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
;
98 static void free_session(struct nfsd4_session
*);
100 static struct nfsd4_callback_ops nfsd4_cb_recall_ops
;
102 static bool is_session_dead(struct nfsd4_session
*ses
)
104 return ses
->se_flags
& NFS4_SESSION_DEAD
;
107 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
109 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
110 return nfserr_jukebox
;
111 ses
->se_flags
|= NFS4_SESSION_DEAD
;
115 static bool is_client_expired(struct nfs4_client
*clp
)
117 return clp
->cl_time
== 0;
120 static __be32
get_client_locked(struct nfs4_client
*clp
)
122 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
124 lockdep_assert_held(&nn
->client_lock
);
126 if (is_client_expired(clp
))
127 return nfserr_expired
;
128 atomic_inc(&clp
->cl_refcount
);
132 /* must be called under the client_lock */
134 renew_client_locked(struct nfs4_client
*clp
)
136 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
138 if (is_client_expired(clp
)) {
140 printk("%s: client (clientid %08x/%08x) already expired\n",
142 clp
->cl_clientid
.cl_boot
,
143 clp
->cl_clientid
.cl_id
);
147 dprintk("renewing client (clientid %08x/%08x)\n",
148 clp
->cl_clientid
.cl_boot
,
149 clp
->cl_clientid
.cl_id
);
150 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
151 clp
->cl_time
= get_seconds();
154 static void put_client_renew_locked(struct nfs4_client
*clp
)
156 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
158 lockdep_assert_held(&nn
->client_lock
);
160 if (!atomic_dec_and_test(&clp
->cl_refcount
))
162 if (!is_client_expired(clp
))
163 renew_client_locked(clp
);
166 static void put_client_renew(struct nfs4_client
*clp
)
168 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
170 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
172 if (!is_client_expired(clp
))
173 renew_client_locked(clp
);
174 spin_unlock(&nn
->client_lock
);
177 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
181 if (is_session_dead(ses
))
182 return nfserr_badsession
;
183 status
= get_client_locked(ses
->se_client
);
186 atomic_inc(&ses
->se_ref
);
190 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
192 struct nfs4_client
*clp
= ses
->se_client
;
193 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
195 lockdep_assert_held(&nn
->client_lock
);
197 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
199 put_client_renew_locked(clp
);
202 static void nfsd4_put_session(struct nfsd4_session
*ses
)
204 struct nfs4_client
*clp
= ses
->se_client
;
205 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
207 spin_lock(&nn
->client_lock
);
208 nfsd4_put_session_locked(ses
);
209 spin_unlock(&nn
->client_lock
);
212 static inline struct nfs4_stateowner
*
213 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
215 atomic_inc(&sop
->so_count
);
220 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
222 return (sop
->so_owner
.len
== owner
->len
) &&
223 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
226 static struct nfs4_openowner
*
227 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
228 struct nfs4_client
*clp
)
230 struct nfs4_stateowner
*so
;
232 lockdep_assert_held(&clp
->cl_lock
);
234 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
236 if (!so
->so_is_open_owner
)
238 if (same_owner_str(so
, &open
->op_owner
))
239 return openowner(nfs4_get_stateowner(so
));
244 static struct nfs4_openowner
*
245 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
246 struct nfs4_client
*clp
)
248 struct nfs4_openowner
*oo
;
250 spin_lock(&clp
->cl_lock
);
251 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
252 spin_unlock(&clp
->cl_lock
);
257 opaque_hashval(const void *ptr
, int nbytes
)
259 unsigned char *cptr
= (unsigned char *) ptr
;
269 static void nfsd4_free_file_rcu(struct rcu_head
*rcu
)
271 struct nfs4_file
*fp
= container_of(rcu
, struct nfs4_file
, fi_rcu
);
273 kmem_cache_free(file_slab
, fp
);
277 put_nfs4_file(struct nfs4_file
*fi
)
279 might_lock(&state_lock
);
281 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
282 hlist_del_rcu(&fi
->fi_hash
);
283 spin_unlock(&state_lock
);
284 WARN_ON_ONCE(!list_empty(&fi
->fi_delegations
));
285 call_rcu(&fi
->fi_rcu
, nfsd4_free_file_rcu
);
290 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
292 if (f
->fi_fds
[oflag
])
293 return get_file(f
->fi_fds
[oflag
]);
298 find_writeable_file_locked(struct nfs4_file
*f
)
302 lockdep_assert_held(&f
->fi_lock
);
304 ret
= __nfs4_get_fd(f
, O_WRONLY
);
306 ret
= __nfs4_get_fd(f
, O_RDWR
);
311 find_writeable_file(struct nfs4_file
*f
)
315 spin_lock(&f
->fi_lock
);
316 ret
= find_writeable_file_locked(f
);
317 spin_unlock(&f
->fi_lock
);
322 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
326 lockdep_assert_held(&f
->fi_lock
);
328 ret
= __nfs4_get_fd(f
, O_RDONLY
);
330 ret
= __nfs4_get_fd(f
, O_RDWR
);
335 find_readable_file(struct nfs4_file
*f
)
339 spin_lock(&f
->fi_lock
);
340 ret
= find_readable_file_locked(f
);
341 spin_unlock(&f
->fi_lock
);
347 find_any_file(struct nfs4_file
*f
)
351 spin_lock(&f
->fi_lock
);
352 ret
= __nfs4_get_fd(f
, O_RDWR
);
354 ret
= __nfs4_get_fd(f
, O_WRONLY
);
356 ret
= __nfs4_get_fd(f
, O_RDONLY
);
358 spin_unlock(&f
->fi_lock
);
362 static atomic_long_t num_delegations
;
363 unsigned long max_delegations
;
366 * Open owner state (share locks)
369 /* hash tables for lock and open owners */
370 #define OWNER_HASH_BITS 8
371 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
372 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
374 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
378 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
379 return ret
& OWNER_HASH_MASK
;
382 /* hash table for nfs4_file */
383 #define FILE_HASH_BITS 8
384 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
386 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
388 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
391 static unsigned int file_hashval(struct knfsd_fh
*fh
)
393 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
396 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
399 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
401 lockdep_assert_held(&fp
->fi_lock
);
403 if (access
& NFS4_SHARE_ACCESS_WRITE
)
404 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
405 if (access
& NFS4_SHARE_ACCESS_READ
)
406 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
410 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
412 lockdep_assert_held(&fp
->fi_lock
);
414 /* Does this access mode make sense? */
415 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
418 /* Does it conflict with a deny mode already set? */
419 if ((access
& fp
->fi_share_deny
) != 0)
420 return nfserr_share_denied
;
422 __nfs4_file_get_access(fp
, access
);
426 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
428 /* Common case is that there is no deny mode. */
430 /* Does this deny mode make sense? */
431 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
434 if ((deny
& NFS4_SHARE_DENY_READ
) &&
435 atomic_read(&fp
->fi_access
[O_RDONLY
]))
436 return nfserr_share_denied
;
438 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
439 atomic_read(&fp
->fi_access
[O_WRONLY
]))
440 return nfserr_share_denied
;
445 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
447 might_lock(&fp
->fi_lock
);
449 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
450 struct file
*f1
= NULL
;
451 struct file
*f2
= NULL
;
453 swap(f1
, fp
->fi_fds
[oflag
]);
454 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
455 swap(f2
, fp
->fi_fds
[O_RDWR
]);
456 spin_unlock(&fp
->fi_lock
);
464 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
466 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
468 if (access
& NFS4_SHARE_ACCESS_WRITE
)
469 __nfs4_file_put_access(fp
, O_WRONLY
);
470 if (access
& NFS4_SHARE_ACCESS_READ
)
471 __nfs4_file_put_access(fp
, O_RDONLY
);
474 struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
,
475 struct kmem_cache
*slab
)
477 struct nfs4_stid
*stid
;
480 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
484 idr_preload(GFP_KERNEL
);
485 spin_lock(&cl
->cl_lock
);
486 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
487 spin_unlock(&cl
->cl_lock
);
491 stid
->sc_client
= cl
;
492 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
493 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
494 /* Will be incremented before return to client: */
495 atomic_set(&stid
->sc_count
, 1);
498 * It shouldn't be a problem to reuse an opaque stateid value.
499 * I don't think it is for 4.1. But with 4.0 I worry that, for
500 * example, a stray write retransmission could be accepted by
501 * the server when it should have been rejected. Therefore,
502 * adopt a trick from the sctp code to attempt to maximize the
503 * amount of time until an id is reused, by ensuring they always
504 * "increase" (mod INT_MAX):
508 kmem_cache_free(slab
, stid
);
512 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
514 struct nfs4_stid
*stid
;
515 struct nfs4_ol_stateid
*stp
;
517 stid
= nfs4_alloc_stid(clp
, stateid_slab
);
521 stp
= openlockstateid(stid
);
522 stp
->st_stid
.sc_free
= nfs4_free_ol_stateid
;
526 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
528 kmem_cache_free(deleg_slab
, stid
);
529 atomic_long_dec(&num_delegations
);
533 * When we recall a delegation, we should be careful not to hand it
534 * out again straight away.
535 * To ensure this we keep a pair of bloom filters ('new' and 'old')
536 * in which the filehandles of recalled delegations are "stored".
537 * If a filehandle appear in either filter, a delegation is blocked.
538 * When a delegation is recalled, the filehandle is stored in the "new"
540 * Every 30 seconds we swap the filters and clear the "new" one,
541 * unless both are empty of course.
543 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
544 * low 3 bytes as hash-table indices.
546 * 'blocked_delegations_lock', which is always taken in block_delegations(),
547 * is used to manage concurrent access. Testing does not need the lock
548 * except when swapping the two filters.
550 static DEFINE_SPINLOCK(blocked_delegations_lock
);
551 static struct bloom_pair
{
552 int entries
, old_entries
;
554 int new; /* index into 'set' */
555 DECLARE_BITMAP(set
[2], 256);
556 } blocked_delegations
;
558 static int delegation_blocked(struct knfsd_fh
*fh
)
561 struct bloom_pair
*bd
= &blocked_delegations
;
563 if (bd
->entries
== 0)
565 if (seconds_since_boot() - bd
->swap_time
> 30) {
566 spin_lock(&blocked_delegations_lock
);
567 if (seconds_since_boot() - bd
->swap_time
> 30) {
568 bd
->entries
-= bd
->old_entries
;
569 bd
->old_entries
= bd
->entries
;
570 memset(bd
->set
[bd
->new], 0,
573 bd
->swap_time
= seconds_since_boot();
575 spin_unlock(&blocked_delegations_lock
);
577 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
578 if (test_bit(hash
&255, bd
->set
[0]) &&
579 test_bit((hash
>>8)&255, bd
->set
[0]) &&
580 test_bit((hash
>>16)&255, bd
->set
[0]))
583 if (test_bit(hash
&255, bd
->set
[1]) &&
584 test_bit((hash
>>8)&255, bd
->set
[1]) &&
585 test_bit((hash
>>16)&255, bd
->set
[1]))
591 static void block_delegations(struct knfsd_fh
*fh
)
594 struct bloom_pair
*bd
= &blocked_delegations
;
596 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
598 spin_lock(&blocked_delegations_lock
);
599 __set_bit(hash
&255, bd
->set
[bd
->new]);
600 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
601 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
602 if (bd
->entries
== 0)
603 bd
->swap_time
= seconds_since_boot();
605 spin_unlock(&blocked_delegations_lock
);
608 static struct nfs4_delegation
*
609 alloc_init_deleg(struct nfs4_client
*clp
, struct svc_fh
*current_fh
)
611 struct nfs4_delegation
*dp
;
614 dprintk("NFSD alloc_init_deleg\n");
615 n
= atomic_long_inc_return(&num_delegations
);
616 if (n
< 0 || n
> max_delegations
)
618 if (delegation_blocked(¤t_fh
->fh_handle
))
620 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
624 dp
->dl_stid
.sc_free
= nfs4_free_deleg
;
626 * delegation seqid's are never incremented. The 4.1 special
627 * meaning of seqid 0 isn't meaningful, really, but let's avoid
628 * 0 anyway just for consistency and use 1:
630 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
631 INIT_LIST_HEAD(&dp
->dl_perfile
);
632 INIT_LIST_HEAD(&dp
->dl_perclnt
);
633 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
634 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
636 nfsd4_init_cb(&dp
->dl_recall
, dp
->dl_stid
.sc_client
,
637 &nfsd4_cb_recall_ops
, NFSPROC4_CLNT_CB_RECALL
);
640 atomic_long_dec(&num_delegations
);
645 nfs4_put_stid(struct nfs4_stid
*s
)
647 struct nfs4_file
*fp
= s
->sc_file
;
648 struct nfs4_client
*clp
= s
->sc_client
;
650 might_lock(&clp
->cl_lock
);
652 if (!atomic_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
653 wake_up_all(&close_wq
);
656 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
657 spin_unlock(&clp
->cl_lock
);
663 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
665 struct file
*filp
= NULL
;
667 spin_lock(&fp
->fi_lock
);
668 if (fp
->fi_deleg_file
&& --fp
->fi_delegees
== 0)
669 swap(filp
, fp
->fi_deleg_file
);
670 spin_unlock(&fp
->fi_lock
);
673 vfs_setlease(filp
, F_UNLCK
, NULL
, (void **)&fp
);
678 void nfs4_unhash_stid(struct nfs4_stid
*s
)
684 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
686 lockdep_assert_held(&state_lock
);
687 lockdep_assert_held(&fp
->fi_lock
);
689 atomic_inc(&dp
->dl_stid
.sc_count
);
690 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
691 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
692 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
696 unhash_delegation_locked(struct nfs4_delegation
*dp
)
698 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
700 lockdep_assert_held(&state_lock
);
702 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
703 /* Ensure that deleg break won't try to requeue it */
705 spin_lock(&fp
->fi_lock
);
706 list_del_init(&dp
->dl_perclnt
);
707 list_del_init(&dp
->dl_recall_lru
);
708 list_del_init(&dp
->dl_perfile
);
709 spin_unlock(&fp
->fi_lock
);
712 static void destroy_delegation(struct nfs4_delegation
*dp
)
714 spin_lock(&state_lock
);
715 unhash_delegation_locked(dp
);
716 spin_unlock(&state_lock
);
717 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
718 nfs4_put_stid(&dp
->dl_stid
);
721 static void revoke_delegation(struct nfs4_delegation
*dp
)
723 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
725 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
727 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
729 if (clp
->cl_minorversion
== 0)
730 nfs4_put_stid(&dp
->dl_stid
);
732 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
733 spin_lock(&clp
->cl_lock
);
734 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
735 spin_unlock(&clp
->cl_lock
);
743 static unsigned int clientid_hashval(u32 id
)
745 return id
& CLIENT_HASH_MASK
;
748 static unsigned int clientstr_hashval(const char *name
)
750 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
754 * We store the NONE, READ, WRITE, and BOTH bits separately in the
755 * st_{access,deny}_bmap field of the stateid, in order to track not
756 * only what share bits are currently in force, but also what
757 * combinations of share bits previous opens have used. This allows us
758 * to enforce the recommendation of rfc 3530 14.2.19 that the server
759 * return an error if the client attempt to downgrade to a combination
760 * of share bits not explicable by closing some of its previous opens.
762 * XXX: This enforcement is actually incomplete, since we don't keep
763 * track of access/deny bit combinations; so, e.g., we allow:
765 * OPEN allow read, deny write
766 * OPEN allow both, deny none
767 * DOWNGRADE allow read, deny none
769 * which we should reject.
772 bmap_to_share_mode(unsigned long bmap
) {
774 unsigned int access
= 0;
776 for (i
= 1; i
< 4; i
++) {
777 if (test_bit(i
, &bmap
))
783 /* set share access for a given stateid */
785 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
787 unsigned char mask
= 1 << access
;
789 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
790 stp
->st_access_bmap
|= mask
;
793 /* clear share access for a given stateid */
795 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
797 unsigned char mask
= 1 << access
;
799 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
800 stp
->st_access_bmap
&= ~mask
;
803 /* test whether a given stateid has access */
805 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
807 unsigned char mask
= 1 << access
;
809 return (bool)(stp
->st_access_bmap
& mask
);
812 /* set share deny for a given stateid */
814 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
816 unsigned char mask
= 1 << deny
;
818 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
819 stp
->st_deny_bmap
|= mask
;
822 /* clear share deny for a given stateid */
824 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
826 unsigned char mask
= 1 << deny
;
828 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
829 stp
->st_deny_bmap
&= ~mask
;
832 /* test whether a given stateid is denying specific access */
834 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
836 unsigned char mask
= 1 << deny
;
838 return (bool)(stp
->st_deny_bmap
& mask
);
841 static int nfs4_access_to_omode(u32 access
)
843 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
844 case NFS4_SHARE_ACCESS_READ
:
846 case NFS4_SHARE_ACCESS_WRITE
:
848 case NFS4_SHARE_ACCESS_BOTH
:
856 * A stateid that had a deny mode associated with it is being released
857 * or downgraded. Recalculate the deny mode on the file.
