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 /* Sustain the lease, even if it's empty. If the clientid4
141 * goes stale it's of no use for trunking discovery. */
142 nfs4_schedule_state_renewal(*result
);
148 struct rpc_cred
*nfs4_get_machine_cred_locked(struct nfs_client
*clp
)
150 struct rpc_cred
*cred
= NULL
;
152 if (clp
->cl_machine_cred
!= NULL
)
153 cred
= get_rpccred(clp
->cl_machine_cred
);
157 static struct rpc_cred
*
158 nfs4_get_renew_cred_server_locked(struct nfs_server
*server
)
160 struct rpc_cred
*cred
= NULL
;
161 struct nfs4_state_owner
*sp
;
164 for (pos
= rb_first(&server
->state_owners
);
166 pos
= rb_next(pos
)) {
167 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
168 if (list_empty(&sp
->so_states
))
170 cred
= get_rpccred(sp
->so_cred
);
177 * nfs4_get_renew_cred_locked - Acquire credential for a renew operation
178 * @clp: client state handle
180 * Returns an rpc_cred with reference count bumped, or NULL.
181 * Caller must hold clp->cl_lock.
183 struct rpc_cred
*nfs4_get_renew_cred_locked(struct nfs_client
*clp
)
185 struct rpc_cred
*cred
= NULL
;
186 struct nfs_server
*server
;
188 /* Use machine credentials if available */
189 cred
= nfs4_get_machine_cred_locked(clp
);
194 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
195 cred
= nfs4_get_renew_cred_server_locked(server
);
205 #if defined(CONFIG_NFS_V4_1)
207 static int nfs41_setup_state_renewal(struct nfs_client
*clp
)
210 struct nfs_fsinfo fsinfo
;
212 if (!test_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
)) {
213 nfs4_schedule_state_renewal(clp
);
217 status
= nfs4_proc_get_lease_time(clp
, &fsinfo
);
219 /* Update lease time and schedule renewal */
220 spin_lock(&clp
->cl_lock
);
221 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
222 clp
->cl_last_renewal
= jiffies
;
223 spin_unlock(&clp
->cl_lock
);
225 nfs4_schedule_state_renewal(clp
);
232 * Back channel returns NFS4ERR_DELAY for new requests when
233 * NFS4_SESSION_DRAINING is set so there is no work to be done when draining
236 static void nfs4_end_drain_session(struct nfs_client
*clp
)
238 struct nfs4_session
*ses
= clp
->cl_session
;
239 struct nfs4_slot_table
*tbl
;
243 tbl
= &ses
->fc_slot_table
;
244 if (test_and_clear_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
245 spin_lock(&tbl
->slot_tbl_lock
);
246 nfs41_wake_slot_table(tbl
);
247 spin_unlock(&tbl
->slot_tbl_lock
);
252 * Signal state manager thread if session fore channel is drained
254 void nfs4_session_drain_complete(struct nfs4_session
*session
,
255 struct nfs4_slot_table
*tbl
)
257 if (nfs4_session_draining(session
))
258 complete(&tbl
->complete
);
261 static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table
*tbl
)
263 spin_lock(&tbl
->slot_tbl_lock
);
264 if (tbl
->highest_used_slotid
!= NFS4_NO_SLOT
) {
265 INIT_COMPLETION(tbl
->complete
);
266 spin_unlock(&tbl
->slot_tbl_lock
);
267 return wait_for_completion_interruptible(&tbl
->complete
);
269 spin_unlock(&tbl
->slot_tbl_lock
);
273 static int nfs4_begin_drain_session(struct nfs_client
*clp
)
275 struct nfs4_session
*ses
= clp
->cl_session
;
278 set_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
);
280 ret
= nfs4_wait_on_slot_tbl(&ses
->bc_slot_table
);
284 return nfs4_wait_on_slot_tbl(&ses
->fc_slot_table
);
287 static void nfs41_finish_session_reset(struct nfs_client
*clp
)
289 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
290 clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
291 /* create_session negotiated new slot table */
292 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
293 nfs41_setup_state_renewal(clp
);
296 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
300 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
302 nfs4_begin_drain_session(clp
);
303 status
= nfs4_proc_exchange_id(clp
, cred
);
306 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
308 status
= nfs4_proc_create_session(clp
, cred
);
311 nfs41_finish_session_reset(clp
);
312 nfs_mark_client_ready(clp
, NFS_CS_READY
);
318 * nfs41_discover_server_trunking - Detect server IP address trunking (mv1)
320 * @clp: nfs_client under test
321 * @result: OUT: found nfs_client, or clp
322 * @cred: credential to use for trunking test
324 * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status.
325 * If NFS4_OK is returned, an nfs_client pointer is planted in
328 * Note: The returned client may not yet be marked ready.
330 int nfs41_discover_server_trunking(struct nfs_client
*clp
,
331 struct nfs_client
**result
,
332 struct rpc_cred
*cred
)
336 status
= nfs4_proc_exchange_id(clp
, cred
);
337 if (status
!= NFS4_OK
)
339 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
341 return nfs41_walk_client_list(clp
, result
, cred
);
344 struct rpc_cred
*nfs4_get_exchange_id_cred(struct nfs_client
*clp
)
346 struct rpc_cred
*cred
;
348 spin_lock(&clp
->cl_lock
);
349 cred
= nfs4_get_machine_cred_locked(clp
);
350 spin_unlock(&clp
->cl_lock
);
354 #endif /* CONFIG_NFS_V4_1 */
356 static struct rpc_cred
*
357 nfs4_get_setclientid_cred_server(struct nfs_server
*server
)
359 struct nfs_client
*clp
= server
->nfs_client
;
360 struct rpc_cred
*cred
= NULL
;
361 struct nfs4_state_owner
*sp
;
364 spin_lock(&clp
->cl_lock
);
365 pos
= rb_first(&server
->state_owners
);
367 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
368 cred
= get_rpccred(sp
->so_cred
);
370 spin_unlock(&clp
->cl_lock
);
375 * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation
376 * @clp: client state handle
378 * Returns an rpc_cred with reference count bumped, or NULL.
