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 struct nfsd4_callback_ops nfsd4_cb_recall_ops
;
101 static bool is_session_dead(struct nfsd4_session
*ses
)
103 return ses
->se_flags
& NFS4_SESSION_DEAD
;
106 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
108 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
109 return nfserr_jukebox
;
110 ses
->se_flags
|= NFS4_SESSION_DEAD
;
114 static bool is_client_expired(struct nfs4_client
*clp
)
116 return clp
->cl_time
== 0;
119 static __be32
get_client_locked(struct nfs4_client
*clp
)
121 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
123 lockdep_assert_held(&nn
->client_lock
);
125 if (is_client_expired(clp
))
126 return nfserr_expired
;
127 atomic_inc(&clp
->cl_refcount
);
131 /* must be called under the client_lock */
133 renew_client_locked(struct nfs4_client
*clp
)
135 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
137 if (is_client_expired(clp
)) {
139 printk("%s: client (clientid %08x/%08x) already expired\n",
141 clp
->cl_clientid
.cl_boot
,
142 clp
->cl_clientid
.cl_id
);
146 dprintk("renewing client (clientid %08x/%08x)\n",
147 clp
->cl_clientid
.cl_boot
,
148 clp
->cl_clientid
.cl_id
);
149 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
150 clp
->cl_time
= get_seconds();
154 renew_client(struct nfs4_client
*clp
)
156 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
158 spin_lock(&nn
->client_lock
);
159 renew_client_locked(clp
);
160 spin_unlock(&nn
->client_lock
);
163 static void put_client_renew_locked(struct nfs4_client
*clp
)
165 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
167 lockdep_assert_held(&nn
->client_lock
);
169 if (!atomic_dec_and_test(&clp
->cl_refcount
))
171 if (!is_client_expired(clp
))
172 renew_client_locked(clp
);
175 static void put_client_renew(struct nfs4_client
*clp
)
177 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
179 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
181 if (!is_client_expired(clp
))
182 renew_client_locked(clp
);
183 spin_unlock(&nn
->client_lock
);
186 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
190 if (is_session_dead(ses
))
191 return nfserr_badsession
;
192 status
= get_client_locked(ses
->se_client
);
195 atomic_inc(&ses
->se_ref
);
199 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
201 struct nfs4_client
*clp
= ses
->se_client
;
202 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
204 lockdep_assert_held(&nn
->client_lock
);
206 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
208 put_client_renew_locked(clp
);
211 static void nfsd4_put_session(struct nfsd4_session
*ses
)
213 struct nfs4_client
*clp
= ses
->se_client
;
214 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
216 spin_lock(&nn
->client_lock
);
217 nfsd4_put_session_locked(ses
);
218 spin_unlock(&nn
->client_lock
);
221 static inline struct nfs4_stateowner
*
222 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
224 atomic_inc(&sop
->so_count
);
229 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
231 return (sop
->so_owner
.len
== owner
->len
) &&
232 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
235 static struct nfs4_openowner
*
236 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
237 struct nfs4_client
*clp
)
239 struct nfs4_stateowner
*so
;
241 lockdep_assert_held(&clp
->cl_lock
);
243 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
245 if (!so
->so_is_open_owner
)
247 if (same_owner_str(so
, &open
->op_owner
))
248 return openowner(nfs4_get_stateowner(so
));
253 static struct nfs4_openowner
*
254 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
255 struct nfs4_client
*clp
)
257 struct nfs4_openowner
*oo
;
259 spin_lock(&clp
->cl_lock
);
260 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
261 spin_unlock(&clp
->cl_lock
);
266 opaque_hashval(const void *ptr
, int nbytes
)
268 unsigned char *cptr
= (unsigned char *) ptr
;
278 static void nfsd4_free_file(struct nfs4_file
*f
)
280 kmem_cache_free(file_slab
, f
);
284 put_nfs4_file(struct nfs4_file
*fi
)
286 might_lock(&state_lock
);
288 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
289 hlist_del(&fi
->fi_hash
);
290 spin_unlock(&state_lock
);
296 get_nfs4_file(struct nfs4_file
*fi
)
298 atomic_inc(&fi
->fi_ref
);
302 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
304 if (f
->fi_fds
[oflag
])
305 return get_file(f
->fi_fds
[oflag
]);
310 find_writeable_file_locked(struct nfs4_file
*f
)
314 lockdep_assert_held(&f
->fi_lock
);
316 ret
= __nfs4_get_fd(f
, O_WRONLY
);
318 ret
= __nfs4_get_fd(f
, O_RDWR
);
323 find_writeable_file(struct nfs4_file
*f
)
327 spin_lock(&f
->fi_lock
);
328 ret
= find_writeable_file_locked(f
);
329 spin_unlock(&f
->fi_lock
);
334 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
338 lockdep_assert_held(&f
->fi_lock
);
340 ret
= __nfs4_get_fd(f
, O_RDONLY
);
342 ret
= __nfs4_get_fd(f
, O_RDWR
);
347 find_readable_file(struct nfs4_file
*f
)
351 spin_lock(&f
->fi_lock
);
352 ret
= find_readable_file_locked(f
);
353 spin_unlock(&f
->fi_lock
);
359 find_any_file(struct nfs4_file
*f
)
363 spin_lock(&f
->fi_lock
);
364 ret
= __nfs4_get_fd(f
, O_RDWR
);
366 ret
= __nfs4_get_fd(f
, O_WRONLY
);
368 ret
= __nfs4_get_fd(f
, O_RDONLY
);
370 spin_unlock(&f
->fi_lock
);
374 static atomic_long_t num_delegations
;
375 unsigned long max_delegations
;
378 * Open owner state (share locks)
381 /* hash tables for lock and open owners */
382 #define OWNER_HASH_BITS 8
383 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
384 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
386 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
390 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
391 return ret
& OWNER_HASH_MASK
;
394 /* hash table for nfs4_file */
395 #define FILE_HASH_BITS 8
396 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
398 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
400 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
403 static unsigned int file_hashval(struct knfsd_fh
*fh
)
405 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
408 static bool nfsd_fh_match(struct knfsd_fh
*fh1
, struct knfsd_fh
*fh2
)
410 return fh1
->fh_size
== fh2
->fh_size
&&
411 !memcmp(fh1
->fh_base
.fh_pad
,
416 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
419 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
421 lockdep_assert_held(&fp
->fi_lock
);
423 if (access
& NFS4_SHARE_ACCESS_WRITE
)
424 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
425 if (access
& NFS4_SHARE_ACCESS_READ
)
426 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
430 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
432 lockdep_assert_held(&fp
->fi_lock
);
434 /* Does this access mode make sense? */
435 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
438 /* Does it conflict with a deny mode already set? */
439 if ((access
& fp
->fi_share_deny
) != 0)
440 return nfserr_share_denied
;
442 __nfs4_file_get_access(fp
, access
);
446 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
448 /* Common case is that there is no deny mode. */
450 /* Does this deny mode make sense? */
451 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
454 if ((deny
& NFS4_SHARE_DENY_READ
) &&
455 atomic_read(&fp
->fi_access
[O_RDONLY
]))
456 return nfserr_share_denied
;
458 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
459 atomic_read(&fp
->fi_access
[O_WRONLY
]))
460 return nfserr_share_denied
;
465 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
467 might_lock(&fp
->fi_lock
);
469 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
470 struct file
*f1
= NULL
;
471 struct file
*f2
= NULL
;
473 swap(f1
, fp
->fi_fds
[oflag
]);
474 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
475 swap(f2
, fp
->fi_fds
[O_RDWR
]);
476 spin_unlock(&fp
->fi_lock
);
484 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
486 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
488 if (access
& NFS4_SHARE_ACCESS_WRITE
)
489 __nfs4_file_put_access(fp
, O_WRONLY
);
490 if (access
& NFS4_SHARE_ACCESS_READ
)
491 __nfs4_file_put_access(fp
, O_RDONLY
);
494 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
,
495 struct kmem_cache
*slab
)
497 struct nfs4_stid
*stid
;
500 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
504 idr_preload(GFP_KERNEL
);
505 spin_lock(&cl
->cl_lock
);
506 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
507 spin_unlock(&cl
->cl_lock
);
511 stid
->sc_client
= cl
;
512 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
513 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
514 /* Will be incremented before return to client: */
515 atomic_set(&stid
->sc_count
, 1);
518 * It shouldn't be a problem to reuse an opaque stateid value.
519 * I don't think it is for 4.1. But with 4.0 I worry that, for
520 * example, a stray write retransmission could be accepted by
521 * the server when it should have been rejected. Therefore,
522 * adopt a trick from the sctp code to attempt to maximize the
523 * amount of time until an id is reused, by ensuring they always
524 * "increase" (mod INT_MAX):
528 kmem_cache_free(slab
, stid
);
532 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
534 struct nfs4_stid
*stid
;
535 struct nfs4_ol_stateid
*stp
;
537 stid
= nfs4_alloc_stid(clp
, stateid_slab
);
541 stp
= openlockstateid(stid
);
542 stp
->st_stid
.sc_free
= nfs4_free_ol_stateid
;
546 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
548 kmem_cache_free(deleg_slab
, stid
);
549 atomic_long_dec(&num_delegations
);
553 * When we recall a delegation, we should be careful not to hand it
554 * out again straight away.
555 * To ensure this we keep a pair of bloom filters ('new' and 'old')
556 * in which the filehandles of recalled delegations are "stored".
557 * If a filehandle appear in either filter, a delegation is blocked.
558 * When a delegation is recalled, the filehandle is stored in the "new"
560 * Every 30 seconds we swap the filters and clear the "new" one,
561 * unless both are empty of course.
563 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
564 * low 3 bytes as hash-table indices.
566 * 'blocked_delegations_lock', which is always taken in block_delegations(),
567 * is used to manage concurrent access. Testing does not need the lock
568 * except when swapping the two filters.
570 static DEFINE_SPINLOCK(blocked_delegations_lock
);
571 static struct bloom_pair
{
572 int entries
, old_entries
;
574 int new; /* index into 'set' */
575 DECLARE_BITMAP(set
[2], 256);
576 } blocked_delegations
;
578 static int delegation_blocked(struct knfsd_fh
*fh
)
581 struct bloom_pair
*bd
= &blocked_delegations
;
583 if (bd
->entries
== 0)
585 if (seconds_since_boot() - bd
->swap_time
> 30) {
586 spin_lock(&blocked_delegations_lock
);
587 if (seconds_since_boot() - bd
->swap_time
> 30) {
588 bd
->entries
-= bd
->old_entries
;
589 bd
->old_entries
= bd
->entries
;
590 memset(bd
->set
[bd
->new], 0,
593 bd
->swap_time
= seconds_since_boot();
595 spin_unlock(&blocked_delegations_lock
);
597 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
598 if (test_bit(hash
&255, bd
->set
[0]) &&
599 test_bit((hash
>>8)&255, bd
->set
[0]) &&
600 test_bit((hash
>>16)&255, bd
->set
[0]))
603 if (test_bit(hash
&255, bd
->set
[1]) &&
604 test_bit((hash
>>8)&255, bd
->set
[1]) &&
605 test_bit((hash
>>16)&255, bd
->set
[1]))
611 static void block_delegations(struct knfsd_fh
*fh
)
614 struct bloom_pair
*bd
= &blocked_delegations
;
616 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
618 spin_lock(&blocked_delegations_lock
);
619 __set_bit(hash
&255, bd
->set
[bd
->new]);
620 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
621 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
622 if (bd
->entries
== 0)
623 bd
->swap_time
= seconds_since_boot();
625 spin_unlock(&blocked_delegations_lock
);
628 static struct nfs4_delegation
*
629 alloc_init_deleg(struct nfs4_client
*clp
, struct svc_fh
*current_fh
)
631 struct nfs4_delegation
*dp
;
634 dprintk("NFSD alloc_init_deleg\n");
635 n
= atomic_long_inc_return(&num_delegations
);
636 if (n
< 0 || n
> max_delegations
)
638 if (delegation_blocked(¤t_fh
->fh_handle
))
640 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
644 dp
->dl_stid
.sc_free
= nfs4_free_deleg
;
646 * delegation seqid's are never incremented. The 4.1 special
647 * meaning of seqid 0 isn't meaningful, really, but let's avoid
648 * 0 anyway just for consistency and use 1:
650 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
651 INIT_LIST_HEAD(&dp
->dl_perfile
);
652 INIT_LIST_HEAD(&dp
->dl_perclnt
);
653 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
654 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
656 nfsd4_init_cb(&dp
->dl_recall
, dp
->dl_stid
.sc_client
,
657 &nfsd4_cb_recall_ops
, NFSPROC4_CLNT_CB_RECALL
);
660 atomic_long_dec(&num_delegations
);
665 nfs4_put_stid(struct nfs4_stid
*s
)
667 struct nfs4_file
*fp
= s
->sc_file
;
668 struct nfs4_client
*clp
= s
->sc_client
;
670 might_lock(&clp
->cl_lock
);
672 if (!atomic_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
673 wake_up_all(&close_wq
);
676 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
677 spin_unlock(&clp
->cl_lock
);
683 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
685 struct file
*filp
= NULL
;
687 spin_lock(&fp
->fi_lock
);
688 if (fp
->fi_deleg_file
&& atomic_dec_and_test(&fp
->fi_delegees
))
689 swap(filp
, fp
->fi_deleg_file
);
690 spin_unlock(&fp
->fi_lock
);
693 vfs_setlease(filp
, F_UNLCK
, NULL
, NULL
);
698 static void unhash_stid(struct nfs4_stid
*s
)
704 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
706 lockdep_assert_held(&state_lock
);
707 lockdep_assert_held(&fp
->fi_lock
);
709 atomic_inc(&dp
->dl_stid
.sc_count
);
710 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
711 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
712 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
716 unhash_delegation_locked(struct nfs4_delegation
*dp
)
718 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
720 lockdep_assert_held(&state_lock
);
722 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
723 /* Ensure that deleg break won't try to requeue it */
725 spin_lock(&fp
->fi_lock
);
726 list_del_init(&dp
->dl_perclnt
);
727 list_del_init(&dp
->dl_recall_lru
);
728 list_del_init(&dp
->dl_perfile
);
729 spin_unlock(&fp
->fi_lock
);
732 static void destroy_delegation(struct nfs4_delegation
*dp
)
734 spin_lock(&state_lock
);
735 unhash_delegation_locked(dp
);
736 spin_unlock(&state_lock
);
737 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
738 nfs4_put_stid(&dp
->dl_stid
);
741 static void revoke_delegation(struct nfs4_delegation
*dp
)
743 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
745 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
747 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
749 if (clp
->cl_minorversion
== 0)
750 nfs4_put_stid(&dp
->dl_stid
);
752 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
753 spin_lock(&clp
->cl_lock
);
754 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
755 spin_unlock(&clp
->cl_lock
);
763 static unsigned int clientid_hashval(u32 id
)
765 return id
& CLIENT_HASH_MASK
;
768 static unsigned int clientstr_hashval(const char *name
)
770 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
774 * We store the NONE, READ, WRITE, and BOTH bits separately in the
775 * st_{access,deny}_bmap field of the stateid, in order to track not
776 * only what share bits are currently in force, but also what
777 * combinations of share bits previous opens have used. This allows us
778 * to enforce the recommendation of rfc 3530 14.2.19 that the server
779 * return an error if the client attempt to downgrade to a combination
780 * of share bits not explicable by closing some of its previous opens.
782 * XXX: This enforcement is actually incomplete, since we don't keep
783 * track of access/deny bit combinations; so, e.g., we allow:
785 * OPEN allow read, deny write
786 * OPEN allow both, deny none
787 * DOWNGRADE allow read, deny none
789 * which we should reject.
792 bmap_to_share_mode(unsigned long bmap
) {
794 unsigned int access
= 0;
796 for (i
= 1; i
< 4; i
++) {
797 if (test_bit(i
, &bmap
))
803 /* set share access for a given stateid */
805 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
807 unsigned char mask
= 1 << access
;
809 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
810 stp
->st_access_bmap
|= mask
;
813 /* clear share access for a given stateid */
815 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
817 unsigned char mask
= 1 << access
;
819 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
820 stp
->st_access_bmap
&= ~mask
;
823 /* test whether a given stateid has access */
825 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
827 unsigned char mask
= 1 << access
;
829 return (bool)(stp
->st_access_bmap
& mask
);
832 /* set share deny for a given stateid */
834 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
836 unsigned char mask
= 1 << deny
;
838 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
839 stp
->st_deny_bmap
|= mask
;
842 /* clear share deny for a given stateid */
844 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
846 unsigned char mask
= 1 << deny
;
848 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
849 stp
->st_deny_bmap
&= ~mask
;
852 /* test whether a given stateid is denying specific access */
854 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
856 unsigned char mask
= 1 << deny
;
858 return (bool)(stp
->st_deny_bmap
& mask
);
861 static int nfs4_access_to_omode(u32 access
)
863 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
864 case NFS4_SHARE_ACCESS_READ
:
866 case NFS4_SHARE_ACCESS_WRITE
:
868 case NFS4_SHARE_ACCESS_BOTH
:
876 * A stateid that had a deny mode associated with it is being released
877 * or downgraded. Recalculate the deny mode on the file.
