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_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_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_slot_tbl_drain_complete(struct nfs4_slot_table
*tbl
)
256 if (nfs4_slot_tbl_draining(tbl
))
257 complete(&tbl
->complete
);
260 static int nfs4_drain_slot_tbl(struct nfs4_slot_table
*tbl
)
262 set_bit(NFS4_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_state
);
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
;
279 ret
= nfs4_drain_slot_tbl(&ses
->bc_slot_table
);
283 return nfs4_drain_slot_tbl(&ses
->fc_slot_table
);
286 static void nfs41_finish_session_reset(struct nfs_client
*clp
)
288 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
289 clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
290 /* create_session negotiated new slot table */
291 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
292 nfs41_setup_state_renewal(clp
);
295 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
299 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
301 nfs4_begin_drain_session(clp
);
302 status
= nfs4_proc_exchange_id(clp
, cred
);
305 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
307 status
= nfs4_proc_create_session(clp
, cred
);
310 nfs41_finish_session_reset(clp
);
311 nfs_mark_client_ready(clp
, NFS_CS_READY
);
317 * nfs41_discover_server_trunking - Detect server IP address trunking (mv1)
319 * @clp: nfs_client under test
320 * @result: OUT: found nfs_client, or clp
321 * @cred: credential to use for trunking test
323 * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status.
324 * If NFS4_OK is returned, an nfs_client pointer is planted in
327 * Note: The returned client may not yet be marked ready.
329 int nfs41_discover_server_trunking(struct nfs_client
*clp
,
330 struct nfs_client
**result
,
331 struct rpc_cred
*cred
)
335 status
= nfs4_proc_exchange_id(clp
, cred
);
336 if (status
!= NFS4_OK
)
338 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
340 return nfs41_walk_client_list(clp
, result
, cred
);
343 struct rpc_cred
*nfs4_get_exchange_id_cred(struct nfs_client
*clp
)
345 struct rpc_cred
*cred
;
347 spin_lock(&clp
->cl_lock
);
348 cred
= nfs4_get_machine_cred_locked(clp
);
349 spin_unlock(&clp
->cl_lock
);
353 #endif /* CONFIG_NFS_V4_1 */
355 static struct rpc_cred
*
356 nfs4_get_setclientid_cred_server(struct nfs_server
*server
)
358 struct nfs_client
*clp
= server
->nfs_client
;
359 struct rpc_cred
*cred
= NULL
;
360 struct nfs4_state_owner
*sp
;
363 spin_lock(&clp
->cl_lock
);
364 pos
= rb_first(&server
->state_owners
);
366 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
367 cred
= get_rpccred(sp
->so_cred
);
369 spin_unlock(&clp
->cl_lock
);
374 * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation
375 * @clp: client state handle
377 * Returns an rpc_cred with reference count bumped, or NULL.
379 struct rpc_cred
*nfs4_get_setclientid_cred(struct nfs_client
*clp
)
381 struct nfs_server
*server
;
382 struct rpc_cred
*cred
;
384 spin_lock(&clp
->cl_lock
);
385 cred
= nfs4_get_machine_cred_locked(clp
);
386 spin_unlock(&clp
->cl_lock
);
391 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
392 cred
= nfs4_get_setclientid_cred_server(server
);
402 static struct nfs4_state_owner
*
403 nfs4_find_state_owner_locked(struct nfs_server
*server
, struct rpc_cred
*cred
)
405 struct rb_node
**p
= &server
->state_owners
.rb_node
,
407 struct nfs4_state_owner
*sp
;
411 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
413 if (cred
< sp
->so_cred
)
414 p
= &parent
->rb_left
;
415 else if (cred
> sp
->so_cred
)
416 p
= &parent
->rb_right
;
418 if (!list_empty(&sp
->so_lru
))
419 list_del_init(&sp
->so_lru
);
420 atomic_inc(&sp
->so_count
);
427 static struct nfs4_state_owner
*
428 nfs4_insert_state_owner_locked(struct nfs4_state_owner
*new)
430 struct nfs_server
*server
= new->so_server
;
431 struct rb_node
**p
= &server
->state_owners
.rb_node
,
433 struct nfs4_state_owner
*sp
;
438 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
440 if (new->so_cred
< sp
->so_cred
)
441 p
= &parent
->rb_left
;
442 else if (new->so_cred
> sp
->so_cred
)
443 p
= &parent
->rb_right
;
445 if (!list_empty(&sp
->so_lru
))
446 list_del_init(&sp
->so_lru
);
447 atomic_inc(&sp
->so_count
);
451 err
= ida_get_new(&server
->openowner_id
, &new->so_seqid
.owner_id
);
454 rb_link_node(&new->so_server_node
, parent
, p
);
455 rb_insert_color(&new->so_server_node
, &server
->state_owners
);
460 nfs4_remove_state_owner_locked(struct nfs4_state_owner
*sp
)
462 struct nfs_server
*server
= sp
->so_server
;
464 if (!RB_EMPTY_NODE(&sp
->so_server_node
))
465 rb_erase(&sp
->so_server_node
, &server
->state_owners
);
466 ida_remove(&server
->openowner_id
, sp
->so_seqid
.owner_id
);
470 nfs4_init_seqid_counter(struct nfs_seqid_counter
*sc
)
472 sc
->create_time
= ktime_get();
475 spin_lock_init(&sc
->lock
);
476 INIT_LIST_HEAD(&sc
->list
);
477 rpc_init_wait_queue(&sc
->wait
, "Seqid_waitqueue");
481 nfs4_destroy_seqid_counter(struct nfs_seqid_counter
*sc
)
483 rpc_destroy_wait_queue(&sc
->wait
);
487 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
488 * create a new state_owner.
