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/kernel.h>
42 #include <linux/slab.h>
44 #include <linux/nfs_fs.h>
45 #include <linux/nfs_idmap.h>
46 #include <linux/kthread.h>
47 #include <linux/module.h>
48 #include <linux/random.h>
49 #include <linux/ratelimit.h>
50 #include <linux/workqueue.h>
51 #include <linux/bitops.h>
52 #include <linux/jiffies.h>
54 #include <linux/sunrpc/clnt.h>
58 #include "delegation.h"
60 #include "nfs4session.h"
64 #define NFSDBG_FACILITY NFSDBG_STATE
66 #define OPENOWNER_POOL_SIZE 8
68 const nfs4_stateid zero_stateid
;
69 static DEFINE_MUTEX(nfs_clid_init_mutex
);
71 int nfs4_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
73 struct nfs4_setclientid_res clid
= {
74 .clientid
= clp
->cl_clientid
,
75 .confirm
= clp
->cl_confirm
,
79 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
81 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
83 port
= nn
->nfs_callback_tcpport
;
84 if (clp
->cl_addr
.ss_family
== AF_INET6
)
85 port
= nn
->nfs_callback_tcpport6
;
87 status
= nfs4_proc_setclientid(clp
, NFS4_CALLBACK
, port
, cred
, &clid
);
90 clp
->cl_clientid
= clid
.clientid
;
91 clp
->cl_confirm
= clid
.confirm
;
92 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
94 status
= nfs4_proc_setclientid_confirm(clp
, &clid
, cred
);
97 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
98 nfs4_schedule_state_renewal(clp
);
104 * nfs40_discover_server_trunking - Detect server IP address trunking (mv0)
106 * @clp: nfs_client under test
107 * @result: OUT: found nfs_client, or clp
108 * @cred: credential to use for trunking test
110 * Returns zero, a negative errno, or a negative NFS4ERR status.
111 * If zero is returned, an nfs_client pointer is planted in
114 * Note: The returned client may not yet be marked ready.
116 int nfs40_discover_server_trunking(struct nfs_client
*clp
,
117 struct nfs_client
**result
,
118 struct rpc_cred
*cred
)
120 struct nfs4_setclientid_res clid
= {
121 .clientid
= clp
->cl_clientid
,
122 .confirm
= clp
->cl_confirm
,
124 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
128 port
= nn
->nfs_callback_tcpport
;
129 if (clp
->cl_addr
.ss_family
== AF_INET6
)
130 port
= nn
->nfs_callback_tcpport6
;
132 status
= nfs4_proc_setclientid(clp
, NFS4_CALLBACK
, port
, cred
, &clid
);
135 clp
->cl_clientid
= clid
.clientid
;
136 clp
->cl_confirm
= clid
.confirm
;
138 status
= nfs40_walk_client_list(clp
, result
, cred
);
140 case -NFS4ERR_STALE_CLIENTID
:
141 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
143 /* Sustain the lease, even if it's empty. If the clientid4
144 * goes stale it's of no use for trunking discovery. */
145 nfs4_schedule_state_renewal(*result
);
153 struct rpc_cred
*nfs4_get_machine_cred_locked(struct nfs_client
*clp
)
155 struct rpc_cred
*cred
= NULL
;
157 if (clp
->cl_machine_cred
!= NULL
)
158 cred
= get_rpccred(clp
->cl_machine_cred
);
162 static void nfs4_clear_machine_cred(struct nfs_client
*clp
)
164 struct rpc_cred
*cred
;
166 spin_lock(&clp
->cl_lock
);
167 cred
= clp
->cl_machine_cred
;
168 clp
->cl_machine_cred
= NULL
;
169 spin_unlock(&clp
->cl_lock
);
174 static struct rpc_cred
*
175 nfs4_get_renew_cred_server_locked(struct nfs_server
*server
)
177 struct rpc_cred
*cred
= NULL
;
178 struct nfs4_state_owner
*sp
;
181 for (pos
= rb_first(&server
->state_owners
);
183 pos
= rb_next(pos
)) {
184 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
185 if (list_empty(&sp
->so_states
))
187 cred
= get_rpccred(sp
->so_cred
);
194 * nfs4_get_renew_cred_locked - Acquire credential for a renew operation
195 * @clp: client state handle
197 * Returns an rpc_cred with reference count bumped, or NULL.
198 * Caller must hold clp->cl_lock.
200 struct rpc_cred
*nfs4_get_renew_cred_locked(struct nfs_client
*clp
)
202 struct rpc_cred
*cred
= NULL
;
203 struct nfs_server
*server
;
205 /* Use machine credentials if available */
206 cred
= nfs4_get_machine_cred_locked(clp
);
211 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
212 cred
= nfs4_get_renew_cred_server_locked(server
);
222 #if defined(CONFIG_NFS_V4_1)
224 static int nfs41_setup_state_renewal(struct nfs_client
*clp
)
227 struct nfs_fsinfo fsinfo
;
229 if (!test_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
)) {
230 nfs4_schedule_state_renewal(clp
);
234 status
= nfs4_proc_get_lease_time(clp
, &fsinfo
);
236 /* Update lease time and schedule renewal */
237 spin_lock(&clp
->cl_lock
);
238 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
239 clp
->cl_last_renewal
= jiffies
;
240 spin_unlock(&clp
->cl_lock
);
242 nfs4_schedule_state_renewal(clp
);
249 * Back channel returns NFS4ERR_DELAY for new requests when
250 * NFS4_SESSION_DRAINING is set so there is no work to be done when draining
253 static void nfs4_end_drain_session(struct nfs_client
*clp
)
255 struct nfs4_session
*ses
= clp
->cl_session
;
256 struct nfs4_slot_table
*tbl
;
260 tbl
= &ses
->fc_slot_table
;
261 if (test_and_clear_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
262 spin_lock(&tbl
->slot_tbl_lock
);
263 nfs41_wake_slot_table(tbl
);
264 spin_unlock(&tbl
->slot_tbl_lock
);
269 * Signal state manager thread if session fore channel is drained
271 void nfs4_session_drain_complete(struct nfs4_session
*session
,
272 struct nfs4_slot_table
*tbl
)
274 if (nfs4_session_draining(session
))
275 complete(&tbl
->complete
);
278 static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table
*tbl
)
280 spin_lock(&tbl
->slot_tbl_lock
);
281 if (tbl
->highest_used_slotid
!= NFS4_NO_SLOT
) {
282 INIT_COMPLETION(tbl
->complete
);
283 spin_unlock(&tbl
->slot_tbl_lock
);
284 return wait_for_completion_interruptible(&tbl
->complete
);
286 spin_unlock(&tbl
->slot_tbl_lock
);
290 static int nfs4_begin_drain_session(struct nfs_client
*clp
)
292 struct nfs4_session
*ses
= clp
->cl_session
;
295 set_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
);
297 ret
= nfs4_wait_on_slot_tbl(&ses
->bc_slot_table
);
301 return nfs4_wait_on_slot_tbl(&ses
->fc_slot_table
);
304 static void nfs41_finish_session_reset(struct nfs_client
*clp
)
306 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
307 clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
308 /* create_session negotiated new slot table */
309 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
310 nfs41_setup_state_renewal(clp
);
313 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
317 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
319 nfs4_begin_drain_session(clp
);
320 status
= nfs4_proc_exchange_id(clp
, cred
);
323 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
325 status
= nfs4_proc_create_session(clp
, cred
);
328 nfs41_finish_session_reset(clp
);
329 nfs_mark_client_ready(clp
, NFS_CS_READY
);
335 * nfs41_discover_server_trunking - Detect server IP address trunking (mv1)
337 * @clp: nfs_client under test
338 * @result: OUT: found nfs_client, or clp
339 * @cred: credential to use for trunking test
341 * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status.
