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
*attrs
)
837 int numslots
= attrs
->maxreqs
;
838 int slotsize
= slot_bytes(attrs
);
839 struct nfsd4_session
*new;
842 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
843 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
844 mem
= numslots
* sizeof(struct nfsd4_slot
*);
846 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
849 /* allocate each struct nfsd4_slot and data cache in one piece */
850 for (i
= 0; i
< numslots
; i
++) {
851 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
852 if (!new->se_slots
[i
])
858 kfree(new->se_slots
[i
]);
863 static void free_conn(struct nfsd4_conn
*c
)
865 svc_xprt_put(c
->cn_xprt
);
869 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
871 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
872 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
874 spin_lock(&clp
->cl_lock
);
875 if (!list_empty(&c
->cn_persession
)) {
876 list_del(&c
->cn_persession
);
879 nfsd4_probe_callback(clp
);
880 spin_unlock(&clp
->cl_lock
);
883 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
885 struct nfsd4_conn
*conn
;
887 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
890 svc_xprt_get(rqstp
->rq_xprt
);
891 conn
->cn_xprt
= rqstp
->rq_xprt
;
892 conn
->cn_flags
= flags
;
893 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
897 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
899 conn
->cn_session
= ses
;
900 list_add(&conn
->cn_persession
, &ses
->se_conns
);
903 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
905 struct nfs4_client
*clp
= ses
->se_client
;
907 spin_lock(&clp
->cl_lock
);
908 __nfsd4_hash_conn(conn
, ses
);
909 spin_unlock(&clp
->cl_lock
);
912 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
914 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
915 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
918 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
922 nfsd4_hash_conn(conn
, ses
);
923 ret
= nfsd4_register_conn(conn
);
925 /* oops; xprt is already down: */
926 nfsd4_conn_lost(&conn
->cn_xpt_user
);
927 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
928 /* callback channel may be back up */
929 nfsd4_probe_callback(ses
->se_client
);
933 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
935 u32 dir
= NFS4_CDFC4_FORE
;
937 if (cses
->flags
& SESSION4_BACK_CHAN
)
938 dir
|= NFS4_CDFC4_BACK
;
939 return alloc_conn(rqstp
, dir
);
942 /* must be called under client_lock */
943 static void nfsd4_del_conns(struct nfsd4_session
*s
)
945 struct nfs4_client
*clp
= s
->se_client
;
946 struct nfsd4_conn
*c
;
948 spin_lock(&clp
->cl_lock
);
949 while (!list_empty(&s
->se_conns
)) {
950 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
951 list_del_init(&c
->cn_persession
);
952 spin_unlock(&clp
->cl_lock
);
954 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
957 spin_lock(&clp
->cl_lock
);
959 spin_unlock(&clp
->cl_lock
);
962 static void __free_session(struct nfsd4_session
*ses
)
964 free_session_slots(ses
);
968 static void free_session(struct nfsd4_session
*ses
)
970 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
972 lockdep_assert_held(&nn
->client_lock
);
973 nfsd4_del_conns(ses
);
974 nfsd4_put_drc_mem(&ses
->se_fchannel
);
978 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
981 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
983 new->se_client
= clp
;
986 INIT_LIST_HEAD(&new->se_conns
);
988 new->se_cb_seq_nr
= 1;
989 new->se_flags
= cses
->flags
;
990 new->se_cb_prog
= cses
->callback_prog
;
991 new->se_cb_sec
= cses
->cb_sec
;
992 atomic_set(&new->se_ref
, 0);
993 idx
= hash_sessionid(&new->se_sessionid
);
994 spin_lock(&nn
->client_lock
);
995 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
996 spin_lock(&clp
->cl_lock
);
997 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
998 spin_unlock(&clp
->cl_lock
);
999 spin_unlock(&nn
->client_lock
);
1000 memcpy(&new->se_fchannel
, &cses
->fore_channel
,
1001 sizeof(struct nfsd4_channel_attrs
));
1002 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1003 struct sockaddr
*sa
= svc_addr(rqstp
);
1005 * This is a little silly; with sessions there's no real
1006 * use for the callback address. Use the peer address
1007 * as a reasonable default for now, but consider fixing
1008 * the rpc client not to require an address in the
1011 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1012 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1016 /* caller must hold client_lock */
1017 static struct nfsd4_session
*
1018 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1020 struct nfsd4_session
*elem
;
1022 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1024 dump_sessionid(__func__
, sessionid
);
1025 idx
= hash_sessionid(sessionid
);
1026 /* Search in the appropriate list */
1027 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1028 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1029 NFS4_MAX_SESSIONID_LEN
)) {
1034 dprintk("%s: session not found\n", __func__
);
1038 /* caller must hold client_lock */
1040 unhash_session(struct nfsd4_session
*ses
)
1042 list_del(&ses
->se_hash
);
1043 spin_lock(&ses
->se_client
->cl_lock
);
1044 list_del(&ses
->se_perclnt
);
1045 spin_unlock(&ses
->se_client
->cl_lock
);
1048 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1050 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1052 if (clid
->cl_boot
== nn
->boot_time
)
1054 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1055 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1060 * XXX Should we use a slab cache ?
1061 * This type of memory management is somewhat inefficient, but we use it
1062 * anyway since SETCLIENTID is not a common operation.
1064 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1066 struct nfs4_client
*clp
;
1068 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1071 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1072 if (clp
->cl_name
.data
== NULL
) {
1076 clp
->cl_name
.len
= name
.len
;
1081 free_client(struct nfs4_client
*clp
)
1083 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1085 lockdep_assert_held(&nn
->client_lock
);
1086 while (!list_empty(&clp
->cl_sessions
)) {
1087 struct nfsd4_session
*ses
;
1088 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1090 list_del(&ses
->se_perclnt
);
1091 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1094 free_svc_cred(&clp
->cl_cred
);
1095 kfree(clp
->cl_name
.data
);
1096 idr_destroy(&clp
->cl_stateids
);
1100 /* must be called under the client_lock */
1102 unhash_client_locked(struct nfs4_client
*clp
)
1104 struct nfsd4_session
*ses
;
1106 list_del(&clp
->cl_lru
);
1107 spin_lock(&clp
->cl_lock
);
1108 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1109 list_del_init(&ses
->se_hash
);
1110 spin_unlock(&clp
->cl_lock
);
1114 destroy_client(struct nfs4_client
*clp
)
1116 struct nfs4_openowner
*oo
;
1117 struct nfs4_delegation
*dp
;
1118 struct list_head reaplist
;
1119 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1121 INIT_LIST_HEAD(&reaplist
);
1122 spin_lock(&recall_lock
);
1123 while (!list_empty(&clp
->cl_delegations
)) {
1124 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1125 list_del_init(&dp
->dl_perclnt
);
1126 list_move(&dp
->dl_recall_lru
, &reaplist
);
1128 spin_unlock(&recall_lock
);
1129 while (!list_empty(&reaplist
)) {
1130 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1131 destroy_delegation(dp
);
1133 list_splice_init(&clp
->cl_revoked
, &reaplist
);
1134 while (!list_empty(&reaplist
)) {
1135 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1136 destroy_revoked_delegation(dp
);
1138 while (!list_empty(&clp
->cl_openowners
)) {
1139 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1140 release_openowner(oo
);
1142 nfsd4_shutdown_callback(clp
);
1143 if (clp
->cl_cb_conn
.cb_xprt
)
1144 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1145 list_del(&clp
->cl_idhash
);
1146 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1147 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1149 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1150 spin_lock(&nn
->client_lock
);
1151 unhash_client_locked(clp
);
1152 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1154 spin_unlock(&nn
->client_lock
);
1157 static void expire_client(struct nfs4_client
*clp
)
1159 nfsd4_client_record_remove(clp
);
1160 destroy_client(clp
);
1163 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1165 memcpy(target
->cl_verifier
.data
, source
->data
,
1166 sizeof(target
->cl_verifier
.data
));
1169 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1171 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1172 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1175 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1177 if (source
->cr_principal
) {
1178 target
->cr_principal
=
1179 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1180 if (target
->cr_principal
== NULL
)
1183 target
->cr_principal
= NULL
;
1184 target
->cr_flavor
= source
->cr_flavor
;
1185 target
->cr_uid
= source
->cr_uid
;
1186 target
->cr_gid
= source
->cr_gid
;
1187 target
->cr_group_info
= source
->cr_group_info
;
1188 get_group_info(target
->cr_group_info
);
1189 target
->cr_gss_mech
= source
->cr_gss_mech
;
1190 if (source
->cr_gss_mech
)
1191 gss_mech_get(source
->cr_gss_mech
);
1196 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1200 res
= o1
->len
- o2
->len
;
1203 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1206 static int same_name(const char *n1
, const char *n2
)
1208 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1212 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1214 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1218 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1220 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1223 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1227 if (g1
->ngroups
!= g2
->ngroups
)
1229 for (i
=0; i
<g1
->ngroups
; i
++)
1230 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1236 * RFC 3530 language requires clid_inuse be returned when the
1237 * "principal" associated with a requests differs from that previously
1238 * used. We use uid, gid's, and gss principal string as our best
1239 * approximation. We also don't want to allow non-gss use of a client
1240 * established using gss: in theory cr_principal should catch that
1241 * change, but in practice cr_principal can be null even in the gss case
1242 * since gssd doesn't always pass down a principal string.
