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 void nfs4_root_machine_cred(struct nfs_client
*clp
)
159 struct rpc_cred
*cred
, *new;
161 new = rpc_lookup_machine_cred(NULL
);
162 spin_lock(&clp
->cl_lock
);
163 cred
= clp
->cl_machine_cred
;
164 clp
->cl_machine_cred
= new;
165 spin_unlock(&clp
->cl_lock
);
170 static struct rpc_cred
*
171 nfs4_get_renew_cred_server_locked(struct nfs_server
*server
)
173 struct rpc_cred
*cred
= NULL
;
174 struct nfs4_state_owner
*sp
;
177 for (pos
= rb_first(&server
->state_owners
);
179 pos
= rb_next(pos
)) {
180 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
181 if (list_empty(&sp
->so_states
))
183 cred
= get_rpccred(sp
->so_cred
);
190 * nfs4_get_renew_cred_locked - Acquire credential for a renew operation
191 * @clp: client state handle
193 * Returns an rpc_cred with reference count bumped, or NULL.
194 * Caller must hold clp->cl_lock.
196 struct rpc_cred
*nfs4_get_renew_cred_locked(struct nfs_client
*clp
)
198 struct rpc_cred
*cred
= NULL
;
199 struct nfs_server
*server
;
201 /* Use machine credentials if available */
202 cred
= nfs4_get_machine_cred_locked(clp
);
207 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
208 cred
= nfs4_get_renew_cred_server_locked(server
);
218 static void nfs4_end_drain_slot_table(struct nfs4_slot_table
*tbl
)
220 if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_state
)) {
221 spin_lock(&tbl
->slot_tbl_lock
);
222 nfs41_wake_slot_table(tbl
);
223 spin_unlock(&tbl
->slot_tbl_lock
);
227 static void nfs4_end_drain_session(struct nfs_client
*clp
)
229 struct nfs4_session
*ses
= clp
->cl_session
;
231 if (clp
->cl_slot_tbl
) {
232 nfs4_end_drain_slot_table(clp
->cl_slot_tbl
);
237 nfs4_end_drain_slot_table(&ses
->bc_slot_table
);
238 nfs4_end_drain_slot_table(&ses
->fc_slot_table
);
242 static int nfs4_drain_slot_tbl(struct nfs4_slot_table
*tbl
)
244 set_bit(NFS4_SLOT_TBL_DRAINING
, &tbl
->slot_tbl_state
);
245 spin_lock(&tbl
->slot_tbl_lock
);
246 if (tbl
->highest_used_slotid
!= NFS4_NO_SLOT
) {
247 reinit_completion(&tbl
->complete
);
248 spin_unlock(&tbl
->slot_tbl_lock
);
249 return wait_for_completion_interruptible(&tbl
->complete
);
251 spin_unlock(&tbl
->slot_tbl_lock
);
255 static int nfs4_begin_drain_session(struct nfs_client
*clp
)
257 struct nfs4_session
*ses
= clp
->cl_session
;
260 if (clp
->cl_slot_tbl
)
261 return nfs4_drain_slot_tbl(clp
->cl_slot_tbl
);
264 ret
= nfs4_drain_slot_tbl(&ses
->bc_slot_table
);
268 return nfs4_drain_slot_tbl(&ses
->fc_slot_table
);
271 #if defined(CONFIG_NFS_V4_1)
273 static int nfs41_setup_state_renewal(struct nfs_client
*clp
)
276 struct nfs_fsinfo fsinfo
;
278 if (!test_bit(NFS_CS_CHECK_LEASE_TIME
, &clp
->cl_res_state
)) {
279 nfs4_schedule_state_renewal(clp
);
283 status
= nfs4_proc_get_lease_time(clp
, &fsinfo
);
285 /* Update lease time and schedule renewal */
286 spin_lock(&clp
->cl_lock
);
287 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
288 clp
->cl_last_renewal
= jiffies
;
289 spin_unlock(&clp
->cl_lock
);
291 nfs4_schedule_state_renewal(clp
);
297 static void nfs41_finish_session_reset(struct nfs_client
*clp
)
299 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
300 clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
301 /* create_session negotiated new slot table */
302 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
303 nfs41_setup_state_renewal(clp
);
306 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
310 if (test_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
))
312 nfs4_begin_drain_session(clp
);
313 status
= nfs4_proc_exchange_id(clp
, cred
);
316 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
318 status
= nfs4_proc_create_session(clp
, cred
);
321 nfs41_finish_session_reset(clp
);
322 nfs_mark_client_ready(clp
, NFS_CS_READY
);
328 * nfs41_discover_server_trunking - Detect server IP address trunking (mv1)
330 * @clp: nfs_client under test
331 * @result: OUT: found nfs_client, or clp
332 * @cred: credential to use for trunking test
334 * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status.
335 * If NFS4_OK is returned, an nfs_client pointer is planted in
338 * Note: The returned client may not yet be marked ready.
340 int nfs41_discover_server_trunking(struct nfs_client
*clp
,
341 struct nfs_client
**result
,
342 struct rpc_cred
*cred
)
346 status
= nfs4_proc_exchange_id(clp
, cred
);
347 if (status
!= NFS4_OK
)
349 set_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
351 return nfs41_walk_client_list(clp
, result
, cred
);
354 #endif /* CONFIG_NFS_V4_1 */
357 * nfs4_get_clid_cred - Acquire credential for a setclientid operation
358 * @clp: client state handle
360 * Returns an rpc_cred with reference count bumped, or NULL.
