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/hash.h>
48 #include "current_stateid.h"
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 #define all_ones {{~0,~0},~0}
55 static const stateid_t one_stateid
= {
57 .si_opaque
= all_ones
,
59 static const stateid_t zero_stateid
= {
62 static const stateid_t currentstateid
= {
66 static u64 current_sessionid
= 1;
68 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
69 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
70 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static bool check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
);
74 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
);
79 * Currently used for the del_recall_lru and file hash table. In an
80 * effort to decrease the scope of the client_mutex, this spinlock may
81 * eventually cover more:
83 static DEFINE_SPINLOCK(state_lock
);
86 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
87 * the refcount on the open stateid to drop.
89 static DECLARE_WAIT_QUEUE_HEAD(close_wq
);
91 static struct kmem_cache
*openowner_slab
;
92 static struct kmem_cache
*lockowner_slab
;
93 static struct kmem_cache
*file_slab
;
94 static struct kmem_cache
*stateid_slab
;
95 static struct kmem_cache
*deleg_slab
;
97 static void free_session(struct nfsd4_session
*);
99 static bool is_session_dead(struct nfsd4_session
*ses
)
101 return ses
->se_flags
& NFS4_SESSION_DEAD
;
104 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
106 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
107 return nfserr_jukebox
;
108 ses
->se_flags
|= NFS4_SESSION_DEAD
;
112 static bool is_client_expired(struct nfs4_client
*clp
)
114 return clp
->cl_time
== 0;
117 static __be32
get_client_locked(struct nfs4_client
*clp
)
119 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
121 lockdep_assert_held(&nn
->client_lock
);
123 if (is_client_expired(clp
))
124 return nfserr_expired
;
125 atomic_inc(&clp
->cl_refcount
);
129 /* must be called under the client_lock */
131 renew_client_locked(struct nfs4_client
*clp
)
133 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
135 if (is_client_expired(clp
)) {
137 printk("%s: client (clientid %08x/%08x) already expired\n",
139 clp
->cl_clientid
.cl_boot
,
140 clp
->cl_clientid
.cl_id
);
144 dprintk("renewing client (clientid %08x/%08x)\n",
145 clp
->cl_clientid
.cl_boot
,
146 clp
->cl_clientid
.cl_id
);
147 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
148 clp
->cl_time
= get_seconds();
152 renew_client(struct nfs4_client
*clp
)
154 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
156 spin_lock(&nn
->client_lock
);
157 renew_client_locked(clp
);
158 spin_unlock(&nn
->client_lock
);
161 static void put_client_renew_locked(struct nfs4_client
*clp
)
163 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
165 lockdep_assert_held(&nn
->client_lock
);
167 if (!atomic_dec_and_test(&clp
->cl_refcount
))
169 if (!is_client_expired(clp
))
170 renew_client_locked(clp
);
173 static void put_client_renew(struct nfs4_client
*clp
)
175 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
177 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
179 if (!is_client_expired(clp
))
180 renew_client_locked(clp
);
181 spin_unlock(&nn
->client_lock
);
184 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
188 if (is_session_dead(ses
))
189 return nfserr_badsession
;
190 status
= get_client_locked(ses
->se_client
);
193 atomic_inc(&ses
->se_ref
);
197 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
199 struct nfs4_client
*clp
= ses
->se_client
;
200 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
202 lockdep_assert_held(&nn
->client_lock
);
204 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
206 put_client_renew_locked(clp
);
209 static void nfsd4_put_session(struct nfsd4_session
*ses
)
211 struct nfs4_client
*clp
= ses
->se_client
;
212 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
214 spin_lock(&nn
->client_lock
);
215 nfsd4_put_session_locked(ses
);
216 spin_unlock(&nn
->client_lock
);
219 static inline struct nfs4_stateowner
*
220 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
222 atomic_inc(&sop
->so_count
);
227 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
229 return (sop
->so_owner
.len
== owner
->len
) &&
230 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
233 static struct nfs4_openowner
*
234 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
235 struct nfs4_client
*clp
)
237 struct nfs4_stateowner
*so
;
239 lockdep_assert_held(&clp
->cl_lock
);
241 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
243 if (!so
->so_is_open_owner
)
245 if (same_owner_str(so
, &open
->op_owner
))
246 return openowner(nfs4_get_stateowner(so
));
251 static struct nfs4_openowner
*
252 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
253 struct nfs4_client
*clp
)
255 struct nfs4_openowner
*oo
;
257 spin_lock(&clp
->cl_lock
);
258 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
259 spin_unlock(&clp
->cl_lock
);
264 opaque_hashval(const void *ptr
, int nbytes
)
266 unsigned char *cptr
= (unsigned char *) ptr
;
276 static void nfsd4_free_file(struct nfs4_file
*f
)
278 kmem_cache_free(file_slab
, f
);
282 put_nfs4_file(struct nfs4_file
*fi
)
284 might_lock(&state_lock
);
286 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
287 hlist_del(&fi
->fi_hash
);
288 spin_unlock(&state_lock
);
294 get_nfs4_file(struct nfs4_file
*fi
)
296 atomic_inc(&fi
->fi_ref
);
300 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
302 if (f
->fi_fds
[oflag
])
303 return get_file(f
->fi_fds
[oflag
]);
308 find_writeable_file_locked(struct nfs4_file
*f
)
312 lockdep_assert_held(&f
->fi_lock
);
314 ret
= __nfs4_get_fd(f
, O_WRONLY
);
316 ret
= __nfs4_get_fd(f
, O_RDWR
);
321 find_writeable_file(struct nfs4_file
*f
)
325 spin_lock(&f
->fi_lock
);
326 ret
= find_writeable_file_locked(f
);
327 spin_unlock(&f
->fi_lock
);
332 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
336 lockdep_assert_held(&f
->fi_lock
);
338 ret
= __nfs4_get_fd(f
, O_RDONLY
);
340 ret
= __nfs4_get_fd(f
, O_RDWR
);
345 find_readable_file(struct nfs4_file
*f
)
349 spin_lock(&f
->fi_lock
);
350 ret
= find_readable_file_locked(f
);
351 spin_unlock(&f
->fi_lock
);
357 find_any_file(struct nfs4_file
*f
)
361 spin_lock(&f
->fi_lock
);
362 ret
= __nfs4_get_fd(f
, O_RDWR
);
364 ret
= __nfs4_get_fd(f
, O_WRONLY
);
366 ret
= __nfs4_get_fd(f
, O_RDONLY
);
368 spin_unlock(&f
->fi_lock
);
372 static atomic_long_t num_delegations
;
373 unsigned long max_delegations
;
376 * Open owner state (share locks)
379 /* hash tables for lock and open owners */
380 #define OWNER_HASH_BITS 8
381 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
382 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
384 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
388 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
389 return ret
& OWNER_HASH_MASK
;
392 /* hash table for nfs4_file */
393 #define FILE_HASH_BITS 8
394 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
396 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
398 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
401 static unsigned int file_hashval(struct knfsd_fh
*fh
)
403 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
406 static bool nfsd_fh_match(struct knfsd_fh
*fh1
, struct knfsd_fh
*fh2
)
408 return fh1
->fh_size
== fh2
->fh_size
&&
409 !memcmp(fh1
->fh_base
.fh_pad
,
414 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
417 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
419 lockdep_assert_held(&fp
->fi_lock
);
421 if (access
& NFS4_SHARE_ACCESS_WRITE
)
422 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
423 if (access
& NFS4_SHARE_ACCESS_READ
)
424 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
428 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
430 lockdep_assert_held(&fp
->fi_lock
);
432 /* Does this access mode make sense? */
433 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
436 /* Does it conflict with a deny mode already set? */
437 if ((access
& fp
->fi_share_deny
) != 0)
438 return nfserr_share_denied
;
440 __nfs4_file_get_access(fp
, access
);
444 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
446 /* Common case is that there is no deny mode. */
448 /* Does this deny mode make sense? */
449 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
452 if ((deny
& NFS4_SHARE_DENY_READ
) &&
453 atomic_read(&fp
->fi_access
[O_RDONLY
]))
454 return nfserr_share_denied
;
456 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
457 atomic_read(&fp
->fi_access
[O_WRONLY
]))
458 return nfserr_share_denied
;
463 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
465 might_lock(&fp
->fi_lock
);
467 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
468 struct file
*f1
= NULL
;
469 struct file
*f2
= NULL
;
471 swap(f1
, fp
->fi_fds
[oflag
]);
472 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
473 swap(f2
, fp
->fi_fds
[O_RDWR
]);
474 spin_unlock(&fp
->fi_lock
);
482 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
484 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
486 if (access
& NFS4_SHARE_ACCESS_WRITE
)
487 __nfs4_file_put_access(fp
, O_WRONLY
);
488 if (access
& NFS4_SHARE_ACCESS_READ
)
489 __nfs4_file_put_access(fp
, O_RDONLY
);
492 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
,
493 struct kmem_cache
*slab
)
495 struct nfs4_stid
*stid
;
498 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
502 idr_preload(GFP_KERNEL
);
503 spin_lock(&cl
->cl_lock
);
504 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
505 spin_unlock(&cl
->cl_lock
);
509 stid
->sc_client
= cl
;
510 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
511 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
512 /* Will be incremented before return to client: */
513 atomic_set(&stid
->sc_count
, 1);
516 * It shouldn't be a problem to reuse an opaque stateid value.
517 * I don't think it is for 4.1. But with 4.0 I worry that, for
518 * example, a stray write retransmission could be accepted by
519 * the server when it should have been rejected. Therefore,
520 * adopt a trick from the sctp code to attempt to maximize the
521 * amount of time until an id is reused, by ensuring they always
522 * "increase" (mod INT_MAX):
526 kmem_cache_free(slab
, stid
);
530 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
532 struct nfs4_stid
*stid
;
533 struct nfs4_ol_stateid
*stp
;
535 stid
= nfs4_alloc_stid(clp
, stateid_slab
);
539 stp
= openlockstateid(stid
);
540 stp
->st_stid
.sc_free
= nfs4_free_ol_stateid
;
544 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
546 kmem_cache_free(deleg_slab
, stid
);
547 atomic_long_dec(&num_delegations
);
551 * When we recall a delegation, we should be careful not to hand it
552 * out again straight away.
553 * To ensure this we keep a pair of bloom filters ('new' and 'old')
554 * in which the filehandles of recalled delegations are "stored".
555 * If a filehandle appear in either filter, a delegation is blocked.
556 * When a delegation is recalled, the filehandle is stored in the "new"
558 * Every 30 seconds we swap the filters and clear the "new" one,
559 * unless both are empty of course.
561 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
562 * low 3 bytes as hash-table indices.
564 * 'blocked_delegations_lock', which is always taken in block_delegations(),
565 * is used to manage concurrent access. Testing does not need the lock
566 * except when swapping the two filters.
568 static DEFINE_SPINLOCK(blocked_delegations_lock
);
569 static struct bloom_pair
{
570 int entries
, old_entries
;
572 int new; /* index into 'set' */
573 DECLARE_BITMAP(set
[2], 256);
574 } blocked_delegations
;
576 static int delegation_blocked(struct knfsd_fh
*fh
)
579 struct bloom_pair
*bd
= &blocked_delegations
;
581 if (bd
->entries
== 0)
583 if (seconds_since_boot() - bd
->swap_time
> 30) {
584 spin_lock(&blocked_delegations_lock
);
585 if (seconds_since_boot() - bd
->swap_time
> 30) {
586 bd
->entries
-= bd
->old_entries
;
587 bd
->old_entries
= bd
->entries
;
588 memset(bd
->set
[bd
->new], 0,
591 bd
->swap_time
= seconds_since_boot();
593 spin_unlock(&blocked_delegations_lock
);
595 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
596 if (test_bit(hash
&255, bd
->set
[0]) &&
597 test_bit((hash
>>8)&255, bd
->set
[0]) &&
598 test_bit((hash
>>16)&255, bd
->set
[0]))
601 if (test_bit(hash
&255, bd
->set
[1]) &&
602 test_bit((hash
>>8)&255, bd
->set
[1]) &&
603 test_bit((hash
>>16)&255, bd
->set
[1]))
609 static void block_delegations(struct knfsd_fh
*fh
)
612 struct bloom_pair
*bd
= &blocked_delegations
;
614 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
616 spin_lock(&blocked_delegations_lock
);
617 __set_bit(hash
&255, bd
->set
[bd
->new]);
618 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
619 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
620 if (bd
->entries
== 0)
621 bd
->swap_time
= seconds_since_boot();
623 spin_unlock(&blocked_delegations_lock
);
626 static struct nfs4_delegation
*
627 alloc_init_deleg(struct nfs4_client
*clp
, struct svc_fh
*current_fh
)
629 struct nfs4_delegation
*dp
;
632 dprintk("NFSD alloc_init_deleg\n");
633 n
= atomic_long_inc_return(&num_delegations
);
634 if (n
< 0 || n
> max_delegations
)
636 if (delegation_blocked(¤t_fh
->fh_handle
))
638 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
642 dp
->dl_stid
.sc_free
= nfs4_free_deleg
;
644 * delegation seqid's are never incremented. The 4.1 special
645 * meaning of seqid 0 isn't meaningful, really, but let's avoid
646 * 0 anyway just for consistency and use 1:
648 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
649 INIT_LIST_HEAD(&dp
->dl_perfile
);
650 INIT_LIST_HEAD(&dp
->dl_perclnt
);
651 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
652 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
653 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_run_cb_recall
);
656 atomic_long_dec(&num_delegations
);
661 nfs4_put_stid(struct nfs4_stid
*s
)
663 struct nfs4_file
*fp
= s
->sc_file
;
664 struct nfs4_client
*clp
= s
->sc_client
;
666 might_lock(&clp
->cl_lock
);
668 if (!atomic_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
669 wake_up_all(&close_wq
);
672 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
673 spin_unlock(&clp
->cl_lock
);
679 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
681 struct file
*filp
= NULL
;
683 spin_lock(&fp
->fi_lock
);
684 if (fp
->fi_deleg_file
&& atomic_dec_and_test(&fp
->fi_delegees
))
685 swap(filp
, fp
->fi_deleg_file
);
686 spin_unlock(&fp
->fi_lock
);
689 vfs_setlease(filp
, F_UNLCK
, NULL
, NULL
);
694 static void unhash_stid(struct nfs4_stid
*s
)
700 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
702 lockdep_assert_held(&state_lock
);
703 lockdep_assert_held(&fp
->fi_lock
);
705 atomic_inc(&dp
->dl_stid
.sc_count
);
706 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
707 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
708 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
712 unhash_delegation_locked(struct nfs4_delegation
*dp
)
714 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
716 lockdep_assert_held(&state_lock
);
718 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
719 /* Ensure that deleg break won't try to requeue it */
721 spin_lock(&fp
->fi_lock
);
722 list_del_init(&dp
->dl_perclnt
);
723 list_del_init(&dp
->dl_recall_lru
);
724 list_del_init(&dp
->dl_perfile
);
725 spin_unlock(&fp
->fi_lock
);
728 static void destroy_delegation(struct nfs4_delegation
*dp
)
730 spin_lock(&state_lock
);
731 unhash_delegation_locked(dp
);
732 spin_unlock(&state_lock
);
733 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
734 nfs4_put_stid(&dp
->dl_stid
);
737 static void revoke_delegation(struct nfs4_delegation
*dp
)
739 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
741 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
743 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
745 if (clp
->cl_minorversion
== 0)
746 nfs4_put_stid(&dp
->dl_stid
);
748 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
749 spin_lock(&clp
->cl_lock
);
750 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
751 spin_unlock(&clp
->cl_lock
);
759 static unsigned int clientid_hashval(u32 id
)
761 return id
& CLIENT_HASH_MASK
;
764 static unsigned int clientstr_hashval(const char *name
)
766 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
770 * We store the NONE, READ, WRITE, and BOTH bits separately in the
771 * st_{access,deny}_bmap field of the stateid, in order to track not
772 * only what share bits are currently in force, but also what
773 * combinations of share bits previous opens have used. This allows us
774 * to enforce the recommendation of rfc 3530 14.2.19 that the server
775 * return an error if the client attempt to downgrade to a combination
776 * of share bits not explicable by closing some of its previous opens.
778 * XXX: This enforcement is actually incomplete, since we don't keep
779 * track of access/deny bit combinations; so, e.g., we allow:
781 * OPEN allow read, deny write
782 * OPEN allow both, deny none
783 * DOWNGRADE allow read, deny none
785 * which we should reject.
788 bmap_to_share_mode(unsigned long bmap
) {
790 unsigned int access
= 0;
792 for (i
= 1; i
< 4; i
++) {
793 if (test_bit(i
, &bmap
))
799 /* set share access for a given stateid */
801 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
803 unsigned char mask
= 1 << access
;
805 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
806 stp
->st_access_bmap
|= mask
;
809 /* clear share access for a given stateid */
811 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
813 unsigned char mask
= 1 << access
;
815 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
816 stp
->st_access_bmap
&= ~mask
;
819 /* test whether a given stateid has access */
821 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
823 unsigned char mask
= 1 << access
;
825 return (bool)(stp
->st_access_bmap
& mask
);
828 /* set share deny for a given stateid */
830 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
832 unsigned char mask
= 1 << deny
;
834 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
835 stp
->st_deny_bmap
|= mask
;
838 /* clear share deny for a given stateid */
840 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
842 unsigned char mask
= 1 << deny
;
844 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
845 stp
->st_deny_bmap
&= ~mask
;
848 /* test whether a given stateid is denying specific access */
850 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
852 unsigned char mask
= 1 << deny
;
854 return (bool)(stp
->st_deny_bmap
& mask
);
857 static int nfs4_access_to_omode(u32 access
)
859 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
860 case NFS4_SHARE_ACCESS_READ
:
862 case NFS4_SHARE_ACCESS_WRITE
:
864 case NFS4_SHARE_ACCESS_BOTH
:
872 * A stateid that had a deny mode associated with it is being released
873 * or downgraded. Recalculate the deny mode on the file.
