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/clnt.h>
46 #include "current_stateid.h"
47 #include "fault_inject.h"
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 time_t nfsd4_lease
= 90; /* default lease time */
55 time_t nfsd4_grace
= 90;
57 #define all_ones {{~0,~0},~0}
58 static const stateid_t one_stateid
= {
60 .si_opaque
= all_ones
,
62 static const stateid_t zero_stateid
= {
65 static const stateid_t currentstateid
= {
69 static u64 current_sessionid
= 1;
71 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
72 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
73 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
80 /* Currently used for almost all code touching nfsv4 state: */
81 static DEFINE_MUTEX(client_mutex
);
84 * Currently used for the del_recall_lru and file hash table. In an
85 * effort to decrease the scope of the client_mutex, this spinlock may
86 * eventually cover more:
88 static DEFINE_SPINLOCK(recall_lock
);
90 static struct kmem_cache
*openowner_slab
= NULL
;
91 static struct kmem_cache
*lockowner_slab
= NULL
;
92 static struct kmem_cache
*file_slab
= NULL
;
93 static struct kmem_cache
*stateid_slab
= NULL
;
94 static struct kmem_cache
*deleg_slab
= NULL
;
99 mutex_lock(&client_mutex
);
102 static void free_session(struct kref
*);
104 /* Must be called under the client_lock */
105 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
107 kref_put(&ses
->se_ref
, free_session
);
110 static void nfsd4_get_session(struct nfsd4_session
*ses
)
112 kref_get(&ses
->se_ref
);
116 nfs4_unlock_state(void)
118 mutex_unlock(&client_mutex
);
122 opaque_hashval(const void *ptr
, int nbytes
)
124 unsigned char *cptr
= (unsigned char *) ptr
;
134 static struct list_head del_recall_lru
;
136 static void nfsd4_free_file(struct nfs4_file
*f
)
138 kmem_cache_free(file_slab
, f
);
142 put_nfs4_file(struct nfs4_file
*fi
)
144 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
145 list_del(&fi
->fi_hash
);
146 spin_unlock(&recall_lock
);
153 get_nfs4_file(struct nfs4_file
*fi
)
155 atomic_inc(&fi
->fi_ref
);
158 static int num_delegations
;
159 unsigned int max_delegations
;
162 * Open owner state (share locks)
165 /* hash tables for lock and open owners */
166 #define OWNER_HASH_BITS 8
167 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
168 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
170 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
174 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
176 return ret
& OWNER_HASH_MASK
;
179 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
181 /* hash table for nfs4_file */
182 #define FILE_HASH_BITS 8
183 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
185 static unsigned int file_hashval(struct inode
*ino
)
187 /* XXX: why are we hashing on inode pointer, anyway? */
188 return hash_ptr(ino
, FILE_HASH_BITS
);
191 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
193 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
195 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
196 atomic_inc(&fp
->fi_access
[oflag
]);
199 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
201 if (oflag
== O_RDWR
) {
202 __nfs4_file_get_access(fp
, O_RDONLY
);
203 __nfs4_file_get_access(fp
, O_WRONLY
);
205 __nfs4_file_get_access(fp
, oflag
);
208 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
210 if (fp
->fi_fds
[oflag
]) {
211 fput(fp
->fi_fds
[oflag
]);
212 fp
->fi_fds
[oflag
] = NULL
;
216 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
218 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
219 nfs4_file_put_fd(fp
, oflag
);
221 * It's also safe to get rid of the RDWR open *if*
222 * we no longer have need of the other kind of access
223 * or if we already have the other kind of open:
225 if (fp
->fi_fds
[1-oflag
]
226 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
227 nfs4_file_put_fd(fp
, O_RDWR
);
231 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
233 if (oflag
== O_RDWR
) {
234 __nfs4_file_put_access(fp
, O_RDONLY
);
235 __nfs4_file_put_access(fp
, O_WRONLY
);
237 __nfs4_file_put_access(fp
, oflag
);
240 static inline int get_new_stid(struct nfs4_stid
*stid
)
242 static int min_stateid
= 0;
243 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
247 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
249 * Note: the necessary preallocation was done in
250 * nfs4_alloc_stateid(). The idr code caps the number of
251 * preallocations that can exist at a time, but the state lock
252 * prevents anyone from using ours before we get here:
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_stid
+1;
266 if (min_stateid
== INT_MAX
)
271 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
273 stateid_t
*s
= &stid
->sc_stateid
;
276 stid
->sc_type
= type
;
277 stid
->sc_client
= cl
;
278 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
279 new_id
= get_new_stid(stid
);
280 s
->si_opaque
.so_id
= (u32
)new_id
;
281 /* Will be incremented before return to client: */
282 s
->si_generation
= 0;
285 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
287 struct idr
*stateids
= &cl
->cl_stateids
;
289 if (!idr_pre_get(stateids
, GFP_KERNEL
))
292 * Note: if we fail here (or any time between now and the time
293 * we actually get the new idr), we won't need to undo the idr
294 * preallocation, since the idr code caps the number of
295 * preallocated entries.
297 return kmem_cache_alloc(slab
, GFP_KERNEL
);
300 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
302 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
305 static struct nfs4_delegation
*
306 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
308 struct nfs4_delegation
*dp
;
309 struct nfs4_file
*fp
= stp
->st_file
;
311 dprintk("NFSD alloc_init_deleg\n");
313 * Major work on the lease subsystem (for example, to support
314 * calbacks on stat) will be required before we can support
315 * write delegations properly.
317 if (type
!= NFS4_OPEN_DELEGATE_READ
)
319 if (fp
->fi_had_conflict
)
321 if (num_delegations
> max_delegations
)
323 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
326 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
328 * delegation seqid's are never incremented. The 4.1 special
329 * meaning of seqid 0 isn't meaningful, really, but let's avoid
330 * 0 anyway just for consistency and use 1:
332 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
334 INIT_LIST_HEAD(&dp
->dl_perfile
);
335 INIT_LIST_HEAD(&dp
->dl_perclnt
);
336 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
340 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
342 atomic_set(&dp
->dl_count
, 1);
343 nfsd4_init_callback(&dp
->dl_recall
);
348 nfs4_put_delegation(struct nfs4_delegation
*dp
)
350 if (atomic_dec_and_test(&dp
->dl_count
)) {
351 dprintk("NFSD: freeing dp %p\n",dp
);
352 put_nfs4_file(dp
->dl_file
);
353 kmem_cache_free(deleg_slab
, dp
);
358 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
360 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
361 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
363 fput(fp
->fi_deleg_file
);
364 fp
->fi_deleg_file
= NULL
;
368 static void unhash_stid(struct nfs4_stid
*s
)
370 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
372 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
375 /* Called under the state lock. */
377 unhash_delegation(struct nfs4_delegation
*dp
)
379 unhash_stid(&dp
->dl_stid
);
380 list_del_init(&dp
->dl_perclnt
);
381 spin_lock(&recall_lock
);
382 list_del_init(&dp
->dl_perfile
);
383 list_del_init(&dp
->dl_recall_lru
);
384 spin_unlock(&recall_lock
);
385 nfs4_put_deleg_lease(dp
->dl_file
);
386 nfs4_put_delegation(dp
);
393 /* client_lock protects the client lru list and session hash table */
394 static DEFINE_SPINLOCK(client_lock
);
396 static unsigned int clientid_hashval(u32 id
)
398 return id
& CLIENT_HASH_MASK
;
401 static unsigned int clientstr_hashval(const char *name
)
403 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
407 * client_lru holds client queue ordered by nfs4_client.cl_time
410 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
411 * for last close replay.
413 * All of the above fields are protected by the client_mutex.
415 static struct list_head client_lru
;
416 static struct list_head close_lru
;
419 * We store the NONE, READ, WRITE, and BOTH bits separately in the
420 * st_{access,deny}_bmap field of the stateid, in order to track not
421 * only what share bits are currently in force, but also what
422 * combinations of share bits previous opens have used. This allows us
423 * to enforce the recommendation of rfc 3530 14.2.19 that the server
424 * return an error if the client attempt to downgrade to a combination
425 * of share bits not explicable by closing some of its previous opens.
427 * XXX: This enforcement is actually incomplete, since we don't keep
428 * track of access/deny bit combinations; so, e.g., we allow:
430 * OPEN allow read, deny write
431 * OPEN allow both, deny none
432 * DOWNGRADE allow read, deny none
434 * which we should reject.
437 bmap_to_share_mode(unsigned long bmap
) {
439 unsigned int access
= 0;
441 for (i
= 1; i
< 4; i
++) {
442 if (test_bit(i
, &bmap
))
449 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
450 unsigned int access
, deny
;
452 access
= bmap_to_share_mode(stp
->st_access_bmap
);
453 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
454 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
459 /* set share access for a given stateid */
461 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
463 __set_bit(access
, &stp
->st_access_bmap
);
466 /* clear share access for a given stateid */
468 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
470 __clear_bit(access
, &stp
->st_access_bmap
);
473 /* test whether a given stateid has access */
475 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
477 return test_bit(access
, &stp
->st_access_bmap
);
480 /* set share deny for a given stateid */
482 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
484 __set_bit(access
, &stp
->st_deny_bmap
);
487 /* clear share deny for a given stateid */
489 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
491 __clear_bit(access
, &stp
->st_deny_bmap
);
494 /* test whether a given stateid is denying specific access */
496 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
498 return test_bit(access
, &stp
->st_deny_bmap
);
501 static int nfs4_access_to_omode(u32 access
)
503 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
504 case NFS4_SHARE_ACCESS_READ
:
506 case NFS4_SHARE_ACCESS_WRITE
:
508 case NFS4_SHARE_ACCESS_BOTH
:
514 /* release all access and file references for a given stateid */
516 release_all_access(struct nfs4_ol_stateid
*stp
)
520 for (i
= 1; i
< 4; i
++) {
521 if (test_access(i
, stp
))
522 nfs4_file_put_access(stp
->st_file
,
523 nfs4_access_to_omode(i
));
524 clear_access(i
, stp
);
528 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
530 list_del(&stp
->st_perfile
);
531 list_del(&stp
->st_perstateowner
);
534 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
536 release_all_access(stp
);
537 put_nfs4_file(stp
->st_file
);
541 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
543 kmem_cache_free(stateid_slab
, stp
);
546 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
550 unhash_generic_stateid(stp
);
551 unhash_stid(&stp
->st_stid
);
552 file
= find_any_file(stp
->st_file
);
554 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
555 close_generic_stateid(stp
);
556 free_generic_stateid(stp
);
559 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
561 struct nfs4_ol_stateid
*stp
;
563 list_del(&lo
->lo_owner
.so_strhash
);
564 list_del(&lo
->lo_perstateid
);
565 list_del(&lo
->lo_owner_ino_hash
);
566 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
567 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
568 struct nfs4_ol_stateid
, st_perstateowner
);
569 release_lock_stateid(stp
);
573 static void release_lockowner(struct nfs4_lockowner
*lo
)
575 unhash_lockowner(lo
);
576 nfs4_free_lockowner(lo
);
580 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
582 struct nfs4_lockowner
*lo
;
584 while (!list_empty(&open_stp
->st_lockowners
)) {
585 lo
= list_entry(open_stp
->st_lockowners
.next
,
586 struct nfs4_lockowner
, lo_perstateid
);
587 release_lockowner(lo
);
591 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
593 unhash_generic_stateid(stp
);
594 release_stateid_lockowners(stp
);
595 close_generic_stateid(stp
);
598 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
600 unhash_open_stateid(stp
);
601 unhash_stid(&stp
->st_stid
);
602 free_generic_stateid(stp
);
605 static void unhash_openowner(struct nfs4_openowner
*oo
)
607 struct nfs4_ol_stateid
*stp
;
609 list_del(&oo
->oo_owner
.so_strhash
);
610 list_del(&oo
->oo_perclient
);
611 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
612 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
613 struct nfs4_ol_stateid
, st_perstateowner
);
614 release_open_stateid(stp
);
618 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
620 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
623 unhash_stid(&s
->st_stid
);
624 free_generic_stateid(s
);
625 oo
->oo_last_closed_stid
= NULL
;
629 static void release_openowner(struct nfs4_openowner
*oo
)
631 unhash_openowner(oo
);
632 list_del(&oo
->oo_close_lru
);
633 release_last_closed_stateid(oo
);
634 nfs4_free_openowner(oo
);
637 #define SESSION_HASH_SIZE 512
638 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
641 hash_sessionid(struct nfs4_sessionid
*sessionid
)
643 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
645 return sid
->sequence
% SESSION_HASH_SIZE
;
650 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
652 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
653 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
657 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
664 gen_sessionid(struct nfsd4_session
*ses
)
666 struct nfs4_client
*clp
= ses
->se_client
;
667 struct nfsd4_sessionid
*sid
;
669 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
670 sid
->clientid
= clp
->cl_clientid
;
671 sid
->sequence
= current_sessionid
++;
676 * The protocol defines ca_maxresponssize_cached to include the size of
677 * the rpc header, but all we need to cache is the data starting after
678 * the end of the initial SEQUENCE operation--the rest we regenerate
679 * each time. Therefore we can advertise a ca_maxresponssize_cached
680 * value that is the number of bytes in our cache plus a few additional
681 * bytes. In order to stay on the safe side, and not promise more than
682 * we can cache, those additional bytes must be the minimum possible: 24
683 * bytes of rpc header (xid through accept state, with AUTH_NULL
684 * verifier), 12 for the compound header (with zero-length tag), and 44
685 * for the SEQUENCE op response:
687 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
690 free_session_slots(struct nfsd4_session
*ses
)
694 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
695 kfree(ses
->se_slots
[i
]);
699 * We don't actually need to cache the rpc and session headers, so we
700 * can allocate a little less for each slot:
702 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
704 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
707 static int nfsd4_sanitize_slot_size(u32 size
)
709 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
710 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
716 * XXX: If we run out of reserved DRC memory we could (up to a point)
717 * re-negotiate active sessions and reduce their slot usage to make
718 * room for new connections. For now we just fail the create session.
