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 void nfsd4_put_session(struct nfsd4_session
*ses
)
108 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
112 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
114 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
115 return nfserr_jukebox
;
116 ses
->se_flags
|= NFS4_SESSION_DEAD
;
120 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
122 if (is_session_dead(ses
))
123 return nfserr_badsession
;
124 atomic_inc(&ses
->se_ref
);
129 nfs4_unlock_state(void)
131 mutex_unlock(&client_mutex
);
134 static bool is_client_expired(struct nfs4_client
*clp
)
136 return clp
->cl_time
== 0;
139 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
141 if (atomic_read(&clp
->cl_refcount
))
142 return nfserr_jukebox
;
147 static __be32
mark_client_expired(struct nfs4_client
*clp
)
149 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
152 spin_lock(&nn
->client_lock
);
153 ret
= mark_client_expired_locked(clp
);
154 spin_unlock(&nn
->client_lock
);
158 static __be32
get_client_locked(struct nfs4_client
*clp
)
160 if (is_client_expired(clp
))
161 return nfserr_expired
;
162 atomic_inc(&clp
->cl_refcount
);
166 /* must be called under the client_lock */
168 renew_client_locked(struct nfs4_client
*clp
)
170 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
172 if (is_client_expired(clp
)) {
174 printk("%s: client (clientid %08x/%08x) already expired\n",
176 clp
->cl_clientid
.cl_boot
,
177 clp
->cl_clientid
.cl_id
);
181 dprintk("renewing client (clientid %08x/%08x)\n",
182 clp
->cl_clientid
.cl_boot
,
183 clp
->cl_clientid
.cl_id
);
184 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
185 clp
->cl_time
= get_seconds();
189 renew_client(struct nfs4_client
*clp
)
191 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
193 spin_lock(&nn
->client_lock
);
194 renew_client_locked(clp
);
195 spin_unlock(&nn
->client_lock
);
198 static void put_client_renew_locked(struct nfs4_client
*clp
)
200 if (!atomic_dec_and_test(&clp
->cl_refcount
))
202 if (!is_client_expired(clp
))
203 renew_client_locked(clp
);
206 void put_client_renew(struct nfs4_client
*clp
)
208 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
210 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
212 if (!is_client_expired(clp
))
213 renew_client_locked(clp
);
214 spin_unlock(&nn
->client_lock
);
219 opaque_hashval(const void *ptr
, int nbytes
)
221 unsigned char *cptr
= (unsigned char *) ptr
;
231 static void nfsd4_free_file(struct nfs4_file
*f
)
233 kmem_cache_free(file_slab
, f
);
237 put_nfs4_file(struct nfs4_file
*fi
)
239 if (atomic_dec_and_lock(&fi
->fi_ref
, &state_lock
)) {
240 hlist_del(&fi
->fi_hash
);
241 spin_unlock(&state_lock
);
248 get_nfs4_file(struct nfs4_file
*fi
)
250 atomic_inc(&fi
->fi_ref
);
253 static int num_delegations
;
254 unsigned long max_delegations
;
257 * Open owner state (share locks)
260 /* hash tables for lock and open owners */
261 #define OWNER_HASH_BITS 8
262 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
263 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
265 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
269 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
271 return ret
& OWNER_HASH_MASK
;
274 /* hash table for nfs4_file */
275 #define FILE_HASH_BITS 8
276 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
278 static unsigned int file_hashval(struct inode
*ino
)
280 /* XXX: why are we hashing on inode pointer, anyway? */
281 return hash_ptr(ino
, FILE_HASH_BITS
);
284 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
286 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
288 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
289 atomic_inc(&fp
->fi_access
[oflag
]);
292 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
294 if (oflag
== O_RDWR
) {
295 __nfs4_file_get_access(fp
, O_RDONLY
);
296 __nfs4_file_get_access(fp
, O_WRONLY
);
298 __nfs4_file_get_access(fp
, oflag
);
301 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
303 if (fp
->fi_fds
[oflag
]) {
304 fput(fp
->fi_fds
[oflag
]);
305 fp
->fi_fds
[oflag
] = NULL
;
309 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
311 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
312 nfs4_file_put_fd(fp
, oflag
);
313 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
314 nfs4_file_put_fd(fp
, O_RDWR
);
318 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
320 if (oflag
== O_RDWR
) {
321 __nfs4_file_put_access(fp
, O_RDONLY
);
322 __nfs4_file_put_access(fp
, O_WRONLY
);
324 __nfs4_file_put_access(fp
, oflag
);
327 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
330 struct idr
*stateids
= &cl
->cl_stateids
;
331 struct nfs4_stid
*stid
;
334 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
338 new_id
= idr_alloc_cyclic(stateids
, stid
, 0, 0, GFP_KERNEL
);
341 stid
->sc_client
= cl
;
343 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
344 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
345 /* Will be incremented before return to client: */
346 stid
->sc_stateid
.si_generation
= 0;
349 * It shouldn't be a problem to reuse an opaque stateid value.
350 * I don't think it is for 4.1. But with 4.0 I worry that, for
351 * example, a stray write retransmission could be accepted by
352 * the server when it should have been rejected. Therefore,
353 * adopt a trick from the sctp code to attempt to maximize the
354 * amount of time until an id is reused, by ensuring they always
355 * "increase" (mod INT_MAX):
359 kmem_cache_free(slab
, stid
);
363 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
365 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
369 * When we recall a delegation, we should be careful not to hand it
370 * out again straight away.
371 * To ensure this we keep a pair of bloom filters ('new' and 'old')
372 * in which the filehandles of recalled delegations are "stored".
373 * If a filehandle appear in either filter, a delegation is blocked.
374 * When a delegation is recalled, the filehandle is stored in the "new"
376 * Every 30 seconds we swap the filters and clear the "new" one,
377 * unless both are empty of course.
379 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
380 * low 3 bytes as hash-table indices.
382 * 'state_lock', which is always held when block_delegations() is called,
383 * is used to manage concurrent access. Testing does not need the lock
384 * except when swapping the two filters.
386 static struct bloom_pair
{
387 int entries
, old_entries
;
389 int new; /* index into 'set' */
390 DECLARE_BITMAP(set
[2], 256);
391 } blocked_delegations
;
393 static int delegation_blocked(struct knfsd_fh
*fh
)
396 struct bloom_pair
*bd
= &blocked_delegations
;
398 if (bd
->entries
== 0)
400 if (seconds_since_boot() - bd
->swap_time
> 30) {
401 spin_lock(&state_lock
);
402 if (seconds_since_boot() - bd
->swap_time
> 30) {
403 bd
->entries
-= bd
->old_entries
;
404 bd
->old_entries
= bd
->entries
;
405 memset(bd
->set
[bd
->new], 0,
408 bd
->swap_time
= seconds_since_boot();
410 spin_unlock(&state_lock
);
412 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
413 if (test_bit(hash
&255, bd
->set
[0]) &&
414 test_bit((hash
>>8)&255, bd
->set
[0]) &&
415 test_bit((hash
>>16)&255, bd
->set
[0]))
418 if (test_bit(hash
&255, bd
->set
[1]) &&
419 test_bit((hash
>>8)&255, bd
->set
[1]) &&
420 test_bit((hash
>>16)&255, bd
->set
[1]))
426 static void block_delegations(struct knfsd_fh
*fh
)
429 struct bloom_pair
*bd
= &blocked_delegations
;
431 hash
= arch_fast_hash(&fh
->fh_base
, fh
->fh_size
, 0);
433 __set_bit(hash
&255, bd
->set
[bd
->new]);
434 __set_bit((hash
>>8)&255, bd
->set
[bd
->new]);
435 __set_bit((hash
>>16)&255, bd
->set
[bd
->new]);
436 if (bd
->entries
== 0)
437 bd
->swap_time
= seconds_since_boot();
441 static struct nfs4_delegation
*
442 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
)
444 struct nfs4_delegation
*dp
;
446 dprintk("NFSD alloc_init_deleg\n");
447 if (num_delegations
> max_delegations
)
449 if (delegation_blocked(¤t_fh
->fh_handle
))
451 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
455 * delegation seqid's are never incremented. The 4.1 special
456 * meaning of seqid 0 isn't meaningful, really, but let's avoid
457 * 0 anyway just for consistency and use 1:
459 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
461 INIT_LIST_HEAD(&dp
->dl_perfile
);
462 INIT_LIST_HEAD(&dp
->dl_perclnt
);
463 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
465 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
466 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
468 atomic_set(&dp
->dl_count
, 1);
469 nfsd4_init_callback(&dp
->dl_recall
);
473 static void remove_stid(struct nfs4_stid
*s
)
475 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
477 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
480 static void nfs4_free_stid(struct kmem_cache
*slab
, struct nfs4_stid
*s
)
482 kmem_cache_free(slab
, s
);
486 nfs4_put_delegation(struct nfs4_delegation
*dp
)
488 if (atomic_dec_and_test(&dp
->dl_count
)) {
489 nfs4_free_stid(deleg_slab
, &dp
->dl_stid
);
494 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
498 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
499 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
501 fput(fp
->fi_deleg_file
);
502 fp
->fi_deleg_file
= NULL
;
506 static void unhash_stid(struct nfs4_stid
*s
)
512 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
514 lockdep_assert_held(&state_lock
);
516 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
517 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
518 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
521 /* Called under the state lock. */
523 unhash_delegation(struct nfs4_delegation
*dp
)
525 spin_lock(&state_lock
);
526 list_del_init(&dp
->dl_perclnt
);
527 list_del_init(&dp
->dl_perfile
);
528 list_del_init(&dp
->dl_recall_lru
);
529 spin_unlock(&state_lock
);
531 nfs4_put_deleg_lease(dp
->dl_file
);
532 put_nfs4_file(dp
->dl_file
);
539 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
541 list_del_init(&dp
->dl_recall_lru
);
542 remove_stid(&dp
->dl_stid
);
543 nfs4_put_delegation(dp
);
546 static void destroy_delegation(struct nfs4_delegation
*dp
)
548 unhash_delegation(dp
);
549 remove_stid(&dp
->dl_stid
);
550 nfs4_put_delegation(dp
);
553 static void revoke_delegation(struct nfs4_delegation
*dp
)
555 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
557 if (clp
->cl_minorversion
== 0)
558 destroy_delegation(dp
);
560 unhash_delegation(dp
);
561 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
562 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
570 static unsigned int clientid_hashval(u32 id
)
572 return id
& CLIENT_HASH_MASK
;
575 static unsigned int clientstr_hashval(const char *name
)
577 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
581 * We store the NONE, READ, WRITE, and BOTH bits separately in the
582 * st_{access,deny}_bmap field of the stateid, in order to track not
583 * only what share bits are currently in force, but also what
584 * combinations of share bits previous opens have used. This allows us
585 * to enforce the recommendation of rfc 3530 14.2.19 that the server
586 * return an error if the client attempt to downgrade to a combination
587 * of share bits not explicable by closing some of its previous opens.
589 * XXX: This enforcement is actually incomplete, since we don't keep
590 * track of access/deny bit combinations; so, e.g., we allow:
592 * OPEN allow read, deny write
593 * OPEN allow both, deny none
594 * DOWNGRADE allow read, deny none
596 * which we should reject.