880 recalculate_deny_mode(struct nfs4_file
*fp
)
882 struct nfs4_ol_stateid
*stp
;
884 spin_lock(&fp
->fi_lock
);
885 fp
->fi_share_deny
= 0;
886 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
887 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
888 spin_unlock(&fp
->fi_lock
);
892 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
897 for (i
= 1; i
< 4; i
++) {
898 if ((i
& deny
) != i
) {
904 /* Recalculate per-file deny mode if there was a change */
906 recalculate_deny_mode(stp
->st_stid
.sc_file
);
909 /* release all access and file references for a given stateid */
911 release_all_access(struct nfs4_ol_stateid
*stp
)
914 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
916 if (fp
&& stp
->st_deny_bmap
!= 0)
917 recalculate_deny_mode(fp
);
919 for (i
= 1; i
< 4; i
++) {
920 if (test_access(i
, stp
))
921 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
922 clear_access(i
, stp
);
926 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
928 struct nfs4_client
*clp
= sop
->so_client
;
930 might_lock(&clp
->cl_lock
);
932 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
934 sop
->so_ops
->so_unhash(sop
);
935 spin_unlock(&clp
->cl_lock
);
936 kfree(sop
->so_owner
.data
);
937 sop
->so_ops
->so_free(sop
);
940 static void unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
942 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
944 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
946 spin_lock(&fp
->fi_lock
);
947 list_del(&stp
->st_perfile
);
948 spin_unlock(&fp
->fi_lock
);
949 list_del(&stp
->st_perstateowner
);
952 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
954 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
956 release_all_access(stp
);
957 if (stp
->st_stateowner
)
958 nfs4_put_stateowner(stp
->st_stateowner
);
959 kmem_cache_free(stateid_slab
, stid
);
962 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
964 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
965 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
968 file
= find_any_file(stp
->st_stid
.sc_file
);
970 filp_close(file
, (fl_owner_t
)lo
);
971 nfs4_free_ol_stateid(stid
);
975 * Put the persistent reference to an already unhashed generic stateid, while
976 * holding the cl_lock. If it's the last reference, then put it onto the
977 * reaplist for later destruction.
979 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
980 struct list_head
*reaplist
)
982 struct nfs4_stid
*s
= &stp
->st_stid
;
983 struct nfs4_client
*clp
= s
->sc_client
;
985 lockdep_assert_held(&clp
->cl_lock
);
987 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
989 if (!atomic_dec_and_test(&s
->sc_count
)) {
990 wake_up_all(&close_wq
);
994 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
995 list_add(&stp
->st_locks
, reaplist
);
998 static void unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
1000 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
1002 lockdep_assert_held(&oo
->oo_owner
.so_client
->cl_lock
);
1004 list_del_init(&stp
->st_locks
);
1005 unhash_ol_stateid(stp
);
1006 unhash_stid(&stp
->st_stid
);
1009 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
1011 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
1013 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
1014 unhash_lock_stateid(stp
);
1015 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
1016 nfs4_put_stid(&stp
->st_stid
);
1019 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1021 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1023 lockdep_assert_held(&clp
->cl_lock
);
1025 list_del_init(&lo
->lo_owner
.so_strhash
);
1029 * Free a list of generic stateids that were collected earlier after being
1033 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1035 struct nfs4_ol_stateid
*stp
;
1036 struct nfs4_file
*fp
;
1040 while (!list_empty(reaplist
)) {
1041 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1043 list_del(&stp
->st_locks
);
1044 fp
= stp
->st_stid
.sc_file
;
1045 stp
->st_stid
.sc_free(&stp
->st_stid
);
1051 static void release_lockowner(struct nfs4_lockowner
*lo
)
1053 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1054 struct nfs4_ol_stateid
*stp
;
1055 struct list_head reaplist
;
1057 INIT_LIST_HEAD(&reaplist
);
1059 spin_lock(&clp
->cl_lock
);
1060 unhash_lockowner_locked(lo
);
1061 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
1062 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
1063 struct nfs4_ol_stateid
, st_perstateowner
);
1064 unhash_lock_stateid(stp
);
1065 put_ol_stateid_locked(stp
, &reaplist
);
1067 spin_unlock(&clp
->cl_lock
);
1068 free_ol_stateid_reaplist(&reaplist
);
1069 nfs4_put_stateowner(&lo
->lo_owner
);
1072 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1073 struct list_head
*reaplist
)
1075 struct nfs4_ol_stateid
*stp
;
1077 while (!list_empty(&open_stp
->st_locks
)) {
1078 stp
= list_entry(open_stp
->st_locks
.next
,
1079 struct nfs4_ol_stateid
, st_locks
);
1080 unhash_lock_stateid(stp
);
1081 put_ol_stateid_locked(stp
, reaplist
);
1085 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1086 struct list_head
*reaplist
)
1088 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1090 unhash_ol_stateid(stp
);
1091 release_open_stateid_locks(stp
, reaplist
);
1094 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1096 LIST_HEAD(reaplist
);
1098 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1099 unhash_open_stateid(stp
, &reaplist
);
1100 put_ol_stateid_locked(stp
, &reaplist
);
1101 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1102 free_ol_stateid_reaplist(&reaplist
);
1105 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1107 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1109 lockdep_assert_held(&clp
->cl_lock
);
1111 list_del_init(&oo
->oo_owner
.so_strhash
);
1112 list_del_init(&oo
->oo_perclient
);
1115 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1117 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1119 struct nfs4_ol_stateid
*s
;
1121 spin_lock(&nn
->client_lock
);
1122 s
= oo
->oo_last_closed_stid
;
1124 list_del_init(&oo
->oo_close_lru
);
1125 oo
->oo_last_closed_stid
= NULL
;
1127 spin_unlock(&nn
->client_lock
);
1129 nfs4_put_stid(&s
->st_stid
);
1132 static void release_openowner(struct nfs4_openowner
*oo
)
1134 struct nfs4_ol_stateid
*stp
;
1135 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1136 struct list_head reaplist
;
1138 INIT_LIST_HEAD(&reaplist
);
1140 spin_lock(&clp
->cl_lock
);
1141 unhash_openowner_locked(oo
);
1142 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1143 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1144 struct nfs4_ol_stateid
, st_perstateowner
);
1145 unhash_open_stateid(stp
, &reaplist
);
1146 put_ol_stateid_locked(stp
, &reaplist
);
1148 spin_unlock(&clp
->cl_lock
);
1149 free_ol_stateid_reaplist(&reaplist
);
1150 release_last_closed_stateid(oo
);
1151 nfs4_put_stateowner(&oo
->oo_owner
);
1155 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1157 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1159 return sid
->sequence
% SESSION_HASH_SIZE
;
1164 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1166 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1167 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1171 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1177 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1178 * won't be used for replay.
1180 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1182 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1184 if (nfserr
== nfserr_replay_me
)
1187 if (!seqid_mutating_err(ntohl(nfserr
))) {
1188 nfsd4_cstate_clear_replay(cstate
);
1193 if (so
->so_is_open_owner
)
1194 release_last_closed_stateid(openowner(so
));
1200 gen_sessionid(struct nfsd4_session
*ses
)
1202 struct nfs4_client
*clp
= ses
->se_client
;
1203 struct nfsd4_sessionid
*sid
;
1205 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1206 sid
->clientid
= clp
->cl_clientid
;
1207 sid
->sequence
= current_sessionid
++;
1212 * The protocol defines ca_maxresponssize_cached to include the size of
1213 * the rpc header, but all we need to cache is the data starting after
1214 * the end of the initial SEQUENCE operation--the rest we regenerate
1215 * each time. Therefore we can advertise a ca_maxresponssize_cached
1216 * value that is the number of bytes in our cache plus a few additional
1217 * bytes. In order to stay on the safe side, and not promise more than
1218 * we can cache, those additional bytes must be the minimum possible: 24
1219 * bytes of rpc header (xid through accept state, with AUTH_NULL
1220 * verifier), 12 for the compound header (with zero-length tag), and 44
1221 * for the SEQUENCE op response:
1223 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1226 free_session_slots(struct nfsd4_session
*ses
)
1230 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
1231 kfree(ses
->se_slots
[i
]);
1235 * We don't actually need to cache the rpc and session headers, so we
1236 * can allocate a little less for each slot:
1238 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1242 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1245 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1246 return size
+ sizeof(struct nfsd4_slot
);
1250 * XXX: If we run out of reserved DRC memory we could (up to a point)
1251 * re-negotiate active sessions and reduce their slot usage to make
1252 * room for new connections. For now we just fail the create session.
1254 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1256 u32 slotsize
= slot_bytes(ca
);
1257 u32 num
= ca
->maxreqs
;
1260 spin_lock(&nfsd_drc_lock
);
1261 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1262 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1263 num
= min_t(int, num
, avail
/ slotsize
);
1264 nfsd_drc_mem_used
+= num
* slotsize
;
1265 spin_unlock(&nfsd_drc_lock
);
1270 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1272 int slotsize
= slot_bytes(ca
);
1274 spin_lock(&nfsd_drc_lock
);
1275 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1276 spin_unlock(&nfsd_drc_lock
);
1279 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1280 struct nfsd4_channel_attrs
*battrs
)
1282 int numslots
= fattrs
->maxreqs
;
1283 int slotsize
= slot_bytes(fattrs
);
1284 struct nfsd4_session
*new;
1287 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1288 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1289 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1291 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1294 /* allocate each struct nfsd4_slot and data cache in one piece */
1295 for (i
= 0; i
< numslots
; i
++) {
1296 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1297 if (!new->se_slots
[i
])
1301 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1302 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1307 kfree(new->se_slots
[i
]);
1312 static void free_conn(struct nfsd4_conn
*c
)
1314 svc_xprt_put(c
->cn_xprt
);
1318 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1320 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1321 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1323 spin_lock(&clp
->cl_lock
);
1324 if (!list_empty(&c
->cn_persession
)) {
1325 list_del(&c
->cn_persession
);
1328 nfsd4_probe_callback(clp
);
1329 spin_unlock(&clp
->cl_lock
);
1332 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1334 struct nfsd4_conn
*conn
;
1336 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1339 svc_xprt_get(rqstp
->rq_xprt
);
1340 conn
->cn_xprt
= rqstp
->rq_xprt
;
1341 conn
->cn_flags
= flags
;
1342 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1346 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1348 conn
->cn_session
= ses
;
1349 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1352 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1354 struct nfs4_client
*clp
= ses
->se_client
;
1356 spin_lock(&clp
->cl_lock
);
1357 __nfsd4_hash_conn(conn
, ses
);
1358 spin_unlock(&clp
->cl_lock
);
1361 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1363 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1364 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1367 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1371 nfsd4_hash_conn(conn
, ses
);
1372 ret
= nfsd4_register_conn(conn
);
1374 /* oops; xprt is already down: */
1375 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1376 /* We may have gained or lost a callback channel: */
1377 nfsd4_probe_callback_sync(ses
->se_client
);
1380 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1382 u32 dir
= NFS4_CDFC4_FORE
;
1384 if (cses
->flags
& SESSION4_BACK_CHAN
)
1385 dir
|= NFS4_CDFC4_BACK
;
1386 return alloc_conn(rqstp
, dir
);
1389 /* must be called under client_lock */
1390 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1392 struct nfs4_client
*clp
= s
->se_client
;
1393 struct nfsd4_conn
*c
;
1395 spin_lock(&clp
->cl_lock
);
1396 while (!list_empty(&s
->se_conns
)) {
1397 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1398 list_del_init(&c
->cn_persession
);
1399 spin_unlock(&clp
->cl_lock
);
1401 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1404 spin_lock(&clp
->cl_lock
);
1406 spin_unlock(&clp
->cl_lock
);
1409 static void __free_session(struct nfsd4_session
*ses
)
1411 free_session_slots(ses
);
1415 static void free_session(struct nfsd4_session
*ses
)
1417 nfsd4_del_conns(ses
);
1418 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1419 __free_session(ses
);
1422 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1425 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1427 new->se_client
= clp
;
1430 INIT_LIST_HEAD(&new->se_conns
);
1432 new->se_cb_seq_nr
= 1;
1433 new->se_flags
= cses
->flags
;
1434 new->se_cb_prog
= cses
->callback_prog
;
1435 new->se_cb_sec
= cses
->cb_sec
;
1436 atomic_set(&new->se_ref
, 0);
1437 idx
= hash_sessionid(&new->se_sessionid
);
1438 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1439 spin_lock(&clp
->cl_lock
);
1440 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1441 spin_unlock(&clp
->cl_lock
);
1443 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1444 struct sockaddr
*sa
= svc_addr(rqstp
);
1446 * This is a little silly; with sessions there's no real
1447 * use for the callback address. Use the peer address
1448 * as a reasonable default for now, but consider fixing
1449 * the rpc client not to require an address in the
1452 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1453 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1457 /* caller must hold client_lock */
1458 static struct nfsd4_session
*
1459 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1461 struct nfsd4_session
*elem
;
1463 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1465 lockdep_assert_held(&nn
->client_lock
);
1467 dump_sessionid(__func__
, sessionid
);
1468 idx
= hash_sessionid(sessionid
);
1469 /* Search in the appropriate list */
1470 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1471 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1472 NFS4_MAX_SESSIONID_LEN
)) {
1477 dprintk("%s: session not found\n", __func__
);
1481 static struct nfsd4_session
*
1482 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1485 struct nfsd4_session
*session
;
1486 __be32 status
= nfserr_badsession
;
1488 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1491 status
= nfsd4_get_session_locked(session
);
1499 /* caller must hold client_lock */
1501 unhash_session(struct nfsd4_session
*ses
)
1503 struct nfs4_client
*clp
= ses
->se_client
;
1504 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1506 lockdep_assert_held(&nn
->client_lock
);
1508 list_del(&ses
->se_hash
);
1509 spin_lock(&ses
->se_client
->cl_lock
);
1510 list_del(&ses
->se_perclnt
);
1511 spin_unlock(&ses
->se_client
->cl_lock
);
1514 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1516 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1518 if (clid
->cl_boot
== nn
->boot_time
)
1520 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1521 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1526 * XXX Should we use a slab cache ?
1527 * This type of memory management is somewhat inefficient, but we use it
1528 * anyway since SETCLIENTID is not a common operation.
1530 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1532 struct nfs4_client
*clp
;
1535 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1538 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1539 if (clp
->cl_name
.data
== NULL
)
1541 clp
->cl_ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
1542 OWNER_HASH_SIZE
, GFP_KERNEL
);
1543 if (!clp
->cl_ownerstr_hashtbl
)
1544 goto err_no_hashtbl
;
1545 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1546 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1547 clp
->cl_name
.len
= name
.len
;
1548 INIT_LIST_HEAD(&clp
->cl_sessions
);
1549 idr_init(&clp
->cl_stateids
);
1550 atomic_set(&clp
->cl_refcount
, 0);
1551 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1552 INIT_LIST_HEAD(&clp
->cl_idhash
);
1553 INIT_LIST_HEAD(&clp
->cl_openowners
);
1554 INIT_LIST_HEAD(&clp
->cl_delegations
);
1555 INIT_LIST_HEAD(&clp
->cl_lru
);
1556 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1557 INIT_LIST_HEAD(&clp
->cl_revoked
);
1558 spin_lock_init(&clp
->cl_lock
);
1559 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1562 kfree(clp
->cl_name
.data
);
1569 free_client(struct nfs4_client
*clp
)
1571 while (!list_empty(&clp
->cl_sessions
)) {
1572 struct nfsd4_session
*ses
;
1573 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1575 list_del(&ses
->se_perclnt
);
1576 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1579 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1580 free_svc_cred(&clp
->cl_cred
);
1581 kfree(clp
->cl_ownerstr_hashtbl
);
1582 kfree(clp
->cl_name
.data
);
1583 idr_destroy(&clp
->cl_stateids
);
1587 /* must be called under the client_lock */
1589 unhash_client_locked(struct nfs4_client
*clp
)
1591 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1592 struct nfsd4_session
*ses
;
1594 lockdep_assert_held(&nn
->client_lock
);
1596 /* Mark the client as expired! */
1598 /* Make it invisible */
1599 if (!list_empty(&clp
->cl_idhash
)) {
1600 list_del_init(&clp
->cl_idhash
);
1601 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1602 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1604 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1606 list_del_init(&clp
->cl_lru
);
1607 spin_lock(&clp
->cl_lock
);
1608 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1609 list_del_init(&ses
->se_hash
);
1610 spin_unlock(&clp
->cl_lock
);
1614 unhash_client(struct nfs4_client
*clp
)
1616 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1618 spin_lock(&nn
->client_lock
);
1619 unhash_client_locked(clp
);
1620 spin_unlock(&nn
->client_lock
);
1623 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1625 if (atomic_read(&clp
->cl_refcount
))
1626 return nfserr_jukebox
;
1627 unhash_client_locked(clp
);
1632 __destroy_client(struct nfs4_client
*clp
)
1634 struct nfs4_openowner
*oo
;
1635 struct nfs4_delegation
*dp
;
1636 struct list_head reaplist
;
1638 INIT_LIST_HEAD(&reaplist
);
1639 spin_lock(&state_lock
);
1640 while (!list_empty(&clp
->cl_delegations
)) {
1641 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1642 unhash_delegation_locked(dp
);
1643 list_add(&dp
->dl_recall_lru
, &reaplist
);
1645 spin_unlock(&state_lock
);
1646 while (!list_empty(&reaplist
)) {
1647 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1648 list_del_init(&dp
->dl_recall_lru
);
1649 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
1650 nfs4_put_stid(&dp
->dl_stid
);
1652 while (!list_empty(&clp
->cl_revoked
)) {
1653 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1654 list_del_init(&dp
->dl_recall_lru
);
1655 nfs4_put_stid(&dp
->dl_stid
);
1657 while (!list_empty(&clp
->cl_openowners
)) {
1658 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1659 nfs4_get_stateowner(&oo
->oo_owner
);
1660 release_openowner(oo
);
1662 nfsd4_shutdown_callback(clp
);
1663 if (clp
->cl_cb_conn
.cb_xprt
)
1664 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1669 destroy_client(struct nfs4_client
*clp
)
1672 __destroy_client(clp
);
1675 static void expire_client(struct nfs4_client
*clp
)
1678 nfsd4_client_record_remove(clp
);
1679 __destroy_client(clp
);
1682 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1684 memcpy(target
->cl_verifier
.data
, source
->data
,
1685 sizeof(target
->cl_verifier
.data
));
1688 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1690 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1691 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1694 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1696 if (source
->cr_principal
) {
1697 target
->cr_principal
=
1698 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1699 if (target
->cr_principal
== NULL
)
1702 target
->cr_principal
= NULL
;
1703 target
->cr_flavor
= source
->cr_flavor
;
1704 target
->cr_uid
= source
->cr_uid
;
1705 target
->cr_gid
= source
->cr_gid
;
1706 target
->cr_group_info
= source
->cr_group_info
;
1707 get_group_info(target
->cr_group_info
);
1708 target
->cr_gss_mech
= source
->cr_gss_mech
;
1709 if (source
->cr_gss_mech
)
1710 gss_mech_get(source
->cr_gss_mech
);
1715 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1719 res
= o1
->len
- o2
->len
;
1722 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1725 static int same_name(const char *n1
, const char *n2
)
1727 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1731 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1733 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1737 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1739 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1742 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1746 if (g1
->ngroups
!= g2
->ngroups
)
1748 for (i
=0; i
<g1
->ngroups
; i
++)
1749 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1755 * RFC 3530 language requires clid_inuse be returned when the
1756 * "principal" associated with a requests differs from that previously
1757 * used. We use uid, gid's, and gss principal string as our best
1758 * approximation. We also don't want to allow non-gss use of a client
1759 * established using gss: in theory cr_principal should catch that
1760 * change, but in practice cr_principal can be null even in the gss case
1761 * since gssd doesn't always pass down a principal string.