876 recalculate_deny_mode(struct nfs4_file
*fp
)
878 struct nfs4_ol_stateid
*stp
;
880 spin_lock(&fp
->fi_lock
);
881 fp
->fi_share_deny
= 0;
882 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
883 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
884 spin_unlock(&fp
->fi_lock
);
888 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
893 for (i
= 1; i
< 4; i
++) {
894 if ((i
& deny
) != i
) {
900 /* Recalculate per-file deny mode if there was a change */
902 recalculate_deny_mode(stp
->st_stid
.sc_file
);
905 /* release all access and file references for a given stateid */
907 release_all_access(struct nfs4_ol_stateid
*stp
)
910 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
912 if (fp
&& stp
->st_deny_bmap
!= 0)
913 recalculate_deny_mode(fp
);
915 for (i
= 1; i
< 4; i
++) {
916 if (test_access(i
, stp
))
917 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
918 clear_access(i
, stp
);
922 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
924 struct nfs4_client
*clp
= sop
->so_client
;
926 might_lock(&clp
->cl_lock
);
928 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
930 sop
->so_ops
->so_unhash(sop
);
931 spin_unlock(&clp
->cl_lock
);
932 kfree(sop
->so_owner
.data
);
933 sop
->so_ops
->so_free(sop
);
936 static void unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
938 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
940 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
942 spin_lock(&fp
->fi_lock
);
943 list_del(&stp
->st_perfile
);
944 spin_unlock(&fp
->fi_lock
);
945 list_del(&stp
->st_perstateowner
);
948 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
950 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
952 release_all_access(stp
);
953 if (stp
->st_stateowner
)
954 nfs4_put_stateowner(stp
->st_stateowner
);
955 kmem_cache_free(stateid_slab
, stid
);
958 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
960 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
961 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
964 file
= find_any_file(stp
->st_stid
.sc_file
);
966 filp_close(file
, (fl_owner_t
)lo
);
967 nfs4_free_ol_stateid(stid
);
971 * Put the persistent reference to an already unhashed generic stateid, while
972 * holding the cl_lock. If it's the last reference, then put it onto the
973 * reaplist for later destruction.
975 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
976 struct list_head
*reaplist
)
978 struct nfs4_stid
*s
= &stp
->st_stid
;
979 struct nfs4_client
*clp
= s
->sc_client
;
981 lockdep_assert_held(&clp
->cl_lock
);
983 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
985 if (!atomic_dec_and_test(&s
->sc_count
)) {
986 wake_up_all(&close_wq
);
990 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
991 list_add(&stp
->st_locks
, reaplist
);
994 static void unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
996 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
998 lockdep_assert_held(&oo
->oo_owner
.so_client
->cl_lock
);
1000 list_del_init(&stp
->st_locks
);
1001 unhash_ol_stateid(stp
);
1002 unhash_stid(&stp
->st_stid
);
1005 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
1007 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
1009 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
1010 unhash_lock_stateid(stp
);
1011 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
1012 nfs4_put_stid(&stp
->st_stid
);
1015 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1017 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1019 lockdep_assert_held(&clp
->cl_lock
);
1021 list_del_init(&lo
->lo_owner
.so_strhash
);
1025 * Free a list of generic stateids that were collected earlier after being
1029 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1031 struct nfs4_ol_stateid
*stp
;
1032 struct nfs4_file
*fp
;
1036 while (!list_empty(reaplist
)) {
1037 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1039 list_del(&stp
->st_locks
);
1040 fp
= stp
->st_stid
.sc_file
;
1041 stp
->st_stid
.sc_free(&stp
->st_stid
);
1047 static void release_lockowner(struct nfs4_lockowner
*lo
)
1049 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1050 struct nfs4_ol_stateid
*stp
;
1051 struct list_head reaplist
;
1053 INIT_LIST_HEAD(&reaplist
);
1055 spin_lock(&clp
->cl_lock
);
1056 unhash_lockowner_locked(lo
);
1057 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
1058 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
1059 struct nfs4_ol_stateid
, st_perstateowner
);
1060 unhash_lock_stateid(stp
);
1061 put_ol_stateid_locked(stp
, &reaplist
);
1063 spin_unlock(&clp
->cl_lock
);
1064 free_ol_stateid_reaplist(&reaplist
);
1065 nfs4_put_stateowner(&lo
->lo_owner
);
1068 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1069 struct list_head
*reaplist
)
1071 struct nfs4_ol_stateid
*stp
;
1073 while (!list_empty(&open_stp
->st_locks
)) {
1074 stp
= list_entry(open_stp
->st_locks
.next
,
1075 struct nfs4_ol_stateid
, st_locks
);
1076 unhash_lock_stateid(stp
);
1077 put_ol_stateid_locked(stp
, reaplist
);
1081 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1082 struct list_head
*reaplist
)
1084 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1086 unhash_ol_stateid(stp
);
1087 release_open_stateid_locks(stp
, reaplist
);
1090 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1092 LIST_HEAD(reaplist
);
1094 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1095 unhash_open_stateid(stp
, &reaplist
);
1096 put_ol_stateid_locked(stp
, &reaplist
);
1097 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1098 free_ol_stateid_reaplist(&reaplist
);
1101 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1103 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1105 lockdep_assert_held(&clp
->cl_lock
);
1107 list_del_init(&oo
->oo_owner
.so_strhash
);
1108 list_del_init(&oo
->oo_perclient
);
1111 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1113 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1115 struct nfs4_ol_stateid
*s
;
1117 spin_lock(&nn
->client_lock
);
1118 s
= oo
->oo_last_closed_stid
;
1120 list_del_init(&oo
->oo_close_lru
);
1121 oo
->oo_last_closed_stid
= NULL
;
1123 spin_unlock(&nn
->client_lock
);
1125 nfs4_put_stid(&s
->st_stid
);
1128 static void release_openowner(struct nfs4_openowner
*oo
)
1130 struct nfs4_ol_stateid
*stp
;
1131 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1132 struct list_head reaplist
;
1134 INIT_LIST_HEAD(&reaplist
);
1136 spin_lock(&clp
->cl_lock
);
1137 unhash_openowner_locked(oo
);
1138 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1139 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1140 struct nfs4_ol_stateid
, st_perstateowner
);
1141 unhash_open_stateid(stp
, &reaplist
);
1142 put_ol_stateid_locked(stp
, &reaplist
);
1144 spin_unlock(&clp
->cl_lock
);
1145 free_ol_stateid_reaplist(&reaplist
);
1146 release_last_closed_stateid(oo
);
1147 nfs4_put_stateowner(&oo
->oo_owner
);
1151 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1153 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1155 return sid
->sequence
% SESSION_HASH_SIZE
;
1160 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1162 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1163 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1167 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1173 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1174 * won't be used for replay.
1176 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1178 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1180 if (nfserr
== nfserr_replay_me
)
1183 if (!seqid_mutating_err(ntohl(nfserr
))) {
1184 nfsd4_cstate_clear_replay(cstate
);
1189 if (so
->so_is_open_owner
)
1190 release_last_closed_stateid(openowner(so
));
1196 gen_sessionid(struct nfsd4_session
*ses
)
1198 struct nfs4_client
*clp
= ses
->se_client
;
1199 struct nfsd4_sessionid
*sid
;
1201 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1202 sid
->clientid
= clp
->cl_clientid
;
1203 sid
->sequence
= current_sessionid
++;
1208 * The protocol defines ca_maxresponssize_cached to include the size of
1209 * the rpc header, but all we need to cache is the data starting after
1210 * the end of the initial SEQUENCE operation--the rest we regenerate
1211 * each time. Therefore we can advertise a ca_maxresponssize_cached
1212 * value that is the number of bytes in our cache plus a few additional
1213 * bytes. In order to stay on the safe side, and not promise more than
1214 * we can cache, those additional bytes must be the minimum possible: 24
1215 * bytes of rpc header (xid through accept state, with AUTH_NULL
1216 * verifier), 12 for the compound header (with zero-length tag), and 44
1217 * for the SEQUENCE op response:
1219 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1222 free_session_slots(struct nfsd4_session
*ses
)
1226 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
1227 kfree(ses
->se_slots
[i
]);
1231 * We don't actually need to cache the rpc and session headers, so we
1232 * can allocate a little less for each slot:
1234 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1238 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1241 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1242 return size
+ sizeof(struct nfsd4_slot
);
1246 * XXX: If we run out of reserved DRC memory we could (up to a point)
1247 * re-negotiate active sessions and reduce their slot usage to make
1248 * room for new connections. For now we just fail the create session.
1250 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1252 u32 slotsize
= slot_bytes(ca
);
1253 u32 num
= ca
->maxreqs
;
1256 spin_lock(&nfsd_drc_lock
);
1257 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1258 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1259 num
= min_t(int, num
, avail
/ slotsize
);
1260 nfsd_drc_mem_used
+= num
* slotsize
;
1261 spin_unlock(&nfsd_drc_lock
);
1266 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1268 int slotsize
= slot_bytes(ca
);
1270 spin_lock(&nfsd_drc_lock
);
1271 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1272 spin_unlock(&nfsd_drc_lock
);
1275 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1276 struct nfsd4_channel_attrs
*battrs
)
1278 int numslots
= fattrs
->maxreqs
;
1279 int slotsize
= slot_bytes(fattrs
);
1280 struct nfsd4_session
*new;
1283 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1284 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1285 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1287 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1290 /* allocate each struct nfsd4_slot and data cache in one piece */
1291 for (i
= 0; i
< numslots
; i
++) {
1292 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1293 if (!new->se_slots
[i
])
1297 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1298 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1303 kfree(new->se_slots
[i
]);
1308 static void free_conn(struct nfsd4_conn
*c
)
1310 svc_xprt_put(c
->cn_xprt
);
1314 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1316 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1317 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1319 spin_lock(&clp
->cl_lock
);
1320 if (!list_empty(&c
->cn_persession
)) {
1321 list_del(&c
->cn_persession
);
1324 nfsd4_probe_callback(clp
);
1325 spin_unlock(&clp
->cl_lock
);
1328 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1330 struct nfsd4_conn
*conn
;
1332 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1335 svc_xprt_get(rqstp
->rq_xprt
);
1336 conn
->cn_xprt
= rqstp
->rq_xprt
;
1337 conn
->cn_flags
= flags
;
1338 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1342 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1344 conn
->cn_session
= ses
;
1345 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1348 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1350 struct nfs4_client
*clp
= ses
->se_client
;
1352 spin_lock(&clp
->cl_lock
);
1353 __nfsd4_hash_conn(conn
, ses
);
1354 spin_unlock(&clp
->cl_lock
);
1357 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1359 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1360 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1363 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1367 nfsd4_hash_conn(conn
, ses
);
1368 ret
= nfsd4_register_conn(conn
);
1370 /* oops; xprt is already down: */
1371 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1372 /* We may have gained or lost a callback channel: */
1373 nfsd4_probe_callback_sync(ses
->se_client
);
1376 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1378 u32 dir
= NFS4_CDFC4_FORE
;
1380 if (cses
->flags
& SESSION4_BACK_CHAN
)
1381 dir
|= NFS4_CDFC4_BACK
;
1382 return alloc_conn(rqstp
, dir
);
1385 /* must be called under client_lock */
1386 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1388 struct nfs4_client
*clp
= s
->se_client
;
1389 struct nfsd4_conn
*c
;
1391 spin_lock(&clp
->cl_lock
);
1392 while (!list_empty(&s
->se_conns
)) {
1393 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1394 list_del_init(&c
->cn_persession
);
1395 spin_unlock(&clp
->cl_lock
);
1397 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1400 spin_lock(&clp
->cl_lock
);
1402 spin_unlock(&clp
->cl_lock
);
1405 static void __free_session(struct nfsd4_session
*ses
)
1407 free_session_slots(ses
);
1411 static void free_session(struct nfsd4_session
*ses
)
1413 nfsd4_del_conns(ses
);
1414 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1415 __free_session(ses
);
1418 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1421 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1423 new->se_client
= clp
;
1426 INIT_LIST_HEAD(&new->se_conns
);
1428 new->se_cb_seq_nr
= 1;
1429 new->se_flags
= cses
->flags
;
1430 new->se_cb_prog
= cses
->callback_prog
;
1431 new->se_cb_sec
= cses
->cb_sec
;
1432 atomic_set(&new->se_ref
, 0);
1433 idx
= hash_sessionid(&new->se_sessionid
);
1434 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1435 spin_lock(&clp
->cl_lock
);
1436 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1437 spin_unlock(&clp
->cl_lock
);
1439 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1440 struct sockaddr
*sa
= svc_addr(rqstp
);
1442 * This is a little silly; with sessions there's no real
1443 * use for the callback address. Use the peer address
1444 * as a reasonable default for now, but consider fixing
1445 * the rpc client not to require an address in the
1448 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1449 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1453 /* caller must hold client_lock */
1454 static struct nfsd4_session
*
1455 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1457 struct nfsd4_session
*elem
;
1459 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1461 lockdep_assert_held(&nn
->client_lock
);
1463 dump_sessionid(__func__
, sessionid
);
1464 idx
= hash_sessionid(sessionid
);
1465 /* Search in the appropriate list */
1466 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1467 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1468 NFS4_MAX_SESSIONID_LEN
)) {
1473 dprintk("%s: session not found\n", __func__
);
1477 static struct nfsd4_session
*
1478 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1481 struct nfsd4_session
*session
;
1482 __be32 status
= nfserr_badsession
;
1484 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1487 status
= nfsd4_get_session_locked(session
);
1495 /* caller must hold client_lock */
1497 unhash_session(struct nfsd4_session
*ses
)
1499 struct nfs4_client
*clp
= ses
->se_client
;
1500 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1502 lockdep_assert_held(&nn
->client_lock
);
1504 list_del(&ses
->se_hash
);
1505 spin_lock(&ses
->se_client
->cl_lock
);
1506 list_del(&ses
->se_perclnt
);
1507 spin_unlock(&ses
->se_client
->cl_lock
);
1510 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1512 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1514 if (clid
->cl_boot
== nn
->boot_time
)
1516 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1517 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1522 * XXX Should we use a slab cache ?
1523 * This type of memory management is somewhat inefficient, but we use it
1524 * anyway since SETCLIENTID is not a common operation.