362 struct rpc_cred
*nfs4_get_clid_cred(struct nfs_client
*clp
)
364 struct rpc_cred
*cred
;
366 spin_lock(&clp
->cl_lock
);
367 cred
= nfs4_get_machine_cred_locked(clp
);
368 spin_unlock(&clp
->cl_lock
);
372 static struct nfs4_state_owner
*
373 nfs4_find_state_owner_locked(struct nfs_server
*server
, struct rpc_cred
*cred
)
375 struct rb_node
**p
= &server
->state_owners
.rb_node
,
377 struct nfs4_state_owner
*sp
;
381 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
383 if (cred
< sp
->so_cred
)
384 p
= &parent
->rb_left
;
385 else if (cred
> sp
->so_cred
)
386 p
= &parent
->rb_right
;
388 if (!list_empty(&sp
->so_lru
))
389 list_del_init(&sp
->so_lru
);
390 atomic_inc(&sp
->so_count
);
397 static struct nfs4_state_owner
*
398 nfs4_insert_state_owner_locked(struct nfs4_state_owner
*new)
400 struct nfs_server
*server
= new->so_server
;
401 struct rb_node
**p
= &server
->state_owners
.rb_node
,
403 struct nfs4_state_owner
*sp
;
408 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_server_node
);
410 if (new->so_cred
< sp
->so_cred
)
411 p
= &parent
->rb_left
;
412 else if (new->so_cred
> sp
->so_cred
)
413 p
= &parent
->rb_right
;
415 if (!list_empty(&sp
->so_lru
))
416 list_del_init(&sp
->so_lru
);
417 atomic_inc(&sp
->so_count
);
421 err
= ida_get_new(&server
->openowner_id
, &new->so_seqid
.owner_id
);
424 rb_link_node(&new->so_server_node
, parent
, p
);
425 rb_insert_color(&new->so_server_node
, &server
->state_owners
);
430 nfs4_remove_state_owner_locked(struct nfs4_state_owner
*sp
)
432 struct nfs_server
*server
= sp
->so_server
;
434 if (!RB_EMPTY_NODE(&sp
->so_server_node
))
435 rb_erase(&sp
->so_server_node
, &server
->state_owners
);
436 ida_remove(&server
->openowner_id
, sp
->so_seqid
.owner_id
);
440 nfs4_init_seqid_counter(struct nfs_seqid_counter
*sc
)
442 sc
->create_time
= ktime_get();
445 spin_lock_init(&sc
->lock
);
446 INIT_LIST_HEAD(&sc
->list
);
447 rpc_init_wait_queue(&sc
->wait
, "Seqid_waitqueue");
451 nfs4_destroy_seqid_counter(struct nfs_seqid_counter
*sc
)
453 rpc_destroy_wait_queue(&sc
->wait
);
457 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
458 * create a new state_owner.
461 static struct nfs4_state_owner
*
462 nfs4_alloc_state_owner(struct nfs_server
*server
,
463 struct rpc_cred
*cred
,
466 struct nfs4_state_owner
*sp
;
468 sp
= kzalloc(sizeof(*sp
), gfp_flags
);
471 sp
->so_server
= server
;
472 sp
->so_cred
= get_rpccred(cred
);
473 spin_lock_init(&sp
->so_lock
);
474 INIT_LIST_HEAD(&sp
->so_states
);
475 nfs4_init_seqid_counter(&sp
->so_seqid
);
476 atomic_set(&sp
->so_count
, 1);
477 INIT_LIST_HEAD(&sp
->so_lru
);
478 seqcount_init(&sp
->so_reclaim_seqcount
);
479 mutex_init(&sp
->so_delegreturn_mutex
);
484 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
486 struct rb_node
*rb_node
= &sp
->so_server_node
;
488 if (!RB_EMPTY_NODE(rb_node
)) {
489 struct nfs_server
*server
= sp
->so_server
;
490 struct nfs_client
*clp
= server
->nfs_client
;
492 spin_lock(&clp
->cl_lock
);
493 if (!RB_EMPTY_NODE(rb_node
)) {
494 rb_erase(rb_node
, &server
->state_owners
);
495 RB_CLEAR_NODE(rb_node
);
497 spin_unlock(&clp
->cl_lock
);
501 static void nfs4_free_state_owner(struct nfs4_state_owner
*sp
)
503 nfs4_destroy_seqid_counter(&sp
->so_seqid
);
504 put_rpccred(sp
->so_cred
);
508 static void nfs4_gc_state_owners(struct nfs_server
*server
)
510 struct nfs_client
*clp
= server
->nfs_client
;
511 struct nfs4_state_owner
*sp
, *tmp
;
512 unsigned long time_min
, time_max
;
515 spin_lock(&clp
->cl_lock
);
517 time_min
= (long)time_max
- (long)clp
->cl_lease_time
;
518 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
519 /* NB: LRU is sorted so that oldest is at the head */
520 if (time_in_range(sp
->so_expires
, time_min
, time_max
))
522 list_move(&sp
->so_lru
, &doomed
);
523 nfs4_remove_state_owner_locked(sp
);
525 spin_unlock(&clp
->cl_lock
);
527 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
528 list_del(&sp
->so_lru
);
529 nfs4_free_state_owner(sp
);
534 * nfs4_get_state_owner - Look up a state owner given a credential
535 * @server: nfs_server to search
536 * @cred: RPC credential to match
538 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
540 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
,
541 struct rpc_cred
*cred
,
544 struct nfs_client
*clp
= server
->nfs_client
;
545 struct nfs4_state_owner
*sp
, *new;
547 spin_lock(&clp
->cl_lock
);
548 sp
= nfs4_find_state_owner_locked(server
, cred
);
549 spin_unlock(&clp
->cl_lock
);
552 new = nfs4_alloc_state_owner(server
, cred
, gfp_flags
);
556 if (ida_pre_get(&server
->openowner_id
, gfp_flags
) == 0)
558 spin_lock(&clp
->cl_lock
);
559 sp
= nfs4_insert_state_owner_locked(new);
560 spin_unlock(&clp
->cl_lock
);
561 } while (sp
== ERR_PTR(-EAGAIN
));
563 nfs4_free_state_owner(new);
565 nfs4_gc_state_owners(server
);
570 * nfs4_put_state_owner - Release a nfs4_state_owner
571 * @sp: state owner data to release
573 * Note that we keep released state owners on an LRU
575 * This caches valid state owners so that they can be
576 * reused, to avoid the OPEN_CONFIRM on minor version 0.
577 * It also pins the uniquifier of dropped state owners for
578 * a while, to ensure that those state owner names are
581 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
583 struct nfs_server
*server
= sp
->so_server
;
584 struct nfs_client
*clp
= server
->nfs_client
;
586 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
589 sp
->so_expires
= jiffies
;
590 list_add_tail(&sp
->so_lru
, &server
->state_owners_lru
);
591 spin_unlock(&clp
->cl_lock
);
595 * nfs4_purge_state_owners - Release all cached state owners
596 * @server: nfs_server with cached state owners to release
598 * Called at umount time. Remaining state owners will be on
599 * the LRU with ref count of zero.
