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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#include <linux/iversion.h>
58
59#include "nfs4_fs.h"
60#include "delegation.h"
61#include "internal.h"
62#include "iostat.h"
63#include "callback.h"
64#include "pnfs.h"
65#include "netns.h"
66#include "nfs4idmap.h"
67#include "nfs4session.h"
68#include "fscache.h"
69
70#include "nfs4trace.h"
71
72#define NFSDBG_FACILITY NFSDBG_PROC
73
74#define NFS4_BITMASK_SZ 3
75
76#define NFS4_POLL_RETRY_MIN (HZ/10)
77#define NFS4_POLL_RETRY_MAX (15*HZ)
78
79
80#define NFS4_VALID_ATTRS (ATTR_MODE \
81 | ATTR_UID \
82 | ATTR_GID \
83 | ATTR_SIZE \
84 | ATTR_ATIME \
85 | ATTR_MTIME \
86 | ATTR_CTIME \
87 | ATTR_ATIME_SET \
88 | ATTR_MTIME_SET)
89
90struct nfs4_opendata;
91static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
92static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
93static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
94static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode);
95static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
96static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
97 struct nfs_fattr *fattr, struct iattr *sattr,
98 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
99 struct nfs4_label *olabel);
100#ifdef CONFIG_NFS_V4_1
101static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
102 const struct cred *cred,
103 struct nfs4_slot *slot,
104 bool is_privileged);
105static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
106 const struct cred *);
107static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
108 const struct cred *, bool);
109#endif
110
111#ifdef CONFIG_NFS_V4_SECURITY_LABEL
112static inline struct nfs4_label *
113nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
114 struct iattr *sattr, struct nfs4_label *label)
115{
116 int err;
117
118 if (label == NULL)
119 return NULL;
120
121 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
122 return NULL;
123
124 err = security_dentry_init_security(dentry, sattr->ia_mode,
125 &dentry->d_name, (void **)&label->label, &label->len);
126 if (err == 0)
127 return label;
128
129 return NULL;
130}
131static inline void
132nfs4_label_release_security(struct nfs4_label *label)
133{
134 if (label)
135 security_release_secctx(label->label, label->len);
136}
137static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{
139 if (label)
140 return server->attr_bitmask;
141
142 return server->attr_bitmask_nl;
143}
144#else
145static inline struct nfs4_label *
146nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
147 struct iattr *sattr, struct nfs4_label *l)
148{ return NULL; }
149static inline void
150nfs4_label_release_security(struct nfs4_label *label)
151{ return; }
152static inline u32 *
153nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
154{ return server->attr_bitmask; }
155#endif
156
157
158static int nfs4_map_errors(int err)
159{
160 if (err >= -1000)
161 return err;
162 switch (err) {
163 case -NFS4ERR_RESOURCE:
164 case -NFS4ERR_LAYOUTTRYLATER:
165 case -NFS4ERR_RECALLCONFLICT:
166 return -EREMOTEIO;
167 case -NFS4ERR_WRONGSEC:
168 case -NFS4ERR_WRONG_CRED:
169 return -EPERM;
170 case -NFS4ERR_BADOWNER:
171 case -NFS4ERR_BADNAME:
172 return -EINVAL;
173 case -NFS4ERR_SHARE_DENIED:
174 return -EACCES;
175 case -NFS4ERR_MINOR_VERS_MISMATCH:
176 return -EPROTONOSUPPORT;
177 case -NFS4ERR_FILE_OPEN:
178 return -EBUSY;
179 default:
180 dprintk("%s could not handle NFSv4 error %d\n",
181 __func__, -err);
182 break;
183 }
184 return -EIO;
185}
186
187
188
189
190const u32 nfs4_fattr_bitmap[3] = {
191 FATTR4_WORD0_TYPE
192 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_SIZE
194 | FATTR4_WORD0_FSID
195 | FATTR4_WORD0_FILEID,
196 FATTR4_WORD1_MODE
197 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER
199 | FATTR4_WORD1_OWNER_GROUP
200 | FATTR4_WORD1_RAWDEV
201 | FATTR4_WORD1_SPACE_USED
202 | FATTR4_WORD1_TIME_ACCESS
203 | FATTR4_WORD1_TIME_METADATA
204 | FATTR4_WORD1_TIME_MODIFY
205 | FATTR4_WORD1_MOUNTED_ON_FILEID,
206#ifdef CONFIG_NFS_V4_SECURITY_LABEL
207 FATTR4_WORD2_SECURITY_LABEL
208#endif
209};
210
211static const u32 nfs4_pnfs_open_bitmap[3] = {
212 FATTR4_WORD0_TYPE
213 | FATTR4_WORD0_CHANGE
214 | FATTR4_WORD0_SIZE
215 | FATTR4_WORD0_FSID
216 | FATTR4_WORD0_FILEID,
217 FATTR4_WORD1_MODE
218 | FATTR4_WORD1_NUMLINKS
219 | FATTR4_WORD1_OWNER
220 | FATTR4_WORD1_OWNER_GROUP
221 | FATTR4_WORD1_RAWDEV
222 | FATTR4_WORD1_SPACE_USED
223 | FATTR4_WORD1_TIME_ACCESS
224 | FATTR4_WORD1_TIME_METADATA
225 | FATTR4_WORD1_TIME_MODIFY,
226 FATTR4_WORD2_MDSTHRESHOLD
227#ifdef CONFIG_NFS_V4_SECURITY_LABEL
228 | FATTR4_WORD2_SECURITY_LABEL
229#endif
230};
231
232static const u32 nfs4_open_noattr_bitmap[3] = {
233 FATTR4_WORD0_TYPE
234 | FATTR4_WORD0_FILEID,
235};
236
237const u32 nfs4_statfs_bitmap[3] = {
238 FATTR4_WORD0_FILES_AVAIL
239 | FATTR4_WORD0_FILES_FREE
240 | FATTR4_WORD0_FILES_TOTAL,
241 FATTR4_WORD1_SPACE_AVAIL
242 | FATTR4_WORD1_SPACE_FREE
243 | FATTR4_WORD1_SPACE_TOTAL
244};
245
246const u32 nfs4_pathconf_bitmap[3] = {
247 FATTR4_WORD0_MAXLINK
248 | FATTR4_WORD0_MAXNAME,
249 0
250};
251
252const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
253 | FATTR4_WORD0_MAXREAD
254 | FATTR4_WORD0_MAXWRITE
255 | FATTR4_WORD0_LEASE_TIME,
256 FATTR4_WORD1_TIME_DELTA
257 | FATTR4_WORD1_FS_LAYOUT_TYPES,
258 FATTR4_WORD2_LAYOUT_BLKSIZE
259 | FATTR4_WORD2_CLONE_BLKSIZE
260};
261
262const u32 nfs4_fs_locations_bitmap[3] = {
263 FATTR4_WORD0_CHANGE
264 | FATTR4_WORD0_SIZE
265 | FATTR4_WORD0_FSID
266 | FATTR4_WORD0_FILEID
267 | FATTR4_WORD0_FS_LOCATIONS,
268 FATTR4_WORD1_OWNER
269 | FATTR4_WORD1_OWNER_GROUP
270 | FATTR4_WORD1_RAWDEV
271 | FATTR4_WORD1_SPACE_USED
272 | FATTR4_WORD1_TIME_ACCESS
273 | FATTR4_WORD1_TIME_METADATA
274 | FATTR4_WORD1_TIME_MODIFY
275 | FATTR4_WORD1_MOUNTED_ON_FILEID,
276};
277
278static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
279 struct inode *inode)
280{
281 unsigned long cache_validity;
282
283 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
284 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
285 return;
286
287 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
288 if (!(cache_validity & NFS_INO_REVAL_FORCED))
289 cache_validity &= ~(NFS_INO_INVALID_CHANGE
290 | NFS_INO_INVALID_SIZE);
291
292 if (!(cache_validity & NFS_INO_INVALID_SIZE))
293 dst[0] &= ~FATTR4_WORD0_SIZE;
294
295 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
296 dst[0] &= ~FATTR4_WORD0_CHANGE;
297}
298
299static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
300 const __u32 *src, struct inode *inode)
301{
302 nfs4_bitmap_copy_adjust(dst, src, inode);
303}
304
305static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
306 struct nfs4_readdir_arg *readdir)
307{
308 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
309 __be32 *start, *p;
310
311 if (cookie > 2) {
312 readdir->cookie = cookie;
313 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
314 return;
315 }
316
317 readdir->cookie = 0;
318 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
319 if (cookie == 2)
320 return;
321
322
323
324
325
326
327
328
329 start = p = kmap_atomic(*readdir->pages);
330
331 if (cookie == 0) {
332 *p++ = xdr_one;
333 *p++ = xdr_zero;
334 *p++ = xdr_one;
335 *p++ = xdr_one;
336 memcpy(p, ".\0\0\0", 4);
337 p++;
338 *p++ = xdr_one;
339 *p++ = htonl(attrs);
340 *p++ = htonl(12);
341 *p++ = htonl(NF4DIR);
342 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
343 }
344
345 *p++ = xdr_one;
346 *p++ = xdr_zero;
347 *p++ = xdr_two;
348 *p++ = xdr_two;
349 memcpy(p, "..\0\0", 4);
350 p++;
351 *p++ = xdr_one;
352 *p++ = htonl(attrs);
353 *p++ = htonl(12);
354 *p++ = htonl(NF4DIR);
355 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
356
357 readdir->pgbase = (char *)p - (char *)start;
358 readdir->count -= readdir->pgbase;
359 kunmap_atomic(start);
360}
361
362static void nfs4_test_and_free_stateid(struct nfs_server *server,
363 nfs4_stateid *stateid,
364 const struct cred *cred)
365{
366 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
367
368 ops->test_and_free_expired(server, stateid, cred);
369}
370
371static void __nfs4_free_revoked_stateid(struct nfs_server *server,
372 nfs4_stateid *stateid,
373 const struct cred *cred)
374{
375 stateid->type = NFS4_REVOKED_STATEID_TYPE;
376 nfs4_test_and_free_stateid(server, stateid, cred);
377}
378
379static void nfs4_free_revoked_stateid(struct nfs_server *server,
380 const nfs4_stateid *stateid,
381 const struct cred *cred)
382{
383 nfs4_stateid tmp;
384
385 nfs4_stateid_copy(&tmp, stateid);
386 __nfs4_free_revoked_stateid(server, &tmp, cred);
387}
388
389static long nfs4_update_delay(long *timeout)
390{
391 long ret;
392 if (!timeout)
393 return NFS4_POLL_RETRY_MAX;
394 if (*timeout <= 0)
395 *timeout = NFS4_POLL_RETRY_MIN;
396 if (*timeout > NFS4_POLL_RETRY_MAX)
397 *timeout = NFS4_POLL_RETRY_MAX;
398 ret = *timeout;
399 *timeout <<= 1;
400 return ret;
401}
402
403static int nfs4_delay_killable(long *timeout)
404{
405 might_sleep();
406
407 freezable_schedule_timeout_killable_unsafe(
408 nfs4_update_delay(timeout));
409 if (!__fatal_signal_pending(current))
410 return 0;
411 return -EINTR;
412}
413
414static int nfs4_delay_interruptible(long *timeout)
415{
416 might_sleep();
417
418 freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout));
419 if (!signal_pending(current))
420 return 0;
421 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
422}
423
424static int nfs4_delay(long *timeout, bool interruptible)
425{
426 if (interruptible)
427 return nfs4_delay_interruptible(timeout);
428 return nfs4_delay_killable(timeout);
429}
430
431static const nfs4_stateid *
432nfs4_recoverable_stateid(const nfs4_stateid *stateid)
433{
434 if (!stateid)
435 return NULL;
436 switch (stateid->type) {
437 case NFS4_OPEN_STATEID_TYPE:
438 case NFS4_LOCK_STATEID_TYPE:
439 case NFS4_DELEGATION_STATEID_TYPE:
440 return stateid;
441 default:
442 break;
443 }
444 return NULL;
445}
446
447
448
449
450static int nfs4_do_handle_exception(struct nfs_server *server,
451 int errorcode, struct nfs4_exception *exception)
452{
453 struct nfs_client *clp = server->nfs_client;
454 struct nfs4_state *state = exception->state;
455 const nfs4_stateid *stateid;
456 struct inode *inode = exception->inode;
457 int ret = errorcode;
458
459 exception->delay = 0;
460 exception->recovering = 0;
461 exception->retry = 0;
462
463 stateid = nfs4_recoverable_stateid(exception->stateid);
464 if (stateid == NULL && state != NULL)
465 stateid = nfs4_recoverable_stateid(&state->stateid);
466
467 switch(errorcode) {
468 case 0:
469 return 0;
470 case -NFS4ERR_BADHANDLE:
471 case -ESTALE:
472 if (inode != NULL && S_ISREG(inode->i_mode))
473 pnfs_destroy_layout(NFS_I(inode));
474 break;
475 case -NFS4ERR_DELEG_REVOKED:
476 case -NFS4ERR_ADMIN_REVOKED:
477 case -NFS4ERR_EXPIRED:
478 case -NFS4ERR_BAD_STATEID:
479 if (inode != NULL && stateid != NULL) {
480 nfs_inode_find_state_and_recover(inode,
481 stateid);
482 goto wait_on_recovery;
483 }
484
485 case -NFS4ERR_OPENMODE:
486 if (inode) {
487 int err;
488
489 err = nfs_async_inode_return_delegation(inode,
490 stateid);
491 if (err == 0)
492 goto wait_on_recovery;
493 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
494 exception->retry = 1;
495 break;
496 }
497 }
498 if (state == NULL)
499 break;
500 ret = nfs4_schedule_stateid_recovery(server, state);
501 if (ret < 0)
502 break;
503 goto wait_on_recovery;
504 case -NFS4ERR_STALE_STATEID:
505 case -NFS4ERR_STALE_CLIENTID:
506 nfs4_schedule_lease_recovery(clp);
507 goto wait_on_recovery;
508 case -NFS4ERR_MOVED:
509 ret = nfs4_schedule_migration_recovery(server);
510 if (ret < 0)
511 break;
512 goto wait_on_recovery;
513 case -NFS4ERR_LEASE_MOVED:
514 nfs4_schedule_lease_moved_recovery(clp);
515 goto wait_on_recovery;
516#if defined(CONFIG_NFS_V4_1)
517 case -NFS4ERR_BADSESSION:
518 case -NFS4ERR_BADSLOT:
519 case -NFS4ERR_BAD_HIGH_SLOT:
520 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
521 case -NFS4ERR_DEADSESSION:
522 case -NFS4ERR_SEQ_FALSE_RETRY:
523 case -NFS4ERR_SEQ_MISORDERED:
524 dprintk("%s ERROR: %d Reset session\n", __func__,
525 errorcode);
526 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
527 goto wait_on_recovery;
528#endif
529 case -NFS4ERR_FILE_OPEN:
530 if (exception->timeout > HZ) {
531
532
533
534 ret = -EBUSY;
535 break;
536 }
537
538 case -NFS4ERR_DELAY:
539 nfs_inc_server_stats(server, NFSIOS_DELAY);
540
541 case -NFS4ERR_GRACE:
542 case -NFS4ERR_LAYOUTTRYLATER:
543 case -NFS4ERR_RECALLCONFLICT:
544 exception->delay = 1;
545 return 0;
546
547 case -NFS4ERR_RETRY_UNCACHED_REP:
548 case -NFS4ERR_OLD_STATEID:
549 exception->retry = 1;
550 break;
551 case -NFS4ERR_BADOWNER:
552
553 case -NFS4ERR_BADNAME:
554 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
555 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
556 exception->retry = 1;
557 printk(KERN_WARNING "NFS: v4 server %s "
558 "does not accept raw "
559 "uid/gids. "
560 "Reenabling the idmapper.\n",
561 server->nfs_client->cl_hostname);
562 }
563 }
564
565 return nfs4_map_errors(ret);
566wait_on_recovery:
567 exception->recovering = 1;
568 return 0;
569}
570
571
572
573
574int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
575{
576 struct nfs_client *clp = server->nfs_client;
577 int ret;
578
579 ret = nfs4_do_handle_exception(server, errorcode, exception);
580 if (exception->delay) {
581 ret = nfs4_delay(&exception->timeout,
582 exception->interruptible);
583 goto out_retry;
584 }
585 if (exception->recovering) {
586 ret = nfs4_wait_clnt_recover(clp);
587 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
588 return -EIO;
589 goto out_retry;
590 }
591 return ret;
592out_retry:
593 if (ret == 0)
594 exception->retry = 1;
595 return ret;
596}
597
598static int
599nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
600 int errorcode, struct nfs4_exception *exception)
601{
602 struct nfs_client *clp = server->nfs_client;
603 int ret;
604
605 ret = nfs4_do_handle_exception(server, errorcode, exception);
606 if (exception->delay) {
607 rpc_delay(task, nfs4_update_delay(&exception->timeout));
608 goto out_retry;
609 }
610 if (exception->recovering) {
611 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
612 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
613 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
614 goto out_retry;
615 }
616 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
617 ret = -EIO;
618 return ret;
619out_retry:
620 if (ret == 0) {
621 exception->retry = 1;
622
623
624
625
626 if (errorcode == -NFS4ERR_MOVED)
627 rpc_task_release_transport(task);
628 }
629 return ret;
630}
631
632int
633nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
634 struct nfs4_state *state, long *timeout)
635{
636 struct nfs4_exception exception = {
637 .state = state,
638 };
639
640 if (task->tk_status >= 0)
641 return 0;
642 if (timeout)
643 exception.timeout = *timeout;
644 task->tk_status = nfs4_async_handle_exception(task, server,
645 task->tk_status,
646 &exception);
647 if (exception.delay && timeout)
648 *timeout = exception.timeout;
649 if (exception.retry)
650 return -EAGAIN;
651 return 0;
652}
653
654
655
656
657
658static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
659{
660 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
661 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
662}
663
664static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
665{
666 spin_lock(&clp->cl_lock);
667 if (time_before(clp->cl_last_renewal,timestamp))
668 clp->cl_last_renewal = timestamp;
669 spin_unlock(&clp->cl_lock);
670}
671
672static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
673{
674 struct nfs_client *clp = server->nfs_client;
675
676 if (!nfs4_has_session(clp))
677 do_renew_lease(clp, timestamp);
678}
679
680struct nfs4_call_sync_data {
681 const struct nfs_server *seq_server;
682 struct nfs4_sequence_args *seq_args;
683 struct nfs4_sequence_res *seq_res;
684};
685
686void nfs4_init_sequence(struct nfs4_sequence_args *args,
687 struct nfs4_sequence_res *res, int cache_reply,
688 int privileged)
689{
690 args->sa_slot = NULL;
691 args->sa_cache_this = cache_reply;
692 args->sa_privileged = privileged;
693
694 res->sr_slot = NULL;
695}
696
697static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
698{
699 struct nfs4_slot *slot = res->sr_slot;
700 struct nfs4_slot_table *tbl;
701
702 tbl = slot->table;
703 spin_lock(&tbl->slot_tbl_lock);
704 if (!nfs41_wake_and_assign_slot(tbl, slot))
705 nfs4_free_slot(tbl, slot);
706 spin_unlock(&tbl->slot_tbl_lock);
707
708 res->sr_slot = NULL;
709}
710
711static int nfs40_sequence_done(struct rpc_task *task,
712 struct nfs4_sequence_res *res)
713{
714 if (res->sr_slot != NULL)
715 nfs40_sequence_free_slot(res);
716 return 1;
717}
718
719#if defined(CONFIG_NFS_V4_1)
720
721static void nfs41_release_slot(struct nfs4_slot *slot)
722{
723 struct nfs4_session *session;
724 struct nfs4_slot_table *tbl;
725 bool send_new_highest_used_slotid = false;
726
727 if (!slot)
728 return;
729 tbl = slot->table;
730 session = tbl->session;
731
732
733 if (slot->seq_done)
734 slot->seq_nr++;
735 slot->seq_done = 0;
736
737 spin_lock(&tbl->slot_tbl_lock);
738
739
740
741 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
742 send_new_highest_used_slotid = true;
743
744 if (nfs41_wake_and_assign_slot(tbl, slot)) {
745 send_new_highest_used_slotid = false;
746 goto out_unlock;
747 }
748 nfs4_free_slot(tbl, slot);
749
750 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
751 send_new_highest_used_slotid = false;
752out_unlock:
753 spin_unlock(&tbl->slot_tbl_lock);
754 if (send_new_highest_used_slotid)
755 nfs41_notify_server(session->clp);
756 if (waitqueue_active(&tbl->slot_waitq))
757 wake_up_all(&tbl->slot_waitq);
758}
759
760static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
761{
762 nfs41_release_slot(res->sr_slot);
763 res->sr_slot = NULL;
764}
765
766static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
767 u32 seqnr)
768{
769 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
770 slot->seq_nr_highest_sent = seqnr;
771}
772static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
773 u32 seqnr)
774{
775 slot->seq_nr_highest_sent = seqnr;
776 slot->seq_nr_last_acked = seqnr;
777}
778
779static int nfs41_sequence_process(struct rpc_task *task,
780 struct nfs4_sequence_res *res)
781{
782 struct nfs4_session *session;
783 struct nfs4_slot *slot = res->sr_slot;
784 struct nfs_client *clp;
785 int ret = 1;
786
787 if (slot == NULL)
788 goto out_noaction;
789
790 if (!RPC_WAS_SENT(task) || slot->seq_done)
791 goto out;
792
793 session = slot->table->session;
794
795 trace_nfs4_sequence_done(session, res);
796
797 switch (res->sr_status) {
798 case 0:
799
800 nfs4_slot_sequence_acked(slot, slot->seq_nr);
801
802 slot->seq_done = 1;
803 clp = session->clp;
804 do_renew_lease(clp, res->sr_timestamp);
805
806 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
807 !!slot->privileged);
808 nfs41_update_target_slotid(slot->table, slot, res);
809 break;
810 case 1:
811
812
813
814
815
816 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
817 slot->seq_done = 1;
818 goto out;
819 case -NFS4ERR_DELAY:
820
821
822
823
824 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
825 __func__,
826 slot->slot_nr,
827 slot->seq_nr);
828 nfs4_slot_sequence_acked(slot, slot->seq_nr);
829 goto out_retry;
830 case -NFS4ERR_RETRY_UNCACHED_REP:
831 case -NFS4ERR_SEQ_FALSE_RETRY:
832
833
834
835
836 nfs4_slot_sequence_acked(slot, slot->seq_nr);
837 goto retry_new_seq;
838 case -NFS4ERR_BADSLOT:
839
840
841
842
843 if (slot->slot_nr < slot->table->target_highest_slotid)
844 goto session_recover;
845 goto retry_nowait;
846 case -NFS4ERR_SEQ_MISORDERED:
847 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
848
849
850
851
852
853 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
854 slot->seq_nr--;
855 goto retry_nowait;
856 }
857
858
859
860
861
862
863
864
865
866
867 slot->seq_nr = slot->seq_nr_highest_sent;
868 goto out_retry;
869 default:
870
871 slot->seq_done = 1;
872 }
873out:
874
875 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
876out_noaction:
877 return ret;
878session_recover:
879 nfs4_schedule_session_recovery(session, res->sr_status);
880 goto retry_nowait;
881retry_new_seq:
882 ++slot->seq_nr;
883retry_nowait:
884 if (rpc_restart_call_prepare(task)) {
885 nfs41_sequence_free_slot(res);
886 task->tk_status = 0;
887 ret = 0;
888 }
889 goto out;
890out_retry:
891 if (!rpc_restart_call(task))
892 goto out;
893 rpc_delay(task, NFS4_POLL_RETRY_MAX);
894 return 0;
895}
896
897int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
898{
899 if (!nfs41_sequence_process(task, res))
900 return 0;
901 if (res->sr_slot != NULL)
902 nfs41_sequence_free_slot(res);
903 return 1;
904
905}
906EXPORT_SYMBOL_GPL(nfs41_sequence_done);
907
908static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
909{
910 if (res->sr_slot == NULL)
911 return 1;
912 if (res->sr_slot->table->session != NULL)
913 return nfs41_sequence_process(task, res);
914 return nfs40_sequence_done(task, res);
915}
916
917static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
918{
919 if (res->sr_slot != NULL) {
920 if (res->sr_slot->table->session != NULL)
921 nfs41_sequence_free_slot(res);
922 else
923 nfs40_sequence_free_slot(res);
924 }
925}
926
927int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
928{
929 if (res->sr_slot == NULL)
930 return 1;
931 if (!res->sr_slot->table->session)
932 return nfs40_sequence_done(task, res);
933 return nfs41_sequence_done(task, res);
934}
935EXPORT_SYMBOL_GPL(nfs4_sequence_done);
936
937static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
938{
939 struct nfs4_call_sync_data *data = calldata;
940
941 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
942
943 nfs4_setup_sequence(data->seq_server->nfs_client,
944 data->seq_args, data->seq_res, task);
945}
946
947static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_call_sync_data *data = calldata;
950
951 nfs41_sequence_done(task, data->seq_res);
952}
953
954static const struct rpc_call_ops nfs41_call_sync_ops = {
955 .rpc_call_prepare = nfs41_call_sync_prepare,
956 .rpc_call_done = nfs41_call_sync_done,
957};
958
959#else
960
961static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
962{
963 return nfs40_sequence_done(task, res);
964}
965
966static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
967{
968 if (res->sr_slot != NULL)
969 nfs40_sequence_free_slot(res);
970}
971
972int nfs4_sequence_done(struct rpc_task *task,
973 struct nfs4_sequence_res *res)
974{
975 return nfs40_sequence_done(task, res);
976}
977EXPORT_SYMBOL_GPL(nfs4_sequence_done);
978
979#endif
980
981static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
982{
983 res->sr_timestamp = jiffies;
984 res->sr_status_flags = 0;
985 res->sr_status = 1;
986}
987
988static
989void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
990 struct nfs4_sequence_res *res,
991 struct nfs4_slot *slot)
992{
993 if (!slot)
994 return;
995 slot->privileged = args->sa_privileged ? 1 : 0;
996 args->sa_slot = slot;
997
998 res->sr_slot = slot;
999}
1000
1001int nfs4_setup_sequence(struct nfs_client *client,
1002 struct nfs4_sequence_args *args,
1003 struct nfs4_sequence_res *res,
1004 struct rpc_task *task)
1005{
1006 struct nfs4_session *session = nfs4_get_session(client);
1007 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
1008 struct nfs4_slot *slot;
1009
1010
1011 if (res->sr_slot != NULL)
1012 goto out_start;
1013
1014 if (session)
1015 tbl = &session->fc_slot_table;
1016
1017 spin_lock(&tbl->slot_tbl_lock);
1018
1019 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1020 goto out_sleep;
1021
1022 slot = nfs4_alloc_slot(tbl);
1023 if (IS_ERR(slot)) {
1024 if (slot == ERR_PTR(-ENOMEM))
1025 goto out_sleep_timeout;
1026 goto out_sleep;
1027 }
1028 spin_unlock(&tbl->slot_tbl_lock);
1029
1030 nfs4_sequence_attach_slot(args, res, slot);
1031
1032 trace_nfs4_setup_sequence(session, args);
1033out_start:
1034 nfs41_sequence_res_init(res);
1035 rpc_call_start(task);
1036 return 0;
1037out_sleep_timeout:
1038
1039 if (args->sa_privileged)
1040 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1041 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1042 else
1043 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1044 NULL, jiffies + (HZ >> 2));
1045 spin_unlock(&tbl->slot_tbl_lock);
1046 return -EAGAIN;
1047out_sleep:
1048 if (args->sa_privileged)
1049 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
1050 RPC_PRIORITY_PRIVILEGED);
1051 else
1052 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1053 spin_unlock(&tbl->slot_tbl_lock);
1054 return -EAGAIN;
1055}
1056EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1057
1058static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1059{
1060 struct nfs4_call_sync_data *data = calldata;
1061 nfs4_setup_sequence(data->seq_server->nfs_client,
1062 data->seq_args, data->seq_res, task);
1063}
1064
1065static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1066{
1067 struct nfs4_call_sync_data *data = calldata;
1068 nfs4_sequence_done(task, data->seq_res);
1069}
1070
1071static const struct rpc_call_ops nfs40_call_sync_ops = {
1072 .rpc_call_prepare = nfs40_call_sync_prepare,
1073 .rpc_call_done = nfs40_call_sync_done,
1074};
1075
1076static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1077 struct nfs_server *server,
1078 struct rpc_message *msg,
1079 struct nfs4_sequence_args *args,
1080 struct nfs4_sequence_res *res)
1081{
1082 int ret;
1083 struct rpc_task *task;
1084 struct nfs_client *clp = server->nfs_client;
1085 struct nfs4_call_sync_data data = {
1086 .seq_server = server,
1087 .seq_args = args,
1088 .seq_res = res,
1089 };
1090 struct rpc_task_setup task_setup = {
1091 .rpc_client = clnt,
1092 .rpc_message = msg,
1093 .callback_ops = clp->cl_mvops->call_sync_ops,
1094 .callback_data = &data
1095 };
1096
1097 task = rpc_run_task(&task_setup);
1098 if (IS_ERR(task))
1099 ret = PTR_ERR(task);
1100 else {
1101 ret = task->tk_status;
1102 rpc_put_task(task);
1103 }
1104 return ret;
1105}
1106
1107int nfs4_call_sync(struct rpc_clnt *clnt,
1108 struct nfs_server *server,
1109 struct rpc_message *msg,
1110 struct nfs4_sequence_args *args,
1111 struct nfs4_sequence_res *res,
1112 int cache_reply)
1113{
1114 nfs4_init_sequence(args, res, cache_reply, 0);
1115 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1116}
1117
1118static void
1119nfs4_inc_nlink_locked(struct inode *inode)
1120{
1121 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1122 inc_nlink(inode);
1123}
1124
1125static void
1126nfs4_dec_nlink_locked(struct inode *inode)
1127{
1128 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1129 drop_nlink(inode);
1130}
1131
1132static void
1133update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo,
1134 unsigned long timestamp, unsigned long cache_validity)
1135{
1136 struct nfs_inode *nfsi = NFS_I(dir);
1137
1138 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1139 | NFS_INO_INVALID_MTIME
1140 | NFS_INO_INVALID_DATA
1141 | cache_validity;
1142 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
1143 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1144 nfsi->attrtimeo_timestamp = jiffies;
1145 } else {
1146 nfs_force_lookup_revalidate(dir);
1147 if (cinfo->before != inode_peek_iversion_raw(dir))
1148 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1149 NFS_INO_INVALID_ACL;
1150 }
1151 inode_set_iversion_raw(dir, cinfo->after);
1152 nfsi->read_cache_jiffies = timestamp;
1153 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1154 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1155 nfs_fscache_invalidate(dir);
1156}
1157
1158static void
1159update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1160 unsigned long timestamp, unsigned long cache_validity)
1161{
1162 spin_lock(&dir->i_lock);
1163 update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
1164 spin_unlock(&dir->i_lock);
1165}
1166
1167struct nfs4_open_createattrs {
1168 struct nfs4_label *label;
1169 struct iattr *sattr;
1170 const __u32 verf[2];
1171};
1172
1173static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1174 int err, struct nfs4_exception *exception)
1175{
1176 if (err != -EINVAL)
1177 return false;
1178 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1179 return false;
1180 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1181 exception->retry = 1;
1182 return true;
1183}
1184
1185static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1186{
1187 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1188}
1189
1190static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1191{
1192 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1193
1194 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1195}
1196
1197static u32
1198nfs4_map_atomic_open_share(struct nfs_server *server,
1199 fmode_t fmode, int openflags)
1200{
1201 u32 res = 0;
1202
1203 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1204 case FMODE_READ:
1205 res = NFS4_SHARE_ACCESS_READ;
1206 break;
1207 case FMODE_WRITE:
1208 res = NFS4_SHARE_ACCESS_WRITE;
1209 break;
1210 case FMODE_READ|FMODE_WRITE:
1211 res = NFS4_SHARE_ACCESS_BOTH;
1212 }
1213 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1214 goto out;
1215
1216 if (openflags & O_DIRECT)
1217 res |= NFS4_SHARE_WANT_NO_DELEG;
1218out:
1219 return res;
1220}
1221
1222static enum open_claim_type4
1223nfs4_map_atomic_open_claim(struct nfs_server *server,
1224 enum open_claim_type4 claim)
1225{
1226 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1227 return claim;
1228 switch (claim) {
1229 default:
1230 return claim;
1231 case NFS4_OPEN_CLAIM_FH:
1232 return NFS4_OPEN_CLAIM_NULL;
1233 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1234 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1235 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1236 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1237 }
1238}
1239
1240static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1241{
1242 p->o_res.f_attr = &p->f_attr;
1243 p->o_res.f_label = p->f_label;
1244 p->o_res.seqid = p->o_arg.seqid;
1245 p->c_res.seqid = p->c_arg.seqid;
1246 p->o_res.server = p->o_arg.server;
1247 p->o_res.access_request = p->o_arg.access;
1248 nfs_fattr_init(&p->f_attr);
1249 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1250}
1251
1252static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1253 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1254 const struct nfs4_open_createattrs *c,
1255 enum open_claim_type4 claim,
1256 gfp_t gfp_mask)
1257{
1258 struct dentry *parent = dget_parent(dentry);
1259 struct inode *dir = d_inode(parent);
1260 struct nfs_server *server = NFS_SERVER(dir);
1261 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1262 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1263 struct nfs4_opendata *p;
1264
1265 p = kzalloc(sizeof(*p), gfp_mask);
1266 if (p == NULL)
1267 goto err;
1268
1269 p->f_label = nfs4_label_alloc(server, gfp_mask);
1270 if (IS_ERR(p->f_label))
1271 goto err_free_p;
1272
1273 p->a_label = nfs4_label_alloc(server, gfp_mask);
1274 if (IS_ERR(p->a_label))
1275 goto err_free_f;
1276
1277 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1278 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1279 if (IS_ERR(p->o_arg.seqid))
1280 goto err_free_label;
1281 nfs_sb_active(dentry->d_sb);
1282 p->dentry = dget(dentry);
1283 p->dir = parent;
1284 p->owner = sp;
1285 atomic_inc(&sp->so_count);
1286 p->o_arg.open_flags = flags;
1287 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1288 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1289 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1290 fmode, flags);
1291 if (flags & O_CREAT) {
1292 p->o_arg.umask = current_umask();
1293 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1294 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1295 p->o_arg.u.attrs = &p->attrs;
1296 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1297
1298 memcpy(p->o_arg.u.verifier.data, c->verf,
1299 sizeof(p->o_arg.u.verifier.data));
1300 }
1301 }
1302
1303
1304 if (!(flags & O_EXCL)) {
1305
1306
1307 switch (p->o_arg.claim) {
1308 default:
1309 break;
1310 case NFS4_OPEN_CLAIM_NULL:
1311 case NFS4_OPEN_CLAIM_FH:
1312 p->o_arg.access = NFS4_ACCESS_READ |
1313 NFS4_ACCESS_MODIFY |
1314 NFS4_ACCESS_EXTEND |
1315 NFS4_ACCESS_EXECUTE;
1316 }
1317 }
1318 p->o_arg.clientid = server->nfs_client->cl_clientid;
1319 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1320 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1321 p->o_arg.name = &dentry->d_name;
1322 p->o_arg.server = server;
1323 p->o_arg.bitmask = nfs4_bitmask(server, label);
1324 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1325 switch (p->o_arg.claim) {
1326 case NFS4_OPEN_CLAIM_NULL:
1327 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1328 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1329 p->o_arg.fh = NFS_FH(dir);
1330 break;
1331 case NFS4_OPEN_CLAIM_PREVIOUS:
1332 case NFS4_OPEN_CLAIM_FH:
1333 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1334 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1335 p->o_arg.fh = NFS_FH(d_inode(dentry));
1336 }
1337 p->c_arg.fh = &p->o_res.fh;
1338 p->c_arg.stateid = &p->o_res.stateid;
