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>
46 #include "current_stateid.h"
50 #define NFSDDBG_FACILITY NFSDDBG_PROC
52 #define all_ones {{~0,~0},~0}
53 static const stateid_t one_stateid
= {
55 .si_opaque
= all_ones
,
57 static const stateid_t zero_stateid
= {
60 static const stateid_t currentstateid
= {
64 static u64 current_sessionid
= 1;
66 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
67 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
68 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
75 /* Currently used for almost all code touching nfsv4 state: */
76 static DEFINE_MUTEX(client_mutex
);
79 * Currently used for the del_recall_lru and file hash table. In an
80 * effort to decrease the scope of the client_mutex, this spinlock may
81 * eventually cover more:
83 static DEFINE_SPINLOCK(recall_lock
);
85 static struct kmem_cache
*openowner_slab
= NULL
;
86 static struct kmem_cache
*lockowner_slab
= NULL
;
87 static struct kmem_cache
*file_slab
= NULL
;
88 static struct kmem_cache
*stateid_slab
= NULL
;
89 static struct kmem_cache
*deleg_slab
= NULL
;
94 mutex_lock(&client_mutex
);
97 static void free_session(struct kref
*);
99 /* Must be called under the client_lock */
100 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
102 kref_put(&ses
->se_ref
, free_session
);
105 static void nfsd4_get_session(struct nfsd4_session
*ses
)
107 kref_get(&ses
->se_ref
);
111 nfs4_unlock_state(void)
113 mutex_unlock(&client_mutex
);
117 opaque_hashval(const void *ptr
, int nbytes
)
119 unsigned char *cptr
= (unsigned char *) ptr
;
129 static struct list_head del_recall_lru
;
131 static void nfsd4_free_file(struct nfs4_file
*f
)
133 kmem_cache_free(file_slab
, f
);
137 put_nfs4_file(struct nfs4_file
*fi
)
139 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
140 list_del(&fi
->fi_hash
);
141 spin_unlock(&recall_lock
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 atomic_inc(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned long max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for lock and open owners */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
169 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
171 return ret
& OWNER_HASH_MASK
;
174 /* hash table for nfs4_file */
175 #define FILE_HASH_BITS 8
176 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
178 static unsigned int file_hashval(struct inode
*ino
)
180 /* XXX: why are we hashing on inode pointer, anyway? */
181 return hash_ptr(ino
, FILE_HASH_BITS
);
184 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
186 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
188 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
189 atomic_inc(&fp
->fi_access
[oflag
]);
192 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
194 if (oflag
== O_RDWR
) {
195 __nfs4_file_get_access(fp
, O_RDONLY
);
196 __nfs4_file_get_access(fp
, O_WRONLY
);
198 __nfs4_file_get_access(fp
, oflag
);
201 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
203 if (fp
->fi_fds
[oflag
]) {
204 fput(fp
->fi_fds
[oflag
]);
205 fp
->fi_fds
[oflag
] = NULL
;
209 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
211 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
212 nfs4_file_put_fd(fp
, oflag
);
214 * It's also safe to get rid of the RDWR open *if*
215 * we no longer have need of the other kind of access
216 * or if we already have the other kind of open:
218 if (fp
->fi_fds
[1-oflag
]
219 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
220 nfs4_file_put_fd(fp
, O_RDWR
);
224 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
226 if (oflag
== O_RDWR
) {
227 __nfs4_file_put_access(fp
, O_RDONLY
);
228 __nfs4_file_put_access(fp
, O_WRONLY
);
230 __nfs4_file_put_access(fp
, oflag
);
233 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct
236 struct idr
*stateids
= &cl
->cl_stateids
;
237 static int min_stateid
= 0;
238 struct nfs4_stid
*stid
;
241 stid
= kmem_cache_alloc(slab
, GFP_KERNEL
);
245 new_id
= idr_alloc(stateids
, stid
, min_stateid
, 0, GFP_KERNEL
);
248 stid
->sc_client
= cl
;
250 stid
->sc_stateid
.si_opaque
.so_id
= new_id
;
251 stid
->sc_stateid
.si_opaque
.so_clid
= cl
->cl_clientid
;
252 /* Will be incremented before return to client: */
253 stid
->sc_stateid
.si_generation
= 0;
256 * It shouldn't be a problem to reuse an opaque stateid value.
257 * I don't think it is for 4.1. But with 4.0 I worry that, for
258 * example, a stray write retransmission could be accepted by
259 * the server when it should have been rejected. Therefore,
260 * adopt a trick from the sctp code to attempt to maximize the
261 * amount of time until an id is reused, by ensuring they always
262 * "increase" (mod INT_MAX):
265 min_stateid
= new_id
+1;
266 if (min_stateid
== INT_MAX
)
274 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
276 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
279 static struct nfs4_delegation
*
280 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
282 struct nfs4_delegation
*dp
;
283 struct nfs4_file
*fp
= stp
->st_file
;
285 dprintk("NFSD alloc_init_deleg\n");
287 * Major work on the lease subsystem (for example, to support
288 * calbacks on stat) will be required before we can support
289 * write delegations properly.
291 if (type
!= NFS4_OPEN_DELEGATE_READ
)
293 if (fp
->fi_had_conflict
)
295 if (num_delegations
> max_delegations
)
297 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
300 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
302 * delegation seqid's are never incremented. The 4.1 special
303 * meaning of seqid 0 isn't meaningful, really, but let's avoid
304 * 0 anyway just for consistency and use 1:
306 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
308 INIT_LIST_HEAD(&dp
->dl_perfile
);
309 INIT_LIST_HEAD(&dp
->dl_perclnt
);
310 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
314 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
316 atomic_set(&dp
->dl_count
, 1);
317 nfsd4_init_callback(&dp
->dl_recall
);
321 static void free_stid(struct nfs4_stid
*s
, struct kmem_cache
*slab
)
323 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
325 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
326 kmem_cache_free(slab
, s
);
330 nfs4_put_delegation(struct nfs4_delegation
*dp
)
332 if (atomic_dec_and_test(&dp
->dl_count
)) {
333 dprintk("NFSD: freeing dp %p\n",dp
);
334 put_nfs4_file(dp
->dl_file
);
335 free_stid(&dp
->dl_stid
, deleg_slab
);
340 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
342 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
343 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
345 fput(fp
->fi_deleg_file
);
346 fp
->fi_deleg_file
= NULL
;
350 static void unhash_stid(struct nfs4_stid
*s
)
355 /* Called under the state lock. */
357 unhash_delegation(struct nfs4_delegation
*dp
)
359 unhash_stid(&dp
->dl_stid
);
360 list_del_init(&dp
->dl_perclnt
);
361 spin_lock(&recall_lock
);
362 list_del_init(&dp
->dl_perfile
);
363 list_del_init(&dp
->dl_recall_lru
);
364 spin_unlock(&recall_lock
);
365 nfs4_put_deleg_lease(dp
->dl_file
);
366 nfs4_put_delegation(dp
);
373 static unsigned int clientid_hashval(u32 id
)
375 return id
& CLIENT_HASH_MASK
;
378 static unsigned int clientstr_hashval(const char *name
)
380 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
384 * We store the NONE, READ, WRITE, and BOTH bits separately in the
385 * st_{access,deny}_bmap field of the stateid, in order to track not
386 * only what share bits are currently in force, but also what
387 * combinations of share bits previous opens have used. This allows us
388 * to enforce the recommendation of rfc 3530 14.2.19 that the server
389 * return an error if the client attempt to downgrade to a combination
390 * of share bits not explicable by closing some of its previous opens.
392 * XXX: This enforcement is actually incomplete, since we don't keep
393 * track of access/deny bit combinations; so, e.g., we allow:
395 * OPEN allow read, deny write
396 * OPEN allow both, deny none
397 * DOWNGRADE allow read, deny none
399 * which we should reject.
402 bmap_to_share_mode(unsigned long bmap
) {
404 unsigned int access
= 0;
406 for (i
= 1; i
< 4; i
++) {
407 if (test_bit(i
, &bmap
))
414 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
415 unsigned int access
, deny
;
417 access
= bmap_to_share_mode(stp
->st_access_bmap
);
418 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
419 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
424 /* set share access for a given stateid */
426 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
428 __set_bit(access
, &stp
->st_access_bmap
);
431 /* clear share access for a given stateid */
433 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
435 __clear_bit(access
, &stp
->st_access_bmap
);
438 /* test whether a given stateid has access */
440 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
442 return test_bit(access
, &stp
->st_access_bmap
);
445 /* set share deny for a given stateid */
447 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
449 __set_bit(access
, &stp
->st_deny_bmap
);
452 /* clear share deny for a given stateid */
454 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
456 __clear_bit(access
, &stp
->st_deny_bmap
);
459 /* test whether a given stateid is denying specific access */
461 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
463 return test_bit(access
, &stp
->st_deny_bmap
);
466 static int nfs4_access_to_omode(u32 access
)
468 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
469 case NFS4_SHARE_ACCESS_READ
:
471 case NFS4_SHARE_ACCESS_WRITE
:
473 case NFS4_SHARE_ACCESS_BOTH
:
480 /* release all access and file references for a given stateid */
482 release_all_access(struct nfs4_ol_stateid
*stp
)
486 for (i
= 1; i
< 4; i
++) {
487 if (test_access(i
, stp
))
488 nfs4_file_put_access(stp
->st_file
,
489 nfs4_access_to_omode(i
));
490 clear_access(i
, stp
);
494 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
496 list_del(&stp
->st_perfile
);
497 list_del(&stp
->st_perstateowner
);
500 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
502 release_all_access(stp
);
503 put_nfs4_file(stp
->st_file
);
507 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
509 free_stid(&stp
->st_stid
, stateid_slab
);
512 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
516 unhash_generic_stateid(stp
);
517 unhash_stid(&stp
->st_stid
);
518 file
= find_any_file(stp
->st_file
);
520 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
521 close_generic_stateid(stp
);
522 free_generic_stateid(stp
);
525 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
527 struct nfs4_ol_stateid
*stp
;
529 list_del(&lo
->lo_owner
.so_strhash
);
530 list_del(&lo
->lo_perstateid
);
531 list_del(&lo
->lo_owner_ino_hash
);
532 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
533 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
534 struct nfs4_ol_stateid
, st_perstateowner
);
535 release_lock_stateid(stp
);
539 static void release_lockowner(struct nfs4_lockowner
*lo
)
541 unhash_lockowner(lo
);
542 nfs4_free_lockowner(lo
);
546 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
548 struct nfs4_lockowner
*lo
;
550 while (!list_empty(&open_stp
->st_lockowners
)) {
551 lo
= list_entry(open_stp
->st_lockowners
.next
,
552 struct nfs4_lockowner
, lo_perstateid
);
553 release_lockowner(lo
);
557 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
559 unhash_generic_stateid(stp
);
560 release_stateid_lockowners(stp
);
561 close_generic_stateid(stp
);
564 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
566 unhash_open_stateid(stp
);
567 unhash_stid(&stp
->st_stid
);
568 free_generic_stateid(stp
);
571 static void unhash_openowner(struct nfs4_openowner
*oo
)
573 struct nfs4_ol_stateid
*stp
;
575 list_del(&oo
->oo_owner
.so_strhash
);
576 list_del(&oo
->oo_perclient
);
577 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
578 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
579 struct nfs4_ol_stateid
, st_perstateowner
);
580 release_open_stateid(stp
);
584 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
586 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
589 unhash_stid(&s
->st_stid
);
590 free_generic_stateid(s
);
591 oo
->oo_last_closed_stid
= NULL
;
595 static void release_openowner(struct nfs4_openowner
*oo
)
597 unhash_openowner(oo
);
598 list_del(&oo
->oo_close_lru
);
599 release_last_closed_stateid(oo
);
600 nfs4_free_openowner(oo
);
604 hash_sessionid(struct nfs4_sessionid
*sessionid
)
606 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
608 return sid
->sequence
% SESSION_HASH_SIZE
;
613 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
615 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
616 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
620 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
627 gen_sessionid(struct nfsd4_session
*ses
)
629 struct nfs4_client
*clp
= ses
->se_client
;
630 struct nfsd4_sessionid
*sid
;
632 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
633 sid
->clientid
= clp
->cl_clientid
;
634 sid
->sequence
= current_sessionid
++;
639 * The protocol defines ca_maxresponssize_cached to include the size of
640 * the rpc header, but all we need to cache is the data starting after
641 * the end of the initial SEQUENCE operation--the rest we regenerate
642 * each time. Therefore we can advertise a ca_maxresponssize_cached
643 * value that is the number of bytes in our cache plus a few additional
644 * bytes. In order to stay on the safe side, and not promise more than
645 * we can cache, those additional bytes must be the minimum possible: 24
646 * bytes of rpc header (xid through accept state, with AUTH_NULL
647 * verifier), 12 for the compound header (with zero-length tag), and 44
648 * for the SEQUENCE op response:
650 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
653 free_session_slots(struct nfsd4_session
*ses
)
657 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
658 kfree(ses
->se_slots
[i
]);
662 * We don't actually need to cache the rpc and session headers, so we
663 * can allocate a little less for each slot:
665 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
667 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
670 static int nfsd4_sanitize_slot_size(u32 size
)
672 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
673 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
679 * XXX: If we run out of reserved DRC memory we could (up to a point)
680 * re-negotiate active sessions and reduce their slot usage to make
681 * room for new connections. For now we just fail the create session.