1526 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1528 struct nfs4_client
*clp
;
1531 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1534 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1535 if (clp
->cl_name
.data
== NULL
)
1537 clp
->cl_ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
1538 OWNER_HASH_SIZE
, GFP_KERNEL
);
1539 if (!clp
->cl_ownerstr_hashtbl
)
1540 goto err_no_hashtbl
;
1541 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1542 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1543 clp
->cl_name
.len
= name
.len
;
1544 INIT_LIST_HEAD(&clp
->cl_sessions
);
1545 idr_init(&clp
->cl_stateids
);
1546 atomic_set(&clp
->cl_refcount
, 0);
1547 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1548 INIT_LIST_HEAD(&clp
->cl_idhash
);
1549 INIT_LIST_HEAD(&clp
->cl_openowners
);
1550 INIT_LIST_HEAD(&clp
->cl_delegations
);
1551 INIT_LIST_HEAD(&clp
->cl_lru
);
1552 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1553 INIT_LIST_HEAD(&clp
->cl_revoked
);
1554 spin_lock_init(&clp
->cl_lock
);
1555 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1558 kfree(clp
->cl_name
.data
);
1565 free_client(struct nfs4_client
*clp
)
1567 while (!list_empty(&clp
->cl_sessions
)) {
1568 struct nfsd4_session
*ses
;
1569 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1571 list_del(&ses
->se_perclnt
);
1572 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1575 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1576 free_svc_cred(&clp
->cl_cred
);
1577 kfree(clp
->cl_ownerstr_hashtbl
);
1578 kfree(clp
->cl_name
.data
);
1579 idr_destroy(&clp
->cl_stateids
);
1583 /* must be called under the client_lock */
1585 unhash_client_locked(struct nfs4_client
*clp
)
1587 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1588 struct nfsd4_session
*ses
;
1590 lockdep_assert_held(&nn
->client_lock
);
1592 /* Mark the client as expired! */
1594 /* Make it invisible */
1595 if (!list_empty(&clp
->cl_idhash
)) {
1596 list_del_init(&clp
->cl_idhash
);
1597 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1598 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1600 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1602 list_del_init(&clp
->cl_lru
);
1603 spin_lock(&clp
->cl_lock
);
1604 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1605 list_del_init(&ses
->se_hash
);
1606 spin_unlock(&clp
->cl_lock
);
1610 unhash_client(struct nfs4_client
*clp
)
1612 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1614 spin_lock(&nn
->client_lock
);
1615 unhash_client_locked(clp
);
1616 spin_unlock(&nn
->client_lock
);
1619 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1621 if (atomic_read(&clp
->cl_refcount
))
1622 return nfserr_jukebox
;
1623 unhash_client_locked(clp
);
1628 __destroy_client(struct nfs4_client
*clp
)
1630 struct nfs4_openowner
*oo
;
1631 struct nfs4_delegation
*dp
;
1632 struct list_head reaplist
;
1634 INIT_LIST_HEAD(&reaplist
);
1635 spin_lock(&state_lock
);
1636 while (!list_empty(&clp
->cl_delegations
)) {
1637 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1638 unhash_delegation_locked(dp
);
1639 list_add(&dp
->dl_recall_lru
, &reaplist
);
1641 spin_unlock(&state_lock
);
1642 while (!list_empty(&reaplist
)) {
1643 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1644 list_del_init(&dp
->dl_recall_lru
);
1645 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
1646 nfs4_put_stid(&dp
->dl_stid
);
1648 while (!list_empty(&clp
->cl_revoked
)) {
1649 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1650 list_del_init(&dp
->dl_recall_lru
);
1651 nfs4_put_stid(&dp
->dl_stid
);
1653 while (!list_empty(&clp
->cl_openowners
)) {
1654 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1655 nfs4_get_stateowner(&oo
->oo_owner
);
1656 release_openowner(oo
);
1658 nfsd4_shutdown_callback(clp
);
1659 if (clp
->cl_cb_conn
.cb_xprt
)
1660 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1665 destroy_client(struct nfs4_client
*clp
)
1668 __destroy_client(clp
);
1671 static void expire_client(struct nfs4_client
*clp
)
1674 nfsd4_client_record_remove(clp
);
1675 __destroy_client(clp
);
1678 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1680 memcpy(target
->cl_verifier
.data
, source
->data
,
1681 sizeof(target
->cl_verifier
.data
));
1684 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1686 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1687 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1690 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1692 if (source
->cr_principal
) {
1693 target
->cr_principal
=
1694 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1695 if (target
->cr_principal
== NULL
)
1698 target
->cr_principal
= NULL
;
1699 target
->cr_flavor
= source
->cr_flavor
;
1700 target
->cr_uid
= source
->cr_uid
;
1701 target
->cr_gid
= source
->cr_gid
;
1702 target
->cr_group_info
= source
->cr_group_info
;
1703 get_group_info(target
->cr_group_info
);
1704 target
->cr_gss_mech
= source
->cr_gss_mech
;
1705 if (source
->cr_gss_mech
)
1706 gss_mech_get(source
->cr_gss_mech
);
1711 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1715 res
= o1
->len
- o2
->len
;
1718 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1721 static int same_name(const char *n1
, const char *n2
)
1723 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1727 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1729 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1733 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1735 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1738 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1742 if (g1
->ngroups
!= g2
->ngroups
)
1744 for (i
=0; i
<g1
->ngroups
; i
++)
1745 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1751 * RFC 3530 language requires clid_inuse be returned when the
1752 * "principal" associated with a requests differs from that previously
1753 * used. We use uid, gid's, and gss principal string as our best
1754 * approximation. We also don't want to allow non-gss use of a client
1755 * established using gss: in theory cr_principal should catch that
1756 * change, but in practice cr_principal can be null even in the gss case
1757 * since gssd doesn't always pass down a principal string.
1759 static bool is_gss_cred(struct svc_cred
*cr
)
1761 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1762 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1767 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1769 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1770 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1771 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1772 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1774 if (cr1
->cr_principal
== cr2
->cr_principal
)
1776 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1778 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1781 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1783 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1786 if (!cr
->cr_gss_mech
)
1788 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1789 return service
== RPC_GSS_SVC_INTEGRITY
||
1790 service
== RPC_GSS_SVC_PRIVACY
;
1793 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1795 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1797 if (!cl
->cl_mach_cred
)
1799 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1801 if (!svc_rqst_integrity_protected(rqstp
))
1803 if (!cr
->cr_principal
)
1805 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1808 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1813 * This is opaque to client, so no need to byte-swap. Use
1814 * __force to keep sparse happy
1816 verf
[0] = (__force __be32
)get_seconds();
1817 verf
[1] = (__force __be32
)nn
->clientid_counter
;
1818 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1821 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1823 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1824 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
1825 gen_confirm(clp
, nn
);
1828 static struct nfs4_stid
*
1829 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
1831 struct nfs4_stid
*ret
;
1833 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1834 if (!ret
|| !ret
->sc_type
)
1839 static struct nfs4_stid
*
1840 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1842 struct nfs4_stid
*s
;
1844 spin_lock(&cl
->cl_lock
);
1845 s
= find_stateid_locked(cl
, t
);
1847 if (typemask
& s
->sc_type
)
1848 atomic_inc(&s
->sc_count
);
1852 spin_unlock(&cl
->cl_lock
);
1856 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1857 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1859 struct nfs4_client
*clp
;
1860 struct sockaddr
*sa
= svc_addr(rqstp
);
1862 struct net
*net
= SVC_NET(rqstp
);
1864 clp
= alloc_client(name
);
1868 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1873 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_run_cb_null
);
1874 clp
->cl_time
= get_seconds();
1875 clear_bit(0, &clp
->cl_cb_slot_busy
);
1876 copy_verf(clp
, verf
);
1877 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1878 clp
->cl_cb_session
= NULL
;
1884 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1886 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1887 struct nfs4_client
*clp
;
1890 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1893 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1894 new = &((*new)->rb_left
);
1896 new = &((*new)->rb_right
);
1899 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1900 rb_insert_color(&new_clp
->cl_namenode
, root
);
1903 static struct nfs4_client
*
1904 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1907 struct rb_node
*node
= root
->rb_node
;
1908 struct nfs4_client
*clp
;
1911 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1912 cmp
= compare_blob(&clp
->cl_name
, name
);
1914 node
= node
->rb_left
;
1916 node
= node
->rb_right
;
1924 add_to_unconfirmed(struct nfs4_client
*clp
)
1926 unsigned int idhashval
;
1927 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1929 lockdep_assert_held(&nn
->client_lock
);
1931 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1932 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1933 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1934 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1935 renew_client_locked(clp
);
1939 move_to_confirmed(struct nfs4_client
*clp
)
1941 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1942 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1944 lockdep_assert_held(&nn
->client_lock
);
1946 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1947 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1948 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1949 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1950 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1951 renew_client_locked(clp
);
1954 static struct nfs4_client
*
1955 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1957 struct nfs4_client
*clp
;
1958 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1960 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1961 if (same_clid(&clp
->cl_clientid
, clid
)) {
1962 if ((bool)clp
->cl_minorversion
!= sessions
)
1964 renew_client_locked(clp
);
1971 static struct nfs4_client
*
1972 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1974 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1976 lockdep_assert_held(&nn
->client_lock
);
1977 return find_client_in_id_table(tbl
, clid
, sessions
);
1980 static struct nfs4_client
*
1981 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1983 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1985 lockdep_assert_held(&nn
->client_lock
);
1986 return find_client_in_id_table(tbl
, clid
, sessions
);
1989 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1991 return clp
->cl_exchange_flags
!= 0;
1994 static struct nfs4_client
*
1995 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1997 lockdep_assert_held(&nn
->client_lock
);
1998 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
2001 static struct nfs4_client
*
2002 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2004 lockdep_assert_held(&nn
->client_lock
);
2005 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2009 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2011 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2012 struct sockaddr
*sa
= svc_addr(rqstp
);
2013 u32 scopeid
= rpc_get_scope_id(sa
);
2014 unsigned short expected_family
;
2016 /* Currently, we only support tcp and tcp6 for the callback channel */
2017 if (se
->se_callback_netid_len
== 3 &&
2018 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2019 expected_family
= AF_INET
;
2020 else if (se
->se_callback_netid_len
== 4 &&
2021 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2022 expected_family
= AF_INET6
;
2026 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2027 se
->se_callback_addr_len
,
2028 (struct sockaddr
*)&conn
->cb_addr
,
2029 sizeof(conn
->cb_addr
));
2031 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2034 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2035 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2037 conn
->cb_prog
= se
->se_callback_prog
;
2038 conn
->cb_ident
= se
->se_callback_ident
;
2039 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2042 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2043 conn
->cb_addrlen
= 0;
2044 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
2045 "will not receive delegations\n",
2046 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2052 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2055 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2057 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2058 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2061 dprintk("--> %s slot %p\n", __func__
, slot
);
2063 slot
->sl_opcnt
= resp
->opcnt
;
2064 slot
->sl_status
= resp
->cstate
.status
;
2066 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2067 if (nfsd4_not_cached(resp
)) {
2068 slot
->sl_datalen
= 0;
2071 base
= resp
->cstate
.data_offset
;
2072 slot
->sl_datalen
= buf
->len
- base
;
2073 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2074 WARN("%s: sessions DRC could not cache compound\n", __func__
);
2079 * Encode the replay sequence operation from the slot values.
2080 * If cachethis is FALSE encode the uncached rep error on the next
2081 * operation which sets resp->p and increments resp->opcnt for
2082 * nfs4svc_encode_compoundres.
2086 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2087 struct nfsd4_compoundres
*resp
)
2089 struct nfsd4_op
*op
;
2090 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2092 /* Encode the replayed sequence operation */
2093 op
= &args
->ops
[resp
->opcnt
- 1];
2094 nfsd4_encode_operation(resp
, op
);
2096 /* Return nfserr_retry_uncached_rep in next operation. */
2097 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
2098 op
= &args
->ops
[resp
->opcnt
++];
2099 op
->status
= nfserr_retry_uncached_rep
;
2100 nfsd4_encode_operation(resp
, op
);
2106 * The sequence operation is not cached because we can use the slot and
2110 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2111 struct nfsd4_sequence
*seq
)
2113 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2114 struct xdr_stream
*xdr
= &resp
->xdr
;
2118 dprintk("--> %s slot %p\n", __func__
, slot
);
2120 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2124 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2127 return nfserr_serverfault
;
2129 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2130 xdr_commit_encode(xdr
);
2132 resp
->opcnt
= slot
->sl_opcnt
;
2133 return slot
->sl_status
;
2137 * Set the exchange_id flags returned by the server.
2140 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2142 /* pNFS is not supported */
2143 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2145 /* Referrals are supported, Migration is not. */
2146 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2148 /* set the wire flags to return to client. */
2149 clid
->flags
= new->cl_exchange_flags
;
2152 static bool client_has_state(struct nfs4_client
*clp
)
2155 * Note clp->cl_openowners check isn't quite right: there's no
2156 * need to count owners without stateid's.
2158 * Also note we should probably be using this in 4.0 case too.
2160 return !list_empty(&clp
->cl_openowners
)
2161 || !list_empty(&clp
->cl_delegations
)
2162 || !list_empty(&clp
->cl_sessions
);
2166 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
2167 struct nfsd4_compound_state
*cstate
,
2168 struct nfsd4_exchange_id
*exid
)
2170 struct nfs4_client
*conf
, *new;
2171 struct nfs4_client
*unconf
= NULL
;
2173 char addr_str
[INET6_ADDRSTRLEN
];
2174 nfs4_verifier verf
= exid
->verifier
;
2175 struct sockaddr
*sa
= svc_addr(rqstp
);
2176 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2177 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2179 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2180 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2181 "ip_addr=%s flags %x, spa_how %d\n",
2182 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2183 addr_str
, exid
->flags
, exid
->spa_how
);
2185 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2186 return nfserr_inval
;
2188 switch (exid
->spa_how
) {
2190 if (!svc_rqst_integrity_protected(rqstp
))
2191 return nfserr_inval
;
2194 default: /* checked by xdr code */
2197 return nfserr_encr_alg_unsupp
;
2200 new = create_client(exid
->clname
, rqstp
, &verf
);
2202 return nfserr_jukebox
;
2204 /* Cases below refer to rfc 5661 section 18.35.4: */
2205 spin_lock(&nn
->client_lock
);
2206 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2208 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2209 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2212 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2213 status
= nfserr_inval
;
2216 if (!mach_creds_match(conf
, rqstp
)) {
2217 status
= nfserr_wrong_cred
;
2220 if (!creds_match
) { /* case 9 */
2221 status
= nfserr_perm
;
2224 if (!verfs_match
) { /* case 8 */
2225 status
= nfserr_not_same
;
2229 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2232 if (!creds_match
) { /* case 3 */
2233 if (client_has_state(conf
)) {
2234 status
= nfserr_clid_inuse
;
2239 if (verfs_match
) { /* case 2 */
2240 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2243 /* case 5, client reboot */
2248 if (update
) { /* case 7 */
2249 status
= nfserr_noent
;
2253 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2254 if (unconf
) /* case 4, possible retry or client restart */
2255 unhash_client_locked(unconf
);
2257 /* case 1 (normal case) */
2260 status
= mark_client_expired_locked(conf
);
2264 new->cl_minorversion
= cstate
->minorversion
;
2265 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
2268 add_to_unconfirmed(new);
2271 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2272 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2274 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2275 nfsd4_set_ex_flags(conf
, exid
);
2277 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2278 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2282 spin_unlock(&nn
->client_lock
);
2286 expire_client(unconf
);
2291 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2293 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2296 /* The slot is in use, and no response has been sent. */
2298 if (seqid
== slot_seqid
)
2299 return nfserr_jukebox
;
2301 return nfserr_seq_misordered
;
2303 /* Note unsigned 32-bit arithmetic handles wraparound: */
2304 if (likely(seqid
== slot_seqid
+ 1))
2306 if (seqid
== slot_seqid
)
2307 return nfserr_replay_cache
;
2308 return nfserr_seq_misordered
;
2312 * Cache the create session result into the create session single DRC
2313 * slot cache by saving the xdr structure. sl_seqid has been set.
2314 * Do this for solo or embedded create session operations.