1244 static bool is_gss_cred(struct svc_cred
*cr
)
1246 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1247 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1252 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1254 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1255 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1256 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1257 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1259 if (cr1
->cr_principal
== cr2
->cr_principal
)
1261 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1263 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1266 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1268 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1271 if (!cr
->cr_gss_mech
)
1273 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1274 return service
== RPC_GSS_SVC_INTEGRITY
||
1275 service
== RPC_GSS_SVC_PRIVACY
;
1278 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1280 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1282 if (!cl
->cl_mach_cred
)
1284 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1286 if (!svc_rqst_integrity_protected(rqstp
))
1288 if (!cr
->cr_principal
)
1290 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1293 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1295 static u32 current_clientid
= 1;
1297 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1298 clp
->cl_clientid
.cl_id
= current_clientid
++;
1301 static void gen_confirm(struct nfs4_client
*clp
)
1306 verf
[0] = (__be32
)get_seconds();
1307 verf
[1] = (__be32
)i
++;
1308 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1311 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1313 struct nfs4_stid
*ret
;
1315 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1316 if (!ret
|| !ret
->sc_type
)
1321 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1323 struct nfs4_stid
*s
;
1325 s
= find_stateid(cl
, t
);
1328 if (typemask
& s
->sc_type
)
1333 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1334 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1336 struct nfs4_client
*clp
;
1337 struct sockaddr
*sa
= svc_addr(rqstp
);
1339 struct net
*net
= SVC_NET(rqstp
);
1340 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1342 clp
= alloc_client(name
);
1346 INIT_LIST_HEAD(&clp
->cl_sessions
);
1347 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1349 spin_lock(&nn
->client_lock
);
1351 spin_unlock(&nn
->client_lock
);
1354 idr_init(&clp
->cl_stateids
);
1355 atomic_set(&clp
->cl_refcount
, 0);
1356 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1357 INIT_LIST_HEAD(&clp
->cl_idhash
);
1358 INIT_LIST_HEAD(&clp
->cl_openowners
);
1359 INIT_LIST_HEAD(&clp
->cl_delegations
);
1360 INIT_LIST_HEAD(&clp
->cl_lru
);
1361 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1362 INIT_LIST_HEAD(&clp
->cl_revoked
);
1363 spin_lock_init(&clp
->cl_lock
);
1364 nfsd4_init_callback(&clp
->cl_cb_null
);
1365 clp
->cl_time
= get_seconds();
1366 clear_bit(0, &clp
->cl_cb_slot_busy
);
1367 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1368 copy_verf(clp
, verf
);
1369 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1371 clp
->cl_cb_session
= NULL
;
1377 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1379 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1380 struct nfs4_client
*clp
;
1383 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1386 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1387 new = &((*new)->rb_left
);
1389 new = &((*new)->rb_right
);
1392 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1393 rb_insert_color(&new_clp
->cl_namenode
, root
);
1396 static struct nfs4_client
*
1397 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1400 struct rb_node
*node
= root
->rb_node
;
1401 struct nfs4_client
*clp
;
1404 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1405 cmp
= compare_blob(&clp
->cl_name
, name
);
1407 node
= node
->rb_left
;
1409 node
= node
->rb_right
;
1417 add_to_unconfirmed(struct nfs4_client
*clp
)
1419 unsigned int idhashval
;
1420 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1422 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1423 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1424 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1425 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1430 move_to_confirmed(struct nfs4_client
*clp
)
1432 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1433 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1435 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1436 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1437 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1438 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1439 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1443 static struct nfs4_client
*
1444 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1446 struct nfs4_client
*clp
;
1447 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1449 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1450 if (same_clid(&clp
->cl_clientid
, clid
)) {
1451 if ((bool)clp
->cl_minorversion
!= sessions
)
1460 static struct nfs4_client
*
1461 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1463 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1465 return find_client_in_id_table(tbl
, clid
, sessions
);
1468 static struct nfs4_client
*
1469 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1471 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1473 return find_client_in_id_table(tbl
, clid
, sessions
);
1476 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1478 return clp
->cl_exchange_flags
!= 0;
1481 static struct nfs4_client
*
1482 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1484 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1487 static struct nfs4_client
*
1488 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1490 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1494 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1496 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1497 struct sockaddr
*sa
= svc_addr(rqstp
);
1498 u32 scopeid
= rpc_get_scope_id(sa
);
1499 unsigned short expected_family
;
1501 /* Currently, we only support tcp and tcp6 for the callback channel */
1502 if (se
->se_callback_netid_len
== 3 &&
1503 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1504 expected_family
= AF_INET
;
1505 else if (se
->se_callback_netid_len
== 4 &&
1506 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1507 expected_family
= AF_INET6
;
1511 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1512 se
->se_callback_addr_len
,
1513 (struct sockaddr
*)&conn
->cb_addr
,
1514 sizeof(conn
->cb_addr
));
1516 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1519 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1520 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1522 conn
->cb_prog
= se
->se_callback_prog
;
1523 conn
->cb_ident
= se
->se_callback_ident
;
1524 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1527 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1528 conn
->cb_addrlen
= 0;
1529 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1530 "will not receive delegations\n",
1531 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1537 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1540 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1542 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1545 dprintk("--> %s slot %p\n", __func__
, slot
);
1547 slot
->sl_opcnt
= resp
->opcnt
;
1548 slot
->sl_status
= resp
->cstate
.status
;
1550 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1551 if (nfsd4_not_cached(resp
)) {
1552 slot
->sl_datalen
= 0;
1555 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1556 base
= (char *)resp
->cstate
.datap
-
1557 (char *)resp
->xbuf
->head
[0].iov_base
;
1558 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1560 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1565 * Encode the replay sequence operation from the slot values.
1566 * If cachethis is FALSE encode the uncached rep error on the next
1567 * operation which sets resp->p and increments resp->opcnt for
1568 * nfs4svc_encode_compoundres.
1572 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1573 struct nfsd4_compoundres
*resp
)
1575 struct nfsd4_op
*op
;
1576 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1578 /* Encode the replayed sequence operation */
1579 op
= &args
->ops
[resp
->opcnt
- 1];
1580 nfsd4_encode_operation(resp
, op
);
1582 /* Return nfserr_retry_uncached_rep in next operation. */
1583 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1584 op
= &args
->ops
[resp
->opcnt
++];
1585 op
->status
= nfserr_retry_uncached_rep
;
1586 nfsd4_encode_operation(resp
, op
);
1592 * The sequence operation is not cached because we can use the slot and
1596 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1597 struct nfsd4_sequence
*seq
)
1599 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1602 dprintk("--> %s slot %p\n", __func__
, slot
);
1604 /* Either returns 0 or nfserr_retry_uncached */
1605 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1606 if (status
== nfserr_retry_uncached_rep
)
1609 /* The sequence operation has been encoded, cstate->datap set. */
1610 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1612 resp
->opcnt
= slot
->sl_opcnt
;
1613 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1614 status
= slot
->sl_status
;
1620 * Set the exchange_id flags returned by the server.
1623 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1625 /* pNFS is not supported */
1626 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1628 /* Referrals are supported, Migration is not. */
1629 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1631 /* set the wire flags to return to client. */
1632 clid
->flags
= new->cl_exchange_flags
;
1635 static bool client_has_state(struct nfs4_client
*clp
)
1638 * Note clp->cl_openowners check isn't quite right: there's no
1639 * need to count owners without stateid's.
1641 * Also note we should probably be using this in 4.0 case too.
1643 return !list_empty(&clp
->cl_openowners
)
1644 || !list_empty(&clp
->cl_delegations
)
1645 || !list_empty(&clp
->cl_sessions
);
1649 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1650 struct nfsd4_compound_state
*cstate
,
1651 struct nfsd4_exchange_id
*exid
)
1653 struct nfs4_client
*unconf
, *conf
, *new;
1655 char addr_str
[INET6_ADDRSTRLEN
];
1656 nfs4_verifier verf
= exid
->verifier
;
1657 struct sockaddr
*sa
= svc_addr(rqstp
);
1658 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1659 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1661 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1662 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1663 "ip_addr=%s flags %x, spa_how %d\n",
1664 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1665 addr_str
, exid
->flags
, exid
->spa_how
);
1667 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1668 return nfserr_inval
;
1670 switch (exid
->spa_how
) {
1672 if (!svc_rqst_integrity_protected(rqstp
))
1673 return nfserr_inval
;
1676 default: /* checked by xdr code */
1679 return nfserr_encr_alg_unsupp
;
1682 /* Cases below refer to rfc 5661 section 18.35.4: */
1684 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1686 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1687 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1690 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1691 status
= nfserr_inval
;
1694 if (!mach_creds_match(conf
, rqstp
)) {
1695 status
= nfserr_wrong_cred
;
1698 if (!creds_match
) { /* case 9 */
1699 status
= nfserr_perm
;
1702 if (!verfs_match
) { /* case 8 */
1703 status
= nfserr_not_same
;
1707 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1711 if (!creds_match
) { /* case 3 */
1712 if (client_has_state(conf
)) {
1713 status
= nfserr_clid_inuse
;
1716 expire_client(conf
);
1719 if (verfs_match
) { /* case 2 */
1720 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1724 /* case 5, client reboot */
1728 if (update
) { /* case 7 */
1729 status
= nfserr_noent
;
1733 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1734 if (unconf
) /* case 4, possible retry or client restart */
1735 expire_client(unconf
);
1737 /* case 1 (normal case) */
1739 new = create_client(exid
->clname
, rqstp
, &verf
);
1741 status
= nfserr_jukebox
;
1744 new->cl_minorversion
= cstate
->minorversion
;
1745 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1748 add_to_unconfirmed(new);
1750 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1751 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1753 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1754 nfsd4_set_ex_flags(new, exid
);
1756 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1757 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1761 nfs4_unlock_state();
1766 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1768 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1771 /* The slot is in use, and no response has been sent. */
1773 if (seqid
== slot_seqid
)
1774 return nfserr_jukebox
;
1776 return nfserr_seq_misordered
;
1778 /* Note unsigned 32-bit arithmetic handles wraparound: */
1779 if (likely(seqid
== slot_seqid
+ 1))
1781 if (seqid
== slot_seqid
)
1782 return nfserr_replay_cache
;
1783 return nfserr_seq_misordered
;
1787 * Cache the create session result into the create session single DRC
1788 * slot cache by saving the xdr structure. sl_seqid has been set.
1789 * Do this for solo or embedded create session operations.
