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>
47 #include "current_stateid.h"
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
53 #define all_ones {{~0,~0},~0}
54 static const stateid_t one_stateid
= {
56 .si_opaque
= all_ones
,
58 static const stateid_t zero_stateid
= {
61 static const stateid_t currentstateid
= {
65 static u64 current_sessionid
= 1;
67 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
68 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
69 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
71 /* forward declarations */
72 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
76 /* Currently used for almost all code touching nfsv4 state: */
77 static DEFINE_MUTEX(client_mutex
);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(recall_lock
);
86 static struct kmem_cache
*openowner_slab
;
87 static struct kmem_cache
*lockowner_slab
;
88 static struct kmem_cache
*file_slab
;
89 static struct kmem_cache
*stateid_slab
;
90 static struct kmem_cache
*deleg_slab
;
95 mutex_lock(&client_mutex
);
98 static void free_session(struct nfsd4_session
*);
100 static bool is_session_dead(struct nfsd4_session
*ses
)
102 return ses
->se_flags
& NFS4_SESSION_DEAD
;
105 void nfsd4_put_session(struct nfsd4_session
*ses
)
107 if (atomic_dec_and_test(&ses
->se_ref
) && is_session_dead(ses
))
111 static __be32
mark_session_dead_locked(struct nfsd4_session
*ses
, int ref_held_by_me
)
113 if (atomic_read(&ses
->se_ref
) > ref_held_by_me
)
114 return nfserr_jukebox
;
115 ses
->se_flags
|= NFS4_SESSION_DEAD
;
119 static __be32
nfsd4_get_session_locked(struct nfsd4_session
*ses
)
121 if (is_session_dead(ses
))
122 return nfserr_badsession
;
123 atomic_inc(&ses
->se_ref
);
128 nfs4_unlock_state(void)
130 mutex_unlock(&client_mutex
);
133 static bool is_client_expired(struct nfs4_client
*clp
)
135 return clp
->cl_time
== 0;
138 static __be32
mark_client_expired_locked(struct nfs4_client
*clp
)
140 if (atomic_read(&clp
->cl_refcount
))
141 return nfserr_jukebox
;
146 static __be32
mark_client_expired(struct nfs4_client
*clp
)
148 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
151 spin_lock(&nn
->client_lock
);
152 ret
= mark_client_expired_locked(clp
);
153 spin_unlock(&nn
->client_lock
);
157 static __be32
get_client_locked(struct nfs4_client
*clp
)
159 if (is_client_expired(clp
))
160 return nfserr_expired
;
161 atomic_inc(&clp
->cl_refcount
);
165 /* must be called under the client_lock */
167 renew_client_locked(struct nfs4_client
*clp
)
169 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
171 if (is_client_expired(clp
)) {
173 printk("%s: client (clientid %08x/%08x) already expired\n",
175 clp
->cl_clientid
.cl_boot
,
176 clp
->cl_clientid
.cl_id
);
180 dprintk("renewing client (clientid %08x/%08x)\n",
181 clp
->cl_clientid
.cl_boot
,
182 clp
->cl_clientid
.cl_id
);
183 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
184 clp
->cl_time
= get_seconds();
188 renew_client(struct nfs4_client
*clp
)
190 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
192 spin_lock(&nn
->client_lock
);
193 renew_client_locked(clp
);
194 spin_unlock(&nn
->client_lock
);
197 static void put_client_renew_locked(struct nfs4_client
*clp
)
199 if (!atomic_dec_and_test(&clp
->cl_refcount
))
201 if (!is_client_expired(clp
))
202 renew_client_locked(clp
);
205 void put_client_renew(struct nfs4_client
*clp
)
207 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
209 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
211 if (!is_client_expired(clp
))
212 renew_client_locked(clp
);
213 spin_unlock(&nn
->client_lock
);
218 opaque_hashval(const void *ptr
, int nbytes
)
220 unsigned char *cptr
= (unsigned char *) ptr
;
230 static void nfsd4_free_file(struct nfs4_file
*f
)
232 kmem_cache_free(file_slab
, f
);
236 put_nfs4_file(struct nfs4_file
*fi
)
238 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
239 hlist_del(&fi
->fi_hash
);
240 spin_unlock(&recall_lock
);
247 get_nfs4_file(struct nfs4_file
*fi
)
249 atomic_inc(&fi
->fi_ref
);
252 static int num_delegations
;
253 unsigned long max_delegations
;
256 * Open owner state (share locks)
259 /* hash tables for lock and open owners */
260 #define OWNER_HASH_BITS 8
261 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
262 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
264 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
268 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
270 return ret
& OWNER_HASH_MASK
;
273 /* hash table for nfs4_file */
274 #define FILE_HASH_BITS 8
275 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
277 static unsigned int file_hashval(struct inode
*ino
)
279 /* XXX: why are we hashing on inode pointer, anyway? */
280 return hash_ptr(ino
, FILE_HASH_BITS
);
283 static struct hlist_head file_hashtbl
[FILE_HASH_SIZE
];
285 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
287 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
288 atomic_inc(&fp
->fi_access
[oflag
]);
291 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
293 if (oflag
== O_RDWR
) {
294 __nfs4_file_get_access(fp
, O_RDONLY
);
295 __nfs4_file_get_access(fp
, O_WRONLY
);
297 __nfs4_file_get_access(fp
, oflag
);
300 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
302 if (fp
->fi_fds
[oflag
]) {
303 fput(fp
->fi_fds
[oflag
]);
304 fp
->fi_fds
[oflag
] = NULL
;
308 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
310 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
311 nfs4_file_put_fd(fp
, oflag
);
312 if (atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
313 nfs4_file_put_fd(fp
, O_RDWR
);
317 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
319 if (oflag
== O_RDWR
) {
320 __nfs4_file_put_access(fp
, O_RDONLY
);
321 __nfs4_file_put_access(fp
, O_WRONLY
);
323 __nfs4_file_put_access(fp
, oflag
);
326 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
329 struct idr
*stateids
= &cl
->cl_stateids
;
330 struct nfs4_stid
*stid
;
333 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
337 new_id
= idr_alloc_cyclic(stateids
, stid
, 0, 0, GFP_KERNEL
);
340 stid
->sc_client
= cl
;
342 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
343 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
344 /* Will be incremented before return to client: */
345 stid
->sc_stateid
.si_generation
= 0;
348 * It shouldn't be a problem to reuse an opaque stateid value.
349 * I don't think it is for 4.1. But with 4.0 I worry that, for
350 * example, a stray write retransmission could be accepted by
351 * the server when it should have been rejected. Therefore,
352 * adopt a trick from the sctp code to attempt to maximize the
353 * amount of time until an id is reused, by ensuring they always
354 * "increase" (mod INT_MAX):
358 kmem_cache_free(slab
, stid
);
362 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
364 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
367 static struct nfs4_delegation
*
368 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
)
370 struct nfs4_delegation
*dp
;
372 dprintk("NFSD alloc_init_deleg\n");
373 if (num_delegations
> max_delegations
)
375 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
378 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
380 * delegation seqid's are never incremented. The 4.1 special
381 * meaning of seqid 0 isn't meaningful, really, but let's avoid
382 * 0 anyway just for consistency and use 1:
384 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
386 INIT_LIST_HEAD(&dp
->dl_perfile
);
387 INIT_LIST_HEAD(&dp
->dl_perclnt
);
388 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
390 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
391 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
393 atomic_set(&dp
->dl_count
, 1);
394 nfsd4_init_callback(&dp
->dl_recall
);
398 static void remove_stid(struct nfs4_stid
*s
)
400 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
402 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
405 static void nfs4_free_stid(struct kmem_cache
*slab
, struct nfs4_stid
*s
)
407 kmem_cache_free(slab
, s
);
411 nfs4_put_delegation(struct nfs4_delegation
*dp
)
413 if (atomic_dec_and_test(&dp
->dl_count
)) {
414 nfs4_free_stid(deleg_slab
, &dp
->dl_stid
);
419 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
423 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
424 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
426 fput(fp
->fi_deleg_file
);
427 fp
->fi_deleg_file
= NULL
;
431 static void unhash_stid(struct nfs4_stid
*s
)
437 hash_delegation_locked(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
439 lockdep_assert_held(&recall_lock
);
441 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
442 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
445 /* Called under the state lock. */
447 unhash_delegation(struct nfs4_delegation
*dp
)
449 spin_lock(&recall_lock
);
450 list_del_init(&dp
->dl_perclnt
);
451 list_del_init(&dp
->dl_perfile
);
452 list_del_init(&dp
->dl_recall_lru
);
453 spin_unlock(&recall_lock
);
455 nfs4_put_deleg_lease(dp
->dl_file
);
456 put_nfs4_file(dp
->dl_file
);
463 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
465 list_del_init(&dp
->dl_recall_lru
);
466 remove_stid(&dp
->dl_stid
);
467 nfs4_put_delegation(dp
);
470 static void destroy_delegation(struct nfs4_delegation
*dp
)
472 unhash_delegation(dp
);
473 remove_stid(&dp
->dl_stid
);
474 nfs4_put_delegation(dp
);
477 static void revoke_delegation(struct nfs4_delegation
*dp
)
479 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
481 if (clp
->cl_minorversion
== 0)
482 destroy_delegation(dp
);
484 unhash_delegation(dp
);
485 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
486 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
494 static unsigned int clientid_hashval(u32 id
)
496 return id
& CLIENT_HASH_MASK
;
499 static unsigned int clientstr_hashval(const char *name
)
501 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
505 * We store the NONE, READ, WRITE, and BOTH bits separately in the
506 * st_{access,deny}_bmap field of the stateid, in order to track not
507 * only what share bits are currently in force, but also what
508 * combinations of share bits previous opens have used. This allows us
509 * to enforce the recommendation of rfc 3530 14.2.19 that the server
510 * return an error if the client attempt to downgrade to a combination
511 * of share bits not explicable by closing some of its previous opens.
513 * XXX: This enforcement is actually incomplete, since we don't keep
514 * track of access/deny bit combinations; so, e.g., we allow:
516 * OPEN allow read, deny write
517 * OPEN allow both, deny none
518 * DOWNGRADE allow read, deny none
520 * which we should reject.
523 bmap_to_share_mode(unsigned long bmap
) {
525 unsigned int access
= 0;
527 for (i
= 1; i
< 4; i
++) {
528 if (test_bit(i
, &bmap
))
535 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
536 unsigned int access
, deny
;
538 access
= bmap_to_share_mode(stp
->st_access_bmap
);
539 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
540 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
545 /* set share access for a given stateid */
547 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
549 __set_bit(access
, &stp
->st_access_bmap
);
552 /* clear share access for a given stateid */
554 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
556 __clear_bit(access
, &stp
->st_access_bmap
);
559 /* test whether a given stateid has access */
561 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
563 return test_bit(access
, &stp
->st_access_bmap
);
566 /* set share deny for a given stateid */
568 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
570 __set_bit(access
, &stp
->st_deny_bmap
);
573 /* clear share deny for a given stateid */
575 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
577 __clear_bit(access
, &stp
->st_deny_bmap
);
580 /* test whether a given stateid is denying specific access */
582 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
584 return test_bit(access
, &stp
->st_deny_bmap
);
587 static int nfs4_access_to_omode(u32 access
)
589 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
590 case NFS4_SHARE_ACCESS_READ
:
592 case NFS4_SHARE_ACCESS_WRITE
:
594 case NFS4_SHARE_ACCESS_BOTH
:
601 /* release all access and file references for a given stateid */
603 release_all_access(struct nfs4_ol_stateid
*stp
)
607 for (i
= 1; i
< 4; i
++) {
608 if (test_access(i
, stp
))
609 nfs4_file_put_access(stp
->st_file
,
610 nfs4_access_to_omode(i
));
611 clear_access(i
, stp
);
615 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
617 list_del(&stp
->st_perfile
);
618 list_del(&stp
->st_perstateowner
);
621 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
623 release_all_access(stp
);
624 put_nfs4_file(stp
->st_file
);
628 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
630 remove_stid(&stp
->st_stid
);
631 nfs4_free_stid(stateid_slab
, &stp
->st_stid
);
634 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
638 unhash_generic_stateid(stp
);
639 unhash_stid(&stp
->st_stid
);
640 file
= find_any_file(stp
->st_file
);
642 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
643 close_generic_stateid(stp
);
644 free_generic_stateid(stp
);
647 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
649 struct nfs4_ol_stateid
*stp
;
651 list_del(&lo
->lo_owner
.so_strhash
);
652 list_del(&lo
->lo_perstateid
);
653 list_del(&lo
->lo_owner_ino_hash
);
654 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
655 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
656 struct nfs4_ol_stateid
, st_perstateowner
);
657 release_lock_stateid(stp
);
661 static void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
663 kfree(lo
->lo_owner
.so_owner
.data
);
664 kmem_cache_free(lockowner_slab
, lo
);
667 static void release_lockowner(struct nfs4_lockowner
*lo
)
669 unhash_lockowner(lo
);
670 nfs4_free_lockowner(lo
);
674 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
676 struct nfs4_lockowner
*lo
;
678 while (!list_empty(&open_stp
->st_lockowners
)) {
679 lo
= list_entry(open_stp
->st_lockowners
.next
,
680 struct nfs4_lockowner
, lo_perstateid
);
681 release_lockowner(lo
);
685 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
687 unhash_generic_stateid(stp
);
688 release_stateid_lockowners(stp
);
689 close_generic_stateid(stp
);
692 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
694 unhash_open_stateid(stp
);
695 free_generic_stateid(stp
);
698 static void unhash_openowner(struct nfs4_openowner
*oo
)
700 struct nfs4_ol_stateid
*stp
;
702 list_del(&oo
->oo_owner
.so_strhash
);
703 list_del(&oo
->oo_perclient
);
704 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
705 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
706 struct nfs4_ol_stateid
, st_perstateowner
);
707 release_open_stateid(stp
);
711 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
713 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
716 free_generic_stateid(s
);
717 oo
->oo_last_closed_stid
= NULL
;
721 static void nfs4_free_openowner(struct nfs4_openowner
*oo
)
723 kfree(oo
->oo_owner
.so_owner
.data
);
724 kmem_cache_free(openowner_slab
, oo
);
727 static void release_openowner(struct nfs4_openowner
*oo
)
729 unhash_openowner(oo
);
730 list_del(&oo
->oo_close_lru
);
731 release_last_closed_stateid(oo
);
732 nfs4_free_openowner(oo
);
736 hash_sessionid(struct nfs4_sessionid
*sessionid
)
738 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
740 return sid
->sequence
% SESSION_HASH_SIZE
;
745 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
747 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
748 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
752 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
758 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
759 * won't be used for replay.
