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"
67 #include "nfs4idmap.h"
68 #include "nfs4session.h"
72 #include "nfs4trace.h"
74 #define NFSDBG_FACILITY NFSDBG_PROC
76 #define NFS4_BITMASK_SZ 3
78 #define NFS4_POLL_RETRY_MIN (HZ/10)
79 #define NFS4_POLL_RETRY_MAX (15*HZ)
81 /* file attributes which can be mapped to nfs attributes */
82 #define NFS4_VALID_ATTRS (ATTR_MODE \
93 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
94 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
95 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
96 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
97 struct nfs_fattr *fattr, struct inode *inode);
98 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
99 struct nfs_fattr *fattr, struct iattr *sattr,
100 struct nfs_open_context *ctx, struct nfs4_label *ilabel);
101 #ifdef CONFIG_NFS_V4_1
102 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
103 const struct cred *cred,
104 struct nfs4_slot *slot,
106 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
107 const struct cred *);
108 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
109 const struct cred *, bool);
112 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
113 static inline struct nfs4_label *
114 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
115 struct iattr *sattr, struct nfs4_label *label)
122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
130 err = security_dentry_init_security(dentry, sattr->ia_mode,
131 &dentry->d_name, NULL,
132 (void **)&label->label, &label->len);
139 nfs4_label_release_security(struct nfs4_label *label)
142 security_release_secctx(label->label, label->len);
144 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
147 return server->attr_bitmask;
149 return server->attr_bitmask_nl;
152 static inline struct nfs4_label *
153 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
154 struct iattr *sattr, struct nfs4_label *l)
157 nfs4_label_release_security(struct nfs4_label *label)
160 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
161 { return server->attr_bitmask; }
164 /* Prevent leaks of NFSv4 errors into userland */
165 static int nfs4_map_errors(int err)
170 case -NFS4ERR_RESOURCE:
171 case -NFS4ERR_LAYOUTTRYLATER:
172 case -NFS4ERR_RECALLCONFLICT:
174 case -NFS4ERR_WRONGSEC:
175 case -NFS4ERR_WRONG_CRED:
177 case -NFS4ERR_BADOWNER:
178 case -NFS4ERR_BADNAME:
180 case -NFS4ERR_SHARE_DENIED:
182 case -NFS4ERR_MINOR_VERS_MISMATCH:
183 return -EPROTONOSUPPORT;
184 case -NFS4ERR_FILE_OPEN:
186 case -NFS4ERR_NOT_SAME:
189 dprintk("%s could not handle NFSv4 error %d\n",
197 * This is our standard bitmap for GETATTR requests.
199 const u32 nfs4_fattr_bitmap[3] = {
201 | FATTR4_WORD0_CHANGE
204 | FATTR4_WORD0_FILEID,
206 | FATTR4_WORD1_NUMLINKS
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY
214 | FATTR4_WORD1_MOUNTED_ON_FILEID,
215 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
216 FATTR4_WORD2_SECURITY_LABEL
220 static const u32 nfs4_pnfs_open_bitmap[3] = {
222 | FATTR4_WORD0_CHANGE
225 | FATTR4_WORD0_FILEID,
227 | FATTR4_WORD1_NUMLINKS
229 | FATTR4_WORD1_OWNER_GROUP
230 | FATTR4_WORD1_RAWDEV
231 | FATTR4_WORD1_SPACE_USED
232 | FATTR4_WORD1_TIME_ACCESS
233 | FATTR4_WORD1_TIME_METADATA
234 | FATTR4_WORD1_TIME_MODIFY,
235 FATTR4_WORD2_MDSTHRESHOLD
236 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
237 | FATTR4_WORD2_SECURITY_LABEL
241 static const u32 nfs4_open_noattr_bitmap[3] = {
243 | FATTR4_WORD0_FILEID,
246 const u32 nfs4_statfs_bitmap[3] = {
247 FATTR4_WORD0_FILES_AVAIL
248 | FATTR4_WORD0_FILES_FREE
249 | FATTR4_WORD0_FILES_TOTAL,
250 FATTR4_WORD1_SPACE_AVAIL
251 | FATTR4_WORD1_SPACE_FREE
252 | FATTR4_WORD1_SPACE_TOTAL
255 const u32 nfs4_pathconf_bitmap[3] = {
257 | FATTR4_WORD0_MAXNAME,
261 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
262 | FATTR4_WORD0_MAXREAD
263 | FATTR4_WORD0_MAXWRITE
264 | FATTR4_WORD0_LEASE_TIME,
265 FATTR4_WORD1_TIME_DELTA
266 | FATTR4_WORD1_FS_LAYOUT_TYPES,
267 FATTR4_WORD2_LAYOUT_BLKSIZE
268 | FATTR4_WORD2_CLONE_BLKSIZE
269 | FATTR4_WORD2_CHANGE_ATTR_TYPE
270 | FATTR4_WORD2_XATTR_SUPPORT
273 const u32 nfs4_fs_locations_bitmap[3] = {
277 | FATTR4_WORD0_FILEID
278 | FATTR4_WORD0_FS_LOCATIONS,
280 | FATTR4_WORD1_OWNER_GROUP
281 | FATTR4_WORD1_RAWDEV
282 | FATTR4_WORD1_SPACE_USED
283 | FATTR4_WORD1_TIME_ACCESS
284 | FATTR4_WORD1_TIME_METADATA
285 | FATTR4_WORD1_TIME_MODIFY
286 | FATTR4_WORD1_MOUNTED_ON_FILEID,
289 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
290 struct inode *inode, unsigned long flags)
292 unsigned long cache_validity;
294 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
295 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
298 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags;
300 /* Remove the attributes over which we have full control */
301 dst[1] &= ~FATTR4_WORD1_RAWDEV;
302 if (!(cache_validity & NFS_INO_INVALID_SIZE))
303 dst[0] &= ~FATTR4_WORD0_SIZE;
305 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
306 dst[0] &= ~FATTR4_WORD0_CHANGE;
308 if (!(cache_validity & NFS_INO_INVALID_MODE))
309 dst[1] &= ~FATTR4_WORD1_MODE;
310 if (!(cache_validity & NFS_INO_INVALID_OTHER))
311 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP);
314 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
315 struct nfs4_readdir_arg *readdir)
317 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
321 readdir->cookie = cookie;
322 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
327 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
332 * NFSv4 servers do not return entries for '.' and '..'
333 * Therefore, we fake these entries here. We let '.'
334 * have cookie 0 and '..' have cookie 1. Note that
335 * when talking to the server, we always send cookie 0
338 start = p = kmap_atomic(*readdir->pages);
341 *p++ = xdr_one; /* next */
342 *p++ = xdr_zero; /* cookie, first word */
343 *p++ = xdr_one; /* cookie, second word */
344 *p++ = xdr_one; /* entry len */
345 memcpy(p, ".\0\0\0", 4); /* entry */
347 *p++ = xdr_one; /* bitmap length */
348 *p++ = htonl(attrs); /* bitmap */
349 *p++ = htonl(12); /* attribute buffer length */
350 *p++ = htonl(NF4DIR);
351 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
354 *p++ = xdr_one; /* next */
355 *p++ = xdr_zero; /* cookie, first word */
356 *p++ = xdr_two; /* cookie, second word */
357 *p++ = xdr_two; /* entry len */
358 memcpy(p, "..\0\0", 4); /* entry */
360 *p++ = xdr_one; /* bitmap length */
361 *p++ = htonl(attrs); /* bitmap */
362 *p++ = htonl(12); /* attribute buffer length */
363 *p++ = htonl(NF4DIR);
364 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
366 readdir->pgbase = (char *)p - (char *)start;
367 readdir->count -= readdir->pgbase;
368 kunmap_atomic(start);
371 static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version)
373 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) {
374 fattr->pre_change_attr = version;
375 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
379 static void nfs4_test_and_free_stateid(struct nfs_server *server,
380 nfs4_stateid *stateid,
381 const struct cred *cred)
383 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
385 ops->test_and_free_expired(server, stateid, cred);
388 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
389 nfs4_stateid *stateid,
390 const struct cred *cred)
392 stateid->type = NFS4_REVOKED_STATEID_TYPE;
393 nfs4_test_and_free_stateid(server, stateid, cred);
396 static void nfs4_free_revoked_stateid(struct nfs_server *server,
397 const nfs4_stateid *stateid,
398 const struct cred *cred)
402 nfs4_stateid_copy(&tmp, stateid);
403 __nfs4_free_revoked_stateid(server, &tmp, cred);
406 static long nfs4_update_delay(long *timeout)
410 return NFS4_POLL_RETRY_MAX;
412 *timeout = NFS4_POLL_RETRY_MIN;
413 if (*timeout > NFS4_POLL_RETRY_MAX)
414 *timeout = NFS4_POLL_RETRY_MAX;
420 static int nfs4_delay_killable(long *timeout)
424 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
425 schedule_timeout(nfs4_update_delay(timeout));
426 if (!__fatal_signal_pending(current))
431 static int nfs4_delay_interruptible(long *timeout)
435 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE);
436 schedule_timeout(nfs4_update_delay(timeout));
437 if (!signal_pending(current))
439 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
442 static int nfs4_delay(long *timeout, bool interruptible)
445 return nfs4_delay_interruptible(timeout);
446 return nfs4_delay_killable(timeout);
449 static const nfs4_stateid *
450 nfs4_recoverable_stateid(const nfs4_stateid *stateid)
454 switch (stateid->type) {
455 case NFS4_OPEN_STATEID_TYPE:
456 case NFS4_LOCK_STATEID_TYPE:
457 case NFS4_DELEGATION_STATEID_TYPE:
465 /* This is the error handling routine for processes that are allowed
468 static int nfs4_do_handle_exception(struct nfs_server *server,
469 int errorcode, struct nfs4_exception *exception)
471 struct nfs_client *clp = server->nfs_client;
472 struct nfs4_state *state = exception->state;
473 const nfs4_stateid *stateid;
474 struct inode *inode = exception->inode;
477 exception->delay = 0;
478 exception->recovering = 0;
479 exception->retry = 0;
481 stateid = nfs4_recoverable_stateid(exception->stateid);
482 if (stateid == NULL && state != NULL)
483 stateid = nfs4_recoverable_stateid(&state->stateid);
488 case -NFS4ERR_BADHANDLE:
490 if (inode != NULL && S_ISREG(inode->i_mode))
491 pnfs_destroy_layout(NFS_I(inode));
493 case -NFS4ERR_DELEG_REVOKED:
494 case -NFS4ERR_ADMIN_REVOKED:
495 case -NFS4ERR_EXPIRED:
496 case -NFS4ERR_BAD_STATEID:
497 case -NFS4ERR_PARTNER_NO_AUTH:
498 if (inode != NULL && stateid != NULL) {
499 nfs_inode_find_state_and_recover(inode,
501 goto wait_on_recovery;
504 case -NFS4ERR_OPENMODE:
508 err = nfs_async_inode_return_delegation(inode,
511 goto wait_on_recovery;
512 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
513 exception->retry = 1;
519 ret = nfs4_schedule_stateid_recovery(server, state);
522 goto wait_on_recovery;
523 case -NFS4ERR_STALE_STATEID:
524 case -NFS4ERR_STALE_CLIENTID:
525 nfs4_schedule_lease_recovery(clp);
526 goto wait_on_recovery;
528 ret = nfs4_schedule_migration_recovery(server);
531 goto wait_on_recovery;
532 case -NFS4ERR_LEASE_MOVED:
533 nfs4_schedule_lease_moved_recovery(clp);
534 goto wait_on_recovery;
535 #if defined(CONFIG_NFS_V4_1)
536 case -NFS4ERR_BADSESSION:
537 case -NFS4ERR_BADSLOT:
538 case -NFS4ERR_BAD_HIGH_SLOT:
539 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
540 case -NFS4ERR_DEADSESSION:
541 case -NFS4ERR_SEQ_FALSE_RETRY:
542 case -NFS4ERR_SEQ_MISORDERED:
543 /* Handled in nfs41_sequence_process() */
544 goto wait_on_recovery;
545 #endif /* defined(CONFIG_NFS_V4_1) */
546 case -NFS4ERR_FILE_OPEN:
547 if (exception->timeout > HZ) {
548 /* We have retried a decent amount, time to
556 nfs_inc_server_stats(server, NFSIOS_DELAY);
559 case -NFS4ERR_LAYOUTTRYLATER:
560 case -NFS4ERR_RECALLCONFLICT:
561 exception->delay = 1;
564 case -NFS4ERR_RETRY_UNCACHED_REP:
565 case -NFS4ERR_OLD_STATEID:
566 exception->retry = 1;
568 case -NFS4ERR_BADOWNER:
569 /* The following works around a Linux server bug! */
570 case -NFS4ERR_BADNAME:
571 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
572 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
573 exception->retry = 1;
574 printk(KERN_WARNING "NFS: v4 server %s "
575 "does not accept raw "
577 "Reenabling the idmapper.\n",
578 server->nfs_client->cl_hostname);
581 /* We failed to handle the error */
582 return nfs4_map_errors(ret);
584 exception->recovering = 1;
589 * Track the number of NFS4ERR_DELAY related retransmissions and return
590 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit
591 * set by 'nfs_delay_retrans'.
593 static int nfs4_exception_should_retrans(const struct nfs_server *server,
594 struct nfs4_exception *exception)
596 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) {
597 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans)
603 /* This is the error handling routine for processes that are allowed
606 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
608 struct nfs_client *clp = server->nfs_client;
611 ret = nfs4_do_handle_exception(server, errorcode, exception);
612 if (exception->delay) {
613 int ret2 = nfs4_exception_should_retrans(server, exception);
615 exception->retry = 0;
618 ret = nfs4_delay(&exception->timeout,
619 exception->interruptible);
622 if (exception->recovering) {
623 if (exception->task_is_privileged)
625 ret = nfs4_wait_clnt_recover(clp);
626 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
633 exception->retry = 1;
638 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
639 int errorcode, struct nfs4_exception *exception)
641 struct nfs_client *clp = server->nfs_client;
644 ret = nfs4_do_handle_exception(server, errorcode, exception);
645 if (exception->delay) {
646 int ret2 = nfs4_exception_should_retrans(server, exception);
648 exception->retry = 0;
651 rpc_delay(task, nfs4_update_delay(&exception->timeout));
654 if (exception->recovering) {
655 if (exception->task_is_privileged)
657 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
658 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
659 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
662 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
667 exception->retry = 1;
669 * For NFS4ERR_MOVED, the client transport will need to
670 * be recomputed after migration recovery has completed.
672 if (errorcode == -NFS4ERR_MOVED)
673 rpc_task_release_transport(task);
679 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
680 struct nfs4_state *state, long *timeout)
682 struct nfs4_exception exception = {
686 if (task->tk_status >= 0)
689 exception.timeout = *timeout;
690 task->tk_status = nfs4_async_handle_exception(task, server,
693 if (exception.delay && timeout)
694 *timeout = exception.timeout;
701 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
702 * or 'false' otherwise.
704 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
706 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
707 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
710 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
712 spin_lock(&clp->cl_lock);
713 if (time_before(clp->cl_last_renewal,timestamp))
714 clp->cl_last_renewal = timestamp;
715 spin_unlock(&clp->cl_lock);
718 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
720 struct nfs_client *clp = server->nfs_client;
722 if (!nfs4_has_session(clp))
723 do_renew_lease(clp, timestamp);
726 struct nfs4_call_sync_data {
727 const struct nfs_server *seq_server;
728 struct nfs4_sequence_args *seq_args;
729 struct nfs4_sequence_res *seq_res;
732 void nfs4_init_sequence(struct nfs4_sequence_args *args,
733 struct nfs4_sequence_res *res, int cache_reply,
736 args->sa_slot = NULL;
737 args->sa_cache_this = cache_reply;
738 args->sa_privileged = privileged;
743 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
745 struct nfs4_slot *slot = res->sr_slot;
746 struct nfs4_slot_table *tbl;
749 spin_lock(&tbl->slot_tbl_lock);
750 if (!nfs41_wake_and_assign_slot(tbl, slot))
751 nfs4_free_slot(tbl, slot);
752 spin_unlock(&tbl->slot_tbl_lock);
757 static int nfs40_sequence_done(struct rpc_task *task,
758 struct nfs4_sequence_res *res)
760 if (res->sr_slot != NULL)
761 nfs40_sequence_free_slot(res);
765 #if defined(CONFIG_NFS_V4_1)
767 static void nfs41_release_slot(struct nfs4_slot *slot)
769 struct nfs4_session *session;
770 struct nfs4_slot_table *tbl;
771 bool send_new_highest_used_slotid = false;
776 session = tbl->session;
778 /* Bump the slot sequence number */
783 spin_lock(&tbl->slot_tbl_lock);
784 /* Be nice to the server: try to ensure that the last transmitted
785 * value for highest_user_slotid <= target_highest_slotid
787 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
788 send_new_highest_used_slotid = true;
790 if (nfs41_wake_and_assign_slot(tbl, slot)) {
791 send_new_highest_used_slotid = false;
794 nfs4_free_slot(tbl, slot);
796 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
797 send_new_highest_used_slotid = false;
799 spin_unlock(&tbl->slot_tbl_lock);
800 if (send_new_highest_used_slotid)
801 nfs41_notify_server(session->clp);
802 if (waitqueue_active(&tbl->slot_waitq))
803 wake_up_all(&tbl->slot_waitq);
806 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
808 nfs41_release_slot(res->sr_slot);
812 static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
815 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
816 slot->seq_nr_highest_sent = seqnr;
818 static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr)
820 nfs4_slot_sequence_record_sent(slot, seqnr);
821 slot->seq_nr_last_acked = seqnr;
824 static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
825 struct nfs4_slot *slot)
827 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
829 rpc_put_task_async(task);
832 static int nfs41_sequence_process(struct rpc_task *task,
833 struct nfs4_sequence_res *res)
835 struct nfs4_session *session;
836 struct nfs4_slot *slot = res->sr_slot;
837 struct nfs_client *clp;
843 /* don't increment the sequence number if the task wasn't sent */
844 if (!RPC_WAS_SENT(task) || slot->seq_done)
847 session = slot->table->session;
850 trace_nfs4_sequence_done(session, res);
852 status = res->sr_status;
853 if (task->tk_status == -NFS4ERR_DEADSESSION)
854 status = -NFS4ERR_DEADSESSION;
856 /* Check the SEQUENCE operation status */
859 /* Mark this sequence number as having been acked */
860 nfs4_slot_sequence_acked(slot, slot->seq_nr);
861 /* Update the slot's sequence and clientid lease timer */
863 do_renew_lease(clp, res->sr_timestamp);
864 /* Check sequence flags */
865 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
867 nfs41_update_target_slotid(slot->table, slot, res);
871 * sr_status remains 1 if an RPC level error occurred.
872 * The server may or may not have processed the sequence
875 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
879 /* The server detected a resend of the RPC call and
880 * returned NFS4ERR_DELAY as per Section 2.10.6.2
883 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
888 case -NFS4ERR_RETRY_UNCACHED_REP:
889 case -NFS4ERR_SEQ_FALSE_RETRY:
891 * The server thinks we tried to replay a request.
892 * Retry the call after bumping the sequence ID.
894 nfs4_slot_sequence_acked(slot, slot->seq_nr);
896 case -NFS4ERR_BADSLOT:
898 * The slot id we used was probably retired. Try again
899 * using a different slot id.
901 if (slot->slot_nr < slot->table->target_highest_slotid)
902 goto session_recover;
904 case -NFS4ERR_SEQ_MISORDERED:
905 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
907 * Were one or more calls using this slot interrupted?
908 * If the server never received the request, then our
909 * transmitted slot sequence number may be too high. However,
910 * if the server did receive the request then it might
911 * accidentally give us a reply with a mismatched operation.
912 * We can sort this out by sending a lone sequence operation
913 * to the server on the same slot.
915 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
917 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
918 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
925 * A retry might be sent while the original request is
926 * still in progress on the replier. The replier SHOULD
927 * deal with the issue by returning NFS4ERR_DELAY as the
928 * reply to SEQUENCE or CB_SEQUENCE operation, but
929 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
931 * Restart the search after a delay.
933 slot->seq_nr = slot->seq_nr_highest_sent;
935 case -NFS4ERR_BADSESSION:
936 case -NFS4ERR_DEADSESSION:
937 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
938 goto session_recover;
940 /* Just update the slot sequence no. */
944 /* The session may be reset by one of the error handlers. */
945 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
949 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state);
950 nfs4_schedule_session_recovery(session, status);
951 dprintk("%s ERROR: %d Reset session\n", __func__, status);
952 nfs41_sequence_free_slot(res);
957 if (rpc_restart_call_prepare(task)) {
958 nfs41_sequence_free_slot(res);
964 if (!rpc_restart_call(task))
966 rpc_delay(task, NFS4_POLL_RETRY_MAX);
970 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
972 if (!nfs41_sequence_process(task, res))
974 if (res->sr_slot != NULL)
975 nfs41_sequence_free_slot(res);
979 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
981 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
983 if (res->sr_slot == NULL)
985 if (res->sr_slot->table->session != NULL)
986 return nfs41_sequence_process(task, res);
987 return nfs40_sequence_done(task, res);
990 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
992 if (res->sr_slot != NULL) {
993 if (res->sr_slot->table->session != NULL)
994 nfs41_sequence_free_slot(res);
996 nfs40_sequence_free_slot(res);
1000 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
1002 if (res->sr_slot == NULL)
1004 if (!res->sr_slot->table->session)
1005 return nfs40_sequence_done(task, res);
1006 return nfs41_sequence_done(task, res);
1008 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1010 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
1012 struct nfs4_call_sync_data *data = calldata;
1014 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
1016 nfs4_setup_sequence(data->seq_server->nfs_client,
1017 data->seq_args, data->seq_res, task);
1020 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
1022 struct nfs4_call_sync_data *data = calldata;
1024 nfs41_sequence_done(task, data->seq_res);
1027 static const struct rpc_call_ops nfs41_call_sync_ops = {
1028 .rpc_call_prepare = nfs41_call_sync_prepare,
1029 .rpc_call_done = nfs41_call_sync_done,
1032 #else /* !CONFIG_NFS_V4_1 */
1034 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1036 return nfs40_sequence_done(task, res);
1039 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1041 if (res->sr_slot != NULL)
1042 nfs40_sequence_free_slot(res);
1045 int nfs4_sequence_done(struct rpc_task *task,
1046 struct nfs4_sequence_res *res)
1048 return nfs40_sequence_done(task, res);
1050 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1052 #endif /* !CONFIG_NFS_V4_1 */
1054 static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1056 res->sr_timestamp = jiffies;
1057 res->sr_status_flags = 0;
1062 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1063 struct nfs4_sequence_res *res,
1064 struct nfs4_slot *slot)
1068 slot->privileged = args->sa_privileged ? 1 : 0;
1069 args->sa_slot = slot;
1071 res->sr_slot = slot;
1074 int nfs4_setup_sequence(struct nfs_client *client,
1075 struct nfs4_sequence_args *args,
1076 struct nfs4_sequence_res *res,
1077 struct rpc_task *task)
1079 struct nfs4_session *session = nfs4_get_session(client);
1080 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
1081 struct nfs4_slot *slot;
1083 /* slot already allocated? */
1084 if (res->sr_slot != NULL)
1088 tbl = &session->fc_slot_table;
1090 spin_lock(&tbl->slot_tbl_lock);
1091 /* The state manager will wait until the slot table is empty */
1092 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1095 slot = nfs4_alloc_slot(tbl);
1097 if (slot == ERR_PTR(-ENOMEM))
1098 goto out_sleep_timeout;
1101 spin_unlock(&tbl->slot_tbl_lock);
1103 nfs4_sequence_attach_slot(args, res, slot);
1105 trace_nfs4_setup_sequence(session, args);
1107 nfs41_sequence_res_init(res);
1108 rpc_call_start(task);
1111 /* Try again in 1/4 second */
1112 if (args->sa_privileged)
1113 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1114 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1116 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1117 NULL, jiffies + (HZ >> 2));
1118 spin_unlock(&tbl->slot_tbl_lock);
1121 if (args->sa_privileged)
1122 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
1123 RPC_PRIORITY_PRIVILEGED);
1125 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1126 spin_unlock(&tbl->slot_tbl_lock);
1129 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1131 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1133 struct nfs4_call_sync_data *data = calldata;
1134 nfs4_setup_sequence(data->seq_server->nfs_client,
1135 data->seq_args, data->seq_res, task);
1138 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1140 struct nfs4_call_sync_data *data = calldata;
1141 nfs4_sequence_done(task, data->seq_res);
1144 static const struct rpc_call_ops nfs40_call_sync_ops = {
1145 .rpc_call_prepare = nfs40_call_sync_prepare,
1146 .rpc_call_done = nfs40_call_sync_done,
1149 static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1152 struct rpc_task *task;
1154 task = rpc_run_task(task_setup);
1156 return PTR_ERR(task);
1158 ret = task->tk_status;
1163 static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1164 struct nfs_server *server,
1165 struct rpc_message *msg,
1166 struct nfs4_sequence_args *args,
1167 struct nfs4_sequence_res *res,
1168 unsigned short task_flags)
1170 struct nfs_client *clp = server->nfs_client;
1171 struct nfs4_call_sync_data data = {
1172 .seq_server = server,
1176 struct rpc_task_setup task_setup = {
1179 .callback_ops = clp->cl_mvops->call_sync_ops,
1180 .callback_data = &data,
1181 .flags = task_flags,
1184 return nfs4_call_sync_custom(&task_setup);
1187 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1188 struct nfs_server *server,
1189 struct rpc_message *msg,
1190 struct nfs4_sequence_args *args,
1191 struct nfs4_sequence_res *res)
1193 unsigned short task_flags = 0;
1195 if (server->caps & NFS_CAP_MOVEABLE)
1196 task_flags = RPC_TASK_MOVEABLE;
1197 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags);
1201 int nfs4_call_sync(struct rpc_clnt *clnt,
1202 struct nfs_server *server,
1203 struct rpc_message *msg,
1204 struct nfs4_sequence_args *args,
1205 struct nfs4_sequence_res *res,
1208 nfs4_init_sequence(args, res, cache_reply, 0);
1209 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1213 nfs4_inc_nlink_locked(struct inode *inode)
1215 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1216 NFS_INO_INVALID_CTIME |
1217 NFS_INO_INVALID_NLINK);
1222 nfs4_inc_nlink(struct inode *inode)
1224 spin_lock(&inode->i_lock);
1225 nfs4_inc_nlink_locked(inode);
1226 spin_unlock(&inode->i_lock);
1230 nfs4_dec_nlink_locked(struct inode *inode)
1232 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1233 NFS_INO_INVALID_CTIME |
1234 NFS_INO_INVALID_NLINK);
1239 nfs4_update_changeattr_locked(struct inode *inode,
1240 struct nfs4_change_info *cinfo,
1241 unsigned long timestamp, unsigned long cache_validity)
1243 struct nfs_inode *nfsi = NFS_I(inode);
1244 u64 change_attr = inode_peek_iversion_raw(inode);
1246 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
1247 if (S_ISDIR(inode->i_mode))
1248 cache_validity |= NFS_INO_INVALID_DATA;
1250 switch (NFS_SERVER(inode)->change_attr_type) {
1251 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
1252 if (cinfo->after == change_attr)
1256 if ((s64)(change_attr - cinfo->after) >= 0)
1260 inode_set_iversion_raw(inode, cinfo->after);
1261 if (!cinfo->atomic || cinfo->before != change_attr) {
1262 if (S_ISDIR(inode->i_mode))
1263 nfs_force_lookup_revalidate(inode);
1265 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1267 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL |
1268 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER |
1269 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK |
1270 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR;
1271 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1273 nfsi->attrtimeo_timestamp = jiffies;
1274 nfsi->read_cache_jiffies = timestamp;
1275 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1276 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1278 nfs_set_cache_invalid(inode, cache_validity);
1282 nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1283 unsigned long timestamp, unsigned long cache_validity)
1285 spin_lock(&dir->i_lock);
1286 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
1287 spin_unlock(&dir->i_lock);
1290 struct nfs4_open_createattrs {
1291 struct nfs4_label *label;
1292 struct iattr *sattr;
1293 const __u32 verf[2];
1296 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1297 int err, struct nfs4_exception *exception)
1301 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1303 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1304 exception->retry = 1;
1308 static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1310 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1313 static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1315 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1317 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1321 nfs4_map_atomic_open_share(struct nfs_server *server,
1322 fmode_t fmode, int openflags)
1326 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1328 res = NFS4_SHARE_ACCESS_READ;
1331 res = NFS4_SHARE_ACCESS_WRITE;
1333 case FMODE_READ|FMODE_WRITE:
1334 res = NFS4_SHARE_ACCESS_BOTH;
1336 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1338 /* Want no delegation if we're using O_DIRECT */
1339 if (openflags & O_DIRECT)
1340 res |= NFS4_SHARE_WANT_NO_DELEG;
1345 static enum open_claim_type4
1346 nfs4_map_atomic_open_claim(struct nfs_server *server,
1347 enum open_claim_type4 claim)
1349 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1354 case NFS4_OPEN_CLAIM_FH:
1355 return NFS4_OPEN_CLAIM_NULL;
1356 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1357 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1358 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1359 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1363 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1365 p->o_res.f_attr = &p->f_attr;
1366 p->o_res.seqid = p->o_arg.seqid;
1367 p->c_res.seqid = p->c_arg.seqid;
1368 p->o_res.server = p->o_arg.server;
1369 p->o_res.access_request = p->o_arg.access;
1370 nfs_fattr_init(&p->f_attr);
1371 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1374 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1375 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1376 const struct nfs4_open_createattrs *c,
1377 enum open_claim_type4 claim,
1380 struct dentry *parent = dget_parent(dentry);
1381 struct inode *dir = d_inode(parent);
1382 struct nfs_server *server = NFS_SERVER(dir);
1383 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1384 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1385 struct nfs4_opendata *p;
1387 p = kzalloc(sizeof(*p), gfp_mask);
1391 p->f_attr.label = nfs4_label_alloc(server, gfp_mask);
1392 if (IS_ERR(p->f_attr.label))
1395 p->a_label = nfs4_label_alloc(server, gfp_mask);
1396 if (IS_ERR(p->a_label))
1399 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1400 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1401 if (IS_ERR(p->o_arg.seqid))
1402 goto err_free_label;
1403 nfs_sb_active(dentry->d_sb);
1404 p->dentry = dget(dentry);
1407 atomic_inc(&sp->so_count);
1408 p->o_arg.open_flags = flags;
1409 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1410 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1411 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1413 if (flags & O_CREAT) {
1414 p->o_arg.umask = current_umask();
1415 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1416 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1417 p->o_arg.u.attrs = &p->attrs;
1418 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1420 memcpy(p->o_arg.u.verifier.data, c->verf,
1421 sizeof(p->o_arg.u.verifier.data));
1424 /* ask server to check for all possible rights as results
1426 switch (p->o_arg.claim) {
1429 case NFS4_OPEN_CLAIM_NULL:
1430 case NFS4_OPEN_CLAIM_FH:
1431 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1432 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE |
1433 NFS4_ACCESS_EXECUTE |
1434 nfs_access_xattr_mask(server);
1436 p->o_arg.clientid = server->nfs_client->cl_clientid;
1437 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1438 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1439 p->o_arg.name = &dentry->d_name;
1440 p->o_arg.server = server;
1441 p->o_arg.bitmask = nfs4_bitmask(server, label);
1442 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1443 switch (p->o_arg.claim) {
1444 case NFS4_OPEN_CLAIM_NULL:
1445 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1446 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1447 p->o_arg.fh = NFS_FH(dir);
1449 case NFS4_OPEN_CLAIM_PREVIOUS:
1450 case NFS4_OPEN_CLAIM_FH:
1451 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1452 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1453 p->o_arg.fh = NFS_FH(d_inode(dentry));
1455 p->c_arg.fh = &p->o_res.fh;
1456 p->c_arg.stateid = &p->o_res.stateid;
1457 p->c_arg.seqid = p->o_arg.seqid;
1458 nfs4_init_opendata_res(p);
1459 kref_init(&p->kref);
1463 nfs4_label_free(p->a_label);
1465 nfs4_label_free(p->f_attr.label);
1473 static void nfs4_opendata_free(struct kref *kref)
1475 struct nfs4_opendata *p = container_of(kref,
1476 struct nfs4_opendata, kref);
1477 struct super_block *sb = p->dentry->d_sb;
1479 nfs4_lgopen_release(p->lgp);
1480 nfs_free_seqid(p->o_arg.seqid);
1481 nfs4_sequence_free_slot(&p->o_res.seq_res);
1482 if (p->state != NULL)
1483 nfs4_put_open_state(p->state);
1484 nfs4_put_state_owner(p->owner);
1486 nfs4_label_free(p->a_label);
1487 nfs4_label_free(p->f_attr.label);
1491 nfs_sb_deactive(sb);
1492 nfs_fattr_free_names(&p->f_attr);
1493 kfree(p->f_attr.mdsthreshold);
1497 static void nfs4_opendata_put(struct nfs4_opendata *p)
1500 kref_put(&p->kref, nfs4_opendata_free);
1503 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1506 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1507 case FMODE_READ|FMODE_WRITE:
1508 return state->n_rdwr != 0;
1510 return state->n_wronly != 0;
1512 return state->n_rdonly != 0;
1518 static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1519 int open_mode, enum open_claim_type4 claim)
1523 if (open_mode & (O_EXCL|O_TRUNC))
1526 case NFS4_OPEN_CLAIM_NULL:
1527 case NFS4_OPEN_CLAIM_FH:
1532 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1534 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1535 && state->n_rdonly != 0;
1538 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1539 && state->n_wronly != 0;
1541 case FMODE_READ|FMODE_WRITE:
1542 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1543 && state->n_rdwr != 0;
1549 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1550 enum open_claim_type4 claim)
1552 if (delegation == NULL)
1554 if ((delegation->type & fmode) != fmode)
1557 case NFS4_OPEN_CLAIM_NULL:
1558 case NFS4_OPEN_CLAIM_FH:
1560 case NFS4_OPEN_CLAIM_PREVIOUS:
1561 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1567 nfs_mark_delegation_referenced(delegation);
1571 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1580 case FMODE_READ|FMODE_WRITE:
1583 nfs4_state_set_mode_locked(state, state->state | fmode);
1586 #ifdef CONFIG_NFS_V4_1
1587 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1589 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1591 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1593 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1597 #endif /* CONFIG_NFS_V4_1 */
1599 static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1601 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1602 wake_up_all(&state->waitq);
1605 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1607 struct nfs_client *clp = state->owner->so_server->nfs_client;
1608 bool need_recover = false;
1610 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1611 need_recover = true;
1612 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1613 need_recover = true;
1614 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1615 need_recover = true;
1617 nfs4_state_mark_reclaim_nograce(clp, state);
1621 * Check for whether or not the caller may update the open stateid
1622 * to the value passed in by stateid.
