4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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>
60 #include "delegation.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
70 #include "nfs4trace.h"
72 #define NFSDBG_FACILITY NFSDBG_PROC
74 #define NFS4_BITMASK_SZ 3
76 #define NFS4_POLL_RETRY_MIN (HZ/10)
77 #define NFS4_POLL_RETRY_MAX (15*HZ)
79 /* file attributes which can be mapped to nfs attributes */
80 #define NFS4_VALID_ATTRS (ATTR_MODE \
91 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
92 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
93 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
94 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
95 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
97 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
99 #ifdef CONFIG_NFS_V4_1
100 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
101 const struct cred *cred,
102 struct nfs4_slot *slot,
104 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
105 const struct cred *);
106 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
107 const struct cred *, bool);
110 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
111 static inline struct nfs4_label *
112 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
113 struct iattr *sattr, struct nfs4_label *label)
120 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
123 err = security_dentry_init_security(dentry, sattr->ia_mode,
124 &dentry->d_name, (void **)&label->label, &label->len);
131 nfs4_label_release_security(struct nfs4_label *label)
134 security_release_secctx(label->label, label->len);
136 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139 return server->attr_bitmask;
141 return server->attr_bitmask_nl;
144 static inline struct nfs4_label *
145 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
146 struct iattr *sattr, struct nfs4_label *l)
149 nfs4_label_release_security(struct nfs4_label *label)
152 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
153 { return server->attr_bitmask; }
156 /* Prevent leaks of NFSv4 errors into userland */
157 static int nfs4_map_errors(int err)
162 case -NFS4ERR_RESOURCE:
163 case -NFS4ERR_LAYOUTTRYLATER:
164 case -NFS4ERR_RECALLCONFLICT:
166 case -NFS4ERR_WRONGSEC:
167 case -NFS4ERR_WRONG_CRED:
169 case -NFS4ERR_BADOWNER:
170 case -NFS4ERR_BADNAME:
172 case -NFS4ERR_SHARE_DENIED:
174 case -NFS4ERR_MINOR_VERS_MISMATCH:
175 return -EPROTONOSUPPORT;
176 case -NFS4ERR_FILE_OPEN:
179 dprintk("%s could not handle NFSv4 error %d\n",
187 * This is our standard bitmap for GETATTR requests.
189 const u32 nfs4_fattr_bitmap[3] = {
191 | FATTR4_WORD0_CHANGE
194 | FATTR4_WORD0_FILEID,
196 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID,
205 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
206 FATTR4_WORD2_SECURITY_LABEL
210 static const u32 nfs4_pnfs_open_bitmap[3] = {
212 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
217 | FATTR4_WORD1_NUMLINKS
219 | FATTR4_WORD1_OWNER_GROUP
220 | FATTR4_WORD1_RAWDEV
221 | FATTR4_WORD1_SPACE_USED
222 | FATTR4_WORD1_TIME_ACCESS
223 | FATTR4_WORD1_TIME_METADATA
224 | FATTR4_WORD1_TIME_MODIFY,
225 FATTR4_WORD2_MDSTHRESHOLD
226 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
227 | FATTR4_WORD2_SECURITY_LABEL
231 static const u32 nfs4_open_noattr_bitmap[3] = {
233 | FATTR4_WORD0_FILEID,
236 const u32 nfs4_statfs_bitmap[3] = {
237 FATTR4_WORD0_FILES_AVAIL
238 | FATTR4_WORD0_FILES_FREE
239 | FATTR4_WORD0_FILES_TOTAL,
240 FATTR4_WORD1_SPACE_AVAIL
241 | FATTR4_WORD1_SPACE_FREE
242 | FATTR4_WORD1_SPACE_TOTAL
245 const u32 nfs4_pathconf_bitmap[3] = {
247 | FATTR4_WORD0_MAXNAME,
251 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
252 | FATTR4_WORD0_MAXREAD
253 | FATTR4_WORD0_MAXWRITE
254 | FATTR4_WORD0_LEASE_TIME,
255 FATTR4_WORD1_TIME_DELTA
256 | FATTR4_WORD1_FS_LAYOUT_TYPES,
257 FATTR4_WORD2_LAYOUT_BLKSIZE
258 | FATTR4_WORD2_CLONE_BLKSIZE
261 const u32 nfs4_fs_locations_bitmap[3] = {
265 | FATTR4_WORD0_FILEID
266 | FATTR4_WORD0_FS_LOCATIONS,
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
277 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
280 unsigned long cache_validity;
282 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
283 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
286 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
287 if (!(cache_validity & NFS_INO_REVAL_FORCED))
288 cache_validity &= ~(NFS_INO_INVALID_CHANGE
289 | NFS_INO_INVALID_SIZE);
291 if (!(cache_validity & NFS_INO_INVALID_SIZE))
292 dst[0] &= ~FATTR4_WORD0_SIZE;
294 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
295 dst[0] &= ~FATTR4_WORD0_CHANGE;
298 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
299 const __u32 *src, struct inode *inode)
301 nfs4_bitmap_copy_adjust(dst, src, inode);
304 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
305 struct nfs4_readdir_arg *readdir)
307 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
311 readdir->cookie = cookie;
312 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
317 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
322 * NFSv4 servers do not return entries for '.' and '..'
323 * Therefore, we fake these entries here. We let '.'
324 * have cookie 0 and '..' have cookie 1. Note that
325 * when talking to the server, we always send cookie 0
328 start = p = kmap_atomic(*readdir->pages);
331 *p++ = xdr_one; /* next */
332 *p++ = xdr_zero; /* cookie, first word */
333 *p++ = xdr_one; /* cookie, second word */
334 *p++ = xdr_one; /* entry len */
335 memcpy(p, ".\0\0\0", 4); /* entry */
337 *p++ = xdr_one; /* bitmap length */
338 *p++ = htonl(attrs); /* bitmap */
339 *p++ = htonl(12); /* attribute buffer length */
340 *p++ = htonl(NF4DIR);
341 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
344 *p++ = xdr_one; /* next */
345 *p++ = xdr_zero; /* cookie, first word */
346 *p++ = xdr_two; /* cookie, second word */
347 *p++ = xdr_two; /* entry len */
348 memcpy(p, "..\0\0", 4); /* entry */
350 *p++ = xdr_one; /* bitmap length */
351 *p++ = htonl(attrs); /* bitmap */
352 *p++ = htonl(12); /* attribute buffer length */
353 *p++ = htonl(NF4DIR);
354 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
356 readdir->pgbase = (char *)p - (char *)start;
357 readdir->count -= readdir->pgbase;
358 kunmap_atomic(start);
361 static void nfs4_test_and_free_stateid(struct nfs_server *server,
362 nfs4_stateid *stateid,
363 const struct cred *cred)
365 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
367 ops->test_and_free_expired(server, stateid, cred);
370 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
371 nfs4_stateid *stateid,
372 const struct cred *cred)
374 stateid->type = NFS4_REVOKED_STATEID_TYPE;
375 nfs4_test_and_free_stateid(server, stateid, cred);
378 static void nfs4_free_revoked_stateid(struct nfs_server *server,
379 const nfs4_stateid *stateid,
380 const struct cred *cred)
384 nfs4_stateid_copy(&tmp, stateid);
385 __nfs4_free_revoked_stateid(server, &tmp, cred);
388 static long nfs4_update_delay(long *timeout)
392 return NFS4_POLL_RETRY_MAX;
394 *timeout = NFS4_POLL_RETRY_MIN;
395 if (*timeout > NFS4_POLL_RETRY_MAX)
396 *timeout = NFS4_POLL_RETRY_MAX;
402 static int nfs4_delay_killable(long *timeout)
406 freezable_schedule_timeout_killable_unsafe(
407 nfs4_update_delay(timeout));
408 if (!__fatal_signal_pending(current))
413 static int nfs4_delay_interruptible(long *timeout)
417 freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout));
418 if (!signal_pending(current))
420 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
423 static int nfs4_delay(long *timeout, bool interruptible)
426 return nfs4_delay_interruptible(timeout);
427 return nfs4_delay_killable(timeout);
430 static const nfs4_stateid *
431 nfs4_recoverable_stateid(const nfs4_stateid *stateid)
435 switch (stateid->type) {
436 case NFS4_OPEN_STATEID_TYPE:
437 case NFS4_LOCK_STATEID_TYPE:
438 case NFS4_DELEGATION_STATEID_TYPE:
446 /* This is the error handling routine for processes that are allowed
449 static int nfs4_do_handle_exception(struct nfs_server *server,
450 int errorcode, struct nfs4_exception *exception)
452 struct nfs_client *clp = server->nfs_client;
453 struct nfs4_state *state = exception->state;
454 const nfs4_stateid *stateid;
455 struct inode *inode = exception->inode;
458 exception->delay = 0;
459 exception->recovering = 0;
460 exception->retry = 0;
462 stateid = nfs4_recoverable_stateid(exception->stateid);
463 if (stateid == NULL && state != NULL)
464 stateid = nfs4_recoverable_stateid(&state->stateid);
469 case -NFS4ERR_BADHANDLE:
471 if (inode != NULL && S_ISREG(inode->i_mode))
472 pnfs_destroy_layout(NFS_I(inode));
474 case -NFS4ERR_DELEG_REVOKED:
475 case -NFS4ERR_ADMIN_REVOKED:
476 case -NFS4ERR_EXPIRED:
477 case -NFS4ERR_BAD_STATEID:
478 case -NFS4ERR_PARTNER_NO_AUTH:
479 if (inode != NULL && stateid != NULL) {
480 nfs_inode_find_state_and_recover(inode,
482 goto wait_on_recovery;
485 case -NFS4ERR_OPENMODE:
489 err = nfs_async_inode_return_delegation(inode,
492 goto wait_on_recovery;
493 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
494 exception->retry = 1;
500 ret = nfs4_schedule_stateid_recovery(server, state);
503 goto wait_on_recovery;
504 case -NFS4ERR_STALE_STATEID:
505 case -NFS4ERR_STALE_CLIENTID:
506 nfs4_schedule_lease_recovery(clp);
507 goto wait_on_recovery;
509 ret = nfs4_schedule_migration_recovery(server);
512 goto wait_on_recovery;
513 case -NFS4ERR_LEASE_MOVED:
514 nfs4_schedule_lease_moved_recovery(clp);
515 goto wait_on_recovery;
516 #if defined(CONFIG_NFS_V4_1)
517 case -NFS4ERR_BADSESSION:
518 case -NFS4ERR_BADSLOT:
519 case -NFS4ERR_BAD_HIGH_SLOT:
520 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
521 case -NFS4ERR_DEADSESSION:
522 case -NFS4ERR_SEQ_FALSE_RETRY:
523 case -NFS4ERR_SEQ_MISORDERED:
524 /* Handled in nfs41_sequence_process() */
525 goto wait_on_recovery;
526 #endif /* defined(CONFIG_NFS_V4_1) */
527 case -NFS4ERR_FILE_OPEN:
528 if (exception->timeout > HZ) {
529 /* We have retried a decent amount, time to
537 nfs_inc_server_stats(server, NFSIOS_DELAY);
540 case -NFS4ERR_LAYOUTTRYLATER:
541 case -NFS4ERR_RECALLCONFLICT:
542 exception->delay = 1;
545 case -NFS4ERR_RETRY_UNCACHED_REP:
546 case -NFS4ERR_OLD_STATEID:
547 exception->retry = 1;
549 case -NFS4ERR_BADOWNER:
550 /* The following works around a Linux server bug! */
551 case -NFS4ERR_BADNAME:
552 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
553 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
554 exception->retry = 1;
555 printk(KERN_WARNING "NFS: v4 server %s "
556 "does not accept raw "
558 "Reenabling the idmapper.\n",
559 server->nfs_client->cl_hostname);
562 /* We failed to handle the error */
563 return nfs4_map_errors(ret);
565 exception->recovering = 1;
569 /* This is the error handling routine for processes that are allowed
572 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
574 struct nfs_client *clp = server->nfs_client;
577 ret = nfs4_do_handle_exception(server, errorcode, exception);
578 if (exception->delay) {
579 ret = nfs4_delay(&exception->timeout,
580 exception->interruptible);
583 if (exception->recovering) {
584 ret = nfs4_wait_clnt_recover(clp);
585 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
592 exception->retry = 1;
597 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
598 int errorcode, struct nfs4_exception *exception)
600 struct nfs_client *clp = server->nfs_client;
603 ret = nfs4_do_handle_exception(server, errorcode, exception);
604 if (exception->delay) {
605 rpc_delay(task, nfs4_update_delay(&exception->timeout));
608 if (exception->recovering) {
609 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
610 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
611 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
614 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
619 exception->retry = 1;
621 * For NFS4ERR_MOVED, the client transport will need to
622 * be recomputed after migration recovery has completed.
624 if (errorcode == -NFS4ERR_MOVED)
625 rpc_task_release_transport(task);
631 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
632 struct nfs4_state *state, long *timeout)
634 struct nfs4_exception exception = {
638 if (task->tk_status >= 0)
641 exception.timeout = *timeout;
642 task->tk_status = nfs4_async_handle_exception(task, server,
645 if (exception.delay && timeout)
646 *timeout = exception.timeout;
653 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
654 * or 'false' otherwise.
656 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
658 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
659 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
662 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
664 spin_lock(&clp->cl_lock);
665 if (time_before(clp->cl_last_renewal,timestamp))
666 clp->cl_last_renewal = timestamp;
667 spin_unlock(&clp->cl_lock);
670 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
672 struct nfs_client *clp = server->nfs_client;
674 if (!nfs4_has_session(clp))
675 do_renew_lease(clp, timestamp);
678 struct nfs4_call_sync_data {
679 const struct nfs_server *seq_server;
680 struct nfs4_sequence_args *seq_args;
681 struct nfs4_sequence_res *seq_res;
684 void nfs4_init_sequence(struct nfs4_sequence_args *args,
685 struct nfs4_sequence_res *res, int cache_reply,
688 args->sa_slot = NULL;
689 args->sa_cache_this = cache_reply;
690 args->sa_privileged = privileged;
695 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
697 struct nfs4_slot *slot = res->sr_slot;
698 struct nfs4_slot_table *tbl;
701 spin_lock(&tbl->slot_tbl_lock);
702 if (!nfs41_wake_and_assign_slot(tbl, slot))
703 nfs4_free_slot(tbl, slot);
704 spin_unlock(&tbl->slot_tbl_lock);
709 static int nfs40_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
712 if (res->sr_slot != NULL)
713 nfs40_sequence_free_slot(res);
717 #if defined(CONFIG_NFS_V4_1)
719 static void nfs41_release_slot(struct nfs4_slot *slot)
721 struct nfs4_session *session;
722 struct nfs4_slot_table *tbl;
723 bool send_new_highest_used_slotid = false;
728 session = tbl->session;
730 /* Bump the slot sequence number */
735 spin_lock(&tbl->slot_tbl_lock);
736 /* Be nice to the server: try to ensure that the last transmitted
737 * value for highest_user_slotid <= target_highest_slotid
739 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
740 send_new_highest_used_slotid = true;
742 if (nfs41_wake_and_assign_slot(tbl, slot)) {
743 send_new_highest_used_slotid = false;
746 nfs4_free_slot(tbl, slot);
748 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
749 send_new_highest_used_slotid = false;
751 spin_unlock(&tbl->slot_tbl_lock);
752 if (send_new_highest_used_slotid)
753 nfs41_notify_server(session->clp);
754 if (waitqueue_active(&tbl->slot_waitq))
755 wake_up_all(&tbl->slot_waitq);
758 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
760 nfs41_release_slot(res->sr_slot);
764 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
767 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
768 slot->seq_nr_highest_sent = seqnr;
770 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
773 slot->seq_nr_highest_sent = seqnr;
774 slot->seq_nr_last_acked = seqnr;
777 static int nfs41_sequence_process(struct rpc_task *task,
778 struct nfs4_sequence_res *res)
780 struct nfs4_session *session;
781 struct nfs4_slot *slot = res->sr_slot;
782 struct nfs_client *clp;
788 /* don't increment the sequence number if the task wasn't sent */
789 if (!RPC_WAS_SENT(task) || slot->seq_done)
792 session = slot->table->session;
794 trace_nfs4_sequence_done(session, res);
796 status = res->sr_status;
797 if (task->tk_status == -NFS4ERR_DEADSESSION)
798 status = -NFS4ERR_DEADSESSION;
800 /* Check the SEQUENCE operation status */
803 /* Mark this sequence number as having been acked */
804 nfs4_slot_sequence_acked(slot, slot->seq_nr);
805 /* Update the slot's sequence and clientid lease timer */
808 do_renew_lease(clp, res->sr_timestamp);
809 /* Check sequence flags */
810 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
812 nfs41_update_target_slotid(slot->table, slot, res);
816 * sr_status remains 1 if an RPC level error occurred.
817 * The server may or may not have processed the sequence
820 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
824 /* The server detected a resend of the RPC call and
825 * returned NFS4ERR_DELAY as per Section 2.10.6.2
828 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
832 nfs4_slot_sequence_acked(slot, slot->seq_nr);
834 case -NFS4ERR_RETRY_UNCACHED_REP:
835 case -NFS4ERR_SEQ_FALSE_RETRY:
837 * The server thinks we tried to replay a request.
838 * Retry the call after bumping the sequence ID.
840 nfs4_slot_sequence_acked(slot, slot->seq_nr);
842 case -NFS4ERR_BADSLOT:
844 * The slot id we used was probably retired. Try again
845 * using a different slot id.
847 if (slot->slot_nr < slot->table->target_highest_slotid)
848 goto session_recover;
850 case -NFS4ERR_SEQ_MISORDERED:
851 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
853 * Were one or more calls using this slot interrupted?
854 * If the server never received the request, then our
855 * transmitted slot sequence number may be too high.
857 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
863 * A retry might be sent while the original request is
864 * still in progress on the replier. The replier SHOULD
865 * deal with the issue by returning NFS4ERR_DELAY as the
866 * reply to SEQUENCE or CB_SEQUENCE operation, but
867 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
869 * Restart the search after a delay.
871 slot->seq_nr = slot->seq_nr_highest_sent;
873 case -NFS4ERR_BADSESSION:
874 case -NFS4ERR_DEADSESSION:
875 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
876 goto session_recover;
878 /* Just update the slot sequence no. */
882 /* The session may be reset by one of the error handlers. */
883 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
887 nfs4_schedule_session_recovery(session, status);
888 dprintk("%s ERROR: %d Reset session\n", __func__, status);
889 nfs41_sequence_free_slot(res);
894 if (rpc_restart_call_prepare(task)) {
895 nfs41_sequence_free_slot(res);
901 if (!rpc_restart_call(task))
903 rpc_delay(task, NFS4_POLL_RETRY_MAX);
907 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
909 if (!nfs41_sequence_process(task, res))
911 if (res->sr_slot != NULL)
912 nfs41_sequence_free_slot(res);
916 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
918 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
920 if (res->sr_slot == NULL)
922 if (res->sr_slot->table->session != NULL)
923 return nfs41_sequence_process(task, res);
924 return nfs40_sequence_done(task, res);
927 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
929 if (res->sr_slot != NULL) {
930 if (res->sr_slot->table->session != NULL)
931 nfs41_sequence_free_slot(res);
933 nfs40_sequence_free_slot(res);
937 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
939 if (res->sr_slot == NULL)
941 if (!res->sr_slot->table->session)
942 return nfs40_sequence_done(task, res);
943 return nfs41_sequence_done(task, res);
945 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
947 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
949 struct nfs4_call_sync_data *data = calldata;
951 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
953 nfs4_setup_sequence(data->seq_server->nfs_client,
954 data->seq_args, data->seq_res, task);
957 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
959 struct nfs4_call_sync_data *data = calldata;
961 nfs41_sequence_done(task, data->seq_res);
964 static const struct rpc_call_ops nfs41_call_sync_ops = {
965 .rpc_call_prepare = nfs41_call_sync_prepare,
966 .rpc_call_done = nfs41_call_sync_done,
969 #else /* !CONFIG_NFS_V4_1 */
971 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
973 return nfs40_sequence_done(task, res);
976 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
978 if (res->sr_slot != NULL)
979 nfs40_sequence_free_slot(res);
982 int nfs4_sequence_done(struct rpc_task *task,
983 struct nfs4_sequence_res *res)
985 return nfs40_sequence_done(task, res);
987 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
989 #endif /* !CONFIG_NFS_V4_1 */
991 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
993 res->sr_timestamp = jiffies;
994 res->sr_status_flags = 0;
999 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1000 struct nfs4_sequence_res *res,
1001 struct nfs4_slot *slot)
1005 slot->privileged = args->sa_privileged ? 1 : 0;
1006 args->sa_slot = slot;
1008 res->sr_slot = slot;
1011 int nfs4_setup_sequence(struct nfs_client *client,
1012 struct nfs4_sequence_args *args,
1013 struct nfs4_sequence_res *res,
1014 struct rpc_task *task)
1016 struct nfs4_session *session = nfs4_get_session(client);
1017 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
1018 struct nfs4_slot *slot;
1020 /* slot already allocated? */
1021 if (res->sr_slot != NULL)
1025 tbl = &session->fc_slot_table;
1027 spin_lock(&tbl->slot_tbl_lock);
1028 /* The state manager will wait until the slot table is empty */
1029 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1032 slot = nfs4_alloc_slot(tbl);
1034 if (slot == ERR_PTR(-ENOMEM))
1035 goto out_sleep_timeout;
1038 spin_unlock(&tbl->slot_tbl_lock);
1040 nfs4_sequence_attach_slot(args, res, slot);
1042 trace_nfs4_setup_sequence(session, args);
1044 nfs41_sequence_res_init(res);
1045 rpc_call_start(task);
1048 /* Try again in 1/4 second */
1049 if (args->sa_privileged)
1050 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1051 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1053 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1054 NULL, jiffies + (HZ >> 2));
1055 spin_unlock(&tbl->slot_tbl_lock);
1058 if (args->sa_privileged)
1059 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
1060 RPC_PRIORITY_PRIVILEGED);
1062 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1063 spin_unlock(&tbl->slot_tbl_lock);
1066 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1068 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1070 struct nfs4_call_sync_data *data = calldata;
1071 nfs4_setup_sequence(data->seq_server->nfs_client,
1072 data->seq_args, data->seq_res, task);
1075 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1077 struct nfs4_call_sync_data *data = calldata;
1078 nfs4_sequence_done(task, data->seq_res);
1081 static const struct rpc_call_ops nfs40_call_sync_ops = {
1082 .rpc_call_prepare = nfs40_call_sync_prepare,
1083 .rpc_call_done = nfs40_call_sync_done,
1086 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1089 struct rpc_task *task;
1091 task = rpc_run_task(task_setup);
1093 return PTR_ERR(task);
1095 ret = task->tk_status;
1100 static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1101 struct nfs_server *server,
1102 struct rpc_message *msg,
1103 struct nfs4_sequence_args *args,
1104 struct nfs4_sequence_res *res,
1105 unsigned short task_flags)
1107 struct nfs_client *clp = server->nfs_client;
1108 struct nfs4_call_sync_data data = {
1109 .seq_server = server,
1113 struct rpc_task_setup task_setup = {
1116 .callback_ops = clp->cl_mvops->call_sync_ops,
1117 .callback_data = &data,
1118 .flags = task_flags,
1121 return nfs4_call_sync_custom(&task_setup);
1124 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1125 struct nfs_server *server,
1126 struct rpc_message *msg,
1127 struct nfs4_sequence_args *args,
1128 struct nfs4_sequence_res *res)
1130 return nfs4_do_call_sync(clnt, server, msg, args, res, 0);
1134 int nfs4_call_sync(struct rpc_clnt *clnt,
1135 struct nfs_server *server,
1136 struct rpc_message *msg,
1137 struct nfs4_sequence_args *args,
1138 struct nfs4_sequence_res *res,
1141 nfs4_init_sequence(args, res, cache_reply, 0);
1142 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1146 nfs4_inc_nlink_locked(struct inode *inode)
1148 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1153 nfs4_dec_nlink_locked(struct inode *inode)
1155 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1160 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo,
1161 unsigned long timestamp, unsigned long cache_validity)
1163 struct nfs_inode *nfsi = NFS_I(dir);
1165 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1166 | NFS_INO_INVALID_MTIME
1167 | NFS_INO_INVALID_DATA
1169 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
1170 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1171 nfsi->attrtimeo_timestamp = jiffies;
1173 nfs_force_lookup_revalidate(dir);
1174 if (cinfo->before != inode_peek_iversion_raw(dir))
1175 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1176 NFS_INO_INVALID_ACL;
1178 inode_set_iversion_raw(dir, cinfo->after);
1179 nfsi->read_cache_jiffies = timestamp;
1180 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1181 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1182 nfs_fscache_invalidate(dir);
1186 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1187 unsigned long timestamp, unsigned long cache_validity)
1189 spin_lock(&dir->i_lock);
1190 update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
1191 spin_unlock(&dir->i_lock);
1194 struct nfs4_open_createattrs {
1195 struct nfs4_label *label;
1196 struct iattr *sattr;
1197 const __u32 verf[2];
1200 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1201 int err, struct nfs4_exception *exception)
1205 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1207 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1208 exception->retry = 1;
1212 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1214 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1217 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1219 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1221 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1225 nfs4_map_atomic_open_share(struct nfs_server *server,
1226 fmode_t fmode, int openflags)
1230 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1232 res = NFS4_SHARE_ACCESS_READ;
1235 res = NFS4_SHARE_ACCESS_WRITE;
1237 case FMODE_READ|FMODE_WRITE:
1238 res = NFS4_SHARE_ACCESS_BOTH;
1240 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1242 /* Want no delegation if we're using O_DIRECT */
1243 if (openflags & O_DIRECT)
1244 res |= NFS4_SHARE_WANT_NO_DELEG;
1249 static enum open_claim_type4
1250 nfs4_map_atomic_open_claim(struct nfs_server *server,
1251 enum open_claim_type4 claim)
1253 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1258 case NFS4_OPEN_CLAIM_FH:
1259 return NFS4_OPEN_CLAIM_NULL;
1260 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1261 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1262 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1263 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1267 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1269 p->o_res.f_attr = &p->f_attr;
1270 p->o_res.f_label = p->f_label;
1271 p->o_res.seqid = p->o_arg.seqid;
1272 p->c_res.seqid = p->c_arg.seqid;
1273 p->o_res.server = p->o_arg.server;
1274 p->o_res.access_request = p->o_arg.access;
1275 nfs_fattr_init(&p->f_attr);
1276 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1279 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1280 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1281 const struct nfs4_open_createattrs *c,
1282 enum open_claim_type4 claim,
1285 struct dentry *parent = dget_parent(dentry);
1286 struct inode *dir = d_inode(parent);
1287 struct nfs_server *server = NFS_SERVER(dir);
1288 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1289 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1290 struct nfs4_opendata *p;
1292 p = kzalloc(sizeof(*p), gfp_mask);
1296 p->f_label = nfs4_label_alloc(server, gfp_mask);
1297 if (IS_ERR(p->f_label))
1300 p->a_label = nfs4_label_alloc(server, gfp_mask);
1301 if (IS_ERR(p->a_label))
1304 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1305 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1306 if (IS_ERR(p->o_arg.seqid))
1307 goto err_free_label;
1308 nfs_sb_active(dentry->d_sb);
1309 p->dentry = dget(dentry);
1312 atomic_inc(&sp->so_count);
1313 p->o_arg.open_flags = flags;
1314 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1315 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1316 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1318 if (flags & O_CREAT) {
1319 p->o_arg.umask = current_umask();
1320 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1321 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1322 p->o_arg.u.attrs = &p->attrs;
1323 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1325 memcpy(p->o_arg.u.verifier.data, c->verf,
1326 sizeof(p->o_arg.u.verifier.data));
1329 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1330 * will return permission denied for all bits until close */
1331 if (!(flags & O_EXCL)) {
1332 /* ask server to check for all possible rights as results
1334 switch (p->o_arg.claim) {
1337 case NFS4_OPEN_CLAIM_NULL:
1338 case NFS4_OPEN_CLAIM_FH:
1339 p->o_arg.access = NFS4_ACCESS_READ |
1340 NFS4_ACCESS_MODIFY |
1341 NFS4_ACCESS_EXTEND |
1342 NFS4_ACCESS_EXECUTE;
1345 p->o_arg.clientid = server->nfs_client->cl_clientid;
1346 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1347 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1348 p->o_arg.name = &dentry->d_name;
1349 p->o_arg.server = server;
1350 p->o_arg.bitmask = nfs4_bitmask(server, label);
1351 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1352 switch (p->o_arg.claim) {
1353 case NFS4_OPEN_CLAIM_NULL:
1354 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1355 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1356 p->o_arg.fh = NFS_FH(dir);
1358 case NFS4_OPEN_CLAIM_PREVIOUS:
1359 case NFS4_OPEN_CLAIM_FH:
1360 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1361 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1362 p->o_arg.fh = NFS_FH(d_inode(dentry));
1364 p->c_arg.fh = &p->o_res.fh;
1365 p->c_arg.stateid = &p->o_res.stateid;
1366 p->c_arg.seqid = p->o_arg.seqid;
1367 nfs4_init_opendata_res(p);
1368 kref_init(&p->kref);
1372 nfs4_label_free(p->a_label);
1374 nfs4_label_free(p->f_label);
1382 static void nfs4_opendata_free(struct kref *kref)
1384 struct nfs4_opendata *p = container_of(kref,
1385 struct nfs4_opendata, kref);
1386 struct super_block *sb = p->dentry->d_sb;
1388 nfs4_lgopen_release(p->lgp);
1389 nfs_free_seqid(p->o_arg.seqid);
1390 nfs4_sequence_free_slot(&p->o_res.seq_res);
1391 if (p->state != NULL)
1392 nfs4_put_open_state(p->state);
1393 nfs4_put_state_owner(p->owner);
1395 nfs4_label_free(p->a_label);
1396 nfs4_label_free(p->f_label);
1400 nfs_sb_deactive(sb);
1401 nfs_fattr_free_names(&p->f_attr);
1402 kfree(p->f_attr.mdsthreshold);
1406 static void nfs4_opendata_put(struct nfs4_opendata *p)
1409 kref_put(&p->kref, nfs4_opendata_free);
1412 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1415 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1416 case FMODE_READ|FMODE_WRITE:
1417 return state->n_rdwr != 0;
1419 return state->n_wronly != 0;
1421 return state->n_rdonly != 0;
1427 static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1428 int open_mode, enum open_claim_type4 claim)
1432 if (open_mode & (O_EXCL|O_TRUNC))
1435 case NFS4_OPEN_CLAIM_NULL:
1436 case NFS4_OPEN_CLAIM_FH:
1441 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1443 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1444 && state->n_rdonly != 0;
1447 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1448 && state->n_wronly != 0;
1450 case FMODE_READ|FMODE_WRITE:
1451 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1452 && state->n_rdwr != 0;
1458 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1459 enum open_claim_type4 claim)
1461 if (delegation == NULL)
1463 if ((delegation->type & fmode) != fmode)
1466 case NFS4_OPEN_CLAIM_NULL:
1467 case NFS4_OPEN_CLAIM_FH:
1469 case NFS4_OPEN_CLAIM_PREVIOUS:
1470 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1476 nfs_mark_delegation_referenced(delegation);
1480 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1489 case FMODE_READ|FMODE_WRITE:
1492 nfs4_state_set_mode_locked(state, state->state | fmode);
1495 #ifdef CONFIG_NFS_V4_1
1496 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1498 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1500 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1502 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1506 #endif /* CONFIG_NFS_V4_1 */
1508 static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1510 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1511 wake_up_all(&state->waitq);
1514 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1515 const nfs4_stateid *stateid)
1517 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1518 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1520 if (stateid_seqid == state_seqid + 1U ||
1521 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1522 nfs_state_log_update_open_stateid(state);
1524 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1527 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1529 struct nfs_client *clp = state->owner->so_server->nfs_client;
1530 bool need_recover = false;
1532 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1533 need_recover = true;
1534 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1535 need_recover = true;
1536 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1537 need_recover = true;
1539 nfs4_state_mark_reclaim_nograce(clp, state);
1543 * Check for whether or not the caller may update the open stateid
1544 * to the value passed in by stateid.