491 static struct nfs4_state_owner
*
492 nfs4_alloc_state_owner(struct nfs_server
*server
,
493 struct rpc_cred
*cred
,
496 struct nfs4_state_owner
*sp
;
498 sp
= kzalloc(sizeof(*sp
), gfp_flags
);
501 sp
->so_server
= server
;
502 sp
->so_cred
= get_rpccred(cred
);
503 spin_lock_init(&sp
->so_lock
);
504 INIT_LIST_HEAD(&sp
->so_states
);
505 nfs4_init_seqid_counter(&sp
->so_seqid
);
506 atomic_set(&sp
->so_count
, 1);
507 INIT_LIST_HEAD(&sp
->so_lru
);
508 seqcount_init(&sp
->so_reclaim_seqcount
);
509 mutex_init(&sp
->so_delegreturn_mutex
);
514 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
516 struct rb_node
*rb_node
= &sp
->so_server_node
;
518 if (!RB_EMPTY_NODE(rb_node
)) {
519 struct nfs_server
*server
= sp
->so_server
;
520 struct nfs_client
*clp
= server
->nfs_client
;
522 spin_lock(&clp
->cl_lock
);
523 if (!RB_EMPTY_NODE(rb_node
)) {
524 rb_erase(rb_node
, &server
->state_owners
);
525 RB_CLEAR_NODE(rb_node
);
527 spin_unlock(&clp
->cl_lock
);
531 static void nfs4_free_state_owner(struct nfs4_state_owner
*sp
)
533 nfs4_destroy_seqid_counter(&sp
->so_seqid
);
534 put_rpccred(sp
->so_cred
);
538 static void nfs4_gc_state_owners(struct nfs_server
*server
)
540 struct nfs_client
*clp
= server
->nfs_client
;
541 struct nfs4_state_owner
*sp
, *tmp
;
542 unsigned long time_min
, time_max
;
545 spin_lock(&clp
->cl_lock
);
547 time_min
= (long)time_max
- (long)clp
->cl_lease_time
;
548 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
549 /* NB: LRU is sorted so that oldest is at the head */
550 if (time_in_range(sp
->so_expires
, time_min
, time_max
))
552 list_move(&sp
->so_lru
, &doomed
);
553 nfs4_remove_state_owner_locked(sp
);
555 spin_unlock(&clp
->cl_lock
);
557 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
558 list_del(&sp
->so_lru
);
559 nfs4_free_state_owner(sp
);
564 * nfs4_get_state_owner - Look up a state owner given a credential
565 * @server: nfs_server to search
566 * @cred: RPC credential to match
568 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
570 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
,
571 struct rpc_cred
*cred
,
574 struct nfs_client
*clp
= server
->nfs_client
;
575 struct nfs4_state_owner
*sp
, *new;
577 spin_lock(&clp
->cl_lock
);
578 sp
= nfs4_find_state_owner_locked(server
, cred
);
579 spin_unlock(&clp
->cl_lock
);
582 new = nfs4_alloc_state_owner(server
, cred
, gfp_flags
);
586 if (ida_pre_get(&server
->openowner_id
, gfp_flags
) == 0)
588 spin_lock(&clp
->cl_lock
);
589 sp
= nfs4_insert_state_owner_locked(new);
590 spin_unlock(&clp
->cl_lock
);
591 } while (sp
== ERR_PTR(-EAGAIN
));
593 nfs4_free_state_owner(new);
595 nfs4_gc_state_owners(server
);
600 * nfs4_put_state_owner - Release a nfs4_state_owner
601 * @sp: state owner data to release
603 * Note that we keep released state owners on an LRU
605 * This caches valid state owners so that they can be
606 * reused, to avoid the OPEN_CONFIRM on minor version 0.
607 * It also pins the uniquifier of dropped state owners for
608 * a while, to ensure that those state owner names are
611 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
613 struct nfs_server
*server
= sp
->so_server
;
614 struct nfs_client
*clp
= server
->nfs_client
;
616 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
619 sp
->so_expires
= jiffies
;
620 list_add_tail(&sp
->so_lru
, &server
->state_owners_lru
);
621 spin_unlock(&clp
->cl_lock
);
625 * nfs4_purge_state_owners - Release all cached state owners
626 * @server: nfs_server with cached state owners to release
628 * Called at umount time. Remaining state owners will be on
629 * the LRU with ref count of zero.