860 recalculate_deny_mode(struct nfs4_file
*fp
)
862 struct nfs4_ol_stateid
*stp
;
864 spin_lock(&fp
->fi_lock
);
865 fp
->fi_share_deny
= 0;
866 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
867 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
868 spin_unlock(&fp
->fi_lock
);
872 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
877 for (i
= 1; i
< 4; i
++) {
878 if ((i
& deny
) != i
) {
884 /* Recalculate per-file deny mode if there was a change */
886 recalculate_deny_mode(stp
->st_stid
.sc_file
);
889 /* release all access and file references for a given stateid */
891 release_all_access(struct nfs4_ol_stateid
*stp
)
894 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
896 if (fp
&& stp
->st_deny_bmap
!= 0)
897 recalculate_deny_mode(fp
);
899 for (i
= 1; i
< 4; i
++) {
900 if (test_access(i
, stp
))
901 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
902 clear_access(i
, stp
);
906 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
908 struct nfs4_client
*clp
= sop
->so_client
;
910 might_lock(&clp
->cl_lock
);
912 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
914 sop
->so_ops
->so_unhash(sop
);
915 spin_unlock(&clp
->cl_lock
);
916 kfree(sop
->so_owner
.data
);
917 sop
->so_ops
->so_free(sop
);
920 static void unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
922 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
924 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
926 spin_lock(&fp
->fi_lock
);
927 list_del(&stp
->st_perfile
);
928 spin_unlock(&fp
->fi_lock
);
929 list_del(&stp
->st_perstateowner
);
932 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
934 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
936 release_all_access(stp
);
937 if (stp
->st_stateowner
)
938 nfs4_put_stateowner(stp
->st_stateowner
);
939 kmem_cache_free(stateid_slab
, stid
);
942 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
944 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
945 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
948 file
= find_any_file(stp
->st_stid
.sc_file
);
950 filp_close(file
, (fl_owner_t
)lo
);
951 nfs4_free_ol_stateid(stid
);
955 * Put the persistent reference to an already unhashed generic stateid, while
956 * holding the cl_lock. If it's the last reference, then put it onto the
957 * reaplist for later destruction.
959 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
960 struct list_head
*reaplist
)
962 struct nfs4_stid
*s
= &stp
->st_stid
;
963 struct nfs4_client
*clp
= s
->sc_client
;
965 lockdep_assert_held(&clp
->cl_lock
);
967 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
969 if (!atomic_dec_and_test(&s
->sc_count
)) {
970 wake_up_all(&close_wq
);
974 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
975 list_add(&stp
->st_locks
, reaplist
);
978 static void unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
980 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
982 lockdep_assert_held(&oo
->oo_owner
.so_client
->cl_lock
);
984 list_del_init(&stp
->st_locks
);
985 unhash_ol_stateid(stp
);
986 nfs4_unhash_stid(&stp
->st_stid
);
989 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
991 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
993 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
994 unhash_lock_stateid(stp
);
995 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
996 nfs4_put_stid(&stp
->st_stid
);
999 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1001 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1003 lockdep_assert_held(&clp
->cl_lock
);
1005 list_del_init(&lo
->lo_owner
.so_strhash
);
1009 * Free a list of generic stateids that were collected earlier after being
1013 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1015 struct nfs4_ol_stateid
*stp
;
1016 struct nfs4_file
*fp
;
1020 while (!list_empty(reaplist
)) {
1021 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1023 list_del(&stp
->st_locks
);
1024 fp
= stp
->st_stid
.sc_file
;
1025 stp
->st_stid
.sc_free(&stp
->st_stid
);
1031 static void release_lockowner(struct nfs4_lockowner
*lo
)
1033 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1034 struct nfs4_ol_stateid
*stp
;
1035 struct list_head reaplist
;
1037 INIT_LIST_HEAD(&reaplist
);
1039 spin_lock(&clp
->cl_lock
);
1040 unhash_lockowner_locked(lo
);
1041 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
1042 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
1043 struct nfs4_ol_stateid
, st_perstateowner
);
1044 unhash_lock_stateid(stp
);
1045 put_ol_stateid_locked(stp
, &reaplist
);
1047 spin_unlock(&clp
->cl_lock
);
1048 free_ol_stateid_reaplist(&reaplist
);
1049 nfs4_put_stateowner(&lo
->lo_owner
);
1052 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1053 struct list_head
*reaplist
)
1055 struct nfs4_ol_stateid
*stp
;
1057 while (!list_empty(&open_stp
->st_locks
)) {
1058 stp
= list_entry(open_stp
->st_locks
.next
,
1059 struct nfs4_ol_stateid
, st_locks
);
1060 unhash_lock_stateid(stp
);
1061 put_ol_stateid_locked(stp
, reaplist
);
1065 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1066 struct list_head
*reaplist
)
1068 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1070 unhash_ol_stateid(stp
);
1071 release_open_stateid_locks(stp
, reaplist
);
1074 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1076 LIST_HEAD(reaplist
);
1078 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1079 unhash_open_stateid(stp
, &reaplist
);
1080 put_ol_stateid_locked(stp
, &reaplist
);
1081 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1082 free_ol_stateid_reaplist(&reaplist
);
1085 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1087 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1089 lockdep_assert_held(&clp
->cl_lock
);
1091 list_del_init(&oo
->oo_owner
.so_strhash
);
1092 list_del_init(&oo
->oo_perclient
);
1095 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1097 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1099 struct nfs4_ol_stateid
*s
;
1101 spin_lock(&nn
->client_lock
);
1102 s
= oo
->oo_last_closed_stid
;
1104 list_del_init(&oo
->oo_close_lru
);
1105 oo
->oo_last_closed_stid
= NULL
;
1107 spin_unlock(&nn
->client_lock
);
1109 nfs4_put_stid(&s
->st_stid
);
1112 static void release_openowner(struct nfs4_openowner
*oo
)
1114 struct nfs4_ol_stateid
*stp
;
1115 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1116 struct list_head reaplist
;
1118 INIT_LIST_HEAD(&reaplist
);
1120 spin_lock(&clp
->cl_lock
);
1121 unhash_openowner_locked(oo
);
1122 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1123 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1124 struct nfs4_ol_stateid
, st_perstateowner
);
1125 unhash_open_stateid(stp
, &reaplist
);
1126 put_ol_stateid_locked(stp
, &reaplist
);
1128 spin_unlock(&clp
->cl_lock
);
1129 free_ol_stateid_reaplist(&reaplist
);
1130 release_last_closed_stateid(oo
);
1131 nfs4_put_stateowner(&oo
->oo_owner
);
1135 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1137 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1139 return sid
->sequence
% SESSION_HASH_SIZE
;
1144 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1146 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1147 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1151 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1157 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1158 * won't be used for replay.
1160 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1162 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1164 if (nfserr
== nfserr_replay_me
)
1167 if (!seqid_mutating_err(ntohl(nfserr
))) {
1168 nfsd4_cstate_clear_replay(cstate
);
1173 if (so
->so_is_open_owner
)
1174 release_last_closed_stateid(openowner(so
));
1180 gen_sessionid(struct nfsd4_session
*ses
)
1182 struct nfs4_client
*clp
= ses
->se_client
;
1183 struct nfsd4_sessionid
*sid
;
1185 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1186 sid
->clientid
= clp
->cl_clientid
;
1187 sid
->sequence
= current_sessionid
++;
1192 * The protocol defines ca_maxresponssize_cached to include the size of
1193 * the rpc header, but all we need to cache is the data starting after
1194 * the end of the initial SEQUENCE operation--the rest we regenerate
1195 * each time. Therefore we can advertise a ca_maxresponssize_cached
1196 * value that is the number of bytes in our cache plus a few additional
1197 * bytes. In order to stay on the safe side, and not promise more than
1198 * we can cache, those additional bytes must be the minimum possible: 24
1199 * bytes of rpc header (xid through accept state, with AUTH_NULL
1200 * verifier), 12 for the compound header (with zero-length tag), and 44
1201 * for the SEQUENCE op response:
1203 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1206 free_session_slots(struct nfsd4_session
*ses
)
1210 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
1211 kfree(ses
->se_slots
[i
]);
1215 * We don't actually need to cache the rpc and session headers, so we
1216 * can allocate a little less for each slot:
1218 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1222 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1225 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1226 return size
+ sizeof(struct nfsd4_slot
);
1230 * XXX: If we run out of reserved DRC memory we could (up to a point)
1231 * re-negotiate active sessions and reduce their slot usage to make
1232 * room for new connections. For now we just fail the create session.
1234 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1236 u32 slotsize
= slot_bytes(ca
);
1237 u32 num
= ca
->maxreqs
;
1240 spin_lock(&nfsd_drc_lock
);
1241 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1242 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1243 num
= min_t(int, num
, avail
/ slotsize
);
1244 nfsd_drc_mem_used
+= num
* slotsize
;
1245 spin_unlock(&nfsd_drc_lock
);
1250 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1252 int slotsize
= slot_bytes(ca
);
1254 spin_lock(&nfsd_drc_lock
);
1255 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1256 spin_unlock(&nfsd_drc_lock
);
1259 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1260 struct nfsd4_channel_attrs
*battrs
)
1262 int numslots
= fattrs
->maxreqs
;
1263 int slotsize
= slot_bytes(fattrs
);
1264 struct nfsd4_session
*new;
1267 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1268 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1269 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1271 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1274 /* allocate each struct nfsd4_slot and data cache in one piece */
1275 for (i
= 0; i
< numslots
; i
++) {
1276 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1277 if (!new->se_slots
[i
])
1281 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1282 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1287 kfree(new->se_slots
[i
]);
1292 static void free_conn(struct nfsd4_conn
*c
)
1294 svc_xprt_put(c
->cn_xprt
);
1298 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1300 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1301 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1303 spin_lock(&clp
->cl_lock
);
1304 if (!list_empty(&c
->cn_persession
)) {
1305 list_del(&c
->cn_persession
);
1308 nfsd4_probe_callback(clp
);
1309 spin_unlock(&clp
->cl_lock
);
1312 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1314 struct nfsd4_conn
*conn
;
1316 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1319 svc_xprt_get(rqstp
->rq_xprt
);
1320 conn
->cn_xprt
= rqstp
->rq_xprt
;
1321 conn
->cn_flags
= flags
;
1322 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1326 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1328 conn
->cn_session
= ses
;
1329 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1332 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1334 struct nfs4_client
*clp
= ses
->se_client
;
1336 spin_lock(&clp
->cl_lock
);
1337 __nfsd4_hash_conn(conn
, ses
);
1338 spin_unlock(&clp
->cl_lock
);
1341 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1343 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1344 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1347 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1351 nfsd4_hash_conn(conn
, ses
);
1352 ret
= nfsd4_register_conn(conn
);
1354 /* oops; xprt is already down: */
1355 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1356 /* We may have gained or lost a callback channel: */
1357 nfsd4_probe_callback_sync(ses
->se_client
);
1360 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1362 u32 dir
= NFS4_CDFC4_FORE
;
1364 if (cses
->flags
& SESSION4_BACK_CHAN
)
1365 dir
|= NFS4_CDFC4_BACK
;
1366 return alloc_conn(rqstp
, dir
);
1369 /* must be called under client_lock */
1370 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1372 struct nfs4_client
*clp
= s
->se_client
;
1373 struct nfsd4_conn
*c
;
1375 spin_lock(&clp
->cl_lock
);
1376 while (!list_empty(&s
->se_conns
)) {
1377 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1378 list_del_init(&c
->cn_persession
);
1379 spin_unlock(&clp
->cl_lock
);
1381 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1384 spin_lock(&clp
->cl_lock
);
1386 spin_unlock(&clp
->cl_lock
);
1389 static void __free_session(struct nfsd4_session
*ses
)
1391 free_session_slots(ses
);
1395 static void free_session(struct nfsd4_session
*ses
)
1397 nfsd4_del_conns(ses
);
1398 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1399 __free_session(ses
);
1402 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1405 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1407 new->se_client
= clp
;
1410 INIT_LIST_HEAD(&new->se_conns
);
1412 new->se_cb_seq_nr
= 1;
1413 new->se_flags
= cses
->flags
;
1414 new->se_cb_prog
= cses
->callback_prog
;
1415 new->se_cb_sec
= cses
->cb_sec
;
1416 atomic_set(&new->se_ref
, 0);
1417 idx
= hash_sessionid(&new->se_sessionid
);
1418 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1419 spin_lock(&clp
->cl_lock
);
1420 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1421 spin_unlock(&clp
->cl_lock
);
1424 struct sockaddr
*sa
= svc_addr(rqstp
);
1426 * This is a little silly; with sessions there's no real
1427 * use for the callback address. Use the peer address
1428 * as a reasonable default for now, but consider fixing
1429 * the rpc client not to require an address in the
1432 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1433 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1437 /* caller must hold client_lock */
1438 static struct nfsd4_session
*
1439 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1441 struct nfsd4_session
*elem
;
1443 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1445 lockdep_assert_held(&nn
->client_lock
);
1447 dump_sessionid(__func__
, sessionid
);
1448 idx
= hash_sessionid(sessionid
);
1449 /* Search in the appropriate list */
1450 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1451 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1452 NFS4_MAX_SESSIONID_LEN
)) {
1457 dprintk("%s: session not found\n", __func__
);
1461 static struct nfsd4_session
*
1462 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1465 struct nfsd4_session
*session
;
1466 __be32 status
= nfserr_badsession
;
1468 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1471 status
= nfsd4_get_session_locked(session
);
1479 /* caller must hold client_lock */
1481 unhash_session(struct nfsd4_session
*ses
)
1483 struct nfs4_client
*clp
= ses
->se_client
;
1484 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1486 lockdep_assert_held(&nn
->client_lock
);
1488 list_del(&ses
->se_hash
);
1489 spin_lock(&ses
->se_client
->cl_lock
);
1490 list_del(&ses
->se_perclnt
);
1491 spin_unlock(&ses
->se_client
->cl_lock
);
1494 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1496 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1499 * We're assuming the clid was not given out from a boot
1500 * precisely 2^32 (about 136 years) before this one. That seems
1501 * a safe assumption:
1503 if (clid
->cl_boot
== (u32
)nn
->boot_time
)
1505 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1506 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1511 * XXX Should we use a slab cache ?
1512 * This type of memory management is somewhat inefficient, but we use it
1513 * anyway since SETCLIENTID is not a common operation.
1515 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1517 struct nfs4_client
*clp
;
1520 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1523 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1524 if (clp
->cl_name
.data
== NULL
)
1526 clp
->cl_ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
1527 OWNER_HASH_SIZE
, GFP_KERNEL
);
1528 if (!clp
->cl_ownerstr_hashtbl
)
1529 goto err_no_hashtbl
;
1530 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1531 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1532 clp
->cl_name
.len
= name
.len
;
1533 INIT_LIST_HEAD(&clp
->cl_sessions
);
1534 idr_init(&clp
->cl_stateids
);
1535 atomic_set(&clp
->cl_refcount
, 0);
1536 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1537 INIT_LIST_HEAD(&clp
->cl_idhash
);
1538 INIT_LIST_HEAD(&clp
->cl_openowners
);
1539 INIT_LIST_HEAD(&clp
->cl_delegations
);
1540 INIT_LIST_HEAD(&clp
->cl_lru
);
1541 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1542 INIT_LIST_HEAD(&clp
->cl_revoked
);
1543 #ifdef CONFIG_NFSD_PNFS
1544 INIT_LIST_HEAD(&clp
->cl_lo_states
);
1546 spin_lock_init(&clp
->cl_lock
);
1547 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1550 kfree(clp
->cl_name
.data
);
1557 free_client(struct nfs4_client
*clp
)
1559 while (!list_empty(&clp
->cl_sessions
)) {
1560 struct nfsd4_session
*ses
;
1561 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1563 list_del(&ses
->se_perclnt
);
1564 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1567 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1568 free_svc_cred(&clp
->cl_cred
);
1569 kfree(clp
->cl_ownerstr_hashtbl
);
1570 kfree(clp
->cl_name
.data
);
1571 idr_destroy(&clp
->cl_stateids
);
1575 /* must be called under the client_lock */
1577 unhash_client_locked(struct nfs4_client
*clp
)
1579 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1580 struct nfsd4_session
*ses
;
1582 lockdep_assert_held(&nn
->client_lock
);
1584 /* Mark the client as expired! */
1586 /* Make it invisible */
1587 if (!list_empty(&clp
->cl_idhash
)) {
1588 list_del_init(&clp
->cl_idhash
);
1589 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1590 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1592 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1594 list_del_init(&clp
->cl_lru
);
1595 spin_lock(&clp
->cl_lock
);
1596 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1597 list_del_init(&ses
->se_hash
);
1598 spin_unlock(&clp
->cl_lock
);
1602 unhash_client(struct nfs4_client
*clp
)
1604 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1606 spin_lock(&nn
->client_lock
);
1607 unhash_client_locked(clp
);
1608 spin_unlock(&nn
->client_lock
);
1611 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1613 if (atomic_read(&clp
->cl_refcount
))
1614 return nfserr_jukebox
;
1615 unhash_client_locked(clp
);
1620 __destroy_client(struct nfs4_client
*clp
)
1622 struct nfs4_openowner
*oo
;
1623 struct nfs4_delegation
*dp
;
1624 struct list_head reaplist
;
1626 INIT_LIST_HEAD(&reaplist
);
1627 spin_lock(&state_lock
);
1628 while (!list_empty(&clp
->cl_delegations
)) {
1629 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1630 unhash_delegation_locked(dp
);
1631 list_add(&dp
->dl_recall_lru
, &reaplist
);
1633 spin_unlock(&state_lock
);
1634 while (!list_empty(&reaplist
)) {
1635 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1636 list_del_init(&dp
->dl_recall_lru
);
1637 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
1638 nfs4_put_stid(&dp
->dl_stid
);
1640 while (!list_empty(&clp
->cl_revoked
)) {
1641 dp
= list_entry(clp
->cl_revoked
.next
, struct nfs4_delegation
, dl_recall_lru
);
1642 list_del_init(&dp
->dl_recall_lru
);
1643 nfs4_put_stid(&dp
->dl_stid
);
1645 while (!list_empty(&clp
->cl_openowners
)) {
1646 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1647 nfs4_get_stateowner(&oo
->oo_owner
);
1648 release_openowner(oo
);
1650 nfsd4_return_all_client_layouts(clp
);
1651 nfsd4_shutdown_callback(clp
);
1652 if (clp
->cl_cb_conn
.cb_xprt
)
1653 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1658 destroy_client(struct nfs4_client
*clp
)
1661 __destroy_client(clp
);
1664 static void expire_client(struct nfs4_client
*clp
)
1667 nfsd4_client_record_remove(clp
);
1668 __destroy_client(clp
);
1671 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1673 memcpy(target
->cl_verifier
.data
, source
->data
,
1674 sizeof(target
->cl_verifier
.data
));
1677 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1679 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1680 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1683 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1685 if (source
->cr_principal
) {
1686 target
->cr_principal
=
1687 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1688 if (target
->cr_principal
== NULL
)
1691 target
->cr_principal
= NULL
;
1692 target
->cr_flavor
= source
->cr_flavor
;
1693 target
->cr_uid
= source
->cr_uid
;
1694 target
->cr_gid
= source
->cr_gid
;
1695 target
->cr_group_info
= source
->cr_group_info
;
1696 get_group_info(target
->cr_group_info
);
1697 target
->cr_gss_mech
= source
->cr_gss_mech
;
1698 if (source
->cr_gss_mech
)
1699 gss_mech_get(source
->cr_gss_mech
);
1704 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1706 if (o1
->len
< o2
->len
)
1708 if (o1
->len
> o2
->len
)
1710 return memcmp(o1
->data
, o2
->data
, o1
->len
);
1713 static int same_name(const char *n1
, const char *n2
)
1715 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1719 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1721 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1725 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1727 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1730 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1734 if (g1
->ngroups
!= g2
->ngroups
)
1736 for (i
=0; i
<g1
->ngroups
; i
++)
1737 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1743 * RFC 3530 language requires clid_inuse be returned when the
1744 * "principal" associated with a requests differs from that previously
1745 * used. We use uid, gid's, and gss principal string as our best
1746 * approximation. We also don't want to allow non-gss use of a client
1747 * established using gss: in theory cr_principal should catch that
1748 * change, but in practice cr_principal can be null even in the gss case
1749 * since gssd doesn't always pass down a principal string.