380 struct rpc_cred
*nfs4_get_setclientid_cred(struct nfs_client
*clp
)
382 struct nfs_server
*server
;
383 struct rpc_cred
*cred
;
385 spin_lock(&clp
->cl_lock
);
386 cred
= nfs4_get_machine_cred_locked(clp
);
387 spin_unlock(&clp
->cl_lock
);
392 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
393 cred
= nfs4_get_setclientid_cred_server(server
);
403 static struct nfs4_state_owner
*
404 nfs4_find_state_owner_locked(struct nfs_server
*server
, struct rpc_cred
*cred
)
406 struct rb_node
**p
= &server
->state_owners
.rb_node
,
408 struct nfs4_state_owner
*sp
;
412 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
414 if (cred
< sp
->so_cred
)
415 p
= &parent
->rb_left
;
416 else if (cred
> sp
->so_cred
)
417 p
= &parent
->rb_right
;
419 if (!list_empty(&sp
->so_lru
))
420 list_del_init(&sp
->so_lru
);
421 atomic_inc(&sp
->so_count
);
428 static struct nfs4_state_owner
*
429 nfs4_insert_state_owner_locked(struct nfs4_state_owner
*new)
431 struct nfs_server
*server
= new->so_server
;
432 struct rb_node
**p
= &server
->state_owners
.rb_node
,
434 struct nfs4_state_owner
*sp
;
439 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
441 if (new->so_cred
< sp
->so_cred
)
442 p
= &parent
->rb_left
;
443 else if (new->so_cred
> sp
->so_cred
)
444 p
= &parent
->rb_right
;
446 if (!list_empty(&sp
->so_lru
))
447 list_del_init(&sp
->so_lru
);
448 atomic_inc(&sp
->so_count
);
452 err
= ida_get_new(&server
->openowner_id
, &new->so_seqid
.owner_id
);
455 rb_link_node(&new->so_server_node
, parent
, p
);
456 rb_insert_color(&new->so_server_node
, &server
->state_owners
);
461 nfs4_remove_state_owner_locked(struct nfs4_state_owner
*sp
)
463 struct nfs_server
*server
= sp
->so_server
;
465 if (!RB_EMPTY_NODE(&sp
->so_server_node
))
466 rb_erase(&sp
->so_server_node
, &server
->state_owners
);
467 ida_remove(&server
->openowner_id
, sp
->so_seqid
.owner_id
);
471 nfs4_init_seqid_counter(struct nfs_seqid_counter
*sc
)
473 sc
->create_time
= ktime_get();
476 spin_lock_init(&sc
->lock
);
477 INIT_LIST_HEAD(&sc
->list
);
478 rpc_init_wait_queue(&sc
->wait
, "Seqid_waitqueue");
482 nfs4_destroy_seqid_counter(struct nfs_seqid_counter
*sc
)
484 rpc_destroy_wait_queue(&sc
->wait
);
488 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
489 * create a new state_owner.
492 static struct nfs4_state_owner
*
493 nfs4_alloc_state_owner(struct nfs_server
*server
,
494 struct rpc_cred
*cred
,
497 struct nfs4_state_owner
*sp
;
499 sp
= kzalloc(sizeof(*sp
), gfp_flags
);
502 sp
->so_server
= server
;
503 sp
->so_cred
= get_rpccred(cred
);
504 spin_lock_init(&sp
->so_lock
);
505 INIT_LIST_HEAD(&sp
->so_states
);
506 nfs4_init_seqid_counter(&sp
->so_seqid
);
507 atomic_set(&sp
->so_count
, 1);
508 INIT_LIST_HEAD(&sp
->so_lru
);
509 seqcount_init(&sp
->so_reclaim_seqcount
);
510 mutex_init(&sp
->so_delegreturn_mutex
);
515 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
517 struct rb_node
*rb_node
= &sp
->so_server_node
;
519 if (!RB_EMPTY_NODE(rb_node
)) {
520 struct nfs_server
*server
= sp
->so_server
;
521 struct nfs_client
*clp
= server
->nfs_client
;
523 spin_lock(&clp
->cl_lock
);
524 if (!RB_EMPTY_NODE(rb_node
)) {
525 rb_erase(rb_node
, &server
->state_owners
);
526 RB_CLEAR_NODE(rb_node
);
528 spin_unlock(&clp
->cl_lock
);
532 static void nfs4_free_state_owner(struct nfs4_state_owner
*sp
)
534 nfs4_destroy_seqid_counter(&sp
->so_seqid
);
535 put_rpccred(sp
->so_cred
);
539 static void nfs4_gc_state_owners(struct nfs_server
*server
)
541 struct nfs_client
*clp
= server
->nfs_client
;
542 struct nfs4_state_owner
*sp
, *tmp
;
543 unsigned long time_min
, time_max
;
546 spin_lock(&clp
->cl_lock
);
548 time_min
= (long)time_max
- (long)clp
->cl_lease_time
;
549 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
550 /* NB: LRU is sorted so that oldest is at the head */
551 if (time_in_range(sp
->so_expires
, time_min
, time_max
))
553 list_move(&sp
->so_lru
, &doomed
);
554 nfs4_remove_state_owner_locked(sp
);
556 spin_unlock(&clp
->cl_lock
);
558 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
559 list_del(&sp
->so_lru
);
560 nfs4_free_state_owner(sp
);
565 * nfs4_get_state_owner - Look up a state owner given a credential
566 * @server: nfs_server to search
567 * @cred: RPC credential to match
569 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
571 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
,
572 struct rpc_cred
*cred
,
575 struct nfs_client
*clp
= server
->nfs_client
;
576 struct nfs4_state_owner
*sp
, *new;
578 spin_lock(&clp
->cl_lock
);
579 sp
= nfs4_find_state_owner_locked(server
, cred
);
580 spin_unlock(&clp
->cl_lock
);
583 new = nfs4_alloc_state_owner(server
, cred
, gfp_flags
);
587 if (ida_pre_get(&server
->openowner_id
, gfp_flags
) == 0)
589 spin_lock(&clp
->cl_lock
);
590 sp
= nfs4_insert_state_owner_locked(new);
591 spin_unlock(&clp
->cl_lock
);
592 } while (sp
== ERR_PTR(-EAGAIN
));
594 nfs4_free_state_owner(new);
596 nfs4_gc_state_owners(server
);
601 * nfs4_put_state_owner - Release a nfs4_state_owner
602 * @sp: state owner data to release
604 * Note that we keep released state owners on an LRU
606 * This caches valid state owners so that they can be
607 * reused, to avoid the OPEN_CONFIRM on minor version 0.