599 bmap_to_share_mode(unsigned long bmap
) {
601 unsigned int access
= 0;
603 for (i
= 1; i
< 4; i
++) {
604 if (test_bit(i
, &bmap
))
611 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
612 unsigned int access
, deny
;
614 access
= bmap_to_share_mode(stp
->st_access_bmap
);
615 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
616 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
621 /* set share access for a given stateid */
623 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
625 __set_bit(access
, &stp
->st_access_bmap
);
628 /* clear share access for a given stateid */
630 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
632 __clear_bit(access
, &stp
->st_access_bmap
);
635 /* test whether a given stateid has access */
637 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
639 return test_bit(access
, &stp
->st_access_bmap
);
642 /* set share deny for a given stateid */
644 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
646 __set_bit(access
, &stp
->st_deny_bmap
);
649 /* clear share deny for a given stateid */
651 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
653 __clear_bit(access
, &stp
->st_deny_bmap
);
656 /* test whether a given stateid is denying specific access */
658 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
660 return test_bit(access
, &stp
->st_deny_bmap
);
663 static int nfs4_access_to_omode(u32 access
)
665 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
666 case NFS4_SHARE_ACCESS_READ
:
668 case NFS4_SHARE_ACCESS_WRITE
:
670 case NFS4_SHARE_ACCESS_BOTH
:
677 /* release all access and file references for a given stateid */
679 release_all_access(struct nfs4_ol_stateid
*stp
)
683 for (i
= 1; i
< 4; i
++) {
684 if (test_access(i
, stp
))
685 nfs4_file_put_access(stp
->st_file
,
686 nfs4_access_to_omode(i
));
687 clear_access(i
, stp
);
691 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
693 list_del(&stp
->st_perfile
);
694 list_del(&stp
->st_perstateowner
);
697 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
699 release_all_access(stp
);
700 put_nfs4_file(stp
->st_file
);
704 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
706 remove_stid(&stp
->st_stid
);
707 nfs4_free_stid(stateid_slab
, &stp
->st_stid
);
710 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
714 unhash_generic_stateid(stp
);
715 unhash_stid(&stp
->st_stid
);
716 file
= find_any_file(stp
->st_file
);
718 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
719 close_generic_stateid(stp
);
720 free_generic_stateid(stp
);
723 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
725 struct nfs4_ol_stateid
*stp
;
727 list_del(&lo
->lo_owner
.so_strhash
);
728 list_del(&lo
->lo_perstateid
);
729 list_del(&lo
->lo_owner_ino_hash
);
730 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
731 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
732 struct nfs4_ol_stateid
, st_perstateowner
);
733 release_lock_stateid(stp
);
737 static void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
739 kfree(lo
->lo_owner
.so_owner
.data
);
740 kmem_cache_free(lockowner_slab
, lo
);
743 static void release_lockowner(struct nfs4_lockowner
*lo
)
745 unhash_lockowner(lo
);
746 nfs4_free_lockowner(lo
);
750 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
752 struct nfs4_lockowner
*lo
;
754 while (!list_empty(&open_stp
->st_lockowners
)) {
755 lo
= list_entry(open_stp
->st_lockowners
.next
,
756 struct nfs4_lockowner
, lo_perstateid
);
757 release_lockowner(lo
);
761 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
763 unhash_generic_stateid(stp
);
764 release_stateid_lockowners(stp
);
765 close_generic_stateid(stp
);
768 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
770 unhash_open_stateid(stp
);
771 free_generic_stateid(stp
);
774 static void unhash_openowner(struct nfs4_openowner
*oo
)
776 struct nfs4_ol_stateid
*stp
;
778 list_del(&oo
->oo_owner
.so_strhash
);
779 list_del(&oo
->oo_perclient
);
780 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
781 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
782 struct nfs4_ol_stateid
, st_perstateowner
);
783 release_open_stateid(stp
);
787 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
789 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
792 free_generic_stateid(s
);
793 oo
->oo_last_closed_stid
= NULL
;
797 static void nfs4_free_openowner(struct nfs4_openowner
*oo
)
799 kfree(oo
->oo_owner
.so_owner
.data
);
800 kmem_cache_free(openowner_slab
, oo
);
803 static void release_openowner(struct nfs4_openowner
*oo
)
805 unhash_openowner(oo
);
806 list_del(&oo
->oo_close_lru
);
807 release_last_closed_stateid(oo
);
808 nfs4_free_openowner(oo
);
812 hash_sessionid(struct nfs4_sessionid
*sessionid
)
814 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
816 return sid
->sequence
% SESSION_HASH_SIZE
;
821 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
823 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
824 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
828 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
834 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
835 * won't be used for replay.
837 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
839 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
841 if (nfserr
== nfserr_replay_me
)
844 if (!seqid_mutating_err(ntohl(nfserr
))) {
845 cstate
->replay_owner
= NULL
;
850 if (so
->so_is_open_owner
)
851 release_last_closed_stateid(openowner(so
));
857 gen_sessionid(struct nfsd4_session
*ses
)
859 struct nfs4_client
*clp
= ses
->se_client
;
860 struct nfsd4_sessionid
*sid
;
862 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
863 sid
->clientid
= clp
->cl_clientid
;
864 sid
->sequence
= current_sessionid
++;
869 * The protocol defines ca_maxresponssize_cached to include the size of
870 * the rpc header, but all we need to cache is the data starting after
871 * the end of the initial SEQUENCE operation--the rest we regenerate
872 * each time. Therefore we can advertise a ca_maxresponssize_cached
873 * value that is the number of bytes in our cache plus a few additional
874 * bytes. In order to stay on the safe side, and not promise more than
875 * we can cache, those additional bytes must be the minimum possible: 24
876 * bytes of rpc header (xid through accept state, with AUTH_NULL
877 * verifier), 12 for the compound header (with zero-length tag), and 44
878 * for the SEQUENCE op response:
880 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
883 free_session_slots(struct nfsd4_session
*ses
)
887 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
888 kfree(ses
->se_slots
[i
]);
892 * We don't actually need to cache the rpc and session headers, so we
893 * can allocate a little less for each slot:
895 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
899 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
902 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
903 return size
+ sizeof(struct nfsd4_slot
);
907 * XXX: If we run out of reserved DRC memory we could (up to a point)
908 * re-negotiate active sessions and reduce their slot usage to make
909 * room for new connections. For now we just fail the create session.
911 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
913 u32 slotsize
= slot_bytes(ca
);
914 u32 num
= ca
->maxreqs
;
917 spin_lock(&nfsd_drc_lock
);
918 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
919 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
920 num
= min_t(int, num
, avail
/ slotsize
);
921 nfsd_drc_mem_used
+= num
* slotsize
;
922 spin_unlock(&nfsd_drc_lock
);
927 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
929 int slotsize
= slot_bytes(ca
);
931 spin_lock(&nfsd_drc_lock
);
932 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
933 spin_unlock(&nfsd_drc_lock
);
936 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
937 struct nfsd4_channel_attrs
*battrs
)
939 int numslots
= fattrs
->maxreqs
;
940 int slotsize
= slot_bytes(fattrs
);
941 struct nfsd4_session
*new;
944 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
945 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
946 mem
= numslots
* sizeof(struct nfsd4_slot
*);
948 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
951 /* allocate each struct nfsd4_slot and data cache in one piece */
952 for (i
= 0; i
< numslots
; i
++) {
953 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
954 if (!new->se_slots
[i
])
958 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
959 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
964 kfree(new->se_slots
[i
]);
969 static void free_conn(struct nfsd4_conn
*c
)
971 svc_xprt_put(c
->cn_xprt
);
975 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
977 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
978 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
980 spin_lock(&clp
->cl_lock
);
981 if (!list_empty(&c
->cn_persession
)) {
982 list_del(&c
->cn_persession
);
985 nfsd4_probe_callback(clp
);
986 spin_unlock(&clp
->cl_lock
);
989 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
991 struct nfsd4_conn
*conn
;
993 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
996 svc_xprt_get(rqstp
->rq_xprt
);
997 conn
->cn_xprt
= rqstp
->rq_xprt
;
998 conn
->cn_flags
= flags
;
999 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
1003 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1005 conn
->cn_session
= ses
;
1006 list_add(&conn
->cn_persession
, &ses
->se_conns
);
1009 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1011 struct nfs4_client
*clp
= ses
->se_client
;
1013 spin_lock(&clp
->cl_lock
);
1014 __nfsd4_hash_conn(conn
, ses
);
1015 spin_unlock(&clp
->cl_lock
);
1018 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
1020 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
1021 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
1024 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
1028 nfsd4_hash_conn(conn
, ses
);
1029 ret
= nfsd4_register_conn(conn
);
1031 /* oops; xprt is already down: */
1032 nfsd4_conn_lost(&conn
->cn_xpt_user
);
1033 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
1034 /* callback channel may be back up */
1035 nfsd4_probe_callback(ses
->se_client
);
1039 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
1041 u32 dir
= NFS4_CDFC4_FORE
;
1043 if (cses
->flags
& SESSION4_BACK_CHAN
)
1044 dir
|= NFS4_CDFC4_BACK
;
1045 return alloc_conn(rqstp
, dir
);
1048 /* must be called under client_lock */
1049 static void nfsd4_del_conns(struct nfsd4_session
*s
)
1051 struct nfs4_client
*clp
= s
->se_client
;
1052 struct nfsd4_conn
*c
;
1054 spin_lock(&clp
->cl_lock
);
1055 while (!list_empty(&s
->se_conns
)) {
1056 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
1057 list_del_init(&c
->cn_persession
);
1058 spin_unlock(&clp
->cl_lock
);
1060 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
1063 spin_lock(&clp
->cl_lock
);
1065 spin_unlock(&clp
->cl_lock
);
1068 static void __free_session(struct nfsd4_session
*ses
)
1070 free_session_slots(ses
);
1074 static void free_session(struct nfsd4_session
*ses
)
1076 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
1078 lockdep_assert_held(&nn
->client_lock
);
1079 nfsd4_del_conns(ses
);
1080 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1081 __free_session(ses
);
1084 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1087 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1089 new->se_client
= clp
;
1092 INIT_LIST_HEAD(&new->se_conns
);
1094 new->se_cb_seq_nr
= 1;
1095 new->se_flags
= cses
->flags
;
1096 new->se_cb_prog
= cses
->callback_prog
;
1097 new->se_cb_sec
= cses
->cb_sec
;
1098 atomic_set(&new->se_ref
, 0);
1099 idx
= hash_sessionid(&new->se_sessionid
);
1100 spin_lock(&nn
->client_lock
);
1101 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1102 spin_lock(&clp
->cl_lock
);
1103 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1104 spin_unlock(&clp
->cl_lock
);
1105 spin_unlock(&nn
->client_lock
);
1107 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1108 struct sockaddr
*sa
= svc_addr(rqstp
);
1110 * This is a little silly; with sessions there's no real
1111 * use for the callback address. Use the peer address
1112 * as a reasonable default for now, but consider fixing
1113 * the rpc client not to require an address in the
1116 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1117 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1121 /* caller must hold client_lock */
1122 static struct nfsd4_session
*
1123 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1125 struct nfsd4_session
*elem
;
1127 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1129 dump_sessionid(__func__
, sessionid
);
1130 idx
= hash_sessionid(sessionid
);
1131 /* Search in the appropriate list */
1132 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1133 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1134 NFS4_MAX_SESSIONID_LEN
)) {
1139 dprintk("%s: session not found\n", __func__
);
1143 /* caller must hold client_lock */
1145 unhash_session(struct nfsd4_session
*ses
)
1147 list_del(&ses
->se_hash
);
1148 spin_lock(&ses
->se_client
->cl_lock
);
1149 list_del(&ses
->se_perclnt
);
1150 spin_unlock(&ses
->se_client
->cl_lock
);
1153 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1155 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1157 if (clid
->cl_boot
== nn
->boot_time
)
1159 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1160 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1165 * XXX Should we use a slab cache ?
1166 * This type of memory management is somewhat inefficient, but we use it
1167 * anyway since SETCLIENTID is not a common operation.
1169 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1171 struct nfs4_client
*clp
;
1173 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1176 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1177 if (clp
->cl_name
.data
== NULL
) {
1181 clp
->cl_name
.len
= name
.len
;
1182 INIT_LIST_HEAD(&clp
->cl_sessions
);
1183 idr_init(&clp
->cl_stateids
);
1184 atomic_set(&clp
->cl_refcount
, 0);
1185 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1186 INIT_LIST_HEAD(&clp
->cl_idhash
);
1187 INIT_LIST_HEAD(&clp
->cl_openowners
);
1188 INIT_LIST_HEAD(&clp
->cl_delegations
);
1189 INIT_LIST_HEAD(&clp
->cl_lru
);
1190 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1191 INIT_LIST_HEAD(&clp
->cl_revoked
);
1192 spin_lock_init(&clp
->cl_lock
);
1193 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1198 free_client(struct nfs4_client
*clp
)
1200 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1202 lockdep_assert_held(&nn
->client_lock
);
1203 while (!list_empty(&clp
->cl_sessions
)) {
1204 struct nfsd4_session
*ses
;
1205 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1207 list_del(&ses
->se_perclnt
);
1208 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1211 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1212 free_svc_cred(&clp
->cl_cred
);
1213 kfree(clp
->cl_name
.data
);
1214 idr_destroy(&clp
->cl_stateids
);
1218 /* must be called under the client_lock */
1220 unhash_client_locked(struct nfs4_client
*clp
)
1222 struct nfsd4_session
*ses
;
1224 list_del(&clp
->cl_lru
);
1225 spin_lock(&clp
->cl_lock
);
1226 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1227 list_del_init(&ses
->se_hash
);
1228 spin_unlock(&clp
->cl_lock
);
1232 destroy_client(struct nfs4_client
*clp
)
1234 struct nfs4_openowner
*oo
;
1235 struct nfs4_delegation
*dp
;
1236 struct list_head reaplist
;
1237 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1239 INIT_LIST_HEAD(&reaplist
);
1240 spin_lock(&state_lock
);
1241 while (!list_empty(&clp
->cl_delegations
)) {
1242 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1243 list_del_init(&dp
->dl_perclnt
);
1244 list_move(&dp
->dl_recall_lru
, &reaplist
);
1246 spin_unlock(&state_lock
);
1247 while (!list_empty(&reaplist
)) {
1248 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1249 destroy_delegation(dp
);
1251 list_splice_init(&clp
->cl_revoked
, &reaplist
);
1252 while (!list_empty(&reaplist
)) {
1253 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1254 destroy_revoked_delegation(dp
);
1256 while (!list_empty(&clp
->cl_openowners
)) {
1257 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1258 release_openowner(oo
);
1260 nfsd4_shutdown_callback(clp
);
1261 if (clp
->cl_cb_conn
.cb_xprt
)
1262 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1263 list_del(&clp
->cl_idhash
);
1264 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1265 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1267 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1268 spin_lock(&nn
->client_lock
);
1269 unhash_client_locked(clp
);
1270 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1272 spin_unlock(&nn
->client_lock
);
1275 static void expire_client(struct nfs4_client
*clp
)
1277 nfsd4_client_record_remove(clp
);
1278 destroy_client(clp
);
1281 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1283 memcpy(target
->cl_verifier
.data
, source
->data
,
1284 sizeof(target
->cl_verifier
.data
));
1287 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1289 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1290 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1293 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1295 if (source
->cr_principal
) {
1296 target
->cr_principal
=
1297 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1298 if (target
->cr_principal
== NULL
)
1301 target
->cr_principal
= NULL
;
1302 target
->cr_flavor
= source
->cr_flavor
;
1303 target
->cr_uid
= source
->cr_uid
;
1304 target
->cr_gid
= source
->cr_gid
;
1305 target
->cr_group_info
= source
->cr_group_info
;
1306 get_group_info(target
->cr_group_info
);
1307 target
->cr_gss_mech
= source
->cr_gss_mech
;
1308 if (source
->cr_gss_mech
)
1309 gss_mech_get(source
->cr_gss_mech
);
1314 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1318 res
= o1
->len
- o2
->len
;
1321 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1324 static int same_name(const char *n1
, const char *n2
)
1326 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1330 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1332 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1336 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1338 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1341 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1345 if (g1
->ngroups
!= g2
->ngroups
)
1347 for (i
=0; i
<g1
->ngroups
; i
++)
1348 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1354 * RFC 3530 language requires clid_inuse be returned when the
1355 * "principal" associated with a requests differs from that previously
1356 * used. We use uid, gid's, and gss principal string as our best
1357 * approximation. We also don't want to allow non-gss use of a client
1358 * established using gss: in theory cr_principal should catch that
1359 * change, but in practice cr_principal can be null even in the gss case
1360 * since gssd doesn't always pass down a principal string.
