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
;
371 struct nfs4_file
*fp
= stp
->st_file
;
373 dprintk("NFSD alloc_init_deleg\n");
374 if (fp
->fi_had_conflict
)
376 if (num_delegations
> max_delegations
)
378 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
381 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
383 * delegation seqid's are never incremented. The 4.1 special
384 * meaning of seqid 0 isn't meaningful, really, but let's avoid
385 * 0 anyway just for consistency and use 1:
387 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
389 INIT_LIST_HEAD(&dp
->dl_perfile
);
390 INIT_LIST_HEAD(&dp
->dl_perclnt
);
391 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
394 dp
->dl_type
= NFS4_OPEN_DELEGATE_READ
;
395 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
397 atomic_set(&dp
->dl_count
, 1);
398 nfsd4_init_callback(&dp
->dl_recall
);
402 static void remove_stid(struct nfs4_stid
*s
)
404 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
406 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
410 nfs4_put_delegation(struct nfs4_delegation
*dp
)
412 if (atomic_dec_and_test(&dp
->dl_count
)) {
413 kmem_cache_free(deleg_slab
, dp
);
418 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
420 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
421 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
423 fput(fp
->fi_deleg_file
);
424 fp
->fi_deleg_file
= NULL
;
428 static void unhash_stid(struct nfs4_stid
*s
)
433 /* Called under the state lock. */
435 unhash_delegation(struct nfs4_delegation
*dp
)
437 list_del_init(&dp
->dl_perclnt
);
438 spin_lock(&recall_lock
);
439 list_del_init(&dp
->dl_perfile
);
440 list_del_init(&dp
->dl_recall_lru
);
441 spin_unlock(&recall_lock
);
442 nfs4_put_deleg_lease(dp
->dl_file
);
443 put_nfs4_file(dp
->dl_file
);
449 static void destroy_revoked_delegation(struct nfs4_delegation
*dp
)
451 list_del_init(&dp
->dl_recall_lru
);
452 remove_stid(&dp
->dl_stid
);
453 nfs4_put_delegation(dp
);
456 static void destroy_delegation(struct nfs4_delegation
*dp
)
458 unhash_delegation(dp
);
459 remove_stid(&dp
->dl_stid
);
460 nfs4_put_delegation(dp
);
463 static void revoke_delegation(struct nfs4_delegation
*dp
)
465 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
467 if (clp
->cl_minorversion
== 0)
468 destroy_delegation(dp
);
470 unhash_delegation(dp
);
471 dp
->dl_stid
.sc_type
= NFS4_REVOKED_DELEG_STID
;
472 list_add(&dp
->dl_recall_lru
, &clp
->cl_revoked
);
480 static unsigned int clientid_hashval(u32 id
)
482 return id
& CLIENT_HASH_MASK
;
485 static unsigned int clientstr_hashval(const char *name
)
487 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
491 * We store the NONE, READ, WRITE, and BOTH bits separately in the
492 * st_{access,deny}_bmap field of the stateid, in order to track not
493 * only what share bits are currently in force, but also what
494 * combinations of share bits previous opens have used. This allows us
495 * to enforce the recommendation of rfc 3530 14.2.19 that the server
496 * return an error if the client attempt to downgrade to a combination
497 * of share bits not explicable by closing some of its previous opens.
499 * XXX: This enforcement is actually incomplete, since we don't keep
500 * track of access/deny bit combinations; so, e.g., we allow:
502 * OPEN allow read, deny write
503 * OPEN allow both, deny none
504 * DOWNGRADE allow read, deny none
506 * which we should reject.
509 bmap_to_share_mode(unsigned long bmap
) {
511 unsigned int access
= 0;
513 for (i
= 1; i
< 4; i
++) {
514 if (test_bit(i
, &bmap
))
521 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
522 unsigned int access
, deny
;
524 access
= bmap_to_share_mode(stp
->st_access_bmap
);
525 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
526 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
531 /* set share access for a given stateid */
533 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
535 __set_bit(access
, &stp
->st_access_bmap
);
538 /* clear share access for a given stateid */
540 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
542 __clear_bit(access
, &stp
->st_access_bmap
);
545 /* test whether a given stateid has access */
547 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
549 return test_bit(access
, &stp
->st_access_bmap
);
552 /* set share deny for a given stateid */
554 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
556 __set_bit(access
, &stp
->st_deny_bmap
);
559 /* clear share deny for a given stateid */
561 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
563 __clear_bit(access
, &stp
->st_deny_bmap
);
566 /* test whether a given stateid is denying specific access */
568 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
570 return test_bit(access
, &stp
->st_deny_bmap
);
573 static int nfs4_access_to_omode(u32 access
)
575 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
576 case NFS4_SHARE_ACCESS_READ
:
578 case NFS4_SHARE_ACCESS_WRITE
:
580 case NFS4_SHARE_ACCESS_BOTH
:
587 /* release all access and file references for a given stateid */
589 release_all_access(struct nfs4_ol_stateid
*stp
)
593 for (i
= 1; i
< 4; i
++) {
594 if (test_access(i
, stp
))
595 nfs4_file_put_access(stp
->st_file
,
596 nfs4_access_to_omode(i
));
597 clear_access(i
, stp
);
601 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
603 list_del(&stp
->st_perfile
);
604 list_del(&stp
->st_perstateowner
);
607 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
609 release_all_access(stp
);
610 put_nfs4_file(stp
->st_file
);
614 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
616 remove_stid(&stp
->st_stid
);
617 kmem_cache_free(stateid_slab
, stp
);
620 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
624 unhash_generic_stateid(stp
);
625 unhash_stid(&stp
->st_stid
);
626 file
= find_any_file(stp
->st_file
);
628 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
629 close_generic_stateid(stp
);
630 free_generic_stateid(stp
);
633 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
635 struct nfs4_ol_stateid
*stp
;
637 list_del(&lo
->lo_owner
.so_strhash
);
638 list_del(&lo
->lo_perstateid
);
639 list_del(&lo
->lo_owner_ino_hash
);
640 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
641 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
642 struct nfs4_ol_stateid
, st_perstateowner
);
643 release_lock_stateid(stp
);
647 static void release_lockowner(struct nfs4_lockowner
*lo
)
649 unhash_lockowner(lo
);
650 nfs4_free_lockowner(lo
);
654 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
656 struct nfs4_lockowner
*lo
;
658 while (!list_empty(&open_stp
->st_lockowners
)) {
659 lo
= list_entry(open_stp
->st_lockowners
.next
,
660 struct nfs4_lockowner
, lo_perstateid
);
661 release_lockowner(lo
);
665 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
667 unhash_generic_stateid(stp
);
668 release_stateid_lockowners(stp
);
669 close_generic_stateid(stp
);
672 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
674 unhash_open_stateid(stp
);
675 unhash_stid(&stp
->st_stid
);
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 unhash_stid(&s
->st_stid
);
698 free_generic_stateid(s
);
699 oo
->oo_last_closed_stid
= NULL
;
703 static void release_openowner(struct nfs4_openowner
*oo
)
705 unhash_openowner(oo
);
706 list_del(&oo
->oo_close_lru
);
707 release_last_closed_stateid(oo
);
708 nfs4_free_openowner(oo
);
712 hash_sessionid(struct nfs4_sessionid
*sessionid
)
714 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
716 return sid
->sequence
% SESSION_HASH_SIZE
;
721 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
723 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
724 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
728 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
734 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
735 * won't be used for replay.
737 void nfsd4_bump_seqid(struct nfsd4_compound_state
*cstate
, __be32 nfserr
)
739 struct nfs4_stateowner
*so
= cstate
->replay_owner
;
741 if (nfserr
== nfserr_replay_me
)
744 if (!seqid_mutating_err(ntohl(nfserr
))) {
745 cstate
->replay_owner
= NULL
;
750 if (so
->so_is_open_owner
)
751 release_last_closed_stateid(openowner(so
));
757 gen_sessionid(struct nfsd4_session
*ses
)
759 struct nfs4_client
*clp
= ses
->se_client
;
760 struct nfsd4_sessionid
*sid
;
762 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
763 sid
->clientid
= clp
->cl_clientid
;
764 sid
->sequence
= current_sessionid
++;
769 * The protocol defines ca_maxresponssize_cached to include the size of
770 * the rpc header, but all we need to cache is the data starting after
771 * the end of the initial SEQUENCE operation--the rest we regenerate
772 * each time. Therefore we can advertise a ca_maxresponssize_cached
773 * value that is the number of bytes in our cache plus a few additional
774 * bytes. In order to stay on the safe side, and not promise more than
775 * we can cache, those additional bytes must be the minimum possible: 24
776 * bytes of rpc header (xid through accept state, with AUTH_NULL
777 * verifier), 12 for the compound header (with zero-length tag), and 44
778 * for the SEQUENCE op response:
780 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
783 free_session_slots(struct nfsd4_session
*ses
)
787 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
788 kfree(ses
->se_slots
[i
]);
792 * We don't actually need to cache the rpc and session headers, so we
793 * can allocate a little less for each slot:
795 static inline u32
slot_bytes(struct nfsd4_channel_attrs
*ca
)
799 if (ca
->maxresp_cached
< NFSD_MIN_HDR_SEQ_SZ
)
802 size
= ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
803 return size
+ sizeof(struct nfsd4_slot
);
807 * XXX: If we run out of reserved DRC memory we could (up to a point)
808 * re-negotiate active sessions and reduce their slot usage to make
809 * room for new connections. For now we just fail the create session.
811 static u32
nfsd4_get_drc_mem(struct nfsd4_channel_attrs
*ca
)
813 u32 slotsize
= slot_bytes(ca
);
814 u32 num
= ca
->maxreqs
;
817 spin_lock(&nfsd_drc_lock
);
818 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
819 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
820 num
= min_t(int, num
, avail
/ slotsize
);
821 nfsd_drc_mem_used
+= num
* slotsize
;
822 spin_unlock(&nfsd_drc_lock
);
827 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs
*ca
)
829 int slotsize
= slot_bytes(ca
);
831 spin_lock(&nfsd_drc_lock
);
832 nfsd_drc_mem_used
-= slotsize
* ca
->maxreqs
;
833 spin_unlock(&nfsd_drc_lock
);
836 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*attrs
)
838 int numslots
= attrs
->maxreqs
;
839 int slotsize
= slot_bytes(attrs
);
840 struct nfsd4_session
*new;
843 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
844 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
845 mem
= numslots
* sizeof(struct nfsd4_slot
*);
847 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
850 /* allocate each struct nfsd4_slot and data cache in one piece */
851 for (i
= 0; i
< numslots
; i
++) {
852 new->se_slots
[i
] = kzalloc(slotsize
, GFP_KERNEL
);
853 if (!new->se_slots
[i
])
859 kfree(new->se_slots
[i
]);
864 static void free_conn(struct nfsd4_conn
*c
)
866 svc_xprt_put(c
->cn_xprt
);
870 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
872 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
873 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
875 spin_lock(&clp
->cl_lock
);
876 if (!list_empty(&c
->cn_persession
)) {
877 list_del(&c
->cn_persession
);
880 nfsd4_probe_callback(clp
);
881 spin_unlock(&clp
->cl_lock
);
884 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
886 struct nfsd4_conn
*conn
;
888 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
891 svc_xprt_get(rqstp
->rq_xprt
);
892 conn
->cn_xprt
= rqstp
->rq_xprt
;
893 conn
->cn_flags
= flags
;
894 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
898 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
900 conn
->cn_session
= ses
;
901 list_add(&conn
->cn_persession
, &ses
->se_conns
);
904 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
906 struct nfs4_client
*clp
= ses
->se_client
;
908 spin_lock(&clp
->cl_lock
);
909 __nfsd4_hash_conn(conn
, ses
);
910 spin_unlock(&clp
->cl_lock
);
913 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
915 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
916 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
919 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
923 nfsd4_hash_conn(conn
, ses
);
924 ret
= nfsd4_register_conn(conn
);
926 /* oops; xprt is already down: */
927 nfsd4_conn_lost(&conn
->cn_xpt_user
);
928 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
929 /* callback channel may be back up */
930 nfsd4_probe_callback(ses
->se_client
);
934 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
936 u32 dir
= NFS4_CDFC4_FORE
;
938 if (cses
->flags
& SESSION4_BACK_CHAN
)
939 dir
|= NFS4_CDFC4_BACK
;
940 return alloc_conn(rqstp
, dir
);
943 /* must be called under client_lock */
944 static void nfsd4_del_conns(struct nfsd4_session
*s
)
946 struct nfs4_client
*clp
= s
->se_client
;
947 struct nfsd4_conn
*c
;
949 spin_lock(&clp
->cl_lock
);
950 while (!list_empty(&s
->se_conns
)) {
951 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
952 list_del_init(&c
->cn_persession
);
953 spin_unlock(&clp
->cl_lock
);
955 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
958 spin_lock(&clp
->cl_lock
);
960 spin_unlock(&clp
->cl_lock
);
963 static void __free_session(struct nfsd4_session
*ses
)
965 free_session_slots(ses
);
969 static void free_session(struct nfsd4_session
*ses
)
971 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
973 lockdep_assert_held(&nn
->client_lock
);
974 nfsd4_del_conns(ses
);
975 nfsd4_put_drc_mem(&ses
->se_fchannel
);
979 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
982 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
984 new->se_client
= clp
;
987 INIT_LIST_HEAD(&new->se_conns
);
989 new->se_cb_seq_nr
= 1;
990 new->se_flags
= cses
->flags
;
991 new->se_cb_prog
= cses
->callback_prog
;
992 new->se_cb_sec
= cses
->cb_sec
;
993 atomic_set(&new->se_ref
, 0);
994 idx
= hash_sessionid(&new->se_sessionid
);
995 spin_lock(&nn
->client_lock
);
996 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
997 spin_lock(&clp
->cl_lock
);
998 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
999 spin_unlock(&clp
->cl_lock
);
1000 spin_unlock(&nn
->client_lock
);
1001 memcpy(&new->se_fchannel
, &cses
->fore_channel
,
1002 sizeof(struct nfsd4_channel_attrs
));
1003 if (cses
->flags
& SESSION4_BACK_CHAN
) {
1004 struct sockaddr
*sa
= svc_addr(rqstp
);
1006 * This is a little silly; with sessions there's no real
1007 * use for the callback address. Use the peer address
1008 * as a reasonable default for now, but consider fixing
1009 * the rpc client not to require an address in the
1012 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
1013 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
1017 /* caller must hold client_lock */
1018 static struct nfsd4_session
*
1019 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
1021 struct nfsd4_session
*elem
;
1023 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1025 dump_sessionid(__func__
, sessionid
);
1026 idx
= hash_sessionid(sessionid
);
1027 /* Search in the appropriate list */
1028 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
1029 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
1030 NFS4_MAX_SESSIONID_LEN
)) {
1035 dprintk("%s: session not found\n", __func__
);
1039 /* caller must hold client_lock */
1041 unhash_session(struct nfsd4_session
*ses
)
1043 list_del(&ses
->se_hash
);
1044 spin_lock(&ses
->se_client
->cl_lock
);
1045 list_del(&ses
->se_perclnt
);
1046 spin_unlock(&ses
->se_client
->cl_lock
);
1049 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1051 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1053 if (clid
->cl_boot
== nn
->boot_time
)
1055 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1056 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1061 * XXX Should we use a slab cache ?
