2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/jhash.h>
48 #include "current_stateid.h"
53 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 #define all_ones {{~0,~0},~0}
56 static const stateid_t one_stateid
= {
58 .si_opaque
= all_ones
,
60 static const stateid_t zero_stateid
= {
63 static const stateid_t currentstateid
= {
67 static u64 current_sessionid
= 1;
69 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
70 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
71 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
73 /* forward declarations */
74 static bool check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
);
75 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(state_lock
);
87 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
88 * the refcount on the open stateid to drop.
90 static DECLARE_WAIT_QUEUE_HEAD(close_wq
);
92 static struct kmem_cache
*openowner_slab
;
93 static struct kmem_cache
*lockowner_slab
;
94 static struct kmem_cache
*file_slab
;
95 static struct kmem_cache
*stateid_slab
;
96 static struct kmem_cache
*deleg_slab
;
97 static struct kmem_cache
*odstate_slab
;
99 static void free_session(struct nfsd4_session
*);
101 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
;
102 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops
;
104 static bool is_session_dead(struct nfsd4_session
*ses
)
106 return ses
->se_flags
& NFS4_SESSION_DEAD
;
109 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
111 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
112 return nfserr_jukebox
;
113 ses
->se_flags
|= NFS4_SESSION_DEAD
;
117 static bool is_client_expired(struct nfs4_client
*clp
)
119 return clp
->cl_time
== 0;
122 static __be32
get_client_locked(struct nfs4_client
*clp
)
124 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
126 lockdep_assert_held(&nn
->client_lock
);
128 if (is_client_expired(clp
))
129 return nfserr_expired
;
130 atomic_inc(&clp
->cl_refcount
);
134 /* must be called under the client_lock */
136 renew_client_locked(struct nfs4_client
*clp
)
138 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
140 if (is_client_expired(clp
)) {
142 printk("%s: client (clientid %08x/%08x) already expired\n",
144 clp
->cl_clientid
.cl_boot
,
145 clp
->cl_clientid
.cl_id
);
149 dprintk("renewing client (clientid %08x/%08x)\n",
150 clp
->cl_clientid
.cl_boot
,
151 clp
->cl_clientid
.cl_id
);
152 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
153 clp
->cl_time
= get_seconds();
156 static void put_client_renew_locked(struct nfs4_client
*clp
)
158 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
160 lockdep_assert_held(&nn
->client_lock
);
162 if (!atomic_dec_and_test(&clp
->cl_refcount
))
164 if (!is_client_expired(clp
))
165 renew_client_locked(clp
);
168 static void put_client_renew(struct nfs4_client
*clp
)
170 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
172 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
174 if (!is_client_expired(clp
))
175 renew_client_locked(clp
);
176 spin_unlock(&nn
->client_lock
);
179 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
183 if (is_session_dead(ses
))
184 return nfserr_badsession
;
185 status
= get_client_locked(ses
->se_client
);
188 atomic_inc(&ses
->se_ref
);
192 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
194 struct nfs4_client
*clp
= ses
->se_client
;
195 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
197 lockdep_assert_held(&nn
->client_lock
);
199 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
201 put_client_renew_locked(clp
);
204 static void nfsd4_put_session(struct nfsd4_session
*ses
)
206 struct nfs4_client
*clp
= ses
->se_client
;
207 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
209 spin_lock(&nn
->client_lock
);
210 nfsd4_put_session_locked(ses
);
211 spin_unlock(&nn
->client_lock
);
214 static struct nfsd4_blocked_lock
*
215 find_blocked_lock(struct nfs4_lockowner
*lo
, struct knfsd_fh
*fh
,
218 struct nfsd4_blocked_lock
*cur
, *found
= NULL
;
220 spin_lock(&nn
->blocked_locks_lock
);
221 list_for_each_entry(cur
, &lo
->lo_blocked
, nbl_list
) {
222 if (fh_match(fh
, &cur
->nbl_fh
)) {
223 list_del_init(&cur
->nbl_list
);
224 list_del_init(&cur
->nbl_lru
);
229 spin_unlock(&nn
->blocked_locks_lock
);
231 posix_unblock_lock(&found
->nbl_lock
);
235 static struct nfsd4_blocked_lock
*
236 find_or_allocate_block(struct nfs4_lockowner
*lo
, struct knfsd_fh
*fh
,
239 struct nfsd4_blocked_lock
*nbl
;
241 nbl
= find_blocked_lock(lo
, fh
, nn
);
243 nbl
= kmalloc(sizeof(*nbl
), GFP_KERNEL
);
245 fh_copy_shallow(&nbl
->nbl_fh
, fh
);
246 locks_init_lock(&nbl
->nbl_lock
);
247 nfsd4_init_cb(&nbl
->nbl_cb
, lo
->lo_owner
.so_client
,
248 &nfsd4_cb_notify_lock_ops
,
249 NFSPROC4_CLNT_CB_NOTIFY_LOCK
);
256 free_blocked_lock(struct nfsd4_blocked_lock
*nbl
)
258 locks_release_private(&nbl
->nbl_lock
);
263 nfsd4_cb_notify_lock_done(struct nfsd4_callback
*cb
, struct rpc_task
*task
)
266 * Since this is just an optimization, we don't try very hard if it
267 * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and
268 * just quit trying on anything else.
270 switch (task
->tk_status
) {
272 rpc_delay(task
, 1 * HZ
);
280 nfsd4_cb_notify_lock_release(struct nfsd4_callback
*cb
)
282 struct nfsd4_blocked_lock
*nbl
= container_of(cb
,
283 struct nfsd4_blocked_lock
, nbl_cb
);
285 free_blocked_lock(nbl
);
288 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops
= {
289 .done
= nfsd4_cb_notify_lock_done
,
290 .release
= nfsd4_cb_notify_lock_release
,
293 static inline struct nfs4_stateowner
*
294 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
296 atomic_inc(&sop
->so_count
);
301 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
303 return (sop
->so_owner
.len
== owner
->len
) &&
304 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
307 static struct nfs4_openowner
*
308 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
309 struct nfs4_client
*clp
)
311 struct nfs4_stateowner
*so
;
313 lockdep_assert_held(&clp
->cl_lock
);
315 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
317 if (!so
->so_is_open_owner
)
319 if (same_owner_str(so
, &open
->op_owner
))
320 return openowner(nfs4_get_stateowner(so
));
325 static struct nfs4_openowner
*
326 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
327 struct nfs4_client
*clp
)
329 struct nfs4_openowner
*oo
;
331 spin_lock(&clp
->cl_lock
);
332 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
333 spin_unlock(&clp
->cl_lock
);
338 opaque_hashval(const void *ptr
, int nbytes
)
340 unsigned char *cptr
= (unsigned char *) ptr
;
350 static void nfsd4_free_file_rcu(struct rcu_head
*rcu
)
352 struct nfs4_file
*fp
= container_of(rcu
, struct nfs4_file
, fi_rcu
);
354 kmem_cache_free(file_slab
, fp
);
358 put_nfs4_file(struct nfs4_file
*fi
)
360 might_lock(&state_lock
);
362 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
363 hlist_del_rcu(&fi
->fi_hash
);
364 spin_unlock(&state_lock
);
365 WARN_ON_ONCE(!list_empty(&fi
->fi_clnt_odstate
));
366 WARN_ON_ONCE(!list_empty(&fi
->fi_delegations
));
367 call_rcu(&fi
->fi_rcu
, nfsd4_free_file_rcu
);
372 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
374 if (f
->fi_fds
[oflag
])
375 return get_file(f
->fi_fds
[oflag
]);
380 find_writeable_file_locked(struct nfs4_file
*f
)
384 lockdep_assert_held(&f
->fi_lock
);
386 ret
= __nfs4_get_fd(f
, O_WRONLY
);
388 ret
= __nfs4_get_fd(f
, O_RDWR
);
393 find_writeable_file(struct nfs4_file
*f
)
397 spin_lock(&f
->fi_lock
);
398 ret
= find_writeable_file_locked(f
);
399 spin_unlock(&f
->fi_lock
);
404 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
408 lockdep_assert_held(&f
->fi_lock
);
410 ret
= __nfs4_get_fd(f
, O_RDONLY
);
412 ret
= __nfs4_get_fd(f
, O_RDWR
);
417 find_readable_file(struct nfs4_file
*f
)
421 spin_lock(&f
->fi_lock
);
422 ret
= find_readable_file_locked(f
);
423 spin_unlock(&f
->fi_lock
);
429 find_any_file(struct nfs4_file
*f
)
433 spin_lock(&f
->fi_lock
);
434 ret
= __nfs4_get_fd(f
, O_RDWR
);
436 ret
= __nfs4_get_fd(f
, O_WRONLY
);
438 ret
= __nfs4_get_fd(f
, O_RDONLY
);
440 spin_unlock(&f
->fi_lock
);
444 static atomic_long_t num_delegations
;
445 unsigned long max_delegations
;
448 * Open owner state (share locks)
451 /* hash tables for lock and open owners */
452 #define OWNER_HASH_BITS 8
453 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
454 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
456 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
460 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
461 return ret
& OWNER_HASH_MASK
;
464 /* hash table for nfs4_file */
465 #define FILE_HASH_BITS 8
466 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
468 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
470 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
473 static unsigned int file_hashval(struct knfsd_fh
*fh
)
475 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
478 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
481 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
483 lockdep_assert_held(&fp
->fi_lock
);
485 if (access
& NFS4_SHARE_ACCESS_WRITE
)
486 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
487 if (access
& NFS4_SHARE_ACCESS_READ
)
488 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
492 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
494 lockdep_assert_held(&fp
->fi_lock
);
496 /* Does this access mode make sense? */
497 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
500 /* Does it conflict with a deny mode already set? */
501 if ((access
& fp
->fi_share_deny
) != 0)
502 return nfserr_share_denied
;
504 __nfs4_file_get_access(fp
, access
);
508 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
510 /* Common case is that there is no deny mode. */
512 /* Does this deny mode make sense? */
513 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
516 if ((deny
& NFS4_SHARE_DENY_READ
) &&
517 atomic_read(&fp
->fi_access
[O_RDONLY
]))
518 return nfserr_share_denied
;
520 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
521 atomic_read(&fp
->fi_access
[O_WRONLY
]))
522 return nfserr_share_denied
;
527 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
529 might_lock(&fp
->fi_lock
);
531 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
532 struct file
*f1
= NULL
;
533 struct file
*f2
= NULL
;
535 swap(f1
, fp
->fi_fds
[oflag
]);
536 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
537 swap(f2
, fp
->fi_fds
[O_RDWR
]);
538 spin_unlock(&fp
->fi_lock
);
546 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
548 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
550 if (access
& NFS4_SHARE_ACCESS_WRITE
)
551 __nfs4_file_put_access(fp
, O_WRONLY
);
552 if (access
& NFS4_SHARE_ACCESS_READ
)
553 __nfs4_file_put_access(fp
, O_RDONLY
);
557 * Allocate a new open/delegation state counter. This is needed for
558 * pNFS for proper return on close semantics.
560 * Note that we only allocate it for pNFS-enabled exports, otherwise
561 * all pointers to struct nfs4_clnt_odstate are always NULL.
563 static struct nfs4_clnt_odstate
*
564 alloc_clnt_odstate(struct nfs4_client
*clp
)
566 struct nfs4_clnt_odstate
*co
;
568 co
= kmem_cache_zalloc(odstate_slab
, GFP_KERNEL
);
571 atomic_set(&co
->co_odcount
, 1);
577 hash_clnt_odstate_locked(struct nfs4_clnt_odstate
*co
)
579 struct nfs4_file
*fp
= co
->co_file
;
581 lockdep_assert_held(&fp
->fi_lock
);
582 list_add(&co
->co_perfile
, &fp
->fi_clnt_odstate
);
586 get_clnt_odstate(struct nfs4_clnt_odstate
*co
)
589 atomic_inc(&co
->co_odcount
);
593 put_clnt_odstate(struct nfs4_clnt_odstate
*co
)
595 struct nfs4_file
*fp
;
601 if (atomic_dec_and_lock(&co
->co_odcount
, &fp
->fi_lock
)) {
602 list_del(&co
->co_perfile
);
603 spin_unlock(&fp
->fi_lock
);
605 nfsd4_return_all_file_layouts(co
->co_client
, fp
);
606 kmem_cache_free(odstate_slab
, co
);
610 static struct nfs4_clnt_odstate
*
611 find_or_hash_clnt_odstate(struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*new)
613 struct nfs4_clnt_odstate
*co
;
614 struct nfs4_client
*cl
;
621 spin_lock(&fp
->fi_lock
);
622 list_for_each_entry(co
, &fp
->fi_clnt_odstate
, co_perfile
) {
623 if (co
->co_client
== cl
) {
624 get_clnt_odstate(co
);
630 hash_clnt_odstate_locked(new);
632 spin_unlock(&fp
->fi_lock
);
636 struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
,
637 void (*sc_free
)(struct nfs4_stid
*))
639 struct nfs4_stid
*stid
;
642 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
646 idr_preload(GFP_KERNEL
);
647 spin_lock(&cl
->cl_lock
);
648 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
649 spin_unlock(&cl
->cl_lock
);
654 stid
->sc_free
= sc_free
;
655 stid
->sc_client
= cl
;
656 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
657 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
658 /* Will be incremented before return to client: */
659 atomic_set(&stid
->sc_count
, 1);
660 spin_lock_init(&stid
->sc_lock
);
663 * It shouldn't be a problem to reuse an opaque stateid value.
664 * I don't think it is for 4.1. But with 4.0 I worry that, for
665 * example, a stray write retransmission could be accepted by
666 * the server when it should have been rejected. Therefore,
667 * adopt a trick from the sctp code to attempt to maximize the
668 * amount of time until an id is reused, by ensuring they always
669 * "increase" (mod INT_MAX):
673 kmem_cache_free(slab
, stid
);
677 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
679 struct nfs4_stid
*stid
;
681 stid
= nfs4_alloc_stid(clp
, stateid_slab
, nfs4_free_ol_stateid
);
685 return openlockstateid(stid
);
688 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
690 kmem_cache_free(deleg_slab
, stid
);
691 atomic_long_dec(&num_delegations
);
695 * When we recall a delegation, we should be careful not to hand it
696 * out again straight away.
697 * To ensure this we keep a pair of bloom filters ('new' and 'old')
698 * in which the filehandles of recalled delegations are "stored".
699 * If a filehandle appear in either filter, a delegation is blocked.
700 * When a delegation is recalled, the filehandle is stored in the "new"
702 * Every 30 seconds we swap the filters and clear the "new" one,
703 * unless both are empty of course.
705 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
706 * low 3 bytes as hash-table indices.
708 * 'blocked_delegations_lock', which is always taken in block_delegations(),
709 * is used to manage concurrent access. Testing does not need the lock
710 * except when swapping the two filters.
712 static DEFINE_SPINLOCK(blocked_delegations_lock
);
713 static struct bloom_pair
{
714 int entries
, old_entries
;
716 int new; /* index into 'set' */
717 DECLARE_BITMAP(set
[2], 256);
718 } blocked_delegations
;
720 static int delegation_blocked(struct knfsd_fh
*fh
)
723 struct bloom_pair
*bd
= &blocked_delegations
;
725 if (bd
->entries
== 0)
727 if (seconds_since_boot() - bd
->swap_time
> 30) {
728 spin_lock(&blocked_delegations_lock
);
729 if (seconds_since_boot() - bd
->swap_time
> 30) {
730 bd
->entries
-= bd
->old_entries
;
731 bd
->old_entries
= bd
->entries
;
732 memset(bd
->set
[bd
->new], 0,
735 bd
->swap_time
= seconds_since_boot();
737 spin_unlock(&blocked_delegations_lock
);
739 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
740 if (test_bit(hash
&255, bd
->set
[0]) &&
741 test_bit((hash
>>8)&255, bd
->set
[0]) &&
742 test_bit((hash
>>16)&255, bd
->set
[0]))
745 if (test_bit(hash
&255, bd
->set
[1]) &&
746 test_bit((hash
>>8)&255, bd
->set
[1]) &&
747 test_bit((hash
>>16)&255, bd
->set
[1]))
753 static void block_delegations(struct knfsd_fh
*fh
)
756 struct bloom_pair
*bd
= &blocked_delegations
;
758 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
760 spin_lock(&blocked_delegations_lock
);
761 __set_bit(hash
&255, bd
->set
[bd
->new]);
762 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
763 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
764 if (bd
->entries
== 0)
765 bd
->swap_time
= seconds_since_boot();
767 spin_unlock(&blocked_delegations_lock
);
770 static struct nfs4_delegation
*
771 alloc_init_deleg(struct nfs4_client
*clp
, struct svc_fh
*current_fh
,
772 struct nfs4_clnt_odstate
*odstate
)
774 struct nfs4_delegation
*dp
;
777 dprintk("NFSD alloc_init_deleg\n");
778 n
= atomic_long_inc_return(&num_delegations
);
779 if (n
< 0 || n
> max_delegations
)
781 if (delegation_blocked(¤t_fh
->fh_handle
))
783 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
, nfs4_free_deleg
));
788 * delegation seqid's are never incremented. The 4.1 special
789 * meaning of seqid 0 isn't meaningful, really, but let's avoid
790 * 0 anyway just for consistency and use 1:
792 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
793 INIT_LIST_HEAD(&dp
->dl_perfile
);
794 INIT_LIST_HEAD(&dp
->dl_perclnt
);
795 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
796 dp
->dl_clnt_odstate
= odstate
;
797 get_clnt_odstate(odstate
);
798 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
800 nfsd4_init_cb(&dp
->dl_recall
, dp
->dl_stid
.sc_client
,
801 &nfsd4_cb_recall_ops
, NFSPROC4_CLNT_CB_RECALL
);
804 atomic_long_dec(&num_delegations
);
809 nfs4_put_stid(struct nfs4_stid
*s
)
811 struct nfs4_file
*fp
= s
->sc_file
;
812 struct nfs4_client
*clp
= s
->sc_client
;
814 might_lock(&clp
->cl_lock
);
816 if (!atomic_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
817 wake_up_all(&close_wq
);
820 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
821 spin_unlock(&clp
->cl_lock
);
828 nfs4_inc_and_copy_stateid(stateid_t
*dst
, struct nfs4_stid
*stid
)
830 stateid_t
*src
= &stid
->sc_stateid
;
832 spin_lock(&stid
->sc_lock
);
833 if (unlikely(++src
->si_generation
== 0))
834 src
->si_generation
= 1;
835 memcpy(dst
, src
, sizeof(*dst
));
836 spin_unlock(&stid
->sc_lock
);
839 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
841 struct file
*filp
= NULL
;
843 spin_lock(&fp
->fi_lock
);
844 if (fp
->fi_deleg_file
&& --fp
->fi_delegees
== 0)
845 swap(filp
, fp
->fi_deleg_file
);
846 spin_unlock(&fp
->fi_lock
);
849 vfs_setlease(filp
, F_UNLCK
, NULL
, (void **)&fp
);
854 void nfs4_unhash_stid(struct nfs4_stid
*s
)
860 * nfs4_get_existing_delegation - Discover if this delegation already exists
861 * @clp: a pointer to the nfs4_client we're granting a delegation to
862 * @fp: a pointer to the nfs4_file we're granting a delegation on
865 * On success: NULL if an existing delegation was not found.
867 * On error: -EAGAIN if one was previously granted to this nfs4_client
868 * for this nfs4_file.
873 nfs4_get_existing_delegation(struct nfs4_client
*clp
, struct nfs4_file
*fp
)
875 struct nfs4_delegation
*searchdp
= NULL
;
876 struct nfs4_client
*searchclp
= NULL
;
878 lockdep_assert_held(&state_lock
);
879 lockdep_assert_held(&fp
->fi_lock
);
881 list_for_each_entry(searchdp
, &fp
->fi_delegations
, dl_perfile
) {
882 searchclp
= searchdp
->dl_stid
.sc_client
;
883 if (clp
== searchclp
) {
891 * hash_delegation_locked - Add a delegation to the appropriate lists
892 * @dp: a pointer to the nfs4_delegation we are adding.
893 * @fp: a pointer to the nfs4_file we're granting a delegation on
896 * On success: NULL if the delegation was successfully hashed.
898 * On error: -EAGAIN if one was previously granted to this
899 * nfs4_client for this nfs4_file. Delegation is not hashed.