1546 * Note: This function relies heavily on the server implementing
1547 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1549 * i.e. The stateid seqids have to be initialised to 1, and
1550 * are then incremented on every state transition.
1552 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1553 const nfs4_stateid *stateid)
1555 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1556 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1557 if (stateid->seqid == cpu_to_be32(1))
1558 nfs_state_log_update_open_stateid(state);
1560 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1564 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1565 nfs_state_log_out_of_order_open_stateid(state, stateid);
1571 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1573 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1575 if (state->n_wronly)
1576 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1577 if (state->n_rdonly)
1578 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1580 set_bit(NFS_O_RDWR_STATE, &state->flags);
1581 set_bit(NFS_OPEN_STATE, &state->flags);
1584 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1585 nfs4_stateid *stateid, fmode_t fmode)
1587 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1588 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1590 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1593 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1596 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1597 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1598 clear_bit(NFS_OPEN_STATE, &state->flags);
1600 if (stateid == NULL)
1602 /* Handle OPEN+OPEN_DOWNGRADE races */
1603 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1604 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1605 nfs_resync_open_stateid_locked(state);
1608 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1609 nfs4_stateid_copy(&state->stateid, stateid);
1610 nfs4_stateid_copy(&state->open_stateid, stateid);
1611 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1613 nfs_state_log_update_open_stateid(state);
1616 static void nfs_clear_open_stateid(struct nfs4_state *state,
1617 nfs4_stateid *arg_stateid,
1618 nfs4_stateid *stateid, fmode_t fmode)
1620 write_seqlock(&state->seqlock);
1621 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1622 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1623 nfs_clear_open_stateid_locked(state, stateid, fmode);
1624 write_sequnlock(&state->seqlock);
1625 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1626 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1629 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1630 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1631 __must_hold(&state->owner->so_lock)
1632 __must_hold(&state->seqlock)
1640 if (!nfs_need_update_open_stateid(state, stateid))
1642 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1646 /* Rely on seqids for serialisation with NFSv4.0 */
1647 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1650 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1652 * Ensure we process the state changes in the same order
1653 * in which the server processed them by delaying the
1654 * update of the stateid until we are in sequence.
1656 write_sequnlock(&state->seqlock);
1657 spin_unlock(&state->owner->so_lock);
1659 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1660 if (!signal_pending(current)) {
1661 if (schedule_timeout(5*HZ) == 0)
1667 finish_wait(&state->waitq, &wait);
1669 spin_lock(&state->owner->so_lock);
1670 write_seqlock(&state->seqlock);
1673 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1674 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1675 nfs4_stateid_copy(freeme, &state->open_stateid);
1676 nfs_test_and_clear_all_open_stateid(state);
1679 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1680 nfs4_stateid_copy(&state->stateid, stateid);
1681 nfs4_stateid_copy(&state->open_stateid, stateid);
1682 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1683 nfs_state_log_update_open_stateid(state);
1686 static void nfs_state_set_open_stateid(struct nfs4_state *state,
1687 const nfs4_stateid *open_stateid,
1689 nfs4_stateid *freeme)
1692 * Protect the call to nfs4_state_set_mode_locked and
1693 * serialise the stateid update
1695 write_seqlock(&state->seqlock);
1696 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1699 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1702 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1704 case FMODE_READ|FMODE_WRITE:
1705 set_bit(NFS_O_RDWR_STATE, &state->flags);
1707 set_bit(NFS_OPEN_STATE, &state->flags);
1708 write_sequnlock(&state->seqlock);
1711 static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1713 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1714 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1715 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1716 clear_bit(NFS_OPEN_STATE, &state->flags);
1719 static void nfs_state_set_delegation(struct nfs4_state *state,
1720 const nfs4_stateid *deleg_stateid,
1724 * Protect the call to nfs4_state_set_mode_locked and
1725 * serialise the stateid update
1727 write_seqlock(&state->seqlock);
1728 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1729 set_bit(NFS_DELEGATED_STATE, &state->flags);
1730 write_sequnlock(&state->seqlock);
1733 static void nfs_state_clear_delegation(struct nfs4_state *state)
1735 write_seqlock(&state->seqlock);
1736 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1737 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1738 write_sequnlock(&state->seqlock);
1741 int update_open_stateid(struct nfs4_state *state,
1742 const nfs4_stateid *open_stateid,
1743 const nfs4_stateid *delegation,
1746 struct nfs_server *server = NFS_SERVER(state->inode);
1747 struct nfs_client *clp = server->nfs_client;
1748 struct nfs_inode *nfsi = NFS_I(state->inode);
1749 struct nfs_delegation *deleg_cur;
1750 nfs4_stateid freeme = { };
1753 fmode &= (FMODE_READ|FMODE_WRITE);
1756 spin_lock(&state->owner->so_lock);
1757 if (open_stateid != NULL) {
1758 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1762 deleg_cur = nfs4_get_valid_delegation(state->inode);
1763 if (deleg_cur == NULL)
1766 spin_lock(&deleg_cur->lock);
1767 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1768 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1769 (deleg_cur->type & fmode) != fmode)
1770 goto no_delegation_unlock;
1772 if (delegation == NULL)
1773 delegation = &deleg_cur->stateid;
1774 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
1775 goto no_delegation_unlock;
1777 nfs_mark_delegation_referenced(deleg_cur);
1778 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1780 no_delegation_unlock:
1781 spin_unlock(&deleg_cur->lock);
1784 update_open_stateflags(state, fmode);
1785 spin_unlock(&state->owner->so_lock);
1788 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1789 nfs4_schedule_state_manager(clp);
1790 if (freeme.type != 0)
1791 nfs4_test_and_free_stateid(server, &freeme,
1792 state->owner->so_cred);
1797 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1798 const nfs4_stateid *stateid)
1800 struct nfs4_state *state = lsp->ls_state;
1803 spin_lock(&state->state_lock);
1804 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1806 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1808 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1811 spin_unlock(&state->state_lock);
1815 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1817 struct nfs_delegation *delegation;
1819 fmode &= FMODE_READ|FMODE_WRITE;
1821 delegation = nfs4_get_valid_delegation(inode);
1822 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1827 nfs4_inode_return_delegation(inode);
1830 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1832 struct nfs4_state *state = opendata->state;
1833 struct nfs_delegation *delegation;
1834 int open_mode = opendata->o_arg.open_flags;
1835 fmode_t fmode = opendata->o_arg.fmode;
1836 enum open_claim_type4 claim = opendata->o_arg.claim;
1837 nfs4_stateid stateid;
1841 spin_lock(&state->owner->so_lock);
1842 if (can_open_cached(state, fmode, open_mode, claim)) {
1843 update_open_stateflags(state, fmode);
1844 spin_unlock(&state->owner->so_lock);
1845 goto out_return_state;
1847 spin_unlock(&state->owner->so_lock);
1849 delegation = nfs4_get_valid_delegation(state->inode);
1850 if (!can_open_delegated(delegation, fmode, claim)) {
1854 /* Save the delegation */
1855 nfs4_stateid_copy(&stateid, &delegation->stateid);
1857 nfs_release_seqid(opendata->o_arg.seqid);
1858 if (!opendata->is_recover) {
1859 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1865 /* Try to update the stateid using the delegation */
1866 if (update_open_stateid(state, NULL, &stateid, fmode))
1867 goto out_return_state;
1870 return ERR_PTR(ret);
1872 refcount_inc(&state->count);
1877 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1879 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1880 struct nfs_delegation *delegation;
1881 int delegation_flags = 0;
1884 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1886 delegation_flags = delegation->flags;
1888 switch (data->o_arg.claim) {
1891 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1892 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1893 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1894 "returning a delegation for "
1895 "OPEN(CLAIM_DELEGATE_CUR)\n",
1899 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1900 nfs_inode_set_delegation(state->inode,
1901 data->owner->so_cred,
1902 data->o_res.delegation_type,
1903 &data->o_res.delegation,
1904 data->o_res.pagemod_limit);
1906 nfs_inode_reclaim_delegation(state->inode,
1907 data->owner->so_cred,
1908 data->o_res.delegation_type,
1909 &data->o_res.delegation,
1910 data->o_res.pagemod_limit);
1912 if (data->o_res.do_recall)
1913 nfs_async_inode_return_delegation(state->inode,
1914 &data->o_res.delegation);
1918 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1919 * and update the nfs4_state.
1921 static struct nfs4_state *
1922 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1924 struct inode *inode = data->state->inode;
1925 struct nfs4_state *state = data->state;
1928 if (!data->rpc_done) {
1929 if (data->rpc_status)
1930 return ERR_PTR(data->rpc_status);
1931 /* cached opens have already been processed */
1935 ret = nfs_refresh_inode(inode, &data->f_attr);
1937 return ERR_PTR(ret);
1939 if (data->o_res.delegation_type != 0)
1940 nfs4_opendata_check_deleg(data, state);
1942 if (!update_open_stateid(state, &data->o_res.stateid,
1943 NULL, data->o_arg.fmode))
1944 return ERR_PTR(-EAGAIN);
1945 refcount_inc(&state->count);
1950 static struct inode *
1951 nfs4_opendata_get_inode(struct nfs4_opendata *data)
1953 struct inode *inode;
1955 switch (data->o_arg.claim) {
1956 case NFS4_OPEN_CLAIM_NULL:
1957 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1958 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1959 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1960 return ERR_PTR(-EAGAIN);
1961 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1962 &data->f_attr, data->f_label);
1965 inode = d_inode(data->dentry);
1967 nfs_refresh_inode(inode, &data->f_attr);
1972 static struct nfs4_state *
1973 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
1975 struct nfs4_state *state;
1976 struct inode *inode;
1978 inode = nfs4_opendata_get_inode(data);
1980 return ERR_CAST(inode);
1981 if (data->state != NULL && data->state->inode == inode) {
1982 state = data->state;
1983 refcount_inc(&state->count);
1985 state = nfs4_get_open_state(inode, data->owner);
1988 state = ERR_PTR(-ENOMEM);
1992 static struct nfs4_state *
1993 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1995 struct nfs4_state *state;
1997 if (!data->rpc_done) {
1998 state = nfs4_try_open_cached(data);
1999 trace_nfs4_cached_open(data->state);
2003 state = nfs4_opendata_find_nfs4_state(data);
2007 if (data->o_res.delegation_type != 0)
2008 nfs4_opendata_check_deleg(data, state);
2009 if (!update_open_stateid(state, &data->o_res.stateid,
2010 NULL, data->o_arg.fmode)) {
2011 nfs4_put_open_state(state);
2012 state = ERR_PTR(-EAGAIN);
2015 nfs_release_seqid(data->o_arg.seqid);
2019 static struct nfs4_state *
2020 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2022 struct nfs4_state *ret;
2024 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2025 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2027 ret = _nfs4_opendata_to_nfs4_state(data);
2028 nfs4_sequence_free_slot(&data->o_res.seq_res);
2032 static struct nfs_open_context *
2033 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
2035 struct nfs_inode *nfsi = NFS_I(state->inode);
2036 struct nfs_open_context *ctx;
2039 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
2040 if (ctx->state != state)
2042 if ((ctx->mode & mode) != mode)
2044 if (!get_nfs_open_context(ctx))
2050 return ERR_PTR(-ENOENT);
2053 static struct nfs_open_context *
2054 nfs4_state_find_open_context(struct nfs4_state *state)
2056 struct nfs_open_context *ctx;
2058 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2061 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2064 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2067 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2068 struct nfs4_state *state, enum open_claim_type4 claim)
2070 struct nfs4_opendata *opendata;
2072 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
2073 NULL, claim, GFP_NOFS);
2074 if (opendata == NULL)
2075 return ERR_PTR(-ENOMEM);
2076 opendata->state = state;
2077 refcount_inc(&state->count);
2081 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2084 struct nfs4_state *newstate;
2087 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
2089 opendata->o_arg.open_flags = 0;
2090 opendata->o_arg.fmode = fmode;
2091 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2092 NFS_SB(opendata->dentry->d_sb),
2094 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2095 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2096 nfs4_init_opendata_res(opendata);
2097 ret = _nfs4_recover_proc_open(opendata);
2100 newstate = nfs4_opendata_to_nfs4_state(opendata);
2101 if (IS_ERR(newstate))
2102 return PTR_ERR(newstate);
2103 if (newstate != opendata->state)
2105 nfs4_close_state(newstate, fmode);
2109 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2113 /* memory barrier prior to reading state->n_* */
2115 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2118 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2121 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2125 * We may have performed cached opens for all three recoveries.
2126 * Check if we need to update the current stateid.
2128 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
2129 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
2130 write_seqlock(&state->seqlock);
2131 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2132 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2133 write_sequnlock(&state->seqlock);
2140 * reclaim state on the server after a reboot.
2142 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2144 struct nfs_delegation *delegation;
2145 struct nfs4_opendata *opendata;
2146 fmode_t delegation_type = 0;
2149 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2150 NFS4_OPEN_CLAIM_PREVIOUS);
2151 if (IS_ERR(opendata))
2152 return PTR_ERR(opendata);
2154 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2155 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
2156 delegation_type = delegation->type;
2158 opendata->o_arg.u.delegation_type = delegation_type;
2159 status = nfs4_open_recover(opendata, state);
2160 nfs4_opendata_put(opendata);
2164 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2166 struct nfs_server *server = NFS_SERVER(state->inode);
2167 struct nfs4_exception exception = { };
2170 err = _nfs4_do_open_reclaim(ctx, state);
2171 trace_nfs4_open_reclaim(ctx, 0, err);
2172 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2174 if (err != -NFS4ERR_DELAY)
2176 nfs4_handle_exception(server, err, &exception);
2177 } while (exception.retry);
2181 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2183 struct nfs_open_context *ctx;
2186 ctx = nfs4_state_find_open_context(state);
2189 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2190 nfs_state_clear_open_state_flags(state);
2191 ret = nfs4_do_open_reclaim(ctx, state);
2192 put_nfs_open_context(ctx);
2196 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
2200 printk(KERN_ERR "NFS: %s: unhandled error "
2201 "%d.\n", __func__, err);
2208 case -NFS4ERR_BADSESSION:
2209 case -NFS4ERR_BADSLOT:
2210 case -NFS4ERR_BAD_HIGH_SLOT:
2211 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2212 case -NFS4ERR_DEADSESSION:
2214 case -NFS4ERR_STALE_CLIENTID:
2215 case -NFS4ERR_STALE_STATEID:
2216 /* Don't recall a delegation if it was lost */
2217 nfs4_schedule_lease_recovery(server->nfs_client);
2219 case -NFS4ERR_MOVED:
2220 nfs4_schedule_migration_recovery(server);
2222 case -NFS4ERR_LEASE_MOVED:
2223 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2225 case -NFS4ERR_DELEG_REVOKED:
2226 case -NFS4ERR_ADMIN_REVOKED:
2227 case -NFS4ERR_EXPIRED:
2228 case -NFS4ERR_BAD_STATEID:
2229 case -NFS4ERR_OPENMODE:
2230 nfs_inode_find_state_and_recover(state->inode,
2232 nfs4_schedule_stateid_recovery(server, state);
2234 case -NFS4ERR_DELAY:
2235 case -NFS4ERR_GRACE:
2239 case -NFS4ERR_DENIED:
2241 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2243 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2250 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2251 struct nfs4_state *state, const nfs4_stateid *stateid)
2253 struct nfs_server *server = NFS_SERVER(state->inode);
2254 struct nfs4_opendata *opendata;
2257 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2258 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2259 if (IS_ERR(opendata))
2260 return PTR_ERR(opendata);
2261 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2262 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
2263 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2267 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
2268 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2272 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
2273 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2277 nfs_state_clear_delegation(state);
2279 nfs4_opendata_put(opendata);
2280 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2283 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2285 struct nfs4_opendata *data = calldata;
2287 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2288 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2291 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2293 struct nfs4_opendata *data = calldata;
2295 nfs40_sequence_done(task, &data->c_res.seq_res);
2297 data->rpc_status = task->tk_status;
2298 if (data->rpc_status == 0) {
2299 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2300 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2301 renew_lease(data->o_res.server, data->timestamp);
2302 data->rpc_done = true;
2306 static void nfs4_open_confirm_release(void *calldata)
2308 struct nfs4_opendata *data = calldata;
2309 struct nfs4_state *state = NULL;
2311 /* If this request hasn't been cancelled, do nothing */
2312 if (!data->cancelled)
2314 /* In case of error, no cleanup! */
2315 if (!data->rpc_done)
2317 state = nfs4_opendata_to_nfs4_state(data);
2319 nfs4_close_state(state, data->o_arg.fmode);
2321 nfs4_opendata_put(data);
2324 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2325 .rpc_call_prepare = nfs4_open_confirm_prepare,
2326 .rpc_call_done = nfs4_open_confirm_done,
2327 .rpc_release = nfs4_open_confirm_release,
2331 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2333 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2335 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2336 struct rpc_task *task;
2337 struct rpc_message msg = {
2338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2339 .rpc_argp = &data->c_arg,
2340 .rpc_resp = &data->c_res,
2341 .rpc_cred = data->owner->so_cred,
2343 struct rpc_task_setup task_setup_data = {
2344 .rpc_client = server->client,
2345 .rpc_message = &msg,
2346 .callback_ops = &nfs4_open_confirm_ops,
2347 .callback_data = data,
2348 .workqueue = nfsiod_workqueue,
2349 .flags = RPC_TASK_ASYNC,
2353 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2355 kref_get(&data->kref);
2356 data->rpc_done = false;
2357 data->rpc_status = 0;
2358 data->timestamp = jiffies;
2359 task = rpc_run_task(&task_setup_data);
2361 return PTR_ERR(task);
2362 status = rpc_wait_for_completion_task(task);
2364 data->cancelled = true;
2367 status = data->rpc_status;
2372 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2374 struct nfs4_opendata *data = calldata;
2375 struct nfs4_state_owner *sp = data->owner;
2376 struct nfs_client *clp = sp->so_server->nfs_client;
2377 enum open_claim_type4 claim = data->o_arg.claim;
2379 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2382 * Check if we still need to send an OPEN call, or if we can use
2383 * a delegation instead.
2385 if (data->state != NULL) {
2386 struct nfs_delegation *delegation;
2388 if (can_open_cached(data->state, data->o_arg.fmode,
2389 data->o_arg.open_flags, claim))
2392 delegation = nfs4_get_valid_delegation(data->state->inode);
2393 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2394 goto unlock_no_action;
2397 /* Update client id. */
2398 data->o_arg.clientid = clp->cl_clientid;
2402 case NFS4_OPEN_CLAIM_PREVIOUS:
2403 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2404 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2405 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2407 case NFS4_OPEN_CLAIM_FH:
2408 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2410 data->timestamp = jiffies;
2411 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2412 &data->o_arg.seq_args,
2413 &data->o_res.seq_res,
2415 nfs_release_seqid(data->o_arg.seqid);
2417 /* Set the create mode (note dependency on the session type) */
2418 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2419 if (data->o_arg.open_flags & O_EXCL) {
2420 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2421 if (nfs4_has_persistent_session(clp))
2422 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2423 else if (clp->cl_mvops->minor_version > 0)
2424 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2428 trace_nfs4_cached_open(data->state);
2431 task->tk_action = NULL;
2433 nfs4_sequence_done(task, &data->o_res.seq_res);
2436 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2438 struct nfs4_opendata *data = calldata;
2440 data->rpc_status = task->tk_status;
2442 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2445 if (task->tk_status == 0) {
2446 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2447 switch (data->o_res.f_attr->mode & S_IFMT) {
2451 data->rpc_status = -ELOOP;
2454 data->rpc_status = -EISDIR;
2457 data->rpc_status = -ENOTDIR;
2460 renew_lease(data->o_res.server, data->timestamp);
2461 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2462 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2464 data->rpc_done = true;
2467 static void nfs4_open_release(void *calldata)
2469 struct nfs4_opendata *data = calldata;
2470 struct nfs4_state *state = NULL;
2472 /* If this request hasn't been cancelled, do nothing */
2473 if (!data->cancelled)
2475 /* In case of error, no cleanup! */
2476 if (data->rpc_status != 0 || !data->rpc_done)
2478 /* In case we need an open_confirm, no cleanup! */
2479 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2481 state = nfs4_opendata_to_nfs4_state(data);
2483 nfs4_close_state(state, data->o_arg.fmode);
2485 nfs4_opendata_put(data);
2488 static const struct rpc_call_ops nfs4_open_ops = {
2489 .rpc_call_prepare = nfs4_open_prepare,
2490 .rpc_call_done = nfs4_open_done,
2491 .rpc_release = nfs4_open_release,
2494 static int nfs4_run_open_task(struct nfs4_opendata *data,
2495 struct nfs_open_context *ctx)
2497 struct inode *dir = d_inode(data->dir);
2498 struct nfs_server *server = NFS_SERVER(dir);
2499 struct nfs_openargs *o_arg = &data->o_arg;
2500 struct nfs_openres *o_res = &data->o_res;
2501 struct rpc_task *task;
2502 struct rpc_message msg = {
2503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2506 .rpc_cred = data->owner->so_cred,
2508 struct rpc_task_setup task_setup_data = {
2509 .rpc_client = server->client,
2510 .rpc_message = &msg,
2511 .callback_ops = &nfs4_open_ops,
2512 .callback_data = data,
2513 .workqueue = nfsiod_workqueue,
2514 .flags = RPC_TASK_ASYNC,
2518 kref_get(&data->kref);
2519 data->rpc_done = false;
2520 data->rpc_status = 0;
2521 data->cancelled = false;
2522 data->is_recover = false;
2524 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
2525 data->is_recover = true;
2526 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2528 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2529 pnfs_lgopen_prepare(data, ctx);
2531 task = rpc_run_task(&task_setup_data);
2533 return PTR_ERR(task);
2534 status = rpc_wait_for_completion_task(task);
2536 data->cancelled = true;
2539 status = data->rpc_status;
2545 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2547 struct inode *dir = d_inode(data->dir);
2548 struct nfs_openres *o_res = &data->o_res;
2551 status = nfs4_run_open_task(data, NULL);
2552 if (status != 0 || !data->rpc_done)
2555 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2557 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2558 status = _nfs4_proc_open_confirm(data);
2564 * Additional permission checks in order to distinguish between an
2565 * open for read, and an open for execute. This works around the
2566 * fact that NFSv4 OPEN treats read and execute permissions as being
2568 * Note that in the non-execute case, we want to turn off permission
2569 * checking if we just created a new file (POSIX open() semantics).
2571 static int nfs4_opendata_access(const struct cred *cred,
2572 struct nfs4_opendata *opendata,
2573 struct nfs4_state *state, fmode_t fmode,
2576 struct nfs_access_entry cache;
2579 /* access call failed or for some reason the server doesn't
2580 * support any access modes -- defer access call until later */
2581 if (opendata->o_res.access_supported == 0)
2586 * Use openflags to check for exec, because fmode won't
2587 * always have FMODE_EXEC set when file open for exec.