1362 static bool is_gss_cred(struct svc_cred
*cr
)
1364 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1365 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1370 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1372 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1373 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1374 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1375 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1377 if (cr1
->cr_principal
== cr2
->cr_principal
)
1379 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1381 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1384 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1386 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1389 if (!cr
->cr_gss_mech
)
1391 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1392 return service
== RPC_GSS_SVC_INTEGRITY
||
1393 service
== RPC_GSS_SVC_PRIVACY
;
1396 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1398 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1400 if (!cl
->cl_mach_cred
)
1402 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1404 if (!svc_rqst_integrity_protected(rqstp
))
1406 if (!cr
->cr_principal
)
1408 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1411 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1413 static u32 current_clientid
= 1;
1415 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1416 clp
->cl_clientid
.cl_id
= current_clientid
++;
1419 static void gen_confirm(struct nfs4_client
*clp
)
1425 * This is opaque to client, so no need to byte-swap. Use
1426 * __force to keep sparse happy
1428 verf
[0] = (__force __be32
)get_seconds();
1429 verf
[1] = (__force __be32
)i
++;
1430 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1433 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1435 struct nfs4_stid
*ret
;
1437 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1438 if (!ret
|| !ret
->sc_type
)
1443 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1445 struct nfs4_stid
*s
;
1447 s
= find_stateid(cl
, t
);
1450 if (typemask
& s
->sc_type
)
1455 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1456 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1458 struct nfs4_client
*clp
;
1459 struct sockaddr
*sa
= svc_addr(rqstp
);
1461 struct net
*net
= SVC_NET(rqstp
);
1462 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1464 clp
= alloc_client(name
);
1468 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1470 spin_lock(&nn
->client_lock
);
1472 spin_unlock(&nn
->client_lock
);
1475 nfsd4_init_callback(&clp
->cl_cb_null
);
1476 clp
->cl_time
= get_seconds();
1477 clear_bit(0, &clp
->cl_cb_slot_busy
);
1478 copy_verf(clp
, verf
);
1479 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1481 clp
->cl_cb_session
= NULL
;
1487 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1489 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1490 struct nfs4_client
*clp
;
1493 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1496 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1497 new = &((*new)->rb_left
);
1499 new = &((*new)->rb_right
);
1502 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1503 rb_insert_color(&new_clp
->cl_namenode
, root
);
1506 static struct nfs4_client
*
1507 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1510 struct rb_node
*node
= root
->rb_node
;
1511 struct nfs4_client
*clp
;
1514 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1515 cmp
= compare_blob(&clp
->cl_name
, name
);
1517 node
= node
->rb_left
;
1519 node
= node
->rb_right
;
1527 add_to_unconfirmed(struct nfs4_client
*clp
)
1529 unsigned int idhashval
;
1530 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1532 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1533 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1534 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1535 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1540 move_to_confirmed(struct nfs4_client
*clp
)
1542 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1543 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1545 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1546 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1547 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1548 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1549 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1553 static struct nfs4_client
*
1554 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1556 struct nfs4_client
*clp
;
1557 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1559 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1560 if (same_clid(&clp
->cl_clientid
, clid
)) {
1561 if ((bool)clp
->cl_minorversion
!= sessions
)
1570 static struct nfs4_client
*
1571 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1573 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1575 return find_client_in_id_table(tbl
, clid
, sessions
);
1578 static struct nfs4_client
*
1579 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1581 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1583 return find_client_in_id_table(tbl
, clid
, sessions
);
1586 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1588 return clp
->cl_exchange_flags
!= 0;
1591 static struct nfs4_client
*
1592 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1594 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1597 static struct nfs4_client
*
1598 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1600 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1604 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1606 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1607 struct sockaddr
*sa
= svc_addr(rqstp
);
1608 u32 scopeid
= rpc_get_scope_id(sa
);
1609 unsigned short expected_family
;
1611 /* Currently, we only support tcp and tcp6 for the callback channel */
1612 if (se
->se_callback_netid_len
== 3 &&
1613 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1614 expected_family
= AF_INET
;
1615 else if (se
->se_callback_netid_len
== 4 &&
1616 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1617 expected_family
= AF_INET6
;
1621 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1622 se
->se_callback_addr_len
,
1623 (struct sockaddr
*)&conn
->cb_addr
,
1624 sizeof(conn
->cb_addr
));
1626 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1629 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1630 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1632 conn
->cb_prog
= se
->se_callback_prog
;
1633 conn
->cb_ident
= se
->se_callback_ident
;
1634 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1637 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1638 conn
->cb_addrlen
= 0;
1639 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1640 "will not receive delegations\n",
1641 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1647 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1650 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1652 struct xdr_buf
*buf
= resp
->xdr
.buf
;
1653 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1656 dprintk("--> %s slot %p\n", __func__
, slot
);
1658 slot
->sl_opcnt
= resp
->opcnt
;
1659 slot
->sl_status
= resp
->cstate
.status
;
1661 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1662 if (nfsd4_not_cached(resp
)) {
1663 slot
->sl_datalen
= 0;
1666 base
= resp
->cstate
.data_offset
;
1667 slot
->sl_datalen
= buf
->len
- base
;
1668 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
1669 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1674 * Encode the replay sequence operation from the slot values.
1675 * If cachethis is FALSE encode the uncached rep error on the next
1676 * operation which sets resp->p and increments resp->opcnt for
1677 * nfs4svc_encode_compoundres.
1681 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1682 struct nfsd4_compoundres
*resp
)
1684 struct nfsd4_op
*op
;
1685 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1687 /* Encode the replayed sequence operation */
1688 op
= &args
->ops
[resp
->opcnt
- 1];
1689 nfsd4_encode_operation(resp
, op
);
1691 /* Return nfserr_retry_uncached_rep in next operation. */
1692 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1693 op
= &args
->ops
[resp
->opcnt
++];
1694 op
->status
= nfserr_retry_uncached_rep
;
1695 nfsd4_encode_operation(resp
, op
);
1701 * The sequence operation is not cached because we can use the slot and
1705 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1706 struct nfsd4_sequence
*seq
)
1708 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1709 struct xdr_stream
*xdr
= &resp
->xdr
;
1713 dprintk("--> %s slot %p\n", __func__
, slot
);
1715 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1719 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
1722 return nfserr_serverfault
;
1724 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
1725 xdr_commit_encode(xdr
);
1727 resp
->opcnt
= slot
->sl_opcnt
;
1728 return slot
->sl_status
;
1732 * Set the exchange_id flags returned by the server.
1735 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1737 /* pNFS is not supported */
1738 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1740 /* Referrals are supported, Migration is not. */
1741 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1743 /* set the wire flags to return to client. */
1744 clid
->flags
= new->cl_exchange_flags
;
1747 static bool client_has_state(struct nfs4_client
*clp
)
1750 * Note clp->cl_openowners check isn't quite right: there's no
1751 * need to count owners without stateid's.
1753 * Also note we should probably be using this in 4.0 case too.
1755 return !list_empty(&clp
->cl_openowners
)
1756 || !list_empty(&clp
->cl_delegations
)
1757 || !list_empty(&clp
->cl_sessions
);
1761 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1762 struct nfsd4_compound_state
*cstate
,
1763 struct nfsd4_exchange_id
*exid
)
1765 struct nfs4_client
*unconf
, *conf
, *new;
1767 char addr_str
[INET6_ADDRSTRLEN
];
1768 nfs4_verifier verf
= exid
->verifier
;
1769 struct sockaddr
*sa
= svc_addr(rqstp
);
1770 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1771 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1773 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1774 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1775 "ip_addr=%s flags %x, spa_how %d\n",
1776 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1777 addr_str
, exid
->flags
, exid
->spa_how
);
1779 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1780 return nfserr_inval
;
1782 switch (exid
->spa_how
) {
1784 if (!svc_rqst_integrity_protected(rqstp
))
1785 return nfserr_inval
;
1788 default: /* checked by xdr code */
1791 return nfserr_encr_alg_unsupp
;
1794 /* Cases below refer to rfc 5661 section 18.35.4: */
1796 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1798 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1799 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1802 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1803 status
= nfserr_inval
;
1806 if (!mach_creds_match(conf
, rqstp
)) {
1807 status
= nfserr_wrong_cred
;
1810 if (!creds_match
) { /* case 9 */
1811 status
= nfserr_perm
;
1814 if (!verfs_match
) { /* case 8 */
1815 status
= nfserr_not_same
;
1819 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1823 if (!creds_match
) { /* case 3 */
1824 if (client_has_state(conf
)) {
1825 status
= nfserr_clid_inuse
;
1828 expire_client(conf
);
1831 if (verfs_match
) { /* case 2 */
1832 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1836 /* case 5, client reboot */
1840 if (update
) { /* case 7 */
1841 status
= nfserr_noent
;
1845 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1846 if (unconf
) /* case 4, possible retry or client restart */
1847 expire_client(unconf
);
1849 /* case 1 (normal case) */
1851 new = create_client(exid
->clname
, rqstp
, &verf
);
1853 status
= nfserr_jukebox
;
1856 new->cl_minorversion
= cstate
->minorversion
;
1857 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1860 add_to_unconfirmed(new);
1862 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1863 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1865 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1866 nfsd4_set_ex_flags(new, exid
);
1868 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1869 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1873 nfs4_unlock_state();
1878 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1880 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1883 /* The slot is in use, and no response has been sent. */
1885 if (seqid
== slot_seqid
)
1886 return nfserr_jukebox
;
1888 return nfserr_seq_misordered
;
1890 /* Note unsigned 32-bit arithmetic handles wraparound: */
1891 if (likely(seqid
== slot_seqid
+ 1))
1893 if (seqid
== slot_seqid
)
1894 return nfserr_replay_cache
;
1895 return nfserr_seq_misordered
;
1899 * Cache the create session result into the create session single DRC
1900 * slot cache by saving the xdr structure. sl_seqid has been set.
1901 * Do this for solo or embedded create session operations.
