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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 "sysfs.h"
67#include "nfs4idmap.h"
68#include "nfs4session.h"
69#include "fscache.h"
70#include "nfs42.h"
71
72#include "nfs4trace.h"
73
74#ifdef CONFIG_NFS_V4_2
75#include "nfs42.h"
76#endif
77
78#define NFSDBG_FACILITY NFSDBG_PROC
79
80#define NFS4_BITMASK_SZ 3
81
82#define NFS4_POLL_RETRY_MIN (HZ/10)
83#define NFS4_POLL_RETRY_MAX (15*HZ)
84
85
86#define NFS4_VALID_ATTRS (ATTR_MODE \
87 | ATTR_UID \
88 | ATTR_GID \
89 | ATTR_SIZE \
90 | ATTR_ATIME \
91 | ATTR_MTIME \
92 | ATTR_CTIME \
93 | ATTR_ATIME_SET \
94 | ATTR_MTIME_SET)
95
96struct nfs4_opendata;
97static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
98static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
99static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
100static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
101static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
102 struct nfs_fattr *fattr, struct iattr *sattr,
103 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
104 struct nfs4_label *olabel);
105#ifdef CONFIG_NFS_V4_1
106static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
107 const struct cred *cred,
108 struct nfs4_slot *slot,
109 bool is_privileged);
110static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
111 const struct cred *);
112static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
113 const struct cred *, bool);
114#endif
115static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode,
116 struct nfs_server *server,
117 struct nfs4_label *label);
118
119#ifdef CONFIG_NFS_V4_SECURITY_LABEL
120static inline struct nfs4_label *
121nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
122 struct iattr *sattr, struct nfs4_label *label)
123{
124 int err;
125
126 if (label == NULL)
127 return NULL;
128
129 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
130 return NULL;
131
132 err = security_dentry_init_security(dentry, sattr->ia_mode,
133 &dentry->d_name, (void **)&label->label, &label->len);
134 if (err == 0)
135 return label;
136
137 return NULL;
138}
139static inline void
140nfs4_label_release_security(struct nfs4_label *label)
141{
142 if (label)
143 security_release_secctx(label->label, label->len);
144}
145static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
146{
147 if (label)
148 return server->attr_bitmask;
149
150 return server->attr_bitmask_nl;
151}
152#else
153static inline struct nfs4_label *
154nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
155 struct iattr *sattr, struct nfs4_label *l)
156{ return NULL; }
157static inline void
158nfs4_label_release_security(struct nfs4_label *label)
159{ return; }
160static inline u32 *
161nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
162{ return server->attr_bitmask; }
163#endif
164
165
166static int nfs4_map_errors(int err)
167{
168 if (err >= -1000)
169 return err;
170 switch (err) {
171 case -NFS4ERR_RESOURCE:
172 case -NFS4ERR_LAYOUTTRYLATER:
173 case -NFS4ERR_RECALLCONFLICT:
174 return -EREMOTEIO;
175 case -NFS4ERR_WRONGSEC:
176 case -NFS4ERR_WRONG_CRED:
177 return -EPERM;
178 case -NFS4ERR_BADOWNER:
179 case -NFS4ERR_BADNAME:
180 return -EINVAL;
181 case -NFS4ERR_SHARE_DENIED:
182 return -EACCES;
183 case -NFS4ERR_MINOR_VERS_MISMATCH:
184 return -EPROTONOSUPPORT;
185 case -NFS4ERR_FILE_OPEN:
186 return -EBUSY;
187 default:
188 dprintk("%s could not handle NFSv4 error %d\n",
189 __func__, -err);
190 break;
191 }
192 return -EIO;
193}
194
195
196
197
198const u32 nfs4_fattr_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY
213 | FATTR4_WORD1_MOUNTED_ON_FILEID,
214#ifdef CONFIG_NFS_V4_SECURITY_LABEL
215 FATTR4_WORD2_SECURITY_LABEL
216#endif
217};
218
219static const u32 nfs4_pnfs_open_bitmap[3] = {
220 FATTR4_WORD0_TYPE
221 | FATTR4_WORD0_CHANGE
222 | FATTR4_WORD0_SIZE
223 | FATTR4_WORD0_FSID
224 | FATTR4_WORD0_FILEID,
225 FATTR4_WORD1_MODE
226 | FATTR4_WORD1_NUMLINKS
227 | FATTR4_WORD1_OWNER
228 | FATTR4_WORD1_OWNER_GROUP
229 | FATTR4_WORD1_RAWDEV
230 | FATTR4_WORD1_SPACE_USED
231 | FATTR4_WORD1_TIME_ACCESS
232 | FATTR4_WORD1_TIME_METADATA
233 | FATTR4_WORD1_TIME_MODIFY,
234 FATTR4_WORD2_MDSTHRESHOLD
235#ifdef CONFIG_NFS_V4_SECURITY_LABEL
236 | FATTR4_WORD2_SECURITY_LABEL
237#endif
238};
239
240static const u32 nfs4_open_noattr_bitmap[3] = {
241 FATTR4_WORD0_TYPE
242 | FATTR4_WORD0_FILEID,
243};
244
245const u32 nfs4_statfs_bitmap[3] = {
246 FATTR4_WORD0_FILES_AVAIL
247 | FATTR4_WORD0_FILES_FREE
248 | FATTR4_WORD0_FILES_TOTAL,
249 FATTR4_WORD1_SPACE_AVAIL
250 | FATTR4_WORD1_SPACE_FREE
251 | FATTR4_WORD1_SPACE_TOTAL
252};
253
254const u32 nfs4_pathconf_bitmap[3] = {
255 FATTR4_WORD0_MAXLINK
256 | FATTR4_WORD0_MAXNAME,
257 0
258};
259
260const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
261 | FATTR4_WORD0_MAXREAD
262 | FATTR4_WORD0_MAXWRITE
263 | FATTR4_WORD0_LEASE_TIME,
264 FATTR4_WORD1_TIME_DELTA
265 | FATTR4_WORD1_FS_LAYOUT_TYPES,
266 FATTR4_WORD2_LAYOUT_BLKSIZE
267 | FATTR4_WORD2_CLONE_BLKSIZE
268 | FATTR4_WORD2_XATTR_SUPPORT
269};
270
271const u32 nfs4_fs_locations_bitmap[3] = {
272 FATTR4_WORD0_CHANGE
273 | FATTR4_WORD0_SIZE
274 | FATTR4_WORD0_FSID
275 | FATTR4_WORD0_FILEID
276 | FATTR4_WORD0_FS_LOCATIONS,
277 FATTR4_WORD1_OWNER
278 | FATTR4_WORD1_OWNER_GROUP
279 | FATTR4_WORD1_RAWDEV
280 | FATTR4_WORD1_SPACE_USED
281 | FATTR4_WORD1_TIME_ACCESS
282 | FATTR4_WORD1_TIME_METADATA
283 | FATTR4_WORD1_TIME_MODIFY
284 | FATTR4_WORD1_MOUNTED_ON_FILEID,
285};
286
287static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
288 struct inode *inode)
289{
290 unsigned long cache_validity;
291
292 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
293 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
294 return;
295
296 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
297 if (!(cache_validity & NFS_INO_REVAL_FORCED))
298 cache_validity &= ~(NFS_INO_INVALID_CHANGE
299 | NFS_INO_INVALID_SIZE);
300
301 if (!(cache_validity & NFS_INO_INVALID_SIZE))
302 dst[0] &= ~FATTR4_WORD0_SIZE;
303
304 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
305 dst[0] &= ~FATTR4_WORD0_CHANGE;
306}
307
308static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
309 const __u32 *src, struct inode *inode)
310{
311 nfs4_bitmap_copy_adjust(dst, src, inode);
312}
313
314static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
315 struct nfs4_readdir_arg *readdir)
316{
317 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
318 __be32 *start, *p;
319
320 if (cookie > 2) {
321 readdir->cookie = cookie;
322 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
323 return;
324 }
325
326 readdir->cookie = 0;
327 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
328 if (cookie == 2)
329 return;
330
331
332
333
334
335
336
337
338 start = p = kmap_atomic(*readdir->pages);
339
340 if (cookie == 0) {
341 *p++ = xdr_one;
342 *p++ = xdr_zero;
343 *p++ = xdr_one;
344 *p++ = xdr_one;
345 memcpy(p, ".\0\0\0", 4);
346 p++;
347 *p++ = xdr_one;
348 *p++ = htonl(attrs);
349 *p++ = htonl(12);
350 *p++ = htonl(NF4DIR);
351 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
352 }
353
354 *p++ = xdr_one;
355 *p++ = xdr_zero;
356 *p++ = xdr_two;
357 *p++ = xdr_two;
358 memcpy(p, "..\0\0", 4);
359 p++;
360 *p++ = xdr_one;
361 *p++ = htonl(attrs);
362 *p++ = htonl(12);
363 *p++ = htonl(NF4DIR);
364 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
365
366 readdir->pgbase = (char *)p - (char *)start;
367 readdir->count -= readdir->pgbase;
368 kunmap_atomic(start);
369}
370
371static void nfs4_test_and_free_stateid(struct nfs_server *server,
372 nfs4_stateid *stateid,
373 const struct cred *cred)
374{
375 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
376
377 ops->test_and_free_expired(server, stateid, cred);
378}
379
380static void __nfs4_free_revoked_stateid(struct nfs_server *server,
381 nfs4_stateid *stateid,
382 const struct cred *cred)
383{
384 stateid->type = NFS4_REVOKED_STATEID_TYPE;
385 nfs4_test_and_free_stateid(server, stateid, cred);
386}
387
388static void nfs4_free_revoked_stateid(struct nfs_server *server,
389 const nfs4_stateid *stateid,
390 const struct cred *cred)
391{
392 nfs4_stateid tmp;
393
394 nfs4_stateid_copy(&tmp, stateid);
395 __nfs4_free_revoked_stateid(server, &tmp, cred);
396}
397
398static long nfs4_update_delay(long *timeout)
399{
400 long ret;
401 if (!timeout)
402 return NFS4_POLL_RETRY_MAX;
403 if (*timeout <= 0)
404 *timeout = NFS4_POLL_RETRY_MIN;
405 if (*timeout > NFS4_POLL_RETRY_MAX)
406 *timeout = NFS4_POLL_RETRY_MAX;
407 ret = *timeout;
408 *timeout <<= 1;
409 return ret;
410}
411
412static int nfs4_delay_killable(long *timeout)
413{
414 might_sleep();
415
416 freezable_schedule_timeout_killable_unsafe(
417 nfs4_update_delay(timeout));
418 if (!__fatal_signal_pending(current))
419 return 0;
420 return -EINTR;
421}
422
423static int nfs4_delay_interruptible(long *timeout)
424{
425 might_sleep();
426
427 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout));
428 if (!signal_pending(current))
429 return 0;
430 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
431}
432
433static int nfs4_delay(long *timeout, bool interruptible)
434{
435 if (interruptible)
436 return nfs4_delay_interruptible(timeout);
437 return nfs4_delay_killable(timeout);
438}
439
440static const nfs4_stateid *
441nfs4_recoverable_stateid(const nfs4_stateid *stateid)
442{
443 if (!stateid)
444 return NULL;
445 switch (stateid->type) {
446 case NFS4_OPEN_STATEID_TYPE:
447 case NFS4_LOCK_STATEID_TYPE:
448 case NFS4_DELEGATION_STATEID_TYPE:
449 return stateid;
450 default:
451 break;
452 }
453 return NULL;
454}
455
456
457
458
459static int nfs4_do_handle_exception(struct nfs_server *server,
460 int errorcode, struct nfs4_exception *exception)
461{
462 struct nfs_client *clp = server->nfs_client;
463 struct nfs4_state *state = exception->state;
464 const nfs4_stateid *stateid;
465 struct inode *inode = exception->inode;
466 int ret = errorcode;
467
468 exception->delay = 0;
469 exception->recovering = 0;
470 exception->retry = 0;
471
472 stateid = nfs4_recoverable_stateid(exception->stateid);
473 if (stateid == NULL && state != NULL)
474 stateid = nfs4_recoverable_stateid(&state->stateid);
475
476 switch(errorcode) {
477 case 0:
478 return 0;
479 case -NFS4ERR_BADHANDLE:
480 case -ESTALE:
481 if (inode != NULL && S_ISREG(inode->i_mode))
482 pnfs_destroy_layout(NFS_I(inode));
483 break;
484 case -NFS4ERR_DELEG_REVOKED:
485 case -NFS4ERR_ADMIN_REVOKED:
486 case -NFS4ERR_EXPIRED:
487 case -NFS4ERR_BAD_STATEID:
488 case -NFS4ERR_PARTNER_NO_AUTH:
489 if (inode != NULL && stateid != NULL) {
490 nfs_inode_find_state_and_recover(inode,
491 stateid);
492 goto wait_on_recovery;
493 }
494 fallthrough;
495 case -NFS4ERR_OPENMODE:
496 if (inode) {
497 int err;
498
499 err = nfs_async_inode_return_delegation(inode,
500 stateid);
501 if (err == 0)
502 goto wait_on_recovery;
503 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
504 exception->retry = 1;
505 break;
506 }
507 }
508 if (state == NULL)
509 break;
510 ret = nfs4_schedule_stateid_recovery(server, state);
511 if (ret < 0)
512 break;
513 goto wait_on_recovery;
514 case -NFS4ERR_STALE_STATEID:
515 case -NFS4ERR_STALE_CLIENTID:
516 nfs4_schedule_lease_recovery(clp);
517 goto wait_on_recovery;
518 case -NFS4ERR_MOVED:
519 ret = nfs4_schedule_migration_recovery(server);
520 if (ret < 0)
521 break;
522 goto wait_on_recovery;
523 case -NFS4ERR_LEASE_MOVED:
524 nfs4_schedule_lease_moved_recovery(clp);
525 goto wait_on_recovery;
526#if defined(CONFIG_NFS_V4_1)
527 case -NFS4ERR_BADSESSION:
528 case -NFS4ERR_BADSLOT:
529 case -NFS4ERR_BAD_HIGH_SLOT:
530 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
531 case -NFS4ERR_DEADSESSION:
532 case -NFS4ERR_SEQ_FALSE_RETRY:
533 case -NFS4ERR_SEQ_MISORDERED:
534
535 goto wait_on_recovery;
536#endif
537 case -NFS4ERR_FILE_OPEN:
538 if (exception->timeout > HZ) {
539
540
541
542 ret = -EBUSY;
543 break;
544 }
545 fallthrough;
546 case -NFS4ERR_DELAY:
547 nfs_inc_server_stats(server, NFSIOS_DELAY);
548 fallthrough;
549 case -NFS4ERR_GRACE:
550 case -NFS4ERR_LAYOUTTRYLATER:
551 case -NFS4ERR_RECALLCONFLICT:
552 exception->delay = 1;
553 return 0;
554
555 case -NFS4ERR_RETRY_UNCACHED_REP:
556 case -NFS4ERR_OLD_STATEID:
557 exception->retry = 1;
558 break;
559 case -NFS4ERR_BADOWNER:
560
561 case -NFS4ERR_BADNAME:
562 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
563 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
564 exception->retry = 1;
565 printk(KERN_WARNING "NFS: v4 server %s "
566 "does not accept raw "
567 "uid/gids. "
568 "Reenabling the idmapper.\n",
569 server->nfs_client->cl_hostname);
570 }
571 }
572
573 return nfs4_map_errors(ret);
574wait_on_recovery:
575 exception->recovering = 1;
576 return 0;
577}
578
579
580
581
582int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
583{
584 struct nfs_client *clp = server->nfs_client;
585 int ret;
586
587 ret = nfs4_do_handle_exception(server, errorcode, exception);
588 if (exception->delay) {
589 ret = nfs4_delay(&exception->timeout,
590 exception->interruptible);
591 goto out_retry;
592 }
593 if (exception->recovering) {
594 ret = nfs4_wait_clnt_recover(clp);
595 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
596 return -EIO;
597 goto out_retry;
598 }
599 return ret;
600out_retry:
601 if (ret == 0)
602 exception->retry = 1;
603 return ret;
604}
605
606static int
607nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
608 int errorcode, struct nfs4_exception *exception)
609{
610 struct nfs_client *clp = server->nfs_client;
611 int ret;
612
613 ret = nfs4_do_handle_exception(server, errorcode, exception);
614 if (exception->delay) {
615 rpc_delay(task, nfs4_update_delay(&exception->timeout));
616 goto out_retry;
617 }
618 if (exception->recovering) {
619 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
620 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
621 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
622 goto out_retry;
623 }
624 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
625 ret = -EIO;
626 return ret;
627out_retry:
628 if (ret == 0) {
629 exception->retry = 1;
630
631
632
633
634 if (errorcode == -NFS4ERR_MOVED)
635 rpc_task_release_transport(task);
636 }
637 return ret;
638}
639
640int
641nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
642 struct nfs4_state *state, long *timeout)
643{
644 struct nfs4_exception exception = {
645 .state = state,
646 };
647
648 if (task->tk_status >= 0)
649 return 0;
650 if (timeout)
651 exception.timeout = *timeout;
652 task->tk_status = nfs4_async_handle_exception(task, server,
653 task->tk_status,
654 &exception);
655 if (exception.delay && timeout)
656 *timeout = exception.timeout;
657 if (exception.retry)
658 return -EAGAIN;
659 return 0;
660}
661
662
663
664
665
666static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
667{
668 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
669 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
670}
671
672static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
673{
674 spin_lock(&clp->cl_lock);
675 if (time_before(clp->cl_last_renewal,timestamp))
676 clp->cl_last_renewal = timestamp;
677 spin_unlock(&clp->cl_lock);
678}
679
680static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
681{
682 struct nfs_client *clp = server->nfs_client;
683
684 if (!nfs4_has_session(clp))
685 do_renew_lease(clp, timestamp);
686}
687
688struct nfs4_call_sync_data {
689 const struct nfs_server *seq_server;
690 struct nfs4_sequence_args *seq_args;
691 struct nfs4_sequence_res *seq_res;
692};
693
694void nfs4_init_sequence(struct nfs4_sequence_args *args,
695 struct nfs4_sequence_res *res, int cache_reply,
696 int privileged)
697{
698 args->sa_slot = NULL;
699 args->sa_cache_this = cache_reply;
700 args->sa_privileged = privileged;
701
702 res->sr_slot = NULL;
703}
704
705static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
706{
707 struct nfs4_slot *slot = res->sr_slot;
708 struct nfs4_slot_table *tbl;
709
710 tbl = slot->table;
711 spin_lock(&tbl->slot_tbl_lock);
712 if (!nfs41_wake_and_assign_slot(tbl, slot))
713 nfs4_free_slot(tbl, slot);
714 spin_unlock(&tbl->slot_tbl_lock);
715
716 res->sr_slot = NULL;
717}
718
719static int nfs40_sequence_done(struct rpc_task *task,
720 struct nfs4_sequence_res *res)
721{
722 if (res->sr_slot != NULL)
723 nfs40_sequence_free_slot(res);
724 return 1;
725}
726
727#if defined(CONFIG_NFS_V4_1)
728
729static void nfs41_release_slot(struct nfs4_slot *slot)
730{
731 struct nfs4_session *session;
732 struct nfs4_slot_table *tbl;
733 bool send_new_highest_used_slotid = false;
734
735 if (!slot)
736 return;
737 tbl = slot->table;
738 session = tbl->session;
739
740
741 if (slot->seq_done)
742 slot->seq_nr++;
743 slot->seq_done = 0;
744
745 spin_lock(&tbl->slot_tbl_lock);
746
747
748
749 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
750 send_new_highest_used_slotid = true;
751
752 if (nfs41_wake_and_assign_slot(tbl, slot)) {
753 send_new_highest_used_slotid = false;
754 goto out_unlock;
755 }
756 nfs4_free_slot(tbl, slot);
757
758 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
759 send_new_highest_used_slotid = false;
760out_unlock:
761 spin_unlock(&tbl->slot_tbl_lock);
762 if (send_new_highest_used_slotid)
763 nfs41_notify_server(session->clp);
764 if (waitqueue_active(&tbl->slot_waitq))
765 wake_up_all(&tbl->slot_waitq);
766}
767
768static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
769{
770 nfs41_release_slot(res->sr_slot);
771 res->sr_slot = NULL;
772}
773
774static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
775 u32 seqnr)
776{
777 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
778 slot->seq_nr_highest_sent = seqnr;
779}
780static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
781 u32 seqnr)
782{
783 slot->seq_nr_highest_sent = seqnr;
784 slot->seq_nr_last_acked = seqnr;
785}
786
787static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
788 struct nfs4_slot *slot)
789{
790 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
791 if (!IS_ERR(task))
792 rpc_put_task_async(task);
793}
794
795static int nfs41_sequence_process(struct rpc_task *task,
796 struct nfs4_sequence_res *res)
797{
798 struct nfs4_session *session;
799 struct nfs4_slot *slot = res->sr_slot;
800 struct nfs_client *clp;
801 int status;
802 int ret = 1;
803
804 if (slot == NULL)
805 goto out_noaction;
806
807 if (!RPC_WAS_SENT(task) || slot->seq_done)
808 goto out;
809
810 session = slot->table->session;
811 clp = session->clp;
812
813 trace_nfs4_sequence_done(session, res);
814
815 status = res->sr_status;
816 if (task->tk_status == -NFS4ERR_DEADSESSION)
817 status = -NFS4ERR_DEADSESSION;
818
819
820 switch (status) {
821 case 0:
822
823 nfs4_slot_sequence_acked(slot, slot->seq_nr);
824
825 slot->seq_done = 1;
826 do_renew_lease(clp, res->sr_timestamp);
827
828 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
829 !!slot->privileged);
830 nfs41_update_target_slotid(slot->table, slot, res);
831 break;
832 case 1:
833
834
835
836
837
838 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
839 slot->seq_done = 1;
840 goto out;
841 case -NFS4ERR_DELAY:
842
843
844
845
846 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
847 __func__,
848 slot->slot_nr,
849 slot->seq_nr);
850 nfs4_slot_sequence_acked(slot, slot->seq_nr);
851 goto out_retry;
852 case -NFS4ERR_RETRY_UNCACHED_REP:
853 case -NFS4ERR_SEQ_FALSE_RETRY:
854
855
856
857
858 nfs4_slot_sequence_acked(slot, slot->seq_nr);
859 goto retry_new_seq;
860 case -NFS4ERR_BADSLOT:
861
862
863
864
865 if (slot->slot_nr < slot->table->target_highest_slotid)
866 goto session_recover;
867 goto retry_nowait;
868 case -NFS4ERR_SEQ_MISORDERED:
869 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
870
871
872
873
874
875
876
877
878
879 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
880 slot->seq_nr--;
881 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
882 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
883 res->sr_slot = NULL;
884 }
885 goto retry_nowait;
886 }
887
888
889
890
891
892
893
894
895
896
897 slot->seq_nr = slot->seq_nr_highest_sent;
898 goto out_retry;
899 case -NFS4ERR_BADSESSION:
900 case -NFS4ERR_DEADSESSION:
901 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
902 goto session_recover;
903 default:
904
905 slot->seq_done = 1;
906 }
907out:
908
909 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
910out_noaction:
911 return ret;
912session_recover:
913 nfs4_schedule_session_recovery(session, status);
914 dprintk("%s ERROR: %d Reset session\n", __func__, status);
915 nfs41_sequence_free_slot(res);
916 goto out;
917retry_new_seq:
918 ++slot->seq_nr;
919retry_nowait:
920 if (rpc_restart_call_prepare(task)) {
921 nfs41_sequence_free_slot(res);
922 task->tk_status = 0;
923 ret = 0;
924 }
925 goto out;
926out_retry:
927 if (!rpc_restart_call(task))
928 goto out;
929 rpc_delay(task, NFS4_POLL_RETRY_MAX);
930 return 0;
931}
932
933int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
934{
935 if (!nfs41_sequence_process(task, res))
936 return 0;
937 if (res->sr_slot != NULL)
938 nfs41_sequence_free_slot(res);
939 return 1;
940
941}
942EXPORT_SYMBOL_GPL(nfs41_sequence_done);
943
944static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
945{
946 if (res->sr_slot == NULL)
947 return 1;
948 if (res->sr_slot->table->session != NULL)
949 return nfs41_sequence_process(task, res);
950 return nfs40_sequence_done(task, res);
951}
952
953static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
954{
955 if (res->sr_slot != NULL) {
956 if (res->sr_slot->table->session != NULL)
957 nfs41_sequence_free_slot(res);
958 else
959 nfs40_sequence_free_slot(res);
960 }
961}
962
963int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
964{
965 if (res->sr_slot == NULL)
966 return 1;
967 if (!res->sr_slot->table->session)
968 return nfs40_sequence_done(task, res);
969 return nfs41_sequence_done(task, res);
970}
971EXPORT_SYMBOL_GPL(nfs4_sequence_done);
972
973static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
974{
975 struct nfs4_call_sync_data *data = calldata;
976
977 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
978
979 nfs4_setup_sequence(data->seq_server->nfs_client,
980 data->seq_args, data->seq_res, task);
981}
982
983static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
984{
985 struct nfs4_call_sync_data *data = calldata;
986
987 nfs41_sequence_done(task, data->seq_res);
988}
989
990static const struct rpc_call_ops nfs41_call_sync_ops = {
991 .rpc_call_prepare = nfs41_call_sync_prepare,
992 .rpc_call_done = nfs41_call_sync_done,
993};
994
995#else
996
997static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
998{
999 return nfs40_sequence_done(task, res);
1000}
1001
1002static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1003{
1004 if (res->sr_slot != NULL)
1005 nfs40_sequence_free_slot(res);
1006}
1007
1008int nfs4_sequence_done(struct rpc_task *task,
1009 struct nfs4_sequence_res *res)
1010{
1011 return nfs40_sequence_done(task, res);
1012}
1013EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1014
1015#endif
1016
1017static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1018{
1019 res->sr_timestamp = jiffies;
1020 res->sr_status_flags = 0;
1021 res->sr_status = 1;
1022}
1023
1024static
1025void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1026 struct nfs4_sequence_res *res,
1027 struct nfs4_slot *slot)
1028{
1029 if (!slot)
1030 return;
1031 slot->privileged = args->sa_privileged ? 1 : 0;
1032 args->sa_slot = slot;
1033
1034 res->sr_slot = slot;
1035}
1036
1037int nfs4_setup_sequence(struct nfs_client *client,
1038 struct nfs4_sequence_args *args,
1039 struct nfs4_sequence_res *res,
1040 struct rpc_task *task)
1041{
1042 struct nfs4_session *session = nfs4_get_session(client);
1043 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
1044 struct nfs4_slot *slot;
1045
1046
1047 if (res->sr_slot != NULL)
1048 goto out_start;
1049
1050 if (session)
1051 tbl = &session->fc_slot_table;
1052
1053 spin_lock(&tbl->slot_tbl_lock);
1054
1055 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1056 goto out_sleep;
1057
1058 slot = nfs4_alloc_slot(tbl);
1059 if (IS_ERR(slot)) {
1060 if (slot == ERR_PTR(-ENOMEM))
1061 goto out_sleep_timeout;
1062 goto out_sleep;
1063 }
1064 spin_unlock(&tbl->slot_tbl_lock);
1065
1066 nfs4_sequence_attach_slot(args, res, slot);
1067
1068 trace_nfs4_setup_sequence(session, args);
1069out_start:
1070 nfs41_sequence_res_init(res);
1071 rpc_call_start(task);
1072 return 0;
1073out_sleep_timeout:
1074
1075 if (args->sa_privileged)
1076 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1077 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1078 else
1079 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1080 NULL, jiffies + (HZ >> 2));
1081 spin_unlock(&tbl->slot_tbl_lock);
1082 return -EAGAIN;
1083out_sleep:
1084 if (args->sa_privileged)
1085 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
1086 RPC_PRIORITY_PRIVILEGED);
1087 else
1088 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1089 spin_unlock(&tbl->slot_tbl_lock);
1090 return -EAGAIN;
1091}
1092EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1093
1094static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1095{
1096 struct nfs4_call_sync_data *data = calldata;
1097 nfs4_setup_sequence(data->seq_server->nfs_client,
1098 data->seq_args, data->seq_res, task);
1099}
1100
1101static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1102{
1103 struct nfs4_call_sync_data *data = calldata;
1104 nfs4_sequence_done(task, data->seq_res);
1105}
1106
1107static const struct rpc_call_ops nfs40_call_sync_ops = {
1108 .rpc_call_prepare = nfs40_call_sync_prepare,
1109 .rpc_call_done = nfs40_call_sync_done,
1110};
1111
1112static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1113{
1114 int ret;
1115 struct rpc_task *task;
1116
1117 task = rpc_run_task(task_setup);
1118 if (IS_ERR(task))
1119 return PTR_ERR(task);
1120
1121 ret = task->tk_status;
1122 rpc_put_task(task);
1123 return ret;
1124}
1125
1126static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1127 struct nfs_server *server,
1128 struct rpc_message *msg,
1129 struct nfs4_sequence_args *args,
1130 struct nfs4_sequence_res *res,
1131 unsigned short task_flags)
1132{
1133 struct nfs_client *clp = server->nfs_client;
1134 struct nfs4_call_sync_data data = {
1135 .seq_server = server,
1136 .seq_args = args,
1137 .seq_res = res,
1138 };
1139 struct rpc_task_setup task_setup = {
1140 .rpc_client = clnt,
1141 .rpc_message = msg,
1142 .callback_ops = clp->cl_mvops->call_sync_ops,
1143 .callback_data = &data,
1144 .flags = task_flags,
1145 };
1146
1147 return nfs4_call_sync_custom(&task_setup);
1148}
1149
1150static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1151 struct nfs_server *server,
1152 struct rpc_message *msg,
1153 struct nfs4_sequence_args *args,
1154 struct nfs4_sequence_res *res)
1155{
1156 return nfs4_do_call_sync(clnt, server, msg, args, res, 0);
1157}
1158
1159
1160int nfs4_call_sync(struct rpc_clnt *clnt,
1161 struct nfs_server *server,
1162 struct rpc_message *msg,
1163 struct nfs4_sequence_args *args,
1164 struct nfs4_sequence_res *res,
1165 int cache_reply)
1166{
1167 nfs4_init_sequence(args, res, cache_reply, 0);
1168 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1169}
1170
1171static void
1172nfs4_inc_nlink_locked(struct inode *inode)
1173{
1174 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1175 inc_nlink(inode);
1176}
1177
1178static void
1179nfs4_dec_nlink_locked(struct inode *inode)
1180{
1181 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1182 drop_nlink(inode);
1183}
1184
1185static void
1186nfs4_update_changeattr_locked(struct inode *inode,
1187 struct nfs4_change_info *cinfo,
1188 unsigned long timestamp, unsigned long cache_validity)
1189{
1190 struct nfs_inode *nfsi = NFS_I(inode);
1191
1192 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1193 | NFS_INO_INVALID_MTIME
1194 | cache_validity;
1195
1196 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(inode)) {
1197 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1198 nfsi->attrtimeo_timestamp = jiffies;
1199 } else {
1200 if (S_ISDIR(inode->i_mode)) {
1201 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1202 nfs_force_lookup_revalidate(inode);
1203 } else {
1204 if (!NFS_PROTO(inode)->have_delegation(inode,
1205 FMODE_READ))
1206 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1207 }
1208
1209 if (cinfo->before != inode_peek_iversion_raw(inode))
1210 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1211 NFS_INO_INVALID_ACL |
1212 NFS_INO_INVALID_XATTR;
1213 }
1214 inode_set_iversion_raw(inode, cinfo->after);
1215 nfsi->read_cache_jiffies = timestamp;
1216 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1217 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1218
1219 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1220 nfs_fscache_invalidate(inode);
1221}
1222
1223void
1224nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1225 unsigned long timestamp, unsigned long cache_validity)
1226{
1227 spin_lock(&dir->i_lock);
1228 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
1229 spin_unlock(&dir->i_lock);
1230}
1231
1232struct nfs4_open_createattrs {
1233 struct nfs4_label *label;
1234 struct iattr *sattr;
1235 const __u32 verf[2];
1236};
1237
1238static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1239 int err, struct nfs4_exception *exception)
1240{
1241 if (err != -EINVAL)
1242 return false;
1243 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1244 return false;
1245 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1246 exception->retry = 1;
1247 return true;
1248}
1249
1250static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1251{
1252 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1253}
1254
1255static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1256{
1257 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1258
1259 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1260}
1261
1262static u32
1263nfs4_map_atomic_open_share(struct nfs_server *server,
1264 fmode_t fmode, int openflags)
1265{
1266 u32 res = 0;
1267
1268 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1269 case FMODE_READ:
1270 res = NFS4_SHARE_ACCESS_READ;
1271 break;
1272 case FMODE_WRITE:
1273 res = NFS4_SHARE_ACCESS_WRITE;
1274 break;
1275 case FMODE_READ|FMODE_WRITE:
1276 res = NFS4_SHARE_ACCESS_BOTH;
1277 }
1278 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1279 goto out;
1280
1281 if (openflags & O_DIRECT)
1282 res |= NFS4_SHARE_WANT_NO_DELEG;
1283out:
1284 return res;
1285}
1286
1287static enum open_claim_type4
1288nfs4_map_atomic_open_claim(struct nfs_server *server,
1289 enum open_claim_type4 claim)
1290{
1291 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1292 return claim;
1293 switch (claim) {
1294 default:
1295 return claim;
1296 case NFS4_OPEN_CLAIM_FH:
1297 return NFS4_OPEN_CLAIM_NULL;
1298 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1299 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1300 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1301 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1302 }
1303}
1304
1305static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1306{
1307 p->o_res.f_attr = &p->f_attr;
1308 p->o_res.f_label = p->f_label;
1309 p->o_res.seqid = p->o_arg.seqid;
1310 p->c_res.seqid = p->c_arg.seqid;
1311 p->o_res.server = p->o_arg.server;
1312 p->o_res.access_request = p->o_arg.access;
1313 nfs_fattr_init(&p->f_attr);
1314 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1315}
1316
1317static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1318 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1319 const struct nfs4_open_createattrs *c,
1320 enum open_claim_type4 claim,
1321 gfp_t gfp_mask)
1322{
1323 struct dentry *parent = dget_parent(dentry);
1324 struct inode *dir = d_inode(parent);
1325 struct nfs_server *server = NFS_SERVER(dir);
1326 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1327 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1328 struct nfs4_opendata *p;
1329
1330 p = kzalloc(sizeof(*p), gfp_mask);
1331 if (p == NULL)
1332 goto err;
1333
1334 p->f_label = nfs4_label_alloc(server, gfp_mask);
1335 if (IS_ERR(p->f_label))
1336 goto err_free_p;
1337
1338 p->a_label = nfs4_label_alloc(server, gfp_mask);
1339 if (IS_ERR(p->a_label))
1340 goto err_free_f;
1341
1342 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1343 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1344 if (IS_ERR(p->o_arg.seqid))
1345 goto err_free_label;
1346 nfs_sb_active(dentry->d_sb);
1347 p->dentry = dget(dentry);
1348 p->dir = parent;
1349 p->owner = sp;
1350 atomic_inc(&sp->so_count);
1351 p->o_arg.open_flags = flags;
1352 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1353 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1354 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1355 fmode, flags);
1356 if (flags & O_CREAT) {
1357 p->o_arg.umask = current_umask();
1358 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1359 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1360 p->o_arg.u.attrs = &p->attrs;
1361 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1362
1363 memcpy(p->o_arg.u.verifier.data, c->verf,
1364 sizeof(p->o_arg.u.verifier.data));
1365 }
1366 }
1367
1368
1369 if (!(flags & O_EXCL)) {
1370
1371
1372 switch (p->o_arg.claim) {
1373 default:
1374 break;
1375 case NFS4_OPEN_CLAIM_NULL:
1376 case NFS4_OPEN_CLAIM_FH:
1377 p->o_arg.access = NFS4_ACCESS_READ |
1378 NFS4_ACCESS_MODIFY |
1379 NFS4_ACCESS_EXTEND |
1380 NFS4_ACCESS_EXECUTE;
1381#ifdef CONFIG_NFS_V4_2
1382 if (server->caps & NFS_CAP_XATTR)
1383 p->o_arg.access |= NFS4_ACCESS_XAREAD |
1384 NFS4_ACCESS_XAWRITE |
1385 NFS4_ACCESS_XALIST;
1386#endif
1387 }
1388 }
1389 p->o_arg.clientid = server->nfs_client->cl_clientid;
1390 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1391 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1392 p->o_arg.name = &dentry->d_name;
1393 p->o_arg.server = server;
1394 p->o_arg.bitmask = nfs4_bitmask(server, label);
1395 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1396 switch (p->o_arg.claim) {
1397 case NFS4_OPEN_CLAIM_NULL:
1398 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1399 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1400 p->o_arg.fh = NFS_FH(dir);
1401 break;
1402 case NFS4_OPEN_CLAIM_PREVIOUS:
1403 case NFS4_OPEN_CLAIM_FH:
1404 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1405 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1406 p->o_arg.fh = NFS_FH(d_inode(dentry));
1407 }
1408 p->c_arg.fh = &p->o_res.fh;
1409 p->c_arg.stateid = &p->o_res.stateid;
1410 p->c_arg.seqid = p->o_arg.seqid;
1411 nfs4_init_opendata_res(p);
1412 kref_init(&p->kref);
1413 return p;
1414
1415err_free_label:
1416 nfs4_label_free(p->a_label);
1417err_free_f:
1418 nfs4_label_free(p->f_label);
1419err_free_p:
1420 kfree(p);
1421err:
1422 dput(parent);
1423 return NULL;
1424}
1425
1426static void nfs4_opendata_free(struct kref *kref)
1427{
1428 struct nfs4_opendata *p = container_of(kref,
1429 struct nfs4_opendata, kref);
1430 struct super_block *sb = p->dentry->d_sb;
1431
1432 nfs4_lgopen_release(p->lgp);
1433 nfs_free_seqid(p->o_arg.seqid);
1434 nfs4_sequence_free_slot(&p->o_res.seq_res);
1435 if (p->state != NULL)
1436 nfs4_put_open_state(p->state);
1437 nfs4_put_state_owner(p->owner);
1438
1439 nfs4_label_free(p->a_label);
1440 nfs4_label_free(p->f_label);
1441
1442 dput(p->dir);
1443 dput(p->dentry);
1444 nfs_sb_deactive(sb);
1445 nfs_fattr_free_names(&p->f_attr);
1446 kfree(p->f_attr.mdsthreshold);
1447 kfree(p);
1448}
1449
1450static void nfs4_opendata_put(struct nfs4_opendata *p)
1451{
1452 if (p != NULL)
1453 kref_put(&p->kref, nfs4_opendata_free);
1454}
1455
1456static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1457 fmode_t fmode)
1458{
1459 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1460 case FMODE_READ|FMODE_WRITE:
1461 return state->n_rdwr != 0;
1462 case FMODE_WRITE:
1463 return state->n_wronly != 0;
1464 case FMODE_READ:
1465 return state->n_rdonly != 0;
1466 }
1467 WARN_ON_ONCE(1);
1468 return false;
1469}
1470
1471static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1472 int open_mode, enum open_claim_type4 claim)
1473{
1474 int ret = 0;
1475
1476 if (open_mode & (O_EXCL|O_TRUNC))
1477 goto out;
1478 switch (claim) {
1479 case NFS4_OPEN_CLAIM_NULL:
1480 case NFS4_OPEN_CLAIM_FH:
1481 goto out;
1482 default:
1483 break;
1484 }
1485 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1486 case FMODE_READ:
1487 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1488 && state->n_rdonly != 0;
1489 break;
1490 case FMODE_WRITE:
1491 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1492 && state->n_wronly != 0;
1493 break;
1494 case FMODE_READ|FMODE_WRITE:
1495 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1496 && state->n_rdwr != 0;
1497 }
1498out:
1499 return ret;
1500}
1501
1502static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1503 enum open_claim_type4 claim)
1504{
1505 if (delegation == NULL)
1506 return 0;
1507 if ((delegation->type & fmode) != fmode)
1508 return 0;
1509 switch (claim) {
1510 case NFS4_OPEN_CLAIM_NULL:
1511 case NFS4_OPEN_CLAIM_FH:
1512 break;
1513 case NFS4_OPEN_CLAIM_PREVIOUS:
1514 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1515 break;
1516 fallthrough;
1517 default:
1518 return 0;
1519 }
1520 nfs_mark_delegation_referenced(delegation);
1521 return 1;
1522}
1523
1524static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1525{
1526 switch (fmode) {
1527 case FMODE_WRITE:
1528 state->n_wronly++;
1529 break;
1530 case FMODE_READ:
1531 state->n_rdonly++;
1532 break;
1533 case FMODE_READ|FMODE_WRITE:
1534 state->n_rdwr++;
1535 }
1536 nfs4_state_set_mode_locked(state, state->state | fmode);
1537}
1538
1539#ifdef CONFIG_NFS_V4_1
1540static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1541{
1542 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1543 return true;
1544 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1545 return true;
1546 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1547 return true;
1548 return false;
1549}
1550#endif
1551
1552static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1553{
1554 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1555 wake_up_all(&state->waitq);
1556}
1557
1558static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1559{
1560 struct nfs_client *clp = state->owner->so_server->nfs_client;
1561 bool need_recover = false;
1562
1563 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1564 need_recover = true;
1565 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1566 need_recover = true;
1567 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1568 need_recover = true;
1569 if (need_recover)
1570 nfs4_state_mark_reclaim_nograce(clp, state);
1571}
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583static bool nfs_stateid_is_sequential(struct nfs4_state *state,
1584 const nfs4_stateid *stateid)
1585{
1586 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1587
1588 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1589 nfs4_stateid_is_next(&state->open_stateid, stateid)) {
1590 return true;
1591 }
1592 } else {
1593
1594 if (stateid->seqid == cpu_to_be32(1))
1595 return true;
1596 }
1597 return false;
1598}
1599
1600static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1601{
1602 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1603 return;
1604 if (state->n_wronly)
1605 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1606 if (state->n_rdonly)
1607 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1608 if (state->n_rdwr)
1609 set_bit(NFS_O_RDWR_STATE, &state->flags);
1610 set_bit(NFS_OPEN_STATE, &state->flags);
1611}
1612
1613static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1614 nfs4_stateid *stateid, fmode_t fmode)
1615{
1616 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1617 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1618 case FMODE_WRITE:
1619 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1620 break;
1621 case FMODE_READ:
1622 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1623 break;
1624 case 0:
1625 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1626 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1627 clear_bit(NFS_OPEN_STATE, &state->flags);
1628 }
1629 if (stateid == NULL)
1630 return;
1631
1632 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1633 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1634 nfs_resync_open_stateid_locked(state);
1635 goto out;
1636 }
1637 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1638 nfs4_stateid_copy(&state->stateid, stateid);
1639 nfs4_stateid_copy(&state->open_stateid, stateid);
1640 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1641out:
1642 nfs_state_log_update_open_stateid(state);
1643}
1644
1645static void nfs_clear_open_stateid(struct nfs4_state *state,
1646 nfs4_stateid *arg_stateid,
1647 nfs4_stateid *stateid, fmode_t fmode)
1648{
1649 write_seqlock(&state->seqlock);
1650
1651 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1652 nfs_clear_open_stateid_locked(state, stateid, fmode);
1653 write_sequnlock(&state->seqlock);
1654 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1655 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1656}
1657
1658static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1659 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1660 __must_hold(&state->owner->so_lock)
1661 __must_hold(&state->seqlock)
1662 __must_hold(RCU)
1663
1664{
1665 DEFINE_WAIT(wait);
1666 int status = 0;
1667 for (;;) {
1668
1669 if (nfs_stateid_is_sequential(state, stateid))
1670 break;
1671
1672 if (status)
1673 break;
1674
1675 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1676 break;
1677
1678 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1679 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1680
1681
1682
1683
1684
1685 write_sequnlock(&state->seqlock);
1686 spin_unlock(&state->owner->so_lock);
1687 rcu_read_unlock();
1688 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1689
1690 if (!signal_pending(current)) {
1691 if (schedule_timeout(5*HZ) == 0)
1692 status = -EAGAIN;
1693 else
1694 status = 0;
1695 } else
1696 status = -EINTR;
1697 finish_wait(&state->waitq, &wait);
1698 rcu_read_lock();
1699 spin_lock(&state->owner->so_lock);
1700 write_seqlock(&state->seqlock);
1701 }
1702
1703 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1704 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1705 nfs4_stateid_copy(freeme, &state->open_stateid);
1706 nfs_test_and_clear_all_open_stateid(state);
1707 }
1708
1709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1710 nfs4_stateid_copy(&state->stateid, stateid);
1711 nfs4_stateid_copy(&state->open_stateid, stateid);
1712 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1713 nfs_state_log_update_open_stateid(state);
1714}
1715
1716static void nfs_state_set_open_stateid(struct nfs4_state *state,
1717 const nfs4_stateid *open_stateid,
1718 fmode_t fmode,
1719 nfs4_stateid *freeme)
1720{
1721
1722
1723
1724
1725 write_seqlock(&state->seqlock);
1726 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1727 switch (fmode) {
1728 case FMODE_READ:
1729 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1730 break;
1731 case FMODE_WRITE:
1732 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1733 break;
1734 case FMODE_READ|FMODE_WRITE:
1735 set_bit(NFS_O_RDWR_STATE, &state->flags);
1736 }
1737 set_bit(NFS_OPEN_STATE, &state->flags);
1738 write_sequnlock(&state->seqlock);
1739}
1740
1741static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1742{
1743 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1744 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1745 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1746 clear_bit(NFS_OPEN_STATE, &state->flags);
1747}
1748
1749static void nfs_state_set_delegation(struct nfs4_state *state,
1750 const nfs4_stateid *deleg_stateid,
1751 fmode_t fmode)
1752{
1753
1754
1755
1756
1757 write_seqlock(&state->seqlock);
1758 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1759 set_bit(NFS_DELEGATED_STATE, &state->flags);
1760 write_sequnlock(&state->seqlock);
1761}
1762
1763static void nfs_state_clear_delegation(struct nfs4_state *state)
1764{
1765 write_seqlock(&state->seqlock);
1766 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1767 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1768 write_sequnlock(&state->seqlock);
1769}
1770
1771int update_open_stateid(struct nfs4_state *state,
1772 const nfs4_stateid *open_stateid,
1773 const nfs4_stateid *delegation,
1774 fmode_t fmode)
1775{
1776 struct nfs_server *server = NFS_SERVER(state->inode);
1777 struct nfs_client *clp = server->nfs_client;
1778 struct nfs_inode *nfsi = NFS_I(state->inode);
1779 struct nfs_delegation *deleg_cur;
1780 nfs4_stateid freeme = { };
1781 int ret = 0;
1782
1783 fmode &= (FMODE_READ|FMODE_WRITE);
1784
1785 rcu_read_lock();
1786 spin_lock(&state->owner->so_lock);
1787 if (open_stateid != NULL) {
1788 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1789 ret = 1;
1790 }
1791
1792 deleg_cur = nfs4_get_valid_delegation(state->inode);
1793 if (deleg_cur == NULL)
1794 goto no_delegation;
1795
1796 spin_lock(&deleg_cur->lock);
1797 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1798 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1799 (deleg_cur->type & fmode) != fmode)
1800 goto no_delegation_unlock;
1801
1802 if (delegation == NULL)
1803 delegation = &deleg_cur->stateid;
1804 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
1805 goto no_delegation_unlock;
1806
1807 nfs_mark_delegation_referenced(deleg_cur);
1808 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1809 ret = 1;
1810no_delegation_unlock:
1811 spin_unlock(&deleg_cur->lock);
1812no_delegation:
1813 if (ret)
1814 update_open_stateflags(state, fmode);
1815 spin_unlock(&state->owner->so_lock);
1816 rcu_read_unlock();
1817
1818 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1819 nfs4_schedule_state_manager(clp);
1820 if (freeme.type != 0)
1821 nfs4_test_and_free_stateid(server, &freeme,
1822 state->owner->so_cred);
1823
1824 return ret;
1825}
1826
1827static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1828 const nfs4_stateid *stateid)
1829{
1830 struct nfs4_state *state = lsp->ls_state;
1831 bool ret = false;
1832
1833 spin_lock(&state->state_lock);
1834 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1835 goto out_noupdate;
1836 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1837 goto out_noupdate;
1838 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1839 ret = true;
1840out_noupdate:
1841 spin_unlock(&state->state_lock);
1842 return ret;
1843}
1844
1845static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1846{
1847 struct nfs_delegation *delegation;
1848
1849 fmode &= FMODE_READ|FMODE_WRITE;
1850 rcu_read_lock();
1851 delegation = nfs4_get_valid_delegation(inode);
1852 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1853 rcu_read_unlock();
1854 return;
1855 }
1856 rcu_read_unlock();
1857 nfs4_inode_return_delegation(inode);
1858}
1859
1860static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1861{
1862 struct nfs4_state *state = opendata->state;
1863 struct nfs_delegation *delegation;
1864 int open_mode = opendata->o_arg.open_flags;
1865 fmode_t fmode = opendata->o_arg.fmode;
1866 enum open_claim_type4 claim = opendata->o_arg.claim;
1867 nfs4_stateid stateid;
1868 int ret = -EAGAIN;
1869
1870 for (;;) {
1871 spin_lock(&state->owner->so_lock);
1872 if (can_open_cached(state, fmode, open_mode, claim)) {
1873 update_open_stateflags(state, fmode);
1874 spin_unlock(&state->owner->so_lock);
1875 goto out_return_state;
1876 }
1877 spin_unlock(&state->owner->so_lock);
1878 rcu_read_lock();
1879 delegation = nfs4_get_valid_delegation(state->inode);
1880 if (!can_open_delegated(delegation, fmode, claim)) {
1881 rcu_read_unlock();
1882 break;
1883 }
1884
1885 nfs4_stateid_copy(&stateid, &delegation->stateid);
1886 rcu_read_unlock();
1887 nfs_release_seqid(opendata->o_arg.seqid);
1888 if (!opendata->is_recover) {
1889 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1890 if (ret != 0)
1891 goto out;
1892 }
1893 ret = -EAGAIN;
1894
1895
1896 if (update_open_stateid(state, NULL, &stateid, fmode))
1897 goto out_return_state;
1898 }
1899out:
1900 return ERR_PTR(ret);
1901out_return_state:
1902 refcount_inc(&state->count);
1903 return state;
1904}
1905
1906static void
1907nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1908{
1909 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1910 struct nfs_delegation *delegation;
1911 int delegation_flags = 0;
1912
1913 rcu_read_lock();
1914 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1915 if (delegation)
1916 delegation_flags = delegation->flags;
1917 rcu_read_unlock();
1918 switch (data->o_arg.claim) {
1919 default:
1920 break;
1921 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1922 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1923 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1924 "returning a delegation for "
1925 "OPEN(CLAIM_DELEGATE_CUR)\n",
1926 clp->cl_hostname);
1927 return;
1928 }
1929 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1930 nfs_inode_set_delegation(state->inode,
1931 data->owner->so_cred,
1932 data->o_res.delegation_type,
1933 &data->o_res.delegation,
1934 data->o_res.pagemod_limit);
1935 else
1936 nfs_inode_reclaim_delegation(state->inode,
1937 data->owner->so_cred,
1938 data->o_res.delegation_type,
1939 &data->o_res.delegation,
1940 data->o_res.pagemod_limit);
1941
1942 if (data->o_res.do_recall)
1943 nfs_async_inode_return_delegation(state->inode,
1944 &data->o_res.delegation);
1945}
1946
1947
1948
1949
1950
1951static struct nfs4_state *
1952_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1953{
1954 struct inode *inode = data->state->inode;
1955 struct nfs4_state *state = data->state;
1956 int ret;
1957
1958 if (!data->rpc_done) {
1959 if (data->rpc_status)
1960 return ERR_PTR(data->rpc_status);
1961
1962 goto update;
1963 }
1964
1965 ret = nfs_refresh_inode(inode, &data->f_attr);
1966 if (ret)
1967 return ERR_PTR(ret);
1968
1969 if (data->o_res.delegation_type != 0)
1970 nfs4_opendata_check_deleg(data, state);
1971update:
1972 if (!update_open_stateid(state, &data->o_res.stateid,
1973 NULL, data->o_arg.fmode))
1974 return ERR_PTR(-EAGAIN);
1975 refcount_inc(&state->count);
1976
1977 return state;
1978}
1979
1980static struct inode *
1981nfs4_opendata_get_inode(struct nfs4_opendata *data)
1982{
1983 struct inode *inode;
1984
1985 switch (data->o_arg.claim) {
1986 case NFS4_OPEN_CLAIM_NULL:
1987 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1988 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1989 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1990 return ERR_PTR(-EAGAIN);
1991 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1992 &data->f_attr, data->f_label);
1993 break;
1994 default:
1995 inode = d_inode(data->dentry);
1996 ihold(inode);
1997 nfs_refresh_inode(inode, &data->f_attr);
1998 }
1999 return inode;
2000}
2001
2002static struct nfs4_state *
2003nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
2004{
2005 struct nfs4_state *state;
2006 struct inode *inode;
2007
2008 inode = nfs4_opendata_get_inode(data);
2009 if (IS_ERR(inode))
2010 return ERR_CAST(inode);
2011 if (data->state != NULL && data->state->inode == inode) {
2012 state = data->state;
2013 refcount_inc(&state->count);
2014 } else
2015 state = nfs4_get_open_state(inode, data->owner);
2016 iput(inode);
2017 if (state == NULL)
2018 state = ERR_PTR(-ENOMEM);
2019 return state;
2020}
2021
2022static struct nfs4_state *
2023_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2024{
2025 struct nfs4_state *state;
2026
2027 if (!data->rpc_done) {
2028 state = nfs4_try_open_cached(data);
2029 trace_nfs4_cached_open(data->state);
2030 goto out;
2031 }
2032
2033 state = nfs4_opendata_find_nfs4_state(data);
2034 if (IS_ERR(state))
2035 goto out;
2036
2037 if (data->o_res.delegation_type != 0)
2038 nfs4_opendata_check_deleg(data, state);
2039 if (!update_open_stateid(state, &data->o_res.stateid,
2040 NULL, data->o_arg.fmode)) {
2041 nfs4_put_open_state(state);
2042 state = ERR_PTR(-EAGAIN);
2043 }
2044out:
2045 nfs_release_seqid(data->o_arg.seqid);
2046 return state;
2047}
2048
2049static struct nfs4_state *
2050nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2051{
2052 struct nfs4_state *ret;
2053
2054 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2055 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2056 else
2057 ret = _nfs4_opendata_to_nfs4_state(data);
2058 nfs4_sequence_free_slot(&data->o_res.seq_res);
2059 return ret;
2060}
2061
2062static struct nfs_open_context *
2063nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
2064{
2065 struct nfs_inode *nfsi = NFS_I(state->inode);
2066 struct nfs_open_context *ctx;
2067
2068 rcu_read_lock();
2069 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
2070 if (ctx->state != state)
2071 continue;
2072 if ((ctx->mode & mode) != mode)
2073 continue;
2074 if (!get_nfs_open_context(ctx))
2075 continue;
2076 rcu_read_unlock();
2077 return ctx;
2078 }
2079 rcu_read_unlock();
2080 return ERR_PTR(-ENOENT);
2081}
2082
2083static struct nfs_open_context *
2084nfs4_state_find_open_context(struct nfs4_state *state)
2085{
2086 struct nfs_open_context *ctx;
2087
2088 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2089 if (!IS_ERR(ctx))
2090 return ctx;
2091 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2092 if (!IS_ERR(ctx))
2093 return ctx;
2094 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2095}
2096
2097static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2098 struct nfs4_state *state, enum open_claim_type4 claim)
2099{
2100 struct nfs4_opendata *opendata;
2101
2102 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
2103 NULL, claim, GFP_NOFS);
2104 if (opendata == NULL)
2105 return ERR_PTR(-ENOMEM);
2106 opendata->state = state;
2107 refcount_inc(&state->count);
2108 return opendata;
2109}
2110
2111static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2112 fmode_t fmode)
2113{
2114 struct nfs4_state *newstate;
2115 int ret;
2116
2117 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
2118 return 0;
2119 opendata->o_arg.open_flags = 0;
2120 opendata->o_arg.fmode = fmode;
2121 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2122 NFS_SB(opendata->dentry->d_sb),
2123 fmode, 0);
2124 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2125 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2126 nfs4_init_opendata_res(opendata);
2127 ret = _nfs4_recover_proc_open(opendata);
2128 if (ret != 0)
2129 return ret;
2130 newstate = nfs4_opendata_to_nfs4_state(opendata);
2131 if (IS_ERR(newstate))
2132 return PTR_ERR(newstate);
2133 if (newstate != opendata->state)
2134 ret = -ESTALE;
2135 nfs4_close_state(newstate, fmode);
2136 return ret;
2137}
2138
2139static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2140{
2141 int ret;
2142
2143
2144 smp_rmb();
2145 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2146 if (ret != 0)
2147 return ret;
2148 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2149 if (ret != 0)
2150 return ret;
2151 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2152 if (ret != 0)
2153 return ret;
2154
2155
2156
2157
2158 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
2159 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
2160 write_seqlock(&state->seqlock);
2161 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2162 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2163 write_sequnlock(&state->seqlock);
2164 }
2165 return 0;
2166}
2167
2168
2169
2170
2171
2172static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2173{
2174 struct nfs_delegation *delegation;
2175 struct nfs4_opendata *opendata;
2176 fmode_t delegation_type = 0;
2177 int status;
2178
2179 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2180 NFS4_OPEN_CLAIM_PREVIOUS);
2181 if (IS_ERR(opendata))
2182 return PTR_ERR(opendata);
2183 rcu_read_lock();
2184 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2185 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
2186 delegation_type = delegation->type;
2187 rcu_read_unlock();
2188 opendata->o_arg.u.delegation_type = delegation_type;
2189 status = nfs4_open_recover(opendata, state);
2190 nfs4_opendata_put(opendata);
2191 return status;
2192}
2193
2194static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2195{
2196 struct nfs_server *server = NFS_SERVER(state->inode);
2197 struct nfs4_exception exception = { };
2198 int err;
2199 do {
2200 err = _nfs4_do_open_reclaim(ctx, state);
2201 trace_nfs4_open_reclaim(ctx, 0, err);
2202 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2203 continue;
2204 if (err != -NFS4ERR_DELAY)
2205 break;
2206 nfs4_handle_exception(server, err, &exception);
2207 } while (exception.retry);
2208 return err;
2209}
2210
2211static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2212{
2213 struct nfs_open_context *ctx;
2214 int ret;
2215
2216 ctx = nfs4_state_find_open_context(state);
2217 if (IS_ERR(ctx))
2218 return -EAGAIN;
2219 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2220 nfs_state_clear_open_state_flags(state);
2221 ret = nfs4_do_open_reclaim(ctx, state);
2222 put_nfs_open_context(ctx);
2223 return ret;
2224}
2225
2226static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
2227{
2228 switch (err) {
2229 default:
2230 printk(KERN_ERR "NFS: %s: unhandled error "
2231 "%d.\n", __func__, err);
2232 case 0:
2233 case -ENOENT:
2234 case -EAGAIN:
2235 case -ESTALE:
2236 case -ETIMEDOUT:
2237 break;
2238 case -NFS4ERR_BADSESSION:
2239 case -NFS4ERR_BADSLOT:
2240 case -NFS4ERR_BAD_HIGH_SLOT:
2241 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2242 case -NFS4ERR_DEADSESSION:
2243 return -EAGAIN;
2244 case -NFS4ERR_STALE_CLIENTID:
2245 case -NFS4ERR_STALE_STATEID:
2246
2247 nfs4_schedule_lease_recovery(server->nfs_client);
2248 return -EAGAIN;
2249 case -NFS4ERR_MOVED:
2250 nfs4_schedule_migration_recovery(server);
2251 return -EAGAIN;
2252 case -NFS4ERR_LEASE_MOVED:
2253 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2254 return -EAGAIN;
2255 case -NFS4ERR_DELEG_REVOKED:
2256 case -NFS4ERR_ADMIN_REVOKED:
2257 case -NFS4ERR_EXPIRED:
2258 case -NFS4ERR_BAD_STATEID:
2259 case -NFS4ERR_OPENMODE:
2260 nfs_inode_find_state_and_recover(state->inode,
2261 stateid);
2262 nfs4_schedule_stateid_recovery(server, state);
2263 return -EAGAIN;
2264 case -NFS4ERR_DELAY:
2265 case -NFS4ERR_GRACE:
2266 ssleep(1);
2267 return -EAGAIN;
2268 case -ENOMEM:
2269 case -NFS4ERR_DENIED:
2270 if (fl) {
2271 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2272 if (lsp)
2273 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2274 }
2275 return 0;
2276 }
2277 return err;
2278}
2279
2280int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2281 struct nfs4_state *state, const nfs4_stateid *stateid)
2282{
2283 struct nfs_server *server = NFS_SERVER(state->inode);
2284 struct nfs4_opendata *opendata;
2285 int err = 0;
2286
2287 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2288 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2289 if (IS_ERR(opendata))
2290 return PTR_ERR(opendata);
2291 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2292 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
2293 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2294 if (err)
2295 goto out;
2296 }
2297 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
2298 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2299 if (err)
2300 goto out;
2301 }
2302 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
2303 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2304 if (err)
2305 goto out;
2306 }
2307 nfs_state_clear_delegation(state);
2308out:
2309 nfs4_opendata_put(opendata);
2310 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2311}
2312
2313static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2314{
2315 struct nfs4_opendata *data = calldata;
2316
2317 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2318 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2319}
2320
2321static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2322{
2323 struct nfs4_opendata *data = calldata;
2324
2325 nfs40_sequence_done(task, &data->c_res.seq_res);
2326
2327 data->rpc_status = task->tk_status;
2328 if (data->rpc_status == 0) {
2329 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2330 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2331 renew_lease(data->o_res.server, data->timestamp);
2332 data->rpc_done = true;
2333 }
2334}
2335
2336static void nfs4_open_confirm_release(void *calldata)
2337{
2338 struct nfs4_opendata *data = calldata;
2339 struct nfs4_state *state = NULL;
2340
2341
2342 if (!data->cancelled)
2343 goto out_free;
2344
2345 if (!data->rpc_done)
2346 goto out_free;
2347 state = nfs4_opendata_to_nfs4_state(data);
2348 if (!IS_ERR(state))
2349 nfs4_close_state(state, data->o_arg.fmode);
2350out_free:
2351 nfs4_opendata_put(data);
2352}
2353
2354static const struct rpc_call_ops nfs4_open_confirm_ops = {
2355 .rpc_call_prepare = nfs4_open_confirm_prepare,
2356 .rpc_call_done = nfs4_open_confirm_done,
2357 .rpc_release = nfs4_open_confirm_release,
2358};
2359
2360
2361
2362
2363static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2364{
2365 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2366 struct rpc_task *task;
2367 struct rpc_message msg = {
2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2369 .rpc_argp = &data->c_arg,
2370 .rpc_resp = &data->c_res,
2371 .rpc_cred = data->owner->so_cred,
2372 };
2373 struct rpc_task_setup task_setup_data = {
2374 .rpc_client = server->client,
2375 .rpc_message = &msg,
2376 .callback_ops = &nfs4_open_confirm_ops,
2377 .callback_data = data,
2378 .workqueue = nfsiod_workqueue,
2379 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
2380 };
2381 int status;
2382
2383 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2384 data->is_recover);
2385 kref_get(&data->kref);
2386 data->rpc_done = false;
2387 data->rpc_status = 0;
2388 data->timestamp = jiffies;
2389 task = rpc_run_task(&task_setup_data);
2390 if (IS_ERR(task))
2391 return PTR_ERR(task);
2392 status = rpc_wait_for_completion_task(task);
2393 if (status != 0) {
2394 data->cancelled = true;
2395 smp_wmb();
2396 } else
2397 status = data->rpc_status;
2398 rpc_put_task(task);
2399 return status;
2400}
2401
2402static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2403{
2404 struct nfs4_opendata *data = calldata;
2405 struct nfs4_state_owner *sp = data->owner;
2406 struct nfs_client *clp = sp->so_server->nfs_client;
2407 enum open_claim_type4 claim = data->o_arg.claim;
2408
2409 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2410 goto out_wait;
2411
2412
2413
2414
2415 if (data->state != NULL) {
2416 struct nfs_delegation *delegation;
2417
2418 if (can_open_cached(data->state, data->o_arg.fmode,
2419 data->o_arg.open_flags, claim))
2420 goto out_no_action;
2421 rcu_read_lock();
2422 delegation = nfs4_get_valid_delegation(data->state->inode);
2423 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2424 goto unlock_no_action;
2425 rcu_read_unlock();
2426 }
2427
2428 data->o_arg.clientid = clp->cl_clientid;
2429 switch (claim) {
2430 default:
2431 break;
2432 case NFS4_OPEN_CLAIM_PREVIOUS:
2433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2434 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2435 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2436 fallthrough;
2437 case NFS4_OPEN_CLAIM_FH:
2438 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2439 }
2440 data->timestamp = jiffies;
2441 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2442 &data->o_arg.seq_args,
2443 &data->o_res.seq_res,
2444 task) != 0)
2445 nfs_release_seqid(data->o_arg.seqid);
2446
2447
2448 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2449 if (data->o_arg.open_flags & O_EXCL) {
2450 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2451 if (nfs4_has_persistent_session(clp))
2452 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2453 else if (clp->cl_mvops->minor_version > 0)
2454 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2455 }
2456 return;
2457unlock_no_action:
2458 trace_nfs4_cached_open(data->state);
2459 rcu_read_unlock();
2460out_no_action:
2461 task->tk_action = NULL;
2462out_wait:
2463 nfs4_sequence_done(task, &data->o_res.seq_res);
2464}
2465
2466static void nfs4_open_done(struct rpc_task *task, void *calldata)
2467{
2468 struct nfs4_opendata *data = calldata;
2469
2470 data->rpc_status = task->tk_status;
2471
2472 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2473 return;
2474
2475 if (task->tk_status == 0) {
2476 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2477 switch (data->o_res.f_attr->mode & S_IFMT) {
2478 case S_IFREG:
2479 break;
2480 case S_IFLNK:
2481 data->rpc_status = -ELOOP;
2482 break;
2483 case S_IFDIR:
2484 data->rpc_status = -EISDIR;
2485 break;
2486 default:
2487 data->rpc_status = -ENOTDIR;
2488 }
2489 }
2490 renew_lease(data->o_res.server, data->timestamp);
2491 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2492 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2493 }
2494 data->rpc_done = true;
2495}
2496
2497static void nfs4_open_release(void *calldata)
2498{
2499 struct nfs4_opendata *data = calldata;
2500 struct nfs4_state *state = NULL;
2501
2502
2503 if (!data->cancelled)
2504 goto out_free;
2505
2506 if (data->rpc_status != 0 || !data->rpc_done)
2507 goto out_free;
2508
2509 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2510 goto out_free;
2511 state = nfs4_opendata_to_nfs4_state(data);
2512 if (!IS_ERR(state))
2513 nfs4_close_state(state, data->o_arg.fmode);
2514out_free:
2515 nfs4_opendata_put(data);
2516}
2517
2518static const struct rpc_call_ops nfs4_open_ops = {
2519 .rpc_call_prepare = nfs4_open_prepare,
2520 .rpc_call_done = nfs4_open_done,
2521 .rpc_release = nfs4_open_release,
2522};
2523
2524static int nfs4_run_open_task(struct nfs4_opendata *data,
2525 struct nfs_open_context *ctx)
2526{
2527 struct inode *dir = d_inode(data->dir);
2528 struct nfs_server *server = NFS_SERVER(dir);
2529 struct nfs_openargs *o_arg = &data->o_arg;
2530 struct nfs_openres *o_res = &data->o_res;
2531 struct rpc_task *task;
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2534 .rpc_argp = o_arg,
2535 .rpc_resp = o_res,
2536 .rpc_cred = data->owner->so_cred,
2537 };
2538 struct rpc_task_setup task_setup_data = {
2539 .rpc_client = server->client,
2540 .rpc_message = &msg,
2541 .callback_ops = &nfs4_open_ops,
2542 .callback_data = data,
2543 .workqueue = nfsiod_workqueue,
2544 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
2545 };
2546 int status;
2547
2548 kref_get(&data->kref);
2549 data->rpc_done = false;
2550 data->rpc_status = 0;
2551 data->cancelled = false;
2552 data->is_recover = false;
2553 if (!ctx) {
2554 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
2555 data->is_recover = true;
2556 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2557 } else {
2558 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2559 pnfs_lgopen_prepare(data, ctx);
2560 }
2561 task = rpc_run_task(&task_setup_data);
2562 if (IS_ERR(task))
2563 return PTR_ERR(task);
2564 status = rpc_wait_for_completion_task(task);
2565 if (status != 0) {
2566 data->cancelled = true;
2567 smp_wmb();
2568 } else
2569 status = data->rpc_status;
2570 rpc_put_task(task);
2571
2572 return status;
2573}
2574
2575static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2576{
2577 struct inode *dir = d_inode(data->dir);
2578 struct nfs_openres *o_res = &data->o_res;
2579 int status;
2580
2581 status = nfs4_run_open_task(data, NULL);
2582 if (status != 0 || !data->rpc_done)
2583 return status;
2584
2585 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2586
2587 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2588 status = _nfs4_proc_open_confirm(data);
2589
2590 return status;
2591}
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601static int nfs4_opendata_access(const struct cred *cred,
2602 struct nfs4_opendata *opendata,
2603 struct nfs4_state *state, fmode_t fmode,
2604 int openflags)
2605{
2606 struct nfs_access_entry cache;
2607 u32 mask, flags;
2608
2609
2610
2611 if (opendata->o_res.access_supported == 0)
2612 return 0;
2613
2614 mask = 0;
2615
2616
2617
2618
2619 if (openflags & __FMODE_EXEC) {
2620
2621 if (S_ISDIR(state->inode->i_mode))
2622 mask = NFS4_ACCESS_LOOKUP;
2623 else
2624 mask = NFS4_ACCESS_EXECUTE;
2625 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2626 mask = NFS4_ACCESS_READ;
2627
2628 cache.cred = cred;
2629 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2630 nfs_access_add_cache(state->inode, &cache);
2631
2632 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2633 if ((mask & ~cache.mask & flags) == 0)
2634 return 0;
2635
2636 return -EACCES;
2637}
2638
2639
2640
2641
2642static int _nfs4_proc_open(struct nfs4_opendata *data,
2643 struct nfs_open_context *ctx)
2644{
2645 struct inode *dir = d_inode(data->dir);
2646 struct nfs_server *server = NFS_SERVER(dir);
2647 struct nfs_openargs *o_arg = &data->o_arg;
2648 struct nfs_openres *o_res = &data->o_res;
2649 int status;
2650
2651 status = nfs4_run_open_task(data, ctx);
2652 if (!data->rpc_done)
2653 return status;
2654 if (status != 0) {
2655 if (status == -NFS4ERR_BADNAME &&
2656 !(o_arg->open_flags & O_CREAT))
2657 return -ENOENT;
2658 return status;
2659 }
2660
2661 nfs_fattr_map_and_free_names(server, &data->f_attr);
2662
2663 if (o_arg->open_flags & O_CREAT) {
2664 if (o_arg->open_flags & O_EXCL)
2665 data->file_created = true;
2666 else if (o_res->cinfo.before != o_res->cinfo.after)
