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
);
231 static void nfs4_end_drain_slot_table(struct nfs4_slot_table
*tbl
)
233 if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_state
)) {
234 spin_lock(&tbl
->slot_tbl_lock
);
235 nfs41_wake_slot_table(tbl
);
236 spin_unlock(&tbl
->slot_tbl_lock
);
240 static void nfs4_end_drain_session(struct nfs_client
*clp
)
242 struct nfs4_session
*ses
= clp
->cl_session
;
245 nfs4_end_drain_slot_table(&ses
->bc_slot_table
);
246 nfs4_end_drain_slot_table(&ses
->fc_slot_table
);
251 * Signal state manager thread if session fore channel is drained
253 void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table
*tbl
)
255 if (nfs4_slot_tbl_draining(tbl
))
256 complete(&tbl
->complete
);
259 static int nfs4_drain_slot_tbl(struct nfs4_slot_table
*tbl
)
261 set_bit(NFS4_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_state
);
262 spin_lock(&tbl
->slot_tbl_lock
);
263 if (tbl
->highest_used_slotid
!= NFS4_NO_SLOT
) {
264 INIT_COMPLETION(tbl
->complete
);
265 spin_unlock(&tbl
->slot_tbl_lock
);
266 return wait_for_completion_interruptible(&tbl
->complete
);
268 spin_unlock(&tbl
->slot_tbl_lock
);
272 static int nfs4_begin_drain_session(struct nfs_client
*clp
)
274 struct nfs4_session
*ses
= clp
->cl_session
;
278 ret
= nfs4_drain_slot_tbl(&ses
->bc_slot_table
);
282 return nfs4_drain_slot_tbl(&ses
->fc_slot_table
);
285 static void nfs41_finish_session_reset(struct nfs_client
*clp
)
287 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
288 clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
289 /* create_session negotiated new slot table */
290 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
291 nfs41_setup_state_renewal(clp
);
294 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
298 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
300 nfs4_begin_drain_session(clp
);
301 status
= nfs4_proc_exchange_id(clp
, cred
);
304 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
306 status
= nfs4_proc_create_session(clp
, cred
);
309 nfs41_finish_session_reset(clp
);
310 nfs_mark_client_ready(clp
, NFS_CS_READY
);
316 * nfs41_discover_server_trunking - Detect server IP address trunking (mv1)
318 * @clp: nfs_client under test
319 * @result: OUT: found nfs_client, or clp
320 * @cred: credential to use for trunking test
322 * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status.
323 * If NFS4_OK is returned, an nfs_client pointer is planted in
326 * Note: The returned client may not yet be marked ready.
328 int nfs41_discover_server_trunking(struct nfs_client
*clp
,
329 struct nfs_client
**result
,
330 struct rpc_cred
*cred
)
334 status
= nfs4_proc_exchange_id(clp
, cred
);
335 if (status
!= NFS4_OK
)
337 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
339 return nfs41_walk_client_list(clp
, result
, cred
);
342 struct rpc_cred
*nfs4_get_exchange_id_cred(struct nfs_client
*clp
)
344 struct rpc_cred
*cred
;
346 spin_lock(&clp
->cl_lock
);
347 cred
= nfs4_get_machine_cred_locked(clp
);
348 spin_unlock(&clp
->cl_lock
);
352 #endif /* CONFIG_NFS_V4_1 */
354 static struct rpc_cred
*
355 nfs4_get_setclientid_cred_server(struct nfs_server
*server
)
357 struct nfs_client
*clp
= server
->nfs_client
;
358 struct rpc_cred
*cred
= NULL
;
359 struct nfs4_state_owner
*sp
;
362 spin_lock(&clp
->cl_lock
);
363 pos
= rb_first(&server
->state_owners
);
365 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
366 cred
= get_rpccred(sp
->so_cred
);
368 spin_unlock(&clp
->cl_lock
);
373 * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation
374 * @clp: client state handle
376 * Returns an rpc_cred with reference count bumped, or NULL.
378 struct rpc_cred
*nfs4_get_setclientid_cred(struct nfs_client
*clp
)
380 struct nfs_server
*server
;
381 struct rpc_cred
*cred
;
383 spin_lock(&clp
->cl_lock
);
384 cred
= nfs4_get_machine_cred_locked(clp
);
385 spin_unlock(&clp
->cl_lock
);
390 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
391 cred
= nfs4_get_setclientid_cred_server(server
);
401 static struct nfs4_state_owner
*
402 nfs4_find_state_owner_locked(struct nfs_server
*server
, struct rpc_cred
*cred
)
404 struct rb_node
**p
= &server
->state_owners
.rb_node
,
406 struct nfs4_state_owner
*sp
;
410 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
412 if (cred
< sp
->so_cred
)
413 p
= &parent
->rb_left
;
414 else if (cred
> sp
->so_cred
)
415 p
= &parent
->rb_right
;
417 if (!list_empty(&sp
->so_lru
))
418 list_del_init(&sp
->so_lru
);
419 atomic_inc(&sp
->so_count
);
426 static struct nfs4_state_owner
*
427 nfs4_insert_state_owner_locked(struct nfs4_state_owner
*new)
429 struct nfs_server
*server
= new->so_server
;
430 struct rb_node
**p
= &server
->state_owners
.rb_node
,
432 struct nfs4_state_owner
*sp
;
437 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
439 if (new->so_cred
< sp
->so_cred
)
440 p
= &parent
->rb_left
;
441 else if (new->so_cred
> sp
->so_cred
)
442 p
= &parent
->rb_right
;
444 if (!list_empty(&sp
->so_lru
))
445 list_del_init(&sp
->so_lru
);
446 atomic_inc(&sp
->so_count
);
450 err
= ida_get_new(&server
->openowner_id
, &new->so_seqid
.owner_id
);
453 rb_link_node(&new->so_server_node
, parent
, p
);
454 rb_insert_color(&new->so_server_node
, &server
->state_owners
);
459 nfs4_remove_state_owner_locked(struct nfs4_state_owner
*sp
)
461 struct nfs_server
*server
= sp
->so_server
;
463 if (!RB_EMPTY_NODE(&sp
->so_server_node
))
464 rb_erase(&sp
->so_server_node
, &server
->state_owners
);
465 ida_remove(&server
->openowner_id
, sp
->so_seqid
.owner_id
);
469 nfs4_init_seqid_counter(struct nfs_seqid_counter
*sc
)
471 sc
->create_time
= ktime_get();
474 spin_lock_init(&sc
->lock
);
475 INIT_LIST_HEAD(&sc
->list
);
476 rpc_init_wait_queue(&sc
->wait
, "Seqid_waitqueue");
480 nfs4_destroy_seqid_counter(struct nfs_seqid_counter
*sc
)
482 rpc_destroy_wait_queue(&sc
->wait
);
486 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
487 * create a new state_owner.
