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/sunrpc/svcauth_gss.h>
42 #include <linux/sunrpc/clnt.h>
46 #define NFSDDBG_FACILITY NFSDDBG_PROC
49 time_t nfsd4_lease
= 90; /* default lease time */
50 time_t nfsd4_grace
= 90;
51 static time_t boot_time
;
52 static u32 current_ownerid
= 1;
53 static u32 current_fileid
= 1;
54 static u32 current_delegid
= 1;
55 static stateid_t zerostateid
; /* bits all 0 */
56 static stateid_t onestateid
; /* bits all 1 */
57 static u64 current_sessionid
= 1;
59 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
60 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
62 /* forward declarations */
63 static struct nfs4_delegation
* search_for_delegation(stateid_t
*stid
);
64 static struct nfs4_delegation
* find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
);
65 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
69 /* Currently used for almost all code touching nfsv4 state: */
70 static DEFINE_MUTEX(client_mutex
);
73 * Currently used for the del_recall_lru and file hash table. In an
74 * effort to decrease the scope of the client_mutex, this spinlock may
75 * eventually cover more:
77 static DEFINE_SPINLOCK(recall_lock
);
79 static struct kmem_cache
*openowner_slab
= NULL
;
80 static struct kmem_cache
*lockowner_slab
= NULL
;
81 static struct kmem_cache
*file_slab
= NULL
;
82 static struct kmem_cache
*stateid_slab
= NULL
;
83 static struct kmem_cache
*deleg_slab
= NULL
;
88 mutex_lock(&client_mutex
);
92 nfs4_unlock_state(void)
94 mutex_unlock(&client_mutex
);
98 opaque_hashval(const void *ptr
, int nbytes
)
100 unsigned char *cptr
= (unsigned char *) ptr
;
110 static struct list_head del_recall_lru
;
113 put_nfs4_file(struct nfs4_file
*fi
)
115 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
116 list_del(&fi
->fi_hash
);
117 spin_unlock(&recall_lock
);
119 kmem_cache_free(file_slab
, fi
);
124 get_nfs4_file(struct nfs4_file
*fi
)
126 atomic_inc(&fi
->fi_ref
);
129 static int num_delegations
;
130 unsigned int max_delegations
;
133 * Open owner state (share locks)
136 /* hash tables for open owners */
137 #define OPEN_OWNER_HASH_BITS 8
138 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
139 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
141 static unsigned int open_ownerid_hashval(const u32 id
)
143 return id
& OPEN_OWNER_HASH_MASK
;
146 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
150 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
152 return ret
& OPEN_OWNER_HASH_MASK
;
155 static struct list_head open_ownerid_hashtbl
[OPEN_OWNER_HASH_SIZE
];
156 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
158 /* hash table for nfs4_file */
159 #define FILE_HASH_BITS 8
160 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
162 /* hash table for (open)nfs4_stateid */
163 #define STATEID_HASH_BITS 10
164 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
165 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
167 static unsigned int file_hashval(struct inode
*ino
)
169 /* XXX: why are we hashing on inode pointer, anyway? */
170 return hash_ptr(ino
, FILE_HASH_BITS
);
173 static unsigned int stateid_hashval(u32 owner_id
, u32 file_id
)
175 return (owner_id
+ file_id
) & STATEID_HASH_MASK
;
178 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
179 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
181 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
183 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
184 atomic_inc(&fp
->fi_access
[oflag
]);
187 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
189 if (oflag
== O_RDWR
) {
190 __nfs4_file_get_access(fp
, O_RDONLY
);
191 __nfs4_file_get_access(fp
, O_WRONLY
);
193 __nfs4_file_get_access(fp
, oflag
);
196 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
198 if (fp
->fi_fds
[oflag
]) {
199 fput(fp
->fi_fds
[oflag
]);
200 fp
->fi_fds
[oflag
] = NULL
;
204 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
206 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
207 nfs4_file_put_fd(fp
, O_RDWR
);
208 nfs4_file_put_fd(fp
, oflag
);
212 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
214 if (oflag
== O_RDWR
) {
215 __nfs4_file_put_access(fp
, O_RDONLY
);
216 __nfs4_file_put_access(fp
, O_WRONLY
);
218 __nfs4_file_put_access(fp
, oflag
);
221 static struct nfs4_delegation
*
222 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
224 struct nfs4_delegation
*dp
;
225 struct nfs4_file
*fp
= stp
->st_file
;
227 dprintk("NFSD alloc_init_deleg\n");
229 * Major work on the lease subsystem (for example, to support
230 * calbacks on stat) will be required before we can support
231 * write delegations properly.
233 if (type
!= NFS4_OPEN_DELEGATE_READ
)
235 if (fp
->fi_had_conflict
)
237 if (num_delegations
> max_delegations
)
239 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
243 INIT_LIST_HEAD(&dp
->dl_perfile
);
244 INIT_LIST_HEAD(&dp
->dl_perclnt
);
245 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
250 dp
->dl_stateid
.si_boot
= boot_time
;
251 dp
->dl_stateid
.si_stateownerid
= current_delegid
++;
252 dp
->dl_stateid
.si_fileid
= 0;
253 dp
->dl_stateid
.si_generation
= 1;
254 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
256 atomic_set(&dp
->dl_count
, 1);
257 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
262 nfs4_put_delegation(struct nfs4_delegation
*dp
)
264 if (atomic_dec_and_test(&dp
->dl_count
)) {
265 dprintk("NFSD: freeing dp %p\n",dp
);
266 put_nfs4_file(dp
->dl_file
);
267 kmem_cache_free(deleg_slab
, dp
);
272 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
274 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
275 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
277 fput(fp
->fi_deleg_file
);
278 fp
->fi_deleg_file
= NULL
;
282 /* Called under the state lock. */
284 unhash_delegation(struct nfs4_delegation
*dp
)
286 list_del_init(&dp
->dl_perclnt
);
287 spin_lock(&recall_lock
);
288 list_del_init(&dp
->dl_perfile
);
289 list_del_init(&dp
->dl_recall_lru
);
290 spin_unlock(&recall_lock
);
291 nfs4_put_deleg_lease(dp
->dl_file
);
292 nfs4_put_delegation(dp
);
299 /* client_lock protects the client lru list and session hash table */
300 static DEFINE_SPINLOCK(client_lock
);
302 /* Hash tables for nfs4_clientid state */
303 #define CLIENT_HASH_BITS 4
304 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
305 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
307 static unsigned int clientid_hashval(u32 id
)
309 return id
& CLIENT_HASH_MASK
;
312 static unsigned int clientstr_hashval(const char *name
)
314 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
318 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
319 * used in reboot/reset lease grace period processing
321 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
322 * setclientid_confirmed info.
324 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
327 * client_lru holds client queue ordered by nfs4_client.cl_time
330 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
331 * for last close replay.
333 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
334 static int reclaim_str_hashtbl_size
= 0;
335 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
336 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
337 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
338 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
339 static struct list_head client_lru
;
340 static struct list_head close_lru
;
343 * We store the NONE, READ, WRITE, and BOTH bits separately in the
344 * st_{access,deny}_bmap field of the stateid, in order to track not
345 * only what share bits are currently in force, but also what
346 * combinations of share bits previous opens have used. This allows us
347 * to enforce the recommendation of rfc 3530 14.2.19 that the server
348 * return an error if the client attempt to downgrade to a combination
349 * of share bits not explicable by closing some of its previous opens.
351 * XXX: This enforcement is actually incomplete, since we don't keep
352 * track of access/deny bit combinations; so, e.g., we allow:
354 * OPEN allow read, deny write
355 * OPEN allow both, deny none
356 * DOWNGRADE allow read, deny none
358 * which we should reject.
361 set_access(unsigned int *access
, unsigned long bmap
) {
365 for (i
= 1; i
< 4; i
++) {
366 if (test_bit(i
, &bmap
))
372 set_deny(unsigned int *deny
, unsigned long bmap
) {
376 for (i
= 0; i
< 4; i
++) {
377 if (test_bit(i
, &bmap
))
383 test_share(struct nfs4_stateid
*stp
, struct nfsd4_open
*open
) {
384 unsigned int access
, deny
;
386 set_access(&access
, stp
->st_access_bmap
);
387 set_deny(&deny
, stp
->st_deny_bmap
);
388 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
393 static int nfs4_access_to_omode(u32 access
)
395 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
396 case NFS4_SHARE_ACCESS_READ
:
398 case NFS4_SHARE_ACCESS_WRITE
:
400 case NFS4_SHARE_ACCESS_BOTH
:
406 static void unhash_generic_stateid(struct nfs4_stateid
*stp
)
408 list_del(&stp
->st_hash
);
409 list_del(&stp
->st_perfile
);
410 list_del(&stp
->st_perstateowner
);
413 static void close_generic_stateid(struct nfs4_stateid
*stp
)
417 if (stp
->st_access_bmap
) {
418 for (i
= 1; i
< 4; i
++) {
419 if (test_bit(i
, &stp
->st_access_bmap
))
420 nfs4_file_put_access(stp
->st_file
,
421 nfs4_access_to_omode(i
));
422 __clear_bit(i
, &stp
->st_access_bmap
);
425 put_nfs4_file(stp
->st_file
);
429 static void free_generic_stateid(struct nfs4_stateid
*stp
)
431 close_generic_stateid(stp
);
432 kmem_cache_free(stateid_slab
, stp
);
435 static void release_lock_stateid(struct nfs4_stateid
*stp
)
439 unhash_generic_stateid(stp
);
440 file
= find_any_file(stp
->st_file
);
442 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
443 free_generic_stateid(stp
);
446 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
448 struct nfs4_stateid
*stp
;
450 list_del(&lo
->lo_owner
.so_idhash
);
451 list_del(&lo
->lo_owner
.so_strhash
);
452 list_del(&lo
->lo_perstateid
);
453 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
454 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
455 struct nfs4_stateid
, st_perstateowner
);
456 release_lock_stateid(stp
);
460 static void release_lockowner(struct nfs4_lockowner
*lo
)
462 unhash_lockowner(lo
);
463 nfs4_free_lockowner(lo
);
467 release_stateid_lockowners(struct nfs4_stateid
*open_stp
)
469 struct nfs4_lockowner
*lo
;
471 while (!list_empty(&open_stp
->st_lockowners
)) {
472 lo
= list_entry(open_stp
->st_lockowners
.next
,
473 struct nfs4_lockowner
, lo_perstateid
);
474 release_lockowner(lo
);
478 static void release_open_stateid(struct nfs4_stateid
*stp
)
480 unhash_generic_stateid(stp
);
481 release_stateid_lockowners(stp
);
482 free_generic_stateid(stp
);
485 static void unhash_openowner(struct nfs4_openowner
*oo
)
487 struct nfs4_stateid
*stp
;
489 list_del(&oo
->oo_owner
.so_idhash
);
490 list_del(&oo
->oo_owner
.so_strhash
);
491 list_del(&oo
->oo_perclient
);
492 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
493 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
494 struct nfs4_stateid
, st_perstateowner
);
495 release_open_stateid(stp
);
499 static void release_openowner(struct nfs4_openowner
*oo
)
501 unhash_openowner(oo
);
502 list_del(&oo
->oo_close_lru
);
503 nfs4_free_openowner(oo
);
506 #define SESSION_HASH_SIZE 512
507 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
510 hash_sessionid(struct nfs4_sessionid
*sessionid
)
512 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
514 return sid
->sequence
% SESSION_HASH_SIZE
;
518 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
520 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
521 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
525 gen_sessionid(struct nfsd4_session
*ses
)
527 struct nfs4_client
*clp
= ses
->se_client
;
528 struct nfsd4_sessionid
*sid
;
530 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
531 sid
->clientid
= clp
->cl_clientid
;
532 sid
->sequence
= current_sessionid
++;
537 * The protocol defines ca_maxresponssize_cached to include the size of
538 * the rpc header, but all we need to cache is the data starting after
539 * the end of the initial SEQUENCE operation--the rest we regenerate
540 * each time. Therefore we can advertise a ca_maxresponssize_cached
541 * value that is the number of bytes in our cache plus a few additional
542 * bytes. In order to stay on the safe side, and not promise more than
543 * we can cache, those additional bytes must be the minimum possible: 24
544 * bytes of rpc header (xid through accept state, with AUTH_NULL
545 * verifier), 12 for the compound header (with zero-length tag), and 44
546 * for the SEQUENCE op response:
548 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
551 free_session_slots(struct nfsd4_session
*ses
)
555 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
556 kfree(ses
->se_slots
[i
]);
560 * We don't actually need to cache the rpc and session headers, so we
561 * can allocate a little less for each slot:
563 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
565 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
568 static int nfsd4_sanitize_slot_size(u32 size
)
570 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
571 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
577 * XXX: If we run out of reserved DRC memory we could (up to a point)
578 * re-negotiate active sessions and reduce their slot usage to make
579 * rooom for new connections. For now we just fail the create session.