2667 data->file_created = true;
2668 if (data->file_created ||
2669 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2670 nfs4_update_changeattr(dir, &o_res->cinfo,
2671 o_res->f_attr->time_start,
2672 NFS_INO_INVALID_DATA);
2673 }
2674 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2675 server->caps &= ~NFS_CAP_POSIX_LOCK;
2676 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2677 status = _nfs4_proc_open_confirm(data);
2678 if (status != 0)
2679 return status;
2680 }
2681 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2682 nfs4_sequence_free_slot(&o_res->seq_res);
2683 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2684 o_res->f_label, NULL);
2685 }
2686 return 0;
2687}
2688
2689
2690
2691
2692
2693
2694static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2695{
2696 struct nfs4_opendata *opendata;
2697 int ret;
2698
2699 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2700 NFS4_OPEN_CLAIM_FH);
2701 if (IS_ERR(opendata))
2702 return PTR_ERR(opendata);
2703 ret = nfs4_open_recover(opendata, state);
2704 if (ret == -ESTALE)
2705 d_drop(ctx->dentry);
2706 nfs4_opendata_put(opendata);
2707 return ret;
2708}
2709
2710static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2711{
2712 struct nfs_server *server = NFS_SERVER(state->inode);
2713 struct nfs4_exception exception = { };
2714 int err;
2715
2716 do {
2717 err = _nfs4_open_expired(ctx, state);
2718 trace_nfs4_open_expired(ctx, 0, err);
2719 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2720 continue;
2721 switch (err) {
2722 default:
2723 goto out;
2724 case -NFS4ERR_GRACE:
2725 case -NFS4ERR_DELAY:
2726 nfs4_handle_exception(server, err, &exception);
2727 err = 0;
2728 }
2729 } while (exception.retry);
2730out:
2731 return err;
2732}
2733
2734static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2735{
2736 struct nfs_open_context *ctx;
2737 int ret;
2738
2739 ctx = nfs4_state_find_open_context(state);
2740 if (IS_ERR(ctx))
2741 return -EAGAIN;
2742 ret = nfs4_do_open_expired(ctx, state);
2743 put_nfs_open_context(ctx);
2744 return ret;
2745}
2746
2747static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2748 const nfs4_stateid *stateid)
2749{
2750 nfs_remove_bad_delegation(state->inode, stateid);
2751 nfs_state_clear_delegation(state);
2752}
2753
2754static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2755{
2756 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2757 nfs_finish_clear_delegation_stateid(state, NULL);
2758}
2759
2760static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2761{
2762
2763 nfs40_clear_delegation_stateid(state);
2764 nfs_state_clear_open_state_flags(state);
2765 return nfs4_open_expired(sp, state);
2766}
2767
2768static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2769 nfs4_stateid *stateid,
2770 const struct cred *cred)
2771{
2772 return -NFS4ERR_BAD_STATEID;
2773}
2774
2775#if defined(CONFIG_NFS_V4_1)
2776static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2777 nfs4_stateid *stateid,
2778 const struct cred *cred)
2779{
2780 int status;
2781
2782 switch (stateid->type) {
2783 default:
2784 break;
2785 case NFS4_INVALID_STATEID_TYPE:
2786 case NFS4_SPECIAL_STATEID_TYPE:
2787 return -NFS4ERR_BAD_STATEID;
2788 case NFS4_REVOKED_STATEID_TYPE:
2789 goto out_free;
2790 }
2791
2792 status = nfs41_test_stateid(server, stateid, cred);
2793 switch (status) {
2794 case -NFS4ERR_EXPIRED:
2795 case -NFS4ERR_ADMIN_REVOKED:
2796 case -NFS4ERR_DELEG_REVOKED:
2797 break;
2798 default:
2799 return status;
2800 }
2801out_free:
2802
2803 nfs41_free_stateid(server, stateid, cred, true);
2804 return -NFS4ERR_EXPIRED;
2805}
2806
2807static int nfs41_check_delegation_stateid(struct nfs4_state *state)
2808{
2809 struct nfs_server *server = NFS_SERVER(state->inode);
2810 nfs4_stateid stateid;
2811 struct nfs_delegation *delegation;
2812 const struct cred *cred = NULL;
2813 int status, ret = NFS_OK;
2814
2815
2816 rcu_read_lock();
2817 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2818 if (delegation == NULL) {
2819 rcu_read_unlock();
2820 nfs_state_clear_delegation(state);
2821 return NFS_OK;
2822 }
2823
2824 spin_lock(&delegation->lock);
2825 nfs4_stateid_copy(&stateid, &delegation->stateid);
2826
2827 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2828 &delegation->flags)) {
2829 spin_unlock(&delegation->lock);
2830 rcu_read_unlock();
2831 return NFS_OK;
2832 }
2833
2834 if (delegation->cred)
2835 cred = get_cred(delegation->cred);
2836 spin_unlock(&delegation->lock);
2837 rcu_read_unlock();
2838 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2839 trace_nfs4_test_delegation_stateid(state, NULL, status);
2840 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2841 nfs_finish_clear_delegation_stateid(state, &stateid);
2842 else
2843 ret = status;
2844
2845 put_cred(cred);
2846 return ret;
2847}
2848
2849static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2850{
2851 nfs4_stateid tmp;
2852
2853 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2854 nfs4_copy_delegation_stateid(state->inode, state->state,
2855 &tmp, NULL) &&
2856 nfs4_stateid_match_other(&state->stateid, &tmp))
2857 nfs_state_set_delegation(state, &tmp, state->state);
2858 else
2859 nfs_state_clear_delegation(state);
2860}
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870static int nfs41_check_expired_locks(struct nfs4_state *state)
2871{
2872 int status, ret = NFS_OK;
2873 struct nfs4_lock_state *lsp, *prev = NULL;
2874 struct nfs_server *server = NFS_SERVER(state->inode);
2875
2876 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2877 goto out;
2878
2879 spin_lock(&state->state_lock);
2880 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2881 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2882 const struct cred *cred = lsp->ls_state->owner->so_cred;
2883
2884 refcount_inc(&lsp->ls_count);
2885 spin_unlock(&state->state_lock);
2886
2887 nfs4_put_lock_state(prev);
2888 prev = lsp;
2889
2890 status = nfs41_test_and_free_expired_stateid(server,
2891 &lsp->ls_stateid,
2892 cred);
2893 trace_nfs4_test_lock_stateid(state, lsp, status);
2894 if (status == -NFS4ERR_EXPIRED ||
2895 status == -NFS4ERR_BAD_STATEID) {
2896 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2897 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2898 if (!recover_lost_locks)
2899 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2900 } else if (status != NFS_OK) {
2901 ret = status;
2902 nfs4_put_lock_state(prev);
2903 goto out;
2904 }
2905 spin_lock(&state->state_lock);
2906 }
2907 }
2908 spin_unlock(&state->state_lock);
2909 nfs4_put_lock_state(prev);
2910out:
2911 return ret;
2912}
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922static int nfs41_check_open_stateid(struct nfs4_state *state)
2923{
2924 struct nfs_server *server = NFS_SERVER(state->inode);
2925 nfs4_stateid *stateid = &state->open_stateid;
2926 const struct cred *cred = state->owner->so_cred;
2927 int status;
2928
2929 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
2930 return -NFS4ERR_BAD_STATEID;
2931 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2932 trace_nfs4_test_open_stateid(state, NULL, status);
2933 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2934 nfs_state_clear_open_state_flags(state);
2935 stateid->type = NFS4_INVALID_STATEID_TYPE;
2936 return status;
2937 }
2938 if (nfs_open_stateid_recover_openmode(state))
2939 return -NFS4ERR_OPENMODE;
2940 return NFS_OK;
2941}
2942
2943static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2944{
2945 int status;
2946
2947 status = nfs41_check_delegation_stateid(state);
2948 if (status != NFS_OK)
2949 return status;
2950 nfs41_delegation_recover_stateid(state);
2951
2952 status = nfs41_check_expired_locks(state);
2953 if (status != NFS_OK)
2954 return status;
2955 status = nfs41_check_open_stateid(state);
2956 if (status != NFS_OK)
2957 status = nfs4_open_expired(sp, state);
2958 return status;
2959}
2960#endif
2961
2962
2963
2964
2965
2966
2967static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2968 struct iattr *sattr, struct nfs4_label **label)
2969{
2970 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2971 __u32 attrset[3];
2972 unsigned ret;
2973 unsigned i;
2974
2975 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2976 attrset[i] = opendata->o_res.attrset[i];
2977 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2978 attrset[i] &= ~bitmask[i];
2979 }
2980
2981 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2982 sattr->ia_valid : 0;
2983
2984 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2985 if (sattr->ia_valid & ATTR_ATIME_SET)
2986 ret |= ATTR_ATIME_SET;
2987 else
2988 ret |= ATTR_ATIME;
2989 }
2990
2991 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2992 if (sattr->ia_valid & ATTR_MTIME_SET)
2993 ret |= ATTR_MTIME_SET;
2994 else
2995 ret |= ATTR_MTIME;
2996 }
2997
2998 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
2999 *label = NULL;
3000 return ret;
3001}
3002
3003static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
3004 int flags, struct nfs_open_context *ctx)
3005{
3006 struct nfs4_state_owner *sp = opendata->owner;
3007 struct nfs_server *server = sp->so_server;
3008 struct dentry *dentry;
3009 struct nfs4_state *state;
3010 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
3011 struct inode *dir = d_inode(opendata->dir);
3012 unsigned long dir_verifier;
3013 unsigned int seq;
3014 int ret;
3015
3016 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
3017 dir_verifier = nfs_save_change_attribute(dir);
3018
3019 ret = _nfs4_proc_open(opendata, ctx);
3020 if (ret != 0)
3021 goto out;
3022
3023 state = _nfs4_opendata_to_nfs4_state(opendata);
3024 ret = PTR_ERR(state);
3025 if (IS_ERR(state))
3026 goto out;
3027 ctx->state = state;
3028 if (server->caps & NFS_CAP_POSIX_LOCK)
3029 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
3030 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3031 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
3032
3033 dentry = opendata->dentry;
3034 if (d_really_is_negative(dentry)) {
3035 struct dentry *alias;
3036 d_drop(dentry);
3037 alias = d_exact_alias(dentry, state->inode);
3038 if (!alias)
3039 alias = d_splice_alias(igrab(state->inode), dentry);
3040
3041 if (alias) {
3042 dput(ctx->dentry);
3043 ctx->dentry = dentry = alias;
3044 }
3045 }
3046
3047 switch(opendata->o_arg.claim) {
3048 default:
3049 break;
3050 case NFS4_OPEN_CLAIM_NULL:
3051 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3052 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3053 if (!opendata->rpc_done)
3054 break;
3055 if (opendata->o_res.delegation_type != 0)
3056 dir_verifier = nfs_save_change_attribute(dir);
3057 nfs_set_verifier(dentry, dir_verifier);
3058 }
3059
3060
3061 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3062
3063 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
3064 acc_mode, flags);
3065 if (ret != 0)
3066 goto out;
3067
3068 if (d_inode(dentry) == state->inode) {
3069 nfs_inode_attach_open_context(ctx);
3070 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3071 nfs4_schedule_stateid_recovery(server, state);
3072 }
3073
3074out:
3075 if (!opendata->cancelled)
3076 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
3077 return ret;
3078}
3079
3080
3081
3082
3083static int _nfs4_do_open(struct inode *dir,
3084 struct nfs_open_context *ctx,
3085 int flags,
3086 const struct nfs4_open_createattrs *c,
3087 int *opened)
3088{
3089 struct nfs4_state_owner *sp;
3090 struct nfs4_state *state = NULL;
3091 struct nfs_server *server = NFS_SERVER(dir);
3092 struct nfs4_opendata *opendata;
3093 struct dentry *dentry = ctx->dentry;
3094 const struct cred *cred = ctx->cred;
3095 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
3096 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
3097 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
3098 struct iattr *sattr = c->sattr;
3099 struct nfs4_label *label = c->label;
3100 struct nfs4_label *olabel = NULL;
3101 int status;
3102
3103
3104 status = -ENOMEM;
3105 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3106 if (sp == NULL) {
3107 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3108 goto out_err;
3109 }
3110 status = nfs4_client_recover_expired_lease(server->nfs_client);
3111 if (status != 0)
3112 goto err_put_state_owner;
3113 if (d_really_is_positive(dentry))
3114 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
3115 status = -ENOMEM;
3116 if (d_really_is_positive(dentry))
3117 claim = NFS4_OPEN_CLAIM_FH;
3118 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3119 c, claim, GFP_KERNEL);
3120 if (opendata == NULL)
3121 goto err_put_state_owner;
3122
3123 if (label) {
3124 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3125 if (IS_ERR(olabel)) {
3126 status = PTR_ERR(olabel);
3127 goto err_opendata_put;
3128 }
3129 }
3130
3131 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3132 if (!opendata->f_attr.mdsthreshold) {
3133 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3134 if (!opendata->f_attr.mdsthreshold)
3135 goto err_free_label;
3136 }
3137 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
3138 }
3139 if (d_really_is_positive(dentry))
3140 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
3141
3142 status = _nfs4_open_and_get_state(opendata, flags, ctx);
3143 if (status != 0)
3144 goto err_free_label;
3145 state = ctx->state;
3146
3147 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
3148 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
3149 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
3150
3151
3152
3153
3154 if (attrs || label) {
3155 unsigned ia_old = sattr->ia_valid;
3156
3157 sattr->ia_valid = attrs;
3158 nfs_fattr_init(opendata->o_res.f_attr);
3159 status = nfs4_do_setattr(state->inode, cred,
3160 opendata->o_res.f_attr, sattr,
3161 ctx, label, olabel);
3162 if (status == 0) {
3163 nfs_setattr_update_inode(state->inode, sattr,
3164 opendata->o_res.f_attr);
3165 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3166 }
3167 sattr->ia_valid = ia_old;
3168 }
3169 }
3170 if (opened && opendata->file_created)
3171 *opened = 1;
3172
3173 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
3174 *ctx_th = opendata->f_attr.mdsthreshold;
3175 opendata->f_attr.mdsthreshold = NULL;
3176 }
3177
3178 nfs4_label_free(olabel);
3179
3180 nfs4_opendata_put(opendata);
3181 nfs4_put_state_owner(sp);
3182 return 0;
3183err_free_label:
3184 nfs4_label_free(olabel);
3185err_opendata_put:
3186 nfs4_opendata_put(opendata);
3187err_put_state_owner:
3188 nfs4_put_state_owner(sp);
3189out_err:
3190 return status;
3191}
3192
3193
3194static struct nfs4_state *nfs4_do_open(struct inode *dir,
3195 struct nfs_open_context *ctx,
3196 int flags,
3197 struct iattr *sattr,
3198 struct nfs4_label *label,
3199 int *opened)
3200{
3201 struct nfs_server *server = NFS_SERVER(dir);
3202 struct nfs4_exception exception = {
3203 .interruptible = true,
3204 };
3205 struct nfs4_state *res;
3206 struct nfs4_open_createattrs c = {
3207 .label = label,
3208 .sattr = sattr,
3209 .verf = {
3210 [0] = (__u32)jiffies,
3211 [1] = (__u32)current->pid,
3212 },
3213 };
3214 int status;
3215
3216 do {
3217 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3218 res = ctx->state;
3219 trace_nfs4_open_file(ctx, flags, status);
3220 if (status == 0)
3221 break;
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233 if (status == -NFS4ERR_BAD_SEQID) {
3234 pr_warn_ratelimited("NFS: v4 server %s "
3235 " returned a bad sequence-id error!\n",
3236 NFS_SERVER(dir)->nfs_client->cl_hostname);
3237 exception.retry = 1;
3238 continue;
3239 }
3240
3241
3242
3243
3244
3245
3246 if (status == -NFS4ERR_BAD_STATEID) {
3247 exception.retry = 1;
3248 continue;
3249 }
3250 if (status == -NFS4ERR_EXPIRED) {
3251 nfs4_schedule_lease_recovery(server->nfs_client);
3252 exception.retry = 1;
3253 continue;
3254 }
3255 if (status == -EAGAIN) {
3256
3257 exception.retry = 1;
3258 continue;
3259 }
3260 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3261 continue;
3262 res = ERR_PTR(nfs4_handle_exception(server,
3263 status, &exception));
3264 } while (exception.retry);
3265 return res;
3266}
3267
3268static int _nfs4_do_setattr(struct inode *inode,
3269 struct nfs_setattrargs *arg,
3270 struct nfs_setattrres *res,
3271 const struct cred *cred,
3272 struct nfs_open_context *ctx)
3273{
3274 struct nfs_server *server = NFS_SERVER(inode);
3275 struct rpc_message msg = {
3276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3277 .rpc_argp = arg,
3278 .rpc_resp = res,
3279 .rpc_cred = cred,
3280 };
3281 const struct cred *delegation_cred = NULL;
3282 unsigned long timestamp = jiffies;
3283 bool truncate;
3284 int status;
3285
3286 nfs_fattr_init(res->fattr);
3287
3288
3289 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3290 if (!truncate) {
3291 nfs4_inode_make_writeable(inode);
3292 goto zero_stateid;
3293 }
3294
3295 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
3296
3297 } else if (ctx != NULL && ctx->state) {
3298 struct nfs_lock_context *l_ctx;
3299 if (!nfs4_valid_open_stateid(ctx->state))
3300 return -EBADF;
3301 l_ctx = nfs_get_lock_context(ctx);
3302 if (IS_ERR(l_ctx))
3303 return PTR_ERR(l_ctx);
3304 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3305 &arg->stateid, &delegation_cred);
3306 nfs_put_lock_context(l_ctx);
3307 if (status == -EIO)
3308 return -EBADF;
3309 else if (status == -EAGAIN)
3310 goto zero_stateid;
3311 } else {
3312zero_stateid:
3313 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3314 }
3315 if (delegation_cred)
3316 msg.rpc_cred = delegation_cred;
3317
3318 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3319
3320 put_cred(delegation_cred);
3321 if (status == 0 && ctx != NULL)
3322 renew_lease(server, timestamp);
3323 trace_nfs4_setattr(inode, &arg->stateid, status);
3324 return status;
3325}
3326
3327static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
3328 struct nfs_fattr *fattr, struct iattr *sattr,
3329 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
3330 struct nfs4_label *olabel)
3331{
3332 struct nfs_server *server = NFS_SERVER(inode);
3333 __u32 bitmask[NFS4_BITMASK_SZ];
3334 struct nfs4_state *state = ctx ? ctx->state : NULL;
3335 struct nfs_setattrargs arg = {
3336 .fh = NFS_FH(inode),
3337 .iap = sattr,
3338 .server = server,
3339 .bitmask = bitmask,
3340 .label = ilabel,
3341 };
3342 struct nfs_setattrres res = {
3343 .fattr = fattr,
3344 .label = olabel,
3345 .server = server,
3346 };
3347 struct nfs4_exception exception = {
3348 .state = state,
3349 .inode = inode,
3350 .stateid = &arg.stateid,
3351 };
3352 int err;
3353
3354 do {
3355 nfs4_bitmap_copy_adjust_setattr(bitmask,
3356 nfs4_bitmask(server, olabel),
3357 inode);
3358
3359 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3360 switch (err) {
3361 case -NFS4ERR_OPENMODE:
3362 if (!(sattr->ia_valid & ATTR_SIZE)) {
3363 pr_warn_once("NFSv4: server %s is incorrectly "
3364 "applying open mode checks to "
3365 "a SETATTR that is not "
3366 "changing file size.\n",
3367 server->nfs_client->cl_hostname);
3368 }
3369 if (state && !(state->state & FMODE_WRITE)) {
3370 err = -EBADF;
3371 if (sattr->ia_valid & ATTR_OPEN)
3372 err = -EACCES;
3373 goto out;
3374 }
3375 }
3376 err = nfs4_handle_exception(server, err, &exception);
3377 } while (exception.retry);
3378out:
3379 return err;
3380}
3381
3382static bool
3383nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3384{
3385 if (inode == NULL || !nfs_have_layout(inode))
3386 return false;
3387
3388 return pnfs_wait_on_layoutreturn(inode, task);
3389}
3390
3391
3392
3393
3394static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3395 struct nfs4_state *state)
3396{
3397 __be32 seqid_open;
3398 u32 dst_seqid;
3399 int seq;
3400
3401 for (;;) {
3402 if (!nfs4_valid_open_stateid(state))
3403 break;
3404 seq = read_seqbegin(&state->seqlock);
3405 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3406 nfs4_stateid_copy(dst, &state->open_stateid);
3407 if (read_seqretry(&state->seqlock, seq))
3408 continue;
3409 break;
3410 }
3411 seqid_open = state->open_stateid.seqid;
3412 if (read_seqretry(&state->seqlock, seq))
3413 continue;
3414
3415 dst_seqid = be32_to_cpu(dst->seqid);
3416 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3417 dst->seqid = seqid_open;
3418 break;
3419 }
3420}
3421
3422
3423
3424
3425
3426static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3427 struct nfs4_state *state)
3428{
3429 __be32 seqid_open;
3430 u32 dst_seqid;
3431 bool ret;
3432 int seq, status = -EAGAIN;
3433 DEFINE_WAIT(wait);
3434
3435 for (;;) {
3436 ret = false;
3437 if (!nfs4_valid_open_stateid(state))
3438 break;
3439 seq = read_seqbegin(&state->seqlock);
3440 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3441 if (read_seqretry(&state->seqlock, seq))
3442 continue;
3443 break;
3444 }
3445
3446 write_seqlock(&state->seqlock);
3447 seqid_open = state->open_stateid.seqid;
3448
3449 dst_seqid = be32_to_cpu(dst->seqid);
3450
3451
3452 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
3453 dst->seqid = seqid_open;
3454 write_sequnlock(&state->seqlock);
3455 ret = true;
3456 break;
3457 }
3458
3459
3460 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3461 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3462 write_sequnlock(&state->seqlock);
3463 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3464
3465 if (signal_pending(current))
3466 status = -EINTR;
3467 else
3468 if (schedule_timeout(5*HZ) != 0)
3469 status = 0;
3470
3471 finish_wait(&state->waitq, &wait);
3472
3473 if (!status)
3474 continue;
3475 if (status == -EINTR)
3476 break;
3477
3478
3479 dst->seqid = cpu_to_be32(dst_seqid + 1);
3480 ret = true;
3481 break;
3482 }
3483
3484 return ret;
3485}
3486
3487struct nfs4_closedata {
3488 struct inode *inode;
3489 struct nfs4_state *state;
3490 struct nfs_closeargs arg;
3491 struct nfs_closeres res;
3492 struct {
3493 struct nfs4_layoutreturn_args arg;
3494 struct nfs4_layoutreturn_res res;
3495 struct nfs4_xdr_opaque_data ld_private;
3496 u32 roc_barrier;
3497 bool roc;
3498 } lr;
3499 struct nfs_fattr fattr;
3500 unsigned long timestamp;
3501};
3502
3503static void nfs4_free_closedata(void *data)
3504{
3505 struct nfs4_closedata *calldata = data;
3506 struct nfs4_state_owner *sp = calldata->state->owner;
3507 struct super_block *sb = calldata->state->inode->i_sb;
3508
3509 if (calldata->lr.roc)
3510 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3511 calldata->res.lr_ret);
3512 nfs4_put_open_state(calldata->state);
3513 nfs_free_seqid(calldata->arg.seqid);
3514 nfs4_put_state_owner(sp);
3515 nfs_sb_deactive(sb);
3516 kfree(calldata);
3517}
3518
3519static void nfs4_close_done(struct rpc_task *task, void *data)
3520{
3521 struct nfs4_closedata *calldata = data;
3522 struct nfs4_state *state = calldata->state;
3523 struct nfs_server *server = NFS_SERVER(calldata->inode);
3524 nfs4_stateid *res_stateid = NULL;
3525 struct nfs4_exception exception = {
3526 .state = state,
3527 .inode = calldata->inode,
3528 .stateid = &calldata->arg.stateid,
3529 };
3530
3531 dprintk("%s: begin!\n", __func__);
3532 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3533 return;
3534 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3535
3536
3537 if (pnfs_roc_done(task, calldata->inode,
3538 &calldata->arg.lr_args,
3539 &calldata->res.lr_res,
3540 &calldata->res.lr_ret) == -EAGAIN)
3541 goto out_restart;
3542
3543
3544
3545
3546 switch (task->tk_status) {
3547 case 0:
3548 res_stateid = &calldata->res.stateid;
3549 renew_lease(server, calldata->timestamp);
3550 break;
3551 case -NFS4ERR_ACCESS:
3552 if (calldata->arg.bitmask != NULL) {
3553 calldata->arg.bitmask = NULL;
3554 calldata->res.fattr = NULL;
3555 goto out_restart;
3556
3557 }
3558 break;
3559 case -NFS4ERR_OLD_STATEID:
3560
3561 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
3562 state))
3563 goto out_restart;
3564 goto out_release;
3565 case -NFS4ERR_ADMIN_REVOKED:
3566 case -NFS4ERR_STALE_STATEID:
3567 case -NFS4ERR_EXPIRED:
3568 nfs4_free_revoked_stateid(server,
3569 &calldata->arg.stateid,
3570 task->tk_msg.rpc_cred);
3571 fallthrough;
3572 case -NFS4ERR_BAD_STATEID:
3573 if (calldata->arg.fmode == 0)
3574 break;
3575 fallthrough;
3576 default:
3577 task->tk_status = nfs4_async_handle_exception(task,
3578 server, task->tk_status, &exception);
3579 if (exception.retry)
3580 goto out_restart;
3581 }
3582 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3583 res_stateid, calldata->arg.fmode);
3584out_release:
3585 task->tk_status = 0;
3586 nfs_release_seqid(calldata->arg.seqid);
3587 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3588 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3589 return;
3590out_restart:
3591 task->tk_status = 0;
3592 rpc_restart_call_prepare(task);
3593 goto out_release;
3594}
3595
3596static void nfs4_close_prepare(struct rpc_task *task, void *data)
3597{
3598 struct nfs4_closedata *calldata = data;
3599 struct nfs4_state *state = calldata->state;
3600 struct inode *inode = calldata->inode;
3601 struct pnfs_layout_hdr *lo;
3602 bool is_rdonly, is_wronly, is_rdwr;
3603 int call_close = 0;
3604
3605 dprintk("%s: begin!\n", __func__);
3606 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3607 goto out_wait;
3608
3609 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3610 spin_lock(&state->owner->so_lock);
3611 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3612 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3613 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3614
3615 calldata->arg.fmode = 0;
3616 if (state->n_rdwr == 0) {
3617 if (state->n_rdonly == 0)
3618 call_close |= is_rdonly;
3619 else if (is_rdonly)
3620 calldata->arg.fmode |= FMODE_READ;
3621 if (state->n_wronly == 0)
3622 call_close |= is_wronly;
3623 else if (is_wronly)
3624 calldata->arg.fmode |= FMODE_WRITE;
3625 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3626 call_close |= is_rdwr;
3627 } else if (is_rdwr)
3628 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3629
3630 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3631 if (!nfs4_valid_open_stateid(state))
3632 call_close = 0;
3633 spin_unlock(&state->owner->so_lock);
3634
3635 if (!call_close) {
3636
3637 goto out_no_action;
3638 }
3639
3640 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3641 nfs_release_seqid(calldata->arg.seqid);
3642 goto out_wait;
3643 }
3644
3645 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3646 if (lo && !pnfs_layout_is_valid(lo)) {
3647 calldata->arg.lr_args = NULL;
3648 calldata->res.lr_res = NULL;
3649 }
3650
3651 if (calldata->arg.fmode == 0)
3652 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3653
3654 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3655
3656 if (!nfs4_have_delegation(inode, FMODE_READ)) {
3657 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3658 nfs4_bitmask_adjust(calldata->arg.bitmask, inode, NFS_SERVER(inode), NULL);
3659 } else
3660 calldata->arg.bitmask = NULL;
3661 }
3662
3663 calldata->arg.share_access =
3664 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3665 calldata->arg.fmode, 0);
3666
3667 if (calldata->res.fattr == NULL)
3668 calldata->arg.bitmask = NULL;
3669 else if (calldata->arg.bitmask == NULL)
3670 calldata->res.fattr = NULL;
3671 calldata->timestamp = jiffies;
3672 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3673 &calldata->arg.seq_args,
3674 &calldata->res.seq_res,
3675 task) != 0)
3676 nfs_release_seqid(calldata->arg.seqid);
3677 dprintk("%s: done!\n", __func__);
3678 return;
3679out_no_action:
3680 task->tk_action = NULL;
3681out_wait:
3682 nfs4_sequence_done(task, &calldata->res.seq_res);
3683}
3684
3685static const struct rpc_call_ops nfs4_close_ops = {
3686 .rpc_call_prepare = nfs4_close_prepare,
3687 .rpc_call_done = nfs4_close_done,
3688 .rpc_release = nfs4_free_closedata,
3689};
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3703{
3704 struct nfs_server *server = NFS_SERVER(state->inode);
3705 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3706 struct nfs4_closedata *calldata;
3707 struct nfs4_state_owner *sp = state->owner;
3708 struct rpc_task *task;
3709 struct rpc_message msg = {
3710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3711 .rpc_cred = state->owner->so_cred,
3712 };
3713 struct rpc_task_setup task_setup_data = {
3714 .rpc_client = server->client,
3715 .rpc_message = &msg,
3716 .callback_ops = &nfs4_close_ops,
3717 .workqueue = nfsiod_workqueue,
3718 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
3719 };
3720 int status = -ENOMEM;
3721
3722 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3723 &task_setup_data.rpc_client, &msg);
3724
3725 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3726 if (calldata == NULL)
3727 goto out;
3728 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
3729 calldata->inode = state->inode;
3730 calldata->state = state;
3731 calldata->arg.fh = NFS_FH(state->inode);
3732 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3733 goto out_free_calldata;
3734
3735 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3736 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3737 if (IS_ERR(calldata->arg.seqid))
3738 goto out_free_calldata;
3739 nfs_fattr_init(&calldata->fattr);
3740 calldata->arg.fmode = 0;
3741 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3742 calldata->res.fattr = &calldata->fattr;
3743 calldata->res.seqid = calldata->arg.seqid;
3744 calldata->res.server = server;
3745 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3746 calldata->lr.roc = pnfs_roc(state->inode,
3747 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3748 if (calldata->lr.roc) {
3749 calldata->arg.lr_args = &calldata->lr.arg;
3750 calldata->res.lr_res = &calldata->lr.res;
3751 }
3752 nfs_sb_active(calldata->inode->i_sb);
3753
3754 msg.rpc_argp = &calldata->arg;
3755 msg.rpc_resp = &calldata->res;
3756 task_setup_data.callback_data = calldata;
3757 task = rpc_run_task(&task_setup_data);
3758 if (IS_ERR(task))
3759 return PTR_ERR(task);
3760 status = 0;
3761 if (wait)
3762 status = rpc_wait_for_completion_task(task);
3763 rpc_put_task(task);
3764 return status;
3765out_free_calldata:
3766 kfree(calldata);
3767out:
3768 nfs4_put_open_state(state);
3769 nfs4_put_state_owner(sp);
3770 return status;
3771}
3772
3773static struct inode *
3774nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3775 int open_flags, struct iattr *attr, int *opened)
3776{
3777 struct nfs4_state *state;
3778 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3779
3780 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3781
3782
3783 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3784
3785 nfs4_label_release_security(label);
3786
3787 if (IS_ERR(state))
3788 return ERR_CAST(state);
3789 return state->inode;
3790}
3791
3792static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3793{
3794 if (ctx->state == NULL)
3795 return;
3796 if (is_sync)
3797 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
3798 else
3799 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
3800}
3801
3802#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3803#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3804#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
3805
3806static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3807{
3808 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3809 struct nfs4_server_caps_arg args = {
3810 .fhandle = fhandle,
3811 .bitmask = bitmask,
3812 };
3813 struct nfs4_server_caps_res res = {};
3814 struct rpc_message msg = {
3815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3816 .rpc_argp = &args,
3817 .rpc_resp = &res,
3818 };
3819 int status;
3820 int i;
3821
3822 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3823 FATTR4_WORD0_FH_EXPIRE_TYPE |
3824 FATTR4_WORD0_LINK_SUPPORT |
3825 FATTR4_WORD0_SYMLINK_SUPPORT |
3826 FATTR4_WORD0_ACLSUPPORT;
3827 if (minorversion)
3828 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3829
3830 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3831 if (status == 0) {
3832
3833 switch (minorversion) {
3834 case 0:
3835 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3836 res.attr_bitmask[2] = 0;
3837 break;
3838 case 1:
3839 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3840 break;
3841 case 2:
3842 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3843 }
3844 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3845 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3846 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3847 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3848 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3849 NFS_CAP_CTIME|NFS_CAP_MTIME|
3850 NFS_CAP_SECURITY_LABEL);
3851 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3852 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3853 server->caps |= NFS_CAP_ACLS;
3854 if (res.has_links != 0)
3855 server->caps |= NFS_CAP_HARDLINKS;
3856 if (res.has_symlinks != 0)
3857 server->caps |= NFS_CAP_SYMLINKS;
3858 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3859 server->caps |= NFS_CAP_FILEID;
3860 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3861 server->caps |= NFS_CAP_MODE;
3862 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3863 server->caps |= NFS_CAP_NLINK;
3864 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3865 server->caps |= NFS_CAP_OWNER;
3866 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3867 server->caps |= NFS_CAP_OWNER_GROUP;
3868 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3869 server->caps |= NFS_CAP_ATIME;
3870 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3871 server->caps |= NFS_CAP_CTIME;
3872 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3873 server->caps |= NFS_CAP_MTIME;
3874#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3875 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3876 server->caps |= NFS_CAP_SECURITY_LABEL;
3877#endif
3878 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3879 sizeof(server->attr_bitmask));
3880 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3881
3882 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3883 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3884 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3885 server->cache_consistency_bitmask[2] = 0;
3886
3887
3888 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3889 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3890 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3891 sizeof(server->exclcreat_bitmask));
3892
3893 server->acl_bitmask = res.acl_bitmask;
3894 server->fh_expire_type = res.fh_expire_type;
3895 }
3896
3897 return status;
3898}
3899
3900int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3901{
3902 struct nfs4_exception exception = {
3903 .interruptible = true,
3904 };
3905 int err;
3906 do {
3907 err = nfs4_handle_exception(server,
3908 _nfs4_server_capabilities(server, fhandle),
3909 &exception);