608 * It also pins the uniquifier of dropped state owners for
609 * a while, to ensure that those state owner names are
612 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
614 struct nfs_server
*server
= sp
->so_server
;
615 struct nfs_client
*clp
= server
->nfs_client
;
617 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
620 sp
->so_expires
= jiffies
;
621 list_add_tail(&sp
->so_lru
, &server
->state_owners_lru
);
622 spin_unlock(&clp
->cl_lock
);
626 * nfs4_purge_state_owners - Release all cached state owners
627 * @server: nfs_server with cached state owners to release
629 * Called at umount time. Remaining state owners will be on
630 * the LRU with ref count of zero.
632 void nfs4_purge_state_owners(struct nfs_server
*server
)
634 struct nfs_client
*clp
= server
->nfs_client
;
635 struct nfs4_state_owner
*sp
, *tmp
;
638 spin_lock(&clp
->cl_lock
);
639 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
640 list_move(&sp
->so_lru
, &doomed
);
641 nfs4_remove_state_owner_locked(sp
);
643 spin_unlock(&clp
->cl_lock
);
645 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
646 list_del(&sp
->so_lru
);
647 nfs4_free_state_owner(sp
);
651 static struct nfs4_state
*
652 nfs4_alloc_open_state(void)
654 struct nfs4_state
*state
;
656 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
659 atomic_set(&state
->count
, 1);
660 INIT_LIST_HEAD(&state
->lock_states
);
661 spin_lock_init(&state
->state_lock
);
662 seqlock_init(&state
->seqlock
);
667 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
669 if (state
->state
== fmode
)
671 /* NB! List reordering - see the reclaim code for why. */
672 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
673 if (fmode
& FMODE_WRITE
)
674 list_move(&state
->open_states
, &state
->owner
->so_states
);
676 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
678 state
->state
= fmode
;
681 static struct nfs4_state
*
682 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
684 struct nfs_inode
*nfsi
= NFS_I(inode
);
685 struct nfs4_state
*state
;
687 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
688 if (state
->owner
!= owner
)
690 if (!nfs4_valid_open_stateid(state
))
692 if (atomic_inc_not_zero(&state
->count
))
699 nfs4_free_open_state(struct nfs4_state
*state
)
705 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
707 struct nfs4_state
*state
, *new;
708 struct nfs_inode
*nfsi
= NFS_I(inode
);
710 spin_lock(&inode
->i_lock
);
711 state
= __nfs4_find_state_byowner(inode
, owner
);
712 spin_unlock(&inode
->i_lock
);
715 new = nfs4_alloc_open_state();
716 spin_lock(&owner
->so_lock
);
717 spin_lock(&inode
->i_lock
);
718 state
= __nfs4_find_state_byowner(inode
, owner
);
719 if (state
== NULL
&& new != NULL
) {
721 state
->owner
= owner
;
722 atomic_inc(&owner
->so_count
);
723 list_add(&state
->inode_states
, &nfsi
->open_states
);
725 state
->inode
= inode
;
726 spin_unlock(&inode
->i_lock
);
727 /* Note: The reclaim code dictates that we add stateless
728 * and read-only stateids to the end of the list */
729 list_add_tail(&state
->open_states
, &owner
->so_states
);
730 spin_unlock(&owner
->so_lock
);
732 spin_unlock(&inode
->i_lock
);
733 spin_unlock(&owner
->so_lock
);
735 nfs4_free_open_state(new);
741 void nfs4_put_open_state(struct nfs4_state
*state
)
743 struct inode
*inode
= state
->inode
;
744 struct nfs4_state_owner
*owner
= state
->owner
;
746 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
748 spin_lock(&inode
->i_lock
);
749 list_del(&state
->inode_states
);
750 list_del(&state
->open_states
);
751 spin_unlock(&inode
->i_lock
);
752 spin_unlock(&owner
->so_lock
);
754 nfs4_free_open_state(state
);
755 nfs4_put_state_owner(owner
);
759 * Close the current file.
761 static void __nfs4_close(struct nfs4_state
*state
,
762 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
764 struct nfs4_state_owner
*owner
= state
->owner
;
768 atomic_inc(&owner
->so_count
);
769 /* Protect against nfs4_find_state() */
770 spin_lock(&owner
->so_lock
);
771 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
778 case FMODE_READ
|FMODE_WRITE
:
781 newstate
= FMODE_READ
|FMODE_WRITE
;
782 if (state
->n_rdwr
== 0) {
783 if (state
->n_rdonly
== 0) {
784 newstate
&= ~FMODE_READ
;
785 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
786 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
788 if (state
->n_wronly
== 0) {
789 newstate
&= ~FMODE_WRITE
;
790 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
791 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
794 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
796 nfs4_state_set_mode_locked(state
, newstate
);
797 spin_unlock(&owner
->so_lock
);
800 nfs4_put_open_state(state
);
801 nfs4_put_state_owner(owner
);
803 nfs4_do_close(state
, gfp_mask
, wait
);
806 void nfs4_close_state(struct nfs4_state
*state
, fmode_t fmode
)
808 __nfs4_close(state
, fmode
, GFP_NOFS
, 0);
811 void nfs4_close_sync(struct nfs4_state
*state
, fmode_t fmode
)
813 __nfs4_close(state
, fmode
, GFP_KERNEL
, 1);
817 * Search the state->lock_states for an existing lock_owner
818 * that is compatible with current->files
820 static struct nfs4_lock_state
*
821 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
823 struct nfs4_lock_state
*pos
;
824 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
825 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
827 switch (pos
->ls_owner
.lo_type
) {
828 case NFS4_POSIX_LOCK_TYPE
:
829 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
832 case NFS4_FLOCK_LOCK_TYPE
:
833 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
836 atomic_inc(&pos
->ls_count
);
843 * Return a compatible lock_state. If no initialized lock_state structure
844 * exists, return an uninitialized one.
