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
= NULL
;
87 static struct kmem_cache
*lockowner_slab
= NULL
;
88 static struct kmem_cache
*file_slab
= NULL
;
89 static struct kmem_cache
*stateid_slab
= NULL
;
90 static struct kmem_cache
*deleg_slab
= NULL
;
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
)
421 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
422 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
424 fput(fp
->fi_deleg_file
);
425 fp
->fi_deleg_file
= NULL
;
429 static void unhash_stid(struct nfs4_stid
*s
)
434 /* Called under the state lock. */
436 unhash_delegation(struct nfs4_delegation
*dp
)
438 list_del_init(&dp
->dl_perclnt
);
439 spin_lock(&recall_lock
);
440 list_del_init(&dp
->dl_perfile
);
441 list_del_init(&dp
->dl_recall_lru
);
442 spin_unlock(&recall_lock
);
443 nfs4_put_deleg_lease(dp
->dl_file
);
444 put_nfs4_file(dp
->dl_file
);
450 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
452 list_del_init(&dp
->dl_recall_lru
);
453 remove_stid(&dp
->dl_stid
);
454 nfs4_put_delegation(dp
);
457 static void destroy_delegation(struct nfs4_delegation
*dp
)
459 unhash_delegation(dp
);
460 remove_stid(&dp
->dl_stid
);
461 nfs4_put_delegation(dp
);
464 static void revoke_delegation(struct nfs4_delegation
*dp
)
466 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
468 if (clp
->cl_minorversion
== 0)
469 destroy_delegation(dp
);
471 unhash_delegation(dp
);
472 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
473 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
481 static unsigned int clientid_hashval(u32 id
)
483 return id
& CLIENT_HASH_MASK
;
486 static unsigned int clientstr_hashval(const char *name
)
488 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
492 * We store the NONE, READ, WRITE, and BOTH bits separately in the
493 * st_{access,deny}_bmap field of the stateid, in order to track not
494 * only what share bits are currently in force, but also what
495 * combinations of share bits previous opens have used. This allows us
496 * to enforce the recommendation of rfc 3530 14.2.19 that the server
497 * return an error if the client attempt to downgrade to a combination
498 * of share bits not explicable by closing some of its previous opens.
500 * XXX: This enforcement is actually incomplete, since we don't keep
501 * track of access/deny bit combinations; so, e.g., we allow:
503 * OPEN allow read, deny write
504 * OPEN allow both, deny none
505 * DOWNGRADE allow read, deny none
507 * which we should reject.
510 bmap_to_share_mode(unsigned long bmap
) {
512 unsigned int access
= 0;
514 for (i
= 1; i
< 4; i
++) {
515 if (test_bit(i
, &bmap
))
522 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
523 unsigned int access
, deny
;
525 access
= bmap_to_share_mode(stp
->st_access_bmap
);
526 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
527 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
532 /* set share access for a given stateid */
534 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
536 __set_bit(access
, &stp
->st_access_bmap
);
539 /* clear share access for a given stateid */
541 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
543 __clear_bit(access
, &stp
->st_access_bmap
);
546 /* test whether a given stateid has access */
548 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
550 return test_bit(access
, &stp
->st_access_bmap
);
553 /* set share deny for a given stateid */
555 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
557 __set_bit(access
, &stp
->st_deny_bmap
);
560 /* clear share deny for a given stateid */
562 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
564 __clear_bit(access
, &stp
->st_deny_bmap
);
567 /* test whether a given stateid is denying specific access */
569 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
571 return test_bit(access
, &stp
->st_deny_bmap
);
574 static int nfs4_access_to_omode(u32 access
)
576 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
577 case NFS4_SHARE_ACCESS_READ
:
579 case NFS4_SHARE_ACCESS_WRITE
:
581 case NFS4_SHARE_ACCESS_BOTH
:
588 /* release all access and file references for a given stateid */
590 release_all_access(struct nfs4_ol_stateid
*stp
)
594 for (i
= 1; i
< 4; i
++) {
595 if (test_access(i
, stp
))
596 nfs4_file_put_access(stp
->st_file
,
597 nfs4_access_to_omode(i
));
598 clear_access(i
, stp
);
602 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
604 list_del(&stp
->st_perfile
);
605 list_del(&stp
->st_perstateowner
);
608 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
610 release_all_access(stp
);
611 put_nfs4_file(stp
->st_file
);
615 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
617 remove_stid(&stp
->st_stid
);
618 nfs4_free_stid(stateid_slab
, &stp
->st_stid
);
621 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
625 unhash_generic_stateid(stp
);
626 unhash_stid(&stp
->st_stid
);
627 file
= find_any_file(stp
->st_file
);
629 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
630 close_generic_stateid(stp
);
631 free_generic_stateid(stp
);
634 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
636 struct nfs4_ol_stateid
*stp
;
638 list_del(&lo
->lo_owner
.so_strhash
);
639 list_del(&lo
->lo_perstateid
);
640 list_del(&lo
->lo_owner_ino_hash
);
641 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
642 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
643 struct nfs4_ol_stateid
, st_perstateowner
);
644 release_lock_stateid(stp
);
648 static void release_lockowner(struct nfs4_lockowner
*lo
)
650 unhash_lockowner(lo
);
651 nfs4_free_lockowner(lo
);
655 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
657 struct nfs4_lockowner
*lo
;
659 while (!list_empty(&open_stp
->st_lockowners
)) {
660 lo
= list_entry(open_stp
->st_lockowners
.next
,
661 struct nfs4_lockowner
, lo_perstateid
);
662 release_lockowner(lo
);
666 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
668 unhash_generic_stateid(stp
);
669 release_stateid_lockowners(stp
);
670 close_generic_stateid(stp
);
673 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
675 unhash_open_stateid(stp
);
676 free_generic_stateid(stp
);
679 static void unhash_openowner(struct nfs4_openowner
*oo
)
681 struct nfs4_ol_stateid
*stp
;
683 list_del(&oo
->oo_owner
.so_strhash
);
684 list_del(&oo
->oo_perclient
);
685 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
686 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
687 struct nfs4_ol_stateid
, st_perstateowner
);
688 release_open_stateid(stp
);
692 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
694 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
697 free_generic_stateid(s
);
698 oo
->oo_last_closed_stid
= NULL
;
702 static void release_openowner(struct nfs4_openowner
*oo
)
704 unhash_openowner(oo
);
705 list_del(&oo
->oo_close_lru
);
706 release_last_closed_stateid(oo
);
707 nfs4_free_openowner(oo
);
711 hash_sessionid(struct nfs4_sessionid
*sessionid
)
713 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
715 return sid
->sequence
% SESSION_HASH_SIZE
;
720 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
722 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
723 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
727 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
733 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
734 * won't be used for replay.
736 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
738 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
740 if (nfserr
== nfserr_replay_me
)
743 if (!seqid_mutating_err(ntohl(nfserr
))) {
744 cstate
->replay_owner
= NULL
;
749 if (so
->so_is_open_owner
)
750 release_last_closed_stateid(openowner(so
));
756 gen_sessionid(struct nfsd4_session
*ses
)
758 struct nfs4_client
*clp
= ses
->se_client
;
759 struct nfsd4_sessionid
*sid
;
761 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
762 sid
->clientid
= clp
->cl_clientid
;
763 sid
->sequence
= current_sessionid
++;
768 * The protocol defines ca_maxresponssize_cached to include the size of
769 * the rpc header, but all we need to cache is the data starting after
770 * the end of the initial SEQUENCE operation--the rest we regenerate
771 * each time. Therefore we can advertise a ca_maxresponssize_cached
772 * value that is the number of bytes in our cache plus a few additional
773 * bytes. In order to stay on the safe side, and not promise more than
774 * we can cache, those additional bytes must be the minimum possible: 24
775 * bytes of rpc header (xid through accept state, with AUTH_NULL
776 * verifier), 12 for the compound header (with zero-length tag), and 44
777 * for the SEQUENCE op response:
779 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
782 free_session_slots(struct nfsd4_session
*ses
)
786 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
787 kfree(ses
->se_slots
[i
]);
791 * We don't actually need to cache the rpc and session headers, so we
792 * can allocate a little less for each slot:
794 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
798 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
801 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
802 return size
+ sizeof(struct nfsd4_slot
);
806 * XXX: If we run out of reserved DRC memory we could (up to a point)
807 * re-negotiate active sessions and reduce their slot usage to make
808 * room for new connections. For now we just fail the create session.
810 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
812 u32 slotsize
= slot_bytes(ca
);
813 u32 num
= ca
->maxreqs
;
816 spin_lock(&nfsd_drc_lock
);
817 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
818 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
819 num
= min_t(int, num
, avail
/ slotsize
);
820 nfsd_drc_mem_used
+= num
* slotsize
;
821 spin_unlock(&nfsd_drc_lock
);
826 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
828 int slotsize
= slot_bytes(ca
);
830 spin_lock(&nfsd_drc_lock
);
831 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
832 spin_unlock(&nfsd_drc_lock
);
835 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fattrs
,
836 struct nfsd4_channel_attrs
*battrs
)
838 int numslots
= fattrs
->maxreqs
;
839 int slotsize
= slot_bytes(fattrs
);
840 struct nfsd4_session
*new;
843 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
844 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
845 mem
= numslots
* sizeof(struct nfsd4_slot
*);
847 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
850 /* allocate each struct nfsd4_slot and data cache in one piece */
851 for (i
= 0; i
< numslots
; i
++) {
852 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
853 if (!new->se_slots
[i
])
857 memcpy(&new->se_fchannel
, fattrs
, sizeof(struct nfsd4_channel_attrs
));
858 memcpy(&new->se_bchannel
, battrs
, sizeof(struct nfsd4_channel_attrs
));
863 kfree(new->se_slots
[i
]);
868 static void free_conn(struct nfsd4_conn
*c
)
870 svc_xprt_put(c
->cn_xprt
);
874 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
876 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
877 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
879 spin_lock(&clp
->cl_lock
);
880 if (!list_empty(&c
->cn_persession
)) {
881 list_del(&c
->cn_persession
);
884 nfsd4_probe_callback(clp
);
885 spin_unlock(&clp
->cl_lock
);
888 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
890 struct nfsd4_conn
*conn
;
892 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
895 svc_xprt_get(rqstp
->rq_xprt
);
896 conn
->cn_xprt
= rqstp
->rq_xprt
;
897 conn
->cn_flags
= flags
;
898 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
902 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
904 conn
->cn_session
= ses
;
905 list_add(&conn
->cn_persession
, &ses
->se_conns
);
908 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
910 struct nfs4_client
*clp
= ses
->se_client
;
912 spin_lock(&clp
->cl_lock
);
913 __nfsd4_hash_conn(conn
, ses
);
914 spin_unlock(&clp
->cl_lock
);
917 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
919 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
920 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
923 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
927 nfsd4_hash_conn(conn
, ses
);
928 ret
= nfsd4_register_conn(conn
);
930 /* oops; xprt is already down: */
931 nfsd4_conn_lost(&conn
->cn_xpt_user
);
932 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
933 /* callback channel may be back up */
934 nfsd4_probe_callback(ses
->se_client
);
938 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
940 u32 dir
= NFS4_CDFC4_FORE
;
942 if (cses
->flags
& SESSION4_BACK_CHAN
)
943 dir
|= NFS4_CDFC4_BACK
;
944 return alloc_conn(rqstp
, dir
);
947 /* must be called under client_lock */
948 static void nfsd4_del_conns(struct nfsd4_session
*s
)
950 struct nfs4_client
*clp
= s
->se_client
;
951 struct nfsd4_conn
*c
;
953 spin_lock(&clp
->cl_lock
);
954 while (!list_empty(&s
->se_conns
)) {
955 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
956 list_del_init(&c
->cn_persession
);
957 spin_unlock(&clp
->cl_lock
);
959 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
962 spin_lock(&clp
->cl_lock
);
964 spin_unlock(&clp
->cl_lock
);
967 static void __free_session(struct nfsd4_session
*ses
)
969 free_session_slots(ses
);
973 static void free_session(struct nfsd4_session
*ses
)
975 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
977 lockdep_assert_held(&nn
->client_lock
);
978 nfsd4_del_conns(ses
);
979 nfsd4_put_drc_mem(&ses
->se_fchannel
);
983 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
986 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
988 new->se_client
= clp
;
991 INIT_LIST_HEAD(&new->se_conns
);
993 new->se_cb_seq_nr
= 1;
994 new->se_flags
= cses
->flags
;
995 new->se_cb_prog
= cses
->callback_prog
;
996 new->se_cb_sec
= cses
->cb_sec
;
997 atomic_set(&new->se_ref
, 0);
998 idx
= hash_sessionid(&new->se_sessionid
);
999 spin_lock(&nn
->client_lock
);
1000 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
1001 spin_lock(&clp
->cl_lock
);
1002 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
1003 spin_unlock(&clp
->cl_lock
);
1004 spin_unlock(&nn
->client_lock
);
1006 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1007 struct sockaddr
*sa
= svc_addr(rqstp
);
1009 * This is a little silly; with sessions there's no real
1010 * use for the callback address. Use the peer address
1011 * as a reasonable default for now, but consider fixing
1012 * the rpc client not to require an address in the
1015 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1016 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1020 /* caller must hold client_lock */
1021 static struct nfsd4_session
*
1022 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1024 struct nfsd4_session
*elem
;
1026 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1028 dump_sessionid(__func__
, sessionid
);
1029 idx
= hash_sessionid(sessionid
);
1030 /* Search in the appropriate list */
1031 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1032 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1033 NFS4_MAX_SESSIONID_LEN
)) {
1038 dprintk("%s: session not found\n", __func__
);
1042 /* caller must hold client_lock */
1044 unhash_session(struct nfsd4_session
*ses
)
1046 list_del(&ses
->se_hash
);
1047 spin_lock(&ses
->se_client
->cl_lock
);
1048 list_del(&ses
->se_perclnt
);
1049 spin_unlock(&ses
->se_client
->cl_lock
);
1052 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1054 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1056 if (clid
->cl_boot
== nn
->boot_time
)
1058 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1059 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1064 * XXX Should we use a slab cache ?
