs4_handle_exception(server, err, &exception);
1846 } while (exception.retry);
1847 return err;
1848}
1849
1850static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1851{
1852 struct nfs_open_context *ctx;
1853 int ret;
1854
1855 ctx = nfs4_state_find_open_context(state);
1856 if (IS_ERR(ctx))
1857 return -EAGAIN;
1858 ret = nfs4_do_open_reclaim(ctx, state);
1859 put_nfs_open_context(ctx);
1860 return ret;
1861}
1862
1863static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1864{
1865 switch (err) {
1866 default:
1867 printk(KERN_ERR "NFS: %s: unhandled error "
1868 "%d.\n", __func__, err);
1869 case 0:
1870 case -ENOENT:
1871 case -EAGAIN:
1872 case -ESTALE:
1873 break;
1874 case -NFS4ERR_BADSESSION:
1875 case -NFS4ERR_BADSLOT:
1876 case -NFS4ERR_BAD_HIGH_SLOT:
1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1878 case -NFS4ERR_DEADSESSION:
1879 set_bit(NFS_DELEGATED_STATE, &state->flags);
1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1881 return -EAGAIN;
1882 case -NFS4ERR_STALE_CLIENTID:
1883 case -NFS4ERR_STALE_STATEID:
1884 set_bit(NFS_DELEGATED_STATE, &state->flags);
1885
1886 nfs4_schedule_lease_recovery(server->nfs_client);
1887 return -EAGAIN;
1888 case -NFS4ERR_MOVED:
1889 nfs4_schedule_migration_recovery(server);
1890 return -EAGAIN;
1891 case -NFS4ERR_LEASE_MOVED:
1892 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1893 return -EAGAIN;
1894 case -NFS4ERR_DELEG_REVOKED:
1895 case -NFS4ERR_ADMIN_REVOKED:
1896 case -NFS4ERR_EXPIRED:
1897 case -NFS4ERR_BAD_STATEID:
1898 case -NFS4ERR_OPENMODE:
1899 nfs_inode_find_state_and_recover(state->inode,
1900 stateid);
1901 nfs4_schedule_stateid_recovery(server, state);
1902 return -EAGAIN;
1903 case -NFS4ERR_DELAY:
1904 case -NFS4ERR_GRACE:
1905 set_bit(NFS_DELEGATED_STATE, &state->flags);
1906 ssleep(1);
1907 return -EAGAIN;
1908 case -ENOMEM:
1909 case -NFS4ERR_DENIED:
1910
1911 return 0;
1912 }
1913 return err;
1914}
1915
1916int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1917 struct nfs4_state *state, const nfs4_stateid *stateid,
1918 fmode_t type)
1919{
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_opendata *opendata;
1922 int err = 0;
1923
1924 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1926 if (IS_ERR(opendata))
1927 return PTR_ERR(opendata);
1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1929 write_seqlock(&state->seqlock);
1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1931 write_sequnlock(&state->seqlock);
1932 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1933 switch (type & (FMODE_READ|FMODE_WRITE)) {
1934 case FMODE_READ|FMODE_WRITE:
1935 case FMODE_WRITE:
1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1937 if (err)
1938 break;
1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1940 if (err)
1941 break;
1942 case FMODE_READ:
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1944 }
1945 nfs4_opendata_put(opendata);
1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1947}
1948
1949static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1950{
1951 struct nfs4_opendata *data = calldata;
1952
1953 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1954 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1955}
1956
1957static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1958{
1959 struct nfs4_opendata *data = calldata;
1960
1961 nfs40_sequence_done(task, &data->c_res.seq_res);
1962
1963 data->rpc_status = task->tk_status;
1964 if (data->rpc_status == 0) {
1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1966 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1967 renew_lease(data->o_res.server, data->timestamp);
1968 data->rpc_done = true;
1969 }
1970}
1971
1972static void nfs4_open_confirm_release(void *calldata)
1973{
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1976
1977
1978 if (!data->cancelled)
1979 goto out_free;
1980
1981 if (!data->rpc_done)
1982 goto out_free;
1983 state = nfs4_opendata_to_nfs4_state(data);
1984 if (!IS_ERR(state))
1985 nfs4_close_state(state, data->o_arg.fmode);
1986out_free:
1987 nfs4_opendata_put(data);
1988}
1989
1990static const struct rpc_call_ops nfs4_open_confirm_ops = {
1991 .rpc_call_prepare = nfs4_open_confirm_prepare,
1992 .rpc_call_done = nfs4_open_confirm_done,
1993 .rpc_release = nfs4_open_confirm_release,
1994};
1995
1996
1997
1998
1999static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2000{
2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2002 struct rpc_task *task;
2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2005 .rpc_argp = &data->c_arg,
2006 .rpc_resp = &data->c_res,
2007 .rpc_cred = data->owner->so_cred,
2008 };
2009 struct rpc_task_setup task_setup_data = {
2010 .rpc_client = server->client,
2011 .rpc_message = &msg,
2012 .callback_ops = &nfs4_open_confirm_ops,
2013 .callback_data = data,
2014 .workqueue = nfsiod_workqueue,
2015 .flags = RPC_TASK_ASYNC,
2016 };
2017 int status;
2018
2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2020 kref_get(&data->kref);
2021 data->rpc_done = false;
2022 data->rpc_status = 0;
2023 data->timestamp = jiffies;
2024 if (data->is_recover)
2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2026 task = rpc_run_task(&task_setup_data);
2027 if (IS_ERR(task))
2028 return PTR_ERR(task);
2029 status = rpc_wait_for_completion_task(task);
2030 if (status != 0) {
2031 data->cancelled = true;
2032 smp_wmb();
2033 } else
2034 status = data->rpc_status;
2035 rpc_put_task(task);
2036 return status;
2037}
2038
2039static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2040{
2041 struct nfs4_opendata *data = calldata;
2042 struct nfs4_state_owner *sp = data->owner;
2043 struct nfs_client *clp = sp->so_server->nfs_client;
2044 enum open_claim_type4 claim = data->o_arg.claim;
2045
2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2047 goto out_wait;
2048
2049
2050
2051
2052 if (data->state != NULL) {
2053 struct nfs_delegation *delegation;
2054
2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2056 goto out_no_action;
2057 rcu_read_lock();
2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2060 goto unlock_no_action;
2061 rcu_read_unlock();
2062 }
2063
2064 data->o_arg.clientid = clp->cl_clientid;
2065 switch (claim) {
2066 default:
2067 break;
2068 case NFS4_OPEN_CLAIM_PREVIOUS:
2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2072 case NFS4_OPEN_CLAIM_FH:
2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2075 }
2076 data->timestamp = jiffies;
2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2078 &data->o_arg.seq_args,
2079 &data->o_res.seq_res,
2080 task) != 0)
2081 nfs_release_seqid(data->o_arg.seqid);
2082
2083
2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2085 if (data->o_arg.open_flags & O_EXCL) {
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2087 if (nfs4_has_persistent_session(clp))
2088 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2089 else if (clp->cl_mvops->minor_version > 0)
2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2091 }
2092 return;
2093unlock_no_action:
2094 trace_nfs4_cached_open(data->state);
2095 rcu_read_unlock();
2096out_no_action:
2097 task->tk_action = NULL;
2098out_wait:
2099 nfs4_sequence_done(task, &data->o_res.seq_res);
2100}
2101
2102static void nfs4_open_done(struct rpc_task *task, void *calldata)
2103{
2104 struct nfs4_opendata *data = calldata;
2105
2106 data->rpc_status = task->tk_status;
2107
2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2109 return;
2110
2111 if (task->tk_status == 0) {
2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2113 switch (data->o_res.f_attr->mode & S_IFMT) {
2114 case S_IFREG:
2115 break;
2116 case S_IFLNK:
2117 data->rpc_status = -ELOOP;
2118 break;
2119 case S_IFDIR:
2120 data->rpc_status = -EISDIR;
2121 break;
2122 default:
2123 data->rpc_status = -ENOTDIR;
2124 }
2125 }
2126 renew_lease(data->o_res.server, data->timestamp);
2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2128 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2129 }
2130 data->rpc_done = true;
2131}
2132
2133static void nfs4_open_release(void *calldata)
2134{
2135 struct nfs4_opendata *data = calldata;
2136 struct nfs4_state *state = NULL;
2137
2138
2139 if (!data->cancelled)
2140 goto out_free;
2141
2142 if (data->rpc_status != 0 || !data->rpc_done)
2143 goto out_free;
2144
2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2146 goto out_free;
2147 state = nfs4_opendata_to_nfs4_state(data);
2148 if (!IS_ERR(state))
2149 nfs4_close_state(state, data->o_arg.fmode);
2150out_free:
2151 nfs4_opendata_put(data);
2152}
2153
2154static const struct rpc_call_ops nfs4_open_ops = {
2155 .rpc_call_prepare = nfs4_open_prepare,
2156 .rpc_call_done = nfs4_open_done,
2157 .rpc_release = nfs4_open_release,
2158};
2159
2160static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2161{
2162 struct inode *dir = d_inode(data->dir);
2163 struct nfs_server *server = NFS_SERVER(dir);
2164 struct nfs_openargs *o_arg = &data->o_arg;
2165 struct nfs_openres *o_res = &data->o_res;
2166 struct rpc_task *task;
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2169 .rpc_argp = o_arg,
2170 .rpc_resp = o_res,
2171 .rpc_cred = data->owner->so_cred,
2172 };
2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
2175 .rpc_message = &msg,
2176 .callback_ops = &nfs4_open_ops,
2177 .callback_data = data,
2178 .workqueue = nfsiod_workqueue,
2179 .flags = RPC_TASK_ASYNC,
2180 };
2181 int status;
2182
2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2184 kref_get(&data->kref);
2185 data->rpc_done = false;
2186 data->rpc_status = 0;
2187 data->cancelled = false;
2188 data->is_recover = false;
2189 if (isrecover) {
2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
2191 data->is_recover = true;
2192 }
2193 task = rpc_run_task(&task_setup_data);
2194 if (IS_ERR(task))
2195 return PTR_ERR(task);
2196 status = rpc_wait_for_completion_task(task);
2197 if (status != 0) {
2198 data->cancelled = true;
2199 smp_wmb();
2200 } else
2201 status = data->rpc_status;
2202 rpc_put_task(task);
2203
2204 return status;
2205}
2206
2207static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2208{
2209 struct inode *dir = d_inode(data->dir);
2210 struct nfs_openres *o_res = &data->o_res;
2211 int status;
2212
2213 status = nfs4_run_open_task(data, 1);
2214 if (status != 0 || !data->rpc_done)
2215 return status;
2216
2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2218
2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2220 status = _nfs4_proc_open_confirm(data);
2221
2222 return status;
2223}
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233static int nfs4_opendata_access(struct rpc_cred *cred,
2234 struct nfs4_opendata *opendata,
2235 struct nfs4_state *state, fmode_t fmode,
2236 int openflags)
2237{
2238 struct nfs_access_entry cache;
2239 u32 mask, flags;
2240
2241
2242
2243 if (opendata->o_res.access_supported == 0)
2244 return 0;
2245
2246 mask = 0;
2247
2248
2249
2250
2251 if (openflags & __FMODE_EXEC) {
2252
2253 if (S_ISDIR(state->inode->i_mode))
2254 mask = NFS4_ACCESS_LOOKUP;
2255 else
2256 mask = NFS4_ACCESS_EXECUTE;
2257 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2258 mask = NFS4_ACCESS_READ;
2259
2260 cache.cred = cred;
2261 cache.jiffies = jiffies;
2262 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2263 nfs_access_add_cache(state->inode, &cache);
2264
2265 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2266 if ((mask & ~cache.mask & flags) == 0)
2267 return 0;
2268
2269 return -EACCES;
2270}
2271
2272
2273
2274
2275static int _nfs4_proc_open(struct nfs4_opendata *data)
2276{
2277 struct inode *dir = d_inode(data->dir);
2278 struct nfs_server *server = NFS_SERVER(dir);
2279 struct nfs_openargs *o_arg = &data->o_arg;
2280 struct nfs_openres *o_res = &data->o_res;
2281 int status;
2282
2283 status = nfs4_run_open_task(data, 0);
2284 if (!data->rpc_done)
2285 return status;
2286 if (status != 0) {
2287 if (status == -NFS4ERR_BADNAME &&
2288 !(o_arg->open_flags & O_CREAT))
2289 return -ENOENT;
2290 return status;
2291 }
2292
2293 nfs_fattr_map_and_free_names(server, &data->f_attr);
2294
2295 if (o_arg->open_flags & O_CREAT) {
2296 if (o_arg->open_flags & O_EXCL)
2297 data->file_created = true;
2298 else if (o_res->cinfo.before != o_res->cinfo.after)
2299 data->file_created = true;
2300 if (data->file_created || dir->i_version != o_res->cinfo.after)
2301 update_changeattr(dir, &o_res->cinfo,
2302 o_res->f_attr->time_start);
2303 }
2304 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2305 server->caps &= ~NFS_CAP_POSIX_LOCK;
2306 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2307 status = _nfs4_proc_open_confirm(data);
2308 if (status != 0)
2309 return status;
2310 }
2311 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2312 nfs4_sequence_free_slot(&o_res->seq_res);
2313 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2314 }
2315 return 0;
2316}
2317
2318
2319
2320
2321
2322
2323static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2324{
2325 struct nfs4_opendata *opendata;
2326 int ret;
2327
2328 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2329 NFS4_OPEN_CLAIM_FH);
2330 if (IS_ERR(opendata))
2331 return PTR_ERR(opendata);
2332 ret = nfs4_open_recover(opendata, state);
2333 if (ret == -ESTALE)
2334 d_drop(ctx->dentry);
2335 nfs4_opendata_put(opendata);
2336 return ret;
2337}
2338
2339static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2340{
2341 struct nfs_server *server = NFS_SERVER(state->inode);
2342 struct nfs4_exception exception = { };
2343 int err;
2344
2345 do {
2346 err = _nfs4_open_expired(ctx, state);
2347 trace_nfs4_open_expired(ctx, 0, err);
2348 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2349 continue;
2350 switch (err) {
2351 default:
2352 goto out;
2353 case -NFS4ERR_GRACE:
2354 case -NFS4ERR_DELAY:
2355 nfs4_handle_exception(server, err, &exception);
2356 err = 0;
2357 }
2358 } while (exception.retry);
2359out:
2360 return err;
2361}
2362
2363static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2364{
2365 struct nfs_open_context *ctx;
2366 int ret;
2367
2368 ctx = nfs4_state_find_open_context(state);
2369 if (IS_ERR(ctx))
2370 return -EAGAIN;
2371 ret = nfs4_do_open_expired(ctx, state);
2372 put_nfs_open_context(ctx);
2373 return ret;
2374}
2375
2376static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2377 const nfs4_stateid *stateid)
2378{
2379 nfs_remove_bad_delegation(state->inode, stateid);
2380 write_seqlock(&state->seqlock);
2381 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2382 write_sequnlock(&state->seqlock);
2383 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2384}
2385
2386static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2387{
2388 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2389 nfs_finish_clear_delegation_stateid(state, NULL);
2390}
2391
2392static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2393{
2394
2395 nfs40_clear_delegation_stateid(state);
2396 return nfs4_open_expired(sp, state);
2397}
2398
2399static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2400 nfs4_stateid *stateid,
2401 struct rpc_cred *cred)
2402{
2403 return -NFS4ERR_BAD_STATEID;
2404}
2405
2406#if defined(CONFIG_NFS_V4_1)
2407static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2408 nfs4_stateid *stateid,
2409 struct rpc_cred *cred)
2410{
2411 int status;
2412
2413 switch (stateid->type) {
2414 default:
2415 break;
2416 case NFS4_INVALID_STATEID_TYPE:
2417 case NFS4_SPECIAL_STATEID_TYPE:
2418 return -NFS4ERR_BAD_STATEID;
2419 case NFS4_REVOKED_STATEID_TYPE:
2420 goto out_free;
2421 }
2422
2423 status = nfs41_test_stateid(server, stateid, cred);
2424 switch (status) {
2425 case -NFS4ERR_EXPIRED:
2426 case -NFS4ERR_ADMIN_REVOKED:
2427 case -NFS4ERR_DELEG_REVOKED:
2428 break;
2429 default:
2430 return status;
2431 }
2432out_free:
2433
2434 nfs41_free_stateid(server, stateid, cred, true);
2435 return -NFS4ERR_EXPIRED;
2436}
2437
2438static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2439{
2440 struct nfs_server *server = NFS_SERVER(state->inode);
2441 nfs4_stateid stateid;
2442 struct nfs_delegation *delegation;
2443 struct rpc_cred *cred;
2444 int status;
2445
2446
2447 rcu_read_lock();
2448 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2449 if (delegation == NULL) {
2450 rcu_read_unlock();
2451 return;
2452 }
2453
2454 nfs4_stateid_copy(&stateid, &delegation->stateid);
2455 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2456 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2457 &delegation->flags)) {
2458 rcu_read_unlock();
2459 nfs_finish_clear_delegation_stateid(state, &stateid);
2460 return;
2461 }
2462
2463 cred = get_rpccred(delegation->cred);
2464 rcu_read_unlock();
2465 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2466 trace_nfs4_test_delegation_stateid(state, NULL, status);
2467 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2468 nfs_finish_clear_delegation_stateid(state, &stateid);
2469
2470 put_rpccred(cred);
2471}
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481static int nfs41_check_expired_locks(struct nfs4_state *state)
2482{
2483 int status, ret = NFS_OK;
2484 struct nfs4_lock_state *lsp, *prev = NULL;
2485 struct nfs_server *server = NFS_SERVER(state->inode);
2486
2487 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2488 goto out;
2489
2490 spin_lock(&state->state_lock);
2491 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2492 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2494
2495 atomic_inc(&lsp->ls_count);
2496 spin_unlock(&state->state_lock);
2497
2498 nfs4_put_lock_state(prev);
2499 prev = lsp;
2500
2501 status = nfs41_test_and_free_expired_stateid(server,
2502 &lsp->ls_stateid,
2503 cred);
2504 trace_nfs4_test_lock_stateid(state, lsp, status);
2505 if (status == -NFS4ERR_EXPIRED ||
2506 status == -NFS4ERR_BAD_STATEID) {
2507 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2508 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2509 if (!recover_lost_locks)
2510 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2511 } else if (status != NFS_OK) {
2512 ret = status;
2513 nfs4_put_lock_state(prev);
2514 goto out;
2515 }
2516 spin_lock(&state->state_lock);
2517 }
2518 }
2519 spin_unlock(&state->state_lock);
2520 nfs4_put_lock_state(prev);
2521out:
2522 return ret;
2523}
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533static int nfs41_check_open_stateid(struct nfs4_state *state)
2534{
2535 struct nfs_server *server = NFS_SERVER(state->inode);
2536 nfs4_stateid *stateid = &state->open_stateid;
2537 struct rpc_cred *cred = state->owner->so_cred;
2538 int status;
2539
2540 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2541 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2542 if (nfs4_have_delegation(state->inode, state->state))
2543 return NFS_OK;
2544 return -NFS4ERR_OPENMODE;
2545 }
2546 return -NFS4ERR_BAD_STATEID;
2547 }
2548 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2549 trace_nfs4_test_open_stateid(state, NULL, status);
2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2551 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2552 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2553 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2554 clear_bit(NFS_OPEN_STATE, &state->flags);
2555 stateid->type = NFS4_INVALID_STATEID_TYPE;
2556 return status;
2557 }
2558 if (nfs_open_stateid_recover_openmode(state))
2559 return -NFS4ERR_OPENMODE;
2560 return NFS_OK;
2561}
2562
2563static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2564{
2565 int status;
2566
2567 nfs41_check_delegation_stateid(state);
2568 status = nfs41_check_expired_locks(state);
2569 if (status != NFS_OK)
2570 return status;
2571 status = nfs41_check_open_stateid(state);
2572 if (status != NFS_OK)
2573 status = nfs4_open_expired(sp, state);
2574 return status;
2575}
2576#endif
2577
2578
2579
2580
2581
2582
2583static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2584 struct iattr *sattr, struct nfs4_label **label)
2585{
2586 const u32 *attrset = opendata->o_res.attrset;
2587
2588 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2589 !(sattr->ia_valid & ATTR_ATIME_SET))
2590 sattr->ia_valid |= ATTR_ATIME;
2591
2592 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2593 !(sattr->ia_valid & ATTR_MTIME_SET))
2594 sattr->ia_valid |= ATTR_MTIME;
2595
2596
2597 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2598 (attrset[1] & FATTR4_WORD1_MODE ||
2599 attrset[2] & FATTR4_WORD2_MODE_UMASK))
2600 sattr->ia_valid &= ~ATTR_MODE;
2601
2602 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2603 *label = NULL;
2604}
2605
2606static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2607 fmode_t fmode,
2608 int flags,
2609 struct nfs_open_context *ctx)
2610{
2611 struct nfs4_state_owner *sp = opendata->owner;
2612 struct nfs_server *server = sp->so_server;
2613 struct dentry *dentry;
2614 struct nfs4_state *state;
2615 unsigned int seq;
2616 int ret;
2617
2618 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2619
2620 ret = _nfs4_proc_open(opendata);
2621 if (ret != 0)
2622 goto out;
2623
2624 state = nfs4_opendata_to_nfs4_state(opendata);
2625 ret = PTR_ERR(state);
2626 if (IS_ERR(state))
2627 goto out;
2628 ctx->state = state;
2629 if (server->caps & NFS_CAP_POSIX_LOCK)
2630 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2631 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2632 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2633
2634 dentry = opendata->dentry;
2635 if (d_really_is_negative(dentry)) {
2636 struct dentry *alias;
2637 d_drop(dentry);
2638 alias = d_exact_alias(dentry, state->inode);
2639 if (!alias)
2640 alias = d_splice_alias(igrab(state->inode), dentry);
2641
2642 if (alias) {
2643 dput(ctx->dentry);
2644 ctx->dentry = dentry = alias;
2645 }
2646 nfs_set_verifier(dentry,
2647 nfs_save_change_attribute(d_inode(opendata->dir)));
2648 }
2649
2650 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2651 if (ret != 0)
2652 goto out;
2653
2654 if (d_inode(dentry) == state->inode) {
2655 nfs_inode_attach_open_context(ctx);
2656 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2657 nfs4_schedule_stateid_recovery(server, state);
2658 }
2659out:
2660 return ret;
2661}
2662
2663
2664
2665
2666static int _nfs4_do_open(struct inode *dir,
2667 struct nfs_open_context *ctx,
2668 int flags,
2669 struct iattr *sattr,
2670 struct nfs4_label *label,
2671 int *opened)
2672{
2673 struct nfs4_state_owner *sp;
2674 struct nfs4_state *state = NULL;
2675 struct nfs_server *server = NFS_SERVER(dir);
2676 struct nfs4_opendata *opendata;
2677 struct dentry *dentry = ctx->dentry;
2678 struct rpc_cred *cred = ctx->cred;
2679 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2680 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2681 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2682 struct nfs4_label *olabel = NULL;
2683 int status;
2684
2685
2686 status = -ENOMEM;
2687 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2688 if (sp == NULL) {
2689 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2690 goto out_err;
2691 }
2692 status = nfs4_client_recover_expired_lease(server->nfs_client);
2693 if (status != 0)
2694 goto err_put_state_owner;
2695 if (d_really_is_positive(dentry))
2696 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2697 status = -ENOMEM;
2698 if (d_really_is_positive(dentry))
2699 claim = NFS4_OPEN_CLAIM_FH;
2700 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2701 label, claim, GFP_KERNEL);
2702 if (opendata == NULL)
2703 goto err_put_state_owner;
2704
2705 if (label) {
2706 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2707 if (IS_ERR(olabel)) {
2708 status = PTR_ERR(olabel);
2709 goto err_opendata_put;
2710 }
2711 }
2712
2713 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2714 if (!opendata->f_attr.mdsthreshold) {
2715 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2716 if (!opendata->f_attr.mdsthreshold)
2717 goto err_free_label;
2718 }
2719 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2720 }
2721 if (d_really_is_positive(dentry))
2722 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2723
2724 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2725 if (status != 0)
2726 goto err_free_label;
2727 state = ctx->state;
2728
2729 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2730 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2731 nfs4_exclusive_attrset(opendata, sattr, &label);
2732
2733
2734
2735
2736 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2737 nfs_fattr_init(opendata->o_res.f_attr);
2738 status = nfs4_do_setattr(state->inode, cred,
2739 opendata->o_res.f_attr, sattr,
2740 ctx, label, olabel);
2741 if (status == 0) {
2742 nfs_setattr_update_inode(state->inode, sattr,
2743 opendata->o_res.f_attr);
2744 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2745 }
2746 }
2747 }
2748 if (opened && opendata->file_created)
2749 *opened |= FILE_CREATED;
2750
2751 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2752 *ctx_th = opendata->f_attr.mdsthreshold;
2753 opendata->f_attr.mdsthreshold = NULL;
2754 }
2755
2756 nfs4_label_free(olabel);
2757
2758 nfs4_opendata_put(opendata);
2759 nfs4_put_state_owner(sp);
2760 return 0;
2761err_free_label:
2762 nfs4_label_free(olabel);
2763err_opendata_put:
2764 nfs4_opendata_put(opendata);
2765err_put_state_owner:
2766 nfs4_put_state_owner(sp);
2767out_err:
2768 return status;
2769}
2770
2771
2772static struct nfs4_state *nfs4_do_open(struct inode *dir,
2773 struct nfs_open_context *ctx,
2774 int flags,
2775 struct iattr *sattr,
2776 struct nfs4_label *label,
2777 int *opened)