1624 * Note: This function relies heavily on the server implementing
1625 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1627 * i.e. The stateid seqids have to be initialised to 1, and
1628 * are then incremented on every state transition.
1630 static bool nfs_stateid_is_sequential(struct nfs4_state *state,
1631 const nfs4_stateid *stateid)
1633 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1634 /* The common case - we're updating to a new sequence number */
1635 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1636 if (nfs4_stateid_is_next(&state->open_stateid, stateid))
1640 /* The server returned a new stateid */
1642 /* This is the first OPEN in this generation */
1643 if (stateid->seqid == cpu_to_be32(1))
1648 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1650 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1652 if (state->n_wronly)
1653 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1654 if (state->n_rdonly)
1655 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1657 set_bit(NFS_O_RDWR_STATE, &state->flags);
1658 set_bit(NFS_OPEN_STATE, &state->flags);
1661 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1662 nfs4_stateid *stateid, fmode_t fmode)
1664 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1665 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1667 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1670 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1673 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1674 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1675 clear_bit(NFS_OPEN_STATE, &state->flags);
1677 if (stateid == NULL)
1679 /* Handle OPEN+OPEN_DOWNGRADE races */
1680 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1681 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1682 nfs_resync_open_stateid_locked(state);
1685 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1686 nfs4_stateid_copy(&state->stateid, stateid);
1687 nfs4_stateid_copy(&state->open_stateid, stateid);
1688 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1690 nfs_state_log_update_open_stateid(state);
1693 static void nfs_clear_open_stateid(struct nfs4_state *state,
1694 nfs4_stateid *arg_stateid,
1695 nfs4_stateid *stateid, fmode_t fmode)
1697 write_seqlock(&state->seqlock);
1698 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1699 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1700 nfs_clear_open_stateid_locked(state, stateid, fmode);
1701 write_sequnlock(&state->seqlock);
1702 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1703 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1706 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1707 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1708 __must_hold(&state->owner->so_lock)
1709 __must_hold(&state->seqlock)
1717 if (nfs_stateid_is_sequential(state, stateid))
1722 /* Rely on seqids for serialisation with NFSv4.0 */
1723 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1726 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1727 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1729 * Ensure we process the state changes in the same order
1730 * in which the server processed them by delaying the
1731 * update of the stateid until we are in sequence.
1733 write_sequnlock(&state->seqlock);
1734 spin_unlock(&state->owner->so_lock);
1736 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1738 if (!fatal_signal_pending(current)) {
1739 if (schedule_timeout(5*HZ) == 0)
1745 finish_wait(&state->waitq, &wait);
1747 spin_lock(&state->owner->so_lock);
1748 write_seqlock(&state->seqlock);
1751 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1752 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1753 nfs4_stateid_copy(freeme, &state->open_stateid);
1754 nfs_test_and_clear_all_open_stateid(state);
1757 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1758 nfs4_stateid_copy(&state->stateid, stateid);
1759 nfs4_stateid_copy(&state->open_stateid, stateid);
1760 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1761 nfs_state_log_update_open_stateid(state);
1764 static void nfs_state_set_open_stateid(struct nfs4_state *state,
1765 const nfs4_stateid *open_stateid,
1767 nfs4_stateid *freeme)
1770 * Protect the call to nfs4_state_set_mode_locked and
1771 * serialise the stateid update
1773 write_seqlock(&state->seqlock);
1774 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1777 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1780 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1782 case FMODE_READ|FMODE_WRITE:
1783 set_bit(NFS_O_RDWR_STATE, &state->flags);
1785 set_bit(NFS_OPEN_STATE, &state->flags);
1786 write_sequnlock(&state->seqlock);
1789 static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1791 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1792 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1793 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1794 clear_bit(NFS_OPEN_STATE, &state->flags);
1797 static void nfs_state_set_delegation(struct nfs4_state *state,
1798 const nfs4_stateid *deleg_stateid,
1802 * Protect the call to nfs4_state_set_mode_locked and
1803 * serialise the stateid update
1805 write_seqlock(&state->seqlock);
1806 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1807 set_bit(NFS_DELEGATED_STATE, &state->flags);
1808 write_sequnlock(&state->seqlock);
1811 static void nfs_state_clear_delegation(struct nfs4_state *state)
1813 write_seqlock(&state->seqlock);
1814 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1815 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1816 write_sequnlock(&state->seqlock);
1819 int update_open_stateid(struct nfs4_state *state,
1820 const nfs4_stateid *open_stateid,
1821 const nfs4_stateid *delegation,
1824 struct nfs_server *server = NFS_SERVER(state->inode);
1825 struct nfs_client *clp = server->nfs_client;
1826 struct nfs_inode *nfsi = NFS_I(state->inode);
1827 struct nfs_delegation *deleg_cur;
1828 nfs4_stateid freeme = { };
1831 fmode &= (FMODE_READ|FMODE_WRITE);
1834 spin_lock(&state->owner->so_lock);
1835 if (open_stateid != NULL) {
1836 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1840 deleg_cur = nfs4_get_valid_delegation(state->inode);
1841 if (deleg_cur == NULL)
1844 spin_lock(&deleg_cur->lock);
1845 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1846 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1847 (deleg_cur->type & fmode) != fmode)
1848 goto no_delegation_unlock;
1850 if (delegation == NULL)
1851 delegation = &deleg_cur->stateid;
1852 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
1853 goto no_delegation_unlock;
1855 nfs_mark_delegation_referenced(deleg_cur);
1856 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1858 no_delegation_unlock:
1859 spin_unlock(&deleg_cur->lock);
1862 update_open_stateflags(state, fmode);
1863 spin_unlock(&state->owner->so_lock);
1866 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1867 nfs4_schedule_state_manager(clp);
1868 if (freeme.type != 0)
1869 nfs4_test_and_free_stateid(server, &freeme,
1870 state->owner->so_cred);
1875 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1876 const nfs4_stateid *stateid)
1878 struct nfs4_state *state = lsp->ls_state;
1881 spin_lock(&state->state_lock);
1882 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1884 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1886 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1889 spin_unlock(&state->state_lock);
1893 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1895 struct nfs_delegation *delegation;
1897 fmode &= FMODE_READ|FMODE_WRITE;
1899 delegation = nfs4_get_valid_delegation(inode);
1900 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1905 nfs4_inode_return_delegation(inode);
1908 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1910 struct nfs4_state *state = opendata->state;
1911 struct nfs_delegation *delegation;
1912 int open_mode = opendata->o_arg.open_flags;
1913 fmode_t fmode = opendata->o_arg.fmode;
1914 enum open_claim_type4 claim = opendata->o_arg.claim;
1915 nfs4_stateid stateid;
1919 spin_lock(&state->owner->so_lock);
1920 if (can_open_cached(state, fmode, open_mode, claim)) {
1921 update_open_stateflags(state, fmode);
1922 spin_unlock(&state->owner->so_lock);
1923 goto out_return_state;
1925 spin_unlock(&state->owner->so_lock);
1927 delegation = nfs4_get_valid_delegation(state->inode);
1928 if (!can_open_delegated(delegation, fmode, claim)) {
1932 /* Save the delegation */
1933 nfs4_stateid_copy(&stateid, &delegation->stateid);
1935 nfs_release_seqid(opendata->o_arg.seqid);
1936 if (!opendata->is_recover) {
1937 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1943 /* Try to update the stateid using the delegation */
1944 if (update_open_stateid(state, NULL, &stateid, fmode))
1945 goto out_return_state;
1948 return ERR_PTR(ret);
1950 refcount_inc(&state->count);
1955 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1957 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1958 struct nfs_delegation *delegation;
1959 int delegation_flags = 0;
1962 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1964 delegation_flags = delegation->flags;
1966 switch (data->o_arg.claim) {
1969 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1970 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1971 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1972 "returning a delegation for "
1973 "OPEN(CLAIM_DELEGATE_CUR)\n",
1977 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1978 nfs_inode_set_delegation(state->inode,
1979 data->owner->so_cred,
1980 data->o_res.delegation_type,
1981 &data->o_res.delegation,
1982 data->o_res.pagemod_limit);
1984 nfs_inode_reclaim_delegation(state->inode,
1985 data->owner->so_cred,
1986 data->o_res.delegation_type,
1987 &data->o_res.delegation,
1988 data->o_res.pagemod_limit);
1990 if (data->o_res.do_recall)
1991 nfs_async_inode_return_delegation(state->inode,
1992 &data->o_res.delegation);
1996 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1997 * and update the nfs4_state.
1999 static struct nfs4_state *
2000 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
2002 struct inode *inode = data->state->inode;
2003 struct nfs4_state *state = data->state;
2006 if (!data->rpc_done) {
2007 if (data->rpc_status)
2008 return ERR_PTR(data->rpc_status);
2009 return nfs4_try_open_cached(data);
2012 ret = nfs_refresh_inode(inode, &data->f_attr);
2014 return ERR_PTR(ret);
2016 if (data->o_res.delegation_type != 0)
2017 nfs4_opendata_check_deleg(data, state);
2019 if (!update_open_stateid(state, &data->o_res.stateid,
2020 NULL, data->o_arg.fmode))
2021 return ERR_PTR(-EAGAIN);
2022 refcount_inc(&state->count);
2027 static struct inode *
2028 nfs4_opendata_get_inode(struct nfs4_opendata *data)
2030 struct inode *inode;
2032 switch (data->o_arg.claim) {
2033 case NFS4_OPEN_CLAIM_NULL:
2034 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
2035 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2036 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
2037 return ERR_PTR(-EAGAIN);
2038 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
2042 inode = d_inode(data->dentry);
2044 nfs_refresh_inode(inode, &data->f_attr);
2049 static struct nfs4_state *
2050 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
2052 struct nfs4_state *state;
2053 struct inode *inode;
2055 inode = nfs4_opendata_get_inode(data);
2057 return ERR_CAST(inode);
2058 if (data->state != NULL && data->state->inode == inode) {
2059 state = data->state;
2060 refcount_inc(&state->count);
2062 state = nfs4_get_open_state(inode, data->owner);
2065 state = ERR_PTR(-ENOMEM);
2069 static struct nfs4_state *
2070 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2072 struct nfs4_state *state;
2074 if (!data->rpc_done) {
2075 state = nfs4_try_open_cached(data);
2076 trace_nfs4_cached_open(data->state);
2080 state = nfs4_opendata_find_nfs4_state(data);
2084 if (data->o_res.delegation_type != 0)
2085 nfs4_opendata_check_deleg(data, state);
2086 if (!update_open_stateid(state, &data->o_res.stateid,
2087 NULL, data->o_arg.fmode)) {
2088 nfs4_put_open_state(state);
2089 state = ERR_PTR(-EAGAIN);
2092 nfs_release_seqid(data->o_arg.seqid);
2096 static struct nfs4_state *
2097 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2099 struct nfs4_state *ret;
2101 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2102 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2104 ret = _nfs4_opendata_to_nfs4_state(data);
2105 nfs4_sequence_free_slot(&data->o_res.seq_res);
2109 static struct nfs_open_context *
2110 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
2112 struct nfs_inode *nfsi = NFS_I(state->inode);
2113 struct nfs_open_context *ctx;
2116 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
2117 if (ctx->state != state)
2119 if ((ctx->mode & mode) != mode)
2121 if (!get_nfs_open_context(ctx))
2127 return ERR_PTR(-ENOENT);
2130 static struct nfs_open_context *
2131 nfs4_state_find_open_context(struct nfs4_state *state)
2133 struct nfs_open_context *ctx;
2135 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2138 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2141 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2144 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2145 struct nfs4_state *state, enum open_claim_type4 claim)
2147 struct nfs4_opendata *opendata;
2149 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
2150 NULL, claim, GFP_NOFS);
2151 if (opendata == NULL)
2152 return ERR_PTR(-ENOMEM);
2153 opendata->state = state;
2154 refcount_inc(&state->count);
2158 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2161 struct nfs4_state *newstate;
2162 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb);
2163 int openflags = opendata->o_arg.open_flags;
2166 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
2168 opendata->o_arg.fmode = fmode;
2169 opendata->o_arg.share_access =
2170 nfs4_map_atomic_open_share(server, fmode, openflags);
2171 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2172 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2173 nfs4_init_opendata_res(opendata);
2174 ret = _nfs4_recover_proc_open(opendata);
2177 newstate = nfs4_opendata_to_nfs4_state(opendata);
2178 if (IS_ERR(newstate))
2179 return PTR_ERR(newstate);
2180 if (newstate != opendata->state)
2182 nfs4_close_state(newstate, fmode);
2186 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2190 /* memory barrier prior to reading state->n_* */
2192 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2195 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2198 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2202 * We may have performed cached opens for all three recoveries.
2203 * Check if we need to update the current stateid.
2205 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
2206 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
2207 write_seqlock(&state->seqlock);
2208 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2209 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2210 write_sequnlock(&state->seqlock);
2217 * reclaim state on the server after a reboot.
2219 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2221 struct nfs_delegation *delegation;
2222 struct nfs4_opendata *opendata;
2223 fmode_t delegation_type = 0;
2226 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2227 NFS4_OPEN_CLAIM_PREVIOUS);
2228 if (IS_ERR(opendata))
2229 return PTR_ERR(opendata);
2231 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2232 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
2233 delegation_type = delegation->type;
2235 opendata->o_arg.u.delegation_type = delegation_type;
2236 status = nfs4_open_recover(opendata, state);
2237 nfs4_opendata_put(opendata);
2241 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2243 struct nfs_server *server = NFS_SERVER(state->inode);
2244 struct nfs4_exception exception = { };
2247 err = _nfs4_do_open_reclaim(ctx, state);
2248 trace_nfs4_open_reclaim(ctx, 0, err);
2249 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2251 if (err != -NFS4ERR_DELAY)
2253 nfs4_handle_exception(server, err, &exception);
2254 } while (exception.retry);
2258 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2260 struct nfs_open_context *ctx;
2263 ctx = nfs4_state_find_open_context(state);
2266 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2267 nfs_state_clear_open_state_flags(state);
2268 ret = nfs4_do_open_reclaim(ctx, state);
2269 put_nfs_open_context(ctx);
2273 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)
2277 printk(KERN_ERR "NFS: %s: unhandled error "
2278 "%d.\n", __func__, err);
2286 case -NFS4ERR_BADSESSION:
2287 case -NFS4ERR_BADSLOT:
2288 case -NFS4ERR_BAD_HIGH_SLOT:
2289 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2290 case -NFS4ERR_DEADSESSION:
2292 case -NFS4ERR_STALE_CLIENTID:
2293 case -NFS4ERR_STALE_STATEID:
2294 /* Don't recall a delegation if it was lost */
2295 nfs4_schedule_lease_recovery(server->nfs_client);
2297 case -NFS4ERR_MOVED:
2298 nfs4_schedule_migration_recovery(server);
2300 case -NFS4ERR_LEASE_MOVED:
2301 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2303 case -NFS4ERR_DELEG_REVOKED:
2304 case -NFS4ERR_ADMIN_REVOKED:
2305 case -NFS4ERR_EXPIRED:
2306 case -NFS4ERR_BAD_STATEID:
2307 case -NFS4ERR_OPENMODE:
2308 nfs_inode_find_state_and_recover(state->inode,
2310 nfs4_schedule_stateid_recovery(server, state);
2312 case -NFS4ERR_DELAY:
2313 case -NFS4ERR_GRACE:
2317 case -NFS4ERR_DENIED:
2319 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2321 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2328 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2329 struct nfs4_state *state, const nfs4_stateid *stateid)
2331 struct nfs_server *server = NFS_SERVER(state->inode);
2332 struct nfs4_opendata *opendata;
2335 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2336 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2337 if (IS_ERR(opendata))
2338 return PTR_ERR(opendata);
2339 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2340 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
2341 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2345 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
2346 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2350 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
2351 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2355 nfs_state_clear_delegation(state);
2357 nfs4_opendata_put(opendata);
2358 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2361 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2363 struct nfs4_opendata *data = calldata;
2365 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2366 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2369 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2371 struct nfs4_opendata *data = calldata;
2373 nfs40_sequence_done(task, &data->c_res.seq_res);
2375 data->rpc_status = task->tk_status;
2376 if (data->rpc_status == 0) {
2377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2378 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2379 renew_lease(data->o_res.server, data->timestamp);
2380 data->rpc_done = true;
2384 static void nfs4_open_confirm_release(void *calldata)
2386 struct nfs4_opendata *data = calldata;
2387 struct nfs4_state *state = NULL;
2389 /* If this request hasn't been cancelled, do nothing */
2390 if (!data->cancelled)
2392 /* In case of error, no cleanup! */
2393 if (!data->rpc_done)
2395 state = nfs4_opendata_to_nfs4_state(data);
2397 nfs4_close_state(state, data->o_arg.fmode);
2399 nfs4_opendata_put(data);
2402 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2403 .rpc_call_prepare = nfs4_open_confirm_prepare,
2404 .rpc_call_done = nfs4_open_confirm_done,
2405 .rpc_release = nfs4_open_confirm_release,
2409 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2411 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2413 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2414 struct rpc_task *task;
2415 struct rpc_message msg = {
2416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2417 .rpc_argp = &data->c_arg,
2418 .rpc_resp = &data->c_res,
2419 .rpc_cred = data->owner->so_cred,
2421 struct rpc_task_setup task_setup_data = {
2422 .rpc_client = server->client,
2423 .rpc_message = &msg,
2424 .callback_ops = &nfs4_open_confirm_ops,
2425 .callback_data = data,
2426 .workqueue = nfsiod_workqueue,
2427 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
2431 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2433 kref_get(&data->kref);
2434 data->rpc_done = false;
2435 data->rpc_status = 0;
2436 data->timestamp = jiffies;
2437 task = rpc_run_task(&task_setup_data);
2439 return PTR_ERR(task);
2440 status = rpc_wait_for_completion_task(task);
2442 data->cancelled = true;
2445 status = data->rpc_status;
2450 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2452 struct nfs4_opendata *data = calldata;
2453 struct nfs4_state_owner *sp = data->owner;
2454 struct nfs_client *clp = sp->so_server->nfs_client;
2455 enum open_claim_type4 claim = data->o_arg.claim;
2457 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2460 * Check if we still need to send an OPEN call, or if we can use
2461 * a delegation instead.
2463 if (data->state != NULL) {
2464 struct nfs_delegation *delegation;
2466 if (can_open_cached(data->state, data->o_arg.fmode,
2467 data->o_arg.open_flags, claim))
2470 delegation = nfs4_get_valid_delegation(data->state->inode);
2471 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2472 goto unlock_no_action;
2475 /* Update client id. */
2476 data->o_arg.clientid = clp->cl_clientid;
2480 case NFS4_OPEN_CLAIM_PREVIOUS:
2481 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2482 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2483 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2485 case NFS4_OPEN_CLAIM_FH:
2486 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2488 data->timestamp = jiffies;
2489 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2490 &data->o_arg.seq_args,
2491 &data->o_res.seq_res,
2493 nfs_release_seqid(data->o_arg.seqid);
2495 /* Set the create mode (note dependency on the session type) */
2496 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2497 if (data->o_arg.open_flags & O_EXCL) {
2498 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2499 if (clp->cl_mvops->minor_version == 0) {
2500 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2501 /* don't put an ACCESS op in OPEN compound if O_EXCL,
2502 * because ACCESS will return permission denied for
2503 * all bits until close */
2504 data->o_res.access_request = data->o_arg.access = 0;
2505 } else if (nfs4_has_persistent_session(clp))
2506 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2510 trace_nfs4_cached_open(data->state);
2513 task->tk_action = NULL;
2515 nfs4_sequence_done(task, &data->o_res.seq_res);
2518 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2520 struct nfs4_opendata *data = calldata;
2522 data->rpc_status = task->tk_status;
2524 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2527 if (task->tk_status == 0) {
2528 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2529 switch (data->o_res.f_attr->mode & S_IFMT) {
2533 data->rpc_status = -ELOOP;
2536 data->rpc_status = -EISDIR;
2539 data->rpc_status = -ENOTDIR;
2542 renew_lease(data->o_res.server, data->timestamp);
2543 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2544 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2546 data->rpc_done = true;
2549 static void nfs4_open_release(void *calldata)
2551 struct nfs4_opendata *data = calldata;
2552 struct nfs4_state *state = NULL;
2554 /* If this request hasn't been cancelled, do nothing */
2555 if (!data->cancelled)
2557 /* In case of error, no cleanup! */
2558 if (data->rpc_status != 0 || !data->rpc_done)
2560 /* In case we need an open_confirm, no cleanup! */
2561 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2563 state = nfs4_opendata_to_nfs4_state(data);
2565 nfs4_close_state(state, data->o_arg.fmode);
2567 nfs4_opendata_put(data);
2570 static const struct rpc_call_ops nfs4_open_ops = {
2571 .rpc_call_prepare = nfs4_open_prepare,
2572 .rpc_call_done = nfs4_open_done,
2573 .rpc_release = nfs4_open_release,
2576 static int nfs4_run_open_task(struct nfs4_opendata *data,
2577 struct nfs_open_context *ctx)
2579 struct inode *dir = d_inode(data->dir);
2580 struct nfs_server *server = NFS_SERVER(dir);
2581 struct nfs_openargs *o_arg = &data->o_arg;
2582 struct nfs_openres *o_res = &data->o_res;
2583 struct rpc_task *task;
2584 struct rpc_message msg = {
2585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2588 .rpc_cred = data->owner->so_cred,
2590 struct rpc_task_setup task_setup_data = {
2591 .rpc_client = server->client,
2592 .rpc_message = &msg,
2593 .callback_ops = &nfs4_open_ops,
2594 .callback_data = data,
2595 .workqueue = nfsiod_workqueue,
2596 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
2600 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE))
2601 task_setup_data.flags |= RPC_TASK_MOVEABLE;
2603 kref_get(&data->kref);
2604 data->rpc_done = false;
2605 data->rpc_status = 0;
2606 data->cancelled = false;
2607 data->is_recover = false;
2609 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
2610 data->is_recover = true;
2611 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2613 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2614 pnfs_lgopen_prepare(data, ctx);
2616 task = rpc_run_task(&task_setup_data);
2618 return PTR_ERR(task);
2619 status = rpc_wait_for_completion_task(task);
2621 data->cancelled = true;
2624 status = data->rpc_status;
2630 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2632 struct inode *dir = d_inode(data->dir);
2633 struct nfs_openres *o_res = &data->o_res;
2636 status = nfs4_run_open_task(data, NULL);
2637 if (status != 0 || !data->rpc_done)
2640 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2642 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2643 status = _nfs4_proc_open_confirm(data);
2649 * Additional permission checks in order to distinguish between an
2650 * open for read, and an open for execute. This works around the
2651 * fact that NFSv4 OPEN treats read and execute permissions as being
2653 * Note that in the non-execute case, we want to turn off permission
2654 * checking if we just created a new file (POSIX open() semantics).
2656 static int nfs4_opendata_access(const struct cred *cred,
2657 struct nfs4_opendata *opendata,
2658 struct nfs4_state *state, fmode_t fmode)
2660 struct nfs_access_entry cache;
2663 /* access call failed or for some reason the server doesn't
2664 * support any access modes -- defer access call until later */
2665 if (opendata->o_res.access_supported == 0)
2669 if (fmode & FMODE_EXEC) {
2670 /* ONLY check for exec rights */
2671 if (S_ISDIR(state->inode->i_mode))
2672 mask = NFS4_ACCESS_LOOKUP;
2674 mask = NFS4_ACCESS_EXECUTE;
2675 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2676 mask = NFS4_ACCESS_READ;
2678 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2679 nfs_access_add_cache(state->inode, &cache, cred);
2681 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2682 if ((mask & ~cache.mask & flags) == 0)
2689 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2691 static int _nfs4_proc_open(struct nfs4_opendata *data,
2692 struct nfs_open_context *ctx)
2694 struct inode *dir = d_inode(data->dir);
2695 struct nfs_server *server = NFS_SERVER(dir);
2696 struct nfs_openargs *o_arg = &data->o_arg;
2697 struct nfs_openres *o_res = &data->o_res;
2700 status = nfs4_run_open_task(data, ctx);
2701 if (!data->rpc_done)
2704 if (status == -NFS4ERR_BADNAME &&
2705 !(o_arg->open_flags & O_CREAT))
2710 nfs_fattr_map_and_free_names(server, &data->f_attr);
2712 if (o_arg->open_flags & O_CREAT) {
2713 if (o_arg->open_flags & O_EXCL)
2714 data->file_created = true;
2715 else if (o_res->cinfo.before != o_res->cinfo.after)
2716 data->file_created = true;
2717 if (data->file_created ||
2718 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2719 nfs4_update_changeattr(dir, &o_res->cinfo,
2720 o_res->f_attr->time_start,
2721 NFS_INO_INVALID_DATA);
2723 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2724 server->caps &= ~NFS_CAP_POSIX_LOCK;
2725 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2726 status = _nfs4_proc_open_confirm(data);
2730 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2731 struct nfs_fh *fh = &o_res->fh;
2733 nfs4_sequence_free_slot(&o_res->seq_res);
2734 if (o_arg->claim == NFS4_OPEN_CLAIM_FH)
2735 fh = NFS_FH(d_inode(data->dentry));
2736 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL);
2743 * reclaim state on the server after a network partition.