720 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
724 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
726 spin_lock(&nfsd_drc_lock
);
727 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
728 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
729 num
= min_t(int, num
, avail
/ slotsize
);
730 nfsd_drc_mem_used
+= num
* slotsize
;
731 spin_unlock(&nfsd_drc_lock
);
736 static void nfsd4_put_drc_mem(int slotsize
, int num
)
738 spin_lock(&nfsd_drc_lock
);
739 nfsd_drc_mem_used
-= slotsize
* num
;
740 spin_unlock(&nfsd_drc_lock
);
743 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
745 struct nfsd4_session
*new;
748 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
749 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
750 mem
= numslots
* sizeof(struct nfsd4_slot
*);
752 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
755 /* allocate each struct nfsd4_slot and data cache in one piece */
756 for (i
= 0; i
< numslots
; i
++) {
757 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
758 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
759 if (!new->se_slots
[i
])
765 kfree(new->se_slots
[i
]);
770 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
772 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
774 new->maxreqs
= numslots
;
775 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
776 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
777 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
778 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
779 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
782 static void free_conn(struct nfsd4_conn
*c
)
784 svc_xprt_put(c
->cn_xprt
);
788 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
790 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
791 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
793 spin_lock(&clp
->cl_lock
);
794 if (!list_empty(&c
->cn_persession
)) {
795 list_del(&c
->cn_persession
);
798 spin_unlock(&clp
->cl_lock
);
799 nfsd4_probe_callback(clp
);
802 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
804 struct nfsd4_conn
*conn
;
806 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
809 svc_xprt_get(rqstp
->rq_xprt
);
810 conn
->cn_xprt
= rqstp
->rq_xprt
;
811 conn
->cn_flags
= flags
;
812 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
816 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
818 conn
->cn_session
= ses
;
819 list_add(&conn
->cn_persession
, &ses
->se_conns
);
822 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
824 struct nfs4_client
*clp
= ses
->se_client
;
826 spin_lock(&clp
->cl_lock
);
827 __nfsd4_hash_conn(conn
, ses
);
828 spin_unlock(&clp
->cl_lock
);
831 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
833 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
834 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
837 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
841 nfsd4_hash_conn(conn
, ses
);
842 ret
= nfsd4_register_conn(conn
);
844 /* oops; xprt is already down: */
845 nfsd4_conn_lost(&conn
->cn_xpt_user
);
846 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
847 /* callback channel may be back up */
848 nfsd4_probe_callback(ses
->se_client
);
852 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
854 u32 dir
= NFS4_CDFC4_FORE
;
856 if (cses
->flags
& SESSION4_BACK_CHAN
)
857 dir
|= NFS4_CDFC4_BACK
;
858 return alloc_conn(rqstp
, dir
);
861 /* must be called under client_lock */
862 static void nfsd4_del_conns(struct nfsd4_session
*s
)
864 struct nfs4_client
*clp
= s
->se_client
;
865 struct nfsd4_conn
*c
;
867 spin_lock(&clp
->cl_lock
);
868 while (!list_empty(&s
->se_conns
)) {
869 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
870 list_del_init(&c
->cn_persession
);
871 spin_unlock(&clp
->cl_lock
);
873 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
876 spin_lock(&clp
->cl_lock
);
878 spin_unlock(&clp
->cl_lock
);
881 static void __free_session(struct nfsd4_session
*ses
)
883 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
884 free_session_slots(ses
);
888 static void free_session(struct kref
*kref
)
890 struct nfsd4_session
*ses
;
892 lockdep_assert_held(&client_lock
);
893 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
894 nfsd4_del_conns(ses
);
898 void nfsd4_put_session(struct nfsd4_session
*ses
)
900 spin_lock(&client_lock
);
901 nfsd4_put_session_locked(ses
);
902 spin_unlock(&client_lock
);
905 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
)
907 struct nfsd4_session
*new;
908 int numslots
, slotsize
;
910 * Note decreasing slot size below client's request may
911 * make it difficult for client to function correctly, whereas
912 * decreasing the number of slots will (just?) affect
913 * performance. When short on memory we therefore prefer to
914 * decrease number of slots instead of their size.
916 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
917 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
921 new = __alloc_session(slotsize
, numslots
);
923 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
926 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
930 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
934 new->se_client
= clp
;
937 INIT_LIST_HEAD(&new->se_conns
);
939 new->se_cb_seq_nr
= 1;
940 new->se_flags
= cses
->flags
;
941 new->se_cb_prog
= cses
->callback_prog
;
942 new->se_cb_sec
= cses
->cb_sec
;
943 kref_init(&new->se_ref
);
944 idx
= hash_sessionid(&new->se_sessionid
);
945 spin_lock(&client_lock
);
946 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
947 spin_lock(&clp
->cl_lock
);
948 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
949 spin_unlock(&clp
->cl_lock
);
950 spin_unlock(&client_lock
);
952 if (cses
->flags
& SESSION4_BACK_CHAN
) {
953 struct sockaddr
*sa
= svc_addr(rqstp
);
955 * This is a little silly; with sessions there's no real
956 * use for the callback address. Use the peer address
957 * as a reasonable default for now, but consider fixing
958 * the rpc client not to require an address in the
961 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
962 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
966 /* caller must hold client_lock */
967 static struct nfsd4_session
*
968 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
970 struct nfsd4_session
*elem
;
973 dump_sessionid(__func__
, sessionid
);
974 idx
= hash_sessionid(sessionid
);
975 /* Search in the appropriate list */
976 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
977 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
978 NFS4_MAX_SESSIONID_LEN
)) {
983 dprintk("%s: session not found\n", __func__
);
987 /* caller must hold client_lock */
989 unhash_session(struct nfsd4_session
*ses
)
991 list_del(&ses
->se_hash
);
992 spin_lock(&ses
->se_client
->cl_lock
);
993 list_del(&ses
->se_perclnt
);
994 spin_unlock(&ses
->se_client
->cl_lock
);
997 /* must be called under the client_lock */
999 renew_client_locked(struct nfs4_client
*clp
)
1001 if (is_client_expired(clp
)) {
1003 printk("%s: client (clientid %08x/%08x) already expired\n",
1005 clp
->cl_clientid
.cl_boot
,
1006 clp
->cl_clientid
.cl_id
);
1010 dprintk("renewing client (clientid %08x/%08x)\n",
1011 clp
->cl_clientid
.cl_boot
,
1012 clp
->cl_clientid
.cl_id
);
1013 list_move_tail(&clp
->cl_lru
, &client_lru
);
1014 clp
->cl_time
= get_seconds();
1018 renew_client(struct nfs4_client
*clp
)
1020 spin_lock(&client_lock
);
1021 renew_client_locked(clp
);
1022 spin_unlock(&client_lock
);
1025 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1027 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1029 if (clid
->cl_boot
== nn
->boot_time
)
1031 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1032 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1037 * XXX Should we use a slab cache ?
1038 * This type of memory management is somewhat inefficient, but we use it
1039 * anyway since SETCLIENTID is not a common operation.
1041 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1043 struct nfs4_client
*clp
;
1045 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1048 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1049 if (clp
->cl_name
.data
== NULL
) {
1053 clp
->cl_name
.len
= name
.len
;
1058 free_client(struct nfs4_client
*clp
)
1060 lockdep_assert_held(&client_lock
);
1061 while (!list_empty(&clp
->cl_sessions
)) {
1062 struct nfsd4_session
*ses
;
1063 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1065 list_del(&ses
->se_perclnt
);
1066 nfsd4_put_session_locked(ses
);
1068 free_svc_cred(&clp
->cl_cred
);
1069 kfree(clp
->cl_name
.data
);
1074 release_session_client(struct nfsd4_session
*session
)
1076 struct nfs4_client
*clp
= session
->se_client
;
1078 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1080 if (is_client_expired(clp
)) {
1082 session
->se_client
= NULL
;
1084 renew_client_locked(clp
);
1085 spin_unlock(&client_lock
);
1088 /* must be called under the client_lock */
1090 unhash_client_locked(struct nfs4_client
*clp
)
1092 struct nfsd4_session
*ses
;
1094 mark_client_expired(clp
);
1095 list_del(&clp
->cl_lru
);
1096 spin_lock(&clp
->cl_lock
);
1097 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1098 list_del_init(&ses
->se_hash
);
1099 spin_unlock(&clp
->cl_lock
);
1103 destroy_client(struct nfs4_client
*clp
)
1105 struct nfs4_openowner
*oo
;
1106 struct nfs4_delegation
*dp
;
1107 struct list_head reaplist
;
1108 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1110 INIT_LIST_HEAD(&reaplist
);
1111 spin_lock(&recall_lock
);
1112 while (!list_empty(&clp
->cl_delegations
)) {
1113 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1114 list_del_init(&dp
->dl_perclnt
);
1115 list_move(&dp
->dl_recall_lru
, &reaplist
);
1117 spin_unlock(&recall_lock
);
1118 while (!list_empty(&reaplist
)) {
1119 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1120 unhash_delegation(dp
);
1122 while (!list_empty(&clp
->cl_openowners
)) {
1123 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1124 release_openowner(oo
);
1126 nfsd4_shutdown_callback(clp
);
1127 if (clp
->cl_cb_conn
.cb_xprt
)
1128 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1129 list_del(&clp
->cl_idhash
);
1130 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1131 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1133 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1134 spin_lock(&client_lock
);
1135 unhash_client_locked(clp
);
1136 if (atomic_read(&clp
->cl_refcount
) == 0)
1138 spin_unlock(&client_lock
);
1141 static void expire_client(struct nfs4_client
*clp
)
1143 nfsd4_client_record_remove(clp
);
1144 destroy_client(clp
);
1147 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1149 memcpy(target
->cl_verifier
.data
, source
->data
,
1150 sizeof(target
->cl_verifier
.data
));
1153 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1155 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1156 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1159 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1161 if (source
->cr_principal
) {
1162 target
->cr_principal
=
1163 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1164 if (target
->cr_principal
== NULL
)
1167 target
->cr_principal
= NULL
;
1168 target
->cr_flavor
= source
->cr_flavor
;
1169 target
->cr_uid
= source
->cr_uid
;
1170 target
->cr_gid
= source
->cr_gid
;
1171 target
->cr_group_info
= source
->cr_group_info
;
1172 get_group_info(target
->cr_group_info
);
1177 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1181 res
= o1
->len
- o2
->len
;
1184 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1187 static int same_name(const char *n1
, const char *n2
)
1189 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1193 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1195 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1199 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1201 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1204 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1208 if (g1
->ngroups
!= g2
->ngroups
)
1210 for (i
=0; i
<g1
->ngroups
; i
++)
1211 if (GROUP_AT(g1
, i
) != GROUP_AT(g2
, i
))
1217 * RFC 3530 language requires clid_inuse be returned when the
1218 * "principal" associated with a requests differs from that previously
1219 * used. We use uid, gid's, and gss principal string as our best
1220 * approximation. We also don't want to allow non-gss use of a client
1221 * established using gss: in theory cr_principal should catch that
1222 * change, but in practice cr_principal can be null even in the gss case
1223 * since gssd doesn't always pass down a principal string.