1339 p->c_arg.seqid = p->o_arg.seqid;
1340 nfs4_init_opendata_res(p);
1341 kref_init(&p->kref);
1342 return p;
1343
1344err_free_label:
1345 nfs4_label_free(p->a_label);
1346err_free_f:
1347 nfs4_label_free(p->f_label);
1348err_free_p:
1349 kfree(p);
1350err:
1351 dput(parent);
1352 return NULL;
1353}
1354
1355static void nfs4_opendata_free(struct kref *kref)
1356{
1357 struct nfs4_opendata *p = container_of(kref,
1358 struct nfs4_opendata, kref);
1359 struct super_block *sb = p->dentry->d_sb;
1360
1361 nfs4_lgopen_release(p->lgp);
1362 nfs_free_seqid(p->o_arg.seqid);
1363 nfs4_sequence_free_slot(&p->o_res.seq_res);
1364 if (p->state != NULL)
1365 nfs4_put_open_state(p->state);
1366 nfs4_put_state_owner(p->owner);
1367
1368 nfs4_label_free(p->a_label);
1369 nfs4_label_free(p->f_label);
1370
1371 dput(p->dir);
1372 dput(p->dentry);
1373 nfs_sb_deactive(sb);
1374 nfs_fattr_free_names(&p->f_attr);
1375 kfree(p->f_attr.mdsthreshold);
1376 kfree(p);
1377}
1378
1379static void nfs4_opendata_put(struct nfs4_opendata *p)
1380{
1381 if (p != NULL)
1382 kref_put(&p->kref, nfs4_opendata_free);
1383}
1384
1385static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1386 fmode_t fmode)
1387{
1388 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1389 case FMODE_READ|FMODE_WRITE:
1390 return state->n_rdwr != 0;
1391 case FMODE_WRITE:
1392 return state->n_wronly != 0;
1393 case FMODE_READ:
1394 return state->n_rdonly != 0;
1395 }
1396 WARN_ON_ONCE(1);
1397 return false;
1398}
1399
1400static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1401 int open_mode, enum open_claim_type4 claim)
1402{
1403 int ret = 0;
1404
1405 if (open_mode & (O_EXCL|O_TRUNC))
1406 goto out;
1407 switch (claim) {
1408 case NFS4_OPEN_CLAIM_NULL:
1409 case NFS4_OPEN_CLAIM_FH:
1410 goto out;
1411 default:
1412 break;
1413 }
1414 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1415 case FMODE_READ:
1416 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1417 && state->n_rdonly != 0;
1418 break;
1419 case FMODE_WRITE:
1420 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1421 && state->n_wronly != 0;
1422 break;
1423 case FMODE_READ|FMODE_WRITE:
1424 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1425 && state->n_rdwr != 0;
1426 }
1427out:
1428 return ret;
1429}
1430
1431static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1432 enum open_claim_type4 claim)
1433{
1434 if (delegation == NULL)
1435 return 0;
1436 if ((delegation->type & fmode) != fmode)
1437 return 0;
1438 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1439 return 0;
1440 switch (claim) {
1441 case NFS4_OPEN_CLAIM_NULL:
1442 case NFS4_OPEN_CLAIM_FH:
1443 break;
1444 case NFS4_OPEN_CLAIM_PREVIOUS:
1445 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1446 break;
1447
1448 default:
1449 return 0;
1450 }
1451 nfs_mark_delegation_referenced(delegation);
1452 return 1;
1453}
1454
1455static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1456{
1457 switch (fmode) {
1458 case FMODE_WRITE:
1459 state->n_wronly++;
1460 break;
1461 case FMODE_READ:
1462 state->n_rdonly++;
1463 break;
1464 case FMODE_READ|FMODE_WRITE:
1465 state->n_rdwr++;
1466 }
1467 nfs4_state_set_mode_locked(state, state->state | fmode);
1468}
1469
1470#ifdef CONFIG_NFS_V4_1
1471static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1472{
1473 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1474 return true;
1475 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1476 return true;
1477 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1478 return true;
1479 return false;
1480}
1481#endif
1482
1483static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1484{
1485 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1486 wake_up_all(&state->waitq);
1487}
1488
1489static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1490 const nfs4_stateid *stateid)
1491{
1492 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1493 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1494
1495 if (stateid_seqid == state_seqid + 1U ||
1496 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1497 nfs_state_log_update_open_stateid(state);
1498 else
1499 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1500}
1501
1502static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1503{
1504 struct nfs_client *clp = state->owner->so_server->nfs_client;
1505 bool need_recover = false;
1506
1507 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1508 need_recover = true;
1509 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1510 need_recover = true;
1511 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1512 need_recover = true;
1513 if (need_recover)
1514 nfs4_state_mark_reclaim_nograce(clp, state);
1515}
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1528 const nfs4_stateid *stateid)
1529{
1530 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1531 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1532 if (stateid->seqid == cpu_to_be32(1))
1533 nfs_state_log_update_open_stateid(state);
1534 else
1535 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1536 return true;
1537 }
1538
1539 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1540 nfs_state_log_out_of_order_open_stateid(state, stateid);
1541 return true;
1542 }
1543 return false;
1544}
1545
1546static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1547{
1548 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1549 return;
1550 if (state->n_wronly)
1551 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1552 if (state->n_rdonly)
1553 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1554 if (state->n_rdwr)
1555 set_bit(NFS_O_RDWR_STATE, &state->flags);
1556 set_bit(NFS_OPEN_STATE, &state->flags);
1557}
1558
1559static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1560 nfs4_stateid *stateid, fmode_t fmode)
1561{
1562 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1563 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1564 case FMODE_WRITE:
1565 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1566 break;
1567 case FMODE_READ:
1568 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1569 break;
1570 case 0:
1571 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1572 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1573 clear_bit(NFS_OPEN_STATE, &state->flags);
1574 }
1575 if (stateid == NULL)
1576 return;
1577
1578 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1579 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1580 nfs_resync_open_stateid_locked(state);
1581 goto out;
1582 }
1583 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1584 nfs4_stateid_copy(&state->stateid, stateid);
1585 nfs4_stateid_copy(&state->open_stateid, stateid);
1586 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1587out:
1588 nfs_state_log_update_open_stateid(state);
1589}
1590
1591static void nfs_clear_open_stateid(struct nfs4_state *state,
1592 nfs4_stateid *arg_stateid,
1593 nfs4_stateid *stateid, fmode_t fmode)
1594{
1595 write_seqlock(&state->seqlock);
1596
1597 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1598 nfs_clear_open_stateid_locked(state, stateid, fmode);
1599 write_sequnlock(&state->seqlock);
1600 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1601 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1602}
1603
1604static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1605 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1606 __must_hold(&state->owner->so_lock)
1607 __must_hold(&state->seqlock)
1608 __must_hold(RCU)
1609
1610{
1611 DEFINE_WAIT(wait);
1612 int status = 0;
1613 for (;;) {
1614
1615 if (!nfs_need_update_open_stateid(state, stateid))
1616 return;
1617 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1618 break;
1619 if (status)
1620 break;
1621
1622 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1623 break;
1624
1625 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1626
1627
1628
1629
1630
1631 write_sequnlock(&state->seqlock);
1632 spin_unlock(&state->owner->so_lock);
1633 rcu_read_unlock();
1634 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1635 if (!signal_pending(current)) {
1636 if (schedule_timeout(5*HZ) == 0)
1637 status = -EAGAIN;
1638 else
1639 status = 0;
1640 } else
1641 status = -EINTR;
1642 finish_wait(&state->waitq, &wait);
1643 rcu_read_lock();
1644 spin_lock(&state->owner->so_lock);
1645 write_seqlock(&state->seqlock);
1646 }
1647
1648 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1649 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1650 nfs4_stateid_copy(freeme, &state->open_stateid);
1651 nfs_test_and_clear_all_open_stateid(state);
1652 }
1653
1654 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1655 nfs4_stateid_copy(&state->stateid, stateid);
1656 nfs4_stateid_copy(&state->open_stateid, stateid);
1657 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1658 nfs_state_log_update_open_stateid(state);
1659}
1660
1661static void nfs_state_set_open_stateid(struct nfs4_state *state,
1662 const nfs4_stateid *open_stateid,
1663 fmode_t fmode,
1664 nfs4_stateid *freeme)
1665{
1666
1667
1668
1669
1670 write_seqlock(&state->seqlock);
1671 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1672 switch (fmode) {
1673 case FMODE_READ:
1674 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1675 break;
1676 case FMODE_WRITE:
1677 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1678 break;
1679 case FMODE_READ|FMODE_WRITE:
1680 set_bit(NFS_O_RDWR_STATE, &state->flags);
1681 }
1682 set_bit(NFS_OPEN_STATE, &state->flags);
1683 write_sequnlock(&state->seqlock);
1684}
1685
1686static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1687{
1688 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1689 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1690 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1691 clear_bit(NFS_OPEN_STATE, &state->flags);
1692}
1693
1694static void nfs_state_set_delegation(struct nfs4_state *state,
1695 const nfs4_stateid *deleg_stateid,
1696 fmode_t fmode)
1697{
1698
1699
1700
1701
1702 write_seqlock(&state->seqlock);
1703 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1704 set_bit(NFS_DELEGATED_STATE, &state->flags);
1705 write_sequnlock(&state->seqlock);
1706}
1707
1708static void nfs_state_clear_delegation(struct nfs4_state *state)
1709{
1710 write_seqlock(&state->seqlock);
1711 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1712 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1713 write_sequnlock(&state->seqlock);
1714}
1715
1716static int update_open_stateid(struct nfs4_state *state,
1717 const nfs4_stateid *open_stateid,
1718 const nfs4_stateid *delegation,
1719 fmode_t fmode)
1720{
1721 struct nfs_server *server = NFS_SERVER(state->inode);
1722 struct nfs_client *clp = server->nfs_client;
1723 struct nfs_inode *nfsi = NFS_I(state->inode);
1724 struct nfs_delegation *deleg_cur;
1725 nfs4_stateid freeme = { };
1726 int ret = 0;
1727
1728 fmode &= (FMODE_READ|FMODE_WRITE);
1729
1730 rcu_read_lock();
1731 spin_lock(&state->owner->so_lock);
1732 if (open_stateid != NULL) {
1733 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1734 ret = 1;
1735 }
1736
1737 deleg_cur = rcu_dereference(nfsi->delegation);
1738 if (deleg_cur == NULL)
1739 goto no_delegation;
1740
1741 spin_lock(&deleg_cur->lock);
1742 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1743 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1744 (deleg_cur->type & fmode) != fmode)
1745 goto no_delegation_unlock;
1746
1747 if (delegation == NULL)
1748 delegation = &deleg_cur->stateid;
1749 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1750 goto no_delegation_unlock;
1751
1752 nfs_mark_delegation_referenced(deleg_cur);
1753 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1754 ret = 1;
1755no_delegation_unlock:
1756 spin_unlock(&deleg_cur->lock);
1757no_delegation:
1758 if (ret)
1759 update_open_stateflags(state, fmode);
1760 spin_unlock(&state->owner->so_lock);
1761 rcu_read_unlock();
1762
1763 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1764 nfs4_schedule_state_manager(clp);
1765 if (freeme.type != 0)
1766 nfs4_test_and_free_stateid(server, &freeme,
1767 state->owner->so_cred);
1768
1769 return ret;
1770}
1771
1772static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1773 const nfs4_stateid *stateid)
1774{
1775 struct nfs4_state *state = lsp->ls_state;
1776 bool ret = false;
1777
1778 spin_lock(&state->state_lock);
1779 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1780 goto out_noupdate;
1781 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1782 goto out_noupdate;
1783 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1784 ret = true;
1785out_noupdate:
1786 spin_unlock(&state->state_lock);
1787 return ret;
1788}
1789
1790static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1791{
1792 struct nfs_delegation *delegation;
1793
1794 fmode &= FMODE_READ|FMODE_WRITE;
1795 rcu_read_lock();
1796 delegation = rcu_dereference(NFS_I(inode)->delegation);
1797 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1798 rcu_read_unlock();
1799 return;
1800 }
1801 rcu_read_unlock();
1802 nfs4_inode_return_delegation(inode);
1803}
1804
1805static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1806{
1807 struct nfs4_state *state = opendata->state;
1808 struct nfs_inode *nfsi = NFS_I(state->inode);
1809 struct nfs_delegation *delegation;
1810 int open_mode = opendata->o_arg.open_flags;
1811 fmode_t fmode = opendata->o_arg.fmode;
1812 enum open_claim_type4 claim = opendata->o_arg.claim;
1813 nfs4_stateid stateid;
1814 int ret = -EAGAIN;
1815
1816 for (;;) {
1817 spin_lock(&state->owner->so_lock);
1818 if (can_open_cached(state, fmode, open_mode, claim)) {
1819 update_open_stateflags(state, fmode);
1820 spin_unlock(&state->owner->so_lock);
1821 goto out_return_state;
1822 }
1823 spin_unlock(&state->owner->so_lock);
1824 rcu_read_lock();
1825 delegation = rcu_dereference(nfsi->delegation);
1826 if (!can_open_delegated(delegation, fmode, claim)) {
1827 rcu_read_unlock();
1828 break;
1829 }
1830
1831 nfs4_stateid_copy(&stateid, &delegation->stateid);
1832 rcu_read_unlock();
1833 nfs_release_seqid(opendata->o_arg.seqid);
1834 if (!opendata->is_recover) {
1835 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1836 if (ret != 0)
1837 goto out;
1838 }
1839 ret = -EAGAIN;
1840
1841
1842 if (update_open_stateid(state, NULL, &stateid, fmode))
1843 goto out_return_state;
1844 }
1845out:
1846 return ERR_PTR(ret);
1847out_return_state:
1848 refcount_inc(&state->count);
1849 return state;
1850}
1851
1852static void
1853nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1854{
1855 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1856 struct nfs_delegation *delegation;
1857 int delegation_flags = 0;
1858
1859 rcu_read_lock();
1860 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1861 if (delegation)
1862 delegation_flags = delegation->flags;
1863 rcu_read_unlock();
1864 switch (data->o_arg.claim) {
1865 default:
1866 break;
1867 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1868 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1869 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1870 "returning a delegation for "
1871 "OPEN(CLAIM_DELEGATE_CUR)\n",
1872 clp->cl_hostname);
1873 return;
1874 }
1875 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1876 nfs_inode_set_delegation(state->inode,
1877 data->owner->so_cred,
1878 data->o_res.delegation_type,
1879 &data->o_res.delegation,
1880 data->o_res.pagemod_limit);
1881 else
1882 nfs_inode_reclaim_delegation(state->inode,
1883 data->owner->so_cred,
1884 data->o_res.delegation_type,
1885 &data->o_res.delegation,
1886 data->o_res.pagemod_limit);
1887
1888 if (data->o_res.do_recall)
1889 nfs_async_inode_return_delegation(state->inode,
1890 &data->o_res.delegation);
1891}
1892
1893
1894
1895
1896
1897static struct nfs4_state *
1898_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1899{
1900 struct inode *inode = data->state->inode;
1901 struct nfs4_state *state = data->state;
1902 int ret;
1903
1904 if (!data->rpc_done) {
1905 if (data->rpc_status)
1906 return ERR_PTR(data->rpc_status);
1907
1908 goto update;
1909 }
1910
1911 ret = nfs_refresh_inode(inode, &data->f_attr);
1912 if (ret)
1913 return ERR_PTR(ret);
1914
1915 if (data->o_res.delegation_type != 0)
1916 nfs4_opendata_check_deleg(data, state);
1917update:
1918 if (!update_open_stateid(state, &data->o_res.stateid,
1919 NULL, data->o_arg.fmode))
1920 return ERR_PTR(-EAGAIN);
1921 refcount_inc(&state->count);
1922
1923 return state;
1924}
1925
1926static struct inode *
1927nfs4_opendata_get_inode(struct nfs4_opendata *data)
1928{
1929 struct inode *inode;
1930
1931 switch (data->o_arg.claim) {
1932 case NFS4_OPEN_CLAIM_NULL:
1933 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1934 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1935 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1936 return ERR_PTR(-EAGAIN);
1937 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1938 &data->f_attr, data->f_label);
1939 break;
1940 default:
1941 inode = d_inode(data->dentry);
1942 ihold(inode);
1943 nfs_refresh_inode(inode, &data->f_attr);
1944 }
1945 return inode;
1946}
1947
1948static struct nfs4_state *
1949nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
1950{
1951 struct nfs4_state *state;
1952 struct inode *inode;
1953
1954 inode = nfs4_opendata_get_inode(data);
1955 if (IS_ERR(inode))
1956 return ERR_CAST(inode);
1957 if (data->state != NULL && data->state->inode == inode) {
1958 state = data->state;
1959 refcount_inc(&state->count);
1960 } else
1961 state = nfs4_get_open_state(inode, data->owner);
1962 iput(inode);
1963 if (state == NULL)
1964 state = ERR_PTR(-ENOMEM);
1965 return state;
1966}
1967
1968static struct nfs4_state *
1969_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1970{
1971 struct nfs4_state *state;
1972
1973 if (!data->rpc_done) {
1974 state = nfs4_try_open_cached(data);
1975 trace_nfs4_cached_open(data->state);
1976 goto out;
1977 }
1978
1979 state = nfs4_opendata_find_nfs4_state(data);
1980 if (IS_ERR(state))
1981 goto out;
1982
1983 if (data->o_res.delegation_type != 0)
1984 nfs4_opendata_check_deleg(data, state);
1985 if (!update_open_stateid(state, &data->o_res.stateid,
1986 NULL, data->o_arg.fmode)) {
1987 nfs4_put_open_state(state);
1988 state = ERR_PTR(-EAGAIN);
1989 }
1990out:
1991 nfs_release_seqid(data->o_arg.seqid);
1992 return state;
1993}
1994
1995static struct nfs4_state *
1996nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1997{
1998 struct nfs4_state *ret;
1999
2000 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2001 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2002 else
2003 ret = _nfs4_opendata_to_nfs4_state(data);
2004 nfs4_sequence_free_slot(&data->o_res.seq_res);
2005 return ret;
2006}
2007
2008static struct nfs_open_context *
2009nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
2010{
2011 struct nfs_inode *nfsi = NFS_I(state->inode);
2012 struct nfs_open_context *ctx;
2013
2014 rcu_read_lock();
2015 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
2016 if (ctx->state != state)
2017 continue;
2018 if ((ctx->mode & mode) != mode)
2019 continue;
2020 if (!get_nfs_open_context(ctx))
2021 continue;
2022 rcu_read_unlock();
2023 return ctx;
2024 }
2025 rcu_read_unlock();
2026 return ERR_PTR(-ENOENT);
2027}
2028
2029static struct nfs_open_context *
2030nfs4_state_find_open_context(struct nfs4_state *state)
2031{
2032 struct nfs_open_context *ctx;
2033
2034 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2035 if (!IS_ERR(ctx))
2036 return ctx;
2037 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2038 if (!IS_ERR(ctx))
2039 return ctx;
2040 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2041}
2042
2043static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2044 struct nfs4_state *state, enum open_claim_type4 claim)
2045{
2046 struct nfs4_opendata *opendata;
2047
2048 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
2049 NULL, claim, GFP_NOFS);
2050 if (opendata == NULL)
2051 return ERR_PTR(-ENOMEM);
2052 opendata->state = state;
2053 refcount_inc(&state->count);
2054 return opendata;
2055}
2056
2057static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2058 fmode_t fmode)
2059{
2060 struct nfs4_state *newstate;
2061 int ret;
2062
2063 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
2064 return 0;
2065 opendata->o_arg.open_flags = 0;
2066 opendata->o_arg.fmode = fmode;
2067 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2068 NFS_SB(opendata->dentry->d_sb),
2069 fmode, 0);
2070 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2071 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2072 nfs4_init_opendata_res(opendata);
2073 ret = _nfs4_recover_proc_open(opendata);
2074 if (ret != 0)
2075 return ret;
2076 newstate = nfs4_opendata_to_nfs4_state(opendata);
2077 if (IS_ERR(newstate))
2078 return PTR_ERR(newstate);
2079 if (newstate != opendata->state)
2080 ret = -ESTALE;
2081 nfs4_close_state(newstate, fmode);
2082 return ret;
2083}
2084
2085static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2086{
2087 int ret;
2088
2089
2090 smp_rmb();
2091 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2092 if (ret != 0)
2093 return ret;
2094 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2095 if (ret != 0)
2096 return ret;
2097 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2098 if (ret != 0)
2099 return ret;
2100
2101
2102
2103
2104 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
2105 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
2106 write_seqlock(&state->seqlock);
2107 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2108 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2109 write_sequnlock(&state->seqlock);
2110 }
2111 return 0;
2112}
2113
2114
2115
2116
2117
2118static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2119{
2120 struct nfs_delegation *delegation;
2121 struct nfs4_opendata *opendata;
2122 fmode_t delegation_type = 0;
2123 int status;
2124
2125 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2126 NFS4_OPEN_CLAIM_PREVIOUS);
2127 if (IS_ERR(opendata))
2128 return PTR_ERR(opendata);
2129 rcu_read_lock();
2130 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2131 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
2132 delegation_type = delegation->type;
2133 rcu_read_unlock();
2134 opendata->o_arg.u.delegation_type = delegation_type;
2135 status = nfs4_open_recover(opendata, state);
2136 nfs4_opendata_put(opendata);
2137 return status;
2138}
2139
2140static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2141{
2142 struct nfs_server *server = NFS_SERVER(state->inode);
2143 struct nfs4_exception exception = { };
2144 int err;
2145 do {
2146 err = _nfs4_do_open_reclaim(ctx, state);
2147 trace_nfs4_open_reclaim(ctx, 0, err);
2148 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2149 continue;
2150 if (err != -NFS4ERR_DELAY)
2151 break;
2152 nfs4_handle_exception(server, err, &exception);
2153 } while (exception.retry);
2154 return err;
2155}
2156
2157static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2158{
2159 struct nfs_open_context *ctx;
2160 int ret;
2161
2162 ctx = nfs4_state_find_open_context(state);
2163 if (IS_ERR(ctx))
2164 return -EAGAIN;
2165 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2166 nfs_state_clear_open_state_flags(state);
2167 ret = nfs4_do_open_reclaim(ctx, state);
2168 put_nfs_open_context(ctx);
2169 return ret;
2170}
2171
2172static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
2173{
2174 switch (err) {
2175 default:
2176 printk(KERN_ERR "NFS: %s: unhandled error "
2177 "%d.\n", __func__, err);
2178 case 0:
2179 case -ENOENT:
2180 case -EAGAIN:
2181 case -ESTALE:
2182 case -ETIMEDOUT:
2183 break;
2184 case -NFS4ERR_BADSESSION:
2185 case -NFS4ERR_BADSLOT:
2186 case -NFS4ERR_BAD_HIGH_SLOT:
2187 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2188 case -NFS4ERR_DEADSESSION:
2189 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
2190 return -EAGAIN;
2191 case -NFS4ERR_STALE_CLIENTID:
2192 case -NFS4ERR_STALE_STATEID:
2193
2194 nfs4_schedule_lease_recovery(server->nfs_client);
2195 return -EAGAIN;
2196 case -NFS4ERR_MOVED:
2197 nfs4_schedule_migration_recovery(server);
2198 return -EAGAIN;
2199 case -NFS4ERR_LEASE_MOVED:
2200 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2201 return -EAGAIN;
2202 case -NFS4ERR_DELEG_REVOKED:
2203 case -NFS4ERR_ADMIN_REVOKED:
2204 case -NFS4ERR_EXPIRED:
2205 case -NFS4ERR_BAD_STATEID:
2206 case -NFS4ERR_OPENMODE:
2207 nfs_inode_find_state_and_recover(state->inode,
2208 stateid);
2209 nfs4_schedule_stateid_recovery(server, state);
2210 return -EAGAIN;
2211 case -NFS4ERR_DELAY:
2212 case -NFS4ERR_GRACE:
2213 ssleep(1);
2214 return -EAGAIN;
2215 case -ENOMEM:
2216 case -NFS4ERR_DENIED:
2217 if (fl) {
2218 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2219 if (lsp)
2220 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2221 }
2222 return 0;
2223 }
2224 return err;
2225}
2226
2227int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2228 struct nfs4_state *state, const nfs4_stateid *stateid)
2229{
2230 struct nfs_server *server = NFS_SERVER(state->inode);
2231 struct nfs4_opendata *opendata;
2232 int err = 0;
2233
2234 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2235 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2236 if (IS_ERR(opendata))
2237 return PTR_ERR(opendata);
2238 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2239 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
2240 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2241 if (err)
2242 goto out;
2243 }
2244 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
2245 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2246 if (err)
2247 goto out;
2248 }
2249 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
2250 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2251 if (err)
2252 goto out;
2253 }
2254 nfs_state_clear_delegation(state);
2255out:
2256 nfs4_opendata_put(opendata);
2257 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2258}
2259
2260static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2261{
2262 struct nfs4_opendata *data = calldata;
2263
2264 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2265 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2266}
2267
2268static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2269{
2270 struct nfs4_opendata *data = calldata;
2271
2272 nfs40_sequence_done(task, &data->c_res.seq_res);
2273
2274 data->rpc_status = task->tk_status;
2275 if (data->rpc_status == 0) {
2276 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2277 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2278 renew_lease(data->o_res.server, data->timestamp);
2279 data->rpc_done = true;
2280 }
2281}
2282
2283static void nfs4_open_confirm_release(void *calldata)
2284{
2285 struct nfs4_opendata *data = calldata;
2286 struct nfs4_state *state = NULL;
2287
2288
2289 if (!data->cancelled)
2290 goto out_free;
2291
2292 if (!data->rpc_done)
2293 goto out_free;
2294 state = nfs4_opendata_to_nfs4_state(data);
2295 if (!IS_ERR(state))
2296 nfs4_close_state(state, data->o_arg.fmode);
2297out_free:
2298 nfs4_opendata_put(data);
2299}
2300
2301static const struct rpc_call_ops nfs4_open_confirm_ops = {
2302 .rpc_call_prepare = nfs4_open_confirm_prepare,
2303 .rpc_call_done = nfs4_open_confirm_done,
2304 .rpc_release = nfs4_open_confirm_release,
2305};
2306
2307
2308
2309
2310static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2311{
2312 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2313 struct rpc_task *task;
2314 struct rpc_message msg = {
2315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2316 .rpc_argp = &data->c_arg,
2317 .rpc_resp = &data->c_res,
2318 .rpc_cred = data->owner->so_cred,
2319 };
2320 struct rpc_task_setup task_setup_data = {
2321 .rpc_client = server->client,
2322 .rpc_message = &msg,
2323 .callback_ops = &nfs4_open_confirm_ops,
2324 .callback_data = data,
2325 .workqueue = nfsiod_workqueue,
2326 .flags = RPC_TASK_ASYNC,
2327 };
2328 int status;
2329
2330 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2331 data->is_recover);
2332 kref_get(&data->kref);
2333 data->rpc_done = false;
2334 data->rpc_status = 0;
2335 data->timestamp = jiffies;
2336 task = rpc_run_task(&task_setup_data);
2337 if (IS_ERR(task))
2338 return PTR_ERR(task);
2339 status = rpc_wait_for_completion_task(task);
2340 if (status != 0) {
2341 data->cancelled = true;
2342 smp_wmb();
2343 } else
2344 status = data->rpc_status;
2345 rpc_put_task(task);
2346 return status;
2347}
2348
2349static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2350{
2351 struct nfs4_opendata *data = calldata;
2352 struct nfs4_state_owner *sp = data->owner;
2353 struct nfs_client *clp = sp->so_server->nfs_client;
2354 enum open_claim_type4 claim = data->o_arg.claim;
2355
2356 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2357 goto out_wait;
2358
2359
2360
2361
2362 if (data->state != NULL) {
2363 struct nfs_delegation *delegation;
2364
2365 if (can_open_cached(data->state, data->o_arg.fmode,
2366 data->o_arg.open_flags, claim))
2367 goto out_no_action;
2368 rcu_read_lock();
2369 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2370 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2371 goto unlock_no_action;
2372 rcu_read_unlock();
2373 }
2374
2375 data->o_arg.clientid = clp->cl_clientid;
2376 switch (claim) {
2377 default:
2378 break;
2379 case NFS4_OPEN_CLAIM_PREVIOUS:
2380 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2381 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2382 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2383
2384 case NFS4_OPEN_CLAIM_FH:
2385 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2386 }
2387 data->timestamp = jiffies;
2388 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2389 &data->o_arg.seq_args,
2390 &data->o_res.seq_res,
2391 task) != 0)
2392 nfs_release_seqid(data->o_arg.seqid);
2393
2394
2395 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2396 if (data->o_arg.open_flags & O_EXCL) {
2397 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2398 if (nfs4_has_persistent_session(clp))
2399 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2400 else if (clp->cl_mvops->minor_version > 0)
2401 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2402 }
2403 return;
2404unlock_no_action:
2405 trace_nfs4_cached_open(data->state);
2406 rcu_read_unlock();
2407out_no_action:
2408 task->tk_action = NULL;
2409out_wait:
2410 nfs4_sequence_done(task, &data->o_res.seq_res);
2411}
2412
2413static void nfs4_open_done(struct rpc_task *task, void *calldata)
2414{
2415 struct nfs4_opendata *data = calldata;
2416
2417 data->rpc_status = task->tk_status;
2418
2419 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2420 return;
2421
2422 if (task->tk_status == 0) {
2423 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2424 switch (data->o_res.f_attr->mode & S_IFMT) {
2425 case S_IFREG:
2426 break;
2427 case S_IFLNK:
2428 data->rpc_status = -ELOOP;
2429 break;
2430 case S_IFDIR:
2431 data->rpc_status = -EISDIR;
2432 break;
2433 default:
2434 data->rpc_status = -ENOTDIR;
2435 }
2436 }
2437 renew_lease(data->o_res.server, data->timestamp);
2438 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2439 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2440 }
2441 data->rpc_done = true;
2442}
2443
2444static void nfs4_open_release(void *calldata)
2445{
2446 struct nfs4_opendata *data = calldata;
2447 struct nfs4_state *state = NULL;
2448
2449
2450 if (!data->cancelled)
2451 goto out_free;
2452
2453 if (data->rpc_status != 0 || !data->rpc_done)
2454 goto out_free;
2455
2456 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2457 goto out_free;
2458 state = nfs4_opendata_to_nfs4_state(data);
2459 if (!IS_ERR(state))
2460 nfs4_close_state(state, data->o_arg.fmode);
2461out_free:
2462 nfs4_opendata_put(data);
2463}
2464
2465static const struct rpc_call_ops nfs4_open_ops = {
2466 .rpc_call_prepare = nfs4_open_prepare,
2467 .rpc_call_done = nfs4_open_done,
2468 .rpc_release = nfs4_open_release,
2469};
2470
2471static int nfs4_run_open_task(struct nfs4_opendata *data,
2472 struct nfs_open_context *ctx)
2473{
2474 struct inode *dir = d_inode(data->dir);
2475 struct nfs_server *server = NFS_SERVER(dir);
2476 struct nfs_openargs *o_arg = &data->o_arg;
2477 struct nfs_openres *o_res = &data->o_res;
2478 struct rpc_task *task;
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2481 .rpc_argp = o_arg,
2482 .rpc_resp = o_res,
2483 .rpc_cred = data->owner->so_cred,
2484 };
2485 struct rpc_task_setup task_setup_data = {
2486 .rpc_client = server->client,
2487 .rpc_message = &msg,
2488 .callback_ops = &nfs4_open_ops,
2489 .callback_data = data,
2490 .workqueue = nfsiod_workqueue,
2491 .flags = RPC_TASK_ASYNC,
2492 };
2493 int status;
2494
2495 kref_get(&data->kref);
2496 data->rpc_done = false;
2497 data->rpc_status = 0;
2498 data->cancelled = false;
2499 data->is_recover = false;
2500 if (!ctx) {
2501 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
2502 data->is_recover = true;
2503 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2504 } else {
2505 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2506 pnfs_lgopen_prepare(data, ctx);
2507 }
2508 task = rpc_run_task(&task_setup_data);
2509 if (IS_ERR(task))