1763 static bool is_gss_cred(struct svc_cred
*cr
)
1765 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1766 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1771 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1773 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1774 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1775 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1776 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1778 if (cr1
->cr_principal
== cr2
->cr_principal
)
1780 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1782 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1785 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1787 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1790 if (!cr
->cr_gss_mech
)
1792 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1793 return service
== RPC_GSS_SVC_INTEGRITY
||
1794 service
== RPC_GSS_SVC_PRIVACY
;
1797 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1799 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1801 if (!cl
->cl_mach_cred
)
1803 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1805 if (!svc_rqst_integrity_protected(rqstp
))
1807 if (!cr
->cr_principal
)
1809 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1812 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1817 * This is opaque to client, so no need to byte-swap. Use
1818 * __force to keep sparse happy
1820 verf
[0] = (__force __be32
)get_seconds();
1821 verf
[1] = (__force __be32
)nn
->clientid_counter
;
1822 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1825 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1827 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1828 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
1829 gen_confirm(clp
, nn
);
1832 static struct nfs4_stid
*
1833 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
1835 struct nfs4_stid
*ret
;
1837 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1838 if (!ret
|| !ret
->sc_type
)
1843 static struct nfs4_stid
*
1844 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1846 struct nfs4_stid
*s
;
1848 spin_lock(&cl
->cl_lock
);
1849 s
= find_stateid_locked(cl
, t
);
1851 if (typemask
& s
->sc_type
)
1852 atomic_inc(&s
->sc_count
);
1856 spin_unlock(&cl
->cl_lock
);
1860 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1861 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1863 struct nfs4_client
*clp
;
1864 struct sockaddr
*sa
= svc_addr(rqstp
);
1866 struct net
*net
= SVC_NET(rqstp
);
1868 clp
= alloc_client(name
);
1872 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1877 nfsd4_init_cb(&clp
->cl_cb_null
, clp
, NULL
, NFSPROC4_CLNT_CB_NULL
);
1878 clp
->cl_time
= get_seconds();
1879 clear_bit(0, &clp
->cl_cb_slot_busy
);
1880 copy_verf(clp
, verf
);
1881 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1882 clp
->cl_cb_session
= NULL
;
1888 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1890 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1891 struct nfs4_client
*clp
;
1894 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1897 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1898 new = &((*new)->rb_left
);
1900 new = &((*new)->rb_right
);
1903 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1904 rb_insert_color(&new_clp
->cl_namenode
, root
);
1907 static struct nfs4_client
*
1908 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1911 struct rb_node
*node
= root
->rb_node
;
1912 struct nfs4_client
*clp
;
1915 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1916 cmp
= compare_blob(&clp
->cl_name
, name
);
1918 node
= node
->rb_left
;
1920 node
= node
->rb_right
;
1928 add_to_unconfirmed(struct nfs4_client
*clp
)
1930 unsigned int idhashval
;
1931 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1933 lockdep_assert_held(&nn
->client_lock
);
1935 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1936 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1937 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1938 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1939 renew_client_locked(clp
);
1943 move_to_confirmed(struct nfs4_client
*clp
)
1945 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1946 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1948 lockdep_assert_held(&nn
->client_lock
);
1950 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1951 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1952 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1953 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1954 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1955 renew_client_locked(clp
);
1958 static struct nfs4_client
*
1959 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1961 struct nfs4_client
*clp
;
1962 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1964 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1965 if (same_clid(&clp
->cl_clientid
, clid
)) {
1966 if ((bool)clp
->cl_minorversion
!= sessions
)
1968 renew_client_locked(clp
);
1975 static struct nfs4_client
*
1976 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1978 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1980 lockdep_assert_held(&nn
->client_lock
);
1981 return find_client_in_id_table(tbl
, clid
, sessions
);
1984 static struct nfs4_client
*
1985 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1987 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1989 lockdep_assert_held(&nn
->client_lock
);
1990 return find_client_in_id_table(tbl
, clid
, sessions
);
1993 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1995 return clp
->cl_exchange_flags
!= 0;
1998 static struct nfs4_client
*
1999 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2001 lockdep_assert_held(&nn
->client_lock
);
2002 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
2005 static struct nfs4_client
*
2006 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2008 lockdep_assert_held(&nn
->client_lock
);
2009 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2013 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2015 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2016 struct sockaddr
*sa
= svc_addr(rqstp
);
2017 u32 scopeid
= rpc_get_scope_id(sa
);
2018 unsigned short expected_family
;
2020 /* Currently, we only support tcp and tcp6 for the callback channel */
2021 if (se
->se_callback_netid_len
== 3 &&
2022 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2023 expected_family
= AF_INET
;
2024 else if (se
->se_callback_netid_len
== 4 &&
2025 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2026 expected_family
= AF_INET6
;
2030 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2031 se
->se_callback_addr_len
,
2032 (struct sockaddr
*)&conn
->cb_addr
,
2033 sizeof(conn
->cb_addr
));
2035 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2038 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2039 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2041 conn
->cb_prog
= se
->se_callback_prog
;
2042 conn
->cb_ident
= se
->se_callback_ident
;
2043 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2046 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2047 conn
->cb_addrlen
= 0;
2048 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
2049 "will not receive delegations\n",
2050 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2056 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2059 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2061 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2062 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2065 dprintk("--> %s slot %p\n", __func__
, slot
);
2067 slot
->sl_opcnt
= resp
->opcnt
;
2068 slot
->sl_status
= resp
->cstate
.status
;
2070 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2071 if (nfsd4_not_cached(resp
)) {
2072 slot
->sl_datalen
= 0;
2075 base
= resp
->cstate
.data_offset
;
2076 slot
->sl_datalen
= buf
->len
- base
;
2077 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2078 WARN("%s: sessions DRC could not cache compound\n", __func__
);
2083 * Encode the replay sequence operation from the slot values.
2084 * If cachethis is FALSE encode the uncached rep error on the next
2085 * operation which sets resp->p and increments resp->opcnt for
2086 * nfs4svc_encode_compoundres.
2090 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2091 struct nfsd4_compoundres
*resp
)
2093 struct nfsd4_op
*op
;
2094 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2096 /* Encode the replayed sequence operation */
2097 op
= &args
->ops
[resp
->opcnt
- 1];
2098 nfsd4_encode_operation(resp
, op
);
2100 /* Return nfserr_retry_uncached_rep in next operation. */
2101 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
2102 op
= &args
->ops
[resp
->opcnt
++];
2103 op
->status
= nfserr_retry_uncached_rep
;
2104 nfsd4_encode_operation(resp
, op
);
2110 * The sequence operation is not cached because we can use the slot and
2114 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2115 struct nfsd4_sequence
*seq
)
2117 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2118 struct xdr_stream
*xdr
= &resp
->xdr
;
2122 dprintk("--> %s slot %p\n", __func__
, slot
);
2124 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2128 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2131 return nfserr_serverfault
;
2133 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2134 xdr_commit_encode(xdr
);
2136 resp
->opcnt
= slot
->sl_opcnt
;
2137 return slot
->sl_status
;
2141 * Set the exchange_id flags returned by the server.
2144 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2146 /* pNFS is not supported */
2147 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2149 /* Referrals are supported, Migration is not. */
2150 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2152 /* set the wire flags to return to client. */
2153 clid
->flags
= new->cl_exchange_flags
;
2156 static bool client_has_state(struct nfs4_client
*clp
)
2159 * Note clp->cl_openowners check isn't quite right: there's no
2160 * need to count owners without stateid's.
2162 * Also note we should probably be using this in 4.0 case too.
2164 return !list_empty(&clp
->cl_openowners
)
2165 || !list_empty(&clp
->cl_delegations
)
2166 || !list_empty(&clp
->cl_sessions
);
2170 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
2171 struct nfsd4_compound_state
*cstate
,
2172 struct nfsd4_exchange_id
*exid
)
2174 struct nfs4_client
*conf
, *new;
2175 struct nfs4_client
*unconf
= NULL
;
2177 char addr_str
[INET6_ADDRSTRLEN
];
2178 nfs4_verifier verf
= exid
->verifier
;
2179 struct sockaddr
*sa
= svc_addr(rqstp
);
2180 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2181 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2183 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2184 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2185 "ip_addr=%s flags %x, spa_how %d\n",
2186 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2187 addr_str
, exid
->flags
, exid
->spa_how
);
2189 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2190 return nfserr_inval
;
2192 switch (exid
->spa_how
) {
2194 if (!svc_rqst_integrity_protected(rqstp
))
2195 return nfserr_inval
;
2198 default: /* checked by xdr code */
2201 return nfserr_encr_alg_unsupp
;
2204 new = create_client(exid
->clname
, rqstp
, &verf
);
2206 return nfserr_jukebox
;
2208 /* Cases below refer to rfc 5661 section 18.35.4: */
2209 spin_lock(&nn
->client_lock
);
2210 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2212 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2213 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2216 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2217 status
= nfserr_inval
;
2220 if (!mach_creds_match(conf
, rqstp
)) {
2221 status
= nfserr_wrong_cred
;
2224 if (!creds_match
) { /* case 9 */
2225 status
= nfserr_perm
;
2228 if (!verfs_match
) { /* case 8 */
2229 status
= nfserr_not_same
;
2233 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2236 if (!creds_match
) { /* case 3 */
2237 if (client_has_state(conf
)) {
2238 status
= nfserr_clid_inuse
;
2243 if (verfs_match
) { /* case 2 */
2244 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2247 /* case 5, client reboot */
2252 if (update
) { /* case 7 */
2253 status
= nfserr_noent
;
2257 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2258 if (unconf
) /* case 4, possible retry or client restart */
2259 unhash_client_locked(unconf
);
2261 /* case 1 (normal case) */
2264 status
= mark_client_expired_locked(conf
);
2268 new->cl_minorversion
= cstate
->minorversion
;
2269 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
2272 add_to_unconfirmed(new);
2275 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2276 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2278 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2279 nfsd4_set_ex_flags(conf
, exid
);
2281 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2282 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2286 spin_unlock(&nn
->client_lock
);
2290 expire_client(unconf
);
2295 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2297 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2300 /* The slot is in use, and no response has been sent. */
2302 if (seqid
== slot_seqid
)
2303 return nfserr_jukebox
;
2305 return nfserr_seq_misordered
;
2307 /* Note unsigned 32-bit arithmetic handles wraparound: */
2308 if (likely(seqid
== slot_seqid
+ 1))
2310 if (seqid
== slot_seqid
)
2311 return nfserr_replay_cache
;
2312 return nfserr_seq_misordered
;
2316 * Cache the create session result into the create session single DRC
2317 * slot cache by saving the xdr structure. sl_seqid has been set.
2318 * Do this for solo or embedded create session operations.