1904 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1905 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1907 slot
->sl_status
= nfserr
;
1908 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1912 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1913 struct nfsd4_clid_slot
*slot
)
1915 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1916 return slot
->sl_status
;
1919 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1920 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1921 1 + /* MIN tag is length with zero, only length */ \
1922 3 + /* version, opcount, opcode */ \
1923 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1924 /* seqid, slotID, slotID, cache */ \
1925 4 ) * sizeof(__be32))
1927 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1928 2 + /* verifier: AUTH_NULL, length 0 */\
1930 1 + /* MIN tag is length with zero, only length */ \
1931 3 + /* opcount, opcode, opstatus*/ \
1932 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1933 /* seqid, slotID, slotID, slotID, status */ \
1934 5 ) * sizeof(__be32))
1936 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1938 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1940 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1941 return nfserr_toosmall
;
1942 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1943 return nfserr_toosmall
;
1944 ca
->headerpadsz
= 0;
1945 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1946 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1947 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1948 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1949 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1950 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1952 * Note decreasing slot size below client's request may make it
1953 * difficult for client to function correctly, whereas
1954 * decreasing the number of slots will (just?) affect
1955 * performance. When short on memory we therefore prefer to
1956 * decrease number of slots instead of their size. Clients that
1957 * request larger slots than they need will get poor results:
1959 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1961 return nfserr_jukebox
;
1966 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
1967 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
1968 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
1969 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
1971 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1973 ca
->headerpadsz
= 0;
1976 * These RPC_MAX_HEADER macros are overkill, especially since we
1977 * don't even do gss on the backchannel yet. But this is still
1978 * less than 1k. Tighten up this estimate in the unlikely event
1979 * it turns out to be a problem for some client:
1981 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
1982 return nfserr_toosmall
;
1983 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
1984 return nfserr_toosmall
;
1985 ca
->maxresp_cached
= 0;
1987 return nfserr_toosmall
;
1992 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1994 switch (cbs
->flavor
) {
2000 * GSS case: the spec doesn't allow us to return this
2001 * error. But it also doesn't allow us not to support
2003 * I'd rather this fail hard than return some error the
2004 * client might think it can already handle:
2006 return nfserr_encr_alg_unsupp
;
2011 nfsd4_create_session(struct svc_rqst
*rqstp
,
2012 struct nfsd4_compound_state
*cstate
,
2013 struct nfsd4_create_session
*cr_ses
)
2015 struct sockaddr
*sa
= svc_addr(rqstp
);
2016 struct nfs4_client
*conf
, *unconf
;
2017 struct nfsd4_session
*new;
2018 struct nfsd4_conn
*conn
;
2019 struct nfsd4_clid_slot
*cs_slot
= NULL
;
2021 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2023 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
2024 return nfserr_inval
;
2025 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
2028 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
2031 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
2033 goto out_release_drc_mem
;
2034 status
= nfserr_jukebox
;
2035 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
2037 goto out_release_drc_mem
;
2038 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
2040 goto out_free_session
;
2043 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
2044 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
2045 WARN_ON_ONCE(conf
&& unconf
);
2048 status
= nfserr_wrong_cred
;
2049 if (!mach_creds_match(conf
, rqstp
))
2051 cs_slot
= &conf
->cl_cs_slot
;
2052 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2053 if (status
== nfserr_replay_cache
) {
2054 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
2056 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
2057 status
= nfserr_seq_misordered
;
2060 } else if (unconf
) {
2061 struct nfs4_client
*old
;
2062 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
2063 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
2064 status
= nfserr_clid_inuse
;
2067 status
= nfserr_wrong_cred
;
2068 if (!mach_creds_match(unconf
, rqstp
))
2070 cs_slot
= &unconf
->cl_cs_slot
;
2071 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
2073 /* an unconfirmed replay returns misordered */
2074 status
= nfserr_seq_misordered
;
2077 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2079 status
= mark_client_expired(old
);
2084 move_to_confirmed(unconf
);
2087 status
= nfserr_stale_clientid
;
2092 * We do not support RDMA or persistent sessions
2094 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2095 cr_ses
->flags
&= ~SESSION4_RDMA
;
2097 init_session(rqstp
, new, conf
, cr_ses
);
2098 nfsd4_init_conn(rqstp
, conn
, new);
2100 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2101 NFS4_MAX_SESSIONID_LEN
);
2102 cs_slot
->sl_seqid
++;
2103 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2105 /* cache solo and embedded create sessions under the state lock */
2106 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2107 nfs4_unlock_state();
2110 nfs4_unlock_state();
2113 __free_session(new);
2114 out_release_drc_mem
:
2115 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2119 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2122 case NFS4_CDFC4_FORE
:
2123 case NFS4_CDFC4_BACK
:
2125 case NFS4_CDFC4_FORE_OR_BOTH
:
2126 case NFS4_CDFC4_BACK_OR_BOTH
:
2127 *dir
= NFS4_CDFC4_BOTH
;
2130 return nfserr_inval
;
2133 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2135 struct nfsd4_session
*session
= cstate
->session
;
2136 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2139 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2142 spin_lock(&nn
->client_lock
);
2143 session
->se_cb_prog
= bc
->bc_cb_program
;
2144 session
->se_cb_sec
= bc
->bc_cb_sec
;
2145 spin_unlock(&nn
->client_lock
);
2147 nfsd4_probe_callback(session
->se_client
);
2152 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2153 struct nfsd4_compound_state
*cstate
,
2154 struct nfsd4_bind_conn_to_session
*bcts
)
2157 struct nfsd4_conn
*conn
;
2158 struct nfsd4_session
*session
;
2159 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2161 if (!nfsd4_last_compound_op(rqstp
))
2162 return nfserr_not_only_op
;
2164 spin_lock(&nn
->client_lock
);
2165 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2166 spin_unlock(&nn
->client_lock
);
2167 status
= nfserr_badsession
;
2170 status
= nfserr_wrong_cred
;
2171 if (!mach_creds_match(session
->se_client
, rqstp
))
2173 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2176 conn
= alloc_conn(rqstp
, bcts
->dir
);
2177 status
= nfserr_jukebox
;
2180 nfsd4_init_conn(rqstp
, conn
, session
);
2183 nfs4_unlock_state();
2187 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2191 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2195 nfsd4_destroy_session(struct svc_rqst
*r
,
2196 struct nfsd4_compound_state
*cstate
,
2197 struct nfsd4_destroy_session
*sessionid
)
2199 struct nfsd4_session
*ses
;
2201 int ref_held_by_me
= 0;
2202 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2205 status
= nfserr_not_only_op
;
2206 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2207 if (!nfsd4_last_compound_op(r
))
2211 dump_sessionid(__func__
, &sessionid
->sessionid
);
2212 spin_lock(&nn
->client_lock
);
2213 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2214 status
= nfserr_badsession
;
2216 goto out_client_lock
;
2217 status
= nfserr_wrong_cred
;
2218 if (!mach_creds_match(ses
->se_client
, r
))
2219 goto out_client_lock
;
2220 nfsd4_get_session_locked(ses
);
2221 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2223 goto out_put_session
;
2224 unhash_session(ses
);
2225 spin_unlock(&nn
->client_lock
);
2227 nfsd4_probe_callback_sync(ses
->se_client
);
2229 spin_lock(&nn
->client_lock
);
2232 nfsd4_put_session(ses
);
2234 spin_unlock(&nn
->client_lock
);
2236 nfs4_unlock_state();
2240 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2242 struct nfsd4_conn
*c
;
2244 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2245 if (c
->cn_xprt
== xpt
) {
2252 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2254 struct nfs4_client
*clp
= ses
->se_client
;
2255 struct nfsd4_conn
*c
;
2256 __be32 status
= nfs_ok
;
2259 spin_lock(&clp
->cl_lock
);
2260 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2263 status
= nfserr_conn_not_bound_to_session
;
2264 if (clp
->cl_mach_cred
)
2266 __nfsd4_hash_conn(new, ses
);
2267 spin_unlock(&clp
->cl_lock
);
2268 ret
= nfsd4_register_conn(new);
2270 /* oops; xprt is already down: */
2271 nfsd4_conn_lost(&new->cn_xpt_user
);
2274 spin_unlock(&clp
->cl_lock
);
2279 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2281 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2283 return args
->opcnt
> session
->se_fchannel
.maxops
;
2286 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2287 struct nfsd4_session
*session
)
2289 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2291 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2295 nfsd4_sequence(struct svc_rqst
*rqstp
,
2296 struct nfsd4_compound_state
*cstate
,
2297 struct nfsd4_sequence
*seq
)
2299 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2300 struct xdr_stream
*xdr
= &resp
->xdr
;
2301 struct nfsd4_session
*session
;
2302 struct nfs4_client
*clp
;
2303 struct nfsd4_slot
*slot
;
2304 struct nfsd4_conn
*conn
;
2307 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2309 if (resp
->opcnt
!= 1)
2310 return nfserr_sequence_pos
;
2313 * Will be either used or freed by nfsd4_sequence_check_conn
2316 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2318 return nfserr_jukebox
;
2320 spin_lock(&nn
->client_lock
);
2321 status
= nfserr_badsession
;
2322 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2324 goto out_no_session
;
2325 clp
= session
->se_client
;
2326 status
= get_client_locked(clp
);
2328 goto out_no_session
;
2329 status
= nfsd4_get_session_locked(session
);
2331 goto out_put_client
;
2333 status
= nfserr_too_many_ops
;
2334 if (nfsd4_session_too_many_ops(rqstp
, session
))
2335 goto out_put_session
;
2337 status
= nfserr_req_too_big
;
2338 if (nfsd4_request_too_big(rqstp
, session
))
2339 goto out_put_session
;
2341 status
= nfserr_badslot
;
2342 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2343 goto out_put_session
;
2345 slot
= session
->se_slots
[seq
->slotid
];
2346 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2348 /* We do not negotiate the number of slots yet, so set the
2349 * maxslots to the session maxreqs which is used to encode
2350 * sr_highest_slotid and the sr_target_slot id to maxslots */
2351 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2353 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2354 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2355 if (status
== nfserr_replay_cache
) {
2356 status
= nfserr_seq_misordered
;
2357 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2358 goto out_put_session
;
2359 cstate
->slot
= slot
;
2360 cstate
->session
= session
;
2361 /* Return the cached reply status and set cstate->status
2362 * for nfsd4_proc_compound processing */
2363 status
= nfsd4_replay_cache_entry(resp
, seq
);
2364 cstate
->status
= nfserr_replay_cache
;
2368 goto out_put_session
;
2370 status
= nfsd4_sequence_check_conn(conn
, session
);
2373 goto out_put_session
;
2375 buflen
= (seq
->cachethis
) ?
2376 session
->se_fchannel
.maxresp_cached
:
2377 session
->se_fchannel
.maxresp_sz
;
2378 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2380 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2381 goto out_put_session
;
2382 svc_reserve(rqstp
, buflen
);
2385 /* Success! bump slot seqid */
2386 slot
->sl_seqid
= seq
->seqid
;
2387 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2389 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2391 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2393 cstate
->slot
= slot
;
2394 cstate
->session
= session
;
2397 switch (clp
->cl_cb_state
) {
2399 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2401 case NFSD4_CB_FAULT
:
2402 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2405 seq
->status_flags
= 0;
2407 if (!list_empty(&clp
->cl_revoked
))
2408 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2412 spin_unlock(&nn
->client_lock
);
2415 nfsd4_put_session(session
);
2417 put_client_renew_locked(clp
);
2418 goto out_no_session
;
2422 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2424 struct nfs4_client
*conf
, *unconf
, *clp
;
2426 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2429 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2430 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2431 WARN_ON_ONCE(conf
&& unconf
);
2436 if (client_has_state(conf
)) {
2437 status
= nfserr_clientid_busy
;
2443 status
= nfserr_stale_clientid
;
2446 if (!mach_creds_match(clp
, rqstp
)) {
2447 status
= nfserr_wrong_cred
;
2452 nfs4_unlock_state();
2457 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2461 if (rc
->rca_one_fs
) {
2462 if (!cstate
->current_fh
.fh_dentry
)
2463 return nfserr_nofilehandle
;
2465 * We don't take advantage of the rca_one_fs case.
2466 * That's OK, it's optional, we can safely ignore it.
2472 status
= nfserr_complete_already
;
2473 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2474 &cstate
->session
->se_client
->cl_flags
))
2477 status
= nfserr_stale_clientid
;
2478 if (is_client_expired(cstate
->session
->se_client
))
2480 * The following error isn't really legal.