761 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
763 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
765 if (nfserr
== nfserr_replay_me
)
768 if (!seqid_mutating_err(ntohl(nfserr
))) {
769 cstate
->replay_owner
= NULL
;
774 if (so
->so_is_open_owner
)
775 release_last_closed_stateid(openowner(so
));
781 gen_sessionid(struct nfsd4_session
*ses
)
783 struct nfs4_client
*clp
= ses
->se_client
;
784 struct nfsd4_sessionid
*sid
;
786 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
787 sid
->clientid
= clp
->cl_clientid
;
788 sid
->sequence
= current_sessionid
++;
793 * The protocol defines ca_maxresponssize_cached to include the size of
794 * the rpc header, but all we need to cache is the data starting after
795 * the end of the initial SEQUENCE operation--the rest we regenerate
796 * each time. Therefore we can advertise a ca_maxresponssize_cached
797 * value that is the number of bytes in our cache plus a few additional
798 * bytes. In order to stay on the safe side, and not promise more than
799 * we can cache, those additional bytes must be the minimum possible: 24
800 * bytes of rpc header (xid through accept state, with AUTH_NULL
801 * verifier), 12 for the compound header (with zero-length tag), and 44
802 * for the SEQUENCE op response:
804 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
807 free_session_slots(struct nfsd4_session
*ses
)
811 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
812 kfree(ses
->se_slots
[i
]);
816 * We don't actually need to cache the rpc and session headers, so we
817 * can allocate a little less for each slot:
819 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
823 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
826 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
827 return size
+ sizeof(struct nfsd4_slot
);
831 * XXX: If we run out of reserved DRC memory we could (up to a point)
832 * re-negotiate active sessions and reduce their slot usage to make
833 * room for new connections. For now we just fail the create session.
835 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
837 u32 slotsize
= slot_bytes(ca
);
838 u32 num
= ca
->maxreqs
;
841 spin_lock(&nfsd_drc_lock
);
842 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
843 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
844 num
= min_t(int, num
, avail
/ slotsize
);
845 nfsd_drc_mem_used
+= num
* slotsize
;
846 spin_unlock(&nfsd_drc_lock
);
851 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
853 int slotsize
= slot_bytes(ca
);
855 spin_lock(&nfsd_drc_lock
);
856 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
857 spin_unlock(&nfsd_drc_lock
);
860 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
861 struct nfsd4_channel_attrs
*battrs
)
863 int numslots
= fattrs
->maxreqs
;
864 int slotsize
= slot_bytes(fattrs
);
865 struct nfsd4_session
*new;
868 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
869 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
870 mem
= numslots
* sizeof(struct nfsd4_slot
*);
872 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
875 /* allocate each struct nfsd4_slot and data cache in one piece */
876 for (i
= 0; i
< numslots
; i
++) {
877 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
878 if (!new->se_slots
[i
])
882 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
883 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
888 kfree(new->se_slots
[i
]);
893 static void free_conn(struct nfsd4_conn
*c
)
895 svc_xprt_put(c
->cn_xprt
);
899 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
901 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
902 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
904 spin_lock(&clp
->cl_lock
);
905 if (!list_empty(&c
->cn_persession
)) {
906 list_del(&c
->cn_persession
);
909 nfsd4_probe_callback(clp
);
910 spin_unlock(&clp
->cl_lock
);
913 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
915 struct nfsd4_conn
*conn
;
917 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
920 svc_xprt_get(rqstp
->rq_xprt
);
921 conn
->cn_xprt
= rqstp
->rq_xprt
;
922 conn
->cn_flags
= flags
;
923 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
927 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
929 conn
->cn_session
= ses
;
930 list_add(&conn
->cn_persession
, &ses
->se_conns
);
933 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
935 struct nfs4_client
*clp
= ses
->se_client
;
937 spin_lock(&clp
->cl_lock
);
938 __nfsd4_hash_conn(conn
, ses
);
939 spin_unlock(&clp
->cl_lock
);
942 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
944 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
945 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
948 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
952 nfsd4_hash_conn(conn
, ses
);
953 ret
= nfsd4_register_conn(conn
);
955 /* oops; xprt is already down: */
956 nfsd4_conn_lost(&conn
->cn_xpt_user
);
957 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
958 /* callback channel may be back up */
959 nfsd4_probe_callback(ses
->se_client
);
963 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
965 u32 dir
= NFS4_CDFC4_FORE
;
967 if (cses
->flags
& SESSION4_BACK_CHAN
)
968 dir
|= NFS4_CDFC4_BACK
;
969 return alloc_conn(rqstp
, dir
);
972 /* must be called under client_lock */
973 static void nfsd4_del_conns(struct nfsd4_session
*s
)
975 struct nfs4_client
*clp
= s
->se_client
;
976 struct nfsd4_conn
*c
;
978 spin_lock(&clp
->cl_lock
);
979 while (!list_empty(&s
->se_conns
)) {
980 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
981 list_del_init(&c
->cn_persession
);
982 spin_unlock(&clp
->cl_lock
);
984 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
987 spin_lock(&clp
->cl_lock
);
989 spin_unlock(&clp
->cl_lock
);
992 static void __free_session(struct nfsd4_session
*ses
)
994 free_session_slots(ses
);
998 static void free_session(struct nfsd4_session
*ses
)
1000 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
1002 lockdep_assert_held(&nn
->client_lock
);
1003 nfsd4_del_conns(ses
);
1004 nfsd4_put_drc_mem(&ses
->se_fchannel
);
1005 __free_session(ses
);
1008 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
1011 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1013 new->se_client
= clp
;
1016 INIT_LIST_HEAD(&new->se_conns
);
1018 new->se_cb_seq_nr
= 1;
1019 new->se_flags
= cses
->flags
;
1020 new->se_cb_prog
= cses
->callback_prog
;
1021 new->se_cb_sec
= cses
->cb_sec
;
1022 atomic_set(&new->se_ref
, 0);
1023 idx
= hash_sessionid(&new->se_sessionid
);
1024 spin_lock(&nn
->client_lock
);
1025 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1026 spin_lock(&clp
->cl_lock
);
1027 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1028 spin_unlock(&clp
->cl_lock
);
1029 spin_unlock(&nn
->client_lock
);
1031 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1032 struct sockaddr
*sa
= svc_addr(rqstp
);
1034 * This is a little silly; with sessions there's no real
1035 * use for the callback address. Use the peer address
1036 * as a reasonable default for now, but consider fixing
1037 * the rpc client not to require an address in the
1040 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1041 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1045 /* caller must hold client_lock */
1046 static struct nfsd4_session
*
1047 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1049 struct nfsd4_session
*elem
;
1051 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1053 dump_sessionid(__func__
, sessionid
);
1054 idx
= hash_sessionid(sessionid
);
1055 /* Search in the appropriate list */
1056 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1057 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1058 NFS4_MAX_SESSIONID_LEN
)) {
1063 dprintk("%s: session not found\n", __func__
);
1067 /* caller must hold client_lock */
1069 unhash_session(struct nfsd4_session
*ses
)
1071 list_del(&ses
->se_hash
);
1072 spin_lock(&ses
->se_client
->cl_lock
);
1073 list_del(&ses
->se_perclnt
);
1074 spin_unlock(&ses
->se_client
->cl_lock
);
1077 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1079 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1081 if (clid
->cl_boot
== nn
->boot_time
)
1083 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1084 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1089 * XXX Should we use a slab cache ?
1090 * This type of memory management is somewhat inefficient, but we use it
1091 * anyway since SETCLIENTID is not a common operation.
1093 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1095 struct nfs4_client
*clp
;
1097 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1100 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1101 if (clp
->cl_name
.data
== NULL
) {
1105 clp
->cl_name
.len
= name
.len
;
1106 INIT_LIST_HEAD(&clp
->cl_sessions
);
1107 idr_init(&clp
->cl_stateids
);
1108 atomic_set(&clp
->cl_refcount
, 0);
1109 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1110 INIT_LIST_HEAD(&clp
->cl_idhash
);
1111 INIT_LIST_HEAD(&clp
->cl_openowners
);
1112 INIT_LIST_HEAD(&clp
->cl_delegations
);
1113 INIT_LIST_HEAD(&clp
->cl_lru
);
1114 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1115 INIT_LIST_HEAD(&clp
->cl_revoked
);
1116 spin_lock_init(&clp
->cl_lock
);
1117 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1122 free_client(struct nfs4_client
*clp
)
1124 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1126 lockdep_assert_held(&nn
->client_lock
);
1127 while (!list_empty(&clp
->cl_sessions
)) {
1128 struct nfsd4_session
*ses
;
1129 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1131 list_del(&ses
->se_perclnt
);
1132 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1135 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1136 free_svc_cred(&clp
->cl_cred
);
1137 kfree(clp
->cl_name
.data
);
1138 idr_destroy(&clp
->cl_stateids
);
1142 /* must be called under the client_lock */
1144 unhash_client_locked(struct nfs4_client
*clp
)
1146 struct nfsd4_session
*ses
;
1148 list_del(&clp
->cl_lru
);
1149 spin_lock(&clp
->cl_lock
);
1150 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1151 list_del_init(&ses
->se_hash
);
1152 spin_unlock(&clp
->cl_lock
);
1156 destroy_client(struct nfs4_client
*clp
)
1158 struct nfs4_openowner
*oo
;
1159 struct nfs4_delegation
*dp
;
1160 struct list_head reaplist
;
1161 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1163 INIT_LIST_HEAD(&reaplist
);
1164 spin_lock(&recall_lock
);
1165 while (!list_empty(&clp
->cl_delegations
)) {
1166 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1167 list_del_init(&dp
->dl_perclnt
);
1168 list_move(&dp
->dl_recall_lru
, &reaplist
);
1170 spin_unlock(&recall_lock
);
1171 while (!list_empty(&reaplist
)) {
1172 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1173 destroy_delegation(dp
);
1175 list_splice_init(&clp
->cl_revoked
, &reaplist
);
1176 while (!list_empty(&reaplist
)) {
1177 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1178 destroy_revoked_delegation(dp
);
1180 while (!list_empty(&clp
->cl_openowners
)) {
1181 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1182 release_openowner(oo
);
1184 nfsd4_shutdown_callback(clp
);
1185 if (clp
->cl_cb_conn
.cb_xprt
)
1186 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1187 list_del(&clp
->cl_idhash
);
1188 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1189 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1191 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1192 spin_lock(&nn
->client_lock
);
1193 unhash_client_locked(clp
);
1194 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1196 spin_unlock(&nn
->client_lock
);
1199 static void expire_client(struct nfs4_client
*clp
)
1201 nfsd4_client_record_remove(clp
);
1202 destroy_client(clp
);
1205 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1207 memcpy(target
->cl_verifier
.data
, source
->data
,
1208 sizeof(target
->cl_verifier
.data
));
1211 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1213 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1214 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1217 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1219 if (source
->cr_principal
) {
1220 target
->cr_principal
=
1221 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1222 if (target
->cr_principal
== NULL
)
1225 target
->cr_principal
= NULL
;
1226 target
->cr_flavor
= source
->cr_flavor
;
1227 target
->cr_uid
= source
->cr_uid
;
1228 target
->cr_gid
= source
->cr_gid
;
1229 target
->cr_group_info
= source
->cr_group_info
;
1230 get_group_info(target
->cr_group_info
);
1231 target
->cr_gss_mech
= source
->cr_gss_mech
;
1232 if (source
->cr_gss_mech
)
1233 gss_mech_get(source
->cr_gss_mech
);
1238 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1242 res
= o1
->len
- o2
->len
;
1245 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1248 static int same_name(const char *n1
, const char *n2
)
1250 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1254 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1256 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1260 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1262 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1265 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1269 if (g1
->ngroups
!= g2
->ngroups
)
1271 for (i
=0; i
<g1
->ngroups
; i
++)
1272 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1278 * RFC 3530 language requires clid_inuse be returned when the
1279 * "principal" associated with a requests differs from that previously
1280 * used. We use uid, gid's, and gss principal string as our best
1281 * approximation. We also don't want to allow non-gss use of a client
1282 * established using gss: in theory cr_principal should catch that
1283 * change, but in practice cr_principal can be null even in the gss case
1284 * since gssd doesn't always pass down a principal string.