2778{
2779 struct nfs_server *server = NFS_SERVER(dir);
2780 struct nfs4_exception exception = { };
2781 struct nfs4_state *res;
2782 int status;
2783
2784 do {
2785 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2786 res = ctx->state;
2787 trace_nfs4_open_file(ctx, flags, status);
2788 if (status == 0)
2789 break;
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801 if (status == -NFS4ERR_BAD_SEQID) {
2802 pr_warn_ratelimited("NFS: v4 server %s "
2803 " returned a bad sequence-id error!\n",
2804 NFS_SERVER(dir)->nfs_client->cl_hostname);
2805 exception.retry = 1;
2806 continue;
2807 }
2808
2809
2810
2811
2812
2813
2814 if (status == -NFS4ERR_BAD_STATEID) {
2815 exception.retry = 1;
2816 continue;
2817 }
2818 if (status == -EAGAIN) {
2819
2820 exception.retry = 1;
2821 continue;
2822 }
2823 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2824 continue;
2825 res = ERR_PTR(nfs4_handle_exception(server,
2826 status, &exception));
2827 } while (exception.retry);
2828 return res;
2829}
2830
2831static int _nfs4_do_setattr(struct inode *inode,
2832 struct nfs_setattrargs *arg,
2833 struct nfs_setattrres *res,
2834 struct rpc_cred *cred,
2835 struct nfs_open_context *ctx)
2836{
2837 struct nfs_server *server = NFS_SERVER(inode);
2838 struct rpc_message msg = {
2839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2840 .rpc_argp = arg,
2841 .rpc_resp = res,
2842 .rpc_cred = cred,
2843 };
2844 struct rpc_cred *delegation_cred = NULL;
2845 unsigned long timestamp = jiffies;
2846 fmode_t fmode;
2847 bool truncate;
2848 int status;
2849
2850 nfs_fattr_init(res->fattr);
2851
2852
2853 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2854 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2855
2856 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2857
2858 } else if (truncate && ctx != NULL) {
2859 struct nfs_lock_context *l_ctx;
2860 if (!nfs4_valid_open_stateid(ctx->state))
2861 return -EBADF;
2862 l_ctx = nfs_get_lock_context(ctx);
2863 if (IS_ERR(l_ctx))
2864 return PTR_ERR(l_ctx);
2865 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2866 &arg->stateid, &delegation_cred);
2867 nfs_put_lock_context(l_ctx);
2868 if (status == -EIO)
2869 return -EBADF;
2870 } else
2871 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2872 if (delegation_cred)
2873 msg.rpc_cred = delegation_cred;
2874
2875 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2876
2877 put_rpccred(delegation_cred);
2878 if (status == 0 && ctx != NULL)
2879 renew_lease(server, timestamp);
2880 trace_nfs4_setattr(inode, &arg->stateid, status);
2881 return status;
2882}
2883
2884static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2885 struct nfs_fattr *fattr, struct iattr *sattr,
2886 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2887 struct nfs4_label *olabel)
2888{
2889 struct nfs_server *server = NFS_SERVER(inode);
2890 struct nfs4_state *state = ctx ? ctx->state : NULL;
2891 struct nfs_setattrargs arg = {
2892 .fh = NFS_FH(inode),
2893 .iap = sattr,
2894 .server = server,
2895 .bitmask = server->attr_bitmask,
2896 .label = ilabel,
2897 };
2898 struct nfs_setattrres res = {
2899 .fattr = fattr,
2900 .label = olabel,
2901 .server = server,
2902 };
2903 struct nfs4_exception exception = {
2904 .state = state,
2905 .inode = inode,
2906 .stateid = &arg.stateid,
2907 };
2908 int err;
2909
2910 arg.bitmask = nfs4_bitmask(server, ilabel);
2911 if (ilabel)
2912 arg.bitmask = nfs4_bitmask(server, olabel);
2913
2914 do {
2915 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2916 switch (err) {
2917 case -NFS4ERR_OPENMODE:
2918 if (!(sattr->ia_valid & ATTR_SIZE)) {
2919 pr_warn_once("NFSv4: server %s is incorrectly "
2920 "applying open mode checks to "
2921 "a SETATTR that is not "
2922 "changing file size.\n",
2923 server->nfs_client->cl_hostname);
2924 }
2925 if (state && !(state->state & FMODE_WRITE)) {
2926 err = -EBADF;
2927 if (sattr->ia_valid & ATTR_OPEN)
2928 err = -EACCES;
2929 goto out;
2930 }
2931 }
2932 err = nfs4_handle_exception(server, err, &exception);
2933 } while (exception.retry);
2934out:
2935 return err;
2936}
2937
2938static bool
2939nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2940{
2941 if (inode == NULL || !nfs_have_layout(inode))
2942 return false;
2943
2944 return pnfs_wait_on_layoutreturn(inode, task);
2945}
2946
2947struct nfs4_closedata {
2948 struct inode *inode;
2949 struct nfs4_state *state;
2950 struct nfs_closeargs arg;
2951 struct nfs_closeres res;
2952 struct {
2953 struct nfs4_layoutreturn_args arg;
2954 struct nfs4_layoutreturn_res res;
2955 struct nfs4_xdr_opaque_data ld_private;
2956 u32 roc_barrier;
2957 bool roc;
2958 } lr;
2959 struct nfs_fattr fattr;
2960 unsigned long timestamp;
2961};
2962
2963static void nfs4_free_closedata(void *data)
2964{
2965 struct nfs4_closedata *calldata = data;
2966 struct nfs4_state_owner *sp = calldata->state->owner;
2967 struct super_block *sb = calldata->state->inode->i_sb;
2968
2969 if (calldata->lr.roc)
2970 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2971 calldata->res.lr_ret);
2972 nfs4_put_open_state(calldata->state);
2973 nfs_free_seqid(calldata->arg.seqid);
2974 nfs4_put_state_owner(sp);
2975 nfs_sb_deactive(sb);
2976 kfree(calldata);
2977}
2978
2979static void nfs4_close_done(struct rpc_task *task, void *data)
2980{
2981 struct nfs4_closedata *calldata = data;
2982 struct nfs4_state *state = calldata->state;
2983 struct nfs_server *server = NFS_SERVER(calldata->inode);
2984 nfs4_stateid *res_stateid = NULL;
2985
2986 dprintk("%s: begin!\n", __func__);
2987 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2988 return;
2989 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2990
2991
2992 if (calldata->arg.lr_args && task->tk_status != 0) {
2993 switch (calldata->res.lr_ret) {
2994 default:
2995 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2996 break;
2997 case 0:
2998 calldata->arg.lr_args = NULL;
2999 calldata->res.lr_res = NULL;
3000 break;
3001 case -NFS4ERR_ADMIN_REVOKED:
3002 case -NFS4ERR_DELEG_REVOKED:
3003 case -NFS4ERR_EXPIRED:
3004 case -NFS4ERR_BAD_STATEID:
3005 case -NFS4ERR_OLD_STATEID:
3006 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3007 case -NFS4ERR_WRONG_CRED:
3008 calldata->arg.lr_args = NULL;
3009 calldata->res.lr_res = NULL;
3010 calldata->res.lr_ret = 0;
3011 rpc_restart_call_prepare(task);
3012 return;
3013 }
3014 }
3015
3016
3017
3018
3019 switch (task->tk_status) {
3020 case 0:
3021 res_stateid = &calldata->res.stateid;
3022 renew_lease(server, calldata->timestamp);
3023 break;
3024 case -NFS4ERR_ACCESS:
3025 if (calldata->arg.bitmask != NULL) {
3026 calldata->arg.bitmask = NULL;
3027 calldata->res.fattr = NULL;
3028 task->tk_status = 0;
3029 rpc_restart_call_prepare(task);
3030 goto out_release;
3031
3032 }
3033 break;
3034 case -NFS4ERR_ADMIN_REVOKED:
3035 case -NFS4ERR_STALE_STATEID:
3036 case -NFS4ERR_EXPIRED:
3037 nfs4_free_revoked_stateid(server,
3038 &calldata->arg.stateid,
3039 task->tk_msg.rpc_cred);
3040 case -NFS4ERR_OLD_STATEID:
3041 case -NFS4ERR_BAD_STATEID:
3042 if (!nfs4_stateid_match(&calldata->arg.stateid,
3043 &state->open_stateid)) {
3044 rpc_restart_call_prepare(task);
3045 goto out_release;
3046 }
3047 if (calldata->arg.fmode == 0)
3048 break;
3049 default:
3050 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3051 rpc_restart_call_prepare(task);
3052 goto out_release;
3053 }
3054 }
3055 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3056 res_stateid, calldata->arg.fmode);
3057out_release:
3058 nfs_release_seqid(calldata->arg.seqid);
3059 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3060 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3061}
3062
3063static void nfs4_close_prepare(struct rpc_task *task, void *data)
3064{
3065 struct nfs4_closedata *calldata = data;
3066 struct nfs4_state *state = calldata->state;
3067 struct inode *inode = calldata->inode;
3068 bool is_rdonly, is_wronly, is_rdwr;
3069 int call_close = 0;
3070
3071 dprintk("%s: begin!\n", __func__);
3072 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3073 goto out_wait;
3074
3075 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3076 spin_lock(&state->owner->so_lock);
3077 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3078 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3079 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3080 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3081
3082 calldata->arg.fmode = 0;
3083 if (state->n_rdwr == 0) {
3084 if (state->n_rdonly == 0)
3085 call_close |= is_rdonly;
3086 else if (is_rdonly)
3087 calldata->arg.fmode |= FMODE_READ;
3088 if (state->n_wronly == 0)
3089 call_close |= is_wronly;
3090 else if (is_wronly)
3091 calldata->arg.fmode |= FMODE_WRITE;
3092 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3093 call_close |= is_rdwr;
3094 } else if (is_rdwr)
3095 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3096
3097 if (!nfs4_valid_open_stateid(state) ||
3098 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3099 call_close = 0;
3100 spin_unlock(&state->owner->so_lock);
3101
3102 if (!call_close) {
3103
3104 goto out_no_action;
3105 }
3106
3107 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3108 nfs_release_seqid(calldata->arg.seqid);
3109 goto out_wait;
3110 }
3111
3112 if (calldata->arg.fmode == 0)
3113 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3114
3115 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3116
3117 if (!nfs4_have_delegation(inode, FMODE_READ))
3118 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3119 else
3120 calldata->arg.bitmask = NULL;
3121 }
3122
3123 calldata->arg.share_access =
3124 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3125 calldata->arg.fmode, 0);
3126
3127 if (calldata->res.fattr == NULL)
3128 calldata->arg.bitmask = NULL;
3129 else if (calldata->arg.bitmask == NULL)
3130 calldata->res.fattr = NULL;
3131 calldata->timestamp = jiffies;
3132 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3133 &calldata->arg.seq_args,
3134 &calldata->res.seq_res,
3135 task) != 0)
3136 nfs_release_seqid(calldata->arg.seqid);
3137 dprintk("%s: done!\n", __func__);
3138 return;
3139out_no_action:
3140 task->tk_action = NULL;
3141out_wait:
3142 nfs4_sequence_done(task, &calldata->res.seq_res);
3143}
3144
3145static const struct rpc_call_ops nfs4_close_ops = {
3146 .rpc_call_prepare = nfs4_close_prepare,
3147 .rpc_call_done = nfs4_close_done,
3148 .rpc_release = nfs4_free_closedata,
3149};
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3163{
3164 struct nfs_server *server = NFS_SERVER(state->inode);
3165 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3166 struct nfs4_closedata *calldata;
3167 struct nfs4_state_owner *sp = state->owner;
3168 struct rpc_task *task;
3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3171 .rpc_cred = state->owner->so_cred,
3172 };
3173 struct rpc_task_setup task_setup_data = {
3174 .rpc_client = server->client,
3175 .rpc_message = &msg,
3176 .callback_ops = &nfs4_close_ops,
3177 .workqueue = nfsiod_workqueue,
3178 .flags = RPC_TASK_ASYNC,
3179 };
3180 int status = -ENOMEM;
3181
3182 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3183 &task_setup_data.rpc_client, &msg);
3184
3185 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3186 if (calldata == NULL)
3187 goto out;
3188 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3189 calldata->inode = state->inode;
3190 calldata->state = state;
3191 calldata->arg.fh = NFS_FH(state->inode);
3192
3193 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3194 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3195 if (IS_ERR(calldata->arg.seqid))
3196 goto out_free_calldata;
3197 nfs_fattr_init(&calldata->fattr);
3198 calldata->arg.fmode = 0;
3199 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3200 calldata->res.fattr = &calldata->fattr;
3201 calldata->res.seqid = calldata->arg.seqid;
3202 calldata->res.server = server;
3203 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3204 calldata->lr.roc = pnfs_roc(state->inode,
3205 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3206 if (calldata->lr.roc) {
3207 calldata->arg.lr_args = &calldata->lr.arg;
3208 calldata->res.lr_res = &calldata->lr.res;
3209 }
3210 nfs_sb_active(calldata->inode->i_sb);
3211
3212 msg.rpc_argp = &calldata->arg;
3213 msg.rpc_resp = &calldata->res;
3214 task_setup_data.callback_data = calldata;
3215 task = rpc_run_task(&task_setup_data);
3216 if (IS_ERR(task))
3217 return PTR_ERR(task);
3218 status = 0;
3219 if (wait)
3220 status = rpc_wait_for_completion_task(task);
3221 rpc_put_task(task);
3222 return status;
3223out_free_calldata:
3224 kfree(calldata);
3225out:
3226 nfs4_put_open_state(state);
3227 nfs4_put_state_owner(sp);
3228 return status;
3229}
3230
3231static struct inode *
3232nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3233 int open_flags, struct iattr *attr, int *opened)
3234{
3235 struct nfs4_state *state;
3236 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3237
3238 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3239
3240
3241 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3242
3243 nfs4_label_release_security(label);
3244
3245 if (IS_ERR(state))
3246 return ERR_CAST(state);
3247 return state->inode;
3248}
3249
3250static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3251{
3252 if (ctx->state == NULL)
3253 return;
3254 if (is_sync)
3255 nfs4_close_sync(ctx->state, ctx->mode);
3256 else
3257 nfs4_close_state(ctx->state, ctx->mode);
3258}
3259
3260#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3261#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3262#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3263
3264static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3265{
3266 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3267 struct nfs4_server_caps_arg args = {
3268 .fhandle = fhandle,
3269 .bitmask = bitmask,
3270 };
3271 struct nfs4_server_caps_res res = {};
3272 struct rpc_message msg = {
3273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3274 .rpc_argp = &args,
3275 .rpc_resp = &res,
3276 };
3277 int status;
3278 int i;
3279
3280 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3281 FATTR4_WORD0_FH_EXPIRE_TYPE |
3282 FATTR4_WORD0_LINK_SUPPORT |
3283 FATTR4_WORD0_SYMLINK_SUPPORT |
3284 FATTR4_WORD0_ACLSUPPORT;
3285 if (minorversion)
3286 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3287
3288 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3289 if (status == 0) {
3290
3291 switch (minorversion) {
3292 case 0:
3293 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3294 res.attr_bitmask[2] = 0;
3295 break;
3296 case 1:
3297 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3298 break;
3299 case 2:
3300 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3301 }
3302 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3303 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3304 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3305 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3306 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3307 NFS_CAP_CTIME|NFS_CAP_MTIME|
3308 NFS_CAP_SECURITY_LABEL);
3309 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3310 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3311 server->caps |= NFS_CAP_ACLS;
3312 if (res.has_links != 0)
3313 server->caps |= NFS_CAP_HARDLINKS;
3314 if (res.has_symlinks != 0)
3315 server->caps |= NFS_CAP_SYMLINKS;
3316 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3317 server->caps |= NFS_CAP_FILEID;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3319 server->caps |= NFS_CAP_MODE;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3321 server->caps |= NFS_CAP_NLINK;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3323 server->caps |= NFS_CAP_OWNER;
3324 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3325 server->caps |= NFS_CAP_OWNER_GROUP;
3326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3327 server->caps |= NFS_CAP_ATIME;
3328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3329 server->caps |= NFS_CAP_CTIME;
3330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3331 server->caps |= NFS_CAP_MTIME;
3332#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3333 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3334 server->caps |= NFS_CAP_SECURITY_LABEL;
3335#endif
3336 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3337 sizeof(server->attr_bitmask));
3338 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3339
3340 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3341 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3342 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3343 server->cache_consistency_bitmask[2] = 0;
3344
3345
3346 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3347 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3348 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3349 sizeof(server->exclcreat_bitmask));
3350
3351 server->acl_bitmask = res.acl_bitmask;
3352 server->fh_expire_type = res.fh_expire_type;
3353 }
3354
3355 return status;
3356}
3357
3358int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3359{
3360 struct nfs4_exception exception = { };
3361 int err;
3362 do {
3363 err = nfs4_handle_exception(server,
3364 _nfs4_server_capabilities(server, fhandle),
3365 &exception);
3366 } while (exception.retry);
3367 return err;
3368}
3369
3370static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3371 struct nfs_fsinfo *info)
3372{
3373 u32 bitmask[3];
3374 struct nfs4_lookup_root_arg args = {
3375 .bitmask = bitmask,
3376 };
3377 struct nfs4_lookup_res res = {
3378 .server = server,
3379 .fattr = info->fattr,
3380 .fh = fhandle,
3381 };
3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3384 .rpc_argp = &args,
3385 .rpc_resp = &res,
3386 };
3387
3388 bitmask[0] = nfs4_fattr_bitmap[0];
3389 bitmask[1] = nfs4_fattr_bitmap[1];
3390
3391
3392
3393 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3394
3395 nfs_fattr_init(info->fattr);
3396 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3397}
3398
3399static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3400 struct nfs_fsinfo *info)
3401{
3402 struct nfs4_exception exception = { };
3403 int err;
3404 do {
3405 err = _nfs4_lookup_root(server, fhandle, info);
3406 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3407 switch (err) {
3408 case 0:
3409 case -NFS4ERR_WRONGSEC:
3410 goto out;
3411 default:
3412 err = nfs4_handle_exception(server, err, &exception);
3413 }
3414 } while (exception.retry);
3415out:
3416 return err;
3417}
3418
3419static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3420 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3421{
3422 struct rpc_auth_create_args auth_args = {
3423 .pseudoflavor = flavor,
3424 };
3425 struct rpc_auth *auth;
3426
3427 auth = rpcauth_create(&auth_args, server->client);
3428 if (IS_ERR(auth))
3429 return -EACCES;
3430 return nfs4_lookup_root(server, fhandle, info);
3431}
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3443 struct nfs_fsinfo *info)
3444{
3445
3446 static const rpc_authflavor_t flav_array[] = {
3447 RPC_AUTH_GSS_KRB5P,
3448 RPC_AUTH_GSS_KRB5I,
3449 RPC_AUTH_GSS_KRB5,
3450 RPC_AUTH_UNIX,
3451 RPC_AUTH_NULL,
3452 };
3453 int status = -EPERM;
3454 size_t i;
3455
3456 if (server->auth_info.flavor_len > 0) {
3457
3458 for (i = 0; i < server->auth_info.flavor_len; i++) {
3459 status = nfs4_lookup_root_sec(server, fhandle, info,
3460 server->auth_info.flavors[i]);
3461 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3462 continue;
3463 break;
3464 }
3465 } else {
3466
3467 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3468 status = nfs4_lookup_root_sec(server, fhandle, info,
3469 flav_array[i]);
3470 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3471 continue;
3472 break;
3473 }
3474 }
3475
3476
3477
3478
3479
3480
3481
3482
3483 if (status == -EACCES)
3484 status = -EPERM;
3485 return status;
3486}
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3498 struct nfs_fsinfo *info,
3499 bool auth_probe)
3500{
3501 int status = 0;
3502
3503 if (!auth_probe)
3504 status = nfs4_lookup_root(server, fhandle, info);
3505
3506 if (auth_probe || status == NFS4ERR_WRONGSEC)
3507 status = server->nfs_client->cl_mvops->find_root_sec(server,
3508 fhandle, info);
3509
3510 if (status == 0)
3511 status = nfs4_server_capabilities(server, fhandle);
3512 if (status == 0)
3513 status = nfs4_do_fsinfo(server, fhandle, info);
3514
3515 return nfs4_map_errors(status);
3516}
3517
3518static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3519 struct nfs_fsinfo *info)
3520{
3521 int error;
3522 struct nfs_fattr *fattr = info->fattr;
3523 struct nfs4_label *label = NULL;
3524
3525 error = nfs4_server_capabilities(server, mntfh);
3526 if (error < 0) {
3527 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3528 return error;
3529 }
3530
3531 label = nfs4_label_alloc(server, GFP_KERNEL);
3532 if (IS_ERR(label))
3533 return PTR_ERR(label);
3534
3535 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3536 if (error < 0) {
3537 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3538 goto err_free_label;
3539 }
3540
3541 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3542 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3543 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3544
3545err_free_label:
3546 nfs4_label_free(label);
3547
3548 return error;
3549}
3550
3551
3552
3553
3554
3555
3556static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3557 const struct qstr *name, struct nfs_fattr *fattr,
3558 struct nfs_fh *fhandle)
3559{
3560 int status = -ENOMEM;
3561 struct page *page = NULL;
3562 struct nfs4_fs_locations *locations = NULL;
3563
3564 page = alloc_page(GFP_KERNEL);
3565 if (page == NULL)
3566 goto out;
3567 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3568 if (locations == NULL)
3569 goto out;
3570
3571 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3572 if (status != 0)
3573 goto out;
3574
3575
3576
3577
3578
3579
3580 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3581 dprintk("%s: server did not return a different fsid for"
3582 " a referral at %s\n", __func__, name->name);
3583 status = -NFS4ERR_MOVED;
3584 goto out;
3585 }
3586
3587 nfs_fixup_referral_attributes(&locations->fattr);
3588
3589
3590 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3591 memset(fhandle, 0, sizeof(struct nfs_fh));
3592out:
3593 if (page)
3594 __free_page(page);
3595 kfree(locations);
3596 return status;
3597}
3598
3599static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3600 struct nfs_fattr *fattr, struct nfs4_label *label)
3601{
3602 struct nfs4_getattr_arg args = {
3603 .fh = fhandle,
3604 .bitmask = server->attr_bitmask,
3605 };
3606 struct nfs4_getattr_res res = {
3607 .fattr = fattr,
3608 .label = label,
3609 .server = server,
3610 };
3611 struct rpc_message msg = {
3612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3613 .rpc_argp = &args,
3614 .rpc_resp = &res,
3615 };
3616
3617 args.bitmask = nfs4_bitmask(server, label);
3618
3619 nfs_fattr_init(fattr);
3620 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3621}
3622
3623static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3624 struct nfs_fattr *fattr, struct nfs4_label *label)
3625{
3626 struct nfs4_exception exception = { };
3627 int err;
3628 do {
3629 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3630 trace_nfs4_getattr(server, fhandle, fattr, err);
3631 err = nfs4_handle_exception(server, err,
3632 &exception);
3633 } while (exception.retry);
3634 return err;
3635}
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654static int
3655nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3656 struct iattr *sattr)
3657{
3658 struct inode *inode = d_inode(dentry);
3659 struct rpc_cred *cred = NULL;
3660 struct nfs_open_context *ctx = NULL;
3661 struct nfs4_label *label = NULL;
3662 int status;
3663
3664 if (pnfs_ld_layoutret_on_setattr(inode) &&
3665 sattr->ia_valid & ATTR_SIZE &&
3666 sattr->ia_size < i_size_read(inode))
3667 pnfs_commit_and_return_layout(inode);
3668
3669 nfs_fattr_init(fattr);
3670
3671
3672 if (sattr->ia_valid & ATTR_OPEN)
3673 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3674
3675
3676 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3677 return 0;
3678
3679
3680 if (sattr->ia_valid & ATTR_FILE) {
3681
3682 ctx = nfs_file_open_context(sattr->ia_file);
3683 if (ctx)
3684 cred = ctx->cred;
3685 }
3686
3687 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3688 if (IS_ERR(label))
3689 return PTR_ERR(label);
3690
3691 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3692 if (status == 0) {
3693 nfs_setattr_update_inode(inode, sattr, fattr);
3694 nfs_setsecurity(inode, fattr, label);
3695 }
3696 nfs4_label_free(label);
3697 return status;
3698}
3699
3700static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3701 const struct qstr *name, struct nfs_fh *fhandle,
3702 struct nfs_fattr *fattr, struct nfs4_label *label)
3703{
3704 struct nfs_server *server = NFS_SERVER(dir);
3705 int status;
3706 struct nfs4_lookup_arg args = {
3707 .bitmask = server->attr_bitmask,
3708 .dir_fh = NFS_FH(dir),
3709 .name = name,
3710 };
3711 struct nfs4_lookup_res res = {
3712 .server = server,
3713 .fattr = fattr,
3714 .label = label,
3715 .fh = fhandle,
3716 };
3717 struct rpc_message msg = {
3718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3719 .rpc_argp = &args,
3720 .rpc_resp = &res,
3721 };
3722
3723 args.bitmask = nfs4_bitmask(server, label);
3724
3725 nfs_fattr_init(fattr);
3726