1225 static bool is_gss_cred(struct svc_cred
*cr
)
1227 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1228 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1233 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1235 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1236 || (cr1
->cr_uid
!= cr2
->cr_uid
)
1237 || (cr1
->cr_gid
!= cr2
->cr_gid
)
1238 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1240 if (cr1
->cr_principal
== cr2
->cr_principal
)
1242 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1244 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1247 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1249 static u32 current_clientid
= 1;
1251 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1252 clp
->cl_clientid
.cl_id
= current_clientid
++;
1255 static void gen_confirm(struct nfs4_client
*clp
)
1260 verf
[0] = (__be32
)get_seconds();
1261 verf
[1] = (__be32
)i
++;
1262 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1265 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1267 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1270 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1272 struct nfs4_stid
*s
;
1274 s
= find_stateid(cl
, t
);
1277 if (typemask
& s
->sc_type
)
1282 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1283 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1285 struct nfs4_client
*clp
;
1286 struct sockaddr
*sa
= svc_addr(rqstp
);
1288 struct net
*net
= SVC_NET(rqstp
);
1290 clp
= alloc_client(name
);
1294 INIT_LIST_HEAD(&clp
->cl_sessions
);
1295 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1297 spin_lock(&client_lock
);
1299 spin_unlock(&client_lock
);
1302 idr_init(&clp
->cl_stateids
);
1303 atomic_set(&clp
->cl_refcount
, 0);
1304 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1305 INIT_LIST_HEAD(&clp
->cl_idhash
);
1306 INIT_LIST_HEAD(&clp
->cl_openowners
);
1307 INIT_LIST_HEAD(&clp
->cl_delegations
);
1308 INIT_LIST_HEAD(&clp
->cl_lru
);
1309 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1310 spin_lock_init(&clp
->cl_lock
);
1311 nfsd4_init_callback(&clp
->cl_cb_null
);
1312 clp
->cl_time
= get_seconds();
1313 clear_bit(0, &clp
->cl_cb_slot_busy
);
1314 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1315 copy_verf(clp
, verf
);
1316 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1318 clp
->cl_cb_session
= NULL
;
1324 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1326 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1327 struct nfs4_client
*clp
;
1330 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1333 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1334 new = &((*new)->rb_left
);
1336 new = &((*new)->rb_right
);
1339 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1340 rb_insert_color(&new_clp
->cl_namenode
, root
);
1343 static struct nfs4_client
*
1344 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1347 struct rb_node
*node
= root
->rb_node
;
1348 struct nfs4_client
*clp
;
1351 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1352 cmp
= compare_blob(&clp
->cl_name
, name
);
1354 node
= node
->rb_left
;
1356 node
= node
->rb_right
;
1364 add_to_unconfirmed(struct nfs4_client
*clp
)
1366 unsigned int idhashval
;
1367 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1369 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1370 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1371 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1372 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1377 move_to_confirmed(struct nfs4_client
*clp
)
1379 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1380 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1382 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1383 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1384 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1385 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1386 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1390 static struct nfs4_client
*
1391 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1393 struct nfs4_client
*clp
;
1394 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1396 list_for_each_entry(clp
, &nn
->conf_id_hashtbl
[idhashval
], cl_idhash
) {
1397 if (same_clid(&clp
->cl_clientid
, clid
)) {
1398 if ((bool)clp
->cl_minorversion
!= sessions
)
1407 static struct nfs4_client
*
1408 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1410 struct nfs4_client
*clp
;
1411 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1413 list_for_each_entry(clp
, &nn
->unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1414 if (same_clid(&clp
->cl_clientid
, clid
)) {
1415 if ((bool)clp
->cl_minorversion
!= sessions
)
1423 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1425 return clp
->cl_exchange_flags
!= 0;
1428 static struct nfs4_client
*
1429 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1431 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1434 static struct nfs4_client
*
1435 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1437 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1441 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1443 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1444 struct sockaddr
*sa
= svc_addr(rqstp
);
1445 u32 scopeid
= rpc_get_scope_id(sa
);
1446 unsigned short expected_family
;
1448 /* Currently, we only support tcp and tcp6 for the callback channel */
1449 if (se
->se_callback_netid_len
== 3 &&
1450 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1451 expected_family
= AF_INET
;
1452 else if (se
->se_callback_netid_len
== 4 &&
1453 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1454 expected_family
= AF_INET6
;
1458 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1459 se
->se_callback_addr_len
,
1460 (struct sockaddr
*)&conn
->cb_addr
,
1461 sizeof(conn
->cb_addr
));
1463 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1466 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1467 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1469 conn
->cb_prog
= se
->se_callback_prog
;
1470 conn
->cb_ident
= se
->se_callback_ident
;
1471 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1474 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1475 conn
->cb_addrlen
= 0;
1476 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1477 "will not receive delegations\n",
1478 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1484 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1487 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1489 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1492 dprintk("--> %s slot %p\n", __func__
, slot
);
1494 slot
->sl_opcnt
= resp
->opcnt
;
1495 slot
->sl_status
= resp
->cstate
.status
;
1497 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1498 if (nfsd4_not_cached(resp
)) {
1499 slot
->sl_datalen
= 0;
1502 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1503 base
= (char *)resp
->cstate
.datap
-
1504 (char *)resp
->xbuf
->head
[0].iov_base
;
1505 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1507 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1512 * Encode the replay sequence operation from the slot values.
1513 * If cachethis is FALSE encode the uncached rep error on the next
1514 * operation which sets resp->p and increments resp->opcnt for
1515 * nfs4svc_encode_compoundres.
1519 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1520 struct nfsd4_compoundres
*resp
)
1522 struct nfsd4_op
*op
;
1523 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1525 /* Encode the replayed sequence operation */
1526 op
= &args
->ops
[resp
->opcnt
- 1];
1527 nfsd4_encode_operation(resp
, op
);
1529 /* Return nfserr_retry_uncached_rep in next operation. */
1530 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1531 op
= &args
->ops
[resp
->opcnt
++];
1532 op
->status
= nfserr_retry_uncached_rep
;
1533 nfsd4_encode_operation(resp
, op
);
1539 * The sequence operation is not cached because we can use the slot and
1543 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1544 struct nfsd4_sequence
*seq
)
1546 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1549 dprintk("--> %s slot %p\n", __func__
, slot
);
1551 /* Either returns 0 or nfserr_retry_uncached */
1552 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1553 if (status
== nfserr_retry_uncached_rep
)
1556 /* The sequence operation has been encoded, cstate->datap set. */
1557 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1559 resp
->opcnt
= slot
->sl_opcnt
;
1560 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1561 status
= slot
->sl_status
;
1567 * Set the exchange_id flags returned by the server.
1570 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1572 /* pNFS is not supported */
1573 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1575 /* Referrals are supported, Migration is not. */
1576 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1578 /* set the wire flags to return to client. */
1579 clid
->flags
= new->cl_exchange_flags
;
1582 static bool client_has_state(struct nfs4_client
*clp
)
1585 * Note clp->cl_openowners check isn't quite right: there's no
1586 * need to count owners without stateid's.
1588 * Also note we should probably be using this in 4.0 case too.
1590 return !list_empty(&clp
->cl_openowners
)
1591 || !list_empty(&clp
->cl_delegations
)
1592 || !list_empty(&clp
->cl_sessions
);
1596 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1597 struct nfsd4_compound_state
*cstate
,
1598 struct nfsd4_exchange_id
*exid
)
1600 struct nfs4_client
*unconf
, *conf
, *new;
1602 char addr_str
[INET6_ADDRSTRLEN
];
1603 nfs4_verifier verf
= exid
->verifier
;
1604 struct sockaddr
*sa
= svc_addr(rqstp
);
1605 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1606 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1608 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1609 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1610 "ip_addr=%s flags %x, spa_how %d\n",
1611 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1612 addr_str
, exid
->flags
, exid
->spa_how
);
1614 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1615 return nfserr_inval
;
1617 /* Currently only support SP4_NONE */
1618 switch (exid
->spa_how
) {
1622 return nfserr_serverfault
;
1624 BUG(); /* checked by xdr code */
1626 return nfserr_serverfault
; /* no excuse :-/ */
1629 /* Cases below refer to rfc 5661 section 18.35.4: */
1631 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1633 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1634 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1637 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1638 status
= nfserr_inval
;
1641 if (!creds_match
) { /* case 9 */
1642 status
= nfserr_perm
;
1645 if (!verfs_match
) { /* case 8 */
1646 status
= nfserr_not_same
;
1650 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1654 if (!creds_match
) { /* case 3 */
1655 if (client_has_state(conf
)) {
1656 status
= nfserr_clid_inuse
;
1659 expire_client(conf
);
1662 if (verfs_match
) { /* case 2 */
1663 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1667 /* case 5, client reboot */
1671 if (update
) { /* case 7 */
1672 status
= nfserr_noent
;
1676 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1677 if (unconf
) /* case 4, possible retry or client restart */
1678 expire_client(unconf
);
1680 /* case 1 (normal case) */
1682 new = create_client(exid
->clname
, rqstp
, &verf
);
1684 status
= nfserr_jukebox
;
1687 new->cl_minorversion
= 1;
1690 add_to_unconfirmed(new);
1692 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1693 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1695 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1696 nfsd4_set_ex_flags(new, exid
);
1698 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1699 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1703 nfs4_unlock_state();
1708 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1710 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1713 /* The slot is in use, and no response has been sent. */
1715 if (seqid
== slot_seqid
)
1716 return nfserr_jukebox
;
1718 return nfserr_seq_misordered
;
1720 /* Note unsigned 32-bit arithmetic handles wraparound: */
1721 if (likely(seqid
== slot_seqid
+ 1))
1723 if (seqid
== slot_seqid
)
1724 return nfserr_replay_cache
;
1725 return nfserr_seq_misordered
;
1729 * Cache the create session result into the create session single DRC
1730 * slot cache by saving the xdr structure. sl_seqid has been set.
1731 * Do this for solo or embedded create session operations.
1734 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1735 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1737 slot
->sl_status
= nfserr
;
1738 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1742 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1743 struct nfsd4_clid_slot
*slot
)
1745 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1746 return slot
->sl_status
;
1749 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1750 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1751 1 + /* MIN tag is length with zero, only length */ \
1752 3 + /* version, opcount, opcode */ \
1753 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1754 /* seqid, slotID, slotID, cache */ \
1755 4 ) * sizeof(__be32))
1757 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1758 2 + /* verifier: AUTH_NULL, length 0 */\
1760 1 + /* MIN tag is length with zero, only length */ \
1761 3 + /* opcount, opcode, opstatus*/ \
1762 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1763 /* seqid, slotID, slotID, slotID, status */ \
1764 5 ) * sizeof(__be32))
1766 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1768 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1769 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1773 nfsd4_create_session(struct svc_rqst
*rqstp
,
1774 struct nfsd4_compound_state
*cstate
,
1775 struct nfsd4_create_session
*cr_ses
)
1777 struct sockaddr
*sa
= svc_addr(rqstp
);
1778 struct nfs4_client
*conf
, *unconf
;
1779 struct nfsd4_session
*new;
1780 struct nfsd4_conn
*conn
;
1781 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1783 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1785 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1786 return nfserr_inval
;
1787 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1788 return nfserr_toosmall
;
1789 new = alloc_session(&cr_ses
->fore_channel
);
1791 return nfserr_jukebox
;
1792 status
= nfserr_jukebox
;
1793 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1795 goto out_free_session
;
1798 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1799 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1802 cs_slot
= &conf
->cl_cs_slot
;
1803 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1804 if (status
== nfserr_replay_cache
) {
1805 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1807 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1808 status
= nfserr_seq_misordered
;
1811 } else if (unconf
) {
1812 struct nfs4_client
*old
;
1813 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1814 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1815 status
= nfserr_clid_inuse
;
1818 cs_slot
= &unconf
->cl_cs_slot
;
1819 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1821 /* an unconfirmed replay returns misordered */
1822 status
= nfserr_seq_misordered
;
1825 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1828 move_to_confirmed(unconf
);
1831 status
= nfserr_stale_clientid
;
1836 * We do not support RDMA or persistent sessions
1838 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1839 cr_ses
->flags
&= ~SESSION4_RDMA
;
1841 init_session(rqstp
, new, conf
, cr_ses
);
1842 nfsd4_init_conn(rqstp
, conn
, new);
1844 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1845 NFS4_MAX_SESSIONID_LEN
);
1846 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1847 sizeof(struct nfsd4_channel_attrs
));
1848 cs_slot
->sl_seqid
++;
1849 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1851 /* cache solo and embedded create sessions under the state lock */
1852 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1854 nfs4_unlock_state();
1855 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1860 __free_session(new);
1864 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1866 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1867 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1869 return argp
->opcnt
== resp
->opcnt
;
1872 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1875 case NFS4_CDFC4_FORE
:
1876 case NFS4_CDFC4_BACK
:
1878 case NFS4_CDFC4_FORE_OR_BOTH
:
1879 case NFS4_CDFC4_BACK_OR_BOTH
:
1880 *dir
= NFS4_CDFC4_BOTH
;
1883 return nfserr_inval
;
1886 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1888 struct nfsd4_session
*session
= cstate
->session
;
1890 spin_lock(&client_lock
);
1891 session
->se_cb_prog
= bc
->bc_cb_program
;
1892 session
->se_cb_sec
= bc
->bc_cb_sec
;
1893 spin_unlock(&client_lock
);
1895 nfsd4_probe_callback(session
->se_client
);
1900 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1901 struct nfsd4_compound_state
*cstate
,
1902 struct nfsd4_bind_conn_to_session
*bcts
)
1905 struct nfsd4_conn
*conn
;
1907 if (!nfsd4_last_compound_op(rqstp
))
1908 return nfserr_not_only_op
;
1909 spin_lock(&client_lock
);
1910 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1911 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1912 * client_lock iself: */
1913 if (cstate
->session
) {
1914 nfsd4_get_session(cstate
->session
);
1915 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1917 spin_unlock(&client_lock
);
1918 if (!cstate
->session
)
1919 return nfserr_badsession
;
1921 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1924 conn
= alloc_conn(rqstp
, bcts
->dir
);
1926 return nfserr_jukebox
;
1927 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1931 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1935 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1939 nfsd4_destroy_session(struct svc_rqst
*r
,
1940 struct nfsd4_compound_state
*cstate
,
1941 struct nfsd4_destroy_session
*sessionid
)
1943 struct nfsd4_session
*ses
;
1944 __be32 status
= nfserr_badsession
;
1947 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1948 * - Should we return nfserr_back_chan_busy if waiting for
1949 * callbacks on to-be-destroyed session?