1751 static bool is_gss_cred(struct svc_cred
*cr
)
1753 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1754 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1759 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1761 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1762 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1763 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1764 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1766 if (cr1
->cr_principal
== cr2
->cr_principal
)
1768 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1770 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1773 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1775 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1778 if (!cr
->cr_gss_mech
)
1780 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1781 return service
== RPC_GSS_SVC_INTEGRITY
||
1782 service
== RPC_GSS_SVC_PRIVACY
;
1785 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1787 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1789 if (!cl
->cl_mach_cred
)
1791 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1793 if (!svc_rqst_integrity_protected(rqstp
))
1795 if (!cr
->cr_principal
)
1797 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1800 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1805 * This is opaque to client, so no need to byte-swap. Use
1806 * __force to keep sparse happy
1808 verf
[0] = (__force __be32
)get_seconds();
1809 verf
[1] = (__force __be32
)nn
->clientid_counter
;
1810 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1813 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1815 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1816 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
1817 gen_confirm(clp
, nn
);
1820 static struct nfs4_stid
*
1821 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
1823 struct nfs4_stid
*ret
;
1825 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1826 if (!ret
|| !ret
->sc_type
)
1831 static struct nfs4_stid
*
1832 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1834 struct nfs4_stid
*s
;
1836 spin_lock(&cl
->cl_lock
);
1837 s
= find_stateid_locked(cl
, t
);
1839 if (typemask
& s
->sc_type
)
1840 atomic_inc(&s
->sc_count
);
1844 spin_unlock(&cl
->cl_lock
);
1848 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1849 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1851 struct nfs4_client
*clp
;
1852 struct sockaddr
*sa
= svc_addr(rqstp
);
1854 struct net
*net
= SVC_NET(rqstp
);
1856 clp
= alloc_client(name
);
1860 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1865 nfsd4_init_cb(&clp
->cl_cb_null
, clp
, NULL
, NFSPROC4_CLNT_CB_NULL
);
1866 clp
->cl_time
= get_seconds();
1867 clear_bit(0, &clp
->cl_cb_slot_busy
);
1868 copy_verf(clp
, verf
);
1869 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1870 clp
->cl_cb_session
= NULL
;
1876 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1878 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1879 struct nfs4_client
*clp
;
1882 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1885 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1886 new = &((*new)->rb_left
);
1888 new = &((*new)->rb_right
);
1891 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1892 rb_insert_color(&new_clp
->cl_namenode
, root
);
1895 static struct nfs4_client
*
1896 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1899 struct rb_node
*node
= root
->rb_node
;
1900 struct nfs4_client
*clp
;
1903 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1904 cmp
= compare_blob(&clp
->cl_name
, name
);
1906 node
= node
->rb_left
;
1908 node
= node
->rb_right
;
1916 add_to_unconfirmed(struct nfs4_client
*clp
)
1918 unsigned int idhashval
;
1919 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1921 lockdep_assert_held(&nn
->client_lock
);
1923 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1924 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1925 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1926 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1927 renew_client_locked(clp
);
1931 move_to_confirmed(struct nfs4_client
*clp
)
1933 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1934 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1936 lockdep_assert_held(&nn
->client_lock
);
1938 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1939 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1940 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1941 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1942 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1943 renew_client_locked(clp
);
1946 static struct nfs4_client
*
1947 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1949 struct nfs4_client
*clp
;
1950 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1952 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1953 if (same_clid(&clp
->cl_clientid
, clid
)) {
1954 if ((bool)clp
->cl_minorversion
!= sessions
)
1956 renew_client_locked(clp
);
1963 static struct nfs4_client
*
1964 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1966 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1968 lockdep_assert_held(&nn
->client_lock
);
1969 return find_client_in_id_table(tbl
, clid
, sessions
);
1972 static struct nfs4_client
*
1973 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1975 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1977 lockdep_assert_held(&nn
->client_lock
);
1978 return find_client_in_id_table(tbl
, clid
, sessions
);
1981 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1983 return clp
->cl_exchange_flags
!= 0;
1986 static struct nfs4_client
*
1987 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1989 lockdep_assert_held(&nn
->client_lock
);
1990 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1993 static struct nfs4_client
*
1994 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1996 lockdep_assert_held(&nn
->client_lock
);
1997 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2001 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2003 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2004 struct sockaddr
*sa
= svc_addr(rqstp
);
2005 u32 scopeid
= rpc_get_scope_id(sa
);
2006 unsigned short expected_family
;
2008 /* Currently, we only support tcp and tcp6 for the callback channel */
2009 if (se
->se_callback_netid_len
== 3 &&
2010 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2011 expected_family
= AF_INET
;
2012 else if (se
->se_callback_netid_len
== 4 &&
2013 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2014 expected_family
= AF_INET6
;
2018 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2019 se
->se_callback_addr_len
,
2020 (struct sockaddr
*)&conn
->cb_addr
,
2021 sizeof(conn
->cb_addr
));
2023 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2026 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2027 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2029 conn
->cb_prog
= se
->se_callback_prog
;
2030 conn
->cb_ident
= se
->se_callback_ident
;
2031 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2034 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2035 conn
->cb_addrlen
= 0;
2036 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
2037 "will not receive delegations\n",
2038 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2044 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2047 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2049 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2050 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2053 dprintk("--> %s slot %p\n", __func__
, slot
);
2055 slot
->sl_opcnt
= resp
->opcnt
;
2056 slot
->sl_status
= resp
->cstate
.status
;
2058 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2059 if (nfsd4_not_cached(resp
)) {
2060 slot
->sl_datalen
= 0;
2063 base
= resp
->cstate
.data_offset
;
2064 slot
->sl_datalen
= buf
->len
- base
;
2065 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2066 WARN("%s: sessions DRC could not cache compound\n", __func__
);
2071 * Encode the replay sequence operation from the slot values.
2072 * If cachethis is FALSE encode the uncached rep error on the next
2073 * operation which sets resp->p and increments resp->opcnt for
2074 * nfs4svc_encode_compoundres.
2078 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2079 struct nfsd4_compoundres
*resp
)
2081 struct nfsd4_op
*op
;
2082 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2084 /* Encode the replayed sequence operation */
2085 op
= &args
->ops
[resp
->opcnt
- 1];
2086 nfsd4_encode_operation(resp
, op
);
2088 /* Return nfserr_retry_uncached_rep in next operation. */
2089 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
2090 op
= &args
->ops
[resp
->opcnt
++];
2091 op
->status
= nfserr_retry_uncached_rep
;
2092 nfsd4_encode_operation(resp
, op
);
2098 * The sequence operation is not cached because we can use the slot and
2102 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2103 struct nfsd4_sequence
*seq
)
2105 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2106 struct xdr_stream
*xdr
= &resp
->xdr
;
2110 dprintk("--> %s slot %p\n", __func__
, slot
);
2112 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2116 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2119 return nfserr_serverfault
;
2121 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2122 xdr_commit_encode(xdr
);
2124 resp
->opcnt
= slot
->sl_opcnt
;
2125 return slot
->sl_status
;
2129 * Set the exchange_id flags returned by the server.
2132 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2134 #ifdef CONFIG_NFSD_PNFS
2135 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_PNFS_MDS
;
2137 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2140 /* Referrals are supported, Migration is not. */
2141 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2143 /* set the wire flags to return to client. */
2144 clid
->flags
= new->cl_exchange_flags
;
2147 static bool client_has_state(struct nfs4_client
*clp
)
2150 * Note clp->cl_openowners check isn't quite right: there's no
2151 * need to count owners without stateid's.
2153 * Also note we should probably be using this in 4.0 case too.
2155 return !list_empty(&clp
->cl_openowners
)
2156 || !list_empty(&clp
->cl_delegations
)
2157 || !list_empty(&clp
->cl_sessions
);
2161 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
2162 struct nfsd4_compound_state
*cstate
,
2163 struct nfsd4_exchange_id
*exid
)
2165 struct nfs4_client
*conf
, *new;
2166 struct nfs4_client
*unconf
= NULL
;
2168 char addr_str
[INET6_ADDRSTRLEN
];
2169 nfs4_verifier verf
= exid
->verifier
;
2170 struct sockaddr
*sa
= svc_addr(rqstp
);
2171 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2172 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2174 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2175 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2176 "ip_addr=%s flags %x, spa_how %d\n",
2177 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2178 addr_str
, exid
->flags
, exid
->spa_how
);
2180 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2181 return nfserr_inval
;
2183 switch (exid
->spa_how
) {
2185 if (!svc_rqst_integrity_protected(rqstp
))
2186 return nfserr_inval
;
2189 default: /* checked by xdr code */
2192 return nfserr_encr_alg_unsupp
;
2195 new = create_client(exid
->clname
, rqstp
, &verf
);
2197 return nfserr_jukebox
;
2199 /* Cases below refer to rfc 5661 section 18.35.4: */
2200 spin_lock(&nn
->client_lock
);
2201 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2203 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2204 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2207 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2208 status
= nfserr_inval
;
2211 if (!mach_creds_match(conf
, rqstp
)) {
2212 status
= nfserr_wrong_cred
;
2215 if (!creds_match
) { /* case 9 */
2216 status
= nfserr_perm
;
2219 if (!verfs_match
) { /* case 8 */
2220 status
= nfserr_not_same
;
2224 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2227 if (!creds_match
) { /* case 3 */
2228 if (client_has_state(conf
)) {
2229 status
= nfserr_clid_inuse
;
2234 if (verfs_match
) { /* case 2 */
2235 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2238 /* case 5, client reboot */
2243 if (update
) { /* case 7 */
2244 status
= nfserr_noent
;
2248 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2249 if (unconf
) /* case 4, possible retry or client restart */
2250 unhash_client_locked(unconf
);
2252 /* case 1 (normal case) */
2255 status
= mark_client_expired_locked(conf
);
2259 new->cl_minorversion
= cstate
->minorversion
;
2260 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
2263 add_to_unconfirmed(new);
2266 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2267 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2269 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2270 nfsd4_set_ex_flags(conf
, exid
);
2272 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2273 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2277 spin_unlock(&nn
->client_lock
);
2281 expire_client(unconf
);
2286 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2288 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2291 /* The slot is in use, and no response has been sent. */
2293 if (seqid
== slot_seqid
)
2294 return nfserr_jukebox
;
2296 return nfserr_seq_misordered
;
2298 /* Note unsigned 32-bit arithmetic handles wraparound: */
2299 if (likely(seqid
== slot_seqid
+ 1))
2301 if (seqid
== slot_seqid
)
2302 return nfserr_replay_cache
;
2303 return nfserr_seq_misordered
;
2307 * Cache the create session result into the create session single DRC
2308 * slot cache by saving the xdr structure. sl_seqid has been set.
2309 * Do this for solo or embedded create session operations.