1792 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1793 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1795 slot
->sl_status
= nfserr
;
1796 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1800 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1801 struct nfsd4_clid_slot
*slot
)
1803 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1804 return slot
->sl_status
;
1807 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1808 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1809 1 + /* MIN tag is length with zero, only length */ \
1810 3 + /* version, opcount, opcode */ \
1811 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1812 /* seqid, slotID, slotID, cache */ \
1813 4 ) * sizeof(__be32))
1815 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1816 2 + /* verifier: AUTH_NULL, length 0 */\
1818 1 + /* MIN tag is length with zero, only length */ \
1819 3 + /* opcount, opcode, opstatus*/ \
1820 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1821 /* seqid, slotID, slotID, slotID, status */ \
1822 5 ) * sizeof(__be32))
1824 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1826 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1828 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1829 return nfserr_toosmall
;
1830 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1831 return nfserr_toosmall
;
1832 ca
->headerpadsz
= 0;
1833 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1834 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1835 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1836 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1837 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1838 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1840 * Note decreasing slot size below client's request may make it
1841 * difficult for client to function correctly, whereas
1842 * decreasing the number of slots will (just?) affect
1843 * performance. When short on memory we therefore prefer to
1844 * decrease number of slots instead of their size. Clients that
1845 * request larger slots than they need will get poor results:
1847 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1849 return nfserr_jukebox
;
1854 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1856 ca
->headerpadsz
= 0;
1859 * These RPC_MAX_HEADER macros are overkill, especially since we
1860 * don't even do gss on the backchannel yet. But this is still
1861 * less than 1k. Tighten up this estimate in the unlikely event
1862 * it turns out to be a problem for some client:
1864 if (ca
->maxreq_sz
< NFS4_enc_cb_recall_sz
+ RPC_MAX_HEADER_WITH_AUTH
)
1865 return nfserr_toosmall
;
1866 if (ca
->maxresp_sz
< NFS4_dec_cb_recall_sz
+ RPC_MAX_REPHEADER_WITH_AUTH
)
1867 return nfserr_toosmall
;
1868 ca
->maxresp_cached
= 0;
1870 return nfserr_toosmall
;
1875 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1877 switch (cbs
->flavor
) {
1883 * GSS case: the spec doesn't allow us to return this
1884 * error. But it also doesn't allow us not to support
1886 * I'd rather this fail hard than return some error the
1887 * client might think it can already handle:
1889 return nfserr_encr_alg_unsupp
;
1894 nfsd4_create_session(struct svc_rqst
*rqstp
,
1895 struct nfsd4_compound_state
*cstate
,
1896 struct nfsd4_create_session
*cr_ses
)
1898 struct sockaddr
*sa
= svc_addr(rqstp
);
1899 struct nfs4_client
*conf
, *unconf
;
1900 struct nfsd4_session
*new;
1901 struct nfsd4_conn
*conn
;
1902 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1904 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1906 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1907 return nfserr_inval
;
1908 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
1911 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1914 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1917 status
= nfserr_jukebox
;
1918 new = alloc_session(&cr_ses
->fore_channel
);
1920 goto out_release_drc_mem
;
1921 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1923 goto out_free_session
;
1926 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1927 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1928 WARN_ON_ONCE(conf
&& unconf
);
1931 status
= nfserr_wrong_cred
;
1932 if (!mach_creds_match(conf
, rqstp
))
1934 cs_slot
= &conf
->cl_cs_slot
;
1935 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1936 if (status
== nfserr_replay_cache
) {
1937 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1939 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1940 status
= nfserr_seq_misordered
;
1943 } else if (unconf
) {
1944 struct nfs4_client
*old
;
1945 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1946 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1947 status
= nfserr_clid_inuse
;
1950 status
= nfserr_wrong_cred
;
1951 if (!mach_creds_match(unconf
, rqstp
))
1953 cs_slot
= &unconf
->cl_cs_slot
;
1954 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1956 /* an unconfirmed replay returns misordered */
1957 status
= nfserr_seq_misordered
;
1960 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1962 status
= mark_client_expired(old
);
1967 move_to_confirmed(unconf
);
1970 status
= nfserr_stale_clientid
;
1975 * We do not support RDMA or persistent sessions
1977 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1978 cr_ses
->flags
&= ~SESSION4_RDMA
;
1980 init_session(rqstp
, new, conf
, cr_ses
);
1981 nfsd4_init_conn(rqstp
, conn
, new);
1983 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1984 NFS4_MAX_SESSIONID_LEN
);
1985 cs_slot
->sl_seqid
++;
1986 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1988 /* cache solo and embedded create sessions under the state lock */
1989 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1990 nfs4_unlock_state();
1993 nfs4_unlock_state();
1996 __free_session(new);
1997 out_release_drc_mem
:
1998 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
2002 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
2005 case NFS4_CDFC4_FORE
:
2006 case NFS4_CDFC4_BACK
:
2008 case NFS4_CDFC4_FORE_OR_BOTH
:
2009 case NFS4_CDFC4_BACK_OR_BOTH
:
2010 *dir
= NFS4_CDFC4_BOTH
;
2013 return nfserr_inval
;
2016 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2018 struct nfsd4_session
*session
= cstate
->session
;
2019 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2022 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2025 spin_lock(&nn
->client_lock
);
2026 session
->se_cb_prog
= bc
->bc_cb_program
;
2027 session
->se_cb_sec
= bc
->bc_cb_sec
;
2028 spin_unlock(&nn
->client_lock
);
2030 nfsd4_probe_callback(session
->se_client
);
2035 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2036 struct nfsd4_compound_state
*cstate
,
2037 struct nfsd4_bind_conn_to_session
*bcts
)
2040 struct nfsd4_conn
*conn
;
2041 struct nfsd4_session
*session
;
2042 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2044 if (!nfsd4_last_compound_op(rqstp
))
2045 return nfserr_not_only_op
;
2047 spin_lock(&nn
->client_lock
);
2048 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2049 spin_unlock(&nn
->client_lock
);
2050 status
= nfserr_badsession
;
2053 status
= nfserr_wrong_cred
;
2054 if (!mach_creds_match(session
->se_client
, rqstp
))
2056 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2059 conn
= alloc_conn(rqstp
, bcts
->dir
);
2060 status
= nfserr_jukebox
;
2063 nfsd4_init_conn(rqstp
, conn
, session
);
2066 nfs4_unlock_state();
2070 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2074 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2078 nfsd4_destroy_session(struct svc_rqst
*r
,
2079 struct nfsd4_compound_state
*cstate
,
2080 struct nfsd4_destroy_session
*sessionid
)
2082 struct nfsd4_session
*ses
;
2084 int ref_held_by_me
= 0;
2085 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2088 status
= nfserr_not_only_op
;
2089 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2090 if (!nfsd4_last_compound_op(r
))
2094 dump_sessionid(__func__
, &sessionid
->sessionid
);
2095 spin_lock(&nn
->client_lock
);
2096 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2097 status
= nfserr_badsession
;
2099 goto out_client_lock
;
2100 status
= nfserr_wrong_cred
;
2101 if (!mach_creds_match(ses
->se_client
, r
))
2102 goto out_client_lock
;
2103 nfsd4_get_session_locked(ses
);
2104 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2106 goto out_put_session
;
2107 unhash_session(ses
);
2108 spin_unlock(&nn
->client_lock
);
2110 nfsd4_probe_callback_sync(ses
->se_client
);
2112 spin_lock(&nn
->client_lock
);
2115 nfsd4_put_session(ses
);
2117 spin_unlock(&nn
->client_lock
);
2119 nfs4_unlock_state();
2123 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2125 struct nfsd4_conn
*c
;
2127 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2128 if (c
->cn_xprt
== xpt
) {
2135 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2137 struct nfs4_client
*clp
= ses
->se_client
;
2138 struct nfsd4_conn
*c
;
2139 __be32 status
= nfs_ok
;
2142 spin_lock(&clp
->cl_lock
);
2143 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2146 status
= nfserr_conn_not_bound_to_session
;
2147 if (clp
->cl_mach_cred
)
2149 __nfsd4_hash_conn(new, ses
);
2150 spin_unlock(&clp
->cl_lock
);
2151 ret
= nfsd4_register_conn(new);
2153 /* oops; xprt is already down: */
2154 nfsd4_conn_lost(&new->cn_xpt_user
);
2157 spin_unlock(&clp
->cl_lock
);
2162 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2164 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2166 return args
->opcnt
> session
->se_fchannel
.maxops
;
2169 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2170 struct nfsd4_session
*session
)
2172 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2174 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2178 nfsd4_sequence(struct svc_rqst
*rqstp
,
2179 struct nfsd4_compound_state
*cstate
,
2180 struct nfsd4_sequence
*seq
)
2182 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2183 struct nfsd4_session
*session
;
2184 struct nfs4_client
*clp
;
2185 struct nfsd4_slot
*slot
;
2186 struct nfsd4_conn
*conn
;
2188 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2190 if (resp
->opcnt
!= 1)
2191 return nfserr_sequence_pos
;
2194 * Will be either used or freed by nfsd4_sequence_check_conn
2197 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2199 return nfserr_jukebox
;
2201 spin_lock(&nn
->client_lock
);
2202 status
= nfserr_badsession
;
2203 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2205 goto out_no_session
;
2206 clp
= session
->se_client
;
2207 status
= get_client_locked(clp
);
2209 goto out_no_session
;
2210 status
= nfsd4_get_session_locked(session
);
2212 goto out_put_client
;
2214 status
= nfserr_too_many_ops
;
2215 if (nfsd4_session_too_many_ops(rqstp
, session
))
2216 goto out_put_session
;
2218 status
= nfserr_req_too_big
;
2219 if (nfsd4_request_too_big(rqstp
, session
))
2220 goto out_put_session
;
2222 status
= nfserr_badslot
;
2223 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2224 goto out_put_session
;
2226 slot
= session
->se_slots
[seq
->slotid
];
2227 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2229 /* We do not negotiate the number of slots yet, so set the
2230 * maxslots to the session maxreqs which is used to encode
2231 * sr_highest_slotid and the sr_target_slot id to maxslots */
2232 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2234 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2235 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2236 if (status
== nfserr_replay_cache
) {
2237 status
= nfserr_seq_misordered
;
2238 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2239 goto out_put_session
;
2240 cstate
->slot
= slot
;
2241 cstate
->session
= session
;
2242 /* Return the cached reply status and set cstate->status
2243 * for nfsd4_proc_compound processing */
2244 status
= nfsd4_replay_cache_entry(resp
, seq
);
2245 cstate
->status
= nfserr_replay_cache
;
2249 goto out_put_session
;
2251 status
= nfsd4_sequence_check_conn(conn
, session
);
2254 goto out_put_session
;
2256 /* Success! bump slot seqid */
2257 slot
->sl_seqid
= seq
->seqid
;
2258 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2260 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2262 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2264 cstate
->slot
= slot
;
2265 cstate
->session
= session
;
2268 switch (clp
->cl_cb_state
) {
2270 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2272 case NFSD4_CB_FAULT
:
2273 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2276 seq
->status_flags
= 0;
2278 if (!list_empty(&clp
->cl_revoked
))
2279 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2282 spin_unlock(&nn
->client_lock
);
2285 nfsd4_put_session(session
);
2287 put_client_renew_locked(clp
);
2288 goto out_no_session
;
2292 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2294 struct nfs4_client
*conf
, *unconf
, *clp
;
2296 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2299 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2300 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2301 WARN_ON_ONCE(conf
&& unconf
);
2306 if (client_has_state(conf
)) {
2307 status
= nfserr_clientid_busy
;
2313 status
= nfserr_stale_clientid
;
2316 if (!mach_creds_match(clp
, rqstp
)) {
2317 status
= nfserr_wrong_cred
;
2322 nfs4_unlock_state();
2327 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2331 if (rc
->rca_one_fs
) {
2332 if (!cstate
->current_fh
.fh_dentry
)
2333 return nfserr_nofilehandle
;
2335 * We don't take advantage of the rca_one_fs case.
2336 * That's OK, it's optional, we can safely ignore it.
2342 status
= nfserr_complete_already
;
2343 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2344 &cstate
->session
->se_client
->cl_flags
))
2347 status
= nfserr_stale_clientid
;
2348 if (is_client_expired(cstate
->session
->se_client
))
2350 * The following error isn't really legal.