1950 * - Do we need to clear any callback info from previous session?
1953 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1954 if (!nfsd4_last_compound_op(r
))
1955 return nfserr_not_only_op
;
1957 dump_sessionid(__func__
, &sessionid
->sessionid
);
1958 spin_lock(&client_lock
);
1959 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1961 spin_unlock(&client_lock
);
1965 unhash_session(ses
);
1966 spin_unlock(&client_lock
);
1969 nfsd4_probe_callback_sync(ses
->se_client
);
1970 nfs4_unlock_state();
1972 spin_lock(&client_lock
);
1973 nfsd4_del_conns(ses
);
1974 nfsd4_put_session_locked(ses
);
1975 spin_unlock(&client_lock
);
1978 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1982 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1984 struct nfsd4_conn
*c
;
1986 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1987 if (c
->cn_xprt
== xpt
) {
1994 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1996 struct nfs4_client
*clp
= ses
->se_client
;
1997 struct nfsd4_conn
*c
;
2000 spin_lock(&clp
->cl_lock
);
2001 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
2003 spin_unlock(&clp
->cl_lock
);
2007 __nfsd4_hash_conn(new, ses
);
2008 spin_unlock(&clp
->cl_lock
);
2009 ret
= nfsd4_register_conn(new);
2011 /* oops; xprt is already down: */
2012 nfsd4_conn_lost(&new->cn_xpt_user
);
2016 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2018 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2020 return args
->opcnt
> session
->se_fchannel
.maxops
;
2023 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2024 struct nfsd4_session
*session
)
2026 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2028 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2032 nfsd4_sequence(struct svc_rqst
*rqstp
,
2033 struct nfsd4_compound_state
*cstate
,
2034 struct nfsd4_sequence
*seq
)
2036 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2037 struct nfsd4_session
*session
;
2038 struct nfsd4_slot
*slot
;
2039 struct nfsd4_conn
*conn
;
2042 if (resp
->opcnt
!= 1)
2043 return nfserr_sequence_pos
;
2046 * Will be either used or freed by nfsd4_sequence_check_conn
2049 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2051 return nfserr_jukebox
;
2053 spin_lock(&client_lock
);
2054 status
= nfserr_badsession
;
2055 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
2059 status
= nfserr_too_many_ops
;
2060 if (nfsd4_session_too_many_ops(rqstp
, session
))
2063 status
= nfserr_req_too_big
;
2064 if (nfsd4_request_too_big(rqstp
, session
))
2067 status
= nfserr_badslot
;
2068 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2071 slot
= session
->se_slots
[seq
->slotid
];
2072 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2074 /* We do not negotiate the number of slots yet, so set the
2075 * maxslots to the session maxreqs which is used to encode
2076 * sr_highest_slotid and the sr_target_slot id to maxslots */
2077 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2079 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2080 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2081 if (status
== nfserr_replay_cache
) {
2082 status
= nfserr_seq_misordered
;
2083 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2085 cstate
->slot
= slot
;
2086 cstate
->session
= session
;
2087 /* Return the cached reply status and set cstate->status
2088 * for nfsd4_proc_compound processing */
2089 status
= nfsd4_replay_cache_entry(resp
, seq
);
2090 cstate
->status
= nfserr_replay_cache
;
2096 nfsd4_sequence_check_conn(conn
, session
);
2099 /* Success! bump slot seqid */
2100 slot
->sl_seqid
= seq
->seqid
;
2101 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2103 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2105 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2107 cstate
->slot
= slot
;
2108 cstate
->session
= session
;
2111 /* Hold a session reference until done processing the compound. */
2112 if (cstate
->session
) {
2113 struct nfs4_client
*clp
= session
->se_client
;
2115 nfsd4_get_session(cstate
->session
);
2116 atomic_inc(&clp
->cl_refcount
);
2117 switch (clp
->cl_cb_state
) {
2119 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2121 case NFSD4_CB_FAULT
:
2122 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2125 seq
->status_flags
= 0;
2129 spin_unlock(&client_lock
);
2130 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2135 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2137 struct nfs4_client
*conf
, *unconf
, *clp
;
2139 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2142 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2143 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2148 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2149 status
= nfserr_clientid_busy
;
2153 /* rfc5661 18.50.3 */
2154 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2155 status
= nfserr_clientid_busy
;
2161 status
= nfserr_stale_clientid
;
2167 nfs4_unlock_state();
2168 dprintk("%s return %d\n", __func__
, ntohl(status
));
2173 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2177 if (rc
->rca_one_fs
) {
2178 if (!cstate
->current_fh
.fh_dentry
)
2179 return nfserr_nofilehandle
;
2181 * We don't take advantage of the rca_one_fs case.
2182 * That's OK, it's optional, we can safely ignore it.
2188 status
= nfserr_complete_already
;
2189 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2190 &cstate
->session
->se_client
->cl_flags
))
2193 status
= nfserr_stale_clientid
;
2194 if (is_client_expired(cstate
->session
->se_client
))
2196 * The following error isn't really legal.
2197 * But we only get here if the client just explicitly
2198 * destroyed the client. Surely it no longer cares what
2199 * error it gets back on an operation for the dead
2205 nfsd4_client_record_create(cstate
->session
->se_client
);
2207 nfs4_unlock_state();
2212 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2213 struct nfsd4_setclientid
*setclid
)
2215 struct xdr_netobj clname
= setclid
->se_name
;
2216 nfs4_verifier clverifier
= setclid
->se_verf
;
2217 struct nfs4_client
*conf
, *unconf
, *new;
2219 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2221 /* Cases below refer to rfc 3530 section 14.2.33: */
2223 conf
= find_confirmed_client_by_name(&clname
, nn
);
2226 status
= nfserr_clid_inuse
;
2227 if (clp_used_exchangeid(conf
))
2229 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2230 char addr_str
[INET6_ADDRSTRLEN
];
2231 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2233 dprintk("NFSD: setclientid: string in use by client "
2234 "at %s\n", addr_str
);
2238 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2240 expire_client(unconf
);
2241 status
= nfserr_jukebox
;
2242 new = create_client(clname
, rqstp
, &clverifier
);
2245 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2246 /* case 1: probable callback update */
2247 copy_clid(new, conf
);
2248 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2250 new->cl_minorversion
= 0;
2251 gen_callback(new, setclid
, rqstp
);
2252 add_to_unconfirmed(new);
2253 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2254 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2255 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2258 nfs4_unlock_state();
2264 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2265 struct nfsd4_compound_state
*cstate
,
2266 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2268 struct nfs4_client
*conf
, *unconf
;
2269 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2270 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2272 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2274 if (STALE_CLIENTID(clid
, nn
))
2275 return nfserr_stale_clientid
;
2278 conf
= find_confirmed_client(clid
, false, nn
);
2279 unconf
= find_unconfirmed_client(clid
, false, nn
);
2281 * We try hard to give out unique clientid's, so if we get an
2282 * attempt to confirm the same clientid with a different cred,
2283 * there's a bug somewhere. Let's charitably assume it's our
2286 status
= nfserr_serverfault
;
2287 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2289 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2291 /* cases below refer to rfc 3530 section 14.2.34: */
2292 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2293 if (conf
&& !unconf
) /* case 2: probable retransmit */
2295 else /* case 4: client hasn't noticed we rebooted yet? */
2296 status
= nfserr_stale_clientid
;
2300 if (conf
) { /* case 1: callback update */
2301 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2302 nfsd4_probe_callback(conf
);
2303 expire_client(unconf
);
2304 } else { /* case 3: normal case; new or rebooted client */
2305 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2307 expire_client(conf
);
2308 move_to_confirmed(unconf
);
2309 nfsd4_probe_callback(unconf
);
2312 nfs4_unlock_state();
2316 static struct nfs4_file
*nfsd4_alloc_file(void)
2318 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2321 /* OPEN Share state helper functions */
2322 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2324 unsigned int hashval
= file_hashval(ino
);
2326 atomic_set(&fp
->fi_ref
, 1);
2327 INIT_LIST_HEAD(&fp
->fi_hash
);
2328 INIT_LIST_HEAD(&fp
->fi_stateids
);
2329 INIT_LIST_HEAD(&fp
->fi_delegations
);
2330 fp
->fi_inode
= igrab(ino
);
2331 fp
->fi_had_conflict
= false;
2332 fp
->fi_lease
= NULL
;
2333 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2334 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2335 spin_lock(&recall_lock
);
2336 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2337 spin_unlock(&recall_lock
);
2341 nfsd4_free_slab(struct kmem_cache
**slab
)
2345 kmem_cache_destroy(*slab
);
2350 nfsd4_free_slabs(void)
2352 nfsd4_free_slab(&openowner_slab
);
2353 nfsd4_free_slab(&lockowner_slab
);
2354 nfsd4_free_slab(&file_slab
);
2355 nfsd4_free_slab(&stateid_slab
);
2356 nfsd4_free_slab(&deleg_slab
);
2360 nfsd4_init_slabs(void)
2362 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2363 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2364 if (openowner_slab
== NULL
)
2366 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2367 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2368 if (lockowner_slab
== NULL
)
2370 file_slab
= kmem_cache_create("nfsd4_files",
2371 sizeof(struct nfs4_file
), 0, 0, NULL
);
2372 if (file_slab
== NULL
)
2374 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2375 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2376 if (stateid_slab
== NULL
)
2378 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2379 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2380 if (deleg_slab
== NULL
)
2385 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2389 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2391 kfree(oo
->oo_owner
.so_owner
.data
);
2392 kmem_cache_free(openowner_slab
, oo
);
2395 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2397 kfree(lo
->lo_owner
.so_owner
.data
);
2398 kmem_cache_free(lockowner_slab
, lo
);
2401 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2403 rp
->rp_status
= nfserr_serverfault
;
2405 rp
->rp_buf
= rp
->rp_ibuf
;
2408 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2410 struct nfs4_stateowner
*sop
;
2412 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2416 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2417 if (!sop
->so_owner
.data
) {
2418 kmem_cache_free(slab
, sop
);
2421 sop
->so_owner
.len
= owner
->len
;
2423 INIT_LIST_HEAD(&sop
->so_stateids
);
2424 sop
->so_client
= clp
;
2425 init_nfs4_replay(&sop
->so_replay
);
2429 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2431 list_add(&oo
->oo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2432 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2435 static struct nfs4_openowner
*
2436 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2437 struct nfs4_openowner
*oo
;
2439 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2442 oo
->oo_owner
.so_is_open_owner
= 1;
2443 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2444 oo
->oo_flags
= NFS4_OO_NEW
;
2446 oo
->oo_last_closed_stid
= NULL
;
2447 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2448 hash_openowner(oo
, clp
, strhashval
);
2452 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2453 struct nfs4_openowner
*oo
= open
->op_openowner
;
2454 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2456 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2457 INIT_LIST_HEAD(&stp
->st_lockowners
);
2458 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2459 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2460 stp
->st_stateowner
= &oo
->oo_owner
;
2463 stp
->st_access_bmap
= 0;
2464 stp
->st_deny_bmap
= 0;
2465 set_access(open
->op_share_access
, stp
);
2466 set_deny(open
->op_share_deny
, stp
);
2467 stp
->st_openstp
= NULL
;
2471 move_to_close_lru(struct nfs4_openowner
*oo
)
2473 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2475 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2476 oo
->oo_time
= get_seconds();
2480 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2483 return (sop
->so_owner
.len
== owner
->len
) &&
2484 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2485 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2488 static struct nfs4_openowner
*
2489 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
, bool sessions
)
2491 struct nfs4_stateowner
*so
;
2492 struct nfs4_openowner
*oo
;
2493 struct nfs4_client
*clp
;
2495 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2496 if (!so
->so_is_open_owner
)
2498 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2500 clp
= oo
->oo_owner
.so_client
;
2501 if ((bool)clp
->cl_minorversion
!= sessions
)
2503 renew_client(oo
->oo_owner
.so_client
);
2510 /* search file_hashtbl[] for file */
2511 static struct nfs4_file
*
2512 find_file(struct inode
*ino
)
2514 unsigned int hashval
= file_hashval(ino
);
2515 struct nfs4_file
*fp
;
2517 spin_lock(&recall_lock
);
2518 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2519 if (fp
->fi_inode
== ino
) {