904 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
907 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
909 lockdep_assert_held(&state_lock
);
910 lockdep_assert_held(&fp
->fi_lock
);
912 status
= nfs4_get_existing_delegation(clp
, fp
);
916 atomic_inc(&dp
->dl_stid
.sc_count
);
917 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
918 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
919 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
924 unhash_delegation_locked(struct nfs4_delegation
*dp
)
926 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
928 lockdep_assert_held(&state_lock
);
930 if (list_empty(&dp
->dl_perfile
))
933 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
934 /* Ensure that deleg break won't try to requeue it */
936 spin_lock(&fp
->fi_lock
);
937 list_del_init(&dp
->dl_perclnt
);
938 list_del_init(&dp
->dl_recall_lru
);
939 list_del_init(&dp
->dl_perfile
);
940 spin_unlock(&fp
->fi_lock
);
944 static void destroy_delegation(struct nfs4_delegation
*dp
)
948 spin_lock(&state_lock
);
949 unhashed
= unhash_delegation_locked(dp
);
950 spin_unlock(&state_lock
);
952 put_clnt_odstate(dp
->dl_clnt_odstate
);
953 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
954 nfs4_put_stid(&dp
->dl_stid
);
958 static void revoke_delegation(struct nfs4_delegation
*dp
)
960 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
962 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
964 put_clnt_odstate(dp
->dl_clnt_odstate
);
965 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
967 if (clp
->cl_minorversion
== 0)
968 nfs4_put_stid(&dp
->dl_stid
);
970 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
971 spin_lock(&clp
->cl_lock
);
972 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
973 spin_unlock(&clp
->cl_lock
);
981 static unsigned int clientid_hashval(u32 id
)
983 return id
& CLIENT_HASH_MASK
;
986 static unsigned int clientstr_hashval(const char *name
)
988 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
992 * We store the NONE, READ, WRITE, and BOTH bits separately in the
993 * st_{access,deny}_bmap field of the stateid, in order to track not
994 * only what share bits are currently in force, but also what
995 * combinations of share bits previous opens have used. This allows us
996 * to enforce the recommendation of rfc 3530 14.2.19 that the server
997 * return an error if the client attempt to downgrade to a combination
998 * of share bits not explicable by closing some of its previous opens.
1000 * XXX: This enforcement is actually incomplete, since we don't keep
1001 * track of access/deny bit combinations; so, e.g., we allow:
1003 * OPEN allow read, deny write
1004 * OPEN allow both, deny none
1005 * DOWNGRADE allow read, deny none
1007 * which we should reject.
1010 bmap_to_share_mode(unsigned long bmap
) {
1012 unsigned int access
= 0;
1014 for (i
= 1; i
< 4; i
++) {
1015 if (test_bit(i
, &bmap
))
1021 /* set share access for a given stateid */
1023 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1025 unsigned char mask
= 1 << access
;
1027 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
1028 stp
->st_access_bmap
|= mask
;
1031 /* clear share access for a given stateid */
1033 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1035 unsigned char mask
= 1 << access
;
1037 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
1038 stp
->st_access_bmap
&= ~mask
;
1041 /* test whether a given stateid has access */
1043 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
1045 unsigned char mask
= 1 << access
;
1047 return (bool)(stp
->st_access_bmap
& mask
);
1050 /* set share deny for a given stateid */
1052 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1054 unsigned char mask
= 1 << deny
;
1056 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
1057 stp
->st_deny_bmap
|= mask
;
1060 /* clear share deny for a given stateid */
1062 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1064 unsigned char mask
= 1 << deny
;
1066 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
1067 stp
->st_deny_bmap
&= ~mask
;
1070 /* test whether a given stateid is denying specific access */
1072 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1074 unsigned char mask
= 1 << deny
;
1076 return (bool)(stp
->st_deny_bmap
& mask
);
1079 static int nfs4_access_to_omode(u32 access
)
1081 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
1082 case NFS4_SHARE_ACCESS_READ
:
1084 case NFS4_SHARE_ACCESS_WRITE
:
1086 case NFS4_SHARE_ACCESS_BOTH
:
1094 * A stateid that had a deny mode associated with it is being released
1095 * or downgraded. Recalculate the deny mode on the file.
1098 recalculate_deny_mode(struct nfs4_file
*fp
)
1100 struct nfs4_ol_stateid
*stp
;
1102 spin_lock(&fp
->fi_lock
);
1103 fp
->fi_share_deny
= 0;
1104 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
1105 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
1106 spin_unlock(&fp
->fi_lock
);
1110 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1113 bool change
= false;
1115 for (i
= 1; i
< 4; i
++) {
1116 if ((i
& deny
) != i
) {
1122 /* Recalculate per-file deny mode if there was a change */
1124 recalculate_deny_mode(stp
->st_stid
.sc_file
);
1127 /* release all access and file references for a given stateid */
1129 release_all_access(struct nfs4_ol_stateid
*stp
)
1132 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1134 if (fp
&& stp
->st_deny_bmap
!= 0)
1135 recalculate_deny_mode(fp
);
1137 for (i
= 1; i
< 4; i
++) {
1138 if (test_access(i
, stp
))
1139 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
1140 clear_access(i
, stp
);
1144 static inline void nfs4_free_stateowner(struct nfs4_stateowner
*sop
)
1146 kfree(sop
->so_owner
.data
);
1147 sop
->so_ops
->so_free(sop
);
1150 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
1152 struct nfs4_client
*clp
= sop
->so_client
;
1154 might_lock(&clp
->cl_lock
);
1156 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
1158 sop
->so_ops
->so_unhash(sop
);
1159 spin_unlock(&clp
->cl_lock
);
1160 nfs4_free_stateowner(sop
);
1163 static bool unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
1165 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1167 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
1169 if (list_empty(&stp
->st_perfile
))
1172 spin_lock(&fp
->fi_lock
);
1173 list_del_init(&stp
->st_perfile
);
1174 spin_unlock(&fp
->fi_lock
);
1175 list_del(&stp
->st_perstateowner
);
1179 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
1181 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1183 put_clnt_odstate(stp
->st_clnt_odstate
);
1184 release_all_access(stp
);
1185 if (stp
->st_stateowner
)
1186 nfs4_put_stateowner(stp
->st_stateowner
);
1187 kmem_cache_free(stateid_slab
, stid
);
1190 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
1192 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1193 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
1196 file
= find_any_file(stp
->st_stid
.sc_file
);
1198 filp_close(file
, (fl_owner_t
)lo
);
1199 nfs4_free_ol_stateid(stid
);
1203 * Put the persistent reference to an already unhashed generic stateid, while
1204 * holding the cl_lock. If it's the last reference, then put it onto the
1205 * reaplist for later destruction.
1207 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
1208 struct list_head
*reaplist
)
1210 struct nfs4_stid
*s
= &stp
->st_stid
;
1211 struct nfs4_client
*clp
= s
->sc_client
;
1213 lockdep_assert_held(&clp
->cl_lock
);
1215 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
1217 if (!atomic_dec_and_test(&s
->sc_count
)) {
1218 wake_up_all(&close_wq
);
1222 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
1223 list_add(&stp
->st_locks
, reaplist
);
1226 static bool unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
1228 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1230 list_del_init(&stp
->st_locks
);
1231 nfs4_unhash_stid(&stp
->st_stid
);
1232 return unhash_ol_stateid(stp
);
1235 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
1237 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
1240 spin_lock(&clp
->cl_lock
);
1241 unhashed
= unhash_lock_stateid(stp
);
1242 spin_unlock(&clp
->cl_lock
);
1244 nfs4_put_stid(&stp
->st_stid
);
1247 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1249 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1251 lockdep_assert_held(&clp
->cl_lock
);
1253 list_del_init(&lo
->lo_owner
.so_strhash
);
1257 * Free a list of generic stateids that were collected earlier after being
1261 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1263 struct nfs4_ol_stateid
*stp
;
1264 struct nfs4_file
*fp
;
1268 while (!list_empty(reaplist
)) {
1269 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1271 list_del(&stp
->st_locks
);
1272 fp
= stp
->st_stid
.sc_file
;
1273 stp
->st_stid
.sc_free(&stp
->st_stid
);
1279 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1280 struct list_head
*reaplist
)
1282 struct nfs4_ol_stateid
*stp
;
1284 lockdep_assert_held(&open_stp
->st_stid
.sc_client
->cl_lock
);
1286 while (!list_empty(&open_stp
->st_locks
)) {
1287 stp
= list_entry(open_stp
->st_locks
.next
,
1288 struct nfs4_ol_stateid
, st_locks
);
1289 WARN_ON(!unhash_lock_stateid(stp
));
1290 put_ol_stateid_locked(stp
, reaplist
);
1294 static bool unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1295 struct list_head
*reaplist
)
1299 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1301 unhashed
= unhash_ol_stateid(stp
);
1302 release_open_stateid_locks(stp
, reaplist
);
1306 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1308 LIST_HEAD(reaplist
);
1310 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1311 if (unhash_open_stateid(stp
, &reaplist
))
1312 put_ol_stateid_locked(stp
, &reaplist
);
1313 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1314 free_ol_stateid_reaplist(&reaplist
);
1317 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1319 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1321 lockdep_assert_held(&clp
->cl_lock
);
1323 list_del_init(&oo
->oo_owner
.so_strhash
);
1324 list_del_init(&oo
->oo_perclient
);
1327 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1329 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1331 struct nfs4_ol_stateid
*s
;
1333 spin_lock(&nn
->client_lock
);
1334 s
= oo
->oo_last_closed_stid
;
1336 list_del_init(&oo
->oo_close_lru
);
1337 oo
->oo_last_closed_stid
= NULL
;
1339 spin_unlock(&nn
->client_lock
);
1341 nfs4_put_stid(&s
->st_stid
);
1344 static void release_openowner(struct nfs4_openowner
*oo
)
1346 struct nfs4_ol_stateid
*stp
;
1347 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1348 struct list_head reaplist
;
1350 INIT_LIST_HEAD(&reaplist
);
1352 spin_lock(&clp
->cl_lock
);
1353 unhash_openowner_locked(oo
);
1354 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1355 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1356 struct nfs4_ol_stateid
, st_perstateowner
);
1357 if (unhash_open_stateid(stp
, &reaplist
))
1358 put_ol_stateid_locked(stp
, &reaplist
);
1360 spin_unlock(&clp
->cl_lock
);
1361 free_ol_stateid_reaplist(&reaplist
);
1362 release_last_closed_stateid(oo
);
1363 nfs4_put_stateowner(&oo
->oo_owner
);
1367 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1369 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1371 return sid
->sequence
% SESSION_HASH_SIZE
;
1374 #ifdef CONFIG_SUNRPC_DEBUG
1376 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1378 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1379 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1383 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1389 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1390 * won't be used for replay.
1392 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1394 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1396 if (nfserr
== nfserr_replay_me
)
1399 if (!seqid_mutating_err(ntohl(nfserr
))) {
1400 nfsd4_cstate_clear_replay(cstate
);
1405 if (so
->so_is_open_owner
)
1406 release_last_closed_stateid(openowner(so
));
1412 gen_sessionid(struct nfsd4_session
*ses
)
1414 struct nfs4_client
*clp
= ses
->se_client
;
1415 struct nfsd4_sessionid
*sid
;
1417 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1418 sid
->clientid
= clp
->cl_clientid
;
1419 sid
->sequence
= current_sessionid
++;
1424 * The protocol defines ca_maxresponssize_cached to include the size of
1425 * the rpc header, but all we need to cache is the data starting after
1426 * the end of the initial SEQUENCE operation--the rest we regenerate
1427 * each time. Therefore we can advertise a ca_maxresponssize_cached
1428 * value that is the number of bytes in our cache plus a few additional
1429 * bytes. In order to stay on the safe side, and not promise more than
1430 * we can cache, those additional bytes must be the minimum possible: 24
1431 * bytes of rpc header (xid through accept state, with AUTH_NULL
1432 * verifier), 12 for the compound header (with zero-length tag), and 44
1433 * for the SEQUENCE op response:
1435 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1438 free_session_slots(struct nfsd4_session
*ses
)
1442 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
1443 kfree(ses
->se_slots
[i
]);
1447 * We don't actually need to cache the rpc and session headers, so we
1448 * can allocate a little less for each slot:
1450 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1454 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1457 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1458 return size
+ sizeof(struct nfsd4_slot
);
1462 * XXX: If we run out of reserved DRC memory we could (up to a point)
1463 * re-negotiate active sessions and reduce their slot usage to make
1464 * room for new connections. For now we just fail the create session.
1466 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1468 u32 slotsize
= slot_bytes(ca
);
1469 u32 num
= ca
->maxreqs
;
1472 spin_lock(&nfsd_drc_lock
);
1473 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1474 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1475 num
= min_t(int, num
, avail
/ slotsize
);
1476 nfsd_drc_mem_used
+= num
* slotsize
;
1477 spin_unlock(&nfsd_drc_lock
);
1482 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1484 int slotsize
= slot_bytes(ca
);
1486 spin_lock(&nfsd_drc_lock
);
1487 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1488 spin_unlock(&nfsd_drc_lock
);
1491 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1492 struct nfsd4_channel_attrs
*battrs
)
1494 int numslots
= fattrs
->maxreqs
;
1495 int slotsize
= slot_bytes(fattrs
);
1496 struct nfsd4_session
*new;
1499 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1500 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1501 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1503 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1506 /* allocate each struct nfsd4_slot and data cache in one piece */
1507 for (i
= 0; i
< numslots
; i
++) {
1508 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1509 if (!new->se_slots
[i
])
1513 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1514 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1519 kfree(new->se_slots
[i
]);
1524 static void free_conn(struct nfsd4_conn
*c
)
1526 svc_xprt_put(c
->cn_xprt
);
1530 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1532 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1533 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1535 spin_lock(&clp
->cl_lock
);
1536 if (!list_empty(&c
->cn_persession
)) {
1537 list_del(&c
->cn_persession
);
1540 nfsd4_probe_callback(clp
);
1541 spin_unlock(&clp
->cl_lock
);
1544 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1546 struct nfsd4_conn
*conn
;
1548 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1551 svc_xprt_get(rqstp
->rq_xprt
);
1552 conn
->cn_xprt
= rqstp
->rq_xprt
;
1553 conn
->cn_flags
= flags
;
1554 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1558 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1560 conn
->cn_session
= ses
;
1561 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1564 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1566 struct nfs4_client
*clp
= ses
->se_client
;
1568 spin_lock(&clp
->cl_lock
);
1569 __nfsd4_hash_conn(conn
, ses
);
1570 spin_unlock(&clp
->cl_lock
);
1573 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1575 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1576 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1579 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1583 nfsd4_hash_conn(conn
, ses
);
1584 ret
= nfsd4_register_conn(conn
);
1586 /* oops; xprt is already down: */
1587 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1588 /* We may have gained or lost a callback channel: */
1589 nfsd4_probe_callback_sync(ses
->se_client
);
1592 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1594 u32 dir
= NFS4_CDFC4_FORE
;
1596 if (cses
->flags
& SESSION4_BACK_CHAN
)
1597 dir
|= NFS4_CDFC4_BACK
;
1598 return alloc_conn(rqstp
, dir
);
1601 /* must be called under client_lock */
1602 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1604 struct nfs4_client
*clp
= s
->se_client
;
1605 struct nfsd4_conn
*c
;
1607 spin_lock(&clp
->cl_lock
);
1608 while (!list_empty(&s
->se_conns
)) {
1609 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1610 list_del_init(&c
->cn_persession
);
1611 spin_unlock(&clp
->cl_lock
);
1613 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1616 spin_lock(&clp
->cl_lock
);
1618 spin_unlock(&clp
->cl_lock
);
1621 static void __free_session(struct nfsd4_session
*ses
)
1623 free_session_slots(ses
);
1627 static void free_session(struct nfsd4_session
*ses
)
1629 nfsd4_del_conns(ses
);
1630 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1631 __free_session(ses
);
1634 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1637 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1639 new->se_client
= clp
;
1642 INIT_LIST_HEAD(&new->se_conns
);
1644 new->se_cb_seq_nr
= 1;
1645 new->se_flags
= cses
->flags
;
1646 new->se_cb_prog
= cses
->callback_prog
;
1647 new->se_cb_sec
= cses
->cb_sec
;
1648 atomic_set(&new->se_ref
, 0);
1649 idx
= hash_sessionid(&new->se_sessionid
);
1650 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1651 spin_lock(&clp
->cl_lock
);
1652 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1653 spin_unlock(&clp
->cl_lock
);
1656 struct sockaddr
*sa
= svc_addr(rqstp
);
1658 * This is a little silly; with sessions there's no real
1659 * use for the callback address. Use the peer address
1660 * as a reasonable default for now, but consider fixing
1661 * the rpc client not to require an address in the
1664 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1665 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1669 /* caller must hold client_lock */
1670 static struct nfsd4_session
*
1671 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1673 struct nfsd4_session
*elem
;
1675 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1677 lockdep_assert_held(&nn
->client_lock
);
1679 dump_sessionid(__func__
, sessionid
);
1680 idx
= hash_sessionid(sessionid
);
1681 /* Search in the appropriate list */
1682 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1683 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1684 NFS4_MAX_SESSIONID_LEN
)) {
1689 dprintk("%s: session not found\n", __func__
);
1693 static struct nfsd4_session
*
1694 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1697 struct nfsd4_session
*session
;
1698 __be32 status
= nfserr_badsession
;
1700 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1703 status
= nfsd4_get_session_locked(session
);
1711 /* caller must hold client_lock */
1713 unhash_session(struct nfsd4_session
*ses
)
1715 struct nfs4_client
*clp
= ses
->se_client
;
1716 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1718 lockdep_assert_held(&nn
->client_lock
);
1720 list_del(&ses
->se_hash
);
1721 spin_lock(&ses
->se_client
->cl_lock
);
1722 list_del(&ses
->se_perclnt
);
1723 spin_unlock(&ses
->se_client
->cl_lock
);
1726 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1728 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1731 * We're assuming the clid was not given out from a boot
1732 * precisely 2^32 (about 136 years) before this one. That seems
1733 * a safe assumption:
1735 if (clid
->cl_boot
== (u32
)nn
->boot_time
)
1737 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1738 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1743 * XXX Should we use a slab cache ?
1744 * This type of memory management is somewhat inefficient, but we use it
1745 * anyway since SETCLIENTID is not a common operation.