1062 * This type of memory management is somewhat inefficient, but we use it
1063 * anyway since SETCLIENTID is not a common operation.
1065 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1067 struct nfs4_client
*clp
;
1069 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1072 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1073 if (clp
->cl_name
.data
== NULL
) {
1077 clp
->cl_name
.len
= name
.len
;
1082 free_client(struct nfs4_client
*clp
)
1084 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1086 lockdep_assert_held(&nn
->client_lock
);
1087 while (!list_empty(&clp
->cl_sessions
)) {
1088 struct nfsd4_session
*ses
;
1089 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1091 list_del(&ses
->se_perclnt
);
1092 WARN_ON_ONCE(atomic_read(&ses
->se_ref
));
1095 free_svc_cred(&clp
->cl_cred
);
1096 kfree(clp
->cl_name
.data
);
1097 idr_destroy(&clp
->cl_stateids
);
1101 /* must be called under the client_lock */
1103 unhash_client_locked(struct nfs4_client
*clp
)
1105 struct nfsd4_session
*ses
;
1107 list_del(&clp
->cl_lru
);
1108 spin_lock(&clp
->cl_lock
);
1109 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1110 list_del_init(&ses
->se_hash
);
1111 spin_unlock(&clp
->cl_lock
);
1115 destroy_client(struct nfs4_client
*clp
)
1117 struct nfs4_openowner
*oo
;
1118 struct nfs4_delegation
*dp
;
1119 struct list_head reaplist
;
1120 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1122 INIT_LIST_HEAD(&reaplist
);
1123 spin_lock(&recall_lock
);
1124 while (!list_empty(&clp
->cl_delegations
)) {
1125 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1126 list_del_init(&dp
->dl_perclnt
);
1127 list_move(&dp
->dl_recall_lru
, &reaplist
);
1129 spin_unlock(&recall_lock
);
1130 while (!list_empty(&reaplist
)) {
1131 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1132 destroy_delegation(dp
);
1134 while (!list_empty(&clp
->cl_openowners
)) {
1135 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1136 release_openowner(oo
);
1138 nfsd4_shutdown_callback(clp
);
1139 if (clp
->cl_cb_conn
.cb_xprt
)
1140 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1141 list_del(&clp
->cl_idhash
);
1142 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1143 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1145 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1146 spin_lock(&nn
->client_lock
);
1147 unhash_client_locked(clp
);
1148 WARN_ON_ONCE(atomic_read(&clp
->cl_refcount
));
1150 spin_unlock(&nn
->client_lock
);
1153 static void expire_client(struct nfs4_client
*clp
)
1155 nfsd4_client_record_remove(clp
);
1156 destroy_client(clp
);
1159 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1161 memcpy(target
->cl_verifier
.data
, source
->data
,
1162 sizeof(target
->cl_verifier
.data
));
1165 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1167 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1168 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1171 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1173 if (source
->cr_principal
) {
1174 target
->cr_principal
=
1175 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1176 if (target
->cr_principal
== NULL
)
1179 target
->cr_principal
= NULL
;
1180 target
->cr_flavor
= source
->cr_flavor
;
1181 target
->cr_uid
= source
->cr_uid
;
1182 target
->cr_gid
= source
->cr_gid
;
1183 target
->cr_group_info
= source
->cr_group_info
;
1184 get_group_info(target
->cr_group_info
);
1185 target
->cr_gss_mech
= source
->cr_gss_mech
;
1186 if (source
->cr_gss_mech
)
1187 gss_mech_get(source
->cr_gss_mech
);
1192 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1196 res
= o1
->len
- o2
->len
;
1199 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1202 static int same_name(const char *n1
, const char *n2
)
1204 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1208 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1210 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1214 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1216 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1219 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1223 if (g1
->ngroups
!= g2
->ngroups
)
1225 for (i
=0; i
<g1
->ngroups
; i
++)
1226 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1232 * RFC 3530 language requires clid_inuse be returned when the
1233 * "principal" associated with a requests differs from that previously
1234 * used. We use uid, gid's, and gss principal string as our best
1235 * approximation. We also don't want to allow non-gss use of a client
1236 * established using gss: in theory cr_principal should catch that
1237 * change, but in practice cr_principal can be null even in the gss case
1238 * since gssd doesn't always pass down a principal string.
1240 static bool is_gss_cred(struct svc_cred
*cr
)
1242 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1243 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1248 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1250 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1251 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1252 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1253 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1255 if (cr1
->cr_principal
== cr2
->cr_principal
)
1257 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1259 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1262 static bool svc_rqst_integrity_protected(struct svc_rqst
*rqstp
)
1264 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1267 service
= gss_pseudoflavor_to_service(cr
->cr_gss_mech
, cr
->cr_flavor
);
1268 return service
== RPC_GSS_SVC_INTEGRITY
||
1269 service
== RPC_GSS_SVC_PRIVACY
;
1272 static bool mach_creds_match(struct nfs4_client
*cl
, struct svc_rqst
*rqstp
)
1274 struct svc_cred
*cr
= &rqstp
->rq_cred
;
1276 if (!cl
->cl_mach_cred
)
1278 if (cl
->cl_cred
.cr_gss_mech
!= cr
->cr_gss_mech
)
1280 if (!svc_rqst_integrity_protected(rqstp
))
1282 if (!cr
->cr_principal
)
1284 return 0 == strcmp(cl
->cl_cred
.cr_principal
, cr
->cr_principal
);
1287 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1289 static u32 current_clientid
= 1;
1291 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1292 clp
->cl_clientid
.cl_id
= current_clientid
++;
1295 static void gen_confirm(struct nfs4_client
*clp
)
1300 verf
[0] = (__be32
)get_seconds();
1301 verf
[1] = (__be32
)i
++;
1302 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1305 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1307 struct nfs4_stid
*ret
;
1309 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1310 if (!ret
|| !ret
->sc_type
)
1315 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1317 struct nfs4_stid
*s
;
1319 s
= find_stateid(cl
, t
);
1322 if (typemask
& s
->sc_type
)
1327 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1328 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1330 struct nfs4_client
*clp
;
1331 struct sockaddr
*sa
= svc_addr(rqstp
);
1333 struct net
*net
= SVC_NET(rqstp
);
1334 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1336 clp
= alloc_client(name
);
1340 INIT_LIST_HEAD(&clp
->cl_sessions
);
1341 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1343 spin_lock(&nn
->client_lock
);
1345 spin_unlock(&nn
->client_lock
);
1348 idr_init(&clp
->cl_stateids
);
1349 atomic_set(&clp
->cl_refcount
, 0);
1350 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1351 INIT_LIST_HEAD(&clp
->cl_idhash
);
1352 INIT_LIST_HEAD(&clp
->cl_openowners
);
1353 INIT_LIST_HEAD(&clp
->cl_delegations
);
1354 INIT_LIST_HEAD(&clp
->cl_lru
);
1355 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1356 INIT_LIST_HEAD(&clp
->cl_revoked
);
1357 spin_lock_init(&clp
->cl_lock
);
1358 nfsd4_init_callback(&clp
->cl_cb_null
);
1359 clp
->cl_time
= get_seconds();
1360 clear_bit(0, &clp
->cl_cb_slot_busy
);
1361 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1362 copy_verf(clp
, verf
);
1363 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1365 clp
->cl_cb_session
= NULL
;
1371 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1373 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1374 struct nfs4_client
*clp
;
1377 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1380 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1381 new = &((*new)->rb_left
);
1383 new = &((*new)->rb_right
);
1386 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1387 rb_insert_color(&new_clp
->cl_namenode
, root
);
1390 static struct nfs4_client
*
1391 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1394 struct rb_node
*node
= root
->rb_node
;
1395 struct nfs4_client
*clp
;
1398 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1399 cmp
= compare_blob(&clp
->cl_name
, name
);
1401 node
= node
->rb_left
;
1403 node
= node
->rb_right
;
1411 add_to_unconfirmed(struct nfs4_client
*clp
)
1413 unsigned int idhashval
;
1414 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1416 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1417 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1418 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1419 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1424 move_to_confirmed(struct nfs4_client
*clp
)
1426 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1427 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1429 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1430 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1431 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1432 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1433 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1437 static struct nfs4_client
*
1438 find_client_in_id_table(struct list_head
*tbl
, clientid_t
*clid
, bool sessions
)
1440 struct nfs4_client
*clp
;
1441 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1443 list_for_each_entry(clp
, &tbl
[idhashval
], cl_idhash
) {
1444 if (same_clid(&clp
->cl_clientid
, clid
)) {
1445 if ((bool)clp
->cl_minorversion
!= sessions
)
1454 static struct nfs4_client
*
1455 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1457 struct list_head
*tbl
= nn
->conf_id_hashtbl
;
1459 return find_client_in_id_table(tbl
, clid
, sessions
);
1462 static struct nfs4_client
*
1463 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1465 struct list_head
*tbl
= nn
->unconf_id_hashtbl
;
1467 return find_client_in_id_table(tbl
, clid
, sessions
);
1470 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1472 return clp
->cl_exchange_flags
!= 0;
1475 static struct nfs4_client
*
1476 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1478 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1481 static struct nfs4_client
*
1482 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1484 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1488 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1490 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1491 struct sockaddr
*sa
= svc_addr(rqstp
);
1492 u32 scopeid
= rpc_get_scope_id(sa
);
1493 unsigned short expected_family
;
1495 /* Currently, we only support tcp and tcp6 for the callback channel */
1496 if (se
->se_callback_netid_len
== 3 &&
1497 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1498 expected_family
= AF_INET
;
1499 else if (se
->se_callback_netid_len
== 4 &&
1500 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1501 expected_family
= AF_INET6
;
1505 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1506 se
->se_callback_addr_len
,
1507 (struct sockaddr
*)&conn
->cb_addr
,
1508 sizeof(conn
->cb_addr
));
1510 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1513 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1514 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1516 conn
->cb_prog
= se
->se_callback_prog
;
1517 conn
->cb_ident
= se
->se_callback_ident
;
1518 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1521 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1522 conn
->cb_addrlen
= 0;
1523 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1524 "will not receive delegations\n",
1525 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1531 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1534 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1536 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1539 dprintk("--> %s slot %p\n", __func__
, slot
);
1541 slot
->sl_opcnt
= resp
->opcnt
;
1542 slot
->sl_status
= resp
->cstate
.status
;
1544 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1545 if (nfsd4_not_cached(resp
)) {
1546 slot
->sl_datalen
= 0;
1549 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1550 base
= (char *)resp
->cstate
.datap
-
1551 (char *)resp
->xbuf
->head
[0].iov_base
;
1552 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1554 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1559 * Encode the replay sequence operation from the slot values.