1286 static bool is_gss_cred(struct svc_cred
*cr
)
1288 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1289 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1294 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1296 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1297 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1298 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1299 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1301 if (cr1
->cr_principal
== cr2
->cr_principal
)
1303 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1305 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1308 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1310 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1313 if (!cr
->cr_gss_mech
)
1315 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1316 return service
== RPC_GSS_SVC_INTEGRITY
||
1317 service
== RPC_GSS_SVC_PRIVACY
;
1320 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1322 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1324 if (!cl
->cl_mach_cred
)
1326 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1328 if (!svc_rqst_integrity_protected(rqstp
))
1330 if (!cr
->cr_principal
)
1332 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1335 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1337 static u32 current_clientid
= 1;
1339 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1340 clp
->cl_clientid
.cl_id
= current_clientid
++;
1343 static void gen_confirm(struct nfs4_client
*clp
)
1348 verf
[0] = (__be32
)get_seconds();
1349 verf
[1] = (__be32
)i
++;
1350 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1353 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1355 struct nfs4_stid
*ret
;
1357 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1358 if (!ret
|| !ret
->sc_type
)
1363 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1365 struct nfs4_stid
*s
;
1367 s
= find_stateid(cl
, t
);
1370 if (typemask
& s
->sc_type
)
1375 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1376 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1378 struct nfs4_client
*clp
;
1379 struct sockaddr
*sa
= svc_addr(rqstp
);
1381 struct net
*net
= SVC_NET(rqstp
);
1382 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1384 clp
= alloc_client(name
);
1388 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1390 spin_lock(&nn
->client_lock
);
1392 spin_unlock(&nn
->client_lock
);
1395 nfsd4_init_callback(&clp
->cl_cb_null
);
1396 clp
->cl_time
= get_seconds();
1397 clear_bit(0, &clp
->cl_cb_slot_busy
);
1398 copy_verf(clp
, verf
);
1399 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1401 clp
->cl_cb_session
= NULL
;
1407 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1409 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1410 struct nfs4_client
*clp
;
1413 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1416 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1417 new = &((*new)->rb_left
);
1419 new = &((*new)->rb_right
);
1422 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1423 rb_insert_color(&new_clp
->cl_namenode
, root
);
1426 static struct nfs4_client
*
1427 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1430 struct rb_node
*node
= root
->rb_node
;
1431 struct nfs4_client
*clp
;
1434 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1435 cmp
= compare_blob(&clp
->cl_name
, name
);
1437 node
= node
->rb_left
;
1439 node
= node
->rb_right
;
1447 add_to_unconfirmed(struct nfs4_client
*clp
)
1449 unsigned int idhashval
;
1450 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1452 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1453 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1454 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1455 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1460 move_to_confirmed(struct nfs4_client
*clp
)
1462 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1463 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1465 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1466 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1467 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1468 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1469 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1473 static struct nfs4_client
*
1474 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1476 struct nfs4_client
*clp
;
1477 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1479 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1480 if (same_clid(&clp
->cl_clientid
, clid
)) {
1481 if ((bool)clp
->cl_minorversion
!= sessions
)
1490 static struct nfs4_client
*
1491 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1493 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1495 return find_client_in_id_table(tbl
, clid
, sessions
);
1498 static struct nfs4_client
*
1499 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1501 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1503 return find_client_in_id_table(tbl
, clid
, sessions
);
1506 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1508 return clp
->cl_exchange_flags
!= 0;
1511 static struct nfs4_client
*
1512 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1514 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1517 static struct nfs4_client
*
1518 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1520 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1524 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1526 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1527 struct sockaddr
*sa
= svc_addr(rqstp
);
1528 u32 scopeid
= rpc_get_scope_id(sa
);
1529 unsigned short expected_family
;
1531 /* Currently, we only support tcp and tcp6 for the callback channel */
1532 if (se
->se_callback_netid_len
== 3 &&
1533 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1534 expected_family
= AF_INET
;
1535 else if (se
->se_callback_netid_len
== 4 &&
1536 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1537 expected_family
= AF_INET6
;
1541 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1542 se
->se_callback_addr_len
,
1543 (struct sockaddr
*)&conn
->cb_addr
,
1544 sizeof(conn
->cb_addr
));
1546 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1549 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1550 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1552 conn
->cb_prog
= se
->se_callback_prog
;
1553 conn
->cb_ident
= se
->se_callback_ident
;
1554 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1557 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1558 conn
->cb_addrlen
= 0;
1559 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1560 "will not receive delegations\n",
1561 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1567 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1570 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1572 struct xdr_buf
*buf
= resp
->xdr
.buf
;
1573 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1576 dprintk("--> %s slot %p\n", __func__
, slot
);
1578 slot
->sl_opcnt
= resp
->opcnt
;
1579 slot
->sl_status
= resp
->cstate
.status
;
1581 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1582 if (nfsd4_not_cached(resp
)) {
1583 slot
->sl_datalen
= 0;
1586 base
= resp
->cstate
.data_offset
;
1587 slot
->sl_datalen
= buf
->len
- base
;
1588 if (read_bytes_from_xdr_buf(buf
, base
, slot
->sl_data
, slot
->sl_datalen
))
1589 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1594 * Encode the replay sequence operation from the slot values.
1595 * If cachethis is FALSE encode the uncached rep error on the next
1596 * operation which sets resp->p and increments resp->opcnt for
1597 * nfs4svc_encode_compoundres.
1601 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1602 struct nfsd4_compoundres
*resp
)
1604 struct nfsd4_op
*op
;
1605 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1607 /* Encode the replayed sequence operation */
1608 op
= &args
->ops
[resp
->opcnt
- 1];
1609 nfsd4_encode_operation(resp
, op
);
1611 /* Return nfserr_retry_uncached_rep in next operation. */
1612 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1613 op
= &args
->ops
[resp
->opcnt
++];
1614 op
->status
= nfserr_retry_uncached_rep
;
1615 nfsd4_encode_operation(resp
, op
);
1621 * The sequence operation is not cached because we can use the slot and
1625 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1626 struct nfsd4_sequence
*seq
)
1628 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1629 struct xdr_stream
*xdr
= &resp
->xdr
;
1633 dprintk("--> %s slot %p\n", __func__
, slot
);
1635 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1639 p
= xdr_reserve_space(xdr
, slot
->sl_datalen
);
1642 return nfserr_serverfault
;
1644 xdr_encode_opaque_fixed(p
, slot
->sl_data
, slot
->sl_datalen
);
1645 xdr_commit_encode(xdr
);
1647 resp
->opcnt
= slot
->sl_opcnt
;
1648 return slot
->sl_status
;
1652 * Set the exchange_id flags returned by the server.
1655 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1657 /* pNFS is not supported */
1658 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1660 /* Referrals are supported, Migration is not. */
1661 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1663 /* set the wire flags to return to client. */
1664 clid
->flags
= new->cl_exchange_flags
;
1667 static bool client_has_state(struct nfs4_client
*clp
)
1670 * Note clp->cl_openowners check isn't quite right: there's no
1671 * need to count owners without stateid's.
1673 * Also note we should probably be using this in 4.0 case too.
1675 return !list_empty(&clp
->cl_openowners
)
1676 || !list_empty(&clp
->cl_delegations
)
1677 || !list_empty(&clp
->cl_sessions
);
1681 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1682 struct nfsd4_compound_state
*cstate
,
1683 struct nfsd4_exchange_id
*exid
)
1685 struct nfs4_client
*unconf
, *conf
, *new;
1687 char addr_str
[INET6_ADDRSTRLEN
];
1688 nfs4_verifier verf
= exid
->verifier
;
1689 struct sockaddr
*sa
= svc_addr(rqstp
);
1690 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1691 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1693 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1694 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1695 "ip_addr=%s flags %x, spa_how %d\n",
1696 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1697 addr_str
, exid
->flags
, exid
->spa_how
);
1699 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1700 return nfserr_inval
;
1702 switch (exid
->spa_how
) {
1704 if (!svc_rqst_integrity_protected(rqstp
))
1705 return nfserr_inval
;
1708 default: /* checked by xdr code */
1711 return nfserr_encr_alg_unsupp
;
1714 /* Cases below refer to rfc 5661 section 18.35.4: */
1716 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1718 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1719 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1722 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1723 status
= nfserr_inval
;
1726 if (!mach_creds_match(conf
, rqstp
)) {
1727 status
= nfserr_wrong_cred
;
1730 if (!creds_match
) { /* case 9 */
1731 status
= nfserr_perm
;
1734 if (!verfs_match
) { /* case 8 */
1735 status
= nfserr_not_same
;
1739 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1743 if (!creds_match
) { /* case 3 */
1744 if (client_has_state(conf
)) {
1745 status
= nfserr_clid_inuse
;
1748 expire_client(conf
);
1751 if (verfs_match
) { /* case 2 */
1752 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1756 /* case 5, client reboot */
1760 if (update
) { /* case 7 */
1761 status
= nfserr_noent
;
1765 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1766 if (unconf
) /* case 4, possible retry or client restart */
1767 expire_client(unconf
);
1769 /* case 1 (normal case) */
1771 new = create_client(exid
->clname
, rqstp
, &verf
);
1773 status
= nfserr_jukebox
;
1776 new->cl_minorversion
= cstate
->minorversion
;
1777 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1780 add_to_unconfirmed(new);
1782 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1783 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1785 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1786 nfsd4_set_ex_flags(new, exid
);
1788 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1789 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1793 nfs4_unlock_state();
1798 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1800 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1803 /* The slot is in use, and no response has been sent. */
1805 if (seqid
== slot_seqid
)
1806 return nfserr_jukebox
;
1808 return nfserr_seq_misordered
;
1810 /* Note unsigned 32-bit arithmetic handles wraparound: */
1811 if (likely(seqid
== slot_seqid
+ 1))
1813 if (seqid
== slot_seqid
)
1814 return nfserr_replay_cache
;
1815 return nfserr_seq_misordered
;
1819 * Cache the create session result into the create session single DRC
1820 * slot cache by saving the xdr structure. sl_seqid has been set.
1821 * Do this for solo or embedded create session operations.