2317 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2318 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2320 slot
->sl_status
= nfserr
;
2321 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2325 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2326 struct nfsd4_clid_slot
*slot
)
2328 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2329 return slot
->sl_status
;
2332 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2333 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2334 1 + /* MIN tag is length with zero, only length */ \
2335 3 + /* version, opcount, opcode */ \
2336 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2337 /* seqid, slotID, slotID, cache */ \
2338 4 ) * sizeof(__be32))
2340 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2341 2 + /* verifier: AUTH_NULL, length 0 */\
2343 1 + /* MIN tag is length with zero, only length */ \
2344 3 + /* opcount, opcode, opstatus*/ \
2345 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2346 /* seqid, slotID, slotID, slotID, status */ \
2347 5 ) * sizeof(__be32))
2349 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2351 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2353 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2354 return nfserr_toosmall
;
2355 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2356 return nfserr_toosmall
;
2357 ca
->headerpadsz
= 0;
2358 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2359 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2360 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2361 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2362 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2363 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2365 * Note decreasing slot size below client's request may make it
2366 * difficult for client to function correctly, whereas
2367 * decreasing the number of slots will (just?) affect
2368 * performance. When short on memory we therefore prefer to
2369 * decrease number of slots instead of their size. Clients that
2370 * request larger slots than they need will get poor results:
2372 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2374 return nfserr_jukebox
;
2379 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2380 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2381 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2382 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2384 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2386 ca
->headerpadsz
= 0;
2389 * These RPC_MAX_HEADER macros are overkill, especially since we
2390 * don't even do gss on the backchannel yet. But this is still
2391 * less than 1k. Tighten up this estimate in the unlikely event
2392 * it turns out to be a problem for some client:
2394 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2395 return nfserr_toosmall
;
2396 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2397 return nfserr_toosmall
;
2398 ca
->maxresp_cached
= 0;
2400 return nfserr_toosmall
;
2405 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2407 switch (cbs
->flavor
) {
2413 * GSS case: the spec doesn't allow us to return this
2414 * error. But it also doesn't allow us not to support
2416 * I'd rather this fail hard than return some error the
2417 * client might think it can already handle:
2419 return nfserr_encr_alg_unsupp
;
2424 nfsd4_create_session(struct svc_rqst
*rqstp
,
2425 struct nfsd4_compound_state
*cstate
,
2426 struct nfsd4_create_session
*cr_ses
)
2428 struct sockaddr
*sa
= svc_addr(rqstp
);
2429 struct nfs4_client
*conf
, *unconf
;
2430 struct nfs4_client
*old
= NULL
;
2431 struct nfsd4_session
*new;
2432 struct nfsd4_conn
*conn
;
2433 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2435 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2437 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2438 return nfserr_inval
;
2439 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2442 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2445 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2447 goto out_release_drc_mem
;
2448 status
= nfserr_jukebox
;
2449 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2451 goto out_release_drc_mem
;
2452 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2454 goto out_free_session
;
2456 spin_lock(&nn
->client_lock
);
2457 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2458 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2459 WARN_ON_ONCE(conf
&& unconf
);
2462 status
= nfserr_wrong_cred
;
2463 if (!mach_creds_match(conf
, rqstp
))
2465 cs_slot
= &conf
->cl_cs_slot
;
2466 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2467 if (status
== nfserr_replay_cache
) {
2468 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2470 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
2471 status
= nfserr_seq_misordered
;
2474 } else if (unconf
) {
2475 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2476 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2477 status
= nfserr_clid_inuse
;
2480 status
= nfserr_wrong_cred
;
2481 if (!mach_creds_match(unconf
, rqstp
))
2483 cs_slot
= &unconf
->cl_cs_slot
;
2484 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2486 /* an unconfirmed replay returns misordered */
2487 status
= nfserr_seq_misordered
;
2490 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2492 status
= mark_client_expired_locked(old
);
2498 move_to_confirmed(unconf
);
2501 status
= nfserr_stale_clientid
;
2506 * We do not support RDMA or persistent sessions
2508 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2509 cr_ses
->flags
&= ~SESSION4_RDMA
;
2511 init_session(rqstp
, new, conf
, cr_ses
);
2512 nfsd4_get_session_locked(new);
2514 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2515 NFS4_MAX_SESSIONID_LEN
);
2516 cs_slot
->sl_seqid
++;
2517 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2519 /* cache solo and embedded create sessions under the client_lock */
2520 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2521 spin_unlock(&nn
->client_lock
);
2522 /* init connection and backchannel */
2523 nfsd4_init_conn(rqstp
, conn
, new);
2524 nfsd4_put_session(new);
2529 spin_unlock(&nn
->client_lock
);
2534 __free_session(new);
2535 out_release_drc_mem
:
2536 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2540 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2543 case NFS4_CDFC4_FORE
:
2544 case NFS4_CDFC4_BACK
:
2546 case NFS4_CDFC4_FORE_OR_BOTH
:
2547 case NFS4_CDFC4_BACK_OR_BOTH
:
2548 *dir
= NFS4_CDFC4_BOTH
;
2551 return nfserr_inval
;
2554 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2556 struct nfsd4_session
*session
= cstate
->session
;
2557 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2560 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2563 spin_lock(&nn
->client_lock
);
2564 session
->se_cb_prog
= bc
->bc_cb_program
;
2565 session
->se_cb_sec
= bc
->bc_cb_sec
;
2566 spin_unlock(&nn
->client_lock
);
2568 nfsd4_probe_callback(session
->se_client
);
2573 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2574 struct nfsd4_compound_state
*cstate
,
2575 struct nfsd4_bind_conn_to_session
*bcts
)
2578 struct nfsd4_conn
*conn
;
2579 struct nfsd4_session
*session
;
2580 struct net
*net
= SVC_NET(rqstp
);
2581 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2583 if (!nfsd4_last_compound_op(rqstp
))
2584 return nfserr_not_only_op
;
2585 spin_lock(&nn
->client_lock
);
2586 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2587 spin_unlock(&nn
->client_lock
);
2589 goto out_no_session
;
2590 status
= nfserr_wrong_cred
;
2591 if (!mach_creds_match(session
->se_client
, rqstp
))
2593 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2596 conn
= alloc_conn(rqstp
, bcts
->dir
);
2597 status
= nfserr_jukebox
;
2600 nfsd4_init_conn(rqstp
, conn
, session
);
2603 nfsd4_put_session(session
);
2608 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2612 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2616 nfsd4_destroy_session(struct svc_rqst
*r
,
2617 struct nfsd4_compound_state
*cstate
,
2618 struct nfsd4_destroy_session
*sessionid
)
2620 struct nfsd4_session
*ses
;
2622 int ref_held_by_me
= 0;
2623 struct net
*net
= SVC_NET(r
);
2624 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2626 status
= nfserr_not_only_op
;
2627 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2628 if (!nfsd4_last_compound_op(r
))
2632 dump_sessionid(__func__
, &sessionid
->sessionid
);
2633 spin_lock(&nn
->client_lock
);
2634 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2636 goto out_client_lock
;
2637 status
= nfserr_wrong_cred
;
2638 if (!mach_creds_match(ses
->se_client
, r
))
2639 goto out_put_session
;
2640 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2642 goto out_put_session
;
2643 unhash_session(ses
);
2644 spin_unlock(&nn
->client_lock
);
2646 nfsd4_probe_callback_sync(ses
->se_client
);
2648 spin_lock(&nn
->client_lock
);
2651 nfsd4_put_session_locked(ses
);
2653 spin_unlock(&nn
->client_lock
);
2658 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2660 struct nfsd4_conn
*c
;
2662 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2663 if (c
->cn_xprt
== xpt
) {
2670 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2672 struct nfs4_client
*clp
= ses
->se_client
;
2673 struct nfsd4_conn
*c
;
2674 __be32 status
= nfs_ok
;
2677 spin_lock(&clp
->cl_lock
);
2678 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2681 status
= nfserr_conn_not_bound_to_session
;
2682 if (clp
->cl_mach_cred
)
2684 __nfsd4_hash_conn(new, ses
);
2685 spin_unlock(&clp
->cl_lock
);
2686 ret
= nfsd4_register_conn(new);
2688 /* oops; xprt is already down: */
2689 nfsd4_conn_lost(&new->cn_xpt_user
);
2692 spin_unlock(&clp
->cl_lock
);
2697 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2699 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2701 return args
->opcnt
> session
->se_fchannel
.maxops
;
2704 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2705 struct nfsd4_session
*session
)
2707 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2709 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2713 nfsd4_sequence(struct svc_rqst
*rqstp
,
2714 struct nfsd4_compound_state
*cstate
,
2715 struct nfsd4_sequence
*seq
)
2717 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2718 struct xdr_stream
*xdr
= &resp
->xdr
;
2719 struct nfsd4_session
*session
;
2720 struct nfs4_client
*clp
;
2721 struct nfsd4_slot
*slot
;
2722 struct nfsd4_conn
*conn
;
2725 struct net
*net
= SVC_NET(rqstp
);
2726 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2728 if (resp
->opcnt
!= 1)
2729 return nfserr_sequence_pos
;
2732 * Will be either used or freed by nfsd4_sequence_check_conn
2735 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2737 return nfserr_jukebox
;
2739 spin_lock(&nn
->client_lock
);
2740 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
2742 goto out_no_session
;
2743 clp
= session
->se_client
;
2745 status
= nfserr_too_many_ops
;
2746 if (nfsd4_session_too_many_ops(rqstp
, session
))
2747 goto out_put_session
;
2749 status
= nfserr_req_too_big
;
2750 if (nfsd4_request_too_big(rqstp
, session
))
2751 goto out_put_session
;
2753 status
= nfserr_badslot
;
2754 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2755 goto out_put_session
;
2757 slot
= session
->se_slots
[seq
->slotid
];
2758 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2760 /* We do not negotiate the number of slots yet, so set the
2761 * maxslots to the session maxreqs which is used to encode
2762 * sr_highest_slotid and the sr_target_slot id to maxslots */
2763 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2765 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2766 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2767 if (status
== nfserr_replay_cache
) {
2768 status
= nfserr_seq_misordered
;
2769 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2770 goto out_put_session
;
2771 cstate
->slot
= slot
;
2772 cstate
->session
= session
;
2774 /* Return the cached reply status and set cstate->status
2775 * for nfsd4_proc_compound processing */
2776 status
= nfsd4_replay_cache_entry(resp
, seq
);
2777 cstate
->status
= nfserr_replay_cache
;
2781 goto out_put_session
;
2783 status
= nfsd4_sequence_check_conn(conn
, session
);
2786 goto out_put_session
;
2788 buflen
= (seq
->cachethis
) ?
2789 session
->se_fchannel
.maxresp_cached
:
2790 session
->se_fchannel
.maxresp_sz
;
2791 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2793 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2794 goto out_put_session
;
2795 svc_reserve(rqstp
, buflen
);
2798 /* Success! bump slot seqid */
2799 slot
->sl_seqid
= seq
->seqid
;
2800 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2802 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2804 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2806 cstate
->slot
= slot
;
2807 cstate
->session
= session
;
2811 switch (clp
->cl_cb_state
) {
2813 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2815 case NFSD4_CB_FAULT
:
2816 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2819 seq
->status_flags
= 0;
2821 if (!list_empty(&clp
->cl_revoked
))
2822 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2826 spin_unlock(&nn
->client_lock
);
2829 nfsd4_put_session_locked(session
);
2830 goto out_no_session
;
2834 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
2836 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
2838 if (nfsd4_has_session(cs
)) {
2839 if (cs
->status
!= nfserr_replay_cache
) {
2840 nfsd4_store_cache_entry(resp
);
2841 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
2843 /* Drop session reference that was taken in nfsd4_sequence() */
2844 nfsd4_put_session(cs
->session
);
2846 put_client_renew(cs
->clp
);
2850 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2852 struct nfs4_client
*conf
, *unconf
;
2853 struct nfs4_client
*clp
= NULL
;
2855 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2857 spin_lock(&nn
->client_lock
);
2858 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2859 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2860 WARN_ON_ONCE(conf
&& unconf
);
2863 if (client_has_state(conf
)) {
2864 status
= nfserr_clientid_busy
;
2867 status
= mark_client_expired_locked(conf
);
2874 status
= nfserr_stale_clientid
;
2877 if (!mach_creds_match(clp
, rqstp
)) {
2879 status
= nfserr_wrong_cred
;
2882 unhash_client_locked(clp
);
2884 spin_unlock(&nn
->client_lock
);
2891 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2895 if (rc
->rca_one_fs
) {
2896 if (!cstate
->current_fh
.fh_dentry
)
2897 return nfserr_nofilehandle
;
2899 * We don't take advantage of the rca_one_fs case.
2900 * That's OK, it's optional, we can safely ignore it.
2905 status
= nfserr_complete_already
;
2906 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2907 &cstate
->session
->se_client
->cl_flags
))
2910 status
= nfserr_stale_clientid
;
2911 if (is_client_expired(cstate
->session
->se_client
))
2913 * The following error isn't really legal.
2914 * But we only get here if the client just explicitly
2915 * destroyed the client. Surely it no longer cares what
2916 * error it gets back on an operation for the dead
2922 nfsd4_client_record_create(cstate
->session
->se_client
);
2928 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2929 struct nfsd4_setclientid
*setclid
)
2931 struct xdr_netobj clname
= setclid
->se_name
;
2932 nfs4_verifier clverifier
= setclid
->se_verf
;
2933 struct nfs4_client
*conf
, *new;
2934 struct nfs4_client
*unconf
= NULL
;
2936 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2938 new = create_client(clname
, rqstp
, &clverifier
);
2940 return nfserr_jukebox
;
2941 /* Cases below refer to rfc 3530 section 14.2.33: */
2942 spin_lock(&nn
->client_lock
);
2943 conf
= find_confirmed_client_by_name(&clname
, nn
);
2946 status
= nfserr_clid_inuse
;
2947 if (clp_used_exchangeid(conf
))
2949 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2950 char addr_str
[INET6_ADDRSTRLEN
];
2951 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2953 dprintk("NFSD: setclientid: string in use by client "
2954 "at %s\n", addr_str
);
2958 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2960 unhash_client_locked(unconf
);
2961 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2962 /* case 1: probable callback update */
2963 copy_clid(new, conf
);
2964 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2966 new->cl_minorversion
= 0;
2967 gen_callback(new, setclid
, rqstp
);
2968 add_to_unconfirmed(new);
2969 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2970 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2971 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2975 spin_unlock(&nn
->client_lock
);
2979 expire_client(unconf
);
2985 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2986 struct nfsd4_compound_state
*cstate
,
2987 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2989 struct nfs4_client
*conf
, *unconf
;
2990 struct nfs4_client
*old
= NULL
;
2991 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2992 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2994 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2996 if (STALE_CLIENTID(clid
, nn
))
2997 return nfserr_stale_clientid
;
2999 spin_lock(&nn
->client_lock
);
3000 conf
= find_confirmed_client(clid
, false, nn
);
3001 unconf
= find_unconfirmed_client(clid
, false, nn
);
3003 * We try hard to give out unique clientid's, so if we get an
3004 * attempt to confirm the same clientid with a different cred,
3005 * there's a bug somewhere. Let's charitably assume it's our
3008 status
= nfserr_serverfault
;
3009 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3011 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3013 /* cases below refer to rfc 3530 section 14.2.34: */
3014 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3015 if (conf
&& !unconf
) /* case 2: probable retransmit */
3017 else /* case 4: client hasn't noticed we rebooted yet? */
3018 status
= nfserr_stale_clientid
;
3022 if (conf
) { /* case 1: callback update */
3024 unhash_client_locked(old
);
3025 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3026 } else { /* case 3: normal case; new or rebooted client */
3027 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3029 status
= mark_client_expired_locked(old
);
3035 move_to_confirmed(unconf
);
3038 get_client_locked(conf
);
3039 spin_unlock(&nn
->client_lock
);
3040 nfsd4_probe_callback(conf
);
3041 spin_lock(&nn
->client_lock
);
3042 put_client_renew_locked(conf
);
3044 spin_unlock(&nn
->client_lock
);
3050 static struct nfs4_file
*nfsd4_alloc_file(void)
3052 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3055 /* OPEN Share state helper functions */
3056 static void nfsd4_init_file(struct nfs4_file
*fp
, struct knfsd_fh
*fh
)
3058 unsigned int hashval
= file_hashval(fh
);
3060 lockdep_assert_held(&state_lock
);
3062 atomic_set(&fp
->fi_ref
, 1);
3063 spin_lock_init(&fp
->fi_lock
);
3064 INIT_LIST_HEAD(&fp
->fi_stateids
);
3065 INIT_LIST_HEAD(&fp
->fi_delegations
);
3066 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3067 fp
->fi_deleg_file
= NULL
;
3068 fp
->fi_had_conflict
= false;
3069 fp
->fi_share_deny
= 0;
3070 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3071 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3072 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3076 nfsd4_free_slabs(void)
3078 kmem_cache_destroy(openowner_slab
);
3079 kmem_cache_destroy(lockowner_slab
);
3080 kmem_cache_destroy(file_slab
);
3081 kmem_cache_destroy(stateid_slab
);
3082 kmem_cache_destroy(deleg_slab
);
3086 nfsd4_init_slabs(void)
3088 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3089 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3090 if (openowner_slab
== NULL
)
3092 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3093 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3094 if (lockowner_slab
== NULL
)
3095 goto out_free_openowner_slab
;
3096 file_slab
= kmem_cache_create("nfsd4_files",
3097 sizeof(struct nfs4_file
), 0, 0, NULL
);
3098 if (file_slab
== NULL
)
3099 goto out_free_lockowner_slab
;
3100 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3101 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3102 if (stateid_slab
== NULL
)
3103 goto out_free_file_slab
;
3104 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3105 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3106 if (deleg_slab
== NULL
)
3107 goto out_free_stateid_slab
;
3110 out_free_stateid_slab
:
3111 kmem_cache_destroy(stateid_slab
);
3113 kmem_cache_destroy(file_slab
);
3114 out_free_lockowner_slab
:
3115 kmem_cache_destroy(lockowner_slab
);
3116 out_free_openowner_slab
:
3117 kmem_cache_destroy(openowner_slab
);
3119 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3123 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3125 rp
->rp_status
= nfserr_serverfault
;
3127 rp
->rp_buf
= rp
->rp_ibuf
;
3128 mutex_init(&rp
->rp_mutex
);
3131 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3132 struct nfs4_stateowner
*so
)
3134 if (!nfsd4_has_session(cstate
)) {
3135 mutex_lock(&so
->so_replay
.rp_mutex
);
3136 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3140 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3142 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3145 cstate
->replay_owner
= NULL
;
3146 mutex_unlock(&so
->so_replay
.rp_mutex
);
3147 nfs4_put_stateowner(so
);
3151 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3153 struct nfs4_stateowner
*sop
;
3155 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3159 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3160 if (!sop
->so_owner
.data
) {
3161 kmem_cache_free(slab
, sop
);
3164 sop
->so_owner
.len
= owner
->len
;
3166 INIT_LIST_HEAD(&sop
->so_stateids
);
3167 sop
->so_client
= clp
;
3168 init_nfs4_replay(&sop
->so_replay
);
3169 atomic_set(&sop
->so_count
, 1);
3173 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3175 lockdep_assert_held(&clp
->cl_lock
);
3177 list_add(&oo
->oo_owner
.so_strhash
,
3178 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3179 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3182 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3184 unhash_openowner_locked(openowner(so
));
3187 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3189 struct nfs4_openowner
*oo
= openowner(so
);
3191 kmem_cache_free(openowner_slab
, oo
);
3194 static const struct nfs4_stateowner_operations openowner_ops
= {
3195 .so_unhash
= nfs4_unhash_openowner
,
3196 .so_free
= nfs4_free_openowner
,
3199 static struct nfs4_openowner
*
3200 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3201 struct nfsd4_compound_state
*cstate
)
3203 struct nfs4_client
*clp
= cstate
->clp
;
3204 struct nfs4_openowner
*oo
, *ret
;
3206 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3209 oo
->oo_owner
.so_ops
= &openowner_ops
;
3210 oo
->oo_owner
.so_is_open_owner
= 1;
3211 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3213 if (nfsd4_has_session(cstate
))
3214 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3216 oo
->oo_last_closed_stid
= NULL
;
3217 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3218 spin_lock(&clp
->cl_lock
);
3219 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3221 hash_openowner(oo
, clp
, strhashval
);
3224 nfs4_free_openowner(&oo
->oo_owner
);
3225 spin_unlock(&clp
->cl_lock
);
3229 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
3230 struct nfs4_openowner
*oo
= open
->op_openowner
;
3232 atomic_inc(&stp
->st_stid
.sc_count
);
3233 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3234 INIT_LIST_HEAD(&stp
->st_locks
);
3235 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3237 stp
->st_stid
.sc_file
= fp
;
3238 stp
->st_access_bmap
= 0;
3239 stp
->st_deny_bmap
= 0;
3240 stp
->st_openstp
= NULL
;
3241 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3242 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3243 spin_lock(&fp
->fi_lock
);
3244 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3245 spin_unlock(&fp
->fi_lock
);
3246 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3250 * In the 4.0 case we need to keep the owners around a little while to handle
3251 * CLOSE replay. We still do need to release any file access that is held by
3252 * them before returning however.