2510 return PTR_ERR(task);
2511 status = rpc_wait_for_completion_task(task);
2512 if (status != 0) {
2513 data->cancelled = true;
2514 smp_wmb();
2515 } else
2516 status = data->rpc_status;
2517 rpc_put_task(task);
2518
2519 return status;
2520}
2521
2522static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2523{
2524 struct inode *dir = d_inode(data->dir);
2525 struct nfs_openres *o_res = &data->o_res;
2526 int status;
2527
2528 status = nfs4_run_open_task(data, NULL);
2529 if (status != 0 || !data->rpc_done)
2530 return status;
2531
2532 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2533
2534 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2535 status = _nfs4_proc_open_confirm(data);
2536
2537 return status;
2538}
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548static int nfs4_opendata_access(const struct cred *cred,
2549 struct nfs4_opendata *opendata,
2550 struct nfs4_state *state, fmode_t fmode,
2551 int openflags)
2552{
2553 struct nfs_access_entry cache;
2554 u32 mask, flags;
2555
2556
2557
2558 if (opendata->o_res.access_supported == 0)
2559 return 0;
2560
2561 mask = 0;
2562
2563
2564
2565
2566 if (openflags & __FMODE_EXEC) {
2567
2568 if (S_ISDIR(state->inode->i_mode))
2569 mask = NFS4_ACCESS_LOOKUP;
2570 else
2571 mask = NFS4_ACCESS_EXECUTE;
2572 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2573 mask = NFS4_ACCESS_READ;
2574
2575 cache.cred = cred;
2576 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2577 nfs_access_add_cache(state->inode, &cache);
2578
2579 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2580 if ((mask & ~cache.mask & flags) == 0)
2581 return 0;
2582
2583 return -EACCES;
2584}
2585
2586
2587
2588
2589static int _nfs4_proc_open(struct nfs4_opendata *data,
2590 struct nfs_open_context *ctx)
2591{
2592 struct inode *dir = d_inode(data->dir);
2593 struct nfs_server *server = NFS_SERVER(dir);
2594 struct nfs_openargs *o_arg = &data->o_arg;
2595 struct nfs_openres *o_res = &data->o_res;
2596 int status;
2597
2598 status = nfs4_run_open_task(data, ctx);
2599 if (!data->rpc_done)
2600 return status;
2601 if (status != 0) {
2602 if (status == -NFS4ERR_BADNAME &&
2603 !(o_arg->open_flags & O_CREAT))
2604 return -ENOENT;
2605 return status;
2606 }
2607
2608 nfs_fattr_map_and_free_names(server, &data->f_attr);
2609
2610 if (o_arg->open_flags & O_CREAT) {
2611 if (o_arg->open_flags & O_EXCL)
2612 data->file_created = true;
2613 else if (o_res->cinfo.before != o_res->cinfo.after)
2614 data->file_created = true;
2615 if (data->file_created ||
2616 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2617 update_changeattr(dir, &o_res->cinfo,
2618 o_res->f_attr->time_start, 0);
2619 }
2620 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2621 server->caps &= ~NFS_CAP_POSIX_LOCK;
2622 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2623 status = _nfs4_proc_open_confirm(data);
2624 if (status != 0)
2625 return status;
2626 }
2627 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2628 nfs4_sequence_free_slot(&o_res->seq_res);
2629 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2630 o_res->f_label, NULL);
2631 }
2632 return 0;
2633}
2634
2635
2636
2637
2638
2639
2640static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2641{
2642 struct nfs4_opendata *opendata;
2643 int ret;
2644
2645 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2646 NFS4_OPEN_CLAIM_FH);
2647 if (IS_ERR(opendata))
2648 return PTR_ERR(opendata);
2649 ret = nfs4_open_recover(opendata, state);
2650 if (ret == -ESTALE)
2651 d_drop(ctx->dentry);
2652 nfs4_opendata_put(opendata);
2653 return ret;
2654}
2655
2656static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2657{
2658 struct nfs_server *server = NFS_SERVER(state->inode);
2659 struct nfs4_exception exception = { };
2660 int err;
2661
2662 do {
2663 err = _nfs4_open_expired(ctx, state);
2664 trace_nfs4_open_expired(ctx, 0, err);
2665 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2666 continue;
2667 switch (err) {
2668 default:
2669 goto out;
2670 case -NFS4ERR_GRACE:
2671 case -NFS4ERR_DELAY:
2672 nfs4_handle_exception(server, err, &exception);
2673 err = 0;
2674 }
2675 } while (exception.retry);
2676out:
2677 return err;
2678}
2679
2680static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2681{
2682 struct nfs_open_context *ctx;
2683 int ret;
2684
2685 ctx = nfs4_state_find_open_context(state);
2686 if (IS_ERR(ctx))
2687 return -EAGAIN;
2688 ret = nfs4_do_open_expired(ctx, state);
2689 put_nfs_open_context(ctx);
2690 return ret;
2691}
2692
2693static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2694 const nfs4_stateid *stateid)
2695{
2696 nfs_remove_bad_delegation(state->inode, stateid);
2697 nfs_state_clear_delegation(state);
2698}
2699
2700static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2701{
2702 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2703 nfs_finish_clear_delegation_stateid(state, NULL);
2704}
2705
2706static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2707{
2708
2709 nfs40_clear_delegation_stateid(state);
2710 nfs_state_clear_open_state_flags(state);
2711 return nfs4_open_expired(sp, state);
2712}
2713
2714static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2715 nfs4_stateid *stateid,
2716 const struct cred *cred)
2717{
2718 return -NFS4ERR_BAD_STATEID;
2719}
2720
2721#if defined(CONFIG_NFS_V4_1)
2722static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2723 nfs4_stateid *stateid,
2724 const struct cred *cred)
2725{
2726 int status;
2727
2728 switch (stateid->type) {
2729 default:
2730 break;
2731 case NFS4_INVALID_STATEID_TYPE:
2732 case NFS4_SPECIAL_STATEID_TYPE:
2733 return -NFS4ERR_BAD_STATEID;
2734 case NFS4_REVOKED_STATEID_TYPE:
2735 goto out_free;
2736 }
2737
2738 status = nfs41_test_stateid(server, stateid, cred);
2739 switch (status) {
2740 case -NFS4ERR_EXPIRED:
2741 case -NFS4ERR_ADMIN_REVOKED:
2742 case -NFS4ERR_DELEG_REVOKED:
2743 break;
2744 default:
2745 return status;
2746 }
2747out_free:
2748
2749 nfs41_free_stateid(server, stateid, cred, true);
2750 return -NFS4ERR_EXPIRED;
2751}
2752
2753static int nfs41_check_delegation_stateid(struct nfs4_state *state)
2754{
2755 struct nfs_server *server = NFS_SERVER(state->inode);
2756 nfs4_stateid stateid;
2757 struct nfs_delegation *delegation;
2758 const struct cred *cred = NULL;
2759 int status, ret = NFS_OK;
2760
2761
2762 rcu_read_lock();
2763 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2764 if (delegation == NULL) {
2765 rcu_read_unlock();
2766 nfs_state_clear_delegation(state);
2767 return NFS_OK;
2768 }
2769
2770 nfs4_stateid_copy(&stateid, &delegation->stateid);
2771
2772 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2773 &delegation->flags)) {
2774 rcu_read_unlock();
2775 return NFS_OK;
2776 }
2777
2778 if (delegation->cred)
2779 cred = get_cred(delegation->cred);
2780 rcu_read_unlock();
2781 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2782 trace_nfs4_test_delegation_stateid(state, NULL, status);
2783 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2784 nfs_finish_clear_delegation_stateid(state, &stateid);
2785 else
2786 ret = status;
2787
2788 put_cred(cred);
2789 return ret;
2790}
2791
2792static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2793{
2794 nfs4_stateid tmp;
2795
2796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2797 nfs4_copy_delegation_stateid(state->inode, state->state,
2798 &tmp, NULL) &&
2799 nfs4_stateid_match_other(&state->stateid, &tmp))
2800 nfs_state_set_delegation(state, &tmp, state->state);
2801 else
2802 nfs_state_clear_delegation(state);
2803}
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813static int nfs41_check_expired_locks(struct nfs4_state *state)
2814{
2815 int status, ret = NFS_OK;
2816 struct nfs4_lock_state *lsp, *prev = NULL;
2817 struct nfs_server *server = NFS_SERVER(state->inode);
2818
2819 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2820 goto out;
2821
2822 spin_lock(&state->state_lock);
2823 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2824 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2825 const struct cred *cred = lsp->ls_state->owner->so_cred;
2826
2827 refcount_inc(&lsp->ls_count);
2828 spin_unlock(&state->state_lock);
2829
2830 nfs4_put_lock_state(prev);
2831 prev = lsp;
2832
2833 status = nfs41_test_and_free_expired_stateid(server,
2834 &lsp->ls_stateid,
2835 cred);
2836 trace_nfs4_test_lock_stateid(state, lsp, status);
2837 if (status == -NFS4ERR_EXPIRED ||
2838 status == -NFS4ERR_BAD_STATEID) {
2839 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2840 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2841 if (!recover_lost_locks)
2842 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2843 } else if (status != NFS_OK) {
2844 ret = status;
2845 nfs4_put_lock_state(prev);
2846 goto out;
2847 }
2848 spin_lock(&state->state_lock);
2849 }
2850 }
2851 spin_unlock(&state->state_lock);
2852 nfs4_put_lock_state(prev);
2853out:
2854 return ret;
2855}
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865static int nfs41_check_open_stateid(struct nfs4_state *state)
2866{
2867 struct nfs_server *server = NFS_SERVER(state->inode);
2868 nfs4_stateid *stateid = &state->open_stateid;
2869 const struct cred *cred = state->owner->so_cred;
2870 int status;
2871
2872 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
2873 return -NFS4ERR_BAD_STATEID;
2874 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2875 trace_nfs4_test_open_stateid(state, NULL, status);
2876 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2877 nfs_state_clear_open_state_flags(state);
2878 stateid->type = NFS4_INVALID_STATEID_TYPE;
2879 return status;
2880 }
2881 if (nfs_open_stateid_recover_openmode(state))
2882 return -NFS4ERR_OPENMODE;
2883 return NFS_OK;
2884}
2885
2886static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2887{
2888 int status;
2889
2890 status = nfs41_check_delegation_stateid(state);
2891 if (status != NFS_OK)
2892 return status;
2893 nfs41_delegation_recover_stateid(state);
2894
2895 status = nfs41_check_expired_locks(state);
2896 if (status != NFS_OK)
2897 return status;
2898 status = nfs41_check_open_stateid(state);
2899 if (status != NFS_OK)
2900 status = nfs4_open_expired(sp, state);
2901 return status;
2902}
2903#endif
2904
2905
2906
2907
2908
2909
2910static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2911 struct iattr *sattr, struct nfs4_label **label)
2912{
2913 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2914 __u32 attrset[3];
2915 unsigned ret;
2916 unsigned i;
2917
2918 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2919 attrset[i] = opendata->o_res.attrset[i];
2920 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2921 attrset[i] &= ~bitmask[i];
2922 }
2923
2924 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2925 sattr->ia_valid : 0;
2926
2927 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2928 if (sattr->ia_valid & ATTR_ATIME_SET)
2929 ret |= ATTR_ATIME_SET;
2930 else
2931 ret |= ATTR_ATIME;
2932 }
2933
2934 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2935 if (sattr->ia_valid & ATTR_MTIME_SET)
2936 ret |= ATTR_MTIME_SET;
2937 else
2938 ret |= ATTR_MTIME;
2939 }
2940
2941 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
2942 *label = NULL;
2943 return ret;
2944}
2945
2946static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2947 int flags, struct nfs_open_context *ctx)
2948{
2949 struct nfs4_state_owner *sp = opendata->owner;
2950 struct nfs_server *server = sp->so_server;
2951 struct dentry *dentry;
2952 struct nfs4_state *state;
2953 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
2954 unsigned int seq;
2955 int ret;
2956
2957 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2958
2959 ret = _nfs4_proc_open(opendata, ctx);
2960 if (ret != 0)
2961 goto out;
2962
2963 state = _nfs4_opendata_to_nfs4_state(opendata);
2964 ret = PTR_ERR(state);
2965 if (IS_ERR(state))
2966 goto out;
2967 ctx->state = state;
2968 if (server->caps & NFS_CAP_POSIX_LOCK)
2969 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2970 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2971 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2972
2973 dentry = opendata->dentry;
2974 if (d_really_is_negative(dentry)) {
2975 struct dentry *alias;
2976 d_drop(dentry);
2977 alias = d_exact_alias(dentry, state->inode);
2978 if (!alias)
2979 alias = d_splice_alias(igrab(state->inode), dentry);
2980
2981 if (alias) {
2982 dput(ctx->dentry);
2983 ctx->dentry = dentry = alias;
2984 }
2985 nfs_set_verifier(dentry,
2986 nfs_save_change_attribute(d_inode(opendata->dir)));
2987 }
2988
2989
2990 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
2991
2992 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
2993 acc_mode, flags);
2994 if (ret != 0)
2995 goto out;
2996
2997 if (d_inode(dentry) == state->inode) {
2998 nfs_inode_attach_open_context(ctx);
2999 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3000 nfs4_schedule_stateid_recovery(server, state);
3001 }
3002
3003out:
3004 if (!opendata->cancelled)
3005 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
3006 return ret;
3007}
3008
3009
3010
3011
3012static int _nfs4_do_open(struct inode *dir,
3013 struct nfs_open_context *ctx,
3014 int flags,
3015 const struct nfs4_open_createattrs *c,
3016 int *opened)
3017{
3018 struct nfs4_state_owner *sp;
3019 struct nfs4_state *state = NULL;
3020 struct nfs_server *server = NFS_SERVER(dir);
3021 struct nfs4_opendata *opendata;
3022 struct dentry *dentry = ctx->dentry;
3023 const struct cred *cred = ctx->cred;
3024 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
3025 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
3026 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
3027 struct iattr *sattr = c->sattr;
3028 struct nfs4_label *label = c->label;
3029 struct nfs4_label *olabel = NULL;
3030 int status;
3031
3032
3033 status = -ENOMEM;
3034 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3035 if (sp == NULL) {
3036 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3037 goto out_err;
3038 }
3039 status = nfs4_client_recover_expired_lease(server->nfs_client);
3040 if (status != 0)
3041 goto err_put_state_owner;
3042 if (d_really_is_positive(dentry))
3043 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
3044 status = -ENOMEM;
3045 if (d_really_is_positive(dentry))
3046 claim = NFS4_OPEN_CLAIM_FH;
3047 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3048 c, claim, GFP_KERNEL);
3049 if (opendata == NULL)
3050 goto err_put_state_owner;
3051
3052 if (label) {
3053 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3054 if (IS_ERR(olabel)) {
3055 status = PTR_ERR(olabel);
3056 goto err_opendata_put;
3057 }
3058 }
3059
3060 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3061 if (!opendata->f_attr.mdsthreshold) {
3062 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3063 if (!opendata->f_attr.mdsthreshold)
3064 goto err_free_label;
3065 }
3066 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
3067 }
3068 if (d_really_is_positive(dentry))
3069 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
3070
3071 status = _nfs4_open_and_get_state(opendata, flags, ctx);
3072 if (status != 0)
3073 goto err_free_label;
3074 state = ctx->state;
3075
3076 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
3077 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
3078 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
3079
3080
3081
3082
3083 if (attrs || label) {
3084 unsigned ia_old = sattr->ia_valid;
3085
3086 sattr->ia_valid = attrs;
3087 nfs_fattr_init(opendata->o_res.f_attr);
3088 status = nfs4_do_setattr(state->inode, cred,
3089 opendata->o_res.f_attr, sattr,
3090 ctx, label, olabel);
3091 if (status == 0) {
3092 nfs_setattr_update_inode(state->inode, sattr,
3093 opendata->o_res.f_attr);
3094 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3095 }
3096 sattr->ia_valid = ia_old;
3097 }
3098 }
3099 if (opened && opendata->file_created)
3100 *opened = 1;
3101
3102 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
3103 *ctx_th = opendata->f_attr.mdsthreshold;
3104 opendata->f_attr.mdsthreshold = NULL;
3105 }
3106
3107 nfs4_label_free(olabel);
3108
3109 nfs4_opendata_put(opendata);
3110 nfs4_put_state_owner(sp);
3111 return 0;
3112err_free_label:
3113 nfs4_label_free(olabel);
3114err_opendata_put:
3115 nfs4_opendata_put(opendata);
3116err_put_state_owner:
3117 nfs4_put_state_owner(sp);
3118out_err:
3119 return status;
3120}
3121
3122
3123static struct nfs4_state *nfs4_do_open(struct inode *dir,
3124 struct nfs_open_context *ctx,
3125 int flags,
3126 struct iattr *sattr,
3127 struct nfs4_label *label,
3128 int *opened)
3129{
3130 struct nfs_server *server = NFS_SERVER(dir);
3131 struct nfs4_exception exception = {
3132 .interruptible = true,
3133 };
3134 struct nfs4_state *res;
3135 struct nfs4_open_createattrs c = {
3136 .label = label,
3137 .sattr = sattr,
3138 .verf = {
3139 [0] = (__u32)jiffies,
3140 [1] = (__u32)current->pid,
3141 },
3142 };
3143 int status;
3144
3145 do {
3146 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3147 res = ctx->state;
3148 trace_nfs4_open_file(ctx, flags, status);
3149 if (status == 0)
3150 break;
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162 if (status == -NFS4ERR_BAD_SEQID) {
3163 pr_warn_ratelimited("NFS: v4 server %s "
3164 " returned a bad sequence-id error!\n",
3165 NFS_SERVER(dir)->nfs_client->cl_hostname);
3166 exception.retry = 1;
3167 continue;
3168 }
3169
3170
3171
3172
3173
3174
3175 if (status == -NFS4ERR_BAD_STATEID) {
3176 exception.retry = 1;
3177 continue;
3178 }
3179 if (status == -EAGAIN) {
3180
3181 exception.retry = 1;
3182 continue;
3183 }
3184 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3185 continue;
3186 res = ERR_PTR(nfs4_handle_exception(server,
3187 status, &exception));
3188 } while (exception.retry);
3189 return res;
3190}
3191
3192static int _nfs4_do_setattr(struct inode *inode,
3193 struct nfs_setattrargs *arg,
3194 struct nfs_setattrres *res,
3195 const struct cred *cred,
3196 struct nfs_open_context *ctx)
3197{
3198 struct nfs_server *server = NFS_SERVER(inode);
3199 struct rpc_message msg = {
3200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3201 .rpc_argp = arg,
3202 .rpc_resp = res,
3203 .rpc_cred = cred,
3204 };
3205 const struct cred *delegation_cred = NULL;
3206 unsigned long timestamp = jiffies;
3207 bool truncate;
3208 int status;
3209
3210 nfs_fattr_init(res->fattr);
3211
3212
3213 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3214 if (!truncate)
3215 goto zero_stateid;
3216
3217 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
3218
3219 } else if (ctx != NULL && ctx->state) {
3220 struct nfs_lock_context *l_ctx;
3221 if (!nfs4_valid_open_stateid(ctx->state))
3222 return -EBADF;
3223 l_ctx = nfs_get_lock_context(ctx);
3224 if (IS_ERR(l_ctx))
3225 return PTR_ERR(l_ctx);
3226 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3227 &arg->stateid, &delegation_cred);
3228 nfs_put_lock_context(l_ctx);
3229 if (status == -EIO)
3230 return -EBADF;
3231 } else {
3232zero_stateid:
3233 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3234 }
3235 if (delegation_cred)
3236 msg.rpc_cred = delegation_cred;
3237
3238 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3239
3240 put_cred(delegation_cred);
3241 if (status == 0 && ctx != NULL)
3242 renew_lease(server, timestamp);
3243 trace_nfs4_setattr(inode, &arg->stateid, status);
3244 return status;
3245}
3246
3247static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
3248 struct nfs_fattr *fattr, struct iattr *sattr,
3249 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
3250 struct nfs4_label *olabel)
3251{
3252 struct nfs_server *server = NFS_SERVER(inode);
3253 __u32 bitmask[NFS4_BITMASK_SZ];
3254 struct nfs4_state *state = ctx ? ctx->state : NULL;
3255 struct nfs_setattrargs arg = {
3256 .fh = NFS_FH(inode),
3257 .iap = sattr,
3258 .server = server,
3259 .bitmask = bitmask,
3260 .label = ilabel,
3261 };
3262 struct nfs_setattrres res = {
3263 .fattr = fattr,
3264 .label = olabel,
3265 .server = server,
3266 };
3267 struct nfs4_exception exception = {
3268 .state = state,
3269 .inode = inode,
3270 .stateid = &arg.stateid,
3271 };
3272 int err;
3273
3274 do {
3275 nfs4_bitmap_copy_adjust_setattr(bitmask,
3276 nfs4_bitmask(server, olabel),
3277 inode);
3278
3279 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3280 switch (err) {
3281 case -NFS4ERR_OPENMODE:
3282 if (!(sattr->ia_valid & ATTR_SIZE)) {
3283 pr_warn_once("NFSv4: server %s is incorrectly "
3284 "applying open mode checks to "
3285 "a SETATTR that is not "
3286 "changing file size.\n",
3287 server->nfs_client->cl_hostname);
3288 }
3289 if (state && !(state->state & FMODE_WRITE)) {
3290 err = -EBADF;
3291 if (sattr->ia_valid & ATTR_OPEN)
3292 err = -EACCES;
3293 goto out;
3294 }
3295 }
3296 err = nfs4_handle_exception(server, err, &exception);
3297 } while (exception.retry);
3298out:
3299 return err;
3300}
3301
3302static bool
3303nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3304{
3305 if (inode == NULL || !nfs_have_layout(inode))
3306 return false;
3307
3308 return pnfs_wait_on_layoutreturn(inode, task);
3309}
3310
3311struct nfs4_closedata {
3312 struct inode *inode;
3313 struct nfs4_state *state;
3314 struct nfs_closeargs arg;
3315 struct nfs_closeres res;
3316 struct {
3317 struct nfs4_layoutreturn_args arg;
3318 struct nfs4_layoutreturn_res res;
3319 struct nfs4_xdr_opaque_data ld_private;
3320 u32 roc_barrier;
3321 bool roc;
3322 } lr;
3323 struct nfs_fattr fattr;
3324 unsigned long timestamp;
3325};
3326
3327static void nfs4_free_closedata(void *data)
3328{
3329 struct nfs4_closedata *calldata = data;
3330 struct nfs4_state_owner *sp = calldata->state->owner;
3331 struct super_block *sb = calldata->state->inode->i_sb;
3332
3333 if (calldata->lr.roc)
3334 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3335 calldata->res.lr_ret);
3336 nfs4_put_open_state(calldata->state);
3337 nfs_free_seqid(calldata->arg.seqid);
3338 nfs4_put_state_owner(sp);
3339 nfs_sb_deactive(sb);
3340 kfree(calldata);
3341}
3342
3343static void nfs4_close_done(struct rpc_task *task, void *data)
3344{
3345 struct nfs4_closedata *calldata = data;
3346 struct nfs4_state *state = calldata->state;
3347 struct nfs_server *server = NFS_SERVER(calldata->inode);
3348 nfs4_stateid *res_stateid = NULL;
3349 struct nfs4_exception exception = {
3350 .state = state,
3351 .inode = calldata->inode,
3352 .stateid = &calldata->arg.stateid,
3353 };
3354
3355 dprintk("%s: begin!\n", __func__);
3356 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3357 return;
3358 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3359
3360
3361 if (calldata->arg.lr_args && task->tk_status != 0) {
3362 switch (calldata->res.lr_ret) {
3363 default:
3364 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3365 break;
3366 case 0:
3367 calldata->arg.lr_args = NULL;
3368 calldata->res.lr_res = NULL;
3369 break;
3370 case -NFS4ERR_OLD_STATEID:
3371 if (nfs4_layoutreturn_refresh_stateid(&calldata->arg.lr_args->stateid,
3372 &calldata->arg.lr_args->range,
3373 calldata->inode))
3374 goto lr_restart;
3375
3376 case -NFS4ERR_ADMIN_REVOKED:
3377 case -NFS4ERR_DELEG_REVOKED:
3378 case -NFS4ERR_EXPIRED:
3379 case -NFS4ERR_BAD_STATEID:
3380 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3381 case -NFS4ERR_WRONG_CRED:
3382 calldata->arg.lr_args = NULL;
3383 calldata->res.lr_res = NULL;
3384 goto lr_restart;
3385 }
3386 }
3387
3388
3389
3390
3391 switch (task->tk_status) {
3392 case 0:
3393 res_stateid = &calldata->res.stateid;
3394 renew_lease(server, calldata->timestamp);
3395 break;
3396 case -NFS4ERR_ACCESS:
3397 if (calldata->arg.bitmask != NULL) {
3398 calldata->arg.bitmask = NULL;
3399 calldata->res.fattr = NULL;
3400 goto out_restart;
3401
3402 }
3403 break;
3404 case -NFS4ERR_OLD_STATEID:
3405
3406 if (nfs4_refresh_open_stateid(&calldata->arg.stateid,
3407 state))
3408 goto out_restart;
3409 goto out_release;
3410 case -NFS4ERR_ADMIN_REVOKED:
3411 case -NFS4ERR_STALE_STATEID:
3412 case -NFS4ERR_EXPIRED:
3413 nfs4_free_revoked_stateid(server,
3414 &calldata->arg.stateid,
3415 task->tk_msg.rpc_cred);
3416
3417 case -NFS4ERR_BAD_STATEID:
3418 break;
3419 default:
3420 task->tk_status = nfs4_async_handle_exception(task,
3421 server, task->tk_status, &exception);
3422 if (exception.retry)
3423 goto out_restart;
3424 }
3425 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3426 res_stateid, calldata->arg.fmode);
3427out_release:
3428 task->tk_status = 0;
3429 nfs_release_seqid(calldata->arg.seqid);
3430 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3431 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3432 return;
3433lr_restart:
3434 calldata->res.lr_ret = 0;
3435out_restart:
3436 task->tk_status = 0;
3437 rpc_restart_call_prepare(task);
3438 goto out_release;
3439}
3440
3441static void nfs4_close_prepare(struct rpc_task *task, void *data)
3442{
3443 struct nfs4_closedata *calldata = data;
3444 struct nfs4_state *state = calldata->state;
3445 struct inode *inode = calldata->inode;
3446 struct pnfs_layout_hdr *lo;
3447 bool is_rdonly, is_wronly, is_rdwr;
3448 int call_close = 0;
3449
3450 dprintk("%s: begin!\n", __func__);
3451 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3452 goto out_wait;
3453
3454 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3455 spin_lock(&state->owner->so_lock);
3456 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3457 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3458 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3459
3460 calldata->arg.fmode = 0;
3461 if (state->n_rdwr == 0) {
3462 if (state->n_rdonly == 0)
3463 call_close |= is_rdonly;
3464 else if (is_rdonly)
3465 calldata->arg.fmode |= FMODE_READ;
3466 if (state->n_wronly == 0)
3467 call_close |= is_wronly;
3468 else if (is_wronly)
3469 calldata->arg.fmode |= FMODE_WRITE;
3470 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3471 call_close |= is_rdwr;
3472 } else if (is_rdwr)
3473 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3474
3475 if (!nfs4_valid_open_stateid(state) ||
3476 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state))
3477 call_close = 0;
3478 spin_unlock(&state->owner->so_lock);
3479
3480 if (!call_close) {
3481
3482 goto out_no_action;
3483 }
3484
3485 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3486 nfs_release_seqid(calldata->arg.seqid);
3487 goto out_wait;
3488 }
3489
3490 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3491 if (lo && !pnfs_layout_is_valid(lo)) {
3492 calldata->arg.lr_args = NULL;
3493 calldata->res.lr_res = NULL;
3494 }
3495
3496 if (calldata->arg.fmode == 0)
3497 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3498
3499 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3500
3501 if (!nfs4_have_delegation(inode, FMODE_READ))
3502 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3503 else
3504 calldata->arg.bitmask = NULL;
3505 }
3506
3507 calldata->arg.share_access =
3508 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3509 calldata->arg.fmode, 0);
3510
3511 if (calldata->res.fattr == NULL)
3512 calldata->arg.bitmask = NULL;
3513 else if (calldata->arg.bitmask == NULL)
3514 calldata->res.fattr = NULL;
3515 calldata->timestamp = jiffies;
3516 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3517 &calldata->arg.seq_args,
3518 &calldata->res.seq_res,
3519 task) != 0)
3520 nfs_release_seqid(calldata->arg.seqid);
3521 dprintk("%s: done!\n", __func__);
3522 return;
3523out_no_action:
3524 task->tk_action = NULL;
3525out_wait:
3526 nfs4_sequence_done(task, &calldata->res.seq_res);
3527}
3528
3529static const struct rpc_call_ops nfs4_close_ops = {
3530 .rpc_call_prepare = nfs4_close_prepare,
3531 .rpc_call_done = nfs4_close_done,
3532 .rpc_release = nfs4_free_closedata,
3533};
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3547{
3548 struct nfs_server *server = NFS_SERVER(state->inode);
3549 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3550 struct nfs4_closedata *calldata;
3551 struct nfs4_state_owner *sp = state->owner;
3552 struct rpc_task *task;
3553 struct rpc_message msg = {
3554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3555 .rpc_cred = state->owner->so_cred,
3556 };
3557 struct rpc_task_setup task_setup_data = {
3558 .rpc_client = server->client,
3559 .rpc_message = &msg,
3560 .callback_ops = &nfs4_close_ops,
3561 .workqueue = nfsiod_workqueue,
3562 .flags = RPC_TASK_ASYNC,
3563 };
3564 int status = -ENOMEM;
3565
3566 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3567 &task_setup_data.rpc_client, &msg);
3568
3569 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3570 if (calldata == NULL)
3571 goto out;
3572 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
3573 calldata->inode = state->inode;
3574 calldata->state = state;
3575 calldata->arg.fh = NFS_FH(state->inode);
3576 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3577 goto out_free_calldata;
3578
3579 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3580 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3581 if (IS_ERR(calldata->arg.seqid))
3582 goto out_free_calldata;
3583 nfs_fattr_init(&calldata->fattr);
3584 calldata->arg.fmode = 0;
3585 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3586 calldata->res.fattr = &calldata->fattr;
3587 calldata->res.seqid = calldata->arg.seqid;
3588 calldata->res.server = server;
3589 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3590 calldata->lr.roc = pnfs_roc(state->inode,
3591 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3592 if (calldata->lr.roc) {
3593 calldata->arg.lr_args = &calldata->lr.arg;
3594 calldata->res.lr_res = &calldata->lr.res;
3595 }
3596 nfs_sb_active(calldata->inode->i_sb);
3597
3598 msg.rpc_argp = &calldata->arg;
3599 msg.rpc_resp = &calldata->res;
3600 task_setup_data.callback_data = calldata;
3601 task = rpc_run_task(&task_setup_data);
3602 if (IS_ERR(task))
3603 return PTR_ERR(task);
3604 status = 0;
3605 if (wait)
3606 status = rpc_wait_for_completion_task(task);
3607 rpc_put_task(task);
3608 return status;
3609out_free_calldata:
3610 kfree(calldata);
3611out:
3612 nfs4_put_open_state(state);
3613 nfs4_put_state_owner(sp);
3614 return status;
3615}
3616
3617static struct inode *
3618nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3619 int open_flags, struct iattr *attr, int *opened)
3620{
3621 struct nfs4_state *state;
3622 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3623
3624 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3625
3626
3627 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3628
3629 nfs4_label_release_security(label);
3630
3631 if (IS_ERR(state))
3632 return ERR_CAST(state);
3633 return state->inode;
3634}
3635
3636static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3637{
3638 if (ctx->state == NULL)
3639 return;
3640 if (is_sync)
3641 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
3642 else
3643 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
3644}
3645
3646#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3647#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3648#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3649
3650static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3651{
3652 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3653 struct nfs4_server_caps_arg args = {
3654 .fhandle = fhandle,
3655 .bitmask = bitmask,
3656 };
3657 struct nfs4_server_caps_res res = {};
3658 struct rpc_message msg = {
3659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3660 .rpc_argp = &args,
3661 .rpc_resp = &res,
3662 };
3663 int status;
3664 int i;
3665
3666 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3667 FATTR4_WORD0_FH_EXPIRE_TYPE |
3668 FATTR4_WORD0_LINK_SUPPORT |
3669 FATTR4_WORD0_SYMLINK_SUPPORT |
3670 FATTR4_WORD0_ACLSUPPORT;
3671 if (minorversion)
3672 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3673
3674 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3675 if (status == 0) {
3676
3677 switch (minorversion) {
3678 case 0:
3679 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3680 res.attr_bitmask[2] = 0;
3681 break;
3682 case 1:
3683 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3684 break;
3685 case 2:
3686 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3687 }
3688 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3689 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3690 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3691 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3692 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3693 NFS_CAP_CTIME|NFS_CAP_MTIME|
3694 NFS_CAP_SECURITY_LABEL);
3695 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3696 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3697 server->caps |= NFS_CAP_ACLS;
3698 if (res.has_links != 0)
3699 server->caps |= NFS_CAP_HARDLINKS;
3700 if (res.has_symlinks != 0)
3701 server->caps |= NFS_CAP_SYMLINKS;
3702 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3703 server->caps |= NFS_CAP_FILEID;
3704 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3705 server->caps |= NFS_CAP_MODE;
3706 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3707 server->caps |= NFS_CAP_NLINK;
3708 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3709 server->caps |= NFS_CAP_OWNER;
3710 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3711 server->caps |= NFS_CAP_OWNER_GROUP;