683 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
687 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
689 spin_lock(&nfsd_drc_lock
);
690 avail
= min((unsigned long)NFSD_MAX_MEM_PER_SESSION
,
691 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
692 num
= min_t(int, num
, avail
/ slotsize
);
693 nfsd_drc_mem_used
+= num
* slotsize
;
694 spin_unlock(&nfsd_drc_lock
);
699 static void nfsd4_put_drc_mem(int slotsize
, int num
)
701 spin_lock(&nfsd_drc_lock
);
702 nfsd_drc_mem_used
-= slotsize
* num
;
703 spin_unlock(&nfsd_drc_lock
);
706 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
708 struct nfsd4_session
*new;
711 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
712 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
713 mem
= numslots
* sizeof(struct nfsd4_slot
*);
715 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
718 /* allocate each struct nfsd4_slot and data cache in one piece */
719 for (i
= 0; i
< numslots
; i
++) {
720 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
721 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
722 if (!new->se_slots
[i
])
728 kfree(new->se_slots
[i
]);
733 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new,
734 struct nfsd4_channel_attrs
*req
,
735 int numslots
, int slotsize
,
738 u32 maxrpc
= nn
->nfsd_serv
->sv_max_mesg
;
740 new->maxreqs
= numslots
;
741 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
742 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
743 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
744 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
745 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
748 static void free_conn(struct nfsd4_conn
*c
)
750 svc_xprt_put(c
->cn_xprt
);
754 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
756 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
757 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
759 spin_lock(&clp
->cl_lock
);
760 if (!list_empty(&c
->cn_persession
)) {
761 list_del(&c
->cn_persession
);
764 spin_unlock(&clp
->cl_lock
);
765 nfsd4_probe_callback(clp
);
768 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
770 struct nfsd4_conn
*conn
;
772 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
775 svc_xprt_get(rqstp
->rq_xprt
);
776 conn
->cn_xprt
= rqstp
->rq_xprt
;
777 conn
->cn_flags
= flags
;
778 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
782 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
784 conn
->cn_session
= ses
;
785 list_add(&conn
->cn_persession
, &ses
->se_conns
);
788 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
790 struct nfs4_client
*clp
= ses
->se_client
;
792 spin_lock(&clp
->cl_lock
);
793 __nfsd4_hash_conn(conn
, ses
);
794 spin_unlock(&clp
->cl_lock
);
797 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
799 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
800 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
803 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
807 nfsd4_hash_conn(conn
, ses
);
808 ret
= nfsd4_register_conn(conn
);
810 /* oops; xprt is already down: */
811 nfsd4_conn_lost(&conn
->cn_xpt_user
);
812 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
813 /* callback channel may be back up */
814 nfsd4_probe_callback(ses
->se_client
);
818 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
820 u32 dir
= NFS4_CDFC4_FORE
;
822 if (cses
->flags
& SESSION4_BACK_CHAN
)
823 dir
|= NFS4_CDFC4_BACK
;
824 return alloc_conn(rqstp
, dir
);
827 /* must be called under client_lock */
828 static void nfsd4_del_conns(struct nfsd4_session
*s
)
830 struct nfs4_client
*clp
= s
->se_client
;
831 struct nfsd4_conn
*c
;
833 spin_lock(&clp
->cl_lock
);
834 while (!list_empty(&s
->se_conns
)) {
835 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
836 list_del_init(&c
->cn_persession
);
837 spin_unlock(&clp
->cl_lock
);
839 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
842 spin_lock(&clp
->cl_lock
);
844 spin_unlock(&clp
->cl_lock
);
847 static void __free_session(struct nfsd4_session
*ses
)
849 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
850 free_session_slots(ses
);
854 static void free_session(struct kref
*kref
)
856 struct nfsd4_session
*ses
;
859 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
860 nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
862 lockdep_assert_held(&nn
->client_lock
);
863 nfsd4_del_conns(ses
);
867 void nfsd4_put_session(struct nfsd4_session
*ses
)
869 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
871 spin_lock(&nn
->client_lock
);
872 nfsd4_put_session_locked(ses
);
873 spin_unlock(&nn
->client_lock
);
876 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
,
879 struct nfsd4_session
*new;
880 int numslots
, slotsize
;
882 * Note decreasing slot size below client's request may
883 * make it difficult for client to function correctly, whereas
884 * decreasing the number of slots will (just?) affect
885 * performance. When short on memory we therefore prefer to
886 * decrease number of slots instead of their size.
888 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
889 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
893 new = __alloc_session(slotsize
, numslots
);
895 nfsd4_put_drc_mem(slotsize
, numslots
);
898 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
, nn
);
902 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
905 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
907 new->se_client
= clp
;
910 INIT_LIST_HEAD(&new->se_conns
);
912 new->se_cb_seq_nr
= 1;
913 new->se_flags
= cses
->flags
;
914 new->se_cb_prog
= cses
->callback_prog
;
915 new->se_cb_sec
= cses
->cb_sec
;
916 kref_init(&new->se_ref
);
917 idx
= hash_sessionid(&new->se_sessionid
);
918 spin_lock(&nn
->client_lock
);
919 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
920 spin_lock(&clp
->cl_lock
);
921 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
922 spin_unlock(&clp
->cl_lock
);
923 spin_unlock(&nn
->client_lock
);
925 if (cses
->flags
& SESSION4_BACK_CHAN
) {
926 struct sockaddr
*sa
= svc_addr(rqstp
);
928 * This is a little silly; with sessions there's no real
929 * use for the callback address. Use the peer address
930 * as a reasonable default for now, but consider fixing
931 * the rpc client not to require an address in the
934 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
935 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
939 /* caller must hold client_lock */
940 static struct nfsd4_session
*
941 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
943 struct nfsd4_session
*elem
;
945 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
947 dump_sessionid(__func__
, sessionid
);
948 idx
= hash_sessionid(sessionid
);
949 /* Search in the appropriate list */
950 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
951 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
952 NFS4_MAX_SESSIONID_LEN
)) {
957 dprintk("%s: session not found\n", __func__
);
961 /* caller must hold client_lock */
963 unhash_session(struct nfsd4_session
*ses
)
965 list_del(&ses
->se_hash
);
966 spin_lock(&ses
->se_client
->cl_lock
);
967 list_del(&ses
->se_perclnt
);
968 spin_unlock(&ses
->se_client
->cl_lock
);
971 /* must be called under the client_lock */
973 renew_client_locked(struct nfs4_client
*clp
)
975 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
977 if (is_client_expired(clp
)) {
979 printk("%s: client (clientid %08x/%08x) already expired\n",
981 clp
->cl_clientid
.cl_boot
,
982 clp
->cl_clientid
.cl_id
);
986 dprintk("renewing client (clientid %08x/%08x)\n",
987 clp
->cl_clientid
.cl_boot
,
988 clp
->cl_clientid
.cl_id
);
989 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
990 clp
->cl_time
= get_seconds();
994 renew_client(struct nfs4_client
*clp
)
996 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
998 spin_lock(&nn
->client_lock
);
999 renew_client_locked(clp
);
1000 spin_unlock(&nn
->client_lock
);
1003 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1005 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1007 if (clid
->cl_boot
== nn
->boot_time
)
1009 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1010 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1015 * XXX Should we use a slab cache ?
1016 * This type of memory management is somewhat inefficient, but we use it
1017 * anyway since SETCLIENTID is not a common operation.
1019 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1021 struct nfs4_client
*clp
;
1023 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1026 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1027 if (clp
->cl_name
.data
== NULL
) {
1031 clp
->cl_name
.len
= name
.len
;
1036 free_client(struct nfs4_client
*clp
)
1038 struct nfsd_net __maybe_unused
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1040 lockdep_assert_held(&nn
->client_lock
);
1041 while (!list_empty(&clp
->cl_sessions
)) {
1042 struct nfsd4_session
*ses
;
1043 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1045 list_del(&ses
->se_perclnt
);
1046 nfsd4_put_session_locked(ses
);
1048 free_svc_cred(&clp
->cl_cred
);
1049 kfree(clp
->cl_name
.data
);
1050 idr_destroy(&clp
->cl_stateids
);
1055 release_session_client(struct nfsd4_session
*session
)
1057 struct nfs4_client
*clp
= session
->se_client
;
1058 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1060 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
1062 if (is_client_expired(clp
)) {
1064 session
->se_client
= NULL
;
1066 renew_client_locked(clp
);
1067 spin_unlock(&nn
->client_lock
);
1070 /* must be called under the client_lock */
1072 unhash_client_locked(struct nfs4_client
*clp
)
1074 struct nfsd4_session
*ses
;
1076 mark_client_expired(clp
);
1077 list_del(&clp
->cl_lru
);
1078 spin_lock(&clp
->cl_lock
);
1079 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1080 list_del_init(&ses
->se_hash
);
1081 spin_unlock(&clp
->cl_lock
);
1085 destroy_client(struct nfs4_client
*clp
)
1087 struct nfs4_openowner
*oo
;
1088 struct nfs4_delegation
*dp
;
1089 struct list_head reaplist
;
1090 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1092 INIT_LIST_HEAD(&reaplist
);
1093 spin_lock(&recall_lock
);
1094 while (!list_empty(&clp
->cl_delegations
)) {
1095 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1096 list_del_init(&dp
->dl_perclnt
);
1097 list_move(&dp
->dl_recall_lru
, &reaplist
);
1099 spin_unlock(&recall_lock
);
1100 while (!list_empty(&reaplist
)) {
1101 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1102 unhash_delegation(dp
);
1104 while (!list_empty(&clp
->cl_openowners
)) {
1105 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1106 release_openowner(oo
);
1108 nfsd4_shutdown_callback(clp
);
1109 if (clp
->cl_cb_conn
.cb_xprt
)
1110 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1111 list_del(&clp
->cl_idhash
);
1112 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1113 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1115 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1116 spin_lock(&nn
->client_lock
);
1117 unhash_client_locked(clp
);
1118 if (atomic_read(&clp
->cl_refcount
) == 0)
1120 spin_unlock(&nn
->client_lock
);
1123 static void expire_client(struct nfs4_client
*clp
)
1125 nfsd4_client_record_remove(clp
);
1126 destroy_client(clp
);
1129 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1131 memcpy(target
->cl_verifier
.data
, source
->data
,
1132 sizeof(target
->cl_verifier
.data
));
1135 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1137 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1138 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1141 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1143 if (source
->cr_principal
) {
1144 target
->cr_principal
=
1145 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1146 if (target
->cr_principal
== NULL
)
1149 target
->cr_principal
= NULL
;
1150 target
->cr_flavor
= source
->cr_flavor
;
1151 target
->cr_uid
= source
->cr_uid
;
1152 target
->cr_gid
= source
->cr_gid
;
1153 target
->cr_group_info
= source
->cr_group_info
;
1154 get_group_info(target
->cr_group_info
);
1159 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1163 res
= o1
->len
- o2
->len
;
1166 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1169 static int same_name(const char *n1
, const char *n2
)
1171 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1175 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1177 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1181 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1183 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1186 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1190 if (g1
->ngroups
!= g2
->ngroups
)
1192 for (i
=0; i
<g1
->ngroups
; i
++)
1193 if (!gid_eq(GROUP_AT(g1
, i
), GROUP_AT(g2
, i
)))
1199 * RFC 3530 language requires clid_inuse be returned when the
1200 * "principal" associated with a requests differs from that previously
1201 * used. We use uid, gid's, and gss principal string as our best
1202 * approximation. We also don't want to allow non-gss use of a client
1203 * established using gss: in theory cr_principal should catch that
1204 * change, but in practice cr_principal can be null even in the gss case
1205 * since gssd doesn't always pass down a principal string.
