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>
43 #include <linux/smp_lock.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>
55 #include "delegation.h"
58 #define OPENOWNER_POOL_SIZE 8
60 const nfs4_stateid zero_stateid
;
62 static LIST_HEAD(nfs4_clientid_list
);
64 int nfs4_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
66 struct nfs4_setclientid_res clid
;
70 port
= nfs_callback_tcpport
;
71 if (clp
->cl_addr
.ss_family
== AF_INET6
)
72 port
= nfs_callback_tcpport6
;
74 status
= nfs4_proc_setclientid(clp
, NFS4_CALLBACK
, port
, cred
, &clid
);
77 status
= nfs4_proc_setclientid_confirm(clp
, &clid
, cred
);
80 clp
->cl_clientid
= clid
.clientid
;
81 nfs4_schedule_state_renewal(clp
);
86 struct rpc_cred
*nfs4_get_machine_cred_locked(struct nfs_client
*clp
)
88 struct rpc_cred
*cred
= NULL
;
90 if (clp
->cl_machine_cred
!= NULL
)
91 cred
= get_rpccred(clp
->cl_machine_cred
);
95 static void nfs4_clear_machine_cred(struct nfs_client
*clp
)
97 struct rpc_cred
*cred
;
99 spin_lock(&clp
->cl_lock
);
100 cred
= clp
->cl_machine_cred
;
101 clp
->cl_machine_cred
= NULL
;
102 spin_unlock(&clp
->cl_lock
);
107 struct rpc_cred
*nfs4_get_renew_cred_locked(struct nfs_client
*clp
)
109 struct nfs4_state_owner
*sp
;
111 struct rpc_cred
*cred
= NULL
;
113 for (pos
= rb_first(&clp
->cl_state_owners
); pos
!= NULL
; pos
= rb_next(pos
)) {
114 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_client_node
);
115 if (list_empty(&sp
->so_states
))
117 cred
= get_rpccred(sp
->so_cred
);
123 #if defined(CONFIG_NFS_V4_1)
125 static int nfs41_setup_state_renewal(struct nfs_client
*clp
)
128 struct nfs_fsinfo fsinfo
;
130 status
= nfs4_proc_get_lease_time(clp
, &fsinfo
);
132 /* Update lease time and schedule renewal */
133 spin_lock(&clp
->cl_lock
);
134 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
135 clp
->cl_last_renewal
= jiffies
;
136 spin_unlock(&clp
->cl_lock
);
138 nfs4_schedule_state_renewal(clp
);
144 static void nfs4_end_drain_session(struct nfs_client
*clp
)
146 struct nfs4_session
*ses
= clp
->cl_session
;
151 if (test_and_clear_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
152 spin_lock(&ses
->fc_slot_table
.slot_tbl_lock
);
153 max_slots
= ses
->fc_slot_table
.max_slots
;
154 while (max_slots
--) {
155 struct rpc_task
*task
;
157 task
= rpc_wake_up_next(&ses
->fc_slot_table
.
161 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
163 spin_unlock(&ses
->fc_slot_table
.slot_tbl_lock
);
167 static int nfs4_begin_drain_session(struct nfs_client
*clp
)
169 struct nfs4_session
*ses
= clp
->cl_session
;
170 struct nfs4_slot_table
*tbl
= &ses
->fc_slot_table
;
172 spin_lock(&tbl
->slot_tbl_lock
);
173 set_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
);
174 if (tbl
->highest_used_slotid
!= -1) {
175 INIT_COMPLETION(ses
->complete
);
176 spin_unlock(&tbl
->slot_tbl_lock
);
177 return wait_for_completion_interruptible(&ses
->complete
);
179 spin_unlock(&tbl
->slot_tbl_lock
);
183 int nfs41_init_clientid(struct nfs_client
*clp
, struct rpc_cred
*cred
)
187 nfs4_begin_drain_session(clp
);
188 status
= nfs4_proc_exchange_id(clp
, cred
);
191 status
= nfs4_proc_create_session(clp
);
194 nfs41_setup_state_renewal(clp
);
195 nfs_mark_client_ready(clp
, NFS_CS_READY
);
200 struct rpc_cred
*nfs4_get_exchange_id_cred(struct nfs_client
*clp
)
202 struct rpc_cred
*cred
;
204 spin_lock(&clp
->cl_lock
);
205 cred
= nfs4_get_machine_cred_locked(clp
);
206 spin_unlock(&clp
->cl_lock
);
210 #endif /* CONFIG_NFS_V4_1 */
212 struct rpc_cred
*nfs4_get_setclientid_cred(struct nfs_client
*clp
)
214 struct nfs4_state_owner
*sp
;
216 struct rpc_cred
*cred
;
218 spin_lock(&clp
->cl_lock
);
219 cred
= nfs4_get_machine_cred_locked(clp
);
222 pos
= rb_first(&clp
->cl_state_owners
);
224 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_client_node
);
225 cred
= get_rpccred(sp
->so_cred
);
228 spin_unlock(&clp
->cl_lock
);
232 static void nfs_alloc_unique_id(struct rb_root
*root
, struct nfs_unique_id
*new,
233 __u64 minval
, int maxbits
)
235 struct rb_node
**p
, *parent
;
236 struct nfs_unique_id
*pos
;
240 mask
= (1ULL << maxbits
) - 1ULL;
242 /* Ensure distribution is more or less flat */
243 get_random_bytes(&new->id
, sizeof(new->id
));
245 if (new->id
< minval
)
253 pos
= rb_entry(parent
, struct nfs_unique_id
, rb_node
);
255 if (new->id
< pos
->id
)
257 else if (new->id
> pos
->id
)
262 rb_link_node(&new->rb_node
, parent
, p
);
263 rb_insert_color(&new->rb_node
, root
);
268 if (new->id
< minval
|| (new->id
& mask
) != new->id
) {
272 parent
= rb_next(parent
);
275 pos
= rb_entry(parent
, struct nfs_unique_id
, rb_node
);
276 if (new->id
< pos
->id
)
282 static void nfs_free_unique_id(struct rb_root
*root
, struct nfs_unique_id
*id
)
284 rb_erase(&id
->rb_node
, root
);
