2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/hash.h>
48 #include "current_stateid.h"
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 #define all_ones {{~0,~0},~0}
55 static const stateid_t one_stateid
= {
57 .si_opaque
= all_ones
,
59 static const stateid_t zero_stateid
= {
62 static const stateid_t currentstateid
= {
66 static u64 current_sessionid
= 1;
68 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
69 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
70 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
77 /* Currently used for almost all code touching nfsv4 state: */
78 static DEFINE_MUTEX(client_mutex
);
81 * Currently used for the del_recall_lru and file hash table. In an
82 * effort to decrease the scope of the client_mutex, this spinlock may
83 * eventually cover more:
85 static DEFINE_SPINLOCK(state_lock
);
87 static struct kmem_cache
*openowner_slab
;
88 static struct kmem_cache
*lockowner_slab
;
89 static struct kmem_cache
*file_slab
;
90 static struct kmem_cache
*stateid_slab
;
91 static struct kmem_cache
*deleg_slab
;
96 mutex_lock(&client_mutex
);
99 static void free_session(struct nfsd4_session
*);
101 static bool is_session_dead(struct nfsd4_session
*ses
)
103 return ses
->se_flags
& NFS4_SESSION_DEAD
;
106 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
108 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
109 return nfserr_jukebox
;
110 ses
->se_flags
|= NFS4_SESSION_DEAD
;
115 nfs4_unlock_state(void)
117 mutex_unlock(&client_mutex
);
120 static bool is_client_expired(struct nfs4_client
*clp
)
122 return clp
->cl_time
== 0;
125 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
127 if (atomic_read(&clp
->cl_refcount
))
128 return nfserr_jukebox
;
133 static __be32
mark_client_expired(struct nfs4_client
*clp
)
135 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
138 spin_lock(&nn
->client_lock
);
139 ret
= mark_client_expired_locked(clp
);
140 spin_unlock(&nn
->client_lock
);
144 static __be32
get_client_locked(struct nfs4_client
*clp
)
146 if (is_client_expired(clp
))
147 return nfserr_expired
;
148 atomic_inc(&clp
->cl_refcount
);
152 /* must be called under the client_lock */
154 renew_client_locked(struct nfs4_client
*clp
)
156 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
158 if (is_client_expired(clp
)) {
160 printk("%s: client (clientid %08x/%08x) already expired\n",
162 clp
->cl_clientid
.cl_boot
,
163 clp
->cl_clientid
.cl_id
);
167 dprintk("renewing client (clientid %08x/%08x)\n",
168 clp
->cl_clientid
.cl_boot
,
169 clp
->cl_clientid
.cl_id
);
170 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
171 clp
->cl_time
= get_seconds();
175 renew_client(struct nfs4_client
*clp
)
177 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
179 spin_lock(&nn
->client_lock
);
180 renew_client_locked(clp
);
181 spin_unlock(&nn
->client_lock
);
184 static void put_client_renew_locked(struct nfs4_client
*clp
)
186 if (!atomic_dec_and_test(&clp
->cl_refcount
))
188 if (!is_client_expired(clp
))
189 renew_client_locked(clp
);
192 static void put_client_renew(struct nfs4_client
*clp
)
194 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
196 spin_lock(&nn
->client_lock
);
197 put_client_renew_locked(clp
);
198 spin_unlock(&nn
->client_lock
);
201 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
205 if (is_session_dead(ses
))
206 return nfserr_badsession
;
207 status
= get_client_locked(ses
->se_client
);
210 atomic_inc(&ses
->se_ref
);
214 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
216 struct nfs4_client
*clp
= ses
->se_client
;
218 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
220 put_client_renew_locked(clp
);
223 static void nfsd4_put_session(struct nfsd4_session
*ses
)
225 struct nfs4_client
*clp
= ses
->se_client
;
226 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
228 spin_lock(&nn
->client_lock
);
229 nfsd4_put_session_locked(ses
);
230 spin_unlock(&nn
->client_lock
);
235 opaque_hashval(const void *ptr
, int nbytes
)
237 unsigned char *cptr
= (unsigned char *) ptr
;
247 static void nfsd4_free_file(struct nfs4_file
*f
)
249 kmem_cache_free(file_slab
, f
);
253 put_nfs4_file(struct nfs4_file
*fi
)
255 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
256 hlist_del(&fi
->fi_hash
);
257 spin_unlock(&state_lock
);
264 get_nfs4_file(struct nfs4_file
*fi
)
266 atomic_inc(&fi
->fi_ref
);
269 static int num_delegations
;
270 unsigned long max_delegations
;
273 * Open owner state (share locks)
276 /* hash tables for lock and open owners */
277 #define OWNER_HASH_BITS 8
278 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
279 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
281 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
285 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
287 return ret
& OWNER_HASH_MASK
;
290 /* hash table for nfs4_file */
291 #define FILE_HASH_BITS 8
292 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
294 static unsigned int file_hashval(struct inode
*ino
)
296 /* XXX: why are we hashing on inode pointer, anyway? */
297 return hash_ptr(ino
, FILE_HASH_BITS
);
300 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
302 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
304 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
305 atomic_inc(&fp
->fi_access
[oflag
]);
308 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
310 if (oflag
== O_RDWR
) {
311 __nfs4_file_get_access(fp
, O_RDONLY
);
312 __nfs4_file_get_access(fp
, O_WRONLY
);
314 __nfs4_file_get_access(fp
, oflag
);
317 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
319 if (fp
->fi_fds
[oflag
]) {
320 fput(fp
->fi_fds
[oflag
]);
321 fp
->fi_fds
[oflag
] = NULL
;
325 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
327 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
328 nfs4_file_put_fd(fp
, oflag
);
329 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
330 nfs4_file_put_fd(fp
, O_RDWR
);
334 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
336 if (oflag
== O_RDWR
) {
337 __nfs4_file_put_access(fp
, O_RDONLY
);
338 __nfs4_file_put_access(fp
, O_WRONLY
);
340 __nfs4_file_put_access(fp
, oflag
);
343 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
346 struct idr
*stateids
= &cl
->cl_stateids
;
347 struct nfs4_stid
*stid
;
350 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
354 new_id
= idr_alloc_cyclic(stateids
, stid
, 0, 0, GFP_KERNEL
);
357 stid
->sc_client
= cl
;
359 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
360 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
361 /* Will be incremented before return to client: */
362 stid
->sc_stateid
.si_generation
= 0;
365 * It shouldn't be a problem to reuse an opaque stateid value.
366 * I don't think it is for 4.1. But with 4.0 I worry that, for
367 * example, a stray write retransmission could be accepted by
368 * the server when it should have been rejected. Therefore,
369 * adopt a trick from the sctp code to attempt to maximize the
370 * amount of time until an id is reused, by ensuring they always
371 * "increase" (mod INT_MAX):
375 kmem_cache_free(slab
, stid
);
379 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
381 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
385 * When we recall a delegation, we should be careful not to hand it
386 * out again straight away.
387 * To ensure this we keep a pair of bloom filters ('new' and 'old')
388 * in which the filehandles of recalled delegations are "stored".
389 * If a filehandle appear in either filter, a delegation is blocked.
390 * When a delegation is recalled, the filehandle is stored in the "new"
392 * Every 30 seconds we swap the filters and clear the "new" one,
393 * unless both are empty of course.
395 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
396 * low 3 bytes as hash-table indices.
398 * 'state_lock', which is always held when block_delegations() is called,
399 * is used to manage concurrent access. Testing does not need the lock
400 * except when swapping the two filters.
402 static struct bloom_pair
{
403 int entries
, old_entries
;
405 int new; /* index into 'set' */
406 DECLARE_BITMAP(set
[2], 256);
407 } blocked_delegations
;
409 static int delegation_blocked(struct knfsd_fh
*fh
)
412 struct bloom_pair
*bd
= &blocked_delegations
;
414 if (bd
->entries
== 0)
416 if (seconds_since_boot() - bd
->swap_time
> 30) {
417 spin_lock(&state_lock
);
418 if (seconds_since_boot() - bd
->swap_time
> 30) {
419 bd
->entries
-= bd
->old_entries
;
420 bd
->old_entries
= bd
->entries
;
421 memset(bd
->set
[bd
->new], 0,
424 bd
->swap_time
= seconds_since_boot();
426 spin_unlock(&state_lock
);
428 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
429 if (test_bit(hash
&255, bd
->set
[0]) &&
430 test_bit((hash
>>8)&255, bd
->set
[0]) &&
431 test_bit((hash
>>16)&255, bd
->set
[0]))
434 if (test_bit(hash
&255, bd
->set
[1]) &&
435 test_bit((hash
>>8)&255, bd
->set
[1]) &&
436 test_bit((hash
>>16)&255, bd
->set
[1]))
442 static void block_delegations(struct knfsd_fh
*fh
)
445 struct bloom_pair
*bd
= &blocked_delegations
;
447 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
449 __set_bit(hash
&255, bd
->set
[bd
->new]);
450 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
451 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
452 if (bd
->entries
== 0)
453 bd
->swap_time
= seconds_since_boot();
457 static struct nfs4_delegation
*
458 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
)
460 struct nfs4_delegation
*dp
;
462 dprintk("NFSD alloc_init_deleg\n");
463 if (num_delegations
> max_delegations
)
465 if (delegation_blocked(¤t_fh
->fh_handle
))
467 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
471 * delegation seqid's are never incremented. The 4.1 special
472 * meaning of seqid 0 isn't meaningful, really, but let's avoid
473 * 0 anyway just for consistency and use 1:
475 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
477 INIT_LIST_HEAD(&dp
->dl_perfile
);
478 INIT_LIST_HEAD(&dp
->dl_perclnt
);
479 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
481 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
482 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
484 atomic_set(&dp
->dl_count
, 1);
485 nfsd4_init_callback(&dp
->dl_recall
);
489 static void remove_stid(struct nfs4_stid
*s
)
491 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
493 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
496 static void nfs4_free_stid(struct kmem_cache
*slab
, struct nfs4_stid
*s
)
498 kmem_cache_free(slab
, s
);
502 nfs4_put_delegation(struct nfs4_delegation
*dp
)
504 if (atomic_dec_and_test(&dp
->dl_count
)) {
505 nfs4_free_stid(deleg_slab
, &dp
->dl_stid
);
510 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
514 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
515 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
517 fput(fp
->fi_deleg_file
);
518 fp
->fi_deleg_file
= NULL
;
522 static void unhash_stid(struct nfs4_stid
*s
)
528 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
530 lockdep_assert_held(&state_lock
);
532 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
533 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
534 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
537 /* Called under the state lock. */
539 unhash_delegation(struct nfs4_delegation
*dp
)
541 spin_lock(&state_lock
);
542 list_del_init(&dp
->dl_perclnt
);
543 list_del_init(&dp
->dl_perfile
);
544 list_del_init(&dp
->dl_recall_lru
);
545 spin_unlock(&state_lock
);
547 nfs4_put_deleg_lease(dp
->dl_file
);
548 put_nfs4_file(dp
->dl_file
);
555 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
557 list_del_init(&dp
->dl_recall_lru
);
558 remove_stid(&dp
->dl_stid
);
559 nfs4_put_delegation(dp
);
562 static void destroy_delegation(struct nfs4_delegation
*dp
)
564 unhash_delegation(dp
);
565 remove_stid(&dp
->dl_stid
);
566 nfs4_put_delegation(dp
);
569 static void revoke_delegation(struct nfs4_delegation
*dp
)
571 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
573 if (clp
->cl_minorversion
== 0)
574 destroy_delegation(dp
);
576 unhash_delegation(dp
);
577 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
578 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
586 static unsigned int clientid_hashval(u32 id
)
588 return id
& CLIENT_HASH_MASK
;
591 static unsigned int clientstr_hashval(const char *name
)
593 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
597 * We store the NONE, READ, WRITE, and BOTH bits separately in the
598 * st_{access,deny}_bmap field of the stateid, in order to track not
599 * only what share bits are currently in force, but also what
600 * combinations of share bits previous opens have used. This allows us
601 * to enforce the recommendation of rfc 3530 14.2.19 that the server
602 * return an error if the client attempt to downgrade to a combination
603 * of share bits not explicable by closing some of its previous opens.
605 * XXX: This enforcement is actually incomplete, since we don't keep
606 * track of access/deny bit combinations; so, e.g., we allow:
608 * OPEN allow read, deny write
609 * OPEN allow both, deny none
610 * DOWNGRADE allow read, deny none
612 * which we should reject.