490 static struct nfs4_state_owner
*
491 nfs4_alloc_state_owner(struct nfs_server
*server
,
492 struct rpc_cred
*cred
,
495 struct nfs4_state_owner
*sp
;
497 sp
= kzalloc(sizeof(*sp
), gfp_flags
);
500 sp
->so_server
= server
;
501 sp
->so_cred
= get_rpccred(cred
);
502 spin_lock_init(&sp
->so_lock
);
503 INIT_LIST_HEAD(&sp
->so_states
);
504 nfs4_init_seqid_counter(&sp
->so_seqid
);
505 atomic_set(&sp
->so_count
, 1);
506 INIT_LIST_HEAD(&sp
->so_lru
);
507 seqcount_init(&sp
->so_reclaim_seqcount
);
508 mutex_init(&sp
->so_delegreturn_mutex
);
513 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
515 struct rb_node
*rb_node
= &sp
->so_server_node
;
517 if (!RB_EMPTY_NODE(rb_node
)) {
518 struct nfs_server
*server
= sp
->so_server
;
519 struct nfs_client
*clp
= server
->nfs_client
;
521 spin_lock(&clp
->cl_lock
);
522 if (!RB_EMPTY_NODE(rb_node
)) {
523 rb_erase(rb_node
, &server
->state_owners
);
524 RB_CLEAR_NODE(rb_node
);
526 spin_unlock(&clp
->cl_lock
);
530 static void nfs4_free_state_owner(struct nfs4_state_owner
*sp
)
532 nfs4_destroy_seqid_counter(&sp
->so_seqid
);
533 put_rpccred(sp
->so_cred
);
537 static void nfs4_gc_state_owners(struct nfs_server
*server
)
539 struct nfs_client
*clp
= server
->nfs_client
;
540 struct nfs4_state_owner
*sp
, *tmp
;
541 unsigned long time_min
, time_max
;
544 spin_lock(&clp
->cl_lock
);
546 time_min
= (long)time_max
- (long)clp
->cl_lease_time
;
547 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
548 /* NB: LRU is sorted so that oldest is at the head */
549 if (time_in_range(sp
->so_expires
, time_min
, time_max
))
551 list_move(&sp
->so_lru
, &doomed
);
552 nfs4_remove_state_owner_locked(sp
);
554 spin_unlock(&clp
->cl_lock
);
556 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
557 list_del(&sp
->so_lru
);
558 nfs4_free_state_owner(sp
);
563 * nfs4_get_state_owner - Look up a state owner given a credential
564 * @server: nfs_server to search
565 * @cred: RPC credential to match
567 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
569 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
,
570 struct rpc_cred
*cred
,
573 struct nfs_client
*clp
= server
->nfs_client
;
574 struct nfs4_state_owner
*sp
, *new;
576 spin_lock(&clp
->cl_lock
);
577 sp
= nfs4_find_state_owner_locked(server
, cred
);
578 spin_unlock(&clp
->cl_lock
);
581 new = nfs4_alloc_state_owner(server
, cred
, gfp_flags
);
585 if (ida_pre_get(&server
->openowner_id
, gfp_flags
) == 0)
587 spin_lock(&clp
->cl_lock
);
588 sp
= nfs4_insert_state_owner_locked(new);
589 spin_unlock(&clp
->cl_lock
);
590 } while (sp
== ERR_PTR(-EAGAIN
));
592 nfs4_free_state_owner(new);
594 nfs4_gc_state_owners(server
);
599 * nfs4_put_state_owner - Release a nfs4_state_owner
600 * @sp: state owner data to release
602 * Note that we keep released state owners on an LRU
604 * This caches valid state owners so that they can be
605 * reused, to avoid the OPEN_CONFIRM on minor version 0.
606 * It also pins the uniquifier of dropped state owners for
607 * a while, to ensure that those state owner names are
610 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
612 struct nfs_server
*server
= sp
->so_server
;
613 struct nfs_client
*clp
= server
->nfs_client
;
615 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
618 sp
->so_expires
= jiffies
;
619 list_add_tail(&sp
->so_lru
, &server
->state_owners_lru
);
620 spin_unlock(&clp
->cl_lock
);
624 * nfs4_purge_state_owners - Release all cached state owners
625 * @server: nfs_server with cached state owners to release
627 * Called at umount time. Remaining state owners will be on
628 * the LRU with ref count of zero.