601 void nfs4_purge_state_owners(struct nfs_server
*server
)
603 struct nfs_client
*clp
= server
->nfs_client
;
604 struct nfs4_state_owner
*sp
, *tmp
;
607 spin_lock(&clp
->cl_lock
);
608 list_for_each_entry_safe(sp
, tmp
, &server
->state_owners_lru
, so_lru
) {
609 list_move(&sp
->so_lru
, &doomed
);
610 nfs4_remove_state_owner_locked(sp
);
612 spin_unlock(&clp
->cl_lock
);
614 list_for_each_entry_safe(sp
, tmp
, &doomed
, so_lru
) {
615 list_del(&sp
->so_lru
);
616 nfs4_free_state_owner(sp
);
620 static struct nfs4_state
*
621 nfs4_alloc_open_state(void)
623 struct nfs4_state
*state
;
625 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
628 atomic_set(&state
->count
, 1);
629 INIT_LIST_HEAD(&state
->lock_states
);
630 spin_lock_init(&state
->state_lock
);
631 seqlock_init(&state
->seqlock
);
636 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
638 if (state
->state
== fmode
)
640 /* NB! List reordering - see the reclaim code for why. */
641 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
642 if (fmode
& FMODE_WRITE
)
643 list_move(&state
->open_states
, &state
->owner
->so_states
);
645 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
647 state
->state
= fmode
;
650 static struct nfs4_state
*
651 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
653 struct nfs_inode
*nfsi
= NFS_I(inode
);
654 struct nfs4_state
*state
;
656 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
657 if (state
->owner
!= owner
)
659 if (!nfs4_valid_open_stateid(state
))
661 if (atomic_inc_not_zero(&state
->count
))
668 nfs4_free_open_state(struct nfs4_state
*state
)
674 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
676 struct nfs4_state
*state
, *new;
677 struct nfs_inode
*nfsi
= NFS_I(inode
);
679 spin_lock(&inode
->i_lock
);
680 state
= __nfs4_find_state_byowner(inode
, owner
);
681 spin_unlock(&inode
->i_lock
);
684 new = nfs4_alloc_open_state();
685 spin_lock(&owner
->so_lock
);
686 spin_lock(&inode
->i_lock
);
687 state
= __nfs4_find_state_byowner(inode
, owner
);
688 if (state
== NULL
&& new != NULL
) {
690 state
->owner
= owner
;
691 atomic_inc(&owner
->so_count
);
692 list_add(&state
->inode_states
, &nfsi
->open_states
);
694 state
->inode
= inode
;
695 spin_unlock(&inode
->i_lock
);
696 /* Note: The reclaim code dictates that we add stateless
697 * and read-only stateids to the end of the list */
698 list_add_tail(&state
->open_states
, &owner
->so_states
);
699 spin_unlock(&owner
->so_lock
);
701 spin_unlock(&inode
->i_lock
);
702 spin_unlock(&owner
->so_lock
);
704 nfs4_free_open_state(new);
710 void nfs4_put_open_state(struct nfs4_state
*state
)
712 struct inode
*inode
= state
->inode
;
713 struct nfs4_state_owner
*owner
= state
->owner
;
715 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
717 spin_lock(&inode
->i_lock
);
718 list_del(&state
->inode_states
);
719 list_del(&state
->open_states
);
720 spin_unlock(&inode
->i_lock
);
721 spin_unlock(&owner
->so_lock
);
723 nfs4_free_open_state(state
);
724 nfs4_put_state_owner(owner
);
728 * Close the current file.
730 static void __nfs4_close(struct nfs4_state
*state
,
731 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
733 struct nfs4_state_owner
*owner
= state
->owner
;
737 atomic_inc(&owner
->so_count
);
738 /* Protect against nfs4_find_state() */
739 spin_lock(&owner
->so_lock
);
740 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
747 case FMODE_READ
|FMODE_WRITE
:
750 newstate
= FMODE_READ
|FMODE_WRITE
;
751 if (state
->n_rdwr
== 0) {
752 if (state
->n_rdonly
== 0) {
753 newstate
&= ~FMODE_READ
;
754 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
755 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
757 if (state
->n_wronly
== 0) {
758 newstate
&= ~FMODE_WRITE
;
759 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
760 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
763 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
765 nfs4_state_set_mode_locked(state
, newstate
);
766 spin_unlock(&owner
->so_lock
);
769 nfs4_put_open_state(state
);
770 nfs4_put_state_owner(owner
);
772 nfs4_do_close(state
, gfp_mask
, wait
);
775 void nfs4_close_state(struct nfs4_state
*state
, fmode_t fmode
)
777 __nfs4_close(state
, fmode
, GFP_NOFS
, 0);
780 void nfs4_close_sync(struct nfs4_state
*state
, fmode_t fmode
)
782 __nfs4_close(state
, fmode
, GFP_KERNEL
, 1);
786 * Search the state->lock_states for an existing lock_owner
787 * that is compatible with current->files
789 static struct nfs4_lock_state
*
790 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
)
792 struct nfs4_lock_state
*pos
;
793 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
794 if (pos
->ls_owner
!= fl_owner
)
796 atomic_inc(&pos
->ls_count
);
803 * Return a compatible lock_state. If no initialized lock_state structure
804 * exists, return an uninitialized one.
807 static struct nfs4_lock_state
*nfs4_alloc_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
)
809 struct nfs4_lock_state
*lsp
;
810 struct nfs_server
*server
= state
->owner
->so_server
;
812 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
815 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
816 atomic_set(&lsp
->ls_count
, 1);
817 lsp
->ls_state
= state
;
818 lsp
->ls_owner
= fl_owner
;
819 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
820 if (lsp
->ls_seqid
.owner_id
< 0)
822 INIT_LIST_HEAD(&lsp
->ls_locks
);
829 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
831 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
832 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
837 * Return a compatible lock_state. If no initialized lock_state structure
838 * exists, return an uninitialized one.