1207 static bool is_gss_cred(struct svc_cred
*cr
)
1209 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1210 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1215 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1217 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1218 || (!uid_eq(cr1
->cr_uid
, cr2
->cr_uid
))
1219 || (!gid_eq(cr1
->cr_gid
, cr2
->cr_gid
))
1220 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1222 if (cr1
->cr_principal
== cr2
->cr_principal
)
1224 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1226 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1229 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1231 static u32 current_clientid
= 1;
1233 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1234 clp
->cl_clientid
.cl_id
= current_clientid
++;
1237 static void gen_confirm(struct nfs4_client
*clp
)
1242 verf
[0] = (__be32
)get_seconds();
1243 verf
[1] = (__be32
)i
++;
1244 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1247 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1249 struct nfs4_stid
*ret
;
1251 ret
= idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1252 if (!ret
|| !ret
->sc_type
)
1257 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1259 struct nfs4_stid
*s
;
1261 s
= find_stateid(cl
, t
);
1264 if (typemask
& s
->sc_type
)
1269 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1270 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1272 struct nfs4_client
*clp
;
1273 struct sockaddr
*sa
= svc_addr(rqstp
);
1275 struct net
*net
= SVC_NET(rqstp
);
1276 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1278 clp
= alloc_client(name
);
1282 INIT_LIST_HEAD(&clp
->cl_sessions
);
1283 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1285 spin_lock(&nn
->client_lock
);
1287 spin_unlock(&nn
->client_lock
);
1290 idr_init(&clp
->cl_stateids
);
1291 atomic_set(&clp
->cl_refcount
, 0);
1292 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1293 INIT_LIST_HEAD(&clp
->cl_idhash
);
1294 INIT_LIST_HEAD(&clp
->cl_openowners
);
1295 INIT_LIST_HEAD(&clp
->cl_delegations
);
1296 INIT_LIST_HEAD(&clp
->cl_lru
);
1297 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1298 spin_lock_init(&clp
->cl_lock
);
1299 nfsd4_init_callback(&clp
->cl_cb_null
);
1300 clp
->cl_time
= get_seconds();
1301 clear_bit(0, &clp
->cl_cb_slot_busy
);
1302 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1303 copy_verf(clp
, verf
);
1304 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1306 clp
->cl_cb_session
= NULL
;
1312 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1314 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1315 struct nfs4_client
*clp
;
1318 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1321 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1322 new = &((*new)->rb_left
);
1324 new = &((*new)->rb_right
);
1327 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1328 rb_insert_color(&new_clp
->cl_namenode
, root
);
1331 static struct nfs4_client
*
1332 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1335 struct rb_node
*node
= root
->rb_node
;
1336 struct nfs4_client
*clp
;
1339 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1340 cmp
= compare_blob(&clp
->cl_name
, name
);
1342 node
= node
->rb_left
;
1344 node
= node
->rb_right
;
1352 add_to_unconfirmed(struct nfs4_client
*clp
)
1354 unsigned int idhashval
;
1355 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1357 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1358 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1359 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1360 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1365 move_to_confirmed(struct nfs4_client
*clp
)
1367 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1368 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1370 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1371 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1372 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1373 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1374 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1378 static struct nfs4_client
*
1379 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1381 struct nfs4_client
*clp
;
1382 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1384 list_for_each_entry(clp
, &nn
->conf_id_hashtbl
[idhashval
], cl_idhash
) {
1385 if (same_clid(&clp
->cl_clientid
, clid
)) {
1386 if ((bool)clp
->cl_minorversion
!= sessions
)
1395 static struct nfs4_client
*
1396 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1398 struct nfs4_client
*clp
;
1399 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1401 list_for_each_entry(clp
, &nn
->unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1402 if (same_clid(&clp
->cl_clientid
, clid
)) {
1403 if ((bool)clp
->cl_minorversion
!= sessions
)
1411 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1413 return clp
->cl_exchange_flags
!= 0;
1416 static struct nfs4_client
*
1417 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1419 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1422 static struct nfs4_client
*
1423 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1425 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1429 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1431 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1432 struct sockaddr
*sa
= svc_addr(rqstp
);
1433 u32 scopeid
= rpc_get_scope_id(sa
);
1434 unsigned short expected_family
;
1436 /* Currently, we only support tcp and tcp6 for the callback channel */
1437 if (se
->se_callback_netid_len
== 3 &&
1438 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1439 expected_family
= AF_INET
;
1440 else if (se
->se_callback_netid_len
== 4 &&
1441 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1442 expected_family
= AF_INET6
;
1446 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1447 se
->se_callback_addr_len
,
1448 (struct sockaddr
*)&conn
->cb_addr
,
1449 sizeof(conn
->cb_addr
));
1451 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1454 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1455 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1457 conn
->cb_prog
= se
->se_callback_prog
;
1458 conn
->cb_ident
= se
->se_callback_ident
;
1459 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1462 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1463 conn
->cb_addrlen
= 0;
1464 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1465 "will not receive delegations\n",
1466 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1472 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1475 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1477 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1480 dprintk("--> %s slot %p\n", __func__
, slot
);
1482 slot
->sl_opcnt
= resp
->opcnt
;
1483 slot
->sl_status
= resp
->cstate
.status
;
1485 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1486 if (nfsd4_not_cached(resp
)) {
1487 slot
->sl_datalen
= 0;
1490 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1491 base
= (char *)resp
->cstate
.datap
-
1492 (char *)resp
->xbuf
->head
[0].iov_base
;
1493 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1495 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1500 * Encode the replay sequence operation from the slot values.
1501 * If cachethis is FALSE encode the uncached rep error on the next
1502 * operation which sets resp->p and increments resp->opcnt for
1503 * nfs4svc_encode_compoundres.
1507 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1508 struct nfsd4_compoundres
*resp
)
1510 struct nfsd4_op
*op
;
1511 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1513 /* Encode the replayed sequence operation */
1514 op
= &args
->ops
[resp
->opcnt
- 1];
1515 nfsd4_encode_operation(resp
, op
);
1517 /* Return nfserr_retry_uncached_rep in next operation. */
1518 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1519 op
= &args
->ops
[resp
->opcnt
++];
1520 op
->status
= nfserr_retry_uncached_rep
;
1521 nfsd4_encode_operation(resp
, op
);
1527 * The sequence operation is not cached because we can use the slot and
1531 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1532 struct nfsd4_sequence
*seq
)
1534 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1537 dprintk("--> %s slot %p\n", __func__
, slot
);
1539 /* Either returns 0 or nfserr_retry_uncached */
1540 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1541 if (status
== nfserr_retry_uncached_rep
)
1544 /* The sequence operation has been encoded, cstate->datap set. */
1545 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1547 resp
->opcnt
= slot
->sl_opcnt
;
1548 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1549 status
= slot
->sl_status
;
1555 * Set the exchange_id flags returned by the server.
1558 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1560 /* pNFS is not supported */
1561 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1563 /* Referrals are supported, Migration is not. */
1564 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1566 /* set the wire flags to return to client. */
1567 clid
->flags
= new->cl_exchange_flags
;
1570 static bool client_has_state(struct nfs4_client
*clp
)
1573 * Note clp->cl_openowners check isn't quite right: there's no
1574 * need to count owners without stateid's.
1576 * Also note we should probably be using this in 4.0 case too.
1578 return !list_empty(&clp
->cl_openowners
)
1579 || !list_empty(&clp
->cl_delegations
)
1580 || !list_empty(&clp
->cl_sessions
);
1584 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1585 struct nfsd4_compound_state
*cstate
,
1586 struct nfsd4_exchange_id
*exid
)
1588 struct nfs4_client
*unconf
, *conf
, *new;
1590 char addr_str
[INET6_ADDRSTRLEN
];
1591 nfs4_verifier verf
= exid
->verifier
;
1592 struct sockaddr
*sa
= svc_addr(rqstp
);
1593 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1594 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1596 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1597 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1598 "ip_addr=%s flags %x, spa_how %d\n",
1599 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1600 addr_str
, exid
->flags
, exid
->spa_how
);
1602 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1603 return nfserr_inval
;
1605 /* Currently only support SP4_NONE */
1606 switch (exid
->spa_how
) {
1609 default: /* checked by xdr code */
1613 return nfserr_serverfault
; /* no excuse :-/ */
1616 /* Cases below refer to rfc 5661 section 18.35.4: */
1618 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1620 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1621 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1624 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1625 status
= nfserr_inval
;
1628 if (!creds_match
) { /* case 9 */
1629 status
= nfserr_perm
;
1632 if (!verfs_match
) { /* case 8 */
1633 status
= nfserr_not_same
;
1637 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1641 if (!creds_match
) { /* case 3 */
1642 if (client_has_state(conf
)) {
1643 status
= nfserr_clid_inuse
;
1646 expire_client(conf
);
1649 if (verfs_match
) { /* case 2 */
1650 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1654 /* case 5, client reboot */
1658 if (update
) { /* case 7 */
1659 status
= nfserr_noent
;
1663 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1664 if (unconf
) /* case 4, possible retry or client restart */
1665 expire_client(unconf
);
1667 /* case 1 (normal case) */
1669 new = create_client(exid
->clname
, rqstp
, &verf
);
1671 status
= nfserr_jukebox
;
1674 new->cl_minorversion
= 1;
1677 add_to_unconfirmed(new);
1679 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1680 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1682 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1683 nfsd4_set_ex_flags(new, exid
);
1685 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1686 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1690 nfs4_unlock_state();
1695 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1697 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1700 /* The slot is in use, and no response has been sent. */
1702 if (seqid
== slot_seqid
)
1703 return nfserr_jukebox
;
1705 return nfserr_seq_misordered
;
1707 /* Note unsigned 32-bit arithmetic handles wraparound: */
1708 if (likely(seqid
== slot_seqid
+ 1))
1710 if (seqid
== slot_seqid
)
1711 return nfserr_replay_cache
;
1712 return nfserr_seq_misordered
;
1716 * Cache the create session result into the create session single DRC
1717 * slot cache by saving the xdr structure. sl_seqid has been set.
1718 * Do this for solo or embedded create session operations.