1065 * This type of memory management is somewhat inefficient, but we use it
1066 * anyway since SETCLIENTID is not a common operation.
1068 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1070 struct nfs4_client
*clp
;
1072 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1075 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1076 if (clp
->cl_name
.data
== NULL
) {
1080 clp
->cl_name
.len
= name
.len
;
1081 INIT_LIST_HEAD(&clp
->cl_sessions
);
1082 idr_init(&clp
->cl_stateids
);
1083 atomic_set(&clp
->cl_refcount
, 0);
1084 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1085 INIT_LIST_HEAD(&clp
->cl_idhash
);
1086 INIT_LIST_HEAD(&clp
->cl_openowners
);
1087 INIT_LIST_HEAD(&clp
->cl_delegations
);
1088 INIT_LIST_HEAD(&clp
->cl_lru
);
1089 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1090 INIT_LIST_HEAD(&clp
->cl_revoked
);
1091 spin_lock_init(&clp
->cl_lock
);
1092 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1097 free_client(struct nfs4_client
*clp
)
1099 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1101 lockdep_assert_held(&nn
->client_lock
);
1102 while (!list_empty(&clp
->cl_sessions
)) {
1103 struct nfsd4_session
*ses
;
1104 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1106 list_del(&ses
->se_perclnt
);
1107 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1110 rpc_destroy_wait_queue(&clp
->cl_cb_waitq
);
1111 free_svc_cred(&clp
->cl_cred
);
1112 kfree(clp
->cl_name
.data
);
1113 idr_destroy(&clp
->cl_stateids
);
1117 /* must be called under the client_lock */
1119 unhash_client_locked(struct nfs4_client
*clp
)
1121 struct nfsd4_session
*ses
;
1123 list_del(&clp
->cl_lru
);
1124 spin_lock(&clp
->cl_lock
);
1125 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1126 list_del_init(&ses
->se_hash
);
1127 spin_unlock(&clp
->cl_lock
);
1131 destroy_client(struct nfs4_client
*clp
)
1133 struct nfs4_openowner
*oo
;
1134 struct nfs4_delegation
*dp
;
1135 struct list_head reaplist
;
1136 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1138 INIT_LIST_HEAD(&reaplist
);
1139 spin_lock(&recall_lock
);
1140 while (!list_empty(&clp
->cl_delegations
)) {
1141 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1142 list_del_init(&dp
->dl_perclnt
);
1143 list_move(&dp
->dl_recall_lru
, &reaplist
);
1145 spin_unlock(&recall_lock
);
1146 while (!list_empty(&reaplist
)) {
1147 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1148 destroy_delegation(dp
);
1150 list_splice_init(&clp
->cl_revoked
, &reaplist
);
1151 while (!list_empty(&reaplist
)) {
1152 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1153 destroy_revoked_delegation(dp
);
1155 while (!list_empty(&clp
->cl_openowners
)) {
1156 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1157 release_openowner(oo
);
1159 nfsd4_shutdown_callback(clp
);
1160 if (clp
->cl_cb_conn
.cb_xprt
)
1161 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1162 list_del(&clp
->cl_idhash
);
1163 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1164 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1166 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1167 spin_lock(&nn
->client_lock
);
1168 unhash_client_locked(clp
);
1169 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1171 spin_unlock(&nn
->client_lock
);
1174 static void expire_client(struct nfs4_client
*clp
)
1176 nfsd4_client_record_remove(clp
);
1177 destroy_client(clp
);
1180 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1182 memcpy(target
->cl_verifier
.data
, source
->data
,
1183 sizeof(target
->cl_verifier
.data
));
1186 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1188 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1189 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1192 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1194 if (source
->cr_principal
) {
1195 target
->cr_principal
=
1196 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1197 if (target
->cr_principal
== NULL
)
1200 target
->cr_principal
= NULL
;
1201 target
->cr_flavor
= source
->cr_flavor
;
1202 target
->cr_uid
= source
->cr_uid
;
1203 target
->cr_gid
= source
->cr_gid
;
1204 target
->cr_group_info
= source
->cr_group_info
;
1205 get_group_info(target
->cr_group_info
);
1206 target
->cr_gss_mech
= source
->cr_gss_mech
;
1207 if (source
->cr_gss_mech
)
1208 gss_mech_get(source
->cr_gss_mech
);
1213 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1217 res
= o1
->len
- o2
->len
;
1220 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1223 static int same_name(const char *n1
, const char *n2
)
1225 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1229 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1231 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1235 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1237 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1240 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1244 if (g1
->ngroups
!= g2
->ngroups
)
1246 for (i
=0; i
<g1
->ngroups
; i
++)
1247 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1253 * RFC 3530 language requires clid_inuse be returned when the
1254 * "principal" associated with a requests differs from that previously
1255 * used. We use uid, gid's, and gss principal string as our best
1256 * approximation. We also don't want to allow non-gss use of a client
1257 * established using gss: in theory cr_principal should catch that
1258 * change, but in practice cr_principal can be null even in the gss case
1259 * since gssd doesn't always pass down a principal string.
1261 static bool is_gss_cred(struct svc_cred
*cr
)
1263 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1264 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1269 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1271 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1272 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1273 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1274 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1276 if (cr1
->cr_principal
== cr2
->cr_principal
)
1278 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1280 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1283 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1285 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1288 if (!cr
->cr_gss_mech
)
1290 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1291 return service
== RPC_GSS_SVC_INTEGRITY
||
1292 service
== RPC_GSS_SVC_PRIVACY
;
1295 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1297 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1299 if (!cl
->cl_mach_cred
)
1301 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1303 if (!svc_rqst_integrity_protected(rqstp
))
1305 if (!cr
->cr_principal
)
1307 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1310 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1312 static u32 current_clientid
= 1;
1314 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1315 clp
->cl_clientid
.cl_id
= current_clientid
++;
1318 static void gen_confirm(struct nfs4_client
*clp
)
1323 verf
[0] = (__be32
)get_seconds();
1324 verf
[1] = (__be32
)i
++;
1325 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1328 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1330 struct nfs4_stid
*ret
;
1332 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1333 if (!ret
|| !ret
->sc_type
)
1338 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1340 struct nfs4_stid
*s
;
1342 s
= find_stateid(cl
, t
);
1345 if (typemask
& s
->sc_type
)
1350 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1351 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1353 struct nfs4_client
*clp
;
1354 struct sockaddr
*sa
= svc_addr(rqstp
);
1356 struct net
*net
= SVC_NET(rqstp
);
1357 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1359 clp
= alloc_client(name
);
1363 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1365 spin_lock(&nn
->client_lock
);
1367 spin_unlock(&nn
->client_lock
);
1370 nfsd4_init_callback(&clp
->cl_cb_null
);
1371 clp
->cl_time
= get_seconds();
1372 clear_bit(0, &clp
->cl_cb_slot_busy
);
1373 copy_verf(clp
, verf
);
1374 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1376 clp
->cl_cb_session
= NULL
;
1382 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1384 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1385 struct nfs4_client
*clp
;
1388 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1391 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1392 new = &((*new)->rb_left
);
1394 new = &((*new)->rb_right
);
1397 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1398 rb_insert_color(&new_clp
->cl_namenode
, root
);
1401 static struct nfs4_client
*
1402 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1405 struct rb_node
*node
= root
->rb_node
;
1406 struct nfs4_client
*clp
;
1409 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1410 cmp
= compare_blob(&clp
->cl_name
, name
);
1412 node
= node
->rb_left
;
1414 node
= node
->rb_right
;
1422 add_to_unconfirmed(struct nfs4_client
*clp
)
1424 unsigned int idhashval
;
1425 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1427 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1428 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1429 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1430 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1435 move_to_confirmed(struct nfs4_client
*clp
)
1437 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1438 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1440 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1441 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1442 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1443 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1444 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1448 static struct nfs4_client
*
1449 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1451 struct nfs4_client
*clp
;
1452 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1454 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1455 if (same_clid(&clp
->cl_clientid
, clid
)) {
1456 if ((bool)clp
->cl_minorversion
!= sessions
)
1465 static struct nfs4_client
*
1466 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1468 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1470 return find_client_in_id_table(tbl
, clid
, sessions
);
1473 static struct nfs4_client
*
1474 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1476 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1478 return find_client_in_id_table(tbl
, clid
, sessions
);
1481 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1483 return clp
->cl_exchange_flags
!= 0;
1486 static struct nfs4_client
*
1487 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1489 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1492 static struct nfs4_client
*
1493 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1495 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1499 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1501 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1502 struct sockaddr
*sa
= svc_addr(rqstp
);
1503 u32 scopeid
= rpc_get_scope_id(sa
);
1504 unsigned short expected_family
;
1506 /* Currently, we only support tcp and tcp6 for the callback channel */
1507 if (se
->se_callback_netid_len
== 3 &&
1508 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1509 expected_family
= AF_INET
;
1510 else if (se
->se_callback_netid_len
== 4 &&
1511 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1512 expected_family
= AF_INET6
;
1516 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1517 se
->se_callback_addr_len
,
1518 (struct sockaddr
*)&conn
->cb_addr
,
1519 sizeof(conn
->cb_addr
));
1521 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1524 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1525 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1527 conn
->cb_prog
= se
->se_callback_prog
;
1528 conn
->cb_ident
= se
->se_callback_ident
;
1529 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1532 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1533 conn
->cb_addrlen
= 0;
1534 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1535 "will not receive delegations\n",
1536 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1542 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1545 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1547 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1550 dprintk("--> %s slot %p\n", __func__
, slot
);
1552 slot
->sl_opcnt
= resp
->opcnt
;
1553 slot
->sl_status
= resp
->cstate
.status
;
1555 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1556 if (nfsd4_not_cached(resp
)) {
1557 slot
->sl_datalen
= 0;
1560 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1561 base
= (char *)resp
->cstate
.datap
-
1562 (char *)resp
->xbuf
->head
[0].iov_base
;
1563 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1565 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1570 * Encode the replay sequence operation from the slot values.
1571 * If cachethis is FALSE encode the uncached rep error on the next
1572 * operation which sets resp->p and increments resp->opcnt for
1573 * nfs4svc_encode_compoundres.