841 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
)
843 struct nfs4_lock_state
*lsp
, *new = NULL
;
846 spin_lock(&state
->state_lock
);
847 lsp
= __nfs4_find_lock_state(state
, owner
);
851 list_add(&new->ls_locks
, &state
->lock_states
);
852 set_bit(LK_STATE_IN_USE
, &state
->flags
);
857 spin_unlock(&state
->state_lock
);
858 new = nfs4_alloc_lock_state(state
, owner
);
862 spin_unlock(&state
->state_lock
);
864 nfs4_free_lock_state(state
->owner
->so_server
, new);
869 * Release reference to lock_state, and free it if we see that
870 * it is no longer in use
872 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
874 struct nfs_server
*server
;
875 struct nfs4_state
*state
;
879 state
= lsp
->ls_state
;
880 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
882 list_del(&lsp
->ls_locks
);
883 if (list_empty(&state
->lock_states
))
884 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
885 spin_unlock(&state
->state_lock
);
886 server
= state
->owner
->so_server
;
887 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
888 struct nfs_client
*clp
= server
->nfs_client
;
890 clp
->cl_mvops
->free_lock_state(server
, lsp
);
892 nfs4_free_lock_state(server
, lsp
);
895 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
897 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
899 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
900 atomic_inc(&lsp
->ls_count
);
903 static void nfs4_fl_release_lock(struct file_lock
*fl
)
905 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
908 static const struct file_lock_operations nfs4_fl_lock_ops
= {
909 .fl_copy_lock
= nfs4_fl_copy_lock
,
910 .fl_release_private
= nfs4_fl_release_lock
,
913 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
915 struct nfs4_lock_state
*lsp
;
917 if (fl
->fl_ops
!= NULL
)
919 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
);
922 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
923 fl
->fl_ops
= &nfs4_fl_lock_ops
;
927 static int nfs4_copy_lock_stateid(nfs4_stateid
*dst
,
928 struct nfs4_state
*state
,
929 const struct nfs_lockowner
*lockowner
)
931 struct nfs4_lock_state
*lsp
;
936 if (lockowner
== NULL
)
939 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
942 fl_owner
= lockowner
->l_owner
;
943 spin_lock(&state
->state_lock
);
944 lsp
= __nfs4_find_lock_state(state
, fl_owner
);
945 if (lsp
&& test_bit(NFS_LOCK_LOST
, &lsp
->ls_flags
))
947 else if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
948 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
951 spin_unlock(&state
->state_lock
);
952 nfs4_put_lock_state(lsp
);
957 static void nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
959 const nfs4_stateid
*src
;
964 seq
= read_seqbegin(&state
->seqlock
);
965 if (test_bit(NFS_OPEN_STATE
, &state
->flags
))
966 src
= &state
->open_stateid
;
967 nfs4_stateid_copy(dst
, src
);
968 } while (read_seqretry(&state
->seqlock
, seq
));
972 * Byte-range lock aware utility to initialize the stateid of read/write
975 int nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
976 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
978 int ret
= nfs4_copy_lock_stateid(dst
, state
, lockowner
);
980 /* A lost lock - don't even consider delegations */
982 /* returns true if delegation stateid found and copied */
983 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
)) {
988 /* nfs4_copy_delegation_stateid() didn't over-write
989 * dst, so it still has the lock stateid which we now
993 nfs4_copy_open_stateid(dst
, state
);
996 if (nfs_server_capable(state
->inode
, NFS_CAP_STATEID_NFSV41
))
1001 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1003 struct nfs_seqid
*new;
1005 new = kmalloc(sizeof(*new), gfp_mask
);
1007 new->sequence
= counter
;
1008 INIT_LIST_HEAD(&new->list
);
1014 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1016 struct nfs_seqid_counter
*sequence
;
1018 if (list_empty(&seqid
->list
))
1020 sequence
= seqid
->sequence
;
1021 spin_lock(&sequence
->lock
);
1022 list_del_init(&seqid
->list
);
1023 if (!list_empty(&sequence
->list
)) {
1024 struct nfs_seqid
*next
;
1026 next
= list_first_entry(&sequence
->list
,
1027 struct nfs_seqid
, list
);
1028 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1030 spin_unlock(&sequence
->lock
);
1033 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1035 nfs_release_seqid(seqid
);
1040 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1041 * failed with a seqid incrementing error -
1042 * see comments nfs4.h:seqid_mutating_error()
1044 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1049 case -NFS4ERR_BAD_SEQID
:
1050 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1052 pr_warn_ratelimited("NFS: v4 server returned a bad"
1053 " sequence-id error on an"
1054 " unconfirmed sequence %p!\n",
1056 case -NFS4ERR_STALE_CLIENTID
:
1057 case -NFS4ERR_STALE_STATEID
:
1058 case -NFS4ERR_BAD_STATEID
:
1059 case -NFS4ERR_BADXDR
:
1060 case -NFS4ERR_RESOURCE
:
1061 case -NFS4ERR_NOFILEHANDLE
:
1062 /* Non-seqid mutating errors */
1066 * Note: no locking needed as we are guaranteed to be first
1067 * on the sequence list
1069 seqid
->sequence
->counter
++;
1072 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1074 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1075 struct nfs4_state_owner
, so_seqid
);
1076 struct nfs_server
*server
= sp
->so_server
;
1078 if (status
== -NFS4ERR_BAD_SEQID
)
1079 nfs4_drop_state_owner(sp
);
1080 if (!nfs4_has_session(server
->nfs_client
))
1081 nfs_increment_seqid(status
, seqid
);
1085 * Increment the seqid if the LOCK/LOCKU succeeded, or
1086 * failed with a seqid incrementing error -
1087 * see comments nfs4.h:seqid_mutating_error()
1089 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1091 nfs_increment_seqid(status
, seqid
);
1094 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1096 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1099 spin_lock(&sequence
->lock
);
1101 if (list_empty(&seqid
->list
))
1102 list_add_tail(&seqid
->list
, &sequence
->list
);
1103 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1105 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1108 spin_unlock(&sequence
->lock
);
1112 static int nfs4_run_state_manager(void *);
1114 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1116 smp_mb__before_atomic();
1117 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1118 smp_mb__after_atomic();
1119 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1120 rpc_wake_up(&clp
->cl_rpcwaitq
);
1124 * Schedule the nfs_client asynchronous state management routine
1126 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1128 struct task_struct
*task
;
1129 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1131 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1133 __module_get(THIS_MODULE
);
1134 atomic_inc(&clp
->cl_count
);
1136 /* The rcu_read_lock() is not strictly necessary, as the state
1137 * manager is the only thread that ever changes the rpc_xprt
1138 * after it's initialized. At this point, we're single threaded. */
1140 snprintf(buf
, sizeof(buf
), "%s-manager",
1141 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1143 task
= kthread_run(nfs4_run_state_manager
, clp
, "%s", buf
);
1145 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1146 __func__
, PTR_ERR(task
));
1147 nfs4_clear_state_manager_bit(clp
);
1148 nfs_put_client(clp
);
1149 module_put(THIS_MODULE
);
1154 * Schedule a lease recovery attempt
1156 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1160 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1161 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1162 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1164 nfs4_schedule_state_manager(clp
);
1166 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1169 * nfs4_schedule_migration_recovery - trigger migration recovery
1171 * @server: FSID that is migrating
1173 * Returns zero if recovery has started, otherwise a negative NFS4ERR
1174 * value is returned.