2521 spin_unlock(&recall_lock
);
2525 spin_unlock(&recall_lock
);
2530 * Called to check deny when READ with all zero stateid or
2531 * WRITE with all zero or all one stateid
2534 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2536 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2537 struct nfs4_file
*fp
;
2538 struct nfs4_ol_stateid
*stp
;
2541 dprintk("NFSD: nfs4_share_conflict\n");
2543 fp
= find_file(ino
);
2546 ret
= nfserr_locked
;
2547 /* Search for conflicting share reservations */
2548 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2549 if (test_deny(deny_type
, stp
) ||
2550 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2559 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2561 /* We're assuming the state code never drops its reference
2562 * without first removing the lease. Since we're in this lease
2563 * callback (and since the lease code is serialized by the kernel
2564 * lock) we know the server hasn't removed the lease yet, we know
2565 * it's safe to take a reference: */
2566 atomic_inc(&dp
->dl_count
);
2568 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2570 /* only place dl_time is set. protected by lock_flocks*/
2571 dp
->dl_time
= get_seconds();
2573 nfsd4_cb_recall(dp
);
2576 /* Called from break_lease() with lock_flocks() held. */
2577 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2579 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2580 struct nfs4_delegation
*dp
;
2583 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2586 if (fp
->fi_had_conflict
) {
2587 WARN(1, "duplicate break on %p\n", fp
);
2591 * We don't want the locks code to timeout the lease for us;
2592 * we'll remove it ourself if a delegation isn't returned
2595 fl
->fl_break_time
= 0;
2597 spin_lock(&recall_lock
);
2598 fp
->fi_had_conflict
= true;
2599 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2600 nfsd_break_one_deleg(dp
);
2601 spin_unlock(&recall_lock
);
2605 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2608 return lease_modify(onlist
, arg
);
2613 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2614 .lm_break
= nfsd_break_deleg_cb
,
2615 .lm_change
= nfsd_change_deleg_cb
,
2618 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2620 if (nfsd4_has_session(cstate
))
2622 if (seqid
== so
->so_seqid
- 1)
2623 return nfserr_replay_me
;
2624 if (seqid
== so
->so_seqid
)
2626 return nfserr_bad_seqid
;
2630 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2631 struct nfsd4_open
*open
)
2633 clientid_t
*clientid
= &open
->op_clientid
;
2634 struct nfs4_client
*clp
= NULL
;
2635 unsigned int strhashval
;
2636 struct nfs4_openowner
*oo
= NULL
;
2638 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
2640 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2641 return nfserr_stale_clientid
;
2643 * In case we need it later, after we've already created the
2644 * file and don't want to risk a further failure:
2646 open
->op_file
= nfsd4_alloc_file();
2647 if (open
->op_file
== NULL
)
2648 return nfserr_jukebox
;
2650 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2651 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
);
2652 open
->op_openowner
= oo
;
2654 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2657 return nfserr_expired
;
2660 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2661 /* Replace unconfirmed owners without checking for replay. */
2662 clp
= oo
->oo_owner
.so_client
;
2663 release_openowner(oo
);
2664 open
->op_openowner
= NULL
;
2667 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2670 clp
= oo
->oo_owner
.so_client
;
2673 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2675 return nfserr_jukebox
;
2676 open
->op_openowner
= oo
;
2678 open
->op_stp
= nfs4_alloc_stateid(clp
);
2680 return nfserr_jukebox
;
2684 static inline __be32
2685 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2687 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2688 return nfserr_openmode
;
2693 static int share_access_to_flags(u32 share_access
)
2695 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2698 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2700 struct nfs4_stid
*ret
;
2702 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2705 return delegstateid(ret
);
2708 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2710 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2711 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2715 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2716 struct nfs4_delegation
**dp
)
2719 __be32 status
= nfserr_bad_stateid
;
2721 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2724 flags
= share_access_to_flags(open
->op_share_access
);
2725 status
= nfs4_check_delegmode(*dp
, flags
);
2729 if (!nfsd4_is_deleg_cur(open
))
2733 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2738 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2740 struct nfs4_ol_stateid
*local
;
2741 struct nfs4_openowner
*oo
= open
->op_openowner
;
2743 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2744 /* ignore lock owners */
2745 if (local
->st_stateowner
->so_is_open_owner
== 0)
2747 /* remember if we have seen this open owner */
2748 if (local
->st_stateowner
== &oo
->oo_owner
)
2750 /* check for conflicting share reservations */
2751 if (!test_share(local
, open
))
2752 return nfserr_share_denied
;
2757 static inline int nfs4_access_to_access(u32 nfs4_access
)
2761 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2762 flags
|= NFSD_MAY_READ
;
2763 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2764 flags
|= NFSD_MAY_WRITE
;
2768 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2769 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2772 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2773 int access
= nfs4_access_to_access(open
->op_share_access
);
2775 if (!fp
->fi_fds
[oflag
]) {
2776 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2777 &fp
->fi_fds
[oflag
]);
2781 nfs4_file_get_access(fp
, oflag
);
2786 static inline __be32
2787 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2788 struct nfsd4_open
*open
)
2790 struct iattr iattr
= {
2791 .ia_valid
= ATTR_SIZE
,
2794 if (!open
->op_truncate
)
2796 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2797 return nfserr_inval
;
2798 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2802 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
)
2804 u32 op_share_access
= open
->op_share_access
;
2808 new_access
= !test_access(op_share_access
, stp
);
2810 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2814 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2817 int oflag
= nfs4_access_to_omode(op_share_access
);
2818 nfs4_file_put_access(fp
, oflag
);
2822 /* remember the open */
2823 set_access(op_share_access
, stp
);
2824 set_deny(open
->op_share_deny
, stp
);
2831 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2833 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2836 /* Should we give out recallable state?: */
2837 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2839 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2842 * In the sessions case, since we don't have to establish a
2843 * separate connection for callbacks, we assume it's OK
2844 * until we hear otherwise:
2846 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2849 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2851 struct file_lock
*fl
;
2853 fl
= locks_alloc_lock();
2856 locks_init_lock(fl
);
2857 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2858 fl
->fl_flags
= FL_LEASE
;
2859 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2860 fl
->fl_end
= OFFSET_MAX
;
2861 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2862 fl
->fl_pid
= current
->tgid
;
2866 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2868 struct nfs4_file
*fp
= dp
->dl_file
;
2869 struct file_lock
*fl
;
2872 fl
= nfs4_alloc_init_lease(dp
, flag
);
2875 fl
->fl_file
= find_readable_file(fp
);
2876 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2877 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2879 list_del_init(&dp
->dl_perclnt
);
2880 locks_free_lock(fl
);
2884 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2885 atomic_set(&fp
->fi_delegees
, 1);
2886 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2890 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2892 struct nfs4_file
*fp
= dp
->dl_file
;
2895 return nfs4_setlease(dp
, flag
);
2896 spin_lock(&recall_lock
);
2897 if (fp
->fi_had_conflict
) {
2898 spin_unlock(&recall_lock
);
2901 atomic_inc(&fp
->fi_delegees
);
2902 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2903 spin_unlock(&recall_lock
);
2904 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2908 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2910 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2911 if (status
== -EAGAIN
)
2912 open
->op_why_no_deleg
= WND4_CONTENTION
;
2914 open
->op_why_no_deleg
= WND4_RESOURCE
;
2915 switch (open
->op_deleg_want
) {
2916 case NFS4_SHARE_WANT_READ_DELEG
:
2917 case NFS4_SHARE_WANT_WRITE_DELEG
:
2918 case NFS4_SHARE_WANT_ANY_DELEG
:
2920 case NFS4_SHARE_WANT_CANCEL
:
2921 open
->op_why_no_deleg
= WND4_CANCELLED
;
2923 case NFS4_SHARE_WANT_NO_DELEG
:
2924 BUG(); /* not supposed to get here */
2930 * Attempt to hand out a delegation.
2933 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2934 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2936 struct nfs4_delegation
*dp
;
2937 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2939 int status
= 0, flag
= 0;
2941 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2942 flag
= NFS4_OPEN_DELEGATE_NONE
;
2943 open
->op_recall
= 0;
2944 switch (open
->op_claim_type
) {
2945 case NFS4_OPEN_CLAIM_PREVIOUS
:
2947 open
->op_recall
= 1;
2948 flag
= open
->op_delegate_type
;
2949 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2952 case NFS4_OPEN_CLAIM_NULL
:
2953 /* Let's not give out any delegations till everyone's
2954 * had the chance to reclaim theirs.... */
2955 if (locks_in_grace(net
))
2957 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2959 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2960 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2962 flag
= NFS4_OPEN_DELEGATE_READ
;
2968 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2971 status
= nfs4_set_delegation(dp
, flag
);
2975 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2977 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2978 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2980 open
->op_delegate_type
= flag
;
2981 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2982 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2983 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2984 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2986 /* 4.1 client asking for a delegation? */
2987 if (open
->op_deleg_want
)
2988 nfsd4_open_deleg_none_ext(open
, status
);
2992 nfs4_put_delegation(dp
);
2994 flag
= NFS4_OPEN_DELEGATE_NONE
;
2998 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2999 struct nfs4_delegation
*dp
)
3001 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3002 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3003 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3004 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3005 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3006 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3007 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3008 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3010 /* Otherwise the client must be confused wanting a delegation
3011 * it already has, therefore we don't return
3012 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3017 * called with nfs4_lock_state() held.
3020 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3022 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3023 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3024 struct nfs4_file
*fp
= NULL
;
3025 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3026 struct nfs4_ol_stateid
*stp
= NULL
;
3027 struct nfs4_delegation
*dp
= NULL
;
3031 * Lookup file; if found, lookup stateid and check open request,
3032 * and check for delegations in the process of being recalled.
3033 * If not found, create the nfs4_file struct
3035 fp
= find_file(ino
);
3037 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3039 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3043 status
= nfserr_bad_stateid
;
3044 if (nfsd4_is_deleg_cur(open
))
3046 status
= nfserr_jukebox
;
3048 open
->op_file
= NULL
;
3049 nfsd4_init_file(fp
, ino
);
3053 * OPEN the file, or upgrade an existing OPEN.
3054 * If truncate fails, the OPEN fails.
3057 /* Stateid was found, this is an OPEN upgrade */
3058 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3062 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3065 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3069 open
->op_stp
= NULL
;
3070 init_open_stateid(stp
, fp
, open
);
3072 update_stateid(&stp
->st_stid
.sc_stateid
);
3073 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3075 if (nfsd4_has_session(&resp
->cstate
)) {
3076 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3078 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3079 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3080 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3086 * Attempt to hand out a delegation. No error return, because the
3087 * OPEN succeeds even if we fail.
3089 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3093 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3094 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3096 /* 4.1 client trying to upgrade/downgrade delegation? */
3097 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3098 open
->op_deleg_want
)
3099 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3103 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3104 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3106 * To finish the open response, we just need to set the rflags.