1577 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1578 struct nfsd4_compoundres
*resp
)
1580 struct nfsd4_op
*op
;
1581 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1583 /* Encode the replayed sequence operation */
1584 op
= &args
->ops
[resp
->opcnt
- 1];
1585 nfsd4_encode_operation(resp
, op
);
1587 /* Return nfserr_retry_uncached_rep in next operation. */
1588 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1589 op
= &args
->ops
[resp
->opcnt
++];
1590 op
->status
= nfserr_retry_uncached_rep
;
1591 nfsd4_encode_operation(resp
, op
);
1597 * The sequence operation is not cached because we can use the slot and
1601 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1602 struct nfsd4_sequence
*seq
)
1604 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1607 dprintk("--> %s slot %p\n", __func__
, slot
);
1609 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1613 /* The sequence operation has been encoded, cstate->datap set. */
1614 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1616 resp
->opcnt
= slot
->sl_opcnt
;
1617 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1618 status
= slot
->sl_status
;
1624 * Set the exchange_id flags returned by the server.
1627 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1629 /* pNFS is not supported */
1630 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1632 /* Referrals are supported, Migration is not. */
1633 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1635 /* set the wire flags to return to client. */
1636 clid
->flags
= new->cl_exchange_flags
;
1639 static bool client_has_state(struct nfs4_client
*clp
)
1642 * Note clp->cl_openowners check isn't quite right: there's no
1643 * need to count owners without stateid's.
1645 * Also note we should probably be using this in 4.0 case too.
1647 return !list_empty(&clp
->cl_openowners
)
1648 || !list_empty(&clp
->cl_delegations
)
1649 || !list_empty(&clp
->cl_sessions
);
1653 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1654 struct nfsd4_compound_state
*cstate
,
1655 struct nfsd4_exchange_id
*exid
)
1657 struct nfs4_client
*unconf
, *conf
, *new;
1659 char addr_str
[INET6_ADDRSTRLEN
];
1660 nfs4_verifier verf
= exid
->verifier
;
1661 struct sockaddr
*sa
= svc_addr(rqstp
);
1662 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1663 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1665 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1666 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1667 "ip_addr=%s flags %x, spa_how %d\n",
1668 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1669 addr_str
, exid
->flags
, exid
->spa_how
);
1671 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1672 return nfserr_inval
;
1674 switch (exid
->spa_how
) {
1676 if (!svc_rqst_integrity_protected(rqstp
))
1677 return nfserr_inval
;
1680 default: /* checked by xdr code */
1683 return nfserr_encr_alg_unsupp
;
1686 /* Cases below refer to rfc 5661 section 18.35.4: */
1688 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1690 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1691 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1694 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1695 status
= nfserr_inval
;
1698 if (!mach_creds_match(conf
, rqstp
)) {
1699 status
= nfserr_wrong_cred
;
1702 if (!creds_match
) { /* case 9 */
1703 status
= nfserr_perm
;
1706 if (!verfs_match
) { /* case 8 */
1707 status
= nfserr_not_same
;
1711 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1715 if (!creds_match
) { /* case 3 */
1716 if (client_has_state(conf
)) {
1717 status
= nfserr_clid_inuse
;
1720 expire_client(conf
);
1723 if (verfs_match
) { /* case 2 */
1724 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1728 /* case 5, client reboot */
1732 if (update
) { /* case 7 */
1733 status
= nfserr_noent
;
1737 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1738 if (unconf
) /* case 4, possible retry or client restart */
1739 expire_client(unconf
);
1741 /* case 1 (normal case) */
1743 new = create_client(exid
->clname
, rqstp
, &verf
);
1745 status
= nfserr_jukebox
;
1748 new->cl_minorversion
= cstate
->minorversion
;
1749 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1752 add_to_unconfirmed(new);
1754 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1755 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1757 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1758 nfsd4_set_ex_flags(new, exid
);
1760 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1761 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1765 nfs4_unlock_state();
1770 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1772 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1775 /* The slot is in use, and no response has been sent. */
1777 if (seqid
== slot_seqid
)
1778 return nfserr_jukebox
;
1780 return nfserr_seq_misordered
;
1782 /* Note unsigned 32-bit arithmetic handles wraparound: */
1783 if (likely(seqid
== slot_seqid
+ 1))
1785 if (seqid
== slot_seqid
)
1786 return nfserr_replay_cache
;
1787 return nfserr_seq_misordered
;
1791 * Cache the create session result into the create session single DRC
1792 * slot cache by saving the xdr structure. sl_seqid has been set.
1793 * Do this for solo or embedded create session operations.
1796 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1797 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1799 slot
->sl_status
= nfserr
;
1800 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1804 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1805 struct nfsd4_clid_slot
*slot
)
1807 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1808 return slot
->sl_status
;
1811 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1812 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1813 1 + /* MIN tag is length with zero, only length */ \
1814 3 + /* version, opcount, opcode */ \
1815 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1816 /* seqid, slotID, slotID, cache */ \
1817 4 ) * sizeof(__be32))
1819 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1820 2 + /* verifier: AUTH_NULL, length 0 */\
1822 1 + /* MIN tag is length with zero, only length */ \
1823 3 + /* opcount, opcode, opstatus*/ \
1824 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1825 /* seqid, slotID, slotID, slotID, status */ \
1826 5 ) * sizeof(__be32))
1828 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1830 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1832 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1833 return nfserr_toosmall
;
1834 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1835 return nfserr_toosmall
;
1836 ca
->headerpadsz
= 0;
1837 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1838 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1839 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1840 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1841 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1842 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1844 * Note decreasing slot size below client's request may make it
1845 * difficult for client to function correctly, whereas
1846 * decreasing the number of slots will (just?) affect
1847 * performance. When short on memory we therefore prefer to
1848 * decrease number of slots instead of their size. Clients that
1849 * request larger slots than they need will get poor results:
1851 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1853 return nfserr_jukebox
;
1858 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
1859 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
1860 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
1861 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
1863 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1865 ca
->headerpadsz
= 0;
1868 * These RPC_MAX_HEADER macros are overkill, especially since we
1869 * don't even do gss on the backchannel yet. But this is still
1870 * less than 1k. Tighten up this estimate in the unlikely event
1871 * it turns out to be a problem for some client:
1873 if (ca
->maxreq_sz
< NFSD_CB_MAX_REQ_SZ
)
1874 return nfserr_toosmall
;
1875 if (ca
->maxresp_sz
< NFSD_CB_MAX_RESP_SZ
)
1876 return nfserr_toosmall
;
1877 ca
->maxresp_cached
= 0;
1879 return nfserr_toosmall
;
1884 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1886 switch (cbs
->flavor
) {
1892 * GSS case: the spec doesn't allow us to return this
1893 * error. But it also doesn't allow us not to support
1895 * I'd rather this fail hard than return some error the
1896 * client might think it can already handle:
1898 return nfserr_encr_alg_unsupp
;
1903 nfsd4_create_session(struct svc_rqst
*rqstp
,
1904 struct nfsd4_compound_state
*cstate
,
1905 struct nfsd4_create_session
*cr_ses
)
1907 struct sockaddr
*sa
= svc_addr(rqstp
);
1908 struct nfs4_client
*conf
, *unconf
;
1909 struct nfsd4_session
*new;
1910 struct nfsd4_conn
*conn
;
1911 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1913 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1915 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1916 return nfserr_inval
;
1917 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
1920 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1923 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1925 goto out_release_drc_mem
;
1926 status
= nfserr_jukebox
;
1927 new = alloc_session(&cr_ses
->fore_channel
, &cr_ses
->back_channel
);
1929 goto out_release_drc_mem
;
1930 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1932 goto out_free_session
;
1935 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1936 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1937 WARN_ON_ONCE(conf
&& unconf
);
1940 status
= nfserr_wrong_cred
;
1941 if (!mach_creds_match(conf
, rqstp
))
1943 cs_slot
= &conf
->cl_cs_slot
;
1944 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1945 if (status
== nfserr_replay_cache
) {
1946 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1948 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1949 status
= nfserr_seq_misordered
;
1952 } else if (unconf
) {
1953 struct nfs4_client
*old
;
1954 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1955 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1956 status
= nfserr_clid_inuse
;
1959 status
= nfserr_wrong_cred
;
1960 if (!mach_creds_match(unconf
, rqstp
))
1962 cs_slot
= &unconf
->cl_cs_slot
;
1963 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1965 /* an unconfirmed replay returns misordered */
1966 status
= nfserr_seq_misordered
;
1969 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1971 status
= mark_client_expired(old
);
1976 move_to_confirmed(unconf
);
1979 status
= nfserr_stale_clientid
;
1984 * We do not support RDMA or persistent sessions
1986 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1987 cr_ses
->flags
&= ~SESSION4_RDMA
;
1989 init_session(rqstp
, new, conf
, cr_ses
);
1990 nfsd4_init_conn(rqstp
, conn
, new);
1992 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1993 NFS4_MAX_SESSIONID_LEN
);
1994 cs_slot
->sl_seqid
++;
1995 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1997 /* cache solo and embedded create sessions under the state lock */
1998 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1999 nfs4_unlock_state();
2002 nfs4_unlock_state();
2005 __free_session(new);
2006 out_release_drc_mem
:
2007 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2011 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2014 case NFS4_CDFC4_FORE
:
2015 case NFS4_CDFC4_BACK
:
2017 case NFS4_CDFC4_FORE_OR_BOTH
:
2018 case NFS4_CDFC4_BACK_OR_BOTH
:
2019 *dir
= NFS4_CDFC4_BOTH
;
2022 return nfserr_inval
;
2025 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2027 struct nfsd4_session
*session
= cstate
->session
;
2028 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2031 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2034 spin_lock(&nn
->client_lock
);
2035 session
->se_cb_prog
= bc
->bc_cb_program
;
2036 session
->se_cb_sec
= bc
->bc_cb_sec
;
2037 spin_unlock(&nn
->client_lock
);
2039 nfsd4_probe_callback(session
->se_client
);
2044 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2045 struct nfsd4_compound_state
*cstate
,
2046 struct nfsd4_bind_conn_to_session
*bcts
)
2049 struct nfsd4_conn
*conn
;
2050 struct nfsd4_session
*session
;
2051 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2053 if (!nfsd4_last_compound_op(rqstp
))
2054 return nfserr_not_only_op
;
2056 spin_lock(&nn
->client_lock
);
2057 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2058 spin_unlock(&nn
->client_lock
);
2059 status
= nfserr_badsession
;
2062 status
= nfserr_wrong_cred
;
2063 if (!mach_creds_match(session
->se_client
, rqstp
))
2065 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2068 conn
= alloc_conn(rqstp
, bcts
->dir
);
2069 status
= nfserr_jukebox
;
2072 nfsd4_init_conn(rqstp
, conn
, session
);
2075 nfs4_unlock_state();
2079 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2083 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2087 nfsd4_destroy_session(struct svc_rqst
*r
,
2088 struct nfsd4_compound_state
*cstate
,
2089 struct nfsd4_destroy_session
*sessionid
)
2091 struct nfsd4_session
*ses
;
2093 int ref_held_by_me
= 0;
2094 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2097 status
= nfserr_not_only_op
;
2098 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2099 if (!nfsd4_last_compound_op(r
))
2103 dump_sessionid(__func__
, &sessionid
->sessionid
);
2104 spin_lock(&nn
->client_lock
);
2105 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2106 status
= nfserr_badsession
;
2108 goto out_client_lock
;
2109 status
= nfserr_wrong_cred
;
2110 if (!mach_creds_match(ses
->se_client
, r
))
2111 goto out_client_lock
;
2112 nfsd4_get_session_locked(ses
);
2113 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2115 goto out_put_session
;
2116 unhash_session(ses
);
2117 spin_unlock(&nn
->client_lock
);
2119 nfsd4_probe_callback_sync(ses
->se_client
);
2121 spin_lock(&nn
->client_lock
);
2124 nfsd4_put_session(ses
);