1560 * If cachethis is FALSE encode the uncached rep error on the next
1561 * operation which sets resp->p and increments resp->opcnt for
1562 * nfs4svc_encode_compoundres.
1566 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1567 struct nfsd4_compoundres
*resp
)
1569 struct nfsd4_op
*op
;
1570 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1572 /* Encode the replayed sequence operation */
1573 op
= &args
->ops
[resp
->opcnt
- 1];
1574 nfsd4_encode_operation(resp
, op
);
1576 /* Return nfserr_retry_uncached_rep in next operation. */
1577 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1578 op
= &args
->ops
[resp
->opcnt
++];
1579 op
->status
= nfserr_retry_uncached_rep
;
1580 nfsd4_encode_operation(resp
, op
);
1586 * The sequence operation is not cached because we can use the slot and
1590 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1591 struct nfsd4_sequence
*seq
)
1593 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1596 dprintk("--> %s slot %p\n", __func__
, slot
);
1598 /* Either returns 0 or nfserr_retry_uncached */
1599 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1600 if (status
== nfserr_retry_uncached_rep
)
1603 /* The sequence operation has been encoded, cstate->datap set. */
1604 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1606 resp
->opcnt
= slot
->sl_opcnt
;
1607 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1608 status
= slot
->sl_status
;
1614 * Set the exchange_id flags returned by the server.
1617 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1619 /* pNFS is not supported */
1620 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1622 /* Referrals are supported, Migration is not. */
1623 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1625 /* set the wire flags to return to client. */
1626 clid
->flags
= new->cl_exchange_flags
;
1629 static bool client_has_state(struct nfs4_client
*clp
)
1632 * Note clp->cl_openowners check isn't quite right: there's no
1633 * need to count owners without stateid's.
1635 * Also note we should probably be using this in 4.0 case too.
1637 return !list_empty(&clp
->cl_openowners
)
1638 || !list_empty(&clp
->cl_delegations
)
1639 || !list_empty(&clp
->cl_sessions
);
1643 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1644 struct nfsd4_compound_state
*cstate
,
1645 struct nfsd4_exchange_id
*exid
)
1647 struct nfs4_client
*unconf
, *conf
, *new;
1649 char addr_str
[INET6_ADDRSTRLEN
];
1650 nfs4_verifier verf
= exid
->verifier
;
1651 struct sockaddr
*sa
= svc_addr(rqstp
);
1652 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1653 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1655 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1656 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1657 "ip_addr=%s flags %x, spa_how %d\n",
1658 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1659 addr_str
, exid
->flags
, exid
->spa_how
);
1661 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1662 return nfserr_inval
;
1664 switch (exid
->spa_how
) {
1666 if (!svc_rqst_integrity_protected(rqstp
))
1667 return nfserr_inval
;
1670 default: /* checked by xdr code */
1673 return nfserr_encr_alg_unsupp
;
1676 /* Cases below refer to rfc 5661 section 18.35.4: */
1678 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1680 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1681 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1684 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1685 status
= nfserr_inval
;
1688 if (!mach_creds_match(conf
, rqstp
)) {
1689 status
= nfserr_wrong_cred
;
1692 if (!creds_match
) { /* case 9 */
1693 status
= nfserr_perm
;
1696 if (!verfs_match
) { /* case 8 */
1697 status
= nfserr_not_same
;
1701 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1705 if (!creds_match
) { /* case 3 */
1706 if (client_has_state(conf
)) {
1707 status
= nfserr_clid_inuse
;
1710 expire_client(conf
);
1713 if (verfs_match
) { /* case 2 */
1714 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1718 /* case 5, client reboot */
1722 if (update
) { /* case 7 */
1723 status
= nfserr_noent
;
1727 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1728 if (unconf
) /* case 4, possible retry or client restart */
1729 expire_client(unconf
);
1731 /* case 1 (normal case) */
1733 new = create_client(exid
->clname
, rqstp
, &verf
);
1735 status
= nfserr_jukebox
;
1738 new->cl_minorversion
= cstate
->minorversion
;
1739 new->cl_mach_cred
= (exid
->spa_how
== SP4_MACH_CRED
);
1742 add_to_unconfirmed(new);
1744 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1745 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1747 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1748 nfsd4_set_ex_flags(new, exid
);
1750 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1751 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1755 nfs4_unlock_state();
1760 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1762 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1765 /* The slot is in use, and no response has been sent. */
1767 if (seqid
== slot_seqid
)
1768 return nfserr_jukebox
;
1770 return nfserr_seq_misordered
;
1772 /* Note unsigned 32-bit arithmetic handles wraparound: */
1773 if (likely(seqid
== slot_seqid
+ 1))
1775 if (seqid
== slot_seqid
)
1776 return nfserr_replay_cache
;
1777 return nfserr_seq_misordered
;
1781 * Cache the create session result into the create session single DRC
1782 * slot cache by saving the xdr structure. sl_seqid has been set.
1783 * Do this for solo or embedded create session operations.
1786 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1787 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1789 slot
->sl_status
= nfserr
;
1790 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1794 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1795 struct nfsd4_clid_slot
*slot
)
1797 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1798 return slot
->sl_status
;
1801 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1802 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1803 1 + /* MIN tag is length with zero, only length */ \
1804 3 + /* version, opcount, opcode */ \
1805 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1806 /* seqid, slotID, slotID, cache */ \
1807 4 ) * sizeof(__be32))
1809 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1810 2 + /* verifier: AUTH_NULL, length 0 */\
1812 1 + /* MIN tag is length with zero, only length */ \
1813 3 + /* opcount, opcode, opstatus*/ \
1814 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1815 /* seqid, slotID, slotID, slotID, status */ \
1816 5 ) * sizeof(__be32))
1818 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs
*ca
, struct nfsd_net
*nn
)
1820 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
1822 if (ca
->maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
)
1823 return nfserr_toosmall
;
1824 if (ca
->maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
)
1825 return nfserr_toosmall
;
1826 ca
->headerpadsz
= 0;
1827 ca
->maxreq_sz
= min_t(u32
, ca
->maxreq_sz
, maxrpc
);
1828 ca
->maxresp_sz
= min_t(u32
, ca
->maxresp_sz
, maxrpc
);
1829 ca
->maxops
= min_t(u32
, ca
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
1830 ca
->maxresp_cached
= min_t(u32
, ca
->maxresp_cached
,
1831 NFSD_SLOT_CACHE_SIZE
+ NFSD_MIN_HDR_SEQ_SZ
);
1832 ca
->maxreqs
= min_t(u32
, ca
->maxreqs
, NFSD_MAX_SLOTS_PER_SESSION
);
1834 * Note decreasing slot size below client's request may make it
1835 * difficult for client to function correctly, whereas
1836 * decreasing the number of slots will (just?) affect
1837 * performance. When short on memory we therefore prefer to
1838 * decrease number of slots instead of their size. Clients that
1839 * request larger slots than they need will get poor results:
1841 ca
->maxreqs
= nfsd4_get_drc_mem(ca
);
1843 return nfserr_jukebox
;
1848 static __be32
check_backchannel_attrs(struct nfsd4_channel_attrs
*ca
)
1850 ca
->headerpadsz
= 0;
1853 * These RPC_MAX_HEADER macros are overkill, especially since we
1854 * don't even do gss on the backchannel yet. But this is still
1855 * less than 1k. Tighten up this estimate in the unlikely event
1856 * it turns out to be a problem for some client:
1858 if (ca
->maxreq_sz
< NFS4_enc_cb_recall_sz
+ RPC_MAX_HEADER_WITH_AUTH
)
1859 return nfserr_toosmall
;
1860 if (ca
->maxresp_sz
< NFS4_dec_cb_recall_sz
+ RPC_MAX_REPHEADER_WITH_AUTH
)
1861 return nfserr_toosmall
;
1862 ca
->maxresp_cached
= 0;
1864 return nfserr_toosmall
;
1869 static __be32
nfsd4_check_cb_sec(struct nfsd4_cb_sec
*cbs
)
1871 switch (cbs
->flavor
) {
1877 * GSS case: the spec doesn't allow us to return this
1878 * error. But it also doesn't allow us not to support
1880 * I'd rather this fail hard than return some error the
1881 * client might think it can already handle:
1883 return nfserr_encr_alg_unsupp
;
1888 nfsd4_create_session(struct svc_rqst
*rqstp
,
1889 struct nfsd4_compound_state
*cstate
,
1890 struct nfsd4_create_session
*cr_ses
)
1892 struct sockaddr
*sa
= svc_addr(rqstp
);
1893 struct nfs4_client
*conf
, *unconf
;
1894 struct nfsd4_session
*new;
1895 struct nfsd4_conn
*conn
;
1896 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1898 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1900 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1901 return nfserr_inval
;
1902 status
= nfsd4_check_cb_sec(&cr_ses
->cb_sec
);
1905 status
= check_forechannel_attrs(&cr_ses
->fore_channel
, nn
);
1908 status
= check_backchannel_attrs(&cr_ses
->back_channel
);
1911 status
= nfserr_jukebox
;
1912 new = alloc_session(&cr_ses
->fore_channel
);
1914 goto out_release_drc_mem
;
1915 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1917 goto out_free_session
;
1920 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1921 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1922 WARN_ON_ONCE(conf
&& unconf
);
1925 status
= nfserr_wrong_cred
;
1926 if (!mach_creds_match(conf
, rqstp
))
1928 cs_slot
= &conf
->cl_cs_slot
;
1929 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1930 if (status
== nfserr_replay_cache
) {
1931 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1933 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1934 status
= nfserr_seq_misordered
;
1937 } else if (unconf
) {
1938 struct nfs4_client
*old
;
1939 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1940 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1941 status
= nfserr_clid_inuse
;
1944 status
= nfserr_wrong_cred
;
1945 if (!mach_creds_match(unconf
, rqstp
))
1947 cs_slot
= &unconf
->cl_cs_slot
;
1948 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1950 /* an unconfirmed replay returns misordered */
1951 status
= nfserr_seq_misordered
;
1954 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1956 status
= mark_client_expired(old
);
1961 move_to_confirmed(unconf
);
1964 status
= nfserr_stale_clientid
;
1969 * We do not support RDMA or persistent sessions
1971 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1972 cr_ses
->flags
&= ~SESSION4_RDMA
;
1974 init_session(rqstp
, new, conf
, cr_ses
);
1975 nfsd4_init_conn(rqstp
, conn
, new);
1977 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1978 NFS4_MAX_SESSIONID_LEN
);
1979 cs_slot
->sl_seqid
++;
1980 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1982 /* cache solo and embedded create sessions under the state lock */
1983 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1984 nfs4_unlock_state();
1987 nfs4_unlock_state();
1990 __free_session(new);
1991 out_release_drc_mem
:
1992 nfsd4_put_drc_mem(&cr_ses
->fore_channel
);
1996 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1999 case NFS4_CDFC4_FORE
:
2000 case NFS4_CDFC4_BACK
:
2002 case NFS4_CDFC4_FORE_OR_BOTH
:
2003 case NFS4_CDFC4_BACK_OR_BOTH
:
2004 *dir
= NFS4_CDFC4_BOTH
;
2007 return nfserr_inval
;
2010 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
2012 struct nfsd4_session
*session
= cstate
->session
;
2013 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2016 status
= nfsd4_check_cb_sec(&bc
->bc_cb_sec
);
2019 spin_lock(&nn
->client_lock
);
2020 session
->se_cb_prog
= bc
->bc_cb_program
;
2021 session
->se_cb_sec
= bc
->bc_cb_sec
;
2022 spin_unlock(&nn
->client_lock
);
2024 nfsd4_probe_callback(session
->se_client
);
2029 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
2030 struct nfsd4_compound_state
*cstate
,
2031 struct nfsd4_bind_conn_to_session
*bcts
)
2034 struct nfsd4_conn
*conn
;
2035 struct nfsd4_session
*session
;
2036 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2038 if (!nfsd4_last_compound_op(rqstp
))
2039 return nfserr_not_only_op
;
2041 spin_lock(&nn
->client_lock
);
2042 session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
2043 spin_unlock(&nn
->client_lock
);
2044 status
= nfserr_badsession
;
2047 status
= nfserr_wrong_cred
;
2048 if (!mach_creds_match(session
->se_client
, rqstp
))
2050 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
2053 conn
= alloc_conn(rqstp
, bcts
->dir
);
2054 status
= nfserr_jukebox
;
2057 nfsd4_init_conn(rqstp
, conn
, session
);
2060 nfs4_unlock_state();
2064 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
2068 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
2072 nfsd4_destroy_session(struct svc_rqst
*r
,
2073 struct nfsd4_compound_state
*cstate
,
2074 struct nfsd4_destroy_session
*sessionid
)
2076 struct nfsd4_session
*ses
;
2078 int ref_held_by_me
= 0;
2079 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
2082 status
= nfserr_not_only_op
;
2083 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
2084 if (!nfsd4_last_compound_op(r
))
2088 dump_sessionid(__func__
, &sessionid
->sessionid
);
2089 spin_lock(&nn
->client_lock
);
2090 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
2091 status
= nfserr_badsession
;
2093 goto out_client_lock
;
2094 status
= nfserr_wrong_cred
;
2095 if (!mach_creds_match(ses
->se_client
, r
))
2096 goto out_client_lock
;
2097 nfsd4_get_session_locked(ses
);
2098 status
