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 INIT_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
, pid_t fl_pid
, unsigned int type
)
792 struct nfs4_lock_state
*pos
;
793 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
794 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
796 switch (pos
->ls_owner
.lo_type
) {
797 case NFS4_POSIX_LOCK_TYPE
:
798 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
801 case NFS4_FLOCK_LOCK_TYPE
:
802 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
805 atomic_inc(&pos
->ls_count
);
812 * Return a compatible lock_state. If no initialized lock_state structure
813 * exists, return an uninitialized one.
816 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
)
818 struct nfs4_lock_state
*lsp
;
819 struct nfs_server
*server
= state
->owner
->so_server
;
821 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
824 nfs4_init_seqid_counter(&lsp
->ls_seqid
);
825 atomic_set(&lsp
->ls_count
, 1);
826 lsp
->ls_state
= state
;
827 lsp
->ls_owner
.lo_type
= type
;
828 switch (lsp
->ls_owner
.lo_type
) {
829 case NFS4_FLOCK_LOCK_TYPE
:
830 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
832 case NFS4_POSIX_LOCK_TYPE
:
833 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
838 lsp
->ls_seqid
.owner_id
= ida_simple_get(&server
->lockowner_id
, 0, 0, GFP_NOFS
);
839 if (lsp
->ls_seqid
.owner_id
< 0)
841 INIT_LIST_HEAD(&lsp
->ls_locks
);
848 void nfs4_free_lock_state(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
)
850 ida_simple_remove(&server
->lockowner_id
, lsp
->ls_seqid
.owner_id
);
851 nfs4_destroy_seqid_counter(&lsp
->ls_seqid
);
856 * Return a compatible lock_state. If no initialized lock_state structure
857 * exists, return an uninitialized one.
860 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
862 struct nfs4_lock_state
*lsp
, *new = NULL
;
865 spin_lock(&state
->state_lock
);
866 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
870 list_add(&new->ls_locks
, &state
->lock_states
);
871 set_bit(LK_STATE_IN_USE
, &state
->flags
);
876 spin_unlock(&state
->state_lock
);
877 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
881 spin_unlock(&state
->state_lock
);
883 nfs4_free_lock_state(state
->owner
->so_server
, new);
888 * Release reference to lock_state, and free it if we see that
889 * it is no longer in use
891 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
893 struct nfs_server
*server
;
894 struct nfs4_state
*state
;
898 state
= lsp
->ls_state
;
899 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
901 list_del(&lsp
->ls_locks
);
902 if (list_empty(&state
->lock_states
))
903 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
904 spin_unlock(&state
->state_lock
);
905 server
= state
->owner
->so_server
;
906 if (test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
)) {
907 struct nfs_client
*clp
= server
->nfs_client
;
909 clp
->cl_mvops
->free_lock_state(server
, lsp
);
911 nfs4_free_lock_state(server
, lsp
);
914 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
916 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
918 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
919 atomic_inc(&lsp
->ls_count
);
922 static void nfs4_fl_release_lock(struct file_lock
*fl
)
924 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
927 static const struct file_lock_operations nfs4_fl_lock_ops
= {
928 .fl_copy_lock
= nfs4_fl_copy_lock
,
929 .fl_release_private
= nfs4_fl_release_lock
,
932 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
934 struct nfs4_lock_state
*lsp
;
936 if (fl
->fl_ops
!= NULL
)
938 if (fl
->fl_flags
& FL_POSIX
)
939 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
940 else if (fl
->fl_flags
& FL_FLOCK
)
941 lsp
= nfs4_get_lock_state(state
, NULL
, fl
->fl_pid
,
942 NFS4_FLOCK_LOCK_TYPE
);
947 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
948 fl
->fl_ops
= &nfs4_fl_lock_ops
;
952 static int nfs4_copy_lock_stateid(nfs4_stateid
*dst
,
953 struct nfs4_state
*state
,
954 const struct nfs_lockowner
*lockowner
)
956 struct nfs4_lock_state
*lsp
;
962 if (lockowner
== NULL
)
965 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
968 fl_owner
= lockowner
->l_owner
;
969 fl_pid
= lockowner
->l_pid
;
970 spin_lock(&state
->state_lock
);
971 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
972 if (lsp
&& test_bit(NFS_LOCK_LOST
, &lsp
->ls_flags
))
974 else if (lsp
!= NULL
&& test_bit(NFS_LOCK_INITIALIZED
, &lsp
->ls_flags
) != 0) {
975 nfs4_stateid_copy(dst
, &lsp
->ls_stateid
);
978 if (!list_empty(&lsp
->ls_seqid
.list
))
981 spin_unlock(&state
->state_lock
);
982 nfs4_put_lock_state(lsp
);
987 static int nfs4_copy_open_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
)
989 const nfs4_stateid
*src
;
995 seq
= read_seqbegin(&state
->seqlock
);
996 if (test_bit(NFS_OPEN_STATE
, &state
->flags
))
997 src
= &state
->open_stateid
;
998 nfs4_stateid_copy(dst
, src
);
1001 if (!list_empty(&state
->owner
->so_seqid
.list
))
1003 } while (read_seqretry(&state
->seqlock
, seq
));