2126 spin_unlock(&nn
->client_lock
);
2128 nfs4_unlock_state();
2132 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2134 struct nfsd4_conn
*c
;
2136 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2137 if (c
->cn_xprt
== xpt
) {
2144 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2146 struct nfs4_client
*clp
= ses
->se_client
;
2147 struct nfsd4_conn
*c
;
2148 __be32 status
= nfs_ok
;
2151 spin_lock(&clp
->cl_lock
);
2152 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2155 status
= nfserr_conn_not_bound_to_session
;
2156 if (clp
->cl_mach_cred
)
2158 __nfsd4_hash_conn(new, ses
);
2159 spin_unlock(&clp
->cl_lock
);
2160 ret
= nfsd4_register_conn(new);
2162 /* oops; xprt is already down: */
2163 nfsd4_conn_lost(&new->cn_xpt_user
);
2166 spin_unlock(&clp
->cl_lock
);
2171 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2173 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2175 return args
->opcnt
> session
->se_fchannel
.maxops
;
2178 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2179 struct nfsd4_session
*session
)
2181 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2183 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2187 nfsd4_sequence(struct svc_rqst
*rqstp
,
2188 struct nfsd4_compound_state
*cstate
,
2189 struct nfsd4_sequence
*seq
)
2191 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2192 struct nfsd4_session
*session
;
2193 struct nfs4_client
*clp
;
2194 struct nfsd4_slot
*slot
;
2195 struct nfsd4_conn
*conn
;
2197 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2199 if (resp
->opcnt
!= 1)
2200 return nfserr_sequence_pos
;
2203 * Will be either used or freed by nfsd4_sequence_check_conn
2206 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2208 return nfserr_jukebox
;
2210 spin_lock(&nn
->client_lock
);
2211 status
= nfserr_badsession
;
2212 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2214 goto out_no_session
;
2215 clp
= session
->se_client
;
2216 status
= get_client_locked(clp
);
2218 goto out_no_session
;
2219 status
= nfsd4_get_session_locked(session
);
2221 goto out_put_client
;
2223 status
= nfserr_too_many_ops
;
2224 if (nfsd4_session_too_many_ops(rqstp
, session
))
2225 goto out_put_session
;
2227 status
= nfserr_req_too_big
;
2228 if (nfsd4_request_too_big(rqstp
, session
))
2229 goto out_put_session
;
2231 status
= nfserr_badslot
;
2232 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2233 goto out_put_session
;
2235 slot
= session
->se_slots
[seq
->slotid
];
2236 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2238 /* We do not negotiate the number of slots yet, so set the
2239 * maxslots to the session maxreqs which is used to encode
2240 * sr_highest_slotid and the sr_target_slot id to maxslots */
2241 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2243 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2244 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2245 if (status
== nfserr_replay_cache
) {
2246 status
= nfserr_seq_misordered
;
2247 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2248 goto out_put_session
;
2249 cstate
->slot
= slot
;
2250 cstate
->session
= session
;
2251 /* Return the cached reply status and set cstate->status
2252 * for nfsd4_proc_compound processing */
2253 status
= nfsd4_replay_cache_entry(resp
, seq
);
2254 cstate
->status
= nfserr_replay_cache
;
2258 goto out_put_session
;
2260 status
= nfsd4_sequence_check_conn(conn
, session
);
2263 goto out_put_session
;
2265 /* Success! bump slot seqid */
2266 slot
->sl_seqid
= seq
->seqid
;
2267 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2269 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2271 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2273 cstate
->slot
= slot
;
2274 cstate
->session
= session
;
2277 switch (clp
->cl_cb_state
) {
2279 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2281 case NFSD4_CB_FAULT
:
2282 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2285 seq
->status_flags
= 0;
2287 if (!list_empty(&clp
->cl_revoked
))
2288 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2292 spin_unlock(&nn
->client_lock
);
2295 nfsd4_put_session(session
);
2297 put_client_renew_locked(clp
);
2298 goto out_no_session
;
2302 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2304 struct nfs4_client
*conf
, *unconf
, *clp
;
2306 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2309 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2310 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2311 WARN_ON_ONCE(conf
&& unconf
);
2316 if (client_has_state(conf
)) {
2317 status
= nfserr_clientid_busy
;
2323 status
= nfserr_stale_clientid
;
2326 if (!mach_creds_match(clp
, rqstp
)) {
2327 status
= nfserr_wrong_cred
;
2332 nfs4_unlock_state();
2337 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2341 if (rc
->rca_one_fs
) {
2342 if (!cstate
->current_fh
.fh_dentry
)
2343 return nfserr_nofilehandle
;
2345 * We don't take advantage of the rca_one_fs case.
2346 * That's OK, it's optional, we can safely ignore it.
2352 status
= nfserr_complete_already
;
2353 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2354 &cstate
->session
->se_client
->cl_flags
))
2357 status
= nfserr_stale_clientid
;
2358 if (is_client_expired(cstate
->session
->se_client
))
2360 * The following error isn't really legal.
2361 * But we only get here if the client just explicitly
2362 * destroyed the client. Surely it no longer cares what
2363 * error it gets back on an operation for the dead
2369 nfsd4_client_record_create(cstate
->session
->se_client
);
2371 nfs4_unlock_state();
2376 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2377 struct nfsd4_setclientid
*setclid
)
2379 struct xdr_netobj clname
= setclid
->se_name
;
2380 nfs4_verifier clverifier
= setclid
->se_verf
;
2381 struct nfs4_client
*conf
, *unconf
, *new;
2383 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2385 /* Cases below refer to rfc 3530 section 14.2.33: */
2387 conf
= find_confirmed_client_by_name(&clname
, nn
);
2390 status
= nfserr_clid_inuse
;
2391 if (clp_used_exchangeid(conf
))
2393 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2394 char addr_str
[INET6_ADDRSTRLEN
];
2395 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2397 dprintk("NFSD: setclientid: string in use by client "
2398 "at %s\n", addr_str
);
2402 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2404 expire_client(unconf
);
2405 status
= nfserr_jukebox
;
2406 new = create_client(clname
, rqstp
, &clverifier
);
2409 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2410 /* case 1: probable callback update */
2411 copy_clid(new, conf
);
2412 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2414 new->cl_minorversion
= 0;
2415 gen_callback(new, setclid
, rqstp
);
2416 add_to_unconfirmed(new);
2417 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2418 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2419 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2422 nfs4_unlock_state();
2428 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2429 struct nfsd4_compound_state
*cstate
,
2430 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2432 struct nfs4_client
*conf
, *unconf
;
2433 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2434 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2436 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2438 if (STALE_CLIENTID(clid
, nn
))
2439 return nfserr_stale_clientid
;
2442 conf
= find_confirmed_client(clid
, false, nn
);
2443 unconf
= find_unconfirmed_client(clid
, false, nn
);
2445 * We try hard to give out unique clientid's, so if we get an
2446 * attempt to confirm the same clientid with a different cred,
2447 * there's a bug somewhere. Let's charitably assume it's our
2450 status
= nfserr_serverfault
;
2451 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2453 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2455 /* cases below refer to rfc 3530 section 14.2.34: */
2456 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2457 if (conf
&& !unconf
) /* case 2: probable retransmit */
2459 else /* case 4: client hasn't noticed we rebooted yet? */
2460 status
= nfserr_stale_clientid
;
2464 if (conf
) { /* case 1: callback update */
2465 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2466 nfsd4_probe_callback(conf
);
2467 expire_client(unconf
);
2468 } else { /* case 3: normal case; new or rebooted client */
2469 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2471 status
= mark_client_expired(conf
);
2474 expire_client(conf
);
2476 move_to_confirmed(unconf
);
2477 nfsd4_probe_callback(unconf
);
2480 nfs4_unlock_state();
2484 static struct nfs4_file
*nfsd4_alloc_file(void)
2486 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2489 /* OPEN Share state helper functions */
2490 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2492 unsigned int hashval
= file_hashval(ino
);
2494 atomic_set(&fp
->fi_ref
, 1);
2495 INIT_LIST_HEAD(&fp
->fi_stateids
);
2496 INIT_LIST_HEAD(&fp
->fi_delegations
);
2497 fp
->fi_inode
= igrab(ino
);
2498 fp
->fi_had_conflict
= false;
2499 fp
->fi_lease
= NULL
;
2500 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2501 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2502 spin_lock(&recall_lock
);
2503 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2504 spin_unlock(&recall_lock
);
2508 nfsd4_free_slab(struct kmem_cache
**slab
)
2512 kmem_cache_destroy(*slab
);
2517 nfsd4_free_slabs(void)
2519 nfsd4_free_slab(&openowner_slab
);
2520 nfsd4_free_slab(&lockowner_slab
);
2521 nfsd4_free_slab(&file_slab
);
2522 nfsd4_free_slab(&stateid_slab
);
2523 nfsd4_free_slab(&deleg_slab
);
2527 nfsd4_init_slabs(void)
2529 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2530 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2531 if (openowner_slab
== NULL
)
2533 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2534 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2535 if (lockowner_slab
== NULL
)
2537 file_slab
= kmem_cache_create("nfsd4_files",
2538 sizeof(struct nfs4_file
), 0, 0, NULL
);
2539 if (file_slab
== NULL
)
2541 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2542 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2543 if (stateid_slab
== NULL
)
2545 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2546 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2547 if (deleg_slab
== NULL
)
2552 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2556 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2558 kfree(oo
->oo_owner
.so_owner
.data
);
2559 kmem_cache_free(openowner_slab
, oo
);
2562 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2564 kfree(lo
->lo_owner
.so_owner
.data
);
2565 kmem_cache_free(lockowner_slab
, lo
);
2568 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2570 rp
->rp_status
= nfserr_serverfault
;
2572 rp
->rp_buf
= rp
->rp_ibuf
;
2575 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2577 struct nfs4_stateowner
*sop
;
2579 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2583 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2584 if (!sop
->so_owner
.data
) {
2585 kmem_cache_free(slab
, sop
);
2588 sop
->so_owner
.len
= owner
->len
;
2590 INIT_LIST_HEAD(&sop
->so_stateids
);
2591 sop
->so_client
= clp
;
2592 init_nfs4_replay(&sop
->so_replay
);
2596 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2598 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2600 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2601 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2604 static struct nfs4_openowner
*
2605 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2606 struct nfs4_openowner
*oo
;
2608 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2611 oo
->oo_owner
.so_is_open_owner
= 1;
2612 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2613 oo
->oo_flags
= NFS4_OO_NEW
;
2615 oo
->oo_last_closed_stid
= NULL
;
2616 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2617 hash_openowner(oo
, clp
, strhashval
);
2621 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2622 struct nfs4_openowner
*oo
= open
->op_openowner
;
2624 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2625 INIT_LIST_HEAD(&stp
->st_lockowners
);
2626 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2627 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2628 stp
->st_stateowner
= &oo
->oo_owner
;
2631 stp
->st_access_bmap
= 0;
2632 stp
->st_deny_bmap
= 0;
2633 set_access(open
->op_share_access
, stp
);
2634 set_deny(open
->op_share_deny
, stp
);
2635 stp
->st_openstp
= NULL
;
2639 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2641 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2643 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2645 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2646 oo
->oo_time
= get_seconds();
2650 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2653 return (sop
->so_owner
.len
== owner
->len
) &&
2654 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2655 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2658 static struct nfs4_openowner
*
2659 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2660 bool sessions
, struct nfsd_net
*nn
)
2662 struct nfs4_stateowner
*so
;
2663 struct nfs4_openowner
*oo
;
2664 struct nfs4_client
*clp
;
2666 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2667 if (!so
->so_is_open_owner
)
2669 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2671 clp
= oo
->oo_owner
.so_client
;
2672 if ((bool)clp
->cl_minorversion
!= sessions
)
2674 renew_client(oo
->oo_owner
.so_client
);
2681 /* search file_hashtbl[] for file */
2682 static struct nfs4_file
*
2683 find_file(struct inode
*ino
)
2685 unsigned int hashval
= file_hashval(ino
);
2686 struct nfs4_file
*fp
;
2688 spin_lock(&recall_lock
);
2689 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2690 if (fp
->fi_inode
== ino
) {
2692 spin_unlock(&recall_lock
);
2696 spin_unlock(&recall_lock
);
2701 * Called to check deny when READ with all zero stateid or
2702 * WRITE with all zero or all one stateid