1176 int nfs4_schedule_migration_recovery(const struct nfs_server
*server
)
1178 struct nfs_client
*clp
= server
->nfs_client
;
1180 if (server
->fh_expire_type
!= NFS4_FH_PERSISTENT
) {
1181 pr_err("NFS: volatile file handles not supported (server %s)\n",
1186 if (test_bit(NFS_MIG_FAILED
, &server
->mig_status
))
1189 dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n",
1191 (unsigned long long)server
->fsid
.major
,
1192 (unsigned long long)server
->fsid
.minor
,
1195 set_bit(NFS_MIG_IN_TRANSITION
,
1196 &((struct nfs_server
*)server
)->mig_status
);
1197 set_bit(NFS4CLNT_MOVED
, &clp
->cl_state
);
1199 nfs4_schedule_state_manager(clp
);
1202 EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery
);
1205 * nfs4_schedule_lease_moved_recovery - start lease-moved recovery
1207 * @clp: server to check for moved leases
1210 void nfs4_schedule_lease_moved_recovery(struct nfs_client
*clp
)
1212 dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n",
1213 __func__
, clp
->cl_clientid
, clp
->cl_hostname
);
1215 set_bit(NFS4CLNT_LEASE_MOVED
, &clp
->cl_state
);
1216 nfs4_schedule_state_manager(clp
);
1218 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery
);
1220 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1226 atomic_inc(&clp
->cl_count
);
1227 res
= wait_on_bit_action(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1228 nfs_wait_bit_killable
, TASK_KILLABLE
);
1231 if (clp
->cl_cons_state
< 0)
1232 res
= clp
->cl_cons_state
;
1234 nfs_put_client(clp
);
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 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
;
1369 struct file_lock_context
*flctx
= inode
->i_flctx
;
1370 struct list_head
*list
;
1375 list
= &flctx
->flc_posix
;
1377 /* Guard against delegation returns and new lock/unlock calls */
1378 down_write(&nfsi
->rwsem
);
1379 spin_lock(&flctx
->flc_lock
);
1381 list_for_each_entry(fl
, list
, fl_list
) {
1382 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1384 spin_unlock(&flctx
->flc_lock
);
1385 status
= ops
->recover_lock(state
, fl
);
1390 case -NFS4ERR_ADMIN_REVOKED
:
1391 case -NFS4ERR_STALE_STATEID
:
1392 case -NFS4ERR_BAD_STATEID
:
1393 case -NFS4ERR_EXPIRED
:
1394 case -NFS4ERR_NO_GRACE
:
1395 case -NFS4ERR_STALE_CLIENTID
:
1396 case -NFS4ERR_BADSESSION
:
1397 case -NFS4ERR_BADSLOT
:
1398 case -NFS4ERR_BAD_HIGH_SLOT
:
1399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1402 pr_err("NFS: %s: unhandled error %d\n",
1405 case -NFS4ERR_DENIED
:
1406 case -NFS4ERR_RECLAIM_BAD
:
1407 case -NFS4ERR_RECLAIM_CONFLICT
:
1408 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1411 spin_lock(&flctx
->flc_lock
);
1413 if (list
== &flctx
->flc_posix
) {
1414 list
= &flctx
->flc_flock
;
1417 spin_unlock(&flctx
->flc_lock
);
1419 up_write(&nfsi
->rwsem
);
1423 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1425 struct nfs4_state
*state
;
1426 struct nfs4_lock_state
*lock
;
1429 /* Note: we rely on the sp->so_states list being ordered
1430 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1432 * This is needed to ensure that the server won't give us any
1433 * read delegations that we have to return if, say, we are
1434 * recovering after a network partition or a reboot from a
1435 * server that doesn't support a grace period.
1437 spin_lock(&sp
->so_lock
);
1438 raw_write_seqcount_begin(&sp
->so_reclaim_seqcount
);
1440 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1441 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1443 if (!nfs4_valid_open_stateid(state
))
1445 if (state
->state
== 0)
1447 atomic_inc(&state
->count
);
1448 spin_unlock(&sp
->so_lock
);
1449 status
= ops
->recover_open(sp
, state
);
1451 status
= nfs4_reclaim_locks(state
, ops
);
1453 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
1454 spin_lock(&state
->state_lock
);
1455 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1456 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1457 pr_warn_ratelimited("NFS: "
1459 "failed!\n", __func__
);
1461 spin_unlock(&state
->state_lock
);
1463 nfs4_put_open_state(state
);
1464 spin_lock(&sp
->so_lock
);
1470 printk(KERN_ERR
"NFS: %s: unhandled error %d\n",
1475 /* Open state on this file cannot be recovered */
1476 nfs4_state_mark_recovery_failed(state
, status
);
1480 case -NFS4ERR_ADMIN_REVOKED
:
1481 case -NFS4ERR_STALE_STATEID
:
1482 case -NFS4ERR_BAD_STATEID
:
1483 case -NFS4ERR_RECLAIM_BAD
:
1484 case -NFS4ERR_RECLAIM_CONFLICT
:
1485 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1487 case -NFS4ERR_EXPIRED
:
1488 case -NFS4ERR_NO_GRACE
:
1489 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1490 case -NFS4ERR_STALE_CLIENTID
:
1491 case -NFS4ERR_BADSESSION
:
1492 case -NFS4ERR_BADSLOT
:
1493 case -NFS4ERR_BAD_HIGH_SLOT
:
1494 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1497 nfs4_put_open_state(state
);
1498 spin_lock(&sp
->so_lock
);
1501 raw_write_seqcount_end(&sp
->so_reclaim_seqcount
);
1502 spin_unlock(&sp
->so_lock
);
1505 nfs4_put_open_state(state
);
1506 spin_lock(&sp
->so_lock
);
1507 raw_write_seqcount_end(&sp
->so_reclaim_seqcount
);
1508 spin_unlock(&sp
->so_lock
);
1512 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1514 struct nfs4_lock_state
*lock
;
1516 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1517 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1518 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1519 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1520 spin_lock(&state
->state_lock
);
1521 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1522 lock
->ls_seqid
.flags
= 0;
1523 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1525 spin_unlock(&state
->state_lock
);
1528 static void nfs4_reset_seqids(struct nfs_server
*server
,
1529 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1531 struct nfs_client
*clp
= server
->nfs_client
;
1532 struct nfs4_state_owner
*sp
;
1533 struct rb_node
*pos
;
1534 struct nfs4_state
*state
;
1536 spin_lock(&clp
->cl_lock
);
1537 for (pos
= rb_first(&server
->state_owners
);
1539 pos
= rb_next(pos
)) {
1540 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1541 sp
->so_seqid
.flags
= 0;
1542 spin_lock(&sp
->so_lock
);
1543 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1544 if (mark_reclaim(clp
, state
))
1545 nfs4_clear_open_state(state
);
1547 spin_unlock(&sp
->so_lock
);
1549 spin_unlock(&clp
->cl_lock
);
1552 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1553 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1555 struct nfs_server
*server
;