2589 if (openflags & __FMODE_EXEC) {
2590 /* ONLY check for exec rights */
2591 if (S_ISDIR(state->inode->i_mode))
2592 mask = NFS4_ACCESS_LOOKUP;
2594 mask = NFS4_ACCESS_EXECUTE;
2595 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2596 mask = NFS4_ACCESS_READ;
2599 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2600 nfs_access_add_cache(state->inode, &cache);
2602 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2603 if ((mask & ~cache.mask & flags) == 0)
2610 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2612 static int _nfs4_proc_open(struct nfs4_opendata *data,
2613 struct nfs_open_context *ctx)
2615 struct inode *dir = d_inode(data->dir);
2616 struct nfs_server *server = NFS_SERVER(dir);
2617 struct nfs_openargs *o_arg = &data->o_arg;
2618 struct nfs_openres *o_res = &data->o_res;
2621 status = nfs4_run_open_task(data, ctx);
2622 if (!data->rpc_done)
2625 if (status == -NFS4ERR_BADNAME &&
2626 !(o_arg->open_flags & O_CREAT))
2631 nfs_fattr_map_and_free_names(server, &data->f_attr);
2633 if (o_arg->open_flags & O_CREAT) {
2634 if (o_arg->open_flags & O_EXCL)
2635 data->file_created = true;
2636 else if (o_res->cinfo.before != o_res->cinfo.after)
2637 data->file_created = true;
2638 if (data->file_created ||
2639 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2640 update_changeattr(dir, &o_res->cinfo,
2641 o_res->f_attr->time_start, 0);
2643 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2644 server->caps &= ~NFS_CAP_POSIX_LOCK;
2645 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2646 status = _nfs4_proc_open_confirm(data);
2650 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2651 nfs4_sequence_free_slot(&o_res->seq_res);
2652 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2653 o_res->f_label, NULL);
2660 * reclaim state on the server after a network partition.
2661 * Assumes caller holds the appropriate lock
2663 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2665 struct nfs4_opendata *opendata;
2668 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2669 NFS4_OPEN_CLAIM_FH);
2670 if (IS_ERR(opendata))
2671 return PTR_ERR(opendata);
2672 ret = nfs4_open_recover(opendata, state);
2674 d_drop(ctx->dentry);
2675 nfs4_opendata_put(opendata);
2679 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2681 struct nfs_server *server = NFS_SERVER(state->inode);
2682 struct nfs4_exception exception = { };
2686 err = _nfs4_open_expired(ctx, state);
2687 trace_nfs4_open_expired(ctx, 0, err);
2688 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2693 case -NFS4ERR_GRACE:
2694 case -NFS4ERR_DELAY:
2695 nfs4_handle_exception(server, err, &exception);
2698 } while (exception.retry);
2703 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2705 struct nfs_open_context *ctx;
2708 ctx = nfs4_state_find_open_context(state);
2711 ret = nfs4_do_open_expired(ctx, state);
2712 put_nfs_open_context(ctx);
2716 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2717 const nfs4_stateid *stateid)
2719 nfs_remove_bad_delegation(state->inode, stateid);
2720 nfs_state_clear_delegation(state);
2723 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2725 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2726 nfs_finish_clear_delegation_stateid(state, NULL);
2729 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2731 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2732 nfs40_clear_delegation_stateid(state);
2733 nfs_state_clear_open_state_flags(state);
2734 return nfs4_open_expired(sp, state);
2737 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2738 nfs4_stateid *stateid,
2739 const struct cred *cred)
2741 return -NFS4ERR_BAD_STATEID;
2744 #if defined(CONFIG_NFS_V4_1)
2745 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2746 nfs4_stateid *stateid,
2747 const struct cred *cred)
2751 switch (stateid->type) {
2754 case NFS4_INVALID_STATEID_TYPE:
2755 case NFS4_SPECIAL_STATEID_TYPE:
2756 return -NFS4ERR_BAD_STATEID;
2757 case NFS4_REVOKED_STATEID_TYPE:
2761 status = nfs41_test_stateid(server, stateid, cred);
2763 case -NFS4ERR_EXPIRED:
2764 case -NFS4ERR_ADMIN_REVOKED:
2765 case -NFS4ERR_DELEG_REVOKED:
2771 /* Ack the revoked state to the server */
2772 nfs41_free_stateid(server, stateid, cred, true);
2773 return -NFS4ERR_EXPIRED;
2776 static int nfs41_check_delegation_stateid(struct nfs4_state *state)
2778 struct nfs_server *server = NFS_SERVER(state->inode);
2779 nfs4_stateid stateid;
2780 struct nfs_delegation *delegation;
2781 const struct cred *cred = NULL;
2782 int status, ret = NFS_OK;
2784 /* Get the delegation credential for use by test/free_stateid */
2786 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2787 if (delegation == NULL) {
2789 nfs_state_clear_delegation(state);
2793 nfs4_stateid_copy(&stateid, &delegation->stateid);
2795 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2796 &delegation->flags)) {
2801 if (delegation->cred)
2802 cred = get_cred(delegation->cred);
2804 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2805 trace_nfs4_test_delegation_stateid(state, NULL, status);
2806 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2807 nfs_finish_clear_delegation_stateid(state, &stateid);
2815 static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2819 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2820 nfs4_copy_delegation_stateid(state->inode, state->state,
2822 nfs4_stateid_match_other(&state->stateid, &tmp))
2823 nfs_state_set_delegation(state, &tmp, state->state);
2825 nfs_state_clear_delegation(state);
2829 * nfs41_check_expired_locks - possibly free a lock stateid
2831 * @state: NFSv4 state for an inode
2833 * Returns NFS_OK if recovery for this stateid is now finished.
2834 * Otherwise a negative NFS4ERR value is returned.
2836 static int nfs41_check_expired_locks(struct nfs4_state *state)
2838 int status, ret = NFS_OK;
2839 struct nfs4_lock_state *lsp, *prev = NULL;
2840 struct nfs_server *server = NFS_SERVER(state->inode);
2842 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2845 spin_lock(&state->state_lock);
2846 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2847 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2848 const struct cred *cred = lsp->ls_state->owner->so_cred;
2850 refcount_inc(&lsp->ls_count);
2851 spin_unlock(&state->state_lock);
2853 nfs4_put_lock_state(prev);
2856 status = nfs41_test_and_free_expired_stateid(server,
2859 trace_nfs4_test_lock_stateid(state, lsp, status);
2860 if (status == -NFS4ERR_EXPIRED ||
2861 status == -NFS4ERR_BAD_STATEID) {
2862 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2863 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2864 if (!recover_lost_locks)
2865 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2866 } else if (status != NFS_OK) {
2868 nfs4_put_lock_state(prev);
2871 spin_lock(&state->state_lock);
2874 spin_unlock(&state->state_lock);
2875 nfs4_put_lock_state(prev);
2881 * nfs41_check_open_stateid - possibly free an open stateid
2883 * @state: NFSv4 state for an inode
2885 * Returns NFS_OK if recovery for this stateid is now finished.
2886 * Otherwise a negative NFS4ERR value is returned.
2888 static int nfs41_check_open_stateid(struct nfs4_state *state)
2890 struct nfs_server *server = NFS_SERVER(state->inode);
2891 nfs4_stateid *stateid = &state->open_stateid;
2892 const struct cred *cred = state->owner->so_cred;
2895 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
2896 return -NFS4ERR_BAD_STATEID;
2897 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2898 trace_nfs4_test_open_stateid(state, NULL, status);
2899 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2900 nfs_state_clear_open_state_flags(state);
2901 stateid->type = NFS4_INVALID_STATEID_TYPE;
2904 if (nfs_open_stateid_recover_openmode(state))
2905 return -NFS4ERR_OPENMODE;
2909 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2913 status = nfs41_check_delegation_stateid(state);
2914 if (status != NFS_OK)
2916 nfs41_delegation_recover_stateid(state);
2918 status = nfs41_check_expired_locks(state);
2919 if (status != NFS_OK)
2921 status = nfs41_check_open_stateid(state);
2922 if (status != NFS_OK)
2923 status = nfs4_open_expired(sp, state);
2929 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2930 * fields corresponding to attributes that were used to store the verifier.
2931 * Make sure we clobber those fields in the later setattr call
2933 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2934 struct iattr *sattr, struct nfs4_label **label)
2936 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2941 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2942 attrset[i] = opendata->o_res.attrset[i];
2943 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2944 attrset[i] &= ~bitmask[i];
2947 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2948 sattr->ia_valid : 0;
2950 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2951 if (sattr->ia_valid & ATTR_ATIME_SET)
2952 ret |= ATTR_ATIME_SET;
2957 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2958 if (sattr->ia_valid & ATTR_MTIME_SET)
2959 ret |= ATTR_MTIME_SET;
2964 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
2969 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2970 int flags, struct nfs_open_context *ctx)
2972 struct nfs4_state_owner *sp = opendata->owner;
2973 struct nfs_server *server = sp->so_server;
2974 struct dentry *dentry;
2975 struct nfs4_state *state;
2976 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
2977 struct inode *dir = d_inode(opendata->dir);
2978 unsigned long dir_verifier;
2982 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2983 dir_verifier = nfs_save_change_attribute(dir);
2985 ret = _nfs4_proc_open(opendata, ctx);
2989 state = _nfs4_opendata_to_nfs4_state(opendata);
2990 ret = PTR_ERR(state);
2994 if (server->caps & NFS_CAP_POSIX_LOCK)
2995 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2996 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2997 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2999 dentry = opendata->dentry;
3000 if (d_really_is_negative(dentry)) {
3001 struct dentry *alias;
3003 alias = d_exact_alias(dentry, state->inode);
3005 alias = d_splice_alias(igrab(state->inode), dentry);
3006 /* d_splice_alias() can't fail here - it's a non-directory */
3009 ctx->dentry = dentry = alias;
3013 switch(opendata->o_arg.claim) {
3016 case NFS4_OPEN_CLAIM_NULL:
3017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3019 if (!opendata->rpc_done)
3021 if (opendata->o_res.delegation_type != 0)
3022 dir_verifier = nfs_save_change_attribute(dir);
3023 nfs_set_verifier(dentry, dir_verifier);
3026 /* Parse layoutget results before we check for access */
3027 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3029 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
3034 if (d_inode(dentry) == state->inode) {
3035 nfs_inode_attach_open_context(ctx);
3036 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3037 nfs4_schedule_stateid_recovery(server, state);
3041 if (!opendata->cancelled)
3042 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
3047 * Returns a referenced nfs4_state
3049 static int _nfs4_do_open(struct inode *dir,
3050 struct nfs_open_context *ctx,
3052 const struct nfs4_open_createattrs *c,
3055 struct nfs4_state_owner *sp;
3056 struct nfs4_state *state = NULL;
3057 struct nfs_server *server = NFS_SERVER(dir);
3058 struct nfs4_opendata *opendata;
3059 struct dentry *dentry = ctx->dentry;
3060 const struct cred *cred = ctx->cred;
3061 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
3062 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
3063 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
3064 struct iattr *sattr = c->sattr;
3065 struct nfs4_label *label = c->label;
3066 struct nfs4_label *olabel = NULL;
3069 /* Protect against reboot recovery conflicts */
3071 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3073 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3076 status = nfs4_client_recover_expired_lease(server->nfs_client);
3078 goto err_put_state_owner;
3079 if (d_really_is_positive(dentry))
3080 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
3082 if (d_really_is_positive(dentry))
3083 claim = NFS4_OPEN_CLAIM_FH;
3084 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3085 c, claim, GFP_KERNEL);
3086 if (opendata == NULL)
3087 goto err_put_state_owner;
3090 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3091 if (IS_ERR(olabel)) {
3092 status = PTR_ERR(olabel);
3093 goto err_opendata_put;
3097 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3098 if (!opendata->f_attr.mdsthreshold) {
3099 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3100 if (!opendata->f_attr.mdsthreshold)
3101 goto err_free_label;
3103 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
3105 if (d_really_is_positive(dentry))
3106 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
3108 status = _nfs4_open_and_get_state(opendata, flags, ctx);
3110 goto err_free_label;
3113 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
3114 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
3115 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
3117 * send create attributes which was not set by open
3118 * with an extra setattr.
3120 if (attrs || label) {
3121 unsigned ia_old = sattr->ia_valid;
3123 sattr->ia_valid = attrs;
3124 nfs_fattr_init(opendata->o_res.f_attr);
3125 status = nfs4_do_setattr(state->inode, cred,
3126 opendata->o_res.f_attr, sattr,
3127 ctx, label, olabel);
3129 nfs_setattr_update_inode(state->inode, sattr,
3130 opendata->o_res.f_attr);
3131 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3133 sattr->ia_valid = ia_old;
3136 if (opened && opendata->file_created)
3139 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
3140 *ctx_th = opendata->f_attr.mdsthreshold;
3141 opendata->f_attr.mdsthreshold = NULL;
3144 nfs4_label_free(olabel);
3146 nfs4_opendata_put(opendata);
3147 nfs4_put_state_owner(sp);
3150 nfs4_label_free(olabel);
3152 nfs4_opendata_put(opendata);
3153 err_put_state_owner:
3154 nfs4_put_state_owner(sp);
3160 static struct nfs4_state *nfs4_do_open(struct inode *dir,
3161 struct nfs_open_context *ctx,
3163 struct iattr *sattr,
3164 struct nfs4_label *label,
3167 struct nfs_server *server = NFS_SERVER(dir);
3168 struct nfs4_exception exception = {
3169 .interruptible = true,
3171 struct nfs4_state *res;
3172 struct nfs4_open_createattrs c = {
3176 [0] = (__u32)jiffies,
3177 [1] = (__u32)current->pid,
3183 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3185 trace_nfs4_open_file(ctx, flags, status);
3188 /* NOTE: BAD_SEQID means the server and client disagree about the
3189 * book-keeping w.r.t. state-changing operations
3190 * (OPEN/CLOSE/LOCK/LOCKU...)
3191 * It is actually a sign of a bug on the client or on the server.
3193 * If we receive a BAD_SEQID error in the particular case of
3194 * doing an OPEN, we assume that nfs_increment_open_seqid() will
3195 * have unhashed the old state_owner for us, and that we can
3196 * therefore safely retry using a new one. We should still warn
3197 * the user though...
3199 if (status == -NFS4ERR_BAD_SEQID) {
3200 pr_warn_ratelimited("NFS: v4 server %s "
3201 " returned a bad sequence-id error!\n",
3202 NFS_SERVER(dir)->nfs_client->cl_hostname);
3203 exception.retry = 1;
3207 * BAD_STATEID on OPEN means that the server cancelled our
3208 * state before it received the OPEN_CONFIRM.
3209 * Recover by retrying the request as per the discussion
3210 * on Page 181 of RFC3530.
3212 if (status == -NFS4ERR_BAD_STATEID) {
3213 exception.retry = 1;
3216 if (status == -NFS4ERR_EXPIRED) {
3217 nfs4_schedule_lease_recovery(server->nfs_client);
3218 exception.retry = 1;
3221 if (status == -EAGAIN) {
3222 /* We must have found a delegation */
3223 exception.retry = 1;
3226 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3228 res = ERR_PTR(nfs4_handle_exception(server,
3229 status, &exception));
3230 } while (exception.retry);
3234 static int _nfs4_do_setattr(struct inode *inode,
3235 struct nfs_setattrargs *arg,
3236 struct nfs_setattrres *res,
3237 const struct cred *cred,
3238 struct nfs_open_context *ctx)
3240 struct nfs_server *server = NFS_SERVER(inode);
3241 struct rpc_message msg = {
3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3247 const struct cred *delegation_cred = NULL;
3248 unsigned long timestamp = jiffies;
3252 nfs_fattr_init(res->fattr);
3254 /* Servers should only apply open mode checks for file size changes */
3255 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3259 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
3260 /* Use that stateid */
3261 } else if (ctx != NULL && ctx->state) {
3262 struct nfs_lock_context *l_ctx;
3263 if (!nfs4_valid_open_stateid(ctx->state))
3265 l_ctx = nfs_get_lock_context(ctx);
3267 return PTR_ERR(l_ctx);
3268 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3269 &arg->stateid, &delegation_cred);
3270 nfs_put_lock_context(l_ctx);
3273 else if (status == -EAGAIN)
3277 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3279 if (delegation_cred)
3280 msg.rpc_cred = delegation_cred;
3282 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3284 put_cred(delegation_cred);
3285 if (status == 0 && ctx != NULL)
3286 renew_lease(server, timestamp);
3287 trace_nfs4_setattr(inode, &arg->stateid, status);
3291 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
3292 struct nfs_fattr *fattr, struct iattr *sattr,
3293 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
3294 struct nfs4_label *olabel)
3296 struct nfs_server *server = NFS_SERVER(inode);
3297 __u32 bitmask[NFS4_BITMASK_SZ];
3298 struct nfs4_state *state = ctx ? ctx->state : NULL;
3299 struct nfs_setattrargs arg = {
3300 .fh = NFS_FH(inode),
3306 struct nfs_setattrres res = {
3311 struct nfs4_exception exception = {
3314 .stateid = &arg.stateid,
3319 nfs4_bitmap_copy_adjust_setattr(bitmask,
3320 nfs4_bitmask(server, olabel),
3323 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3325 case -NFS4ERR_OPENMODE:
3326 if (!(sattr->ia_valid & ATTR_SIZE)) {
3327 pr_warn_once("NFSv4: server %s is incorrectly "
3328 "applying open mode checks to "
3329 "a SETATTR that is not "
3330 "changing file size.\n",
3331 server->nfs_client->cl_hostname);
3333 if (state && !(state->state & FMODE_WRITE)) {
3335 if (sattr->ia_valid & ATTR_OPEN)
3340 err = nfs4_handle_exception(server, err, &exception);
3341 } while (exception.retry);
3347 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3349 if (inode == NULL || !nfs_have_layout(inode))
3352 return pnfs_wait_on_layoutreturn(inode, task);
3356 * Update the seqid of an open stateid
3358 static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3359 struct nfs4_state *state)
3366 if (!nfs4_valid_open_stateid(state))
3368 seq = read_seqbegin(&state->seqlock);
3369 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3370 nfs4_stateid_copy(dst, &state->open_stateid);
3371 if (read_seqretry(&state->seqlock, seq))
3375 seqid_open = state->open_stateid.seqid;
3376 if (read_seqretry(&state->seqlock, seq))
3379 dst_seqid = be32_to_cpu(dst->seqid);
3380 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3381 dst->seqid = seqid_open;
3387 * Update the seqid of an open stateid after receiving
3388 * NFS4ERR_OLD_STATEID
3390 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3391 struct nfs4_state *state)
3400 if (!nfs4_valid_open_stateid(state))
3402 seq = read_seqbegin(&state->seqlock);
3403 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3404 if (read_seqretry(&state->seqlock, seq))
3408 seqid_open = state->open_stateid.seqid;
3409 if (read_seqretry(&state->seqlock, seq))
3412 dst_seqid = be32_to_cpu(dst->seqid);
3413 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) >= 0)
3414 dst->seqid = cpu_to_be32(dst_seqid + 1);
3416 dst->seqid = seqid_open;
3424 struct nfs4_closedata {
3425 struct inode *inode;
3426 struct nfs4_state *state;
3427 struct nfs_closeargs arg;
3428 struct nfs_closeres res;
3430 struct nfs4_layoutreturn_args arg;
3431 struct nfs4_layoutreturn_res res;
3432 struct nfs4_xdr_opaque_data ld_private;
3436 struct nfs_fattr fattr;
3437 unsigned long timestamp;
3440 static void nfs4_free_closedata(void *data)
3442 struct nfs4_closedata *calldata = data;
3443 struct nfs4_state_owner *sp = calldata->state->owner;
3444 struct super_block *sb = calldata->state->inode->i_sb;
3446 if (calldata->lr.roc)
3447 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3448 calldata->res.lr_ret);
3449 nfs4_put_open_state(calldata->state);
3450 nfs_free_seqid(calldata->arg.seqid);
3451 nfs4_put_state_owner(sp);
3452 nfs_sb_deactive(sb);
3456 static void nfs4_close_done(struct rpc_task *task, void *data)
3458 struct nfs4_closedata *calldata = data;
3459 struct nfs4_state *state = calldata->state;
3460 struct nfs_server *server = NFS_SERVER(calldata->inode);
3461 nfs4_stateid *res_stateid = NULL;
3462 struct nfs4_exception exception = {
3464 .inode = calldata->inode,
3465 .stateid = &calldata->arg.stateid,
3468 dprintk("%s: begin!\n", __func__);
3469 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3471 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3473 /* Handle Layoutreturn errors */
3474 if (pnfs_roc_done(task, calldata->inode,
3475 &calldata->arg.lr_args,
3476 &calldata->res.lr_res,
3477 &calldata->res.lr_ret) == -EAGAIN)
3480 /* hmm. we are done with the inode, and in the process of freeing
3481 * the state_owner. we keep this around to process errors
3483 switch (task->tk_status) {
3485 res_stateid = &calldata->res.stateid;
3486 renew_lease(server, calldata->timestamp);
3488 case -NFS4ERR_ACCESS:
3489 if (calldata->arg.bitmask != NULL) {
3490 calldata->arg.bitmask = NULL;
3491 calldata->res.fattr = NULL;
3496 case -NFS4ERR_OLD_STATEID:
3497 /* Did we race with OPEN? */
3498 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
3502 case -NFS4ERR_ADMIN_REVOKED:
3503 case -NFS4ERR_STALE_STATEID:
3504 case -NFS4ERR_EXPIRED:
3505 nfs4_free_revoked_stateid(server,
3506 &calldata->arg.stateid,
3507 task->tk_msg.rpc_cred);
3509 case -NFS4ERR_BAD_STATEID:
3510 if (calldata->arg.fmode == 0)
3514 task->tk_status = nfs4_async_handle_exception(task,
3515 server, task->tk_status, &exception);
3516 if (exception.retry)
3519 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3520 res_stateid, calldata->arg.fmode);
3522 task->tk_status = 0;
3523 nfs_release_seqid(calldata->arg.seqid);
3524 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3525 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3528 task->tk_status = 0;
3529 rpc_restart_call_prepare(task);
3533 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3535 struct nfs4_closedata *calldata = data;
3536 struct nfs4_state *state = calldata->state;
3537 struct inode *inode = calldata->inode;
3538 struct pnfs_layout_hdr *lo;
3539 bool is_rdonly, is_wronly, is_rdwr;
3542 dprintk("%s: begin!\n", __func__);
3543 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3546 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3547 spin_lock(&state->owner->so_lock);
3548 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3549 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3550 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3551 /* Calculate the change in open mode */
3552 calldata->arg.fmode = 0;
3553 if (state->n_rdwr == 0) {
3554 if (state->n_rdonly == 0)
3555 call_close |= is_rdonly;
3557 calldata->arg.fmode |= FMODE_READ;
3558 if (state->n_wronly == 0)
3559 call_close |= is_wronly;
3561 calldata->arg.fmode |= FMODE_WRITE;
3562 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3563 call_close |= is_rdwr;
3565 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3567 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3568 if (!nfs4_valid_open_stateid(state))
3570 spin_unlock(&state->owner->so_lock);
3573 /* Note: exit _without_ calling nfs4_close_done */
3577 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3578 nfs_release_seqid(calldata->arg.seqid);
3582 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3583 if (lo && !pnfs_layout_is_valid(lo)) {
3584 calldata->arg.lr_args = NULL;
3585 calldata->res.lr_res = NULL;
3588 if (calldata->arg.fmode == 0)
3589 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3591 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3592 /* Close-to-open cache consistency revalidation */
3593 if (!nfs4_have_delegation(inode, FMODE_READ))
3594 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3596 calldata->arg.bitmask = NULL;
3599 calldata->arg.share_access =
3600 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3601 calldata->arg.fmode, 0);
3603 if (calldata->res.fattr == NULL)
3604 calldata->arg.bitmask = NULL;
3605 else if (calldata->arg.bitmask == NULL)
3606 calldata->res.fattr = NULL;
3607 calldata->timestamp = jiffies;
3608 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3609 &calldata->arg.seq_args,
3610 &calldata->res.seq_res,
3612 nfs_release_seqid(calldata->arg.seqid);
3613 dprintk("%s: done!\n", __func__);
3616 task->tk_action = NULL;
3618 nfs4_sequence_done(task, &calldata->res.seq_res);
3621 static const struct rpc_call_ops nfs4_close_ops = {
3622 .rpc_call_prepare = nfs4_close_prepare,
3623 .rpc_call_done = nfs4_close_done,
3624 .rpc_release = nfs4_free_closedata,
3628 * It is possible for data to be read/written from a mem-mapped file
3629 * after the sys_close call (which hits the vfs layer as a flush).
3630 * This means that we can't safely call nfsv4 close on a file until
3631 * the inode is cleared. This in turn means that we are not good
3632 * NFSv4 citizens - we do not indicate to the server to update the file's
3633 * share state even when we are done with one of the three share
3634 * stateid's in the inode.
3636 * NOTE: Caller must be holding the sp->so_owner semaphore!
3638 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3640 struct nfs_server *server = NFS_SERVER(state->inode);
3641 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3642 struct nfs4_closedata *calldata;
3643 struct nfs4_state_owner *sp = state->owner;
3644 struct rpc_task *task;
3645 struct rpc_message msg = {
3646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3647 .rpc_cred = state->owner->so_cred,
3649 struct rpc_task_setup task_setup_data = {
3650 .rpc_client = server->client,
3651 .rpc_message = &msg,
3652 .callback_ops = &nfs4_close_ops,
3653 .workqueue = nfsiod_workqueue,
3654 .flags = RPC_TASK_ASYNC,
3656 int status = -ENOMEM;
3658 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3659 &task_setup_data.rpc_client, &msg);
3661 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3662 if (calldata == NULL)
3664 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
3665 calldata->inode = state->inode;
3666 calldata->state = state;
3667 calldata->arg.fh = NFS_FH(state->inode);
3668 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3669 goto out_free_calldata;
3670 /* Serialization for the sequence id */
3671 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3672 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3673 if (IS_ERR(calldata->arg.seqid))
3674 goto out_free_calldata;
3675 nfs_fattr_init(&calldata->fattr);
3676 calldata->arg.fmode = 0;
3677 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3678 calldata->res.fattr = &calldata->fattr;
3679 calldata->res.seqid = calldata->arg.seqid;
3680 calldata->res.server = server;
3681 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3682 calldata->lr.roc = pnfs_roc(state->inode,
3683 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3684 if (calldata->lr.roc) {
3685 calldata->arg.lr_args = &calldata->lr.arg;
3686 calldata->res.lr_res = &calldata->lr.res;
3688 nfs_sb_active(calldata->inode->i_sb);
3690 msg.rpc_argp = &calldata->arg;
3691 msg.rpc_resp = &calldata->res;
3692 task_setup_data.callback_data = calldata;
3693 task = rpc_run_task(&task_setup_data);
3695 return PTR_ERR(task);
3698 status = rpc_wait_for_completion_task(task);
3704 nfs4_put_open_state(state);
3705 nfs4_put_state_owner(sp);
3709 static struct inode *
3710 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3711 int open_flags, struct iattr *attr, int *opened)
3713 struct nfs4_state *state;
3714 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3716 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3718 /* Protect against concurrent sillydeletes */
3719 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3721 nfs4_label_release_security(label);
3724 return ERR_CAST(state);
3725 return state->inode;
3728 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3730 if (ctx->state == NULL)
3733 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
3735 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
3738 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3739 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3740 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3742 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3744 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3745 struct nfs4_server_caps_arg args = {
3749 struct nfs4_server_caps_res res = {};
3750 struct rpc_message msg = {
3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3758 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3759 FATTR4_WORD0_FH_EXPIRE_TYPE |
3760 FATTR4_WORD0_LINK_SUPPORT |
3761 FATTR4_WORD0_SYMLINK_SUPPORT |
3762 FATTR4_WORD0_ACLSUPPORT;
3764 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3766 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3768 /* Sanity check the server answers */
3769 switch (minorversion) {
3771 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3772 res.attr_bitmask[2] = 0;
3775 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3778 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3780 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3781 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3782 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3783 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3784 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3785 NFS_CAP_CTIME|NFS_CAP_MTIME|
3786 NFS_CAP_SECURITY_LABEL);
3787 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3788 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3789 server->caps |= NFS_CAP_ACLS;
3790 if (res.has_links != 0)
3791 server->caps |= NFS_CAP_HARDLINKS;
3792 if (res.has_symlinks != 0)
3793 server->caps |= NFS_CAP_SYMLINKS;
3794 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3795 server->caps |= NFS_CAP_FILEID;
3796 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3797 server->caps |= NFS_CAP_MODE;
3798 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3799 server->caps |= NFS_CAP_NLINK;
3800 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3801 server->caps |= NFS_CAP_OWNER;
3802 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3803 server->caps |= NFS_CAP_OWNER_GROUP;
3804 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3805 server->caps |= NFS_CAP_ATIME;
3806 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3807 server->caps |= NFS_CAP_CTIME;
3808 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3809 server->caps |= NFS_CAP_MTIME;
3810 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3811 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3812 server->caps |= NFS_CAP_SECURITY_LABEL;
3814 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3815 sizeof(server->attr_bitmask));
3816 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3818 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3819 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3820 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3821 server->cache_consistency_bitmask[2] = 0;
3823 /* Avoid a regression due to buggy server */
3824 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3825 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3826 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3827 sizeof(server->exclcreat_bitmask));
3829 server->acl_bitmask = res.acl_bitmask;
3830 server->fh_expire_type = res.fh_expire_type;
3836 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3838 struct nfs4_exception exception = {
3839 .interruptible = true,
3843 err = nfs4_handle_exception(server,
3844 _nfs4_server_capabilities(server, fhandle),
3846 } while (exception.retry);
3850 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3851 struct nfs_fsinfo *info)
3854 struct nfs4_lookup_root_arg args = {
3857 struct nfs4_lookup_res res = {
3859 .fattr = info->fattr,
3862 struct rpc_message msg = {
3863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3868 bitmask[0] = nfs4_fattr_bitmap[0];
3869 bitmask[1] = nfs4_fattr_bitmap[1];
3871 * Process the label in the upcoming getfattr
3873 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3875 nfs_fattr_init(info->fattr);
3876 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3879 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3880 struct nfs_fsinfo *info)
3882 struct nfs4_exception exception = {
3883 .interruptible = true,
3887 err = _nfs4_lookup_root(server, fhandle, info);
3888 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3891 case -NFS4ERR_WRONGSEC:
3894 err = nfs4_handle_exception(server, err, &exception);
3896 } while (exception.retry);
3901 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3902 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3904 struct rpc_auth_create_args auth_args = {
3905 .pseudoflavor = flavor,
3907 struct rpc_auth *auth;
3909 auth = rpcauth_create(&auth_args, server->client);
3912 return nfs4_lookup_root(server, fhandle, info);
3916 * Retry pseudoroot lookup with various security flavors. We do this when:
3918 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3919 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3921 * Returns zero on success, or a negative NFS4ERR value, or a
3922 * negative errno value.