2744 * Assumes caller holds the appropriate lock
2746 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2748 struct nfs4_opendata *opendata;
2751 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH);
2752 if (IS_ERR(opendata))
2753 return PTR_ERR(opendata);
2755 * We're not recovering a delegation, so ask for no delegation.
2756 * Otherwise the recovery thread could deadlock with an outstanding
2757 * delegation return.
2759 opendata->o_arg.open_flags = O_DIRECT;
2760 ret = nfs4_open_recover(opendata, state);
2762 d_drop(ctx->dentry);
2763 nfs4_opendata_put(opendata);
2767 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2769 struct nfs_server *server = NFS_SERVER(state->inode);
2770 struct nfs4_exception exception = { };
2774 err = _nfs4_open_expired(ctx, state);
2775 trace_nfs4_open_expired(ctx, 0, err);
2776 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2781 case -NFS4ERR_GRACE:
2782 case -NFS4ERR_DELAY:
2783 nfs4_handle_exception(server, err, &exception);
2786 } while (exception.retry);
2791 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2793 struct nfs_open_context *ctx;
2796 ctx = nfs4_state_find_open_context(state);
2799 ret = nfs4_do_open_expired(ctx, state);
2800 put_nfs_open_context(ctx);
2804 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2805 const nfs4_stateid *stateid)
2807 nfs_remove_bad_delegation(state->inode, stateid);
2808 nfs_state_clear_delegation(state);
2811 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2813 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2814 nfs_finish_clear_delegation_stateid(state, NULL);
2817 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2819 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2820 nfs40_clear_delegation_stateid(state);
2821 nfs_state_clear_open_state_flags(state);
2822 return nfs4_open_expired(sp, state);
2825 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2826 nfs4_stateid *stateid,
2827 const struct cred *cred)
2829 return -NFS4ERR_BAD_STATEID;
2832 #if defined(CONFIG_NFS_V4_1)
2833 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2834 nfs4_stateid *stateid,
2835 const struct cred *cred)
2839 switch (stateid->type) {
2842 case NFS4_INVALID_STATEID_TYPE:
2843 case NFS4_SPECIAL_STATEID_TYPE:
2844 return -NFS4ERR_BAD_STATEID;
2845 case NFS4_REVOKED_STATEID_TYPE:
2849 status = nfs41_test_stateid(server, stateid, cred);
2851 case -NFS4ERR_EXPIRED:
2852 case -NFS4ERR_ADMIN_REVOKED:
2853 case -NFS4ERR_DELEG_REVOKED:
2859 /* Ack the revoked state to the server */
2860 nfs41_free_stateid(server, stateid, cred, true);
2861 return -NFS4ERR_EXPIRED;
2864 static int nfs41_check_delegation_stateid(struct nfs4_state *state)
2866 struct nfs_server *server = NFS_SERVER(state->inode);
2867 nfs4_stateid stateid;
2868 struct nfs_delegation *delegation;
2869 const struct cred *cred = NULL;
2870 int status, ret = NFS_OK;
2872 /* Get the delegation credential for use by test/free_stateid */
2874 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2875 if (delegation == NULL) {
2877 nfs_state_clear_delegation(state);
2881 spin_lock(&delegation->lock);
2882 nfs4_stateid_copy(&stateid, &delegation->stateid);
2884 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2885 &delegation->flags)) {
2886 spin_unlock(&delegation->lock);
2891 if (delegation->cred)
2892 cred = get_cred(delegation->cred);
2893 spin_unlock(&delegation->lock);
2895 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2896 trace_nfs4_test_delegation_stateid(state, NULL, status);
2897 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2898 nfs_finish_clear_delegation_stateid(state, &stateid);
2906 static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2910 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2911 nfs4_copy_delegation_stateid(state->inode, state->state,
2913 nfs4_stateid_match_other(&state->stateid, &tmp))
2914 nfs_state_set_delegation(state, &tmp, state->state);
2916 nfs_state_clear_delegation(state);
2920 * nfs41_check_expired_locks - possibly free a lock stateid
2922 * @state: NFSv4 state for an inode
2924 * Returns NFS_OK if recovery for this stateid is now finished.
2925 * Otherwise a negative NFS4ERR value is returned.
2927 static int nfs41_check_expired_locks(struct nfs4_state *state)
2929 int status, ret = NFS_OK;
2930 struct nfs4_lock_state *lsp, *prev = NULL;
2931 struct nfs_server *server = NFS_SERVER(state->inode);
2933 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2936 spin_lock(&state->state_lock);
2937 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2938 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2939 const struct cred *cred = lsp->ls_state->owner->so_cred;
2941 refcount_inc(&lsp->ls_count);
2942 spin_unlock(&state->state_lock);
2944 nfs4_put_lock_state(prev);
2947 status = nfs41_test_and_free_expired_stateid(server,
2950 trace_nfs4_test_lock_stateid(state, lsp, status);
2951 if (status == -NFS4ERR_EXPIRED ||
2952 status == -NFS4ERR_BAD_STATEID) {
2953 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2954 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2955 if (!recover_lost_locks)
2956 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2957 } else if (status != NFS_OK) {
2959 nfs4_put_lock_state(prev);
2962 spin_lock(&state->state_lock);
2965 spin_unlock(&state->state_lock);
2966 nfs4_put_lock_state(prev);
2972 * nfs41_check_open_stateid - possibly free an open stateid
2974 * @state: NFSv4 state for an inode
2976 * Returns NFS_OK if recovery for this stateid is now finished.
2977 * Otherwise a negative NFS4ERR value is returned.
2979 static int nfs41_check_open_stateid(struct nfs4_state *state)
2981 struct nfs_server *server = NFS_SERVER(state->inode);
2982 nfs4_stateid *stateid = &state->open_stateid;
2983 const struct cred *cred = state->owner->so_cred;
2986 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
2987 return -NFS4ERR_BAD_STATEID;
2988 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2989 trace_nfs4_test_open_stateid(state, NULL, status);
2990 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2991 nfs_state_clear_open_state_flags(state);
2992 stateid->type = NFS4_INVALID_STATEID_TYPE;
2995 if (nfs_open_stateid_recover_openmode(state))
2996 return -NFS4ERR_OPENMODE;
3000 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
3004 status = nfs41_check_delegation_stateid(state);
3005 if (status != NFS_OK)
3007 nfs41_delegation_recover_stateid(state);
3009 status = nfs41_check_expired_locks(state);
3010 if (status != NFS_OK)
3012 status = nfs41_check_open_stateid(state);
3013 if (status != NFS_OK)
3014 status = nfs4_open_expired(sp, state);
3020 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
3021 * fields corresponding to attributes that were used to store the verifier.
3022 * Make sure we clobber those fields in the later setattr call
3024 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
3025 struct iattr *sattr, struct nfs4_label **label)
3027 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
3032 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
3033 attrset[i] = opendata->o_res.attrset[i];
3034 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
3035 attrset[i] &= ~bitmask[i];
3038 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
3039 sattr->ia_valid : 0;
3041 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
3042 if (sattr->ia_valid & ATTR_ATIME_SET)
3043 ret |= ATTR_ATIME_SET;
3048 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
3049 if (sattr->ia_valid & ATTR_MTIME_SET)
3050 ret |= ATTR_MTIME_SET;
3055 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
3060 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
3061 struct nfs_open_context *ctx)
3063 struct nfs4_state_owner *sp = opendata->owner;
3064 struct nfs_server *server = sp->so_server;
3065 struct dentry *dentry;
3066 struct nfs4_state *state;
3067 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
3068 struct inode *dir = d_inode(opendata->dir);
3069 unsigned long dir_verifier;
3073 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
3074 dir_verifier = nfs_save_change_attribute(dir);
3076 ret = _nfs4_proc_open(opendata, ctx);
3080 state = _nfs4_opendata_to_nfs4_state(opendata);
3081 ret = PTR_ERR(state);
3085 if (server->caps & NFS_CAP_POSIX_LOCK)
3086 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
3087 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3088 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
3089 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED)
3090 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags);
3092 dentry = opendata->dentry;
3093 if (d_really_is_negative(dentry)) {
3094 struct dentry *alias;
3096 alias = d_exact_alias(dentry, state->inode);
3098 alias = d_splice_alias(igrab(state->inode), dentry);
3099 /* d_splice_alias() can't fail here - it's a non-directory */
3102 ctx->dentry = dentry = alias;
3106 switch(opendata->o_arg.claim) {
3109 case NFS4_OPEN_CLAIM_NULL:
3110 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3111 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3112 if (!opendata->rpc_done)
3114 if (opendata->o_res.delegation_type != 0)
3115 dir_verifier = nfs_save_change_attribute(dir);
3116 nfs_set_verifier(dentry, dir_verifier);
3119 /* Parse layoutget results before we check for access */
3120 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3122 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode);
3126 if (d_inode(dentry) == state->inode) {
3127 nfs_inode_attach_open_context(ctx);
3128 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3129 nfs4_schedule_stateid_recovery(server, state);
3133 if (!opendata->cancelled) {
3134 if (opendata->lgp) {
3135 nfs4_lgopen_release(opendata->lgp);
3136 opendata->lgp = NULL;
3138 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
3144 * Returns a referenced nfs4_state
3146 static int _nfs4_do_open(struct inode *dir,
3147 struct nfs_open_context *ctx,
3149 const struct nfs4_open_createattrs *c,
3152 struct nfs4_state_owner *sp;
3153 struct nfs4_state *state = NULL;
3154 struct nfs_server *server = NFS_SERVER(dir);
3155 struct nfs4_opendata *opendata;
3156 struct dentry *dentry = ctx->dentry;
3157 const struct cred *cred = ctx->cred;
3158 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
3159 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
3160 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
3161 struct iattr *sattr = c->sattr;
3162 struct nfs4_label *label = c->label;
3165 /* Protect against reboot recovery conflicts */
3167 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3169 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3172 status = nfs4_client_recover_expired_lease(server->nfs_client);
3174 goto err_put_state_owner;
3175 if (d_really_is_positive(dentry))
3176 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
3178 if (d_really_is_positive(dentry))
3179 claim = NFS4_OPEN_CLAIM_FH;
3180 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3181 c, claim, GFP_KERNEL);
3182 if (opendata == NULL)
3183 goto err_put_state_owner;
3185 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3186 if (!opendata->f_attr.mdsthreshold) {
3187 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3188 if (!opendata->f_attr.mdsthreshold)
3189 goto err_opendata_put;
3191 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
3193 if (d_really_is_positive(dentry))
3194 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
3196 status = _nfs4_open_and_get_state(opendata, ctx);
3198 goto err_opendata_put;
3201 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
3202 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
3203 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
3205 * send create attributes which was not set by open
3206 * with an extra setattr.
3208 if (attrs || label) {
3209 unsigned ia_old = sattr->ia_valid;
3211 sattr->ia_valid = attrs;
3212 nfs_fattr_init(opendata->o_res.f_attr);
3213 status = nfs4_do_setattr(state->inode, cred,
3214 opendata->o_res.f_attr, sattr,
3217 nfs_setattr_update_inode(state->inode, sattr,
3218 opendata->o_res.f_attr);
3219 nfs_setsecurity(state->inode, opendata->o_res.f_attr);
3221 sattr->ia_valid = ia_old;
3224 if (opened && opendata->file_created)
3227 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
3228 *ctx_th = opendata->f_attr.mdsthreshold;
3229 opendata->f_attr.mdsthreshold = NULL;
3232 nfs4_opendata_put(opendata);
3233 nfs4_put_state_owner(sp);
3236 nfs4_opendata_put(opendata);
3237 err_put_state_owner:
3238 nfs4_put_state_owner(sp);
3244 static struct nfs4_state *nfs4_do_open(struct inode *dir,
3245 struct nfs_open_context *ctx,
3247 struct iattr *sattr,
3248 struct nfs4_label *label,
3251 struct nfs_server *server = NFS_SERVER(dir);
3252 struct nfs4_exception exception = {
3253 .interruptible = true,
3255 struct nfs4_state *res;
3256 struct nfs4_open_createattrs c = {
3260 [0] = (__u32)jiffies,
3261 [1] = (__u32)current->pid,
3267 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3269 trace_nfs4_open_file(ctx, flags, status);
3272 /* NOTE: BAD_SEQID means the server and client disagree about the
3273 * book-keeping w.r.t. state-changing operations
3274 * (OPEN/CLOSE/LOCK/LOCKU...)
3275 * It is actually a sign of a bug on the client or on the server.
3277 * If we receive a BAD_SEQID error in the particular case of
3278 * doing an OPEN, we assume that nfs_increment_open_seqid() will
3279 * have unhashed the old state_owner for us, and that we can
3280 * therefore safely retry using a new one. We should still warn
3281 * the user though...
3283 if (status == -NFS4ERR_BAD_SEQID) {
3284 pr_warn_ratelimited("NFS: v4 server %s "
3285 " returned a bad sequence-id error!\n",
3286 NFS_SERVER(dir)->nfs_client->cl_hostname);
3287 exception.retry = 1;
3291 * BAD_STATEID on OPEN means that the server cancelled our
3292 * state before it received the OPEN_CONFIRM.
3293 * Recover by retrying the request as per the discussion
3294 * on Page 181 of RFC3530.
3296 if (status == -NFS4ERR_BAD_STATEID) {
3297 exception.retry = 1;
3300 if (status == -NFS4ERR_EXPIRED) {
3301 nfs4_schedule_lease_recovery(server->nfs_client);
3302 exception.retry = 1;
3305 if (status == -EAGAIN) {
3306 /* We must have found a delegation */
3307 exception.retry = 1;
3310 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3312 res = ERR_PTR(nfs4_handle_exception(server,
3313 status, &exception));
3314 } while (exception.retry);
3318 static int _nfs4_do_setattr(struct inode *inode,
3319 struct nfs_setattrargs *arg,
3320 struct nfs_setattrres *res,
3321 const struct cred *cred,
3322 struct nfs_open_context *ctx)
3324 struct nfs_server *server = NFS_SERVER(inode);
3325 struct rpc_message msg = {
3326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3331 const struct cred *delegation_cred = NULL;
3332 unsigned long timestamp = jiffies;
3336 nfs_fattr_init(res->fattr);
3338 /* Servers should only apply open mode checks for file size changes */
3339 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3341 nfs4_inode_make_writeable(inode);
3345 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
3346 /* Use that stateid */
3347 } else if (ctx != NULL && ctx->state) {
3348 struct nfs_lock_context *l_ctx;
3349 if (!nfs4_valid_open_stateid(ctx->state))
3351 l_ctx = nfs_get_lock_context(ctx);
3353 return PTR_ERR(l_ctx);
3354 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3355 &arg->stateid, &delegation_cred);
3356 nfs_put_lock_context(l_ctx);
3359 else if (status == -EAGAIN)
3363 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3365 if (delegation_cred)
3366 msg.rpc_cred = delegation_cred;
3368 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3370 put_cred(delegation_cred);
3371 if (status == 0 && ctx != NULL)
3372 renew_lease(server, timestamp);
3373 trace_nfs4_setattr(inode, &arg->stateid, status);
3377 static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
3378 struct nfs_fattr *fattr, struct iattr *sattr,
3379 struct nfs_open_context *ctx, struct nfs4_label *ilabel)
3381 struct nfs_server *server = NFS_SERVER(inode);
3382 __u32 bitmask[NFS4_BITMASK_SZ];
3383 struct nfs4_state *state = ctx ? ctx->state : NULL;
3384 struct nfs_setattrargs arg = {
3385 .fh = NFS_FH(inode),
3391 struct nfs_setattrres res = {
3395 struct nfs4_exception exception = {
3398 .stateid = &arg.stateid,
3400 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE;
3403 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID))
3404 adjust_flags |= NFS_INO_INVALID_MODE;
3405 if (sattr->ia_valid & (ATTR_UID | ATTR_GID))
3406 adjust_flags |= NFS_INO_INVALID_OTHER;
3409 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label),
3410 inode, adjust_flags);
3412 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3414 case -NFS4ERR_OPENMODE:
3415 if (!(sattr->ia_valid & ATTR_SIZE)) {
3416 pr_warn_once("NFSv4: server %s is incorrectly "
3417 "applying open mode checks to "
3418 "a SETATTR that is not "
3419 "changing file size.\n",
3420 server->nfs_client->cl_hostname);
3422 if (state && !(state->state & FMODE_WRITE)) {
3424 if (sattr->ia_valid & ATTR_OPEN)
3429 err = nfs4_handle_exception(server, err, &exception);
3430 } while (exception.retry);
3436 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3438 if (inode == NULL || !nfs_have_layout(inode))
3441 return pnfs_wait_on_layoutreturn(inode, task);
3445 * Update the seqid of an open stateid
3447 static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3448 struct nfs4_state *state)
3455 if (!nfs4_valid_open_stateid(state))
3457 seq = read_seqbegin(&state->seqlock);
3458 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3459 nfs4_stateid_copy(dst, &state->open_stateid);
3460 if (read_seqretry(&state->seqlock, seq))
3464 seqid_open = state->open_stateid.seqid;
3465 if (read_seqretry(&state->seqlock, seq))
3468 dst_seqid = be32_to_cpu(dst->seqid);
3469 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3470 dst->seqid = seqid_open;
3476 * Update the seqid of an open stateid after receiving
3477 * NFS4ERR_OLD_STATEID
3479 static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3480 struct nfs4_state *state)
3485 int seq, status = -EAGAIN;
3490 if (!nfs4_valid_open_stateid(state))
3492 seq = read_seqbegin(&state->seqlock);
3493 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3494 if (read_seqretry(&state->seqlock, seq))
3499 write_seqlock(&state->seqlock);
3500 seqid_open = state->open_stateid.seqid;
3502 dst_seqid = be32_to_cpu(dst->seqid);
3504 /* Did another OPEN bump the state's seqid? try again: */
3505 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
3506 dst->seqid = seqid_open;
3507 write_sequnlock(&state->seqlock);
3512 /* server says we're behind but we haven't seen the update yet */
3513 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3514 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3515 write_sequnlock(&state->seqlock);
3516 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3518 if (fatal_signal_pending(current))
3521 if (schedule_timeout(5*HZ) != 0)
3524 finish_wait(&state->waitq, &wait);
3528 if (status == -EINTR)
3531 /* we slept the whole 5 seconds, we must have lost a seqid */
3532 dst->seqid = cpu_to_be32(dst_seqid + 1);
3540 struct nfs4_closedata {
3541 struct inode *inode;
3542 struct nfs4_state *state;
3543 struct nfs_closeargs arg;
3544 struct nfs_closeres res;
3546 struct nfs4_layoutreturn_args arg;
3547 struct nfs4_layoutreturn_res res;
3548 struct nfs4_xdr_opaque_data ld_private;
3552 struct nfs_fattr fattr;
3553 unsigned long timestamp;
3556 static void nfs4_free_closedata(void *data)
3558 struct nfs4_closedata *calldata = data;
3559 struct nfs4_state_owner *sp = calldata->state->owner;
3560 struct super_block *sb = calldata->state->inode->i_sb;
3562 if (calldata->lr.roc)
3563 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3564 calldata->res.lr_ret);
3565 nfs4_put_open_state(calldata->state);
3566 nfs_free_seqid(calldata->arg.seqid);
3567 nfs4_put_state_owner(sp);
3568 nfs_sb_deactive(sb);
3572 static void nfs4_close_done(struct rpc_task *task, void *data)
3574 struct nfs4_closedata *calldata = data;
3575 struct nfs4_state *state = calldata->state;
3576 struct nfs_server *server = NFS_SERVER(calldata->inode);
3577 nfs4_stateid *res_stateid = NULL;
3578 struct nfs4_exception exception = {
3580 .inode = calldata->inode,
3581 .stateid = &calldata->arg.stateid,
3584 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3586 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3588 /* Handle Layoutreturn errors */
3589 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res,
3590 &calldata->res.lr_ret) == -EAGAIN)
3593 /* hmm. we are done with the inode, and in the process of freeing
3594 * the state_owner. we keep this around to process errors
3596 switch (task->tk_status) {
3598 res_stateid = &calldata->res.stateid;
3599 renew_lease(server, calldata->timestamp);
3601 case -NFS4ERR_ACCESS:
3602 if (calldata->arg.bitmask != NULL) {
3603 calldata->arg.bitmask = NULL;
3604 calldata->res.fattr = NULL;
3609 case -NFS4ERR_OLD_STATEID:
3610 /* Did we race with OPEN? */
3611 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
3615 case -NFS4ERR_ADMIN_REVOKED:
3616 case -NFS4ERR_STALE_STATEID:
3617 case -NFS4ERR_EXPIRED:
3618 nfs4_free_revoked_stateid(server,
3619 &calldata->arg.stateid,
3620 task->tk_msg.rpc_cred);
3622 case -NFS4ERR_BAD_STATEID:
3623 if (calldata->arg.fmode == 0)
3627 task->tk_status = nfs4_async_handle_exception(task,
3628 server, task->tk_status, &exception);
3629 if (exception.retry)
3632 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3633 res_stateid, calldata->arg.fmode);
3635 task->tk_status = 0;
3636 nfs_release_seqid(calldata->arg.seqid);
3637 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3638 dprintk("%s: ret = %d\n", __func__, task->tk_status);
3641 task->tk_status = 0;
3642 rpc_restart_call_prepare(task);
3646 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3648 struct nfs4_closedata *calldata = data;
3649 struct nfs4_state *state = calldata->state;
3650 struct inode *inode = calldata->inode;
3651 struct nfs_server *server = NFS_SERVER(inode);
3652 struct pnfs_layout_hdr *lo;
3653 bool is_rdonly, is_wronly, is_rdwr;
3656 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3659 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3660 spin_lock(&state->owner->so_lock);
3661 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3662 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3663 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3664 /* Calculate the change in open mode */
3665 calldata->arg.fmode = 0;
3666 if (state->n_rdwr == 0) {
3667 if (state->n_rdonly == 0)
3668 call_close |= is_rdonly;
3670 calldata->arg.fmode |= FMODE_READ;
3671 if (state->n_wronly == 0)
3672 call_close |= is_wronly;
3674 calldata->arg.fmode |= FMODE_WRITE;
3675 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3676 call_close |= is_rdwr;
3678 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3680 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3681 if (!nfs4_valid_open_stateid(state))
3683 spin_unlock(&state->owner->so_lock);
3686 /* Note: exit _without_ calling nfs4_close_done */
3690 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3691 nfs_release_seqid(calldata->arg.seqid);
3695 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3696 if (lo && !pnfs_layout_is_valid(lo)) {
3697 calldata->arg.lr_args = NULL;
3698 calldata->res.lr_res = NULL;
3701 if (calldata->arg.fmode == 0)
3702 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3704 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3705 /* Close-to-open cache consistency revalidation */
3706 if (!nfs4_have_delegation(inode, FMODE_READ)) {
3707 nfs4_bitmask_set(calldata->arg.bitmask_store,
3708 server->cache_consistency_bitmask,
3710 calldata->arg.bitmask = calldata->arg.bitmask_store;
3712 calldata->arg.bitmask = NULL;
3715 calldata->arg.share_access =
3716 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3717 calldata->arg.fmode, 0);
3719 if (calldata->res.fattr == NULL)
3720 calldata->arg.bitmask = NULL;
3721 else if (calldata->arg.bitmask == NULL)
3722 calldata->res.fattr = NULL;
3723 calldata->timestamp = jiffies;
3724 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3725 &calldata->arg.seq_args,
3726 &calldata->res.seq_res,
3728 nfs_release_seqid(calldata->arg.seqid);
3731 task->tk_action = NULL;
3733 nfs4_sequence_done(task, &calldata->res.seq_res);
3736 static const struct rpc_call_ops nfs4_close_ops = {
3737 .rpc_call_prepare = nfs4_close_prepare,
3738 .rpc_call_done = nfs4_close_done,
3739 .rpc_release = nfs4_free_closedata,
3743 * It is possible for data to be read/written from a mem-mapped file
3744 * after the sys_close call (which hits the vfs layer as a flush).
3745 * This means that we can't safely call nfsv4 close on a file until
3746 * the inode is cleared. This in turn means that we are not good
3747 * NFSv4 citizens - we do not indicate to the server to update the file's
3748 * share state even when we are done with one of the three share
3749 * stateid's in the inode.
3751 * NOTE: Caller must be holding the sp->so_owner semaphore!
3753 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3755 struct nfs_server *server = NFS_SERVER(state->inode);
3756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3757 struct nfs4_closedata *calldata;
3758 struct nfs4_state_owner *sp = state->owner;
3759 struct rpc_task *task;
3760 struct rpc_message msg = {
3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3762 .rpc_cred = state->owner->so_cred,
3764 struct rpc_task_setup task_setup_data = {
3765 .rpc_client = server->client,
3766 .rpc_message = &msg,
3767 .callback_ops = &nfs4_close_ops,
3768 .workqueue = nfsiod_workqueue,
3769 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
3771 int status = -ENOMEM;
3773 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE))
3774 task_setup_data.flags |= RPC_TASK_MOVEABLE;
3776 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3777 &task_setup_data.rpc_client, &msg);
3779 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3780 if (calldata == NULL)
3782 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
3783 calldata->inode = state->inode;
3784 calldata->state = state;
3785 calldata->arg.fh = NFS_FH(state->inode);
3786 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3787 goto out_free_calldata;
3788 /* Serialization for the sequence id */
3789 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3790 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3791 if (IS_ERR(calldata->arg.seqid))
3792 goto out_free_calldata;
3793 nfs_fattr_init(&calldata->fattr);
3794 calldata->arg.fmode = 0;
3795 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3796 calldata->res.fattr = &calldata->fattr;
3797 calldata->res.seqid = calldata->arg.seqid;
3798 calldata->res.server = server;
3799 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3800 calldata->lr.roc = pnfs_roc(state->inode,
3801 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3802 if (calldata->lr.roc) {
3803 calldata->arg.lr_args = &calldata->lr.arg;
3804 calldata->res.lr_res = &calldata->lr.res;
3806 nfs_sb_active(calldata->inode->i_sb);
3808 msg.rpc_argp = &calldata->arg;
3809 msg.rpc_resp = &calldata->res;
3810 task_setup_data.callback_data = calldata;
3811 task = rpc_run_task(&task_setup_data);
3813 return PTR_ERR(task);
3816 status = rpc_wait_for_completion_task(task);
3822 nfs4_put_open_state(state);
3823 nfs4_put_state_owner(sp);
3827 static struct inode *
3828 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3829 int open_flags, struct iattr *attr, int *opened)
3831 struct nfs4_state *state;
3832 struct nfs4_label l, *label;
3834 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3836 /* Protect against concurrent sillydeletes */
3837 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3839 nfs4_label_release_security(label);
3842 return ERR_CAST(state);
3843 return state->inode;
3846 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3848 if (ctx->state == NULL)
3851 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
3853 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
3856 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3857 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3858 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
3860 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3862 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3863 struct nfs4_server_caps_arg args = {
3867 struct nfs4_server_caps_res res = {};
3868 struct rpc_message msg = {
3869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3876 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3877 FATTR4_WORD0_FH_EXPIRE_TYPE |
3878 FATTR4_WORD0_LINK_SUPPORT |
3879 FATTR4_WORD0_SYMLINK_SUPPORT |
3880 FATTR4_WORD0_ACLSUPPORT |
3881 FATTR4_WORD0_CASE_INSENSITIVE |
3882 FATTR4_WORD0_CASE_PRESERVING;
3884 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3886 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3888 /* Sanity check the server answers */
3889 switch (minorversion) {
3891 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3892 res.attr_bitmask[2] = 0;
3895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3898 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3900 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3901 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS |
3902 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL);
3903 server->fattr_valid = NFS_ATTR_FATTR_V4;
3904 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3905 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3906 server->caps |= NFS_CAP_ACLS;
3907 if (res.has_links != 0)
3908 server->caps |= NFS_CAP_HARDLINKS;
3909 if (res.has_symlinks != 0)
3910 server->caps |= NFS_CAP_SYMLINKS;
3911 if (res.case_insensitive)
3912 server->caps |= NFS_CAP_CASE_INSENSITIVE;
3913 if (res.case_preserving)
3914 server->caps |= NFS_CAP_CASE_PRESERVING;
3915 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3916 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3917 server->caps |= NFS_CAP_SECURITY_LABEL;
3919 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS)
3920 server->caps |= NFS_CAP_FS_LOCATIONS;
3921 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID))
3922 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID;
3923 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE))
3924 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE;
3925 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS))
3926 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK;
3927 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER))
3928 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER |
3929 NFS_ATTR_FATTR_OWNER_NAME);
3930 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP))
3931 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP |
3932 NFS_ATTR_FATTR_GROUP_NAME);
3933 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED))
3934 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED;
3935 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS))
3936 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME;
3937 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA))
3938 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME;
3939 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY))
3940 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME;
3941 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3942 sizeof(server->attr_bitmask));
3943 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3945 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3946 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3947 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3948 server->cache_consistency_bitmask[2] = 0;
3950 /* Avoid a regression due to buggy server */
3951 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3952 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3953 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3954 sizeof(server->exclcreat_bitmask));
3956 server->acl_bitmask = res.acl_bitmask;
3957 server->fh_expire_type = res.fh_expire_type;
3963 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3965 struct nfs4_exception exception = {
3966 .interruptible = true,
3970 nfs4_server_set_init_caps(server);
3972 err = nfs4_handle_exception(server,
3973 _nfs4_server_capabilities(server, fhandle),
3975 } while (exception.retry);
3979 static void test_fs_location_for_trunking(struct nfs4_fs_location *location,
3980 struct nfs_client *clp,
3981 struct nfs_server *server)
3985 for (i = 0; i < location->nservers; i++) {
3986 struct nfs4_string *srv_loc = &location->servers[i];
3987 struct sockaddr_storage addr;
3989 struct xprt_create xprt_args = {
3993 struct nfs4_add_xprt_data xprtdata = {
3996 struct rpc_add_xprt_test rpcdata = {
3997 .add_xprt_test = clp->cl_mvops->session_trunk,
4000 char *servername = NULL;
4005 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len,
4006 &addr, sizeof(addr),
4007 clp->cl_net, server->port);
4010 xprt_args.dstaddr = (struct sockaddr *)&addr;
4011 xprt_args.addrlen = addrlen;
4012 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL);
4015 memcpy(servername, srv_loc->data, srv_loc->len);
4016 servername[srv_loc->len] = '\0';
4017 xprt_args.servername = servername;
4019 xprtdata.cred = nfs4_get_clid_cred(clp);
4020 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
4021 rpc_clnt_setup_test_and_add_xprt,
4024 put_cred(xprtdata.cred);
4029 static int _nfs4_discover_trunking(struct nfs_server *server,
4030 struct nfs_fh *fhandle)
4032 struct nfs4_fs_locations *locations = NULL;
4034 const struct cred *cred;
4035 struct nfs_client *clp = server->nfs_client;
4036 const struct nfs4_state_maintenance_ops *ops =
4037 clp->cl_mvops->state_renewal_ops;
4038 int status = -ENOMEM, i;
4040 cred = ops->get_state_renewal_cred(clp);
4042 cred = nfs4_get_clid_cred(clp);
4047 page = alloc_page(GFP_KERNEL);
4050 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4053 locations->fattr = nfs_alloc_fattr();
4054 if (!locations->fattr)
4057 status = nfs4_proc_get_locations(server, fhandle, locations, page,
4062 for (i = 0; i < locations->nlocations; i++)
4063 test_fs_location_for_trunking(&locations->locations[i], clp,
4066 kfree(locations->fattr);
4076 static int nfs4_discover_trunking(struct nfs_server *server,
4077 struct nfs_fh *fhandle)
4079 struct nfs4_exception exception = {
4080 .interruptible = true,
4082 struct nfs_client *clp = server->nfs_client;
4085 if (!nfs4_has_session(clp))
4088 err = nfs4_handle_exception(server,
4089 _nfs4_discover_trunking(server, fhandle),
4091 } while (exception.retry);
4096 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4097 struct nfs_fsinfo *info)
4100 struct nfs4_lookup_root_arg args = {
4103 struct nfs4_lookup_res res = {
4105 .fattr = info->fattr,
4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
4114 bitmask[0] = nfs4_fattr_bitmap[0];
4115 bitmask[1] = nfs4_fattr_bitmap[1];
4117 * Process the label in the upcoming getfattr
4119 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
4121 nfs_fattr_init(info->fattr);
4122 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4125 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4126 struct nfs_fsinfo *info)
4128 struct nfs4_exception exception = {
4129 .interruptible = true,
4133 err = _nfs4_lookup_root(server, fhandle, info);
4134 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
4137 case -NFS4ERR_WRONGSEC:
4140 err = nfs4_handle_exception(server, err, &exception);
4142 } while (exception.retry);
4147 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
4148 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
4150 struct rpc_auth_create_args auth_args = {
4151 .pseudoflavor = flavor,
4153 struct rpc_auth *auth;
4155 auth = rpcauth_create(&auth_args, server->client);
4158 return nfs4_lookup_root(server, fhandle, info);
4162 * Retry pseudoroot lookup with various security flavors. We do this when:
4164 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
4165 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
4167 * Returns zero on success, or a negative NFS4ERR value, or a
4168 * negative errno value.