631 void nfs4_purge_state_owners(struct nfs_server
*server
)
633 struct nfs_client
*clp
= server
->nfs_client
;
634 struct nfs4_state_owner
*sp
, *tmp
;
637 spin_lock(&clp
->cl_lock
);
638 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
639 list_move(&sp
->so_lru
, &doomed
);
640 nfs4_remove_state_owner_locked(sp
);
642 spin_unlock(&clp
->cl_lock
);
644 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
645 list_del(&sp
->so_lru
);
646 nfs4_free_state_owner(sp
);
650 static struct nfs4_state
*
651 nfs4_alloc_open_state(void)
653 struct nfs4_state
*state
;
655 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
658 atomic_set(&state
->count
, 1);
659 INIT_LIST_HEAD(&state
->lock_states
);
660 spin_lock_init(&state
->state_lock
);
661 seqlock_init(&state
->seqlock
);
666 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
668 if (state
->state
== fmode
)
670 /* NB! List reordering - see the reclaim code for why. */
671 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
672 if (fmode
& FMODE_WRITE
)
673 list_move(&state
->open_states
, &state
->owner
->so_states
);
675 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
677 state
->state
= fmode
;
680 static struct nfs4_state
*
681 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
683 struct nfs_inode
*nfsi
= NFS_I(inode
);
684 struct nfs4_state
*state
;
686 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
687 if (state
->owner
!= owner
)
689 if (!nfs4_valid_open_stateid(state
))
691 if (atomic_inc_not_zero(&state
->count
))
698 nfs4_free_open_state(struct nfs4_state
*state
)
704 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
706 struct nfs4_state
*state
, *new;
707 struct nfs_inode
*nfsi
= NFS_I(inode
);
709 spin_lock(&inode
->i_lock
);
710 state
= __nfs4_find_state_byowner(inode
, owner
);
711 spin_unlock(&inode
->i_lock
);
714 new = nfs4_alloc_open_state();
715 spin_lock(&owner
->so_lock
);
716 spin_lock(&inode
->i_lock
);
717 state
= __nfs4_find_state_byowner(inode
, owner
);
718 if (state
== NULL
&& new != NULL
) {
720 state
->owner
= owner
;
721 atomic_inc(&owner
->so_count
);
722 list_add(&state
->inode_states
, &nfsi
->open_states
);
724 state
->inode
= inode
;
725 spin_unlock(&inode
->i_lock
);
726 /* Note: The reclaim code dictates that we add stateless
727 * and read-only stateids to the end of the list */
728 list_add_tail(&state
->open_states
, &owner
->so_states
);
729 spin_unlock(&owner
->so_lock
);
731 spin_unlock(&inode
->i_lock
);
732 spin_unlock(&owner
->so_lock
);
734 nfs4_free_open_state(new);
740 void nfs4_put_open_state(struct nfs4_state
*state
)
742 struct inode
*inode
= state
->inode
;
743 struct nfs4_state_owner
*owner
= state
->owner
;
745 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
747 spin_lock(&inode
->i_lock
);
748 list_del(&state
->inode_states
);
749 list_del(&state
->open_states
);
750 spin_unlock(&inode
->i_lock
);
751 spin_unlock(&owner
->so_lock
);
753 nfs4_free_open_state(state
);
754 nfs4_put_state_owner(owner
);
758 * Close the current file.
760 static void __nfs4_close(struct nfs4_state
*state
,
761 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
763 struct nfs4_state_owner
*owner
= state
->owner
;
767 atomic_inc(&owner
->so_count
);
768 /* Protect against nfs4_find_state() */
769 spin_lock(&owner
->so_lock
);
770 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
777 case FMODE_READ
|FMODE_WRITE
:
780 newstate
= FMODE_READ
|FMODE_WRITE
;
781 if (state
->n_rdwr
== 0) {
782 if (state
->n_rdonly
== 0) {
783 newstate
&= ~FMODE_READ
;
784 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
785 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
787 if (state
->n_wronly
== 0) {
788 newstate
&= ~FMODE_WRITE
;
789 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
790 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
793 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
795 nfs4_state_set_mode_locked(state
, newstate
);
796 spin_unlock(&owner
->so_lock
);
799 nfs4_put_open_state(state
);
800 nfs4_put_state_owner(owner
);
802 nfs4_do_close(state
, gfp_mask
, wait
);
805 void nfs4_close_state(struct nfs4_state
*state
, fmode_t fmode
)
807 __nfs4_close(state
, fmode
, GFP_NOFS
, 0);
810 void nfs4_close_sync(struct nfs4_state
*state
, fmode_t fmode
)
812 __nfs4_close(state
, fmode
, GFP_KERNEL
, 1);
816 * Search the state->lock_states for an existing lock_owner
817 * that is compatible with current->files
819 static struct nfs4_lock_state
*
820 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
822 struct nfs4_lock_state
*pos
;
823 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
824 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
826 switch (pos
->ls_owner
.lo_type
) {
827 case NFS4_POSIX_LOCK_TYPE
:
828 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
831 case NFS4_FLOCK_LOCK_TYPE
:
832 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
835 atomic_inc(&pos
->ls_count
);
842 * Return a compatible lock_state. If no initialized lock_state structure
843 * exists, return an uninitialized one.
846 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
)
848 struct nfs4_lock_state
*lsp
;
849 struct nfs_server
*server
= state
->owner
->so_server
;
851 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
854 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
855 atomic_set(&lsp
->ls_count
, 1);
856 lsp
->ls_state
= state
;
857 lsp
->ls_owner
.lo_type
= type
;
858 switch (lsp
->ls_owner
.lo_type
) {
859 case NFS4_FLOCK_LOCK_TYPE
:
860 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
862 case NFS4_POSIX_LOCK_TYPE
:
863 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
868 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
869 if (lsp
->ls_seqid
.owner_id
< 0)
871 INIT_LIST_HEAD(&lsp
->ls_locks
);
878 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
880 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
881 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
886 * Return a compatible lock_state. If no initialized lock_state structure
887 * exists, return an uninitialized one.