3924 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3925 struct nfs_fsinfo *info)
3927 /* Per 3530bis 15.33.5 */
3928 static const rpc_authflavor_t flav_array[] = {
3932 RPC_AUTH_UNIX, /* courtesy */
3935 int status = -EPERM;
3938 if (server->auth_info.flavor_len > 0) {
3939 /* try each flavor specified by user */
3940 for (i = 0; i < server->auth_info.flavor_len; i++) {
3941 status = nfs4_lookup_root_sec(server, fhandle, info,
3942 server->auth_info.flavors[i]);
3943 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3948 /* no flavors specified by user, try default list */
3949 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3950 status = nfs4_lookup_root_sec(server, fhandle, info,
3952 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3959 * -EACCES could mean that the user doesn't have correct permissions
3960 * to access the mount. It could also mean that we tried to mount
3961 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3962 * existing mount programs don't handle -EACCES very well so it should
3963 * be mapped to -EPERM instead.
3965 if (status == -EACCES)
3971 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3972 * @server: initialized nfs_server handle
3973 * @fhandle: we fill in the pseudo-fs root file handle
3974 * @info: we fill in an FSINFO struct
3975 * @auth_probe: probe the auth flavours
3977 * Returns zero on success, or a negative errno.
3979 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3980 struct nfs_fsinfo *info,
3986 status = nfs4_lookup_root(server, fhandle, info);
3988 if (auth_probe || status == NFS4ERR_WRONGSEC)
3989 status = server->nfs_client->cl_mvops->find_root_sec(server,
3993 status = nfs4_server_capabilities(server, fhandle);
3995 status = nfs4_do_fsinfo(server, fhandle, info);
3997 return nfs4_map_errors(status);
4000 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4001 struct nfs_fsinfo *info)
4004 struct nfs_fattr *fattr = info->fattr;
4005 struct nfs4_label *label = fattr->label;
4007 error = nfs4_server_capabilities(server, mntfh);
4009 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4013 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
4015 dprintk("nfs4_get_root: getattr error = %d\n", -error);
4019 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4020 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4021 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4028 * Get locations and (maybe) other attributes of a referral.
4029 * Note that we'll actually follow the referral later when
4030 * we detect fsid mismatch in inode revalidation
4032 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4033 const struct qstr *name, struct nfs_fattr *fattr,
4034 struct nfs_fh *fhandle)
4036 int status = -ENOMEM;
4037 struct page *page = NULL;
4038 struct nfs4_fs_locations *locations = NULL;
4040 page = alloc_page(GFP_KERNEL);
4043 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4044 if (locations == NULL)
4047 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
4052 * If the fsid didn't change, this is a migration event, not a
4053 * referral. Cause us to drop into the exception handler, which
4054 * will kick off migration recovery.
4056 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
4057 dprintk("%s: server did not return a different fsid for"
4058 " a referral at %s\n", __func__, name->name);
4059 status = -NFS4ERR_MOVED;
4062 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4063 nfs_fixup_referral_attributes(&locations->fattr);
4065 /* replace the lookup nfs_fattr with the locations nfs_fattr */
4066 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
4067 memset(fhandle, 0, sizeof(struct nfs_fh));
4075 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4076 struct nfs_fattr *fattr, struct nfs4_label *label,
4077 struct inode *inode)
4079 __u32 bitmask[NFS4_BITMASK_SZ];
4080 struct nfs4_getattr_arg args = {
4084 struct nfs4_getattr_res res = {
4089 struct rpc_message msg = {
4090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4094 unsigned short task_flags = 0;
4096 /* Is this is an attribute revalidation, subject to softreval? */
4097 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4098 task_flags |= RPC_TASK_TIMEOUT;
4100 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
4102 nfs_fattr_init(fattr);
4103 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4104 return nfs4_do_call_sync(server->client, server, &msg,
4105 &args.seq_args, &res.seq_res, task_flags);
4108 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4109 struct nfs_fattr *fattr, struct nfs4_label *label,
4110 struct inode *inode)
4112 struct nfs4_exception exception = {
4113 .interruptible = true,
4117 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
4118 trace_nfs4_getattr(server, fhandle, fattr, err);
4119 err = nfs4_handle_exception(server, err,
4121 } while (exception.retry);
4126 * The file is not closed if it is opened due to the a request to change
4127 * the size of the file. The open call will not be needed once the
4128 * VFS layer lookup-intents are implemented.
4130 * Close is called when the inode is destroyed.
4131 * If we haven't opened the file for O_WRONLY, we
4132 * need to in the size_change case to obtain a stateid.
4135 * Because OPEN is always done by name in nfsv4, it is
4136 * possible that we opened a different file by the same
4137 * name. We can recognize this race condition, but we
4138 * can't do anything about it besides returning an error.
4140 * This will be fixed with VFS changes (lookup-intent).
4143 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4144 struct iattr *sattr)
4146 struct inode *inode = d_inode(dentry);
4147 const struct cred *cred = NULL;
4148 struct nfs_open_context *ctx = NULL;
4149 struct nfs4_label *label = NULL;
4152 if (pnfs_ld_layoutret_on_setattr(inode) &&
4153 sattr->ia_valid & ATTR_SIZE &&
4154 sattr->ia_size < i_size_read(inode))
4155 pnfs_commit_and_return_layout(inode);
4157 nfs_fattr_init(fattr);
4159 /* Deal with open(O_TRUNC) */
4160 if (sattr->ia_valid & ATTR_OPEN)
4161 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
4163 /* Optimization: if the end result is no change, don't RPC */
4164 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
4167 /* Search for an existing open(O_WRITE) file */
4168 if (sattr->ia_valid & ATTR_FILE) {
4170 ctx = nfs_file_open_context(sattr->ia_file);
4175 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4177 return PTR_ERR(label);
4179 /* Return any delegations if we're going to change ACLs */
4180 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
4181 nfs4_inode_make_writeable(inode);
4183 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
4185 nfs_setattr_update_inode(inode, sattr, fattr);
4186 nfs_setsecurity(inode, fattr, label);
4188 nfs4_label_free(label);
4192 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4193 struct dentry *dentry, struct nfs_fh *fhandle,
4194 struct nfs_fattr *fattr, struct nfs4_label *label)
4196 struct nfs_server *server = NFS_SERVER(dir);
4198 struct nfs4_lookup_arg args = {
4199 .bitmask = server->attr_bitmask,
4200 .dir_fh = NFS_FH(dir),
4201 .name = &dentry->d_name,
4203 struct nfs4_lookup_res res = {
4209 struct rpc_message msg = {
4210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4214 unsigned short task_flags = 0;
4216 /* Is this is an attribute revalidation, subject to softreval? */
4217 if (nfs_lookup_is_soft_revalidate(dentry))
4218 task_flags |= RPC_TASK_TIMEOUT;
4220 args.bitmask = nfs4_bitmask(server, label);
4222 nfs_fattr_init(fattr);
4224 dprintk("NFS call lookup %pd2\n", dentry);
4225 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4226 status = nfs4_do_call_sync(clnt, server, &msg,
4227 &args.seq_args, &res.seq_res, task_flags);
4228 dprintk("NFS reply lookup: %d\n", status);
4232 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
4234 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4235 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
4236 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4240 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
4241 struct dentry *dentry, struct nfs_fh *fhandle,
4242 struct nfs_fattr *fattr, struct nfs4_label *label)
4244 struct nfs4_exception exception = {
4245 .interruptible = true,
4247 struct rpc_clnt *client = *clnt;
4248 const struct qstr *name = &dentry->d_name;
4251 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label);
4252 trace_nfs4_lookup(dir, name, err);
4254 case -NFS4ERR_BADNAME:
4257 case -NFS4ERR_MOVED:
4258 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
4259 if (err == -NFS4ERR_MOVED)
4260 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4262 case -NFS4ERR_WRONGSEC:
4264 if (client != *clnt)
4266 client = nfs4_negotiate_security(client, dir, name);
4268 return PTR_ERR(client);
4270 exception.retry = 1;
4273 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4275 } while (exception.retry);
4280 else if (client != *clnt)
4281 rpc_shutdown_client(client);
4286 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
4287 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4288 struct nfs4_label *label)
4291 struct rpc_clnt *client = NFS_CLIENT(dir);
4293 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label);
4294 if (client != NFS_CLIENT(dir)) {
4295 rpc_shutdown_client(client);
4296 nfs_fixup_secinfo_attributes(fattr);
4302 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
4303 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4305 struct rpc_clnt *client = NFS_CLIENT(dir);
4308 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL);
4310 return ERR_PTR(status);
4311 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
4314 static int _nfs4_proc_lookupp(struct inode *inode,
4315 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4316 struct nfs4_label *label)
4318 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4319 struct nfs_server *server = NFS_SERVER(inode);
4321 struct nfs4_lookupp_arg args = {
4322 .bitmask = server->attr_bitmask,
4323 .fh = NFS_FH(inode),
4325 struct nfs4_lookupp_res res = {
4331 struct rpc_message msg = {
4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4337 args.bitmask = nfs4_bitmask(server, label);
4339 nfs_fattr_init(fattr);
4341 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4342 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4344 dprintk("NFS reply lookupp: %d\n", status);
4348 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4349 struct nfs_fattr *fattr, struct nfs4_label *label)
4351 struct nfs4_exception exception = {
4352 .interruptible = true,
4356 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4357 trace_nfs4_lookupp(inode, err);
4358 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4360 } while (exception.retry);
4364 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4366 struct nfs_server *server = NFS_SERVER(inode);
4367 struct nfs4_accessargs args = {
4368 .fh = NFS_FH(inode),
4369 .access = entry->mask,
4371 struct nfs4_accessres res = {
4374 struct rpc_message msg = {
4375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4378 .rpc_cred = entry->cred,
4382 if (!nfs4_have_delegation(inode, FMODE_READ)) {
4383 res.fattr = nfs_alloc_fattr();
4384 if (res.fattr == NULL)
4386 args.bitmask = server->cache_consistency_bitmask;
4388 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4390 nfs_access_set_mask(entry, res.access);
4392 nfs_refresh_inode(inode, res.fattr);
4394 nfs_free_fattr(res.fattr);
4398 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4400 struct nfs4_exception exception = {
4401 .interruptible = true,
4405 err = _nfs4_proc_access(inode, entry);
4406 trace_nfs4_access(inode, err);
4407 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4409 } while (exception.retry);
4414 * TODO: For the time being, we don't try to get any attributes
4415 * along with any of the zero-copy operations READ, READDIR,
4418 * In the case of the first three, we want to put the GETATTR
4419 * after the read-type operation -- this is because it is hard
4420 * to predict the length of a GETATTR response in v4, and thus
4421 * align the READ data correctly. This means that the GETATTR
4422 * may end up partially falling into the page cache, and we should
4423 * shift it into the 'tail' of the xdr_buf before processing.
4424 * To do this efficiently, we need to know the total length
4425 * of data received, which doesn't seem to be available outside
4428 * In the case of WRITE, we also want to put the GETATTR after
4429 * the operation -- in this case because we want to make sure
4430 * we get the post-operation mtime and size.
4432 * Both of these changes to the XDR layer would in fact be quite
4433 * minor, but I decided to leave them for a subsequent patch.
4435 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4436 unsigned int pgbase, unsigned int pglen)
4438 struct nfs4_readlink args = {
4439 .fh = NFS_FH(inode),
4444 struct nfs4_readlink_res res;
4445 struct rpc_message msg = {
4446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4451 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4454 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4455 unsigned int pgbase, unsigned int pglen)
4457 struct nfs4_exception exception = {
4458 .interruptible = true,
4462 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4463 trace_nfs4_readlink(inode, err);
4464 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4466 } while (exception.retry);
4471 * This is just for mknod. open(O_CREAT) will always do ->open_context().
4474 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4477 struct nfs_server *server = NFS_SERVER(dir);
4478 struct nfs4_label l, *ilabel = NULL;
4479 struct nfs_open_context *ctx;
4480 struct nfs4_state *state;
4483 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4485 return PTR_ERR(ctx);
4487 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4489 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4490 sattr->ia_mode &= ~current_umask();
4491 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4492 if (IS_ERR(state)) {
4493 status = PTR_ERR(state);
4497 nfs4_label_release_security(ilabel);
4498 put_nfs_open_context(ctx);
4503 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
4505 struct nfs_server *server = NFS_SERVER(dir);
4506 struct nfs_removeargs args = {
4510 struct nfs_removeres res = {
4513 struct rpc_message msg = {
4514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4518 unsigned long timestamp = jiffies;
4521 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4523 spin_lock(&dir->i_lock);
4524 update_changeattr_locked(dir, &res.cinfo, timestamp, 0);
4525 /* Removing a directory decrements nlink in the parent */
4526 if (ftype == NF4DIR && dir->i_nlink > 2)
4527 nfs4_dec_nlink_locked(dir);
4528 spin_unlock(&dir->i_lock);
4533 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
4535 struct nfs4_exception exception = {
4536 .interruptible = true,
4538 struct inode *inode = d_inode(dentry);
4542 if (inode->i_nlink == 1)
4543 nfs4_inode_return_delegation(inode);
4545 nfs4_inode_make_writeable(inode);
4548 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
4549 trace_nfs4_remove(dir, &dentry->d_name, err);
4550 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4552 } while (exception.retry);
4556 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4558 struct nfs4_exception exception = {
4559 .interruptible = true,
4564 err = _nfs4_proc_remove(dir, name, NF4DIR);
4565 trace_nfs4_remove(dir, name, err);
4566 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4568 } while (exception.retry);
4572 static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4573 struct dentry *dentry,
4574 struct inode *inode)
4576 struct nfs_removeargs *args = msg->rpc_argp;
4577 struct nfs_removeres *res = msg->rpc_resp;
4579 res->server = NFS_SB(dentry->d_sb);
4580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4581 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
4583 nfs_fattr_init(res->dir_attr);
4586 nfs4_inode_return_delegation(inode);
4589 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4591 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4592 &data->args.seq_args,
4597 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4599 struct nfs_unlinkdata *data = task->tk_calldata;
4600 struct nfs_removeres *res = &data->res;
4602 if (!nfs4_sequence_done(task, &res->seq_res))
4604 if (nfs4_async_handle_error(task, res->server, NULL,
4605 &data->timeout) == -EAGAIN)
4607 if (task->tk_status == 0)
4608 update_changeattr(dir, &res->cinfo,
4609 res->dir_attr->time_start, 0);
4613 static void nfs4_proc_rename_setup(struct rpc_message *msg,
4614 struct dentry *old_dentry,
4615 struct dentry *new_dentry)
4617 struct nfs_renameargs *arg = msg->rpc_argp;
4618 struct nfs_renameres *res = msg->rpc_resp;
4619 struct inode *old_inode = d_inode(old_dentry);
4620 struct inode *new_inode = d_inode(new_dentry);
4623 nfs4_inode_make_writeable(old_inode);
4625 nfs4_inode_return_delegation(new_inode);
4626 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4627 res->server = NFS_SB(old_dentry->d_sb);
4628 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
4631 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4633 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4634 &data->args.seq_args,
4639 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4640 struct inode *new_dir)
4642 struct nfs_renamedata *data = task->tk_calldata;
4643 struct nfs_renameres *res = &data->res;
4645 if (!nfs4_sequence_done(task, &res->seq_res))
4647 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4650 if (task->tk_status == 0) {
4651 if (new_dir != old_dir) {
4652 /* Note: If we moved a directory, nlink will change */
4653 update_changeattr(old_dir, &res->old_cinfo,
4654 res->old_fattr->time_start,
4655 NFS_INO_INVALID_OTHER);
4656 update_changeattr(new_dir, &res->new_cinfo,
4657 res->new_fattr->time_start,
4658 NFS_INO_INVALID_OTHER);
4660 update_changeattr(old_dir, &res->old_cinfo,
4661 res->old_fattr->time_start,
4667 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4669 struct nfs_server *server = NFS_SERVER(inode);
4670 __u32 bitmask[NFS4_BITMASK_SZ];
4671 struct nfs4_link_arg arg = {
4672 .fh = NFS_FH(inode),
4673 .dir_fh = NFS_FH(dir),
4677 struct nfs4_link_res res = {
4681 struct rpc_message msg = {
4682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4686 int status = -ENOMEM;
4688 res.fattr = nfs_alloc_fattr();
4689 if (res.fattr == NULL)
4692 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4693 if (IS_ERR(res.label)) {
4694 status = PTR_ERR(res.label);
4698 nfs4_inode_make_writeable(inode);
4699 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
4701 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4703 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0);
4704 status = nfs_post_op_update_inode(inode, res.fattr);
4706 nfs_setsecurity(inode, res.fattr, res.label);
4710 nfs4_label_free(res.label);
4713 nfs_free_fattr(res.fattr);
4717 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4719 struct nfs4_exception exception = {
4720 .interruptible = true,
4724 err = nfs4_handle_exception(NFS_SERVER(inode),
4725 _nfs4_proc_link(inode, dir, name),
4727 } while (exception.retry);
4731 struct nfs4_createdata {
4732 struct rpc_message msg;
4733 struct nfs4_create_arg arg;
4734 struct nfs4_create_res res;
4736 struct nfs_fattr fattr;
4737 struct nfs4_label *label;
4740 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4741 const struct qstr *name, struct iattr *sattr, u32 ftype)
4743 struct nfs4_createdata *data;
4745 data = kzalloc(sizeof(*data), GFP_KERNEL);
4747 struct nfs_server *server = NFS_SERVER(dir);
4749 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4750 if (IS_ERR(data->label))
4753 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4754 data->msg.rpc_argp = &data->arg;
4755 data->msg.rpc_resp = &data->res;
4756 data->arg.dir_fh = NFS_FH(dir);
4757 data->arg.server = server;
4758 data->arg.name = name;
4759 data->arg.attrs = sattr;
4760 data->arg.ftype = ftype;
4761 data->arg.bitmask = nfs4_bitmask(server, data->label);
4762 data->arg.umask = current_umask();
4763 data->res.server = server;
4764 data->res.fh = &data->fh;
4765 data->res.fattr = &data->fattr;
4766 data->res.label = data->label;
4767 nfs_fattr_init(data->res.fattr);
4775 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4777 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4778 &data->arg.seq_args, &data->res.seq_res, 1);
4780 spin_lock(&dir->i_lock);
4781 update_changeattr_locked(dir, &data->res.dir_cinfo,
4782 data->res.fattr->time_start, 0);
4783 /* Creating a directory bumps nlink in the parent */
4784 if (data->arg.ftype == NF4DIR)
4785 nfs4_inc_nlink_locked(dir);
4786 spin_unlock(&dir->i_lock);
4787 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4792 static void nfs4_free_createdata(struct nfs4_createdata *data)
4794 nfs4_label_free(data->label);
4798 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4799 struct page *page, unsigned int len, struct iattr *sattr,
4800 struct nfs4_label *label)
4802 struct nfs4_createdata *data;
4803 int status = -ENAMETOOLONG;
4805 if (len > NFS4_MAXPATHLEN)
4809 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4813 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4814 data->arg.u.symlink.pages = &page;
4815 data->arg.u.symlink.len = len;
4816 data->arg.label = label;
4818 status = nfs4_do_create(dir, dentry, data);
4820 nfs4_free_createdata(data);
4825 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4826 struct page *page, unsigned int len, struct iattr *sattr)
4828 struct nfs4_exception exception = {
4829 .interruptible = true,
4831 struct nfs4_label l, *label = NULL;
4834 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4837 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4838 trace_nfs4_symlink(dir, &dentry->d_name, err);
4839 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4841 } while (exception.retry);
4843 nfs4_label_release_security(label);
4847 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4848 struct iattr *sattr, struct nfs4_label *label)
4850 struct nfs4_createdata *data;
4851 int status = -ENOMEM;
4853 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4857 data->arg.label = label;
4858 status = nfs4_do_create(dir, dentry, data);
4860 nfs4_free_createdata(data);
4865 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4866 struct iattr *sattr)
4868 struct nfs_server *server = NFS_SERVER(dir);
4869 struct nfs4_exception exception = {
4870 .interruptible = true,
4872 struct nfs4_label l, *label = NULL;
4875 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4877 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4878 sattr->ia_mode &= ~current_umask();
4880 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4881 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4882 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4884 } while (exception.retry);
4885 nfs4_label_release_security(label);
4890 static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4891 u64 cookie, struct page **pages, unsigned int count, bool plus)
4893 struct inode *dir = d_inode(dentry);
4894 struct nfs4_readdir_arg args = {
4899 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4902 struct nfs4_readdir_res res;
4903 struct rpc_message msg = {
4904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4911 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4913 (unsigned long long)cookie);
4914 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4915 res.pgbase = args.pgbase;
4916 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4918 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4919 status += args.pgbase;
4922 nfs_invalidate_atime(dir);
4924 dprintk("%s: returns %d\n", __func__, status);
4928 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
4929 u64 cookie, struct page **pages, unsigned int count, bool plus)
4931 struct nfs4_exception exception = {
4932 .interruptible = true,
4936 err = _nfs4_proc_readdir(dentry, cred, cookie,
4937 pages, count, plus);
4938 trace_nfs4_readdir(d_inode(dentry), err);
4939 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4941 } while (exception.retry);
4945 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4946 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4948 struct nfs4_createdata *data;
4949 int mode = sattr->ia_mode;
4950 int status = -ENOMEM;
4952 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4957 data->arg.ftype = NF4FIFO;
4958 else if (S_ISBLK(mode)) {
4959 data->arg.ftype = NF4BLK;
4960 data->arg.u.device.specdata1 = MAJOR(rdev);
4961 data->arg.u.device.specdata2 = MINOR(rdev);
4963 else if (S_ISCHR(mode)) {
4964 data->arg.ftype = NF4CHR;
4965 data->arg.u.device.specdata1 = MAJOR(rdev);
4966 data->arg.u.device.specdata2 = MINOR(rdev);
4967 } else if (!S_ISSOCK(mode)) {
4972 data->arg.label = label;
4973 status = nfs4_do_create(dir, dentry, data);
4975 nfs4_free_createdata(data);
4980 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4981 struct iattr *sattr, dev_t rdev)
4983 struct nfs_server *server = NFS_SERVER(dir);
4984 struct nfs4_exception exception = {
4985 .interruptible = true,
4987 struct nfs4_label l, *label = NULL;
4990 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4992 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4993 sattr->ia_mode &= ~current_umask();
4995 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4996 trace_nfs4_mknod(dir, &dentry->d_name, err);
4997 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4999 } while (exception.retry);
5001 nfs4_label_release_security(label);
5006 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5007 struct nfs_fsstat *fsstat)
5009 struct nfs4_statfs_arg args = {
5011 .bitmask = server->attr_bitmask,
5013 struct nfs4_statfs_res res = {
5016 struct rpc_message msg = {
5017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5022 nfs_fattr_init(fsstat->fattr);
5023 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5026 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5028 struct nfs4_exception exception = {
5029 .interruptible = true,
5033 err = nfs4_handle_exception(server,
5034 _nfs4_proc_statfs(server, fhandle, fsstat),
5036 } while (exception.retry);
5040 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5041 struct nfs_fsinfo *fsinfo)
5043 struct nfs4_fsinfo_arg args = {
5045 .bitmask = server->attr_bitmask,
5047 struct nfs4_fsinfo_res res = {
5050 struct rpc_message msg = {
5051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5056 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5059 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5061 struct nfs4_exception exception = {
5062 .interruptible = true,
5067 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
5068 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
5070 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
5073 err = nfs4_handle_exception(server, err, &exception);
5074 } while (exception.retry);
5078 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5082 nfs_fattr_init(fsinfo->fattr);
5083 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
5085 /* block layout checks this! */
5086 server->pnfs_blksize = fsinfo->blksize;
5087 set_pnfs_layoutdriver(server, fhandle, fsinfo);
5093 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5094 struct nfs_pathconf *pathconf)
5096 struct nfs4_pathconf_arg args = {
5098 .bitmask = server->attr_bitmask,
5100 struct nfs4_pathconf_res res = {
5101 .pathconf = pathconf,
5103 struct rpc_message msg = {
5104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5109 /* None of the pathconf attributes are mandatory to implement */
5110 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5111 memset(pathconf, 0, sizeof(*pathconf));
5115 nfs_fattr_init(pathconf->fattr);
5116 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5119 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5120 struct nfs_pathconf *pathconf)
5122 struct nfs4_exception exception = {
5123 .interruptible = true,
5128 err = nfs4_handle_exception(server,
5129 _nfs4_proc_pathconf(server, fhandle, pathconf),
5131 } while (exception.retry);
5135 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
5136 const struct nfs_open_context *ctx,
5137 const struct nfs_lock_context *l_ctx,
5140 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
5142 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5144 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5145 const struct nfs_open_context *ctx,
5146 const struct nfs_lock_context *l_ctx,
5149 nfs4_stateid _current_stateid;
5151 /* If the current stateid represents a lost lock, then exit */
5152 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
5154 return nfs4_stateid_match(stateid, &_current_stateid);
5157 static bool nfs4_error_stateid_expired(int err)
5160 case -NFS4ERR_DELEG_REVOKED:
5161 case -NFS4ERR_ADMIN_REVOKED:
5162 case -NFS4ERR_BAD_STATEID:
5163 case -NFS4ERR_STALE_STATEID:
5164 case -NFS4ERR_OLD_STATEID:
5165 case -NFS4ERR_OPENMODE:
5166 case -NFS4ERR_EXPIRED:
5172 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
5174 struct nfs_server *server = NFS_SERVER(hdr->inode);
5176 trace_nfs4_read(hdr, task->tk_status);
5177 if (task->tk_status < 0) {
5178 struct nfs4_exception exception = {
5179 .inode = hdr->inode,
5180 .state = hdr->args.context->state,
5181 .stateid = &hdr->args.stateid,
5183 task->tk_status = nfs4_async_handle_exception(task,
5184 server, task->tk_status, &exception);
5185 if (exception.retry) {
5186 rpc_restart_call_prepare(task);
5191 if (task->tk_status > 0)
5192 renew_lease(server, hdr->timestamp);
5196 static bool nfs4_read_stateid_changed(struct rpc_task *task,
5197 struct nfs_pgio_args *args)
5200 if (!nfs4_error_stateid_expired(task->tk_status) ||
5201 nfs4_stateid_is_current(&args->stateid,
5206 rpc_restart_call_prepare(task);
5210 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5213 dprintk("--> %s\n", __func__);
5215 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5217 if (nfs4_read_stateid_changed(task, &hdr->args))
5219 if (task->tk_status > 0)
5220 nfs_invalidate_atime(hdr->inode);
5221 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5222 nfs4_read_done_cb(task, hdr);
5225 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5226 struct rpc_message *msg)
5228 hdr->timestamp = jiffies;
5229 if (!hdr->pgio_done_cb)
5230 hdr->pgio_done_cb = nfs4_read_done_cb;
5231 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5232 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5235 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5236 struct nfs_pgio_header *hdr)
5238 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
5239 &hdr->args.seq_args,
5243 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5244 hdr->args.lock_context,
5245 hdr->rw_mode) == -EIO)
5247 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
5252 static int nfs4_write_done_cb(struct rpc_task *task,
5253 struct nfs_pgio_header *hdr)
5255 struct inode *inode = hdr->inode;
5257 trace_nfs4_write(hdr, task->tk_status);
5258 if (task->tk_status < 0) {
5259 struct nfs4_exception exception = {
5260 .inode = hdr->inode,
5261 .state = hdr->args.context->state,
5262 .stateid = &hdr->args.stateid,
5264 task->tk_status = nfs4_async_handle_exception(task,
5265 NFS_SERVER(inode), task->tk_status,
5267 if (exception.retry) {
5268 rpc_restart_call_prepare(task);
5272 if (task->tk_status >= 0) {
5273 renew_lease(NFS_SERVER(inode), hdr->timestamp);
5274 nfs_writeback_update_inode(hdr);
5279 static bool nfs4_write_stateid_changed(struct rpc_task *task,
5280 struct nfs_pgio_args *args)
5283 if (!nfs4_error_stateid_expired(task->tk_status) ||
5284 nfs4_stateid_is_current(&args->stateid,
5289 rpc_restart_call_prepare(task);
5293 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5295 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5297 if (nfs4_write_stateid_changed(task, &hdr->args))
5299 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5300 nfs4_write_done_cb(task, hdr);
5304 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
5306 /* Don't request attributes for pNFS or O_DIRECT writes */
5307 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5309 /* Otherwise, request attributes if and only if we don't hold
5312 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
5315 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
5316 struct rpc_message *msg,
5317 struct rpc_clnt **clnt)
5319 struct nfs_server *server = NFS_SERVER(hdr->inode);
5321 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5322 hdr->args.bitmask = NULL;
5323 hdr->res.fattr = NULL;
5325 hdr->args.bitmask = server->cache_consistency_bitmask;
5327 if (!hdr->pgio_done_cb)
5328 hdr->pgio_done_cb = nfs4_write_done_cb;
5329 hdr->res.server = server;
5330 hdr->timestamp = jiffies;
5332 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
5333 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5334 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
5337 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
5339 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
5340 &data->args.seq_args,
5345 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
5347 struct inode *inode = data->inode;
5349 trace_nfs4_commit(data, task->tk_status);
5350 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5351 NULL, NULL) == -EAGAIN) {
5352 rpc_restart_call_prepare(task);
5358 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5360 if (!nfs4_sequence_done(task, &data->res.seq_res))
5362 return data->commit_done_cb(task, data);
5365 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5366 struct rpc_clnt **clnt)
5368 struct nfs_server *server = NFS_SERVER(data->inode);
5370 if (data->commit_done_cb == NULL)
5371 data->commit_done_cb = nfs4_commit_done_cb;
5372 data->res.server = server;
5373 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
5374 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5375 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
5378 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5379 struct nfs_commitres *res)
5381 struct inode *dst_inode = file_inode(dst);
5382 struct nfs_server *server = NFS_SERVER(dst_inode);
5383 struct rpc_message msg = {
5384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5389 args->fh = NFS_FH(dst_inode);
5390 return nfs4_call_sync(server->client, server, &msg,
5391 &args->seq_args, &res->seq_res, 1);
5394 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5396 struct nfs_commitargs args = {
5400 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5401 struct nfs4_exception exception = { };
5405 status = _nfs4_proc_commit(dst, &args, res);
5406 status = nfs4_handle_exception(dst_server, status, &exception);
5407 } while (exception.retry);
5412 struct nfs4_renewdata {
5413 struct nfs_client *client;
5414 unsigned long timestamp;
5418 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5419 * standalone procedure for queueing an asynchronous RENEW.