581 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
585 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
587 spin_lock(&nfsd_drc_lock
);
588 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
589 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
590 num
= min_t(int, num
, avail
/ slotsize
);
591 nfsd_drc_mem_used
+= num
* slotsize
;
592 spin_unlock(&nfsd_drc_lock
);
597 static void nfsd4_put_drc_mem(int slotsize
, int num
)
599 spin_lock(&nfsd_drc_lock
);
600 nfsd_drc_mem_used
-= slotsize
* num
;
601 spin_unlock(&nfsd_drc_lock
);
604 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
606 struct nfsd4_session
*new;
609 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
610 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
611 mem
= numslots
* sizeof(struct nfsd4_slot
*);
613 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
616 /* allocate each struct nfsd4_slot and data cache in one piece */
617 for (i
= 0; i
< numslots
; i
++) {
618 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
619 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
620 if (!new->se_slots
[i
])
626 kfree(new->se_slots
[i
]);
631 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
633 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
635 new->maxreqs
= numslots
;
636 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
637 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
638 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
639 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
640 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
643 static void free_conn(struct nfsd4_conn
*c
)
645 svc_xprt_put(c
->cn_xprt
);
649 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
651 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
652 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
654 spin_lock(&clp
->cl_lock
);
655 if (!list_empty(&c
->cn_persession
)) {
656 list_del(&c
->cn_persession
);
659 spin_unlock(&clp
->cl_lock
);
660 nfsd4_probe_callback(clp
);
663 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
665 struct nfsd4_conn
*conn
;
667 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
670 svc_xprt_get(rqstp
->rq_xprt
);
671 conn
->cn_xprt
= rqstp
->rq_xprt
;
672 conn
->cn_flags
= flags
;
673 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
677 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
679 conn
->cn_session
= ses
;
680 list_add(&conn
->cn_persession
, &ses
->se_conns
);
683 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
685 struct nfs4_client
*clp
= ses
->se_client
;
687 spin_lock(&clp
->cl_lock
);
688 __nfsd4_hash_conn(conn
, ses
);
689 spin_unlock(&clp
->cl_lock
);
692 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
694 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
695 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
698 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
700 struct nfsd4_conn
*conn
;
703 conn
= alloc_conn(rqstp
, dir
);
705 return nfserr_jukebox
;
706 nfsd4_hash_conn(conn
, ses
);
707 ret
= nfsd4_register_conn(conn
);
709 /* oops; xprt is already down: */
710 nfsd4_conn_lost(&conn
->cn_xpt_user
);
714 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
716 u32 dir
= NFS4_CDFC4_FORE
;
718 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
719 dir
|= NFS4_CDFC4_BACK
;
721 return nfsd4_new_conn(rqstp
, ses
, dir
);
724 /* must be called under client_lock */
725 static void nfsd4_del_conns(struct nfsd4_session
*s
)
727 struct nfs4_client
*clp
= s
->se_client
;
728 struct nfsd4_conn
*c
;
730 spin_lock(&clp
->cl_lock
);
731 while (!list_empty(&s
->se_conns
)) {
732 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
733 list_del_init(&c
->cn_persession
);
734 spin_unlock(&clp
->cl_lock
);
736 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
739 spin_lock(&clp
->cl_lock
);
741 spin_unlock(&clp
->cl_lock
);
744 void free_session(struct kref
*kref
)
746 struct nfsd4_session
*ses
;
749 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
750 nfsd4_del_conns(ses
);
751 spin_lock(&nfsd_drc_lock
);
752 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
753 nfsd_drc_mem_used
-= mem
;
754 spin_unlock(&nfsd_drc_lock
);
755 free_session_slots(ses
);
759 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
761 struct nfsd4_session
*new;
762 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
763 int numslots
, slotsize
;
768 * Note decreasing slot size below client's request may
769 * make it difficult for client to function correctly, whereas
770 * decreasing the number of slots will (just?) affect
771 * performance. When short on memory we therefore prefer to
772 * decrease number of slots instead of their size.
774 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
775 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
779 new = alloc_session(slotsize
, numslots
);
781 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
784 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
786 new->se_client
= clp
;
789 INIT_LIST_HEAD(&new->se_conns
);
791 new->se_cb_seq_nr
= 1;
792 new->se_flags
= cses
->flags
;
793 new->se_cb_prog
= cses
->callback_prog
;
794 kref_init(&new->se_ref
);
795 idx
= hash_sessionid(&new->se_sessionid
);
796 spin_lock(&client_lock
);
797 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
798 spin_lock(&clp
->cl_lock
);
799 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
800 spin_unlock(&clp
->cl_lock
);
801 spin_unlock(&client_lock
);
803 status
= nfsd4_new_conn_from_crses(rqstp
, new);
804 /* whoops: benny points out, status is ignored! (err, or bogus) */
806 free_session(&new->se_ref
);
809 if (cses
->flags
& SESSION4_BACK_CHAN
) {
810 struct sockaddr
*sa
= svc_addr(rqstp
);
812 * This is a little silly; with sessions there's no real
813 * use for the callback address. Use the peer address
814 * as a reasonable default for now, but consider fixing
815 * the rpc client not to require an address in the
818 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
819 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
821 nfsd4_probe_callback(clp
);
825 /* caller must hold client_lock */
826 static struct nfsd4_session
*
827 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
829 struct nfsd4_session
*elem
;
832 dump_sessionid(__func__
, sessionid
);
833 idx
= hash_sessionid(sessionid
);
834 /* Search in the appropriate list */
835 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
836 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
837 NFS4_MAX_SESSIONID_LEN
)) {
842 dprintk("%s: session not found\n", __func__
);
846 /* caller must hold client_lock */
848 unhash_session(struct nfsd4_session
*ses
)
850 list_del(&ses
->se_hash
);
851 spin_lock(&ses
->se_client
->cl_lock
);
852 list_del(&ses
->se_perclnt
);
853 spin_unlock(&ses
->se_client
->cl_lock
);
856 /* must be called under the client_lock */
858 renew_client_locked(struct nfs4_client
*clp
)
860 if (is_client_expired(clp
)) {
861 dprintk("%s: client (clientid %08x/%08x) already expired\n",
863 clp
->cl_clientid
.cl_boot
,
864 clp
->cl_clientid
.cl_id
);
869 * Move client to the end to the LRU list.
871 dprintk("renewing client (clientid %08x/%08x)\n",
872 clp
->cl_clientid
.cl_boot
,
873 clp
->cl_clientid
.cl_id
);
874 list_move_tail(&clp
->cl_lru
, &client_lru
);
875 clp
->cl_time
= get_seconds();
879 renew_client(struct nfs4_client
*clp
)
881 spin_lock(&client_lock
);
882 renew_client_locked(clp
);
883 spin_unlock(&client_lock
);
886 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
888 STALE_CLIENTID(clientid_t
*clid
)
890 if (clid
->cl_boot
== boot_time
)
892 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
893 clid
->cl_boot
, clid
->cl_id
, boot_time
);
898 * XXX Should we use a slab cache ?
899 * This type of memory management is somewhat inefficient, but we use it
900 * anyway since SETCLIENTID is not a common operation.
902 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
904 struct nfs4_client
*clp
;
906 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
909 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
910 if (clp
->cl_name
.data
== NULL
) {
914 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
915 clp
->cl_name
.len
= name
.len
;
920 free_client(struct nfs4_client
*clp
)
922 while (!list_empty(&clp
->cl_sessions
)) {
923 struct nfsd4_session
*ses
;
924 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
926 list_del(&ses
->se_perclnt
);
927 nfsd4_put_session(ses
);
929 if (clp
->cl_cred
.cr_group_info
)
930 put_group_info(clp
->cl_cred
.cr_group_info
);
931 kfree(clp
->cl_principal
);
932 kfree(clp
->cl_name
.data
);
937 release_session_client(struct nfsd4_session
*session
)
939 struct nfs4_client
*clp
= session
->se_client
;
941 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
943 if (is_client_expired(clp
)) {
945 session
->se_client
= NULL
;
947 renew_client_locked(clp
);
948 spin_unlock(&client_lock
);
951 /* must be called under the client_lock */
953 unhash_client_locked(struct nfs4_client
*clp
)
955 struct nfsd4_session
*ses
;
957 mark_client_expired(clp
);
958 list_del(&clp
->cl_lru
);
959 spin_lock(&clp
->cl_lock
);
960 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
961 list_del_init(&ses
->se_hash
);
962 spin_unlock(&clp
->cl_lock
);
966 expire_client(struct nfs4_client
*clp
)
968 struct nfs4_openowner
*oo
;
969 struct nfs4_delegation
*dp
;
970 struct list_head reaplist
;
972 INIT_LIST_HEAD(&reaplist
);
973 spin_lock(&recall_lock
);
974 while (!list_empty(&clp
->cl_delegations
)) {
975 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
976 list_del_init(&dp
->dl_perclnt
);
977 list_move(&dp
->dl_recall_lru
, &reaplist
);
979 spin_unlock(&recall_lock
);
980 while (!list_empty(&reaplist
)) {
981 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
982 list_del_init(&dp
->dl_recall_lru
);
983 unhash_delegation(dp
);
985 while (!list_empty(&clp
->cl_openowners
)) {
986 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
987 release_openowner(oo
);
989 nfsd4_shutdown_callback(clp
);
990 if (clp
->cl_cb_conn
.cb_xprt
)
991 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
992 list_del(&clp
->cl_idhash
);
993 list_del(&clp
->cl_strhash
);
994 spin_lock(&client_lock
);
995 unhash_client_locked(clp
);
996 if (atomic_read(&clp
->cl_refcount
) == 0)
998 spin_unlock(&client_lock
);
1001 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1003 memcpy(target
->cl_verifier
.data
, source
->data
,
1004 sizeof(target
->cl_verifier
.data
));
1007 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1009 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1010 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1013 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1015 target
->cr_uid
= source
->cr_uid
;
1016 target
->cr_gid
= source
->cr_gid
;
1017 target
->cr_group_info
= source
->cr_group_info
;
1018 get_group_info(target
->cr_group_info
);
1021 static int same_name(const char *n1
, const char *n2
)
1023 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1027 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1029 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1033 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1035 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1038 /* XXX what about NGROUP */
1040 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1042 return cr1
->cr_uid
== cr2
->cr_uid
;
1045 static void gen_clid(struct nfs4_client
*clp
)
1047 static u32 current_clientid
= 1;
1049 clp
->cl_clientid
.cl_boot
= boot_time
;
1050 clp
->cl_clientid
.cl_id
= current_clientid
++;
1053 static void gen_confirm(struct nfs4_client
*clp
)
1058 p
= (u32
*)clp
->cl_confirm
.data
;
1059 *p
++ = get_seconds();
1064 same_stateid(stateid_t
*id_one
, stateid_t
*id_two
)
1066 if (id_one
->si_stateownerid
!= id_two
->si_stateownerid
)
1068 return id_one
->si_fileid
== id_two
->si_fileid
;
1071 static struct nfs4_stateid
*find_stateid(stateid_t
*t
)
1073 struct nfs4_stateid
*s
;
1074 unsigned int hashval
;
1076 hashval
= stateid_hashval(t
->si_stateownerid
, t
->si_fileid
);
1077 list_for_each_entry(s
, &stateid_hashtbl
[hashval
], st_hash
)
1078 if (same_stateid(&s
->st_stateid
, t
))
1083 static struct nfs4_stateid
*find_stateid_by_type(stateid_t
*t
, char typemask
)
1085 struct nfs4_stateid
*s
;
1087 s
= find_stateid(t
);
1090 if (typemask
& s
->st_type
)
1095 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1096 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1098 struct nfs4_client
*clp
;
1099 struct sockaddr
*sa
= svc_addr(rqstp
);
1102 clp
= alloc_client(name
);
1106 INIT_LIST_HEAD(&clp
->cl_sessions
);
1108 princ
= svc_gss_principal(rqstp
);
1110 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1111 if (clp
->cl_principal
== NULL
) {
1117 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1118 atomic_set(&clp
->cl_refcount
, 0);
1119 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1120 INIT_LIST_HEAD(&clp
->cl_idhash
);
1121 INIT_LIST_HEAD(&clp
->cl_strhash
);
1122 INIT_LIST_HEAD(&clp
->cl_openowners
);
1123 INIT_LIST_HEAD(&clp
->cl_delegations
);
1124 INIT_LIST_HEAD(&clp
->cl_lru
);
1125 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1126 spin_lock_init(&clp
->cl_lock
);
1127 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1128 clp
->cl_time
= get_seconds();
1129 clear_bit(0, &clp
->cl_cb_slot_busy
);
1130 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1131 copy_verf(clp
, verf
);
1132 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1133 clp
->cl_flavor
= rqstp
->rq_flavor
;
1134 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1136 clp
->cl_cb_session
= NULL
;
1140 static int check_name(struct xdr_netobj name
)
1144 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1145 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1152 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1154 unsigned int idhashval
;
1156 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1157 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1158 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1163 move_to_confirmed(struct nfs4_client
*clp
)
1165 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1166 unsigned int strhashval
;
1168 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1169 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1170 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1171 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1175 static struct nfs4_client
