4 * Client-side XDR for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its
21 * contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * Implementation of the NFSv4 state model. For the time being,
37 * this is minimal, but will be made much more complex in a
41 #include <linux/config.h>
42 #include <linux/slab.h>
43 #include <linux/smp_lock.h>
44 #include <linux/nfs_fs.h>
45 #include <linux/nfs_idmap.h>
46 #include <linux/workqueue.h>
47 #include <linux/bitops.h>
50 #include "delegation.h"
52 #define OPENOWNER_POOL_SIZE 8
54 static spinlock_t state_spinlock = SPIN_LOCK_UNLOCKED;
56 nfs4_stateid zero_stateid;
59 nfs4_stateid one_stateid =
60 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
63 static LIST_HEAD(nfs4_clientid_list);
65 static void nfs4_recover_state(void *);
66 extern void nfs4_renew_state(void *);
69 init_nfsv4_state(struct nfs_server *server)
71 server->nfs4_state = NULL;
72 INIT_LIST_HEAD(&server->nfs4_siblings);
76 destroy_nfsv4_state(struct nfs_server *server)
78 if (server->mnt_path) {
79 kfree(server->mnt_path);
80 server->mnt_path = NULL;
82 if (server->nfs4_state) {
83 nfs4_put_client(server->nfs4_state);
84 server->nfs4_state = NULL;
89 * nfs4_get_client(): returns an empty client structure
90 * nfs4_put_client(): drops reference to client structure
92 * Since these are allocated/deallocated very rarely, we don't
93 * bother putting them in a slab cache...
95 static struct nfs4_client *
96 nfs4_alloc_client(struct in_addr *addr)
98 struct nfs4_client *clp;
100 if (nfs_callback_up() < 0)
102 if ((clp = kmalloc(sizeof(*clp), GFP_KERNEL)) == NULL) {
106 memset(clp, 0, sizeof(*clp));
107 memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr));
108 init_rwsem(&clp->cl_sem);
109 INIT_LIST_HEAD(&clp->cl_delegations);
110 INIT_LIST_HEAD(&clp->cl_state_owners);
111 INIT_LIST_HEAD(&clp->cl_unused);
112 spin_lock_init(&clp->cl_lock);
113 atomic_set(&clp->cl_count, 1);
114 INIT_WORK(&clp->cl_recoverd, nfs4_recover_state, clp);
115 INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
116 INIT_LIST_HEAD(&clp->cl_superblocks);
117 init_waitqueue_head(&clp->cl_waitq);
118 rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
119 clp->cl_state = 1 << NFS4CLNT_OK;
124 nfs4_free_client(struct nfs4_client *clp)
126 struct nfs4_state_owner *sp;
128 while (!list_empty(&clp->cl_unused)) {
129 sp = list_entry(clp->cl_unused.next,
130 struct nfs4_state_owner,
132 list_del(&sp->so_list);
135 BUG_ON(!list_empty(&clp->cl_state_owners));
137 put_rpccred(clp->cl_cred);
138 nfs_idmap_delete(clp);
139 if (clp->cl_rpcclient)
140 rpc_shutdown_client(clp->cl_rpcclient);
145 static struct nfs4_client *__nfs4_find_client(struct in_addr *addr)
147 struct nfs4_client *clp;
148 list_for_each_entry(clp, &nfs4_clientid_list, cl_servers) {
149 if (memcmp(&clp->cl_addr, addr, sizeof(clp->cl_addr)) == 0) {
150 atomic_inc(&clp->cl_count);
157 struct nfs4_client *nfs4_find_client(struct in_addr *addr)
159 struct nfs4_client *clp;
160 spin_lock(&state_spinlock);
161 clp = __nfs4_find_client(addr);
162 spin_unlock(&state_spinlock);
167 nfs4_get_client(struct in_addr *addr)
169 struct nfs4_client *clp, *new = NULL;
171 spin_lock(&state_spinlock);
173 clp = __nfs4_find_client(addr);
178 list_add(&clp->cl_servers, &nfs4_clientid_list);
182 spin_unlock(&state_spinlock);
183 new = nfs4_alloc_client(addr);
184 spin_lock(&state_spinlock);
188 spin_unlock(&state_spinlock);
190 nfs4_free_client(new);
195 nfs4_put_client(struct nfs4_client *clp)
197 if (!atomic_dec_and_lock(&clp->cl_count, &state_spinlock))
199 list_del(&clp->cl_servers);
200 spin_unlock(&state_spinlock);
201 BUG_ON(!list_empty(&clp->cl_superblocks));
202 wake_up_all(&clp->cl_waitq);