3712 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3713 server->caps |= NFS_CAP_ATIME;
3714 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3715 server->caps |= NFS_CAP_CTIME;
3716 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3717 server->caps |= NFS_CAP_MTIME;
3718#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3719 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3720 server->caps |= NFS_CAP_SECURITY_LABEL;
3721#endif
3722 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3723 sizeof(server->attr_bitmask));
3724 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3725
3726 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3727 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3728 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3729 server->cache_consistency_bitmask[2] = 0;
3730
3731
3732 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3733 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3734 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3735 sizeof(server->exclcreat_bitmask));
3736
3737 server->acl_bitmask = res.acl_bitmask;
3738 server->fh_expire_type = res.fh_expire_type;
3739 }
3740
3741 return status;
3742}
3743
3744int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3745{
3746 struct nfs4_exception exception = {
3747 .interruptible = true,
3748 };
3749 int err;
3750 do {
3751 err = nfs4_handle_exception(server,
3752 _nfs4_server_capabilities(server, fhandle),
3753 &exception);
3754 } while (exception.retry);
3755 return err;
3756}
3757
3758static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3759 struct nfs_fsinfo *info)
3760{
3761 u32 bitmask[3];
3762 struct nfs4_lookup_root_arg args = {
3763 .bitmask = bitmask,
3764 };
3765 struct nfs4_lookup_res res = {
3766 .server = server,
3767 .fattr = info->fattr,
3768 .fh = fhandle,
3769 };
3770 struct rpc_message msg = {
3771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3772 .rpc_argp = &args,
3773 .rpc_resp = &res,
3774 };
3775
3776 bitmask[0] = nfs4_fattr_bitmap[0];
3777 bitmask[1] = nfs4_fattr_bitmap[1];
3778
3779
3780
3781 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3782
3783 nfs_fattr_init(info->fattr);
3784 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3785}
3786
3787static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3788 struct nfs_fsinfo *info)
3789{
3790 struct nfs4_exception exception = {
3791 .interruptible = true,
3792 };
3793 int err;
3794 do {
3795 err = _nfs4_lookup_root(server, fhandle, info);
3796 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3797 switch (err) {
3798 case 0:
3799 case -NFS4ERR_WRONGSEC:
3800 goto out;
3801 default:
3802 err = nfs4_handle_exception(server, err, &exception);
3803 }
3804 } while (exception.retry);
3805out:
3806 return err;
3807}
3808
3809static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3810 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3811{
3812 struct rpc_auth_create_args auth_args = {
3813 .pseudoflavor = flavor,
3814 };
3815 struct rpc_auth *auth;
3816
3817 auth = rpcauth_create(&auth_args, server->client);
3818 if (IS_ERR(auth))
3819 return -EACCES;
3820 return nfs4_lookup_root(server, fhandle, info);
3821}
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3833 struct nfs_fsinfo *info)
3834{
3835
3836 static const rpc_authflavor_t flav_array[] = {
3837 RPC_AUTH_GSS_KRB5P,
3838 RPC_AUTH_GSS_KRB5I,
3839 RPC_AUTH_GSS_KRB5,
3840 RPC_AUTH_UNIX,
3841 RPC_AUTH_NULL,
3842 };
3843 int status = -EPERM;
3844 size_t i;
3845
3846 if (server->auth_info.flavor_len > 0) {
3847
3848 for (i = 0; i < server->auth_info.flavor_len; i++) {
3849 status = nfs4_lookup_root_sec(server, fhandle, info,
3850 server->auth_info.flavors[i]);
3851 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3852 continue;
3853 break;
3854 }
3855 } else {
3856
3857 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3858 status = nfs4_lookup_root_sec(server, fhandle, info,
3859 flav_array[i]);
3860 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3861 continue;
3862 break;
3863 }
3864 }
3865
3866
3867
3868
3869
3870
3871
3872
3873 if (status == -EACCES)
3874 status = -EPERM;
3875 return status;
3876}
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3888 struct nfs_fsinfo *info,
3889 bool auth_probe)
3890{
3891 int status = 0;
3892
3893 if (!auth_probe)
3894 status = nfs4_lookup_root(server, fhandle, info);
3895
3896 if (auth_probe || status == NFS4ERR_WRONGSEC)
3897 status = server->nfs_client->cl_mvops->find_root_sec(server,
3898 fhandle, info);
3899
3900 if (status == 0)
3901 status = nfs4_server_capabilities(server, fhandle);
3902 if (status == 0)
3903 status = nfs4_do_fsinfo(server, fhandle, info);
3904
3905 return nfs4_map_errors(status);
3906}
3907
3908static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3909 struct nfs_fsinfo *info)
3910{
3911 int error;
3912 struct nfs_fattr *fattr = info->fattr;
3913 struct nfs4_label *label = NULL;
3914
3915 error = nfs4_server_capabilities(server, mntfh);
3916 if (error < 0) {
3917 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3918 return error;
3919 }
3920
3921 label = nfs4_label_alloc(server, GFP_KERNEL);
3922 if (IS_ERR(label))
3923 return PTR_ERR(label);
3924
3925 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
3926 if (error < 0) {
3927 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3928 goto err_free_label;
3929 }
3930
3931 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3932 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3933 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3934
3935err_free_label:
3936 nfs4_label_free(label);
3937
3938 return error;
3939}
3940
3941
3942
3943
3944
3945
3946static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3947 const struct qstr *name, struct nfs_fattr *fattr,
3948 struct nfs_fh *fhandle)
3949{
3950 int status = -ENOMEM;
3951 struct page *page = NULL;
3952 struct nfs4_fs_locations *locations = NULL;
3953
3954 page = alloc_page(GFP_KERNEL);
3955 if (page == NULL)
3956 goto out;
3957 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3958 if (locations == NULL)
3959 goto out;
3960
3961 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3962 if (status != 0)
3963 goto out;
3964
3965
3966
3967
3968
3969
3970 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3971 dprintk("%s: server did not return a different fsid for"
3972 " a referral at %s\n", __func__, name->name);
3973 status = -NFS4ERR_MOVED;
3974 goto out;
3975 }
3976
3977 nfs_fixup_referral_attributes(&locations->fattr);
3978
3979
3980 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3981 memset(fhandle, 0, sizeof(struct nfs_fh));
3982out:
3983 if (page)
3984 __free_page(page);
3985 kfree(locations);
3986 return status;
3987}
3988
3989static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3990 struct nfs_fattr *fattr, struct nfs4_label *label,
3991 struct inode *inode)
3992{
3993 __u32 bitmask[NFS4_BITMASK_SZ];
3994 struct nfs4_getattr_arg args = {
3995 .fh = fhandle,
3996 .bitmask = bitmask,
3997 };
3998 struct nfs4_getattr_res res = {
3999 .fattr = fattr,
4000 .label = label,
4001 .server = server,
4002 };
4003 struct rpc_message msg = {
4004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4005 .rpc_argp = &args,
4006 .rpc_resp = &res,
4007 };
4008
4009 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
4010
4011 nfs_fattr_init(fattr);
4012 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4013}
4014
4015static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4016 struct nfs_fattr *fattr, struct nfs4_label *label,
4017 struct inode *inode)
4018{
4019 struct nfs4_exception exception = {
4020 .interruptible = true,
4021 };
4022 int err;
4023 do {
4024 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
4025 trace_nfs4_getattr(server, fhandle, fattr, err);
4026 err = nfs4_handle_exception(server, err,
4027 &exception);
4028 } while (exception.retry);
4029 return err;
4030}
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049static int
4050nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4051 struct iattr *sattr)
4052{
4053 struct inode *inode = d_inode(dentry);
4054 const struct cred *cred = NULL;
4055 struct nfs_open_context *ctx = NULL;
4056 struct nfs4_label *label = NULL;
4057 int status;
4058
4059 if (pnfs_ld_layoutret_on_setattr(inode) &&
4060 sattr->ia_valid & ATTR_SIZE &&
4061 sattr->ia_size < i_size_read(inode))
4062 pnfs_commit_and_return_layout(inode);
4063
4064 nfs_fattr_init(fattr);
4065
4066
4067 if (sattr->ia_valid & ATTR_OPEN)
4068 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
4069
4070
4071 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
4072 return 0;
4073
4074
4075 if (sattr->ia_valid & ATTR_FILE) {
4076
4077 ctx = nfs_file_open_context(sattr->ia_file);
4078 if (ctx)
4079 cred = ctx->cred;
4080 }
4081
4082 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4083 if (IS_ERR(label))
4084 return PTR_ERR(label);
4085
4086
4087 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
4088 nfs4_inode_make_writeable(inode);
4089
4090 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
4091 if (status == 0) {
4092 nfs_setattr_update_inode(inode, sattr, fattr);
4093 nfs_setsecurity(inode, fattr, label);
4094 }
4095 nfs4_label_free(label);
4096 return status;
4097}
4098
4099static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4100 const struct qstr *name, struct nfs_fh *fhandle,
4101 struct nfs_fattr *fattr, struct nfs4_label *label)
4102{
4103 struct nfs_server *server = NFS_SERVER(dir);
4104 int status;
4105 struct nfs4_lookup_arg args = {
4106 .bitmask = server->attr_bitmask,
4107 .dir_fh = NFS_FH(dir),
4108 .name = name,
4109 };
4110 struct nfs4_lookup_res res = {
4111 .server = server,
4112 .fattr = fattr,
4113 .label = label,
4114 .fh = fhandle,
4115 };
4116 struct rpc_message msg = {
4117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4118 .rpc_argp = &args,
4119 .rpc_resp = &res,
4120 };
4121
4122 args.bitmask = nfs4_bitmask(server, label);
4123
4124 nfs_fattr_init(fattr);
4125
4126 dprintk("NFS call lookup %s\n", name->name);
4127 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
4128 dprintk("NFS reply lookup: %d\n", status);
4129 return status;
4130}
4131
4132static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
4133{
4134 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4135 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
4136 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4137 fattr->nlink = 2;
4138}
4139
4140static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
4141 const struct qstr *name, struct nfs_fh *fhandle,
4142 struct nfs_fattr *fattr, struct nfs4_label *label)
4143{
4144 struct nfs4_exception exception = {
4145 .interruptible = true,
4146 };
4147 struct rpc_clnt *client = *clnt;
4148 int err;
4149 do {
4150 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
4151 trace_nfs4_lookup(dir, name, err);
4152 switch (err) {
4153 case -NFS4ERR_BADNAME:
4154 err = -ENOENT;
4155 goto out;
4156 case -NFS4ERR_MOVED:
4157 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
4158 if (err == -NFS4ERR_MOVED)
4159 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4160 goto out;
4161 case -NFS4ERR_WRONGSEC:
4162 err = -EPERM;
4163 if (client != *clnt)
4164 goto out;
4165 client = nfs4_negotiate_security(client, dir, name);
4166 if (IS_ERR(client))
4167 return PTR_ERR(client);
4168
4169 exception.retry = 1;
4170 break;
4171 default:
4172 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4173 }
4174 } while (exception.retry);
4175
4176out:
4177 if (err == 0)
4178 *clnt = client;
4179 else if (client != *clnt)
4180 rpc_shutdown_client(client);
4181
4182 return err;
4183}
4184
4185static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
4186 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4187 struct nfs4_label *label)
4188{
4189 int status;
4190 struct rpc_clnt *client = NFS_CLIENT(dir);
4191
4192 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
4193 if (client != NFS_CLIENT(dir)) {
4194 rpc_shutdown_client(client);
4195 nfs_fixup_secinfo_attributes(fattr);
4196 }
4197 return status;
4198}
4199
4200struct rpc_clnt *
4201nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
4202 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4203{
4204 struct rpc_clnt *client = NFS_CLIENT(dir);
4205 int status;
4206
4207 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
4208 if (status < 0)
4209 return ERR_PTR(status);
4210 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
4211}
4212
4213static int _nfs4_proc_lookupp(struct inode *inode,
4214 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4215 struct nfs4_label *label)
4216{
4217 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4218 struct nfs_server *server = NFS_SERVER(inode);
4219 int status;
4220 struct nfs4_lookupp_arg args = {
4221 .bitmask = server->attr_bitmask,
4222 .fh = NFS_FH(inode),
4223 };
4224 struct nfs4_lookupp_res res = {
4225 .server = server,
4226 .fattr = fattr,
4227 .label = label,
4228 .fh = fhandle,
4229 };
4230 struct rpc_message msg = {
4231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4232 .rpc_argp = &args,
4233 .rpc_resp = &res,
4234 };
4235
4236 args.bitmask = nfs4_bitmask(server, label);
4237
4238 nfs_fattr_init(fattr);
4239
4240 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4241 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4242 &res.seq_res, 0);
4243 dprintk("NFS reply lookupp: %d\n", status);
4244 return status;
4245}
4246
4247static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4248 struct nfs_fattr *fattr, struct nfs4_label *label)
4249{
4250 struct nfs4_exception exception = {
4251 .interruptible = true,
4252 };
4253 int err;
4254 do {
4255 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4256 trace_nfs4_lookupp(inode, err);
4257 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4258 &exception);
4259 } while (exception.retry);
4260 return err;
4261}
4262
4263static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4264{
4265 struct nfs_server *server = NFS_SERVER(inode);
4266 struct nfs4_accessargs args = {
4267 .fh = NFS_FH(inode),
4268 .access = entry->mask,
4269 };
4270 struct nfs4_accessres res = {
4271 .server = server,
4272 };
4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4275 .rpc_argp = &args,
4276 .rpc_resp = &res,
4277 .rpc_cred = entry->cred,
4278 };
4279 int status = 0;
4280
4281 if (!nfs4_have_delegation(inode, FMODE_READ)) {
4282 res.fattr = nfs_alloc_fattr();
4283 if (res.fattr == NULL)
4284 return -ENOMEM;
4285 args.bitmask = server->cache_consistency_bitmask;
4286 }
4287 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4288 if (!status) {
4289 nfs_access_set_mask(entry, res.access);
4290 if (res.fattr)
4291 nfs_refresh_inode(inode, res.fattr);
4292 }
4293 nfs_free_fattr(res.fattr);
4294 return status;
4295}
4296
4297static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4298{
4299 struct nfs4_exception exception = {
4300 .interruptible = true,
4301 };
4302 int err;
4303 do {
4304 err = _nfs4_proc_access(inode, entry);
4305 trace_nfs4_access(inode, err);
4306 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4307 &exception);
4308 } while (exception.retry);
4309 return err;
4310}
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4335 unsigned int pgbase, unsigned int pglen)
4336{
4337 struct nfs4_readlink args = {
4338 .fh = NFS_FH(inode),
4339 .pgbase = pgbase,
4340 .pglen = pglen,
4341 .pages = &page,
4342 };
4343 struct nfs4_readlink_res res;
4344 struct rpc_message msg = {
4345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4346 .rpc_argp = &args,
4347 .rpc_resp = &res,
4348 };
4349
4350 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4351}
4352
4353static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4354 unsigned int pgbase, unsigned int pglen)
4355{
4356 struct nfs4_exception exception = {
4357 .interruptible = true,
4358 };
4359 int err;
4360 do {
4361 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4362 trace_nfs4_readlink(inode, err);
4363 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4364 &exception);
4365 } while (exception.retry);
4366 return err;
4367}
4368
4369
4370
4371
4372static int
4373nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4374 int flags)
4375{
4376 struct nfs_server *server = NFS_SERVER(dir);
4377 struct nfs4_label l, *ilabel = NULL;
4378 struct nfs_open_context *ctx;
4379 struct nfs4_state *state;
4380 int status = 0;
4381
4382 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4383 if (IS_ERR(ctx))
4384 return PTR_ERR(ctx);
4385
4386 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4387
4388 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4389 sattr->ia_mode &= ~current_umask();
4390 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4391 if (IS_ERR(state)) {
4392 status = PTR_ERR(state);
4393 goto out;
4394 }
4395out:
4396 nfs4_label_release_security(ilabel);
4397 put_nfs_open_context(ctx);
4398 return status;
4399}
4400
4401static int
4402_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
4403{
4404 struct nfs_server *server = NFS_SERVER(dir);
4405 struct nfs_removeargs args = {
4406 .fh = NFS_FH(dir),
4407 .name = *name,
4408 };
4409 struct nfs_removeres res = {
4410 .server = server,
4411 };
4412 struct rpc_message msg = {
4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4414 .rpc_argp = &args,
4415 .rpc_resp = &res,
4416 };
4417 unsigned long timestamp = jiffies;
4418 int status;
4419
4420 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4421 if (status == 0) {
4422 spin_lock(&dir->i_lock);
4423 update_changeattr_locked(dir, &res.cinfo, timestamp, 0);
4424
4425 if (ftype == NF4DIR && dir->i_nlink > 2)
4426 nfs4_dec_nlink_locked(dir);
4427 spin_unlock(&dir->i_lock);
4428 }
4429 return status;
4430}
4431
4432static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
4433{
4434 struct nfs4_exception exception = {
4435 .interruptible = true,
4436 };
4437 struct inode *inode = d_inode(dentry);
4438 int err;
4439
4440 if (inode) {
4441 if (inode->i_nlink == 1)
4442 nfs4_inode_return_delegation(inode);
4443 else
4444 nfs4_inode_make_writeable(inode);
4445 }
4446 do {
4447 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
4448 trace_nfs4_remove(dir, &dentry->d_name, err);
4449 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4450 &exception);
4451 } while (exception.retry);
4452 return err;
4453}
4454
4455static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4456{
4457 struct nfs4_exception exception = {
4458 .interruptible = true,
4459 };
4460 int err;
4461
4462 do {
4463 err = _nfs4_proc_remove(dir, name, NF4DIR);
4464 trace_nfs4_remove(dir, name, err);
4465 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4466 &exception);
4467 } while (exception.retry);
4468 return err;
4469}
4470
4471static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4472 struct dentry *dentry,
4473 struct inode *inode)
4474{
4475 struct nfs_removeargs *args = msg->rpc_argp;
4476 struct nfs_removeres *res = msg->rpc_resp;
4477
4478 res->server = NFS_SB(dentry->d_sb);
4479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4480 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
4481
4482 nfs_fattr_init(res->dir_attr);
4483
4484 if (inode)
4485 nfs4_inode_return_delegation(inode);
4486}
4487
4488static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4489{
4490 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4491 &data->args.seq_args,
4492 &data->res.seq_res,
4493 task);
4494}
4495
4496static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4497{
4498 struct nfs_unlinkdata *data = task->tk_calldata;
4499 struct nfs_removeres *res = &data->res;
4500
4501 if (!nfs4_sequence_done(task, &res->seq_res))
4502 return 0;
4503 if (nfs4_async_handle_error(task, res->server, NULL,
4504 &data->timeout) == -EAGAIN)
4505 return 0;
4506 if (task->tk_status == 0)
4507 update_changeattr(dir, &res->cinfo,
4508 res->dir_attr->time_start, 0);
4509 return 1;
4510}
4511
4512static void nfs4_proc_rename_setup(struct rpc_message *msg,
4513 struct dentry *old_dentry,
4514 struct dentry *new_dentry)
4515{
4516 struct nfs_renameargs *arg = msg->rpc_argp;
4517 struct nfs_renameres *res = msg->rpc_resp;
4518 struct inode *old_inode = d_inode(old_dentry);
4519 struct inode *new_inode = d_inode(new_dentry);
4520
4521 if (old_inode)
4522 nfs4_inode_make_writeable(old_inode);
4523 if (new_inode)
4524 nfs4_inode_return_delegation(new_inode);
4525 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4526 res->server = NFS_SB(old_dentry->d_sb);
4527 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
4528}
4529
4530static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4531{
4532 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4533 &data->args.seq_args,
4534 &data->res.seq_res,
4535 task);
4536}
4537
4538static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4539 struct inode *new_dir)
4540{
4541 struct nfs_renamedata *data = task->tk_calldata;
4542 struct nfs_renameres *res = &data->res;
4543
4544 if (!nfs4_sequence_done(task, &res->seq_res))
4545 return 0;
4546 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4547 return 0;
4548
4549 if (task->tk_status == 0) {
4550 if (new_dir != old_dir) {
4551
4552 update_changeattr(old_dir, &res->old_cinfo,
4553 res->old_fattr->time_start,
4554 NFS_INO_INVALID_OTHER);
4555 update_changeattr(new_dir, &res->new_cinfo,
4556 res->new_fattr->time_start,
4557 NFS_INO_INVALID_OTHER);
4558 } else
4559 update_changeattr(old_dir, &res->old_cinfo,
4560 res->old_fattr->time_start,
4561 0);
4562 }
4563 return 1;
4564}
4565
4566static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4567{
4568 struct nfs_server *server = NFS_SERVER(inode);
4569 __u32 bitmask[NFS4_BITMASK_SZ];
4570 struct nfs4_link_arg arg = {
4571 .fh = NFS_FH(inode),
4572 .dir_fh = NFS_FH(dir),
4573 .name = name,
4574 .bitmask = bitmask,
4575 };
4576 struct nfs4_link_res res = {
4577 .server = server,
4578 .label = NULL,
4579 };
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4582 .rpc_argp = &arg,
4583 .rpc_resp = &res,
4584 };
4585 int status = -ENOMEM;
4586
4587 res.fattr = nfs_alloc_fattr();
4588 if (res.fattr == NULL)
4589 goto out;
4590
4591 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4592 if (IS_ERR(res.label)) {
4593 status = PTR_ERR(res.label);
4594 goto out;
4595 }
4596
4597 nfs4_inode_make_writeable(inode);
4598 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
4599
4600 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4601 if (!status) {
4602 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0);
4603 status = nfs_post_op_update_inode(inode, res.fattr);
4604 if (!status)
4605 nfs_setsecurity(inode, res.fattr, res.label);
4606 }
4607
4608
4609 nfs4_label_free(res.label);
4610
4611out:
4612 nfs_free_fattr(res.fattr);
4613 return status;
4614}
4615
4616static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4617{
4618 struct nfs4_exception exception = {
4619 .interruptible = true,
4620 };
4621 int err;
4622 do {
4623 err = nfs4_handle_exception(NFS_SERVER(inode),
4624 _nfs4_proc_link(inode, dir, name),
4625 &exception);
4626 } while (exception.retry);
4627 return err;
4628}
4629
4630struct nfs4_createdata {
4631 struct rpc_message msg;
4632 struct nfs4_create_arg arg;
4633 struct nfs4_create_res res;
4634 struct nfs_fh fh;
4635 struct nfs_fattr fattr;
4636 struct nfs4_label *label;
4637};
4638
4639static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4640 const struct qstr *name, struct iattr *sattr, u32 ftype)
4641{
4642 struct nfs4_createdata *data;
4643
4644 data = kzalloc(sizeof(*data), GFP_KERNEL);
4645 if (data != NULL) {
4646 struct nfs_server *server = NFS_SERVER(dir);
4647
4648 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4649 if (IS_ERR(data->label))
4650 goto out_free;
4651
4652 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4653 data->msg.rpc_argp = &data->arg;
4654 data->msg.rpc_resp = &data->res;
4655 data->arg.dir_fh = NFS_FH(dir);
4656 data->arg.server = server;
4657 data->arg.name = name;
4658 data->arg.attrs = sattr;
4659 data->arg.ftype = ftype;
4660 data->arg.bitmask = nfs4_bitmask(server, data->label);
4661 data->arg.umask = current_umask();
4662 data->res.server = server;
4663 data->res.fh = &data->fh;
4664 data->res.fattr = &data->fattr;
4665 data->res.label = data->label;
4666 nfs_fattr_init(data->res.fattr);
4667 }
4668 return data;
4669out_free:
4670 kfree(data);
4671 return NULL;
4672}
4673
4674static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4675{
4676 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4677 &data->arg.seq_args, &data->res.seq_res, 1);
4678 if (status == 0) {
4679 spin_lock(&dir->i_lock);
4680 update_changeattr_locked(dir, &data->res.dir_cinfo,
4681 data->res.fattr->time_start, 0);
4682
4683 if (data->arg.ftype == NF4DIR)
4684 nfs4_inc_nlink_locked(dir);
4685 spin_unlock(&dir->i_lock);
4686 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4687 }
4688 return status;
4689}
4690
4691static void nfs4_free_createdata(struct nfs4_createdata *data)
4692{
4693 nfs4_label_free(data->label);
4694 kfree(data);
4695}
4696
4697static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4698 struct page *page, unsigned int len, struct iattr *sattr,
4699 struct nfs4_label *label)
4700{
4701 struct nfs4_createdata *data;
4702 int status = -ENAMETOOLONG;
4703
4704 if (len > NFS4_MAXPATHLEN)
4705 goto out;
4706
4707 status = -ENOMEM;
4708 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4709 if (data == NULL)
4710 goto out;
4711
4712 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4713 data->arg.u.symlink.pages = &page;
4714 data->arg.u.symlink.len = len;
4715 data->arg.label = label;
4716
4717 status = nfs4_do_create(dir, dentry, data);
4718
4719 nfs4_free_createdata(data);
4720out:
4721 return status;
4722}
4723
4724static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4725 struct page *page, unsigned int len, struct iattr *sattr)
4726{
4727 struct nfs4_exception exception = {
4728 .interruptible = true,
4729 };
4730 struct nfs4_label l, *label = NULL;
4731 int err;
4732
4733 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4734
4735 do {
4736 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4737 trace_nfs4_symlink(dir, &dentry->d_name, err);
4738 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4739 &exception);
4740 } while (exception.retry);
4741
4742 nfs4_label_release_security(label);
4743 return err;
4744}
4745
4746static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4747 struct iattr *sattr, struct nfs4_label *label)
4748{
4749 struct nfs4_createdata *data;
4750 int status = -ENOMEM;
4751
4752 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4753 if (data == NULL)
4754 goto out;
4755
4756 data->arg.label = label;
4757 status = nfs4_do_create(dir, dentry, data);
4758
4759 nfs4_free_createdata(data);
4760out:
4761 return status;
4762}
4763
4764static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4765 struct iattr *sattr)
4766{
4767 struct nfs_server *server = NFS_SERVER(dir);
4768 struct nfs4_exception exception = {
4769 .interruptible = true,
4770 };
4771 struct nfs4_label l, *label = NULL;
4772 int err;
4773
4774 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4775
4776 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4777 sattr->ia_mode &= ~current_umask();
4778 do {
4779 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4780 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4781 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4782 &exception);
4783 } while (exception.retry);
4784 nfs4_label_release_security(label);
4785
4786 return err;
4787}
4788
4789static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4790 u64 cookie, struct page **pages, unsigned int count, bool plus)
4791{
4792 struct inode *dir = d_inode(dentry);
4793 struct nfs4_readdir_arg args = {
4794 .fh = NFS_FH(dir),
4795 .pages = pages,
4796 .pgbase = 0,
4797 .count = count,
4798 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4799 .plus = plus,
4800 };
4801 struct nfs4_readdir_res res;
4802 struct rpc_message msg = {
4803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4804 .rpc_argp = &args,
4805 .rpc_resp = &res,
4806 .rpc_cred = cred,
4807 };
4808 int status;
4809
4810 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4811 dentry,
4812 (unsigned long long)cookie);
4813 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4814 res.pgbase = args.pgbase;
4815 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4816 if (status >= 0) {
4817 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4818 status += args.pgbase;
4819 }
4820
4821 nfs_invalidate_atime(dir);
4822
4823 dprintk("%s: returns %d\n", __func__, status);
4824 return status;
4825}
4826
4827static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4828 u64 cookie, struct page **pages, unsigned int count, bool plus)
4829{
4830 struct nfs4_exception exception = {
4831 .interruptible = true,
4832 };
4833 int err;
4834 do {
4835 err = _nfs4_proc_readdir(dentry, cred, cookie,
4836 pages, count, plus);
4837 trace_nfs4_readdir(d_inode(dentry), err);
4838 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4839 &exception);
4840 } while (exception.retry);
4841 return err;
4842}
4843
4844static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4845 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4846{
4847 struct nfs4_createdata *data;
4848 int mode = sattr->ia_mode;
4849 int status = -ENOMEM;
4850
4851 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4852 if (data == NULL)
4853 goto out;
4854
4855 if (S_ISFIFO(mode))
4856 data->arg.ftype = NF4FIFO;
4857 else if (S_ISBLK(mode)) {
4858 data->arg.ftype = NF4BLK;
4859 data->arg.u.device.specdata1 = MAJOR(rdev);
4860 data->arg.u.device.specdata2 = MINOR(rdev);
4861 }
4862 else if (S_ISCHR(mode)) {
4863 data->arg.ftype = NF4CHR;
4864 data->arg.u.device.specdata1 = MAJOR(rdev);
4865 data->arg.u.device.specdata2 = MINOR(rdev);
4866 } else if (!S_ISSOCK(mode)) {
4867 status = -EINVAL;
4868 goto out_free;
4869 }
4870
4871 data->arg.label = label;
4872 status = nfs4_do_create(dir, dentry, data);
4873out_free:
4874 nfs4_free_createdata(data);
4875out:
4876 return status;
4877}
4878
4879static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4880 struct iattr *sattr, dev_t rdev)
4881{
4882 struct nfs_server *server = NFS_SERVER(dir);
4883 struct nfs4_exception exception = {
4884 .interruptible = true,
4885 };
4886 struct nfs4_label l, *label = NULL;
4887 int err;
4888
4889 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4890
4891 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4892 sattr->ia_mode &= ~current_umask();
4893 do {
4894 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4895 trace_nfs4_mknod(dir, &dentry->d_name, err);
4896 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4897 &exception);
4898 } while (exception.retry);
4899
4900 nfs4_label_release_security(label);
4901
4902 return err;
4903}
4904
4905static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4906 struct nfs_fsstat *fsstat)
4907{
4908 struct nfs4_statfs_arg args = {
4909 .fh = fhandle,
4910 .bitmask = server->attr_bitmask,
4911 };
4912 struct nfs4_statfs_res res = {
4913 .fsstat = fsstat,
4914 };
4915 struct rpc_message msg = {
4916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4917 .rpc_argp = &args,
4918 .rpc_resp = &res,
4919 };
4920
4921 nfs_fattr_init(fsstat->fattr);
4922 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4923}
4924
4925static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4926{
4927 struct nfs4_exception exception = {
4928 .interruptible = true,
4929 };
4930 int err;
4931 do {
4932 err = nfs4_handle_exception(server,
4933 _nfs4_proc_statfs(server, fhandle, fsstat),
4934 &exception);
4935 } while (exception.retry);
4936 return err;
4937}
4938
4939static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4940 struct nfs_fsinfo *fsinfo)
4941{
4942 struct nfs4_fsinfo_arg args = {
4943 .fh = fhandle,
4944 .bitmask = server->attr_bitmask,
4945 };
4946 struct nfs4_fsinfo_res res = {
4947 .fsinfo = fsinfo,
4948 };
4949 struct rpc_message msg = {
4950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4951 .rpc_argp = &args,
4952 .rpc_resp = &res,
4953 };
4954
4955 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4956}
4957
4958static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4959{
4960 struct nfs4_exception exception = {
4961 .interruptible = true,
4962 };
4963 unsigned long now = jiffies;
4964 int err;
4965
4966 do {
4967 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4968 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4969 if (err == 0) {
4970 nfs4_set_lease_period(server->nfs_client,
4971 fsinfo->lease_time * HZ,
4972 now);
4973 break;
4974 }
4975 err = nfs4_handle_exception(server, err, &exception);
4976 } while (exception.retry);
4977 return err;
4978}
4979
4980static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4981{
4982 int error;
4983
4984 nfs_fattr_init(fsinfo->fattr);
4985 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4986 if (error == 0) {
4987
4988 server->pnfs_blksize = fsinfo->blksize;
4989 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4990 }
4991
4992 return error;
4993}
4994
4995static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4996 struct nfs_pathconf *pathconf)