1747 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1749 struct nfs4_client
*clp
;
1752 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1755 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1756 if (clp
->cl_name
.data
== NULL
)
1758 clp
->cl_ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
1759 OWNER_HASH_SIZE
, GFP_KERNEL
);
1760 if (!clp
->cl_ownerstr_hashtbl
)
1761 goto err_no_hashtbl
;
1762 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1763 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1764 clp
->cl_name
.len
= name
.len
;
1765 INIT_LIST_HEAD(&clp
->cl_sessions
);
1766 idr_init(&clp
->cl_stateids
);
1767 atomic_set(&clp
->cl_refcount
, 0);
1768 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1769 INIT_LIST_HEAD(&clp
->cl_idhash
);
1770 INIT_LIST_HEAD(&clp
->cl_openowners
);
1771 INIT_LIST_HEAD(&clp
->cl_delegations
);
1772 INIT_LIST_HEAD(&clp
->cl_lru
);
1773 INIT_LIST_HEAD(&clp
->cl_revoked
);
1774 #ifdef CONFIG_NFSD_PNFS
1775 INIT_LIST_HEAD(&clp
->cl_lo_states
);
1777 spin_lock_init(&clp
->cl_lock
);
1778 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1781 kfree(clp
->cl_name
.data
);
1788 free_client(struct nfs4_client
*clp
)
1790 while (!list_empty(&clp
->cl_sessions
)) {
1791 struct nfsd4_session
*ses
;
1792 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1794 list_del(&ses
->se_perclnt
);
1795 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1798 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1799 free_svc_cred(&clp
->cl_cred
);
1800 kfree(clp
->cl_ownerstr_hashtbl
);
1801 kfree(clp
->cl_name
.data
);
1802 idr_destroy(&clp
->cl_stateids
);
1806 /* must be called under the client_lock */
1808 unhash_client_locked(struct nfs4_client
*clp
)
1810 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1811 struct nfsd4_session
*ses
;
1813 lockdep_assert_held(&nn
->client_lock
);
1815 /* Mark the client as expired! */
1817 /* Make it invisible */
1818 if (!list_empty(&clp
->cl_idhash
)) {
1819 list_del_init(&clp
->cl_idhash
);
1820 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1821 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1823 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1825 list_del_init(&clp
->cl_lru
);
1826 spin_lock(&clp
->cl_lock
);
1827 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1828 list_del_init(&ses
->se_hash
);
1829 spin_unlock(&clp
->cl_lock
);
1833 unhash_client(struct nfs4_client
*clp
)
1835 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1837 spin_lock(&nn
->client_lock
);
1838 unhash_client_locked(clp
);
1839 spin_unlock(&nn
->client_lock
);
1842 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1844 if (atomic_read(&clp
->cl_refcount
))
1845 return nfserr_jukebox
;
1846 unhash_client_locked(clp
);
1851 __destroy_client(struct nfs4_client
*clp
)
1853 struct nfs4_openowner
*oo
;
1854 struct nfs4_delegation
*dp
;
1855 struct list_head reaplist
;
1857 INIT_LIST_HEAD(&reaplist
);
1858 spin_lock(&state_lock
);
1859 while (!list_empty(&clp
->cl_delegations
)) {
1860 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1861 WARN_ON(!unhash_delegation_locked(dp
));
1862 list_add(&dp
->dl_recall_lru
, &reaplist
);
1864 spin_unlock(&state_lock
);
1865 while (!list_empty(&reaplist
)) {
1866 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1867 list_del_init(&dp
->dl_recall_lru
);
1868 put_clnt_odstate(dp
->dl_clnt_odstate
);
1869 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
1870 nfs4_put_stid(&dp
->dl_stid
);
1872 while (!list_empty(&clp
->cl_revoked
)) {
1873 dp
= list_entry(clp
->cl_revoked
.next
, struct nfs4_delegation
, dl_recall_lru
);
1874 list_del_init(&dp
->dl_recall_lru
);
1875 nfs4_put_stid(&dp
->dl_stid
);
1877 while (!list_empty(&clp
->cl_openowners
)) {
1878 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1879 nfs4_get_stateowner(&oo
->oo_owner
);
1880 release_openowner(oo
);
1882 nfsd4_return_all_client_layouts(clp
);
1883 nfsd4_shutdown_callback(clp
);
1884 if (clp
->cl_cb_conn
.cb_xprt
)
1885 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1890 destroy_client(struct nfs4_client
*clp
)
1893 __destroy_client(clp
);
1896 static void expire_client(struct nfs4_client
*clp
)
1899 nfsd4_client_record_remove(clp
);
1900 __destroy_client(clp
);
1903 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1905 memcpy(target
->cl_verifier
.data
, source
->data
,
1906 sizeof(target
->cl_verifier
.data
));
1909 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1911 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1912 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1915 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1917 target
->cr_principal
= kstrdup(source
->cr_principal
, GFP_KERNEL
);
1918 target
->cr_raw_principal
= kstrdup(source
->cr_raw_principal
,
1920 if ((source
->cr_principal
&& ! target
->cr_principal
) ||
1921 (source
->cr_raw_principal
&& ! target
->cr_raw_principal
))
1924 target
->cr_flavor
= source
->cr_flavor
;
1925 target
->cr_uid
= source
->cr_uid
;
1926 target
->cr_gid
= source
->cr_gid
;
1927 target
->cr_group_info
= source
->cr_group_info
;
1928 get_group_info(target
->cr_group_info
);
1929 target
->cr_gss_mech
= source
->cr_gss_mech
;
1930 if (source
->cr_gss_mech
)
1931 gss_mech_get(source
->cr_gss_mech
);
1936 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1938 if (o1
->len
< o2
->len
)
1940 if (o1
->len
> o2
->len
)
1942 return memcmp(o1
->data
, o2
->data
, o1
->len
);
1945 static int same_name(const char *n1
, const char *n2
)
1947 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1951 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1953 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1957 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1959 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1962 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1966 if (g1
->ngroups
!= g2
->ngroups
)
1968 for (i
=0; i
<g1
->ngroups
; i
++)
1969 if (!gid_eq(g1
->gid
[i
], g2
->gid
[i
]))
1975 * RFC 3530 language requires clid_inuse be returned when the
1976 * "principal" associated with a requests differs from that previously
1977 * used. We use uid, gid's, and gss principal string as our best
1978 * approximation. We also don't want to allow non-gss use of a client
1979 * established using gss: in theory cr_principal should catch that
1980 * change, but in practice cr_principal can be null even in the gss case
1981 * since gssd doesn't always pass down a principal string.
1983 static bool is_gss_cred(struct svc_cred
*cr
)
1985 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1986 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1991 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1993 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1994 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1995 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1996 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1998 if (cr1
->cr_principal
== cr2
->cr_principal
)
2000 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
2002 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
2005 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
2007 struct svc_cred
*cr
= &rqstp
->rq_cred
;
2010 if (!cr
->cr_gss_mech
)
2012 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
2013 return service
== RPC_GSS_SVC_INTEGRITY
||
2014 service
== RPC_GSS_SVC_PRIVACY
;
2017 bool nfsd4_mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
2019 struct svc_cred
*cr
= &rqstp
->rq_cred
;
2021 if (!cl
->cl_mach_cred
)
2023 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
2025 if (!svc_rqst_integrity_protected(rqstp
))
2027 if (cl
->cl_cred
.cr_raw_principal
)
2028 return 0 == strcmp(cl
->cl_cred
.cr_raw_principal
,
2029 cr
->cr_raw_principal
);
2030 if (!cr
->cr_principal
)
2032 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
2035 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
2040 * This is opaque to client, so no need to byte-swap. Use
2041 * __force to keep sparse happy
2043 verf
[0] = (__force __be32
)get_seconds();
2044 verf
[1] = (__force __be32
)nn
->clverifier_counter
++;
2045 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
2048 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
2050 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
2051 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
2052 gen_confirm(clp
, nn
);
2055 static struct nfs4_stid
*
2056 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
2058 struct nfs4_stid
*ret
;
2060 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
2061 if (!ret
|| !ret
->sc_type
)
2066 static struct nfs4_stid
*
2067 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
2069 struct nfs4_stid
*s
;
2071 spin_lock(&cl
->cl_lock
);
2072 s
= find_stateid_locked(cl
, t
);
2074 if (typemask
& s
->sc_type
)
2075 atomic_inc(&s
->sc_count
);
2079 spin_unlock(&cl
->cl_lock
);
2083 static struct nfs4_client
*create_client(struct xdr_netobj name
,
2084 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
2086 struct nfs4_client
*clp
;
2087 struct sockaddr
*sa
= svc_addr(rqstp
);
2089 struct net
*net
= SVC_NET(rqstp
);
2091 clp
= alloc_client(name
);
2095 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
2100 nfsd4_init_cb(&clp
->cl_cb_null
, clp
, NULL
, NFSPROC4_CLNT_CB_NULL
);
2101 clp
->cl_time
= get_seconds();
2102 clear_bit(0, &clp
->cl_cb_slot_busy
);
2103 copy_verf(clp
, verf
);
2104 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
2105 clp
->cl_cb_session
= NULL
;
2111 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
2113 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
2114 struct nfs4_client
*clp
;
2117 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
2120 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
2121 new = &((*new)->rb_left
);
2123 new = &((*new)->rb_right
);
2126 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
2127 rb_insert_color(&new_clp
->cl_namenode
, root
);
2130 static struct nfs4_client
*
2131 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
2134 struct rb_node
*node
= root
->rb_node
;
2135 struct nfs4_client
*clp
;
2138 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
2139 cmp
= compare_blob(&clp
->cl_name
, name
);
2141 node
= node
->rb_left
;
2143 node
= node
->rb_right
;
2151 add_to_unconfirmed(struct nfs4_client
*clp
)
2153 unsigned int idhashval
;
2154 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2156 lockdep_assert_held(&nn
->client_lock
);
2158 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2159 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
2160 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2161 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
2162 renew_client_locked(clp
);
2166 move_to_confirmed(struct nfs4_client
*clp
)
2168 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2169 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2171 lockdep_assert_held(&nn
->client_lock
);
2173 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
2174 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
2175 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
2176 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
2177 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2178 renew_client_locked(clp
);
2181 static struct nfs4_client
*
2182 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
2184 struct nfs4_client
*clp
;
2185 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
2187 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
2188 if (same_clid(&clp
->cl_clientid
, clid
)) {
2189 if ((bool)clp
->cl_minorversion
!= sessions
)
2191 renew_client_locked(clp
);
2198 static struct nfs4_client
*
2199 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2201 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
2203 lockdep_assert_held(&nn
->client_lock
);
2204 return find_client_in_id_table(tbl
, clid
, sessions
);
2207 static struct nfs4_client
*
2208 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2210 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
2212 lockdep_assert_held(&nn
->client_lock
);
2213 return find_client_in_id_table(tbl
, clid
, sessions
);
2216 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
2218 return clp
->cl_exchange_flags
!= 0;
2221 static struct nfs4_client
*
2222 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2224 lockdep_assert_held(&nn
->client_lock
);
2225 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
2228 static struct nfs4_client
*
2229 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2231 lockdep_assert_held(&nn
->client_lock
);
2232 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2236 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2238 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2239 struct sockaddr
*sa
= svc_addr(rqstp
);
2240 u32 scopeid
= rpc_get_scope_id(sa
);
2241 unsigned short expected_family
;
2243 /* Currently, we only support tcp and tcp6 for the callback channel */
2244 if (se
->se_callback_netid_len
== 3 &&
2245 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2246 expected_family
= AF_INET
;
2247 else if (se
->se_callback_netid_len
== 4 &&
2248 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2249 expected_family
= AF_INET6
;
2253 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2254 se
->se_callback_addr_len
,
2255 (struct sockaddr
*)&conn
->cb_addr
,
2256 sizeof(conn
->cb_addr
));
2258 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2261 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2262 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2264 conn
->cb_prog
= se
->se_callback_prog
;
2265 conn
->cb_ident
= se
->se_callback_ident
;
2266 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2269 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2270 conn
->cb_addrlen
= 0;
2271 dprintk("NFSD: this client (clientid %08x/%08x) "
2272 "will not receive delegations\n",
2273 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2279 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2282 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2284 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2285 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2288 dprintk("--> %s slot %p\n", __func__
, slot
);
2290 slot
->sl_opcnt
= resp
->opcnt
;
2291 slot
->sl_status
= resp
->cstate
.status
;
2293 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2294 if (nfsd4_not_cached(resp
)) {
2295 slot
->sl_datalen
= 0;
2298 base
= resp
->cstate
.data_offset
;
2299 slot
->sl_datalen
= buf
->len
- base
;
2300 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2301 WARN(1, "%s: sessions DRC could not cache compound\n",
2307 * Encode the replay sequence operation from the slot values.
2308 * If cachethis is FALSE encode the uncached rep error on the next
2309 * operation which sets resp->p and increments resp->opcnt for
2310 * nfs4svc_encode_compoundres.
2314 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2315 struct nfsd4_compoundres
*resp
)
2317 struct nfsd4_op
*op
;
2318 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2320 /* Encode the replayed sequence operation */
2321 op
= &args
->ops
[resp
->opcnt
- 1];
2322 nfsd4_encode_operation(resp
, op
);
2324 /* Return nfserr_retry_uncached_rep in next operation. */
2325 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
2326 op
= &args
->ops
[resp
->opcnt
++];
2327 op
->status
= nfserr_retry_uncached_rep
;
2328 nfsd4_encode_operation(resp
, op
);
2334 * The sequence operation is not cached because we can use the slot and
2338 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2339 struct nfsd4_sequence
*seq
)
2341 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2342 struct xdr_stream
*xdr
= &resp
->xdr
;
2346 dprintk("--> %s slot %p\n", __func__
, slot
);
2348 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2352 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2355 return nfserr_serverfault
;
2357 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2358 xdr_commit_encode(xdr
);
2360 resp
->opcnt
= slot
->sl_opcnt
;
2361 return slot
->sl_status
;
2365 * Set the exchange_id flags returned by the server.
2368 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2370 #ifdef CONFIG_NFSD_PNFS
2371 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_PNFS_MDS
;
2373 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2376 /* Referrals are supported, Migration is not. */
2377 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2379 /* set the wire flags to return to client. */
2380 clid
->flags
= new->cl_exchange_flags
;
2383 static bool client_has_openowners(struct nfs4_client
*clp
)
2385 struct nfs4_openowner
*oo
;
2387 list_for_each_entry(oo
, &clp
->cl_openowners
, oo_perclient
) {
2388 if (!list_empty(&oo
->oo_owner
.so_stateids
))
2394 static bool client_has_state(struct nfs4_client
*clp
)
2396 return client_has_openowners(clp
)
2397 #ifdef CONFIG_NFSD_PNFS
2398 || !list_empty(&clp
->cl_lo_states
)
2400 || !list_empty(&clp
->cl_delegations
)
2401 || !list_empty(&clp
->cl_sessions
);
2405 nfsd4_exchange_id(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2406 union nfsd4_op_u
*u
)
2408 struct nfsd4_exchange_id
*exid
= &u
->exchange_id
;
2409 struct nfs4_client
*conf
, *new;
2410 struct nfs4_client
*unconf
= NULL
;
2412 char addr_str
[INET6_ADDRSTRLEN
];
2413 nfs4_verifier verf
= exid
->verifier
;
2414 struct sockaddr
*sa
= svc_addr(rqstp
);
2415 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2416 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2418 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2419 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2420 "ip_addr=%s flags %x, spa_how %d\n",
2421 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2422 addr_str
, exid
->flags
, exid
->spa_how
);
2424 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2425 return nfserr_inval
;
2427 new = create_client(exid
->clname
, rqstp
, &verf
);
2429 return nfserr_jukebox
;
2431 switch (exid
->spa_how
) {
2433 exid
->spo_must_enforce
[0] = 0;
2434 exid
->spo_must_enforce
[1] = (
2435 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
2436 1 << (OP_EXCHANGE_ID
- 32) |
2437 1 << (OP_CREATE_SESSION
- 32) |
2438 1 << (OP_DESTROY_SESSION
- 32) |
2439 1 << (OP_DESTROY_CLIENTID
- 32));
2441 exid
->spo_must_allow
[0] &= (1 << (OP_CLOSE
) |
2442 1 << (OP_OPEN_DOWNGRADE
) |
2444 1 << (OP_DELEGRETURN
));
2446 exid
->spo_must_allow
[1] &= (
2447 1 << (OP_TEST_STATEID
- 32) |
2448 1 << (OP_FREE_STATEID
- 32));
2449 if (!svc_rqst_integrity_protected(rqstp
)) {
2450 status
= nfserr_inval
;
2454 * Sometimes userspace doesn't give us a principal.
2455 * Which is a bug, really. Anyway, we can't enforce
2456 * MACH_CRED in that case, better to give up now:
2458 if (!new->cl_cred
.cr_principal
&&
2459 !new->cl_cred
.cr_raw_principal
) {
2460 status
= nfserr_serverfault
;
2463 new->cl_mach_cred
= true;
2466 default: /* checked by xdr code */
2469 status
= nfserr_encr_alg_unsupp
;
2473 /* Cases below refer to rfc 5661 section 18.35.4: */
2474 spin_lock(&nn
->client_lock
);
2475 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2477 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2478 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2481 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2482 status
= nfserr_inval
;
2485 if (!nfsd4_mach_creds_match(conf
, rqstp
)) {
2486 status
= nfserr_wrong_cred
;
2489 if (!creds_match
) { /* case 9 */
2490 status
= nfserr_perm
;
2493 if (!verfs_match
) { /* case 8 */
2494 status
= nfserr_not_same
;
2498 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2501 if (!creds_match
) { /* case 3 */
2502 if (client_has_state(conf
)) {
2503 status
= nfserr_clid_inuse
;
2508 if (verfs_match
) { /* case 2 */
2509 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2512 /* case 5, client reboot */
2517 if (update
) { /* case 7 */
2518 status
= nfserr_noent
;
2522 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2523 if (unconf
) /* case 4, possible retry or client restart */
2524 unhash_client_locked(unconf
);
2526 /* case 1 (normal case) */
2529 status
= mark_client_expired_locked(conf
);
2533 new->cl_minorversion
= cstate
->minorversion
;
2534 new->cl_spo_must_allow
.u
.words
[0] = exid
->spo_must_allow
[0];
2535 new->cl_spo_must_allow
.u
.words
[1] = exid
->spo_must_allow
[1];
2538 add_to_unconfirmed(new);
2541 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2542 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2544 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2545 nfsd4_set_ex_flags(conf
, exid
);
2547 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2548 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2552 spin_unlock(&nn
->client_lock
);
2557 expire_client(unconf
);
2562 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2564 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2567 /* The slot is in use, and no response has been sent. */
2569 if (seqid
== slot_seqid
)
2570 return nfserr_jukebox
;
2572 return nfserr_seq_misordered
;
2574 /* Note unsigned 32-bit arithmetic handles wraparound: */
2575 if (likely(seqid
== slot_seqid
+ 1))
2577 if (seqid
== slot_seqid
)
2578 return nfserr_replay_cache
;
2579 return nfserr_seq_misordered
;
2583 * Cache the create session result into the create session single DRC
2584 * slot cache by saving the xdr structure. sl_seqid has been set.
2585 * Do this for solo or embedded create session operations.
2588 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2589 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2591 slot
->sl_status
= nfserr
;
2592 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2596 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2597 struct nfsd4_clid_slot
*slot
)
2599 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2600 return slot
->sl_status
;
2603 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2604 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2605 1 + /* MIN tag is length with zero, only length */ \
2606 3 + /* version, opcount, opcode */ \
2607 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2608 /* seqid, slotID, slotID, cache */ \
2609 4 ) * sizeof(__be32))
2611 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2612 2 + /* verifier: AUTH_NULL, length 0 */\
2614 1 + /* MIN tag is length with zero, only length */ \
2615 3 + /* opcount, opcode, opstatus*/ \
2616 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2617 /* seqid, slotID, slotID, slotID, status */ \
2618 5 ) * sizeof(__be32))
2620 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2622 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2624 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2625 return nfserr_toosmall
;
2626 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2627 return nfserr_toosmall
;
2628 ca
->headerpadsz
= 0;
2629 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2630 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2631 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2632 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2633 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2634 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2636 * Note decreasing slot size below client's request may make it
2637 * difficult for client to function correctly, whereas
2638 * decreasing the number of slots will (just?) affect
2639 * performance. When short on memory we therefore prefer to
2640 * decrease number of slots instead of their size. Clients that
2641 * request larger slots than they need will get poor results:
2643 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2645 return nfserr_jukebox
;
2651 * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
2652 * These are based on similar macros in linux/sunrpc/msg_prot.h .