847 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
)
849 struct nfs4_lock_state
*lsp
;
850 struct nfs_server
*server
= state
->owner
->so_server
;
852 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
855 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
856 atomic_set(&lsp
->ls_count
, 1);
857 lsp
->ls_state
= state
;
858 lsp
->ls_owner
.lo_type
= type
;
859 switch (lsp
->ls_owner
.lo_type
) {
860 case NFS4_FLOCK_LOCK_TYPE
:
861 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
863 case NFS4_POSIX_LOCK_TYPE
:
864 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
869 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
870 if (lsp
->ls_seqid
.owner_id
< 0)
872 INIT_LIST_HEAD(&lsp
->ls_locks
);
879 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
881 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
882 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
887 * Return a compatible lock_state. If no initialized lock_state structure
888 * exists, return an uninitialized one.
891 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
893 struct nfs4_lock_state
*lsp
, *new = NULL
;
896 spin_lock(&state
->state_lock
);
897 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
901 list_add(&new->ls_locks
, &state
->lock_states
);
902 set_bit(LK_STATE_IN_USE
, &state
->flags
);
907 spin_unlock(&state
->state_lock
);
908 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
912 spin_unlock(&state
->state_lock
);
914 nfs4_free_lock_state(state
->owner
->so_server
, new);
919 * Release reference to lock_state, and free it if we see that
920 * it is no longer in use
922 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
924 struct nfs_server
*server
;
925 struct nfs4_state
*state
;
929 state
= lsp
->ls_state
;
930 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
932 list_del(&lsp
->ls_locks
);
933 if (list_empty(&state
->lock_states
))
934 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
935 spin_unlock(&state
->state_lock
);
936 server
= state
->owner
->so_server
;
937 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
938 struct nfs_client
*clp
= server
->nfs_client
;
940 clp
->cl_mvops
->free_lock_state(server
, lsp
);
942 nfs4_free_lock_state(server
, lsp
);
945 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
947 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
949 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
950 atomic_inc(&lsp
->ls_count
);
953 static void nfs4_fl_release_lock(struct file_lock
*fl
)
955 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
958 static const struct file_lock_operations nfs4_fl_lock_ops
= {
959 .fl_copy_lock
= nfs4_fl_copy_lock
,
960 .fl_release_private
= nfs4_fl_release_lock
,
963 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
965 struct nfs4_lock_state
*lsp
;
967 if (fl
->fl_ops
!= NULL
)
969 if (fl
->fl_flags
& FL_POSIX
)
970 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
971 else if (fl
->fl_flags
& FL_FLOCK
)
972 lsp
= nfs4_get_lock_state(state
, NULL
, fl
->fl_pid
,
973 NFS4_FLOCK_LOCK_TYPE
);
978 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
979 fl
->fl_ops
= &nfs4_fl_lock_ops
;
983 static int nfs4_copy_lock_stateid(nfs4_stateid
*dst
,
984 struct nfs4_state
*state
,
985 const struct nfs_lockowner
*lockowner
)
987 struct nfs4_lock_state
*lsp
;
993 if (lockowner
== NULL
)
996 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
999 fl_owner
= lockowner
->l_owner
;
1000 fl_pid
= lockowner
->l_pid
;
1001 spin_lock(&state
->state_lock
);
1002 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
1003 if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
1004 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
1007 if (!list_empty(&lsp
->ls_seqid
.list
))
1010 spin_unlock(&state
->state_lock
);
1011 nfs4_put_lock_state(lsp
);
1016 static int nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
1018 const nfs4_stateid
*src
;
1023 src
= &zero_stateid
;
1024 seq
= read_seqbegin(&state
->seqlock
);
1025 if (test_bit(NFS_OPEN_STATE
, &state
->flags
))
1026 src
= &state
->open_stateid
;
1027 nfs4_stateid_copy(dst
, src
);
1030 if (!list_empty(&state
->owner
->so_seqid
.list
))
1032 } while (read_seqretry(&state
->seqlock
, seq
));
1037 * Byte-range lock aware utility to initialize the stateid of read/write
1040 int nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
1041 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
1044 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
))
1046 ret
= nfs4_copy_lock_stateid(dst
, state
, lockowner
);
1049 ret
= nfs4_copy_open_stateid(dst
, state
);
1051 if (nfs_server_capable(state
->inode
, NFS_CAP_STATEID_NFSV41
))
1056 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1058 struct nfs_seqid
*new;
1060 new = kmalloc(sizeof(*new), gfp_mask
);
1062 new->sequence
= counter
;
1063 INIT_LIST_HEAD(&new->list
);
1069 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1071 struct nfs_seqid_counter
*sequence
;
1073 if (list_empty(&seqid
->list
))
1075 sequence
= seqid
->sequence
;
1076 spin_lock(&sequence
->lock
);
1077 list_del_init(&seqid
->list
);
1078 if (!list_empty(&sequence
->list
)) {
1079 struct nfs_seqid
*next
;
1081 next
= list_first_entry(&sequence
->list
,
1082 struct nfs_seqid
, list
);
1083 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1085 spin_unlock(&sequence
->lock
);
1088 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1090 nfs_release_seqid(seqid
);
1095 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1096 * failed with a seqid incrementing error -
1097 * see comments nfs_fs.h:seqid_mutating_error()
1099 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1104 case -NFS4ERR_BAD_SEQID
:
1105 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1107 pr_warn_ratelimited("NFS: v4 server returned a bad"
1108 " sequence-id error on an"
1109 " unconfirmed sequence %p!\n",
1111 case -NFS4ERR_STALE_CLIENTID
:
1112 case -NFS4ERR_STALE_STATEID
:
1113 case -NFS4ERR_BAD_STATEID
:
1114 case -NFS4ERR_BADXDR
:
1115 case -NFS4ERR_RESOURCE
:
1116 case -NFS4ERR_NOFILEHANDLE
:
1117 /* Non-seqid mutating errors */
1121 * Note: no locking needed as we are guaranteed to be first
1122 * on the sequence list
1124 seqid
->sequence
->counter
++;
1127 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1129 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1130 struct nfs4_state_owner
, so_seqid
);
1131 struct nfs_server
*server
= sp
->so_server
;
1133 if (status
== -NFS4ERR_BAD_SEQID
)
1134 nfs4_drop_state_owner(sp
);
1135 if (!nfs4_has_session(server
->nfs_client
))
1136 nfs_increment_seqid(status
, seqid
);
1140 * Increment the seqid if the LOCK/LOCKU succeeded, or
1141 * failed with a seqid incrementing error -
1142 * see comments nfs_fs.h:seqid_mutating_error()
1144 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1146 nfs_increment_seqid(status
, seqid
);
1149 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1151 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1154 spin_lock(&sequence
->lock
);
1156 if (list_empty(&seqid
->list
))
1157 list_add_tail(&seqid