*
1176 find_confirmed_client(clientid_t
*clid
)
1178 struct nfs4_client
*clp
;
1179 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1181 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1182 if (same_clid(&clp
->cl_clientid
, clid
))
1188 static struct nfs4_client
*
1189 find_unconfirmed_client(clientid_t
*clid
)
1191 struct nfs4_client
*clp
;
1192 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1194 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1195 if (same_clid(&clp
->cl_clientid
, clid
))
1201 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1203 return clp
->cl_exchange_flags
!= 0;
1206 static struct nfs4_client
*
1207 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1209 struct nfs4_client
*clp
;
1211 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1212 if (same_name(clp
->cl_recdir
, dname
))
1218 static struct nfs4_client
*
1219 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1221 struct nfs4_client
*clp
;
1223 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1224 if (same_name(clp
->cl_recdir
, dname
))
1230 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1234 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1235 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1238 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1239 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1245 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1247 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1248 struct sockaddr
*sa
= svc_addr(rqstp
);
1249 u32 scopeid
= rpc_get_scope_id(sa
);
1250 unsigned short expected_family
;
1252 /* Currently, we only support tcp and tcp6 for the callback channel */
1253 if (se
->se_callback_netid_len
== 3 &&
1254 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1255 expected_family
= AF_INET
;
1256 else if (se
->se_callback_netid_len
== 4 &&
1257 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1258 expected_family
= AF_INET6
;
1262 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1263 se
->se_callback_addr_len
,
1264 (struct sockaddr
*)&conn
->cb_addr
,
1265 sizeof(conn
->cb_addr
));
1267 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1270 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1271 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1273 conn
->cb_prog
= se
->se_callback_prog
;
1274 conn
->cb_ident
= se
->se_callback_ident
;
1275 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1278 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1279 conn
->cb_addrlen
= 0;
1280 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1281 "will not receive delegations\n",
1282 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1288 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1291 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1293 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1296 dprintk("--> %s slot %p\n", __func__
, slot
);
1298 slot
->sl_opcnt
= resp
->opcnt
;
1299 slot
->sl_status
= resp
->cstate
.status
;
1301 if (nfsd4_not_cached(resp
)) {
1302 slot
->sl_datalen
= 0;
1305 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1306 base
= (char *)resp
->cstate
.datap
-
1307 (char *)resp
->xbuf
->head
[0].iov_base
;
1308 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1310 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1315 * Encode the replay sequence operation from the slot values.
1316 * If cachethis is FALSE encode the uncached rep error on the next
1317 * operation which sets resp->p and increments resp->opcnt for
1318 * nfs4svc_encode_compoundres.
1322 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1323 struct nfsd4_compoundres
*resp
)
1325 struct nfsd4_op
*op
;
1326 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1328 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1329 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1331 /* Encode the replayed sequence operation */
1332 op
= &args
->ops
[resp
->opcnt
- 1];
1333 nfsd4_encode_operation(resp
, op
);
1335 /* Return nfserr_retry_uncached_rep in next operation. */
1336 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1337 op
= &args
->ops
[resp
->opcnt
++];
1338 op
->status
= nfserr_retry_uncached_rep
;
1339 nfsd4_encode_operation(resp
, op
);
1345 * The sequence operation is not cached because we can use the slot and
1349 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1350 struct nfsd4_sequence
*seq
)
1352 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1355 dprintk("--> %s slot %p\n", __func__
, slot
);
1357 /* Either returns 0 or nfserr_retry_uncached */
1358 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1359 if (status
== nfserr_retry_uncached_rep
)
1362 /* The sequence operation has been encoded, cstate->datap set. */
1363 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1365 resp
->opcnt
= slot
->sl_opcnt
;
1366 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1367 status
= slot
->sl_status
;
1373 * Set the exchange_id flags returned by the server.
1376 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1378 /* pNFS is not supported */
1379 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1381 /* Referrals are supported, Migration is not. */
1382 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1384 /* set the wire flags to return to client. */
1385 clid
->flags
= new->cl_exchange_flags
;
1389 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1390 struct nfsd4_compound_state
*cstate
,
1391 struct nfsd4_exchange_id
*exid
)
1393 struct nfs4_client
*unconf
, *conf
, *new;
1395 unsigned int strhashval
;
1396 char dname
[HEXDIR_LEN
];
1397 char addr_str
[INET6_ADDRSTRLEN
];
1398 nfs4_verifier verf
= exid
->verifier
;
1399 struct sockaddr
*sa
= svc_addr(rqstp
);
1401 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1402 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1403 "ip_addr=%s flags %x, spa_how %d\n",
1404 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1405 addr_str
, exid
->flags
, exid
->spa_how
);
1407 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1408 return nfserr_inval
;
1410 /* Currently only support SP4_NONE */
1411 switch (exid
->spa_how
) {
1415 return nfserr_serverfault
;
1417 BUG(); /* checked by xdr code */
1419 return nfserr_serverfault
; /* no excuse :-/ */
1422 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1427 strhashval
= clientstr_hashval(dname
);
1432 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1434 if (!clp_used_exchangeid(conf
)) {
1435 status
= nfserr_clid_inuse
; /* XXX: ? */
1438 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1439 /* 18.35.4 case 8 */
1440 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1441 status
= nfserr_not_same
;
1444 /* Client reboot: destroy old state */
1445 expire_client(conf
);
1448 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1449 /* 18.35.4 case 9 */
1450 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1451 status
= nfserr_perm
;
1454 expire_client(conf
);
1458 * Set bit when the owner id and verifier map to an already
1459 * confirmed client id (18.35.3).
1461 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1464 * Falling into 18.35.4 case 2, possible router replay.
1465 * Leave confirmed record intact and return same result.
1467 copy_verf(conf
, &verf
);
1472 /* 18.35.4 case 7 */
1473 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1474 status
= nfserr_noent
;
1478 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1481 * Possible retry or client restart. Per 18.35.4 case 4,
1482 * a new unconfirmed record should be generated regardless
1483 * of whether any properties have changed.
1485 expire_client(unconf
);
1490 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1492 status
= nfserr_jukebox
;
1497 add_to_unconfirmed(new, strhashval
);
1499 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1500 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1503 nfsd4_set_ex_flags(new, exid
);
1505 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1506 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1510 nfs4_unlock_state();
1512 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1517 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1519 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1522 /* The slot is in use, and no response has been sent. */
1524 if (seqid
== slot_seqid
)
1525 return nfserr_jukebox
;
1527 return nfserr_seq_misordered
;
1530 if (likely(seqid
== slot_seqid
+ 1))
1533 if (seqid
== slot_seqid
)
1534 return nfserr_replay_cache
;
1536 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1538 /* Misordered replay or misordered new request */
1539 return nfserr_seq_misordered
;
1543 * Cache the create session result into the create session single DRC
1544 * slot cache by saving the xdr structure. sl_seqid has been set.
1545 * Do this for solo or embedded create session operations.
1548 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1549 struct nfsd4_clid_slot
*slot
, int nfserr
)
1551 slot
->sl_status
= nfserr
;
1552 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1556 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1557 struct nfsd4_clid_slot
*slot
)
1559 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1560 return slot
->sl_status
;
1563 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1564 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1565 1 + /* MIN tag is length with zero, only length */ \
1566 3 + /* version, opcount, opcode */ \
1567 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1568 /* seqid, slotID, slotID, cache */ \
1569 4 ) * sizeof(__be32))
1571 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1572 2 + /* verifier: AUTH_NULL, length 0 */\
1574 1 + /* MIN tag is length with zero, only length */ \
1575 3 + /* opcount, opcode, opstatus*/ \
1576 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1577 /* seqid, slotID, slotID, slotID, status */ \
1578 5 ) * sizeof(__be32))
1580 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1582 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1583 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1587 nfsd4_create_session(struct svc_rqst
*rqstp
,
1588 struct nfsd4_compound_state
*cstate
,
1589 struct nfsd4_create_session
*cr_ses
)
1591 struct sockaddr
*sa
= svc_addr(rqstp
);
1592 struct nfs4_client
*conf
, *unconf
;
1593 struct nfsd4_session
*new;
1594 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1595 bool confirm_me
= false;
1598 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1599 return nfserr_inval
;
1602 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1603 conf
= find_confirmed_client(&cr_ses
->clientid
);
1606 cs_slot
= &conf
->cl_cs_slot
;
1607 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1608 if (status
== nfserr_replay_cache
) {
1609 dprintk("Got a create_session replay! seqid= %d\n",
1611 /* Return the cached reply status */
1612 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1614 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1615 status
= nfserr_seq_misordered
;
1616 dprintk("Sequence misordered!\n");
1617 dprintk("Expected seqid= %d but got seqid= %d\n",
1618 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1621 } else if (unconf
) {
1622 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1623 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1624 status
= nfserr_clid_inuse
;
1628 cs_slot
= &unconf
->cl_cs_slot
;
1629 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1631 /* an unconfirmed replay returns misordered */
1632 status
= nfserr_seq_misordered
;
1639 status
= nfserr_stale_clientid
;
1644 * XXX: we should probably set this at creation time, and check
1645 * for consistent minorversion use throughout:
1647 conf
->cl_minorversion
= 1;
1649 * We do not support RDMA or persistent sessions
1651 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1652 cr_ses
->flags
&= ~SESSION4_RDMA
;
1654 status
= nfserr_toosmall
;
1655 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1658 status
= nfserr_jukebox
;
1659 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1663 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1664 NFS4_MAX_SESSIONID_LEN
);
1665 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1666 sizeof(struct nfsd4_channel_attrs
));
1667 cs_slot
->sl_seqid
++;
1668 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1670 /* cache solo and embedded create sessions under the state lock */
1671 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1673 move_to_confirmed(conf
);
1675 nfs4_unlock_state();
1676 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1680 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1682 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1683 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1685 return argp
->opcnt
== resp
->opcnt
;
1688 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1691 case NFS4_CDFC4_FORE
:
1692 case NFS4_CDFC4_BACK
:
1694 case NFS4_CDFC4_FORE_OR_BOTH
:
1695 case NFS4_CDFC4_BACK_OR_BOTH
:
1696 *dir
= NFS4_CDFC4_BOTH
;
1699 return nfserr_inval
;
1702 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1703 struct nfsd4_compound_state
*cstate
,
1704 struct nfsd4_bind_conn_to_session
*bcts
)
1708 if (!nfsd4_last_compound_op(rqstp
))
1709 return nfserr_not_only_op
;
1710 spin_lock(&client_lock
);
1711 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1712 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1713 * client_lock iself: */
1714 if (cstate
->session
) {
1715 nfsd4_get_session(cstate
->session
);
1716 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1718 spin_unlock(&client_lock
);
1719 if (!cstate
->session
)
1720 return nfserr_badsession
;
1722 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1724 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1728 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1732 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1736 nfsd4_destroy_session(struct svc_rqst
*r
,
1737 struct nfsd4_compound_state
*cstate
,
1738 struct nfsd4_destroy_session
*sessionid
)
1740 struct nfsd4_session
*ses
;
1741 u32 status
= nfserr_badsession
;
1744 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1745 * - Should we return nfserr_back_chan_busy if waiting for
1746 * callbacks on to-be-destroyed session?