4997{
4998 struct nfs4_pathconf_arg args = {
4999 .fh = fhandle,
5000 .bitmask = server->attr_bitmask,
5001 };
5002 struct nfs4_pathconf_res res = {
5003 .pathconf = pathconf,
5004 };
5005 struct rpc_message msg = {
5006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5007 .rpc_argp = &args,
5008 .rpc_resp = &res,
5009 };
5010
5011
5012 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5013 memset(pathconf, 0, sizeof(*pathconf));
5014 return 0;
5015 }
5016
5017 nfs_fattr_init(pathconf->fattr);
5018 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5019}
5020
5021static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5022 struct nfs_pathconf *pathconf)
5023{
5024 struct nfs4_exception exception = {
5025 .interruptible = true,
5026 };
5027 int err;
5028
5029 do {
5030 err = nfs4_handle_exception(server,
5031 _nfs4_proc_pathconf(server, fhandle, pathconf),
5032 &exception);
5033 } while (exception.retry);
5034 return err;
5035}
5036
5037int nfs4_set_rw_stateid(nfs4_stateid *stateid,
5038 const struct nfs_open_context *ctx,
5039 const struct nfs_lock_context *l_ctx,
5040 fmode_t fmode)
5041{
5042 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
5043}
5044EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5045
5046static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5047 const struct nfs_open_context *ctx,
5048 const struct nfs_lock_context *l_ctx,
5049 fmode_t fmode)
5050{
5051 nfs4_stateid current_stateid;
5052
5053
5054 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
5055 return true;
5056 return nfs4_stateid_match(stateid, ¤t_stateid);
5057}
5058
5059static bool nfs4_error_stateid_expired(int err)
5060{
5061 switch (err) {
5062 case -NFS4ERR_DELEG_REVOKED:
5063 case -NFS4ERR_ADMIN_REVOKED:
5064 case -NFS4ERR_BAD_STATEID:
5065 case -NFS4ERR_STALE_STATEID:
5066 case -NFS4ERR_OLD_STATEID:
5067 case -NFS4ERR_OPENMODE:
5068 case -NFS4ERR_EXPIRED:
5069 return true;
5070 }
5071 return false;
5072}
5073
5074static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
5075{
5076 struct nfs_server *server = NFS_SERVER(hdr->inode);
5077
5078 trace_nfs4_read(hdr, task->tk_status);
5079 if (task->tk_status < 0) {
5080 struct nfs4_exception exception = {
5081 .inode = hdr->inode,
5082 .state = hdr->args.context->state,
5083 .stateid = &hdr->args.stateid,
5084 };
5085 task->tk_status = nfs4_async_handle_exception(task,
5086 server, task->tk_status, &exception);
5087 if (exception.retry) {
5088 rpc_restart_call_prepare(task);
5089 return -EAGAIN;
5090 }
5091 }
5092
5093 if (task->tk_status > 0)
5094 renew_lease(server, hdr->timestamp);
5095 return 0;
5096}
5097
5098static bool nfs4_read_stateid_changed(struct rpc_task *task,
5099 struct nfs_pgio_args *args)
5100{
5101
5102 if (!nfs4_error_stateid_expired(task->tk_status) ||
5103 nfs4_stateid_is_current(&args->stateid,
5104 args->context,
5105 args->lock_context,
5106 FMODE_READ))
5107 return false;
5108 rpc_restart_call_prepare(task);
5109 return true;
5110}
5111
5112static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5113{
5114
5115 dprintk("--> %s\n", __func__);
5116
5117 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5118 return -EAGAIN;
5119 if (nfs4_read_stateid_changed(task, &hdr->args))
5120 return -EAGAIN;
5121 if (task->tk_status > 0)
5122 nfs_invalidate_atime(hdr->inode);
5123 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5124 nfs4_read_done_cb(task, hdr);
5125}
5126
5127static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5128 struct rpc_message *msg)
5129{
5130 hdr->timestamp = jiffies;
5131 if (!hdr->pgio_done_cb)
5132 hdr->pgio_done_cb = nfs4_read_done_cb;
5133 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5134 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5135}
5136
5137static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5138 struct nfs_pgio_header *hdr)
5139{
5140 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
5141 &hdr->args.seq_args,
5142 &hdr->res.seq_res,
5143 task))
5144 return 0;
5145 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5146 hdr->args.lock_context,
5147 hdr->rw_mode) == -EIO)
5148 return -EIO;
5149 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
5150 return -EIO;
5151 return 0;
5152}
5153
5154static int nfs4_write_done_cb(struct rpc_task *task,
5155 struct nfs_pgio_header *hdr)
5156{
5157 struct inode *inode = hdr->inode;
5158
5159 trace_nfs4_write(hdr, task->tk_status);
5160 if (task->tk_status < 0) {
5161 struct nfs4_exception exception = {
5162 .inode = hdr->inode,
5163 .state = hdr->args.context->state,
5164 .stateid = &hdr->args.stateid,
5165 };
5166 task->tk_status = nfs4_async_handle_exception(task,
5167 NFS_SERVER(inode), task->tk_status,
5168 &exception);
5169 if (exception.retry) {
5170 rpc_restart_call_prepare(task);
5171 return -EAGAIN;
5172 }
5173 }
5174 if (task->tk_status >= 0) {
5175 renew_lease(NFS_SERVER(inode), hdr->timestamp);
5176 nfs_writeback_update_inode(hdr);
5177 }
5178 return 0;
5179}
5180
5181static bool nfs4_write_stateid_changed(struct rpc_task *task,
5182 struct nfs_pgio_args *args)
5183{
5184
5185 if (!nfs4_error_stateid_expired(task->tk_status) ||
5186 nfs4_stateid_is_current(&args->stateid,
5187 args->context,
5188 args->lock_context,
5189 FMODE_WRITE))
5190 return false;
5191 rpc_restart_call_prepare(task);
5192 return true;
5193}
5194
5195static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5196{
5197 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5198 return -EAGAIN;
5199 if (nfs4_write_stateid_changed(task, &hdr->args))
5200 return -EAGAIN;
5201 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5202 nfs4_write_done_cb(task, hdr);
5203}
5204
5205static
5206bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
5207{
5208
5209 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5210 return false;
5211
5212
5213
5214 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
5215}
5216
5217static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
5218 struct rpc_message *msg,
5219 struct rpc_clnt **clnt)
5220{
5221 struct nfs_server *server = NFS_SERVER(hdr->inode);
5222
5223 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5224 hdr->args.bitmask = NULL;
5225 hdr->res.fattr = NULL;
5226 } else
5227 hdr->args.bitmask = server->cache_consistency_bitmask;
5228
5229 if (!hdr->pgio_done_cb)
5230 hdr->pgio_done_cb = nfs4_write_done_cb;
5231 hdr->res.server = server;
5232 hdr->timestamp = jiffies;
5233
5234 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
5235 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0);
5236 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
5237}
5238
5239static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
5240{
5241 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
5242 &data->args.seq_args,
5243 &data->res.seq_res,
5244 task);
5245}
5246
5247static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
5248{
5249 struct inode *inode = data->inode;
5250
5251 trace_nfs4_commit(data, task->tk_status);
5252 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5253 NULL, NULL) == -EAGAIN) {
5254 rpc_restart_call_prepare(task);
5255 return -EAGAIN;
5256 }
5257 return 0;
5258}
5259
5260static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5261{
5262 if (!nfs4_sequence_done(task, &data->res.seq_res))
5263 return -EAGAIN;
5264 return data->commit_done_cb(task, data);
5265}
5266
5267static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5268 struct rpc_clnt **clnt)
5269{
5270 struct nfs_server *server = NFS_SERVER(data->inode);
5271
5272 if (data->commit_done_cb == NULL)
5273 data->commit_done_cb = nfs4_commit_done_cb;
5274 data->res.server = server;
5275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
5276 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5277 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
5278}
5279
5280static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5281 struct nfs_commitres *res)
5282{
5283 struct inode *dst_inode = file_inode(dst);
5284 struct nfs_server *server = NFS_SERVER(dst_inode);
5285 struct rpc_message msg = {
5286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5287 .rpc_argp = args,
5288 .rpc_resp = res,
5289 };
5290
5291 args->fh = NFS_FH(dst_inode);
5292 return nfs4_call_sync(server->client, server, &msg,
5293 &args->seq_args, &res->seq_res, 1);
5294}
5295
5296int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5297{
5298 struct nfs_commitargs args = {
5299 .offset = offset,
5300 .count = count,
5301 };
5302 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5303 struct nfs4_exception exception = { };
5304 int status;
5305
5306 do {
5307 status = _nfs4_proc_commit(dst, &args, res);
5308 status = nfs4_handle_exception(dst_server, status, &exception);
5309 } while (exception.retry);
5310
5311 return status;
5312}
5313
5314struct nfs4_renewdata {
5315 struct nfs_client *client;
5316 unsigned long timestamp;
5317};
5318
5319
5320
5321
5322
5323static void nfs4_renew_release(void *calldata)
5324{
5325 struct nfs4_renewdata *data = calldata;
5326 struct nfs_client *clp = data->client;
5327
5328 if (refcount_read(&clp->cl_count) > 1)
5329 nfs4_schedule_state_renewal(clp);
5330 nfs_put_client(clp);
5331 kfree(data);
5332}
5333
5334static void nfs4_renew_done(struct rpc_task *task, void *calldata)
5335{
5336 struct nfs4_renewdata *data = calldata;
5337 struct nfs_client *clp = data->client;
5338 unsigned long timestamp = data->timestamp;
5339
5340 trace_nfs4_renew_async(clp, task->tk_status);
5341 switch (task->tk_status) {
5342 case 0:
5343 break;
5344 case -NFS4ERR_LEASE_MOVED:
5345 nfs4_schedule_lease_moved_recovery(clp);
5346 break;
5347 default:
5348
5349 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5350 return;
5351 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5352 nfs4_schedule_lease_recovery(clp);
5353 return;
5354 }
5355 nfs4_schedule_path_down_recovery(clp);
5356 }
5357 do_renew_lease(clp, timestamp);
5358}
5359
5360static const struct rpc_call_ops nfs4_renew_ops = {
5361 .rpc_call_done = nfs4_renew_done,
5362 .rpc_release = nfs4_renew_release,
5363};
5364
5365static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
5366{
5367 struct rpc_message msg = {
5368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5369 .rpc_argp = clp,
5370 .rpc_cred = cred,
5371 };
5372 struct nfs4_renewdata *data;
5373
5374 if (renew_flags == 0)
5375 return 0;
5376 if (!refcount_inc_not_zero(&clp->cl_count))
5377 return -EIO;
5378 data = kmalloc(sizeof(*data), GFP_NOFS);
5379 if (data == NULL) {
5380 nfs_put_client(clp);
5381 return -ENOMEM;
5382 }
5383 data->client = clp;
5384 data->timestamp = jiffies;
5385 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5386 &nfs4_renew_ops, data);
5387}
5388
5389static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
5390{
5391 struct rpc_message msg = {
5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5393 .rpc_argp = clp,
5394 .rpc_cred = cred,
5395 };
5396 unsigned long now = jiffies;
5397 int status;
5398
5399 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5400 if (status < 0)
5401 return status;
5402 do_renew_lease(clp, now);
5403 return 0;
5404}
5405
5406static inline int nfs4_server_supports_acls(struct nfs_server *server)
5407{
5408 return server->caps & NFS_CAP_ACLS;
5409}
5410
5411
5412
5413
5414
5415#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5416
5417static int buf_to_pages_noslab(const void *buf, size_t buflen,
5418 struct page **pages)
5419{
5420 struct page *newpage, **spages;
5421 int rc = 0;
5422 size_t len;
5423 spages = pages;
5424
5425 do {
5426 len = min_t(size_t, PAGE_SIZE, buflen);
5427 newpage = alloc_page(GFP_KERNEL);
5428
5429 if (newpage == NULL)
5430 goto unwind;
5431 memcpy(page_address(newpage), buf, len);
5432 buf += len;
5433 buflen -= len;
5434 *pages++ = newpage;
5435 rc++;
5436 } while (buflen != 0);
5437
5438 return rc;
5439
5440unwind:
5441 for(; rc > 0; rc--)
5442 __free_page(spages[rc-1]);
5443 return -ENOMEM;
5444}
5445
5446struct nfs4_cached_acl {
5447 int cached;
5448 size_t len;
5449 char data[0];
5450};
5451
5452static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5453{
5454 struct nfs_inode *nfsi = NFS_I(inode);
5455
5456 spin_lock(&inode->i_lock);
5457 kfree(nfsi->nfs4_acl);
5458 nfsi->nfs4_acl = acl;
5459 spin_unlock(&inode->i_lock);
5460}
5461
5462static void nfs4_zap_acl_attr(struct inode *inode)
5463{
5464 nfs4_set_cached_acl(inode, NULL);
5465}
5466
5467static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5468{
5469 struct nfs_inode *nfsi = NFS_I(inode);
5470 struct nfs4_cached_acl *acl;
5471 int ret = -ENOENT;
5472
5473 spin_lock(&inode->i_lock);
5474 acl = nfsi->nfs4_acl;
5475 if (acl == NULL)
5476 goto out;
5477 if (buf == NULL)
5478 goto out_len;
5479 if (acl->cached == 0)
5480 goto out;
5481 ret = -ERANGE;
5482 if (acl->len > buflen)
5483 goto out;
5484 memcpy(buf, acl->data, acl->len);
5485out_len:
5486 ret = acl->len;
5487out:
5488 spin_unlock(&inode->i_lock);
5489 return ret;
5490}
5491
5492static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5493{
5494 struct nfs4_cached_acl *acl;
5495 size_t buflen = sizeof(*acl) + acl_len;
5496
5497 if (buflen <= PAGE_SIZE) {
5498 acl = kmalloc(buflen, GFP_KERNEL);
5499 if (acl == NULL)
5500 goto out;
5501 acl->cached = 1;
5502 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5503 } else {
5504 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5505 if (acl == NULL)
5506 goto out;
5507 acl->cached = 0;
5508 }
5509 acl->len = acl_len;
5510out:
5511 nfs4_set_cached_acl(inode, acl);
5512}
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5525{
5526 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
5527 struct nfs_getaclargs args = {
5528 .fh = NFS_FH(inode),
5529 .acl_pages = pages,
5530 .acl_len = buflen,
5531 };
5532 struct nfs_getaclres res = {
5533 .acl_len = buflen,
5534 };
5535 struct rpc_message msg = {
5536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5537 .rpc_argp = &args,
5538 .rpc_resp = &res,
5539 };
5540 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5541 int ret = -ENOMEM, i;
5542
5543 if (npages > ARRAY_SIZE(pages))
5544 return -ERANGE;
5545
5546 for (i = 0; i < npages; i++) {
5547 pages[i] = alloc_page(GFP_KERNEL);
5548 if (!pages[i])
5549 goto out_free;
5550 }
5551
5552
5553 res.acl_scratch = alloc_page(GFP_KERNEL);
5554 if (!res.acl_scratch)
5555 goto out_free;
5556
5557 args.acl_len = npages * PAGE_SIZE;
5558
5559 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5560 __func__, buf, buflen, npages, args.acl_len);
5561 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5562 &msg, &args.seq_args, &res.seq_res, 0);
5563 if (ret)
5564 goto out_free;
5565
5566
5567 if (res.acl_flags & NFS4_ACL_TRUNC) {
5568
5569 if (buf == NULL)
5570 goto out_ok;
5571 ret = -ERANGE;
5572 goto out_free;
5573 }
5574 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5575 if (buf) {
5576 if (res.acl_len > buflen) {
5577 ret = -ERANGE;
5578 goto out_free;
5579 }
5580 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5581 }
5582out_ok:
5583 ret = res.acl_len;
5584out_free:
5585 for (i = 0; i < npages; i++)
5586 if (pages[i])
5587 __free_page(pages[i]);
5588 if (res.acl_scratch)
5589 __free_page(res.acl_scratch);
5590 return ret;
5591}
5592
5593static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5594{
5595 struct nfs4_exception exception = {
5596 .interruptible = true,
5597 };
5598 ssize_t ret;
5599 do {
5600 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5601 trace_nfs4_get_acl(inode, ret);
5602 if (ret >= 0)
5603 break;
5604 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5605 } while (exception.retry);
5606 return ret;
5607}
5608
5609static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5610{
5611 struct nfs_server *server = NFS_SERVER(inode);
5612 int ret;
5613
5614 if (!nfs4_server_supports_acls(server))
5615 return -EOPNOTSUPP;
5616 ret = nfs_revalidate_inode(server, inode);
5617 if (ret < 0)
5618 return ret;
5619 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5620 nfs_zap_acl_cache(inode);
5621 ret = nfs4_read_cached_acl(inode, buf, buflen);
5622 if (ret != -ENOENT)
5623
5624
5625 return ret;
5626 return nfs4_get_acl_uncached(inode, buf, buflen);
5627}
5628
5629static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5630{
5631 struct nfs_server *server = NFS_SERVER(inode);
5632 struct page *pages[NFS4ACL_MAXPAGES];
5633 struct nfs_setaclargs arg = {
5634 .fh = NFS_FH(inode),
5635 .acl_pages = pages,
5636 .acl_len = buflen,
5637 };
5638 struct nfs_setaclres res;
5639 struct rpc_message msg = {
5640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5641 .rpc_argp = &arg,
5642 .rpc_resp = &res,
5643 };
5644 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5645 int ret, i;
5646
5647 if (!nfs4_server_supports_acls(server))
5648 return -EOPNOTSUPP;
5649 if (npages > ARRAY_SIZE(pages))
5650 return -ERANGE;
5651 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5652 if (i < 0)
5653 return i;
5654 nfs4_inode_make_writeable(inode);
5655 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5656
5657
5658
5659
5660
5661 for (; i > 0; i--)
5662 put_page(pages[i-1]);
5663
5664
5665
5666
5667
5668 spin_lock(&inode->i_lock);
5669 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
5670 | NFS_INO_INVALID_CTIME
5671 | NFS_INO_REVAL_FORCED;
5672 spin_unlock(&inode->i_lock);
5673 nfs_access_zap_cache(inode);
5674 nfs_zap_acl_cache(inode);
5675 return ret;
5676}
5677
5678static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5679{
5680 struct nfs4_exception exception = { };
5681 int err;
5682 do {
5683 err = __nfs4_proc_set_acl(inode, buf, buflen);
5684 trace_nfs4_set_acl(inode, err);
5685 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5686 &exception);
5687 } while (exception.retry);
5688 return err;
5689}
5690
5691#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5692static int _nfs4_get_security_label(struct inode *inode, void *buf,
5693 size_t buflen)
5694{
5695 struct nfs_server *server = NFS_SERVER(inode);
5696 struct nfs_fattr fattr;
5697 struct nfs4_label label = {0, 0, buflen, buf};
5698
5699 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5700 struct nfs4_getattr_arg arg = {
5701 .fh = NFS_FH(inode),
5702 .bitmask = bitmask,
5703 };
5704 struct nfs4_getattr_res res = {
5705 .fattr = &fattr,
5706 .label = &label,
5707 .server = server,
5708 };
5709 struct rpc_message msg = {
5710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5711 .rpc_argp = &arg,
5712 .rpc_resp = &res,
5713 };
5714 int ret;
5715
5716 nfs_fattr_init(&fattr);
5717
5718 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5719 if (ret)
5720 return ret;
5721 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5722 return -ENOENT;
5723 if (buflen < label.len)
5724 return -ERANGE;
5725 return 0;
5726}
5727
5728static int nfs4_get_security_label(struct inode *inode, void *buf,
5729 size_t buflen)
5730{
5731 struct nfs4_exception exception = {
5732 .interruptible = true,
5733 };
5734 int err;
5735
5736 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5737 return -EOPNOTSUPP;
5738
5739 do {
5740 err = _nfs4_get_security_label(inode, buf, buflen);
5741 trace_nfs4_get_security_label(inode, err);
5742 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5743 &exception);
5744 } while (exception.retry);
5745 return err;
5746}
5747
5748static int _nfs4_do_set_security_label(struct inode *inode,
5749 struct nfs4_label *ilabel,
5750 struct nfs_fattr *fattr,
5751 struct nfs4_label *olabel)
5752{
5753
5754 struct iattr sattr = {0};
5755 struct nfs_server *server = NFS_SERVER(inode);
5756 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5757 struct nfs_setattrargs arg = {
5758 .fh = NFS_FH(inode),
5759 .iap = &sattr,
5760 .server = server,
5761 .bitmask = bitmask,
5762 .label = ilabel,
5763 };
5764 struct nfs_setattrres res = {
5765 .fattr = fattr,
5766 .label = olabel,
5767 .server = server,
5768 };
5769 struct rpc_message msg = {
5770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5771 .rpc_argp = &arg,
5772 .rpc_resp = &res,
5773 };
5774 int status;
5775
5776 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5777
5778 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5779 if (status)
5780 dprintk("%s failed: %d\n", __func__, status);
5781
5782 return status;
5783}
5784
5785static int nfs4_do_set_security_label(struct inode *inode,
5786 struct nfs4_label *ilabel,
5787 struct nfs_fattr *fattr,
5788 struct nfs4_label *olabel)
5789{
5790 struct nfs4_exception exception = { };
5791 int err;
5792
5793 do {
5794 err = _nfs4_do_set_security_label(inode, ilabel,
5795 fattr, olabel);
5796 trace_nfs4_set_security_label(inode, err);
5797 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5798 &exception);
5799 } while (exception.retry);
5800 return err;
5801}
5802
5803static int
5804nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5805{
5806 struct nfs4_label ilabel, *olabel = NULL;
5807 struct nfs_fattr fattr;
5808 int status;
5809
5810 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5811 return -EOPNOTSUPP;
5812
5813 nfs_fattr_init(&fattr);
5814
5815 ilabel.pi = 0;
5816 ilabel.lfs = 0;
5817 ilabel.label = (char *)buf;
5818 ilabel.len = buflen;
5819
5820 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5821 if (IS_ERR(olabel)) {
5822 status = -PTR_ERR(olabel);
5823 goto out;
5824 }
5825
5826 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5827 if (status == 0)
5828 nfs_setsecurity(inode, &fattr, olabel);
5829
5830 nfs4_label_free(olabel);
5831out:
5832 return status;
5833}
5834#endif
5835
5836
5837static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5838 nfs4_verifier *bootverf)
5839{
5840 __be32 verf[2];
5841
5842 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5843
5844
5845 verf[0] = cpu_to_be32(U32_MAX);
5846 verf[1] = cpu_to_be32(U32_MAX);
5847 } else {
5848 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5849 u64 ns = ktime_to_ns(nn->boot_time);
5850
5851 verf[0] = cpu_to_be32(ns >> 32);
5852 verf[1] = cpu_to_be32(ns);
5853 }
5854 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5855}
5856
5857static int
5858nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5859{
5860 size_t len;
5861 char *str;
5862
5863 if (clp->cl_owner_id != NULL)
5864 return 0;
5865
5866 rcu_read_lock();
5867 len = 14 +
5868 strlen(clp->cl_rpcclient->cl_nodename) +
5869 1 +
5870 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5871 1;
5872 rcu_read_unlock();
5873 if (nfs4_client_id_uniquifier[0] != '\0')
5874 len += strlen(nfs4_client_id_uniquifier) + 1;
5875 if (len > NFS4_OPAQUE_LIMIT + 1)
5876 return -EINVAL;
5877
5878
5879
5880
5881
5882
5883 str = kmalloc(len, GFP_KERNEL);
5884 if (!str)
5885 return -ENOMEM;
5886
5887 rcu_read_lock();
5888 if (nfs4_client_id_uniquifier[0] != '\0')
5889 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
5890 clp->cl_rpcclient->cl_nodename,
5891 nfs4_client_id_uniquifier,
5892 rpc_peeraddr2str(clp->cl_rpcclient,
5893 RPC_DISPLAY_ADDR));
5894 else
5895 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
5896 clp->cl_rpcclient->cl_nodename,
5897 rpc_peeraddr2str(clp->cl_rpcclient,
5898 RPC_DISPLAY_ADDR));
5899 rcu_read_unlock();
5900
5901 clp->cl_owner_id = str;
5902 return 0;
5903}
5904
5905static int
5906nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5907{
5908 size_t len;
5909 char *str;
5910
5911 len = 10 + 10 + 1 + 10 + 1 +
5912 strlen(nfs4_client_id_uniquifier) + 1 +
5913 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5914
5915 if (len > NFS4_OPAQUE_LIMIT + 1)
5916 return -EINVAL;
5917
5918
5919
5920
5921
5922
5923 str = kmalloc(len, GFP_KERNEL);
5924 if (!str)
5925 return -ENOMEM;
5926
5927 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5928 clp->rpc_ops->version, clp->cl_minorversion,
5929 nfs4_client_id_uniquifier,
5930 clp->cl_rpcclient->cl_nodename);
5931 clp->cl_owner_id = str;
5932 return 0;
5933}
5934
5935static int
5936nfs4_init_uniform_client_string(struct nfs_client *clp)
5937{
5938 size_t len;
5939 char *str;
5940
5941 if (clp->cl_owner_id != NULL)
5942 return 0;
5943
5944 if (nfs4_client_id_uniquifier[0] != '\0')
5945 return nfs4_init_uniquifier_client_string(clp);
5946
5947 len = 10 + 10 + 1 + 10 + 1 +
5948 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5949
5950 if (len > NFS4_OPAQUE_LIMIT + 1)
5951 return -EINVAL;
5952
5953
5954
5955
5956
5957
5958 str = kmalloc(len, GFP_KERNEL);
5959 if (!str)
5960 return -ENOMEM;
5961
5962 scnprintf(str, len, "Linux NFSv%u.%u %s",
5963 clp->rpc_ops->version, clp->cl_minorversion,
5964 clp->cl_rpcclient->cl_nodename);
5965 clp->cl_owner_id = str;
5966 return 0;
5967}
5968
5969
5970
5971
5972
5973
5974static unsigned int
5975nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5976{
5977 if (strchr(clp->cl_ipaddr, ':') != NULL)
5978 return scnprintf(buf, len, "tcp6");
5979 else
5980 return scnprintf(buf, len, "tcp");
5981}
5982
5983static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5984{
5985 struct nfs4_setclientid *sc = calldata;
5986
5987 if (task->tk_status == 0)
5988 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5989}
5990
5991static const struct rpc_call_ops nfs4_setclientid_ops = {
5992 .rpc_call_done = nfs4_setclientid_done,
5993};
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
6006 unsigned short port, const struct cred *cred,
6007 struct nfs4_setclientid_res *res)
6008{
6009 nfs4_verifier sc_verifier;
6010 struct nfs4_setclientid setclientid = {
6011 .sc_verifier = &sc_verifier,
6012 .sc_prog = program,
6013 .sc_clnt = clp,
6014 };
6015 struct rpc_message msg = {
6016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6017 .rpc_argp = &setclientid,
6018 .rpc_resp = res,
6019 .rpc_cred = cred,
6020 };
6021 struct rpc_task *task;
6022 struct rpc_task_setup task_setup_data = {
6023 .rpc_client = clp->cl_rpcclient,
6024 .rpc_message = &msg,
6025 .callback_ops = &nfs4_setclientid_ops,
6026 .callback_data = &setclientid,
6027 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
6028 };
6029 int status;
6030
6031
6032 nfs4_init_boot_verifier(clp, &sc_verifier);
6033
6034 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6035 status = nfs4_init_uniform_client_string(clp);
6036 else
6037 status = nfs4_init_nonuniform_client_string(clp);
6038
6039 if (status)
6040 goto out;
6041
6042
6043 setclientid.sc_netid_len =
6044 nfs4_init_callback_netid(clp,
6045 setclientid.sc_netid,
6046 sizeof(setclientid.sc_netid));
6047 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
6048 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
6049 clp->cl_ipaddr, port >> 8, port & 255);
6050
6051 dprintk("NFS call setclientid auth=%s, '%s'\n",
6052 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6053 clp->cl_owner_id);
6054 task = rpc_run_task(&task_setup_data);
6055 if (IS_ERR(task)) {
6056 status = PTR_ERR(task);
6057 goto out;
6058 }
6059 status = task->tk_status;
6060 if (setclientid.sc_cred) {
6061 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6062 put_rpccred(setclientid.sc_cred);
6063 }
6064 rpc_put_task(task);
6065out:
6066 trace_nfs4_setclientid(clp, status);
6067 dprintk("NFS reply setclientid: %d\n", status);
6068 return status;
6069}
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
6080 struct nfs4_setclientid_res *arg,
6081 const struct cred *cred)
6082{
6083 struct rpc_message msg = {
6084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
6085 .rpc_argp = arg,
6086 .rpc_cred = cred,
6087 };
6088 int status;
6089
6090 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6091 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6092 clp->cl_clientid);
6093 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6094 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
6095 trace_nfs4_setclientid_confirm(clp, status);
6096 dprintk("NFS reply setclientid_confirm: %d\n", status);
6097 return status;
6098}
6099
6100struct nfs4_delegreturndata {
6101 struct nfs4_delegreturnargs args;
6102 struct nfs4_delegreturnres res;
6103 struct nfs_fh fh;
6104 nfs4_stateid stateid;
6105 unsigned long timestamp;
6106 struct {
6107 struct nfs4_layoutreturn_args arg;
6108 struct nfs4_layoutreturn_res res;
6109 struct nfs4_xdr_opaque_data ld_private;
6110 u32 roc_barrier;
6111 bool roc;
6112 } lr;
6113 struct nfs_fattr fattr;
6114 int rpc_status;
6115 struct inode *inode;
6116};
6117
6118static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6119{
6120 struct nfs4_delegreturndata *data = calldata;
6121 struct nfs4_exception exception = {
6122 .inode = data->inode,
6123 .stateid = &data->stateid,
6124 };
6125
6126 if (!nfs4_sequence_done(task, &data->res.seq_res))
6127 return;
6128
6129 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
6130
6131
6132 if (data->args.lr_args && task->tk_status != 0) {
6133 switch(data->res.lr_ret) {
6134 default:
6135 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6136 break;
6137 case 0:
6138 data->args.lr_args = NULL;
6139 data->res.lr_res = NULL;
6140 break;
6141 case -NFS4ERR_OLD_STATEID:
6142 if (nfs4_layoutreturn_refresh_stateid(&data->args.lr_args->stateid,
6143 &data->args.lr_args->range,
6144 data->inode))
6145 goto lr_restart;
6146
6147 case -NFS4ERR_ADMIN_REVOKED:
6148 case -NFS4ERR_DELEG_REVOKED:
6149 case -NFS4ERR_EXPIRED:
6150 case -NFS4ERR_BAD_STATEID:
6151 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
6152 case -NFS4ERR_WRONG_CRED:
6153 data->args.lr_args = NULL;
6154 data->res.lr_res = NULL;
6155 goto lr_restart;
6156 }
6157 }
6158
6159 switch (task->tk_status) {
6160 case 0:
6161 renew_lease(data->res.server, data->timestamp);
6162 break;
6163 case -NFS4ERR_ADMIN_REVOKED:
6164 case -NFS4ERR_DELEG_REVOKED:
6165 case -NFS4ERR_EXPIRED:
6166 nfs4_free_revoked_stateid(data->res.server,
6167 data->args.stateid,
6168 task->tk_msg.rpc_cred);
6169
6170 case -NFS4ERR_BAD_STATEID:
6171 case -NFS4ERR_STALE_STATEID:
6172 task->tk_status = 0;
6173 break;
6174 case -NFS4ERR_OLD_STATEID:
6175 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6176 goto out_restart;
6177 task->tk_status = 0;
6178 break;
6179 case -NFS4ERR_ACCESS:
6180 if (data->args.bitmask) {
6181 data->args.bitmask = NULL;
6182 data->res.fattr = NULL;
6183 goto out_restart;
6184 }
6185
6186 default:
6187 task->tk_status = nfs4_async_handle_exception(task,
6188 data->res.server, task->tk_status,
6189 &exception);
6190 if (exception.retry)
6191 goto out_restart;
6192 }
6193 data->rpc_status = task->tk_status;
6194 return;
6195lr_restart:
6196 data->res.lr_ret = 0;
6197out_restart:
6198 task->tk_status = 0;
6199 rpc_restart_call_prepare(task);
6200}
6201
6202static void nfs4_delegreturn_release(void *calldata)
6203{
6204 struct nfs4_delegreturndata *data = calldata;
6205 struct inode *inode = data->inode;
6206
6207 if (inode) {
6208 if (data->lr.roc)
6209 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6210 data->res.lr_ret);
6211 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
6212 nfs_iput_and_deactive(inode);
6213 }
6214 kfree(calldata);
6215}
6216
6217static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6218{
6219 struct nfs4_delegreturndata *d_data;
6220 struct pnfs_layout_hdr *lo;
6221
6222 d_data = (struct nfs4_delegreturndata *)data;
6223
6224 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
6225 return;
6226
6227 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6228 if (lo && !pnfs_layout_is_valid(lo)) {
6229 d_data->args.lr_args = NULL;
6230 d_data->res.lr_res = NULL;
6231 }
6232
6233 nfs4_setup_sequence(d_data->res.server->nfs_client,
6234 &d_data->args.seq_args,
6235 &d_data->res.seq_res,
6236 task);
6237}
6238
6239static const struct rpc_call_ops nfs4_delegreturn_ops = {
6240 .rpc_call_prepare = nfs4_delegreturn_prepare,
6241 .rpc_call_done = nfs4_delegreturn_done,
6242 .rpc_release = nfs4_delegreturn_release,
6243};
6244
6245static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6246{
6247 struct nfs4_delegreturndata *data;
6248 struct nfs_server *server = NFS_SERVER(inode);
6249 struct rpc_task *task;
6250 struct rpc_message msg = {
6251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6252 .rpc_cred = cred,
6253 };
6254 struct rpc_task_setup task_setup_data = {
6255 .rpc_client = server->client,
6256 .rpc_message = &msg,
6257 .callback_ops = &nfs4_delegreturn_ops,
6258 .flags = RPC_TASK_ASYNC,
6259 };
6260 int status = 0;
6261
6262 data = kzalloc(sizeof(*data), GFP_NOFS);
6263 if (data == NULL)
6264 return -ENOMEM;
6265 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
6266
6267 nfs4_state_protect(server->nfs_client,
6268 NFS_SP4_MACH_CRED_CLEANUP,
6269 &task_setup_data.rpc_client, &msg);
6270
6271 data->args.fhandle = &data->fh;
6272 data->args.stateid = &data->stateid;
6273 data->args.bitmask = server->cache_consistency_bitmask;
6274 nfs_copy_fh(&data->fh, NFS_FH(inode));
6275 nfs4_stateid_copy(&data->stateid, stateid);
6276 data->res.fattr = &data->fattr;
6277 data->res.server = server;
6278 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6279 data->lr.arg.ld_private = &data->lr.ld_private;
6280 nfs_fattr_init(data->res.fattr);
6281 data->timestamp = jiffies;
6282 data->rpc_status = 0;
6283 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
6284 data->inode = nfs_igrab_and_active(inode);
6285 if (data->inode) {
6286 if (data->lr.roc) {
6287 data->args.lr_args = &data->lr.arg;
6288 data->res.lr_res = &data->lr.res;
6289 }