->list
, &sequence
->list
);
1158 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1160 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1163 spin_unlock(&sequence
->lock
);
1167 static int nfs4_run_state_manager(void *);
1169 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1171 smp_mb__before_clear_bit();
1172 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1173 smp_mb__after_clear_bit();
1174 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1175 rpc_wake_up(&clp
->cl_rpcwaitq
);
1179 * Schedule the nfs_client asynchronous state management routine
1181 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1183 struct task_struct
*task
;
1184 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1186 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1188 __module_get(THIS_MODULE
);
1189 atomic_inc(&clp
->cl_count
);
1191 /* The rcu_read_lock() is not strictly necessary, as the state
1192 * manager is the only thread that ever changes the rpc_xprt
1193 * after it's initialized. At this point, we're single threaded. */
1195 snprintf(buf
, sizeof(buf
), "%s-manager",
1196 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1198 task
= kthread_run(nfs4_run_state_manager
, clp
, buf
);
1200 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1201 __func__
, PTR_ERR(task
));
1202 nfs4_clear_state_manager_bit(clp
);
1203 nfs_put_client(clp
);
1204 module_put(THIS_MODULE
);
1209 * Schedule a lease recovery attempt
1211 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1215 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1216 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1217 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1219 nfs4_schedule_state_manager(clp
);
1221 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1223 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1229 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1230 nfs_wait_bit_killable
, TASK_KILLABLE
);
1234 if (clp
->cl_cons_state
< 0)
1235 return clp
->cl_cons_state
;
1239 int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1244 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1245 ret
= nfs4_wait_clnt_recover(clp
);
1248 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1249 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1251 nfs4_schedule_state_manager(clp
);
1258 * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
1259 * @clp: client to process
1261 * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a
1262 * resend of the SETCLIENTID and hence re-establish the
1263 * callback channel. Then return all existing delegations.
1265 static void nfs40_handle_cb_pathdown(struct nfs_client
*clp
)
1267 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1268 nfs_expire_all_delegations(clp
);
1269 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__
,
1273 void nfs4_schedule_path_down_recovery(struct nfs_client
*clp
)
1275 nfs40_handle_cb_pathdown(clp
);
1276 nfs4_schedule_state_manager(clp
);
1279 static int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
1282 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1283 /* Don't recover state that expired before the reboot */
1284 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
1285 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1288 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
1289 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1293 static int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
1295 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
1296 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1297 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
1298 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
1302 int nfs4_schedule_stateid_recovery(const struct nfs_server
*server
, struct nfs4_state
*state
)
1304 struct nfs_client
*clp
= server
->nfs_client
;
1306 if (!nfs4_valid_open_stateid(state
))
1308 nfs4_state_mark_reclaim_nograce(clp
, state
);
1309 dprintk("%s: scheduling stateid recovery for server %s\n", __func__
,
1311 nfs4_schedule_state_manager(clp
);
1314 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery
);
1316 void nfs_inode_find_state_and_recover(struct inode
*inode
,
1317 const nfs4_stateid
*stateid
)
1319 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1320 struct nfs_inode
*nfsi
= NFS_I(inode
);
1321 struct nfs_open_context
*ctx
;
1322 struct nfs4_state
*state
;
1325 spin_lock(&inode
->i_lock
);
1326 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1330 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
1332 if (!nfs4_stateid_match(&state
->stateid
, stateid
))
1334 nfs4_state_mark_reclaim_nograce(clp
, state
);
1337 spin_unlock(&inode
->i_lock
);
1339 nfs4_schedule_state_manager(clp
);
1342 static void nfs4_state_mark_open_context_bad(struct nfs4_state
*state
)
1344 struct inode
*inode
= state
->inode
;
1345 struct nfs_inode
*nfsi
= NFS_I(inode
);
1346 struct nfs_open_context
*ctx
;
1348 spin_lock(&inode
->i_lock
);
1349 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1350 if (ctx
->state
!= state
)
1352 set_bit(NFS_CONTEXT_BAD
, &ctx
->flags
);
1354 spin_unlock(&inode
->i_lock
);
1357 static void nfs4_state_mark_recovery_failed(struct nfs4_state
*state
, int error
)
1359 set_bit(NFS_STATE_RECOVERY_FAILED
, &state
->flags
);
1360 nfs4_state_mark_open_context_bad(state
);
1364 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
1366 struct inode
*inode
= state
->inode
;
1367 struct nfs_inode
*nfsi
= NFS_I(inode
);
1368 struct file_lock
*fl
;
1371 if (inode
->i_flock
== NULL
)
1374 /* Guard against delegation returns and new lock/unlock calls */
1375 down_write(&nfsi
->rwsem
);
1376 /* Protect inode->i_flock using the BKL */
1378 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
1379 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
1381 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1384 status
= ops
->recover_lock(state
, fl
);
1389 case -NFS4ERR_ADMIN_REVOKED
:
1390 case -NFS4ERR_STALE_STATEID
:
1391 case -NFS4ERR_BAD_STATEID
:
1392 case -NFS4ERR_EXPIRED
:
1393 case -NFS4ERR_NO_GRACE
:
1394 case -NFS4ERR_STALE_CLIENTID
:
1395 case -NFS4ERR_BADSESSION
:
1396 case -NFS4ERR_BADSLOT
:
1397 case -NFS4ERR_BAD_HIGH_SLOT
:
1398 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1401 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1402 "Zeroing state\n", __func__
, status
);
1404 case -NFS4ERR_DENIED
:
1405 case -NFS4ERR_RECLAIM_BAD
:
1406 case -NFS4ERR_RECLAIM_CONFLICT
:
1407 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1414 up_write(&nfsi
->rwsem
);
1418 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1420 struct nfs4_state
*state
;
1421 struct nfs4_lock_state
*lock
;
1424 /* Note: we rely on the sp->so_states list being ordered
1425 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1427 * This is needed to ensure that the server won't give us any
1428 * read delegations that we have to return if, say, we are
1429 * recovering after a network partition or a reboot from a
1430 * server that doesn't support a grace period.