615 bmap_to_share_mode(unsigned long bmap
) {
617 unsigned int access
= 0;
619 for (i
= 1; i
< 4; i
++) {
620 if (test_bit(i
, &bmap
))
627 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
628 unsigned int access
, deny
;
630 access
= bmap_to_share_mode(stp
->st_access_bmap
);
631 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
632 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
637 /* set share access for a given stateid */
639 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
641 __set_bit(access
, &stp
->st_access_bmap
);
644 /* clear share access for a given stateid */
646 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
648 __clear_bit(access
, &stp
->st_access_bmap
);
651 /* test whether a given stateid has access */
653 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
655 return test_bit(access
, &stp
->st_access_bmap
);
658 /* set share deny for a given stateid */
660 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
662 __set_bit(access
, &stp
->st_deny_bmap
);
665 /* clear share deny for a given stateid */
667 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
669 __clear_bit(access
, &stp
->st_deny_bmap
);
672 /* test whether a given stateid is denying specific access */
674 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
676 return test_bit(access
, &stp
->st_deny_bmap
);
679 static int nfs4_access_to_omode(u32 access
)
681 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
682 case NFS4_SHARE_ACCESS_READ
:
684 case NFS4_SHARE_ACCESS_WRITE
:
686 case NFS4_SHARE_ACCESS_BOTH
:
693 /* release all access and file references for a given stateid */
695 release_all_access(struct nfs4_ol_stateid
*stp
)
699 for (i
= 1; i
< 4; i
++) {
700 if (test_access(i
, stp
))
701 nfs4_file_put_access(stp
->st_file
,
702 nfs4_access_to_omode(i
));
703 clear_access(i
, stp
);
707 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
709 list_del(&stp
->st_perfile
);
710 list_del(&stp
->st_perstateowner
);
713 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
715 release_all_access(stp
);
716 put_nfs4_file(stp
->st_file
);
720 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
722 remove_stid(&stp
->st_stid
);
723 nfs4_free_stid(stateid_slab
, &stp
->st_stid
);
726 static void __release_lock_stateid(struct nfs4_ol_stateid
*stp
)
730 list_del(&stp
->st_locks
);
731 unhash_generic_stateid(stp
);
732 unhash_stid(&stp
->st_stid
);
733 file
= find_any_file(stp
->st_file
);
735 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
736 close_generic_stateid(stp
);
737 free_generic_stateid(stp
);
740 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
742 struct nfs4_ol_stateid
*stp
;
744 list_del(&lo
->lo_owner
.so_strhash
);
745 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
746 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
747 struct nfs4_ol_stateid
, st_perstateowner
);
748 __release_lock_stateid(stp
);
752 static void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
754 kfree(lo
->lo_owner
.so_owner
.data
);
755 kmem_cache_free(lockowner_slab
, lo
);
758 static void release_lockowner(struct nfs4_lockowner
*lo
)
760 unhash_lockowner(lo
);
761 nfs4_free_lockowner(lo
);
764 static void release_lockowner_if_empty(struct nfs4_lockowner
*lo
)
766 if (list_empty(&lo
->lo_owner
.so_stateids
))
767 release_lockowner(lo
);
770 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
772 struct nfs4_lockowner
*lo
;
774 lo
= lockowner(stp
->st_stateowner
);
775 __release_lock_stateid(stp
);
776 release_lockowner_if_empty(lo
);
779 static void release_open_stateid_locks(struct nfs4_ol_stateid
*open_stp
)
781 struct nfs4_ol_stateid
*stp
;
783 while (!list_empty(&open_stp
->st_locks
)) {
784 stp
= list_entry(open_stp
->st_locks
.next
,
785 struct nfs4_ol_stateid
, st_locks
);
786 release_lock_stateid(stp
);
790 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
792 unhash_generic_stateid(stp
);
793 release_open_stateid_locks(stp
);
794 close_generic_stateid(stp
);
797 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
799 unhash_open_stateid(stp
);
800 free_generic_stateid(stp
);
803 static void unhash_openowner(struct nfs4_openowner
*oo
)
805 struct nfs4_ol_stateid
*stp
;
807 list_del(&oo
->oo_owner
.so_strhash
);
808 list_del(&oo
->oo_perclient
);
809 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
810 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
811 struct nfs4_ol_stateid
, st_perstateowner
);
812 release_open_stateid(stp
);
816 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
818 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
821 free_generic_stateid(s
);
822 oo
->oo_last_closed_stid
= NULL
;
826 static void nfs4_free_openowner(struct nfs4_openowner
*oo
)
828 kfree(oo
->oo_owner
.so_owner
.data
);
829 kmem_cache_free(openowner_slab
, oo
);
832 static void release_openowner(struct nfs4_openowner
*oo
)
834 unhash_openowner(oo
);
835 list_del(&oo
->oo_close_lru
);
836 release_last_closed_stateid(oo
);
837 nfs4_free_openowner(oo
);
841 hash_sessionid(struct nfs4_sessionid
*sessionid
)
843 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
845 return sid
->sequence
% SESSION_HASH_SIZE
;
850 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
852 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
853 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
857 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
863 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
864 * won't be used for replay.
866 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
868 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
870 if (nfserr
== nfserr_replay_me
)
873 if (!seqid_mutating_err(ntohl(nfserr
))) {
874 cstate
->replay_owner
= NULL
;
879 if (so
->so_is_open_owner
)
880 release_last_closed_stateid(openowner(so
));
886 gen_sessionid(struct nfsd4_session
*ses
)
888 struct nfs4_client
*clp
= ses
->se_client
;
889 struct nfsd4_sessionid
*sid
;
891 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
892 sid
->clientid
= clp
->cl_clientid
;
893 sid
->sequence
= current_sessionid
++;
898 * The protocol defines ca_maxresponssize_cached to include the size of
899 * the rpc header, but all we need to cache is the data starting after
900 * the end of the initial SEQUENCE operation--the rest we regenerate
901 * each time. Therefore we can advertise a ca_maxresponssize_cached
902 * value that is the number of bytes in our cache plus a few additional
903 * bytes. In order to stay on the safe side, and not promise more than
904 * we can cache, those additional bytes must be the minimum possible: 24
905 * bytes of rpc header (xid through accept state, with AUTH_NULL
906 * verifier), 12 for the compound header (with zero-length tag), and 44
907 * for the SEQUENCE op response:
909 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
912 free_session_slots(struct nfsd4_session
*ses
)
916 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
917 kfree(ses
->se_slots
[i
]);
921 * We don't actually need to cache the rpc and session headers, so we
922 * can allocate a little less for each slot:
924 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
928 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
931 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
932 return size
+ sizeof(struct nfsd4_slot
);
936 * XXX: If we run out of reserved DRC memory we could (up to a point)
937 * re-negotiate active sessions and reduce their slot usage to make
938 * room for new connections. For now we just fail the create session.
940 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
942 u32 slotsize
= slot_bytes(ca
);
943 u32 num
= ca
->maxreqs
;
946 spin_lock(&nfsd_drc_lock
);
947 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
948 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
949 num
= min_t(int, num
, avail
/ slotsize
);
950 nfsd_drc_mem_used
+= num
* slotsize
;
951 spin_unlock(&nfsd_drc_lock
);
956 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
958 int slotsize
= slot_bytes(ca
);
960 spin_lock(&nfsd_drc_lock
);
961 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
962 spin_unlock(&nfsd_drc_lock
);
965 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
966 struct nfsd4_channel_attrs
*battrs
)
968 int numslots
= fattrs
->maxreqs
;
969 int slotsize
= slot_bytes(fattrs
);
970 struct nfsd4_session
*new;
973 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
974 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
975 mem
= numslots
* sizeof(struct nfsd4_slot
*);
977 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
980 /* allocate each struct nfsd4_slot and data cache in one piece */
981 for (i
= 0; i
< numslots
; i
++) {
982 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
983 if (!new->se_slots
[i
])
987 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
988 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
993 kfree(new->se_slots
[i
]);
998 static void free_conn(struct nfsd4_conn
*c
)
1000 svc_xprt_put(c
->cn_xprt
);
1004 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
1006 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
1007 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
1009 spin_lock(&clp
->cl_lock
);
1010 if (!list_empty(&c
->cn_persession
)) {
1011 list_del(&c
->cn_persession
);
1014 nfsd4_probe_callback(clp
);
1015 spin_unlock(&clp
->cl_lock
);
1018 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
1020 struct nfsd4_conn
*conn
;
1022 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
1025 svc_xprt_get(rqstp
->rq_xprt
);
1026 conn
->cn_xprt
= rqstp
->rq_xprt
;
1027 conn
->cn_flags
= flags
;
1028 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1032 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1034 conn
->cn_session
= ses
;
1035 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1038 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1040 struct nfs4_client
*clp
= ses
->se_client
;
1042 spin_lock(&clp
->cl_lock
);
1043 __nfsd4_hash_conn(conn
, ses
);
1044 spin_unlock(&clp
->cl_lock
);
1047 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1049 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1050 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1053 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1057 nfsd4_hash_conn(conn
, ses
);
1058 ret
= nfsd4_register_conn(conn
);
1060 /* oops; xprt is already down: */
1061 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1062 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
1063 /* callback channel may be back up */
1064 nfsd4_probe_callback(ses
->se_client
);
1068 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1070 u32 dir
= NFS4_CDFC4_FORE
;
1072 if (cses
->flags
& SESSION4_BACK_CHAN
)
1073 dir
|= NFS4_CDFC4_BACK
;
1074 return alloc_conn(rqstp
, dir
);
1077 /* must be called under client_lock */
1078 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1080 struct nfs4_client
*clp
= s
->se_client
;
1081 struct nfsd4_conn
*c
;
1083 spin_lock(&clp
->cl_lock
);
1084 while (!list_empty(&s
->se_conns
)) {
1085 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1086 list_del_init(&c
->cn_persession
);
1087 spin_unlock(&clp
->cl_lock
);
1089 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1092 spin_lock(&clp
->cl_lock
);
1094 spin_unlock(&clp
->cl_lock
);
1097 static void __free_session(struct nfsd4_session
*ses
)
1099 free_session_slots(ses
);
1103 static void free_session(struct nfsd4_session
*ses
)
1105 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
1107 lockdep_assert_held(&nn
->client_lock
);
1108 nfsd4_del_conns(ses
);
1109 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1110 __free_session(ses
);
1113 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1116 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1118 new->se_client
= clp
;
1121 INIT_LIST_HEAD(&new->se_conns
);
1123 new->se_cb_seq_nr
= 1;
1124 new->se_flags
= cses
->flags
;
1125 new->se_cb_prog
= cses
->callback_prog
;
1126 new->se_cb_sec
= cses
->cb_sec
;
1127 atomic_set(&new->se_ref
, 0);
1128 idx
= hash_sessionid(&new->se_sessionid
);
1129 spin_lock(&nn
->client_lock
);
1130 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1131 spin_lock(&clp
->cl_lock
);
1132 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1133 spin_unlock(&clp
->cl_lock
);
1134 spin_unlock(&nn
->client_lock
);
1136 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1137 struct sockaddr
*sa
= svc_addr(rqstp
);
1139 * This is a little silly; with sessions there's no real
1140 * use for the callback address. Use the peer address
1141 * as a reasonable default for now, but consider fixing
1142 * the rpc client not to require an address in the
1145 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1146 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1150 /* caller must hold client_lock */
1151 static struct nfsd4_session
*
1152 __find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1154 struct nfsd4_session
*elem
;
1156 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1158 dump_sessionid(__func__
, sessionid
);
1159 idx
= hash_sessionid(sessionid
);
1160 /* Search in the appropriate list */
1161 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1162 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1163 NFS4_MAX_SESSIONID_LEN
)) {
1168 dprintk("%s: session not found\n", __func__
);
1172 static struct nfsd4_session
*
1173 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
,
1176 struct nfsd4_session
*session
;
1177 __be32 status
= nfserr_badsession
;
1179 session
= __find_in_sessionid_hashtbl(sessionid
, net
);
1182 status
= nfsd4_get_session_locked(session
);
1190 /* caller must hold client_lock */
1192 unhash_session(struct nfsd4_session
*ses
)
1194 list_del(&ses
->se_hash
);
1195 spin_lock(&ses
->se_client
->cl_lock
);
1196 list_del(&ses
->se_perclnt
);
1197 spin_unlock(&ses
->se_client
->cl_lock
);
1200 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1202 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1204 if (clid
->cl_boot
== nn
->boot_time
)
1206 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1207 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1212 * XXX Should we use a slab cache ?
1213 * This type of memory management is somewhat inefficient, but we use it
1214 * anyway since SETCLIENTID is not a common operation.
1216 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1218 struct nfs4_client
*clp
;
1220 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1223 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1224 if (clp
->cl_name
.data
== NULL
) {
1228 clp
->cl_name
.len
= name
.len
;
1229 INIT_LIST_HEAD(&clp
->cl_sessions
);
1230 idr_init(&clp
->cl_stateids
);
1231 atomic_set(&clp
->cl_refcount
, 0);
1232 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1233 INIT_LIST_HEAD(&clp
->cl_idhash
);
1234 INIT_LIST_HEAD(&clp
->cl_openowners
);
1235 INIT_LIST_HEAD(&clp
->cl_delegations
);
1236 INIT_LIST_HEAD(&clp
->cl_lru
);
1237 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1238 INIT_LIST_HEAD(&clp
->cl_revoked
);
1239 spin_lock_init(&clp
->cl_lock
);
1240 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1245 free_client(struct nfs4_client
*clp
)
1247 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1249 lockdep_assert_held(&nn
->client_lock
);
1250 while (!list_empty(&clp
->cl_sessions
)) {
1251 struct nfsd4_session
*ses
;
1252 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1254 list_del(&ses
->se_perclnt
);
1255 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1258 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1259 free_svc_cred(&clp
->cl_cred
);
1260 kfree(clp
->cl_name
.data
);
1261 idr_destroy(&clp
->cl_stateids
);
1265 /* must be called under the client_lock */
1267 unhash_client_locked(struct nfs4_client
*clp
)
1269 struct nfsd4_session
*ses
;
1271 list_del(&clp
->cl_lru
);
1272 spin_lock(&clp
->cl_lock
);
1273 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1274 list_del_init(&ses
->se_hash
);
1275 spin_unlock(&clp
->cl_lock
);
1279 destroy_client(struct nfs4_client
*clp
)
1281 struct nfs4_openowner
*oo
;
1282 struct nfs4_delegation
*dp
;
1283 struct list_head reaplist
;
1284 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1286 INIT_LIST_HEAD(&reaplist
);
1287 spin_lock(&state_lock
);
1288 while (!list_empty(&clp
->cl_delegations
)) {
1289 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1290 list_del_init(&dp
->dl_perclnt
);
1291 list_move(&dp
->dl_recall_lru
, &reaplist
);
1293 spin_unlock(&state_lock
);
1294 while (!list_empty(&reaplist
)) {
1295 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1296 destroy_delegation(dp
);
1298 list_splice_init(&clp
->cl_revoked
, &reaplist
);
1299 while (!list_empty(&reaplist
)) {
1300 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1301 destroy_revoked_delegation(dp
);
1303 while (!list_empty(&clp
->cl_openowners
)) {
1304 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1305 release_openowner(oo
);
1307 nfsd4_shutdown_callback(clp
);
1308 if (clp
->cl_cb_conn
.cb_xprt
)
1309 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1310 list_del(&clp
->cl_idhash
);
1311 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1312 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1314 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1315 spin_lock(&nn
->client_lock
);
1316 unhash_client_locked(clp
);
1317 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1319 spin_unlock(&nn
->client_lock
);
1322 static void expire_client(struct nfs4_client
*clp
)
1324 nfsd4_client_record_remove(clp
);
1325 destroy_client(clp
);
1328 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1330 memcpy(target
->cl_verifier
.data
, source
->data
,
1331 sizeof(target
->cl_verifier
.data
));
1334 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1336 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1337 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1340 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1342 if (source
->cr_principal
) {
1343 target
->cr_principal
=
1344 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1345 if (target
->cr_principal
== NULL
)
1348 target
->cr_principal
= NULL
;
1349 target
->cr_flavor
= source
->cr_flavor
;
1350 target
->cr_uid
= source
->cr_uid
;
1351 target
->cr_gid
= source
->cr_gid
;
1352 target
->cr_group_info
= source
->cr_group_info
;
1353 get_group_info(target
->cr_group_info
);
1354 target
->cr_gss_mech
= source
->cr_gss_mech
;
1355 if (source
->cr_gss_mech
)
1356 gss_mech_get(source
->cr_gss_mech
);
1361 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1365 res
= o1
->len
- o2
->len
;
1368 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1371 static int same_name(const char *n1
, const char *n2
)
1373 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1377 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1379 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1383 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1385 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1388 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1392 if (g1
->ngroups
!= g2
->ngroups
)
1394 for (i
=0; i
<g1
->ngroups
; i
++)
1395 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1401 * RFC 3530 language requires clid_inuse be returned when the
1402 * "principal" associated with a requests differs from that previously
1403 * used. We use uid, gid's, and gss principal string as our best
1404 * approximation. We also don't want to allow non-gss use of a client
1405 * established using gss: in theory cr_principal should catch that
1406 * change, but in practice cr_principal can be null even in the gss case
1407 * since gssd doesn't always pass down a principal string.