203 rpc_wake_up(&clp->cl_rpcwaitq);
204 nfs4_kill_renewd(clp);
205 nfs4_free_client(clp);
208 int nfs4_init_client(struct nfs4_client *clp)
210 int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, nfs_callback_tcpport);
212 status = nfs4_proc_setclientid_confirm(clp);
214 nfs4_schedule_state_renewal(clp);
219 nfs4_alloc_lockowner_id(struct nfs4_client *clp)
221 return clp->cl_lockowner_id ++;
224 static struct nfs4_state_owner *
225 nfs4_client_grab_unused(struct nfs4_client *clp, struct rpc_cred *cred)
227 struct nfs4_state_owner *sp = NULL;
229 if (!list_empty(&clp->cl_unused)) {
230 sp = list_entry(clp->cl_unused.next, struct nfs4_state_owner, so_list);
231 atomic_inc(&sp->so_count);
233 list_move(&sp->so_list, &clp->cl_state_owners);
239 static struct nfs4_state_owner *
240 nfs4_find_state_owner(struct nfs4_client *clp, struct rpc_cred *cred)
242 struct nfs4_state_owner *sp, *res = NULL;
244 list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
245 if (sp->so_cred != cred)
247 atomic_inc(&sp->so_count);
248 /* Move to the head of the list */
249 list_move(&sp->so_list, &clp->cl_state_owners);
257 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
258 * create a new state_owner.
261 static struct nfs4_state_owner *
262 nfs4_alloc_state_owner(void)
264 struct nfs4_state_owner *sp;
266 sp = kmalloc(sizeof(*sp),GFP_KERNEL);
269 init_MUTEX(&sp->so_sema);
270 sp->so_seqid = 0; /* arbitrary */
271 INIT_LIST_HEAD(&sp->so_states);
272 INIT_LIST_HEAD(&sp->so_delegations);
273 atomic_set(&sp->so_count, 1);
278 nfs4_unhash_state_owner(struct nfs4_state_owner *sp)
280 struct nfs4_client *clp = sp->so_client;
281 spin_lock(&clp->cl_lock);
282 list_del_init(&sp->so_list);
283 spin_unlock(&clp->cl_lock);
287 * Note: must be called with clp->cl_sem held in order to prevent races
288 * with reboot recovery!
290 struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred)
292 struct nfs4_client *clp = server->nfs4_state;
293 struct nfs4_state_owner *sp, *new;
296 new = nfs4_alloc_state_owner();
297 spin_lock(&clp->cl_lock);
298 sp = nfs4_find_state_owner(clp, cred);
300 sp = nfs4_client_grab_unused(clp, cred);
301 if (sp == NULL && new != NULL) {
302 list_add(&new->so_list, &clp->cl_state_owners);
303 new->so_client = clp;
304 new->so_id = nfs4_alloc_lockowner_id(clp);
309 spin_unlock(&clp->cl_lock);
319 * Must be called with clp->cl_sem held in order to avoid races
320 * with state recovery...
322 void nfs4_put_state_owner(struct nfs4_state_owner *sp)
324 struct nfs4_client *clp = sp->so_client;
325 struct rpc_cred *cred = sp->so_cred;
327 if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
329 if (clp->cl_nunused >= OPENOWNER_POOL_SIZE)
331 if (list_empty(&sp->so_list))
333 list_move(&sp->so_list, &clp->cl_unused);
335 spin_unlock(&clp->cl_lock);
340 list_del(&sp->so_list);
341 spin_unlock(&clp->cl_lock);
346 static struct nfs4_state *
347 nfs4_alloc_open_state(void)
349 struct nfs4_state *state;
351 state = kmalloc(sizeof(*state), GFP_KERNEL);
358 memset(state->stateid.data, 0, sizeof(state->stateid.data));
359 atomic_set(&state->count, 1);
360 INIT_LIST_HEAD(&state->lock_states);
361 init_MUTEX(&state->lock_sema);
362 rwlock_init(&state->state_lock);
366 static struct nfs4_state *
367 __nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
369 struct nfs_inode *nfsi = NFS_I(inode);
370 struct nfs4_state *state;
372 mode &= (FMODE_READ|FMODE_WRITE);
373 list_for_each_entry(state, &nfsi->open_states, inode_states) {
374 if (state->owner->so_cred != cred)
376 if ((mode & FMODE_READ) != 0 && state->nreaders == 0)
378 if ((mode & FMODE_WRITE) != 0 && state->nwriters == 0)
380 if ((state->state & mode) != mode)
382 atomic_inc(&state->count);