342 * If NFS4_OK is returned, an nfs_client pointer is planted in
345 * Note: The returned client may not yet be marked ready.
347 int nfs41_discover_server_trunking(struct nfs_client
*clp
,
348 struct nfs_client
**result
,
349 struct rpc_cred
*cred
)
353 status
= nfs4_proc_exchange_id(clp
, cred
);
354 if (status
!= NFS4_OK
)
356 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
358 return nfs41_walk_client_list(clp
, result
, cred
);
361 struct rpc_cred
*nfs4_get_exchange_id_cred(struct nfs_client
*clp
)
363 struct rpc_cred
*cred
;
365 spin_lock(&clp
->cl_lock
);
366 cred
= nfs4_get_machine_cred_locked(clp
);
367 spin_unlock(&clp
->cl_lock
);
371 #endif /* CONFIG_NFS_V4_1 */
373 static struct rpc_cred
*
374 nfs4_get_setclientid_cred_server(struct nfs_server
*server
)
376 struct nfs_client
*clp
= server
->nfs_client
;
377 struct rpc_cred
*cred
= NULL
;
378 struct nfs4_state_owner
*sp
;
381 spin_lock(&clp
->cl_lock
);
382 pos
= rb_first(&server
->state_owners
);
384 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
385 cred
= get_rpccred(sp
->so_cred
);
387 spin_unlock(&clp
->cl_lock
);
392 * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation
393 * @clp: client state handle
395 * Returns an rpc_cred with reference count bumped, or NULL.
397 struct rpc_cred
*nfs4_get_setclientid_cred(struct nfs_client
*clp
)
399 struct nfs_server
*server
;
400 struct rpc_cred
*cred
;
402 spin_lock(&clp
->cl_lock
);
403 cred
= nfs4_get_machine_cred_locked(clp
);
404 spin_unlock(&clp
->cl_lock
);
409 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
410 cred
= nfs4_get_setclientid_cred_server(server
);
420 static struct nfs4_state_owner
*
421 nfs4_find_state_owner_locked(struct nfs_server
*server
, struct rpc_cred
*cred
)
423 struct rb_node
**p
= &server
->state_owners
.rb_node
,
425 struct nfs4_state_owner
*sp
;
429 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
431 if (cred
< sp
->so_cred
)
432 p
= &parent
->rb_left
;
433 else if (cred
> sp
->so_cred
)
434 p
= &parent
->rb_right
;
436 if (!list_empty(&sp
->so_lru
))
437 list_del_init(&sp
->so_lru
);
438 atomic_inc(&sp
->so_count
);
445 static struct nfs4_state_owner
*
446 nfs4_insert_state_owner_locked(struct nfs4_state_owner
*new)
448 struct nfs_server
*server
= new->so_server
;
449 struct rb_node
**p
= &server
->state_owners
.rb_node
,
451 struct nfs4_state_owner
*sp
;
456 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
458 if (new->so_cred
< sp
->so_cred
)
459 p
= &parent
->rb_left
;
460 else if (new->so_cred
> sp
->so_cred
)
461 p
= &parent
->rb_right
;
463 if (!list_empty(&sp
->so_lru
))
464 list_del_init(&sp
->so_lru
);
465 atomic_inc(&sp
->so_count
);
469 err
= ida_get_new(&server
->openowner_id
, &new->so_seqid
.owner_id
);
472 rb_link_node(&new->so_server_node
, parent
, p
);
473 rb_insert_color(&new->so_server_node
, &server
->state_owners
);
478 nfs4_remove_state_owner_locked(struct nfs4_state_owner
*sp
)
480 struct nfs_server
*server
= sp
->so_server
;
482 if (!RB_EMPTY_NODE(&sp
->so_server_node
))
483 rb_erase(&sp
->so_server_node
, &server
->state_owners
);
484 ida_remove(&server
->openowner_id
, sp
->so_seqid
.owner_id
);
488 nfs4_init_seqid_counter(struct nfs_seqid_counter
*sc
)
490 sc
->create_time
= ktime_get();
493 spin_lock_init(&sc
->lock
);
494 INIT_LIST_HEAD(&sc
->list
);
495 rpc_init_wait_queue(&sc
->wait
, "Seqid_waitqueue");
499 nfs4_destroy_seqid_counter(struct nfs_seqid_counter
*sc
)
501 rpc_destroy_wait_queue(&sc
->wait
);
505 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
506 * create a new state_owner.