1721 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1722 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1724 slot
->sl_status
= nfserr
;
1725 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1729 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1730 struct nfsd4_clid_slot
*slot
)
1732 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1733 return slot
->sl_status
;
1736 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1737 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1738 1 + /* MIN tag is length with zero, only length */ \
1739 3 + /* version, opcount, opcode */ \
1740 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1741 /* seqid, slotID, slotID, cache */ \
1742 4 ) * sizeof(__be32))
1744 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1745 2 + /* verifier: AUTH_NULL, length 0 */\
1747 1 + /* MIN tag is length with zero, only length */ \
1748 3 + /* opcount, opcode, opstatus*/ \
1749 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1750 /* seqid, slotID, slotID, slotID, status */ \
1751 5 ) * sizeof(__be32))
1753 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1755 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1756 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1760 nfsd4_create_session(struct svc_rqst
*rqstp
,
1761 struct nfsd4_compound_state
*cstate
,
1762 struct nfsd4_create_session
*cr_ses
)
1764 struct sockaddr
*sa
= svc_addr(rqstp
);
1765 struct nfs4_client
*conf
, *unconf
;
1766 struct nfsd4_session
*new;
1767 struct nfsd4_conn
*conn
;
1768 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1770 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1772 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1773 return nfserr_inval
;
1774 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1775 return nfserr_toosmall
;
1776 new = alloc_session(&cr_ses
->fore_channel
, nn
);
1778 return nfserr_jukebox
;
1779 status
= nfserr_jukebox
;
1780 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1782 goto out_free_session
;
1785 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1786 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1789 cs_slot
= &conf
->cl_cs_slot
;
1790 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1791 if (status
== nfserr_replay_cache
) {
1792 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1794 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1795 status
= nfserr_seq_misordered
;
1798 } else if (unconf
) {
1799 struct nfs4_client
*old
;
1800 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1801 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1802 status
= nfserr_clid_inuse
;
1805 cs_slot
= &unconf
->cl_cs_slot
;
1806 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1808 /* an unconfirmed replay returns misordered */
1809 status
= nfserr_seq_misordered
;
1812 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1815 move_to_confirmed(unconf
);
1818 status
= nfserr_stale_clientid
;
1823 * We do not support RDMA or persistent sessions
1825 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1826 cr_ses
->flags
&= ~SESSION4_RDMA
;
1828 init_session(rqstp
, new, conf
, cr_ses
);
1829 nfsd4_init_conn(rqstp
, conn
, new);
1831 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1832 NFS4_MAX_SESSIONID_LEN
);
1833 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1834 sizeof(struct nfsd4_channel_attrs
));
1835 cs_slot
->sl_seqid
++;
1836 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1838 /* cache solo and embedded create sessions under the state lock */
1839 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1840 nfs4_unlock_state();
1842 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1845 nfs4_unlock_state();
1848 __free_session(new);
1852 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1855 case NFS4_CDFC4_FORE
:
1856 case NFS4_CDFC4_BACK
:
1858 case NFS4_CDFC4_FORE_OR_BOTH
:
1859 case NFS4_CDFC4_BACK_OR_BOTH
:
1860 *dir
= NFS4_CDFC4_BOTH
;
1863 return nfserr_inval
;
1866 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1868 struct nfsd4_session
*session
= cstate
->session
;
1869 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1871 spin_lock(&nn
->client_lock
);
1872 session
->se_cb_prog
= bc
->bc_cb_program
;
1873 session
->se_cb_sec
= bc
->bc_cb_sec
;
1874 spin_unlock(&nn
->client_lock
);
1876 nfsd4_probe_callback(session
->se_client
);
1881 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1882 struct nfsd4_compound_state
*cstate
,
1883 struct nfsd4_bind_conn_to_session
*bcts
)
1886 struct nfsd4_conn
*conn
;
1887 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1889 if (!nfsd4_last_compound_op(rqstp
))
1890 return nfserr_not_only_op
;
1891 spin_lock(&nn
->client_lock
);
1892 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1893 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1894 * client_lock iself: */
1895 if (cstate
->session
) {
1896 nfsd4_get_session(cstate
->session
);
1897 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1899 spin_unlock(&nn
->client_lock
);
1900 if (!cstate
->session
)
1901 return nfserr_badsession
;
1903 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1906 conn
= alloc_conn(rqstp
, bcts
->dir
);
1908 return nfserr_jukebox
;
1909 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1913 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1917 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1921 nfsd4_destroy_session(struct svc_rqst
*r
,
1922 struct nfsd4_compound_state
*cstate
,
1923 struct nfsd4_destroy_session
*sessionid
)
1925 struct nfsd4_session
*ses
;
1926 __be32 status
= nfserr_badsession
;
1927 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
1930 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1931 * - Should we return nfserr_back_chan_busy if waiting for
1932 * callbacks on to-be-destroyed session?
1933 * - Do we need to clear any callback info from previous session?
1936 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1937 if (!nfsd4_last_compound_op(r
))
1938 return nfserr_not_only_op
;
1940 dump_sessionid(__func__
, &sessionid
->sessionid
);
1941 spin_lock(&nn
->client_lock
);
1942 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
1944 spin_unlock(&nn
->client_lock
);
1948 unhash_session(ses
);
1949 spin_unlock(&nn
->client_lock
);
1952 nfsd4_probe_callback_sync(ses
->se_client
);
1953 nfs4_unlock_state();
1955 spin_lock(&nn
->client_lock
);
1956 nfsd4_del_conns(ses
);
1957 nfsd4_put_session_locked(ses
);
1958 spin_unlock(&nn
->client_lock
);
1961 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1965 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1967 struct nfsd4_conn
*c
;
1969 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1970 if (c
->cn_xprt
== xpt
) {
1977 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1979 struct nfs4_client
*clp
= ses
->se_client
;
1980 struct nfsd4_conn
*c
;
1983 spin_lock(&clp
->cl_lock
);
1984 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1986 spin_unlock(&clp
->cl_lock
);
1990 __nfsd4_hash_conn(new, ses
);
1991 spin_unlock(&clp
->cl_lock
);
1992 ret
= nfsd4_register_conn(new);
1994 /* oops; xprt is already down: */
1995 nfsd4_conn_lost(&new->cn_xpt_user
);
1999 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2001 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2003 return args
->opcnt
> session
->se_fchannel
.maxops
;
2006 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2007 struct nfsd4_session
*session
)
2009 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2011 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2015 nfsd4_sequence(struct svc_rqst
*rqstp
,
2016 struct nfsd4_compound_state
*cstate
,
2017 struct nfsd4_sequence
*seq
)
2019 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2020 struct nfsd4_session
*session
;
2021 struct nfsd4_slot
*slot
;
2022 struct nfsd4_conn
*conn
;
2024 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2026 if (resp
->opcnt
!= 1)
2027 return nfserr_sequence_pos
;
2030 * Will be either used or freed by nfsd4_sequence_check_conn
2033 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2035 return nfserr_jukebox
;
2037 spin_lock(&nn
->client_lock
);
2038 status
= nfserr_badsession
;
2039 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2043 status
= nfserr_too_many_ops
;
2044 if (nfsd4_session_too_many_ops(rqstp
, session
))
2047 status
= nfserr_req_too_big
;
2048 if (nfsd4_request_too_big(rqstp
, session
))
2051 status
= nfserr_badslot
;
2052 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2055 slot
= session
->se_slots
[seq
->slotid
];
2056 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2058 /* We do not negotiate the number of slots yet, so set the
2059 * maxslots to the session maxreqs which is used to encode
2060 * sr_highest_slotid and the sr_target_slot id to maxslots */
2061 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2063 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2064 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2065 if (status
== nfserr_replay_cache
) {
2066 status
= nfserr_seq_misordered
;
2067 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2069 cstate
->slot
= slot
;
2070 cstate
->session
= session
;
2071 /* Return the cached reply status and set cstate->status
2072 * for nfsd4_proc_compound processing */
2073 status
= nfsd4_replay_cache_entry(resp
, seq
);
2074 cstate
->status
= nfserr_replay_cache
;
2080 nfsd4_sequence_check_conn(conn
, session
);
2083 /* Success! bump slot seqid */
2084 slot
->sl_seqid
= seq
->seqid
;
2085 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2087 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2089 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2091 cstate
->slot
= slot
;
2092 cstate
->session
= session
;
2095 /* Hold a session reference until done processing the compound. */
2096 if (cstate
->session
) {
2097 struct nfs4_client
*clp
= session
->se_client
;
2099 nfsd4_get_session(cstate
->session
);
2100 atomic_inc(&clp
->cl_refcount
);
2101 switch (clp
->cl_cb_state
) {
2103 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2105 case NFSD4_CB_FAULT
:
2106 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2109 seq
->status_flags
= 0;
2113 spin_unlock(&nn
->client_lock
);
2114 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2119 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2121 struct nfs4_client
*conf
, *unconf
, *clp
;
2123 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2126 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2127 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2132 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2133 status
= nfserr_clientid_busy
;
2137 /* rfc5661 18.50.3 */
2138 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2139 status
= nfserr_clientid_busy
;
2145 status
= nfserr_stale_clientid
;
2151 nfs4_unlock_state();
2152 dprintk("%s return %d\n", __func__
, ntohl(status
));
2157 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2161 if (rc
->rca_one_fs
) {
2162 if (!cstate
->current_fh
.fh_dentry
)
2163 return nfserr_nofilehandle
;
2165 * We don't take advantage of the rca_one_fs case.
2166 * That's OK, it's optional, we can safely ignore it.
2172 status
= nfserr_complete_already
;
2173 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2174 &cstate
->session
->se_client
->cl_flags
))
2177 status
= nfserr_stale_clientid
;
2178 if (is_client_expired(cstate
->session
->se_client
))
2180 * The following error isn't really legal.
2181 * But we only get here if the client just explicitly
2182 * destroyed the client. Surely it no longer cares what
2183 * error it gets back on an operation for the dead
2189 nfsd4_client_record_create(cstate
->session
->se_client
);
2191 nfs4_unlock_state();
2196 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2197 struct nfsd4_setclientid
*setclid
)
2199 struct xdr_netobj clname
= setclid
->se_name
;
2200 nfs4_verifier clverifier
= setclid
->se_verf
;
2201 struct nfs4_client
*conf
, *unconf
, *new;
2203 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2205 /* Cases below refer to rfc 3530 section 14.2.33: */
2207 conf
= find_confirmed_client_by_name(&clname
, nn
);
2210 status
= nfserr_clid_inuse
;
2211 if (clp_used_exchangeid(conf
))
2213 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2214 char addr_str
[INET6_ADDRSTRLEN
];
2215 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2217 dprintk("NFSD: setclientid: string in use by client "
2218 "at %s\n", addr_str
);
2222 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2224 expire_client(unconf
);
2225 status
= nfserr_jukebox
;
2226 new = create_client(clname
, rqstp
, &clverifier
);
2229 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2230 /* case 1: probable callback update */
2231 copy_clid(new, conf
);
2232 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2234 new->cl_minorversion
= 0;
2235 gen_callback(new, setclid
, rqstp
);
2236 add_to_unconfirmed(new);
2237 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2238 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2239 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2242 nfs4_unlock_state();
2248 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2249 struct nfsd4_compound_state
*cstate
,
2250 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2252 struct nfs4_client
*conf
, *unconf
;
2253 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2254 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2256 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2258 if (STALE_CLIENTID(clid
, nn
))
2259 return nfserr_stale_clientid
;
2262 conf
= find_confirmed_client(clid
, false, nn
);
2263 unconf
= find_unconfirmed_client(clid
, false, nn
);
2265 * We try hard to give out unique clientid's, so if we get an
2266 * attempt to confirm the same clientid with a different cred,
2267 * there's a bug somewhere. Let's charitably assume it's our
2270 status
= nfserr_serverfault
;
2271 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2273 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2275 /* cases below refer to rfc 3530 section 14.2.34: */
2276 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2277 if (conf
&& !unconf
) /* case 2: probable retransmit */
2279 else /* case 4: client hasn't noticed we rebooted yet? */
2280 status
= nfserr_stale_clientid
;
2284 if (conf
) { /* case 1: callback update */
2285 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2286 nfsd4_probe_callback(conf
);
2287 expire_client(unconf
);
2288 } else { /* case 3: normal case; new or rebooted client */
2289 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2291 expire_client(conf
);
2292 move_to_confirmed(unconf
);
2293 nfsd4_probe_callback(unconf
);
2296 nfs4_unlock_state();
2300 static struct nfs4_file
*nfsd4_alloc_file(void)
2302 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2305 /* OPEN Share state helper functions */
2306 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2308 unsigned int hashval
= file_hashval(ino
);
2310 atomic_set(&fp
->fi_ref
, 1);
2311 INIT_LIST_HEAD(&fp
->fi_hash
);
2312 INIT_LIST_HEAD(&fp
->fi_stateids
);
2313 INIT_LIST_HEAD(&fp
->fi_delegations
);
2314 fp
->fi_inode
= igrab(ino
);
2315 fp
->fi_had_conflict
= false;
2316 fp
->fi_lease
= NULL
;
2317 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2318 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2319 spin_lock(&recall_lock
);
2320 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2321 spin_unlock(&recall_lock
);
2325 nfsd4_free_slab(struct kmem_cache
**slab
)
2329 kmem_cache_destroy(*slab
);
2334 nfsd4_free_slabs(void)
2336 nfsd4_free_slab(&openowner_slab
);
2337 nfsd4_free_slab(&lockowner_slab
);
2338 nfsd4_free_slab(&file_slab
);
2339 nfsd4_free_slab(&stateid_slab
);
2340 nfsd4_free_slab(&deleg_slab
);
2344 nfsd4_init_slabs(void)
2346 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2347 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2348 if (openowner_slab
== NULL
)
2350 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2351 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2352 if (lockowner_slab
== NULL
)
2354 file_slab
= kmem_cache_create("nfsd4_files",
2355 sizeof(struct nfs4_file
), 0, 0, NULL
);
2356 if (file_slab
== NULL
)
2358 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2359 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2360 if (stateid_slab