3727 dprintk("NFS call lookup %s\n", name->name);
3728 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3729 dprintk("NFS reply lookup: %d\n", status);
3730 return status;
3731}
3732
3733static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3734{
3735 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3736 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3737 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3738 fattr->nlink = 2;
3739}
3740
3741static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3742 const struct qstr *name, struct nfs_fh *fhandle,
3743 struct nfs_fattr *fattr, struct nfs4_label *label)
3744{
3745 struct nfs4_exception exception = { };
3746 struct rpc_clnt *client = *clnt;
3747 int err;
3748 do {
3749 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3750 trace_nfs4_lookup(dir, name, err);
3751 switch (err) {
3752 case -NFS4ERR_BADNAME:
3753 err = -ENOENT;
3754 goto out;
3755 case -NFS4ERR_MOVED:
3756 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3757 if (err == -NFS4ERR_MOVED)
3758 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3759 goto out;
3760 case -NFS4ERR_WRONGSEC:
3761 err = -EPERM;
3762 if (client != *clnt)
3763 goto out;
3764 client = nfs4_negotiate_security(client, dir, name);
3765 if (IS_ERR(client))
3766 return PTR_ERR(client);
3767
3768 exception.retry = 1;
3769 break;
3770 default:
3771 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3772 }
3773 } while (exception.retry);
3774
3775out:
3776 if (err == 0)
3777 *clnt = client;
3778 else if (client != *clnt)
3779 rpc_shutdown_client(client);
3780
3781 return err;
3782}
3783
3784static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3785 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3786 struct nfs4_label *label)
3787{
3788 int status;
3789 struct rpc_clnt *client = NFS_CLIENT(dir);
3790
3791 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3792 if (client != NFS_CLIENT(dir)) {
3793 rpc_shutdown_client(client);
3794 nfs_fixup_secinfo_attributes(fattr);
3795 }
3796 return status;
3797}
3798
3799struct rpc_clnt *
3800nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3801 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3802{
3803 struct rpc_clnt *client = NFS_CLIENT(dir);
3804 int status;
3805
3806 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3807 if (status < 0)
3808 return ERR_PTR(status);
3809 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3810}
3811
3812static int _nfs4_proc_lookupp(struct inode *inode,
3813 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3814 struct nfs4_label *label)
3815{
3816 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3817 struct nfs_server *server = NFS_SERVER(inode);
3818 int status;
3819 struct nfs4_lookupp_arg args = {
3820 .bitmask = server->attr_bitmask,
3821 .fh = NFS_FH(inode),
3822 };
3823 struct nfs4_lookupp_res res = {
3824 .server = server,
3825 .fattr = fattr,
3826 .label = label,
3827 .fh = fhandle,
3828 };
3829 struct rpc_message msg = {
3830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3831 .rpc_argp = &args,
3832 .rpc_resp = &res,
3833 };
3834
3835 args.bitmask = nfs4_bitmask(server, label);
3836
3837 nfs_fattr_init(fattr);
3838
3839 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3840 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3841 &res.seq_res, 0);
3842 dprintk("NFS reply lookupp: %d\n", status);
3843 return status;
3844}
3845
3846static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3847 struct nfs_fattr *fattr, struct nfs4_label *label)
3848{
3849 struct nfs4_exception exception = { };
3850 int err;
3851 do {
3852 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3853 trace_nfs4_lookupp(inode, err);
3854 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3855 &exception);
3856 } while (exception.retry);
3857 return err;
3858}
3859
3860static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3861{
3862 struct nfs_server *server = NFS_SERVER(inode);
3863 struct nfs4_accessargs args = {
3864 .fh = NFS_FH(inode),
3865 .bitmask = server->cache_consistency_bitmask,
3866 };
3867 struct nfs4_accessres res = {
3868 .server = server,
3869 };
3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3872 .rpc_argp = &args,
3873 .rpc_resp = &res,
3874 .rpc_cred = entry->cred,
3875 };
3876 int mode = entry->mask;
3877 int status = 0;
3878
3879
3880
3881
3882 if (mode & MAY_READ)
3883 args.access |= NFS4_ACCESS_READ;
3884 if (S_ISDIR(inode->i_mode)) {
3885 if (mode & MAY_WRITE)
3886 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3887 if (mode & MAY_EXEC)
3888 args.access |= NFS4_ACCESS_LOOKUP;
3889 } else {
3890 if (mode & MAY_WRITE)
3891 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3892 if (mode & MAY_EXEC)
3893 args.access |= NFS4_ACCESS_EXECUTE;
3894 }
3895
3896 res.fattr = nfs_alloc_fattr();
3897 if (res.fattr == NULL)
3898 return -ENOMEM;
3899
3900 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3901 if (!status) {
3902 nfs_access_set_mask(entry, res.access);
3903 nfs_refresh_inode(inode, res.fattr);
3904 }
3905 nfs_free_fattr(res.fattr);
3906 return status;
3907}
3908
3909static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3910{
3911 struct nfs4_exception exception = { };
3912 int err;
3913 do {
3914 err = _nfs4_proc_access(inode, entry);
3915 trace_nfs4_access(inode, err);
3916 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3917 &exception);
3918 } while (exception.retry);
3919 return err;
3920}
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3945 unsigned int pgbase, unsigned int pglen)
3946{
3947 struct nfs4_readlink args = {
3948 .fh = NFS_FH(inode),
3949 .pgbase = pgbase,
3950 .pglen = pglen,
3951 .pages = &page,
3952 };
3953 struct nfs4_readlink_res res;
3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3956 .rpc_argp = &args,
3957 .rpc_resp = &res,
3958 };
3959
3960 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3961}
3962
3963static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3964 unsigned int pgbase, unsigned int pglen)
3965{
3966 struct nfs4_exception exception = { };
3967 int err;
3968 do {
3969 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3970 trace_nfs4_readlink(inode, err);
3971 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3972 &exception);
3973 } while (exception.retry);
3974 return err;
3975}
3976
3977
3978
3979
3980static int
3981nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3982 int flags)
3983{
3984 struct nfs_server *server = NFS_SERVER(dir);
3985 struct nfs4_label l, *ilabel = NULL;
3986 struct nfs_open_context *ctx;
3987 struct nfs4_state *state;
3988 int status = 0;
3989
3990 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
3991 if (IS_ERR(ctx))
3992 return PTR_ERR(ctx);
3993
3994 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3995
3996 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3997 sattr->ia_mode &= ~current_umask();
3998 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3999 if (IS_ERR(state)) {
4000 status = PTR_ERR(state);
4001 goto out;
4002 }
4003out:
4004 nfs4_label_release_security(ilabel);
4005 put_nfs_open_context(ctx);
4006 return status;
4007}
4008
4009static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4010{
4011 struct nfs_server *server = NFS_SERVER(dir);
4012 struct nfs_removeargs args = {
4013 .fh = NFS_FH(dir),
4014 .name = *name,
4015 };
4016 struct nfs_removeres res = {
4017 .server = server,
4018 };
4019 struct rpc_message msg = {
4020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4021 .rpc_argp = &args,
4022 .rpc_resp = &res,
4023 };
4024 unsigned long timestamp = jiffies;
4025 int status;
4026
4027 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4028 if (status == 0)
4029 update_changeattr(dir, &res.cinfo, timestamp);
4030 return status;
4031}
4032
4033static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4034{
4035 struct nfs4_exception exception = { };
4036 int err;
4037 do {
4038 err = _nfs4_proc_remove(dir, name);
4039 trace_nfs4_remove(dir, name, err);
4040 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4041 &exception);
4042 } while (exception.retry);
4043 return err;
4044}
4045
4046static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
4047{
4048 struct nfs_server *server = NFS_SERVER(dir);
4049 struct nfs_removeargs *args = msg->rpc_argp;
4050 struct nfs_removeres *res = msg->rpc_resp;
4051
4052 res->server = server;
4053 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4054 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4055
4056 nfs_fattr_init(res->dir_attr);
4057}
4058
4059static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4060{
4061 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4062 &data->args.seq_args,
4063 &data->res.seq_res,
4064 task);
4065}
4066
4067static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4068{
4069 struct nfs_unlinkdata *data = task->tk_calldata;
4070 struct nfs_removeres *res = &data->res;
4071
4072 if (!nfs4_sequence_done(task, &res->seq_res))
4073 return 0;
4074 if (nfs4_async_handle_error(task, res->server, NULL,
4075 &data->timeout) == -EAGAIN)
4076 return 0;
4077 if (task->tk_status == 0)
4078 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4079 return 1;
4080}
4081
4082static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4083{
4084 struct nfs_server *server = NFS_SERVER(dir);
4085 struct nfs_renameargs *arg = msg->rpc_argp;
4086 struct nfs_renameres *res = msg->rpc_resp;
4087
4088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4089 res->server = server;
4090 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4091}
4092
4093static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4094{
4095 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4096 &data->args.seq_args,
4097 &data->res.seq_res,
4098 task);
4099}
4100
4101static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4102 struct inode *new_dir)
4103{
4104 struct nfs_renamedata *data = task->tk_calldata;
4105 struct nfs_renameres *res = &data->res;
4106
4107 if (!nfs4_sequence_done(task, &res->seq_res))
4108 return 0;
4109 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4110 return 0;
4111
4112 if (task->tk_status == 0) {
4113 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4114 if (new_dir != old_dir)
4115 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4116 }
4117 return 1;
4118}
4119
4120static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4121{
4122 struct nfs_server *server = NFS_SERVER(inode);
4123 struct nfs4_link_arg arg = {
4124 .fh = NFS_FH(inode),
4125 .dir_fh = NFS_FH(dir),
4126 .name = name,
4127 .bitmask = server->attr_bitmask,
4128 };
4129 struct nfs4_link_res res = {
4130 .server = server,
4131 .label = NULL,
4132 };
4133 struct rpc_message msg = {
4134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4135 .rpc_argp = &arg,
4136 .rpc_resp = &res,
4137 };
4138 int status = -ENOMEM;
4139
4140 res.fattr = nfs_alloc_fattr();
4141 if (res.fattr == NULL)
4142 goto out;
4143
4144 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4145 if (IS_ERR(res.label)) {
4146 status = PTR_ERR(res.label);
4147 goto out;
4148 }
4149 arg.bitmask = nfs4_bitmask(server, res.label);
4150
4151 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4152 if (!status) {
4153 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4154 status = nfs_post_op_update_inode(inode, res.fattr);
4155 if (!status)
4156 nfs_setsecurity(inode, res.fattr, res.label);
4157 }
4158
4159
4160 nfs4_label_free(res.label);
4161
4162out:
4163 nfs_free_fattr(res.fattr);
4164 return status;
4165}
4166
4167static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4168{
4169 struct nfs4_exception exception = { };
4170 int err;
4171 do {
4172 err = nfs4_handle_exception(NFS_SERVER(inode),
4173 _nfs4_proc_link(inode, dir, name),
4174 &exception);
4175 } while (exception.retry);
4176 return err;
4177}
4178
4179struct nfs4_createdata {
4180 struct rpc_message msg;
4181 struct nfs4_create_arg arg;
4182 struct nfs4_create_res res;
4183 struct nfs_fh fh;
4184 struct nfs_fattr fattr;
4185 struct nfs4_label *label;
4186};
4187
4188static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4189 const struct qstr *name, struct iattr *sattr, u32 ftype)
4190{
4191 struct nfs4_createdata *data;
4192
4193 data = kzalloc(sizeof(*data), GFP_KERNEL);
4194 if (data != NULL) {
4195 struct nfs_server *server = NFS_SERVER(dir);
4196
4197 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4198 if (IS_ERR(data->label))
4199 goto out_free;
4200
4201 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4202 data->msg.rpc_argp = &data->arg;
4203 data->msg.rpc_resp = &data->res;
4204 data->arg.dir_fh = NFS_FH(dir);
4205 data->arg.server = server;
4206 data->arg.name = name;
4207 data->arg.attrs = sattr;
4208 data->arg.ftype = ftype;
4209 data->arg.bitmask = nfs4_bitmask(server, data->label);
4210 data->arg.umask = current_umask();
4211 data->res.server = server;
4212 data->res.fh = &data->fh;
4213 data->res.fattr = &data->fattr;
4214 data->res.label = data->label;
4215 nfs_fattr_init(data->res.fattr);
4216 }
4217 return data;
4218out_free:
4219 kfree(data);
4220 return NULL;
4221}
4222
4223static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4224{
4225 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4226 &data->arg.seq_args, &data->res.seq_res, 1);
4227 if (status == 0) {
4228 update_changeattr(dir, &data->res.dir_cinfo,
4229 data->res.fattr->time_start);
4230 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4231 }
4232 return status;
4233}
4234
4235static void nfs4_free_createdata(struct nfs4_createdata *data)
4236{
4237 nfs4_label_free(data->label);
4238 kfree(data);
4239}
4240
4241static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4242 struct page *page, unsigned int len, struct iattr *sattr,
4243 struct nfs4_label *label)
4244{
4245 struct nfs4_createdata *data;
4246 int status = -ENAMETOOLONG;
4247
4248 if (len > NFS4_MAXPATHLEN)
4249 goto out;
4250
4251 status = -ENOMEM;
4252 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4253 if (data == NULL)
4254 goto out;
4255
4256 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4257 data->arg.u.symlink.pages = &page;
4258 data->arg.u.symlink.len = len;
4259 data->arg.label = label;
4260
4261 status = nfs4_do_create(dir, dentry, data);
4262
4263 nfs4_free_createdata(data);
4264out:
4265 return status;
4266}
4267
4268static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4269 struct page *page, unsigned int len, struct iattr *sattr)
4270{
4271 struct nfs4_exception exception = { };
4272 struct nfs4_label l, *label = NULL;
4273 int err;
4274
4275 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4276
4277 do {
4278 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4279 trace_nfs4_symlink(dir, &dentry->d_name, err);
4280 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4281 &exception);
4282 } while (exception.retry);
4283
4284 nfs4_label_release_security(label);
4285 return err;
4286}
4287
4288static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4289 struct iattr *sattr, struct nfs4_label *label)
4290{
4291 struct nfs4_createdata *data;
4292 int status = -ENOMEM;
4293
4294 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4295 if (data == NULL)
4296 goto out;
4297
4298 data->arg.label = label;
4299 status = nfs4_do_create(dir, dentry, data);
4300
4301 nfs4_free_createdata(data);
4302out:
4303 return status;
4304}
4305
4306static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4307 struct iattr *sattr)
4308{
4309 struct nfs_server *server = NFS_SERVER(dir);
4310 struct nfs4_exception exception = { };
4311 struct nfs4_label l, *label = NULL;
4312 int err;
4313
4314 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4315
4316 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4317 sattr->ia_mode &= ~current_umask();
4318 do {
4319 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4320 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4321 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4322 &exception);
4323 } while (exception.retry);
4324 nfs4_label_release_security(label);
4325
4326 return err;
4327}
4328
4329static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4330 u64 cookie, struct page **pages, unsigned int count, bool plus)
4331{
4332 struct inode *dir = d_inode(dentry);
4333 struct nfs4_readdir_arg args = {
4334 .fh = NFS_FH(dir),
4335 .pages = pages,
4336 .pgbase = 0,
4337 .count = count,
4338 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4339 .plus = plus,
4340 };
4341 struct nfs4_readdir_res res;
4342 struct rpc_message msg = {
4343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4344 .rpc_argp = &args,
4345 .rpc_resp = &res,
4346 .rpc_cred = cred,
4347 };
4348 int status;
4349
4350 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4351 dentry,
4352 (unsigned long long)cookie);
4353 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4354 res.pgbase = args.pgbase;
4355 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4356 if (status >= 0) {
4357 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4358 status += args.pgbase;
4359 }
4360
4361 nfs_invalidate_atime(dir);
4362
4363 dprintk("%s: returns %d\n", __func__, status);
4364 return status;
4365}
4366
4367static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4368 u64 cookie, struct page **pages, unsigned int count, bool plus)
4369{
4370 struct nfs4_exception exception = { };
4371 int err;
4372 do {
4373 err = _nfs4_proc_readdir(dentry, cred, cookie,
4374 pages, count, plus);
4375 trace_nfs4_readdir(d_inode(dentry), err);
4376 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4377 &exception);
4378 } while (exception.retry);
4379 return err;
4380}
4381
4382static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4383 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4384{
4385 struct nfs4_createdata *data;
4386 int mode = sattr->ia_mode;
4387 int status = -ENOMEM;
4388
4389 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4390 if (data == NULL)
4391 goto out;
4392
4393 if (S_ISFIFO(mode))
4394 data->arg.ftype = NF4FIFO;
4395 else if (S_ISBLK(mode)) {
4396 data->arg.ftype = NF4BLK;
4397 data->arg.u.device.specdata1 = MAJOR(rdev);
4398 data->arg.u.device.specdata2 = MINOR(rdev);
4399 }
4400 else if (S_ISCHR(mode)) {
4401 data->arg.ftype = NF4CHR;
4402 data->arg.u.device.specdata1 = MAJOR(rdev);
4403 data->arg.u.device.specdata2 = MINOR(rdev);
4404 } else if (!S_ISSOCK(mode)) {
4405 status = -EINVAL;
4406 goto out_free;
4407 }
4408
4409 data->arg.label = label;
4410 status = nfs4_do_create(dir, dentry, data);
4411out_free:
4412 nfs4_free_createdata(data);
4413out:
4414 return status;
4415}
4416
4417static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4418 struct iattr *sattr, dev_t rdev)
4419{
4420 struct nfs_server *server = NFS_SERVER(dir);
4421 struct nfs4_exception exception = { };
4422 struct nfs4_label l, *label = NULL;
4423 int err;
4424
4425 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4426
4427 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4428 sattr->ia_mode &= ~current_umask();
4429 do {
4430 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4431 trace_nfs4_mknod(dir, &dentry->d_name, err);
4432 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4433 &exception);
4434 } while (exception.retry);
4435
4436 nfs4_label_release_security(label);
4437
4438 return err;
4439}
4440
4441static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4442 struct nfs_fsstat *fsstat)
4443{
4444 struct nfs4_statfs_arg args = {
4445 .fh = fhandle,
4446 .bitmask = server->attr_bitmask,
4447 };
4448 struct nfs4_statfs_res res = {
4449 .fsstat = fsstat,
4450 };
4451 struct rpc_message msg = {
4452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4453 .rpc_argp = &args,
4454 .rpc_resp = &res,
4455 };
4456
4457 nfs_fattr_init(fsstat->fattr);
4458 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4459}
4460
4461static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4462{
4463 struct nfs4_exception exception = { };
4464 int err;
4465 do {
4466 err = nfs4_handle_exception(server,
4467 _nfs4_proc_statfs(server, fhandle, fsstat),
4468 &exception);
4469 } while (exception.retry);
4470 return err;
4471}
4472
4473static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4474 struct nfs_fsinfo *fsinfo)
4475{
4476 struct nfs4_fsinfo_arg args = {
4477 .fh = fhandle,
4478 .bitmask = server->attr_bitmask,
4479 };
4480 struct nfs4_fsinfo_res res = {
4481 .fsinfo = fsinfo,
4482 };
4483 struct rpc_message msg = {
4484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4485 .rpc_argp = &args,
4486 .rpc_resp = &res,
4487 };
4488
4489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4490}
4491
4492static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4493{
4494 struct nfs4_exception exception = { };
4495 unsigned long now = jiffies;
4496 int err;
4497
4498 do {
4499 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4500 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4501 if (err == 0) {
4502 nfs4_set_lease_period(server->nfs_client,
4503 fsinfo->lease_time * HZ,
4504 now);
4505 break;
4506 }
4507 err = nfs4_handle_exception(server, err, &exception);
4508 } while (exception.retry);
4509 return err;
4510}
4511
4512static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4513{
4514 int error;
4515
4516 nfs_fattr_init(fsinfo->fattr);
4517 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4518 if (error == 0) {
4519
4520 server->pnfs_blksize = fsinfo->blksize;
4521 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4522 }
4523
4524 return error;
4525}
4526
4527static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4528 struct nfs_pathconf *pathconf)
4529{
4530 struct nfs4_pathconf_arg args = {
4531 .fh = fhandle,
4532 .bitmask = server->attr_bitmask,
4533 };
4534 struct nfs4_pathconf_res res = {
4535 .pathconf = pathconf,
4536 };
4537 struct rpc_message msg = {
4538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4539 .rpc_argp = &args,
4540 .rpc_resp = &res,
4541 };
4542
4543
4544 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4545 memset(pathconf, 0, sizeof(*pathconf));
4546 return 0;
4547 }
4548
4549 nfs_fattr_init(pathconf->fattr);
4550 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4551}
4552
4553static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4554 struct nfs_pathconf *pathconf)
4555{
4556 struct nfs4_exception exception = { };
4557 int err;
4558
4559 do {
4560 err = nfs4_handle_exception(server,
4561 _nfs4_proc_pathconf(server, fhandle, pathconf),
4562 &exception);
4563 } while (exception.retry);
4564 return err;
4565}
4566
4567int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4568 const struct nfs_open_context *ctx,
4569 const struct nfs_lock_context *l_ctx,
4570 fmode_t fmode)
4571{
4572 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4573}
4574EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4575
4576static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4577 const struct nfs_open_context *ctx,
4578 const struct nfs_lock_context *l_ctx,
4579 fmode_t fmode)
4580{
4581 nfs4_stateid current_stateid;
4582
4583
4584 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4585 return true;
4586 return nfs4_stateid_match(stateid, ¤t_stateid);
4587}
4588
4589static bool nfs4_error_stateid_expired(int err)
4590{
4591 switch (err) {
4592 case -NFS4ERR_DELEG_REVOKED:
4593 case -NFS4ERR_ADMIN_REVOKED:
4594 case -NFS4ERR_BAD_STATEID:
4595 case -NFS4ERR_STALE_STATEID:
4596 case -NFS4ERR_OLD_STATEID:
4597 case -NFS4ERR_OPENMODE:
4598 case -NFS4ERR_EXPIRED:
4599 return true;
4600 }
4601 return false;
4602}
4603
4604static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4605{
4606 struct nfs_server *server = NFS_SERVER(hdr->inode);
4607
4608 trace_nfs4_read(hdr, task->tk_status);
4609 if (task->tk_status < 0) {
4610 struct nfs4_exception exception = {
4611 .inode = hdr->inode,
4612 .state = hdr->args.context->state,
4613 .stateid = &hdr->args.stateid,
4614 };
4615 task->tk_status = nfs4_async_handle_exception(task,
4616 server, task->tk_status, &exception);
4617 if (exception.retry) {
4618 rpc_restart_call_prepare(task);
4619 return -EAGAIN;
4620 }
4621 }
4622
4623 if (task->tk_status > 0)
4624 renew_lease(server, hdr->timestamp);
4625 return 0;
4626}
4627
4628static bool nfs4_read_stateid_changed(struct rpc_task *task,
4629 struct nfs_pgio_args *args)
4630{
4631
4632 if (!nfs4_error_stateid_expired(task->tk_status) ||
4633 nfs4_stateid_is_current(&args->stateid,
4634 args->context,
4635 args->lock_context,
4636 FMODE_READ))
4637 return false;
4638 rpc_restart_call_prepare(task);
4639 return true;
4640}
4641
4642static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4643{
4644
4645 dprintk("--> %s\n", __func__);
4646
4647 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4648 return -EAGAIN;
4649 if (nfs4_read_stateid_changed(task, &hdr->args))
4650 return -EAGAIN;
4651 if (task->tk_status > 0)
4652 nfs_invalidate_atime(hdr->inode);
4653 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4654 nfs4_read_done_cb(task, hdr);
4655}
4656
4657static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4658 struct rpc_message *msg)
4659{
4660 hdr->timestamp = jiffies;
4661 if (!hdr->pgio_done_cb)
4662 hdr->pgio_done_cb = nfs4_read_done_cb;
4663 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4664 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4665}
4666
4667static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4668 struct nfs_pgio_header *hdr)
4669{
4670 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4671 &hdr->args.seq_args,