5421 static void nfs4_renew_release(void *calldata)
5423 struct nfs4_renewdata *data = calldata;
5424 struct nfs_client *clp = data->client;
5426 if (refcount_read(&clp->cl_count) > 1)
5427 nfs4_schedule_state_renewal(clp);
5428 nfs_put_client(clp);
5432 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
5434 struct nfs4_renewdata *data = calldata;
5435 struct nfs_client *clp = data->client;
5436 unsigned long timestamp = data->timestamp;
5438 trace_nfs4_renew_async(clp, task->tk_status);
5439 switch (task->tk_status) {
5442 case -NFS4ERR_LEASE_MOVED:
5443 nfs4_schedule_lease_moved_recovery(clp);
5446 /* Unless we're shutting down, schedule state recovery! */
5447 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5449 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5450 nfs4_schedule_lease_recovery(clp);
5453 nfs4_schedule_path_down_recovery(clp);
5455 do_renew_lease(clp, timestamp);
5458 static const struct rpc_call_ops nfs4_renew_ops = {
5459 .rpc_call_done = nfs4_renew_done,
5460 .rpc_release = nfs4_renew_release,
5463 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
5465 struct rpc_message msg = {
5466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5470 struct nfs4_renewdata *data;
5472 if (renew_flags == 0)
5474 if (!refcount_inc_not_zero(&clp->cl_count))
5476 data = kmalloc(sizeof(*data), GFP_NOFS);
5478 nfs_put_client(clp);
5482 data->timestamp = jiffies;
5483 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5484 &nfs4_renew_ops, data);
5487 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
5489 struct rpc_message msg = {
5490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5494 unsigned long now = jiffies;
5497 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5500 do_renew_lease(clp, now);
5504 static inline int nfs4_server_supports_acls(struct nfs_server *server)
5506 return server->caps & NFS_CAP_ACLS;
5509 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5510 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
5513 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5515 static int buf_to_pages_noslab(const void *buf, size_t buflen,
5516 struct page **pages)
5518 struct page *newpage, **spages;
5524 len = min_t(size_t, PAGE_SIZE, buflen);
5525 newpage = alloc_page(GFP_KERNEL);
5527 if (newpage == NULL)
5529 memcpy(page_address(newpage), buf, len);
5534 } while (buflen != 0);
5540 __free_page(spages[rc-1]);
5544 struct nfs4_cached_acl {
5550 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5552 struct nfs_inode *nfsi = NFS_I(inode);
5554 spin_lock(&inode->i_lock);
5555 kfree(nfsi->nfs4_acl);
5556 nfsi->nfs4_acl = acl;
5557 spin_unlock(&inode->i_lock);
5560 static void nfs4_zap_acl_attr(struct inode *inode)
5562 nfs4_set_cached_acl(inode, NULL);
5565 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5567 struct nfs_inode *nfsi = NFS_I(inode);
5568 struct nfs4_cached_acl *acl;
5571 spin_lock(&inode->i_lock);
5572 acl = nfsi->nfs4_acl;
5575 if (buf == NULL) /* user is just asking for length */
5577 if (acl->cached == 0)
5579 ret = -ERANGE; /* see getxattr(2) man page */
5580 if (acl->len > buflen)
5582 memcpy(buf, acl->data, acl->len);
5586 spin_unlock(&inode->i_lock);
5590 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5592 struct nfs4_cached_acl *acl;
5593 size_t buflen = sizeof(*acl) + acl_len;
5595 if (buflen <= PAGE_SIZE) {
5596 acl = kmalloc(buflen, GFP_KERNEL);
5600 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5602 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5609 nfs4_set_cached_acl(inode, acl);
5613 * The getxattr API returns the required buffer length when called with a
5614 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5615 * the required buf. On a NULL buf, we send a page of data to the server
5616 * guessing that the ACL request can be serviced by a page. If so, we cache
5617 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5618 * the cache. If not so, we throw away the page, and cache the required
5619 * length. The next getxattr call will then produce another round trip to
5620 * the server, this time with the input buf of the required size.
5622 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5624 struct page **pages;
5625 struct nfs_getaclargs args = {
5626 .fh = NFS_FH(inode),
5629 struct nfs_getaclres res = {
5632 struct rpc_message msg = {
5633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5637 unsigned int npages;
5638 int ret = -ENOMEM, i;
5639 struct nfs_server *server = NFS_SERVER(inode);
5642 buflen = server->rsize;
5644 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5645 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS);
5649 args.acl_pages = pages;
5651 for (i = 0; i < npages; i++) {
5652 pages[i] = alloc_page(GFP_KERNEL);
5657 /* for decoding across pages */
5658 res.acl_scratch = alloc_page(GFP_KERNEL);
5659 if (!res.acl_scratch)
5662 args.acl_len = npages * PAGE_SIZE;
5664 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5665 __func__, buf, buflen, npages, args.acl_len);
5666 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5667 &msg, &args.seq_args, &res.seq_res, 0);
5671 /* Handle the case where the passed-in buffer is too short */
5672 if (res.acl_flags & NFS4_ACL_TRUNC) {
5673 /* Did the user only issue a request for the acl length? */
5679 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5681 if (res.acl_len > buflen) {
5685 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5690 for (i = 0; i < npages; i++)
5692 __free_page(pages[i]);
5693 if (res.acl_scratch)
5694 __free_page(res.acl_scratch);
5699 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5701 struct nfs4_exception exception = {
5702 .interruptible = true,
5706 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5707 trace_nfs4_get_acl(inode, ret);
5710 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5711 } while (exception.retry);
5715 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5717 struct nfs_server *server = NFS_SERVER(inode);
5720 if (!nfs4_server_supports_acls(server))
5722 ret = nfs_revalidate_inode(server, inode);
5725 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5726 nfs_zap_acl_cache(inode);
5727 ret = nfs4_read_cached_acl(inode, buf, buflen);
5729 /* -ENOENT is returned if there is no ACL or if there is an ACL
5730 * but no cached acl data, just the acl length */
5732 return nfs4_get_acl_uncached(inode, buf, buflen);
5735 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5737 struct nfs_server *server = NFS_SERVER(inode);
5738 struct page *pages[NFS4ACL_MAXPAGES];
5739 struct nfs_setaclargs arg = {
5740 .fh = NFS_FH(inode),
5744 struct nfs_setaclres res;
5745 struct rpc_message msg = {
5746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5750 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5753 if (!nfs4_server_supports_acls(server))
5755 if (npages > ARRAY_SIZE(pages))
5757 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5760 nfs4_inode_make_writeable(inode);
5761 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5764 * Free each page after tx, so the only ref left is
5765 * held by the network stack
5768 put_page(pages[i-1]);
5771 * Acl update can result in inode attribute update.
5772 * so mark the attribute cache invalid.
5774 spin_lock(&inode->i_lock);
5775 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
5776 | NFS_INO_INVALID_CTIME
5777 | NFS_INO_REVAL_FORCED;
5778 spin_unlock(&inode->i_lock);
5779 nfs_access_zap_cache(inode);
5780 nfs_zap_acl_cache(inode);
5784 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5786 struct nfs4_exception exception = { };
5789 err = __nfs4_proc_set_acl(inode, buf, buflen);
5790 trace_nfs4_set_acl(inode, err);
5791 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5793 } while (exception.retry);
5797 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5798 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5801 struct nfs_server *server = NFS_SERVER(inode);
5802 struct nfs_fattr fattr;
5803 struct nfs4_label label = {0, 0, buflen, buf};
5805 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5806 struct nfs4_getattr_arg arg = {
5807 .fh = NFS_FH(inode),
5810 struct nfs4_getattr_res res = {
5815 struct rpc_message msg = {
5816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5822 nfs_fattr_init(&fattr);
5824 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5827 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5829 if (buflen < label.len)
5834 static int nfs4_get_security_label(struct inode *inode, void *buf,
5837 struct nfs4_exception exception = {
5838 .interruptible = true,
5842 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5846 err = _nfs4_get_security_label(inode, buf, buflen);
5847 trace_nfs4_get_security_label(inode, err);
5848 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5850 } while (exception.retry);
5854 static int _nfs4_do_set_security_label(struct inode *inode,
5855 struct nfs4_label *ilabel,
5856 struct nfs_fattr *fattr,
5857 struct nfs4_label *olabel)
5860 struct iattr sattr = {0};
5861 struct nfs_server *server = NFS_SERVER(inode);
5862 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5863 struct nfs_setattrargs arg = {
5864 .fh = NFS_FH(inode),
5870 struct nfs_setattrres res = {
5875 struct rpc_message msg = {
5876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5882 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5884 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5886 dprintk("%s failed: %d\n", __func__, status);
5891 static int nfs4_do_set_security_label(struct inode *inode,
5892 struct nfs4_label *ilabel,
5893 struct nfs_fattr *fattr,
5894 struct nfs4_label *olabel)
5896 struct nfs4_exception exception = { };
5900 err = _nfs4_do_set_security_label(inode, ilabel,
5902 trace_nfs4_set_security_label(inode, err);
5903 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5905 } while (exception.retry);
5910 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5912 struct nfs4_label ilabel, *olabel = NULL;
5913 struct nfs_fattr fattr;
5916 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5919 nfs_fattr_init(&fattr);
5923 ilabel.label = (char *)buf;
5924 ilabel.len = buflen;
5926 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5927 if (IS_ERR(olabel)) {
5928 status = -PTR_ERR(olabel);
5932 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5934 nfs_setsecurity(inode, &fattr, olabel);
5936 nfs4_label_free(olabel);
5940 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5943 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5944 nfs4_verifier *bootverf)
5948 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5949 /* An impossible timestamp guarantees this value
5950 * will never match a generated boot time. */
5951 verf[0] = cpu_to_be32(U32_MAX);
5952 verf[1] = cpu_to_be32(U32_MAX);
5954 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5955 u64 ns = ktime_to_ns(nn->boot_time);
5957 verf[0] = cpu_to_be32(ns >> 32);
5958 verf[1] = cpu_to_be32(ns);
5960 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5964 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5969 if (clp->cl_owner_id != NULL)
5974 strlen(clp->cl_rpcclient->cl_nodename) +
5976 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5979 if (nfs4_client_id_uniquifier[0] != '\0')
5980 len += strlen(nfs4_client_id_uniquifier) + 1;
5981 if (len > NFS4_OPAQUE_LIMIT + 1)
5985 * Since this string is allocated at mount time, and held until the
5986 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5987 * about a memory-reclaim deadlock.
5989 str = kmalloc(len, GFP_KERNEL);
5994 if (nfs4_client_id_uniquifier[0] != '\0')
5995 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
5996 clp->cl_rpcclient->cl_nodename,
5997 nfs4_client_id_uniquifier,
5998 rpc_peeraddr2str(clp->cl_rpcclient,
6001 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
6002 clp->cl_rpcclient->cl_nodename,
6003 rpc_peeraddr2str(clp->cl_rpcclient,
6007 clp->cl_owner_id = str;
6012 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
6017 len = 10 + 10 + 1 + 10 + 1 +
6018 strlen(nfs4_client_id_uniquifier) + 1 +
6019 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6021 if (len > NFS4_OPAQUE_LIMIT + 1)
6025 * Since this string is allocated at mount time, and held until the
6026 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6027 * about a memory-reclaim deadlock.
6029 str = kmalloc(len, GFP_KERNEL);
6033 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6034 clp->rpc_ops->version, clp->cl_minorversion,
6035 nfs4_client_id_uniquifier,
6036 clp->cl_rpcclient->cl_nodename);
6037 clp->cl_owner_id = str;
6042 nfs4_init_uniform_client_string(struct nfs_client *clp)
6047 if (clp->cl_owner_id != NULL)
6050 if (nfs4_client_id_uniquifier[0] != '\0')
6051 return nfs4_init_uniquifier_client_string(clp);
6053 len = 10 + 10 + 1 + 10 + 1 +
6054 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6056 if (len > NFS4_OPAQUE_LIMIT + 1)
6060 * Since this string is allocated at mount time, and held until the
6061 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6062 * about a memory-reclaim deadlock.
6064 str = kmalloc(len, GFP_KERNEL);
6068 scnprintf(str, len, "Linux NFSv%u.%u %s",
6069 clp->rpc_ops->version, clp->cl_minorversion,
6070 clp->cl_rpcclient->cl_nodename);
6071 clp->cl_owner_id = str;
6076 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6077 * services. Advertise one based on the address family of the
6081 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6083 if (strchr(clp->cl_ipaddr, ':') != NULL)
6084 return scnprintf(buf, len, "tcp6");
6086 return scnprintf(buf, len, "tcp");
6089 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6091 struct nfs4_setclientid *sc = calldata;
6093 if (task->tk_status == 0)
6094 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6097 static const struct rpc_call_ops nfs4_setclientid_ops = {
6098 .rpc_call_done = nfs4_setclientid_done,
6102 * nfs4_proc_setclientid - Negotiate client ID
6103 * @clp: state data structure
6104 * @program: RPC program for NFSv4 callback service
6105 * @port: IP port number for NFS4 callback service
6106 * @cred: credential to use for this call
6107 * @res: where to place the result
6109 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6111 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
6112 unsigned short port, const struct cred *cred,
6113 struct nfs4_setclientid_res *res)
6115 nfs4_verifier sc_verifier;
6116 struct nfs4_setclientid setclientid = {
6117 .sc_verifier = &sc_verifier,
6121 struct rpc_message msg = {
6122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6123 .rpc_argp = &setclientid,
6127 struct rpc_task_setup task_setup_data = {
6128 .rpc_client = clp->cl_rpcclient,
6129 .rpc_message = &msg,
6130 .callback_ops = &nfs4_setclientid_ops,
6131 .callback_data = &setclientid,
6132 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
6134 unsigned long now = jiffies;
6137 /* nfs_client_id4 */
6138 nfs4_init_boot_verifier(clp, &sc_verifier);
6140 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6141 status = nfs4_init_uniform_client_string(clp);
6143 status = nfs4_init_nonuniform_client_string(clp);
6149 setclientid.sc_netid_len =
6150 nfs4_init_callback_netid(clp,
6151 setclientid.sc_netid,
6152 sizeof(setclientid.sc_netid));
6153 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
6154 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
6155 clp->cl_ipaddr, port >> 8, port & 255);
6157 dprintk("NFS call setclientid auth=%s, '%s'\n",
6158 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6161 status = nfs4_call_sync_custom(&task_setup_data);
6162 if (setclientid.sc_cred) {
6163 kfree(clp->cl_acceptor);
6164 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6165 put_rpccred(setclientid.sc_cred);
6169 do_renew_lease(clp, now);
6171 trace_nfs4_setclientid(clp, status);
6172 dprintk("NFS reply setclientid: %d\n", status);
6177 * nfs4_proc_setclientid_confirm - Confirm client ID
6178 * @clp: state data structure
6179 * @arg: result of a previous SETCLIENTID
6180 * @cred: credential to use for this call
6182 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6184 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
6185 struct nfs4_setclientid_res *arg,
6186 const struct cred *cred)
6188 struct rpc_message msg = {
6189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
6195 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6196 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6198 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6199 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
6200 trace_nfs4_setclientid_confirm(clp, status);
6201 dprintk("NFS reply setclientid_confirm: %d\n", status);
6205 struct nfs4_delegreturndata {
6206 struct nfs4_delegreturnargs args;
6207 struct nfs4_delegreturnres res;
6209 nfs4_stateid stateid;
6210 unsigned long timestamp;
6212 struct nfs4_layoutreturn_args arg;
6213 struct nfs4_layoutreturn_res res;
6214 struct nfs4_xdr_opaque_data ld_private;
6218 struct nfs_fattr fattr;
6220 struct inode *inode;
6223 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6225 struct nfs4_delegreturndata *data = calldata;
6226 struct nfs4_exception exception = {
6227 .inode = data->inode,
6228 .stateid = &data->stateid,
6231 if (!nfs4_sequence_done(task, &data->res.seq_res))
6234 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
6236 /* Handle Layoutreturn errors */
6237 if (pnfs_roc_done(task, data->inode,
6238 &data->args.lr_args,
6240 &data->res.lr_ret) == -EAGAIN)
6243 switch (task->tk_status) {
6245 renew_lease(data->res.server, data->timestamp);
6247 case -NFS4ERR_ADMIN_REVOKED:
6248 case -NFS4ERR_DELEG_REVOKED:
6249 case -NFS4ERR_EXPIRED:
6250 nfs4_free_revoked_stateid(data->res.server,
6252 task->tk_msg.rpc_cred);
6254 case -NFS4ERR_BAD_STATEID:
6255 case -NFS4ERR_STALE_STATEID:
6256 task->tk_status = 0;
6258 case -NFS4ERR_OLD_STATEID:
6259 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6260 nfs4_stateid_seqid_inc(&data->stateid);
6261 if (data->args.bitmask) {
6262 data->args.bitmask = NULL;
6263 data->res.fattr = NULL;
6266 case -NFS4ERR_ACCESS:
6267 if (data->args.bitmask) {
6268 data->args.bitmask = NULL;
6269 data->res.fattr = NULL;
6274 task->tk_status = nfs4_async_handle_exception(task,
6275 data->res.server, task->tk_status,
6277 if (exception.retry)
6280 nfs_delegation_mark_returned(data->inode, data->args.stateid);
6281 data->rpc_status = task->tk_status;
6284 task->tk_status = 0;
6285 rpc_restart_call_prepare(task);
6288 static void nfs4_delegreturn_release(void *calldata)
6290 struct nfs4_delegreturndata *data = calldata;
6291 struct inode *inode = data->inode;
6295 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6297 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
6298 nfs_iput_and_deactive(inode);
6303 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6305 struct nfs4_delegreturndata *d_data;
6306 struct pnfs_layout_hdr *lo;
6308 d_data = (struct nfs4_delegreturndata *)data;
6310 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6311 nfs4_sequence_done(task, &d_data->res.seq_res);
6315 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6316 if (lo && !pnfs_layout_is_valid(lo)) {
6317 d_data->args.lr_args = NULL;
6318 d_data->res.lr_res = NULL;
6321 nfs4_setup_sequence(d_data->res.server->nfs_client,
6322 &d_data->args.seq_args,
6323 &d_data->res.seq_res,
6327 static const struct rpc_call_ops nfs4_delegreturn_ops = {
6328 .rpc_call_prepare = nfs4_delegreturn_prepare,
6329 .rpc_call_done = nfs4_delegreturn_done,
6330 .rpc_release = nfs4_delegreturn_release,
6333 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6335 struct nfs4_delegreturndata *data;
6336 struct nfs_server *server = NFS_SERVER(inode);
6337 struct rpc_task *task;
6338 struct rpc_message msg = {
6339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6342 struct rpc_task_setup task_setup_data = {
6343 .rpc_client = server->client,
6344 .rpc_message = &msg,
6345 .callback_ops = &nfs4_delegreturn_ops,
6346 .flags = RPC_TASK_ASYNC,
6350 data = kzalloc(sizeof(*data), GFP_NOFS);
6353 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
6355 nfs4_state_protect(server->nfs_client,
6356 NFS_SP4_MACH_CRED_CLEANUP,
6357 &task_setup_data.rpc_client, &msg);
6359 data->args.fhandle = &data->fh;
6360 data->args.stateid = &data->stateid;
6361 data->args.bitmask = server->cache_consistency_bitmask;
6362 nfs_copy_fh(&data->fh, NFS_FH(inode));
6363 nfs4_stateid_copy(&data->stateid, stateid);
6364 data->res.fattr = &data->fattr;
6365 data->res.server = server;
6366 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6367 data->lr.arg.ld_private = &data->lr.ld_private;
6368 nfs_fattr_init(data->res.fattr);
6369 data->timestamp = jiffies;
6370 data->rpc_status = 0;
6371 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
6372 data->inode = nfs_igrab_and_active(inode);
6375 data->args.lr_args = &data->lr.arg;
6376 data->res.lr_res = &data->lr.res;
6378 } else if (data->lr.roc) {
6379 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6380 data->lr.roc = false;
6383 task_setup_data.callback_data = data;
6384 msg.rpc_argp = &data->args;
6385 msg.rpc_resp = &data->res;
6386 task = rpc_run_task(&task_setup_data);
6388 return PTR_ERR(task);
6391 status = rpc_wait_for_completion_task(task);
6394 status = data->rpc_status;
6400 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6402 struct nfs_server *server = NFS_SERVER(inode);
6403 struct nfs4_exception exception = { };
6406 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
6407 trace_nfs4_delegreturn(inode, stateid, err);
6409 case -NFS4ERR_STALE_STATEID:
6410 case -NFS4ERR_EXPIRED:
6414 err = nfs4_handle_exception(server, err, &exception);
6415 } while (exception.retry);
6419 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6421 struct inode *inode = state->inode;
6422 struct nfs_server *server = NFS_SERVER(inode);
6423 struct nfs_client *clp = server->nfs_client;
6424 struct nfs_lockt_args arg = {
6425 .fh = NFS_FH(inode),
6428 struct nfs_lockt_res res = {
6431 struct rpc_message msg = {
6432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
6435 .rpc_cred = state->owner->so_cred,
6437 struct nfs4_lock_state *lsp;
6440 arg.lock_owner.clientid = clp->cl_clientid;
6441 status = nfs4_set_lock_state(state, request);
6444 lsp = request->fl_u.nfs4_fl.owner;
6445 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6446 arg.lock_owner.s_dev = server->s_dev;
6447 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6450 request->fl_type = F_UNLCK;
6452 case -NFS4ERR_DENIED:
6455 request->fl_ops->fl_release_private(request);
6456 request->fl_ops = NULL;
6461 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6463 struct nfs4_exception exception = {
6464 .interruptible = true,
6469 err = _nfs4_proc_getlk(state, cmd, request);
6470 trace_nfs4_get_lock(request, state, cmd, err);
6471 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6473 } while (exception.retry);
6478 * Update the seqid of a lock stateid after receiving
6479 * NFS4ERR_OLD_STATEID
6481 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6482 struct nfs4_lock_state *lsp)
6484 struct nfs4_state *state = lsp->ls_state;
6487 spin_lock(&state->state_lock);
6488 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6490 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6491 nfs4_stateid_seqid_inc(dst);
6493 dst->seqid = lsp->ls_stateid.seqid;
6496 spin_unlock(&state->state_lock);
6500 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6501 struct nfs4_lock_state *lsp)
6503 struct nfs4_state *state = lsp->ls_state;
6506 spin_lock(&state->state_lock);
6507 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6508 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6509 spin_unlock(&state->state_lock);
6513 struct nfs4_unlockdata {
6514 struct nfs_locku_args arg;
6515 struct nfs_locku_res res;
6516 struct nfs4_lock_state *lsp;
6517 struct nfs_open_context *ctx;
6518 struct nfs_lock_context *l_ctx;
6519 struct file_lock fl;
6520 struct nfs_server *server;
6521 unsigned long timestamp;
6524 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6525 struct nfs_open_context *ctx,
6526 struct nfs4_lock_state *lsp,
6527 struct nfs_seqid *seqid)
6529 struct nfs4_unlockdata *p;
6530 struct nfs4_state *state = lsp->ls_state;
6531 struct inode *inode = state->inode;
6533 p = kzalloc(sizeof(*p), GFP_NOFS);
6536 p->arg.fh = NFS_FH(inode);
6538 p->arg.seqid = seqid;
6539 p->res.seqid = seqid;
6541 /* Ensure we don't close file until we're done freeing locks! */
6542 p->ctx = get_nfs_open_context(ctx);
6543 p->l_ctx = nfs_get_lock_context(ctx);
6544 locks_init_lock(&p->fl);
6545 locks_copy_lock(&p->fl, fl);
6546 p->server = NFS_SERVER(inode);
6547 spin_lock(&state->state_lock);
6548 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6549 spin_unlock(&state->state_lock);
6553 static void nfs4_locku_release_calldata(void *data)
6555 struct nfs4_unlockdata *calldata = data;
6556 nfs_free_seqid(calldata->arg.seqid);
6557 nfs4_put_lock_state(calldata->lsp);
6558 nfs_put_lock_context(calldata->l_ctx);
6559 put_nfs_open_context(calldata->ctx);
6563 static void nfs4_locku_done(struct rpc_task *task, void *data)
6565 struct nfs4_unlockdata *calldata = data;
6566 struct nfs4_exception exception = {
6567 .inode = calldata->lsp->ls_state->inode,
6568 .stateid = &calldata->arg.stateid,
6571 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6573 switch (task->tk_status) {
6575 renew_lease(calldata->server, calldata->timestamp);
6576 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6577 if (nfs4_update_lock_stateid(calldata->lsp,
6578 &calldata->res.stateid))
6581 case -NFS4ERR_ADMIN_REVOKED:
6582 case -NFS4ERR_EXPIRED:
6583 nfs4_free_revoked_stateid(calldata->server,
6584 &calldata->arg.stateid,
6585 task->tk_msg.rpc_cred);
6587 case -NFS4ERR_BAD_STATEID:
6588 case -NFS4ERR_STALE_STATEID:
6589 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6591 rpc_restart_call_prepare(task);
6593 case -NFS4ERR_OLD_STATEID:
6594 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6596 rpc_restart_call_prepare(task);
6599 task->tk_status = nfs4_async_handle_exception(task,
6600 calldata->server, task->tk_status,
6602 if (exception.retry)
6603 rpc_restart_call_prepare(task);
6605 nfs_release_seqid(calldata->arg.seqid);
6608 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6610 struct nfs4_unlockdata *calldata = data;
6612 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6613 nfs_async_iocounter_wait(task, calldata->l_ctx))
6616 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6618 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6619 /* Note: exit _without_ running nfs4_locku_done */
6622 calldata->timestamp = jiffies;
6623 if (nfs4_setup_sequence(calldata->server->nfs_client,
6624 &calldata->arg.seq_args,
6625 &calldata->res.seq_res,
6627 nfs_release_seqid(calldata->arg.seqid);
6630 task->tk_action = NULL;
6632 nfs4_sequence_done(task, &calldata->res.seq_res);
6635 static const struct rpc_call_ops nfs4_locku_ops = {
6636 .rpc_call_prepare = nfs4_locku_prepare,
6637 .rpc_call_done = nfs4_locku_done,
6638 .rpc_release = nfs4_locku_release_calldata,
6641 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6642 struct nfs_open_context *ctx,
6643 struct nfs4_lock_state *lsp,
6644 struct nfs_seqid *seqid)
6646 struct nfs4_unlockdata *data;
6647 struct rpc_message msg = {
6648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6649 .rpc_cred = ctx->cred,
6651 struct rpc_task_setup task_setup_data = {
6652 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6653 .rpc_message = &msg,
6654 .callback_ops = &nfs4_locku_ops,
6655 .workqueue = nfsiod_workqueue,
6656 .flags = RPC_TASK_ASYNC,
6659 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6660 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6662 /* Ensure this is an unlock - when canceling a lock, the
6663 * canceled lock is passed in, and it won't be an unlock.