3255 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3257 struct nfs4_ol_stateid
*last
;
3258 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3259 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3262 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3265 * We know that we hold one reference via nfsd4_close, and another
3266 * "persistent" reference for the client. If the refcount is higher
3267 * than 2, then there are still calls in progress that are using this
3268 * stateid. We can't put the sc_file reference until they are finished.
3269 * Wait for the refcount to drop to 2. Since it has been unhashed,
3270 * there should be no danger of the refcount going back up again at
3273 wait_event(close_wq
, atomic_read(&s
->st_stid
.sc_count
) == 2);
3275 release_all_access(s
);
3276 if (s
->st_stid
.sc_file
) {
3277 put_nfs4_file(s
->st_stid
.sc_file
);
3278 s
->st_stid
.sc_file
= NULL
;
3281 spin_lock(&nn
->client_lock
);
3282 last
= oo
->oo_last_closed_stid
;
3283 oo
->oo_last_closed_stid
= s
;
3284 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3285 oo
->oo_time
= get_seconds();
3286 spin_unlock(&nn
->client_lock
);
3288 nfs4_put_stid(&last
->st_stid
);
3291 /* search file_hashtbl[] for file */
3292 static struct nfs4_file
*
3293 find_file_locked(struct knfsd_fh
*fh
)
3295 unsigned int hashval
= file_hashval(fh
);
3296 struct nfs4_file
*fp
;
3298 lockdep_assert_held(&state_lock
);
3300 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3301 if (nfsd_fh_match(&fp
->fi_fhandle
, fh
)) {
3309 static struct nfs4_file
*
3310 find_file(struct knfsd_fh
*fh
)
3312 struct nfs4_file
*fp
;
3314 spin_lock(&state_lock
);
3315 fp
= find_file_locked(fh
);
3316 spin_unlock(&state_lock
);
3320 static struct nfs4_file
*
3321 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3323 struct nfs4_file
*fp
;
3325 spin_lock(&state_lock
);
3326 fp
= find_file_locked(fh
);
3328 nfsd4_init_file(new, fh
);
3331 spin_unlock(&state_lock
);
3337 * Called to check deny when READ with all zero stateid or
3338 * WRITE with all zero or all one stateid
3341 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3343 struct nfs4_file
*fp
;
3344 __be32 ret
= nfs_ok
;
3346 fp
= find_file(¤t_fh
->fh_handle
);
3349 /* Check for conflicting share reservations */
3350 spin_lock(&fp
->fi_lock
);
3351 if (fp
->fi_share_deny
& deny_type
)
3352 ret
= nfserr_locked
;
3353 spin_unlock(&fp
->fi_lock
);
3358 void nfsd4_prepare_cb_recall(struct nfs4_delegation
*dp
)
3360 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3363 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3366 * We can't do this in nfsd_break_deleg_cb because it is
3367 * already holding inode->i_lock.
3369 * If the dl_time != 0, then we know that it has already been
3370 * queued for a lease break. Don't queue it again.
3372 spin_lock(&state_lock
);
3373 if (dp
->dl_time
== 0) {
3374 dp
->dl_time
= get_seconds();
3375 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3377 spin_unlock(&state_lock
);
3380 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3383 * We're assuming the state code never drops its reference
3384 * without first removing the lease. Since we're in this lease
3385 * callback (and since the lease code is serialized by the kernel
3386 * lock) we know the server hasn't removed the lease yet, we know
3387 * it's safe to take a reference.
3389 atomic_inc(&dp
->dl_stid
.sc_count
);
3390 nfsd4_cb_recall(dp
);
3393 /* Called from break_lease() with i_lock held. */
3395 nfsd_break_deleg_cb(struct file_lock
*fl
)
3398 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
3399 struct nfs4_delegation
*dp
;
3402 WARN(1, "(%p)->fl_owner NULL\n", fl
);
3405 if (fp
->fi_had_conflict
) {
3406 WARN(1, "duplicate break on %p\n", fp
);
3410 * We don't want the locks code to timeout the lease for us;
3411 * we'll remove it ourself if a delegation isn't returned
3414 fl
->fl_break_time
= 0;
3416 spin_lock(&fp
->fi_lock
);
3417 fp
->fi_had_conflict
= true;
3419 * If there are no delegations on the list, then return true
3420 * so that the lease code will go ahead and delete it.
3422 if (list_empty(&fp
->fi_delegations
))
3425 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
3426 nfsd_break_one_deleg(dp
);
3427 spin_unlock(&fp
->fi_lock
);
3432 nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
, struct list_head
*dispose
)
3435 return lease_modify(onlist
, arg
, dispose
);
3440 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3441 .lm_break
= nfsd_break_deleg_cb
,
3442 .lm_change
= nfsd_change_deleg_cb
,
3445 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3447 if (nfsd4_has_session(cstate
))
3449 if (seqid
== so
->so_seqid
- 1)
3450 return nfserr_replay_me
;
3451 if (seqid
== so
->so_seqid
)
3453 return nfserr_bad_seqid
;
3456 static __be32
lookup_clientid(clientid_t
*clid
,
3457 struct nfsd4_compound_state
*cstate
,
3458 struct nfsd_net
*nn
)
3460 struct nfs4_client
*found
;
3463 found
= cstate
->clp
;
3464 if (!same_clid(&found
->cl_clientid
, clid
))
3465 return nfserr_stale_clientid
;
3469 if (STALE_CLIENTID(clid
, nn
))
3470 return nfserr_stale_clientid
;
3473 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3474 * cached already then we know this is for is for v4.0 and "sessions"
3477 WARN_ON_ONCE(cstate
->session
);
3478 spin_lock(&nn
->client_lock
);
3479 found
= find_confirmed_client(clid
, false, nn
);
3481 spin_unlock(&nn
->client_lock
);
3482 return nfserr_expired
;
3484 atomic_inc(&found
->cl_refcount
);
3485 spin_unlock(&nn
->client_lock
);
3487 /* Cache the nfs4_client in cstate! */
3488 cstate
->clp
= found
;
3493 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3494 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3496 clientid_t
*clientid
= &open
->op_clientid
;
3497 struct nfs4_client
*clp
= NULL
;
3498 unsigned int strhashval
;
3499 struct nfs4_openowner
*oo
= NULL
;
3502 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3503 return nfserr_stale_clientid
;
3505 * In case we need it later, after we've already created the
3506 * file and don't want to risk a further failure:
3508 open
->op_file
= nfsd4_alloc_file();
3509 if (open
->op_file
== NULL
)
3510 return nfserr_jukebox
;
3512 status
= lookup_clientid(clientid
, cstate
, nn
);
3517 strhashval
= ownerstr_hashval(&open
->op_owner
);
3518 oo
= find_openstateowner_str(strhashval
, open
, clp
);
3519 open
->op_openowner
= oo
;
3523 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3524 /* Replace unconfirmed owners without checking for replay. */
3525 release_openowner(oo
);
3526 open
->op_openowner
= NULL
;
3529 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3534 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3536 return nfserr_jukebox
;
3537 open
->op_openowner
= oo
;
3539 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
3541 return nfserr_jukebox
;
3545 static inline __be32
3546 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3548 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3549 return nfserr_openmode
;
3554 static int share_access_to_flags(u32 share_access
)
3556 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3559 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3561 struct nfs4_stid
*ret
;
3563 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3566 return delegstateid(ret
);
3569 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3571 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3572 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3576 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3577 struct nfs4_delegation
**dp
)
3580 __be32 status
= nfserr_bad_stateid
;
3581 struct nfs4_delegation
*deleg
;
3583 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3586 flags
= share_access_to_flags(open
->op_share_access
);
3587 status
= nfs4_check_delegmode(deleg
, flags
);
3589 nfs4_put_stid(&deleg
->dl_stid
);
3594 if (!nfsd4_is_deleg_cur(open
))
3598 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3602 static struct nfs4_ol_stateid
*
3603 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3605 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3606 struct nfs4_openowner
*oo
= open
->op_openowner
;
3608 spin_lock(&fp
->fi_lock
);
3609 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3610 /* ignore lock owners */
3611 if (local
->st_stateowner
->so_is_open_owner
== 0)
3613 if (local
->st_stateowner
== &oo
->oo_owner
) {
3615 atomic_inc(&ret
->st_stid
.sc_count
);
3619 spin_unlock(&fp
->fi_lock
);
3623 static inline int nfs4_access_to_access(u32 nfs4_access
)
3627 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3628 flags
|= NFSD_MAY_READ
;
3629 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3630 flags
|= NFSD_MAY_WRITE
;
3634 static inline __be32
3635 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3636 struct nfsd4_open
*open
)
3638 struct iattr iattr
= {
3639 .ia_valid
= ATTR_SIZE
,
3642 if (!open
->op_truncate
)
3644 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3645 return nfserr_inval
;
3646 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3649 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3650 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
3651 struct nfsd4_open
*open
)
3653 struct file
*filp
= NULL
;
3655 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3656 int access
= nfs4_access_to_access(open
->op_share_access
);
3657 unsigned char old_access_bmap
, old_deny_bmap
;
3659 spin_lock(&fp
->fi_lock
);
3662 * Are we trying to set a deny mode that would conflict with
3665 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3666 if (status
!= nfs_ok
) {
3667 spin_unlock(&fp
->fi_lock
);
3671 /* set access to the file */
3672 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
3673 if (status
!= nfs_ok
) {
3674 spin_unlock(&fp
->fi_lock
);
3678 /* Set access bits in stateid */
3679 old_access_bmap
= stp
->st_access_bmap
;
3680 set_access(open
->op_share_access
, stp
);
3682 /* Set new deny mask */
3683 old_deny_bmap
= stp
->st_deny_bmap
;
3684 set_deny(open
->op_share_deny
, stp
);
3685 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3687 if (!fp
->fi_fds
[oflag
]) {
3688 spin_unlock(&fp
->fi_lock
);
3689 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
3691 goto out_put_access
;
3692 spin_lock(&fp
->fi_lock
);
3693 if (!fp
->fi_fds
[oflag
]) {
3694 fp
->fi_fds
[oflag
] = filp
;
3698 spin_unlock(&fp
->fi_lock
);
3702 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3704 goto out_put_access
;
3708 stp
->st_access_bmap
= old_access_bmap
;
3709 nfs4_file_put_access(fp
, open
->op_share_access
);
3710 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
3715 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
)
3718 unsigned char old_deny_bmap
;
3720 if (!test_access(open
->op_share_access
, stp
))
3721 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
3723 /* test and set deny mode */
3724 spin_lock(&fp
->fi_lock
);
3725 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3726 if (status
== nfs_ok
) {
3727 old_deny_bmap
= stp
->st_deny_bmap
;
3728 set_deny(open
->op_share_deny
, stp
);
3729 fp
->fi_share_deny
|=
3730 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3732 spin_unlock(&fp
->fi_lock
);
3734 if (status
!= nfs_ok
)
3737 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3738 if (status
!= nfs_ok
)
3739 reset_union_bmap_deny(old_deny_bmap
, stp
);
3744 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3746 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3749 /* Should we give out recallable state?: */
3750 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3752 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3755 * In the sessions case, since we don't have to establish a
3756 * separate connection for callbacks, we assume it's OK
3757 * until we hear otherwise:
3759 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3762 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_file
*fp
, int flag
)
3764 struct file_lock
*fl
;
3766 fl
= locks_alloc_lock();
3769 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3770 fl
->fl_flags
= FL_DELEG
;
3771 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3772 fl
->fl_end
= OFFSET_MAX
;
3773 fl
->fl_owner
= (fl_owner_t
)fp
;
3774 fl
->fl_pid
= current
->tgid
;
3778 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3780 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
3781 struct file_lock
*fl
, *ret
;
3785 fl
= nfs4_alloc_init_lease(fp
, NFS4_OPEN_DELEGATE_READ
);
3788 filp
= find_readable_file(fp
);
3790 /* We should always have a readable file here */
3796 status
= vfs_setlease(filp
, fl
->fl_type
, &fl
, NULL
);
3798 locks_free_lock(fl
);
3801 spin_lock(&state_lock
);
3802 spin_lock(&fp
->fi_lock
);
3803 /* Did the lease get broken before we took the lock? */
3805 if (fp
->fi_had_conflict
)
3808 if (fp
->fi_deleg_file
) {
3810 atomic_inc(&fp
->fi_delegees
);
3811 hash_delegation_locked(dp
, fp
);
3814 fp
->fi_deleg_file
= filp
;
3815 atomic_set(&fp
->fi_delegees
, 1);
3816 hash_delegation_locked(dp
, fp
);
3817 spin_unlock(&fp
->fi_lock
);
3818 spin_unlock(&state_lock
);
3821 spin_unlock(&fp
->fi_lock
);
3822 spin_unlock(&state_lock
);
3828 static struct nfs4_delegation
*
3829 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
3830 struct nfs4_file
*fp
)
3833 struct nfs4_delegation
*dp
;
3835 if (fp
->fi_had_conflict
)
3836 return ERR_PTR(-EAGAIN
);
3838 dp
= alloc_init_deleg(clp
, fh
);
3840 return ERR_PTR(-ENOMEM
);
3843 spin_lock(&state_lock
);
3844 spin_lock(&fp
->fi_lock
);
3845 dp
->dl_stid
.sc_file
= fp
;
3846 if (!fp
->fi_deleg_file
) {
3847 spin_unlock(&fp
->fi_lock
);
3848 spin_unlock(&state_lock
);
3849 status
= nfs4_setlease(dp
);
3852 atomic_inc(&fp
->fi_delegees
);
3853 if (fp
->fi_had_conflict
) {
3857 hash_delegation_locked(dp
, fp
);
3860 spin_unlock(&fp
->fi_lock
);
3861 spin_unlock(&state_lock
);
3864 nfs4_put_stid(&dp
->dl_stid
);
3865 return ERR_PTR(status
);
3870 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3872 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3873 if (status
== -EAGAIN
)
3874 open
->op_why_no_deleg
= WND4_CONTENTION
;
3876 open
->op_why_no_deleg
= WND4_RESOURCE
;
3877 switch (open
->op_deleg_want
) {
3878 case NFS4_SHARE_WANT_READ_DELEG
:
3879 case NFS4_SHARE_WANT_WRITE_DELEG
:
3880 case NFS4_SHARE_WANT_ANY_DELEG
:
3882 case NFS4_SHARE_WANT_CANCEL
:
3883 open
->op_why_no_deleg
= WND4_CANCELLED
;
3885 case NFS4_SHARE_WANT_NO_DELEG
:
3892 * Attempt to hand out a delegation.
3894 * Note we don't support write delegations, and won't until the vfs has
3895 * proper support for them.
3898 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
3899 struct nfs4_ol_stateid
*stp
)
3901 struct nfs4_delegation
*dp
;
3902 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
3903 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
3907 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3908 open
->op_recall
= 0;
3909 switch (open
->op_claim_type
) {
3910 case NFS4_OPEN_CLAIM_PREVIOUS
:
3912 open
->op_recall
= 1;
3913 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3916 case NFS4_OPEN_CLAIM_NULL
:
3917 case NFS4_OPEN_CLAIM_FH
:
3919 * Let's not give out any delegations till everyone's
3920 * had the chance to reclaim theirs....
3922 if (locks_in_grace(clp
->net
))
3924 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3927 * Also, if the file was opened for write or
3928 * create, there's a good chance the client's
3929 * about to write to it, resulting in an
3930 * immediate recall (since we don't support
3931 * write delegations):
3933 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3935 if (open
->op_create
== NFS4_OPEN_CREATE
)
3941 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
);
3945 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3947 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3948 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3949 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3950 nfs4_put_stid(&dp
->dl_stid
);
3953 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3954 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3955 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3956 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3957 open
->op_recall
= 1;
3960 /* 4.1 client asking for a delegation? */
3961 if (open
->op_deleg_want
)
3962 nfsd4_open_deleg_none_ext(open
, status
);
3966 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3967 struct nfs4_delegation
*dp
)
3969 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3970 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3971 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3972 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3973 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3974 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3975 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3976 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3978 /* Otherwise the client must be confused wanting a delegation
3979 * it already has, therefore we don't return
3980 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3985 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3987 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3988 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3989 struct nfs4_file
*fp
= NULL
;
3990 struct nfs4_ol_stateid
*stp
= NULL
;
3991 struct nfs4_delegation
*dp
= NULL
;
3995 * Lookup file; if found, lookup stateid and check open request,
3996 * and check for delegations in the process of being recalled.
3997 * If not found, create the nfs4_file struct
3999 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4000 if (fp
!= open
->op_file
) {
4001 status
= nfs4_check_deleg(cl
, open
, &dp
);
4004 stp
= nfsd4_find_existing_open(fp
, open
);
4006 open
->op_file
= NULL
;
4007 status
= nfserr_bad_stateid
;
4008 if (nfsd4_is_deleg_cur(open
))
4010 status
= nfserr_jukebox
;
4014 * OPEN the file, or upgrade an existing OPEN.
4015 * If truncate fails, the OPEN fails.