1747 * - Do we need to clear any callback info from previous session?
1750 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1751 if (!nfsd4_last_compound_op(r
))
1752 return nfserr_not_only_op
;
1754 dump_sessionid(__func__
, &sessionid
->sessionid
);
1755 spin_lock(&client_lock
);
1756 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1758 spin_unlock(&client_lock
);
1762 unhash_session(ses
);
1763 spin_unlock(&client_lock
);
1766 nfsd4_probe_callback_sync(ses
->se_client
);
1767 nfs4_unlock_state();
1769 nfsd4_del_conns(ses
);
1771 nfsd4_put_session(ses
);
1774 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1778 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1780 struct nfsd4_conn
*c
;
1782 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1783 if (c
->cn_xprt
== xpt
) {
1790 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1792 struct nfs4_client
*clp
= ses
->se_client
;
1793 struct nfsd4_conn
*c
;
1796 spin_lock(&clp
->cl_lock
);
1797 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1799 spin_unlock(&clp
->cl_lock
);
1803 __nfsd4_hash_conn(new, ses
);
1804 spin_unlock(&clp
->cl_lock
);
1805 ret
= nfsd4_register_conn(new);
1807 /* oops; xprt is already down: */
1808 nfsd4_conn_lost(&new->cn_xpt_user
);
1812 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1814 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1816 return args
->opcnt
> session
->se_fchannel
.maxops
;
1819 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1820 struct nfsd4_session
*session
)
1822 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1824 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1828 nfsd4_sequence(struct svc_rqst
*rqstp
,
1829 struct nfsd4_compound_state
*cstate
,
1830 struct nfsd4_sequence
*seq
)
1832 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1833 struct nfsd4_session
*session
;
1834 struct nfsd4_slot
*slot
;
1835 struct nfsd4_conn
*conn
;
1838 if (resp
->opcnt
!= 1)
1839 return nfserr_sequence_pos
;
1842 * Will be either used or freed by nfsd4_sequence_check_conn
1845 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1847 return nfserr_jukebox
;
1849 spin_lock(&client_lock
);
1850 status
= nfserr_badsession
;
1851 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1855 status
= nfserr_too_many_ops
;
1856 if (nfsd4_session_too_many_ops(rqstp
, session
))
1859 status
= nfserr_req_too_big
;
1860 if (nfsd4_request_too_big(rqstp
, session
))
1863 status
= nfserr_badslot
;
1864 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1867 slot
= session
->se_slots
[seq
->slotid
];
1868 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1870 /* We do not negotiate the number of slots yet, so set the
1871 * maxslots to the session maxreqs which is used to encode
1872 * sr_highest_slotid and the sr_target_slot id to maxslots */
1873 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1875 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1876 if (status
== nfserr_replay_cache
) {
1877 cstate
->slot
= slot
;
1878 cstate
->session
= session
;
1879 /* Return the cached reply status and set cstate->status
1880 * for nfsd4_proc_compound processing */
1881 status
= nfsd4_replay_cache_entry(resp
, seq
);
1882 cstate
->status
= nfserr_replay_cache
;
1888 nfsd4_sequence_check_conn(conn
, session
);
1891 /* Success! bump slot seqid */
1892 slot
->sl_inuse
= true;
1893 slot
->sl_seqid
= seq
->seqid
;
1894 slot
->sl_cachethis
= seq
->cachethis
;
1896 cstate
->slot
= slot
;
1897 cstate
->session
= session
;
1900 /* Hold a session reference until done processing the compound. */
1901 if (cstate
->session
) {
1902 struct nfs4_client
*clp
= session
->se_client
;
1904 nfsd4_get_session(cstate
->session
);
1905 atomic_inc(&clp
->cl_refcount
);
1906 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1907 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1910 spin_unlock(&client_lock
);
1911 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1916 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1920 if (rc
->rca_one_fs
) {
1921 if (!cstate
->current_fh
.fh_dentry
)
1922 return nfserr_nofilehandle
;
1924 * We don't take advantage of the rca_one_fs case.
1925 * That's OK, it's optional, we can safely ignore it.
1931 status
= nfserr_complete_already
;
1932 if (cstate
->session
->se_client
->cl_firststate
)
1935 status
= nfserr_stale_clientid
;
1936 if (is_client_expired(cstate
->session
->se_client
))
1938 * The following error isn't really legal.
1939 * But we only get here if the client just explicitly
1940 * destroyed the client. Surely it no longer cares what
1941 * error it gets back on an operation for the dead
1947 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1949 nfs4_unlock_state();
1954 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1955 struct nfsd4_setclientid
*setclid
)
1957 struct xdr_netobj clname
= {
1958 .len
= setclid
->se_namelen
,
1959 .data
= setclid
->se_name
,
1961 nfs4_verifier clverifier
= setclid
->se_verf
;
1962 unsigned int strhashval
;
1963 struct nfs4_client
*conf
, *unconf
, *new;
1965 char dname
[HEXDIR_LEN
];
1967 if (!check_name(clname
))
1968 return nfserr_inval
;
1970 status
= nfs4_make_rec_clidname(dname
, &clname
);
1975 * XXX The Duplicate Request Cache (DRC) has been checked (??)
1976 * We get here on a DRC miss.
1979 strhashval
= clientstr_hashval(dname
);
1982 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1984 /* RFC 3530 14.2.33 CASE 0: */
1985 status
= nfserr_clid_inuse
;
1986 if (clp_used_exchangeid(conf
))
1988 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1989 char addr_str
[INET6_ADDRSTRLEN
];
1990 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
1992 dprintk("NFSD: setclientid: string in use by client "
1993 "at %s\n", addr_str
);
1998 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
1999 * has a description of SETCLIENTID request processing consisting
2000 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2002 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2003 status
= nfserr_jukebox
;
2006 * RFC 3530 14.2.33 CASE 4:
2007 * placed first, because it is the normal case
2010 expire_client(unconf
);
2011 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2015 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2017 * RFC 3530 14.2.33 CASE 1:
2018 * probable callback update
2021 /* Note this is removing unconfirmed {*x***},
2022 * which is stronger than RFC recommended {vxc**}.
2023 * This has the advantage that there is at most
2024 * one {*x***} in either list at any time.
2026 expire_client(unconf
);
2028 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2031 copy_clid(new, conf
);
2032 } else if (!unconf
) {
2034 * RFC 3530 14.2.33 CASE 2:
2035 * probable client reboot; state will be removed if
2038 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2044 * RFC 3530 14.2.33 CASE 3:
2045 * probable client reboot; state will be removed if
2048 expire_client(unconf
);
2049 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2055 * XXX: we should probably set this at creation time, and check
2056 * for consistent minorversion use throughout:
2058 new->cl_minorversion
= 0;
2059 gen_callback(new, setclid
, rqstp
);
2060 add_to_unconfirmed(new, strhashval
);
2061 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2062 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2063 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2066 nfs4_unlock_state();
2072 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2073 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2074 * bullets, labeled as CASE1 - CASE4 below.
2077 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2078 struct nfsd4_compound_state
*cstate
,
2079 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2081 struct sockaddr
*sa
= svc_addr(rqstp
);
2082 struct nfs4_client
*conf
, *unconf
;
2083 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2084 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2087 if (STALE_CLIENTID(clid
))
2088 return nfserr_stale_clientid
;
2090 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2091 * We get here on a DRC miss.
2096 conf
= find_confirmed_client(clid
);
2097 unconf
= find_unconfirmed_client(clid
);
2099 status
= nfserr_clid_inuse
;
2100 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2102 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2106 * section 14.2.34 of RFC 3530 has a description of
2107 * SETCLIENTID_CONFIRM request processing consisting
2108 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2110 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2112 * RFC 3530 14.2.34 CASE 1:
2115 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2116 status
= nfserr_clid_inuse
;
2118 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2119 nfsd4_probe_callback(conf
);
2120 expire_client(unconf
);
2124 } else if (conf
&& !unconf
) {
2126 * RFC 3530 14.2.34 CASE 2:
2127 * probable retransmitted request; play it safe and
2130 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2131 status
= nfserr_clid_inuse
;
2134 } else if (!conf
&& unconf
2135 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2137 * RFC 3530 14.2.34 CASE 3:
2138 * Normal case; new or rebooted client:
2140 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2141 status
= nfserr_clid_inuse
;
2144 clientstr_hashval(unconf
->cl_recdir
);
2145 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2148 nfsd4_remove_clid_dir(conf
);
2149 expire_client(conf
);
2151 move_to_confirmed(unconf
);
2153 nfsd4_probe_callback(conf
);
2156 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2157 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2160 * RFC 3530 14.2.34 CASE 4:
2161 * Client probably hasn't noticed that we rebooted yet.