2654 #define RPC_MAX_HEADER_WITH_AUTH_SYS \
2655 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2657 #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2658 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2660 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2661 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
2662 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2663 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2666 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2668 ca
->headerpadsz
= 0;
2670 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2671 return nfserr_toosmall
;
2672 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2673 return nfserr_toosmall
;
2674 ca
->maxresp_cached
= 0;
2676 return nfserr_toosmall
;
2681 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2683 switch (cbs
->flavor
) {
2689 * GSS case: the spec doesn't allow us to return this
2690 * error. But it also doesn't allow us not to support
2692 * I'd rather this fail hard than return some error the
2693 * client might think it can already handle:
2695 return nfserr_encr_alg_unsupp
;
2700 nfsd4_create_session(struct svc_rqst
*rqstp
,
2701 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
2703 struct nfsd4_create_session
*cr_ses
= &u
->create_session
;
2704 struct sockaddr
*sa
= svc_addr(rqstp
);
2705 struct nfs4_client
*conf
, *unconf
;
2706 struct nfs4_client
*old
= NULL
;
2707 struct nfsd4_session
*new;
2708 struct nfsd4_conn
*conn
;
2709 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2711 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2713 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2714 return nfserr_inval
;
2715 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2718 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2721 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2723 goto out_release_drc_mem
;
2724 status
= nfserr_jukebox
;
2725 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2727 goto out_release_drc_mem
;
2728 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2730 goto out_free_session
;
2732 spin_lock(&nn
->client_lock
);
2733 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2734 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2735 WARN_ON_ONCE(conf
&& unconf
);
2738 status
= nfserr_wrong_cred
;
2739 if (!nfsd4_mach_creds_match(conf
, rqstp
))
2741 cs_slot
= &conf
->cl_cs_slot
;
2742 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2744 if (status
== nfserr_replay_cache
)
2745 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2748 } else if (unconf
) {
2749 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2750 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2751 status
= nfserr_clid_inuse
;
2754 status
= nfserr_wrong_cred
;
2755 if (!nfsd4_mach_creds_match(unconf
, rqstp
))
2757 cs_slot
= &unconf
->cl_cs_slot
;
2758 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2760 /* an unconfirmed replay returns misordered */
2761 status
= nfserr_seq_misordered
;
2764 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2766 status
= mark_client_expired_locked(old
);
2772 move_to_confirmed(unconf
);
2775 status
= nfserr_stale_clientid
;
2779 /* Persistent sessions are not supported */
2780 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2781 /* Upshifting from TCP to RDMA is not supported */
2782 cr_ses
->flags
&= ~SESSION4_RDMA
;
2784 init_session(rqstp
, new, conf
, cr_ses
);
2785 nfsd4_get_session_locked(new);
2787 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2788 NFS4_MAX_SESSIONID_LEN
);
2789 cs_slot
->sl_seqid
++;
2790 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2792 /* cache solo and embedded create sessions under the client_lock */
2793 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2794 spin_unlock(&nn
->client_lock
);
2795 /* init connection and backchannel */
2796 nfsd4_init_conn(rqstp
, conn
, new);
2797 nfsd4_put_session(new);
2802 spin_unlock(&nn
->client_lock
);
2807 __free_session(new);
2808 out_release_drc_mem
:
2809 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2813 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2816 case NFS4_CDFC4_FORE
:
2817 case NFS4_CDFC4_BACK
:
2819 case NFS4_CDFC4_FORE_OR_BOTH
:
2820 case NFS4_CDFC4_BACK_OR_BOTH
:
2821 *dir
= NFS4_CDFC4_BOTH
;
2824 return nfserr_inval
;
2827 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
,
2828 struct nfsd4_compound_state
*cstate
,
2829 union nfsd4_op_u
*u
)
2831 struct nfsd4_backchannel_ctl
*bc
= &u
->backchannel_ctl
;
2832 struct nfsd4_session
*session
= cstate
->session
;
2833 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2836 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2839 spin_lock(&nn
->client_lock
);
2840 session
->se_cb_prog
= bc
->bc_cb_program
;
2841 session
->se_cb_sec
= bc
->bc_cb_sec
;
2842 spin_unlock(&nn
->client_lock
);
2844 nfsd4_probe_callback(session
->se_client
);
2849 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2850 struct nfsd4_compound_state
*cstate
,
2851 union nfsd4_op_u
*u
)
2853 struct nfsd4_bind_conn_to_session
*bcts
= &u
->bind_conn_to_session
;
2855 struct nfsd4_conn
*conn
;
2856 struct nfsd4_session
*session
;
2857 struct net
*net
= SVC_NET(rqstp
);
2858 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2860 if (!nfsd4_last_compound_op(rqstp
))
2861 return nfserr_not_only_op
;
2862 spin_lock(&nn
->client_lock
);
2863 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2864 spin_unlock(&nn
->client_lock
);
2866 goto out_no_session
;
2867 status
= nfserr_wrong_cred
;
2868 if (!nfsd4_mach_creds_match(session
->se_client
, rqstp
))
2870 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2873 conn
= alloc_conn(rqstp
, bcts
->dir
);
2874 status
= nfserr_jukebox
;
2877 nfsd4_init_conn(rqstp
, conn
, session
);
2880 nfsd4_put_session(session
);
2885 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2889 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2893 nfsd4_destroy_session(struct svc_rqst
*r
, struct nfsd4_compound_state
*cstate
,
2894 union nfsd4_op_u
*u
)
2896 struct nfsd4_destroy_session
*sessionid
= &u
->destroy_session
;
2897 struct nfsd4_session
*ses
;
2899 int ref_held_by_me
= 0;
2900 struct net
*net
= SVC_NET(r
);
2901 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2903 status
= nfserr_not_only_op
;
2904 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2905 if (!nfsd4_last_compound_op(r
))
2909 dump_sessionid(__func__
, &sessionid
->sessionid
);
2910 spin_lock(&nn
->client_lock
);
2911 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2913 goto out_client_lock
;
2914 status
= nfserr_wrong_cred
;
2915 if (!nfsd4_mach_creds_match(ses
->se_client
, r
))
2916 goto out_put_session
;
2917 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2919 goto out_put_session
;
2920 unhash_session(ses
);
2921 spin_unlock(&nn
->client_lock
);
2923 nfsd4_probe_callback_sync(ses
->se_client
);
2925 spin_lock(&nn
->client_lock
);
2928 nfsd4_put_session_locked(ses
);
2930 spin_unlock(&nn
->client_lock
);
2935 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2937 struct nfsd4_conn
*c
;
2939 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2940 if (c
->cn_xprt
== xpt
) {
2947 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2949 struct nfs4_client
*clp
= ses
->se_client
;
2950 struct nfsd4_conn
*c
;
2951 __be32 status
= nfs_ok
;
2954 spin_lock(&clp
->cl_lock
);
2955 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2958 status
= nfserr_conn_not_bound_to_session
;
2959 if (clp
->cl_mach_cred
)
2961 __nfsd4_hash_conn(new, ses
);
2962 spin_unlock(&clp
->cl_lock
);
2963 ret
= nfsd4_register_conn(new);
2965 /* oops; xprt is already down: */
2966 nfsd4_conn_lost(&new->cn_xpt_user
);
2969 spin_unlock(&clp
->cl_lock
);
2974 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2976 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2978 return args
->opcnt
> session
->se_fchannel
.maxops
;
2981 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2982 struct nfsd4_session
*session
)
2984 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2986 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2990 nfsd4_sequence(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2991 union nfsd4_op_u
*u
)
2993 struct nfsd4_sequence
*seq
= &u
->sequence
;
2994 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2995 struct xdr_stream
*xdr
= &resp
->xdr
;
2996 struct nfsd4_session
*session
;
2997 struct nfs4_client
*clp
;
2998 struct nfsd4_slot
*slot
;
2999 struct nfsd4_conn
*conn
;
3002 struct net
*net
= SVC_NET(rqstp
);
3003 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3005 if (resp
->opcnt
!= 1)
3006 return nfserr_sequence_pos
;
3009 * Will be either used or freed by nfsd4_sequence_check_conn
3012 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
3014 return nfserr_jukebox
;
3016 spin_lock(&nn
->client_lock
);
3017 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
3019 goto out_no_session
;
3020 clp
= session
->se_client
;
3022 status
= nfserr_too_many_ops
;
3023 if (nfsd4_session_too_many_ops(rqstp
, session
))
3024 goto out_put_session
;
3026 status
= nfserr_req_too_big
;
3027 if (nfsd4_request_too_big(rqstp
, session
))
3028 goto out_put_session
;
3030 status
= nfserr_badslot
;
3031 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
3032 goto out_put_session
;
3034 slot
= session
->se_slots
[seq
->slotid
];
3035 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
3037 /* We do not negotiate the number of slots yet, so set the
3038 * maxslots to the session maxreqs which is used to encode
3039 * sr_highest_slotid and the sr_target_slot id to maxslots */
3040 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
3042 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
3043 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
3044 if (status
== nfserr_replay_cache
) {
3045 status
= nfserr_seq_misordered
;
3046 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
3047 goto out_put_session
;
3048 cstate
->slot
= slot
;
3049 cstate
->session
= session
;
3051 /* Return the cached reply status and set cstate->status
3052 * for nfsd4_proc_compound processing */
3053 status
= nfsd4_replay_cache_entry(resp
, seq
);
3054 cstate
->status
= nfserr_replay_cache
;
3058 goto out_put_session
;
3060 status
= nfsd4_sequence_check_conn(conn
, session
);
3063 goto out_put_session
;
3065 buflen
= (seq
->cachethis
) ?
3066 session
->se_fchannel
.maxresp_cached
:
3067 session
->se_fchannel
.maxresp_sz
;
3068 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
3070 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
3071 goto out_put_session
;
3072 svc_reserve(rqstp
, buflen
);
3075 /* Success! bump slot seqid */
3076 slot
->sl_seqid
= seq
->seqid
;
3077 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
3079 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
3081 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
3083 cstate
->slot
= slot
;
3084 cstate
->session
= session
;
3088 switch (clp
->cl_cb_state
) {
3090 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
3092 case NFSD4_CB_FAULT
:
3093 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
3096 seq
->status_flags
= 0;
3098 if (!list_empty(&clp
->cl_revoked
))
3099 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
3103 spin_unlock(&nn
->client_lock
);
3106 nfsd4_put_session_locked(session
);
3107 goto out_no_session
;
3111 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
3113 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3115 if (nfsd4_has_session(cs
)) {
3116 if (cs
->status
!= nfserr_replay_cache
) {
3117 nfsd4_store_cache_entry(resp
);
3118 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
3120 /* Drop session reference that was taken in nfsd4_sequence() */
3121 nfsd4_put_session(cs
->session
);
3123 put_client_renew(cs
->clp
);
3127 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
,
3128 struct nfsd4_compound_state
*cstate
,
3129 union nfsd4_op_u
*u
)
3131 struct nfsd4_destroy_clientid
*dc
= &u
->destroy_clientid
;
3132 struct nfs4_client
*conf
, *unconf
;
3133 struct nfs4_client
*clp
= NULL
;
3135 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3137 spin_lock(&nn
->client_lock
);
3138 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
3139 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
3140 WARN_ON_ONCE(conf
&& unconf
);
3143 if (client_has_state(conf
)) {
3144 status
= nfserr_clientid_busy
;
3147 status
= mark_client_expired_locked(conf
);
3154 status
= nfserr_stale_clientid
;
3157 if (!nfsd4_mach_creds_match(clp
, rqstp
)) {
3159 status
= nfserr_wrong_cred
;
3162 unhash_client_locked(clp
);
3164 spin_unlock(&nn
->client_lock
);
3171 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
,
3172 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
3174 struct nfsd4_reclaim_complete
*rc
= &u
->reclaim_complete
;
3177 if (rc
->rca_one_fs
) {
3178 if (!cstate
->current_fh
.fh_dentry
)
3179 return nfserr_nofilehandle
;
3181 * We don't take advantage of the rca_one_fs case.
3182 * That's OK, it's optional, we can safely ignore it.
3187 status
= nfserr_complete_already
;
3188 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
3189 &cstate
->session
->se_client
->cl_flags
))
3192 status
= nfserr_stale_clientid
;
3193 if (is_client_expired(cstate
->session
->se_client
))
3195 * The following error isn't really legal.
3196 * But we only get here if the client just explicitly
3197 * destroyed the client. Surely it no longer cares what
3198 * error it gets back on an operation for the dead
3204 nfsd4_client_record_create(cstate
->session
->se_client
);
3210 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3211 union nfsd4_op_u
*u
)
3213 struct nfsd4_setclientid
*setclid
= &u
->setclientid
;
3214 struct xdr_netobj clname
= setclid
->se_name
;
3215 nfs4_verifier clverifier
= setclid
->se_verf
;
3216 struct nfs4_client
*conf
, *new;
3217 struct nfs4_client
*unconf
= NULL
;
3219 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3221 new = create_client(clname
, rqstp
, &clverifier
);
3223 return nfserr_jukebox
;
3224 /* Cases below refer to rfc 3530 section 14.2.33: */
3225 spin_lock(&nn
->client_lock
);
3226 conf
= find_confirmed_client_by_name(&clname
, nn
);
3227 if (conf
&& client_has_state(conf
)) {
3229 status
= nfserr_clid_inuse
;
3230 if (clp_used_exchangeid(conf
))
3232 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
3233 char addr_str
[INET6_ADDRSTRLEN
];
3234 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
3236 dprintk("NFSD: setclientid: string in use by client "
3237 "at %s\n", addr_str
);
3241 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
3243 unhash_client_locked(unconf
);
3244 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
)) {
3245 /* case 1: probable callback update */
3246 copy_clid(new, conf
);
3247 gen_confirm(new, nn
);
3248 } else /* case 4 (new client) or cases 2, 3 (client reboot): */
3250 new->cl_minorversion
= 0;
3251 gen_callback(new, setclid
, rqstp
);
3252 add_to_unconfirmed(new);
3253 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
3254 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
3255 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
3259 spin_unlock(&nn
->client_lock
);
3263 expire_client(unconf
);
3269 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
3270 struct nfsd4_compound_state
*cstate
,
3271 union nfsd4_op_u
*u
)
3273 struct nfsd4_setclientid_confirm
*setclientid_confirm
=
3274 &u
->setclientid_confirm
;
3275 struct nfs4_client
*conf
, *unconf
;
3276 struct nfs4_client
*old
= NULL
;
3277 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
3278 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
3280 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3282 if (STALE_CLIENTID(clid
, nn
))
3283 return nfserr_stale_clientid
;
3285 spin_lock(&nn
->client_lock
);
3286 conf
= find_confirmed_client(clid
, false, nn
);
3287 unconf
= find_unconfirmed_client(clid
, false, nn
);
3289 * We try hard to give out unique clientid's, so if we get an
3290 * attempt to confirm the same clientid with a different cred,
3291 * the client may be buggy; this should never happen.
3293 * Nevertheless, RFC 7530 recommends INUSE for this case:
3295 status
= nfserr_clid_inuse
;
3296 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3298 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3300 /* cases below refer to rfc 3530 section 14.2.34: */
3301 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3302 if (conf
&& same_verf(&confirm
, &conf
->cl_confirm
)) {
3303 /* case 2: probable retransmit */
3305 } else /* case 4: client hasn't noticed we rebooted yet? */
3306 status
= nfserr_stale_clientid
;
3310 if (conf
) { /* case 1: callback update */
3312 unhash_client_locked(old
);
3313 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3314 } else { /* case 3: normal case; new or rebooted client */
3315 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3317 status
= nfserr_clid_inuse
;
3318 if (client_has_state(old
)
3319 && !same_creds(&unconf
->cl_cred
,
3322 status
= mark_client_expired_locked(old
);
3328 move_to_confirmed(unconf
);
3331 get_client_locked(conf
);
3332 spin_unlock(&nn
->client_lock
);
3333 nfsd4_probe_callback(conf
);
3334 spin_lock(&nn
->client_lock
);
3335 put_client_renew_locked(conf
);
3337 spin_unlock(&nn
->client_lock
);
3343 static struct nfs4_file
*nfsd4_alloc_file(void)
3345 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3348 /* OPEN Share state helper functions */
3349 static void nfsd4_init_file(struct knfsd_fh
*fh
, unsigned int hashval
,
3350 struct nfs4_file
*fp
)
3352 lockdep_assert_held(&state_lock
);
3354 atomic_set(&fp
->fi_ref
, 1);
3355 spin_lock_init(&fp
->fi_lock
);
3356 INIT_LIST_HEAD(&fp
->fi_stateids
);
3357 INIT_LIST_HEAD(&fp
->fi_delegations
);
3358 INIT_LIST_HEAD(&fp
->fi_clnt_odstate
);
3359 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3360 fp
->fi_deleg_file
= NULL
;
3361 fp
->fi_had_conflict
= false;
3362 fp
->fi_share_deny
= 0;
3363 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3364 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3365 #ifdef CONFIG_NFSD_PNFS
3366 INIT_LIST_HEAD(&fp
->fi_lo_states
);
3367 atomic_set(&fp
->fi_lo_recalls
, 0);
3369 hlist_add_head_rcu(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3373 nfsd4_free_slabs(void)
3375 kmem_cache_destroy(odstate_slab
);
3376 kmem_cache_destroy(openowner_slab
);
3377 kmem_cache_destroy(lockowner_slab
);
3378 kmem_cache_destroy(file_slab
);
3379 kmem_cache_destroy(stateid_slab
);
3380 kmem_cache_destroy(deleg_slab
);
3384 nfsd4_init_slabs(void)
3386 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3387 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3388 if (openowner_slab
== NULL
)
3390 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3391 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3392 if (lockowner_slab
== NULL
)
3393 goto out_free_openowner_slab
;
3394 file_slab
= kmem_cache_create("nfsd4_files",
3395 sizeof(struct nfs4_file
), 0, 0, NULL
);
3396 if (file_slab
== NULL
)
3397 goto out_free_lockowner_slab
;
3398 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3399 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3400 if (stateid_slab
== NULL
)
3401 goto out_free_file_slab
;
3402 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3403 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3404 if (deleg_slab
== NULL
)
3405 goto out_free_stateid_slab
;
3406 odstate_slab
= kmem_cache_create("nfsd4_odstate",
3407 sizeof(struct nfs4_clnt_odstate
), 0, 0, NULL
);
3408 if (odstate_slab
== NULL
)
3409 goto out_free_deleg_slab
;
3412 out_free_deleg_slab
:
3413 kmem_cache_destroy(deleg_slab
);
3414 out_free_stateid_slab
:
3415 kmem_cache_destroy(stateid_slab
);
3417 kmem_cache_destroy(file_slab
);
3418 out_free_lockowner_slab
:
3419 kmem_cache_destroy(lockowner_slab
);
3420 out_free_openowner_slab
:
3421 kmem_cache_destroy(openowner_slab
);
3423 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3427 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3429 rp
->rp_status
= nfserr_serverfault
;
3431 rp
->rp_buf
= rp
->rp_ibuf
;
3432 mutex_init(&rp
->rp_mutex
);
3435 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3436 struct nfs4_stateowner
*so
)
3438 if (!nfsd4_has_session(cstate
)) {
3439 mutex_lock(&so
->so_replay
.rp_mutex
);
3440 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3444 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3446 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3449 cstate
->replay_owner
= NULL
;
3450 mutex_unlock(&so
->so_replay
.rp_mutex
);
3451 nfs4_put_stateowner(so
);
3455 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3457 struct nfs4_stateowner
*sop
;
3459 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3463 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3464 if (!sop
->so_owner
.data
) {
3465 kmem_cache_free(slab
, sop
);
3468 sop
->so_owner
.len
= owner
->len
;
3470 INIT_LIST_HEAD(&sop
->so_stateids
);
3471 sop
->so_client
= clp
;
3472 init_nfs4_replay(&sop
->so_replay
);
3473 atomic_set(&sop
->so_count
, 1);
3477 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3479 lockdep_assert_held(&clp
->cl_lock
);
3481 list_add(&oo
->oo_owner
.so_strhash
,
3482 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3483 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3486 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3488 unhash_openowner_locked(openowner(so
));
3491 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3493 struct nfs4_openowner
*oo
= openowner(so
);
3495 kmem_cache_free(openowner_slab
, oo
);
3498 static const struct nfs4_stateowner_operations openowner_ops
= {
3499 .so_unhash
= nfs4_unhash_openowner
,
3500 .so_free
= nfs4_free_openowner
,
3503 static struct nfs4_ol_stateid
*
3504 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3506 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3507 struct nfs4_openowner
*oo
= open
->op_openowner
;
3509 lockdep_assert_held(&fp
->fi_lock
);
3511 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3512 /* ignore lock owners */
3513 if (local
->st_stateowner
->so_is_open_owner
== 0)
3515 if (local
->st_stateowner
== &oo
->oo_owner
) {
3517 atomic_inc(&ret
->st_stid
.sc_count
);
3524 static struct nfs4_openowner
*
3525 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3526 struct nfsd4_compound_state
*cstate
)
3528 struct nfs4_client
*clp
= cstate
->clp
;
3529 struct nfs4_openowner
*oo
, *ret
;
3531 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3534 oo
->oo_owner
.so_ops
= &openowner_ops
;
3535 oo
->oo_owner
.so_is_open_owner
= 1;
3536 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3538 if (nfsd4_has_session(cstate
))
3539 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3541 oo
->oo_last_closed_stid
= NULL
;
3542 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3543 spin_lock(&clp
->cl_lock
);
3544 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3546 hash_openowner(oo
, clp
, strhashval
);
3549 nfs4_free_stateowner(&oo
->oo_owner
);
3551 spin_unlock(&clp
->cl_lock
);
3555 static struct nfs4_ol_stateid
*
3556 init_open_stateid(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3559 struct nfs4_openowner
*oo
= open
->op_openowner
;
3560 struct nfs4_ol_stateid
*retstp
= NULL
;
3561 struct nfs4_ol_stateid
*stp
;
3564 /* We are moving these outside of the spinlocks to avoid the warnings */
3565 mutex_init(&stp
->st_mutex
);
3566 mutex_lock(&stp
->st_mutex
);
3568 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3569 spin_lock(&fp
->fi_lock
);
3571 retstp
= nfsd4_find_existing_open(fp
, open
);
3575 open
->op_stp
= NULL
;
3576 atomic_inc(&stp
->st_stid
.sc_count
);
3577 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3578 INIT_LIST_HEAD(&stp
->st_locks
);
3579 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3581 stp
->st_stid
.sc_file
= fp
;
3582 stp
->st_access_bmap
= 0;
3583 stp
->st_deny_bmap
= 0;
3584 stp
->st_openstp
= NULL
;
3585 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3586 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3589 spin_unlock(&fp
->fi_lock
);
3590 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3592 mutex_lock(&retstp
->st_mutex
);
3593 /* To keep mutex tracking happy */
3594 mutex_unlock(&stp
->st_mutex
);
3601 * In the 4.0 case we need to keep the owners around a little while to handle
3602 * CLOSE replay. We still do need to release any file access that is held by
3603 * them before returning however.