4170 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
4171 struct nfs_fsinfo *info)
4173 /* Per 3530bis 15.33.5 */
4174 static const rpc_authflavor_t flav_array[] = {
4178 RPC_AUTH_UNIX, /* courtesy */
4181 int status = -EPERM;
4184 if (server->auth_info.flavor_len > 0) {
4185 /* try each flavor specified by user */
4186 for (i = 0; i < server->auth_info.flavor_len; i++) {
4187 status = nfs4_lookup_root_sec(server, fhandle, info,
4188 server->auth_info.flavors[i]);
4189 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4194 /* no flavors specified by user, try default list */
4195 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4196 status = nfs4_lookup_root_sec(server, fhandle, info,
4198 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4205 * -EACCES could mean that the user doesn't have correct permissions
4206 * to access the mount. It could also mean that we tried to mount
4207 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
4208 * existing mount programs don't handle -EACCES very well so it should
4209 * be mapped to -EPERM instead.
4211 if (status == -EACCES)
4217 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
4218 * @server: initialized nfs_server handle
4219 * @fhandle: we fill in the pseudo-fs root file handle
4220 * @info: we fill in an FSINFO struct
4221 * @auth_probe: probe the auth flavours
4223 * Returns zero on success, or a negative errno.
4225 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
4226 struct nfs_fsinfo *info,
4232 status = nfs4_lookup_root(server, fhandle, info);
4234 if (auth_probe || status == NFS4ERR_WRONGSEC)
4235 status = server->nfs_client->cl_mvops->find_root_sec(server,
4239 status = nfs4_server_capabilities(server, fhandle);
4241 status = nfs4_do_fsinfo(server, fhandle, info);
4243 return nfs4_map_errors(status);
4246 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4247 struct nfs_fsinfo *info)
4250 struct nfs_fattr *fattr = info->fattr;
4252 error = nfs4_server_capabilities(server, mntfh);
4254 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4258 error = nfs4_proc_getattr(server, mntfh, fattr, NULL);
4260 dprintk("nfs4_get_root: getattr error = %d\n", -error);
4264 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4265 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4266 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4273 * Get locations and (maybe) other attributes of a referral.
4274 * Note that we'll actually follow the referral later when
4275 * we detect fsid mismatch in inode revalidation
4277 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4278 const struct qstr *name, struct nfs_fattr *fattr,
4279 struct nfs_fh *fhandle)
4281 int status = -ENOMEM;
4282 struct page *page = NULL;
4283 struct nfs4_fs_locations *locations = NULL;
4285 page = alloc_page(GFP_KERNEL);
4288 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4289 if (locations == NULL)
4292 locations->fattr = fattr;
4294 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
4299 * If the fsid didn't change, this is a migration event, not a
4300 * referral. Cause us to drop into the exception handler, which
4301 * will kick off migration recovery.
4303 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) {
4304 dprintk("%s: server did not return a different fsid for"
4305 " a referral at %s\n", __func__, name->name);
4306 status = -NFS4ERR_MOVED;
4309 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4310 nfs_fixup_referral_attributes(fattr);
4311 memset(fhandle, 0, sizeof(struct nfs_fh));
4319 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4320 struct nfs_fattr *fattr, struct inode *inode)
4322 __u32 bitmask[NFS4_BITMASK_SZ];
4323 struct nfs4_getattr_arg args = {
4327 struct nfs4_getattr_res res = {
4331 struct rpc_message msg = {
4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4336 unsigned short task_flags = 0;
4338 if (nfs4_has_session(server->nfs_client))
4339 task_flags = RPC_TASK_MOVEABLE;
4341 /* Is this is an attribute revalidation, subject to softreval? */
4342 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4343 task_flags |= RPC_TASK_TIMEOUT;
4345 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0);
4346 nfs_fattr_init(fattr);
4347 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4348 return nfs4_do_call_sync(server->client, server, &msg,
4349 &args.seq_args, &res.seq_res, task_flags);
4352 int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
4353 struct nfs_fattr *fattr, struct inode *inode)
4355 struct nfs4_exception exception = {
4356 .interruptible = true,
4360 err = _nfs4_proc_getattr(server, fhandle, fattr, inode);
4361 trace_nfs4_getattr(server, fhandle, fattr, err);
4362 err = nfs4_handle_exception(server, err,
4364 } while (exception.retry);
4369 * The file is not closed if it is opened due to the a request to change
4370 * the size of the file. The open call will not be needed once the
4371 * VFS layer lookup-intents are implemented.
4373 * Close is called when the inode is destroyed.
4374 * If we haven't opened the file for O_WRONLY, we
4375 * need to in the size_change case to obtain a stateid.
4378 * Because OPEN is always done by name in nfsv4, it is
4379 * possible that we opened a different file by the same
4380 * name. We can recognize this race condition, but we
4381 * can't do anything about it besides returning an error.
4383 * This will be fixed with VFS changes (lookup-intent).
4386 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4387 struct iattr *sattr)
4389 struct inode *inode = d_inode(dentry);
4390 const struct cred *cred = NULL;
4391 struct nfs_open_context *ctx = NULL;
4394 if (pnfs_ld_layoutret_on_setattr(inode) &&
4395 sattr->ia_valid & ATTR_SIZE &&
4396 sattr->ia_size < i_size_read(inode))
4397 pnfs_commit_and_return_layout(inode);
4399 nfs_fattr_init(fattr);
4401 /* Deal with open(O_TRUNC) */
4402 if (sattr->ia_valid & ATTR_OPEN)
4403 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
4405 /* Optimization: if the end result is no change, don't RPC */
4406 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
4409 /* Search for an existing open(O_WRITE) file */
4410 if (sattr->ia_valid & ATTR_FILE) {
4412 ctx = nfs_file_open_context(sattr->ia_file);
4417 /* Return any delegations if we're going to change ACLs */
4418 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
4419 nfs4_inode_make_writeable(inode);
4421 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL);
4423 nfs_setattr_update_inode(inode, sattr, fattr);
4424 nfs_setsecurity(inode, fattr);
4429 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4430 struct dentry *dentry, struct nfs_fh *fhandle,
4431 struct nfs_fattr *fattr)
4433 struct nfs_server *server = NFS_SERVER(dir);
4435 struct nfs4_lookup_arg args = {
4436 .bitmask = server->attr_bitmask,
4437 .dir_fh = NFS_FH(dir),
4438 .name = &dentry->d_name,
4440 struct nfs4_lookup_res res = {
4445 struct rpc_message msg = {
4446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4450 unsigned short task_flags = 0;
4452 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE))
4453 task_flags = RPC_TASK_MOVEABLE;
4455 /* Is this is an attribute revalidation, subject to softreval? */
4456 if (nfs_lookup_is_soft_revalidate(dentry))
4457 task_flags |= RPC_TASK_TIMEOUT;
4459 args.bitmask = nfs4_bitmask(server, fattr->label);
4461 nfs_fattr_init(fattr);
4463 dprintk("NFS call lookup %pd2\n", dentry);
4464 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4465 status = nfs4_do_call_sync(clnt, server, &msg,
4466 &args.seq_args, &res.seq_res, task_flags);
4467 dprintk("NFS reply lookup: %d\n", status);
4471 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
4473 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4474 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
4475 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4479 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
4480 struct dentry *dentry, struct nfs_fh *fhandle,
4481 struct nfs_fattr *fattr)
4483 struct nfs4_exception exception = {
4484 .interruptible = true,
4486 struct rpc_clnt *client = *clnt;
4487 const struct qstr *name = &dentry->d_name;
4490 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr);
4491 trace_nfs4_lookup(dir, name, err);
4493 case -NFS4ERR_BADNAME:
4496 case -NFS4ERR_MOVED:
4497 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
4498 if (err == -NFS4ERR_MOVED)
4499 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4501 case -NFS4ERR_WRONGSEC:
4503 if (client != *clnt)
4505 client = nfs4_negotiate_security(client, dir, name);
4507 return PTR_ERR(client);
4509 exception.retry = 1;
4512 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4514 } while (exception.retry);
4519 else if (client != *clnt)
4520 rpc_shutdown_client(client);
4525 static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
4526 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4529 struct rpc_clnt *client = NFS_CLIENT(dir);
4531 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr);
4532 if (client != NFS_CLIENT(dir)) {
4533 rpc_shutdown_client(client);
4534 nfs_fixup_secinfo_attributes(fattr);
4540 nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
4541 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4543 struct rpc_clnt *client = NFS_CLIENT(dir);
4546 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr);
4548 return ERR_PTR(status);
4549 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
4552 static int _nfs4_proc_lookupp(struct inode *inode,
4553 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4555 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4556 struct nfs_server *server = NFS_SERVER(inode);
4558 struct nfs4_lookupp_arg args = {
4559 .bitmask = server->attr_bitmask,
4560 .fh = NFS_FH(inode),
4562 struct nfs4_lookupp_res res = {
4567 struct rpc_message msg = {
4568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4572 unsigned short task_flags = 0;
4574 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
4575 task_flags |= RPC_TASK_TIMEOUT;
4577 args.bitmask = nfs4_bitmask(server, fattr->label);
4579 nfs_fattr_init(fattr);
4581 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4582 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4583 &res.seq_res, task_flags);
4584 dprintk("NFS reply lookupp: %d\n", status);
4588 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4589 struct nfs_fattr *fattr)
4591 struct nfs4_exception exception = {
4592 .interruptible = true,
4596 err = _nfs4_proc_lookupp(inode, fhandle, fattr);
4597 trace_nfs4_lookupp(inode, err);
4598 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4600 } while (exception.retry);
4604 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry,
4605 const struct cred *cred)
4607 struct nfs_server *server = NFS_SERVER(inode);
4608 struct nfs4_accessargs args = {
4609 .fh = NFS_FH(inode),
4610 .access = entry->mask,
4612 struct nfs4_accessres res = {
4615 struct rpc_message msg = {
4616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4623 if (!nfs4_have_delegation(inode, FMODE_READ)) {
4624 res.fattr = nfs_alloc_fattr();
4625 if (res.fattr == NULL)
4627 args.bitmask = server->cache_consistency_bitmask;
4629 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4631 nfs_access_set_mask(entry, res.access);
4633 nfs_refresh_inode(inode, res.fattr);
4635 nfs_free_fattr(res.fattr);
4639 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry,
4640 const struct cred *cred)
4642 struct nfs4_exception exception = {
4643 .interruptible = true,
4647 err = _nfs4_proc_access(inode, entry, cred);
4648 trace_nfs4_access(inode, err);
4649 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4651 } while (exception.retry);
4656 * TODO: For the time being, we don't try to get any attributes
4657 * along with any of the zero-copy operations READ, READDIR,
4660 * In the case of the first three, we want to put the GETATTR
4661 * after the read-type operation -- this is because it is hard
4662 * to predict the length of a GETATTR response in v4, and thus
4663 * align the READ data correctly. This means that the GETATTR
4664 * may end up partially falling into the page cache, and we should
4665 * shift it into the 'tail' of the xdr_buf before processing.
4666 * To do this efficiently, we need to know the total length
4667 * of data received, which doesn't seem to be available outside
4670 * In the case of WRITE, we also want to put the GETATTR after
4671 * the operation -- in this case because we want to make sure
4672 * we get the post-operation mtime and size.
4674 * Both of these changes to the XDR layer would in fact be quite
4675 * minor, but I decided to leave them for a subsequent patch.
4677 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4678 unsigned int pgbase, unsigned int pglen)
4680 struct nfs4_readlink args = {
4681 .fh = NFS_FH(inode),
4686 struct nfs4_readlink_res res;
4687 struct rpc_message msg = {
4688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4693 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4696 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4697 unsigned int pgbase, unsigned int pglen)
4699 struct nfs4_exception exception = {
4700 .interruptible = true,
4704 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4705 trace_nfs4_readlink(inode, err);
4706 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4708 } while (exception.retry);
4713 * This is just for mknod. open(O_CREAT) will always do ->open_context().
4716 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4719 struct nfs_server *server = NFS_SERVER(dir);
4720 struct nfs4_label l, *ilabel;
4721 struct nfs_open_context *ctx;
4722 struct nfs4_state *state;
4725 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4727 return PTR_ERR(ctx);
4729 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4731 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4732 sattr->ia_mode &= ~current_umask();
4733 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4734 if (IS_ERR(state)) {
4735 status = PTR_ERR(state);
4739 nfs4_label_release_security(ilabel);
4740 put_nfs_open_context(ctx);
4745 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
4747 struct nfs_server *server = NFS_SERVER(dir);
4748 struct nfs_removeargs args = {
4752 struct nfs_removeres res = {
4755 struct rpc_message msg = {
4756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4760 unsigned long timestamp = jiffies;
4763 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4765 spin_lock(&dir->i_lock);
4766 /* Removing a directory decrements nlink in the parent */
4767 if (ftype == NF4DIR && dir->i_nlink > 2)
4768 nfs4_dec_nlink_locked(dir);
4769 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4770 NFS_INO_INVALID_DATA);
4771 spin_unlock(&dir->i_lock);
4776 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
4778 struct nfs4_exception exception = {
4779 .interruptible = true,
4781 struct inode *inode = d_inode(dentry);
4785 if (inode->i_nlink == 1)
4786 nfs4_inode_return_delegation(inode);
4788 nfs4_inode_make_writeable(inode);
4791 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
4792 trace_nfs4_remove(dir, &dentry->d_name, err);
4793 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4795 } while (exception.retry);
4799 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4801 struct nfs4_exception exception = {
4802 .interruptible = true,
4807 err = _nfs4_proc_remove(dir, name, NF4DIR);
4808 trace_nfs4_remove(dir, name, err);
4809 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4811 } while (exception.retry);
4815 static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4816 struct dentry *dentry,
4817 struct inode *inode)
4819 struct nfs_removeargs *args = msg->rpc_argp;
4820 struct nfs_removeres *res = msg->rpc_resp;
4822 res->server = NFS_SB(dentry->d_sb);
4823 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4824 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
4826 nfs_fattr_init(res->dir_attr);
4829 nfs4_inode_return_delegation(inode);
4830 nfs_d_prune_case_insensitive_aliases(inode);
4834 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4836 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4837 &data->args.seq_args,
4842 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4844 struct nfs_unlinkdata *data = task->tk_calldata;
4845 struct nfs_removeres *res = &data->res;
4847 if (!nfs4_sequence_done(task, &res->seq_res))
4849 if (nfs4_async_handle_error(task, res->server, NULL,
4850 &data->timeout) == -EAGAIN)
4852 if (task->tk_status == 0)
4853 nfs4_update_changeattr(dir, &res->cinfo,
4854 res->dir_attr->time_start,
4855 NFS_INO_INVALID_DATA);
4859 static void nfs4_proc_rename_setup(struct rpc_message *msg,
4860 struct dentry *old_dentry,
4861 struct dentry *new_dentry)
4863 struct nfs_renameargs *arg = msg->rpc_argp;
4864 struct nfs_renameres *res = msg->rpc_resp;
4865 struct inode *old_inode = d_inode(old_dentry);
4866 struct inode *new_inode = d_inode(new_dentry);
4869 nfs4_inode_make_writeable(old_inode);
4871 nfs4_inode_return_delegation(new_inode);
4872 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4873 res->server = NFS_SB(old_dentry->d_sb);
4874 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
4877 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4879 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4880 &data->args.seq_args,
4885 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4886 struct inode *new_dir)
4888 struct nfs_renamedata *data = task->tk_calldata;
4889 struct nfs_renameres *res = &data->res;
4891 if (!nfs4_sequence_done(task, &res->seq_res))
4893 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4896 if (task->tk_status == 0) {
4897 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry));
4898 if (new_dir != old_dir) {
4899 /* Note: If we moved a directory, nlink will change */
4900 nfs4_update_changeattr(old_dir, &res->old_cinfo,
4901 res->old_fattr->time_start,
4902 NFS_INO_INVALID_NLINK |
4903 NFS_INO_INVALID_DATA);
4904 nfs4_update_changeattr(new_dir, &res->new_cinfo,
4905 res->new_fattr->time_start,
4906 NFS_INO_INVALID_NLINK |
4907 NFS_INO_INVALID_DATA);
4909 nfs4_update_changeattr(old_dir, &res->old_cinfo,
4910 res->old_fattr->time_start,
4911 NFS_INO_INVALID_DATA);
4916 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4918 struct nfs_server *server = NFS_SERVER(inode);
4919 __u32 bitmask[NFS4_BITMASK_SZ];
4920 struct nfs4_link_arg arg = {
4921 .fh = NFS_FH(inode),
4922 .dir_fh = NFS_FH(dir),
4926 struct nfs4_link_res res = {
4929 struct rpc_message msg = {
4930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4934 int status = -ENOMEM;
4936 res.fattr = nfs_alloc_fattr_with_label(server);
4937 if (res.fattr == NULL)
4940 nfs4_inode_make_writeable(inode);
4941 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode,
4942 NFS_INO_INVALID_CHANGE);
4943 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4945 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4946 NFS_INO_INVALID_DATA);
4947 nfs4_inc_nlink(inode);
4948 status = nfs_post_op_update_inode(inode, res.fattr);
4950 nfs_setsecurity(inode, res.fattr);
4954 nfs_free_fattr(res.fattr);
4958 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4960 struct nfs4_exception exception = {
4961 .interruptible = true,
4965 err = nfs4_handle_exception(NFS_SERVER(inode),
4966 _nfs4_proc_link(inode, dir, name),
4968 } while (exception.retry);
4972 struct nfs4_createdata {
4973 struct rpc_message msg;
4974 struct nfs4_create_arg arg;
4975 struct nfs4_create_res res;
4977 struct nfs_fattr fattr;
4980 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4981 const struct qstr *name, struct iattr *sattr, u32 ftype)
4983 struct nfs4_createdata *data;
4985 data = kzalloc(sizeof(*data), GFP_KERNEL);
4987 struct nfs_server *server = NFS_SERVER(dir);
4989 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL);
4990 if (IS_ERR(data->fattr.label))
4993 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4994 data->msg.rpc_argp = &data->arg;
4995 data->msg.rpc_resp = &data->res;
4996 data->arg.dir_fh = NFS_FH(dir);
4997 data->arg.server = server;
4998 data->arg.name = name;
4999 data->arg.attrs = sattr;
5000 data->arg.ftype = ftype;
5001 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label);
5002 data->arg.umask = current_umask();
5003 data->res.server = server;
5004 data->res.fh = &data->fh;
5005 data->res.fattr = &data->fattr;
5006 nfs_fattr_init(data->res.fattr);
5014 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
5016 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
5017 &data->arg.seq_args, &data->res.seq_res, 1);
5019 spin_lock(&dir->i_lock);
5020 /* Creating a directory bumps nlink in the parent */
5021 if (data->arg.ftype == NF4DIR)
5022 nfs4_inc_nlink_locked(dir);
5023 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
5024 data->res.fattr->time_start,
5025 NFS_INO_INVALID_DATA);
5026 spin_unlock(&dir->i_lock);
5027 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
5032 static void nfs4_free_createdata(struct nfs4_createdata *data)
5034 nfs4_label_free(data->fattr.label);
5038 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
5039 struct folio *folio, unsigned int len, struct iattr *sattr,
5040 struct nfs4_label *label)
5042 struct page *page = &folio->page;
5043 struct nfs4_createdata *data;
5044 int status = -ENAMETOOLONG;
5046 if (len > NFS4_MAXPATHLEN)
5050 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
5054 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
5055 data->arg.u.symlink.pages = &page;
5056 data->arg.u.symlink.len = len;
5057 data->arg.label = label;
5059 status = nfs4_do_create(dir, dentry, data);
5061 nfs4_free_createdata(data);
5066 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
5067 struct folio *folio, unsigned int len, struct iattr *sattr)
5069 struct nfs4_exception exception = {
5070 .interruptible = true,
5072 struct nfs4_label l, *label;
5075 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5078 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label);
5079 trace_nfs4_symlink(dir, &dentry->d_name, err);
5080 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5082 } while (exception.retry);
5084 nfs4_label_release_security(label);
5088 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
5089 struct iattr *sattr, struct nfs4_label *label)
5091 struct nfs4_createdata *data;
5092 int status = -ENOMEM;
5094 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
5098 data->arg.label = label;
5099 status = nfs4_do_create(dir, dentry, data);
5101 nfs4_free_createdata(data);
5106 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
5107 struct iattr *sattr)
5109 struct nfs_server *server = NFS_SERVER(dir);
5110 struct nfs4_exception exception = {
5111 .interruptible = true,
5113 struct nfs4_label l, *label;
5116 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5118 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5119 sattr->ia_mode &= ~current_umask();
5121 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
5122 trace_nfs4_mkdir(dir, &dentry->d_name, err);
5123 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5125 } while (exception.retry);
5126 nfs4_label_release_security(label);
5131 static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg,
5132 struct nfs_readdir_res *nr_res)
5134 struct inode *dir = d_inode(nr_arg->dentry);
5135 struct nfs_server *server = NFS_SERVER(dir);
5136 struct nfs4_readdir_arg args = {
5138 .pages = nr_arg->pages,
5140 .count = nr_arg->page_len,
5141 .plus = nr_arg->plus,
5143 struct nfs4_readdir_res res;
5144 struct rpc_message msg = {
5145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
5148 .rpc_cred = nr_arg->cred,
5152 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__,
5153 nr_arg->dentry, (unsigned long long)nr_arg->cookie);
5154 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
5155 args.bitmask = server->attr_bitmask_nl;
5157 args.bitmask = server->attr_bitmask;
5159 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args);
5160 res.pgbase = args.pgbase;
5161 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5164 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE);
5165 status += args.pgbase;
5168 nfs_invalidate_atime(dir);
5170 dprintk("%s: returns %d\n", __func__, status);
5174 static int nfs4_proc_readdir(struct nfs_readdir_arg *arg,
5175 struct nfs_readdir_res *res)
5177 struct nfs4_exception exception = {
5178 .interruptible = true,
5182 err = _nfs4_proc_readdir(arg, res);
5183 trace_nfs4_readdir(d_inode(arg->dentry), err);
5184 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)),
5186 } while (exception.retry);
5190 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5191 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
5193 struct nfs4_createdata *data;
5194 int mode = sattr->ia_mode;
5195 int status = -ENOMEM;
5197 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5202 data->arg.ftype = NF4FIFO;
5203 else if (S_ISBLK(mode)) {
5204 data->arg.ftype = NF4BLK;
5205 data->arg.u.device.specdata1 = MAJOR(rdev);
5206 data->arg.u.device.specdata2 = MINOR(rdev);
5208 else if (S_ISCHR(mode)) {
5209 data->arg.ftype = NF4CHR;
5210 data->arg.u.device.specdata1 = MAJOR(rdev);
5211 data->arg.u.device.specdata2 = MINOR(rdev);
5212 } else if (!S_ISSOCK(mode)) {
5217 data->arg.label = label;
5218 status = nfs4_do_create(dir, dentry, data);
5220 nfs4_free_createdata(data);
5225 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5226 struct iattr *sattr, dev_t rdev)
5228 struct nfs_server *server = NFS_SERVER(dir);
5229 struct nfs4_exception exception = {
5230 .interruptible = true,
5232 struct nfs4_label l, *label;
5235 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5237 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5238 sattr->ia_mode &= ~current_umask();
5240 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5241 trace_nfs4_mknod(dir, &dentry->d_name, err);
5242 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5244 } while (exception.retry);
5246 nfs4_label_release_security(label);
5251 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5252 struct nfs_fsstat *fsstat)
5254 struct nfs4_statfs_arg args = {
5256 .bitmask = server->attr_bitmask,
5258 struct nfs4_statfs_res res = {
5261 struct rpc_message msg = {
5262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5267 nfs_fattr_init(fsstat->fattr);
5268 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5271 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5273 struct nfs4_exception exception = {
5274 .interruptible = true,
5278 err = nfs4_handle_exception(server,
5279 _nfs4_proc_statfs(server, fhandle, fsstat),
5281 } while (exception.retry);
5285 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5286 struct nfs_fsinfo *fsinfo)
5288 struct nfs4_fsinfo_arg args = {
5290 .bitmask = server->attr_bitmask,
5292 struct nfs4_fsinfo_res res = {
5295 struct rpc_message msg = {
5296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5301 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5304 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5306 struct nfs4_exception exception = {
5307 .interruptible = true,
5312 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
5313 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
5315 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
5318 err = nfs4_handle_exception(server, err, &exception);
5319 } while (exception.retry);
5323 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5327 nfs_fattr_init(fsinfo->fattr);
5328 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
5330 /* block layout checks this! */
5331 server->pnfs_blksize = fsinfo->blksize;
5332 set_pnfs_layoutdriver(server, fhandle, fsinfo);
5338 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5339 struct nfs_pathconf *pathconf)
5341 struct nfs4_pathconf_arg args = {
5343 .bitmask = server->attr_bitmask,
5345 struct nfs4_pathconf_res res = {
5346 .pathconf = pathconf,
5348 struct rpc_message msg = {
5349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5354 /* None of the pathconf attributes are mandatory to implement */
5355 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5356 memset(pathconf, 0, sizeof(*pathconf));
5360 nfs_fattr_init(pathconf->fattr);
5361 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5364 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5365 struct nfs_pathconf *pathconf)
5367 struct nfs4_exception exception = {
5368 .interruptible = true,
5373 err = nfs4_handle_exception(server,
5374 _nfs4_proc_pathconf(server, fhandle, pathconf),
5376 } while (exception.retry);
5380 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
5381 const struct nfs_open_context *ctx,
5382 const struct nfs_lock_context *l_ctx,
5385 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
5387 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5389 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5390 const struct nfs_open_context *ctx,
5391 const struct nfs_lock_context *l_ctx,
5394 nfs4_stateid _current_stateid;
5396 /* If the current stateid represents a lost lock, then exit */
5397 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
5399 return nfs4_stateid_match(stateid, &_current_stateid);
5402 static bool nfs4_error_stateid_expired(int err)
5405 case -NFS4ERR_DELEG_REVOKED:
5406 case -NFS4ERR_ADMIN_REVOKED:
5407 case -NFS4ERR_BAD_STATEID:
5408 case -NFS4ERR_STALE_STATEID:
5409 case -NFS4ERR_OLD_STATEID:
5410 case -NFS4ERR_OPENMODE:
5411 case -NFS4ERR_EXPIRED:
5417 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
5419 struct nfs_server *server = NFS_SERVER(hdr->inode);
5421 trace_nfs4_read(hdr, task->tk_status);
5422 if (task->tk_status < 0) {
5423 struct nfs4_exception exception = {
5424 .inode = hdr->inode,
5425 .state = hdr->args.context->state,
5426 .stateid = &hdr->args.stateid,
5428 task->tk_status = nfs4_async_handle_exception(task,
5429 server, task->tk_status, &exception);
5430 if (exception.retry) {
5431 rpc_restart_call_prepare(task);
5436 if (task->tk_status > 0)
5437 renew_lease(server, hdr->timestamp);
5441 static bool nfs4_read_stateid_changed(struct rpc_task *task,
5442 struct nfs_pgio_args *args)
5445 if (!nfs4_error_stateid_expired(task->tk_status) ||
5446 nfs4_stateid_is_current(&args->stateid,
5451 rpc_restart_call_prepare(task);
5455 static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5456 struct nfs_pgio_header *hdr)
5458 struct nfs_server *server = NFS_SERVER(hdr->inode);
5459 struct rpc_message *msg = &task->tk_msg;
5461 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
5462 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
5463 server->caps &= ~NFS_CAP_READ_PLUS;
5464 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5465 rpc_restart_call_prepare(task);
5471 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5473 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5475 if (nfs4_read_stateid_changed(task, &hdr->args))
5477 if (nfs4_read_plus_not_supported(task, hdr))
5479 if (task->tk_status > 0)
5480 nfs_invalidate_atime(hdr->inode);
5481 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5482 nfs4_read_done_cb(task, hdr);
5485 #if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
5486 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5487 struct rpc_message *msg)
5489 /* Note: We don't use READ_PLUS with pNFS yet */
5490 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) {
5491 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
5492 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE);
5497 static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5498 struct rpc_message *msg)
5502 #endif /* CONFIG_NFS_V4_2 */
5504 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5505 struct rpc_message *msg)
5507 hdr->timestamp = jiffies;
5508 if (!hdr->pgio_done_cb)
5509 hdr->pgio_done_cb = nfs4_read_done_cb;
5510 if (!nfs42_read_plus_support(hdr, msg))
5511 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5512 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5515 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5516 struct nfs_pgio_header *hdr)
5518 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
5519 &hdr->args.seq_args,
5523 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5524 hdr->args.lock_context,
5525 hdr->rw_mode) == -EIO)
5527 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
5532 static int nfs4_write_done_cb(struct rpc_task *task,
5533 struct nfs_pgio_header *hdr)
5535 struct inode *inode = hdr->inode;
5537 trace_nfs4_write(hdr, task->tk_status);
5538 if (task->tk_status < 0) {
5539 struct nfs4_exception exception = {
5540 .inode = hdr->inode,
5541 .state = hdr->args.context->state,
5542 .stateid = &hdr->args.stateid,
5544 task->tk_status = nfs4_async_handle_exception(task,
5545 NFS_SERVER(inode), task->tk_status,
5547 if (exception.retry) {
5548 rpc_restart_call_prepare(task);
5552 if (task->tk_status >= 0) {
5553 renew_lease(NFS_SERVER(inode), hdr->timestamp);
5554 nfs_writeback_update_inode(hdr);
5559 static bool nfs4_write_stateid_changed(struct rpc_task *task,
5560 struct nfs_pgio_args *args)
5563 if (!nfs4_error_stateid_expired(task->tk_status) ||
5564 nfs4_stateid_is_current(&args->stateid,
5569 rpc_restart_call_prepare(task);
5573 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5575 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5577 if (nfs4_write_stateid_changed(task, &hdr->args))
5579 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5580 nfs4_write_done_cb(task, hdr);
5584 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
5586 /* Don't request attributes for pNFS or O_DIRECT writes */
5587 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5589 /* Otherwise, request attributes if and only if we don't hold
5592 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
5595 void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[],
5596 struct inode *inode, unsigned long cache_validity)
5598 struct nfs_server *server = NFS_SERVER(inode);
5601 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ);
5602 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity);
5604 if (cache_validity & NFS_INO_INVALID_CHANGE)
5605 bitmask[0] |= FATTR4_WORD0_CHANGE;
5606 if (cache_validity & NFS_INO_INVALID_ATIME)
5607 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
5608 if (cache_validity & NFS_INO_INVALID_MODE)
5609 bitmask[1] |= FATTR4_WORD1_MODE;
5610 if (cache_validity & NFS_INO_INVALID_OTHER)
5611 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP;
5612 if (cache_validity & NFS_INO_INVALID_NLINK)
5613 bitmask[1] |= FATTR4_WORD1_NUMLINKS;
5614 if (cache_validity & NFS_INO_INVALID_CTIME)
5615 bitmask[1] |= FATTR4_WORD1_TIME_METADATA;
5616 if (cache_validity & NFS_INO_INVALID_MTIME)
5617 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
5618 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5619 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
5621 if (cache_validity & NFS_INO_INVALID_SIZE)
5622 bitmask[0] |= FATTR4_WORD0_SIZE;
5624 for (i = 0; i < NFS4_BITMASK_SZ; i++)
5625 bitmask[i] &= server->attr_bitmask[i];
5628 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
5629 struct rpc_message *msg,
5630 struct rpc_clnt **clnt)
5632 struct nfs_server *server = NFS_SERVER(hdr->inode);
5634 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5635 hdr->args.bitmask = NULL;
5636 hdr->res.fattr = NULL;
5638 nfs4_bitmask_set(hdr->args.bitmask_store,
5639 server->cache_consistency_bitmask,
5640 hdr->inode, NFS_INO_INVALID_BLOCKS);
5641 hdr->args.bitmask = hdr->args.bitmask_store;
5644 if (!hdr->pgio_done_cb)
5645 hdr->pgio_done_cb = nfs4_write_done_cb;
5646 hdr->res.server = server;
5647 hdr->timestamp = jiffies;
5649 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
5650 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5651 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr);
5654 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
5656 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
5657 &data->args.seq_args,
5662 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
5664 struct inode *inode = data->inode;
5666 trace_nfs4_commit(data, task->tk_status);
5667 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5668 NULL, NULL) == -EAGAIN) {
5669 rpc_restart_call_prepare(task);
5675 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5677 if (!nfs4_sequence_done(task, &data->res.seq_res))
5679 return data->commit_done_cb(task, data);
5682 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5683 struct rpc_clnt **clnt)
5685 struct nfs_server *server = NFS_SERVER(data->inode);
5687 if (data->commit_done_cb == NULL)
5688 data->commit_done_cb = nfs4_commit_done_cb;
5689 data->res.server = server;
5690 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
5691 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5692 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client,
5693 NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
5696 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5697 struct nfs_commitres *res)
5699 struct inode *dst_inode = file_inode(dst);
5700 struct nfs_server *server = NFS_SERVER(dst_inode);
5701 struct rpc_message msg = {
5702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5707 args->fh = NFS_FH(dst_inode);
5708 return nfs4_call_sync(server->client, server, &msg,
5709 &args->seq_args, &res->seq_res, 1);
5712 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5714 struct nfs_commitargs args = {
5718 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5719 struct nfs4_exception exception = { };
5723 status = _nfs4_proc_commit(dst, &args, res);
5724 status = nfs4_handle_exception(dst_server, status, &exception);
5725 } while (exception.retry);
5730 struct nfs4_renewdata {
5731 struct nfs_client *client;
5732 unsigned long timestamp;
5736 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5737 * standalone procedure for queueing an asynchronous RENEW.
