2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/jhash.h>
48 #include "current_stateid.h"
53 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 #define all_ones {{~0,~0},~0}
56 static const stateid_t one_stateid
= {
58 .si_opaque
= all_ones
,
60 static const stateid_t zero_stateid
= {
63 static const stateid_t currentstateid
= {
67 static u64 current_sessionid
= 1;
69 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
70 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
71 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
73 /* forward declarations */
74 static bool check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
);
75 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(state_lock
);
87 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
88 * the refcount on the open stateid to drop.
90 static DECLARE_WAIT_QUEUE_HEAD(close_wq
);
92 static struct kmem_cache
*openowner_slab
;
93 static struct kmem_cache
*lockowner_slab
;
94 static struct kmem_cache
*file_slab
;
95 static struct kmem_cache
*stateid_slab
;
96 static struct kmem_cache
*deleg_slab
;
97 static struct kmem_cache
*odstate_slab
;
99 static void free_session(struct nfsd4_session
*);
101 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
;
103 static bool is_session_dead(struct nfsd4_session
*ses
)
105 return ses
->se_flags
& NFS4_SESSION_DEAD
;
108 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
110 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
111 return nfserr_jukebox
;
112 ses
->se_flags
|= NFS4_SESSION_DEAD
;
116 static bool is_client_expired(struct nfs4_client
*clp
)
118 return clp
->cl_time
== 0;
121 static __be32
get_client_locked(struct nfs4_client
*clp
)
123 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
125 lockdep_assert_held(&nn
->client_lock
);
127 if (is_client_expired(clp
))
128 return nfserr_expired
;
129 atomic_inc(&clp
->cl_refcount
);
133 /* must be called under the client_lock */
135 renew_client_locked(struct nfs4_client
*clp
)
137 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
139 if (is_client_expired(clp
)) {
141 printk("%s: client (clientid %08x/%08x) already expired\n",
143 clp
->cl_clientid
.cl_boot
,
144 clp
->cl_clientid
.cl_id
);
148 dprintk("renewing client (clientid %08x/%08x)\n",
149 clp
->cl_clientid
.cl_boot
,
150 clp
->cl_clientid
.cl_id
);
151 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
152 clp
->cl_time
= get_seconds();
155 static void put_client_renew_locked(struct nfs4_client
*clp
)
157 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
159 lockdep_assert_held(&nn
->client_lock
);
161 if (!atomic_dec_and_test(&clp
->cl_refcount
))
163 if (!is_client_expired(clp
))
164 renew_client_locked(clp
);
167 static void put_client_renew(struct nfs4_client
*clp
)
169 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
171 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
173 if (!is_client_expired(clp
))
174 renew_client_locked(clp
);
175 spin_unlock(&nn
->client_lock
);
178 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
182 if (is_session_dead(ses
))
183 return nfserr_badsession
;
184 status
= get_client_locked(ses
->se_client
);
187 atomic_inc(&ses
->se_ref
);
191 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
193 struct nfs4_client
*clp
= ses
->se_client
;
194 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
196 lockdep_assert_held(&nn
->client_lock
);
198 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
200 put_client_renew_locked(clp
);
203 static void nfsd4_put_session(struct nfsd4_session
*ses
)
205 struct nfs4_client
*clp
= ses
->se_client
;
206 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
208 spin_lock(&nn
->client_lock
);
209 nfsd4_put_session_locked(ses
);
210 spin_unlock(&nn
->client_lock
);
213 static inline struct nfs4_stateowner
*
214 nfs4_get_stateowner(struct nfs4_stateowner
*sop
)
216 atomic_inc(&sop
->so_count
);
221 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
)
223 return (sop
->so_owner
.len
== owner
->len
) &&
224 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
);
227 static struct nfs4_openowner
*
228 find_openstateowner_str_locked(unsigned int hashval
, struct nfsd4_open
*open
,
229 struct nfs4_client
*clp
)
231 struct nfs4_stateowner
*so
;
233 lockdep_assert_held(&clp
->cl_lock
);
235 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[hashval
],
237 if (!so
->so_is_open_owner
)
239 if (same_owner_str(so
, &open
->op_owner
))
240 return openowner(nfs4_get_stateowner(so
));
245 static struct nfs4_openowner
*
246 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
247 struct nfs4_client
*clp
)
249 struct nfs4_openowner
*oo
;
251 spin_lock(&clp
->cl_lock
);
252 oo
= find_openstateowner_str_locked(hashval
, open
, clp
);
253 spin_unlock(&clp
->cl_lock
);
258 opaque_hashval(const void *ptr
, int nbytes
)
260 unsigned char *cptr
= (unsigned char *) ptr
;
270 static void nfsd4_free_file_rcu(struct rcu_head
*rcu
)
272 struct nfs4_file
*fp
= container_of(rcu
, struct nfs4_file
, fi_rcu
);
274 kmem_cache_free(file_slab
, fp
);
278 put_nfs4_file(struct nfs4_file
*fi
)
280 might_lock(&state_lock
);
282 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
283 hlist_del_rcu(&fi
->fi_hash
);
284 spin_unlock(&state_lock
);
285 WARN_ON_ONCE(!list_empty(&fi
->fi_clnt_odstate
));
286 WARN_ON_ONCE(!list_empty(&fi
->fi_delegations
));
287 call_rcu(&fi
->fi_rcu
, nfsd4_free_file_rcu
);
292 __nfs4_get_fd(struct nfs4_file
*f
, int oflag
)
294 if (f
->fi_fds
[oflag
])
295 return get_file(f
->fi_fds
[oflag
]);
300 find_writeable_file_locked(struct nfs4_file
*f
)
304 lockdep_assert_held(&f
->fi_lock
);
306 ret
= __nfs4_get_fd(f
, O_WRONLY
);
308 ret
= __nfs4_get_fd(f
, O_RDWR
);
313 find_writeable_file(struct nfs4_file
*f
)
317 spin_lock(&f
->fi_lock
);
318 ret
= find_writeable_file_locked(f
);
319 spin_unlock(&f
->fi_lock
);
324 static struct file
*find_readable_file_locked(struct nfs4_file
*f
)
328 lockdep_assert_held(&f
->fi_lock
);
330 ret
= __nfs4_get_fd(f
, O_RDONLY
);
332 ret
= __nfs4_get_fd(f
, O_RDWR
);
337 find_readable_file(struct nfs4_file
*f
)
341 spin_lock(&f
->fi_lock
);
342 ret
= find_readable_file_locked(f
);
343 spin_unlock(&f
->fi_lock
);
349 find_any_file(struct nfs4_file
*f
)
353 spin_lock(&f
->fi_lock
);
354 ret
= __nfs4_get_fd(f
, O_RDWR
);
356 ret
= __nfs4_get_fd(f
, O_WRONLY
);
358 ret
= __nfs4_get_fd(f
, O_RDONLY
);
360 spin_unlock(&f
->fi_lock
);
364 static atomic_long_t num_delegations
;
365 unsigned long max_delegations
;
368 * Open owner state (share locks)
371 /* hash tables for lock and open owners */
372 #define OWNER_HASH_BITS 8
373 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
374 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
376 static unsigned int ownerstr_hashval(struct xdr_netobj
*ownername
)
380 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
381 return ret
& OWNER_HASH_MASK
;
384 /* hash table for nfs4_file */
385 #define FILE_HASH_BITS 8
386 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
388 static unsigned int nfsd_fh_hashval(struct knfsd_fh
*fh
)
390 return jhash2(fh
->fh_base
.fh_pad
, XDR_QUADLEN(fh
->fh_size
), 0);
393 static unsigned int file_hashval(struct knfsd_fh
*fh
)
395 return nfsd_fh_hashval(fh
) & (FILE_HASH_SIZE
- 1);
398 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
401 __nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
403 lockdep_assert_held(&fp
->fi_lock
);
405 if (access
& NFS4_SHARE_ACCESS_WRITE
)
406 atomic_inc(&fp
->fi_access
[O_WRONLY
]);
407 if (access
& NFS4_SHARE_ACCESS_READ
)
408 atomic_inc(&fp
->fi_access
[O_RDONLY
]);
412 nfs4_file_get_access(struct nfs4_file
*fp
, u32 access
)
414 lockdep_assert_held(&fp
->fi_lock
);
416 /* Does this access mode make sense? */
417 if (access
& ~NFS4_SHARE_ACCESS_BOTH
)
420 /* Does it conflict with a deny mode already set? */
421 if ((access
& fp
->fi_share_deny
) != 0)
422 return nfserr_share_denied
;
424 __nfs4_file_get_access(fp
, access
);
428 static __be32
nfs4_file_check_deny(struct nfs4_file
*fp
, u32 deny
)
430 /* Common case is that there is no deny mode. */
432 /* Does this deny mode make sense? */
433 if (deny
& ~NFS4_SHARE_DENY_BOTH
)
436 if ((deny
& NFS4_SHARE_DENY_READ
) &&
437 atomic_read(&fp
->fi_access
[O_RDONLY
]))
438 return nfserr_share_denied
;
440 if ((deny
& NFS4_SHARE_DENY_WRITE
) &&
441 atomic_read(&fp
->fi_access
[O_WRONLY
]))
442 return nfserr_share_denied
;
447 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
449 might_lock(&fp
->fi_lock
);
451 if (atomic_dec_and_lock(&fp
->fi_access
[oflag
], &fp
->fi_lock
)) {
452 struct file
*f1
= NULL
;
453 struct file
*f2
= NULL
;
455 swap(f1
, fp
->fi_fds
[oflag
]);
456 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
457 swap(f2
, fp
->fi_fds
[O_RDWR
]);
458 spin_unlock(&fp
->fi_lock
);
466 static void nfs4_file_put_access(struct nfs4_file
*fp
, u32 access
)
468 WARN_ON_ONCE(access
& ~NFS4_SHARE_ACCESS_BOTH
);
470 if (access
& NFS4_SHARE_ACCESS_WRITE
)
471 __nfs4_file_put_access(fp
, O_WRONLY
);
472 if (access
& NFS4_SHARE_ACCESS_READ
)
473 __nfs4_file_put_access(fp
, O_RDONLY
);
477 * Allocate a new open/delegation state counter. This is needed for
478 * pNFS for proper return on close semantics.
480 * Note that we only allocate it for pNFS-enabled exports, otherwise
481 * all pointers to struct nfs4_clnt_odstate are always NULL.
483 static struct nfs4_clnt_odstate
*
484 alloc_clnt_odstate(struct nfs4_client
*clp
)
486 struct nfs4_clnt_odstate
*co
;
488 co
= kmem_cache_zalloc(odstate_slab
, GFP_KERNEL
);
491 atomic_set(&co
->co_odcount
, 1);
497 hash_clnt_odstate_locked(struct nfs4_clnt_odstate
*co
)
499 struct nfs4_file
*fp
= co
->co_file
;
501 lockdep_assert_held(&fp
->fi_lock
);
502 list_add(&co
->co_perfile
, &fp
->fi_clnt_odstate
);
506 get_clnt_odstate(struct nfs4_clnt_odstate
*co
)
509 atomic_inc(&co
->co_odcount
);
513 put_clnt_odstate(struct nfs4_clnt_odstate
*co
)
515 struct nfs4_file
*fp
;
521 if (atomic_dec_and_lock(&co
->co_odcount
, &fp
->fi_lock
)) {
522 list_del(&co
->co_perfile
);
523 spin_unlock(&fp
->fi_lock
);
525 nfsd4_return_all_file_layouts(co
->co_client
, fp
);
526 kmem_cache_free(odstate_slab
, co
);
530 static struct nfs4_clnt_odstate
*
531 find_or_hash_clnt_odstate(struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*new)
533 struct nfs4_clnt_odstate
*co
;
534 struct nfs4_client
*cl
;
541 spin_lock(&fp
->fi_lock
);
542 list_for_each_entry(co
, &fp
->fi_clnt_odstate
, co_perfile
) {
543 if (co
->co_client
== cl
) {
544 get_clnt_odstate(co
);
550 hash_clnt_odstate_locked(new);
552 spin_unlock(&fp
->fi_lock
);
556 struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
,
557 struct kmem_cache
*slab
)
559 struct nfs4_stid
*stid
;
562 stid
= kmem_cache_zalloc(slab
, GFP_KERNEL
);
566 idr_preload(GFP_KERNEL
);
567 spin_lock(&cl
->cl_lock
);
568 new_id
= idr_alloc_cyclic(&cl
->cl_stateids
, stid
, 0, 0, GFP_NOWAIT
);
569 spin_unlock(&cl
->cl_lock
);
573 stid
->sc_client
= cl
;
574 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
575 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
576 /* Will be incremented before return to client: */
577 atomic_set(&stid
->sc_count
, 1);
578 spin_lock_init(&stid
->sc_lock
);
581 * It shouldn't be a problem to reuse an opaque stateid value.
582 * I don't think it is for 4.1. But with 4.0 I worry that, for
583 * example, a stray write retransmission could be accepted by
584 * the server when it should have been rejected. Therefore,
585 * adopt a trick from the sctp code to attempt to maximize the
586 * amount of time until an id is reused, by ensuring they always
587 * "increase" (mod INT_MAX):
591 kmem_cache_free(slab
, stid
);
595 static struct nfs4_ol_stateid
* nfs4_alloc_open_stateid(struct nfs4_client
*clp
)
597 struct nfs4_stid
*stid
;
598 struct nfs4_ol_stateid
*stp
;
600 stid
= nfs4_alloc_stid(clp
, stateid_slab
);
604 stp
= openlockstateid(stid
);
605 stp
->st_stid
.sc_free
= nfs4_free_ol_stateid
;
609 static void nfs4_free_deleg(struct nfs4_stid
*stid
)
611 kmem_cache_free(deleg_slab
, stid
);
612 atomic_long_dec(&num_delegations
);
616 * When we recall a delegation, we should be careful not to hand it
617 * out again straight away.
618 * To ensure this we keep a pair of bloom filters ('new' and 'old')
619 * in which the filehandles of recalled delegations are "stored".
620 * If a filehandle appear in either filter, a delegation is blocked.
621 * When a delegation is recalled, the filehandle is stored in the "new"
623 * Every 30 seconds we swap the filters and clear the "new" one,
624 * unless both are empty of course.
626 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
627 * low 3 bytes as hash-table indices.
629 * 'blocked_delegations_lock', which is always taken in block_delegations(),
630 * is used to manage concurrent access. Testing does not need the lock
631 * except when swapping the two filters.
633 static DEFINE_SPINLOCK(blocked_delegations_lock
);
634 static struct bloom_pair
{
635 int entries
, old_entries
;
637 int new; /* index into 'set' */
638 DECLARE_BITMAP(set
[2], 256);
639 } blocked_delegations
;
641 static int delegation_blocked(struct knfsd_fh
*fh
)
644 struct bloom_pair
*bd
= &blocked_delegations
;
646 if (bd
->entries
== 0)
648 if (seconds_since_boot() - bd
->swap_time
> 30) {
649 spin_lock(&blocked_delegations_lock
);
650 if (seconds_since_boot() - bd
->swap_time
> 30) {
651 bd
->entries
-= bd
->old_entries
;
652 bd
->old_entries
= bd
->entries
;
653 memset(bd
->set
[bd
->new], 0,
656 bd
->swap_time
= seconds_since_boot();
658 spin_unlock(&blocked_delegations_lock
);
660 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
661 if (test_bit(hash
&255, bd
->set
[0]) &&
662 test_bit((hash
>>8)&255, bd
->set
[0]) &&
663 test_bit((hash
>>16)&255, bd
->set
[0]))
666 if (test_bit(hash
&255, bd
->set
[1]) &&
667 test_bit((hash
>>8)&255, bd
->set
[1]) &&
668 test_bit((hash
>>16)&255, bd
->set
[1]))
674 static void block_delegations(struct knfsd_fh
*fh
)
677 struct bloom_pair
*bd
= &blocked_delegations
;
679 hash
= jhash(&fh
->fh_base
, fh
->fh_size
, 0);
681 spin_lock(&blocked_delegations_lock
);
682 __set_bit(hash
&255, bd
->set
[bd
->new]);
683 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
684 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
685 if (bd
->entries
== 0)
686 bd
->swap_time
= seconds_since_boot();
688 spin_unlock(&blocked_delegations_lock
);
691 static struct nfs4_delegation
*
692 alloc_init_deleg(struct nfs4_client
*clp
, struct svc_fh
*current_fh
,
693 struct nfs4_clnt_odstate
*odstate
)
695 struct nfs4_delegation
*dp
;
698 dprintk("NFSD alloc_init_deleg\n");
699 n
= atomic_long_inc_return(&num_delegations
);
700 if (n
< 0 || n
> max_delegations
)
702 if (delegation_blocked(¤t_fh
->fh_handle
))
704 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
708 dp
->dl_stid
.sc_free
= nfs4_free_deleg
;
710 * delegation seqid's are never incremented. The 4.1 special
711 * meaning of seqid 0 isn't meaningful, really, but let's avoid
712 * 0 anyway just for consistency and use 1:
714 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
715 INIT_LIST_HEAD(&dp
->dl_perfile
);
716 INIT_LIST_HEAD(&dp
->dl_perclnt
);
717 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
718 dp
->dl_clnt_odstate
= odstate
;
719 get_clnt_odstate(odstate
);
720 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
722 nfsd4_init_cb(&dp
->dl_recall
, dp
->dl_stid
.sc_client
,
723 &nfsd4_cb_recall_ops
, NFSPROC4_CLNT_CB_RECALL
);
726 atomic_long_dec(&num_delegations
);
731 nfs4_put_stid(struct nfs4_stid
*s
)
733 struct nfs4_file
*fp
= s
->sc_file
;
734 struct nfs4_client
*clp
= s
->sc_client
;
736 might_lock(&clp
->cl_lock
);
738 if (!atomic_dec_and_lock(&s
->sc_count
, &clp
->cl_lock
)) {
739 wake_up_all(&close_wq
);
742 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
743 spin_unlock(&clp
->cl_lock
);
750 nfs4_inc_and_copy_stateid(stateid_t
*dst
, struct nfs4_stid
*stid
)
752 stateid_t
*src
= &stid
->sc_stateid
;
754 spin_lock(&stid
->sc_lock
);
755 if (unlikely(++src
->si_generation
== 0))
756 src
->si_generation
= 1;
757 memcpy(dst
, src
, sizeof(*dst
));
758 spin_unlock(&stid
->sc_lock
);
761 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
763 struct file
*filp
= NULL
;
765 spin_lock(&fp
->fi_lock
);
766 if (fp
->fi_deleg_file
&& --fp
->fi_delegees
== 0)
767 swap(filp
, fp
->fi_deleg_file
);
768 spin_unlock(&fp
->fi_lock
);
771 vfs_setlease(filp
, F_UNLCK
, NULL
, (void **)&fp
);
776 void nfs4_unhash_stid(struct nfs4_stid
*s
)
782 * nfs4_get_existing_delegation - Discover if this delegation already exists
783 * @clp: a pointer to the nfs4_client we're granting a delegation to
784 * @fp: a pointer to the nfs4_file we're granting a delegation on
787 * On success: NULL if an existing delegation was not found.
789 * On error: -EAGAIN if one was previously granted to this nfs4_client
790 * for this nfs4_file.
795 nfs4_get_existing_delegation(struct nfs4_client
*clp
, struct nfs4_file
*fp
)
797 struct nfs4_delegation
*searchdp
= NULL
;
798 struct nfs4_client
*searchclp
= NULL
;
800 lockdep_assert_held(&state_lock
);
801 lockdep_assert_held(&fp
->fi_lock
);
803 list_for_each_entry(searchdp
, &fp
->fi_delegations
, dl_perfile
) {
804 searchclp
= searchdp
->dl_stid
.sc_client
;
805 if (clp
== searchclp
) {
813 * hash_delegation_locked - Add a delegation to the appropriate lists
814 * @dp: a pointer to the nfs4_delegation we are adding.
815 * @fp: a pointer to the nfs4_file we're granting a delegation on
818 * On success: NULL if the delegation was successfully hashed.
820 * On error: -EAGAIN if one was previously granted to this
821 * nfs4_client for this nfs4_file. Delegation is not hashed.