1409 static bool is_gss_cred(struct svc_cred
*cr
)
1411 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1412 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1417 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1419 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1420 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1421 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1422 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1424 if (cr1
->cr_principal
== cr2
->cr_principal
)
1426 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1428 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1431 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1433 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1436 if (!cr
->cr_gss_mech
)
1438 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1439 return service
== RPC_GSS_SVC_INTEGRITY
||
1440 service
== RPC_GSS_SVC_PRIVACY
;
1443 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1445 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1447 if (!cl
->cl_mach_cred
)
1449 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1451 if (!svc_rqst_integrity_protected(rqstp
))
1453 if (!cr
->cr_principal
)
1455 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1458 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1460 static u32 current_clientid
= 1;
1462 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1463 clp
->cl_clientid
.cl_id
= current_clientid
++;
1466 static void gen_confirm(struct nfs4_client
*clp
)
1472 * This is opaque to client, so no need to byte-swap. Use
1473 * __force to keep sparse happy
1475 verf
[0] = (__force __be32
)get_seconds();
1476 verf
[1] = (__force __be32
)i
++;
1477 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1480 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1482 struct nfs4_stid
*ret
;
1484 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1485 if (!ret
|| !ret
->sc_type
)
1490 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1492 struct nfs4_stid
*s
;
1494 s
= find_stateid(cl
, t
);
1497 if (typemask
& s
->sc_type
)
1502 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1503 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1505 struct nfs4_client
*clp
;
1506 struct sockaddr
*sa
= svc_addr(rqstp
);
1508 struct net
*net
= SVC_NET(rqstp
);
1509 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1511 clp
= alloc_client(name
);
1515 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1517 spin_lock(&nn
->client_lock
);
1519 spin_unlock(&nn
->client_lock
);
1522 nfsd4_init_callback(&clp
->cl_cb_null
);
1523 clp
->cl_time
= get_seconds();
1524 clear_bit(0, &clp
->cl_cb_slot_busy
);
1525 copy_verf(clp
, verf
);
1526 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1528 clp
->cl_cb_session
= NULL
;
1534 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1536 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1537 struct nfs4_client
*clp
;
1540 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1543 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1544 new = &((*new)->rb_left
);
1546 new = &((*new)->rb_right
);
1549 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1550 rb_insert_color(&new_clp
->cl_namenode
, root
);
1553 static struct nfs4_client
*
1554 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1557 struct rb_node
*node
= root
->rb_node
;
1558 struct nfs4_client
*clp
;
1561 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1562 cmp
= compare_blob(&clp
->cl_name
, name
);
1564 node
= node
->rb_left
;
1566 node
= node
->rb_right
;
1574 add_to_unconfirmed(struct nfs4_client
*clp
)
1576 unsigned int idhashval
;
1577 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1579 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1580 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1581 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1582 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1587 move_to_confirmed(struct nfs4_client
*clp
)
1589 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1590 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1592 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1593 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1594 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1595 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1596 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1600 static struct nfs4_client
*
1601 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1603 struct nfs4_client
*clp
;
1604 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1606 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1607 if (same_clid(&clp
->cl_clientid
, clid
)) {
1608 if ((bool)clp
->cl_minorversion
!= sessions
)
1617 static struct nfs4_client
*
1618 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1620 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1622 return find_client_in_id_table(tbl
, clid
, sessions
);
1625 static struct nfs4_client
*
1626 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1628 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1630 return find_client_in_id_table(tbl
, clid
, sessions
);
1633 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1635 return clp
->cl_exchange_flags
!= 0;
1638 static struct nfs4_client
*
1639 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1641 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1644 static struct nfs4_client
*
1645 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1647 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1651 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1653 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1654 struct sockaddr
*sa
= svc_addr(rqstp
);
1655 u32 scopeid
= rpc_get_scope_id(sa
);
1656 unsigned short expected_family
;
1658 /* Currently, we only support tcp and tcp6 for the callback channel */
1659 if (se
->se_callback_netid_len
== 3 &&
1660 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1661 expected_family
= AF_INET
;
1662 else if (se
->se_callback_netid_len
== 4 &&
1663 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1664 expected_family
= AF_INET6
;
1668 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1669 se
->se_callback_addr_len
,
1670 (struct sockaddr
*)&conn
->cb_addr
,
1671 sizeof(conn
->cb_addr
));
1673 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1676 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1677 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1679 conn
->cb_prog
= se
->se_callback_prog
;
1680 conn
->cb_ident
= se
->se_callback_ident
;
1681 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1684 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1685 conn
->cb_addrlen
= 0;
1686 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1687 "will not receive delegations\n",
1688 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1694 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1697 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1699 struct xdr_buf
*buf
= resp
->xdr
.buf
;
1700 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1703 dprintk("--> %s slot %p\n", __func__
, slot
);
1705 slot
->sl_opcnt
= resp
->opcnt
;
1706 slot
->sl_status
= resp
->cstate
.status
;
1708 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1709 if (nfsd4_not_cached(resp
)) {
1710 slot
->sl_datalen
= 0;
1713 base
= resp
->cstate
.data_offset
;
1714 slot
->sl_datalen
= buf
->len
- base
;
1715 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
1716 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1721 * Encode the replay sequence operation from the slot values.
1722 * If cachethis is FALSE encode the uncached rep error on the next
1723 * operation which sets resp->p and increments resp->opcnt for
1724 * nfs4svc_encode_compoundres.
1728 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1729 struct nfsd4_compoundres
*resp
)
1731 struct nfsd4_op
*op
;
1732 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1734 /* Encode the replayed sequence operation */
1735 op
= &args
->ops
[resp
->opcnt
- 1];
1736 nfsd4_encode_operation(resp
, op
);
1738 /* Return nfserr_retry_uncached_rep in next operation. */
1739 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1740 op
= &args
->ops
[resp
->opcnt
++];
1741 op
->status
= nfserr_retry_uncached_rep
;
1742 nfsd4_encode_operation(resp
, op
);
1748 * The sequence operation is not cached because we can use the slot and
1752 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1753 struct nfsd4_sequence
*seq
)
1755 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1756 struct xdr_stream
*xdr
= &resp
->xdr
;
1760 dprintk("--> %s slot %p\n", __func__
, slot
);
1762 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1766 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
1769 return nfserr_serverfault
;
1771 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
1772 xdr_commit_encode(xdr
);
1774 resp
->opcnt
= slot
->sl_opcnt
;
1775 return slot
->sl_status
;
1779 * Set the exchange_id flags returned by the server.
1782 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1784 /* pNFS is not supported */
1785 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1787 /* Referrals are supported, Migration is not. */
1788 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1790 /* set the wire flags to return to client. */
1791 clid
->flags
= new->cl_exchange_flags
;
1794 static bool client_has_state(struct nfs4_client
*clp
)
1797 * Note clp->cl_openowners check isn't quite right: there's no
1798 * need to count owners without stateid's.
1800 * Also note we should probably be using this in 4.0 case too.
1802 return !list_empty(&clp
->cl_openowners
)
1803 || !list_empty(&clp
->cl_delegations
)
1804 || !list_empty(&clp
->cl_sessions
);
1808 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1809 struct nfsd4_compound_state
*cstate
,
1810 struct nfsd4_exchange_id
*exid
)
1812 struct nfs4_client
*unconf
, *conf
, *new;
1814 char addr_str
[INET6_ADDRSTRLEN
];
1815 nfs4_verifier verf
= exid
->verifier
;
1816 struct sockaddr
*sa
= svc_addr(rqstp
);
1817 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1818 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1820 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1821 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1822 "ip_addr=%s flags %x, spa_how %d\n",
1823 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1824 addr_str
, exid
->flags
, exid
->spa_how
);
1826 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1827 return nfserr_inval
;
1829 switch (exid
->spa_how
) {
1831 if (!svc_rqst_integrity_protected(rqstp
))
1832 return nfserr_inval
;
1835 default: /* checked by xdr code */
1838 return nfserr_encr_alg_unsupp
;
1841 /* Cases below refer to rfc 5661 section 18.35.4: */
1843 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1845 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1846 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1849 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1850 status
= nfserr_inval
;
1853 if (!mach_creds_match(conf
, rqstp
)) {
1854 status
= nfserr_wrong_cred
;
1857 if (!creds_match
) { /* case 9 */
1858 status
= nfserr_perm
;
1861 if (!verfs_match
) { /* case 8 */
1862 status
= nfserr_not_same
;
1866 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1870 if (!creds_match
) { /* case 3 */
1871 if (client_has_state(conf
)) {
1872 status
= nfserr_clid_inuse
;
1875 expire_client(conf
);
1878 if (verfs_match
) { /* case 2 */
1879 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1883 /* case 5, client reboot */
1887 if (update
) { /* case 7 */
1888 status
= nfserr_noent
;
1892 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1893 if (unconf
) /* case 4, possible retry or client restart */
1894 expire_client(unconf
);
1896 /* case 1 (normal case) */
1898 new = create_client(exid
->clname
, rqstp
, &verf
);
1900 status
= nfserr_jukebox
;
1903 new->cl_minorversion
= cstate
->minorversion
;
1904 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1907 add_to_unconfirmed(new);
1909 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1910 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1912 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1913 nfsd4_set_ex_flags(new, exid
);
1915 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1916 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1920 nfs4_unlock_state();
1925 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1927 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1930 /* The slot is in use, and no response has been sent. */
1932 if (seqid
== slot_seqid
)
1933 return nfserr_jukebox
;
1935 return nfserr_seq_misordered
;
1937 /* Note unsigned 32-bit arithmetic handles wraparound: */
1938 if (likely(seqid
== slot_seqid
+ 1))
1940 if (seqid
== slot_seqid
)
1941 return nfserr_replay_cache
;
1942 return nfserr_seq_misordered
;
1946 * Cache the create session result into the create session single DRC
1947 * slot cache by saving the xdr structure. sl_seqid has been set.
1948 * Do this for solo or embedded create session operations.