5739 static void nfs4_renew_release(void *calldata)
5741 struct nfs4_renewdata *data = calldata;
5742 struct nfs_client *clp = data->client;
5744 if (refcount_read(&clp->cl_count) > 1)
5745 nfs4_schedule_state_renewal(clp);
5746 nfs_put_client(clp);
5750 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
5752 struct nfs4_renewdata *data = calldata;
5753 struct nfs_client *clp = data->client;
5754 unsigned long timestamp = data->timestamp;
5756 trace_nfs4_renew_async(clp, task->tk_status);
5757 switch (task->tk_status) {
5760 case -NFS4ERR_LEASE_MOVED:
5761 nfs4_schedule_lease_moved_recovery(clp);
5764 /* Unless we're shutting down, schedule state recovery! */
5765 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5767 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5768 nfs4_schedule_lease_recovery(clp);
5771 nfs4_schedule_path_down_recovery(clp);
5773 do_renew_lease(clp, timestamp);
5776 static const struct rpc_call_ops nfs4_renew_ops = {
5777 .rpc_call_done = nfs4_renew_done,
5778 .rpc_release = nfs4_renew_release,
5781 static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
5783 struct rpc_message msg = {
5784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5788 struct nfs4_renewdata *data;
5790 if (renew_flags == 0)
5792 if (!refcount_inc_not_zero(&clp->cl_count))
5794 data = kmalloc(sizeof(*data), GFP_NOFS);
5796 nfs_put_client(clp);
5800 data->timestamp = jiffies;
5801 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5802 &nfs4_renew_ops, data);
5805 static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
5807 struct rpc_message msg = {
5808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5812 unsigned long now = jiffies;
5815 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5818 do_renew_lease(clp, now);
5822 static bool nfs4_server_supports_acls(const struct nfs_server *server,
5823 enum nfs4_acl_type type)
5827 return server->attr_bitmask[0] & FATTR4_WORD0_ACL;
5829 return server->attr_bitmask[1] & FATTR4_WORD1_DACL;
5831 return server->attr_bitmask[1] & FATTR4_WORD1_SACL;
5835 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5836 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
5839 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5841 int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
5842 struct page **pages)
5844 struct page *newpage, **spages;
5850 len = min_t(size_t, PAGE_SIZE, buflen);
5851 newpage = alloc_page(GFP_KERNEL);
5853 if (newpage == NULL)
5855 memcpy(page_address(newpage), buf, len);
5860 } while (buflen != 0);
5866 __free_page(spages[rc-1]);
5870 struct nfs4_cached_acl {
5871 enum nfs4_acl_type type;
5877 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5879 struct nfs_inode *nfsi = NFS_I(inode);
5881 spin_lock(&inode->i_lock);
5882 kfree(nfsi->nfs4_acl);
5883 nfsi->nfs4_acl = acl;
5884 spin_unlock(&inode->i_lock);
5887 static void nfs4_zap_acl_attr(struct inode *inode)
5889 nfs4_set_cached_acl(inode, NULL);
5892 static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf,
5893 size_t buflen, enum nfs4_acl_type type)
5895 struct nfs_inode *nfsi = NFS_I(inode);
5896 struct nfs4_cached_acl *acl;
5899 spin_lock(&inode->i_lock);
5900 acl = nfsi->nfs4_acl;
5903 if (acl->type != type)
5905 if (buf == NULL) /* user is just asking for length */
5907 if (acl->cached == 0)
5909 ret = -ERANGE; /* see getxattr(2) man page */
5910 if (acl->len > buflen)
5912 memcpy(buf, acl->data, acl->len);
5916 spin_unlock(&inode->i_lock);
5920 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages,
5921 size_t pgbase, size_t acl_len,
5922 enum nfs4_acl_type type)
5924 struct nfs4_cached_acl *acl;
5925 size_t buflen = sizeof(*acl) + acl_len;
5927 if (buflen <= PAGE_SIZE) {
5928 acl = kmalloc(buflen, GFP_KERNEL);
5932 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5934 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5942 nfs4_set_cached_acl(inode, acl);
5946 * The getxattr API returns the required buffer length when called with a
5947 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5948 * the required buf. On a NULL buf, we send a page of data to the server
5949 * guessing that the ACL request can be serviced by a page. If so, we cache
5950 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5951 * the cache. If not so, we throw away the page, and cache the required
5952 * length. The next getxattr call will then produce another round trip to
5953 * the server, this time with the input buf of the required size.
5955 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf,
5956 size_t buflen, enum nfs4_acl_type type)
5958 struct page **pages;
5959 struct nfs_getaclargs args = {
5960 .fh = NFS_FH(inode),
5964 struct nfs_getaclres res = {
5968 struct rpc_message msg = {
5969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5973 unsigned int npages;
5974 int ret = -ENOMEM, i;
5975 struct nfs_server *server = NFS_SERVER(inode);
5978 buflen = server->rsize;
5980 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5981 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
5985 args.acl_pages = pages;
5987 for (i = 0; i < npages; i++) {
5988 pages[i] = alloc_page(GFP_KERNEL);
5993 /* for decoding across pages */
5994 res.acl_scratch = alloc_page(GFP_KERNEL);
5995 if (!res.acl_scratch)
5998 args.acl_len = npages * PAGE_SIZE;
6000 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
6001 __func__, buf, buflen, npages, args.acl_len);
6002 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
6003 &msg, &args.seq_args, &res.seq_res, 0);
6007 /* Handle the case where the passed-in buffer is too short */
6008 if (res.acl_flags & NFS4_ACL_TRUNC) {
6009 /* Did the user only issue a request for the acl length? */
6015 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len,
6018 if (res.acl_len > buflen) {
6022 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
6028 __free_page(pages[i]);
6029 if (res.acl_scratch)
6030 __free_page(res.acl_scratch);
6035 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf,
6036 size_t buflen, enum nfs4_acl_type type)
6038 struct nfs4_exception exception = {
6039 .interruptible = true,
6043 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type);
6044 trace_nfs4_get_acl(inode, ret);
6047 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
6048 } while (exception.retry);
6052 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen,
6053 enum nfs4_acl_type type)
6055 struct nfs_server *server = NFS_SERVER(inode);
6058 if (!nfs4_server_supports_acls(server, type))
6060 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
6063 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
6064 nfs_zap_acl_cache(inode);
6065 ret = nfs4_read_cached_acl(inode, buf, buflen, type);
6067 /* -ENOENT is returned if there is no ACL or if there is an ACL
6068 * but no cached acl data, just the acl length */
6070 return nfs4_get_acl_uncached(inode, buf, buflen, type);
6073 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf,
6074 size_t buflen, enum nfs4_acl_type type)
6076 struct nfs_server *server = NFS_SERVER(inode);
6077 struct page *pages[NFS4ACL_MAXPAGES];
6078 struct nfs_setaclargs arg = {
6079 .fh = NFS_FH(inode),
6084 struct nfs_setaclres res;
6085 struct rpc_message msg = {
6086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
6090 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
6093 /* You can't remove system.nfs4_acl: */
6096 if (!nfs4_server_supports_acls(server, type))
6098 if (npages > ARRAY_SIZE(pages))
6100 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
6103 nfs4_inode_make_writeable(inode);
6104 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6107 * Free each page after tx, so the only ref left is
6108 * held by the network stack
6111 put_page(pages[i-1]);
6114 * Acl update can result in inode attribute update.
6115 * so mark the attribute cache invalid.
6117 spin_lock(&inode->i_lock);
6118 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
6119 NFS_INO_INVALID_CTIME |
6120 NFS_INO_REVAL_FORCED);
6121 spin_unlock(&inode->i_lock);
6122 nfs_access_zap_cache(inode);
6123 nfs_zap_acl_cache(inode);
6127 static int nfs4_proc_set_acl(struct inode *inode, const void *buf,
6128 size_t buflen, enum nfs4_acl_type type)
6130 struct nfs4_exception exception = { };
6133 err = __nfs4_proc_set_acl(inode, buf, buflen, type);
6134 trace_nfs4_set_acl(inode, err);
6135 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) {
6137 * no need to retry since the kernel
6138 * isn't involved in encoding the ACEs.
6143 err = nfs4_handle_exception(NFS_SERVER(inode), err,
6145 } while (exception.retry);
6149 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6150 static int _nfs4_get_security_label(struct inode *inode, void *buf,
6153 struct nfs_server *server = NFS_SERVER(inode);
6154 struct nfs4_label label = {0, 0, buflen, buf};
6156 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
6157 struct nfs_fattr fattr = {
6160 struct nfs4_getattr_arg arg = {
6161 .fh = NFS_FH(inode),
6164 struct nfs4_getattr_res res = {
6168 struct rpc_message msg = {
6169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
6175 nfs_fattr_init(&fattr);
6177 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
6180 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
6185 static int nfs4_get_security_label(struct inode *inode, void *buf,
6188 struct nfs4_exception exception = {
6189 .interruptible = true,
6193 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6197 err = _nfs4_get_security_label(inode, buf, buflen);
6198 trace_nfs4_get_security_label(inode, err);
6199 err = nfs4_handle_exception(NFS_SERVER(inode), err,
6201 } while (exception.retry);
6205 static int _nfs4_do_set_security_label(struct inode *inode,
6206 struct nfs4_label *ilabel,
6207 struct nfs_fattr *fattr)
6210 struct iattr sattr = {0};
6211 struct nfs_server *server = NFS_SERVER(inode);
6212 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
6213 struct nfs_setattrargs arg = {
6214 .fh = NFS_FH(inode),
6220 struct nfs_setattrres res = {
6224 struct rpc_message msg = {
6225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6231 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
6233 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6235 dprintk("%s failed: %d\n", __func__, status);
6240 static int nfs4_do_set_security_label(struct inode *inode,
6241 struct nfs4_label *ilabel,
6242 struct nfs_fattr *fattr)
6244 struct nfs4_exception exception = { };
6248 err = _nfs4_do_set_security_label(inode, ilabel, fattr);
6249 trace_nfs4_set_security_label(inode, err);
6250 err = nfs4_handle_exception(NFS_SERVER(inode), err,
6252 } while (exception.retry);
6257 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
6259 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf };
6260 struct nfs_fattr *fattr;
6263 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6266 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
6270 status = nfs4_do_set_security_label(inode, &ilabel, fattr);
6272 nfs_setsecurity(inode, fattr);
6276 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
6279 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6280 nfs4_verifier *bootverf)
6284 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6285 /* An impossible timestamp guarantees this value
6286 * will never match a generated boot time. */
6287 verf[0] = cpu_to_be32(U32_MAX);
6288 verf[1] = cpu_to_be32(U32_MAX);
6290 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6291 u64 ns = ktime_to_ns(nn->boot_time);
6293 verf[0] = cpu_to_be32(ns >> 32);
6294 verf[1] = cpu_to_be32(ns);
6296 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6300 nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
6302 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6303 struct nfs_netns_client *nn_clp = nn->nfs_client;
6310 id = rcu_dereference(nn_clp->identifier);
6312 strscpy(buf, id, buflen);
6316 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
6317 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6323 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
6325 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6330 if (clp->cl_owner_id != NULL)
6335 strlen(clp->cl_rpcclient->cl_nodename) +
6337 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
6341 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
6345 if (len > NFS4_OPAQUE_LIMIT + 1)
6349 * Since this string is allocated at mount time, and held until the
6350 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6351 * about a memory-reclaim deadlock.
6353 str = kmalloc(len, GFP_KERNEL);
6359 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
6360 clp->cl_rpcclient->cl_nodename, buf,
6361 rpc_peeraddr2str(clp->cl_rpcclient,
6364 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
6365 clp->cl_rpcclient->cl_nodename,
6366 rpc_peeraddr2str(clp->cl_rpcclient,
6370 clp->cl_owner_id = str;
6375 nfs4_init_uniform_client_string(struct nfs_client *clp)
6377 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6382 if (clp->cl_owner_id != NULL)
6385 len = 10 + 10 + 1 + 10 + 1 +
6386 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6388 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
6392 if (len > NFS4_OPAQUE_LIMIT + 1)
6396 * Since this string is allocated at mount time, and held until the
6397 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6398 * about a memory-reclaim deadlock.
6400 str = kmalloc(len, GFP_KERNEL);
6405 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6406 clp->rpc_ops->version, clp->cl_minorversion,
6407 buf, clp->cl_rpcclient->cl_nodename);
6409 scnprintf(str, len, "Linux NFSv%u.%u %s",
6410 clp->rpc_ops->version, clp->cl_minorversion,
6411 clp->cl_rpcclient->cl_nodename);
6412 clp->cl_owner_id = str;
6417 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6418 * services. Advertise one based on the address family of the
6422 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6424 if (strchr(clp->cl_ipaddr, ':') != NULL)
6425 return scnprintf(buf, len, "tcp6");
6427 return scnprintf(buf, len, "tcp");
6430 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6432 struct nfs4_setclientid *sc = calldata;
6434 if (task->tk_status == 0)
6435 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6438 static const struct rpc_call_ops nfs4_setclientid_ops = {
6439 .rpc_call_done = nfs4_setclientid_done,
6443 * nfs4_proc_setclientid - Negotiate client ID
6444 * @clp: state data structure
6445 * @program: RPC program for NFSv4 callback service
6446 * @port: IP port number for NFS4 callback service
6447 * @cred: credential to use for this call
6448 * @res: where to place the result
6450 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6452 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
6453 unsigned short port, const struct cred *cred,
6454 struct nfs4_setclientid_res *res)
6456 nfs4_verifier sc_verifier;
6457 struct nfs4_setclientid setclientid = {
6458 .sc_verifier = &sc_verifier,
6462 struct rpc_message msg = {
6463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6464 .rpc_argp = &setclientid,
6468 struct rpc_task_setup task_setup_data = {
6469 .rpc_client = clp->cl_rpcclient,
6470 .rpc_message = &msg,
6471 .callback_ops = &nfs4_setclientid_ops,
6472 .callback_data = &setclientid,
6473 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
6475 unsigned long now = jiffies;
6478 /* nfs_client_id4 */
6479 nfs4_init_boot_verifier(clp, &sc_verifier);
6481 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6482 status = nfs4_init_uniform_client_string(clp);
6484 status = nfs4_init_nonuniform_client_string(clp);
6490 setclientid.sc_netid_len =
6491 nfs4_init_callback_netid(clp,
6492 setclientid.sc_netid,
6493 sizeof(setclientid.sc_netid));
6494 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
6495 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
6496 clp->cl_ipaddr, port >> 8, port & 255);
6498 dprintk("NFS call setclientid auth=%s, '%s'\n",
6499 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6502 status = nfs4_call_sync_custom(&task_setup_data);
6503 if (setclientid.sc_cred) {
6504 kfree(clp->cl_acceptor);
6505 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6506 put_rpccred(setclientid.sc_cred);
6510 do_renew_lease(clp, now);
6512 trace_nfs4_setclientid(clp, status);
6513 dprintk("NFS reply setclientid: %d\n", status);
6518 * nfs4_proc_setclientid_confirm - Confirm client ID
6519 * @clp: state data structure
6520 * @arg: result of a previous SETCLIENTID
6521 * @cred: credential to use for this call
6523 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6525 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
6526 struct nfs4_setclientid_res *arg,
6527 const struct cred *cred)
6529 struct rpc_message msg = {
6530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
6536 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6537 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6539 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6540 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
6541 trace_nfs4_setclientid_confirm(clp, status);
6542 dprintk("NFS reply setclientid_confirm: %d\n", status);
6546 struct nfs4_delegreturndata {
6547 struct nfs4_delegreturnargs args;
6548 struct nfs4_delegreturnres res;
6550 nfs4_stateid stateid;
6551 unsigned long timestamp;
6553 struct nfs4_layoutreturn_args arg;
6554 struct nfs4_layoutreturn_res res;
6555 struct nfs4_xdr_opaque_data ld_private;
6559 struct nfs_fattr fattr;
6561 struct inode *inode;
6564 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6566 struct nfs4_delegreturndata *data = calldata;
6567 struct nfs4_exception exception = {
6568 .inode = data->inode,
6569 .stateid = &data->stateid,
6570 .task_is_privileged = data->args.seq_args.sa_privileged,
6573 if (!nfs4_sequence_done(task, &data->res.seq_res))
6576 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
6578 /* Handle Layoutreturn errors */
6579 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res,
6580 &data->res.lr_ret) == -EAGAIN)
6583 switch (task->tk_status) {
6585 renew_lease(data->res.server, data->timestamp);
6587 case -NFS4ERR_ADMIN_REVOKED:
6588 case -NFS4ERR_DELEG_REVOKED:
6589 case -NFS4ERR_EXPIRED:
6590 nfs4_free_revoked_stateid(data->res.server,
6592 task->tk_msg.rpc_cred);
6594 case -NFS4ERR_BAD_STATEID:
6595 case -NFS4ERR_STALE_STATEID:
6597 task->tk_status = 0;
6599 case -NFS4ERR_OLD_STATEID:
6600 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6601 nfs4_stateid_seqid_inc(&data->stateid);
6602 if (data->args.bitmask) {
6603 data->args.bitmask = NULL;
6604 data->res.fattr = NULL;
6607 case -NFS4ERR_ACCESS:
6608 if (data->args.bitmask) {
6609 data->args.bitmask = NULL;
6610 data->res.fattr = NULL;
6615 task->tk_status = nfs4_async_handle_exception(task,
6616 data->res.server, task->tk_status,
6618 if (exception.retry)
6621 nfs_delegation_mark_returned(data->inode, data->args.stateid);
6622 data->rpc_status = task->tk_status;
6625 task->tk_status = 0;
6626 rpc_restart_call_prepare(task);
6629 static void nfs4_delegreturn_release(void *calldata)
6631 struct nfs4_delegreturndata *data = calldata;
6632 struct inode *inode = data->inode;
6635 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6638 nfs4_fattr_set_prechange(&data->fattr,
6639 inode_peek_iversion_raw(inode));
6640 nfs_refresh_inode(inode, &data->fattr);
6641 nfs_iput_and_deactive(inode);
6646 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6648 struct nfs4_delegreturndata *d_data;
6649 struct pnfs_layout_hdr *lo;
6653 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6654 nfs4_sequence_done(task, &d_data->res.seq_res);
6658 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6659 if (lo && !pnfs_layout_is_valid(lo)) {
6660 d_data->args.lr_args = NULL;
6661 d_data->res.lr_res = NULL;
6664 nfs4_setup_sequence(d_data->res.server->nfs_client,
6665 &d_data->args.seq_args,
6666 &d_data->res.seq_res,
6670 static const struct rpc_call_ops nfs4_delegreturn_ops = {
6671 .rpc_call_prepare = nfs4_delegreturn_prepare,
6672 .rpc_call_done = nfs4_delegreturn_done,
6673 .rpc_release = nfs4_delegreturn_release,
6676 static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6678 struct nfs4_delegreturndata *data;
6679 struct nfs_server *server = NFS_SERVER(inode);
6680 struct rpc_task *task;
6681 struct rpc_message msg = {
6682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6685 struct rpc_task_setup task_setup_data = {
6686 .rpc_client = server->client,
6687 .rpc_message = &msg,
6688 .callback_ops = &nfs4_delegreturn_ops,
6689 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
6693 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE))
6694 task_setup_data.flags |= RPC_TASK_MOVEABLE;
6696 data = kzalloc(sizeof(*data), GFP_KERNEL);
6700 nfs4_state_protect(server->nfs_client,
6701 NFS_SP4_MACH_CRED_CLEANUP,
6702 &task_setup_data.rpc_client, &msg);
6704 data->args.fhandle = &data->fh;
6705 data->args.stateid = &data->stateid;
6706 nfs4_bitmask_set(data->args.bitmask_store,
6707 server->cache_consistency_bitmask, inode, 0);
6708 data->args.bitmask = data->args.bitmask_store;
6709 nfs_copy_fh(&data->fh, NFS_FH(inode));
6710 nfs4_stateid_copy(&data->stateid, stateid);
6711 data->res.fattr = &data->fattr;
6712 data->res.server = server;
6713 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6714 data->lr.arg.ld_private = &data->lr.ld_private;
6715 nfs_fattr_init(data->res.fattr);
6716 data->timestamp = jiffies;
6717 data->rpc_status = 0;
6718 data->inode = nfs_igrab_and_active(inode);
6719 if (data->inode || issync) {
6720 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res,
6723 data->args.lr_args = &data->lr.arg;
6724 data->res.lr_res = &data->lr.res;
6729 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6732 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6734 task_setup_data.callback_data = data;
6735 msg.rpc_argp = &data->args;
6736 msg.rpc_resp = &data->res;
6737 task = rpc_run_task(&task_setup_data);
6739 return PTR_ERR(task);
6742 status = rpc_wait_for_completion_task(task);
6745 status = data->rpc_status;
6751 int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
6753 struct nfs_server *server = NFS_SERVER(inode);
6754 struct nfs4_exception exception = { };
6757 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
6758 trace_nfs4_delegreturn(inode, stateid, err);
6760 case -NFS4ERR_STALE_STATEID:
6761 case -NFS4ERR_EXPIRED:
6765 err = nfs4_handle_exception(server, err, &exception);
6766 } while (exception.retry);
6770 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6772 struct inode *inode = state->inode;
6773 struct nfs_server *server = NFS_SERVER(inode);
6774 struct nfs_client *clp = server->nfs_client;
6775 struct nfs_lockt_args arg = {
6776 .fh = NFS_FH(inode),
6779 struct nfs_lockt_res res = {
6782 struct rpc_message msg = {
6783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
6786 .rpc_cred = state->owner->so_cred,
6788 struct nfs4_lock_state *lsp;
6791 arg.lock_owner.clientid = clp->cl_clientid;
6792 status = nfs4_set_lock_state(state, request);
6795 lsp = request->fl_u.nfs4_fl.owner;
6796 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6797 arg.lock_owner.s_dev = server->s_dev;
6798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6801 request->fl_type = F_UNLCK;
6803 case -NFS4ERR_DENIED:
6806 request->fl_ops->fl_release_private(request);
6807 request->fl_ops = NULL;
6812 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6814 struct nfs4_exception exception = {
6815 .interruptible = true,
6820 err = _nfs4_proc_getlk(state, cmd, request);
6821 trace_nfs4_get_lock(request, state, cmd, err);
6822 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6824 } while (exception.retry);
6829 * Update the seqid of a lock stateid after receiving
6830 * NFS4ERR_OLD_STATEID
6832 static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6833 struct nfs4_lock_state *lsp)
6835 struct nfs4_state *state = lsp->ls_state;
6838 spin_lock(&state->state_lock);
6839 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6841 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6842 nfs4_stateid_seqid_inc(dst);
6844 dst->seqid = lsp->ls_stateid.seqid;
6847 spin_unlock(&state->state_lock);
6851 static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6852 struct nfs4_lock_state *lsp)
6854 struct nfs4_state *state = lsp->ls_state;
6857 spin_lock(&state->state_lock);
6858 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6859 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6860 spin_unlock(&state->state_lock);
6864 struct nfs4_unlockdata {
6865 struct nfs_locku_args arg;
6866 struct nfs_locku_res res;
6867 struct nfs4_lock_state *lsp;
6868 struct nfs_open_context *ctx;
6869 struct nfs_lock_context *l_ctx;
6870 struct file_lock fl;
6871 struct nfs_server *server;
6872 unsigned long timestamp;
6875 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6876 struct nfs_open_context *ctx,
6877 struct nfs4_lock_state *lsp,
6878 struct nfs_seqid *seqid)
6880 struct nfs4_unlockdata *p;
6881 struct nfs4_state *state = lsp->ls_state;
6882 struct inode *inode = state->inode;
6884 p = kzalloc(sizeof(*p), GFP_KERNEL);
6887 p->arg.fh = NFS_FH(inode);
6889 p->arg.seqid = seqid;
6890 p->res.seqid = seqid;
6892 /* Ensure we don't close file until we're done freeing locks! */
6893 p->ctx = get_nfs_open_context(ctx);
6894 p->l_ctx = nfs_get_lock_context(ctx);
6895 locks_init_lock(&p->fl);
6896 locks_copy_lock(&p->fl, fl);
6897 p->server = NFS_SERVER(inode);
6898 spin_lock(&state->state_lock);
6899 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6900 spin_unlock(&state->state_lock);
6904 static void nfs4_locku_release_calldata(void *data)
6906 struct nfs4_unlockdata *calldata = data;
6907 nfs_free_seqid(calldata->arg.seqid);
6908 nfs4_put_lock_state(calldata->lsp);
6909 nfs_put_lock_context(calldata->l_ctx);
6910 put_nfs_open_context(calldata->ctx);
6914 static void nfs4_locku_done(struct rpc_task *task, void *data)
6916 struct nfs4_unlockdata *calldata = data;
6917 struct nfs4_exception exception = {
6918 .inode = calldata->lsp->ls_state->inode,
6919 .stateid = &calldata->arg.stateid,
6922 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6924 switch (task->tk_status) {
6926 renew_lease(calldata->server, calldata->timestamp);
6927 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6928 if (nfs4_update_lock_stateid(calldata->lsp,
6929 &calldata->res.stateid))
6932 case -NFS4ERR_ADMIN_REVOKED:
6933 case -NFS4ERR_EXPIRED:
6934 nfs4_free_revoked_stateid(calldata->server,
6935 &calldata->arg.stateid,
6936 task->tk_msg.rpc_cred);
6938 case -NFS4ERR_BAD_STATEID:
6939 case -NFS4ERR_STALE_STATEID:
6940 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6942 rpc_restart_call_prepare(task);
6944 case -NFS4ERR_OLD_STATEID:
6945 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6947 rpc_restart_call_prepare(task);
6950 task->tk_status = nfs4_async_handle_exception(task,
6951 calldata->server, task->tk_status,
6953 if (exception.retry)
6954 rpc_restart_call_prepare(task);
6956 nfs_release_seqid(calldata->arg.seqid);
6959 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6961 struct nfs4_unlockdata *calldata = data;
6963 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6964 nfs_async_iocounter_wait(task, calldata->l_ctx))
6967 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6969 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6970 /* Note: exit _without_ running nfs4_locku_done */
6973 calldata->timestamp = jiffies;
6974 if (nfs4_setup_sequence(calldata->server->nfs_client,
6975 &calldata->arg.seq_args,
6976 &calldata->res.seq_res,
6978 nfs_release_seqid(calldata->arg.seqid);
6981 task->tk_action = NULL;
6983 nfs4_sequence_done(task, &calldata->res.seq_res);
6986 static const struct rpc_call_ops nfs4_locku_ops = {
6987 .rpc_call_prepare = nfs4_locku_prepare,
6988 .rpc_call_done = nfs4_locku_done,
6989 .rpc_release = nfs4_locku_release_calldata,
6992 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6993 struct nfs_open_context *ctx,
6994 struct nfs4_lock_state *lsp,
6995 struct nfs_seqid *seqid)
6997 struct nfs4_unlockdata *data;
6998 struct rpc_message msg = {
6999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
7000 .rpc_cred = ctx->cred,
7002 struct rpc_task_setup task_setup_data = {
7003 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
7004 .rpc_message = &msg,
7005 .callback_ops = &nfs4_locku_ops,
7006 .workqueue = nfsiod_workqueue,
7007 .flags = RPC_TASK_ASYNC,
7010 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE))
7011 task_setup_data.flags |= RPC_TASK_MOVEABLE;
7013 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
7014 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
7016 /* Ensure this is an unlock - when canceling a lock, the
7017 * canceled lock is passed in, and it won't be an unlock.