2321 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2322 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2324 slot
->sl_status
= nfserr
;
2325 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2329 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2330 struct nfsd4_clid_slot
*slot
)
2332 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2333 return slot
->sl_status
;
2336 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2337 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2338 1 + /* MIN tag is length with zero, only length */ \
2339 3 + /* version, opcount, opcode */ \
2340 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2341 /* seqid, slotID, slotID, cache */ \
2342 4 ) * sizeof(__be32))
2344 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2345 2 + /* verifier: AUTH_NULL, length 0 */\
2347 1 + /* MIN tag is length with zero, only length */ \
2348 3 + /* opcount, opcode, opstatus*/ \
2349 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2350 /* seqid, slotID, slotID, slotID, status */ \
2351 5 ) * sizeof(__be32))
2353 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2355 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2357 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2358 return nfserr_toosmall
;
2359 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2360 return nfserr_toosmall
;
2361 ca
->headerpadsz
= 0;
2362 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2363 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2364 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2365 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2366 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2367 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2369 * Note decreasing slot size below client's request may make it
2370 * difficult for client to function correctly, whereas
2371 * decreasing the number of slots will (just?) affect
2372 * performance. When short on memory we therefore prefer to
2373 * decrease number of slots instead of their size. Clients that
2374 * request larger slots than they need will get poor results:
2376 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2378 return nfserr_jukebox
;
2383 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2384 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2385 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2386 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2388 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2390 ca
->headerpadsz
= 0;
2393 * These RPC_MAX_HEADER macros are overkill, especially since we
2394 * don't even do gss on the backchannel yet. But this is still
2395 * less than 1k. Tighten up this estimate in the unlikely event
2396 * it turns out to be a problem for some client:
2398 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2399 return nfserr_toosmall
;
2400 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2401 return nfserr_toosmall
;
2402 ca
->maxresp_cached
= 0;
2404 return nfserr_toosmall
;
2409 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2411 switch (cbs
->flavor
) {
2417 * GSS case: the spec doesn't allow us to return this
2418 * error. But it also doesn't allow us not to support
2420 * I'd rather this fail hard than return some error the
2421 * client might think it can already handle:
2423 return nfserr_encr_alg_unsupp
;
2428 nfsd4_create_session(struct svc_rqst
*rqstp
,
2429 struct nfsd4_compound_state
*cstate
,
2430 struct nfsd4_create_session
*cr_ses
)
2432 struct sockaddr
*sa
= svc_addr(rqstp
);
2433 struct nfs4_client
*conf
, *unconf
;
2434 struct nfs4_client
*old
= NULL
;
2435 struct nfsd4_session
*new;
2436 struct nfsd4_conn
*conn
;
2437 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2439 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2441 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2442 return nfserr_inval
;
2443 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2446 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2449 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2451 goto out_release_drc_mem
;
2452 status
= nfserr_jukebox
;
2453 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2455 goto out_release_drc_mem
;
2456 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2458 goto out_free_session
;
2460 spin_lock(&nn
->client_lock
);
2461 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2462 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2463 WARN_ON_ONCE(conf
&& unconf
);
2466 status
= nfserr_wrong_cred
;
2467 if (!mach_creds_match(conf
, rqstp
))
2469 cs_slot
= &conf
->cl_cs_slot
;
2470 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2471 if (status
== nfserr_replay_cache
) {
2472 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2474 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
2475 status
= nfserr_seq_misordered
;
2478 } else if (unconf
) {
2479 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2480 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2481 status
= nfserr_clid_inuse
;
2484 status
= nfserr_wrong_cred
;
2485 if (!mach_creds_match(unconf
, rqstp
))
2487 cs_slot
= &unconf
->cl_cs_slot
;
2488 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2490 /* an unconfirmed replay returns misordered */
2491 status
= nfserr_seq_misordered
;
2494 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2496 status
= mark_client_expired_locked(old
);
2502 move_to_confirmed(unconf
);
2505 status
= nfserr_stale_clientid
;
2510 * We do not support RDMA or persistent sessions
2512 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2513 cr_ses
->flags
&= ~SESSION4_RDMA
;
2515 init_session(rqstp
, new, conf
, cr_ses
);
2516 nfsd4_get_session_locked(new);
2518 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2519 NFS4_MAX_SESSIONID_LEN
);
2520 cs_slot
->sl_seqid
++;
2521 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2523 /* cache solo and embedded create sessions under the client_lock */
2524 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2525 spin_unlock(&nn
->client_lock
);
2526 /* init connection and backchannel */
2527 nfsd4_init_conn(rqstp
, conn
, new);
2528 nfsd4_put_session(new);
2533 spin_unlock(&nn
->client_lock
);
2538 __free_session(new);
2539 out_release_drc_mem
:
2540 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2544 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2547 case NFS4_CDFC4_FORE
:
2548 case NFS4_CDFC4_BACK
:
2550 case NFS4_CDFC4_FORE_OR_BOTH
:
2551 case NFS4_CDFC4_BACK_OR_BOTH
:
2552 *dir
= NFS4_CDFC4_BOTH
;
2555 return nfserr_inval
;
2558 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2560 struct nfsd4_session
*session
= cstate
->session
;
2561 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2564 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2567 spin_lock(&nn
->client_lock
);
2568 session
->se_cb_prog
= bc
->bc_cb_program
;
2569 session
->se_cb_sec
= bc
->bc_cb_sec
;
2570 spin_unlock(&nn
->client_lock
);
2572 nfsd4_probe_callback(session
->se_client
);
2577 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2578 struct nfsd4_compound_state
*cstate
,
2579 struct nfsd4_bind_conn_to_session
*bcts
)
2582 struct nfsd4_conn
*conn
;
2583 struct nfsd4_session
*session
;
2584 struct net
*net
= SVC_NET(rqstp
);
2585 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2587 if (!nfsd4_last_compound_op(rqstp
))
2588 return nfserr_not_only_op
;
2589 spin_lock(&nn
->client_lock
);
2590 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2591 spin_unlock(&nn
->client_lock
);
2593 goto out_no_session
;
2594 status
= nfserr_wrong_cred
;
2595 if (!mach_creds_match(session
->se_client
, rqstp
))
2597 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2600 conn
= alloc_conn(rqstp
, bcts
->dir
);
2601 status
= nfserr_jukebox
;
2604 nfsd4_init_conn(rqstp
, conn
, session
);
2607 nfsd4_put_session(session
);
2612 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2616 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2620 nfsd4_destroy_session(struct svc_rqst
*r
,
2621 struct nfsd4_compound_state
*cstate
,
2622 struct nfsd4_destroy_session
*sessionid
)
2624 struct nfsd4_session
*ses
;
2626 int ref_held_by_me
= 0;
2627 struct net
*net
= SVC_NET(r
);
2628 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2630 status
= nfserr_not_only_op
;
2631 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2632 if (!nfsd4_last_compound_op(r
))
2636 dump_sessionid(__func__
, &sessionid
->sessionid
);
2637 spin_lock(&nn
->client_lock
);
2638 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2640 goto out_client_lock
;
2641 status
= nfserr_wrong_cred
;
2642 if (!mach_creds_match(ses
->se_client
, r
))
2643 goto out_put_session
;
2644 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2646 goto out_put_session
;
2647 unhash_session(ses
);
2648 spin_unlock(&nn
->client_lock
);
2650 nfsd4_probe_callback_sync(ses
->se_client
);
2652 spin_lock(&nn
->client_lock
);
2655 nfsd4_put_session_locked(ses
);
2657 spin_unlock(&nn
->client_lock
);
2662 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2664 struct nfsd4_conn
*c
;
2666 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2667 if (c
->cn_xprt
== xpt
) {
2674 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2676 struct nfs4_client
*clp
= ses
->se_client
;
2677 struct nfsd4_conn
*c
;
2678 __be32 status
= nfs_ok
;
2681 spin_lock(&clp
->cl_lock
);
2682 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2685 status
= nfserr_conn_not_bound_to_session
;
2686 if (clp
->cl_mach_cred
)
2688 __nfsd4_hash_conn(new, ses
);
2689 spin_unlock(&clp
->cl_lock
);
2690 ret
= nfsd4_register_conn(new);
2692 /* oops; xprt is already down: */
2693 nfsd4_conn_lost(&new->cn_xpt_user
);
2696 spin_unlock(&clp
->cl_lock
);
2701 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2703 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2705 return args
->opcnt
> session
->se_fchannel
.maxops
;
2708 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2709 struct nfsd4_session
*session
)
2711 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2713 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2717 nfsd4_sequence(struct svc_rqst
*rqstp
,
2718 struct nfsd4_compound_state
*cstate
,
2719 struct nfsd4_sequence
*seq
)
2721 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2722 struct xdr_stream
*xdr
= &resp
->xdr
;
2723 struct nfsd4_session
*session
;
2724 struct nfs4_client
*clp
;
2725 struct nfsd4_slot
*slot
;
2726 struct nfsd4_conn
*conn
;
2729 struct net
*net
= SVC_NET(rqstp
);
2730 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2732 if (resp
->opcnt
!= 1)
2733 return nfserr_sequence_pos
;
2736 * Will be either used or freed by nfsd4_sequence_check_conn
2739 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2741 return nfserr_jukebox
;
2743 spin_lock(&nn
->client_lock
);
2744 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
2746 goto out_no_session
;
2747 clp
= session
->se_client
;
2749 status
= nfserr_too_many_ops
;
2750 if (nfsd4_session_too_many_ops(rqstp
, session
))
2751 goto out_put_session
;
2753 status
= nfserr_req_too_big
;
2754 if (nfsd4_request_too_big(rqstp
, session
))
2755 goto out_put_session
;
2757 status
= nfserr_badslot
;
2758 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2759 goto out_put_session
;
2761 slot
= session
->se_slots
[seq
->slotid
];
2762 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2764 /* We do not negotiate the number of slots yet, so set the
2765 * maxslots to the session maxreqs which is used to encode
2766 * sr_highest_slotid and the sr_target_slot id to maxslots */
2767 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2769 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2770 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2771 if (status
== nfserr_replay_cache
) {
2772 status
= nfserr_seq_misordered
;
2773 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2774 goto out_put_session
;
2775 cstate
->slot
= slot
;
2776 cstate
->session
= session
;
2778 /* Return the cached reply status and set cstate->status
2779 * for nfsd4_proc_compound processing */
2780 status
= nfsd4_replay_cache_entry(resp
, seq
);
2781 cstate
->status
= nfserr_replay_cache
;
2785 goto out_put_session
;
2787 status
= nfsd4_sequence_check_conn(conn
, session
);
2790 goto out_put_session
;
2792 buflen
= (seq
->cachethis
) ?
2793 session
->se_fchannel
.maxresp_cached
:
2794 session
->se_fchannel
.maxresp_sz
;
2795 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2797 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2798 goto out_put_session
;
2799 svc_reserve(rqstp
, buflen
);
2802 /* Success! bump slot seqid */
2803 slot
->sl_seqid
= seq
->seqid
;
2804 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2806 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2808 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2810 cstate
->slot
= slot
;
2811 cstate
->session
= session
;
2815 switch (clp
->cl_cb_state
) {
2817 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2819 case NFSD4_CB_FAULT
:
2820 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2823 seq
->status_flags
= 0;
2825 if (!list_empty(&clp
->cl_revoked
))
2826 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2830 spin_unlock(&nn
->client_lock
);
2833 nfsd4_put_session_locked(session
);
2834 goto out_no_session
;
2838 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
2840 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
2842 if (nfsd4_has_session(cs
)) {
2843 if (cs
->status
!= nfserr_replay_cache
) {
2844 nfsd4_store_cache_entry(resp
);
2845 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
2847 /* Drop session reference that was taken in nfsd4_sequence() */
2848 nfsd4_put_session(cs
->session
);
2850 put_client_renew(cs
->clp
);
2854 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2856 struct nfs4_client
*conf
, *unconf
;
2857 struct nfs4_client
*clp
= NULL
;
2859 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2861 spin_lock(&nn
->client_lock
);
2862 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2863 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2864 WARN_ON_ONCE(conf
&& unconf
);
2867 if (client_has_state(conf
)) {
2868 status
= nfserr_clientid_busy
;
2871 status
= mark_client_expired_locked(conf
);
2878 status
= nfserr_stale_clientid
;
2881 if (!mach_creds_match(clp
, rqstp
)) {
2883 status
= nfserr_wrong_cred
;
2886 unhash_client_locked(clp
);
2888 spin_unlock(&nn
->client_lock
);
2895 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2899 if (rc
->rca_one_fs
) {
2900 if (!cstate
->current_fh
.fh_dentry
)
2901 return nfserr_nofilehandle
;
2903 * We don't take advantage of the rca_one_fs case.
2904 * That's OK, it's optional, we can safely ignore it.
2909 status
= nfserr_complete_already
;
2910 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2911 &cstate
->session
->se_client
->cl_flags
))
2914 status
= nfserr_stale_clientid
;
2915 if (is_client_expired(cstate
->session
->se_client
))
2917 * The following error isn't really legal.
2918 * But we only get here if the client just explicitly
2919 * destroyed the client. Surely it no longer cares what
2920 * error it gets back on an operation for the dead
2926 nfsd4_client_record_create(cstate
->session
->se_client
);
2932 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2933 struct nfsd4_setclientid
*setclid
)
2935 struct xdr_netobj clname
= setclid
->se_name
;
2936 nfs4_verifier clverifier
= setclid
->se_verf
;
2937 struct nfs4_client
*conf
, *new;
2938 struct nfs4_client
*unconf
= NULL
;
2940 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2942 new = create_client(clname
, rqstp
, &clverifier
);
2944 return nfserr_jukebox
;
2945 /* Cases below refer to rfc 3530 section 14.2.33: */
2946 spin_lock(&nn
->client_lock
);
2947 conf
= find_confirmed_client_by_name(&clname
, nn
);
2950 status
= nfserr_clid_inuse
;
2951 if (clp_used_exchangeid(conf
))
2953 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2954 char addr_str
[INET6_ADDRSTRLEN
];
2955 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2957 dprintk("NFSD: setclientid: string in use by client "
2958 "at %s\n", addr_str
);
2962 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2964 unhash_client_locked(unconf
);
2965 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2966 /* case 1: probable callback update */
2967 copy_clid(new, conf
);
2968 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2970 new->cl_minorversion
= 0;
2971 gen_callback(new, setclid
, rqstp
);
2972 add_to_unconfirmed(new);
2973 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2974 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2975 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2979 spin_unlock(&nn
->client_lock
);
2983 expire_client(unconf
);
2989 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2990 struct nfsd4_compound_state
*cstate
,
2991 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2993 struct nfs4_client
*conf
, *unconf
;
2994 struct nfs4_client
*old
= NULL
;
2995 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2996 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2998 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3000 if (STALE_CLIENTID(clid
, nn
))
3001 return nfserr_stale_clientid
;
3003 spin_lock(&nn
->client_lock
);
3004 conf
= find_confirmed_client(clid
, false, nn
);
3005 unconf
= find_unconfirmed_client(clid
, false, nn
);
3007 * We try hard to give out unique clientid's, so if we get an
3008 * attempt to confirm the same clientid with a different cred,
3009 * there's a bug somewhere. Let's charitably assume it's our
3012 status
= nfserr_serverfault
;
3013 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3015 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3017 /* cases below refer to rfc 3530 section 14.2.34: */
3018 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3019 if (conf
&& !unconf
) /* case 2: probable retransmit */
3021 else /* case 4: client hasn't noticed we rebooted yet? */
3022 status
= nfserr_stale_clientid
;
3026 if (conf
) { /* case 1: callback update */
3028 unhash_client_locked(old
);
3029 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3030 } else { /* case 3: normal case; new or rebooted client */
3031 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3033 status
= mark_client_expired_locked(old
);
3039 move_to_confirmed(unconf
);
3042 get_client_locked(conf
);
3043 spin_unlock(&nn
->client_lock
);
3044 nfsd4_probe_callback(conf
);
3045 spin_lock(&nn
->client_lock
);
3046 put_client_renew_locked(conf
);
3048 spin_unlock(&nn
->client_lock
);
3054 static struct nfs4_file
*nfsd4_alloc_file(void)
3056 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3059 /* OPEN Share state helper functions */
3060 static void nfsd4_init_file(struct nfs4_file
*fp
, struct knfsd_fh
*fh
)
3062 unsigned int hashval
= file_hashval(fh
);
3064 lockdep_assert_held(&state_lock
);
3066 atomic_set(&fp
->fi_ref
, 1);
3067 spin_lock_init(&fp
->fi_lock
);
3068 INIT_LIST_HEAD(&fp
->fi_stateids
);
3069 INIT_LIST_HEAD(&fp
->fi_delegations
);
3070 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3071 fp
->fi_deleg_file
= NULL
;
3072 fp
->fi_had_conflict
= false;
3073 fp
->fi_share_deny
= 0;
3074 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3075 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3076 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3080 nfsd4_free_slabs(void)
3082 kmem_cache_destroy(openowner_slab
);
3083 kmem_cache_destroy(lockowner_slab
);
3084 kmem_cache_destroy(file_slab
);
3085 kmem_cache_destroy(stateid_slab
);
3086 kmem_cache_destroy(deleg_slab
);
3090 nfsd4_init_slabs(void)
3092 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3093 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3094 if (openowner_slab
== NULL
)
3096 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3097 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3098 if (lockowner_slab
== NULL
)
3099 goto out_free_openowner_slab
;
3100 file_slab
= kmem_cache_create("nfsd4_files",
3101 sizeof(struct nfs4_file
), 0, 0, NULL
);
3102 if (file_slab
== NULL
)
3103 goto out_free_lockowner_slab
;
3104 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3105 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3106 if (stateid_slab
== NULL
)
3107 goto out_free_file_slab
;
3108 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3109 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3110 if (deleg_slab
== NULL
)
3111 goto out_free_stateid_slab
;
3114 out_free_stateid_slab
:
3115 kmem_cache_destroy(stateid_slab
);
3117 kmem_cache_destroy(file_slab
);
3118 out_free_lockowner_slab
:
3119 kmem_cache_destroy(lockowner_slab
);
3120 out_free_openowner_slab
:
3121 kmem_cache_destroy(openowner_slab
);
3123 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3127 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3129 rp
->rp_status
= nfserr_serverfault
;
3131 rp
->rp_buf
= rp
->rp_ibuf
;
3132 mutex_init(&rp
->rp_mutex
);
3135 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3136 struct nfs4_stateowner
*so
)
3138 if (!nfsd4_has_session(cstate
)) {
3139 mutex_lock(&so
->so_replay
.rp_mutex
);
3140 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3144 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3146 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3149 cstate
->replay_owner
= NULL
;
3150 mutex_unlock(&so
->so_replay
.rp_mutex
);
3151 nfs4_put_stateowner(so
);
3155 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3157 struct nfs4_stateowner
*sop
;
3159 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3163 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3164 if (!sop
->so_owner
.data
) {
3165 kmem_cache_free(slab
, sop
);
3168 sop
->so_owner
.len
= owner
->len
;
3170 INIT_LIST_HEAD(&sop
->so_stateids
);
3171 sop
->so_client
= clp
;
3172 init_nfs4_replay(&sop
->so_replay
);
3173 atomic_set(&sop
->so_count
, 1);
3177 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3179 lockdep_assert_held(&clp
->cl_lock
);
3181 list_add(&oo
->oo_owner
.so_strhash
,
3182 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3183 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3186 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3188 unhash_openowner_locked(openowner(so
));
3191 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3193 struct nfs4_openowner
*oo
= openowner(so
);
3195 kmem_cache_free(openowner_slab
, oo
);
3198 static const struct nfs4_stateowner_operations openowner_ops
= {
3199 .so_unhash
= nfs4_unhash_openowner
,
3200 .so_free
= nfs4_free_openowner
,
3203 static struct nfs4_openowner
*
3204 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3205 struct nfsd4_compound_state
*cstate
)
3207 struct nfs4_client
*clp
= cstate
->clp
;
3208 struct nfs4_openowner
*oo
, *ret
;
3210 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3213 oo
->oo_owner
.so_ops
= &openowner_ops
;
3214 oo
->oo_owner
.so_is_open_owner
= 1;
3215 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3217 if (nfsd4_has_session(cstate
))
3218 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3220 oo
->oo_last_closed_stid
= NULL
;
3221 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3222 spin_lock(&clp
->cl_lock
);
3223 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3225 hash_openowner(oo
, clp
, strhashval
);
3228 nfs4_free_openowner(&oo
->oo_owner
);
3229 spin_unlock(&clp
->cl_lock
);
3233 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
3234 struct nfs4_openowner
*oo
= open
->op_openowner
;
3236 atomic_inc(&stp
->st_stid
.sc_count
);
3237 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3238 INIT_LIST_HEAD(&stp
->st_locks
);
3239 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3241 stp
->st_stid
.sc_file
= fp
;
3242 stp
->st_access_bmap
= 0;
3243 stp
->st_deny_bmap
= 0;
3244 stp
->st_openstp
= NULL
;
3245 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3246 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3247 spin_lock(&fp
->fi_lock
);
3248 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3249 spin_unlock(&fp
->fi_lock
);
3250 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3254 * In the 4.0 case we need to keep the owners around a little while to handle
3255 * CLOSE replay. We still do need to release any file access that is held by
3256 * them before returning however.
3259 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3261 struct nfs4_ol_stateid
*last
;
3262 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3263 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3266 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3269 * We know that we hold one reference via nfsd4_close, and another
3270 * "persistent" reference for the client. If the refcount is higher
3271 * than 2, then there are still calls in progress that are using this
3272 * stateid. We can't put the sc_file reference until they are finished.