3606 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3608 struct nfs4_ol_stateid
*last
;
3609 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3610 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3613 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3616 * We know that we hold one reference via nfsd4_close, and another
3617 * "persistent" reference for the client. If the refcount is higher
3618 * than 2, then there are still calls in progress that are using this
3619 * stateid. We can't put the sc_file reference until they are finished.
3620 * Wait for the refcount to drop to 2. Since it has been unhashed,
3621 * there should be no danger of the refcount going back up again at
3624 wait_event(close_wq
, atomic_read(&s
->st_stid
.sc_count
) == 2);
3626 release_all_access(s
);
3627 if (s
->st_stid
.sc_file
) {
3628 put_nfs4_file(s
->st_stid
.sc_file
);
3629 s
->st_stid
.sc_file
= NULL
;
3632 spin_lock(&nn
->client_lock
);
3633 last
= oo
->oo_last_closed_stid
;
3634 oo
->oo_last_closed_stid
= s
;
3635 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3636 oo
->oo_time
= get_seconds();
3637 spin_unlock(&nn
->client_lock
);
3639 nfs4_put_stid(&last
->st_stid
);
3642 /* search file_hashtbl[] for file */
3643 static struct nfs4_file
*
3644 find_file_locked(struct knfsd_fh
*fh
, unsigned int hashval
)
3646 struct nfs4_file
*fp
;
3648 hlist_for_each_entry_rcu(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3649 if (fh_match(&fp
->fi_fhandle
, fh
)) {
3650 if (atomic_inc_not_zero(&fp
->fi_ref
))
3658 find_file(struct knfsd_fh
*fh
)
3660 struct nfs4_file
*fp
;
3661 unsigned int hashval
= file_hashval(fh
);
3664 fp
= find_file_locked(fh
, hashval
);
3669 static struct nfs4_file
*
3670 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3672 struct nfs4_file
*fp
;
3673 unsigned int hashval
= file_hashval(fh
);
3676 fp
= find_file_locked(fh
, hashval
);
3681 spin_lock(&state_lock
);
3682 fp
= find_file_locked(fh
, hashval
);
3683 if (likely(fp
== NULL
)) {
3684 nfsd4_init_file(fh
, hashval
, new);
3687 spin_unlock(&state_lock
);
3693 * Called to check deny when READ with all zero stateid or
3694 * WRITE with all zero or all one stateid
3697 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3699 struct nfs4_file
*fp
;
3700 __be32 ret
= nfs_ok
;
3702 fp
= find_file(¤t_fh
->fh_handle
);
3705 /* Check for conflicting share reservations */
3706 spin_lock(&fp
->fi_lock
);
3707 if (fp
->fi_share_deny
& deny_type
)
3708 ret
= nfserr_locked
;
3709 spin_unlock(&fp
->fi_lock
);
3714 static void nfsd4_cb_recall_prepare(struct nfsd4_callback
*cb
)
3716 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3717 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3720 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3723 * We can't do this in nfsd_break_deleg_cb because it is
3724 * already holding inode->i_lock.
3726 * If the dl_time != 0, then we know that it has already been
3727 * queued for a lease break. Don't queue it again.
3729 spin_lock(&state_lock
);
3730 if (dp
->dl_time
== 0) {
3731 dp
->dl_time
= get_seconds();
3732 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3734 spin_unlock(&state_lock
);
3737 static int nfsd4_cb_recall_done(struct nfsd4_callback
*cb
,
3738 struct rpc_task
*task
)
3740 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3742 if (dp
->dl_stid
.sc_type
== NFS4_CLOSED_DELEG_STID
)
3745 switch (task
->tk_status
) {
3749 case -NFS4ERR_BAD_STATEID
:
3751 * Race: client probably got cb_recall before open reply
3752 * granting delegation.
3754 if (dp
->dl_retries
--) {
3755 rpc_delay(task
, 2 * HZ
);
3764 static void nfsd4_cb_recall_release(struct nfsd4_callback
*cb
)
3766 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3768 nfs4_put_stid(&dp
->dl_stid
);
3771 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
= {
3772 .prepare
= nfsd4_cb_recall_prepare
,
3773 .done
= nfsd4_cb_recall_done
,
3774 .release
= nfsd4_cb_recall_release
,
3777 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3780 * We're assuming the state code never drops its reference
3781 * without first removing the lease. Since we're in this lease
3782 * callback (and since the lease code is serialized by the kernel
3783 * lock) we know the server hasn't removed the lease yet, we know
3784 * it's safe to take a reference.
3786 atomic_inc(&dp
->dl_stid
.sc_count
);
3787 nfsd4_run_cb(&dp
->dl_recall
);
3790 /* Called from break_lease() with i_lock held. */
3792 nfsd_break_deleg_cb(struct file_lock
*fl
)
3795 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
3796 struct nfs4_delegation
*dp
;
3799 WARN(1, "(%p)->fl_owner NULL\n", fl
);
3802 if (fp
->fi_had_conflict
) {
3803 WARN(1, "duplicate break on %p\n", fp
);
3807 * We don't want the locks code to timeout the lease for us;
3808 * we'll remove it ourself if a delegation isn't returned
3811 fl
->fl_break_time
= 0;
3813 spin_lock(&fp
->fi_lock
);
3814 fp
->fi_had_conflict
= true;
3816 * If there are no delegations on the list, then return true
3817 * so that the lease code will go ahead and delete it.
3819 if (list_empty(&fp
->fi_delegations
))
3822 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
3823 nfsd_break_one_deleg(dp
);
3824 spin_unlock(&fp
->fi_lock
);
3829 nfsd_change_deleg_cb(struct file_lock
*onlist
, int arg
,
3830 struct list_head
*dispose
)
3833 return lease_modify(onlist
, arg
, dispose
);
3838 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3839 .lm_break
= nfsd_break_deleg_cb
,
3840 .lm_change
= nfsd_change_deleg_cb
,
3843 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3845 if (nfsd4_has_session(cstate
))
3847 if (seqid
== so
->so_seqid
- 1)
3848 return nfserr_replay_me
;
3849 if (seqid
== so
->so_seqid
)
3851 return nfserr_bad_seqid
;
3854 static __be32
lookup_clientid(clientid_t
*clid
,
3855 struct nfsd4_compound_state
*cstate
,
3856 struct nfsd_net
*nn
)
3858 struct nfs4_client
*found
;
3861 found
= cstate
->clp
;
3862 if (!same_clid(&found
->cl_clientid
, clid
))
3863 return nfserr_stale_clientid
;
3867 if (STALE_CLIENTID(clid
, nn
))
3868 return nfserr_stale_clientid
;
3871 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3872 * cached already then we know this is for is for v4.0 and "sessions"
3875 WARN_ON_ONCE(cstate
->session
);
3876 spin_lock(&nn
->client_lock
);
3877 found
= find_confirmed_client(clid
, false, nn
);
3879 spin_unlock(&nn
->client_lock
);
3880 return nfserr_expired
;
3882 atomic_inc(&found
->cl_refcount
);
3883 spin_unlock(&nn
->client_lock
);
3885 /* Cache the nfs4_client in cstate! */
3886 cstate
->clp
= found
;
3891 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3892 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3894 clientid_t
*clientid
= &open
->op_clientid
;
3895 struct nfs4_client
*clp
= NULL
;
3896 unsigned int strhashval
;
3897 struct nfs4_openowner
*oo
= NULL
;
3900 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3901 return nfserr_stale_clientid
;
3903 * In case we need it later, after we've already created the
3904 * file and don't want to risk a further failure:
3906 open
->op_file
= nfsd4_alloc_file();
3907 if (open
->op_file
== NULL
)
3908 return nfserr_jukebox
;
3910 status
= lookup_clientid(clientid
, cstate
, nn
);
3915 strhashval
= ownerstr_hashval(&open
->op_owner
);
3916 oo
= find_openstateowner_str(strhashval
, open
, clp
);
3917 open
->op_openowner
= oo
;
3921 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3922 /* Replace unconfirmed owners without checking for replay. */
3923 release_openowner(oo
);
3924 open
->op_openowner
= NULL
;
3927 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3932 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3934 return nfserr_jukebox
;
3935 open
->op_openowner
= oo
;
3937 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
3939 return nfserr_jukebox
;
3941 if (nfsd4_has_session(cstate
) &&
3942 (cstate
->current_fh
.fh_export
->ex_flags
& NFSEXP_PNFS
)) {
3943 open
->op_odstate
= alloc_clnt_odstate(clp
);
3944 if (!open
->op_odstate
)
3945 return nfserr_jukebox
;
3951 static inline __be32
3952 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3954 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3955 return nfserr_openmode
;
3960 static int share_access_to_flags(u32 share_access
)
3962 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3965 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3967 struct nfs4_stid
*ret
;
3969 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3972 return delegstateid(ret
);
3975 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3977 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3978 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3982 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3983 struct nfs4_delegation
**dp
)
3986 __be32 status
= nfserr_bad_stateid
;
3987 struct nfs4_delegation
*deleg
;
3989 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3992 flags
= share_access_to_flags(open
->op_share_access
);
3993 status
= nfs4_check_delegmode(deleg
, flags
);
3995 nfs4_put_stid(&deleg
->dl_stid
);
4000 if (!nfsd4_is_deleg_cur(open
))
4004 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
4008 static inline int nfs4_access_to_access(u32 nfs4_access
)
4012 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
4013 flags
|= NFSD_MAY_READ
;
4014 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
4015 flags
|= NFSD_MAY_WRITE
;
4019 static inline __be32
4020 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
4021 struct nfsd4_open
*open
)
4023 struct iattr iattr
= {
4024 .ia_valid
= ATTR_SIZE
,
4027 if (!open
->op_truncate
)
4029 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
4030 return nfserr_inval
;
4031 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
4034 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
4035 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
4036 struct nfsd4_open
*open
)
4038 struct file
*filp
= NULL
;
4040 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
4041 int access
= nfs4_access_to_access(open
->op_share_access
);
4042 unsigned char old_access_bmap
, old_deny_bmap
;
4044 spin_lock(&fp
->fi_lock
);
4047 * Are we trying to set a deny mode that would conflict with
4050 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
4051 if (status
!= nfs_ok
) {
4052 spin_unlock(&fp
->fi_lock
);
4056 /* set access to the file */
4057 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
4058 if (status
!= nfs_ok
) {
4059 spin_unlock(&fp
->fi_lock
);
4063 /* Set access bits in stateid */
4064 old_access_bmap
= stp
->st_access_bmap
;
4065 set_access(open
->op_share_access
, stp
);
4067 /* Set new deny mask */
4068 old_deny_bmap
= stp
->st_deny_bmap
;
4069 set_deny(open
->op_share_deny
, stp
);
4070 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
4072 if (!fp
->fi_fds
[oflag
]) {
4073 spin_unlock(&fp
->fi_lock
);
4074 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
4076 goto out_put_access
;
4077 spin_lock(&fp
->fi_lock
);
4078 if (!fp
->fi_fds
[oflag
]) {
4079 fp
->fi_fds
[oflag
] = filp
;
4083 spin_unlock(&fp
->fi_lock
);
4087 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4089 goto out_put_access
;
4093 stp
->st_access_bmap
= old_access_bmap
;
4094 nfs4_file_put_access(fp
, open
->op_share_access
);
4095 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
4100 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
4103 unsigned char old_deny_bmap
= stp
->st_deny_bmap
;
4105 if (!test_access(open
->op_share_access
, stp
))
4106 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
4108 /* test and set deny mode */
4109 spin_lock(&fp
->fi_lock
);
4110 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
4111 if (status
== nfs_ok
) {
4112 set_deny(open
->op_share_deny
, stp
);
4113 fp
->fi_share_deny
|=
4114 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
4116 spin_unlock(&fp
->fi_lock
);
4118 if (status
!= nfs_ok
)
4121 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4122 if (status
!= nfs_ok
)
4123 reset_union_bmap_deny(old_deny_bmap
, stp
);
4127 /* Should we give out recallable state?: */
4128 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
4130 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
4133 * In the sessions case, since we don't have to establish a
4134 * separate connection for callbacks, we assume it's OK
4135 * until we hear otherwise:
4137 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
4140 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_file
*fp
, int flag
)
4142 struct file_lock
*fl
;
4144 fl
= locks_alloc_lock();
4147 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
4148 fl
->fl_flags
= FL_DELEG
;
4149 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
4150 fl
->fl_end
= OFFSET_MAX
;
4151 fl
->fl_owner
= (fl_owner_t
)fp
;
4152 fl
->fl_pid
= current
->tgid
;
4157 * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer
4158 * @dp: a pointer to the nfs4_delegation we're adding.
4161 * On success: Return code will be 0 on success.
4163 * On error: -EAGAIN if there was an existing delegation.
4164 * nonzero if there is an error in other cases.
4168 static int nfs4_setlease(struct nfs4_delegation
*dp
)
4170 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
4171 struct file_lock
*fl
;
4175 fl
= nfs4_alloc_init_lease(fp
, NFS4_OPEN_DELEGATE_READ
);
4178 filp
= find_readable_file(fp
);
4180 /* We should always have a readable file here */
4182 locks_free_lock(fl
);
4186 status
= vfs_setlease(filp
, fl
->fl_type
, &fl
, NULL
);
4188 locks_free_lock(fl
);
4191 spin_lock(&state_lock
);
4192 spin_lock(&fp
->fi_lock
);
4193 /* Did the lease get broken before we took the lock? */
4195 if (fp
->fi_had_conflict
)
4198 if (fp
->fi_deleg_file
) {
4199 status
= hash_delegation_locked(dp
, fp
);
4202 fp
->fi_deleg_file
= filp
;
4203 fp
->fi_delegees
= 0;
4204 status
= hash_delegation_locked(dp
, fp
);
4205 spin_unlock(&fp
->fi_lock
);
4206 spin_unlock(&state_lock
);
4208 /* Should never happen, this is a new fi_deleg_file */
4214 spin_unlock(&fp
->fi_lock
);
4215 spin_unlock(&state_lock
);
4221 static struct nfs4_delegation
*
4222 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
4223 struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*odstate
)
4226 struct nfs4_delegation
*dp
;
4228 if (fp
->fi_had_conflict
)
4229 return ERR_PTR(-EAGAIN
);
4231 spin_lock(&state_lock
);
4232 spin_lock(&fp
->fi_lock
);
4233 status
= nfs4_get_existing_delegation(clp
, fp
);
4234 spin_unlock(&fp
->fi_lock
);
4235 spin_unlock(&state_lock
);
4238 return ERR_PTR(status
);
4240 dp
= alloc_init_deleg(clp
, fh
, odstate
);
4242 return ERR_PTR(-ENOMEM
);
4245 spin_lock(&state_lock
);
4246 spin_lock(&fp
->fi_lock
);
4247 dp
->dl_stid
.sc_file
= fp
;
4248 if (!fp
->fi_deleg_file
) {
4249 spin_unlock(&fp
->fi_lock
);
4250 spin_unlock(&state_lock
);
4251 status
= nfs4_setlease(dp
);
4254 if (fp
->fi_had_conflict
) {
4258 status
= hash_delegation_locked(dp
, fp
);
4260 spin_unlock(&fp
->fi_lock
);
4261 spin_unlock(&state_lock
);
4264 put_clnt_odstate(dp
->dl_clnt_odstate
);
4265 nfs4_put_stid(&dp
->dl_stid
);
4266 return ERR_PTR(status
);
4271 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
4273 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4274 if (status
== -EAGAIN
)
4275 open
->op_why_no_deleg
= WND4_CONTENTION
;
4277 open
->op_why_no_deleg
= WND4_RESOURCE
;
4278 switch (open
->op_deleg_want
) {
4279 case NFS4_SHARE_WANT_READ_DELEG
:
4280 case NFS4_SHARE_WANT_WRITE_DELEG
:
4281 case NFS4_SHARE_WANT_ANY_DELEG
:
4283 case NFS4_SHARE_WANT_CANCEL
:
4284 open
->op_why_no_deleg
= WND4_CANCELLED
;
4286 case NFS4_SHARE_WANT_NO_DELEG
:
4293 * Attempt to hand out a delegation.
4295 * Note we don't support write delegations, and won't until the vfs has
4296 * proper support for them.
4299 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
4300 struct nfs4_ol_stateid
*stp
)
4302 struct nfs4_delegation
*dp
;
4303 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
4304 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
4308 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
4309 open
->op_recall
= 0;
4310 switch (open
->op_claim_type
) {
4311 case NFS4_OPEN_CLAIM_PREVIOUS
:
4313 open
->op_recall
= 1;
4314 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
4317 case NFS4_OPEN_CLAIM_NULL
:
4318 case NFS4_OPEN_CLAIM_FH
:
4320 * Let's not give out any delegations till everyone's
4321 * had the chance to reclaim theirs, *and* until
4322 * NLM locks have all been reclaimed:
4324 if (locks_in_grace(clp
->net
))
4326 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
4329 * Also, if the file was opened for write or
4330 * create, there's a good chance the client's
4331 * about to write to it, resulting in an
4332 * immediate recall (since we don't support
4333 * write delegations):
4335 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
4337 if (open
->op_create
== NFS4_OPEN_CREATE
)
4343 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
, stp
->st_clnt_odstate
);
4347 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
4349 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
4350 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
4351 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
4352 nfs4_put_stid(&dp
->dl_stid
);
4355 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
4356 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
4357 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
4358 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4359 open
->op_recall
= 1;
4362 /* 4.1 client asking for a delegation? */
4363 if (open
->op_deleg_want
)
4364 nfsd4_open_deleg_none_ext(open
, status
);
4368 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
4369 struct nfs4_delegation
*dp
)
4371 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
4372 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4373 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4374 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
4375 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
4376 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4377 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4378 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
4380 /* Otherwise the client must be confused wanting a delegation
4381 * it already has, therefore we don't return
4382 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4387 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
4389 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
4390 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
4391 struct nfs4_file
*fp
= NULL
;
4392 struct nfs4_ol_stateid
*stp
= NULL
;
4393 struct nfs4_delegation
*dp
= NULL
;
4397 * Lookup file; if found, lookup stateid and check open request,
4398 * and check for delegations in the process of being recalled.
4399 * If not found, create the nfs4_file struct
4401 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4402 if (fp
!= open
->op_file
) {
4403 status
= nfs4_check_deleg(cl
, open
, &dp
);
4406 spin_lock(&fp
->fi_lock
);
4407 stp
= nfsd4_find_existing_open(fp
, open
);
4408 spin_unlock(&fp
->fi_lock
);
4410 open
->op_file
= NULL
;
4411 status
= nfserr_bad_stateid
;
4412 if (nfsd4_is_deleg_cur(open
))
4417 * OPEN the file, or upgrade an existing OPEN.
4418 * If truncate fails, the OPEN fails.
4421 /* Stateid was found, this is an OPEN upgrade */
4422 mutex_lock(&stp
->st_mutex
);
4423 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4425 mutex_unlock(&stp
->st_mutex
);
4429 /* stp is returned locked. */
4430 stp
= init_open_stateid(fp
, open
);
4431 /* See if we lost the race to some other thread */
4432 if (stp
->st_access_bmap
!= 0) {
4433 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
,
4436 mutex_unlock(&stp
->st_mutex
);
4441 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4443 mutex_unlock(&stp
->st_mutex
);
4444 release_open_stateid(stp
);
4448 stp
->st_clnt_odstate
= find_or_hash_clnt_odstate(fp
,
4450 if (stp
->st_clnt_odstate
== open
->op_odstate
)
4451 open
->op_odstate
= NULL
;
4454 nfs4_inc_and_copy_stateid(&open
->op_stateid
, &stp
->st_stid
);
4455 mutex_unlock(&stp
->st_mutex
);
4457 if (nfsd4_has_session(&resp
->cstate
)) {
4458 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4459 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4460 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4466 * Attempt to hand out a delegation. No error return, because the
4467 * OPEN succeeds even if we fail.
4469 nfs4_open_delegation(current_fh
, open
, stp
);
4473 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4474 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4476 /* 4.1 client trying to upgrade/downgrade delegation? */
4477 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4478 open
->op_deleg_want
)
4479 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4483 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4484 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
4486 * To finish the open response, we just need to set the rflags.