1824 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1825 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1827 slot
->sl_status
= nfserr
;
1828 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1832 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1833 struct nfsd4_clid_slot
*slot
)
1835 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1836 return slot
->sl_status
;
1839 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1840 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1841 1 + /* MIN tag is length with zero, only length */ \
1842 3 + /* version, opcount, opcode */ \
1843 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1844 /* seqid, slotID, slotID, cache */ \
1845 4 ) * sizeof(__be32))
1847 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1848 2 + /* verifier: AUTH_NULL, length 0 */\
1850 1 + /* MIN tag is length with zero, only length */ \
1851 3 + /* opcount, opcode, opstatus*/ \
1852 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1853 /* seqid, slotID, slotID, slotID, status */ \
1854 5 ) * sizeof(__be32))
1856 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1858 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1860 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1861 return nfserr_toosmall
;
1862 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1863 return nfserr_toosmall
;
1864 ca
->headerpadsz
= 0;
1865 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1866 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1867 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1868 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1869 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1870 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1872 * Note decreasing slot size below client's request may make it
1873 * difficult for client to function correctly, whereas
1874 * decreasing the number of slots will (just?) affect
1875 * performance. When short on memory we therefore prefer to
1876 * decrease number of slots instead of their size. Clients that
1877 * request larger slots than they need will get poor results:
1879 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1881 return nfserr_jukebox
;
1886 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
1887 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
1888 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
1889 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
1891 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1893 ca
->headerpadsz
= 0;
1896 * These RPC_MAX_HEADER macros are overkill, especially since we
1897 * don't even do gss on the backchannel yet. But this is still
1898 * less than 1k. Tighten up this estimate in the unlikely event
1899 * it turns out to be a problem for some client:
1901 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
1902 return nfserr_toosmall
;
1903 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
1904 return nfserr_toosmall
;
1905 ca
->maxresp_cached
= 0;
1907 return nfserr_toosmall
;
1912 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1914 switch (cbs
->flavor
) {
1920 * GSS case: the spec doesn't allow us to return this
1921 * error. But it also doesn't allow us not to support
1923 * I'd rather this fail hard than return some error the
1924 * client might think it can already handle:
1926 return nfserr_encr_alg_unsupp
;
1931 nfsd4_create_session(struct svc_rqst
*rqstp
,
1932 struct nfsd4_compound_state
*cstate
,
1933 struct nfsd4_create_session
*cr_ses
)
1935 struct sockaddr
*sa
= svc_addr(rqstp
);
1936 struct nfs4_client
*conf
, *unconf
;
1937 struct nfsd4_session
*new;
1938 struct nfsd4_conn
*conn
;
1939 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1941 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1943 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1944 return nfserr_inval
;
1945 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
1948 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1951 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1953 goto out_release_drc_mem
;
1954 status
= nfserr_jukebox
;
1955 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
1957 goto out_release_drc_mem
;
1958 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1960 goto out_free_session
;
1963 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1964 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1965 WARN_ON_ONCE(conf
&& unconf
);
1968 status
= nfserr_wrong_cred
;
1969 if (!mach_creds_match(conf
, rqstp
))
1971 cs_slot
= &conf
->cl_cs_slot
;
1972 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1973 if (status
== nfserr_replay_cache
) {
1974 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1976 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1977 status
= nfserr_seq_misordered
;
1980 } else if (unconf
) {
1981 struct nfs4_client
*old
;
1982 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1983 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1984 status
= nfserr_clid_inuse
;
1987 status
= nfserr_wrong_cred
;
1988 if (!mach_creds_match(unconf
, rqstp
))
1990 cs_slot
= &unconf
->cl_cs_slot
;
1991 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1993 /* an unconfirmed replay returns misordered */
1994 status
= nfserr_seq_misordered
;
1997 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1999 status
= mark_client_expired(old
);
2004 move_to_confirmed(unconf
);
2007 status
= nfserr_stale_clientid
;
2012 * We do not support RDMA or persistent sessions
2014 cr_ses
->flags
&= ~SESSION4_PERSIST
;
2015 cr_ses
->flags
&= ~SESSION4_RDMA
;
2017 init_session(rqstp
, new, conf
, cr_ses
);
2018 nfsd4_init_conn(rqstp
, conn
, new);
2020 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
2021 NFS4_MAX_SESSIONID_LEN
);
2022 cs_slot
->sl_seqid
++;
2023 cr_ses
->seqid
= cs_slot
->sl_seqid
;
2025 /* cache solo and embedded create sessions under the state lock */
2026 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
2027 nfs4_unlock_state();
2030 nfs4_unlock_state();
2033 __free_session(new);
2034 out_release_drc_mem
:
2035 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2039 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2042 case NFS4_CDFC4_FORE
:
2043 case NFS4_CDFC4_BACK
:
2045 case NFS4_CDFC4_FORE_OR_BOTH
:
2046 case NFS4_CDFC4_BACK_OR_BOTH
:
2047 *dir
= NFS4_CDFC4_BOTH
;
2050 return nfserr_inval
;
2053 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2055 struct nfsd4_session
*session
= cstate
->session
;
2056 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2059 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2062 spin_lock(&nn
->client_lock
);
2063 session
->se_cb_prog
= bc
->bc_cb_program
;
2064 session
->se_cb_sec
= bc
->bc_cb_sec
;
2065 spin_unlock(&nn
->client_lock
);
2067 nfsd4_probe_callback(session
->se_client
);
2072 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2073 struct nfsd4_compound_state
*cstate
,
2074 struct nfsd4_bind_conn_to_session
*bcts
)
2077 struct nfsd4_conn
*conn
;
2078 struct nfsd4_session
*session
;
2079 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2081 if (!nfsd4_last_compound_op(rqstp
))
2082 return nfserr_not_only_op
;
2084 spin_lock(&nn
->client_lock
);
2085 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2086 spin_unlock(&nn
->client_lock
);
2087 status
= nfserr_badsession
;
2090 status
= nfserr_wrong_cred
;
2091 if (!mach_creds_match(session
->se_client
, rqstp
))
2093 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2096 conn
= alloc_conn(rqstp
, bcts
->dir
);
2097 status
= nfserr_jukebox
;
2100 nfsd4_init_conn(rqstp
, conn
, session
);
2103 nfs4_unlock_state();
2107 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2111 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2115 nfsd4_destroy_session(struct svc_rqst
*r
,
2116 struct nfsd4_compound_state
*cstate
,
2117 struct nfsd4_destroy_session
*sessionid
)
2119 struct nfsd4_session
*ses
;
2121 int ref_held_by_me
= 0;
2122 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2125 status
= nfserr_not_only_op
;
2126 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2127 if (!nfsd4_last_compound_op(r
))
2131 dump_sessionid(__func__
, &sessionid
->sessionid
);
2132 spin_lock(&nn
->client_lock
);
2133 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2134 status
= nfserr_badsession
;
2136 goto out_client_lock
;
2137 status
= nfserr_wrong_cred
;
2138 if (!mach_creds_match(ses
->se_client
, r
))
2139 goto out_client_lock
;
2140 nfsd4_get_session_locked(ses
);
2141 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2143 goto out_put_session
;
2144 unhash_session(ses
);
2145 spin_unlock(&nn
->client_lock
);
2147 nfsd4_probe_callback_sync(ses
->se_client
);
2149 spin_lock(&nn
->client_lock
);
2152 nfsd4_put_session(ses
);
2154 spin_unlock(&nn
->client_lock
);
2156 nfs4_unlock_state();
2160 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2162 struct nfsd4_conn
*c
;
2164 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2165 if (c
->cn_xprt
== xpt
) {
2172 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2174 struct nfs4_client
*clp
= ses
->se_client
;
2175 struct nfsd4_conn
*c
;
2176 __be32 status
= nfs_ok
;
2179 spin_lock(&clp
->cl_lock
);
2180 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2183 status
= nfserr_conn_not_bound_to_session
;
2184 if (clp
->cl_mach_cred
)
2186 __nfsd4_hash_conn(new, ses
);
2187 spin_unlock(&clp
->cl_lock
);
2188 ret
= nfsd4_register_conn(new);
2190 /* oops; xprt is already down: */
2191 nfsd4_conn_lost(&new->cn_xpt_user
);
2194 spin_unlock(&clp
->cl_lock
);
2199 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2201 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2203 return args
->opcnt
> session
->se_fchannel
.maxops
;
2206 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2207 struct nfsd4_session
*session
)
2209 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2211 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2215 nfsd4_sequence(struct svc_rqst
*rqstp
,
2216 struct nfsd4_compound_state
*cstate
,
2217 struct nfsd4_sequence
*seq
)
2219 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2220 struct xdr_stream
*xdr
= &resp
->xdr
;
2221 struct nfsd4_session
*session
;
2222 struct nfs4_client
*clp
;
2223 struct nfsd4_slot
*slot
;
2224 struct nfsd4_conn
*conn
;
2227 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2229 if (resp
->opcnt
!= 1)
2230 return nfserr_sequence_pos
;
2233 * Will be either used or freed by nfsd4_sequence_check_conn
2236 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2238 return nfserr_jukebox
;
2240 spin_lock(&nn
->client_lock
);
2241 status
= nfserr_badsession
;
2242 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2244 goto out_no_session
;
2245 clp
= session
->se_client
;
2246 status
= get_client_locked(clp
);
2248 goto out_no_session
;
2249 status
= nfsd4_get_session_locked(session
);
2251 goto out_put_client
;
2253 status
= nfserr_too_many_ops
;
2254 if (nfsd4_session_too_many_ops(rqstp
, session
))
2255 goto out_put_session
;
2257 status
= nfserr_req_too_big
;
2258 if (nfsd4_request_too_big(rqstp
, session
))
2259 goto out_put_session
;
2261 status
= nfserr_badslot
;
2262 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2263 goto out_put_session
;
2265 slot
= session
->se_slots
[seq
->slotid
];
2266 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2268 /* We do not negotiate the number of slots yet, so set the
2269 * maxslots to the session maxreqs which is used to encode
2270 * sr_highest_slotid and the sr_target_slot id to maxslots */
2271 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2273 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2274 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2275 if (status
== nfserr_replay_cache
) {
2276 status
= nfserr_seq_misordered
;
2277 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2278 goto out_put_session
;
2279 cstate
->slot
= slot
;
2280 cstate
->session
= session
;
2281 /* Return the cached reply status and set cstate->status
2282 * for nfsd4_proc_compound processing */
2283 status
= nfsd4_replay_cache_entry(resp
, seq
);
2284 cstate
->status
= nfserr_replay_cache
;
2288 goto out_put_session
;
2290 status
= nfsd4_sequence_check_conn(conn
, session
);
2293 goto out_put_session
;
2295 buflen
= (seq
->cachethis
) ?
2296 session
->se_fchannel
.maxresp_cached
:
2297 session
->se_fchannel
.maxresp_sz
;
2298 status
= (seq
->cachethis
) ? nfserr_rep_too_big_to_cache
:
2300 if (xdr_restrict_buflen(xdr
, buflen
- rqstp
->rq_auth_slack
))
2301 goto out_put_session
;
2302 svc_reserve(rqstp
, buflen
);
2305 /* Success! bump slot seqid */
2306 slot
->sl_seqid
= seq
->seqid
;
2307 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2309 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2311 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2313 cstate
->slot
= slot
;
2314 cstate
->session
= session
;
2317 switch (clp
->cl_cb_state
) {
2319 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2321 case NFSD4_CB_FAULT
:
2322 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2325 seq
->status_flags
= 0;
2327 if (!list_empty(&clp
->cl_revoked
))
2328 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2332 spin_unlock(&nn
->client_lock
);
2335 nfsd4_put_session(session
);
2337 put_client_renew_locked(clp
);
2338 goto out_no_session
;
2342 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2344 struct nfs4_client
*conf
, *unconf
, *clp
;
2346 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2349 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2350 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2351 WARN_ON_ONCE(conf
&& unconf
);
2356 if (client_has_state(conf
)) {
2357 status
= nfserr_clientid_busy
;
2363 status
= nfserr_stale_clientid
;
2366 if (!mach_creds_match(clp
, rqstp
)) {
2367 status
= nfserr_wrong_cred
;
2372 nfs4_unlock_state();
2377 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2381 if (rc
->rca_one_fs
) {
2382 if (!cstate
->current_fh
.fh_dentry
)
2383 return nfserr_nofilehandle
;
2385 * We don't take advantage of the rca_one_fs case.
2386 * That's OK, it's optional, we can safely ignore it.
2392 status
= nfserr_complete_already
;
2393 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2394 &cstate
->session
->se_client
->cl_flags
))
2397 status
= nfserr_stale_clientid
;
2398 if (is_client_expired(cstate
->session
->se_client
))
2400 * The following error isn't really legal.