= mark_session_dead_locked(ses
, 1 + ref_held_by_me
);
2100 goto out_put_session
;
2101 unhash_session(ses
);
2102 spin_unlock(&nn
->client_lock
);
2104 nfsd4_probe_callback_sync(ses
->se_client
);
2106 spin_lock(&nn
->client_lock
);
2109 nfsd4_put_session(ses
);
2111 spin_unlock(&nn
->client_lock
);
2113 nfs4_unlock_state();
2117 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
2119 struct nfsd4_conn
*c
;
2121 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
2122 if (c
->cn_xprt
== xpt
) {
2129 static __be32
nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
2131 struct nfs4_client
*clp
= ses
->se_client
;
2132 struct nfsd4_conn
*c
;
2133 __be32 status
= nfs_ok
;
2136 spin_lock(&clp
->cl_lock
);
2137 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2140 status
= nfserr_conn_not_bound_to_session
;
2141 if (clp
->cl_mach_cred
)
2143 __nfsd4_hash_conn(new, ses
);
2144 spin_unlock(&clp
->cl_lock
);
2145 ret
= nfsd4_register_conn(new);
2147 /* oops; xprt is already down: */
2148 nfsd4_conn_lost(&new->cn_xpt_user
);
2151 spin_unlock(&clp
->cl_lock
);
2156 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2158 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2160 return args
->opcnt
> session
->se_fchannel
.maxops
;
2163 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2164 struct nfsd4_session
*session
)
2166 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2168 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2172 nfsd4_sequence(struct svc_rqst
*rqstp
,
2173 struct nfsd4_compound_state
*cstate
,
2174 struct nfsd4_sequence
*seq
)
2176 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2177 struct nfsd4_session
*session
;
2178 struct nfs4_client
*clp
;
2179 struct nfsd4_slot
*slot
;
2180 struct nfsd4_conn
*conn
;
2182 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2184 if (resp
->opcnt
!= 1)
2185 return nfserr_sequence_pos
;
2188 * Will be either used or freed by nfsd4_sequence_check_conn
2191 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2193 return nfserr_jukebox
;
2195 spin_lock(&nn
->client_lock
);
2196 status
= nfserr_badsession
;
2197 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2199 goto out_no_session
;
2200 clp
= session
->se_client
;
2201 status
= get_client_locked(clp
);
2203 goto out_no_session
;
2204 status
= nfsd4_get_session_locked(session
);
2206 goto out_put_client
;
2208 status
= nfserr_too_many_ops
;
2209 if (nfsd4_session_too_many_ops(rqstp
, session
))
2210 goto out_put_session
;
2212 status
= nfserr_req_too_big
;
2213 if (nfsd4_request_too_big(rqstp
, session
))
2214 goto out_put_session
;
2216 status
= nfserr_badslot
;
2217 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2218 goto out_put_session
;
2220 slot
= session
->se_slots
[seq
->slotid
];
2221 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2223 /* We do not negotiate the number of slots yet, so set the
2224 * maxslots to the session maxreqs which is used to encode
2225 * sr_highest_slotid and the sr_target_slot id to maxslots */
2226 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2228 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2229 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2230 if (status
== nfserr_replay_cache
) {
2231 status
= nfserr_seq_misordered
;
2232 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2233 goto out_put_session
;
2234 cstate
->slot
= slot
;
2235 cstate
->session
= session
;
2236 /* Return the cached reply status and set cstate->status
2237 * for nfsd4_proc_compound processing */
2238 status
= nfsd4_replay_cache_entry(resp
, seq
);
2239 cstate
->status
= nfserr_replay_cache
;
2243 goto out_put_session
;
2245 status
= nfsd4_sequence_check_conn(conn
, session
);
2248 goto out_put_session
;
2250 /* Success! bump slot seqid */
2251 slot
->sl_seqid
= seq
->seqid
;
2252 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2254 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2256 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2258 cstate
->slot
= slot
;
2259 cstate
->session
= session
;
2262 switch (clp
->cl_cb_state
) {
2264 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2266 case NFSD4_CB_FAULT
:
2267 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2270 seq
->status_flags
= 0;
2272 if (!list_empty(&clp
->cl_revoked
))
2273 seq
->status_flags
|= SEQ4_STATUS_RECALLABLE_STATE_REVOKED
;
2276 spin_unlock(&nn
->client_lock
);
2279 nfsd4_put_session(session
);
2281 put_client_renew_locked(clp
);
2282 goto out_no_session
;
2286 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2288 struct nfs4_client
*conf
, *unconf
, *clp
;
2290 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2293 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2294 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2295 WARN_ON_ONCE(conf
&& unconf
);
2300 if (client_has_state(conf
)) {
2301 status
= nfserr_clientid_busy
;
2307 status
= nfserr_stale_clientid
;
2310 if (!mach_creds_match(clp
, rqstp
)) {
2311 status
= nfserr_wrong_cred
;
2316 nfs4_unlock_state();
2321 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2325 if (rc
->rca_one_fs
) {
2326 if (!cstate
->current_fh
.fh_dentry
)
2327 return nfserr_nofilehandle
;
2329 * We don't take advantage of the rca_one_fs case.
2330 * That's OK, it's optional, we can safely ignore it.
2336 status
= nfserr_complete_already
;
2337 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2338 &cstate
->session
->se_client
->cl_flags
))
2341 status
= nfserr_stale_clientid
;
2342 if (is_client_expired(cstate
->session
->se_client
))
2344 * The following error isn't really legal.
2345 * But we only get here if the client just explicitly
2346 * destroyed the client. Surely it no longer cares what
2347 * error it gets back on an operation for the dead
2353 nfsd4_client_record_create(cstate
->session
->se_client
);
2355 nfs4_unlock_state();
2360 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2361 struct nfsd4_setclientid
*setclid
)
2363 struct xdr_netobj clname
= setclid
->se_name
;
2364 nfs4_verifier clverifier
= setclid
->se_verf
;
2365 struct nfs4_client
*conf
, *unconf
, *new;
2367 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2369 /* Cases below refer to rfc 3530 section 14.2.33: */
2371 conf
= find_confirmed_client_by_name(&clname
, nn
);
2374 status
= nfserr_clid_inuse
;
2375 if (clp_used_exchangeid(conf
))
2377 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2378 char addr_str
[INET6_ADDRSTRLEN
];
2379 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2381 dprintk("NFSD: setclientid: string in use by client "
2382 "at %s\n", addr_str
);
2386 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2388 expire_client(unconf
);
2389 status
= nfserr_jukebox
;
2390 new = create_client(clname
, rqstp
, &clverifier
);
2393 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2394 /* case 1: probable callback update */
2395 copy_clid(new, conf
);
2396 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2398 new->cl_minorversion
= 0;
2399 gen_callback(new, setclid
, rqstp
);
2400 add_to_unconfirmed(new);
2401 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2402 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2403 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2406 nfs4_unlock_state();
2412 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2413 struct nfsd4_compound_state
*cstate
,
2414 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2416 struct nfs4_client
*conf
, *unconf
;
2417 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2418 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2420 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2422 if (STALE_CLIENTID(clid
, nn
))
2423 return nfserr_stale_clientid
;
2426 conf
= find_confirmed_client(clid
, false, nn
);
2427 unconf
= find_unconfirmed_client(clid
, false, nn
);
2429 * We try hard to give out unique clientid's, so if we get an
2430 * attempt to confirm the same clientid with a different cred,
2431 * there's a bug somewhere. Let's charitably assume it's our
2434 status
= nfserr_serverfault
;
2435 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2437 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2439 /* cases below refer to rfc 3530 section 14.2.34: */
2440 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2441 if (conf
&& !unconf
) /* case 2: probable retransmit */
2443 else /* case 4: client hasn't noticed we rebooted yet? */
2444 status
= nfserr_stale_clientid
;
2448 if (conf
) { /* case 1: callback update */
2449 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2450 nfsd4_probe_callback(conf
);
2451 expire_client(unconf
);
2452 } else { /* case 3: normal case; new or rebooted client */
2453 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2455 status
= mark_client_expired(conf
);
2458 expire_client(conf
);
2460 move_to_confirmed(unconf
);
2461 nfsd4_probe_callback(unconf
);
2464 nfs4_unlock_state();
2468 static struct nfs4_file
*nfsd4_alloc_file(void)
2470 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2473 /* OPEN Share state helper functions */
2474 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2476 unsigned int hashval
= file_hashval(ino
);
2478 atomic_set(&fp
->fi_ref
, 1);
2479 INIT_LIST_HEAD(&fp
->fi_stateids
);
2480 INIT_LIST_HEAD(&fp
->fi_delegations
);
2481 fp
->fi_inode
= igrab(ino
);
2482 fp
->fi_had_conflict
= false;
2483 fp
->fi_lease
= NULL
;
2484 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2485 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2486 spin_lock(&recall_lock
);
2487 hlist_add_head(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2488 spin_unlock(&recall_lock
);
2492 nfsd4_free_slab(struct kmem_cache
**slab
)
2496 kmem_cache_destroy(*slab
);
2501 nfsd4_free_slabs(void)
2503 nfsd4_free_slab(&openowner_slab
);
2504 nfsd4_free_slab(&lockowner_slab
);
2505 nfsd4_free_slab(&file_slab
);
2506 nfsd4_free_slab(&stateid_slab
);
2507 nfsd4_free_slab(&deleg_slab
);
2511 nfsd4_init_slabs(void)
2513 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2514 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2515 if (openowner_slab
== NULL
)
2517 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2518 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2519 if (lockowner_slab
== NULL
)
2521 file_slab
= kmem_cache_create("nfsd4_files",
2522 sizeof(struct nfs4_file
), 0, 0, NULL
);
2523 if (file_slab
== NULL
)
2525 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2526 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2527 if (stateid_slab
== NULL
)
2529 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2530 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2531 if (deleg_slab
== NULL
)
2536 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2540 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2542 kfree(oo
->oo_owner
.so_owner
.data
);
2543 kmem_cache_free(openowner_slab
, oo
);
2546 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2548 kfree(lo
->lo_owner
.so_owner
.data
);
2549 kmem_cache_free(lockowner_slab
, lo
);
2552 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2554 rp
->rp_status
= nfserr_serverfault
;
2556 rp
->rp_buf
= rp
->rp_ibuf
;
2559 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2561 struct nfs4_stateowner
*sop
;
2563 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2567 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2568 if (!sop
->so_owner
.data
) {
2569 kmem_cache_free(slab
, sop
);
2572 sop
->so_owner
.len
= owner
->len
;
2574 INIT_LIST_HEAD(&sop
->so_stateids
);
2575 sop
->so_client
= clp
;
2576 init_nfs4_replay(&sop
->so_replay
);
2580 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2582 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2584 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2585 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2588 static struct nfs4_openowner
*
2589 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2590 struct nfs4_openowner
*oo
;
2592 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2595 oo
->oo_owner
.so_is_open_owner
= 1;
2596 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2597 oo
->oo_flags
= NFS4_OO_NEW
;
2599 oo
->oo_last_closed_stid
= NULL
;
2600 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2601 hash_openowner(oo
, clp
, strhashval
);
2605 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2606 struct nfs4_openowner
*oo
= open
->op_openowner
;
2608 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2609 INIT_LIST_HEAD(&stp
->st_lockowners
);
2610 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2611 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2612 stp
->st_stateowner
= &oo
->oo_owner
;
2615 stp
->st_access_bmap
= 0;
2616 stp
->st_deny_bmap
= 0;
2617 set_access(open
->op_share_access
, stp
);
2618 set_deny(open
->op_share_deny
, stp
);
2619 stp
->st_openstp
= NULL
;
2623 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2625 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2627 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2629 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2630 oo
->oo_time
= get_seconds();
2634 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2637 return (sop
->so_owner
.len
== owner
->len
) &&
2638 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2639 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2642 static struct nfs4_openowner
*
2643 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2644 bool sessions
, struct nfsd_net
*nn
)
2646 struct nfs4_stateowner
*so
;
2647 struct nfs4_openowner
*oo
;
2648 struct nfs4_client
*clp
;
2650 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2651 if (!so
->so_is_open_owner
)
2653 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2655 clp
= oo
->oo_owner
.so_client
;
2656 if ((bool)clp
->cl_minorversion
!= sessions
)
2658 renew_client(oo
->oo_owner
.so_client
);
2665 /* search file_hashtbl[] for file */
2666 static struct nfs4_file
*
2667 find_file(struct inode
*ino
)