509 static struct nfs4_state_owner
*
510 nfs4_alloc_state_owner(struct nfs_server
*server
,
511 struct rpc_cred
*cred
,
514 struct nfs4_state_owner
*sp
;
516 sp
= kzalloc(sizeof(*sp
), gfp_flags
);
519 sp
->so_server
= server
;
520 sp
->so_cred
= get_rpccred(cred
);
521 spin_lock_init(&sp
->so_lock
);
522 INIT_LIST_HEAD(&sp
->so_states
);
523 nfs4_init_seqid_counter(&sp
->so_seqid
);
524 atomic_set(&sp
->so_count
, 1);
525 INIT_LIST_HEAD(&sp
->so_lru
);
530 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
532 struct rb_node
*rb_node
= &sp
->so_server_node
;
534 if (!RB_EMPTY_NODE(rb_node
)) {
535 struct nfs_server
*server
= sp
->so_server
;
536 struct nfs_client
*clp
= server
->nfs_client
;
538 spin_lock(&clp
->cl_lock
);
539 if (!RB_EMPTY_NODE(rb_node
)) {
540 rb_erase(rb_node
, &server
->state_owners
);
541 RB_CLEAR_NODE(rb_node
);
543 spin_unlock(&clp
->cl_lock
);
547 static void nfs4_free_state_owner(struct nfs4_state_owner
*sp
)
549 nfs4_destroy_seqid_counter(&sp
->so_seqid
);
550 put_rpccred(sp
->so_cred
);
554 static void nfs4_gc_state_owners(struct nfs_server
*server
)
556 struct nfs_client
*clp
= server
->nfs_client
;
557 struct nfs4_state_owner
*sp
, *tmp
;
558 unsigned long time_min
, time_max
;
561 spin_lock(&clp
->cl_lock
);
563 time_min
= (long)time_max
- (long)clp
->cl_lease_time
;
564 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
565 /* NB: LRU is sorted so that oldest is at the head */
566 if (time_in_range(sp
->so_expires
, time_min
, time_max
))
568 list_move(&sp
->so_lru
, &doomed
);
569 nfs4_remove_state_owner_locked(sp
);
571 spin_unlock(&clp
->cl_lock
);
573 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
574 list_del(&sp
->so_lru
);
575 nfs4_free_state_owner(sp
);
580 * nfs4_get_state_owner - Look up a state owner given a credential
581 * @server: nfs_server to search
582 * @cred: RPC credential to match
584 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
586 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
,
587 struct rpc_cred
*cred
,
590 struct nfs_client
*clp
= server
->nfs_client
;
591 struct nfs4_state_owner
*sp
, *new;
593 spin_lock(&clp
->cl_lock
);
594 sp
= nfs4_find_state_owner_locked(server
, cred
);
595 spin_unlock(&clp
->cl_lock
);
598 new = nfs4_alloc_state_owner(server
, cred
, gfp_flags
);
602 if (ida_pre_get(&server
->openowner_id
, gfp_flags
) == 0)
604 spin_lock(&clp
->cl_lock
);
605 sp
= nfs4_insert_state_owner_locked(new);
606 spin_unlock(&clp
->cl_lock
);
607 } while (sp
== ERR_PTR(-EAGAIN
));
609 nfs4_free_state_owner(new);
611 nfs4_gc_state_owners(server
);
616 * nfs4_put_state_owner - Release a nfs4_state_owner
617 * @sp: state owner data to release
619 * Note that we keep released state owners on an LRU
621 * This caches valid state owners so that they can be
622 * reused, to avoid the OPEN_CONFIRM on minor version 0.
623 * It also pins the uniquifier of dropped state owners for
624 * a while, to ensure that those state owner names are
627 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
629 struct nfs_server
*server
= sp
->so_server
;
630 struct nfs_client
*clp
= server
->nfs_client
;
632 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
635 sp
->so_expires
= jiffies
;
636 list_add_tail(&sp
->so_lru
, &server
->state_owners_lru
);
637 spin_unlock(&clp
->cl_lock
);
641 * nfs4_purge_state_owners - Release all cached state owners
642 * @server: nfs_server with cached state owners to release
644 * Called at umount time. Remaining state owners will be on
645 * the LRU with ref count of zero.
647 void nfs4_purge_state_owners(struct nfs_server
*server
)
649 struct nfs_client
*clp
= server
->nfs_client
;
650 struct nfs4_state_owner
*sp
, *tmp
;
653 spin_lock(&clp
->cl_lock
);
654 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
655 list_move(&sp
->so_lru
, &doomed
);
656 nfs4_remove_state_owner_locked(sp
);
658 spin_unlock(&clp
->cl_lock
);
660 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
661 list_del(&sp
->so_lru
);
662 nfs4_free_state_owner(sp
);
666 static struct nfs4_state
*
667 nfs4_alloc_open_state(void)
669 struct nfs4_state
*state
;
671 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
674 atomic_set(&state
->count
, 1);
675 INIT_LIST_HEAD(&state
->lock_states
);
676 spin_lock_init(&state
->state_lock
);
677 seqlock_init(&state
->seqlock
);
682 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
684 if (state
->state
== fmode
)
686 /* NB! List reordering - see the reclaim code for why. */
687 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
688 if (fmode
& FMODE_WRITE
)
689 list_move(&state
->open_states
, &state
->owner
->so_states
);
691 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
693 state
->state
= fmode
;
696 static struct nfs4_state
*
697 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
699 struct nfs_inode
*nfsi
= NFS_I(inode
);
700 struct nfs4_state
*state
;
702 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
703 if (state
->owner
!= owner
)
705 if (atomic_inc_not_zero(&state
->count
))
712 nfs4_free_open_state(struct nfs4_state
*state
)
718 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
720 struct nfs4_state
*state
, *new;
721 struct nfs_inode
*nfsi
= NFS_I(inode
);
723 spin_lock(&inode
->i_lock
);
724 state
= __nfs4_find_state_byowner(inode
, owner
);
725 spin_unlock(&inode
->i_lock
);
728 new = nfs4_alloc_open_state();
729 spin_lock(&owner
->so_lock
);
730 spin_lock(&inode
->i_lock
);
731 state
= __nfs4_find_state_byowner(inode
, owner
);
732 if (state
== NULL
&& new != NULL
) {
734 state
->owner
= owner
;
735 atomic_inc(&owner
->so_count
);
736 list_add(&state
->inode_states
, &nfsi
->open_states
);
738 state
->inode
= inode
;
739 spin_unlock(&inode
->i_lock
);
740 /* Note: The reclaim code dictates that we add stateless
741 * and read-only stateids to the end of the list */
742 list_add_tail(&state
->open_states
, &owner
->so_states
);
743 spin_unlock(&owner
->so_lock
);
745 spin_unlock(&inode
->i_lock
);
746 spin_unlock(&owner
->so_lock
);
748 nfs4_free_open_state(new);
754 void nfs4_put_open_state(struct nfs4_state
*state
)
756 struct inode
*inode
= state
->inode
;
757 struct nfs4_state_owner
*owner
= state
->owner
;
759 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
761 spin_lock(&inode
->i_lock
);
762 list_del(&state
->inode_states
);
763 list_del(&state
->open_states
);
764 spin_unlock(&inode
->i_lock
);
765 spin_unlock(&owner
->so_lock
);
767 nfs4_free_open_state(state
);
768 nfs4_put_state_owner(owner
);
772 * Close the current file.