2351 * But we only get here if the client just explicitly
2352 * destroyed the client. Surely it no longer cares what
2353 * error it gets back on an operation for the dead
2359 nfsd4_client_record_create(cstate
->session
->se_client
);
2361 nfs4_unlock_state();
2366 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2367 struct nfsd4_setclientid
*setclid
)
2369 struct xdr_netobj clname
= setclid
->se_name
;
2370 nfs4_verifier clverifier
= setclid
->se_verf
;
2371 struct nfs4_client
*conf
, *unconf
, *new;
2373 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2375 /* Cases below refer to rfc 3530 section 14.2.33: */
2377 conf
= find_confirmed_client_by_name(&clname
, nn
);
2380 status
= nfserr_clid_inuse
;
2381 if (clp_used_exchangeid(conf
))
2383 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2384 char addr_str
[INET6_ADDRSTRLEN
];
2385 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2387 dprintk("NFSD: setclientid: string in use by client "
2388 "at %s\n", addr_str
);
2392 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2394 expire_client(unconf
);
2395 status
= nfserr_jukebox
;
2396 new = create_client(clname
, rqstp
, &clverifier
);
2399 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2400 /* case 1: probable callback update */
2401 copy_clid(new, conf
);
2402 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2404 new->cl_minorversion
= 0;
2405 gen_callback(new, setclid
, rqstp
);
2406 add_to_unconfirmed(new);
2407 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2408 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2409 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2412 nfs4_unlock_state();
2418 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2419 struct nfsd4_compound_state
*cstate
,
2420 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2422 struct nfs4_client
*conf
, *unconf
;
2423 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2424 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2426 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2428 if (STALE_CLIENTID(clid
, nn
))
2429 return nfserr_stale_clientid
;
2432 conf
= find_confirmed_client(clid
, false, nn
);
2433 unconf
= find_unconfirmed_client(clid
, false, nn
);
2435 * We try hard to give out unique clientid's, so if we get an
2436 * attempt to confirm the same clientid with a different cred,
2437 * there's a bug somewhere. Let's charitably assume it's our
2440 status
= nfserr_serverfault
;
2441 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2443 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2445 /* cases below refer to rfc 3530 section 14.2.34: */
2446 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2447 if (conf
&& !unconf
) /* case 2: probable retransmit */
2449 else /* case 4: client hasn't noticed we rebooted yet? */
2450 status
= nfserr_stale_clientid
;
2454 if (conf
) { /* case 1: callback update */
2455 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2456 nfsd4_probe_callback(conf
);
2457 expire_client(unconf
);
2458 } else { /* case 3: normal case; new or rebooted client */
2459 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2461 status
= mark_client_expired(conf
);
2464 expire_client(conf
);
2466 move_to_confirmed(unconf
);
2467 nfsd4_probe_callback(unconf
);
2470 nfs4_unlock_state();
2474 static struct nfs4_file
*nfsd4_alloc_file(void)
2476 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2479 /* OPEN Share state helper functions */
2480 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2482 unsigned int hashval
= file_hashval(ino
);
2484 atomic_set(&fp
->fi_ref
, 1);
2485 INIT_LIST_HEAD(&fp
->fi_stateids
);
2486 INIT_LIST_HEAD(&fp
->fi_delegations
);
2487 fp
->fi_inode
= igrab(ino
);
2488 fp
->fi_had_conflict
= false;
2489 fp
->fi_lease
= NULL
;
2490 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2491 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2492 spin_lock(&recall_lock
);
2493 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2494 spin_unlock(&recall_lock
);
2498 nfsd4_free_slab(struct kmem_cache
**slab
)
2502 kmem_cache_destroy(*slab
);
2507 nfsd4_free_slabs(void)
2509 nfsd4_free_slab(&openowner_slab
);
2510 nfsd4_free_slab(&lockowner_slab
);
2511 nfsd4_free_slab(&file_slab
);
2512 nfsd4_free_slab(&stateid_slab
);
2513 nfsd4_free_slab(&deleg_slab
);
2517 nfsd4_init_slabs(void)
2519 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2520 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2521 if (openowner_slab
== NULL
)
2523 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2524 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2525 if (lockowner_slab
== NULL
)
2527 file_slab
= kmem_cache_create("nfsd4_files",
2528 sizeof(struct nfs4_file
), 0, 0, NULL
);
2529 if (file_slab
== NULL
)
2531 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2532 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2533 if (stateid_slab
== NULL
)
2535 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2536 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2537 if (deleg_slab
== NULL
)
2542 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2546 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2548 kfree(oo
->oo_owner
.so_owner
.data
);
2549 kmem_cache_free(openowner_slab
, oo
);
2552 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2554 kfree(lo
->lo_owner
.so_owner
.data
);
2555 kmem_cache_free(lockowner_slab
, lo
);
2558 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2560 rp
->rp_status
= nfserr_serverfault
;
2562 rp
->rp_buf
= rp
->rp_ibuf
;
2565 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2567 struct nfs4_stateowner
*sop
;
2569 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2573 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2574 if (!sop
->so_owner
.data
) {
2575 kmem_cache_free(slab
, sop
);
2578 sop
->so_owner
.len
= owner
->len
;
2580 INIT_LIST_HEAD(&sop
->so_stateids
);
2581 sop
->so_client
= clp
;
2582 init_nfs4_replay(&sop
->so_replay
);
2586 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2588 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2590 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2591 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2594 static struct nfs4_openowner
*
2595 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2596 struct nfs4_openowner
*oo
;
2598 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2601 oo
->oo_owner
.so_is_open_owner
= 1;
2602 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2603 oo
->oo_flags
= NFS4_OO_NEW
;
2605 oo
->oo_last_closed_stid
= NULL
;
2606 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2607 hash_openowner(oo
, clp
, strhashval
);
2611 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2612 struct nfs4_openowner
*oo
= open
->op_openowner
;
2614 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2615 INIT_LIST_HEAD(&stp
->st_lockowners
);
2616 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2617 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2618 stp
->st_stateowner
= &oo
->oo_owner
;
2621 stp
->st_access_bmap
= 0;
2622 stp
->st_deny_bmap
= 0;
2623 set_access(open
->op_share_access
, stp
);
2624 set_deny(open
->op_share_deny
, stp
);
2625 stp
->st_openstp
= NULL
;
2629 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2631 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2633 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2635 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2636 oo
->oo_time
= get_seconds();
2640 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2643 return (sop
->so_owner
.len
== owner
->len
) &&
2644 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2645 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2648 static struct nfs4_openowner
*
2649 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2650 bool sessions
, struct nfsd_net
*nn
)
2652 struct nfs4_stateowner
*so
;
2653 struct nfs4_openowner
*oo
;
2654 struct nfs4_client
*clp
;
2656 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2657 if (!so
->so_is_open_owner
)
2659 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2661 clp
= oo
->oo_owner
.so_client
;
2662 if ((bool)clp
->cl_minorversion
!= sessions
)
2664 renew_client(oo
->oo_owner
.so_client
);
2671 /* search file_hashtbl[] for file */
2672 static struct nfs4_file
*
2673 find_file(struct inode
*ino
)
2675 unsigned int hashval
= file_hashval(ino
);
2676 struct nfs4_file
*fp
;
2678 spin_lock(&recall_lock
);
2679 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2680 if (fp
->fi_inode
== ino
) {
2682 spin_unlock(&recall_lock
);
2686 spin_unlock(&recall_lock
);
2691 * Called to check deny when READ with all zero stateid or
2692 * WRITE with all zero or all one stateid
2695 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2697 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2698 struct nfs4_file
*fp
;
2699 struct nfs4_ol_stateid
*stp
;
2702 fp
= find_file(ino
);
2705 ret
= nfserr_locked
;
2706 /* Search for conflicting share reservations */
2707 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2708 if (test_deny(deny_type
, stp
) ||
2709 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2718 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2720 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2721 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2723 /* We're assuming the state code never drops its reference
2724 * without first removing the lease. Since we're in this lease
2725 * callback (and since the lease code is serialized by the kernel
2726 * lock) we know the server hasn't removed the lease yet, we know
2727 * it's safe to take a reference: */
2728 atomic_inc(&dp
->dl_count
);
2730 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2732 /* Only place dl_time is set; protected by i_lock: */
2733 dp
->dl_time
= get_seconds();
2735 nfsd4_cb_recall(dp
);
2738 /* Called from break_lease() with i_lock held. */
2739 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2741 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2742 struct nfs4_delegation
*dp
;
2745 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2748 if (fp
->fi_had_conflict
) {
2749 WARN(1, "duplicate break on %p\n", fp
);
2753 * We don't want the locks code to timeout the lease for us;
2754 * we'll remove it ourself if a delegation isn't returned
2757 fl
->fl_break_time
= 0;
2759 spin_lock(&recall_lock
);
2760 fp
->fi_had_conflict
= true;
2761 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2762 nfsd_break_one_deleg(dp
);
2763 spin_unlock(&recall_lock
);
2767 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2770 return lease_modify(onlist
, arg
);
2775 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2776 .lm_break
= nfsd_break_deleg_cb
,
2777 .lm_change
= nfsd_change_deleg_cb
,
2780 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2782 if (nfsd4_has_session(cstate
))
2784 if (seqid
== so
->so_seqid
- 1)
2785 return nfserr_replay_me
;
2786 if (seqid
== so
->so_seqid
)
2788 return nfserr_bad_seqid
;
2792 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2793 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2795 clientid_t
*clientid
= &open
->op_clientid
;
2796 struct nfs4_client
*clp
= NULL
;
2797 unsigned int strhashval
;
2798 struct nfs4_openowner
*oo
= NULL
;
2801 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2802 return nfserr_stale_clientid
;
2804 * In case we need it later, after we've already created the
2805 * file and don't want to risk a further failure:
2807 open
->op_file
= nfsd4_alloc_file();
2808 if (open
->op_file
== NULL
)
2809 return nfserr_jukebox
;
2811 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2812 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2813 open
->op_openowner
= oo
;
2815 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2818 return nfserr_expired
;
2821 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2822 /* Replace unconfirmed owners without checking for replay. */
2823 clp
= oo
->oo_owner
.so_client
;
2824 release_openowner(oo
);
2825 open
->op_openowner
= NULL
;
2828 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2831 clp
= oo
->oo_owner
.so_client
;
2834 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2836 return nfserr_jukebox
;
2837 open
->op_openowner
= oo
;
2839 open
->op_stp
= nfs4_alloc_stateid(clp
);
2841 return nfserr_jukebox
;
2845 static inline __be32
2846 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2848 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2849 return nfserr_openmode
;
2854 static int share_access_to_flags(u32 share_access
)
2856 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2859 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2861 struct nfs4_stid
*ret
;
2863 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2866 return delegstateid(ret
);
2869 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2871 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2872 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2876 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2877 struct nfs4_delegation
**dp
)
2880 __be32 status
= nfserr_bad_stateid
;
2882 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2885 flags
= share_access_to_flags(open
->op_share_access
);
2886 status
= nfs4_check_delegmode(*dp
, flags
);
2890 if (!nfsd4_is_deleg_cur(open
))
2894 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2899 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2901 struct nfs4_ol_stateid
*local
;
2902 struct nfs4_openowner
*oo
= open
->op_openowner
;
2904 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2905 /* ignore lock owners */
2906 if (local
->st_stateowner
->so_is_open_owner
== 0)
2908 /* remember if we have seen this open owner */
2909 if (local
->st_stateowner
== &oo
->oo_owner
)
2911 /* check for conflicting share reservations */
2912 if (!test_share(local
, open
))
2913 return nfserr_share_denied
;
2918 static inline int nfs4_access_to_access(u32 nfs4_access
)
2922 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2923 flags
|= NFSD_MAY_READ
;
2924 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2925 flags
|= NFSD_MAY_WRITE
;
2929 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2930 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2933 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2934 int access
= nfs4_access_to_access(open
->op_share_access
);
2936 if (!fp
->fi_fds
[oflag
]) {
2937 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2938 &fp
->fi_fds
[oflag
]);
2942 nfs4_file_get_access(fp
, oflag
);
2947 static inline __be32
2948 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2949 struct nfsd4_open
*open
)
2951 struct iattr iattr
= {
2952 .ia_valid
= ATTR_SIZE
,
2955 if (!open
->op_truncate
)
2957 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2958 return nfserr_inval
;
2959 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2963 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
)
2965 u32 op_share_access
= open
->op_share_access
;
2969 new_access
= !test_access(op_share_access
, stp
);
2971 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2975 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2978 int oflag
= nfs4_access_to_omode(op_share_access
);
2979 nfs4_file_put_access(fp
, oflag
);
2983 /* remember the open */
2984 set_access(op_share_access
, stp
);
2985 set_deny(open
->op_share_deny
, stp
);
2992 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2994 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2997 /* Should we give out recallable state?: */
2998 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
3000 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
3003 * In the sessions case, since we don't have to establish a
3004 * separate connection for callbacks, we assume it's OK
3005 * until we hear otherwise:
3007 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3010 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3012 struct file_lock
*fl
;
3014 fl
= locks_alloc_lock();
3017 locks_init_lock(fl
);
3018 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3019 fl
->fl_flags
= FL_DELEG
;
3020 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3021 fl
->fl_end
= OFFSET_MAX
;
3022 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3023 fl
->fl_pid
= current
->tgid
;
3027 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3029 struct nfs4_file
*fp
= dp
->dl_file
;
3030 struct file_lock
*fl
;
3033 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3036 fl
->fl_file
= find_readable_file(fp
);
3037 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3038 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3040 list_del_init(&dp
->dl_perclnt
);
3041 locks_free_lock(fl
);
3045 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3046 atomic_set(&fp
->fi_delegees
, 1);
3047 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3051 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, struct nfs4_file
*fp
)
3055 if (fp
->fi_had_conflict
)
3059 if (!fp
->fi_lease
) {
3060 status
= nfs4_setlease(dp
);
3065 spin_lock(&recall_lock
);
3066 if (fp
->fi_had_conflict
) {
3067 spin_unlock(&recall_lock
);
3071 atomic_inc(&fp
->fi_delegees
);
3072 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3073 spin_unlock(&recall_lock
);
3074 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3082 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3084 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3085 if (status
== -EAGAIN
)
3086 open
->op_why_no_deleg
= WND4_CONTENTION
;
3088 open
->op_why_no_deleg
= WND4_RESOURCE
;
3089 switch (open
->op_deleg_want
) {
3090 case NFS4_SHARE_WANT_READ_DELEG
:
3091 case NFS4_SHARE_WANT_WRITE_DELEG
:
3092 case NFS4_SHARE_WANT_ANY_DELEG
:
3094 case NFS4_SHARE_WANT_CANCEL
:
3095 open
->op_why_no_deleg
= WND4_CANCELLED
;
3097 case NFS4_SHARE_WANT_NO_DELEG
:
3104 * Attempt to hand out a delegation.