383 if (mode & FMODE_READ)
385 if (mode & FMODE_WRITE)
392 static struct nfs4_state *
393 __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner)
395 struct nfs_inode *nfsi = NFS_I(inode);
396 struct nfs4_state *state;
398 list_for_each_entry(state, &nfsi->open_states, inode_states) {
399 /* Is this in the process of being freed? */
400 if (state->nreaders == 0 && state->nwriters == 0)
402 if (state->owner == owner) {
403 atomic_inc(&state->count);
411 nfs4_find_state(struct inode *inode, struct rpc_cred *cred, mode_t mode)
413 struct nfs4_state *state;
415 spin_lock(&inode->i_lock);
416 state = __nfs4_find_state(inode, cred, mode);
417 spin_unlock(&inode->i_lock);
422 nfs4_free_open_state(struct nfs4_state *state)
428 nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner)
430 struct nfs4_state *state, *new;
431 struct nfs_inode *nfsi = NFS_I(inode);
433 spin_lock(&inode->i_lock);
434 state = __nfs4_find_state_byowner(inode, owner);
435 spin_unlock(&inode->i_lock);
438 new = nfs4_alloc_open_state();
439 spin_lock(&inode->i_lock);
440 state = __nfs4_find_state_byowner(inode, owner);
441 if (state == NULL && new != NULL) {
443 /* Caller *must* be holding owner->so_sem */
444 list_add(&state->open_states, &owner->so_states);
445 state->owner = owner;
446 atomic_inc(&owner->so_count);
447 list_add(&state->inode_states, &nfsi->open_states);
448 state->inode = inode;
449 spin_unlock(&inode->i_lock);
451 spin_unlock(&inode->i_lock);
453 nfs4_free_open_state(new);
460 * Beware! Caller must be holding exactly one
461 * reference to clp->cl_sem and owner->so_sema!
463 void nfs4_put_open_state(struct nfs4_state *state)
465 struct inode *inode = state->inode;
466 struct nfs4_state_owner *owner = state->owner;
468 if (!atomic_dec_and_lock(&state->count, &inode->i_lock))
470 if (!list_empty(&state->inode_states))
471 list_del(&state->inode_states);
472 spin_unlock(&inode->i_lock);
473 list_del(&state->open_states);
474 BUG_ON (state->state != 0);
475 nfs4_free_open_state(state);
476 nfs4_put_state_owner(owner);
480 * Beware! Caller must be holding no references to clp->cl_sem!
483 void nfs4_close_state(struct nfs4_state *state, mode_t mode)
485 struct inode *inode = state->inode;
486 struct nfs4_state_owner *owner = state->owner;
487 struct nfs4_client *clp = owner->so_client;
491 atomic_inc(&owner->so_count);
492 down_read(&clp->cl_sem);
493 down(&owner->so_sema);
494 /* Protect against nfs4_find_state() */
495 spin_lock(&inode->i_lock);
496 if (mode & FMODE_READ)
498 if (mode & FMODE_WRITE)
500 if (state->nwriters == 0 && state->nreaders == 0)
501 list_del_init(&state->inode_states);
502 spin_unlock(&inode->i_lock);
504 if (state->state != 0) {
506 newstate |= FMODE_READ;
508 newstate |= FMODE_WRITE;
509 if (state->state == newstate)
512 status = nfs4_do_downgrade(inode, state, newstate);
514 status = nfs4_do_close(inode, state);
517 nfs4_put_open_state(state);
519 nfs4_put_state_owner(owner);
520 up_read(&clp->cl_sem);
524 * Search the state->lock_states for an existing lock_owner
525 * that is compatible with current->files
527 static struct nfs4_lock_state *
528 __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
530 struct nfs4_lock_state *pos;
531 list_for_each_entry(pos, &state->lock_states, ls_locks) {
532 if (pos->ls_owner != fl_owner)
534 atomic_inc(&pos->ls_count);
540 struct nfs4_lock_state *
541 nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
543 struct nfs4_lock_state *lsp;
544 read_lock(&state->state_lock);
545 lsp = __nfs4_find_lock_state(state, fl_owner);
546 read_unlock(&state->state_lock);
551 * Return a compatible lock_state. If no initialized lock_state structure
552 * exists, return an uninitialized one.