826 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
829 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
831 lockdep_assert_held(&state_lock
);
832 lockdep_assert_held(&fp
->fi_lock
);
834 status
= nfs4_get_existing_delegation(clp
, fp
);
838 atomic_inc(&dp
->dl_stid
.sc_count
);
839 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
840 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
841 list_add(&dp
->dl_perclnt
, &clp
->cl_delegations
);
846 unhash_delegation_locked(struct nfs4_delegation
*dp
)
848 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
850 lockdep_assert_held(&state_lock
);
852 if (list_empty(&dp
->dl_perfile
))
855 dp
->dl_stid
.sc_type
= NFS4_CLOSED_DELEG_STID
;
856 /* Ensure that deleg break won't try to requeue it */
858 spin_lock(&fp
->fi_lock
);
859 list_del_init(&dp
->dl_perclnt
);
860 list_del_init(&dp
->dl_recall_lru
);
861 list_del_init(&dp
->dl_perfile
);
862 spin_unlock(&fp
->fi_lock
);
866 static void destroy_delegation(struct nfs4_delegation
*dp
)
870 spin_lock(&state_lock
);
871 unhashed
= unhash_delegation_locked(dp
);
872 spin_unlock(&state_lock
);
874 put_clnt_odstate(dp
->dl_clnt_odstate
);
875 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
876 nfs4_put_stid(&dp
->dl_stid
);
880 static void revoke_delegation(struct nfs4_delegation
*dp
)
882 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
884 WARN_ON(!list_empty(&dp
->dl_recall_lru
));
886 put_clnt_odstate(dp
->dl_clnt_odstate
);
887 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
889 if (clp
->cl_minorversion
== 0)
890 nfs4_put_stid(&dp
->dl_stid
);
892 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
893 spin_lock(&clp
->cl_lock
);
894 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
895 spin_unlock(&clp
->cl_lock
);
903 static unsigned int clientid_hashval(u32 id
)
905 return id
& CLIENT_HASH_MASK
;
908 static unsigned int clientstr_hashval(const char *name
)
910 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
914 * We store the NONE, READ, WRITE, and BOTH bits separately in the
915 * st_{access,deny}_bmap field of the stateid, in order to track not
916 * only what share bits are currently in force, but also what
917 * combinations of share bits previous opens have used. This allows us
918 * to enforce the recommendation of rfc 3530 14.2.19 that the server
919 * return an error if the client attempt to downgrade to a combination
920 * of share bits not explicable by closing some of its previous opens.
922 * XXX: This enforcement is actually incomplete, since we don't keep
923 * track of access/deny bit combinations; so, e.g., we allow:
925 * OPEN allow read, deny write
926 * OPEN allow both, deny none
927 * DOWNGRADE allow read, deny none
929 * which we should reject.
932 bmap_to_share_mode(unsigned long bmap
) {
934 unsigned int access
= 0;
936 for (i
= 1; i
< 4; i
++) {
937 if (test_bit(i
, &bmap
))
943 /* set share access for a given stateid */
945 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
947 unsigned char mask
= 1 << access
;
949 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
950 stp
->st_access_bmap
|= mask
;
953 /* clear share access for a given stateid */
955 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
957 unsigned char mask
= 1 << access
;
959 WARN_ON_ONCE(access
> NFS4_SHARE_ACCESS_BOTH
);
960 stp
->st_access_bmap
&= ~mask
;
963 /* test whether a given stateid has access */
965 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
967 unsigned char mask
= 1 << access
;
969 return (bool)(stp
->st_access_bmap
& mask
);
972 /* set share deny for a given stateid */
974 set_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
976 unsigned char mask
= 1 << deny
;
978 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
979 stp
->st_deny_bmap
|= mask
;
982 /* clear share deny for a given stateid */
984 clear_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
986 unsigned char mask
= 1 << deny
;
988 WARN_ON_ONCE(deny
> NFS4_SHARE_DENY_BOTH
);
989 stp
->st_deny_bmap
&= ~mask
;
992 /* test whether a given stateid is denying specific access */
994 test_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
996 unsigned char mask
= 1 << deny
;
998 return (bool)(stp
->st_deny_bmap
& mask
);
1001 static int nfs4_access_to_omode(u32 access
)
1003 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
1004 case NFS4_SHARE_ACCESS_READ
:
1006 case NFS4_SHARE_ACCESS_WRITE
:
1008 case NFS4_SHARE_ACCESS_BOTH
:
1016 * A stateid that had a deny mode associated with it is being released
1017 * or downgraded. Recalculate the deny mode on the file.
1020 recalculate_deny_mode(struct nfs4_file
*fp
)
1022 struct nfs4_ol_stateid
*stp
;
1024 spin_lock(&fp
->fi_lock
);
1025 fp
->fi_share_deny
= 0;
1026 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
)
1027 fp
->fi_share_deny
|= bmap_to_share_mode(stp
->st_deny_bmap
);
1028 spin_unlock(&fp
->fi_lock
);
1032 reset_union_bmap_deny(u32 deny
, struct nfs4_ol_stateid
*stp
)
1035 bool change
= false;
1037 for (i
= 1; i
< 4; i
++) {
1038 if ((i
& deny
) != i
) {
1044 /* Recalculate per-file deny mode if there was a change */
1046 recalculate_deny_mode(stp
->st_stid
.sc_file
);
1049 /* release all access and file references for a given stateid */
1051 release_all_access(struct nfs4_ol_stateid
*stp
)
1054 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1056 if (fp
&& stp
->st_deny_bmap
!= 0)
1057 recalculate_deny_mode(fp
);
1059 for (i
= 1; i
< 4; i
++) {
1060 if (test_access(i
, stp
))
1061 nfs4_file_put_access(stp
->st_stid
.sc_file
, i
);
1062 clear_access(i
, stp
);
1066 static inline void nfs4_free_stateowner(struct nfs4_stateowner
*sop
)
1068 kfree(sop
->so_owner
.data
);
1069 sop
->so_ops
->so_free(sop
);
1072 static void nfs4_put_stateowner(struct nfs4_stateowner
*sop
)
1074 struct nfs4_client
*clp
= sop
->so_client
;
1076 might_lock(&clp
->cl_lock
);
1078 if (!atomic_dec_and_lock(&sop
->so_count
, &clp
->cl_lock
))
1080 sop
->so_ops
->so_unhash(sop
);
1081 spin_unlock(&clp
->cl_lock
);
1082 nfs4_free_stateowner(sop
);
1085 static bool unhash_ol_stateid(struct nfs4_ol_stateid
*stp
)
1087 struct nfs4_file
*fp
= stp
->st_stid
.sc_file
;
1089 lockdep_assert_held(&stp
->st_stateowner
->so_client
->cl_lock
);
1091 if (list_empty(&stp
->st_perfile
))
1094 spin_lock(&fp
->fi_lock
);
1095 list_del_init(&stp
->st_perfile
);
1096 spin_unlock(&fp
->fi_lock
);
1097 list_del(&stp
->st_perstateowner
);
1101 static void nfs4_free_ol_stateid(struct nfs4_stid
*stid
)
1103 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1105 put_clnt_odstate(stp
->st_clnt_odstate
);
1106 release_all_access(stp
);
1107 if (stp
->st_stateowner
)
1108 nfs4_put_stateowner(stp
->st_stateowner
);
1109 kmem_cache_free(stateid_slab
, stid
);
1112 static void nfs4_free_lock_stateid(struct nfs4_stid
*stid
)
1114 struct nfs4_ol_stateid
*stp
= openlockstateid(stid
);
1115 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
1118 file
= find_any_file(stp
->st_stid
.sc_file
);
1120 filp_close(file
, (fl_owner_t
)lo
);
1121 nfs4_free_ol_stateid(stid
);
1125 * Put the persistent reference to an already unhashed generic stateid, while
1126 * holding the cl_lock. If it's the last reference, then put it onto the
1127 * reaplist for later destruction.
1129 static void put_ol_stateid_locked(struct nfs4_ol_stateid
*stp
,
1130 struct list_head
*reaplist
)
1132 struct nfs4_stid
*s
= &stp
->st_stid
;
1133 struct nfs4_client
*clp
= s
->sc_client
;
1135 lockdep_assert_held(&clp
->cl_lock
);
1137 WARN_ON_ONCE(!list_empty(&stp
->st_locks
));
1139 if (!atomic_dec_and_test(&s
->sc_count
)) {
1140 wake_up_all(&close_wq
);
1144 idr_remove(&clp
->cl_stateids
, s
->sc_stateid
.si_opaque
.so_id
);
1145 list_add(&stp
->st_locks
, reaplist
);
1148 static bool unhash_lock_stateid(struct nfs4_ol_stateid
*stp
)
1150 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
1152 lockdep_assert_held(&oo
->oo_owner
.so_client
->cl_lock
);
1154 list_del_init(&stp
->st_locks
);
1155 nfs4_unhash_stid(&stp
->st_stid
);
1156 return unhash_ol_stateid(stp
);
1159 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
1161 struct nfs4_openowner
*oo
= openowner(stp
->st_openstp
->st_stateowner
);
1164 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
1165 unhashed
= unhash_lock_stateid(stp
);
1166 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
1168 nfs4_put_stid(&stp
->st_stid
);
1171 static void unhash_lockowner_locked(struct nfs4_lockowner
*lo
)
1173 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
1175 lockdep_assert_held(&clp
->cl_lock
);
1177 list_del_init(&lo
->lo_owner
.so_strhash
);
1181 * Free a list of generic stateids that were collected earlier after being
1185 free_ol_stateid_reaplist(struct list_head
*reaplist
)
1187 struct nfs4_ol_stateid
*stp
;
1188 struct nfs4_file
*fp
;
1192 while (!list_empty(reaplist
)) {
1193 stp
= list_first_entry(reaplist
, struct nfs4_ol_stateid
,
1195 list_del(&stp
->st_locks
);
1196 fp
= stp
->st_stid
.sc_file
;
1197 stp
->st_stid
.sc_free(&stp
->st_stid
);
1203 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
,
1204 struct list_head
*reaplist
)
1206 struct nfs4_ol_stateid
*stp
;
1208 lockdep_assert_held(&open_stp
->st_stid
.sc_client
->cl_lock
);
1210 while (!list_empty(&open_stp
->st_locks
)) {
1211 stp
= list_entry(open_stp
->st_locks
.next
,
1212 struct nfs4_ol_stateid
, st_locks
);
1213 WARN_ON(!unhash_lock_stateid(stp
));
1214 put_ol_stateid_locked(stp
, reaplist
);
1218 static bool unhash_open_stateid(struct nfs4_ol_stateid
*stp
,
1219 struct list_head
*reaplist
)
1223 lockdep_assert_held(&stp
->st_stid
.sc_client
->cl_lock
);
1225 unhashed
= unhash_ol_stateid(stp
);
1226 release_open_stateid_locks(stp
, reaplist
);
1230 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
1232 LIST_HEAD(reaplist
);
1234 spin_lock(&stp
->st_stid
.sc_client
->cl_lock
);
1235 if (unhash_open_stateid(stp
, &reaplist
))
1236 put_ol_stateid_locked(stp
, &reaplist
);
1237 spin_unlock(&stp
->st_stid
.sc_client
->cl_lock
);
1238 free_ol_stateid_reaplist(&reaplist
);
1241 static void unhash_openowner_locked(struct nfs4_openowner
*oo
)
1243 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1245 lockdep_assert_held(&clp
->cl_lock
);
1247 list_del_init(&oo
->oo_owner
.so_strhash
);
1248 list_del_init(&oo
->oo_perclient
);
1251 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
1253 struct nfsd_net
*nn
= net_generic(oo
->oo_owner
.so_client
->net
,
1255 struct nfs4_ol_stateid
*s
;
1257 spin_lock(&nn
->client_lock
);
1258 s
= oo
->oo_last_closed_stid
;
1260 list_del_init(&oo
->oo_close_lru
);
1261 oo
->oo_last_closed_stid
= NULL
;
1263 spin_unlock(&nn
->client_lock
);
1265 nfs4_put_stid(&s
->st_stid
);
1268 static void release_openowner(struct nfs4_openowner
*oo
)
1270 struct nfs4_ol_stateid
*stp
;
1271 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
1272 struct list_head reaplist
;
1274 INIT_LIST_HEAD(&reaplist
);
1276 spin_lock(&clp
->cl_lock
);
1277 unhash_openowner_locked(oo
);
1278 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
1279 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
1280 struct nfs4_ol_stateid
, st_perstateowner
);
1281 if (unhash_open_stateid(stp
, &reaplist
))
1282 put_ol_stateid_locked(stp
, &reaplist
);
1284 spin_unlock(&clp
->cl_lock
);
1285 free_ol_stateid_reaplist(&reaplist
);
1286 release_last_closed_stateid(oo
);
1287 nfs4_put_stateowner(&oo
->oo_owner
);
1291 hash_sessionid(struct nfs4_sessionid
*sessionid
)
1293 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
1295 return sid
->sequence
% SESSION_HASH_SIZE
;
1298 #ifdef CONFIG_SUNRPC_DEBUG
1300 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1302 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
1303 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
1307 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
1313 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1314 * won't be used for replay.
1316 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
1318 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
1320 if (nfserr
== nfserr_replay_me
)
1323 if (!seqid_mutating_err(ntohl(nfserr
))) {
1324 nfsd4_cstate_clear_replay(cstate
);
1329 if (so
->so_is_open_owner
)
1330 release_last_closed_stateid(openowner(so
));
1336 gen_sessionid(struct nfsd4_session
*ses
)
1338 struct nfs4_client
*clp
= ses
->se_client
;
1339 struct nfsd4_sessionid
*sid
;
1341 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
1342 sid
->clientid
= clp
->cl_clientid
;
1343 sid
->sequence
= current_sessionid
++;
1348 * The protocol defines ca_maxresponssize_cached to include the size of
1349 * the rpc header, but all we need to cache is the data starting after
1350 * the end of the initial SEQUENCE operation--the rest we regenerate
1351 * each time. Therefore we can advertise a ca_maxresponssize_cached
1352 * value that is the number of bytes in our cache plus a few additional
1353 * bytes. In order to stay on the safe side, and not promise more than
1354 * we can cache, those additional bytes must be the minimum possible: 24
1355 * bytes of rpc header (xid through accept state, with AUTH_NULL
1356 * verifier), 12 for the compound header (with zero-length tag), and 44
1357 * for the SEQUENCE op response:
1359 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1362 free_session_slots(struct nfsd4_session
*ses
)
1366 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
1367 kfree(ses
->se_slots
[i
]);
1371 * We don't actually need to cache the rpc and session headers, so we
1372 * can allocate a little less for each slot:
1374 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
1378 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
1381 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
1382 return size
+ sizeof(struct nfsd4_slot
);
1386 * XXX: If we run out of reserved DRC memory we could (up to a point)
1387 * re-negotiate active sessions and reduce their slot usage to make
1388 * room for new connections. For now we just fail the create session.
1390 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
1392 u32 slotsize
= slot_bytes(ca
);
1393 u32 num
= ca
->maxreqs
;
1396 spin_lock(&nfsd_drc_lock
);
1397 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
1398 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
1399 num
= min_t(int, num
, avail
/ slotsize
);
1400 nfsd_drc_mem_used
+= num
* slotsize
;
1401 spin_unlock(&nfsd_drc_lock
);
1406 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
1408 int slotsize
= slot_bytes(ca
);
1410 spin_lock(&nfsd_drc_lock
);
1411 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
1412 spin_unlock(&nfsd_drc_lock
);
1415 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
1416 struct nfsd4_channel_attrs
*battrs
)
1418 int numslots
= fattrs
->maxreqs
;
1419 int slotsize
= slot_bytes(fattrs
);
1420 struct nfsd4_session
*new;
1423 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
1424 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
1425 mem
= numslots
* sizeof(struct nfsd4_slot
*);
1427 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
1430 /* allocate each struct nfsd4_slot and data cache in one piece */
1431 for (i
= 0; i
< numslots
; i
++) {
1432 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
1433 if (!new->se_slots
[i
])
1437 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
1438 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
1443 kfree(new->se_slots
[i
]);
1448 static void free_conn(struct nfsd4_conn
*c
)
1450 svc_xprt_put(c
->cn_xprt
);
1454 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1456 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1457 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1459 spin_lock(&clp
->cl_lock
);
1460 if (!list_empty(&c
->cn_persession
)) {
1461 list_del(&c
->cn_persession
);
1464 nfsd4_probe_callback(clp
);
1465 spin_unlock(&clp
->cl_lock
);
1468 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1470 struct nfsd4_conn
*conn
;
1472 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1475 svc_xprt_get(rqstp
->rq_xprt
);
1476 conn
->cn_xprt
= rqstp
->rq_xprt
;
1477 conn
->cn_flags
= flags
;
1478 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1482 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1484 conn
->cn_session
= ses
;
1485 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1488 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1490 struct nfs4_client
*clp
= ses
->se_client
;
1492 spin_lock(&clp
->cl_lock
);
1493 __nfsd4_hash_conn(conn
, ses
);
1494 spin_unlock(&clp
->cl_lock
);
1497 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1499 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1500 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1503 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1507 nfsd4_hash_conn(conn
, ses
);
1508 ret
= nfsd4_register_conn(conn
);
1510 /* oops; xprt is already down: */
1511 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1512 /* We may have gained or lost a callback channel: */
1513 nfsd4_probe_callback_sync(ses
->se_client
);
1516 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1518 u32 dir
= NFS4_CDFC4_FORE
;
1520 if (cses
->flags
& SESSION4_BACK_CHAN
)
1521 dir
|= NFS4_CDFC4_BACK
;
1522 return alloc_conn(rqstp
, dir
);
1525 /* must be called under client_lock */
1526 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1528 struct nfs4_client
*clp
= s
->se_client
;
1529 struct nfsd4_conn
*c
;
1531 spin_lock(&clp
->cl_lock
);
1532 while (!list_empty(&s
->se_conns
)) {
1533 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1534 list_del_init(&c
->cn_persession
);
1535 spin_unlock(&clp
->cl_lock
);
1537 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1540 spin_lock(&clp
->cl_lock
);
1542 spin_unlock(&clp
->cl_lock
);
1545 static void __free_session(struct nfsd4_session
*ses
)
1547 free_session_slots(ses
);
1551 static void free_session(struct nfsd4_session
*ses
)
1553 nfsd4_del_conns(ses
);
1554 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1555 __free_session(ses
);
1558 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1561 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1563 new->se_client
= clp
;
1566 INIT_LIST_HEAD(&new->se_conns
);
1568 new->se_cb_seq_nr
= 1;
1569 new->se_flags
= cses
->flags
;
1570 new->se_cb_prog
= cses
->callback_prog
;
1571 new->se_cb_sec
= cses
->cb_sec
;
1572 atomic_set(&new->se_ref
, 0);
1573 idx
= hash_sessionid(&new->se_sessionid
);
1574 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1575 spin_lock(&clp
->cl_lock
);
1576 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1577 spin_unlock(&clp
->cl_lock
);
1580 struct sockaddr
*sa
= svc_addr(rqstp
);
1582 * This is a little silly; with sessions there's no real
1583 * use for the callback address. Use the peer address
1584 * as a reasonable default for now, but consider fixing
1585 * the rpc client not to require an address in the
1588 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1589 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1593 /* caller must hold client_lock */
1594 static struct nfsd4_session
*
1595 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1597 struct nfsd4_session
*elem
;
1599 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1601 lockdep_assert_held(&nn
->client_lock
);
1603 dump_sessionid(__func__
, sessionid
);
1604 idx
= hash_sessionid(sessionid
);
1605 /* Search in the appropriate list */
1606 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1607 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1608 NFS4_MAX_SESSIONID_LEN
)) {
1613 dprintk("%s: session not found\n", __func__
);
1617 static struct nfsd4_session
*
1618 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1621 struct nfsd4_session
*session
;
1622 __be32 status
= nfserr_badsession
;
1624 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1627 status
= nfsd4_get_session_locked(session
);
1635 /* caller must hold client_lock */
1637 unhash_session(struct nfsd4_session
*ses
)
1639 struct nfs4_client
*clp
= ses
->se_client
;
1640 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1642 lockdep_assert_held(&nn
->client_lock
);
1644 list_del(&ses
->se_hash
);
1645 spin_lock(&ses
->se_client
->cl_lock
);
1646 list_del(&ses
->se_perclnt
);
1647 spin_unlock(&ses
->se_client
->cl_lock
);
1650 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1652 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1655 * We're assuming the clid was not given out from a boot
1656 * precisely 2^32 (about 136 years) before this one. That seems
1657 * a safe assumption:
1659 if (clid
->cl_boot
== (u32
)nn
->boot_time
)
1661 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1662 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1667 * XXX Should we use a slab cache ?
1668 * This type of memory management is somewhat inefficient, but we use it
1669 * anyway since SETCLIENTID is not a common operation.