6665 fl->fl_type = F_UNLCK;
6666 if (fl->fl_flags & FL_CLOSE)
6667 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
6669 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6671 nfs_free_seqid(seqid);
6672 return ERR_PTR(-ENOMEM);
6675 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
6676 msg.rpc_argp = &data->arg;
6677 msg.rpc_resp = &data->res;
6678 task_setup_data.callback_data = data;
6679 return rpc_run_task(&task_setup_data);
6682 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6684 struct inode *inode = state->inode;
6685 struct nfs4_state_owner *sp = state->owner;
6686 struct nfs_inode *nfsi = NFS_I(inode);
6687 struct nfs_seqid *seqid;
6688 struct nfs4_lock_state *lsp;
6689 struct rpc_task *task;
6690 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6692 unsigned char fl_flags = request->fl_flags;
6694 status = nfs4_set_lock_state(state, request);
6695 /* Unlock _before_ we do the RPC call */
6696 request->fl_flags |= FL_EXISTS;
6697 /* Exclude nfs_delegation_claim_locks() */
6698 mutex_lock(&sp->so_delegreturn_mutex);
6699 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
6700 down_read(&nfsi->rwsem);
6701 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6702 up_read(&nfsi->rwsem);
6703 mutex_unlock(&sp->so_delegreturn_mutex);
6706 up_read(&nfsi->rwsem);
6707 mutex_unlock(&sp->so_delegreturn_mutex);
6710 /* Is this a delegated lock? */
6711 lsp = request->fl_u.nfs4_fl.owner;
6712 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6714 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6715 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6719 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6720 status = PTR_ERR(task);
6723 status = rpc_wait_for_completion_task(task);
6726 request->fl_flags = fl_flags;
6727 trace_nfs4_unlock(request, state, F_SETLK, status);
6731 struct nfs4_lockdata {
6732 struct nfs_lock_args arg;
6733 struct nfs_lock_res res;
6734 struct nfs4_lock_state *lsp;
6735 struct nfs_open_context *ctx;
6736 struct file_lock fl;
6737 unsigned long timestamp;
6740 struct nfs_server *server;
6743 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6744 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6747 struct nfs4_lockdata *p;
6748 struct inode *inode = lsp->ls_state->inode;
6749 struct nfs_server *server = NFS_SERVER(inode);
6750 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6752 p = kzalloc(sizeof(*p), gfp_mask);
6756 p->arg.fh = NFS_FH(inode);
6758 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6759 if (IS_ERR(p->arg.open_seqid))
6761 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6762 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6763 if (IS_ERR(p->arg.lock_seqid))
6764 goto out_free_seqid;
6765 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6766 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6767 p->arg.lock_owner.s_dev = server->s_dev;
6768 p->res.lock_seqid = p->arg.lock_seqid;
6771 p->ctx = get_nfs_open_context(ctx);
6772 locks_init_lock(&p->fl);
6773 locks_copy_lock(&p->fl, fl);
6776 nfs_free_seqid(p->arg.open_seqid);
6782 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6784 struct nfs4_lockdata *data = calldata;
6785 struct nfs4_state *state = data->lsp->ls_state;
6787 dprintk("%s: begin!\n", __func__);
6788 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6790 /* Do we need to do an open_to_lock_owner? */
6791 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6792 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6793 goto out_release_lock_seqid;
6795 nfs4_stateid_copy(&data->arg.open_stateid,
6796 &state->open_stateid);
6797 data->arg.new_lock_owner = 1;
6798 data->res.open_seqid = data->arg.open_seqid;
6800 data->arg.new_lock_owner = 0;
6801 nfs4_stateid_copy(&data->arg.lock_stateid,
6802 &data->lsp->ls_stateid);
6804 if (!nfs4_valid_open_stateid(state)) {
6805 data->rpc_status = -EBADF;
6806 task->tk_action = NULL;
6807 goto out_release_open_seqid;
6809 data->timestamp = jiffies;
6810 if (nfs4_setup_sequence(data->server->nfs_client,
6811 &data->arg.seq_args,
6815 out_release_open_seqid:
6816 nfs_release_seqid(data->arg.open_seqid);
6817 out_release_lock_seqid:
6818 nfs_release_seqid(data->arg.lock_seqid);
6820 nfs4_sequence_done(task, &data->res.seq_res);
6821 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6824 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6826 struct nfs4_lockdata *data = calldata;
6827 struct nfs4_lock_state *lsp = data->lsp;
6829 dprintk("%s: begin!\n", __func__);
6831 if (!nfs4_sequence_done(task, &data->res.seq_res))
6834 data->rpc_status = task->tk_status;
6835 switch (task->tk_status) {
6837 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6839 if (data->arg.new_lock && !data->cancelled) {
6840 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6841 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6844 if (data->arg.new_lock_owner != 0) {
6845 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6846 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6847 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6848 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6851 case -NFS4ERR_BAD_STATEID:
6852 case -NFS4ERR_OLD_STATEID:
6853 case -NFS4ERR_STALE_STATEID:
6854 case -NFS4ERR_EXPIRED:
6855 if (data->arg.new_lock_owner != 0) {
6856 if (!nfs4_stateid_match(&data->arg.open_stateid,
6857 &lsp->ls_state->open_stateid))
6859 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6864 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6867 if (!data->cancelled)
6868 rpc_restart_call_prepare(task);
6872 static void nfs4_lock_release(void *calldata)
6874 struct nfs4_lockdata *data = calldata;
6876 dprintk("%s: begin!\n", __func__);
6877 nfs_free_seqid(data->arg.open_seqid);
6878 if (data->cancelled && data->rpc_status == 0) {
6879 struct rpc_task *task;
6880 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6881 data->arg.lock_seqid);
6883 rpc_put_task_async(task);
6884 dprintk("%s: cancelling lock!\n", __func__);
6886 nfs_free_seqid(data->arg.lock_seqid);
6887 nfs4_put_lock_state(data->lsp);
6888 put_nfs_open_context(data->ctx);
6890 dprintk("%s: done!\n", __func__);
6893 static const struct rpc_call_ops nfs4_lock_ops = {
6894 .rpc_call_prepare = nfs4_lock_prepare,
6895 .rpc_call_done = nfs4_lock_done,
6896 .rpc_release = nfs4_lock_release,
6899 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6902 case -NFS4ERR_ADMIN_REVOKED:
6903 case -NFS4ERR_EXPIRED:
6904 case -NFS4ERR_BAD_STATEID:
6905 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6906 if (new_lock_owner != 0 ||
6907 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6908 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6910 case -NFS4ERR_STALE_STATEID:
6911 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6912 nfs4_schedule_lease_recovery(server->nfs_client);
6916 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6918 struct nfs4_lockdata *data;
6919 struct rpc_task *task;
6920 struct rpc_message msg = {
6921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6922 .rpc_cred = state->owner->so_cred,
6924 struct rpc_task_setup task_setup_data = {
6925 .rpc_client = NFS_CLIENT(state->inode),
6926 .rpc_message = &msg,
6927 .callback_ops = &nfs4_lock_ops,
6928 .workqueue = nfsiod_workqueue,
6929 .flags = RPC_TASK_ASYNC,
6933 dprintk("%s: begin!\n", __func__);
6934 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6935 fl->fl_u.nfs4_fl.owner,
6936 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6940 data->arg.block = 1;
6941 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
6942 recovery_type > NFS_LOCK_NEW);
6943 msg.rpc_argp = &data->arg;
6944 msg.rpc_resp = &data->res;
6945 task_setup_data.callback_data = data;
6946 if (recovery_type > NFS_LOCK_NEW) {
6947 if (recovery_type == NFS_LOCK_RECLAIM)
6948 data->arg.reclaim = NFS_LOCK_RECLAIM;
6950 data->arg.new_lock = 1;
6951 task = rpc_run_task(&task_setup_data);
6953 return PTR_ERR(task);
6954 ret = rpc_wait_for_completion_task(task);
6956 ret = data->rpc_status;
6958 nfs4_handle_setlk_error(data->server, data->lsp,
6959 data->arg.new_lock_owner, ret);
6961 data->cancelled = true;
6963 dprintk("%s: done, ret = %d!\n", __func__, ret);
6964 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6968 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6970 struct nfs_server *server = NFS_SERVER(state->inode);
6971 struct nfs4_exception exception = {
6972 .inode = state->inode,
6977 /* Cache the lock if possible... */
6978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6980 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6981 if (err != -NFS4ERR_DELAY)
6983 nfs4_handle_exception(server, err, &exception);
6984 } while (exception.retry);
6988 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6990 struct nfs_server *server = NFS_SERVER(state->inode);
6991 struct nfs4_exception exception = {
6992 .inode = state->inode,
6996 err = nfs4_set_lock_state(state, request);
6999 if (!recover_lost_locks) {
7000 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7004 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7006 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
7010 case -NFS4ERR_GRACE:
7011 case -NFS4ERR_DELAY:
7012 nfs4_handle_exception(server, err, &exception);
7015 } while (exception.retry);
7020 #if defined(CONFIG_NFS_V4_1)
7021 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7023 struct nfs4_lock_state *lsp;
7026 status = nfs4_set_lock_state(state, request);
7029 lsp = request->fl_u.nfs4_fl.owner;
7030 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7031 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7033 return nfs4_lock_expired(state, request);
7037 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7039 struct nfs_inode *nfsi = NFS_I(state->inode);
7040 struct nfs4_state_owner *sp = state->owner;
7041 unsigned char fl_flags = request->fl_flags;
7044 request->fl_flags |= FL_ACCESS;
7045 status = locks_lock_inode_wait(state->inode, request);
7048 mutex_lock(&sp->so_delegreturn_mutex);
7049 down_read(&nfsi->rwsem);
7050 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
7051 /* Yes: cache locks! */
7052 /* ...but avoid races with delegation recall... */
7053 request->fl_flags = fl_flags & ~FL_SLEEP;
7054 status = locks_lock_inode_wait(state->inode, request);
7055 up_read(&nfsi->rwsem);
7056 mutex_unlock(&sp->so_delegreturn_mutex);
7059 up_read(&nfsi->rwsem);
7060 mutex_unlock(&sp->so_delegreturn_mutex);
7061 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
7063 request->fl_flags = fl_flags;
7067 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7069 struct nfs4_exception exception = {
7071 .inode = state->inode,
7072 .interruptible = true,
7077 err = _nfs4_proc_setlk(state, cmd, request);
7078 if (err == -NFS4ERR_DENIED)
7080 err = nfs4_handle_exception(NFS_SERVER(state->inode),
7082 } while (exception.retry);
7086 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7087 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7090 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7091 struct file_lock *request)
7093 int status = -ERESTARTSYS;
7094 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7096 while(!signalled()) {
7097 status = nfs4_proc_setlk(state, cmd, request);
7098 if ((status != -EAGAIN) || IS_SETLK(cmd))
7100 freezable_schedule_timeout_interruptible(timeout);
7102 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7103 status = -ERESTARTSYS;
7108 #ifdef CONFIG_NFS_V4_1
7109 struct nfs4_lock_waiter {
7110 struct task_struct *task;
7111 struct inode *inode;
7112 struct nfs_lowner *owner;
7116 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
7119 struct nfs4_lock_waiter *waiter = wait->private;
7121 /* NULL key means to wake up everyone */
7123 struct cb_notify_lock_args *cbnl = key;
7124 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
7125 *wowner = waiter->owner;
7127 /* Only wake if the callback was for the same owner. */
7128 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7131 /* Make sure it's for the right inode */
7132 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7136 /* override "private" so we can use default_wake_function */
7137 wait->private = waiter->task;
7138 ret = woken_wake_function(wait, mode, flags, key);
7140 list_del_init(&wait->entry);
7141 wait->private = waiter;
7146 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7148 int status = -ERESTARTSYS;
7149 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7150 struct nfs_server *server = NFS_SERVER(state->inode);
7151 struct nfs_client *clp = server->nfs_client;
7152 wait_queue_head_t *q = &clp->cl_lock_waitq;
7153 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
7154 .id = lsp->ls_seqid.owner_id,
7155 .s_dev = server->s_dev };
7156 struct nfs4_lock_waiter waiter = { .task = current,
7157 .inode = state->inode,
7159 wait_queue_entry_t wait;
7161 /* Don't bother with waitqueue if we don't expect a callback */
7162 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7163 return nfs4_retry_setlk_simple(state, cmd, request);
7166 wait.private = &waiter;
7167 wait.func = nfs4_wake_lock_waiter;
7169 while(!signalled()) {
7170 add_wait_queue(q, &wait);
7171 status = nfs4_proc_setlk(state, cmd, request);
7172 if ((status != -EAGAIN) || IS_SETLK(cmd)) {
7173 finish_wait(q, &wait);
7177 status = -ERESTARTSYS;
7178 freezer_do_not_count();
7179 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
7181 finish_wait(q, &wait);
7186 #else /* !CONFIG_NFS_V4_1 */
7188 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7190 return nfs4_retry_setlk_simple(state, cmd, request);
7195 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7197 struct nfs_open_context *ctx;
7198 struct nfs4_state *state;
7201 /* verify open state */
7202 ctx = nfs_file_open_context(filp);
7205 if (IS_GETLK(cmd)) {
7207 return nfs4_proc_getlk(state, F_GETLK, request);
7211 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7214 if (request->fl_type == F_UNLCK) {
7216 return nfs4_proc_unlck(state, cmd, request);
7223 if ((request->fl_flags & FL_POSIX) &&
7224 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7228 * Don't rely on the VFS having checked the file open mode,
7229 * since it won't do this for flock() locks.
7231 switch (request->fl_type) {
7233 if (!(filp->f_mode & FMODE_READ))
7237 if (!(filp->f_mode & FMODE_WRITE))
7241 status = nfs4_set_lock_state(state, request);
7245 return nfs4_retry_setlk(state, cmd, request);
7248 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
7250 struct nfs_server *server = NFS_SERVER(state->inode);
7253 err = nfs4_set_lock_state(state, fl);
7256 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7257 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
7260 struct nfs_release_lockowner_data {
7261 struct nfs4_lock_state *lsp;
7262 struct nfs_server *server;
7263 struct nfs_release_lockowner_args args;
7264 struct nfs_release_lockowner_res res;
7265 unsigned long timestamp;
7268 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7270 struct nfs_release_lockowner_data *data = calldata;
7271 struct nfs_server *server = data->server;
7272 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7273 &data->res.seq_res, task);
7274 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7275 data->timestamp = jiffies;
7278 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7280 struct nfs_release_lockowner_data *data = calldata;
7281 struct nfs_server *server = data->server;
7283 nfs40_sequence_done(task, &data->res.seq_res);
7285 switch (task->tk_status) {
7287 renew_lease(server, data->timestamp);
7289 case -NFS4ERR_STALE_CLIENTID:
7290 case -NFS4ERR_EXPIRED:
7291 nfs4_schedule_lease_recovery(server->nfs_client);
7293 case -NFS4ERR_LEASE_MOVED:
7294 case -NFS4ERR_DELAY:
7295 if (nfs4_async_handle_error(task, server,
7296 NULL, NULL) == -EAGAIN)
7297 rpc_restart_call_prepare(task);
7301 static void nfs4_release_lockowner_release(void *calldata)
7303 struct nfs_release_lockowner_data *data = calldata;
7304 nfs4_free_lock_state(data->server, data->lsp);
7308 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
7309 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7310 .rpc_call_done = nfs4_release_lockowner_done,
7311 .rpc_release = nfs4_release_lockowner_release,
7315 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
7317 struct nfs_release_lockowner_data *data;
7318 struct rpc_message msg = {
7319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7322 if (server->nfs_client->cl_mvops->minor_version != 0)
7325 data = kmalloc(sizeof(*data), GFP_NOFS);
7329 data->server = server;
7330 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7331 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7332 data->args.lock_owner.s_dev = server->s_dev;
7334 msg.rpc_argp = &data->args;
7335 msg.rpc_resp = &data->res;
7336 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
7337 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
7340 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7342 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
7343 struct dentry *unused, struct inode *inode,
7344 const char *key, const void *buf,
7345 size_t buflen, int flags)
7347 return nfs4_proc_set_acl(inode, buf, buflen);
7350 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
7351 struct dentry *unused, struct inode *inode,
7352 const char *key, void *buf, size_t buflen)
7354 return nfs4_proc_get_acl(inode, buf, buflen);
7357 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
7359 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
7362 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
7364 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
7365 struct dentry *unused, struct inode *inode,
7366 const char *key, const void *buf,
7367 size_t buflen, int flags)
7369 if (security_ismaclabel(key))
7370 return nfs4_set_security_label(inode, buf, buflen);
7375 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
7376 struct dentry *unused, struct inode *inode,
7377 const char *key, void *buf, size_t buflen)
7379 if (security_ismaclabel(key))
7380 return nfs4_get_security_label(inode, buf, buflen);
7385 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7389 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7390 len = security_inode_listsecurity(inode, list, list_len);
7391 if (list_len && len > list_len)
7397 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7398 .prefix = XATTR_SECURITY_PREFIX,
7399 .get = nfs4_xattr_get_nfs4_label,
7400 .set = nfs4_xattr_set_nfs4_label,
7406 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7414 * nfs_fhget will use either the mounted_on_fileid or the fileid
7416 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7418 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7419 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7420 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
7421 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
7424 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
7425 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
7426 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7430 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7431 const struct qstr *name,
7432 struct nfs4_fs_locations *fs_locations,
7435 struct nfs_server *server = NFS_SERVER(dir);
7437 struct nfs4_fs_locations_arg args = {
7438 .dir_fh = NFS_FH(dir),
7443 struct nfs4_fs_locations_res res = {
7444 .fs_locations = fs_locations,
7446 struct rpc_message msg = {
7447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7453 dprintk("%s: start\n", __func__);
7455 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7456 bitmask[1] = nfs4_fattr_bitmap[1];
7458 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7459 * is not supported */
7460 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
7461 bitmask[0] &= ~FATTR4_WORD0_FILEID;
7463 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
7465 nfs_fattr_init(&fs_locations->fattr);
7466 fs_locations->server = server;
7467 fs_locations->nlocations = 0;
7468 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
7469 dprintk("%s: returned status = %d\n", __func__, status);
7473 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7474 const struct qstr *name,
7475 struct nfs4_fs_locations *fs_locations,
7478 struct nfs4_exception exception = {
7479 .interruptible = true,
7483 err = _nfs4_proc_fs_locations(client, dir, name,
7484 fs_locations, page);
7485 trace_nfs4_get_fs_locations(dir, name, err);
7486 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7488 } while (exception.retry);
7493 * This operation also signals the server that this client is
7494 * performing migration recovery. The server can stop returning
7495 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7496 * appended to this compound to identify the client ID which is
7497 * performing recovery.
7499 static int _nfs40_proc_get_locations(struct inode *inode,
7500 struct nfs4_fs_locations *locations,
7501 struct page *page, const struct cred *cred)
7503 struct nfs_server *server = NFS_SERVER(inode);
7504 struct rpc_clnt *clnt = server->client;
7506 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7508 struct nfs4_fs_locations_arg args = {
7509 .clientid = server->nfs_client->cl_clientid,
7510 .fh = NFS_FH(inode),
7513 .migration = 1, /* skip LOOKUP */
7514 .renew = 1, /* append RENEW */
7516 struct nfs4_fs_locations_res res = {
7517 .fs_locations = locations,
7521 struct rpc_message msg = {
7522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7527 unsigned long now = jiffies;
7530 nfs_fattr_init(&locations->fattr);
7531 locations->server = server;
7532 locations->nlocations = 0;
7534 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7535 status = nfs4_call_sync_sequence(clnt, server, &msg,
7536 &args.seq_args, &res.seq_res);
7540 renew_lease(server, now);
7544 #ifdef CONFIG_NFS_V4_1
7547 * This operation also signals the server that this client is
7548 * performing migration recovery. The server can stop asserting
7549 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7550 * performing this operation is identified in the SEQUENCE
7551 * operation in this compound.
7553 * When the client supports GETATTR(fs_locations_info), it can
7554 * be plumbed in here.
7556 static int _nfs41_proc_get_locations(struct inode *inode,
7557 struct nfs4_fs_locations *locations,
7558 struct page *page, const struct cred *cred)
7560 struct nfs_server *server = NFS_SERVER(inode);
7561 struct rpc_clnt *clnt = server->client;
7563 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7565 struct nfs4_fs_locations_arg args = {
7566 .fh = NFS_FH(inode),
7569 .migration = 1, /* skip LOOKUP */
7571 struct nfs4_fs_locations_res res = {
7572 .fs_locations = locations,
7575 struct rpc_message msg = {
7576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7583 nfs_fattr_init(&locations->fattr);
7584 locations->server = server;
7585 locations->nlocations = 0;
7587 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7588 status = nfs4_call_sync_sequence(clnt, server, &msg,
7589 &args.seq_args, &res.seq_res);
7590 if (status == NFS4_OK &&
7591 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7592 status = -NFS4ERR_LEASE_MOVED;
7596 #endif /* CONFIG_NFS_V4_1 */
7599 * nfs4_proc_get_locations - discover locations for a migrated FSID
7600 * @inode: inode on FSID that is migrating
7601 * @locations: result of query
7603 * @cred: credential to use for this operation
7605 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7606 * operation failed, or a negative errno if a local error occurred.
7608 * On success, "locations" is filled in, but if the server has
7609 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7612 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7613 * from this client that require migration recovery.
7615 int nfs4_proc_get_locations(struct inode *inode,
7616 struct nfs4_fs_locations *locations,
7617 struct page *page, const struct cred *cred)
7619 struct nfs_server *server = NFS_SERVER(inode);
7620 struct nfs_client *clp = server->nfs_client;
7621 const struct nfs4_mig_recovery_ops *ops =
7622 clp->cl_mvops->mig_recovery_ops;
7623 struct nfs4_exception exception = {
7624 .interruptible = true,
7628 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7629 (unsigned long long)server->fsid.major,
7630 (unsigned long long)server->fsid.minor,
7632 nfs_display_fhandle(NFS_FH(inode), __func__);
7635 status = ops->get_locations(inode, locations, page, cred);
7636 if (status != -NFS4ERR_DELAY)
7638 nfs4_handle_exception(server, status, &exception);
7639 } while (exception.retry);
7644 * This operation also signals the server that this client is
7645 * performing "lease moved" recovery. The server can stop
7646 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7647 * is appended to this compound to identify the client ID which is
7648 * performing recovery.
7650 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
7652 struct nfs_server *server = NFS_SERVER(inode);
7653 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7654 struct rpc_clnt *clnt = server->client;
7655 struct nfs4_fsid_present_arg args = {
7656 .fh = NFS_FH(inode),
7657 .clientid = clp->cl_clientid,
7658 .renew = 1, /* append RENEW */
7660 struct nfs4_fsid_present_res res = {
7663 struct rpc_message msg = {
7664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7669 unsigned long now = jiffies;
7672 res.fh = nfs_alloc_fhandle();
7676 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7677 status = nfs4_call_sync_sequence(clnt, server, &msg,
7678 &args.seq_args, &res.seq_res);
7679 nfs_free_fhandle(res.fh);
7683 do_renew_lease(clp, now);
7687 #ifdef CONFIG_NFS_V4_1
7690 * This operation also signals the server that this client is
7691 * performing "lease moved" recovery. The server can stop asserting
7692 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7693 * this operation is identified in the SEQUENCE operation in this
7696 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
7698 struct nfs_server *server = NFS_SERVER(inode);
7699 struct rpc_clnt *clnt = server->client;
7700 struct nfs4_fsid_present_arg args = {
7701 .fh = NFS_FH(inode),
7703 struct nfs4_fsid_present_res res = {
7705 struct rpc_message msg = {
7706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7713 res.fh = nfs_alloc_fhandle();
7717 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7718 status = nfs4_call_sync_sequence(clnt, server, &msg,
7719 &args.seq_args, &res.seq_res);
7720 nfs_free_fhandle(res.fh);
7721 if (status == NFS4_OK &&
7722 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7723 status = -NFS4ERR_LEASE_MOVED;
7727 #endif /* CONFIG_NFS_V4_1 */
7730 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7731 * @inode: inode on FSID to check
7732 * @cred: credential to use for this operation
7734 * Server indicates whether the FSID is present, moved, or not
7735 * recognized. This operation is necessary to clear a LEASE_MOVED
7736 * condition for this client ID.