890 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
892 struct nfs4_lock_state
*lsp
, *new = NULL
;
895 spin_lock(&state
->state_lock
);
896 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
900 list_add(&new->ls_locks
, &state
->lock_states
);
901 set_bit(LK_STATE_IN_USE
, &state
->flags
);
906 spin_unlock(&state
->state_lock
);
907 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
911 spin_unlock(&state
->state_lock
);
913 nfs4_free_lock_state(state
->owner
->so_server
, new);
918 * Release reference to lock_state, and free it if we see that
919 * it is no longer in use
921 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
923 struct nfs_server
*server
;
924 struct nfs4_state
*state
;
928 state
= lsp
->ls_state
;
929 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
931 list_del(&lsp
->ls_locks
);
932 if (list_empty(&state
->lock_states
))
933 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
934 spin_unlock(&state
->state_lock
);
935 server
= state
->owner
->so_server
;
936 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
937 struct nfs_client
*clp
= server
->nfs_client
;
939 clp
->cl_mvops
->free_lock_state(server
, lsp
);
941 nfs4_free_lock_state(server
, lsp
);
944 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
946 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
948 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
949 atomic_inc(&lsp
->ls_count
);
952 static void nfs4_fl_release_lock(struct file_lock
*fl
)
954 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
957 static const struct file_lock_operations nfs4_fl_lock_ops
= {
958 .fl_copy_lock
= nfs4_fl_copy_lock
,
959 .fl_release_private
= nfs4_fl_release_lock
,
962 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
964 struct nfs4_lock_state
*lsp
;
966 if (fl
->fl_ops
!= NULL
)
968 if (fl
->fl_flags
& FL_POSIX
)
969 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
970 else if (fl
->fl_flags
& FL_FLOCK
)
971 lsp
= nfs4_get_lock_state(state
, NULL
, fl
->fl_pid
,
972 NFS4_FLOCK_LOCK_TYPE
);
977 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
978 fl
->fl_ops
= &nfs4_fl_lock_ops
;
982 static int nfs4_copy_lock_stateid(nfs4_stateid
*dst
,
983 struct nfs4_state
*state
,
984 const struct nfs_lockowner
*lockowner
)
986 struct nfs4_lock_state
*lsp
;
992 if (lockowner
== NULL
)
995 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
998 fl_owner
= lockowner
->l_owner
;
999 fl_pid
= lockowner
->l_pid
;
1000 spin_lock(&state
->state_lock
);
1001 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
1002 if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
1003 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
1006 if (!list_empty(&lsp
->ls_seqid
.list
))
1009 spin_unlock(&state
->state_lock
);
1010 nfs4_put_lock_state(lsp
);
1015 static int nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
1017 const nfs4_stateid
*src
;
1022 src
= &zero_stateid
;
1023 seq
= read_seqbegin(&state
->seqlock
);
1024 if (test_bit(NFS_OPEN_STATE
, &state
->flags
))
1025 src
= &state
->open_stateid
;
1026 nfs4_stateid_copy(dst
, src
);
1029 if (!list_empty(&state
->owner
->so_seqid
.list
))
1031 } while (read_seqretry(&state
->seqlock
, seq
));
1036 * Byte-range lock aware utility to initialize the stateid of read/write
1039 int nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
1040 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
1043 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
))
1045 ret
= nfs4_copy_lock_stateid(dst
, state
, lockowner
);
1048 ret
= nfs4_copy_open_stateid(dst
, state
);
1050 if (nfs_server_capable(state
->inode
, NFS_CAP_STATEID_NFSV41
))
1055 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1057 struct nfs_seqid
*new;
1059 new = kmalloc(sizeof(*new), gfp_mask
);
1061 new->sequence
= counter
;
1062 INIT_LIST_HEAD(&new->list
);
1068 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1070 struct nfs_seqid_counter
*sequence
;
1072 if (list_empty(&seqid
->list
))
1074 sequence
= seqid
->sequence
;
1075 spin_lock(&sequence
->lock
);
1076 list_del_init(&seqid
->list
);
1077 if (!list_empty(&sequence
->list
)) {
1078 struct nfs_seqid
*next
;
1080 next
= list_first_entry(&sequence
->list
,
1081 struct nfs_seqid
, list
);
1082 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1084 spin_unlock(&sequence
->lock
);
1087 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1089 nfs_release_seqid(seqid
);
1094 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1095 * failed with a seqid incrementing error -
1096 * see comments nfs_fs.h:seqid_mutating_error()
1098 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1103 case -NFS4ERR_BAD_SEQID
:
1104 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1106 pr_warn_ratelimited("NFS: v4 server returned a bad"
1107 " sequence-id error on an"
1108 " unconfirmed sequence %p!\n",
1110 case -NFS4ERR_STALE_CLIENTID
:
1111 case -NFS4ERR_STALE_STATEID
:
1112 case -NFS4ERR_BAD_STATEID
:
1113 case -NFS4ERR_BADXDR
:
1114 case -NFS4ERR_RESOURCE
:
1115 case -NFS4ERR_NOFILEHANDLE
:
1116 /* Non-seqid mutating errors */
1120 * Note: no locking needed as we are guaranteed to be first
1121 * on the sequence list
1123 seqid
->sequence
->counter
++;
1126 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1128 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1129 struct nfs4_state_owner
, so_seqid
);
1130 struct nfs_server
*server
= sp
->so_server
;
1132 if (status
== -NFS4ERR_BAD_SEQID
)
1133 nfs4_drop_state_owner(sp
);
1134 if (!nfs4_has_session(server
->nfs_client
))
1135 nfs_increment_seqid(status
, seqid
);
1139 * Increment the seqid if the LOCK/LOCKU succeeded, or
1140 * failed with a seqid incrementing error -
1141 * see comments nfs_fs.h:seqid_mutating_error()
1143 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1145 nfs_increment_seqid(status
, seqid
);
1148 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1150 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1153 spin_lock(&sequence
->lock
);
1155 if (list_empty(&seqid
->list
))
1156 list_add_tail(&seqid
->list
, &sequence
->list
);
1157 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1159 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1162 spin_unlock(&sequence
->lock
);
1166 static int nfs4_run_state_manager(void *);
1168 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1170 smp_mb__before_clear_bit();
1171 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1172 smp_mb__after_clear_bit();
1173 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1174 rpc_wake_up(&clp
->cl_rpcwaitq
);
1178 * Schedule the nfs_client asynchronous state management routine
1180 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1182 struct task_struct
*task
;
1183 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1185 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1187 __module_get(THIS_MODULE
);
1188 atomic_inc(&clp
->cl_count
);
1190 /* The rcu_read_lock() is not strictly necessary, as the state
1191 * manager is the only thread that ever changes the rpc_xprt
1192 * after it's initialized. At this point, we're single threaded. */
1194 snprintf(buf
, sizeof(buf
), "%s-manager",
1195 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1197 task
= kthread_run(nfs4_run_state_manager
, clp
, buf
);
1199 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1200 __func__
, PTR_ERR(task
));
1201 nfs4_clear_state_manager_bit(clp
);
1202 nfs_put_client(clp
);
1203 module_put(THIS_MODULE
);
1208 * Schedule a lease recovery attempt
1210 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1214 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1215 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1216 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1218 nfs4_schedule_state_manager(clp
);
1220 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1222 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1228 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1229 nfs_wait_bit_killable
, TASK_KILLABLE
);
1233 if (clp
->cl_cons_state
< 0)
1234 return clp
->cl_cons_state
;
1238 int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1243 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1244 ret
= nfs4_wait_clnt_recover(clp
);
1247 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1248 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1250 nfs4_schedule_state_manager(clp
);
1257 * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
1258 * @clp: client to process
1260 * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a
1261 * resend of the SETCLIENTID and hence re-establish the
1262 * callback channel. Then return all existing delegations.