1951 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1952 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1954 slot
->sl_status
= nfserr
;
1955 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1959 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1960 struct nfsd4_clid_slot
*slot
)
1962 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1963 return slot
->sl_status
;
1966 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1967 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1968 1 + /* MIN tag is length with zero, only length */ \
1969 3 + /* version, opcount, opcode */ \
1970 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1971 /* seqid, slotID, slotID, cache */ \
1972 4 ) * sizeof(__be32))
1974 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1975 2 + /* verifier: AUTH_NULL, length 0 */\
1977 1 + /* MIN tag is length with zero, only length */ \
1978 3 + /* opcount, opcode, opstatus*/ \
1979 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1980 /* seqid, slotID, slotID, slotID, status */ \
1981 5 ) * sizeof(__be32))
1983 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1985 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1987 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1988 return nfserr_toosmall
;
1989 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1990 return nfserr_toosmall
;
1991 ca
->headerpadsz
= 0;
1992 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1993 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1994 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1995 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1996 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1997 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1999 * Note decreasing slot size below client's request may make it
2000 * difficult for client to function correctly, whereas
2001 * decreasing the number of slots will (just?) affect
2002 * performance. When short on memory we therefore prefer to
2003 * decrease number of slots instead of their size. Clients that
2004 * request larger slots than they need will get poor results:
2006 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
2008 return nfserr_jukebox
;
2013 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2014 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2015 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2016 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2018 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
2020 ca
->headerpadsz
= 0;
2023 * These RPC_MAX_HEADER macros are overkill, especially since we
2024 * don't even do gss on the backchannel yet. But this is still
2025 * less than 1k. Tighten up this estimate in the unlikely event
2026 * it turns out to be a problem for some client:
2028 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
2029 return nfserr_toosmall
;
2030 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
2031 return nfserr_toosmall
;
2032 ca
->maxresp_cached
= 0;
2034 return nfserr_toosmall
;
2039 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
2041 switch (cbs
->flavor
) {
2047 * GSS case: the spec doesn't allow us to return this
2048 * error. But it also doesn't allow us not to support
2050 * I'd rather this fail hard than return some error the
2051 * client might think it can already handle:
2053 return nfserr_encr_alg_unsupp
;
2058 nfsd4_create_session(struct svc_rqst
*rqstp
,
2059 struct nfsd4_compound_state
*cstate
,
2060 struct nfsd4_create_session
*cr_ses
)
2062 struct sockaddr
*sa
= svc_addr(rqstp
);
2063 struct nfs4_client
*conf
, *unconf
;
2064 struct nfsd4_session
*new;
2065 struct nfsd4_conn
*conn
;
2066 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2068 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2070 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2071 return nfserr_inval
;
2072 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2075 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2078 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2080 goto out_release_drc_mem
;
2081 status
= nfserr_jukebox
;
2082 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2084 goto out_release_drc_mem
;
2085 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2087 goto out_free_session
;
2090 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2091 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2092 WARN_ON_ONCE(conf
&& unconf
);
2095 status
= nfserr_wrong_cred
;
2096 if (!mach_creds_match(conf
, rqstp
))
2098 cs_slot
= &conf
->cl_cs_slot
;
2099 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2100 if (status
== nfserr_replay_cache
) {
2101 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2103 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
2104 status
= nfserr_seq_misordered
;
2107 } else if (unconf
) {
2108 struct nfs4_client
*old
;
2109 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2110 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2111 status
= nfserr_clid_inuse
;
2114 status
= nfserr_wrong_cred
;
2115 if (!mach_creds_match(unconf
, rqstp
))
2117 cs_slot
= &unconf
->cl_cs_slot
;
2118 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2120 /* an unconfirmed replay returns misordered */
2121 status
= nfserr_seq_misordered
;
2124 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2126 status
= mark_client_expired(old
);
2131 move_to_confirmed(unconf
);
2134 status
= nfserr_stale_clientid
;
2139 * We do not support RDMA or persistent sessions
2141 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2142 cr_ses
->flags
&= ~SESSION4_RDMA
;
2144 init_session(rqstp
, new, conf
, cr_ses
);
2145 nfsd4_init_conn(rqstp
, conn
, new);
2147 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2148 NFS4_MAX_SESSIONID_LEN
);
2149 cs_slot
->sl_seqid
++;
2150 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2152 /* cache solo and embedded create sessions under the state lock */
2153 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2154 nfs4_unlock_state();
2157 nfs4_unlock_state();
2160 __free_session(new);
2161 out_release_drc_mem
:
2162 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2166 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2169 case NFS4_CDFC4_FORE
:
2170 case NFS4_CDFC4_BACK
:
2172 case NFS4_CDFC4_FORE_OR_BOTH
:
2173 case NFS4_CDFC4_BACK_OR_BOTH
:
2174 *dir
= NFS4_CDFC4_BOTH
;
2177 return nfserr_inval
;
2180 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2182 struct nfsd4_session
*session
= cstate
->session
;
2183 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2186 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2189 spin_lock(&nn
->client_lock
);
2190 session
->se_cb_prog
= bc
->bc_cb_program
;
2191 session
->se_cb_sec
= bc
->bc_cb_sec
;
2192 spin_unlock(&nn
->client_lock
);
2194 nfsd4_probe_callback(session
->se_client
);
2199 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2200 struct nfsd4_compound_state
*cstate
,
2201 struct nfsd4_bind_conn_to_session
*bcts
)
2204 struct nfsd4_conn
*conn
;
2205 struct nfsd4_session
*session
;
2206 struct net
*net
= SVC_NET(rqstp
);
2207 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2209 if (!nfsd4_last_compound_op(rqstp
))
2210 return nfserr_not_only_op
;
2212 spin_lock(&nn
->client_lock
);
2213 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, net
, &status
);
2214 spin_unlock(&nn
->client_lock
);
2216 goto out_no_session
;
2217 status
= nfserr_wrong_cred
;
2218 if (!mach_creds_match(session
->se_client
, rqstp
))
2220 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2223 conn
= alloc_conn(rqstp
, bcts
->dir
);
2224 status
= nfserr_jukebox
;
2227 nfsd4_init_conn(rqstp
, conn
, session
);
2230 nfsd4_put_session(session
);
2232 nfs4_unlock_state();
2236 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2240 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2244 nfsd4_destroy_session(struct svc_rqst
*r
,
2245 struct nfsd4_compound_state
*cstate
,
2246 struct nfsd4_destroy_session
*sessionid
)
2248 struct nfsd4_session
*ses
;
2250 int ref_held_by_me
= 0;
2251 struct net
*net
= SVC_NET(r
);
2252 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2255 status
= nfserr_not_only_op
;
2256 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2257 if (!nfsd4_last_compound_op(r
))
2261 dump_sessionid(__func__
, &sessionid
->sessionid
);
2262 spin_lock(&nn
->client_lock
);
2263 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, net
, &status
);
2265 goto out_client_lock
;
2266 status
= nfserr_wrong_cred
;
2267 if (!mach_creds_match(ses
->se_client
, r
))
2268 goto out_put_session
;
2269 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2271 goto out_put_session
;
2272 unhash_session(ses
);
2273 spin_unlock(&nn
->client_lock
);
2275 nfsd4_probe_callback_sync(ses
->se_client
);
2277 spin_lock(&nn
->client_lock
);
2280 nfsd4_put_session_locked(ses
);
2282 spin_unlock(&nn
->client_lock
);
2284 nfs4_unlock_state();
2288 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2290 struct nfsd4_conn
*c
;
2292 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2293 if (c
->cn_xprt
== xpt
) {
2300 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2302 struct nfs4_client
*clp
= ses
->se_client
;
2303 struct nfsd4_conn
*c
;
2304 __be32 status
= nfs_ok
;
2307 spin_lock(&clp
->cl_lock
);
2308 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2311 status
= nfserr_conn_not_bound_to_session
;
2312 if (clp
->cl_mach_cred
)
2314 __nfsd4_hash_conn(new, ses
);
2315 spin_unlock(&clp
->cl_lock
);
2316 ret
= nfsd4_register_conn(new);
2318 /* oops; xprt is already down: */
2319 nfsd4_conn_lost(&new->cn_xpt_user
);
2322 spin_unlock(&clp
->cl_lock
);
2327 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2329 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2331 return args
->opcnt
> session
->se_fchannel
.maxops
;
2334 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2335 struct nfsd4_session
*session
)
2337 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2339 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2343 nfsd4_sequence(struct svc_rqst
*rqstp
,
2344 struct nfsd4_compound_state
*cstate
,
2345 struct nfsd4_sequence
*seq
)
2347 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2348 struct xdr_stream
*xdr
= &resp
->xdr
;
2349 struct nfsd4_session
*session
;
2350 struct nfs4_client
*clp
;
2351 struct nfsd4_slot
*slot
;
2352 struct nfsd4_conn
*conn
;
2355 struct net
*net
= SVC_NET(rqstp
);
2356 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2358 if (resp
->opcnt
!= 1)
2359 return nfserr_sequence_pos
;
2362 * Will be either used or freed by nfsd4_sequence_check_conn
2365 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2367 return nfserr_jukebox
;
2369 spin_lock(&nn
->client_lock
);
2370 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, net
, &status
);
2372 goto out_no_session
;
2373 clp
= session
->se_client
;
2375 status
= nfserr_too_many_ops
;
2376 if (nfsd4_session_too_many_ops(rqstp
, session
))
2377 goto out_put_session
;
2379 status
= nfserr_req_too_big
;
2380 if (nfsd4_request_too_big(rqstp
, session
))
2381 goto out_put_session
;
2383 status
= nfserr_badslot
;
2384 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2385 goto out_put_session
;
2387 slot
= session
->se_slots
[seq
->slotid
];
2388 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2390 /* We do not negotiate the number of slots yet, so set the
2391 * maxslots to the session maxreqs which is used to encode
2392 * sr_highest_slotid and the sr_target_slot id to maxslots */
2393 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2395 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2396 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2397 if (status
== nfserr_replay_cache
) {
2398 status
= nfserr_seq_misordered
;
2399 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2400 goto out_put_session
;
2401 cstate
->slot
= slot
;
2402 cstate
->session
= session
;
2404 /* Return the cached reply status and set cstate->status
2405 * for nfsd4_proc_compound processing */
2406 status
= nfsd4_replay_cache_entry(resp
, seq
);
2407 cstate
->status
= nfserr_replay_cache
;
2411 goto out_put_session
;
2413 status
= nfsd4_sequence_check_conn(conn
, session
);
2416 goto out_put_session
;
2418 buflen
= (seq
->cachethis
) ?
2419 session
->se_fchannel
.maxresp_cached
:
2420 session
->se_fchannel
.maxresp_sz
;
2421 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2423 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2424 goto out_put_session
;
2425 svc_reserve(rqstp
, buflen
);
2428 /* Success! bump slot seqid */
2429 slot
->sl_seqid
= seq
->seqid
;
2430 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2432 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2434 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2436 cstate
->slot
= slot
;
2437 cstate
->session
= session
;
2441 switch (clp
->cl_cb_state
) {
2443 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2445 case NFSD4_CB_FAULT
:
2446 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2449 seq
->status_flags
= 0;
2451 if (!list_empty(&clp
->cl_revoked
))
2452 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2456 spin_unlock(&nn
->client_lock
);
2459 nfsd4_put_session_locked(session
);
2460 goto out_no_session
;
2464 nfsd4_sequence_done(struct nfsd4_compoundres
*resp
)
2466 struct nfsd4_compound_state
*cs
= &resp
->cstate
;
2468 if (nfsd4_has_session(cs
)) {
2469 if (cs
->status
!= nfserr_replay_cache
) {
2470 nfsd4_store_cache_entry(resp
);
2471 cs
->slot
->sl_flags
&= ~NFSD4_SLOT_INUSE
;
2473 /* Drop session reference that was taken in nfsd4_sequence() */
2474 nfsd4_put_session(cs
->session
);
2476 put_client_renew(cs
->clp
);
2480 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2482 struct nfs4_client
*conf
, *unconf
, *clp
;
2484 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2487 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2488 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2489 WARN_ON_ONCE(conf
&& unconf
);
2494 if (client_has_state(conf
)) {
2495 status
= nfserr_clientid_busy
;
2501 status
= nfserr_stale_clientid
;
2504 if (!mach_creds_match(clp
, rqstp
)) {
2505 status
= nfserr_wrong_cred
;
2510 nfs4_unlock_state();
2515 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2519 if (rc
->rca_one_fs
) {
2520 if (!cstate
->current_fh
.fh_dentry
)
2521 return nfserr_nofilehandle
;
2523 * We don't take advantage of the rca_one_fs case.
2524 * That's OK, it's optional, we can safely ignore it.
2530 status
= nfserr_complete_already
;
2531 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2532 &cstate
->session
->se_client
->cl_flags
))
2535 status
= nfserr_stale_clientid
;
2536 if (is_client_expired(cstate
->session
->se_client
))
2538 * The following error isn't really legal.