2401 * But we only get here if the client just explicitly
2402 * destroyed the client. Surely it no longer cares what
2403 * error it gets back on an operation for the dead
2409 nfsd4_client_record_create(cstate
->session
->se_client
);
2411 nfs4_unlock_state();
2416 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2417 struct nfsd4_setclientid
*setclid
)
2419 struct xdr_netobj clname
= setclid
->se_name
;
2420 nfs4_verifier clverifier
= setclid
->se_verf
;
2421 struct nfs4_client
*conf
, *unconf
, *new;
2423 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2425 /* Cases below refer to rfc 3530 section 14.2.33: */
2427 conf
= find_confirmed_client_by_name(&clname
, nn
);
2430 status
= nfserr_clid_inuse
;
2431 if (clp_used_exchangeid(conf
))
2433 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2434 char addr_str
[INET6_ADDRSTRLEN
];
2435 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2437 dprintk("NFSD: setclientid: string in use by client "
2438 "at %s\n", addr_str
);
2442 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2444 expire_client(unconf
);
2445 status
= nfserr_jukebox
;
2446 new = create_client(clname
, rqstp
, &clverifier
);
2449 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2450 /* case 1: probable callback update */
2451 copy_clid(new, conf
);
2452 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2454 new->cl_minorversion
= 0;
2455 gen_callback(new, setclid
, rqstp
);
2456 add_to_unconfirmed(new);
2457 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2458 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2459 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2462 nfs4_unlock_state();
2468 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2469 struct nfsd4_compound_state
*cstate
,
2470 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2472 struct nfs4_client
*conf
, *unconf
;
2473 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2474 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2476 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2478 if (STALE_CLIENTID(clid
, nn
))
2479 return nfserr_stale_clientid
;
2482 conf
= find_confirmed_client(clid
, false, nn
);
2483 unconf
= find_unconfirmed_client(clid
, false, nn
);
2485 * We try hard to give out unique clientid's, so if we get an
2486 * attempt to confirm the same clientid with a different cred,
2487 * there's a bug somewhere. Let's charitably assume it's our
2490 status
= nfserr_serverfault
;
2491 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2493 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2495 /* cases below refer to rfc 3530 section 14.2.34: */
2496 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2497 if (conf
&& !unconf
) /* case 2: probable retransmit */
2499 else /* case 4: client hasn't noticed we rebooted yet? */
2500 status
= nfserr_stale_clientid
;
2504 if (conf
) { /* case 1: callback update */
2505 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2506 nfsd4_probe_callback(conf
);
2507 expire_client(unconf
);
2508 } else { /* case 3: normal case; new or rebooted client */
2509 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2511 status
= mark_client_expired(conf
);
2514 expire_client(conf
);
2516 move_to_confirmed(unconf
);
2517 nfsd4_probe_callback(unconf
);
2520 nfs4_unlock_state();
2524 static struct nfs4_file
*nfsd4_alloc_file(void)
2526 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2529 /* OPEN Share state helper functions */
2530 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2532 unsigned int hashval
= file_hashval(ino
);
2534 atomic_set(&fp
->fi_ref
, 1);
2535 INIT_LIST_HEAD(&fp
->fi_stateids
);
2536 INIT_LIST_HEAD(&fp
->fi_delegations
);
2537 fp
->fi_inode
= igrab(ino
);
2538 fp
->fi_had_conflict
= false;
2539 fp
->fi_lease
= NULL
;
2540 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2541 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2542 spin_lock(&recall_lock
);
2543 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2544 spin_unlock(&recall_lock
);
2548 nfsd4_free_slabs(void)
2550 kmem_cache_destroy(openowner_slab
);
2551 kmem_cache_destroy(lockowner_slab
);
2552 kmem_cache_destroy(file_slab
);
2553 kmem_cache_destroy(stateid_slab
);
2554 kmem_cache_destroy(deleg_slab
);
2558 nfsd4_init_slabs(void)
2560 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2561 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2562 if (openowner_slab
== NULL
)
2564 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2565 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2566 if (lockowner_slab
== NULL
)
2567 goto out_free_openowner_slab
;
2568 file_slab
= kmem_cache_create("nfsd4_files",
2569 sizeof(struct nfs4_file
), 0, 0, NULL
);
2570 if (file_slab
== NULL
)
2571 goto out_free_lockowner_slab
;
2572 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2573 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2574 if (stateid_slab
== NULL
)
2575 goto out_free_file_slab
;
2576 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2577 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2578 if (deleg_slab
== NULL
)
2579 goto out_free_stateid_slab
;
2582 out_free_stateid_slab
:
2583 kmem_cache_destroy(stateid_slab
);
2585 kmem_cache_destroy(file_slab
);
2586 out_free_lockowner_slab
:
2587 kmem_cache_destroy(lockowner_slab
);
2588 out_free_openowner_slab
:
2589 kmem_cache_destroy(openowner_slab
);
2591 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2595 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2597 rp
->rp_status
= nfserr_serverfault
;
2599 rp
->rp_buf
= rp
->rp_ibuf
;
2602 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2604 struct nfs4_stateowner
*sop
;
2606 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2610 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2611 if (!sop
->so_owner
.data
) {
2612 kmem_cache_free(slab
, sop
);
2615 sop
->so_owner
.len
= owner
->len
;
2617 INIT_LIST_HEAD(&sop
->so_stateids
);
2618 sop
->so_client
= clp
;
2619 init_nfs4_replay(&sop
->so_replay
);
2623 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2625 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2627 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2628 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2631 static struct nfs4_openowner
*
2632 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2633 struct nfs4_openowner
*oo
;
2635 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2638 oo
->oo_owner
.so_is_open_owner
= 1;
2639 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2640 oo
->oo_flags
= NFS4_OO_NEW
;
2642 oo
->oo_last_closed_stid
= NULL
;
2643 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2644 hash_openowner(oo
, clp
, strhashval
);
2648 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2649 struct nfs4_openowner
*oo
= open
->op_openowner
;
2651 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2652 INIT_LIST_HEAD(&stp
->st_lockowners
);
2653 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2654 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2655 stp
->st_stateowner
= &oo
->oo_owner
;
2658 stp
->st_access_bmap
= 0;
2659 stp
->st_deny_bmap
= 0;
2660 set_access(open
->op_share_access
, stp
);
2661 set_deny(open
->op_share_deny
, stp
);
2662 stp
->st_openstp
= NULL
;
2666 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2668 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2670 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2672 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2673 oo
->oo_time
= get_seconds();
2677 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2680 return (sop
->so_owner
.len
== owner
->len
) &&
2681 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2682 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2685 static struct nfs4_openowner
*
2686 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2687 bool sessions
, struct nfsd_net
*nn
)
2689 struct nfs4_stateowner
*so
;
2690 struct nfs4_openowner
*oo
;
2691 struct nfs4_client
*clp
;
2693 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2694 if (!so
->so_is_open_owner
)
2696 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2698 clp
= oo
->oo_owner
.so_client
;
2699 if ((bool)clp
->cl_minorversion
!= sessions
)
2701 renew_client(oo
->oo_owner
.so_client
);
2708 /* search file_hashtbl[] for file */
2709 static struct nfs4_file
*
2710 find_file(struct inode
*ino
)
2712 unsigned int hashval
= file_hashval(ino
);
2713 struct nfs4_file
*fp
;
2715 spin_lock(&recall_lock
);
2716 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2717 if (fp
->fi_inode
== ino
) {
2719 spin_unlock(&recall_lock
);
2723 spin_unlock(&recall_lock
);
2728 * Called to check deny when READ with all zero stateid or
2729 * WRITE with all zero or all one stateid
2732 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2734 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2735 struct nfs4_file
*fp
;
2736 struct nfs4_ol_stateid
*stp
;
2739 fp
= find_file(ino
);
2742 ret
= nfserr_locked
;
2743 /* Search for conflicting share reservations */
2744 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2745 if (test_deny(deny_type
, stp
) ||
2746 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2755 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2757 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2758 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2760 /* We're assuming the state code never drops its reference
2761 * without first removing the lease. Since we're in this lease
2762 * callback (and since the lease code is serialized by the kernel
2763 * lock) we know the server hasn't removed the lease yet, we know
2764 * it's safe to take a reference: */
2765 atomic_inc(&dp
->dl_count
);
2767 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2769 /* Only place dl_time is set; protected by i_lock: */
2770 dp
->dl_time
= get_seconds();
2772 nfsd4_cb_recall(dp
);
2775 /* Called from break_lease() with i_lock held. */
2776 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2778 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2779 struct nfs4_delegation
*dp
;
2782 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2785 if (fp
->fi_had_conflict
) {
2786 WARN(1, "duplicate break on %p\n", fp
);
2790 * We don't want the locks code to timeout the lease for us;
2791 * we'll remove it ourself if a delegation isn't returned
2794 fl
->fl_break_time
= 0;
2796 spin_lock(&recall_lock
);
2797 fp
->fi_had_conflict
= true;
2798 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2799 nfsd_break_one_deleg(dp
);
2800 spin_unlock(&recall_lock
);
2804 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2807 return lease_modify(onlist
, arg
);
2812 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2813 .lm_break
= nfsd_break_deleg_cb
,
2814 .lm_change
= nfsd_change_deleg_cb
,
2817 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2819 if (nfsd4_has_session(cstate
))
2821 if (seqid
== so
->so_seqid
- 1)
2822 return nfserr_replay_me
;
2823 if (seqid
== so
->so_seqid
)
2825 return nfserr_bad_seqid
;
2829 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2830 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2832 clientid_t
*clientid
= &open
->op_clientid
;
2833 struct nfs4_client
*clp
= NULL
;
2834 unsigned int strhashval
;
2835 struct nfs4_openowner
*oo
= NULL
;
2838 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2839 return nfserr_stale_clientid
;
2841 * In case we need it later, after we've already created the
2842 * file and don't want to risk a further failure:
2844 open
->op_file
= nfsd4_alloc_file();
2845 if (open
->op_file
== NULL
)
2846 return nfserr_jukebox
;
2848 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2849 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2850 open
->op_openowner
= oo
;
2852 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2855 return nfserr_expired
;
2858 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2859 /* Replace unconfirmed owners without checking for replay. */
2860 clp
= oo
->oo_owner
.so_client
;
2861 release_openowner(oo
);
2862 open
->op_openowner
= NULL
;
2865 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2868 clp
= oo
->oo_owner
.so_client
;
2871 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2873 return nfserr_jukebox
;
2874 open
->op_openowner
= oo
;
2876 open
->op_stp
= nfs4_alloc_stateid(clp
);
2878 return nfserr_jukebox
;
2882 static inline __be32
2883 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2885 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2886 return nfserr_openmode
;
2891 static int share_access_to_flags(u32 share_access
)
2893 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2896 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2898 struct nfs4_stid
*ret
;
2900 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2903 return delegstateid(ret
);
2906 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2908 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2909 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2913 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2914 struct nfs4_delegation
**dp
)
2917 __be32 status
= nfserr_bad_stateid
;
2919 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2922 flags
= share_access_to_flags(open
->op_share_access
);
2923 status
= nfs4_check_delegmode(*dp
, flags
);
2927 if (!nfsd4_is_deleg_cur(open
))
2931 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2936 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2938 struct nfs4_ol_stateid
*local
;
2939 struct nfs4_openowner
*oo
= open
->op_openowner
;
2941 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2942 /* ignore lock owners */
2943 if (local
->st_stateowner
->so_is_open_owner
== 0)
2945 /* remember if we have seen this open owner */
2946 if (local
->st_stateowner
== &oo
->oo_owner
)
2948 /* check for conflicting share reservations */
2949 if (!test_share(local
, open
))
2950 return nfserr_share_denied
;
2955 static inline int nfs4_access_to_access(u32 nfs4_access
)
2959 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2960 flags
|= NFSD_MAY_READ
;
2961 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2962 flags
|= NFSD_MAY_WRITE
;
2966 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2967 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2970 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2971 int access
= nfs4_access_to_access(open
->op_share_access
);
2973 if (!fp
->fi_fds
[oflag
]) {
2974 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2975 &fp
->fi_fds
[oflag
]);
2979 nfs4_file_get_access(fp
, oflag
);
2984 static inline __be32
2985 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2986 struct nfsd4_open
*open
)
2988 struct iattr iattr
= {
2989 .ia_valid
= ATTR_SIZE
,
2992 if (!open
->op_truncate
)
2994 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2995 return nfserr_inval
;
2996 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
3000 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
)
3002 u32 op_share_access
= open
->op_share_access
;
3006 new_access
= !test_access(op_share_access
, stp
);
3008 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
3012 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
3015 int oflag
= nfs4_access_to_omode(op_share_access
);
3016 nfs4_file_put_access(fp
, oflag
);
3020 /* remember the open */
3021 set_access(op_share_access
, stp
);
3022 set_deny(open
->op_share_deny
, stp
);
3029 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3031 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3034 /* Should we give out recallable state?: */
3035 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3037 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3040 * In the sessions case, since we don't have to establish a
3041 * separate connection for callbacks, we assume it's OK
3042 * until we hear otherwise:
3044 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3047 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3049 struct file_lock
*fl
;
3051 fl
= locks_alloc_lock();
3054 locks_init_lock(fl
);
3055 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3056 fl
->fl_flags
= FL_DELEG
;
3057 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3058 fl
->fl_end
= OFFSET_MAX
;
3059 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3060 fl
->fl_pid
= current
->tgid
;
3064 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3066 struct nfs4_file
*fp
= dp
->dl_file
;
3067 struct file_lock
*fl
;
3070 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3073 fl
->fl_file
= find_readable_file(fp
);
3074 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3078 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3079 atomic_set(&fp
->fi_delegees
, 1);
3080 spin_lock(&recall_lock
);
3081 hash_delegation_locked(dp
, fp
);
3082 spin_unlock(&recall_lock
);
3085 locks_free_lock(fl
);
3089 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
3091 if (fp
->fi_had_conflict
)
3096 return nfs4_setlease(dp
);
3097 spin_lock(&recall_lock
);
3098 atomic_inc(&fp
->fi_delegees
);
3099 if (fp
->fi_had_conflict
) {
3100 spin_unlock(&recall_lock
);
3103 hash_delegation_locked(dp
, fp
);
3104 spin_unlock(&recall_lock
);
3108 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3110 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3111 if (status
== -EAGAIN
)
3112 open
->op_why_no_deleg
= WND4_CONTENTION
;
3114 open
->op_why_no_deleg
= WND4_RESOURCE
;
3115 switch (open
->op_deleg_want
) {
3116 case NFS4_SHARE_WANT_READ_DELEG
:
3117 case NFS4_SHARE_WANT_WRITE_DELEG
:
3118 case NFS4_SHARE_WANT_ANY_DELEG
:
3120 case NFS4_SHARE_WANT_CANCEL
:
3121 open
->op_why_no_deleg
= WND4_CANCELLED
;
3123 case NFS4_SHARE_WANT_NO_DELEG
:
3130 * Attempt to hand out a delegation.
3132 * Note we don't support write delegations, and won't until the vfs has
3133 * proper support for them.
3136 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3137 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3139 struct nfs4_delegation
*dp
;
3140 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3144 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3145 open
->op_recall
= 0;
3146 switch (open
->op_claim_type
) {
3147 case NFS4_OPEN_CLAIM_PREVIOUS
:
3149 open
->op_recall
= 1;
3150 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3153 case NFS4_OPEN_CLAIM_NULL
:
3154 case NFS4_OPEN_CLAIM_FH
:
3156 * Let's not give out any delegations till everyone's
3157 * had the chance to reclaim theirs....
3159 if (locks_in_grace(net
))
3161 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3164 * Also, if the file was opened for write or
3165 * create, there's a good chance the client's
3166 * about to write to it, resulting in an
3167 * immediate recall (since we don't support
3168 * write delegations):
3170 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3172 if (open
->op_create
== NFS4_OPEN_CREATE
)
3178 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3181 status
= nfs4_set_delegation(dp
, stp
->st_file
);
3185 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3187 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3188 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3189 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3192 destroy_delegation(dp
);
3194 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3195 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3196 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3197 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3198 open
->op_recall
= 1;
3201 /* 4.1 client asking for a delegation? */
3202 if (open
->op_deleg_want
)
3203 nfsd4_open_deleg_none_ext(open
, status
);
3207 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3208 struct nfs4_delegation
*dp
)
3210 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3211 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3212 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3213 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3214 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3215 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3216 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3217 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3219 /* Otherwise the client must be confused wanting a delegation
3220 * it already has, therefore we don't return
3221 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3226 * called with nfs4_lock_state() held.