1264 static void nfs40_handle_cb_pathdown(struct nfs_client
*clp
)
1266 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1267 nfs_expire_all_delegations(clp
);
1268 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__
,
1272 void nfs4_schedule_path_down_recovery(struct nfs_client
*clp
)
1274 nfs40_handle_cb_pathdown(clp
);
1275 nfs4_schedule_state_manager(clp
);
1278 static int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
1281 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1282 /* Don't recover state that expired before the reboot */
1283 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
1284 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1287 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
1288 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1292 static int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
1294 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
1295 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1296 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
1297 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
1301 int nfs4_schedule_stateid_recovery(const struct nfs_server
*server
, struct nfs4_state
*state
)
1303 struct nfs_client
*clp
= server
->nfs_client
;
1305 if (!nfs4_valid_open_stateid(state
))
1307 nfs4_state_mark_reclaim_nograce(clp
, state
);
1308 dprintk("%s: scheduling stateid recovery for server %s\n", __func__
,
1310 nfs4_schedule_state_manager(clp
);
1313 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery
);
1315 void nfs_inode_find_state_and_recover(struct inode
*inode
,
1316 const nfs4_stateid
*stateid
)
1318 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1319 struct nfs_inode
*nfsi
= NFS_I(inode
);
1320 struct nfs_open_context
*ctx
;
1321 struct nfs4_state
*state
;
1324 spin_lock(&inode
->i_lock
);
1325 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1329 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
1331 if (!nfs4_stateid_match(&state
->stateid
, stateid
))
1333 nfs4_state_mark_reclaim_nograce(clp
, state
);
1336 spin_unlock(&inode
->i_lock
);
1338 nfs4_schedule_state_manager(clp
);
1341 static void nfs4_state_mark_open_context_bad(struct nfs4_state
*state
)
1343 struct inode
*inode
= state
->inode
;
1344 struct nfs_inode
*nfsi
= NFS_I(inode
);
1345 struct nfs_open_context
*ctx
;
1347 spin_lock(&inode
->i_lock
);
1348 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1349 if (ctx
->state
!= state
)
1351 set_bit(NFS_CONTEXT_BAD
, &ctx
->flags
);
1353 spin_unlock(&inode
->i_lock
);
1356 static void nfs4_state_mark_recovery_failed(struct nfs4_state
*state
, int error
)
1358 set_bit(NFS_STATE_RECOVERY_FAILED
, &state
->flags
);
1359 nfs4_state_mark_open_context_bad(state
);
1363 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
1365 struct inode
*inode
= state
->inode
;
1366 struct nfs_inode
*nfsi
= NFS_I(inode
);
1367 struct file_lock
*fl
;
1370 if (inode
->i_flock
== NULL
)
1373 /* Guard against delegation returns and new lock/unlock calls */
1374 down_write(&nfsi
->rwsem
);
1375 /* Protect inode->i_flock using the BKL */
1377 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
1378 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
1380 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1383 status
= ops
->recover_lock(state
, fl
);
1388 case -NFS4ERR_ADMIN_REVOKED
:
1389 case -NFS4ERR_STALE_STATEID
:
1390 case -NFS4ERR_BAD_STATEID
:
1391 case -NFS4ERR_EXPIRED
:
1392 case -NFS4ERR_NO_GRACE
:
1393 case -NFS4ERR_STALE_CLIENTID
:
1394 case -NFS4ERR_BADSESSION
:
1395 case -NFS4ERR_BADSLOT
:
1396 case -NFS4ERR_BAD_HIGH_SLOT
:
1397 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1400 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1401 "Zeroing state\n", __func__
, status
);
1403 case -NFS4ERR_DENIED
:
1404 case -NFS4ERR_RECLAIM_BAD
:
1405 case -NFS4ERR_RECLAIM_CONFLICT
:
1406 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1413 up_write(&nfsi
->rwsem
);
1417 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1419 struct nfs4_state
*state
;
1420 struct nfs4_lock_state
*lock
;
1423 /* Note: we rely on the sp->so_states list being ordered
1424 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1426 * This is needed to ensure that the server won't give us any
1427 * read delegations that we have to return if, say, we are
1428 * recovering after a network partition or a reboot from a
1429 * server that doesn't support a grace period.