287 static struct nfs4_state_owner
*
288 nfs4_find_state_owner(struct nfs_server
*server
, struct rpc_cred
*cred
)
290 struct nfs_client
*clp
= server
->nfs_client
;
291 struct rb_node
**p
= &clp
->cl_state_owners
.rb_node
,
293 struct nfs4_state_owner
*sp
, *res
= NULL
;
297 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_client_node
);
299 if (server
< sp
->so_server
) {
300 p
= &parent
->rb_left
;
303 if (server
> sp
->so_server
) {
304 p
= &parent
->rb_right
;
307 if (cred
< sp
->so_cred
)
308 p
= &parent
->rb_left
;
309 else if (cred
> sp
->so_cred
)
310 p
= &parent
->rb_right
;
312 atomic_inc(&sp
->so_count
);
320 static struct nfs4_state_owner
*
321 nfs4_insert_state_owner(struct nfs_client
*clp
, struct nfs4_state_owner
*new)
323 struct rb_node
**p
= &clp
->cl_state_owners
.rb_node
,
325 struct nfs4_state_owner
*sp
;
329 sp
= rb_entry(parent
, struct nfs4_state_owner
, so_client_node
);
331 if (new->so_server
< sp
->so_server
) {
332 p
= &parent
->rb_left
;
335 if (new->so_server
> sp
->so_server
) {
336 p
= &parent
->rb_right
;
339 if (new->so_cred
< sp
->so_cred
)
340 p
= &parent
->rb_left
;
341 else if (new->so_cred
> sp
->so_cred
)
342 p
= &parent
->rb_right
;
344 atomic_inc(&sp
->so_count
);
348 nfs_alloc_unique_id(&clp
->cl_openowner_id
, &new->so_owner_id
, 1, 64);
349 rb_link_node(&new->so_client_node
, parent
, p
);
350 rb_insert_color(&new->so_client_node
, &clp
->cl_state_owners
);
355 nfs4_remove_state_owner(struct nfs_client
*clp
, struct nfs4_state_owner
*sp
)
357 if (!RB_EMPTY_NODE(&sp
->so_client_node
))
358 rb_erase(&sp
->so_client_node
, &clp
->cl_state_owners
);
359 nfs_free_unique_id(&clp
->cl_openowner_id
, &sp
->so_owner_id
);
363 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
364 * create a new state_owner.
367 static struct nfs4_state_owner
*
368 nfs4_alloc_state_owner(void)
370 struct nfs4_state_owner
*sp
;
372 sp
= kzalloc(sizeof(*sp
),GFP_NOFS
);
375 spin_lock_init(&sp
->so_lock
);
376 INIT_LIST_HEAD(&sp
->so_states
);
377 rpc_init_wait_queue(&sp
->so_sequence
.wait
, "Seqid_waitqueue");
378 sp
->so_seqid
.sequence
= &sp
->so_sequence
;
379 spin_lock_init(&sp
->so_sequence
.lock
);
380 INIT_LIST_HEAD(&sp
->so_sequence
.list
);
381 atomic_set(&sp
->so_count
, 1);
386 nfs4_drop_state_owner(struct nfs4_state_owner
*sp
)
388 if (!RB_EMPTY_NODE(&sp
->so_client_node
)) {
389 struct nfs_client
*clp
= sp
->so_server
->nfs_client
;
391 spin_lock(&clp
->cl_lock
);
392 rb_erase(&sp
->so_client_node
, &clp
->cl_state_owners
);
393 RB_CLEAR_NODE(&sp
->so_client_node
);
394 spin_unlock(&clp
->cl_lock
);
398 struct nfs4_state_owner
*nfs4_get_state_owner(struct nfs_server
*server
, struct rpc_cred
*cred
)
400 struct nfs_client
*clp
= server
->nfs_client
;
401 struct nfs4_state_owner
*sp
, *new;
403 spin_lock(&clp
->cl_lock
);
404 sp
= nfs4_find_state_owner(server
, cred
);
405 spin_unlock(&clp
->cl_lock
);
408 new = nfs4_alloc_state_owner();
411 new->so_server
= server
;
413 spin_lock(&clp
->cl_lock
);
414 sp
= nfs4_insert_state_owner(clp
, new);
415 spin_unlock(&clp
->cl_lock
);
419 rpc_destroy_wait_queue(&new->so_sequence
.wait
);
425 void nfs4_put_state_owner(struct nfs4_state_owner
*sp
)
427 struct nfs_client
*clp
= sp
->so_server
->nfs_client
;
428 struct rpc_cred
*cred
= sp
->so_cred
;
430 if (!atomic_dec_and_lock(&sp
->so_count
, &clp
->cl_lock
))
432 nfs4_remove_state_owner(clp
, sp
);
433 spin_unlock(&clp
->cl_lock
);
434 rpc_destroy_wait_queue(&sp
->so_sequence
.wait
);
439 static struct nfs4_state
*
440 nfs4_alloc_open_state(void)
442 struct nfs4_state
*state
;
444 state
= kzalloc(sizeof(*state
), GFP_NOFS
);
447 atomic_set(&state
->count
, 1);
448 INIT_LIST_HEAD(&state
->lock_states
);
449 spin_lock_init(&state
->state_lock
);
450 seqlock_init(&state
->seqlock
);
455 nfs4_state_set_mode_locked(struct nfs4_state
*state
, fmode_t fmode
)
457 if (state
->state
== fmode
)
459 /* NB! List reordering - see the reclaim code for why. */
460 if ((fmode
& FMODE_WRITE
) != (state
->state
& FMODE_WRITE
)) {
461 if (fmode
& FMODE_WRITE
)
462 list_move(&state
->open_states
, &state
->owner
->so_states
);
464 list_move_tail(&state
->open_states
, &state
->owner
->so_states
);
466 state
->state
= fmode
;
469 static struct nfs4_state
*
470 __nfs4_find_state_byowner(struct inode
*inode
, struct nfs4_state_owner
*owner
)
472 struct nfs_inode
*nfsi
= NFS_I(inode
);
473 struct nfs4_state
*state
;
475 list_for_each_entry(state
, &nfsi
->open_states
, inode_states
) {
476 if (state
->owner
!= owner
)
478 if (atomic_inc_not_zero(&state
->count
))
485 nfs4_free_open_state(struct nfs4_state
*state
)
491 nfs4_get_open_state(struct inode
*inode
, struct nfs4_state_owner
*owner
)
493 struct nfs4_state
*state
, *new;
494 struct nfs_inode
*nfsi
= NFS_I(inode
);
496 spin_lock(&inode
->i_lock
);
497 state