4672 &hdr->res.seq_res,
4673 task))
4674 return 0;
4675 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4676 hdr->args.lock_context,
4677 hdr->rw_mode) == -EIO)
4678 return -EIO;
4679 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4680 return -EIO;
4681 return 0;
4682}
4683
4684static int nfs4_write_done_cb(struct rpc_task *task,
4685 struct nfs_pgio_header *hdr)
4686{
4687 struct inode *inode = hdr->inode;
4688
4689 trace_nfs4_write(hdr, task->tk_status);
4690 if (task->tk_status < 0) {
4691 struct nfs4_exception exception = {
4692 .inode = hdr->inode,
4693 .state = hdr->args.context->state,
4694 .stateid = &hdr->args.stateid,
4695 };
4696 task->tk_status = nfs4_async_handle_exception(task,
4697 NFS_SERVER(inode), task->tk_status,
4698 &exception);
4699 if (exception.retry) {
4700 rpc_restart_call_prepare(task);
4701 return -EAGAIN;
4702 }
4703 }
4704 if (task->tk_status >= 0) {
4705 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4706 nfs_writeback_update_inode(hdr);
4707 }
4708 return 0;
4709}
4710
4711static bool nfs4_write_stateid_changed(struct rpc_task *task,
4712 struct nfs_pgio_args *args)
4713{
4714
4715 if (!nfs4_error_stateid_expired(task->tk_status) ||
4716 nfs4_stateid_is_current(&args->stateid,
4717 args->context,
4718 args->lock_context,
4719 FMODE_WRITE))
4720 return false;
4721 rpc_restart_call_prepare(task);
4722 return true;
4723}
4724
4725static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4726{
4727 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4728 return -EAGAIN;
4729 if (nfs4_write_stateid_changed(task, &hdr->args))
4730 return -EAGAIN;
4731 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4732 nfs4_write_done_cb(task, hdr);
4733}
4734
4735static
4736bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4737{
4738
4739 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4740 return false;
4741
4742
4743
4744 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4745}
4746
4747static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4748 struct rpc_message *msg)
4749{
4750 struct nfs_server *server = NFS_SERVER(hdr->inode);
4751
4752 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4753 hdr->args.bitmask = NULL;
4754 hdr->res.fattr = NULL;
4755 } else
4756 hdr->args.bitmask = server->cache_consistency_bitmask;
4757
4758 if (!hdr->pgio_done_cb)
4759 hdr->pgio_done_cb = nfs4_write_done_cb;
4760 hdr->res.server = server;
4761 hdr->timestamp = jiffies;
4762
4763 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4764 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4765}
4766
4767static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4768{
4769 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4770 &data->args.seq_args,
4771 &data->res.seq_res,
4772 task);
4773}
4774
4775static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4776{
4777 struct inode *inode = data->inode;
4778
4779 trace_nfs4_commit(data, task->tk_status);
4780 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4781 NULL, NULL) == -EAGAIN) {
4782 rpc_restart_call_prepare(task);
4783 return -EAGAIN;
4784 }
4785 return 0;
4786}
4787
4788static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4789{
4790 if (!nfs4_sequence_done(task, &data->res.seq_res))
4791 return -EAGAIN;
4792 return data->commit_done_cb(task, data);
4793}
4794
4795static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4796{
4797 struct nfs_server *server = NFS_SERVER(data->inode);
4798
4799 if (data->commit_done_cb == NULL)
4800 data->commit_done_cb = nfs4_commit_done_cb;
4801 data->res.server = server;
4802 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4803 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4804}
4805
4806struct nfs4_renewdata {
4807 struct nfs_client *client;
4808 unsigned long timestamp;
4809};
4810
4811
4812
4813
4814
4815static void nfs4_renew_release(void *calldata)
4816{
4817 struct nfs4_renewdata *data = calldata;
4818 struct nfs_client *clp = data->client;
4819
4820 if (atomic_read(&clp->cl_count) > 1)
4821 nfs4_schedule_state_renewal(clp);
4822 nfs_put_client(clp);
4823 kfree(data);
4824}
4825
4826static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4827{
4828 struct nfs4_renewdata *data = calldata;
4829 struct nfs_client *clp = data->client;
4830 unsigned long timestamp = data->timestamp;
4831
4832 trace_nfs4_renew_async(clp, task->tk_status);
4833 switch (task->tk_status) {
4834 case 0:
4835 break;
4836 case -NFS4ERR_LEASE_MOVED:
4837 nfs4_schedule_lease_moved_recovery(clp);
4838 break;
4839 default:
4840
4841 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4842 return;
4843 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4844 nfs4_schedule_lease_recovery(clp);
4845 return;
4846 }
4847 nfs4_schedule_path_down_recovery(clp);
4848 }
4849 do_renew_lease(clp, timestamp);
4850}
4851
4852static const struct rpc_call_ops nfs4_renew_ops = {
4853 .rpc_call_done = nfs4_renew_done,
4854 .rpc_release = nfs4_renew_release,
4855};
4856
4857static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4858{
4859 struct rpc_message msg = {
4860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4861 .rpc_argp = clp,
4862 .rpc_cred = cred,
4863 };
4864 struct nfs4_renewdata *data;
4865
4866 if (renew_flags == 0)
4867 return 0;
4868 if (!atomic_inc_not_zero(&clp->cl_count))
4869 return -EIO;
4870 data = kmalloc(sizeof(*data), GFP_NOFS);
4871 if (data == NULL) {
4872 nfs_put_client(clp);
4873 return -ENOMEM;
4874 }
4875 data->client = clp;
4876 data->timestamp = jiffies;
4877 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4878 &nfs4_renew_ops, data);
4879}
4880
4881static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4882{
4883 struct rpc_message msg = {
4884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4885 .rpc_argp = clp,
4886 .rpc_cred = cred,
4887 };
4888 unsigned long now = jiffies;
4889 int status;
4890
4891 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4892 if (status < 0)
4893 return status;
4894 do_renew_lease(clp, now);
4895 return 0;
4896}
4897
4898static inline int nfs4_server_supports_acls(struct nfs_server *server)
4899{
4900 return server->caps & NFS_CAP_ACLS;
4901}
4902
4903
4904
4905
4906
4907#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4908
4909static int buf_to_pages_noslab(const void *buf, size_t buflen,
4910 struct page **pages)
4911{
4912 struct page *newpage, **spages;
4913 int rc = 0;
4914 size_t len;
4915 spages = pages;
4916
4917 do {
4918 len = min_t(size_t, PAGE_SIZE, buflen);
4919 newpage = alloc_page(GFP_KERNEL);
4920
4921 if (newpage == NULL)
4922 goto unwind;
4923 memcpy(page_address(newpage), buf, len);
4924 buf += len;
4925 buflen -= len;
4926 *pages++ = newpage;
4927 rc++;
4928 } while (buflen != 0);
4929
4930 return rc;
4931
4932unwind:
4933 for(; rc > 0; rc--)
4934 __free_page(spages[rc-1]);
4935 return -ENOMEM;
4936}
4937
4938struct nfs4_cached_acl {
4939 int cached;
4940 size_t len;
4941 char data[0];
4942};
4943
4944static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4945{
4946 struct nfs_inode *nfsi = NFS_I(inode);
4947
4948 spin_lock(&inode->i_lock);
4949 kfree(nfsi->nfs4_acl);
4950 nfsi->nfs4_acl = acl;
4951 spin_unlock(&inode->i_lock);
4952}
4953
4954static void nfs4_zap_acl_attr(struct inode *inode)
4955{
4956 nfs4_set_cached_acl(inode, NULL);
4957}
4958
4959static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4960{
4961 struct nfs_inode *nfsi = NFS_I(inode);
4962 struct nfs4_cached_acl *acl;
4963 int ret = -ENOENT;
4964
4965 spin_lock(&inode->i_lock);
4966 acl = nfsi->nfs4_acl;
4967 if (acl == NULL)
4968 goto out;
4969 if (buf == NULL)
4970 goto out_len;
4971 if (acl->cached == 0)
4972 goto out;
4973 ret = -ERANGE;
4974 if (acl->len > buflen)
4975 goto out;
4976 memcpy(buf, acl->data, acl->len);
4977out_len:
4978 ret = acl->len;
4979out:
4980 spin_unlock(&inode->i_lock);
4981 return ret;
4982}
4983
4984static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4985{
4986 struct nfs4_cached_acl *acl;
4987 size_t buflen = sizeof(*acl) + acl_len;
4988
4989 if (buflen <= PAGE_SIZE) {
4990 acl = kmalloc(buflen, GFP_KERNEL);
4991 if (acl == NULL)
4992 goto out;
4993 acl->cached = 1;
4994 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4995 } else {
4996 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4997 if (acl == NULL)
4998 goto out;
4999 acl->cached = 0;
5000 }
5001 acl->len = acl_len;
5002out:
5003 nfs4_set_cached_acl(inode, acl);
5004}
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5017{
5018 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
5019 struct nfs_getaclargs args = {
5020 .fh = NFS_FH(inode),
5021 .acl_pages = pages,
5022 .acl_len = buflen,
5023 };
5024 struct nfs_getaclres res = {
5025 .acl_len = buflen,
5026 };
5027 struct rpc_message msg = {
5028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5029 .rpc_argp = &args,
5030 .rpc_resp = &res,
5031 };
5032 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5033 int ret = -ENOMEM, i;
5034
5035 if (npages > ARRAY_SIZE(pages))
5036 return -ERANGE;
5037
5038 for (i = 0; i < npages; i++) {
5039 pages[i] = alloc_page(GFP_KERNEL);
5040 if (!pages[i])
5041 goto out_free;
5042 }
5043
5044
5045 res.acl_scratch = alloc_page(GFP_KERNEL);
5046 if (!res.acl_scratch)
5047 goto out_free;
5048
5049 args.acl_len = npages * PAGE_SIZE;
5050
5051 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5052 __func__, buf, buflen, npages, args.acl_len);
5053 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5054 &msg, &args.seq_args, &res.seq_res, 0);
5055 if (ret)
5056 goto out_free;
5057
5058
5059 if (res.acl_flags & NFS4_ACL_TRUNC) {
5060
5061 if (buf == NULL)
5062 goto out_ok;
5063 ret = -ERANGE;
5064 goto out_free;
5065 }
5066 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5067 if (buf) {
5068 if (res.acl_len > buflen) {
5069 ret = -ERANGE;
5070 goto out_free;
5071 }
5072 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5073 }
5074out_ok:
5075 ret = res.acl_len;
5076out_free:
5077 for (i = 0; i < npages; i++)
5078 if (pages[i])
5079 __free_page(pages[i]);
5080 if (res.acl_scratch)
5081 __free_page(res.acl_scratch);
5082 return ret;
5083}
5084
5085static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5086{
5087 struct nfs4_exception exception = { };
5088 ssize_t ret;
5089 do {
5090 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5091 trace_nfs4_get_acl(inode, ret);
5092 if (ret >= 0)
5093 break;
5094 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5095 } while (exception.retry);
5096 return ret;
5097}
5098
5099static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5100{
5101 struct nfs_server *server = NFS_SERVER(inode);
5102 int ret;
5103
5104 if (!nfs4_server_supports_acls(server))
5105 return -EOPNOTSUPP;
5106 ret = nfs_revalidate_inode(server, inode);
5107 if (ret < 0)
5108 return ret;
5109 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5110 nfs_zap_acl_cache(inode);
5111 ret = nfs4_read_cached_acl(inode, buf, buflen);
5112 if (ret != -ENOENT)
5113
5114
5115 return ret;
5116 return nfs4_get_acl_uncached(inode, buf, buflen);
5117}
5118
5119static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5120{
5121 struct nfs_server *server = NFS_SERVER(inode);
5122 struct page *pages[NFS4ACL_MAXPAGES];
5123 struct nfs_setaclargs arg = {
5124 .fh = NFS_FH(inode),
5125 .acl_pages = pages,
5126 .acl_len = buflen,
5127 };
5128 struct nfs_setaclres res;
5129 struct rpc_message msg = {
5130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5131 .rpc_argp = &arg,
5132 .rpc_resp = &res,
5133 };
5134 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5135 int ret, i;
5136
5137 if (!nfs4_server_supports_acls(server))
5138 return -EOPNOTSUPP;
5139 if (npages > ARRAY_SIZE(pages))
5140 return -ERANGE;
5141 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5142 if (i < 0)
5143 return i;
5144 nfs4_inode_return_delegation(inode);
5145 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5146
5147
5148
5149
5150
5151 for (; i > 0; i--)
5152 put_page(pages[i-1]);
5153
5154
5155
5156
5157
5158 spin_lock(&inode->i_lock);
5159 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5160 spin_unlock(&inode->i_lock);
5161 nfs_access_zap_cache(inode);
5162 nfs_zap_acl_cache(inode);
5163 return ret;
5164}
5165
5166static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5167{
5168 struct nfs4_exception exception = { };
5169 int err;
5170 do {
5171 err = __nfs4_proc_set_acl(inode, buf, buflen);
5172 trace_nfs4_set_acl(inode, err);
5173 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5174 &exception);
5175 } while (exception.retry);
5176 return err;
5177}
5178
5179#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5180static int _nfs4_get_security_label(struct inode *inode, void *buf,
5181 size_t buflen)
5182{
5183 struct nfs_server *server = NFS_SERVER(inode);
5184 struct nfs_fattr fattr;
5185 struct nfs4_label label = {0, 0, buflen, buf};
5186
5187 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5188 struct nfs4_getattr_arg arg = {
5189 .fh = NFS_FH(inode),
5190 .bitmask = bitmask,
5191 };
5192 struct nfs4_getattr_res res = {
5193 .fattr = &fattr,
5194 .label = &label,
5195 .server = server,
5196 };
5197 struct rpc_message msg = {
5198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5199 .rpc_argp = &arg,
5200 .rpc_resp = &res,
5201 };
5202 int ret;
5203
5204 nfs_fattr_init(&fattr);
5205
5206 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5207 if (ret)
5208 return ret;
5209 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5210 return -ENOENT;
5211 if (buflen < label.len)
5212 return -ERANGE;
5213 return 0;
5214}
5215
5216static int nfs4_get_security_label(struct inode *inode, void *buf,
5217 size_t buflen)
5218{
5219 struct nfs4_exception exception = { };
5220 int err;
5221
5222 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5223 return -EOPNOTSUPP;
5224
5225 do {
5226 err = _nfs4_get_security_label(inode, buf, buflen);
5227 trace_nfs4_get_security_label(inode, err);
5228 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5229 &exception);
5230 } while (exception.retry);
5231 return err;
5232}
5233
5234static int _nfs4_do_set_security_label(struct inode *inode,
5235 struct nfs4_label *ilabel,
5236 struct nfs_fattr *fattr,
5237 struct nfs4_label *olabel)
5238{
5239
5240 struct iattr sattr = {0};
5241 struct nfs_server *server = NFS_SERVER(inode);
5242 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5243 struct nfs_setattrargs arg = {
5244 .fh = NFS_FH(inode),
5245 .iap = &sattr,
5246 .server = server,
5247 .bitmask = bitmask,
5248 .label = ilabel,
5249 };
5250 struct nfs_setattrres res = {
5251 .fattr = fattr,
5252 .label = olabel,
5253 .server = server,
5254 };
5255 struct rpc_message msg = {
5256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5257 .rpc_argp = &arg,
5258 .rpc_resp = &res,
5259 };
5260 int status;
5261
5262 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5263
5264 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5265 if (status)
5266 dprintk("%s failed: %d\n", __func__, status);
5267
5268 return status;
5269}
5270
5271static int nfs4_do_set_security_label(struct inode *inode,
5272 struct nfs4_label *ilabel,
5273 struct nfs_fattr *fattr,
5274 struct nfs4_label *olabel)
5275{
5276 struct nfs4_exception exception = { };
5277 int err;
5278
5279 do {
5280 err = _nfs4_do_set_security_label(inode, ilabel,
5281 fattr, olabel);
5282 trace_nfs4_set_security_label(inode, err);
5283 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5284 &exception);
5285 } while (exception.retry);
5286 return err;
5287}
5288
5289static int
5290nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5291{
5292 struct nfs4_label ilabel, *olabel = NULL;
5293 struct nfs_fattr fattr;
5294 struct rpc_cred *cred;
5295 int status;
5296
5297 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5298 return -EOPNOTSUPP;
5299
5300 nfs_fattr_init(&fattr);
5301
5302 ilabel.pi = 0;
5303 ilabel.lfs = 0;
5304 ilabel.label = (char *)buf;
5305 ilabel.len = buflen;
5306
5307 cred = rpc_lookup_cred();
5308 if (IS_ERR(cred))
5309 return PTR_ERR(cred);
5310
5311 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5312 if (IS_ERR(olabel)) {
5313 status = -PTR_ERR(olabel);
5314 goto out;
5315 }
5316
5317 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5318 if (status == 0)
5319 nfs_setsecurity(inode, &fattr, olabel);
5320
5321 nfs4_label_free(olabel);
5322out:
5323 put_rpccred(cred);
5324 return status;
5325}
5326#endif
5327
5328
5329static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5330 nfs4_verifier *bootverf)
5331{
5332 __be32 verf[2];
5333
5334 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5335
5336
5337 verf[0] = cpu_to_be32(U32_MAX);
5338 verf[1] = cpu_to_be32(U32_MAX);
5339 } else {
5340 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5341 u64 ns = ktime_to_ns(nn->boot_time);
5342
5343 verf[0] = cpu_to_be32(ns >> 32);
5344 verf[1] = cpu_to_be32(ns);
5345 }
5346 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5347}
5348
5349static int
5350nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5351{
5352 size_t len;
5353 char *str;
5354
5355 if (clp->cl_owner_id != NULL)
5356 return 0;
5357
5358 rcu_read_lock();
5359 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5360 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5361 1 +
5362 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5363 1;
5364 rcu_read_unlock();
5365
5366 if (len > NFS4_OPAQUE_LIMIT + 1)
5367 return -EINVAL;
5368
5369
5370
5371
5372
5373
5374 str = kmalloc(len, GFP_KERNEL);
5375 if (!str)
5376 return -ENOMEM;
5377
5378 rcu_read_lock();
5379 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5380 clp->cl_ipaddr,
5381 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5382 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5383 rcu_read_unlock();
5384
5385 clp->cl_owner_id = str;
5386 return 0;
5387}
5388
5389static int
5390nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5391{
5392 size_t len;
5393 char *str;
5394
5395 len = 10 + 10 + 1 + 10 + 1 +
5396 strlen(nfs4_client_id_uniquifier) + 1 +
5397 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5398
5399 if (len > NFS4_OPAQUE_LIMIT + 1)
5400 return -EINVAL;
5401
5402
5403
5404
5405
5406
5407 str = kmalloc(len, GFP_KERNEL);
5408 if (!str)
5409 return -ENOMEM;
5410
5411 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5412 clp->rpc_ops->version, clp->cl_minorversion,
5413 nfs4_client_id_uniquifier,
5414 clp->cl_rpcclient->cl_nodename);
5415 clp->cl_owner_id = str;
5416 return 0;
5417}
5418
5419static int
5420nfs4_init_uniform_client_string(struct nfs_client *clp)
5421{
5422 size_t len;
5423 char *str;
5424
5425 if (clp->cl_owner_id != NULL)
5426 return 0;
5427
5428 if (nfs4_client_id_uniquifier[0] != '\0')
5429 return nfs4_init_uniquifier_client_string(clp);
5430
5431 len = 10 + 10 + 1 + 10 + 1 +
5432 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5433
5434 if (len > NFS4_OPAQUE_LIMIT + 1)
5435 return -EINVAL;
5436
5437
5438
5439
5440
5441
5442 str = kmalloc(len, GFP_KERNEL);
5443 if (!str)
5444 return -ENOMEM;
5445
5446 scnprintf(str, len, "Linux NFSv%u.%u %s",
5447 clp->rpc_ops->version, clp->cl_minorversion,
5448 clp->cl_rpcclient->cl_nodename);
5449 clp->cl_owner_id = str;
5450 return 0;
5451}
5452
5453
5454
5455
5456
5457
5458static unsigned int
5459nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5460{
5461 if (strchr(clp->cl_ipaddr, ':') != NULL)
5462 return scnprintf(buf, len, "tcp6");
5463 else
5464 return scnprintf(buf, len, "tcp");
5465}
5466
5467static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5468{
5469 struct nfs4_setclientid *sc = calldata;
5470
5471 if (task->tk_status == 0)
5472 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5473}
5474
5475static const struct rpc_call_ops nfs4_setclientid_ops = {
5476 .rpc_call_done = nfs4_setclientid_done,
5477};
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5490 unsigned short port, struct rpc_cred *cred,
5491 struct nfs4_setclientid_res *res)
5492{
5493 nfs4_verifier sc_verifier;
5494 struct nfs4_setclientid setclientid = {
5495 .sc_verifier = &sc_verifier,
5496 .sc_prog = program,
5497 .sc_clnt = clp,
5498 };
5499 struct rpc_message msg = {
5500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5501 .rpc_argp = &setclientid,
5502 .rpc_resp = res,
5503 .rpc_cred = cred,
5504 };
5505 struct rpc_task *task;
5506 struct rpc_task_setup task_setup_data = {
5507 .rpc_client = clp->cl_rpcclient,
5508 .rpc_message = &msg,
5509 .callback_ops = &nfs4_setclientid_ops,
5510 .callback_data = &setclientid,
5511 .flags = RPC_TASK_TIMEOUT,
5512 };
5513 int status;
5514
5515
5516 nfs4_init_boot_verifier(clp, &sc_verifier);
5517
5518 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5519 status = nfs4_init_uniform_client_string(clp);
5520 else
5521 status = nfs4_init_nonuniform_client_string(clp);
5522
5523 if (status)
5524 goto out;
5525
5526
5527 setclientid.sc_netid_len =
5528 nfs4_init_callback_netid(clp,
5529 setclientid.sc_netid,
5530 sizeof(setclientid.sc_netid));
5531 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5532 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5533 clp->cl_ipaddr, port >> 8, port & 255);
5534
5535 dprintk("NFS call setclientid auth=%s, '%s'\n",
5536 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5537 clp->cl_owner_id);
5538 task = rpc_run_task(&task_setup_data);
5539 if (IS_ERR(task)) {
5540 status = PTR_ERR(task);
5541 goto out;
5542 }
5543 status = task->tk_status;
5544 if (setclientid.sc_cred) {
5545 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5546 put_rpccred(setclientid.sc_cred);
5547 }
5548 rpc_put_task(task);
5549out:
5550 trace_nfs4_setclientid(clp, status);
5551 dprintk("NFS reply setclientid: %d\n", status);
5552 return status;
5553}
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5564 struct nfs4_setclientid_res *arg,
5565 struct rpc_cred *cred)
5566{
5567 struct rpc_message msg = {
5568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5569 .rpc_argp = arg,
5570 .rpc_cred = cred,
5571 };
5572 int status;
5573
5574 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5575 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5576 clp->cl_clientid);
5577 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5578 trace_nfs4_setclientid_confirm(clp, status);
5579 dprintk("NFS reply setclientid_confirm: %d\n", status);
5580 return status;
5581}
5582
5583struct nfs4_delegreturndata {
5584 struct nfs4_delegreturnargs args;
5585 struct nfs4_delegreturnres res;
5586 struct nfs_fh fh;
5587 nfs4_stateid stateid;
5588 unsigned long timestamp;
5589 struct {
5590 struct nfs4_layoutreturn_args arg;
5591 struct nfs4_layoutreturn_res res;
5592 struct nfs4_xdr_opaque_data ld_private;
5593 u32 roc_barrier;
5594 bool roc;
5595 } lr;
5596 struct nfs_fattr fattr;
5597 int rpc_status;
5598 struct inode *inode;
5599};
5600
5601static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5602{
5603 struct nfs4_delegreturndata *data = calldata;
5604
5605 if (!nfs4_sequence_done(task, &data->res.seq_res))
5606 return;
5607
5608 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5609
5610
5611 if (data->args.lr_args && task->tk_status != 0) {
5612 switch(data->res.lr_ret) {
5613 default:
5614 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5615 break;
5616 case 0:
5617 data->args.lr_args = NULL;
5618 data->res.lr_res = NULL;
5619 break;
5620 case -NFS4ERR_ADMIN_REVOKED:
5621 case -NFS4ERR_DELEG_REVOKED:
5622 case -NFS4ERR_EXPIRED:
5623 case -NFS4ERR_BAD_STATEID:
5624 case -NFS4ERR_OLD_STATEID:
5625 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5626 case -NFS4ERR_WRONG_CRED:
5627 data->args.lr_args = NULL;
5628 data->res.lr_res = NULL;
5629 data->res.lr_ret = 0;
5630 rpc_restart_call_prepare(task);
5631 return;
5632 }
5633 }
5634
5635 switch (task->tk_status) {
5636 case 0:
5637 renew_lease(data->res.server, data->timestamp);
5638 break;
5639 case -NFS4ERR_ADMIN_REVOKED:
5640 case -NFS4ERR_DELEG_REVOKED:
5641 case -NFS4ERR_EXPIRED:
5642 nfs4_free_revoked_stateid(data->res.server,
5643 data->args.stateid,
5644 task->tk_msg.rpc_cred);
5645 case -NFS4ERR_BAD_STATEID:
5646 case -NFS4ERR_OLD_STATEID:
5647 case -NFS4ERR_STALE_STATEID:
5648 task->tk_status = 0;
5649 break;
5650 case -NFS4ERR_ACCESS:
5651 if (data->args.bitmask) {
5652 data->args.bitmask = NULL;
5653 data->res.fattr = NULL;
5654 task->tk_status = 0;
5655 rpc_restart_call_prepare(task);
5656 return;
5657 }
5658 default:
5659 if (nfs4_async_handle_error(task, data->res.server,
5660 NULL, NULL) == -EAGAIN) {
5661 rpc_restart_call_prepare(task);
5662 return;
5663 }
5664 }
5665 data->rpc_status = task->tk_status;
5666}
5667
5668static void nfs4_delegreturn_release(void *calldata)
5669{
5670 struct nfs4_delegreturndata *data = calldata;
5671 struct inode *inode = data->inode;
5672
5673 if (inode) {
5674 if (data->lr.roc)
5675 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5676 data->res.lr_ret);
5677 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5678 nfs_iput_and_deactive(inode);
5679 }
5680 kfree(calldata);
5681}
5682
5683static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5684{
5685 struct nfs4_delegreturndata *d_data;
5686
5687 d_data = (struct nfs4_delegreturndata *)data;
5688
5689 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5690 return;
5691
5692 nfs4_setup_sequence(d_data->res.server->nfs_client,
5693 &d_data->args.seq_args,
5694 &d_data->res.seq_res,
5695 task);
5696}
5697
5698static const struct rpc_call_ops nfs4_delegreturn_ops = {
5699 .rpc_call_prepare = nfs4_delegreturn_prepare,