2163 status
= nfserr_stale_clientid
;
2165 /* check that we have hit one of the cases...*/
2166 status
= nfserr_clid_inuse
;
2169 nfs4_unlock_state();
2173 /* OPEN Share state helper functions */
2174 static inline struct nfs4_file
*
2175 alloc_init_file(struct inode
*ino
)
2177 struct nfs4_file
*fp
;
2178 unsigned int hashval
= file_hashval(ino
);
2180 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2182 atomic_set(&fp
->fi_ref
, 1);
2183 INIT_LIST_HEAD(&fp
->fi_hash
);
2184 INIT_LIST_HEAD(&fp
->fi_stateids
);
2185 INIT_LIST_HEAD(&fp
->fi_delegations
);
2186 fp
->fi_inode
= igrab(ino
);
2187 fp
->fi_id
= current_fileid
++;
2188 fp
->fi_had_conflict
= false;
2189 fp
->fi_lease
= NULL
;
2190 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2191 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2192 spin_lock(&recall_lock
);
2193 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2194 spin_unlock(&recall_lock
);
2201 nfsd4_free_slab(struct kmem_cache
**slab
)
2205 kmem_cache_destroy(*slab
);
2210 nfsd4_free_slabs(void)
2212 nfsd4_free_slab(&openowner_slab
);
2213 nfsd4_free_slab(&lockowner_slab
);
2214 nfsd4_free_slab(&file_slab
);
2215 nfsd4_free_slab(&stateid_slab
);
2216 nfsd4_free_slab(&deleg_slab
);
2220 nfsd4_init_slabs(void)
2222 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2223 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2224 if (openowner_slab
== NULL
)
2226 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2227 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2228 if (lockowner_slab
== NULL
)
2230 file_slab
= kmem_cache_create("nfsd4_files",
2231 sizeof(struct nfs4_file
), 0, 0, NULL
);
2232 if (file_slab
== NULL
)
2234 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2235 sizeof(struct nfs4_stateid
), 0, 0, NULL
);
2236 if (stateid_slab
== NULL
)
2238 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2239 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2240 if (deleg_slab
== NULL
)
2245 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2249 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2251 kfree(oo
->oo_owner
.so_owner
.data
);
2252 kmem_cache_free(openowner_slab
, oo
);
2255 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2257 kfree(lo
->lo_owner
.so_owner
.data
);
2258 kmem_cache_free(lockowner_slab
, lo
);
2261 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2263 rp
->rp_status
= nfserr_serverfault
;
2265 rp
->rp_buf
= rp
->rp_ibuf
;
2268 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2270 struct nfs4_stateowner
*sop
;
2272 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2276 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2277 if (!sop
->so_owner
.data
) {
2278 kmem_cache_free(slab
, sop
);
2281 sop
->so_owner
.len
= owner
->len
;
2283 INIT_LIST_HEAD(&sop
->so_stateids
);
2284 sop
->so_id
= current_ownerid
++;
2285 sop
->so_client
= clp
;
2286 init_nfs4_replay(&sop
->so_replay
);
2290 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2292 unsigned int idhashval
;
2294 idhashval
= open_ownerid_hashval(oo
->oo_owner
.so_id
);
2295 list_add(&oo
->oo_owner
.so_idhash
, &open_ownerid_hashtbl
[idhashval
]);
2296 list_add(&oo
->oo_owner
.so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2297 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2300 static struct nfs4_openowner
*
2301 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2302 struct nfs4_openowner
*oo
;
2304 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2307 oo
->oo_owner
.so_is_open_owner
= 1;
2308 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2309 oo
->oo_confirmed
= 0;
2311 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2312 hash_openowner(oo
, clp
, strhashval
);
2317 init_stateid(struct nfs4_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2318 struct nfs4_openowner
*oo
= open
->op_openowner
;
2319 unsigned int hashval
= stateid_hashval(oo
->oo_owner
.so_id
, fp
->fi_id
);
2321 INIT_LIST_HEAD(&stp
->st_hash
);
2322 INIT_LIST_HEAD(&stp
->st_perstateowner
);
2323 INIT_LIST_HEAD(&stp
->st_lockowners
);
2324 INIT_LIST_HEAD(&stp
->st_perfile
);
2325 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
2326 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2327 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2328 stp
->st_type
= NFS4_OPEN_STID
;
2329 stp
->st_stateowner
= &oo
->oo_owner
;
2332 stp
->st_stateid
.si_boot
= boot_time
;
2333 stp
->st_stateid
.si_stateownerid
= oo
->oo_owner
.so_id
;
2334 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
2335 /* note will be incremented before first return to client: */
2336 stp
->st_stateid
.si_generation
= 0;
2337 stp
->st_access_bmap
= 0;
2338 stp
->st_deny_bmap
= 0;
2339 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2340 &stp
->st_access_bmap
);
2341 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2342 stp
->st_openstp
= NULL
;
2346 move_to_close_lru(struct nfs4_openowner
*oo
)
2348 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2350 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2351 oo
->oo_time
= get_seconds();
2355 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2358 return (sop
->so_owner
.len
== owner
->len
) &&
2359 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2360 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2363 static struct nfs4_openowner
*
2364 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2366 struct nfs4_stateowner
*so
= NULL
;
2368 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2369 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2370 return container_of(so
, struct nfs4_openowner
, oo_owner
);
2375 /* search file_hashtbl[] for file */
2376 static struct nfs4_file
*
2377 find_file(struct inode
*ino
)
2379 unsigned int hashval
= file_hashval(ino
);
2380 struct nfs4_file
*fp
;
2382 spin_lock(&recall_lock
);
2383 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2384 if (fp
->fi_inode
== ino
) {
2386 spin_unlock(&recall_lock
);
2390 spin_unlock(&recall_lock
);
2394 static inline int access_valid(u32 x
, u32 minorversion
)
2396 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2398 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2400 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2401 if (minorversion
&& x
) {
2402 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2404 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2406 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2413 static inline int deny_valid(u32 x
)
2415 /* Note: unlike access bits, deny bits may be zero. */
2416 return x
<= NFS4_SHARE_DENY_BOTH
;
2420 * Called to check deny when READ with all zero stateid or
2421 * WRITE with all zero or all one stateid
2424 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2426 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2427 struct nfs4_file
*fp
;
2428 struct nfs4_stateid
*stp
;
2431 dprintk("NFSD: nfs4_share_conflict\n");
2433 fp
= find_file(ino
);
2436 ret
= nfserr_locked
;
2437 /* Search for conflicting share reservations */
2438 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2439 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2440 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2449 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2451 /* We're assuming the state code never drops its reference
2452 * without first removing the lease. Since we're in this lease
2453 * callback (and since the lease code is serialized by the kernel
2454 * lock) we know the server hasn't removed the lease yet, we know
2455 * it's safe to take a reference: */
2456 atomic_inc(&dp
->dl_count
);
2458 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2460 /* only place dl_time is set. protected by lock_flocks*/
2461 dp
->dl_time
= get_seconds();
2463 nfsd4_cb_recall(dp
);
2466 /* Called from break_lease() with lock_flocks() held. */
2467 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2469 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2470 struct nfs4_delegation
*dp
;
2473 /* We assume break_lease is only called once per lease: */
2474 BUG_ON(fp
->fi_had_conflict
);
2476 * We don't want the locks code to timeout the lease for us;
2477 * we'll remove it ourself if a delegation isn't returned
2480 fl
->fl_break_time
= 0;
2482 spin_lock(&recall_lock
);
2483 fp
->fi_had_conflict
= true;
2484 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2485 nfsd_break_one_deleg(dp
);
2486 spin_unlock(&recall_lock
);
2490 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2493 return lease_modify(onlist
, arg
);
2498 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2499 .lm_break
= nfsd_break_deleg_cb
,
2500 .lm_change
= nfsd_change_deleg_cb
,
2503 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2505 if (nfsd4_has_session(cstate
))
2507 if (seqid
== so
->so_seqid
- 1)
2508 return nfserr_replay_me
;
2509 if (seqid
== so
->so_seqid
)
2511 return nfserr_bad_seqid
;
2515 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2516 struct nfsd4_open
*open
)
2518 clientid_t
*clientid
= &open
->op_clientid
;
2519 struct nfs4_client
*clp
= NULL
;
2520 unsigned int strhashval
;
2521 struct nfs4_openowner
*oo
= NULL
;
2524 if (!check_name(open
->op_owner
))
2525 return nfserr_inval
;
2527 if (STALE_CLIENTID(&open
->op_clientid
))
2528 return nfserr_stale_clientid
;
2530 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2531 oo
= find_openstateowner_str(strhashval
, open
);
2532 open
->op_openowner
= oo
;
2534 /* Make sure the client's lease hasn't expired. */
2535 clp
= find_confirmed_client(clientid
);
2537 return nfserr_expired
;
2540 if (!oo
->oo_confirmed
) {
2541 /* Replace unconfirmed owners without checking for replay. */
2542 clp
= oo
->oo_owner
.so_client
;
2543 release_openowner(oo
);
2544 open
->op_openowner
= NULL
;
2547 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2551 if (open
->op_openowner
== NULL
) {
2552 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2554 return nfserr_jukebox
;
2555 open
->op_openowner
= oo
;
2557 list_del_init(&oo
->oo_close_lru
);
2558 renew_client(oo
->oo_owner
.so_client
);
2562 static inline __be32
2563 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2565 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2566 return nfserr_openmode
;
2571 static struct nfs4_delegation
*
2572 find_delegation_file(struct nfs4_file
*fp
, stateid_t
*stid
)
2574 struct nfs4_delegation
*dp
;
2576 spin_lock(&recall_lock
);
2577 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2578 if (dp
->dl_stateid
.si_stateownerid
== stid
->si_stateownerid
) {
2579 spin_unlock(&recall_lock
);
2582 spin_unlock(&recall_lock
);
2586 static int share_access_to_flags(u32 share_access
)
2588 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2590 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2594 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2595 struct nfs4_delegation
**dp
)
2598 __be32 status
= nfserr_bad_stateid
;
2600 *dp
= find_delegation_file(fp
, &open
->op_delegate_stateid
);
2603 flags
= share_access_to_flags(open
->op_share_access
);
2604 status
= nfs4_check_delegmode(*dp
, flags
);
2608 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2612 open
->op_openowner
->oo_confirmed
= 1;
2617 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_stateid
**stpp
)
2619 struct nfs4_stateid
*local
;
2620 struct nfs4_openowner
*oo
= open
->op_openowner
;
2622 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2623 /* ignore lock owners */
2624 if (local
->st_stateowner
->so_is_open_owner
== 0)
2626 /* remember if we have seen this open owner */
2627 if (local
->st_stateowner
== &oo
->oo_owner
)
2629 /* check for conflicting share reservations */
2630 if (!test_share(local
, open
))
2631 return nfserr_share_denied
;
2636 static inline struct nfs4_stateid
*
2637 nfs4_alloc_stateid(void)
2639 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2642 static inline int nfs4_access_to_access(u32 nfs4_access
)
2646 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2647 flags
|= NFSD_MAY_READ
;
2648 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2649 flags
|= NFSD_MAY_WRITE
;
2653 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2654 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2657 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2658 int access
= nfs4_access_to_access(open
->op_share_access
);
2660 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2661 * allowing it to break the lease and return EAGAIN leaves the
2662 * client unable to make progress in returning the delegation */
2663 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2664 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2666 if (!fp
->fi_fds
[oflag
]) {
2667 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2668 &fp
->fi_fds
[oflag
]);
2672 nfs4_file_get_access(fp
, oflag
);
2678 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_stateid
**stpp
,
2679 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2680 struct nfsd4_open
*open
)
2682 struct nfs4_stateid
*stp
;
2685 stp
= nfs4_alloc_stateid();
2687 return nfserr_jukebox
;
2689 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2691 kmem_cache_free(stateid_slab
, stp
);
2698 static inline __be32
2699 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2700 struct nfsd4_open
*open
)
2702 struct iattr iattr
= {
2703 .ia_valid
= ATTR_SIZE
,
2706 if (!open
->op_truncate
)
2708 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2709 return nfserr_inval
;
2710 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2714 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_stateid
*stp
, struct nfsd4_open
*open
)
2716 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2720 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2722 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2726 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2729 int oflag
= nfs4_access_to_omode(op_share_access
);
2730 nfs4_file_put_access(fp
, oflag
);
2734 /* remember the open */
2735 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2736 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2743 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2745 open
->op_openowner
->oo_confirmed
= 1;
2746 open
->op_openowner
->oo_owner
.so_client
->cl_firststate
= 1;
2749 /* Should we give out recallable state?: */
2750 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2752 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2755 * In the sessions case, since we don't have to establish a
2756 * separate connection for callbacks, we assume it's OK
2757 * until we hear otherwise:
2759 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2762 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2764 struct file_lock
*fl
;
2766 fl
= locks_alloc_lock();
2769 locks_init_lock(fl
);
2770 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2771 fl
->fl_flags
= FL_LEASE
;
2772 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2773 fl
->fl_end
= OFFSET_MAX
;
2774 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2775 fl
->fl_pid
= current
->tgid
;
2779 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2781 struct nfs4_file
*fp
= dp
->dl_file
;
2782 struct file_lock
*fl
;
2785 fl
= nfs4_alloc_init_lease(dp
, flag
);
2788 fl
->fl_file
= find_readable_file(fp
);
2789 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2790 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2792 list_del_init(&dp
->dl_perclnt
);
2793 locks_free_lock(fl
);
2797 fp
->fi_deleg_file
= fl
->fl_file
;
2798 get_file(fp
->fi_deleg_file
);
2799 atomic_set(&fp
->fi_delegees
, 1);
2800 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2804 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2806 struct nfs4_file
*fp
= dp
->dl_file
;
2809 return nfs4_setlease(dp
, flag
);
2810 spin_lock(&recall_lock
);
2811 if (fp
->fi_had_conflict
) {
2812 spin_unlock(&recall_lock
);
2815 atomic_inc(&fp
->fi_delegees
);
2816 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2817 spin_unlock(&recall_lock
);
2818 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2823 * Attempt to hand out a delegation.
2826 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_stateid
*stp
)
2828 struct nfs4_delegation
*dp
;
2829 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2831 int status
, flag
= 0;
2833 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2834 flag
= NFS4_OPEN_DELEGATE_NONE
;
2835 open
->op_recall
= 0;
2836 switch (open
->op_claim_type
) {
2837 case NFS4_OPEN_CLAIM_PREVIOUS
:
2839 open
->op_recall
= 1;
2840 flag
= open
->op_delegate_type
;
2841 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2844 case NFS4_OPEN_CLAIM_NULL
:
2845 /* Let's not give out any delegations till everyone's
2846 * had the chance to reclaim theirs.... */
2847 if (locks_in_grace())
2849 if (!cb_up
|| !oo
->oo_confirmed
)
2851 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2852 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2854 flag
= NFS4_OPEN_DELEGATE_READ
;
2860 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2863 status
= nfs4_set_delegation(dp
, flag
);
2867 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stateid
, sizeof(dp
->dl_stateid
));
2869 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2870 STATEID_VAL(&dp
->dl_stateid
));
2872 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2873 && flag
== NFS4_OPEN_DELEGATE_NONE
2874 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2875 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2876 open
->op_delegate_type
= flag
;
2879 nfs4_put_delegation(dp
);
2881 flag
= NFS4_OPEN_DELEGATE_NONE
;
2886 * called with nfs4_lock_state() held.
2889 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2891 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2892 struct nfs4_file
*fp
= NULL
;
2893 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2894 struct nfs4_stateid
*stp
= NULL
;
2895 struct nfs4_delegation
*dp
= NULL
;
2898 status
= nfserr_inval
;
2899 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2900 || !deny_valid(open
->op_share_deny
))
2903 * Lookup file; if found, lookup stateid and check open request,
2904 * and check for delegations in the process of being recalled.