4018 /* Stateid was found, this is an OPEN upgrade */
4019 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4024 open
->op_stp
= NULL
;
4025 init_open_stateid(stp
, fp
, open
);
4026 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4028 release_open_stateid(stp
);
4032 update_stateid(&stp
->st_stid
.sc_stateid
);
4033 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4035 if (nfsd4_has_session(&resp
->cstate
)) {
4036 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4037 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4038 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4044 * Attempt to hand out a delegation. No error return, because the
4045 * OPEN succeeds even if we fail.
4047 nfs4_open_delegation(current_fh
, open
, stp
);
4051 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4052 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4054 /* 4.1 client trying to upgrade/downgrade delegation? */
4055 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4056 open
->op_deleg_want
)
4057 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4061 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4062 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
4064 * To finish the open response, we just need to set the rflags.
4066 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4067 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
4068 !nfsd4_has_session(&resp
->cstate
))
4069 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4071 nfs4_put_stid(&dp
->dl_stid
);
4073 nfs4_put_stid(&stp
->st_stid
);
4078 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4079 struct nfsd4_open
*open
, __be32 status
)
4081 if (open
->op_openowner
) {
4082 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4084 nfsd4_cstate_assign_replay(cstate
, so
);
4085 nfs4_put_stateowner(so
);
4088 nfsd4_free_file(open
->op_file
);
4090 nfs4_put_stid(&open
->op_stp
->st_stid
);
4094 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4097 struct nfs4_client
*clp
;
4099 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4101 dprintk("process_renew(%08x/%08x): starting\n",
4102 clid
->cl_boot
, clid
->cl_id
);
4103 status
= lookup_clientid(clid
, cstate
, nn
);
4107 status
= nfserr_cb_path_down
;
4108 if (!list_empty(&clp
->cl_delegations
)
4109 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4117 nfsd4_end_grace(struct nfsd_net
*nn
)
4119 /* do nothing if grace period already ended */
4120 if (nn
->grace_ended
)
4123 dprintk("NFSD: end of grace period\n");
4124 nn
->grace_ended
= true;
4125 nfsd4_record_grace_done(nn
, nn
->boot_time
);
4126 locks_end_grace(&nn
->nfsd4_manager
);
4128 * Now that every NFSv4 client has had the chance to recover and
4129 * to see the (possibly new, possibly shorter) lease time, we
4130 * can safely set the next grace time to the current lease time:
4132 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
4136 nfs4_laundromat(struct nfsd_net
*nn
)
4138 struct nfs4_client
*clp
;
4139 struct nfs4_openowner
*oo
;
4140 struct nfs4_delegation
*dp
;
4141 struct nfs4_ol_stateid
*stp
;
4142 struct list_head
*pos
, *next
, reaplist
;
4143 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4144 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4146 dprintk("NFSD: laundromat service - starting\n");
4147 nfsd4_end_grace(nn
);
4148 INIT_LIST_HEAD(&reaplist
);
4149 spin_lock(&nn
->client_lock
);
4150 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4151 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4152 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4153 t
= clp
->cl_time
- cutoff
;
4154 new_timeo
= min(new_timeo
, t
);
4157 if (mark_client_expired_locked(clp
)) {
4158 dprintk("NFSD: client in use (clientid %08x)\n",
4159 clp
->cl_clientid
.cl_id
);
4162 list_add(&clp
->cl_lru
, &reaplist
);
4164 spin_unlock(&nn
->client_lock
);
4165 list_for_each_safe(pos
, next
, &reaplist
) {
4166 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4167 dprintk("NFSD: purging unused client (clientid %08x)\n",
4168 clp
->cl_clientid
.cl_id
);
4169 list_del_init(&clp
->cl_lru
);
4172 spin_lock(&state_lock
);
4173 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4174 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4175 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
4177 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4178 t
= dp
->dl_time
- cutoff
;
4179 new_timeo
= min(new_timeo
, t
);
4182 unhash_delegation_locked(dp
);
4183 list_add(&dp
->dl_recall_lru
, &reaplist
);
4185 spin_unlock(&state_lock
);
4186 while (!list_empty(&reaplist
)) {
4187 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4189 list_del_init(&dp
->dl_recall_lru
);
4190 revoke_delegation(dp
);
4193 spin_lock(&nn
->client_lock
);
4194 while (!list_empty(&nn
->close_lru
)) {
4195 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4197 if (time_after((unsigned long)oo
->oo_time
,
4198 (unsigned long)cutoff
)) {
4199 t
= oo
->oo_time
- cutoff
;
4200 new_timeo
= min(new_timeo
, t
);
4203 list_del_init(&oo
->oo_close_lru
);
4204 stp
= oo
->oo_last_closed_stid
;
4205 oo
->oo_last_closed_stid
= NULL
;
4206 spin_unlock(&nn
->client_lock
);
4207 nfs4_put_stid(&stp
->st_stid
);
4208 spin_lock(&nn
->client_lock
);
4210 spin_unlock(&nn
->client_lock
);
4212 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4216 static struct workqueue_struct
*laundry_wq
;
4217 static void laundromat_main(struct work_struct
*);
4220 laundromat_main(struct work_struct
*laundry
)
4223 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
4225 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4228 t
= nfs4_laundromat(nn
);
4229 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4230 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4233 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
4235 if (!nfsd_fh_match(&fhp
->fh_handle
, &stp
->st_stid
.sc_file
->fi_fhandle
))
4236 return nfserr_bad_stateid
;
4241 access_permit_read(struct nfs4_ol_stateid
*stp
)
4243 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4244 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4245 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4249 access_permit_write(struct nfs4_ol_stateid
*stp
)
4251 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4252 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4256 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4258 __be32 status
= nfserr_openmode
;
4260 /* For lock stateid's, we test the parent open, not the lock: */
4261 if (stp
->st_openstp
)
4262 stp
= stp
->st_openstp
;
4263 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4265 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4272 static inline __be32
4273 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4275 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4277 else if (locks_in_grace(net
)) {
4278 /* Answer in remaining cases depends on existence of
4279 * conflicting state; so we must wait out the grace period. */
4280 return nfserr_grace
;
4281 } else if (flags
& WR_STATE
)
4282 return nfs4_share_conflict(current_fh
,
4283 NFS4_SHARE_DENY_WRITE
);
4284 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4285 return nfs4_share_conflict(current_fh
,
4286 NFS4_SHARE_DENY_READ
);
4290 * Allow READ/WRITE during grace period on recovered state only for files
4291 * that are not able to provide mandatory locking.
4294 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4296 return locks_in_grace(net
) && mandatory_lock(inode
);
4299 /* Returns true iff a is later than b: */
4300 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
4302 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
4305 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4308 * When sessions are used the stateid generation number is ignored
4311 if (has_session
&& in
->si_generation
== 0)
4314 if (in
->si_generation
== ref
->si_generation
)
4317 /* If the client sends us a stateid from the future, it's buggy: */
4318 if (stateid_generation_after(in
, ref
))
4319 return nfserr_bad_stateid
;
4321 * However, we could see a stateid from the past, even from a
4322 * non-buggy client. For example, if the client sends a lock
4323 * while some IO is outstanding, the lock may bump si_generation
4324 * while the IO is still in flight. The client could avoid that
4325 * situation by waiting for responses on all the IO requests,
4326 * but better performance may result in retrying IO that
4327 * receives an old_stateid error if requests are rarely
4328 * reordered in flight:
4330 return nfserr_old_stateid
;
4333 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4335 struct nfs4_stid
*s
;
4336 struct nfs4_ol_stateid
*ols
;
4337 __be32 status
= nfserr_bad_stateid
;
4339 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4341 /* Client debugging aid. */
4342 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4343 char addr_str
[INET6_ADDRSTRLEN
];
4344 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4346 pr_warn_ratelimited("NFSD: client %s testing state ID "
4347 "with incorrect client ID\n", addr_str
);
4350 spin_lock(&cl
->cl_lock
);
4351 s
= find_stateid_locked(cl
, stateid
);
4354 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4357 switch (s
->sc_type
) {
4358 case NFS4_DELEG_STID
:
4361 case NFS4_REVOKED_DELEG_STID
:
4362 status
= nfserr_deleg_revoked
;
4364 case NFS4_OPEN_STID
:
4365 case NFS4_LOCK_STID
:
4366 ols
= openlockstateid(s
);
4367 if (ols
->st_stateowner
->so_is_open_owner
4368 && !(openowner(ols
->st_stateowner
)->oo_flags
4369 & NFS4_OO_CONFIRMED
))
4370 status
= nfserr_bad_stateid
;
4375 printk("unknown stateid type %x\n", s
->sc_type
);
4377 case NFS4_CLOSED_STID
:
4378 case NFS4_CLOSED_DELEG_STID
:
4379 status
= nfserr_bad_stateid
;
4382 spin_unlock(&cl
->cl_lock
);
4387 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4388 stateid_t
*stateid
, unsigned char typemask
,
4389 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4393 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4394 return nfserr_bad_stateid
;
4395 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
4396 if (status
== nfserr_stale_clientid
) {
4397 if (cstate
->session
)
4398 return nfserr_bad_stateid
;
4399 return nfserr_stale_stateid
;
4403 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
4405 return nfserr_bad_stateid
;
4410 * Checks for stateid operations
4413 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
4414 stateid_t
*stateid
, int flags
, struct file
**filpp
)
4416 struct nfs4_stid
*s
;
4417 struct nfs4_ol_stateid
*stp
= NULL
;
4418 struct nfs4_delegation
*dp
= NULL
;
4419 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4420 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
4421 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4422 struct file
*file
= NULL
;
4428 if (grace_disallows_io(net
, ino
))
4429 return nfserr_grace
;
4431 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4432 return check_special_stateids(net
, current_fh
, stateid
, flags
);
4434 status
= nfsd4_lookup_stateid(cstate
, stateid
,
4435 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
4439 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
4442 switch (s
->sc_type
) {
4443 case NFS4_DELEG_STID
:
4444 dp
= delegstateid(s
);
4445 status
= nfs4_check_delegmode(dp
, flags
);
4449 file
= dp
->dl_stid
.sc_file
->fi_deleg_file
;
4452 status
= nfserr_serverfault
;
4458 case NFS4_OPEN_STID
:
4459 case NFS4_LOCK_STID
:
4460 stp
= openlockstateid(s
);
4461 status
= nfs4_check_fh(current_fh
, stp
);
4464 if (stp
->st_stateowner
->so_is_open_owner
4465 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4467 status
= nfs4_check_openmode(stp
, flags
);
4471 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
4473 if (flags
& RD_STATE
)
4474 file
= find_readable_file(fp
);
4476 file
= find_writeable_file(fp
);
4480 status
= nfserr_bad_stateid
;
4492 * Test if the stateid is valid
4495 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4496 struct nfsd4_test_stateid
*test_stateid
)
4498 struct nfsd4_test_stateid_id
*stateid
;
4499 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4501 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
4502 stateid
->ts_id_status
=
4503 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
4509 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4510 struct nfsd4_free_stateid
*free_stateid
)
4512 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
4513 struct nfs4_stid
*s
;
4514 struct nfs4_delegation
*dp
;
4515 struct nfs4_ol_stateid
*stp
;
4516 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4517 __be32 ret
= nfserr_bad_stateid
;
4519 spin_lock(&cl
->cl_lock
);
4520 s
= find_stateid_locked(cl
, stateid
);
4523 switch (s
->sc_type
) {
4524 case NFS4_DELEG_STID
:
4525 ret
= nfserr_locks_held
;
4527 case NFS4_OPEN_STID
:
4528 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4531 ret
= nfserr_locks_held
;
4533 case NFS4_LOCK_STID
:
4534 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4537 stp
= openlockstateid(s
);
4538 ret
= nfserr_locks_held
;
4539 if (check_for_locks(stp
->st_stid
.sc_file
,
4540 lockowner(stp
->st_stateowner
)))
4542 unhash_lock_stateid(stp
);
4543 spin_unlock(&cl
->cl_lock
);
4547 case NFS4_REVOKED_DELEG_STID
:
4548 dp
= delegstateid(s
);
4549 list_del_init(&dp
->dl_recall_lru
);
4550 spin_unlock(&cl
->cl_lock
);
4554 /* Default falls through and returns nfserr_bad_stateid */
4557 spin_unlock(&cl
->cl_lock
);
4565 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
4566 RD_STATE
: WR_STATE
;
4569 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
4571 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4572 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
4575 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
4578 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
4579 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
4581 * "Closed" stateid's exist *only* to return
4582 * nfserr_replay_me from the previous step, and
4583 * revoked delegations are kept only for free_stateid.
4585 return nfserr_bad_stateid
;
4586 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4589 return nfs4_check_fh(current_fh
, stp
);
4593 * Checks for sequence id mutating operations.
4596 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4597 stateid_t
*stateid
, char typemask
,
4598 struct nfs4_ol_stateid
**stpp
,
4599 struct nfsd_net
*nn
)
4602 struct nfs4_stid
*s
;
4603 struct nfs4_ol_stateid
*stp
= NULL
;
4605 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
4606 seqid
, STATEID_VAL(stateid
));
4609 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
4612 stp
= openlockstateid(s
);
4613 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
4615 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
4619 nfs4_put_stid(&stp
->st_stid
);
4623 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4624 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
4627 struct nfs4_openowner
*oo
;
4628 struct nfs4_ol_stateid
*stp
;
4630 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
4631 NFS4_OPEN_STID
, &stp
, nn
);
4634 oo
= openowner(stp
->st_stateowner
);
4635 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
4636 nfs4_put_stid(&stp
->st_stid
);
4637 return nfserr_bad_stateid
;
4644 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4645 struct nfsd4_open_confirm
*oc
)
4648 struct nfs4_openowner
*oo
;
4649 struct nfs4_ol_stateid
*stp
;
4650 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4652 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4653 cstate
->current_fh
.fh_dentry
);
4655 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
4659 status
= nfs4_preprocess_seqid_op(cstate
,
4660 oc
->oc_seqid
, &oc
->oc_req_stateid
,
4661 NFS4_OPEN_STID
, &stp
, nn
);
4664 oo
= openowner(stp
->st_stateowner
);
4665 status
= nfserr_bad_stateid
;
4666 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
4668 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
4669 update_stateid(&stp
->st_stid
.sc_stateid
);
4670 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4671 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
4672 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4674 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
4677 nfs4_put_stid(&stp
->st_stid
);
4679 nfsd4_bump_seqid(cstate
, status
);
4683 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
4685 if (!test_access(access
, stp
))
4687 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
4688 clear_access(access
, stp
);
4691 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
4693 switch (to_access
) {
4694 case NFS4_SHARE_ACCESS_READ
:
4695 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
4696 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4698 case NFS4_SHARE_ACCESS_WRITE
:
4699 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
4700 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4702 case NFS4_SHARE_ACCESS_BOTH
:
4710 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
4711 struct nfsd4_compound_state
*cstate
,
4712 struct nfsd4_open_downgrade
*od
)
4715 struct nfs4_ol_stateid
*stp
;
4716 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4718 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4719 cstate
->current_fh
.fh_dentry
);
4721 /* We don't yet support WANT bits: */
4722 if (od
->od_deleg_want
)
4723 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
4726 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
4727 &od
->od_stateid
, &stp
, nn
);
4730 status
= nfserr_inval
;
4731 if (!test_access(od
->od_share_access
, stp
)) {
4732 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
4733 stp
->st_access_bmap
, od
->od_share_access
);
4736 if (!test_deny(od
->od_share_deny
, stp
)) {
4737 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
4738 stp
->st_deny_bmap
, od
->od_share_deny
);
4741 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
4743 reset_union_bmap_deny(od
->od_share_deny
, stp
);
4745 update_stateid(&stp
->st_stid
.sc_stateid
);
4746 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4749 nfs4_put_stid(&stp
->st_stid
);
4751 nfsd4_bump_seqid(cstate
, status
);
4755 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4757 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
4758 LIST_HEAD(reaplist
);
4760 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4761 spin_lock(&clp
->cl_lock
);
4762 unhash_open_stateid(s
, &reaplist
);
4764 if (clp
->cl_minorversion
) {
4765 put_ol_stateid_locked(s
, &reaplist
);
4766 spin_unlock(&clp
->cl_lock
);
4767 free_ol_stateid_reaplist(&reaplist
);
4769 spin_unlock(&clp
->cl_lock
);
4770 free_ol_stateid_reaplist(&reaplist
);
4771 move_to_close_lru(s
, clp
->net
);
4776 * nfs4_unlock_state() called after encode
4779 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4780 struct nfsd4_close
*close
)
4783 struct nfs4_ol_stateid
*stp
;
4784 struct net
*net
= SVC_NET(rqstp
);
4785 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4787 dprintk("NFSD: nfsd4_close on file %pd\n",
4788 cstate
->current_fh
.fh_dentry
);
4790 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4792 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4794 nfsd4_bump_seqid(cstate
, status
);
4797 update_stateid(&stp
->st_stid
.sc_stateid
);
4798 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4800 nfsd4_close_open_stateid(stp
);
4802 /* put reference from nfs4_preprocess_seqid_op */
4803 nfs4_put_stid(&stp
->st_stid
);
4809 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4810 struct nfsd4_delegreturn
*dr
)
4812 struct nfs4_delegation
*dp
;
4813 stateid_t
*stateid
= &dr
->dr_stateid
;
4814 struct nfs4_stid
*s
;
4816 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4818 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4821 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
4824 dp
= delegstateid(s
);
4825 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4829 destroy_delegation(dp
);
4831 nfs4_put_stid(&dp
->dl_stid
);
4837 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4840 end_offset(u64 start
, u64 len
)
4845 return end
>= start
? end
: NFS4_MAX_UINT64
;
4848 /* last octet in a range */
4850 last_byte_offset(u64 start
, u64 len
)
4856 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4860 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4861 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4862 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4863 * locking, this prevents us from being completely protocol-compliant. The
4864 * real solution to this problem is to start using unsigned file offsets in
4865 * the VFS, but this is a very deep change!