1671 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1673 struct nfs4_client
*clp
;
1676 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1679 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1680 if (clp
->cl_name
.data
== NULL
)
1682 clp
->cl_ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
1683 OWNER_HASH_SIZE
, GFP_KERNEL
);
1684 if (!clp
->cl_ownerstr_hashtbl
)
1685 goto err_no_hashtbl
;
1686 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
1687 INIT_LIST_HEAD(&clp
->cl_ownerstr_hashtbl
[i
]);
1688 clp
->cl_name
.len
= name
.len
;
1689 INIT_LIST_HEAD(&clp
->cl_sessions
);
1690 idr_init(&clp
->cl_stateids
);
1691 atomic_set(&clp
->cl_refcount
, 0);
1692 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1693 INIT_LIST_HEAD(&clp
->cl_idhash
);
1694 INIT_LIST_HEAD(&clp
->cl_openowners
);
1695 INIT_LIST_HEAD(&clp
->cl_delegations
);
1696 INIT_LIST_HEAD(&clp
->cl_lru
);
1697 INIT_LIST_HEAD(&clp
->cl_revoked
);
1698 #ifdef CONFIG_NFSD_PNFS
1699 INIT_LIST_HEAD(&clp
->cl_lo_states
);
1701 spin_lock_init(&clp
->cl_lock
);
1702 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1705 kfree(clp
->cl_name
.data
);
1712 free_client(struct nfs4_client
*clp
)
1714 while (!list_empty(&clp
->cl_sessions
)) {
1715 struct nfsd4_session
*ses
;
1716 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1718 list_del(&ses
->se_perclnt
);
1719 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1722 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1723 free_svc_cred(&clp
->cl_cred
);
1724 kfree(clp
->cl_ownerstr_hashtbl
);
1725 kfree(clp
->cl_name
.data
);
1726 idr_destroy(&clp
->cl_stateids
);
1730 /* must be called under the client_lock */
1732 unhash_client_locked(struct nfs4_client
*clp
)
1734 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1735 struct nfsd4_session
*ses
;
1737 lockdep_assert_held(&nn
->client_lock
);
1739 /* Mark the client as expired! */
1741 /* Make it invisible */
1742 if (!list_empty(&clp
->cl_idhash
)) {
1743 list_del_init(&clp
->cl_idhash
);
1744 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1745 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1747 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1749 list_del_init(&clp
->cl_lru
);
1750 spin_lock(&clp
->cl_lock
);
1751 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1752 list_del_init(&ses
->se_hash
);
1753 spin_unlock(&clp
->cl_lock
);
1757 unhash_client(struct nfs4_client
*clp
)
1759 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1761 spin_lock(&nn
->client_lock
);
1762 unhash_client_locked(clp
);
1763 spin_unlock(&nn
->client_lock
);
1766 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
1768 if (atomic_read(&clp
->cl_refcount
))
1769 return nfserr_jukebox
;
1770 unhash_client_locked(clp
);
1775 __destroy_client(struct nfs4_client
*clp
)
1777 struct nfs4_openowner
*oo
;
1778 struct nfs4_delegation
*dp
;
1779 struct list_head reaplist
;
1781 INIT_LIST_HEAD(&reaplist
);
1782 spin_lock(&state_lock
);
1783 while (!list_empty(&clp
->cl_delegations
)) {
1784 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1785 WARN_ON(!unhash_delegation_locked(dp
));
1786 list_add(&dp
->dl_recall_lru
, &reaplist
);
1788 spin_unlock(&state_lock
);
1789 while (!list_empty(&reaplist
)) {
1790 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1791 list_del_init(&dp
->dl_recall_lru
);
1792 put_clnt_odstate(dp
->dl_clnt_odstate
);
1793 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
1794 nfs4_put_stid(&dp
->dl_stid
);
1796 while (!list_empty(&clp
->cl_revoked
)) {
1797 dp
= list_entry(clp
->cl_revoked
.next
, struct nfs4_delegation
, dl_recall_lru
);
1798 list_del_init(&dp
->dl_recall_lru
);
1799 nfs4_put_stid(&dp
->dl_stid
);
1801 while (!list_empty(&clp
->cl_openowners
)) {
1802 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1803 nfs4_get_stateowner(&oo
->oo_owner
);
1804 release_openowner(oo
);
1806 nfsd4_return_all_client_layouts(clp
);
1807 nfsd4_shutdown_callback(clp
);
1808 if (clp
->cl_cb_conn
.cb_xprt
)
1809 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1814 destroy_client(struct nfs4_client
*clp
)
1817 __destroy_client(clp
);
1820 static void expire_client(struct nfs4_client
*clp
)
1823 nfsd4_client_record_remove(clp
);
1824 __destroy_client(clp
);
1827 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1829 memcpy(target
->cl_verifier
.data
, source
->data
,
1830 sizeof(target
->cl_verifier
.data
));
1833 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1835 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1836 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1839 int strdup_if_nonnull(char **target
, char *source
)
1842 *target
= kstrdup(source
, GFP_KERNEL
);
1850 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1854 ret
= strdup_if_nonnull(&target
->cr_principal
, source
->cr_principal
);
1857 ret
= strdup_if_nonnull(&target
->cr_raw_principal
,
1858 source
->cr_raw_principal
);
1861 target
->cr_flavor
= source
->cr_flavor
;
1862 target
->cr_uid
= source
->cr_uid
;
1863 target
->cr_gid
= source
->cr_gid
;
1864 target
->cr_group_info
= source
->cr_group_info
;
1865 get_group_info(target
->cr_group_info
);
1866 target
->cr_gss_mech
= source
->cr_gss_mech
;
1867 if (source
->cr_gss_mech
)
1868 gss_mech_get(source
->cr_gss_mech
);
1873 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1875 if (o1
->len
< o2
->len
)
1877 if (o1
->len
> o2
->len
)
1879 return memcmp(o1
->data
, o2
->data
, o1
->len
);
1882 static int same_name(const char *n1
, const char *n2
)
1884 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1888 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1890 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1894 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1896 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1899 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1903 if (g1
->ngroups
!= g2
->ngroups
)
1905 for (i
=0; i
<g1
->ngroups
; i
++)
1906 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1912 * RFC 3530 language requires clid_inuse be returned when the
1913 * "principal" associated with a requests differs from that previously
1914 * used. We use uid, gid's, and gss principal string as our best
1915 * approximation. We also don't want to allow non-gss use of a client
1916 * established using gss: in theory cr_principal should catch that
1917 * change, but in practice cr_principal can be null even in the gss case
1918 * since gssd doesn't always pass down a principal string.
1920 static bool is_gss_cred(struct svc_cred
*cr
)
1922 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1923 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1928 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1930 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1931 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1932 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1933 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1935 if (cr1
->cr_principal
== cr2
->cr_principal
)
1937 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1939 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1942 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1944 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1947 if (!cr
->cr_gss_mech
)
1949 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1950 return service
== RPC_GSS_SVC_INTEGRITY
||
1951 service
== RPC_GSS_SVC_PRIVACY
;
1954 bool nfsd4_mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1956 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1958 if (!cl
->cl_mach_cred
)
1960 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1962 if (!svc_rqst_integrity_protected(rqstp
))
1964 if (cl
->cl_cred
.cr_raw_principal
)
1965 return 0 == strcmp(cl
->cl_cred
.cr_raw_principal
,
1966 cr
->cr_raw_principal
);
1967 if (!cr
->cr_principal
)
1969 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1972 static void gen_confirm(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1977 * This is opaque to client, so no need to byte-swap. Use
1978 * __force to keep sparse happy
1980 verf
[0] = (__force __be32
)get_seconds();
1981 verf
[1] = (__force __be32
)nn
->clverifier_counter
++;
1982 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1985 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1987 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1988 clp
->cl_clientid
.cl_id
= nn
->clientid_counter
++;
1989 gen_confirm(clp
, nn
);
1992 static struct nfs4_stid
*
1993 find_stateid_locked(struct nfs4_client
*cl
, stateid_t
*t
)
1995 struct nfs4_stid
*ret
;
1997 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1998 if (!ret
|| !ret
->sc_type
)
2003 static struct nfs4_stid
*
2004 find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
2006 struct nfs4_stid
*s
;
2008 spin_lock(&cl
->cl_lock
);
2009 s
= find_stateid_locked(cl
, t
);
2011 if (typemask
& s
->sc_type
)
2012 atomic_inc(&s
->sc_count
);
2016 spin_unlock(&cl
->cl_lock
);
2020 static struct nfs4_client
*create_client(struct xdr_netobj name
,
2021 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
2023 struct nfs4_client
*clp
;
2024 struct sockaddr
*sa
= svc_addr(rqstp
);
2026 struct net
*net
= SVC_NET(rqstp
);
2028 clp
= alloc_client(name
);
2032 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
2037 nfsd4_init_cb(&clp
->cl_cb_null
, clp
, NULL
, NFSPROC4_CLNT_CB_NULL
);
2038 clp
->cl_time
= get_seconds();
2039 clear_bit(0, &clp
->cl_cb_slot_busy
);
2040 copy_verf(clp
, verf
);
2041 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
2042 clp
->cl_cb_session
= NULL
;
2048 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
2050 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
2051 struct nfs4_client
*clp
;
2054 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
2057 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
2058 new = &((*new)->rb_left
);
2060 new = &((*new)->rb_right
);
2063 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
2064 rb_insert_color(&new_clp
->cl_namenode
, root
);
2067 static struct nfs4_client
*
2068 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
2071 struct rb_node
*node
= root
->rb_node
;
2072 struct nfs4_client
*clp
;
2075 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
2076 cmp
= compare_blob(&clp
->cl_name
, name
);
2078 node
= node
->rb_left
;
2080 node
= node
->rb_right
;
2088 add_to_unconfirmed(struct nfs4_client
*clp
)
2090 unsigned int idhashval
;
2091 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2093 lockdep_assert_held(&nn
->client_lock
);
2095 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2096 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
2097 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2098 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
2099 renew_client_locked(clp
);
2103 move_to_confirmed(struct nfs4_client
*clp
)
2105 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
2106 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2108 lockdep_assert_held(&nn
->client_lock
);
2110 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
2111 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
2112 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
2113 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
2114 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
2115 renew_client_locked(clp
);
2118 static struct nfs4_client
*
2119 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
2121 struct nfs4_client
*clp
;
2122 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
2124 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
2125 if (same_clid(&clp
->cl_clientid
, clid
)) {
2126 if ((bool)clp
->cl_minorversion
!= sessions
)
2128 renew_client_locked(clp
);
2135 static struct nfs4_client
*
2136 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2138 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
2140 lockdep_assert_held(&nn
->client_lock
);
2141 return find_client_in_id_table(tbl
, clid
, sessions
);
2144 static struct nfs4_client
*
2145 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
2147 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
2149 lockdep_assert_held(&nn
->client_lock
);
2150 return find_client_in_id_table(tbl
, clid
, sessions
);
2153 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
2155 return clp
->cl_exchange_flags
!= 0;
2158 static struct nfs4_client
*
2159 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2161 lockdep_assert_held(&nn
->client_lock
);
2162 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
2165 static struct nfs4_client
*
2166 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
2168 lockdep_assert_held(&nn
->client_lock
);
2169 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
2173 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
2175 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
2176 struct sockaddr
*sa
= svc_addr(rqstp
);
2177 u32 scopeid
= rpc_get_scope_id(sa
);
2178 unsigned short expected_family
;
2180 /* Currently, we only support tcp and tcp6 for the callback channel */
2181 if (se
->se_callback_netid_len
== 3 &&
2182 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
2183 expected_family
= AF_INET
;
2184 else if (se
->se_callback_netid_len
== 4 &&
2185 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
2186 expected_family
= AF_INET6
;
2190 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
2191 se
->se_callback_addr_len
,
2192 (struct sockaddr
*)&conn
->cb_addr
,
2193 sizeof(conn
->cb_addr
));
2195 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
2198 if (conn
->cb_addr
.ss_family
== AF_INET6
)
2199 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
2201 conn
->cb_prog
= se
->se_callback_prog
;
2202 conn
->cb_ident
= se
->se_callback_ident
;
2203 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
2206 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
2207 conn
->cb_addrlen
= 0;
2208 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
2209 "will not receive delegations\n",
2210 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
2216 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2219 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
2221 struct xdr_buf
*buf
= resp
->xdr
.buf
;
2222 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2225 dprintk("--> %s slot %p\n", __func__
, slot
);
2227 slot
->sl_opcnt
= resp
->opcnt
;
2228 slot
->sl_status
= resp
->cstate
.status
;
2230 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
2231 if (nfsd4_not_cached(resp
)) {
2232 slot
->sl_datalen
= 0;
2235 base
= resp
->cstate
.data_offset
;
2236 slot
->sl_datalen
= buf
->len
- base
;
2237 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
2238 WARN(1, "%s: sessions DRC could not cache compound\n",
2244 * Encode the replay sequence operation from the slot values.
2245 * If cachethis is FALSE encode the uncached rep error on the next
2246 * operation which sets resp->p and increments resp->opcnt for
2247 * nfs4svc_encode_compoundres.
2251 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
2252 struct nfsd4_compoundres
*resp
)
2254 struct nfsd4_op
*op
;
2255 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2257 /* Encode the replayed sequence operation */
2258 op
= &args
->ops
[resp
->opcnt
- 1];
2259 nfsd4_encode_operation(resp
, op
);
2261 /* Return nfserr_retry_uncached_rep in next operation. */
2262 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
2263 op
= &args
->ops
[resp
->opcnt
++];
2264 op
->status
= nfserr_retry_uncached_rep
;
2265 nfsd4_encode_operation(resp
, op
);
2271 * The sequence operation is not cached because we can use the slot and
2275 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
2276 struct nfsd4_sequence
*seq
)
2278 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
2279 struct xdr_stream
*xdr
= &resp
->xdr
;
2283 dprintk("--> %s slot %p\n", __func__
, slot
);
2285 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
2289 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
2292 return nfserr_serverfault
;
2294 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
2295 xdr_commit_encode(xdr
);
2297 resp
->opcnt
= slot
->sl_opcnt
;
2298 return slot
->sl_status
;
2302 * Set the exchange_id flags returned by the server.
2305 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
2307 #ifdef CONFIG_NFSD_PNFS
2308 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_PNFS_MDS
;
2310 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
2313 /* Referrals are supported, Migration is not. */
2314 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
2316 /* set the wire flags to return to client. */
2317 clid
->flags
= new->cl_exchange_flags
;
2320 static bool client_has_openowners(struct nfs4_client
*clp
)
2322 struct nfs4_openowner
*oo
;
2324 list_for_each_entry(oo
, &clp
->cl_openowners
, oo_perclient
) {
2325 if (!list_empty(&oo
->oo_owner
.so_stateids
))
2331 static bool client_has_state(struct nfs4_client
*clp
)
2333 return client_has_openowners(clp
)
2334 #ifdef CONFIG_NFSD_PNFS
2335 || !list_empty(&clp
->cl_lo_states
)
2337 || !list_empty(&clp
->cl_delegations
)
2338 || !list_empty(&clp
->cl_sessions
);
2342 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
2343 struct nfsd4_compound_state
*cstate
,
2344 struct nfsd4_exchange_id
*exid
)
2346 struct nfs4_client
*conf
, *new;
2347 struct nfs4_client
*unconf
= NULL
;
2349 char addr_str
[INET6_ADDRSTRLEN
];
2350 nfs4_verifier verf
= exid
->verifier
;
2351 struct sockaddr
*sa
= svc_addr(rqstp
);
2352 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
2353 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2355 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
2356 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2357 "ip_addr=%s flags %x, spa_how %d\n",
2358 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
2359 addr_str
, exid
->flags
, exid
->spa_how
);
2361 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
2362 return nfserr_inval
;
2364 new = create_client(exid
->clname
, rqstp
, &verf
);
2366 return nfserr_jukebox
;
2368 switch (exid
->spa_how
) {
2370 exid
->spo_must_enforce
[0] = 0;
2371 exid
->spo_must_enforce
[1] = (
2372 1 << (OP_BIND_CONN_TO_SESSION
- 32) |
2373 1 << (OP_EXCHANGE_ID
- 32) |
2374 1 << (OP_CREATE_SESSION
- 32) |
2375 1 << (OP_DESTROY_SESSION
- 32) |
2376 1 << (OP_DESTROY_CLIENTID
- 32));
2378 exid
->spo_must_allow
[0] &= (1 << (OP_CLOSE
) |
2379 1 << (OP_OPEN_DOWNGRADE
) |
2381 1 << (OP_DELEGRETURN
));
2383 exid
->spo_must_allow
[1] &= (
2384 1 << (OP_TEST_STATEID
- 32) |
2385 1 << (OP_FREE_STATEID
- 32));
2386 if (!svc_rqst_integrity_protected(rqstp
)) {
2387 status
= nfserr_inval
;
2391 * Sometimes userspace doesn't give us a principal.
2392 * Which is a bug, really. Anyway, we can't enforce
2393 * MACH_CRED in that case, better to give up now:
2395 if (!new->cl_cred
.cr_principal
&&
2396 !new->cl_cred
.cr_raw_principal
) {
2397 status
= nfserr_serverfault
;
2400 new->cl_mach_cred
= true;
2403 default: /* checked by xdr code */
2406 status
= nfserr_encr_alg_unsupp
;
2410 /* Cases below refer to rfc 5661 section 18.35.4: */
2411 spin_lock(&nn
->client_lock
);
2412 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
2414 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
2415 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
2418 if (!clp_used_exchangeid(conf
)) { /* buggy client */
2419 status
= nfserr_inval
;
2422 if (!nfsd4_mach_creds_match(conf
, rqstp
)) {
2423 status
= nfserr_wrong_cred
;
2426 if (!creds_match
) { /* case 9 */
2427 status
= nfserr_perm
;
2430 if (!verfs_match
) { /* case 8 */
2431 status
= nfserr_not_same
;
2435 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2438 if (!creds_match
) { /* case 3 */
2439 if (client_has_state(conf
)) {
2440 status
= nfserr_clid_inuse
;
2445 if (verfs_match
) { /* case 2 */
2446 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
2449 /* case 5, client reboot */
2454 if (update
) { /* case 7 */
2455 status
= nfserr_noent
;
2459 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
2460 if (unconf
) /* case 4, possible retry or client restart */
2461 unhash_client_locked(unconf
);
2463 /* case 1 (normal case) */
2466 status
= mark_client_expired_locked(conf
);
2470 new->cl_minorversion
= cstate
->minorversion
;
2471 new->cl_spo_must_allow
.u
.words
[0] = exid
->spo_must_allow
[0];
2472 new->cl_spo_must_allow
.u
.words
[1] = exid
->spo_must_allow
[1];
2475 add_to_unconfirmed(new);
2478 exid
->clientid
.cl_boot
= conf
->cl_clientid
.cl_boot
;
2479 exid
->clientid
.cl_id
= conf
->cl_clientid
.cl_id
;
2481 exid
->seqid
= conf
->cl_cs_slot
.sl_seqid
+ 1;
2482 nfsd4_set_ex_flags(conf
, exid
);
2484 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2485 conf
->cl_cs_slot
.sl_seqid
, conf
->cl_exchange_flags
);
2489 spin_unlock(&nn
->client_lock
);
2494 expire_client(unconf
);
2499 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
2501 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
2504 /* The slot is in use, and no response has been sent. */
2506 if (seqid
== slot_seqid
)
2507 return nfserr_jukebox
;
2509 return nfserr_seq_misordered
;
2511 /* Note unsigned 32-bit arithmetic handles wraparound: */
2512 if (likely(seqid
== slot_seqid
+ 1))
2514 if (seqid
== slot_seqid
)
2515 return nfserr_replay_cache
;
2516 return nfserr_seq_misordered
;
2520 * Cache the create session result into the create session single DRC
2521 * slot cache by saving the xdr structure. sl_seqid has been set.
2522 * Do this for solo or embedded create session operations.
2525 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
2526 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
2528 slot
->sl_status
= nfserr
;
2529 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
2533 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
2534 struct nfsd4_clid_slot
*slot
)
2536 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
2537 return slot
->sl_status
;
2540 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2541 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2542 1 + /* MIN tag is length with zero, only length */ \
2543 3 + /* version, opcount, opcode */ \
2544 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2545 /* seqid, slotID, slotID, cache */ \
2546 4 ) * sizeof(__be32))
2548 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2549 2 + /* verifier: AUTH_NULL, length 0 */\
2551 1 + /* MIN tag is length with zero, only length */ \
2552 3 + /* opcount, opcode, opstatus*/ \
2553 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2554 /* seqid, slotID, slotID, slotID, status */ \
2555 5 ) * sizeof(__be32))
2557 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
2559 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
2561 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
2562 return nfserr_toosmall
;
2563 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
2564 return nfserr_toosmall
;
2565 ca
->headerpadsz
= 0;
2566 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
2567 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
2568 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
2569 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
2570 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
2571 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
2573 * Note decreasing slot size below client's request may make it
2574 * difficult for client to function correctly, whereas
2575 * decreasing the number of slots will (just?) affect
2576 * performance. When short on memory we therefore prefer to
2577 * decrease number of slots instead of their size. Clients that
2578 * request larger slots than they need will get poor results:
2580 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2582 return nfserr_jukebox
;
2588 * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
2589 * These are based on similar macros in linux/sunrpc/msg_prot.h .