2705 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2707 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2708 struct nfs4_file
*fp
;
2709 struct nfs4_ol_stateid
*stp
;
2712 fp
= find_file(ino
);
2715 ret
= nfserr_locked
;
2716 /* Search for conflicting share reservations */
2717 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2718 if (test_deny(deny_type
, stp
) ||
2719 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2728 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2730 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2731 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2733 /* We're assuming the state code never drops its reference
2734 * without first removing the lease. Since we're in this lease
2735 * callback (and since the lease code is serialized by the kernel
2736 * lock) we know the server hasn't removed the lease yet, we know
2737 * it's safe to take a reference: */
2738 atomic_inc(&dp
->dl_count
);
2740 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2742 /* Only place dl_time is set; protected by i_lock: */
2743 dp
->dl_time
= get_seconds();
2745 nfsd4_cb_recall(dp
);
2748 /* Called from break_lease() with i_lock held. */
2749 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2751 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2752 struct nfs4_delegation
*dp
;
2755 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2758 if (fp
->fi_had_conflict
) {
2759 WARN(1, "duplicate break on %p\n", fp
);
2763 * We don't want the locks code to timeout the lease for us;
2764 * we'll remove it ourself if a delegation isn't returned
2767 fl
->fl_break_time
= 0;
2769 spin_lock(&recall_lock
);
2770 fp
->fi_had_conflict
= true;
2771 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2772 nfsd_break_one_deleg(dp
);
2773 spin_unlock(&recall_lock
);
2777 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2780 return lease_modify(onlist
, arg
);
2785 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2786 .lm_break
= nfsd_break_deleg_cb
,
2787 .lm_change
= nfsd_change_deleg_cb
,
2790 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2792 if (nfsd4_has_session(cstate
))
2794 if (seqid
== so
->so_seqid
- 1)
2795 return nfserr_replay_me
;
2796 if (seqid
== so
->so_seqid
)
2798 return nfserr_bad_seqid
;
2802 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2803 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2805 clientid_t
*clientid
= &open
->op_clientid
;
2806 struct nfs4_client
*clp
= NULL
;
2807 unsigned int strhashval
;
2808 struct nfs4_openowner
*oo
= NULL
;
2811 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2812 return nfserr_stale_clientid
;
2814 * In case we need it later, after we've already created the
2815 * file and don't want to risk a further failure:
2817 open
->op_file
= nfsd4_alloc_file();
2818 if (open
->op_file
== NULL
)
2819 return nfserr_jukebox
;
2821 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2822 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2823 open
->op_openowner
= oo
;
2825 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2828 return nfserr_expired
;
2831 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2832 /* Replace unconfirmed owners without checking for replay. */
2833 clp
= oo
->oo_owner
.so_client
;
2834 release_openowner(oo
);
2835 open
->op_openowner
= NULL
;
2838 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2841 clp
= oo
->oo_owner
.so_client
;
2844 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2846 return nfserr_jukebox
;
2847 open
->op_openowner
= oo
;
2849 open
->op_stp
= nfs4_alloc_stateid(clp
);
2851 return nfserr_jukebox
;
2855 static inline __be32
2856 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2858 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2859 return nfserr_openmode
;
2864 static int share_access_to_flags(u32 share_access
)
2866 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2869 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2871 struct nfs4_stid
*ret
;
2873 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2876 return delegstateid(ret
);
2879 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2881 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2882 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2886 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2887 struct nfs4_delegation
**dp
)
2890 __be32 status
= nfserr_bad_stateid
;
2892 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2895 flags
= share_access_to_flags(open
->op_share_access
);
2896 status
= nfs4_check_delegmode(*dp
, flags
);
2900 if (!nfsd4_is_deleg_cur(open
))
2904 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2909 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2911 struct nfs4_ol_stateid
*local
;
2912 struct nfs4_openowner
*oo
= open
->op_openowner
;
2914 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2915 /* ignore lock owners */
2916 if (local
->st_stateowner
->so_is_open_owner
== 0)
2918 /* remember if we have seen this open owner */
2919 if (local
->st_stateowner
== &oo
->oo_owner
)
2921 /* check for conflicting share reservations */
2922 if (!test_share(local
, open
))
2923 return nfserr_share_denied
;
2928 static inline int nfs4_access_to_access(u32 nfs4_access
)
2932 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2933 flags
|= NFSD_MAY_READ
;
2934 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2935 flags
|= NFSD_MAY_WRITE
;
2939 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2940 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2943 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2944 int access
= nfs4_access_to_access(open
->op_share_access
);
2946 if (!fp
->fi_fds
[oflag
]) {
2947 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2948 &fp
->fi_fds
[oflag
]);
2952 nfs4_file_get_access(fp
, oflag
);
2957 static inline __be32
2958 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2959 struct nfsd4_open
*open
)
2961 struct iattr iattr
= {
2962 .ia_valid
= ATTR_SIZE
,
2965 if (!open
->op_truncate
)
2967 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2968 return nfserr_inval
;
2969 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2973 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
)
2975 u32 op_share_access
= open
->op_share_access
;
2979 new_access
= !test_access(op_share_access
, stp
);
2981 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2985 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2988 int oflag
= nfs4_access_to_omode(op_share_access
);
2989 nfs4_file_put_access(fp
, oflag
);
2993 /* remember the open */
2994 set_access(op_share_access
, stp
);
2995 set_deny(open
->op_share_deny
, stp
);
3002 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
3004 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3007 /* Should we give out recallable state?: */
3008 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3010 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3013 * In the sessions case, since we don't have to establish a
3014 * separate connection for callbacks, we assume it's OK
3015 * until we hear otherwise:
3017 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3020 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3022 struct file_lock
*fl
;
3024 fl
= locks_alloc_lock();
3027 locks_init_lock(fl
);
3028 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3029 fl
->fl_flags
= FL_DELEG
;
3030 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3031 fl
->fl_end
= OFFSET_MAX
;
3032 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3033 fl
->fl_pid
= current
->tgid
;
3037 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3039 struct nfs4_file
*fp
= dp
->dl_file
;
3040 struct file_lock
*fl
;
3043 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3046 fl
->fl_file
= find_readable_file(fp
);
3047 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3050 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3052 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3053 atomic_set(&fp
->fi_delegees
, 1);
3054 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3057 locks_free_lock(fl
);
3061 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
3065 if (fp
->fi_had_conflict
)
3069 if (!fp
->fi_lease
) {
3070 status
= nfs4_setlease(dp
);
3075 spin_lock(&recall_lock
);
3076 if (fp
->fi_had_conflict
) {
3077 spin_unlock(&recall_lock
);
3081 atomic_inc(&fp
->fi_delegees
);
3082 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3083 spin_unlock(&recall_lock
);
3084 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3092 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3094 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3095 if (status
== -EAGAIN
)
3096 open
->op_why_no_deleg
= WND4_CONTENTION
;
3098 open
->op_why_no_deleg
= WND4_RESOURCE
;
3099 switch (open
->op_deleg_want
) {
3100 case NFS4_SHARE_WANT_READ_DELEG
:
3101 case NFS4_SHARE_WANT_WRITE_DELEG
:
3102 case NFS4_SHARE_WANT_ANY_DELEG
:
3104 case NFS4_SHARE_WANT_CANCEL
:
3105 open
->op_why_no_deleg
= WND4_CANCELLED
;
3107 case NFS4_SHARE_WANT_NO_DELEG
:
3114 * Attempt to hand out a delegation.
3116 * Note we don't support write delegations, and won't until the vfs has
3117 * proper support for them.
3120 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3121 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3123 struct nfs4_delegation
*dp
;
3124 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3128 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3129 open
->op_recall
= 0;
3130 switch (open
->op_claim_type
) {
3131 case NFS4_OPEN_CLAIM_PREVIOUS
:
3133 open
->op_recall
= 1;
3134 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3137 case NFS4_OPEN_CLAIM_NULL
:
3138 case NFS4_OPEN_CLAIM_FH
:
3140 * Let's not give out any delegations till everyone's
3141 * had the chance to reclaim theirs....
3143 if (locks_in_grace(net
))
3145 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3148 * Also, if the file was opened for write or
3149 * create, there's a good chance the client's
3150 * about to write to it, resulting in an
3151 * immediate recall (since we don't support
3152 * write delegations):
3154 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3156 if (open
->op_create
== NFS4_OPEN_CREATE
)
3162 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3165 status
= nfs4_set_delegation(dp
, stp
->st_file
);
3169 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3171 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3172 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3173 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3176 remove_stid(&dp
->dl_stid
);
3177 nfs4_put_delegation(dp
);
3179 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3180 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3181 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3182 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3183 open
->op_recall
= 1;
3186 /* 4.1 client asking for a delegation? */
3187 if (open
->op_deleg_want
)
3188 nfsd4_open_deleg_none_ext(open
, status
);
3192 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3193 struct nfs4_delegation
*dp
)
3195 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3196 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3197 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3198 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3199 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3200 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3201 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3202 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3204 /* Otherwise the client must be confused wanting a delegation
3205 * it already has, therefore we don't return
3206 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3211 * called with nfs4_lock_state() held.
3214 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3216 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3217 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3218 struct nfs4_file
*fp
= NULL
;
3219 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3220 struct nfs4_ol_stateid
*stp
= NULL
;
3221 struct nfs4_delegation
*dp
= NULL
;
3225 * Lookup file; if found, lookup stateid and check open request,
3226 * and check for delegations in the process of being recalled.
3227 * If not found, create the nfs4_file struct
3229 fp
= find_file(ino
);
3231 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3233 status
= nfs4_check_deleg(cl
, open
, &dp
);
3237 status
= nfserr_bad_stateid
;
3238 if (nfsd4_is_deleg_cur(open
))
3240 status
= nfserr_jukebox
;
3242 open
->op_file
= NULL
;
3243 nfsd4_init_file(fp
, ino
);
3247 * OPEN the file, or upgrade an existing OPEN.
3248 * If truncate fails, the OPEN fails.
3251 /* Stateid was found, this is an OPEN upgrade */
3252 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3256 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3259 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3263 open
->op_stp
= NULL
;
3264 init_open_stateid(stp
, fp
, open
);
3266 update_stateid(&stp
->st_stid
.sc_stateid
);
3267 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3269 if (nfsd4_has_session(&resp
->cstate
)) {
3270 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3272 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3273 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3274 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3280 * Attempt to hand out a delegation. No error return, because the
3281 * OPEN succeeds even if we fail.
3283 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3287 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3288 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3290 /* 4.1 client trying to upgrade/downgrade delegation? */
3291 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3292 open
->op_deleg_want
)
3293 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3297 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3298 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3300 * To finish the open response, we just need to set the rflags.