3910 } while (exception.retry);
3911 return err;
3912}
3913
3914static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3915 struct nfs_fsinfo *info)
3916{
3917 u32 bitmask[3];
3918 struct nfs4_lookup_root_arg args = {
3919 .bitmask = bitmask,
3920 };
3921 struct nfs4_lookup_res res = {
3922 .server = server,
3923 .fattr = info->fattr,
3924 .fh = fhandle,
3925 };
3926 struct rpc_message msg = {
3927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3928 .rpc_argp = &args,
3929 .rpc_resp = &res,
3930 };
3931
3932 bitmask[0] = nfs4_fattr_bitmap[0];
3933 bitmask[1] = nfs4_fattr_bitmap[1];
3934
3935
3936
3937 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3938
3939 nfs_fattr_init(info->fattr);
3940 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3941}
3942
3943static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3944 struct nfs_fsinfo *info)
3945{
3946 struct nfs4_exception exception = {
3947 .interruptible = true,
3948 };
3949 int err;
3950 do {
3951 err = _nfs4_lookup_root(server, fhandle, info);
3952 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3953 switch (err) {
3954 case 0:
3955 case -NFS4ERR_WRONGSEC:
3956 goto out;
3957 default:
3958 err = nfs4_handle_exception(server, err, &exception);
3959 }
3960 } while (exception.retry);
3961out:
3962 return err;
3963}
3964
3965static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3966 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3967{
3968 struct rpc_auth_create_args auth_args = {
3969 .pseudoflavor = flavor,
3970 };
3971 struct rpc_auth *auth;
3972
3973 auth = rpcauth_create(&auth_args, server->client);
3974 if (IS_ERR(auth))
3975 return -EACCES;
3976 return nfs4_lookup_root(server, fhandle, info);
3977}
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3989 struct nfs_fsinfo *info)
3990{
3991
3992 static const rpc_authflavor_t flav_array[] = {
3993 RPC_AUTH_GSS_KRB5P,
3994 RPC_AUTH_GSS_KRB5I,
3995 RPC_AUTH_GSS_KRB5,
3996 RPC_AUTH_UNIX,
3997 RPC_AUTH_NULL,
3998 };
3999 int status = -EPERM;
4000 size_t i;
4001
4002 if (server->auth_info.flavor_len > 0) {
4003
4004 for (i = 0; i < server->auth_info.flavor_len; i++) {
4005 status = nfs4_lookup_root_sec(server, fhandle, info,
4006 server->auth_info.flavors[i]);
4007 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4008 continue;
4009 break;
4010 }
4011 } else {
4012
4013 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4014 status = nfs4_lookup_root_sec(server, fhandle, info,
4015 flav_array[i]);
4016 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4017 continue;
4018 break;
4019 }
4020 }
4021
4022
4023
4024
4025
4026
4027
4028
4029 if (status == -EACCES)
4030 status = -EPERM;
4031 return status;
4032}
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
4044 struct nfs_fsinfo *info,
4045 bool auth_probe)
4046{
4047 int status = 0;
4048
4049 if (!auth_probe)
4050 status = nfs4_lookup_root(server, fhandle, info);
4051
4052 if (auth_probe || status == NFS4ERR_WRONGSEC)
4053 status = server->nfs_client->cl_mvops->find_root_sec(server,
4054 fhandle, info);
4055
4056 if (status == 0)
4057 status = nfs4_server_capabilities(server, fhandle);
4058 if (status == 0)
4059 status = nfs4_do_fsinfo(server, fhandle, info);
4060
4061 return nfs4_map_errors(status);
4062}
4063
4064static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4065 struct nfs_fsinfo *info)
4066{
4067 int error;
4068 struct nfs_fattr *fattr = info->fattr;
4069 struct nfs4_label *label = fattr->label;
4070
4071 error = nfs4_server_capabilities(server, mntfh);
4072 if (error < 0) {
4073 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4074 return error;
4075 }
4076
4077 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
4078 if (error < 0) {
4079 dprintk("nfs4_get_root: getattr error = %d\n", -error);
4080 goto out;
4081 }
4082
4083 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4084 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4085 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4086
4087out:
4088 return error;
4089}
4090
4091
4092
4093
4094
4095
4096static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4097 const struct qstr *name, struct nfs_fattr *fattr,
4098 struct nfs_fh *fhandle)
4099{
4100 int status = -ENOMEM;
4101 struct page *page = NULL;
4102 struct nfs4_fs_locations *locations = NULL;
4103
4104 page = alloc_page(GFP_KERNEL);
4105 if (page == NULL)
4106 goto out;
4107 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4108 if (locations == NULL)
4109 goto out;
4110
4111 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
4112 if (status != 0)
4113 goto out;
4114
4115
4116
4117
4118
4119
4120 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
4121 dprintk("%s: server did not return a different fsid for"
4122 " a referral at %s\n", __func__, name->name);
4123 status = -NFS4ERR_MOVED;
4124 goto out;
4125 }
4126
4127 nfs_fixup_referral_attributes(&locations->fattr);
4128
4129
4130 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
4131 memset(fhandle, 0, sizeof(struct nfs_fh));
4132out:
4133 if (page)
4134 __free_page(page);
4135 kfree(locations);
4136 return status;
4137}
4138
4139static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4140 struct nfs_fattr *fattr, struct nfs4_label *label,
4141 struct inode *inode)
4142{
4143 __u32 bitmask[NFS4_BITMASK_SZ];
4144 struct nfs4_getattr_arg args = {
4145 .fh = fhandle,
4146 .bitmask = bitmask,
4147 };
4148 struct nfs4_getattr_res res = {
4149 .fattr = fattr,
4150 .label = label,
4151 .server = server,
4152 };
4153 struct rpc_message msg = {
4154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4155 .rpc_argp = &args,
4156 .rpc_resp = &res,
4157 };
4158 unsigned short task_flags = 0;
4159
4160
4161 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4162 task_flags |= RPC_TASK_TIMEOUT;
4163
4164 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
4165
4166 nfs_fattr_init(fattr);
4167 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4168 return nfs4_do_call_sync(server->client, server, &msg,
4169 &args.seq_args, &res.seq_res, task_flags);
4170}
4171
4172int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4173 struct nfs_fattr *fattr, struct nfs4_label *label,
4174 struct inode *inode)
4175{
4176 struct nfs4_exception exception = {
4177 .interruptible = true,
4178 };
4179 int err;
4180 do {
4181 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
4182 trace_nfs4_getattr(server, fhandle, fattr, err);
4183 err = nfs4_handle_exception(server, err,
4184 &exception);
4185 } while (exception.retry);
4186 return err;
4187}
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206static int
4207nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4208 struct iattr *sattr)
4209{
4210 struct inode *inode = d_inode(dentry);
4211 const struct cred *cred = NULL;
4212 struct nfs_open_context *ctx = NULL;
4213 struct nfs4_label *label = NULL;
4214 int status;
4215
4216 if (pnfs_ld_layoutret_on_setattr(inode) &&
4217 sattr->ia_valid & ATTR_SIZE &&
4218 sattr->ia_size < i_size_read(inode))
4219 pnfs_commit_and_return_layout(inode);
4220
4221 nfs_fattr_init(fattr);
4222
4223
4224 if (sattr->ia_valid & ATTR_OPEN)
4225 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
4226
4227
4228 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
4229 return 0;
4230
4231
4232 if (sattr->ia_valid & ATTR_FILE) {
4233
4234 ctx = nfs_file_open_context(sattr->ia_file);
4235 if (ctx)
4236 cred = ctx->cred;
4237 }
4238
4239 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4240 if (IS_ERR(label))
4241 return PTR_ERR(label);
4242
4243
4244 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
4245 nfs4_inode_make_writeable(inode);
4246
4247 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
4248 if (status == 0) {
4249 nfs_setattr_update_inode(inode, sattr, fattr);
4250 nfs_setsecurity(inode, fattr, label);
4251 }
4252 nfs4_label_free(label);
4253 return status;
4254}
4255
4256static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4257 struct dentry *dentry, struct nfs_fh *fhandle,
4258 struct nfs_fattr *fattr, struct nfs4_label *label)
4259{
4260 struct nfs_server *server = NFS_SERVER(dir);
4261 int status;
4262 struct nfs4_lookup_arg args = {
4263 .bitmask = server->attr_bitmask,
4264 .dir_fh = NFS_FH(dir),
4265 .name = &dentry->d_name,
4266 };
4267 struct nfs4_lookup_res res = {
4268 .server = server,
4269 .fattr = fattr,
4270 .label = label,
4271 .fh = fhandle,
4272 };
4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4275 .rpc_argp = &args,
4276 .rpc_resp = &res,
4277 };
4278 unsigned short task_flags = 0;
4279
4280
4281 if (nfs_lookup_is_soft_revalidate(dentry))
4282 task_flags |= RPC_TASK_TIMEOUT;
4283
4284 args.bitmask = nfs4_bitmask(server, label);
4285
4286 nfs_fattr_init(fattr);
4287
4288 dprintk("NFS call lookup %pd2\n", dentry);
4289 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4290 status = nfs4_do_call_sync(clnt, server, &msg,
4291 &args.seq_args, &res.seq_res, task_flags);
4292 dprintk("NFS reply lookup: %d\n", status);
4293 return status;
4294}
4295
4296static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
4297{
4298 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4299 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
4300 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4301 fattr->nlink = 2;
4302}
4303
4304static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
4305 struct dentry *dentry, struct nfs_fh *fhandle,
4306 struct nfs_fattr *fattr, struct nfs4_label *label)
4307{
4308 struct nfs4_exception exception = {
4309 .interruptible = true,
4310 };
4311 struct rpc_clnt *client = *clnt;
4312 const struct qstr *name = &dentry->d_name;
4313 int err;
4314 do {
4315 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label);
4316 trace_nfs4_lookup(dir, name, err);
4317 switch (err) {
4318 case -NFS4ERR_BADNAME:
4319 err = -ENOENT;
4320 goto out;
4321 case -NFS4ERR_MOVED:
4322 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
4323 if (err == -NFS4ERR_MOVED)
4324 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4325 goto out;
4326 case -NFS4ERR_WRONGSEC:
4327 err = -EPERM;
4328 if (client != *clnt)
4329 goto out;
4330 client = nfs4_negotiate_security(client, dir, name);
4331 if (IS_ERR(client))
4332 return PTR_ERR(client);
4333
4334 exception.retry = 1;
4335 break;
4336 default:
4337 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4338 }
4339 } while (exception.retry);
4340
4341out:
4342 if (err == 0)
4343 *clnt = client;
4344 else if (client != *clnt)
4345 rpc_shutdown_client(client);
4346
4347 return err;
4348}
4349
4350static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
4351 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4352 struct nfs4_label *label)
4353{
4354 int status;
4355 struct rpc_clnt *client = NFS_CLIENT(dir);
4356
4357 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label);
4358 if (client != NFS_CLIENT(dir)) {
4359 rpc_shutdown_client(client);
4360 nfs_fixup_secinfo_attributes(fattr);
4361 }
4362 return status;
4363}
4364
4365struct rpc_clnt *
4366nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
4367 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4368{
4369 struct rpc_clnt *client = NFS_CLIENT(dir);
4370 int status;
4371
4372 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL);
4373 if (status < 0)
4374 return ERR_PTR(status);
4375 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
4376}
4377
4378static int _nfs4_proc_lookupp(struct inode *inode,
4379 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4380 struct nfs4_label *label)
4381{
4382 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4383 struct nfs_server *server = NFS_SERVER(inode);
4384 int status;
4385 struct nfs4_lookupp_arg args = {
4386 .bitmask = server->attr_bitmask,
4387 .fh = NFS_FH(inode),
4388 };
4389 struct nfs4_lookupp_res res = {
4390 .server = server,
4391 .fattr = fattr,
4392 .label = label,
4393 .fh = fhandle,
4394 };
4395 struct rpc_message msg = {
4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4397 .rpc_argp = &args,
4398 .rpc_resp = &res,
4399 };
4400
4401 args.bitmask = nfs4_bitmask(server, label);
4402
4403 nfs_fattr_init(fattr);
4404
4405 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4406 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4407 &res.seq_res, 0);
4408 dprintk("NFS reply lookupp: %d\n", status);
4409 return status;
4410}
4411
4412static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4413 struct nfs_fattr *fattr, struct nfs4_label *label)
4414{
4415 struct nfs4_exception exception = {
4416 .interruptible = true,
4417 };
4418 int err;
4419 do {
4420 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4421 trace_nfs4_lookupp(inode, err);
4422 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4423 &exception);
4424 } while (exception.retry);
4425 return err;
4426}
4427
4428static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4429{
4430 struct nfs_server *server = NFS_SERVER(inode);
4431 struct nfs4_accessargs args = {
4432 .fh = NFS_FH(inode),
4433 .access = entry->mask,
4434 };
4435 struct nfs4_accessres res = {
4436 .server = server,
4437 };
4438 struct rpc_message msg = {
4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4440 .rpc_argp = &args,
4441 .rpc_resp = &res,
4442 .rpc_cred = entry->cred,
4443 };
4444 int status = 0;
4445
4446 if (!nfs4_have_delegation(inode, FMODE_READ)) {
4447 res.fattr = nfs_alloc_fattr();
4448 if (res.fattr == NULL)
4449 return -ENOMEM;
4450 args.bitmask = server->cache_consistency_bitmask;
4451 }
4452 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4453 if (!status) {
4454 nfs_access_set_mask(entry, res.access);
4455 if (res.fattr)
4456 nfs_refresh_inode(inode, res.fattr);
4457 }
4458 nfs_free_fattr(res.fattr);
4459 return status;
4460}
4461
4462static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4463{
4464 struct nfs4_exception exception = {
4465 .interruptible = true,
4466 };
4467 int err;
4468 do {
4469 err = _nfs4_proc_access(inode, entry);
4470 trace_nfs4_access(inode, err);
4471 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4472 &exception);
4473 } while (exception.retry);
4474 return err;
4475}
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4500 unsigned int pgbase, unsigned int pglen)
4501{
4502 struct nfs4_readlink args = {
4503 .fh = NFS_FH(inode),
4504 .pgbase = pgbase,
4505 .pglen = pglen,
4506 .pages = &page,
4507 };
4508 struct nfs4_readlink_res res;
4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4511 .rpc_argp = &args,
4512 .rpc_resp = &res,
4513 };
4514
4515 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4516}
4517
4518static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4519 unsigned int pgbase, unsigned int pglen)
4520{
4521 struct nfs4_exception exception = {
4522 .interruptible = true,
4523 };
4524 int err;
4525 do {
4526 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4527 trace_nfs4_readlink(inode, err);
4528 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4529 &exception);
4530 } while (exception.retry);
4531 return err;
4532}
4533
4534
4535
4536
4537static int
4538nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4539 int flags)
4540{
4541 struct nfs_server *server = NFS_SERVER(dir);
4542 struct nfs4_label l, *ilabel = NULL;
4543 struct nfs_open_context *ctx;
4544 struct nfs4_state *state;
4545 int status = 0;
4546
4547 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4548 if (IS_ERR(ctx))
4549 return PTR_ERR(ctx);
4550
4551 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4552
4553 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4554 sattr->ia_mode &= ~current_umask();
4555 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4556 if (IS_ERR(state)) {
4557 status = PTR_ERR(state);
4558 goto out;
4559 }
4560out:
4561 nfs4_label_release_security(ilabel);
4562 put_nfs_open_context(ctx);
4563 return status;
4564}
4565
4566static int
4567_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
4568{
4569 struct nfs_server *server = NFS_SERVER(dir);
4570 struct nfs_removeargs args = {
4571 .fh = NFS_FH(dir),
4572 .name = *name,
4573 };
4574 struct nfs_removeres res = {
4575 .server = server,
4576 };
4577 struct rpc_message msg = {
4578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4579 .rpc_argp = &args,
4580 .rpc_resp = &res,
4581 };
4582 unsigned long timestamp = jiffies;
4583 int status;
4584
4585 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4586 if (status == 0) {
4587 spin_lock(&dir->i_lock);
4588 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4589 NFS_INO_INVALID_DATA);
4590
4591 if (ftype == NF4DIR && dir->i_nlink > 2)
4592 nfs4_dec_nlink_locked(dir);
4593 spin_unlock(&dir->i_lock);
4594 }
4595 return status;
4596}
4597
4598static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
4599{
4600 struct nfs4_exception exception = {
4601 .interruptible = true,
4602 };
4603 struct inode *inode = d_inode(dentry);
4604 int err;
4605
4606 if (inode) {
4607 if (inode->i_nlink == 1)
4608 nfs4_inode_return_delegation(inode);
4609 else
4610 nfs4_inode_make_writeable(inode);
4611 }
4612 do {
4613 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
4614 trace_nfs4_remove(dir, &dentry->d_name, err);
4615 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4616 &exception);
4617 } while (exception.retry);
4618 return err;
4619}
4620
4621static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4622{
4623 struct nfs4_exception exception = {
4624 .interruptible = true,
4625 };
4626 int err;
4627
4628 do {
4629 err = _nfs4_proc_remove(dir, name, NF4DIR);
4630 trace_nfs4_remove(dir, name, err);
4631 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4632 &exception);
4633 } while (exception.retry);
4634 return err;
4635}
4636
4637static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4638 struct dentry *dentry,
4639 struct inode *inode)
4640{
4641 struct nfs_removeargs *args = msg->rpc_argp;
4642 struct nfs_removeres *res = msg->rpc_resp;
4643
4644 res->server = NFS_SB(dentry->d_sb);
4645 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4646 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
4647
4648 nfs_fattr_init(res->dir_attr);
4649
4650 if (inode)
4651 nfs4_inode_return_delegation(inode);
4652}
4653
4654static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4655{
4656 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4657 &data->args.seq_args,
4658 &data->res.seq_res,
4659 task);
4660}
4661
4662static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4663{
4664 struct nfs_unlinkdata *data = task->tk_calldata;
4665 struct nfs_removeres *res = &data->res;
4666
4667 if (!nfs4_sequence_done(task, &res->seq_res))
4668 return 0;
4669 if (nfs4_async_handle_error(task, res->server, NULL,
4670 &data->timeout) == -EAGAIN)
4671 return 0;
4672 if (task->tk_status == 0)
4673 nfs4_update_changeattr(dir, &res->cinfo,
4674 res->dir_attr->time_start,
4675 NFS_INO_INVALID_DATA);
4676 return 1;
4677}
4678
4679static void nfs4_proc_rename_setup(struct rpc_message *msg,
4680 struct dentry *old_dentry,
4681 struct dentry *new_dentry)
4682{
4683 struct nfs_renameargs *arg = msg->rpc_argp;
4684 struct nfs_renameres *res = msg->rpc_resp;
4685 struct inode *old_inode = d_inode(old_dentry);
4686 struct inode *new_inode = d_inode(new_dentry);
4687
4688 if (old_inode)
4689 nfs4_inode_make_writeable(old_inode);
4690 if (new_inode)
4691 nfs4_inode_return_delegation(new_inode);
4692 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4693 res->server = NFS_SB(old_dentry->d_sb);
4694 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
4695}
4696
4697static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4698{
4699 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4700 &data->args.seq_args,
4701 &data->res.seq_res,
4702 task);
4703}
4704
4705static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4706 struct inode *new_dir)
4707{
4708 struct nfs_renamedata *data = task->tk_calldata;
4709 struct nfs_renameres *res = &data->res;
4710
4711 if (!nfs4_sequence_done(task, &res->seq_res))
4712 return 0;
4713 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4714 return 0;
4715
4716 if (task->tk_status == 0) {
4717 if (new_dir != old_dir) {
4718
4719 nfs4_update_changeattr(old_dir, &res->old_cinfo,
4720 res->old_fattr->time_start,
4721 NFS_INO_INVALID_OTHER |
4722 NFS_INO_INVALID_DATA);
4723 nfs4_update_changeattr(new_dir, &res->new_cinfo,
4724 res->new_fattr->time_start,
4725 NFS_INO_INVALID_OTHER |
4726 NFS_INO_INVALID_DATA);
4727 } else
4728 nfs4_update_changeattr(old_dir, &res->old_cinfo,
4729 res->old_fattr->time_start,
4730 NFS_INO_INVALID_DATA);
4731 }
4732 return 1;
4733}
4734
4735static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4736{
4737 struct nfs_server *server = NFS_SERVER(inode);
4738 __u32 bitmask[NFS4_BITMASK_SZ];
4739 struct nfs4_link_arg arg = {
4740 .fh = NFS_FH(inode),
4741 .dir_fh = NFS_FH(dir),
4742 .name = name,
4743 .bitmask = bitmask,
4744 };
4745 struct nfs4_link_res res = {
4746 .server = server,
4747 .label = NULL,
4748 };
4749 struct rpc_message msg = {
4750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4751 .rpc_argp = &arg,
4752 .rpc_resp = &res,
4753 };
4754 int status = -ENOMEM;
4755
4756 res.fattr = nfs_alloc_fattr();
4757 if (res.fattr == NULL)
4758 goto out;
4759
4760 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4761 if (IS_ERR(res.label)) {
4762 status = PTR_ERR(res.label);
4763 goto out;
4764 }
4765
4766 nfs4_inode_make_writeable(inode);
4767 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
4768
4769 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4770 if (!status) {
4771 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4772 NFS_INO_INVALID_DATA);
4773 status = nfs_post_op_update_inode(inode, res.fattr);
4774 if (!status)
4775 nfs_setsecurity(inode, res.fattr, res.label);
4776 }
4777
4778
4779 nfs4_label_free(res.label);
4780
4781out:
4782 nfs_free_fattr(res.fattr);
4783 return status;
4784}
4785
4786static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4787{
4788 struct nfs4_exception exception = {
4789 .interruptible = true,
4790 };
4791 int err;
4792 do {
4793 err = nfs4_handle_exception(NFS_SERVER(inode),
4794 _nfs4_proc_link(inode, dir, name),
4795 &exception);
4796 } while (exception.retry);
4797 return err;
4798}
4799
4800struct nfs4_createdata {
4801 struct rpc_message msg;
4802 struct nfs4_create_arg arg;
4803 struct nfs4_create_res res;
4804 struct nfs_fh fh;
4805 struct nfs_fattr fattr;
4806 struct nfs4_label *label;
4807};
4808
4809static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4810 const struct qstr *name, struct iattr *sattr, u32 ftype)
4811{
4812 struct nfs4_createdata *data;
4813
4814 data = kzalloc(sizeof(*data), GFP_KERNEL);
4815 if (data != NULL) {
4816 struct nfs_server *server = NFS_SERVER(dir);
4817
4818 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4819 if (IS_ERR(data->label))
4820 goto out_free;
4821
4822 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4823 data->msg.rpc_argp = &data->arg;
4824 data->msg.rpc_resp = &data->res;
4825 data->arg.dir_fh = NFS_FH(dir);
4826 data->arg.server = server;
4827 data->arg.name = name;
4828 data->arg.attrs = sattr;
4829 data->arg.ftype = ftype;
4830 data->arg.bitmask = nfs4_bitmask(server, data->label);
4831 data->arg.umask = current_umask();
4832 data->res.server = server;
4833 data->res.fh = &data->fh;
4834 data->res.fattr = &data->fattr;
4835 data->res.label = data->label;
4836 nfs_fattr_init(data->res.fattr);
4837 }
4838 return data;
4839out_free:
4840 kfree(data);
4841 return NULL;
4842}
4843
4844static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4845{
4846 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4847 &data->arg.seq_args, &data->res.seq_res, 1);
4848 if (status == 0) {
4849 spin_lock(&dir->i_lock);
4850 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
4851 data->res.fattr->time_start,
4852 NFS_INO_INVALID_DATA);
4853
4854 if (data->arg.ftype == NF4DIR)
4855 nfs4_inc_nlink_locked(dir);
4856 spin_unlock(&dir->i_lock);
4857 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4858 }
4859 return status;
4860}
4861
4862static void nfs4_free_createdata(struct nfs4_createdata *data)
4863{
4864 nfs4_label_free(data->label);
4865 kfree(data);
4866}
4867
4868static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4869 struct page *page, unsigned int len, struct iattr *sattr,
4870 struct nfs4_label *label)
4871{
4872 struct nfs4_createdata *data;
4873 int status = -ENAMETOOLONG;
4874
4875 if (len > NFS4_MAXPATHLEN)
4876 goto out;
4877
4878 status = -ENOMEM;
4879 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4880 if (data == NULL)
4881 goto out;
4882
4883 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4884 data->arg.u.symlink.pages = &page;
4885 data->arg.u.symlink.len = len;
4886 data->arg.label = label;
4887
4888 status = nfs4_do_create(dir, dentry, data);
4889
4890 nfs4_free_createdata(data);
4891out:
4892 return status;
4893}
4894
4895static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4896 struct page *page, unsigned int len, struct iattr *sattr)
4897{
4898 struct nfs4_exception exception = {
4899 .interruptible = true,
4900 };
4901 struct nfs4_label l, *label = NULL;
4902 int err;
4903
4904 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4905
4906 do {
4907 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4908 trace_nfs4_symlink(dir, &dentry->d_name, err);
4909 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4910 &exception);
4911 } while (exception.retry);
4912
4913 nfs4_label_release_security(label);
4914 return err;
4915}
4916
4917static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4918 struct iattr *sattr, struct nfs4_label *label)
4919{
4920 struct nfs4_createdata *data;
4921 int status = -ENOMEM;
4922
4923 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4924 if (data == NULL)
4925 goto out;
4926
4927 data->arg.label = label;
4928 status = nfs4_do_create(dir, dentry, data);
4929
4930 nfs4_free_createdata(data);
4931out:
4932 return status;
4933}
4934
4935static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4936 struct iattr *sattr)
4937{
4938 struct nfs_server *server = NFS_SERVER(dir);
4939 struct nfs4_exception exception = {
4940 .interruptible = true,
4941 };
4942 struct nfs4_label l, *label = NULL;
4943 int err;
4944
4945 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4946
4947 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4948 sattr->ia_mode &= ~current_umask();
4949 do {
4950 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4951 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4952 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4953 &exception);
4954 } while (exception.retry);
4955 nfs4_label_release_security(label);
4956
4957 return err;
4958}
4959
4960static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4961 u64 cookie, struct page **pages, unsigned int count, bool plus)
4962{
4963 struct inode *dir = d_inode(dentry);
4964 struct nfs4_readdir_arg args = {
4965 .fh = NFS_FH(dir),
4966 .pages = pages,
4967 .pgbase = 0,
4968 .count = count,
4969 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4970 .plus = plus,
4971 };
4972 struct nfs4_readdir_res res;
4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4975 .rpc_argp = &args,
4976 .rpc_resp = &res,
4977 .rpc_cred = cred,
4978 };
4979 int status;
4980
4981 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4982 dentry,
4983 (unsigned long long)cookie);
4984 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4985 res.pgbase = args.pgbase;
4986 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4987 if (status >= 0) {
4988 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4989 status += args.pgbase;
4990 }
4991
4992 nfs_invalidate_atime(dir);
4993
4994 dprintk("%s: returns %d\n", __func__, status);
4995 return status;
4996}
4997
4998static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4999 u64 cookie, struct page **pages, unsigned int count, bool plus)
5000{
5001 struct nfs4_exception exception = {
5002 .interruptible = true,
5003 };
5004 int err;
5005 do {
5006 err = _nfs4_proc_readdir(dentry, cred, cookie,
5007 pages, count, plus);
5008 trace_nfs4_readdir(d_inode(dentry), err);
5009 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
5010 &exception);
5011 } while (exception.retry);
5012 return err;
5013}
5014
5015static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5016 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
5017{
5018 struct nfs4_createdata *data;
5019 int mode = sattr->ia_mode;
5020 int status = -ENOMEM;
5021
5022 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5023 if (data == NULL)
5024 goto out;
5025
5026 if (S_ISFIFO(mode))
5027 data->arg.ftype = NF4FIFO;
5028 else if (S_ISBLK(mode)) {
5029 data->arg.ftype = NF4BLK;
5030 data->arg.u.device.specdata1 = MAJOR(rdev);
5031 data->arg.u.device.specdata2 = MINOR(rdev);
5032 }
5033 else if (S_ISCHR(mode)) {
5034 data->arg.ftype = NF4CHR;
5035 data->arg.u.device.specdata1 = MAJOR(rdev);
5036 data->arg.u.device.specdata2 = MINOR(rdev);
5037 } else if (!S_ISSOCK(mode)) {
5038 status = -EINVAL;
5039 goto out_free;
5040 }
5041
5042 data->arg.label = label;
5043 status = nfs4_do_create(dir, dentry, data);
5044out_free:
5045 nfs4_free_createdata(data);
5046out:
5047 return status;
5048}
5049
5050static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5051 struct iattr *sattr, dev_t rdev)
5052{
5053 struct nfs_server *server = NFS_SERVER(dir);
5054 struct nfs4_exception exception = {
5055 .interruptible = true,
5056 };
5057 struct nfs4_label l, *label = NULL;
5058 int err;
5059
5060 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5061
5062 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5063 sattr->ia_mode &= ~current_umask();
5064 do {
5065 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5066 trace_nfs4_mknod(dir, &dentry->d_name, err);
5067 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5068 &exception);
5069 } while (exception.retry);
5070
5071 nfs4_label_release_security(label);
5072
5073 return err;
5074}
5075
5076static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5077 struct nfs_fsstat *fsstat)
5078{
5079 struct nfs4_statfs_arg args = {
5080 .fh = fhandle,
5081 .bitmask = server->attr_bitmask,
5082 };
5083 struct nfs4_statfs_res res = {
5084 .fsstat = fsstat,
5085 };
5086 struct rpc_message msg = {
5087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5088 .rpc_argp = &args,
5089 .rpc_resp = &res,
5090 };
5091
5092 nfs_fattr_init(fsstat->fattr);
5093 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5094}
5095
5096static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5097{
5098 struct nfs4_exception exception = {
5099 .interruptible = true,
5100 };
5101 int err;
5102 do {
5103 err = nfs4_handle_exception(server,
5104 _nfs4_proc_statfs(server, fhandle, fsstat),
5105 &exception);
5106 } while (exception.retry);
5107 return err;
5108}
5109
5110static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5111 struct nfs_fsinfo *fsinfo)
5112{
5113 struct nfs4_fsinfo_arg args = {
5114 .fh = fhandle,
5115 .bitmask = server->attr_bitmask,
5116 };
5117 struct nfs4_fsinfo_res res = {
5118 .fsinfo = fsinfo,
5119 };
5120 struct rpc_message msg = {
5121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5122 .rpc_argp = &args,
5123 .rpc_resp = &res,
5124 };
5125
5126 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5127}
5128
5129static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5130{
5131 struct nfs4_exception exception = {
5132 .interruptible = true,
5133 };
5134 int err;
5135
5136 do {
5137 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
5138 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
5139 if (err == 0) {
5140 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
5141 break;
5142 }
5143 err = nfs4_handle_exception(server, err, &exception);
5144 } while (exception.retry);
5145 return err;
5146}
5147
5148static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5149{
5150 int error;
5151
5152 nfs_fattr_init(fsinfo->fattr);
5153 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
5154 if (error == 0) {
5155
5156 server->pnfs_blksize = fsinfo->blksize;
5157 set_pnfs_layoutdriver(server, fhandle, fsinfo);
5158 }
5159
5160 return error;
5161}
5162
5163static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5164 struct nfs_pathconf *pathconf)
5165{
5166 struct nfs4_pathconf_arg args = {
5167 .fh = fhandle,
5168 .bitmask = server->attr_bitmask,
5169 };
5170 struct nfs4_pathconf_res res = {
5171 .pathconf = pathconf,
5172 };
5173 struct rpc_message msg = {
5174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5175 .rpc_argp = &args,
5176 .rpc_resp = &res,
5177 };
5178
5179
5180 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5181 memset(pathconf, 0, sizeof(*pathconf));
5182 return 0;
5183 }
5184
5185 nfs_fattr_init(pathconf->fattr);
5186 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5187}
5188
5189static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5190 struct nfs_pathconf *pathconf)
5191{
5192 struct nfs4_exception exception = {
5193 .interruptible = true,
5194 };
5195 int err;
5196
5197 do {
5198 err = nfs4_handle_exception(server,
5199 _nfs4_proc_pathconf(server, fhandle, pathconf),
5200 &exception);
5201 } while (exception.retry);
5202 return err;
5203}
5204
5205int nfs4_set_rw_stateid(nfs4_stateid *stateid,
5206 const struct nfs_open_context *ctx,
5207 const struct nfs_lock_context *l_ctx,
5208 fmode_t fmode)
5209{
5210 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
5211}
5212EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5213
5214static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5215 const struct nfs_open_context *ctx,
5216 const struct nfs_lock_context *l_ctx,
5217 fmode_t fmode)
5218{
5219 nfs4_stateid _current_stateid;
5220
5221
5222 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
5223 return true;
5224 return nfs4_stateid_match(stateid, &_current_stateid);
5225}
5226
5227static bool nfs4_error_stateid_expired(int err)
5228{
5229 switch (err) {
5230 case -NFS4ERR_DELEG_REVOKED:
5231 case -NFS4ERR_ADMIN_REVOKED:
5232 case -NFS4ERR_BAD_STATEID:
5233 case -NFS4ERR_STALE_STATEID:
5234 case -NFS4ERR_OLD_STATEID:
5235 case -NFS4ERR_OPENMODE:
5236 case -NFS4ERR_EXPIRED:
5237 return true;
5238 }
5239 return false;
5240}
5241
5242static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
5243{
5244 struct nfs_server *server = NFS_SERVER(hdr->inode);
5245
5246 trace_nfs4_read(hdr, task->tk_status);
5247 if (task->tk_status < 0) {
5248 struct nfs4_exception exception = {
5249 .inode = hdr->inode,
5250 .state = hdr->args.context->state,
5251 .stateid = &hdr->args.stateid,
5252 };
5253 task->tk_status = nfs4_async_handle_exception(task,
5254 server, task->tk_status, &exception);
5255 if (exception.retry) {
5256 rpc_restart_call_prepare(task);
5257 return -EAGAIN;
5258 }
5259 }
5260
5261 if (task->tk_status > 0)
5262 renew_lease(server, hdr->timestamp);