1558 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1559 nfs4_reset_seqids(server
, mark_reclaim
);
1563 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1565 /* Mark all delegations for reclaim */
1566 nfs_delegation_mark_reclaim(clp
);
1567 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1570 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1571 const struct nfs4_state_recovery_ops
*ops
,
1572 struct rpc_cred
*cred
)
1574 /* Notify the server we're done reclaiming our state */
1575 if (ops
->reclaim_complete
)
1576 (void)ops
->reclaim_complete(clp
, cred
);
1579 static void nfs4_clear_reclaim_server(struct nfs_server
*server
)
1581 struct nfs_client
*clp
= server
->nfs_client
;
1582 struct nfs4_state_owner
*sp
;
1583 struct rb_node
*pos
;
1584 struct nfs4_state
*state
;
1586 spin_lock(&clp
->cl_lock
);
1587 for (pos
= rb_first(&server
->state_owners
);
1589 pos
= rb_next(pos
)) {
1590 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1591 spin_lock(&sp
->so_lock
);
1592 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1593 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
,
1596 nfs4_state_mark_reclaim_nograce(clp
, state
);
1598 spin_unlock(&sp
->so_lock
);
1600 spin_unlock(&clp
->cl_lock
);
1603 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1605 struct nfs_server
*server
;
1607 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1611 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1612 nfs4_clear_reclaim_server(server
);
1615 nfs_delegation_reap_unclaimed(clp
);
1619 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1621 const struct nfs4_state_recovery_ops
*ops
;
1622 struct rpc_cred
*cred
;
1624 if (!nfs4_state_clear_reclaim_reboot(clp
))
1626 ops
= clp
->cl_mvops
->reboot_recovery_ops
;
1627 cred
= nfs4_get_clid_cred(clp
);
1628 nfs4_reclaim_complete(clp
, ops
, cred
);
1632 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1634 nfs_delegation_mark_reclaim(clp
);
1635 nfs_delegation_reap_unclaimed(clp
);
1638 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1640 nfs_delegation_clear_all(clp
);
1641 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1644 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1649 case -NFS4ERR_CB_PATH_DOWN
:
1650 nfs40_handle_cb_pathdown(clp
);
1652 case -NFS4ERR_NO_GRACE
:
1653 nfs4_state_end_reclaim_reboot(clp
);
1655 case -NFS4ERR_STALE_CLIENTID
:
1656 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1657 nfs4_state_clear_reclaim_reboot(clp
);
1658 nfs4_state_start_reclaim_reboot(clp
);
1660 case -NFS4ERR_EXPIRED
:
1661 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1662 nfs4_state_start_reclaim_nograce(clp
);
1664 case -NFS4ERR_BADSESSION
:
1665 case -NFS4ERR_BADSLOT
:
1666 case -NFS4ERR_BAD_HIGH_SLOT
:
1667 case -NFS4ERR_DEADSESSION
:
1668 case -NFS4ERR_SEQ_FALSE_RETRY
:
1669 case -NFS4ERR_SEQ_MISORDERED
:
1670 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1671 /* Zero session reset errors */
1673 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1674 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1677 dprintk("%s: failed to handle error %d for server %s\n",
1678 __func__
, error
, clp
->cl_hostname
);
1681 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1686 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1688 struct nfs4_state_owner
*sp
;
1689 struct nfs_server
*server
;
1690 struct rb_node
*pos
;
1695 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1696 nfs4_purge_state_owners(server
);
1697 spin_lock(&clp
->cl_lock
);
1698 for (pos
= rb_first(&server
->state_owners
);
1700 pos
= rb_next(pos
)) {
1702 struct nfs4_state_owner
, so_server_node
);
1703 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1706 atomic_inc(&sp
->so_count
);
1707 spin_unlock(&clp
->cl_lock
);
1710 status
= nfs4_reclaim_open_state(sp
, ops
);
1712 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1713 nfs4_put_state_owner(sp
);
1714 status
= nfs4_recovery_handle_error(clp
, status
);
1715 return (status
!= 0) ? status
: -EAGAIN
;
1718 nfs4_put_state_owner(sp
);
1721 spin_unlock(&clp
->cl_lock
);
1727 static int nfs4_check_lease(struct nfs_client
*clp
)
1729 struct rpc_cred
*cred
;
1730 const struct nfs4_state_maintenance_ops
*ops
=
1731 clp
->cl_mvops
->state_renewal_ops
;
1734 /* Is the client already known to have an expired lease? */
1735 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1737 spin_lock(&clp
->cl_lock
);
1738 cred
= ops
->get_state_renewal_cred_locked(clp
);
1739 spin_unlock(&clp
->cl_lock
);
1741 cred
= nfs4_get_clid_cred(clp
);
1746 status
= ops
->renew_lease(clp
, cred
);
1748 if (status
== -ETIMEDOUT
) {
1749 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1753 return nfs4_recovery_handle_error(clp
, status
);
1756 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1757 * and for recoverable errors on EXCHANGE_ID for v4.1
1759 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1762 case -NFS4ERR_SEQ_MISORDERED
:
1763 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1764 return -ESERVERFAULT
;
1765 /* Lease confirmation error: retry after purging the lease */
1767 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1769 case -NFS4ERR_STALE_CLIENTID
:
1770 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1771 nfs4_state_start_reclaim_reboot(clp
);
1773 case -NFS4ERR_CLID_INUSE
:
1774 pr_err("NFS: Server %s reports our clientid is in use\n",
1776 nfs_mark_client_ready(clp
, -EPERM
);
1777 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1780 case -NFS4ERR_DELAY
:
1786 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1787 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1788 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1789 dprintk("%s: exit with error %d for server %s\n",
1790 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1791 return -EPROTONOSUPPORT
;
1792 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1793 * in nfs4_exchange_id */
1795 dprintk("%s: exit with error %d for server %s\n", __func__
,
1796 status
, clp
->cl_hostname
);
1799 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1800 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1805 static int nfs4_establish_lease(struct nfs_client
*clp
)
1807 struct rpc_cred
*cred
;
1808 const struct nfs4_state_recovery_ops
*ops
=
1809 clp
->cl_mvops
->reboot_recovery_ops
;
1812 cred
= nfs4_get_clid_cred(clp
);
1815 status
= ops
->establish_clid(clp
, cred
);
1819 pnfs_destroy_all_layouts(clp
);
1824 * Returns zero or a negative errno. NFS4ERR values are converted
1825 * to local errno values.