1008 * Byte-range lock aware utility to initialize the stateid of read/write
1011 int nfs4_select_rw_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
,
1012 fmode_t fmode
, const struct nfs_lockowner
*lockowner
)
1014 int ret
= nfs4_copy_lock_stateid(dst
, state
, lockowner
);
1016 /* A lost lock - don't even consider delegations */
1018 if (nfs4_copy_delegation_stateid(dst
, state
->inode
, fmode
))
1021 /* nfs4_copy_delegation_stateid() didn't over-write
1022 * dst, so it still has the lock stateid which we now
1026 ret
= nfs4_copy_open_stateid(dst
, state
);
1028 if (nfs_server_capable(state
->inode
, NFS_CAP_STATEID_NFSV41
))
1033 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
1035 struct nfs_seqid
*new;
1037 new = kmalloc(sizeof(*new), gfp_mask
);
1039 new->sequence
= counter
;
1040 INIT_LIST_HEAD(&new->list
);
1046 void nfs_release_seqid(struct nfs_seqid
*seqid
)
1048 struct nfs_seqid_counter
*sequence
;
1050 if (list_empty(&seqid
->list
))
1052 sequence
= seqid
->sequence
;
1053 spin_lock(&sequence
->lock
);
1054 list_del_init(&seqid
->list
);
1055 if (!list_empty(&sequence
->list
)) {
1056 struct nfs_seqid
*next
;
1058 next
= list_first_entry(&sequence
->list
,
1059 struct nfs_seqid
, list
);
1060 rpc_wake_up_queued_task(&sequence
->wait
, next
->task
);
1062 spin_unlock(&sequence
->lock
);
1065 void nfs_free_seqid(struct nfs_seqid
*seqid
)
1067 nfs_release_seqid(seqid
);
1072 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1073 * failed with a seqid incrementing error -
1074 * see comments nfs_fs.h:seqid_mutating_error()
1076 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
1081 case -NFS4ERR_BAD_SEQID
:
1082 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
1084 pr_warn_ratelimited("NFS: v4 server returned a bad"
1085 " sequence-id error on an"
1086 " unconfirmed sequence %p!\n",
1088 case -NFS4ERR_STALE_CLIENTID
:
1089 case -NFS4ERR_STALE_STATEID
:
1090 case -NFS4ERR_BAD_STATEID
:
1091 case -NFS4ERR_BADXDR
:
1092 case -NFS4ERR_RESOURCE
:
1093 case -NFS4ERR_NOFILEHANDLE
:
1094 /* Non-seqid mutating errors */
1098 * Note: no locking needed as we are guaranteed to be first
1099 * on the sequence list
1101 seqid
->sequence
->counter
++;
1104 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
1106 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
1107 struct nfs4_state_owner
, so_seqid
);
1108 struct nfs_server
*server
= sp
->so_server
;
1110 if (status
== -NFS4ERR_BAD_SEQID
)
1111 nfs4_drop_state_owner(sp
);
1112 if (!nfs4_has_session(server
->nfs_client
))
1113 nfs_increment_seqid(status
, seqid
);
1117 * Increment the seqid if the LOCK/LOCKU succeeded, or
1118 * failed with a seqid incrementing error -
1119 * see comments nfs_fs.h:seqid_mutating_error()
1121 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
1123 nfs_increment_seqid(status
, seqid
);
1126 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
1128 struct nfs_seqid_counter
*sequence
= seqid
->sequence
;
1131 spin_lock(&sequence
->lock
);
1133 if (list_empty(&seqid
->list
))
1134 list_add_tail(&seqid
->list
, &sequence
->list
);
1135 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
1137 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
1140 spin_unlock(&sequence
->lock
);
1144 static int nfs4_run_state_manager(void *);
1146 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
1148 smp_mb__before_clear_bit();
1149 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
1150 smp_mb__after_clear_bit();
1151 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
1152 rpc_wake_up(&clp
->cl_rpcwaitq
);
1156 * Schedule the nfs_client asynchronous state management routine
1158 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
1160 struct task_struct
*task
;
1161 char buf
[INET6_ADDRSTRLEN
+ sizeof("-manager") + 1];
1163 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1165 __module_get(THIS_MODULE
);
1166 atomic_inc(&clp
->cl_count
);
1168 /* The rcu_read_lock() is not strictly necessary, as the state
1169 * manager is the only thread that ever changes the rpc_xprt
1170 * after it's initialized. At this point, we're single threaded. */
1172 snprintf(buf
, sizeof(buf
), "%s-manager",
1173 rpc_peeraddr2str(clp
->cl_rpcclient
, RPC_DISPLAY_ADDR
));
1175 task
= kthread_run(nfs4_run_state_manager
, clp
, "%s", buf
);
1177 printk(KERN_ERR
"%s: kthread_run: %ld\n",
1178 __func__
, PTR_ERR(task
));
1179 nfs4_clear_state_manager_bit(clp
);
1180 nfs_put_client(clp
);
1181 module_put(THIS_MODULE
);
1186 * Schedule a lease recovery attempt
1188 void nfs4_schedule_lease_recovery(struct nfs_client
*clp
)
1192 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1193 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1194 dprintk("%s: scheduling lease recovery for server %s\n", __func__
,
1196 nfs4_schedule_state_manager(clp
);
1198 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery
);
1201 * nfs4_schedule_migration_recovery - trigger migration recovery
1203 * @server: FSID that is migrating
1205 * Returns zero if recovery has started, otherwise a negative NFS4ERR
1206 * value is returned.