5263 return 0;
5264}
5265
5266static bool nfs4_read_stateid_changed(struct rpc_task *task,
5267 struct nfs_pgio_args *args)
5268{
5269
5270 if (!nfs4_error_stateid_expired(task->tk_status) ||
5271 nfs4_stateid_is_current(&args->stateid,
5272 args->context,
5273 args->lock_context,
5274 FMODE_READ))
5275 return false;
5276 rpc_restart_call_prepare(task);
5277 return true;
5278}
5279
5280static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5281 struct nfs_pgio_header *hdr)
5282{
5283 struct nfs_server *server = NFS_SERVER(hdr->inode);
5284 struct rpc_message *msg = &task->tk_msg;
5285
5286 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
5287 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
5288 server->caps &= ~NFS_CAP_READ_PLUS;
5289 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5290 rpc_restart_call_prepare(task);
5291 return true;
5292 }
5293 return false;
5294}
5295
5296static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5297{
5298 dprintk("--> %s\n", __func__);
5299
5300 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5301 return -EAGAIN;
5302 if (nfs4_read_stateid_changed(task, &hdr->args))
5303 return -EAGAIN;
5304 if (nfs4_read_plus_not_supported(task, hdr))
5305 return -EAGAIN;
5306 if (task->tk_status > 0)
5307 nfs_invalidate_atime(hdr->inode);
5308 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5309 nfs4_read_done_cb(task, hdr);
5310}
5311
5312#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
5313static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg)
5314{
5315 if (server->caps & NFS_CAP_READ_PLUS)
5316 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
5317 else
5318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5319}
5320#else
5321static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg)
5322{
5323 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5324}
5325#endif
5326
5327static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5328 struct rpc_message *msg)
5329{
5330 hdr->timestamp = jiffies;
5331 if (!hdr->pgio_done_cb)
5332 hdr->pgio_done_cb = nfs4_read_done_cb;
5333 nfs42_read_plus_support(NFS_SERVER(hdr->inode), msg);
5334 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5335}
5336
5337static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5338 struct nfs_pgio_header *hdr)
5339{
5340 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
5341 &hdr->args.seq_args,
5342 &hdr->res.seq_res,
5343 task))
5344 return 0;
5345 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5346 hdr->args.lock_context,
5347 hdr->rw_mode) == -EIO)
5348 return -EIO;
5349 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
5350 return -EIO;
5351 return 0;
5352}
5353
5354static int nfs4_write_done_cb(struct rpc_task *task,
5355 struct nfs_pgio_header *hdr)
5356{
5357 struct inode *inode = hdr->inode;
5358
5359 trace_nfs4_write(hdr, task->tk_status);
5360 if (task->tk_status < 0) {
5361 struct nfs4_exception exception = {
5362 .inode = hdr->inode,
5363 .state = hdr->args.context->state,
5364 .stateid = &hdr->args.stateid,
5365 };
5366 task->tk_status = nfs4_async_handle_exception(task,
5367 NFS_SERVER(inode), task->tk_status,
5368 &exception);
5369 if (exception.retry) {
5370 rpc_restart_call_prepare(task);
5371 return -EAGAIN;
5372 }
5373 }
5374 if (task->tk_status >= 0) {
5375 renew_lease(NFS_SERVER(inode), hdr->timestamp);
5376 nfs_writeback_update_inode(hdr);
5377 }
5378 return 0;
5379}
5380
5381static bool nfs4_write_stateid_changed(struct rpc_task *task,
5382 struct nfs_pgio_args *args)
5383{
5384
5385 if (!nfs4_error_stateid_expired(task->tk_status) ||
5386 nfs4_stateid_is_current(&args->stateid,
5387 args->context,
5388 args->lock_context,
5389 FMODE_WRITE))
5390 return false;
5391 rpc_restart_call_prepare(task);
5392 return true;
5393}
5394
5395static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5396{
5397 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5398 return -EAGAIN;
5399 if (nfs4_write_stateid_changed(task, &hdr->args))
5400 return -EAGAIN;
5401 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5402 nfs4_write_done_cb(task, hdr);
5403}
5404
5405static
5406bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
5407{
5408
5409 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5410 return false;
5411
5412
5413
5414 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
5415}
5416
5417static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode,
5418 struct nfs_server *server,
5419 struct nfs4_label *label)
5420{
5421
5422 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
5423
5424 if ((cache_validity & NFS_INO_INVALID_DATA) ||
5425 (cache_validity & NFS_INO_REVAL_PAGECACHE) ||
5426 (cache_validity & NFS_INO_REVAL_FORCED) ||
5427 (cache_validity & NFS_INO_INVALID_OTHER))
5428 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
5429
5430 if (cache_validity & NFS_INO_INVALID_ATIME)
5431 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
5432 if (cache_validity & NFS_INO_INVALID_ACCESS)
5433 bitmask[0] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER |
5434 FATTR4_WORD1_OWNER_GROUP;
5435 if (cache_validity & NFS_INO_INVALID_ACL)
5436 bitmask[0] |= FATTR4_WORD0_ACL;
5437 if (cache_validity & NFS_INO_INVALID_LABEL)
5438 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL;
5439 if (cache_validity & NFS_INO_INVALID_CTIME)
5440 bitmask[0] |= FATTR4_WORD0_CHANGE;
5441 if (cache_validity & NFS_INO_INVALID_MTIME)
5442 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
5443 if (cache_validity & NFS_INO_INVALID_SIZE)
5444 bitmask[0] |= FATTR4_WORD0_SIZE;
5445 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5446 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
5447}
5448
5449static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
5450 struct rpc_message *msg,
5451 struct rpc_clnt **clnt)
5452{
5453 struct nfs_server *server = NFS_SERVER(hdr->inode);
5454
5455 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5456 hdr->args.bitmask = NULL;
5457 hdr->res.fattr = NULL;
5458 } else {
5459 hdr->args.bitmask = server->cache_consistency_bitmask;
5460 nfs4_bitmask_adjust(hdr->args.bitmask, hdr->inode, server, NULL);
5461 }
5462
5463 if (!hdr->pgio_done_cb)
5464 hdr->pgio_done_cb = nfs4_write_done_cb;
5465 hdr->res.server = server;
5466 hdr->timestamp = jiffies;
5467
5468 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
5469 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5470 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
5471}
5472
5473static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
5474{
5475 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
5476 &data->args.seq_args,
5477 &data->res.seq_res,
5478 task);
5479}
5480
5481static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
5482{
5483 struct inode *inode = data->inode;
5484
5485 trace_nfs4_commit(data, task->tk_status);
5486 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5487 NULL, NULL) == -EAGAIN) {
5488 rpc_restart_call_prepare(task);
5489 return -EAGAIN;
5490 }
5491 return 0;
5492}
5493
5494static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5495{
5496 if (!nfs4_sequence_done(task, &data->res.seq_res))
5497 return -EAGAIN;
5498 return data->commit_done_cb(task, data);
5499}
5500
5501static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5502 struct rpc_clnt **clnt)
5503{
5504 struct nfs_server *server = NFS_SERVER(data->inode);
5505
5506 if (data->commit_done_cb == NULL)
5507 data->commit_done_cb = nfs4_commit_done_cb;
5508 data->res.server = server;
5509 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
5510 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5511 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
5512}
5513
5514static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5515 struct nfs_commitres *res)
5516{
5517 struct inode *dst_inode = file_inode(dst);
5518 struct nfs_server *server = NFS_SERVER(dst_inode);
5519 struct rpc_message msg = {
5520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5521 .rpc_argp = args,
5522 .rpc_resp = res,
5523 };
5524
5525 args->fh = NFS_FH(dst_inode);
5526 return nfs4_call_sync(server->client, server, &msg,
5527 &args->seq_args, &res->seq_res, 1);
5528}
5529
5530int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5531{
5532 struct nfs_commitargs args = {
5533 .offset = offset,
5534 .count = count,
5535 };
5536 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5537 struct nfs4_exception exception = { };
5538 int status;
5539
5540 do {
5541 status = _nfs4_proc_commit(dst, &args, res);
5542 status = nfs4_handle_exception(dst_server, status, &exception);
5543 } while (exception.retry);
5544
5545 return status;
5546}
5547
5548struct nfs4_renewdata {
5549 struct nfs_client *client;
5550 unsigned long timestamp;
5551};
5552
5553
5554
5555
5556
5557static void nfs4_renew_release(void *calldata)
5558{
5559 struct nfs4_renewdata *data = calldata;
5560 struct nfs_client *clp = data->client;
5561
5562 if (refcount_read(&clp->cl_count) > 1)
5563 nfs4_schedule_state_renewal(clp);
5564 nfs_put_client(clp);
5565 kfree(data);
5566}
5567
5568static void nfs4_renew_done(struct rpc_task *task, void *calldata)
5569{
5570 struct nfs4_renewdata *data = calldata;
5571 struct nfs_client *clp = data->client;
5572 unsigned long timestamp = data->timestamp;
5573
5574 trace_nfs4_renew_async(clp, task->tk_status);
5575 switch (task->tk_status) {
5576 case 0:
5577 break;
5578 case -NFS4ERR_LEASE_MOVED:
5579 nfs4_schedule_lease_moved_recovery(clp);
5580 break;
5581 default:
5582
5583 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5584 return;
5585 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5586 nfs4_schedule_lease_recovery(clp);
5587 return;
5588 }
5589 nfs4_schedule_path_down_recovery(clp);
5590 }
5591 do_renew_lease(clp, timestamp);
5592}
5593
5594static const struct rpc_call_ops nfs4_renew_ops = {
5595 .rpc_call_done = nfs4_renew_done,
5596 .rpc_release = nfs4_renew_release,
5597};
5598
5599static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
5600{
5601 struct rpc_message msg = {
5602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5603 .rpc_argp = clp,
5604 .rpc_cred = cred,
5605 };
5606 struct nfs4_renewdata *data;
5607
5608 if (renew_flags == 0)
5609 return 0;
5610 if (!refcount_inc_not_zero(&clp->cl_count))
5611 return -EIO;
5612 data = kmalloc(sizeof(*data), GFP_NOFS);
5613 if (data == NULL) {
5614 nfs_put_client(clp);
5615 return -ENOMEM;
5616 }
5617 data->client = clp;
5618 data->timestamp = jiffies;
5619 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5620 &nfs4_renew_ops, data);
5621}
5622
5623static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
5624{
5625 struct rpc_message msg = {
5626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5627 .rpc_argp = clp,
5628 .rpc_cred = cred,
5629 };
5630 unsigned long now = jiffies;
5631 int status;
5632
5633 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5634 if (status < 0)
5635 return status;
5636 do_renew_lease(clp, now);
5637 return 0;
5638}
5639
5640static inline int nfs4_server_supports_acls(struct nfs_server *server)
5641{
5642 return server->caps & NFS_CAP_ACLS;
5643}
5644
5645
5646
5647
5648
5649#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5650
5651int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
5652 struct page **pages)
5653{
5654 struct page *newpage, **spages;
5655 int rc = 0;
5656 size_t len;
5657 spages = pages;
5658
5659 do {
5660 len = min_t(size_t, PAGE_SIZE, buflen);
5661 newpage = alloc_page(GFP_KERNEL);
5662
5663 if (newpage == NULL)
5664 goto unwind;
5665 memcpy(page_address(newpage), buf, len);
5666 buf += len;
5667 buflen -= len;
5668 *pages++ = newpage;
5669 rc++;
5670 } while (buflen != 0);
5671
5672 return rc;
5673
5674unwind:
5675 for(; rc > 0; rc--)
5676 __free_page(spages[rc-1]);
5677 return -ENOMEM;
5678}
5679
5680struct nfs4_cached_acl {
5681 int cached;
5682 size_t len;
5683 char data[];
5684};
5685
5686static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5687{
5688 struct nfs_inode *nfsi = NFS_I(inode);
5689
5690 spin_lock(&inode->i_lock);
5691 kfree(nfsi->nfs4_acl);
5692 nfsi->nfs4_acl = acl;
5693 spin_unlock(&inode->i_lock);
5694}
5695
5696static void nfs4_zap_acl_attr(struct inode *inode)
5697{
5698 nfs4_set_cached_acl(inode, NULL);
5699}
5700
5701static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5702{
5703 struct nfs_inode *nfsi = NFS_I(inode);
5704 struct nfs4_cached_acl *acl;
5705 int ret = -ENOENT;
5706
5707 spin_lock(&inode->i_lock);
5708 acl = nfsi->nfs4_acl;
5709 if (acl == NULL)
5710 goto out;
5711 if (buf == NULL)
5712 goto out_len;
5713 if (acl->cached == 0)
5714 goto out;
5715 ret = -ERANGE;
5716 if (acl->len > buflen)
5717 goto out;
5718 memcpy(buf, acl->data, acl->len);
5719out_len:
5720 ret = acl->len;
5721out:
5722 spin_unlock(&inode->i_lock);
5723 return ret;
5724}
5725
5726static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5727{
5728 struct nfs4_cached_acl *acl;
5729 size_t buflen = sizeof(*acl) + acl_len;
5730
5731 if (buflen <= PAGE_SIZE) {
5732 acl = kmalloc(buflen, GFP_KERNEL);
5733 if (acl == NULL)
5734 goto out;
5735 acl->cached = 1;
5736 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5737 } else {
5738 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5739 if (acl == NULL)
5740 goto out;
5741 acl->cached = 0;
5742 }
5743 acl->len = acl_len;
5744out:
5745 nfs4_set_cached_acl(inode, acl);
5746}
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5759{
5760 struct page **pages;
5761 struct nfs_getaclargs args = {
5762 .fh = NFS_FH(inode),
5763 .acl_len = buflen,
5764 };
5765 struct nfs_getaclres res = {
5766 .acl_len = buflen,
5767 };
5768 struct rpc_message msg = {
5769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5770 .rpc_argp = &args,
5771 .rpc_resp = &res,
5772 };
5773 unsigned int npages;
5774 int ret = -ENOMEM, i;
5775 struct nfs_server *server = NFS_SERVER(inode);
5776
5777 if (buflen == 0)
5778 buflen = server->rsize;
5779
5780 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5781 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS);
5782 if (!pages)
5783 return -ENOMEM;
5784
5785 args.acl_pages = pages;
5786
5787 for (i = 0; i < npages; i++) {
5788 pages[i] = alloc_page(GFP_KERNEL);
5789 if (!pages[i])
5790 goto out_free;
5791 }
5792
5793
5794 res.acl_scratch = alloc_page(GFP_KERNEL);
5795 if (!res.acl_scratch)
5796 goto out_free;
5797
5798 args.acl_len = npages * PAGE_SIZE;
5799
5800 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5801 __func__, buf, buflen, npages, args.acl_len);
5802 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5803 &msg, &args.seq_args, &res.seq_res, 0);
5804 if (ret)
5805 goto out_free;
5806
5807
5808 if (res.acl_flags & NFS4_ACL_TRUNC) {
5809
5810 if (buf == NULL)
5811 goto out_ok;
5812 ret = -ERANGE;
5813 goto out_free;
5814 }
5815 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5816 if (buf) {
5817 if (res.acl_len > buflen) {
5818 ret = -ERANGE;
5819 goto out_free;
5820 }
5821 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5822 }
5823out_ok:
5824 ret = res.acl_len;
5825out_free:
5826 for (i = 0; i < npages; i++)
5827 if (pages[i])
5828 __free_page(pages[i]);
5829 if (res.acl_scratch)
5830 __free_page(res.acl_scratch);
5831 kfree(pages);
5832 return ret;
5833}
5834
5835static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5836{
5837 struct nfs4_exception exception = {
5838 .interruptible = true,
5839 };
5840 ssize_t ret;
5841 do {
5842 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5843 trace_nfs4_get_acl(inode, ret);
5844 if (ret >= 0)
5845 break;
5846 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5847 } while (exception.retry);
5848 return ret;
5849}
5850
5851static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5852{
5853 struct nfs_server *server = NFS_SERVER(inode);
5854 int ret;
5855
5856 if (!nfs4_server_supports_acls(server))
5857 return -EOPNOTSUPP;
5858 ret = nfs_revalidate_inode(server, inode);
5859 if (ret < 0)
5860 return ret;
5861 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5862 nfs_zap_acl_cache(inode);
5863 ret = nfs4_read_cached_acl(inode, buf, buflen);
5864 if (ret != -ENOENT)
5865
5866
5867 return ret;
5868 return nfs4_get_acl_uncached(inode, buf, buflen);
5869}
5870
5871static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5872{
5873 struct nfs_server *server = NFS_SERVER(inode);
5874 struct page *pages[NFS4ACL_MAXPAGES];
5875 struct nfs_setaclargs arg = {
5876 .fh = NFS_FH(inode),
5877 .acl_pages = pages,
5878 .acl_len = buflen,
5879 };
5880 struct nfs_setaclres res;
5881 struct rpc_message msg = {
5882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5883 .rpc_argp = &arg,
5884 .rpc_resp = &res,
5885 };
5886 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5887 int ret, i;
5888
5889 if (!nfs4_server_supports_acls(server))
5890 return -EOPNOTSUPP;
5891 if (npages > ARRAY_SIZE(pages))
5892 return -ERANGE;
5893 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5894 if (i < 0)
5895 return i;
5896 nfs4_inode_make_writeable(inode);
5897 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5898
5899
5900
5901
5902
5903 for (; i > 0; i--)
5904 put_page(pages[i-1]);
5905
5906
5907
5908
5909
5910 spin_lock(&inode->i_lock);
5911 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
5912 | NFS_INO_INVALID_CTIME
5913 | NFS_INO_REVAL_FORCED;
5914 spin_unlock(&inode->i_lock);
5915 nfs_access_zap_cache(inode);
5916 nfs_zap_acl_cache(inode);
5917 return ret;
5918}
5919
5920static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5921{
5922 struct nfs4_exception exception = { };
5923 int err;
5924 do {
5925 err = __nfs4_proc_set_acl(inode, buf, buflen);
5926 trace_nfs4_set_acl(inode, err);
5927 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5928 &exception);
5929 } while (exception.retry);
5930 return err;
5931}
5932
5933#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5934static int _nfs4_get_security_label(struct inode *inode, void *buf,
5935 size_t buflen)
5936{
5937 struct nfs_server *server = NFS_SERVER(inode);
5938 struct nfs_fattr fattr;
5939 struct nfs4_label label = {0, 0, buflen, buf};
5940
5941 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5942 struct nfs4_getattr_arg arg = {
5943 .fh = NFS_FH(inode),
5944 .bitmask = bitmask,
5945 };
5946 struct nfs4_getattr_res res = {
5947 .fattr = &fattr,
5948 .label = &label,
5949 .server = server,
5950 };
5951 struct rpc_message msg = {
5952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5953 .rpc_argp = &arg,
5954 .rpc_resp = &res,
5955 };
5956 int ret;
5957
5958 nfs_fattr_init(&fattr);
5959
5960 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5961 if (ret)
5962 return ret;
5963 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5964 return -ENOENT;
5965 return 0;
5966}
5967
5968static int nfs4_get_security_label(struct inode *inode, void *buf,
5969 size_t buflen)
5970{
5971 struct nfs4_exception exception = {
5972 .interruptible = true,
5973 };
5974 int err;
5975
5976 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5977 return -EOPNOTSUPP;
5978
5979 do {
5980 err = _nfs4_get_security_label(inode, buf, buflen);
5981 trace_nfs4_get_security_label(inode, err);
5982 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5983 &exception);
5984 } while (exception.retry);
5985 return err;
5986}
5987
5988static int _nfs4_do_set_security_label(struct inode *inode,
5989 struct nfs4_label *ilabel,
5990 struct nfs_fattr *fattr,
5991 struct nfs4_label *olabel)
5992{
5993
5994 struct iattr sattr = {0};
5995 struct nfs_server *server = NFS_SERVER(inode);
5996 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5997 struct nfs_setattrargs arg = {
5998 .fh = NFS_FH(inode),
5999 .iap = &sattr,
6000 .server = server,
6001 .bitmask = bitmask,
6002 .label = ilabel,
6003 };
6004 struct nfs_setattrres res = {
6005 .fattr = fattr,
6006 .label = olabel,
6007 .server = server,
6008 };
6009 struct rpc_message msg = {
6010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6011 .rpc_argp = &arg,
6012 .rpc_resp = &res,
6013 };
6014 int status;
6015
6016 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
6017
6018 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6019 if (status)
6020 dprintk("%s failed: %d\n", __func__, status);
6021
6022 return status;
6023}
6024
6025static int nfs4_do_set_security_label(struct inode *inode,
6026 struct nfs4_label *ilabel,
6027 struct nfs_fattr *fattr,
6028 struct nfs4_label *olabel)
6029{
6030 struct nfs4_exception exception = { };
6031 int err;
6032
6033 do {
6034 err = _nfs4_do_set_security_label(inode, ilabel,
6035 fattr, olabel);
6036 trace_nfs4_set_security_label(inode, err);
6037 err = nfs4_handle_exception(NFS_SERVER(inode), err,
6038 &exception);
6039 } while (exception.retry);
6040 return err;
6041}
6042
6043static int
6044nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
6045{
6046 struct nfs4_label ilabel, *olabel = NULL;
6047 struct nfs_fattr fattr;
6048 int status;
6049
6050 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6051 return -EOPNOTSUPP;
6052
6053 nfs_fattr_init(&fattr);
6054
6055 ilabel.pi = 0;
6056 ilabel.lfs = 0;
6057 ilabel.label = (char *)buf;
6058 ilabel.len = buflen;
6059
6060 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
6061 if (IS_ERR(olabel)) {
6062 status = -PTR_ERR(olabel);
6063 goto out;
6064 }
6065
6066 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
6067 if (status == 0)
6068 nfs_setsecurity(inode, &fattr, olabel);
6069
6070 nfs4_label_free(olabel);
6071out:
6072 return status;
6073}
6074#endif
6075
6076
6077static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6078 nfs4_verifier *bootverf)
6079{
6080 __be32 verf[2];
6081
6082 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6083
6084
6085 verf[0] = cpu_to_be32(U32_MAX);
6086 verf[1] = cpu_to_be32(U32_MAX);
6087 } else {
6088 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6089 u64 ns = ktime_to_ns(nn->boot_time);
6090
6091 verf[0] = cpu_to_be32(ns >> 32);
6092 verf[1] = cpu_to_be32(ns);
6093 }
6094 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6095}
6096
6097static size_t
6098nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
6099{
6100 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6101 struct nfs_netns_client *nn_clp = nn->nfs_client;
6102 const char *id;
6103
6104 buf[0] = '\0';
6105
6106 if (nn_clp) {
6107 rcu_read_lock();
6108 id = rcu_dereference(nn_clp->identifier);
6109 if (id)
6110 strscpy(buf, id, buflen);
6111 rcu_read_unlock();
6112 }
6113
6114 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
6115 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6116
6117 return strlen(buf);
6118}
6119
6120static int
6121nfs4_init_nonuniform_client_string(struct nfs_client *clp)
6122{
6123 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6124 size_t buflen;
6125 size_t len;
6126 char *str;
6127
6128 if (clp->cl_owner_id != NULL)
6129 return 0;
6130
6131 rcu_read_lock();
6132 len = 14 +
6133 strlen(clp->cl_rpcclient->cl_nodename) +
6134 1 +
6135 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
6136 1;
6137 rcu_read_unlock();
6138
6139 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
6140 if (buflen)
6141 len += buflen + 1;
6142
6143 if (len > NFS4_OPAQUE_LIMIT + 1)
6144 return -EINVAL;
6145
6146
6147
6148
6149
6150
6151 str = kmalloc(len, GFP_KERNEL);
6152 if (!str)
6153 return -ENOMEM;
6154
6155 rcu_read_lock();
6156 if (buflen)
6157 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
6158 clp->cl_rpcclient->cl_nodename, buf,
6159 rpc_peeraddr2str(clp->cl_rpcclient,
6160 RPC_DISPLAY_ADDR));
6161 else
6162 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
6163 clp->cl_rpcclient->cl_nodename,
6164 rpc_peeraddr2str(clp->cl_rpcclient,
6165 RPC_DISPLAY_ADDR));
6166 rcu_read_unlock();
6167
6168 clp->cl_owner_id = str;
6169 return 0;
6170}
6171
6172static int
6173nfs4_init_uniform_client_string(struct nfs_client *clp)
6174{
6175 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6176 size_t buflen;
6177 size_t len;
6178 char *str;
6179
6180 if (clp->cl_owner_id != NULL)
6181 return 0;
6182
6183 len = 10 + 10 + 1 + 10 + 1 +
6184 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6185
6186 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
6187 if (buflen)
6188 len += buflen + 1;
6189
6190 if (len > NFS4_OPAQUE_LIMIT + 1)
6191 return -EINVAL;
6192
6193
6194
6195
6196
6197
6198 str = kmalloc(len, GFP_KERNEL);
6199 if (!str)
6200 return -ENOMEM;
6201
6202 if (buflen)
6203 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6204 clp->rpc_ops->version, clp->cl_minorversion,
6205 buf, clp->cl_rpcclient->cl_nodename);
6206 else
6207 scnprintf(str, len, "Linux NFSv%u.%u %s",
6208 clp->rpc_ops->version, clp->cl_minorversion,
6209 clp->cl_rpcclient->cl_nodename);
6210 clp->cl_owner_id = str;
6211 return 0;
6212}
6213
6214
6215
6216
6217
6218
6219static unsigned int
6220nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6221{
6222 if (strchr(clp->cl_ipaddr, ':') != NULL)
6223 return scnprintf(buf, len, "tcp6");
6224 else
6225 return scnprintf(buf, len, "tcp");
6226}
6227
6228static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6229{
6230 struct nfs4_setclientid *sc = calldata;
6231
6232 if (task->tk_status == 0)
6233 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6234}
6235
6236static const struct rpc_call_ops nfs4_setclientid_ops = {
6237 .rpc_call_done = nfs4_setclientid_done,
6238};
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
6251 unsigned short port, const struct cred *cred,
6252 struct nfs4_setclientid_res *res)
6253{
6254 nfs4_verifier sc_verifier;
6255 struct nfs4_setclientid setclientid = {
6256 .sc_verifier = &sc_verifier,
6257 .sc_prog = program,
6258 .sc_clnt = clp,
6259 };
6260 struct rpc_message msg = {
6261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6262 .rpc_argp = &setclientid,
6263 .rpc_resp = res,
6264 .rpc_cred = cred,
6265 };
6266 struct rpc_task_setup task_setup_data = {
6267 .rpc_client = clp->cl_rpcclient,
6268 .rpc_message = &msg,
6269 .callback_ops = &nfs4_setclientid_ops,
6270 .callback_data = &setclientid,
6271 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
6272 };
6273 unsigned long now = jiffies;
6274 int status;
6275
6276
6277 nfs4_init_boot_verifier(clp, &sc_verifier);
6278
6279 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6280 status = nfs4_init_uniform_client_string(clp);
6281 else
6282 status = nfs4_init_nonuniform_client_string(clp);
6283
6284 if (status)
6285 goto out;
6286
6287
6288 setclientid.sc_netid_len =
6289 nfs4_init_callback_netid(clp,
6290 setclientid.sc_netid,
6291 sizeof(setclientid.sc_netid));
6292 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
6293 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
6294 clp->cl_ipaddr, port >> 8, port & 255);
6295
6296 dprintk("NFS call setclientid auth=%s, '%s'\n",
6297 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6298 clp->cl_owner_id);
6299
6300 status = nfs4_call_sync_custom(&task_setup_data);
6301 if (setclientid.sc_cred) {
6302 kfree(clp->cl_acceptor);
6303 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6304 put_rpccred(setclientid.sc_cred);
6305 }
6306
6307 if (status == 0)
6308 do_renew_lease(clp, now);
6309out:
6310 trace_nfs4_setclientid(clp, status);
6311 dprintk("NFS reply setclientid: %d\n", status);
6312 return status;
6313}
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
6324 struct nfs4_setclientid_res *arg,
6325 const struct cred *cred)
6326{
6327 struct rpc_message msg = {
6328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
6329 .rpc_argp = arg,
6330 .rpc_cred = cred,
6331 };
6332 int status;
6333
6334 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6335 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6336 clp->cl_clientid);
6337 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6338 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
6339 trace_nfs4_setclientid_confirm(clp, status);
6340 dprintk("NFS reply setclientid_confirm: %d\n", status);
6341 return status;
6342}
6343
6344struct nfs4_delegreturndata {
6345 struct nfs4_delegreturnargs args;
6346 struct nfs4_delegreturnres res;
6347 struct nfs_fh fh;
6348 nfs4_stateid stateid;
6349 unsigned long timestamp;
6350 struct {
6351 struct nfs4_layoutreturn_args arg;
6352 struct nfs4_layoutreturn_res res;
6353 struct nfs4_xdr_opaque_data ld_private;
6354 u32 roc_barrier;
6355 bool roc;
6356 } lr;
6357 struct nfs_fattr fattr;
6358 int rpc_status;
6359 struct inode *inode;
6360};
6361
6362static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6363{
6364 struct nfs4_delegreturndata *data = calldata;
6365 struct nfs4_exception exception = {
6366 .inode = data->inode,
6367 .stateid = &data->stateid,
6368 };
6369
6370 if (!nfs4_sequence_done(task, &data->res.seq_res))
6371 return;
6372
6373 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
6374
6375
6376 if (pnfs_roc_done(task, data->inode,
6377 &data->args.lr_args,
6378 &data->res.lr_res,
6379 &data->res.lr_ret) == -EAGAIN)
6380 goto out_restart;
6381
6382 switch (task->tk_status) {
6383 case 0:
6384 renew_lease(data->res.server, data->timestamp);
6385 break;
6386 case -NFS4ERR_ADMIN_REVOKED:
6387 case -NFS4ERR_DELEG_REVOKED:
6388 case -NFS4ERR_EXPIRED:
6389 nfs4_free_revoked_stateid(data->res.server,
6390 data->args.stateid,
6391 task->tk_msg.rpc_cred);
6392 fallthrough;
6393 case -NFS4ERR_BAD_STATEID:
6394 case -NFS4ERR_STALE_STATEID:
6395 case -ETIMEDOUT:
6396 task->tk_status = 0;
6397 break;
6398 case -NFS4ERR_OLD_STATEID:
6399 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6400 nfs4_stateid_seqid_inc(&data->stateid);
6401 if (data->args.bitmask) {
6402 data->args.bitmask = NULL;
6403 data->res.fattr = NULL;
6404 }
6405 goto out_restart;
6406 case -NFS4ERR_ACCESS:
6407 if (data->args.bitmask) {
6408 data->args.bitmask = NULL;
6409 data->res.fattr = NULL;
6410 goto out_restart;
6411 }
6412 fallthrough;
6413 default:
6414 task->tk_status = nfs4_async_handle_exception(task,
6415 data->res.server, task->tk_status,
6416 &exception);
6417 if (exception.retry)
6418 goto out_restart;
6419 }
6420 nfs_delegation_mark_returned(data->inode, data->args.stateid);
6421 data->rpc_status = task->tk_status;
6422 return;
6423out_restart:
6424 task->tk_status = 0;
6425 rpc_restart_call_prepare(task);
6426}
6427
6428static void nfs4_delegreturn_release(void *calldata)
6429{
6430 struct nfs4_delegreturndata *data = calldata;
6431 struct inode *inode = data->inode;
6432
6433 if (inode) {
6434 if (data->lr.roc)
6435 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6436 data->res.lr_ret);
6437 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
6438 nfs_iput_and_deactive(inode);
6439 }
6440 kfree(calldata);
6441}
6442
6443static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6444{
6445 struct nfs4_delegreturndata *d_data;
6446 struct pnfs_layout_hdr *lo;
6447
6448 d_data = (struct nfs4_delegreturndata *)data;
6449
6450 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6451 nfs4_sequence_done(task, &d_data->res.seq_res);
6452 return;
6453 }
6454
6455 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6456 if (lo && !pnfs_layout_is_valid(lo)) {
6457 d_data->args.lr_args = NULL;
6458 d_data->res.lr_res = NULL;
6459 }
6460
6461 nfs4_setup_sequence(d_data->res.server->nfs_client,
6462 &d_data->args.seq_args,
6463 &d_data->res.seq_res,
6464 task);
6465}
6466
6467static const struct rpc_call_ops nfs4_delegreturn_ops = {
6468 .rpc_call_prepare = nfs4_delegreturn_prepare,
6469 .rpc_call_done = nfs4_delegreturn_done,
6470 .rpc_release = nfs4_delegreturn_release,
6471};
6472
6473static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6474{
6475 struct nfs4_delegreturndata *data;
6476 struct nfs_server *server = NFS_SERVER(inode);
6477 struct rpc_task *task;
6478 struct rpc_message msg = {
6479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6480 .rpc_cred = cred,
6481 };
6482 struct rpc_task_setup task_setup_data = {
6483 .rpc_client = server->client,
6484 .rpc_message = &msg,
6485 .callback_ops = &nfs4_delegreturn_ops,
6486 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6487 };
6488 int status = 0;
6489
6490 data = kzalloc(sizeof(*data), GFP_NOFS);
6491 if (data == NULL)
6492 return -ENOMEM;
6493 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
6494
6495 nfs4_state_protect(server->nfs_client,
6496 NFS_SP4_MACH_CRED_CLEANUP,
6497 &task_setup_data.rpc_client, &msg);
6498
6499 data->args.fhandle = &data->fh;
6500 data->args.stateid = &data->stateid;
6501 data->args.bitmask = server->cache_consistency_bitmask;
6502 nfs4_bitmask_adjust(data->args.bitmask, inode, server, NULL);
6503 nfs_copy_fh(&data->fh, NFS_FH(inode));
6504 nfs4_stateid_copy(&data->stateid, stateid);
6505 data->res.fattr = &data->fattr;
6506 data->res.server = server;
6507 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6508 data->lr.arg.ld_private = &data->lr.ld_private;
6509 nfs_fattr_init(data->res.fattr);
6510 data->timestamp = jiffies;
6511 data->rpc_status = 0;
6512 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
6513 data->inode = nfs_igrab_and_active(inode);
6514 if (data->inode) {
6515 if (data->lr.roc) {
6516 data->args.lr_args = &data->lr.arg;
6517 data->res.lr_res = &data->lr.res;
6518 }
6519 } else if (data->lr.roc) {
6520 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6521 data->lr.roc = false;
6522 }
6523
6524 task_setup_data.callback_data = data;
6525 msg.rpc_argp = &data->args;
6526 msg.rpc_resp = &data->res;
6527 task = rpc_run_task(&task_setup_data);
6528 if (IS_ERR(task))
6529 return PTR_ERR(task);
6530 if (!issync)
6531 goto out;
6532 status = rpc_wait_for_completion_task(task);
6533 if (status != 0)
6534 goto out;
6535 status = data->rpc_status;
6536out:
6537 rpc_put_task(task);
6538 return status;
6539}
6540
6541int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6542{
6543 struct nfs_server *server = NFS_SERVER(inode);
6544 struct nfs4_exception exception = { };
6545 int err;
6546 do {
6547 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
6548 trace_nfs4_delegreturn(inode, stateid, err);
6549 switch (err) {
6550 case -NFS4ERR_STALE_STATEID:
6551 case -NFS4ERR_EXPIRED:
6552 case 0:
6553 return 0;
6554 }
6555 err = nfs4_handle_exception(server, err, &exception);
6556 } while (exception.retry);
6557 return err;
6558}
6559
6560static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6561{
6562 struct inode *inode = state->inode;
6563 struct nfs_server *server = NFS_SERVER(inode);
6564 struct nfs_client *clp = server->nfs_client;
6565 struct nfs_lockt_args arg = {
6566 .fh = NFS_FH(inode),
6567 .fl = request,
6568 };
6569 struct nfs_lockt_res res = {
6570 .denied = request,
6571 };
6572 struct rpc_message msg = {
6573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
6574 .rpc_argp = &arg,
6575 .rpc_resp = &res,
6576 .rpc_cred = state->owner->so_cred,
6577 };
6578 struct nfs4_lock_state *lsp;
6579 int status;
6580
6581 arg.lock_owner.clientid = clp->cl_clientid;