3273 * Wait for the refcount to drop to 2. Since it has been unhashed,
3274 * there should be no danger of the refcount going back up again at
3277 wait_event(close_wq
, atomic_read(&s
->st_stid
.sc_count
) == 2);
3279 release_all_access(s
);
3280 if (s
->st_stid
.sc_file
) {
3281 put_nfs4_file(s
->st_stid
.sc_file
);
3282 s
->st_stid
.sc_file
= NULL
;
3285 spin_lock(&nn
->client_lock
);
3286 last
= oo
->oo_last_closed_stid
;
3287 oo
->oo_last_closed_stid
= s
;
3288 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3289 oo
->oo_time
= get_seconds();
3290 spin_unlock(&nn
->client_lock
);
3292 nfs4_put_stid(&last
->st_stid
);
3295 /* search file_hashtbl[] for file */
3296 static struct nfs4_file
*
3297 find_file_locked(struct knfsd_fh
*fh
)
3299 unsigned int hashval
= file_hashval(fh
);
3300 struct nfs4_file
*fp
;
3302 lockdep_assert_held(&state_lock
);
3304 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3305 if (nfsd_fh_match(&fp
->fi_fhandle
, fh
)) {
3313 static struct nfs4_file
*
3314 find_file(struct knfsd_fh
*fh
)
3316 struct nfs4_file
*fp
;
3318 spin_lock(&state_lock
);
3319 fp
= find_file_locked(fh
);
3320 spin_unlock(&state_lock
);
3324 static struct nfs4_file
*
3325 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3327 struct nfs4_file
*fp
;
3329 spin_lock(&state_lock
);
3330 fp
= find_file_locked(fh
);
3332 nfsd4_init_file(new, fh
);
3335 spin_unlock(&state_lock
);
3341 * Called to check deny when READ with all zero stateid or
3342 * WRITE with all zero or all one stateid
3345 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3347 struct nfs4_file
*fp
;
3348 __be32 ret
= nfs_ok
;
3350 fp
= find_file(¤t_fh
->fh_handle
);
3353 /* Check for conflicting share reservations */
3354 spin_lock(&fp
->fi_lock
);
3355 if (fp
->fi_share_deny
& deny_type
)
3356 ret
= nfserr_locked
;
3357 spin_unlock(&fp
->fi_lock
);
3362 static void nfsd4_cb_recall_prepare(struct nfsd4_callback
*cb
)
3364 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3365 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3368 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3371 * We can't do this in nfsd_break_deleg_cb because it is
3372 * already holding inode->i_lock.
3374 * If the dl_time != 0, then we know that it has already been
3375 * queued for a lease break. Don't queue it again.
3377 spin_lock(&state_lock
);
3378 if (dp
->dl_time
== 0) {
3379 dp
->dl_time
= get_seconds();
3380 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3382 spin_unlock(&state_lock
);
3385 static int nfsd4_cb_recall_done(struct nfsd4_callback
*cb
,
3386 struct rpc_task
*task
)
3388 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3390 switch (task
->tk_status
) {
3394 case -NFS4ERR_BAD_STATEID
:
3396 * Race: client probably got cb_recall before open reply
3397 * granting delegation.
3399 if (dp
->dl_retries
--) {
3400 rpc_delay(task
, 2 * HZ
);
3409 static void nfsd4_cb_recall_release(struct nfsd4_callback
*cb
)
3411 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3413 nfs4_put_stid(&dp
->dl_stid
);
3416 static struct nfsd4_callback_ops nfsd4_cb_recall_ops
= {
3417 .prepare
= nfsd4_cb_recall_prepare
,
3418 .done
= nfsd4_cb_recall_done
,
3419 .release
= nfsd4_cb_recall_release
,
3422 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3425 * We're assuming the state code never drops its reference
3426 * without first removing the lease. Since we're in this lease
3427 * callback (and since the lease code is serialized by the kernel
3428 * lock) we know the server hasn't removed the lease yet, we know
3429 * it's safe to take a reference.
3431 atomic_inc(&dp
->dl_stid
.sc_count
);
3432 nfsd4_run_cb(&dp
->dl_recall
);
3435 /* Called from break_lease() with i_lock held. */
3437 nfsd_break_deleg_cb(struct file_lock
*fl
)
3440 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
3441 struct nfs4_delegation
*dp
;
3444 WARN(1, "(%p)->fl_owner NULL\n", fl
);
3447 if (fp
->fi_had_conflict
) {
3448 WARN(1, "duplicate break on %p\n", fp
);
3452 * We don't want the locks code to timeout the lease for us;
3453 * we'll remove it ourself if a delegation isn't returned
3456 fl
->fl_break_time
= 0;
3458 spin_lock(&fp
->fi_lock
);
3459 fp
->fi_had_conflict
= true;
3461 * If there are no delegations on the list, then return true
3462 * so that the lease code will go ahead and delete it.
3464 if (list_empty(&fp
->fi_delegations
))
3467 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
3468 nfsd_break_one_deleg(dp
);
3469 spin_unlock(&fp
->fi_lock
);
3474 nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
, struct list_head
*dispose
)
3477 return lease_modify(onlist
, arg
, dispose
);
3482 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3483 .lm_break
= nfsd_break_deleg_cb
,
3484 .lm_change
= nfsd_change_deleg_cb
,
3487 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3489 if (nfsd4_has_session(cstate
))
3491 if (seqid
== so
->so_seqid
- 1)
3492 return nfserr_replay_me
;
3493 if (seqid
== so
->so_seqid
)
3495 return nfserr_bad_seqid
;
3498 static __be32
lookup_clientid(clientid_t
*clid
,
3499 struct nfsd4_compound_state
*cstate
,
3500 struct nfsd_net
*nn
)
3502 struct nfs4_client
*found
;
3505 found
= cstate
->clp
;
3506 if (!same_clid(&found
->cl_clientid
, clid
))
3507 return nfserr_stale_clientid
;
3511 if (STALE_CLIENTID(clid
, nn
))
3512 return nfserr_stale_clientid
;
3515 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3516 * cached already then we know this is for is for v4.0 and "sessions"
3519 WARN_ON_ONCE(cstate
->session
);
3520 spin_lock(&nn
->client_lock
);
3521 found
= find_confirmed_client(clid
, false, nn
);
3523 spin_unlock(&nn
->client_lock
);
3524 return nfserr_expired
;
3526 atomic_inc(&found
->cl_refcount
);
3527 spin_unlock(&nn
->client_lock
);
3529 /* Cache the nfs4_client in cstate! */
3530 cstate
->clp
= found
;
3535 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3536 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3538 clientid_t
*clientid
= &open
->op_clientid
;
3539 struct nfs4_client
*clp
= NULL
;
3540 unsigned int strhashval
;
3541 struct nfs4_openowner
*oo
= NULL
;
3544 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3545 return nfserr_stale_clientid
;
3547 * In case we need it later, after we've already created the
3548 * file and don't want to risk a further failure:
3550 open
->op_file
= nfsd4_alloc_file();
3551 if (open
->op_file
== NULL
)
3552 return nfserr_jukebox
;
3554 status
= lookup_clientid(clientid
, cstate
, nn
);
3559 strhashval
= ownerstr_hashval(&open
->op_owner
);
3560 oo
= find_openstateowner_str(strhashval
, open
, clp
);
3561 open
->op_openowner
= oo
;
3565 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3566 /* Replace unconfirmed owners without checking for replay. */
3567 release_openowner(oo
);
3568 open
->op_openowner
= NULL
;
3571 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3576 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3578 return nfserr_jukebox
;
3579 open
->op_openowner
= oo
;
3581 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
3583 return nfserr_jukebox
;
3587 static inline __be32
3588 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3590 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3591 return nfserr_openmode
;
3596 static int share_access_to_flags(u32 share_access
)
3598 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3601 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3603 struct nfs4_stid
*ret
;
3605 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3608 return delegstateid(ret
);
3611 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3613 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3614 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3618 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3619 struct nfs4_delegation
**dp
)
3622 __be32 status
= nfserr_bad_stateid
;
3623 struct nfs4_delegation
*deleg
;
3625 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3628 flags
= share_access_to_flags(open
->op_share_access
);
3629 status
= nfs4_check_delegmode(deleg
, flags
);
3631 nfs4_put_stid(&deleg
->dl_stid
);
3636 if (!nfsd4_is_deleg_cur(open
))
3640 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3644 static struct nfs4_ol_stateid
*
3645 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3647 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3648 struct nfs4_openowner
*oo
= open
->op_openowner
;
3650 spin_lock(&fp
->fi_lock
);
3651 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3652 /* ignore lock owners */
3653 if (local
->st_stateowner
->so_is_open_owner
== 0)
3655 if (local
->st_stateowner
== &oo
->oo_owner
) {
3657 atomic_inc(&ret
->st_stid
.sc_count
);
3661 spin_unlock(&fp
->fi_lock
);
3665 static inline int nfs4_access_to_access(u32 nfs4_access
)
3669 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3670 flags
|= NFSD_MAY_READ
;
3671 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3672 flags
|= NFSD_MAY_WRITE
;
3676 static inline __be32
3677 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3678 struct nfsd4_open
*open
)
3680 struct iattr iattr
= {
3681 .ia_valid
= ATTR_SIZE
,
3684 if (!open
->op_truncate
)
3686 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3687 return nfserr_inval
;
3688 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3691 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3692 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
3693 struct nfsd4_open
*open
)
3695 struct file
*filp
= NULL
;
3697 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3698 int access
= nfs4_access_to_access(open
->op_share_access
);
3699 unsigned char old_access_bmap
, old_deny_bmap
;
3701 spin_lock(&fp
->fi_lock
);
3704 * Are we trying to set a deny mode that would conflict with
3707 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3708 if (status
!= nfs_ok
) {
3709 spin_unlock(&fp
->fi_lock
);
3713 /* set access to the file */
3714 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
3715 if (status
!= nfs_ok
) {
3716 spin_unlock(&fp
->fi_lock
);
3720 /* Set access bits in stateid */
3721 old_access_bmap
= stp
->st_access_bmap
;
3722 set_access(open
->op_share_access
, stp
);
3724 /* Set new deny mask */
3725 old_deny_bmap
= stp
->st_deny_bmap
;
3726 set_deny(open
->op_share_deny
, stp
);
3727 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3729 if (!fp
->fi_fds
[oflag
]) {
3730 spin_unlock(&fp
->fi_lock
);
3731 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
3733 goto out_put_access
;
3734 spin_lock(&fp
->fi_lock
);
3735 if (!fp
->fi_fds
[oflag
]) {
3736 fp
->fi_fds
[oflag
] = filp
;
3740 spin_unlock(&fp
->fi_lock
);
3744 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3746 goto out_put_access
;
3750 stp
->st_access_bmap
= old_access_bmap
;
3751 nfs4_file_put_access(fp
, open
->op_share_access
);
3752 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
3757 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
3760 unsigned char old_deny_bmap
;
3762 if (!test_access(open
->op_share_access
, stp
))
3763 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
3765 /* test and set deny mode */
3766 spin_lock(&fp
->fi_lock
);
3767 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3768 if (status
== nfs_ok
) {
3769 old_deny_bmap
= stp
->st_deny_bmap
;
3770 set_deny(open
->op_share_deny
, stp
);
3771 fp
->fi_share_deny
|=
3772 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3774 spin_unlock(&fp
->fi_lock
);
3776 if (status
!= nfs_ok
)
3779 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3780 if (status
!= nfs_ok
)
3781 reset_union_bmap_deny(old_deny_bmap
, stp
);
3786 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3788 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3791 /* Should we give out recallable state?: */
3792 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3794 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3797 * In the sessions case, since we don't have to establish a
3798 * separate connection for callbacks, we assume it's OK
3799 * until we hear otherwise:
3801 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3804 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_file
*fp
, int flag
)
3806 struct file_lock
*fl
;
3808 fl
= locks_alloc_lock();
3811 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3812 fl
->fl_flags
= FL_DELEG
;
3813 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3814 fl
->fl_end
= OFFSET_MAX
;
3815 fl
->fl_owner
= (fl_owner_t
)fp
;
3816 fl
->fl_pid
= current
->tgid
;
3820 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3822 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
3823 struct file_lock
*fl
, *ret
;
3827 fl
= nfs4_alloc_init_lease(fp
, NFS4_OPEN_DELEGATE_READ
);
3830 filp
= find_readable_file(fp
);
3832 /* We should always have a readable file here */
3838 status
= vfs_setlease(filp
, fl
->fl_type
, &fl
, NULL
);
3840 locks_free_lock(fl
);
3843 spin_lock(&state_lock
);
3844 spin_lock(&fp
->fi_lock
);
3845 /* Did the lease get broken before we took the lock? */
3847 if (fp
->fi_had_conflict
)
3850 if (fp
->fi_deleg_file
) {
3852 atomic_inc(&fp
->fi_delegees
);
3853 hash_delegation_locked(dp
, fp
);
3856 fp
->fi_deleg_file
= filp
;
3857 atomic_set(&fp
->fi_delegees
, 1);
3858 hash_delegation_locked(dp
, fp
);
3859 spin_unlock(&fp
->fi_lock
);
3860 spin_unlock(&state_lock
);
3863 spin_unlock(&fp
->fi_lock
);
3864 spin_unlock(&state_lock
);
3870 static struct nfs4_delegation
*
3871 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
3872 struct nfs4_file
*fp
)
3875 struct nfs4_delegation
*dp
;
3877 if (fp
->fi_had_conflict
)
3878 return ERR_PTR(-EAGAIN
);
3880 dp
= alloc_init_deleg(clp
, fh
);
3882 return ERR_PTR(-ENOMEM
);
3885 spin_lock(&state_lock
);
3886 spin_lock(&fp
->fi_lock
);
3887 dp
->dl_stid
.sc_file
= fp
;
3888 if (!fp
->fi_deleg_file
) {
3889 spin_unlock(&fp
->fi_lock
);
3890 spin_unlock(&state_lock
);
3891 status
= nfs4_setlease(dp
);
3894 atomic_inc(&fp
->fi_delegees
);
3895 if (fp
->fi_had_conflict
) {
3899 hash_delegation_locked(dp
, fp
);
3902 spin_unlock(&fp
->fi_lock
);
3903 spin_unlock(&state_lock
);
3906 nfs4_put_stid(&dp
->dl_stid
);
3907 return ERR_PTR(status
);
3912 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3914 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3915 if (status
== -EAGAIN
)
3916 open
->op_why_no_deleg
= WND4_CONTENTION
;
3918 open
->op_why_no_deleg
= WND4_RESOURCE
;
3919 switch (open
->op_deleg_want
) {
3920 case NFS4_SHARE_WANT_READ_DELEG
:
3921 case NFS4_SHARE_WANT_WRITE_DELEG
:
3922 case NFS4_SHARE_WANT_ANY_DELEG
:
3924 case NFS4_SHARE_WANT_CANCEL
:
3925 open
->op_why_no_deleg
= WND4_CANCELLED
;
3927 case NFS4_SHARE_WANT_NO_DELEG
:
3934 * Attempt to hand out a delegation.
3936 * Note we don't support write delegations, and won't until the vfs has
3937 * proper support for them.
3940 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
3941 struct nfs4_ol_stateid
*stp
)
3943 struct nfs4_delegation
*dp
;
3944 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
3945 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
3949 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3950 open
->op_recall
= 0;
3951 switch (open
->op_claim_type
) {
3952 case NFS4_OPEN_CLAIM_PREVIOUS
:
3954 open
->op_recall
= 1;
3955 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3958 case NFS4_OPEN_CLAIM_NULL
:
3959 case NFS4_OPEN_CLAIM_FH
:
3961 * Let's not give out any delegations till everyone's
3962 * had the chance to reclaim theirs....
3964 if (locks_in_grace(clp
->net
))
3966 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3969 * Also, if the file was opened for write or
3970 * create, there's a good chance the client's
3971 * about to write to it, resulting in an
3972 * immediate recall (since we don't support
3973 * write delegations):
3975 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3977 if (open
->op_create
== NFS4_OPEN_CREATE
)
3983 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
);
3987 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3989 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3990 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3991 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3992 nfs4_put_stid(&dp
->dl_stid
);
3995 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3996 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3997 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3998 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3999 open
->op_recall
= 1;
4002 /* 4.1 client asking for a delegation? */
4003 if (open
->op_deleg_want
)
4004 nfsd4_open_deleg_none_ext(open
, status
);
4008 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
4009 struct nfs4_delegation
*dp
)
4011 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
4012 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4013 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4014 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
4015 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
4016 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4017 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4018 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
4020 /* Otherwise the client must be confused wanting a delegation
4021 * it already has, therefore we don't return
4022 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4027 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
4029 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
4030 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
4031 struct nfs4_file
*fp
= NULL
;
4032 struct nfs4_ol_stateid
*stp
= NULL
;
4033 struct nfs4_delegation
*dp
= NULL
;
4037 * Lookup file; if found, lookup stateid and check open request,
4038 * and check for delegations in the process of being recalled.
4039 * If not found, create the nfs4_file struct
4041 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4042 if (fp
!= open
->op_file
) {
4043 status
= nfs4_check_deleg(cl
, open
, &dp
);
4046 stp
= nfsd4_find_existing_open(fp
, open
);
4048 open
->op_file
= NULL
;
4049 status
= nfserr_bad_stateid
;
4050 if (nfsd4_is_deleg_cur(open
))
4052 status
= nfserr_jukebox
;
4056 * OPEN the file, or upgrade an existing OPEN.
4057 * If truncate fails, the OPEN fails.
4060 /* Stateid was found, this is an OPEN upgrade */
4061 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4066 open
->op_stp
= NULL
;
4067 init_open_stateid(stp
, fp
, open
);
4068 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4070 release_open_stateid(stp
);
4074 update_stateid(&stp
->st_stid
.sc_stateid
);
4075 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4077 if (nfsd4_has_session(&resp
->cstate
)) {
4078 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4079 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4080 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4086 * Attempt to hand out a delegation. No error return, because the
4087 * OPEN succeeds even if we fail.