3106 * Note we don't support write delegations, and won't until the vfs has
3107 * proper support for them.
3110 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3111 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3113 struct nfs4_delegation
*dp
;
3114 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3118 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3119 open
->op_recall
= 0;
3120 switch (open
->op_claim_type
) {
3121 case NFS4_OPEN_CLAIM_PREVIOUS
:
3123 open
->op_recall
= 1;
3124 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3127 case NFS4_OPEN_CLAIM_NULL
:
3129 * Let's not give out any delegations till everyone's
3130 * had the chance to reclaim theirs....
3132 if (locks_in_grace(net
))
3134 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3137 * Also, if the file was opened for write or
3138 * create, there's a good chance the client's
3139 * about to write to it, resulting in an
3140 * immediate recall (since we don't support
3141 * write delegations):
3143 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3145 if (open
->op_create
== NFS4_OPEN_CREATE
)
3151 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3154 status
= nfs4_set_delegation(dp
, stp
->st_file
);
3158 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3160 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3161 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3162 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3165 remove_stid(&dp
->dl_stid
);
3166 nfs4_put_delegation(dp
);
3168 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3169 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3170 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3171 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3172 open
->op_recall
= 1;
3175 /* 4.1 client asking for a delegation? */
3176 if (open
->op_deleg_want
)
3177 nfsd4_open_deleg_none_ext(open
, status
);
3181 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3182 struct nfs4_delegation
*dp
)
3184 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3185 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3186 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3187 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3188 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3189 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3190 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3191 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3193 /* Otherwise the client must be confused wanting a delegation
3194 * it already has, therefore we don't return
3195 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3200 * called with nfs4_lock_state() held.
3203 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3205 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3206 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3207 struct nfs4_file
*fp
= NULL
;
3208 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3209 struct nfs4_ol_stateid
*stp
= NULL
;
3210 struct nfs4_delegation
*dp
= NULL
;
3214 * Lookup file; if found, lookup stateid and check open request,
3215 * and check for delegations in the process of being recalled.
3216 * If not found, create the nfs4_file struct
3218 fp
= find_file(ino
);
3220 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3222 status
= nfs4_check_deleg(cl
, open
, &dp
);
3226 status
= nfserr_bad_stateid
;
3227 if (nfsd4_is_deleg_cur(open
))
3229 status
= nfserr_jukebox
;
3231 open
->op_file
= NULL
;
3232 nfsd4_init_file(fp
, ino
);
3236 * OPEN the file, or upgrade an existing OPEN.
3237 * If truncate fails, the OPEN fails.
3240 /* Stateid was found, this is an OPEN upgrade */
3241 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3245 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3248 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3252 open
->op_stp
= NULL
;
3253 init_open_stateid(stp
, fp
, open
);
3255 update_stateid(&stp
->st_stid
.sc_stateid
);
3256 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3258 if (nfsd4_has_session(&resp
->cstate
)) {
3259 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3261 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3262 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3263 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3269 * Attempt to hand out a delegation. No error return, because the
3270 * OPEN succeeds even if we fail.
3272 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3276 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3277 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3279 /* 4.1 client trying to upgrade/downgrade delegation? */
3280 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3281 open
->op_deleg_want
)
3282 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3286 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3287 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3289 * To finish the open response, we just need to set the rflags.
3291 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3292 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3293 !nfsd4_has_session(&resp
->cstate
))
3294 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3299 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3301 if (open
->op_openowner
) {
3302 struct nfs4_openowner
*oo
= open
->op_openowner
;
3304 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3305 list_del_init(&oo
->oo_close_lru
);
3306 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3308 release_openowner(oo
);
3309 open
->op_openowner
= NULL
;
3311 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3315 nfsd4_free_file(open
->op_file
);
3317 free_generic_stateid(open
->op_stp
);
3320 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3322 struct nfs4_client
*found
;
3324 if (STALE_CLIENTID(clid
, nn
))
3325 return nfserr_stale_clientid
;
3326 found
= find_confirmed_client(clid
, session
, nn
);
3329 return found
? nfs_ok
: nfserr_expired
;
3333 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3336 struct nfs4_client
*clp
;
3338 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3341 dprintk("process_renew(%08x/%08x): starting\n",
3342 clid
->cl_boot
, clid
->cl_id
);
3343 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3346 status
= nfserr_cb_path_down
;
3347 if (!list_empty(&clp
->cl_delegations
)
3348 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3352 nfs4_unlock_state();
3357 nfsd4_end_grace(struct nfsd_net
*nn
)
3359 /* do nothing if grace period already ended */
3360 if (nn
->grace_ended
)
3363 dprintk("NFSD: end of grace period\n");
3364 nn
->grace_ended
= true;
3365 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3366 locks_end_grace(&nn
->nfsd4_manager
);
3368 * Now that every NFSv4 client has had the chance to recover and
3369 * to see the (possibly new, possibly shorter) lease time, we
3370 * can safely set the next grace time to the current lease time:
3372 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3376 nfs4_laundromat(struct nfsd_net
*nn
)
3378 struct nfs4_client
*clp
;
3379 struct nfs4_openowner
*oo
;
3380 struct nfs4_delegation
*dp
;
3381 struct list_head
*pos
, *next
, reaplist
;
3382 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3383 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3384 time_t u
, test_val
= nn
->nfsd4_lease
;
3388 dprintk("NFSD: laundromat service - starting\n");
3389 nfsd4_end_grace(nn
);
3390 INIT_LIST_HEAD(&reaplist
);
3391 spin_lock(&nn
->client_lock
);
3392 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3393 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3394 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3395 t
= clp
->cl_time
- cutoff
;
3396 if (clientid_val
> t
)
3400 if (mark_client_expired_locked(clp
)) {
3401 dprintk("NFSD: client in use (clientid %08x)\n",
3402 clp
->cl_clientid
.cl_id
);
3405 list_move(&clp
->cl_lru
, &reaplist
);
3407 spin_unlock(&nn
->client_lock
);
3408 list_for_each_safe(pos
, next
, &reaplist
) {
3409 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3410 dprintk("NFSD: purging unused client (clientid %08x)\n",
3411 clp
->cl_clientid
.cl_id
);
3414 spin_lock(&recall_lock
);
3415 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3416 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3417 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3419 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3420 u
= dp
->dl_time
- cutoff
;
3425 list_move(&dp
->dl_recall_lru
, &reaplist
);
3427 spin_unlock(&recall_lock
);
3428 list_for_each_safe(pos
, next
, &reaplist
) {
3429 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3430 revoke_delegation(dp
);
3432 test_val
= nn
->nfsd4_lease
;
3433 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3434 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3435 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3436 u
= oo
->oo_time
- cutoff
;
3441 release_openowner(oo
);
3443 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3444 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3445 nfs4_unlock_state();
3446 return clientid_val
;
3449 static struct workqueue_struct
*laundry_wq
;
3450 static void laundromat_main(struct work_struct
*);
3453 laundromat_main(struct work_struct
*laundry
)
3456 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3458 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3461 t
= nfs4_laundromat(nn
);
3462 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3463 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3466 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3468 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3469 return nfserr_bad_stateid
;
3474 access_permit_read(struct nfs4_ol_stateid
*stp
)
3476 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3477 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3478 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3482 access_permit_write(struct nfs4_ol_stateid
*stp
)
3484 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3485 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3489 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3491 __be32 status
= nfserr_openmode
;
3493 /* For lock stateid's, we test the parent open, not the lock: */
3494 if (stp
->st_openstp
)
3495 stp
= stp
->st_openstp
;
3496 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3498 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3505 static inline __be32
3506 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3508 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3510 else if (locks_in_grace(net
)) {
3511 /* Answer in remaining cases depends on existence of
3512 * conflicting state; so we must wait out the grace period. */
3513 return nfserr_grace
;
3514 } else if (flags
& WR_STATE
)
3515 return nfs4_share_conflict(current_fh
,
3516 NFS4_SHARE_DENY_WRITE
);
3517 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3518 return nfs4_share_conflict(current_fh
,
3519 NFS4_SHARE_DENY_READ
);
3523 * Allow READ/WRITE during grace period on recovered state only for files
3524 * that are not able to provide mandatory locking.