6582 status = nfs4_set_lock_state(state, request);
6583 if (status != 0)
6584 goto out;
6585 lsp = request->fl_u.nfs4_fl.owner;
6586 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6587 arg.lock_owner.s_dev = server->s_dev;
6588 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6589 switch (status) {
6590 case 0:
6591 request->fl_type = F_UNLCK;
6592 break;
6593 case -NFS4ERR_DENIED:
6594 status = 0;
6595 }
6596 request->fl_ops->fl_release_private(request);
6597 request->fl_ops = NULL;
6598out:
6599 return status;
6600}
6601
6602static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6603{
6604 struct nfs4_exception exception = {
6605 .interruptible = true,
6606 };
6607 int err;
6608
6609 do {
6610 err = _nfs4_proc_getlk(state, cmd, request);
6611 trace_nfs4_get_lock(request, state, cmd, err);
6612 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6613 &exception);
6614 } while (exception.retry);
6615 return err;
6616}
6617
6618
6619
6620
6621
6622static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6623 struct nfs4_lock_state *lsp)
6624{
6625 struct nfs4_state *state = lsp->ls_state;
6626 bool ret = false;
6627
6628 spin_lock(&state->state_lock);
6629 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6630 goto out;
6631 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6632 nfs4_stateid_seqid_inc(dst);
6633 else
6634 dst->seqid = lsp->ls_stateid.seqid;
6635 ret = true;
6636out:
6637 spin_unlock(&state->state_lock);
6638 return ret;
6639}
6640
6641static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6642 struct nfs4_lock_state *lsp)
6643{
6644 struct nfs4_state *state = lsp->ls_state;
6645 bool ret;
6646
6647 spin_lock(&state->state_lock);
6648 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6649 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6650 spin_unlock(&state->state_lock);
6651 return ret;
6652}
6653
6654struct nfs4_unlockdata {
6655 struct nfs_locku_args arg;
6656 struct nfs_locku_res res;
6657 struct nfs4_lock_state *lsp;
6658 struct nfs_open_context *ctx;
6659 struct nfs_lock_context *l_ctx;
6660 struct file_lock fl;
6661 struct nfs_server *server;
6662 unsigned long timestamp;
6663};
6664
6665static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6666 struct nfs_open_context *ctx,
6667 struct nfs4_lock_state *lsp,
6668 struct nfs_seqid *seqid)
6669{
6670 struct nfs4_unlockdata *p;
6671 struct nfs4_state *state = lsp->ls_state;
6672 struct inode *inode = state->inode;
6673
6674 p = kzalloc(sizeof(*p), GFP_NOFS);
6675 if (p == NULL)
6676 return NULL;
6677 p->arg.fh = NFS_FH(inode);
6678 p->arg.fl = &p->fl;
6679 p->arg.seqid = seqid;
6680 p->res.seqid = seqid;
6681 p->lsp = lsp;
6682
6683 p->ctx = get_nfs_open_context(ctx);
6684 p->l_ctx = nfs_get_lock_context(ctx);
6685 locks_init_lock(&p->fl);
6686 locks_copy_lock(&p->fl, fl);
6687 p->server = NFS_SERVER(inode);
6688 spin_lock(&state->state_lock);
6689 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6690 spin_unlock(&state->state_lock);
6691 return p;
6692}
6693
6694static void nfs4_locku_release_calldata(void *data)
6695{
6696 struct nfs4_unlockdata *calldata = data;
6697 nfs_free_seqid(calldata->arg.seqid);
6698 nfs4_put_lock_state(calldata->lsp);
6699 nfs_put_lock_context(calldata->l_ctx);
6700 put_nfs_open_context(calldata->ctx);
6701 kfree(calldata);
6702}
6703
6704static void nfs4_locku_done(struct rpc_task *task, void *data)
6705{
6706 struct nfs4_unlockdata *calldata = data;
6707 struct nfs4_exception exception = {
6708 .inode = calldata->lsp->ls_state->inode,
6709 .stateid = &calldata->arg.stateid,
6710 };
6711
6712 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6713 return;
6714 switch (task->tk_status) {
6715 case 0:
6716 renew_lease(calldata->server, calldata->timestamp);
6717 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6718 if (nfs4_update_lock_stateid(calldata->lsp,
6719 &calldata->res.stateid))
6720 break;
6721 fallthrough;
6722 case -NFS4ERR_ADMIN_REVOKED:
6723 case -NFS4ERR_EXPIRED:
6724 nfs4_free_revoked_stateid(calldata->server,
6725 &calldata->arg.stateid,
6726 task->tk_msg.rpc_cred);
6727 fallthrough;
6728 case -NFS4ERR_BAD_STATEID:
6729 case -NFS4ERR_STALE_STATEID:
6730 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6731 calldata->lsp))
6732 rpc_restart_call_prepare(task);
6733 break;
6734 case -NFS4ERR_OLD_STATEID:
6735 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6736 calldata->lsp))
6737 rpc_restart_call_prepare(task);
6738 break;
6739 default:
6740 task->tk_status = nfs4_async_handle_exception(task,
6741 calldata->server, task->tk_status,
6742 &exception);
6743 if (exception.retry)
6744 rpc_restart_call_prepare(task);
6745 }
6746 nfs_release_seqid(calldata->arg.seqid);
6747}
6748
6749static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6750{
6751 struct nfs4_unlockdata *calldata = data;
6752
6753 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6754 nfs_async_iocounter_wait(task, calldata->l_ctx))
6755 return;
6756
6757 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6758 goto out_wait;
6759 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6760
6761 goto out_no_action;
6762 }
6763 calldata->timestamp = jiffies;
6764 if (nfs4_setup_sequence(calldata->server->nfs_client,
6765 &calldata->arg.seq_args,
6766 &calldata->res.seq_res,
6767 task) != 0)
6768 nfs_release_seqid(calldata->arg.seqid);
6769 return;
6770out_no_action:
6771 task->tk_action = NULL;
6772out_wait:
6773 nfs4_sequence_done(task, &calldata->res.seq_res);
6774}
6775
6776static const struct rpc_call_ops nfs4_locku_ops = {
6777 .rpc_call_prepare = nfs4_locku_prepare,
6778 .rpc_call_done = nfs4_locku_done,
6779 .rpc_release = nfs4_locku_release_calldata,
6780};
6781
6782static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6783 struct nfs_open_context *ctx,
6784 struct nfs4_lock_state *lsp,
6785 struct nfs_seqid *seqid)
6786{
6787 struct nfs4_unlockdata *data;
6788 struct rpc_message msg = {
6789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6790 .rpc_cred = ctx->cred,
6791 };
6792 struct rpc_task_setup task_setup_data = {
6793 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6794 .rpc_message = &msg,
6795 .callback_ops = &nfs4_locku_ops,
6796 .workqueue = nfsiod_workqueue,
6797 .flags = RPC_TASK_ASYNC,
6798 };
6799
6800 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6801 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6802
6803
6804
6805
6806 fl->fl_type = F_UNLCK;
6807 if (fl->fl_flags & FL_CLOSE)
6808 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
6809
6810 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6811 if (data == NULL) {
6812 nfs_free_seqid(seqid);
6813 return ERR_PTR(-ENOMEM);
6814 }
6815
6816 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
6817 msg.rpc_argp = &data->arg;
6818 msg.rpc_resp = &data->res;
6819 task_setup_data.callback_data = data;
6820 return rpc_run_task(&task_setup_data);
6821}
6822
6823static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6824{
6825 struct inode *inode = state->inode;
6826 struct nfs4_state_owner *sp = state->owner;
6827 struct nfs_inode *nfsi = NFS_I(inode);
6828 struct nfs_seqid *seqid;
6829 struct nfs4_lock_state *lsp;
6830 struct rpc_task *task;
6831 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6832 int status = 0;
6833 unsigned char fl_flags = request->fl_flags;
6834
6835 status = nfs4_set_lock_state(state, request);
6836
6837 request->fl_flags |= FL_EXISTS;
6838
6839 mutex_lock(&sp->so_delegreturn_mutex);
6840
6841 down_read(&nfsi->rwsem);
6842 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6843 up_read(&nfsi->rwsem);
6844 mutex_unlock(&sp->so_delegreturn_mutex);
6845 goto out;
6846 }
6847 up_read(&nfsi->rwsem);
6848 mutex_unlock(&sp->so_delegreturn_mutex);
6849 if (status != 0)
6850 goto out;
6851
6852 lsp = request->fl_u.nfs4_fl.owner;
6853 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6854 goto out;
6855 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6856 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6857 status = -ENOMEM;
6858 if (IS_ERR(seqid))
6859 goto out;
6860 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6861 status = PTR_ERR(task);
6862 if (IS_ERR(task))
6863 goto out;
6864 status = rpc_wait_for_completion_task(task);
6865 rpc_put_task(task);
6866out:
6867 request->fl_flags = fl_flags;
6868 trace_nfs4_unlock(request, state, F_SETLK, status);
6869 return status;
6870}
6871
6872struct nfs4_lockdata {
6873 struct nfs_lock_args arg;
6874 struct nfs_lock_res res;
6875 struct nfs4_lock_state *lsp;
6876 struct nfs_open_context *ctx;
6877 struct file_lock fl;
6878 unsigned long timestamp;
6879 int rpc_status;
6880 int cancelled;
6881 struct nfs_server *server;
6882};
6883
6884static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6885 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6886 gfp_t gfp_mask)
6887{
6888 struct nfs4_lockdata *p;
6889 struct inode *inode = lsp->ls_state->inode;
6890 struct nfs_server *server = NFS_SERVER(inode);
6891 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6892
6893 p = kzalloc(sizeof(*p), gfp_mask);
6894 if (p == NULL)
6895 return NULL;
6896
6897 p->arg.fh = NFS_FH(inode);
6898 p->arg.fl = &p->fl;
6899 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6900 if (IS_ERR(p->arg.open_seqid))
6901 goto out_free;
6902 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6903 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6904 if (IS_ERR(p->arg.lock_seqid))
6905 goto out_free_seqid;
6906 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6907 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6908 p->arg.lock_owner.s_dev = server->s_dev;
6909 p->res.lock_seqid = p->arg.lock_seqid;
6910 p->lsp = lsp;
6911 p->server = server;
6912 p->ctx = get_nfs_open_context(ctx);
6913 locks_init_lock(&p->fl);
6914 locks_copy_lock(&p->fl, fl);
6915 return p;
6916out_free_seqid:
6917 nfs_free_seqid(p->arg.open_seqid);
6918out_free:
6919 kfree(p);
6920 return NULL;
6921}
6922
6923static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6924{
6925 struct nfs4_lockdata *data = calldata;
6926 struct nfs4_state *state = data->lsp->ls_state;
6927
6928 dprintk("%s: begin!\n", __func__);
6929 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6930 goto out_wait;
6931
6932 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6933 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6934 goto out_release_lock_seqid;
6935 }
6936 nfs4_stateid_copy(&data->arg.open_stateid,
6937 &state->open_stateid);
6938 data->arg.new_lock_owner = 1;
6939 data->res.open_seqid = data->arg.open_seqid;
6940 } else {
6941 data->arg.new_lock_owner = 0;
6942 nfs4_stateid_copy(&data->arg.lock_stateid,
6943 &data->lsp->ls_stateid);
6944 }
6945 if (!nfs4_valid_open_stateid(state)) {
6946 data->rpc_status = -EBADF;
6947 task->tk_action = NULL;
6948 goto out_release_open_seqid;
6949 }
6950 data->timestamp = jiffies;
6951 if (nfs4_setup_sequence(data->server->nfs_client,
6952 &data->arg.seq_args,
6953 &data->res.seq_res,
6954 task) == 0)
6955 return;
6956out_release_open_seqid:
6957 nfs_release_seqid(data->arg.open_seqid);
6958out_release_lock_seqid:
6959 nfs_release_seqid(data->arg.lock_seqid);
6960out_wait:
6961 nfs4_sequence_done(task, &data->res.seq_res);
6962 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6963}
6964
6965static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6966{
6967 struct nfs4_lockdata *data = calldata;
6968 struct nfs4_lock_state *lsp = data->lsp;
6969
6970 dprintk("%s: begin!\n", __func__);
6971
6972 if (!nfs4_sequence_done(task, &data->res.seq_res))
6973 return;
6974
6975 data->rpc_status = task->tk_status;
6976 switch (task->tk_status) {
6977 case 0:
6978 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6979 data->timestamp);
6980 if (data->arg.new_lock && !data->cancelled) {
6981 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6982 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6983 goto out_restart;
6984 }
6985 if (data->arg.new_lock_owner != 0) {
6986 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6987 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6988 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6989 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6990 goto out_restart;
6991 break;
6992 case -NFS4ERR_BAD_STATEID:
6993 case -NFS4ERR_OLD_STATEID:
6994 case -NFS4ERR_STALE_STATEID:
6995 case -NFS4ERR_EXPIRED:
6996 if (data->arg.new_lock_owner != 0) {
6997 if (!nfs4_stateid_match(&data->arg.open_stateid,
6998 &lsp->ls_state->open_stateid))
6999 goto out_restart;
7000 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
7001 &lsp->ls_stateid))
7002 goto out_restart;
7003 }
7004out_done:
7005 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
7006 return;
7007out_restart:
7008 if (!data->cancelled)
7009 rpc_restart_call_prepare(task);
7010 goto out_done;
7011}
7012
7013static void nfs4_lock_release(void *calldata)
7014{
7015 struct nfs4_lockdata *data = calldata;
7016
7017 dprintk("%s: begin!\n", __func__);
7018 nfs_free_seqid(data->arg.open_seqid);
7019 if (data->cancelled && data->rpc_status == 0) {
7020 struct rpc_task *task;
7021 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7022 data->arg.lock_seqid);
7023 if (!IS_ERR(task))
7024 rpc_put_task_async(task);
7025 dprintk("%s: cancelling lock!\n", __func__);
7026 } else
7027 nfs_free_seqid(data->arg.lock_seqid);
7028 nfs4_put_lock_state(data->lsp);
7029 put_nfs_open_context(data->ctx);
7030 kfree(data);
7031 dprintk("%s: done!\n", __func__);
7032}
7033
7034static const struct rpc_call_ops nfs4_lock_ops = {
7035 .rpc_call_prepare = nfs4_lock_prepare,
7036 .rpc_call_done = nfs4_lock_done,
7037 .rpc_release = nfs4_lock_release,
7038};
7039
7040static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7041{
7042 switch (error) {
7043 case -NFS4ERR_ADMIN_REVOKED:
7044 case -NFS4ERR_EXPIRED:
7045 case -NFS4ERR_BAD_STATEID:
7046 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
7047 if (new_lock_owner != 0 ||
7048 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
7049 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
7050 break;
7051 case -NFS4ERR_STALE_STATEID:
7052 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
7053 nfs4_schedule_lease_recovery(server->nfs_client);
7054 }
7055}
7056
7057static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
7058{
7059 struct nfs4_lockdata *data;
7060 struct rpc_task *task;
7061 struct rpc_message msg = {
7062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7063 .rpc_cred = state->owner->so_cred,
7064 };
7065 struct rpc_task_setup task_setup_data = {
7066 .rpc_client = NFS_CLIENT(state->inode),
7067 .rpc_message = &msg,
7068 .callback_ops = &nfs4_lock_ops,
7069 .workqueue = nfsiod_workqueue,
7070 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
7071 };
7072 int ret;
7073
7074 dprintk("%s: begin!\n", __func__);
7075 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
7076 fl->fl_u.nfs4_fl.owner,
7077 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
7078 if (data == NULL)
7079 return -ENOMEM;
7080 if (IS_SETLKW(cmd))
7081 data->arg.block = 1;
7082 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7083 recovery_type > NFS_LOCK_NEW);
7084 msg.rpc_argp = &data->arg;
7085 msg.rpc_resp = &data->res;
7086 task_setup_data.callback_data = data;
7087 if (recovery_type > NFS_LOCK_NEW) {
7088 if (recovery_type == NFS_LOCK_RECLAIM)
7089 data->arg.reclaim = NFS_LOCK_RECLAIM;
7090 } else
7091 data->arg.new_lock = 1;
7092 task = rpc_run_task(&task_setup_data);
7093 if (IS_ERR(task))
7094 return PTR_ERR(task);
7095 ret = rpc_wait_for_completion_task(task);
7096 if (ret == 0) {
7097 ret = data->rpc_status;
7098 if (ret)
7099 nfs4_handle_setlk_error(data->server, data->lsp,
7100 data->arg.new_lock_owner, ret);
7101 } else
7102 data->cancelled = true;
7103 rpc_put_task(task);
7104 dprintk("%s: done, ret = %d!\n", __func__, ret);
7105 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
7106 return ret;
7107}
7108
7109static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7110{
7111 struct nfs_server *server = NFS_SERVER(state->inode);
7112 struct nfs4_exception exception = {
7113 .inode = state->inode,
7114 };
7115 int err;
7116
7117 do {
7118
7119 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7120 return 0;
7121 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
7122 if (err != -NFS4ERR_DELAY)
7123 break;
7124 nfs4_handle_exception(server, err, &exception);
7125 } while (exception.retry);
7126 return err;
7127}
7128
7129static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7130{
7131 struct nfs_server *server = NFS_SERVER(state->inode);
7132 struct nfs4_exception exception = {
7133 .inode = state->inode,
7134 };
7135 int err;
7136
7137 err = nfs4_set_lock_state(state, request);
7138 if (err != 0)
7139 return err;
7140 if (!recover_lost_locks) {
7141 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7142 return 0;
7143 }
7144 do {
7145 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7146 return 0;
7147 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
7148 switch (err) {
7149 default:
7150 goto out;
7151 case -NFS4ERR_GRACE:
7152 case -NFS4ERR_DELAY:
7153 nfs4_handle_exception(server, err, &exception);
7154 err = 0;
7155 }
7156 } while (exception.retry);
7157out:
7158 return err;
7159}
7160
7161#if defined(CONFIG_NFS_V4_1)
7162static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7163{
7164 struct nfs4_lock_state *lsp;
7165 int status;
7166
7167 status = nfs4_set_lock_state(state, request);
7168 if (status != 0)
7169 return status;
7170 lsp = request->fl_u.nfs4_fl.owner;
7171 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7172 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7173 return 0;
7174 return nfs4_lock_expired(state, request);
7175}
7176#endif
7177
7178static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7179{
7180 struct nfs_inode *nfsi = NFS_I(state->inode);
7181 struct nfs4_state_owner *sp = state->owner;
7182 unsigned char fl_flags = request->fl_flags;
7183 int status;
7184
7185 request->fl_flags |= FL_ACCESS;
7186 status = locks_lock_inode_wait(state->inode, request);
7187 if (status < 0)
7188 goto out;
7189 mutex_lock(&sp->so_delegreturn_mutex);
7190 down_read(&nfsi->rwsem);
7191 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
7192
7193
7194 request->fl_flags = fl_flags & ~FL_SLEEP;
7195 status = locks_lock_inode_wait(state->inode, request);
7196 up_read(&nfsi->rwsem);
7197 mutex_unlock(&sp->so_delegreturn_mutex);
7198 goto out;
7199 }
7200 up_read(&nfsi->rwsem);
7201 mutex_unlock(&sp->so_delegreturn_mutex);
7202 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
7203out:
7204 request->fl_flags = fl_flags;
7205 return status;
7206}
7207
7208static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7209{
7210 struct nfs4_exception exception = {
7211 .state = state,
7212 .inode = state->inode,
7213 .interruptible = true,
7214 };
7215 int err;
7216
7217 do {
7218 err = _nfs4_proc_setlk(state, cmd, request);
7219 if (err == -NFS4ERR_DENIED)
7220 err = -EAGAIN;
7221 err = nfs4_handle_exception(NFS_SERVER(state->inode),
7222 err, &exception);
7223 } while (exception.retry);
7224 return err;
7225}
7226
7227#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7228#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7229
7230static int
7231nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7232 struct file_lock *request)
7233{
7234 int status = -ERESTARTSYS;
7235 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7236
7237 while(!signalled()) {
7238 status = nfs4_proc_setlk(state, cmd, request);
7239 if ((status != -EAGAIN) || IS_SETLK(cmd))
7240 break;
7241 freezable_schedule_timeout_interruptible(timeout);
7242 timeout *= 2;
7243 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7244 status = -ERESTARTSYS;
7245 }
7246 return status;
7247}
7248
7249#ifdef CONFIG_NFS_V4_1
7250struct nfs4_lock_waiter {
7251 struct task_struct *task;
7252 struct inode *inode;
7253 struct nfs_lowner *owner;
7254};
7255
7256static int
7257nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
7258{
7259 int ret;
7260 struct nfs4_lock_waiter *waiter = wait->private;
7261
7262
7263 if (key) {
7264 struct cb_notify_lock_args *cbnl = key;
7265 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
7266 *wowner = waiter->owner;
7267
7268
7269 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7270 return 0;
7271
7272
7273 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7274 return 0;
7275 }
7276
7277
7278 wait->private = waiter->task;
7279 ret = woken_wake_function(wait, mode, flags, key);
7280 if (ret)
7281 list_del_init(&wait->entry);
7282 wait->private = waiter;
7283 return ret;
7284}
7285
7286static int
7287nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7288{
7289 int status = -ERESTARTSYS;
7290 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7291 struct nfs_server *server = NFS_SERVER(state->inode);
7292 struct nfs_client *clp = server->nfs_client;
7293 wait_queue_head_t *q = &clp->cl_lock_waitq;
7294 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
7295 .id = lsp->ls_seqid.owner_id,
7296 .s_dev = server->s_dev };
7297 struct nfs4_lock_waiter waiter = { .task = current,
7298 .inode = state->inode,
7299 .owner = &owner};
7300 wait_queue_entry_t wait;
7301
7302
7303 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7304 return nfs4_retry_setlk_simple(state, cmd, request);
7305
7306 init_wait(&wait);
7307 wait.private = &waiter;
7308 wait.func = nfs4_wake_lock_waiter;
7309
7310 while(!signalled()) {
7311 add_wait_queue(q, &wait);
7312 status = nfs4_proc_setlk(state, cmd, request);
7313 if ((status != -EAGAIN) || IS_SETLK(cmd)) {
7314 finish_wait(q, &wait);
7315 break;
7316 }
7317
7318 status = -ERESTARTSYS;
7319 freezer_do_not_count();
7320 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
7321 freezer_count();
7322 finish_wait(q, &wait);
7323 }
7324
7325 return status;
7326}
7327#else
7328static inline int
7329nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7330{
7331 return nfs4_retry_setlk_simple(state, cmd, request);
7332}
7333#endif
7334
7335static int
7336nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7337{
7338 struct nfs_open_context *ctx;
7339 struct nfs4_state *state;
7340 int status;
7341
7342
7343 ctx = nfs_file_open_context(filp);
7344 state = ctx->state;
7345
7346 if (IS_GETLK(cmd)) {
7347 if (state != NULL)
7348 return nfs4_proc_getlk(state, F_GETLK, request);
7349 return 0;
7350 }
7351
7352 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7353 return -EINVAL;
7354
7355 if (request->fl_type == F_UNLCK) {
7356 if (state != NULL)
7357 return nfs4_proc_unlck(state, cmd, request);
7358 return 0;
7359 }
7360
7361 if (state == NULL)
7362 return -ENOLCK;
7363
7364 if ((request->fl_flags & FL_POSIX) &&
7365 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7366 return -ENOLCK;
7367
7368
7369
7370
7371
7372 switch (request->fl_type) {
7373 case F_RDLCK:
7374 if (!(filp->f_mode & FMODE_READ))
7375 return -EBADF;
7376 break;
7377 case F_WRLCK:
7378 if (!(filp->f_mode & FMODE_WRITE))
7379 return -EBADF;
7380 }
7381
7382 status = nfs4_set_lock_state(state, request);
7383 if (status != 0)
7384 return status;
7385
7386 return nfs4_retry_setlk(state, cmd, request);
7387}
7388
7389int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
7390{
7391 struct nfs_server *server = NFS_SERVER(state->inode);
7392 int err;
7393
7394 err = nfs4_set_lock_state(state, fl);
7395 if (err != 0)
7396 return err;
7397 do {
7398 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7399 if (err != -NFS4ERR_DELAY)
7400 break;
7401 ssleep(1);
7402 } while (err == -NFS4ERR_DELAY);
7403 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
7404}
7405
7406struct nfs_release_lockowner_data {
7407 struct nfs4_lock_state *lsp;
7408 struct nfs_server *server;
7409 struct nfs_release_lockowner_args args;
7410 struct nfs_release_lockowner_res res;
7411 unsigned long timestamp;
7412};
7413
7414static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7415{
7416 struct nfs_release_lockowner_data *data = calldata;
7417 struct nfs_server *server = data->server;
7418 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7419 &data->res.seq_res, task);
7420 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7421 data->timestamp = jiffies;
7422}
7423
7424static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7425{
7426 struct nfs_release_lockowner_data *data = calldata;
7427 struct nfs_server *server = data->server;
7428
7429 nfs40_sequence_done(task, &data->res.seq_res);
7430
7431 switch (task->tk_status) {
7432 case 0:
7433 renew_lease(server, data->timestamp);
7434 break;
7435 case -NFS4ERR_STALE_CLIENTID:
7436 case -NFS4ERR_EXPIRED:
7437 nfs4_schedule_lease_recovery(server->nfs_client);
7438 break;
7439 case -NFS4ERR_LEASE_MOVED:
7440 case -NFS4ERR_DELAY:
7441 if (nfs4_async_handle_error(task, server,
7442 NULL, NULL) == -EAGAIN)
7443 rpc_restart_call_prepare(task);
7444 }
7445}
7446
7447static void nfs4_release_lockowner_release(void *calldata)
7448{
7449 struct nfs_release_lockowner_data *data = calldata;
7450 nfs4_free_lock_state(data->server, data->lsp);
7451 kfree(calldata);
7452}
7453
7454static const struct rpc_call_ops nfs4_release_lockowner_ops = {
7455 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7456 .rpc_call_done = nfs4_release_lockowner_done,
7457 .rpc_release = nfs4_release_lockowner_release,
7458};
7459
7460static void
7461nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
7462{
7463 struct nfs_release_lockowner_data *data;
7464 struct rpc_message msg = {
7465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7466 };
7467
7468 if (server->nfs_client->cl_mvops->minor_version != 0)
7469 return;
7470
7471 data = kmalloc(sizeof(*data), GFP_NOFS);
7472 if (!data)
7473 return;
7474 data->lsp = lsp;
7475 data->server = server;
7476 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7477 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7478 data->args.lock_owner.s_dev = server->s_dev;
7479
7480 msg.rpc_argp = &data->args;
7481 msg.rpc_resp = &data->res;
7482 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
7483 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
7484}
7485
7486#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7487
7488static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
7489 struct dentry *unused, struct inode *inode,
7490 const char *key, const void *buf,
7491 size_t buflen, int flags)
7492{
7493 return nfs4_proc_set_acl(inode, buf, buflen);
7494}
7495
7496static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
7497 struct dentry *unused, struct inode *inode,
7498 const char *key, void *buf, size_t buflen)
7499{
7500 return nfs4_proc_get_acl(inode, buf, buflen);
7501}
7502
7503static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
7504{
7505 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
7506}
7507
7508#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7509
7510static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
7511 struct dentry *unused, struct inode *inode,
7512 const char *key, const void *buf,
7513 size_t buflen, int flags)
7514{
7515 if (security_ismaclabel(key))
7516 return nfs4_set_security_label(inode, buf, buflen);
7517
7518 return -EOPNOTSUPP;
7519}
7520
7521static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
7522 struct dentry *unused, struct inode *inode,
7523 const char *key, void *buf, size_t buflen)
7524{
7525 if (security_ismaclabel(key))
7526 return nfs4_get_security_label(inode, buf, buflen);
7527 return -EOPNOTSUPP;
7528}
7529
7530static ssize_t
7531nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7532{
7533 int len = 0;
7534
7535 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7536 len = security_inode_listsecurity(inode, list, list_len);
7537 if (len >= 0 && list_len && len > list_len)
7538 return -ERANGE;
7539 }
7540 return len;
7541}
7542
7543static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7544 .prefix = XATTR_SECURITY_PREFIX,
7545 .get = nfs4_xattr_get_nfs4_label,
7546 .set = nfs4_xattr_set_nfs4_label,
7547};
7548
7549#else
7550
7551static ssize_t
7552nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7553{
7554 return 0;
7555}
7556
7557#endif
7558
7559#ifdef CONFIG_NFS_V4_2
7560static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
7561 struct dentry *unused, struct inode *inode,
7562 const char *key, const void *buf,
7563 size_t buflen, int flags)
7564{
7565 struct nfs_access_entry cache;
7566 int ret;
7567
7568 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7569 return -EOPNOTSUPP;
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7581 if (!(cache.mask & NFS_ACCESS_XAWRITE))
7582 return -EACCES;
7583 }
7584
7585 if (buf == NULL) {
7586 ret = nfs42_proc_removexattr(inode, key);
7587 if (!ret)
7588 nfs4_xattr_cache_remove(inode, key);
7589 } else {
7590 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7591 if (!ret)
7592 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7593 }
7594
7595 return ret;
7596}
7597
7598static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7599 struct dentry *unused, struct inode *inode,
7600 const char *key, void *buf, size_t buflen)
7601{
7602 struct nfs_access_entry cache;
7603 ssize_t ret;
7604
7605 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7606 return -EOPNOTSUPP;
7607
7608 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7609 if (!(cache.mask & NFS_ACCESS_XAREAD))
7610 return -EACCES;
7611 }
7612
7613 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode);
7614 if (ret)
7615 return ret;
7616
7617 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7618 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7619 return ret;
7620
7621 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7622
7623 return ret;
7624}
7625
7626static ssize_t
7627nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7628{
7629 u64 cookie;
7630 bool eof;
7631 ssize_t ret, size;
7632 char *buf;
7633 size_t buflen;
7634 struct nfs_access_entry cache;
7635
7636 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7637 return 0;
7638
7639 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7640 if (!(cache.mask & NFS_ACCESS_XALIST))
7641 return 0;
7642 }
7643
7644 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode);
7645 if (ret)
7646 return ret;
7647
7648 ret = nfs4_xattr_cache_list(inode, list, list_len);
7649 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7650 return ret;
7651
7652 cookie = 0;
7653 eof = false;
7654 buflen = list_len ? list_len : XATTR_LIST_MAX;
7655 buf = list_len ? list : NULL;
7656 size = 0;
7657
7658 while (!eof) {
7659 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7660 &cookie, &eof);
7661 if (ret < 0)
7662 return ret;
7663
7664 if (list_len) {
7665 buf += ret;
7666 buflen -= ret;
7667 }
7668 size += ret;
7669 }
7670
7671 if (list_len)
7672 nfs4_xattr_cache_set_list(inode, list, size);
7673
7674 return size;
7675}
7676
7677#else
7678
7679static ssize_t
7680nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7681{
7682 return 0;
7683}
7684#endif
7685
7686
7687
7688
7689static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7690{
7691 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7692 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7693 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
7694 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
7695 return;
7696
7697 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
7698 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
7699 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7700 fattr->nlink = 2;
7701}
7702
7703static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7704 const struct qstr *name,
7705 struct nfs4_fs_locations *fs_locations,
7706 struct page *page)
7707{
7708 struct nfs_server *server = NFS_SERVER(dir);
7709 u32 bitmask[3];
7710 struct nfs4_fs_locations_arg args = {
7711 .dir_fh = NFS_FH(dir),
7712 .name = name,
7713 .page = page,
7714 .bitmask = bitmask,
7715 };
7716 struct nfs4_fs_locations_res res = {
7717 .fs_locations = fs_locations,
7718 };
7719 struct rpc_message msg = {
7720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7721 .rpc_argp = &args,
7722 .rpc_resp = &res,
7723 };
7724 int status;
7725
7726 dprintk("%s: start\n", __func__);
7727
7728 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7729 bitmask[1] = nfs4_fattr_bitmap[1];
7730
7731
7732
7733 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
7734 bitmask[0] &= ~FATTR4_WORD0_FILEID;
7735 else
7736 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
7737
7738 nfs_fattr_init(&fs_locations->fattr);
7739 fs_locations->server = server;
7740 fs_locations->nlocations = 0;
7741 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
7742 dprintk("%s: returned status = %d\n", __func__, status);
7743 return status;
7744}
7745
7746int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7747 const struct qstr *name,
7748 struct nfs4_fs_locations *fs_locations,
7749 struct page *page)
7750{
7751 struct nfs4_exception exception = {
7752 .interruptible = true,
7753 };
7754 int err;
7755 do {
7756 err = _nfs4_proc_fs_locations(client, dir, name,
7757 fs_locations, page);
7758 trace_nfs4_get_fs_locations(dir, name, err);
7759 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7760 &exception);
7761 } while (exception.retry);
7762 return err;
7763}
7764
7765
7766
7767
7768
7769
7770
7771
7772static int _nfs40_proc_get_locations(struct inode *inode,
7773 struct nfs4_fs_locations *locations,
7774 struct page *page, const struct cred *cred)
7775{
7776 struct nfs_server *server = NFS_SERVER(inode);
7777 struct rpc_clnt *clnt = server->client;
7778 u32 bitmask[2] = {
7779 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7780 };
7781 struct nfs4_fs_locations_arg args = {
7782 .clientid = server->nfs_client->cl_clientid,
7783 .fh = NFS_FH(inode),
7784 .page = page,
7785 .bitmask = bitmask,
7786 .migration = 1,
7787 .renew = 1,
7788 };
7789 struct nfs4_fs_locations_res res = {
7790 .fs_locations = locations,
7791 .migration = 1,
7792 .renew = 1,
7793 };
7794 struct rpc_message msg = {
7795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7796 .rpc_argp = &args,
7797 .rpc_resp = &res,
7798 .rpc_cred = cred,
7799 };
7800 unsigned long now = jiffies;
7801 int status;
7802
7803 nfs_fattr_init(&locations->fattr);
7804 locations->server = server;
7805 locations->nlocations = 0;
7806
7807 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7808 status = nfs4_call_sync_sequence(clnt, server, &msg,
7809 &args.seq_args, &res.seq_res);
7810 if (status)
7811 return status;
7812
7813 renew_lease(server, now);
7814 return 0;
7815}
7816
7817#ifdef CONFIG_NFS_V4_1
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829static int _nfs41_proc_get_locations(struct inode *inode,
7830 struct nfs4_fs_locations *locations,
7831 struct page *page, const struct cred *cred)
7832{