6290 } else if (data->lr.roc) {
6291 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6292 data->lr.roc = false;
6293 }
6294
6295 task_setup_data.callback_data = data;
6296 msg.rpc_argp = &data->args;
6297 msg.rpc_resp = &data->res;
6298 task = rpc_run_task(&task_setup_data);
6299 if (IS_ERR(task))
6300 return PTR_ERR(task);
6301 if (!issync)
6302 goto out;
6303 status = rpc_wait_for_completion_task(task);
6304 if (status != 0)
6305 goto out;
6306 status = data->rpc_status;
6307out:
6308 rpc_put_task(task);
6309 return status;
6310}
6311
6312int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6313{
6314 struct nfs_server *server = NFS_SERVER(inode);
6315 struct nfs4_exception exception = { };
6316 int err;
6317 do {
6318 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
6319 trace_nfs4_delegreturn(inode, stateid, err);
6320 switch (err) {
6321 case -NFS4ERR_STALE_STATEID:
6322 case -NFS4ERR_EXPIRED:
6323 case 0:
6324 return 0;
6325 }
6326 err = nfs4_handle_exception(server, err, &exception);
6327 } while (exception.retry);
6328 return err;
6329}
6330
6331static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6332{
6333 struct inode *inode = state->inode;
6334 struct nfs_server *server = NFS_SERVER(inode);
6335 struct nfs_client *clp = server->nfs_client;
6336 struct nfs_lockt_args arg = {
6337 .fh = NFS_FH(inode),
6338 .fl = request,
6339 };
6340 struct nfs_lockt_res res = {
6341 .denied = request,
6342 };
6343 struct rpc_message msg = {
6344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
6345 .rpc_argp = &arg,
6346 .rpc_resp = &res,
6347 .rpc_cred = state->owner->so_cred,
6348 };
6349 struct nfs4_lock_state *lsp;
6350 int status;
6351
6352 arg.lock_owner.clientid = clp->cl_clientid;
6353 status = nfs4_set_lock_state(state, request);
6354 if (status != 0)
6355 goto out;
6356 lsp = request->fl_u.nfs4_fl.owner;
6357 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6358 arg.lock_owner.s_dev = server->s_dev;
6359 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6360 switch (status) {
6361 case 0:
6362 request->fl_type = F_UNLCK;
6363 break;
6364 case -NFS4ERR_DENIED:
6365 status = 0;
6366 }
6367 request->fl_ops->fl_release_private(request);
6368 request->fl_ops = NULL;
6369out:
6370 return status;
6371}
6372
6373static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6374{
6375 struct nfs4_exception exception = {
6376 .interruptible = true,
6377 };
6378 int err;
6379
6380 do {
6381 err = _nfs4_proc_getlk(state, cmd, request);
6382 trace_nfs4_get_lock(request, state, cmd, err);
6383 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6384 &exception);
6385 } while (exception.retry);
6386 return err;
6387}
6388
6389struct nfs4_unlockdata {
6390 struct nfs_locku_args arg;
6391 struct nfs_locku_res res;
6392 struct nfs4_lock_state *lsp;
6393 struct nfs_open_context *ctx;
6394 struct nfs_lock_context *l_ctx;
6395 struct file_lock fl;
6396 struct nfs_server *server;
6397 unsigned long timestamp;
6398};
6399
6400static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6401 struct nfs_open_context *ctx,
6402 struct nfs4_lock_state *lsp,
6403 struct nfs_seqid *seqid)
6404{
6405 struct nfs4_unlockdata *p;
6406 struct inode *inode = lsp->ls_state->inode;
6407
6408 p = kzalloc(sizeof(*p), GFP_NOFS);
6409 if (p == NULL)
6410 return NULL;
6411 p->arg.fh = NFS_FH(inode);
6412 p->arg.fl = &p->fl;
6413 p->arg.seqid = seqid;
6414 p->res.seqid = seqid;
6415 p->lsp = lsp;
6416
6417 p->ctx = get_nfs_open_context(ctx);
6418 p->l_ctx = nfs_get_lock_context(ctx);
6419 locks_init_lock(&p->fl);
6420 locks_copy_lock(&p->fl, fl);
6421 p->server = NFS_SERVER(inode);
6422 return p;
6423}
6424
6425static void nfs4_locku_release_calldata(void *data)
6426{
6427 struct nfs4_unlockdata *calldata = data;
6428 nfs_free_seqid(calldata->arg.seqid);
6429 nfs4_put_lock_state(calldata->lsp);
6430 nfs_put_lock_context(calldata->l_ctx);
6431 put_nfs_open_context(calldata->ctx);
6432 kfree(calldata);
6433}
6434
6435static void nfs4_locku_done(struct rpc_task *task, void *data)
6436{
6437 struct nfs4_unlockdata *calldata = data;
6438 struct nfs4_exception exception = {
6439 .inode = calldata->lsp->ls_state->inode,
6440 .stateid = &calldata->arg.stateid,
6441 };
6442
6443 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6444 return;
6445 switch (task->tk_status) {
6446 case 0:
6447 renew_lease(calldata->server, calldata->timestamp);
6448 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6449 if (nfs4_update_lock_stateid(calldata->lsp,
6450 &calldata->res.stateid))
6451 break;
6452
6453 case -NFS4ERR_ADMIN_REVOKED:
6454 case -NFS4ERR_EXPIRED:
6455 nfs4_free_revoked_stateid(calldata->server,
6456 &calldata->arg.stateid,
6457 task->tk_msg.rpc_cred);
6458
6459 case -NFS4ERR_BAD_STATEID:
6460 case -NFS4ERR_OLD_STATEID:
6461 case -NFS4ERR_STALE_STATEID:
6462 if (!nfs4_stateid_match(&calldata->arg.stateid,
6463 &calldata->lsp->ls_stateid))
6464 rpc_restart_call_prepare(task);
6465 break;
6466 default:
6467 task->tk_status = nfs4_async_handle_exception(task,
6468 calldata->server, task->tk_status,
6469 &exception);
6470 if (exception.retry)
6471 rpc_restart_call_prepare(task);
6472 }
6473 nfs_release_seqid(calldata->arg.seqid);
6474}
6475
6476static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6477{
6478 struct nfs4_unlockdata *calldata = data;
6479
6480 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6481 nfs_async_iocounter_wait(task, calldata->l_ctx))
6482 return;
6483
6484 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6485 goto out_wait;
6486 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
6487 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6488
6489 goto out_no_action;
6490 }
6491 calldata->timestamp = jiffies;
6492 if (nfs4_setup_sequence(calldata->server->nfs_client,
6493 &calldata->arg.seq_args,
6494 &calldata->res.seq_res,
6495 task) != 0)
6496 nfs_release_seqid(calldata->arg.seqid);
6497 return;
6498out_no_action:
6499 task->tk_action = NULL;
6500out_wait:
6501 nfs4_sequence_done(task, &calldata->res.seq_res);
6502}
6503
6504static const struct rpc_call_ops nfs4_locku_ops = {
6505 .rpc_call_prepare = nfs4_locku_prepare,
6506 .rpc_call_done = nfs4_locku_done,
6507 .rpc_release = nfs4_locku_release_calldata,
6508};
6509
6510static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6511 struct nfs_open_context *ctx,
6512 struct nfs4_lock_state *lsp,
6513 struct nfs_seqid *seqid)
6514{
6515 struct nfs4_unlockdata *data;
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6518 .rpc_cred = ctx->cred,
6519 };
6520 struct rpc_task_setup task_setup_data = {
6521 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6522 .rpc_message = &msg,
6523 .callback_ops = &nfs4_locku_ops,
6524 .workqueue = nfsiod_workqueue,
6525 .flags = RPC_TASK_ASYNC,
6526 };
6527
6528 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6529 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6530
6531
6532
6533
6534 fl->fl_type = F_UNLCK;
6535 if (fl->fl_flags & FL_CLOSE)
6536 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
6537
6538 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6539 if (data == NULL) {
6540 nfs_free_seqid(seqid);
6541 return ERR_PTR(-ENOMEM);
6542 }
6543
6544 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
6545 msg.rpc_argp = &data->arg;
6546 msg.rpc_resp = &data->res;
6547 task_setup_data.callback_data = data;
6548 return rpc_run_task(&task_setup_data);
6549}
6550
6551static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6552{
6553 struct inode *inode = state->inode;
6554 struct nfs4_state_owner *sp = state->owner;
6555 struct nfs_inode *nfsi = NFS_I(inode);
6556 struct nfs_seqid *seqid;
6557 struct nfs4_lock_state *lsp;
6558 struct rpc_task *task;
6559 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6560 int status = 0;
6561 unsigned char fl_flags = request->fl_flags;
6562
6563 status = nfs4_set_lock_state(state, request);
6564
6565 request->fl_flags |= FL_EXISTS;
6566
6567 mutex_lock(&sp->so_delegreturn_mutex);
6568
6569 down_read(&nfsi->rwsem);
6570 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6571 up_read(&nfsi->rwsem);
6572 mutex_unlock(&sp->so_delegreturn_mutex);
6573 goto out;
6574 }
6575 up_read(&nfsi->rwsem);
6576 mutex_unlock(&sp->so_delegreturn_mutex);
6577 if (status != 0)
6578 goto out;
6579
6580 lsp = request->fl_u.nfs4_fl.owner;
6581 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6582 goto out;
6583 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6584 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6585 status = -ENOMEM;
6586 if (IS_ERR(seqid))
6587 goto out;
6588 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6589 status = PTR_ERR(task);
6590 if (IS_ERR(task))
6591 goto out;
6592 status = rpc_wait_for_completion_task(task);
6593 rpc_put_task(task);
6594out:
6595 request->fl_flags = fl_flags;
6596 trace_nfs4_unlock(request, state, F_SETLK, status);
6597 return status;
6598}
6599
6600struct nfs4_lockdata {
6601 struct nfs_lock_args arg;
6602 struct nfs_lock_res res;
6603 struct nfs4_lock_state *lsp;
6604 struct nfs_open_context *ctx;
6605 struct file_lock fl;
6606 unsigned long timestamp;
6607 int rpc_status;
6608 int cancelled;
6609 struct nfs_server *server;
6610};
6611
6612static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6613 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6614 gfp_t gfp_mask)
6615{
6616 struct nfs4_lockdata *p;
6617 struct inode *inode = lsp->ls_state->inode;
6618 struct nfs_server *server = NFS_SERVER(inode);
6619 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6620
6621 p = kzalloc(sizeof(*p), gfp_mask);
6622 if (p == NULL)
6623 return NULL;
6624
6625 p->arg.fh = NFS_FH(inode);
6626 p->arg.fl = &p->fl;
6627 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6628 if (IS_ERR(p->arg.open_seqid))
6629 goto out_free;
6630 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6631 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6632 if (IS_ERR(p->arg.lock_seqid))
6633 goto out_free_seqid;
6634 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6635 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6636 p->arg.lock_owner.s_dev = server->s_dev;
6637 p->res.lock_seqid = p->arg.lock_seqid;
6638 p->lsp = lsp;
6639 p->server = server;
6640 p->ctx = get_nfs_open_context(ctx);
6641 locks_init_lock(&p->fl);
6642 locks_copy_lock(&p->fl, fl);
6643 return p;
6644out_free_seqid:
6645 nfs_free_seqid(p->arg.open_seqid);
6646out_free:
6647 kfree(p);
6648 return NULL;
6649}
6650
6651static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6652{
6653 struct nfs4_lockdata *data = calldata;
6654 struct nfs4_state *state = data->lsp->ls_state;
6655
6656 dprintk("%s: begin!\n", __func__);
6657 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6658 goto out_wait;
6659
6660 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6661 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6662 goto out_release_lock_seqid;
6663 }
6664 nfs4_stateid_copy(&data->arg.open_stateid,
6665 &state->open_stateid);
6666 data->arg.new_lock_owner = 1;
6667 data->res.open_seqid = data->arg.open_seqid;
6668 } else {
6669 data->arg.new_lock_owner = 0;
6670 nfs4_stateid_copy(&data->arg.lock_stateid,
6671 &data->lsp->ls_stateid);
6672 }
6673 if (!nfs4_valid_open_stateid(state)) {
6674 data->rpc_status = -EBADF;
6675 task->tk_action = NULL;
6676 goto out_release_open_seqid;
6677 }
6678 data->timestamp = jiffies;
6679 if (nfs4_setup_sequence(data->server->nfs_client,
6680 &data->arg.seq_args,
6681 &data->res.seq_res,
6682 task) == 0)
6683 return;
6684out_release_open_seqid:
6685 nfs_release_seqid(data->arg.open_seqid);
6686out_release_lock_seqid:
6687 nfs_release_seqid(data->arg.lock_seqid);
6688out_wait:
6689 nfs4_sequence_done(task, &data->res.seq_res);
6690 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6691}
6692
6693static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6694{
6695 struct nfs4_lockdata *data = calldata;
6696 struct nfs4_lock_state *lsp = data->lsp;
6697
6698 dprintk("%s: begin!\n", __func__);
6699
6700 if (!nfs4_sequence_done(task, &data->res.seq_res))
6701 return;
6702
6703 data->rpc_status = task->tk_status;
6704 switch (task->tk_status) {
6705 case 0:
6706 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6707 data->timestamp);
6708 if (data->arg.new_lock && !data->cancelled) {
6709 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6710 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6711 goto out_restart;
6712 }
6713 if (data->arg.new_lock_owner != 0) {
6714 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6715 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6716 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6717 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6718 goto out_restart;
6719 break;
6720 case -NFS4ERR_BAD_STATEID:
6721 case -NFS4ERR_OLD_STATEID:
6722 case -NFS4ERR_STALE_STATEID:
6723 case -NFS4ERR_EXPIRED:
6724 if (data->arg.new_lock_owner != 0) {
6725 if (!nfs4_stateid_match(&data->arg.open_stateid,
6726 &lsp->ls_state->open_stateid))
6727 goto out_restart;
6728 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6729 &lsp->ls_stateid))
6730 goto out_restart;
6731 }
6732out_done:
6733 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6734 return;
6735out_restart:
6736 if (!data->cancelled)
6737 rpc_restart_call_prepare(task);
6738 goto out_done;
6739}
6740
6741static void nfs4_lock_release(void *calldata)
6742{
6743 struct nfs4_lockdata *data = calldata;
6744
6745 dprintk("%s: begin!\n", __func__);
6746 nfs_free_seqid(data->arg.open_seqid);
6747 if (data->cancelled && data->rpc_status == 0) {
6748 struct rpc_task *task;
6749 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6750 data->arg.lock_seqid);
6751 if (!IS_ERR(task))
6752 rpc_put_task_async(task);
6753 dprintk("%s: cancelling lock!\n", __func__);
6754 } else
6755 nfs_free_seqid(data->arg.lock_seqid);
6756 nfs4_put_lock_state(data->lsp);
6757 put_nfs_open_context(data->ctx);
6758 kfree(data);
6759 dprintk("%s: done!\n", __func__);
6760}
6761
6762static const struct rpc_call_ops nfs4_lock_ops = {
6763 .rpc_call_prepare = nfs4_lock_prepare,
6764 .rpc_call_done = nfs4_lock_done,
6765 .rpc_release = nfs4_lock_release,
6766};
6767
6768static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6769{
6770 switch (error) {
6771 case -NFS4ERR_ADMIN_REVOKED:
6772 case -NFS4ERR_EXPIRED:
6773 case -NFS4ERR_BAD_STATEID:
6774 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6775 if (new_lock_owner != 0 ||
6776 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6777 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6778 break;
6779 case -NFS4ERR_STALE_STATEID:
6780 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6781 nfs4_schedule_lease_recovery(server->nfs_client);
6782 };
6783}
6784
6785static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6786{
6787 struct nfs4_lockdata *data;
6788 struct rpc_task *task;
6789 struct rpc_message msg = {
6790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6791 .rpc_cred = state->owner->so_cred,
6792 };
6793 struct rpc_task_setup task_setup_data = {
6794 .rpc_client = NFS_CLIENT(state->inode),
6795 .rpc_message = &msg,
6796 .callback_ops = &nfs4_lock_ops,
6797 .workqueue = nfsiod_workqueue,
6798 .flags = RPC_TASK_ASYNC,
6799 };
6800 int ret;
6801
6802 dprintk("%s: begin!\n", __func__);
6803 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6804 fl->fl_u.nfs4_fl.owner,
6805 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6806 if (data == NULL)
6807 return -ENOMEM;
6808 if (IS_SETLKW(cmd))
6809 data->arg.block = 1;
6810 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
6811 recovery_type > NFS_LOCK_NEW);
6812 msg.rpc_argp = &data->arg;
6813 msg.rpc_resp = &data->res;
6814 task_setup_data.callback_data = data;
6815 if (recovery_type > NFS_LOCK_NEW) {
6816 if (recovery_type == NFS_LOCK_RECLAIM)
6817 data->arg.reclaim = NFS_LOCK_RECLAIM;
6818 } else
6819 data->arg.new_lock = 1;
6820 task = rpc_run_task(&task_setup_data);
6821 if (IS_ERR(task))
6822 return PTR_ERR(task);
6823 ret = rpc_wait_for_completion_task(task);
6824 if (ret == 0) {
6825 ret = data->rpc_status;
6826 if (ret)
6827 nfs4_handle_setlk_error(data->server, data->lsp,
6828 data->arg.new_lock_owner, ret);
6829 } else
6830 data->cancelled = true;
6831 rpc_put_task(task);
6832 dprintk("%s: done, ret = %d!\n", __func__, ret);
6833 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6834 return ret;
6835}
6836
6837static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6838{
6839 struct nfs_server *server = NFS_SERVER(state->inode);
6840 struct nfs4_exception exception = {
6841 .inode = state->inode,
6842 };
6843 int err;
6844
6845 do {
6846
6847 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6848 return 0;
6849 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6850 if (err != -NFS4ERR_DELAY)
6851 break;
6852 nfs4_handle_exception(server, err, &exception);
6853 } while (exception.retry);
6854 return err;
6855}
6856
6857static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6858{
6859 struct nfs_server *server = NFS_SERVER(state->inode);
6860 struct nfs4_exception exception = {
6861 .inode = state->inode,
6862 };
6863 int err;
6864
6865 err = nfs4_set_lock_state(state, request);
6866 if (err != 0)
6867 return err;
6868 if (!recover_lost_locks) {
6869 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6870 return 0;
6871 }
6872 do {
6873 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6874 return 0;
6875 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6876 switch (err) {
6877 default:
6878 goto out;
6879 case -NFS4ERR_GRACE:
6880 case -NFS4ERR_DELAY:
6881 nfs4_handle_exception(server, err, &exception);
6882 err = 0;
6883 }
6884 } while (exception.retry);
6885out:
6886 return err;
6887}
6888
6889#if defined(CONFIG_NFS_V4_1)
6890static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6891{
6892 struct nfs4_lock_state *lsp;
6893 int status;
6894
6895 status = nfs4_set_lock_state(state, request);
6896 if (status != 0)
6897 return status;
6898 lsp = request->fl_u.nfs4_fl.owner;
6899 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6900 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6901 return 0;
6902 return nfs4_lock_expired(state, request);
6903}
6904#endif
6905
6906static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6907{
6908 struct nfs_inode *nfsi = NFS_I(state->inode);
6909 struct nfs4_state_owner *sp = state->owner;
6910 unsigned char fl_flags = request->fl_flags;
6911 int status;
6912
6913 request->fl_flags |= FL_ACCESS;
6914 status = locks_lock_inode_wait(state->inode, request);
6915 if (status < 0)
6916 goto out;
6917 mutex_lock(&sp->so_delegreturn_mutex);
6918 down_read(&nfsi->rwsem);
6919 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6920
6921
6922 request->fl_flags = fl_flags & ~FL_SLEEP;
6923 status = locks_lock_inode_wait(state->inode, request);
6924 up_read(&nfsi->rwsem);
6925 mutex_unlock(&sp->so_delegreturn_mutex);
6926 goto out;
6927 }
6928 up_read(&nfsi->rwsem);
6929 mutex_unlock(&sp->so_delegreturn_mutex);
6930 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6931out:
6932 request->fl_flags = fl_flags;
6933 return status;
6934}
6935
6936static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6937{
6938 struct nfs4_exception exception = {
6939 .state = state,
6940 .inode = state->inode,
6941 .interruptible = true,
6942 };
6943 int err;
6944
6945 do {
6946 err = _nfs4_proc_setlk(state, cmd, request);
6947 if (err == -NFS4ERR_DENIED)
6948 err = -EAGAIN;
6949 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6950 err, &exception);
6951 } while (exception.retry);
6952 return err;
6953}
6954
6955#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6956#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6957
6958static int
6959nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6960 struct file_lock *request)
6961{
6962 int status = -ERESTARTSYS;
6963 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6964
6965 while(!signalled()) {
6966 status = nfs4_proc_setlk(state, cmd, request);
6967 if ((status != -EAGAIN) || IS_SETLK(cmd))
6968 break;
6969 freezable_schedule_timeout_interruptible(timeout);
6970 timeout *= 2;
6971 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6972 status = -ERESTARTSYS;
6973 }
6974 return status;
6975}
6976
6977#ifdef CONFIG_NFS_V4_1
6978struct nfs4_lock_waiter {
6979 struct task_struct *task;
6980 struct inode *inode;
6981 struct nfs_lowner *owner;
6982};
6983
6984static int
6985nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
6986{
6987 int ret;
6988 struct nfs4_lock_waiter *waiter = wait->private;
6989
6990
6991 if (key) {
6992 struct cb_notify_lock_args *cbnl = key;
6993 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6994 *wowner = waiter->owner;
6995
6996
6997 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
6998 return 0;
6999
7000
7001 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7002 return 0;
7003 }
7004
7005
7006 wait->private = waiter->task;
7007 ret = woken_wake_function(wait, mode, flags, key);
7008 if (ret)
7009 list_del_init(&wait->entry);
7010 wait->private = waiter;
7011 return ret;
7012}
7013
7014static int
7015nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7016{
7017 int status = -ERESTARTSYS;
7018 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7019 struct nfs_server *server = NFS_SERVER(state->inode);
7020 struct nfs_client *clp = server->nfs_client;
7021 wait_queue_head_t *q = &clp->cl_lock_waitq;
7022 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
7023 .id = lsp->ls_seqid.owner_id,
7024 .s_dev = server->s_dev };
7025 struct nfs4_lock_waiter waiter = { .task = current,
7026 .inode = state->inode,
7027 .owner = &owner};
7028 wait_queue_entry_t wait;
7029
7030
7031 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7032 return nfs4_retry_setlk_simple(state, cmd, request);
7033
7034 init_wait(&wait);
7035 wait.private = &waiter;
7036 wait.func = nfs4_wake_lock_waiter;
7037
7038 while(!signalled()) {
7039 add_wait_queue(q, &wait);
7040 status = nfs4_proc_setlk(state, cmd, request);
7041 if ((status != -EAGAIN) || IS_SETLK(cmd)) {
7042 finish_wait(q, &wait);
7043 break;
7044 }
7045
7046 status = -ERESTARTSYS;
7047 freezer_do_not_count();
7048 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
7049 freezer_count();
7050 finish_wait(q, &wait);
7051 }
7052
7053 return status;
7054}
7055#else
7056static inline int
7057nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7058{
7059 return nfs4_retry_setlk_simple(state, cmd, request);
7060}
7061#endif
7062
7063static int
7064nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7065{
7066 struct nfs_open_context *ctx;
7067 struct nfs4_state *state;
7068 int status;
7069
7070
7071 ctx = nfs_file_open_context(filp);
7072 state = ctx->state;
7073
7074 if (IS_GETLK(cmd)) {
7075 if (state != NULL)
7076 return nfs4_proc_getlk(state, F_GETLK, request);
7077 return 0;
7078 }
7079
7080 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7081 return -EINVAL;
7082
7083 if (request->fl_type == F_UNLCK) {
7084 if (state != NULL)
7085 return nfs4_proc_unlck(state, cmd, request);
7086 return 0;
7087 }
7088
7089 if (state == NULL)
7090 return -ENOLCK;
7091
7092 if ((request->fl_flags & FL_POSIX) &&
7093 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7094 return -ENOLCK;
7095
7096
7097
7098
7099
7100 switch (request->fl_type) {
7101 case F_RDLCK:
7102 if (!(filp->f_mode & FMODE_READ))
7103 return -EBADF;
7104 break;
7105 case F_WRLCK:
7106 if (!(filp->f_mode & FMODE_WRITE))
7107 return -EBADF;
7108 }
7109
7110 status = nfs4_set_lock_state(state, request);
7111 if (status != 0)
7112 return status;
7113
7114 return nfs4_retry_setlk(state, cmd, request);
7115}
7116
7117int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
7118{
7119 struct nfs_server *server = NFS_SERVER(state->inode);
7120 int err;
7121
7122 err = nfs4_set_lock_state(state, fl);
7123 if (err != 0)
7124 return err;
7125 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7126 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
7127}
7128
7129struct nfs_release_lockowner_data {
7130 struct nfs4_lock_state *lsp;
7131 struct nfs_server *server;
7132 struct nfs_release_lockowner_args args;
7133 struct nfs_release_lockowner_res res;
7134 unsigned long timestamp;
7135};
7136
7137static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7138{
7139 struct nfs_release_lockowner_data *data = calldata;
7140 struct nfs_server *server = data->server;
7141 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7142 &data->res.seq_res, task);
7143 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7144 data->timestamp = jiffies;
7145}
7146
7147static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7148{
7149 struct nfs_release_lockowner_data *data = calldata;
7150 struct nfs_server *server = data->server;
7151
7152 nfs40_sequence_done(task, &data->res.seq_res);
7153
7154 switch (task->tk_status) {
7155 case 0:
7156 renew_lease(server, data->timestamp);
7157 break;
7158 case -NFS4ERR_STALE_CLIENTID:
7159 case -NFS4ERR_EXPIRED:
7160 nfs4_schedule_lease_recovery(server->nfs_client);
7161 break;
7162 case -NFS4ERR_LEASE_MOVED:
7163 case -NFS4ERR_DELAY:
7164 if (nfs4_async_handle_error(task, server,
7165 NULL, NULL) == -EAGAIN)
7166 rpc_restart_call_prepare(task);
7167 }
7168}
7169
7170static void nfs4_release_lockowner_release(void *calldata)
7171{
7172 struct nfs_release_lockowner_data *data = calldata;
7173 nfs4_free_lock_state(data->server, data->lsp);
7174 kfree(calldata);
7175}
7176
7177static const struct rpc_call_ops nfs4_release_lockowner_ops = {
7178 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7179 .rpc_call_done = nfs4_release_lockowner_done,
7180 .rpc_release = nfs4_release_lockowner_release,
7181};
7182
7183static void
7184nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
7185{
7186 struct nfs_release_lockowner_data *data;
7187 struct rpc_message msg = {
7188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7189 };
7190
7191 if (server->nfs_client->cl_mvops->minor_version != 0)
7192 return;
7193
7194 data = kmalloc(sizeof(*data), GFP_NOFS);
7195 if (!data)
7196 return;
7197 data->lsp = lsp;
7198 data->server = server;
7199 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7200 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7201 data->args.lock_owner.s_dev = server->s_dev;
7202
7203 msg.rpc_argp = &data->args;
7204 msg.rpc_resp = &data->res;
7205 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
7206 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
7207}
7208
7209#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7210
7211static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
7212 struct dentry *unused, struct inode *inode,
7213 const char *key, const void *buf,
7214 size_t buflen, int flags)
7215{
7216 return nfs4_proc_set_acl(inode, buf, buflen);
7217}
7218
7219static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
7220 struct dentry *unused, struct inode *inode,
7221 const char *key, void *buf, size_t buflen)
7222{
7223 return nfs4_proc_get_acl(inode, buf, buflen);
7224}
7225
7226static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
7227{
7228 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
7229}
7230
7231#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7232
7233static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
7234 struct dentry *unused, struct inode *inode,
7235 const char *key, const void *buf,
7236 size_t buflen, int flags)
7237{
7238 if (security_ismaclabel(key))
7239 return nfs4_set_security_label(inode, buf, buflen);
7240
7241 return -EOPNOTSUPP;
7242}
7243
7244static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
7245 struct dentry *unused, struct inode *inode,
7246 const char *key, void *buf, size_t buflen)
7247{
7248 if (security_ismaclabel(key))
7249 return nfs4_get_security_label(inode, buf, buflen);
7250 return -EOPNOTSUPP;
7251}
7252
7253static ssize_t
7254nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7255{
7256 int len = 0;
7257
7258 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7259 len = security_inode_listsecurity(inode, list, list_len);
7260 if (list_len && len > list_len)
7261 return -ERANGE;
7262 }
7263 return len;
7264}
7265
7266static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7267 .prefix = XATTR_SECURITY_PREFIX,
7268 .get = nfs4_xattr_get_nfs4_label,
7269 .set = nfs4_xattr_set_nfs4_label,
7270};
7271
7272#else
7273
7274static ssize_t
7275nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7276{
7277 return 0;
7278}
7279
7280#endif
7281
7282
7283
7284
7285static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7286{
7287 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7288 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7289 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
7290 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
7291 return;
7292
7293 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
7294 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
7295 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7296 fattr->nlink = 2;
7297}
7298
7299static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7300 const struct qstr *name,
7301 struct nfs4_fs_locations *fs_locations,
7302 struct page *page)
7303{
7304 struct nfs_server *server = NFS_SERVER(dir);
7305 u32 bitmask[3];
7306 struct nfs4_fs_locations_arg args = {
7307 .dir_fh = NFS_FH(dir),
7308 .name = name,
7309 .page = page,
7310 .bitmask = bitmask,
7311 };
7312 struct nfs4_fs_locations_res res = {
7313 .fs_locations = fs_locations,
7314 };
7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7317 .rpc_argp = &args,
7318 .rpc_resp = &res,
7319 };
7320 int status;
7321
7322 dprintk("%s: start\n", __func__);
7323
7324 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7325 bitmask[1] = nfs4_fattr_bitmap[1];
7326
7327
7328
7329 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
7330 bitmask[0] &= ~FATTR4_WORD0_FILEID;
7331 else
7332 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
7333
7334 nfs_fattr_init(&fs_locations->fattr);
7335 fs_locations->server = server;
7336 fs_locations->nlocations = 0;
7337 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
7338 dprintk("%s: returned status = %d\n", __func__, status);
7339 return status;
7340}
7341
7342int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7343 const struct qstr *name,
7344 struct nfs4_fs_locations *fs_locations,
7345 struct page *page)
7346{
7347 struct nfs4_exception exception = {
7348 .interruptible = true,
7349 };
7350 int err;
7351 do {
7352 err = _nfs4_proc_fs_locations(client, dir, name,
7353 fs_locations, page);
7354 trace_nfs4_get_fs_locations(dir, name, err);
7355 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7356 &exception);
7357 } while (exception.retry);
7358 return err;
7359}
7360
7361
7362
7363
7364
7365
7366
7367
7368static int _nfs40_proc_get_locations(struct inode *inode,
7369 struct nfs4_fs_locations *locations,
7370 struct page *page, const struct cred *cred)
7371{
7372 struct nfs_server *server = NFS_SERVER(inode);
7373 struct rpc_clnt *clnt = server->client;
7374 u32 bitmask[2] = {
7375 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7376 };
7377 struct nfs4_fs_locations_arg args = {
7378 .clientid = server->nfs_client->cl_clientid,
7379 .fh = NFS_FH(inode),
7380 .page = page,
7381 .bitmask = bitmask,
7382 .migration = 1,
7383 .renew = 1,
7384 };
7385 struct nfs4_fs_locations_res res = {
7386 .fs_locations = locations,
7387 .migration = 1,
7388 .renew = 1,
7389 };
7390 struct rpc_message msg = {
7391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7392 .rpc_argp = &args,
7393 .rpc_resp = &res,
7394 .rpc_cred = cred,
7395 };
7396 unsigned long now = jiffies;
7397 int status;
7398
7399 nfs_fattr_init(&locations->fattr);
7400 locations->server = server;
7401 locations->nlocations = 0;
7402
7403 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7404 status = nfs4_call_sync_sequence(clnt, server, &msg,
7405 &args.seq_args, &res.seq_res);
7406 if (status)
7407 return status;
7408
7409 renew_lease(server, now);
7410 return 0;
7411}
7412
7413#ifdef CONFIG_NFS_V4_1
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425static int _nfs41_proc_get_locations(struct inode *inode,
7426 struct nfs4_fs_locations *locations,
7427 struct page *page, const struct cred *cred)
7428{
7429 struct nfs_server *server = NFS_SERVER(inode);
7430 struct rpc_clnt *clnt = server->client;
7431 u32 bitmask[2] = {
7432 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7433 };
7434 struct nfs4_fs_locations_arg args = {
7435 .fh = NFS_FH(inode),
7436 .page = page,
7437 .bitmask = bitmask,
7438 .migration = 1,
7439 };
7440 struct nfs4_fs_locations_res res = {
7441 .fs_locations = locations,
7442 .migration = 1,
7443 };
7444 struct rpc_message msg = {
7445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7446 .rpc_argp = &args,
7447 .rpc_resp = &res,
7448 .rpc_cred = cred,
7449 };
7450 int status;
7451
7452 nfs_fattr_init(&locations->fattr);
7453 locations->server = server;
7454 locations->nlocations = 0;
7455
7456 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7457 status = nfs4_call_sync_sequence(clnt, server, &msg,
7458 &args.seq_args, &res.seq_res);
7459 if (status == NFS4_OK &&
7460 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7461 status = -NFS4ERR_LEASE_MOVED;