= __nfs4_find_state_byowner(inode
, owner
);
498 spin_unlock(&inode
->i_lock
);
501 new = nfs4_alloc_open_state();
502 spin_lock(&owner
->so_lock
);
503 spin_lock(&inode
->i_lock
);
504 state
= __nfs4_find_state_byowner(inode
, owner
);
505 if (state
== NULL
&& new != NULL
) {
507 state
->owner
= owner
;
508 atomic_inc(&owner
->so_count
);
509 list_add(&state
->inode_states
, &nfsi
->open_states
);
510 state
->inode
= igrab(inode
);
511 spin_unlock(&inode
->i_lock
);
512 /* Note: The reclaim code dictates that we add stateless
513 * and read-only stateids to the end of the list */
514 list_add_tail(&state
->open_states
, &owner
->so_states
);
515 spin_unlock(&owner
->so_lock
);
517 spin_unlock(&inode
->i_lock
);
518 spin_unlock(&owner
->so_lock
);
520 nfs4_free_open_state(new);
526 void nfs4_put_open_state(struct nfs4_state
*state
)
528 struct inode
*inode
= state
->inode
;
529 struct nfs4_state_owner
*owner
= state
->owner
;
531 if (!atomic_dec_and_lock(&state
->count
, &owner
->so_lock
))
533 spin_lock(&inode
->i_lock
);
534 list_del(&state
->inode_states
);
535 list_del(&state
->open_states
);
536 spin_unlock(&inode
->i_lock
);
537 spin_unlock(&owner
->so_lock
);
539 nfs4_free_open_state(state
);
540 nfs4_put_state_owner(owner
);
544 * Close the current file.
546 static void __nfs4_close(struct path
*path
, struct nfs4_state
*state
,
547 fmode_t fmode
, gfp_t gfp_mask
, int wait
)
549 struct nfs4_state_owner
*owner
= state
->owner
;
553 atomic_inc(&owner
->so_count
);
554 /* Protect against nfs4_find_state() */
555 spin_lock(&owner
->so_lock
);
556 switch (fmode
& (FMODE_READ
| FMODE_WRITE
)) {
563 case FMODE_READ
|FMODE_WRITE
:
566 newstate
= FMODE_READ
|FMODE_WRITE
;
567 if (state
->n_rdwr
== 0) {
568 if (state
->n_rdonly
== 0) {
569 newstate
&= ~FMODE_READ
;
570 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
571 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
573 if (state
->n_wronly
== 0) {
574 newstate
&= ~FMODE_WRITE
;
575 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
576 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
579 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
581 nfs4_state_set_mode_locked(state
, newstate
);
582 spin_unlock(&owner
->so_lock
);
585 nfs4_put_open_state(state
);
586 nfs4_put_state_owner(owner
);
588 nfs4_do_close(path
, state
, gfp_mask
, wait
);
591 void nfs4_close_state(struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
593 __nfs4_close(path
, state
, fmode
, GFP_NOFS
, 0);
596 void nfs4_close_sync(struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
598 __nfs4_close(path
, state
, fmode
, GFP_KERNEL
, 1);
602 * Search the state->lock_states for an existing lock_owner
603 * that is compatible with current->files
605 static struct nfs4_lock_state
*
606 __nfs4_find_lock_state(struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
, unsigned int type
)
608 struct nfs4_lock_state
*pos
;
609 list_for_each_entry(pos
, &state
->lock_states
, ls_locks
) {
610 if (type
!= NFS4_ANY_LOCK_TYPE
&& pos
->ls_owner
.lo_type
!= type
)
612 switch (pos
->ls_owner
.lo_type
) {
613 case NFS4_POSIX_LOCK_TYPE
:
614 if (pos
->ls_owner
.lo_u
.posix_owner
!= fl_owner
)
617 case NFS4_FLOCK_LOCK_TYPE
:
618 if (pos
->ls_owner
.lo_u
.flock_owner
!= fl_pid
)
621 atomic_inc(&pos
->ls_count
);
628 * Return a compatible lock_state. If no initialized lock_state structure
629 * exists, return an uninitialized one.
632 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
)
634 struct nfs4_lock_state
*lsp
;
635 struct nfs_client
*clp
= state
->owner
->so_server
->nfs_client
;
637 lsp
= kzalloc(sizeof(*lsp
), GFP_NOFS
);
640 rpc_init_wait_queue(&lsp
->ls_sequence
.wait
, "lock_seqid_waitqueue");
641 spin_lock_init(&lsp
->ls_sequence
.lock
);
642 INIT_LIST_HEAD(&lsp
->ls_sequence
.list
);
643 lsp
->ls_seqid
.sequence
= &lsp
->ls_sequence
;
644 atomic_set(&lsp
->ls_count
, 1);
645 lsp
->ls_state
= state
;
646 lsp
->ls_owner
.lo_type
= type
;
647 switch (lsp
->ls_owner
.lo_type
) {
648 case NFS4_FLOCK_LOCK_TYPE
:
649 lsp
->ls_owner
.lo_u
.flock_owner
= fl_pid
;
651 case NFS4_POSIX_LOCK_TYPE
:
652 lsp
->ls_owner
.lo_u
.posix_owner
= fl_owner
;
658 spin_lock(&clp
->cl_lock
);
659 nfs_alloc_unique_id(&clp
->cl_lockowner_id
, &lsp
->ls_id
, 1, 64);
660 spin_unlock(&clp
->cl_lock
);
661 INIT_LIST_HEAD(&lsp
->ls_locks
);
665 static void nfs4_free_lock_state(struct nfs4_lock_state
*lsp
)
667 struct nfs_client
*clp
= lsp
->ls_state
->owner
->so_server
->nfs_client
;
669 spin_lock(&clp
->cl_lock
);
670 nfs_free_unique_id(&clp
->cl_lockowner_id
, &lsp
->ls_id
);
671 spin_unlock(&clp
->cl_lock
);
672 rpc_destroy_wait_queue(&lsp
->ls_sequence
.wait
);
677 * Return a compatible lock_state. If no initialized lock_state structure
678 * exists, return an uninitialized one.