4089 nfs4_open_delegation(current_fh
, open
, stp
);
4093 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4094 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4096 /* 4.1 client trying to upgrade/downgrade delegation? */
4097 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4098 open
->op_deleg_want
)
4099 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4103 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4104 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
4106 * To finish the open response, we just need to set the rflags.
4108 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4109 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
4110 !nfsd4_has_session(&resp
->cstate
))
4111 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4113 nfs4_put_stid(&dp
->dl_stid
);
4115 nfs4_put_stid(&stp
->st_stid
);
4120 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4121 struct nfsd4_open
*open
, __be32 status
)
4123 if (open
->op_openowner
) {
4124 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4126 nfsd4_cstate_assign_replay(cstate
, so
);
4127 nfs4_put_stateowner(so
);
4130 nfsd4_free_file(open
->op_file
);
4132 nfs4_put_stid(&open
->op_stp
->st_stid
);
4136 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4139 struct nfs4_client
*clp
;
4141 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4143 dprintk("process_renew(%08x/%08x): starting\n",
4144 clid
->cl_boot
, clid
->cl_id
);
4145 status
= lookup_clientid(clid
, cstate
, nn
);
4149 status
= nfserr_cb_path_down
;
4150 if (!list_empty(&clp
->cl_delegations
)
4151 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4159 nfsd4_end_grace(struct nfsd_net
*nn
)
4161 /* do nothing if grace period already ended */
4162 if (nn
->grace_ended
)
4165 dprintk("NFSD: end of grace period\n");
4166 nn
->grace_ended
= true;
4168 * If the server goes down again right now, an NFSv4
4169 * client will still be allowed to reclaim after it comes back up,
4170 * even if it hasn't yet had a chance to reclaim state this time.
4173 nfsd4_record_grace_done(nn
);
4175 * At this point, NFSv4 clients can still reclaim. But if the
4176 * server crashes, any that have not yet reclaimed will be out
4177 * of luck on the next boot.
4179 * (NFSv4.1+ clients are considered to have reclaimed once they
4180 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4181 * have reclaimed after their first OPEN.)
4183 locks_end_grace(&nn
->nfsd4_manager
);
4185 * At this point, and once lockd and/or any other containers
4186 * exit their grace period, further reclaims will fail and
4187 * regular locking can resume.
4192 nfs4_laundromat(struct nfsd_net
*nn
)
4194 struct nfs4_client
*clp
;
4195 struct nfs4_openowner
*oo
;
4196 struct nfs4_delegation
*dp
;
4197 struct nfs4_ol_stateid
*stp
;
4198 struct list_head
*pos
, *next
, reaplist
;
4199 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4200 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4202 dprintk("NFSD: laundromat service - starting\n");
4203 nfsd4_end_grace(nn
);
4204 INIT_LIST_HEAD(&reaplist
);
4205 spin_lock(&nn
->client_lock
);
4206 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4207 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4208 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4209 t
= clp
->cl_time
- cutoff
;
4210 new_timeo
= min(new_timeo
, t
);
4213 if (mark_client_expired_locked(clp
)) {
4214 dprintk("NFSD: client in use (clientid %08x)\n",
4215 clp
->cl_clientid
.cl_id
);
4218 list_add(&clp
->cl_lru
, &reaplist
);
4220 spin_unlock(&nn
->client_lock
);
4221 list_for_each_safe(pos
, next
, &reaplist
) {
4222 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4223 dprintk("NFSD: purging unused client (clientid %08x)\n",
4224 clp
->cl_clientid
.cl_id
);
4225 list_del_init(&clp
->cl_lru
);
4228 spin_lock(&state_lock
);
4229 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4230 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4231 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
4233 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4234 t
= dp
->dl_time
- cutoff
;
4235 new_timeo
= min(new_timeo
, t
);
4238 unhash_delegation_locked(dp
);
4239 list_add(&dp
->dl_recall_lru
, &reaplist
);
4241 spin_unlock(&state_lock
);
4242 while (!list_empty(&reaplist
)) {
4243 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4245 list_del_init(&dp
->dl_recall_lru
);
4246 revoke_delegation(dp
);
4249 spin_lock(&nn
->client_lock
);
4250 while (!list_empty(&nn
->close_lru
)) {
4251 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4253 if (time_after((unsigned long)oo
->oo_time
,
4254 (unsigned long)cutoff
)) {
4255 t
= oo
->oo_time
- cutoff
;
4256 new_timeo
= min(new_timeo
, t
);
4259 list_del_init(&oo
->oo_close_lru
);
4260 stp
= oo
->oo_last_closed_stid
;
4261 oo
->oo_last_closed_stid
= NULL
;
4262 spin_unlock(&nn
->client_lock
);
4263 nfs4_put_stid(&stp
->st_stid
);
4264 spin_lock(&nn
->client_lock
);
4266 spin_unlock(&nn
->client_lock
);
4268 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4272 static struct workqueue_struct
*laundry_wq
;
4273 static void laundromat_main(struct work_struct
*);
4276 laundromat_main(struct work_struct
*laundry
)
4279 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
4281 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4284 t
= nfs4_laundromat(nn
);
4285 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4286 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4289 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
4291 if (!nfsd_fh_match(&fhp
->fh_handle
, &stp
->st_stid
.sc_file
->fi_fhandle
))
4292 return nfserr_bad_stateid
;
4297 access_permit_read(struct nfs4_ol_stateid
*stp
)
4299 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4300 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4301 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4305 access_permit_write(struct nfs4_ol_stateid
*stp
)
4307 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4308 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4312 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4314 __be32 status
= nfserr_openmode
;
4316 /* For lock stateid's, we test the parent open, not the lock: */
4317 if (stp
->st_openstp
)
4318 stp
= stp
->st_openstp
;
4319 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4321 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4328 static inline __be32
4329 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4331 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4333 else if (locks_in_grace(net
)) {
4334 /* Answer in remaining cases depends on existence of
4335 * conflicting state; so we must wait out the grace period. */
4336 return nfserr_grace
;
4337 } else if (flags
& WR_STATE
)
4338 return nfs4_share_conflict(current_fh
,
4339 NFS4_SHARE_DENY_WRITE
);
4340 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4341 return nfs4_share_conflict(current_fh
,
4342 NFS4_SHARE_DENY_READ
);
4346 * Allow READ/WRITE during grace period on recovered state only for files
4347 * that are not able to provide mandatory locking.
4350 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4352 return locks_in_grace(net
) && mandatory_lock(inode
);
4355 /* Returns true iff a is later than b: */
4356 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
4358 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
4361 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4364 * When sessions are used the stateid generation number is ignored
4367 if (has_session
&& in
->si_generation
== 0)
4370 if (in
->si_generation
== ref
->si_generation
)
4373 /* If the client sends us a stateid from the future, it's buggy: */
4374 if (stateid_generation_after(in
, ref
))
4375 return nfserr_bad_stateid
;
4377 * However, we could see a stateid from the past, even from a
4378 * non-buggy client. For example, if the client sends a lock
4379 * while some IO is outstanding, the lock may bump si_generation
4380 * while the IO is still in flight. The client could avoid that
4381 * situation by waiting for responses on all the IO requests,
4382 * but better performance may result in retrying IO that
4383 * receives an old_stateid error if requests are rarely
4384 * reordered in flight:
4386 return nfserr_old_stateid
;
4389 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4391 struct nfs4_stid
*s
;
4392 struct nfs4_ol_stateid
*ols
;
4393 __be32 status
= nfserr_bad_stateid
;
4395 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4397 /* Client debugging aid. */
4398 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4399 char addr_str
[INET6_ADDRSTRLEN
];
4400 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4402 pr_warn_ratelimited("NFSD: client %s testing state ID "
4403 "with incorrect client ID\n", addr_str
);
4406 spin_lock(&cl
->cl_lock
);
4407 s
= find_stateid_locked(cl
, stateid
);
4410 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4413 switch (s
->sc_type
) {
4414 case NFS4_DELEG_STID
:
4417 case NFS4_REVOKED_DELEG_STID
:
4418 status
= nfserr_deleg_revoked
;
4420 case NFS4_OPEN_STID
:
4421 case NFS4_LOCK_STID
:
4422 ols
= openlockstateid(s
);
4423 if (ols
->st_stateowner
->so_is_open_owner
4424 && !(openowner(ols
->st_stateowner
)->oo_flags
4425 & NFS4_OO_CONFIRMED
))
4426 status
= nfserr_bad_stateid
;
4431 printk("unknown stateid type %x\n", s
->sc_type
);
4433 case NFS4_CLOSED_STID
:
4434 case NFS4_CLOSED_DELEG_STID
:
4435 status
= nfserr_bad_stateid
;
4438 spin_unlock(&cl
->cl_lock
);
4443 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4444 stateid_t
*stateid
, unsigned char typemask
,
4445 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4449 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4450 return nfserr_bad_stateid
;
4451 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
4452 if (status
== nfserr_stale_clientid
) {
4453 if (cstate
->session
)
4454 return nfserr_bad_stateid
;
4455 return nfserr_stale_stateid
;
4459 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
4461 return nfserr_bad_stateid
;
4466 * Checks for stateid operations
4469 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
4470 stateid_t
*stateid
, int flags
, struct file
**filpp
)
4472 struct nfs4_stid
*s
;
4473 struct nfs4_ol_stateid
*stp
= NULL
;
4474 struct nfs4_delegation
*dp
= NULL
;
4475 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4476 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
4477 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4478 struct file
*file
= NULL
;
4484 if (grace_disallows_io(net
, ino
))
4485 return nfserr_grace
;
4487 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4488 return check_special_stateids(net
, current_fh
, stateid
, flags
);
4490 status
= nfsd4_lookup_stateid(cstate
, stateid
,
4491 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
4495 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
4498 switch (s
->sc_type
) {
4499 case NFS4_DELEG_STID
:
4500 dp
= delegstateid(s
);
4501 status
= nfs4_check_delegmode(dp
, flags
);
4505 file
= dp
->dl_stid
.sc_file
->fi_deleg_file
;
4508 status
= nfserr_serverfault
;
4514 case NFS4_OPEN_STID
:
4515 case NFS4_LOCK_STID
:
4516 stp
= openlockstateid(s
);
4517 status
= nfs4_check_fh(current_fh
, stp
);
4520 if (stp
->st_stateowner
->so_is_open_owner
4521 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4523 status
= nfs4_check_openmode(stp
, flags
);
4527 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
4529 if (flags
& RD_STATE
)
4530 file
= find_readable_file(fp
);
4532 file
= find_writeable_file(fp
);
4536 status
= nfserr_bad_stateid
;
4548 * Test if the stateid is valid
4551 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4552 struct nfsd4_test_stateid
*test_stateid
)
4554 struct nfsd4_test_stateid_id
*stateid
;
4555 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4557 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
4558 stateid
->ts_id_status
=
4559 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
4565 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4566 struct nfsd4_free_stateid
*free_stateid
)
4568 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
4569 struct nfs4_stid
*s
;
4570 struct nfs4_delegation
*dp
;
4571 struct nfs4_ol_stateid
*stp
;
4572 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4573 __be32 ret
= nfserr_bad_stateid
;
4575 spin_lock(&cl
->cl_lock
);
4576 s
= find_stateid_locked(cl
, stateid
);
4579 switch (s
->sc_type
) {
4580 case NFS4_DELEG_STID
:
4581 ret
= nfserr_locks_held
;
4583 case NFS4_OPEN_STID
:
4584 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4587 ret
= nfserr_locks_held
;
4589 case NFS4_LOCK_STID
:
4590 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4593 stp
= openlockstateid(s
);
4594 ret
= nfserr_locks_held
;
4595 if (check_for_locks(stp
->st_stid
.sc_file
,
4596 lockowner(stp
->st_stateowner
)))
4598 unhash_lock_stateid(stp
);
4599 spin_unlock(&cl
->cl_lock
);
4603 case NFS4_REVOKED_DELEG_STID
:
4604 dp
= delegstateid(s
);
4605 list_del_init(&dp
->dl_recall_lru
);
4606 spin_unlock(&cl
->cl_lock
);
4610 /* Default falls through and returns nfserr_bad_stateid */
4613 spin_unlock(&cl
->cl_lock
);
4621 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
4622 RD_STATE
: WR_STATE
;
4625 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
4627 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4628 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
4631 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
4634 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
4635 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
4637 * "Closed" stateid's exist *only* to return
4638 * nfserr_replay_me from the previous step, and
4639 * revoked delegations are kept only for free_stateid.
4641 return nfserr_bad_stateid
;
4642 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4645 return nfs4_check_fh(current_fh
, stp
);
4649 * Checks for sequence id mutating operations.
4652 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4653 stateid_t
*stateid
, char typemask
,
4654 struct nfs4_ol_stateid
**stpp
,
4655 struct nfsd_net
*nn
)
4658 struct nfs4_stid
*s
;
4659 struct nfs4_ol_stateid
*stp
= NULL
;
4661 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
4662 seqid
, STATEID_VAL(stateid
));
4665 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
4668 stp
= openlockstateid(s
);
4669 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
4671 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
4675 nfs4_put_stid(&stp
->st_stid
);
4679 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4680 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
4683 struct nfs4_openowner
*oo
;
4684 struct nfs4_ol_stateid
*stp
;
4686 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
4687 NFS4_OPEN_STID
, &stp
, nn
);
4690 oo
= openowner(stp
->st_stateowner
);
4691 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
4692 nfs4_put_stid(&stp
->st_stid
);
4693 return nfserr_bad_stateid
;
4700 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4701 struct nfsd4_open_confirm
*oc
)
4704 struct nfs4_openowner
*oo
;
4705 struct nfs4_ol_stateid
*stp
;
4706 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4708 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4709 cstate
->current_fh
.fh_dentry
);
4711 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
4715 status
= nfs4_preprocess_seqid_op(cstate
,
4716 oc
->oc_seqid
, &oc
->oc_req_stateid
,
4717 NFS4_OPEN_STID
, &stp
, nn
);
4720 oo
= openowner(stp
->st_stateowner
);
4721 status
= nfserr_bad_stateid
;
4722 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
4724 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
4725 update_stateid(&stp
->st_stid
.sc_stateid
);
4726 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4727 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
4728 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4730 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
4733 nfs4_put_stid(&stp
->st_stid
);
4735 nfsd4_bump_seqid(cstate
, status
);
4739 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
4741 if (!test_access(access
, stp
))
4743 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
4744 clear_access(access
, stp
);
4747 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
4749 switch (to_access
) {
4750 case NFS4_SHARE_ACCESS_READ
:
4751 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
4752 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4754 case NFS4_SHARE_ACCESS_WRITE
:
4755 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
4756 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4758 case NFS4_SHARE_ACCESS_BOTH
:
4766 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
4767 struct nfsd4_compound_state
*cstate
,
4768 struct nfsd4_open_downgrade
*od
)
4771 struct nfs4_ol_stateid
*stp
;
4772 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4774 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4775 cstate
->current_fh
.fh_dentry
);
4777 /* We don't yet support WANT bits: */
4778 if (od
->od_deleg_want
)
4779 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
4782 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
4783 &od
->od_stateid
, &stp
, nn
);
4786 status
= nfserr_inval
;
4787 if (!test_access(od
->od_share_access
, stp
)) {
4788 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
4789 stp
->st_access_bmap
, od
->od_share_access
);
4792 if (!test_deny(od
->od_share_deny
, stp
)) {
4793 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
4794 stp
->st_deny_bmap
, od
->od_share_deny
);
4797 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
4799 reset_union_bmap_deny(od
->od_share_deny
, stp
);
4801 update_stateid(&stp
->st_stid
.sc_stateid
);
4802 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4805 nfs4_put_stid(&stp
->st_stid
);
4807 nfsd4_bump_seqid(cstate
, status
);
4811 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4813 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
4814 LIST_HEAD(reaplist
);
4816 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4817 spin_lock(&clp
->cl_lock
);
4818 unhash_open_stateid(s
, &reaplist
);
4820 if (clp
->cl_minorversion
) {
4821 put_ol_stateid_locked(s
, &reaplist
);
4822 spin_unlock(&clp
->cl_lock
);
4823 free_ol_stateid_reaplist(&reaplist
);
4825 spin_unlock(&clp
->cl_lock
);
4826 free_ol_stateid_reaplist(&reaplist
);
4827 move_to_close_lru(s
, clp
->net
);
4832 * nfs4_unlock_state() called after encode
4835 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4836 struct nfsd4_close
*close
)
4839 struct nfs4_ol_stateid
*stp
;
4840 struct net
*net
= SVC_NET(rqstp
);
4841 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4843 dprintk("NFSD: nfsd4_close on file %pd\n",
4844 cstate
->current_fh
.fh_dentry
);
4846 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4848 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4850 nfsd4_bump_seqid(cstate
, status
);
4853 update_stateid(&stp
->st_stid
.sc_stateid
);
4854 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4856 nfsd4_close_open_stateid(stp
);
4858 /* put reference from nfs4_preprocess_seqid_op */
4859 nfs4_put_stid(&stp
->st_stid
);
4865 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4866 struct nfsd4_delegreturn
*dr
)
4868 struct nfs4_delegation
*dp
;
4869 stateid_t
*stateid
= &dr
->dr_stateid
;
4870 struct nfs4_stid
*s
;
4872 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4874 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4877 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
4880 dp
= delegstateid(s
);
4881 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4885 destroy_delegation(dp
);
4887 nfs4_put_stid(&dp
->dl_stid
);
4893 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4896 end_offset(u64 start
, u64 len
)
4901 return end
>= start
? end
: NFS4_MAX_UINT64
;
4904 /* last octet in a range */
4906 last_byte_offset(u64 start
, u64 len
)
4912 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4916 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4917 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4918 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4919 * locking, this prevents us from being completely protocol-compliant. The
4920 * real solution to this problem is to start using unsigned file offsets in
4921 * the VFS, but this is a very deep change!