4868 nfs4_transform_lock_offset(struct file_lock
*lock
)
4870 if (lock
->fl_start
< 0)
4871 lock
->fl_start
= OFFSET_MAX
;
4872 if (lock
->fl_end
< 0)
4873 lock
->fl_end
= OFFSET_MAX
;
4876 static void nfsd4_fl_get_owner(struct file_lock
*dst
, struct file_lock
*src
)
4878 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)src
->fl_owner
;
4879 dst
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lo
->lo_owner
));
4882 static void nfsd4_fl_put_owner(struct file_lock
*fl
)
4884 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)fl
->fl_owner
;
4887 nfs4_put_stateowner(&lo
->lo_owner
);
4888 fl
->fl_owner
= NULL
;
4892 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4893 .lm_get_owner
= nfsd4_fl_get_owner
,
4894 .lm_put_owner
= nfsd4_fl_put_owner
,
4898 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4900 struct nfs4_lockowner
*lo
;
4902 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4903 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4904 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4905 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4906 if (!deny
->ld_owner
.data
)
4907 /* We just don't care that much */
4909 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4910 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4913 deny
->ld_owner
.len
= 0;
4914 deny
->ld_owner
.data
= NULL
;
4915 deny
->ld_clientid
.cl_boot
= 0;
4916 deny
->ld_clientid
.cl_id
= 0;
4918 deny
->ld_start
= fl
->fl_start
;
4919 deny
->ld_length
= NFS4_MAX_UINT64
;
4920 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4921 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4922 deny
->ld_type
= NFS4_READ_LT
;
4923 if (fl
->fl_type
!= F_RDLCK
)
4924 deny
->ld_type
= NFS4_WRITE_LT
;
4927 static struct nfs4_lockowner
*
4928 find_lockowner_str_locked(clientid_t
*clid
, struct xdr_netobj
*owner
,
4929 struct nfs4_client
*clp
)
4931 unsigned int strhashval
= ownerstr_hashval(owner
);
4932 struct nfs4_stateowner
*so
;
4934 lockdep_assert_held(&clp
->cl_lock
);
4936 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
4938 if (so
->so_is_open_owner
)
4940 if (same_owner_str(so
, owner
))
4941 return lockowner(nfs4_get_stateowner(so
));
4946 static struct nfs4_lockowner
*
4947 find_lockowner_str(clientid_t
*clid
, struct xdr_netobj
*owner
,
4948 struct nfs4_client
*clp
)
4950 struct nfs4_lockowner
*lo
;
4952 spin_lock(&clp
->cl_lock
);
4953 lo
= find_lockowner_str_locked(clid
, owner
, clp
);
4954 spin_unlock(&clp
->cl_lock
);
4958 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
4960 unhash_lockowner_locked(lockowner(sop
));
4963 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
4965 struct nfs4_lockowner
*lo
= lockowner(sop
);
4967 kmem_cache_free(lockowner_slab
, lo
);
4970 static const struct nfs4_stateowner_operations lockowner_ops
= {
4971 .so_unhash
= nfs4_unhash_lockowner
,
4972 .so_free
= nfs4_free_lockowner
,
4976 * Alloc a lock owner structure.
4977 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4980 * strhashval = ownerstr_hashval
4982 static struct nfs4_lockowner
*
4983 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
4984 struct nfs4_ol_stateid
*open_stp
,
4985 struct nfsd4_lock
*lock
)
4987 struct nfs4_lockowner
*lo
, *ret
;
4989 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4992 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4993 lo
->lo_owner
.so_is_open_owner
= 0;
4994 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
4995 lo
->lo_owner
.so_ops
= &lockowner_ops
;
4996 spin_lock(&clp
->cl_lock
);
4997 ret
= find_lockowner_str_locked(&clp
->cl_clientid
,
4998 &lock
->lk_new_owner
, clp
);
5000 list_add(&lo
->lo_owner
.so_strhash
,
5001 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5004 nfs4_free_lockowner(&lo
->lo_owner
);
5005 spin_unlock(&clp
->cl_lock
);
5010 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5011 struct nfs4_file
*fp
, struct inode
*inode
,
5012 struct nfs4_ol_stateid
*open_stp
)
5014 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5016 lockdep_assert_held(&clp
->cl_lock
);
5018 atomic_inc(&stp
->st_stid
.sc_count
);
5019 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5020 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5022 stp
->st_stid
.sc_file
= fp
;
5023 stp
->st_stid
.sc_free
= nfs4_free_lock_stateid
;
5024 stp
->st_access_bmap
= 0;
5025 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5026 stp
->st_openstp
= open_stp
;
5027 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5028 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5029 spin_lock(&fp
->fi_lock
);
5030 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5031 spin_unlock(&fp
->fi_lock
);
5034 static struct nfs4_ol_stateid
*
5035 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5037 struct nfs4_ol_stateid
*lst
;
5038 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5040 lockdep_assert_held(&clp
->cl_lock
);
5042 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5043 if (lst
->st_stid
.sc_file
== fp
) {
5044 atomic_inc(&lst
->st_stid
.sc_count
);
5051 static struct nfs4_ol_stateid
*
5052 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5053 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5056 struct nfs4_stid
*ns
= NULL
;
5057 struct nfs4_ol_stateid
*lst
;
5058 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5059 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5061 spin_lock(&clp
->cl_lock
);
5062 lst
= find_lock_stateid(lo
, fi
);
5064 spin_unlock(&clp
->cl_lock
);
5065 ns
= nfs4_alloc_stid(clp
, stateid_slab
);
5069 spin_lock(&clp
->cl_lock
);
5070 lst
= find_lock_stateid(lo
, fi
);
5072 lst
= openlockstateid(ns
);
5073 init_lock_stateid(lst
, lo
, fi
, inode
, ost
);
5078 spin_unlock(&clp
->cl_lock
);
5085 check_lock_length(u64 offset
, u64 length
)
5087 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5088 LOFF_OVERFLOW(offset
, length
)));
5091 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5093 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5095 lockdep_assert_held(&fp
->fi_lock
);
5097 if (test_access(access
, lock_stp
))
5099 __nfs4_file_get_access(fp
, access
);
5100 set_access(access
, lock_stp
);
5104 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5105 struct nfs4_ol_stateid
*ost
,
5106 struct nfsd4_lock
*lock
,
5107 struct nfs4_ol_stateid
**lst
, bool *new)
5110 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5111 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5112 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5113 struct inode
*inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
5114 struct nfs4_lockowner
*lo
;
5115 unsigned int strhashval
;
5117 lo
= find_lockowner_str(&cl
->cl_clientid
, &lock
->v
.new.owner
, cl
);
5119 strhashval
= ownerstr_hashval(&lock
->v
.new.owner
);
5120 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5122 return nfserr_jukebox
;
5124 /* with an existing lockowner, seqids must be the same */
5125 status
= nfserr_bad_seqid
;
5126 if (!cstate
->minorversion
&&
5127 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5131 *lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5133 status
= nfserr_jukebox
;
5138 nfs4_put_stateowner(&lo
->lo_owner
);
5146 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5147 struct nfsd4_lock
*lock
)
5149 struct nfs4_openowner
*open_sop
= NULL
;
5150 struct nfs4_lockowner
*lock_sop
= NULL
;
5151 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5152 struct nfs4_ol_stateid
*open_stp
= NULL
;
5153 struct nfs4_file
*fp
;
5154 struct file
*filp
= NULL
;
5155 struct file_lock
*file_lock
= NULL
;
5156 struct file_lock
*conflock
= NULL
;
5161 struct net
*net
= SVC_NET(rqstp
);
5162 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5164 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5165 (long long) lock
->lk_offset
,
5166 (long long) lock
->lk_length
);
5168 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5169 return nfserr_inval
;
5171 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5172 S_IFREG
, NFSD_MAY_LOCK
))) {
5173 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5177 if (lock
->lk_is_new
) {
5178 if (nfsd4_has_session(cstate
))
5179 /* See rfc 5661 18.10.3: given clientid is ignored: */
5180 memcpy(&lock
->v
.new.clientid
,
5181 &cstate
->session
->se_client
->cl_clientid
,
5182 sizeof(clientid_t
));
5184 status
= nfserr_stale_clientid
;
5185 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5188 /* validate and update open stateid and open seqid */
5189 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5190 lock
->lk_new_open_seqid
,
5191 &lock
->lk_new_open_stateid
,
5195 open_sop
= openowner(open_stp
->st_stateowner
);
5196 status
= nfserr_bad_stateid
;
5197 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5198 &lock
->v
.new.clientid
))
5200 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5203 status
= nfs4_preprocess_seqid_op(cstate
,
5204 lock
->lk_old_lock_seqid
,
5205 &lock
->lk_old_lock_stateid
,
5206 NFS4_LOCK_STID
, &lock_stp
, nn
);
5210 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5212 lkflg
= setlkflg(lock
->lk_type
);
5213 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5217 status
= nfserr_grace
;
5218 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5220 status
= nfserr_no_grace
;
5221 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5224 file_lock
= locks_alloc_lock();
5226 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5227 status
= nfserr_jukebox
;
5231 fp
= lock_stp
->st_stid
.sc_file
;
5232 switch (lock
->lk_type
) {
5235 spin_lock(&fp
->fi_lock
);
5236 filp
= find_readable_file_locked(fp
);
5238 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5239 spin_unlock(&fp
->fi_lock
);
5240 file_lock
->fl_type
= F_RDLCK
;
5243 case NFS4_WRITEW_LT
:
5244 spin_lock(&fp
->fi_lock
);
5245 filp
= find_writeable_file_locked(fp
);
5247 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
5248 spin_unlock(&fp
->fi_lock
);
5249 file_lock
->fl_type
= F_WRLCK
;
5252 status
= nfserr_inval
;
5256 status
= nfserr_openmode
;
5260 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
5261 file_lock
->fl_pid
= current
->tgid
;
5262 file_lock
->fl_file
= filp
;
5263 file_lock
->fl_flags
= FL_POSIX
;
5264 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5265 file_lock
->fl_start
= lock
->lk_offset
;
5266 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
5267 nfs4_transform_lock_offset(file_lock
);
5269 conflock
= locks_alloc_lock();
5271 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5272 status
= nfserr_jukebox
;
5276 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
5278 case 0: /* success! */
5279 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
5280 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
5284 case (EAGAIN
): /* conflock holds conflicting lock */
5285 status
= nfserr_denied
;
5286 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5287 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
5290 status
= nfserr_deadlock
;
5293 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
5294 status
= nfserrno(err
);
5301 /* Bump seqid manually if the 4.0 replay owner is openowner */
5302 if (cstate
->replay_owner
&&
5303 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
5304 seqid_mutating_err(ntohl(status
)))
5305 lock_sop
->lo_owner
.so_seqid
++;
5308 * If this is a new, never-before-used stateid, and we are
5309 * returning an error, then just go ahead and release it.
5312 release_lock_stateid(lock_stp
);
5314 nfs4_put_stid(&lock_stp
->st_stid
);
5317 nfs4_put_stid(&open_stp
->st_stid
);
5318 nfsd4_bump_seqid(cstate
, status
);
5320 locks_free_lock(file_lock
);
5322 locks_free_lock(conflock
);
5327 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5328 * so we do a temporary open here just to get an open file to pass to
5329 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5332 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
5335 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
5337 err
= nfserrno(vfs_test_lock(file
, lock
));
5347 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5348 struct nfsd4_lockt
*lockt
)
5350 struct file_lock
*file_lock
= NULL
;
5351 struct nfs4_lockowner
*lo
= NULL
;
5353 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5355 if (locks_in_grace(SVC_NET(rqstp
)))
5356 return nfserr_grace
;
5358 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
5359 return nfserr_inval
;
5361 if (!nfsd4_has_session(cstate
)) {
5362 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
5367 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5370 file_lock
= locks_alloc_lock();
5372 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5373 status
= nfserr_jukebox
;
5377 switch (lockt
->lt_type
) {
5380 file_lock
->fl_type
= F_RDLCK
;
5383 case NFS4_WRITEW_LT
:
5384 file_lock
->fl_type
= F_WRLCK
;
5387 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
5388 status
= nfserr_inval
;
5392 lo
= find_lockowner_str(&lockt
->lt_clientid
, &lockt
->lt_owner
,
5395 file_lock
->fl_owner
= (fl_owner_t
)lo
;
5396 file_lock
->fl_pid
= current
->tgid
;
5397 file_lock
->fl_flags
= FL_POSIX
;
5399 file_lock
->fl_start
= lockt
->lt_offset
;
5400 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
5402 nfs4_transform_lock_offset(file_lock
);
5404 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
5408 if (file_lock
->fl_type
!= F_UNLCK
) {
5409 status
= nfserr_denied
;
5410 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
5414 nfs4_put_stateowner(&lo
->lo_owner
);
5416 locks_free_lock(file_lock
);
5421 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5422 struct nfsd4_locku
*locku
)
5424 struct nfs4_ol_stateid
*stp
;
5425 struct file
*filp
= NULL
;
5426 struct file_lock
*file_lock
= NULL
;
5429 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5431 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5432 (long long) locku
->lu_offset
,
5433 (long long) locku
->lu_length
);
5435 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
5436 return nfserr_inval
;
5438 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
5439 &locku
->lu_stateid
, NFS4_LOCK_STID
,
5443 filp
= find_any_file(stp
->st_stid
.sc_file
);
5445 status
= nfserr_lock_range
;
5448 file_lock
= locks_alloc_lock();
5450 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5451 status
= nfserr_jukebox
;
5455 file_lock
->fl_type
= F_UNLCK
;
5456 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
5457 file_lock
->fl_pid
= current
->tgid
;
5458 file_lock
->fl_file
= filp
;
5459 file_lock
->fl_flags
= FL_POSIX
;
5460 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5461 file_lock
->fl_start
= locku
->lu_offset
;
5463 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
5465 nfs4_transform_lock_offset(file_lock
);
5467 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
5469 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
5472 update_stateid(&stp
->st_stid
.sc_stateid
);
5473 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
5477 nfs4_put_stid(&stp
->st_stid
);
5479 nfsd4_bump_seqid(cstate
, status
);
5481 locks_free_lock(file_lock
);
5485 status
= nfserrno(err
);
5491 * true: locks held by lockowner
5492 * false: no locks held by lockowner
5495 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
5497 struct file_lock
**flpp
;
5499 struct file
*filp
= find_any_file(fp
);
5500 struct inode
*inode
;
5503 /* Any valid lock stateid should have some sort of access */
5508 inode
= file_inode(filp
);
5510 spin_lock(&inode
->i_lock
);
5511 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
5512 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
5517 spin_unlock(&inode
->i_lock
);
5523 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
5524 struct nfsd4_compound_state
*cstate
,
5525 struct nfsd4_release_lockowner
*rlockowner
)
5527 clientid_t
*clid
= &rlockowner
->rl_clientid
;
5528 struct nfs4_stateowner
*sop
;
5529 struct nfs4_lockowner
*lo
= NULL
;
5530 struct nfs4_ol_stateid
*stp
;
5531 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
5532 unsigned int hashval
= ownerstr_hashval(owner
);
5534 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5535 struct nfs4_client
*clp
;
5537 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5538 clid
->cl_boot
, clid
->cl_id
);
5540 status
= lookup_clientid(clid
, cstate
, nn
);
5545 /* Find the matching lock stateowner */
5546 spin_lock(&clp
->cl_lock
);
5547 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
5550 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
5553 /* see if there are still any locks associated with it */
5554 lo
= lockowner(sop
);
5555 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
5556 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
5557 status
= nfserr_locks_held
;
5558 spin_unlock(&clp
->cl_lock
);
5563 nfs4_get_stateowner(sop
);
5566 spin_unlock(&clp
->cl_lock
);
5568 release_lockowner(lo
);
5572 static inline struct nfs4_client_reclaim
*
5575 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
5579 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
5581 struct nfs4_client_reclaim
*crp
;
5583 crp
= nfsd4_find_reclaim_client(name
, nn
);
5584 return (crp
&& crp
->cr_clp
);
5588 * failure => all reset bets are off, nfserr_no_grace...
5590 struct nfs4_client_reclaim
*
5591 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
5593 unsigned int strhashval
;
5594 struct nfs4_client_reclaim
*crp
;
5596 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
5597 crp
= alloc_reclaim();
5599 strhashval
= clientstr_hashval(name
);
5600 INIT_LIST_HEAD(&crp
->cr_strhash
);
5601 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
5602 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
5604 nn
->reclaim_str_hashtbl_size
++;
5610 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
5612 list_del(&crp
->cr_strhash
);
5614 nn
->reclaim_str_hashtbl_size
--;
5618 nfs4_release_reclaim(struct nfsd_net
*nn
)
5620 struct nfs4_client_reclaim
*crp
= NULL
;
5623 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5624 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
5625 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
5626 struct nfs4_client_reclaim
, cr_strhash
);
5627 nfs4_remove_reclaim_record(crp
, nn
);
5630 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
5634 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
5635 struct nfs4_client_reclaim
*
5636 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
5638 unsigned int strhashval
;
5639 struct nfs4_client_reclaim
*crp
= NULL
;
5641 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
5643 strhashval
= clientstr_hashval(recdir
);
5644 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
5645 if (same_name(crp
->cr_recdir
, recdir
)) {
5653 * Called from OPEN. Look for clientid in reclaim list.