681 static struct nfs4_lock_state
*nfs4_get_lock_state(struct nfs4_state
*state
, fl_owner_t owner
, pid_t pid
, unsigned int type
)
683 struct nfs4_lock_state
*lsp
, *new = NULL
;
686 spin_lock(&state
->state_lock
);
687 lsp
= __nfs4_find_lock_state(state
, owner
, pid
, type
);
691 list_add(&new->ls_locks
, &state
->lock_states
);
692 set_bit(LK_STATE_IN_USE
, &state
->flags
);
697 spin_unlock(&state
->state_lock
);
698 new = nfs4_alloc_lock_state(state
, owner
, pid
, type
);
702 spin_unlock(&state
->state_lock
);
704 nfs4_free_lock_state(new);
709 * Release reference to lock_state, and free it if we see that
710 * it is no longer in use
712 void nfs4_put_lock_state(struct nfs4_lock_state
*lsp
)
714 struct nfs4_state
*state
;
718 state
= lsp
->ls_state
;
719 if (!atomic_dec_and_lock(&lsp
->ls_count
, &state
->state_lock
))
721 list_del(&lsp
->ls_locks
);
722 if (list_empty(&state
->lock_states
))
723 clear_bit(LK_STATE_IN_USE
, &state
->flags
);
724 spin_unlock(&state
->state_lock
);
725 if (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
)
726 nfs4_release_lockowner(lsp
);
727 nfs4_free_lock_state(lsp
);
730 static void nfs4_fl_copy_lock(struct file_lock
*dst
, struct file_lock
*src
)
732 struct nfs4_lock_state
*lsp
= src
->fl_u
.nfs4_fl
.owner
;
734 dst
->fl_u
.nfs4_fl
.owner
= lsp
;
735 atomic_inc(&lsp
->ls_count
);
738 static void nfs4_fl_release_lock(struct file_lock
*fl
)
740 nfs4_put_lock_state(fl
->fl_u
.nfs4_fl
.owner
);
743 static const struct file_lock_operations nfs4_fl_lock_ops
= {
744 .fl_copy_lock
= nfs4_fl_copy_lock
,
745 .fl_release_private
= nfs4_fl_release_lock
,
748 int nfs4_set_lock_state(struct nfs4_state
*state
, struct file_lock
*fl
)
750 struct nfs4_lock_state
*lsp
;
752 if (fl
->fl_ops
!= NULL
)
754 if (fl
->fl_flags
& FL_POSIX
)
755 lsp
= nfs4_get_lock_state(state
, fl
->fl_owner
, 0, NFS4_POSIX_LOCK_TYPE
);
756 else if (fl
->fl_flags
& FL_FLOCK
)
757 lsp
= nfs4_get_lock_state(state
, 0, fl
->fl_pid
, NFS4_FLOCK_LOCK_TYPE
);
762 fl
->fl_u
.nfs4_fl
.owner
= lsp
;
763 fl
->fl_ops
= &nfs4_fl_lock_ops
;
768 * Byte-range lock aware utility to initialize the stateid of read/write
771 void nfs4_copy_stateid(nfs4_stateid
*dst
, struct nfs4_state
*state
, fl_owner_t fl_owner
, pid_t fl_pid
)
773 struct nfs4_lock_state
*lsp
;
777 seq
= read_seqbegin(&state
->seqlock
);
778 memcpy(dst
, &state
->stateid
, sizeof(*dst
));
779 } while (read_seqretry(&state
->seqlock
, seq
));
780 if (test_bit(LK_STATE_IN_USE
, &state
->flags
) == 0)
783 spin_lock(&state
->state_lock
);
784 lsp
= __nfs4_find_lock_state(state
, fl_owner
, fl_pid
, NFS4_ANY_LOCK_TYPE
);
785 if (lsp
!= NULL
&& (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
786 memcpy(dst
, &lsp
->ls_stateid
, sizeof(*dst
));
787 spin_unlock(&state
->state_lock
);
788 nfs4_put_lock_state(lsp
);
791 struct nfs_seqid
*nfs_alloc_seqid(struct nfs_seqid_counter
*counter
, gfp_t gfp_mask
)
793 struct nfs_seqid
*new;
795 new = kmalloc(sizeof(*new), gfp_mask
);
797 new->sequence
= counter
;
798 INIT_LIST_HEAD(&new->list
);
803 void nfs_release_seqid(struct nfs_seqid
*seqid
)
805 if (!list_empty(&seqid
->list
)) {
806 struct rpc_sequence
*sequence
= seqid
->sequence
->sequence
;
808 spin_lock(&sequence
->lock
);
809 list_del_init(&seqid
->list
);
810 spin_unlock(&sequence
->lock
);
811 rpc_wake_up(&sequence
->wait
);
815 void nfs_free_seqid(struct nfs_seqid
*seqid
)
817 nfs_release_seqid(seqid
);
822 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
823 * failed with a seqid incrementing error -
824 * see comments nfs_fs.h:seqid_mutating_error()
826 static void nfs_increment_seqid(int status
, struct nfs_seqid
*seqid
)
828 BUG_ON(list_first_entry(&seqid
->sequence
->sequence
->list
, struct nfs_seqid
, list
) != seqid
);
832 case -NFS4ERR_BAD_SEQID
:
833 if (seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)
835 printk(KERN_WARNING
"NFS: v4 server returned a bad"
836 " sequence-id error on an"
837 " unconfirmed sequence %p!\n",
839 case -NFS4ERR_STALE_CLIENTID
:
840 case -NFS4ERR_STALE_STATEID
:
841 case -NFS4ERR_BAD_STATEID
:
842 case -NFS4ERR_BADXDR
:
843 case -NFS4ERR_RESOURCE
:
844 case -NFS4ERR_NOFILEHANDLE
:
845 /* Non-seqid mutating errors */
849 * Note: no locking needed as we are guaranteed to be first
850 * on the sequence list
852 seqid
->sequence
->counter
++;
855 void nfs_increment_open_seqid(int status
, struct nfs_seqid
*seqid
)
857 struct nfs4_state_owner
*sp
= container_of(seqid
->sequence
,
858 struct nfs4_state_owner
, so_seqid
);
859 struct nfs_server
*server
= sp
->so_server
;