5700 .rpc_call_done = nfs4_delegreturn_done,
5701 .rpc_release = nfs4_delegreturn_release,
5702};
5703
5704static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5705{
5706 struct nfs4_delegreturndata *data;
5707 struct nfs_server *server = NFS_SERVER(inode);
5708 struct rpc_task *task;
5709 struct rpc_message msg = {
5710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5711 .rpc_cred = cred,
5712 };
5713 struct rpc_task_setup task_setup_data = {
5714 .rpc_client = server->client,
5715 .rpc_message = &msg,
5716 .callback_ops = &nfs4_delegreturn_ops,
5717 .flags = RPC_TASK_ASYNC,
5718 };
5719 int status = 0;
5720
5721 data = kzalloc(sizeof(*data), GFP_NOFS);
5722 if (data == NULL)
5723 return -ENOMEM;
5724 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5725
5726 nfs4_state_protect(server->nfs_client,
5727 NFS_SP4_MACH_CRED_CLEANUP,
5728 &task_setup_data.rpc_client, &msg);
5729
5730 data->args.fhandle = &data->fh;
5731 data->args.stateid = &data->stateid;
5732 data->args.bitmask = server->cache_consistency_bitmask;
5733 nfs_copy_fh(&data->fh, NFS_FH(inode));
5734 nfs4_stateid_copy(&data->stateid, stateid);
5735 data->res.fattr = &data->fattr;
5736 data->res.server = server;
5737 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5738 data->lr.arg.ld_private = &data->lr.ld_private;
5739 nfs_fattr_init(data->res.fattr);
5740 data->timestamp = jiffies;
5741 data->rpc_status = 0;
5742 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5743 data->inode = nfs_igrab_and_active(inode);
5744 if (data->inode) {
5745 if (data->lr.roc) {
5746 data->args.lr_args = &data->lr.arg;
5747 data->res.lr_res = &data->lr.res;
5748 }
5749 } else if (data->lr.roc) {
5750 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5751 data->lr.roc = false;
5752 }
5753
5754 task_setup_data.callback_data = data;
5755 msg.rpc_argp = &data->args;
5756 msg.rpc_resp = &data->res;
5757 task = rpc_run_task(&task_setup_data);
5758 if (IS_ERR(task))
5759 return PTR_ERR(task);
5760 if (!issync)
5761 goto out;
5762 status = rpc_wait_for_completion_task(task);
5763 if (status != 0)
5764 goto out;
5765 status = data->rpc_status;
5766out:
5767 rpc_put_task(task);
5768 return status;
5769}
5770
5771int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5772{
5773 struct nfs_server *server = NFS_SERVER(inode);
5774 struct nfs4_exception exception = { };
5775 int err;
5776 do {
5777 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5778 trace_nfs4_delegreturn(inode, stateid, err);
5779 switch (err) {
5780 case -NFS4ERR_STALE_STATEID:
5781 case -NFS4ERR_EXPIRED:
5782 case 0:
5783 return 0;
5784 }
5785 err = nfs4_handle_exception(server, err, &exception);
5786 } while (exception.retry);
5787 return err;
5788}
5789
5790static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5791{
5792 struct inode *inode = state->inode;
5793 struct nfs_server *server = NFS_SERVER(inode);
5794 struct nfs_client *clp = server->nfs_client;
5795 struct nfs_lockt_args arg = {
5796 .fh = NFS_FH(inode),
5797 .fl = request,
5798 };
5799 struct nfs_lockt_res res = {
5800 .denied = request,
5801 };
5802 struct rpc_message msg = {
5803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5804 .rpc_argp = &arg,
5805 .rpc_resp = &res,
5806 .rpc_cred = state->owner->so_cred,
5807 };
5808 struct nfs4_lock_state *lsp;
5809 int status;
5810
5811 arg.lock_owner.clientid = clp->cl_clientid;
5812 status = nfs4_set_lock_state(state, request);
5813 if (status != 0)
5814 goto out;
5815 lsp = request->fl_u.nfs4_fl.owner;
5816 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5817 arg.lock_owner.s_dev = server->s_dev;
5818 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5819 switch (status) {
5820 case 0:
5821 request->fl_type = F_UNLCK;
5822 break;
5823 case -NFS4ERR_DENIED:
5824 status = 0;
5825 }
5826 request->fl_ops->fl_release_private(request);
5827 request->fl_ops = NULL;
5828out:
5829 return status;
5830}
5831
5832static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5833{
5834 struct nfs4_exception exception = { };
5835 int err;
5836
5837 do {
5838 err = _nfs4_proc_getlk(state, cmd, request);
5839 trace_nfs4_get_lock(request, state, cmd, err);
5840 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5841 &exception);
5842 } while (exception.retry);
5843 return err;
5844}
5845
5846struct nfs4_unlockdata {
5847 struct nfs_locku_args arg;
5848 struct nfs_locku_res res;
5849 struct nfs4_lock_state *lsp;
5850 struct nfs_open_context *ctx;
5851 struct nfs_lock_context *l_ctx;
5852 struct file_lock fl;
5853 struct nfs_server *server;
5854 unsigned long timestamp;
5855};
5856
5857static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5858 struct nfs_open_context *ctx,
5859 struct nfs4_lock_state *lsp,
5860 struct nfs_seqid *seqid)
5861{
5862 struct nfs4_unlockdata *p;
5863 struct inode *inode = lsp->ls_state->inode;
5864
5865 p = kzalloc(sizeof(*p), GFP_NOFS);
5866 if (p == NULL)
5867 return NULL;
5868 p->arg.fh = NFS_FH(inode);
5869 p->arg.fl = &p->fl;
5870 p->arg.seqid = seqid;
5871 p->res.seqid = seqid;
5872 p->lsp = lsp;
5873 atomic_inc(&lsp->ls_count);
5874
5875 p->ctx = get_nfs_open_context(ctx);
5876 p->l_ctx = nfs_get_lock_context(ctx);
5877 memcpy(&p->fl, fl, sizeof(p->fl));
5878 p->server = NFS_SERVER(inode);
5879 return p;
5880}
5881
5882static void nfs4_locku_release_calldata(void *data)
5883{
5884 struct nfs4_unlockdata *calldata = data;
5885 nfs_free_seqid(calldata->arg.seqid);
5886 nfs4_put_lock_state(calldata->lsp);
5887 nfs_put_lock_context(calldata->l_ctx);
5888 put_nfs_open_context(calldata->ctx);
5889 kfree(calldata);
5890}
5891
5892static void nfs4_locku_done(struct rpc_task *task, void *data)
5893{
5894 struct nfs4_unlockdata *calldata = data;
5895
5896 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5897 return;
5898 switch (task->tk_status) {
5899 case 0:
5900 renew_lease(calldata->server, calldata->timestamp);
5901 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5902 if (nfs4_update_lock_stateid(calldata->lsp,
5903 &calldata->res.stateid))
5904 break;
5905 case -NFS4ERR_ADMIN_REVOKED:
5906 case -NFS4ERR_EXPIRED:
5907 nfs4_free_revoked_stateid(calldata->server,
5908 &calldata->arg.stateid,
5909 task->tk_msg.rpc_cred);
5910 case -NFS4ERR_BAD_STATEID:
5911 case -NFS4ERR_OLD_STATEID:
5912 case -NFS4ERR_STALE_STATEID:
5913 if (!nfs4_stateid_match(&calldata->arg.stateid,
5914 &calldata->lsp->ls_stateid))
5915 rpc_restart_call_prepare(task);
5916 break;
5917 default:
5918 if (nfs4_async_handle_error(task, calldata->server,
5919 NULL, NULL) == -EAGAIN)
5920 rpc_restart_call_prepare(task);
5921 }
5922 nfs_release_seqid(calldata->arg.seqid);
5923}
5924
5925static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5926{
5927 struct nfs4_unlockdata *calldata = data;
5928
5929 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5930 nfs_async_iocounter_wait(task, calldata->l_ctx))
5931 return;
5932
5933 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5934 goto out_wait;
5935 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5936 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5937
5938 goto out_no_action;
5939 }
5940 calldata->timestamp = jiffies;
5941 if (nfs4_setup_sequence(calldata->server->nfs_client,
5942 &calldata->arg.seq_args,
5943 &calldata->res.seq_res,
5944 task) != 0)
5945 nfs_release_seqid(calldata->arg.seqid);
5946 return;
5947out_no_action:
5948 task->tk_action = NULL;
5949out_wait:
5950 nfs4_sequence_done(task, &calldata->res.seq_res);
5951}
5952
5953static const struct rpc_call_ops nfs4_locku_ops = {
5954 .rpc_call_prepare = nfs4_locku_prepare,
5955 .rpc_call_done = nfs4_locku_done,
5956 .rpc_release = nfs4_locku_release_calldata,
5957};
5958
5959static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5960 struct nfs_open_context *ctx,
5961 struct nfs4_lock_state *lsp,
5962 struct nfs_seqid *seqid)
5963{
5964 struct nfs4_unlockdata *data;
5965 struct rpc_message msg = {
5966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5967 .rpc_cred = ctx->cred,
5968 };
5969 struct rpc_task_setup task_setup_data = {
5970 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5971 .rpc_message = &msg,
5972 .callback_ops = &nfs4_locku_ops,
5973 .workqueue = nfsiod_workqueue,
5974 .flags = RPC_TASK_ASYNC,
5975 };
5976
5977 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5978 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5979
5980
5981
5982
5983 fl->fl_type = F_UNLCK;
5984 if (fl->fl_flags & FL_CLOSE)
5985 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
5986
5987 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5988 if (data == NULL) {
5989 nfs_free_seqid(seqid);
5990 return ERR_PTR(-ENOMEM);
5991 }
5992
5993 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5994 msg.rpc_argp = &data->arg;
5995 msg.rpc_resp = &data->res;
5996 task_setup_data.callback_data = data;
5997 return rpc_run_task(&task_setup_data);
5998}
5999
6000static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6001{
6002 struct inode *inode = state->inode;
6003 struct nfs4_state_owner *sp = state->owner;
6004 struct nfs_inode *nfsi = NFS_I(inode);
6005 struct nfs_seqid *seqid;
6006 struct nfs4_lock_state *lsp;
6007 struct rpc_task *task;
6008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6009 int status = 0;
6010 unsigned char fl_flags = request->fl_flags;
6011
6012 status = nfs4_set_lock_state(state, request);
6013
6014 request->fl_flags |= FL_EXISTS;
6015
6016 mutex_lock(&sp->so_delegreturn_mutex);
6017
6018 down_read(&nfsi->rwsem);
6019 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6020 up_read(&nfsi->rwsem);
6021 mutex_unlock(&sp->so_delegreturn_mutex);
6022 goto out;
6023 }
6024 up_read(&nfsi->rwsem);
6025 mutex_unlock(&sp->so_delegreturn_mutex);
6026 if (status != 0)
6027 goto out;
6028
6029 lsp = request->fl_u.nfs4_fl.owner;
6030 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6031 goto out;
6032 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6033 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6034 status = -ENOMEM;
6035 if (IS_ERR(seqid))
6036 goto out;
6037 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6038 status = PTR_ERR(task);
6039 if (IS_ERR(task))
6040 goto out;
6041 status = rpc_wait_for_completion_task(task);
6042 rpc_put_task(task);
6043out:
6044 request->fl_flags = fl_flags;
6045 trace_nfs4_unlock(request, state, F_SETLK, status);
6046 return status;
6047}
6048
6049struct nfs4_lockdata {
6050 struct nfs_lock_args arg;
6051 struct nfs_lock_res res;
6052 struct nfs4_lock_state *lsp;
6053 struct nfs_open_context *ctx;
6054 struct file_lock fl;
6055 unsigned long timestamp;
6056 int rpc_status;
6057 int cancelled;
6058 struct nfs_server *server;
6059};
6060
6061static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6062 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6063 gfp_t gfp_mask)
6064{
6065 struct nfs4_lockdata *p;
6066 struct inode *inode = lsp->ls_state->inode;
6067 struct nfs_server *server = NFS_SERVER(inode);
6068 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6069
6070 p = kzalloc(sizeof(*p), gfp_mask);
6071 if (p == NULL)
6072 return NULL;
6073
6074 p->arg.fh = NFS_FH(inode);
6075 p->arg.fl = &p->fl;
6076 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6077 if (IS_ERR(p->arg.open_seqid))
6078 goto out_free;
6079 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6080 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6081 if (IS_ERR(p->arg.lock_seqid))
6082 goto out_free_seqid;
6083 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6084 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6085 p->arg.lock_owner.s_dev = server->s_dev;
6086 p->res.lock_seqid = p->arg.lock_seqid;
6087 p->lsp = lsp;
6088 p->server = server;
6089 atomic_inc(&lsp->ls_count);
6090 p->ctx = get_nfs_open_context(ctx);
6091 memcpy(&p->fl, fl, sizeof(p->fl));
6092 return p;
6093out_free_seqid:
6094 nfs_free_seqid(p->arg.open_seqid);
6095out_free:
6096 kfree(p);
6097 return NULL;
6098}
6099
6100static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6101{
6102 struct nfs4_lockdata *data = calldata;
6103 struct nfs4_state *state = data->lsp->ls_state;
6104
6105 dprintk("%s: begin!\n", __func__);
6106 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6107 goto out_wait;
6108
6109 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6110 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6111 goto out_release_lock_seqid;
6112 }
6113 nfs4_stateid_copy(&data->arg.open_stateid,
6114 &state->open_stateid);
6115 data->arg.new_lock_owner = 1;
6116 data->res.open_seqid = data->arg.open_seqid;
6117 } else {
6118 data->arg.new_lock_owner = 0;
6119 nfs4_stateid_copy(&data->arg.lock_stateid,
6120 &data->lsp->ls_stateid);
6121 }
6122 if (!nfs4_valid_open_stateid(state)) {
6123 data->rpc_status = -EBADF;
6124 task->tk_action = NULL;
6125 goto out_release_open_seqid;
6126 }
6127 data->timestamp = jiffies;
6128 if (nfs4_setup_sequence(data->server->nfs_client,
6129 &data->arg.seq_args,
6130 &data->res.seq_res,
6131 task) == 0)
6132 return;
6133out_release_open_seqid:
6134 nfs_release_seqid(data->arg.open_seqid);
6135out_release_lock_seqid:
6136 nfs_release_seqid(data->arg.lock_seqid);
6137out_wait:
6138 nfs4_sequence_done(task, &data->res.seq_res);
6139 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6140}
6141
6142static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6143{
6144 struct nfs4_lockdata *data = calldata;
6145 struct nfs4_lock_state *lsp = data->lsp;
6146
6147 dprintk("%s: begin!\n", __func__);
6148
6149 if (!nfs4_sequence_done(task, &data->res.seq_res))
6150 return;
6151
6152 data->rpc_status = task->tk_status;
6153 switch (task->tk_status) {
6154 case 0:
6155 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6156 data->timestamp);
6157 if (data->arg.new_lock) {
6158 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6159 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6160 rpc_restart_call_prepare(task);
6161 break;
6162 }
6163 }
6164 if (data->arg.new_lock_owner != 0) {
6165 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6166 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6167 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6168 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6169 rpc_restart_call_prepare(task);
6170 break;
6171 case -NFS4ERR_BAD_STATEID:
6172 case -NFS4ERR_OLD_STATEID:
6173 case -NFS4ERR_STALE_STATEID:
6174 case -NFS4ERR_EXPIRED:
6175 if (data->arg.new_lock_owner != 0) {
6176 if (!nfs4_stateid_match(&data->arg.open_stateid,
6177 &lsp->ls_state->open_stateid))
6178 rpc_restart_call_prepare(task);
6179 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6180 &lsp->ls_stateid))
6181 rpc_restart_call_prepare(task);
6182 }
6183 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6184}
6185
6186static void nfs4_lock_release(void *calldata)
6187{
6188 struct nfs4_lockdata *data = calldata;
6189
6190 dprintk("%s: begin!\n", __func__);
6191 nfs_free_seqid(data->arg.open_seqid);
6192 if (data->cancelled) {
6193 struct rpc_task *task;
6194 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6195 data->arg.lock_seqid);
6196 if (!IS_ERR(task))
6197 rpc_put_task_async(task);
6198 dprintk("%s: cancelling lock!\n", __func__);
6199 } else
6200 nfs_free_seqid(data->arg.lock_seqid);
6201 nfs4_put_lock_state(data->lsp);
6202 put_nfs_open_context(data->ctx);
6203 kfree(data);
6204 dprintk("%s: done!\n", __func__);
6205}
6206
6207static const struct rpc_call_ops nfs4_lock_ops = {
6208 .rpc_call_prepare = nfs4_lock_prepare,
6209 .rpc_call_done = nfs4_lock_done,
6210 .rpc_release = nfs4_lock_release,
6211};
6212
6213static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6214{
6215 switch (error) {
6216 case -NFS4ERR_ADMIN_REVOKED:
6217 case -NFS4ERR_EXPIRED:
6218 case -NFS4ERR_BAD_STATEID:
6219 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6220 if (new_lock_owner != 0 ||
6221 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6222 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6223 break;
6224 case -NFS4ERR_STALE_STATEID:
6225 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6226 nfs4_schedule_lease_recovery(server->nfs_client);
6227 };
6228}
6229
6230static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6231{
6232 struct nfs4_lockdata *data;
6233 struct rpc_task *task;
6234 struct rpc_message msg = {
6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6236 .rpc_cred = state->owner->so_cred,
6237 };
6238 struct rpc_task_setup task_setup_data = {
6239 .rpc_client = NFS_CLIENT(state->inode),
6240 .rpc_message = &msg,
6241 .callback_ops = &nfs4_lock_ops,
6242 .workqueue = nfsiod_workqueue,
6243 .flags = RPC_TASK_ASYNC,
6244 };
6245 int ret;
6246
6247 dprintk("%s: begin!\n", __func__);
6248 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6249 fl->fl_u.nfs4_fl.owner,
6250 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6251 if (data == NULL)
6252 return -ENOMEM;
6253 if (IS_SETLKW(cmd))
6254 data->arg.block = 1;
6255 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6256 msg.rpc_argp = &data->arg;
6257 msg.rpc_resp = &data->res;
6258 task_setup_data.callback_data = data;
6259 if (recovery_type > NFS_LOCK_NEW) {
6260 if (recovery_type == NFS_LOCK_RECLAIM)
6261 data->arg.reclaim = NFS_LOCK_RECLAIM;
6262 nfs4_set_sequence_privileged(&data->arg.seq_args);
6263 } else
6264 data->arg.new_lock = 1;
6265 task = rpc_run_task(&task_setup_data);
6266 if (IS_ERR(task))
6267 return PTR_ERR(task);
6268 ret = rpc_wait_for_completion_task(task);
6269 if (ret == 0) {
6270 ret = data->rpc_status;
6271 if (ret)
6272 nfs4_handle_setlk_error(data->server, data->lsp,
6273 data->arg.new_lock_owner, ret);
6274 } else
6275 data->cancelled = true;
6276 rpc_put_task(task);
6277 dprintk("%s: done, ret = %d!\n", __func__, ret);
6278 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6279 return ret;
6280}
6281
6282static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6283{
6284 struct nfs_server *server = NFS_SERVER(state->inode);
6285 struct nfs4_exception exception = {
6286 .inode = state->inode,
6287 };
6288 int err;
6289
6290 do {
6291
6292 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6293 return 0;
6294 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6295 if (err != -NFS4ERR_DELAY)
6296 break;
6297 nfs4_handle_exception(server, err, &exception);
6298 } while (exception.retry);
6299 return err;
6300}
6301
6302static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6303{
6304 struct nfs_server *server = NFS_SERVER(state->inode);
6305 struct nfs4_exception exception = {
6306 .inode = state->inode,
6307 };
6308 int err;
6309
6310 err = nfs4_set_lock_state(state, request);
6311 if (err != 0)
6312 return err;
6313 if (!recover_lost_locks) {
6314 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6315 return 0;
6316 }
6317 do {
6318 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6319 return 0;
6320 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6321 switch (err) {
6322 default:
6323 goto out;
6324 case -NFS4ERR_GRACE:
6325 case -NFS4ERR_DELAY:
6326 nfs4_handle_exception(server, err, &exception);
6327 err = 0;
6328 }
6329 } while (exception.retry);
6330out:
6331 return err;
6332}
6333
6334#if defined(CONFIG_NFS_V4_1)
6335static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6336{
6337 struct nfs4_lock_state *lsp;
6338 int status;
6339
6340 status = nfs4_set_lock_state(state, request);
6341 if (status != 0)
6342 return status;
6343 lsp = request->fl_u.nfs4_fl.owner;
6344 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6345 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6346 return 0;
6347 return nfs4_lock_expired(state, request);
6348}
6349#endif
6350
6351static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6352{
6353 struct nfs_inode *nfsi = NFS_I(state->inode);
6354 struct nfs4_state_owner *sp = state->owner;
6355 unsigned char fl_flags = request->fl_flags;
6356 int status;
6357
6358 request->fl_flags |= FL_ACCESS;
6359 status = locks_lock_inode_wait(state->inode, request);
6360 if (status < 0)
6361 goto out;
6362 mutex_lock(&sp->so_delegreturn_mutex);
6363 down_read(&nfsi->rwsem);
6364 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6365
6366
6367 request->fl_flags = fl_flags & ~FL_SLEEP;
6368 status = locks_lock_inode_wait(state->inode, request);
6369 up_read(&nfsi->rwsem);
6370 mutex_unlock(&sp->so_delegreturn_mutex);
6371 goto out;
6372 }
6373 up_read(&nfsi->rwsem);
6374 mutex_unlock(&sp->so_delegreturn_mutex);
6375 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6376out:
6377 request->fl_flags = fl_flags;
6378 return status;
6379}
6380
6381static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6382{
6383 struct nfs4_exception exception = {
6384 .state = state,
6385 .inode = state->inode,
6386 };
6387 int err;
6388
6389 do {
6390 err = _nfs4_proc_setlk(state, cmd, request);
6391 if (err == -NFS4ERR_DENIED)
6392 err = -EAGAIN;
6393 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6394 err, &exception);
6395 } while (exception.retry);
6396 return err;
6397}
6398
6399#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6400#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6401
6402static int
6403nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6404 struct file_lock *request)
6405{
6406 int status = -ERESTARTSYS;
6407 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6408
6409 while(!signalled()) {
6410 status = nfs4_proc_setlk(state, cmd, request);
6411 if ((status != -EAGAIN) || IS_SETLK(cmd))
6412 break;
6413 freezable_schedule_timeout_interruptible(timeout);
6414 timeout *= 2;
6415 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6416 status = -ERESTARTSYS;
6417 }
6418 return status;
6419}
6420
6421#ifdef CONFIG_NFS_V4_1
6422struct nfs4_lock_waiter {
6423 struct task_struct *task;
6424 struct inode *inode;
6425 struct nfs_lowner *owner;
6426 bool notified;
6427};
6428
6429static int
6430nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
6431{
6432 int ret;
6433 struct cb_notify_lock_args *cbnl = key;
6434 struct nfs4_lock_waiter *waiter = wait->private;
6435 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6436 *wowner = waiter->owner;
6437
6438
6439 if (lowner->clientid != wowner->clientid ||
6440 lowner->id != wowner->id ||
6441 lowner->s_dev != wowner->s_dev)
6442 return 0;
6443
6444
6445 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6446 return 0;
6447
6448 waiter->notified = true;
6449
6450
6451 wait->private = waiter->task;
6452 ret = autoremove_wake_function(wait, mode, flags, key);
6453 wait->private = waiter;
6454 return ret;
6455}
6456
6457static int
6458nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6459{
6460 int status = -ERESTARTSYS;
6461 unsigned long flags;
6462 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6463 struct nfs_server *server = NFS_SERVER(state->inode);
6464 struct nfs_client *clp = server->nfs_client;
6465 wait_queue_head_t *q = &clp->cl_lock_waitq;
6466 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6467 .id = lsp->ls_seqid.owner_id,
6468 .s_dev = server->s_dev };
6469 struct nfs4_lock_waiter waiter = { .task = current,
6470 .inode = state->inode,
6471 .owner = &owner,
6472 .notified = false };
6473 wait_queue_entry_t wait;
6474
6475
6476 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6477 return nfs4_retry_setlk_simple(state, cmd, request);
6478
6479 init_wait(&wait);
6480 wait.private = &waiter;
6481 wait.func = nfs4_wake_lock_waiter;
6482 add_wait_queue(q, &wait);
6483
6484 while(!signalled()) {
6485 status = nfs4_proc_setlk(state, cmd, request);
6486 if ((status != -EAGAIN) || IS_SETLK(cmd))
6487 break;
6488
6489 status = -ERESTARTSYS;
6490 spin_lock_irqsave(&q->lock, flags);
6491 if (waiter.notified) {
6492 spin_unlock_irqrestore(&q->lock, flags);
6493 continue;
6494 }
6495 set_current_state(TASK_INTERRUPTIBLE);
6496 spin_unlock_irqrestore(&q->lock, flags);
6497
6498 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
6499 }
6500
6501 finish_wait(q, &wait);
6502 return status;
6503}
6504#else
6505static inline int
6506nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6507{
6508 return nfs4_retry_setlk_simple(state, cmd, request);
6509}
6510#endif
6511
6512static int
6513nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6514{
6515 struct nfs_open_context *ctx;
6516 struct nfs4_state *state;
6517 int status;
6518
6519
6520 ctx = nfs_file_open_context(filp);
6521 state = ctx->state;
6522
6523 if (IS_GETLK(cmd)) {
6524 if (state != NULL)
6525 return nfs4_proc_getlk(state, F_GETLK, request);
6526 return 0;
6527 }
6528
6529 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6530 return -EINVAL;
6531
6532 if (request->fl_type == F_UNLCK) {
6533 if (state != NULL)
6534 return nfs4_proc_unlck(state, cmd, request);
6535 return 0;
6536 }
6537
6538 if (state == NULL)
6539 return -ENOLCK;
6540
6541 if ((request->fl_flags & FL_POSIX) &&
6542 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6543 return -ENOLCK;
6544
6545 status = nfs4_set_lock_state(state, request);
6546 if (status != 0)
6547 return status;
6548
6549 return nfs4_retry_setlk(state, cmd, request);
6550}
6551
6552int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6553{
6554 struct nfs_server *server = NFS_SERVER(state->inode);
6555 int err;
6556
6557 err = nfs4_set_lock_state(state, fl);
6558 if (err != 0)
6559 return err;
6560 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6561 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6562}
6563
6564struct nfs_release_lockowner_data {
6565 struct nfs4_lock_state *lsp;
6566 struct nfs_server *server;
6567 struct nfs_release_lockowner_args args;