630 void nfs4_purge_state_owners(struct nfs_server
*server
)
632 struct nfs_client
*clp
= server
->nfs_client
;
633 struct nfs4_state_owner
*sp
, *tmp
;
636 spin_lock(&clp
->cl_lock
);
637 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
638 list_move(&sp
->so_lru
, &doomed
);
639 nfs4_remove_state_owner_locked(sp
);
641 spin_unlock(&clp
->cl_lock
);
643 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
644 list_del(&sp
->so_lru
);
645 nfs4_free_state_owner(sp
);
649 static struct nfs4_state
*
650 nfs4_alloc_open_state(void)
652 struct nfs4_state
*state
;
654 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
657 atomic_set(&state
->count
, 1);
658 INIT_LIST_HEAD(&state
->lock_states
);
659 spin_lock_init(&state
->state_lock
);
660 seqlock_init(&state
->seqlock
);
665 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
667 if (state
->state
== fmode
)
669 /* NB! List reordering - see the reclaim code for why. */
670 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
671 if (fmode
& FMODE_WRITE
)
672 list_move(&state
->open_states
, &state
->owner
->so_states
);
674 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
676 state
->state
= fmode
;
679 static struct nfs4_state
*
680 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
682 struct nfs_inode
*nfsi
= NFS_I(inode
);
683 struct nfs4_state
*state
;
685 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
686 if (state
->owner
!= owner
)
688 if (!nfs4_valid_open_stateid(state
))
690 if (atomic_inc_not_zero(&state
->count
))
697 nfs4_free_open_state(struct nfs4_state
*state
)
703 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
705 struct nfs4_state
*state
, *new;
706 struct nfs_inode
*nfsi
= NFS_I(inode
);
708 spin_lock(&inode
->i_lock
);
709 state
= __nfs4_find_state_byowner(inode
, owner
);
710 spin_unlock(&inode
->i_lock
);
713 new = nfs4_alloc_open_state();
714 spin_lock(&owner
->so_lock
);
715 spin_lock(&inode
->i_lock
);
716 state
= __nfs4_find_state_byowner(inode
, owner
);
717 if (state
== NULL
&& new != NULL
) {
719 state
->owner
= owner
;
720 atomic_inc(&owner
->so_count
);
721 list_add(&state
->inode_states
, &nfsi
->open_states
);
723 state
->inode
= inode
;
724 spin_unlock(&inode
->i_lock
);
725 /* Note: The reclaim code dictates that we add stateless
726 * and read-only stateids to the end of the list */
727 list_add_tail(&state
->open_states
, &owner
->so_states
);
728 spin_unlock(&owner
->so_lock
);
730 spin_unlock(&inode
->i_lock
);
731 spin_unlock(&owner
->so_lock
);
733 nfs4_free_open_state(new);
739 void nfs4_put_open_state(struct nfs4_state
*state
)
741 struct inode
*inode
= state
->inode
;
742 struct nfs4_state_owner
*owner
= state
->owner
;
744 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
746 spin_lock(&inode
->i_lock
);
747 list_del(&state
->inode_states
);
748 list_del(&state
->open_states
);
749 spin_unlock(&inode
->i_lock
);
750 spin_unlock(&owner
->so_lock
);
752 nfs4_free_open_state(state
);
753 nfs4_put_state_owner(owner
);
757 * Close the current file.
759 static void __nfs4_close(struct nfs4_state
*state
,
760 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
762 struct nfs4_state_owner
*owner
= state
->owner
;
766 atomic_inc(&owner
->so_count
);
767 /* Protect against nfs4_find_state() */
768 spin_lock(&owner
->so_lock
);
769 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
776 case FMODE_READ
|FMODE_WRITE
:
779 newstate
= FMODE_READ
|FMODE_WRITE
;
780 if (state
->n_rdwr
== 0) {
781 if (state
->n_rdonly
== 0) {
782 newstate
&= ~FMODE_READ
;
783 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
784 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
786 if (state
->n_wronly
== 0) {
787 newstate
&= ~FMODE_WRITE
;
788 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
789 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
792 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
794 nfs4_state_set_mode_locked(state
, newstate
);
795 spin_unlock(&owner
->so_lock
);
798 nfs4_put_open_state(state
);
799 nfs4_put_state_owner(owner
);
801 nfs4_do_close(state
, gfp_mask
, wait
);
804 void nfs4_close_state(struct nfs4_state
*state
, fmode_t fmode
)
806 __nfs4_close(state
, fmode
, GFP_NOFS
, 0);
809 void nfs4_close_sync(struct nfs4_state
*state
, fmode_t fmode
)
811 __nfs4_close(state
, fmode
, GFP_KERNEL
, 1);
815 * Search the state->lock_states for an existing lock_owner
816 * that is compatible with current->files
818 static struct nfs4_lock_state
*
819 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
821 struct nfs4_lock_state
*pos
;
822 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
823 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
825 switch (pos
->ls_owner
.lo_type
) {
826 case NFS4_POSIX_LOCK_TYPE
:
827 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
830 case NFS4_FLOCK_LOCK_TYPE
:
831 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
834 atomic_inc(&pos
->ls_count
);
841 * Return a compatible lock_state. If no initialized lock_state structure
842 * exists, return an uninitialized one.
845 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
)
847 struct nfs4_lock_state
*lsp
;
848 struct nfs_server
*server
= state
->owner
->so_server
;
850 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
853 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
854 atomic_set(&lsp
->ls_count
, 1);
855 lsp
->ls_state
= state
;
856 lsp
->ls_owner
.lo_type
= type
;
857 switch (lsp
->ls_owner
.lo_type
) {
858 case NFS4_FLOCK_LOCK_TYPE
:
859 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
861 case NFS4_POSIX_LOCK_TYPE
:
862 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
867 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
868 if (lsp
->ls_seqid
.owner_id
< 0)
870 INIT_LIST_HEAD(&lsp
->ls_locks
);
877 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
879 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
880 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
885 * Return a compatible lock_state. If no initialized lock_state structure
886 * exists, return an uninitialized one.