3229 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3231 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3232 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3233 struct nfs4_file
*fp
= NULL
;
3234 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3235 struct nfs4_ol_stateid
*stp
= NULL
;
3236 struct nfs4_delegation
*dp
= NULL
;
3240 * Lookup file; if found, lookup stateid and check open request,
3241 * and check for delegations in the process of being recalled.
3242 * If not found, create the nfs4_file struct
3244 fp
= find_file(ino
);
3246 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3248 status
= nfs4_check_deleg(cl
, open
, &dp
);
3252 status
= nfserr_bad_stateid
;
3253 if (nfsd4_is_deleg_cur(open
))
3255 status
= nfserr_jukebox
;
3257 open
->op_file
= NULL
;
3258 nfsd4_init_file(fp
, ino
);
3262 * OPEN the file, or upgrade an existing OPEN.
3263 * If truncate fails, the OPEN fails.
3266 /* Stateid was found, this is an OPEN upgrade */
3267 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3271 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3274 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3278 open
->op_stp
= NULL
;
3279 init_open_stateid(stp
, fp
, open
);
3281 update_stateid(&stp
->st_stid
.sc_stateid
);
3282 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3284 if (nfsd4_has_session(&resp
->cstate
)) {
3285 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3287 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3288 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3289 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3295 * Attempt to hand out a delegation. No error return, because the
3296 * OPEN succeeds even if we fail.
3298 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3302 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3303 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3305 /* 4.1 client trying to upgrade/downgrade delegation? */
3306 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3307 open
->op_deleg_want
)
3308 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3312 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3313 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3315 * To finish the open response, we just need to set the rflags.
3317 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3318 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3319 !nfsd4_has_session(&resp
->cstate
))
3320 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3325 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3327 if (open
->op_openowner
) {
3328 struct nfs4_openowner
*oo
= open
->op_openowner
;
3330 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3331 list_del_init(&oo
->oo_close_lru
);
3332 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3334 release_openowner(oo
);
3335 open
->op_openowner
= NULL
;
3337 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3341 nfsd4_free_file(open
->op_file
);
3343 free_generic_stateid(open
->op_stp
);
3346 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3348 struct nfs4_client
*found
;
3350 if (STALE_CLIENTID(clid
, nn
))
3351 return nfserr_stale_clientid
;
3352 found
= find_confirmed_client(clid
, session
, nn
);
3355 return found
? nfs_ok
: nfserr_expired
;
3359 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3362 struct nfs4_client
*clp
;
3364 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3367 dprintk("process_renew(%08x/%08x): starting\n",
3368 clid
->cl_boot
, clid
->cl_id
);
3369 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3372 status
= nfserr_cb_path_down
;
3373 if (!list_empty(&clp
->cl_delegations
)
3374 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3378 nfs4_unlock_state();
3383 nfsd4_end_grace(struct nfsd_net
*nn
)
3385 /* do nothing if grace period already ended */
3386 if (nn
->grace_ended
)
3389 dprintk("NFSD: end of grace period\n");
3390 nn
->grace_ended
= true;
3391 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3392 locks_end_grace(&nn
->nfsd4_manager
);
3394 * Now that every NFSv4 client has had the chance to recover and
3395 * to see the (possibly new, possibly shorter) lease time, we
3396 * can safely set the next grace time to the current lease time:
3398 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3402 nfs4_laundromat(struct nfsd_net
*nn
)
3404 struct nfs4_client
*clp
;
3405 struct nfs4_openowner
*oo
;
3406 struct nfs4_delegation
*dp
;
3407 struct list_head
*pos
, *next
, reaplist
;
3408 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3409 time_t t
, new_timeo
= nn
->nfsd4_lease
;
3413 dprintk("NFSD: laundromat service - starting\n");
3414 nfsd4_end_grace(nn
);
3415 INIT_LIST_HEAD(&reaplist
);
3416 spin_lock(&nn
->client_lock
);
3417 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3418 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3419 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3420 t
= clp
->cl_time
- cutoff
;
3421 new_timeo
= min(new_timeo
, t
);
3424 if (mark_client_expired_locked(clp
)) {
3425 dprintk("NFSD: client in use (clientid %08x)\n",
3426 clp
->cl_clientid
.cl_id
);
3429 list_move(&clp
->cl_lru
, &reaplist
);
3431 spin_unlock(&nn
->client_lock
);
3432 list_for_each_safe(pos
, next
, &reaplist
) {
3433 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3434 dprintk("NFSD: purging unused client (clientid %08x)\n",
3435 clp
->cl_clientid
.cl_id
);
3438 spin_lock(&recall_lock
);
3439 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3440 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3441 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3443 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3444 t
= dp
->dl_time
- cutoff
;
3445 new_timeo
= min(new_timeo
, t
);
3448 list_move(&dp
->dl_recall_lru
, &reaplist
);
3450 spin_unlock(&recall_lock
);
3451 list_for_each_safe(pos
, next
, &reaplist
) {
3452 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3453 revoke_delegation(dp
);
3455 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3456 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3457 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3458 t
= oo
->oo_time
- cutoff
;
3459 new_timeo
= min(new_timeo
, t
);
3462 release_openowner(oo
);
3464 new_timeo
= max_t(time_t, new_timeo
, NFSD_LAUNDROMAT_MINTIMEOUT
);
3465 nfs4_unlock_state();
3469 static struct workqueue_struct
*laundry_wq
;
3470 static void laundromat_main(struct work_struct
*);
3473 laundromat_main(struct work_struct
*laundry
)
3476 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3478 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3481 t
= nfs4_laundromat(nn
);
3482 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3483 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3486 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3488 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3489 return nfserr_bad_stateid
;
3494 access_permit_read(struct nfs4_ol_stateid
*stp
)
3496 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3497 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3498 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3502 access_permit_write(struct nfs4_ol_stateid
*stp
)
3504 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3505 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3509 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3511 __be32 status
= nfserr_openmode
;
3513 /* For lock stateid's, we test the parent open, not the lock: */
3514 if (stp
->st_openstp
)
3515 stp
= stp
->st_openstp
;
3516 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3518 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3525 static inline __be32
3526 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3528 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3530 else if (locks_in_grace(net
)) {
3531 /* Answer in remaining cases depends on existence of
3532 * conflicting state; so we must wait out the grace period. */
3533 return nfserr_grace
;
3534 } else if (flags
& WR_STATE
)
3535 return nfs4_share_conflict(current_fh
,
3536 NFS4_SHARE_DENY_WRITE
);
3537 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3538 return nfs4_share_conflict(current_fh
,
3539 NFS4_SHARE_DENY_READ
);
3543 * Allow READ/WRITE during grace period on recovered state only for files
3544 * that are not able to provide mandatory locking.
3547 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3549 return locks_in_grace(net
) && mandatory_lock(inode
);
3552 /* Returns true iff a is later than b: */
3553 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3555 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3558 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3561 * When sessions are used the stateid generation number is ignored
3564 if (has_session
&& in
->si_generation
== 0)
3567 if (in
->si_generation
== ref
->si_generation
)
3570 /* If the client sends us a stateid from the future, it's buggy: */
3571 if (stateid_generation_after(in
, ref
))
3572 return nfserr_bad_stateid
;
3574 * However, we could see a stateid from the past, even from a
3575 * non-buggy client. For example, if the client sends a lock
3576 * while some IO is outstanding, the lock may bump si_generation
3577 * while the IO is still in flight. The client could avoid that
3578 * situation by waiting for responses on all the IO requests,
3579 * but better performance may result in retrying IO that
3580 * receives an old_stateid error if requests are rarely
3581 * reordered in flight:
3583 return nfserr_old_stateid
;
3586 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3588 struct nfs4_stid
*s
;
3589 struct nfs4_ol_stateid
*ols
;
3592 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3593 return nfserr_bad_stateid
;
3594 /* Client debugging aid. */
3595 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3596 char addr_str
[INET6_ADDRSTRLEN
];
3597 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3599 pr_warn_ratelimited("NFSD: client %s testing state ID "
3600 "with incorrect client ID\n", addr_str
);
3601 return nfserr_bad_stateid
;
3603 s
= find_stateid(cl
, stateid
);
3605 return nfserr_bad_stateid
;
3606 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3609 switch (s
->sc_type
) {
3610 case NFS4_DELEG_STID
:
3612 case NFS4_REVOKED_DELEG_STID
:
3613 return nfserr_deleg_revoked
;
3614 case NFS4_OPEN_STID
:
3615 case NFS4_LOCK_STID
:
3616 ols
= openlockstateid(s
);
3617 if (ols
->st_stateowner
->so_is_open_owner
3618 && !(openowner(ols
->st_stateowner
)->oo_flags
3619 & NFS4_OO_CONFIRMED
))
3620 return nfserr_bad_stateid
;
3623 printk("unknown stateid type %x\n", s
->sc_type
);
3624 case NFS4_CLOSED_STID
:
3625 return nfserr_bad_stateid
;
3629 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3630 struct nfs4_stid
**s
, bool sessions
,
3631 struct nfsd_net
*nn
)
3633 struct nfs4_client
*cl
;
3636 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3637 return nfserr_bad_stateid
;
3638 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3640 if (status
== nfserr_stale_clientid
) {
3642 return nfserr_bad_stateid
;
3643 return nfserr_stale_stateid
;
3647 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3649 return nfserr_bad_stateid
;
3654 * Checks for stateid operations
3657 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3658 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3660 struct nfs4_stid
*s
;
3661 struct nfs4_ol_stateid
*stp
= NULL
;
3662 struct nfs4_delegation
*dp
= NULL
;
3663 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3664 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3665 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3666 struct file
*file
= NULL
;
3672 if (grace_disallows_io(net
, ino
))
3673 return nfserr_grace
;
3675 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3676 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3680 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3681 &s
, cstate
->minorversion
, nn
);
3684 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3687 switch (s
->sc_type
) {
3688 case NFS4_DELEG_STID
:
3689 dp
= delegstateid(s
);
3690 status
= nfs4_check_delegmode(dp
, flags
);
3694 file
= dp
->dl_file
->fi_deleg_file
;
3697 status
= nfserr_serverfault
;
3702 case NFS4_OPEN_STID
:
3703 case NFS4_LOCK_STID
:
3704 stp
= openlockstateid(s
);
3705 status
= nfs4_check_fh(current_fh
, stp
);
3708 if (stp
->st_stateowner
->so_is_open_owner
3709 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3711 status
= nfs4_check_openmode(stp
, flags
);
3715 if (flags
& RD_STATE
)
3716 file
= find_readable_file(stp
->st_file
);
3718 file
= find_writeable_file(stp
->st_file
);
3722 status
= nfserr_bad_stateid
;
3727 *filpp
= get_file(file
);
3729 nfs4_unlock_state();
3734 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3736 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
3738 if (check_for_locks(stp
->st_file
, lo
))
3739 return nfserr_locks_held
;
3741 * Currently there's a 1-1 lock stateid<->lockowner
3742 * correspondance, and we have to delete the lockowner when we
3743 * delete the lock stateid:
3745 unhash_lockowner(lo
);
3750 * Test if the stateid is valid
3753 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3754 struct nfsd4_test_stateid
*test_stateid
)
3756 struct nfsd4_test_stateid_id
*stateid
;
3757 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3760 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3761 stateid
->ts_id_status
=
3762 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3763 nfs4_unlock_state();
3769 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3770 struct nfsd4_free_stateid
*free_stateid
)
3772 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3773 struct nfs4_stid
*s
;
3774 struct nfs4_delegation
*dp
;
3775 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3776 __be32 ret
= nfserr_bad_stateid
;
3779 s
= find_stateid(cl
, stateid
);
3782 switch (s
->sc_type
) {
3783 case NFS4_DELEG_STID
:
3784 ret
= nfserr_locks_held
;
3786 case NFS4_OPEN_STID
:
3787 case NFS4_LOCK_STID
:
3788 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3791 if (s
->sc_type
== NFS4_LOCK_STID
)
3792 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3794 ret
= nfserr_locks_held
;
3796 case NFS4_REVOKED_DELEG_STID
:
3797 dp
= delegstateid(s
);
3798 destroy_revoked_delegation(dp
);
3802 ret
= nfserr_bad_stateid
;
3805 nfs4_unlock_state();
3812 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3813 RD_STATE
: WR_STATE
;
3816 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3818 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3819 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3822 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3825 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3826 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3828 * "Closed" stateid's exist *only* to return
3829 * nfserr_replay_me from the previous step, and
3830 * revoked delegations are kept only for free_stateid.
3832 return nfserr_bad_stateid
;
3833 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3836 return nfs4_check_fh(current_fh
, stp
);
3840 * Checks for sequence id mutating operations.