7019 fl->fl_type = F_UNLCK;
7020 if (fl->fl_flags & FL_CLOSE)
7021 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
7023 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
7025 nfs_free_seqid(seqid);
7026 return ERR_PTR(-ENOMEM);
7029 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
7030 msg.rpc_argp = &data->arg;
7031 msg.rpc_resp = &data->res;
7032 task_setup_data.callback_data = data;
7033 return rpc_run_task(&task_setup_data);
7036 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
7038 struct inode *inode = state->inode;
7039 struct nfs4_state_owner *sp = state->owner;
7040 struct nfs_inode *nfsi = NFS_I(inode);
7041 struct nfs_seqid *seqid;
7042 struct nfs4_lock_state *lsp;
7043 struct rpc_task *task;
7044 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
7046 unsigned char fl_flags = request->fl_flags;
7048 status = nfs4_set_lock_state(state, request);
7049 /* Unlock _before_ we do the RPC call */
7050 request->fl_flags |= FL_EXISTS;
7051 /* Exclude nfs_delegation_claim_locks() */
7052 mutex_lock(&sp->so_delegreturn_mutex);
7053 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
7054 down_read(&nfsi->rwsem);
7055 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
7056 up_read(&nfsi->rwsem);
7057 mutex_unlock(&sp->so_delegreturn_mutex);
7060 lsp = request->fl_u.nfs4_fl.owner;
7061 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags);
7062 up_read(&nfsi->rwsem);
7063 mutex_unlock(&sp->so_delegreturn_mutex);
7066 /* Is this a delegated lock? */
7067 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
7069 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
7070 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
7074 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
7075 status = PTR_ERR(task);
7078 status = rpc_wait_for_completion_task(task);
7081 request->fl_flags = fl_flags;
7082 trace_nfs4_unlock(request, state, F_SETLK, status);
7086 struct nfs4_lockdata {
7087 struct nfs_lock_args arg;
7088 struct nfs_lock_res res;
7089 struct nfs4_lock_state *lsp;
7090 struct nfs_open_context *ctx;
7091 struct file_lock fl;
7092 unsigned long timestamp;
7095 struct nfs_server *server;
7098 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
7099 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
7102 struct nfs4_lockdata *p;
7103 struct inode *inode = lsp->ls_state->inode;
7104 struct nfs_server *server = NFS_SERVER(inode);
7105 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
7107 p = kzalloc(sizeof(*p), gfp_mask);
7111 p->arg.fh = NFS_FH(inode);
7113 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
7114 if (IS_ERR(p->arg.open_seqid))
7116 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
7117 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
7118 if (IS_ERR(p->arg.lock_seqid))
7119 goto out_free_seqid;
7120 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
7121 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
7122 p->arg.lock_owner.s_dev = server->s_dev;
7123 p->res.lock_seqid = p->arg.lock_seqid;
7126 p->ctx = get_nfs_open_context(ctx);
7127 locks_init_lock(&p->fl);
7128 locks_copy_lock(&p->fl, fl);
7131 nfs_free_seqid(p->arg.open_seqid);
7137 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
7139 struct nfs4_lockdata *data = calldata;
7140 struct nfs4_state *state = data->lsp->ls_state;
7142 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
7144 /* Do we need to do an open_to_lock_owner? */
7145 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
7146 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
7147 goto out_release_lock_seqid;
7149 nfs4_stateid_copy(&data->arg.open_stateid,
7150 &state->open_stateid);
7151 data->arg.new_lock_owner = 1;
7152 data->res.open_seqid = data->arg.open_seqid;
7154 data->arg.new_lock_owner = 0;
7155 nfs4_stateid_copy(&data->arg.lock_stateid,
7156 &data->lsp->ls_stateid);
7158 if (!nfs4_valid_open_stateid(state)) {
7159 data->rpc_status = -EBADF;
7160 task->tk_action = NULL;
7161 goto out_release_open_seqid;
7163 data->timestamp = jiffies;
7164 if (nfs4_setup_sequence(data->server->nfs_client,
7165 &data->arg.seq_args,
7169 out_release_open_seqid:
7170 nfs_release_seqid(data->arg.open_seqid);
7171 out_release_lock_seqid:
7172 nfs_release_seqid(data->arg.lock_seqid);
7174 nfs4_sequence_done(task, &data->res.seq_res);
7175 dprintk("%s: ret = %d\n", __func__, data->rpc_status);
7178 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
7180 struct nfs4_lockdata *data = calldata;
7181 struct nfs4_lock_state *lsp = data->lsp;
7183 if (!nfs4_sequence_done(task, &data->res.seq_res))
7186 data->rpc_status = task->tk_status;
7187 switch (task->tk_status) {
7189 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
7191 if (data->arg.new_lock && !data->cancelled) {
7192 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
7193 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
7196 if (data->arg.new_lock_owner != 0) {
7197 nfs_confirm_seqid(&lsp->ls_seqid, 0);
7198 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
7199 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
7200 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
7203 case -NFS4ERR_OLD_STATEID:
7204 if (data->arg.new_lock_owner != 0 &&
7205 nfs4_refresh_open_old_stateid(&data->arg.open_stateid,
7208 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp))
7211 case -NFS4ERR_BAD_STATEID:
7212 case -NFS4ERR_STALE_STATEID:
7213 case -NFS4ERR_EXPIRED:
7214 if (data->arg.new_lock_owner != 0) {
7215 if (!nfs4_stateid_match(&data->arg.open_stateid,
7216 &lsp->ls_state->open_stateid))
7218 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
7223 dprintk("%s: ret = %d!\n", __func__, data->rpc_status);
7226 if (!data->cancelled)
7227 rpc_restart_call_prepare(task);
7231 static void nfs4_lock_release(void *calldata)
7233 struct nfs4_lockdata *data = calldata;
7235 nfs_free_seqid(data->arg.open_seqid);
7236 if (data->cancelled && data->rpc_status == 0) {
7237 struct rpc_task *task;
7238 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7239 data->arg.lock_seqid);
7241 rpc_put_task_async(task);
7242 dprintk("%s: cancelling lock!\n", __func__);
7244 nfs_free_seqid(data->arg.lock_seqid);
7245 nfs4_put_lock_state(data->lsp);
7246 put_nfs_open_context(data->ctx);
7250 static const struct rpc_call_ops nfs4_lock_ops = {
7251 .rpc_call_prepare = nfs4_lock_prepare,
7252 .rpc_call_done = nfs4_lock_done,
7253 .rpc_release = nfs4_lock_release,
7256 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7259 case -NFS4ERR_ADMIN_REVOKED:
7260 case -NFS4ERR_EXPIRED:
7261 case -NFS4ERR_BAD_STATEID:
7262 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
7263 if (new_lock_owner != 0 ||
7264 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
7265 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
7267 case -NFS4ERR_STALE_STATEID:
7268 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
7269 nfs4_schedule_lease_recovery(server->nfs_client);
7273 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
7275 struct nfs4_lockdata *data;
7276 struct rpc_task *task;
7277 struct rpc_message msg = {
7278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7279 .rpc_cred = state->owner->so_cred,
7281 struct rpc_task_setup task_setup_data = {
7282 .rpc_client = NFS_CLIENT(state->inode),
7283 .rpc_message = &msg,
7284 .callback_ops = &nfs4_lock_ops,
7285 .workqueue = nfsiod_workqueue,
7286 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
7290 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE))
7291 task_setup_data.flags |= RPC_TASK_MOVEABLE;
7293 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
7294 fl->fl_u.nfs4_fl.owner, GFP_KERNEL);
7298 data->arg.block = 1;
7299 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7300 recovery_type > NFS_LOCK_NEW);
7301 msg.rpc_argp = &data->arg;
7302 msg.rpc_resp = &data->res;
7303 task_setup_data.callback_data = data;
7304 if (recovery_type > NFS_LOCK_NEW) {
7305 if (recovery_type == NFS_LOCK_RECLAIM)
7306 data->arg.reclaim = NFS_LOCK_RECLAIM;
7308 data->arg.new_lock = 1;
7309 task = rpc_run_task(&task_setup_data);
7311 return PTR_ERR(task);
7312 ret = rpc_wait_for_completion_task(task);
7314 ret = data->rpc_status;
7316 nfs4_handle_setlk_error(data->server, data->lsp,
7317 data->arg.new_lock_owner, ret);
7319 data->cancelled = true;
7320 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
7322 dprintk("%s: ret = %d\n", __func__, ret);
7326 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7328 struct nfs_server *server = NFS_SERVER(state->inode);
7329 struct nfs4_exception exception = {
7330 .inode = state->inode,
7335 /* Cache the lock if possible... */
7336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7338 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
7339 if (err != -NFS4ERR_DELAY)
7341 nfs4_handle_exception(server, err, &exception);
7342 } while (exception.retry);
7346 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7348 struct nfs_server *server = NFS_SERVER(state->inode);
7349 struct nfs4_exception exception = {
7350 .inode = state->inode,
7354 err = nfs4_set_lock_state(state, request);
7357 if (!recover_lost_locks) {
7358 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7364 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
7368 case -NFS4ERR_GRACE:
7369 case -NFS4ERR_DELAY:
7370 nfs4_handle_exception(server, err, &exception);
7373 } while (exception.retry);
7378 #if defined(CONFIG_NFS_V4_1)
7379 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7381 struct nfs4_lock_state *lsp;
7384 status = nfs4_set_lock_state(state, request);
7387 lsp = request->fl_u.nfs4_fl.owner;
7388 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7389 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7391 return nfs4_lock_expired(state, request);
7395 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7397 struct nfs_inode *nfsi = NFS_I(state->inode);
7398 struct nfs4_state_owner *sp = state->owner;
7399 unsigned char fl_flags = request->fl_flags;
7402 request->fl_flags |= FL_ACCESS;
7403 status = locks_lock_inode_wait(state->inode, request);
7406 mutex_lock(&sp->so_delegreturn_mutex);
7407 down_read(&nfsi->rwsem);
7408 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
7409 /* Yes: cache locks! */
7410 /* ...but avoid races with delegation recall... */
7411 request->fl_flags = fl_flags & ~FL_SLEEP;
7412 status = locks_lock_inode_wait(state->inode, request);
7413 up_read(&nfsi->rwsem);
7414 mutex_unlock(&sp->so_delegreturn_mutex);
7417 up_read(&nfsi->rwsem);
7418 mutex_unlock(&sp->so_delegreturn_mutex);
7419 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
7421 request->fl_flags = fl_flags;
7425 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7427 struct nfs4_exception exception = {
7429 .inode = state->inode,
7430 .interruptible = true,
7435 err = _nfs4_proc_setlk(state, cmd, request);
7436 if (err == -NFS4ERR_DENIED)
7438 err = nfs4_handle_exception(NFS_SERVER(state->inode),
7440 } while (exception.retry);
7444 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7445 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7448 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7449 struct file_lock *request)
7451 int status = -ERESTARTSYS;
7452 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7454 while(!signalled()) {
7455 status = nfs4_proc_setlk(state, cmd, request);
7456 if ((status != -EAGAIN) || IS_SETLK(cmd))
7458 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE);
7459 schedule_timeout(timeout);
7461 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7462 status = -ERESTARTSYS;
7467 #ifdef CONFIG_NFS_V4_1
7468 struct nfs4_lock_waiter {
7469 struct inode *inode;
7470 struct nfs_lowner owner;
7471 wait_queue_entry_t wait;
7475 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
7477 struct nfs4_lock_waiter *waiter =
7478 container_of(wait, struct nfs4_lock_waiter, wait);
7480 /* NULL key means to wake up everyone */
7482 struct cb_notify_lock_args *cbnl = key;
7483 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
7484 *wowner = &waiter->owner;
7486 /* Only wake if the callback was for the same owner. */
7487 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7490 /* Make sure it's for the right inode */
7491 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7495 return woken_wake_function(wait, mode, flags, key);
7499 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7501 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7502 struct nfs_server *server = NFS_SERVER(state->inode);
7503 struct nfs_client *clp = server->nfs_client;
7504 wait_queue_head_t *q = &clp->cl_lock_waitq;
7505 struct nfs4_lock_waiter waiter = {
7506 .inode = state->inode,
7507 .owner = { .clientid = clp->cl_clientid,
7508 .id = lsp->ls_seqid.owner_id,
7509 .s_dev = server->s_dev },
7513 /* Don't bother with waitqueue if we don't expect a callback */
7514 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7515 return nfs4_retry_setlk_simple(state, cmd, request);
7517 init_wait(&waiter.wait);
7518 waiter.wait.func = nfs4_wake_lock_waiter;
7519 add_wait_queue(q, &waiter.wait);
7522 status = nfs4_proc_setlk(state, cmd, request);
7523 if (status != -EAGAIN || IS_SETLK(cmd))
7526 status = -ERESTARTSYS;
7527 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE,
7528 NFS4_LOCK_MAXTIMEOUT);
7529 } while (!signalled());
7531 remove_wait_queue(q, &waiter.wait);
7535 #else /* !CONFIG_NFS_V4_1 */
7537 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7539 return nfs4_retry_setlk_simple(state, cmd, request);
7544 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7546 struct nfs_open_context *ctx;
7547 struct nfs4_state *state;
7550 /* verify open state */
7551 ctx = nfs_file_open_context(filp);
7554 if (IS_GETLK(cmd)) {
7556 return nfs4_proc_getlk(state, F_GETLK, request);
7560 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7563 if (request->fl_type == F_UNLCK) {
7565 return nfs4_proc_unlck(state, cmd, request);
7572 if ((request->fl_flags & FL_POSIX) &&
7573 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7577 * Don't rely on the VFS having checked the file open mode,
7578 * since it won't do this for flock() locks.
7580 switch (request->fl_type) {
7582 if (!(filp->f_mode & FMODE_READ))
7586 if (!(filp->f_mode & FMODE_WRITE))
7590 status = nfs4_set_lock_state(state, request);
7594 return nfs4_retry_setlk(state, cmd, request);
7597 static int nfs4_delete_lease(struct file *file, void **priv)
7599 return generic_setlease(file, F_UNLCK, NULL, priv);
7602 static int nfs4_add_lease(struct file *file, int arg, struct file_lock **lease,
7605 struct inode *inode = file_inode(file);
7606 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE;
7609 /* No delegation, no lease */
7610 if (!nfs4_have_delegation(inode, type))
7612 ret = generic_setlease(file, arg, lease, priv);
7613 if (ret || nfs4_have_delegation(inode, type))
7615 /* We raced with a delegation return */
7616 nfs4_delete_lease(file, priv);
7620 int nfs4_proc_setlease(struct file *file, int arg, struct file_lock **lease,
7626 return nfs4_add_lease(file, arg, lease, priv);
7628 return nfs4_delete_lease(file, priv);
7634 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
7636 struct nfs_server *server = NFS_SERVER(state->inode);
7639 err = nfs4_set_lock_state(state, fl);
7643 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7644 if (err != -NFS4ERR_DELAY)
7647 } while (err == -NFS4ERR_DELAY);
7648 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
7651 struct nfs_release_lockowner_data {
7652 struct nfs4_lock_state *lsp;
7653 struct nfs_server *server;
7654 struct nfs_release_lockowner_args args;
7655 struct nfs_release_lockowner_res res;
7656 unsigned long timestamp;
7659 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7661 struct nfs_release_lockowner_data *data = calldata;
7662 struct nfs_server *server = data->server;
7663 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7664 &data->res.seq_res, task);
7665 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7666 data->timestamp = jiffies;
7669 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7671 struct nfs_release_lockowner_data *data = calldata;
7672 struct nfs_server *server = data->server;
7674 nfs40_sequence_done(task, &data->res.seq_res);
7676 switch (task->tk_status) {
7678 renew_lease(server, data->timestamp);
7680 case -NFS4ERR_STALE_CLIENTID:
7681 case -NFS4ERR_EXPIRED:
7682 nfs4_schedule_lease_recovery(server->nfs_client);
7684 case -NFS4ERR_LEASE_MOVED:
7685 case -NFS4ERR_DELAY:
7686 if (nfs4_async_handle_error(task, server,
7687 NULL, NULL) == -EAGAIN)
7688 rpc_restart_call_prepare(task);
7692 static void nfs4_release_lockowner_release(void *calldata)
7694 struct nfs_release_lockowner_data *data = calldata;
7695 nfs4_free_lock_state(data->server, data->lsp);
7699 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
7700 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7701 .rpc_call_done = nfs4_release_lockowner_done,
7702 .rpc_release = nfs4_release_lockowner_release,
7706 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
7708 struct nfs_release_lockowner_data *data;
7709 struct rpc_message msg = {
7710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7713 if (server->nfs_client->cl_mvops->minor_version != 0)
7716 data = kmalloc(sizeof(*data), GFP_KERNEL);
7720 data->server = server;
7721 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7722 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7723 data->args.lock_owner.s_dev = server->s_dev;
7725 msg.rpc_argp = &data->args;
7726 msg.rpc_resp = &data->res;
7727 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
7728 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
7731 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7733 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
7734 struct mnt_idmap *idmap,
7735 struct dentry *unused, struct inode *inode,
7736 const char *key, const void *buf,
7737 size_t buflen, int flags)
7739 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL);
7742 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
7743 struct dentry *unused, struct inode *inode,
7744 const char *key, void *buf, size_t buflen)
7746 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL);
7749 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
7751 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL);
7754 #if defined(CONFIG_NFS_V4_1)
7755 #define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl"
7757 static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler,
7758 struct mnt_idmap *idmap,
7759 struct dentry *unused, struct inode *inode,
7760 const char *key, const void *buf,
7761 size_t buflen, int flags)
7763 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL);
7766 static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler,
7767 struct dentry *unused, struct inode *inode,
7768 const char *key, void *buf, size_t buflen)
7770 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL);
7773 static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry)
7775 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL);
7778 #define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl"
7780 static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler,
7781 struct mnt_idmap *idmap,
7782 struct dentry *unused, struct inode *inode,
7783 const char *key, const void *buf,
7784 size_t buflen, int flags)
7786 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL);
7789 static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler,
7790 struct dentry *unused, struct inode *inode,
7791 const char *key, void *buf, size_t buflen)
7793 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL);
7796 static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry)
7798 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL);
7803 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
7805 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
7806 struct mnt_idmap *idmap,
7807 struct dentry *unused, struct inode *inode,
7808 const char *key, const void *buf,
7809 size_t buflen, int flags)
7811 if (security_ismaclabel(key))
7812 return nfs4_set_security_label(inode, buf, buflen);
7817 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
7818 struct dentry *unused, struct inode *inode,
7819 const char *key, void *buf, size_t buflen)
7821 if (security_ismaclabel(key))
7822 return nfs4_get_security_label(inode, buf, buflen);
7827 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7831 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7832 len = security_inode_listsecurity(inode, list, list_len);
7833 if (len >= 0 && list_len && len > list_len)
7839 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7840 .prefix = XATTR_SECURITY_PREFIX,
7841 .get = nfs4_xattr_get_nfs4_label,
7842 .set = nfs4_xattr_set_nfs4_label,
7848 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7855 #ifdef CONFIG_NFS_V4_2
7856 static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
7857 struct mnt_idmap *idmap,
7858 struct dentry *unused, struct inode *inode,
7859 const char *key, const void *buf,
7860 size_t buflen, int flags)
7865 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7869 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA*
7870 * flags right now. Handling of xattr operations use the normal
7871 * file read/write permissions.
7873 * Just in case the server has other ideas (which RFC 8276 allows),
7874 * do a cached access check for the XA* flags to possibly avoid
7875 * doing an RPC and getting EACCES back.
7877 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7878 if (!(mask & NFS_ACCESS_XAWRITE))
7883 ret = nfs42_proc_removexattr(inode, key);
7885 nfs4_xattr_cache_remove(inode, key);
7887 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7889 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7895 static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7896 struct dentry *unused, struct inode *inode,
7897 const char *key, void *buf, size_t buflen)
7902 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7905 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7906 if (!(mask & NFS_ACCESS_XAREAD))
7910 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
7914 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7915 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7918 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7924 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7933 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7936 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7937 if (!(mask & NFS_ACCESS_XALIST))
7941 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
7945 ret = nfs4_xattr_cache_list(inode, list, list_len);
7946 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7951 buflen = list_len ? list_len : XATTR_LIST_MAX;
7952 buf = list_len ? list : NULL;
7956 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7969 nfs4_xattr_cache_set_list(inode, list, size);
7977 nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7981 #endif /* CONFIG_NFS_V4_2 */
7984 * nfs_fhget will use either the mounted_on_fileid or the fileid
7986 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7990 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
7991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
7994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
7995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
7996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
8000 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
8001 const struct qstr *name,
8002 struct nfs4_fs_locations *fs_locations,
8005 struct nfs_server *server = NFS_SERVER(dir);
8007 struct nfs4_fs_locations_arg args = {
8008 .dir_fh = NFS_FH(dir),
8013 struct nfs4_fs_locations_res res = {
8014 .fs_locations = fs_locations,
8016 struct rpc_message msg = {
8017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8023 dprintk("%s: start\n", __func__);
8025 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
8026 bitmask[1] = nfs4_fattr_bitmap[1];
8028 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
8029 * is not supported */
8030 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
8031 bitmask[0] &= ~FATTR4_WORD0_FILEID;
8033 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
8035 nfs_fattr_init(fs_locations->fattr);
8036 fs_locations->server = server;
8037 fs_locations->nlocations = 0;
8038 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
8039 dprintk("%s: returned status = %d\n", __func__, status);
8043 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
8044 const struct qstr *name,
8045 struct nfs4_fs_locations *fs_locations,
8048 struct nfs4_exception exception = {
8049 .interruptible = true,
8053 err = _nfs4_proc_fs_locations(client, dir, name,
8054 fs_locations, page);
8055 trace_nfs4_get_fs_locations(dir, name, err);
8056 err = nfs4_handle_exception(NFS_SERVER(dir), err,
8058 } while (exception.retry);
8063 * This operation also signals the server that this client is
8064 * performing migration recovery. The server can stop returning
8065 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
8066 * appended to this compound to identify the client ID which is
8067 * performing recovery.
8069 static int _nfs40_proc_get_locations(struct nfs_server *server,
8070 struct nfs_fh *fhandle,
8071 struct nfs4_fs_locations *locations,
8072 struct page *page, const struct cred *cred)
8074 struct rpc_clnt *clnt = server->client;
8076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
8078 struct nfs4_fs_locations_arg args = {
8079 .clientid = server->nfs_client->cl_clientid,
8083 .migration = 1, /* skip LOOKUP */
8084 .renew = 1, /* append RENEW */
8086 struct nfs4_fs_locations_res res = {
8087 .fs_locations = locations,
8091 struct rpc_message msg = {
8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8097 unsigned long now = jiffies;
8100 nfs_fattr_init(locations->fattr);
8101 locations->server = server;
8102 locations->nlocations = 0;
8104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
8105 status = nfs4_call_sync_sequence(clnt, server, &msg,
8106 &args.seq_args, &res.seq_res);
8110 renew_lease(server, now);
8114 #ifdef CONFIG_NFS_V4_1
8117 * This operation also signals the server that this client is
8118 * performing migration recovery. The server can stop asserting
8119 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
8120 * performing this operation is identified in the SEQUENCE
8121 * operation in this compound.
8123 * When the client supports GETATTR(fs_locations_info), it can
8124 * be plumbed in here.
8126 static int _nfs41_proc_get_locations(struct nfs_server *server,
8127 struct nfs_fh *fhandle,
8128 struct nfs4_fs_locations *locations,
8129 struct page *page, const struct cred *cred)
8131 struct rpc_clnt *clnt = server->client;
8133 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
8135 struct nfs4_fs_locations_arg args = {
8139 .migration = 1, /* skip LOOKUP */
8141 struct nfs4_fs_locations_res res = {
8142 .fs_locations = locations,
8145 struct rpc_message msg = {
8146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8151 struct nfs4_call_sync_data data = {
8152 .seq_server = server,
8153 .seq_args = &args.seq_args,
8154 .seq_res = &res.seq_res,
8156 struct rpc_task_setup task_setup_data = {
8158 .rpc_message = &msg,
8159 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
8160 .callback_data = &data,
8161 .flags = RPC_TASK_NO_ROUND_ROBIN,
8165 nfs_fattr_init(locations->fattr);
8166 locations->server = server;
8167 locations->nlocations = 0;
8169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
8170 status = nfs4_call_sync_custom(&task_setup_data);
8171 if (status == NFS4_OK &&
8172 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8173 status = -NFS4ERR_LEASE_MOVED;
8177 #endif /* CONFIG_NFS_V4_1 */
8180 * nfs4_proc_get_locations - discover locations for a migrated FSID
8181 * @server: pointer to nfs_server to process
8182 * @fhandle: pointer to the kernel NFS client file handle
8183 * @locations: result of query
8185 * @cred: credential to use for this operation
8187 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
8188 * operation failed, or a negative errno if a local error occurred.
8190 * On success, "locations" is filled in, but if the server has
8191 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
8194 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
8195 * from this client that require migration recovery.
8197 int nfs4_proc_get_locations(struct nfs_server *server,
8198 struct nfs_fh *fhandle,
8199 struct nfs4_fs_locations *locations,
8200 struct page *page, const struct cred *cred)
8202 struct nfs_client *clp = server->nfs_client;
8203 const struct nfs4_mig_recovery_ops *ops =
8204 clp->cl_mvops->mig_recovery_ops;
8205 struct nfs4_exception exception = {
8206 .interruptible = true,
8210 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8211 (unsigned long long)server->fsid.major,
8212 (unsigned long long)server->fsid.minor,
8214 nfs_display_fhandle(fhandle, __func__);
8217 status = ops->get_locations(server, fhandle, locations, page,
8219 if (status != -NFS4ERR_DELAY)
8221 nfs4_handle_exception(server, status, &exception);
8222 } while (exception.retry);
8227 * This operation also signals the server that this client is
8228 * performing "lease moved" recovery. The server can stop
8229 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
8230 * is appended to this compound to identify the client ID which is
8231 * performing recovery.