861 if (status
== -NFS4ERR_BAD_SEQID
)
862 nfs4_drop_state_owner(sp
);
863 if (!nfs4_has_session(server
->nfs_client
))
864 nfs_increment_seqid(status
, seqid
);
868 * Increment the seqid if the LOCK/LOCKU succeeded, or
869 * failed with a seqid incrementing error -
870 * see comments nfs_fs.h:seqid_mutating_error()
872 void nfs_increment_lock_seqid(int status
, struct nfs_seqid
*seqid
)
874 nfs_increment_seqid(status
, seqid
);
877 int nfs_wait_on_sequence(struct nfs_seqid
*seqid
, struct rpc_task
*task
)
879 struct rpc_sequence
*sequence
= seqid
->sequence
->sequence
;
882 spin_lock(&sequence
->lock
);
883 if (list_empty(&seqid
->list
))
884 list_add_tail(&seqid
->list
, &sequence
->list
);
885 if (list_first_entry(&sequence
->list
, struct nfs_seqid
, list
) == seqid
)
887 rpc_sleep_on(&sequence
->wait
, task
, NULL
);
890 spin_unlock(&sequence
->lock
);
894 static int nfs4_run_state_manager(void *);
896 static void nfs4_clear_state_manager_bit(struct nfs_client
*clp
)
898 smp_mb__before_clear_bit();
899 clear_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
);
900 smp_mb__after_clear_bit();
901 wake_up_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
);
902 rpc_wake_up(&clp
->cl_rpcwaitq
);
906 * Schedule the nfs_client asynchronous state management routine
908 void nfs4_schedule_state_manager(struct nfs_client
*clp
)
910 struct task_struct
*task
;
912 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
914 __module_get(THIS_MODULE
);
915 atomic_inc(&clp
->cl_count
);
916 task
= kthread_run(nfs4_run_state_manager
, clp
, "%s-manager",
917 rpc_peeraddr2str(clp
->cl_rpcclient
,
921 nfs4_clear_state_manager_bit(clp
);
923 module_put(THIS_MODULE
);
927 * Schedule a state recovery attempt
929 void nfs4_schedule_state_recovery(struct nfs_client
*clp
)
933 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
934 set_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
935 nfs4_schedule_state_manager(clp
);
938 int nfs4_state_mark_reclaim_reboot(struct nfs_client
*clp
, struct nfs4_state
*state
)
941 set_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
942 /* Don't recover state that expired before the reboot */
943 if (test_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
)) {
944 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
947 set_bit(NFS_OWNER_RECLAIM_REBOOT
, &state
->owner
->so_flags
);
948 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
952 int nfs4_state_mark_reclaim_nograce(struct nfs_client
*clp
, struct nfs4_state
*state
)
954 set_bit(NFS_STATE_RECLAIM_NOGRACE
, &state
->flags
);
955 clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
);
956 set_bit(NFS_OWNER_RECLAIM_NOGRACE
, &state
->owner
->so_flags
);
957 set_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
);
961 static int nfs4_reclaim_locks(struct nfs4_state
*state
, const struct nfs4_state_recovery_ops
*ops
)
963 struct inode
*inode
= state
->inode
;
964 struct nfs_inode
*nfsi
= NFS_I(inode
);
965 struct file_lock
*fl
;
968 if (inode
->i_flock
== NULL
)
971 /* Guard against delegation returns and new lock/unlock calls */
972 down_write(&nfsi
->rwsem
);
973 /* Protect inode->i_flock using the BKL */
975 for (fl
= inode
->i_flock
; fl
!= NULL
; fl
= fl
->fl_next
) {
976 if (!(fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)))
978 if (nfs_file_open_context(fl
->fl_file
)->state
!= state
)
981 status
= ops
->recover_lock(state
, fl
);
986 case -NFS4ERR_ADMIN_REVOKED
:
987 case -NFS4ERR_STALE_STATEID
:
988 case -NFS4ERR_BAD_STATEID
:
989 case -NFS4ERR_EXPIRED
:
990 case -NFS4ERR_NO_GRACE
:
991 case -NFS4ERR_STALE_CLIENTID
:
992 case -NFS4ERR_BADSESSION
:
993 case -NFS4ERR_BADSLOT
:
994 case -NFS4ERR_BAD_HIGH_SLOT
:
995 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
998 printk(KERN_ERR
"%s: unhandled error %d. Zeroing state\n",
1001 case -NFS4ERR_DENIED
:
1002 case -NFS4ERR_RECLAIM_BAD
:
1003 case -NFS4ERR_RECLAIM_CONFLICT
:
1004 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1011 up_write(&nfsi
->rwsem
);
1015 static int nfs4_reclaim_open_state(struct nfs4_state_owner
*sp
, const struct nfs4_state_recovery_ops
*ops
)
1017 struct nfs4_state
*state
;
1018 struct nfs4_lock_state
*lock
;
1021 /* Note: we rely on the sp->so_states list being ordered
1022 * so that we always reclaim open(O_RDWR) and/or open(O_WRITE)
1024 * This is needed to ensure that the server won't give us any
1025 * read delegations that we have to return if, say, we are
1026 * recovering after a network partition or a reboot from a
1027 * server that doesn't support a grace period.