6568 struct nfs_release_lockowner_res res;
6569 unsigned long timestamp;
6570};
6571
6572static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6573{
6574 struct nfs_release_lockowner_data *data = calldata;
6575 struct nfs_server *server = data->server;
6576 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6577 &data->res.seq_res, task);
6578 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6579 data->timestamp = jiffies;
6580}
6581
6582static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6583{
6584 struct nfs_release_lockowner_data *data = calldata;
6585 struct nfs_server *server = data->server;
6586
6587 nfs40_sequence_done(task, &data->res.seq_res);
6588
6589 switch (task->tk_status) {
6590 case 0:
6591 renew_lease(server, data->timestamp);
6592 break;
6593 case -NFS4ERR_STALE_CLIENTID:
6594 case -NFS4ERR_EXPIRED:
6595 nfs4_schedule_lease_recovery(server->nfs_client);
6596 break;
6597 case -NFS4ERR_LEASE_MOVED:
6598 case -NFS4ERR_DELAY:
6599 if (nfs4_async_handle_error(task, server,
6600 NULL, NULL) == -EAGAIN)
6601 rpc_restart_call_prepare(task);
6602 }
6603}
6604
6605static void nfs4_release_lockowner_release(void *calldata)
6606{
6607 struct nfs_release_lockowner_data *data = calldata;
6608 nfs4_free_lock_state(data->server, data->lsp);
6609 kfree(calldata);
6610}
6611
6612static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6613 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6614 .rpc_call_done = nfs4_release_lockowner_done,
6615 .rpc_release = nfs4_release_lockowner_release,
6616};
6617
6618static void
6619nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6620{
6621 struct nfs_release_lockowner_data *data;
6622 struct rpc_message msg = {
6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6624 };
6625
6626 if (server->nfs_client->cl_mvops->minor_version != 0)
6627 return;
6628
6629 data = kmalloc(sizeof(*data), GFP_NOFS);
6630 if (!data)
6631 return;
6632 data->lsp = lsp;
6633 data->server = server;
6634 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6635 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6636 data->args.lock_owner.s_dev = server->s_dev;
6637
6638 msg.rpc_argp = &data->args;
6639 msg.rpc_resp = &data->res;
6640 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6641 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6642}
6643
6644#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6645
6646static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6647 struct dentry *unused, struct inode *inode,
6648 const char *key, const void *buf,
6649 size_t buflen, int flags)
6650{
6651 return nfs4_proc_set_acl(inode, buf, buflen);
6652}
6653
6654static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6655 struct dentry *unused, struct inode *inode,
6656 const char *key, void *buf, size_t buflen)
6657{
6658 return nfs4_proc_get_acl(inode, buf, buflen);
6659}
6660
6661static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6662{
6663 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6664}
6665
6666#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6667
6668static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6669 struct dentry *unused, struct inode *inode,
6670 const char *key, const void *buf,
6671 size_t buflen, int flags)
6672{
6673 if (security_ismaclabel(key))
6674 return nfs4_set_security_label(inode, buf, buflen);
6675
6676 return -EOPNOTSUPP;
6677}
6678
6679static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6680 struct dentry *unused, struct inode *inode,
6681 const char *key, void *buf, size_t buflen)
6682{
6683 if (security_ismaclabel(key))
6684 return nfs4_get_security_label(inode, buf, buflen);
6685 return -EOPNOTSUPP;
6686}
6687
6688static ssize_t
6689nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6690{
6691 int len = 0;
6692
6693 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6694 len = security_inode_listsecurity(inode, list, list_len);
6695 if (list_len && len > list_len)
6696 return -ERANGE;
6697 }
6698 return len;
6699}
6700
6701static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6702 .prefix = XATTR_SECURITY_PREFIX,
6703 .get = nfs4_xattr_get_nfs4_label,
6704 .set = nfs4_xattr_set_nfs4_label,
6705};
6706
6707#else
6708
6709static ssize_t
6710nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6711{
6712 return 0;
6713}
6714
6715#endif
6716
6717
6718
6719
6720static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6721{
6722 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6723 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6724 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6725 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6726 return;
6727
6728 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6729 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6730 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6731 fattr->nlink = 2;
6732}
6733
6734static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6735 const struct qstr *name,
6736 struct nfs4_fs_locations *fs_locations,
6737 struct page *page)
6738{
6739 struct nfs_server *server = NFS_SERVER(dir);
6740 u32 bitmask[3] = {
6741 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6742 };
6743 struct nfs4_fs_locations_arg args = {
6744 .dir_fh = NFS_FH(dir),
6745 .name = name,
6746 .page = page,
6747 .bitmask = bitmask,
6748 };
6749 struct nfs4_fs_locations_res res = {
6750 .fs_locations = fs_locations,
6751 };
6752 struct rpc_message msg = {
6753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6754 .rpc_argp = &args,
6755 .rpc_resp = &res,
6756 };
6757 int status;
6758
6759 dprintk("%s: start\n", __func__);
6760
6761
6762
6763 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6764 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6765 else
6766 bitmask[0] |= FATTR4_WORD0_FILEID;
6767
6768 nfs_fattr_init(&fs_locations->fattr);
6769 fs_locations->server = server;
6770 fs_locations->nlocations = 0;
6771 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6772 dprintk("%s: returned status = %d\n", __func__, status);
6773 return status;
6774}
6775
6776int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6777 const struct qstr *name,
6778 struct nfs4_fs_locations *fs_locations,
6779 struct page *page)
6780{
6781 struct nfs4_exception exception = { };
6782 int err;
6783 do {
6784 err = _nfs4_proc_fs_locations(client, dir, name,
6785 fs_locations, page);
6786 trace_nfs4_get_fs_locations(dir, name, err);
6787 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6788 &exception);
6789 } while (exception.retry);
6790 return err;
6791}
6792
6793
6794
6795
6796
6797
6798
6799
6800static int _nfs40_proc_get_locations(struct inode *inode,
6801 struct nfs4_fs_locations *locations,
6802 struct page *page, struct rpc_cred *cred)
6803{
6804 struct nfs_server *server = NFS_SERVER(inode);
6805 struct rpc_clnt *clnt = server->client;
6806 u32 bitmask[2] = {
6807 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6808 };
6809 struct nfs4_fs_locations_arg args = {
6810 .clientid = server->nfs_client->cl_clientid,
6811 .fh = NFS_FH(inode),
6812 .page = page,
6813 .bitmask = bitmask,
6814 .migration = 1,
6815 .renew = 1,
6816 };
6817 struct nfs4_fs_locations_res res = {
6818 .fs_locations = locations,
6819 .migration = 1,
6820 .renew = 1,
6821 };
6822 struct rpc_message msg = {
6823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6824 .rpc_argp = &args,
6825 .rpc_resp = &res,
6826 .rpc_cred = cred,
6827 };
6828 unsigned long now = jiffies;
6829 int status;
6830
6831 nfs_fattr_init(&locations->fattr);
6832 locations->server = server;
6833 locations->nlocations = 0;
6834
6835 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6836 nfs4_set_sequence_privileged(&args.seq_args);
6837 status = nfs4_call_sync_sequence(clnt, server, &msg,
6838 &args.seq_args, &res.seq_res);
6839 if (status)
6840 return status;
6841
6842 renew_lease(server, now);
6843 return 0;
6844}
6845
6846#ifdef CONFIG_NFS_V4_1
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858static int _nfs41_proc_get_locations(struct inode *inode,
6859 struct nfs4_fs_locations *locations,
6860 struct page *page, struct rpc_cred *cred)
6861{
6862 struct nfs_server *server = NFS_SERVER(inode);
6863 struct rpc_clnt *clnt = server->client;
6864 u32 bitmask[2] = {
6865 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6866 };
6867 struct nfs4_fs_locations_arg args = {
6868 .fh = NFS_FH(inode),
6869 .page = page,
6870 .bitmask = bitmask,
6871 .migration = 1,
6872 };
6873 struct nfs4_fs_locations_res res = {
6874 .fs_locations = locations,
6875 .migration = 1,
6876 };
6877 struct rpc_message msg = {
6878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6879 .rpc_argp = &args,
6880 .rpc_resp = &res,
6881 .rpc_cred = cred,
6882 };
6883 int status;
6884
6885 nfs_fattr_init(&locations->fattr);
6886 locations->server = server;
6887 locations->nlocations = 0;
6888
6889 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6890 nfs4_set_sequence_privileged(&args.seq_args);
6891 status = nfs4_call_sync_sequence(clnt, server, &msg,
6892 &args.seq_args, &res.seq_res);
6893 if (status == NFS4_OK &&
6894 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6895 status = -NFS4ERR_LEASE_MOVED;
6896 return status;
6897}
6898
6899#endif
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918int nfs4_proc_get_locations(struct inode *inode,
6919 struct nfs4_fs_locations *locations,
6920 struct page *page, struct rpc_cred *cred)
6921{
6922 struct nfs_server *server = NFS_SERVER(inode);
6923 struct nfs_client *clp = server->nfs_client;
6924 const struct nfs4_mig_recovery_ops *ops =
6925 clp->cl_mvops->mig_recovery_ops;
6926 struct nfs4_exception exception = { };
6927 int status;
6928
6929 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6930 (unsigned long long)server->fsid.major,
6931 (unsigned long long)server->fsid.minor,
6932 clp->cl_hostname);
6933 nfs_display_fhandle(NFS_FH(inode), __func__);
6934
6935 do {
6936 status = ops->get_locations(inode, locations, page, cred);
6937 if (status != -NFS4ERR_DELAY)
6938 break;
6939 nfs4_handle_exception(server, status, &exception);
6940 } while (exception.retry);
6941 return status;
6942}
6943
6944
6945
6946
6947
6948
6949
6950
6951static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6952{
6953 struct nfs_server *server = NFS_SERVER(inode);
6954 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6955 struct rpc_clnt *clnt = server->client;
6956 struct nfs4_fsid_present_arg args = {
6957 .fh = NFS_FH(inode),
6958 .clientid = clp->cl_clientid,
6959 .renew = 1,
6960 };
6961 struct nfs4_fsid_present_res res = {
6962 .renew = 1,
6963 };
6964 struct rpc_message msg = {
6965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6966 .rpc_argp = &args,
6967 .rpc_resp = &res,
6968 .rpc_cred = cred,
6969 };
6970 unsigned long now = jiffies;
6971 int status;
6972
6973 res.fh = nfs_alloc_fhandle();
6974 if (res.fh == NULL)
6975 return -ENOMEM;
6976
6977 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6978 nfs4_set_sequence_privileged(&args.seq_args);
6979 status = nfs4_call_sync_sequence(clnt, server, &msg,
6980 &args.seq_args, &res.seq_res);
6981 nfs_free_fhandle(res.fh);
6982 if (status)
6983 return status;
6984
6985 do_renew_lease(clp, now);
6986 return 0;
6987}
6988
6989#ifdef CONFIG_NFS_V4_1
6990
6991
6992
6993
6994
6995
6996
6997
6998static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6999{
7000 struct nfs_server *server = NFS_SERVER(inode);
7001 struct rpc_clnt *clnt = server->client;
7002 struct nfs4_fsid_present_arg args = {
7003 .fh = NFS_FH(inode),
7004 };
7005 struct nfs4_fsid_present_res res = {
7006 };
7007 struct rpc_message msg = {
7008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7009 .rpc_argp = &args,
7010 .rpc_resp = &res,
7011 .rpc_cred = cred,
7012 };
7013 int status;
7014
7015 res.fh = nfs_alloc_fhandle();
7016 if (res.fh == NULL)
7017 return -ENOMEM;
7018
7019 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7020 nfs4_set_sequence_privileged(&args.seq_args);
7021 status = nfs4_call_sync_sequence(clnt, server, &msg,
7022 &args.seq_args, &res.seq_res);
7023 nfs_free_fhandle(res.fh);
7024 if (status == NFS4_OK &&
7025 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7026 status = -NFS4ERR_LEASE_MOVED;
7027 return status;
7028}
7029
7030#endif
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7047{
7048 struct nfs_server *server = NFS_SERVER(inode);
7049 struct nfs_client *clp = server->nfs_client;
7050 const struct nfs4_mig_recovery_ops *ops =
7051 clp->cl_mvops->mig_recovery_ops;
7052 struct nfs4_exception exception = { };
7053 int status;
7054
7055 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7056 (unsigned long long)server->fsid.major,
7057 (unsigned long long)server->fsid.minor,
7058 clp->cl_hostname);
7059 nfs_display_fhandle(NFS_FH(inode), __func__);
7060
7061 do {
7062 status = ops->fsid_present(inode, cred);
7063 if (status != -NFS4ERR_DELAY)
7064 break;
7065 nfs4_handle_exception(server, status, &exception);
7066 } while (exception.retry);
7067 return status;
7068}
7069
7070
7071
7072
7073
7074
7075
7076
7077static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7078{
7079 int status;
7080 struct nfs4_secinfo_arg args = {
7081 .dir_fh = NFS_FH(dir),
7082 .name = name,
7083 };
7084 struct nfs4_secinfo_res res = {
7085 .flavors = flavors,
7086 };
7087 struct rpc_message msg = {
7088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7089 .rpc_argp = &args,
7090 .rpc_resp = &res,
7091 };
7092 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7093 struct rpc_cred *cred = NULL;
7094
7095 if (use_integrity) {
7096 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7097 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7098 msg.rpc_cred = cred;
7099 }
7100
7101 dprintk("NFS call secinfo %s\n", name->name);
7102
7103 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7104 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7105
7106 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7107 &res.seq_res, 0);
7108 dprintk("NFS reply secinfo: %d\n", status);
7109
7110 if (cred)
7111 put_rpccred(cred);
7112
7113 return status;
7114}
7115
7116int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7117 struct nfs4_secinfo_flavors *flavors)
7118{
7119 struct nfs4_exception exception = { };
7120 int err;
7121 do {
7122 err = -NFS4ERR_WRONGSEC;
7123
7124
7125 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7126 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7127
7128
7129
7130
7131
7132
7133
7134 if (err == -NFS4ERR_WRONGSEC)
7135 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7136
7137 trace_nfs4_secinfo(dir, name, err);
7138 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7139 &exception);
7140 } while (exception.retry);
7141 return err;
7142}
7143
7144#ifdef CONFIG_NFS_V4_1
7145
7146
7147
7148
7149
7150static int nfs4_check_cl_exchange_flags(u32 flags)
7151{
7152 if (flags & ~EXCHGID4_FLAG_MASK_R)
7153 goto out_inval;
7154 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7155 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7156 goto out_inval;
7157 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7158 goto out_inval;
7159 return NFS_OK;
7160out_inval:
7161 return -NFS4ERR_INVAL;
7162}
7163
7164static bool
7165nfs41_same_server_scope(struct nfs41_server_scope *a,
7166 struct nfs41_server_scope *b)
7167{
7168 if (a->server_scope_sz != b->server_scope_sz)
7169 return false;
7170 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7171}
7172
7173static void
7174nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7175{
7176}
7177
7178static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7179 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7180};
7181
7182
7183
7184
7185
7186
7187
7188static
7189int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7190 struct rpc_xprt *xprt,
7191 struct nfs_client *clp,
7192 struct rpc_cred *cred)
7193{
7194 int status;
7195 struct nfs41_bind_conn_to_session_args args = {
7196 .client = clp,
7197 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7198 };
7199 struct nfs41_bind_conn_to_session_res res;
7200 struct rpc_message msg = {
7201 .rpc_proc =
7202 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7203 .rpc_argp = &args,
7204 .rpc_resp = &res,
7205 .rpc_cred = cred,
7206 };
7207 struct rpc_task_setup task_setup_data = {
7208 .rpc_client = clnt,
7209 .rpc_xprt = xprt,
7210 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7211 .rpc_message = &msg,
7212 .flags = RPC_TASK_TIMEOUT,
7213 };
7214 struct rpc_task *task;
7215
7216 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7217 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7218 args.dir = NFS4_CDFC4_FORE;
7219
7220
7221 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7222 args.dir = NFS4_CDFC4_FORE;
7223
7224 task = rpc_run_task(&task_setup_data);
7225 if (!IS_ERR(task)) {
7226 status = task->tk_status;
7227 rpc_put_task(task);
7228 } else
7229 status = PTR_ERR(task);
7230 trace_nfs4_bind_conn_to_session(clp, status);
7231 if (status == 0) {
7232 if (memcmp(res.sessionid.data,
7233 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7234 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7235 return -EIO;
7236 }
7237 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7238 dprintk("NFS: %s: Unexpected direction from server\n",
7239 __func__);
7240 return -EIO;
7241 }
7242 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7243 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7244 __func__);
7245 return -EIO;
7246 }
7247 }
7248
7249 return status;
7250}
7251
7252struct rpc_bind_conn_calldata {
7253 struct nfs_client *clp;
7254 struct rpc_cred *cred;
7255};
7256
7257static int
7258nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7259 struct rpc_xprt *xprt,
7260 void *calldata)
7261{
7262 struct rpc_bind_conn_calldata *p = calldata;
7263
7264 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7265}
7266
7267int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7268{
7269 struct rpc_bind_conn_calldata data = {
7270 .clp = clp,
7271 .cred = cred,
7272 };
7273 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7274 nfs4_proc_bind_conn_to_session_callback, &data);
7275}
7276
7277
7278
7279
7280
7281static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7282 .how = SP4_MACH_CRED,
7283 .enforce.u.words = {
7284 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7285 1 << (OP_EXCHANGE_ID - 32) |
7286 1 << (OP_CREATE_SESSION - 32) |
7287 1 << (OP_DESTROY_SESSION - 32) |
7288 1 << (OP_DESTROY_CLIENTID - 32)
7289 },
7290 .allow.u.words = {
7291 [0] = 1 << (OP_CLOSE) |
7292 1 << (OP_OPEN_DOWNGRADE) |
7293 1 << (OP_LOCKU) |
7294 1 << (OP_DELEGRETURN) |
7295 1 << (OP_COMMIT),
7296 [1] = 1 << (OP_SECINFO - 32) |
7297 1 << (OP_SECINFO_NO_NAME - 32) |
7298 1 << (OP_LAYOUTRETURN - 32) |
7299 1 << (OP_TEST_STATEID - 32) |
7300 1 << (OP_FREE_STATEID - 32) |
7301 1 << (OP_WRITE - 32)
7302 }
7303};
7304
7305
7306
7307
7308
7309
7310
7311static int nfs4_sp4_select_mode(struct nfs_client *clp,
7312 struct nfs41_state_protection *sp)
7313{
7314 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7315 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7316 1 << (OP_EXCHANGE_ID - 32) |
7317 1 << (OP_CREATE_SESSION - 32) |
7318 1 << (OP_DESTROY_SESSION - 32) |
7319 1 << (OP_DESTROY_CLIENTID - 32)
7320 };
7321 unsigned int i;
7322
7323 if (sp->how == SP4_MACH_CRED) {
7324
7325 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7326 for (i = 0; i <= LAST_NFS4_OP; i++) {
7327 if (test_bit(i, sp->enforce.u.longs))
7328 dfprintk(MOUNT, " enforce op %d\n", i);
7329 if (test_bit(i, sp->allow.u.longs))
7330 dfprintk(MOUNT, " allow op %d\n", i);
7331 }
7332
7333
7334 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7335 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7336 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7337 return -EINVAL;
7338 }
7339 }
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7351 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7352 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7353 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7354 dfprintk(MOUNT, "sp4_mach_cred:\n");
7355 dfprintk(MOUNT, " minimal mode enabled\n");
7356 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7357 } else {
7358 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7359 return -EINVAL;
7360 }
7361
7362 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7363 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7364 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7365 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7366 dfprintk(MOUNT, " cleanup mode enabled\n");
7367 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7368 }
7369
7370 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7371 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7372 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7373 &clp->cl_sp4_flags);
7374 }
7375
7376 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7377 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7378 dfprintk(MOUNT, " secinfo mode enabled\n");
7379 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7380 }
7381
7382 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7383 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7384 dfprintk(MOUNT, " stateid mode enabled\n");
7385 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7386 }
7387
7388 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7389 dfprintk(MOUNT, " write mode enabled\n");
7390 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7391 }
7392
7393 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7394 dfprintk(MOUNT, " commit mode enabled\n");
7395 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7396 }
7397 }
7398
7399 return 0;
7400}
7401
7402struct nfs41_exchange_id_data {
7403 struct nfs41_exchange_id_res res;
7404 struct nfs41_exchange_id_args args;
7405 struct rpc_xprt *xprt;
7406 int rpc_status;
7407};
7408
7409static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7410{
7411 struct nfs41_exchange_id_data *cdata =
7412 (struct nfs41_exchange_id_data *)data;
7413 struct nfs_client *clp = cdata->args.client;
7414 int status = task->tk_status;
7415
7416 trace_nfs4_exchange_id(clp, status);
7417
7418 if (status == 0)
7419 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7420
7421 if (cdata->xprt && status == 0) {
7422 status = nfs4_detect_session_trunking(clp, &cdata->res,
7423 cdata->xprt);
7424 goto out;
7425 }
7426
7427 if (status == 0)
7428 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7429
7430 if (status == 0) {
7431 clp->cl_clientid = cdata->res.clientid;
7432 clp->cl_exchange_flags = cdata->res.flags;
7433 clp->cl_seqid = cdata->res.seqid;
7434
7435 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
7436 clear_bit(NFS4_SESSION_ESTABLISHED,
7437 &clp->cl_session->session_state);
7438
7439 kfree(clp->cl_serverowner);
7440 clp->cl_serverowner = cdata->res.server_owner;
7441 cdata->res.server_owner = NULL;
7442
7443
7444 kfree(clp->cl_implid);
7445 clp->cl_implid = cdata->res.impl_id;
7446 cdata->res.impl_id = NULL;
7447
7448 if (clp->cl_serverscope != NULL &&
7449 !nfs41_same_server_scope(clp->cl_serverscope,
7450 cdata->res.server_scope)) {
7451 dprintk("%s: server_scope mismatch detected\n",
7452 __func__);
7453 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7454 kfree(clp->cl_serverscope);
7455 clp->cl_serverscope = NULL;
7456 }
7457
7458 if (clp->cl_serverscope == NULL) {
7459 clp->cl_serverscope = cdata->res.server_scope;
7460 cdata->res.server_scope = NULL;
7461 }
7462
7463 memcpy(clp->cl_confirm.data, cdata->args.verifier.data,
7464 sizeof(clp->cl_confirm.data));
7465 }
7466out:
7467 cdata->rpc_status = status;
7468 return;
7469}
7470
7471static void nfs4_exchange_id_release(void *data)
7472{
7473 struct nfs41_exchange_id_data *cdata =
7474 (struct nfs41_exchange_id_data *)data;
7475
7476 nfs_put_client(cdata->args.client);
7477 kfree(cdata->res.impl_id);
7478 kfree(cdata->res.server_scope);
7479 kfree(cdata->res.server_owner);
7480 kfree(cdata);
7481}
7482
7483static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7484 .rpc_call_done = nfs4_exchange_id_done,
7485 .rpc_release = nfs4_exchange_id_release,
7486};
7487
7488
7489
7490
7491
7492
7493static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7494 u32 sp4_how, struct rpc_xprt *xprt)
7495{
7496 struct rpc_message msg = {
7497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7498 .rpc_cred = cred,
7499 };
7500 struct rpc_task_setup task_setup_data = {
7501 .rpc_client = clp->cl_rpcclient,
7502 .callback_ops = &nfs4_exchange_id_call_ops,
7503 .rpc_message = &msg,
7504 .flags = RPC_TASK_TIMEOUT,
7505 };
7506 struct nfs41_exchange_id_data *calldata;
7507 struct rpc_task *task;
7508 int status;
7509
7510 if (!atomic_inc_not_zero(&clp->cl_count))
7511 return -EIO;
7512
7513 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7514 if (!calldata) {
7515 nfs_put_client(clp);
7516 return -ENOMEM;
7517 }
7518
7519 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
7520
7521 status = nfs4_init_uniform_client_string(clp);
7522 if (status)
7523 goto out_calldata;
7524
7525 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7526 GFP_NOFS);
7527 status = -ENOMEM;
7528 if (unlikely(calldata->res.server_owner == NULL))
7529 goto out_calldata;
7530
7531 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7532 GFP_NOFS);
7533 if (unlikely(calldata->res.server_scope == NULL))
7534 goto out_server_owner;
7535