2905 * If not found, create the nfs4_file struct
2907 fp
= find_file(ino
);
2909 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2911 status
= nfs4_check_deleg(fp
, open
, &dp
);
2915 status
= nfserr_bad_stateid
;
2916 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2918 status
= nfserr_jukebox
;
2919 fp
= alloc_init_file(ino
);
2925 * OPEN the file, or upgrade an existing OPEN.
2926 * If truncate fails, the OPEN fails.
2929 /* Stateid was found, this is an OPEN upgrade */
2930 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2934 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2937 init_stateid(stp
, fp
, open
);
2938 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2940 release_open_stateid(stp
);
2944 update_stateid(&stp
->st_stateid
);
2945 memcpy(&open
->op_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
2947 if (nfsd4_has_session(&resp
->cstate
))
2948 open
->op_openowner
->oo_confirmed
= 1;
2951 * Attempt to hand out a delegation. No error return, because the
2952 * OPEN succeeds even if we fail.
2954 nfs4_open_delegation(current_fh
, open
, stp
);
2958 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2959 STATEID_VAL(&stp
->st_stateid
));
2963 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2964 nfs4_set_claim_prev(open
);
2966 * To finish the open response, we just need to set the rflags.
2968 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2969 if (!open
->op_openowner
->oo_confirmed
&&
2970 !nfsd4_has_session(&resp
->cstate
))
2971 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2977 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2980 struct nfs4_client
*clp
;
2984 dprintk("process_renew(%08x/%08x): starting\n",
2985 clid
->cl_boot
, clid
->cl_id
);
2986 status
= nfserr_stale_clientid
;
2987 if (STALE_CLIENTID(clid
))
2989 clp
= find_confirmed_client(clid
);
2990 status
= nfserr_expired
;
2992 /* We assume the client took too long to RENEW. */
2993 dprintk("nfsd4_renew: clientid not found!\n");
2997 status
= nfserr_cb_path_down
;
2998 if (!list_empty(&clp
->cl_delegations
)
2999 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3003 nfs4_unlock_state();
3007 static struct lock_manager nfsd4_manager
= {
3011 nfsd4_end_grace(void)
3013 dprintk("NFSD: end of grace period\n");
3014 nfsd4_recdir_purge_old();
3015 locks_end_grace(&nfsd4_manager
);
3017 * Now that every NFSv4 client has had the chance to recover and
3018 * to see the (possibly new, possibly shorter) lease time, we
3019 * can safely set the next grace time to the current lease time:
3021 nfsd4_grace
= nfsd4_lease
;
3025 nfs4_laundromat(void)
3027 struct nfs4_client
*clp
;
3028 struct nfs4_openowner
*oo
;
3029 struct nfs4_delegation
*dp
;
3030 struct list_head
*pos
, *next
, reaplist
;
3031 time_t cutoff
= get_seconds() - nfsd4_lease
;
3032 time_t t
, clientid_val
= nfsd4_lease
;
3033 time_t u
, test_val
= nfsd4_lease
;
3037 dprintk("NFSD: laundromat service - starting\n");
3038 if (locks_in_grace())
3040 INIT_LIST_HEAD(&reaplist
);
3041 spin_lock(&client_lock
);
3042 list_for_each_safe(pos
, next
, &client_lru
) {
3043 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3044 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3045 t
= clp
->cl_time
- cutoff
;
3046 if (clientid_val
> t
)
3050 if (atomic_read(&clp
->cl_refcount
)) {
3051 dprintk("NFSD: client in use (clientid %08x)\n",
3052 clp
->cl_clientid
.cl_id
);
3055 unhash_client_locked(clp
);
3056 list_add(&clp
->cl_lru
, &reaplist
);
3058 spin_unlock(&client_lock
);
3059 list_for_each_safe(pos
, next
, &reaplist
) {
3060 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3061 dprintk("NFSD: purging unused client (clientid %08x)\n",
3062 clp
->cl_clientid
.cl_id
);
3063 nfsd4_remove_clid_dir(clp
);
3066 spin_lock(&recall_lock
);
3067 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3068 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3069 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3070 u
= dp
->dl_time
- cutoff
;
3075 list_move(&dp
->dl_recall_lru
, &reaplist
);
3077 spin_unlock(&recall_lock
);
3078 list_for_each_safe(pos
, next
, &reaplist
) {
3079 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3080 list_del_init(&dp
->dl_recall_lru
);
3081 unhash_delegation(dp
);
3083 test_val
= nfsd4_lease
;
3084 list_for_each_safe(pos
, next
, &close_lru
) {
3085 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3086 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3087 u
= oo
->oo_time
- cutoff
;
3092 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
3093 oo
->oo_owner
.so_id
);
3094 release_openowner(oo
);
3096 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3097 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3098 nfs4_unlock_state();
3099 return clientid_val
;
3102 static struct workqueue_struct
*laundry_wq
;
3103 static void laundromat_main(struct work_struct
*);
3104 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3107 laundromat_main(struct work_struct
*not_used
)
3111 t
= nfs4_laundromat();
3112 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3113 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3116 static struct nfs4_openowner
* search_close_lru(u32 st_id
)
3118 struct nfs4_openowner
*local
;
3120 list_for_each_entry(local
, &close_lru
, oo_close_lru
) {
3121 if (local
->oo_owner
.so_id
== st_id
)
3128 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_stateid
*stp
)
3130 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
3134 STALE_STATEID(stateid_t
*stateid
)
3136 if (stateid
->si_boot
== boot_time
)
3138 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3139 STATEID_VAL(stateid
));
3144 access_permit_read(unsigned long access_bmap
)
3146 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3147 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3148 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3152 access_permit_write(unsigned long access_bmap
)
3154 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3155 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3159 __be32
nfs4_check_openmode(struct nfs4_stateid
*stp
, int flags
)
3161 __be32 status
= nfserr_openmode
;
3163 /* For lock stateid's, we test the parent open, not the lock: */
3164 if (stp
->st_openstp
)
3165 stp
= stp
->st_openstp
;
3166 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3168 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3175 static inline __be32
3176 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3178 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3180 else if (locks_in_grace()) {
3181 /* Answer in remaining cases depends on existence of
3182 * conflicting state; so we must wait out the grace period. */
3183 return nfserr_grace
;
3184 } else if (flags
& WR_STATE
)
3185 return nfs4_share_conflict(current_fh
,
3186 NFS4_SHARE_DENY_WRITE
);
3187 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3188 return nfs4_share_conflict(current_fh
,
3189 NFS4_SHARE_DENY_READ
);
3193 * Allow READ/WRITE during grace period on recovered state only for files
3194 * that are not able to provide mandatory locking.
3197 grace_disallows_io(struct inode
*inode
)
3199 return locks_in_grace() && mandatory_lock(inode
);
3202 /* Returns true iff a is later than b: */
3203 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3205 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3208 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3211 * When sessions are used the stateid generation number is ignored
3214 if (has_session
&& in
->si_generation
== 0)
3217 if (in
->si_generation
== ref
->si_generation
)
3220 /* If the client sends us a stateid from the future, it's buggy: */
3221 if (stateid_generation_after(in
, ref
))
3222 return nfserr_bad_stateid
;
3224 * However, we could see a stateid from the past, even from a
3225 * non-buggy client. For example, if the client sends a lock
3226 * while some IO is outstanding, the lock may bump si_generation
3227 * while the IO is still in flight. The client could avoid that
3228 * situation by waiting for responses on all the IO requests,
3229 * but better performance may result in retrying IO that
3230 * receives an old_stateid error if requests are rarely
3231 * reordered in flight:
3233 return nfserr_old_stateid
;
3236 static int is_delegation_stateid(stateid_t
*stateid
)
3238 return stateid
->si_fileid
== 0;
3241 __be32
nfs4_validate_stateid(stateid_t
*stateid
, bool has_session
)
3243 struct nfs4_stateid
*stp
= NULL
;
3244 __be32 status
= nfserr_stale_stateid
;
3246 if (STALE_STATEID(stateid
))
3249 status
= nfserr_expired
;
3250 stp
= find_stateid(stateid
);
3253 status
= nfserr_bad_stateid
;
3254 if (stp
->st_stateowner
->so_is_open_owner
3255 && !openowner(stp
->st_stateowner
)->oo_confirmed
)
3258 status
= check_stateid_generation(stateid
, &stp
->st_stateid
, has_session
);
3268 * Checks for stateid operations
3271 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3272 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3274 struct nfs4_stateid
*stp
= NULL
;
3275 struct nfs4_delegation
*dp
= NULL
;
3276 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3277 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3283 if (grace_disallows_io(ino
))
3284 return nfserr_grace
;
3286 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3287 return check_special_stateids(current_fh
, stateid
, flags
);
3289 status
= nfserr_stale_stateid
;
3290 if (STALE_STATEID(stateid
))
3294 * We assume that any stateid that has the current boot time,
3295 * but that we can't find, is expired:
3297 status
= nfserr_expired
;
3298 if (is_delegation_stateid(stateid
)) {
3299 dp
= find_delegation_stateid(ino
, stateid
);
3302 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3305 status
= nfs4_check_delegmode(dp
, flags
);
3308 renew_client(dp
->dl_client
);
3310 *filpp
= dp
->dl_file
->fi_deleg_file
;
3313 } else { /* open or lock stateid */
3314 stp
= find_stateid(stateid
);
3317 status
= nfserr_bad_stateid
;
3318 if (nfs4_check_fh(current_fh
, stp
))
3320 if (stp
->st_stateowner
->so_is_open_owner
3321 && !openowner(stp
->st_stateowner
)->oo_confirmed
)
3323 status
= check_stateid_generation(stateid
, &stp
->st_stateid
,
3324 nfsd4_has_session(cstate
));
3327 status
= nfs4_check_openmode(stp
, flags
);
3330 renew_client(stp
->st_stateowner
->so_client
);
3332 if (flags
& RD_STATE
)
3333 *filpp
= find_readable_file(stp
->st_file
);
3335 *filpp
= find_writeable_file(stp
->st_file
);
3344 nfsd4_free_delegation_stateid(stateid_t
*stateid
)
3346 struct nfs4_delegation
*dp
= search_for_delegation(stateid
);
3348 return nfserr_locks_held
;
3349 return nfserr_bad_stateid
;
3353 nfsd4_free_lock_stateid(struct nfs4_stateid
*stp
)
3355 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3356 return nfserr_locks_held
;
3357 release_lock_stateid(stp
);
3362 * Test if the stateid is valid
3365 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3366 struct nfsd4_test_stateid
*test_stateid
)
3368 test_stateid
->ts_has_session
= nfsd4_has_session(cstate
);
3376 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3377 struct nfsd4_free_stateid
*free_stateid
)
3379 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3380 struct nfs4_stateid
*stp
;
3384 if (is_delegation_stateid(stateid
)) {
3385 ret
= nfsd4_free_delegation_stateid(stateid
);
3389 stp
= find_stateid(stateid
);
3391 ret
= nfserr_bad_stateid
;
3394 ret
= check_stateid_generation(stateid
, &stp
->st_stateid
, 1);
3398 if (stp
->st_type
== NFS4_OPEN_STID
) {
3399 ret
= nfserr_locks_held
;
3402 ret
= nfsd4_free_lock_stateid(stp
);
3407 nfs4_unlock_state();
3414 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3415 RD_STATE
: WR_STATE
;
3418 static __be32
nfs4_nospecial_stateid_checks(stateid_t
*stateid
)
3420 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3421 return nfserr_bad_stateid
;
3422 if (STALE_STATEID(stateid
))
3423 return nfserr_stale_stateid
;
3427 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_stateid
*stp
)
3429 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3430 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3433 if (nfs4_check_fh(current_fh
, stp
))
3434 return nfserr_bad_stateid
;
3435 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3438 return check_stateid_generation(stateid
, &stp
->st_stateid
, nfsd4_has_session(cstate
));
3442 * Checks for sequence id mutating operations.