1431 spin_lock(&sp
->so_lock
);
1432 write_seqcount_begin(&sp
->so_reclaim_seqcount
);
1434 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1435 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1437 if (!nfs4_valid_open_stateid(state
))
1439 if (state
->state
== 0)
1441 atomic_inc(&state
->count
);
1442 spin_unlock(&sp
->so_lock
);
1443 status
= ops
->recover_open(sp
, state
);
1445 status
= nfs4_reclaim_locks(state
, ops
);
1447 spin_lock(&state
->state_lock
);
1448 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1449 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1450 pr_warn_ratelimited("NFS: "
1452 "failed!\n", __func__
);
1454 spin_unlock(&state
->state_lock
);
1455 nfs4_put_open_state(state
);
1456 spin_lock(&sp
->so_lock
);
1462 printk(KERN_ERR
"NFS: %s: unhandled error %d. "
1463 "Zeroing state\n", __func__
, status
);
1468 * Open state on this file cannot be recovered
1469 * All we can do is revert to using the zero stateid.
1471 nfs4_state_mark_recovery_failed(state
, status
);
1475 case -NFS4ERR_ADMIN_REVOKED
:
1476 case -NFS4ERR_STALE_STATEID
:
1477 case -NFS4ERR_BAD_STATEID
:
1478 case -NFS4ERR_RECLAIM_BAD
:
1479 case -NFS4ERR_RECLAIM_CONFLICT
:
1480 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1482 case -NFS4ERR_EXPIRED
:
1483 case -NFS4ERR_NO_GRACE
:
1484 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1485 case -NFS4ERR_STALE_CLIENTID
:
1486 case -NFS4ERR_BADSESSION
:
1487 case -NFS4ERR_BADSLOT
:
1488 case -NFS4ERR_BAD_HIGH_SLOT
:
1489 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1492 nfs4_put_open_state(state
);
1493 spin_lock(&sp
->so_lock
);
1496 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1497 spin_unlock(&sp
->so_lock
);
1500 nfs4_put_open_state(state
);
1501 spin_lock(&sp
->so_lock
);
1502 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1503 spin_unlock(&sp
->so_lock
);
1507 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1509 struct nfs4_lock_state
*lock
;
1511 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1512 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1513 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1514 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1515 spin_lock(&state
->state_lock
);
1516 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1517 lock
->ls_seqid
.flags
= 0;
1518 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1520 spin_unlock(&state
->state_lock
);
1523 static void nfs4_reset_seqids(struct nfs_server
*server
,
1524 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1526 struct nfs_client
*clp
= server
->nfs_client
;
1527 struct nfs4_state_owner
*sp
;
1528 struct rb_node
*pos
;
1529 struct nfs4_state
*state
;
1531 spin_lock(&clp
->cl_lock
);
1532 for (pos
= rb_first(&server
->state_owners
);
1534 pos
= rb_next(pos
)) {
1535 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1536 sp
->so_seqid
.flags
= 0;
1537 spin_lock(&sp
->so_lock
);
1538 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1539 if (mark_reclaim(clp
, state
))
1540 nfs4_clear_open_state(state
);
1542 spin_unlock(&sp
->so_lock
);
1544 spin_unlock(&clp
->cl_lock
);
1547 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1548 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1550 struct nfs_server
*server
;
1553 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1554 nfs4_reset_seqids(server
, mark_reclaim
);
1558 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1560 /* Mark all delegations for reclaim */
1561 nfs_delegation_mark_reclaim(clp
);
1562 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1565 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1566 const struct nfs4_state_recovery_ops
*ops
,
1567 struct rpc_cred
*cred
)
1569 /* Notify the server we're done reclaiming our state */
1570 if (ops
->reclaim_complete
)
1571 (void)ops
->reclaim_complete(clp
, cred
);
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 const struct nfs4_state_recovery_ops
*ops
;
1617 struct rpc_cred
*cred
;
1619 if (!nfs4_state_clear_reclaim_reboot(clp
))
1621 ops
= clp
->cl_mvops
->reboot_recovery_ops
;
1622 cred
= ops
->get_clid_cred(clp
);
1623 nfs4_reclaim_complete(clp
, ops
, cred
);
1627 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1629 nfs_delegation_mark_reclaim(clp
);
1630 nfs_delegation_reap_unclaimed(clp
);
1633 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1635 nfs_delegation_clear_all(clp
);
1636 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1639 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1644 case -NFS4ERR_CB_PATH_DOWN
:
1645 nfs40_handle_cb_pathdown(clp
);
1647 case -NFS4ERR_NO_GRACE
:
1648 nfs4_state_end_reclaim_reboot(clp
);
1650 case -NFS4ERR_STALE_CLIENTID
:
1651 case -NFS4ERR_LEASE_MOVED
:
1652 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1653 nfs4_state_clear_reclaim_reboot(clp
);
1654 nfs4_state_start_reclaim_reboot(clp
);
1656 case -NFS4ERR_EXPIRED
:
1657 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1658 nfs4_state_start_reclaim_nograce(clp
);
1660 case -NFS4ERR_BADSESSION
:
1661 case -NFS4ERR_BADSLOT
:
1662 case -NFS4ERR_BAD_HIGH_SLOT
:
1663 case -NFS4ERR_DEADSESSION
:
1664 case -NFS4ERR_SEQ_FALSE_RETRY
:
1665 case -NFS4ERR_SEQ_MISORDERED
:
1666 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1667 /* Zero session reset errors */
1669 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1670 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1673 dprintk("%s: failed to handle error %d for server %s\n",
1674 __func__
, error
, clp
->cl_hostname
);
1677 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1682 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1684 struct nfs4_state_owner
*sp
;
1685 struct nfs_server
*server
;
1686 struct rb_node
*pos
;
1691 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1692 nfs4_purge_state_owners(server
);
1693 spin_lock(&clp
->cl_lock
);
1694 for (pos
= rb_first(&server
->state_owners
);
1696 pos
= rb_next(pos
)) {
1698 struct nfs4_state_owner
, so_server_node
);
1699 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1702 atomic_inc(&sp
->so_count
);
1703 spin_unlock(&clp
->cl_lock
);
1706 status
= nfs4_reclaim_open_state(sp
, ops
);
1708 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1709 nfs4_put_state_owner(sp
);
1710 return nfs4_recovery_handle_error(clp
, status
);
1713 nfs4_put_state_owner(sp