2539 * But we only get here if the client just explicitly
2540 * destroyed the client. Surely it no longer cares what
2541 * error it gets back on an operation for the dead
2547 nfsd4_client_record_create(cstate
->session
->se_client
);
2549 nfs4_unlock_state();
2554 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2555 struct nfsd4_setclientid
*setclid
)
2557 struct xdr_netobj clname
= setclid
->se_name
;
2558 nfs4_verifier clverifier
= setclid
->se_verf
;
2559 struct nfs4_client
*conf
, *unconf
, *new;
2561 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2563 /* Cases below refer to rfc 3530 section 14.2.33: */
2565 conf
= find_confirmed_client_by_name(&clname
, nn
);
2568 status
= nfserr_clid_inuse
;
2569 if (clp_used_exchangeid(conf
))
2571 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2572 char addr_str
[INET6_ADDRSTRLEN
];
2573 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2575 dprintk("NFSD: setclientid: string in use by client "
2576 "at %s\n", addr_str
);
2580 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2582 expire_client(unconf
);
2583 status
= nfserr_jukebox
;
2584 new = create_client(clname
, rqstp
, &clverifier
);
2587 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2588 /* case 1: probable callback update */
2589 copy_clid(new, conf
);
2590 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2592 new->cl_minorversion
= 0;
2593 gen_callback(new, setclid
, rqstp
);
2594 add_to_unconfirmed(new);
2595 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2596 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2597 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2600 nfs4_unlock_state();
2606 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2607 struct nfsd4_compound_state
*cstate
,
2608 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2610 struct nfs4_client
*conf
, *unconf
;
2611 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2612 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2614 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2616 if (STALE_CLIENTID(clid
, nn
))
2617 return nfserr_stale_clientid
;
2620 conf
= find_confirmed_client(clid
, false, nn
);
2621 unconf
= find_unconfirmed_client(clid
, false, nn
);
2623 * We try hard to give out unique clientid's, so if we get an
2624 * attempt to confirm the same clientid with a different cred,
2625 * there's a bug somewhere. Let's charitably assume it's our
2628 status
= nfserr_serverfault
;
2629 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2631 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2633 /* cases below refer to rfc 3530 section 14.2.34: */
2634 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2635 if (conf
&& !unconf
) /* case 2: probable retransmit */
2637 else /* case 4: client hasn't noticed we rebooted yet? */
2638 status
= nfserr_stale_clientid
;
2642 if (conf
) { /* case 1: callback update */
2643 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2644 nfsd4_probe_callback(conf
);
2645 expire_client(unconf
);
2646 } else { /* case 3: normal case; new or rebooted client */
2647 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2649 status
= mark_client_expired(conf
);
2652 expire_client(conf
);
2654 move_to_confirmed(unconf
);
2655 nfsd4_probe_callback(unconf
);
2658 nfs4_unlock_state();
2662 static struct nfs4_file
*nfsd4_alloc_file(void)
2664 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2667 /* OPEN Share state helper functions */
2668 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2670 unsigned int hashval
= file_hashval(ino
);
2672 lockdep_assert_held(&state_lock
);
2674 atomic_set(&fp
->fi_ref
, 1);
2675 INIT_LIST_HEAD(&fp
->fi_stateids
);
2676 INIT_LIST_HEAD(&fp
->fi_delegations
);
2679 fp
->fi_had_conflict
= false;
2680 fp
->fi_lease
= NULL
;
2681 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2682 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2683 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2687 nfsd4_free_slabs(void)
2689 kmem_cache_destroy(openowner_slab
);
2690 kmem_cache_destroy(lockowner_slab
);
2691 kmem_cache_destroy(file_slab
);
2692 kmem_cache_destroy(stateid_slab
);
2693 kmem_cache_destroy(deleg_slab
);
2697 nfsd4_init_slabs(void)
2699 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2700 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2701 if (openowner_slab
== NULL
)
2703 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2704 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2705 if (lockowner_slab
== NULL
)
2706 goto out_free_openowner_slab
;
2707 file_slab
= kmem_cache_create("nfsd4_files",
2708 sizeof(struct nfs4_file
), 0, 0, NULL
);
2709 if (file_slab
== NULL
)
2710 goto out_free_lockowner_slab
;
2711 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2712 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2713 if (stateid_slab
== NULL
)
2714 goto out_free_file_slab
;
2715 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2716 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2717 if (deleg_slab
== NULL
)
2718 goto out_free_stateid_slab
;
2721 out_free_stateid_slab
:
2722 kmem_cache_destroy(stateid_slab
);
2724 kmem_cache_destroy(file_slab
);
2725 out_free_lockowner_slab
:
2726 kmem_cache_destroy(lockowner_slab
);
2727 out_free_openowner_slab
:
2728 kmem_cache_destroy(openowner_slab
);
2730 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2734 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2736 rp
->rp_status
= nfserr_serverfault
;
2738 rp
->rp_buf
= rp
->rp_ibuf
;
2741 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2743 struct nfs4_stateowner
*sop
;
2745 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2749 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2750 if (!sop
->so_owner
.data
) {
2751 kmem_cache_free(slab
, sop
);
2754 sop
->so_owner
.len
= owner
->len
;
2756 INIT_LIST_HEAD(&sop
->so_stateids
);
2757 sop
->so_client
= clp
;
2758 init_nfs4_replay(&sop
->so_replay
);
2762 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2764 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2766 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2767 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2770 static struct nfs4_openowner
*
2771 alloc_init_open_stateowner(unsigned int strhashval
, struct nfsd4_open
*open
,
2772 struct nfsd4_compound_state
*cstate
)
2774 struct nfs4_client
*clp
= cstate
->clp
;
2775 struct nfs4_openowner
*oo
;
2777 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2780 oo
->oo_owner
.so_is_open_owner
= 1;
2781 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2782 oo
->oo_flags
= NFS4_OO_NEW
;
2783 if (nfsd4_has_session(cstate
))
2784 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
2786 oo
->oo_last_closed_stid
= NULL
;
2787 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2788 hash_openowner(oo
, clp
, strhashval
);
2792 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2793 struct nfs4_openowner
*oo
= open
->op_openowner
;
2795 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2796 INIT_LIST_HEAD(&stp
->st_locks
);
2797 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2798 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2799 stp
->st_stateowner
= &oo
->oo_owner
;
2802 stp
->st_access_bmap
= 0;
2803 stp
->st_deny_bmap
= 0;
2804 set_access(open
->op_share_access
, stp
);
2805 set_deny(open
->op_share_deny
, stp
);
2806 stp
->st_openstp
= NULL
;
2810 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2812 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2814 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2816 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2817 oo
->oo_time
= get_seconds();
2821 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2824 return (sop
->so_owner
.len
== owner
->len
) &&
2825 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2826 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2829 static struct nfs4_openowner
*
2830 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2831 bool sessions
, struct nfsd_net
*nn
)
2833 struct nfs4_stateowner
*so
;
2834 struct nfs4_openowner
*oo
;
2835 struct nfs4_client
*clp
;
2837 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2838 if (!so
->so_is_open_owner
)
2840 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2842 clp
= oo
->oo_owner
.so_client
;
2843 if ((bool)clp
->cl_minorversion
!= sessions
)
2845 renew_client(oo
->oo_owner
.so_client
);
2852 /* search file_hashtbl[] for file */
2853 static struct nfs4_file
*
2854 find_file_locked(struct inode
*ino
)
2856 unsigned int hashval
= file_hashval(ino
);
2857 struct nfs4_file
*fp
;
2859 lockdep_assert_held(&state_lock
);
2861 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2862 if (fp
->fi_inode
== ino
) {
2870 static struct nfs4_file
*
2871 find_file(struct inode
*ino
)
2873 struct nfs4_file
*fp
;
2875 spin_lock(&state_lock
);
2876 fp
= find_file_locked(ino
);
2877 spin_unlock(&state_lock
);
2881 static struct nfs4_file
*
2882 find_or_add_file(struct inode
*ino
, struct nfs4_file
*new)
2884 struct nfs4_file
*fp
;
2886 spin_lock(&state_lock
);
2887 fp
= find_file_locked(ino
);
2889 nfsd4_init_file(new, ino
);
2892 spin_unlock(&state_lock
);
2898 * Called to check deny when READ with all zero stateid or
2899 * WRITE with all zero or all one stateid
2902 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2904 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2905 struct nfs4_file
*fp
;
2906 struct nfs4_ol_stateid
*stp
;
2909 fp
= find_file(ino
);
2912 ret
= nfserr_locked
;
2913 /* Search for conflicting share reservations */
2914 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2915 if (test_deny(deny_type
, stp
) ||
2916 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2925 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2927 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2928 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2930 lockdep_assert_held(&state_lock
);
2931 /* We're assuming the state code never drops its reference
2932 * without first removing the lease. Since we're in this lease
2933 * callback (and since the lease code is serialized by the kernel
2934 * lock) we know the server hasn't removed the lease yet, we know
2935 * it's safe to take a reference: */
2936 atomic_inc(&dp
->dl_count
);
2938 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2940 /* Only place dl_time is set; protected by i_lock: */
2941 dp
->dl_time
= get_seconds();
2943 block_delegations(&dp
->dl_fh
);
2945 nfsd4_cb_recall(dp
);
2948 /* Called from break_lease() with i_lock held. */
2949 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2951 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2952 struct nfs4_delegation
*dp
;
2955 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2958 if (fp
->fi_had_conflict
) {
2959 WARN(1, "duplicate break on %p\n", fp
);
2963 * We don't want the locks code to timeout the lease for us;
2964 * we'll remove it ourself if a delegation isn't returned
2967 fl
->fl_break_time
= 0;
2969 spin_lock(&state_lock
);
2970 fp
->fi_had_conflict
= true;
2971 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2972 nfsd_break_one_deleg(dp
);
2973 spin_unlock(&state_lock
);
2977 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2980 return lease_modify(onlist
, arg
);
2985 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2986 .lm_break
= nfsd_break_deleg_cb
,
2987 .lm_change
= nfsd_change_deleg_cb
,
2990 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2992 if (nfsd4_has_session(cstate
))
2994 if (seqid
== so
->so_seqid
- 1)
2995 return nfserr_replay_me
;
2996 if (seqid
== so
->so_seqid
)
2998 return nfserr_bad_seqid
;
3001 static __be32
lookup_clientid(clientid_t
*clid
,
3002 struct nfsd4_compound_state
*cstate
,
3003 struct nfsd_net
*nn
)
3005 struct nfs4_client
*found
;
3008 found
= cstate
->clp
;
3009 if (!same_clid(&found
->cl_clientid
, clid
))
3010 return nfserr_stale_clientid
;
3014 if (STALE_CLIENTID(clid
, nn
))
3015 return nfserr_stale_clientid
;
3018 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3019 * cached already then we know this is for is for v4.0 and "sessions"
3022 WARN_ON_ONCE(cstate
->session
);
3023 found
= find_confirmed_client(clid
, false, nn
);
3025 return nfserr_expired
;
3027 /* Cache the nfs4_client in cstate! */
3028 cstate
->clp
= found
;
3029 atomic_inc(&found
->cl_refcount
);
3034 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
3035 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
3037 clientid_t
*clientid
= &open
->op_clientid
;
3038 struct nfs4_client
*clp
= NULL
;
3039 unsigned int strhashval
;
3040 struct nfs4_openowner
*oo
= NULL
;
3043 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
3044 return nfserr_stale_clientid
;
3046 * In case we need it later, after we've already created the
3047 * file and don't want to risk a further failure:
3049 open
->op_file
= nfsd4_alloc_file();
3050 if (open
->op_file
== NULL
)
3051 return nfserr_jukebox
;
3053 status
= lookup_clientid(clientid
, cstate
, nn
);
3058 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
3059 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
3060 open
->op_openowner
= oo
;
3064 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
3065 /* Replace unconfirmed owners without checking for replay. */
3066 release_openowner(oo
);
3067 open
->op_openowner
= NULL
;
3070 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
3075 oo
= alloc_init_open_stateowner(strhashval
, open
, cstate
);
3077 return nfserr_jukebox
;
3078 open
->op_openowner
= oo
;
3080 open
->op_stp
= nfs4_alloc_stateid(clp
);
3082 return nfserr_jukebox
;
3086 static inline __be32
3087 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
3089 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
3090 return nfserr_openmode
;
3095 static int share_access_to_flags(u32 share_access
)
3097 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3100 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3102 struct nfs4_stid
*ret
;
3104 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3107 return delegstateid(ret
);
3110 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3112 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3113 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3117 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3118 struct nfs4_delegation
**dp
)
3121 __be32 status
= nfserr_bad_stateid
;
3123 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3126 flags
= share_access_to_flags(open
->op_share_access
);
3127 status
= nfs4_check_delegmode(*dp
, flags
);
3131 if (!nfsd4_is_deleg_cur(open
))
3135 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3140 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
3142 struct nfs4_ol_stateid
*local
;
3143 struct nfs4_openowner
*oo
= open
->op_openowner
;
3145 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3146 /* ignore lock owners */
3147 if (local
->st_stateowner
->so_is_open_owner
== 0)
3149 /* remember if we have seen this open owner */
3150 if (local
->st_stateowner
== &oo
->oo_owner
)
3152 /* check for conflicting share reservations */
3153 if (!test_share(local
, open
))
3154 return nfserr_share_denied
;
3159 static inline int nfs4_access_to_access(u32 nfs4_access
)
3163 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3164 flags
|= NFSD_MAY_READ
;
3165 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3166 flags
|= NFSD_MAY_WRITE
;
3170 static inline __be32
3171 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3172 struct nfsd4_open
*open
)
3174 struct iattr iattr
= {
3175 .ia_valid
= ATTR_SIZE
,
3178 if (!open
->op_truncate
)
3180 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3181 return nfserr_inval
;
3182 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3185 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3186 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
3189 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3190 int access
= nfs4_access_to_access(open
->op_share_access
);
3192 if (!fp
->fi_fds
[oflag
]) {
3193 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
3194 &fp
->fi_fds
[oflag
]);
3198 nfs4_file_get_access(fp
, oflag
);
3200 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3202 goto out_put_access
;
3207 nfs4_file_put_access(fp
, oflag
);
3213 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
)
3215 u32 op_share_access
= open
->op_share_access
;
3218 if (!test_access(op_share_access
, stp
))
3219 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
3221 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3226 /* remember the open */
3227 set_access(op_share_access
, stp
);
3228 set_deny(open
->op_share_deny
, stp
);
3234 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3236 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3239 /* Should we give out recallable state?: */
3240 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3242 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3245 * In the sessions case, since we don't have to establish a
3246 * separate connection for callbacks, we assume it's OK
3247 * until we hear otherwise:
3249 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3252 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3254 struct file_lock
*fl
;
3256 fl
= locks_alloc_lock();
3259 locks_init_lock(fl
);
3260 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3261 fl
->fl_flags
= FL_DELEG
;
3262 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3263 fl
->fl_end
= OFFSET_MAX
;
3264 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3265 fl
->fl_pid
= current
->tgid
;
3269 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3271 struct nfs4_file
*fp
= dp
->dl_file
;
3272 struct file_lock
*fl
;
3275 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3278 fl
->fl_file
= find_readable_file(fp
);
3279 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3283 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3284 atomic_set(&fp
->fi_delegees
, 1);
3285 spin_lock(&state_lock
);
3286 hash_delegation_locked(dp
, fp
);
3287 spin_unlock(&state_lock
);
3290 locks_free_lock(fl
);
3294 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
3296 if (fp
->fi_had_conflict
)
3301 return nfs4_setlease(dp
);
3302 spin_lock(&state_lock
);
3303 atomic_inc(&fp
->fi_delegees
);
3304 if (fp
->fi_had_conflict
) {
3305 spin_unlock(&state_lock
);
3308 hash_delegation_locked(dp
, fp
);
3309 spin_unlock(&state_lock
);
3313 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3315 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3316 if (status
== -EAGAIN
)
3317 open
->op_why_no_deleg
= WND4_CONTENTION
;
3319 open
->op_why_no_deleg
= WND4_RESOURCE
;
3320 switch (open
->op_deleg_want
) {
3321 case NFS4_SHARE_WANT_READ_DELEG
:
3322 case NFS4_SHARE_WANT_WRITE_DELEG
:
3323 case NFS4_SHARE_WANT_ANY_DELEG
:
3325 case NFS4_SHARE_WANT_CANCEL
:
3326 open
->op_why_no_deleg
= WND4_CANCELLED
;
3328 case NFS4_SHARE_WANT_NO_DELEG
:
3335 * Attempt to hand out a delegation.
3337 * Note we don't support write delegations, and won't until the vfs has
3338 * proper support for them.