7833 struct nfs_server *server = NFS_SERVER(inode);
7834 struct rpc_clnt *clnt = server->client;
7835 u32 bitmask[2] = {
7836 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7837 };
7838 struct nfs4_fs_locations_arg args = {
7839 .fh = NFS_FH(inode),
7840 .page = page,
7841 .bitmask = bitmask,
7842 .migration = 1,
7843 };
7844 struct nfs4_fs_locations_res res = {
7845 .fs_locations = locations,
7846 .migration = 1,
7847 };
7848 struct rpc_message msg = {
7849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7850 .rpc_argp = &args,
7851 .rpc_resp = &res,
7852 .rpc_cred = cred,
7853 };
7854 int status;
7855
7856 nfs_fattr_init(&locations->fattr);
7857 locations->server = server;
7858 locations->nlocations = 0;
7859
7860 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7861 status = nfs4_call_sync_sequence(clnt, server, &msg,
7862 &args.seq_args, &res.seq_res);
7863 if (status == NFS4_OK &&
7864 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7865 status = -NFS4ERR_LEASE_MOVED;
7866 return status;
7867}
7868
7869#endif
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888int nfs4_proc_get_locations(struct inode *inode,
7889 struct nfs4_fs_locations *locations,
7890 struct page *page, const struct cred *cred)
7891{
7892 struct nfs_server *server = NFS_SERVER(inode);
7893 struct nfs_client *clp = server->nfs_client;
7894 const struct nfs4_mig_recovery_ops *ops =
7895 clp->cl_mvops->mig_recovery_ops;
7896 struct nfs4_exception exception = {
7897 .interruptible = true,
7898 };
7899 int status;
7900
7901 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7902 (unsigned long long)server->fsid.major,
7903 (unsigned long long)server->fsid.minor,
7904 clp->cl_hostname);
7905 nfs_display_fhandle(NFS_FH(inode), __func__);
7906
7907 do {
7908 status = ops->get_locations(inode, locations, page, cred);
7909 if (status != -NFS4ERR_DELAY)
7910 break;
7911 nfs4_handle_exception(server, status, &exception);
7912 } while (exception.retry);
7913 return status;
7914}
7915
7916
7917
7918
7919
7920
7921
7922
7923static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
7924{
7925 struct nfs_server *server = NFS_SERVER(inode);
7926 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7927 struct rpc_clnt *clnt = server->client;
7928 struct nfs4_fsid_present_arg args = {
7929 .fh = NFS_FH(inode),
7930 .clientid = clp->cl_clientid,
7931 .renew = 1,
7932 };
7933 struct nfs4_fsid_present_res res = {
7934 .renew = 1,
7935 };
7936 struct rpc_message msg = {
7937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7938 .rpc_argp = &args,
7939 .rpc_resp = &res,
7940 .rpc_cred = cred,
7941 };
7942 unsigned long now = jiffies;
7943 int status;
7944
7945 res.fh = nfs_alloc_fhandle();
7946 if (res.fh == NULL)
7947 return -ENOMEM;
7948
7949 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7950 status = nfs4_call_sync_sequence(clnt, server, &msg,
7951 &args.seq_args, &res.seq_res);
7952 nfs_free_fhandle(res.fh);
7953 if (status)
7954 return status;
7955
7956 do_renew_lease(clp, now);
7957 return 0;
7958}
7959
7960#ifdef CONFIG_NFS_V4_1
7961
7962
7963
7964
7965
7966
7967
7968
7969static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
7970{
7971 struct nfs_server *server = NFS_SERVER(inode);
7972 struct rpc_clnt *clnt = server->client;
7973 struct nfs4_fsid_present_arg args = {
7974 .fh = NFS_FH(inode),
7975 };
7976 struct nfs4_fsid_present_res res = {
7977 };
7978 struct rpc_message msg = {
7979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7980 .rpc_argp = &args,
7981 .rpc_resp = &res,
7982 .rpc_cred = cred,
7983 };
7984 int status;
7985
7986 res.fh = nfs_alloc_fhandle();
7987 if (res.fh == NULL)
7988 return -ENOMEM;
7989
7990 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7991 status = nfs4_call_sync_sequence(clnt, server, &msg,
7992 &args.seq_args, &res.seq_res);
7993 nfs_free_fhandle(res.fh);
7994 if (status == NFS4_OK &&
7995 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7996 status = -NFS4ERR_LEASE_MOVED;
7997 return status;
7998}
7999
8000#endif
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
8017{
8018 struct nfs_server *server = NFS_SERVER(inode);
8019 struct nfs_client *clp = server->nfs_client;
8020 const struct nfs4_mig_recovery_ops *ops =
8021 clp->cl_mvops->mig_recovery_ops;
8022 struct nfs4_exception exception = {
8023 .interruptible = true,
8024 };
8025 int status;
8026
8027 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8028 (unsigned long long)server->fsid.major,
8029 (unsigned long long)server->fsid.minor,
8030 clp->cl_hostname);
8031 nfs_display_fhandle(NFS_FH(inode), __func__);
8032
8033 do {
8034 status = ops->fsid_present(inode, cred);
8035 if (status != -NFS4ERR_DELAY)
8036 break;
8037 nfs4_handle_exception(server, status, &exception);
8038 } while (exception.retry);
8039 return status;
8040}
8041
8042
8043
8044
8045
8046
8047
8048
8049static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8050{
8051 int status;
8052 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8053 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
8054 struct nfs4_secinfo_arg args = {
8055 .dir_fh = NFS_FH(dir),
8056 .name = name,
8057 };
8058 struct nfs4_secinfo_res res = {
8059 .flavors = flavors,
8060 };
8061 struct rpc_message msg = {
8062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8063 .rpc_argp = &args,
8064 .rpc_resp = &res,
8065 };
8066 struct nfs4_call_sync_data data = {
8067 .seq_server = NFS_SERVER(dir),
8068 .seq_args = &args.seq_args,
8069 .seq_res = &res.seq_res,
8070 };
8071 struct rpc_task_setup task_setup = {
8072 .rpc_client = clnt,
8073 .rpc_message = &msg,
8074 .callback_ops = clp->cl_mvops->call_sync_ops,
8075 .callback_data = &data,
8076 .flags = RPC_TASK_NO_ROUND_ROBIN,
8077 };
8078 const struct cred *cred = NULL;
8079
8080 if (use_integrity) {
8081 clnt = clp->cl_rpcclient;
8082 task_setup.rpc_client = clnt;
8083
8084 cred = nfs4_get_clid_cred(clp);
8085 msg.rpc_cred = cred;
8086 }
8087
8088 dprintk("NFS call secinfo %s\n", name->name);
8089
8090 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8091 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8092 status = nfs4_call_sync_custom(&task_setup);
8093
8094 dprintk("NFS reply secinfo: %d\n", status);
8095
8096 put_cred(cred);
8097 return status;
8098}
8099
8100int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8101 struct nfs4_secinfo_flavors *flavors)
8102{
8103 struct nfs4_exception exception = {
8104 .interruptible = true,
8105 };
8106 int err;
8107 do {
8108 err = -NFS4ERR_WRONGSEC;
8109
8110
8111 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8112 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8113
8114
8115
8116
8117
8118
8119
8120 if (err == -NFS4ERR_WRONGSEC)
8121 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8122
8123 trace_nfs4_secinfo(dir, name, err);
8124 err = nfs4_handle_exception(NFS_SERVER(dir), err,
8125 &exception);
8126 } while (exception.retry);
8127 return err;
8128}
8129
8130#ifdef CONFIG_NFS_V4_1
8131
8132
8133
8134
8135
8136static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
8137{
8138 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8139 goto out_inval;
8140 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
8141 goto out_inval;
8142 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8143 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8144 goto out_inval;
8145 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8146 goto out_inval;
8147 return NFS_OK;
8148out_inval:
8149 return -NFS4ERR_INVAL;
8150}
8151
8152static bool
8153nfs41_same_server_scope(struct nfs41_server_scope *a,
8154 struct nfs41_server_scope *b)
8155{
8156 if (a->server_scope_sz != b->server_scope_sz)
8157 return false;
8158 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
8159}
8160
8161static void
8162nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8163{
8164 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
8165 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
8166 struct nfs_client *clp = args->client;
8167
8168 switch (task->tk_status) {
8169 case -NFS4ERR_BADSESSION:
8170 case -NFS4ERR_DEADSESSION:
8171 nfs4_schedule_session_recovery(clp->cl_session,
8172 task->tk_status);
8173 }
8174 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8175 res->dir != NFS4_CDFS4_BOTH) {
8176 rpc_task_close_connection(task);
8177 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8178 rpc_restart_call(task);
8179 }
8180}
8181
8182static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
8183 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
8184};
8185
8186
8187
8188
8189
8190
8191
8192static
8193int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8194 struct rpc_xprt *xprt,
8195 struct nfs_client *clp,
8196 const struct cred *cred)
8197{
8198 int status;
8199 struct nfs41_bind_conn_to_session_args args = {
8200 .client = clp,
8201 .dir = NFS4_CDFC4_FORE_OR_BOTH,
8202 .retries = 0,
8203 };
8204 struct nfs41_bind_conn_to_session_res res;
8205 struct rpc_message msg = {
8206 .rpc_proc =
8207 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
8208 .rpc_argp = &args,
8209 .rpc_resp = &res,
8210 .rpc_cred = cred,
8211 };
8212 struct rpc_task_setup task_setup_data = {
8213 .rpc_client = clnt,
8214 .rpc_xprt = xprt,
8215 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
8216 .rpc_message = &msg,
8217 .flags = RPC_TASK_TIMEOUT,
8218 };
8219 struct rpc_task *task;
8220
8221 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8222 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8223 args.dir = NFS4_CDFC4_FORE;
8224
8225
8226 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8227 args.dir = NFS4_CDFC4_FORE;
8228
8229 task = rpc_run_task(&task_setup_data);
8230 if (!IS_ERR(task)) {
8231 status = task->tk_status;
8232 rpc_put_task(task);
8233 } else
8234 status = PTR_ERR(task);
8235 trace_nfs4_bind_conn_to_session(clp, status);
8236 if (status == 0) {
8237 if (memcmp(res.sessionid.data,
8238 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8239 dprintk("NFS: %s: Session ID mismatch\n", __func__);
8240 return -EIO;
8241 }
8242 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
8243 dprintk("NFS: %s: Unexpected direction from server\n",
8244 __func__);
8245 return -EIO;
8246 }
8247 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
8248 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8249 __func__);
8250 return -EIO;
8251 }
8252 }
8253
8254 return status;
8255}
8256
8257struct rpc_bind_conn_calldata {
8258 struct nfs_client *clp;
8259 const struct cred *cred;
8260};
8261
8262static int
8263nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8264 struct rpc_xprt *xprt,
8265 void *calldata)
8266{
8267 struct rpc_bind_conn_calldata *p = calldata;
8268
8269 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8270}
8271
8272int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
8273{
8274 struct rpc_bind_conn_calldata data = {
8275 .clp = clp,
8276 .cred = cred,
8277 };
8278 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8279 nfs4_proc_bind_conn_to_session_callback, &data);
8280}
8281
8282
8283
8284
8285
8286static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8287 .how = SP4_MACH_CRED,
8288 .enforce.u.words = {
8289 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8290 1 << (OP_EXCHANGE_ID - 32) |
8291 1 << (OP_CREATE_SESSION - 32) |
8292 1 << (OP_DESTROY_SESSION - 32) |
8293 1 << (OP_DESTROY_CLIENTID - 32)
8294 },
8295 .allow.u.words = {
8296 [0] = 1 << (OP_CLOSE) |
8297 1 << (OP_OPEN_DOWNGRADE) |
8298 1 << (OP_LOCKU) |
8299 1 << (OP_DELEGRETURN) |
8300 1 << (OP_COMMIT),
8301 [1] = 1 << (OP_SECINFO - 32) |
8302 1 << (OP_SECINFO_NO_NAME - 32) |
8303 1 << (OP_LAYOUTRETURN - 32) |
8304 1 << (OP_TEST_STATEID - 32) |
8305 1 << (OP_FREE_STATEID - 32) |
8306 1 << (OP_WRITE - 32)
8307 }
8308};
8309
8310
8311
8312
8313
8314
8315
8316static int nfs4_sp4_select_mode(struct nfs_client *clp,
8317 struct nfs41_state_protection *sp)
8318{
8319 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8320 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8321 1 << (OP_EXCHANGE_ID - 32) |
8322 1 << (OP_CREATE_SESSION - 32) |
8323 1 << (OP_DESTROY_SESSION - 32) |
8324 1 << (OP_DESTROY_CLIENTID - 32)
8325 };
8326 unsigned long flags = 0;
8327 unsigned int i;
8328 int ret = 0;
8329
8330 if (sp->how == SP4_MACH_CRED) {
8331
8332 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8333 for (i = 0; i <= LAST_NFS4_OP; i++) {
8334 if (test_bit(i, sp->enforce.u.longs))
8335 dfprintk(MOUNT, " enforce op %d\n", i);
8336 if (test_bit(i, sp->allow.u.longs))
8337 dfprintk(MOUNT, " allow op %d\n", i);
8338 }
8339
8340
8341 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8342 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8343 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8344 ret = -EINVAL;
8345 goto out;
8346 }
8347 }
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8359 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8360 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8361 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8362 dfprintk(MOUNT, "sp4_mach_cred:\n");
8363 dfprintk(MOUNT, " minimal mode enabled\n");
8364 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
8365 } else {
8366 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8367 ret = -EINVAL;
8368 goto out;
8369 }
8370
8371 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
8372 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8373 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
8374 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8375 dfprintk(MOUNT, " cleanup mode enabled\n");
8376 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
8377 }
8378
8379 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8380 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
8381 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
8382 }
8383
8384 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8385 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8386 dfprintk(MOUNT, " secinfo mode enabled\n");
8387 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8388 }
8389
8390 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8391 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8392 dfprintk(MOUNT, " stateid mode enabled\n");
8393 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
8394 }
8395
8396 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8397 dfprintk(MOUNT, " write mode enabled\n");
8398 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8399 }
8400
8401 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8402 dfprintk(MOUNT, " commit mode enabled\n");
8403 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8404 }
8405 }
8406out:
8407 clp->cl_sp4_flags = flags;
8408 return ret;
8409}
8410
8411struct nfs41_exchange_id_data {
8412 struct nfs41_exchange_id_res res;
8413 struct nfs41_exchange_id_args args;
8414};
8415
8416static void nfs4_exchange_id_release(void *data)
8417{
8418 struct nfs41_exchange_id_data *cdata =
8419 (struct nfs41_exchange_id_data *)data;
8420
8421 nfs_put_client(cdata->args.client);
8422 kfree(cdata->res.impl_id);
8423 kfree(cdata->res.server_scope);
8424 kfree(cdata->res.server_owner);
8425 kfree(cdata);
8426}
8427
8428static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8429 .rpc_release = nfs4_exchange_id_release,
8430};
8431
8432
8433
8434
8435
8436
8437static struct rpc_task *
8438nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
8439 u32 sp4_how, struct rpc_xprt *xprt)
8440{
8441 struct rpc_message msg = {
8442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
8443 .rpc_cred = cred,
8444 };
8445 struct rpc_task_setup task_setup_data = {
8446 .rpc_client = clp->cl_rpcclient,
8447 .callback_ops = &nfs4_exchange_id_call_ops,
8448 .rpc_message = &msg,
8449 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8450 };
8451 struct nfs41_exchange_id_data *calldata;
8452 int status;
8453
8454 if (!refcount_inc_not_zero(&clp->cl_count))
8455 return ERR_PTR(-EIO);
8456
8457 status = -ENOMEM;
8458 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8459 if (!calldata)
8460 goto out;
8461
8462 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
8463
8464 status = nfs4_init_uniform_client_string(clp);
8465 if (status)
8466 goto out_calldata;
8467
8468 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8469 GFP_NOFS);
8470 status = -ENOMEM;
8471 if (unlikely(calldata->res.server_owner == NULL))
8472 goto out_calldata;
8473
8474 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
8475 GFP_NOFS);
8476 if (unlikely(calldata->res.server_scope == NULL))
8477 goto out_server_owner;
8478
8479 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8480 if (unlikely(calldata->res.impl_id == NULL))
8481 goto out_server_scope;
8482
8483 switch (sp4_how) {
8484 case SP4_NONE:
8485 calldata->args.state_protect.how = SP4_NONE;
8486 break;
8487
8488 case SP4_MACH_CRED:
8489 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
8490 break;
8491
8492 default:
8493
8494 WARN_ON_ONCE(1);
8495 status = -EINVAL;
8496 goto out_impl_id;
8497 }
8498 if (xprt) {
8499 task_setup_data.rpc_xprt = xprt;
8500 task_setup_data.flags |= RPC_TASK_SOFTCONN;
8501 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8502 sizeof(calldata->args.verifier.data));
8503 }
8504 calldata->args.client = clp;
8505 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
8506 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8507#ifdef CONFIG_NFS_V4_1_MIGRATION
8508 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8509#endif
8510 msg.rpc_argp = &calldata->args;
8511 msg.rpc_resp = &calldata->res;
8512 task_setup_data.callback_data = calldata;
8513
8514 return rpc_run_task(&task_setup_data);
8515
8516out_impl_id:
8517 kfree(calldata->res.impl_id);
8518out_server_scope:
8519 kfree(calldata->res.server_scope);
8520out_server_owner:
8521 kfree(calldata->res.server_owner);
8522out_calldata:
8523 kfree(calldata);
8524out:
8525 nfs_put_client(clp);
8526 return ERR_PTR(status);
8527}
8528
8529
8530
8531
8532
8533
8534static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
8535 u32 sp4_how)
8536{
8537 struct rpc_task *task;
8538 struct nfs41_exchange_id_args *argp;
8539 struct nfs41_exchange_id_res *resp;
8540 unsigned long now = jiffies;
8541 int status;
8542
8543 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8544 if (IS_ERR(task))
8545 return PTR_ERR(task);
8546
8547 argp = task->tk_msg.rpc_argp;
8548 resp = task->tk_msg.rpc_resp;
8549 status = task->tk_status;
8550 if (status != 0)
8551 goto out;
8552
8553 status = nfs4_check_cl_exchange_flags(resp->flags,
8554 clp->cl_mvops->minor_version);
8555 if (status != 0)
8556 goto out;
8557
8558 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8559 if (status != 0)
8560 goto out;
8561
8562 do_renew_lease(clp, now);
8563
8564 clp->cl_clientid = resp->clientid;
8565 clp->cl_exchange_flags = resp->flags;
8566 clp->cl_seqid = resp->seqid;
8567
8568 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8569 clear_bit(NFS4_SESSION_ESTABLISHED,
8570 &clp->cl_session->session_state);
8571
8572 if (clp->cl_serverscope != NULL &&
8573 !nfs41_same_server_scope(clp->cl_serverscope,
8574 resp->server_scope)) {
8575 dprintk("%s: server_scope mismatch detected\n",
8576 __func__);
8577 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8578 }
8579
8580 swap(clp->cl_serverowner, resp->server_owner);
8581 swap(clp->cl_serverscope, resp->server_scope);
8582 swap(clp->cl_implid, resp->impl_id);
8583
8584
8585 memcpy(clp->cl_confirm.data, argp->verifier.data,
8586 sizeof(clp->cl_confirm.data));
8587out:
8588 trace_nfs4_exchange_id(clp, status);
8589 rpc_put_task(task);
8590 return status;
8591}
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
8606{
8607 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8608 int status;
8609
8610
8611 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8612 authflavor == RPC_AUTH_GSS_KRB5P) {
8613 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
8614 if (!status)
8615 return 0;
8616 }
8617
8618
8619 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
8620}
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
8638 void *data)
8639{
8640 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
8641 struct rpc_task *task;
8642 int status;
8643
8644 u32 sp4_how;
8645
8646 dprintk("--> %s try %s\n", __func__,
8647 xprt->address_strings[RPC_DISPLAY_ADDR]);
8648
8649 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8650
8651
8652 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8653 if (IS_ERR(task))
8654 return;
8655
8656 status = task->tk_status;
8657 if (status == 0)
8658 status = nfs4_detect_session_trunking(adata->clp,
8659 task->tk_msg.rpc_resp, xprt);
8660
8661 if (status == 0)
8662 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8663
8664 rpc_put_task(task);
8665}
8666EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
8667
8668static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
8669 const struct cred *cred)
8670{
8671 struct rpc_message msg = {
8672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8673 .rpc_argp = clp,
8674 .rpc_cred = cred,
8675 };
8676 int status;
8677
8678 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8679 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8680 trace_nfs4_destroy_clientid(clp, status);
8681 if (status)
8682 dprintk("NFS: Got error %d from the server %s on "
8683 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8684 return status;
8685}
8686
8687static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
8688 const struct cred *cred)
8689{
8690 unsigned int loop;
8691 int ret;
8692
8693 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8694 ret = _nfs4_proc_destroy_clientid(clp, cred);
8695 switch (ret) {
8696 case -NFS4ERR_DELAY:
8697 case -NFS4ERR_CLIENTID_BUSY:
8698 ssleep(1);
8699 break;
8700 default:
8701 return ret;
8702 }
8703 }
8704 return 0;
8705}
8706
8707int nfs4_destroy_clientid(struct nfs_client *clp)
8708{
8709 const struct cred *cred;
8710 int ret = 0;
8711
8712 if (clp->cl_mvops->minor_version < 1)
8713 goto out;
8714 if (clp->cl_exchange_flags == 0)
8715 goto out;
8716 if (clp->cl_preserve_clid)
8717 goto out;
8718 cred = nfs4_get_clid_cred(clp);
8719 ret = nfs4_proc_destroy_clientid(clp, cred);
8720 put_cred(cred);
8721 switch (ret) {
8722 case 0:
8723 case -NFS4ERR_STALE_CLIENTID:
8724 clp->cl_exchange_flags = 0;
8725 }
8726out:
8727 return ret;
8728}
8729
8730#endif
8731
8732struct nfs4_get_lease_time_data {
8733 struct nfs4_get_lease_time_args *args;
8734 struct nfs4_get_lease_time_res *res;
8735 struct nfs_client *clp;
8736};
8737
8738static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8739 void *calldata)
8740{
8741 struct nfs4_get_lease_time_data *data =
8742 (struct nfs4_get_lease_time_data *)calldata;
8743
8744 dprintk("--> %s\n", __func__);
8745
8746
8747 nfs4_setup_sequence(data->clp,
8748 &data->args->la_seq_args,
8749 &data->res->lr_seq_res,
8750 task);
8751 dprintk("<-- %s\n", __func__);
8752}
8753
8754
8755
8756
8757
8758static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8759{
8760 struct nfs4_get_lease_time_data *data =
8761 (struct nfs4_get_lease_time_data *)calldata;
8762
8763 dprintk("--> %s\n", __func__);
8764 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
8765 return;
8766 switch (task->tk_status) {
8767 case -NFS4ERR_DELAY:
8768 case -NFS4ERR_GRACE:
8769 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8770 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8771 task->tk_status = 0;
8772 fallthrough;
8773 case -NFS4ERR_RETRY_UNCACHED_REP:
8774 rpc_restart_call_prepare(task);
8775 return;
8776 }
8777 dprintk("<-- %s\n", __func__);
8778}
8779
8780static const struct rpc_call_ops nfs4_get_lease_time_ops = {
8781 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8782 .rpc_call_done = nfs4_get_lease_time_done,
8783};
8784
8785int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8786{
8787 struct nfs4_get_lease_time_args args;
8788 struct nfs4_get_lease_time_res res = {
8789 .lr_fsinfo = fsinfo,
8790 };
8791 struct nfs4_get_lease_time_data data = {
8792 .args = &args,
8793 .res = &res,
8794 .clp = clp,
8795 };
8796 struct rpc_message msg = {
8797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8798 .rpc_argp = &args,
8799 .rpc_resp = &res,
8800 };
8801 struct rpc_task_setup task_setup = {
8802 .rpc_client = clp->cl_rpcclient,
8803 .rpc_message = &msg,
8804 .callback_ops = &nfs4_get_lease_time_ops,
8805 .callback_data = &data,
8806 .flags = RPC_TASK_TIMEOUT,
8807 };
8808
8809 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
8810 return nfs4_call_sync_custom(&task_setup);
8811}
8812
8813#ifdef CONFIG_NFS_V4_1
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8825 struct rpc_clnt *clnt)
8826{
8827 unsigned int max_rqst_sz, max_resp_sz;
8828 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
8829 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
8830
8831 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8832 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
8833
8834
8835 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8836 args->fc_attrs.max_resp_sz = max_resp_sz;
8837 args->fc_attrs.max_ops = NFS4_MAX_OPS;
8838 args->fc_attrs.max_reqs = max_session_slots;
8839
8840 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8841 "max_ops=%u max_reqs=%u\n",
8842 __func__,
8843 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8844 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
8845
8846
8847 args->bc_attrs.max_rqst_sz = max_bc_payload;
8848 args->bc_attrs.max_resp_sz = max_bc_payload;
8849 args->bc_attrs.max_resp_sz_cached = 0;
8850 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
8851 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
8852 if (args->bc_attrs.max_reqs > max_bc_slots)
8853 args->bc_attrs.max_reqs = max_bc_slots;
8854
8855 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8856 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8857 __func__,
8858 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8859 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8860 args->bc_attrs.max_reqs);
8861}
8862
8863static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8864 struct nfs41_create_session_res *res)
8865{
8866 struct nfs4_channel_attrs *sent = &args->fc_attrs;
8867 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
8868
8869 if (rcvd->max_resp_sz > sent->max_resp_sz)
8870 return -EINVAL;
8871
8872
8873
8874
8875
8876
8877 if (rcvd->max_ops < sent->max_ops)
8878 return -EINVAL;
8879 if (rcvd->max_reqs == 0)
8880 return -EINVAL;
8881 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8882 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
8883 return 0;
8884}
8885
8886static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8887 struct nfs41_create_session_res *res)
8888{
8889 struct nfs4_channel_attrs *sent = &args->bc_attrs;
8890 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8891
8892 if (!(res->flags & SESSION4_BACK_CHAN))
8893 goto out;
8894 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8895 return -EINVAL;
8896 if (rcvd->max_resp_sz < sent->max_resp_sz)
8897 return -EINVAL;
8898 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8899 return -EINVAL;
8900 if (rcvd->max_ops > sent->max_ops)
8901 return -EINVAL;
8902 if (rcvd->max_reqs > sent->max_reqs)
8903 return -EINVAL;
8904out:
8905 return 0;
8906}
8907
8908static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8909 struct nfs41_create_session_res *res)
8910{
8911 int ret;
8912
8913 ret = nfs4_verify_fore_channel_attrs(args, res);
8914 if (ret)
8915 return ret;
8916 return nfs4_verify_back_channel_attrs(args, res);
8917}
8918
8919static void nfs4_update_session(struct nfs4_session *session,
8920 struct nfs41_create_session_res *res)
8921{
8922 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8923
8924 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8925 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8926 session->flags = res->flags;
8927 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8928 if (res->flags & SESSION4_BACK_CHAN)
8929 memcpy(&session->bc_attrs, &res->bc_attrs,
8930 sizeof(session->bc_attrs));
8931}
8932
8933static int _nfs4_proc_create_session(struct nfs_client *clp,
8934 const struct cred *cred)
8935{
8936 struct nfs4_session *session = clp->cl_session;
8937 struct nfs41_create_session_args args = {
8938 .client = clp,
8939 .clientid = clp->cl_clientid,
8940 .seqid = clp->cl_seqid,
8941 .cb_program = NFS4_CALLBACK,
8942 };
8943 struct nfs41_create_session_res res;
8944
8945 struct rpc_message msg = {
8946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8947 .rpc_argp = &args,
8948 .rpc_resp = &res,
8949 .rpc_cred = cred,
8950 };
8951 int status;
8952
8953 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8954 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8955
8956 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8957 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8958 trace_nfs4_create_session(clp, status);
8959
8960 switch (status) {
8961 case -NFS4ERR_STALE_CLIENTID:
8962 case -NFS4ERR_DELAY:
8963 case -ETIMEDOUT:
8964 case -EACCES:
8965 case -EAGAIN:
8966 goto out;
8967 }
8968
8969 clp->cl_seqid++;
8970 if (!status) {
8971
8972 status = nfs4_verify_channel_attrs(&args, &res);
8973
8974 if (status)
8975 goto out;
8976 nfs4_update_session(session, &res);
8977 }
8978out:
8979 return status;
8980}
8981
8982
8983
8984
8985
8986
8987int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
8988{
8989 int status;
8990 unsigned *ptr;
8991 struct nfs4_session *session = clp->cl_session;
8992
8993 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8994
8995 status = _nfs4_proc_create_session(clp, cred);
8996 if (status)
8997 goto out;
8998
8999
9000 status = nfs4_setup_session_slot_tables(session);
9001 dprintk("slot table setup returned %d\n", status);
9002 if (status)
9003 goto out;
9004
9005 ptr = (unsigned *)&session->sess_id.data[0];
9006 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9007 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
9008out:
9009 dprintk("<-- %s\n", __func__);
9010 return status;
9011}
9012
9013
9014
9015
9016
9017int nfs4_proc_destroy_session(struct nfs4_session *session,
9018 const struct cred *cred)
9019{
9020 struct rpc_message msg = {
9021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9022 .rpc_argp = session,
9023 .rpc_cred = cred,
9024 };
9025 int status = 0;
9026
9027 dprintk("--> nfs4_proc_destroy_session\n");
9028
9029
9030 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9031 return 0;
9032
9033 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9034 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
9035 trace_nfs4_destroy_session(session->clp, status);
9036
9037 if (status)
9038 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
9039 "Session has been destroyed regardless...\n", status);
9040
9041 dprintk("<-- nfs4_proc_destroy_session\n");
9042 return status;
9043}
9044
9045
9046
9047
9048struct nfs4_sequence_data {
9049 struct nfs_client *clp;
9050 struct nfs4_sequence_args args;
9051 struct nfs4_sequence_res res;
9052};
9053
9054static void nfs41_sequence_release(void *data)
9055{
9056 struct nfs4_sequence_data *calldata = data;
9057 struct nfs_client *clp = calldata->clp;
9058
9059 if (refcount_read(&clp->cl_count) > 1)
9060 nfs4_schedule_state_renewal(clp);
9061 nfs_put_client(clp);
9062 kfree(calldata);
9063}
9064
9065static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9066{
9067 switch(task->tk_status) {
9068 case -NFS4ERR_DELAY:
9069 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9070 return -EAGAIN;
9071 default:
9072 nfs4_schedule_lease_recovery(clp);
9073 }
9074 return 0;
9075}
9076
9077static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
9078{
9079 struct nfs4_sequence_data *calldata = data;
9080 struct nfs_client *clp = calldata->clp;
9081
9082 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9083 return;
9084
9085 trace_nfs4_sequence(clp, task->tk_status);
9086 if (task->tk_status < 0) {
9087 dprintk("%s ERROR %d\n", __func__, task->tk_status);
9088 if (refcount_read(&clp->cl_count) == 1)
9089 goto out;
9090
9091 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9092 rpc_restart_call_prepare(task);
9093 return;
9094 }
9095 }
9096 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
9097out:
9098 dprintk("<-- %s\n", __func__);
9099}
9100
9101static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9102{
9103 struct nfs4_sequence_data *calldata = data;
9104 struct nfs_client *clp = calldata->clp;
9105 struct nfs4_sequence_args *args;
9106 struct nfs4_sequence_res *res;
9107
9108 args = task->tk_msg.rpc_argp;
9109 res = task->tk_msg.rpc_resp;
9110
9111 nfs4_setup_sequence(clp, args, res, task);
9112}
9113
9114static const struct rpc_call_ops nfs41_sequence_ops = {
9115 .rpc_call_done = nfs41_sequence_call_done,
9116 .rpc_call_prepare = nfs41_sequence_prepare,
9117 .rpc_release = nfs41_sequence_release,
9118};
9119
9120static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
9121 const struct cred *cred,
9122 struct nfs4_slot *slot,
9123 bool is_privileged)
9124{
9125 struct nfs4_sequence_data *calldata;
9126 struct rpc_message msg = {
9127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9128 .rpc_cred = cred,
9129 };
9130 struct rpc_task_setup task_setup_data = {
9131 .rpc_client = clp->cl_rpcclient,
9132 .rpc_message = &msg,
9133 .callback_ops = &nfs41_sequence_ops,
9134 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
9135 };
9136 struct rpc_task *ret;
9137
9138 ret = ERR_PTR(-EIO);
9139 if (!refcount_inc_not_zero(&clp->cl_count))
9140 goto out_err;
9141
9142 ret = ERR_PTR(-ENOMEM);
9143 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9144 if (calldata == NULL)
9145 goto out_put_clp;
9146 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
9147 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
9148 msg.rpc_argp = &calldata->args;
9149 msg.rpc_resp = &calldata->res;
9150 calldata->clp = clp;
9151 task_setup_data.callback_data = calldata;
9152
9153 ret = rpc_run_task(&task_setup_data);
9154 if (IS_ERR(ret))
9155 goto out_err;
9156 return ret;
9157out_put_clp:
9158 nfs_put_client(clp);
9159out_err:
9160 nfs41_release_slot(slot);
9161 return ret;
9162}
9163
9164static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
9165{
9166 struct rpc_task *task;
9167 int ret = 0;
9168
9169 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
9170 return -EAGAIN;
9171 task = _nfs41_proc_sequence(clp, cred, NULL, false);
9172 if (IS_ERR(task))
9173 ret = PTR_ERR(task);
9174 else
9175 rpc_put_task_async(task);
9176 dprintk("<-- %s status=%d\n", __func__, ret);
9177 return ret;
9178}
9179
9180static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
9181{
9182 struct rpc_task *task;
9183 int ret;
9184
9185 task = _nfs41_proc_sequence(clp, cred, NULL, true);
9186 if (IS_ERR(task)) {
9187 ret = PTR_ERR(task);