774 static void __nfs4_close(struct nfs4_state
*state
,
775 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
777 struct nfs4_state_owner
*owner
= state
->owner
;
781 atomic_inc(&owner
->so_count
);
782 /* Protect against nfs4_find_state() */
783 spin_lock(&owner
->so_lock
);
784 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
791 case FMODE_READ
|FMODE_WRITE
:
794 newstate
= FMODE_READ
|FMODE_WRITE
;
795 if (state
->n_rdwr
== 0) {
796 if (state
->n_rdonly
== 0) {
797 newstate
&= ~FMODE_READ
;
798 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
799 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
801 if (state
->n_wronly
== 0) {
802 newstate
&= ~FMODE_WRITE
;
803 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
804 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
807 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
809 nfs4_state_set_mode_locked(state
, newstate
);
810 spin_unlock(&owner
->so_lock
);
813 nfs4_put_open_state(state
);
814 nfs4_put_state_owner(owner
);
816 nfs4_do_close(state
, gfp_mask
, wait
);
819 void nfs4_close_state(struct nfs4_state
*state
, fmode_t fmode
)
821 __nfs4_close(state
, fmode
, GFP_NOFS
, 0);
824 void nfs4_close_sync(struct nfs4_state
*state
, fmode_t fmode
)
826 __nfs4_close(state
, fmode
, GFP_KERNEL
, 1);
830 * Search the state->lock_states for an existing lock_owner
831 * that is compatible with current->files
833 static struct nfs4_lock_state
*
834 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
836 struct nfs4_lock_state
*pos
;
837 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
838 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
840 switch (pos
->ls_owner
.lo_type
) {
841 case NFS4_POSIX_LOCK_TYPE
:
842 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
845 case NFS4_FLOCK_LOCK_TYPE
:
846 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
849 atomic_inc(&pos
->ls_count
);
856 * Return a compatible lock_state. If no initialized lock_state structure
857 * exists, return an uninitialized one.
860 static struct nfs4_lock_state
*nfs4_alloc_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
862 struct nfs4_lock_state
*lsp
;
863 struct nfs_server
*server
= state
->owner
->so_server
;
865 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
868 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
869 atomic_set(&lsp
->ls_count
, 1);
870 lsp
->ls_state
= state
;
871 lsp
->ls_owner
.lo_type
= type
;
872 switch (lsp
->ls_owner
.lo_type
) {
873 case NFS4_FLOCK_LOCK_TYPE
:
874 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
876 case NFS4_POSIX_LOCK_TYPE
:
877 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
882 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
883 if (lsp
->ls_seqid
.owner_id
< 0)
885 INIT_LIST_HEAD(&lsp
->ls_locks
);
892 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
894 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
895 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
900 * Return a compatible lock_state. If no initialized lock_state structure
901 * exists, return an uninitialized one.
904 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
906 struct nfs4_lock_state
*lsp
, *new = NULL
;
909 spin_lock(&state
->state_lock
);
910 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
914 list_add(&new->ls_locks
, &state
->lock_states
);
915 set_bit(LK_STATE_IN_USE
, &state
->flags
);
920 spin_unlock(&state
->state_lock
);
921 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
925 spin_unlock(&state
->state_lock
);
927 nfs4_free_lock_state(state
->owner
->so_server
, new);
932 * Release reference to lock_state, and free it if we see that
933 * it is no longer in use
935 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
937 struct nfs4_state
*state
;
941 state
= lsp
->ls_state
;
942 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
944 list_del(&lsp
->ls_locks
);
945 if (list_empty(&state
->lock_states
))
946 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
947 spin_unlock(&state
->state_lock
);
948 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
949 if (nfs4_release_lockowner(lsp
) == 0)
952 nfs4_free_lock_state(lsp
->ls_state
->owner
->so_server
, lsp
);
955 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
957 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
959 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
960 atomic_inc(&lsp
->ls_count
);
963 static void nfs4_fl_release_lock(struct file_lock
*fl
)
965 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
968 static const struct file_lock_operations nfs4_fl_lock_ops
= {
969 .fl_copy_lock
= nfs4_fl_copy_lock
,
970 .fl_release_private
= nfs4_fl_release_lock
,
973 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
975 struct nfs4_lock_state
*lsp
;
977 if (fl
->fl_ops
!= NULL
)
979 if (fl
->fl_flags
& FL_POSIX
)
980 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
981 else if (fl
->fl_flags
& FL_FLOCK
)
982 lsp
= nfs4_get_lock_state(state
, NULL
, fl
->fl_pid
,
983 NFS4_FLOCK_LOCK_TYPE
);
988 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
989 fl
->fl_ops
= &nfs4_fl_lock_ops
;
993 static bool nfs4_copy_lock_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
994 const struct nfs_lockowner
*lockowner
)
996 struct nfs4_lock_state
*lsp
;
1002 if (lockowner
== NULL
)
1005 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
1008 fl_owner
= lockowner
->l_owner
;
1009 fl_pid
= lockowner
->l_pid
;
1010 spin_lock(&state
->state_lock
);
1011 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
1012 if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
1013 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
1016 spin_unlock(&state
->state_lock
);
1017 nfs4_put_lock_state(lsp
);
1022 static void nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
1027 seq
= read_seqbegin(&state
->seqlock
);
1028 nfs4_stateid_copy(dst
, &state
->stateid
);
1029 } while (read_seqretry(&state
->seqlock
, seq
));
1033 * Byte-range lock aware utility to initialize the stateid of read/write
1036 void nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
1037 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
1039 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
))
1041 if (nfs4_copy_lock_stateid(dst
, state
, lockowner
))
1043 nfs4_copy_open_stateid(dst
, state
);
1046 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1048 struct nfs_seqid
*new;
1050 new = kmalloc(sizeof(*new), gfp_mask
);
1052 new->sequence
= counter
;
1053 INIT_LIST_HEAD(&new->list
);
1059 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1061 struct nfs_seqid_counter
*sequence
;
1063 if (list_empty(&seqid
->list
))
1065 sequence
= seqid
->sequence
;
1066 spin_lock(&sequence
->lock
);
1067 list_del_init(&seqid
->list
);
1068 if (!list_empty(&sequence
->list
)) {
1069 struct nfs_seqid
*next
;
1071 next
= list_first_entry(&sequence
->list
,
1072 struct nfs_seqid
, list
);
1073 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1075 spin_unlock(&sequence
->lock
);
1078 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1080 nfs_release_seqid(seqid
);
1085 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1086 * failed with a seqid incrementing error -
1087 * see comments nfs_fs.h:seqid_mutating_error()
1089 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1094 case -NFS4ERR_BAD_SEQID
:
1095 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1097 pr_warn_ratelimited("NFS: v4 server returned a bad"
1098 " sequence-id error on an"
1099 " unconfirmed sequence %p!\n",
1101 case -NFS4ERR_STALE_CLIENTID
:
1102 case -NFS4ERR_STALE_STATEID