889 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
891 struct nfs4_lock_state
*lsp
, *new = NULL
;
894 spin_lock(&state
->state_lock
);
895 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
899 list_add(&new->ls_locks
, &state
->lock_states
);
900 set_bit(LK_STATE_IN_USE
, &state
->flags
);
905 spin_unlock(&state
->state_lock
);
906 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
910 spin_unlock(&state
->state_lock
);
912 nfs4_free_lock_state(state
->owner
->so_server
, new);
917 * Release reference to lock_state, and free it if we see that
918 * it is no longer in use
920 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
922 struct nfs_server
*server
;
923 struct nfs4_state
*state
;
927 state
= lsp
->ls_state
;
928 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
930 list_del(&lsp
->ls_locks
);
931 if (list_empty(&state
->lock_states
))
932 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
933 spin_unlock(&state
->state_lock
);
934 server
= state
->owner
->so_server
;
935 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
936 struct nfs_client
*clp
= server
->nfs_client
;
938 clp
->cl_mvops
->free_lock_state(server
, lsp
);
940 nfs4_free_lock_state(server
, lsp
);
943 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
945 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
947 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
948 atomic_inc(&lsp
->ls_count
);
951 static void nfs4_fl_release_lock(struct file_lock
*fl
)
953 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
956 static const struct file_lock_operations nfs4_fl_lock_ops
= {
957 .fl_copy_lock
= nfs4_fl_copy_lock
,
958 .fl_release_private
= nfs4_fl_release_lock
,
961 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
963 struct nfs4_lock_state
*lsp
;
965 if (fl
->fl_ops
!= NULL
)
967 if (fl
->fl_flags
& FL_POSIX
)
968 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
969 else if (fl
->fl_flags
& FL_FLOCK
)
970 lsp
= nfs4_get_lock_state(state
, NULL
, fl
->fl_pid
,
971 NFS4_FLOCK_LOCK_TYPE
);
976 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
977 fl
->fl_ops
= &nfs4_fl_lock_ops
;
981 static int nfs4_copy_lock_stateid(nfs4_stateid
*dst
,
982 struct nfs4_state
*state
,
983 const struct nfs_lockowner
*lockowner
)
985 struct nfs4_lock_state
*lsp
;
991 if (lockowner
== NULL
)
994 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
997 fl_owner
= lockowner
->l_owner
;
998 fl_pid
= lockowner
->l_pid
;
999 spin_lock(&state
->state_lock
);
1000 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
1001 if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
1002 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
1005 if (!list_empty(&lsp
->ls_seqid
.list
))
1008 spin_unlock(&state
->state_lock
);
1009 nfs4_put_lock_state(lsp
);
1014 static int nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
1016 const nfs4_stateid
*src
;
1021 src
= &zero_stateid
;
1022 seq
= read_seqbegin(&state
->seqlock
);
1023 if (test_bit(NFS_OPEN_STATE
, &state
->flags
))
1024 src
= &state
->open_stateid
;
1025 nfs4_stateid_copy(dst
, src
);
1028 if (!list_empty(&state
->owner
->so_seqid
.list
))
1030 } while (read_seqretry(&state
->seqlock
, seq
));
1035 * Byte-range lock aware utility to initialize the stateid of read/write
1038 int nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
1039 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
1042 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
))
1044 ret
= nfs4_copy_lock_stateid(dst
, state
, lockowner
);
1047 ret
= nfs4_copy_open_stateid(dst
, state
);
1049 if (nfs_server_capable(state
->inode
, NFS_CAP_STATEID_NFSV41
))
1054 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1056 struct nfs_seqid
*new;
1058 new = kmalloc(sizeof(*new), gfp_mask
);
1060 new->sequence
= counter
;
1061 INIT_LIST_HEAD(&new->list
);
1067 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1069 struct nfs_seqid_counter
*sequence
;
1071 if (list_empty(&seqid
->list
))
1073 sequence
= seqid
->sequence
;
1074 spin_lock(&sequence
->lock
);
1075 list_del_init(&seqid
->list
);
1076 if (!list_empty(&sequence
->list
)) {
1077 struct nfs_seqid
*next
;
1079 next
= list_first_entry(&sequence
->list
,
1080 struct nfs_seqid
, list
);
1081 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1083 spin_unlock(&sequence
->lock
);
1086 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1088 nfs_release_seqid(seqid
);
1093 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1094 * failed with a seqid incrementing error -
1095 * see comments nfs_fs.h:seqid_mutating_error()
1097 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1102 case -NFS4ERR_BAD_SEQID
:
1103 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1105 pr_warn_ratelimited("NFS: v4 server returned a bad"
1106 " sequence-id error on an"
1107 " unconfirmed sequence %p!\n",
1109 case -NFS4ERR_STALE_CLIENTID
:
1110 case -NFS4ERR_STALE_STATEID
:
1111 case -NFS4ERR_BAD_STATEID
:
1112 case -NFS4ERR_BADXDR
:
1113 case -NFS4ERR_RESOURCE
:
1114 case -NFS4ERR_NOFILEHANDLE
:
1115 /* Non-seqid mutating errors */
1119 * Note: no locking needed as we are guaranteed to be first
1120 * on the sequence list
1122 seqid
->sequence
->counter
++;
1125 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1127 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1128 struct nfs4_state_owner
, so_seqid
);
1129 struct nfs_server
*server
= sp
->so_server
;
1131 if (status
== -NFS4ERR_BAD_SEQID
)
1132 nfs4_drop_state_owner(sp
);
1133 if (!nfs4_has_session(server
->nfs_client
))
1134 nfs_increment_seqid(status
, seqid
);
1138 * Increment the seqid if the LOCK/LOCKU succeeded, or
1139 * failed with a seqid incrementing error -
1140 * see comments nfs_fs.h:seqid_mutating_error()
1142 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1144 nfs_increment_seqid(status
, seqid
);
1147 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1149 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1152 spin_lock(&sequence
->lock
);
1154 if (list_empty(&seqid
->list
))
1155 list_add_tail(&seqid
->list
, &sequence
->list
);
1156 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1158 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1161 spin_unlock(&sequence
->lock
);
1165 static int nfs4_run_state_manager(void *);
1167 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1169 smp_mb__before_clear_bit();
1170 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1171 smp_mb__after_clear_bit();
1172 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1173 rpc_wake_up(&clp
->cl_rpcwaitq
);
1177 * Schedule the nfs_client asynchronous state management routine
1179 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1181 struct task_struct
*task
;
1182 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1184 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1186 __module_get(THIS_MODULE
);
1187 atomic_inc(&clp
->cl_count
);
1189 /* The rcu_read_lock() is not strictly necessary, as the state
1190 * manager is the only thread that ever changes the rpc_xprt
1191 * after it's initialized. At this point, we're single threaded. */
1193 snprintf(buf
, sizeof(buf
), "%s-manager",
1194 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1196 task
= kthread_run(nfs4_run_state_manager
, clp
, "%s", buf
);
1198 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1199 __func__
, PTR_ERR(task
));
1200 nfs4_clear_state_manager_bit(clp
);
1201 nfs_put_client(clp
);
1202 module_put(THIS_MODULE
);
1207 * Schedule a lease recovery attempt
1209 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1213 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1214 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1215 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1217 nfs4_schedule_state_manager(clp
);
1219 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1221 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1227 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1228 nfs_wait_bit_killable
, TASK_KILLABLE
);
1232 if (clp
->cl_cons_state
< 0)
1233 return clp
->cl_cons_state
;
1237 int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1242 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1243 ret
= nfs4_wait_clnt_recover(clp
);
1246 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1247 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1249 nfs4_schedule_state_manager(clp
);
1256 * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
1257 * @clp: client to process
1259 * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a
1260 * resend of the SETCLIENTID and hence re-establish the
1261 * callback channel. Then return all existing delegations.