2669 unsigned int hashval
= file_hashval(ino
);
2670 struct nfs4_file
*fp
;
2672 spin_lock(&recall_lock
);
2673 hlist_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2674 if (fp
->fi_inode
== ino
) {
2676 spin_unlock(&recall_lock
);
2680 spin_unlock(&recall_lock
);
2685 * Called to check deny when READ with all zero stateid or
2686 * WRITE with all zero or all one stateid
2689 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2691 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2692 struct nfs4_file
*fp
;
2693 struct nfs4_ol_stateid
*stp
;
2696 fp
= find_file(ino
);
2699 ret
= nfserr_locked
;
2700 /* Search for conflicting share reservations */
2701 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2702 if (test_deny(deny_type
, stp
) ||
2703 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2712 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2714 struct nfs4_client
*clp
= dp
->dl_stid
.sc_client
;
2715 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2717 /* We're assuming the state code never drops its reference
2718 * without first removing the lease. Since we're in this lease
2719 * callback (and since the lease code is serialized by the kernel
2720 * lock) we know the server hasn't removed the lease yet, we know
2721 * it's safe to take a reference: */
2722 atomic_inc(&dp
->dl_count
);
2724 list_add_tail(&dp
->dl_recall_lru
, &nn
->del_recall_lru
);
2726 /* Only place dl_time is set; protected by i_lock: */
2727 dp
->dl_time
= get_seconds();
2729 nfsd4_cb_recall(dp
);
2732 /* Called from break_lease() with i_lock held. */
2733 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2735 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2736 struct nfs4_delegation
*dp
;
2739 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2742 if (fp
->fi_had_conflict
) {
2743 WARN(1, "duplicate break on %p\n", fp
);
2747 * We don't want the locks code to timeout the lease for us;
2748 * we'll remove it ourself if a delegation isn't returned
2751 fl
->fl_break_time
= 0;
2753 spin_lock(&recall_lock
);
2754 fp
->fi_had_conflict
= true;
2755 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2756 nfsd_break_one_deleg(dp
);
2757 spin_unlock(&recall_lock
);
2761 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2764 return lease_modify(onlist
, arg
);
2769 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2770 .lm_break
= nfsd_break_deleg_cb
,
2771 .lm_change
= nfsd_change_deleg_cb
,
2774 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2776 if (nfsd4_has_session(cstate
))
2778 if (seqid
== so
->so_seqid
- 1)
2779 return nfserr_replay_me
;
2780 if (seqid
== so
->so_seqid
)
2782 return nfserr_bad_seqid
;
2786 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2787 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2789 clientid_t
*clientid
= &open
->op_clientid
;
2790 struct nfs4_client
*clp
= NULL
;
2791 unsigned int strhashval
;
2792 struct nfs4_openowner
*oo
= NULL
;
2795 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2796 return nfserr_stale_clientid
;
2798 * In case we need it later, after we've already created the
2799 * file and don't want to risk a further failure:
2801 open
->op_file
= nfsd4_alloc_file();
2802 if (open
->op_file
== NULL
)
2803 return nfserr_jukebox
;
2805 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2806 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2807 open
->op_openowner
= oo
;
2809 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2812 return nfserr_expired
;
2815 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2816 /* Replace unconfirmed owners without checking for replay. */
2817 clp
= oo
->oo_owner
.so_client
;
2818 release_openowner(oo
);
2819 open
->op_openowner
= NULL
;
2822 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2825 clp
= oo
->oo_owner
.so_client
;
2828 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2830 return nfserr_jukebox
;
2831 open
->op_openowner
= oo
;
2833 open
->op_stp
= nfs4_alloc_stateid(clp
);
2835 return nfserr_jukebox
;
2839 static inline __be32
2840 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2842 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2843 return nfserr_openmode
;
2848 static int share_access_to_flags(u32 share_access
)
2850 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2853 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2855 struct nfs4_stid
*ret
;
2857 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2860 return delegstateid(ret
);
2863 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2865 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2866 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2870 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfsd4_open
*open
,
2871 struct nfs4_delegation
**dp
)
2874 __be32 status
= nfserr_bad_stateid
;
2876 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2879 flags
= share_access_to_flags(open
->op_share_access
);
2880 status
= nfs4_check_delegmode(*dp
, flags
);
2884 if (!nfsd4_is_deleg_cur(open
))
2888 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2893 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2895 struct nfs4_ol_stateid
*local
;
2896 struct nfs4_openowner
*oo
= open
->op_openowner
;
2898 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2899 /* ignore lock owners */
2900 if (local
->st_stateowner
->so_is_open_owner
== 0)
2902 /* remember if we have seen this open owner */
2903 if (local
->st_stateowner
== &oo
->oo_owner
)
2905 /* check for conflicting share reservations */
2906 if (!test_share(local
, open
))
2907 return nfserr_share_denied
;
2912 static inline int nfs4_access_to_access(u32 nfs4_access
)
2916 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2917 flags
|= NFSD_MAY_READ
;
2918 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2919 flags
|= NFSD_MAY_WRITE
;
2923 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2924 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2927 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2928 int access
= nfs4_access_to_access(open
->op_share_access
);
2930 if (!fp
->fi_fds
[oflag
]) {
2931 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2932 &fp
->fi_fds
[oflag
]);
2936 nfs4_file_get_access(fp
, oflag
);
2941 static inline __be32
2942 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2943 struct nfsd4_open
*open
)
2945 struct iattr iattr
= {
2946 .ia_valid
= ATTR_SIZE
,
2949 if (!open
->op_truncate
)
2951 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2952 return nfserr_inval
;
2953 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2957 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
)
2959 u32 op_share_access
= open
->op_share_access
;
2963 new_access
= !test_access(op_share_access
, stp
);
2965 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2969 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2972 int oflag
= nfs4_access_to_omode(op_share_access
);
2973 nfs4_file_put_access(fp
, oflag
);
2977 /* remember the open */
2978 set_access(op_share_access
, stp
);
2979 set_deny(open
->op_share_deny
, stp
);
2986 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2988 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2991 /* Should we give out recallable state?: */
2992 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2994 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2997 * In the sessions case, since we don't have to establish a
2998 * separate connection for callbacks, we assume it's OK
2999 * until we hear otherwise:
3001 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
3004 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
3006 struct file_lock
*fl
;
3008 fl
= locks_alloc_lock();
3011 locks_init_lock(fl
);
3012 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
3013 fl
->fl_flags
= FL_LEASE
;
3014 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
3015 fl
->fl_end
= OFFSET_MAX
;
3016 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
3017 fl
->fl_pid
= current
->tgid
;
3021 static int nfs4_setlease(struct nfs4_delegation
*dp
)
3023 struct nfs4_file
*fp
= dp
->dl_file
;
3024 struct file_lock
*fl
;
3027 fl
= nfs4_alloc_init_lease(dp
, NFS4_OPEN_DELEGATE_READ
);
3030 fl
->fl_file
= find_readable_file(fp
);
3031 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3032 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
3034 list_del_init(&dp
->dl_perclnt
);
3035 locks_free_lock(fl
);
3039 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
3040 atomic_set(&fp
->fi_delegees
, 1);
3041 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3045 static int nfs4_set_delegation(struct nfs4_delegation
*dp
)
3047 struct nfs4_file
*fp
= dp
->dl_file
;
3050 return nfs4_setlease(dp
);
3051 spin_lock(&recall_lock
);
3052 if (fp
->fi_had_conflict
) {
3053 spin_unlock(&recall_lock
);
3056 atomic_inc(&fp
->fi_delegees
);
3057 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
3058 spin_unlock(&recall_lock
);
3059 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
3063 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
3065 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3066 if (status
== -EAGAIN
)
3067 open
->op_why_no_deleg
= WND4_CONTENTION
;
3069 open
->op_why_no_deleg
= WND4_RESOURCE
;
3070 switch (open
->op_deleg_want
) {
3071 case NFS4_SHARE_WANT_READ_DELEG
:
3072 case NFS4_SHARE_WANT_WRITE_DELEG
:
3073 case NFS4_SHARE_WANT_ANY_DELEG
:
3075 case NFS4_SHARE_WANT_CANCEL
:
3076 open
->op_why_no_deleg
= WND4_CANCELLED
;
3078 case NFS4_SHARE_WANT_NO_DELEG
:
3085 * Attempt to hand out a delegation.
3087 * Note we don't support write delegations, and won't until the vfs has
3088 * proper support for them.
3091 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
3092 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
3094 struct nfs4_delegation
*dp
;
3095 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
3099 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
3100 open
->op_recall
= 0;
3101 switch (open
->op_claim_type
) {
3102 case NFS4_OPEN_CLAIM_PREVIOUS
:
3104 open
->op_recall
= 1;
3105 if (open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_READ
)
3108 case NFS4_OPEN_CLAIM_NULL
:
3110 * Let's not give out any delegations till everyone's
3111 * had the chance to reclaim theirs....
3113 if (locks_in_grace(net
))
3115 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3118 * Also, if the file was opened for write or
3119 * create, there's a good chance the client's
3120 * about to write to it, resulting in an
3121 * immediate recall (since we don't support
3122 * write delegations):
3124 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
3126 if (open
->op_create
== NFS4_OPEN_CREATE
)
3132 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
);
3135 status
= nfs4_set_delegation(dp
);
3139 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
3141 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
3142 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
3143 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_READ
;
3146 unhash_stid(&dp
->dl_stid
);
3147 nfs4_put_delegation(dp
);
3149 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE
;
3150 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
3151 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
) {
3152 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3153 open
->op_recall
= 1;
3156 /* 4.1 client asking for a delegation? */
3157 if (open
->op_deleg_want
)
3158 nfsd4_open_deleg_none_ext(open
, status
);
3162 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
3163 struct nfs4_delegation
*dp
)
3165 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3166 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3167 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3168 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3169 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3170 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3171 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3172 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3174 /* Otherwise the client must be confused wanting a delegation
3175 * it already has, therefore we don't return
3176 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3181 * called with nfs4_lock_state() held.
3184 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3186 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3187 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3188 struct nfs4_file
*fp
= NULL
;
3189 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3190 struct nfs4_ol_stateid
*stp
= NULL
;
3191 struct nfs4_delegation
*dp
= NULL
;
3195 * Lookup file; if found, lookup stateid and check open request,
3196 * and check for delegations in the process of being recalled.
3197 * If not found, create the nfs4_file struct
3199 fp
= find_file(ino
);
3201 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3203 status
= nfs4_check_deleg(cl
, open
, &dp
);
3207 status
= nfserr_bad_stateid
;
3208 if (nfsd4_is_deleg_cur(open
))
3210 status
= nfserr_jukebox
;
3212 open
->op_file
= NULL
;
3213 nfsd4_init_file(fp
, ino
);
3217 * OPEN the file, or upgrade an existing OPEN.
3218 * If truncate fails, the OPEN fails.
3221 /* Stateid was found, this is an OPEN upgrade */
3222 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3226 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3229 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3233 open
->op_stp
= NULL
;
3234 init_open_stateid(stp
, fp
, open
);
3236 update_stateid(&stp
->st_stid
.sc_stateid
);
3237 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3239 if (nfsd4_has_session(&resp
->cstate
)) {
3240 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3242 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3243 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3244 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3250 * Attempt to hand out a delegation. No error return, because the
3251 * OPEN succeeds even if we fail.