== NULL
)
2362 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2363 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2364 if (deleg_slab
== NULL
)
2369 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2373 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2375 kfree(oo
->oo_owner
.so_owner
.data
);
2376 kmem_cache_free(openowner_slab
, oo
);
2379 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2381 kfree(lo
->lo_owner
.so_owner
.data
);
2382 kmem_cache_free(lockowner_slab
, lo
);
2385 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2387 rp
->rp_status
= nfserr_serverfault
;
2389 rp
->rp_buf
= rp
->rp_ibuf
;
2392 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2394 struct nfs4_stateowner
*sop
;
2396 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2400 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2401 if (!sop
->so_owner
.data
) {
2402 kmem_cache_free(slab
, sop
);
2405 sop
->so_owner
.len
= owner
->len
;
2407 INIT_LIST_HEAD(&sop
->so_stateids
);
2408 sop
->so_client
= clp
;
2409 init_nfs4_replay(&sop
->so_replay
);
2413 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2415 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2417 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2418 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2421 static struct nfs4_openowner
*
2422 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2423 struct nfs4_openowner
*oo
;
2425 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2428 oo
->oo_owner
.so_is_open_owner
= 1;
2429 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2430 oo
->oo_flags
= NFS4_OO_NEW
;
2432 oo
->oo_last_closed_stid
= NULL
;
2433 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2434 hash_openowner(oo
, clp
, strhashval
);
2438 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2439 struct nfs4_openowner
*oo
= open
->op_openowner
;
2441 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2442 INIT_LIST_HEAD(&stp
->st_lockowners
);
2443 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2444 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2445 stp
->st_stateowner
= &oo
->oo_owner
;
2448 stp
->st_access_bmap
= 0;
2449 stp
->st_deny_bmap
= 0;
2450 set_access(open
->op_share_access
, stp
);
2451 set_deny(open
->op_share_deny
, stp
);
2452 stp
->st_openstp
= NULL
;
2456 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2458 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2460 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2462 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2463 oo
->oo_time
= get_seconds();
2467 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2470 return (sop
->so_owner
.len
== owner
->len
) &&
2471 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2472 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2475 static struct nfs4_openowner
*
2476 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2477 bool sessions
, struct nfsd_net
*nn
)
2479 struct nfs4_stateowner
*so
;
2480 struct nfs4_openowner
*oo
;
2481 struct nfs4_client
*clp
;
2483 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2484 if (!so
->so_is_open_owner
)
2486 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2488 clp
= oo
->oo_owner
.so_client
;
2489 if ((bool)clp
->cl_minorversion
!= sessions
)
2491 renew_client(oo
->oo_owner
.so_client
);
2498 /* search file_hashtbl[] for file */
2499 static struct nfs4_file
*
2500 find_file(struct inode
*ino
)
2502 unsigned int hashval
= file_hashval(ino
);
2503 struct nfs4_file
*fp
;
2505 spin_lock(&recall_lock
);
2506 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2507 if (fp
->fi_inode
== ino
) {
2509 spin_unlock(&recall_lock
);
2513 spin_unlock(&recall_lock
);
2518 * Called to check deny when READ with all zero stateid or
2519 * WRITE with all zero or all one stateid
2522 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2524 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2525 struct nfs4_file
*fp
;
2526 struct nfs4_ol_stateid
*stp
;
2529 dprintk("NFSD: nfs4_share_conflict\n");
2531 fp
= find_file(ino
);
2534 ret
= nfserr_locked
;
2535 /* Search for conflicting share reservations */
2536 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2537 if (test_deny(deny_type
, stp
) ||
2538 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2547 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2549 /* We're assuming the state code never drops its reference
2550 * without first removing the lease. Since we're in this lease
2551 * callback (and since the lease code is serialized by the kernel
2552 * lock) we know the server hasn't removed the lease yet, we know
2553 * it's safe to take a reference: */
2554 atomic_inc(&dp
->dl_count
);
2556 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2558 /* only place dl_time is set. protected by lock_flocks*/
2559 dp
->dl_time
= get_seconds();
2561 nfsd4_cb_recall(dp
);
2564 /* Called from break_lease() with lock_flocks() held. */
2565 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2567 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2568 struct nfs4_delegation
*dp
;
2571 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2574 if (fp
->fi_had_conflict
) {
2575 WARN(1, "duplicate break on %p\n", fp
);
2579 * We don't want the locks code to timeout the lease for us;
2580 * we'll remove it ourself if a delegation isn't returned
2583 fl
->fl_break_time
= 0;
2585 spin_lock(&recall_lock
);
2586 fp
->fi_had_conflict
= true;
2587 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2588 nfsd_break_one_deleg(dp
);
2589 spin_unlock(&recall_lock
);
2593 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2596 return lease_modify(onlist
, arg
);
2601 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2602 .lm_break
= nfsd_break_deleg_cb
,
2603 .lm_change
= nfsd_change_deleg_cb
,
2606 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2608 if (nfsd4_has_session(cstate
))
2610 if (seqid
== so
->so_seqid
- 1)
2611 return nfserr_replay_me
;
2612 if (seqid
== so
->so_seqid
)
2614 return nfserr_bad_seqid
;
2618 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2619 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2621 clientid_t
*clientid
= &open
->op_clientid
;
2622 struct nfs4_client
*clp
= NULL
;
2623 unsigned int strhashval
;
2624 struct nfs4_openowner
*oo
= NULL
;
2627 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2628 return nfserr_stale_clientid
;
2630 * In case we need it later, after we've already created the
2631 * file and don't want to risk a further failure:
2633 open
->op_file
= nfsd4_alloc_file();
2634 if (open
->op_file
== NULL
)
2635 return nfserr_jukebox
;
2637 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2638 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2639 open
->op_openowner
= oo
;
2641 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2644 return nfserr_expired
;
2647 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2648 /* Replace unconfirmed owners without checking for replay. */
2649 clp
= oo
->oo_owner
.so_client
;
2650 release_openowner(oo
);
2651 open
->op_openowner
= NULL
;
2654 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2657 clp
= oo
->oo_owner
.so_client
;
2660 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2662 return nfserr_jukebox
;
2663 open
->op_openowner
= oo
;
2665 open
->op_stp
= nfs4_alloc_stateid(clp
);
2667 return nfserr_jukebox
;
2671 static inline __be32
2672 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2674 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2675 return nfserr_openmode
;
2680 static int share_access_to_flags(u32 share_access
)
2682 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2685 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2687 struct nfs4_stid
*ret
;
2689 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2692 return delegstateid(ret
);
2695 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2697 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2698 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2702 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2703 struct nfs4_delegation
**dp
)
2706 __be32 status
= nfserr_bad_stateid
;
2708 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2711 flags
= share_access_to_flags(open
->op_share_access
);
2712 status
= nfs4_check_delegmode(*dp
, flags
);
2716 if (!nfsd4_is_deleg_cur(open
))
2720 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2725 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2727 struct nfs4_ol_stateid
*local
;
2728 struct nfs4_openowner
*oo
= open
->op_openowner
;
2730 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2731 /* ignore lock owners */
2732 if (local
->st_stateowner
->so_is_open_owner
== 0)
2734 /* remember if we have seen this open owner */
2735 if (local
->st_stateowner
== &oo
->oo_owner
)
2737 /* check for conflicting share reservations */
2738 if (!test_share(local
, open
))
2739 return nfserr_share_denied
;
2744 static inline int nfs4_access_to_access(u32 nfs4_access
)
2748 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2749 flags
|= NFSD_MAY_READ
;
2750 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2751 flags
|= NFSD_MAY_WRITE
;
2755 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2756 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2759 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2760 int access
= nfs4_access_to_access(open
->op_share_access
);
2762 if (!fp
->fi_fds
[oflag
]) {
2763 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2764 &fp
->fi_fds
[oflag
]);
2768 nfs4_file_get_access(fp
, oflag
);
2773 static inline __be32
2774 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2775 struct nfsd4_open
*open
)
2777 struct iattr iattr
= {
2778 .ia_valid
= ATTR_SIZE
,
2781 if (!open
->op_truncate
)
2783 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2784 return nfserr_inval
;
2785 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2789 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
)
2791 u32 op_share_access
= open
->op_share_access
;
2795 new_access
= !test_access(op_share_access
, stp
);
2797 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2801 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2804 int oflag
= nfs4_access_to_omode(op_share_access
);
2805 nfs4_file_put_access(fp
, oflag
);
2809 /* remember the open */
2810 set_access(op_share_access
, stp
);
2811 set_deny(open
->op_share_deny
, stp
);
2818 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2820 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2823 /* Should we give out recallable state?: */
2824 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2826 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2829 * In the sessions case, since we don't have to establish a
2830 * separate connection for callbacks, we assume it's OK
2831 * until we hear otherwise:
2833 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2836 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2838 struct file_lock
*fl
;
2840 fl
= locks_alloc_lock();
2843 locks_init_lock(fl
);
2844 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2845 fl
->fl_flags
= FL_LEASE
;
2846 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2847 fl
->fl_end
= OFFSET_MAX
;
2848 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2849 fl
->fl_pid
= current
->tgid
;
2853 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2855 struct nfs4_file
*fp
= dp
->dl_file
;
2856 struct file_lock
*fl
;
2859 fl
= nfs4_alloc_init_lease(dp
, flag
);
2862 fl
->fl_file
= find_readable_file(fp
);
2863 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2864 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2866 list_del_init(&dp
->dl_perclnt
);
2867 locks_free_lock(fl
);
2871 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2872 atomic_set(&fp
->fi_delegees
, 1);
2873 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2877 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2879 struct nfs4_file
*fp
= dp
->dl_file
;
2882 return nfs4_setlease(dp
, flag
);
2883 spin_lock(&recall_lock
);
2884 if (fp
->fi_had_conflict
) {
2885 spin_unlock(&recall_lock
);
2888 atomic_inc(&fp
->fi_delegees
);
2889 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2890 spin_unlock(&recall_lock
);
2891 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2895 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2897 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2898 if (status
== -EAGAIN
)
2899 open
->op_why_no_deleg
= WND4_CONTENTION
;
2901 open
->op_why_no_deleg
= WND4_RESOURCE
;
2902 switch (open
->op_deleg_want
) {
2903 case NFS4_SHARE_WANT_READ_DELEG
:
2904 case NFS4_SHARE_WANT_WRITE_DELEG
:
2905 case NFS4_SHARE_WANT_ANY_DELEG
:
2907 case NFS4_SHARE_WANT_CANCEL
:
2908 open
->op_why_no_deleg
= WND4_CANCELLED
;
2910 case NFS4_SHARE_WANT_NO_DELEG
:
2917 * Attempt to hand out a delegation.
2920 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2921 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2923 struct nfs4_delegation
*dp
;
2924 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2926 int status
= 0, flag
= 0;
2928 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2929 flag
= NFS4_OPEN_DELEGATE_NONE
;
2930 open
->op_recall
= 0;
2931 switch (open
->op_claim_type
) {
2932 case NFS4_OPEN_CLAIM_PREVIOUS
:
2934 open
->op_recall
= 1;
2935 flag
= open
->op_delegate_type
;
2936 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2939 case NFS4_OPEN_CLAIM_NULL
:
2940 /* Let's not give out any delegations till everyone's
2941 * had the chance to reclaim theirs.... */
2942 if (locks_in_grace(net
))
2944 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2946 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2947 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2949 flag
= NFS4_OPEN_DELEGATE_READ
;
2955 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2958 status
= nfs4_set_delegation(dp
, flag
);
2962 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2964 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2965 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2967 open
->op_delegate_type
= flag
;
2968 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2969 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2970 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2971 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2973 /* 4.1 client asking for a delegation? */
2974 if (open
->op_deleg_want
)
2975 nfsd4_open_deleg_none_ext(open
, status
);
2979 unhash_stid(&dp
->dl_stid
);
2980 nfs4_put_delegation(dp
);
2982 flag
= NFS4_OPEN_DELEGATE_NONE
;
2986 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2987 struct nfs4_delegation
*dp
)
2989 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
2990 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2991 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2992 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
2993 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
2994 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2995 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2996 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
2998 /* Otherwise the client must be confused wanting a delegation
2999 * it already has, therefore we don't return
3000 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3005 * called with nfs4_lock_state() held.
3008 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3010 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3011 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3012 struct nfs4_file
*fp
= NULL
;
3013 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3014 struct nfs4_ol_stateid
*stp
= NULL
;
3015 struct nfs4_delegation
*dp
= NULL
;
3019 * Lookup file; if found, lookup stateid and check open request,
3020 * and check for delegations in the process of being recalled.
3021 * If not found, create the nfs4_file struct
3023 fp
= find_file(ino
);
3025 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3027 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3031 status
= nfserr_bad_stateid
;
3032 if (nfsd4_is_deleg_cur(open
))
3034 status
= nfserr_jukebox
;
3036 open
->op_file
= NULL
;
3037 nfsd4_init_file(fp
, ino
);
3041 * OPEN the file, or upgrade an existing OPEN.
3042 * If truncate fails, the OPEN fails.