1827 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1831 status
= nfs4_establish_lease(clp
);
1833 return nfs4_handle_reclaim_lease_error(clp
, status
);
1834 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1835 nfs4_state_start_reclaim_nograce(clp
);
1836 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1837 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1838 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1839 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1843 static int nfs4_purge_lease(struct nfs_client
*clp
)
1847 status
= nfs4_establish_lease(clp
);
1849 return nfs4_handle_reclaim_lease_error(clp
, status
);
1850 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1851 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1852 nfs4_state_start_reclaim_nograce(clp
);
1857 * Try remote migration of one FSID from a source server to a
1858 * destination server. The source server provides a list of
1859 * potential destinations.
1861 * Returns zero or a negative NFS4ERR status code.
1863 static int nfs4_try_migration(struct nfs_server
*server
, struct rpc_cred
*cred
)
1865 struct nfs_client
*clp
= server
->nfs_client
;
1866 struct nfs4_fs_locations
*locations
= NULL
;
1867 struct inode
*inode
;
1871 dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__
,
1872 (unsigned long long)server
->fsid
.major
,
1873 (unsigned long long)server
->fsid
.minor
,
1877 page
= alloc_page(GFP_KERNEL
);
1878 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1879 if (page
== NULL
|| locations
== NULL
) {
1880 dprintk("<-- %s: no memory\n", __func__
);
1884 inode
= server
->super
->s_root
->d_inode
;
1885 result
= nfs4_proc_get_locations(inode
, locations
, page
, cred
);
1887 dprintk("<-- %s: failed to retrieve fs_locations: %d\n",
1892 result
= -NFS4ERR_NXIO
;
1893 if (!(locations
->fattr
.valid
& NFS_ATTR_FATTR_V4_LOCATIONS
)) {
1894 dprintk("<-- %s: No fs_locations data, migration skipped\n",
1899 nfs4_begin_drain_session(clp
);
1901 status
= nfs4_replace_transport(server
, locations
);
1903 dprintk("<-- %s: failed to replace transport: %d\n",
1909 dprintk("<-- %s: migration succeeded\n", __func__
);
1916 pr_err("NFS: migration recovery failed (server %s)\n",
1918 set_bit(NFS_MIG_FAILED
, &server
->mig_status
);
1924 * Returns zero or a negative NFS4ERR status code.
1926 static int nfs4_handle_migration(struct nfs_client
*clp
)
1928 const struct nfs4_state_maintenance_ops
*ops
=
1929 clp
->cl_mvops
->state_renewal_ops
;
1930 struct nfs_server
*server
;
1931 struct rpc_cred
*cred
;
1933 dprintk("%s: migration reported on \"%s\"\n", __func__
,
1936 spin_lock(&clp
->cl_lock
);
1937 cred
= ops
->get_state_renewal_cred_locked(clp
);
1938 spin_unlock(&clp
->cl_lock
);
1940 return -NFS4ERR_NOENT
;
1945 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1948 if (server
->mig_gen
== clp
->cl_mig_gen
)
1950 server
->mig_gen
= clp
->cl_mig_gen
;
1952 if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION
,
1953 &server
->mig_status
))
1957 status
= nfs4_try_migration(server
, cred
);
1970 * Test each nfs_server on the clp's cl_superblocks list to see
1971 * if it's moved to another server. Stop when the server no longer
1972 * returns NFS4ERR_LEASE_MOVED.
1974 static int nfs4_handle_lease_moved(struct nfs_client
*clp
)
1976 const struct nfs4_state_maintenance_ops
*ops
=
1977 clp
->cl_mvops
->state_renewal_ops
;
1978 struct nfs_server
*server
;
1979 struct rpc_cred
*cred
;
1981 dprintk("%s: lease moved reported on \"%s\"\n", __func__
,
1984 spin_lock(&clp
->cl_lock
);
1985 cred
= ops
->get_state_renewal_cred_locked(clp
);
1986 spin_unlock(&clp
->cl_lock
);
1988 return -NFS4ERR_NOENT
;
1993 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1994 struct inode
*inode
;
1997 if (server
->mig_gen
== clp
->cl_mig_gen
)
1999 server
->mig_gen
= clp
->cl_mig_gen
;
2003 inode
= server
->super
->s_root
->d_inode
;
2004 status
= nfs4_proc_fsid_present(inode
, cred
);
2005 if (status
!= -NFS4ERR_MOVED
)
2006 goto restart
; /* wasn't this one */
2007 if (nfs4_try_migration(server
, cred
) == -NFS4ERR_LEASE_MOVED
)
2008 goto restart
; /* there are more */
2019 * nfs4_discover_server_trunking - Detect server IP address trunking
2021 * @clp: nfs_client under test
2022 * @result: OUT: found nfs_client, or clp
2024 * Returns zero or a negative errno. If zero is returned,
2025 * an nfs_client pointer is planted in "result".
2027 * Note: since we are invoked in process context, and
2028 * not from inside the state manager, we cannot use
2029 * nfs4_handle_reclaim_lease_error().