8233 static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
8235 struct nfs_server *server = NFS_SERVER(inode);
8236 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
8237 struct rpc_clnt *clnt = server->client;
8238 struct nfs4_fsid_present_arg args = {
8239 .fh = NFS_FH(inode),
8240 .clientid = clp->cl_clientid,
8241 .renew = 1, /* append RENEW */
8243 struct nfs4_fsid_present_res res = {
8246 struct rpc_message msg = {
8247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8252 unsigned long now = jiffies;
8255 res.fh = nfs_alloc_fhandle();
8259 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
8260 status = nfs4_call_sync_sequence(clnt, server, &msg,
8261 &args.seq_args, &res.seq_res);
8262 nfs_free_fhandle(res.fh);
8266 do_renew_lease(clp, now);
8270 #ifdef CONFIG_NFS_V4_1
8273 * This operation also signals the server that this client is
8274 * performing "lease moved" recovery. The server can stop asserting
8275 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
8276 * this operation is identified in the SEQUENCE operation in this
8279 static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
8281 struct nfs_server *server = NFS_SERVER(inode);
8282 struct rpc_clnt *clnt = server->client;
8283 struct nfs4_fsid_present_arg args = {
8284 .fh = NFS_FH(inode),
8286 struct nfs4_fsid_present_res res = {
8288 struct rpc_message msg = {
8289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8296 res.fh = nfs_alloc_fhandle();
8300 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
8301 status = nfs4_call_sync_sequence(clnt, server, &msg,
8302 &args.seq_args, &res.seq_res);
8303 nfs_free_fhandle(res.fh);
8304 if (status == NFS4_OK &&
8305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8306 status = -NFS4ERR_LEASE_MOVED;
8310 #endif /* CONFIG_NFS_V4_1 */
8313 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
8314 * @inode: inode on FSID to check
8315 * @cred: credential to use for this operation
8317 * Server indicates whether the FSID is present, moved, or not
8318 * recognized. This operation is necessary to clear a LEASE_MOVED
8319 * condition for this client ID.
8321 * Returns NFS4_OK if the FSID is present on this server,
8322 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
8323 * NFS4ERR code if some error occurred on the server, or a
8324 * negative errno if a local failure occurred.
8326 int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
8328 struct nfs_server *server = NFS_SERVER(inode);
8329 struct nfs_client *clp = server->nfs_client;
8330 const struct nfs4_mig_recovery_ops *ops =
8331 clp->cl_mvops->mig_recovery_ops;
8332 struct nfs4_exception exception = {
8333 .interruptible = true,
8337 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8338 (unsigned long long)server->fsid.major,
8339 (unsigned long long)server->fsid.minor,
8341 nfs_display_fhandle(NFS_FH(inode), __func__);
8344 status = ops->fsid_present(inode, cred);
8345 if (status != -NFS4ERR_DELAY)
8347 nfs4_handle_exception(server, status, &exception);
8348 } while (exception.retry);
8353 * If 'use_integrity' is true and the state managment nfs_client
8354 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
8355 * and the machine credential as per RFC3530bis and RFC5661 Security
8356 * Considerations sections. Otherwise, just use the user cred with the
8357 * filesystem's rpc_client.
8359 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8363 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
8364 struct nfs4_secinfo_arg args = {
8365 .dir_fh = NFS_FH(dir),
8368 struct nfs4_secinfo_res res = {
8371 struct rpc_message msg = {
8372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8376 struct nfs4_call_sync_data data = {
8377 .seq_server = NFS_SERVER(dir),
8378 .seq_args = &args.seq_args,
8379 .seq_res = &res.seq_res,
8381 struct rpc_task_setup task_setup = {
8383 .rpc_message = &msg,
8384 .callback_ops = clp->cl_mvops->call_sync_ops,
8385 .callback_data = &data,
8386 .flags = RPC_TASK_NO_ROUND_ROBIN,
8388 const struct cred *cred = NULL;
8390 if (use_integrity) {
8391 clnt = clp->cl_rpcclient;
8392 task_setup.rpc_client = clnt;
8394 cred = nfs4_get_clid_cred(clp);
8395 msg.rpc_cred = cred;
8398 dprintk("NFS call secinfo %s\n", name->name);
8400 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8402 status = nfs4_call_sync_custom(&task_setup);
8404 dprintk("NFS reply secinfo: %d\n", status);
8410 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8411 struct nfs4_secinfo_flavors *flavors)
8413 struct nfs4_exception exception = {
8414 .interruptible = true,
8418 err = -NFS4ERR_WRONGSEC;
8420 /* try to use integrity protection with machine cred */
8421 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8422 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8425 * if unable to use integrity protection, or SECINFO with
8426 * integrity protection returns NFS4ERR_WRONGSEC (which is
8427 * disallowed by spec, but exists in deployed servers) use
8428 * the current filesystem's rpc_client and the user cred.
8430 if (err == -NFS4ERR_WRONGSEC)
8431 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8433 trace_nfs4_secinfo(dir, name, err);
8434 err = nfs4_handle_exception(NFS_SERVER(dir), err,
8436 } while (exception.retry);
8440 #ifdef CONFIG_NFS_V4_1
8442 * Check the exchange flags returned by the server for invalid flags, having
8443 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
8446 static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
8448 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8450 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
8452 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8453 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8455 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8459 return -NFS4ERR_INVAL;
8463 nfs41_same_server_scope(struct nfs41_server_scope *a,
8464 struct nfs41_server_scope *b)
8466 if (a->server_scope_sz != b->server_scope_sz)
8468 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
8472 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8474 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
8475 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
8476 struct nfs_client *clp = args->client;
8478 switch (task->tk_status) {
8479 case -NFS4ERR_BADSESSION:
8480 case -NFS4ERR_DEADSESSION:
8481 nfs4_schedule_session_recovery(clp->cl_session,
8485 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8486 res->dir != NFS4_CDFS4_BOTH) {
8487 rpc_task_close_connection(task);
8488 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8489 rpc_restart_call(task);
8493 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
8494 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
8498 * nfs4_proc_bind_one_conn_to_session()
8500 * The 4.1 client currently uses the same TCP connection for the
8501 * fore and backchannel.
8504 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8505 struct rpc_xprt *xprt,
8506 struct nfs_client *clp,
8507 const struct cred *cred)
8510 struct nfs41_bind_conn_to_session_args args = {
8512 .dir = NFS4_CDFC4_FORE_OR_BOTH,
8515 struct nfs41_bind_conn_to_session_res res;
8516 struct rpc_message msg = {
8518 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
8523 struct rpc_task_setup task_setup_data = {
8526 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
8527 .rpc_message = &msg,
8528 .flags = RPC_TASK_TIMEOUT,
8530 struct rpc_task *task;
8532 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8533 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8534 args.dir = NFS4_CDFC4_FORE;
8536 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
8537 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8538 args.dir = NFS4_CDFC4_FORE;
8540 task = rpc_run_task(&task_setup_data);
8541 if (!IS_ERR(task)) {
8542 status = task->tk_status;
8545 status = PTR_ERR(task);
8546 trace_nfs4_bind_conn_to_session(clp, status);
8548 if (memcmp(res.sessionid.data,
8549 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8550 dprintk("NFS: %s: Session ID mismatch\n", __func__);
8553 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
8554 dprintk("NFS: %s: Unexpected direction from server\n",
8558 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
8559 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8568 struct rpc_bind_conn_calldata {
8569 struct nfs_client *clp;
8570 const struct cred *cred;
8574 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8575 struct rpc_xprt *xprt,
8578 struct rpc_bind_conn_calldata *p = calldata;
8580 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8583 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
8585 struct rpc_bind_conn_calldata data = {
8589 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8590 nfs4_proc_bind_conn_to_session_callback, &data);
8594 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8595 * and operations we'd like to see to enable certain features in the allow map
8597 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8598 .how = SP4_MACH_CRED,
8599 .enforce.u.words = {
8600 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8601 1 << (OP_EXCHANGE_ID - 32) |
8602 1 << (OP_CREATE_SESSION - 32) |
8603 1 << (OP_DESTROY_SESSION - 32) |
8604 1 << (OP_DESTROY_CLIENTID - 32)
8607 [0] = 1 << (OP_CLOSE) |
8608 1 << (OP_OPEN_DOWNGRADE) |
8610 1 << (OP_DELEGRETURN) |
8612 [1] = 1 << (OP_SECINFO - 32) |
8613 1 << (OP_SECINFO_NO_NAME - 32) |
8614 1 << (OP_LAYOUTRETURN - 32) |
8615 1 << (OP_TEST_STATEID - 32) |
8616 1 << (OP_FREE_STATEID - 32) |
8617 1 << (OP_WRITE - 32)
8622 * Select the state protection mode for client `clp' given the server results
8623 * from exchange_id in `sp'.
8625 * Returns 0 on success, negative errno otherwise.
8627 static int nfs4_sp4_select_mode(struct nfs_client *clp,
8628 struct nfs41_state_protection *sp)
8630 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8631 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8632 1 << (OP_EXCHANGE_ID - 32) |
8633 1 << (OP_CREATE_SESSION - 32) |
8634 1 << (OP_DESTROY_SESSION - 32) |
8635 1 << (OP_DESTROY_CLIENTID - 32)
8637 unsigned long flags = 0;
8641 if (sp->how == SP4_MACH_CRED) {
8642 /* Print state protect result */
8643 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8644 for (i = 0; i <= LAST_NFS4_OP; i++) {
8645 if (test_bit(i, sp->enforce.u.longs))
8646 dfprintk(MOUNT, " enforce op %d\n", i);
8647 if (test_bit(i, sp->allow.u.longs))
8648 dfprintk(MOUNT, " allow op %d\n", i);
8651 /* make sure nothing is on enforce list that isn't supported */
8652 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8653 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8654 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8661 * Minimal mode - state operations are allowed to use machine
8662 * credential. Note this already happens by default, so the
8663 * client doesn't have to do anything more than the negotiation.
8665 * NOTE: we don't care if EXCHANGE_ID is in the list -
8666 * we're already using the machine cred for exchange_id
8667 * and will never use a different cred.
8669 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8670 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8671 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8672 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8673 dfprintk(MOUNT, "sp4_mach_cred:\n");
8674 dfprintk(MOUNT, " minimal mode enabled\n");
8675 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
8677 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
8682 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
8683 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8684 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
8685 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8686 dfprintk(MOUNT, " cleanup mode enabled\n");
8687 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
8690 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8691 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
8692 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
8695 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8696 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8697 dfprintk(MOUNT, " secinfo mode enabled\n");
8698 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8701 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8702 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8703 dfprintk(MOUNT, " stateid mode enabled\n");
8704 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
8707 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8708 dfprintk(MOUNT, " write mode enabled\n");
8709 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8712 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8713 dfprintk(MOUNT, " commit mode enabled\n");
8714 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8718 clp->cl_sp4_flags = flags;
8722 struct nfs41_exchange_id_data {
8723 struct nfs41_exchange_id_res res;
8724 struct nfs41_exchange_id_args args;
8727 static void nfs4_exchange_id_release(void *data)
8729 struct nfs41_exchange_id_data *cdata =
8730 (struct nfs41_exchange_id_data *)data;
8732 nfs_put_client(cdata->args.client);
8733 kfree(cdata->res.impl_id);
8734 kfree(cdata->res.server_scope);
8735 kfree(cdata->res.server_owner);
8739 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8740 .rpc_release = nfs4_exchange_id_release,
8744 * _nfs4_proc_exchange_id()
8746 * Wrapper for EXCHANGE_ID operation.
8748 static struct rpc_task *
8749 nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
8750 u32 sp4_how, struct rpc_xprt *xprt)
8752 struct rpc_message msg = {
8753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
8756 struct rpc_task_setup task_setup_data = {
8757 .rpc_client = clp->cl_rpcclient,
8758 .callback_ops = &nfs4_exchange_id_call_ops,
8759 .rpc_message = &msg,
8760 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8762 struct nfs41_exchange_id_data *calldata;
8765 if (!refcount_inc_not_zero(&clp->cl_count))
8766 return ERR_PTR(-EIO);
8769 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8773 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
8775 status = nfs4_init_uniform_client_string(clp);
8779 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8782 if (unlikely(calldata->res.server_owner == NULL))
8785 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
8787 if (unlikely(calldata->res.server_scope == NULL))
8788 goto out_server_owner;
8790 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8791 if (unlikely(calldata->res.impl_id == NULL))
8792 goto out_server_scope;
8796 calldata->args.state_protect.how = SP4_NONE;
8800 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
8810 task_setup_data.rpc_xprt = xprt;
8811 task_setup_data.flags |= RPC_TASK_SOFTCONN;
8812 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8813 sizeof(calldata->args.verifier.data));
8815 calldata->args.client = clp;
8816 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
8817 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8818 #ifdef CONFIG_NFS_V4_1_MIGRATION
8819 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8821 if (test_bit(NFS_CS_DS, &clp->cl_flags))
8822 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS;
8823 msg.rpc_argp = &calldata->args;
8824 msg.rpc_resp = &calldata->res;
8825 task_setup_data.callback_data = calldata;
8827 return rpc_run_task(&task_setup_data);
8830 kfree(calldata->res.impl_id);
8832 kfree(calldata->res.server_scope);
8834 kfree(calldata->res.server_owner);
8838 nfs_put_client(clp);
8839 return ERR_PTR(status);
8843 * _nfs4_proc_exchange_id()
8845 * Wrapper for EXCHANGE_ID operation.
8847 static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
8850 struct rpc_task *task;
8851 struct nfs41_exchange_id_args *argp;
8852 struct nfs41_exchange_id_res *resp;
8853 unsigned long now = jiffies;
8856 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8858 return PTR_ERR(task);
8860 argp = task->tk_msg.rpc_argp;
8861 resp = task->tk_msg.rpc_resp;
8862 status = task->tk_status;
8866 status = nfs4_check_cl_exchange_flags(resp->flags,
8867 clp->cl_mvops->minor_version);
8871 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8875 do_renew_lease(clp, now);
8877 clp->cl_clientid = resp->clientid;
8878 clp->cl_exchange_flags = resp->flags;
8879 clp->cl_seqid = resp->seqid;
8880 /* Client ID is not confirmed */
8881 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8882 clear_bit(NFS4_SESSION_ESTABLISHED,
8883 &clp->cl_session->session_state);
8885 if (clp->cl_serverscope != NULL &&
8886 !nfs41_same_server_scope(clp->cl_serverscope,
8887 resp->server_scope)) {
8888 dprintk("%s: server_scope mismatch detected\n",
8890 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8893 swap(clp->cl_serverowner, resp->server_owner);
8894 swap(clp->cl_serverscope, resp->server_scope);
8895 swap(clp->cl_implid, resp->impl_id);
8897 /* Save the EXCHANGE_ID verifier session trunk tests */
8898 memcpy(clp->cl_confirm.data, argp->verifier.data,
8899 sizeof(clp->cl_confirm.data));
8901 trace_nfs4_exchange_id(clp, status);
8907 * nfs4_proc_exchange_id()
8909 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8911 * Since the clientid has expired, all compounds using sessions
8912 * associated with the stale clientid will be returning
8913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8914 * be in some phase of session reset.
8916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8918 int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
8920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8923 /* try SP4_MACH_CRED if krb5i/p */
8924 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8925 authflavor == RPC_AUTH_GSS_KRB5P) {
8926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
8932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
8936 * nfs4_test_session_trunk
8938 * This is an add_xprt_test() test function called from
8939 * rpc_clnt_setup_test_and_add_xprt.
8941 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8942 * and is dereferrenced in nfs4_exchange_id_release
8944 * Upon success, add the new transport to the rpc_clnt
8946 * @clnt: struct rpc_clnt to get new transport
8947 * @xprt: the rpc_xprt to test
8948 * @data: call data for _nfs4_proc_exchange_id.
8950 void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
8953 struct nfs4_add_xprt_data *adata = data;
8954 struct rpc_task *task;
8959 dprintk("--> %s try %s\n", __func__,
8960 xprt->address_strings[RPC_DISPLAY_ADDR]);
8962 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8965 /* Test connection for session trunking. Async exchange_id call */
8966 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8970 status = task->tk_status;
8972 status = nfs4_detect_session_trunking(adata->clp,
8973 task->tk_msg.rpc_resp, xprt);
8976 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8977 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt,
8978 (struct sockaddr *)&xprt->addr))
8979 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt);
8982 if (status == -NFS4ERR_DELAY) {
8987 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
8989 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
8990 const struct cred *cred)
8992 struct rpc_message msg = {
8993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8999 status = rpc_call_sync(clp->cl_rpcclient, &msg,
9000 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
9001 trace_nfs4_destroy_clientid(clp, status);
9003 dprintk("NFS: Got error %d from the server %s on "
9004 "DESTROY_CLIENTID.", status, clp->cl_hostname);
9008 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
9009 const struct cred *cred)
9014 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
9015 ret = _nfs4_proc_destroy_clientid(clp, cred);
9017 case -NFS4ERR_DELAY:
9018 case -NFS4ERR_CLIENTID_BUSY:
9028 int nfs4_destroy_clientid(struct nfs_client *clp)
9030 const struct cred *cred;
9033 if (clp->cl_mvops->minor_version < 1)
9035 if (clp->cl_exchange_flags == 0)
9037 if (clp->cl_preserve_clid)
9039 cred = nfs4_get_clid_cred(clp);
9040 ret = nfs4_proc_destroy_clientid(clp, cred);
9044 case -NFS4ERR_STALE_CLIENTID:
9045 clp->cl_exchange_flags = 0;
9051 #endif /* CONFIG_NFS_V4_1 */
9053 struct nfs4_get_lease_time_data {
9054 struct nfs4_get_lease_time_args *args;
9055 struct nfs4_get_lease_time_res *res;
9056 struct nfs_client *clp;
9059 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
9062 struct nfs4_get_lease_time_data *data =
9063 (struct nfs4_get_lease_time_data *)calldata;
9065 /* just setup sequence, do not trigger session recovery
9066 since we're invoked within one */
9067 nfs4_setup_sequence(data->clp,
9068 &data->args->la_seq_args,
9069 &data->res->lr_seq_res,
9074 * Called from nfs4_state_manager thread for session setup, so don't recover
9075 * from sequence operation or clientid errors.
9077 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
9079 struct nfs4_get_lease_time_data *data =
9080 (struct nfs4_get_lease_time_data *)calldata;
9082 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
9084 switch (task->tk_status) {
9085 case -NFS4ERR_DELAY:
9086 case -NFS4ERR_GRACE:
9087 rpc_delay(task, NFS4_POLL_RETRY_MIN);
9088 task->tk_status = 0;
9090 case -NFS4ERR_RETRY_UNCACHED_REP:
9091 rpc_restart_call_prepare(task);
9096 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
9097 .rpc_call_prepare = nfs4_get_lease_time_prepare,
9098 .rpc_call_done = nfs4_get_lease_time_done,
9101 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
9103 struct nfs4_get_lease_time_args args;
9104 struct nfs4_get_lease_time_res res = {
9105 .lr_fsinfo = fsinfo,
9107 struct nfs4_get_lease_time_data data = {
9112 struct rpc_message msg = {
9113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
9117 struct rpc_task_setup task_setup = {
9118 .rpc_client = clp->cl_rpcclient,
9119 .rpc_message = &msg,
9120 .callback_ops = &nfs4_get_lease_time_ops,
9121 .callback_data = &data,
9122 .flags = RPC_TASK_TIMEOUT,
9125 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
9126 return nfs4_call_sync_custom(&task_setup);
9129 #ifdef CONFIG_NFS_V4_1
9132 * Initialize the values to be used by the client in CREATE_SESSION
9133 * If nfs4_init_session set the fore channel request and response sizes,
9136 * Set the back channel max_resp_sz_cached to zero to force the client to
9137 * always set csa_cachethis to FALSE because the current implementation
9138 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
9140 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
9141 struct rpc_clnt *clnt)
9143 unsigned int max_rqst_sz, max_resp_sz;
9144 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
9145 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
9147 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
9148 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
9150 /* Fore channel attributes */
9151 args->fc_attrs.max_rqst_sz = max_rqst_sz;
9152 args->fc_attrs.max_resp_sz = max_resp_sz;
9153 args->fc_attrs.max_ops = NFS4_MAX_OPS;
9154 args->fc_attrs.max_reqs = max_session_slots;
9156 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
9157 "max_ops=%u max_reqs=%u\n",
9159 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
9160 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
9162 /* Back channel attributes */
9163 args->bc_attrs.max_rqst_sz = max_bc_payload;
9164 args->bc_attrs.max_resp_sz = max_bc_payload;
9165 args->bc_attrs.max_resp_sz_cached = 0;
9166 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
9167 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
9168 if (args->bc_attrs.max_reqs > max_bc_slots)
9169 args->bc_attrs.max_reqs = max_bc_slots;
9171 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
9172 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
9174 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
9175 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
9176 args->bc_attrs.max_reqs);
9179 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
9180 struct nfs41_create_session_res *res)
9182 struct nfs4_channel_attrs *sent = &args->fc_attrs;
9183 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
9185 if (rcvd->max_resp_sz > sent->max_resp_sz)
9188 * Our requested max_ops is the minimum we need; we're not
9189 * prepared to break up compounds into smaller pieces than that.
9190 * So, no point even trying to continue if the server won't
9193 if (rcvd->max_ops < sent->max_ops)
9195 if (rcvd->max_reqs == 0)
9197 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
9198 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
9202 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
9203 struct nfs41_create_session_res *res)
9205 struct nfs4_channel_attrs *sent = &args->bc_attrs;
9206 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
9208 if (!(res->flags & SESSION4_BACK_CHAN))
9210 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
9212 if (rcvd->max_resp_sz < sent->max_resp_sz)
9214 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
9216 if (rcvd->max_ops > sent->max_ops)
9218 if (rcvd->max_reqs > sent->max_reqs)
9224 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
9225 struct nfs41_create_session_res *res)
9229 ret = nfs4_verify_fore_channel_attrs(args, res);
9232 return nfs4_verify_back_channel_attrs(args, res);
9235 static void nfs4_update_session(struct nfs4_session *session,
9236 struct nfs41_create_session_res *res)
9238 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
9239 /* Mark client id and session as being confirmed */
9240 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
9241 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
9242 session->flags = res->flags;
9243 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
9244 if (res->flags & SESSION4_BACK_CHAN)
9245 memcpy(&session->bc_attrs, &res->bc_attrs,
9246 sizeof(session->bc_attrs));
9249 static int _nfs4_proc_create_session(struct nfs_client *clp,
9250 const struct cred *cred)
9252 struct nfs4_session *session = clp->cl_session;
9253 struct nfs41_create_session_args args = {
9255 .clientid = clp->cl_clientid,
9256 .seqid = clp->cl_seqid,
9257 .cb_program = NFS4_CALLBACK,
9259 struct nfs41_create_session_res res;
9261 struct rpc_message msg = {
9262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
9269 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
9270 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
9272 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9273 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
9274 trace_nfs4_create_session(clp, status);
9277 case -NFS4ERR_STALE_CLIENTID:
9278 case -NFS4ERR_DELAY:
9287 /* Verify the session's negotiated channel_attrs values */
9288 status = nfs4_verify_channel_attrs(&args, &res);
9289 /* Increment the clientid slot sequence id */
9292 nfs4_update_session(session, &res);
9299 * Issues a CREATE_SESSION operation to the server.
9300 * It is the responsibility of the caller to verify the session is
9301 * expired before calling this routine.
9303 int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
9307 struct nfs4_session *session = clp->cl_session;
9308 struct nfs4_add_xprt_data xprtdata = {
9311 struct rpc_add_xprt_test rpcdata = {
9312 .add_xprt_test = clp->cl_mvops->session_trunk,
9316 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
9318 status = _nfs4_proc_create_session(clp, cred);
9322 /* Init or reset the session slot tables */
9323 status = nfs4_setup_session_slot_tables(session);
9324 dprintk("slot table setup returned %d\n", status);
9328 ptr = (unsigned *)&session->sess_id.data[0];
9329 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9330 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
9331 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata);
9337 * Issue the over-the-wire RPC DESTROY_SESSION.
9338 * The caller must serialize access to this routine.
9340 int nfs4_proc_destroy_session(struct nfs4_session *session,
9341 const struct cred *cred)
9343 struct rpc_message msg = {
9344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9345 .rpc_argp = session,
9350 /* session is still being setup */
9351 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9354 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9355 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
9356 trace_nfs4_destroy_session(session->clp, status);
9359 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
9360 "Session has been destroyed regardless...\n", status);
9361 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient);
9366 * Renew the cl_session lease.
9368 struct nfs4_sequence_data {
9369 struct nfs_client *clp;
9370 struct nfs4_sequence_args args;
9371 struct nfs4_sequence_res res;
9374 static void nfs41_sequence_release(void *data)
9376 struct nfs4_sequence_data *calldata = data;
9377 struct nfs_client *clp = calldata->clp;
9379 if (refcount_read(&clp->cl_count) > 1)
9380 nfs4_schedule_state_renewal(clp);
9381 nfs_put_client(clp);
9385 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9387 switch(task->tk_status) {
9388 case -NFS4ERR_DELAY:
9389 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9392 nfs4_schedule_lease_recovery(clp);
9397 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
9399 struct nfs4_sequence_data *calldata = data;
9400 struct nfs_client *clp = calldata->clp;
9402 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9405 trace_nfs4_sequence(clp, task->tk_status);
9406 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) {
9407 dprintk("%s ERROR %d\n", __func__, task->tk_status);
9408 if (refcount_read(&clp->cl_count) == 1)
9411 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9412 rpc_restart_call_prepare(task);
9416 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
9419 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9421 struct nfs4_sequence_data *calldata = data;
9422 struct nfs_client *clp = calldata->clp;
9423 struct nfs4_sequence_args *args;
9424 struct nfs4_sequence_res *res;
9426 args = task->tk_msg.rpc_argp;
9427 res = task->tk_msg.rpc_resp;
9429 nfs4_setup_sequence(clp, args, res, task);
9432 static const struct rpc_call_ops nfs41_sequence_ops = {
9433 .rpc_call_done = nfs41_sequence_call_done,
9434 .rpc_call_prepare = nfs41_sequence_prepare,
9435 .rpc_release = nfs41_sequence_release,
9438 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
9439 const struct cred *cred,
9440 struct nfs4_slot *slot,
9443 struct nfs4_sequence_data *calldata;
9444 struct rpc_message msg = {
9445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9448 struct rpc_task_setup task_setup_data = {
9449 .rpc_client = clp->cl_rpcclient,
9450 .rpc_message = &msg,
9451 .callback_ops = &nfs41_sequence_ops,
9452 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
9454 struct rpc_task *ret;
9456 ret = ERR_PTR(-EIO);
9457 if (!refcount_inc_not_zero(&clp->cl_count))
9460 ret = ERR_PTR(-ENOMEM);
9461 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
9462 if (calldata == NULL)
9464 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
9465 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
9466 msg.rpc_argp = &calldata->args;
9467 msg.rpc_resp = &calldata->res;
9468 calldata->clp = clp;
9469 task_setup_data.callback_data = calldata;
9471 ret = rpc_run_task(&task_setup_data);
9476 nfs_put_client(clp);
9478 nfs41_release_slot(slot);
9482 static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
9484 struct rpc_task *task;
9487 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
9489 task = _nfs41_proc_sequence(clp, cred, NULL, false);
9491 ret = PTR_ERR(task);
9493 rpc_put_task_async(task);
9494 dprintk("<-- %s status=%d\n", __func__, ret);
9498 static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
9500 struct rpc_task *task;
9503 task = _nfs41_proc_sequence(clp, cred, NULL, true);
9505 ret = PTR_ERR(task);
9508 ret = rpc_wait_for_completion_task(task);
9510 ret = task->tk_status;
9513 dprintk("<-- %s status=%d\n", __func__, ret);
9517 struct nfs4_reclaim_complete_data {
9518 struct nfs_client *clp;
9519 struct nfs41_reclaim_complete_args arg;
9520 struct nfs41_reclaim_complete_res res;
9523 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9525 struct nfs4_reclaim_complete_data *calldata = data;
9527 nfs4_setup_sequence(calldata->clp,
9528 &calldata->arg.seq_args,
9529 &calldata->res.seq_res,
9533 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9535 switch(task->tk_status) {
9537 wake_up_all(&clp->cl_lock_waitq);
9539 case -NFS4ERR_COMPLETE_ALREADY:
9540 case -NFS4ERR_WRONG_CRED: /* What to do here? */
9542 case -NFS4ERR_DELAY:
9543 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9545 case -NFS4ERR_RETRY_UNCACHED_REP:
9547 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n",
9548 __func__, task->tk_status, clp->cl_hostname);
9550 case -NFS4ERR_BADSESSION:
9551 case -NFS4ERR_DEADSESSION:
9552 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9555 nfs4_schedule_lease_recovery(clp);
9560 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9562 struct nfs4_reclaim_complete_data *calldata = data;
9563 struct nfs_client *clp = calldata->clp;
9564 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9566 if (!nfs41_sequence_done(task, res))
9569 trace_nfs4_reclaim_complete(clp, task->tk_status);
9570 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9571 rpc_restart_call_prepare(task);
9576 static void nfs4_free_reclaim_complete_data(void *data)
9578 struct nfs4_reclaim_complete_data *calldata = data;
9583 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9584 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9585 .rpc_call_done = nfs4_reclaim_complete_done,
9586 .rpc_release = nfs4_free_reclaim_complete_data,
9590 * Issue a global reclaim complete.