3527 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3529 return locks_in_grace(net
) && mandatory_lock(inode
);
3532 /* Returns true iff a is later than b: */
3533 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3535 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3538 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3541 * When sessions are used the stateid generation number is ignored
3544 if (has_session
&& in
->si_generation
== 0)
3547 if (in
->si_generation
== ref
->si_generation
)
3550 /* If the client sends us a stateid from the future, it's buggy: */
3551 if (stateid_generation_after(in
, ref
))
3552 return nfserr_bad_stateid
;
3554 * However, we could see a stateid from the past, even from a
3555 * non-buggy client. For example, if the client sends a lock
3556 * while some IO is outstanding, the lock may bump si_generation
3557 * while the IO is still in flight. The client could avoid that
3558 * situation by waiting for responses on all the IO requests,
3559 * but better performance may result in retrying IO that
3560 * receives an old_stateid error if requests are rarely
3561 * reordered in flight:
3563 return nfserr_old_stateid
;
3566 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3568 struct nfs4_stid
*s
;
3569 struct nfs4_ol_stateid
*ols
;
3572 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3573 return nfserr_bad_stateid
;
3574 /* Client debugging aid. */
3575 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3576 char addr_str
[INET6_ADDRSTRLEN
];
3577 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3579 pr_warn_ratelimited("NFSD: client %s testing state ID "
3580 "with incorrect client ID\n", addr_str
);
3581 return nfserr_bad_stateid
;
3583 s
= find_stateid(cl
, stateid
);
3585 return nfserr_bad_stateid
;
3586 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3589 switch (s
->sc_type
) {
3590 case NFS4_DELEG_STID
:
3592 case NFS4_REVOKED_DELEG_STID
:
3593 return nfserr_deleg_revoked
;
3594 case NFS4_OPEN_STID
:
3595 case NFS4_LOCK_STID
:
3596 ols
= openlockstateid(s
);
3597 if (ols
->st_stateowner
->so_is_open_owner
3598 && !(openowner(ols
->st_stateowner
)->oo_flags
3599 & NFS4_OO_CONFIRMED
))
3600 return nfserr_bad_stateid
;
3603 printk("unknown stateid type %x\n", s
->sc_type
);
3604 case NFS4_CLOSED_STID
:
3605 return nfserr_bad_stateid
;
3609 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3610 struct nfs4_stid
**s
, bool sessions
,
3611 struct nfsd_net
*nn
)
3613 struct nfs4_client
*cl
;
3616 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3617 return nfserr_bad_stateid
;
3618 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3620 if (status
== nfserr_stale_clientid
)
3621 return nfserr_stale_stateid
;
3624 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3626 return nfserr_bad_stateid
;
3631 * Checks for stateid operations
3634 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3635 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3637 struct nfs4_stid
*s
;
3638 struct nfs4_ol_stateid
*stp
= NULL
;
3639 struct nfs4_delegation
*dp
= NULL
;
3640 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3641 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3642 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3648 if (grace_disallows_io(net
, ino
))
3649 return nfserr_grace
;
3651 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3652 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3654 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3655 &s
, cstate
->minorversion
, nn
);
3658 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3661 switch (s
->sc_type
) {
3662 case NFS4_DELEG_STID
:
3663 dp
= delegstateid(s
);
3664 status
= nfs4_check_delegmode(dp
, flags
);
3668 *filpp
= dp
->dl_file
->fi_deleg_file
;
3671 status
= nfserr_serverfault
;
3676 case NFS4_OPEN_STID
:
3677 case NFS4_LOCK_STID
:
3678 stp
= openlockstateid(s
);
3679 status
= nfs4_check_fh(current_fh
, stp
);
3682 if (stp
->st_stateowner
->so_is_open_owner
3683 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3685 status
= nfs4_check_openmode(stp
, flags
);
3689 if (flags
& RD_STATE
)
3690 *filpp
= find_readable_file(stp
->st_file
);
3692 *filpp
= find_writeable_file(stp
->st_file
);
3696 return nfserr_bad_stateid
;
3704 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3706 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3707 return nfserr_locks_held
;
3708 release_lock_stateid(stp
);
3713 * Test if the stateid is valid
3716 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3717 struct nfsd4_test_stateid
*test_stateid
)
3719 struct nfsd4_test_stateid_id
*stateid
;
3720 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3723 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3724 stateid
->ts_id_status
=
3725 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3726 nfs4_unlock_state();
3732 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3733 struct nfsd4_free_stateid
*free_stateid
)
3735 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3736 struct nfs4_stid
*s
;
3737 struct nfs4_delegation
*dp
;
3738 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3739 __be32 ret
= nfserr_bad_stateid
;
3742 s
= find_stateid(cl
, stateid
);
3745 switch (s
->sc_type
) {
3746 case NFS4_DELEG_STID
:
3747 ret
= nfserr_locks_held
;
3749 case NFS4_OPEN_STID
:
3750 case NFS4_LOCK_STID
:
3751 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3754 if (s
->sc_type
== NFS4_LOCK_STID
)
3755 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3757 ret
= nfserr_locks_held
;
3759 case NFS4_REVOKED_DELEG_STID
:
3760 dp
= delegstateid(s
);
3761 destroy_revoked_delegation(dp
);
3765 ret
= nfserr_bad_stateid
;
3768 nfs4_unlock_state();
3775 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3776 RD_STATE
: WR_STATE
;
3779 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3781 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3782 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3785 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3788 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3789 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3791 * "Closed" stateid's exist *only* to return
3792 * nfserr_replay_me from the previous step, and
3793 * revoked delegations are kept only for free_stateid.
3795 return nfserr_bad_stateid
;
3796 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3799 return nfs4_check_fh(current_fh
, stp
);
3803 * Checks for sequence id mutating operations.
3806 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3807 stateid_t
*stateid
, char typemask
,
3808 struct nfs4_ol_stateid
**stpp
,
3809 struct nfsd_net
*nn
)
3812 struct nfs4_stid
*s
;
3814 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3815 seqid
, STATEID_VAL(stateid
));
3818 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3819 cstate
->minorversion
, nn
);
3822 *stpp
= openlockstateid(s
);
3823 if (!nfsd4_has_session(cstate
))
3824 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3826 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3829 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3830 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3833 struct nfs4_openowner
*oo
;
3835 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3836 NFS4_OPEN_STID
, stpp
, nn
);
3839 oo
= openowner((*stpp
)->st_stateowner
);
3840 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3841 return nfserr_bad_stateid
;
3846 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3847 struct nfsd4_open_confirm
*oc
)
3850 struct nfs4_openowner
*oo
;
3851 struct nfs4_ol_stateid
*stp
;
3852 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3854 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
3855 cstate
->current_fh
.fh_dentry
);
3857 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3863 status
= nfs4_preprocess_seqid_op(cstate
,
3864 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3865 NFS4_OPEN_STID
, &stp
, nn
);
3868 oo
= openowner(stp
->st_stateowner
);
3869 status
= nfserr_bad_stateid
;
3870 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3872 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3873 update_stateid(&stp
->st_stid
.sc_stateid
);
3874 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3875 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3876 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3878 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3881 nfsd4_bump_seqid(cstate
, status
);
3882 if (!cstate
->replay_owner
)
3883 nfs4_unlock_state();
3887 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3889 if (!test_access(access
, stp
))
3891 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3892 clear_access(access
, stp
);
3895 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3897 switch (to_access
) {
3898 case NFS4_SHARE_ACCESS_READ
:
3899 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3900 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3902 case NFS4_SHARE_ACCESS_WRITE
:
3903 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3904 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3906 case NFS4_SHARE_ACCESS_BOTH
:
3914 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3917 for (i
= 0; i
< 4; i
++) {
3918 if ((i
& deny
) != i
)
3924 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3925 struct nfsd4_compound_state
*cstate
,
3926 struct nfsd4_open_downgrade
*od
)
3929 struct nfs4_ol_stateid
*stp
;
3930 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3932 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
3933 cstate
->current_fh
.fh_dentry
);
3935 /* We don't yet support WANT bits: */
3936 if (od
->od_deleg_want
)
3937 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3941 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3942 &od
->od_stateid
, &stp
, nn
);
3945 status
= nfserr_inval
;
3946 if (!test_access(od
->od_share_access
, stp
)) {
3947 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3948 stp
->st_access_bmap
, od
->od_share_access
);
3951 if (!test_deny(od
->od_share_deny
, stp
)) {
3952 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3953 stp
->st_deny_bmap
, od
->od_share_deny
);
3956 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3958 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3960 update_stateid(&stp
->st_stid
.sc_stateid
);
3961 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3964 nfsd4_bump_seqid(cstate
, status
);
3965 if (!cstate
->replay_owner
)
3966 nfs4_unlock_state();
3970 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3972 unhash_open_stateid(s
);
3973 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3977 * nfs4_unlock_state() called after encode
3980 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3981 struct nfsd4_close
*close
)
3984 struct nfs4_openowner
*oo
;
3985 struct nfs4_ol_stateid
*stp
;
3986 struct net
*net
= SVC_NET(rqstp
);
3987 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3989 dprintk("NFSD: nfsd4_close on file %pd\n",
3990 cstate
->current_fh
.fh_dentry
);
3993 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3995 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3997 nfsd4_bump_seqid(cstate
, status
);
4000 oo
= openowner(stp
->st_stateowner
);
4001 update_stateid(&stp
->st_stid
.sc_stateid
);
4002 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4004 nfsd4_close_open_stateid(stp
);
4006 if (cstate
->minorversion
)
4007 free_generic_stateid(stp
);
4009 oo
->oo_last_closed_stid
= stp
;
4011 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
4012 if (cstate
->minorversion
)
4013 release_openowner(oo
);
4016 * In the 4.0 case we need to keep the owners around a
4017 * little while to handle CLOSE replay.
4019 move_to_close_lru(oo
, SVC_NET(rqstp
));
4023 if (!cstate
->replay_owner
)
4024 nfs4_unlock_state();
4029 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4030 struct nfsd4_delegreturn
*dr
)
4032 struct nfs4_delegation
*dp
;
4033 stateid_t
*stateid
= &dr
->dr_stateid
;
4034 struct nfs4_stid
*s
;
4036 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4038 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4042 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4043 cstate
->minorversion
, nn
);
4046 dp
= delegstateid(s
);
4047 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4051 destroy_delegation(dp
);
4053 nfs4_unlock_state();
4059 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4061 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4064 end_offset(u64 start
, u64 len
)
4069 return end
>= start
? end
: NFS4_MAX_UINT64
;
4072 /* last octet in a range */
4074 last_byte_offset(u64 start
, u64 len
)
4080 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4083 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4085 return (file_hashval(inode
) + cl_id
4086 + opaque_hashval(ownername
->data
, ownername
->len
))
4087 & LOCKOWNER_INO_HASH_MASK
;
4091 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4092 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4093 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4094 * locking, this prevents us from being completely protocol-compliant. The
4095 * real solution to this problem is to start using unsigned file offsets in
4096 * the VFS, but this is a very deep change!