4924 nfs4_transform_lock_offset(struct file_lock
*lock
)
4926 if (lock
->fl_start
< 0)
4927 lock
->fl_start
= OFFSET_MAX
;
4928 if (lock
->fl_end
< 0)
4929 lock
->fl_end
= OFFSET_MAX
;
4932 static void nfsd4_fl_get_owner(struct file_lock
*dst
, struct file_lock
*src
)
4934 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)src
->fl_owner
;
4935 dst
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lo
->lo_owner
));
4938 static void nfsd4_fl_put_owner(struct file_lock
*fl
)
4940 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)fl
->fl_owner
;
4943 nfs4_put_stateowner(&lo
->lo_owner
);
4944 fl
->fl_owner
= NULL
;
4948 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4949 .lm_get_owner
= nfsd4_fl_get_owner
,
4950 .lm_put_owner
= nfsd4_fl_put_owner
,
4954 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4956 struct nfs4_lockowner
*lo
;
4958 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4959 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4960 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4961 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4962 if (!deny
->ld_owner
.data
)
4963 /* We just don't care that much */
4965 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4966 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4969 deny
->ld_owner
.len
= 0;
4970 deny
->ld_owner
.data
= NULL
;
4971 deny
->ld_clientid
.cl_boot
= 0;
4972 deny
->ld_clientid
.cl_id
= 0;
4974 deny
->ld_start
= fl
->fl_start
;
4975 deny
->ld_length
= NFS4_MAX_UINT64
;
4976 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4977 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4978 deny
->ld_type
= NFS4_READ_LT
;
4979 if (fl
->fl_type
!= F_RDLCK
)
4980 deny
->ld_type
= NFS4_WRITE_LT
;
4983 static struct nfs4_lockowner
*
4984 find_lockowner_str_locked(clientid_t
*clid
, struct xdr_netobj
*owner
,
4985 struct nfs4_client
*clp
)
4987 unsigned int strhashval
= ownerstr_hashval(owner
);
4988 struct nfs4_stateowner
*so
;
4990 lockdep_assert_held(&clp
->cl_lock
);
4992 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
4994 if (so
->so_is_open_owner
)
4996 if (same_owner_str(so
, owner
))
4997 return lockowner(nfs4_get_stateowner(so
));
5002 static struct nfs4_lockowner
*
5003 find_lockowner_str(clientid_t
*clid
, struct xdr_netobj
*owner
,
5004 struct nfs4_client
*clp
)
5006 struct nfs4_lockowner
*lo
;
5008 spin_lock(&clp
->cl_lock
);
5009 lo
= find_lockowner_str_locked(clid
, owner
, clp
);
5010 spin_unlock(&clp
->cl_lock
);
5014 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
5016 unhash_lockowner_locked(lockowner(sop
));
5019 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
5021 struct nfs4_lockowner
*lo
= lockowner(sop
);
5023 kmem_cache_free(lockowner_slab
, lo
);
5026 static const struct nfs4_stateowner_operations lockowner_ops
= {
5027 .so_unhash
= nfs4_unhash_lockowner
,
5028 .so_free
= nfs4_free_lockowner
,
5032 * Alloc a lock owner structure.
5033 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5036 * strhashval = ownerstr_hashval
5038 static struct nfs4_lockowner
*
5039 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
5040 struct nfs4_ol_stateid
*open_stp
,
5041 struct nfsd4_lock
*lock
)
5043 struct nfs4_lockowner
*lo
, *ret
;
5045 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
5048 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
5049 lo
->lo_owner
.so_is_open_owner
= 0;
5050 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
5051 lo
->lo_owner
.so_ops
= &lockowner_ops
;
5052 spin_lock(&clp
->cl_lock
);
5053 ret
= find_lockowner_str_locked(&clp
->cl_clientid
,
5054 &lock
->lk_new_owner
, clp
);
5056 list_add(&lo
->lo_owner
.so_strhash
,
5057 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5060 nfs4_free_lockowner(&lo
->lo_owner
);
5061 spin_unlock(&clp
->cl_lock
);
5066 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5067 struct nfs4_file
*fp
, struct inode
*inode
,
5068 struct nfs4_ol_stateid
*open_stp
)
5070 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5072 lockdep_assert_held(&clp
->cl_lock
);
5074 atomic_inc(&stp
->st_stid
.sc_count
);
5075 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5076 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5078 stp
->st_stid
.sc_file
= fp
;
5079 stp
->st_stid
.sc_free
= nfs4_free_lock_stateid
;
5080 stp
->st_access_bmap
= 0;
5081 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5082 stp
->st_openstp
= open_stp
;
5083 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5084 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5085 spin_lock(&fp
->fi_lock
);
5086 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5087 spin_unlock(&fp
->fi_lock
);
5090 static struct nfs4_ol_stateid
*
5091 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5093 struct nfs4_ol_stateid
*lst
;
5094 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5096 lockdep_assert_held(&clp
->cl_lock
);
5098 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5099 if (lst
->st_stid
.sc_file
== fp
) {
5100 atomic_inc(&lst
->st_stid
.sc_count
);
5107 static struct nfs4_ol_stateid
*
5108 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5109 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5112 struct nfs4_stid
*ns
= NULL
;
5113 struct nfs4_ol_stateid
*lst
;
5114 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5115 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5117 spin_lock(&clp
->cl_lock
);
5118 lst
= find_lock_stateid(lo
, fi
);
5120 spin_unlock(&clp
->cl_lock
);
5121 ns
= nfs4_alloc_stid(clp
, stateid_slab
);
5125 spin_lock(&clp
->cl_lock
);
5126 lst
= find_lock_stateid(lo
, fi
);
5128 lst
= openlockstateid(ns
);
5129 init_lock_stateid(lst
, lo
, fi
, inode
, ost
);
5134 spin_unlock(&clp
->cl_lock
);
5141 check_lock_length(u64 offset
, u64 length
)
5143 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5144 LOFF_OVERFLOW(offset
, length
)));
5147 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5149 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5151 lockdep_assert_held(&fp
->fi_lock
);
5153 if (test_access(access
, lock_stp
))
5155 __nfs4_file_get_access(fp
, access
);
5156 set_access(access
, lock_stp
);
5160 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5161 struct nfs4_ol_stateid
*ost
,
5162 struct nfsd4_lock
*lock
,
5163 struct nfs4_ol_stateid
**lst
, bool *new)
5166 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5167 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5168 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5169 struct inode
*inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
5170 struct nfs4_lockowner
*lo
;
5171 unsigned int strhashval
;
5173 lo
= find_lockowner_str(&cl
->cl_clientid
, &lock
->v
.new.owner
, cl
);
5175 strhashval
= ownerstr_hashval(&lock
->v
.new.owner
);
5176 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5178 return nfserr_jukebox
;
5180 /* with an existing lockowner, seqids must be the same */
5181 status
= nfserr_bad_seqid
;
5182 if (!cstate
->minorversion
&&
5183 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5187 *lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5189 status
= nfserr_jukebox
;
5194 nfs4_put_stateowner(&lo
->lo_owner
);
5202 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5203 struct nfsd4_lock
*lock
)
5205 struct nfs4_openowner
*open_sop
= NULL
;
5206 struct nfs4_lockowner
*lock_sop
= NULL
;
5207 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5208 struct nfs4_ol_stateid
*open_stp
= NULL
;
5209 struct nfs4_file
*fp
;
5210 struct file
*filp
= NULL
;
5211 struct file_lock
*file_lock
= NULL
;
5212 struct file_lock
*conflock
= NULL
;
5217 struct net
*net
= SVC_NET(rqstp
);
5218 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5220 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5221 (long long) lock
->lk_offset
,
5222 (long long) lock
->lk_length
);
5224 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5225 return nfserr_inval
;
5227 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5228 S_IFREG
, NFSD_MAY_LOCK
))) {
5229 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5233 if (lock
->lk_is_new
) {
5234 if (nfsd4_has_session(cstate
))
5235 /* See rfc 5661 18.10.3: given clientid is ignored: */
5236 memcpy(&lock
->v
.new.clientid
,
5237 &cstate
->session
->se_client
->cl_clientid
,
5238 sizeof(clientid_t
));
5240 status
= nfserr_stale_clientid
;
5241 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5244 /* validate and update open stateid and open seqid */
5245 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5246 lock
->lk_new_open_seqid
,
5247 &lock
->lk_new_open_stateid
,
5251 open_sop
= openowner(open_stp
->st_stateowner
);
5252 status
= nfserr_bad_stateid
;
5253 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5254 &lock
->v
.new.clientid
))
5256 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5259 status
= nfs4_preprocess_seqid_op(cstate
,
5260 lock
->lk_old_lock_seqid
,
5261 &lock
->lk_old_lock_stateid
,
5262 NFS4_LOCK_STID
, &lock_stp
, nn
);
5266 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5268 lkflg
= setlkflg(lock
->lk_type
);
5269 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5273 status
= nfserr_grace
;
5274 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5276 status
= nfserr_no_grace
;
5277 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5280 file_lock
= locks_alloc_lock();
5282 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5283 status
= nfserr_jukebox
;
5287 fp
= lock_stp
->st_stid
.sc_file
;
5288 switch (lock
->lk_type
) {
5291 spin_lock(&fp
->fi_lock
);
5292 filp
= find_readable_file_locked(fp
);
5294 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5295 spin_unlock(&fp
->fi_lock
);
5296 file_lock
->fl_type
= F_RDLCK
;
5299 case NFS4_WRITEW_LT
:
5300 spin_lock(&fp
->fi_lock
);
5301 filp
= find_writeable_file_locked(fp
);
5303 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
5304 spin_unlock(&fp
->fi_lock
);
5305 file_lock
->fl_type
= F_WRLCK
;
5308 status
= nfserr_inval
;
5312 status
= nfserr_openmode
;
5316 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
5317 file_lock
->fl_pid
= current
->tgid
;
5318 file_lock
->fl_file
= filp
;
5319 file_lock
->fl_flags
= FL_POSIX
;
5320 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5321 file_lock
->fl_start
= lock
->lk_offset
;
5322 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
5323 nfs4_transform_lock_offset(file_lock
);
5325 conflock
= locks_alloc_lock();
5327 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5328 status
= nfserr_jukebox
;
5332 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
5334 case 0: /* success! */
5335 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
5336 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
5340 case (EAGAIN
): /* conflock holds conflicting lock */
5341 status
= nfserr_denied
;
5342 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5343 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
5346 status
= nfserr_deadlock
;
5349 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
5350 status
= nfserrno(err
);
5357 /* Bump seqid manually if the 4.0 replay owner is openowner */
5358 if (cstate
->replay_owner
&&
5359 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
5360 seqid_mutating_err(ntohl(status
)))
5361 lock_sop
->lo_owner
.so_seqid
++;
5364 * If this is a new, never-before-used stateid, and we are
5365 * returning an error, then just go ahead and release it.
5368 release_lock_stateid(lock_stp
);
5370 nfs4_put_stid(&lock_stp
->st_stid
);
5373 nfs4_put_stid(&open_stp
->st_stid
);
5374 nfsd4_bump_seqid(cstate
, status
);
5376 locks_free_lock(file_lock
);
5378 locks_free_lock(conflock
);
5383 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5384 * so we do a temporary open here just to get an open file to pass to
5385 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5388 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
5391 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
5393 err
= nfserrno(vfs_test_lock(file
, lock
));
5403 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5404 struct nfsd4_lockt
*lockt
)
5406 struct file_lock
*file_lock
= NULL
;
5407 struct nfs4_lockowner
*lo
= NULL
;
5409 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5411 if (locks_in_grace(SVC_NET(rqstp
)))
5412 return nfserr_grace
;
5414 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
5415 return nfserr_inval
;
5417 if (!nfsd4_has_session(cstate
)) {
5418 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
5423 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5426 file_lock
= locks_alloc_lock();
5428 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5429 status
= nfserr_jukebox
;
5433 switch (lockt
->lt_type
) {
5436 file_lock
->fl_type
= F_RDLCK
;
5439 case NFS4_WRITEW_LT
:
5440 file_lock
->fl_type
= F_WRLCK
;
5443 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
5444 status
= nfserr_inval
;
5448 lo
= find_lockowner_str(&lockt
->lt_clientid
, &lockt
->lt_owner
,
5451 file_lock
->fl_owner
= (fl_owner_t
)lo
;
5452 file_lock
->fl_pid
= current
->tgid
;
5453 file_lock
->fl_flags
= FL_POSIX
;
5455 file_lock
->fl_start
= lockt
->lt_offset
;
5456 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
5458 nfs4_transform_lock_offset(file_lock
);
5460 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
5464 if (file_lock
->fl_type
!= F_UNLCK
) {
5465 status
= nfserr_denied
;
5466 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
5470 nfs4_put_stateowner(&lo
->lo_owner
);
5472 locks_free_lock(file_lock
);
5477 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5478 struct nfsd4_locku
*locku
)
5480 struct nfs4_ol_stateid
*stp
;
5481 struct file
*filp
= NULL
;
5482 struct file_lock
*file_lock
= NULL
;
5485 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5487 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5488 (long long) locku
->lu_offset
,
5489 (long long) locku
->lu_length
);
5491 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
5492 return nfserr_inval
;
5494 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
5495 &locku
->lu_stateid
, NFS4_LOCK_STID
,
5499 filp
= find_any_file(stp
->st_stid
.sc_file
);
5501 status
= nfserr_lock_range
;
5504 file_lock
= locks_alloc_lock();
5506 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5507 status
= nfserr_jukebox
;
5511 file_lock
->fl_type
= F_UNLCK
;
5512 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
5513 file_lock
->fl_pid
= current
->tgid
;
5514 file_lock
->fl_file
= filp
;
5515 file_lock
->fl_flags
= FL_POSIX
;
5516 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5517 file_lock
->fl_start
= locku
->lu_offset
;
5519 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
5521 nfs4_transform_lock_offset(file_lock
);
5523 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
5525 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
5528 update_stateid(&stp
->st_stid
.sc_stateid
);
5529 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
5533 nfs4_put_stid(&stp
->st_stid
);
5535 nfsd4_bump_seqid(cstate
, status
);
5537 locks_free_lock(file_lock
);
5541 status
= nfserrno(err
);
5547 * true: locks held by lockowner
5548 * false: no locks held by lockowner
5551 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
5553 struct file_lock
**flpp
;
5555 struct file
*filp
= find_any_file(fp
);
5556 struct inode
*inode
;
5559 /* Any valid lock stateid should have some sort of access */
5564 inode
= file_inode(filp
);
5566 spin_lock(&inode
->i_lock
);
5567 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
5568 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
5573 spin_unlock(&inode
->i_lock
);
5579 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
5580 struct nfsd4_compound_state
*cstate
,
5581 struct nfsd4_release_lockowner
*rlockowner
)
5583 clientid_t
*clid
= &rlockowner
->rl_clientid
;
5584 struct nfs4_stateowner
*sop
;
5585 struct nfs4_lockowner
*lo
= NULL
;
5586 struct nfs4_ol_stateid
*stp
;
5587 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
5588 unsigned int hashval
= ownerstr_hashval(owner
);
5590 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5591 struct nfs4_client
*clp
;
5593 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5594 clid
->cl_boot
, clid
->cl_id
);
5596 status
= lookup_clientid(clid
, cstate
, nn
);
5601 /* Find the matching lock stateowner */
5602 spin_lock(&clp
->cl_lock
);
5603 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
5606 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
5609 /* see if there are still any locks associated with it */
5610 lo
= lockowner(sop
);
5611 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
5612 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
5613 status
= nfserr_locks_held
;
5614 spin_unlock(&clp
->cl_lock
);
5619 nfs4_get_stateowner(sop
);
5622 spin_unlock(&clp
->cl_lock
);
5624 release_lockowner(lo
);
5628 static inline struct nfs4_client_reclaim
*
5631 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
5635 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
5637 struct nfs4_client_reclaim
*crp
;
5639 crp
= nfsd4_find_reclaim_client(name
, nn
);
5640 return (crp
&& crp
->cr_clp
);
5644 * failure => all reset bets are off, nfserr_no_grace...
5646 struct nfs4_client_reclaim
*
5647 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
5649 unsigned int strhashval
;
5650 struct nfs4_client_reclaim
*crp
;
5652 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
5653 crp
= alloc_reclaim();
5655 strhashval
= clientstr_hashval(name
);
5656 INIT_LIST_HEAD(&crp
->cr_strhash
);
5657 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
5658 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
5660 nn
->reclaim_str_hashtbl_size
++;
5666 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
5668 list_del(&crp
->cr_strhash
);
5670 nn
->reclaim_str_hashtbl_size
--;
5674 nfs4_release_reclaim(struct nfsd_net
*nn
)
5676 struct nfs4_client_reclaim
*crp
= NULL
;
5679 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5680 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
5681 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
5682 struct nfs4_client_reclaim
, cr_strhash
);
5683 nfs4_remove_reclaim_record(crp
, nn
);
5686 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
5690 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
5691 struct nfs4_client_reclaim
*
5692 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
5694 unsigned int strhashval
;
5695 struct nfs4_client_reclaim
*crp
= NULL
;
5697 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
5699 strhashval
= clientstr_hashval(recdir
);
5700 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
5701 if (same_name(crp
->cr_recdir
, recdir
)) {
5709 * Called from OPEN. Look for clientid in reclaim list.