3302 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3303 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3304 !nfsd4_has_session(&resp
->cstate
))
3305 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3310 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3312 if (open
->op_openowner
) {
3313 struct nfs4_openowner
*oo
= open
->op_openowner
;
3315 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3316 list_del_init(&oo
->oo_close_lru
);
3317 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3319 release_openowner(oo
);
3320 open
->op_openowner
= NULL
;
3322 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3326 nfsd4_free_file(open
->op_file
);
3328 free_generic_stateid(open
->op_stp
);
3331 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3333 struct nfs4_client
*found
;
3335 if (STALE_CLIENTID(clid
, nn
))
3336 return nfserr_stale_clientid
;
3337 found
= find_confirmed_client(clid
, session
, nn
);
3340 return found
? nfs_ok
: nfserr_expired
;
3344 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3347 struct nfs4_client
*clp
;
3349 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3352 dprintk("process_renew(%08x/%08x): starting\n",
3353 clid
->cl_boot
, clid
->cl_id
);
3354 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3357 status
= nfserr_cb_path_down
;
3358 if (!list_empty(&clp
->cl_delegations
)
3359 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3363 nfs4_unlock_state();
3368 nfsd4_end_grace(struct nfsd_net
*nn
)
3370 /* do nothing if grace period already ended */
3371 if (nn
->grace_ended
)
3374 dprintk("NFSD: end of grace period\n");
3375 nn
->grace_ended
= true;
3376 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3377 locks_end_grace(&nn
->nfsd4_manager
);
3379 * Now that every NFSv4 client has had the chance to recover and
3380 * to see the (possibly new, possibly shorter) lease time, we
3381 * can safely set the next grace time to the current lease time:
3383 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3387 nfs4_laundromat(struct nfsd_net
*nn
)
3389 struct nfs4_client
*clp
;
3390 struct nfs4_openowner
*oo
;
3391 struct nfs4_delegation
*dp
;
3392 struct list_head
*pos
, *next
, reaplist
;
3393 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3394 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3395 time_t u
, test_val
= nn
->nfsd4_lease
;
3399 dprintk("NFSD: laundromat service - starting\n");
3400 nfsd4_end_grace(nn
);
3401 INIT_LIST_HEAD(&reaplist
);
3402 spin_lock(&nn
->client_lock
);
3403 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3404 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3405 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3406 t
= clp
->cl_time
- cutoff
;
3407 if (clientid_val
> t
)
3411 if (mark_client_expired_locked(clp
)) {
3412 dprintk("NFSD: client in use (clientid %08x)\n",
3413 clp
->cl_clientid
.cl_id
);
3416 list_move(&clp
->cl_lru
, &reaplist
);
3418 spin_unlock(&nn
->client_lock
);
3419 list_for_each_safe(pos
, next
, &reaplist
) {
3420 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3421 dprintk("NFSD: purging unused client (clientid %08x)\n",
3422 clp
->cl_clientid
.cl_id
);
3425 spin_lock(&recall_lock
);
3426 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3427 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3428 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3430 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3431 u
= dp
->dl_time
- cutoff
;
3436 list_move(&dp
->dl_recall_lru
, &reaplist
);
3438 spin_unlock(&recall_lock
);
3439 list_for_each_safe(pos
, next
, &reaplist
) {
3440 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3441 revoke_delegation(dp
);
3443 test_val
= nn
->nfsd4_lease
;
3444 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3445 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3446 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3447 u
= oo
->oo_time
- cutoff
;
3452 release_openowner(oo
);
3454 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3455 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3456 nfs4_unlock_state();
3457 return clientid_val
;
3460 static struct workqueue_struct
*laundry_wq
;
3461 static void laundromat_main(struct work_struct
*);
3464 laundromat_main(struct work_struct
*laundry
)
3467 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3469 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3472 t
= nfs4_laundromat(nn
);
3473 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3474 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3477 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3479 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3480 return nfserr_bad_stateid
;
3485 access_permit_read(struct nfs4_ol_stateid
*stp
)
3487 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3488 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3489 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3493 access_permit_write(struct nfs4_ol_stateid
*stp
)
3495 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3496 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3500 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3502 __be32 status
= nfserr_openmode
;
3504 /* For lock stateid's, we test the parent open, not the lock: */
3505 if (stp
->st_openstp
)
3506 stp
= stp
->st_openstp
;
3507 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3509 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3516 static inline __be32
3517 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3519 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3521 else if (locks_in_grace(net
)) {
3522 /* Answer in remaining cases depends on existence of
3523 * conflicting state; so we must wait out the grace period. */
3524 return nfserr_grace
;
3525 } else if (flags
& WR_STATE
)
3526 return nfs4_share_conflict(current_fh
,
3527 NFS4_SHARE_DENY_WRITE
);
3528 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3529 return nfs4_share_conflict(current_fh
,
3530 NFS4_SHARE_DENY_READ
);
3534 * Allow READ/WRITE during grace period on recovered state only for files
3535 * that are not able to provide mandatory locking.
3538 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3540 return locks_in_grace(net
) && mandatory_lock(inode
);
3543 /* Returns true iff a is later than b: */
3544 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3546 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3549 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3552 * When sessions are used the stateid generation number is ignored
3555 if (has_session
&& in
->si_generation
== 0)
3558 if (in
->si_generation
== ref
->si_generation
)
3561 /* If the client sends us a stateid from the future, it's buggy: */
3562 if (stateid_generation_after(in
, ref
))
3563 return nfserr_bad_stateid
;
3565 * However, we could see a stateid from the past, even from a
3566 * non-buggy client. For example, if the client sends a lock
3567 * while some IO is outstanding, the lock may bump si_generation
3568 * while the IO is still in flight. The client could avoid that
3569 * situation by waiting for responses on all the IO requests,
3570 * but better performance may result in retrying IO that
3571 * receives an old_stateid error if requests are rarely
3572 * reordered in flight:
3574 return nfserr_old_stateid
;
3577 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3579 struct nfs4_stid
*s
;
3580 struct nfs4_ol_stateid
*ols
;
3583 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3584 return nfserr_bad_stateid
;
3585 /* Client debugging aid. */
3586 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3587 char addr_str
[INET6_ADDRSTRLEN
];
3588 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3590 pr_warn_ratelimited("NFSD: client %s testing state ID "
3591 "with incorrect client ID\n", addr_str
);
3592 return nfserr_bad_stateid
;
3594 s
= find_stateid(cl
, stateid
);
3596 return nfserr_bad_stateid
;
3597 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3600 switch (s
->sc_type
) {
3601 case NFS4_DELEG_STID
:
3603 case NFS4_REVOKED_DELEG_STID
:
3604 return nfserr_deleg_revoked
;
3605 case NFS4_OPEN_STID
:
3606 case NFS4_LOCK_STID
:
3607 ols
= openlockstateid(s
);
3608 if (ols
->st_stateowner
->so_is_open_owner
3609 && !(openowner(ols
->st_stateowner
)->oo_flags
3610 & NFS4_OO_CONFIRMED
))
3611 return nfserr_bad_stateid
;
3614 printk("unknown stateid type %x\n", s
->sc_type
);
3615 case NFS4_CLOSED_STID
:
3616 return nfserr_bad_stateid
;
3620 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3621 struct nfs4_stid
**s
, bool sessions
,
3622 struct nfsd_net
*nn
)
3624 struct nfs4_client
*cl
;
3627 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3628 return nfserr_bad_stateid
;
3629 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3631 if (status
== nfserr_stale_clientid
) {
3633 return nfserr_bad_stateid
;
3634 return nfserr_stale_stateid
;
3638 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3640 return nfserr_bad_stateid
;
3645 * Checks for stateid operations
3648 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3649 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3651 struct nfs4_stid
*s
;
3652 struct nfs4_ol_stateid
*stp
= NULL
;
3653 struct nfs4_delegation
*dp
= NULL
;
3654 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3655 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3656 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3662 if (grace_disallows_io(net
, ino
))
3663 return nfserr_grace
;
3665 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3666 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3668 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3669 &s
, cstate
->minorversion
, nn
);
3672 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3675 switch (s
->sc_type
) {
3676 case NFS4_DELEG_STID
:
3677 dp
= delegstateid(s
);
3678 status
= nfs4_check_delegmode(dp
, flags
);
3682 *filpp
= dp
->dl_file
->fi_deleg_file
;
3685 status
= nfserr_serverfault
;
3690 case NFS4_OPEN_STID
:
3691 case NFS4_LOCK_STID
:
3692 stp
= openlockstateid(s
);
3693 status
= nfs4_check_fh(current_fh
, stp
);
3696 if (stp
->st_stateowner
->so_is_open_owner
3697 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3699 status
= nfs4_check_openmode(stp
, flags
);
3703 if (flags
& RD_STATE
)
3704 *filpp
= find_readable_file(stp
->st_file
);
3706 *filpp
= find_writeable_file(stp
->st_file
);
3710 return nfserr_bad_stateid
;
3718 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3720 struct nfs4_lockowner
*lo
= lockowner(stp
->st_stateowner
);
3722 if (check_for_locks(stp
->st_file
, lo
))
3723 return nfserr_locks_held
;
3725 * Currently there's a 1-1 lock stateid<->lockowner
3726 * correspondance, and we have to delete the lockowner when we
3727 * delete the lock stateid:
3729 unhash_lockowner(lo
);
3734 * Test if the stateid is valid
3737 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3738 struct nfsd4_test_stateid
*test_stateid
)
3740 struct nfsd4_test_stateid_id
*stateid
;
3741 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3744 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3745 stateid
->ts_id_status
=
3746 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3747 nfs4_unlock_state();
3753 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3754 struct nfsd4_free_stateid
*free_stateid
)
3756 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3757 struct nfs4_stid
*s
;
3758 struct nfs4_delegation
*dp
;
3759 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3760 __be32 ret
= nfserr_bad_stateid
;
3763 s
= find_stateid(cl
, stateid
);
3766 switch (s
->sc_type
) {
3767 case NFS4_DELEG_STID
:
3768 ret
= nfserr_locks_held
;
3770 case NFS4_OPEN_STID
:
3771 case NFS4_LOCK_STID
:
3772 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3775 if (s
->sc_type
== NFS4_LOCK_STID
)
3776 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3778 ret
= nfserr_locks_held
;
3780 case NFS4_REVOKED_DELEG_STID
:
3781 dp
= delegstateid(s
);
3782 destroy_revoked_delegation(dp
);
3786 ret
= nfserr_bad_stateid
;
3789 nfs4_unlock_state();
3796 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3797 RD_STATE
: WR_STATE
;
3800 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3802 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3803 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3806 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3809 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3810 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3812 * "Closed" stateid's exist *only* to return
3813 * nfserr_replay_me from the previous step, and
3814 * revoked delegations are kept only for free_stateid.
3816 return nfserr_bad_stateid
;
3817 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3820 return nfs4_check_fh(current_fh
, stp
);
3824 * Checks for sequence id mutating operations.
3827 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3828 stateid_t
*stateid
, char typemask
,
3829 struct nfs4_ol_stateid
**stpp
,
3830 struct nfsd_net
*nn
)
3833 struct nfs4_stid
*s
;
3835 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3836 seqid
, STATEID_VAL(stateid
));
3839 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3840 cstate
->minorversion
, nn
);
3843 *stpp
= openlockstateid(s
);
3844 if (!nfsd4_has_session(cstate
))
3845 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3847 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3850 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3851 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3854 struct nfs4_openowner
*oo
;
3856 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3857 NFS4_OPEN_STID
, stpp
, nn
);
3860 oo
= openowner((*stpp
)->st_stateowner
);
3861 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3862 return nfserr_bad_stateid
;
3867 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3868 struct nfsd4_open_confirm
*oc
)
3871 struct nfs4_openowner
*oo
;
3872 struct nfs4_ol_stateid
*stp
;
3873 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3875 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3876 cstate
->current_fh
.fh_dentry
);
3878 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3884 status
= nfs4_preprocess_seqid_op(cstate
,
3885 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3886 NFS4_OPEN_STID
, &stp
, nn
);
3889 oo
= openowner(stp
->st_stateowner
);
3890 status
= nfserr_bad_stateid
;
3891 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3893 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3894 update_stateid(&stp
->st_stid
.sc_stateid
);
3895 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3896 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3897 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3899 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3902 nfsd4_bump_seqid(cstate
, status
);
3903 if (!cstate
->replay_owner
)
3904 nfs4_unlock_state();
3908 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3910 if (!test_access(access
, stp
))
3912 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3913 clear_access(access
, stp
);
3916 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3918 switch (to_access
) {
3919 case NFS4_SHARE_ACCESS_READ
:
3920 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3921 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3923 case NFS4_SHARE_ACCESS_WRITE
:
3924 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3925 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3927 case NFS4_SHARE_ACCESS_BOTH
:
3935 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3938 for (i
= 0; i
< 4; i
++) {
3939 if ((i
& deny
) != i
)
3945 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3946 struct nfsd4_compound_state
*cstate
,
3947 struct nfsd4_open_downgrade
*od
)
3950 struct nfs4_ol_stateid
*stp
;
3951 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3953 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
3954 cstate
->current_fh
.fh_dentry
);
3956 /* We don't yet support WANT bits: */
3957 if (od
->od_deleg_want
)
3958 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3962 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3963 &od
->od_stateid
, &stp
, nn
);
3966 status
= nfserr_inval
;
3967 if (!test_access(od
->od_share_access
, stp
)) {
3968 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3969 stp
->st_access_bmap
, od
->od_share_access
);
3972 if (!test_deny(od
->od_share_deny
, stp
)) {
3973 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3974 stp
->st_deny_bmap
, od
->od_share_deny
);
3977 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3979 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3981 update_stateid(&stp
->st_stid
.sc_stateid
);
3982 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3985 nfsd4_bump_seqid(cstate
, status
);
3986 if (!cstate
->replay_owner
)
3987 nfs4_unlock_state();
3991 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3993 unhash_open_stateid(s
);
3994 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3998 * nfs4_unlock_state() called after encode
4001 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4002 struct nfsd4_close
*close
)
4005 struct nfs4_openowner
*oo
;
4006 struct nfs4_ol_stateid
*stp
;
4007 struct net
*net
= SVC_NET(rqstp
);
4008 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4010 dprintk("NFSD: nfsd4_close on file %pd\n",
4011 cstate
->current_fh
.fh_dentry
);
4014 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
4016 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
4018 nfsd4_bump_seqid(cstate
, status
);
4021 oo
= openowner(stp
->st_stateowner
);
4022 update_stateid(&stp
->st_stid
.sc_stateid
);
4023 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4025 nfsd4_close_open_stateid(stp
);
4027 if (cstate
->minorversion
)
4028 free_generic_stateid(stp
);
4030 oo
->oo_last_closed_stid
= stp
;
4032 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
4033 if (cstate
->minorversion
)
4034 release_openowner(oo
);
4037 * In the 4.0 case we need to keep the owners around a
4038 * little while to handle CLOSE replay.