4099 nfs4_transform_lock_offset(struct file_lock
*lock
)
4101 if (lock
->fl_start
< 0)
4102 lock
->fl_start
= OFFSET_MAX
;
4103 if (lock
->fl_end
< 0)
4104 lock
->fl_end
= OFFSET_MAX
;
4107 /* Hack!: For now, we're defining this just so we can use a pointer to it
4108 * as a unique cookie to identify our (NFSv4's) posix locks. */
4109 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4113 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4115 struct nfs4_lockowner
*lo
;
4117 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4118 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4119 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4120 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4121 if (!deny
->ld_owner
.data
)
4122 /* We just don't care that much */
4124 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4125 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4128 deny
->ld_owner
.len
= 0;
4129 deny
->ld_owner
.data
= NULL
;
4130 deny
->ld_clientid
.cl_boot
= 0;
4131 deny
->ld_clientid
.cl_id
= 0;
4133 deny
->ld_start
= fl
->fl_start
;
4134 deny
->ld_length
= NFS4_MAX_UINT64
;
4135 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4136 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4137 deny
->ld_type
= NFS4_READ_LT
;
4138 if (fl
->fl_type
!= F_RDLCK
)
4139 deny
->ld_type
= NFS4_WRITE_LT
;
4142 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4144 struct nfs4_ol_stateid
*lst
;
4146 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4148 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4149 struct nfs4_ol_stateid
, st_perstateowner
);
4150 return lst
->st_file
->fi_inode
== inode
;
4153 static struct nfs4_lockowner
*
4154 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4155 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4157 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4158 struct nfs4_lockowner
*lo
;
4160 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4161 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4167 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4169 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4170 unsigned int inohash
= lockowner_ino_hashval(inode
,
4171 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4172 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4174 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4175 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4176 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4180 * Alloc a lock owner structure.
4181 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4184 * strhashval = ownerstr_hashval
4187 static struct nfs4_lockowner
*
4188 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4189 struct nfs4_lockowner
*lo
;
4191 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4194 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4195 lo
->lo_owner
.so_is_open_owner
= 0;
4196 /* It is the openowner seqid that will be incremented in encode in the
4197 * case of new lockowners; so increment the lock seqid manually: */
4198 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4199 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4203 static struct nfs4_ol_stateid
*
4204 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4206 struct nfs4_ol_stateid
*stp
;
4207 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4209 stp
= nfs4_alloc_stateid(clp
);
4212 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4213 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4214 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4215 stp
->st_stateowner
= &lo
->lo_owner
;
4218 stp
->st_access_bmap
= 0;
4219 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4220 stp
->st_openstp
= open_stp
;
4225 check_lock_length(u64 offset
, u64 length
)
4227 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4228 LOFF_OVERFLOW(offset
, length
)));
4231 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4233 struct nfs4_file
*fp
= lock_stp
->st_file
;
4234 int oflag
= nfs4_access_to_omode(access
);
4236 if (test_access(access
, lock_stp
))
4238 nfs4_file_get_access(fp
, oflag
);
4239 set_access(access
, lock_stp
);
4242 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)
4244 struct nfs4_file
*fi
= ost
->st_file
;
4245 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4246 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4247 struct nfs4_lockowner
*lo
;
4248 unsigned int strhashval
;
4249 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4251 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4252 &lock
->v
.new.owner
, nn
);
4254 if (!cstate
->minorversion
)
4255 return nfserr_bad_seqid
;
4256 /* XXX: a lockowner always has exactly one stateid: */
4257 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4258 struct nfs4_ol_stateid
, st_perstateowner
);
4261 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4262 &lock
->v
.new.owner
);
4263 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4265 return nfserr_jukebox
;
4266 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4268 release_lockowner(lo
);
4269 return nfserr_jukebox
;
4279 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4280 struct nfsd4_lock
*lock
)
4282 struct nfs4_openowner
*open_sop
= NULL
;
4283 struct nfs4_lockowner
*lock_sop
= NULL
;
4284 struct nfs4_ol_stateid
*lock_stp
;
4285 struct file
*filp
= NULL
;
4286 struct file_lock
*file_lock
= NULL
;
4287 struct file_lock
*conflock
= NULL
;
4289 bool new_state
= false;
4292 struct net
*net
= SVC_NET(rqstp
);
4293 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4295 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4296 (long long) lock
->lk_offset
,
4297 (long long) lock
->lk_length
);
4299 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4300 return nfserr_inval
;
4302 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4303 S_IFREG
, NFSD_MAY_LOCK
))) {
4304 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4310 if (lock
->lk_is_new
) {
4311 struct nfs4_ol_stateid
*open_stp
= NULL
;
4313 if (nfsd4_has_session(cstate
))
4314 /* See rfc 5661 18.10.3: given clientid is ignored: */
4315 memcpy(&lock
->v
.new.clientid
,
4316 &cstate
->session
->se_client
->cl_clientid
,
4317 sizeof(clientid_t
));
4319 status
= nfserr_stale_clientid
;
4320 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4323 /* validate and update open stateid and open seqid */
4324 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4325 lock
->lk_new_open_seqid
,
4326 &lock
->lk_new_open_stateid
,
4330 open_sop
= openowner(open_stp
->st_stateowner
);
4331 status
= nfserr_bad_stateid
;
4332 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4333 &lock
->v
.new.clientid
))
4335 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4336 &lock_stp
, &new_state
);
4338 status
= nfs4_preprocess_seqid_op(cstate
,
4339 lock
->lk_old_lock_seqid
,
4340 &lock
->lk_old_lock_stateid
,
4341 NFS4_LOCK_STID
, &lock_stp
, nn
);
4344 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4346 lkflg
= setlkflg(lock
->lk_type
);
4347 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4351 status
= nfserr_grace
;
4352 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4354 status
= nfserr_no_grace
;
4355 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4358 file_lock
= locks_alloc_lock();
4360 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4361 status
= nfserr_jukebox
;
4365 locks_init_lock(file_lock
);
4366 switch (lock
->lk_type
) {
4369 filp
= find_readable_file(lock_stp
->st_file
);
4371 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4372 file_lock
->fl_type
= F_RDLCK
;
4375 case NFS4_WRITEW_LT
:
4376 filp
= find_writeable_file(lock_stp
->st_file
);
4378 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4379 file_lock
->fl_type
= F_WRLCK
;
4382 status
= nfserr_inval
;
4386 status
= nfserr_openmode
;
4389 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4390 file_lock
->fl_pid
= current
->tgid
;
4391 file_lock
->fl_file
= filp
;
4392 file_lock
->fl_flags
= FL_POSIX
;
4393 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4394 file_lock
->fl_start
= lock
->lk_offset
;
4395 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4396 nfs4_transform_lock_offset(file_lock
);
4398 conflock
= locks_alloc_lock();
4400 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4401 status
= nfserr_jukebox
;
4405 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4407 case 0: /* success! */
4408 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4409 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4413 case (EAGAIN
): /* conflock holds conflicting lock */
4414 status
= nfserr_denied
;
4415 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4416 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4419 status
= nfserr_deadlock
;
4422 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4423 status
= nfserrno(err
);
4427 if (status
&& new_state
)
4428 release_lockowner(lock_sop
);
4429 nfsd4_bump_seqid(cstate
, status
);
4430 if (!cstate
->replay_owner
)
4431 nfs4_unlock_state();
4433 locks_free_lock(file_lock
);
4435 locks_free_lock(conflock
);
4440 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4441 * so we do a temporary open here just to get an open file to pass to
4442 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4445 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4448 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4450 err
= nfserrno(vfs_test_lock(file
, lock
));
4460 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4461 struct nfsd4_lockt
*lockt
)
4463 struct inode
*inode
;
4464 struct file_lock
*file_lock
= NULL
;
4465 struct nfs4_lockowner
*lo
;
4467 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4469 if (locks_in_grace(SVC_NET(rqstp
)))
4470 return nfserr_grace
;
4472 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4473 return nfserr_inval
;
4477 if (!nfsd4_has_session(cstate
)) {
4478 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4483 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4486 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4487 file_lock
= locks_alloc_lock();
4489 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4490 status
= nfserr_jukebox
;
4493 locks_init_lock(file_lock
);
4494 switch (lockt
->lt_type
) {
4497 file_lock
->fl_type
= F_RDLCK
;
4500 case NFS4_WRITEW_LT
:
4501 file_lock
->fl_type
= F_WRLCK
;
4504 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4505 status
= nfserr_inval
;
4509 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4511 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4512 file_lock
->fl_pid
= current
->tgid
;
4513 file_lock
->fl_flags
= FL_POSIX
;
4515 file_lock
->fl_start
= lockt
->lt_offset
;
4516 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4518 nfs4_transform_lock_offset(file_lock
);
4520 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4524 if (file_lock
->fl_type
!= F_UNLCK
) {
4525 status
= nfserr_denied
;
4526 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4529 nfs4_unlock_state();
4531 locks_free_lock(file_lock
);
4536 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4537 struct nfsd4_locku
*locku
)
4539 struct nfs4_ol_stateid
*stp
;
4540 struct file
*filp
= NULL
;
4541 struct file_lock
*file_lock
= NULL
;
4544 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4546 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4547 (long long) locku
->lu_offset
,
4548 (long long) locku
->lu_length
);
4550 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4551 return nfserr_inval
;
4555 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4556 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4560 filp
= find_any_file(stp
->st_file
);
4562 status
= nfserr_lock_range
;
4565 file_lock
= locks_alloc_lock();
4567 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4568 status
= nfserr_jukebox
;
4571 locks_init_lock(file_lock
);
4572 file_lock
->fl_type
= F_UNLCK
;
4573 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4574 file_lock
->fl_pid
= current
->tgid
;
4575 file_lock
->fl_file
= filp
;
4576 file_lock
->fl_flags
= FL_POSIX
;
4577 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4578 file_lock
->fl_start
= locku
->lu_offset
;
4580 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4582 nfs4_transform_lock_offset(file_lock
);
4584 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4586 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4589 update_stateid(&stp
->st_stid
.sc_stateid
);
4590 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4593 nfsd4_bump_seqid(cstate
, status
);
4594 if (!cstate
->replay_owner
)
4595 nfs4_unlock_state();
4597 locks_free_lock(file_lock
);
4601 status
= nfserrno(err
);
4607 * 1: locks held by lockowner
4608 * 0: no locks held by lockowner
4611 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4613 struct file_lock
**flpp
;
4614 struct inode
*inode
= filp
->fi_inode
;
4617 spin_lock(&inode
->i_lock
);
4618 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4619 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4625 spin_unlock(&inode
->i_lock
);
4630 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4631 struct nfsd4_compound_state
*cstate
,
4632 struct nfsd4_release_lockowner
*rlockowner
)
4634 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4635 struct nfs4_stateowner
*sop
;
4636 struct nfs4_lockowner
*lo
;
4637 struct nfs4_ol_stateid
*stp
;
4638 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4639 struct list_head matches
;
4640 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4642 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4644 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4645 clid
->cl_boot
, clid
->cl_id
);
4649 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4653 status
= nfserr_locks_held
;
4654 INIT_LIST_HEAD(&matches
);
4656 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4657 if (sop
->so_is_open_owner
)
4659 if (!same_owner_str(sop
, owner
, clid
))
4661 list_for_each_entry(stp
, &sop
->so_stateids
,
4663 lo
= lockowner(sop
);
4664 if (check_for_locks(stp
->st_file
, lo
))
4666 list_add(&lo
->lo_list
, &matches
);
4669 /* Clients probably won't expect us to return with some (but not all)
4670 * of the lockowner state released; so don't release any until all
4671 * have been checked. */
4673 while (!list_empty(&matches
)) {
4674 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4676 /* unhash_stateowner deletes so_perclient only
4677 * for openowners. */
4678 list_del(&lo
->lo_list
);
4679 release_lockowner(lo
);
4682 nfs4_unlock_state();
4686 static inline struct nfs4_client_reclaim
*
4689 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4693 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4695 struct nfs4_client_reclaim
*crp
;
4697 crp
= nfsd4_find_reclaim_client(name
, nn
);
4698 return (crp
&& crp
->cr_clp
);
4702 * failure => all reset bets are off, nfserr_no_grace...