2312 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2313 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2315 slot
->sl_status
= nfserr
;
2316 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2320 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2321 struct nfsd4_clid_slot
*slot
)
2323 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2324 return slot
->sl_status
;
2327 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2328 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2329 1 + /* MIN tag is length with zero, only length */ \
2330 3 + /* version, opcount, opcode */ \
2331 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2332 /* seqid, slotID, slotID, cache */ \
2333 4 ) * sizeof(__be32))
2335 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2336 2 + /* verifier: AUTH_NULL, length 0 */\
2338 1 + /* MIN tag is length with zero, only length */ \
2339 3 + /* opcount, opcode, opstatus*/ \
2340 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2341 /* seqid, slotID, slotID, slotID, status */ \
2342 5 ) * sizeof(__be32))
2344 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2346 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2348 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2349 return nfserr_toosmall
;
2350 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2351 return nfserr_toosmall
;
2352 ca
->headerpadsz
= 0;
2353 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2354 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2355 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2356 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2357 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2358 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2360 * Note decreasing slot size below client's request may make it
2361 * difficult for client to function correctly, whereas
2362 * decreasing the number of slots will (just?) affect
2363 * performance. When short on memory we therefore prefer to
2364 * decrease number of slots instead of their size. Clients that
2365 * request larger slots than they need will get poor results:
2367 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2369 return nfserr_jukebox
;
2374 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2375 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2376 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2377 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2379 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2381 ca
->headerpadsz
= 0;
2384 * These RPC_MAX_HEADER macros are overkill, especially since we
2385 * don't even do gss on the backchannel yet. But this is still
2386 * less than 1k. Tighten up this estimate in the unlikely event
2387 * it turns out to be a problem for some client:
2389 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2390 return nfserr_toosmall
;
2391 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2392 return nfserr_toosmall
;
2393 ca
->maxresp_cached
= 0;
2395 return nfserr_toosmall
;
2400 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2402 switch (cbs
->flavor
) {
2408 * GSS case: the spec doesn't allow us to return this
2409 * error. But it also doesn't allow us not to support
2411 * I'd rather this fail hard than return some error the
2412 * client might think it can already handle:
2414 return nfserr_encr_alg_unsupp
;
2419 nfsd4_create_session(struct svc_rqst
*rqstp
,
2420 struct nfsd4_compound_state
*cstate
,
2421 struct nfsd4_create_session
*cr_ses
)
2423 struct sockaddr
*sa
= svc_addr(rqstp
);
2424 struct nfs4_client
*conf
, *unconf
;
2425 struct nfs4_client
*old
= NULL
;
2426 struct nfsd4_session
*new;
2427 struct nfsd4_conn
*conn
;
2428 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2430 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2432 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2433 return nfserr_inval
;
2434 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2437 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2440 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2442 goto out_release_drc_mem
;
2443 status
= nfserr_jukebox
;
2444 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2446 goto out_release_drc_mem
;
2447 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2449 goto out_free_session
;
2451 spin_lock(&nn
->client_lock
);
2452 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2453 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2454 WARN_ON_ONCE(conf
&& unconf
);
2457 status
= nfserr_wrong_cred
;
2458 if (!mach_creds_match(conf
, rqstp
))
2460 cs_slot
= &conf
->cl_cs_slot
;
2461 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2462 if (status
== nfserr_replay_cache
) {
2463 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2465 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
2466 status
= nfserr_seq_misordered
;
2469 } else if (unconf
) {
2470 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2471 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2472 status
= nfserr_clid_inuse
;
2475 status
= nfserr_wrong_cred
;
2476 if (!mach_creds_match(unconf
, rqstp
))
2478 cs_slot
= &unconf
->cl_cs_slot
;
2479 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2481 /* an unconfirmed replay returns misordered */
2482 status
= nfserr_seq_misordered
;
2485 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2487 status
= mark_client_expired_locked(old
);
2493 move_to_confirmed(unconf
);
2496 status
= nfserr_stale_clientid
;
2501 * We do not support RDMA or persistent sessions
2503 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2504 cr_ses
->flags
&= ~SESSION4_RDMA
;
2506 init_session(rqstp
, new, conf
, cr_ses
);
2507 nfsd4_get_session_locked(new);
2509 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2510 NFS4_MAX_SESSIONID_LEN
);
2511 cs_slot
->sl_seqid
++;
2512 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2514 /* cache solo and embedded create sessions under the client_lock */
2515 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2516 spin_unlock(&nn
->client_lock
);
2517 /* init connection and backchannel */
2518 nfsd4_init_conn(rqstp
, conn
, new);
2519 nfsd4_put_session(new);
2524 spin_unlock(&nn
->client_lock
);
2529 __free_session(new);
2530 out_release_drc_mem
:
2531 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2535 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2538 case NFS4_CDFC4_FORE
:
2539 case NFS4_CDFC4_BACK
:
2541 case NFS4_CDFC4_FORE_OR_BOTH
:
2542 case NFS4_CDFC4_BACK_OR_BOTH
:
2543 *dir
= NFS4_CDFC4_BOTH
;
2546 return nfserr_inval
;
2549 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2551 struct nfsd4_session
*session
= cstate
->session
;
2552 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2555 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2558 spin_lock(&nn
->client_lock
);
2559 session
->se_cb_prog
= bc
->bc_cb_program
;
2560 session
->se_cb_sec
= bc
->bc_cb_sec
;
2561 spin_unlock(&nn
->client_lock
);
2563 nfsd4_probe_callback(session
->se_client
);
2568 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2569 struct nfsd4_compound_state
*cstate
,
2570 struct nfsd4_bind_conn_to_session
*bcts
)
2573 struct nfsd4_conn
*conn
;
2574 struct nfsd4_session
*session
;
2575 struct net
*net
= SVC_NET(rqstp
);
2576 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2578 if (!nfsd4_last_compound_op(rqstp
))
2579 return nfserr_not_only_op
;
2580 spin_lock(&nn
->client_lock
);
2581 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2582 spin_unlock(&nn
->client_lock
);
2584 goto out_no_session
;
2585 status
= nfserr_wrong_cred
;
2586 if (!mach_creds_match(session
->se_client
, rqstp
))
2588 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2591 conn
= alloc_conn(rqstp
, bcts
->dir
);
2592 status
= nfserr_jukebox
;
2595 nfsd4_init_conn(rqstp
, conn
, session
);
2598 nfsd4_put_session(session
);
2603 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2607 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2611 nfsd4_destroy_session(struct svc_rqst
*r
,
2612 struct nfsd4_compound_state
*cstate
,
2613 struct nfsd4_destroy_session
*sessionid
)
2615 struct nfsd4_session
*ses
;
2617 int ref_held_by_me
= 0;
2618 struct net
*net
= SVC_NET(r
);
2619 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2621 status
= nfserr_not_only_op
;
2622 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2623 if (!nfsd4_last_compound_op(r
))
2627 dump_sessionid(__func__
, &sessionid
->sessionid
);
2628 spin_lock(&nn
->client_lock
);
2629 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2631 goto out_client_lock
;
2632 status
= nfserr_wrong_cred
;
2633 if (!mach_creds_match(ses
->se_client
, r
))
2634 goto out_put_session
;
2635 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2637 goto out_put_session
;
2638 unhash_session(ses
);
2639 spin_unlock(&nn
->client_lock
);
2641 nfsd4_probe_callback_sync(ses
->se_client
);
2643 spin_lock(&nn
->client_lock
);
2646 nfsd4_put_session_locked(ses
);
2648 spin_unlock(&nn
->client_lock
);
2653 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2655 struct nfsd4_conn
*c
;
2657 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2658 if (c
->cn_xprt
== xpt
) {
2665 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2667 struct nfs4_client
*clp
= ses
->se_client
;
2668 struct nfsd4_conn
*c
;
2669 __be32 status
= nfs_ok
;
2672 spin_lock(&clp
->cl_lock
);
2673 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2676 status
= nfserr_conn_not_bound_to_session
;
2677 if (clp
->cl_mach_cred
)
2679 __nfsd4_hash_conn(new, ses
);
2680 spin_unlock(&clp
->cl_lock
);
2681 ret
= nfsd4_register_conn(new);
2683 /* oops; xprt is already down: */
2684 nfsd4_conn_lost(&new->cn_xpt_user
);
2687 spin_unlock(&clp
->cl_lock
);
2692 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2694 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2696 return args
->opcnt
> session
->se_fchannel
.maxops
;
2699 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2700 struct nfsd4_session
*session
)
2702 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2704 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2708 nfsd4_sequence(struct svc_rqst
*rqstp
,
2709 struct nfsd4_compound_state
*cstate
,
2710 struct nfsd4_sequence
*seq
)
2712 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2713 struct xdr_stream
*xdr
= &resp
->xdr
;
2714 struct nfsd4_session
*session
;
2715 struct nfs4_client
*clp
;
2716 struct nfsd4_slot
*slot
;
2717 struct nfsd4_conn
*conn
;
2720 struct net
*net
= SVC_NET(rqstp
);
2721 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2723 if (resp
->opcnt
!= 1)
2724 return nfserr_sequence_pos
;
2727 * Will be either used or freed by nfsd4_sequence_check_conn
2730 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2732 return nfserr_jukebox
;
2734 spin_lock(&nn
->client_lock
);
2735 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
2737 goto out_no_session
;
2738 clp
= session
->se_client
;
2740 status
= nfserr_too_many_ops
;
2741 if (nfsd4_session_too_many_ops(rqstp
, session
))
2742 goto out_put_session
;
2744 status
= nfserr_req_too_big
;
2745 if (nfsd4_request_too_big(rqstp
, session
))
2746 goto out_put_session
;
2748 status
= nfserr_badslot
;
2749 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2750 goto out_put_session
;
2752 slot
= session
->se_slots
[seq
->slotid
];
2753 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2755 /* We do not negotiate the number of slots yet, so set the
2756 * maxslots to the session maxreqs which is used to encode
2757 * sr_highest_slotid and the sr_target_slot id to maxslots */
2758 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2760 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2761 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2762 if (status
== nfserr_replay_cache
) {
2763 status
= nfserr_seq_misordered
;
2764 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2765 goto out_put_session
;
2766 cstate
->slot
= slot
;
2767 cstate
->session
= session
;
2769 /* Return the cached reply status and set cstate->status
2770 * for nfsd4_proc_compound processing */
2771 status
= nfsd4_replay_cache_entry(resp
, seq
);
2772 cstate
->status
= nfserr_replay_cache
;
2776 goto out_put_session
;
2778 status
= nfsd4_sequence_check_conn(conn
, session
);
2781 goto out_put_session
;
2783 buflen
= (seq
->cachethis
) ?
2784 session
->se_fchannel
.maxresp_cached
:
2785 session
->se_fchannel
.maxresp_sz
;
2786 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2788 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2789 goto out_put_session
;
2790 svc_reserve(rqstp
, buflen
);
2793 /* Success! bump slot seqid */
2794 slot
->sl_seqid
= seq
->seqid
;
2795 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2797 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2799 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2801 cstate
->slot
= slot
;
2802 cstate
->session
= session
;
2806 switch (clp
->cl_cb_state
) {
2808 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2810 case NFSD4_CB_FAULT
:
2811 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2814 seq
->status_flags
= 0;
2816 if (!list_empty(&clp
->cl_revoked
))
2817 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2821 spin_unlock(&nn
->client_lock
);
2824 nfsd4_put_session_locked(session
);
2825 goto out_no_session
;
2829 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
2831 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
2833 if (nfsd4_has_session(cs
)) {
2834 if (cs
->status
!= nfserr_replay_cache
) {
2835 nfsd4_store_cache_entry(resp
);
2836 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
2838 /* Drop session reference that was taken in nfsd4_sequence() */
2839 nfsd4_put_session(cs
->session
);
2841 put_client_renew(cs
->clp
);
2845 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2847 struct nfs4_client
*conf
, *unconf
;
2848 struct nfs4_client
*clp
= NULL
;
2850 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2852 spin_lock(&nn
->client_lock
);
2853 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2854 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2855 WARN_ON_ONCE(conf
&& unconf
);
2858 if (client_has_state(conf
)) {
2859 status
= nfserr_clientid_busy
;
2862 status
= mark_client_expired_locked(conf
);
2869 status
= nfserr_stale_clientid
;
2872 if (!mach_creds_match(clp
, rqstp
)) {
2874 status
= nfserr_wrong_cred
;
2877 unhash_client_locked(clp
);
2879 spin_unlock(&nn
->client_lock
);
2886 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2890 if (rc
->rca_one_fs
) {
2891 if (!cstate
->current_fh
.fh_dentry
)
2892 return nfserr_nofilehandle
;
2894 * We don't take advantage of the rca_one_fs case.
2895 * That's OK, it's optional, we can safely ignore it.
2900 status
= nfserr_complete_already
;
2901 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2902 &cstate
->session
->se_client
->cl_flags
))
2905 status
= nfserr_stale_clientid
;
2906 if (is_client_expired(cstate
->session
->se_client
))
2908 * The following error isn't really legal.
2909 * But we only get here if the client just explicitly
2910 * destroyed the client. Surely it no longer cares what
2911 * error it gets back on an operation for the dead
2917 nfsd4_client_record_create(cstate
->session
->se_client
);
2923 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2924 struct nfsd4_setclientid
*setclid
)
2926 struct xdr_netobj clname
= setclid
->se_name
;
2927 nfs4_verifier clverifier
= setclid
->se_verf
;
2928 struct nfs4_client
*conf
, *new;
2929 struct nfs4_client
*unconf
= NULL
;
2931 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2933 new = create_client(clname
, rqstp
, &clverifier
);
2935 return nfserr_jukebox
;
2936 /* Cases below refer to rfc 3530 section 14.2.33: */
2937 spin_lock(&nn
->client_lock
);
2938 conf
= find_confirmed_client_by_name(&clname
, nn
);
2941 status
= nfserr_clid_inuse
;
2942 if (clp_used_exchangeid(conf
))
2944 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2945 char addr_str
[INET6_ADDRSTRLEN
];
2946 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2948 dprintk("NFSD: setclientid: string in use by client "
2949 "at %s\n", addr_str
);
2953 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2955 unhash_client_locked(unconf
);
2956 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2957 /* case 1: probable callback update */
2958 copy_clid(new, conf
);
2959 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2961 new->cl_minorversion
= 0;
2962 gen_callback(new, setclid
, rqstp
);
2963 add_to_unconfirmed(new);
2964 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2965 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2966 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2970 spin_unlock(&nn
->client_lock
);
2974 expire_client(unconf
);
2980 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2981 struct nfsd4_compound_state
*cstate
,
2982 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2984 struct nfs4_client
*conf
, *unconf
;
2985 struct nfs4_client
*old
= NULL
;
2986 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2987 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2989 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2991 if (STALE_CLIENTID(clid
, nn
))
2992 return nfserr_stale_clientid
;
2994 spin_lock(&nn
->client_lock
);
2995 conf
= find_confirmed_client(clid
, false, nn
);
2996 unconf
= find_unconfirmed_client(clid
, false, nn
);
2998 * We try hard to give out unique clientid's, so if we get an
2999 * attempt to confirm the same clientid with a different cred,
3000 * there's a bug somewhere. Let's charitably assume it's our
3003 status
= nfserr_serverfault
;
3004 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3006 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3008 /* cases below refer to rfc 3530 section 14.2.34: */
3009 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3010 if (conf
&& !unconf
) /* case 2: probable retransmit */
3012 else /* case 4: client hasn't noticed we rebooted yet? */
3013 status
= nfserr_stale_clientid
;
3017 if (conf
) { /* case 1: callback update */
3019 unhash_client_locked(old
);
3020 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3021 } else { /* case 3: normal case; new or rebooted client */
3022 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3024 status
= mark_client_expired_locked(old
);
3030 move_to_confirmed(unconf
);
3033 get_client_locked(conf
);
3034 spin_unlock(&nn
->client_lock
);
3035 nfsd4_probe_callback(conf
);
3036 spin_lock(&nn
->client_lock
);
3037 put_client_renew_locked(conf
);
3039 spin_unlock(&nn
->client_lock
);
3045 static struct nfs4_file
*nfsd4_alloc_file(void)
3047 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3050 /* OPEN Share state helper functions */
3051 static void nfsd4_init_file(struct knfsd_fh
*fh
, unsigned int hashval
,
3052 struct nfs4_file
*fp
)
3054 lockdep_assert_held(&state_lock
);
3056 atomic_set(&fp
->fi_ref
, 1);
3057 spin_lock_init(&fp
->fi_lock
);
3058 INIT_LIST_HEAD(&fp
->fi_stateids
);
3059 INIT_LIST_HEAD(&fp
->fi_delegations
);
3060 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3061 fp
->fi_deleg_file
= NULL
;
3062 fp
->fi_had_conflict
= false;
3063 fp
->fi_share_deny
= 0;
3064 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3065 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3066 #ifdef CONFIG_NFSD_PNFS
3067 INIT_LIST_HEAD(&fp
->fi_lo_states
);
3068 atomic_set(&fp
->fi_lo_recalls
, 0);
3070 hlist_add_head_rcu(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3074 nfsd4_free_slabs(void)
3076 kmem_cache_destroy(openowner_slab
);
3077 kmem_cache_destroy(lockowner_slab
);
3078 kmem_cache_destroy(file_slab
);
3079 kmem_cache_destroy(stateid_slab
);
3080 kmem_cache_destroy(deleg_slab
);
3084 nfsd4_init_slabs(void)
3086 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3087 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3088 if (openowner_slab
== NULL
)
3090 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3091 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3092 if (lockowner_slab
== NULL
)
3093 goto out_free_openowner_slab
;
3094 file_slab
= kmem_cache_create("nfsd4_files",
3095 sizeof(struct nfs4_file
), 0, 0, NULL
);
3096 if (file_slab
== NULL
)
3097 goto out_free_lockowner_slab
;
3098 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3099 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3100 if (stateid_slab
== NULL
)
3101 goto out_free_file_slab
;
3102 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3103 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3104 if (deleg_slab
== NULL
)
3105 goto out_free_stateid_slab
;
3108 out_free_stateid_slab
:
3109 kmem_cache_destroy(stateid_slab
);
3111 kmem_cache_destroy(file_slab
);
3112 out_free_lockowner_slab
:
3113 kmem_cache_destroy(lockowner_slab
);
3114 out_free_openowner_slab
:
3115 kmem_cache_destroy(openowner_slab
);
3117 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3121 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3123 rp
->rp_status
= nfserr_serverfault
;
3125 rp
->rp_buf
= rp
->rp_ibuf
;
3126 mutex_init(&rp
->rp_mutex
);
3129 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3130 struct nfs4_stateowner
*so
)
3132 if (!nfsd4_has_session(cstate
)) {
3133 mutex_lock(&so
->so_replay
.rp_mutex
);
3134 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3138 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3140 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3143 cstate
->replay_owner
= NULL
;
3144 mutex_unlock(&so
->so_replay
.rp_mutex
);
3145 nfs4_put_stateowner(so
);
3149 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3151 struct nfs4_stateowner
*sop
;
3153 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3157 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3158 if (!sop
->so_owner
.data
) {
3159 kmem_cache_free(slab
, sop
);
3162 sop
->so_owner
.len
= owner
->len
;
3164 INIT_LIST_HEAD(&sop
->so_stateids
);
3165 sop
->so_client
= clp
;
3166 init_nfs4_replay(&sop
->so_replay
);
3167 atomic_set(&sop
->so_count
, 1);
3171 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3173 lockdep_assert_held(&clp
->cl_lock
);
3175 list_add(&oo
->oo_owner
.so_strhash
,
3176 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3177 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3180 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3182 unhash_openowner_locked(openowner(so
));
3185 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3187 struct nfs4_openowner
*oo
= openowner(so
);
3189 kmem_cache_free(openowner_slab
, oo
);
3192 static const struct nfs4_stateowner_operations openowner_ops
= {
3193 .so_unhash
= nfs4_unhash_openowner
,
3194 .so_free
= nfs4_free_openowner
,
3197 static struct nfs4_openowner
*
3198 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3199 struct nfsd4_compound_state
*cstate
)
3201 struct nfs4_client
*clp
= cstate
->clp
;
3202 struct nfs4_openowner
*oo
, *ret
;
3204 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3207 oo
->oo_owner
.so_ops
= &openowner_ops
;
3208 oo
->oo_owner
.so_is_open_owner
= 1;
3209 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3211 if (nfsd4_has_session(cstate
))
3212 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3214 oo
->oo_last_closed_stid
= NULL
;
3215 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3216 spin_lock(&clp
->cl_lock
);
3217 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3219 hash_openowner(oo
, clp
, strhashval
);
3222 nfs4_free_openowner(&oo
->oo_owner
);
3223 spin_unlock(&clp
->cl_lock
);
3227 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
3228 struct nfs4_openowner
*oo
= open
->op_openowner
;
3230 atomic_inc(&stp
->st_stid
.sc_count
);
3231 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3232 INIT_LIST_HEAD(&stp
->st_locks
);
3233 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3235 stp
->st_stid
.sc_file
= fp
;
3236 stp
->st_access_bmap
= 0;
3237 stp
->st_deny_bmap
= 0;
3238 stp
->st_openstp
= NULL
;
3239 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3240 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3241 spin_lock(&fp
->fi_lock
);
3242 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3243 spin_unlock(&fp
->fi_lock
);
3244 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3248 * In the 4.0 case we need to keep the owners around a little while to handle
3249 * CLOSE replay. We still do need to release any file access that is held by
3250 * them before returning however.
3253 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3255 struct nfs4_ol_stateid
*last
;
3256 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3257 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3260 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3263 * We know that we hold one reference via nfsd4_close, and another
3264 * "persistent" reference for the client. If the refcount is higher
3265 * than 2, then there are still calls in progress that are using this
3266 * stateid. We can't put the sc_file reference until they are finished.