1432 spin_lock(&sp
->so_lock
);
1433 write_seqcount_begin(&sp
->so_reclaim_seqcount
);
1435 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1436 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1438 if (!nfs4_valid_open_stateid(state
))
1440 if (state
->state
== 0)
1442 atomic_inc(&state
->count
);
1443 spin_unlock(&sp
->so_lock
);
1444 status
= ops
->recover_open(sp
, state
);
1446 status
= nfs4_reclaim_locks(state
, ops
);
1448 spin_lock(&state
->state_lock
);
1449 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1450 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1451 pr_warn_ratelimited("NFS: "
1453 "failed!\n", __func__
);
1455 spin_unlock(&state
->state_lock
);
1456 nfs4_put_open_state(state
);
1457 spin_lock(&sp
->so_lock
);
1463 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1464 "Zeroing state\n", __func__
, status
);
1469 * Open state on this file cannot be recovered
1470 * All we can do is revert to using the zero stateid.
1472 nfs4_state_mark_recovery_failed(state
, status
);
1476 case -NFS4ERR_ADMIN_REVOKED
:
1477 case -NFS4ERR_STALE_STATEID
:
1478 case -NFS4ERR_BAD_STATEID
:
1479 case -NFS4ERR_RECLAIM_BAD
:
1480 case -NFS4ERR_RECLAIM_CONFLICT
:
1481 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1483 case -NFS4ERR_EXPIRED
:
1484 case -NFS4ERR_NO_GRACE
:
1485 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1486 case -NFS4ERR_STALE_CLIENTID
:
1487 case -NFS4ERR_BADSESSION
:
1488 case -NFS4ERR_BADSLOT
:
1489 case -NFS4ERR_BAD_HIGH_SLOT
:
1490 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1493 nfs4_put_open_state(state
);
1494 spin_lock(&sp
->so_lock
);
1497 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1498 spin_unlock(&sp
->so_lock
);
1501 nfs4_put_open_state(state
);
1502 spin_lock(&sp
->so_lock
);
1503 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1504 spin_unlock(&sp
->so_lock
);
1508 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1510 struct nfs4_lock_state
*lock
;
1512 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1513 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1514 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1515 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1516 spin_lock(&state
->state_lock
);
1517 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1518 lock
->ls_seqid
.flags
= 0;
1519 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1521 spin_unlock(&state
->state_lock
);
1524 static void nfs4_reset_seqids(struct nfs_server
*server
,
1525 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1527 struct nfs_client
*clp
= server
->nfs_client
;
1528 struct nfs4_state_owner
*sp
;
1529 struct rb_node
*pos
;
1530 struct nfs4_state
*state
;
1532 spin_lock(&clp
->cl_lock
);
1533 for (pos
= rb_first(&server
->state_owners
);
1535 pos
= rb_next(pos
)) {
1536 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1537 sp
->so_seqid
.flags
= 0;
1538 spin_lock(&sp
->so_lock
);
1539 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1540 if (mark_reclaim(clp
, state
))
1541 nfs4_clear_open_state(state
);
1543 spin_unlock(&sp
->so_lock
);
1545 spin_unlock(&clp
->cl_lock
);
1548 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1549 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1551 struct nfs_server
*server
;
1554 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1555 nfs4_reset_seqids(server
, mark_reclaim
);
1559 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1561 /* Mark all delegations for reclaim */
1562 nfs_delegation_mark_reclaim(clp
);
1563 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1566 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1567 const struct nfs4_state_recovery_ops
*ops
)
1569 /* Notify the server we're done reclaiming our state */
1570 if (ops
->reclaim_complete
)
1571 (void)ops
->reclaim_complete(clp
);
1574 static void nfs4_clear_reclaim_server(struct nfs_server
*server
)
1576 struct nfs_client
*clp
= server
->nfs_client
;
1577 struct nfs4_state_owner
*sp
;
1578 struct rb_node
*pos
;
1579 struct nfs4_state
*state
;
1581 spin_lock(&clp
->cl_lock
);
1582 for (pos
= rb_first(&server
->state_owners
);
1584 pos
= rb_next(pos
)) {
1585 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1586 spin_lock(&sp
->so_lock
);
1587 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1588 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
,
1591 nfs4_state_mark_reclaim_nograce(clp
, state
);
1593 spin_unlock(&sp
->so_lock
);
1595 spin_unlock(&clp
->cl_lock
);
1598 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1600 struct nfs_server
*server
;
1602 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1606 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1607 nfs4_clear_reclaim_server(server
);
1610 nfs_delegation_reap_unclaimed(clp
);
1614 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1616 if (!nfs4_state_clear_reclaim_reboot(clp
))
1618 nfs4_reclaim_complete(clp
, clp
->cl_mvops
->reboot_recovery_ops
);
1621 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1623 nfs_delegation_mark_reclaim(clp
);
1624 nfs_delegation_reap_unclaimed(clp
);
1627 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1629 nfs_delegation_clear_all(clp
);
1630 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1633 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1638 case -NFS4ERR_CB_PATH_DOWN
:
1639 nfs40_handle_cb_pathdown(clp
);
1641 case -NFS4ERR_NO_GRACE
:
1642 nfs4_state_end_reclaim_reboot(clp
);