2481 * But we only get here if the client just explicitly
2482 * destroyed the client. Surely it no longer cares what
2483 * error it gets back on an operation for the dead
2489 nfsd4_client_record_create(cstate
->session
->se_client
);
2491 nfs4_unlock_state();
2496 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2497 struct nfsd4_setclientid
*setclid
)
2499 struct xdr_netobj clname
= setclid
->se_name
;
2500 nfs4_verifier clverifier
= setclid
->se_verf
;
2501 struct nfs4_client
*conf
, *unconf
, *new;
2503 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2505 /* Cases below refer to rfc 3530 section 14.2.33: */
2507 conf
= find_confirmed_client_by_name(&clname
, nn
);
2510 status
= nfserr_clid_inuse
;
2511 if (clp_used_exchangeid(conf
))
2513 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2514 char addr_str
[INET6_ADDRSTRLEN
];
2515 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2517 dprintk("NFSD: setclientid: string in use by client "
2518 "at %s\n", addr_str
);
2522 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2524 expire_client(unconf
);
2525 status
= nfserr_jukebox
;
2526 new = create_client(clname
, rqstp
, &clverifier
);
2529 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2530 /* case 1: probable callback update */
2531 copy_clid(new, conf
);
2532 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2534 new->cl_minorversion
= 0;
2535 gen_callback(new, setclid
, rqstp
);
2536 add_to_unconfirmed(new);
2537 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2538 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2539 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2542 nfs4_unlock_state();
2548 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2549 struct nfsd4_compound_state
*cstate
,
2550 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2552 struct nfs4_client
*conf
, *unconf
;
2553 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2554 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2556 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2558 if (STALE_CLIENTID(clid
, nn
))
2559 return nfserr_stale_clientid
;
2562 conf
= find_confirmed_client(clid
, false, nn
);
2563 unconf
= find_unconfirmed_client(clid
, false, nn
);
2565 * We try hard to give out unique clientid's, so if we get an
2566 * attempt to confirm the same clientid with a different cred,
2567 * there's a bug somewhere. Let's charitably assume it's our
2570 status
= nfserr_serverfault
;
2571 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2573 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2575 /* cases below refer to rfc 3530 section 14.2.34: */
2576 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2577 if (conf
&& !unconf
) /* case 2: probable retransmit */
2579 else /* case 4: client hasn't noticed we rebooted yet? */
2580 status
= nfserr_stale_clientid
;
2584 if (conf
) { /* case 1: callback update */
2585 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2586 nfsd4_probe_callback(conf
);
2587 expire_client(unconf
);
2588 } else { /* case 3: normal case; new or rebooted client */
2589 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2591 status
= mark_client_expired(conf
);
2594 expire_client(conf
);
2596 move_to_confirmed(unconf
);
2597 nfsd4_probe_callback(unconf
);
2600 nfs4_unlock_state();
2604 static struct nfs4_file
*nfsd4_alloc_file(void)
2606 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2609 /* OPEN Share state helper functions */
2610 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2612 unsigned int hashval
= file_hashval(ino
);
2614 lockdep_assert_held(&state_lock
);
2616 atomic_set(&fp
->fi_ref
, 1);
2617 INIT_LIST_HEAD(&fp
->fi_stateids
);
2618 INIT_LIST_HEAD(&fp
->fi_delegations
);
2621 fp
->fi_had_conflict
= false;
2622 fp
->fi_lease
= NULL
;
2623 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2624 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2625 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2629 nfsd4_free_slabs(void)
2631 kmem_cache_destroy(openowner_slab
);
2632 kmem_cache_destroy(lockowner_slab
);
2633 kmem_cache_destroy(file_slab
);
2634 kmem_cache_destroy(stateid_slab
);
2635 kmem_cache_destroy(deleg_slab
);
2639 nfsd4_init_slabs(void)
2641 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2642 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2643 if (openowner_slab
== NULL
)
2645 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2646 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2647 if (lockowner_slab
== NULL
)
2648 goto out_free_openowner_slab
;
2649 file_slab
= kmem_cache_create("nfsd4_files",
2650 sizeof(struct nfs4_file
), 0, 0, NULL
);
2651 if (file_slab
== NULL
)
2652 goto out_free_lockowner_slab
;
2653 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2654 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2655 if (stateid_slab
== NULL
)
2656 goto out_free_file_slab
;
2657 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2658 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2659 if (deleg_slab
== NULL
)
2660 goto out_free_stateid_slab
;
2663 out_free_stateid_slab
:
2664 kmem_cache_destroy(stateid_slab
);
2666 kmem_cache_destroy(file_slab
);
2667 out_free_lockowner_slab
:
2668 kmem_cache_destroy(lockowner_slab
);
2669 out_free_openowner_slab
:
2670 kmem_cache_destroy(openowner_slab
);
2672 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2676 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2678 rp
->rp_status
= nfserr_serverfault
;
2680 rp
->rp_buf
= rp
->rp_ibuf
;
2683 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2685 struct nfs4_stateowner
*sop
;
2687 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2691 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2692 if (!sop
->so_owner
.data
) {
2693 kmem_cache_free(slab
, sop
);
2696 sop
->so_owner
.len
= owner
->len
;
2698 INIT_LIST_HEAD(&sop
->so_stateids
);
2699 sop
->so_client
= clp
;
2700 init_nfs4_replay(&sop
->so_replay
);
2704 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2706 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2708 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2709 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2712 static struct nfs4_openowner
*
2713 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2714 struct nfs4_openowner
*oo
;
2716 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2719 oo
->oo_owner
.so_is_open_owner
= 1;
2720 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2721 oo
->oo_flags
= NFS4_OO_NEW
;
2723 oo
->oo_last_closed_stid
= NULL
;
2724 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2725 hash_openowner(oo
, clp
, strhashval
);
2729 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2730 struct nfs4_openowner
*oo
= open
->op_openowner
;
2732 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2733 INIT_LIST_HEAD(&stp
->st_lockowners
);
2734 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2735 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2736 stp
->st_stateowner
= &oo
->oo_owner
;
2739 stp
->st_access_bmap
= 0;
2740 stp
->st_deny_bmap
= 0;
2741 set_access(open
->op_share_access
, stp
);
2742 set_deny(open
->op_share_deny
, stp
);
2743 stp
->st_openstp
= NULL
;
2747 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2749 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2751 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2753 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2754 oo
->oo_time
= get_seconds();
2758 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2761 return (sop
->so_owner
.len
== owner
->len
) &&
2762 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2763 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2766 static struct nfs4_openowner
*
2767 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2768 bool sessions
, struct nfsd_net
*nn
)
2770 struct nfs4_stateowner
*so
;
2771 struct nfs4_openowner
*oo
;
2772 struct nfs4_client
*clp
;
2774 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2775 if (!so
->so_is_open_owner
)
2777 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2779 clp
= oo
->oo_owner
.so_client
;
2780 if ((bool)clp
->cl_minorversion
!= sessions
)
2782 renew_client(oo
->oo_owner
.so_client
);
2789 /* search file_hashtbl[] for file */
2790 static struct nfs4_file
*
2791 find_file_locked(struct inode
*ino
)
2793 unsigned int hashval
= file_hashval(ino
);
2794 struct nfs4_file
*fp
;
2796 lockdep_assert_held(&state_lock
);
2798 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2799 if (fp
->fi_inode
== ino
) {
2807 static struct nfs4_file
*
2808 find_file(struct inode
*ino
)
2810 struct nfs4_file
*fp
;
2812 spin_lock(&state_lock
);
2813 fp
= find_file_locked(ino
);
2814 spin_unlock(&state_lock
);
2818 static struct nfs4_file
*
2819 find_or_add_file(struct inode
*ino
, struct nfs4_file
*new)
2821 struct nfs4_file
*fp
;
2823 spin_lock(&state_lock
);
2824 fp
= find_file_locked(ino
);
2826 nfsd4_init_file(new, ino
);
2829 spin_unlock(&state_lock
);
2835 * Called to check deny when READ with all zero stateid or
2836 * WRITE with all zero or all one stateid
2839 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2841 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2842 struct nfs4_file
*fp
;
2843 struct nfs4_ol_stateid
*stp
;
2846 fp
= find_file(ino
);
2849 ret
= nfserr_locked
;
2850 /* Search for conflicting share reservations */
2851 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2852 if (test_deny(deny_type
, stp
) ||
2853 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2862 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2864 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2865 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2867 lockdep_assert_held(&state_lock
);
2868 /* We're assuming the state code never drops its reference
2869 * without first removing the lease. Since we're in this lease
2870 * callback (and since the lease code is serialized by the kernel
2871 * lock) we know the server hasn't removed the lease yet, we know
2872 * it's safe to take a reference: */
2873 atomic_inc(&dp
->dl_count
);
2875 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2877 /* Only place dl_time is set; protected by i_lock: */
2878 dp
->dl_time
= get_seconds();
2880 block_delegations(&dp
->dl_fh
);
2882 nfsd4_cb_recall(dp
);
2885 /* Called from break_lease() with i_lock held. */
2886 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2888 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2889 struct nfs4_delegation
*dp
;
2892 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2895 if (fp
->fi_had_conflict
) {
2896 WARN(1, "duplicate break on %p\n", fp
);
2900 * We don't want the locks code to timeout the lease for us;
2901 * we'll remove it ourself if a delegation isn't returned
2904 fl
->fl_break_time
= 0;
2906 spin_lock(&state_lock
);
2907 fp
->fi_had_conflict
= true;
2908 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2909 nfsd_break_one_deleg(dp
);
2910 spin_unlock(&state_lock
);
2914 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2917 return lease_modify(onlist
, arg
);
2922 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2923 .lm_break
= nfsd_break_deleg_cb
,
2924 .lm_change
= nfsd_change_deleg_cb
,
2927 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2929 if (nfsd4_has_session(cstate
))
2931 if (seqid
== so
->so_seqid
- 1)
2932 return nfserr_replay_me
;
2933 if (seqid
== so
->so_seqid
)
2935 return nfserr_bad_seqid
;
2939 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2940 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2942 clientid_t
*clientid
= &open
->op_clientid
;
2943 struct nfs4_client
*clp
= NULL
;
2944 unsigned int strhashval
;
2945 struct nfs4_openowner
*oo
= NULL
;
2948 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2949 return nfserr_stale_clientid
;
2951 * In case we need it later, after we've already created the
2952 * file and don't want to risk a further failure:
2954 open
->op_file
= nfsd4_alloc_file();
2955 if (open
->op_file
== NULL
)
2956 return nfserr_jukebox
;
2958 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2959 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2960 open
->op_openowner
= oo
;
2962 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2965 return nfserr_expired
;
2968 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2969 /* Replace unconfirmed owners without checking for replay. */
2970 clp
= oo
->oo_owner
.so_client
;
2971 release_openowner(oo
);
2972 open
->op_openowner
= NULL
;
2975 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2978 clp
= oo
->oo_owner
.so_client
;
2981 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2983 return nfserr_jukebox
;
2984 open
->op_openowner
= oo
;
2986 open
->op_stp
= nfs4_alloc_stateid(clp
);
2988 return nfserr_jukebox
;
2992 static inline __be32
2993 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2995 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2996 return nfserr_openmode
;
3001 static int share_access_to_flags(u32 share_access
)
3003 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
3006 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
3008 struct nfs4_stid
*ret
;
3010 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
3013 return delegstateid(ret
);
3016 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
3018 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
3019 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
3023 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
3024 struct nfs4_delegation
**dp
)
3027 __be32 status
= nfserr_bad_stateid
;
3029 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
3032 flags
= share_access_to_flags(open
->op_share_access
);
3033 status
= nfs4_check_delegmode(*dp
, flags
);
3037 if (!nfsd4_is_deleg_cur(open
))
3041 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3046 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
3048 struct nfs4_ol_stateid
*local
;
3049 struct nfs4_openowner
*oo
= open
->op_openowner
;
3051 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
3052 /* ignore lock owners */
3053 if (local
->st_stateowner
->so_is_open_owner
== 0)
3055 /* remember if we have seen this open owner */
3056 if (local
->st_stateowner
== &oo
->oo_owner
)
3058 /* check for conflicting share reservations */
3059 if (!test_share(local
, open
))
3060 return nfserr_share_denied
;
3065 static inline int nfs4_access_to_access(u32 nfs4_access
)
3069 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
3070 flags
|= NFSD_MAY_READ
;
3071 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
3072 flags
|= NFSD_MAY_WRITE
;
3076 static inline __be32
3077 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
3078 struct nfsd4_open
*open
)
3080 struct iattr iattr
= {
3081 .ia_valid
= ATTR_SIZE
,
3084 if (!open
->op_truncate
)
3086 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
3087 return nfserr_inval
;
3088 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3091 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
3092 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
3095 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
3096 int access
= nfs4_access_to_access(open
->op_share_access
);
3098 if (!fp
->fi_fds
[oflag
]) {
3099 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
3100 &fp
->fi_fds
[oflag
]);
3104 nfs4_file_get_access(fp
, oflag
);
3106 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3108 goto out_put_access
;
3113 nfs4_file_put_access(fp
, oflag
);
3119 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
)
3121 u32 op_share_access
= open
->op_share_access
;
3124 if (!test_access(op_share_access
, stp
))
3125 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
3127 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3132 /* remember the open */
3133 set_access(op_share_access
, stp
);
3134 set_deny(open
->op_share_deny
, stp
);
3140 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3142 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3145 /* Should we give out recallable state?: */
3146 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3148 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3151 * In the sessions case, since we don't have to establish a
3152 * separate connection for callbacks, we assume it's OK
3153 * until we hear otherwise:
3155 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3158 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3160 struct file_lock
*fl
;
3162 fl
= locks_alloc_lock();
3165 locks_init_lock(fl
);
3166 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3167 fl
->fl_flags
= FL_DELEG
;
3168 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3169 fl
->fl_end
= OFFSET_MAX
;
3170 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3171 fl
->fl_pid
= current
->tgid
;
3175 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3177 struct nfs4_file
*fp
= dp
->dl_file
;
3178 struct file_lock
*fl
;
3181 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3184 fl
->fl_file
= find_readable_file(fp
);
3185 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3189 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3190 atomic_set(&fp
->fi_delegees
, 1);
3191 spin_lock(&state_lock
);
3192 hash_delegation_locked(dp
, fp
);
3193 spin_unlock(&state_lock
);
3196 locks_free_lock(fl
);
3200 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
3202 if (fp
->fi_had_conflict
)
3207 return nfs4_setlease(dp
);
3208 spin_lock(&state_lock
);
3209 atomic_inc(&fp
->fi_delegees
);
3210 if (fp
->fi_had_conflict
) {
3211 spin_unlock(&state_lock
);
3214 hash_delegation_locked(dp
, fp
);
3215 spin_unlock(&state_lock
);
3219 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3221 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3222 if (status
== -EAGAIN
)
3223 open
->op_why_no_deleg
= WND4_CONTENTION
;
3225 open
->op_why_no_deleg
= WND4_RESOURCE
;
3226 switch (open
->op_deleg_want
) {
3227 case NFS4_SHARE_WANT_READ_DELEG
:
3228 case NFS4_SHARE_WANT_WRITE_DELEG
:
3229 case NFS4_SHARE_WANT_ANY_DELEG
:
3231 case NFS4_SHARE_WANT_CANCEL
:
3232 open
->op_why_no_deleg
= WND4_CANCELLED
;
3234 case NFS4_SHARE_WANT_NO_DELEG
:
3241 * Attempt to hand out a delegation.
3243 * Note we don't support write delegations, and won't until the vfs has
3244 * proper support for them.
3247 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3248 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3250 struct nfs4_delegation
*dp
;
3251 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3255 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3256 open
->op_recall
= 0;
3257 switch (open
->op_claim_type
) {
3258 case NFS4_OPEN_CLAIM_PREVIOUS
:
3260 open
->op_recall
= 1;
3261 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3264 case NFS4_OPEN_CLAIM_NULL
:
3265 case NFS4_OPEN_CLAIM_FH
:
3267 * Let's not give out any delegations till everyone's
3268 * had the chance to reclaim theirs....