:
1103 case -NFS4ERR_BAD_STATEID
:
1104 case -NFS4ERR_BADXDR
:
1105 case -NFS4ERR_RESOURCE
:
1106 case -NFS4ERR_NOFILEHANDLE
:
1107 /* Non-seqid mutating errors */
1111 * Note: no locking needed as we are guaranteed to be first
1112 * on the sequence list
1114 seqid
->sequence
->counter
++;
1117 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1119 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1120 struct nfs4_state_owner
, so_seqid
);
1121 struct nfs_server
*server
= sp
->so_server
;
1123 if (status
== -NFS4ERR_BAD_SEQID
)
1124 nfs4_drop_state_owner(sp
);
1125 if (!nfs4_has_session(server
->nfs_client
))
1126 nfs_increment_seqid(status
, seqid
);
1130 * Increment the seqid if the LOCK/LOCKU succeeded, or
1131 * failed with a seqid incrementing error -
1132 * see comments nfs_fs.h:seqid_mutating_error()
1134 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1136 nfs_increment_seqid(status
, seqid
);
1139 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1141 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1144 spin_lock(&sequence
->lock
);
1146 if (list_empty(&seqid
->list
))
1147 list_add_tail(&seqid
->list
, &sequence
->list
);
1148 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1150 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1153 spin_unlock(&sequence
->lock
);
1157 static int nfs4_run_state_manager(void *);
1159 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1161 smp_mb__before_clear_bit();
1162 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1163 smp_mb__after_clear_bit();
1164 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1165 rpc_wake_up(&clp
->cl_rpcwaitq
);
1169 * Schedule the nfs_client asynchronous state management routine
1171 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1173 struct task_struct
*task
;
1174 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1176 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1178 __module_get(THIS_MODULE
);
1179 atomic_inc(&clp
->cl_count
);
1181 /* The rcu_read_lock() is not strictly necessary, as the state
1182 * manager is the only thread that ever changes the rpc_xprt
1183 * after it's initialized. At this point, we're single threaded. */
1185 snprintf(buf
, sizeof(buf
), "%s-manager",
1186 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1188 task
= kthread_run(nfs4_run_state_manager
, clp
, buf
);
1190 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1191 __func__
, PTR_ERR(task
));
1192 nfs4_clear_state_manager_bit(clp
);
1193 nfs_put_client(clp
);
1194 module_put(THIS_MODULE
);
1199 * Schedule a lease recovery attempt
1201 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1205 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1206 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1207 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1209 nfs4_schedule_state_manager(clp
);
1211 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1213 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1219 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1220 nfs_wait_bit_killable
, TASK_KILLABLE
);
1224 if (clp
->cl_cons_state
< 0)
1225 return clp
->cl_cons_state
;
1229 int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1234 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1235 ret
= nfs4_wait_clnt_recover(clp
);
1238 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1239 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1241 nfs4_schedule_state_manager(clp
);
1248 * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
1249 * @clp: client to process
1251 * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a
1252 * resend of the SETCLIENTID and hence re-establish the
1253 * callback channel. Then return all existing delegations.
1255 static void nfs40_handle_cb_pathdown(struct nfs_client
*clp
)
1257 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1258 nfs_expire_all_delegations(clp
);
1259 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__
,
1263 void nfs4_schedule_path_down_recovery(struct nfs_client
*clp
)
1265 nfs40_handle_cb_pathdown(clp
);
1266 nfs4_schedule_state_manager(clp
);
1269 static int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
1272 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1273 /* Don't recover state that expired before the reboot */
1274 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
1275 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1278 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
1279 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1283 static int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
1285 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
1286 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1287 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
1288 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
1292 void nfs4_schedule_stateid_recovery(const struct nfs_server
*server
, struct nfs4_state
*state
)
1294 struct nfs_client
*clp
= server
->nfs_client
;
1296 nfs4_state_mark_reclaim_nograce(clp
, state
);
1297 dprintk("%s: scheduling stateid recovery for server %s\n", __func__
,
1299 nfs4_schedule_state_manager(clp
);
1301 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery
);
1303 void nfs_inode_find_state_and_recover(struct inode
*inode
,
1304 const nfs4_stateid
*stateid
)
1306 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1307 struct nfs_inode
*nfsi
= NFS_I(inode
);
1308 struct nfs_open_context
*ctx
;
1309 struct nfs4_state
*state
;
1312 spin_lock(&inode
->i_lock
);
1313 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1317 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
1319 if (!nfs4_stateid_match(&state
->stateid
, stateid
))
1321 nfs4_state_mark_reclaim_nograce(clp
, state
);
1324 spin_unlock(&inode
->i_lock
);
1326 nfs4_schedule_state_manager(clp
);
1330 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
1332 struct inode
*inode
= state
->inode
;
1333 struct nfs_inode
*nfsi
= NFS_I(inode
);
1334 struct file_lock
*fl
;
1337 if (inode
->i_flock
== NULL
)
1340 /* Guard against delegation returns and new lock/unlock calls */
1341 down_write(&nfsi
->rwsem
);
1342 /* Protect inode->i_flock using the BKL */
1344 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
1345 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
1347 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1350 status
= ops
->recover_lock(state
, fl
);
1355 case -NFS4ERR_ADMIN_REVOKED
:
1356 case -NFS4ERR_STALE_STATEID
:
1357 case -NFS4ERR_BAD_STATEID
:
1358 case -NFS4ERR_EXPIRED
:
1359 case -NFS4ERR_NO_GRACE
:
1360 case -NFS4ERR_STALE_CLIENTID
:
1361 case -NFS4ERR_BADSESSION
:
1362 case -NFS4ERR_BADSLOT
:
1363 case -NFS4ERR_BAD_HIGH_SLOT
:
1364 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1367 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1368 "Zeroing state\n", __func__
, status
);
1370 case -NFS4ERR_DENIED
:
1371 case -NFS4ERR_RECLAIM_BAD
:
1372 case -NFS4ERR_RECLAIM_CONFLICT
:
1373 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1380 up_write(&nfsi
->rwsem
);
1384 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1386 struct nfs4_state
*state
;
1387 struct nfs4_lock_state
*lock
;
1390 /* Note: we rely on the sp->so_states list being ordered
1391 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1393 * This is needed to ensure that the server won't give us any
1394 * read delegations that we have to return if, say, we are
1395 * recovering after a network partition or a reboot from a
1396 * server that doesn't support a grace period.