4040 move_to_close_lru(oo
, SVC_NET(rqstp
));
4044 if (!cstate
->replay_owner
)
4045 nfs4_unlock_state();
4050 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4051 struct nfsd4_delegreturn
*dr
)
4053 struct nfs4_delegation
*dp
;
4054 stateid_t
*stateid
= &dr
->dr_stateid
;
4055 struct nfs4_stid
*s
;
4057 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4059 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4063 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4064 cstate
->minorversion
, nn
);
4067 dp
= delegstateid(s
);
4068 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4072 destroy_delegation(dp
);
4074 nfs4_unlock_state();
4080 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4082 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4085 end_offset(u64 start
, u64 len
)
4090 return end
>= start
? end
: NFS4_MAX_UINT64
;
4093 /* last octet in a range */
4095 last_byte_offset(u64 start
, u64 len
)
4101 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4104 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4106 return (file_hashval(inode
) + cl_id
4107 + opaque_hashval(ownername
->data
, ownername
->len
))
4108 & LOCKOWNER_INO_HASH_MASK
;
4112 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4113 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4114 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4115 * locking, this prevents us from being completely protocol-compliant. The
4116 * real solution to this problem is to start using unsigned file offsets in
4117 * the VFS, but this is a very deep change!
4120 nfs4_transform_lock_offset(struct file_lock
*lock
)
4122 if (lock
->fl_start
< 0)
4123 lock
->fl_start
= OFFSET_MAX
;
4124 if (lock
->fl_end
< 0)
4125 lock
->fl_end
= OFFSET_MAX
;
4128 /* Hack!: For now, we're defining this just so we can use a pointer to it
4129 * as a unique cookie to identify our (NFSv4's) posix locks. */
4130 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4134 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4136 struct nfs4_lockowner
*lo
;
4138 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4139 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4140 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4141 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4142 if (!deny
->ld_owner
.data
)
4143 /* We just don't care that much */
4145 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4146 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4149 deny
->ld_owner
.len
= 0;
4150 deny
->ld_owner
.data
= NULL
;
4151 deny
->ld_clientid
.cl_boot
= 0;
4152 deny
->ld_clientid
.cl_id
= 0;
4154 deny
->ld_start
= fl
->fl_start
;
4155 deny
->ld_length
= NFS4_MAX_UINT64
;
4156 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4157 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4158 deny
->ld_type
= NFS4_READ_LT
;
4159 if (fl
->fl_type
!= F_RDLCK
)
4160 deny
->ld_type
= NFS4_WRITE_LT
;
4163 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4165 struct nfs4_ol_stateid
*lst
;
4167 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4169 if (list_empty(&lo
->lo_owner
.so_stateids
)) {
4173 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4174 struct nfs4_ol_stateid
, st_perstateowner
);
4175 return lst
->st_file
->fi_inode
== inode
;
4178 static struct nfs4_lockowner
*
4179 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4180 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4182 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4183 struct nfs4_lockowner
*lo
;
4185 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4186 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4192 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4194 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4195 unsigned int inohash
= lockowner_ino_hashval(inode
,
4196 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4197 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4199 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4200 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4201 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4205 * Alloc a lock owner structure.
4206 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4209 * strhashval = ownerstr_hashval
4212 static struct nfs4_lockowner
*
4213 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4214 struct nfs4_lockowner
*lo
;
4216 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4219 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4220 lo
->lo_owner
.so_is_open_owner
= 0;
4221 /* It is the openowner seqid that will be incremented in encode in the
4222 * case of new lockowners; so increment the lock seqid manually: */
4223 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4224 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4228 static struct nfs4_ol_stateid
*
4229 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4231 struct nfs4_ol_stateid
*stp
;
4232 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4234 stp
= nfs4_alloc_stateid(clp
);
4237 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4238 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4239 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4240 stp
->st_stateowner
= &lo
->lo_owner
;
4243 stp
->st_access_bmap
= 0;
4244 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4245 stp
->st_openstp
= open_stp
;
4250 check_lock_length(u64 offset
, u64 length
)
4252 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4253 LOFF_OVERFLOW(offset
, length
)));
4256 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4258 struct nfs4_file
*fp
= lock_stp
->st_file
;
4259 int oflag
= nfs4_access_to_omode(access
);
4261 if (test_access(access
, lock_stp
))
4263 nfs4_file_get_access(fp
, oflag
);
4264 set_access(access
, lock_stp
);
4267 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)
4269 struct nfs4_file
*fi
= ost
->st_file
;
4270 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4271 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4272 struct nfs4_lockowner
*lo
;
4273 unsigned int strhashval
;
4274 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4276 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4277 &lock
->v
.new.owner
, nn
);
4279 if (!cstate
->minorversion
)
4280 return nfserr_bad_seqid
;
4281 /* XXX: a lockowner always has exactly one stateid: */
4282 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4283 struct nfs4_ol_stateid
, st_perstateowner
);
4286 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4287 &lock
->v
.new.owner
);
4288 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4290 return nfserr_jukebox
;
4291 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4293 release_lockowner(lo
);
4294 return nfserr_jukebox
;
4304 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4305 struct nfsd4_lock
*lock
)
4307 struct nfs4_openowner
*open_sop
= NULL
;
4308 struct nfs4_lockowner
*lock_sop
= NULL
;
4309 struct nfs4_ol_stateid
*lock_stp
;
4310 struct file
*filp
= NULL
;
4311 struct file_lock
*file_lock
= NULL
;
4312 struct file_lock
*conflock
= NULL
;
4314 bool new_state
= false;
4317 struct net
*net
= SVC_NET(rqstp
);
4318 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4320 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4321 (long long) lock
->lk_offset
,
4322 (long long) lock
->lk_length
);
4324 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4325 return nfserr_inval
;
4327 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4328 S_IFREG
, NFSD_MAY_LOCK
))) {
4329 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4335 if (lock
->lk_is_new
) {
4336 struct nfs4_ol_stateid
*open_stp
= NULL
;
4338 if (nfsd4_has_session(cstate
))
4339 /* See rfc 5661 18.10.3: given clientid is ignored: */
4340 memcpy(&lock
->v
.new.clientid
,
4341 &cstate
->session
->se_client
->cl_clientid
,
4342 sizeof(clientid_t
));
4344 status
= nfserr_stale_clientid
;
4345 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4348 /* validate and update open stateid and open seqid */
4349 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4350 lock
->lk_new_open_seqid
,
4351 &lock
->lk_new_open_stateid
,
4355 open_sop
= openowner(open_stp
->st_stateowner
);
4356 status
= nfserr_bad_stateid
;
4357 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4358 &lock
->v
.new.clientid
))
4360 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4361 &lock_stp
, &new_state
);
4363 status
= nfs4_preprocess_seqid_op(cstate
,
4364 lock
->lk_old_lock_seqid
,
4365 &lock
->lk_old_lock_stateid
,
4366 NFS4_LOCK_STID
, &lock_stp
, nn
);
4369 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4371 lkflg
= setlkflg(lock
->lk_type
);
4372 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4376 status
= nfserr_grace
;
4377 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4379 status
= nfserr_no_grace
;
4380 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4383 file_lock
= locks_alloc_lock();
4385 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4386 status
= nfserr_jukebox
;
4390 locks_init_lock(file_lock
);
4391 switch (lock
->lk_type
) {
4394 filp
= find_readable_file(lock_stp
->st_file
);
4396 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4397 file_lock
->fl_type
= F_RDLCK
;
4400 case NFS4_WRITEW_LT
:
4401 filp
= find_writeable_file(lock_stp
->st_file
);
4403 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4404 file_lock
->fl_type
= F_WRLCK
;
4407 status
= nfserr_inval
;
4411 status
= nfserr_openmode
;
4414 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4415 file_lock
->fl_pid
= current
->tgid
;
4416 file_lock
->fl_file
= filp
;
4417 file_lock
->fl_flags
= FL_POSIX
;
4418 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4419 file_lock
->fl_start
= lock
->lk_offset
;
4420 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4421 nfs4_transform_lock_offset(file_lock
);
4423 conflock
= locks_alloc_lock();
4425 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4426 status
= nfserr_jukebox
;
4430 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4432 case 0: /* success! */
4433 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4434 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4438 case (EAGAIN
): /* conflock holds conflicting lock */
4439 status
= nfserr_denied
;
4440 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4441 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4444 status
= nfserr_deadlock
;
4447 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4448 status
= nfserrno(err
);
4452 if (status
&& new_state
)
4453 release_lockowner(lock_sop
);
4454 nfsd4_bump_seqid(cstate
, status
);
4455 if (!cstate
->replay_owner
)
4456 nfs4_unlock_state();
4458 locks_free_lock(file_lock
);
4460 locks_free_lock(conflock
);
4465 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4466 * so we do a temporary open here just to get an open file to pass to
4467 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4470 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4473 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4475 err
= nfserrno(vfs_test_lock(file
, lock
));
4485 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4486 struct nfsd4_lockt
*lockt
)
4488 struct inode
*inode
;
4489 struct file_lock
*file_lock
= NULL
;
4490 struct nfs4_lockowner
*lo
;
4492 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4494 if (locks_in_grace(SVC_NET(rqstp
)))
4495 return nfserr_grace
;
4497 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4498 return nfserr_inval
;
4502 if (!nfsd4_has_session(cstate
)) {
4503 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4508 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4511 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4512 file_lock
= locks_alloc_lock();
4514 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4515 status
= nfserr_jukebox
;
4518 locks_init_lock(file_lock
);
4519 switch (lockt
->lt_type
) {
4522 file_lock
->fl_type
= F_RDLCK
;
4525 case NFS4_WRITEW_LT
:
4526 file_lock
->fl_type
= F_WRLCK
;
4529 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4530 status
= nfserr_inval
;
4534 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4536 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4537 file_lock
->fl_pid
= current
->tgid
;
4538 file_lock
->fl_flags
= FL_POSIX
;
4540 file_lock
->fl_start
= lockt
->lt_offset
;
4541 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4543 nfs4_transform_lock_offset(file_lock
);
4545 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4549 if (file_lock
->fl_type
!= F_UNLCK
) {
4550 status
= nfserr_denied
;
4551 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4554 nfs4_unlock_state();
4556 locks_free_lock(file_lock
);
4561 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4562 struct nfsd4_locku
*locku
)
4564 struct nfs4_ol_stateid
*stp
;
4565 struct file
*filp
= NULL
;
4566 struct file_lock
*file_lock
= NULL
;
4569 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4571 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4572 (long long) locku
->lu_offset
,
4573 (long long) locku
->lu_length
);
4575 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4576 return nfserr_inval
;
4580 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4581 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4585 filp
= find_any_file(stp
->st_file
);
4587 status
= nfserr_lock_range
;
4590 file_lock
= locks_alloc_lock();
4592 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4593 status
= nfserr_jukebox
;
4596 locks_init_lock(file_lock
);
4597 file_lock
->fl_type
= F_UNLCK
;
4598 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4599 file_lock
->fl_pid
= current
->tgid
;
4600 file_lock
->fl_file
= filp
;
4601 file_lock
->fl_flags
= FL_POSIX
;
4602 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4603 file_lock
->fl_start
= locku
->lu_offset
;
4605 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4607 nfs4_transform_lock_offset(file_lock
);
4609 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4611 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4614 update_stateid(&stp
->st_stid
.sc_stateid
);
4615 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4618 nfsd4_bump_seqid(cstate
, status
);
4619 if (!cstate
->replay_owner
)
4620 nfs4_unlock_state();
4622 locks_free_lock(file_lock
);
4626 status
= nfserrno(err
);
4632 * 1: locks held by lockowner
4633 * 0: no locks held by lockowner
4636 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4638 struct file_lock
**flpp
;
4639 struct inode
*inode
= filp
->fi_inode
;
4642 spin_lock(&inode
->i_lock
);
4643 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4644 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4650 spin_unlock(&inode
->i_lock
);
4655 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4656 struct nfsd4_compound_state
*cstate
,
4657 struct nfsd4_release_lockowner
*rlockowner
)
4659 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4660 struct nfs4_stateowner
*sop
;
4661 struct nfs4_lockowner
*lo
;
4662 struct nfs4_ol_stateid
*stp
;
4663 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4664 struct list_head matches
;
4665 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4667 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4669 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4670 clid
->cl_boot
, clid
->cl_id
);
4674 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4678 status
= nfserr_locks_held
;
4679 INIT_LIST_HEAD(&matches
);
4681 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4682 if (sop
->so_is_open_owner
)
4684 if (!same_owner_str(sop
, owner
, clid
))
4686 list_for_each_entry(stp
, &sop
->so_stateids
,
4688 lo
= lockowner(sop
);
4689 if (check_for_locks(stp
->st_file
, lo
))
4691 list_add(&lo
->lo_list
, &matches
);
4694 /* Clients probably won't expect us to return with some (but not all)
4695 * of the lockowner state released; so don't release any until all
4696 * have been checked. */
4698 while (!list_empty(&matches
)) {
4699 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4701 /* unhash_stateowner deletes so_perclient only
4702 * for openowners. */
4703 list_del(&lo
->lo_list
);
4704 release_lockowner(lo
);
4707 nfs4_unlock_state();
4711 static inline struct nfs4_client_reclaim
*
4714 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4718 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4720 struct nfs4_client_reclaim
*crp
;
4722 crp
= nfsd4_find_reclaim_client(name
, nn
);
4723 return (crp
&& crp
->cr_clp
);
4727 * failure => all reset bets are off, nfserr_no_grace...