3270 if (locks_in_grace(net
))
3272 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3275 * Also, if the file was opened for write or
3276 * create, there's a good chance the client's
3277 * about to write to it, resulting in an
3278 * immediate recall (since we don't support
3279 * write delegations):
3281 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3283 if (open
->op_create
== NFS4_OPEN_CREATE
)
3289 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3292 status
= nfs4_set_delegation(dp
, stp
->st_file
);
3296 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3298 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3299 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3300 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3303 destroy_delegation(dp
);
3305 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3306 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3307 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3308 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3309 open
->op_recall
= 1;
3312 /* 4.1 client asking for a delegation? */
3313 if (open
->op_deleg_want
)
3314 nfsd4_open_deleg_none_ext(open
, status
);
3318 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3319 struct nfs4_delegation
*dp
)
3321 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3322 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3323 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3324 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3325 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3326 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3327 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3328 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3330 /* Otherwise the client must be confused wanting a delegation
3331 * it already has, therefore we don't return
3332 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3337 * called with nfs4_lock_state() held.
3340 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3342 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3343 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3344 struct nfs4_file
*fp
= NULL
;
3345 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3346 struct nfs4_ol_stateid
*stp
= NULL
;
3347 struct nfs4_delegation
*dp
= NULL
;
3351 * Lookup file; if found, lookup stateid and check open request,
3352 * and check for delegations in the process of being recalled.
3353 * If not found, create the nfs4_file struct
3355 fp
= find_or_add_file(ino
, open
->op_file
);
3356 if (fp
!= open
->op_file
) {
3357 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3359 status
= nfs4_check_deleg(cl
, open
, &dp
);
3363 open
->op_file
= NULL
;
3364 status
= nfserr_bad_stateid
;
3365 if (nfsd4_is_deleg_cur(open
))
3367 status
= nfserr_jukebox
;
3371 * OPEN the file, or upgrade an existing OPEN.
3372 * If truncate fails, the OPEN fails.
3375 /* Stateid was found, this is an OPEN upgrade */
3376 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3380 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3384 open
->op_stp
= NULL
;
3385 init_open_stateid(stp
, fp
, open
);
3387 update_stateid(&stp
->st_stid
.sc_stateid
);
3388 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3390 if (nfsd4_has_session(&resp
->cstate
)) {
3391 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3393 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3394 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3395 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3401 * Attempt to hand out a delegation. No error return, because the
3402 * OPEN succeeds even if we fail.
3404 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3408 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3409 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3411 /* 4.1 client trying to upgrade/downgrade delegation? */
3412 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3413 open
->op_deleg_want
)
3414 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3418 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3419 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3421 * To finish the open response, we just need to set the rflags.
3423 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3424 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3425 !nfsd4_has_session(&resp
->cstate
))
3426 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3431 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3433 if (open
->op_openowner
) {
3434 struct nfs4_openowner
*oo
= open
->op_openowner
;
3436 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3437 list_del_init(&oo
->oo_close_lru
);
3438 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3440 release_openowner(oo
);
3441 open
->op_openowner
= NULL
;
3443 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3447 nfsd4_free_file(open
->op_file
);
3449 free_generic_stateid(open
->op_stp
);
3452 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3454 struct nfs4_client
*found
;
3456 if (STALE_CLIENTID(clid
, nn
))
3457 return nfserr_stale_clientid
;
3458 found
= find_confirmed_client(clid
, session
, nn
);
3461 return found
? nfs_ok
: nfserr_expired
;
3465 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3468 struct nfs4_client
*clp
;
3470 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3473 dprintk("process_renew(%08x/%08x): starting\n",
3474 clid
->cl_boot
, clid
->cl_id
);
3475 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3478 status
= nfserr_cb_path_down
;
3479 if (!list_empty(&clp
->cl_delegations
)
3480 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3484 nfs4_unlock_state();
3489 nfsd4_end_grace(struct nfsd_net
*nn
)
3491 /* do nothing if grace period already ended */
3492 if (nn
->grace_ended
)
3495 dprintk("NFSD: end of grace period\n");
3496 nn
->grace_ended
= true;
3497 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3498 locks_end_grace(&nn
->nfsd4_manager
);
3500 * Now that every NFSv4 client has had the chance to recover and
3501 * to see the (possibly new, possibly shorter) lease time, we
3502 * can safely set the next grace time to the current lease time:
3504 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3508 nfs4_laundromat(struct nfsd_net
*nn
)
3510 struct nfs4_client
*clp
;
3511 struct nfs4_openowner
*oo
;
3512 struct nfs4_delegation
*dp
;
3513 struct list_head
*pos
, *next
, reaplist
;
3514 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3515 time_t t
, new_timeo
= nn
->nfsd4_lease
;
3519 dprintk("NFSD: laundromat service - starting\n");
3520 nfsd4_end_grace(nn
);
3521 INIT_LIST_HEAD(&reaplist
);
3522 spin_lock(&nn
->client_lock
);
3523 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3524 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3525 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3526 t
= clp
->cl_time
- cutoff
;
3527 new_timeo
= min(new_timeo
, t
);
3530 if (mark_client_expired_locked(clp
)) {
3531 dprintk("NFSD: client in use (clientid %08x)\n",
3532 clp
->cl_clientid
.cl_id
);
3535 list_move(&clp
->cl_lru
, &reaplist
);
3537 spin_unlock(&nn
->client_lock
);
3538 list_for_each_safe(pos
, next
, &reaplist
) {
3539 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3540 dprintk("NFSD: purging unused client (clientid %08x)\n",
3541 clp
->cl_clientid
.cl_id
);
3544 spin_lock(&state_lock
);
3545 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3546 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3547 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3549 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3550 t
= dp
->dl_time
- cutoff
;
3551 new_timeo
= min(new_timeo
, t
);
3554 list_move(&dp
->dl_recall_lru
, &reaplist
);
3556 spin_unlock(&state_lock
);
3557 list_for_each_safe(pos
, next
, &reaplist
) {
3558 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3559 revoke_delegation(dp
);
3561 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3562 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3563 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3564 t
= oo
->oo_time
- cutoff
;
3565 new_timeo
= min(new_timeo
, t
);
3568 release_openowner(oo
);
3570 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
3571 nfs4_unlock_state();
3575 static struct workqueue_struct
*laundry_wq
;
3576 static void laundromat_main(struct work_struct
*);
3579 laundromat_main(struct work_struct
*laundry
)
3582 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3584 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3587 t
= nfs4_laundromat(nn
);
3588 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3589 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3592 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3594 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3595 return nfserr_bad_stateid
;
3600 access_permit_read(struct nfs4_ol_stateid
*stp
)
3602 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3603 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3604 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3608 access_permit_write(struct nfs4_ol_stateid
*stp
)
3610 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3611 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3615 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3617 __be32 status
= nfserr_openmode
;
3619 /* For lock stateid's, we test the parent open, not the lock: */
3620 if (stp
->st_openstp
)
3621 stp
= stp
->st_openstp
;
3622 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3624 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3631 static inline __be32
3632 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3634 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3636 else if (locks_in_grace(net
)) {
3637 /* Answer in remaining cases depends on existence of
3638 * conflicting state; so we must wait out the grace period. */
3639 return nfserr_grace
;
3640 } else if (flags
& WR_STATE
)
3641 return nfs4_share_conflict(current_fh
,
3642 NFS4_SHARE_DENY_WRITE
);
3643 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3644 return nfs4_share_conflict(current_fh
,
3645 NFS4_SHARE_DENY_READ
);
3649 * Allow READ/WRITE during grace period on recovered state only for files
3650 * that are not able to provide mandatory locking.
3653 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3655 return locks_in_grace(net
) && mandatory_lock(inode
);
3658 /* Returns true iff a is later than b: */
3659 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3661 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3664 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3667 * When sessions are used the stateid generation number is ignored
3670 if (has_session
&& in
->si_generation
== 0)
3673 if (in
->si_generation
== ref
->si_generation
)
3676 /* If the client sends us a stateid from the future, it's buggy: */
3677 if (stateid_generation_after(in
, ref
))
3678 return nfserr_bad_stateid
;
3680 * However, we could see a stateid from the past, even from a
3681 * non-buggy client. For example, if the client sends a lock
3682 * while some IO is outstanding, the lock may bump si_generation
3683 * while the IO is still in flight. The client could avoid that
3684 * situation by waiting for responses on all the IO requests,
3685 * but better performance may result in retrying IO that
3686 * receives an old_stateid error if requests are rarely
3687 * reordered in flight:
3689 return nfserr_old_stateid
;
3692 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3694 struct nfs4_stid
*s
;
3695 struct nfs4_ol_stateid
*ols
;
3698 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3699 return nfserr_bad_stateid
;
3700 /* Client debugging aid. */
3701 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3702 char addr_str
[INET6_ADDRSTRLEN
];
3703 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3705 pr_warn_ratelimited("NFSD: client %s testing state ID "
3706 "with incorrect client ID\n", addr_str
);
3707 return nfserr_bad_stateid
;
3709 s
= find_stateid(cl
, stateid
);
3711 return nfserr_bad_stateid
;
3712 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3715 switch (s
->sc_type
) {
3716 case NFS4_DELEG_STID
:
3718 case NFS4_REVOKED_DELEG_STID
:
3719 return nfserr_deleg_revoked
;
3720 case NFS4_OPEN_STID
:
3721 case NFS4_LOCK_STID
:
3722 ols
= openlockstateid(s
);
3723 if (ols
->st_stateowner
->so_is_open_owner
3724 && !(openowner(ols
->st_stateowner
)->oo_flags
3725 & NFS4_OO_CONFIRMED
))
3726 return nfserr_bad_stateid
;
3729 printk("unknown stateid type %x\n", s
->sc_type
);
3730 case NFS4_CLOSED_STID
:
3731 return nfserr_bad_stateid
;
3735 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3736 struct nfs4_stid
**s
, bool sessions
,
3737 struct nfsd_net
*nn
)
3739 struct nfs4_client
*cl
;
3742 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3743 return nfserr_bad_stateid
;
3744 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3746 if (status
== nfserr_stale_clientid
) {
3748 return nfserr_bad_stateid
;
3749 return nfserr_stale_stateid
;
3753 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3755 return nfserr_bad_stateid
;
3760 * Checks for stateid operations
3763 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3764 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3766 struct nfs4_stid
*s
;
3767 struct nfs4_ol_stateid
*stp
= NULL
;
3768 struct nfs4_delegation
*dp
= NULL
;
3769 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3770 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3771 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3772 struct file
*file
= NULL
;
3778 if (grace_disallows_io(net
, ino
))
3779 return nfserr_grace
;
3781 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3782 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3786 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3787 &s
, cstate
->minorversion
, nn
);
3790 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3793 switch (s
->sc_type
) {
3794 case NFS4_DELEG_STID
:
3795 dp
= delegstateid(s
);
3796 status
= nfs4_check_delegmode(dp
, flags
);
3800 file
= dp
->dl_file
->fi_deleg_file
;
3803 status
= nfserr_serverfault
;
3808 case NFS4_OPEN_STID
:
3809 case NFS4_LOCK_STID
:
3810 stp
= openlockstateid(s
);
3811 status
= nfs4_check_fh(current_fh
, stp
);
3814 if (stp
->st_stateowner
->so_is_open_owner
3815 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3817 status
= nfs4_check_openmode(stp
, flags
);
3821 if (flags
& RD_STATE
)
3822 file
= find_readable_file(stp
->st_file
);
3824 file
= find_writeable_file(stp
->st_file
);
3828 status
= nfserr_bad_stateid
;
3833 *filpp
= get_file(file
);
3835 nfs4_unlock_state();
3840 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3842 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
3844 if (check_for_locks(stp
->st_file
, lo
))
3845 return nfserr_locks_held
;
3847 * Currently there's a 1-1 lock stateid<->lockowner
3848 * correspondance, and we have to delete the lockowner when we
3849 * delete the lock stateid:
3851 release_lockowner(lo
);
3856 * Test if the stateid is valid
3859 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3860 struct nfsd4_test_stateid
*test_stateid
)
3862 struct nfsd4_test_stateid_id
*stateid
;
3863 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3866 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3867 stateid
->ts_id_status
=
3868 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3869 nfs4_unlock_state();
3875 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3876 struct nfsd4_free_stateid
*free_stateid
)
3878 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3879 struct nfs4_stid
*s
;
3880 struct nfs4_delegation
*dp
;
3881 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3882 __be32 ret
= nfserr_bad_stateid
;
3885 s
= find_stateid(cl
, stateid
);
3888 switch (s
->sc_type
) {
3889 case NFS4_DELEG_STID
:
3890 ret
= nfserr_locks_held
;
3892 case NFS4_OPEN_STID
:
3893 case NFS4_LOCK_STID
:
3894 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3897 if (s
->sc_type
== NFS4_LOCK_STID
)
3898 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3900 ret
= nfserr_locks_held
;
3902 case NFS4_REVOKED_DELEG_STID
:
3903 dp
= delegstateid(s
);
3904 destroy_revoked_delegation(dp
);
3908 ret
= nfserr_bad_stateid
;
3911 nfs4_unlock_state();
3918 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3919 RD_STATE
: WR_STATE
;
3922 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3924 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3925 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3928 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3931 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3932 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3934 * "Closed" stateid's exist *only* to return
3935 * nfserr_replay_me from the previous step, and
3936 * revoked delegations are kept only for free_stateid.
3938 return nfserr_bad_stateid
;
3939 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3942 return nfs4_check_fh(current_fh
, stp
);
3946 * Checks for sequence id mutating operations.