3108 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3109 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3110 !nfsd4_has_session(&resp
->cstate
))
3111 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3116 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3118 if (open
->op_openowner
) {
3119 struct nfs4_openowner
*oo
= open
->op_openowner
;
3121 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3122 list_del_init(&oo
->oo_close_lru
);
3123 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3125 release_openowner(oo
);
3126 open
->op_openowner
= NULL
;
3128 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3132 nfsd4_free_file(open
->op_file
);
3134 free_generic_stateid(open
->op_stp
);
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
= nfserr_stale_clientid
;
3149 if (STALE_CLIENTID(clid
, nn
))
3151 clp
= find_confirmed_client(clid
, cstate
->minorversion
, nn
);
3152 status
= nfserr_expired
;
3154 /* We assume the client took too long to RENEW. */
3155 dprintk("nfsd4_renew: clientid not found!\n");
3158 status
= nfserr_cb_path_down
;
3159 if (!list_empty(&clp
->cl_delegations
)
3160 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3164 nfs4_unlock_state();
3169 nfsd4_end_grace(struct net
*net
)
3171 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3173 /* do nothing if grace period already ended */
3174 if (nn
->grace_ended
)
3177 dprintk("NFSD: end of grace period\n");
3178 nn
->grace_ended
= true;
3179 nfsd4_record_grace_done(net
, nn
->boot_time
);
3180 locks_end_grace(&nn
->nfsd4_manager
);
3182 * Now that every NFSv4 client has had the chance to recover and
3183 * to see the (possibly new, possibly shorter) lease time, we
3184 * can safely set the next grace time to the current lease time:
3186 nfsd4_grace
= nfsd4_lease
;
3190 nfs4_laundromat(void)
3192 struct nfs4_client
*clp
;
3193 struct nfs4_openowner
*oo
;
3194 struct nfs4_delegation
*dp
;
3195 struct list_head
*pos
, *next
, reaplist
;
3196 time_t cutoff
= get_seconds() - nfsd4_lease
;
3197 time_t t
, clientid_val
= nfsd4_lease
;
3198 time_t u
, test_val
= nfsd4_lease
;
3202 dprintk("NFSD: laundromat service - starting\n");
3203 nfsd4_end_grace(&init_net
);
3204 INIT_LIST_HEAD(&reaplist
);
3205 spin_lock(&client_lock
);
3206 list_for_each_safe(pos
, next
, &client_lru
) {
3207 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3208 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3209 t
= clp
->cl_time
- cutoff
;
3210 if (clientid_val
> t
)
3214 if (atomic_read(&clp
->cl_refcount
)) {
3215 dprintk("NFSD: client in use (clientid %08x)\n",
3216 clp
->cl_clientid
.cl_id
);
3219 unhash_client_locked(clp
);
3220 list_add(&clp
->cl_lru
, &reaplist
);
3222 spin_unlock(&client_lock
);
3223 list_for_each_safe(pos
, next
, &reaplist
) {
3224 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3225 dprintk("NFSD: purging unused client (clientid %08x)\n",
3226 clp
->cl_clientid
.cl_id
);
3229 spin_lock(&recall_lock
);
3230 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3231 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3232 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3233 u
= dp
->dl_time
- cutoff
;
3238 list_move(&dp
->dl_recall_lru
, &reaplist
);
3240 spin_unlock(&recall_lock
);
3241 list_for_each_safe(pos
, next
, &reaplist
) {
3242 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3243 unhash_delegation(dp
);
3245 test_val
= nfsd4_lease
;
3246 list_for_each_safe(pos
, next
, &close_lru
) {
3247 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3248 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3249 u
= oo
->oo_time
- cutoff
;
3254 release_openowner(oo
);
3256 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3257 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3258 nfs4_unlock_state();
3259 return clientid_val
;
3262 static struct workqueue_struct
*laundry_wq
;
3263 static void laundromat_main(struct work_struct
*);
3264 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3267 laundromat_main(struct work_struct
*not_used
)
3271 t
= nfs4_laundromat();
3272 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3273 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3276 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3278 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3279 return nfserr_bad_stateid
;
3284 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3286 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3288 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3289 STATEID_VAL(stateid
));
3294 access_permit_read(struct nfs4_ol_stateid
*stp
)
3296 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3297 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3298 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3302 access_permit_write(struct nfs4_ol_stateid
*stp
)
3304 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3305 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3309 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3311 __be32 status
= nfserr_openmode
;
3313 /* For lock stateid's, we test the parent open, not the lock: */
3314 if (stp
->st_openstp
)
3315 stp
= stp
->st_openstp
;
3316 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3318 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3325 static inline __be32
3326 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3328 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3330 else if (locks_in_grace(net
)) {
3331 /* Answer in remaining cases depends on existence of
3332 * conflicting state; so we must wait out the grace period. */
3333 return nfserr_grace
;
3334 } else if (flags
& WR_STATE
)
3335 return nfs4_share_conflict(current_fh
,
3336 NFS4_SHARE_DENY_WRITE
);
3337 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3338 return nfs4_share_conflict(current_fh
,
3339 NFS4_SHARE_DENY_READ
);
3343 * Allow READ/WRITE during grace period on recovered state only for files
3344 * that are not able to provide mandatory locking.
3347 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3349 return locks_in_grace(net
) && mandatory_lock(inode
);
3352 /* Returns true iff a is later than b: */
3353 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3355 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3358 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3361 * When sessions are used the stateid generation number is ignored
3364 if (has_session
&& in
->si_generation
== 0)
3367 if (in
->si_generation
== ref
->si_generation
)
3370 /* If the client sends us a stateid from the future, it's buggy: */
3371 if (stateid_generation_after(in
, ref
))
3372 return nfserr_bad_stateid
;
3374 * However, we could see a stateid from the past, even from a
3375 * non-buggy client. For example, if the client sends a lock
3376 * while some IO is outstanding, the lock may bump si_generation
3377 * while the IO is still in flight. The client could avoid that
3378 * situation by waiting for responses on all the IO requests,
3379 * but better performance may result in retrying IO that
3380 * receives an old_stateid error if requests are rarely
3381 * reordered in flight:
3383 return nfserr_old_stateid
;
3386 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3388 struct nfs4_stid
*s
;
3389 struct nfs4_ol_stateid
*ols
;
3392 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3393 return nfserr_bad_stateid
;
3394 /* Client debugging aid. */
3395 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3396 char addr_str
[INET6_ADDRSTRLEN
];
3397 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3399 pr_warn_ratelimited("NFSD: client %s testing state ID "
3400 "with incorrect client ID\n", addr_str
);
3401 return nfserr_bad_stateid
;
3403 s
= find_stateid(cl
, stateid
);
3405 return nfserr_bad_stateid
;
3406 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3409 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3411 ols
= openlockstateid(s
);
3412 if (ols
->st_stateowner
->so_is_open_owner
3413 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3414 return nfserr_bad_stateid
;
3418 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
, bool sessions
)
3420 struct nfs4_client
*cl
;
3421 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
3423 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3424 return nfserr_bad_stateid
;
3425 if (STALE_STATEID(stateid
, nn
))
3426 return nfserr_stale_stateid
;
3427 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
, sessions
, nn
);
3429 return nfserr_expired
;
3430 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3432 return nfserr_bad_stateid
;
3438 * Checks for stateid operations
3441 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3442 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3444 struct nfs4_stid
*s
;
3445 struct nfs4_ol_stateid
*stp
= NULL
;
3446 struct nfs4_delegation
*dp
= NULL
;
3447 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3448 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3454 if (grace_disallows_io(net
, ino
))
3455 return nfserr_grace
;
3457 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3458 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3460 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
, cstate
->minorversion
);
3463 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3466 switch (s
->sc_type
) {
3467 case NFS4_DELEG_STID
:
3468 dp
= delegstateid(s
);
3469 status
= nfs4_check_delegmode(dp
, flags
);
3473 *filpp
= dp
->dl_file
->fi_deleg_file
;
3477 case NFS4_OPEN_STID
:
3478 case NFS4_LOCK_STID
:
3479 stp
= openlockstateid(s
);
3480 status
= nfs4_check_fh(current_fh
, stp
);
3483 if (stp
->st_stateowner
->so_is_open_owner
3484 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3486 status
= nfs4_check_openmode(stp
, flags
);
3490 if (flags
& RD_STATE
)
3491 *filpp
= find_readable_file(stp
->st_file
);
3493 *filpp
= find_writeable_file(stp
->st_file
);
3497 return nfserr_bad_stateid
;
3505 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3507 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3508 return nfserr_locks_held
;
3509 release_lock_stateid(stp
);
3514 * Test if the stateid is valid
3517 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3518 struct nfsd4_test_stateid
*test_stateid
)
3520 struct nfsd4_test_stateid_id
*stateid
;
3521 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3524 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3525 stateid
->ts_id_status
=
3526 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3527 nfs4_unlock_state();
3533 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3534 struct nfsd4_free_stateid
*free_stateid
)
3536 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3537 struct nfs4_stid
*s
;
3538 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3539 __be32 ret
= nfserr_bad_stateid
;
3542 s
= find_stateid(cl
, stateid
);
3545 switch (s
->sc_type
) {
3546 case NFS4_DELEG_STID
:
3547 ret
= nfserr_locks_held
;
3549 case NFS4_OPEN_STID
:
3550 case NFS4_LOCK_STID
:
3551 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3554 if (s
->sc_type
== NFS4_LOCK_STID
)
3555 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3557 ret
= nfserr_locks_held
;
3560 ret
= nfserr_bad_stateid
;
3563 nfs4_unlock_state();
3570 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3571 RD_STATE
: WR_STATE
;
3574 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3576 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3577 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3580 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3583 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3585 * "Closed" stateid's exist *only* to return
3586 * nfserr_replay_me from the previous step.
3588 return nfserr_bad_stateid
;
3589 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3592 return nfs4_check_fh(current_fh
, stp
);
3596 * Checks for sequence id mutating operations.
3599 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3600 stateid_t
*stateid
, char typemask
,
3601 struct nfs4_ol_stateid
**stpp
)
3604 struct nfs4_stid
*s
;
3606 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3607 seqid
, STATEID_VAL(stateid
));
3610 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
, cstate
->minorversion
);
3613 *stpp
= openlockstateid(s
);
3614 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3616 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3619 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3622 struct nfs4_openowner
*oo
;
3624 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3625 NFS4_OPEN_STID
, stpp
);
3628 oo
= openowner((*stpp
)->st_stateowner
);
3629 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3630 return nfserr_bad_stateid
;
3635 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3636 struct nfsd4_open_confirm
*oc
)
3639 struct nfs4_openowner
*oo
;
3640 struct nfs4_ol_stateid
*stp
;
3642 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3643 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3644 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3646 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3652 status
= nfs4_preprocess_seqid_op(cstate
,
3653 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3654 NFS4_OPEN_STID
, &stp
);
3657 oo
= openowner(stp
->st_stateowner
);
3658 status
= nfserr_bad_stateid
;
3659 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3661 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3662 update_stateid(&stp
->st_stid
.sc_stateid
);
3663 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3664 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3665 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3667 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3670 if (!cstate
->replay_owner
)
3671 nfs4_unlock_state();
3675 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3677 if (!test_access(access
, stp
))
3679 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3680 clear_access(access
, stp
);
3683 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3685 switch (to_access
) {
3686 case NFS4_SHARE_ACCESS_READ
:
3687 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3688 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3690 case NFS4_SHARE_ACCESS_WRITE
:
3691 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3692 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3694 case NFS4_SHARE_ACCESS_BOTH
:
3702 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3705 for (i
= 0; i
< 4; i
++) {
3706 if ((i
& deny
) != i
)
3712 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3713 struct nfsd4_compound_state
*cstate
,
3714 struct nfsd4_open_downgrade
*od
)
3717 struct nfs4_ol_stateid
*stp
;
3719 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3720 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3721 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3723 /* We don't yet support WANT bits: */
3724 if (od
->od_deleg_want
)
3725 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3729 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3730 &od
->od_stateid
, &stp
);
3733 status
= nfserr_inval
;
3734 if (!test_access(od
->od_share_access
, stp
)) {
3735 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3736 stp
->st_access_bmap
, od
->od_share_access
);
3739 if (!test_deny(od
->od_share_deny
, stp
)) {
3740 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3741 stp
->st_deny_bmap
, od
->od_share_deny
);
3744 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3746 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3748 update_stateid(&stp
->st_stid
.sc_stateid
);
3749 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3752 if (!cstate
->replay_owner
)
3753 nfs4_unlock_state();
3757 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3759 struct nfs4_openowner
*oo
;
3760 struct nfs4_ol_stateid
*s
;
3762 if (!so
->so_is_open_owner
)
3765 s
= oo
->oo_last_closed_stid
;
3768 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3769 /* Release the last_closed_stid on the next seqid bump: */
3770 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3773 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3774 release_last_closed_stateid(oo
);
3777 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3779 unhash_open_stateid(s
);
3780 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3784 * nfs4_unlock_state() called after encode
3787 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3788 struct nfsd4_close
*close
)
3791 struct nfs4_openowner
*oo
;
3792 struct nfs4_ol_stateid
*stp
;
3794 dprintk("NFSD: nfsd4_close on file %.*s\n",
3795 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3796 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3799 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3801 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3805 oo
= openowner(stp
->st_stateowner
);
3807 update_stateid(&stp
->st_stid
.sc_stateid
);
3808 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3810 nfsd4_close_open_stateid(stp
);
3811 release_last_closed_stateid(oo
);
3812 oo
->oo_last_closed_stid
= stp
;
3814 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3815 if (cstate
->minorversion
) {
3816 release_openowner(oo
);
3817 cstate
->replay_owner
= NULL
;
3820 * In the 4.0 case we need to keep the owners around a
3821 * little while to handle CLOSE replay.