3445 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3446 stateid_t
*stateid
, char typemask
,
3447 struct nfs4_stateid
**stpp
)
3451 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3452 seqid
, STATEID_VAL(stateid
));
3455 status
= nfs4_nospecial_stateid_checks(stateid
);
3458 *stpp
= find_stateid_by_type(stateid
, typemask
);
3460 return nfserr_expired
;
3461 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3462 renew_client((*stpp
)->st_stateowner
->so_client
);
3464 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3467 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_stateid
**stpp
)
3470 struct nfs4_openowner
*oo
;
3472 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3473 NFS4_OPEN_STID
, stpp
);
3476 oo
= openowner((*stpp
)->st_stateowner
);
3477 if (!oo
->oo_confirmed
)
3478 return nfserr_bad_stateid
;
3483 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3484 struct nfsd4_open_confirm
*oc
)
3487 struct nfs4_openowner
*oo
;
3488 struct nfs4_stateid
*stp
;
3490 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3491 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3492 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3494 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3500 status
= nfs4_preprocess_seqid_op(cstate
,
3501 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3502 NFS4_OPEN_STID
, &stp
);
3505 oo
= openowner(stp
->st_stateowner
);
3506 status
= nfserr_bad_stateid
;
3507 if (oo
->oo_confirmed
)
3509 oo
->oo_confirmed
= 1;
3510 update_stateid(&stp
->st_stateid
);
3511 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3512 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3513 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stateid
));
3515 nfsd4_create_clid_dir(oo
->oo_owner
.so_client
);
3518 if (!cstate
->replay_owner
)
3519 nfs4_unlock_state();
3523 static inline void nfs4_file_downgrade(struct nfs4_stateid
*stp
, unsigned int to_access
)
3527 for (i
= 1; i
< 4; i
++) {
3528 if (test_bit(i
, &stp
->st_access_bmap
) && !(i
& to_access
)) {
3529 nfs4_file_put_access(stp
->st_file
, i
);
3530 __clear_bit(i
, &stp
->st_access_bmap
);
3536 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3539 for (i
= 0; i
< 4; i
++) {
3540 if ((i
& deny
) != i
)
3541 __clear_bit(i
, bmap
);
3546 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3547 struct nfsd4_compound_state
*cstate
,
3548 struct nfsd4_open_downgrade
*od
)
3551 struct nfs4_stateid
*stp
;
3553 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3554 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3555 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3557 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3558 || !deny_valid(od
->od_share_deny
))
3559 return nfserr_inval
;
3562 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3563 &od
->od_stateid
, &stp
);
3566 status
= nfserr_inval
;
3567 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3568 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3569 stp
->st_access_bmap
, od
->od_share_access
);
3572 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3573 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3574 stp
->st_deny_bmap
, od
->od_share_deny
);
3577 nfs4_file_downgrade(stp
, od
->od_share_access
);
3579 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3581 update_stateid(&stp
->st_stateid
);
3582 memcpy(&od
->od_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3585 if (!cstate
->replay_owner
)
3586 nfs4_unlock_state();
3591 * nfs4_unlock_state() called after encode
3594 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3595 struct nfsd4_close
*close
)
3598 struct nfs4_openowner
*oo
;
3599 struct nfs4_stateid
*stp
;
3601 dprintk("NFSD: nfsd4_close on file %.*s\n",
3602 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3603 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3606 /* check close_lru for replay */
3607 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, close
->cl_seqid
,
3608 &close
->cl_stateid
, &stp
);
3609 if (stp
== NULL
&& status
== nfserr_expired
) {
3611 * Also, we should make sure this isn't just the result of
3614 oo
= search_close_lru(close
->cl_stateid
.si_stateownerid
);
3615 /* It's not stale; let's assume it's expired: */
3618 cstate
->replay_owner
= &oo
->oo_owner
;
3619 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, close
->cl_seqid
);
3622 status
= nfserr_bad_seqid
;
3626 oo
= openowner(stp
->st_stateowner
);
3628 update_stateid(&stp
->st_stateid
);
3629 memcpy(&close
->cl_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
3631 /* release_stateid() calls nfsd_close() if needed */
3632 release_open_stateid(stp
);
3634 /* place unused nfs4_stateowners on so_close_lru list to be
3635 * released by the laundromat service after the lease period
3636 * to enable us to handle CLOSE replay
3638 if (list_empty(&oo
->oo_owner
.so_stateids
))
3639 move_to_close_lru(oo
);
3641 if (!cstate
->replay_owner
)
3642 nfs4_unlock_state();
3647 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3648 struct nfsd4_delegreturn
*dr
)
3650 struct nfs4_delegation
*dp
;
3651 stateid_t
*stateid
= &dr
->dr_stateid
;
3652 struct inode
*inode
;
3655 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3657 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3660 status
= nfserr_bad_stateid
;
3661 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3663 status
= nfserr_stale_stateid
;
3664 if (STALE_STATEID(stateid
))
3666 status
= nfserr_bad_stateid
;
3667 if (!is_delegation_stateid(stateid
))
3669 status
= nfserr_expired
;
3670 dp
= find_delegation_stateid(inode
, stateid
);
3673 status
= check_stateid_generation(stateid
, &dp
->dl_stateid
, nfsd4_has_session(cstate
));
3676 renew_client(dp
->dl_client
);
3678 unhash_delegation(dp
);
3680 nfs4_unlock_state();
3687 * Lock owner state (byte-range locks)
3689 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3690 #define LOCK_HASH_BITS 8
3691 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3692 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3695 end_offset(u64 start
, u64 len
)
3700 return end
>= start
? end
: NFS4_MAX_UINT64
;
3703 /* last octet in a range */
3705 last_byte_offset(u64 start
, u64 len
)
3711 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3714 static unsigned int lockownerid_hashval(u32 id
)
3716 return id
& LOCK_HASH_MASK
;
3719 static inline unsigned int
3720 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3721 struct xdr_netobj
*ownername
)
3723 return (file_hashval(inode
) + cl_id
3724 + opaque_hashval(ownername
->data
, ownername
->len
))
3728 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3729 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3731 static struct nfs4_delegation
*
3732 search_for_delegation(stateid_t
*stid
)
3734 struct nfs4_file
*fp
;
3735 struct nfs4_delegation
*dp
;
3736 struct list_head
*pos
;
3739 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
3740 list_for_each_entry(fp
, &file_hashtbl
[i
], fi_hash
) {
3741 list_for_each(pos
, &fp
->fi_delegations
) {
3742 dp
= list_entry(pos
, struct nfs4_delegation
, dl_perfile
);
3743 if (same_stateid(&dp
->dl_stateid
, stid
))
3751 static struct nfs4_delegation
*
3752 find_delegation_stateid(struct inode
*ino
, stateid_t
*stid
)
3754 struct nfs4_file
*fp
;
3755 struct nfs4_delegation
*dl
;
3757 dprintk("NFSD: %s: stateid=" STATEID_FMT
"\n", __func__
,
3760 fp
= find_file(ino
);
3763 dl
= find_delegation_file(fp
, stid
);
3769 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3770 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3771 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3772 * locking, this prevents us from being completely protocol-compliant. The
3773 * real solution to this problem is to start using unsigned file offsets in
3774 * the VFS, but this is a very deep change!
3777 nfs4_transform_lock_offset(struct file_lock
*lock
)
3779 if (lock
->fl_start
< 0)
3780 lock
->fl_start
= OFFSET_MAX
;
3781 if (lock
->fl_end
< 0)
3782 lock
->fl_end
= OFFSET_MAX
;
3785 /* Hack!: For now, we're defining this just so we can use a pointer to it
3786 * as a unique cookie to identify our (NFSv4's) posix locks. */
3787 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3791 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3793 struct nfs4_lockowner
*lo
;
3795 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3796 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3797 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3798 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3799 if (!deny
->ld_owner
.data
)
3800 /* We just don't care that much */
3802 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3803 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3806 deny
->ld_owner
.len
= 0;
3807 deny
->ld_owner
.data
= NULL
;
3808 deny
->ld_clientid
.cl_boot
= 0;
3809 deny
->ld_clientid
.cl_id
= 0;
3811 deny
->ld_start
= fl
->fl_start
;
3812 deny
->ld_length
= NFS4_MAX_UINT64
;
3813 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3814 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3815 deny
->ld_type
= NFS4_READ_LT
;
3816 if (fl
->fl_type
!= F_RDLCK
)
3817 deny
->ld_type
= NFS4_WRITE_LT
;
3820 static struct nfs4_lockowner
*
3821 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3822 struct xdr_netobj
*owner
)
3824 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3825 struct nfs4_stateowner
*op
;
3827 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3828 if (same_owner_str(op
, owner
, clid
))
3829 return lockowner(op
);
3834 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
)
3836 unsigned int idhashval
;
3838 idhashval
= lockownerid_hashval(lo
->lo_owner
.so_id
);
3839 list_add(&lo
->lo_owner
.so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3840 list_add(&lo
->lo_owner
.so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3841 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3845 * Alloc a lock owner structure.
3846 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3849 * strhashval = lock_ownerstr_hashval
3852 static struct nfs4_lockowner
*
3853 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3854 struct nfs4_lockowner
*lo
;
3856 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3859 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3860 lo
->lo_owner
.so_is_open_owner
= 0;
3861 /* It is the openowner seqid that will be incremented in encode in the
3862 * case of new lockowners; so increment the lock seqid manually: */
3863 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3864 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3868 static struct nfs4_stateid
*
3869 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_stateid
*open_stp
)
3871 struct nfs4_stateid
*stp
;
3872 unsigned int hashval
= stateid_hashval(lo
->lo_owner
.so_id
, fp
->fi_id
);
3874 stp
= nfs4_alloc_stateid();
3877 INIT_LIST_HEAD(&stp
->st_hash
);
3878 INIT_LIST_HEAD(&stp
->st_perfile
);
3879 INIT_LIST_HEAD(&stp
->st_perstateowner
);
3880 INIT_LIST_HEAD(&stp
->st_lockowners
); /* not used */
3881 list_add(&stp
->st_hash
, &stateid_hashtbl
[hashval
]);
3882 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3883 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3884 stp
->st_stateowner
= &lo
->lo_owner
;
3885 stp
->st_type
= NFS4_LOCK_STID
;
3888 stp
->st_stateid
.si_boot
= boot_time
;
3889 stp
->st_stateid
.si_stateownerid
= lo
->lo_owner
.so_id
;
3890 stp
->st_stateid
.si_fileid
= fp
->fi_id
;
3891 /* note will be incremented before first return to client: */
3892 stp
->st_stateid
.si_generation
= 0;
3893 stp
->st_access_bmap
= 0;
3894 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3895 stp
->st_openstp
= open_stp
;
3902 check_lock_length(u64 offset
, u64 length
)
3904 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3905 LOFF_OVERFLOW(offset
, length
)));
3908 static void get_lock_access(struct nfs4_stateid
*lock_stp
, u32 access
)
3910 struct nfs4_file
*fp
= lock_stp
->st_file
;
3911 int oflag
= nfs4_access_to_omode(access
);
3913 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3915 nfs4_file_get_access(fp
, oflag
);
3916 __set_bit(access
, &lock_stp
->st_access_bmap
);
3923 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3924 struct nfsd4_lock
*lock
)
3926 struct nfs4_openowner
*open_sop
= NULL
;
3927 struct nfs4_lockowner
*lock_sop
= NULL
;
3928 struct nfs4_stateid
*lock_stp
;
3929 struct nfs4_file
*fp
;
3930 struct file
*filp
= NULL
;
3931 struct file_lock file_lock
;
3932 struct file_lock conflock
;
3934 unsigned int strhashval
;
3938 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3939 (long long) lock
->lk_offset
,
3940 (long long) lock
->lk_length
);
3942 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3943 return nfserr_inval
;
3945 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3946 S_IFREG
, NFSD_MAY_LOCK
))) {
3947 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3953 if (lock
->lk_is_new
) {
3955 * Client indicates that this is a new lockowner.