4488 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4489 if (nfsd4_has_session(&resp
->cstate
))
4490 open
->op_rflags
|= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK
;
4491 else if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
))
4492 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4495 nfs4_put_stid(&dp
->dl_stid
);
4497 nfs4_put_stid(&stp
->st_stid
);
4502 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4503 struct nfsd4_open
*open
)
4505 if (open
->op_openowner
) {
4506 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4508 nfsd4_cstate_assign_replay(cstate
, so
);
4509 nfs4_put_stateowner(so
);
4512 kmem_cache_free(file_slab
, open
->op_file
);
4514 nfs4_put_stid(&open
->op_stp
->st_stid
);
4515 if (open
->op_odstate
)
4516 kmem_cache_free(odstate_slab
, open
->op_odstate
);
4520 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4521 union nfsd4_op_u
*u
)
4523 clientid_t
*clid
= &u
->renew
;
4524 struct nfs4_client
*clp
;
4526 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4528 dprintk("process_renew(%08x/%08x): starting\n",
4529 clid
->cl_boot
, clid
->cl_id
);
4530 status
= lookup_clientid(clid
, cstate
, nn
);
4534 status
= nfserr_cb_path_down
;
4535 if (!list_empty(&clp
->cl_delegations
)
4536 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4544 nfsd4_end_grace(struct nfsd_net
*nn
)
4546 /* do nothing if grace period already ended */
4547 if (nn
->grace_ended
)
4550 dprintk("NFSD: end of grace period\n");
4551 nn
->grace_ended
= true;
4553 * If the server goes down again right now, an NFSv4
4554 * client will still be allowed to reclaim after it comes back up,
4555 * even if it hasn't yet had a chance to reclaim state this time.
4558 nfsd4_record_grace_done(nn
);
4560 * At this point, NFSv4 clients can still reclaim. But if the
4561 * server crashes, any that have not yet reclaimed will be out
4562 * of luck on the next boot.
4564 * (NFSv4.1+ clients are considered to have reclaimed once they
4565 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4566 * have reclaimed after their first OPEN.)
4568 locks_end_grace(&nn
->nfsd4_manager
);
4570 * At this point, and once lockd and/or any other containers
4571 * exit their grace period, further reclaims will fail and
4572 * regular locking can resume.
4577 nfs4_laundromat(struct nfsd_net
*nn
)
4579 struct nfs4_client
*clp
;
4580 struct nfs4_openowner
*oo
;
4581 struct nfs4_delegation
*dp
;
4582 struct nfs4_ol_stateid
*stp
;
4583 struct nfsd4_blocked_lock
*nbl
;
4584 struct list_head
*pos
, *next
, reaplist
;
4585 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4586 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4588 dprintk("NFSD: laundromat service - starting\n");
4589 nfsd4_end_grace(nn
);
4590 INIT_LIST_HEAD(&reaplist
);
4591 spin_lock(&nn
->client_lock
);
4592 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4593 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4594 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4595 t
= clp
->cl_time
- cutoff
;
4596 new_timeo
= min(new_timeo
, t
);
4599 if (mark_client_expired_locked(clp
)) {
4600 dprintk("NFSD: client in use (clientid %08x)\n",
4601 clp
->cl_clientid
.cl_id
);
4604 list_add(&clp
->cl_lru
, &reaplist
);
4606 spin_unlock(&nn
->client_lock
);
4607 list_for_each_safe(pos
, next
, &reaplist
) {
4608 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4609 dprintk("NFSD: purging unused client (clientid %08x)\n",
4610 clp
->cl_clientid
.cl_id
);
4611 list_del_init(&clp
->cl_lru
);
4614 spin_lock(&state_lock
);
4615 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4616 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4617 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4618 t
= dp
->dl_time
- cutoff
;
4619 new_timeo
= min(new_timeo
, t
);
4622 WARN_ON(!unhash_delegation_locked(dp
));
4623 list_add(&dp
->dl_recall_lru
, &reaplist
);
4625 spin_unlock(&state_lock
);
4626 while (!list_empty(&reaplist
)) {
4627 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4629 list_del_init(&dp
->dl_recall_lru
);
4630 revoke_delegation(dp
);
4633 spin_lock(&nn
->client_lock
);
4634 while (!list_empty(&nn
->close_lru
)) {
4635 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4637 if (time_after((unsigned long)oo
->oo_time
,
4638 (unsigned long)cutoff
)) {
4639 t
= oo
->oo_time
- cutoff
;
4640 new_timeo
= min(new_timeo
, t
);
4643 list_del_init(&oo
->oo_close_lru
);
4644 stp
= oo
->oo_last_closed_stid
;
4645 oo
->oo_last_closed_stid
= NULL
;
4646 spin_unlock(&nn
->client_lock
);
4647 nfs4_put_stid(&stp
->st_stid
);
4648 spin_lock(&nn
->client_lock
);
4650 spin_unlock(&nn
->client_lock
);
4653 * It's possible for a client to try and acquire an already held lock
4654 * that is being held for a long time, and then lose interest in it.
4655 * So, we clean out any un-revisited request after a lease period
4656 * under the assumption that the client is no longer interested.
4658 * RFC5661, sec. 9.6 states that the client must not rely on getting
4659 * notifications and must continue to poll for locks, even when the
4660 * server supports them. Thus this shouldn't lead to clients blocking
4661 * indefinitely once the lock does become free.
4663 BUG_ON(!list_empty(&reaplist
));
4664 spin_lock(&nn
->blocked_locks_lock
);
4665 while (!list_empty(&nn
->blocked_locks_lru
)) {
4666 nbl
= list_first_entry(&nn
->blocked_locks_lru
,
4667 struct nfsd4_blocked_lock
, nbl_lru
);
4668 if (time_after((unsigned long)nbl
->nbl_time
,
4669 (unsigned long)cutoff
)) {
4670 t
= nbl
->nbl_time
- cutoff
;
4671 new_timeo
= min(new_timeo
, t
);
4674 list_move(&nbl
->nbl_lru
, &reaplist
);
4675 list_del_init(&nbl
->nbl_list
);
4677 spin_unlock(&nn
->blocked_locks_lock
);
4679 while (!list_empty(&reaplist
)) {
4680 nbl
= list_first_entry(&nn
->blocked_locks_lru
,
4681 struct nfsd4_blocked_lock
, nbl_lru
);
4682 list_del_init(&nbl
->nbl_lru
);
4683 posix_unblock_lock(&nbl
->nbl_lock
);
4684 free_blocked_lock(nbl
);
4687 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4691 static struct workqueue_struct
*laundry_wq
;
4692 static void laundromat_main(struct work_struct
*);
4695 laundromat_main(struct work_struct
*laundry
)
4698 struct delayed_work
*dwork
= to_delayed_work(laundry
);
4699 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4702 t
= nfs4_laundromat(nn
);
4703 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4704 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4707 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stid
*stp
)
4709 if (!fh_match(&fhp
->fh_handle
, &stp
->sc_file
->fi_fhandle
))
4710 return nfserr_bad_stateid
;
4715 access_permit_read(struct nfs4_ol_stateid
*stp
)
4717 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4718 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4719 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4723 access_permit_write(struct nfs4_ol_stateid
*stp
)
4725 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4726 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4730 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4732 __be32 status
= nfserr_openmode
;
4734 /* For lock stateid's, we test the parent open, not the lock: */
4735 if (stp
->st_openstp
)
4736 stp
= stp
->st_openstp
;
4737 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4739 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4746 static inline __be32
4747 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4749 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4751 else if (opens_in_grace(net
)) {
4752 /* Answer in remaining cases depends on existence of
4753 * conflicting state; so we must wait out the grace period. */
4754 return nfserr_grace
;
4755 } else if (flags
& WR_STATE
)
4756 return nfs4_share_conflict(current_fh
,
4757 NFS4_SHARE_DENY_WRITE
);
4758 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4759 return nfs4_share_conflict(current_fh
,
4760 NFS4_SHARE_DENY_READ
);
4764 * Allow READ/WRITE during grace period on recovered state only for files
4765 * that are not able to provide mandatory locking.
4768 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4770 return opens_in_grace(net
) && mandatory_lock(inode
);
4773 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4776 * When sessions are used the stateid generation number is ignored
4779 if (has_session
&& in
->si_generation
== 0)
4782 if (in
->si_generation
== ref
->si_generation
)
4785 /* If the client sends us a stateid from the future, it's buggy: */
4786 if (nfsd4_stateid_generation_after(in
, ref
))
4787 return nfserr_bad_stateid
;
4789 * However, we could see a stateid from the past, even from a
4790 * non-buggy client. For example, if the client sends a lock
4791 * while some IO is outstanding, the lock may bump si_generation
4792 * while the IO is still in flight. The client could avoid that
4793 * situation by waiting for responses on all the IO requests,
4794 * but better performance may result in retrying IO that
4795 * receives an old_stateid error if requests are rarely
4796 * reordered in flight:
4798 return nfserr_old_stateid
;
4801 static __be32
nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid
*ols
)
4803 if (ols
->st_stateowner
->so_is_open_owner
&&
4804 !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4805 return nfserr_bad_stateid
;
4809 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4811 struct nfs4_stid
*s
;
4812 __be32 status
= nfserr_bad_stateid
;
4814 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4816 /* Client debugging aid. */
4817 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4818 char addr_str
[INET6_ADDRSTRLEN
];
4819 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4821 pr_warn_ratelimited("NFSD: client %s testing state ID "
4822 "with incorrect client ID\n", addr_str
);
4825 spin_lock(&cl
->cl_lock
);
4826 s
= find_stateid_locked(cl
, stateid
);
4829 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4832 switch (s
->sc_type
) {
4833 case NFS4_DELEG_STID
:
4836 case NFS4_REVOKED_DELEG_STID
:
4837 status
= nfserr_deleg_revoked
;
4839 case NFS4_OPEN_STID
:
4840 case NFS4_LOCK_STID
:
4841 status
= nfsd4_check_openowner_confirmed(openlockstateid(s
));
4844 printk("unknown stateid type %x\n", s
->sc_type
);
4846 case NFS4_CLOSED_STID
:
4847 case NFS4_CLOSED_DELEG_STID
:
4848 status
= nfserr_bad_stateid
;
4851 spin_unlock(&cl
->cl_lock
);
4856 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4857 stateid_t
*stateid
, unsigned char typemask
,
4858 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4862 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4863 return nfserr_bad_stateid
;
4864 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
4865 if (status
== nfserr_stale_clientid
) {
4866 if (cstate
->session
)
4867 return nfserr_bad_stateid
;
4868 return nfserr_stale_stateid
;
4872 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
4874 return nfserr_bad_stateid
;
4878 static struct file
*
4879 nfs4_find_file(struct nfs4_stid
*s
, int flags
)
4884 switch (s
->sc_type
) {
4885 case NFS4_DELEG_STID
:
4886 if (WARN_ON_ONCE(!s
->sc_file
->fi_deleg_file
))
4888 return get_file(s
->sc_file
->fi_deleg_file
);
4889 case NFS4_OPEN_STID
:
4890 case NFS4_LOCK_STID
:
4891 if (flags
& RD_STATE
)
4892 return find_readable_file(s
->sc_file
);
4894 return find_writeable_file(s
->sc_file
);
4902 nfs4_check_olstateid(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*ols
, int flags
)
4906 status
= nfsd4_check_openowner_confirmed(ols
);
4909 return nfs4_check_openmode(ols
, flags
);
4913 nfs4_check_file(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct nfs4_stid
*s
,
4914 struct file
**filpp
, bool *tmp_file
, int flags
)
4916 int acc
= (flags
& RD_STATE
) ? NFSD_MAY_READ
: NFSD_MAY_WRITE
;
4920 file
= nfs4_find_file(s
, flags
);
4922 status
= nfsd_permission(rqstp
, fhp
->fh_export
, fhp
->fh_dentry
,
4923 acc
| NFSD_MAY_OWNER_OVERRIDE
);
4931 status
= nfsd_open(rqstp
, fhp
, S_IFREG
, acc
, filpp
);
4943 * Checks for stateid operations
4946 nfs4_preprocess_stateid_op(struct svc_rqst
*rqstp
,
4947 struct nfsd4_compound_state
*cstate
, struct svc_fh
*fhp
,
4948 stateid_t
*stateid
, int flags
, struct file
**filpp
, bool *tmp_file
)
4950 struct inode
*ino
= d_inode(fhp
->fh_dentry
);
4951 struct net
*net
= SVC_NET(rqstp
);
4952 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4953 struct nfs4_stid
*s
= NULL
;
4961 if (grace_disallows_io(net
, ino
))
4962 return nfserr_grace
;
4964 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
4965 status
= check_special_stateids(net
, fhp
, stateid
, flags
);
4969 status
= nfsd4_lookup_stateid(cstate
, stateid
,
4970 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
4974 status
= check_stateid_generation(stateid
, &s
->sc_stateid
,
4975 nfsd4_has_session(cstate
));
4979 switch (s
->sc_type
) {
4980 case NFS4_DELEG_STID
:
4981 status
= nfs4_check_delegmode(delegstateid(s
), flags
);
4983 case NFS4_OPEN_STID
:
4984 case NFS4_LOCK_STID
:
4985 status
= nfs4_check_olstateid(fhp
, openlockstateid(s
), flags
);
4988 status
= nfserr_bad_stateid
;
4993 status
= nfs4_check_fh(fhp
, s
);
4996 if (!status
&& filpp
)
4997 status
= nfs4_check_file(rqstp
, fhp
, s
, filpp
, tmp_file
, flags
);
5005 * Test if the stateid is valid
5008 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5009 union nfsd4_op_u
*u
)
5011 struct nfsd4_test_stateid
*test_stateid
= &u
->test_stateid
;
5012 struct nfsd4_test_stateid_id
*stateid
;
5013 struct nfs4_client
*cl
= cstate
->session
->se_client
;
5015 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
5016 stateid
->ts_id_status
=
5017 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
5023 nfsd4_free_lock_stateid(stateid_t
*stateid
, struct nfs4_stid
*s
)
5025 struct nfs4_ol_stateid
*stp
= openlockstateid(s
);
5028 mutex_lock(&stp
->st_mutex
);
5030 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
5034 ret
= nfserr_locks_held
;
5035 if (check_for_locks(stp
->st_stid
.sc_file
,
5036 lockowner(stp
->st_stateowner
)))
5039 release_lock_stateid(stp
);
5043 mutex_unlock(&stp
->st_mutex
);
5049 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5050 union nfsd4_op_u
*u
)
5052 struct nfsd4_free_stateid
*free_stateid
= &u
->free_stateid
;
5053 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
5054 struct nfs4_stid
*s
;
5055 struct nfs4_delegation
*dp
;
5056 struct nfs4_client
*cl
= cstate
->session
->se_client
;
5057 __be32 ret
= nfserr_bad_stateid
;
5059 spin_lock(&cl
->cl_lock
);
5060 s
= find_stateid_locked(cl
, stateid
);
5063 switch (s
->sc_type
) {
5064 case NFS4_DELEG_STID
:
5065 ret
= nfserr_locks_held
;
5067 case NFS4_OPEN_STID
:
5068 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
5071 ret
= nfserr_locks_held
;
5073 case NFS4_LOCK_STID
:
5074 atomic_inc(&s
->sc_count
);
5075 spin_unlock(&cl
->cl_lock
);
5076 ret
= nfsd4_free_lock_stateid(stateid
, s
);
5078 case NFS4_REVOKED_DELEG_STID
:
5079 dp
= delegstateid(s
);
5080 list_del_init(&dp
->dl_recall_lru
);
5081 spin_unlock(&cl
->cl_lock
);
5085 /* Default falls through and returns nfserr_bad_stateid */
5088 spin_unlock(&cl
->cl_lock
);
5096 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
5097 RD_STATE
: WR_STATE
;
5100 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
5102 struct svc_fh
*current_fh
= &cstate
->current_fh
;
5103 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
5106 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
5109 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
5110 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
5112 * "Closed" stateid's exist *only* to return
5113 * nfserr_replay_me from the previous step, and
5114 * revoked delegations are kept only for free_stateid.
5116 return nfserr_bad_stateid
;
5117 mutex_lock(&stp
->st_mutex
);
5118 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
5119 if (status
== nfs_ok
)
5120 status
= nfs4_check_fh(current_fh
, &stp
->st_stid
);
5121 if (status
!= nfs_ok
)
5122 mutex_unlock(&stp
->st_mutex
);
5127 * Checks for sequence id mutating operations.
5130 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
5131 stateid_t
*stateid
, char typemask
,
5132 struct nfs4_ol_stateid
**stpp
,
5133 struct nfsd_net
*nn
)
5136 struct nfs4_stid
*s
;
5137 struct nfs4_ol_stateid
*stp
= NULL
;
5139 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
5140 seqid
, STATEID_VAL(stateid
));
5143 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
5146 stp
= openlockstateid(s
);
5147 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
5149 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
5153 nfs4_put_stid(&stp
->st_stid
);
5157 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
5158 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
5161 struct nfs4_openowner
*oo
;
5162 struct nfs4_ol_stateid
*stp
;
5164 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
5165 NFS4_OPEN_STID
, &stp
, nn
);
5168 oo
= openowner(stp
->st_stateowner
);
5169 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
5170 mutex_unlock(&stp
->st_mutex
);
5171 nfs4_put_stid(&stp
->st_stid
);
5172 return nfserr_bad_stateid
;
5179 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5180 union nfsd4_op_u
*u
)
5182 struct nfsd4_open_confirm
*oc
= &u
->open_confirm
;
5184 struct nfs4_openowner
*oo
;
5185 struct nfs4_ol_stateid
*stp
;
5186 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5188 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5189 cstate
->current_fh
.fh_dentry
);
5191 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
5195 status
= nfs4_preprocess_seqid_op(cstate
,
5196 oc
->oc_seqid
, &oc
->oc_req_stateid
,
5197 NFS4_OPEN_STID
, &stp
, nn
);
5200 oo
= openowner(stp
->st_stateowner
);
5201 status
= nfserr_bad_stateid
;
5202 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
) {
5203 mutex_unlock(&stp
->st_mutex
);
5206 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
5207 nfs4_inc_and_copy_stateid(&oc
->oc_resp_stateid
, &stp
->st_stid
);
5208 mutex_unlock(&stp
->st_mutex
);
5209 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
5210 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
5212 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
5215 nfs4_put_stid(&stp
->st_stid
);
5217 nfsd4_bump_seqid(cstate
, status
);
5221 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
5223 if (!test_access(access
, stp
))
5225 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
5226 clear_access(access
, stp
);
5229 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
5231 switch (to_access
) {
5232 case NFS4_SHARE_ACCESS_READ
:
5233 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
5234 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5236 case NFS4_SHARE_ACCESS_WRITE
:
5237 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
5238 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5240 case NFS4_SHARE_ACCESS_BOTH
:
5248 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
5249 struct nfsd4_compound_state
*cstate
, union nfsd4_op_u
*u
)
5251 struct nfsd4_open_downgrade
*od
= &u
->open_downgrade
;
5253 struct nfs4_ol_stateid
*stp
;
5254 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5256 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5257 cstate
->current_fh
.fh_dentry
);
5259 /* We don't yet support WANT bits: */
5260 if (od
->od_deleg_want
)
5261 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
5264 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
5265 &od
->od_stateid
, &stp
, nn
);
5268 status
= nfserr_inval
;
5269 if (!test_access(od
->od_share_access
, stp
)) {
5270 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5271 stp
->st_access_bmap
, od
->od_share_access
);
5274 if (!test_deny(od
->od_share_deny
, stp
)) {
5275 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5276 stp
->st_deny_bmap
, od
->od_share_deny
);
5279 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
5280 reset_union_bmap_deny(od
->od_share_deny
, stp
);
5281 nfs4_inc_and_copy_stateid(&od
->od_stateid
, &stp
->st_stid
);
5284 mutex_unlock(&stp
->st_mutex
);
5285 nfs4_put_stid(&stp
->st_stid
);
5287 nfsd4_bump_seqid(cstate
, status
);
5291 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
5293 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
5295 LIST_HEAD(reaplist
);
5297 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
5298 spin_lock(&clp
->cl_lock
);
5299 unhashed
= unhash_open_stateid(s
, &reaplist
);
5301 if (clp
->cl_minorversion
) {
5303 put_ol_stateid_locked(s
, &reaplist
);
5304 spin_unlock(&clp
->cl_lock
);
5305 free_ol_stateid_reaplist(&reaplist
);
5307 spin_unlock(&clp
->cl_lock
);
5308 free_ol_stateid_reaplist(&reaplist
);
5310 move_to_close_lru(s
, clp
->net
);
5315 * nfs4_unlock_state() called after encode
5318 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5319 union nfsd4_op_u
*u
)
5321 struct nfsd4_close
*close
= &u
->close
;
5323 struct nfs4_ol_stateid
*stp
;
5324 struct net
*net
= SVC_NET(rqstp
);
5325 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5327 dprintk("NFSD: nfsd4_close on file %pd\n",
5328 cstate
->current_fh
.fh_dentry
);
5330 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
5332 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
5334 nfsd4_bump_seqid(cstate
, status
);
5337 nfs4_inc_and_copy_stateid(&close
->cl_stateid
, &stp
->st_stid
);
5338 mutex_unlock(&stp
->st_mutex
);
5340 nfsd4_close_open_stateid(stp
);
5342 /* put reference from nfs4_preprocess_seqid_op */
5343 nfs4_put_stid(&stp
->st_stid
);
5349 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5350 union nfsd4_op_u
*u
)
5352 struct nfsd4_delegreturn
*dr
= &u
->delegreturn
;
5353 struct nfs4_delegation
*dp
;
5354 stateid_t
*stateid
= &dr
->dr_stateid
;
5355 struct nfs4_stid
*s
;
5357 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5359 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5362 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
5365 dp
= delegstateid(s
);
5366 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
5370 destroy_delegation(dp
);
5372 nfs4_put_stid(&dp
->dl_stid
);
5378 end_offset(u64 start
, u64 len
)
5383 return end
>= start
? end
: NFS4_MAX_UINT64
;
5386 /* last octet in a range */
5388 last_byte_offset(u64 start
, u64 len
)
5394 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
5398 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5399 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5400 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5401 * locking, this prevents us from being completely protocol-compliant. The
5402 * real solution to this problem is to start using unsigned file offsets in
5403 * the VFS, but this is a very deep change!