3843 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3844 stateid_t
*stateid
, char typemask
,
3845 struct nfs4_ol_stateid
**stpp
,
3846 struct nfsd_net
*nn
)
3849 struct nfs4_stid
*s
;
3851 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3852 seqid
, STATEID_VAL(stateid
));
3855 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3856 cstate
->minorversion
, nn
);
3859 *stpp
= openlockstateid(s
);
3860 if (!nfsd4_has_session(cstate
))
3861 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3863 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3866 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3867 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3870 struct nfs4_openowner
*oo
;
3872 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3873 NFS4_OPEN_STID
, stpp
, nn
);
3876 oo
= openowner((*stpp
)->st_stateowner
);
3877 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3878 return nfserr_bad_stateid
;
3883 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3884 struct nfsd4_open_confirm
*oc
)
3887 struct nfs4_openowner
*oo
;
3888 struct nfs4_ol_stateid
*stp
;
3889 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3891 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3892 cstate
->current_fh
.fh_dentry
);
3894 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3900 status
= nfs4_preprocess_seqid_op(cstate
,
3901 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3902 NFS4_OPEN_STID
, &stp
, nn
);
3905 oo
= openowner(stp
->st_stateowner
);
3906 status
= nfserr_bad_stateid
;
3907 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3909 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3910 update_stateid(&stp
->st_stid
.sc_stateid
);
3911 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3912 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3913 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3915 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3918 nfsd4_bump_seqid(cstate
, status
);
3919 if (!cstate
->replay_owner
)
3920 nfs4_unlock_state();
3924 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3926 if (!test_access(access
, stp
))
3928 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3929 clear_access(access
, stp
);
3932 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3934 switch (to_access
) {
3935 case NFS4_SHARE_ACCESS_READ
:
3936 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3937 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3939 case NFS4_SHARE_ACCESS_WRITE
:
3940 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3941 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3943 case NFS4_SHARE_ACCESS_BOTH
:
3951 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3954 for (i
= 0; i
< 4; i
++) {
3955 if ((i
& deny
) != i
)
3961 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3962 struct nfsd4_compound_state
*cstate
,
3963 struct nfsd4_open_downgrade
*od
)
3966 struct nfs4_ol_stateid
*stp
;
3967 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3969 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
3970 cstate
->current_fh
.fh_dentry
);
3972 /* We don't yet support WANT bits: */
3973 if (od
->od_deleg_want
)
3974 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3978 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3979 &od
->od_stateid
, &stp
, nn
);
3982 status
= nfserr_inval
;
3983 if (!test_access(od
->od_share_access
, stp
)) {
3984 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3985 stp
->st_access_bmap
, od
->od_share_access
);
3988 if (!test_deny(od
->od_share_deny
, stp
)) {
3989 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3990 stp
->st_deny_bmap
, od
->od_share_deny
);
3993 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3995 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3997 update_stateid(&stp
->st_stid
.sc_stateid
);
3998 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4001 nfsd4_bump_seqid(cstate
, status
);
4002 if (!cstate
->replay_owner
)
4003 nfs4_unlock_state();
4007 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
4009 unhash_open_stateid(s
);
4010 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
4014 * nfs4_unlock_state() called after encode
4017 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4018 struct nfsd4_close
*close
)
4021 struct nfs4_openowner
*oo
;
4022 struct nfs4_ol_stateid
*stp
;
4023 struct net
*net
= SVC_NET(rqstp
);
4024 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4026 dprintk("NFSD: nfsd4_close on file %pd\n",
4027 cstate
->current_fh
.fh_dentry
);
4030 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4032 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4034 nfsd4_bump_seqid(cstate
, status
);
4037 oo
= openowner(stp
->st_stateowner
);
4038 update_stateid(&stp
->st_stid
.sc_stateid
);
4039 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4041 nfsd4_close_open_stateid(stp
);
4043 if (cstate
->minorversion
)
4044 free_generic_stateid(stp
);
4046 oo
->oo_last_closed_stid
= stp
;
4048 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
4049 if (cstate
->minorversion
)
4050 release_openowner(oo
);
4053 * In the 4.0 case we need to keep the owners around a
4054 * little while to handle CLOSE replay.
4056 move_to_close_lru(oo
, SVC_NET(rqstp
));
4060 if (!cstate
->replay_owner
)
4061 nfs4_unlock_state();
4066 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4067 struct nfsd4_delegreturn
*dr
)
4069 struct nfs4_delegation
*dp
;
4070 stateid_t
*stateid
= &dr
->dr_stateid
;
4071 struct nfs4_stid
*s
;
4073 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4075 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4079 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4080 cstate
->minorversion
, nn
);
4083 dp
= delegstateid(s
);
4084 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4088 destroy_delegation(dp
);
4090 nfs4_unlock_state();
4096 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4098 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4101 end_offset(u64 start
, u64 len
)
4106 return end
>= start
? end
: NFS4_MAX_UINT64
;
4109 /* last octet in a range */
4111 last_byte_offset(u64 start
, u64 len
)
4117 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4120 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4122 return (file_hashval(inode
) + cl_id
4123 + opaque_hashval(ownername
->data
, ownername
->len
))
4124 & LOCKOWNER_INO_HASH_MASK
;
4128 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4129 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4130 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4131 * locking, this prevents us from being completely protocol-compliant. The
4132 * real solution to this problem is to start using unsigned file offsets in
4133 * the VFS, but this is a very deep change!
4136 nfs4_transform_lock_offset(struct file_lock
*lock
)
4138 if (lock
->fl_start
< 0)
4139 lock
->fl_start
= OFFSET_MAX
;
4140 if (lock
->fl_end
< 0)
4141 lock
->fl_end
= OFFSET_MAX
;
4144 /* Hack!: For now, we're defining this just so we can use a pointer to it
4145 * as a unique cookie to identify our (NFSv4's) posix locks. */
4146 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4150 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4152 struct nfs4_lockowner
*lo
;
4154 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4155 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4156 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4157 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4158 if (!deny
->ld_owner
.data
)
4159 /* We just don't care that much */
4161 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4162 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4165 deny
->ld_owner
.len
= 0;
4166 deny
->ld_owner
.data
= NULL
;
4167 deny
->ld_clientid
.cl_boot
= 0;
4168 deny
->ld_clientid
.cl_id
= 0;
4170 deny
->ld_start
= fl
->fl_start
;
4171 deny
->ld_length
= NFS4_MAX_UINT64
;
4172 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4173 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4174 deny
->ld_type
= NFS4_READ_LT
;
4175 if (fl
->fl_type
!= F_RDLCK
)
4176 deny
->ld_type
= NFS4_WRITE_LT
;
4179 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4181 struct nfs4_ol_stateid
*lst
;
4183 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4185 if (list_empty(&lo
->lo_owner
.so_stateids
)) {
4189 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4190 struct nfs4_ol_stateid
, st_perstateowner
);
4191 return lst
->st_file
->fi_inode
== inode
;
4194 static struct nfs4_lockowner
*
4195 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4196 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4198 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4199 struct nfs4_lockowner
*lo
;
4201 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4202 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4208 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4210 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4211 unsigned int inohash
= lockowner_ino_hashval(inode
,
4212 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4213 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4215 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4216 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4217 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4221 * Alloc a lock owner structure.
4222 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4225 * strhashval = ownerstr_hashval
4228 static struct nfs4_lockowner
*
4229 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4230 struct nfs4_lockowner
*lo
;
4232 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4235 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4236 lo
->lo_owner
.so_is_open_owner
= 0;
4237 /* It is the openowner seqid that will be incremented in encode in the
4238 * case of new lockowners; so increment the lock seqid manually: */
4239 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4240 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4244 static struct nfs4_ol_stateid
*
4245 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4247 struct nfs4_ol_stateid
*stp
;
4248 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4250 stp
= nfs4_alloc_stateid(clp
);
4253 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4254 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4255 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4256 stp
->st_stateowner
= &lo
->lo_owner
;
4259 stp
->st_access_bmap
= 0;
4260 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4261 stp
->st_openstp
= open_stp
;
4266 check_lock_length(u64 offset
, u64 length
)
4268 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4269 LOFF_OVERFLOW(offset
, length
)));
4272 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4274 struct nfs4_file
*fp
= lock_stp
->st_file
;
4275 int oflag
= nfs4_access_to_omode(access
);
4277 if (test_access(access
, lock_stp
))
4279 nfs4_file_get_access(fp
, oflag
);
4280 set_access(access
, lock_stp
);
4283 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)
4285 struct nfs4_file
*fi
= ost
->st_file
;
4286 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4287 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4288 struct nfs4_lockowner
*lo
;
4289 unsigned int strhashval
;
4290 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4292 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4293 &lock
->v
.new.owner
, nn
);
4295 if (!cstate
->minorversion
)
4296 return nfserr_bad_seqid
;
4297 /* XXX: a lockowner always has exactly one stateid: */
4298 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4299 struct nfs4_ol_stateid
, st_perstateowner
);
4302 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4303 &lock
->v
.new.owner
);
4304 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4306 return nfserr_jukebox
;
4307 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4309 release_lockowner(lo
);
4310 return nfserr_jukebox
;
4320 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4321 struct nfsd4_lock
*lock
)
4323 struct nfs4_openowner
*open_sop
= NULL
;
4324 struct nfs4_lockowner
*lock_sop
= NULL
;
4325 struct nfs4_ol_stateid
*lock_stp
;
4326 struct file
*filp
= NULL
;
4327 struct file_lock
*file_lock
= NULL
;
4328 struct file_lock
*conflock
= NULL
;
4330 bool new_state
= false;
4333 struct net
*net
= SVC_NET(rqstp
);
4334 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4336 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4337 (long long) lock
->lk_offset
,
4338 (long long) lock
->lk_length
);
4340 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4341 return nfserr_inval
;
4343 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4344 S_IFREG
, NFSD_MAY_LOCK
))) {
4345 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4351 if (lock
->lk_is_new
) {
4352 struct nfs4_ol_stateid
*open_stp
= NULL
;
4354 if (nfsd4_has_session(cstate
))
4355 /* See rfc 5661 18.10.3: given clientid is ignored: */
4356 memcpy(&lock
->v
.new.clientid
,
4357 &cstate
->session
->se_client
->cl_clientid
,
4358 sizeof(clientid_t
));
4360 status
= nfserr_stale_clientid
;
4361 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4364 /* validate and update open stateid and open seqid */
4365 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4366 lock
->lk_new_open_seqid
,
4367 &lock
->lk_new_open_stateid
,
4371 open_sop
= openowner(open_stp
->st_stateowner
);
4372 status
= nfserr_bad_stateid
;
4373 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4374 &lock
->v
.new.clientid
))
4376 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4377 &lock_stp
, &new_state
);
4379 status
= nfs4_preprocess_seqid_op(cstate
,
4380 lock
->lk_old_lock_seqid
,
4381 &lock
->lk_old_lock_stateid
,
4382 NFS4_LOCK_STID
, &lock_stp
, nn
);
4385 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4387 lkflg
= setlkflg(lock
->lk_type
);
4388 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4392 status
= nfserr_grace
;
4393 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4395 status
= nfserr_no_grace
;
4396 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4399 file_lock
= locks_alloc_lock();
4401 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4402 status
= nfserr_jukebox
;
4406 locks_init_lock(file_lock
);
4407 switch (lock
->lk_type
) {
4410 filp
= find_readable_file(lock_stp
->st_file
);
4412 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4413 file_lock
->fl_type
= F_RDLCK
;
4416 case NFS4_WRITEW_LT
:
4417 filp
= find_writeable_file(lock_stp
->st_file
);
4419 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4420 file_lock
->fl_type
= F_WRLCK
;
4423 status
= nfserr_inval
;
4427 status
= nfserr_openmode
;
4430 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4431 file_lock
->fl_pid
= current
->tgid
;
4432 file_lock
->fl_file
= filp
;
4433 file_lock
->fl_flags
= FL_POSIX
;
4434 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4435 file_lock
->fl_start
= lock
->lk_offset
;
4436 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4437 nfs4_transform_lock_offset(file_lock
);
4439 conflock
= locks_alloc_lock();
4441 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4442 status
= nfserr_jukebox
;
4446 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4448 case 0: /* success! */
4449 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4450 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4454 case (EAGAIN
): /* conflock holds conflicting lock */
4455 status
= nfserr_denied
;
4456 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4457 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4460 status
= nfserr_deadlock
;
4463 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4464 status
= nfserrno(err
);
4468 if (status
&& new_state
)
4469 release_lockowner(lock_sop
);
4470 nfsd4_bump_seqid(cstate
, status
);
4471 if (!cstate
->replay_owner
)
4472 nfs4_unlock_state();
4474 locks_free_lock(file_lock
);
4476 locks_free_lock(conflock
);
4481 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4482 * so we do a temporary open here just to get an open file to pass to
4483 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4486 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4489 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4491 err
= nfserrno(vfs_test_lock(file
, lock
));
4501 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4502 struct nfsd4_lockt
*lockt
)
4504 struct inode
*inode
;
4505 struct file_lock
*file_lock
= NULL
;
4506 struct nfs4_lockowner
*lo
;
4508 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4510 if (locks_in_grace(SVC_NET(rqstp
)))
4511 return nfserr_grace
;
4513 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4514 return nfserr_inval
;
4518 if (!nfsd4_has_session(cstate
)) {
4519 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4524 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4527 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4528 file_lock
= locks_alloc_lock();
4530 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4531 status