1030 spin_lock(&sp
->so_lock
);
1031 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1032 if (!test_and_clear_bit(ops
->state_flag_bit
, &state
->flags
))
1034 if (state
->state
== 0)
1036 atomic_inc(&state
->count
);
1037 spin_unlock(&sp
->so_lock
);
1038 status
= ops
->recover_open(sp
, state
);
1040 status
= nfs4_reclaim_locks(state
, ops
);
1042 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1043 if (!(lock
->ls_flags
& NFS_LOCK_INITIALIZED
))
1044 printk("%s: Lock reclaim failed!\n",
1047 nfs4_put_open_state(state
);
1053 printk(KERN_ERR
"%s: unhandled error %d. Zeroing state\n",
1059 * Open state on this file cannot be recovered
1060 * All we can do is revert to using the zero stateid.
1062 memset(state
->stateid
.data
, 0,
1063 sizeof(state
->stateid
.data
));
1064 /* Mark the file as being 'closed' */
1069 * User RPCSEC_GSS context has expired.
1070 * We cannot recover this stateid now, so
1071 * skip it and allow recovery thread to
1075 case -NFS4ERR_ADMIN_REVOKED
:
1076 case -NFS4ERR_STALE_STATEID
:
1077 case -NFS4ERR_BAD_STATEID
:
1078 case -NFS4ERR_RECLAIM_BAD
:
1079 case -NFS4ERR_RECLAIM_CONFLICT
:
1080 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1082 case -NFS4ERR_EXPIRED
:
1083 case -NFS4ERR_NO_GRACE
:
1084 nfs4_state_mark_reclaim_nograce(sp
->so_server
->nfs_client
, state
);
1085 case -NFS4ERR_STALE_CLIENTID
:
1086 case -NFS4ERR_BADSESSION
:
1087 case -NFS4ERR_BADSLOT
:
1088 case -NFS4ERR_BAD_HIGH_SLOT
:
1089 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1092 nfs4_put_open_state(state
);
1095 spin_unlock(&sp
->so_lock
);
1098 nfs4_put_open_state(state
);
1102 static void nfs4_clear_open_state(struct nfs4_state
*state
)
1104 struct nfs4_lock_state
*lock
;
1106 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1107 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1108 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1109 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1110 list_for_each_entry(lock
, &state
->lock_states
, ls_locks
) {
1111 lock
->ls_seqid
.flags
= 0;
1112 lock
->ls_flags
&= ~NFS_LOCK_INITIALIZED
;
1116 static void nfs4_state_mark_reclaim_helper(struct nfs_client
*clp
, int (*mark_reclaim
)(struct nfs_client
*clp
, struct nfs4_state
*state
))
1118 struct nfs4_state_owner
*sp
;
1119 struct rb_node
*pos
;
1120 struct nfs4_state
*state
;
1122 /* Reset all sequence ids to zero */
1123 for (pos
= rb_first(&clp
->cl_state_owners
); pos
!= NULL
; pos
= rb_next(pos
)) {
1124 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_client_node
);
1125 sp
->so_seqid
.flags
= 0;
1126 spin_lock(&sp
->so_lock
);
1127 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1128 if (mark_reclaim(clp
, state
))
1129 nfs4_clear_open_state(state
);
1131 spin_unlock(&sp
->so_lock
);
1135 static void nfs4_state_start_reclaim_reboot(struct nfs_client
*clp
)
1137 /* Mark all delegations for reclaim */
1138 nfs_delegation_mark_reclaim(clp
);
1139 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_reboot
);
1142 static void nfs4_reclaim_complete(struct nfs_client
*clp
,
1143 const struct nfs4_state_recovery_ops
*ops
)
1145 /* Notify the server we're done reclaiming our state */
1146 if (ops
->reclaim_complete
)
1147 (void)ops
->reclaim_complete(clp
);
1150 static int nfs4_state_clear_reclaim_reboot(struct nfs_client
*clp
)
1152 struct nfs4_state_owner
*sp
;
1153 struct rb_node
*pos
;
1154 struct nfs4_state
*state
;
1156 if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1159 for (pos
= rb_first(&clp
->cl_state_owners
); pos
!= NULL
; pos
= rb_next(pos
)) {
1160 sp
= rb_entry(pos
, struct nfs4_state_owner
, so_client_node
);
1161 spin_lock(&sp
->so_lock
);
1162 list_for_each_entry(state
, &sp
->so_states
, open_states
) {
1163 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT
, &state
->flags
))
1165 nfs4_state_mark_reclaim_nograce(clp
, state
);
1167 spin_unlock(&sp
->so_lock
);
1170 nfs_delegation_reap_unclaimed(clp
);
1174 static void nfs4_state_end_reclaim_reboot(struct nfs_client
*clp
)
1176 if (!nfs4_state_clear_reclaim_reboot(clp
))
1178 nfs4_reclaim_complete(clp
, clp
->cl_mvops
->reboot_recovery_ops
);
1181 static void nfs_delegation_clear_all(struct nfs_client
*clp
)
1183 nfs_delegation_mark_reclaim(clp
);
1184 nfs_delegation_reap_unclaimed(clp
);
1187 static void nfs4_state_start_reclaim_nograce(struct nfs_client
*clp
)
1189 nfs_delegation_clear_all(clp
);
1190 nfs4_state_mark_reclaim_helper(clp
, nfs4_state_mark_reclaim_nograce
);
1193 static void nfs4_warn_keyexpired(const char *s
)
1195 printk_ratelimited(KERN_WARNING
"Error: state manager"
1196 " encountered RPCSEC_GSS session"
1197 " expired against NFSv4 server %s.\n",
1201 static int nfs4_recovery_handle_error(struct nfs_client
*clp
, int error
)
1204 case -NFS4ERR_CB_PATH_DOWN
:
1205 nfs_handle_cb_pathdown(clp
);
1207 case -NFS4ERR_NO_GRACE