7738 * Returns NFS4_OK if the FSID is present on this server,
7739 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7740 * NFS4ERR code if some error occurred on the server, or a
7741 * negative errno if a local failure occurred.
7743 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
7745 struct nfs_server *server = NFS_SERVER(inode);
7746 struct nfs_client *clp = server->nfs_client;
7747 const struct nfs4_mig_recovery_ops *ops =
7748 clp->cl_mvops->mig_recovery_ops;
7749 struct nfs4_exception exception = {
7750 .interruptible = true,
7754 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7755 (unsigned long long)server->fsid.major,
7756 (unsigned long long)server->fsid.minor,
7758 nfs_display_fhandle(NFS_FH(inode), __func__);
7761 status = ops->fsid_present(inode, cred);
7762 if (status != -NFS4ERR_DELAY)
7764 nfs4_handle_exception(server, status, &exception);
7765 } while (exception.retry);
7770 * If 'use_integrity' is true and the state managment nfs_client
7771 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7772 * and the machine credential as per RFC3530bis and RFC5661 Security
7773 * Considerations sections. Otherwise, just use the user cred with the
7774 * filesystem's rpc_client.
7776 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7779 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7780 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
7781 struct nfs4_secinfo_arg args = {
7782 .dir_fh = NFS_FH(dir),
7785 struct nfs4_secinfo_res res = {
7788 struct rpc_message msg = {
7789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7793 struct nfs4_call_sync_data data = {
7794 .seq_server = NFS_SERVER(dir),
7795 .seq_args = &args.seq_args,
7796 .seq_res = &res.seq_res,
7798 struct rpc_task_setup task_setup = {
7800 .rpc_message = &msg,
7801 .callback_ops = clp->cl_mvops->call_sync_ops,
7802 .callback_data = &data,
7803 .flags = RPC_TASK_NO_ROUND_ROBIN,
7805 const struct cred *cred = NULL;
7807 if (use_integrity) {
7808 clnt = clp->cl_rpcclient;
7809 task_setup.rpc_client = clnt;
7811 cred = nfs4_get_clid_cred(clp);
7812 msg.rpc_cred = cred;
7815 dprintk("NFS call secinfo %s\n", name->name);
7817 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7818 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
7819 status = nfs4_call_sync_custom(&task_setup);
7821 dprintk("NFS reply secinfo: %d\n", status);
7827 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7828 struct nfs4_secinfo_flavors *flavors)
7830 struct nfs4_exception exception = {
7831 .interruptible = true,
7835 err = -NFS4ERR_WRONGSEC;
7837 /* try to use integrity protection with machine cred */
7838 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7839 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7842 * if unable to use integrity protection, or SECINFO with
7843 * integrity protection returns NFS4ERR_WRONGSEC (which is
7844 * disallowed by spec, but exists in deployed servers) use
7845 * the current filesystem's rpc_client and the user cred.
7847 if (err == -NFS4ERR_WRONGSEC)
7848 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7850 trace_nfs4_secinfo(dir, name, err);
7851 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7853 } while (exception.retry);
7857 #ifdef CONFIG_NFS_V4_1
7859 * Check the exchange flags returned by the server for invalid flags, having
7860 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7863 static int nfs4_check_cl_exchange_flags(u32 flags)
7865 if (flags & ~EXCHGID4_FLAG_MASK_R)
7867 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7868 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7870 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7874 return -NFS4ERR_INVAL;
7878 nfs41_same_server_scope(struct nfs41_server_scope *a,
7879 struct nfs41_server_scope *b)
7881 if (a->server_scope_sz != b->server_scope_sz)
7883 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7887 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7889 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
7890 struct nfs_client *clp = args->client;
7892 switch (task->tk_status) {
7893 case -NFS4ERR_BADSESSION:
7894 case -NFS4ERR_DEADSESSION:
7895 nfs4_schedule_session_recovery(clp->cl_session,
7900 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7901 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7905 * nfs4_proc_bind_one_conn_to_session()
7907 * The 4.1 client currently uses the same TCP connection for the
7908 * fore and backchannel.
7911 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7912 struct rpc_xprt *xprt,
7913 struct nfs_client *clp,
7914 const struct cred *cred)
7917 struct nfs41_bind_conn_to_session_args args = {
7919 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7921 struct nfs41_bind_conn_to_session_res res;
7922 struct rpc_message msg = {
7924 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7929 struct rpc_task_setup task_setup_data = {
7932 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7933 .rpc_message = &msg,
7934 .flags = RPC_TASK_TIMEOUT,
7936 struct rpc_task *task;
7938 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7939 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7940 args.dir = NFS4_CDFC4_FORE;
7942 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7943 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7944 args.dir = NFS4_CDFC4_FORE;
7946 task = rpc_run_task(&task_setup_data);
7947 if (!IS_ERR(task)) {
7948 status = task->tk_status;
7951 status = PTR_ERR(task);
7952 trace_nfs4_bind_conn_to_session(clp, status);
7954 if (memcmp(res.sessionid.data,
7955 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7956 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7959 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7960 dprintk("NFS: %s: Unexpected direction from server\n",
7964 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7965 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7974 struct rpc_bind_conn_calldata {
7975 struct nfs_client *clp;
7976 const struct cred *cred;
7980 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7981 struct rpc_xprt *xprt,
7984 struct rpc_bind_conn_calldata *p = calldata;
7986 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7989 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
7991 struct rpc_bind_conn_calldata data = {
7995 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7996 nfs4_proc_bind_conn_to_session_callback, &data);
8000 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8001 * and operations we'd like to see to enable certain features in the allow map
8003 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8004 .how = SP4_MACH_CRED,
8005 .enforce.u.words = {
8006 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8007 1 << (OP_EXCHANGE_ID - 32) |
8008 1 << (OP_CREATE_SESSION - 32) |
8009 1 << (OP_DESTROY_SESSION - 32) |
8010 1 << (OP_DESTROY_CLIENTID - 32)
8013 [0] = 1 << (OP_CLOSE) |
8014 1 << (OP_OPEN_DOWNGRADE) |
8016 1 << (OP_DELEGRETURN) |
8018 [1] = 1 << (OP_SECINFO - 32) |
8019 1 << (OP_SECINFO_NO_NAME - 32) |
8020 1 << (OP_LAYOUTRETURN - 32) |
8021 1 << (OP_TEST_STATEID - 32) |
8022 1 << (OP_FREE_STATEID - 32) |
8023 1 << (OP_WRITE - 32)
8028 * Select the state protection mode for client `clp' given the server results
8029 * from exchange_id in `sp'.
8031 * Returns 0 on success, negative errno otherwise.
8033 static int nfs4_sp4_select_mode(struct nfs_client *clp,
8034 struct nfs41_state_protection *sp)
8036 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8037 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8038 1 << (OP_EXCHANGE_ID - 32) |
8039 1 << (OP_CREATE_SESSION - 32) |
8040 1 << (OP_DESTROY_SESSION - 32) |
8041 1 << (OP_DESTROY_CLIENTID - 32)
8043 unsigned long flags = 0;
8047 if (sp->how == SP4_MACH_CRED) {
8048 /* Print state protect result */
8049 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8050 for (i = 0; i <= LAST_NFS4_OP; i++) {
8051 if (test_bit(i, sp->enforce.u.longs))
8052 dfprintk(MOUNT, " enforce op %d\n", i);
8053 if (test_bit(i, sp->allow.u.longs))
8054 dfprintk(MOUNT, " allow op %d\n", i);
8057 /* make sure nothing is on enforce list that isn't supported */
8058 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8059 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8060 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8067 * Minimal mode - state operations are allowed to use machine
8068 * credential. Note this already happens by default, so the
8069 * client doesn't have to do anything more than the negotiation.
8071 * NOTE: we don't care if EXCHANGE_ID is in the list -
8072 * we're already using the machine cred for exchange_id
8073 * and will never use a different cred.
8075 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8076 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8077 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8078 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8079 dfprintk(MOUNT, "sp4_mach_cred:\n");
8080 dfprintk(MOUNT, " minimal mode enabled\n");
8081 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
8083 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8088 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
8089 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8090 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
8091 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8092 dfprintk(MOUNT, " cleanup mode enabled\n");
8093 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
8096 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8097 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
8098 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
8101 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8102 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8103 dfprintk(MOUNT, " secinfo mode enabled\n");
8104 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8107 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8108 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8109 dfprintk(MOUNT, " stateid mode enabled\n");
8110 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
8113 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8114 dfprintk(MOUNT, " write mode enabled\n");
8115 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8118 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8119 dfprintk(MOUNT, " commit mode enabled\n");
8120 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8124 clp->cl_sp4_flags = flags;
8128 struct nfs41_exchange_id_data {
8129 struct nfs41_exchange_id_res res;
8130 struct nfs41_exchange_id_args args;
8133 static void nfs4_exchange_id_release(void *data)
8135 struct nfs41_exchange_id_data *cdata =
8136 (struct nfs41_exchange_id_data *)data;
8138 nfs_put_client(cdata->args.client);
8139 kfree(cdata->res.impl_id);
8140 kfree(cdata->res.server_scope);
8141 kfree(cdata->res.server_owner);
8145 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8146 .rpc_release = nfs4_exchange_id_release,
8150 * _nfs4_proc_exchange_id()
8152 * Wrapper for EXCHANGE_ID operation.
8154 static struct rpc_task *
8155 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
8156 u32 sp4_how, struct rpc_xprt *xprt)
8158 struct rpc_message msg = {
8159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
8162 struct rpc_task_setup task_setup_data = {
8163 .rpc_client = clp->cl_rpcclient,
8164 .callback_ops = &nfs4_exchange_id_call_ops,
8165 .rpc_message = &msg,
8166 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8168 struct nfs41_exchange_id_data *calldata;
8171 if (!refcount_inc_not_zero(&clp->cl_count))
8172 return ERR_PTR(-EIO);
8175 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8179 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
8181 status = nfs4_init_uniform_client_string(clp);
8185 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8188 if (unlikely(calldata->res.server_owner == NULL))
8191 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
8193 if (unlikely(calldata->res.server_scope == NULL))
8194 goto out_server_owner;
8196 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8197 if (unlikely(calldata->res.impl_id == NULL))
8198 goto out_server_scope;
8202 calldata->args.state_protect.how = SP4_NONE;
8206 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
8216 task_setup_data.rpc_xprt = xprt;
8217 task_setup_data.flags |= RPC_TASK_SOFTCONN;
8218 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8219 sizeof(calldata->args.verifier.data));
8221 calldata->args.client = clp;
8222 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
8223 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8224 #ifdef CONFIG_NFS_V4_1_MIGRATION
8225 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8227 msg.rpc_argp = &calldata->args;
8228 msg.rpc_resp = &calldata->res;
8229 task_setup_data.callback_data = calldata;
8231 return rpc_run_task(&task_setup_data);
8234 kfree(calldata->res.impl_id);
8236 kfree(calldata->res.server_scope);
8238 kfree(calldata->res.server_owner);
8242 nfs_put_client(clp);
8243 return ERR_PTR(status);
8247 * _nfs4_proc_exchange_id()
8249 * Wrapper for EXCHANGE_ID operation.
8251 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
8254 struct rpc_task *task;
8255 struct nfs41_exchange_id_args *argp;
8256 struct nfs41_exchange_id_res *resp;
8257 unsigned long now = jiffies;
8260 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8262 return PTR_ERR(task);
8264 argp = task->tk_msg.rpc_argp;
8265 resp = task->tk_msg.rpc_resp;
8266 status = task->tk_status;
8270 status = nfs4_check_cl_exchange_flags(resp->flags);
8274 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8278 do_renew_lease(clp, now);
8280 clp->cl_clientid = resp->clientid;
8281 clp->cl_exchange_flags = resp->flags;
8282 clp->cl_seqid = resp->seqid;
8283 /* Client ID is not confirmed */
8284 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8285 clear_bit(NFS4_SESSION_ESTABLISHED,
8286 &clp->cl_session->session_state);
8288 if (clp->cl_serverscope != NULL &&
8289 !nfs41_same_server_scope(clp->cl_serverscope,
8290 resp->server_scope)) {
8291 dprintk("%s: server_scope mismatch detected\n",
8293 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8296 swap(clp->cl_serverowner, resp->server_owner);
8297 swap(clp->cl_serverscope, resp->server_scope);
8298 swap(clp->cl_implid, resp->impl_id);
8300 /* Save the EXCHANGE_ID verifier session trunk tests */
8301 memcpy(clp->cl_confirm.data, argp->verifier.data,
8302 sizeof(clp->cl_confirm.data));
8304 trace_nfs4_exchange_id(clp, status);
8310 * nfs4_proc_exchange_id()
8312 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8314 * Since the clientid has expired, all compounds using sessions
8315 * associated with the stale clientid will be returning
8316 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8317 * be in some phase of session reset.
8319 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8321 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
8323 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8326 /* try SP4_MACH_CRED if krb5i/p */
8327 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8328 authflavor == RPC_AUTH_GSS_KRB5P) {
8329 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
8335 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
8339 * nfs4_test_session_trunk
8341 * This is an add_xprt_test() test function called from
8342 * rpc_clnt_setup_test_and_add_xprt.
8344 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8345 * and is dereferrenced in nfs4_exchange_id_release
8347 * Upon success, add the new transport to the rpc_clnt
8349 * @clnt: struct rpc_clnt to get new transport
8350 * @xprt: the rpc_xprt to test
8351 * @data: call data for _nfs4_proc_exchange_id.
8353 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
8356 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
8357 struct rpc_task *task;
8362 dprintk("--> %s try %s\n", __func__,
8363 xprt->address_strings[RPC_DISPLAY_ADDR]);
8365 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8367 /* Test connection for session trunking. Async exchange_id call */
8368 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8372 status = task->tk_status;
8374 status = nfs4_detect_session_trunking(adata->clp,
8375 task->tk_msg.rpc_resp, xprt);
8378 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8382 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
8384 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
8385 const struct cred *cred)
8387 struct rpc_message msg = {
8388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8394 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8395 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8396 trace_nfs4_destroy_clientid(clp, status);
8398 dprintk("NFS: Got error %d from the server %s on "
8399 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8403 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
8404 const struct cred *cred)
8409 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8410 ret = _nfs4_proc_destroy_clientid(clp, cred);
8412 case -NFS4ERR_DELAY:
8413 case -NFS4ERR_CLIENTID_BUSY:
8423 int nfs4_destroy_clientid(struct nfs_client *clp)
8425 const struct cred *cred;
8428 if (clp->cl_mvops->minor_version < 1)
8430 if (clp->cl_exchange_flags == 0)
8432 if (clp->cl_preserve_clid)
8434 cred = nfs4_get_clid_cred(clp);
8435 ret = nfs4_proc_destroy_clientid(clp, cred);
8439 case -NFS4ERR_STALE_CLIENTID:
8440 clp->cl_exchange_flags = 0;
8446 #endif /* CONFIG_NFS_V4_1 */
8448 struct nfs4_get_lease_time_data {
8449 struct nfs4_get_lease_time_args *args;
8450 struct nfs4_get_lease_time_res *res;
8451 struct nfs_client *clp;
8454 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8457 struct nfs4_get_lease_time_data *data =
8458 (struct nfs4_get_lease_time_data *)calldata;
8460 dprintk("--> %s\n", __func__);
8461 /* just setup sequence, do not trigger session recovery
8462 since we're invoked within one */
8463 nfs4_setup_sequence(data->clp,
8464 &data->args->la_seq_args,
8465 &data->res->lr_seq_res,
8467 dprintk("<-- %s\n", __func__);
8471 * Called from nfs4_state_manager thread for session setup, so don't recover
8472 * from sequence operation or clientid errors.
8474 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8476 struct nfs4_get_lease_time_data *data =
8477 (struct nfs4_get_lease_time_data *)calldata;
8479 dprintk("--> %s\n", __func__);
8480 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
8482 switch (task->tk_status) {
8483 case -NFS4ERR_DELAY:
8484 case -NFS4ERR_GRACE:
8485 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8486 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8487 task->tk_status = 0;
8489 case -NFS4ERR_RETRY_UNCACHED_REP:
8490 rpc_restart_call_prepare(task);
8493 dprintk("<-- %s\n", __func__);
8496 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
8497 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8498 .rpc_call_done = nfs4_get_lease_time_done,
8501 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8503 struct nfs4_get_lease_time_args args;
8504 struct nfs4_get_lease_time_res res = {
8505 .lr_fsinfo = fsinfo,
8507 struct nfs4_get_lease_time_data data = {
8512 struct rpc_message msg = {
8513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8517 struct rpc_task_setup task_setup = {
8518 .rpc_client = clp->cl_rpcclient,
8519 .rpc_message = &msg,
8520 .callback_ops = &nfs4_get_lease_time_ops,
8521 .callback_data = &data,
8522 .flags = RPC_TASK_TIMEOUT,
8525 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
8526 return nfs4_call_sync_custom(&task_setup);
8529 #ifdef CONFIG_NFS_V4_1
8532 * Initialize the values to be used by the client in CREATE_SESSION
8533 * If nfs4_init_session set the fore channel request and response sizes,
8536 * Set the back channel max_resp_sz_cached to zero to force the client to
8537 * always set csa_cachethis to FALSE because the current implementation
8538 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8540 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8541 struct rpc_clnt *clnt)
8543 unsigned int max_rqst_sz, max_resp_sz;
8544 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
8545 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
8547 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8548 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
8550 /* Fore channel attributes */
8551 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8552 args->fc_attrs.max_resp_sz = max_resp_sz;
8553 args->fc_attrs.max_ops = NFS4_MAX_OPS;
8554 args->fc_attrs.max_reqs = max_session_slots;
8556 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8557 "max_ops=%u max_reqs=%u\n",
8559 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8560 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
8562 /* Back channel attributes */
8563 args->bc_attrs.max_rqst_sz = max_bc_payload;
8564 args->bc_attrs.max_resp_sz = max_bc_payload;
8565 args->bc_attrs.max_resp_sz_cached = 0;
8566 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
8567 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
8568 if (args->bc_attrs.max_reqs > max_bc_slots)
8569 args->bc_attrs.max_reqs = max_bc_slots;
8571 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8572 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8574 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8575 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8576 args->bc_attrs.max_reqs);
8579 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8580 struct nfs41_create_session_res *res)
8582 struct nfs4_channel_attrs *sent = &args->fc_attrs;
8583 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
8585 if (rcvd->max_resp_sz > sent->max_resp_sz)
8588 * Our requested max_ops is the minimum we need; we're not
8589 * prepared to break up compounds into smaller pieces than that.
8590 * So, no point even trying to continue if the server won't
8593 if (rcvd->max_ops < sent->max_ops)
8595 if (rcvd->max_reqs == 0)
8597 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8598 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
8602 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8603 struct nfs41_create_session_res *res)
8605 struct nfs4_channel_attrs *sent = &args->bc_attrs;
8606 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8608 if (!(res->flags & SESSION4_BACK_CHAN))
8610 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8612 if (rcvd->max_resp_sz < sent->max_resp_sz)
8614 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8616 if (rcvd->max_ops > sent->max_ops)
8618 if (rcvd->max_reqs > sent->max_reqs)
8624 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8625 struct nfs41_create_session_res *res)
8629 ret = nfs4_verify_fore_channel_attrs(args, res);
8632 return nfs4_verify_back_channel_attrs(args, res);
8635 static void nfs4_update_session(struct nfs4_session *session,
8636 struct nfs41_create_session_res *res)
8638 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8639 /* Mark client id and session as being confirmed */
8640 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8641 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8642 session->flags = res->flags;
8643 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8644 if (res->flags & SESSION4_BACK_CHAN)
8645 memcpy(&session->bc_attrs, &res->bc_attrs,
8646 sizeof(session->bc_attrs));
8649 static int _nfs4_proc_create_session(struct nfs_client *clp,
8650 const struct cred *cred)
8652 struct nfs4_session *session = clp->cl_session;
8653 struct nfs41_create_session_args args = {
8655 .clientid = clp->cl_clientid,
8656 .seqid = clp->cl_seqid,
8657 .cb_program = NFS4_CALLBACK,
8659 struct nfs41_create_session_res res;
8661 struct rpc_message msg = {
8662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8669 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8670 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8672 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8673 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8674 trace_nfs4_create_session(clp, status);
8677 case -NFS4ERR_STALE_CLIENTID:
8678 case -NFS4ERR_DELAY:
8687 /* Verify the session's negotiated channel_attrs values */
8688 status = nfs4_verify_channel_attrs(&args, &res);
8689 /* Increment the clientid slot sequence id */
8692 nfs4_update_session(session, &res);
8699 * Issues a CREATE_SESSION operation to the server.
8700 * It is the responsibility of the caller to verify the session is
8701 * expired before calling this routine.
8703 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
8707 struct nfs4_session *session = clp->cl_session;
8709 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8711 status = _nfs4_proc_create_session(clp, cred);
8715 /* Init or reset the session slot tables */
8716 status = nfs4_setup_session_slot_tables(session);
8717 dprintk("slot table setup returned %d\n", status);
8721 ptr = (unsigned *)&session->sess_id.data[0];
8722 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8723 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
8725 dprintk("<-- %s\n", __func__);
8730 * Issue the over-the-wire RPC DESTROY_SESSION.
8731 * The caller must serialize access to this routine.
8733 int nfs4_proc_destroy_session(struct nfs4_session *session,
8734 const struct cred *cred)
8736 struct rpc_message msg = {
8737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8738 .rpc_argp = session,
8743 dprintk("--> nfs4_proc_destroy_session\n");
8745 /* session is still being setup */
8746 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8749 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8750 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
8751 trace_nfs4_destroy_session(session->clp, status);
8754 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8755 "Session has been destroyed regardless...\n", status);
8757 dprintk("<-- nfs4_proc_destroy_session\n");
8762 * Renew the cl_session lease.
8764 struct nfs4_sequence_data {
8765 struct nfs_client *clp;
8766 struct nfs4_sequence_args args;
8767 struct nfs4_sequence_res res;
8770 static void nfs41_sequence_release(void *data)
8772 struct nfs4_sequence_data *calldata = data;
8773 struct nfs_client *clp = calldata->clp;
8775 if (refcount_read(&clp->cl_count) > 1)
8776 nfs4_schedule_state_renewal(clp);
8777 nfs_put_client(clp);
8781 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8783 switch(task->tk_status) {
8784 case -NFS4ERR_DELAY:
8785 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8788 nfs4_schedule_lease_recovery(clp);
8793 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8795 struct nfs4_sequence_data *calldata = data;
8796 struct nfs_client *clp = calldata->clp;
8798 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8801 trace_nfs4_sequence(clp, task->tk_status);
8802 if (task->tk_status < 0) {
8803 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8804 if (refcount_read(&clp->cl_count) == 1)
8807 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8808 rpc_restart_call_prepare(task);
8812 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8814 dprintk("<-- %s\n", __func__);
8817 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8819 struct nfs4_sequence_data *calldata = data;
8820 struct nfs_client *clp = calldata->clp;
8821 struct nfs4_sequence_args *args;
8822 struct nfs4_sequence_res *res;
8824 args = task->tk_msg.rpc_argp;
8825 res = task->tk_msg.rpc_resp;
8827 nfs4_setup_sequence(clp, args, res, task);
8830 static const struct rpc_call_ops nfs41_sequence_ops = {
8831 .rpc_call_done = nfs41_sequence_call_done,
8832 .rpc_call_prepare = nfs41_sequence_prepare,
8833 .rpc_release = nfs41_sequence_release,
8836 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8837 const struct cred *cred,
8838 struct nfs4_slot *slot,
8841 struct nfs4_sequence_data *calldata;
8842 struct rpc_message msg = {
8843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8846 struct rpc_task_setup task_setup_data = {
8847 .rpc_client = clp->cl_rpcclient,
8848 .rpc_message = &msg,
8849 .callback_ops = &nfs41_sequence_ops,
8850 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8852 struct rpc_task *ret;
8854 ret = ERR_PTR(-EIO);
8855 if (!refcount_inc_not_zero(&clp->cl_count))
8858 ret = ERR_PTR(-ENOMEM);
8859 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8860 if (calldata == NULL)
8862 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
8863 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
8864 msg.rpc_argp = &calldata->args;
8865 msg.rpc_resp = &calldata->res;
8866 calldata->clp = clp;
8867 task_setup_data.callback_data = calldata;
8869 ret = rpc_run_task(&task_setup_data);
8874 nfs_put_client(clp);
8876 nfs41_release_slot(slot);
8880 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
8882 struct rpc_task *task;
8885 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8887 task = _nfs41_proc_sequence(clp, cred, NULL, false);
8889 ret = PTR_ERR(task);
8891 rpc_put_task_async(task);
8892 dprintk("<-- %s status=%d\n", __func__, ret);
8896 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
8898 struct rpc_task *task;
8901 task = _nfs41_proc_sequence(clp, cred, NULL, true);
8903 ret = PTR_ERR(task);
8906 ret = rpc_wait_for_completion_task(task);
8908 ret = task->tk_status;
8911 dprintk("<-- %s status=%d\n", __func__, ret);
8915 struct nfs4_reclaim_complete_data {
8916 struct nfs_client *clp;
8917 struct nfs41_reclaim_complete_args arg;
8918 struct nfs41_reclaim_complete_res res;
8921 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8923 struct nfs4_reclaim_complete_data *calldata = data;
8925 nfs4_setup_sequence(calldata->clp,
8926 &calldata->arg.seq_args,
8927 &calldata->res.seq_res,
8931 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8933 switch(task->tk_status) {
8935 wake_up_all(&clp->cl_lock_waitq);
8937 case -NFS4ERR_COMPLETE_ALREADY:
8938 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8940 case -NFS4ERR_DELAY:
8941 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8943 case -NFS4ERR_RETRY_UNCACHED_REP:
8945 case -NFS4ERR_BADSESSION:
8946 case -NFS4ERR_DEADSESSION:
8947 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8950 nfs4_schedule_lease_recovery(clp);
8955 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8957 struct nfs4_reclaim_complete_data *calldata = data;
8958 struct nfs_client *clp = calldata->clp;
8959 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8961 dprintk("--> %s\n", __func__);
8962 if (!nfs41_sequence_done(task, res))
8965 trace_nfs4_reclaim_complete(clp, task->tk_status);
8966 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8967 rpc_restart_call_prepare(task);
8970 dprintk("<-- %s\n", __func__);
8973 static void nfs4_free_reclaim_complete_data(void *data)
8975 struct nfs4_reclaim_complete_data *calldata = data;
8980 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8981 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8982 .rpc_call_done = nfs4_reclaim_complete_done,
8983 .rpc_release = nfs4_free_reclaim_complete_data,
8987 * Issue a global reclaim complete.