9592 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
9593 const struct cred *cred)
9595 struct nfs4_reclaim_complete_data *calldata;
9596 struct rpc_message msg = {
9597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
9600 struct rpc_task_setup task_setup_data = {
9601 .rpc_client = clp->cl_rpcclient,
9602 .rpc_message = &msg,
9603 .callback_ops = &nfs4_reclaim_complete_call_ops,
9604 .flags = RPC_TASK_NO_ROUND_ROBIN,
9606 int status = -ENOMEM;
9608 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9609 if (calldata == NULL)
9611 calldata->clp = clp;
9612 calldata->arg.one_fs = 0;
9614 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
9615 msg.rpc_argp = &calldata->arg;
9616 msg.rpc_resp = &calldata->res;
9617 task_setup_data.callback_data = calldata;
9618 status = nfs4_call_sync_custom(&task_setup_data);
9620 dprintk("<-- %s status=%d\n", __func__, status);
9625 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9627 struct nfs4_layoutget *lgp = calldata;
9628 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
9630 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
9631 &lgp->res.seq_res, task);
9634 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9636 struct nfs4_layoutget *lgp = calldata;
9638 nfs41_sequence_process(task, &lgp->res.seq_res);
9642 nfs4_layoutget_handle_exception(struct rpc_task *task,
9643 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9645 struct inode *inode = lgp->args.inode;
9646 struct nfs_server *server = NFS_SERVER(inode);
9647 struct pnfs_layout_hdr *lo = lgp->lo;
9648 int nfs4err = task->tk_status;
9649 int err, status = 0;
9652 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
9654 nfs4_sequence_free_slot(&lgp->res.seq_res);
9656 exception->state = NULL;
9657 exception->stateid = NULL;
9664 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9665 * on the file. set tk_status to -ENODATA to tell upper layer to
9668 case -NFS4ERR_LAYOUTUNAVAILABLE:
9672 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9673 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9675 case -NFS4ERR_BADLAYOUT:
9676 status = -EOVERFLOW;
9679 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
9680 * (or clients) writing to the same RAID stripe except when
9681 * the minlength argument is 0 (see RFC5661 section 18.43.3).
9683 * Treat it like we would RECALLCONFLICT -- we retry for a little
9684 * while, and then eventually give up.
9686 case -NFS4ERR_LAYOUTTRYLATER:
9687 if (lgp->args.minlength == 0) {
9688 status = -EOVERFLOW;
9693 case -NFS4ERR_RECALLCONFLICT:
9694 status = -ERECALLCONFLICT;
9696 case -NFS4ERR_DELEG_REVOKED:
9697 case -NFS4ERR_ADMIN_REVOKED:
9698 case -NFS4ERR_EXPIRED:
9699 case -NFS4ERR_BAD_STATEID:
9700 exception->timeout = 0;
9701 spin_lock(&inode->i_lock);
9702 /* If the open stateid was bad, then recover it. */
9703 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
9704 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
9705 spin_unlock(&inode->i_lock);
9706 exception->state = lgp->args.ctx->state;
9707 exception->stateid = &lgp->args.stateid;
9712 * Mark the bad layout state as invalid, then retry
9714 pnfs_mark_layout_stateid_invalid(lo, &head);
9715 spin_unlock(&inode->i_lock);
9716 nfs_commit_inode(inode, 0);
9717 pnfs_free_lseg_list(&head);
9722 err = nfs4_handle_exception(server, nfs4err, exception);
9724 if (exception->retry)
9733 size_t max_response_pages(struct nfs_server *server)
9735 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9736 return nfs_page_array_len(0, max_resp_sz);
9739 static void nfs4_layoutget_release(void *calldata)
9741 struct nfs4_layoutget *lgp = calldata;
9743 nfs4_sequence_free_slot(&lgp->res.seq_res);
9744 pnfs_layoutget_free(lgp);
9747 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9748 .rpc_call_prepare = nfs4_layoutget_prepare,
9749 .rpc_call_done = nfs4_layoutget_done,
9750 .rpc_release = nfs4_layoutget_release,
9753 struct pnfs_layout_segment *
9754 nfs4_proc_layoutget(struct nfs4_layoutget *lgp,
9755 struct nfs4_exception *exception)
9757 struct inode *inode = lgp->args.inode;
9758 struct nfs_server *server = NFS_SERVER(inode);
9759 struct rpc_task *task;
9760 struct rpc_message msg = {
9761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9762 .rpc_argp = &lgp->args,
9763 .rpc_resp = &lgp->res,
9764 .rpc_cred = lgp->cred,
9766 struct rpc_task_setup task_setup_data = {
9767 .rpc_client = server->client,
9768 .rpc_message = &msg,
9769 .callback_ops = &nfs4_layoutget_call_ops,
9770 .callback_data = lgp,
9771 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF |
9774 struct pnfs_layout_segment *lseg = NULL;
9777 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
9778 exception->retry = 0;
9780 task = rpc_run_task(&task_setup_data);
9782 return ERR_CAST(task);
9784 status = rpc_wait_for_completion_task(task);
9788 if (task->tk_status < 0) {
9789 exception->retry = 1;
9790 status = nfs4_layoutget_handle_exception(task, lgp, exception);
9791 } else if (lgp->res.layoutp->len == 0) {
9792 exception->retry = 1;
9794 nfs4_update_delay(&exception->timeout);
9796 lseg = pnfs_layout_process(lgp);
9798 trace_nfs4_layoutget(lgp->args.ctx,
9805 dprintk("<-- %s status=%d\n", __func__, status);
9807 return ERR_PTR(status);
9812 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9814 struct nfs4_layoutreturn *lrp = calldata;
9816 nfs4_setup_sequence(lrp->clp,
9817 &lrp->args.seq_args,
9820 if (!pnfs_layout_is_valid(lrp->args.layout))
9824 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9826 struct nfs4_layoutreturn *lrp = calldata;
9827 struct nfs_server *server;
9829 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
9833 * Was there an RPC level error? Assume the call succeeded,
9834 * and that we need to release the layout
9836 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9837 lrp->res.lrs_present = 0;
9841 server = NFS_SERVER(lrp->args.inode);
9842 switch (task->tk_status) {
9843 case -NFS4ERR_OLD_STATEID:
9844 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
9850 task->tk_status = 0;
9854 case -NFS4ERR_DELAY:
9855 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
9861 task->tk_status = 0;
9862 nfs4_sequence_free_slot(&lrp->res.seq_res);
9863 rpc_restart_call_prepare(task);
9866 static void nfs4_layoutreturn_release(void *calldata)
9868 struct nfs4_layoutreturn *lrp = calldata;
9869 struct pnfs_layout_hdr *lo = lrp->args.layout;
9871 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
9872 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
9873 nfs4_sequence_free_slot(&lrp->res.seq_res);
9874 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9875 lrp->ld_private.ops->free(&lrp->ld_private);
9876 pnfs_put_layout_hdr(lrp->args.layout);
9877 nfs_iput_and_deactive(lrp->inode);
9878 put_cred(lrp->cred);
9882 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9883 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9884 .rpc_call_done = nfs4_layoutreturn_done,
9885 .rpc_release = nfs4_layoutreturn_release,
9888 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
9890 struct rpc_task *task;
9891 struct rpc_message msg = {
9892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9893 .rpc_argp = &lrp->args,
9894 .rpc_resp = &lrp->res,
9895 .rpc_cred = lrp->cred,
9897 struct rpc_task_setup task_setup_data = {
9898 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
9899 .rpc_message = &msg,
9900 .callback_ops = &nfs4_layoutreturn_call_ops,
9901 .callback_data = lrp,
9902 .flags = RPC_TASK_MOVEABLE,
9906 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9907 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9908 &task_setup_data.rpc_client, &msg);
9910 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9913 nfs4_layoutreturn_release(lrp);
9916 task_setup_data.flags |= RPC_TASK_ASYNC;
9919 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9922 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9924 task = rpc_run_task(&task_setup_data);
9926 return PTR_ERR(task);
9928 status = task->tk_status;
9929 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
9930 dprintk("<-- %s status=%d\n", __func__, status);
9936 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
9937 struct pnfs_device *pdev,
9938 const struct cred *cred)
9940 struct nfs4_getdeviceinfo_args args = {
9942 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9943 NOTIFY_DEVICEID4_DELETE,
9945 struct nfs4_getdeviceinfo_res res = {
9948 struct rpc_message msg = {
9949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9956 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
9957 if (res.notification & ~args.notify_types)
9958 dprintk("%s: unsupported notification\n", __func__);
9959 if (res.notification != args.notify_types)
9962 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status);
9964 dprintk("<-- %s status=%d\n", __func__, status);
9969 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9970 struct pnfs_device *pdev,
9971 const struct cred *cred)
9973 struct nfs4_exception exception = { };
9977 err = nfs4_handle_exception(server,
9978 _nfs4_proc_getdeviceinfo(server, pdev, cred),
9980 } while (exception.retry);
9983 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9985 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9987 struct nfs4_layoutcommit_data *data = calldata;
9988 struct nfs_server *server = NFS_SERVER(data->args.inode);
9990 nfs4_setup_sequence(server->nfs_client,
9991 &data->args.seq_args,
9997 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9999 struct nfs4_layoutcommit_data *data = calldata;
10000 struct nfs_server *server = NFS_SERVER(data->args.inode);
10002 if (!nfs41_sequence_done(task, &data->res.seq_res))
10005 switch (task->tk_status) { /* Just ignore these failures */
10006 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
10007 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
10008 case -NFS4ERR_BADLAYOUT: /* no layout */
10009 case -NFS4ERR_GRACE: /* loca_recalim always false */
10010 task->tk_status = 0;
10015 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
10016 rpc_restart_call_prepare(task);
10022 static void nfs4_layoutcommit_release(void *calldata)
10024 struct nfs4_layoutcommit_data *data = calldata;
10026 pnfs_cleanup_layoutcommit(data);
10027 nfs_post_op_update_inode_force_wcc(data->args.inode,
10029 put_cred(data->cred);
10030 nfs_iput_and_deactive(data->inode);
10034 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
10035 .rpc_call_prepare = nfs4_layoutcommit_prepare,
10036 .rpc_call_done = nfs4_layoutcommit_done,
10037 .rpc_release = nfs4_layoutcommit_release,
10041 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
10043 struct rpc_message msg = {
10044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
10045 .rpc_argp = &data->args,
10046 .rpc_resp = &data->res,
10047 .rpc_cred = data->cred,
10049 struct rpc_task_setup task_setup_data = {
10050 .task = &data->task,
10051 .rpc_client = NFS_CLIENT(data->args.inode),
10052 .rpc_message = &msg,
10053 .callback_ops = &nfs4_layoutcommit_ops,
10054 .callback_data = data,
10055 .flags = RPC_TASK_MOVEABLE,
10057 struct rpc_task *task;
10060 dprintk("NFS: initiating layoutcommit call. sync %d "
10061 "lbw: %llu inode %lu\n", sync,
10062 data->args.lastbytewritten,
10063 data->args.inode->i_ino);
10066 data->inode = nfs_igrab_and_active(data->args.inode);
10067 if (data->inode == NULL) {
10068 nfs4_layoutcommit_release(data);
10071 task_setup_data.flags = RPC_TASK_ASYNC;
10073 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
10074 task = rpc_run_task(&task_setup_data);
10076 return PTR_ERR(task);
10078 status = task->tk_status;
10079 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
10080 dprintk("%s: status %d\n", __func__, status);
10081 rpc_put_task(task);
10086 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
10087 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
10090 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
10091 struct nfs_fsinfo *info,
10092 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
10094 struct nfs41_secinfo_no_name_args args = {
10095 .style = SECINFO_STYLE_CURRENT_FH,
10097 struct nfs4_secinfo_res res = {
10098 .flavors = flavors,
10100 struct rpc_message msg = {
10101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
10105 struct nfs4_call_sync_data data = {
10106 .seq_server = server,
10107 .seq_args = &args.seq_args,
10108 .seq_res = &res.seq_res,
10110 struct rpc_task_setup task_setup = {
10111 .rpc_client = server->client,
10112 .rpc_message = &msg,
10113 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
10114 .callback_data = &data,
10115 .flags = RPC_TASK_NO_ROUND_ROBIN,
10117 const struct cred *cred = NULL;
10120 if (use_integrity) {
10121 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
10123 cred = nfs4_get_clid_cred(server->nfs_client);
10124 msg.rpc_cred = cred;
10127 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
10128 status = nfs4_call_sync_custom(&task_setup);
10129 dprintk("<-- %s status=%d\n", __func__, status);
10137 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
10138 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
10140 struct nfs4_exception exception = {
10141 .interruptible = true,
10145 /* first try using integrity protection */
10146 err = -NFS4ERR_WRONGSEC;
10148 /* try to use integrity protection with machine cred */
10149 if (_nfs4_is_integrity_protected(server->nfs_client))
10150 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10154 * if unable to use integrity protection, or SECINFO with
10155 * integrity protection returns NFS4ERR_WRONGSEC (which is
10156 * disallowed by spec, but exists in deployed servers) use
10157 * the current filesystem's rpc_client and the user cred.
10159 if (err == -NFS4ERR_WRONGSEC)
10160 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10165 case -NFS4ERR_WRONGSEC:
10169 err = nfs4_handle_exception(server, err, &exception);
10171 } while (exception.retry);
10177 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
10178 struct nfs_fsinfo *info)
10182 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
10183 struct nfs4_secinfo_flavors *flavors;
10184 struct nfs4_secinfo4 *secinfo;
10187 page = alloc_page(GFP_KERNEL);
10193 flavors = page_address(page);
10194 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
10197 * Fall back on "guess and check" method if
10198 * the server doesn't support SECINFO_NO_NAME
10200 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
10201 err = nfs4_find_root_sec(server, fhandle, info);
10207 for (i = 0; i < flavors->num_flavors; i++) {
10208 secinfo = &flavors->flavors[i];
10210 switch (secinfo->flavor) {
10211 case RPC_AUTH_NULL:
10212 case RPC_AUTH_UNIX:
10214 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
10215 &secinfo->flavor_info);
10218 flavor = RPC_AUTH_MAXFLAVOR;
10222 if (!nfs_auth_info_match(&server->auth_info, flavor))
10223 flavor = RPC_AUTH_MAXFLAVOR;
10225 if (flavor != RPC_AUTH_MAXFLAVOR) {
10226 err = nfs4_lookup_root_sec(server, fhandle,
10233 if (flavor == RPC_AUTH_MAXFLAVOR)
10238 if (err == -EACCES)
10244 static int _nfs41_test_stateid(struct nfs_server *server,
10245 nfs4_stateid *stateid,
10246 const struct cred *cred)
10249 struct nfs41_test_stateid_args args = {
10250 .stateid = stateid,
10252 struct nfs41_test_stateid_res res;
10253 struct rpc_message msg = {
10254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
10259 struct rpc_clnt *rpc_client = server->client;
10261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10262 &rpc_client, &msg);
10264 dprintk("NFS call test_stateid %p\n", stateid);
10265 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
10266 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
10267 &args.seq_args, &res.seq_res);
10268 if (status != NFS_OK) {
10269 dprintk("NFS reply test_stateid: failed, %d\n", status);
10272 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
10273 return -res.status;
10276 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
10277 int err, struct nfs4_exception *exception)
10279 exception->retry = 0;
10281 case -NFS4ERR_DELAY:
10282 case -NFS4ERR_RETRY_UNCACHED_REP:
10283 nfs4_handle_exception(server, err, exception);
10285 case -NFS4ERR_BADSESSION:
10286 case -NFS4ERR_BADSLOT:
10287 case -NFS4ERR_BAD_HIGH_SLOT:
10288 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
10289 case -NFS4ERR_DEADSESSION:
10290 nfs4_do_handle_exception(server, err, exception);
10295 * nfs41_test_stateid - perform a TEST_STATEID operation
10297 * @server: server / transport on which to perform the operation
10298 * @stateid: state ID to test
10299 * @cred: credential
10301 * Returns NFS_OK if the server recognizes that "stateid" is valid.
10302 * Otherwise a negative NFS4ERR value is returned if the operation
10303 * failed or the state ID is not currently valid.
10305 static int nfs41_test_stateid(struct nfs_server *server,
10306 nfs4_stateid *stateid,
10307 const struct cred *cred)
10309 struct nfs4_exception exception = {
10310 .interruptible = true,
10314 err = _nfs41_test_stateid(server, stateid, cred);
10315 nfs4_handle_delay_or_session_error(server, err, &exception);
10316 } while (exception.retry);
10320 struct nfs_free_stateid_data {
10321 struct nfs_server *server;
10322 struct nfs41_free_stateid_args args;
10323 struct nfs41_free_stateid_res res;
10326 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10328 struct nfs_free_stateid_data *data = calldata;
10329 nfs4_setup_sequence(data->server->nfs_client,
10330 &data->args.seq_args,
10331 &data->res.seq_res,
10335 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10337 struct nfs_free_stateid_data *data = calldata;
10339 nfs41_sequence_done(task, &data->res.seq_res);
10341 switch (task->tk_status) {
10342 case -NFS4ERR_DELAY:
10343 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
10344 rpc_restart_call_prepare(task);
10348 static void nfs41_free_stateid_release(void *calldata)
10350 struct nfs_free_stateid_data *data = calldata;
10351 struct nfs_client *clp = data->server->nfs_client;
10353 nfs_put_client(clp);
10357 static const struct rpc_call_ops nfs41_free_stateid_ops = {
10358 .rpc_call_prepare = nfs41_free_stateid_prepare,
10359 .rpc_call_done = nfs41_free_stateid_done,
10360 .rpc_release = nfs41_free_stateid_release,
10364 * nfs41_free_stateid - perform a FREE_STATEID operation
10366 * @server: server / transport on which to perform the operation
10367 * @stateid: state ID to release
10368 * @cred: credential
10369 * @privileged: set to true if this call needs to be privileged
10371 * Note: this function is always asynchronous.
10373 static int nfs41_free_stateid(struct nfs_server *server,
10374 const nfs4_stateid *stateid,
10375 const struct cred *cred,
10378 struct rpc_message msg = {
10379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
10382 struct rpc_task_setup task_setup = {
10383 .rpc_client = server->client,
10384 .rpc_message = &msg,
10385 .callback_ops = &nfs41_free_stateid_ops,
10386 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
10388 struct nfs_free_stateid_data *data;
10389 struct rpc_task *task;
10390 struct nfs_client *clp = server->nfs_client;
10392 if (!refcount_inc_not_zero(&clp->cl_count))
10395 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10396 &task_setup.rpc_client, &msg);
10398 dprintk("NFS call free_stateid %p\n", stateid);
10399 data = kmalloc(sizeof(*data), GFP_KERNEL);
10402 data->server = server;
10403 nfs4_stateid_copy(&data->args.stateid, stateid);
10405 task_setup.callback_data = data;
10407 msg.rpc_argp = &data->args;
10408 msg.rpc_resp = &data->res;
10409 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
10410 task = rpc_run_task(&task_setup);
10412 return PTR_ERR(task);
10413 rpc_put_task(task);
10418 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
10420 const struct cred *cred = lsp->ls_state->owner->so_cred;
10422 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
10423 nfs4_free_lock_state(server, lsp);
10426 static bool nfs41_match_stateid(const nfs4_stateid *s1,
10427 const nfs4_stateid *s2)
10429 if (s1->type != s2->type)
10432 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
10435 if (s1->seqid == s2->seqid)
10438 return s1->seqid == 0 || s2->seqid == 0;
10441 #endif /* CONFIG_NFS_V4_1 */
10443 static bool nfs4_match_stateid(const nfs4_stateid *s1,
10444 const nfs4_stateid *s2)
10446 return nfs4_stateid_match(s1, s2);
10450 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
10451 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10452 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10453 .recover_open = nfs4_open_reclaim,
10454 .recover_lock = nfs4_lock_reclaim,
10455 .establish_clid = nfs4_init_clientid,
10456 .detect_trunking = nfs40_discover_server_trunking,
10459 #if defined(CONFIG_NFS_V4_1)
10460 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
10461 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10462 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10463 .recover_open = nfs4_open_reclaim,
10464 .recover_lock = nfs4_lock_reclaim,
10465 .establish_clid = nfs41_init_clientid,
10466 .reclaim_complete = nfs41_proc_reclaim_complete,
10467 .detect_trunking = nfs41_discover_server_trunking,
10469 #endif /* CONFIG_NFS_V4_1 */
10471 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
10472 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10473 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
10474 .recover_open = nfs40_open_expired,
10475 .recover_lock = nfs4_lock_expired,
10476 .establish_clid = nfs4_init_clientid,
10479 #if defined(CONFIG_NFS_V4_1)
10480 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
10481 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10482 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
10483 .recover_open = nfs41_open_expired,
10484 .recover_lock = nfs41_lock_expired,
10485 .establish_clid = nfs41_init_clientid,
10487 #endif /* CONFIG_NFS_V4_1 */
10489 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
10490 .sched_state_renewal = nfs4_proc_async_renew,
10491 .get_state_renewal_cred = nfs4_get_renew_cred,
10492 .renew_lease = nfs4_proc_renew,
10495 #if defined(CONFIG_NFS_V4_1)
10496 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
10497 .sched_state_renewal = nfs41_proc_async_sequence,
10498 .get_state_renewal_cred = nfs4_get_machine_cred,
10499 .renew_lease = nfs4_proc_sequence,
10503 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
10504 .get_locations = _nfs40_proc_get_locations,
10505 .fsid_present = _nfs40_proc_fsid_present,
10508 #if defined(CONFIG_NFS_V4_1)
10509 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
10510 .get_locations = _nfs41_proc_get_locations,
10511 .fsid_present = _nfs41_proc_fsid_present,
10513 #endif /* CONFIG_NFS_V4_1 */
10515 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10516 .minor_version = 0,
10517 .init_caps = NFS_CAP_READDIRPLUS
10518 | NFS_CAP_ATOMIC_OPEN
10519 | NFS_CAP_POSIX_LOCK,
10520 .init_client = nfs40_init_client,
10521 .shutdown_client = nfs40_shutdown_client,
10522 .match_stateid = nfs4_match_stateid,
10523 .find_root_sec = nfs4_find_root_sec,
10524 .free_lock_state = nfs4_release_lockowner,
10525 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
10526 .alloc_seqid = nfs_alloc_seqid,
10527 .call_sync_ops = &nfs40_call_sync_ops,
10528 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10529 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10530 .state_renewal_ops = &nfs40_state_renewal_ops,
10531 .mig_recovery_ops = &nfs40_mig_recovery_ops,
10534 #if defined(CONFIG_NFS_V4_1)
10535 static struct nfs_seqid *
10536 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10541 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10542 .minor_version = 1,
10543 .init_caps = NFS_CAP_READDIRPLUS
10544 | NFS_CAP_ATOMIC_OPEN
10545 | NFS_CAP_POSIX_LOCK
10546 | NFS_CAP_STATEID_NFSV41
10547 | NFS_CAP_ATOMIC_OPEN_V1
10549 | NFS_CAP_MOVEABLE,
10550 .init_client = nfs41_init_client,
10551 .shutdown_client = nfs41_shutdown_client,
10552 .match_stateid = nfs41_match_stateid,
10553 .find_root_sec = nfs41_find_root_sec,
10554 .free_lock_state = nfs41_free_lock_state,
10555 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
10556 .alloc_seqid = nfs_alloc_no_seqid,
10557 .session_trunk = nfs4_test_session_trunk,
10558 .call_sync_ops = &nfs41_call_sync_ops,
10559 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10560 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10561 .state_renewal_ops = &nfs41_state_renewal_ops,
10562 .mig_recovery_ops = &nfs41_mig_recovery_ops,
10566 #if defined(CONFIG_NFS_V4_2)
10567 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10568 .minor_version = 2,
10569 .init_caps = NFS_CAP_READDIRPLUS
10570 | NFS_CAP_ATOMIC_OPEN
10571 | NFS_CAP_POSIX_LOCK
10572 | NFS_CAP_STATEID_NFSV41
10573 | NFS_CAP_ATOMIC_OPEN_V1
10577 | NFS_CAP_OFFLOAD_CANCEL
10578 | NFS_CAP_COPY_NOTIFY
10579 | NFS_CAP_DEALLOCATE
10581 | NFS_CAP_LAYOUTSTATS
10583 | NFS_CAP_LAYOUTERROR
10584 | NFS_CAP_READ_PLUS
10585 | NFS_CAP_MOVEABLE,
10586 .init_client = nfs41_init_client,
10587 .shutdown_client = nfs41_shutdown_client,
10588 .match_stateid = nfs41_match_stateid,
10589 .find_root_sec = nfs41_find_root_sec,
10590 .free_lock_state = nfs41_free_lock_state,
10591 .call_sync_ops = &nfs41_call_sync_ops,
10592 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
10593 .alloc_seqid = nfs_alloc_no_seqid,
10594 .session_trunk = nfs4_test_session_trunk,
10595 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10596 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10597 .state_renewal_ops = &nfs41_state_renewal_ops,
10598 .mig_recovery_ops = &nfs41_mig_recovery_ops,
10602 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10603 [0] = &nfs_v4_0_minor_ops,
10604 #if defined(CONFIG_NFS_V4_1)
10605 [1] = &nfs_v4_1_minor_ops,
10607 #if defined(CONFIG_NFS_V4_2)
10608 [2] = &nfs_v4_2_minor_ops,
10612 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
10614 ssize_t error, error2, error3;
10616 error = generic_listxattr(dentry, list, size);
10624 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10633 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size);
10637 return error + error2 + error3;
10640 static void nfs4_enable_swap(struct inode *inode)
10642 /* The state manager thread must always be running.
10643 * It will notice the client is a swapper, and stay put.
10645 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
10647 nfs4_schedule_state_manager(clp);
10650 static void nfs4_disable_swap(struct inode *inode)
10652 /* The state manager thread will now exit once it is
10655 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
10657 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);
10658 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state);
10659 wake_up_var(&clp->cl_state);
10662 static const struct inode_operations nfs4_dir_inode_operations = {
10663 .create = nfs_create,
10664 .lookup = nfs_lookup,
10665 .atomic_open = nfs_atomic_open,
10667 .unlink = nfs_unlink,
10668 .symlink = nfs_symlink,
10669 .mkdir = nfs_mkdir,
10670 .rmdir = nfs_rmdir,
10671 .mknod = nfs_mknod,
10672 .rename = nfs_rename,
10673 .permission = nfs_permission,
10674 .getattr = nfs_getattr,
10675 .setattr = nfs_setattr,
10676 .listxattr = nfs4_listxattr,
10679 static const struct inode_operations nfs4_file_inode_operations = {
10680 .permission = nfs_permission,
10681 .getattr = nfs_getattr,
10682 .setattr = nfs_setattr,
10683 .listxattr = nfs4_listxattr,
10686 const struct nfs_rpc_ops nfs_v4_clientops = {
10687 .version = 4, /* protocol version */
10688 .dentry_ops = &nfs4_dentry_operations,
10689 .dir_inode_ops = &nfs4_dir_inode_operations,
10690 .file_inode_ops = &nfs4_file_inode_operations,
10691 .file_ops = &nfs4_file_operations,
10692 .getroot = nfs4_proc_get_root,
10693 .submount = nfs4_submount,
10694 .try_get_tree = nfs4_try_get_tree,
10695 .getattr = nfs4_proc_getattr,
10696 .setattr = nfs4_proc_setattr,
10697 .lookup = nfs4_proc_lookup,
10698 .lookupp = nfs4_proc_lookupp,
10699 .access = nfs4_proc_access,
10700 .readlink = nfs4_proc_readlink,
10701 .create = nfs4_proc_create,
10702 .remove = nfs4_proc_remove,
10703 .unlink_setup = nfs4_proc_unlink_setup,
10704 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
10705 .unlink_done = nfs4_proc_unlink_done,
10706 .rename_setup = nfs4_proc_rename_setup,
10707 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
10708 .rename_done = nfs4_proc_rename_done,
10709 .link = nfs4_proc_link,
10710 .symlink = nfs4_proc_symlink,
10711 .mkdir = nfs4_proc_mkdir,
10712 .rmdir = nfs4_proc_rmdir,
10713 .readdir = nfs4_proc_readdir,
10714 .mknod = nfs4_proc_mknod,
10715 .statfs = nfs4_proc_statfs,
10716 .fsinfo = nfs4_proc_fsinfo,
10717 .pathconf = nfs4_proc_pathconf,
10718 .set_capabilities = nfs4_server_capabilities,
10719 .decode_dirent = nfs4_decode_dirent,
10720 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
10721 .read_setup = nfs4_proc_read_setup,
10722 .read_done = nfs4_read_done,
10723 .write_setup = nfs4_proc_write_setup,
10724 .write_done = nfs4_write_done,
10725 .commit_setup = nfs4_proc_commit_setup,
10726 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
10727 .commit_done = nfs4_commit_done,
10728 .lock = nfs4_proc_lock,
10729 .clear_acl_cache = nfs4_zap_acl_attr,
10730 .close_context = nfs4_close_context,
10731 .open_context = nfs4_atomic_open,
10732 .have_delegation = nfs4_have_delegation,
10733 .alloc_client = nfs4_alloc_client,
10734 .init_client = nfs4_init_client,
10735 .free_client = nfs4_free_client,
10736 .create_server = nfs4_create_server,
10737 .clone_server = nfs_clone_server,
10738 .discover_trunking = nfs4_discover_trunking,
10739 .enable_swap = nfs4_enable_swap,
10740 .disable_swap = nfs4_disable_swap,
10743 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
10744 .name = XATTR_NAME_NFSV4_ACL,
10745 .list = nfs4_xattr_list_nfs4_acl,
10746 .get = nfs4_xattr_get_nfs4_acl,
10747 .set = nfs4_xattr_set_nfs4_acl,
10750 #if defined(CONFIG_NFS_V4_1)
10751 static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = {
10752 .name = XATTR_NAME_NFSV4_DACL,
10753 .list = nfs4_xattr_list_nfs4_dacl,
10754 .get = nfs4_xattr_get_nfs4_dacl,
10755 .set = nfs4_xattr_set_nfs4_dacl,
10758 static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = {
10759 .name = XATTR_NAME_NFSV4_SACL,
10760 .list = nfs4_xattr_list_nfs4_sacl,
10761 .get = nfs4_xattr_get_nfs4_sacl,
10762 .set = nfs4_xattr_set_nfs4_sacl,
10766 #ifdef CONFIG_NFS_V4_2
10767 static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10768 .prefix = XATTR_USER_PREFIX,
10769 .get = nfs4_xattr_get_nfs4_user,
10770 .set = nfs4_xattr_set_nfs4_user,
10774 const struct xattr_handler * const nfs4_xattr_handlers[] = {
10775 &nfs4_xattr_nfs4_acl_handler,
10776 #if defined(CONFIG_NFS_V4_1)
10777 &nfs4_xattr_nfs4_dacl_handler,
10778 &nfs4_xattr_nfs4_sacl_handler,
10780 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
10781 &nfs4_xattr_nfs4_label_handler,
10783 #ifdef CONFIG_NFS_V4_2
10784 &nfs4_xattr_nfs4_user_handler,