3267 * Wait for the refcount to drop to 2. Since it has been unhashed,
3268 * there should be no danger of the refcount going back up again at
3271 wait_event(close_wq
, atomic_read(&s
->st_stid
.sc_count
) == 2);
3273 release_all_access(s
);
3274 if (s
->st_stid
.sc_file
) {
3275 put_nfs4_file(s
->st_stid
.sc_file
);
3276 s
->st_stid
.sc_file
= NULL
;
3279 spin_lock(&nn
->client_lock
);
3280 last
= oo
->oo_last_closed_stid
;
3281 oo
->oo_last_closed_stid
= s
;
3282 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3283 oo
->oo_time
= get_seconds();
3284 spin_unlock(&nn
->client_lock
);
3286 nfs4_put_stid(&last
->st_stid
);
3289 /* search file_hashtbl[] for file */
3290 static struct nfs4_file
*
3291 find_file_locked(struct knfsd_fh
*fh
, unsigned int hashval
)
3293 struct nfs4_file
*fp
;
3295 hlist_for_each_entry_rcu(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3296 if (fh_match(&fp
->fi_fhandle
, fh
)) {
3297 if (atomic_inc_not_zero(&fp
->fi_ref
))
3305 find_file(struct knfsd_fh
*fh
)
3307 struct nfs4_file
*fp
;
3308 unsigned int hashval
= file_hashval(fh
);
3311 fp
= find_file_locked(fh
, hashval
);
3316 static struct nfs4_file
*
3317 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3319 struct nfs4_file
*fp
;
3320 unsigned int hashval
= file_hashval(fh
);
3323 fp
= find_file_locked(fh
, hashval
);
3328 spin_lock(&state_lock
);
3329 fp
= find_file_locked(fh
, hashval
);
3330 if (likely(fp
== NULL
)) {
3331 nfsd4_init_file(fh
, hashval
, new);
3334 spin_unlock(&state_lock
);
3340 * Called to check deny when READ with all zero stateid or
3341 * WRITE with all zero or all one stateid
3344 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3346 struct nfs4_file
*fp
;
3347 __be32 ret
= nfs_ok
;
3349 fp
= find_file(¤t_fh
->fh_handle
);
3352 /* Check for conflicting share reservations */
3353 spin_lock(&fp
->fi_lock
);
3354 if (fp
->fi_share_deny
& deny_type
)
3355 ret
= nfserr_locked
;
3356 spin_unlock(&fp
->fi_lock
);
3361 static void nfsd4_cb_recall_prepare(struct nfsd4_callback
*cb
)
3363 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3364 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3367 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3370 * We can't do this in nfsd_break_deleg_cb because it is
3371 * already holding inode->i_lock.
3373 * If the dl_time != 0, then we know that it has already been
3374 * queued for a lease break. Don't queue it again.
3376 spin_lock(&state_lock
);
3377 if (dp
->dl_time
== 0) {
3378 dp
->dl_time
= get_seconds();
3379 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3381 spin_unlock(&state_lock
);
3384 static int nfsd4_cb_recall_done(struct nfsd4_callback
*cb
,
3385 struct rpc_task
*task
)
3387 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3389 switch (task
->tk_status
) {
3393 case -NFS4ERR_BAD_STATEID
:
3395 * Race: client probably got cb_recall before open reply
3396 * granting delegation.
3398 if (dp
->dl_retries
--) {
3399 rpc_delay(task
, 2 * HZ
);
3408 static void nfsd4_cb_recall_release(struct nfsd4_callback
*cb
)
3410 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3412 nfs4_put_stid(&dp
->dl_stid
);
3415 static struct nfsd4_callback_ops nfsd4_cb_recall_ops
= {
3416 .prepare
= nfsd4_cb_recall_prepare
,
3417 .done
= nfsd4_cb_recall_done
,
3418 .release
= nfsd4_cb_recall_release
,
3421 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3424 * We're assuming the state code never drops its reference
3425 * without first removing the lease. Since we're in this lease
3426 * callback (and since the lease code is serialized by the kernel
3427 * lock) we know the server hasn't removed the lease yet, we know
3428 * it's safe to take a reference.
3430 atomic_inc(&dp
->dl_stid
.sc_count
);
3431 nfsd4_run_cb(&dp
->dl_recall
);
3434 /* Called from break_lease() with i_lock held. */
3436 nfsd_break_deleg_cb(struct file_lock
*fl
)
3439 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
3440 struct nfs4_delegation
*dp
;
3443 WARN(1, "(%p)->fl_owner NULL\n", fl
);
3446 if (fp
->fi_had_conflict
) {
3447 WARN(1, "duplicate break on %p\n", fp
);
3451 * We don't want the locks code to timeout the lease for us;
3452 * we'll remove it ourself if a delegation isn't returned
3455 fl
->fl_break_time
= 0;
3457 spin_lock(&fp
->fi_lock
);
3458 fp
->fi_had_conflict
= true;
3460 * If there are no delegations on the list, then return true
3461 * so that the lease code will go ahead and delete it.
3463 if (list_empty(&fp
->fi_delegations
))
3466 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
3467 nfsd_break_one_deleg(dp
);
3468 spin_unlock(&fp
->fi_lock
);
3473 nfsd_change_deleg_cb(struct file_lock
*onlist
, int arg
,
3474 struct list_head
*dispose
)
3477 return lease_modify(onlist
, arg
, dispose
);
3482 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3483 .lm_break
= nfsd_break_deleg_cb
,
3484 .lm_change
= nfsd_change_deleg_cb
,
3487 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3489 if (nfsd4_has_session(cstate
))
3491 if (seqid
== so
->so_seqid
- 1)
3492 return nfserr_replay_me
;
3493 if (seqid
== so
->so_seqid
)
3495 return nfserr_bad_seqid
;
3498 static __be32
lookup_clientid(clientid_t
*clid
,
3499 struct nfsd4_compound_state
*cstate
,
3500 struct nfsd_net
*nn
)
3502 struct nfs4_client
*found
;
3505 found
= cstate
->clp
;
3506 if (!same_clid(&found
->cl_clientid
, clid
))
3507 return nfserr_stale_clientid
;
3511 if (STALE_CLIENTID(clid
, nn
))
3512 return nfserr_stale_clientid
;
3515 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3516 * cached already then we know this is for is for v4.0 and "sessions"
3519 WARN_ON_ONCE(cstate
->session
);
3520 spin_lock(&nn
->client_lock
);
3521 found
= find_confirmed_client(clid
, false, nn
);
3523 spin_unlock(&nn
->client_lock
);
3524 return nfserr_expired
;
3526 atomic_inc(&found
->cl_refcount
);
3527 spin_unlock(&nn
->client_lock
);
3529 /* Cache the nfs4_client in cstate! */
3530 cstate
->clp
= found
;
3535 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3536 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3538 clientid_t
*clientid
= &open
->op_clientid
;
3539 struct nfs4_client
*clp
= NULL
;
3540 unsigned int strhashval
;
3541 struct nfs4_openowner
*oo
= NULL
;
3544 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3545 return nfserr_stale_clientid
;
3547 * In case we need it later, after we've already created the
3548 * file and don't want to risk a further failure:
3550 open
->op_file
= nfsd4_alloc_file();
3551 if (open
->op_file
== NULL
)
3552 return nfserr_jukebox
;
3554 status
= lookup_clientid(clientid
, cstate
, nn
);
3559 strhashval
= ownerstr_hashval(&open
->op_owner
);
3560 oo
= find_openstateowner_str(strhashval
, open
, clp
);
3561 open
->op_openowner
= oo
;
3565 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3566 /* Replace unconfirmed owners without checking for replay. */
3567 release_openowner(oo
);
3568 open
->op_openowner
= NULL
;
3571 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3576 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3578 return nfserr_jukebox
;
3579 open
->op_openowner
= oo
;
3581 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
3583 return nfserr_jukebox
;
3587 static inline __be32
3588 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3590 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3591 return nfserr_openmode
;
3596 static int share_access_to_flags(u32 share_access
)
3598 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3601 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3603 struct nfs4_stid
*ret
;
3605 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3608 return delegstateid(ret
);
3611 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3613 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3614 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3618 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3619 struct nfs4_delegation
**dp
)
3622 __be32 status
= nfserr_bad_stateid
;
3623 struct nfs4_delegation
*deleg
;
3625 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3628 flags
= share_access_to_flags(open
->op_share_access
);
3629 status
= nfs4_check_delegmode(deleg
, flags
);
3631 nfs4_put_stid(&deleg
->dl_stid
);
3636 if (!nfsd4_is_deleg_cur(open
))
3640 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3644 static struct nfs4_ol_stateid
*
3645 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3647 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3648 struct nfs4_openowner
*oo
= open
->op_openowner
;
3650 spin_lock(&fp
->fi_lock
);
3651 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3652 /* ignore lock owners */
3653 if (local
->st_stateowner
->so_is_open_owner
== 0)
3655 if (local
->st_stateowner
== &oo
->oo_owner
) {
3657 atomic_inc(&ret
->st_stid
.sc_count
);
3661 spin_unlock(&fp
->fi_lock
);
3665 static inline int nfs4_access_to_access(u32 nfs4_access
)
3669 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3670 flags
|= NFSD_MAY_READ
;
3671 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3672 flags
|= NFSD_MAY_WRITE
;
3676 static inline __be32
3677 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3678 struct nfsd4_open
*open
)
3680 struct iattr iattr
= {
3681 .ia_valid
= ATTR_SIZE
,
3684 if (!open
->op_truncate
)
3686 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3687 return nfserr_inval
;
3688 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3691 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3692 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
3693 struct nfsd4_open
*open
)
3695 struct file
*filp
= NULL
;
3697 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3698 int access
= nfs4_access_to_access(open
->op_share_access
);
3699 unsigned char old_access_bmap
, old_deny_bmap
;
3701 spin_lock(&fp
->fi_lock
);
3704 * Are we trying to set a deny mode that would conflict with
3707 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3708 if (status
!= nfs_ok
) {
3709 spin_unlock(&fp
->fi_lock
);
3713 /* set access to the file */
3714 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
3715 if (status
!= nfs_ok
) {
3716 spin_unlock(&fp
->fi_lock
);
3720 /* Set access bits in stateid */
3721 old_access_bmap
= stp
->st_access_bmap
;
3722 set_access(open
->op_share_access
, stp
);
3724 /* Set new deny mask */
3725 old_deny_bmap
= stp
->st_deny_bmap
;
3726 set_deny(open
->op_share_deny
, stp
);
3727 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3729 if (!fp
->fi_fds
[oflag
]) {
3730 spin_unlock(&fp
->fi_lock
);
3731 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
3733 goto out_put_access
;
3734 spin_lock(&fp
->fi_lock
);
3735 if (!fp
->fi_fds
[oflag
]) {
3736 fp
->fi_fds
[oflag
] = filp
;
3740 spin_unlock(&fp
->fi_lock
);
3744 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3746 goto out_put_access
;
3750 stp
->st_access_bmap
= old_access_bmap
;
3751 nfs4_file_put_access(fp
, open
->op_share_access
);
3752 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
3757 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
)
3760 unsigned char old_deny_bmap
;
3762 if (!test_access(open
->op_share_access
, stp
))
3763 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
3765 /* test and set deny mode */
3766 spin_lock(&fp
->fi_lock
);
3767 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3768 if (status
== nfs_ok
) {
3769 old_deny_bmap
= stp
->st_deny_bmap
;
3770 set_deny(open
->op_share_deny
, stp
);
3771 fp
->fi_share_deny
|=
3772 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3774 spin_unlock(&fp
->fi_lock
);
3776 if (status
!= nfs_ok
)
3779 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3780 if (status
!= nfs_ok
)
3781 reset_union_bmap_deny(old_deny_bmap
, stp
);
3786 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3788 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3791 /* Should we give out recallable state?: */
3792 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3794 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3797 * In the sessions case, since we don't have to establish a
3798 * separate connection for callbacks, we assume it's OK
3799 * until we hear otherwise:
3801 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3804 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_file
*fp
, int flag
)
3806 struct file_lock
*fl
;
3808 fl
= locks_alloc_lock();
3811 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3812 fl
->fl_flags
= FL_DELEG
;
3813 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3814 fl
->fl_end
= OFFSET_MAX
;
3815 fl
->fl_owner
= (fl_owner_t
)fp
;
3816 fl
->fl_pid
= current
->tgid
;
3820 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3822 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
3823 struct file_lock
*fl
, *ret
;
3827 fl
= nfs4_alloc_init_lease(fp
, NFS4_OPEN_DELEGATE_READ
);
3830 filp
= find_readable_file(fp
);
3832 /* We should always have a readable file here */
3838 status
= vfs_setlease(filp
, fl
->fl_type
, &fl
, NULL
);
3840 locks_free_lock(fl
);
3843 spin_lock(&state_lock
);
3844 spin_lock(&fp
->fi_lock
);
3845 /* Did the lease get broken before we took the lock? */
3847 if (fp
->fi_had_conflict
)
3850 if (fp
->fi_deleg_file
) {
3853 hash_delegation_locked(dp
, fp
);
3856 fp
->fi_deleg_file
= filp
;
3857 fp
->fi_delegees
= 1;
3858 hash_delegation_locked(dp
, fp
);
3859 spin_unlock(&fp
->fi_lock
);
3860 spin_unlock(&state_lock
);
3863 spin_unlock(&fp
->fi_lock
);
3864 spin_unlock(&state_lock
);
3870 static struct nfs4_delegation
*
3871 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
3872 struct nfs4_file
*fp
)
3875 struct nfs4_delegation
*dp
;
3877 if (fp
->fi_had_conflict
)
3878 return ERR_PTR(-EAGAIN
);
3880 dp
= alloc_init_deleg(clp
, fh
);
3882 return ERR_PTR(-ENOMEM
);
3885 spin_lock(&state_lock
);
3886 spin_lock(&fp
->fi_lock
);
3887 dp
->dl_stid
.sc_file
= fp
;
3888 if (!fp
->fi_deleg_file
) {
3889 spin_unlock(&fp
->fi_lock
);
3890 spin_unlock(&state_lock
);
3891 status
= nfs4_setlease(dp
);
3894 if (fp
->fi_had_conflict
) {
3899 hash_delegation_locked(dp
, fp
);
3902 spin_unlock(&fp
->fi_lock
);
3903 spin_unlock(&state_lock
);
3906 nfs4_put_stid(&dp
->dl_stid
);
3907 return ERR_PTR(status
);
3912 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3914 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3915 if (status
== -EAGAIN
)
3916 open
->op_why_no_deleg
= WND4_CONTENTION
;
3918 open
->op_why_no_deleg
= WND4_RESOURCE
;
3919 switch (open
->op_deleg_want
) {
3920 case NFS4_SHARE_WANT_READ_DELEG
:
3921 case NFS4_SHARE_WANT_WRITE_DELEG
:
3922 case NFS4_SHARE_WANT_ANY_DELEG
:
3924 case NFS4_SHARE_WANT_CANCEL
:
3925 open
->op_why_no_deleg
= WND4_CANCELLED
;
3927 case NFS4_SHARE_WANT_NO_DELEG
:
3934 * Attempt to hand out a delegation.
3936 * Note we don't support write delegations, and won't until the vfs has
3937 * proper support for them.
3940 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
3941 struct nfs4_ol_stateid
*stp
)
3943 struct nfs4_delegation
*dp
;
3944 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
3945 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
3949 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3950 open
->op_recall
= 0;
3951 switch (open
->op_claim_type
) {
3952 case NFS4_OPEN_CLAIM_PREVIOUS
:
3954 open
->op_recall
= 1;
3955 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3958 case NFS4_OPEN_CLAIM_NULL
:
3959 case NFS4_OPEN_CLAIM_FH
:
3961 * Let's not give out any delegations till everyone's
3962 * had the chance to reclaim theirs....
3964 if (locks_in_grace(clp
->net
))
3966 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3969 * Also, if the file was opened for write or
3970 * create, there's a good chance the client's
3971 * about to write to it, resulting in an
3972 * immediate recall (since we don't support
3973 * write delegations):
3975 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3977 if (open
->op_create
== NFS4_OPEN_CREATE
)
3983 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
);
3987 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3989 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3990 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3991 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3992 nfs4_put_stid(&dp
->dl_stid
);
3995 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3996 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3997 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3998 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3999 open
->op_recall
= 1;
4002 /* 4.1 client asking for a delegation? */
4003 if (open
->op_deleg_want
)
4004 nfsd4_open_deleg_none_ext(open
, status
);
4008 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
4009 struct nfs4_delegation
*dp
)
4011 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
4012 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4013 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4014 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
4015 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
4016 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4017 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4018 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
4020 /* Otherwise the client must be confused wanting a delegation
4021 * it already has, therefore we don't return
4022 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4027 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
4029 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
4030 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
4031 struct nfs4_file
*fp
= NULL
;
4032 struct nfs4_ol_stateid
*stp
= NULL
;
4033 struct nfs4_delegation
*dp
= NULL
;
4037 * Lookup file; if found, lookup stateid and check open request,
4038 * and check for delegations in the process of being recalled.
4039 * If not found, create the nfs4_file struct
4041 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4042 if (fp
!= open
->op_file
) {
4043 status
= nfs4_check_deleg(cl
, open
, &dp
);
4046 stp
= nfsd4_find_existing_open(fp
, open
);
4048 open
->op_file
= NULL
;
4049 status
= nfserr_bad_stateid
;
4050 if (nfsd4_is_deleg_cur(open
))
4052 status
= nfserr_jukebox
;
4056 * OPEN the file, or upgrade an existing OPEN.
4057 * If truncate fails, the OPEN fails.
4060 /* Stateid was found, this is an OPEN upgrade */
4061 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4066 open
->op_stp
= NULL
;
4067 init_open_stateid(stp
, fp
, open
);
4068 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4070 release_open_stateid(stp
);
4074 update_stateid(&stp
->st_stid
.sc_stateid
);
4075 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4077 if (nfsd4_has_session(&resp
->cstate
)) {
4078 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4079 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4080 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4086 * Attempt to hand out a delegation. No error return, because the
4087 * OPEN succeeds even if we fail.