1263 static void nfs40_handle_cb_pathdown(struct nfs_client
*clp
)
1265 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1266 nfs_expire_all_delegations(clp
);
1267 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__
,
1271 void nfs4_schedule_path_down_recovery(struct nfs_client
*clp
)
1273 nfs40_handle_cb_pathdown(clp
);
1274 nfs4_schedule_state_manager(clp
);
1277 static int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
1280 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1281 /* Don't recover state that expired before the reboot */
1282 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
1283 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1286 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
1287 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1291 static int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
1293 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
1294 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1295 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
1296 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
1300 int nfs4_schedule_stateid_recovery(const struct nfs_server
*server
, struct nfs4_state
*state
)
1302 struct nfs_client
*clp
= server
->nfs_client
;
1304 if (!nfs4_valid_open_stateid(state
))
1306 nfs4_state_mark_reclaim_nograce(clp
, state
);
1307 dprintk("%s: scheduling stateid recovery for server %s\n", __func__
,
1309 nfs4_schedule_state_manager(clp
);
1312 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery
);
1314 void nfs_inode_find_state_and_recover(struct inode
*inode
,
1315 const nfs4_stateid
*stateid
)
1317 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1318 struct nfs_inode
*nfsi
= NFS_I(inode
);
1319 struct nfs_open_context
*ctx
;
1320 struct nfs4_state
*state
;
1323 spin_lock(&inode
->i_lock
);
1324 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1328 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
1330 if (!nfs4_stateid_match(&state
->stateid
, stateid
))
1332 nfs4_state_mark_reclaim_nograce(clp
, state
);
1335 spin_unlock(&inode
->i_lock
);
1337 nfs4_schedule_state_manager(clp
);
1340 static void nfs4_state_mark_open_context_bad(struct nfs4_state
*state
)
1342 struct inode
*inode
= state
->inode
;
1343 struct nfs_inode
*nfsi
= NFS_I(inode
);
1344 struct nfs_open_context
*ctx
;
1346 spin_lock(&inode
->i_lock
);
1347 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1348 if (ctx
->state
!= state
)
1350 set_bit(NFS_CONTEXT_BAD
, &ctx
->flags
);
1352 spin_unlock(&inode
->i_lock
);
1355 static void nfs4_state_mark_recovery_failed(struct nfs4_state
*state
, int error
)
1357 set_bit(NFS_STATE_RECOVERY_FAILED
, &state
->flags
);
1358 nfs4_state_mark_open_context_bad(state
);
1362 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
1364 struct inode
*inode
= state
->inode
;
1365 struct nfs_inode
*nfsi
= NFS_I(inode
);
1366 struct file_lock
*fl
;
1369 if (inode
->i_flock
== NULL
)
1372 /* Guard against delegation returns and new lock/unlock calls */
1373 down_write(&nfsi
->rwsem
);
1374 /* Protect inode->i_flock using the BKL */
1375 spin_lock(&inode
->i_lock
);
1376 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
1377 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
1379 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1381 spin_unlock(&inode
->i_lock
);
1382 status
= ops
->recover_lock(state
, fl
);
1387 case -NFS4ERR_ADMIN_REVOKED
:
1388 case -NFS4ERR_STALE_STATEID
:
1389 case -NFS4ERR_BAD_STATEID
:
1390 case -NFS4ERR_EXPIRED
:
1391 case -NFS4ERR_NO_GRACE
:
1392 case -NFS4ERR_STALE_CLIENTID
:
1393 case -NFS4ERR_BADSESSION
:
1394 case -NFS4ERR_BADSLOT
:
1395 case -NFS4ERR_BAD_HIGH_SLOT
:
1396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1399 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1400 "Zeroing state\n", __func__
, status
);
1402 case -NFS4ERR_DENIED
:
1403 case -NFS4ERR_RECLAIM_BAD
:
1404 case -NFS4ERR_RECLAIM_CONFLICT
:
1405 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1408 spin_lock(&inode
->i_lock
);
1410 spin_unlock(&inode
->i_lock
);
1412 up_write(&nfsi
->rwsem
);
1416 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1418 struct nfs4_state
*state
;
1419 struct nfs4_lock_state
*lock
;
1422 /* Note: we rely on the sp->so_states list being ordered
1423 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1425 * This is needed to ensure that the server won't give us any
1426 * read delegations that we have to return if, say, we are
1427 * recovering after a network partition or a reboot from a
1428 * server that doesn't support a grace period.