= nfserr_jukebox
;
4534 locks_init_lock(file_lock
);
4535 switch (lockt
->lt_type
) {
4538 file_lock
->fl_type
= F_RDLCK
;
4541 case NFS4_WRITEW_LT
:
4542 file_lock
->fl_type
= F_WRLCK
;
4545 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4546 status
= nfserr_inval
;
4550 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4552 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4553 file_lock
->fl_pid
= current
->tgid
;
4554 file_lock
->fl_flags
= FL_POSIX
;
4556 file_lock
->fl_start
= lockt
->lt_offset
;
4557 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4559 nfs4_transform_lock_offset(file_lock
);
4561 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4565 if (file_lock
->fl_type
!= F_UNLCK
) {
4566 status
= nfserr_denied
;
4567 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4570 nfs4_unlock_state();
4572 locks_free_lock(file_lock
);
4577 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4578 struct nfsd4_locku
*locku
)
4580 struct nfs4_ol_stateid
*stp
;
4581 struct file
*filp
= NULL
;
4582 struct file_lock
*file_lock
= NULL
;
4585 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4587 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4588 (long long) locku
->lu_offset
,
4589 (long long) locku
->lu_length
);
4591 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4592 return nfserr_inval
;
4596 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4597 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4601 filp
= find_any_file(stp
->st_file
);
4603 status
= nfserr_lock_range
;
4606 file_lock
= locks_alloc_lock();
4608 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4609 status
= nfserr_jukebox
;
4612 locks_init_lock(file_lock
);
4613 file_lock
->fl_type
= F_UNLCK
;
4614 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4615 file_lock
->fl_pid
= current
->tgid
;
4616 file_lock
->fl_file
= filp
;
4617 file_lock
->fl_flags
= FL_POSIX
;
4618 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4619 file_lock
->fl_start
= locku
->lu_offset
;
4621 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4623 nfs4_transform_lock_offset(file_lock
);
4625 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4627 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4630 update_stateid(&stp
->st_stid
.sc_stateid
);
4631 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4634 nfsd4_bump_seqid(cstate
, status
);
4635 if (!cstate
->replay_owner
)
4636 nfs4_unlock_state();
4638 locks_free_lock(file_lock
);
4642 status
= nfserrno(err
);
4648 * 1: locks held by lockowner
4649 * 0: no locks held by lockowner
4652 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4654 struct file_lock
**flpp
;
4655 struct inode
*inode
= filp
->fi_inode
;
4658 spin_lock(&inode
->i_lock
);
4659 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4660 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4666 spin_unlock(&inode
->i_lock
);
4671 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4672 struct nfsd4_compound_state
*cstate
,
4673 struct nfsd4_release_lockowner
*rlockowner
)
4675 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4676 struct nfs4_stateowner
*sop
;
4677 struct nfs4_lockowner
*lo
;
4678 struct nfs4_ol_stateid
*stp
;
4679 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4680 struct list_head matches
;
4681 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4683 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4685 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4686 clid
->cl_boot
, clid
->cl_id
);
4690 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4694 status
= nfserr_locks_held
;
4695 INIT_LIST_HEAD(&matches
);
4697 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4698 if (sop
->so_is_open_owner
)
4700 if (!same_owner_str(sop
, owner
, clid
))
4702 list_for_each_entry(stp
, &sop
->so_stateids
,
4704 lo
= lockowner(sop
);
4705 if (check_for_locks(stp
->st_file
, lo
))
4707 list_add(&lo
->lo_list
, &matches
);
4710 /* Clients probably won't expect us to return with some (but not all)
4711 * of the lockowner state released; so don't release any until all
4712 * have been checked. */
4714 while (!list_empty(&matches
)) {
4715 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4717 /* unhash_stateowner deletes so_perclient only
4718 * for openowners. */
4719 list_del(&lo
->lo_list
);
4720 release_lockowner(lo
);
4723 nfs4_unlock_state();
4727 static inline struct nfs4_client_reclaim
*
4730 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4734 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4736 struct nfs4_client_reclaim
*crp
;
4738 crp
= nfsd4_find_reclaim_client(name
, nn
);
4739 return (crp
&& crp
->cr_clp
);
4743 * failure => all reset bets are off, nfserr_no_grace...
4745 struct nfs4_client_reclaim
*
4746 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4748 unsigned int strhashval
;
4749 struct nfs4_client_reclaim
*crp
;
4751 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4752 crp
= alloc_reclaim();
4754 strhashval
= clientstr_hashval(name
);
4755 INIT_LIST_HEAD(&crp
->cr_strhash
);
4756 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4757 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4759 nn
->reclaim_str_hashtbl_size
++;
4765 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4767 list_del(&crp
->cr_strhash
);
4769 nn
->reclaim_str_hashtbl_size
--;
4773 nfs4_release_reclaim(struct nfsd_net
*nn
)
4775 struct nfs4_client_reclaim
*crp
= NULL
;
4778 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4779 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4780 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4781 struct nfs4_client_reclaim
, cr_strhash
);
4782 nfs4_remove_reclaim_record(crp
, nn
);
4785 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4789 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4790 struct nfs4_client_reclaim
*
4791 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4793 unsigned int strhashval
;
4794 struct nfs4_client_reclaim
*crp
= NULL
;
4796 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4798 strhashval
= clientstr_hashval(recdir
);
4799 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4800 if (same_name(crp
->cr_recdir
, recdir
)) {
4808 * Called from OPEN. Look for clientid in reclaim list.
4811 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4813 struct nfs4_client
*clp
;
4815 /* find clientid in conf_id_hashtbl */
4816 clp
= find_confirmed_client(clid
, sessions
, nn
);
4818 return nfserr_reclaim_bad
;
4820 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4823 #ifdef CONFIG_NFSD_FAULT_INJECTION
4825 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4827 if (mark_client_expired(clp
))
4833 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4835 char buf
[INET6_ADDRSTRLEN
];
4836 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4837 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4841 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4844 char buf
[INET6_ADDRSTRLEN
];
4845 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4846 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4849 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4851 struct nfs4_openowner
*oop
;
4852 struct nfs4_lockowner
*lop
, *lo_next
;
4853 struct nfs4_ol_stateid
*stp
, *st_next
;
4856 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4857 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4858 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4870 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4872 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4875 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4877 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4878 nfsd_print_count(clp
, count
, "locked files");
4882 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4884 struct nfs4_openowner
*oop
, *next
;
4887 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4897 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4899 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4902 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4904 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4905 nfsd_print_count(clp
, count
, "open files");
4909 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4910 struct list_head
*victims
)
4912 struct nfs4_delegation
*dp
, *next
;
4915 lockdep_assert_held(&recall_lock
);
4916 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4918 list_move(&dp
->dl_recall_lru
, victims
);
4925 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4927 struct nfs4_delegation
*dp
, *next
;
4931 spin_lock(&recall_lock
);
4932 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4933 spin_unlock(&recall_lock
);
4935 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4936 revoke_delegation(dp
);
4941 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4943 struct nfs4_delegation
*dp
, *next
;
4947 spin_lock(&recall_lock
);
4948 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4949 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4950 nfsd_break_one_deleg(dp
);
4951 spin_unlock(&recall_lock
);
4956 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4960 spin_lock(&recall_lock
);
4961 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4962 spin_unlock(&recall_lock
);
4964 nfsd_print_count(clp
, count
, "delegations");
4968 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4970 struct nfs4_client
*clp
, *next
;
4972 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4974 if (!nfsd_netns_ready(nn
))
4977 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4978 count
+= func(clp
, max
- count
);
4979 if ((max
!= 0) && (count
>= max
))
4986 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4988 struct nfs4_client
*clp
;
4989 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4991 if (!nfsd_netns_ready(nn
))
4994 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4995 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
5001 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5004 * Since the lifetime of a delegation isn't limited to that of an open, a
5005 * client may quite reasonably hang on to a delegation as long as it has
5006 * the inode cached. This becomes an obvious problem the first time a
5007 * client's inode cache approaches the size of the server's total memory.
5009 * For now we avoid this problem by imposing a hard limit on the number
5010 * of delegations, which varies according to the server's memory size.
5013 set_max_delegations(void)
5016 * Allow at most 4 delegations per megabyte of RAM. Quick
5017 * estimates suggest that in the worst case (where every delegation
5018 * is for a different inode), a delegation could take about 1.5K,
5019 * giving a worst case usage of about 6% of memory.
5021 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
5024 static int nfs4_state_create_net(struct net
*net
)
5026 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5029 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5030 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5031 if (!nn
->conf_id_hashtbl
)
5033 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5034 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5035 if (!nn
->unconf_id_hashtbl
)
5037 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
5038 OWNER_HASH_SIZE
, GFP_KERNEL
);
5039 if (!nn
->ownerstr_hashtbl
)
5041 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
5042 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
5043 if (!nn
->lockowner_ino_hashtbl
)
5044 goto err_lockowner_ino
;
5045 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
5046 SESSION_HASH_SIZE
, GFP_KERNEL
);
5047 if (!nn
->sessionid_hashtbl
)
5050 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5051 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5052 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5054 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5055 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5056 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5057 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5058 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5059 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5060 nn
->conf_name_tree
= RB_ROOT
;
5061 nn
->unconf_name_tree
= RB_ROOT
;
5062 INIT_LIST_HEAD(&nn
->client_lru
);
5063 INIT_LIST_HEAD(&nn
->close_lru
);
5064 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5065 spin_lock_init(&nn
->client_lock
);
5067 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5073 kfree(nn
->lockowner_ino_hashtbl
);
5075 kfree(nn
->ownerstr_hashtbl
);
5077 kfree(nn
->unconf_id_hashtbl
);
5079 kfree(nn
->conf_id_hashtbl
);
5085 nfs4_state_destroy_net(struct net
*net
)
5088 struct nfs4_client
*clp
= NULL
;
5089 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5091 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5092 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5093 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5094 destroy_client(clp
);
5098 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5099 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
5100 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5101 destroy_client(clp
);
5105 kfree(nn
->sessionid_hashtbl
);
5106 kfree(nn
->lockowner_ino_hashtbl
);
5107 kfree(nn
->ownerstr_hashtbl
);
5108 kfree(nn
->unconf_id_hashtbl
);
5109 kfree(nn
->conf_id_hashtbl
);
5114 nfs4_state_start_net(struct net
*net
)
5116 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5119 ret
= nfs4_state_create_net(net
);
5122 nfsd4_client_tracking_init(net
);
5123 nn
->boot_time
= get_seconds();
5124 locks_start_grace(net
, &nn
->nfsd4_manager
);
5125 nn
->grace_ended
= false;
5126 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5127 nn
->nfsd4_grace
, net
);
5128 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5132 /* initialization to perform when the nfsd service is started: */
5135 nfs4_state_start(void)
5139 ret
= set_callback_cred();
5142 laundry_wq
= create_singlethread_workqueue("nfsd4");
5143 if (laundry_wq
== NULL
) {
5147 ret
= nfsd4_create_callback_queue();
5149 goto out_free_laundry
;
5151 set_max_delegations();
5156 destroy_workqueue(laundry_wq
);
5162 nfs4_state_shutdown_net(struct net
*net
)
5164 struct nfs4_delegation
*dp
= NULL
;
5165 struct list_head
*pos
, *next
, reaplist
;
5166 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5168 cancel_delayed_work_sync(&nn
->laundromat_work
);
5169 locks_end_grace(&nn
->nfsd4_manager
);
5172 INIT_LIST_HEAD(&reaplist
);
5173 spin_lock(&recall_lock
);
5174 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5175 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5176 list_move(&dp
->dl_recall_lru
, &reaplist
);
5178 spin_unlock(&recall_lock
);
5179 list_for_each_safe(pos
, next
, &reaplist
) {
5180 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5181 destroy_delegation(dp
);
5184 nfsd4_client_tracking_exit(net
);
5185 nfs4_state_destroy_net(net
);
5186 nfs4_unlock_state();
5190 nfs4_state_shutdown(void)
5192 destroy_workqueue(laundry_wq
);
5193 nfsd4_destroy_callback_queue();
5197 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5199 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5200 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5204 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5206 if (cstate
->minorversion
) {
5207 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5208 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5213 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5215 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5219 * functions to set current state id
5222 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5224 put_stateid(cstate
, &odp
->od_stateid
);
5228 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5230 put_stateid(cstate
, &open
->op_stateid
);
5234 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5236 put_stateid(cstate
, &close
->cl_stateid
);
5240 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5242 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5246 * functions to consume current state id
5250 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5252 get_stateid(cstate
, &odp
->od_stateid
);
5256 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5258 get_stateid(cstate
, &drp
->dr_stateid
);
5262 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5264 get_stateid(cstate
, &fsp
->fr_stateid
);
5268 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5270 get_stateid(cstate
, &setattr
->sa_stateid
);
5274 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5276 get_stateid(cstate
, &close
->cl_stateid
);
5280 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5282 get_stateid(cstate
, &locku
->lu_stateid
);
5286 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5288 get_stateid(cstate
, &read
->rd_stateid
);
5292 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5294 get_stateid(cstate
, &write
->wr_stateid
);