1208 int nfs4_schedule_migration_recovery(const struct nfs_server
*server
)
1210 struct nfs_client
*clp
= server
->nfs_client
;
1212 if (server
->fh_expire_type
!= NFS4_FH_PERSISTENT
) {
1213 pr_err("NFS: volatile file handles not supported (server %s)\n",
1218 if (test_bit(NFS_MIG_FAILED
, &server
->mig_status
))
1221 dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n",
1223 (unsigned long long)server
->fsid
.major
,
1224 (unsigned long long)server
->fsid
.minor
,
1227 set_bit(NFS_MIG_IN_TRANSITION
,
1228 &((struct nfs_server
*)server
)->mig_status
);
1229 set_bit(NFS4CLNT_MOVED
, &clp
->cl_state
);
1231 nfs4_schedule_state_manager(clp
);
1234 EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery
);
1237 * nfs4_schedule_lease_moved_recovery - start lease-moved recovery
1239 * @clp: server to check for moved leases
1242 void nfs4_schedule_lease_moved_recovery(struct nfs_client
*clp
)
1244 dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n",
1245 __func__
, clp
->cl_clientid
, clp
->cl_hostname
);
1247 set_bit(NFS4CLNT_LEASE_MOVED
, &clp
->cl_state
);
1248 nfs4_schedule_state_manager(clp
);
1250 EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery
);
1252 int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
1258 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
1259 nfs_wait_bit_killable
, TASK_KILLABLE
);
1263 if (clp
->cl_cons_state
< 0)
1264 return clp
->cl_cons_state
;
1268 int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1273 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1274 ret
= nfs4_wait_clnt_recover(clp
);
1277 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1278 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1280 nfs4_schedule_state_manager(clp
);
1287 * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
1288 * @clp: client to process
1290 * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a
1291 * resend of the SETCLIENTID and hence re-establish the
1292 * callback channel. Then return all existing delegations.
1294 static void nfs40_handle_cb_pathdown(struct nfs_client
*clp
)
1296 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1297 nfs_expire_all_delegations(clp
);
1298 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__
,
1302 void nfs4_schedule_path_down_recovery(struct nfs_client
*clp
)
1304 nfs40_handle_cb_pathdown(clp
);
1305 nfs4_schedule_state_manager(clp
);
1308 static int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
1311 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1312 /* Don't recover state that expired before the reboot */
1313 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
1314 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1317 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
1318 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1322 static int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
1324 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
1325 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
1326 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
1327 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
1331 int nfs4_schedule_stateid_recovery(const struct nfs_server
*server
, struct nfs4_state
*state
)
1333 struct nfs_client
*clp
= server
->nfs_client
;
1335 if (!nfs4_valid_open_stateid(state
))
1337 nfs4_state_mark_reclaim_nograce(clp
, state
);
1338 dprintk("%s: scheduling stateid recovery for server %s\n", __func__
,
1340 nfs4_schedule_state_manager(clp
);
1343 EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery
);
1345 void nfs_inode_find_state_and_recover(struct inode
*inode
,
1346 const nfs4_stateid
*stateid
)
1348 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1349 struct nfs_inode
*nfsi
= NFS_I(inode
);
1350 struct nfs_open_context
*ctx
;
1351 struct nfs4_state
*state
;
1354 spin_lock(&inode
->i_lock
);
1355 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1359 if (!test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
1361 if (!nfs4_stateid_match(&state
->stateid
, stateid
))
1363 nfs4_state_mark_reclaim_nograce(clp
, state
);
1366 spin_unlock(&inode
->i_lock
);
1368 nfs4_schedule_state_manager(clp
);
1371 static void nfs4_state_mark_open_context_bad(struct nfs4_state
*state
)
1373 struct inode
*inode
= state
->inode
;
1374 struct nfs_inode
*nfsi
= NFS_I(inode
);
1375 struct nfs_open_context
*ctx
;
1377 spin_lock(&inode
->i_lock
);
1378 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1379 if (ctx
->state
!= state
)
1381 set_bit(NFS_CONTEXT_BAD
, &ctx
->flags
);
1383 spin_unlock(&inode
->i_lock
);
1386 static void nfs4_state_mark_recovery_failed(struct nfs4_state
*state
, int error
)
1388 set_bit(NFS_STATE_RECOVERY_FAILED
, &state
->flags
);
1389 nfs4_state_mark_open_context_bad(state
);
1393 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
1395 struct inode
*inode
= state
->inode
;
1396 struct nfs_inode
*nfsi
= NFS_I(inode
);
1397 struct file_lock
*fl
;
1400 if (inode
->i_flock
== NULL
)
1403 /* Guard against delegation returns and new lock/unlock calls */
1404 down_write(&nfsi
->rwsem
);
1405 /* Protect inode->i_flock using the BKL */
1406 spin_lock(&inode
->i_lock
);
1407 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
1408 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
1410 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
1412 spin_unlock(&inode
->i_lock
);
1413 status
= ops
->recover_lock(state
, fl
);
1418 case -NFS4ERR_ADMIN_REVOKED
:
1419 case -NFS4ERR_STALE_STATEID
:
1420 case -NFS4ERR_BAD_STATEID
:
1421 case -NFS4ERR_EXPIRED
:
1422 case -NFS4ERR_NO_GRACE
:
1423 case -NFS4ERR_STALE_CLIENTID
:
1424 case -NFS4ERR_BADSESSION
:
1425 case -NFS4ERR_BADSLOT
:
1426 case -NFS4ERR_BAD_HIGH_SLOT
:
1427 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1430 printk(KERN_ERR
"NFS: %s: unhandled error %d\n",
1433 case -NFS4ERR_DENIED
:
1434 case -NFS4ERR_RECLAIM_BAD
:
1435 case -NFS4ERR_RECLAIM_CONFLICT
:
1436 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1439 spin_lock(&inode
->i_lock
);
1441 spin_unlock(&inode
->i_lock
);
1443 up_write(&nfsi
->rwsem
);
1447 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1449 struct nfs4_state
*state
;
1450 struct nfs4_lock_state
*lock
;
1453 /* Note: we rely on the sp->so_states list being ordered
1454 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1456 * This is needed to ensure that the server won't give us any
1457 * read delegations that we have to return if, say, we are
1458 * recovering after a network partition or a reboot from a
1459 * server that doesn't support a grace period.