1430 spin_lock(&sp
->so_lock
);
1431 write_seqcount_begin(&sp
->so_reclaim_seqcount
);
1433 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1434 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1436 if (!nfs4_valid_open_stateid(state
))
1438 if (state
->state
== 0)
1440 atomic_inc(&state
->count
);
1441 spin_unlock(&sp
->so_lock
);
1442 status
= ops
->recover_open(sp
, state
);
1444 status
= nfs4_reclaim_locks(state
, ops
);
1446 spin_lock(&state
->state_lock
);
1447 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1448 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1449 pr_warn_ratelimited("NFS: "
1451 "failed!\n", __func__
);
1453 spin_unlock(&state
->state_lock
);
1454 nfs4_put_open_state(state
);
1455 spin_lock(&sp
->so_lock
);
1461 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1462 "Zeroing state\n", __func__
, status
);
1467 * Open state on this file cannot be recovered
1468 * All we can do is revert to using the zero stateid.
1470 nfs4_state_mark_recovery_failed(state
, status
);
1474 case -NFS4ERR_ADMIN_REVOKED
:
1475 case -NFS4ERR_STALE_STATEID
:
1476 case -NFS4ERR_BAD_STATEID
:
1477 case -NFS4ERR_RECLAIM_BAD
:
1478 case -NFS4ERR_RECLAIM_CONFLICT
:
1479 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1481 case -NFS4ERR_EXPIRED
:
1482 case -NFS4ERR_NO_GRACE
:
1483 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1484 case -NFS4ERR_STALE_CLIENTID
:
1485 case -NFS4ERR_BADSESSION
:
1486 case -NFS4ERR_BADSLOT
:
1487 case -NFS4ERR_BAD_HIGH_SLOT
:
1488 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1491 nfs4_put_open_state(state
);
1492 spin_lock(&sp
->so_lock
);
1495 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1496 spin_unlock(&sp
->so_lock
);
1499 nfs4_put_open_state(state
);
1500 spin_lock(&sp
->so_lock
);
1501 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1502 spin_unlock(&sp
->so_lock
);
1506 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1508 struct nfs4_lock_state
*lock
;
1510 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1511 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1512 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1513 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1514 spin_lock(&state
->state_lock
);
1515 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1516 lock
->ls_seqid
.flags
= 0;
1517 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1519 spin_unlock(&state
->state_lock
);
1522 static void nfs4_reset_seqids(struct nfs_server
*server
,
1523 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1525 struct nfs_client
*clp
= server
->nfs_client
;
1526 struct nfs4_state_owner
*sp
;
1527 struct rb_node
*pos
;
1528 struct nfs4_state
*state
;
1530 spin_lock(&clp
->cl_lock
);
1531 for (pos
= rb_first(&server
->state_owners
);
1533 pos
= rb_next(pos
)) {
1534 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1535 sp
->so_seqid
.flags
= 0;
1536 spin_lock(&sp
->so_lock
);
1537 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1538 if (mark_reclaim(clp
, state
))
1539 nfs4_clear_open_state(state
);
1541 spin_unlock(&sp
->so_lock
);
1543 spin_unlock(&clp
->cl_lock
);
1546 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1547 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1549 struct nfs_server
*server
;
1552 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1553 nfs4_reset_seqids(server
, mark_reclaim
);
1557 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1559 /* Mark all delegations for reclaim */
1560 nfs_delegation_mark_reclaim(clp
);
1561 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1564 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1565 const struct nfs4_state_recovery_ops
*ops
,
1566 struct rpc_cred
*cred
)
1568 /* Notify the server we're done reclaiming our state */
1569 if (ops
->reclaim_complete
)
1570 (void)ops
->reclaim_complete(clp
, cred
);
1573 static void nfs4_clear_reclaim_server(struct nfs_server
*server
)
1575 struct nfs_client
*clp
= server
->nfs_client
;
1576 struct nfs4_state_owner
*sp
;
1577 struct rb_node
*pos
;
1578 struct nfs4_state
*state
;
1580 spin_lock(&clp
->cl_lock
);
1581 for (pos
= rb_first(&server
->state_owners
);
1583 pos
= rb_next(pos
)) {
1584 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1585 spin_lock(&sp
->so_lock
);
1586 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1587 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
,
1590 nfs4_state_mark_reclaim_nograce(clp
, state
);
1592 spin_unlock(&sp
->so_lock
);
1594 spin_unlock(&clp
->cl_lock
);
1597 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1599 struct nfs_server
*server
;
1601 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1605 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1606 nfs4_clear_reclaim_server(server
);
1609 nfs_delegation_reap_unclaimed(clp
);
1613 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1615 const struct nfs4_state_recovery_ops
*ops
;
1616 struct rpc_cred
*cred
;
1618 if (!nfs4_state_clear_reclaim_reboot(clp
))
1620 ops
= clp
->cl_mvops
->reboot_recovery_ops
;
1621 cred
= ops
->get_clid_cred(clp
);
1622 nfs4_reclaim_complete(clp
, ops
, cred
);
1626 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1628 nfs_delegation_mark_reclaim(clp
);
1629 nfs_delegation_reap_unclaimed(clp
);
1632 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1634 nfs_delegation_clear_all(clp
);
1635 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1638 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1643 case -NFS4ERR_CB_PATH_DOWN
:
1644 nfs40_handle_cb_pathdown(clp
);