8989 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8990 const struct cred *cred)
8992 struct nfs4_reclaim_complete_data *calldata;
8993 struct rpc_message msg = {
8994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8997 struct rpc_task_setup task_setup_data = {
8998 .rpc_client = clp->cl_rpcclient,
8999 .rpc_message = &msg,
9000 .callback_ops = &nfs4_reclaim_complete_call_ops,
9001 .flags = RPC_TASK_NO_ROUND_ROBIN,
9003 int status = -ENOMEM;
9005 dprintk("--> %s\n", __func__);
9006 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9007 if (calldata == NULL)
9009 calldata->clp = clp;
9010 calldata->arg.one_fs = 0;
9012 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
9013 msg.rpc_argp = &calldata->arg;
9014 msg.rpc_resp = &calldata->res;
9015 task_setup_data.callback_data = calldata;
9016 status = nfs4_call_sync_custom(&task_setup_data);
9018 dprintk("<-- %s status=%d\n", __func__, status);
9023 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9025 struct nfs4_layoutget *lgp = calldata;
9026 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
9028 dprintk("--> %s\n", __func__);
9029 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
9030 &lgp->res.seq_res, task);
9031 dprintk("<-- %s\n", __func__);
9034 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9036 struct nfs4_layoutget *lgp = calldata;
9038 dprintk("--> %s\n", __func__);
9039 nfs41_sequence_process(task, &lgp->res.seq_res);
9040 dprintk("<-- %s\n", __func__);
9044 nfs4_layoutget_handle_exception(struct rpc_task *task,
9045 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9047 struct inode *inode = lgp->args.inode;
9048 struct nfs_server *server = NFS_SERVER(inode);
9049 struct pnfs_layout_hdr *lo;
9050 int nfs4err = task->tk_status;
9051 int err, status = 0;
9054 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
9056 nfs4_sequence_free_slot(&lgp->res.seq_res);
9063 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9064 * on the file. set tk_status to -ENODATA to tell upper layer to
9067 case -NFS4ERR_LAYOUTUNAVAILABLE:
9071 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9072 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9074 case -NFS4ERR_BADLAYOUT:
9075 status = -EOVERFLOW;
9078 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
9079 * (or clients) writing to the same RAID stripe except when
9080 * the minlength argument is 0 (see RFC5661 section 18.43.3).
9082 * Treat it like we would RECALLCONFLICT -- we retry for a little
9083 * while, and then eventually give up.
9085 case -NFS4ERR_LAYOUTTRYLATER:
9086 if (lgp->args.minlength == 0) {
9087 status = -EOVERFLOW;
9092 case -NFS4ERR_RECALLCONFLICT:
9093 status = -ERECALLCONFLICT;
9095 case -NFS4ERR_DELEG_REVOKED:
9096 case -NFS4ERR_ADMIN_REVOKED:
9097 case -NFS4ERR_EXPIRED:
9098 case -NFS4ERR_BAD_STATEID:
9099 exception->timeout = 0;
9100 spin_lock(&inode->i_lock);
9101 lo = NFS_I(inode)->layout;
9102 /* If the open stateid was bad, then recover it. */
9103 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
9104 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
9105 spin_unlock(&inode->i_lock);
9106 exception->state = lgp->args.ctx->state;
9107 exception->stateid = &lgp->args.stateid;
9112 * Mark the bad layout state as invalid, then retry
9114 pnfs_mark_layout_stateid_invalid(lo, &head);
9115 spin_unlock(&inode->i_lock);
9116 nfs_commit_inode(inode, 0);
9117 pnfs_free_lseg_list(&head);
9122 err = nfs4_handle_exception(server, nfs4err, exception);
9124 if (exception->retry)
9130 dprintk("<-- %s\n", __func__);
9134 size_t max_response_pages(struct nfs_server *server)
9136 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9137 return nfs_page_array_len(0, max_resp_sz);
9140 static void nfs4_layoutget_release(void *calldata)
9142 struct nfs4_layoutget *lgp = calldata;
9144 dprintk("--> %s\n", __func__);
9145 nfs4_sequence_free_slot(&lgp->res.seq_res);
9146 pnfs_layoutget_free(lgp);
9147 dprintk("<-- %s\n", __func__);
9150 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9151 .rpc_call_prepare = nfs4_layoutget_prepare,
9152 .rpc_call_done = nfs4_layoutget_done,
9153 .rpc_release = nfs4_layoutget_release,
9156 struct pnfs_layout_segment *
9157 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
9159 struct inode *inode = lgp->args.inode;
9160 struct nfs_server *server = NFS_SERVER(inode);
9161 struct rpc_task *task;
9162 struct rpc_message msg = {
9163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9164 .rpc_argp = &lgp->args,
9165 .rpc_resp = &lgp->res,
9166 .rpc_cred = lgp->cred,
9168 struct rpc_task_setup task_setup_data = {
9169 .rpc_client = server->client,
9170 .rpc_message = &msg,
9171 .callback_ops = &nfs4_layoutget_call_ops,
9172 .callback_data = lgp,
9173 .flags = RPC_TASK_ASYNC,
9175 struct pnfs_layout_segment *lseg = NULL;
9176 struct nfs4_exception exception = {
9178 .timeout = *timeout,
9182 dprintk("--> %s\n", __func__);
9184 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
9185 pnfs_get_layout_hdr(NFS_I(inode)->layout);
9187 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
9189 task = rpc_run_task(&task_setup_data);
9191 return ERR_CAST(task);
9192 status = rpc_wait_for_completion_task(task);
9196 if (task->tk_status < 0) {
9197 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9198 *timeout = exception.timeout;
9199 } else if (lgp->res.layoutp->len == 0) {
9201 *timeout = nfs4_update_delay(&exception.timeout);
9203 lseg = pnfs_layout_process(lgp);
9205 trace_nfs4_layoutget(lgp->args.ctx,
9212 dprintk("<-- %s status=%d\n", __func__, status);
9214 return ERR_PTR(status);
9219 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9221 struct nfs4_layoutreturn *lrp = calldata;
9223 dprintk("--> %s\n", __func__);
9224 nfs4_setup_sequence(lrp->clp,
9225 &lrp->args.seq_args,
9228 if (!pnfs_layout_is_valid(lrp->args.layout))
9232 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9234 struct nfs4_layoutreturn *lrp = calldata;
9235 struct nfs_server *server;
9237 dprintk("--> %s\n", __func__);
9239 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
9243 * Was there an RPC level error? Assume the call succeeded,
9244 * and that we need to release the layout
9246 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9247 lrp->res.lrs_present = 0;
9251 server = NFS_SERVER(lrp->args.inode);
9252 switch (task->tk_status) {
9253 case -NFS4ERR_OLD_STATEID:
9254 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
9260 task->tk_status = 0;
9264 case -NFS4ERR_DELAY:
9265 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
9269 dprintk("<-- %s\n", __func__);
9272 task->tk_status = 0;
9273 nfs4_sequence_free_slot(&lrp->res.seq_res);
9274 rpc_restart_call_prepare(task);
9277 static void nfs4_layoutreturn_release(void *calldata)
9279 struct nfs4_layoutreturn *lrp = calldata;
9280 struct pnfs_layout_hdr *lo = lrp->args.layout;
9282 dprintk("--> %s\n", __func__);
9283 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
9284 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
9285 nfs4_sequence_free_slot(&lrp->res.seq_res);
9286 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9287 lrp->ld_private.ops->free(&lrp->ld_private);
9288 pnfs_put_layout_hdr(lrp->args.layout);
9289 nfs_iput_and_deactive(lrp->inode);
9291 dprintk("<-- %s\n", __func__);
9294 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9295 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9296 .rpc_call_done = nfs4_layoutreturn_done,
9297 .rpc_release = nfs4_layoutreturn_release,
9300 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
9302 struct rpc_task *task;
9303 struct rpc_message msg = {
9304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9305 .rpc_argp = &lrp->args,
9306 .rpc_resp = &lrp->res,
9307 .rpc_cred = lrp->cred,
9309 struct rpc_task_setup task_setup_data = {
9310 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
9311 .rpc_message = &msg,
9312 .callback_ops = &nfs4_layoutreturn_call_ops,
9313 .callback_data = lrp,
9317 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9318 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9319 &task_setup_data.rpc_client, &msg);
9321 dprintk("--> %s\n", __func__);
9323 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9325 nfs4_layoutreturn_release(lrp);
9328 task_setup_data.flags |= RPC_TASK_ASYNC;
9330 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
9331 task = rpc_run_task(&task_setup_data);
9333 return PTR_ERR(task);
9335 status = task->tk_status;
9336 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
9337 dprintk("<-- %s status=%d\n", __func__, status);
9343 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
9344 struct pnfs_device *pdev,
9345 const struct cred *cred)
9347 struct nfs4_getdeviceinfo_args args = {
9349 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9350 NOTIFY_DEVICEID4_DELETE,
9352 struct nfs4_getdeviceinfo_res res = {
9355 struct rpc_message msg = {
9356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9363 dprintk("--> %s\n", __func__);
9364 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
9365 if (res.notification & ~args.notify_types)
9366 dprintk("%s: unsupported notification\n", __func__);
9367 if (res.notification != args.notify_types)
9370 dprintk("<-- %s status=%d\n", __func__, status);
9375 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9376 struct pnfs_device *pdev,
9377 const struct cred *cred)
9379 struct nfs4_exception exception = { };
9383 err = nfs4_handle_exception(server,
9384 _nfs4_proc_getdeviceinfo(server, pdev, cred),
9386 } while (exception.retry);
9389 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9391 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9393 struct nfs4_layoutcommit_data *data = calldata;
9394 struct nfs_server *server = NFS_SERVER(data->args.inode);
9396 nfs4_setup_sequence(server->nfs_client,
9397 &data->args.seq_args,
9403 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9405 struct nfs4_layoutcommit_data *data = calldata;
9406 struct nfs_server *server = NFS_SERVER(data->args.inode);
9408 if (!nfs41_sequence_done(task, &data->res.seq_res))
9411 switch (task->tk_status) { /* Just ignore these failures */
9412 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9413 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9414 case -NFS4ERR_BADLAYOUT: /* no layout */
9415 case -NFS4ERR_GRACE: /* loca_recalim always false */
9416 task->tk_status = 0;
9420 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
9421 rpc_restart_call_prepare(task);
9427 static void nfs4_layoutcommit_release(void *calldata)
9429 struct nfs4_layoutcommit_data *data = calldata;
9431 pnfs_cleanup_layoutcommit(data);
9432 nfs_post_op_update_inode_force_wcc(data->args.inode,
9434 put_cred(data->cred);
9435 nfs_iput_and_deactive(data->inode);
9439 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9440 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9441 .rpc_call_done = nfs4_layoutcommit_done,
9442 .rpc_release = nfs4_layoutcommit_release,
9446 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
9448 struct rpc_message msg = {
9449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9450 .rpc_argp = &data->args,
9451 .rpc_resp = &data->res,
9452 .rpc_cred = data->cred,
9454 struct rpc_task_setup task_setup_data = {
9455 .task = &data->task,
9456 .rpc_client = NFS_CLIENT(data->args.inode),
9457 .rpc_message = &msg,
9458 .callback_ops = &nfs4_layoutcommit_ops,
9459 .callback_data = data,
9461 struct rpc_task *task;
9464 dprintk("NFS: initiating layoutcommit call. sync %d "
9465 "lbw: %llu inode %lu\n", sync,
9466 data->args.lastbytewritten,
9467 data->args.inode->i_ino);
9470 data->inode = nfs_igrab_and_active(data->args.inode);
9471 if (data->inode == NULL) {
9472 nfs4_layoutcommit_release(data);
9475 task_setup_data.flags = RPC_TASK_ASYNC;
9477 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
9478 task = rpc_run_task(&task_setup_data);
9480 return PTR_ERR(task);
9482 status = task->tk_status;
9483 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
9484 dprintk("%s: status %d\n", __func__, status);
9490 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9491 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9494 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9495 struct nfs_fsinfo *info,
9496 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
9498 struct nfs41_secinfo_no_name_args args = {
9499 .style = SECINFO_STYLE_CURRENT_FH,
9501 struct nfs4_secinfo_res res = {
9504 struct rpc_message msg = {
9505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9509 struct rpc_clnt *clnt = server->client;
9510 struct nfs4_call_sync_data data = {
9511 .seq_server = server,
9512 .seq_args = &args.seq_args,
9513 .seq_res = &res.seq_res,
9515 struct rpc_task_setup task_setup = {
9516 .rpc_client = server->client,
9517 .rpc_message = &msg,
9518 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9519 .callback_data = &data,
9520 .flags = RPC_TASK_NO_ROUND_ROBIN,
9522 const struct cred *cred = NULL;
9525 if (use_integrity) {
9526 clnt = server->nfs_client->cl_rpcclient;
9527 task_setup.rpc_client = clnt;
9529 cred = nfs4_get_clid_cred(server->nfs_client);
9530 msg.rpc_cred = cred;
9533 dprintk("--> %s\n", __func__);
9534 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
9535 status = nfs4_call_sync_custom(&task_setup);
9536 dprintk("<-- %s status=%d\n", __func__, status);
9544 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9545 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9547 struct nfs4_exception exception = {
9548 .interruptible = true,
9552 /* first try using integrity protection */
9553 err = -NFS4ERR_WRONGSEC;
9555 /* try to use integrity protection with machine cred */
9556 if (_nfs4_is_integrity_protected(server->nfs_client))
9557 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9561 * if unable to use integrity protection, or SECINFO with
9562 * integrity protection returns NFS4ERR_WRONGSEC (which is
9563 * disallowed by spec, but exists in deployed servers) use
9564 * the current filesystem's rpc_client and the user cred.
9566 if (err == -NFS4ERR_WRONGSEC)
9567 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9572 case -NFS4ERR_WRONGSEC:
9576 err = nfs4_handle_exception(server, err, &exception);
9578 } while (exception.retry);
9584 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9585 struct nfs_fsinfo *info)
9589 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
9590 struct nfs4_secinfo_flavors *flavors;
9591 struct nfs4_secinfo4 *secinfo;
9594 page = alloc_page(GFP_KERNEL);
9600 flavors = page_address(page);
9601 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9604 * Fall back on "guess and check" method if
9605 * the server doesn't support SECINFO_NO_NAME
9607 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
9608 err = nfs4_find_root_sec(server, fhandle, info);
9614 for (i = 0; i < flavors->num_flavors; i++) {
9615 secinfo = &flavors->flavors[i];
9617 switch (secinfo->flavor) {
9621 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9622 &secinfo->flavor_info);
9625 flavor = RPC_AUTH_MAXFLAVOR;
9629 if (!nfs_auth_info_match(&server->auth_info, flavor))
9630 flavor = RPC_AUTH_MAXFLAVOR;
9632 if (flavor != RPC_AUTH_MAXFLAVOR) {
9633 err = nfs4_lookup_root_sec(server, fhandle,
9640 if (flavor == RPC_AUTH_MAXFLAVOR)
9651 static int _nfs41_test_stateid(struct nfs_server *server,
9652 nfs4_stateid *stateid,
9653 const struct cred *cred)
9656 struct nfs41_test_stateid_args args = {
9659 struct nfs41_test_stateid_res res;
9660 struct rpc_message msg = {
9661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9666 struct rpc_clnt *rpc_client = server->client;
9668 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9671 dprintk("NFS call test_stateid %p\n", stateid);
9672 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
9673 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9674 &args.seq_args, &res.seq_res);
9675 if (status != NFS_OK) {
9676 dprintk("NFS reply test_stateid: failed, %d\n", status);
9679 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9683 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9684 int err, struct nfs4_exception *exception)
9686 exception->retry = 0;
9688 case -NFS4ERR_DELAY:
9689 case -NFS4ERR_RETRY_UNCACHED_REP:
9690 nfs4_handle_exception(server, err, exception);
9692 case -NFS4ERR_BADSESSION:
9693 case -NFS4ERR_BADSLOT:
9694 case -NFS4ERR_BAD_HIGH_SLOT:
9695 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9696 case -NFS4ERR_DEADSESSION:
9697 nfs4_do_handle_exception(server, err, exception);
9702 * nfs41_test_stateid - perform a TEST_STATEID operation
9704 * @server: server / transport on which to perform the operation
9705 * @stateid: state ID to test
9708 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9709 * Otherwise a negative NFS4ERR value is returned if the operation
9710 * failed or the state ID is not currently valid.
9712 static int nfs41_test_stateid(struct nfs_server *server,
9713 nfs4_stateid *stateid,
9714 const struct cred *cred)
9716 struct nfs4_exception exception = {
9717 .interruptible = true,
9721 err = _nfs41_test_stateid(server, stateid, cred);
9722 nfs4_handle_delay_or_session_error(server, err, &exception);
9723 } while (exception.retry);
9727 struct nfs_free_stateid_data {
9728 struct nfs_server *server;
9729 struct nfs41_free_stateid_args args;
9730 struct nfs41_free_stateid_res res;
9733 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9735 struct nfs_free_stateid_data *data = calldata;
9736 nfs4_setup_sequence(data->server->nfs_client,
9737 &data->args.seq_args,
9742 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9744 struct nfs_free_stateid_data *data = calldata;
9746 nfs41_sequence_done(task, &data->res.seq_res);
9748 switch (task->tk_status) {
9749 case -NFS4ERR_DELAY:
9750 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9751 rpc_restart_call_prepare(task);
9755 static void nfs41_free_stateid_release(void *calldata)
9760 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9761 .rpc_call_prepare = nfs41_free_stateid_prepare,
9762 .rpc_call_done = nfs41_free_stateid_done,
9763 .rpc_release = nfs41_free_stateid_release,
9767 * nfs41_free_stateid - perform a FREE_STATEID operation
9769 * @server: server / transport on which to perform the operation
9770 * @stateid: state ID to release
9772 * @privileged: set to true if this call needs to be privileged
9774 * Note: this function is always asynchronous.
9776 static int nfs41_free_stateid(struct nfs_server *server,
9777 const nfs4_stateid *stateid,
9778 const struct cred *cred,
9781 struct rpc_message msg = {
9782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9785 struct rpc_task_setup task_setup = {
9786 .rpc_client = server->client,
9787 .rpc_message = &msg,
9788 .callback_ops = &nfs41_free_stateid_ops,
9789 .flags = RPC_TASK_ASYNC,
9791 struct nfs_free_stateid_data *data;
9792 struct rpc_task *task;
9794 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9795 &task_setup.rpc_client, &msg);
9797 dprintk("NFS call free_stateid %p\n", stateid);
9798 data = kmalloc(sizeof(*data), GFP_NOFS);
9801 data->server = server;
9802 nfs4_stateid_copy(&data->args.stateid, stateid);
9804 task_setup.callback_data = data;
9806 msg.rpc_argp = &data->args;
9807 msg.rpc_resp = &data->res;
9808 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
9809 task = rpc_run_task(&task_setup);
9811 return PTR_ERR(task);
9817 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9819 const struct cred *cred = lsp->ls_state->owner->so_cred;
9821 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9822 nfs4_free_lock_state(server, lsp);
9825 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9826 const nfs4_stateid *s2)
9828 if (s1->type != s2->type)
9831 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9834 if (s1->seqid == s2->seqid)
9837 return s1->seqid == 0 || s2->seqid == 0;
9840 #endif /* CONFIG_NFS_V4_1 */
9842 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9843 const nfs4_stateid *s2)
9845 return nfs4_stateid_match(s1, s2);
9849 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9850 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9851 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9852 .recover_open = nfs4_open_reclaim,
9853 .recover_lock = nfs4_lock_reclaim,
9854 .establish_clid = nfs4_init_clientid,
9855 .detect_trunking = nfs40_discover_server_trunking,
9858 #if defined(CONFIG_NFS_V4_1)
9859 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9860 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9861 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9862 .recover_open = nfs4_open_reclaim,
9863 .recover_lock = nfs4_lock_reclaim,
9864 .establish_clid = nfs41_init_clientid,
9865 .reclaim_complete = nfs41_proc_reclaim_complete,
9866 .detect_trunking = nfs41_discover_server_trunking,
9868 #endif /* CONFIG_NFS_V4_1 */
9870 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9871 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9872 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9873 .recover_open = nfs40_open_expired,
9874 .recover_lock = nfs4_lock_expired,
9875 .establish_clid = nfs4_init_clientid,
9878 #if defined(CONFIG_NFS_V4_1)
9879 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9880 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9881 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9882 .recover_open = nfs41_open_expired,
9883 .recover_lock = nfs41_lock_expired,
9884 .establish_clid = nfs41_init_clientid,
9886 #endif /* CONFIG_NFS_V4_1 */
9888 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9889 .sched_state_renewal = nfs4_proc_async_renew,
9890 .get_state_renewal_cred = nfs4_get_renew_cred,
9891 .renew_lease = nfs4_proc_renew,
9894 #if defined(CONFIG_NFS_V4_1)
9895 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9896 .sched_state_renewal = nfs41_proc_async_sequence,
9897 .get_state_renewal_cred = nfs4_get_machine_cred,
9898 .renew_lease = nfs4_proc_sequence,
9902 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9903 .get_locations = _nfs40_proc_get_locations,
9904 .fsid_present = _nfs40_proc_fsid_present,
9907 #if defined(CONFIG_NFS_V4_1)
9908 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9909 .get_locations = _nfs41_proc_get_locations,
9910 .fsid_present = _nfs41_proc_fsid_present,
9912 #endif /* CONFIG_NFS_V4_1 */
9914 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9916 .init_caps = NFS_CAP_READDIRPLUS
9917 | NFS_CAP_ATOMIC_OPEN
9918 | NFS_CAP_POSIX_LOCK,
9919 .init_client = nfs40_init_client,
9920 .shutdown_client = nfs40_shutdown_client,
9921 .match_stateid = nfs4_match_stateid,
9922 .find_root_sec = nfs4_find_root_sec,
9923 .free_lock_state = nfs4_release_lockowner,
9924 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9925 .alloc_seqid = nfs_alloc_seqid,
9926 .call_sync_ops = &nfs40_call_sync_ops,
9927 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9928 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9929 .state_renewal_ops = &nfs40_state_renewal_ops,
9930 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9933 #if defined(CONFIG_NFS_V4_1)
9934 static struct nfs_seqid *
9935 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9940 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9942 .init_caps = NFS_CAP_READDIRPLUS
9943 | NFS_CAP_ATOMIC_OPEN
9944 | NFS_CAP_POSIX_LOCK
9945 | NFS_CAP_STATEID_NFSV41
9946 | NFS_CAP_ATOMIC_OPEN_V1
9948 .init_client = nfs41_init_client,
9949 .shutdown_client = nfs41_shutdown_client,
9950 .match_stateid = nfs41_match_stateid,
9951 .find_root_sec = nfs41_find_root_sec,
9952 .free_lock_state = nfs41_free_lock_state,
9953 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9954 .alloc_seqid = nfs_alloc_no_seqid,
9955 .session_trunk = nfs4_test_session_trunk,
9956 .call_sync_ops = &nfs41_call_sync_ops,
9957 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9958 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9959 .state_renewal_ops = &nfs41_state_renewal_ops,
9960 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9964 #if defined(CONFIG_NFS_V4_2)
9965 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9967 .init_caps = NFS_CAP_READDIRPLUS
9968 | NFS_CAP_ATOMIC_OPEN
9969 | NFS_CAP_POSIX_LOCK
9970 | NFS_CAP_STATEID_NFSV41
9971 | NFS_CAP_ATOMIC_OPEN_V1
9975 | NFS_CAP_OFFLOAD_CANCEL
9976 | NFS_CAP_COPY_NOTIFY
9977 | NFS_CAP_DEALLOCATE
9979 | NFS_CAP_LAYOUTSTATS
9981 | NFS_CAP_LAYOUTERROR,
9982 .init_client = nfs41_init_client,
9983 .shutdown_client = nfs41_shutdown_client,
9984 .match_stateid = nfs41_match_stateid,
9985 .find_root_sec = nfs41_find_root_sec,
9986 .free_lock_state = nfs41_free_lock_state,
9987 .call_sync_ops = &nfs41_call_sync_ops,
9988 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9989 .alloc_seqid = nfs_alloc_no_seqid,
9990 .session_trunk = nfs4_test_session_trunk,
9991 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9992 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9993 .state_renewal_ops = &nfs41_state_renewal_ops,
9994 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9998 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9999 [0] = &nfs_v4_0_minor_ops,
10000 #if defined(CONFIG_NFS_V4_1)
10001 [1] = &nfs_v4_1_minor_ops,
10003 #if defined(CONFIG_NFS_V4_2)
10004 [2] = &nfs_v4_2_minor_ops,
10008 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
10010 ssize_t error, error2;
10012 error = generic_listxattr(dentry, list, size);
10020 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10023 return error + error2;
10026 static const struct inode_operations nfs4_dir_inode_operations = {
10027 .create = nfs_create,
10028 .lookup = nfs_lookup,
10029 .atomic_open = nfs_atomic_open,
10031 .unlink = nfs_unlink,
10032 .symlink = nfs_symlink,
10033 .mkdir = nfs_mkdir,
10034 .rmdir = nfs_rmdir,
10035 .mknod = nfs_mknod,
10036 .rename = nfs_rename,
10037 .permission = nfs_permission,
10038 .getattr = nfs_getattr,
10039 .setattr = nfs_setattr,
10040 .listxattr = nfs4_listxattr,
10043 static const struct inode_operations nfs4_file_inode_operations = {
10044 .permission = nfs_permission,
10045 .getattr = nfs_getattr,
10046 .setattr = nfs_setattr,
10047 .listxattr = nfs4_listxattr,
10050 const struct nfs_rpc_ops nfs_v4_clientops = {
10051 .version = 4, /* protocol version */
10052 .dentry_ops = &nfs4_dentry_operations,
10053 .dir_inode_ops = &nfs4_dir_inode_operations,
10054 .file_inode_ops = &nfs4_file_inode_operations,
10055 .file_ops = &nfs4_file_operations,
10056 .getroot = nfs4_proc_get_root,
10057 .submount = nfs4_submount,
10058 .try_get_tree = nfs4_try_get_tree,
10059 .getattr = nfs4_proc_getattr,
10060 .setattr = nfs4_proc_setattr,
10061 .lookup = nfs4_proc_lookup,
10062 .lookupp = nfs4_proc_lookupp,
10063 .access = nfs4_proc_access,
10064 .readlink = nfs4_proc_readlink,
10065 .create = nfs4_proc_create,
10066 .remove = nfs4_proc_remove,
10067 .unlink_setup = nfs4_proc_unlink_setup,
10068 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
10069 .unlink_done = nfs4_proc_unlink_done,
10070 .rename_setup = nfs4_proc_rename_setup,
10071 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
10072 .rename_done = nfs4_proc_rename_done,
10073 .link = nfs4_proc_link,
10074 .symlink = nfs4_proc_symlink,
10075 .mkdir = nfs4_proc_mkdir,
10076 .rmdir = nfs4_proc_rmdir,
10077 .readdir = nfs4_proc_readdir,
10078 .mknod = nfs4_proc_mknod,
10079 .statfs = nfs4_proc_statfs,
10080 .fsinfo = nfs4_proc_fsinfo,
10081 .pathconf = nfs4_proc_pathconf,
10082 .set_capabilities = nfs4_server_capabilities,
10083 .decode_dirent = nfs4_decode_dirent,
10084 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
10085 .read_setup = nfs4_proc_read_setup,
10086 .read_done = nfs4_read_done,
10087 .write_setup = nfs4_proc_write_setup,
10088 .write_done = nfs4_write_done,
10089 .commit_setup = nfs4_proc_commit_setup,
10090 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
10091 .commit_done = nfs4_commit_done,
10092 .lock = nfs4_proc_lock,
10093 .clear_acl_cache = nfs4_zap_acl_attr,
10094 .close_context = nfs4_close_context,
10095 .open_context = nfs4_atomic_open,
10096 .have_delegation = nfs4_have_delegation,
10097 .alloc_client = nfs4_alloc_client,
10098 .init_client = nfs4_init_client,
10099 .free_client = nfs4_free_client,
10100 .create_server = nfs4_create_server,
10101 .clone_server = nfs_clone_server,
10104 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
10105 .name = XATTR_NAME_NFSV4_ACL,
10106 .list = nfs4_xattr_list_nfs4_acl,
10107 .get = nfs4_xattr_get_nfs4_acl,
10108 .set = nfs4_xattr_set_nfs4_acl,
10111 const struct xattr_handler *nfs4_xattr_handlers[] = {
10112 &nfs4_xattr_nfs4_acl_handler,
10113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
10114 &nfs4_xattr_nfs4_label_handler,
10121 * c-basic-offset: 8