9188 goto out;
9189 }
9190 ret = rpc_wait_for_completion_task(task);
9191 if (!ret)
9192 ret = task->tk_status;
9193 rpc_put_task(task);
9194out:
9195 dprintk("<-- %s status=%d\n", __func__, ret);
9196 return ret;
9197}
9198
9199struct nfs4_reclaim_complete_data {
9200 struct nfs_client *clp;
9201 struct nfs41_reclaim_complete_args arg;
9202 struct nfs41_reclaim_complete_res res;
9203};
9204
9205static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9206{
9207 struct nfs4_reclaim_complete_data *calldata = data;
9208
9209 nfs4_setup_sequence(calldata->clp,
9210 &calldata->arg.seq_args,
9211 &calldata->res.seq_res,
9212 task);
9213}
9214
9215static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9216{
9217 switch(task->tk_status) {
9218 case 0:
9219 wake_up_all(&clp->cl_lock_waitq);
9220 fallthrough;
9221 case -NFS4ERR_COMPLETE_ALREADY:
9222 case -NFS4ERR_WRONG_CRED:
9223 break;
9224 case -NFS4ERR_DELAY:
9225 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9226 fallthrough;
9227 case -NFS4ERR_RETRY_UNCACHED_REP:
9228 return -EAGAIN;
9229 case -NFS4ERR_BADSESSION:
9230 case -NFS4ERR_DEADSESSION:
9231 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9232 break;
9233 default:
9234 nfs4_schedule_lease_recovery(clp);
9235 }
9236 return 0;
9237}
9238
9239static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9240{
9241 struct nfs4_reclaim_complete_data *calldata = data;
9242 struct nfs_client *clp = calldata->clp;
9243 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9244
9245 dprintk("--> %s\n", __func__);
9246 if (!nfs41_sequence_done(task, res))
9247 return;
9248
9249 trace_nfs4_reclaim_complete(clp, task->tk_status);
9250 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9251 rpc_restart_call_prepare(task);
9252 return;
9253 }
9254 dprintk("<-- %s\n", __func__);
9255}
9256
9257static void nfs4_free_reclaim_complete_data(void *data)
9258{
9259 struct nfs4_reclaim_complete_data *calldata = data;
9260
9261 kfree(calldata);
9262}
9263
9264static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9265 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9266 .rpc_call_done = nfs4_reclaim_complete_done,
9267 .rpc_release = nfs4_free_reclaim_complete_data,
9268};
9269
9270
9271
9272
9273static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
9274 const struct cred *cred)
9275{
9276 struct nfs4_reclaim_complete_data *calldata;
9277 struct rpc_message msg = {
9278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
9279 .rpc_cred = cred,
9280 };
9281 struct rpc_task_setup task_setup_data = {
9282 .rpc_client = clp->cl_rpcclient,
9283 .rpc_message = &msg,
9284 .callback_ops = &nfs4_reclaim_complete_call_ops,
9285 .flags = RPC_TASK_NO_ROUND_ROBIN,
9286 };
9287 int status = -ENOMEM;
9288
9289 dprintk("--> %s\n", __func__);
9290 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9291 if (calldata == NULL)
9292 goto out;
9293 calldata->clp = clp;
9294 calldata->arg.one_fs = 0;
9295
9296 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
9297 msg.rpc_argp = &calldata->arg;
9298 msg.rpc_resp = &calldata->res;
9299 task_setup_data.callback_data = calldata;
9300 status = nfs4_call_sync_custom(&task_setup_data);
9301out:
9302 dprintk("<-- %s status=%d\n", __func__, status);
9303 return status;
9304}
9305
9306static void
9307nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9308{
9309 struct nfs4_layoutget *lgp = calldata;
9310 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
9311
9312 dprintk("--> %s\n", __func__);
9313 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
9314 &lgp->res.seq_res, task);
9315 dprintk("<-- %s\n", __func__);
9316}
9317
9318static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9319{
9320 struct nfs4_layoutget *lgp = calldata;
9321
9322 dprintk("--> %s\n", __func__);
9323 nfs41_sequence_process(task, &lgp->res.seq_res);
9324 dprintk("<-- %s\n", __func__);
9325}
9326
9327static int
9328nfs4_layoutget_handle_exception(struct rpc_task *task,
9329 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9330{
9331 struct inode *inode = lgp->args.inode;
9332 struct nfs_server *server = NFS_SERVER(inode);
9333 struct pnfs_layout_hdr *lo;
9334 int nfs4err = task->tk_status;
9335 int err, status = 0;
9336 LIST_HEAD(head);
9337
9338 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
9339
9340 nfs4_sequence_free_slot(&lgp->res.seq_res);
9341
9342 switch (nfs4err) {
9343 case 0:
9344 goto out;
9345
9346
9347
9348
9349
9350
9351 case -NFS4ERR_LAYOUTUNAVAILABLE:
9352 status = -ENODATA;
9353 goto out;
9354
9355
9356
9357
9358 case -NFS4ERR_BADLAYOUT:
9359 status = -EOVERFLOW;
9360 goto out;
9361
9362
9363
9364
9365
9366
9367
9368
9369 case -NFS4ERR_LAYOUTTRYLATER:
9370 if (lgp->args.minlength == 0) {
9371 status = -EOVERFLOW;
9372 goto out;
9373 }
9374 status = -EBUSY;
9375 break;
9376 case -NFS4ERR_RECALLCONFLICT:
9377 status = -ERECALLCONFLICT;
9378 break;
9379 case -NFS4ERR_DELEG_REVOKED:
9380 case -NFS4ERR_ADMIN_REVOKED:
9381 case -NFS4ERR_EXPIRED:
9382 case -NFS4ERR_BAD_STATEID:
9383 exception->timeout = 0;
9384 spin_lock(&inode->i_lock);
9385 lo = NFS_I(inode)->layout;
9386
9387 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
9388 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
9389 spin_unlock(&inode->i_lock);
9390 exception->state = lgp->args.ctx->state;
9391 exception->stateid = &lgp->args.stateid;
9392 break;
9393 }
9394
9395
9396
9397
9398 pnfs_mark_layout_stateid_invalid(lo, &head);
9399 spin_unlock(&inode->i_lock);
9400 nfs_commit_inode(inode, 0);
9401 pnfs_free_lseg_list(&head);
9402 status = -EAGAIN;
9403 goto out;
9404 }
9405
9406 err = nfs4_handle_exception(server, nfs4err, exception);
9407 if (!status) {
9408 if (exception->retry)
9409 status = -EAGAIN;
9410 else
9411 status = err;
9412 }
9413out:
9414 dprintk("<-- %s\n", __func__);
9415 return status;
9416}
9417
9418size_t max_response_pages(struct nfs_server *server)
9419{
9420 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9421 return nfs_page_array_len(0, max_resp_sz);
9422}
9423
9424static void nfs4_layoutget_release(void *calldata)
9425{
9426 struct nfs4_layoutget *lgp = calldata;
9427
9428 dprintk("--> %s\n", __func__);
9429 nfs4_sequence_free_slot(&lgp->res.seq_res);
9430 pnfs_layoutget_free(lgp);
9431 dprintk("<-- %s\n", __func__);
9432}
9433
9434static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9435 .rpc_call_prepare = nfs4_layoutget_prepare,
9436 .rpc_call_done = nfs4_layoutget_done,
9437 .rpc_release = nfs4_layoutget_release,
9438};
9439
9440struct pnfs_layout_segment *
9441nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
9442{
9443 struct inode *inode = lgp->args.inode;
9444 struct nfs_server *server = NFS_SERVER(inode);
9445 struct rpc_task *task;
9446 struct rpc_message msg = {
9447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9448 .rpc_argp = &lgp->args,
9449 .rpc_resp = &lgp->res,
9450 .rpc_cred = lgp->cred,
9451 };
9452 struct rpc_task_setup task_setup_data = {
9453 .rpc_client = server->client,
9454 .rpc_message = &msg,
9455 .callback_ops = &nfs4_layoutget_call_ops,
9456 .callback_data = lgp,
9457 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
9458 };
9459 struct pnfs_layout_segment *lseg = NULL;
9460 struct nfs4_exception exception = {
9461 .inode = inode,
9462 .timeout = *timeout,
9463 };
9464 int status = 0;
9465
9466 dprintk("--> %s\n", __func__);
9467
9468
9469 pnfs_get_layout_hdr(NFS_I(inode)->layout);
9470
9471 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
9472
9473 task = rpc_run_task(&task_setup_data);
9474
9475 status = rpc_wait_for_completion_task(task);
9476 if (status != 0)
9477 goto out;
9478
9479 if (task->tk_status < 0) {
9480 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9481 *timeout = exception.timeout;
9482 } else if (lgp->res.layoutp->len == 0) {
9483 status = -EAGAIN;
9484 *timeout = nfs4_update_delay(&exception.timeout);
9485 } else
9486 lseg = pnfs_layout_process(lgp);
9487out:
9488 trace_nfs4_layoutget(lgp->args.ctx,
9489 &lgp->args.range,
9490 &lgp->res.range,
9491 &lgp->res.stateid,
9492 status);
9493
9494 rpc_put_task(task);
9495 dprintk("<-- %s status=%d\n", __func__, status);
9496 if (status)
9497 return ERR_PTR(status);
9498 return lseg;
9499}
9500
9501static void
9502nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9503{
9504 struct nfs4_layoutreturn *lrp = calldata;
9505
9506 dprintk("--> %s\n", __func__);
9507 nfs4_setup_sequence(lrp->clp,
9508 &lrp->args.seq_args,
9509 &lrp->res.seq_res,
9510 task);
9511 if (!pnfs_layout_is_valid(lrp->args.layout))
9512 rpc_exit(task, 0);
9513}
9514
9515static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9516{
9517 struct nfs4_layoutreturn *lrp = calldata;
9518 struct nfs_server *server;
9519
9520 dprintk("--> %s\n", __func__);
9521
9522 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
9523 return;
9524
9525
9526
9527
9528
9529 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9530 lrp->res.lrs_present = 0;
9531 return;
9532 }
9533
9534 server = NFS_SERVER(lrp->args.inode);
9535 switch (task->tk_status) {
9536 case -NFS4ERR_OLD_STATEID:
9537 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
9538 &lrp->args.range,
9539 lrp->args.inode))
9540 goto out_restart;
9541 fallthrough;
9542 default:
9543 task->tk_status = 0;
9544 fallthrough;
9545 case 0:
9546 break;
9547 case -NFS4ERR_DELAY:
9548 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
9549 break;
9550 goto out_restart;
9551 }
9552 dprintk("<-- %s\n", __func__);
9553 return;
9554out_restart:
9555 task->tk_status = 0;
9556 nfs4_sequence_free_slot(&lrp->res.seq_res);
9557 rpc_restart_call_prepare(task);
9558}
9559
9560static void nfs4_layoutreturn_release(void *calldata)
9561{
9562 struct nfs4_layoutreturn *lrp = calldata;
9563 struct pnfs_layout_hdr *lo = lrp->args.layout;
9564
9565 dprintk("--> %s\n", __func__);
9566 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
9567 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
9568 nfs4_sequence_free_slot(&lrp->res.seq_res);
9569 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9570 lrp->ld_private.ops->free(&lrp->ld_private);
9571 pnfs_put_layout_hdr(lrp->args.layout);
9572 nfs_iput_and_deactive(lrp->inode);
9573 put_cred(lrp->cred);
9574 kfree(calldata);
9575 dprintk("<-- %s\n", __func__);
9576}
9577
9578static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9579 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9580 .rpc_call_done = nfs4_layoutreturn_done,
9581 .rpc_release = nfs4_layoutreturn_release,
9582};
9583
9584int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
9585{
9586 struct rpc_task *task;
9587 struct rpc_message msg = {
9588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9589 .rpc_argp = &lrp->args,
9590 .rpc_resp = &lrp->res,
9591 .rpc_cred = lrp->cred,
9592 };
9593 struct rpc_task_setup task_setup_data = {
9594 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
9595 .rpc_message = &msg,
9596 .callback_ops = &nfs4_layoutreturn_call_ops,
9597 .callback_data = lrp,
9598 };
9599 int status = 0;
9600
9601 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9602 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9603 &task_setup_data.rpc_client, &msg);
9604
9605 dprintk("--> %s\n", __func__);
9606 if (!sync) {
9607 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9608 if (!lrp->inode) {
9609 nfs4_layoutreturn_release(lrp);
9610 return -EAGAIN;
9611 }
9612 task_setup_data.flags |= RPC_TASK_ASYNC;
9613 }
9614 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
9615 task = rpc_run_task(&task_setup_data);
9616 if (IS_ERR(task))
9617 return PTR_ERR(task);
9618 if (sync)
9619 status = task->tk_status;
9620 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
9621 dprintk("<-- %s status=%d\n", __func__, status);
9622 rpc_put_task(task);
9623 return status;
9624}
9625
9626static int
9627_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9628 struct pnfs_device *pdev,
9629 const struct cred *cred)
9630{
9631 struct nfs4_getdeviceinfo_args args = {
9632 .pdev = pdev,
9633 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9634 NOTIFY_DEVICEID4_DELETE,
9635 };
9636 struct nfs4_getdeviceinfo_res res = {
9637 .pdev = pdev,
9638 };
9639 struct rpc_message msg = {
9640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9641 .rpc_argp = &args,
9642 .rpc_resp = &res,
9643 .rpc_cred = cred,
9644 };
9645 int status;
9646
9647 dprintk("--> %s\n", __func__);
9648 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
9649 if (res.notification & ~args.notify_types)
9650 dprintk("%s: unsupported notification\n", __func__);
9651 if (res.notification != args.notify_types)
9652 pdev->nocache = 1;
9653
9654 dprintk("<-- %s status=%d\n", __func__, status);
9655
9656 return status;
9657}
9658
9659int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9660 struct pnfs_device *pdev,
9661 const struct cred *cred)
9662{
9663 struct nfs4_exception exception = { };
9664 int err;
9665
9666 do {
9667 err = nfs4_handle_exception(server,
9668 _nfs4_proc_getdeviceinfo(server, pdev, cred),
9669 &exception);
9670 } while (exception.retry);
9671 return err;
9672}
9673EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9674
9675static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9676{
9677 struct nfs4_layoutcommit_data *data = calldata;
9678 struct nfs_server *server = NFS_SERVER(data->args.inode);
9679
9680 nfs4_setup_sequence(server->nfs_client,
9681 &data->args.seq_args,
9682 &data->res.seq_res,
9683 task);
9684}
9685
9686static void
9687nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9688{
9689 struct nfs4_layoutcommit_data *data = calldata;
9690 struct nfs_server *server = NFS_SERVER(data->args.inode);
9691
9692 if (!nfs41_sequence_done(task, &data->res.seq_res))
9693 return;
9694
9695 switch (task->tk_status) {
9696 case -NFS4ERR_DELEG_REVOKED:
9697 case -NFS4ERR_BADIOMODE:
9698 case -NFS4ERR_BADLAYOUT:
9699 case -NFS4ERR_GRACE:
9700 task->tk_status = 0;
9701 case 0:
9702 break;
9703 default:
9704 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
9705 rpc_restart_call_prepare(task);
9706 return;
9707 }
9708 }
9709}
9710
9711static void nfs4_layoutcommit_release(void *calldata)
9712{
9713 struct nfs4_layoutcommit_data *data = calldata;
9714
9715 pnfs_cleanup_layoutcommit(data);
9716 nfs_post_op_update_inode_force_wcc(data->args.inode,
9717 data->res.fattr);
9718 put_cred(data->cred);
9719 nfs_iput_and_deactive(data->inode);
9720 kfree(data);
9721}
9722
9723static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9724 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9725 .rpc_call_done = nfs4_layoutcommit_done,
9726 .rpc_release = nfs4_layoutcommit_release,
9727};
9728
9729int
9730nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
9731{
9732 struct rpc_message msg = {
9733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9734 .rpc_argp = &data->args,
9735 .rpc_resp = &data->res,
9736 .rpc_cred = data->cred,
9737 };
9738 struct rpc_task_setup task_setup_data = {
9739 .task = &data->task,
9740 .rpc_client = NFS_CLIENT(data->args.inode),
9741 .rpc_message = &msg,
9742 .callback_ops = &nfs4_layoutcommit_ops,
9743 .callback_data = data,
9744 };
9745 struct rpc_task *task;
9746 int status = 0;
9747
9748 dprintk("NFS: initiating layoutcommit call. sync %d "
9749 "lbw: %llu inode %lu\n", sync,
9750 data->args.lastbytewritten,
9751 data->args.inode->i_ino);
9752
9753 if (!sync) {
9754 data->inode = nfs_igrab_and_active(data->args.inode);
9755 if (data->inode == NULL) {
9756 nfs4_layoutcommit_release(data);
9757 return -EAGAIN;
9758 }
9759 task_setup_data.flags = RPC_TASK_ASYNC;
9760 }
9761 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
9762 task = rpc_run_task(&task_setup_data);
9763 if (IS_ERR(task))
9764 return PTR_ERR(task);
9765 if (sync)
9766 status = task->tk_status;
9767 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
9768 dprintk("%s: status %d\n", __func__, status);
9769 rpc_put_task(task);
9770 return status;
9771}
9772
9773
9774
9775
9776
9777static int
9778_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9779 struct nfs_fsinfo *info,
9780 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
9781{
9782 struct nfs41_secinfo_no_name_args args = {
9783 .style = SECINFO_STYLE_CURRENT_FH,
9784 };
9785 struct nfs4_secinfo_res res = {
9786 .flavors = flavors,
9787 };
9788 struct rpc_message msg = {
9789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9790 .rpc_argp = &args,
9791 .rpc_resp = &res,
9792 };
9793 struct nfs4_call_sync_data data = {
9794 .seq_server = server,
9795 .seq_args = &args.seq_args,
9796 .seq_res = &res.seq_res,
9797 };
9798 struct rpc_task_setup task_setup = {
9799 .rpc_client = server->client,
9800 .rpc_message = &msg,
9801 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9802 .callback_data = &data,
9803 .flags = RPC_TASK_NO_ROUND_ROBIN,
9804 };
9805 const struct cred *cred = NULL;
9806 int status;
9807
9808 if (use_integrity) {
9809 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
9810
9811 cred = nfs4_get_clid_cred(server->nfs_client);
9812 msg.rpc_cred = cred;
9813 }
9814
9815 dprintk("--> %s\n", __func__);
9816 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
9817 status = nfs4_call_sync_custom(&task_setup);
9818 dprintk("<-- %s status=%d\n", __func__, status);
9819
9820 put_cred(cred);
9821
9822 return status;
9823}
9824
9825static int
9826nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9827 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9828{
9829 struct nfs4_exception exception = {
9830 .interruptible = true,
9831 };
9832 int err;
9833 do {
9834
9835 err = -NFS4ERR_WRONGSEC;
9836
9837
9838 if (_nfs4_is_integrity_protected(server->nfs_client))
9839 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9840 flavors, true);
9841
9842
9843
9844
9845
9846
9847
9848 if (err == -NFS4ERR_WRONGSEC)
9849 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9850 flavors, false);
9851
9852 switch (err) {
9853 case 0:
9854 case -NFS4ERR_WRONGSEC:
9855 case -ENOTSUPP:
9856 goto out;
9857 default:
9858 err = nfs4_handle_exception(server, err, &exception);
9859 }
9860 } while (exception.retry);
9861out:
9862 return err;
9863}
9864
9865static int
9866nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9867 struct nfs_fsinfo *info)
9868{
9869 int err;
9870 struct page *page;
9871 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
9872 struct nfs4_secinfo_flavors *flavors;
9873 struct nfs4_secinfo4 *secinfo;
9874 int i;
9875
9876 page = alloc_page(GFP_KERNEL);
9877 if (!page) {
9878 err = -ENOMEM;
9879 goto out;
9880 }
9881
9882 flavors = page_address(page);
9883 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9884
9885
9886
9887
9888
9889 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
9890 err = nfs4_find_root_sec(server, fhandle, info);
9891 goto out_freepage;
9892 }
9893 if (err)
9894 goto out_freepage;
9895
9896 for (i = 0; i < flavors->num_flavors; i++) {
9897 secinfo = &flavors->flavors[i];
9898
9899 switch (secinfo->flavor) {
9900 case RPC_AUTH_NULL:
9901 case RPC_AUTH_UNIX:
9902 case RPC_AUTH_GSS:
9903 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9904 &secinfo->flavor_info);
9905 break;
9906 default:
9907 flavor = RPC_AUTH_MAXFLAVOR;
9908 break;
9909 }
9910
9911 if (!nfs_auth_info_match(&server->auth_info, flavor))
9912 flavor = RPC_AUTH_MAXFLAVOR;
9913
9914 if (flavor != RPC_AUTH_MAXFLAVOR) {
9915 err = nfs4_lookup_root_sec(server, fhandle,
9916 info, flavor);
9917 if (!err)
9918 break;
9919 }
9920 }
9921
9922 if (flavor == RPC_AUTH_MAXFLAVOR)
9923 err = -EPERM;
9924
9925out_freepage:
9926 put_page(page);
9927 if (err == -EACCES)
9928 return -EPERM;
9929out:
9930 return err;
9931}
9932
9933static int _nfs41_test_stateid(struct nfs_server *server,
9934 nfs4_stateid *stateid,
9935 const struct cred *cred)
9936{
9937 int status;
9938 struct nfs41_test_stateid_args args = {
9939 .stateid = stateid,
9940 };
9941 struct nfs41_test_stateid_res res;
9942 struct rpc_message msg = {
9943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9944 .rpc_argp = &args,
9945 .rpc_resp = &res,
9946 .rpc_cred = cred,
9947 };
9948 struct rpc_clnt *rpc_client = server->client;
9949
9950 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9951 &rpc_client, &msg);
9952
9953 dprintk("NFS call test_stateid %p\n", stateid);
9954 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
9955 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9956 &args.seq_args, &res.seq_res);
9957 if (status != NFS_OK) {
9958 dprintk("NFS reply test_stateid: failed, %d\n", status);
9959 return status;
9960 }
9961 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9962 return -res.status;
9963}
9964
9965static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9966 int err, struct nfs4_exception *exception)
9967{
9968 exception->retry = 0;
9969 switch(err) {
9970 case -NFS4ERR_DELAY:
9971 case -NFS4ERR_RETRY_UNCACHED_REP:
9972 nfs4_handle_exception(server, err, exception);
9973 break;
9974 case -NFS4ERR_BADSESSION:
9975 case -NFS4ERR_BADSLOT:
9976 case -NFS4ERR_BAD_HIGH_SLOT:
9977 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9978 case -NFS4ERR_DEADSESSION:
9979 nfs4_do_handle_exception(server, err, exception);
9980 }
9981}
9982
9983
9984
9985
9986
9987
9988
9989
9990
9991
9992
9993
9994static int nfs41_test_stateid(struct nfs_server *server,
9995 nfs4_stateid *stateid,
9996 const struct cred *cred)
9997{
9998 struct nfs4_exception exception = {
9999 .interruptible = true,
10000 };
10001 int err;
10002 do {
10003 err = _nfs41_test_stateid(server, stateid, cred);
10004 nfs4_handle_delay_or_session_error(server, err, &exception);
10005 } while (exception.retry);
10006 return err;
10007}
10008
10009struct nfs_free_stateid_data {
10010 struct nfs_server *server;
10011 struct nfs41_free_stateid_args args;
10012 struct nfs41_free_stateid_res res;
10013};
10014
10015static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10016{
10017 struct nfs_free_stateid_data *data = calldata;
10018 nfs4_setup_sequence(data->server->nfs_client,
10019 &data->args.seq_args,
10020 &data->res.seq_res,
10021 task);
10022}
10023
10024static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10025{
10026 struct nfs_free_stateid_data *data = calldata;
10027
10028 nfs41_sequence_done(task, &data->res.seq_res);
10029
10030 switch (task->tk_status) {
10031 case -NFS4ERR_DELAY:
10032 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
10033 rpc_restart_call_prepare(task);
10034 }
10035}
10036
10037static void nfs41_free_stateid_release(void *calldata)
10038{
10039 kfree(calldata);
10040}
10041
10042static const struct rpc_call_ops nfs41_free_stateid_ops = {
10043 .rpc_call_prepare = nfs41_free_stateid_prepare,
10044 .rpc_call_done = nfs41_free_stateid_done,
10045 .rpc_release = nfs41_free_stateid_release,
10046};
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058static int nfs41_free_stateid(struct nfs_server *server,
10059 const nfs4_stateid *stateid,
10060 const struct cred *cred,
10061 bool privileged)
10062{
10063 struct rpc_message msg = {
10064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
10065 .rpc_cred = cred,
10066 };
10067 struct rpc_task_setup task_setup = {
10068 .rpc_client = server->client,
10069 .rpc_message = &msg,
10070 .callback_ops = &nfs41_free_stateid_ops,
10071 .flags = RPC_TASK_ASYNC,
10072 };
10073 struct nfs_free_stateid_data *data;
10074 struct rpc_task *task;
10075
10076 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10077 &task_setup.rpc_client, &msg);
10078
10079 dprintk("NFS call free_stateid %p\n", stateid);
10080 data = kmalloc(sizeof(*data), GFP_NOFS);
10081 if (!data)
10082 return -ENOMEM;
10083 data->server = server;
10084 nfs4_stateid_copy(&data->args.stateid, stateid);
10085
10086 task_setup.callback_data = data;
10087
10088 msg.rpc_argp = &data->args;
10089 msg.rpc_resp = &data->res;
10090 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
10091 task = rpc_run_task(&task_setup);
10092 if (IS_ERR(task))
10093 return PTR_ERR(task);
10094 rpc_put_task(task);
10095 return 0;
10096}
10097
10098static void
10099nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
10100{
10101 const struct cred *cred = lsp->ls_state->owner->so_cred;
10102
10103 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
10104 nfs4_free_lock_state(server, lsp);
10105}
10106
10107static bool nfs41_match_stateid(const nfs4_stateid *s1,
10108 const nfs4_stateid *s2)
10109{
10110 if (s1->type != s2->type)
10111 return false;
10112
10113 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
10114 return false;
10115
10116 if (s1->seqid == s2->seqid)
10117 return true;
10118
10119 return s1->seqid == 0 || s2->seqid == 0;
10120}
10121
10122#endif
10123
10124static bool nfs4_match_stateid(const nfs4_stateid *s1,
10125 const nfs4_stateid *s2)
10126{
10127 return nfs4_stateid_match(s1, s2);
10128}
10129
10130
10131static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
10132 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10133 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10134 .recover_open = nfs4_open_reclaim,
10135 .recover_lock = nfs4_lock_reclaim,
10136 .establish_clid = nfs4_init_clientid,
10137 .detect_trunking = nfs40_discover_server_trunking,
10138};
10139
10140#if defined(CONFIG_NFS_V4_1)
10141static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
10142 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10143 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10144 .recover_open = nfs4_open_reclaim,
10145 .recover_lock = nfs4_lock_reclaim,
10146 .establish_clid = nfs41_init_clientid,
10147 .reclaim_complete = nfs41_proc_reclaim_complete,
10148 .detect_trunking = nfs41_discover_server_trunking,
10149};
10150#endif
10151
10152static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
10153 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10154 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
10155 .recover_open = nfs40_open_expired,
10156 .recover_lock = nfs4_lock_expired,
10157 .establish_clid = nfs4_init_clientid,
10158};
10159
10160#if defined(CONFIG_NFS_V4_1)
10161static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
10162 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10163 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
10164 .recover_open = nfs41_open_expired,
10165 .recover_lock = nfs41_lock_expired,
10166 .establish_clid = nfs41_init_clientid,
10167};
10168#endif
10169
10170static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
10171 .sched_state_renewal = nfs4_proc_async_renew,
10172 .get_state_renewal_cred = nfs4_get_renew_cred,
10173 .renew_lease = nfs4_proc_renew,
10174};
10175
10176#if defined(CONFIG_NFS_V4_1)
10177static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
10178 .sched_state_renewal = nfs41_proc_async_sequence,
10179 .get_state_renewal_cred = nfs4_get_machine_cred,
10180 .renew_lease = nfs4_proc_sequence,
10181};
10182#endif
10183
10184static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
10185 .get_locations = _nfs40_proc_get_locations,
10186 .fsid_present = _nfs40_proc_fsid_present,
10187};
10188
10189#if defined(CONFIG_NFS_V4_1)
10190static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
10191 .get_locations = _nfs41_proc_get_locations,
10192 .fsid_present = _nfs41_proc_fsid_present,
10193};
10194#endif
10195
10196static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10197 .minor_version = 0,
10198 .init_caps = NFS_CAP_READDIRPLUS
10199 | NFS_CAP_ATOMIC_OPEN
10200 | NFS_CAP_POSIX_LOCK,
10201 .init_client = nfs40_init_client,
10202 .shutdown_client = nfs40_shutdown_client,
10203 .match_stateid = nfs4_match_stateid,
10204 .find_root_sec = nfs4_find_root_sec,
10205 .free_lock_state = nfs4_release_lockowner,
10206 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
10207 .alloc_seqid = nfs_alloc_seqid,
10208 .call_sync_ops = &nfs40_call_sync_ops,
10209 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10210 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10211 .state_renewal_ops = &nfs40_state_renewal_ops,
10212 .mig_recovery_ops = &nfs40_mig_recovery_ops,
10213};
10214
10215#if defined(CONFIG_NFS_V4_1)
10216static struct nfs_seqid *
10217nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10218{
10219 return NULL;
10220}
10221
10222static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10223 .minor_version = 1,
10224 .init_caps = NFS_CAP_READDIRPLUS
10225 | NFS_CAP_ATOMIC_OPEN
10226 | NFS_CAP_POSIX_LOCK
10227 | NFS_CAP_STATEID_NFSV41
10228 | NFS_CAP_ATOMIC_OPEN_V1
10229 | NFS_CAP_LGOPEN,
10230 .init_client = nfs41_init_client,
10231 .shutdown_client = nfs41_shutdown_client,
10232 .match_stateid = nfs41_match_stateid,
10233 .find_root_sec = nfs41_find_root_sec,
10234 .free_lock_state = nfs41_free_lock_state,
10235 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
10236 .alloc_seqid = nfs_alloc_no_seqid,
10237 .session_trunk = nfs4_test_session_trunk,
10238 .call_sync_ops = &nfs41_call_sync_ops,
10239 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10240 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10241 .state_renewal_ops = &nfs41_state_renewal_ops,
10242 .mig_recovery_ops = &nfs41_mig_recovery_ops,
10243};
10244#endif
10245
10246#if defined(CONFIG_NFS_V4_2)
10247static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10248 .minor_version = 2,
10249 .init_caps = NFS_CAP_READDIRPLUS
10250 | NFS_CAP_ATOMIC_OPEN
10251 | NFS_CAP_POSIX_LOCK
10252 | NFS_CAP_STATEID_NFSV41
10253 | NFS_CAP_ATOMIC_OPEN_V1
10254 | NFS_CAP_LGOPEN
10255 | NFS_CAP_ALLOCATE
10256 | NFS_CAP_COPY
10257 | NFS_CAP_OFFLOAD_CANCEL
10258 | NFS_CAP_COPY_NOTIFY
10259 | NFS_CAP_DEALLOCATE
10260 | NFS_CAP_SEEK
10261 | NFS_CAP_LAYOUTSTATS
10262 | NFS_CAP_CLONE
10263 | NFS_CAP_LAYOUTERROR
10264 | NFS_CAP_READ_PLUS,
10265 .init_client = nfs41_init_client,
10266 .shutdown_client = nfs41_shutdown_client,
10267 .match_stateid = nfs41_match_stateid,
10268 .find_root_sec = nfs41_find_root_sec,
10269 .free_lock_state = nfs41_free_lock_state,
10270 .call_sync_ops = &nfs41_call_sync_ops,
10271 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
10272 .alloc_seqid = nfs_alloc_no_seqid,
10273 .session_trunk = nfs4_test_session_trunk,
10274 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10275 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10276 .state_renewal_ops = &nfs41_state_renewal_ops,
10277 .mig_recovery_ops = &nfs41_mig_recovery_ops,
10278};
10279#endif
10280
10281const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10282 [0] = &nfs_v4_0_minor_ops,
10283#if defined(CONFIG_NFS_V4_1)
10284 [1] = &nfs_v4_1_minor_ops,
10285#endif
10286#if defined(CONFIG_NFS_V4_2)
10287 [2] = &nfs_v4_2_minor_ops,
10288#endif
10289};
10290
10291static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
10292{
10293 ssize_t error, error2, error3;
10294
10295 error = generic_listxattr(dentry, list, size);
10296 if (error < 0)
10297 return error;
10298 if (list) {
10299 list += error;
10300 size -= error;
10301 }
10302
10303 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10304 if (error2 < 0)
10305 return error2;
10306
10307 if (list) {
10308 list += error2;
10309 size -= error2;
10310 }
10311
10312 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size);
10313 if (error3 < 0)
10314 return error3;
10315
10316 return error + error2 + error3;
10317}
10318
10319static const struct inode_operations nfs4_dir_inode_operations = {
10320 .create = nfs_create,
10321 .lookup = nfs_lookup,
10322 .atomic_open = nfs_atomic_open,
10323 .link = nfs_link,
10324 .unlink = nfs_unlink,
10325 .symlink = nfs_symlink,
10326 .mkdir = nfs_mkdir,
10327 .rmdir = nfs_rmdir,
10328 .mknod = nfs_mknod,
10329 .rename = nfs_rename,
10330 .permission = nfs_permission,
10331 .getattr = nfs_getattr,
10332 .setattr = nfs_setattr,
10333 .listxattr = nfs4_listxattr,
10334};
10335
10336static const struct inode_operations nfs4_file_inode_operations = {
10337 .permission = nfs_permission,
10338 .getattr = nfs_getattr,
10339 .setattr = nfs_setattr,
10340 .listxattr = nfs4_listxattr,
10341};
10342
10343const struct nfs_rpc_ops nfs_v4_clientops = {
10344 .version = 4,
10345 .dentry_ops = &nfs4_dentry_operations,
10346 .dir_inode_ops = &nfs4_dir_inode_operations,
10347 .file_inode_ops = &nfs4_file_inode_operations,
10348 .file_ops = &nfs4_file_operations,
10349 .getroot = nfs4_proc_get_root,
10350 .submount = nfs4_submount,
10351 .try_get_tree = nfs4_try_get_tree,
10352 .getattr = nfs4_proc_getattr,
10353 .setattr = nfs4_proc_setattr,
10354 .lookup = nfs4_proc_lookup,
10355 .lookupp = nfs4_proc_lookupp,
10356 .access = nfs4_proc_access,
10357 .readlink = nfs4_proc_readlink,
10358 .create = nfs4_proc_create,
10359 .remove = nfs4_proc_remove,
10360 .unlink_setup = nfs4_proc_unlink_setup,
10361 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
10362 .unlink_done = nfs4_proc_unlink_done,
10363 .rename_setup = nfs4_proc_rename_setup,
10364 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
10365 .rename_done = nfs4_proc_rename_done,
10366 .link = nfs4_proc_link,
10367 .symlink = nfs4_proc_symlink,
10368 .mkdir = nfs4_proc_mkdir,
10369 .rmdir = nfs4_proc_rmdir,
10370 .readdir = nfs4_proc_readdir,
10371 .mknod = nfs4_proc_mknod,
10372 .statfs = nfs4_proc_statfs,
10373 .fsinfo = nfs4_proc_fsinfo,
10374 .pathconf = nfs4_proc_pathconf,
10375 .set_capabilities = nfs4_server_capabilities,
10376 .decode_dirent = nfs4_decode_dirent,
10377 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
10378 .read_setup = nfs4_proc_read_setup,
10379 .read_done = nfs4_read_done,
10380 .write_setup = nfs4_proc_write_setup,
10381 .write_done = nfs4_write_done,
10382 .commit_setup = nfs4_proc_commit_setup,
10383 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
10384 .commit_done = nfs4_commit_done,
10385 .lock = nfs4_proc_lock,
10386 .clear_acl_cache = nfs4_zap_acl_attr,
10387 .close_context = nfs4_close_context,
10388 .open_context = nfs4_atomic_open,
10389 .have_delegation = nfs4_have_delegation,
10390 .alloc_client = nfs4_alloc_client,
10391 .init_client = nfs4_init_client,
10392 .free_client = nfs4_free_client,
10393 .create_server = nfs4_create_server,
10394 .clone_server = nfs_clone_server,
10395};
10396
10397static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
10398 .name = XATTR_NAME_NFSV4_ACL,
10399 .list = nfs4_xattr_list_nfs4_acl,
10400 .get = nfs4_xattr_get_nfs4_acl,
10401 .set = nfs4_xattr_set_nfs4_acl,
10402};
10403
10404#ifdef CONFIG_NFS_V4_2
10405static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10406 .prefix = XATTR_USER_PREFIX,
10407 .get = nfs4_xattr_get_nfs4_user,
10408 .set = nfs4_xattr_set_nfs4_user,
10409};
10410#endif
10411
10412const struct xattr_handler *nfs4_xattr_handlers[] = {
10413 &nfs4_xattr_nfs4_acl_handler,
10414#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10415 &nfs4_xattr_nfs4_label_handler,
10416#endif
10417#ifdef CONFIG_NFS_V4_2
10418 &nfs4_xattr_nfs4_user_handler,
10419#endif
10420 NULL
10421};
10422
10423
10424
10425
10426
10427
10428