5656 nfs4_check_open_reclaim(clientid_t
*clid
,
5657 struct nfsd4_compound_state
*cstate
,
5658 struct nfsd_net
*nn
)
5662 /* find clientid in conf_id_hashtbl */
5663 status
= lookup_clientid(clid
, cstate
, nn
);
5665 return nfserr_reclaim_bad
;
5667 if (nfsd4_client_record_check(cstate
->clp
))
5668 return nfserr_reclaim_bad
;
5673 #ifdef CONFIG_NFSD_FAULT_INJECTION
5675 put_client(struct nfs4_client
*clp
)
5677 atomic_dec(&clp
->cl_refcount
);
5680 static struct nfs4_client
*
5681 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5683 struct nfs4_client
*clp
;
5684 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5687 if (!nfsd_netns_ready(nn
))
5690 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5691 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5698 nfsd_inject_print_clients(void)
5700 struct nfs4_client
*clp
;
5702 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5704 char buf
[INET6_ADDRSTRLEN
];
5706 if (!nfsd_netns_ready(nn
))
5709 spin_lock(&nn
->client_lock
);
5710 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5711 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5712 pr_info("NFS Client: %s\n", buf
);
5715 spin_unlock(&nn
->client_lock
);
5721 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5724 struct nfs4_client
*clp
;
5725 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5728 if (!nfsd_netns_ready(nn
))
5731 spin_lock(&nn
->client_lock
);
5732 clp
= nfsd_find_client(addr
, addr_size
);
5734 if (mark_client_expired_locked(clp
) == nfs_ok
)
5739 spin_unlock(&nn
->client_lock
);
5748 nfsd_inject_forget_clients(u64 max
)
5751 struct nfs4_client
*clp
, *next
;
5752 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5754 LIST_HEAD(reaplist
);
5756 if (!nfsd_netns_ready(nn
))
5759 spin_lock(&nn
->client_lock
);
5760 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
5761 if (mark_client_expired_locked(clp
) == nfs_ok
) {
5762 list_add(&clp
->cl_lru
, &reaplist
);
5763 if (max
!= 0 && ++count
>= max
)
5767 spin_unlock(&nn
->client_lock
);
5769 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
5775 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
5778 char buf
[INET6_ADDRSTRLEN
];
5779 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5780 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
5784 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
5785 struct list_head
*collect
)
5787 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
5788 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5794 lockdep_assert_held(&nn
->client_lock
);
5795 atomic_inc(&clp
->cl_refcount
);
5796 list_add(&lst
->st_locks
, collect
);
5799 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
5800 struct list_head
*collect
,
5801 void (*func
)(struct nfs4_ol_stateid
*))
5803 struct nfs4_openowner
*oop
;
5804 struct nfs4_ol_stateid
*stp
, *st_next
;
5805 struct nfs4_ol_stateid
*lst
, *lst_next
;
5808 spin_lock(&clp
->cl_lock
);
5809 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
5810 list_for_each_entry_safe(stp
, st_next
,
5811 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
5812 list_for_each_entry_safe(lst
, lst_next
,
5813 &stp
->st_locks
, st_locks
) {
5816 nfsd_inject_add_lock_to_list(lst
,
5821 * Despite the fact that these functions deal
5822 * with 64-bit integers for "count", we must
5823 * ensure that it doesn't blow up the
5824 * clp->cl_refcount. Throw a warning if we
5825 * start to approach INT_MAX here.
5827 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
5834 spin_unlock(&clp
->cl_lock
);
5840 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
5843 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
5847 nfsd_print_client_locks(struct nfs4_client
*clp
)
5849 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
5850 nfsd_print_count(clp
, count
, "locked files");
5855 nfsd_inject_print_locks(void)
5857 struct nfs4_client
*clp
;
5859 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5862 if (!nfsd_netns_ready(nn
))
5865 spin_lock(&nn
->client_lock
);
5866 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
5867 count
+= nfsd_print_client_locks(clp
);
5868 spin_unlock(&nn
->client_lock
);
5874 nfsd_reap_locks(struct list_head
*reaplist
)
5876 struct nfs4_client
*clp
;
5877 struct nfs4_ol_stateid
*stp
, *next
;
5879 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
5880 list_del_init(&stp
->st_locks
);
5881 clp
= stp
->st_stid
.sc_client
;
5882 nfs4_put_stid(&stp
->st_stid
);
5888 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
5890 unsigned int count
= 0;
5891 struct nfs4_client
*clp
;
5892 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5894 LIST_HEAD(reaplist
);
5896 if (!nfsd_netns_ready(nn
))
5899 spin_lock(&nn
->client_lock
);
5900 clp
= nfsd_find_client(addr
, addr_size
);
5902 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
5903 spin_unlock(&nn
->client_lock
);
5904 nfsd_reap_locks(&reaplist
);
5909 nfsd_inject_forget_locks(u64 max
)
5912 struct nfs4_client
*clp
;
5913 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5915 LIST_HEAD(reaplist
);
5917 if (!nfsd_netns_ready(nn
))
5920 spin_lock(&nn
->client_lock
);
5921 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5922 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
5923 if (max
!= 0 && count
>= max
)
5926 spin_unlock(&nn
->client_lock
);
5927 nfsd_reap_locks(&reaplist
);
5932 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
5933 struct list_head
*collect
,
5934 void (*func
)(struct nfs4_openowner
*))
5936 struct nfs4_openowner
*oop
, *next
;
5937 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5941 lockdep_assert_held(&nn
->client_lock
);
5943 spin_lock(&clp
->cl_lock
);
5944 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
5948 atomic_inc(&clp
->cl_refcount
);
5949 list_add(&oop
->oo_perclient
, collect
);
5954 * Despite the fact that these functions deal with
5955 * 64-bit integers for "count", we must ensure that
5956 * it doesn't blow up the clp->cl_refcount. Throw a
5957 * warning if we start to approach INT_MAX here.
5959 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
5963 spin_unlock(&clp
->cl_lock
);
5969 nfsd_print_client_openowners(struct nfs4_client
*clp
)
5971 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
5973 nfsd_print_count(clp
, count
, "openowners");
5978 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
5979 struct list_head
*collect
, u64 max
)
5981 return nfsd_foreach_client_openowner(clp
, max
, collect
,
5982 unhash_openowner_locked
);
5986 nfsd_inject_print_openowners(void)
5988 struct nfs4_client
*clp
;
5990 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5993 if (!nfsd_netns_ready(nn
))
5996 spin_lock(&nn
->client_lock
);
5997 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
5998 count
+= nfsd_print_client_openowners(clp
);
5999 spin_unlock(&nn
->client_lock
);
6005 nfsd_reap_openowners(struct list_head
*reaplist
)
6007 struct nfs4_client
*clp
;
6008 struct nfs4_openowner
*oop
, *next
;
6010 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6011 list_del_init(&oop
->oo_perclient
);
6012 clp
= oop
->oo_owner
.so_client
;
6013 release_openowner(oop
);
6019 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6022 unsigned int count
= 0;
6023 struct nfs4_client
*clp
;
6024 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6026 LIST_HEAD(reaplist
);
6028 if (!nfsd_netns_ready(nn
))
6031 spin_lock(&nn
->client_lock
);
6032 clp
= nfsd_find_client(addr
, addr_size
);
6034 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6035 spin_unlock(&nn
->client_lock
);
6036 nfsd_reap_openowners(&reaplist
);
6041 nfsd_inject_forget_openowners(u64 max
)
6044 struct nfs4_client
*clp
;
6045 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6047 LIST_HEAD(reaplist
);
6049 if (!nfsd_netns_ready(nn
))
6052 spin_lock(&nn
->client_lock
);
6053 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6054 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6056 if (max
!= 0 && count
>= max
)
6059 spin_unlock(&nn
->client_lock
);
6060 nfsd_reap_openowners(&reaplist
);
6064 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6065 struct list_head
*victims
)
6067 struct nfs4_delegation
*dp
, *next
;
6068 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6072 lockdep_assert_held(&nn
->client_lock
);
6074 spin_lock(&state_lock
);
6075 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6078 * It's not safe to mess with delegations that have a
6079 * non-zero dl_time. They might have already been broken
6080 * and could be processed by the laundromat outside of
6081 * the state_lock. Just leave them be.
6083 if (dp
->dl_time
!= 0)
6086 atomic_inc(&clp
->cl_refcount
);
6087 unhash_delegation_locked(dp
);
6088 list_add(&dp
->dl_recall_lru
, victims
);
6092 * Despite the fact that these functions deal with
6093 * 64-bit integers for "count", we must ensure that
6094 * it doesn't blow up the clp->cl_refcount. Throw a
6095 * warning if we start to approach INT_MAX here.
6097 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6101 spin_unlock(&state_lock
);
6106 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6108 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6110 nfsd_print_count(clp
, count
, "delegations");
6115 nfsd_inject_print_delegations(void)
6117 struct nfs4_client
*clp
;
6119 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6122 if (!nfsd_netns_ready(nn
))
6125 spin_lock(&nn
->client_lock
);
6126 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6127 count
+= nfsd_print_client_delegations(clp
);
6128 spin_unlock(&nn
->client_lock
);
6134 nfsd_forget_delegations(struct list_head
*reaplist
)
6136 struct nfs4_client
*clp
;
6137 struct nfs4_delegation
*dp
, *next
;
6139 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6140 list_del_init(&dp
->dl_recall_lru
);
6141 clp
= dp
->dl_stid
.sc_client
;
6142 revoke_delegation(dp
);
6148 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6152 struct nfs4_client
*clp
;
6153 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6155 LIST_HEAD(reaplist
);
6157 if (!nfsd_netns_ready(nn
))
6160 spin_lock(&nn
->client_lock
);
6161 clp
= nfsd_find_client(addr
, addr_size
);
6163 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6164 spin_unlock(&nn
->client_lock
);
6166 nfsd_forget_delegations(&reaplist
);
6171 nfsd_inject_forget_delegations(u64 max
)
6174 struct nfs4_client
*clp
;
6175 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6177 LIST_HEAD(reaplist
);
6179 if (!nfsd_netns_ready(nn
))
6182 spin_lock(&nn
->client_lock
);
6183 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6184 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6185 if (max
!= 0 && count
>= max
)
6188 spin_unlock(&nn
->client_lock
);
6189 nfsd_forget_delegations(&reaplist
);
6194 nfsd_recall_delegations(struct list_head
*reaplist
)
6196 struct nfs4_client
*clp
;
6197 struct nfs4_delegation
*dp
, *next
;
6199 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6200 list_del_init(&dp
->dl_recall_lru
);
6201 clp
= dp
->dl_stid
.sc_client
;
6203 * We skipped all entries that had a zero dl_time before,
6204 * so we can now reset the dl_time back to 0. If a delegation
6205 * break comes in now, then it won't make any difference since
6206 * we're recalling it either way.
6208 spin_lock(&state_lock
);
6210 spin_unlock(&state_lock
);
6211 nfsd_break_one_deleg(dp
);
6217 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
6221 struct nfs4_client
*clp
;
6222 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6224 LIST_HEAD(reaplist
);
6226 if (!nfsd_netns_ready(nn
))
6229 spin_lock(&nn
->client_lock
);
6230 clp
= nfsd_find_client(addr
, addr_size
);
6232 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6233 spin_unlock(&nn
->client_lock
);
6235 nfsd_recall_delegations(&reaplist
);
6240 nfsd_inject_recall_delegations(u64 max
)
6243 struct nfs4_client
*clp
, *next
;
6244 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6246 LIST_HEAD(reaplist
);
6248 if (!nfsd_netns_ready(nn
))
6251 spin_lock(&nn
->client_lock
);
6252 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6253 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6254 if (max
!= 0 && ++count
>= max
)
6257 spin_unlock(&nn
->client_lock
);
6258 nfsd_recall_delegations(&reaplist
);
6261 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6264 * Since the lifetime of a delegation isn't limited to that of an open, a
6265 * client may quite reasonably hang on to a delegation as long as it has
6266 * the inode cached. This becomes an obvious problem the first time a
6267 * client's inode cache approaches the size of the server's total memory.
6269 * For now we avoid this problem by imposing a hard limit on the number
6270 * of delegations, which varies according to the server's memory size.
6273 set_max_delegations(void)
6276 * Allow at most 4 delegations per megabyte of RAM. Quick
6277 * estimates suggest that in the worst case (where every delegation
6278 * is for a different inode), a delegation could take about 1.5K,
6279 * giving a worst case usage of about 6% of memory.
6281 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
6284 static int nfs4_state_create_net(struct net
*net
)
6286 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6289 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6290 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6291 if (!nn
->conf_id_hashtbl
)
6293 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6294 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6295 if (!nn
->unconf_id_hashtbl
)
6297 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
6298 SESSION_HASH_SIZE
, GFP_KERNEL
);
6299 if (!nn
->sessionid_hashtbl
)
6302 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6303 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
6304 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
6306 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
6307 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
6308 nn
->conf_name_tree
= RB_ROOT
;
6309 nn
->unconf_name_tree
= RB_ROOT
;
6310 INIT_LIST_HEAD(&nn
->client_lru
);
6311 INIT_LIST_HEAD(&nn
->close_lru
);
6312 INIT_LIST_HEAD(&nn
->del_recall_lru
);
6313 spin_lock_init(&nn
->client_lock
);
6315 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
6321 kfree(nn
->unconf_id_hashtbl
);
6323 kfree(nn
->conf_id_hashtbl
);
6329 nfs4_state_destroy_net(struct net
*net
)
6332 struct nfs4_client
*clp
= NULL
;
6333 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6335 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6336 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
6337 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6338 destroy_client(clp
);
6342 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6343 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
6344 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6345 destroy_client(clp
);
6349 kfree(nn
->sessionid_hashtbl
);
6350 kfree(nn
->unconf_id_hashtbl
);
6351 kfree(nn
->conf_id_hashtbl
);
6356 nfs4_state_start_net(struct net
*net
)
6358 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6361 ret
= nfs4_state_create_net(net
);
6364 nfsd4_client_tracking_init(net
);
6365 nn
->boot_time
= get_seconds();
6366 locks_start_grace(net
, &nn
->nfsd4_manager
);
6367 nn
->grace_ended
= false;
6368 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
6369 nn
->nfsd4_grace
, net
);
6370 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
6374 /* initialization to perform when the nfsd service is started: */
6377 nfs4_state_start(void)
6381 ret
= set_callback_cred();
6384 laundry_wq
= create_singlethread_workqueue("nfsd4");
6385 if (laundry_wq
== NULL
) {
6389 ret
= nfsd4_create_callback_queue();
6391 goto out_free_laundry
;
6393 set_max_delegations();
6398 destroy_workqueue(laundry_wq
);
6404 nfs4_state_shutdown_net(struct net
*net
)
6406 struct nfs4_delegation
*dp
= NULL
;
6407 struct list_head
*pos
, *next
, reaplist
;
6408 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6410 cancel_delayed_work_sync(&nn
->laundromat_work
);
6411 locks_end_grace(&nn
->nfsd4_manager
);
6413 INIT_LIST_HEAD(&reaplist
);
6414 spin_lock(&state_lock
);
6415 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
6416 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6417 unhash_delegation_locked(dp
);
6418 list_add(&dp
->dl_recall_lru
, &reaplist
);
6420 spin_unlock(&state_lock
);
6421 list_for_each_safe(pos
, next
, &reaplist
) {
6422 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6423 list_del_init(&dp
->dl_recall_lru
);
6424 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
6425 nfs4_put_stid(&dp
->dl_stid
);
6428 nfsd4_client_tracking_exit(net
);
6429 nfs4_state_destroy_net(net
);
6433 nfs4_state_shutdown(void)
6435 destroy_workqueue(laundry_wq
);
6436 nfsd4_destroy_callback_queue();
6440 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6442 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
6443 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
6447 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6449 if (cstate
->minorversion
) {
6450 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
6451 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6456 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
6458 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6462 * functions to set current state id
6465 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6467 put_stateid(cstate
, &odp
->od_stateid
);
6471 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
6473 put_stateid(cstate
, &open
->op_stateid
);
6477 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6479 put_stateid(cstate
, &close
->cl_stateid
);
6483 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
6485 put_stateid(cstate
, &lock
->lk_resp_stateid
);
6489 * functions to consume current state id
6493 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6495 get_stateid(cstate
, &odp
->od_stateid
);
6499 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
6501 get_stateid(cstate
, &drp
->dr_stateid
);
6505 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
6507 get_stateid(cstate
, &fsp
->fr_stateid
);
6511 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
6513 get_stateid(cstate
, &setattr
->sa_stateid
);
6517 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6519 get_stateid(cstate
, &close
->cl_stateid
);
6523 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
6525 get_stateid(cstate
, &locku
->lu_stateid
);
6529 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
6531 get_stateid(cstate
, &read
->rd_stateid
);
6535 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
6537 get_stateid(cstate
, &write
->wr_stateid
);