1399 spin_lock(&sp
->so_lock
);
1400 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1401 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1403 if (state
->state
== 0)
1405 atomic_inc(&state
->count
);
1406 spin_unlock(&sp
->so_lock
);
1407 status
= ops
->recover_open(sp
, state
);
1409 status
= nfs4_reclaim_locks(state
, ops
);
1411 spin_lock(&state
->state_lock
);
1412 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1413 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1414 pr_warn_ratelimited("NFS: "
1416 "failed!\n", __func__
);
1418 spin_unlock(&state
->state_lock
);
1419 nfs4_put_open_state(state
);
1425 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1426 "Zeroing state\n", __func__
, status
);
1431 * Open state on this file cannot be recovered
1432 * All we can do is revert to using the zero stateid.
1434 memset(&state
->stateid
, 0,
1435 sizeof(state
->stateid
));
1436 /* Mark the file as being 'closed' */
1439 case -NFS4ERR_ADMIN_REVOKED
:
1440 case -NFS4ERR_STALE_STATEID
:
1441 case -NFS4ERR_BAD_STATEID
:
1442 case -NFS4ERR_RECLAIM_BAD
:
1443 case -NFS4ERR_RECLAIM_CONFLICT
:
1444 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1446 case -NFS4ERR_EXPIRED
:
1447 case -NFS4ERR_NO_GRACE
:
1448 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1449 case -NFS4ERR_STALE_CLIENTID
:
1450 case -NFS4ERR_BADSESSION
:
1451 case -NFS4ERR_BADSLOT
:
1452 case -NFS4ERR_BAD_HIGH_SLOT
:
1453 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1456 nfs4_put_open_state(state
);
1459 spin_unlock(&sp
->so_lock
);
1462 nfs4_put_open_state(state
);
1466 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1468 struct nfs4_lock_state
*lock
;
1470 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1471 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1472 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1473 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1474 spin_lock(&state
->state_lock
);
1475 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1476 lock
->ls_seqid
.flags
= 0;
1477 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1479 spin_unlock(&state
->state_lock
);
1482 static void nfs4_reset_seqids(struct nfs_server
*server
,
1483 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1485 struct nfs_client
*clp
= server
->nfs_client
;
1486 struct nfs4_state_owner
*sp
;
1487 struct rb_node
*pos
;
1488 struct nfs4_state
*state
;
1490 spin_lock(&clp
->cl_lock
);
1491 for (pos
= rb_first(&server
->state_owners
);
1493 pos
= rb_next(pos
)) {
1494 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1495 sp
->so_seqid
.flags
= 0;
1496 spin_lock(&sp
->so_lock
);
1497 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1498 if (mark_reclaim(clp
, state
))
1499 nfs4_clear_open_state(state
);
1501 spin_unlock(&sp
->so_lock
);
1503 spin_unlock(&clp
->cl_lock
);
1506 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1507 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1509 struct nfs_server
*server
;
1512 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1513 nfs4_reset_seqids(server
, mark_reclaim
);
1517 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1519 /* Mark all delegations for reclaim */
1520 nfs_delegation_mark_reclaim(clp
);
1521 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1524 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1525 const struct nfs4_state_recovery_ops
*ops
)
1527 /* Notify the server we're done reclaiming our state */
1528 if (ops
->reclaim_complete
)
1529 (void)ops
->reclaim_complete(clp
);
1532 static void nfs4_clear_reclaim_server(struct nfs_server
*server
)
1534 struct nfs_client
*clp
= server
->nfs_client
;
1535 struct nfs4_state_owner
*sp
;
1536 struct rb_node
*pos
;
1537 struct nfs4_state
*state
;
1539 spin_lock(&clp
->cl_lock
);
1540 for (pos
= rb_first(&server
->state_owners
);
1542 pos
= rb_next(pos
)) {
1543 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1544 spin_lock(&sp
->so_lock
);
1545 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1546 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
,
1549 nfs4_state_mark_reclaim_nograce(clp
, state
);
1551 spin_unlock(&sp
->so_lock
);
1553 spin_unlock(&clp
->cl_lock
);
1556 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1558 struct nfs_server
*server
;
1560 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1564 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1565 nfs4_clear_reclaim_server(server
);
1568 nfs_delegation_reap_unclaimed(clp
);
1572 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1574 if (!nfs4_state_clear_reclaim_reboot(clp
))
1576 nfs4_reclaim_complete(clp
, clp
->cl_mvops
->reboot_recovery_ops
);
1579 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1581 nfs_delegation_mark_reclaim(clp
);
1582 nfs_delegation_reap_unclaimed(clp
);
1585 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1587 nfs_delegation_clear_all(clp
);
1588 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1591 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1596 case -NFS4ERR_CB_PATH_DOWN
:
1597 nfs40_handle_cb_pathdown(clp
);
1599 case -NFS4ERR_NO_GRACE
:
1600 nfs4_state_end_reclaim_reboot(clp
);
1602 case -NFS4ERR_STALE_CLIENTID
:
1603 case -NFS4ERR_LEASE_MOVED
:
1604 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1605 nfs4_state_clear_reclaim_reboot(clp
);