554 * The caller must be holding state->lock_sema
556 static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
558 struct nfs4_lock_state *lsp;
559 struct nfs4_client *clp = state->owner->so_client;
561 lsp = kmalloc(sizeof(*lsp), GFP_KERNEL);
565 lsp->ls_seqid = 0; /* arbitrary */
567 memset(lsp->ls_stateid.data, 0, sizeof(lsp->ls_stateid.data));
568 atomic_set(&lsp->ls_count, 1);
569 lsp->ls_owner = fl_owner;
570 INIT_LIST_HEAD(&lsp->ls_locks);
571 spin_lock(&clp->cl_lock);
572 lsp->ls_id = nfs4_alloc_lockowner_id(clp);
573 spin_unlock(&clp->cl_lock);
578 * Return a compatible lock_state. If no initialized lock_state structure
579 * exists, return an uninitialized one.
581 * The caller must be holding state->lock_sema and clp->cl_sem
583 struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
585 struct nfs4_lock_state * lsp;
587 lsp = nfs4_find_lock_state(state, owner);
589 lsp = nfs4_alloc_lock_state(state, owner);
594 * Byte-range lock aware utility to initialize the stateid of read/write
598 nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner)
600 if (test_bit(LK_STATE_IN_USE, &state->flags)) {
601 struct nfs4_lock_state *lsp;
603 lsp = nfs4_find_lock_state(state, fl_owner);
605 memcpy(dst, &lsp->ls_stateid, sizeof(*dst));
606 nfs4_put_lock_state(lsp);
610 memcpy(dst, &state->stateid, sizeof(*dst));
614 * Called with state->lock_sema and clp->cl_sem held.
616 void nfs4_increment_lock_seqid(int status, struct nfs4_lock_state *lsp)
618 if (status == NFS_OK || seqid_mutating_err(-status))
623 * Check to see if the request lock (type FL_UNLK) effects the fl lock.
625 * fl and request must have the same posix owner
628 * 0 -> fl not effected by request
629 * 1 -> fl consumed by request
633 nfs4_check_unlock(struct file_lock *fl, struct file_lock *request)
635 if (fl->fl_start >= request->fl_start && fl->fl_end <= request->fl_end)
641 * Post an initialized lock_state on the state->lock_states list.
643 void nfs4_notify_setlk(struct nfs4_state *state, struct file_lock *request, struct nfs4_lock_state *lsp)
645 if (!list_empty(&lsp->ls_locks))
647 atomic_inc(&lsp->ls_count);
648 write_lock(&state->state_lock);
649 list_add(&lsp->ls_locks, &state->lock_states);
650 set_bit(LK_STATE_IN_USE, &state->flags);
651 write_unlock(&state->state_lock);
655 * to decide to 'reap' lock state:
656 * 1) search i_flock for file_locks with fl.lock_state = to ls.
657 * 2) determine if unlock will consume found lock.
664 nfs4_notify_unlck(struct nfs4_state *state, struct file_lock *request, struct nfs4_lock_state *lsp)
666 struct inode *inode = state->inode;
667 struct file_lock *fl;
669 for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
670 if (!(fl->fl_flags & FL_POSIX))
672 if (fl->fl_owner != lsp->ls_owner)
674 /* Exit if we find at least one lock which is not consumed */
675 if (nfs4_check_unlock(fl,request) == 0)
679 write_lock(&state->state_lock);
680 list_del_init(&lsp->ls_locks);
681 if (list_empty(&state->lock_states))
682 clear_bit(LK_STATE_IN_USE, &state->flags);
683 write_unlock(&state->state_lock);
684 nfs4_put_lock_state(lsp);
688 * Release reference to lock_state, and free it if we see that
689 * it is no longer in use
692 nfs4_put_lock_state(struct nfs4_lock_state *lsp)
694 if (!atomic_dec_and_test(&lsp->ls_count))
696 BUG_ON (!list_empty(&lsp->ls_locks));
701 * Called with sp->so_sema and clp->cl_sem held.