7536 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7537 if (unlikely(calldata->res.impl_id == NULL))
7538 goto out_server_scope;
7539
7540 switch (sp4_how) {
7541 case SP4_NONE:
7542 calldata->args.state_protect.how = SP4_NONE;
7543 break;
7544
7545 case SP4_MACH_CRED:
7546 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7547 break;
7548
7549 default:
7550
7551 WARN_ON_ONCE(1);
7552 status = -EINVAL;
7553 goto out_impl_id;
7554 }
7555 if (xprt) {
7556 calldata->xprt = xprt;
7557 task_setup_data.rpc_xprt = xprt;
7558 task_setup_data.flags |= RPC_TASK_SOFTCONN;
7559 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7560 sizeof(calldata->args.verifier.data));
7561 }
7562 calldata->args.client = clp;
7563#ifdef CONFIG_NFS_V4_1_MIGRATION
7564 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7565 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7566 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7567#else
7568 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7569 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7570#endif
7571 msg.rpc_argp = &calldata->args;
7572 msg.rpc_resp = &calldata->res;
7573 task_setup_data.callback_data = calldata;
7574
7575 task = rpc_run_task(&task_setup_data);
7576 if (IS_ERR(task))
7577 return PTR_ERR(task);
7578
7579 status = calldata->rpc_status;
7580
7581 rpc_put_task(task);
7582out:
7583 return status;
7584
7585out_impl_id:
7586 kfree(calldata->res.impl_id);
7587out_server_scope:
7588 kfree(calldata->res.server_scope);
7589out_server_owner:
7590 kfree(calldata->res.server_owner);
7591out_calldata:
7592 kfree(calldata);
7593 nfs_put_client(clp);
7594 goto out;
7595}
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7610{
7611 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7612 int status;
7613
7614
7615 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7616 authflavor == RPC_AUTH_GSS_KRB5P) {
7617 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7618 if (!status)
7619 return 0;
7620 }
7621
7622
7623 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7624}
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7642 void *data)
7643{
7644 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7645 u32 sp4_how;
7646
7647 dprintk("--> %s try %s\n", __func__,
7648 xprt->address_strings[RPC_DISPLAY_ADDR]);
7649
7650 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7651
7652
7653 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7654}
7655EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7656
7657static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7658 struct rpc_cred *cred)
7659{
7660 struct rpc_message msg = {
7661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7662 .rpc_argp = clp,
7663 .rpc_cred = cred,
7664 };
7665 int status;
7666
7667 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7668 trace_nfs4_destroy_clientid(clp, status);
7669 if (status)
7670 dprintk("NFS: Got error %d from the server %s on "
7671 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7672 return status;
7673}
7674
7675static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7676 struct rpc_cred *cred)
7677{
7678 unsigned int loop;
7679 int ret;
7680
7681 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7682 ret = _nfs4_proc_destroy_clientid(clp, cred);
7683 switch (ret) {
7684 case -NFS4ERR_DELAY:
7685 case -NFS4ERR_CLIENTID_BUSY:
7686 ssleep(1);
7687 break;
7688 default:
7689 return ret;
7690 }
7691 }
7692 return 0;
7693}
7694
7695int nfs4_destroy_clientid(struct nfs_client *clp)
7696{
7697 struct rpc_cred *cred;
7698 int ret = 0;
7699
7700 if (clp->cl_mvops->minor_version < 1)
7701 goto out;
7702 if (clp->cl_exchange_flags == 0)
7703 goto out;
7704 if (clp->cl_preserve_clid)
7705 goto out;
7706 cred = nfs4_get_clid_cred(clp);
7707 ret = nfs4_proc_destroy_clientid(clp, cred);
7708 if (cred)
7709 put_rpccred(cred);
7710 switch (ret) {
7711 case 0:
7712 case -NFS4ERR_STALE_CLIENTID:
7713 clp->cl_exchange_flags = 0;
7714 }
7715out:
7716 return ret;
7717}
7718
7719struct nfs4_get_lease_time_data {
7720 struct nfs4_get_lease_time_args *args;
7721 struct nfs4_get_lease_time_res *res;
7722 struct nfs_client *clp;
7723};
7724
7725static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7726 void *calldata)
7727{
7728 struct nfs4_get_lease_time_data *data =
7729 (struct nfs4_get_lease_time_data *)calldata;
7730
7731 dprintk("--> %s\n", __func__);
7732
7733
7734 nfs4_setup_sequence(data->clp,
7735 &data->args->la_seq_args,
7736 &data->res->lr_seq_res,
7737 task);
7738 dprintk("<-- %s\n", __func__);
7739}
7740
7741
7742
7743
7744
7745static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7746{
7747 struct nfs4_get_lease_time_data *data =
7748 (struct nfs4_get_lease_time_data *)calldata;
7749
7750 dprintk("--> %s\n", __func__);
7751 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7752 return;
7753 switch (task->tk_status) {
7754 case -NFS4ERR_DELAY:
7755 case -NFS4ERR_GRACE:
7756 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7757 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7758 task->tk_status = 0;
7759
7760 case -NFS4ERR_RETRY_UNCACHED_REP:
7761 rpc_restart_call_prepare(task);
7762 return;
7763 }
7764 dprintk("<-- %s\n", __func__);
7765}
7766
7767static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7768 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7769 .rpc_call_done = nfs4_get_lease_time_done,
7770};
7771
7772int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7773{
7774 struct rpc_task *task;
7775 struct nfs4_get_lease_time_args args;
7776 struct nfs4_get_lease_time_res res = {
7777 .lr_fsinfo = fsinfo,
7778 };
7779 struct nfs4_get_lease_time_data data = {
7780 .args = &args,
7781 .res = &res,
7782 .clp = clp,
7783 };
7784 struct rpc_message msg = {
7785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7786 .rpc_argp = &args,
7787 .rpc_resp = &res,
7788 };
7789 struct rpc_task_setup task_setup = {
7790 .rpc_client = clp->cl_rpcclient,
7791 .rpc_message = &msg,
7792 .callback_ops = &nfs4_get_lease_time_ops,
7793 .callback_data = &data,
7794 .flags = RPC_TASK_TIMEOUT,
7795 };
7796 int status;
7797
7798 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7799 nfs4_set_sequence_privileged(&args.la_seq_args);
7800 task = rpc_run_task(&task_setup);
7801
7802 if (IS_ERR(task))
7803 return PTR_ERR(task);
7804
7805 status = task->tk_status;
7806 rpc_put_task(task);
7807 return status;
7808}
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7820 struct rpc_clnt *clnt)
7821{
7822 unsigned int max_rqst_sz, max_resp_sz;
7823 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7824
7825 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7826 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7827
7828
7829 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7830 args->fc_attrs.max_resp_sz = max_resp_sz;
7831 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7832 args->fc_attrs.max_reqs = max_session_slots;
7833
7834 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7835 "max_ops=%u max_reqs=%u\n",
7836 __func__,
7837 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7838 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7839
7840
7841 args->bc_attrs.max_rqst_sz = max_bc_payload;
7842 args->bc_attrs.max_resp_sz = max_bc_payload;
7843 args->bc_attrs.max_resp_sz_cached = 0;
7844 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7845 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7846
7847 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7848 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7849 __func__,
7850 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7851 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7852 args->bc_attrs.max_reqs);
7853}
7854
7855static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7856 struct nfs41_create_session_res *res)
7857{
7858 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7859 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7860
7861 if (rcvd->max_resp_sz > sent->max_resp_sz)
7862 return -EINVAL;
7863
7864
7865
7866
7867
7868
7869 if (rcvd->max_ops < sent->max_ops)
7870 return -EINVAL;
7871 if (rcvd->max_reqs == 0)
7872 return -EINVAL;
7873 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7874 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7875 return 0;
7876}
7877
7878static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7879 struct nfs41_create_session_res *res)
7880{
7881 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7882 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7883
7884 if (!(res->flags & SESSION4_BACK_CHAN))
7885 goto out;
7886 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7887 return -EINVAL;
7888 if (rcvd->max_resp_sz < sent->max_resp_sz)
7889 return -EINVAL;
7890 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7891 return -EINVAL;
7892 if (rcvd->max_ops > sent->max_ops)
7893 return -EINVAL;
7894 if (rcvd->max_reqs > sent->max_reqs)
7895 return -EINVAL;
7896out:
7897 return 0;
7898}
7899
7900static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7901 struct nfs41_create_session_res *res)
7902{
7903 int ret;
7904
7905 ret = nfs4_verify_fore_channel_attrs(args, res);
7906 if (ret)
7907 return ret;
7908 return nfs4_verify_back_channel_attrs(args, res);
7909}
7910
7911static void nfs4_update_session(struct nfs4_session *session,
7912 struct nfs41_create_session_res *res)
7913{
7914 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7915
7916 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7917 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7918 session->flags = res->flags;
7919 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7920 if (res->flags & SESSION4_BACK_CHAN)
7921 memcpy(&session->bc_attrs, &res->bc_attrs,
7922 sizeof(session->bc_attrs));
7923}
7924
7925static int _nfs4_proc_create_session(struct nfs_client *clp,
7926 struct rpc_cred *cred)
7927{
7928 struct nfs4_session *session = clp->cl_session;
7929 struct nfs41_create_session_args args = {
7930 .client = clp,
7931 .clientid = clp->cl_clientid,
7932 .seqid = clp->cl_seqid,
7933 .cb_program = NFS4_CALLBACK,
7934 };
7935 struct nfs41_create_session_res res;
7936
7937 struct rpc_message msg = {
7938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7939 .rpc_argp = &args,
7940 .rpc_resp = &res,
7941 .rpc_cred = cred,
7942 };
7943 int status;
7944
7945 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7946 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7947
7948 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7949 trace_nfs4_create_session(clp, status);
7950
7951 switch (status) {
7952 case -NFS4ERR_STALE_CLIENTID:
7953 case -NFS4ERR_DELAY:
7954 case -ETIMEDOUT:
7955 case -EACCES:
7956 case -EAGAIN:
7957 goto out;
7958 };
7959
7960 clp->cl_seqid++;
7961 if (!status) {
7962
7963 status = nfs4_verify_channel_attrs(&args, &res);
7964
7965 if (status)
7966 goto out;
7967 nfs4_update_session(session, &res);
7968 }
7969out:
7970 return status;
7971}
7972
7973
7974
7975
7976
7977
7978int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7979{
7980 int status;
7981 unsigned *ptr;
7982 struct nfs4_session *session = clp->cl_session;
7983
7984 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7985
7986 status = _nfs4_proc_create_session(clp, cred);
7987 if (status)
7988 goto out;
7989
7990
7991 status = nfs4_setup_session_slot_tables(session);
7992 dprintk("slot table setup returned %d\n", status);
7993 if (status)
7994 goto out;
7995
7996 ptr = (unsigned *)&session->sess_id.data[0];
7997 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7998 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7999out:
8000 dprintk("<-- %s\n", __func__);
8001 return status;
8002}
8003
8004
8005
8006
8007
8008int nfs4_proc_destroy_session(struct nfs4_session *session,
8009 struct rpc_cred *cred)
8010{
8011 struct rpc_message msg = {
8012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8013 .rpc_argp = session,
8014 .rpc_cred = cred,
8015 };
8016 int status = 0;
8017
8018 dprintk("--> nfs4_proc_destroy_session\n");
8019
8020
8021 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8022 return 0;
8023
8024 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8025 trace_nfs4_destroy_session(session->clp, status);
8026
8027 if (status)
8028 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8029 "Session has been destroyed regardless...\n", status);
8030
8031 dprintk("<-- nfs4_proc_destroy_session\n");
8032 return status;
8033}
8034
8035
8036
8037
8038struct nfs4_sequence_data {
8039 struct nfs_client *clp;
8040 struct nfs4_sequence_args args;
8041 struct nfs4_sequence_res res;
8042};
8043
8044static void nfs41_sequence_release(void *data)
8045{
8046 struct nfs4_sequence_data *calldata = data;
8047 struct nfs_client *clp = calldata->clp;
8048
8049 if (atomic_read(&clp->cl_count) > 1)
8050 nfs4_schedule_state_renewal(clp);
8051 nfs_put_client(clp);
8052 kfree(calldata);
8053}
8054
8055static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8056{
8057 switch(task->tk_status) {
8058 case -NFS4ERR_DELAY:
8059 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8060 return -EAGAIN;
8061 default:
8062 nfs4_schedule_lease_recovery(clp);
8063 }
8064 return 0;
8065}
8066
8067static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8068{
8069 struct nfs4_sequence_data *calldata = data;
8070 struct nfs_client *clp = calldata->clp;
8071
8072 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8073 return;
8074
8075 trace_nfs4_sequence(clp, task->tk_status);
8076 if (task->tk_status < 0) {
8077 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8078 if (atomic_read(&clp->cl_count) == 1)
8079 goto out;
8080
8081 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8082 rpc_restart_call_prepare(task);
8083 return;
8084 }
8085 }
8086 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8087out:
8088 dprintk("<-- %s\n", __func__);
8089}
8090
8091static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8092{
8093 struct nfs4_sequence_data *calldata = data;
8094 struct nfs_client *clp = calldata->clp;
8095 struct nfs4_sequence_args *args;
8096 struct nfs4_sequence_res *res;
8097
8098 args = task->tk_msg.rpc_argp;
8099 res = task->tk_msg.rpc_resp;
8100
8101 nfs4_setup_sequence(clp, args, res, task);
8102}
8103
8104static const struct rpc_call_ops nfs41_sequence_ops = {
8105 .rpc_call_done = nfs41_sequence_call_done,
8106 .rpc_call_prepare = nfs41_sequence_prepare,
8107 .rpc_release = nfs41_sequence_release,
8108};
8109
8110static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8111 struct rpc_cred *cred,
8112 bool is_privileged)
8113{
8114 struct nfs4_sequence_data *calldata;
8115 struct rpc_message msg = {
8116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8117 .rpc_cred = cred,
8118 };
8119 struct rpc_task_setup task_setup_data = {
8120 .rpc_client = clp->cl_rpcclient,
8121 .rpc_message = &msg,
8122 .callback_ops = &nfs41_sequence_ops,
8123 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8124 };
8125
8126 if (!atomic_inc_not_zero(&clp->cl_count))
8127 return ERR_PTR(-EIO);
8128 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8129 if (calldata == NULL) {
8130 nfs_put_client(clp);
8131 return ERR_PTR(-ENOMEM);
8132 }
8133 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8134 if (is_privileged)
8135 nfs4_set_sequence_privileged(&calldata->args);
8136 msg.rpc_argp = &calldata->args;
8137 msg.rpc_resp = &calldata->res;
8138 calldata->clp = clp;
8139 task_setup_data.callback_data = calldata;
8140
8141 return rpc_run_task(&task_setup_data);
8142}
8143
8144static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8145{
8146 struct rpc_task *task;
8147 int ret = 0;
8148
8149 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8150 return -EAGAIN;
8151 task = _nfs41_proc_sequence(clp, cred, false);
8152 if (IS_ERR(task))
8153 ret = PTR_ERR(task);
8154 else
8155 rpc_put_task_async(task);
8156 dprintk("<-- %s status=%d\n", __func__, ret);
8157 return ret;
8158}
8159
8160static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8161{
8162 struct rpc_task *task;
8163 int ret;
8164
8165 task = _nfs41_proc_sequence(clp, cred, true);
8166 if (IS_ERR(task)) {
8167 ret = PTR_ERR(task);
8168 goto out;
8169 }
8170 ret = rpc_wait_for_completion_task(task);
8171 if (!ret)
8172 ret = task->tk_status;
8173 rpc_put_task(task);
8174out:
8175 dprintk("<-- %s status=%d\n", __func__, ret);
8176 return ret;
8177}
8178
8179struct nfs4_reclaim_complete_data {
8180 struct nfs_client *clp;
8181 struct nfs41_reclaim_complete_args arg;
8182 struct nfs41_reclaim_complete_res res;
8183};
8184
8185static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8186{
8187 struct nfs4_reclaim_complete_data *calldata = data;
8188
8189 nfs4_setup_sequence(calldata->clp,
8190 &calldata->arg.seq_args,
8191 &calldata->res.seq_res,
8192 task);
8193}
8194
8195static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8196{
8197 switch(task->tk_status) {
8198 case 0:
8199 case -NFS4ERR_COMPLETE_ALREADY:
8200 case -NFS4ERR_WRONG_CRED:
8201 break;
8202 case -NFS4ERR_DELAY:
8203 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8204
8205 case -NFS4ERR_RETRY_UNCACHED_REP:
8206 return -EAGAIN;
8207 case -NFS4ERR_BADSESSION:
8208 case -NFS4ERR_DEADSESSION:
8209 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8210 nfs4_schedule_session_recovery(clp->cl_session,
8211 task->tk_status);
8212 break;
8213 default:
8214 nfs4_schedule_lease_recovery(clp);
8215 }
8216 return 0;
8217}
8218
8219static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8220{
8221 struct nfs4_reclaim_complete_data *calldata = data;
8222 struct nfs_client *clp = calldata->clp;
8223 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8224
8225 dprintk("--> %s\n", __func__);
8226 if (!nfs41_sequence_done(task, res))
8227 return;
8228
8229 trace_nfs4_reclaim_complete(clp, task->tk_status);
8230 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8231 rpc_restart_call_prepare(task);
8232 return;
8233 }
8234 dprintk("<-- %s\n", __func__);
8235}
8236
8237static void nfs4_free_reclaim_complete_data(void *data)
8238{
8239 struct nfs4_reclaim_complete_data *calldata = data;
8240
8241 kfree(calldata);
8242}
8243
8244static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8245 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8246 .rpc_call_done = nfs4_reclaim_complete_done,
8247 .rpc_release = nfs4_free_reclaim_complete_data,
8248};
8249
8250
8251
8252
8253static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8254 struct rpc_cred *cred)
8255{
8256 struct nfs4_reclaim_complete_data *calldata;
8257 struct rpc_task *task;
8258 struct rpc_message msg = {
8259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8260 .rpc_cred = cred,
8261 };
8262 struct rpc_task_setup task_setup_data = {
8263 .rpc_client = clp->cl_rpcclient,
8264 .rpc_message = &msg,
8265 .callback_ops = &nfs4_reclaim_complete_call_ops,
8266 .flags = RPC_TASK_ASYNC,
8267 };
8268 int status = -ENOMEM;
8269
8270 dprintk("--> %s\n", __func__);
8271 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8272 if (calldata == NULL)
8273 goto out;
8274 calldata->clp = clp;
8275 calldata->arg.one_fs = 0;
8276
8277 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8278 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8279 msg.rpc_argp = &calldata->arg;
8280 msg.rpc_resp = &calldata->res;
8281 task_setup_data.callback_data = calldata;
8282 task = rpc_run_task(&task_setup_data);
8283 if (IS_ERR(task)) {
8284 status = PTR_ERR(task);
8285 goto out;
8286 }
8287 status = rpc_wait_for_completion_task(task);
8288 if (status == 0)
8289 status = task->tk_status;
8290 rpc_put_task(task);
8291out:
8292 dprintk("<-- %s status=%d\n", __func__, status);
8293 return status;
8294}
8295
8296static void
8297nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8298{
8299 struct nfs4_layoutget *lgp = calldata;
8300 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8301
8302 dprintk("--> %s\n", __func__);
8303 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8304 &lgp->res.seq_res, task);
8305 dprintk("<-- %s\n", __func__);
8306}
8307
8308static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8309{
8310 struct nfs4_layoutget *lgp = calldata;
8311
8312 dprintk("--> %s\n", __func__);
8313 nfs41_sequence_process(task, &lgp->res.seq_res);
8314 dprintk("<-- %s\n", __func__);
8315}
8316
8317static int
8318nfs4_layoutget_handle_exception(struct rpc_task *task,
8319 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8320{
8321 struct inode *inode = lgp->args.inode;
8322 struct nfs_server *server = NFS_SERVER(inode);
8323 struct pnfs_layout_hdr *lo;
8324 int nfs4err = task->tk_status;
8325 int err, status = 0;
8326 LIST_HEAD(head);
8327
8328 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8329
8330 switch (nfs4err) {
8331 case 0:
8332 goto out;
8333
8334
8335
8336
8337
8338
8339 case -NFS4ERR_LAYOUTUNAVAILABLE:
8340 status = -ENODATA;
8341 goto out;
8342
8343
8344
8345
8346 case -NFS4ERR_BADLAYOUT:
8347 status = -EOVERFLOW;
8348 goto out;
8349
8350
8351
8352
8353
8354
8355
8356
8357 case -NFS4ERR_LAYOUTTRYLATER:
8358 if (lgp->args.minlength == 0) {
8359 status = -EOVERFLOW;
8360 goto out;
8361 }
8362 status = -EBUSY;
8363 break;
8364 case -NFS4ERR_RECALLCONFLICT:
8365 status = -ERECALLCONFLICT;
8366 break;
8367 case -NFS4ERR_DELEG_REVOKED:
8368 case -NFS4ERR_ADMIN_REVOKED:
8369 case -NFS4ERR_EXPIRED:
8370 case -NFS4ERR_BAD_STATEID:
8371 exception->timeout = 0;
8372 spin_lock(&inode->i_lock);
8373 lo = NFS_I(inode)->layout;
8374
8375 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8376 nfs4_stateid_match_other(&lgp->args.stateid,
8377 &lgp->args.ctx->state->stateid)) {
8378 spin_unlock(&inode->i_lock);
8379 exception->state = lgp->args.ctx->state;
8380 exception->stateid = &lgp->args.stateid;
8381 break;
8382 }
8383
8384
8385
8386
8387 pnfs_mark_layout_stateid_invalid(lo, &head);
8388 spin_unlock(&inode->i_lock);
8389 nfs_commit_inode(inode, 0);
8390 pnfs_free_lseg_list(&head);
8391 status = -EAGAIN;
8392 goto out;
8393 }
8394
8395 nfs4_sequence_free_slot(&lgp->res.seq_res);
8396 err = nfs4_handle_exception(server, nfs4err, exception);
8397 if (!status) {
8398 if (exception->retry)
8399 status = -EAGAIN;
8400 else
8401 status = err;
8402 }
8403out:
8404 dprintk("<-- %s\n", __func__);
8405 return status;
8406}
8407
8408static size_t max_response_pages(struct nfs_server *server)
8409{
8410 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8411 return nfs_page_array_len(0, max_resp_sz);
8412}
8413
8414static void nfs4_free_pages(struct page **pages, size_t size)
8415{
8416 int i;
8417
8418 if (!pages)
8419 return;
8420
8421 for (i = 0; i < size; i++) {
8422 if (!pages[i])
8423 break;
8424 __free_page(pages[i]);
8425 }
8426 kfree(pages);
8427}
8428
8429static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8430{
8431 struct page **pages;
8432 int i;
8433
8434 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8435 if (!pages) {
8436 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8437 return NULL;
8438 }
8439
8440 for (i = 0; i < size; i++) {
8441 pages[i] = alloc_page(gfp_flags);
8442 if (!pages[i]) {
8443 dprintk("%s: failed to allocate page\n", __func__);
8444 nfs4_free_pages(pages, size);
8445 return NULL;
8446 }
8447 }
8448
8449 return pages;
8450}
8451
8452static void nfs4_layoutget_release(void *calldata)
8453{
8454 struct nfs4_layoutget *lgp = calldata;
8455 struct inode *inode = lgp->args.inode;
8456 struct nfs_server *server = NFS_SERVER(inode);
8457 size_t max_pages = max_response_pages(server);
8458
8459 dprintk("--> %s\n", __func__);
8460 nfs4_sequence_free_slot(&lgp->res.seq_res);
8461 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8462 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8463 put_nfs_open_context(lgp->args.ctx);
8464 kfree(calldata);
8465 dprintk("<-- %s\n", __func__);
8466}
8467
8468static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8469 .rpc_call_prepare = nfs4_layoutget_prepare,
8470 .rpc_call_done = nfs4_layoutget_done,
8471 .rpc_release = nfs4_layoutget_release,
8472};
8473
8474struct pnfs_layout_segment *
8475nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8476{
8477 struct inode *inode = lgp->args.inode;
8478 struct nfs_server *server = NFS_SERVER(inode);
8479 size_t max_pages = max_response_pages(server);
8480 struct rpc_task *task;
8481 struct rpc_message msg = {
8482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8483 .rpc_argp = &lgp->args,
8484 .rpc_resp = &lgp->res,
8485 .rpc_cred = lgp->cred,
8486 };
8487 struct rpc_task_setup task_setup_data = {
8488 .rpc_client = server->client,
8489 .rpc_message = &msg,
8490 .callback_ops = &nfs4_layoutget_call_ops,
8491 .callback_data = lgp,
8492 .flags = RPC_TASK_ASYNC,
8493 };
8494 struct pnfs_layout_segment *lseg = NULL;
8495 struct nfs4_exception exception = {
8496 .inode = inode,
8497 .timeout = *timeout,
8498 };
8499 int status = 0;
8500
8501 dprintk("--> %s\n", __func__);
8502
8503
8504 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8505
8506 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8507 if (!lgp->args.layout.pages) {
8508 nfs4_layoutget_release(lgp);
8509 return ERR_PTR(-ENOMEM);
8510 }
8511 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8512
8513 lgp->res.layoutp = &lgp->args.layout;
8514 lgp->res.seq_res.sr_slot = NULL;
8515 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8516
8517 task = rpc_run_task(&task_setup_data);
8518 if (IS_ERR(task))
8519 return ERR_CAST(task);
8520 status = rpc_wait_for_completion_task(task);
8521 if (status == 0) {