3045 /* Stateid was found, this is an OPEN upgrade */
3046 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3050 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3053 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3057 open
->op_stp
= NULL
;
3058 init_open_stateid(stp
, fp
, open
);
3060 update_stateid(&stp
->st_stid
.sc_stateid
);
3061 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3063 if (nfsd4_has_session(&resp
->cstate
)) {
3064 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3066 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3067 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3068 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3074 * Attempt to hand out a delegation. No error return, because the
3075 * OPEN succeeds even if we fail.
3077 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3081 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3082 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3084 /* 4.1 client trying to upgrade/downgrade delegation? */
3085 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3086 open
->op_deleg_want
)
3087 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3091 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3092 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3094 * To finish the open response, we just need to set the rflags.
3096 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3097 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3098 !nfsd4_has_session(&resp
->cstate
))
3099 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3104 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3106 if (open
->op_openowner
) {
3107 struct nfs4_openowner
*oo
= open
->op_openowner
;
3109 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3110 list_del_init(&oo
->oo_close_lru
);
3111 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3113 release_openowner(oo
);
3114 open
->op_openowner
= NULL
;
3116 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3120 nfsd4_free_file(open
->op_file
);
3122 free_generic_stateid(open
->op_stp
);
3125 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3127 struct nfs4_client
*found
;
3129 if (STALE_CLIENTID(clid
, nn
))
3130 return nfserr_stale_clientid
;
3131 found
= find_confirmed_client(clid
, session
, nn
);
3134 return found
? nfs_ok
: nfserr_expired
;
3138 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3141 struct nfs4_client
*clp
;
3143 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3146 dprintk("process_renew(%08x/%08x): starting\n",
3147 clid
->cl_boot
, clid
->cl_id
);
3148 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3151 status
= nfserr_cb_path_down
;
3152 if (!list_empty(&clp
->cl_delegations
)
3153 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3157 nfs4_unlock_state();
3162 nfsd4_end_grace(struct nfsd_net
*nn
)
3164 /* do nothing if grace period already ended */
3165 if (nn
->grace_ended
)
3168 dprintk("NFSD: end of grace period\n");
3169 nn
->grace_ended
= true;
3170 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3171 locks_end_grace(&nn
->nfsd4_manager
);
3173 * Now that every NFSv4 client has had the chance to recover and
3174 * to see the (possibly new, possibly shorter) lease time, we
3175 * can safely set the next grace time to the current lease time:
3177 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3181 nfs4_laundromat(struct nfsd_net
*nn
)
3183 struct nfs4_client
*clp
;
3184 struct nfs4_openowner
*oo
;
3185 struct nfs4_delegation
*dp
;
3186 struct list_head
*pos
, *next
, reaplist
;
3187 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3188 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3189 time_t u
, test_val
= nn
->nfsd4_lease
;
3193 dprintk("NFSD: laundromat service - starting\n");
3194 nfsd4_end_grace(nn
);
3195 INIT_LIST_HEAD(&reaplist
);
3196 spin_lock(&nn
->client_lock
);
3197 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3198 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3199 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3200 t
= clp
->cl_time
- cutoff
;
3201 if (clientid_val
> t
)
3205 if (atomic_read(&clp
->cl_refcount
)) {
3206 dprintk("NFSD: client in use (clientid %08x)\n",
3207 clp
->cl_clientid
.cl_id
);
3210 unhash_client_locked(clp
);
3211 list_add(&clp
->cl_lru
, &reaplist
);
3213 spin_unlock(&nn
->client_lock
);
3214 list_for_each_safe(pos
, next
, &reaplist
) {
3215 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3216 dprintk("NFSD: purging unused client (clientid %08x)\n",
3217 clp
->cl_clientid
.cl_id
);
3220 spin_lock(&recall_lock
);
3221 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3222 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3223 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3225 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3226 u
= dp
->dl_time
- cutoff
;
3231 list_move(&dp
->dl_recall_lru
, &reaplist
);
3233 spin_unlock(&recall_lock
);
3234 list_for_each_safe(pos
, next
, &reaplist
) {
3235 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3236 unhash_delegation(dp
);
3238 test_val
= nn
->nfsd4_lease
;
3239 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3240 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3241 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3242 u
= oo
->oo_time
- cutoff
;
3247 release_openowner(oo
);
3249 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3250 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3251 nfs4_unlock_state();
3252 return clientid_val
;
3255 static struct workqueue_struct
*laundry_wq
;
3256 static void laundromat_main(struct work_struct
*);
3259 laundromat_main(struct work_struct
*laundry
)
3262 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3264 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3267 t
= nfs4_laundromat(nn
);
3268 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3269 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3272 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3274 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3275 return nfserr_bad_stateid
;
3280 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3282 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3284 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3285 STATEID_VAL(stateid
));
3290 access_permit_read(struct nfs4_ol_stateid
*stp
)
3292 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3293 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3294 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3298 access_permit_write(struct nfs4_ol_stateid
*stp
)
3300 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3301 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3305 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3307 __be32 status
= nfserr_openmode
;
3309 /* For lock stateid's, we test the parent open, not the lock: */
3310 if (stp
->st_openstp
)
3311 stp
= stp
->st_openstp
;
3312 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3314 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3321 static inline __be32
3322 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3324 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3326 else if (locks_in_grace(net
)) {
3327 /* Answer in remaining cases depends on existence of
3328 * conflicting state; so we must wait out the grace period. */
3329 return nfserr_grace
;
3330 } else if (flags
& WR_STATE
)
3331 return nfs4_share_conflict(current_fh
,
3332 NFS4_SHARE_DENY_WRITE
);
3333 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3334 return nfs4_share_conflict(current_fh
,
3335 NFS4_SHARE_DENY_READ
);
3339 * Allow READ/WRITE during grace period on recovered state only for files
3340 * that are not able to provide mandatory locking.
3343 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3345 return locks_in_grace(net
) && mandatory_lock(inode
);
3348 /* Returns true iff a is later than b: */
3349 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3351 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3354 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3357 * When sessions are used the stateid generation number is ignored
3360 if (has_session
&& in
->si_generation
== 0)
3363 if (in
->si_generation
== ref
->si_generation
)
3366 /* If the client sends us a stateid from the future, it's buggy: */
3367 if (stateid_generation_after(in
, ref
))
3368 return nfserr_bad_stateid
;
3370 * However, we could see a stateid from the past, even from a
3371 * non-buggy client. For example, if the client sends a lock
3372 * while some IO is outstanding, the lock may bump si_generation
3373 * while the IO is still in flight. The client could avoid that
3374 * situation by waiting for responses on all the IO requests,
3375 * but better performance may result in retrying IO that
3376 * receives an old_stateid error if requests are rarely
3377 * reordered in flight:
3379 return nfserr_old_stateid
;
3382 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3384 struct nfs4_stid
*s
;
3385 struct nfs4_ol_stateid
*ols
;
3388 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3389 return nfserr_bad_stateid
;
3390 /* Client debugging aid. */
3391 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3392 char addr_str
[INET6_ADDRSTRLEN
];
3393 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3395 pr_warn_ratelimited("NFSD: client %s testing state ID "
3396 "with incorrect client ID\n", addr_str
);
3397 return nfserr_bad_stateid
;
3399 s
= find_stateid(cl
, stateid
);
3401 return nfserr_bad_stateid
;
3402 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3405 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3407 ols
= openlockstateid(s
);
3408 if (ols
->st_stateowner
->so_is_open_owner
3409 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3410 return nfserr_bad_stateid
;
3414 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3415 struct nfs4_stid
**s
, bool sessions
,
3416 struct nfsd_net
*nn
)
3418 struct nfs4_client
*cl
;
3420 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3421 return nfserr_bad_stateid
;
3422 if (STALE_STATEID(stateid
, nn
))
3423 return nfserr_stale_stateid
;
3424 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
, sessions
, nn
);
3426 return nfserr_expired
;
3427 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3429 return nfserr_bad_stateid
;
3435 * Checks for stateid operations
3438 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3439 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3441 struct nfs4_stid
*s
;
3442 struct nfs4_ol_stateid
*stp
= NULL
;
3443 struct nfs4_delegation
*dp
= NULL
;
3444 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3445 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3446 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3452 if (grace_disallows_io(net
, ino
))
3453 return nfserr_grace
;
3455 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3456 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3458 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3459 &s
, cstate
->minorversion
, nn
);
3462 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3465 switch (s
->sc_type
) {
3466 case NFS4_DELEG_STID
:
3467 dp
= delegstateid(s
);
3468 status
= nfs4_check_delegmode(dp
, flags
);
3472 *filpp
= dp
->dl_file
->fi_deleg_file
;
3475 status
= nfserr_serverfault
;
3480 case NFS4_OPEN_STID
:
3481 case NFS4_LOCK_STID
:
3482 stp
= openlockstateid(s
);
3483 status
= nfs4_check_fh(current_fh
, stp
);
3486 if (stp
->st_stateowner
->so_is_open_owner
3487 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3489 status
= nfs4_check_openmode(stp
, flags
);
3493 if (flags
& RD_STATE
)
3494 *filpp
= find_readable_file(stp
->st_file
);
3496 *filpp
= find_writeable_file(stp
->st_file
);
3500 return nfserr_bad_stateid
;
3508 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3510 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3511 return nfserr_locks_held
;
3512 release_lock_stateid(stp
);
3517 * Test if the stateid is valid
3520 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3521 struct nfsd4_test_stateid
*test_stateid
)
3523 struct nfsd4_test_stateid_id
*stateid
;
3524 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3527 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3528 stateid
->ts_id_status
=
3529 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3530 nfs4_unlock_state();
3536 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3537 struct nfsd4_free_stateid
*free_stateid
)
3539 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3540 struct nfs4_stid
*s
;
3541 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3542 __be32 ret
= nfserr_bad_stateid
;
3545 s
= find_stateid(cl
, stateid
);
3548 switch (s
->sc_type
) {
3549 case NFS4_DELEG_STID
:
3550 ret
= nfserr_locks_held
;
3552 case NFS4_OPEN_STID
:
3553 case NFS4_LOCK_STID
:
3554 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3557 if (s
->sc_type
== NFS4_LOCK_STID
)
3558 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3560 ret
= nfserr_locks_held
;
3563 ret
= nfserr_bad_stateid
;
3566 nfs4_unlock_state();
3573 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3574 RD_STATE
: WR_STATE
;
3577 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3579 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3580 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3583 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3586 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3588 * "Closed" stateid's exist *only* to return
3589 * nfserr_replay_me from the previous step.
3591 return nfserr_bad_stateid
;
3592 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3595 return nfs4_check_fh(current_fh
, stp
);
3599 * Checks for sequence id mutating operations.