3823 if (list_empty(&oo
->oo_owner
.so_stateids
))
3824 move_to_close_lru(oo
);
3828 if (!cstate
->replay_owner
)
3829 nfs4_unlock_state();
3834 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3835 struct nfsd4_delegreturn
*dr
)
3837 struct nfs4_delegation
*dp
;
3838 stateid_t
*stateid
= &dr
->dr_stateid
;
3839 struct nfs4_stid
*s
;
3842 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3846 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
, cstate
->minorversion
);
3849 dp
= delegstateid(s
);
3850 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3854 unhash_delegation(dp
);
3856 nfs4_unlock_state();
3862 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3864 #define LOCKOWNER_INO_HASH_BITS 8
3865 #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
3866 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3869 end_offset(u64 start
, u64 len
)
3874 return end
>= start
? end
: NFS4_MAX_UINT64
;
3877 /* last octet in a range */
3879 last_byte_offset(u64 start
, u64 len
)
3885 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3888 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3890 return (file_hashval(inode
) + cl_id
3891 + opaque_hashval(ownername
->data
, ownername
->len
))
3892 & LOCKOWNER_INO_HASH_MASK
;
3895 static struct list_head lockowner_ino_hashtbl
[LOCKOWNER_INO_HASH_SIZE
];
3898 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3899 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3900 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3901 * locking, this prevents us from being completely protocol-compliant. The
3902 * real solution to this problem is to start using unsigned file offsets in
3903 * the VFS, but this is a very deep change!
3906 nfs4_transform_lock_offset(struct file_lock
*lock
)
3908 if (lock
->fl_start
< 0)
3909 lock
->fl_start
= OFFSET_MAX
;
3910 if (lock
->fl_end
< 0)
3911 lock
->fl_end
= OFFSET_MAX
;
3914 /* Hack!: For now, we're defining this just so we can use a pointer to it
3915 * as a unique cookie to identify our (NFSv4's) posix locks. */
3916 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3920 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3922 struct nfs4_lockowner
*lo
;
3924 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3925 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3926 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3927 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3928 if (!deny
->ld_owner
.data
)
3929 /* We just don't care that much */
3931 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3932 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3935 deny
->ld_owner
.len
= 0;
3936 deny
->ld_owner
.data
= NULL
;
3937 deny
->ld_clientid
.cl_boot
= 0;
3938 deny
->ld_clientid
.cl_id
= 0;
3940 deny
->ld_start
= fl
->fl_start
;
3941 deny
->ld_length
= NFS4_MAX_UINT64
;
3942 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3943 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3944 deny
->ld_type
= NFS4_READ_LT
;
3945 if (fl
->fl_type
!= F_RDLCK
)
3946 deny
->ld_type
= NFS4_WRITE_LT
;
3949 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3951 struct nfs4_ol_stateid
*lst
;
3953 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3955 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3956 struct nfs4_ol_stateid
, st_perstateowner
);
3957 return lst
->st_file
->fi_inode
== inode
;
3960 static struct nfs4_lockowner
*
3961 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3962 struct xdr_netobj
*owner
)
3964 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3965 struct nfs4_lockowner
*lo
;
3967 list_for_each_entry(lo
, &lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3968 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3974 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3976 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3977 unsigned int inohash
= lockowner_ino_hashval(inode
,
3978 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3980 list_add(&lo
->lo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
3981 list_add(&lo
->lo_owner_ino_hash
, &lockowner_ino_hashtbl
[inohash
]);
3982 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3986 * Alloc a lock owner structure.
3987 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3990 * strhashval = ownerstr_hashval
3993 static struct nfs4_lockowner
*
3994 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3995 struct nfs4_lockowner
*lo
;
3997 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4000 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4001 lo
->lo_owner
.so_is_open_owner
= 0;
4002 /* It is the openowner seqid that will be incremented in encode in the
4003 * case of new lockowners; so increment the lock seqid manually: */
4004 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4005 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4009 static struct nfs4_ol_stateid
*
4010 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4012 struct nfs4_ol_stateid
*stp
;
4013 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4015 stp
= nfs4_alloc_stateid(clp
);
4018 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
4019 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4020 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4021 stp
->st_stateowner
= &lo
->lo_owner
;
4024 stp
->st_access_bmap
= 0;
4025 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4026 stp
->st_openstp
= open_stp
;
4031 check_lock_length(u64 offset
, u64 length
)
4033 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4034 LOFF_OVERFLOW(offset
, length
)));
4037 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4039 struct nfs4_file
*fp
= lock_stp
->st_file
;
4040 int oflag
= nfs4_access_to_omode(access
);
4042 if (test_access(access
, lock_stp
))
4044 nfs4_file_get_access(fp
, oflag
);
4045 set_access(access
, lock_stp
);
4048 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)
4050 struct nfs4_file
*fi
= ost
->st_file
;
4051 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4052 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4053 struct nfs4_lockowner
*lo
;
4054 unsigned int strhashval
;
4056 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
, &lock
->v
.new.owner
);
4058 if (!cstate
->minorversion
)
4059 return nfserr_bad_seqid
;
4060 /* XXX: a lockowner always has exactly one stateid: */
4061 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4062 struct nfs4_ol_stateid
, st_perstateowner
);
4065 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4066 &lock
->v
.new.owner
);
4067 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4069 return nfserr_jukebox
;
4070 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4072 release_lockowner(lo
);
4073 return nfserr_jukebox
;
4083 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4084 struct nfsd4_lock
*lock
)
4086 struct nfs4_openowner
*open_sop
= NULL
;
4087 struct nfs4_lockowner
*lock_sop
= NULL
;
4088 struct nfs4_ol_stateid
*lock_stp
;
4089 struct file
*filp
= NULL
;
4090 struct file_lock
*file_lock
= NULL
;
4091 struct file_lock
*conflock
= NULL
;
4093 bool new_state
= false;
4096 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4098 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4099 (long long) lock
->lk_offset
,
4100 (long long) lock
->lk_length
);
4102 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4103 return nfserr_inval
;
4105 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4106 S_IFREG
, NFSD_MAY_LOCK
))) {
4107 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4113 if (lock
->lk_is_new
) {
4114 struct nfs4_ol_stateid
*open_stp
= NULL
;
4116 if (nfsd4_has_session(cstate
))
4117 /* See rfc 5661 18.10.3: given clientid is ignored: */
4118 memcpy(&lock
->v
.new.clientid
,
4119 &cstate
->session
->se_client
->cl_clientid
,
4120 sizeof(clientid_t
));
4122 status
= nfserr_stale_clientid
;
4123 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4126 /* validate and update open stateid and open seqid */
4127 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4128 lock
->lk_new_open_seqid
,
4129 &lock
->lk_new_open_stateid
,
4133 open_sop
= openowner(open_stp
->st_stateowner
);
4134 status
= nfserr_bad_stateid
;
4135 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4136 &lock
->v
.new.clientid
))
4138 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4139 &lock_stp
, &new_state
);
4141 status
= nfs4_preprocess_seqid_op(cstate
,
4142 lock
->lk_old_lock_seqid
,
4143 &lock
->lk_old_lock_stateid
,
4144 NFS4_LOCK_STID
, &lock_stp
);
4147 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4149 lkflg
= setlkflg(lock
->lk_type
);
4150 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4154 status
= nfserr_grace
;
4155 if (locks_in_grace(SVC_NET(rqstp
)) && !lock
->lk_reclaim
)
4157 status
= nfserr_no_grace
;
4158 if (!locks_in_grace(SVC_NET(rqstp
)) && lock
->lk_reclaim
)
4161 file_lock
= locks_alloc_lock();
4163 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4164 status
= nfserr_jukebox
;
4168 locks_init_lock(file_lock
);
4169 switch (lock
->lk_type
) {
4172 filp
= find_readable_file(lock_stp
->st_file
);
4174 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4175 file_lock
->fl_type
= F_RDLCK
;
4178 case NFS4_WRITEW_LT
:
4179 filp
= find_writeable_file(lock_stp
->st_file
);
4181 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4182 file_lock
->fl_type
= F_WRLCK
;
4185 status
= nfserr_inval
;
4189 status
= nfserr_openmode
;
4192 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4193 file_lock
->fl_pid
= current
->tgid
;
4194 file_lock
->fl_file
= filp
;
4195 file_lock
->fl_flags
= FL_POSIX
;
4196 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4197 file_lock
->fl_start
= lock
->lk_offset
;
4198 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4199 nfs4_transform_lock_offset(file_lock
);
4201 conflock
= locks_alloc_lock();
4203 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4204 status
= nfserr_jukebox
;
4208 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4210 case 0: /* success! */
4211 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4212 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4216 case (EAGAIN
): /* conflock holds conflicting lock */
4217 status
= nfserr_denied
;
4218 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4219 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4222 status
= nfserr_deadlock
;
4225 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4226 status
= nfserrno(err
);
4230 if (status
&& new_state
)
4231 release_lockowner(lock_sop
);
4232 if (!cstate
->replay_owner
)
4233 nfs4_unlock_state();
4235 locks_free_lock(file_lock
);
4237 locks_free_lock(conflock
);
4242 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4243 * so we do a temporary open here just to get an open file to pass to
4244 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4247 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4250 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4252 err
= nfserrno(vfs_test_lock(file
, lock
));
4262 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4263 struct nfsd4_lockt
*lockt
)
4265 struct inode
*inode
;
4266 struct file_lock
*file_lock
= NULL
;
4267 struct nfs4_lockowner
*lo
;
4269 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4271 if (locks_in_grace(SVC_NET(rqstp
)))
4272 return nfserr_grace
;
4274 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4275 return nfserr_inval
;
4279 status
= nfserr_stale_clientid
;
4280 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
, nn
))
4283 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4286 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4287 file_lock
= locks_alloc_lock();
4289 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4290 status
= nfserr_jukebox
;
4293 locks_init_lock(file_lock
);
4294 switch (lockt
->lt_type
) {
4297 file_lock
->fl_type
= F_RDLCK
;
4300 case NFS4_WRITEW_LT
:
4301 file_lock
->fl_type
= F_WRLCK
;
4304 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4305 status
= nfserr_inval
;
4309 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4311 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4312 file_lock
->fl_pid
= current
->tgid
;
4313 file_lock
->fl_flags
= FL_POSIX
;
4315 file_lock
->fl_start
= lockt
->lt_offset
;
4316 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4318 nfs4_transform_lock_offset(file_lock
);
4320 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4324 if (file_lock
->fl_type
!= F_UNLCK
) {
4325 status
= nfserr_denied
;
4326 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4329 nfs4_unlock_state();
4331 locks_free_lock(file_lock
);
4336 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4337 struct nfsd4_locku
*locku
)
4339 struct nfs4_ol_stateid
*stp
;
4340 struct file
*filp
= NULL
;
4341 struct file_lock
*file_lock
= NULL
;
4345 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4346 (long long) locku
->lu_offset
,
4347 (long long) locku
->lu_length
);
4349 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4350 return nfserr_inval
;
4354 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4355 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4358 filp
= find_any_file(stp
->st_file
);
4360 status
= nfserr_lock_range
;
4363 file_lock
= locks_alloc_lock();
4365 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4366 status
= nfserr_jukebox
;
4369 locks_init_lock(file_lock
);
4370 file_lock
->fl_type
= F_UNLCK
;
4371 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4372 file_lock
->fl_pid
= current
->tgid
;
4373 file_lock
->fl_file
= filp
;
4374 file_lock
->fl_flags
= FL_POSIX
;
4375 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4376 file_lock
->fl_start
= locku
->lu_offset
;
4378 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4380 nfs4_transform_lock_offset(file_lock
);
4383 * Try to unlock the file in the VFS.