3341 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3342 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3344 struct nfs4_delegation
*dp
;
3345 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3349 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3350 open
->op_recall
= 0;
3351 switch (open
->op_claim_type
) {
3352 case NFS4_OPEN_CLAIM_PREVIOUS
:
3354 open
->op_recall
= 1;
3355 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3358 case NFS4_OPEN_CLAIM_NULL
:
3359 case NFS4_OPEN_CLAIM_FH
:
3361 * Let's not give out any delegations till everyone's
3362 * had the chance to reclaim theirs....
3364 if (locks_in_grace(net
))
3366 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3369 * Also, if the file was opened for write or
3370 * create, there's a good chance the client's
3371 * about to write to it, resulting in an
3372 * immediate recall (since we don't support
3373 * write delegations):
3375 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3377 if (open
->op_create
== NFS4_OPEN_CREATE
)
3383 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3386 status
= nfs4_set_delegation(dp
, stp
->st_file
);
3390 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3392 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3393 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3394 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3397 destroy_delegation(dp
);
3399 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3400 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3401 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3402 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3403 open
->op_recall
= 1;
3406 /* 4.1 client asking for a delegation? */
3407 if (open
->op_deleg_want
)
3408 nfsd4_open_deleg_none_ext(open
, status
);
3412 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3413 struct nfs4_delegation
*dp
)
3415 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3416 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3417 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3418 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3419 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3420 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3421 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3422 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3424 /* Otherwise the client must be confused wanting a delegation
3425 * it already has, therefore we don't return
3426 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3431 * called with nfs4_lock_state() held.
3434 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3436 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3437 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3438 struct nfs4_file
*fp
= NULL
;
3439 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3440 struct nfs4_ol_stateid
*stp
= NULL
;
3441 struct nfs4_delegation
*dp
= NULL
;
3445 * Lookup file; if found, lookup stateid and check open request,
3446 * and check for delegations in the process of being recalled.
3447 * If not found, create the nfs4_file struct
3449 fp
= find_or_add_file(ino
, open
->op_file
);
3450 if (fp
!= open
->op_file
) {
3451 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3453 status
= nfs4_check_deleg(cl
, open
, &dp
);
3457 open
->op_file
= NULL
;
3458 status
= nfserr_bad_stateid
;
3459 if (nfsd4_is_deleg_cur(open
))
3461 status
= nfserr_jukebox
;
3465 * OPEN the file, or upgrade an existing OPEN.
3466 * If truncate fails, the OPEN fails.
3469 /* Stateid was found, this is an OPEN upgrade */
3470 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3474 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3478 open
->op_stp
= NULL
;
3479 init_open_stateid(stp
, fp
, open
);
3481 update_stateid(&stp
->st_stid
.sc_stateid
);
3482 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3484 if (nfsd4_has_session(&resp
->cstate
)) {
3485 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3486 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3487 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3493 * Attempt to hand out a delegation. No error return, because the
3494 * OPEN succeeds even if we fail.
3496 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3500 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3501 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3503 /* 4.1 client trying to upgrade/downgrade delegation? */
3504 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3505 open
->op_deleg_want
)
3506 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3510 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3511 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3513 * To finish the open response, we just need to set the rflags.
3515 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3516 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3517 !nfsd4_has_session(&resp
->cstate
))
3518 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3523 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3525 if (open
->op_openowner
) {
3526 struct nfs4_openowner
*oo
= open
->op_openowner
;
3528 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3529 list_del_init(&oo
->oo_close_lru
);
3530 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3532 release_openowner(oo
);
3533 open
->op_openowner
= NULL
;
3535 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3539 nfsd4_free_file(open
->op_file
);
3541 free_generic_stateid(open
->op_stp
);
3545 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3548 struct nfs4_client
*clp
;
3550 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3553 dprintk("process_renew(%08x/%08x): starting\n",
3554 clid
->cl_boot
, clid
->cl_id
);
3555 status
= lookup_clientid(clid
, cstate
, nn
);
3559 status
= nfserr_cb_path_down
;
3560 if (!list_empty(&clp
->cl_delegations
)
3561 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3565 nfs4_unlock_state();
3570 nfsd4_end_grace(struct nfsd_net
*nn
)
3572 /* do nothing if grace period already ended */
3573 if (nn
->grace_ended
)
3576 dprintk("NFSD: end of grace period\n");
3577 nn
->grace_ended
= true;
3578 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3579 locks_end_grace(&nn
->nfsd4_manager
);
3581 * Now that every NFSv4 client has had the chance to recover and
3582 * to see the (possibly new, possibly shorter) lease time, we
3583 * can safely set the next grace time to the current lease time:
3585 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3589 nfs4_laundromat(struct nfsd_net
*nn
)
3591 struct nfs4_client
*clp
;
3592 struct nfs4_openowner
*oo
;
3593 struct nfs4_delegation
*dp
;
3594 struct list_head
*pos
, *next
, reaplist
;
3595 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3596 time_t t
, new_timeo
= nn
->nfsd4_lease
;
3600 dprintk("NFSD: laundromat service - starting\n");
3601 nfsd4_end_grace(nn
);
3602 INIT_LIST_HEAD(&reaplist
);
3603 spin_lock(&nn
->client_lock
);
3604 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3605 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3606 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3607 t
= clp
->cl_time
- cutoff
;
3608 new_timeo
= min(new_timeo
, t
);
3611 if (mark_client_expired_locked(clp
)) {
3612 dprintk("NFSD: client in use (clientid %08x)\n",
3613 clp
->cl_clientid
.cl_id
);
3616 list_move(&clp
->cl_lru
, &reaplist
);
3618 spin_unlock(&nn
->client_lock
);
3619 list_for_each_safe(pos
, next
, &reaplist
) {
3620 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3621 dprintk("NFSD: purging unused client (clientid %08x)\n",
3622 clp
->cl_clientid
.cl_id
);
3625 spin_lock(&state_lock
);
3626 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3627 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3628 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3630 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3631 t
= dp
->dl_time
- cutoff
;
3632 new_timeo
= min(new_timeo
, t
);
3635 list_move(&dp
->dl_recall_lru
, &reaplist
);
3637 spin_unlock(&state_lock
);
3638 list_for_each_safe(pos
, next
, &reaplist
) {
3639 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3640 revoke_delegation(dp
);
3642 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3643 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3644 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3645 t
= oo
->oo_time
- cutoff
;
3646 new_timeo
= min(new_timeo
, t
);
3649 release_openowner(oo
);
3651 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
3652 nfs4_unlock_state();
3656 static struct workqueue_struct
*laundry_wq
;
3657 static void laundromat_main(struct work_struct
*);
3660 laundromat_main(struct work_struct
*laundry
)
3663 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3665 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3668 t
= nfs4_laundromat(nn
);
3669 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3670 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3673 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3675 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3676 return nfserr_bad_stateid
;
3681 access_permit_read(struct nfs4_ol_stateid
*stp
)
3683 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3684 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3685 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3689 access_permit_write(struct nfs4_ol_stateid
*stp
)
3691 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3692 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3696 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3698 __be32 status
= nfserr_openmode
;
3700 /* For lock stateid's, we test the parent open, not the lock: */
3701 if (stp
->st_openstp
)
3702 stp
= stp
->st_openstp
;
3703 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3705 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3712 static inline __be32
3713 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3715 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3717 else if (locks_in_grace(net
)) {
3718 /* Answer in remaining cases depends on existence of
3719 * conflicting state; so we must wait out the grace period. */
3720 return nfserr_grace
;
3721 } else if (flags
& WR_STATE
)
3722 return nfs4_share_conflict(current_fh
,
3723 NFS4_SHARE_DENY_WRITE
);
3724 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3725 return nfs4_share_conflict(current_fh
,
3726 NFS4_SHARE_DENY_READ
);
3730 * Allow READ/WRITE during grace period on recovered state only for files
3731 * that are not able to provide mandatory locking.
3734 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3736 return locks_in_grace(net
) && mandatory_lock(inode
);
3739 /* Returns true iff a is later than b: */
3740 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3742 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3745 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3748 * When sessions are used the stateid generation number is ignored
3751 if (has_session
&& in
->si_generation
== 0)
3754 if (in
->si_generation
== ref
->si_generation
)
3757 /* If the client sends us a stateid from the future, it's buggy: */
3758 if (stateid_generation_after(in
, ref
))
3759 return nfserr_bad_stateid
;
3761 * However, we could see a stateid from the past, even from a
3762 * non-buggy client. For example, if the client sends a lock
3763 * while some IO is outstanding, the lock may bump si_generation
3764 * while the IO is still in flight. The client could avoid that
3765 * situation by waiting for responses on all the IO requests,
3766 * but better performance may result in retrying IO that
3767 * receives an old_stateid error if requests are rarely
3768 * reordered in flight:
3770 return nfserr_old_stateid
;
3773 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3775 struct nfs4_stid
*s
;
3776 struct nfs4_ol_stateid
*ols
;
3779 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3780 return nfserr_bad_stateid
;
3781 /* Client debugging aid. */
3782 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3783 char addr_str
[INET6_ADDRSTRLEN
];
3784 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3786 pr_warn_ratelimited("NFSD: client %s testing state ID "
3787 "with incorrect client ID\n", addr_str
);
3788 return nfserr_bad_stateid
;
3790 s
= find_stateid(cl
, stateid
);
3792 return nfserr_bad_stateid
;
3793 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3796 switch (s
->sc_type
) {
3797 case NFS4_DELEG_STID
:
3799 case NFS4_REVOKED_DELEG_STID
:
3800 return nfserr_deleg_revoked
;
3801 case NFS4_OPEN_STID
:
3802 case NFS4_LOCK_STID
:
3803 ols
= openlockstateid(s
);
3804 if (ols
->st_stateowner
->so_is_open_owner
3805 && !(openowner(ols
->st_stateowner
)->oo_flags
3806 & NFS4_OO_CONFIRMED
))
3807 return nfserr_bad_stateid
;
3810 printk("unknown stateid type %x\n", s
->sc_type
);
3811 case NFS4_CLOSED_STID
:
3812 return nfserr_bad_stateid
;
3817 nfsd4_lookup_stateid(struct nfsd4_compound_state
*cstate
,
3818 stateid_t
*stateid
, unsigned char typemask
,
3819 struct nfs4_stid
**s
, struct nfsd_net
*nn
)
3823 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3824 return nfserr_bad_stateid
;
3825 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, cstate
, nn
);
3826 if (status
== nfserr_stale_clientid
) {
3827 if (cstate
->session
)
3828 return nfserr_bad_stateid
;
3829 return nfserr_stale_stateid
;
3833 *s
= find_stateid_by_type(cstate
->clp
, stateid
, typemask
);
3835 return nfserr_bad_stateid
;
3840 * Checks for stateid operations
3843 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3844 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3846 struct nfs4_stid
*s
;
3847 struct nfs4_ol_stateid
*stp
= NULL
;
3848 struct nfs4_delegation
*dp
= NULL
;
3849 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3850 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3851 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3852 struct file
*file
= NULL
;
3858 if (grace_disallows_io(net
, ino
))
3859 return nfserr_grace
;
3861 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3862 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3866 status
= nfsd4_lookup_stateid(cstate
, stateid
,
3867 NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3871 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3874 switch (s
->sc_type
) {
3875 case NFS4_DELEG_STID
:
3876 dp
= delegstateid(s
);
3877 status
= nfs4_check_delegmode(dp
, flags
);
3881 file
= dp
->dl_file
->fi_deleg_file
;
3884 status
= nfserr_serverfault
;
3889 case NFS4_OPEN_STID
:
3890 case NFS4_LOCK_STID
:
3891 stp
= openlockstateid(s
);
3892 status
= nfs4_check_fh(current_fh
, stp
);
3895 if (stp
->st_stateowner
->so_is_open_owner
3896 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3898 status
= nfs4_check_openmode(stp
, flags
);
3902 if (flags
& RD_STATE
)
3903 file
= find_readable_file(stp
->st_file
);
3905 file
= find_writeable_file(stp
->st_file
);
3909 status
= nfserr_bad_stateid
;
3914 *filpp
= get_file(file
);
3916 nfs4_unlock_state();
3921 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3923 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
3925 if (check_for_locks(stp
->st_file
, lo
))
3926 return nfserr_locks_held
;
3927 release_lockowner_if_empty(lo
);
3932 * Test if the stateid is valid
3935 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3936 struct nfsd4_test_stateid
*test_stateid
)
3938 struct nfsd4_test_stateid_id
*stateid
;
3939 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3942 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3943 stateid
->ts_id_status
=
3944 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3945 nfs4_unlock_state();
3951 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3952 struct nfsd4_free_stateid
*free_stateid
)
3954 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3955 struct nfs4_stid
*s
;
3956 struct nfs4_delegation
*dp
;
3957 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3958 __be32 ret
= nfserr_bad_stateid
;
3961 s
= find_stateid(cl
, stateid
);
3964 switch (s
->sc_type
) {
3965 case NFS4_DELEG_STID
:
3966 ret
= nfserr_locks_held
;
3968 case NFS4_OPEN_STID
:
3969 case NFS4_LOCK_STID
:
3970 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3973 if (s
->sc_type
== NFS4_LOCK_STID
)
3974 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3976 ret
= nfserr_locks_held
;
3978 case NFS4_REVOKED_DELEG_STID
:
3979 dp
= delegstateid(s
);
3980 destroy_revoked_delegation(dp
);
3984 ret
= nfserr_bad_stateid
;
3987 nfs4_unlock_state();
3994 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3995 RD_STATE
: WR_STATE
;
3998 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
4000 struct svc_fh
*current_fh
= &cstate
->current_fh
;
4001 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
4004 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
4007 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
4008 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
4010 * "Closed" stateid's exist *only* to return
4011 * nfserr_replay_me from the previous step, and
4012 * revoked delegations are kept only for free_stateid.
4014 return nfserr_bad_stateid
;
4015 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4018 return nfs4_check_fh(current_fh
, stp
);
4022 * Checks for sequence id mutating operations.