1646 case -NFS4ERR_NO_GRACE
:
1647 nfs4_state_end_reclaim_reboot(clp
);
1649 case -NFS4ERR_STALE_CLIENTID
:
1650 case -NFS4ERR_LEASE_MOVED
:
1651 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1652 nfs4_state_clear_reclaim_reboot(clp
);
1653 nfs4_state_start_reclaim_reboot(clp
);
1655 case -NFS4ERR_EXPIRED
:
1656 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1657 nfs4_state_start_reclaim_nograce(clp
);
1659 case -NFS4ERR_BADSESSION
:
1660 case -NFS4ERR_BADSLOT
:
1661 case -NFS4ERR_BAD_HIGH_SLOT
:
1662 case -NFS4ERR_DEADSESSION
:
1663 case -NFS4ERR_SEQ_FALSE_RETRY
:
1664 case -NFS4ERR_SEQ_MISORDERED
:
1665 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1666 /* Zero session reset errors */
1668 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1669 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1672 dprintk("%s: failed to handle error %d for server %s\n",
1673 __func__
, error
, clp
->cl_hostname
);
1676 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1681 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1683 struct nfs4_state_owner
*sp
;
1684 struct nfs_server
*server
;
1685 struct rb_node
*pos
;
1690 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1691 nfs4_purge_state_owners(server
);
1692 spin_lock(&clp
->cl_lock
);
1693 for (pos
= rb_first(&server
->state_owners
);
1695 pos
= rb_next(pos
)) {
1697 struct nfs4_state_owner
, so_server_node
);
1698 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1701 atomic_inc(&sp
->so_count
);
1702 spin_unlock(&clp
->cl_lock
);
1705 status
= nfs4_reclaim_open_state(sp
, ops
);
1707 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1708 nfs4_put_state_owner(sp
);
1709 return nfs4_recovery_handle_error(clp
, status
);
1712 nfs4_put_state_owner(sp
);
1715 spin_unlock(&clp
->cl_lock
);
1721 static int nfs4_check_lease(struct nfs_client
*clp
)
1723 struct rpc_cred
*cred
;
1724 const struct nfs4_state_maintenance_ops
*ops
=
1725 clp
->cl_mvops
->state_renewal_ops
;
1728 /* Is the client already known to have an expired lease? */
1729 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1731 spin_lock(&clp
->cl_lock
);
1732 cred
= ops
->get_state_renewal_cred_locked(clp
);
1733 spin_unlock(&clp
->cl_lock
);
1735 cred
= nfs4_get_setclientid_cred(clp
);
1740 status
= ops
->renew_lease(clp
, cred
);
1742 if (status
== -ETIMEDOUT
) {
1743 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1747 return nfs4_recovery_handle_error(clp
, status
);
1750 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1751 * and for recoverable errors on EXCHANGE_ID for v4.1
1753 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1756 case -NFS4ERR_SEQ_MISORDERED
:
1757 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1758 return -ESERVERFAULT
;
1759 /* Lease confirmation error: retry after purging the lease */
1761 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1763 case -NFS4ERR_STALE_CLIENTID
:
1764 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1765 nfs4_state_clear_reclaim_reboot(clp
);
1766 nfs4_state_start_reclaim_reboot(clp
);
1768 case -NFS4ERR_CLID_INUSE
:
1769 pr_err("NFS: Server %s reports our clientid is in use\n",
1771 nfs_mark_client_ready(clp
, -EPERM
);
1772 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1775 case -NFS4ERR_DELAY
:
1781 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1782 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1783 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1784 dprintk("%s: exit with error %d for server %s\n",
1785 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1786 return -EPROTONOSUPPORT
;
1787 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1788 * in nfs4_exchange_id */
1790 dprintk("%s: exit with error %d for server %s\n", __func__
,
1791 status
, clp
->cl_hostname
);
1794 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1795 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1800 static int nfs4_establish_lease(struct nfs_client
*clp
)
1802 struct rpc_cred
*cred
;
1803 const struct nfs4_state_recovery_ops
*ops
=
1804 clp
->cl_mvops
->reboot_recovery_ops
;
1807 cred
= ops
->get_clid_cred(clp
);
1810 status
= ops
->establish_clid(clp
, cred
);
1814 pnfs_destroy_all_layouts(clp
);
1819 * Returns zero or a negative errno. NFS4ERR values are converted
1820 * to local errno values.
1822 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1826 status
= nfs4_establish_lease(clp
);
1828 return nfs4_handle_reclaim_lease_error(clp
, status
);
1829 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1830 nfs4_state_start_reclaim_nograce(clp
);
1831 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1832 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1833 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1834 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1838 static int nfs4_purge_lease(struct nfs_client
*clp
)
1842 status
= nfs4_establish_lease(clp
);
1844 return nfs4_handle_reclaim_lease_error(clp
, status
);
1845 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1846 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1847 nfs4_state_start_reclaim_nograce(clp
);
1852 * nfs4_discover_server_trunking - Detect server IP address trunking
1854 * @clp: nfs_client under test
1855 * @result: OUT: found nfs_client, or clp
1857 * Returns zero or a negative errno. If zero is returned,
1858 * an nfs_client pointer is planted in "result".
1860 * Note: since we are invoked in process context, and
1861 * not from inside the state manager, we cannot use
1862 * nfs4_handle_reclaim_lease_error().