3602 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3603 stateid_t
*stateid
, char typemask
,
3604 struct nfs4_ol_stateid
**stpp
,
3605 struct nfsd_net
*nn
)
3608 struct nfs4_stid
*s
;
3610 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3611 seqid
, STATEID_VAL(stateid
));
3614 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3615 cstate
->minorversion
, nn
);
3618 *stpp
= openlockstateid(s
);
3619 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3621 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3624 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3625 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3628 struct nfs4_openowner
*oo
;
3630 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3631 NFS4_OPEN_STID
, stpp
, nn
);
3634 oo
= openowner((*stpp
)->st_stateowner
);
3635 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3636 return nfserr_bad_stateid
;
3641 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3642 struct nfsd4_open_confirm
*oc
)
3645 struct nfs4_openowner
*oo
;
3646 struct nfs4_ol_stateid
*stp
;
3647 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3649 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3650 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3651 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3653 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3659 status
= nfs4_preprocess_seqid_op(cstate
,
3660 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3661 NFS4_OPEN_STID
, &stp
, nn
);
3664 oo
= openowner(stp
->st_stateowner
);
3665 status
= nfserr_bad_stateid
;
3666 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3668 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3669 update_stateid(&stp
->st_stid
.sc_stateid
);
3670 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3671 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3672 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3674 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3677 if (!cstate
->replay_owner
)
3678 nfs4_unlock_state();
3682 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3684 if (!test_access(access
, stp
))
3686 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3687 clear_access(access
, stp
);
3690 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3692 switch (to_access
) {
3693 case NFS4_SHARE_ACCESS_READ
:
3694 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3695 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3697 case NFS4_SHARE_ACCESS_WRITE
:
3698 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3699 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3701 case NFS4_SHARE_ACCESS_BOTH
:
3709 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3712 for (i
= 0; i
< 4; i
++) {
3713 if ((i
& deny
) != i
)
3719 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3720 struct nfsd4_compound_state
*cstate
,
3721 struct nfsd4_open_downgrade
*od
)
3724 struct nfs4_ol_stateid
*stp
;
3725 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3727 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3728 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3729 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3731 /* We don't yet support WANT bits: */
3732 if (od
->od_deleg_want
)
3733 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3737 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3738 &od
->od_stateid
, &stp
, nn
);
3741 status
= nfserr_inval
;
3742 if (!test_access(od
->od_share_access
, stp
)) {
3743 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3744 stp
->st_access_bmap
, od
->od_share_access
);
3747 if (!test_deny(od
->od_share_deny
, stp
)) {
3748 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3749 stp
->st_deny_bmap
, od
->od_share_deny
);
3752 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3754 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3756 update_stateid(&stp
->st_stid
.sc_stateid
);
3757 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3760 if (!cstate
->replay_owner
)
3761 nfs4_unlock_state();
3765 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3767 struct nfs4_openowner
*oo
;
3768 struct nfs4_ol_stateid
*s
;
3770 if (!so
->so_is_open_owner
)
3773 s
= oo
->oo_last_closed_stid
;
3776 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3777 /* Release the last_closed_stid on the next seqid bump: */
3778 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3781 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3782 release_last_closed_stateid(oo
);
3785 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3787 unhash_open_stateid(s
);
3788 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3792 * nfs4_unlock_state() called after encode
3795 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3796 struct nfsd4_close
*close
)
3799 struct nfs4_openowner
*oo
;
3800 struct nfs4_ol_stateid
*stp
;
3801 struct net
*net
= SVC_NET(rqstp
);
3802 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3804 dprintk("NFSD: nfsd4_close on file %.*s\n",
3805 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3806 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3809 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3811 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3815 oo
= openowner(stp
->st_stateowner
);
3817 update_stateid(&stp
->st_stid
.sc_stateid
);
3818 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3820 nfsd4_close_open_stateid(stp
);
3821 release_last_closed_stateid(oo
);
3822 oo
->oo_last_closed_stid
= stp
;
3824 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3825 if (cstate
->minorversion
) {
3826 release_openowner(oo
);
3827 cstate
->replay_owner
= NULL
;
3830 * In the 4.0 case we need to keep the owners around a
3831 * little while to handle CLOSE replay.
3833 if (list_empty(&oo
->oo_owner
.so_stateids
))
3834 move_to_close_lru(oo
, SVC_NET(rqstp
));
3838 if (!cstate
->replay_owner
)
3839 nfs4_unlock_state();
3844 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3845 struct nfsd4_delegreturn
*dr
)
3847 struct nfs4_delegation
*dp
;
3848 stateid_t
*stateid
= &dr
->dr_stateid
;
3849 struct nfs4_stid
*s
;
3851 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3853 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3857 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3858 cstate
->minorversion
, nn
);
3861 dp
= delegstateid(s
);
3862 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3866 unhash_delegation(dp
);
3868 nfs4_unlock_state();
3874 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3876 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3879 end_offset(u64 start
, u64 len
)
3884 return end
>= start
? end
: NFS4_MAX_UINT64
;
3887 /* last octet in a range */
3889 last_byte_offset(u64 start
, u64 len
)
3895 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3898 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3900 return (file_hashval(inode
) + cl_id
3901 + opaque_hashval(ownername
->data
, ownername
->len
))
3902 & LOCKOWNER_INO_HASH_MASK
;
3906 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3907 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3908 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3909 * locking, this prevents us from being completely protocol-compliant. The
3910 * real solution to this problem is to start using unsigned file offsets in
3911 * the VFS, but this is a very deep change!
3914 nfs4_transform_lock_offset(struct file_lock
*lock
)
3916 if (lock
->fl_start
< 0)
3917 lock
->fl_start
= OFFSET_MAX
;
3918 if (lock
->fl_end
< 0)
3919 lock
->fl_end
= OFFSET_MAX
;
3922 /* Hack!: For now, we're defining this just so we can use a pointer to it
3923 * as a unique cookie to identify our (NFSv4's) posix locks. */
3924 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3928 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3930 struct nfs4_lockowner
*lo
;
3932 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3933 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3934 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3935 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3936 if (!deny
->ld_owner
.data
)
3937 /* We just don't care that much */
3939 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3940 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3943 deny
->ld_owner
.len
= 0;
3944 deny
->ld_owner
.data
= NULL
;
3945 deny
->ld_clientid
.cl_boot
= 0;
3946 deny
->ld_clientid
.cl_id
= 0;
3948 deny
->ld_start
= fl
->fl_start
;
3949 deny
->ld_length
= NFS4_MAX_UINT64
;
3950 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3951 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3952 deny
->ld_type
= NFS4_READ_LT
;
3953 if (fl
->fl_type
!= F_RDLCK
)
3954 deny
->ld_type
= NFS4_WRITE_LT
;
3957 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3959 struct nfs4_ol_stateid
*lst
;
3961 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3963 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3964 struct nfs4_ol_stateid
, st_perstateowner
);
3965 return lst
->st_file
->fi_inode
== inode
;
3968 static struct nfs4_lockowner
*
3969 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3970 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
3972 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3973 struct nfs4_lockowner
*lo
;
3975 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3976 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3982 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3984 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3985 unsigned int inohash
= lockowner_ino_hashval(inode
,
3986 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3987 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
3989 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
3990 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
3991 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3995 * Alloc a lock owner structure.
3996 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3999 * strhashval = ownerstr_hashval
4002 static struct nfs4_lockowner
*
4003 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4004 struct nfs4_lockowner
*lo
;
4006 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4009 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4010 lo
->lo_owner
.so_is_open_owner
= 0;
4011 /* It is the openowner seqid that will be incremented in encode in the
4012 * case of new lockowners; so increment the lock seqid manually: */
4013 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4014 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4018 static struct nfs4_ol_stateid
*
4019 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4021 struct nfs4_ol_stateid
*stp
;
4022 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4024 stp
= nfs4_alloc_stateid(clp
);
4027 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
4028 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4029 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4030 stp
->st_stateowner
= &lo
->lo_owner
;
4033 stp
->st_access_bmap
= 0;
4034 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4035 stp
->st_openstp
= open_stp
;
4040 check_lock_length(u64 offset
, u64 length
)
4042 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4043 LOFF_OVERFLOW(offset
, length
)));
4046 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4048 struct nfs4_file
*fp
= lock_stp
->st_file
;
4049 int oflag
= nfs4_access_to_omode(access
);
4051 if (test_access(access
, lock_stp
))
4053 nfs4_file_get_access(fp
, oflag
);
4054 set_access(access
, lock_stp
);
4057 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)
4059 struct nfs4_file
*fi
= ost
->st_file
;
4060 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4061 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4062 struct nfs4_lockowner
*lo
;
4063 unsigned int strhashval
;
4064 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4066 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4067 &lock
->v
.new.owner
, nn
);
4069 if (!cstate
->minorversion
)
4070 return nfserr_bad_seqid
;
4071 /* XXX: a lockowner always has exactly one stateid: */
4072 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4073 struct nfs4_ol_stateid
, st_perstateowner
);
4076 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4077 &lock
->v
.new.owner
);
4078 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4080 return nfserr_jukebox
;
4081 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4083 release_lockowner(lo
);
4084 return nfserr_jukebox
;
4094 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4095 struct nfsd4_lock
*lock
)
4097 struct nfs4_openowner
*open_sop
= NULL
;
4098 struct nfs4_lockowner
*lock_sop
= NULL
;
4099 struct nfs4_ol_stateid
*lock_stp
;
4100 struct file
*filp
= NULL
;
4101 struct file_lock
*file_lock
= NULL
;
4102 struct file_lock
*conflock
= NULL
;
4104 bool new_state
= false;
4107 struct net
*net
= SVC_NET(rqstp
);
4108 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4110 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4111 (long long) lock
->lk_offset
,
4112 (long long) lock
->lk_length
);
4114 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4115 return nfserr_inval
;
4117 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4118 S_IFREG
, NFSD_MAY_LOCK
))) {
4119 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4125 if (lock
->lk_is_new
) {
4126 struct nfs4_ol_stateid
*open_stp
= NULL
;
4128 if (nfsd4_has_session(cstate
))
4129 /* See rfc 5661 18.10.3: given clientid is ignored: */
4130 memcpy(&lock
->v
.new.clientid
,
4131 &cstate
->session
->se_client
->cl_clientid
,
4132 sizeof(clientid_t
));
4134 status
= nfserr_stale_clientid
;
4135 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4138 /* validate and update open stateid and open seqid */
4139 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4140 lock
->lk_new_open_seqid
,
4141 &lock
->lk_new_open_stateid
,
4145 open_sop
= openowner(open_stp
->st_stateowner
);
4146 status
= nfserr_bad_stateid
;
4147 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4148 &lock
->v
.new.clientid
))
4150 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4151 &lock_stp
, &new_state
);
4153 status
= nfs4_preprocess_seqid_op(cstate
,
4154 lock
->lk_old_lock_seqid
,
4155 &lock
->lk_old_lock_stateid
,
4156 NFS4_LOCK_STID
, &lock_stp
, nn
);
4159 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4161 lkflg
= setlkflg(lock
->lk_type
);
4162 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4166 status
= nfserr_grace
;
4167 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4169 status
= nfserr_no_grace
;
4170 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4173 file_lock
= locks_alloc_lock();
4175 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4176 status
= nfserr_jukebox
;
4180 locks_init_lock(file_lock
);
4181 switch (lock
->lk_type
) {
4184 filp
= find_readable_file(lock_stp
->st_file
);
4186 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4187 file_lock
->fl_type
= F_RDLCK
;
4190 case NFS4_WRITEW_LT
:
4191 filp
= find_writeable_file(lock_stp
->st_file
);
4193 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4194 file_lock
->fl_type
= F_WRLCK
;
4197 status
= nfserr_inval
;
4201 status
= nfserr_openmode
;
4204 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4205 file_lock
->fl_pid
= current
->tgid
;
4206 file_lock
->fl_file
= filp
;
4207 file_lock
->fl_flags
= FL_POSIX
;
4208 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4209 file_lock
->fl_start
= lock
->lk_offset
;
4210 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4211 nfs4_transform_lock_offset(file_lock
);
4213 conflock
= locks_alloc_lock();
4215 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4216 status
= nfserr_jukebox
;
4220 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4222 case 0: /* success! */
4223 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4224 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4228 case (EAGAIN
): /* conflock holds conflicting lock */
4229 status
= nfserr_denied
;
4230 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4231 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4234 status
= nfserr_deadlock
;
4237 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4238 status
= nfserrno(err
);
4242 if (status
&& new_state
)
4243 release_lockowner(lock_sop
);
4244 if (!cstate
->replay_owner
)
4245 nfs4_unlock_state();
4247 locks_free_lock(file_lock
);
4249 locks_free_lock(conflock
);
4254 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4255 * so we do a temporary open here just to get an open file to pass to
4256 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4259 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4262 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4264 err
= nfserrno(vfs_test_lock(file
, lock
));
4274 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4275 struct nfsd4_lockt
*lockt
)
4277 struct inode
*inode
;
4278 struct file_lock
*file_lock
= NULL
;
4279 struct nfs4_lockowner
*lo
;
4281 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4283 if (locks_in_grace(SVC_NET(rqstp
)))
4284 return nfserr_grace
;
4286 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4287 return nfserr_inval
;
4291 if (!nfsd4_has_session(cstate
)) {
4292 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4297 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4300 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4301 file_lock
= locks_alloc_lock();
4303 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4304 status
= nfserr_jukebox
;
4307 locks_init_lock(file_lock
);
4308 switch (lockt
->lt_type
) {
4311 file_lock
->fl_type
= F_RDLCK
;
4314 case NFS4_WRITEW_LT
:
4315 file_lock
->fl_type
= F_WRLCK
;
4318 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4319 status
= nfserr_inval
;
4323 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4325 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4326 file_lock
->fl_pid
= current
->tgid
;
4327 file_lock
->fl_flags
= FL_POSIX
;
4329 file_lock
->fl_start
= lockt
->lt_offset
;
4330 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4332 nfs4_transform_lock_offset(file_lock
);
4334 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4338 if (file_lock
->fl_type
!= F_UNLCK
) {
4339 status
= nfserr_denied
;
4340 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4343 nfs4_unlock_state();
4345 locks_free_lock(file_lock
);
4350 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4351 struct nfsd4_locku
*locku
)
4353 struct nfs4_ol_stateid
*stp
;
4354 struct file
*filp
= NULL
;
4355 struct file_lock
*file_lock
= NULL
;
4358 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4360 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4361 (long long) locku
->lu_offset
,
4362 (long long) locku
->lu_length
);
4364 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4365 return nfserr_inval
;
4369 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4370 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4374 filp
= find_any_file(stp
->st_file
);
4376 status
= nfserr_lock_range
;
4379 file_lock
= locks_alloc_lock();
4381 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4382 status
= nfserr_jukebox
;
4385 locks_init_lock(file_lock
);
4386 file_lock
->fl_type
= F_UNLCK
;
4387 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4388 file_lock
->fl_pid
= current
->tgid
;
4389 file_lock
->fl_file
= filp
;
4390 file_lock
->fl_flags
= FL_POSIX
;
4391 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4392 file_lock
->fl_start
= locku
->lu_offset
;
4394 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4396 nfs4_transform_lock_offset(file_lock
);
4399 * Try to unlock the file in the VFS.