4385 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4387 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4391 * OK, unlock succeeded; the only thing left to do is update the stateid.
4393 update_stateid(&stp
->st_stid
.sc_stateid
);
4394 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4397 if (!cstate
->replay_owner
)
4398 nfs4_unlock_state();
4400 locks_free_lock(file_lock
);
4404 status
= nfserrno(err
);
4410 * 1: locks held by lockowner
4411 * 0: no locks held by lockowner
4414 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4416 struct file_lock
**flpp
;
4417 struct inode
*inode
= filp
->fi_inode
;
4421 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4422 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4433 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4434 struct nfsd4_compound_state
*cstate
,
4435 struct nfsd4_release_lockowner
*rlockowner
)
4437 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4438 struct nfs4_stateowner
*sop
;
4439 struct nfs4_lockowner
*lo
;
4440 struct nfs4_ol_stateid
*stp
;
4441 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4442 struct list_head matches
;
4443 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4445 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4447 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4448 clid
->cl_boot
, clid
->cl_id
);
4450 /* XXX check for lease expiration */
4452 status
= nfserr_stale_clientid
;
4453 if (STALE_CLIENTID(clid
, nn
))
4458 status
= nfserr_locks_held
;
4459 INIT_LIST_HEAD(&matches
);
4461 list_for_each_entry(sop
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
4462 if (sop
->so_is_open_owner
)
4464 if (!same_owner_str(sop
, owner
, clid
))
4466 list_for_each_entry(stp
, &sop
->so_stateids
,
4468 lo
= lockowner(sop
);
4469 if (check_for_locks(stp
->st_file
, lo
))
4471 list_add(&lo
->lo_list
, &matches
);
4474 /* Clients probably won't expect us to return with some (but not all)
4475 * of the lockowner state released; so don't release any until all
4476 * have been checked. */
4478 while (!list_empty(&matches
)) {
4479 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4481 /* unhash_stateowner deletes so_perclient only
4482 * for openowners. */
4483 list_del(&lo
->lo_list
);
4484 release_lockowner(lo
);
4487 nfs4_unlock_state();
4491 static inline struct nfs4_client_reclaim
*
4494 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4498 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4500 struct nfs4_client_reclaim
*crp
;
4502 crp
= nfsd4_find_reclaim_client(name
, nn
);
4503 return (crp
&& crp
->cr_clp
);
4507 * failure => all reset bets are off, nfserr_no_grace...
4509 struct nfs4_client_reclaim
*
4510 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4512 unsigned int strhashval
;
4513 struct nfs4_client_reclaim
*crp
;
4515 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4516 crp
= alloc_reclaim();
4518 strhashval
= clientstr_hashval(name
);
4519 INIT_LIST_HEAD(&crp
->cr_strhash
);
4520 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4521 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4523 nn
->reclaim_str_hashtbl_size
++;
4529 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4531 list_del(&crp
->cr_strhash
);
4533 nn
->reclaim_str_hashtbl_size
--;
4537 nfs4_release_reclaim(struct nfsd_net
*nn
)
4539 struct nfs4_client_reclaim
*crp
= NULL
;
4542 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4543 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4544 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4545 struct nfs4_client_reclaim
, cr_strhash
);
4546 nfs4_remove_reclaim_record(crp
, nn
);
4549 BUG_ON(nn
->reclaim_str_hashtbl_size
);
4553 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4554 struct nfs4_client_reclaim
*
4555 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4557 unsigned int strhashval
;
4558 struct nfs4_client_reclaim
*crp
= NULL
;
4560 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4562 strhashval
= clientstr_hashval(recdir
);
4563 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4564 if (same_name(crp
->cr_recdir
, recdir
)) {
4572 * Called from OPEN. Look for clientid in reclaim list.
4575 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
)
4577 struct nfs4_client
*clp
;
4578 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4580 /* find clientid in conf_id_hashtbl */
4581 clp
= find_confirmed_client(clid
, sessions
, nn
);
4583 return nfserr_reclaim_bad
;
4585 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4588 #ifdef CONFIG_NFSD_FAULT_INJECTION
4590 void nfsd_forget_clients(u64 num
)
4592 struct nfs4_client
*clp
, *next
;
4596 list_for_each_entry_safe(clp
, next
, &client_lru
, cl_lru
) {
4601 nfs4_unlock_state();
4603 printk(KERN_INFO
"NFSD: Forgot %d clients", count
);
4606 static void release_lockowner_sop(struct nfs4_stateowner
*sop
)
4608 release_lockowner(lockowner(sop
));
4611 static void release_openowner_sop(struct nfs4_stateowner
*sop
)
4613 release_openowner(openowner(sop
));
4616 static int nfsd_release_n_owners(u64 num
, bool is_open_owner
,
4617 void (*release_sop
)(struct nfs4_stateowner
*))
4620 struct nfs4_stateowner
*sop
, *next
;
4622 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4623 list_for_each_entry_safe(sop
, next
, &ownerstr_hashtbl
[i
], so_strhash
) {
4624 if (sop
->so_is_open_owner
!= is_open_owner
)
4634 void nfsd_forget_locks(u64 num
)
4639 count
= nfsd_release_n_owners(num
, false, release_lockowner_sop
);
4640 nfs4_unlock_state();
4642 printk(KERN_INFO
"NFSD: Forgot %d locks", count
);
4645 void nfsd_forget_openowners(u64 num
)
4650 count
= nfsd_release_n_owners(num
, true, release_openowner_sop
);
4651 nfs4_unlock_state();
4653 printk(KERN_INFO
"NFSD: Forgot %d open owners", count
);
4656 static int nfsd_process_n_delegations(u64 num
, struct list_head
*list
)
4659 struct nfs4_file
*fp
, *fnext
;
4660 struct nfs4_delegation
*dp
, *dnext
;
4662 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4663 list_for_each_entry_safe(fp
, fnext
, &file_hashtbl
[i
], fi_hash
) {
4664 list_for_each_entry_safe(dp
, dnext
, &fp
->fi_delegations
, dl_perfile
) {
4665 list_move(&dp
->dl_recall_lru
, list
);
4675 void nfsd_forget_delegations(u64 num
)
4679 struct nfs4_delegation
*dp
, *dnext
;
4681 spin_lock(&recall_lock
);
4682 count
= nfsd_process_n_delegations(num
, &victims
);
4683 spin_unlock(&recall_lock
);
4686 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
)
4687 unhash_delegation(dp
);
4688 nfs4_unlock_state();
4690 printk(KERN_INFO
"NFSD: Forgot %d delegations", count
);
4693 void nfsd_recall_delegations(u64 num
)
4697 struct nfs4_delegation
*dp
, *dnext
;
4699 spin_lock(&recall_lock
);
4700 count
= nfsd_process_n_delegations(num
, &victims
);
4701 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
) {
4702 list_del(&dp
->dl_recall_lru
);
4703 nfsd_break_one_deleg(dp
);
4705 spin_unlock(&recall_lock
);
4707 printk(KERN_INFO
"NFSD: Recalled %d delegations", count
);
4710 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4712 /* initialization to perform at module load time: */
4715 nfs4_state_init(void)
4719 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4720 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4721 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4722 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4724 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4725 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4727 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4728 INIT_LIST_HEAD(&lockowner_ino_hashtbl
[i
]);
4729 INIT_LIST_HEAD(&close_lru
);
4730 INIT_LIST_HEAD(&client_lru
);
4731 INIT_LIST_HEAD(&del_recall_lru
);
4735 * Since the lifetime of a delegation isn't limited to that of an open, a
4736 * client may quite reasonably hang on to a delegation as long as it has
4737 * the inode cached. This becomes an obvious problem the first time a
4738 * client's inode cache approaches the size of the server's total memory.
4740 * For now we avoid this problem by imposing a hard limit on the number
4741 * of delegations, which varies according to the server's memory size.
4744 set_max_delegations(void)
4747 * Allow at most 4 delegations per megabyte of RAM. Quick
4748 * estimates suggest that in the worst case (where every delegation
4749 * is for a different inode), a delegation could take about 1.5K,
4750 * giving a worst case usage of about 6% of memory.
4752 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4755 static int nfs4_state_start_net(struct net
*net
)
4757 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4760 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4761 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4762 if (!nn
->conf_id_hashtbl
)
4764 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4765 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4766 if (!nn
->unconf_id_hashtbl
)
4769 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4770 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4771 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4773 nn
->conf_name_tree
= RB_ROOT
;
4774 nn
->unconf_name_tree
= RB_ROOT
;
4779 kfree(nn
->conf_id_hashtbl
);
4785 __nfs4_state_shutdown_net(struct net
*net
)
4788 struct nfs4_client
*clp
= NULL
;
4789 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4790 struct rb_node
*node
, *tmp
;
4792 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4793 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4794 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4795 destroy_client(clp
);
4799 node
= rb_first(&nn
->unconf_name_tree
);
4800 while (node
!= NULL
) {
4802 node
= rb_next(tmp
);
4803 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4804 rb_erase(tmp
, &nn
->unconf_name_tree
);
4805 destroy_client(clp
);
4808 kfree(nn
->unconf_id_hashtbl
);
4809 kfree(nn
->conf_id_hashtbl
);
4812 /* initialization to perform when the nfsd service is started: */
4815 nfs4_state_start(void)
4817 struct net
*net
= &init_net
;
4818 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4822 * FIXME: For now, we hang most of the pernet global stuff off of
4823 * init_net until nfsd is fully containerized. Eventually, we'll
4824 * need to pass a net pointer into this function, take a reference
4825 * to that instead and then do most of the rest of this on a per-net
4829 ret
= nfs4_state_start_net(net
);
4832 nfsd4_client_tracking_init(net
);
4833 nn
->boot_time
= get_seconds();
4834 locks_start_grace(net
, &nn
->nfsd4_manager
);
4835 nn
->grace_ended
= false;
4836 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4838 ret
= set_callback_cred();
4843 laundry_wq
= create_singlethread_workqueue("nfsd4");
4844 if (laundry_wq
== NULL
) {
4848 ret
= nfsd4_create_callback_queue();
4850 goto out_free_laundry
;
4851 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4852 set_max_delegations();
4855 destroy_workqueue(laundry_wq
);
4857 nfsd4_client_tracking_exit(net
);
4858 __nfs4_state_shutdown_net(net
);
4863 /* should be called with the state lock held */
4865 __nfs4_state_shutdown(struct net
*net
)
4867 struct nfs4_delegation
*dp
= NULL
;
4868 struct list_head
*pos
, *next
, reaplist
;
4870 __nfs4_state_shutdown_net(net
);
4872 INIT_LIST_HEAD(&reaplist
);
4873 spin_lock(&recall_lock
);
4874 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4875 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4876 list_move(&dp
->dl_recall_lru
, &reaplist
);
4878 spin_unlock(&recall_lock
);
4879 list_for_each_safe(pos
, next
, &reaplist
) {
4880 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4881 unhash_delegation(dp
);
4884 nfsd4_client_tracking_exit(&init_net
);
4889 nfs4_state_shutdown(void)
4891 struct net
*net
= &init_net
;
4892 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4894 cancel_delayed_work_sync(&laundromat_work
);
4895 destroy_workqueue(laundry_wq
);
4896 locks_end_grace(&nn
->nfsd4_manager
);
4898 __nfs4_state_shutdown(net
);
4899 nfs4_unlock_state();
4900 nfsd4_destroy_callback_queue();
4904 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4906 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4907 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4911 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4913 if (cstate
->minorversion
) {
4914 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4915 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4920 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
4922 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4926 * functions to set current state id
4929 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4931 put_stateid(cstate
, &odp
->od_stateid
);
4935 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
4937 put_stateid(cstate
, &open
->op_stateid
);
4941 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4943 put_stateid(cstate
, &close
->cl_stateid
);
4947 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
4949 put_stateid(cstate
, &lock
->lk_resp_stateid
);
4953 * functions to consume current state id
4957 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4959 get_stateid(cstate
, &odp
->od_stateid
);
4963 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
4965 get_stateid(cstate
, &drp
->dr_stateid
);
4969 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
4971 get_stateid(cstate
, &fsp
->fr_stateid
);
4975 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
4977 get_stateid(cstate
, &setattr
->sa_stateid
);
4981 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4983 get_stateid(cstate
, &close
->cl_stateid
);
4987 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
4989 get_stateid(cstate
, &locku
->lu_stateid
);
4993 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
4995 get_stateid(cstate
, &read
->rd_stateid
);
4999 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5001 get_stateid(cstate
, &write
->wr_stateid
);