1461 spin_lock(&sp
->so_lock
);
1462 write_seqcount_begin(&sp
->so_reclaim_seqcount
);
1464 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1465 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1467 if (!nfs4_valid_open_stateid(state
))
1469 if (state
->state
== 0)
1471 atomic_inc(&state
->count
);
1472 spin_unlock(&sp
->so_lock
);
1473 status
= ops
->recover_open(sp
, state
);
1475 status
= nfs4_reclaim_locks(state
, ops
);
1477 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0) {
1478 spin_lock(&state
->state_lock
);
1479 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1480 if (!test_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
))
1481 pr_warn_ratelimited("NFS: "
1483 "failed!\n", __func__
);
1485 spin_unlock(&state
->state_lock
);
1487 nfs4_put_open_state(state
);
1488 spin_lock(&sp
->so_lock
);
1494 printk(KERN_ERR
"NFS: %s: unhandled error %d\n",
1499 /* Open state on this file cannot be recovered */
1500 nfs4_state_mark_recovery_failed(state
, status
);
1504 case -NFS4ERR_ADMIN_REVOKED
:
1505 case -NFS4ERR_STALE_STATEID
:
1506 case -NFS4ERR_BAD_STATEID
:
1507 case -NFS4ERR_RECLAIM_BAD
:
1508 case -NFS4ERR_RECLAIM_CONFLICT
:
1509 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1511 case -NFS4ERR_EXPIRED
:
1512 case -NFS4ERR_NO_GRACE
:
1513 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1514 case -NFS4ERR_STALE_CLIENTID
:
1515 case -NFS4ERR_BADSESSION
:
1516 case -NFS4ERR_BADSLOT
:
1517 case -NFS4ERR_BAD_HIGH_SLOT
:
1518 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1521 nfs4_put_open_state(state
);
1522 spin_lock(&sp
->so_lock
);
1525 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1526 spin_unlock(&sp
->so_lock
);
1529 nfs4_put_open_state(state
);
1530 spin_lock(&sp
->so_lock
);
1531 write_seqcount_end(&sp
->so_reclaim_seqcount
);
1532 spin_unlock(&sp
->so_lock
);
1536 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1538 struct nfs4_lock_state
*lock
;
1540 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1541 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1542 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1543 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1544 spin_lock(&state
->state_lock
);
1545 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1546 lock
->ls_seqid
.flags
= 0;
1547 clear_bit(NFS_LOCK_INITIALIZED
, &lock
->ls_flags
);
1549 spin_unlock(&state
->state_lock
);
1552 static void nfs4_reset_seqids(struct nfs_server
*server
,
1553 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1555 struct nfs_client
*clp
= server
->nfs_client
;
1556 struct nfs4_state_owner
*sp
;
1557 struct rb_node
*pos
;
1558 struct nfs4_state
*state
;
1560 spin_lock(&clp
->cl_lock
);
1561 for (pos
= rb_first(&server
->state_owners
);
1563 pos
= rb_next(pos
)) {
1564 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1565 sp
->so_seqid
.flags
= 0;
1566 spin_lock(&sp
->so_lock
);
1567 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1568 if (mark_reclaim(clp
, state
))
1569 nfs4_clear_open_state(state
);
1571 spin_unlock(&sp
->so_lock
);
1573 spin_unlock(&clp
->cl_lock
);
1576 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
,
1577 int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1579 struct nfs_server
*server
;
1582 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1583 nfs4_reset_seqids(server
, mark_reclaim
);
1587 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1589 /* Mark all delegations for reclaim */
1590 nfs_delegation_mark_reclaim(clp
);
1591 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1594 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1595 const struct nfs4_state_recovery_ops
*ops
,
1596 struct rpc_cred
*cred
)
1598 /* Notify the server we're done reclaiming our state */
1599 if (ops
->reclaim_complete
)
1600 (void)ops
->reclaim_complete(clp
, cred
);
1603 static void nfs4_clear_reclaim_server(struct nfs_server
*server
)
1605 struct nfs_client
*clp
= server
->nfs_client
;
1606 struct nfs4_state_owner
*sp
;
1607 struct rb_node
*pos
;
1608 struct nfs4_state
*state
;
1610 spin_lock(&clp
->cl_lock
);
1611 for (pos
= rb_first(&server
->state_owners
);
1613 pos
= rb_next(pos
)) {
1614 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_server_node
);
1615 spin_lock(&sp
->so_lock
);
1616 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1617 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
,
1620 nfs4_state_mark_reclaim_nograce(clp
, state
);
1622 spin_unlock(&sp
->so_lock
);
1624 spin_unlock(&clp
->cl_lock
);
1627 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1629 struct nfs_server
*server
;
1631 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1635 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
)
1636 nfs4_clear_reclaim_server(server
);
1639 nfs_delegation_reap_unclaimed(clp
);
1643 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1645 const struct nfs4_state_recovery_ops
*ops
;
1646 struct rpc_cred
*cred