3949 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3950 stateid_t
*stateid
, char typemask
,
3951 struct nfs4_ol_stateid
**stpp
,
3952 struct nfsd_net
*nn
)
3955 struct nfs4_stid
*s
;
3957 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3958 seqid
, STATEID_VAL(stateid
));
3961 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3962 cstate
->minorversion
, nn
);
3965 *stpp
= openlockstateid(s
);
3966 if (!nfsd4_has_session(cstate
))
3967 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3969 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3972 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3973 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3976 struct nfs4_openowner
*oo
;
3978 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3979 NFS4_OPEN_STID
, stpp
, nn
);
3982 oo
= openowner((*stpp
)->st_stateowner
);
3983 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3984 return nfserr_bad_stateid
;
3989 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3990 struct nfsd4_open_confirm
*oc
)
3993 struct nfs4_openowner
*oo
;
3994 struct nfs4_ol_stateid
*stp
;
3995 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3997 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3998 cstate
->current_fh
.fh_dentry
);
4000 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
4006 status
= nfs4_preprocess_seqid_op(cstate
,
4007 oc
->oc_seqid
, &oc
->oc_req_stateid
,
4008 NFS4_OPEN_STID
, &stp
, nn
);
4011 oo
= openowner(stp
->st_stateowner
);
4012 status
= nfserr_bad_stateid
;
4013 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
4015 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
4016 update_stateid(&stp
->st_stid
.sc_stateid
);
4017 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4018 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
4019 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
4021 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
4024 nfsd4_bump_seqid(cstate
, status
);
4025 if (!cstate
->replay_owner
)
4026 nfs4_unlock_state();
4030 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
4032 if (!test_access(access
, stp
))
4034 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
4035 clear_access(access
, stp
);
4038 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
4040 switch (to_access
) {
4041 case NFS4_SHARE_ACCESS_READ
:
4042 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
4043 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4045 case NFS4_SHARE_ACCESS_WRITE
:
4046 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
4047 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
4049 case NFS4_SHARE_ACCESS_BOTH
:
4057 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
4060 for (i
= 0; i
< 4; i
++) {
4061 if ((i
& deny
) != i
)
4067 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
4068 struct nfsd4_compound_state
*cstate
,
4069 struct nfsd4_open_downgrade
*od
)
4072 struct nfs4_ol_stateid
*stp
;
4073 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4075 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4076 cstate
->current_fh
.fh_dentry
);
4078 /* We don't yet support WANT bits: */
4079 if (od
->od_deleg_want
)
4080 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
4084 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
4085 &od
->od_stateid
, &stp
, nn
);
4088 status
= nfserr_inval
;
4089 if (!test_access(od
->od_share_access
, stp
)) {
4090 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
4091 stp
->st_access_bmap
, od
->od_share_access
);
4094 if (!test_deny(od
->od_share_deny
, stp
)) {
4095 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
4096 stp
->st_deny_bmap
, od
->od_share_deny
);
4099 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
4101 reset_union_bmap_deny(od
->od_share_deny
, stp
);
4103 update_stateid(&stp
->st_stid
.sc_stateid
);
4104 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4107 nfsd4_bump_seqid(cstate
, status
);
4108 if (!cstate
->replay_owner
)
4109 nfs4_unlock_state();
4113 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4115 unhash_open_stateid(s
);
4116 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4120 * nfs4_unlock_state() called after encode
4123 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4124 struct nfsd4_close
*close
)
4127 struct nfs4_openowner
*oo
;
4128 struct nfs4_ol_stateid
*stp
;
4129 struct net
*net
= SVC_NET(rqstp
);
4130 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4132 dprintk("NFSD: nfsd4_close on file %pd\n",
4133 cstate
->current_fh
.fh_dentry
);
4136 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4138 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4140 nfsd4_bump_seqid(cstate
, status
);
4143 oo
= openowner(stp
->st_stateowner
);
4144 update_stateid(&stp
->st_stid
.sc_stateid
);
4145 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4147 nfsd4_close_open_stateid(stp
);
4149 if (cstate
->minorversion
)
4150 free_generic_stateid(stp
);
4152 oo
->oo_last_closed_stid
= stp
;
4154 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
4155 if (cstate
->minorversion
)
4156 release_openowner(oo
);
4159 * In the 4.0 case we need to keep the owners around a
4160 * little while to handle CLOSE replay.
4162 move_to_close_lru(oo
, SVC_NET(rqstp
));
4166 if (!cstate
->replay_owner
)
4167 nfs4_unlock_state();
4172 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4173 struct nfsd4_delegreturn
*dr
)
4175 struct nfs4_delegation
*dp
;
4176 stateid_t
*stateid
= &dr
->dr_stateid
;
4177 struct nfs4_stid
*s
;
4179 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4181 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4185 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4186 cstate
->minorversion
, nn
);
4189 dp
= delegstateid(s
);
4190 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4194 destroy_delegation(dp
);
4196 nfs4_unlock_state();
4202 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4204 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4207 end_offset(u64 start
, u64 len
)
4212 return end
>= start
? end
: NFS4_MAX_UINT64
;
4215 /* last octet in a range */
4217 last_byte_offset(u64 start
, u64 len
)
4223 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4226 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4228 return (file_hashval(inode
) + cl_id
4229 + opaque_hashval(ownername
->data
, ownername
->len
))
4230 & LOCKOWNER_INO_HASH_MASK
;
4234 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4235 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4236 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4237 * locking, this prevents us from being completely protocol-compliant. The
4238 * real solution to this problem is to start using unsigned file offsets in
4239 * the VFS, but this is a very deep change!
4242 nfs4_transform_lock_offset(struct file_lock
*lock
)
4244 if (lock
->fl_start
< 0)
4245 lock
->fl_start
= OFFSET_MAX
;
4246 if (lock
->fl_end
< 0)
4247 lock
->fl_end
= OFFSET_MAX
;
4250 /* Hack!: For now, we're defining this just so we can use a pointer to it
4251 * as a unique cookie to identify our (NFSv4's) posix locks. */
4252 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4256 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4258 struct nfs4_lockowner
*lo
;
4260 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4261 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4262 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4263 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4264 if (!deny
->ld_owner
.data
)
4265 /* We just don't care that much */
4267 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4268 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4271 deny
->ld_owner
.len
= 0;
4272 deny
->ld_owner
.data
= NULL
;
4273 deny
->ld_clientid
.cl_boot
= 0;
4274 deny
->ld_clientid
.cl_id
= 0;
4276 deny
->ld_start
= fl
->fl_start
;
4277 deny
->ld_length
= NFS4_MAX_UINT64
;
4278 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4279 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4280 deny
->ld_type
= NFS4_READ_LT
;
4281 if (fl
->fl_type
!= F_RDLCK
)
4282 deny
->ld_type
= NFS4_WRITE_LT
;
4285 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4287 struct nfs4_ol_stateid
*lst
;
4289 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4291 if (list_empty(&lo
->lo_owner
.so_stateids
)) {
4295 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4296 struct nfs4_ol_stateid
, st_perstateowner
);
4297 return lst
->st_file
->fi_inode
== inode
;
4300 static struct nfs4_lockowner
*
4301 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4302 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4304 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4305 struct nfs4_lockowner
*lo
;
4307 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4308 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4314 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4316 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4317 unsigned int inohash
= lockowner_ino_hashval(inode
,
4318 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4319 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4321 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4322 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4323 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4327 * Alloc a lock owner structure.
4328 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4331 * strhashval = ownerstr_hashval
4334 static struct nfs4_lockowner
*
4335 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4336 struct nfs4_lockowner
*lo
;
4338 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4341 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4342 lo
->lo_owner
.so_is_open_owner
= 0;
4343 /* It is the openowner seqid that will be incremented in encode in the
4344 * case of new lockowners; so increment the lock seqid manually: */
4345 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4346 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4350 static struct nfs4_ol_stateid
*
4351 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4353 struct nfs4_ol_stateid
*stp
;
4354 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4356 stp
= nfs4_alloc_stateid(clp
);
4359 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4360 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4361 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4362 stp
->st_stateowner
= &lo
->lo_owner
;
4365 stp
->st_access_bmap
= 0;
4366 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4367 stp
->st_openstp
= open_stp
;
4372 check_lock_length(u64 offset
, u64 length
)
4374 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4375 LOFF_OVERFLOW(offset
, length
)));
4378 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4380 struct nfs4_file
*fp
= lock_stp
->st_file
;
4381 int oflag
= nfs4_access_to_omode(access
);
4383 if (test_access(access
, lock_stp
))
4385 nfs4_file_get_access(fp
, oflag
);
4386 set_access(access
, lock_stp
);
4389 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)
4391 struct nfs4_file
*fi
= ost
->st_file
;
4392 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4393 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4394 struct nfs4_lockowner
*lo
;
4395 unsigned int strhashval
;
4396 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4398 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4399 &lock
->v
.new.owner
, nn
);
4401 if (!cstate
->minorversion
)
4402 return nfserr_bad_seqid
;
4403 /* XXX: a lockowner always has exactly one stateid: */
4404 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4405 struct nfs4_ol_stateid
, st_perstateowner
);
4408 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4409 &lock
->v
.new.owner
);
4410 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4412 return nfserr_jukebox
;
4413 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4415 release_lockowner(lo
);
4416 return nfserr_jukebox
;
4426 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4427 struct nfsd4_lock
*lock
)
4429 struct nfs4_openowner
*open_sop
= NULL
;
4430 struct nfs4_lockowner
*lock_sop
= NULL
;
4431 struct nfs4_ol_stateid
*lock_stp
;
4432 struct file
*filp
= NULL
;
4433 struct file_lock
*file_lock
= NULL
;
4434 struct file_lock
*conflock
= NULL
;
4436 bool new_state
= false;
4439 struct net
*net
= SVC_NET(rqstp
);
4440 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4442 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4443 (long long) lock
->lk_offset
,
4444 (long long) lock
->lk_length
);
4446 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4447 return nfserr_inval
;
4449 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4450 S_IFREG
, NFSD_MAY_LOCK
))) {
4451 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4457 if (lock
->lk_is_new
) {
4458 struct nfs4_ol_stateid
*open_stp
= NULL
;
4460 if (nfsd4_has_session(cstate
))
4461 /* See rfc 5661 18.10.3: given clientid is ignored: */
4462 memcpy(&lock
->v
.new.clientid
,
4463 &cstate
->session
->se_client
->cl_clientid
,
4464 sizeof(clientid_t
));
4466 status
= nfserr_stale_clientid
;
4467 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4470 /* validate and update open stateid and open seqid */
4471 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4472 lock
->lk_new_open_seqid
,
4473 &lock
->lk_new_open_stateid
,
4477 open_sop
= openowner(open_stp
->st_stateowner
);
4478 status
= nfserr_bad_stateid
;
4479 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4480 &lock
->v
.new.clientid
))
4482 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4483 &lock_stp
, &new_state
);
4485 status
= nfs4_preprocess_seqid_op(cstate
,
4486 lock
->lk_old_lock_seqid
,
4487 &lock
->lk_old_lock_stateid
,
4488 NFS4_LOCK_STID
, &lock_stp
, nn
);
4491 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4493 lkflg
= setlkflg(lock
->lk_type
);
4494 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4498 status
= nfserr_grace
;
4499 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4501 status
= nfserr_no_grace
;
4502 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4505 file_lock
= locks_alloc_lock();
4507 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4508 status
= nfserr_jukebox
;
4512 locks_init_lock(file_lock
);
4513 switch (lock
->lk_type
) {
4516 filp
= find_readable_file(lock_stp
->st_file
);
4518 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4519 file_lock
->fl_type
= F_RDLCK
;
4522 case NFS4_WRITEW_LT
:
4523 filp
= find_writeable_file(lock_stp
->st_file
);
4525 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4526 file_lock
->fl_type
= F_WRLCK
;
4529 status
= nfserr_inval
;
4533 status
= nfserr_openmode
;
4536 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4537 file_lock
->fl_pid
= current
->tgid
;
4538 file_lock
->fl_file
= filp
;
4539 file_lock
->fl_flags
= FL_POSIX
;
4540 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4541 file_lock
->fl_start
= lock
->lk_offset
;
4542 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4543 nfs4_transform_lock_offset(file_lock
);
4545 conflock
= locks_alloc_lock();
4547 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4548 status
= nfserr_jukebox
;
4552 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4554 case 0: /* success! */
4555 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4556 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4560 case (EAGAIN
): /* conflock holds conflicting lock */
4561 status
= nfserr_denied
;
4562 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4563 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4566 status
= nfserr_deadlock
;
4569 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4570 status
= nfserrno(err
);
4574 if (status
&& new_state
)
4575 release_lockowner(lock_sop
);
4576 nfsd4_bump_seqid(cstate
, status
);
4577 if (!cstate
->replay_owner
)
4578 nfs4_unlock_state();
4580 locks_free_lock(file_lock
);
4582 locks_free_lock(conflock
);
4587 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4588 * so we do a temporary open here just to get an open file to pass to
4589 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4592 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4595 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4597 err
= nfserrno(vfs_test_lock(file
, lock
));
4607 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4608 struct nfsd4_lockt
*lockt
)
4610 struct inode
*inode
;
4611 struct file_lock
*file_lock
= NULL
;
4612 struct nfs4_lockowner
*lo
;
4614 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4616 if (locks_in_grace(SVC_NET(rqstp
)))
4617 return nfserr_grace
;
4619 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4620 return nfserr_inval
;
4624 if (!nfsd4_has_session(cstate
)) {
4625 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4630 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4633 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4634 file_lock
= locks_alloc_lock();
4636 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4637 status