5712 nfs4_check_open_reclaim(clientid_t
*clid
,
5713 struct nfsd4_compound_state
*cstate
,
5714 struct nfsd_net
*nn
)
5718 /* find clientid in conf_id_hashtbl */
5719 status
= lookup_clientid(clid
, cstate
, nn
);
5721 return nfserr_reclaim_bad
;
5723 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
, &cstate
->clp
->cl_flags
))
5724 return nfserr_no_grace
;
5726 if (nfsd4_client_record_check(cstate
->clp
))
5727 return nfserr_reclaim_bad
;
5732 #ifdef CONFIG_NFSD_FAULT_INJECTION
5734 put_client(struct nfs4_client
*clp
)
5736 atomic_dec(&clp
->cl_refcount
);
5739 static struct nfs4_client
*
5740 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5742 struct nfs4_client
*clp
;
5743 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5746 if (!nfsd_netns_ready(nn
))
5749 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5750 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5757 nfsd_inject_print_clients(void)
5759 struct nfs4_client
*clp
;
5761 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5763 char buf
[INET6_ADDRSTRLEN
];
5765 if (!nfsd_netns_ready(nn
))
5768 spin_lock(&nn
->client_lock
);
5769 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5770 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5771 pr_info("NFS Client: %s\n", buf
);
5774 spin_unlock(&nn
->client_lock
);
5780 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5783 struct nfs4_client
*clp
;
5784 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5787 if (!nfsd_netns_ready(nn
))
5790 spin_lock(&nn
->client_lock
);
5791 clp
= nfsd_find_client(addr
, addr_size
);
5793 if (mark_client_expired_locked(clp
) == nfs_ok
)
5798 spin_unlock(&nn
->client_lock
);
5807 nfsd_inject_forget_clients(u64 max
)
5810 struct nfs4_client
*clp
, *next
;
5811 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5813 LIST_HEAD(reaplist
);
5815 if (!nfsd_netns_ready(nn
))
5818 spin_lock(&nn
->client_lock
);
5819 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
5820 if (mark_client_expired_locked(clp
) == nfs_ok
) {
5821 list_add(&clp
->cl_lru
, &reaplist
);
5822 if (max
!= 0 && ++count
>= max
)
5826 spin_unlock(&nn
->client_lock
);
5828 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
5834 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
5837 char buf
[INET6_ADDRSTRLEN
];
5838 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5839 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
5843 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
5844 struct list_head
*collect
)
5846 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
5847 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5853 lockdep_assert_held(&nn
->client_lock
);
5854 atomic_inc(&clp
->cl_refcount
);
5855 list_add(&lst
->st_locks
, collect
);
5858 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
5859 struct list_head
*collect
,
5860 void (*func
)(struct nfs4_ol_stateid
*))
5862 struct nfs4_openowner
*oop
;
5863 struct nfs4_ol_stateid
*stp
, *st_next
;
5864 struct nfs4_ol_stateid
*lst
, *lst_next
;
5867 spin_lock(&clp
->cl_lock
);
5868 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
5869 list_for_each_entry_safe(stp
, st_next
,
5870 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
5871 list_for_each_entry_safe(lst
, lst_next
,
5872 &stp
->st_locks
, st_locks
) {
5875 nfsd_inject_add_lock_to_list(lst
,
5880 * Despite the fact that these functions deal
5881 * with 64-bit integers for "count", we must
5882 * ensure that it doesn't blow up the
5883 * clp->cl_refcount. Throw a warning if we
5884 * start to approach INT_MAX here.
5886 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
5893 spin_unlock(&clp
->cl_lock
);
5899 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
5902 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
5906 nfsd_print_client_locks(struct nfs4_client
*clp
)
5908 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
5909 nfsd_print_count(clp
, count
, "locked files");
5914 nfsd_inject_print_locks(void)
5916 struct nfs4_client
*clp
;
5918 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5921 if (!nfsd_netns_ready(nn
))
5924 spin_lock(&nn
->client_lock
);
5925 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
5926 count
+= nfsd_print_client_locks(clp
);
5927 spin_unlock(&nn
->client_lock
);
5933 nfsd_reap_locks(struct list_head
*reaplist
)
5935 struct nfs4_client
*clp
;
5936 struct nfs4_ol_stateid
*stp
, *next
;
5938 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
5939 list_del_init(&stp
->st_locks
);
5940 clp
= stp
->st_stid
.sc_client
;
5941 nfs4_put_stid(&stp
->st_stid
);
5947 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
5949 unsigned int count
= 0;
5950 struct nfs4_client
*clp
;
5951 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5953 LIST_HEAD(reaplist
);
5955 if (!nfsd_netns_ready(nn
))
5958 spin_lock(&nn
->client_lock
);
5959 clp
= nfsd_find_client(addr
, addr_size
);
5961 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
5962 spin_unlock(&nn
->client_lock
);
5963 nfsd_reap_locks(&reaplist
);
5968 nfsd_inject_forget_locks(u64 max
)
5971 struct nfs4_client
*clp
;
5972 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
5974 LIST_HEAD(reaplist
);
5976 if (!nfsd_netns_ready(nn
))
5979 spin_lock(&nn
->client_lock
);
5980 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5981 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
5982 if (max
!= 0 && count
>= max
)
5985 spin_unlock(&nn
->client_lock
);
5986 nfsd_reap_locks(&reaplist
);
5991 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
5992 struct list_head
*collect
,
5993 void (*func
)(struct nfs4_openowner
*))
5995 struct nfs4_openowner
*oop
, *next
;
5996 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6000 lockdep_assert_held(&nn
->client_lock
);
6002 spin_lock(&clp
->cl_lock
);
6003 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
6007 atomic_inc(&clp
->cl_refcount
);
6008 list_add(&oop
->oo_perclient
, collect
);
6013 * Despite the fact that these functions deal with
6014 * 64-bit integers for "count", we must ensure that
6015 * it doesn't blow up the clp->cl_refcount. Throw a
6016 * warning if we start to approach INT_MAX here.
6018 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6022 spin_unlock(&clp
->cl_lock
);
6028 nfsd_print_client_openowners(struct nfs4_client
*clp
)
6030 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
6032 nfsd_print_count(clp
, count
, "openowners");
6037 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
6038 struct list_head
*collect
, u64 max
)
6040 return nfsd_foreach_client_openowner(clp
, max
, collect
,
6041 unhash_openowner_locked
);
6045 nfsd_inject_print_openowners(void)
6047 struct nfs4_client
*clp
;
6049 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6052 if (!nfsd_netns_ready(nn
))
6055 spin_lock(&nn
->client_lock
);
6056 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6057 count
+= nfsd_print_client_openowners(clp
);
6058 spin_unlock(&nn
->client_lock
);
6064 nfsd_reap_openowners(struct list_head
*reaplist
)
6066 struct nfs4_client
*clp
;
6067 struct nfs4_openowner
*oop
, *next
;
6069 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6070 list_del_init(&oop
->oo_perclient
);
6071 clp
= oop
->oo_owner
.so_client
;
6072 release_openowner(oop
);
6078 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6081 unsigned int count
= 0;
6082 struct nfs4_client
*clp
;
6083 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6085 LIST_HEAD(reaplist
);
6087 if (!nfsd_netns_ready(nn
))
6090 spin_lock(&nn
->client_lock
);
6091 clp
= nfsd_find_client(addr
, addr_size
);
6093 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6094 spin_unlock(&nn
->client_lock
);
6095 nfsd_reap_openowners(&reaplist
);
6100 nfsd_inject_forget_openowners(u64 max
)
6103 struct nfs4_client
*clp
;
6104 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6106 LIST_HEAD(reaplist
);
6108 if (!nfsd_netns_ready(nn
))
6111 spin_lock(&nn
->client_lock
);
6112 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6113 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6115 if (max
!= 0 && count
>= max
)
6118 spin_unlock(&nn
->client_lock
);
6119 nfsd_reap_openowners(&reaplist
);
6123 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6124 struct list_head
*victims
)
6126 struct nfs4_delegation
*dp
, *next
;
6127 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6131 lockdep_assert_held(&nn
->client_lock
);
6133 spin_lock(&state_lock
);
6134 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6137 * It's not safe to mess with delegations that have a
6138 * non-zero dl_time. They might have already been broken
6139 * and could be processed by the laundromat outside of
6140 * the state_lock. Just leave them be.
6142 if (dp
->dl_time
!= 0)
6145 atomic_inc(&clp
->cl_refcount
);
6146 unhash_delegation_locked(dp
);
6147 list_add(&dp
->dl_recall_lru
, victims
);
6151 * Despite the fact that these functions deal with
6152 * 64-bit integers for "count", we must ensure that
6153 * it doesn't blow up the clp->cl_refcount. Throw a
6154 * warning if we start to approach INT_MAX here.
6156 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6160 spin_unlock(&state_lock
);
6165 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6167 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6169 nfsd_print_count(clp
, count
, "delegations");
6174 nfsd_inject_print_delegations(void)
6176 struct nfs4_client
*clp
;
6178 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6181 if (!nfsd_netns_ready(nn
))
6184 spin_lock(&nn
->client_lock
);
6185 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6186 count
+= nfsd_print_client_delegations(clp
);
6187 spin_unlock(&nn
->client_lock
);
6193 nfsd_forget_delegations(struct list_head
*reaplist
)
6195 struct nfs4_client
*clp
;
6196 struct nfs4_delegation
*dp
, *next
;
6198 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6199 list_del_init(&dp
->dl_recall_lru
);
6200 clp
= dp
->dl_stid
.sc_client
;
6201 revoke_delegation(dp
);
6207 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6211 struct nfs4_client
*clp
;
6212 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6214 LIST_HEAD(reaplist
);
6216 if (!nfsd_netns_ready(nn
))
6219 spin_lock(&nn
->client_lock
);
6220 clp
= nfsd_find_client(addr
, addr_size
);
6222 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6223 spin_unlock(&nn
->client_lock
);
6225 nfsd_forget_delegations(&reaplist
);
6230 nfsd_inject_forget_delegations(u64 max
)
6233 struct nfs4_client
*clp
;
6234 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6236 LIST_HEAD(reaplist
);
6238 if (!nfsd_netns_ready(nn
))
6241 spin_lock(&nn
->client_lock
);
6242 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6243 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6244 if (max
!= 0 && count
>= max
)
6247 spin_unlock(&nn
->client_lock
);
6248 nfsd_forget_delegations(&reaplist
);
6253 nfsd_recall_delegations(struct list_head
*reaplist
)
6255 struct nfs4_client
*clp
;
6256 struct nfs4_delegation
*dp
, *next
;
6258 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6259 list_del_init(&dp
->dl_recall_lru
);
6260 clp
= dp
->dl_stid
.sc_client
;
6262 * We skipped all entries that had a zero dl_time before,
6263 * so we can now reset the dl_time back to 0. If a delegation
6264 * break comes in now, then it won't make any difference since
6265 * we're recalling it either way.
6267 spin_lock(&state_lock
);
6269 spin_unlock(&state_lock
);
6270 nfsd_break_one_deleg(dp
);
6276 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
6280 struct nfs4_client
*clp
;
6281 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6283 LIST_HEAD(reaplist
);
6285 if (!nfsd_netns_ready(nn
))
6288 spin_lock(&nn
->client_lock
);
6289 clp
= nfsd_find_client(addr
, addr_size
);
6291 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6292 spin_unlock(&nn
->client_lock
);
6294 nfsd_recall_delegations(&reaplist
);
6299 nfsd_inject_recall_delegations(u64 max
)
6302 struct nfs4_client
*clp
, *next
;
6303 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6305 LIST_HEAD(reaplist
);
6307 if (!nfsd_netns_ready(nn
))
6310 spin_lock(&nn
->client_lock
);
6311 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6312 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6313 if (max
!= 0 && ++count
>= max
)
6316 spin_unlock(&nn
->client_lock
);
6317 nfsd_recall_delegations(&reaplist
);
6320 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6323 * Since the lifetime of a delegation isn't limited to that of an open, a
6324 * client may quite reasonably hang on to a delegation as long as it has
6325 * the inode cached. This becomes an obvious problem the first time a
6326 * client's inode cache approaches the size of the server's total memory.
6328 * For now we avoid this problem by imposing a hard limit on the number
6329 * of delegations, which varies according to the server's memory size.
6332 set_max_delegations(void)
6335 * Allow at most 4 delegations per megabyte of RAM. Quick
6336 * estimates suggest that in the worst case (where every delegation
6337 * is for a different inode), a delegation could take about 1.5K,
6338 * giving a worst case usage of about 6% of memory.
6340 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
6343 static int nfs4_state_create_net(struct net
*net
)
6345 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6348 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6349 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6350 if (!nn
->conf_id_hashtbl
)
6352 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6353 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6354 if (!nn
->unconf_id_hashtbl
)
6356 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
6357 SESSION_HASH_SIZE
, GFP_KERNEL
);
6358 if (!nn
->sessionid_hashtbl
)
6361 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6362 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
6363 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
6365 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
6366 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
6367 nn
->conf_name_tree
= RB_ROOT
;
6368 nn
->unconf_name_tree
= RB_ROOT
;
6369 INIT_LIST_HEAD(&nn
->client_lru
);
6370 INIT_LIST_HEAD(&nn
->close_lru
);
6371 INIT_LIST_HEAD(&nn
->del_recall_lru
);
6372 spin_lock_init(&nn
->client_lock
);
6374 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
6380 kfree(nn
->unconf_id_hashtbl
);
6382 kfree(nn
->conf_id_hashtbl
);
6388 nfs4_state_destroy_net(struct net
*net
)
6391 struct nfs4_client
*clp
= NULL
;
6392 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6394 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6395 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
6396 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6397 destroy_client(clp
);
6401 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6402 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
6403 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6404 destroy_client(clp
);
6408 kfree(nn
->sessionid_hashtbl
);
6409 kfree(nn
->unconf_id_hashtbl
);
6410 kfree(nn
->conf_id_hashtbl
);
6415 nfs4_state_start_net(struct net
*net
)
6417 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6420 ret
= nfs4_state_create_net(net
);
6423 nn
->boot_time
= get_seconds();
6424 nn
->grace_ended
= false;
6425 locks_start_grace(net
, &nn
->nfsd4_manager
);
6426 nfsd4_client_tracking_init(net
);
6427 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
6428 nn
->nfsd4_grace
, net
);
6429 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
6433 /* initialization to perform when the nfsd service is started: */
6436 nfs4_state_start(void)
6440 ret
= set_callback_cred();
6443 laundry_wq
= create_singlethread_workqueue("nfsd4");
6444 if (laundry_wq
== NULL
) {
6448 ret
= nfsd4_create_callback_queue();
6450 goto out_free_laundry
;
6452 set_max_delegations();
6457 destroy_workqueue(laundry_wq
);
6463 nfs4_state_shutdown_net(struct net
*net
)
6465 struct nfs4_delegation
*dp
= NULL
;
6466 struct list_head
*pos
, *next
, reaplist
;
6467 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6469 cancel_delayed_work_sync(&nn
->laundromat_work
);
6470 locks_end_grace(&nn
->nfsd4_manager
);
6472 INIT_LIST_HEAD(&reaplist
);
6473 spin_lock(&state_lock
);
6474 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
6475 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6476 unhash_delegation_locked(dp
);
6477 list_add(&dp
->dl_recall_lru
, &reaplist
);
6479 spin_unlock(&state_lock
);
6480 list_for_each_safe(pos
, next
, &reaplist
) {
6481 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6482 list_del_init(&dp
->dl_recall_lru
);
6483 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
6484 nfs4_put_stid(&dp
->dl_stid
);
6487 nfsd4_client_tracking_exit(net
);
6488 nfs4_state_destroy_net(net
);
6492 nfs4_state_shutdown(void)
6494 destroy_workqueue(laundry_wq
);
6495 nfsd4_destroy_callback_queue();
6499 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6501 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
6502 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
6506 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6508 if (cstate
->minorversion
) {
6509 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
6510 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6515 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
6517 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6521 * functions to set current state id
6524 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6526 put_stateid(cstate
, &odp
->od_stateid
);
6530 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
6532 put_stateid(cstate
, &open
->op_stateid
);
6536 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6538 put_stateid(cstate
, &close
->cl_stateid
);
6542 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
6544 put_stateid(cstate
, &lock
->lk_resp_stateid
);
6548 * functions to consume current state id
6552 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6554 get_stateid(cstate
, &odp
->od_stateid
);
6558 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
6560 get_stateid(cstate
, &drp
->dr_stateid
);
6564 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
6566 get_stateid(cstate
, &fsp
->fr_stateid
);
6570 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
6572 get_stateid(cstate
, &setattr
->sa_stateid
);
6576 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6578 get_stateid(cstate
, &close
->cl_stateid
);
6582 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
6584 get_stateid(cstate
, &locku
->lu_stateid
);
6588 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
6590 get_stateid(cstate
, &read
->rd_stateid
);
6594 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
6596 get_stateid(cstate
, &write
->wr_stateid
);