;
1648 if (!nfs4_state_clear_reclaim_reboot(clp
))
1650 ops
= clp
->cl_mvops
->reboot_recovery_ops
;
1651 cred
= nfs4_get_clid_cred(clp
);
1652 nfs4_reclaim_complete(clp
, ops
, cred
);
1656 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1658 nfs_delegation_mark_reclaim(clp
);
1659 nfs_delegation_reap_unclaimed(clp
);
1662 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1664 nfs_delegation_clear_all(clp
);
1665 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1668 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1673 case -NFS4ERR_CB_PATH_DOWN
:
1674 nfs40_handle_cb_pathdown(clp
);
1676 case -NFS4ERR_NO_GRACE
:
1677 nfs4_state_end_reclaim_reboot(clp
);
1679 case -NFS4ERR_STALE_CLIENTID
:
1680 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1681 nfs4_state_clear_reclaim_reboot(clp
);
1682 nfs4_state_start_reclaim_reboot(clp
);
1684 case -NFS4ERR_EXPIRED
:
1685 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1686 nfs4_state_start_reclaim_nograce(clp
);
1688 case -NFS4ERR_BADSESSION
:
1689 case -NFS4ERR_BADSLOT
:
1690 case -NFS4ERR_BAD_HIGH_SLOT
:
1691 case -NFS4ERR_DEADSESSION
:
1692 case -NFS4ERR_SEQ_FALSE_RETRY
:
1693 case -NFS4ERR_SEQ_MISORDERED
:
1694 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1695 /* Zero session reset errors */
1697 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1698 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
1701 dprintk("%s: failed to handle error %d for server %s\n",
1702 __func__
, error
, clp
->cl_hostname
);
1705 dprintk("%s: handled error %d for server %s\n", __func__
, error
,
1710 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1712 struct nfs4_state_owner
*sp
;
1713 struct nfs_server
*server
;
1714 struct rb_node
*pos
;
1719 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1720 nfs4_purge_state_owners(server
);
1721 spin_lock(&clp
->cl_lock
);
1722 for (pos
= rb_first(&server
->state_owners
);
1724 pos
= rb_next(pos
)) {
1726 struct nfs4_state_owner
, so_server_node
);
1727 if (!test_and_clear_bit(ops
->owner_flag_bit
,
1730 atomic_inc(&sp
->so_count
);
1731 spin_unlock(&clp
->cl_lock
);
1734 status
= nfs4_reclaim_open_state(sp
, ops
);
1736 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1737 nfs4_put_state_owner(sp
);
1738 return nfs4_recovery_handle_error(clp
, status
);
1741 nfs4_put_state_owner(sp
);
1744 spin_unlock(&clp
->cl_lock
);
1750 static int nfs4_check_lease(struct nfs_client
*clp
)
1752 struct rpc_cred
*cred
;
1753 const struct nfs4_state_maintenance_ops
*ops
=
1754 clp
->cl_mvops
->state_renewal_ops
;
1757 /* Is the client already known to have an expired lease? */
1758 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1760 spin_lock(&clp
->cl_lock
);
1761 cred
= ops
->get_state_renewal_cred_locked(clp
);
1762 spin_unlock(&clp
->cl_lock
);
1764 cred
= nfs4_get_clid_cred(clp
);
1769 status
= ops
->renew_lease(clp
, cred
);
1771 if (status
== -ETIMEDOUT
) {
1772 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1776 return nfs4_recovery_handle_error(clp
, status
);
1779 /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors
1780 * and for recoverable errors on EXCHANGE_ID for v4.1
1782 static int nfs4_handle_reclaim_lease_error(struct nfs_client
*clp
, int status
)
1785 case -NFS4ERR_SEQ_MISORDERED
:
1786 if (test_and_set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
))
1787 return -ESERVERFAULT
;
1788 /* Lease confirmation error: retry after purging the lease */
1790 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1792 case -NFS4ERR_STALE_CLIENTID
:
1793 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1794 nfs4_state_clear_reclaim_reboot(clp
);
1795 nfs4_state_start_reclaim_reboot(clp
);
1797 case -NFS4ERR_CLID_INUSE
:
1798 pr_err("NFS: Server %s reports our clientid is in use\n",
1800 nfs_mark_client_ready(clp
, -EPERM
);
1801 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
1804 case -NFS4ERR_DELAY
:
1810 case -NFS4ERR_MINOR_VERS_MISMATCH
:
1811 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
)
1812 nfs_mark_client_ready(clp
, -EPROTONOSUPPORT
);
1813 dprintk("%s: exit with error %d for server %s\n",
1814 __func__
, -EPROTONOSUPPORT
, clp
->cl_hostname
);
1815 return -EPROTONOSUPPORT
;
1816 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1817 * in nfs4_exchange_id */
1819 dprintk("%s: exit with error %d for server %s\n", __func__
,
1820 status
, clp
->cl_hostname
);
1823 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1824 dprintk("%s: handled error %d for server %s\n", __func__
, status
,
1829 static int nfs4_establish_lease(struct nfs_client
*clp
)
1831 struct rpc_cred
*cred
;
1832 const struct nfs4_state_recovery_ops
*ops
=
1833 clp
->cl_mvops
->reboot_recovery_ops
;
1836 cred
= nfs4_get_clid_cred(clp
);
1839 status
= ops
->establish_clid(clp
, cred
);
1843 pnfs_destroy_all_layouts(clp
);
1848 * Returns zero or a negative errno. NFS4ERR values are converted
1849 * to local errno values.