:
1208 nfs4_state_end_reclaim_reboot(clp
);
1210 case -NFS4ERR_STALE_CLIENTID
:
1211 case -NFS4ERR_LEASE_MOVED
:
1212 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1213 nfs4_state_clear_reclaim_reboot(clp
);
1214 nfs4_state_start_reclaim_reboot(clp
);
1216 case -NFS4ERR_EXPIRED
:
1217 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1218 nfs4_state_start_reclaim_nograce(clp
);
1220 case -NFS4ERR_BADSESSION
:
1221 case -NFS4ERR_BADSLOT
:
1222 case -NFS4ERR_BAD_HIGH_SLOT
:
1223 case -NFS4ERR_DEADSESSION
:
1224 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1225 case -NFS4ERR_SEQ_FALSE_RETRY
:
1226 case -NFS4ERR_SEQ_MISORDERED
:
1227 set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
);
1228 /* Zero session reset errors */
1231 /* Nothing we can do */
1232 nfs4_warn_keyexpired(clp
->cl_hostname
);
1238 static int nfs4_do_reclaim(struct nfs_client
*clp
, const struct nfs4_state_recovery_ops
*ops
)
1240 struct rb_node
*pos
;
1244 spin_lock(&clp
->cl_lock
);
1245 for (pos
= rb_first(&clp
->cl_state_owners
); pos
!= NULL
; pos
= rb_next(pos
)) {
1246 struct nfs4_state_owner
*sp
= rb_entry(pos
, struct nfs4_state_owner
, so_client_node
);
1247 if (!test_and_clear_bit(ops
->owner_flag_bit
, &sp
->so_flags
))
1249 atomic_inc(&sp
->so_count
);
1250 spin_unlock(&clp
->cl_lock
);
1251 status
= nfs4_reclaim_open_state(sp
, ops
);
1253 set_bit(ops
->owner_flag_bit
, &sp
->so_flags
);
1254 nfs4_put_state_owner(sp
);
1255 return nfs4_recovery_handle_error(clp
, status
);
1257 nfs4_put_state_owner(sp
);
1260 spin_unlock(&clp
->cl_lock
);
1264 static int nfs4_check_lease(struct nfs_client
*clp
)
1266 struct rpc_cred
*cred
;
1267 const struct nfs4_state_maintenance_ops
*ops
=
1268 clp
->cl_mvops
->state_renewal_ops
;
1269 int status
= -NFS4ERR_EXPIRED
;
1271 /* Is the client already known to have an expired lease? */
1272 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1274 spin_lock(&clp
->cl_lock
);
1275 cred
= ops
->get_state_renewal_cred_locked(clp
);
1276 spin_unlock(&clp
->cl_lock
);
1278 cred
= nfs4_get_setclientid_cred(clp
);
1282 status
= ops
->renew_lease(clp
, cred
);
1285 return nfs4_recovery_handle_error(clp
, status
);
1288 static int nfs4_reclaim_lease(struct nfs_client
*clp
)
1290 struct rpc_cred
*cred
;
1291 const struct nfs4_state_recovery_ops
*ops
=
1292 clp
->cl_mvops
->reboot_recovery_ops
;
1293 int status
= -ENOENT
;
1295 cred
= ops
->get_clid_cred(clp
);
1297 status
= ops
->establish_clid(clp
, cred
);
1299 /* Handle case where the user hasn't set up machine creds */
1300 if (status
== -EACCES
&& cred
== clp
->cl_machine_cred
) {
1301 nfs4_clear_machine_cred(clp
);
1304 if (status
== -NFS4ERR_MINOR_VERS_MISMATCH
)
1305 status
= -EPROTONOSUPPORT
;
1310 #ifdef CONFIG_NFS_V4_1
1311 void nfs41_handle_recall_slot(struct nfs_client
*clp
)
1313 set_bit(NFS4CLNT_RECALL_SLOT
, &clp
->cl_state
);
1314 nfs4_schedule_state_recovery(clp
);
1317 static void nfs4_reset_all_state(struct nfs_client
*clp
)
1319 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1320 clp
->cl_boot_time
= CURRENT_TIME
;
1321 nfs4_state_start_reclaim_nograce(clp
);
1322 nfs4_schedule_state_recovery(clp
);
1326 static void nfs41_handle_server_reboot(struct nfs_client
*clp
)
1328 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) == 0) {
1329 nfs4_state_start_reclaim_reboot(clp
);
1330 nfs4_schedule_state_recovery(clp
);
1334 static void nfs41_handle_state_revoked(struct nfs_client
*clp
)
1337 nfs4_reset_all_state(clp
);
1340 static void nfs41_handle_recallable_state_revoked(struct nfs_client
*clp
)
1342 /* This will need to handle layouts too */
1343 nfs_expire_all_delegations(clp
);
1346 static void nfs41_handle_cb_path_down(struct nfs_client
*clp
)
1348 nfs_expire_all_delegations(clp
);
1349 if (test_and_set_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) == 0)
1350 nfs4_schedule_state_recovery(clp
);
1353 void nfs41_handle_sequence_flag_errors(struct nfs_client
*clp
, u32 flags
)
1357 else if (flags
& SEQ4_STATUS_RESTART_RECLAIM_NEEDED
)
1358 nfs41_handle_server_reboot(clp
);
1359 else if (flags
& (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED
|
1360 SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED
|
1361 SEQ4_STATUS_ADMIN_STATE_REVOKED
|
1362 SEQ4_STATUS_LEASE_MOVED
))
1363 nfs41_handle_state_revoked(clp
);
1364 else if (flags
& SEQ4_STATUS_RECALLABLE_STATE_REVOKED
)
1365 nfs41_handle_recallable_state_revoked(clp
);
1366 else if (flags
& (SEQ4_STATUS_CB_PATH_DOWN
|
1367 SEQ4_STATUS_BACKCHANNEL_FAULT
|
1368 SEQ4_STATUS_CB_PATH_DOWN_SESSION
))
1369 nfs41_handle_cb_path_down(clp
);
1372 static int nfs4_reset_session(struct nfs_client
*clp
)
1376 nfs4_begin_drain_session(clp
);
1377 status
= nfs4_proc_destroy_session(clp
->cl_session
);
1378 if (status
&& status
!= -NFS4ERR_BADSESSION
&&
1379 status
!= -NFS4ERR_DEADSESSION
) {