2031 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
2032 struct nfs_client
**result
)
2034 const struct nfs4_state_recovery_ops
*ops
=
2035 clp
->cl_mvops
->reboot_recovery_ops
;
2036 struct rpc_clnt
*clnt
;
2037 struct rpc_cred
*cred
;
2040 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
2042 clnt
= clp
->cl_rpcclient
;
2045 mutex_lock(&nfs_clid_init_mutex
);
2048 cred
= nfs4_get_clid_cred(clp
);
2052 status
= ops
->detect_trunking(clp
, result
, cred
);
2058 if (clnt
->cl_softrtry
)
2060 case -NFS4ERR_DELAY
:
2063 case -NFS4ERR_STALE_CLIENTID
:
2064 dprintk("NFS: %s after status %d, retrying\n",
2069 nfs4_root_machine_cred(clp
);
2072 if (clnt
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
)
2074 case -NFS4ERR_CLID_INUSE
:
2075 case -NFS4ERR_WRONGSEC
:
2076 /* No point in retrying if we already used RPC_AUTH_UNIX */
2077 if (clnt
->cl_auth
->au_flavor
== RPC_AUTH_UNIX
) {
2081 clnt
= rpc_clone_client_set_auth(clnt
, RPC_AUTH_UNIX
);
2083 status
= PTR_ERR(clnt
);
2086 /* Note: this is safe because we haven't yet marked the
2087 * client as ready, so we are the only user of
2090 clnt
= xchg(&clp
->cl_rpcclient
, clnt
);
2091 rpc_shutdown_client(clnt
);
2092 clnt
= clp
->cl_rpcclient
;
2095 case -NFS4ERR_MINOR_VERS_MISMATCH
:
2096 status
= -EPROTONOSUPPORT
;
2100 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
2101 * in nfs4_exchange_id */
2102 status
= -EKEYEXPIRED
;
2105 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
2111 mutex_unlock(&nfs_clid_init_mutex
);
2112 dprintk("NFS: %s: status = %d\n", __func__
, status
);
2116 #ifdef CONFIG_NFS_V4_1
2117 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
2119 struct nfs_client
*clp
= session
->clp
;
2123 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2125 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
2126 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2128 nfs4_schedule_lease_recovery(clp
);
2130 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
2132 static void nfs41_ping_server(struct nfs_client
*clp
)
2134 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
2135 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
2136 nfs4_schedule_state_manager(clp
);
2139 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
2141 nfs41_ping_server(clp
);
2144 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
2146 nfs41_ping_server(clp
);
2149 static void nfs4_reset_all_state(struct nfs_client
*clp
)
2151 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
2152 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
2153 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
2154 nfs4_state_start_reclaim_nograce(clp
);
2155 dprintk("%s: scheduling reset of all state for server %s!\n",
2156 __func__
, clp
->cl_hostname
);
2157 nfs4_schedule_state_manager(clp
);
2161 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
2163 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
2164 nfs4_state_start_reclaim_reboot(clp
);
2165 dprintk("%s: server %s rebooted!\n", __func__
,
2167 nfs4_schedule_state_manager(clp
);
2171 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
2173 nfs4_reset_all_state(clp
);
2174 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
2177 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
2179 /* This will need to handle layouts too */
2180 nfs_expire_all_delegations(clp
);
2181 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
2185 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
2187 nfs_expire_all_delegations(clp
);
2188 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
2189 nfs4_schedule_state_manager(clp
);
2190 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
2194 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
2196 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2197 &clp
->cl_state
) == 0)
2198 nfs4_schedule_state_manager(clp
);
2201 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
2206 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2207 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
2209 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2210 nfs41_handle_server_reboot(clp
);
2211 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2212 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2213 SEQ4_STATUS_ADMIN_STATE_REVOKED
))
2214 nfs41_handle_state_revoked(clp
);
2215 if (flags
& SEQ4_STATUS_LEASE_MOVED
)
2216 nfs4_schedule_lease_moved_recovery(clp
);
2217 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2218 nfs41_handle_recallable_state_revoked(clp
);
2219 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2220 nfs41_handle_backchannel_fault(clp
);
2221 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2222 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2223 nfs41_handle_cb_path_down(clp
);
2226 static int nfs4_reset_session(struct nfs_client
*clp
)
2228 struct rpc_cred
*cred
;
2231 if (!nfs4_has_session(clp
))
2233 nfs4_begin_drain_session(clp
);
2234 cred
= nfs4_get_clid_cred(clp
);
2235 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2238 case -NFS4ERR_BADSESSION
:
2239 case -NFS4ERR_DEADSESSION
:
2241 case -NFS4ERR_BACK_CHAN_BUSY
:
2242 case -NFS4ERR_DELAY
:
2243 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2248 status
= nfs4_recovery_handle_error(clp
, status
);
2252 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2253 status
= nfs4_proc_create_session(clp
, cred
);
2255 dprintk("%s: session reset failed with status %d for server %s!\n",
2256 __func__
, status
, clp
->cl_hostname
);
2257 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2260 nfs41_finish_session_reset(clp
);
2261 dprintk("%s: session reset was successful for server %s!\n",
2262 __func__
, clp
->cl_hostname
);
2269 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2271 struct rpc_cred
*cred
;
2274 if (!nfs4_has_session(clp
))
2276 nfs4_begin_drain_session(clp
);
2277 cred
= nfs4_get_clid_cred(clp
);
2278 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2281 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2284 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2285 __func__
, clp
->cl_hostname
);
2287 case -NFS4ERR_DELAY
:
2289 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2292 return nfs4_recovery_handle_error(clp
, ret
);
2296 #else /* CONFIG_NFS_V4_1 */
2297 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2299 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2303 #endif /* CONFIG_NFS_V4_1 */
2305 static void nfs4_state_manager(struct nfs_client
*clp
)
2308 const char *section
= "", *section_sep
= "";
2310 /* Ensure exclusive access to NFSv4 state */
2312 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2313 section
= "purge state";
2314 status
= nfs4_purge_lease(clp
);
2320 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2321 section
= "lease expired";
2322 /* We're going to have to re-establish a clientid */
2323 status
= nfs4_reclaim_lease(clp
);
2329 /* Initialize or reset the session */
2330 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2331 section
= "reset session";
2332 status
= nfs4_reset_session(clp
);
2333 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2339 /* Send BIND_CONN_TO_SESSION */
2340 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2342 section
= "bind conn to session";
2343 status
= nfs4_bind_conn_to_session(clp
);
2349 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2350 section
= "check lease";
2351 status
= nfs4_check_lease(clp
);
2357 if (test_and_clear_bit(NFS4CLNT_MOVED
, &clp
->cl_state
)) {
2358 section
= "migration";
2359 status
= nfs4_handle_migration(clp
);
2364 if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED
, &clp
->cl_state
)) {
2365 section
= "lease moved";
2366 status
= nfs4_handle_lease_moved(clp
);
2371 /* First recover reboot state... */
2372 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2373 section
= "reclaim reboot";
2374 status
= nfs4_do_reclaim(clp
,
2375 clp
->cl_mvops
->reboot_recovery_ops
);
2376 if (status
== -EAGAIN
)
2380 nfs4_state_end_reclaim_reboot(clp
);
2383 /* Now recover expired state... */
2384 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2385 section
= "reclaim nograce";
2386 status
= nfs4_do_reclaim(clp
,
2387 clp
->cl_mvops
->nograce_recovery_ops
);
2388 if (status
== -EAGAIN
)
2394 nfs4_end_drain_session(clp
);
2395 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2396 nfs_client_return_marked_delegations(clp
);
2400 nfs4_clear_state_manager_bit(clp
);
2401 /* Did we race with an attempt to give us more work? */
2402 if (clp
->cl_state
== 0)
2404 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2406 } while (atomic_read(&clp
->cl_count
) > 1);
2409 if (strlen(section
))
2411 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2412 " with error %d\n", section_sep
, section
,
2413 clp
->cl_hostname
, -status
);
2415 nfs4_end_drain_session(clp
);
2416 nfs4_clear_state_manager_bit(clp
);
2419 static int nfs4_run_state_manager(void *ptr
)
2421 struct nfs_client
*clp
= ptr
;
2423 allow_signal(SIGKILL
);
2424 nfs4_state_manager(clp
);
2425 nfs_put_client(clp
);
2426 module_put_and_exit(0);