5406 nfs4_transform_lock_offset(struct file_lock
*lock
)
5408 if (lock
->fl_start
< 0)
5409 lock
->fl_start
= OFFSET_MAX
;
5410 if (lock
->fl_end
< 0)
5411 lock
->fl_end
= OFFSET_MAX
;
5415 nfsd4_fl_get_owner(fl_owner_t owner
)
5417 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5419 nfs4_get_stateowner(&lo
->lo_owner
);
5424 nfsd4_fl_put_owner(fl_owner_t owner
)
5426 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5429 nfs4_put_stateowner(&lo
->lo_owner
);
5433 nfsd4_lm_notify(struct file_lock
*fl
)
5435 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)fl
->fl_owner
;
5436 struct net
*net
= lo
->lo_owner
.so_client
->net
;
5437 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5438 struct nfsd4_blocked_lock
*nbl
= container_of(fl
,
5439 struct nfsd4_blocked_lock
, nbl_lock
);
5442 /* An empty list means that something else is going to be using it */
5443 spin_lock(&nn
->blocked_locks_lock
);
5444 if (!list_empty(&nbl
->nbl_list
)) {
5445 list_del_init(&nbl
->nbl_list
);
5446 list_del_init(&nbl
->nbl_lru
);
5449 spin_unlock(&nn
->blocked_locks_lock
);
5452 nfsd4_run_cb(&nbl
->nbl_cb
);
5455 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
5456 .lm_notify
= nfsd4_lm_notify
,
5457 .lm_get_owner
= nfsd4_fl_get_owner
,
5458 .lm_put_owner
= nfsd4_fl_put_owner
,
5462 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
5464 struct nfs4_lockowner
*lo
;
5466 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
5467 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
5468 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
5469 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
5470 if (!deny
->ld_owner
.data
)
5471 /* We just don't care that much */
5473 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
5474 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
5477 deny
->ld_owner
.len
= 0;
5478 deny
->ld_owner
.data
= NULL
;
5479 deny
->ld_clientid
.cl_boot
= 0;
5480 deny
->ld_clientid
.cl_id
= 0;
5482 deny
->ld_start
= fl
->fl_start
;
5483 deny
->ld_length
= NFS4_MAX_UINT64
;
5484 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
5485 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
5486 deny
->ld_type
= NFS4_READ_LT
;
5487 if (fl
->fl_type
!= F_RDLCK
)
5488 deny
->ld_type
= NFS4_WRITE_LT
;
5491 static struct nfs4_lockowner
*
5492 find_lockowner_str_locked(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5494 unsigned int strhashval
= ownerstr_hashval(owner
);
5495 struct nfs4_stateowner
*so
;
5497 lockdep_assert_held(&clp
->cl_lock
);
5499 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
5501 if (so
->so_is_open_owner
)
5503 if (same_owner_str(so
, owner
))
5504 return lockowner(nfs4_get_stateowner(so
));
5509 static struct nfs4_lockowner
*
5510 find_lockowner_str(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5512 struct nfs4_lockowner
*lo
;
5514 spin_lock(&clp
->cl_lock
);
5515 lo
= find_lockowner_str_locked(clp
, owner
);
5516 spin_unlock(&clp
->cl_lock
);
5520 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
5522 unhash_lockowner_locked(lockowner(sop
));
5525 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
5527 struct nfs4_lockowner
*lo
= lockowner(sop
);
5529 kmem_cache_free(lockowner_slab
, lo
);
5532 static const struct nfs4_stateowner_operations lockowner_ops
= {
5533 .so_unhash
= nfs4_unhash_lockowner
,
5534 .so_free
= nfs4_free_lockowner
,
5538 * Alloc a lock owner structure.
5539 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5542 * strhashval = ownerstr_hashval
5544 static struct nfs4_lockowner
*
5545 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
5546 struct nfs4_ol_stateid
*open_stp
,
5547 struct nfsd4_lock
*lock
)
5549 struct nfs4_lockowner
*lo
, *ret
;
5551 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
5554 INIT_LIST_HEAD(&lo
->lo_blocked
);
5555 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
5556 lo
->lo_owner
.so_is_open_owner
= 0;
5557 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
5558 lo
->lo_owner
.so_ops
= &lockowner_ops
;
5559 spin_lock(&clp
->cl_lock
);
5560 ret
= find_lockowner_str_locked(clp
, &lock
->lk_new_owner
);
5562 list_add(&lo
->lo_owner
.so_strhash
,
5563 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5566 nfs4_free_stateowner(&lo
->lo_owner
);
5568 spin_unlock(&clp
->cl_lock
);
5573 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5574 struct nfs4_file
*fp
, struct inode
*inode
,
5575 struct nfs4_ol_stateid
*open_stp
)
5577 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5579 lockdep_assert_held(&clp
->cl_lock
);
5581 atomic_inc(&stp
->st_stid
.sc_count
);
5582 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5583 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5585 stp
->st_stid
.sc_file
= fp
;
5586 stp
->st_access_bmap
= 0;
5587 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5588 stp
->st_openstp
= open_stp
;
5589 mutex_init(&stp
->st_mutex
);
5590 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5591 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5592 spin_lock(&fp
->fi_lock
);
5593 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5594 spin_unlock(&fp
->fi_lock
);
5597 static struct nfs4_ol_stateid
*
5598 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5600 struct nfs4_ol_stateid
*lst
;
5601 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5603 lockdep_assert_held(&clp
->cl_lock
);
5605 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5606 if (lst
->st_stid
.sc_file
== fp
) {
5607 atomic_inc(&lst
->st_stid
.sc_count
);
5614 static struct nfs4_ol_stateid
*
5615 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5616 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5619 struct nfs4_stid
*ns
= NULL
;
5620 struct nfs4_ol_stateid
*lst
;
5621 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5622 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5624 spin_lock(&clp
->cl_lock
);
5625 lst
= find_lock_stateid(lo
, fi
);
5627 spin_unlock(&clp
->cl_lock
);
5628 ns
= nfs4_alloc_stid(clp
, stateid_slab
, nfs4_free_lock_stateid
);
5632 spin_lock(&clp
->cl_lock
);
5633 lst
= find_lock_stateid(lo
, fi
);
5635 lst
= openlockstateid(ns
);
5636 init_lock_stateid(lst
, lo
, fi
, inode
, ost
);
5641 spin_unlock(&clp
->cl_lock
);
5648 check_lock_length(u64 offset
, u64 length
)
5650 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5651 (length
> ~offset
)));
5654 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5656 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5658 lockdep_assert_held(&fp
->fi_lock
);
5660 if (test_access(access
, lock_stp
))
5662 __nfs4_file_get_access(fp
, access
);
5663 set_access(access
, lock_stp
);
5667 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5668 struct nfs4_ol_stateid
*ost
,
5669 struct nfsd4_lock
*lock
,
5670 struct nfs4_ol_stateid
**plst
, bool *new)
5673 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5674 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5675 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5676 struct inode
*inode
= d_inode(cstate
->current_fh
.fh_dentry
);
5677 struct nfs4_lockowner
*lo
;
5678 struct nfs4_ol_stateid
*lst
;
5679 unsigned int strhashval
;
5682 lo
= find_lockowner_str(cl
, &lock
->lk_new_owner
);
5684 strhashval
= ownerstr_hashval(&lock
->lk_new_owner
);
5685 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5687 return nfserr_jukebox
;
5689 /* with an existing lockowner, seqids must be the same */
5690 status
= nfserr_bad_seqid
;
5691 if (!cstate
->minorversion
&&
5692 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5697 lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5699 status
= nfserr_jukebox
;
5703 mutex_lock(&lst
->st_mutex
);
5705 /* See if it's still hashed to avoid race with FREE_STATEID */
5706 spin_lock(&cl
->cl_lock
);
5707 hashed
= !list_empty(&lst
->st_perfile
);
5708 spin_unlock(&cl
->cl_lock
);
5711 mutex_unlock(&lst
->st_mutex
);
5712 nfs4_put_stid(&lst
->st_stid
);
5718 nfs4_put_stateowner(&lo
->lo_owner
);
5726 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5727 union nfsd4_op_u
*u
)
5729 struct nfsd4_lock
*lock
= &u
->lock
;
5730 struct nfs4_openowner
*open_sop
= NULL
;
5731 struct nfs4_lockowner
*lock_sop
= NULL
;
5732 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5733 struct nfs4_ol_stateid
*open_stp
= NULL
;
5734 struct nfs4_file
*fp
;
5735 struct file
*filp
= NULL
;
5736 struct nfsd4_blocked_lock
*nbl
= NULL
;
5737 struct file_lock
*file_lock
= NULL
;
5738 struct file_lock
*conflock
= NULL
;
5743 unsigned char fl_type
;
5744 unsigned int fl_flags
= FL_POSIX
;
5745 struct net
*net
= SVC_NET(rqstp
);
5746 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5748 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5749 (long long) lock
->lk_offset
,
5750 (long long) lock
->lk_length
);
5752 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5753 return nfserr_inval
;
5755 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5756 S_IFREG
, NFSD_MAY_LOCK
))) {
5757 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5761 if (lock
->lk_is_new
) {
5762 if (nfsd4_has_session(cstate
))
5763 /* See rfc 5661 18.10.3: given clientid is ignored: */
5764 memcpy(&lock
->lk_new_clientid
,
5765 &cstate
->session
->se_client
->cl_clientid
,
5766 sizeof(clientid_t
));
5768 status
= nfserr_stale_clientid
;
5769 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5772 /* validate and update open stateid and open seqid */
5773 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5774 lock
->lk_new_open_seqid
,
5775 &lock
->lk_new_open_stateid
,
5779 mutex_unlock(&open_stp
->st_mutex
);
5780 open_sop
= openowner(open_stp
->st_stateowner
);
5781 status
= nfserr_bad_stateid
;
5782 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5783 &lock
->lk_new_clientid
))
5785 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5788 status
= nfs4_preprocess_seqid_op(cstate
,
5789 lock
->lk_old_lock_seqid
,
5790 &lock
->lk_old_lock_stateid
,
5791 NFS4_LOCK_STID
, &lock_stp
, nn
);
5795 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5797 lkflg
= setlkflg(lock
->lk_type
);
5798 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5802 status
= nfserr_grace
;
5803 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5805 status
= nfserr_no_grace
;
5806 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5809 fp
= lock_stp
->st_stid
.sc_file
;
5810 switch (lock
->lk_type
) {
5812 if (nfsd4_has_session(cstate
))
5813 fl_flags
|= FL_SLEEP
;
5816 spin_lock(&fp
->fi_lock
);
5817 filp
= find_readable_file_locked(fp
);
5819 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5820 spin_unlock(&fp
->fi_lock
);
5823 case NFS4_WRITEW_LT
:
5824 if (nfsd4_has_session(cstate
))
5825 fl_flags
|= FL_SLEEP
;
5828 spin_lock(&fp
->fi_lock
);
5829 filp
= find_writeable_file_locked(fp
);
5831 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
5832 spin_unlock(&fp
->fi_lock
);
5836 status
= nfserr_inval
;
5841 status
= nfserr_openmode
;
5845 nbl
= find_or_allocate_block(lock_sop
, &fp
->fi_fhandle
, nn
);
5847 dprintk("NFSD: %s: unable to allocate block!\n", __func__
);
5848 status
= nfserr_jukebox
;
5852 file_lock
= &nbl
->nbl_lock
;
5853 file_lock
->fl_type
= fl_type
;
5854 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
5855 file_lock
->fl_pid
= current
->tgid
;
5856 file_lock
->fl_file
= filp
;
5857 file_lock
->fl_flags
= fl_flags
;
5858 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5859 file_lock
->fl_start
= lock
->lk_offset
;
5860 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
5861 nfs4_transform_lock_offset(file_lock
);
5863 conflock
= locks_alloc_lock();
5865 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5866 status
= nfserr_jukebox
;
5870 if (fl_flags
& FL_SLEEP
) {
5871 nbl
->nbl_time
= jiffies
;
5872 spin_lock(&nn
->blocked_locks_lock
);
5873 list_add_tail(&nbl
->nbl_list
, &lock_sop
->lo_blocked
);
5874 list_add_tail(&nbl
->nbl_lru
, &nn
->blocked_locks_lru
);
5875 spin_unlock(&nn
->blocked_locks_lock
);
5878 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
5880 case 0: /* success! */
5881 nfs4_inc_and_copy_stateid(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
);
5884 case FILE_LOCK_DEFERRED
:
5887 case -EAGAIN
: /* conflock holds conflicting lock */
5888 status
= nfserr_denied
;
5889 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5890 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
5893 status
= nfserr_deadlock
;
5896 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
5897 status
= nfserrno(err
);
5902 /* dequeue it if we queued it before */
5903 if (fl_flags
& FL_SLEEP
) {
5904 spin_lock(&nn
->blocked_locks_lock
);
5905 list_del_init(&nbl
->nbl_list
);
5906 list_del_init(&nbl
->nbl_lru
);
5907 spin_unlock(&nn
->blocked_locks_lock
);
5909 free_blocked_lock(nbl
);
5914 /* Bump seqid manually if the 4.0 replay owner is openowner */
5915 if (cstate
->replay_owner
&&
5916 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
5917 seqid_mutating_err(ntohl(status
)))
5918 lock_sop
->lo_owner
.so_seqid
++;
5920 mutex_unlock(&lock_stp
->st_mutex
);
5923 * If this is a new, never-before-used stateid, and we are
5924 * returning an error, then just go ahead and release it.
5927 release_lock_stateid(lock_stp
);
5929 nfs4_put_stid(&lock_stp
->st_stid
);
5932 nfs4_put_stid(&open_stp
->st_stid
);
5933 nfsd4_bump_seqid(cstate
, status
);
5935 locks_free_lock(conflock
);
5940 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5941 * so we do a temporary open here just to get an open file to pass to
5942 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5945 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
5948 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
5950 err
= nfserrno(vfs_test_lock(file
, lock
));
5960 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5961 union nfsd4_op_u
*u
)
5963 struct nfsd4_lockt
*lockt
= &u
->lockt
;
5964 struct file_lock
*file_lock
= NULL
;
5965 struct nfs4_lockowner
*lo
= NULL
;
5967 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5969 if (locks_in_grace(SVC_NET(rqstp
)))
5970 return nfserr_grace
;
5972 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
5973 return nfserr_inval
;
5975 if (!nfsd4_has_session(cstate
)) {
5976 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
5981 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5984 file_lock
= locks_alloc_lock();
5986 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5987 status
= nfserr_jukebox
;
5991 switch (lockt
->lt_type
) {
5994 file_lock
->fl_type
= F_RDLCK
;
5997 case NFS4_WRITEW_LT
:
5998 file_lock
->fl_type
= F_WRLCK
;
6001 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
6002 status
= nfserr_inval
;
6006 lo
= find_lockowner_str(cstate
->clp
, &lockt
->lt_owner
);
6008 file_lock
->fl_owner
= (fl_owner_t
)lo
;
6009 file_lock
->fl_pid
= current
->tgid
;
6010 file_lock
->fl_flags
= FL_POSIX
;
6012 file_lock
->fl_start
= lockt
->lt_offset
;
6013 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
6015 nfs4_transform_lock_offset(file_lock
);
6017 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
6021 if (file_lock
->fl_type
!= F_UNLCK
) {
6022 status
= nfserr_denied
;
6023 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
6027 nfs4_put_stateowner(&lo
->lo_owner
);
6029 locks_free_lock(file_lock
);
6034 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
6035 union nfsd4_op_u
*u
)
6037 struct nfsd4_locku
*locku
= &u
->locku
;
6038 struct nfs4_ol_stateid
*stp
;
6039 struct file
*filp
= NULL
;
6040 struct file_lock
*file_lock
= NULL
;
6043 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
6045 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
6046 (long long) locku
->lu_offset
,
6047 (long long) locku
->lu_length
);
6049 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
6050 return nfserr_inval
;
6052 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
6053 &locku
->lu_stateid
, NFS4_LOCK_STID
,
6057 filp
= find_any_file(stp
->st_stid
.sc_file
);
6059 status
= nfserr_lock_range
;
6062 file_lock
= locks_alloc_lock();
6064 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
6065 status
= nfserr_jukebox
;
6069 file_lock
->fl_type
= F_UNLCK
;
6070 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
6071 file_lock
->fl_pid
= current
->tgid
;
6072 file_lock
->fl_file
= filp
;
6073 file_lock
->fl_flags
= FL_POSIX
;
6074 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
6075 file_lock
->fl_start
= locku
->lu_offset
;
6077 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
6079 nfs4_transform_lock_offset(file_lock
);
6081 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
6083 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
6086 nfs4_inc_and_copy_stateid(&locku
->lu_stateid
, &stp
->st_stid
);
6090 mutex_unlock(&stp
->st_mutex
);
6091 nfs4_put_stid(&stp
->st_stid
);
6093 nfsd4_bump_seqid(cstate
, status
);
6095 locks_free_lock(file_lock
);
6099 status
= nfserrno(err
);
6105 * true: locks held by lockowner
6106 * false: no locks held by lockowner
6109 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
6111 struct file_lock
*fl
;
6113 struct file
*filp
= find_any_file(fp
);
6114 struct inode
*inode
;
6115 struct file_lock_context
*flctx
;
6118 /* Any valid lock stateid should have some sort of access */
6123 inode
= file_inode(filp
);
6124 flctx
= inode
->i_flctx
;
6126 if (flctx
&& !list_empty_careful(&flctx
->flc_posix
)) {
6127 spin_lock(&flctx
->flc_lock
);
6128 list_for_each_entry(fl
, &flctx
->flc_posix
, fl_list
) {
6129 if (fl
->fl_owner
== (fl_owner_t
)lowner
) {
6134 spin_unlock(&flctx
->flc_lock
);
6141 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
6142 struct nfsd4_compound_state
*cstate
,
6143 union nfsd4_op_u
*u
)
6145 struct nfsd4_release_lockowner
*rlockowner
= &u
->release_lockowner
;
6146 clientid_t
*clid
= &rlockowner
->rl_clientid
;
6147 struct nfs4_stateowner
*sop
;
6148 struct nfs4_lockowner
*lo
= NULL
;
6149 struct nfs4_ol_stateid
*stp
;
6150 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
6151 unsigned int hashval
= ownerstr_hashval(owner
);
6153 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
6154 struct nfs4_client
*clp
;
6155 LIST_HEAD (reaplist
);
6157 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
6158 clid
->cl_boot
, clid
->cl_id
);
6160 status
= lookup_clientid(clid
, cstate
, nn
);
6165 /* Find the matching lock stateowner */
6166 spin_lock(&clp
->cl_lock
);
6167 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
6170 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
6173 /* see if there are still any locks associated with it */
6174 lo
= lockowner(sop
);
6175 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
6176 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
6177 status
= nfserr_locks_held
;
6178 spin_unlock(&clp
->cl_lock
);
6183 nfs4_get_stateowner(sop
);
6187 spin_unlock(&clp
->cl_lock
);
6191 unhash_lockowner_locked(lo
);
6192 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
6193 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
6194 struct nfs4_ol_stateid
,
6196 WARN_ON(!unhash_lock_stateid(stp
));
6197 put_ol_stateid_locked(stp
, &reaplist
);
6199 spin_unlock(&clp
->cl_lock
);
6200 free_ol_stateid_reaplist(&reaplist
);
6201 nfs4_put_stateowner(&lo
->lo_owner
);
6206 static inline struct nfs4_client_reclaim
*
6209 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
6213 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
6215 struct nfs4_client_reclaim
*crp
;
6217 crp
= nfsd4_find_reclaim_client(name
, nn
);
6218 return (crp
&& crp
->cr_clp
);
6222 * failure => all reset bets are off, nfserr_no_grace...