3253 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3257 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3258 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3260 /* 4.1 client trying to upgrade/downgrade delegation? */
3261 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3262 open
->op_deleg_want
)
3263 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3267 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3268 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3270 * To finish the open response, we just need to set the rflags.
3272 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3273 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3274 !nfsd4_has_session(&resp
->cstate
))
3275 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3280 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3282 if (open
->op_openowner
) {
3283 struct nfs4_openowner
*oo
= open
->op_openowner
;
3285 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3286 list_del_init(&oo
->oo_close_lru
);
3287 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3289 release_openowner(oo
);
3290 open
->op_openowner
= NULL
;
3292 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3296 nfsd4_free_file(open
->op_file
);
3298 free_generic_stateid(open
->op_stp
);
3301 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3303 struct nfs4_client
*found
;
3305 if (STALE_CLIENTID(clid
, nn
))
3306 return nfserr_stale_clientid
;
3307 found
= find_confirmed_client(clid
, session
, nn
);
3310 return found
? nfs_ok
: nfserr_expired
;
3314 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3317 struct nfs4_client
*clp
;
3319 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3322 dprintk("process_renew(%08x/%08x): starting\n",
3323 clid
->cl_boot
, clid
->cl_id
);
3324 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3327 status
= nfserr_cb_path_down
;
3328 if (!list_empty(&clp
->cl_delegations
)
3329 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3333 nfs4_unlock_state();
3338 nfsd4_end_grace(struct nfsd_net
*nn
)
3340 /* do nothing if grace period already ended */
3341 if (nn
->grace_ended
)
3344 dprintk("NFSD: end of grace period\n");
3345 nn
->grace_ended
= true;
3346 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3347 locks_end_grace(&nn
->nfsd4_manager
);
3349 * Now that every NFSv4 client has had the chance to recover and
3350 * to see the (possibly new, possibly shorter) lease time, we
3351 * can safely set the next grace time to the current lease time:
3353 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3357 nfs4_laundromat(struct nfsd_net
*nn
)
3359 struct nfs4_client
*clp
;
3360 struct nfs4_openowner
*oo
;
3361 struct nfs4_delegation
*dp
;
3362 struct list_head
*pos
, *next
, reaplist
;
3363 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3364 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3365 time_t u
, test_val
= nn
->nfsd4_lease
;
3369 dprintk("NFSD: laundromat service - starting\n");
3370 nfsd4_end_grace(nn
);
3371 INIT_LIST_HEAD(&reaplist
);
3372 spin_lock(&nn
->client_lock
);
3373 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3374 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3375 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3376 t
= clp
->cl_time
- cutoff
;
3377 if (clientid_val
> t
)
3381 if (mark_client_expired_locked(clp
)) {
3382 dprintk("NFSD: client in use (clientid %08x)\n",
3383 clp
->cl_clientid
.cl_id
);
3386 list_move(&clp
->cl_lru
, &reaplist
);
3388 spin_unlock(&nn
->client_lock
);
3389 list_for_each_safe(pos
, next
, &reaplist
) {
3390 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3391 dprintk("NFSD: purging unused client (clientid %08x)\n",
3392 clp
->cl_clientid
.cl_id
);
3395 spin_lock(&recall_lock
);
3396 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
3397 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3398 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3400 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3401 u
= dp
->dl_time
- cutoff
;
3406 list_move(&dp
->dl_recall_lru
, &reaplist
);
3408 spin_unlock(&recall_lock
);
3409 list_for_each_safe(pos
, next
, &reaplist
) {
3410 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3411 revoke_delegation(dp
);
3413 test_val
= nn
->nfsd4_lease
;
3414 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3415 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3416 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3417 u
= oo
->oo_time
- cutoff
;
3422 release_openowner(oo
);
3424 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3425 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3426 nfs4_unlock_state();
3427 return clientid_val
;
3430 static struct workqueue_struct
*laundry_wq
;
3431 static void laundromat_main(struct work_struct
*);
3434 laundromat_main(struct work_struct
*laundry
)
3437 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3439 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3442 t
= nfs4_laundromat(nn
);
3443 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3444 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3447 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3449 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3450 return nfserr_bad_stateid
;
3455 access_permit_read(struct nfs4_ol_stateid
*stp
)
3457 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3458 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3459 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3463 access_permit_write(struct nfs4_ol_stateid
*stp
)
3465 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3466 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3470 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3472 __be32 status
= nfserr_openmode
;
3474 /* For lock stateid's, we test the parent open, not the lock: */
3475 if (stp
->st_openstp
)
3476 stp
= stp
->st_openstp
;
3477 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3479 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3486 static inline __be32
3487 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3489 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3491 else if (locks_in_grace(net
)) {
3492 /* Answer in remaining cases depends on existence of
3493 * conflicting state; so we must wait out the grace period. */
3494 return nfserr_grace
;
3495 } else if (flags
& WR_STATE
)
3496 return nfs4_share_conflict(current_fh
,
3497 NFS4_SHARE_DENY_WRITE
);
3498 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3499 return nfs4_share_conflict(current_fh
,
3500 NFS4_SHARE_DENY_READ
);
3504 * Allow READ/WRITE during grace period on recovered state only for files
3505 * that are not able to provide mandatory locking.
3508 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3510 return locks_in_grace(net
) && mandatory_lock(inode
);
3513 /* Returns true iff a is later than b: */
3514 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3516 return (s32
)(a
->si_generation
- b
->si_generation
) > 0;
3519 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3522 * When sessions are used the stateid generation number is ignored
3525 if (has_session
&& in
->si_generation
== 0)
3528 if (in
->si_generation
== ref
->si_generation
)
3531 /* If the client sends us a stateid from the future, it's buggy: */
3532 if (stateid_generation_after(in
, ref
))
3533 return nfserr_bad_stateid
;
3535 * However, we could see a stateid from the past, even from a
3536 * non-buggy client. For example, if the client sends a lock
3537 * while some IO is outstanding, the lock may bump si_generation
3538 * while the IO is still in flight. The client could avoid that
3539 * situation by waiting for responses on all the IO requests,
3540 * but better performance may result in retrying IO that
3541 * receives an old_stateid error if requests are rarely
3542 * reordered in flight:
3544 return nfserr_old_stateid
;
3547 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3549 struct nfs4_stid
*s
;
3550 struct nfs4_ol_stateid
*ols
;
3553 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3554 return nfserr_bad_stateid
;
3555 /* Client debugging aid. */
3556 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3557 char addr_str
[INET6_ADDRSTRLEN
];
3558 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3560 pr_warn_ratelimited("NFSD: client %s testing state ID "
3561 "with incorrect client ID\n", addr_str
);
3562 return nfserr_bad_stateid
;
3564 s
= find_stateid(cl
, stateid
);
3566 return nfserr_bad_stateid
;
3567 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3570 switch (s
->sc_type
) {
3571 case NFS4_DELEG_STID
:
3573 case NFS4_REVOKED_DELEG_STID
:
3574 return nfserr_deleg_revoked
;
3575 case NFS4_OPEN_STID
:
3576 case NFS4_LOCK_STID
:
3577 ols
= openlockstateid(s
);
3578 if (ols
->st_stateowner
->so_is_open_owner
3579 && !(openowner(ols
->st_stateowner
)->oo_flags
3580 & NFS4_OO_CONFIRMED
))
3581 return nfserr_bad_stateid
;
3584 printk("unknown stateid type %x\n", s
->sc_type
);
3585 case NFS4_CLOSED_STID
:
3586 return nfserr_bad_stateid
;
3590 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3591 struct nfs4_stid
**s
, bool sessions
,
3592 struct nfsd_net
*nn
)
3594 struct nfs4_client
*cl
;
3597 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3598 return nfserr_bad_stateid
;
3599 status
= lookup_clientid(&stateid
->si_opaque
.so_clid
, sessions
,
3601 if (status
== nfserr_stale_clientid
)
3602 return nfserr_stale_stateid
;
3605 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3607 return nfserr_bad_stateid
;
3612 * Checks for stateid operations
3615 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3616 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3618 struct nfs4_stid
*s
;
3619 struct nfs4_ol_stateid
*stp
= NULL
;
3620 struct nfs4_delegation
*dp
= NULL
;
3621 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3622 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3623 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3629 if (grace_disallows_io(net
, ino
))
3630 return nfserr_grace
;
3632 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3633 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3635 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3636 &s
, cstate
->minorversion
, nn
);
3639 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3642 switch (s
->sc_type
) {
3643 case NFS4_DELEG_STID
:
3644 dp
= delegstateid(s
);
3645 status
= nfs4_check_delegmode(dp
, flags
);
3649 *filpp
= dp
->dl_file
->fi_deleg_file
;
3652 status
= nfserr_serverfault
;
3657 case NFS4_OPEN_STID
:
3658 case NFS4_LOCK_STID
:
3659 stp
= openlockstateid(s
);
3660 status
= nfs4_check_fh(current_fh
, stp
);
3663 if (stp
->st_stateowner
->so_is_open_owner
3664 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3666 status
= nfs4_check_openmode(stp
, flags
);
3670 if (flags
& RD_STATE
)
3671 *filpp
= find_readable_file(stp
->st_file
);
3673 *filpp
= find_writeable_file(stp
->st_file
);
3677 return nfserr_bad_stateid
;
3685 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3687 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3688 return nfserr_locks_held
;
3689 release_lock_stateid(stp
);
3694 * Test if the stateid is valid
3697 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3698 struct nfsd4_test_stateid
*test_stateid
)
3700 struct nfsd4_test_stateid_id
*stateid
;
3701 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3704 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3705 stateid
->ts_id_status
=
3706 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3707 nfs4_unlock_state();
3713 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3714 struct nfsd4_free_stateid
*free_stateid
)
3716 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3717 struct nfs4_stid
*s
;
3718 struct nfs4_delegation
*dp
;
3719 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3720 __be32 ret
= nfserr_bad_stateid
;
3723 s
= find_stateid(cl
, stateid
);
3726 switch (s
->sc_type
) {
3727 case NFS4_DELEG_STID
:
3728 ret
= nfserr_locks_held
;
3730 case NFS4_OPEN_STID
:
3731 case NFS4_LOCK_STID
:
3732 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3735 if (s
->sc_type
== NFS4_LOCK_STID
)
3736 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3738 ret
= nfserr_locks_held
;
3740 case NFS4_REVOKED_DELEG_STID
:
3741 dp
= delegstateid(s
);
3742 destroy_revoked_delegation(dp
);
3746 ret
= nfserr_bad_stateid
;
3749 nfs4_unlock_state();
3756 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3757 RD_STATE
: WR_STATE
;
3760 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3762 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3763 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3766 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3769 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
3770 || stp
->st_stid
.sc_type
== NFS4_REVOKED_DELEG_STID
)
3772 * "Closed" stateid's exist *only* to return
3773 * nfserr_replay_me from the previous step, and
3774 * revoked delegations are kept only for free_stateid.
3776 return nfserr_bad_stateid
;
3777 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3780 return nfs4_check_fh(current_fh
, stp
);
3784 * Checks for sequence id mutating operations.