2591 #define RPC_MAX_HEADER_WITH_AUTH_SYS \
2592 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2594 #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2595 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2597 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2598 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
2599 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2600 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2603 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2605 ca
->headerpadsz
= 0;
2607 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2608 return nfserr_toosmall
;
2609 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2610 return nfserr_toosmall
;
2611 ca
->maxresp_cached
= 0;
2613 return nfserr_toosmall
;
2618 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2620 switch (cbs
->flavor
) {
2626 * GSS case: the spec doesn't allow us to return this
2627 * error. But it also doesn't allow us not to support
2629 * I'd rather this fail hard than return some error the
2630 * client might think it can already handle:
2632 return nfserr_encr_alg_unsupp
;
2637 nfsd4_create_session(struct svc_rqst
*rqstp
,
2638 struct nfsd4_compound_state
*cstate
,
2639 struct nfsd4_create_session
*cr_ses
)
2641 struct sockaddr
*sa
= svc_addr(rqstp
);
2642 struct nfs4_client
*conf
, *unconf
;
2643 struct nfs4_client
*old
= NULL
;
2644 struct nfsd4_session
*new;
2645 struct nfsd4_conn
*conn
;
2646 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2648 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2650 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2651 return nfserr_inval
;
2652 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2655 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2658 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2660 goto out_release_drc_mem
;
2661 status
= nfserr_jukebox
;
2662 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2664 goto out_release_drc_mem
;
2665 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2667 goto out_free_session
;
2669 spin_lock(&nn
->client_lock
);
2670 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2671 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2672 WARN_ON_ONCE(conf
&& unconf
);
2675 status
= nfserr_wrong_cred
;
2676 if (!nfsd4_mach_creds_match(conf
, rqstp
))
2678 cs_slot
= &conf
->cl_cs_slot
;
2679 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2681 if (status
== nfserr_replay_cache
)
2682 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2685 } else if (unconf
) {
2686 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2687 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2688 status
= nfserr_clid_inuse
;
2691 status
= nfserr_wrong_cred
;
2692 if (!nfsd4_mach_creds_match(unconf
, rqstp
))
2694 cs_slot
= &unconf
->cl_cs_slot
;
2695 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2697 /* an unconfirmed replay returns misordered */
2698 status
= nfserr_seq_misordered
;
2701 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2703 status
= mark_client_expired_locked(old
);
2709 move_to_confirmed(unconf
);
2712 status
= nfserr_stale_clientid
;
2716 /* Persistent sessions are not supported */
2717 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2718 /* Upshifting from TCP to RDMA is not supported */
2719 cr_ses
->flags
&= ~SESSION4_RDMA
;
2721 init_session(rqstp
, new, conf
, cr_ses
);
2722 nfsd4_get_session_locked(new);
2724 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2725 NFS4_MAX_SESSIONID_LEN
);
2726 cs_slot
->sl_seqid
++;
2727 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2729 /* cache solo and embedded create sessions under the client_lock */
2730 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2731 spin_unlock(&nn
->client_lock
);
2732 /* init connection and backchannel */
2733 nfsd4_init_conn(rqstp
, conn
, new);
2734 nfsd4_put_session(new);
2739 spin_unlock(&nn
->client_lock
);
2744 __free_session(new);
2745 out_release_drc_mem
:
2746 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2750 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2753 case NFS4_CDFC4_FORE
:
2754 case NFS4_CDFC4_BACK
:
2756 case NFS4_CDFC4_FORE_OR_BOTH
:
2757 case NFS4_CDFC4_BACK_OR_BOTH
:
2758 *dir
= NFS4_CDFC4_BOTH
;
2761 return nfserr_inval
;
2764 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2766 struct nfsd4_session
*session
= cstate
->session
;
2767 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2770 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2773 spin_lock(&nn
->client_lock
);
2774 session
->se_cb_prog
= bc
->bc_cb_program
;
2775 session
->se_cb_sec
= bc
->bc_cb_sec
;
2776 spin_unlock(&nn
->client_lock
);
2778 nfsd4_probe_callback(session
->se_client
);
2783 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2784 struct nfsd4_compound_state
*cstate
,
2785 struct nfsd4_bind_conn_to_session
*bcts
)
2788 struct nfsd4_conn
*conn
;
2789 struct nfsd4_session
*session
;
2790 struct net
*net
= SVC_NET(rqstp
);
2791 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2793 if (!nfsd4_last_compound_op(rqstp
))
2794 return nfserr_not_only_op
;
2795 spin_lock(&nn
->client_lock
);
2796 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2797 spin_unlock(&nn
->client_lock
);
2799 goto out_no_session
;
2800 status
= nfserr_wrong_cred
;
2801 if (!nfsd4_mach_creds_match(session
->se_client
, rqstp
))
2803 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2806 conn
= alloc_conn(rqstp
, bcts
->dir
);
2807 status
= nfserr_jukebox
;
2810 nfsd4_init_conn(rqstp
, conn
, session
);
2813 nfsd4_put_session(session
);
2818 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2822 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2826 nfsd4_destroy_session(struct svc_rqst
*r
,
2827 struct nfsd4_compound_state
*cstate
,
2828 struct nfsd4_destroy_session
*sessionid
)
2830 struct nfsd4_session
*ses
;
2832 int ref_held_by_me
= 0;
2833 struct net
*net
= SVC_NET(r
);
2834 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2836 status
= nfserr_not_only_op
;
2837 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2838 if (!nfsd4_last_compound_op(r
))
2842 dump_sessionid(__func__
, &sessionid
->sessionid
);
2843 spin_lock(&nn
->client_lock
);
2844 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2846 goto out_client_lock
;
2847 status
= nfserr_wrong_cred
;
2848 if (!nfsd4_mach_creds_match(ses
->se_client
, r
))
2849 goto out_put_session
;
2850 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2852 goto out_put_session
;
2853 unhash_session(ses
);
2854 spin_unlock(&nn
->client_lock
);
2856 nfsd4_probe_callback_sync(ses
->se_client
);
2858 spin_lock(&nn
->client_lock
);
2861 nfsd4_put_session_locked(ses
);
2863 spin_unlock(&nn
->client_lock
);
2868 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2870 struct nfsd4_conn
*c
;
2872 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2873 if (c
->cn_xprt
== xpt
) {
2880 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2882 struct nfs4_client
*clp
= ses
->se_client
;
2883 struct nfsd4_conn
*c
;
2884 __be32 status
= nfs_ok
;
2887 spin_lock(&clp
->cl_lock
);
2888 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2891 status
= nfserr_conn_not_bound_to_session
;
2892 if (clp
->cl_mach_cred
)
2894 __nfsd4_hash_conn(new, ses
);
2895 spin_unlock(&clp
->cl_lock
);
2896 ret
= nfsd4_register_conn(new);
2898 /* oops; xprt is already down: */
2899 nfsd4_conn_lost(&new->cn_xpt_user
);
2902 spin_unlock(&clp
->cl_lock
);
2907 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2909 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2911 return args
->opcnt
> session
->se_fchannel
.maxops
;
2914 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2915 struct nfsd4_session
*session
)
2917 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2919 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2923 nfsd4_sequence(struct svc_rqst
*rqstp
,
2924 struct nfsd4_compound_state
*cstate
,
2925 struct nfsd4_sequence
*seq
)
2927 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2928 struct xdr_stream
*xdr
= &resp
->xdr
;
2929 struct nfsd4_session
*session
;
2930 struct nfs4_client
*clp
;
2931 struct nfsd4_slot
*slot
;
2932 struct nfsd4_conn
*conn
;
2935 struct net
*net
= SVC_NET(rqstp
);
2936 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2938 if (resp
->opcnt
!= 1)
2939 return nfserr_sequence_pos
;
2942 * Will be either used or freed by nfsd4_sequence_check_conn
2945 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2947 return nfserr_jukebox
;
2949 spin_lock(&nn
->client_lock
);
2950 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
2952 goto out_no_session
;
2953 clp
= session
->se_client
;
2955 status
= nfserr_too_many_ops
;
2956 if (nfsd4_session_too_many_ops(rqstp
, session
))
2957 goto out_put_session
;
2959 status
= nfserr_req_too_big
;
2960 if (nfsd4_request_too_big(rqstp
, session
))
2961 goto out_put_session
;
2963 status
= nfserr_badslot
;
2964 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2965 goto out_put_session
;
2967 slot
= session
->se_slots
[seq
->slotid
];
2968 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2970 /* We do not negotiate the number of slots yet, so set the
2971 * maxslots to the session maxreqs which is used to encode
2972 * sr_highest_slotid and the sr_target_slot id to maxslots */
2973 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2975 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2976 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2977 if (status
== nfserr_replay_cache
) {
2978 status
= nfserr_seq_misordered
;
2979 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2980 goto out_put_session
;
2981 cstate
->slot
= slot
;
2982 cstate
->session
= session
;
2984 /* Return the cached reply status and set cstate->status
2985 * for nfsd4_proc_compound processing */
2986 status
= nfsd4_replay_cache_entry(resp
, seq
);
2987 cstate
->status
= nfserr_replay_cache
;
2991 goto out_put_session
;
2993 status
= nfsd4_sequence_check_conn(conn
, session
);
2996 goto out_put_session
;
2998 buflen
= (seq
->cachethis
) ?
2999 session
->se_fchannel
.maxresp_cached
:
3000 session
->se_fchannel
.maxresp_sz
;
3001 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
3003 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
3004 goto out_put_session
;
3005 svc_reserve(rqstp
, buflen
);
3008 /* Success! bump slot seqid */
3009 slot
->sl_seqid
= seq
->seqid
;
3010 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
3012 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
3014 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
3016 cstate
->slot
= slot
;
3017 cstate
->session
= session
;
3021 switch (clp
->cl_cb_state
) {
3023 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
3025 case NFSD4_CB_FAULT
:
3026 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
3029 seq
->status_flags
= 0;
3031 if (!list_empty(&clp
->cl_revoked
))
3032 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
3036 spin_unlock(&nn
->client_lock
);
3039 nfsd4_put_session_locked(session
);
3040 goto out_no_session
;
3044 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
3046 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
3048 if (nfsd4_has_session(cs
)) {
3049 if (cs
->status
!= nfserr_replay_cache
) {
3050 nfsd4_store_cache_entry(resp
);
3051 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
3053 /* Drop session reference that was taken in nfsd4_sequence() */
3054 nfsd4_put_session(cs
->session
);
3056 put_client_renew(cs
->clp
);
3060 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
3062 struct nfs4_client
*conf
, *unconf
;
3063 struct nfs4_client
*clp
= NULL
;
3065 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3067 spin_lock(&nn
->client_lock
);
3068 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
3069 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
3070 WARN_ON_ONCE(conf
&& unconf
);
3073 if (client_has_state(conf
)) {
3074 status
= nfserr_clientid_busy
;
3077 status
= mark_client_expired_locked(conf
);
3084 status
= nfserr_stale_clientid
;
3087 if (!nfsd4_mach_creds_match(clp
, rqstp
)) {
3089 status
= nfserr_wrong_cred
;
3092 unhash_client_locked(clp
);
3094 spin_unlock(&nn
->client_lock
);
3101 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
3105 if (rc
->rca_one_fs
) {
3106 if (!cstate
->current_fh
.fh_dentry
)
3107 return nfserr_nofilehandle
;
3109 * We don't take advantage of the rca_one_fs case.
3110 * That's OK, it's optional, we can safely ignore it.
3115 status
= nfserr_complete_already
;
3116 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
3117 &cstate
->session
->se_client
->cl_flags
))
3120 status
= nfserr_stale_clientid
;
3121 if (is_client_expired(cstate
->session
->se_client
))
3123 * The following error isn't really legal.
3124 * But we only get here if the client just explicitly
3125 * destroyed the client. Surely it no longer cares what
3126 * error it gets back on an operation for the dead
3132 nfsd4_client_record_create(cstate
->session
->se_client
);
3138 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3139 struct nfsd4_setclientid
*setclid
)
3141 struct xdr_netobj clname
= setclid
->se_name
;
3142 nfs4_verifier clverifier
= setclid
->se_verf
;
3143 struct nfs4_client
*conf
, *new;
3144 struct nfs4_client
*unconf
= NULL
;
3146 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3148 new = create_client(clname
, rqstp
, &clverifier
);
3150 return nfserr_jukebox
;
3151 /* Cases below refer to rfc 3530 section 14.2.33: */
3152 spin_lock(&nn
->client_lock
);
3153 conf
= find_confirmed_client_by_name(&clname
, nn
);
3154 if (conf
&& client_has_state(conf
)) {
3156 status
= nfserr_clid_inuse
;
3157 if (clp_used_exchangeid(conf
))
3159 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
3160 char addr_str
[INET6_ADDRSTRLEN
];
3161 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
3163 dprintk("NFSD: setclientid: string in use by client "
3164 "at %s\n", addr_str
);
3168 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
3170 unhash_client_locked(unconf
);
3171 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
)) {
3172 /* case 1: probable callback update */
3173 copy_clid(new, conf
);
3174 gen_confirm(new, nn
);
3175 } else /* case 4 (new client) or cases 2, 3 (client reboot): */
3177 new->cl_minorversion
= 0;
3178 gen_callback(new, setclid
, rqstp
);
3179 add_to_unconfirmed(new);
3180 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
3181 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
3182 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
3186 spin_unlock(&nn
->client_lock
);
3190 expire_client(unconf
);
3196 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
3197 struct nfsd4_compound_state
*cstate
,
3198 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
3200 struct nfs4_client
*conf
, *unconf
;
3201 struct nfs4_client
*old
= NULL
;
3202 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
3203 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
3205 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3207 if (STALE_CLIENTID(clid
, nn
))
3208 return nfserr_stale_clientid
;
3210 spin_lock(&nn
->client_lock
);
3211 conf
= find_confirmed_client(clid
, false, nn
);
3212 unconf
= find_unconfirmed_client(clid
, false, nn
);
3214 * We try hard to give out unique clientid's, so if we get an
3215 * attempt to confirm the same clientid with a different cred,
3216 * the client may be buggy; this should never happen.
3218 * Nevertheless, RFC 7530 recommends INUSE for this case:
3220 status
= nfserr_clid_inuse
;
3221 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
3223 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
3225 /* cases below refer to rfc 3530 section 14.2.34: */
3226 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
3227 if (conf
&& !unconf
) /* case 2: probable retransmit */
3229 else /* case 4: client hasn't noticed we rebooted yet? */
3230 status
= nfserr_stale_clientid
;
3234 if (conf
) { /* case 1: callback update */
3236 unhash_client_locked(old
);
3237 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
3238 } else { /* case 3: normal case; new or rebooted client */
3239 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
3241 status
= nfserr_clid_inuse
;
3242 if (client_has_state(old
)
3243 && !same_creds(&unconf
->cl_cred
,
3246 status
= mark_client_expired_locked(old
);
3252 move_to_confirmed(unconf
);
3255 get_client_locked(conf
);
3256 spin_unlock(&nn
->client_lock
);
3257 nfsd4_probe_callback(conf
);
3258 spin_lock(&nn
->client_lock
);
3259 put_client_renew_locked(conf
);
3261 spin_unlock(&nn
->client_lock
);
3267 static struct nfs4_file
*nfsd4_alloc_file(void)
3269 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
3272 /* OPEN Share state helper functions */
3273 static void nfsd4_init_file(struct knfsd_fh
*fh
, unsigned int hashval
,
3274 struct nfs4_file
*fp
)
3276 lockdep_assert_held(&state_lock
);
3278 atomic_set(&fp
->fi_ref
, 1);
3279 spin_lock_init(&fp
->fi_lock
);
3280 INIT_LIST_HEAD(&fp
->fi_stateids
);
3281 INIT_LIST_HEAD(&fp
->fi_delegations
);
3282 INIT_LIST_HEAD(&fp
->fi_clnt_odstate
);
3283 fh_copy_shallow(&fp
->fi_fhandle
, fh
);
3284 fp
->fi_deleg_file
= NULL
;
3285 fp
->fi_had_conflict
= false;
3286 fp
->fi_share_deny
= 0;
3287 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
3288 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
3289 #ifdef CONFIG_NFSD_PNFS
3290 INIT_LIST_HEAD(&fp
->fi_lo_states
);
3291 atomic_set(&fp
->fi_lo_recalls
, 0);
3293 hlist_add_head_rcu(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
3297 nfsd4_free_slabs(void)
3299 kmem_cache_destroy(odstate_slab
);
3300 kmem_cache_destroy(openowner_slab
);
3301 kmem_cache_destroy(lockowner_slab
);
3302 kmem_cache_destroy(file_slab
);
3303 kmem_cache_destroy(stateid_slab
);
3304 kmem_cache_destroy(deleg_slab
);
3308 nfsd4_init_slabs(void)
3310 openowner_slab
= kmem_cache_create("nfsd4_openowners",
3311 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
3312 if (openowner_slab
== NULL
)
3314 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
3315 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
3316 if (lockowner_slab
== NULL
)
3317 goto out_free_openowner_slab
;
3318 file_slab
= kmem_cache_create("nfsd4_files",
3319 sizeof(struct nfs4_file
), 0, 0, NULL
);
3320 if (file_slab
== NULL
)
3321 goto out_free_lockowner_slab
;
3322 stateid_slab
= kmem_cache_create("nfsd4_stateids",
3323 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
3324 if (stateid_slab
== NULL
)
3325 goto out_free_file_slab
;
3326 deleg_slab
= kmem_cache_create("nfsd4_delegations",
3327 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
3328 if (deleg_slab
== NULL
)
3329 goto out_free_stateid_slab
;
3330 odstate_slab
= kmem_cache_create("nfsd4_odstate",
3331 sizeof(struct nfs4_clnt_odstate
), 0, 0, NULL
);
3332 if (odstate_slab
== NULL
)
3333 goto out_free_deleg_slab
;
3336 out_free_deleg_slab
:
3337 kmem_cache_destroy(deleg_slab
);
3338 out_free_stateid_slab
:
3339 kmem_cache_destroy(stateid_slab
);
3341 kmem_cache_destroy(file_slab
);
3342 out_free_lockowner_slab
:
3343 kmem_cache_destroy(lockowner_slab
);
3344 out_free_openowner_slab
:
3345 kmem_cache_destroy(openowner_slab
);
3347 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3351 static void init_nfs4_replay(struct nfs4_replay
*rp
)
3353 rp
->rp_status
= nfserr_serverfault
;
3355 rp
->rp_buf
= rp
->rp_ibuf
;
3356 mutex_init(&rp
->rp_mutex
);
3359 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state
*cstate
,
3360 struct nfs4_stateowner
*so
)
3362 if (!nfsd4_has_session(cstate
)) {
3363 mutex_lock(&so
->so_replay
.rp_mutex
);
3364 cstate
->replay_owner
= nfs4_get_stateowner(so
);
3368 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state
*cstate
)
3370 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
3373 cstate
->replay_owner
= NULL
;
3374 mutex_unlock(&so
->so_replay
.rp_mutex
);
3375 nfs4_put_stateowner(so
);
3379 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
3381 struct nfs4_stateowner
*sop
;
3383 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
3387 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
3388 if (!sop
->so_owner
.data
) {
3389 kmem_cache_free(slab
, sop
);
3392 sop
->so_owner
.len
= owner
->len
;
3394 INIT_LIST_HEAD(&sop
->so_stateids
);
3395 sop
->so_client
= clp
;
3396 init_nfs4_replay(&sop
->so_replay
);
3397 atomic_set(&sop
->so_count
, 1);
3401 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
3403 lockdep_assert_held(&clp
->cl_lock
);
3405 list_add(&oo
->oo_owner
.so_strhash
,
3406 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
3407 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
3410 static void nfs4_unhash_openowner(struct nfs4_stateowner
*so
)
3412 unhash_openowner_locked(openowner(so
));
3415 static void nfs4_free_openowner(struct nfs4_stateowner
*so
)
3417 struct nfs4_openowner
*oo
= openowner(so
);
3419 kmem_cache_free(openowner_slab
, oo
);
3422 static const struct nfs4_stateowner_operations openowner_ops
= {
3423 .so_unhash
= nfs4_unhash_openowner
,
3424 .so_free
= nfs4_free_openowner
,
3427 static struct nfs4_ol_stateid
*
3428 nfsd4_find_existing_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3430 struct nfs4_ol_stateid
*local
, *ret
= NULL
;
3431 struct nfs4_openowner
*oo
= open
->op_openowner
;
3433 lockdep_assert_held(&fp
->fi_lock
);
3435 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3436 /* ignore lock owners */
3437 if (local
->st_stateowner
->so_is_open_owner
== 0)
3439 if (local
->st_stateowner
== &oo
->oo_owner
) {
3441 atomic_inc(&ret
->st_stid
.sc_count
);
3448 static struct nfs4_openowner
*
3449 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
3450 struct nfsd4_compound_state
*cstate
)
3452 struct nfs4_client
*clp
= cstate
->clp
;
3453 struct nfs4_openowner
*oo
, *ret
;
3455 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
3458 oo
->oo_owner
.so_ops
= &openowner_ops
;
3459 oo
->oo_owner
.so_is_open_owner
= 1;
3460 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
3462 if (nfsd4_has_session(cstate
))
3463 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3465 oo
->oo_last_closed_stid
= NULL
;
3466 INIT_LIST_HEAD(&oo
->oo_close_lru
);
3467 spin_lock(&clp
->cl_lock
);
3468 ret
= find_openstateowner_str_locked(strhashval
, open
, clp
);
3470 hash_openowner(oo
, clp
, strhashval
);
3473 nfs4_free_stateowner(&oo
->oo_owner
);
3475 spin_unlock(&clp
->cl_lock
);
3479 static struct nfs4_ol_stateid
*
3480 init_open_stateid(struct nfs4_file
*fp
, struct nfsd4_open
*open
)
3483 struct nfs4_openowner
*oo
= open
->op_openowner
;
3484 struct nfs4_ol_stateid
*retstp
= NULL
;
3485 struct nfs4_ol_stateid
*stp
;
3488 /* We are moving these outside of the spinlocks to avoid the warnings */
3489 mutex_init(&stp
->st_mutex
);
3490 mutex_lock(&stp
->st_mutex
);
3492 spin_lock(&oo
->oo_owner
.so_client
->cl_lock
);
3493 spin_lock(&fp
->fi_lock
);
3495 retstp
= nfsd4_find_existing_open(fp
, open
);
3499 open
->op_stp
= NULL
;
3500 atomic_inc(&stp
->st_stid
.sc_count
);
3501 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
3502 INIT_LIST_HEAD(&stp
->st_locks
);
3503 stp
->st_stateowner
= nfs4_get_stateowner(&oo
->oo_owner
);
3505 stp
->st_stid
.sc_file
= fp
;
3506 stp
->st_access_bmap
= 0;
3507 stp
->st_deny_bmap
= 0;
3508 stp
->st_openstp
= NULL
;
3509 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
3510 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3513 spin_unlock(&fp
->fi_lock
);
3514 spin_unlock(&oo
->oo_owner
.so_client
->cl_lock
);
3516 mutex_lock(&retstp
->st_mutex
);
3517 /* To keep mutex tracking happy */
3518 mutex_unlock(&stp
->st_mutex
);
3525 * In the 4.0 case we need to keep the owners around a little while to handle
3526 * CLOSE replay. We still do need to release any file access that is held by
3527 * them before returning however.