6224 struct nfs4_client_reclaim
*
6225 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
6227 unsigned int strhashval
;
6228 struct nfs4_client_reclaim
*crp
;
6230 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
6231 crp
= alloc_reclaim();
6233 strhashval
= clientstr_hashval(name
);
6234 INIT_LIST_HEAD(&crp
->cr_strhash
);
6235 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
6236 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
6238 nn
->reclaim_str_hashtbl_size
++;
6244 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
6246 list_del(&crp
->cr_strhash
);
6248 nn
->reclaim_str_hashtbl_size
--;
6252 nfs4_release_reclaim(struct nfsd_net
*nn
)
6254 struct nfs4_client_reclaim
*crp
= NULL
;
6257 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6258 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
6259 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
6260 struct nfs4_client_reclaim
, cr_strhash
);
6261 nfs4_remove_reclaim_record(crp
, nn
);
6264 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
6268 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
6269 struct nfs4_client_reclaim
*
6270 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
6272 unsigned int strhashval
;
6273 struct nfs4_client_reclaim
*crp
= NULL
;
6275 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
6277 strhashval
= clientstr_hashval(recdir
);
6278 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
6279 if (same_name(crp
->cr_recdir
, recdir
)) {
6287 * Called from OPEN. Look for clientid in reclaim list.
6290 nfs4_check_open_reclaim(clientid_t
*clid
,
6291 struct nfsd4_compound_state
*cstate
,
6292 struct nfsd_net
*nn
)
6296 /* find clientid in conf_id_hashtbl */
6297 status
= lookup_clientid(clid
, cstate
, nn
);
6299 return nfserr_reclaim_bad
;
6301 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
, &cstate
->clp
->cl_flags
))
6302 return nfserr_no_grace
;
6304 if (nfsd4_client_record_check(cstate
->clp
))
6305 return nfserr_reclaim_bad
;
6310 #ifdef CONFIG_NFSD_FAULT_INJECTION
6312 put_client(struct nfs4_client
*clp
)
6314 atomic_dec(&clp
->cl_refcount
);
6317 static struct nfs4_client
*
6318 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6320 struct nfs4_client
*clp
;
6321 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6324 if (!nfsd_netns_ready(nn
))
6327 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6328 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
6335 nfsd_inject_print_clients(void)
6337 struct nfs4_client
*clp
;
6339 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6341 char buf
[INET6_ADDRSTRLEN
];
6343 if (!nfsd_netns_ready(nn
))
6346 spin_lock(&nn
->client_lock
);
6347 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6348 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6349 pr_info("NFS Client: %s\n", buf
);
6352 spin_unlock(&nn
->client_lock
);
6358 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6361 struct nfs4_client
*clp
;
6362 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6365 if (!nfsd_netns_ready(nn
))
6368 spin_lock(&nn
->client_lock
);
6369 clp
= nfsd_find_client(addr
, addr_size
);
6371 if (mark_client_expired_locked(clp
) == nfs_ok
)
6376 spin_unlock(&nn
->client_lock
);
6385 nfsd_inject_forget_clients(u64 max
)
6388 struct nfs4_client
*clp
, *next
;
6389 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6391 LIST_HEAD(reaplist
);
6393 if (!nfsd_netns_ready(nn
))
6396 spin_lock(&nn
->client_lock
);
6397 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6398 if (mark_client_expired_locked(clp
) == nfs_ok
) {
6399 list_add(&clp
->cl_lru
, &reaplist
);
6400 if (max
!= 0 && ++count
>= max
)
6404 spin_unlock(&nn
->client_lock
);
6406 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
6412 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
6415 char buf
[INET6_ADDRSTRLEN
];
6416 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6417 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
6421 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
6422 struct list_head
*collect
)
6424 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
6425 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6431 lockdep_assert_held(&nn
->client_lock
);
6432 atomic_inc(&clp
->cl_refcount
);
6433 list_add(&lst
->st_locks
, collect
);
6436 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
6437 struct list_head
*collect
,
6438 bool (*func
)(struct nfs4_ol_stateid
*))
6440 struct nfs4_openowner
*oop
;
6441 struct nfs4_ol_stateid
*stp
, *st_next
;
6442 struct nfs4_ol_stateid
*lst
, *lst_next
;
6445 spin_lock(&clp
->cl_lock
);
6446 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
6447 list_for_each_entry_safe(stp
, st_next
,
6448 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
6449 list_for_each_entry_safe(lst
, lst_next
,
6450 &stp
->st_locks
, st_locks
) {
6453 nfsd_inject_add_lock_to_list(lst
,
6458 * Despite the fact that these functions deal
6459 * with 64-bit integers for "count", we must
6460 * ensure that it doesn't blow up the
6461 * clp->cl_refcount. Throw a warning if we
6462 * start to approach INT_MAX here.
6464 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6471 spin_unlock(&clp
->cl_lock
);
6477 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
6480 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
6484 nfsd_print_client_locks(struct nfs4_client
*clp
)
6486 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
6487 nfsd_print_count(clp
, count
, "locked files");
6492 nfsd_inject_print_locks(void)
6494 struct nfs4_client
*clp
;
6496 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6499 if (!nfsd_netns_ready(nn
))
6502 spin_lock(&nn
->client_lock
);
6503 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6504 count
+= nfsd_print_client_locks(clp
);
6505 spin_unlock(&nn
->client_lock
);
6511 nfsd_reap_locks(struct list_head
*reaplist
)
6513 struct nfs4_client
*clp
;
6514 struct nfs4_ol_stateid
*stp
, *next
;
6516 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
6517 list_del_init(&stp
->st_locks
);
6518 clp
= stp
->st_stid
.sc_client
;
6519 nfs4_put_stid(&stp
->st_stid
);
6525 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
6527 unsigned int count
= 0;
6528 struct nfs4_client
*clp
;
6529 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6531 LIST_HEAD(reaplist
);
6533 if (!nfsd_netns_ready(nn
))
6536 spin_lock(&nn
->client_lock
);
6537 clp
= nfsd_find_client(addr
, addr_size
);
6539 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
6540 spin_unlock(&nn
->client_lock
);
6541 nfsd_reap_locks(&reaplist
);
6546 nfsd_inject_forget_locks(u64 max
)
6549 struct nfs4_client
*clp
;
6550 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6552 LIST_HEAD(reaplist
);
6554 if (!nfsd_netns_ready(nn
))
6557 spin_lock(&nn
->client_lock
);
6558 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6559 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
6560 if (max
!= 0 && count
>= max
)
6563 spin_unlock(&nn
->client_lock
);
6564 nfsd_reap_locks(&reaplist
);
6569 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
6570 struct list_head
*collect
,
6571 void (*func
)(struct nfs4_openowner
*))
6573 struct nfs4_openowner
*oop
, *next
;
6574 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6578 lockdep_assert_held(&nn
->client_lock
);
6580 spin_lock(&clp
->cl_lock
);
6581 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
6585 atomic_inc(&clp
->cl_refcount
);
6586 list_add(&oop
->oo_perclient
, collect
);
6591 * Despite the fact that these functions deal with
6592 * 64-bit integers for "count", we must ensure that
6593 * it doesn't blow up the clp->cl_refcount. Throw a
6594 * warning if we start to approach INT_MAX here.
6596 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6600 spin_unlock(&clp
->cl_lock
);
6606 nfsd_print_client_openowners(struct nfs4_client
*clp
)
6608 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
6610 nfsd_print_count(clp
, count
, "openowners");
6615 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
6616 struct list_head
*collect
, u64 max
)
6618 return nfsd_foreach_client_openowner(clp
, max
, collect
,
6619 unhash_openowner_locked
);
6623 nfsd_inject_print_openowners(void)
6625 struct nfs4_client
*clp
;
6627 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6630 if (!nfsd_netns_ready(nn
))
6633 spin_lock(&nn
->client_lock
);
6634 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6635 count
+= nfsd_print_client_openowners(clp
);
6636 spin_unlock(&nn
->client_lock
);
6642 nfsd_reap_openowners(struct list_head
*reaplist
)
6644 struct nfs4_client
*clp
;
6645 struct nfs4_openowner
*oop
, *next
;
6647 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6648 list_del_init(&oop
->oo_perclient
);
6649 clp
= oop
->oo_owner
.so_client
;
6650 release_openowner(oop
);
6656 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6659 unsigned int count
= 0;
6660 struct nfs4_client
*clp
;
6661 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6663 LIST_HEAD(reaplist
);
6665 if (!nfsd_netns_ready(nn
))
6668 spin_lock(&nn
->client_lock
);
6669 clp
= nfsd_find_client(addr
, addr_size
);
6671 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6672 spin_unlock(&nn
->client_lock
);
6673 nfsd_reap_openowners(&reaplist
);
6678 nfsd_inject_forget_openowners(u64 max
)
6681 struct nfs4_client
*clp
;
6682 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6684 LIST_HEAD(reaplist
);
6686 if (!nfsd_netns_ready(nn
))
6689 spin_lock(&nn
->client_lock
);
6690 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6691 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6693 if (max
!= 0 && count
>= max
)
6696 spin_unlock(&nn
->client_lock
);
6697 nfsd_reap_openowners(&reaplist
);
6701 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6702 struct list_head
*victims
)
6704 struct nfs4_delegation
*dp
, *next
;
6705 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6709 lockdep_assert_held(&nn
->client_lock
);
6711 spin_lock(&state_lock
);
6712 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6715 * It's not safe to mess with delegations that have a
6716 * non-zero dl_time. They might have already been broken
6717 * and could be processed by the laundromat outside of
6718 * the state_lock. Just leave them be.
6720 if (dp
->dl_time
!= 0)
6723 atomic_inc(&clp
->cl_refcount
);
6724 WARN_ON(!unhash_delegation_locked(dp
));
6725 list_add(&dp
->dl_recall_lru
, victims
);
6729 * Despite the fact that these functions deal with
6730 * 64-bit integers for "count", we must ensure that
6731 * it doesn't blow up the clp->cl_refcount. Throw a
6732 * warning if we start to approach INT_MAX here.
6734 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6738 spin_unlock(&state_lock
);
6743 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6745 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6747 nfsd_print_count(clp
, count
, "delegations");
6752 nfsd_inject_print_delegations(void)
6754 struct nfs4_client
*clp
;
6756 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6759 if (!nfsd_netns_ready(nn
))
6762 spin_lock(&nn
->client_lock
);
6763 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6764 count
+= nfsd_print_client_delegations(clp
);
6765 spin_unlock(&nn
->client_lock
);
6771 nfsd_forget_delegations(struct list_head
*reaplist
)
6773 struct nfs4_client
*clp
;
6774 struct nfs4_delegation
*dp
, *next
;
6776 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6777 list_del_init(&dp
->dl_recall_lru
);
6778 clp
= dp
->dl_stid
.sc_client
;
6779 revoke_delegation(dp
);
6785 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6789 struct nfs4_client
*clp
;
6790 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6792 LIST_HEAD(reaplist
);
6794 if (!nfsd_netns_ready(nn
))
6797 spin_lock(&nn
->client_lock
);
6798 clp
= nfsd_find_client(addr
, addr_size
);
6800 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6801 spin_unlock(&nn
->client_lock
);
6803 nfsd_forget_delegations(&reaplist
);
6808 nfsd_inject_forget_delegations(u64 max
)
6811 struct nfs4_client
*clp
;
6812 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6814 LIST_HEAD(reaplist
);
6816 if (!nfsd_netns_ready(nn
))
6819 spin_lock(&nn
->client_lock
);
6820 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6821 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6822 if (max
!= 0 && count
>= max
)
6825 spin_unlock(&nn
->client_lock
);
6826 nfsd_forget_delegations(&reaplist
);
6831 nfsd_recall_delegations(struct list_head
*reaplist
)
6833 struct nfs4_client
*clp
;
6834 struct nfs4_delegation
*dp
, *next
;
6836 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6837 list_del_init(&dp
->dl_recall_lru
);
6838 clp
= dp
->dl_stid
.sc_client
;
6840 * We skipped all entries that had a zero dl_time before,
6841 * so we can now reset the dl_time back to 0. If a delegation
6842 * break comes in now, then it won't make any difference since
6843 * we're recalling it either way.
6845 spin_lock(&state_lock
);
6847 spin_unlock(&state_lock
);
6848 nfsd_break_one_deleg(dp
);
6854 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
6858 struct nfs4_client
*clp
;
6859 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6861 LIST_HEAD(reaplist
);
6863 if (!nfsd_netns_ready(nn
))
6866 spin_lock(&nn
->client_lock
);
6867 clp
= nfsd_find_client(addr
, addr_size
);
6869 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6870 spin_unlock(&nn
->client_lock
);
6872 nfsd_recall_delegations(&reaplist
);
6877 nfsd_inject_recall_delegations(u64 max
)
6880 struct nfs4_client
*clp
, *next
;
6881 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6883 LIST_HEAD(reaplist
);
6885 if (!nfsd_netns_ready(nn
))
6888 spin_lock(&nn
->client_lock
);
6889 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6890 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6891 if (max
!= 0 && ++count
>= max
)
6894 spin_unlock(&nn
->client_lock
);
6895 nfsd_recall_delegations(&reaplist
);
6898 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6901 * Since the lifetime of a delegation isn't limited to that of an open, a
6902 * client may quite reasonably hang on to a delegation as long as it has
6903 * the inode cached. This becomes an obvious problem the first time a
6904 * client's inode cache approaches the size of the server's total memory.
6906 * For now we avoid this problem by imposing a hard limit on the number
6907 * of delegations, which varies according to the server's memory size.
6910 set_max_delegations(void)
6913 * Allow at most 4 delegations per megabyte of RAM. Quick
6914 * estimates suggest that in the worst case (where every delegation
6915 * is for a different inode), a delegation could take about 1.5K,
6916 * giving a worst case usage of about 6% of memory.
6918 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
6921 static int nfs4_state_create_net(struct net
*net
)
6923 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6926 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6927 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6928 if (!nn
->conf_id_hashtbl
)
6930 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6931 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6932 if (!nn
->unconf_id_hashtbl
)
6934 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
6935 SESSION_HASH_SIZE
, GFP_KERNEL
);
6936 if (!nn
->sessionid_hashtbl
)
6939 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6940 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
6941 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
6943 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
6944 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
6945 nn
->conf_name_tree
= RB_ROOT
;
6946 nn
->unconf_name_tree
= RB_ROOT
;
6947 INIT_LIST_HEAD(&nn
->client_lru
);
6948 INIT_LIST_HEAD(&nn
->close_lru
);
6949 INIT_LIST_HEAD(&nn
->del_recall_lru
);
6950 spin_lock_init(&nn
->client_lock
);
6952 spin_lock_init(&nn
->blocked_locks_lock
);
6953 INIT_LIST_HEAD(&nn
->blocked_locks_lru
);
6955 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
6961 kfree(nn
->unconf_id_hashtbl
);
6963 kfree(nn
->conf_id_hashtbl
);
6969 nfs4_state_destroy_net(struct net
*net
)
6972 struct nfs4_client
*clp
= NULL
;
6973 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6975 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6976 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
6977 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6978 destroy_client(clp
);
6982 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6983 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
6984 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6985 destroy_client(clp
);
6989 kfree(nn
->sessionid_hashtbl
);
6990 kfree(nn
->unconf_id_hashtbl
);
6991 kfree(nn
->conf_id_hashtbl
);
6996 nfs4_state_start_net(struct net
*net
)
6998 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7001 ret
= nfs4_state_create_net(net
);
7004 nn
->boot_time
= get_seconds();
7005 nn
->grace_ended
= false;
7006 nn
->nfsd4_manager
.block_opens
= true;
7007 locks_start_grace(net
, &nn
->nfsd4_manager
);
7008 nfsd4_client_tracking_init(net
);
7009 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
7010 nn
->nfsd4_grace
, net
);
7011 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
7015 /* initialization to perform when the nfsd service is started: */
7018 nfs4_state_start(void)
7022 ret
= set_callback_cred();
7026 laundry_wq
= alloc_workqueue("%s", WQ_UNBOUND
, 0, "nfsd4");
7027 if (laundry_wq
== NULL
) {
7029 goto out_cleanup_cred
;
7031 ret
= nfsd4_create_callback_queue();
7033 goto out_free_laundry
;
7035 set_max_delegations();
7039 destroy_workqueue(laundry_wq
);
7041 cleanup_callback_cred();
7046 nfs4_state_shutdown_net(struct net
*net
)
7048 struct nfs4_delegation
*dp
= NULL
;
7049 struct list_head
*pos
, *next
, reaplist
;
7050 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
7051 struct nfsd4_blocked_lock
*nbl
;
7053 cancel_delayed_work_sync(&nn
->laundromat_work
);
7054 locks_end_grace(&nn
->nfsd4_manager
);
7056 INIT_LIST_HEAD(&reaplist
);
7057 spin_lock(&state_lock
);
7058 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
7059 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
7060 WARN_ON(!unhash_delegation_locked(dp
));
7061 list_add(&dp
->dl_recall_lru
, &reaplist
);
7063 spin_unlock(&state_lock
);
7064 list_for_each_safe(pos
, next
, &reaplist
) {
7065 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
7066 list_del_init(&dp
->dl_recall_lru
);
7067 put_clnt_odstate(dp
->dl_clnt_odstate
);
7068 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
7069 nfs4_put_stid(&dp
->dl_stid
);
7072 BUG_ON(!list_empty(&reaplist
));
7073 spin_lock(&nn
->blocked_locks_lock
);
7074 while (!list_empty(&nn
->blocked_locks_lru
)) {
7075 nbl
= list_first_entry(&nn
->blocked_locks_lru
,
7076 struct nfsd4_blocked_lock
, nbl_lru
);
7077 list_move(&nbl
->nbl_lru
, &reaplist
);
7078 list_del_init(&nbl
->nbl_list
);
7080 spin_unlock(&nn
->blocked_locks_lock
);
7082 while (!list_empty(&reaplist
)) {
7083 nbl
= list_first_entry(&nn
->blocked_locks_lru
,
7084 struct nfsd4_blocked_lock
, nbl_lru
);
7085 list_del_init(&nbl
->nbl_lru
);
7086 posix_unblock_lock(&nbl
->nbl_lock
);
7087 free_blocked_lock(nbl
);
7090 nfsd4_client_tracking_exit(net
);
7091 nfs4_state_destroy_net(net
);
7095 nfs4_state_shutdown(void)
7097 destroy_workqueue(laundry_wq
);
7098 nfsd4_destroy_callback_queue();
7099 cleanup_callback_cred();
7103 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
7105 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
7106 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
7110 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
7112 if (cstate
->minorversion
) {
7113 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
7114 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
7119 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
7121 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
7125 * functions to set current state id
7128 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
,
7129 union nfsd4_op_u
*u
)
7131 put_stateid(cstate
, &u
->open_downgrade
.od_stateid
);
7135 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
,
7136 union nfsd4_op_u
*u
)
7138 put_stateid(cstate
, &u
->open
.op_stateid
);
7142 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
,
7143 union nfsd4_op_u
*u
)
7145 put_stateid(cstate
, &u
->close
.cl_stateid
);
7149 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
,
7150 union nfsd4_op_u
*u
)
7152 put_stateid(cstate
, &u
->lock
.lk_resp_stateid
);
7156 * functions to consume current state id
7160 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
,
7161 union nfsd4_op_u
*u
)
7163 get_stateid(cstate
, &u
->open_downgrade
.od_stateid
);
7167 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
,
7168 union nfsd4_op_u
*u
)
7170 get_stateid(cstate
, &u
->delegreturn
.dr_stateid
);
7174 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
,
7175 union nfsd4_op_u
*u
)
7177 get_stateid(cstate
, &u
->free_stateid
.fr_stateid
);
7181 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
,
7182 union nfsd4_op_u
*u
)
7184 get_stateid(cstate
, &u
->setattr
.sa_stateid
);
7188 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
,
7189 union nfsd4_op_u
*u
)
7191 get_stateid(cstate
, &u
->close
.cl_stateid
);
7195 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
,
7196 union nfsd4_op_u
*u
)
7198 get_stateid(cstate
, &u
->locku
.lu_stateid
);
7202 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
,
7203 union nfsd4_op_u
*u
)
7205 get_stateid(cstate
, &u
->read
.rd_stateid
);
7209 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
,
7210 union nfsd4_op_u
*u
)
7212 get_stateid(cstate
, &u
->write
.wr_stateid
);