7462 return status;
7463}
7464
7465#endif
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484int nfs4_proc_get_locations(struct inode *inode,
7485 struct nfs4_fs_locations *locations,
7486 struct page *page, const struct cred *cred)
7487{
7488 struct nfs_server *server = NFS_SERVER(inode);
7489 struct nfs_client *clp = server->nfs_client;
7490 const struct nfs4_mig_recovery_ops *ops =
7491 clp->cl_mvops->mig_recovery_ops;
7492 struct nfs4_exception exception = {
7493 .interruptible = true,
7494 };
7495 int status;
7496
7497 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7498 (unsigned long long)server->fsid.major,
7499 (unsigned long long)server->fsid.minor,
7500 clp->cl_hostname);
7501 nfs_display_fhandle(NFS_FH(inode), __func__);
7502
7503 do {
7504 status = ops->get_locations(inode, locations, page, cred);
7505 if (status != -NFS4ERR_DELAY)
7506 break;
7507 nfs4_handle_exception(server, status, &exception);
7508 } while (exception.retry);
7509 return status;
7510}
7511
7512
7513
7514
7515
7516
7517
7518
7519static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
7520{
7521 struct nfs_server *server = NFS_SERVER(inode);
7522 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7523 struct rpc_clnt *clnt = server->client;
7524 struct nfs4_fsid_present_arg args = {
7525 .fh = NFS_FH(inode),
7526 .clientid = clp->cl_clientid,
7527 .renew = 1,
7528 };
7529 struct nfs4_fsid_present_res res = {
7530 .renew = 1,
7531 };
7532 struct rpc_message msg = {
7533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7534 .rpc_argp = &args,
7535 .rpc_resp = &res,
7536 .rpc_cred = cred,
7537 };
7538 unsigned long now = jiffies;
7539 int status;
7540
7541 res.fh = nfs_alloc_fhandle();
7542 if (res.fh == NULL)
7543 return -ENOMEM;
7544
7545 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7546 status = nfs4_call_sync_sequence(clnt, server, &msg,
7547 &args.seq_args, &res.seq_res);
7548 nfs_free_fhandle(res.fh);
7549 if (status)
7550 return status;
7551
7552 do_renew_lease(clp, now);
7553 return 0;
7554}
7555
7556#ifdef CONFIG_NFS_V4_1
7557
7558
7559
7560
7561
7562
7563
7564
7565static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
7566{
7567 struct nfs_server *server = NFS_SERVER(inode);
7568 struct rpc_clnt *clnt = server->client;
7569 struct nfs4_fsid_present_arg args = {
7570 .fh = NFS_FH(inode),
7571 };
7572 struct nfs4_fsid_present_res res = {
7573 };
7574 struct rpc_message msg = {
7575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7576 .rpc_argp = &args,
7577 .rpc_resp = &res,
7578 .rpc_cred = cred,
7579 };
7580 int status;
7581
7582 res.fh = nfs_alloc_fhandle();
7583 if (res.fh == NULL)
7584 return -ENOMEM;
7585
7586 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7587 status = nfs4_call_sync_sequence(clnt, server, &msg,
7588 &args.seq_args, &res.seq_res);
7589 nfs_free_fhandle(res.fh);
7590 if (status == NFS4_OK &&
7591 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7592 status = -NFS4ERR_LEASE_MOVED;
7593 return status;
7594}
7595
7596#endif
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
7613{
7614 struct nfs_server *server = NFS_SERVER(inode);
7615 struct nfs_client *clp = server->nfs_client;
7616 const struct nfs4_mig_recovery_ops *ops =
7617 clp->cl_mvops->mig_recovery_ops;
7618 struct nfs4_exception exception = {
7619 .interruptible = true,
7620 };
7621 int status;
7622
7623 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7624 (unsigned long long)server->fsid.major,
7625 (unsigned long long)server->fsid.minor,
7626 clp->cl_hostname);
7627 nfs_display_fhandle(NFS_FH(inode), __func__);
7628
7629 do {
7630 status = ops->fsid_present(inode, cred);
7631 if (status != -NFS4ERR_DELAY)
7632 break;
7633 nfs4_handle_exception(server, status, &exception);
7634 } while (exception.retry);
7635 return status;
7636}
7637
7638
7639
7640
7641
7642
7643
7644
7645static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7646{
7647 int status;
7648 struct nfs4_secinfo_arg args = {
7649 .dir_fh = NFS_FH(dir),
7650 .name = name,
7651 };
7652 struct nfs4_secinfo_res res = {
7653 .flavors = flavors,
7654 };
7655 struct rpc_message msg = {
7656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7657 .rpc_argp = &args,
7658 .rpc_resp = &res,
7659 };
7660 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7661 const struct cred *cred = NULL;
7662
7663 if (use_integrity) {
7664 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7665 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7666 msg.rpc_cred = cred;
7667 }
7668
7669 dprintk("NFS call secinfo %s\n", name->name);
7670
7671 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7672 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7673
7674 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7675 &res.seq_res, RPC_TASK_NO_ROUND_ROBIN);
7676 dprintk("NFS reply secinfo: %d\n", status);
7677
7678 put_cred(cred);
7679
7680 return status;
7681}
7682
7683int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7684 struct nfs4_secinfo_flavors *flavors)
7685{
7686 struct nfs4_exception exception = {
7687 .interruptible = true,
7688 };
7689 int err;
7690 do {
7691 err = -NFS4ERR_WRONGSEC;
7692
7693
7694 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7695 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7696
7697
7698
7699
7700
7701
7702
7703 if (err == -NFS4ERR_WRONGSEC)
7704 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7705
7706 trace_nfs4_secinfo(dir, name, err);
7707 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7708 &exception);
7709 } while (exception.retry);
7710 return err;
7711}
7712
7713#ifdef CONFIG_NFS_V4_1
7714
7715
7716
7717
7718
7719static int nfs4_check_cl_exchange_flags(u32 flags)
7720{
7721 if (flags & ~EXCHGID4_FLAG_MASK_R)
7722 goto out_inval;
7723 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7724 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7725 goto out_inval;
7726 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7727 goto out_inval;
7728 return NFS_OK;
7729out_inval:
7730 return -NFS4ERR_INVAL;
7731}
7732
7733static bool
7734nfs41_same_server_scope(struct nfs41_server_scope *a,
7735 struct nfs41_server_scope *b)
7736{
7737 if (a->server_scope_sz != b->server_scope_sz)
7738 return false;
7739 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7740}
7741
7742static void
7743nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7744{
7745}
7746
7747static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7748 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7749};
7750
7751
7752
7753
7754
7755
7756
7757static
7758int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7759 struct rpc_xprt *xprt,
7760 struct nfs_client *clp,
7761 const struct cred *cred)
7762{
7763 int status;
7764 struct nfs41_bind_conn_to_session_args args = {
7765 .client = clp,
7766 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7767 };
7768 struct nfs41_bind_conn_to_session_res res;
7769 struct rpc_message msg = {
7770 .rpc_proc =
7771 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7772 .rpc_argp = &args,
7773 .rpc_resp = &res,
7774 .rpc_cred = cred,
7775 };
7776 struct rpc_task_setup task_setup_data = {
7777 .rpc_client = clnt,
7778 .rpc_xprt = xprt,
7779 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7780 .rpc_message = &msg,
7781 .flags = RPC_TASK_TIMEOUT,
7782 };
7783 struct rpc_task *task;
7784
7785 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7786 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7787 args.dir = NFS4_CDFC4_FORE;
7788
7789
7790 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7791 args.dir = NFS4_CDFC4_FORE;
7792
7793 task = rpc_run_task(&task_setup_data);
7794 if (!IS_ERR(task)) {
7795 status = task->tk_status;
7796 rpc_put_task(task);
7797 } else
7798 status = PTR_ERR(task);
7799 trace_nfs4_bind_conn_to_session(clp, status);
7800 if (status == 0) {
7801 if (memcmp(res.sessionid.data,
7802 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7803 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7804 return -EIO;
7805 }
7806 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7807 dprintk("NFS: %s: Unexpected direction from server\n",
7808 __func__);
7809 return -EIO;
7810 }
7811 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7812 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7813 __func__);
7814 return -EIO;
7815 }
7816 }
7817
7818 return status;
7819}
7820
7821struct rpc_bind_conn_calldata {
7822 struct nfs_client *clp;
7823 const struct cred *cred;
7824};
7825
7826static int
7827nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7828 struct rpc_xprt *xprt,
7829 void *calldata)
7830{
7831 struct rpc_bind_conn_calldata *p = calldata;
7832
7833 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7834}
7835
7836int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
7837{
7838 struct rpc_bind_conn_calldata data = {
7839 .clp = clp,
7840 .cred = cred,
7841 };
7842 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7843 nfs4_proc_bind_conn_to_session_callback, &data);
7844}
7845
7846
7847
7848
7849
7850static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7851 .how = SP4_MACH_CRED,
7852 .enforce.u.words = {
7853 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7854 1 << (OP_EXCHANGE_ID - 32) |
7855 1 << (OP_CREATE_SESSION - 32) |
7856 1 << (OP_DESTROY_SESSION - 32) |
7857 1 << (OP_DESTROY_CLIENTID - 32)
7858 },
7859 .allow.u.words = {
7860 [0] = 1 << (OP_CLOSE) |
7861 1 << (OP_OPEN_DOWNGRADE) |
7862 1 << (OP_LOCKU) |
7863 1 << (OP_DELEGRETURN) |
7864 1 << (OP_COMMIT),
7865 [1] = 1 << (OP_SECINFO - 32) |
7866 1 << (OP_SECINFO_NO_NAME - 32) |
7867 1 << (OP_LAYOUTRETURN - 32) |
7868 1 << (OP_TEST_STATEID - 32) |
7869 1 << (OP_FREE_STATEID - 32) |
7870 1 << (OP_WRITE - 32)
7871 }
7872};
7873
7874
7875
7876
7877
7878
7879
7880static int nfs4_sp4_select_mode(struct nfs_client *clp,
7881 struct nfs41_state_protection *sp)
7882{
7883 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7884 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7885 1 << (OP_EXCHANGE_ID - 32) |
7886 1 << (OP_CREATE_SESSION - 32) |
7887 1 << (OP_DESTROY_SESSION - 32) |
7888 1 << (OP_DESTROY_CLIENTID - 32)
7889 };
7890 unsigned long flags = 0;
7891 unsigned int i;
7892 int ret = 0;
7893
7894 if (sp->how == SP4_MACH_CRED) {
7895
7896 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7897 for (i = 0; i <= LAST_NFS4_OP; i++) {
7898 if (test_bit(i, sp->enforce.u.longs))
7899 dfprintk(MOUNT, " enforce op %d\n", i);
7900 if (test_bit(i, sp->allow.u.longs))
7901 dfprintk(MOUNT, " allow op %d\n", i);
7902 }
7903
7904
7905 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7906 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7907 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7908 ret = -EINVAL;
7909 goto out;
7910 }
7911 }
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7923 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7924 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7925 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7926 dfprintk(MOUNT, "sp4_mach_cred:\n");
7927 dfprintk(MOUNT, " minimal mode enabled\n");
7928 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
7929 } else {
7930 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7931 ret = -EINVAL;
7932 goto out;
7933 }
7934
7935 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7936 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7937 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7938 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7939 dfprintk(MOUNT, " cleanup mode enabled\n");
7940 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
7941 }
7942
7943 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7944 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7945 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
7946 }
7947
7948 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7949 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7950 dfprintk(MOUNT, " secinfo mode enabled\n");
7951 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
7952 }
7953
7954 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7955 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7956 dfprintk(MOUNT, " stateid mode enabled\n");
7957 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
7958 }
7959
7960 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7961 dfprintk(MOUNT, " write mode enabled\n");
7962 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
7963 }
7964
7965 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7966 dfprintk(MOUNT, " commit mode enabled\n");
7967 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
7968 }
7969 }
7970out:
7971 clp->cl_sp4_flags = flags;
7972 return ret;
7973}
7974
7975struct nfs41_exchange_id_data {
7976 struct nfs41_exchange_id_res res;
7977 struct nfs41_exchange_id_args args;
7978};
7979
7980static void nfs4_exchange_id_release(void *data)
7981{
7982 struct nfs41_exchange_id_data *cdata =
7983 (struct nfs41_exchange_id_data *)data;
7984
7985 nfs_put_client(cdata->args.client);
7986 kfree(cdata->res.impl_id);
7987 kfree(cdata->res.server_scope);
7988 kfree(cdata->res.server_owner);
7989 kfree(cdata);
7990}
7991
7992static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7993 .rpc_release = nfs4_exchange_id_release,
7994};
7995
7996
7997
7998
7999
8000
8001static struct rpc_task *
8002nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
8003 u32 sp4_how, struct rpc_xprt *xprt)
8004{
8005 struct rpc_message msg = {
8006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
8007 .rpc_cred = cred,
8008 };
8009 struct rpc_task_setup task_setup_data = {
8010 .rpc_client = clp->cl_rpcclient,
8011 .callback_ops = &nfs4_exchange_id_call_ops,
8012 .rpc_message = &msg,
8013 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8014 };
8015 struct nfs41_exchange_id_data *calldata;
8016 int status;
8017
8018 if (!refcount_inc_not_zero(&clp->cl_count))
8019 return ERR_PTR(-EIO);
8020
8021 status = -ENOMEM;
8022 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8023 if (!calldata)
8024 goto out;
8025
8026 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
8027
8028 status = nfs4_init_uniform_client_string(clp);
8029 if (status)
8030 goto out_calldata;
8031
8032 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8033 GFP_NOFS);
8034 status = -ENOMEM;
8035 if (unlikely(calldata->res.server_owner == NULL))
8036 goto out_calldata;
8037
8038 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
8039 GFP_NOFS);
8040 if (unlikely(calldata->res.server_scope == NULL))
8041 goto out_server_owner;
8042
8043 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8044 if (unlikely(calldata->res.impl_id == NULL))
8045 goto out_server_scope;
8046
8047 switch (sp4_how) {
8048 case SP4_NONE:
8049 calldata->args.state_protect.how = SP4_NONE;
8050 break;
8051
8052 case SP4_MACH_CRED:
8053 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
8054 break;
8055
8056 default:
8057
8058 WARN_ON_ONCE(1);
8059 status = -EINVAL;
8060 goto out_impl_id;
8061 }
8062 if (xprt) {
8063 task_setup_data.rpc_xprt = xprt;
8064 task_setup_data.flags |= RPC_TASK_SOFTCONN;
8065 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8066 sizeof(calldata->args.verifier.data));
8067 }
8068 calldata->args.client = clp;
8069 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
8070 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8071#ifdef CONFIG_NFS_V4_1_MIGRATION
8072 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8073#endif
8074 msg.rpc_argp = &calldata->args;
8075 msg.rpc_resp = &calldata->res;
8076 task_setup_data.callback_data = calldata;
8077
8078 return rpc_run_task(&task_setup_data);
8079
8080out_impl_id:
8081 kfree(calldata->res.impl_id);
8082out_server_scope:
8083 kfree(calldata->res.server_scope);
8084out_server_owner:
8085 kfree(calldata->res.server_owner);
8086out_calldata:
8087 kfree(calldata);
8088out:
8089 nfs_put_client(clp);
8090 return ERR_PTR(status);
8091}
8092
8093
8094
8095
8096
8097
8098static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
8099 u32 sp4_how)
8100{
8101 struct rpc_task *task;
8102 struct nfs41_exchange_id_args *argp;
8103 struct nfs41_exchange_id_res *resp;
8104 int status;
8105
8106 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8107 if (IS_ERR(task))
8108 return PTR_ERR(task);
8109
8110 argp = task->tk_msg.rpc_argp;
8111 resp = task->tk_msg.rpc_resp;
8112 status = task->tk_status;
8113 if (status != 0)
8114 goto out;
8115
8116 status = nfs4_check_cl_exchange_flags(resp->flags);
8117 if (status != 0)
8118 goto out;
8119
8120 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8121 if (status != 0)
8122 goto out;
8123
8124 clp->cl_clientid = resp->clientid;
8125 clp->cl_exchange_flags = resp->flags;
8126 clp->cl_seqid = resp->seqid;
8127
8128 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8129 clear_bit(NFS4_SESSION_ESTABLISHED,
8130 &clp->cl_session->session_state);
8131
8132 if (clp->cl_serverscope != NULL &&
8133 !nfs41_same_server_scope(clp->cl_serverscope,
8134 resp->server_scope)) {
8135 dprintk("%s: server_scope mismatch detected\n",
8136 __func__);
8137 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8138 }
8139
8140 swap(clp->cl_serverowner, resp->server_owner);
8141 swap(clp->cl_serverscope, resp->server_scope);
8142 swap(clp->cl_implid, resp->impl_id);
8143
8144
8145 memcpy(clp->cl_confirm.data, argp->verifier.data,
8146 sizeof(clp->cl_confirm.data));
8147out:
8148 trace_nfs4_exchange_id(clp, status);
8149 rpc_put_task(task);
8150 return status;
8151}
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
8166{
8167 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8168 int status;
8169
8170
8171 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8172 authflavor == RPC_AUTH_GSS_KRB5P) {
8173 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
8174 if (!status)
8175 return 0;
8176 }
8177
8178
8179 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
8180}
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
8198 void *data)
8199{
8200 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
8201 struct rpc_task *task;
8202 int status;
8203
8204 u32 sp4_how;
8205
8206 dprintk("--> %s try %s\n", __func__,
8207 xprt->address_strings[RPC_DISPLAY_ADDR]);
8208
8209 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8210
8211
8212 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8213 if (IS_ERR(task))
8214 return;
8215
8216 status = task->tk_status;
8217 if (status == 0)
8218 status = nfs4_detect_session_trunking(adata->clp,
8219 task->tk_msg.rpc_resp, xprt);
8220
8221 if (status == 0)
8222 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8223
8224 rpc_put_task(task);
8225}
8226EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
8227
8228static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
8229 const struct cred *cred)
8230{
8231 struct rpc_message msg = {
8232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8233 .rpc_argp = clp,
8234 .rpc_cred = cred,
8235 };
8236 int status;
8237
8238 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8239 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8240 trace_nfs4_destroy_clientid(clp, status);
8241 if (status)
8242 dprintk("NFS: Got error %d from the server %s on "
8243 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8244 return status;
8245}
8246
8247static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
8248 const struct cred *cred)
8249{
8250 unsigned int loop;
8251 int ret;
8252
8253 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8254 ret = _nfs4_proc_destroy_clientid(clp, cred);
8255 switch (ret) {
8256 case -NFS4ERR_DELAY:
8257 case -NFS4ERR_CLIENTID_BUSY:
8258 ssleep(1);
8259 break;
8260 default:
8261 return ret;
8262 }
8263 }
8264 return 0;
8265}
8266
8267int nfs4_destroy_clientid(struct nfs_client *clp)
8268{
8269 const struct cred *cred;
8270 int ret = 0;
8271
8272 if (clp->cl_mvops->minor_version < 1)
8273 goto out;
8274 if (clp->cl_exchange_flags == 0)
8275 goto out;
8276 if (clp->cl_preserve_clid)
8277 goto out;
8278 cred = nfs4_get_clid_cred(clp);
8279 ret = nfs4_proc_destroy_clientid(clp, cred);
8280 put_cred(cred);
8281 switch (ret) {
8282 case 0:
8283 case -NFS4ERR_STALE_CLIENTID:
8284 clp->cl_exchange_flags = 0;
8285 }
8286out:
8287 return ret;
8288}
8289
8290#endif
8291
8292struct nfs4_get_lease_time_data {
8293 struct nfs4_get_lease_time_args *args;
8294 struct nfs4_get_lease_time_res *res;
8295 struct nfs_client *clp;
8296};
8297
8298static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8299 void *calldata)
8300{
8301 struct nfs4_get_lease_time_data *data =
8302 (struct nfs4_get_lease_time_data *)calldata;
8303
8304 dprintk("--> %s\n", __func__);
8305
8306
8307 nfs4_setup_sequence(data->clp,
8308 &data->args->la_seq_args,
8309 &data->res->lr_seq_res,
8310 task);
8311 dprintk("<-- %s\n", __func__);
8312}
8313
8314
8315
8316
8317
8318static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8319{
8320 struct nfs4_get_lease_time_data *data =
8321 (struct nfs4_get_lease_time_data *)calldata;
8322
8323 dprintk("--> %s\n", __func__);
8324 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
8325 return;
8326 switch (task->tk_status) {
8327 case -NFS4ERR_DELAY:
8328 case -NFS4ERR_GRACE:
8329 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8330 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8331 task->tk_status = 0;
8332
8333 case -NFS4ERR_RETRY_UNCACHED_REP:
8334 rpc_restart_call_prepare(task);
8335 return;
8336 }
8337 dprintk("<-- %s\n", __func__);
8338}
8339
8340static const struct rpc_call_ops nfs4_get_lease_time_ops = {
8341 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8342 .rpc_call_done = nfs4_get_lease_time_done,
8343};
8344
8345int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8346{
8347 struct rpc_task *task;
8348 struct nfs4_get_lease_time_args args;
8349 struct nfs4_get_lease_time_res res = {
8350 .lr_fsinfo = fsinfo,
8351 };
8352 struct nfs4_get_lease_time_data data = {
8353 .args = &args,
8354 .res = &res,
8355 .clp = clp,
8356 };
8357 struct rpc_message msg = {
8358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8359 .rpc_argp = &args,
8360 .rpc_resp = &res,
8361 };
8362 struct rpc_task_setup task_setup = {
8363 .rpc_client = clp->cl_rpcclient,
8364 .rpc_message = &msg,
8365 .callback_ops = &nfs4_get_lease_time_ops,
8366 .callback_data = &data,
8367 .flags = RPC_TASK_TIMEOUT,
8368 };
8369 int status;
8370
8371 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
8372 task = rpc_run_task(&task_setup);
8373
8374 if (IS_ERR(task))
8375 return PTR_ERR(task);
8376
8377 status = task->tk_status;
8378 rpc_put_task(task);
8379 return status;
8380}
8381
8382#ifdef CONFIG_NFS_V4_1
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8394 struct rpc_clnt *clnt)
8395{
8396 unsigned int max_rqst_sz, max_resp_sz;
8397 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
8398 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
8399
8400 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8401 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
8402
8403
8404 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8405 args->fc_attrs.max_resp_sz = max_resp_sz;
8406 args->fc_attrs.max_ops = NFS4_MAX_OPS;
8407 args->fc_attrs.max_reqs = max_session_slots;
8408
8409 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8410 "max_ops=%u max_reqs=%u\n",
8411 __func__,
8412 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8413 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
8414
8415
8416 args->bc_attrs.max_rqst_sz = max_bc_payload;
8417 args->bc_attrs.max_resp_sz = max_bc_payload;
8418 args->bc_attrs.max_resp_sz_cached = 0;
8419 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
8420 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
8421 if (args->bc_attrs.max_reqs > max_bc_slots)
8422 args->bc_attrs.max_reqs = max_bc_slots;
8423
8424 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8425 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8426 __func__,
8427 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8428 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8429 args->bc_attrs.max_reqs);
8430}
8431
8432static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8433 struct nfs41_create_session_res *res)
8434{
8435 struct nfs4_channel_attrs *sent = &args->fc_attrs;
8436 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
8437
8438 if (rcvd->max_resp_sz > sent->max_resp_sz)
8439 return -EINVAL;
8440
8441
8442
8443
8444
8445
8446 if (rcvd->max_ops < sent->max_ops)
8447 return -EINVAL;
8448 if (rcvd->max_reqs == 0)
8449 return -EINVAL;
8450 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8451 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
8452 return 0;
8453}
8454
8455static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8456 struct nfs41_create_session_res *res)
8457{
8458 struct nfs4_channel_attrs *sent = &args->bc_attrs;
8459 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8460
8461 if (!(res->flags & SESSION4_BACK_CHAN))
8462 goto out;
8463 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8464 return -EINVAL;
8465 if (rcvd->max_resp_sz < sent->max_resp_sz)
8466 return -EINVAL;
8467 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8468 return -EINVAL;
8469 if (rcvd->max_ops > sent->max_ops)
8470 return -EINVAL;
8471 if (rcvd->max_reqs > sent->max_reqs)
8472 return -EINVAL;
8473out:
8474 return 0;
8475}
8476
8477static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8478 struct nfs41_create_session_res *res)
8479{
8480 int ret;
8481
8482 ret = nfs4_verify_fore_channel_attrs(args, res);
8483 if (ret)
8484 return ret;
8485 return nfs4_verify_back_channel_attrs(args, res);
8486}
8487
8488static void nfs4_update_session(struct nfs4_session *session,
8489 struct nfs41_create_session_res *res)
8490{
8491 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8492
8493 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8494 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8495 session->flags = res->flags;
8496 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8497 if (res->flags & SESSION4_BACK_CHAN)
8498 memcpy(&session->bc_attrs, &res->bc_attrs,
8499 sizeof(session->bc_attrs));
8500}
8501
8502static int _nfs4_proc_create_session(struct nfs_client *clp,
8503 const struct cred *cred)
8504{
8505 struct nfs4_session *session = clp->cl_session;
8506 struct nfs41_create_session_args args = {
8507 .client = clp,
8508 .clientid = clp->cl_clientid,
8509 .seqid = clp->cl_seqid,
8510 .cb_program = NFS4_CALLBACK,
8511 };
8512 struct nfs41_create_session_res res;
8513
8514 struct rpc_message msg = {
8515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8516 .rpc_argp = &args,
8517 .rpc_resp = &res,
8518 .rpc_cred = cred,
8519 };
8520 int status;
8521
8522 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8523 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8524
8525 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8526 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8527 trace_nfs4_create_session(clp, status);
8528
8529 switch (status) {
8530 case -NFS4ERR_STALE_CLIENTID:
8531 case -NFS4ERR_DELAY:
8532 case -ETIMEDOUT:
8533 case -EACCES:
8534 case -EAGAIN:
8535 goto out;
8536 };
8537
8538 clp->cl_seqid++;
8539 if (!status) {
8540
8541 status = nfs4_verify_channel_attrs(&args, &res);
8542
8543 if (status)
8544 goto out;
8545 nfs4_update_session(session, &res);
8546 }
8547out:
8548 return status;
8549}
8550
8551
8552
8553
8554
8555
8556int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
8557{
8558 int status;
8559 unsigned *ptr;
8560 struct nfs4_session *session = clp->cl_session;
8561
8562 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8563
8564 status = _nfs4_proc_create_session(clp, cred);
8565 if (status)
8566 goto out;
8567
8568
8569 status = nfs4_setup_session_slot_tables(session);
8570 dprintk("slot table setup returned %d\n", status);
8571 if (status)
8572 goto out;
8573
8574 ptr = (unsigned *)&session->sess_id.data[0];
8575 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8576 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
8577out:
8578 dprintk("<-- %s\n", __func__);
8579 return status;
8580}
8581
8582
8583
8584
8585
8586int nfs4_proc_destroy_session(struct nfs4_session *session,
8587 const struct cred *cred)
8588{
8589 struct rpc_message msg = {
8590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8591 .rpc_argp = session,
8592 .rpc_cred = cred,
8593 };
8594 int status = 0;
8595
8596 dprintk("--> nfs4_proc_destroy_session\n");
8597
8598
8599 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8600 return 0;
8601
8602 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8603 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8604 trace_nfs4_destroy_session(session->clp, status);
8605
8606 if (status)
8607 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8608 "Session has been destroyed regardless...\n", status);
8609
8610 dprintk("<-- nfs4_proc_destroy_session\n");
8611 return status;
8612}
8613
8614
8615
8616
8617struct nfs4_sequence_data {
8618 struct nfs_client *clp;
8619 struct nfs4_sequence_args args;
8620 struct nfs4_sequence_res res;
8621};
8622
8623static void nfs41_sequence_release(void *data)
8624{
8625 struct nfs4_sequence_data *calldata = data;
8626 struct nfs_client *clp = calldata->clp;
8627
8628 if (refcount_read(&clp->cl_count) > 1)
8629 nfs4_schedule_state_renewal(clp);
8630 nfs_put_client(clp);
8631 kfree(calldata);
8632}
8633
8634static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8635{
8636 switch(task->tk_status) {
8637 case -NFS4ERR_DELAY:
8638 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8639 return -EAGAIN;
8640 default:
8641 nfs4_schedule_lease_recovery(clp);
8642 }
8643 return 0;
8644}
8645
8646static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8647{
8648 struct nfs4_sequence_data *calldata = data;
8649 struct nfs_client *clp = calldata->clp;
8650
8651 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8652 return;
8653
8654 trace_nfs4_sequence(clp, task->tk_status);
8655 if (task->tk_status < 0) {
8656 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8657 if (refcount_read(&clp->cl_count) == 1)
8658 goto out;
8659
8660 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8661 rpc_restart_call_prepare(task);
8662 return;
8663 }
8664 }
8665 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8666out:
8667 dprintk("<-- %s\n", __func__);
8668}
8669
8670static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8671{
8672 struct nfs4_sequence_data *calldata = data;
8673 struct nfs_client *clp = calldata->clp;
8674 struct nfs4_sequence_args *args;
8675 struct nfs4_sequence_res *res;
8676
8677 args = task->tk_msg.rpc_argp;
8678 res = task->tk_msg.rpc_resp;
8679
8680 nfs4_setup_sequence(clp, args, res, task);
8681}
8682
8683static const struct rpc_call_ops nfs41_sequence_ops = {
8684 .rpc_call_done = nfs41_sequence_call_done,
8685 .rpc_call_prepare = nfs41_sequence_prepare,
8686 .rpc_release = nfs41_sequence_release,
8687};
8688
8689static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8690 const struct cred *cred,
8691 struct nfs4_slot *slot,
8692 bool is_privileged)
8693{
8694 struct nfs4_sequence_data *calldata;
8695 struct rpc_message msg = {
8696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8697 .rpc_cred = cred,
8698 };
8699 struct rpc_task_setup task_setup_data = {
8700 .rpc_client = clp->cl_rpcclient,
8701 .rpc_message = &msg,
8702 .callback_ops = &nfs41_sequence_ops,
8703 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8704 };
8705 struct rpc_task *ret;
8706
8707 ret = ERR_PTR(-EIO);
8708 if (!refcount_inc_not_zero(&clp->cl_count))
8709 goto out_err;
8710
8711 ret = ERR_PTR(-ENOMEM);
8712 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8713 if (calldata == NULL)
8714 goto out_put_clp;
8715 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
8716 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
8717 msg.rpc_argp = &calldata->args;
8718 msg.rpc_resp = &calldata->res;
8719 calldata->clp = clp;
8720 task_setup_data.callback_data = calldata;
8721
8722 ret = rpc_run_task(&task_setup_data);
8723 if (IS_ERR(ret))
8724 goto out_err;
8725 return ret;
8726out_put_clp:
8727 nfs_put_client(clp);
8728out_err:
8729 nfs41_release_slot(slot);
8730 return ret;
8731}
8732
8733static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
8734{
8735 struct rpc_task *task;
8736 int ret = 0;
8737
8738 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8739 return -EAGAIN;
8740 task = _nfs41_proc_sequence(clp, cred, NULL, false);
8741 if (IS_ERR(task))
8742 ret = PTR_ERR(task);
8743 else
8744 rpc_put_task_async(task);
8745 dprintk("<-- %s status=%d\n", __func__, ret);
8746 return ret;
8747}
8748
8749static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
8750{
8751 struct rpc_task *task;
8752 int ret;
8753
8754 task = _nfs41_proc_sequence(clp, cred, NULL, true);
8755 if (IS_ERR(task)) {
8756 ret = PTR_ERR(task);
8757 goto out;
8758 }
8759 ret = rpc_wait_for_completion_task(task);
8760 if (!ret)
8761 ret = task->tk_status;
8762 rpc_put_task(task);
8763out:
8764 dprintk("<-- %s status=%d\n", __func__, ret);
8765 return ret;
8766}
8767
8768struct nfs4_reclaim_complete_data {
8769 struct nfs_client *clp;
8770 struct nfs41_reclaim_complete_args arg;
8771 struct nfs41_reclaim_complete_res res;