703 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
704 * failed with a seqid incrementing error -
705 * see comments nfs_fs.h:seqid_mutating_error()
707 void nfs4_increment_seqid(int status, struct nfs4_state_owner *sp)
709 if (status == NFS_OK || seqid_mutating_err(-status))
711 /* If the server returns BAD_SEQID, unhash state_owner here */
712 if (status == -NFS4ERR_BAD_SEQID)
713 nfs4_unhash_state_owner(sp);
716 static int reclaimer(void *);
717 struct reclaimer_args {
718 struct nfs4_client *clp;
719 struct completion complete;
723 * State recovery routine
726 nfs4_recover_state(void *data)
728 struct nfs4_client *clp = (struct nfs4_client *)data;
729 struct reclaimer_args args = {
734 init_completion(&args.complete);
736 if (kernel_thread(reclaimer, &args, CLONE_KERNEL) < 0)
737 goto out_failed_clear;
738 wait_for_completion(&args.complete);
741 set_bit(NFS4CLNT_OK, &clp->cl_state);
742 wake_up_all(&clp->cl_waitq);
743 rpc_wake_up(&clp->cl_rpcwaitq);
747 * Schedule a state recovery attempt
750 nfs4_schedule_state_recovery(struct nfs4_client *clp)
754 if (test_and_clear_bit(NFS4CLNT_OK, &clp->cl_state))
755 schedule_work(&clp->cl_recoverd);
758 static int nfs4_reclaim_locks(struct nfs4_state *state)
760 struct inode *inode = state->inode;
761 struct file_lock *fl;
764 for (fl = inode->i_flock; fl != 0; fl = fl->fl_next) {
765 if (!(fl->fl_flags & FL_POSIX))
767 if (((struct nfs_open_context *)fl->fl_file->private_data)->state != state)
769 status = nfs4_lock_reclaim(state, fl);
774 printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
775 __FUNCTION__, status);
776 case -NFS4ERR_EXPIRED:
777 case -NFS4ERR_NO_GRACE:
778 case -NFS4ERR_RECLAIM_BAD:
779 case -NFS4ERR_RECLAIM_CONFLICT:
780 /* kill_proc(fl->fl_owner, SIGLOST, 1); */
782 case -NFS4ERR_STALE_CLIENTID:
791 static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp)
793 struct nfs4_state *state;
794 struct nfs4_lock_state *lock;
797 list_for_each_entry(state, &sp->so_states, open_states) {
798 if (state->state == 0)
800 status = nfs4_open_reclaim(sp, state);
801 list_for_each_entry(lock, &state->lock_states, ls_locks)
802 lock->ls_flags &= ~NFS_LOCK_INITIALIZED;
804 status = nfs4_reclaim_locks(state);
807 list_for_each_entry(lock, &state->lock_states, ls_locks) {
808 if (!(lock->ls_flags & NFS_LOCK_INITIALIZED))
809 printk("%s: Lock reclaim failed!\n",
816 printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n",
817 __FUNCTION__, status);
818 case -NFS4ERR_EXPIRED:
819 case -NFS4ERR_NO_GRACE:
820 case -NFS4ERR_RECLAIM_BAD:
821 case -NFS4ERR_RECLAIM_CONFLICT:
823 * Open state on this file cannot be recovered
824 * All we can do is revert to using the zero stateid.
826 memset(state->stateid.data, 0,
827 sizeof(state->stateid.data));
828 /* Mark the file as being 'closed' */
831 case -NFS4ERR_STALE_CLIENTID:
840 static int reclaimer(void *ptr)
842 struct reclaimer_args *args = (struct reclaimer_args *)ptr;
843 struct nfs4_client *clp = args->clp;
844 struct nfs4_state_owner *sp;
847 daemonize("%u.%u.%u.%u-reclaim", NIPQUAD(clp->cl_addr));
848 allow_signal(SIGKILL);
850 atomic_inc(&clp->cl_count);
851 complete(&args->complete);
853 /* Ensure exclusive access to NFSv4 state */
855 down_write(&clp->cl_sem);
856 /* Are there any NFS mounts out there? */
857 if (list_empty(&clp->cl_superblocks))
860 status = nfs4_proc_renew(clp);
861 if (status == 0 || status == -NFS4ERR_CB_PATH_DOWN)
863 status = nfs4_init_client(clp);
866 /* Mark all delagations for reclaim */
867 nfs_delegation_mark_reclaim(clp);
868 /* Note: list is protected by exclusive lock on cl->cl_sem */
869 list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
870 status = nfs4_reclaim_open_state(sp);
872 if (status == -NFS4ERR_STALE_CLIENTID)
877 nfs_delegation_reap_unclaimed(clp);
879 set_bit(NFS4CLNT_OK, &clp->cl_state);
880 up_write(&clp->cl_sem);
882 wake_up_all(&clp->cl_waitq);
883 rpc_wake_up(&clp->cl_rpcwaitq);
884 if (status == -NFS4ERR_CB_PATH_DOWN)
885 nfs_handle_cb_pathdown(clp);
886 nfs4_put_client(clp);
889 printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",
890 NIPQUAD(clp->cl_addr.s_addr), -status);