);
1716 spin_unlock(&clp
->cl_lock
);
1722 static int nfs4_check_lease(struct nfs_client
*clp
)
1724 struct rpc_cred
*cred
;
1725 const struct nfs4_state_maintenance_ops
*ops
=
1726 clp
->cl_mvops
->state_renewal_ops
;
1729 /* Is the client already known to have an expired lease? */
1730 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1732 spin_lock(&clp
->cl_lock
);
1733 cred
= ops
->get_state_renewal_cred_locked(clp
);
1734 spin_unlock(&clp
->cl_lock
);
1736 cred
= nfs4_get_setclientid_cred(clp
);
1741 status
= ops
->renew_lease(clp
, cred
);
1743 if (status
== -ETIMEDOUT
) {
1744 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1748 return nfs4_recovery_handle_error(clp
, status
);
1751 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1752 * and for recoverable errors on EXCHANGE_ID for v4.1
1754 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1757 case -NFS4ERR_SEQ_MISORDERED
:
1758 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1759 return -ESERVERFAULT
;
1760 /* Lease confirmation error: retry after purging the lease */
1762 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1764 case -NFS4ERR_STALE_CLIENTID
:
1765 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1766 nfs4_state_clear_reclaim_reboot(clp
);
1767 nfs4_state_start_reclaim_reboot(clp
);
1769 case -NFS4ERR_CLID_INUSE
:
1770 pr_err("NFS: Server %s reports our clientid is in use\n",
1772 nfs_mark_client_ready(clp
, -EPERM
);
1773 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1776 case -NFS4ERR_DELAY
:
1782 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1783 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1784 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1785 dprintk("%s: exit with error %d for server %s\n",
1786 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1787 return -EPROTONOSUPPORT
;
1788 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1789 * in nfs4_exchange_id */
1791 dprintk("%s: exit with error %d for server %s\n", __func__
,
1792 status
, clp
->cl_hostname
);
1795 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1796 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1801 static int nfs4_establish_lease(struct nfs_client
*clp
)
1803 struct rpc_cred
*cred
;
1804 const struct nfs4_state_recovery_ops
*ops
=
1805 clp
->cl_mvops
->reboot_recovery_ops
;
1808 cred
= ops
->get_clid_cred(clp
);
1811 status
= ops
->establish_clid(clp
, cred
);
1815 pnfs_destroy_all_layouts(clp
);
1820 * Returns zero or a negative errno. NFS4ERR values are converted
1821 * to local errno values.
1823 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1827 status
= nfs4_establish_lease(clp
);
1829 return nfs4_handle_reclaim_lease_error(clp
, status
);
1830 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1831 nfs4_state_start_reclaim_nograce(clp
);
1832 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1833 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1834 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1835 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1839 static int nfs4_purge_lease(struct nfs_client
*clp
)
1843 status
= nfs4_establish_lease(clp
);
1845 return nfs4_handle_reclaim_lease_error(clp
, status
);
1846 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1847 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1848 nfs4_state_start_reclaim_nograce(clp
);
1853 * nfs4_discover_server_trunking - Detect server IP address trunking
1855 * @clp: nfs_client under test
1856 * @result: OUT: found nfs_client, or clp
1858 * Returns zero or a negative errno. If zero is returned,
1859 * an nfs_client pointer is planted in "result".
1861 * Note: since we are invoked in process context, and
1862 * not from inside the state manager, we cannot use
1863 * nfs4_handle_reclaim_lease_error().
1865 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
1866 struct nfs_client
**result
)
1868 const struct nfs4_state_recovery_ops
*ops
=
1869 clp
->cl_mvops
->reboot_recovery_ops
;
1870 struct rpc_clnt
*clnt
;
1871 struct rpc_cred
*cred
;
1874 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
1876 clnt
= clp
->cl_rpcclient
;
1879 mutex_lock(&nfs_clid_init_mutex
);
1882 cred
= ops
->get_clid_cred(clp
);
1886 status
= ops
->detect_trunking(clp
, result
, cred
);
1891 case -NFS4ERR_DELAY
:
1895 case -NFS4ERR_STALE_CLIENTID
:
1896 dprintk("NFS: %s after status %d, retrying\n",
1902 case -NFS4ERR_CLID_INUSE
:
1903 case -NFS4ERR_WRONGSEC
:
1904 clnt
= rpc_clone_client_set_auth(clnt
, RPC_AUTH_UNIX
);
1906 status
= PTR_ERR(clnt
);
1909 /* Note: this is safe because we haven't yet marked the
1910 * client as ready, so we are the only user of
1913 clnt
= xchg(&clp
->cl_rpcclient
, clnt
);
1914 rpc_shutdown_client(clnt
);
1915 clnt
= clp
->cl_rpcclient
;
1918 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1919 status
= -EPROTONOSUPPORT
;
1923 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1924 * in nfs4_exchange_id */
1925 status
= -EKEYEXPIRED
;
1928 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
1934 mutex_unlock(&nfs_clid_init_mutex
);
1935 dprintk("NFS: %s: status = %d\n", __func__
, status
);
1939 #ifdef CONFIG_NFS_V4_1
1940 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
1942 struct nfs_client
*clp
= session
->clp
;
1946 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1948 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1949 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1951 nfs4_schedule_lease_recovery(clp
);
1953 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
1955 static void nfs41_ping_server(struct nfs_client
*clp
)
1957 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
1958 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1959 nfs4_schedule_state_manager(clp
);
1962 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
1964 nfs41_ping_server(clp
);
1967 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
1969 nfs41_ping_server(clp
);
1972 static void nfs4_reset_all_state(struct nfs_client
*clp
)
1974 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1975 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1976 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1977 nfs4_state_start_reclaim_nograce(clp
);
1978 dprintk("%s: scheduling reset of all state for server %s!\n",
1979 __func__
, clp
->cl_hostname
);
1980 nfs4_schedule_state_manager(clp