4089 nfs4_open_delegation(current_fh
, open
, stp
);
4093 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4094 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4096 /* 4.1 client trying to upgrade/downgrade delegation? */
4097 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4098 open
->op_deleg_want
)
4099 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4103 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4104 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
4106 * To finish the open response, we just need to set the rflags.
4108 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4109 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
4110 !nfsd4_has_session(&resp
->cstate
))
4111 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4113 nfs4_put_stid(&dp
->dl_stid
);
4115 nfs4_put_stid(&stp
->st_stid
);
4120 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4121 struct nfsd4_open
*open
, __be32 status
)
4123 if (open
->op_openowner
) {
4124 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4126 nfsd4_cstate_assign_replay(cstate
, so
);
4127 nfs4_put_stateowner(so
);
4130 kmem_cache_free(file_slab
, open
->op_file
);
4132 nfs4_put_stid(&open
->op_stp
->st_stid
);
4136 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4139 struct nfs4_client
*clp
;
4141 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4143 dprintk("process_renew(%08x/%08x): starting\n",
4144 clid
->cl_boot
, clid
->cl_id
);
4145 status
= lookup_clientid(clid
, cstate
, nn
);
4149 status
= nfserr_cb_path_down
;
4150 if (!list_empty(&clp
->cl_delegations
)
4151 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4159 nfsd4_end_grace(struct nfsd_net
*nn
)
4161 /* do nothing if grace period already ended */
4162 if (nn
->grace_ended
)
4165 dprintk("NFSD: end of grace period\n");
4166 nn
->grace_ended
= true;
4168 * If the server goes down again right now, an NFSv4
4169 * client will still be allowed to reclaim after it comes back up,
4170 * even if it hasn't yet had a chance to reclaim state this time.
4173 nfsd4_record_grace_done(nn
);
4175 * At this point, NFSv4 clients can still reclaim. But if the
4176 * server crashes, any that have not yet reclaimed will be out
4177 * of luck on the next boot.
4179 * (NFSv4.1+ clients are considered to have reclaimed once they
4180 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4181 * have reclaimed after their first OPEN.)
4183 locks_end_grace(&nn
->nfsd4_manager
);
4185 * At this point, and once lockd and/or any other containers
4186 * exit their grace period, further reclaims will fail and
4187 * regular locking can resume.
4192 nfs4_laundromat(struct nfsd_net
*nn
)
4194 struct nfs4_client
*clp
;
4195 struct nfs4_openowner
*oo
;
4196 struct nfs4_delegation
*dp
;
4197 struct nfs4_ol_stateid
*stp
;
4198 struct list_head
*pos
, *next
, reaplist
;
4199 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4200 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4202 dprintk("NFSD: laundromat service - starting\n");
4203 nfsd4_end_grace(nn
);
4204 INIT_LIST_HEAD(&reaplist
);
4205 spin_lock(&nn
->client_lock
);
4206 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4207 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4208 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4209 t
= clp
->cl_time
- cutoff
;
4210 new_timeo
= min(new_timeo
, t
);
4213 if (mark_client_expired_locked(clp
)) {
4214 dprintk("NFSD: client in use (clientid %08x)\n",
4215 clp
->cl_clientid
.cl_id
);
4218 list_add(&clp
->cl_lru
, &reaplist
);
4220 spin_unlock(&nn
->client_lock
);
4221 list_for_each_safe(pos
, next
, &reaplist
) {
4222 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4223 dprintk("NFSD: purging unused client (clientid %08x)\n",
4224 clp
->cl_clientid
.cl_id
);
4225 list_del_init(&clp
->cl_lru
);
4228 spin_lock(&state_lock
);
4229 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4230 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4231 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
4233 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4234 t
= dp
->dl_time
- cutoff
;
4235 new_timeo
= min(new_timeo
, t
);
4238 unhash_delegation_locked(dp
);
4239 list_add(&dp
->dl_recall_lru
, &reaplist
);
4241 spin_unlock(&state_lock
);
4242 while (!list_empty(&reaplist
)) {
4243 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4245 list_del_init(&dp
->dl_recall_lru
);
4246 revoke_delegation(dp
);
4249 spin_lock(&nn
->client_lock
);
4250 while (!list_empty(&nn
->close_lru
)) {
4251 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4253 if (time_after((unsigned long)oo
->oo_time
,
4254 (unsigned long)cutoff
)) {
4255 t
= oo
->oo_time
- cutoff
;
4256 new_timeo
= min(new_timeo
, t
);
4259 list_del_init(&oo
->oo_close_lru
);
4260 stp
= oo
->oo_last_closed_stid
;
4261 oo
->oo_last_closed_stid
= NULL
;
4262 spin_unlock(&nn
->client_lock
);
4263 nfs4_put_stid(&stp
->st_stid
);
4264 spin_lock(&nn
->client_lock
);
4266 spin_unlock(&nn
->client_lock
);
4268 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4272 static struct workqueue_struct
*laundry_wq
;
4273 static void laundromat_main(struct work_struct
*);
4276 laundromat_main(struct work_struct
*laundry
)
4279 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
4281 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4284 t
= nfs4_laundromat(nn
);
4285 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4286 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4289 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
4291 if (!fh_match(&fhp
->fh_handle
, &stp
->st_stid
.sc_file
->fi_fhandle
))
4292 return nfserr_bad_stateid
;
4297 access_permit_read(struct nfs4_ol_stateid
*stp
)
4299 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4300 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4301 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4305 access_permit_write(struct nfs4_ol_stateid
*stp
)
4307 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4308 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4312 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4314 __be32 status
= nfserr_openmode
;
4316 /* For lock stateid's, we test the parent open, not the lock: */
4317 if (stp
->st_openstp
)
4318 stp
= stp
->st_openstp
;
4319 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4321 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4328 static inline __be32
4329 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4331 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4333 else if (locks_in_grace(net
)) {
4334 /* Answer in remaining cases depends on existence of
4335 * conflicting state; so we must wait out the grace period. */
4336 return nfserr_grace
;
4337 } else if (flags
& WR_STATE
)
4338 return nfs4_share_conflict(current_fh
,
4339 NFS4_SHARE_DENY_WRITE
);
4340 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4341 return nfs4_share_conflict(current_fh
,
4342 NFS4_SHARE_DENY_READ
);
4346 * Allow READ/WRITE during grace period on recovered state only for files
4347 * that are not able to provide mandatory locking.
4350 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4352 return locks_in_grace(net
) && mandatory_lock(inode
);
4355 /* Returns true iff a is later than b: */
4356 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
4358 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
4361 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4364 * When sessions are used the stateid generation number is ignored
4367 if (has_session
&& in
->si_generation
== 0)
4370 if (in
->si_generation
== ref
->si_generation
)
4373 /* If the client sends us a stateid from the future, it's buggy: */
4374 if (stateid_generation_after(in
, ref
))
4375 return nfserr_bad_stateid
;
4377 * However, we could see a stateid from the past, even from a
4378 * non-buggy client. For example, if the client sends a lock
4379 * while some IO is outstanding, the lock may bump si_generation
4380 * while the IO is still in flight. The client could avoid that
4381 * situation by waiting for responses on all the IO requests,
4382 * but better performance may result in retrying IO that
4383 * receives an old_stateid error if requests are rarely
4384 * reordered in flight:
4386 return nfserr_old_stateid
;
4389 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4391 struct nfs4_stid
*s
;
4392 struct nfs4_ol_stateid
*ols
;
4393 __be32 status
= nfserr_bad_stateid
;
4395 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4397 /* Client debugging aid. */
4398 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4399 char addr_str
[INET6_ADDRSTRLEN
];
4400 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4402 pr_warn_ratelimited("NFSD: client %s testing state ID "
4403 "with incorrect client ID\n", addr_str
);
4406 spin_lock(&cl
->cl_lock
);
4407 s
= find_stateid_locked(cl
, stateid
);
4410 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4413 switch (s
->sc_type
) {
4414 case NFS4_DELEG_STID
:
4417 case NFS4_REVOKED_DELEG_STID
:
4418 status
= nfserr_deleg_revoked
;
4420 case NFS4_OPEN_STID
:
4421 case NFS4_LOCK_STID
:
4422 ols
= openlockstateid(s
);
4423 if (ols
->st_stateowner
->so_is_open_owner
4424 && !(openowner(ols
->st_stateowner
)->oo_flags
4425 & NFS4_OO_CONFIRMED
))
4426 status
= nfserr_bad_stateid
;
4431 printk("unknown stateid type %x\n", s
->sc_type
);
4433 case NFS4_CLOSED_STID
:
4434 case NFS4_CLOSED_DELEG_STID
:
4435 status
= nfserr_bad_stateid
;
4438 spin_unlock(&cl
->cl_lock
);
4443 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4444 stateid_t
*stateid
, unsigned char typemask
,
4445 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4449 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4450 return nfserr_bad_stateid
;
4451 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
4452 if (status
== nfserr_stale_clientid
) {
4453 if (cstate
->session
)
4454 return nfserr_bad_stateid
;
4455 return nfserr_stale_stateid
;
4459 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
4461 return nfserr_bad_stateid
;
4466 * Checks for stateid operations
4469 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
4470 stateid_t
*stateid
, int flags
, struct file
**filpp
)
4472 struct nfs4_stid
*s
;
4473 struct nfs4_ol_stateid
*stp
= NULL
;
4474 struct nfs4_delegation
*dp
= NULL
;
4475 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4476 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
4477 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4478 struct file
*file
= NULL
;
4484 if (grace_disallows_io(net
, ino
))
4485 return nfserr_grace
;
4487 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4488 return check_special_stateids(net
, current_fh
, stateid
, flags
);
4490 status
= nfsd4_lookup_stateid(cstate
, stateid
,
4491 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
4495 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
4498 switch (s
->sc_type
) {
4499 case NFS4_DELEG_STID
:
4500 dp
= delegstateid(s
);
4501 status
= nfs4_check_delegmode(dp
, flags
);
4505 file
= dp
->dl_stid
.sc_file
->fi_deleg_file
;
4508 status
= nfserr_serverfault
;
4514 case NFS4_OPEN_STID
:
4515 case NFS4_LOCK_STID
:
4516 stp
= openlockstateid(s
);
4517 status
= nfs4_check_fh(current_fh
, stp
);
4520 if (stp
->st_stateowner
->so_is_open_owner
4521 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4523 status
= nfs4_check_openmode(stp
, flags
);
4527 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
4529 if (flags
& RD_STATE
)
4530 file
= find_readable_file(fp
);
4532 file
= find_writeable_file(fp
);
4536 status
= nfserr_bad_stateid
;
4548 * Test if the stateid is valid
4551 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4552 struct nfsd4_test_stateid
*test_stateid
)
4554 struct nfsd4_test_stateid_id
*stateid
;
4555 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4557 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
4558 stateid
->ts_id_status
=
4559 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
4565 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4566 struct nfsd4_free_stateid
*free_stateid
)
4568 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
4569 struct nfs4_stid
*s
;
4570 struct nfs4_delegation
*dp
;
4571 struct nfs4_ol_stateid
*stp
;
4572 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4573 __be32 ret
= nfserr_bad_stateid
;
4575 spin_lock(&cl
->cl_lock
);
4576 s
= find_stateid_locked(cl
, stateid
);
4579 switch (s
->sc_type
) {
4580 case NFS4_DELEG_STID
:
4581 ret
= nfserr_locks_held
;
4583 case NFS4_OPEN_STID
:
4584 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4587 ret
= nfserr_locks_held
;
4589 case NFS4_LOCK_STID
:
4590 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4593 stp
= openlockstateid(s
);
4594 ret
= nfserr_locks_held
;
4595 if (check_for_locks(stp
->st_stid
.sc_file
,
4596 lockowner(stp
->st_stateowner
)))
4598 unhash_lock_stateid(stp
);
4599 spin_unlock(&cl
->cl_lock
);
4603 case NFS4_REVOKED_DELEG_STID
:
4604 dp
= delegstateid(s
);
4605 list_del_init(&dp
->dl_recall_lru
);
4606 spin_unlock(&cl
->cl_lock
);
4610 /* Default falls through and returns nfserr_bad_stateid */
4613 spin_unlock(&cl
->cl_lock
);
4621 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
4622 RD_STATE
: WR_STATE
;
4625 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
4627 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4628 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
4631 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
4634 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
4635 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
4637 * "Closed" stateid's exist *only* to return
4638 * nfserr_replay_me from the previous step, and
4639 * revoked delegations are kept only for free_stateid.
4641 return nfserr_bad_stateid
;
4642 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4645 return nfs4_check_fh(current_fh
, stp
);
4649 * Checks for sequence id mutating operations.
4652 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4653 stateid_t
*stateid
, char typemask
,
4654 struct nfs4_ol_stateid
**stpp
,
4655 struct nfsd_net
*nn
)
4658 struct nfs4_stid
*s
;
4659 struct nfs4_ol_stateid
*stp
= NULL
;
4661 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
4662 seqid
, STATEID_VAL(stateid
));
4665 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
4668 stp
= openlockstateid(s
);
4669 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
4671 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
4675 nfs4_put_stid(&stp
->st_stid
);
4679 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4680 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
4683 struct nfs4_openowner
*oo
;
4684 struct nfs4_ol_stateid
*stp
;
4686 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
4687 NFS4_OPEN_STID
, &stp
, nn
);
4690 oo
= openowner(stp
->st_stateowner
);
4691 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
4692 nfs4_put_stid(&stp
->st_stid
);
4693 return nfserr_bad_stateid
;
4700 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4701 struct nfsd4_open_confirm
*oc
)
4704 struct nfs4_openowner
*oo
;
4705 struct nfs4_ol_stateid
*stp
;
4706 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4708 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4709 cstate
->current_fh
.fh_dentry
);
4711 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
4715 status
= nfs4_preprocess_seqid_op(cstate
,
4716 oc
->oc_seqid
, &oc
->oc_req_stateid
,
4717 NFS4_OPEN_STID
, &stp
, nn
);
4720 oo
= openowner(stp
->st_stateowner
);
4721 status
= nfserr_bad_stateid
;
4722 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
4724 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
4725 update_stateid(&stp
->st_stid
.sc_stateid
);
4726 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4727 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
4728 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4730 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
4733 nfs4_put_stid(&stp
->st_stid
);
4735 nfsd4_bump_seqid(cstate
, status
);
4739 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
4741 if (!test_access(access
, stp
))
4743 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
4744 clear_access(access
, stp
);
4747 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
4749 switch (to_access
) {
4750 case NFS4_SHARE_ACCESS_READ
:
4751 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
4752 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4754 case NFS4_SHARE_ACCESS_WRITE
:
4755 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
4756 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4758 case NFS4_SHARE_ACCESS_BOTH
:
4766 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
4767 struct nfsd4_compound_state
*cstate
,
4768 struct nfsd4_open_downgrade
*od
)
4771 struct nfs4_ol_stateid
*stp
;
4772 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4774 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4775 cstate
->current_fh
.fh_dentry
);
4777 /* We don't yet support WANT bits: */
4778 if (od
->od_deleg_want
)
4779 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
4782 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
4783 &od
->od_stateid
, &stp
, nn
);
4786 status
= nfserr_inval
;
4787 if (!test_access(od
->od_share_access
, stp
)) {
4788 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
4789 stp
->st_access_bmap
, od
->od_share_access
);
4792 if (!test_deny(od
->od_share_deny
, stp
)) {
4793 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
4794 stp
->st_deny_bmap
, od
->od_share_deny
);
4797 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
4799 reset_union_bmap_deny(od
->od_share_deny
, stp
);
4801 update_stateid(&stp
->st_stid
.sc_stateid
);
4802 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4805 nfs4_put_stid(&stp
->st_stid
);
4807 nfsd4_bump_seqid(cstate
, status
);
4811 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4813 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
4814 LIST_HEAD(reaplist
);
4816 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4817 spin_lock(&clp
->cl_lock
);
4818 unhash_open_stateid(s
, &reaplist
);
4820 if (clp
->cl_minorversion
) {
4821 put_ol_stateid_locked(s
, &reaplist
);
4822 spin_unlock(&clp
->cl_lock
);
4823 free_ol_stateid_reaplist(&reaplist
);
4825 spin_unlock(&clp
->cl_lock
);
4826 free_ol_stateid_reaplist(&reaplist
);
4827 move_to_close_lru(s
, clp
->net
);
4832 * nfs4_unlock_state() called after encode
4835 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4836 struct nfsd4_close
*close
)
4839 struct nfs4_ol_stateid
*stp
;
4840 struct net
*net
= SVC_NET(rqstp
);
4841 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4843 dprintk("NFSD: nfsd4_close on file %pd\n",
4844 cstate
->current_fh
.fh_dentry
);
4846 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4848 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4850 nfsd4_bump_seqid(cstate
, status
);
4853 update_stateid(&stp
->st_stid
.sc_stateid
);
4854 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4856 nfsd4_return_all_file_layouts(stp
->st_stateowner
->so_client
,
4857 stp
->st_stid
.sc_file
);
4859 nfsd4_close_open_stateid(stp
);
4861 /* put reference from nfs4_preprocess_seqid_op */
4862 nfs4_put_stid(&stp
->st_stid
);
4868 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4869 struct nfsd4_delegreturn
*dr
)
4871 struct nfs4_delegation
*dp
;
4872 stateid_t
*stateid
= &dr
->dr_stateid
;
4873 struct nfs4_stid
*s
;
4875 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4877 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4880 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
4883 dp
= delegstateid(s
);
4884 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4888 destroy_delegation(dp
);
4890 nfs4_put_stid(&dp
->dl_stid
);
4896 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4899 end_offset(u64 start
, u64 len
)
4904 return end
>= start
? end
: NFS4_MAX_UINT64
;
4907 /* last octet in a range */
4909 last_byte_offset(u64 start
, u64 len
)
4915 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4919 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4920 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4921 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4922 * locking, this prevents us from being completely protocol-compliant. The
4923 * real solution to this problem is to start using unsigned file offsets in
4924 * the VFS, but this is a very deep change!