3787 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3788 stateid_t
*stateid
, char typemask
,
3789 struct nfs4_ol_stateid
**stpp
,
3790 struct nfsd_net
*nn
)
3793 struct nfs4_stid
*s
;
3795 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3796 seqid
, STATEID_VAL(stateid
));
3799 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3800 cstate
->minorversion
, nn
);
3803 *stpp
= openlockstateid(s
);
3804 if (!nfsd4_has_session(cstate
))
3805 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3807 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3810 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3811 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3814 struct nfs4_openowner
*oo
;
3816 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3817 NFS4_OPEN_STID
, stpp
, nn
);
3820 oo
= openowner((*stpp
)->st_stateowner
);
3821 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3822 return nfserr_bad_stateid
;
3827 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3828 struct nfsd4_open_confirm
*oc
)
3831 struct nfs4_openowner
*oo
;
3832 struct nfs4_ol_stateid
*stp
;
3833 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3835 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3836 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3837 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3839 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3845 status
= nfs4_preprocess_seqid_op(cstate
,
3846 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3847 NFS4_OPEN_STID
, &stp
, nn
);
3850 oo
= openowner(stp
->st_stateowner
);
3851 status
= nfserr_bad_stateid
;
3852 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3854 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3855 update_stateid(&stp
->st_stid
.sc_stateid
);
3856 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3857 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3858 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3860 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3863 nfsd4_bump_seqid(cstate
, status
);
3864 if (!cstate
->replay_owner
)
3865 nfs4_unlock_state();
3869 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3871 if (!test_access(access
, stp
))
3873 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3874 clear_access(access
, stp
);
3877 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3879 switch (to_access
) {
3880 case NFS4_SHARE_ACCESS_READ
:
3881 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3882 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3884 case NFS4_SHARE_ACCESS_WRITE
:
3885 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3886 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3888 case NFS4_SHARE_ACCESS_BOTH
:
3896 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3899 for (i
= 0; i
< 4; i
++) {
3900 if ((i
& deny
) != i
)
3906 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3907 struct nfsd4_compound_state
*cstate
,
3908 struct nfsd4_open_downgrade
*od
)
3911 struct nfs4_ol_stateid
*stp
;
3912 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3914 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3915 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3916 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3918 /* We don't yet support WANT bits: */
3919 if (od
->od_deleg_want
)
3920 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3924 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3925 &od
->od_stateid
, &stp
, nn
);
3928 status
= nfserr_inval
;
3929 if (!test_access(od
->od_share_access
, stp
)) {
3930 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3931 stp
->st_access_bmap
, od
->od_share_access
);
3934 if (!test_deny(od
->od_share_deny
, stp
)) {
3935 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3936 stp
->st_deny_bmap
, od
->od_share_deny
);
3939 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3941 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3943 update_stateid(&stp
->st_stid
.sc_stateid
);
3944 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3947 nfsd4_bump_seqid(cstate
, status
);
3948 if (!cstate
->replay_owner
)
3949 nfs4_unlock_state();
3953 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3955 unhash_open_stateid(s
);
3956 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3960 * nfs4_unlock_state() called after encode
3963 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3964 struct nfsd4_close
*close
)
3967 struct nfs4_openowner
*oo
;
3968 struct nfs4_ol_stateid
*stp
;
3969 struct net
*net
= SVC_NET(rqstp
);
3970 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3972 dprintk("NFSD: nfsd4_close on file %.*s\n",
3973 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3974 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3977 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3979 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3981 nfsd4_bump_seqid(cstate
, status
);
3984 oo
= openowner(stp
->st_stateowner
);
3985 update_stateid(&stp
->st_stid
.sc_stateid
);
3986 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3988 nfsd4_close_open_stateid(stp
);
3990 if (cstate
->minorversion
) {
3991 unhash_stid(&stp
->st_stid
);
3992 free_generic_stateid(stp
);
3994 oo
->oo_last_closed_stid
= stp
;
3996 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3997 if (cstate
->minorversion
)
3998 release_openowner(oo
);
4001 * In the 4.0 case we need to keep the owners around a
4002 * little while to handle CLOSE replay.
4004 move_to_close_lru(oo
, SVC_NET(rqstp
));
4008 if (!cstate
->replay_owner
)
4009 nfs4_unlock_state();
4014 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4015 struct nfsd4_delegreturn
*dr
)
4017 struct nfs4_delegation
*dp
;
4018 stateid_t
*stateid
= &dr
->dr_stateid
;
4019 struct nfs4_stid
*s
;
4021 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4023 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4027 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
4028 cstate
->minorversion
, nn
);
4031 dp
= delegstateid(s
);
4032 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
4036 destroy_delegation(dp
);
4038 nfs4_unlock_state();
4044 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4046 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
4049 end_offset(u64 start
, u64 len
)
4054 return end
>= start
? end
: NFS4_MAX_UINT64
;
4057 /* last octet in a range */
4059 last_byte_offset(u64 start
, u64 len
)
4065 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
4068 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
4070 return (file_hashval(inode
) + cl_id
4071 + opaque_hashval(ownername
->data
, ownername
->len
))
4072 & LOCKOWNER_INO_HASH_MASK
;
4076 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4077 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4078 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4079 * locking, this prevents us from being completely protocol-compliant. The
4080 * real solution to this problem is to start using unsigned file offsets in
4081 * the VFS, but this is a very deep change!
4084 nfs4_transform_lock_offset(struct file_lock
*lock
)
4086 if (lock
->fl_start
< 0)
4087 lock
->fl_start
= OFFSET_MAX
;
4088 if (lock
->fl_end
< 0)
4089 lock
->fl_end
= OFFSET_MAX
;
4092 /* Hack!: For now, we're defining this just so we can use a pointer to it
4093 * as a unique cookie to identify our (NFSv4's) posix locks. */
4094 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
4098 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
4100 struct nfs4_lockowner
*lo
;
4102 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
4103 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
4104 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
4105 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
4106 if (!deny
->ld_owner
.data
)
4107 /* We just don't care that much */
4109 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
4110 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
4113 deny
->ld_owner
.len
= 0;
4114 deny
->ld_owner
.data
= NULL
;
4115 deny
->ld_clientid
.cl_boot
= 0;
4116 deny
->ld_clientid
.cl_id
= 0;
4118 deny
->ld_start
= fl
->fl_start
;
4119 deny
->ld_length
= NFS4_MAX_UINT64
;
4120 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
4121 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
4122 deny
->ld_type
= NFS4_READ_LT
;
4123 if (fl
->fl_type
!= F_RDLCK
)
4124 deny
->ld_type
= NFS4_WRITE_LT
;
4127 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
4129 struct nfs4_ol_stateid
*lst
;
4131 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
4133 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4134 struct nfs4_ol_stateid
, st_perstateowner
);
4135 return lst
->st_file
->fi_inode
== inode
;
4138 static struct nfs4_lockowner
*
4139 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
4140 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
4142 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
4143 struct nfs4_lockowner
*lo
;
4145 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
4146 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
4152 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
4154 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
4155 unsigned int inohash
= lockowner_ino_hashval(inode
,
4156 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
4157 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
4159 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4160 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4161 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4165 * Alloc a lock owner structure.
4166 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4169 * strhashval = ownerstr_hashval
4172 static struct nfs4_lockowner
*
4173 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4174 struct nfs4_lockowner
*lo
;
4176 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4179 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4180 lo
->lo_owner
.so_is_open_owner
= 0;
4181 /* It is the openowner seqid that will be incremented in encode in the
4182 * case of new lockowners; so increment the lock seqid manually: */
4183 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4184 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4188 static struct nfs4_ol_stateid
*
4189 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4191 struct nfs4_ol_stateid
*stp
;
4192 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4194 stp
= nfs4_alloc_stateid(clp
);
4197 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4198 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4199 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4200 stp
->st_stateowner
= &lo
->lo_owner
;
4203 stp
->st_access_bmap
= 0;
4204 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4205 stp
->st_openstp
= open_stp
;
4210 check_lock_length(u64 offset
, u64 length
)
4212 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4213 LOFF_OVERFLOW(offset
, length
)));
4216 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4218 struct nfs4_file
*fp
= lock_stp
->st_file
;
4219 int oflag
= nfs4_access_to_omode(access
);
4221 if (test_access(access
, lock_stp
))
4223 nfs4_file_get_access(fp
, oflag
);
4224 set_access(access
, lock_stp
);
4227 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)
4229 struct nfs4_file
*fi
= ost
->st_file
;
4230 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4231 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4232 struct nfs4_lockowner
*lo
;
4233 unsigned int strhashval
;
4234 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4236 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4237 &lock
->v
.new.owner
, nn
);
4239 if (!cstate
->minorversion
)
4240 return nfserr_bad_seqid
;
4241 /* XXX: a lockowner always has exactly one stateid: */
4242 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4243 struct nfs4_ol_stateid
, st_perstateowner
);
4246 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4247 &lock
->v
.new.owner
);
4248 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4250 return nfserr_jukebox
;
4251 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4253 release_lockowner(lo
);
4254 return nfserr_jukebox
;
4264 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4265 struct nfsd4_lock
*lock
)
4267 struct nfs4_openowner
*open_sop
= NULL
;
4268 struct nfs4_lockowner
*lock_sop
= NULL
;
4269 struct nfs4_ol_stateid
*lock_stp
;
4270 struct file
*filp
= NULL
;
4271 struct file_lock
*file_lock
= NULL
;
4272 struct file_lock
*conflock
= NULL
;
4274 bool new_state
= false;
4277 struct net
*net
= SVC_NET(rqstp
);
4278 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4280 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4281 (long long) lock
->lk_offset
,
4282 (long long) lock
->lk_length
);
4284 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4285 return nfserr_inval
;
4287 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4288 S_IFREG
, NFSD_MAY_LOCK
))) {
4289 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4295 if (lock
->lk_is_new
) {
4296 struct nfs4_ol_stateid
*open_stp
= NULL
;
4298 if (nfsd4_has_session(cstate
))
4299 /* See rfc 5661 18.10.3: given clientid is ignored: */
4300 memcpy(&lock
->v
.new.clientid
,
4301 &cstate
->session
->se_client
->cl_clientid
,
4302 sizeof(clientid_t
));
4304 status
= nfserr_stale_clientid
;
4305 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4308 /* validate and update open stateid and open seqid */
4309 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4310 lock
->lk_new_open_seqid
,
4311 &lock
->lk_new_open_stateid
,
4315 open_sop
= openowner(open_stp
->st_stateowner
);
4316 status
= nfserr_bad_stateid
;
4317 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4318 &lock
->v
.new.clientid
))
4320 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4321 &lock_stp
, &new_state
);
4323 status
= nfs4_preprocess_seqid_op(cstate
,
4324 lock
->lk_old_lock_seqid
,
4325 &lock
->lk_old_lock_stateid
,
4326 NFS4_LOCK_STID
, &lock_stp
, nn
);
4329 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4331 lkflg
= setlkflg(lock
->lk_type
);
4332 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4336 status
= nfserr_grace
;
4337 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4339 status
= nfserr_no_grace
;
4340 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4343 file_lock
= locks_alloc_lock();
4345 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4346 status
= nfserr_jukebox
;
4350 locks_init_lock(file_lock
);
4351 switch (lock
->lk_type
) {
4354 filp
= find_readable_file(lock_stp
->st_file
);
4356 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4357 file_lock
->fl_type
= F_RDLCK
;
4360 case NFS4_WRITEW_LT
:
4361 filp
= find_writeable_file(lock_stp
->st_file
);
4363 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4364 file_lock
->fl_type
= F_WRLCK
;
4367 status
= nfserr_inval
;
4371 status
= nfserr_openmode
;
4374 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4375 file_lock
->fl_pid
= current
->tgid
;
4376 file_lock
->fl_file
= filp
;
4377 file_lock
->fl_flags
= FL_POSIX
;
4378 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4379 file_lock
->fl_start
= lock
->lk_offset
;
4380 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4381 nfs4_transform_lock_offset(file_lock
);
4383 conflock
= locks_alloc_lock();
4385 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4386 status
= nfserr_jukebox
;
4390 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4392 case 0: /* success! */
4393 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4394 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4398 case (EAGAIN
): /* conflock holds conflicting lock */
4399 status
= nfserr_denied
;
4400 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4401 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4404 status
= nfserr_deadlock
;
4407 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4408 status
= nfserrno(err
);
4412 if (status
&& new_state
)
4413 release_lockowner(lock_sop
);
4414 nfsd4_bump_seqid(cstate
, status
);
4415 if (!cstate
->replay_owner
)
4416 nfs4_unlock_state();
4418 locks_free_lock(file_lock
);
4420 locks_free_lock(conflock
);
4425 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4426 * so we do a temporary open here just to get an open file to pass to
4427 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4430 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4433 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4435 err
= nfserrno(vfs_test_lock(file
, lock
));
4445 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4446 struct nfsd4_lockt
*lockt
)
4448 struct inode
*inode
;
4449 struct file_lock
*file_lock
= NULL
;
4450 struct nfs4_lockowner
*lo
;
4452 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4454 if (locks_in_grace(SVC_NET(rqstp
)))
4455 return nfserr_grace
;
4457 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4458 return nfserr_inval
;
4462 if (!nfsd4_has_session(cstate
)) {
4463 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4468 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4471 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4472 file_lock
= locks_alloc_lock();
4474 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4475 status
= nfserr_jukebox
;
4478 locks_init_lock(file_lock
);
4479 switch (lockt
->lt_type
) {
4482 file_lock
->fl_type
= F_RDLCK
;
4485 case NFS4_WRITEW_LT
:
4486 file_lock
->fl_type
= F_WRLCK
;
4489 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4490 status
= nfserr_inval
;
4494 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4496 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4497 file_lock
->fl_pid
= current
->tgid
;
4498 file_lock
->fl_flags
= FL_POSIX
;
4500 file_lock
->fl_start
= lockt
->lt_offset
;
4501 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4503 nfs4_transform_lock_offset(file_lock
);
4505 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4509 if (file_lock
->fl_type
!= F_UNLCK
) {
4510 status
= nfserr_denied
;
4511 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4514 nfs4_unlock_state();
4516 locks_free_lock(file_lock
);
4521 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4522 struct nfsd4_locku
*locku
)
4524 struct nfs4_ol_stateid
*stp
;
4525 struct file
*filp
= NULL
;
4526 struct file_lock
*file_lock
= NULL
;
4529 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4531 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4532 (long long) locku
->lu_offset
,
4533 (long long) locku
->lu_length
);
4535 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4536 return nfserr_inval
;
4540 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4541 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4545 filp
= find_any_file(stp
->st_file
);
4547 status
= nfserr_lock_range
;
4550 file_lock
= locks_alloc_lock();
4552 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4553 status
= nfserr_jukebox
;
4556 locks_init_lock(file_lock
);
4557 file_lock
->fl_type
= F_UNLCK
;
4558 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4559 file_lock
->fl_pid
= current
->tgid
;
4560 file_lock
->fl_file
= filp
;
4561 file_lock
->fl_flags
= FL_POSIX
;
4562 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4563 file_lock
->fl_start
= locku
->lu_offset
;
4565 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4567 nfs4_transform_lock_offset(file_lock
);
4569 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4571 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4574 update_stateid(&stp
->st_stid
.sc_stateid
);
4575 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4578 nfsd4_bump_seqid(cstate
, status
);
4579 if (!cstate
->replay_owner
)
4580 nfs4_unlock_state();
4582 locks_free_lock(file_lock
);
4586 status
= nfserrno(err
);
4592 * 1: locks held by lockowner
4593 * 0: no locks held by lockowner
4596 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4598 struct file_lock
**flpp
;
4599 struct inode
*inode
= filp
->fi_inode
;
4602 spin_lock(&inode
->i_lock
);
4603 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4604 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4610 spin_unlock(&inode
->i_lock
);
4615 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4616 struct nfsd4_compound_state
*cstate
,
4617 struct nfsd4_release_lockowner
*rlockowner
)
4619 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4620 struct nfs4_stateowner
*sop
;
4621 struct nfs4_lockowner
*lo
;
4622 struct nfs4_ol_stateid
*stp
;
4623 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4624 struct list_head matches
;
4625 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4627 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4629 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4630 clid
->cl_boot
, clid
->cl_id
);
4634 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4638 status
= nfserr_locks_held
;
4639 INIT_LIST_HEAD(&matches
);
4641 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4642 if (sop
->so_is_open_owner
)
4644 if (!same_owner_str(sop
, owner
, clid
))
4646 list_for_each_entry(stp
, &sop
->so_stateids
,
4648 lo
= lockowner(sop
);
4649 if (check_for_locks(stp
->st_file
, lo
))
4651 list_add(&lo
->lo_list
, &matches
);
4654 /* Clients probably won't expect us to return with some (but not all)
4655 * of the lockowner state released; so don't release any until all
4656 * have been checked. */
4658 while (!list_empty(&matches
)) {
4659 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4661 /* unhash_stateowner deletes so_perclient only
4662 * for openowners. */
4663 list_del(&lo
->lo_list
);
4664 release_lockowner(lo
);
4667 nfs4_unlock_state();
4671 static inline struct nfs4_client_reclaim
*
4674 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4678 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4680 struct nfs4_client_reclaim
*crp
;
4682 crp
= nfsd4_find_reclaim_client(name
, nn
);
4683 return (crp
&& crp
->cr_clp
);
4687 * failure => all reset bets are off, nfserr_no_grace...