1851 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1855 status
= nfs4_establish_lease(clp
);
1857 return nfs4_handle_reclaim_lease_error(clp
, status
);
1858 if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
))
1859 nfs4_state_start_reclaim_nograce(clp
);
1860 if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1861 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1862 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1863 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1867 static int nfs4_purge_lease(struct nfs_client
*clp
)
1871 status
= nfs4_establish_lease(clp
);
1873 return nfs4_handle_reclaim_lease_error(clp
, status
);
1874 clear_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
1875 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1876 nfs4_state_start_reclaim_nograce(clp
);
1881 * Try remote migration of one FSID from a source server to a
1882 * destination server. The source server provides a list of
1883 * potential destinations.
1885 * Returns zero or a negative NFS4ERR status code.
1887 static int nfs4_try_migration(struct nfs_server
*server
, struct rpc_cred
*cred
)
1889 struct nfs_client
*clp
= server
->nfs_client
;
1890 struct nfs4_fs_locations
*locations
= NULL
;
1891 struct inode
*inode
;
1895 dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__
,
1896 (unsigned long long)server
->fsid
.major
,
1897 (unsigned long long)server
->fsid
.minor
,
1901 page
= alloc_page(GFP_KERNEL
);
1902 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1903 if (page
== NULL
|| locations
== NULL
) {
1904 dprintk("<-- %s: no memory\n", __func__
);
1908 inode
= server
->super
->s_root
->d_inode
;
1909 result
= nfs4_proc_get_locations(inode
, locations
, page
, cred
);
1911 dprintk("<-- %s: failed to retrieve fs_locations: %d\n",
1916 result
= -NFS4ERR_NXIO
;
1917 if (!(locations
->fattr
.valid
& NFS_ATTR_FATTR_V4_LOCATIONS
)) {
1918 dprintk("<-- %s: No fs_locations data, migration skipped\n",
1923 nfs4_begin_drain_session(clp
);
1925 status
= nfs4_replace_transport(server
, locations
);
1927 dprintk("<-- %s: failed to replace transport: %d\n",
1933 dprintk("<-- %s: migration succeeded\n", __func__
);
1940 pr_err("NFS: migration recovery failed (server %s)\n",
1942 set_bit(NFS_MIG_FAILED
, &server
->mig_status
);
1948 * Returns zero or a negative NFS4ERR status code.
1950 static int nfs4_handle_migration(struct nfs_client
*clp
)
1952 const struct nfs4_state_maintenance_ops
*ops
=
1953 clp
->cl_mvops
->state_renewal_ops
;
1954 struct nfs_server
*server
;
1955 struct rpc_cred
*cred
;
1957 dprintk("%s: migration reported on \"%s\"\n", __func__
,
1960 spin_lock(&clp
->cl_lock
);
1961 cred
= ops
->get_state_renewal_cred_locked(clp
);
1962 spin_unlock(&clp
->cl_lock
);
1964 return -NFS4ERR_NOENT
;
1969 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
1972 if (server
->mig_gen
== clp
->cl_mig_gen
)
1974 server
->mig_gen
= clp
->cl_mig_gen
;
1976 if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION
,
1977 &server
->mig_status
))
1981 status
= nfs4_try_migration(server
, cred
);
1994 * Test each nfs_server on the clp's cl_superblocks list to see
1995 * if it's moved to another server. Stop when the server no longer
1996 * returns NFS4ERR_LEASE_MOVED.