4927 nfs4_transform_lock_offset(struct file_lock
*lock
)
4929 if (lock
->fl_start
< 0)
4930 lock
->fl_start
= OFFSET_MAX
;
4931 if (lock
->fl_end
< 0)
4932 lock
->fl_end
= OFFSET_MAX
;
4935 static void nfsd4_fl_get_owner(struct file_lock
*dst
, struct file_lock
*src
)
4937 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)src
->fl_owner
;
4938 dst
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lo
->lo_owner
));
4941 static void nfsd4_fl_put_owner(struct file_lock
*fl
)
4943 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)fl
->fl_owner
;
4946 nfs4_put_stateowner(&lo
->lo_owner
);
4947 fl
->fl_owner
= NULL
;
4951 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4952 .lm_get_owner
= nfsd4_fl_get_owner
,
4953 .lm_put_owner
= nfsd4_fl_put_owner
,
4957 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4959 struct nfs4_lockowner
*lo
;
4961 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4962 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4963 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4964 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4965 if (!deny
->ld_owner
.data
)
4966 /* We just don't care that much */
4968 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4969 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4972 deny
->ld_owner
.len
= 0;
4973 deny
->ld_owner
.data
= NULL
;
4974 deny
->ld_clientid
.cl_boot
= 0;
4975 deny
->ld_clientid
.cl_id
= 0;
4977 deny
->ld_start
= fl
->fl_start
;
4978 deny
->ld_length
= NFS4_MAX_UINT64
;
4979 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4980 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4981 deny
->ld_type
= NFS4_READ_LT
;
4982 if (fl
->fl_type
!= F_RDLCK
)
4983 deny
->ld_type
= NFS4_WRITE_LT
;
4986 static struct nfs4_lockowner
*
4987 find_lockowner_str_locked(clientid_t
*clid
, struct xdr_netobj
*owner
,
4988 struct nfs4_client
*clp
)
4990 unsigned int strhashval
= ownerstr_hashval(owner
);
4991 struct nfs4_stateowner
*so
;
4993 lockdep_assert_held(&clp
->cl_lock
);
4995 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
4997 if (so
->so_is_open_owner
)
4999 if (same_owner_str(so
, owner
))
5000 return lockowner(nfs4_get_stateowner(so
));
5005 static struct nfs4_lockowner
*
5006 find_lockowner_str(clientid_t
*clid
, struct xdr_netobj
*owner
,
5007 struct nfs4_client
*clp
)
5009 struct nfs4_lockowner
*lo
;
5011 spin_lock(&clp
->cl_lock
);
5012 lo
= find_lockowner_str_locked(clid
, owner
, clp
);
5013 spin_unlock(&clp
->cl_lock
);
5017 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
5019 unhash_lockowner_locked(lockowner(sop
));
5022 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
5024 struct nfs4_lockowner
*lo
= lockowner(sop
);
5026 kmem_cache_free(lockowner_slab
, lo
);
5029 static const struct nfs4_stateowner_operations lockowner_ops
= {
5030 .so_unhash
= nfs4_unhash_lockowner
,
5031 .so_free
= nfs4_free_lockowner
,
5035 * Alloc a lock owner structure.
5036 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5039 * strhashval = ownerstr_hashval
5041 static struct nfs4_lockowner
*
5042 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
5043 struct nfs4_ol_stateid
*open_stp
,
5044 struct nfsd4_lock
*lock
)
5046 struct nfs4_lockowner
*lo
, *ret
;
5048 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
5051 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
5052 lo
->lo_owner
.so_is_open_owner
= 0;
5053 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
5054 lo
->lo_owner
.so_ops
= &lockowner_ops
;
5055 spin_lock(&clp
->cl_lock
);
5056 ret
= find_lockowner_str_locked(&clp
->cl_clientid
,
5057 &lock
->lk_new_owner
, clp
);
5059 list_add(&lo
->lo_owner
.so_strhash
,
5060 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5063 nfs4_free_lockowner(&lo
->lo_owner
);
5064 spin_unlock(&clp
->cl_lock
);
5069 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5070 struct nfs4_file
*fp
, struct inode
*inode
,
5071 struct nfs4_ol_stateid
*open_stp
)
5073 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5075 lockdep_assert_held(&clp
->cl_lock
);
5077 atomic_inc(&stp
->st_stid
.sc_count
);
5078 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5079 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5081 stp
->st_stid
.sc_file
= fp
;
5082 stp
->st_stid
.sc_free
= nfs4_free_lock_stateid
;
5083 stp
->st_access_bmap
= 0;
5084 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5085 stp
->st_openstp
= open_stp
;
5086 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5087 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5088 spin_lock(&fp
->fi_lock
);
5089 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5090 spin_unlock(&fp
->fi_lock
);
5093 static struct nfs4_ol_stateid
*
5094 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5096 struct nfs4_ol_stateid
*lst
;
5097 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5099 lockdep_assert_held(&clp
->cl_lock
);
5101 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5102 if (lst
->st_stid
.sc_file
== fp
) {
5103 atomic_inc(&lst
->st_stid
.sc_count
);
5110 static struct nfs4_ol_stateid
*
5111 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5112 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5115 struct nfs4_stid
*ns
= NULL
;
5116 struct nfs4_ol_stateid
*lst
;
5117 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5118 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5120 spin_lock(&clp
->cl_lock
);
5121 lst
= find_lock_stateid(lo
, fi
);
5123 spin_unlock(&clp
->cl_lock
);
5124 ns
= nfs4_alloc_stid(clp
, stateid_slab
);
5128 spin_lock(&clp
->cl_lock
);
5129 lst
= find_lock_stateid(lo
, fi
);
5131 lst
= openlockstateid(ns
);
5132 init_lock_stateid(lst
, lo
, fi
, inode
, ost
);
5137 spin_unlock(&clp
->cl_lock
);
5144 check_lock_length(u64 offset
, u64 length
)
5146 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5147 LOFF_OVERFLOW(offset
, length
)));
5150 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5152 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5154 lockdep_assert_held(&fp
->fi_lock
);
5156 if (test_access(access
, lock_stp
))
5158 __nfs4_file_get_access(fp
, access
);
5159 set_access(access
, lock_stp
);
5163 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5164 struct nfs4_ol_stateid
*ost
,
5165 struct nfsd4_lock
*lock
,
5166 struct nfs4_ol_stateid
**lst
, bool *new)
5169 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5170 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5171 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5172 struct inode
*inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
5173 struct nfs4_lockowner
*lo
;
5174 unsigned int strhashval
;
5176 lo
= find_lockowner_str(&cl
->cl_clientid
, &lock
->v
.new.owner
, cl
);
5178 strhashval
= ownerstr_hashval(&lock
->v
.new.owner
);
5179 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5181 return nfserr_jukebox
;
5183 /* with an existing lockowner, seqids must be the same */
5184 status
= nfserr_bad_seqid
;
5185 if (!cstate
->minorversion
&&
5186 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5190 *lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5192 status
= nfserr_jukebox
;
5197 nfs4_put_stateowner(&lo
->lo_owner
);
5205 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5206 struct nfsd4_lock
*lock
)
5208 struct nfs4_openowner
*open_sop
= NULL
;
5209 struct nfs4_lockowner
*lock_sop
= NULL
;
5210 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5211 struct nfs4_ol_stateid
*open_stp
= NULL
;
5212 struct nfs4_file
*fp
;
5213 struct file
*filp
= NULL
;
5214 struct file_lock
*file_lock
= NULL
;
5215 struct file_lock
*conflock
= NULL
;
5220 struct net
*net
= SVC_NET(rqstp
);
5221 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5223 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5224 (long long) lock
->lk_offset
,
5225 (long long) lock
->lk_length
);
5227 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5228 return nfserr_inval
;
5230 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5231 S_IFREG
, NFSD_MAY_LOCK
))) {
5232 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5236 if (lock
->lk_is_new
) {
5237 if (nfsd4_has_session(cstate
))
5238 /* See rfc 5661 18.10.3: given clientid is ignored: */
5239 memcpy(&lock
->v
.new.clientid
,
5240 &cstate
->session
->se_client
->cl_clientid
,
5241 sizeof(clientid_t
));
5243 status
= nfserr_stale_clientid
;
5244 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5247 /* validate and update open stateid and open seqid */
5248 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5249 lock
->lk_new_open_seqid
,
5250 &lock
->lk_new_open_stateid
,
5254 open_sop
= openowner(open_stp
->st_stateowner
);
5255 status
= nfserr_bad_stateid
;
5256 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5257 &lock
->v
.new.clientid
))
5259 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5262 status
= nfs4_preprocess_seqid_op(cstate
,
5263 lock
->lk_old_lock_seqid
,
5264 &lock
->lk_old_lock_stateid
,
5265 NFS4_LOCK_STID
, &lock_stp
, nn
);
5269 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5271 lkflg
= setlkflg(lock
->lk_type
);
5272 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5276 status
= nfserr_grace
;
5277 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5279 status
= nfserr_no_grace
;
5280 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5283 file_lock
= locks_alloc_lock();
5285 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5286 status
= nfserr_jukebox
;
5290 fp
= lock_stp
->st_stid
.sc_file
;
5291 switch (lock
->lk_type
) {
5294 spin_lock(&fp
->fi_lock
);
5295 filp
= find_readable_file_locked(fp
);
5297 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5298 spin_unlock(&fp
->fi_lock
);
5299 file_lock
->fl_type
= F_RDLCK
;
5302 case NFS4_WRITEW_LT
:
5303 spin_lock(&fp
->fi_lock
);
5304 filp
= find_writeable_file_locked(fp
);
5306 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
5307 spin_unlock(&fp
->fi_lock
);
5308 file_lock
->fl_type
= F_WRLCK
;
5311 status
= nfserr_inval
;
5315 status
= nfserr_openmode
;
5319 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
5320 file_lock
->fl_pid
= current
->tgid
;
5321 file_lock
->fl_file
= filp
;
5322 file_lock
->fl_flags
= FL_POSIX
;
5323 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5324 file_lock
->fl_start
= lock
->lk_offset
;
5325 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
5326 nfs4_transform_lock_offset(file_lock
);
5328 conflock
= locks_alloc_lock();
5330 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5331 status
= nfserr_jukebox
;
5335 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
5337 case 0: /* success! */
5338 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
5339 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
5343 case (EAGAIN
): /* conflock holds conflicting lock */
5344 status
= nfserr_denied
;
5345 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5346 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
5349 status
= nfserr_deadlock
;
5352 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
5353 status
= nfserrno(err
);
5360 /* Bump seqid manually if the 4.0 replay owner is openowner */
5361 if (cstate
->replay_owner
&&
5362 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
5363 seqid_mutating_err(ntohl(status
)))
5364 lock_sop
->lo_owner
.so_seqid
++;
5367 * If this is a new, never-before-used stateid, and we are
5368 * returning an error, then just go ahead and release it.
5371 release_lock_stateid(lock_stp
);
5373 nfs4_put_stid(&lock_stp
->st_stid
);
5376 nfs4_put_stid(&open_stp
->st_stid
);
5377 nfsd4_bump_seqid(cstate
, status
);
5379 locks_free_lock(file_lock
);
5381 locks_free_lock(conflock
);
5386 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5387 * so we do a temporary open here just to get an open file to pass to
5388 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5391 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
5394 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
5396 err
= nfserrno(vfs_test_lock(file
, lock
));
5406 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5407 struct nfsd4_lockt
*lockt
)
5409 struct file_lock
*file_lock
= NULL
;
5410 struct nfs4_lockowner
*lo
= NULL
;
5412 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5414 if (locks_in_grace(SVC_NET(rqstp
)))
5415 return nfserr_grace
;
5417 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
5418 return nfserr_inval
;
5420 if (!nfsd4_has_session(cstate
)) {
5421 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
5426 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5429 file_lock
= locks_alloc_lock();
5431 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5432 status
= nfserr_jukebox
;
5436 switch (lockt
->lt_type
) {
5439 file_lock
->fl_type
= F_RDLCK
;
5442 case NFS4_WRITEW_LT
:
5443 file_lock
->fl_type
= F_WRLCK
;
5446 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
5447 status
= nfserr_inval
;
5451 lo
= find_lockowner_str(&lockt
->lt_clientid
, &lockt
->lt_owner
,
5454 file_lock
->fl_owner
= (fl_owner_t
)lo
;
5455 file_lock
->fl_pid
= current
->tgid
;
5456 file_lock
->fl_flags
= FL_POSIX
;
5458 file_lock
->fl_start
= lockt
->lt_offset
;
5459 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
5461 nfs4_transform_lock_offset(file_lock
);
5463 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
5467 if (file_lock
->fl_type
!= F_UNLCK
) {
5468 status
= nfserr_denied
;
5469 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
5473 nfs4_put_stateowner(&lo
->lo_owner
);
5475 locks_free_lock(file_lock
);
5480 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5481 struct nfsd4_locku
*locku
)
5483 struct nfs4_ol_stateid
*stp
;
5484 struct file
*filp
= NULL
;
5485 struct file_lock
*file_lock
= NULL
;
5488 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5490 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5491 (long long) locku
->lu_offset
,
5492 (long long) locku
->lu_length
);
5494 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
5495 return nfserr_inval
;
5497 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
5498 &locku
->lu_stateid
, NFS4_LOCK_STID
,
5502 filp
= find_any_file(stp
->st_stid
.sc_file
);
5504 status
= nfserr_lock_range
;
5507 file_lock
= locks_alloc_lock();
5509 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5510 status
= nfserr_jukebox
;
5514 file_lock
->fl_type
= F_UNLCK
;
5515 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
5516 file_lock
->fl_pid
= current
->tgid
;
5517 file_lock
->fl_file
= filp
;
5518 file_lock
->fl_flags
= FL_POSIX
;
5519 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5520 file_lock
->fl_start
= locku
->lu_offset
;
5522 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
5524 nfs4_transform_lock_offset(file_lock
);
5526 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
5528 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
5531 update_stateid(&stp
->st_stid
.sc_stateid
);
5532 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
5536 nfs4_put_stid(&stp
->st_stid
);
5538 nfsd4_bump_seqid(cstate
, status
);
5540 locks_free_lock(file_lock
);
5544 status
= nfserrno(err
);
5550 * true: locks held by lockowner
5551 * false: no locks held by lockowner
5554 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
5556 struct file_lock
*fl
;
5558 struct file
*filp
= find_any_file(fp
);
5559 struct inode
*inode
;
5560 struct file_lock_context
*flctx
;
5563 /* Any valid lock stateid should have some sort of access */
5568 inode
= file_inode(filp
);
5569 flctx
= inode
->i_flctx
;
5571 if (flctx
&& !list_empty_careful(&flctx
->flc_posix
)) {
5572 spin_lock(&flctx
->flc_lock
);
5573 list_for_each_entry(fl
, &flctx
->flc_posix
, fl_list
) {
5574 if (fl
->fl_owner
== (fl_owner_t
)lowner
) {
5579 spin_unlock(&flctx
->flc_lock
);
5586 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
5587 struct nfsd4_compound_state
*cstate
,
5588 struct nfsd4_release_lockowner
*rlockowner
)
5590 clientid_t
*clid
= &rlockowner
->rl_clientid
;
5591 struct nfs4_stateowner
*sop
;
5592 struct nfs4_lockowner
*lo
= NULL
;
5593 struct nfs4_ol_stateid
*stp
;
5594 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
5595 unsigned int hashval
= ownerstr_hashval(owner
);
5597 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5598 struct nfs4_client
*clp
;
5600 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5601 clid
->cl_boot
, clid
->cl_id
);
5603 status
= lookup_clientid(clid
, cstate
, nn
);
5608 /* Find the matching lock stateowner */
5609 spin_lock(&clp
->cl_lock
);
5610 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
5613 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
5616 /* see if there are still any locks associated with it */
5617 lo
= lockowner(sop
);
5618 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
5619 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
5620 status
= nfserr_locks_held
;
5621 spin_unlock(&clp
->cl_lock
);
5626 nfs4_get_stateowner(sop
);
5629 spin_unlock(&clp
->cl_lock
);
5631 release_lockowner(lo
);
5635 static inline struct nfs4_client_reclaim
*
5638 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
5642 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
5644 struct nfs4_client_reclaim
*crp
;
5646 crp
= nfsd4_find_reclaim_client(name
, nn
);
5647 return (crp
&& crp
->cr_clp
);
5651 * failure => all reset bets are off, nfserr_no_grace...