);
1984 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
1986 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1987 nfs4_state_start_reclaim_reboot(clp
);
1988 dprintk("%s: server %s rebooted!\n", __func__
,
1990 nfs4_schedule_state_manager(clp
);
1994 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
1996 nfs4_reset_all_state(clp
);
1997 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
2000 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
2002 /* This will need to handle layouts too */
2003 nfs_expire_all_delegations(clp
);
2004 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
2008 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
2010 nfs_expire_all_delegations(clp
);
2011 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
2012 nfs4_schedule_state_manager(clp
);
2013 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
2017 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
2019 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2020 &clp
->cl_state
) == 0)
2021 nfs4_schedule_state_manager(clp
);
2024 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
2029 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2030 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
2032 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2033 nfs41_handle_server_reboot(clp
);
2034 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2035 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2036 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
2037 SEQ4_STATUS_LEASE_MOVED
))
2038 nfs41_handle_state_revoked(clp
);
2039 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2040 nfs41_handle_recallable_state_revoked(clp
);
2041 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2042 nfs41_handle_backchannel_fault(clp
);
2043 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2044 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2045 nfs41_handle_cb_path_down(clp
);
2048 static int nfs4_reset_session(struct nfs_client
*clp
)
2050 struct rpc_cred
*cred
;
2053 if (!nfs4_has_session(clp
))
2055 nfs4_begin_drain_session(clp
);
2056 cred
= nfs4_get_exchange_id_cred(clp
);
2057 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2060 case -NFS4ERR_BADSESSION
:
2061 case -NFS4ERR_DEADSESSION
:
2063 case -NFS4ERR_BACK_CHAN_BUSY
:
2064 case -NFS4ERR_DELAY
:
2065 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2070 status
= nfs4_recovery_handle_error(clp
, status
);
2074 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2075 status
= nfs4_proc_create_session(clp
, cred
);
2077 dprintk("%s: session reset failed with status %d for server %s!\n",
2078 __func__
, status
, clp
->cl_hostname
);
2079 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2082 nfs41_finish_session_reset(clp
);
2083 dprintk("%s: session reset was successful for server %s!\n",
2084 __func__
, clp
->cl_hostname
);
2091 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2093 struct rpc_cred
*cred
;
2096 if (!nfs4_has_session(clp
))
2098 nfs4_begin_drain_session(clp
);
2099 cred
= nfs4_get_exchange_id_cred(clp
);
2100 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2103 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2106 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2107 __func__
, clp
->cl_hostname
);
2109 case -NFS4ERR_DELAY
:
2111 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2114 return nfs4_recovery_handle_error(clp
, ret
);
2118 #else /* CONFIG_NFS_V4_1 */
2119 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2120 static int nfs4_end_drain_session(struct nfs_client
*clp
) { return 0; }
2122 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2126 #endif /* CONFIG_NFS_V4_1 */
2128 static void nfs4_state_manager(struct nfs_client
*clp
)
2131 const char *section
= "", *section_sep
= "";
2133 /* Ensure exclusive access to NFSv4 state */
2135 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2136 section
= "purge state";
2137 status
= nfs4_purge_lease(clp
);
2143 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2144 section
= "lease expired";
2145 /* We're going to have to re-establish a clientid */
2146 status
= nfs4_reclaim_lease(clp
);
2152 /* Initialize or reset the session */
2153 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2154 section
= "reset session";
2155 status
= nfs4_reset_session(clp
);
2156 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2162 /* Send BIND_CONN_TO_SESSION */
2163 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2165 section
= "bind conn to session";
2166 status
= nfs4_bind_conn_to_session(clp
);
2172 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2173 section
= "check lease";
2174 status
= nfs4_check_lease(clp
);
2180 /* First recover reboot state... */
2181 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2182 section
= "reclaim reboot";
2183 status
= nfs4_do_reclaim(clp
,
2184 clp
->cl_mvops
->reboot_recovery_ops
);
2185 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2186 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
2188 nfs4_state_end_reclaim_reboot(clp
);
2189 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
2195 /* Now recover expired state... */
2196 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2197 section
= "reclaim nograce";
2198 status
= nfs4_do_reclaim(clp
,
2199 clp
->cl_mvops
->nograce_recovery_ops
);
2200 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2201 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
2202 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
2208 nfs4_end_drain_session(clp
);
2209 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2210 nfs_client_return_marked_delegations(clp
);
2214 nfs4_clear_state_manager_bit(clp
);
2215 /* Did we race with an attempt to give us more work? */
2216 if (clp
->cl_state
== 0)
2218 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2220 } while (atomic_read(&clp
->cl_count
) > 1);
2223 if (strlen(section
))
2225 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2226 " with error %d\n", section_sep
, section
,
2227 clp
->cl_hostname
, -status
);
2229 nfs4_end_drain_session(clp
);
2230 nfs4_clear_state_manager_bit(clp
);
2233 static int nfs4_run_state_manager(void *ptr
)
2235 struct nfs_client
*clp
= ptr
;
2237 allow_signal(SIGKILL
);
2238 nfs4_state_manager(clp
);
2239 nfs_put_client(clp
);
2240 module_put_and_exit(0);