1998 static int nfs4_handle_lease_moved(struct nfs_client
*clp
)
2000 const struct nfs4_state_maintenance_ops
*ops
=
2001 clp
->cl_mvops
->state_renewal_ops
;
2002 struct nfs_server
*server
;
2003 struct rpc_cred
*cred
;
2005 dprintk("%s: lease moved reported on \"%s\"\n", __func__
,
2008 spin_lock(&clp
->cl_lock
);
2009 cred
= ops
->get_state_renewal_cred_locked(clp
);
2010 spin_unlock(&clp
->cl_lock
);
2012 return -NFS4ERR_NOENT
;
2017 list_for_each_entry_rcu(server
, &clp
->cl_superblocks
, client_link
) {
2018 struct inode
*inode
;
2021 if (server
->mig_gen
== clp
->cl_mig_gen
)
2023 server
->mig_gen
= clp
->cl_mig_gen
;
2027 inode
= server
->super
->s_root
->d_inode
;
2028 status
= nfs4_proc_fsid_present(inode
, cred
);
2029 if (status
!= -NFS4ERR_MOVED
)
2030 goto restart
; /* wasn't this one */
2031 if (nfs4_try_migration(server
, cred
) == -NFS4ERR_LEASE_MOVED
)
2032 goto restart
; /* there are more */
2043 * nfs4_discover_server_trunking - Detect server IP address trunking
2045 * @clp: nfs_client under test
2046 * @result: OUT: found nfs_client, or clp
2048 * Returns zero or a negative errno. If zero is returned,
2049 * an nfs_client pointer is planted in "result".
2051 * Note: since we are invoked in process context, and
2052 * not from inside the state manager, we cannot use
2053 * nfs4_handle_reclaim_lease_error().
2055 int nfs4_discover_server_trunking(struct nfs_client
*clp
,
2056 struct nfs_client
**result
)
2058 const struct nfs4_state_recovery_ops
*ops
=
2059 clp
->cl_mvops
->reboot_recovery_ops
;
2060 struct rpc_clnt
*clnt
;
2061 struct rpc_cred
*cred
;
2064 dprintk("NFS: %s: testing '%s'\n", __func__
, clp
->cl_hostname
);
2066 clnt
= clp
->cl_rpcclient
;
2069 mutex_lock(&nfs_clid_init_mutex
);
2072 cred
= nfs4_get_clid_cred(clp
);
2076 status
= ops
->detect_trunking(clp
, result
, cred
);
2081 case -NFS4ERR_DELAY
:
2085 case -NFS4ERR_STALE_CLIENTID
:
2086 dprintk("NFS: %s after status %d, retrying\n",
2091 nfs4_root_machine_cred(clp
);
2096 case -NFS4ERR_CLID_INUSE
:
2097 case -NFS4ERR_WRONGSEC
:
2098 clnt
= rpc_clone_client_set_auth(clnt
, RPC_AUTH_UNIX
);
2100 status
= PTR_ERR(clnt
);
2103 /* Note: this is safe because we haven't yet marked the
2104 * client as ready, so we are the only user of
2107 clnt
= xchg(&clp
->cl_rpcclient
, clnt
);
2108 rpc_shutdown_client(clnt
);
2109 clnt
= clp
->cl_rpcclient
;
2112 case -NFS4ERR_MINOR_VERS_MISMATCH
:
2113 status
= -EPROTONOSUPPORT
;
2117 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
2118 * in nfs4_exchange_id */
2119 status
= -EKEYEXPIRED
;
2122 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
2128 mutex_unlock(&nfs_clid_init_mutex
);
2129 dprintk("NFS: %s: status = %d\n", __func__
, status
);
2133 #ifdef CONFIG_NFS_V4_1
2134 void nfs4_schedule_session_recovery(struct nfs4_session
*session
, int err
)
2136 struct nfs_client
*clp
= session
->clp
;
2140 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2142 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
2143 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2145 nfs4_schedule_lease_recovery(clp
);
2147 EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery
);
2149 static void nfs41_ping_server(struct nfs_client
*clp
)
2151 /* Use CHECK_LEASE to ping the server with a SEQUENCE */
2152 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
2153 nfs4_schedule_state_manager(clp
);
2156 void nfs41_server_notify_target_slotid_update(struct nfs_client
*clp
)
2158 nfs41_ping_server(clp
);
2161 void nfs41_server_notify_highest_slotid_update(struct nfs_client
*clp
)
2163 nfs41_ping_server(clp
);
2166 static void nfs4_reset_all_state(struct nfs_client
*clp
)
2168 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
2169 set_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
);
2170 clear_bit(NFS4CLNT_LEASE_CONFIRM
, &clp
->cl_state
);
2171 nfs4_state_start_reclaim_nograce(clp
);
2172 dprintk("%s: scheduling reset of all state for server %s!\n",
2173 __func__
, clp
->cl_hostname
);
2174 nfs4_schedule_state_manager(clp
);
2178 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
2180 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
2181 nfs4_state_start_reclaim_reboot(clp
);
2182 dprintk("%s: server %s rebooted!\n", __func__
,
2184 nfs4_schedule_state_manager(clp
);
2188 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
2190 nfs4_reset_all_state(clp
);
2191 dprintk("%s: state revoked on server %s\n", __func__
, clp
->cl_hostname
);
2194 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
2196 /* This will need to handle layouts too */
2197 nfs_expire_all_delegations(clp
);
2198 dprintk("%s: Recallable state revoked on server %s!\n", __func__
,
2202 static void nfs41_handle_backchannel_fault(struct nfs_client
*clp
)
2204 nfs_expire_all_delegations(clp
);
2205 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
2206 nfs4_schedule_state_manager(clp
);
2207 dprintk("%s: server %s declared a backchannel fault\n", __func__
,
2211 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
2213 if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2214 &clp
->cl_state
) == 0)
2215 nfs4_schedule_state_manager(clp
);
2218 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
2223 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2224 __func__
, clp
->cl_hostname
, clp
->cl_clientid
, flags
);