1380 status
= nfs4_recovery_handle_error(clp
, status
);
1384 memset(clp
->cl_session
->sess_id
.data
, 0, NFS4_MAX_SESSIONID_LEN
);
1385 status
= nfs4_proc_create_session(clp
);
1387 status
= nfs4_recovery_handle_error(clp
, status
);
1390 /* create_session negotiated new slot table */
1391 clear_bit(NFS4CLNT_RECALL_SLOT
, &clp
->cl_state
);
1393 /* Let the state manager reestablish state */
1394 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1395 nfs41_setup_state_renewal(clp
);
1400 static int nfs4_recall_slot(struct nfs_client
*clp
)
1402 struct nfs4_slot_table
*fc_tbl
= &clp
->cl_session
->fc_slot_table
;
1403 struct nfs4_channel_attrs
*fc_attrs
= &clp
->cl_session
->fc_attrs
;
1404 struct nfs4_slot
*new, *old
;
1407 nfs4_begin_drain_session(clp
);
1408 new = kmalloc(fc_tbl
->target_max_slots
* sizeof(struct nfs4_slot
),
1413 spin_lock(&fc_tbl
->slot_tbl_lock
);
1414 for (i
= 0; i
< fc_tbl
->target_max_slots
; i
++)
1415 new[i
].seq_nr
= fc_tbl
->slots
[i
].seq_nr
;
1416 old
= fc_tbl
->slots
;
1417 fc_tbl
->slots
= new;
1418 fc_tbl
->max_slots
= fc_tbl
->target_max_slots
;
1419 fc_tbl
->target_max_slots
= 0;
1420 fc_attrs
->max_reqs
= fc_tbl
->max_slots
;
1421 spin_unlock(&fc_tbl
->slot_tbl_lock
);
1424 nfs4_end_drain_session(clp
);
1428 #else /* CONFIG_NFS_V4_1 */
1429 static int nfs4_reset_session(struct nfs_client
*clp
) { return 0; }
1430 static int nfs4_end_drain_session(struct nfs_client
*clp
) { return 0; }
1431 static int nfs4_recall_slot(struct nfs_client
*clp
) { return 0; }
1432 #endif /* CONFIG_NFS_V4_1 */
1434 /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
1435 * on EXCHANGE_ID for v4.1
1437 static void nfs4_set_lease_expired(struct nfs_client
*clp
, int status
)
1439 if (nfs4_has_session(clp
)) {
1441 case -NFS4ERR_DELAY
:
1442 case -NFS4ERR_CLID_INUSE
:
1447 nfs4_warn_keyexpired(clp
->cl_hostname
);
1448 case -NFS4ERR_NOT_SAME
: /* FixMe: implement recovery
1449 * in nfs4_exchange_id */
1454 set_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
1457 static void nfs4_state_manager(struct nfs_client
*clp
)
1461 /* Ensure exclusive access to NFSv4 state */
1463 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
)) {
1464 /* We're going to have to re-establish a clientid */
1465 status
= nfs4_reclaim_lease(clp
);
1467 nfs4_set_lease_expired(clp
, status
);
1468 if (test_bit(NFS4CLNT_LEASE_EXPIRED
,
1471 if (clp
->cl_cons_state
==
1472 NFS_CS_SESSION_INITING
)
1473 nfs_mark_client_ready(clp
, status
);
1476 clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
);
1477 set_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
);
1480 if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE
, &clp
->cl_state
)) {
1481 status
= nfs4_check_lease(clp
);
1482 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1484 if (status
< 0 && status
!= -NFS4ERR_CB_PATH_DOWN
)
1488 /* Initialize or reset the session */
1489 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
)
1490 && nfs4_has_session(clp
)) {
1491 status
= nfs4_reset_session(clp
);
1492 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
1498 /* First recover reboot state... */
1499 if (test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
)) {
1500 status
= nfs4_do_reclaim(clp
,
1501 clp
->cl_mvops
->reboot_recovery_ops
);
1502 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
1503 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
))
1505 nfs4_state_end_reclaim_reboot(clp
);
1506 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
))
1512 /* Now recover expired state... */
1513 if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE
, &clp
->cl_state
)) {
1514 status
= nfs4_do_reclaim(clp
,
1515 clp
->cl_mvops
->nograce_recovery_ops
);
1516 if (test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) ||
1517 test_bit(NFS4CLNT_SESSION_RESET
, &clp
->cl_state
) ||
1518 test_bit(NFS4CLNT_RECLAIM_REBOOT
, &clp
->cl_state
))
1524 nfs4_end_drain_session(clp
);
1525 if (test_and_clear_bit(NFS4CLNT_DELEGRETURN
, &clp
->cl_state
)) {
1526 nfs_client_return_marked_delegations(clp
);
1529 /* Recall session slots */
1530 if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT
, &clp
->cl_state
)
1531 && nfs4_has_session(clp
)) {
1532 status
= nfs4_recall_slot(clp
);
1539 nfs4_clear_state_manager_bit(clp
);
1540 /* Did we race with an attempt to give us more work? */
1541 if (clp
->cl_state
== 0)
1543 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) != 0)
1548 printk(KERN_WARNING
"Error: state manager failed on NFSv4 server %s"
1549 " with error %d\n", clp
->cl_hostname
, -status
);
1550 nfs4_end_drain_session(clp
);
1551 nfs4_clear_state_manager_bit(clp
);
1554 static int nfs4_run_state_manager(void *ptr
)
1556 struct nfs_client
*clp
= ptr
;
1558 allow_signal(SIGKILL
);
1559 nfs4_state_manager(clp
);
1560 nfs_put_client(clp
);
1561 module_put_and_exit(0);