1606 nfs4_state_start_reclaim_reboot(clp
);
1608 case -NFS4ERR_EXPIRED
:
1609 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1610 nfs4_state_start_reclaim_nograce(clp
);
1612 case -NFS4ERR_BADSESSION
:
1613 case -NFS4ERR_BADSLOT
:
1614 case -NFS4ERR_BAD_HIGH_SLOT
:
1615 case -NFS4ERR_DEADSESSION
:
1616 case -NFS4ERR_SEQ_FALSE_RETRY
:
1617 case -NFS4ERR_SEQ_MISORDERED
:
1618 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1619 /* Zero session reset errors */
1621 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1622 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1625 dprintk("%s: failed to handle error %d for server %s\n",
1626 __func__
, error
, clp
->cl_hostname
);
1629 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1634 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1636 struct nfs4_state_owner
*sp
;
1637 struct nfs_server
*server
;
1638 struct rb_node
*pos
;
1643 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1644 nfs4_purge_state_owners(server
);
1645 spin_lock(&clp
->cl_lock
);
1646 for (pos
= rb_first(&server
->state_owners
);
1648 pos
= rb_next(pos
)) {
1650 struct nfs4_state_owner
, so_server_node
);
1651 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1654 atomic_inc(&sp
->so_count
);
1655 spin_unlock(&clp
->cl_lock
);
1658 status
= nfs4_reclaim_open_state(sp
, ops
);
1660 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1661 nfs4_put_state_owner(sp
);
1662 return nfs4_recovery_handle_error(clp
, status
);
1665 nfs4_put_state_owner(sp
);
1668 spin_unlock(&clp
->cl_lock
);
1674 static int nfs4_check_lease(struct nfs_client
*clp
)
1676 struct rpc_cred
*cred
;
1677 const struct nfs4_state_maintenance_ops
*ops
=
1678 clp
->cl_mvops
->state_renewal_ops
;
1681 /* Is the client already known to have an expired lease? */
1682 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1684 spin_lock(&clp
->cl_lock
);
1685 cred
= ops
->get_state_renewal_cred_locked(clp
);
1686 spin_unlock(&clp
->cl_lock
);
1688 cred
= nfs4_get_setclientid_cred(clp
);
1693 status
= ops
->renew_lease(clp
, cred
);
1696 return nfs4_recovery_handle_error(clp
, status
);
1699 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1700 * and for recoverable errors on EXCHANGE_ID for v4.1
1702 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1705 case -NFS4ERR_SEQ_MISORDERED
:
1706 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1707 return -ESERVERFAULT
;
1708 /* Lease confirmation error: retry after purging the lease */
1710 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1712 case -NFS4ERR_STALE_CLIENTID
:
1713 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1714 nfs4_state_clear_reclaim_reboot(clp
);
1715 nfs4_state_start_reclaim_reboot(clp
);
1717 case -NFS4ERR_CLID_INUSE
:
1718 pr_err("NFS: Server %s reports our clientid is in use\n",
1720 nfs_mark_client_ready(clp
, -EPERM
);
1721 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1724 if (clp
->cl_machine_cred
== NULL
)
1726 /* Handle case where the user hasn't set up machine creds */
1727 nfs4_clear_machine_cred(clp
);
1728 case -NFS4ERR_DELAY
:
1734 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1735 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1736 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1737 dprintk("%s: exit with error %d for server %s\n",
1738 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1739 return -EPROTONOSUPPORT
;
1740 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1741 * in nfs4_exchange_id */
1743 dprintk("%s: exit with error %d for server %s\n", __func__
,
1744 status
, clp
->cl_hostname
);
1747 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1748 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1753 static int nfs4_establish_lease(struct nfs_client
*clp
)
1755 struct rpc_cred
*cred
;
1756 const struct nfs4_state_recovery_ops
*ops
=
1757 clp
->cl_mvops
->reboot_recovery_ops
;
1760 cred
= ops
->get_clid_cred(clp
);
1763 status
= ops
->establish_clid(clp
, cred
);
1767 pnfs_destroy_all_layouts(clp
);
1772 * Returns zero or a negative errno. NFS4ERR values are converted
1773 * to local errno values.
1775 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1779 status
= nfs4_establish_lease(clp
);
1781 return nfs4_handle_reclaim_lease_error(clp
, status
);
1782 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1783 nfs4_state_start_reclaim_nograce(clp
);
1784 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1785 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1786 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1787 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1791 static int nfs4_purge_lease(struct nfs_client
*clp
)
1795 status
= nfs4_establish_lease(clp
);
1797 return nfs4_handle_reclaim_lease_error(clp
, status
);
1798 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1799 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1800 nfs4_state_start_reclaim_nograce(clp
);
1805 * nfs4_discover_server_trunking - Detect server IP address trunking
1807 * @clp: nfs_client under test
1808 * @result: OUT: found nfs_client, or clp
1810 * Returns zero or a negative errno. If zero is returned,
1811 * an nfs_client pointer is planted in "result".
1813 * Note: since we are invoked in process context, and
1814 * not from inside the state manager, we cannot use
1815 * nfs4_handle_reclaim_lease_error().