5653 struct nfs4_client_reclaim
*
5654 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
5656 unsigned int strhashval
;
5657 struct nfs4_client_reclaim
*crp
;
5659 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
5660 crp
= alloc_reclaim();
5662 strhashval
= clientstr_hashval(name
);
5663 INIT_LIST_HEAD(&crp
->cr_strhash
);
5664 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
5665 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
5667 nn
->reclaim_str_hashtbl_size
++;
5673 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
5675 list_del(&crp
->cr_strhash
);
5677 nn
->reclaim_str_hashtbl_size
--;
5681 nfs4_release_reclaim(struct nfsd_net
*nn
)
5683 struct nfs4_client_reclaim
*crp
= NULL
;
5686 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5687 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
5688 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
5689 struct nfs4_client_reclaim
, cr_strhash
);
5690 nfs4_remove_reclaim_record(crp
, nn
);
5693 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
5697 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
5698 struct nfs4_client_reclaim
*
5699 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
5701 unsigned int strhashval
;
5702 struct nfs4_client_reclaim
*crp
= NULL
;
5704 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
5706 strhashval
= clientstr_hashval(recdir
);
5707 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
5708 if (same_name(crp
->cr_recdir
, recdir
)) {
5716 * Called from OPEN. Look for clientid in reclaim list.
5719 nfs4_check_open_reclaim(clientid_t
*clid
,
5720 struct nfsd4_compound_state
*cstate
,
5721 struct nfsd_net
*nn
)
5725 /* find clientid in conf_id_hashtbl */
5726 status
= lookup_clientid(clid
, cstate
, nn
);
5728 return nfserr_reclaim_bad
;
5730 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
, &cstate
->clp
->cl_flags
))
5731 return nfserr_no_grace
;
5733 if (nfsd4_client_record_check(cstate
->clp
))
5734 return nfserr_reclaim_bad
;
5739 #ifdef CONFIG_NFSD_FAULT_INJECTION
5741 put_client(struct nfs4_client
*clp
)
5743 atomic_dec(&clp
->cl_refcount
);
5746 static struct nfs4_client
*
5747 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5749 struct nfs4_client
*clp
;
5750 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5753 if (!nfsd_netns_ready(nn
))
5756 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5757 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5764 nfsd_inject_print_clients(void)
5766 struct nfs4_client
*clp
;
5768 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5770 char buf
[INET6_ADDRSTRLEN
];
5772 if (!nfsd_netns_ready(nn
))
5775 spin_lock(&nn
->client_lock
);
5776 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5777 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5778 pr_info("NFS Client: %s\n", buf
);
5781 spin_unlock(&nn
->client_lock
);
5787 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5790 struct nfs4_client
*clp
;
5791 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5794 if (!nfsd_netns_ready(nn
))
5797 spin_lock(&nn
->client_lock
);
5798 clp
= nfsd_find_client(addr
, addr_size
);
5800 if (mark_client_expired_locked(clp
) == nfs_ok
)
5805 spin_unlock(&nn
->client_lock
);
5814 nfsd_inject_forget_clients(u64 max
)
5817 struct nfs4_client
*clp
, *next
;
5818 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5820 LIST_HEAD(reaplist
);
5822 if (!nfsd_netns_ready(nn
))
5825 spin_lock(&nn
->client_lock
);
5826 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
5827 if (mark_client_expired_locked(clp
) == nfs_ok
) {
5828 list_add(&clp
->cl_lru
, &reaplist
);
5829 if (max
!= 0 && ++count
>= max
)
5833 spin_unlock(&nn
->client_lock
);
5835 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
5841 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
5844 char buf
[INET6_ADDRSTRLEN
];
5845 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5846 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
5850 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
5851 struct list_head
*collect
)
5853 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
5854 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5860 lockdep_assert_held(&nn
->client_lock
);
5861 atomic_inc(&clp
->cl_refcount
);
5862 list_add(&lst
->st_locks
, collect
);
5865 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
5866 struct list_head
*collect
,
5867 void (*func
)(struct nfs4_ol_stateid
*))
5869 struct nfs4_openowner
*oop
;
5870 struct nfs4_ol_stateid
*stp
, *st_next
;
5871 struct nfs4_ol_stateid
*lst
, *lst_next
;
5874 spin_lock(&clp
->cl_lock
);
5875 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
5876 list_for_each_entry_safe(stp
, st_next
,
5877 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
5878 list_for_each_entry_safe(lst
, lst_next
,
5879 &stp
->st_locks
, st_locks
) {
5882 nfsd_inject_add_lock_to_list(lst
,
5887 * Despite the fact that these functions deal
5888 * with 64-bit integers for "count", we must
5889 * ensure that it doesn't blow up the
5890 * clp->cl_refcount. Throw a warning if we
5891 * start to approach INT_MAX here.
5893 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
5900 spin_unlock(&clp
->cl_lock
);
5906 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
5909 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
5913 nfsd_print_client_locks(struct nfs4_client
*clp
)
5915 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
5916 nfsd_print_count(clp
, count
, "locked files");
5921 nfsd_inject_print_locks(void)
5923 struct nfs4_client
*clp
;
5925 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5928 if (!nfsd_netns_ready(nn
))
5931 spin_lock(&nn
->client_lock
);
5932 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
5933 count
+= nfsd_print_client_locks(clp
);
5934 spin_unlock(&nn
->client_lock
);
5940 nfsd_reap_locks(struct list_head
*reaplist
)
5942 struct nfs4_client
*clp
;
5943 struct nfs4_ol_stateid
*stp
, *next
;
5945 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
5946 list_del_init(&stp
->st_locks
);
5947 clp
= stp
->st_stid
.sc_client
;
5948 nfs4_put_stid(&stp
->st_stid
);
5954 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
5956 unsigned int count
= 0;
5957 struct nfs4_client
*clp
;
5958 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5960 LIST_HEAD(reaplist
);
5962 if (!nfsd_netns_ready(nn
))
5965 spin_lock(&nn
->client_lock
);
5966 clp
= nfsd_find_client(addr
, addr_size
);
5968 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
5969 spin_unlock(&nn
->client_lock
);
5970 nfsd_reap_locks(&reaplist
);
5975 nfsd_inject_forget_locks(u64 max
)
5978 struct nfs4_client
*clp
;
5979 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5981 LIST_HEAD(reaplist
);
5983 if (!nfsd_netns_ready(nn
))
5986 spin_lock(&nn
->client_lock
);
5987 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5988 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
5989 if (max
!= 0 && count
>= max
)
5992 spin_unlock(&nn
->client_lock
);
5993 nfsd_reap_locks(&reaplist
);
5998 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
5999 struct list_head
*collect
,
6000 void (*func
)(struct nfs4_openowner
*))
6002 struct nfs4_openowner
*oop
, *next
;
6003 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6007 lockdep_assert_held(&nn
->client_lock
);
6009 spin_lock(&clp
->cl_lock
);
6010 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
6014 atomic_inc(&clp
->cl_refcount
);
6015 list_add(&oop
->oo_perclient
, collect
);
6020 * Despite the fact that these functions deal with
6021 * 64-bit integers for "count", we must ensure that
6022 * it doesn't blow up the clp->cl_refcount. Throw a
6023 * warning if we start to approach INT_MAX here.
6025 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6029 spin_unlock(&clp
->cl_lock
);
6035 nfsd_print_client_openowners(struct nfs4_client
*clp
)
6037 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
6039 nfsd_print_count(clp
, count
, "openowners");
6044 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
6045 struct list_head
*collect
, u64 max
)
6047 return nfsd_foreach_client_openowner(clp
, max
, collect
,
6048 unhash_openowner_locked
);
6052 nfsd_inject_print_openowners(void)
6054 struct nfs4_client
*clp
;
6056 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6059 if (!nfsd_netns_ready(nn
))
6062 spin_lock(&nn
->client_lock
);
6063 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6064 count
+= nfsd_print_client_openowners(clp
);
6065 spin_unlock(&nn
->client_lock
);
6071 nfsd_reap_openowners(struct list_head
*reaplist
)
6073 struct nfs4_client
*clp
;
6074 struct nfs4_openowner
*oop
, *next
;
6076 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6077 list_del_init(&oop
->oo_perclient
);
6078 clp
= oop
->oo_owner
.so_client
;
6079 release_openowner(oop
);
6085 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6088 unsigned int count
= 0;
6089 struct nfs4_client
*clp
;
6090 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6092 LIST_HEAD(reaplist
);
6094 if (!nfsd_netns_ready(nn
))
6097 spin_lock(&nn
->client_lock
);
6098 clp
= nfsd_find_client(addr
, addr_size
);
6100 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6101 spin_unlock(&nn
->client_lock
);
6102 nfsd_reap_openowners(&reaplist
);
6107 nfsd_inject_forget_openowners(u64 max
)
6110 struct nfs4_client
*clp
;
6111 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6113 LIST_HEAD(reaplist
);
6115 if (!nfsd_netns_ready(nn
))
6118 spin_lock(&nn
->client_lock
);
6119 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6120 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6122 if (max
!= 0 && count
>= max
)
6125 spin_unlock(&nn
->client_lock
);
6126 nfsd_reap_openowners(&reaplist
);
6130 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6131 struct list_head
*victims
)
6133 struct nfs4_delegation
*dp
, *next
;
6134 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6138 lockdep_assert_held(&nn
->client_lock
);
6140 spin_lock(&state_lock
);
6141 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6144 * It's not safe to mess with delegations that have a
6145 * non-zero dl_time. They might have already been broken
6146 * and could be processed by the laundromat outside of
6147 * the state_lock. Just leave them be.
6149 if (dp
->dl_time
!= 0)
6152 atomic_inc(&clp
->cl_refcount
);
6153 unhash_delegation_locked(dp
);
6154 list_add(&dp
->dl_recall_lru
, victims
);
6158 * Despite the fact that these functions deal with
6159 * 64-bit integers for "count", we must ensure that
6160 * it doesn't blow up the clp->cl_refcount. Throw a
6161 * warning if we start to approach INT_MAX here.
6163 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6167 spin_unlock(&state_lock
);
6172 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6174 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6176 nfsd_print_count(clp
, count
, "delegations");
6181 nfsd_inject_print_delegations(void)
6183 struct nfs4_client
*clp
;
6185 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6188 if (!nfsd_netns_ready(nn
))
6191 spin_lock(&nn
->client_lock
);
6192 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6193 count
+= nfsd_print_client_delegations(clp
);
6194 spin_unlock(&nn
->client_lock
);
6200 nfsd_forget_delegations(struct list_head
*reaplist
)
6202 struct nfs4_client
*clp
;
6203 struct nfs4_delegation
*dp
, *next
;
6205 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6206 list_del_init(&dp
->dl_recall_lru
);
6207 clp
= dp
->dl_stid
.sc_client
;
6208 revoke_delegation(dp
);
6214 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6218 struct nfs4_client
*clp
;
6219 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6221 LIST_HEAD(reaplist
);
6223 if (!nfsd_netns_ready(nn
))
6226 spin_lock(&nn
->client_lock
);
6227 clp
= nfsd_find_client(addr
, addr_size
);
6229 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6230 spin_unlock(&nn
->client_lock
);
6232 nfsd_forget_delegations(&reaplist
);
6237 nfsd_inject_forget_delegations(u64 max
)
6240 struct nfs4_client
*clp
;
6241 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6243 LIST_HEAD(reaplist
);
6245 if (!nfsd_netns_ready(nn
))
6248 spin_lock(&nn
->client_lock
);
6249 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6250 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6251 if (max
!= 0 && count
>= max
)
6254 spin_unlock(&nn
->client_lock
);
6255 nfsd_forget_delegations(&reaplist
);
6260 nfsd_recall_delegations(struct list_head
*reaplist
)
6262 struct nfs4_client
*clp
;
6263 struct nfs4_delegation
*dp
, *next
;
6265 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6266 list_del_init(&dp
->dl_recall_lru
);
6267 clp
= dp
->dl_stid
.sc_client
;
6269 * We skipped all entries that had a zero dl_time before,
6270 * so we can now reset the dl_time back to 0. If a delegation
6271 * break comes in now, then it won't make any difference since
6272 * we're recalling it either way.
6274 spin_lock(&state_lock
);
6276 spin_unlock(&state_lock
);
6277 nfsd_break_one_deleg(dp
);
6283 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
6287 struct nfs4_client
*clp
;
6288 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6290 LIST_HEAD(reaplist
);
6292 if (!nfsd_netns_ready(nn
))
6295 spin_lock(&nn
->client_lock
);
6296 clp
= nfsd_find_client(addr
, addr_size
);
6298 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6299 spin_unlock(&nn
->client_lock
);
6301 nfsd_recall_delegations(&reaplist
);
6306 nfsd_inject_recall_delegations(u64 max
)
6309 struct nfs4_client
*clp
, *next
;
6310 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6312 LIST_HEAD(reaplist
);
6314 if (!nfsd_netns_ready(nn
))
6317 spin_lock(&nn
->client_lock
);
6318 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6319 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6320 if (max
!= 0 && ++count
>= max
)
6323 spin_unlock(&nn
->client_lock
);
6324 nfsd_recall_delegations(&reaplist
);
6327 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6330 * Since the lifetime of a delegation isn't limited to that of an open, a
6331 * client may quite reasonably hang on to a delegation as long as it has
6332 * the inode cached. This becomes an obvious problem the first time a
6333 * client's inode cache approaches the size of the server's total memory.
6335 * For now we avoid this problem by imposing a hard limit on the number
6336 * of delegations, which varies according to the server's memory size.
6339 set_max_delegations(void)
6342 * Allow at most 4 delegations per megabyte of RAM. Quick
6343 * estimates suggest that in the worst case (where every delegation
6344 * is for a different inode), a delegation could take about 1.5K,
6345 * giving a worst case usage of about 6% of memory.
6347 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
6350 static int nfs4_state_create_net(struct net
*net
)
6352 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6355 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6356 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6357 if (!nn
->conf_id_hashtbl
)
6359 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6360 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6361 if (!nn
->unconf_id_hashtbl
)
6363 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
6364 SESSION_HASH_SIZE
, GFP_KERNEL
);
6365 if (!nn
->sessionid_hashtbl
)
6368 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6369 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
6370 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
6372 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
6373 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
6374 nn
->conf_name_tree
= RB_ROOT
;
6375 nn
->unconf_name_tree
= RB_ROOT
;
6376 INIT_LIST_HEAD(&nn
->client_lru
);
6377 INIT_LIST_HEAD(&nn
->close_lru
);
6378 INIT_LIST_HEAD(&nn
->del_recall_lru
);
6379 spin_lock_init(&nn
->client_lock
);
6381 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
6387 kfree(nn
->unconf_id_hashtbl
);
6389 kfree(nn
->conf_id_hashtbl
);
6395 nfs4_state_destroy_net(struct net
*net
)
6398 struct nfs4_client
*clp
= NULL
;
6399 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6401 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6402 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
6403 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6404 destroy_client(clp
);
6408 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6409 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
6410 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6411 destroy_client(clp
);
6415 kfree(nn
->sessionid_hashtbl
);
6416 kfree(nn
->unconf_id_hashtbl
);
6417 kfree(nn
->conf_id_hashtbl
);
6422 nfs4_state_start_net(struct net
*net
)
6424 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6427 ret
= nfs4_state_create_net(net
);
6430 nn
->boot_time
= get_seconds();
6431 nn
->grace_ended
= false;
6432 locks_start_grace(net
, &nn
->nfsd4_manager
);
6433 nfsd4_client_tracking_init(net
);
6434 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
6435 nn
->nfsd4_grace
, net
);
6436 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
6440 /* initialization to perform when the nfsd service is started: */
6443 nfs4_state_start(void)
6447 ret
= set_callback_cred();
6450 laundry_wq
= create_singlethread_workqueue("nfsd4");
6451 if (laundry_wq
== NULL
) {
6455 ret
= nfsd4_create_callback_queue();
6457 goto out_free_laundry
;
6459 set_max_delegations();
6464 destroy_workqueue(laundry_wq
);
6470 nfs4_state_shutdown_net(struct net
*net
)
6472 struct nfs4_delegation
*dp
= NULL
;
6473 struct list_head
*pos
, *next
, reaplist
;
6474 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6476 cancel_delayed_work_sync(&nn
->laundromat_work
);
6477 locks_end_grace(&nn
->nfsd4_manager
);
6479 INIT_LIST_HEAD(&reaplist
);
6480 spin_lock(&state_lock
);
6481 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
6482 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6483 unhash_delegation_locked(dp
);
6484 list_add(&dp
->dl_recall_lru
, &reaplist
);
6486 spin_unlock(&state_lock
);
6487 list_for_each_safe(pos
, next
, &reaplist
) {
6488 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6489 list_del_init(&dp
->dl_recall_lru
);
6490 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
6491 nfs4_put_stid(&dp
->dl_stid
);
6494 nfsd4_client_tracking_exit(net
);
6495 nfs4_state_destroy_net(net
);
6499 nfs4_state_shutdown(void)
6501 destroy_workqueue(laundry_wq
);
6502 nfsd4_destroy_callback_queue();
6506 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6508 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
6509 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
6513 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6515 if (cstate
->minorversion
) {
6516 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
6517 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6522 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
6524 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6528 * functions to set current state id
6531 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6533 put_stateid(cstate
, &odp
->od_stateid
);
6537 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
6539 put_stateid(cstate
, &open
->op_stateid
);
6543 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6545 put_stateid(cstate
, &close
->cl_stateid
);
6549 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
6551 put_stateid(cstate
, &lock
->lk_resp_stateid
);
6555 * functions to consume current state id
6559 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6561 get_stateid(cstate
, &odp
->od_stateid
);
6565 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
6567 get_stateid(cstate
, &drp
->dr_stateid
);
6571 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
6573 get_stateid(cstate
, &fsp
->fr_stateid
);
6577 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
6579 get_stateid(cstate
, &setattr
->sa_stateid
);
6583 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6585 get_stateid(cstate
, &close
->cl_stateid
);
6589 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
6591 get_stateid(cstate
, &locku
->lu_stateid
);
6595 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
6597 get_stateid(cstate
, &read
->rd_stateid
);
6601 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
6603 get_stateid(cstate
, &write
->wr_stateid
);