1864 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
1865 struct nfs_client
**result
)
1867 const struct nfs4_state_recovery_ops
*ops
=
1868 clp
->cl_mvops
->reboot_recovery_ops
;
1869 struct rpc_clnt
*clnt
;
1870 struct rpc_cred
*cred
;
1873 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
1875 clnt
= clp
->cl_rpcclient
;
1878 mutex_lock(&nfs_clid_init_mutex
);
1881 cred
= ops
->get_clid_cred(clp
);
1885 status
= ops
->detect_trunking(clp
, result
, cred
);
1890 case -NFS4ERR_DELAY
:
1894 case -NFS4ERR_STALE_CLIENTID
:
1895 dprintk("NFS: %s after status %d, retrying\n",
1901 case -NFS4ERR_CLID_INUSE
:
1902 case -NFS4ERR_WRONGSEC
:
1903 clnt
= rpc_clone_client_set_auth(clnt
, RPC_AUTH_UNIX
);
1905 status
= PTR_ERR(clnt
);
1908 /* Note: this is safe because we haven't yet marked the
1909 * client as ready, so we are the only user of
1912 clnt
= xchg(&clp
->cl_rpcclient
, clnt
);
1913 rpc_shutdown_client(clnt
);
1914 clnt
= clp
->cl_rpcclient
;
1917 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1918 status
= -EPROTONOSUPPORT
;
1922 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1923 * in nfs4_exchange_id */
1924 status
= -EKEYEXPIRED
;
1927 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
1933 mutex_unlock(&nfs_clid_init_mutex
);
1934 dprintk("NFS: %s: status = %d\n", __func__
, status
);
1938 #ifdef CONFIG_NFS_V4_1
1939 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
1941 struct nfs_client
*clp
= session
->clp
;
1945 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1947 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1948 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1950 nfs4_schedule_lease_recovery(clp
);
1952 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
1954 static void nfs41_ping_server(struct nfs_client
*clp
)
1956 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
1957 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1958 nfs4_schedule_state_manager(clp
);
1961 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
1963 nfs41_ping_server(clp
);
1966 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
1968 nfs41_ping_server(clp
);
1971 static void nfs4_reset_all_state(struct nfs_client
*clp
)
1973 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1974 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1975 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1976 nfs4_state_start_reclaim_nograce(clp
);
1977 dprintk("%s: scheduling reset of all state for server %s!\n",
1978 __func__
, clp
->cl_hostname
);
1979 nfs4_schedule_state_manager(clp
);
1983 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
1985 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1986 nfs4_state_start_reclaim_reboot(clp
);
1987 dprintk("%s: server %s rebooted!\n", __func__
,
1989 nfs4_schedule_state_manager(clp
);
1993 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
1995 nfs4_reset_all_state(clp
);
1996 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
1999 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
2001 /* This will need to handle layouts too */
2002 nfs_expire_all_delegations(clp
);
2003 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
2007 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
2009 nfs_expire_all_delegations(clp
);
2010 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
2011 nfs4_schedule_state_manager(clp
);
2012 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
2016 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
2018 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2019 &clp
->cl_state
) == 0)
2020 nfs4_schedule_state_manager(clp
);
2023 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
2028 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2029 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
2031 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2032 nfs41_handle_server_reboot(clp
);
2033 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2034 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2035 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
2036 SEQ4_STATUS_LEASE_MOVED
))
2037 nfs41_handle_state_revoked(clp
);
2038 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2039 nfs41_handle_recallable_state_revoked(clp
);
2040 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2041 nfs41_handle_backchannel_fault(clp
);
2042 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2043 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2044 nfs41_handle_cb_path_down(clp
);
2047 static int nfs4_reset_session(struct nfs_client
*clp
)
2049 struct rpc_cred
*cred
;
2052 if (!nfs4_has_session(clp
))
2054 nfs4_begin_drain_session(clp
);
2055 cred
= nfs4_get_exchange_id_cred(clp
);
2056 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2059 case -NFS4ERR_BADSESSION
:
2060 case -NFS4ERR_DEADSESSION
:
2062 case -NFS4ERR_BACK_CHAN_BUSY
:
2063 case -NFS4ERR_DELAY
:
2064 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2069 status
= nfs4_recovery_handle_error(clp
, status
);
2073 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2074 status
= nfs4_proc_create_session(clp
, cred
);
2076 dprintk("%s: session reset failed with status %d for server %s!\n",
2077 __func__
, status
, clp
->cl_hostname
);
2078 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2081 nfs41_finish_session_reset(clp
);
2082 dprintk("%s: session reset was successful for server %s!\n",
2083 __func__
, clp
->cl_hostname
);
2090 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2092 struct rpc_cred
*cred
;
2095 if (!nfs4_has_session(clp
))
2097 nfs4_begin_drain_session(clp
);
2098 cred
= nfs4_get_exchange_id_cred(clp
);
2099 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2102 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2105 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2106 __func__
, clp
->cl_hostname
);
2108 case -NFS4ERR_DELAY
:
2110 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2113 return nfs4_recovery_handle_error(clp
, ret
);
2117 #else /* CONFIG_NFS_V4_1 */
2118 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2119 static int nfs4_end_drain_session(struct nfs_client
*clp
) { return 0; }
2121 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2125 #endif /* CONFIG_NFS_V4_1 */
2127 static void nfs4_state_manager(struct nfs_client
*clp
)
2130 const char *section
= "", *section_sep
= "";
2132 /* Ensure exclusive access to NFSv4 state */
2134 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2135 section
= "purge state";
2136 status
= nfs4_purge_lease(clp
);
2142 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2143 section
= "lease expired";
2144 /* We're going to have to re-establish a clientid */
2145 status
= nfs4_reclaim_lease(clp
);
2151 /* Initialize or reset the session */
2152 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2153 section
= "reset session";
2154 status
= nfs4_reset_session(clp
);
2155 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2161 /* Send BIND_CONN_TO_SESSION */
2162 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2164 section
= "bind conn to session";
2165 status
= nfs4_bind_conn_to_session(clp
);
2171 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2172 section
= "check lease";
2173 status
= nfs4_check_lease(clp
);
2179 /* First recover reboot state... */
2180 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2181 section
= "reclaim reboot";
2182 status
= nfs4_do_reclaim(clp
,
2183 clp
->cl_mvops
->reboot_recovery_ops
);
2184 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2185 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
2187 nfs4_state_end_reclaim_reboot(clp
);
2188 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
2194 /* Now recover expired state... */
2195 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2196 section
= "reclaim nograce";
2197 status
= nfs4_do_reclaim(clp
,
2198 clp
->cl_mvops
->nograce_recovery_ops
);
2199 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2200 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
2201 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
2207 nfs4_end_drain_session(clp
);
2208 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2209 nfs_client_return_marked_delegations(clp
);
2213 nfs4_clear_state_manager_bit(clp
);
2214 /* Did we race with an attempt to give us more work? */
2215 if (clp
->cl_state
== 0)
2217 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2219 } while (atomic_read(&clp
->cl_count
) > 1);
2222 if (strlen(section
))
2224 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2225 " with error %d\n", section_sep
, section
,
2226 clp
->cl_hostname
, -status
);
2228 nfs4_end_drain_session(clp
);
2229 nfs4_clear_state_manager_bit(clp
);
2232 static int nfs4_run_state_manager(void *ptr
)
2234 struct nfs_client
*clp
= ptr
;
2236 allow_signal(SIGKILL
);
2237 nfs4_state_manager(clp
);
2238 nfs_put_client(clp
);
2239 module_put_and_exit(0);