4401 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4403 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4407 * OK, unlock succeeded; the only thing left to do is update the stateid.
4409 update_stateid(&stp
->st_stid
.sc_stateid
);
4410 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4413 if (!cstate
->replay_owner
)
4414 nfs4_unlock_state();
4416 locks_free_lock(file_lock
);
4420 status
= nfserrno(err
);
4426 * 1: locks held by lockowner
4427 * 0: no locks held by lockowner
4430 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4432 struct file_lock
**flpp
;
4433 struct inode
*inode
= filp
->fi_inode
;
4437 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4438 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4449 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4450 struct nfsd4_compound_state
*cstate
,
4451 struct nfsd4_release_lockowner
*rlockowner
)
4453 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4454 struct nfs4_stateowner
*sop
;
4455 struct nfs4_lockowner
*lo
;
4456 struct nfs4_ol_stateid
*stp
;
4457 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4458 struct list_head matches
;
4459 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4461 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4463 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4464 clid
->cl_boot
, clid
->cl_id
);
4468 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4472 status
= nfserr_locks_held
;
4473 INIT_LIST_HEAD(&matches
);
4475 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4476 if (sop
->so_is_open_owner
)
4478 if (!same_owner_str(sop
, owner
, clid
))
4480 list_for_each_entry(stp
, &sop
->so_stateids
,
4482 lo
= lockowner(sop
);
4483 if (check_for_locks(stp
->st_file
, lo
))
4485 list_add(&lo
->lo_list
, &matches
);
4488 /* Clients probably won't expect us to return with some (but not all)
4489 * of the lockowner state released; so don't release any until all
4490 * have been checked. */
4492 while (!list_empty(&matches
)) {
4493 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4495 /* unhash_stateowner deletes so_perclient only
4496 * for openowners. */
4497 list_del(&lo
->lo_list
);
4498 release_lockowner(lo
);
4501 nfs4_unlock_state();
4505 static inline struct nfs4_client_reclaim
*
4508 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4512 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4514 struct nfs4_client_reclaim
*crp
;
4516 crp
= nfsd4_find_reclaim_client(name
, nn
);
4517 return (crp
&& crp
->cr_clp
);
4521 * failure => all reset bets are off, nfserr_no_grace...
4523 struct nfs4_client_reclaim
*
4524 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4526 unsigned int strhashval
;
4527 struct nfs4_client_reclaim
*crp
;
4529 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4530 crp
= alloc_reclaim();
4532 strhashval
= clientstr_hashval(name
);
4533 INIT_LIST_HEAD(&crp
->cr_strhash
);
4534 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4535 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4537 nn
->reclaim_str_hashtbl_size
++;
4543 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4545 list_del(&crp
->cr_strhash
);
4547 nn
->reclaim_str_hashtbl_size
--;
4551 nfs4_release_reclaim(struct nfsd_net
*nn
)
4553 struct nfs4_client_reclaim
*crp
= NULL
;
4556 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4557 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4558 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4559 struct nfs4_client_reclaim
, cr_strhash
);
4560 nfs4_remove_reclaim_record(crp
, nn
);
4563 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4567 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4568 struct nfs4_client_reclaim
*
4569 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4571 unsigned int strhashval
;
4572 struct nfs4_client_reclaim
*crp
= NULL
;
4574 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4576 strhashval
= clientstr_hashval(recdir
);
4577 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4578 if (same_name(crp
->cr_recdir
, recdir
)) {
4586 * Called from OPEN. Look for clientid in reclaim list.
4589 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4591 struct nfs4_client
*clp
;
4593 /* find clientid in conf_id_hashtbl */
4594 clp
= find_confirmed_client(clid
, sessions
, nn
);
4596 return nfserr_reclaim_bad
;
4598 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4601 #ifdef CONFIG_NFSD_FAULT_INJECTION
4603 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4609 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4611 char buf
[INET6_ADDRSTRLEN
];
4612 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4613 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4617 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4620 char buf
[INET6_ADDRSTRLEN
];
4621 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, sizeof(buf
));
4622 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4625 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4627 struct nfs4_openowner
*oop
;
4628 struct nfs4_lockowner
*lop
, *lo_next
;
4629 struct nfs4_ol_stateid
*stp
, *st_next
;
4632 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4633 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4634 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4646 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4648 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4651 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4653 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4654 nfsd_print_count(clp
, count
, "locked files");
4658 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4660 struct nfs4_openowner
*oop
, *next
;
4663 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4673 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4675 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4678 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4680 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4681 nfsd_print_count(clp
, count
, "open files");
4685 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4686 struct list_head
*victims
)
4688 struct nfs4_delegation
*dp
, *next
;
4691 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4693 list_move(&dp
->dl_recall_lru
, victims
);
4700 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4702 struct nfs4_delegation
*dp
, *next
;
4706 spin_lock(&recall_lock
);
4707 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4708 spin_unlock(&recall_lock
);
4710 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4711 unhash_delegation(dp
);
4716 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4718 struct nfs4_delegation
*dp
, *next
;
4722 spin_lock(&recall_lock
);
4723 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4724 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4725 nfsd_break_one_deleg(dp
);
4726 spin_unlock(&recall_lock
);
4731 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4735 spin_lock(&recall_lock
);
4736 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4737 spin_unlock(&recall_lock
);
4739 nfsd_print_count(clp
, count
, "delegations");
4743 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4745 struct nfs4_client
*clp
, *next
;
4747 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4749 if (!nfsd_netns_ready(nn
))
4752 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4753 count
+= func(clp
, max
- count
);
4754 if ((max
!= 0) && (count
>= max
))
4761 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4763 struct nfs4_client
*clp
;
4764 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4766 if (!nfsd_netns_ready(nn
))
4769 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4770 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4776 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4778 /* initialization to perform at module load time: */
4781 nfs4_state_init(void)
4785 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4786 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4788 INIT_LIST_HEAD(&del_recall_lru
);
4792 * Since the lifetime of a delegation isn't limited to that of an open, a
4793 * client may quite reasonably hang on to a delegation as long as it has
4794 * the inode cached. This becomes an obvious problem the first time a
4795 * client's inode cache approaches the size of the server's total memory.
4797 * For now we avoid this problem by imposing a hard limit on the number
4798 * of delegations, which varies according to the server's memory size.
4801 set_max_delegations(void)
4804 * Allow at most 4 delegations per megabyte of RAM. Quick
4805 * estimates suggest that in the worst case (where every delegation
4806 * is for a different inode), a delegation could take about 1.5K,
4807 * giving a worst case usage of about 6% of memory.
4809 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4812 static int nfs4_state_create_net(struct net
*net
)
4814 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4817 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4818 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4819 if (!nn
->conf_id_hashtbl
)
4821 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4822 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4823 if (!nn
->unconf_id_hashtbl
)
4825 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4826 OWNER_HASH_SIZE
, GFP_KERNEL
);
4827 if (!nn
->ownerstr_hashtbl
)
4829 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4830 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4831 if (!nn
->lockowner_ino_hashtbl
)
4832 goto err_lockowner_ino
;
4833 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4834 SESSION_HASH_SIZE
, GFP_KERNEL
);
4835 if (!nn
->sessionid_hashtbl
)
4838 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4839 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4840 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4842 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4843 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4844 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4845 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4846 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4847 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4848 nn
->conf_name_tree
= RB_ROOT
;
4849 nn
->unconf_name_tree
= RB_ROOT
;
4850 INIT_LIST_HEAD(&nn
->client_lru
);
4851 INIT_LIST_HEAD(&nn
->close_lru
);
4852 spin_lock_init(&nn
->client_lock
);
4854 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4860 kfree(nn
->lockowner_ino_hashtbl
);
4862 kfree(nn
->ownerstr_hashtbl
);
4864 kfree(nn
->unconf_id_hashtbl
);
4866 kfree(nn
->conf_id_hashtbl
);
4872 nfs4_state_destroy_net(struct net
*net
)
4875 struct nfs4_client
*clp
= NULL
;
4876 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4877 struct rb_node
*node
, *tmp
;
4879 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4880 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4881 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4882 destroy_client(clp
);
4886 node
= rb_first(&nn
->unconf_name_tree
);
4887 while (node
!= NULL
) {
4889 node
= rb_next(tmp
);
4890 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4891 rb_erase(tmp
, &nn
->unconf_name_tree
);
4892 destroy_client(clp
);
4895 kfree(nn
->sessionid_hashtbl
);
4896 kfree(nn
->lockowner_ino_hashtbl
);
4897 kfree(nn
->ownerstr_hashtbl
);
4898 kfree(nn
->unconf_id_hashtbl
);
4899 kfree(nn
->conf_id_hashtbl
);
4904 nfs4_state_start_net(struct net
*net
)
4906 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4909 ret
= nfs4_state_create_net(net
);
4912 nfsd4_client_tracking_init(net
);
4913 nn
->boot_time
= get_seconds();
4914 locks_start_grace(net
, &nn
->nfsd4_manager
);
4915 nn
->grace_ended
= false;
4916 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
4917 nn
->nfsd4_grace
, net
);
4918 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
4922 /* initialization to perform when the nfsd service is started: */
4925 nfs4_state_start(void)
4929 ret
= set_callback_cred();
4932 laundry_wq
= create_singlethread_workqueue("nfsd4");
4933 if (laundry_wq
== NULL
) {
4937 ret
= nfsd4_create_callback_queue();
4939 goto out_free_laundry
;
4941 set_max_delegations();
4946 destroy_workqueue(laundry_wq
);
4951 /* should be called with the state lock held */
4953 nfs4_state_shutdown_net(struct net
*net
)
4955 struct nfs4_delegation
*dp
= NULL
;
4956 struct list_head
*pos
, *next
, reaplist
;
4957 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4959 cancel_delayed_work_sync(&nn
->laundromat_work
);
4960 locks_end_grace(&nn
->nfsd4_manager
);
4962 INIT_LIST_HEAD(&reaplist
);
4963 spin_lock(&recall_lock
);
4964 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4965 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4966 if (dp
->dl_stid
.sc_client
->net
!= net
)
4968 list_move(&dp
->dl_recall_lru
, &reaplist
);
4970 spin_unlock(&recall_lock
);
4971 list_for_each_safe(pos
, next
, &reaplist
) {
4972 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4973 unhash_delegation(dp
);
4976 nfsd4_client_tracking_exit(net
);
4977 nfs4_state_destroy_net(net
);
4981 nfs4_state_shutdown(void)
4983 destroy_workqueue(laundry_wq
);
4984 nfsd4_destroy_callback_queue();
4988 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4990 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4991 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4995 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4997 if (cstate
->minorversion
) {
4998 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4999 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5004 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5006 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5010 * functions to set current state id
5013 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5015 put_stateid(cstate
, &odp
->od_stateid
);
5019 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5021 put_stateid(cstate
, &open
->op_stateid
);
5025 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5027 put_stateid(cstate
, &close
->cl_stateid
);
5031 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5033 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5037 * functions to consume current state id
5041 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5043 get_stateid(cstate
, &odp
->od_stateid
);
5047 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5049 get_stateid(cstate
, &drp
->dr_stateid
);
5053 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5055 get_stateid(cstate
, &fsp
->fr_stateid
);
5059 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5061 get_stateid(cstate
, &setattr
->sa_stateid
);
5065 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5067 get_stateid(cstate
, &close
->cl_stateid
);
5071 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5073 get_stateid(cstate
, &locku
->lu_stateid
);
5077 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5079 get_stateid(cstate
, &read
->rd_stateid
);
5083 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5085 get_stateid(cstate
, &write
->wr_stateid
);