3530 move_to_close_lru(struct nfs4_ol_stateid
*s
, struct net
*net
)
3532 struct nfs4_ol_stateid
*last
;
3533 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
3534 struct nfsd_net
*nn
= net_generic(s
->st_stid
.sc_client
->net
,
3537 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
3540 * We know that we hold one reference via nfsd4_close, and another
3541 * "persistent" reference for the client. If the refcount is higher
3542 * than 2, then there are still calls in progress that are using this
3543 * stateid. We can't put the sc_file reference until they are finished.
3544 * Wait for the refcount to drop to 2. Since it has been unhashed,
3545 * there should be no danger of the refcount going back up again at
3548 wait_event(close_wq
, atomic_read(&s
->st_stid
.sc_count
) == 2);
3550 release_all_access(s
);
3551 if (s
->st_stid
.sc_file
) {
3552 put_nfs4_file(s
->st_stid
.sc_file
);
3553 s
->st_stid
.sc_file
= NULL
;
3556 spin_lock(&nn
->client_lock
);
3557 last
= oo
->oo_last_closed_stid
;
3558 oo
->oo_last_closed_stid
= s
;
3559 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
3560 oo
->oo_time
= get_seconds();
3561 spin_unlock(&nn
->client_lock
);
3563 nfs4_put_stid(&last
->st_stid
);
3566 /* search file_hashtbl[] for file */
3567 static struct nfs4_file
*
3568 find_file_locked(struct knfsd_fh
*fh
, unsigned int hashval
)
3570 struct nfs4_file
*fp
;
3572 hlist_for_each_entry_rcu(fp
, &file_hashtbl
[hashval
], fi_hash
) {
3573 if (fh_match(&fp
->fi_fhandle
, fh
)) {
3574 if (atomic_inc_not_zero(&fp
->fi_ref
))
3582 find_file(struct knfsd_fh
*fh
)
3584 struct nfs4_file
*fp
;
3585 unsigned int hashval
= file_hashval(fh
);
3588 fp
= find_file_locked(fh
, hashval
);
3593 static struct nfs4_file
*
3594 find_or_add_file(struct nfs4_file
*new, struct knfsd_fh
*fh
)
3596 struct nfs4_file
*fp
;
3597 unsigned int hashval
= file_hashval(fh
);
3600 fp
= find_file_locked(fh
, hashval
);
3605 spin_lock(&state_lock
);
3606 fp
= find_file_locked(fh
, hashval
);
3607 if (likely(fp
== NULL
)) {
3608 nfsd4_init_file(fh
, hashval
, new);
3611 spin_unlock(&state_lock
);
3617 * Called to check deny when READ with all zero stateid or
3618 * WRITE with all zero or all one stateid
3621 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
3623 struct nfs4_file
*fp
;
3624 __be32 ret
= nfs_ok
;
3626 fp
= find_file(¤t_fh
->fh_handle
);
3629 /* Check for conflicting share reservations */
3630 spin_lock(&fp
->fi_lock
);
3631 if (fp
->fi_share_deny
& deny_type
)
3632 ret
= nfserr_locked
;
3633 spin_unlock(&fp
->fi_lock
);
3638 static void nfsd4_cb_recall_prepare(struct nfsd4_callback
*cb
)
3640 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3641 struct nfsd_net
*nn
= net_generic(dp
->dl_stid
.sc_client
->net
,
3644 block_delegations(&dp
->dl_stid
.sc_file
->fi_fhandle
);
3647 * We can't do this in nfsd_break_deleg_cb because it is
3648 * already holding inode->i_lock.
3650 * If the dl_time != 0, then we know that it has already been
3651 * queued for a lease break. Don't queue it again.
3653 spin_lock(&state_lock
);
3654 if (dp
->dl_time
== 0) {
3655 dp
->dl_time
= get_seconds();
3656 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
3658 spin_unlock(&state_lock
);
3661 static int nfsd4_cb_recall_done(struct nfsd4_callback
*cb
,
3662 struct rpc_task
*task
)
3664 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3666 if (dp
->dl_stid
.sc_type
== NFS4_CLOSED_DELEG_STID
)
3669 switch (task
->tk_status
) {
3673 case -NFS4ERR_BAD_STATEID
:
3675 * Race: client probably got cb_recall before open reply
3676 * granting delegation.
3678 if (dp
->dl_retries
--) {
3679 rpc_delay(task
, 2 * HZ
);
3688 static void nfsd4_cb_recall_release(struct nfsd4_callback
*cb
)
3690 struct nfs4_delegation
*dp
= cb_to_delegation(cb
);
3692 nfs4_put_stid(&dp
->dl_stid
);
3695 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops
= {
3696 .prepare
= nfsd4_cb_recall_prepare
,
3697 .done
= nfsd4_cb_recall_done
,
3698 .release
= nfsd4_cb_recall_release
,
3701 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
3704 * We're assuming the state code never drops its reference
3705 * without first removing the lease. Since we're in this lease
3706 * callback (and since the lease code is serialized by the kernel
3707 * lock) we know the server hasn't removed the lease yet, we know
3708 * it's safe to take a reference.
3710 atomic_inc(&dp
->dl_stid
.sc_count
);
3711 nfsd4_run_cb(&dp
->dl_recall
);
3714 /* Called from break_lease() with i_lock held. */
3716 nfsd_break_deleg_cb(struct file_lock
*fl
)
3719 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
3720 struct nfs4_delegation
*dp
;
3723 WARN(1, "(%p)->fl_owner NULL\n", fl
);
3726 if (fp
->fi_had_conflict
) {
3727 WARN(1, "duplicate break on %p\n", fp
);
3731 * We don't want the locks code to timeout the lease for us;
3732 * we'll remove it ourself if a delegation isn't returned
3735 fl
->fl_break_time
= 0;
3737 spin_lock(&fp
->fi_lock
);
3738 fp
->fi_had_conflict
= true;
3740 * If there are no delegations on the list, then return true
3741 * so that the lease code will go ahead and delete it.
3743 if (list_empty(&fp
->fi_delegations
))
3746 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
3747 nfsd_break_one_deleg(dp
);
3748 spin_unlock(&fp
->fi_lock
);
3753 nfsd_change_deleg_cb(struct file_lock
*onlist
, int arg
,
3754 struct list_head
*dispose
)
3757 return lease_modify(onlist
, arg
, dispose
);
3762 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
3763 .lm_break
= nfsd_break_deleg_cb
,
3764 .lm_change
= nfsd_change_deleg_cb
,
3767 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
3769 if (nfsd4_has_session(cstate
))
3771 if (seqid
== so
->so_seqid
- 1)
3772 return nfserr_replay_me
;
3773 if (seqid
== so
->so_seqid
)
3775 return nfserr_bad_seqid
;
3778 static __be32
lookup_clientid(clientid_t
*clid
,
3779 struct nfsd4_compound_state
*cstate
,
3780 struct nfsd_net
*nn
)
3782 struct nfs4_client
*found
;
3785 found
= cstate
->clp
;
3786 if (!same_clid(&found
->cl_clientid
, clid
))
3787 return nfserr_stale_clientid
;
3791 if (STALE_CLIENTID(clid
, nn
))
3792 return nfserr_stale_clientid
;
3795 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3796 * cached already then we know this is for is for v4.0 and "sessions"
3799 WARN_ON_ONCE(cstate
->session
);
3800 spin_lock(&nn
->client_lock
);
3801 found
= find_confirmed_client(clid
, false, nn
);
3803 spin_unlock(&nn
->client_lock
);
3804 return nfserr_expired
;
3806 atomic_inc(&found
->cl_refcount
);
3807 spin_unlock(&nn
->client_lock
);
3809 /* Cache the nfs4_client in cstate! */
3810 cstate
->clp
= found
;
3815 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3816 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3818 clientid_t
*clientid
= &open
->op_clientid
;
3819 struct nfs4_client
*clp
= NULL
;
3820 unsigned int strhashval
;
3821 struct nfs4_openowner
*oo
= NULL
;
3824 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3825 return nfserr_stale_clientid
;
3827 * In case we need it later, after we've already created the
3828 * file and don't want to risk a further failure:
3830 open
->op_file
= nfsd4_alloc_file();
3831 if (open
->op_file
== NULL
)
3832 return nfserr_jukebox
;
3834 status
= lookup_clientid(clientid
, cstate
, nn
);
3839 strhashval
= ownerstr_hashval(&open
->op_owner
);
3840 oo
= find_openstateowner_str(strhashval
, open
, clp
);
3841 open
->op_openowner
= oo
;
3845 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3846 /* Replace unconfirmed owners without checking for replay. */
3847 release_openowner(oo
);
3848 open
->op_openowner
= NULL
;
3851 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3856 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3858 return nfserr_jukebox
;
3859 open
->op_openowner
= oo
;
3861 open
->op_stp
= nfs4_alloc_open_stateid(clp
);
3863 return nfserr_jukebox
;
3865 if (nfsd4_has_session(cstate
) &&
3866 (cstate
->current_fh
.fh_export
->ex_flags
& NFSEXP_PNFS
)) {
3867 open
->op_odstate
= alloc_clnt_odstate(clp
);
3868 if (!open
->op_odstate
)
3869 return nfserr_jukebox
;
3875 static inline __be32
3876 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3878 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3879 return nfserr_openmode
;
3884 static int share_access_to_flags(u32 share_access
)
3886 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3889 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3891 struct nfs4_stid
*ret
;
3893 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3896 return delegstateid(ret
);
3899 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3901 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3902 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3906 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3907 struct nfs4_delegation
**dp
)
3910 __be32 status
= nfserr_bad_stateid
;
3911 struct nfs4_delegation
*deleg
;
3913 deleg
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3916 flags
= share_access_to_flags(open
->op_share_access
);
3917 status
= nfs4_check_delegmode(deleg
, flags
);
3919 nfs4_put_stid(&deleg
->dl_stid
);
3924 if (!nfsd4_is_deleg_cur(open
))
3928 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3932 static inline int nfs4_access_to_access(u32 nfs4_access
)
3936 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3937 flags
|= NFSD_MAY_READ
;
3938 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3939 flags
|= NFSD_MAY_WRITE
;
3943 static inline __be32
3944 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3945 struct nfsd4_open
*open
)
3947 struct iattr iattr
= {
3948 .ia_valid
= ATTR_SIZE
,
3951 if (!open
->op_truncate
)
3953 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3954 return nfserr_inval
;
3955 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3958 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3959 struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
,
3960 struct nfsd4_open
*open
)
3962 struct file
*filp
= NULL
;
3964 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3965 int access
= nfs4_access_to_access(open
->op_share_access
);
3966 unsigned char old_access_bmap
, old_deny_bmap
;
3968 spin_lock(&fp
->fi_lock
);
3971 * Are we trying to set a deny mode that would conflict with
3974 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
3975 if (status
!= nfs_ok
) {
3976 spin_unlock(&fp
->fi_lock
);
3980 /* set access to the file */
3981 status
= nfs4_file_get_access(fp
, open
->op_share_access
);
3982 if (status
!= nfs_ok
) {
3983 spin_unlock(&fp
->fi_lock
);
3987 /* Set access bits in stateid */
3988 old_access_bmap
= stp
->st_access_bmap
;
3989 set_access(open
->op_share_access
, stp
);
3991 /* Set new deny mask */
3992 old_deny_bmap
= stp
->st_deny_bmap
;
3993 set_deny(open
->op_share_deny
, stp
);
3994 fp
->fi_share_deny
|= (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
3996 if (!fp
->fi_fds
[oflag
]) {
3997 spin_unlock(&fp
->fi_lock
);
3998 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
, &filp
);
4000 goto out_put_access
;
4001 spin_lock(&fp
->fi_lock
);
4002 if (!fp
->fi_fds
[oflag
]) {
4003 fp
->fi_fds
[oflag
] = filp
;
4007 spin_unlock(&fp
->fi_lock
);
4011 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4013 goto out_put_access
;
4017 stp
->st_access_bmap
= old_access_bmap
;
4018 nfs4_file_put_access(fp
, open
->op_share_access
);
4019 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap
), stp
);
4024 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
)
4027 unsigned char old_deny_bmap
= stp
->st_deny_bmap
;
4029 if (!test_access(open
->op_share_access
, stp
))
4030 return nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, stp
, open
);
4032 /* test and set deny mode */
4033 spin_lock(&fp
->fi_lock
);
4034 status
= nfs4_file_check_deny(fp
, open
->op_share_deny
);
4035 if (status
== nfs_ok
) {
4036 set_deny(open
->op_share_deny
, stp
);
4037 fp
->fi_share_deny
|=
4038 (open
->op_share_deny
& NFS4_SHARE_DENY_BOTH
);
4040 spin_unlock(&fp
->fi_lock
);
4042 if (status
!= nfs_ok
)
4045 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
4046 if (status
!= nfs_ok
)
4047 reset_union_bmap_deny(old_deny_bmap
, stp
);
4051 /* Should we give out recallable state?: */
4052 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
4054 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
4057 * In the sessions case, since we don't have to establish a
4058 * separate connection for callbacks, we assume it's OK
4059 * until we hear otherwise:
4061 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
4064 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_file
*fp
, int flag
)
4066 struct file_lock
*fl
;
4068 fl
= locks_alloc_lock();
4071 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
4072 fl
->fl_flags
= FL_DELEG
;
4073 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
4074 fl
->fl_end
= OFFSET_MAX
;
4075 fl
->fl_owner
= (fl_owner_t
)fp
;
4076 fl
->fl_pid
= current
->tgid
;
4081 * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer
4082 * @dp: a pointer to the nfs4_delegation we're adding.
4085 * On success: Return code will be 0 on success.
4087 * On error: -EAGAIN if there was an existing delegation.
4088 * nonzero if there is an error in other cases.
4092 static int nfs4_setlease(struct nfs4_delegation
*dp
)
4094 struct nfs4_file
*fp
= dp
->dl_stid
.sc_file
;
4095 struct file_lock
*fl
;
4099 fl
= nfs4_alloc_init_lease(fp
, NFS4_OPEN_DELEGATE_READ
);
4102 filp
= find_readable_file(fp
);
4104 /* We should always have a readable file here */
4106 locks_free_lock(fl
);
4110 status
= vfs_setlease(filp
, fl
->fl_type
, &fl
, NULL
);
4112 locks_free_lock(fl
);
4115 spin_lock(&state_lock
);
4116 spin_lock(&fp
->fi_lock
);
4117 /* Did the lease get broken before we took the lock? */
4119 if (fp
->fi_had_conflict
)
4122 if (fp
->fi_deleg_file
) {
4123 status
= hash_delegation_locked(dp
, fp
);
4126 fp
->fi_deleg_file
= filp
;
4127 fp
->fi_delegees
= 0;
4128 status
= hash_delegation_locked(dp
, fp
);
4129 spin_unlock(&fp
->fi_lock
);
4130 spin_unlock(&state_lock
);
4132 /* Should never happen, this is a new fi_deleg_file */
4138 spin_unlock(&fp
->fi_lock
);
4139 spin_unlock(&state_lock
);
4145 static struct nfs4_delegation
*
4146 nfs4_set_delegation(struct nfs4_client
*clp
, struct svc_fh
*fh
,
4147 struct nfs4_file
*fp
, struct nfs4_clnt_odstate
*odstate
)
4150 struct nfs4_delegation
*dp
;
4152 if (fp
->fi_had_conflict
)
4153 return ERR_PTR(-EAGAIN
);
4155 spin_lock(&state_lock
);
4156 spin_lock(&fp
->fi_lock
);
4157 status
= nfs4_get_existing_delegation(clp
, fp
);
4158 spin_unlock(&fp
->fi_lock
);
4159 spin_unlock(&state_lock
);
4162 return ERR_PTR(status
);
4164 dp
= alloc_init_deleg(clp
, fh
, odstate
);
4166 return ERR_PTR(-ENOMEM
);
4169 spin_lock(&state_lock
);
4170 spin_lock(&fp
->fi_lock
);
4171 dp
->dl_stid
.sc_file
= fp
;
4172 if (!fp
->fi_deleg_file
) {
4173 spin_unlock(&fp
->fi_lock
);
4174 spin_unlock(&state_lock
);
4175 status
= nfs4_setlease(dp
);
4178 if (fp
->fi_had_conflict
) {
4182 status
= hash_delegation_locked(dp
, fp
);
4184 spin_unlock(&fp
->fi_lock
);
4185 spin_unlock(&state_lock
);
4188 put_clnt_odstate(dp
->dl_clnt_odstate
);
4189 nfs4_put_stid(&dp
->dl_stid
);
4190 return ERR_PTR(status
);
4195 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
4197 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4198 if (status
== -EAGAIN
)
4199 open
->op_why_no_deleg
= WND4_CONTENTION
;
4201 open
->op_why_no_deleg
= WND4_RESOURCE
;
4202 switch (open
->op_deleg_want
) {
4203 case NFS4_SHARE_WANT_READ_DELEG
:
4204 case NFS4_SHARE_WANT_WRITE_DELEG
:
4205 case NFS4_SHARE_WANT_ANY_DELEG
:
4207 case NFS4_SHARE_WANT_CANCEL
:
4208 open
->op_why_no_deleg
= WND4_CANCELLED
;
4210 case NFS4_SHARE_WANT_NO_DELEG
:
4217 * Attempt to hand out a delegation.
4219 * Note we don't support write delegations, and won't until the vfs has
4220 * proper support for them.
4223 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
,
4224 struct nfs4_ol_stateid
*stp
)
4226 struct nfs4_delegation
*dp
;
4227 struct nfs4_openowner
*oo
= openowner(stp
->st_stateowner
);
4228 struct nfs4_client
*clp
= stp
->st_stid
.sc_client
;
4232 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
4233 open
->op_recall
= 0;
4234 switch (open
->op_claim_type
) {
4235 case NFS4_OPEN_CLAIM_PREVIOUS
:
4237 open
->op_recall
= 1;
4238 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
4241 case NFS4_OPEN_CLAIM_NULL
:
4242 case NFS4_OPEN_CLAIM_FH
:
4244 * Let's not give out any delegations till everyone's
4245 * had the chance to reclaim theirs, *and* until
4246 * NLM locks have all been reclaimed:
4248 if (locks_in_grace(clp
->net
))
4250 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
4253 * Also, if the file was opened for write or
4254 * create, there's a good chance the client's
4255 * about to write to it, resulting in an
4256 * immediate recall (since we don't support
4257 * write delegations):
4259 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
4261 if (open
->op_create
== NFS4_OPEN_CREATE
)
4267 dp
= nfs4_set_delegation(clp
, fh
, stp
->st_stid
.sc_file
, stp
->st_clnt_odstate
);
4271 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
4273 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
4274 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
4275 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
4276 nfs4_put_stid(&dp
->dl_stid
);
4279 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
4280 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
4281 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
4282 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4283 open
->op_recall
= 1;
4286 /* 4.1 client asking for a delegation? */
4287 if (open
->op_deleg_want
)
4288 nfsd4_open_deleg_none_ext(open
, status
);
4292 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
4293 struct nfs4_delegation
*dp
)
4295 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
4296 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4297 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4298 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
4299 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
4300 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
4301 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4302 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
4304 /* Otherwise the client must be confused wanting a delegation
4305 * it already has, therefore we don't return
4306 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4311 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
4313 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
4314 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
4315 struct nfs4_file
*fp
= NULL
;
4316 struct nfs4_ol_stateid
*stp
= NULL
;
4317 struct nfs4_delegation
*dp
= NULL
;
4321 * Lookup file; if found, lookup stateid and check open request,
4322 * and check for delegations in the process of being recalled.