= nfserr_jukebox
;
4640 locks_init_lock(file_lock
);
4641 switch (lockt
->lt_type
) {
4644 file_lock
->fl_type
= F_RDLCK
;
4647 case NFS4_WRITEW_LT
:
4648 file_lock
->fl_type
= F_WRLCK
;
4651 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4652 status
= nfserr_inval
;
4656 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4658 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4659 file_lock
->fl_pid
= current
->tgid
;
4660 file_lock
->fl_flags
= FL_POSIX
;
4662 file_lock
->fl_start
= lockt
->lt_offset
;
4663 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4665 nfs4_transform_lock_offset(file_lock
);
4667 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4671 if (file_lock
->fl_type
!= F_UNLCK
) {
4672 status
= nfserr_denied
;
4673 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4676 nfs4_unlock_state();
4678 locks_free_lock(file_lock
);
4683 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4684 struct nfsd4_locku
*locku
)
4686 struct nfs4_ol_stateid
*stp
;
4687 struct file
*filp
= NULL
;
4688 struct file_lock
*file_lock
= NULL
;
4691 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4693 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4694 (long long) locku
->lu_offset
,
4695 (long long) locku
->lu_length
);
4697 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4698 return nfserr_inval
;
4702 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4703 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4707 filp
= find_any_file(stp
->st_file
);
4709 status
= nfserr_lock_range
;
4712 file_lock
= locks_alloc_lock();
4714 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4715 status
= nfserr_jukebox
;
4718 locks_init_lock(file_lock
);
4719 file_lock
->fl_type
= F_UNLCK
;
4720 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4721 file_lock
->fl_pid
= current
->tgid
;
4722 file_lock
->fl_file
= filp
;
4723 file_lock
->fl_flags
= FL_POSIX
;
4724 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4725 file_lock
->fl_start
= locku
->lu_offset
;
4727 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4729 nfs4_transform_lock_offset(file_lock
);
4731 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4733 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4736 update_stateid(&stp
->st_stid
.sc_stateid
);
4737 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4740 nfsd4_bump_seqid(cstate
, status
);
4741 if (!cstate
->replay_owner
)
4742 nfs4_unlock_state();
4744 locks_free_lock(file_lock
);
4748 status
= nfserrno(err
);
4754 * 1: locks held by lockowner
4755 * 0: no locks held by lockowner
4758 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4760 struct file_lock
**flpp
;
4761 struct inode
*inode
= filp
->fi_inode
;
4764 spin_lock(&inode
->i_lock
);
4765 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4766 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4772 spin_unlock(&inode
->i_lock
);
4777 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4778 struct nfsd4_compound_state
*cstate
,
4779 struct nfsd4_release_lockowner
*rlockowner
)
4781 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4782 struct nfs4_stateowner
*sop
;
4783 struct nfs4_lockowner
*lo
;
4784 struct nfs4_ol_stateid
*stp
;
4785 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4786 struct list_head matches
;
4787 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4789 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4791 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4792 clid
->cl_boot
, clid
->cl_id
);
4796 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4800 status
= nfserr_locks_held
;
4801 INIT_LIST_HEAD(&matches
);
4803 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4804 if (sop
->so_is_open_owner
)
4806 if (!same_owner_str(sop
, owner
, clid
))
4808 list_for_each_entry(stp
, &sop
->so_stateids
,
4810 lo
= lockowner(sop
);
4811 if (check_for_locks(stp
->st_file
, lo
))
4813 list_add(&lo
->lo_list
, &matches
);
4816 /* Clients probably won't expect us to return with some (but not all)
4817 * of the lockowner state released; so don't release any until all
4818 * have been checked. */
4820 while (!list_empty(&matches
)) {
4821 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4823 /* unhash_stateowner deletes so_perclient only
4824 * for openowners. */
4825 list_del(&lo
->lo_list
);
4826 release_lockowner(lo
);
4829 nfs4_unlock_state();
4833 static inline struct nfs4_client_reclaim
*
4836 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4840 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4842 struct nfs4_client_reclaim
*crp
;
4844 crp
= nfsd4_find_reclaim_client(name
, nn
);
4845 return (crp
&& crp
->cr_clp
);
4849 * failure => all reset bets are off, nfserr_no_grace...
4851 struct nfs4_client_reclaim
*
4852 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4854 unsigned int strhashval
;
4855 struct nfs4_client_reclaim
*crp
;
4857 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4858 crp
= alloc_reclaim();
4860 strhashval
= clientstr_hashval(name
);
4861 INIT_LIST_HEAD(&crp
->cr_strhash
);
4862 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4863 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4865 nn
->reclaim_str_hashtbl_size
++;
4871 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4873 list_del(&crp
->cr_strhash
);
4875 nn
->reclaim_str_hashtbl_size
--;
4879 nfs4_release_reclaim(struct nfsd_net
*nn
)
4881 struct nfs4_client_reclaim
*crp
= NULL
;
4884 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4885 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4886 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4887 struct nfs4_client_reclaim
, cr_strhash
);
4888 nfs4_remove_reclaim_record(crp
, nn
);
4891 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4895 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4896 struct nfs4_client_reclaim
*
4897 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4899 unsigned int strhashval
;
4900 struct nfs4_client_reclaim
*crp
= NULL
;
4902 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4904 strhashval
= clientstr_hashval(recdir
);
4905 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4906 if (same_name(crp
->cr_recdir
, recdir
)) {
4914 * Called from OPEN. Look for clientid in reclaim list.
4917 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4919 struct nfs4_client
*clp
;
4921 /* find clientid in conf_id_hashtbl */
4922 clp
= find_confirmed_client(clid
, sessions
, nn
);
4924 return nfserr_reclaim_bad
;
4926 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4929 #ifdef CONFIG_NFSD_FAULT_INJECTION
4931 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4933 if (mark_client_expired(clp
))
4939 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4941 char buf
[INET6_ADDRSTRLEN
];
4942 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4943 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4947 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4950 char buf
[INET6_ADDRSTRLEN
];
4951 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4952 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4955 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4957 struct nfs4_openowner
*oop
;
4958 struct nfs4_lockowner
*lop
, *lo_next
;
4959 struct nfs4_ol_stateid
*stp
, *st_next
;
4962 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4963 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4964 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4976 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4978 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4981 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4983 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4984 nfsd_print_count(clp
, count
, "locked files");
4988 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4990 struct nfs4_openowner
*oop
, *next
;
4993 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
5003 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
5005 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
5008 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
5010 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
5011 nfsd_print_count(clp
, count
, "open files");
5015 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
5016 struct list_head
*victims
)
5018 struct nfs4_delegation
*dp
, *next
;
5021 lockdep_assert_held(&state_lock
);
5022 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
5024 list_move(&dp
->dl_recall_lru
, victims
);
5031 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
5033 struct nfs4_delegation
*dp
, *next
;
5037 spin_lock(&state_lock
);
5038 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
5039 spin_unlock(&state_lock
);
5041 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
5042 revoke_delegation(dp
);
5047 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
5049 struct nfs4_delegation
*dp
, *next
;
5053 spin_lock(&state_lock
);
5054 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
5055 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
5056 nfsd_break_one_deleg(dp
);
5057 spin_unlock(&state_lock
);
5062 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
5066 spin_lock(&state_lock
);
5067 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
5068 spin_unlock(&state_lock
);
5070 nfsd_print_count(clp
, count
, "delegations");
5074 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
5076 struct nfs4_client
*clp
, *next
;
5078 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
5080 if (!nfsd_netns_ready(nn
))
5083 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
5084 count
+= func(clp
, max
- count
);
5085 if ((max
!= 0) && (count
>= max
))
5092 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
5094 struct nfs4_client
*clp
;
5095 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
5097 if (!nfsd_netns_ready(nn
))
5100 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
5101 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5107 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5110 * Since the lifetime of a delegation isn't limited to that of an open, a
5111 * client may quite reasonably hang on to a delegation as long as it has
5112 * the inode cached. This becomes an obvious problem the first time a
5113 * client's inode cache approaches the size of the server's total memory.
5115 * For now we avoid this problem by imposing a hard limit on the number
5116 * of delegations, which varies according to the server's memory size.
5119 set_max_delegations(void)
5122 * Allow at most 4 delegations per megabyte of RAM. Quick
5123 * estimates suggest that in the worst case (where every delegation
5124 * is for a different inode), a delegation could take about 1.5K,
5125 * giving a worst case usage of about 6% of memory.
5127 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
5130 static int nfs4_state_create_net(struct net
*net
)
5132 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5135 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5136 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5137 if (!nn
->conf_id_hashtbl
)
5139 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5140 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5141 if (!nn
->unconf_id_hashtbl
)
5143 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
5144 OWNER_HASH_SIZE
, GFP_KERNEL
);
5145 if (!nn
->ownerstr_hashtbl
)
5147 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
5148 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
5149 if (!nn
->lockowner_ino_hashtbl
)
5150 goto err_lockowner_ino
;
5151 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
5152 SESSION_HASH_SIZE
, GFP_KERNEL
);
5153 if (!nn
->sessionid_hashtbl
)
5156 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5157 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5158 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5160 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5161 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5162 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5163 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5164 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5165 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5166 nn
->conf_name_tree
= RB_ROOT
;
5167 nn
->unconf_name_tree
= RB_ROOT
;
5168 INIT_LIST_HEAD(&nn
->client_lru
);
5169 INIT_LIST_HEAD(&nn
->close_lru
);
5170 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5171 spin_lock_init(&nn
->client_lock
);
5173 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5179 kfree(nn
->lockowner_ino_hashtbl
);
5181 kfree(nn
->ownerstr_hashtbl
);
5183 kfree(nn
->unconf_id_hashtbl
);
5185 kfree(nn
->conf_id_hashtbl
);
5191 nfs4_state_destroy_net(struct net
*net
)
5194 struct nfs4_client
*clp
= NULL
;
5195 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5197 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5198 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5199 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5200 destroy_client(clp
);
5204 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5205 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
5206 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5207 destroy_client(clp
);
5211 kfree(nn
->sessionid_hashtbl
);
5212 kfree(nn
->lockowner_ino_hashtbl
);
5213 kfree(nn
->ownerstr_hashtbl
);
5214 kfree(nn
->unconf_id_hashtbl
);
5215 kfree(nn
->conf_id_hashtbl
);
5220 nfs4_state_start_net(struct net
*net
)
5222 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5225 ret
= nfs4_state_create_net(net
);
5228 nfsd4_client_tracking_init(net
);
5229 nn
->boot_time
= get_seconds();
5230 locks_start_grace(net
, &nn
->nfsd4_manager
);
5231 nn
->grace_ended
= false;
5232 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5233 nn
->nfsd4_grace
, net
);
5234 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5238 /* initialization to perform when the nfsd service is started: */
5241 nfs4_state_start(void)
5245 ret
= set_callback_cred();
5248 laundry_wq
= create_singlethread_workqueue("nfsd4");
5249 if (laundry_wq
== NULL
) {
5253 ret
= nfsd4_create_callback_queue();
5255 goto out_free_laundry
;
5257 set_max_delegations();
5262 destroy_workqueue(laundry_wq
);
5268 nfs4_state_shutdown_net(struct net
*net
)
5270 struct nfs4_delegation
*dp
= NULL
;
5271 struct list_head
*pos
, *next
, reaplist
;
5272 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5274 cancel_delayed_work_sync(&nn
->laundromat_work
);
5275 locks_end_grace(&nn
->nfsd4_manager
);
5278 INIT_LIST_HEAD(&reaplist
);
5279 spin_lock(&state_lock
);
5280 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5281 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5282 list_move(&dp
->dl_recall_lru
, &reaplist
);
5284 spin_unlock(&state_lock
);
5285 list_for_each_safe(pos
, next
, &reaplist
) {
5286 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5287 destroy_delegation(dp
);
5290 nfsd4_client_tracking_exit(net
);
5291 nfs4_state_destroy_net(net
);
5292 nfs4_unlock_state();
5296 nfs4_state_shutdown(void)
5298 destroy_workqueue(laundry_wq
);
5299 nfsd4_destroy_callback_queue();
5303 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5305 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5306 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5310 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5312 if (cstate
->minorversion
) {
5313 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5314 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5319 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5321 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5325 * functions to set current state id
5328 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5330 put_stateid(cstate
, &odp
->od_stateid
);
5334 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5336 put_stateid(cstate
, &open
->op_stateid
);
5340 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5342 put_stateid(cstate
, &close
->cl_stateid
);
5346 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5348 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5352 * functions to consume current state id
5356 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5358 get_stateid(cstate
, &odp
->od_stateid
);
5362 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5364 get_stateid(cstate
, &drp
->dr_stateid
);
5368 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5370 get_stateid(cstate
, &fsp
->fr_stateid
);
5374 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5376 get_stateid(cstate
, &setattr
->sa_stateid
);
5380 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5382 get_stateid(cstate
, &close
->cl_stateid
);
5386 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5388 get_stateid(cstate
, &locku
->lu_stateid
);
5392 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5394 get_stateid(cstate
, &read
->rd_stateid
);
5398 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5400 get_stateid(cstate
, &write
->wr_stateid
);