4025 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4026 stateid_t
*stateid
, char typemask
,
4027 struct nfs4_ol_stateid
**stpp
,
4028 struct nfsd_net
*nn
)
4031 struct nfs4_stid
*s
;
4032 struct nfs4_ol_stateid
*stp
= NULL
;
4034 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
4035 seqid
, STATEID_VAL(stateid
));
4038 status
= nfsd4_lookup_stateid(cstate
, stateid
, typemask
, &s
, nn
);
4041 stp
= openlockstateid(s
);
4042 if (!nfsd4_has_session(cstate
))
4043 cstate
->replay_owner
= stp
->st_stateowner
;
4045 status
= nfs4_seqid_op_checks(cstate
, stateid
, seqid
, stp
);
4051 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
4052 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
4055 struct nfs4_openowner
*oo
;
4057 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
4058 NFS4_OPEN_STID
, stpp
, nn
);
4061 oo
= openowner((*stpp
)->st_stateowner
);
4062 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
4063 return nfserr_bad_stateid
;
4068 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4069 struct nfsd4_open_confirm
*oc
)
4072 struct nfs4_openowner
*oo
;
4073 struct nfs4_ol_stateid
*stp
;
4074 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4076 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4077 cstate
->current_fh
.fh_dentry
);
4079 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
4085 status
= nfs4_preprocess_seqid_op(cstate
,
4086 oc
->oc_seqid
, &oc
->oc_req_stateid
,
4087 NFS4_OPEN_STID
, &stp
, nn
);
4090 oo
= openowner(stp
->st_stateowner
);
4091 status
= nfserr_bad_stateid
;
4092 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
4094 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
4095 update_stateid(&stp
->st_stid
.sc_stateid
);
4096 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4097 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
4098 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4100 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
4103 nfsd4_bump_seqid(cstate
, status
);
4104 if (!cstate
->replay_owner
)
4105 nfs4_unlock_state();
4109 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
4111 if (!test_access(access
, stp
))
4113 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
4114 clear_access(access
, stp
);
4117 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
4119 switch (to_access
) {
4120 case NFS4_SHARE_ACCESS_READ
:
4121 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
4122 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4124 case NFS4_SHARE_ACCESS_WRITE
:
4125 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
4126 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4128 case NFS4_SHARE_ACCESS_BOTH
:
4136 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
4139 for (i
= 0; i
< 4; i
++) {
4140 if ((i
& deny
) != i
)
4146 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
4147 struct nfsd4_compound_state
*cstate
,
4148 struct nfsd4_open_downgrade
*od
)
4151 struct nfs4_ol_stateid
*stp
;
4152 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4154 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4155 cstate
->current_fh
.fh_dentry
);
4157 /* We don't yet support WANT bits: */
4158 if (od
->od_deleg_want
)
4159 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
4163 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
4164 &od
->od_stateid
, &stp
, nn
);
4167 status
= nfserr_inval
;
4168 if (!test_access(od
->od_share_access
, stp
)) {
4169 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
4170 stp
->st_access_bmap
, od
->od_share_access
);
4173 if (!test_deny(od
->od_share_deny
, stp
)) {
4174 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
4175 stp
->st_deny_bmap
, od
->od_share_deny
);
4178 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
4180 reset_union_bmap_deny(od
->od_share_deny
, stp
);
4182 update_stateid(&stp
->st_stid
.sc_stateid
);
4183 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4186 nfsd4_bump_seqid(cstate
, status
);
4187 if (!cstate
->replay_owner
)
4188 nfs4_unlock_state();
4192 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4194 struct nfs4_client
*clp
= s
->st_stid
.sc_client
;
4195 struct nfs4_openowner
*oo
= openowner(s
->st_stateowner
);
4197 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4198 unhash_open_stateid(s
);
4200 if (clp
->cl_minorversion
) {
4201 free_generic_stateid(s
);
4202 if (list_empty(&oo
->oo_owner
.so_stateids
))
4203 release_openowner(oo
);
4205 oo
->oo_last_closed_stid
= s
;
4207 * In the 4.0 case we need to keep the owners around a
4208 * little while to handle CLOSE replay.
4210 if (list_empty(&oo
->oo_owner
.so_stateids
))
4211 move_to_close_lru(oo
, clp
->net
);
4216 * nfs4_unlock_state() called after encode
4219 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4220 struct nfsd4_close
*close
)
4223 struct nfs4_ol_stateid
*stp
;
4224 struct net
*net
= SVC_NET(rqstp
);
4225 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4227 dprintk("NFSD: nfsd4_close on file %pd\n",
4228 cstate
->current_fh
.fh_dentry
);
4231 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4233 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4235 nfsd4_bump_seqid(cstate
, status
);
4238 update_stateid(&stp
->st_stid
.sc_stateid
);
4239 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4241 nfsd4_close_open_stateid(stp
);
4243 if (!cstate
->replay_owner
)
4244 nfs4_unlock_state();
4249 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4250 struct nfsd4_delegreturn
*dr
)
4252 struct nfs4_delegation
*dp
;
4253 stateid_t
*stateid
= &dr
->dr_stateid
;
4254 struct nfs4_stid
*s
;
4256 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4258 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4262 status
= nfsd4_lookup_stateid(cstate
, stateid
, NFS4_DELEG_STID
, &s
, nn
);
4265 dp
= delegstateid(s
);
4266 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4270 destroy_delegation(dp
);
4272 nfs4_unlock_state();
4278 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4281 end_offset(u64 start
, u64 len
)
4286 return end
>= start
? end
: NFS4_MAX_UINT64
;
4289 /* last octet in a range */
4291 last_byte_offset(u64 start
, u64 len
)
4297 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4301 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4302 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4303 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4304 * locking, this prevents us from being completely protocol-compliant. The
4305 * real solution to this problem is to start using unsigned file offsets in
4306 * the VFS, but this is a very deep change!
4309 nfs4_transform_lock_offset(struct file_lock
*lock
)
4311 if (lock
->fl_start
< 0)
4312 lock
->fl_start
= OFFSET_MAX
;
4313 if (lock
->fl_end
< 0)
4314 lock
->fl_end
= OFFSET_MAX
;
4317 /* Hack!: For now, we're defining this just so we can use a pointer to it
4318 * as a unique cookie to identify our (NFSv4's) posix locks. */
4319 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4323 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4325 struct nfs4_lockowner
*lo
;
4327 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4328 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4329 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4330 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4331 if (!deny
->ld_owner
.data
)
4332 /* We just don't care that much */
4334 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4335 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4338 deny
->ld_owner
.len
= 0;
4339 deny
->ld_owner
.data
= NULL
;
4340 deny
->ld_clientid
.cl_boot
= 0;
4341 deny
->ld_clientid
.cl_id
= 0;
4343 deny
->ld_start
= fl
->fl_start
;
4344 deny
->ld_length
= NFS4_MAX_UINT64
;
4345 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4346 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4347 deny
->ld_type
= NFS4_READ_LT
;
4348 if (fl
->fl_type
!= F_RDLCK
)
4349 deny
->ld_type
= NFS4_WRITE_LT
;
4352 static struct nfs4_lockowner
*
4353 find_lockowner_str(clientid_t
*clid
, struct xdr_netobj
*owner
,
4354 struct nfsd_net
*nn
)
4356 unsigned int strhashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4357 struct nfs4_stateowner
*so
;
4359 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[strhashval
], so_strhash
) {
4360 if (so
->so_is_open_owner
)
4362 if (!same_owner_str(so
, owner
, clid
))
4364 return lockowner(so
);
4370 * Alloc a lock owner structure.
4371 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4374 * strhashval = ownerstr_hashval
4376 static struct nfs4_lockowner
*
4377 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4378 struct nfs4_lockowner
*lo
;
4379 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4381 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4384 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4385 lo
->lo_owner
.so_is_open_owner
= 0;
4386 /* It is the openowner seqid that will be incremented in encode in the
4387 * case of new lockowners; so increment the lock seqid manually: */
4388 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4389 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4393 static struct nfs4_ol_stateid
*
4394 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4396 struct nfs4_ol_stateid
*stp
;
4397 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4399 stp
= nfs4_alloc_stateid(clp
);
4402 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4403 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4404 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4405 stp
->st_stateowner
= &lo
->lo_owner
;
4408 stp
->st_access_bmap
= 0;
4409 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4410 stp
->st_openstp
= open_stp
;
4411 list_add(&stp
->st_locks
, &open_stp
->st_locks
);
4415 static struct nfs4_ol_stateid
*
4416 find_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
)
4418 struct nfs4_ol_stateid
*lst
;
4420 list_for_each_entry(lst
, &lo
->lo_owner
.so_stateids
, st_perstateowner
) {
4421 if (lst
->st_file
== fp
)
4429 check_lock_length(u64 offset
, u64 length
)
4431 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4432 LOFF_OVERFLOW(offset
, length
)));
4435 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4437 struct nfs4_file
*fp
= lock_stp
->st_file
;
4438 int oflag
= nfs4_access_to_omode(access
);
4440 if (test_access(access
, lock_stp
))
4442 nfs4_file_get_access(fp
, oflag
);
4443 set_access(access
, lock_stp
);
4446 static __be32
lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
, struct nfs4_ol_stateid
*ost
, struct nfsd4_lock
*lock
, struct nfs4_ol_stateid
**lst
, bool *new)
4448 struct nfs4_file
*fi
= ost
->st_file
;
4449 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4450 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4451 struct nfs4_lockowner
*lo
;
4452 unsigned int strhashval
;
4453 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4455 lo
= find_lockowner_str(&cl
->cl_clientid
, &lock
->v
.new.owner
, nn
);
4457 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4458 &lock
->v
.new.owner
);
4459 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4461 return nfserr_jukebox
;
4463 /* with an existing lockowner, seqids must be the same */
4464 if (!cstate
->minorversion
&&
4465 lock
->lk_new_lock_seqid
!= lo
->lo_owner
.so_seqid
)
4466 return nfserr_bad_seqid
;
4469 *lst
= find_lock_stateid(lo
, fi
);
4471 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4473 release_lockowner_if_empty(lo
);
4474 return nfserr_jukebox
;
4485 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4486 struct nfsd4_lock
*lock
)
4488 struct nfs4_openowner
*open_sop
= NULL
;
4489 struct nfs4_lockowner
*lock_sop
= NULL
;
4490 struct nfs4_ol_stateid
*lock_stp
;
4491 struct file
*filp
= NULL
;
4492 struct file_lock
*file_lock
= NULL
;
4493 struct file_lock
*conflock
= NULL
;
4495 bool new_state
= false;
4498 struct net
*net
= SVC_NET(rqstp
);
4499 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4501 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4502 (long long) lock
->lk_offset
,
4503 (long long) lock
->lk_length
);
4505 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4506 return nfserr_inval
;
4508 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4509 S_IFREG
, NFSD_MAY_LOCK
))) {
4510 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4516 if (lock
->lk_is_new
) {
4517 struct nfs4_ol_stateid
*open_stp
= NULL
;
4519 if (nfsd4_has_session(cstate
))
4520 /* See rfc 5661 18.10.3: given clientid is ignored: */
4521 memcpy(&lock
->v
.new.clientid
,
4522 &cstate
->session
->se_client
->cl_clientid
,
4523 sizeof(clientid_t
));
4525 status
= nfserr_stale_clientid
;
4526 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4529 /* validate and update open stateid and open seqid */
4530 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4531 lock
->lk_new_open_seqid
,
4532 &lock
->lk_new_open_stateid
,
4536 open_sop
= openowner(open_stp
->st_stateowner
);
4537 status
= nfserr_bad_stateid
;
4538 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4539 &lock
->v
.new.clientid
))
4541 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4542 &lock_stp
, &new_state
);
4544 status
= nfs4_preprocess_seqid_op(cstate
,
4545 lock
->lk_old_lock_seqid
,
4546 &lock
->lk_old_lock_stateid
,
4547 NFS4_LOCK_STID
, &lock_stp
, nn
);
4550 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4552 lkflg
= setlkflg(lock
->lk_type
);
4553 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4557 status
= nfserr_grace
;
4558 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4560 status
= nfserr_no_grace
;
4561 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4564 file_lock
= locks_alloc_lock();
4566 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4567 status
= nfserr_jukebox
;
4571 locks_init_lock(file_lock
);
4572 switch (lock
->lk_type
) {
4575 filp
= find_readable_file(lock_stp
->st_file
);
4577 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4578 file_lock
->fl_type
= F_RDLCK
;
4581 case NFS4_WRITEW_LT
:
4582 filp
= find_writeable_file(lock_stp
->st_file
);
4584 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4585 file_lock
->fl_type
= F_WRLCK
;
4588 status
= nfserr_inval
;
4592 status
= nfserr_openmode
;
4595 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4596 file_lock
->fl_pid
= current
->tgid
;
4597 file_lock
->fl_file
= filp
;
4598 file_lock
->fl_flags
= FL_POSIX
;
4599 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4600 file_lock
->fl_start
= lock
->lk_offset
;
4601 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4602 nfs4_transform_lock_offset(file_lock
);
4604 conflock
= locks_alloc_lock();
4606 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4607 status
= nfserr_jukebox
;
4611 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4613 case 0: /* success! */
4614 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4615 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4619 case (EAGAIN
): /* conflock holds conflicting lock */
4620 status
= nfserr_denied
;
4621 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4622 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4625 status
= nfserr_deadlock
;
4628 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4629 status
= nfserrno(err
);
4633 if (status
&& new_state
)
4634 release_lock_stateid(lock_stp
);
4635 nfsd4_bump_seqid(cstate
, status
);
4636 if (!cstate
->replay_owner
)
4637 nfs4_unlock_state();
4639 locks_free_lock(file_lock
);
4641 locks_free_lock(conflock
);
4646 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4647 * so we do a temporary open here just to get an open file to pass to
4648 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4651 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4654 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4656 err
= nfserrno(vfs_test_lock(file
, lock
));
4666 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4667 struct nfsd4_lockt
*lockt
)
4669 struct file_lock
*file_lock
= NULL
;
4670 struct nfs4_lockowner
*lo
;
4672 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4674 if (locks_in_grace(SVC_NET(rqstp
)))
4675 return nfserr_grace
;
4677 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4678 return nfserr_inval
;
4682 if (!nfsd4_has_session(cstate
)) {
4683 status
= lookup_clientid(&lockt
->lt_clientid
, cstate
, nn
);
4688 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4691 file_lock
= locks_alloc_lock();
4693 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4694 status
= nfserr_jukebox
;