4323 * If not found, create the nfs4_file struct
4325 fp
= find_or_add_file(open
->op_file
, ¤t_fh
->fh_handle
);
4326 if (fp
!= open
->op_file
) {
4327 status
= nfs4_check_deleg(cl
, open
, &dp
);
4330 spin_lock(&fp
->fi_lock
);
4331 stp
= nfsd4_find_existing_open(fp
, open
);
4332 spin_unlock(&fp
->fi_lock
);
4334 open
->op_file
= NULL
;
4335 status
= nfserr_bad_stateid
;
4336 if (nfsd4_is_deleg_cur(open
))
4341 * OPEN the file, or upgrade an existing OPEN.
4342 * If truncate fails, the OPEN fails.
4345 /* Stateid was found, this is an OPEN upgrade */
4346 mutex_lock(&stp
->st_mutex
);
4347 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
4349 mutex_unlock(&stp
->st_mutex
);
4353 /* stp is returned locked. */
4354 stp
= init_open_stateid(fp
, open
);
4355 /* See if we lost the race to some other thread */
4356 if (stp
->st_access_bmap
!= 0) {
4357 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
,
4360 mutex_unlock(&stp
->st_mutex
);
4365 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, stp
, open
);
4367 mutex_unlock(&stp
->st_mutex
);
4368 release_open_stateid(stp
);
4372 stp
->st_clnt_odstate
= find_or_hash_clnt_odstate(fp
,
4374 if (stp
->st_clnt_odstate
== open
->op_odstate
)
4375 open
->op_odstate
= NULL
;
4378 nfs4_inc_and_copy_stateid(&open
->op_stateid
, &stp
->st_stid
);
4379 mutex_unlock(&stp
->st_mutex
);
4381 if (nfsd4_has_session(&resp
->cstate
)) {
4382 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
4383 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
4384 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
4390 * Attempt to hand out a delegation. No error return, because the
4391 * OPEN succeeds even if we fail.
4393 nfs4_open_delegation(current_fh
, open
, stp
);
4397 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
4398 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4400 /* 4.1 client trying to upgrade/downgrade delegation? */
4401 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
4402 open
->op_deleg_want
)
4403 nfsd4_deleg_xgrade_none_ext(open
, dp
);
4407 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
4408 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
4410 * To finish the open response, we just need to set the rflags.
4412 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
4413 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
4414 !nfsd4_has_session(&resp
->cstate
))
4415 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
4417 nfs4_put_stid(&dp
->dl_stid
);
4419 nfs4_put_stid(&stp
->st_stid
);
4424 void nfsd4_cleanup_open_state(struct nfsd4_compound_state
*cstate
,
4425 struct nfsd4_open
*open
)
4427 if (open
->op_openowner
) {
4428 struct nfs4_stateowner
*so
= &open
->op_openowner
->oo_owner
;
4430 nfsd4_cstate_assign_replay(cstate
, so
);
4431 nfs4_put_stateowner(so
);
4434 kmem_cache_free(file_slab
, open
->op_file
);
4436 nfs4_put_stid(&open
->op_stp
->st_stid
);
4437 if (open
->op_odstate
)
4438 kmem_cache_free(odstate_slab
, open
->op_odstate
);
4442 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4445 struct nfs4_client
*clp
;
4447 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4449 dprintk("process_renew(%08x/%08x): starting\n",
4450 clid
->cl_boot
, clid
->cl_id
);
4451 status
= lookup_clientid(clid
, cstate
, nn
);
4455 status
= nfserr_cb_path_down
;
4456 if (!list_empty(&clp
->cl_delegations
)
4457 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
4465 nfsd4_end_grace(struct nfsd_net
*nn
)
4467 /* do nothing if grace period already ended */
4468 if (nn
->grace_ended
)
4471 dprintk("NFSD: end of grace period\n");
4472 nn
->grace_ended
= true;
4474 * If the server goes down again right now, an NFSv4
4475 * client will still be allowed to reclaim after it comes back up,
4476 * even if it hasn't yet had a chance to reclaim state this time.
4479 nfsd4_record_grace_done(nn
);
4481 * At this point, NFSv4 clients can still reclaim. But if the
4482 * server crashes, any that have not yet reclaimed will be out
4483 * of luck on the next boot.
4485 * (NFSv4.1+ clients are considered to have reclaimed once they
4486 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4487 * have reclaimed after their first OPEN.)
4489 locks_end_grace(&nn
->nfsd4_manager
);
4491 * At this point, and once lockd and/or any other containers
4492 * exit their grace period, further reclaims will fail and
4493 * regular locking can resume.
4498 nfs4_laundromat(struct nfsd_net
*nn
)
4500 struct nfs4_client
*clp
;
4501 struct nfs4_openowner
*oo
;
4502 struct nfs4_delegation
*dp
;
4503 struct nfs4_ol_stateid
*stp
;
4504 struct list_head
*pos
, *next
, reaplist
;
4505 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
4506 time_t t
, new_timeo
= nn
->nfsd4_lease
;
4508 dprintk("NFSD: laundromat service - starting\n");
4509 nfsd4_end_grace(nn
);
4510 INIT_LIST_HEAD(&reaplist
);
4511 spin_lock(&nn
->client_lock
);
4512 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
4513 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4514 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
4515 t
= clp
->cl_time
- cutoff
;
4516 new_timeo
= min(new_timeo
, t
);
4519 if (mark_client_expired_locked(clp
)) {
4520 dprintk("NFSD: client in use (clientid %08x)\n",
4521 clp
->cl_clientid
.cl_id
);
4524 list_add(&clp
->cl_lru
, &reaplist
);
4526 spin_unlock(&nn
->client_lock
);
4527 list_for_each_safe(pos
, next
, &reaplist
) {
4528 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
4529 dprintk("NFSD: purging unused client (clientid %08x)\n",
4530 clp
->cl_clientid
.cl_id
);
4531 list_del_init(&clp
->cl_lru
);
4534 spin_lock(&state_lock
);
4535 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
4536 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4537 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
4538 t
= dp
->dl_time
- cutoff
;
4539 new_timeo
= min(new_timeo
, t
);
4542 WARN_ON(!unhash_delegation_locked(dp
));
4543 list_add(&dp
->dl_recall_lru
, &reaplist
);
4545 spin_unlock(&state_lock
);
4546 while (!list_empty(&reaplist
)) {
4547 dp
= list_first_entry(&reaplist
, struct nfs4_delegation
,
4549 list_del_init(&dp
->dl_recall_lru
);
4550 revoke_delegation(dp
);
4553 spin_lock(&nn
->client_lock
);
4554 while (!list_empty(&nn
->close_lru
)) {
4555 oo
= list_first_entry(&nn
->close_lru
, struct nfs4_openowner
,
4557 if (time_after((unsigned long)oo
->oo_time
,
4558 (unsigned long)cutoff
)) {
4559 t
= oo
->oo_time
- cutoff
;
4560 new_timeo
= min(new_timeo
, t
);
4563 list_del_init(&oo
->oo_close_lru
);
4564 stp
= oo
->oo_last_closed_stid
;
4565 oo
->oo_last_closed_stid
= NULL
;
4566 spin_unlock(&nn
->client_lock
);
4567 nfs4_put_stid(&stp
->st_stid
);
4568 spin_lock(&nn
->client_lock
);
4570 spin_unlock(&nn
->client_lock
);
4572 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
4576 static struct workqueue_struct
*laundry_wq
;
4577 static void laundromat_main(struct work_struct
*);
4580 laundromat_main(struct work_struct
*laundry
)
4583 struct delayed_work
*dwork
= to_delayed_work(laundry
);
4584 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
4587 t
= nfs4_laundromat(nn
);
4588 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
4589 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
4592 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stid
*stp
)
4594 if (!fh_match(&fhp
->fh_handle
, &stp
->sc_file
->fi_fhandle
))
4595 return nfserr_bad_stateid
;
4600 access_permit_read(struct nfs4_ol_stateid
*stp
)
4602 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
4603 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
4604 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
4608 access_permit_write(struct nfs4_ol_stateid
*stp
)
4610 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
4611 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
4615 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
4617 __be32 status
= nfserr_openmode
;
4619 /* For lock stateid's, we test the parent open, not the lock: */
4620 if (stp
->st_openstp
)
4621 stp
= stp
->st_openstp
;
4622 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
4624 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
4631 static inline __be32
4632 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
4634 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
4636 else if (opens_in_grace(net
)) {
4637 /* Answer in remaining cases depends on existence of
4638 * conflicting state; so we must wait out the grace period. */
4639 return nfserr_grace
;
4640 } else if (flags
& WR_STATE
)
4641 return nfs4_share_conflict(current_fh
,
4642 NFS4_SHARE_DENY_WRITE
);
4643 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4644 return nfs4_share_conflict(current_fh
,
4645 NFS4_SHARE_DENY_READ
);
4649 * Allow READ/WRITE during grace period on recovered state only for files
4650 * that are not able to provide mandatory locking.
4653 grace_disallows_io(struct net
*net
, struct inode
*inode
)
4655 return opens_in_grace(net
) && mandatory_lock(inode
);
4658 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
4661 * When sessions are used the stateid generation number is ignored
4664 if (has_session
&& in
->si_generation
== 0)
4667 if (in
->si_generation
== ref
->si_generation
)
4670 /* If the client sends us a stateid from the future, it's buggy: */
4671 if (nfsd4_stateid_generation_after(in
, ref
))
4672 return nfserr_bad_stateid
;
4674 * However, we could see a stateid from the past, even from a
4675 * non-buggy client. For example, if the client sends a lock
4676 * while some IO is outstanding, the lock may bump si_generation
4677 * while the IO is still in flight. The client could avoid that
4678 * situation by waiting for responses on all the IO requests,
4679 * but better performance may result in retrying IO that
4680 * receives an old_stateid error if requests are rarely
4681 * reordered in flight:
4683 return nfserr_old_stateid
;
4686 static __be32
nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid
*ols
)
4688 if (ols
->st_stateowner
->so_is_open_owner
&&
4689 !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
4690 return nfserr_bad_stateid
;
4694 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
4696 struct nfs4_stid
*s
;
4697 __be32 status
= nfserr_bad_stateid
;
4699 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4701 /* Client debugging aid. */
4702 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
4703 char addr_str
[INET6_ADDRSTRLEN
];
4704 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
4706 pr_warn_ratelimited("NFSD: client %s testing state ID "
4707 "with incorrect client ID\n", addr_str
);
4710 spin_lock(&cl
->cl_lock
);
4711 s
= find_stateid_locked(cl
, stateid
);
4714 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4717 switch (s
->sc_type
) {
4718 case NFS4_DELEG_STID
:
4721 case NFS4_REVOKED_DELEG_STID
:
4722 status
= nfserr_deleg_revoked
;
4724 case NFS4_OPEN_STID
:
4725 case NFS4_LOCK_STID
:
4726 status
= nfsd4_check_openowner_confirmed(openlockstateid(s
));
4729 printk("unknown stateid type %x\n", s
->sc_type
);
4731 case NFS4_CLOSED_STID
:
4732 case NFS4_CLOSED_DELEG_STID
:
4733 status
= nfserr_bad_stateid
;
4736 spin_unlock(&cl
->cl_lock
);
4741 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
4742 stateid_t
*stateid
, unsigned char typemask
,
4743 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
4747 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
4748 return nfserr_bad_stateid
;
4749 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
4750 if (status
== nfserr_stale_clientid
) {
4751 if (cstate
->session
)
4752 return nfserr_bad_stateid
;
4753 return nfserr_stale_stateid
;
4757 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
4759 return nfserr_bad_stateid
;
4763 static struct file
*
4764 nfs4_find_file(struct nfs4_stid
*s
, int flags
)
4769 switch (s
->sc_type
) {
4770 case NFS4_DELEG_STID
:
4771 if (WARN_ON_ONCE(!s
->sc_file
->fi_deleg_file
))
4773 return get_file(s
->sc_file
->fi_deleg_file
);
4774 case NFS4_OPEN_STID
:
4775 case NFS4_LOCK_STID
:
4776 if (flags
& RD_STATE
)
4777 return find_readable_file(s
->sc_file
);
4779 return find_writeable_file(s
->sc_file
);
4787 nfs4_check_olstateid(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*ols
, int flags
)
4791 status
= nfsd4_check_openowner_confirmed(ols
);
4794 return nfs4_check_openmode(ols
, flags
);
4798 nfs4_check_file(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct nfs4_stid
*s
,
4799 struct file
**filpp
, bool *tmp_file
, int flags
)
4801 int acc
= (flags
& RD_STATE
) ? NFSD_MAY_READ
: NFSD_MAY_WRITE
;
4805 file
= nfs4_find_file(s
, flags
);
4807 status
= nfsd_permission(rqstp
, fhp
->fh_export
, fhp
->fh_dentry
,
4808 acc
| NFSD_MAY_OWNER_OVERRIDE
);
4816 status
= nfsd_open(rqstp
, fhp
, S_IFREG
, acc
, filpp
);
4828 * Checks for stateid operations
4831 nfs4_preprocess_stateid_op(struct svc_rqst
*rqstp
,
4832 struct nfsd4_compound_state
*cstate
, struct svc_fh
*fhp
,
4833 stateid_t
*stateid
, int flags
, struct file
**filpp
, bool *tmp_file
)
4835 struct inode
*ino
= d_inode(fhp
->fh_dentry
);
4836 struct net
*net
= SVC_NET(rqstp
);
4837 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4838 struct nfs4_stid
*s
= NULL
;
4846 if (grace_disallows_io(net
, ino
))
4847 return nfserr_grace
;
4849 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
)) {
4850 status
= check_special_stateids(net
, fhp
, stateid
, flags
);
4854 status
= nfsd4_lookup_stateid(cstate
, stateid
,
4855 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
4859 status
= check_stateid_generation(stateid
, &s
->sc_stateid
,
4860 nfsd4_has_session(cstate
));
4864 switch (s
->sc_type
) {
4865 case NFS4_DELEG_STID
:
4866 status
= nfs4_check_delegmode(delegstateid(s
), flags
);
4868 case NFS4_OPEN_STID
:
4869 case NFS4_LOCK_STID
:
4870 status
= nfs4_check_olstateid(fhp
, openlockstateid(s
), flags
);
4873 status
= nfserr_bad_stateid
;
4878 status
= nfs4_check_fh(fhp
, s
);
4881 if (!status
&& filpp
)
4882 status
= nfs4_check_file(rqstp
, fhp
, s
, filpp
, tmp_file
, flags
);
4890 * Test if the stateid is valid
4893 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4894 struct nfsd4_test_stateid
*test_stateid
)
4896 struct nfsd4_test_stateid_id
*stateid
;
4897 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4899 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
4900 stateid
->ts_id_status
=
4901 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
4907 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4908 struct nfsd4_free_stateid
*free_stateid
)
4910 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
4911 struct nfs4_stid
*s
;
4912 struct nfs4_delegation
*dp
;
4913 struct nfs4_ol_stateid
*stp
;
4914 struct nfs4_client
*cl
= cstate
->session
->se_client
;
4915 __be32 ret
= nfserr_bad_stateid
;
4917 spin_lock(&cl
->cl_lock
);
4918 s
= find_stateid_locked(cl
, stateid
);
4921 switch (s
->sc_type
) {
4922 case NFS4_DELEG_STID
:
4923 ret
= nfserr_locks_held
;
4925 case NFS4_OPEN_STID
:
4926 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4929 ret
= nfserr_locks_held
;
4931 case NFS4_LOCK_STID
:
4932 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
4935 stp
= openlockstateid(s
);
4936 ret
= nfserr_locks_held
;
4937 if (check_for_locks(stp
->st_stid
.sc_file
,
4938 lockowner(stp
->st_stateowner
)))
4940 WARN_ON(!unhash_lock_stateid(stp
));
4941 spin_unlock(&cl
->cl_lock
);
4945 case NFS4_REVOKED_DELEG_STID
:
4946 dp
= delegstateid(s
);
4947 list_del_init(&dp
->dl_recall_lru
);
4948 spin_unlock(&cl
->cl_lock
);
4952 /* Default falls through and returns nfserr_bad_stateid */
4955 spin_unlock(&cl
->cl_lock
);
4963 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
4964 RD_STATE
: WR_STATE
;
4967 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
4969 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4970 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
4973 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
4976 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
4977 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
4979 * "Closed" stateid's exist *only* to return
4980 * nfserr_replay_me from the previous step, and
4981 * revoked delegations are kept only for free_stateid.
4983 return nfserr_bad_stateid
;
4984 mutex_lock(&stp
->st_mutex
);
4985 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4986 if (status
== nfs_ok
)
4987 status
= nfs4_check_fh(current_fh
, &stp
->st_stid
);
4988 if (status
!= nfs_ok
)
4989 mutex_unlock(&stp
->st_mutex
);
4994 * Checks for sequence id mutating operations.
4997 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4998 stateid_t
*stateid
, char typemask
,
4999 struct nfs4_ol_stateid
**stpp
,
5000 struct nfsd_net
*nn
)
5003 struct nfs4_stid
*s
;
5004 struct nfs4_ol_stateid
*stp
= NULL
;
5006 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
5007 seqid
, STATEID_VAL(stateid
));
5010 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
5013 stp
= openlockstateid(s
);
5014 nfsd4_cstate_assign_replay(cstate
, stp
->st_stateowner
);
5016 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
5020 nfs4_put_stid(&stp
->st_stid
);
5024 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
5025 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
5028 struct nfs4_openowner
*oo
;
5029 struct nfs4_ol_stateid
*stp
;
5031 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
5032 NFS4_OPEN_STID
, &stp
, nn
);
5035 oo
= openowner(stp
->st_stateowner
);
5036 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
5037 mutex_unlock(&stp
->st_mutex
);
5038 nfs4_put_stid(&stp
->st_stid
);
5039 return nfserr_bad_stateid
;
5046 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5047 struct nfsd4_open_confirm
*oc
)
5050 struct nfs4_openowner
*oo
;
5051 struct nfs4_ol_stateid
*stp
;
5052 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5054 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5055 cstate
->current_fh
.fh_dentry
);
5057 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
5061 status
= nfs4_preprocess_seqid_op(cstate
,
5062 oc
->oc_seqid
, &oc
->oc_req_stateid
,
5063 NFS4_OPEN_STID
, &stp
, nn
);
5066 oo
= openowner(stp
->st_stateowner
);
5067 status
= nfserr_bad_stateid
;
5068 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
) {
5069 mutex_unlock(&stp
->st_mutex
);
5072 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
5073 nfs4_inc_and_copy_stateid(&oc
->oc_resp_stateid
, &stp
->st_stid
);
5074 mutex_unlock(&stp
->st_mutex
);
5075 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
5076 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
5078 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
5081 nfs4_put_stid(&stp
->st_stid
);
5083 nfsd4_bump_seqid(cstate
, status
);
5087 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
5089 if (!test_access(access
, stp
))
5091 nfs4_file_put_access(stp
->st_stid
.sc_file
, access
);
5092 clear_access(access
, stp
);
5095 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
5097 switch (to_access
) {
5098 case NFS4_SHARE_ACCESS_READ
:
5099 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
5100 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5102 case NFS4_SHARE_ACCESS_WRITE
:
5103 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
5104 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
5106 case NFS4_SHARE_ACCESS_BOTH
:
5114 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
5115 struct nfsd4_compound_state
*cstate
,
5116 struct nfsd4_open_downgrade
*od
)
5119 struct nfs4_ol_stateid
*stp
;
5120 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5122 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5123 cstate
->current_fh
.fh_dentry
);
5125 /* We don't yet support WANT bits: */
5126 if (od
->od_deleg_want
)
5127 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
5130 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
5131 &od
->od_stateid
, &stp
, nn
);
5134 status
= nfserr_inval
;
5135 if (!test_access(od
->od_share_access
, stp
)) {
5136 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5137 stp
->st_access_bmap
, od
->od_share_access
);
5140 if (!test_deny(od
->od_share_deny
, stp
)) {
5141 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5142 stp
->st_deny_bmap
, od
->od_share_deny
);
5145 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
5146 reset_union_bmap_deny(od
->od_share_deny
, stp
);
5147 nfs4_inc_and_copy_stateid(&od
->od_stateid
, &stp
->st_stid
);
5150 mutex_unlock(&stp
->st_mutex
);
5151 nfs4_put_stid(&stp
->st_stid
);
5153 nfsd4_bump_seqid(cstate
, status
);
5157 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
5159 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
5161 LIST_HEAD(reaplist
);
5163 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
5164 spin_lock(&clp
->cl_lock
);
5165 unhashed
= unhash_open_stateid(s
, &reaplist
);
5167 if (clp
->cl_minorversion
) {
5169 put_ol_stateid_locked(s
, &reaplist
);
5170 spin_unlock(&clp
->cl_lock
);
5171 free_ol_stateid_reaplist(&reaplist
);
5173 spin_unlock(&clp
->cl_lock
);
5174 free_ol_stateid_reaplist(&reaplist
);
5176 move_to_close_lru(s
, clp
->net
);
5181 * nfs4_unlock_state() called after encode
5184 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5185 struct nfsd4_close
*close
)
5188 struct nfs4_ol_stateid
*stp
;
5189 struct net
*net
= SVC_NET(rqstp
);
5190 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5192 dprintk("NFSD: nfsd4_close on file %pd\n",
5193 cstate
->current_fh
.fh_dentry
);
5195 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
5197 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
5199 nfsd4_bump_seqid(cstate
, status
);
5202 nfs4_inc_and_copy_stateid(&close
->cl_stateid
, &stp
->st_stid
);
5203 mutex_unlock(&stp
->st_mutex
);
5205 nfsd4_close_open_stateid(stp
);
5207 /* put reference from nfs4_preprocess_seqid_op */
5208 nfs4_put_stid(&stp
->st_stid
);
5214 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5215 struct nfsd4_delegreturn
*dr
)
5217 struct nfs4_delegation
*dp
;
5218 stateid_t
*stateid
= &dr
->dr_stateid
;
5219 struct nfs4_stid
*s
;
5221 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5223 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5226 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
5229 dp
= delegstateid(s
);
5230 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
5234 destroy_delegation(dp
);
5236 nfs4_put_stid(&dp
->dl_stid
);
5242 end_offset(u64 start
, u64 len
)
5247 return end
>= start
? end
: NFS4_MAX_UINT64
;
5250 /* last octet in a range */
5252 last_byte_offset(u64 start
, u64 len
)
5258 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
5262 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5263 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5264 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5265 * locking, this prevents us from being completely protocol-compliant. The
5266 * real solution to this problem is to start using unsigned file offsets in
5267 * the VFS, but this is a very deep change!