1644 case -NFS4ERR_STALE_CLIENTID
:
1645 case -NFS4ERR_LEASE_MOVED
:
1646 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1647 nfs4_state_clear_reclaim_reboot(clp
);
1648 nfs4_state_start_reclaim_reboot(clp
);
1650 case -NFS4ERR_EXPIRED
:
1651 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1652 nfs4_state_start_reclaim_nograce(clp
);
1654 case -NFS4ERR_BADSESSION
:
1655 case -NFS4ERR_BADSLOT
:
1656 case -NFS4ERR_BAD_HIGH_SLOT
:
1657 case -NFS4ERR_DEADSESSION
:
1658 case -NFS4ERR_SEQ_FALSE_RETRY
:
1659 case -NFS4ERR_SEQ_MISORDERED
:
1660 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1661 /* Zero session reset errors */
1663 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1664 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1667 dprintk("%s: failed to handle error %d for server %s\n",
1668 __func__
, error
, clp
->cl_hostname
);
1671 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1676 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1678 struct nfs4_state_owner
*sp
;
1679 struct nfs_server
*server
;
1680 struct rb_node
*pos
;
1685 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1686 nfs4_purge_state_owners(server
);
1687 spin_lock(&clp
->cl_lock
);
1688 for (pos
= rb_first(&server
->state_owners
);
1690 pos
= rb_next(pos
)) {
1692 struct nfs4_state_owner
, so_server_node
);
1693 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1696 atomic_inc(&sp
->so_count
);
1697 spin_unlock(&clp
->cl_lock
);
1700 status
= nfs4_reclaim_open_state(sp
, ops
);
1702 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1703 nfs4_put_state_owner(sp
);
1704 return nfs4_recovery_handle_error(clp
, status
);
1707 nfs4_put_state_owner(sp
);
1710 spin_unlock(&clp
->cl_lock
);
1716 static int nfs4_check_lease(struct nfs_client
*clp
)
1718 struct rpc_cred
*cred
;
1719 const struct nfs4_state_maintenance_ops
*ops
=
1720 clp
->cl_mvops
->state_renewal_ops
;
1723 /* Is the client already known to have an expired lease? */
1724 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1726 spin_lock(&clp
->cl_lock
);
1727 cred
= ops
->get_state_renewal_cred_locked(clp
);
1728 spin_unlock(&clp
->cl_lock
);
1730 cred
= nfs4_get_setclientid_cred(clp
);
1735 status
= ops
->renew_lease(clp
, cred
);
1737 if (status
== -ETIMEDOUT
) {
1738 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1742 return nfs4_recovery_handle_error(clp
, status
);
1745 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1746 * and for recoverable errors on EXCHANGE_ID for v4.1
1748 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1751 case -NFS4ERR_SEQ_MISORDERED
:
1752 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1753 return -ESERVERFAULT
;
1754 /* Lease confirmation error: retry after purging the lease */
1756 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1758 case -NFS4ERR_STALE_CLIENTID
:
1759 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1760 nfs4_state_clear_reclaim_reboot(clp
);
1761 nfs4_state_start_reclaim_reboot(clp
);
1763 case -NFS4ERR_CLID_INUSE
:
1764 pr_err("NFS: Server %s reports our clientid is in use\n",
1766 nfs_mark_client_ready(clp
, -EPERM
);
1767 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1770 case -NFS4ERR_DELAY
:
1776 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1777 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1778 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1779 dprintk("%s: exit with error %d for server %s\n",
1780 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1781 return -EPROTONOSUPPORT
;
1782 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1783 * in nfs4_exchange_id */
1785 dprintk("%s: exit with error %d for server %s\n", __func__
,
1786 status
, clp
->cl_hostname
);
1789 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1790 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1795 static int nfs4_establish_lease(struct nfs_client
*clp
)
1797 struct rpc_cred
*cred
;
1798 const struct nfs4_state_recovery_ops
*ops
=
1799 clp
->cl_mvops
->reboot_recovery_ops
;
1802 cred
= ops
->get_clid_cred(clp
);
1805 status
= ops
->establish_clid(clp
, cred
);
1809 pnfs_destroy_all_layouts(clp
);
1814 * Returns zero or a negative errno. NFS4ERR values are converted
1815 * to local errno values.
1817 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1821 status
= nfs4_establish_lease(clp
);
1823 return nfs4_handle_reclaim_lease_error(clp
, status
);
1824 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1825 nfs4_state_start_reclaim_nograce(clp
);
1826 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1827 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1828 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1829 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1833 static int nfs4_purge_lease(struct nfs_client
*clp
)
1837 status
= nfs4_establish_lease(clp
);
1839 return nfs4_handle_reclaim_lease_error(clp
, status
);
1840 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1841 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1842 nfs4_state_start_reclaim_nograce(clp
);
1847 * nfs4_discover_server_trunking - Detect server IP address trunking
1849 * @clp: nfs_client under test
1850 * @result: OUT: found nfs_client, or clp
1852 * Returns zero or a negative errno. If zero is returned,
1853 * an nfs_client pointer is planted in "result".
1855 * Note: since we are invoked in process context, and
1856 * not from inside the state manager, we cannot use
1857 * nfs4_handle_reclaim_lease_error().