3956 * Use open owner and open stateid to create lock owner and
3959 struct nfs4_stateid
*open_stp
= NULL
;
3961 status
= nfserr_stale_clientid
;
3962 if (!nfsd4_has_session(cstate
) &&
3963 STALE_CLIENTID(&lock
->lk_new_clientid
))
3966 /* validate and update open stateid and open seqid */
3967 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
3968 lock
->lk_new_open_seqid
,
3969 &lock
->lk_new_open_stateid
,
3973 open_sop
= openowner(open_stp
->st_stateowner
);
3974 status
= nfserr_bad_stateid
;
3975 if (!nfsd4_has_session(cstate
) &&
3976 !same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
3977 &lock
->v
.new.clientid
))
3979 /* create lockowner and lock stateid */
3980 fp
= open_stp
->st_file
;
3981 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3982 open_sop
->oo_owner
.so_client
->cl_clientid
.cl_id
,
3983 &lock
->v
.new.owner
);
3984 /* XXX: Do we need to check for duplicate stateowners on
3985 * the same file, or should they just be allowed (and
3986 * create new stateids)? */
3987 status
= nfserr_jukebox
;
3988 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3989 open_sop
->oo_owner
.so_client
, open_stp
, lock
);
3990 if (lock_sop
== NULL
)
3992 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3993 if (lock_stp
== NULL
)
3996 /* lock (lock owner + lock stateid) already exists */
3997 status
= nfs4_preprocess_seqid_op(cstate
,
3998 lock
->lk_old_lock_seqid
,
3999 &lock
->lk_old_lock_stateid
,
4000 NFS4_LOCK_STID
, &lock_stp
);
4003 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4004 fp
= lock_stp
->st_file
;
4006 /* lock_sop and lock_stp have been created or found */
4008 lkflg
= setlkflg(lock
->lk_type
);
4009 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4013 status
= nfserr_grace
;
4014 if (locks_in_grace() && !lock
->lk_reclaim
)
4016 status
= nfserr_no_grace
;
4017 if (!locks_in_grace() && lock
->lk_reclaim
)
4020 locks_init_lock(&file_lock
);
4021 switch (lock
->lk_type
) {
4024 filp
= find_readable_file(lock_stp
->st_file
);
4026 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4027 file_lock
.fl_type
= F_RDLCK
;
4030 case NFS4_WRITEW_LT
:
4031 filp
= find_writeable_file(lock_stp
->st_file
);
4033 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4034 file_lock
.fl_type
= F_WRLCK
;
4037 status
= nfserr_inval
;
4041 status
= nfserr_openmode
;
4044 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4045 file_lock
.fl_pid
= current
->tgid
;
4046 file_lock
.fl_file
= filp
;
4047 file_lock
.fl_flags
= FL_POSIX
;
4048 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4050 file_lock
.fl_start
= lock
->lk_offset
;
4051 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4052 nfs4_transform_lock_offset(&file_lock
);
4055 * Try to lock the file in the VFS.
4056 * Note: locks.c uses the BKL to protect the inode's lock list.
4059 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4061 case 0: /* success! */
4062 update_stateid(&lock_stp
->st_stateid
);
4063 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stateid
,
4067 case (EAGAIN
): /* conflock holds conflicting lock */
4068 status
= nfserr_denied
;
4069 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4070 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4073 status
= nfserr_deadlock
;
4076 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4077 status
= nfserrno(err
);
4081 if (status
&& lock
->lk_is_new
&& lock_sop
)
4082 release_lockowner(lock_sop
);
4083 if (!cstate
->replay_owner
)
4084 nfs4_unlock_state();
4089 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4090 * so we do a temporary open here just to get an open file to pass to
4091 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4094 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4099 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4102 err
= vfs_test_lock(file
, lock
);
4111 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4112 struct nfsd4_lockt
*lockt
)
4114 struct inode
*inode
;
4115 struct file_lock file_lock
;
4116 struct nfs4_lockowner
*lo
;
4120 if (locks_in_grace())
4121 return nfserr_grace
;
4123 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4124 return nfserr_inval
;
4128 status
= nfserr_stale_clientid
;
4129 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4132 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4135 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4136 locks_init_lock(&file_lock
);
4137 switch (lockt
->lt_type
) {
4140 file_lock
.fl_type
= F_RDLCK
;
4143 case NFS4_WRITEW_LT
:
4144 file_lock
.fl_type
= F_WRLCK
;
4147 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4148 status
= nfserr_inval
;
4152 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4154 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4155 file_lock
.fl_pid
= current
->tgid
;
4156 file_lock
.fl_flags
= FL_POSIX
;
4158 file_lock
.fl_start
= lockt
->lt_offset
;
4159 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4161 nfs4_transform_lock_offset(&file_lock
);
4164 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4166 status
= nfserrno(error
);
4169 if (file_lock
.fl_type
!= F_UNLCK
) {
4170 status
= nfserr_denied
;
4171 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4174 nfs4_unlock_state();
4179 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4180 struct nfsd4_locku
*locku
)
4182 struct nfs4_stateid
*stp
;
4183 struct file
*filp
= NULL
;
4184 struct file_lock file_lock
;
4188 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4189 (long long) locku
->lu_offset
,
4190 (long long) locku
->lu_length
);
4192 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4193 return nfserr_inval
;
4197 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4198 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4201 filp
= find_any_file(stp
->st_file
);
4203 status
= nfserr_lock_range
;
4207 locks_init_lock(&file_lock
);
4208 file_lock
.fl_type
= F_UNLCK
;
4209 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4210 file_lock
.fl_pid
= current
->tgid
;
4211 file_lock
.fl_file
= filp
;
4212 file_lock
.fl_flags
= FL_POSIX
;
4213 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4214 file_lock
.fl_start
= locku
->lu_offset
;
4216 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4217 nfs4_transform_lock_offset(&file_lock
);
4220 * Try to unlock the file in the VFS.
4222 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4224 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4228 * OK, unlock succeeded; the only thing left to do is update the stateid.
4230 update_stateid(&stp
->st_stateid
);
4231 memcpy(&locku
->lu_stateid
, &stp
->st_stateid
, sizeof(stateid_t
));
4234 nfs4_unlock_state();
4238 status
= nfserrno(err
);
4244 * 1: locks held by lockowner
4245 * 0: no locks held by lockowner
4248 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4250 struct file_lock
**flpp
;
4251 struct inode
*inode
= filp
->fi_inode
;
4255 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4256 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4267 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4268 struct nfsd4_compound_state
*cstate
,
4269 struct nfsd4_release_lockowner
*rlockowner
)
4271 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4272 struct nfs4_stateowner
*sop
;
4273 struct nfs4_lockowner
*lo
;
4274 struct nfs4_stateid
*stp
;
4275 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4276 struct list_head matches
;
4280 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4281 clid
->cl_boot
, clid
->cl_id
);
4283 /* XXX check for lease expiration */
4285 status
= nfserr_stale_clientid
;
4286 if (STALE_CLIENTID(clid
))
4291 status
= nfserr_locks_held
;
4292 /* XXX: we're doing a linear search through all the lockowners.
4293 * Yipes! For now we'll just hope clients aren't really using
4294 * release_lockowner much, but eventually we have to fix these
4295 * data structures. */
4296 INIT_LIST_HEAD(&matches
);
4297 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4298 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4299 if (!same_owner_str(sop
, owner
, clid
))
4301 list_for_each_entry(stp
, &sop
->so_stateids
,
4303 lo
= lockowner(sop
);
4304 if (check_for_locks(stp
->st_file
, lo
))
4306 list_add(&lo
->lo_list
, &matches
);
4310 /* Clients probably won't expect us to return with some (but not all)
4311 * of the lockowner state released; so don't release any until all
4312 * have been checked. */
4314 while (!list_empty(&matches
)) {
4315 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4317 /* unhash_stateowner deletes so_perclient only
4318 * for openowners. */
4319 list_del(&lo
->lo_list
);
4320 release_lockowner(lo
);
4323 nfs4_unlock_state();
4327 static inline struct nfs4_client_reclaim
*
4330 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4334 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4336 unsigned int strhashval
= clientstr_hashval(name
);
4337 struct nfs4_client
*clp
;
4339 clp
= find_confirmed_client_by_str(name
, strhashval
);
4344 * failure => all reset bets are off, nfserr_no_grace...
4347 nfs4_client_to_reclaim(const char *name
)
4349 unsigned int strhashval
;
4350 struct nfs4_client_reclaim
*crp
= NULL
;
4352 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4353 crp
= alloc_reclaim();
4356 strhashval
= clientstr_hashval(name
);
4357 INIT_LIST_HEAD(&crp
->cr_strhash
);
4358 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4359 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4360 reclaim_str_hashtbl_size
++;
4365 nfs4_release_reclaim(void)
4367 struct nfs4_client_reclaim
*crp
= NULL
;
4370 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4371 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4372 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4373 struct nfs4_client_reclaim
, cr_strhash
);
4374 list_del(&crp
->cr_strhash
);
4376 reclaim_str_hashtbl_size
--;
4379 BUG_ON(reclaim_str_hashtbl_size
);
4383 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4384 static struct nfs4_client_reclaim
*
4385 nfs4_find_reclaim_client(clientid_t
*clid
)
4387 unsigned int strhashval
;
4388 struct nfs4_client
*clp
;
4389 struct nfs4_client_reclaim
*crp
= NULL
;
4392 /* find clientid in conf_id_hashtbl */
4393 clp
= find_confirmed_client(clid
);
4397 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4398 clp
->cl_name
.len
, clp
->cl_name
.data
,
4401 /* find clp->cl_name in reclaim_str_hashtbl */
4402 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4403 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4404 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4412 * Called from OPEN. Look for clientid in reclaim list.
4415 nfs4_check_open_reclaim(clientid_t
*clid
)
4417 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4420 /* initialization to perform at module load time: */
4423 nfs4_state_init(void)
4427 status
= nfsd4_init_slabs();
4430 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4431 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4432 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4433 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4434 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4435 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4437 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4438 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4439 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4440 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4442 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4443 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4444 INIT_LIST_HEAD(&open_ownerid_hashtbl
[i
]);
4446 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++)
4447 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4448 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4449 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4450 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4452 memset(&onestateid
, ~0, sizeof(stateid_t
));
4453 INIT_LIST_HEAD(&close_lru
);
4454 INIT_LIST_HEAD(&client_lru
);
4455 INIT_LIST_HEAD(&del_recall_lru
);
4456 reclaim_str_hashtbl_size
= 0;
4461 nfsd4_load_reboot_recovery_data(void)
4466 nfsd4_init_recdir();
4467 status
= nfsd4_recdir_load();
4468 nfs4_unlock_state();
4470 printk("NFSD: Failure reading reboot recovery data\n");
4474 * Since the lifetime of a delegation isn't limited to that of an open, a
4475 * client may quite reasonably hang on to a delegation as long as it has
4476 * the inode cached. This becomes an obvious problem the first time a
4477 * client's inode cache approaches the size of the server's total memory.
4479 * For now we avoid this problem by imposing a hard limit on the number
4480 * of delegations, which varies according to the server's memory size.
4483 set_max_delegations(void)
4486 * Allow at most 4 delegations per megabyte of RAM. Quick
4487 * estimates suggest that in the worst case (where every delegation
4488 * is for a different inode), a delegation could take about 1.5K,
4489 * giving a worst case usage of about 6% of memory.
4491 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4494 /* initialization to perform when the nfsd service is started: */
4497 __nfs4_state_start(void)
4501 boot_time
= get_seconds();
4502 locks_start_grace(&nfsd4_manager
);
4503 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4505 ret
= set_callback_cred();
4508 laundry_wq
= create_singlethread_workqueue("nfsd4");
4509 if (laundry_wq
== NULL
)
4511 ret
= nfsd4_create_callback_queue();
4513 goto out_free_laundry
;
4514 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4515 set_max_delegations();
4518 destroy_workqueue(laundry_wq
);
4523 nfs4_state_start(void)
4525 nfsd4_load_reboot_recovery_data();
4526 return __nfs4_state_start();
4530 __nfs4_state_shutdown(void)
4533 struct nfs4_client
*clp
= NULL
;
4534 struct nfs4_delegation
*dp
= NULL
;
4535 struct list_head
*pos
, *next
, reaplist
;
4537 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4538 while (!list_empty(&conf_id_hashtbl
[i
])) {
4539 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4542 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4543 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4547 INIT_LIST_HEAD(&reaplist
);
4548 spin_lock(&recall_lock
);
4549 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4550 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4551 list_move(&dp
->dl_recall_lru
, &reaplist
);
4553 spin_unlock(&recall_lock
);
4554 list_for_each_safe(pos
, next
, &reaplist
) {
4555 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4556 list_del_init(&dp
->dl_recall_lru
);
4557 unhash_delegation(dp
);
4560 nfsd4_shutdown_recdir();
4564 nfs4_state_shutdown(void)
4566 cancel_delayed_work_sync(&laundromat_work
);
4567 destroy_workqueue(laundry_wq
);
4568 locks_end_grace(&nfsd4_manager
);
4570 nfs4_release_reclaim();
4571 __nfs4_state_shutdown();
4572 nfs4_unlock_state();
4573 nfsd4_destroy_callback_queue();