8772};
8773
8774static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8775{
8776 struct nfs4_reclaim_complete_data *calldata = data;
8777
8778 nfs4_setup_sequence(calldata->clp,
8779 &calldata->arg.seq_args,
8780 &calldata->res.seq_res,
8781 task);
8782}
8783
8784static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8785{
8786 switch(task->tk_status) {
8787 case 0:
8788 wake_up_all(&clp->cl_lock_waitq);
8789
8790 case -NFS4ERR_COMPLETE_ALREADY:
8791 case -NFS4ERR_WRONG_CRED:
8792 break;
8793 case -NFS4ERR_DELAY:
8794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8795
8796 case -NFS4ERR_RETRY_UNCACHED_REP:
8797 return -EAGAIN;
8798 case -NFS4ERR_BADSESSION:
8799 case -NFS4ERR_DEADSESSION:
8800 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8801 nfs4_schedule_session_recovery(clp->cl_session,
8802 task->tk_status);
8803 break;
8804 default:
8805 nfs4_schedule_lease_recovery(clp);
8806 }
8807 return 0;
8808}
8809
8810static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8811{
8812 struct nfs4_reclaim_complete_data *calldata = data;
8813 struct nfs_client *clp = calldata->clp;
8814 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8815
8816 dprintk("--> %s\n", __func__);
8817 if (!nfs41_sequence_done(task, res))
8818 return;
8819
8820 trace_nfs4_reclaim_complete(clp, task->tk_status);
8821 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8822 rpc_restart_call_prepare(task);
8823 return;
8824 }
8825 dprintk("<-- %s\n", __func__);
8826}
8827
8828static void nfs4_free_reclaim_complete_data(void *data)
8829{
8830 struct nfs4_reclaim_complete_data *calldata = data;
8831
8832 kfree(calldata);
8833}
8834
8835static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8836 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8837 .rpc_call_done = nfs4_reclaim_complete_done,
8838 .rpc_release = nfs4_free_reclaim_complete_data,
8839};
8840
8841
8842
8843
8844static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8845 const struct cred *cred)
8846{
8847 struct nfs4_reclaim_complete_data *calldata;
8848 struct rpc_task *task;
8849 struct rpc_message msg = {
8850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8851 .rpc_cred = cred,
8852 };
8853 struct rpc_task_setup task_setup_data = {
8854 .rpc_client = clp->cl_rpcclient,
8855 .rpc_message = &msg,
8856 .callback_ops = &nfs4_reclaim_complete_call_ops,
8857 .flags = RPC_TASK_ASYNC | RPC_TASK_NO_ROUND_ROBIN,
8858 };
8859 int status = -ENOMEM;
8860
8861 dprintk("--> %s\n", __func__);
8862 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8863 if (calldata == NULL)
8864 goto out;
8865 calldata->clp = clp;
8866 calldata->arg.one_fs = 0;
8867
8868 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
8869 msg.rpc_argp = &calldata->arg;
8870 msg.rpc_resp = &calldata->res;
8871 task_setup_data.callback_data = calldata;
8872 task = rpc_run_task(&task_setup_data);
8873 if (IS_ERR(task)) {
8874 status = PTR_ERR(task);
8875 goto out;
8876 }
8877 status = rpc_wait_for_completion_task(task);
8878 if (status == 0)
8879 status = task->tk_status;
8880 rpc_put_task(task);
8881out:
8882 dprintk("<-- %s status=%d\n", __func__, status);
8883 return status;
8884}
8885
8886static void
8887nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8888{
8889 struct nfs4_layoutget *lgp = calldata;
8890 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8891
8892 dprintk("--> %s\n", __func__);
8893 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8894 &lgp->res.seq_res, task);
8895 dprintk("<-- %s\n", __func__);
8896}
8897
8898static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8899{
8900 struct nfs4_layoutget *lgp = calldata;
8901
8902 dprintk("--> %s\n", __func__);
8903 nfs41_sequence_process(task, &lgp->res.seq_res);
8904 dprintk("<-- %s\n", __func__);
8905}
8906
8907static int
8908nfs4_layoutget_handle_exception(struct rpc_task *task,
8909 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8910{
8911 struct inode *inode = lgp->args.inode;
8912 struct nfs_server *server = NFS_SERVER(inode);
8913 struct pnfs_layout_hdr *lo;
8914 int nfs4err = task->tk_status;
8915 int err, status = 0;
8916 LIST_HEAD(head);
8917
8918 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8919
8920 nfs4_sequence_free_slot(&lgp->res.seq_res);
8921
8922 switch (nfs4err) {
8923 case 0:
8924 goto out;
8925
8926
8927
8928
8929
8930
8931 case -NFS4ERR_LAYOUTUNAVAILABLE:
8932 status = -ENODATA;
8933 goto out;
8934
8935
8936
8937
8938 case -NFS4ERR_BADLAYOUT:
8939 status = -EOVERFLOW;
8940 goto out;
8941
8942
8943
8944
8945
8946
8947
8948
8949 case -NFS4ERR_LAYOUTTRYLATER:
8950 if (lgp->args.minlength == 0) {
8951 status = -EOVERFLOW;
8952 goto out;
8953 }
8954 status = -EBUSY;
8955 break;
8956 case -NFS4ERR_RECALLCONFLICT:
8957 status = -ERECALLCONFLICT;
8958 break;
8959 case -NFS4ERR_DELEG_REVOKED:
8960 case -NFS4ERR_ADMIN_REVOKED:
8961 case -NFS4ERR_EXPIRED:
8962 case -NFS4ERR_BAD_STATEID:
8963 exception->timeout = 0;
8964 spin_lock(&inode->i_lock);
8965 lo = NFS_I(inode)->layout;
8966
8967 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8968 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
8969 spin_unlock(&inode->i_lock);
8970 exception->state = lgp->args.ctx->state;
8971 exception->stateid = &lgp->args.stateid;
8972 break;
8973 }
8974
8975
8976
8977
8978 pnfs_mark_layout_stateid_invalid(lo, &head);
8979 spin_unlock(&inode->i_lock);
8980 nfs_commit_inode(inode, 0);
8981 pnfs_free_lseg_list(&head);
8982 status = -EAGAIN;
8983 goto out;
8984 }
8985
8986 err = nfs4_handle_exception(server, nfs4err, exception);
8987 if (!status) {
8988 if (exception->retry)
8989 status = -EAGAIN;
8990 else
8991 status = err;
8992 }
8993out:
8994 dprintk("<-- %s\n", __func__);
8995 return status;
8996}
8997
8998size_t max_response_pages(struct nfs_server *server)
8999{
9000 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9001 return nfs_page_array_len(0, max_resp_sz);
9002}
9003
9004static void nfs4_layoutget_release(void *calldata)
9005{
9006 struct nfs4_layoutget *lgp = calldata;
9007
9008 dprintk("--> %s\n", __func__);
9009 nfs4_sequence_free_slot(&lgp->res.seq_res);
9010 pnfs_layoutget_free(lgp);
9011 dprintk("<-- %s\n", __func__);
9012}
9013
9014static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9015 .rpc_call_prepare = nfs4_layoutget_prepare,
9016 .rpc_call_done = nfs4_layoutget_done,
9017 .rpc_release = nfs4_layoutget_release,
9018};
9019
9020struct pnfs_layout_segment *
9021nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
9022{
9023 struct inode *inode = lgp->args.inode;
9024 struct nfs_server *server = NFS_SERVER(inode);
9025 struct rpc_task *task;
9026 struct rpc_message msg = {
9027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9028 .rpc_argp = &lgp->args,
9029 .rpc_resp = &lgp->res,
9030 .rpc_cred = lgp->cred,
9031 };
9032 struct rpc_task_setup task_setup_data = {
9033 .rpc_client = server->client,
9034 .rpc_message = &msg,
9035 .callback_ops = &nfs4_layoutget_call_ops,
9036 .callback_data = lgp,
9037 .flags = RPC_TASK_ASYNC,
9038 };
9039 struct pnfs_layout_segment *lseg = NULL;
9040 struct nfs4_exception exception = {
9041 .inode = inode,
9042 .timeout = *timeout,
9043 };
9044 int status = 0;
9045
9046 dprintk("--> %s\n", __func__);
9047
9048
9049 pnfs_get_layout_hdr(NFS_I(inode)->layout);
9050
9051 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
9052
9053 task = rpc_run_task(&task_setup_data);
9054 if (IS_ERR(task))
9055 return ERR_CAST(task);
9056 status = rpc_wait_for_completion_task(task);
9057 if (status != 0)
9058 goto out;
9059
9060 if (task->tk_status < 0) {
9061 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9062 *timeout = exception.timeout;
9063 } else if (lgp->res.layoutp->len == 0) {
9064 status = -EAGAIN;
9065 *timeout = nfs4_update_delay(&exception.timeout);
9066 } else
9067 lseg = pnfs_layout_process(lgp);
9068out:
9069 trace_nfs4_layoutget(lgp->args.ctx,
9070 &lgp->args.range,
9071 &lgp->res.range,
9072 &lgp->res.stateid,
9073 status);
9074
9075 rpc_put_task(task);
9076 dprintk("<-- %s status=%d\n", __func__, status);
9077 if (status)
9078 return ERR_PTR(status);
9079 return lseg;
9080}
9081
9082static void
9083nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9084{
9085 struct nfs4_layoutreturn *lrp = calldata;
9086
9087 dprintk("--> %s\n", __func__);
9088 nfs4_setup_sequence(lrp->clp,
9089 &lrp->args.seq_args,
9090 &lrp->res.seq_res,
9091 task);
9092 if (!pnfs_layout_is_valid(lrp->args.layout))
9093 rpc_exit(task, 0);
9094}
9095
9096static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9097{
9098 struct nfs4_layoutreturn *lrp = calldata;
9099 struct nfs_server *server;
9100
9101 dprintk("--> %s\n", __func__);
9102
9103 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
9104 return;
9105
9106 server = NFS_SERVER(lrp->args.inode);
9107 switch (task->tk_status) {
9108 case -NFS4ERR_OLD_STATEID:
9109 if (nfs4_layoutreturn_refresh_stateid(&lrp->args.stateid,
9110 &lrp->args.range,
9111 lrp->args.inode))
9112 goto out_restart;
9113
9114 default:
9115 task->tk_status = 0;
9116
9117 case 0:
9118 break;
9119 case -NFS4ERR_DELAY:
9120 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
9121 break;
9122 goto out_restart;
9123 }
9124 dprintk("<-- %s\n", __func__);
9125 return;
9126out_restart:
9127 task->tk_status = 0;
9128 nfs4_sequence_free_slot(&lrp->res.seq_res);
9129 rpc_restart_call_prepare(task);
9130}
9131
9132static void nfs4_layoutreturn_release(void *calldata)
9133{
9134 struct nfs4_layoutreturn *lrp = calldata;
9135 struct pnfs_layout_hdr *lo = lrp->args.layout;
9136
9137 dprintk("--> %s\n", __func__);
9138 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
9139 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
9140 nfs4_sequence_free_slot(&lrp->res.seq_res);
9141 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9142 lrp->ld_private.ops->free(&lrp->ld_private);
9143 pnfs_put_layout_hdr(lrp->args.layout);
9144 nfs_iput_and_deactive(lrp->inode);
9145 kfree(calldata);
9146 dprintk("<-- %s\n", __func__);
9147}
9148
9149static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9150 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9151 .rpc_call_done = nfs4_layoutreturn_done,
9152 .rpc_release = nfs4_layoutreturn_release,
9153};
9154
9155int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
9156{
9157 struct rpc_task *task;
9158 struct rpc_message msg = {
9159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9160 .rpc_argp = &lrp->args,
9161 .rpc_resp = &lrp->res,
9162 .rpc_cred = lrp->cred,
9163 };
9164 struct rpc_task_setup task_setup_data = {
9165 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
9166 .rpc_message = &msg,
9167 .callback_ops = &nfs4_layoutreturn_call_ops,
9168 .callback_data = lrp,
9169 };
9170 int status = 0;
9171
9172 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9173 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9174 &task_setup_data.rpc_client, &msg);
9175
9176 dprintk("--> %s\n", __func__);
9177 if (!sync) {
9178 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9179 if (!lrp->inode) {
9180 nfs4_layoutreturn_release(lrp);
9181 return -EAGAIN;
9182 }
9183 task_setup_data.flags |= RPC_TASK_ASYNC;
9184 }
9185 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
9186 task = rpc_run_task(&task_setup_data);
9187 if (IS_ERR(task))
9188 return PTR_ERR(task);
9189 if (sync)
9190 status = task->tk_status;
9191 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
9192 dprintk("<-- %s status=%d\n", __func__, status);
9193 rpc_put_task(task);
9194 return status;
9195}
9196
9197static int
9198_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9199 struct pnfs_device *pdev,
9200 const struct cred *cred)
9201{
9202 struct nfs4_getdeviceinfo_args args = {
9203 .pdev = pdev,
9204 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9205 NOTIFY_DEVICEID4_DELETE,
9206 };
9207 struct nfs4_getdeviceinfo_res res = {
9208 .pdev = pdev,
9209 };
9210 struct rpc_message msg = {
9211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9212 .rpc_argp = &args,
9213 .rpc_resp = &res,
9214 .rpc_cred = cred,
9215 };
9216 int status;
9217
9218 dprintk("--> %s\n", __func__);
9219 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
9220 if (res.notification & ~args.notify_types)
9221 dprintk("%s: unsupported notification\n", __func__);
9222 if (res.notification != args.notify_types)
9223 pdev->nocache = 1;
9224
9225 dprintk("<-- %s status=%d\n", __func__, status);
9226
9227 return status;
9228}
9229
9230int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9231 struct pnfs_device *pdev,
9232 const struct cred *cred)
9233{
9234 struct nfs4_exception exception = { };
9235 int err;
9236
9237 do {
9238 err = nfs4_handle_exception(server,
9239 _nfs4_proc_getdeviceinfo(server, pdev, cred),
9240 &exception);
9241 } while (exception.retry);
9242 return err;
9243}
9244EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9245
9246static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9247{
9248 struct nfs4_layoutcommit_data *data = calldata;
9249 struct nfs_server *server = NFS_SERVER(data->args.inode);
9250
9251 nfs4_setup_sequence(server->nfs_client,
9252 &data->args.seq_args,
9253 &data->res.seq_res,
9254 task);
9255}
9256
9257static void
9258nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9259{
9260 struct nfs4_layoutcommit_data *data = calldata;
9261 struct nfs_server *server = NFS_SERVER(data->args.inode);
9262
9263 if (!nfs41_sequence_done(task, &data->res.seq_res))
9264 return;
9265
9266 switch (task->tk_status) {
9267 case -NFS4ERR_DELEG_REVOKED:
9268 case -NFS4ERR_BADIOMODE:
9269 case -NFS4ERR_BADLAYOUT:
9270 case -NFS4ERR_GRACE:
9271 task->tk_status = 0;
9272 case 0:
9273 break;
9274 default:
9275 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
9276 rpc_restart_call_prepare(task);
9277 return;
9278 }
9279 }
9280}
9281
9282static void nfs4_layoutcommit_release(void *calldata)
9283{
9284 struct nfs4_layoutcommit_data *data = calldata;
9285
9286 pnfs_cleanup_layoutcommit(data);
9287 nfs_post_op_update_inode_force_wcc(data->args.inode,
9288 data->res.fattr);
9289 put_cred(data->cred);
9290 nfs_iput_and_deactive(data->inode);
9291 kfree(data);
9292}
9293
9294static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9295 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9296 .rpc_call_done = nfs4_layoutcommit_done,
9297 .rpc_release = nfs4_layoutcommit_release,
9298};
9299
9300int
9301nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
9302{
9303 struct rpc_message msg = {
9304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9305 .rpc_argp = &data->args,
9306 .rpc_resp = &data->res,
9307 .rpc_cred = data->cred,
9308 };
9309 struct rpc_task_setup task_setup_data = {
9310 .task = &data->task,
9311 .rpc_client = NFS_CLIENT(data->args.inode),
9312 .rpc_message = &msg,
9313 .callback_ops = &nfs4_layoutcommit_ops,
9314 .callback_data = data,
9315 };
9316 struct rpc_task *task;
9317 int status = 0;
9318
9319 dprintk("NFS: initiating layoutcommit call. sync %d "
9320 "lbw: %llu inode %lu\n", sync,
9321 data->args.lastbytewritten,
9322 data->args.inode->i_ino);
9323
9324 if (!sync) {
9325 data->inode = nfs_igrab_and_active(data->args.inode);
9326 if (data->inode == NULL) {
9327 nfs4_layoutcommit_release(data);
9328 return -EAGAIN;
9329 }
9330 task_setup_data.flags = RPC_TASK_ASYNC;
9331 }
9332 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
9333 task = rpc_run_task(&task_setup_data);
9334 if (IS_ERR(task))
9335 return PTR_ERR(task);
9336 if (sync)
9337 status = task->tk_status;
9338 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
9339 dprintk("%s: status %d\n", __func__, status);
9340 rpc_put_task(task);
9341 return status;
9342}
9343
9344
9345
9346
9347
9348static int
9349_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9350 struct nfs_fsinfo *info,
9351 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
9352{
9353 struct nfs41_secinfo_no_name_args args = {
9354 .style = SECINFO_STYLE_CURRENT_FH,
9355 };
9356 struct nfs4_secinfo_res res = {
9357 .flavors = flavors,
9358 };
9359 struct rpc_message msg = {
9360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9361 .rpc_argp = &args,
9362 .rpc_resp = &res,
9363 };
9364 struct rpc_clnt *clnt = server->client;
9365 const struct cred *cred = NULL;
9366 int status;
9367
9368 if (use_integrity) {
9369 clnt = server->nfs_client->cl_rpcclient;
9370 cred = nfs4_get_clid_cred(server->nfs_client);
9371 msg.rpc_cred = cred;
9372 }
9373
9374 dprintk("--> %s\n", __func__);
9375 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
9376 &res.seq_res, RPC_TASK_NO_ROUND_ROBIN);
9377 dprintk("<-- %s status=%d\n", __func__, status);
9378
9379 put_cred(cred);
9380
9381 return status;
9382}
9383
9384static int
9385nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9386 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9387{
9388 struct nfs4_exception exception = {
9389 .interruptible = true,
9390 };
9391 int err;
9392 do {
9393
9394 err = -NFS4ERR_WRONGSEC;
9395
9396
9397 if (_nfs4_is_integrity_protected(server->nfs_client))
9398 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9399 flavors, true);
9400
9401
9402
9403
9404
9405
9406
9407 if (err == -NFS4ERR_WRONGSEC)
9408 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9409 flavors, false);
9410
9411 switch (err) {
9412 case 0:
9413 case -NFS4ERR_WRONGSEC:
9414 case -ENOTSUPP:
9415 goto out;
9416 default:
9417 err = nfs4_handle_exception(server, err, &exception);
9418 }
9419 } while (exception.retry);
9420out:
9421 return err;
9422}
9423
9424static int
9425nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9426 struct nfs_fsinfo *info)
9427{
9428 int err;
9429 struct page *page;
9430 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
9431 struct nfs4_secinfo_flavors *flavors;
9432 struct nfs4_secinfo4 *secinfo;
9433 int i;
9434
9435 page = alloc_page(GFP_KERNEL);
9436 if (!page) {
9437 err = -ENOMEM;
9438 goto out;
9439 }
9440
9441 flavors = page_address(page);
9442 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9443
9444
9445
9446
9447
9448 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
9449 err = nfs4_find_root_sec(server, fhandle, info);
9450 goto out_freepage;
9451 }
9452 if (err)
9453 goto out_freepage;
9454
9455 for (i = 0; i < flavors->num_flavors; i++) {
9456 secinfo = &flavors->flavors[i];
9457
9458 switch (secinfo->flavor) {
9459 case RPC_AUTH_NULL:
9460 case RPC_AUTH_UNIX:
9461 case RPC_AUTH_GSS:
9462 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9463 &secinfo->flavor_info);
9464 break;
9465 default:
9466 flavor = RPC_AUTH_MAXFLAVOR;
9467 break;
9468 }
9469
9470 if (!nfs_auth_info_match(&server->auth_info, flavor))
9471 flavor = RPC_AUTH_MAXFLAVOR;
9472
9473 if (flavor != RPC_AUTH_MAXFLAVOR) {
9474 err = nfs4_lookup_root_sec(server, fhandle,
9475 info, flavor);
9476 if (!err)
9477 break;
9478 }
9479 }
9480
9481 if (flavor == RPC_AUTH_MAXFLAVOR)
9482 err = -EPERM;
9483
9484out_freepage:
9485 put_page(page);
9486 if (err == -EACCES)
9487 return -EPERM;
9488out:
9489 return err;
9490}
9491
9492static int _nfs41_test_stateid(struct nfs_server *server,
9493 nfs4_stateid *stateid,
9494 const struct cred *cred)
9495{
9496 int status;
9497 struct nfs41_test_stateid_args args = {
9498 .stateid = stateid,
9499 };
9500 struct nfs41_test_stateid_res res;
9501 struct rpc_message msg = {
9502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9503 .rpc_argp = &args,
9504 .rpc_resp = &res,
9505 .rpc_cred = cred,
9506 };
9507 struct rpc_clnt *rpc_client = server->client;
9508
9509 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9510 &rpc_client, &msg);
9511
9512 dprintk("NFS call test_stateid %p\n", stateid);
9513 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
9514 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9515 &args.seq_args, &res.seq_res);
9516 if (status != NFS_OK) {
9517 dprintk("NFS reply test_stateid: failed, %d\n", status);
9518 return status;
9519 }
9520 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9521 return -res.status;
9522}
9523
9524static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9525 int err, struct nfs4_exception *exception)
9526{
9527 exception->retry = 0;
9528 switch(err) {
9529 case -NFS4ERR_DELAY:
9530 case -NFS4ERR_RETRY_UNCACHED_REP:
9531 nfs4_handle_exception(server, err, exception);
9532 break;
9533 case -NFS4ERR_BADSESSION:
9534 case -NFS4ERR_BADSLOT:
9535 case -NFS4ERR_BAD_HIGH_SLOT:
9536 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9537 case -NFS4ERR_DEADSESSION:
9538 nfs4_do_handle_exception(server, err, exception);
9539 }
9540}
9541
9542
9543
9544
9545
9546
9547
9548
9549
9550
9551
9552
9553static int nfs41_test_stateid(struct nfs_server *server,
9554 nfs4_stateid *stateid,
9555 const struct cred *cred)
9556{
9557 struct nfs4_exception exception = {
9558 .interruptible = true,
9559 };
9560 int err;
9561 do {
9562 err = _nfs41_test_stateid(server, stateid, cred);
9563 nfs4_handle_delay_or_session_error(server, err, &exception);
9564 } while (exception.retry);
9565 return err;
9566}
9567
9568struct nfs_free_stateid_data {
9569 struct nfs_server *server;
9570 struct nfs41_free_stateid_args args;
9571 struct nfs41_free_stateid_res res;
9572};
9573
9574static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9575{
9576 struct nfs_free_stateid_data *data = calldata;
9577 nfs4_setup_sequence(data->server->nfs_client,
9578 &data->args.seq_args,
9579 &data->res.seq_res,
9580 task);
9581}
9582
9583static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9584{
9585 struct nfs_free_stateid_data *data = calldata;
9586
9587 nfs41_sequence_done(task, &data->res.seq_res);
9588
9589 switch (task->tk_status) {
9590 case -NFS4ERR_DELAY:
9591 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9592 rpc_restart_call_prepare(task);
9593 }
9594}
9595
9596static void nfs41_free_stateid_release(void *calldata)
9597{
9598 kfree(calldata);
9599}
9600
9601static const struct rpc_call_ops nfs41_free_stateid_ops = {
9602 .rpc_call_prepare = nfs41_free_stateid_prepare,
9603 .rpc_call_done = nfs41_free_stateid_done,
9604 .rpc_release = nfs41_free_stateid_release,
9605};
9606
9607
9608
9609
9610
9611
9612
9613
9614
9615
9616
9617static int nfs41_free_stateid(struct nfs_server *server,
9618 const nfs4_stateid *stateid,
9619 const struct cred *cred,
9620 bool privileged)
9621{
9622 struct rpc_message msg = {
9623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9624 .rpc_cred = cred,
9625 };
9626 struct rpc_task_setup task_setup = {
9627 .rpc_client = server->client,
9628 .rpc_message = &msg,
9629 .callback_ops = &nfs41_free_stateid_ops,
9630 .flags = RPC_TASK_ASYNC,
9631 };
9632 struct nfs_free_stateid_data *data;
9633 struct rpc_task *task;
9634
9635 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9636 &task_setup.rpc_client, &msg);
9637
9638 dprintk("NFS call free_stateid %p\n", stateid);
9639 data = kmalloc(sizeof(*data), GFP_NOFS);
9640 if (!data)
9641 return -ENOMEM;
9642 data->server = server;
9643 nfs4_stateid_copy(&data->args.stateid, stateid);
9644
9645 task_setup.callback_data = data;
9646
9647 msg.rpc_argp = &data->args;
9648 msg.rpc_resp = &data->res;
9649 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
9650 task = rpc_run_task(&task_setup);
9651 if (IS_ERR(task))
9652 return PTR_ERR(task);
9653 rpc_put_task(task);
9654 return 0;
9655}
9656
9657static void
9658nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9659{
9660 const struct cred *cred = lsp->ls_state->owner->so_cred;
9661
9662 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9663 nfs4_free_lock_state(server, lsp);
9664}
9665
9666static bool nfs41_match_stateid(const nfs4_stateid *s1,
9667 const nfs4_stateid *s2)
9668{
9669 if (s1->type != s2->type)
9670 return false;
9671
9672 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9673 return false;
9674
9675 if (s1->seqid == s2->seqid)
9676 return true;
9677
9678 return s1->seqid == 0 || s2->seqid == 0;
9679}
9680
9681#endif
9682
9683static bool nfs4_match_stateid(const nfs4_stateid *s1,
9684 const nfs4_stateid *s2)
9685{
9686 return nfs4_stateid_match(s1, s2);
9687}
9688
9689
9690static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9691 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9692 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9693 .recover_open = nfs4_open_reclaim,
9694 .recover_lock = nfs4_lock_reclaim,
9695 .establish_clid = nfs4_init_clientid,
9696 .detect_trunking = nfs40_discover_server_trunking,
9697};
9698
9699#if defined(CONFIG_NFS_V4_1)
9700static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9701 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9702 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9703 .recover_open = nfs4_open_reclaim,
9704 .recover_lock = nfs4_lock_reclaim,
9705 .establish_clid = nfs41_init_clientid,
9706 .reclaim_complete = nfs41_proc_reclaim_complete,
9707 .detect_trunking = nfs41_discover_server_trunking,
9708};
9709#endif
9710
9711static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9712 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9713 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9714 .recover_open = nfs40_open_expired,
9715 .recover_lock = nfs4_lock_expired,
9716 .establish_clid = nfs4_init_clientid,
9717};
9718
9719#if defined(CONFIG_NFS_V4_1)
9720static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9721 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9722 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9723 .recover_open = nfs41_open_expired,
9724 .recover_lock = nfs41_lock_expired,
9725 .establish_clid = nfs41_init_clientid,
9726};
9727#endif
9728
9729static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9730 .sched_state_renewal = nfs4_proc_async_renew,
9731 .get_state_renewal_cred = nfs4_get_renew_cred,
9732 .renew_lease = nfs4_proc_renew,
9733};
9734
9735#if defined(CONFIG_NFS_V4_1)
9736static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9737 .sched_state_renewal = nfs41_proc_async_sequence,
9738 .get_state_renewal_cred = nfs4_get_machine_cred,
9739 .renew_lease = nfs4_proc_sequence,
9740};
9741#endif
9742
9743static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9744 .get_locations = _nfs40_proc_get_locations,
9745 .fsid_present = _nfs40_proc_fsid_present,
9746};
9747
9748#if defined(CONFIG_NFS_V4_1)
9749static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9750 .get_locations = _nfs41_proc_get_locations,
9751 .fsid_present = _nfs41_proc_fsid_present,
9752};
9753#endif
9754
9755static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9756 .minor_version = 0,
9757 .init_caps = NFS_CAP_READDIRPLUS
9758 | NFS_CAP_ATOMIC_OPEN
9759 | NFS_CAP_POSIX_LOCK,
9760 .init_client = nfs40_init_client,
9761 .shutdown_client = nfs40_shutdown_client,
9762 .match_stateid = nfs4_match_stateid,
9763 .find_root_sec = nfs4_find_root_sec,
9764 .free_lock_state = nfs4_release_lockowner,
9765 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9766 .alloc_seqid = nfs_alloc_seqid,
9767 .call_sync_ops = &nfs40_call_sync_ops,
9768 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9769 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9770 .state_renewal_ops = &nfs40_state_renewal_ops,
9771 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9772};
9773
9774#if defined(CONFIG_NFS_V4_1)
9775static struct nfs_seqid *
9776nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9777{
9778 return NULL;
9779}
9780
9781static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9782 .minor_version = 1,
9783 .init_caps = NFS_CAP_READDIRPLUS
9784 | NFS_CAP_ATOMIC_OPEN
9785 | NFS_CAP_POSIX_LOCK
9786 | NFS_CAP_STATEID_NFSV41
9787 | NFS_CAP_ATOMIC_OPEN_V1
9788 | NFS_CAP_LGOPEN,
9789 .init_client = nfs41_init_client,
9790 .shutdown_client = nfs41_shutdown_client,
9791 .match_stateid = nfs41_match_stateid,
9792 .find_root_sec = nfs41_find_root_sec,
9793 .free_lock_state = nfs41_free_lock_state,
9794 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9795 .alloc_seqid = nfs_alloc_no_seqid,
9796 .session_trunk = nfs4_test_session_trunk,
9797 .call_sync_ops = &nfs41_call_sync_ops,
9798 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9799 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9800 .state_renewal_ops = &nfs41_state_renewal_ops,
9801 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9802};
9803#endif
9804
9805#if defined(CONFIG_NFS_V4_2)
9806static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9807 .minor_version = 2,
9808 .init_caps = NFS_CAP_READDIRPLUS
9809 | NFS_CAP_ATOMIC_OPEN
9810 | NFS_CAP_POSIX_LOCK
9811 | NFS_CAP_STATEID_NFSV41
9812 | NFS_CAP_ATOMIC_OPEN_V1
9813 | NFS_CAP_LGOPEN
9814 | NFS_CAP_ALLOCATE
9815 | NFS_CAP_COPY
9816 | NFS_CAP_OFFLOAD_CANCEL
9817 | NFS_CAP_DEALLOCATE
9818 | NFS_CAP_SEEK
9819 | NFS_CAP_LAYOUTSTATS
9820 | NFS_CAP_CLONE
9821 | NFS_CAP_LAYOUTERROR,
9822 .init_client = nfs41_init_client,
9823 .shutdown_client = nfs41_shutdown_client,
9824 .match_stateid = nfs41_match_stateid,
9825 .find_root_sec = nfs41_find_root_sec,
9826 .free_lock_state = nfs41_free_lock_state,
9827 .call_sync_ops = &nfs41_call_sync_ops,
9828 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9829 .alloc_seqid = nfs_alloc_no_seqid,
9830 .session_trunk = nfs4_test_session_trunk,
9831 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9832 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9833 .state_renewal_ops = &nfs41_state_renewal_ops,
9834 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9835};
9836#endif
9837
9838const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9839 [0] = &nfs_v4_0_minor_ops,
9840#if defined(CONFIG_NFS_V4_1)
9841 [1] = &nfs_v4_1_minor_ops,
9842#endif
9843#if defined(CONFIG_NFS_V4_2)
9844 [2] = &nfs_v4_2_minor_ops,
9845#endif
9846};
9847
9848static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9849{
9850 ssize_t error, error2;
9851
9852 error = generic_listxattr(dentry, list, size);
9853 if (error < 0)
9854 return error;
9855 if (list) {
9856 list += error;
9857 size -= error;
9858 }
9859
9860 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9861 if (error2 < 0)
9862 return error2;
9863 return error + error2;
9864}
9865
9866static const struct inode_operations nfs4_dir_inode_operations = {
9867 .create = nfs_create,
9868 .lookup = nfs_lookup,
9869 .atomic_open = nfs_atomic_open,
9870 .link = nfs_link,
9871 .unlink = nfs_unlink,
9872 .symlink = nfs_symlink,
9873 .mkdir = nfs_mkdir,
9874 .rmdir = nfs_rmdir,
9875 .mknod = nfs_mknod,
9876 .rename = nfs_rename,
9877 .permission = nfs_permission,
9878 .getattr = nfs_getattr,
9879 .setattr = nfs_setattr,
9880 .listxattr = nfs4_listxattr,
9881};
9882
9883static const struct inode_operations nfs4_file_inode_operations = {
9884 .permission = nfs_permission,
9885 .getattr = nfs_getattr,
9886 .setattr = nfs_setattr,
9887 .listxattr = nfs4_listxattr,
9888};
9889
9890const struct nfs_rpc_ops nfs_v4_clientops = {
9891 .version = 4,
9892 .dentry_ops = &nfs4_dentry_operations,
9893 .dir_inode_ops = &nfs4_dir_inode_operations,
9894 .file_inode_ops = &nfs4_file_inode_operations,
9895 .file_ops = &nfs4_file_operations,
9896 .getroot = nfs4_proc_get_root,
9897 .submount = nfs4_submount,
9898 .try_mount = nfs4_try_mount,
9899 .getattr = nfs4_proc_getattr,
9900 .setattr = nfs4_proc_setattr,
9901 .lookup = nfs4_proc_lookup,
9902 .lookupp = nfs4_proc_lookupp,
9903 .access = nfs4_proc_access,
9904 .readlink = nfs4_proc_readlink,
9905 .create = nfs4_proc_create,
9906 .remove = nfs4_proc_remove,
9907 .unlink_setup = nfs4_proc_unlink_setup,
9908 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9909 .unlink_done = nfs4_proc_unlink_done,
9910 .rename_setup = nfs4_proc_rename_setup,
9911 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9912 .rename_done = nfs4_proc_rename_done,
9913 .link = nfs4_proc_link,
9914 .symlink = nfs4_proc_symlink,
9915 .mkdir = nfs4_proc_mkdir,
9916 .rmdir = nfs4_proc_rmdir,
9917 .readdir = nfs4_proc_readdir,
9918 .mknod = nfs4_proc_mknod,
9919 .statfs = nfs4_proc_statfs,
9920 .fsinfo = nfs4_proc_fsinfo,
9921 .pathconf = nfs4_proc_pathconf,
9922 .set_capabilities = nfs4_server_capabilities,
9923 .decode_dirent = nfs4_decode_dirent,
9924 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9925 .read_setup = nfs4_proc_read_setup,
9926 .read_done = nfs4_read_done,
9927 .write_setup = nfs4_proc_write_setup,
9928 .write_done = nfs4_write_done,
9929 .commit_setup = nfs4_proc_commit_setup,
9930 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9931 .commit_done = nfs4_commit_done,
9932 .lock = nfs4_proc_lock,
9933 .clear_acl_cache = nfs4_zap_acl_attr,
9934 .close_context = nfs4_close_context,
9935 .open_context = nfs4_atomic_open,
9936 .have_delegation = nfs4_have_delegation,
9937 .alloc_client = nfs4_alloc_client,
9938 .init_client = nfs4_init_client,
9939 .free_client = nfs4_free_client,
9940 .create_server = nfs4_create_server,
9941 .clone_server = nfs_clone_server,
9942};
9943
9944static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9945 .name = XATTR_NAME_NFSV4_ACL,
9946 .list = nfs4_xattr_list_nfs4_acl,
9947 .get = nfs4_xattr_get_nfs4_acl,
9948 .set = nfs4_xattr_set_nfs4_acl,
9949};
9950
9951const struct xattr_handler *nfs4_xattr_handlers[] = {
9952 &nfs4_xattr_nfs4_acl_handler,
9953#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9954 &nfs4_xattr_nfs4_label_handler,
9955#endif
9956 NULL
9957};
9958
9959
9960
9961
9962
9963
9964