5270 nfs4_transform_lock_offset(struct file_lock
*lock
)
5272 if (lock
->fl_start
< 0)
5273 lock
->fl_start
= OFFSET_MAX
;
5274 if (lock
->fl_end
< 0)
5275 lock
->fl_end
= OFFSET_MAX
;
5279 nfsd4_fl_get_owner(fl_owner_t owner
)
5281 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5283 nfs4_get_stateowner(&lo
->lo_owner
);
5288 nfsd4_fl_put_owner(fl_owner_t owner
)
5290 struct nfs4_lockowner
*lo
= (struct nfs4_lockowner
*)owner
;
5293 nfs4_put_stateowner(&lo
->lo_owner
);
5296 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
5297 .lm_get_owner
= nfsd4_fl_get_owner
,
5298 .lm_put_owner
= nfsd4_fl_put_owner
,
5302 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
5304 struct nfs4_lockowner
*lo
;
5306 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
5307 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
5308 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
5309 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
5310 if (!deny
->ld_owner
.data
)
5311 /* We just don't care that much */
5313 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
5314 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
5317 deny
->ld_owner
.len
= 0;
5318 deny
->ld_owner
.data
= NULL
;
5319 deny
->ld_clientid
.cl_boot
= 0;
5320 deny
->ld_clientid
.cl_id
= 0;
5322 deny
->ld_start
= fl
->fl_start
;
5323 deny
->ld_length
= NFS4_MAX_UINT64
;
5324 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
5325 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
5326 deny
->ld_type
= NFS4_READ_LT
;
5327 if (fl
->fl_type
!= F_RDLCK
)
5328 deny
->ld_type
= NFS4_WRITE_LT
;
5331 static struct nfs4_lockowner
*
5332 find_lockowner_str_locked(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5334 unsigned int strhashval
= ownerstr_hashval(owner
);
5335 struct nfs4_stateowner
*so
;
5337 lockdep_assert_held(&clp
->cl_lock
);
5339 list_for_each_entry(so
, &clp
->cl_ownerstr_hashtbl
[strhashval
],
5341 if (so
->so_is_open_owner
)
5343 if (same_owner_str(so
, owner
))
5344 return lockowner(nfs4_get_stateowner(so
));
5349 static struct nfs4_lockowner
*
5350 find_lockowner_str(struct nfs4_client
*clp
, struct xdr_netobj
*owner
)
5352 struct nfs4_lockowner
*lo
;
5354 spin_lock(&clp
->cl_lock
);
5355 lo
= find_lockowner_str_locked(clp
, owner
);
5356 spin_unlock(&clp
->cl_lock
);
5360 static void nfs4_unhash_lockowner(struct nfs4_stateowner
*sop
)
5362 unhash_lockowner_locked(lockowner(sop
));
5365 static void nfs4_free_lockowner(struct nfs4_stateowner
*sop
)
5367 struct nfs4_lockowner
*lo
= lockowner(sop
);
5369 kmem_cache_free(lockowner_slab
, lo
);
5372 static const struct nfs4_stateowner_operations lockowner_ops
= {
5373 .so_unhash
= nfs4_unhash_lockowner
,
5374 .so_free
= nfs4_free_lockowner
,
5378 * Alloc a lock owner structure.
5379 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5382 * strhashval = ownerstr_hashval
5384 static struct nfs4_lockowner
*
5385 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
,
5386 struct nfs4_ol_stateid
*open_stp
,
5387 struct nfsd4_lock
*lock
)
5389 struct nfs4_lockowner
*lo
, *ret
;
5391 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
5394 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
5395 lo
->lo_owner
.so_is_open_owner
= 0;
5396 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
;
5397 lo
->lo_owner
.so_ops
= &lockowner_ops
;
5398 spin_lock(&clp
->cl_lock
);
5399 ret
= find_lockowner_str_locked(clp
, &lock
->lk_new_owner
);
5401 list_add(&lo
->lo_owner
.so_strhash
,
5402 &clp
->cl_ownerstr_hashtbl
[strhashval
]);
5405 nfs4_free_stateowner(&lo
->lo_owner
);
5407 spin_unlock(&clp
->cl_lock
);
5412 init_lock_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_lockowner
*lo
,
5413 struct nfs4_file
*fp
, struct inode
*inode
,
5414 struct nfs4_ol_stateid
*open_stp
)
5416 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5418 lockdep_assert_held(&clp
->cl_lock
);
5420 atomic_inc(&stp
->st_stid
.sc_count
);
5421 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
5422 stp
->st_stateowner
= nfs4_get_stateowner(&lo
->lo_owner
);
5424 stp
->st_stid
.sc_file
= fp
;
5425 stp
->st_stid
.sc_free
= nfs4_free_lock_stateid
;
5426 stp
->st_access_bmap
= 0;
5427 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
5428 stp
->st_openstp
= open_stp
;
5429 mutex_init(&stp
->st_mutex
);
5430 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
5431 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
5432 spin_lock(&fp
->fi_lock
);
5433 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
5434 spin_unlock(&fp
->fi_lock
);
5437 static struct nfs4_ol_stateid
*
5438 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
5440 struct nfs4_ol_stateid
*lst
;
5441 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
5443 lockdep_assert_held(&clp
->cl_lock
);
5445 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
5446 if (lst
->st_stid
.sc_file
== fp
) {
5447 atomic_inc(&lst
->st_stid
.sc_count
);
5454 static struct nfs4_ol_stateid
*
5455 find_or_create_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fi
,
5456 struct inode
*inode
, struct nfs4_ol_stateid
*ost
,
5459 struct nfs4_stid
*ns
= NULL
;
5460 struct nfs4_ol_stateid
*lst
;
5461 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5462 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
5464 spin_lock(&clp
->cl_lock
);
5465 lst
= find_lock_stateid(lo
, fi
);
5467 spin_unlock(&clp
->cl_lock
);
5468 ns
= nfs4_alloc_stid(clp
, stateid_slab
);
5472 spin_lock(&clp
->cl_lock
);
5473 lst
= find_lock_stateid(lo
, fi
);
5475 lst
= openlockstateid(ns
);
5476 init_lock_stateid(lst
, lo
, fi
, inode
, ost
);
5481 spin_unlock(&clp
->cl_lock
);
5488 check_lock_length(u64 offset
, u64 length
)
5490 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
5491 (length
> ~offset
)));
5494 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
5496 struct nfs4_file
*fp
= lock_stp
->st_stid
.sc_file
;
5498 lockdep_assert_held(&fp
->fi_lock
);
5500 if (test_access(access
, lock_stp
))
5502 __nfs4_file_get_access(fp
, access
);
5503 set_access(access
, lock_stp
);
5507 lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
,
5508 struct nfs4_ol_stateid
*ost
,
5509 struct nfsd4_lock
*lock
,
5510 struct nfs4_ol_stateid
**lst
, bool *new)
5513 struct nfs4_file
*fi
= ost
->st_stid
.sc_file
;
5514 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
5515 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
5516 struct inode
*inode
= d_inode(cstate
->current_fh
.fh_dentry
);
5517 struct nfs4_lockowner
*lo
;
5518 unsigned int strhashval
;
5520 lo
= find_lockowner_str(cl
, &lock
->lk_new_owner
);
5522 strhashval
= ownerstr_hashval(&lock
->lk_new_owner
);
5523 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
5525 return nfserr_jukebox
;
5527 /* with an existing lockowner, seqids must be the same */
5528 status
= nfserr_bad_seqid
;
5529 if (!cstate
->minorversion
&&
5530 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
5534 *lst
= find_or_create_lock_stateid(lo
, fi
, inode
, ost
, new);
5536 status
= nfserr_jukebox
;
5541 nfs4_put_stateowner(&lo
->lo_owner
);
5549 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5550 struct nfsd4_lock
*lock
)
5552 struct nfs4_openowner
*open_sop
= NULL
;
5553 struct nfs4_lockowner
*lock_sop
= NULL
;
5554 struct nfs4_ol_stateid
*lock_stp
= NULL
;
5555 struct nfs4_ol_stateid
*open_stp
= NULL
;
5556 struct nfs4_file
*fp
;
5557 struct file
*filp
= NULL
;
5558 struct file_lock
*file_lock
= NULL
;
5559 struct file_lock
*conflock
= NULL
;
5564 struct net
*net
= SVC_NET(rqstp
);
5565 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5567 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5568 (long long) lock
->lk_offset
,
5569 (long long) lock
->lk_length
);
5571 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
5572 return nfserr_inval
;
5574 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
5575 S_IFREG
, NFSD_MAY_LOCK
))) {
5576 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5580 if (lock
->lk_is_new
) {
5581 if (nfsd4_has_session(cstate
))
5582 /* See rfc 5661 18.10.3: given clientid is ignored: */
5583 memcpy(&lock
->lk_new_clientid
,
5584 &cstate
->session
->se_client
->cl_clientid
,
5585 sizeof(clientid_t
));
5587 status
= nfserr_stale_clientid
;
5588 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
5591 /* validate and update open stateid and open seqid */
5592 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
5593 lock
->lk_new_open_seqid
,
5594 &lock
->lk_new_open_stateid
,
5598 mutex_unlock(&open_stp
->st_mutex
);
5599 open_sop
= openowner(open_stp
->st_stateowner
);
5600 status
= nfserr_bad_stateid
;
5601 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
5602 &lock
->lk_new_clientid
))
5604 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
5606 if (status
== nfs_ok
)
5607 mutex_lock(&lock_stp
->st_mutex
);
5609 status
= nfs4_preprocess_seqid_op(cstate
,
5610 lock
->lk_old_lock_seqid
,
5611 &lock
->lk_old_lock_stateid
,
5612 NFS4_LOCK_STID
, &lock_stp
, nn
);
5616 lock_sop
= lockowner(lock_stp
->st_stateowner
);
5618 lkflg
= setlkflg(lock
->lk_type
);
5619 status
= nfs4_check_openmode(lock_stp
, lkflg
);
5623 status
= nfserr_grace
;
5624 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
5626 status
= nfserr_no_grace
;
5627 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
5630 file_lock
= locks_alloc_lock();
5632 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5633 status
= nfserr_jukebox
;
5637 fp
= lock_stp
->st_stid
.sc_file
;
5638 switch (lock
->lk_type
) {
5641 spin_lock(&fp
->fi_lock
);
5642 filp
= find_readable_file_locked(fp
);
5644 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
5645 spin_unlock(&fp
->fi_lock
);
5646 file_lock
->fl_type
= F_RDLCK
;
5649 case NFS4_WRITEW_LT
:
5650 spin_lock(&fp
->fi_lock
);
5651 filp
= find_writeable_file_locked(fp
);
5653 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
5654 spin_unlock(&fp
->fi_lock
);
5655 file_lock
->fl_type
= F_WRLCK
;
5658 status
= nfserr_inval
;
5662 status
= nfserr_openmode
;
5666 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(&lock_sop
->lo_owner
));
5667 file_lock
->fl_pid
= current
->tgid
;
5668 file_lock
->fl_file
= filp
;
5669 file_lock
->fl_flags
= FL_POSIX
;
5670 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5671 file_lock
->fl_start
= lock
->lk_offset
;
5672 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
5673 nfs4_transform_lock_offset(file_lock
);
5675 conflock
= locks_alloc_lock();
5677 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5678 status
= nfserr_jukebox
;
5682 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
5684 case 0: /* success! */
5685 nfs4_inc_and_copy_stateid(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
);
5688 case (EAGAIN
): /* conflock holds conflicting lock */
5689 status
= nfserr_denied
;
5690 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5691 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
5694 status
= nfserr_deadlock
;
5697 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
5698 status
= nfserrno(err
);
5705 /* Bump seqid manually if the 4.0 replay owner is openowner */
5706 if (cstate
->replay_owner
&&
5707 cstate
->replay_owner
!= &lock_sop
->lo_owner
&&
5708 seqid_mutating_err(ntohl(status
)))
5709 lock_sop
->lo_owner
.so_seqid
++;
5711 mutex_unlock(&lock_stp
->st_mutex
);
5714 * If this is a new, never-before-used stateid, and we are
5715 * returning an error, then just go ahead and release it.
5718 release_lock_stateid(lock_stp
);
5720 nfs4_put_stid(&lock_stp
->st_stid
);
5723 nfs4_put_stid(&open_stp
->st_stid
);
5724 nfsd4_bump_seqid(cstate
, status
);
5726 locks_free_lock(file_lock
);
5728 locks_free_lock(conflock
);
5733 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5734 * so we do a temporary open here just to get an open file to pass to
5735 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5738 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
5741 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
5743 err
= nfserrno(vfs_test_lock(file
, lock
));
5753 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5754 struct nfsd4_lockt
*lockt
)
5756 struct file_lock
*file_lock
= NULL
;
5757 struct nfs4_lockowner
*lo
= NULL
;
5759 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5761 if (locks_in_grace(SVC_NET(rqstp
)))
5762 return nfserr_grace
;
5764 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
5765 return nfserr_inval
;
5767 if (!nfsd4_has_session(cstate
)) {
5768 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
5773 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
5776 file_lock
= locks_alloc_lock();
5778 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5779 status
= nfserr_jukebox
;
5783 switch (lockt
->lt_type
) {
5786 file_lock
->fl_type
= F_RDLCK
;
5789 case NFS4_WRITEW_LT
:
5790 file_lock
->fl_type
= F_WRLCK
;
5793 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
5794 status
= nfserr_inval
;
5798 lo
= find_lockowner_str(cstate
->clp
, &lockt
->lt_owner
);
5800 file_lock
->fl_owner
= (fl_owner_t
)lo
;
5801 file_lock
->fl_pid
= current
->tgid
;
5802 file_lock
->fl_flags
= FL_POSIX
;
5804 file_lock
->fl_start
= lockt
->lt_offset
;
5805 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
5807 nfs4_transform_lock_offset(file_lock
);
5809 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
5813 if (file_lock
->fl_type
!= F_UNLCK
) {
5814 status
= nfserr_denied
;
5815 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
5819 nfs4_put_stateowner(&lo
->lo_owner
);
5821 locks_free_lock(file_lock
);
5826 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
5827 struct nfsd4_locku
*locku
)
5829 struct nfs4_ol_stateid
*stp
;
5830 struct file
*filp
= NULL
;
5831 struct file_lock
*file_lock
= NULL
;
5834 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5836 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
5837 (long long) locku
->lu_offset
,
5838 (long long) locku
->lu_length
);
5840 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
5841 return nfserr_inval
;
5843 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
5844 &locku
->lu_stateid
, NFS4_LOCK_STID
,
5848 filp
= find_any_file(stp
->st_stid
.sc_file
);
5850 status
= nfserr_lock_range
;
5853 file_lock
= locks_alloc_lock();
5855 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
5856 status
= nfserr_jukebox
;
5860 file_lock
->fl_type
= F_UNLCK
;
5861 file_lock
->fl_owner
= (fl_owner_t
)lockowner(nfs4_get_stateowner(stp
->st_stateowner
));
5862 file_lock
->fl_pid
= current
->tgid
;
5863 file_lock
->fl_file
= filp
;
5864 file_lock
->fl_flags
= FL_POSIX
;
5865 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
5866 file_lock
->fl_start
= locku
->lu_offset
;
5868 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
5870 nfs4_transform_lock_offset(file_lock
);
5872 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
5874 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
5877 nfs4_inc_and_copy_stateid(&locku
->lu_stateid
, &stp
->st_stid
);
5881 mutex_unlock(&stp
->st_mutex
);
5882 nfs4_put_stid(&stp
->st_stid
);
5884 nfsd4_bump_seqid(cstate
, status
);
5886 locks_free_lock(file_lock
);
5890 status
= nfserrno(err
);
5896 * true: locks held by lockowner
5897 * false: no locks held by lockowner
5900 check_for_locks(struct nfs4_file
*fp
, struct nfs4_lockowner
*lowner
)
5902 struct file_lock
*fl
;
5904 struct file
*filp
= find_any_file(fp
);
5905 struct inode
*inode
;
5906 struct file_lock_context
*flctx
;
5909 /* Any valid lock stateid should have some sort of access */
5914 inode
= file_inode(filp
);
5915 flctx
= inode
->i_flctx
;
5917 if (flctx
&& !list_empty_careful(&flctx
->flc_posix
)) {
5918 spin_lock(&flctx
->flc_lock
);
5919 list_for_each_entry(fl
, &flctx
->flc_posix
, fl_list
) {
5920 if (fl
->fl_owner
== (fl_owner_t
)lowner
) {
5925 spin_unlock(&flctx
->flc_lock
);
5932 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
5933 struct nfsd4_compound_state
*cstate
,
5934 struct nfsd4_release_lockowner
*rlockowner
)
5936 clientid_t
*clid
= &rlockowner
->rl_clientid
;
5937 struct nfs4_stateowner
*sop
;
5938 struct nfs4_lockowner
*lo
= NULL
;
5939 struct nfs4_ol_stateid
*stp
;
5940 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
5941 unsigned int hashval
= ownerstr_hashval(owner
);
5943 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
5944 struct nfs4_client
*clp
;
5945 LIST_HEAD (reaplist
);
5947 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
5948 clid
->cl_boot
, clid
->cl_id
);
5950 status
= lookup_clientid(clid
, cstate
, nn
);
5955 /* Find the matching lock stateowner */
5956 spin_lock(&clp
->cl_lock
);
5957 list_for_each_entry(sop
, &clp
->cl_ownerstr_hashtbl
[hashval
],
5960 if (sop
->so_is_open_owner
|| !same_owner_str(sop
, owner
))
5963 /* see if there are still any locks associated with it */
5964 lo
= lockowner(sop
);
5965 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
5966 if (check_for_locks(stp
->st_stid
.sc_file
, lo
)) {
5967 status
= nfserr_locks_held
;
5968 spin_unlock(&clp
->cl_lock
);
5973 nfs4_get_stateowner(sop
);
5977 spin_unlock(&clp
->cl_lock
);
5981 unhash_lockowner_locked(lo
);
5982 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
5983 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
5984 struct nfs4_ol_stateid
,
5986 WARN_ON(!unhash_lock_stateid(stp
));
5987 put_ol_stateid_locked(stp
, &reaplist
);
5989 spin_unlock(&clp
->cl_lock
);
5990 free_ol_stateid_reaplist(&reaplist
);
5991 nfs4_put_stateowner(&lo
->lo_owner
);
5996 static inline struct nfs4_client_reclaim
*
5999 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
6003 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
6005 struct nfs4_client_reclaim
*crp
;
6007 crp
= nfsd4_find_reclaim_client(name
, nn
);
6008 return (crp
&& crp
->cr_clp
);
6012 * failure => all reset bets are off, nfserr_no_grace...