2226 if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
2227 nfs41_handle_server_reboot(clp
);
2228 if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
2229 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
2230 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
2231 SEQ4_STATUS_LEASE_MOVED
))
2232 nfs41_handle_state_revoked(clp
);
2233 if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
2234 nfs41_handle_recallable_state_revoked(clp
);
2235 if (flags
& SEQ4_STATUS_BACKCHANNEL_FAULT
)
2236 nfs41_handle_backchannel_fault(clp
);
2237 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
2238 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
2239 nfs41_handle_cb_path_down(clp
);
2242 static int nfs4_reset_session(struct nfs_client
*clp
)
2244 struct rpc_cred
*cred
;
2247 if (!nfs4_has_session(clp
))
2249 nfs4_begin_drain_session(clp
);
2250 cred
= nfs4_get_clid_cred(clp
);
2251 status
= nfs4_proc_destroy_session(clp
->cl_session
, cred
);
2254 case -NFS4ERR_BADSESSION
:
2255 case -NFS4ERR_DEADSESSION
:
2257 case -NFS4ERR_BACK_CHAN_BUSY
:
2258 case -NFS4ERR_DELAY
:
2259 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
2264 status
= nfs4_recovery_handle_error(clp
, status
);
2268 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
2269 status
= nfs4_proc_create_session(clp
, cred
);
2271 dprintk("%s: session reset failed with status %d for server %s!\n",
2272 __func__
, status
, clp
->cl_hostname
);
2273 status
= nfs4_handle_reclaim_lease_error(clp
, status
);
2276 nfs41_finish_session_reset(clp
);
2277 dprintk("%s: session reset was successful for server %s!\n",
2278 __func__
, clp
->cl_hostname
);
2285 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2287 struct rpc_cred
*cred
;
2290 if (!nfs4_has_session(clp
))
2292 nfs4_begin_drain_session(clp
);
2293 cred
= nfs4_get_clid_cred(clp
);
2294 ret
= nfs4_proc_bind_conn_to_session(clp
, cred
);
2297 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2300 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2301 __func__
, clp
->cl_hostname
);
2303 case -NFS4ERR_DELAY
:
2305 set_bit(NFS4CLNT_BIND_CONN_TO_SESSION
, &clp
->cl_state
);
2308 return nfs4_recovery_handle_error(clp
, ret
);
2312 #else /* CONFIG_NFS_V4_1 */
2313 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
2315 static int nfs4_bind_conn_to_session(struct nfs_client
*clp
)
2319 #endif /* CONFIG_NFS_V4_1 */
2321 static void nfs4_state_manager(struct nfs_client
*clp
)
2324 const char *section
= "", *section_sep
= "";
2326 /* Ensure exclusive access to NFSv4 state */
2328 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
2329 section
= "purge state";
2330 status
= nfs4_purge_lease(clp
);
2336 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
2337 section
= "lease expired";
2338 /* We're going to have to re-establish a clientid */
2339 status
= nfs4_reclaim_lease(clp
);
2345 /* Initialize or reset the session */
2346 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)) {
2347 section
= "reset session";
2348 status
= nfs4_reset_session(clp
);
2349 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
2355 /* Send BIND_CONN_TO_SESSION */
2356 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION
,
2358 section
= "bind conn to session";
2359 status
= nfs4_bind_conn_to_session(clp
);
2365 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
2366 section
= "check lease";
2367 status
= nfs4_check_lease(clp
);
2372 if (test_and_clear_bit(NFS4CLNT_MOVED
, &clp
->cl_state
)) {
2373 section
= "migration";
2374 status
= nfs4_handle_migration(clp
);
2379 if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED
, &clp
->cl_state
)) {
2380 section
= "lease moved";
2381 status
= nfs4_handle_lease_moved(clp
);
2386 /* First recover reboot state... */
2387 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
2388 section
= "reclaim reboot";
2389 status
= nfs4_do_reclaim(clp
,
2390 clp
->cl_mvops
->reboot_recovery_ops
);
2391 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2392 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
2394 nfs4_state_end_reclaim_reboot(clp
);
2395 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
2401 /* Now recover expired state... */
2402 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
2403 section
= "reclaim nograce";
2404 status
= nfs4_do_reclaim(clp
,
2405 clp
->cl_mvops
->nograce_recovery_ops
);
2406 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
2407 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
2408 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
2414 nfs4_end_drain_session(clp
);
2415 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
2416 nfs_client_return_marked_delegations(clp
);
2420 nfs4_clear_state_manager_bit(clp
);
2421 /* Did we race with an attempt to give us more work? */
2422 if (clp
->cl_state
== 0)
2424 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
2426 } while (atomic_read(&clp
->cl_count
) > 1);
2429 if (strlen(section
))
2431 pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
2432 " with error %d\n", section_sep
, section
,
2433 clp
->cl_hostname
, -status
);
2435 nfs4_end_drain_session(clp
);
2436 nfs4_clear_state_manager_bit(clp
);
2439 static int nfs4_run_state_manager(void *ptr
)
2441 struct nfs_client
*clp
= ptr
;
2443 allow_signal(SIGKILL
);
2444 nfs4_state_manager(clp
);
2445 nfs_put_client(clp
);
2446 module_put_and_exit(0);