4697 locks_init_lock(file_lock
);
4698 switch (lockt
->lt_type
) {
4701 file_lock
->fl_type
= F_RDLCK
;
4704 case NFS4_WRITEW_LT
:
4705 file_lock
->fl_type
= F_WRLCK
;
4708 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4709 status
= nfserr_inval
;
4713 lo
= find_lockowner_str(&lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4715 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4716 file_lock
->fl_pid
= current
->tgid
;
4717 file_lock
->fl_flags
= FL_POSIX
;
4719 file_lock
->fl_start
= lockt
->lt_offset
;
4720 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4722 nfs4_transform_lock_offset(file_lock
);
4724 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4728 if (file_lock
->fl_type
!= F_UNLCK
) {
4729 status
= nfserr_denied
;
4730 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4733 nfs4_unlock_state();
4735 locks_free_lock(file_lock
);
4740 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4741 struct nfsd4_locku
*locku
)
4743 struct nfs4_ol_stateid
*stp
;
4744 struct file
*filp
= NULL
;
4745 struct file_lock
*file_lock
= NULL
;
4748 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4750 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4751 (long long) locku
->lu_offset
,
4752 (long long) locku
->lu_length
);
4754 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4755 return nfserr_inval
;
4759 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4760 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4764 filp
= find_any_file(stp
->st_file
);
4766 status
= nfserr_lock_range
;
4769 file_lock
= locks_alloc_lock();
4771 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4772 status
= nfserr_jukebox
;
4775 locks_init_lock(file_lock
);
4776 file_lock
->fl_type
= F_UNLCK
;
4777 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4778 file_lock
->fl_pid
= current
->tgid
;
4779 file_lock
->fl_file
= filp
;
4780 file_lock
->fl_flags
= FL_POSIX
;
4781 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4782 file_lock
->fl_start
= locku
->lu_offset
;
4784 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4786 nfs4_transform_lock_offset(file_lock
);
4788 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4790 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4793 update_stateid(&stp
->st_stid
.sc_stateid
);
4794 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4797 nfsd4_bump_seqid(cstate
, status
);
4798 if (!cstate
->replay_owner
)
4799 nfs4_unlock_state();
4801 locks_free_lock(file_lock
);
4805 status
= nfserrno(err
);
4811 * 1: locks held by lockowner
4812 * 0: no locks held by lockowner
4815 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4817 struct file_lock
**flpp
;
4818 struct inode
*inode
= filp
->fi_inode
;
4821 spin_lock(&inode
->i_lock
);
4822 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4823 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4829 spin_unlock(&inode
->i_lock
);
4834 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4835 struct nfsd4_compound_state
*cstate
,
4836 struct nfsd4_release_lockowner
*rlockowner
)
4838 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4839 struct nfs4_stateowner
*sop
= NULL
, *tmp
;
4840 struct nfs4_lockowner
*lo
;
4841 struct nfs4_ol_stateid
*stp
;
4842 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4843 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4845 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4847 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4848 clid
->cl_boot
, clid
->cl_id
);
4852 status
= lookup_clientid(clid
, cstate
, nn
);
4856 status
= nfserr_locks_held
;
4858 /* Find the matching lock stateowner */
4859 list_for_each_entry(tmp
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4860 if (tmp
->so_is_open_owner
)
4862 if (same_owner_str(tmp
, owner
, clid
)) {
4868 /* No matching owner found, maybe a replay? Just declare victory... */
4874 lo
= lockowner(sop
);
4875 /* see if there are still any locks associated with it */
4876 list_for_each_entry(stp
, &sop
->so_stateids
, st_perstateowner
) {
4877 if (check_for_locks(stp
->st_file
, lo
))
4882 release_lockowner(lo
);
4884 nfs4_unlock_state();
4888 static inline struct nfs4_client_reclaim
*
4891 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4895 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4897 struct nfs4_client_reclaim
*crp
;
4899 crp
= nfsd4_find_reclaim_client(name
, nn
);
4900 return (crp
&& crp
->cr_clp
);
4904 * failure => all reset bets are off, nfserr_no_grace...
4906 struct nfs4_client_reclaim
*
4907 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4909 unsigned int strhashval
;
4910 struct nfs4_client_reclaim
*crp
;
4912 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4913 crp
= alloc_reclaim();
4915 strhashval
= clientstr_hashval(name
);
4916 INIT_LIST_HEAD(&crp
->cr_strhash
);
4917 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4918 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4920 nn
->reclaim_str_hashtbl_size
++;
4926 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4928 list_del(&crp
->cr_strhash
);
4930 nn
->reclaim_str_hashtbl_size
--;
4934 nfs4_release_reclaim(struct nfsd_net
*nn
)
4936 struct nfs4_client_reclaim
*crp
= NULL
;
4939 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4940 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4941 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4942 struct nfs4_client_reclaim
, cr_strhash
);
4943 nfs4_remove_reclaim_record(crp
, nn
);
4946 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4950 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4951 struct nfs4_client_reclaim
*
4952 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4954 unsigned int strhashval
;
4955 struct nfs4_client_reclaim
*crp
= NULL
;
4957 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4959 strhashval
= clientstr_hashval(recdir
);
4960 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4961 if (same_name(crp
->cr_recdir
, recdir
)) {
4969 * Called from OPEN. Look for clientid in reclaim list.
4972 nfs4_check_open_reclaim(clientid_t
*clid
,
4973 struct nfsd4_compound_state
*cstate
,
4974 struct nfsd_net
*nn
)
4978 /* find clientid in conf_id_hashtbl */
4979 status
= lookup_clientid(clid
, cstate
, nn
);
4981 return nfserr_reclaim_bad
;
4983 if (nfsd4_client_record_check(cstate
->clp
))
4984 return nfserr_reclaim_bad
;
4989 #ifdef CONFIG_NFSD_FAULT_INJECTION
4991 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4993 if (mark_client_expired(clp
))
4999 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
5001 char buf
[INET6_ADDRSTRLEN
];
5002 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5003 printk(KERN_INFO
"NFS Client: %s\n", buf
);
5007 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
5010 char buf
[INET6_ADDRSTRLEN
];
5011 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
5012 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
5015 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
,
5016 void (*func
)(struct nfs4_ol_stateid
*))
5018 struct nfs4_openowner
*oop
;
5019 struct nfs4_ol_stateid
*stp
, *st_next
;
5020 struct nfs4_ol_stateid
*lst
, *lst_next
;
5023 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
5024 list_for_each_entry_safe(stp
, st_next
,
5025 &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
5026 list_for_each_entry_safe(lst
, lst_next
,
5027 &stp
->st_locks
, st_locks
) {
5039 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
5041 return nfsd_foreach_client_lock(clp
, max
, release_lock_stateid
);
5044 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
5046 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
5047 nfsd_print_count(clp
, count
, "locked files");
5051 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
5053 struct nfs4_openowner
*oop
, *next
;
5056 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
5066 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
5068 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
5071 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
5073 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
5074 nfsd_print_count(clp
, count
, "open files");
5078 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
5079 struct list_head
*victims
)
5081 struct nfs4_delegation
*dp
, *next
;
5084 lockdep_assert_held(&state_lock
);
5085 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
5087 list_move(&dp
->dl_recall_lru
, victims
);
5094 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
5096 struct nfs4_delegation
*dp
, *next
;
5100 spin_lock(&state_lock
);
5101 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
5102 spin_unlock(&state_lock
);
5104 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
5105 revoke_delegation(dp
);
5110 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
5112 struct nfs4_delegation
*dp
, *next
;
5116 spin_lock(&state_lock
);
5117 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
5118 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
5119 nfsd_break_one_deleg(dp
);
5120 spin_unlock(&state_lock
);
5125 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
5129 spin_lock(&state_lock
);
5130 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
5131 spin_unlock(&state_lock
);
5133 nfsd_print_count(clp
, count
, "delegations");
5137 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
5139 struct nfs4_client
*clp
, *next
;
5141 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
5143 if (!nfsd_netns_ready(nn
))
5146 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
5147 count
+= func(clp
, max
- count
);
5148 if ((max
!= 0) && (count
>= max
))
5155 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5157 struct nfs4_client
*clp
;
5158 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
5160 if (!nfsd_netns_ready(nn
))
5163 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5164 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5170 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5173 * Since the lifetime of a delegation isn't limited to that of an open, a
5174 * client may quite reasonably hang on to a delegation as long as it has
5175 * the inode cached. This becomes an obvious problem the first time a
5176 * client's inode cache approaches the size of the server's total memory.
5178 * For now we avoid this problem by imposing a hard limit on the number
5179 * of delegations, which varies according to the server's memory size.
5182 set_max_delegations(void)
5185 * Allow at most 4 delegations per megabyte of RAM. Quick
5186 * estimates suggest that in the worst case (where every delegation
5187 * is for a different inode), a delegation could take about 1.5K,
5188 * giving a worst case usage of about 6% of memory.
5190 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
5193 static int nfs4_state_create_net(struct net
*net
)
5195 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5198 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5199 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5200 if (!nn
->conf_id_hashtbl
)
5202 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5203 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5204 if (!nn
->unconf_id_hashtbl
)
5206 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
5207 OWNER_HASH_SIZE
, GFP_KERNEL
);
5208 if (!nn
->ownerstr_hashtbl
)
5210 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
5211 SESSION_HASH_SIZE
, GFP_KERNEL
);
5212 if (!nn
->sessionid_hashtbl
)
5215 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5216 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5217 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5219 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5220 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5221 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5222 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5223 nn
->conf_name_tree
= RB_ROOT
;
5224 nn
->unconf_name_tree
= RB_ROOT
;
5225 INIT_LIST_HEAD(&nn
->client_lru
);
5226 INIT_LIST_HEAD(&nn
->close_lru
);
5227 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5228 spin_lock_init(&nn
->client_lock
);
5230 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5236 kfree(nn
->ownerstr_hashtbl
);
5238 kfree(nn
->unconf_id_hashtbl
);
5240 kfree(nn
->conf_id_hashtbl
);
5246 nfs4_state_destroy_net(struct net
*net
)
5249 struct nfs4_client
*clp
= NULL
;
5250 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5252 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5253 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5254 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5255 destroy_client(clp
);
5259 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5260 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
5261 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5262 destroy_client(clp
);
5266 kfree(nn
->sessionid_hashtbl
);
5267 kfree(nn
->ownerstr_hashtbl
);
5268 kfree(nn
->unconf_id_hashtbl
);
5269 kfree(nn
->conf_id_hashtbl
);
5274 nfs4_state_start_net(struct net
*net
)
5276 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5279 ret
= nfs4_state_create_net(net
);
5282 nfsd4_client_tracking_init(net
);
5283 nn
->boot_time
= get_seconds();
5284 locks_start_grace(net
, &nn
->nfsd4_manager
);
5285 nn
->grace_ended
= false;
5286 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5287 nn
->nfsd4_grace
, net
);
5288 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5292 /* initialization to perform when the nfsd service is started: */
5295 nfs4_state_start(void)
5299 ret
= set_callback_cred();
5302 laundry_wq
= create_singlethread_workqueue("nfsd4");
5303 if (laundry_wq
== NULL
) {
5307 ret
= nfsd4_create_callback_queue();
5309 goto out_free_laundry
;
5311 set_max_delegations();
5316 destroy_workqueue(laundry_wq
);
5322 nfs4_state_shutdown_net(struct net
*net
)
5324 struct nfs4_delegation
*dp
= NULL
;
5325 struct list_head
*pos
, *next
, reaplist
;
5326 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5328 cancel_delayed_work_sync(&nn
->laundromat_work
);
5329 locks_end_grace(&nn
->nfsd4_manager
);
5332 INIT_LIST_HEAD(&reaplist
);
5333 spin_lock(&state_lock
);
5334 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5335 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5336 list_move(&dp
->dl_recall_lru
, &reaplist
);
5338 spin_unlock(&state_lock
);
5339 list_for_each_safe(pos
, next
, &reaplist
) {
5340 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5341 destroy_delegation(dp
);
5344 nfsd4_client_tracking_exit(net
);
5345 nfs4_state_destroy_net(net
);
5346 nfs4_unlock_state();
5350 nfs4_state_shutdown(void)
5352 destroy_workqueue(laundry_wq
);
5353 nfsd4_destroy_callback_queue();
5357 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5359 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5360 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5364 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5366 if (cstate
->minorversion
) {
5367 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5368 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5373 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5375 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5379 * functions to set current state id
5382 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5384 put_stateid(cstate
, &odp
->od_stateid
);
5388 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5390 put_stateid(cstate
, &open
->op_stateid
);
5394 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5396 put_stateid(cstate
, &close
->cl_stateid
);
5400 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5402 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5406 * functions to consume current state id
5410 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5412 get_stateid(cstate
, &odp
->od_stateid
);
5416 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5418 get_stateid(cstate
, &drp
->dr_stateid
);
5422 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5424 get_stateid(cstate
, &fsp
->fr_stateid
);
5428 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5430 get_stateid(cstate
, &setattr
->sa_stateid
);
5434 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5436 get_stateid(cstate
, &close
->cl_stateid
);
5440 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5442 get_stateid(cstate
, &locku
->lu_stateid
);
5446 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5448 get_stateid(cstate
, &read
->rd_stateid
);
5452 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5454 get_stateid(cstate
, &write
->wr_stateid
);