6014 struct nfs4_client_reclaim
*
6015 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
6017 unsigned int strhashval
;
6018 struct nfs4_client_reclaim
*crp
;
6020 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
6021 crp
= alloc_reclaim();
6023 strhashval
= clientstr_hashval(name
);
6024 INIT_LIST_HEAD(&crp
->cr_strhash
);
6025 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
6026 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
6028 nn
->reclaim_str_hashtbl_size
++;
6034 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
6036 list_del(&crp
->cr_strhash
);
6038 nn
->reclaim_str_hashtbl_size
--;
6042 nfs4_release_reclaim(struct nfsd_net
*nn
)
6044 struct nfs4_client_reclaim
*crp
= NULL
;
6047 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6048 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
6049 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
6050 struct nfs4_client_reclaim
, cr_strhash
);
6051 nfs4_remove_reclaim_record(crp
, nn
);
6054 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
6058 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
6059 struct nfs4_client_reclaim
*
6060 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
6062 unsigned int strhashval
;
6063 struct nfs4_client_reclaim
*crp
= NULL
;
6065 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
6067 strhashval
= clientstr_hashval(recdir
);
6068 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
6069 if (same_name(crp
->cr_recdir
, recdir
)) {
6077 * Called from OPEN. Look for clientid in reclaim list.
6080 nfs4_check_open_reclaim(clientid_t
*clid
,
6081 struct nfsd4_compound_state
*cstate
,
6082 struct nfsd_net
*nn
)
6086 /* find clientid in conf_id_hashtbl */
6087 status
= lookup_clientid(clid
, cstate
, nn
);
6089 return nfserr_reclaim_bad
;
6091 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
, &cstate
->clp
->cl_flags
))
6092 return nfserr_no_grace
;
6094 if (nfsd4_client_record_check(cstate
->clp
))
6095 return nfserr_reclaim_bad
;
6100 #ifdef CONFIG_NFSD_FAULT_INJECTION
6102 put_client(struct nfs4_client
*clp
)
6104 atomic_dec(&clp
->cl_refcount
);
6107 static struct nfs4_client
*
6108 nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6110 struct nfs4_client
*clp
;
6111 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6114 if (!nfsd_netns_ready(nn
))
6117 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6118 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
6125 nfsd_inject_print_clients(void)
6127 struct nfs4_client
*clp
;
6129 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6131 char buf
[INET6_ADDRSTRLEN
];
6133 if (!nfsd_netns_ready(nn
))
6136 spin_lock(&nn
->client_lock
);
6137 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6138 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6139 pr_info("NFS Client: %s\n", buf
);
6142 spin_unlock(&nn
->client_lock
);
6148 nfsd_inject_forget_client(struct sockaddr_storage
*addr
, size_t addr_size
)
6151 struct nfs4_client
*clp
;
6152 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6155 if (!nfsd_netns_ready(nn
))
6158 spin_lock(&nn
->client_lock
);
6159 clp
= nfsd_find_client(addr
, addr_size
);
6161 if (mark_client_expired_locked(clp
) == nfs_ok
)
6166 spin_unlock(&nn
->client_lock
);
6175 nfsd_inject_forget_clients(u64 max
)
6178 struct nfs4_client
*clp
, *next
;
6179 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6181 LIST_HEAD(reaplist
);
6183 if (!nfsd_netns_ready(nn
))
6186 spin_lock(&nn
->client_lock
);
6187 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6188 if (mark_client_expired_locked(clp
) == nfs_ok
) {
6189 list_add(&clp
->cl_lru
, &reaplist
);
6190 if (max
!= 0 && ++count
>= max
)
6194 spin_unlock(&nn
->client_lock
);
6196 list_for_each_entry_safe(clp
, next
, &reaplist
, cl_lru
)
6202 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
6205 char buf
[INET6_ADDRSTRLEN
];
6206 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
6207 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
6211 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid
*lst
,
6212 struct list_head
*collect
)
6214 struct nfs4_client
*clp
= lst
->st_stid
.sc_client
;
6215 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6221 lockdep_assert_held(&nn
->client_lock
);
6222 atomic_inc(&clp
->cl_refcount
);
6223 list_add(&lst
->st_locks
, collect
);
6226 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
6227 struct list_head
*collect
,
6228 bool (*func
)(struct nfs4_ol_stateid
*))
6230 struct nfs4_openowner
*oop
;
6231 struct nfs4_ol_stateid
*stp
, *st_next
;
6232 struct nfs4_ol_stateid
*lst
, *lst_next
;
6235 spin_lock(&clp
->cl_lock
);
6236 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
6237 list_for_each_entry_safe(stp
, st_next
,
6238 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
6239 list_for_each_entry_safe(lst
, lst_next
,
6240 &stp
->st_locks
, st_locks
) {
6243 nfsd_inject_add_lock_to_list(lst
,
6248 * Despite the fact that these functions deal
6249 * with 64-bit integers for "count", we must
6250 * ensure that it doesn't blow up the
6251 * clp->cl_refcount. Throw a warning if we
6252 * start to approach INT_MAX here.
6254 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6261 spin_unlock(&clp
->cl_lock
);
6267 nfsd_collect_client_locks(struct nfs4_client
*clp
, struct list_head
*collect
,
6270 return nfsd_foreach_client_lock(clp
, max
, collect
, unhash_lock_stateid
);
6274 nfsd_print_client_locks(struct nfs4_client
*clp
)
6276 u64 count
= nfsd_foreach_client_lock(clp
, 0, NULL
, NULL
);
6277 nfsd_print_count(clp
, count
, "locked files");
6282 nfsd_inject_print_locks(void)
6284 struct nfs4_client
*clp
;
6286 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6289 if (!nfsd_netns_ready(nn
))
6292 spin_lock(&nn
->client_lock
);
6293 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6294 count
+= nfsd_print_client_locks(clp
);
6295 spin_unlock(&nn
->client_lock
);
6301 nfsd_reap_locks(struct list_head
*reaplist
)
6303 struct nfs4_client
*clp
;
6304 struct nfs4_ol_stateid
*stp
, *next
;
6306 list_for_each_entry_safe(stp
, next
, reaplist
, st_locks
) {
6307 list_del_init(&stp
->st_locks
);
6308 clp
= stp
->st_stid
.sc_client
;
6309 nfs4_put_stid(&stp
->st_stid
);
6315 nfsd_inject_forget_client_locks(struct sockaddr_storage
*addr
, size_t addr_size
)
6317 unsigned int count
= 0;
6318 struct nfs4_client
*clp
;
6319 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6321 LIST_HEAD(reaplist
);
6323 if (!nfsd_netns_ready(nn
))
6326 spin_lock(&nn
->client_lock
);
6327 clp
= nfsd_find_client(addr
, addr_size
);
6329 count
= nfsd_collect_client_locks(clp
, &reaplist
, 0);
6330 spin_unlock(&nn
->client_lock
);
6331 nfsd_reap_locks(&reaplist
);
6336 nfsd_inject_forget_locks(u64 max
)
6339 struct nfs4_client
*clp
;
6340 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6342 LIST_HEAD(reaplist
);
6344 if (!nfsd_netns_ready(nn
))
6347 spin_lock(&nn
->client_lock
);
6348 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6349 count
+= nfsd_collect_client_locks(clp
, &reaplist
, max
- count
);
6350 if (max
!= 0 && count
>= max
)
6353 spin_unlock(&nn
->client_lock
);
6354 nfsd_reap_locks(&reaplist
);
6359 nfsd_foreach_client_openowner(struct nfs4_client
*clp
, u64 max
,
6360 struct list_head
*collect
,
6361 void (*func
)(struct nfs4_openowner
*))
6363 struct nfs4_openowner
*oop
, *next
;
6364 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6368 lockdep_assert_held(&nn
->client_lock
);
6370 spin_lock(&clp
->cl_lock
);
6371 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
6375 atomic_inc(&clp
->cl_refcount
);
6376 list_add(&oop
->oo_perclient
, collect
);
6381 * Despite the fact that these functions deal with
6382 * 64-bit integers for "count", we must ensure that
6383 * it doesn't blow up the clp->cl_refcount. Throw a
6384 * warning if we start to approach INT_MAX here.
6386 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6390 spin_unlock(&clp
->cl_lock
);
6396 nfsd_print_client_openowners(struct nfs4_client
*clp
)
6398 u64 count
= nfsd_foreach_client_openowner(clp
, 0, NULL
, NULL
);
6400 nfsd_print_count(clp
, count
, "openowners");
6405 nfsd_collect_client_openowners(struct nfs4_client
*clp
,
6406 struct list_head
*collect
, u64 max
)
6408 return nfsd_foreach_client_openowner(clp
, max
, collect
,
6409 unhash_openowner_locked
);
6413 nfsd_inject_print_openowners(void)
6415 struct nfs4_client
*clp
;
6417 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6420 if (!nfsd_netns_ready(nn
))
6423 spin_lock(&nn
->client_lock
);
6424 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6425 count
+= nfsd_print_client_openowners(clp
);
6426 spin_unlock(&nn
->client_lock
);
6432 nfsd_reap_openowners(struct list_head
*reaplist
)
6434 struct nfs4_client
*clp
;
6435 struct nfs4_openowner
*oop
, *next
;
6437 list_for_each_entry_safe(oop
, next
, reaplist
, oo_perclient
) {
6438 list_del_init(&oop
->oo_perclient
);
6439 clp
= oop
->oo_owner
.so_client
;
6440 release_openowner(oop
);
6446 nfsd_inject_forget_client_openowners(struct sockaddr_storage
*addr
,
6449 unsigned int count
= 0;
6450 struct nfs4_client
*clp
;
6451 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6453 LIST_HEAD(reaplist
);
6455 if (!nfsd_netns_ready(nn
))
6458 spin_lock(&nn
->client_lock
);
6459 clp
= nfsd_find_client(addr
, addr_size
);
6461 count
= nfsd_collect_client_openowners(clp
, &reaplist
, 0);
6462 spin_unlock(&nn
->client_lock
);
6463 nfsd_reap_openowners(&reaplist
);
6468 nfsd_inject_forget_openowners(u64 max
)
6471 struct nfs4_client
*clp
;
6472 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6474 LIST_HEAD(reaplist
);
6476 if (!nfsd_netns_ready(nn
))
6479 spin_lock(&nn
->client_lock
);
6480 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6481 count
+= nfsd_collect_client_openowners(clp
, &reaplist
,
6483 if (max
!= 0 && count
>= max
)
6486 spin_unlock(&nn
->client_lock
);
6487 nfsd_reap_openowners(&reaplist
);
6491 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
6492 struct list_head
*victims
)
6494 struct nfs4_delegation
*dp
, *next
;
6495 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6499 lockdep_assert_held(&nn
->client_lock
);
6501 spin_lock(&state_lock
);
6502 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
6505 * It's not safe to mess with delegations that have a
6506 * non-zero dl_time. They might have already been broken
6507 * and could be processed by the laundromat outside of
6508 * the state_lock. Just leave them be.
6510 if (dp
->dl_time
!= 0)
6513 atomic_inc(&clp
->cl_refcount
);
6514 WARN_ON(!unhash_delegation_locked(dp
));
6515 list_add(&dp
->dl_recall_lru
, victims
);
6519 * Despite the fact that these functions deal with
6520 * 64-bit integers for "count", we must ensure that
6521 * it doesn't blow up the clp->cl_refcount. Throw a
6522 * warning if we start to approach INT_MAX here.
6524 WARN_ON_ONCE(count
== (INT_MAX
/ 2));
6528 spin_unlock(&state_lock
);
6533 nfsd_print_client_delegations(struct nfs4_client
*clp
)
6535 u64 count
= nfsd_find_all_delegations(clp
, 0, NULL
);
6537 nfsd_print_count(clp
, count
, "delegations");
6542 nfsd_inject_print_delegations(void)
6544 struct nfs4_client
*clp
;
6546 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6549 if (!nfsd_netns_ready(nn
))
6552 spin_lock(&nn
->client_lock
);
6553 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
)
6554 count
+= nfsd_print_client_delegations(clp
);
6555 spin_unlock(&nn
->client_lock
);
6561 nfsd_forget_delegations(struct list_head
*reaplist
)
6563 struct nfs4_client
*clp
;
6564 struct nfs4_delegation
*dp
, *next
;
6566 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6567 list_del_init(&dp
->dl_recall_lru
);
6568 clp
= dp
->dl_stid
.sc_client
;
6569 revoke_delegation(dp
);
6575 nfsd_inject_forget_client_delegations(struct sockaddr_storage
*addr
,
6579 struct nfs4_client
*clp
;
6580 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6582 LIST_HEAD(reaplist
);
6584 if (!nfsd_netns_ready(nn
))
6587 spin_lock(&nn
->client_lock
);
6588 clp
= nfsd_find_client(addr
, addr_size
);
6590 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6591 spin_unlock(&nn
->client_lock
);
6593 nfsd_forget_delegations(&reaplist
);
6598 nfsd_inject_forget_delegations(u64 max
)
6601 struct nfs4_client
*clp
;
6602 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6604 LIST_HEAD(reaplist
);
6606 if (!nfsd_netns_ready(nn
))
6609 spin_lock(&nn
->client_lock
);
6610 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
6611 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6612 if (max
!= 0 && count
>= max
)
6615 spin_unlock(&nn
->client_lock
);
6616 nfsd_forget_delegations(&reaplist
);
6621 nfsd_recall_delegations(struct list_head
*reaplist
)
6623 struct nfs4_client
*clp
;
6624 struct nfs4_delegation
*dp
, *next
;
6626 list_for_each_entry_safe(dp
, next
, reaplist
, dl_recall_lru
) {
6627 list_del_init(&dp
->dl_recall_lru
);
6628 clp
= dp
->dl_stid
.sc_client
;
6630 * We skipped all entries that had a zero dl_time before,
6631 * so we can now reset the dl_time back to 0. If a delegation
6632 * break comes in now, then it won't make any difference since
6633 * we're recalling it either way.
6635 spin_lock(&state_lock
);
6637 spin_unlock(&state_lock
);
6638 nfsd_break_one_deleg(dp
);
6644 nfsd_inject_recall_client_delegations(struct sockaddr_storage
*addr
,
6648 struct nfs4_client
*clp
;
6649 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6651 LIST_HEAD(reaplist
);
6653 if (!nfsd_netns_ready(nn
))
6656 spin_lock(&nn
->client_lock
);
6657 clp
= nfsd_find_client(addr
, addr_size
);
6659 count
= nfsd_find_all_delegations(clp
, 0, &reaplist
);
6660 spin_unlock(&nn
->client_lock
);
6662 nfsd_recall_delegations(&reaplist
);
6667 nfsd_inject_recall_delegations(u64 max
)
6670 struct nfs4_client
*clp
, *next
;
6671 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
,
6673 LIST_HEAD(reaplist
);
6675 if (!nfsd_netns_ready(nn
))
6678 spin_lock(&nn
->client_lock
);
6679 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
6680 count
+= nfsd_find_all_delegations(clp
, max
- count
, &reaplist
);
6681 if (max
!= 0 && ++count
>= max
)
6684 spin_unlock(&nn
->client_lock
);
6685 nfsd_recall_delegations(&reaplist
);
6688 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6691 * Since the lifetime of a delegation isn't limited to that of an open, a
6692 * client may quite reasonably hang on to a delegation as long as it has
6693 * the inode cached. This becomes an obvious problem the first time a
6694 * client's inode cache approaches the size of the server's total memory.
6696 * For now we avoid this problem by imposing a hard limit on the number
6697 * of delegations, which varies according to the server's memory size.
6700 set_max_delegations(void)
6703 * Allow at most 4 delegations per megabyte of RAM. Quick
6704 * estimates suggest that in the worst case (where every delegation
6705 * is for a different inode), a delegation could take about 1.5K,
6706 * giving a worst case usage of about 6% of memory.
6708 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
6711 static int nfs4_state_create_net(struct net
*net
)
6713 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6716 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6717 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6718 if (!nn
->conf_id_hashtbl
)
6720 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
6721 CLIENT_HASH_SIZE
, GFP_KERNEL
);
6722 if (!nn
->unconf_id_hashtbl
)
6724 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
6725 SESSION_HASH_SIZE
, GFP_KERNEL
);
6726 if (!nn
->sessionid_hashtbl
)
6729 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6730 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
6731 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
6733 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
6734 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
6735 nn
->conf_name_tree
= RB_ROOT
;
6736 nn
->unconf_name_tree
= RB_ROOT
;
6737 INIT_LIST_HEAD(&nn
->client_lru
);
6738 INIT_LIST_HEAD(&nn
->close_lru
);
6739 INIT_LIST_HEAD(&nn
->del_recall_lru
);
6740 spin_lock_init(&nn
->client_lock
);
6742 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
6748 kfree(nn
->unconf_id_hashtbl
);
6750 kfree(nn
->conf_id_hashtbl
);
6756 nfs4_state_destroy_net(struct net
*net
)
6759 struct nfs4_client
*clp
= NULL
;
6760 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6762 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6763 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
6764 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6765 destroy_client(clp
);
6769 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
6770 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
6771 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
6772 destroy_client(clp
);
6776 kfree(nn
->sessionid_hashtbl
);
6777 kfree(nn
->unconf_id_hashtbl
);
6778 kfree(nn
->conf_id_hashtbl
);
6783 nfs4_state_start_net(struct net
*net
)
6785 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6788 ret
= nfs4_state_create_net(net
);
6791 nn
->boot_time
= get_seconds();
6792 nn
->grace_ended
= false;
6793 nn
->nfsd4_manager
.block_opens
= true;
6794 locks_start_grace(net
, &nn
->nfsd4_manager
);
6795 nfsd4_client_tracking_init(net
);
6796 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
6797 nn
->nfsd4_grace
, net
);
6798 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
6802 /* initialization to perform when the nfsd service is started: */
6805 nfs4_state_start(void)
6809 ret
= set_callback_cred();
6812 laundry_wq
= alloc_workqueue("%s", WQ_UNBOUND
, 0, "nfsd4");
6813 if (laundry_wq
== NULL
) {
6817 ret
= nfsd4_create_callback_queue();
6819 goto out_free_laundry
;
6821 set_max_delegations();
6826 destroy_workqueue(laundry_wq
);
6832 nfs4_state_shutdown_net(struct net
*net
)
6834 struct nfs4_delegation
*dp
= NULL
;
6835 struct list_head
*pos
, *next
, reaplist
;
6836 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
6838 cancel_delayed_work_sync(&nn
->laundromat_work
);
6839 locks_end_grace(&nn
->nfsd4_manager
);
6841 INIT_LIST_HEAD(&reaplist
);
6842 spin_lock(&state_lock
);
6843 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
6844 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6845 WARN_ON(!unhash_delegation_locked(dp
));
6846 list_add(&dp
->dl_recall_lru
, &reaplist
);
6848 spin_unlock(&state_lock
);
6849 list_for_each_safe(pos
, next
, &reaplist
) {
6850 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
6851 list_del_init(&dp
->dl_recall_lru
);
6852 put_clnt_odstate(dp
->dl_clnt_odstate
);
6853 nfs4_put_deleg_lease(dp
->dl_stid
.sc_file
);
6854 nfs4_put_stid(&dp
->dl_stid
);
6857 nfsd4_client_tracking_exit(net
);
6858 nfs4_state_destroy_net(net
);
6862 nfs4_state_shutdown(void)
6864 destroy_workqueue(laundry_wq
);
6865 nfsd4_destroy_callback_queue();
6869 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6871 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
6872 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
6876 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
6878 if (cstate
->minorversion
) {
6879 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
6880 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6885 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
6887 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
6891 * functions to set current state id
6894 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6896 put_stateid(cstate
, &odp
->od_stateid
);
6900 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
6902 put_stateid(cstate
, &open
->op_stateid
);
6906 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6908 put_stateid(cstate
, &close
->cl_stateid
);
6912 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
6914 put_stateid(cstate
, &lock
->lk_resp_stateid
);
6918 * functions to consume current state id
6922 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
6924 get_stateid(cstate
, &odp
->od_stateid
);
6928 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
6930 get_stateid(cstate
, &drp
->dr_stateid
);
6934 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
6936 get_stateid(cstate
, &fsp
->fr_stateid
);
6940 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
6942 get_stateid(cstate
, &setattr
->sa_stateid
);
6946 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
6948 get_stateid(cstate
, &close
->cl_stateid
);
6952 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
6954 get_stateid(cstate
, &locku
->lu_stateid
);
6958 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
6960 get_stateid(cstate
, &read
->rd_stateid
);
6964 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
6966 get_stateid(cstate
, &write
->wr_stateid
);