8522 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8523 *timeout = exception.timeout;
8524 }
8525
8526 trace_nfs4_layoutget(lgp->args.ctx,
8527 &lgp->args.range,
8528 &lgp->res.range,
8529 &lgp->res.stateid,
8530 status);
8531
8532
8533 if (status == 0 && lgp->res.layoutp->len)
8534 lseg = pnfs_layout_process(lgp);
8535 rpc_put_task(task);
8536 dprintk("<-- %s status=%d\n", __func__, status);
8537 if (status)
8538 return ERR_PTR(status);
8539 return lseg;
8540}
8541
8542static void
8543nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8544{
8545 struct nfs4_layoutreturn *lrp = calldata;
8546
8547 dprintk("--> %s\n", __func__);
8548 nfs4_setup_sequence(lrp->clp,
8549 &lrp->args.seq_args,
8550 &lrp->res.seq_res,
8551 task);
8552}
8553
8554static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8555{
8556 struct nfs4_layoutreturn *lrp = calldata;
8557 struct nfs_server *server;
8558
8559 dprintk("--> %s\n", __func__);
8560
8561 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8562 return;
8563
8564 server = NFS_SERVER(lrp->args.inode);
8565 switch (task->tk_status) {
8566 default:
8567 task->tk_status = 0;
8568 case 0:
8569 break;
8570 case -NFS4ERR_DELAY:
8571 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8572 break;
8573 nfs4_sequence_free_slot(&lrp->res.seq_res);
8574 rpc_restart_call_prepare(task);
8575 return;
8576 }
8577 dprintk("<-- %s\n", __func__);
8578}
8579
8580static void nfs4_layoutreturn_release(void *calldata)
8581{
8582 struct nfs4_layoutreturn *lrp = calldata;
8583 struct pnfs_layout_hdr *lo = lrp->args.layout;
8584
8585 dprintk("--> %s\n", __func__);
8586 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8587 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8588 nfs4_sequence_free_slot(&lrp->res.seq_res);
8589 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8590 lrp->ld_private.ops->free(&lrp->ld_private);
8591 pnfs_put_layout_hdr(lrp->args.layout);
8592 nfs_iput_and_deactive(lrp->inode);
8593 kfree(calldata);
8594 dprintk("<-- %s\n", __func__);
8595}
8596
8597static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8598 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8599 .rpc_call_done = nfs4_layoutreturn_done,
8600 .rpc_release = nfs4_layoutreturn_release,
8601};
8602
8603int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8604{
8605 struct rpc_task *task;
8606 struct rpc_message msg = {
8607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8608 .rpc_argp = &lrp->args,
8609 .rpc_resp = &lrp->res,
8610 .rpc_cred = lrp->cred,
8611 };
8612 struct rpc_task_setup task_setup_data = {
8613 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8614 .rpc_message = &msg,
8615 .callback_ops = &nfs4_layoutreturn_call_ops,
8616 .callback_data = lrp,
8617 };
8618 int status = 0;
8619
8620 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8621 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8622 &task_setup_data.rpc_client, &msg);
8623
8624 dprintk("--> %s\n", __func__);
8625 if (!sync) {
8626 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8627 if (!lrp->inode) {
8628 nfs4_layoutreturn_release(lrp);
8629 return -EAGAIN;
8630 }
8631 task_setup_data.flags |= RPC_TASK_ASYNC;
8632 }
8633 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8634 task = rpc_run_task(&task_setup_data);
8635 if (IS_ERR(task))
8636 return PTR_ERR(task);
8637 if (sync)
8638 status = task->tk_status;
8639 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8640 dprintk("<-- %s status=%d\n", __func__, status);
8641 rpc_put_task(task);
8642 return status;
8643}
8644
8645static int
8646_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8647 struct pnfs_device *pdev,
8648 struct rpc_cred *cred)
8649{
8650 struct nfs4_getdeviceinfo_args args = {
8651 .pdev = pdev,
8652 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8653 NOTIFY_DEVICEID4_DELETE,
8654 };
8655 struct nfs4_getdeviceinfo_res res = {
8656 .pdev = pdev,
8657 };
8658 struct rpc_message msg = {
8659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8660 .rpc_argp = &args,
8661 .rpc_resp = &res,
8662 .rpc_cred = cred,
8663 };
8664 int status;
8665
8666 dprintk("--> %s\n", __func__);
8667 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8668 if (res.notification & ~args.notify_types)
8669 dprintk("%s: unsupported notification\n", __func__);
8670 if (res.notification != args.notify_types)
8671 pdev->nocache = 1;
8672
8673 dprintk("<-- %s status=%d\n", __func__, status);
8674
8675 return status;
8676}
8677
8678int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8679 struct pnfs_device *pdev,
8680 struct rpc_cred *cred)
8681{
8682 struct nfs4_exception exception = { };
8683 int err;
8684
8685 do {
8686 err = nfs4_handle_exception(server,
8687 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8688 &exception);
8689 } while (exception.retry);
8690 return err;
8691}
8692EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8693
8694static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8695{
8696 struct nfs4_layoutcommit_data *data = calldata;
8697 struct nfs_server *server = NFS_SERVER(data->args.inode);
8698
8699 nfs4_setup_sequence(server->nfs_client,
8700 &data->args.seq_args,
8701 &data->res.seq_res,
8702 task);
8703}
8704
8705static void
8706nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8707{
8708 struct nfs4_layoutcommit_data *data = calldata;
8709 struct nfs_server *server = NFS_SERVER(data->args.inode);
8710
8711 if (!nfs41_sequence_done(task, &data->res.seq_res))
8712 return;
8713
8714 switch (task->tk_status) {
8715 case -NFS4ERR_DELEG_REVOKED:
8716 case -NFS4ERR_BADIOMODE:
8717 case -NFS4ERR_BADLAYOUT:
8718 case -NFS4ERR_GRACE:
8719 task->tk_status = 0;
8720 case 0:
8721 break;
8722 default:
8723 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8724 rpc_restart_call_prepare(task);
8725 return;
8726 }
8727 }
8728}
8729
8730static void nfs4_layoutcommit_release(void *calldata)
8731{
8732 struct nfs4_layoutcommit_data *data = calldata;
8733
8734 pnfs_cleanup_layoutcommit(data);
8735 nfs_post_op_update_inode_force_wcc(data->args.inode,
8736 data->res.fattr);
8737 put_rpccred(data->cred);
8738 nfs_iput_and_deactive(data->inode);
8739 kfree(data);
8740}
8741
8742static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8743 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8744 .rpc_call_done = nfs4_layoutcommit_done,
8745 .rpc_release = nfs4_layoutcommit_release,
8746};
8747
8748int
8749nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8750{
8751 struct rpc_message msg = {
8752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8753 .rpc_argp = &data->args,
8754 .rpc_resp = &data->res,
8755 .rpc_cred = data->cred,
8756 };
8757 struct rpc_task_setup task_setup_data = {
8758 .task = &data->task,
8759 .rpc_client = NFS_CLIENT(data->args.inode),
8760 .rpc_message = &msg,
8761 .callback_ops = &nfs4_layoutcommit_ops,
8762 .callback_data = data,
8763 };
8764 struct rpc_task *task;
8765 int status = 0;
8766
8767 dprintk("NFS: initiating layoutcommit call. sync %d "
8768 "lbw: %llu inode %lu\n", sync,
8769 data->args.lastbytewritten,
8770 data->args.inode->i_ino);
8771
8772 if (!sync) {
8773 data->inode = nfs_igrab_and_active(data->args.inode);
8774 if (data->inode == NULL) {
8775 nfs4_layoutcommit_release(data);
8776 return -EAGAIN;
8777 }
8778 task_setup_data.flags = RPC_TASK_ASYNC;
8779 }
8780 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8781 task = rpc_run_task(&task_setup_data);
8782 if (IS_ERR(task))
8783 return PTR_ERR(task);
8784 if (sync)
8785 status = task->tk_status;
8786 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8787 dprintk("%s: status %d\n", __func__, status);
8788 rpc_put_task(task);
8789 return status;
8790}
8791
8792
8793
8794
8795
8796static int
8797_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8798 struct nfs_fsinfo *info,
8799 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8800{
8801 struct nfs41_secinfo_no_name_args args = {
8802 .style = SECINFO_STYLE_CURRENT_FH,
8803 };
8804 struct nfs4_secinfo_res res = {
8805 .flavors = flavors,
8806 };
8807 struct rpc_message msg = {
8808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8809 .rpc_argp = &args,
8810 .rpc_resp = &res,
8811 };
8812 struct rpc_clnt *clnt = server->client;
8813 struct rpc_cred *cred = NULL;
8814 int status;
8815
8816 if (use_integrity) {
8817 clnt = server->nfs_client->cl_rpcclient;
8818 cred = nfs4_get_clid_cred(server->nfs_client);
8819 msg.rpc_cred = cred;
8820 }
8821
8822 dprintk("--> %s\n", __func__);
8823 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8824 &res.seq_res, 0);
8825 dprintk("<-- %s status=%d\n", __func__, status);
8826
8827 if (cred)
8828 put_rpccred(cred);
8829
8830 return status;
8831}
8832
8833static int
8834nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8835 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8836{
8837 struct nfs4_exception exception = { };
8838 int err;
8839 do {
8840
8841 err = -NFS4ERR_WRONGSEC;
8842
8843
8844 if (_nfs4_is_integrity_protected(server->nfs_client))
8845 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8846 flavors, true);
8847
8848
8849
8850
8851
8852
8853
8854 if (err == -NFS4ERR_WRONGSEC)
8855 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8856 flavors, false);
8857
8858 switch (err) {
8859 case 0:
8860 case -NFS4ERR_WRONGSEC:
8861 case -ENOTSUPP:
8862 goto out;
8863 default:
8864 err = nfs4_handle_exception(server, err, &exception);
8865 }
8866 } while (exception.retry);
8867out:
8868 return err;
8869}
8870
8871static int
8872nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8873 struct nfs_fsinfo *info)
8874{
8875 int err;
8876 struct page *page;
8877 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8878 struct nfs4_secinfo_flavors *flavors;
8879 struct nfs4_secinfo4 *secinfo;
8880 int i;
8881
8882 page = alloc_page(GFP_KERNEL);
8883 if (!page) {
8884 err = -ENOMEM;
8885 goto out;
8886 }
8887
8888 flavors = page_address(page);
8889 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8890
8891
8892
8893
8894
8895 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8896 err = nfs4_find_root_sec(server, fhandle, info);
8897 goto out_freepage;
8898 }
8899 if (err)
8900 goto out_freepage;
8901
8902 for (i = 0; i < flavors->num_flavors; i++) {
8903 secinfo = &flavors->flavors[i];
8904
8905 switch (secinfo->flavor) {
8906 case RPC_AUTH_NULL:
8907 case RPC_AUTH_UNIX:
8908 case RPC_AUTH_GSS:
8909 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8910 &secinfo->flavor_info);
8911 break;
8912 default:
8913 flavor = RPC_AUTH_MAXFLAVOR;
8914 break;
8915 }
8916
8917 if (!nfs_auth_info_match(&server->auth_info, flavor))
8918 flavor = RPC_AUTH_MAXFLAVOR;
8919
8920 if (flavor != RPC_AUTH_MAXFLAVOR) {
8921 err = nfs4_lookup_root_sec(server, fhandle,
8922 info, flavor);
8923 if (!err)
8924 break;
8925 }
8926 }
8927
8928 if (flavor == RPC_AUTH_MAXFLAVOR)
8929 err = -EPERM;
8930
8931out_freepage:
8932 put_page(page);
8933 if (err == -EACCES)
8934 return -EPERM;
8935out:
8936 return err;
8937}
8938
8939static int _nfs41_test_stateid(struct nfs_server *server,
8940 nfs4_stateid *stateid,
8941 struct rpc_cred *cred)
8942{
8943 int status;
8944 struct nfs41_test_stateid_args args = {
8945 .stateid = stateid,
8946 };
8947 struct nfs41_test_stateid_res res;
8948 struct rpc_message msg = {
8949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8950 .rpc_argp = &args,
8951 .rpc_resp = &res,
8952 .rpc_cred = cred,
8953 };
8954 struct rpc_clnt *rpc_client = server->client;
8955
8956 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8957 &rpc_client, &msg);
8958
8959 dprintk("NFS call test_stateid %p\n", stateid);
8960 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8961 nfs4_set_sequence_privileged(&args.seq_args);
8962 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8963 &args.seq_args, &res.seq_res);
8964 if (status != NFS_OK) {
8965 dprintk("NFS reply test_stateid: failed, %d\n", status);
8966 return status;
8967 }
8968 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8969 return -res.status;
8970}
8971
8972static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8973 int err, struct nfs4_exception *exception)
8974{
8975 exception->retry = 0;
8976 switch(err) {
8977 case -NFS4ERR_DELAY:
8978 case -NFS4ERR_RETRY_UNCACHED_REP:
8979 nfs4_handle_exception(server, err, exception);
8980 break;
8981 case -NFS4ERR_BADSESSION:
8982 case -NFS4ERR_BADSLOT:
8983 case -NFS4ERR_BAD_HIGH_SLOT:
8984 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8985 case -NFS4ERR_DEADSESSION:
8986 nfs4_do_handle_exception(server, err, exception);
8987 }
8988}
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001static int nfs41_test_stateid(struct nfs_server *server,
9002 nfs4_stateid *stateid,
9003 struct rpc_cred *cred)
9004{
9005 struct nfs4_exception exception = { };
9006 int err;
9007 do {
9008 err = _nfs41_test_stateid(server, stateid, cred);
9009 nfs4_handle_delay_or_session_error(server, err, &exception);
9010 } while (exception.retry);
9011 return err;
9012}
9013
9014struct nfs_free_stateid_data {
9015 struct nfs_server *server;
9016 struct nfs41_free_stateid_args args;
9017 struct nfs41_free_stateid_res res;
9018};
9019
9020static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9021{
9022 struct nfs_free_stateid_data *data = calldata;
9023 nfs4_setup_sequence(data->server->nfs_client,
9024 &data->args.seq_args,
9025 &data->res.seq_res,
9026 task);
9027}
9028
9029static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9030{
9031 struct nfs_free_stateid_data *data = calldata;
9032
9033 nfs41_sequence_done(task, &data->res.seq_res);
9034
9035 switch (task->tk_status) {
9036 case -NFS4ERR_DELAY:
9037 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9038 rpc_restart_call_prepare(task);
9039 }
9040}
9041
9042static void nfs41_free_stateid_release(void *calldata)
9043{
9044 kfree(calldata);
9045}
9046
9047static const struct rpc_call_ops nfs41_free_stateid_ops = {
9048 .rpc_call_prepare = nfs41_free_stateid_prepare,
9049 .rpc_call_done = nfs41_free_stateid_done,
9050 .rpc_release = nfs41_free_stateid_release,
9051};
9052
9053static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9054 const nfs4_stateid *stateid,
9055 struct rpc_cred *cred,
9056 bool privileged)
9057{
9058 struct rpc_message msg = {
9059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9060 .rpc_cred = cred,
9061 };
9062 struct rpc_task_setup task_setup = {
9063 .rpc_client = server->client,
9064 .rpc_message = &msg,
9065 .callback_ops = &nfs41_free_stateid_ops,
9066 .flags = RPC_TASK_ASYNC,
9067 };
9068 struct nfs_free_stateid_data *data;
9069
9070 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9071 &task_setup.rpc_client, &msg);
9072
9073 dprintk("NFS call free_stateid %p\n", stateid);
9074 data = kmalloc(sizeof(*data), GFP_NOFS);
9075 if (!data)
9076 return ERR_PTR(-ENOMEM);
9077 data->server = server;
9078 nfs4_stateid_copy(&data->args.stateid, stateid);
9079
9080 task_setup.callback_data = data;
9081
9082 msg.rpc_argp = &data->args;
9083 msg.rpc_resp = &data->res;
9084 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9085 if (privileged)
9086 nfs4_set_sequence_privileged(&data->args.seq_args);
9087
9088 return rpc_run_task(&task_setup);
9089}
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101static int nfs41_free_stateid(struct nfs_server *server,
9102 const nfs4_stateid *stateid,
9103 struct rpc_cred *cred,
9104 bool is_recovery)
9105{
9106 struct rpc_task *task;
9107
9108 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9109 if (IS_ERR(task))
9110 return PTR_ERR(task);
9111 rpc_put_task(task);
9112 return 0;
9113}
9114
9115static void
9116nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9117{
9118 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9119
9120 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9121 nfs4_free_lock_state(server, lsp);
9122}
9123
9124static bool nfs41_match_stateid(const nfs4_stateid *s1,
9125 const nfs4_stateid *s2)
9126{
9127 if (s1->type != s2->type)
9128 return false;
9129
9130 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9131 return false;
9132
9133 if (s1->seqid == s2->seqid)
9134 return true;
9135
9136 return s1->seqid == 0 || s2->seqid == 0;
9137}
9138
9139#endif
9140
9141static bool nfs4_match_stateid(const nfs4_stateid *s1,
9142 const nfs4_stateid *s2)
9143{
9144 return nfs4_stateid_match(s1, s2);
9145}
9146
9147
9148static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9149 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9150 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9151 .recover_open = nfs4_open_reclaim,
9152 .recover_lock = nfs4_lock_reclaim,
9153 .establish_clid = nfs4_init_clientid,
9154 .detect_trunking = nfs40_discover_server_trunking,
9155};
9156
9157#if defined(CONFIG_NFS_V4_1)
9158static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9159 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9160 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9161 .recover_open = nfs4_open_reclaim,
9162 .recover_lock = nfs4_lock_reclaim,
9163 .establish_clid = nfs41_init_clientid,
9164 .reclaim_complete = nfs41_proc_reclaim_complete,
9165 .detect_trunking = nfs41_discover_server_trunking,
9166};
9167#endif
9168
9169static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9170 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9171 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9172 .recover_open = nfs40_open_expired,
9173 .recover_lock = nfs4_lock_expired,
9174 .establish_clid = nfs4_init_clientid,
9175};
9176
9177#if defined(CONFIG_NFS_V4_1)
9178static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9179 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9180 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9181 .recover_open = nfs41_open_expired,
9182 .recover_lock = nfs41_lock_expired,
9183 .establish_clid = nfs41_init_clientid,
9184};
9185#endif
9186
9187static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9188 .sched_state_renewal = nfs4_proc_async_renew,
9189 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9190 .renew_lease = nfs4_proc_renew,
9191};
9192
9193#if defined(CONFIG_NFS_V4_1)
9194static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9195 .sched_state_renewal = nfs41_proc_async_sequence,
9196 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9197 .renew_lease = nfs4_proc_sequence,
9198};
9199#endif
9200
9201static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9202 .get_locations = _nfs40_proc_get_locations,
9203 .fsid_present = _nfs40_proc_fsid_present,
9204};
9205
9206#if defined(CONFIG_NFS_V4_1)
9207static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9208 .get_locations = _nfs41_proc_get_locations,
9209 .fsid_present = _nfs41_proc_fsid_present,
9210};
9211#endif
9212
9213static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9214 .minor_version = 0,
9215 .init_caps = NFS_CAP_READDIRPLUS
9216 | NFS_CAP_ATOMIC_OPEN
9217 | NFS_CAP_POSIX_LOCK,
9218 .init_client = nfs40_init_client,
9219 .shutdown_client = nfs40_shutdown_client,
9220 .match_stateid = nfs4_match_stateid,
9221 .find_root_sec = nfs4_find_root_sec,
9222 .free_lock_state = nfs4_release_lockowner,
9223 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9224 .alloc_seqid = nfs_alloc_seqid,
9225 .call_sync_ops = &nfs40_call_sync_ops,
9226 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9227 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9228 .state_renewal_ops = &nfs40_state_renewal_ops,
9229 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9230};
9231
9232#if defined(CONFIG_NFS_V4_1)
9233static struct nfs_seqid *
9234nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9235{
9236 return NULL;
9237}
9238
9239static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9240 .minor_version = 1,
9241 .init_caps = NFS_CAP_READDIRPLUS
9242 | NFS_CAP_ATOMIC_OPEN
9243 | NFS_CAP_POSIX_LOCK
9244 | NFS_CAP_STATEID_NFSV41
9245 | NFS_CAP_ATOMIC_OPEN_V1,
9246 .init_client = nfs41_init_client,
9247 .shutdown_client = nfs41_shutdown_client,
9248 .match_stateid = nfs41_match_stateid,
9249 .find_root_sec = nfs41_find_root_sec,
9250 .free_lock_state = nfs41_free_lock_state,
9251 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9252 .alloc_seqid = nfs_alloc_no_seqid,
9253 .session_trunk = nfs4_test_session_trunk,
9254 .call_sync_ops = &nfs41_call_sync_ops,
9255 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9256 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9257 .state_renewal_ops = &nfs41_state_renewal_ops,
9258 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9259};
9260#endif
9261
9262#if defined(CONFIG_NFS_V4_2)
9263static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9264 .minor_version = 2,
9265 .init_caps = NFS_CAP_READDIRPLUS
9266 | NFS_CAP_ATOMIC_OPEN
9267 | NFS_CAP_POSIX_LOCK
9268 | NFS_CAP_STATEID_NFSV41
9269 | NFS_CAP_ATOMIC_OPEN_V1
9270 | NFS_CAP_ALLOCATE
9271 | NFS_CAP_COPY
9272 | NFS_CAP_DEALLOCATE
9273 | NFS_CAP_SEEK
9274 | NFS_CAP_LAYOUTSTATS
9275 | NFS_CAP_CLONE,
9276 .init_client = nfs41_init_client,
9277 .shutdown_client = nfs41_shutdown_client,
9278 .match_stateid = nfs41_match_stateid,
9279 .find_root_sec = nfs41_find_root_sec,
9280 .free_lock_state = nfs41_free_lock_state,
9281 .call_sync_ops = &nfs41_call_sync_ops,
9282 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9283 .alloc_seqid = nfs_alloc_no_seqid,
9284 .session_trunk = nfs4_test_session_trunk,
9285 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9286 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9287 .state_renewal_ops = &nfs41_state_renewal_ops,
9288 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9289};
9290#endif
9291
9292const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9293 [0] = &nfs_v4_0_minor_ops,
9294#if defined(CONFIG_NFS_V4_1)
9295 [1] = &nfs_v4_1_minor_ops,
9296#endif
9297#if defined(CONFIG_NFS_V4_2)
9298 [2] = &nfs_v4_2_minor_ops,
9299#endif
9300};
9301
9302static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9303{
9304 ssize_t error, error2;
9305
9306 error = generic_listxattr(dentry, list, size);
9307 if (error < 0)
9308 return error;
9309 if (list) {
9310 list += error;
9311 size -= error;
9312 }
9313
9314 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9315 if (error2 < 0)
9316 return error2;
9317 return error + error2;
9318}
9319
9320static const struct inode_operations nfs4_dir_inode_operations = {
9321 .create = nfs_create,
9322 .lookup = nfs_lookup,
9323 .atomic_open = nfs_atomic_open,
9324 .link = nfs_link,
9325 .unlink = nfs_unlink,
9326 .symlink = nfs_symlink,
9327 .mkdir = nfs_mkdir,
9328 .rmdir = nfs_rmdir,
9329 .mknod = nfs_mknod,
9330 .rename = nfs_rename,
9331 .permission = nfs_permission,
9332 .getattr = nfs_getattr,
9333 .setattr = nfs_setattr,
9334 .listxattr = nfs4_listxattr,
9335};
9336
9337static const struct inode_operations nfs4_file_inode_operations = {
9338 .permission = nfs_permission,
9339 .getattr = nfs_getattr,
9340 .setattr = nfs_setattr,
9341 .listxattr = nfs4_listxattr,
9342};
9343
9344const struct nfs_rpc_ops nfs_v4_clientops = {
9345 .version = 4,
9346 .dentry_ops = &nfs4_dentry_operations,
9347 .dir_inode_ops = &nfs4_dir_inode_operations,
9348 .file_inode_ops = &nfs4_file_inode_operations,
9349 .file_ops = &nfs4_file_operations,
9350 .getroot = nfs4_proc_get_root,
9351 .submount = nfs4_submount,
9352 .try_mount = nfs4_try_mount,
9353 .getattr = nfs4_proc_getattr,
9354 .setattr = nfs4_proc_setattr,
9355 .lookup = nfs4_proc_lookup,
9356 .lookupp = nfs4_proc_lookupp,
9357 .access = nfs4_proc_access,
9358 .readlink = nfs4_proc_readlink,
9359 .create = nfs4_proc_create,
9360 .remove = nfs4_proc_remove,
9361 .unlink_setup = nfs4_proc_unlink_setup,
9362 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9363 .unlink_done = nfs4_proc_unlink_done,
9364 .rename_setup = nfs4_proc_rename_setup,
9365 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9366 .rename_done = nfs4_proc_rename_done,
9367 .link = nfs4_proc_link,
9368 .symlink = nfs4_proc_symlink,
9369 .mkdir = nfs4_proc_mkdir,
9370 .rmdir = nfs4_proc_remove,
9371 .readdir = nfs4_proc_readdir,
9372 .mknod = nfs4_proc_mknod,
9373 .statfs = nfs4_proc_statfs,
9374 .fsinfo = nfs4_proc_fsinfo,
9375 .pathconf = nfs4_proc_pathconf,
9376 .set_capabilities = nfs4_server_capabilities,
9377 .decode_dirent = nfs4_decode_dirent,
9378 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9379 .read_setup = nfs4_proc_read_setup,
9380 .read_done = nfs4_read_done,
9381 .write_setup = nfs4_proc_write_setup,
9382 .write_done = nfs4_write_done,
9383 .commit_setup = nfs4_proc_commit_setup,
9384 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9385 .commit_done = nfs4_commit_done,
9386 .lock = nfs4_proc_lock,
9387 .clear_acl_cache = nfs4_zap_acl_attr,
9388 .close_context = nfs4_close_context,
9389 .open_context = nfs4_atomic_open,
9390 .have_delegation = nfs4_have_delegation,
9391 .return_delegation = nfs4_inode_return_delegation,
9392 .alloc_client = nfs4_alloc_client,
9393 .init_client = nfs4_init_client,
9394 .free_client = nfs4_free_client,
9395 .create_server = nfs4_create_server,
9396 .clone_server = nfs_clone_server,
9397};
9398
9399static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9400 .name = XATTR_NAME_NFSV4_ACL,
9401 .list = nfs4_xattr_list_nfs4_acl,
9402 .get = nfs4_xattr_get_nfs4_acl,
9403 .set = nfs4_xattr_set_nfs4_acl,
9404};
9405
9406const struct xattr_handler *nfs4_xattr_handlers[] = {
9407 &nfs4_xattr_nfs4_acl_handler,
9408#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9409 &nfs4_xattr_nfs4_label_handler,
9410#endif
9411 NULL
9412};
9413
9414
9415
9416
9417
9418
9419