1859 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
1860 struct nfs_client
**result
)
1862 const struct nfs4_state_recovery_ops
*ops
=
1863 clp
->cl_mvops
->reboot_recovery_ops
;
1864 struct rpc_clnt
*clnt
;
1865 struct rpc_cred
*cred
;
1868 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
1870 clnt
= clp
->cl_rpcclient
;
1873 mutex_lock(&nfs_clid_init_mutex
);
1876 cred
= ops
->get_clid_cred(clp
);
1880 status
= ops
->detect_trunking(clp
, result
, cred
);
1885 case -NFS4ERR_DELAY
:
1889 case -NFS4ERR_STALE_CLIENTID
:
1890 dprintk("NFS: %s after status %d, retrying\n",
1896 case -NFS4ERR_CLID_INUSE
:
1897 case -NFS4ERR_WRONGSEC
:
1898 clnt
= rpc_clone_client_set_auth(clnt
, RPC_AUTH_UNIX
);
1900 status
= PTR_ERR(clnt
);
1903 /* Note: this is safe because we haven't yet marked the
1904 * client as ready, so we are the only user of
1907 clnt
= xchg(&clp
->cl_rpcclient
, clnt
);
1908 rpc_shutdown_client(clnt
);
1909 clnt
= clp
->cl_rpcclient
;
1912 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1913 status
= -EPROTONOSUPPORT
;
1917 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1918 * in nfs4_exchange_id */
1919 status
= -EKEYEXPIRED
;
1922 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
1928 mutex_unlock(&nfs_clid_init_mutex
);
1929 dprintk("NFS: %s: status = %d\n", __func__
, status
);
1933 #ifdef CONFIG_NFS_V4_1
1934 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
1936 struct nfs_client
*clp
= session
->clp
;
1940 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1942 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1943 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1945 nfs4_schedule_lease_recovery(clp
);
1947 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
1949 static void nfs41_ping_server(struct nfs_client
*clp
)
1951 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
1952 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1953 nfs4_schedule_state_manager(clp
);
1956 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
1958 nfs41_ping_server(clp
);
1961 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
1963 nfs41_ping_server(clp
);
1966 static void nfs4_reset_all_state(struct nfs_client
*clp
)
1968 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1969 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1970 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1971 nfs4_state_start_reclaim_nograce(clp
);
1972 dprintk("%s: scheduling reset of all state for server %s!\n",
1973 __func__
, clp
->cl_hostname
);
1974 nfs4_schedule_state_manager(clp
);
1978 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
1980 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1981 nfs4_state_start_reclaim_reboot(clp
);
1982 dprintk("%s: server %s rebooted!\n", __func__
,
1984 nfs4_schedule_state_manager(clp
);
1988 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
1990 nfs4_reset_all_state(clp
);
1991 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
1994 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
1996 /* This will need to handle layouts too */
1997 nfs_expire_all_delegations(clp
);
1998 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
2002 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
2004 nfs_expire_all_delegations(clp
);
2005 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
2006 nfs4_schedule_state_manager(clp
);
2007 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
2011 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
2013 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2014 &clp
->cl_state
) == 0)
2015 nfs4_schedule_state_manager(clp
);
2018 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
2023 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2024 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
2026 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2027 nfs41_handle_server_reboot(clp
);
2028 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2029 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2030 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
2031 SEQ4_STATUS_LEASE_MOVED
))
2032 nfs41_handle_state_revoked(clp
);
2033 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2034 nfs41_handle_recallable_state_revoked(clp
);
2035 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2036 nfs41_handle_backchannel_fault(clp
);
2037 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2038 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2039 nfs41_handle_cb_path_down(clp
);
2042 static int nfs4_reset_session(struct nfs_client
*clp
)
2044 struct rpc_cred
*cred
;
2047 if (!nfs4_has_session(clp
))
2049 nfs4_begin_drain_session(clp
);
2050 cred
= nfs4_get_exchange_id_cred(clp
);
2051 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2054 case -NFS4ERR_BADSESSION
:
2055 case -NFS4ERR_DEADSESSION
:
2057 case -NFS4ERR_BACK_CHAN_BUSY
:
2058 case -NFS4ERR_DELAY
:
2059 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2064 status
= nfs4_recovery_handle_error(clp
, status
);
2068 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2069 status
= nfs4_proc_create_session(clp
, cred
);
2071 dprintk("%s: session reset failed with status %d for server %s!\n",
2072 __func__
, status
, clp
->cl_hostname
);
2073 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2076 nfs41_finish_session_reset(clp
);
2077 dprintk("%s: session reset was successful for server %s!\n",
2078 __func__
, clp
->cl_hostname
);
2085 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2087 struct rpc_cred
*cred
;
2090 if (!nfs4_has_session(clp
))
2092 nfs4_begin_drain_session(clp
);
2093 cred
= nfs4_get_exchange_id_cred(clp
);
2094 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2097 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2100 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2101 __func__
, clp
->cl_hostname
);
2103 case -NFS4ERR_DELAY
:
2105 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2108 return nfs4_recovery_handle_error(clp
, ret
);
2112 #else /* CONFIG_NFS_V4_1 */
2113 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2114 static int nfs4_end_drain_session(struct nfs_client
*clp
) { return 0; }
2116 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2120 #endif /* CONFIG_NFS_V4_1 */
2122 static void nfs4_state_manager(struct nfs_client
*clp
)
2125 const char *section
= "", *section_sep
= "";
2127 /* Ensure exclusive access to NFSv4 state */
2129 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2130 section
= "purge state";
2131 status
= nfs4_purge_lease(clp
);
2137 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2138 section
= "lease expired";
2139 /* We're going to have to re-establish a clientid */
2140 status
= nfs4_reclaim_lease(clp
);
2146 /* Initialize or reset the session */
2147 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2148 section
= "reset session";
2149 status
= nfs4_reset_session(clp
);
2150 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2156 /* Send BIND_CONN_TO_SESSION */
2157 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2159 section
= "bind conn to session";
2160 status
= nfs4_bind_conn_to_session(clp
);
2166 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2167 section
= "check lease";
2168 status
= nfs4_check_lease(clp
);
2174 /* First recover reboot state... */
2175 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2176 section
= "reclaim reboot";
2177 status
= nfs4_do_reclaim(clp
,
2178 clp
->cl_mvops
->reboot_recovery_ops
);
2179 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2180 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
2182 nfs4_state_end_reclaim_reboot(clp
);
2183 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
2189 /* Now recover expired state... */
2190 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2191 section
= "reclaim nograce";
2192 status
= nfs4_do_reclaim(clp
,
2193 clp
->cl_mvops
->nograce_recovery_ops
);
2194 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2195 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
2196 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
2202 nfs4_end_drain_session(clp
);
2203 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2204 nfs_client_return_marked_delegations(clp
);
2208 nfs4_clear_state_manager_bit(clp
);
2209 /* Did we race with an attempt to give us more work? */
2210 if (clp
->cl_state
== 0)
2212 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2214 } while (atomic_read(&clp
->cl_count
) > 1);
2217 if (strlen(section
))
2219 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2220 " with error %d\n", section_sep
, section
,
2221 clp
->cl_hostname
, -status
);
2223 nfs4_end_drain_session(clp
);
2224 nfs4_clear_state_manager_bit(clp
);
2227 static int nfs4_run_state_manager(void *ptr
)
2229 struct nfs_client
*clp
= ptr
;
2231 allow_signal(SIGKILL
);
2232 nfs4_state_manager(clp
);
2233 nfs_put_client(clp
);
2234 module_put_and_exit(0);