4704 struct nfs4_client_reclaim
*
4705 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4707 unsigned int strhashval
;
4708 struct nfs4_client_reclaim
*crp
;
4710 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4711 crp
= alloc_reclaim();
4713 strhashval
= clientstr_hashval(name
);
4714 INIT_LIST_HEAD(&crp
->cr_strhash
);
4715 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4716 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4718 nn
->reclaim_str_hashtbl_size
++;
4724 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4726 list_del(&crp
->cr_strhash
);
4728 nn
->reclaim_str_hashtbl_size
--;
4732 nfs4_release_reclaim(struct nfsd_net
*nn
)
4734 struct nfs4_client_reclaim
*crp
= NULL
;
4737 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4738 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4739 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4740 struct nfs4_client_reclaim
, cr_strhash
);
4741 nfs4_remove_reclaim_record(crp
, nn
);
4744 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4748 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4749 struct nfs4_client_reclaim
*
4750 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4752 unsigned int strhashval
;
4753 struct nfs4_client_reclaim
*crp
= NULL
;
4755 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4757 strhashval
= clientstr_hashval(recdir
);
4758 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4759 if (same_name(crp
->cr_recdir
, recdir
)) {
4767 * Called from OPEN. Look for clientid in reclaim list.
4770 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4772 struct nfs4_client
*clp
;
4774 /* find clientid in conf_id_hashtbl */
4775 clp
= find_confirmed_client(clid
, sessions
, nn
);
4777 return nfserr_reclaim_bad
;
4779 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4782 #ifdef CONFIG_NFSD_FAULT_INJECTION
4784 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4786 if (mark_client_expired(clp
))
4792 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4794 char buf
[INET6_ADDRSTRLEN
];
4795 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4796 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4800 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4803 char buf
[INET6_ADDRSTRLEN
];
4804 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4805 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4808 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4810 struct nfs4_openowner
*oop
;
4811 struct nfs4_lockowner
*lop
, *lo_next
;
4812 struct nfs4_ol_stateid
*stp
, *st_next
;
4815 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4816 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4817 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4829 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4831 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4834 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4836 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4837 nfsd_print_count(clp
, count
, "locked files");
4841 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4843 struct nfs4_openowner
*oop
, *next
;
4846 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4856 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4858 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4861 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4863 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4864 nfsd_print_count(clp
, count
, "open files");
4868 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4869 struct list_head
*victims
)
4871 struct nfs4_delegation
*dp
, *next
;
4874 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4876 list_move(&dp
->dl_recall_lru
, victims
);
4883 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4885 struct nfs4_delegation
*dp
, *next
;
4889 spin_lock(&recall_lock
);
4890 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4891 spin_unlock(&recall_lock
);
4893 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4894 revoke_delegation(dp
);
4899 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4901 struct nfs4_delegation
*dp
, *next
;
4905 spin_lock(&recall_lock
);
4906 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4907 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4908 nfsd_break_one_deleg(dp
);
4909 spin_unlock(&recall_lock
);
4914 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4918 spin_lock(&recall_lock
);
4919 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4920 spin_unlock(&recall_lock
);
4922 nfsd_print_count(clp
, count
, "delegations");
4926 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4928 struct nfs4_client
*clp
, *next
;
4930 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4932 if (!nfsd_netns_ready(nn
))
4935 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4936 count
+= func(clp
, max
- count
);
4937 if ((max
!= 0) && (count
>= max
))
4944 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4946 struct nfs4_client
*clp
;
4947 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4949 if (!nfsd_netns_ready(nn
))
4952 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4953 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4959 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4961 /* initialization to perform at module load time: */
4964 nfs4_state_init(void)
4969 * Since the lifetime of a delegation isn't limited to that of an open, a
4970 * client may quite reasonably hang on to a delegation as long as it has
4971 * the inode cached. This becomes an obvious problem the first time a
4972 * client's inode cache approaches the size of the server's total memory.
4974 * For now we avoid this problem by imposing a hard limit on the number
4975 * of delegations, which varies according to the server's memory size.
4978 set_max_delegations(void)
4981 * Allow at most 4 delegations per megabyte of RAM. Quick
4982 * estimates suggest that in the worst case (where every delegation
4983 * is for a different inode), a delegation could take about 1.5K,
4984 * giving a worst case usage of about 6% of memory.
4986 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4989 static int nfs4_state_create_net(struct net
*net
)
4991 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4994 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4995 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4996 if (!nn
->conf_id_hashtbl
)
4998 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4999 CLIENT_HASH_SIZE
, GFP_KERNEL
);
5000 if (!nn
->unconf_id_hashtbl
)
5002 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
5003 OWNER_HASH_SIZE
, GFP_KERNEL
);
5004 if (!nn
->ownerstr_hashtbl
)
5006 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
5007 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
5008 if (!nn
->lockowner_ino_hashtbl
)
5009 goto err_lockowner_ino
;
5010 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
5011 SESSION_HASH_SIZE
, GFP_KERNEL
);
5012 if (!nn
->sessionid_hashtbl
)
5015 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5016 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5017 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5019 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5020 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5021 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5022 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5023 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5024 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5025 nn
->conf_name_tree
= RB_ROOT
;
5026 nn
->unconf_name_tree
= RB_ROOT
;
5027 INIT_LIST_HEAD(&nn
->client_lru
);
5028 INIT_LIST_HEAD(&nn
->close_lru
);
5029 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5030 spin_lock_init(&nn
->client_lock
);
5032 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5038 kfree(nn
->lockowner_ino_hashtbl
);
5040 kfree(nn
->ownerstr_hashtbl
);
5042 kfree(nn
->unconf_id_hashtbl
);
5044 kfree(nn
->conf_id_hashtbl
);
5050 nfs4_state_destroy_net(struct net
*net
)
5053 struct nfs4_client
*clp
= NULL
;
5054 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5055 struct rb_node
*node
, *tmp
;
5057 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5058 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5059 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5060 destroy_client(clp
);
5064 node
= rb_first(&nn
->unconf_name_tree
);
5065 while (node
!= NULL
) {
5067 node
= rb_next(tmp
);
5068 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
5069 rb_erase(tmp
, &nn
->unconf_name_tree
);
5070 destroy_client(clp
);
5073 kfree(nn
->sessionid_hashtbl
);
5074 kfree(nn
->lockowner_ino_hashtbl
);
5075 kfree(nn
->ownerstr_hashtbl
);
5076 kfree(nn
->unconf_id_hashtbl
);
5077 kfree(nn
->conf_id_hashtbl
);
5082 nfs4_state_start_net(struct net
*net
)
5084 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5087 ret
= nfs4_state_create_net(net
);
5090 nfsd4_client_tracking_init(net
);
5091 nn
->boot_time
= get_seconds();
5092 locks_start_grace(net
, &nn
->nfsd4_manager
);
5093 nn
->grace_ended
= false;
5094 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5095 nn
->nfsd4_grace
, net
);
5096 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5100 /* initialization to perform when the nfsd service is started: */
5103 nfs4_state_start(void)
5107 ret
= set_callback_cred();
5110 laundry_wq
= create_singlethread_workqueue("nfsd4");
5111 if (laundry_wq
== NULL
) {
5115 ret
= nfsd4_create_callback_queue();
5117 goto out_free_laundry
;
5119 set_max_delegations();
5124 destroy_workqueue(laundry_wq
);
5130 nfs4_state_shutdown_net(struct net
*net
)
5132 struct nfs4_delegation
*dp
= NULL
;
5133 struct list_head
*pos
, *next
, reaplist
;
5134 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5136 cancel_delayed_work_sync(&nn
->laundromat_work
);
5137 locks_end_grace(&nn
->nfsd4_manager
);
5140 INIT_LIST_HEAD(&reaplist
);
5141 spin_lock(&recall_lock
);
5142 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5143 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5144 list_move(&dp
->dl_recall_lru
, &reaplist
);
5146 spin_unlock(&recall_lock
);
5147 list_for_each_safe(pos
, next
, &reaplist
) {
5148 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5149 destroy_delegation(dp
);
5152 nfsd4_client_tracking_exit(net
);
5153 nfs4_state_destroy_net(net
);
5154 nfs4_unlock_state();
5158 nfs4_state_shutdown(void)
5160 destroy_workqueue(laundry_wq
);
5161 nfsd4_destroy_callback_queue();
5165 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5167 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5168 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5172 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5174 if (cstate
->minorversion
) {
5175 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5176 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5181 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5183 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5187 * functions to set current state id
5190 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5192 put_stateid(cstate
, &odp
->od_stateid
);
5196 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5198 put_stateid(cstate
, &open
->op_stateid
);
5202 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5204 put_stateid(cstate
, &close
->cl_stateid
);
5208 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5210 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5214 * functions to consume current state id
5218 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5220 get_stateid(cstate
, &odp
->od_stateid
);
5224 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5226 get_stateid(cstate
, &drp
->dr_stateid
);
5230 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5232 get_stateid(cstate
, &fsp
->fr_stateid
);
5236 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5238 get_stateid(cstate
, &setattr
->sa_stateid
);
5242 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5244 get_stateid(cstate
, &close
->cl_stateid
);
5248 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5250 get_stateid(cstate
, &locku
->lu_stateid
);
5254 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5256 get_stateid(cstate
, &read
->rd_stateid
);
5260 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5262 get_stateid(cstate
, &write
->wr_stateid
);