4689 struct nfs4_client_reclaim
*
4690 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4692 unsigned int strhashval
;
4693 struct nfs4_client_reclaim
*crp
;
4695 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4696 crp
= alloc_reclaim();
4698 strhashval
= clientstr_hashval(name
);
4699 INIT_LIST_HEAD(&crp
->cr_strhash
);
4700 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4701 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4703 nn
->reclaim_str_hashtbl_size
++;
4709 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4711 list_del(&crp
->cr_strhash
);
4713 nn
->reclaim_str_hashtbl_size
--;
4717 nfs4_release_reclaim(struct nfsd_net
*nn
)
4719 struct nfs4_client_reclaim
*crp
= NULL
;
4722 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4723 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4724 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4725 struct nfs4_client_reclaim
, cr_strhash
);
4726 nfs4_remove_reclaim_record(crp
, nn
);
4729 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4733 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4734 struct nfs4_client_reclaim
*
4735 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4737 unsigned int strhashval
;
4738 struct nfs4_client_reclaim
*crp
= NULL
;
4740 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4742 strhashval
= clientstr_hashval(recdir
);
4743 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4744 if (same_name(crp
->cr_recdir
, recdir
)) {
4752 * Called from OPEN. Look for clientid in reclaim list.
4755 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4757 struct nfs4_client
*clp
;
4759 /* find clientid in conf_id_hashtbl */
4760 clp
= find_confirmed_client(clid
, sessions
, nn
);
4762 return nfserr_reclaim_bad
;
4764 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4767 #ifdef CONFIG_NFSD_FAULT_INJECTION
4769 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4771 if (mark_client_expired(clp
))
4777 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4779 char buf
[INET6_ADDRSTRLEN
];
4780 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4781 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4785 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4788 char buf
[INET6_ADDRSTRLEN
];
4789 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4790 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4793 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4795 struct nfs4_openowner
*oop
;
4796 struct nfs4_lockowner
*lop
, *lo_next
;
4797 struct nfs4_ol_stateid
*stp
, *st_next
;
4800 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4801 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4802 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4814 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4816 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4819 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4821 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4822 nfsd_print_count(clp
, count
, "locked files");
4826 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4828 struct nfs4_openowner
*oop
, *next
;
4831 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4841 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4843 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4846 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4848 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4849 nfsd_print_count(clp
, count
, "open files");
4853 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4854 struct list_head
*victims
)
4856 struct nfs4_delegation
*dp
, *next
;
4859 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4861 list_move(&dp
->dl_recall_lru
, victims
);
4868 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4870 struct nfs4_delegation
*dp
, *next
;
4874 spin_lock(&recall_lock
);
4875 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4876 spin_unlock(&recall_lock
);
4878 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4879 revoke_delegation(dp
);
4884 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4886 struct nfs4_delegation
*dp
, *next
;
4890 spin_lock(&recall_lock
);
4891 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4892 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4893 nfsd_break_one_deleg(dp
);
4894 spin_unlock(&recall_lock
);
4899 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4903 spin_lock(&recall_lock
);
4904 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4905 spin_unlock(&recall_lock
);
4907 nfsd_print_count(clp
, count
, "delegations");
4911 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4913 struct nfs4_client
*clp
, *next
;
4915 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4917 if (!nfsd_netns_ready(nn
))
4920 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4921 count
+= func(clp
, max
- count
);
4922 if ((max
!= 0) && (count
>= max
))
4929 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4931 struct nfs4_client
*clp
;
4932 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4934 if (!nfsd_netns_ready(nn
))
4937 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4938 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4944 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4946 /* initialization to perform at module load time: */
4949 nfs4_state_init(void)
4954 * Since the lifetime of a delegation isn't limited to that of an open, a
4955 * client may quite reasonably hang on to a delegation as long as it has
4956 * the inode cached. This becomes an obvious problem the first time a
4957 * client's inode cache approaches the size of the server's total memory.
4959 * For now we avoid this problem by imposing a hard limit on the number
4960 * of delegations, which varies according to the server's memory size.
4963 set_max_delegations(void)
4966 * Allow at most 4 delegations per megabyte of RAM. Quick
4967 * estimates suggest that in the worst case (where every delegation
4968 * is for a different inode), a delegation could take about 1.5K,
4969 * giving a worst case usage of about 6% of memory.
4971 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4974 static int nfs4_state_create_net(struct net
*net
)
4976 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4979 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4980 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4981 if (!nn
->conf_id_hashtbl
)
4983 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4984 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4985 if (!nn
->unconf_id_hashtbl
)
4987 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4988 OWNER_HASH_SIZE
, GFP_KERNEL
);
4989 if (!nn
->ownerstr_hashtbl
)
4991 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4992 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4993 if (!nn
->lockowner_ino_hashtbl
)
4994 goto err_lockowner_ino
;
4995 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4996 SESSION_HASH_SIZE
, GFP_KERNEL
);
4997 if (!nn
->sessionid_hashtbl
)
5000 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5001 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
5002 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
5004 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
5005 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
5006 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
5007 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
5008 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
5009 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
5010 nn
->conf_name_tree
= RB_ROOT
;
5011 nn
->unconf_name_tree
= RB_ROOT
;
5012 INIT_LIST_HEAD(&nn
->client_lru
);
5013 INIT_LIST_HEAD(&nn
->close_lru
);
5014 INIT_LIST_HEAD(&nn
->del_recall_lru
);
5015 spin_lock_init(&nn
->client_lock
);
5017 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
5023 kfree(nn
->lockowner_ino_hashtbl
);
5025 kfree(nn
->ownerstr_hashtbl
);
5027 kfree(nn
->unconf_id_hashtbl
);
5029 kfree(nn
->conf_id_hashtbl
);
5035 nfs4_state_destroy_net(struct net
*net
)
5038 struct nfs4_client
*clp
= NULL
;
5039 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5040 struct rb_node
*node
, *tmp
;
5042 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
5043 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
5044 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
5045 destroy_client(clp
);
5049 node
= rb_first(&nn
->unconf_name_tree
);
5050 while (node
!= NULL
) {
5052 node
= rb_next(tmp
);
5053 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
5054 rb_erase(tmp
, &nn
->unconf_name_tree
);
5055 destroy_client(clp
);
5058 kfree(nn
->sessionid_hashtbl
);
5059 kfree(nn
->lockowner_ino_hashtbl
);
5060 kfree(nn
->ownerstr_hashtbl
);
5061 kfree(nn
->unconf_id_hashtbl
);
5062 kfree(nn
->conf_id_hashtbl
);
5067 nfs4_state_start_net(struct net
*net
)
5069 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5072 ret
= nfs4_state_create_net(net
);
5075 nfsd4_client_tracking_init(net
);
5076 nn
->boot_time
= get_seconds();
5077 locks_start_grace(net
, &nn
->nfsd4_manager
);
5078 nn
->grace_ended
= false;
5079 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
5080 nn
->nfsd4_grace
, net
);
5081 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
5085 /* initialization to perform when the nfsd service is started: */
5088 nfs4_state_start(void)
5092 ret
= set_callback_cred();
5095 laundry_wq
= create_singlethread_workqueue("nfsd4");
5096 if (laundry_wq
== NULL
) {
5100 ret
= nfsd4_create_callback_queue();
5102 goto out_free_laundry
;
5104 set_max_delegations();
5109 destroy_workqueue(laundry_wq
);
5114 /* should be called with the state lock held */
5116 nfs4_state_shutdown_net(struct net
*net
)
5118 struct nfs4_delegation
*dp
= NULL
;
5119 struct list_head
*pos
, *next
, reaplist
;
5120 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
5122 cancel_delayed_work_sync(&nn
->laundromat_work
);
5123 locks_end_grace(&nn
->nfsd4_manager
);
5125 INIT_LIST_HEAD(&reaplist
);
5126 spin_lock(&recall_lock
);
5127 list_for_each_safe(pos
, next
, &nn
->del_recall_lru
) {
5128 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5129 list_move(&dp
->dl_recall_lru
, &reaplist
);
5131 spin_unlock(&recall_lock
);
5132 list_for_each_safe(pos
, next
, &reaplist
) {
5133 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
5134 destroy_delegation(dp
);
5137 nfsd4_client_tracking_exit(net
);
5138 nfs4_state_destroy_net(net
);
5142 nfs4_state_shutdown(void)
5144 destroy_workqueue(laundry_wq
);
5145 nfsd4_destroy_callback_queue();
5149 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5151 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5152 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5156 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5158 if (cstate
->minorversion
) {
5159 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5160 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5165 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5167 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5171 * functions to set current state id
5174 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5176 put_stateid(cstate
, &odp
->od_stateid
);
5180 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5182 put_stateid(cstate
, &open
->op_stateid
);
5186 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5188 put_stateid(cstate
, &close
->cl_stateid
);
5192 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5194 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5198 * functions to consume current state id
5202 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5204 get_stateid(cstate
, &odp
->od_stateid
);
5208 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5210 get_stateid(cstate
, &drp
->dr_stateid
);
5214 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5216 get_stateid(cstate
, &fsp
->fr_stateid
);
5220 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5222 get_stateid(cstate
, &setattr
->sa_stateid
);
5226 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5228 get_stateid(cstate
, &close
->cl_stateid
);
5232 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5234 get_stateid(cstate
, &locku
->lu_stateid
);
5238 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5240 get_stateid(cstate
, &read
->rd_stateid
);
5244 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5246 get_stateid(cstate
, &write
->wr_stateid
);