1817 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
1818 struct nfs_client
**result
)
1820 const struct nfs4_state_recovery_ops
*ops
=
1821 clp
->cl_mvops
->reboot_recovery_ops
;
1822 rpc_authflavor_t
*flavors
, flav
, save
;
1823 struct rpc_clnt
*clnt
;
1824 struct rpc_cred
*cred
;
1827 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
1829 len
= NFS_MAX_SECFLAVORS
;
1830 flavors
= kcalloc(len
, sizeof(*flavors
), GFP_KERNEL
);
1831 if (flavors
== NULL
) {
1835 len
= rpcauth_list_flavors(flavors
, len
);
1840 clnt
= clp
->cl_rpcclient
;
1841 save
= clnt
->cl_auth
->au_flavor
;
1844 mutex_lock(&nfs_clid_init_mutex
);
1847 cred
= ops
->get_clid_cred(clp
);
1851 status
= ops
->detect_trunking(clp
, result
, cred
);
1858 if (clp
->cl_machine_cred
== NULL
)
1860 /* Handle case where the user hasn't set up machine creds */
1861 nfs4_clear_machine_cred(clp
);
1862 case -NFS4ERR_DELAY
:
1866 dprintk("NFS: %s after status %d, retrying\n",
1870 case -NFS4ERR_CLID_INUSE
:
1871 case -NFS4ERR_WRONGSEC
:
1876 flav
= flavors
[i
++];
1878 flav
= flavors
[i
++];
1879 clnt
= rpc_clone_client_set_auth(clnt
, flav
);
1881 status
= PTR_ERR(clnt
);
1884 clp
->cl_rpcclient
= clnt
;
1887 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1888 status
= -EPROTONOSUPPORT
;
1892 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1893 * in nfs4_exchange_id */
1894 status
= -EKEYEXPIRED
;
1898 mutex_unlock(&nfs_clid_init_mutex
);
1902 dprintk("NFS: %s: status = %d\n", __func__
, status
);
1906 #ifdef CONFIG_NFS_V4_1
1907 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
1909 struct nfs_client
*clp
= session
->clp
;
1913 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1915 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1916 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1918 nfs4_schedule_lease_recovery(clp
);
1920 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
1922 static void nfs41_ping_server(struct nfs_client
*clp
)
1924 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
1925 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1926 nfs4_schedule_state_manager(clp
);
1929 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
1931 nfs41_ping_server(clp
);
1934 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
1936 nfs41_ping_server(clp
);
1939 static void nfs4_reset_all_state(struct nfs_client
*clp
)
1941 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1942 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1943 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1944 nfs4_state_start_reclaim_nograce(clp
);
1945 dprintk("%s: scheduling reset of all state for server %s!\n",
1946 __func__
, clp
->cl_hostname
);
1947 nfs4_schedule_state_manager(clp
);
1951 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
1953 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1954 nfs4_state_start_reclaim_reboot(clp
);
1955 dprintk("%s: server %s rebooted!\n", __func__
,
1957 nfs4_schedule_state_manager(clp
);
1961 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
1963 nfs4_reset_all_state(clp
);
1964 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
1967 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
1969 /* This will need to handle layouts too */
1970 nfs_expire_all_delegations(clp
);
1971 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
1975 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
1977 nfs_expire_all_delegations(clp
);
1978 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
1979 nfs4_schedule_state_manager(clp
);
1980 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
1984 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
1986 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
1987 &clp
->cl_state
) == 0)
1988 nfs4_schedule_state_manager(clp
);
1991 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
1996 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
1997 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
1999 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2000 nfs41_handle_server_reboot(clp
);
2001 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2002 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2003 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
2004 SEQ4_STATUS_LEASE_MOVED
))
2005 nfs41_handle_state_revoked(clp
);
2006 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2007 nfs41_handle_recallable_state_revoked(clp
);
2008 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2009 nfs41_handle_backchannel_fault(clp
);
2010 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2011 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2012 nfs41_handle_cb_path_down(clp
);
2015 static int nfs4_reset_session(struct nfs_client
*clp
)
2017 struct rpc_cred
*cred
;
2020 if (!nfs4_has_session(clp
))
2022 nfs4_begin_drain_session(clp
);
2023 cred
= nfs4_get_exchange_id_cred(clp
);
2024 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2025 if (status
&& status
!= -NFS4ERR_BADSESSION
&&
2026 status
!= -NFS4ERR_DEADSESSION
) {
2027 status
= nfs4_recovery_handle_error(clp
, status
);
2031 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2032 status
= nfs4_proc_create_session(clp
, cred
);
2034 dprintk("%s: session reset failed with status %d for server %s!\n",
2035 __func__
, status
, clp
->cl_hostname
);
2036 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2039 nfs41_finish_session_reset(clp
);
2040 dprintk("%s: session reset was successful for server %s!\n",
2041 __func__
, clp
->cl_hostname
);
2048 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2050 struct rpc_cred
*cred
;
2053 if (!nfs4_has_session(clp
))
2055 nfs4_begin_drain_session(clp
);
2056 cred
= nfs4_get_exchange_id_cred(clp
);
2057 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2060 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2063 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2064 __func__
, clp
->cl_hostname
);
2066 case -NFS4ERR_DELAY
:
2068 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2071 return nfs4_recovery_handle_error(clp
, ret
);
2075 #else /* CONFIG_NFS_V4_1 */
2076 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2077 static int nfs4_end_drain_session(struct nfs_client
*clp
) { return 0; }
2079 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2083 #endif /* CONFIG_NFS_V4_1 */
2085 static void nfs4_state_manager(struct nfs_client
*clp
)
2088 const char *section
= "", *section_sep
= "";
2090 /* Ensure exclusive access to NFSv4 state */
2092 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2093 section
= "purge state";
2094 status
= nfs4_purge_lease(clp
);
2100 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2101 section
= "lease expired";
2102 /* We're going to have to re-establish a clientid */
2103 status
= nfs4_reclaim_lease(clp
);
2109 /* Initialize or reset the session */
2110 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2111 section
= "reset session";
2112 status
= nfs4_reset_session(clp
);
2113 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2119 /* Send BIND_CONN_TO_SESSION */
2120 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2122 section
= "bind conn to session";
2123 status
= nfs4_bind_conn_to_session(clp
);
2129 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2130 section
= "check lease";
2131 status
= nfs4_check_lease(clp
);
2137 /* First recover reboot state... */
2138 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2139 section
= "reclaim reboot";
2140 status
= nfs4_do_reclaim(clp
,
2141 clp
->cl_mvops
->reboot_recovery_ops
);
2142 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2143 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
2145 nfs4_state_end_reclaim_reboot(clp
);
2146 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
2152 /* Now recover expired state... */
2153 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2154 section
= "reclaim nograce";
2155 status
= nfs4_do_reclaim(clp
,
2156 clp
->cl_mvops
->nograce_recovery_ops
);
2157 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2158 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
2159 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
2165 nfs4_end_drain_session(clp
);
2166 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2167 nfs_client_return_marked_delegations(clp
);
2171 nfs4_clear_state_manager_bit(clp
);
2172 /* Did we race with an attempt to give us more work? */
2173 if (clp
->cl_state
== 0)
2175 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2177 } while (atomic_read(&clp
->cl_count
) > 1);
2180 if (strlen(section
))
2182 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2183 " with error %d\n", section_sep
, section
,
2184 clp
->cl_hostname
, -status
);
2186 nfs4_end_drain_session(clp
);
2187 nfs4_clear_state_manager_bit(clp
);
2190 static int nfs4_run_state_manager(void *ptr
)
2192 struct nfs_client
*clp
= ptr
;
2194 allow_signal(SIGKILL
);
2195 nfs4_state_manager(clp
);
2196 nfs_put_client(clp
);
2197 module_put_and_exit(0);