4729 struct nfs4_client_reclaim
*
4730 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4732 unsigned int strhashval
;
4733 struct nfs4_client_reclaim
*crp
;
4735 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4736 crp
= alloc_reclaim();
4738 strhashval
= clientstr_hashval(name
);
4739 INIT_LIST_HEAD(&crp
->cr_strhash
);
4740 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4741 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4743 nn
->reclaim_str_hashtbl_size
++;
4749 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4751 list_del(&crp
->cr_strhash
);
4753 nn
->reclaim_str_hashtbl_size
--;
4757 nfs4_release_reclaim(struct nfsd_net
*nn
)
4759 struct nfs4_client_reclaim
*crp
= NULL
;
4762 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4763 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4764 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4765 struct nfs4_client_reclaim
, cr_strhash
);
4766 nfs4_remove_reclaim_record(crp
, nn
);
4769 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4773 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4774 struct nfs4_client_reclaim
*
4775 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4777 unsigned int strhashval
;
4778 struct nfs4_client_reclaim
*crp
= NULL
;
4780 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4782 strhashval
= clientstr_hashval(recdir
);
4783 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4784 if (same_name(crp
->cr_recdir
, recdir
)) {
4792 * Called from OPEN. Look for clientid in reclaim list.
4795 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4797 struct nfs4_client
*clp
;
4799 /* find clientid in conf_id_hashtbl */
4800 clp
= find_confirmed_client(clid
, sessions
, nn
);
4802 return nfserr_reclaim_bad
;
4804 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4807 #ifdef CONFIG_NFSD_FAULT_INJECTION
4809 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4811 if (mark_client_expired(clp
))
4817 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4819 char buf
[INET6_ADDRSTRLEN
];
4820 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4821 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4825 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4828 char buf
[INET6_ADDRSTRLEN
];
4829 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4830 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4833 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4835 struct nfs4_openowner
*oop
;
4836 struct nfs4_lockowner
*lop
, *lo_next
;
4837 struct nfs4_ol_stateid
*stp
, *st_next
;
4840 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4841 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4842 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4854 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4856 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4859 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4861 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4862 nfsd_print_count(clp
, count
, "locked files");
4866 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4868 struct nfs4_openowner
*oop
, *next
;
4871 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4881 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4883 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4886 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4888 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4889 nfsd_print_count(clp
, count
, "open files");
4893 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4894 struct list_head
*victims
)
4896 struct nfs4_delegation
*dp
, *next
;
4899 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4901 list_move(&dp
->dl_recall_lru
, victims
);
4908 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4910 struct nfs4_delegation
*dp
, *next
;
4914 spin_lock(&recall_lock
);
4915 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4916 spin_unlock(&recall_lock
);
4918 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4919 revoke_delegation(dp
);
4924 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4926 struct nfs4_delegation
*dp
, *next
;
4930 spin_lock(&recall_lock
);
4931 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4932 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4933 nfsd_break_one_deleg(dp
);
4934 spin_unlock(&recall_lock
);
4939 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4943 spin_lock(&recall_lock
);
4944 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4945 spin_unlock(&recall_lock
);
4947 nfsd_print_count(clp
, count
, "delegations");
4951 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4953 struct nfs4_client
*clp
, *next
;
4955 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4957 if (!nfsd_netns_ready(nn
))
4960 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4961 count
+= func(clp
, max
- count
);
4962 if ((max
!= 0) && (count
>= max
))
4969 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4971 struct nfs4_client
*clp
;
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(clp
, &nn
->client_lru
, cl_lru
) {
4978 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4984 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4986 /* initialization to perform at module load time: */
4989 nfs4_state_init(void)
4994 * Since the lifetime of a delegation isn't limited to that of an open, a
4995 * client may quite reasonably hang on to a delegation as long as it has
4996 * the inode cached. This becomes an obvious problem the first time a
4997 * client's inode cache approaches the size of the server's total memory.
4999 * For now we avoid this problem by imposing a hard limit on the number
5000 * of delegations, which varies according to the server's memory size.
5003 set_max_delegations(void)
5006 * Allow at most 4 delegations per megabyte of RAM. Quick
5007 * estimates suggest that in the worst case (where every delegation
5008 * is for a different inode), a delegation could take about 1.5K,
5009 * giving a worst case usage of about 6% of memory.
5011 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
5014 static int nfs4_state_create_net(struct net
*net
)
5016 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5019 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5020 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5021 if (!nn
->conf_id_hashtbl
)
5023 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
5024 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5025 if (!nn
->unconf_id_hashtbl
)
5027 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
5028 OWNER_HASH_SIZE
, GFP_KERNEL
);
5029 if (!nn
->ownerstr_hashtbl
)
5031 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
5032 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
5033 if (!nn
->lockowner_ino_hashtbl
)
5034 goto err_lockowner_ino
;
5035 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
5036 SESSION_HASH_SIZE
, GFP_KERNEL
);
5037 if (!nn
->sessionid_hashtbl
)
5040 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5041 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5042 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5044 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5045 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5046 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5047 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5048 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5049 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5050 nn
->conf_name_tree
= RB_ROOT
;
5051 nn
->unconf_name_tree
= RB_ROOT
;
5052 INIT_LIST_HEAD(&nn
->client_lru
);
5053 INIT_LIST_HEAD(&nn
->close_lru
);
5054 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5055 spin_lock_init(&nn
->client_lock
);
5057 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5063 kfree(nn
->lockowner_ino_hashtbl
);
5065 kfree(nn
->ownerstr_hashtbl
);
5067 kfree(nn
->unconf_id_hashtbl
);
5069 kfree(nn
->conf_id_hashtbl
);
5075 nfs4_state_destroy_net(struct net
*net
)
5078 struct nfs4_client
*clp
= NULL
;
5079 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5081 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5082 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5083 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5084 destroy_client(clp
);
5088 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5089 while (!list_empty(&nn
->unconf_id_hashtbl
[i
])) {
5090 clp
= list_entry(nn
->unconf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5091 destroy_client(clp
);
5095 kfree(nn
->sessionid_hashtbl
);
5096 kfree(nn
->lockowner_ino_hashtbl
);
5097 kfree(nn
->ownerstr_hashtbl
);
5098 kfree(nn
->unconf_id_hashtbl
);
5099 kfree(nn
->conf_id_hashtbl
);
5104 nfs4_state_start_net(struct net
*net
)
5106 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5109 ret
= nfs4_state_create_net(net
);
5112 nfsd4_client_tracking_init(net
);
5113 nn
->boot_time
= get_seconds();
5114 locks_start_grace(net
, &nn
->nfsd4_manager
);
5115 nn
->grace_ended
= false;
5116 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5117 nn
->nfsd4_grace
, net
);
5118 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5122 /* initialization to perform when the nfsd service is started: */
5125 nfs4_state_start(void)
5129 ret
= set_callback_cred();
5132 laundry_wq
= create_singlethread_workqueue("nfsd4");
5133 if (laundry_wq
== NULL
) {
5137 ret
= nfsd4_create_callback_queue();
5139 goto out_free_laundry
;
5141 set_max_delegations();
5146 destroy_workqueue(laundry_wq
);
5152 nfs4_state_shutdown_net(struct net
*net
)
5154 struct nfs4_delegation
*dp
= NULL
;
5155 struct list_head
*pos
, *next
, reaplist
;
5156 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5158 cancel_delayed_work_sync(&nn
->laundromat_work
);
5159 locks_end_grace(&nn
->nfsd4_manager
);
5162 INIT_LIST_HEAD(&reaplist
);
5163 spin_lock(&recall_lock
);
5164 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5165 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5166 list_move(&dp
->dl_recall_lru
, &reaplist
);
5168 spin_unlock(&recall_lock
);
5169 list_for_each_safe(pos
, next
, &reaplist
) {
5170 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5171 destroy_delegation(dp
);
5174 nfsd4_client_tracking_exit(net
);
5175 nfs4_state_destroy_net(net
);
5176 nfs4_unlock_state();
5180 nfs4_state_shutdown(void)
5182 destroy_workqueue(laundry_wq
);
5183 nfsd4_destroy_callback_queue();
5187 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5189 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5190 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5194 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5196 if (cstate
->minorversion
) {
5197 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5198 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5203 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5205 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5209 * functions to set current state id
5212 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5214 put_stateid(cstate
, &odp
->od_stateid
);
5218 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5220 put_stateid(cstate
, &open
->op_stateid
);
5224 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5226 put_stateid(cstate
, &close
->cl_stateid
);
5230 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5232 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5236 * functions to consume current state id
5240 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5242 get_stateid(cstate
, &odp
->od_stateid
);
5246 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5248 get_stateid(cstate
, &drp
->dr_stateid
);
5252 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5254 get_stateid(cstate
, &fsp
->fr_stateid
);
5258 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5260 get_stateid(cstate
, &setattr
->sa_stateid
);
5264 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5266 get_stateid(cstate
, &close
->cl_stateid
);
5270 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5272 get_stateid(cstate
, &locku
->lu_stateid
);
5276 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5278 get_stateid(cstate
, &read
->rd_stateid
);
5282 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5284 get_stateid(cstate
, &write
->wr_stateid
);