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 int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
67 /* Currently used for almost all code touching nfsv4 state: */
68 static DEFINE_MUTEX(client_mutex
);
71 * Currently used for the del_recall_lru and file hash table. In an
72 * effort to decrease the scope of the client_mutex, this spinlock may
73 * eventually cover more:
75 static DEFINE_SPINLOCK(recall_lock
);
77 static struct kmem_cache
*openowner_slab
= NULL
;
78 static struct kmem_cache
*lockowner_slab
= NULL
;
79 static struct kmem_cache
*file_slab
= NULL
;
80 static struct kmem_cache
*stateid_slab
= NULL
;
81 static struct kmem_cache
*deleg_slab
= NULL
;
86 mutex_lock(&client_mutex
);
90 nfs4_unlock_state(void)
92 mutex_unlock(&client_mutex
);
96 opaque_hashval(const void *ptr
, int nbytes
)
98 unsigned char *cptr
= (unsigned char *) ptr
;
108 static struct list_head del_recall_lru
;
111 put_nfs4_file(struct nfs4_file
*fi
)
113 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
114 list_del(&fi
->fi_hash
);
115 spin_unlock(&recall_lock
);
117 kmem_cache_free(file_slab
, fi
);
122 get_nfs4_file(struct nfs4_file
*fi
)
124 atomic_inc(&fi
->fi_ref
);
127 static int num_delegations
;
128 unsigned int max_delegations
;
131 * Open owner state (share locks)
134 /* hash tables for open owners */
135 #define OPEN_OWNER_HASH_BITS 8
136 #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS)
137 #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1)
139 static unsigned int open_ownerid_hashval(const u32 id
)
141 return id
& OPEN_OWNER_HASH_MASK
;
144 static unsigned int open_ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
148 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
150 return ret
& OPEN_OWNER_HASH_MASK
;
153 static struct list_head open_ownerid_hashtbl
[OPEN_OWNER_HASH_SIZE
];
154 static struct list_head open_ownerstr_hashtbl
[OPEN_OWNER_HASH_SIZE
];
156 /* hash table for nfs4_file */
157 #define FILE_HASH_BITS 8
158 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
160 /* hash table for (open)nfs4_ol_stateid */
161 #define STATEID_HASH_BITS 10
162 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
163 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
165 static unsigned int file_hashval(struct inode
*ino
)
167 /* XXX: why are we hashing on inode pointer, anyway? */
168 return hash_ptr(ino
, FILE_HASH_BITS
);
171 static unsigned int stateid_hashval(stateid_t
*s
)
173 return opaque_hashval(&s
->si_opaque
, sizeof(stateid_opaque_t
)) & STATEID_HASH_MASK
;
176 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
177 static struct list_head stateid_hashtbl
[STATEID_HASH_SIZE
];
179 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
181 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
182 atomic_inc(&fp
->fi_access
[oflag
]);
185 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
187 if (oflag
== O_RDWR
) {
188 __nfs4_file_get_access(fp
, O_RDONLY
);
189 __nfs4_file_get_access(fp
, O_WRONLY
);
191 __nfs4_file_get_access(fp
, oflag
);
194 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
196 if (fp
->fi_fds
[oflag
]) {
197 fput(fp
->fi_fds
[oflag
]);
198 fp
->fi_fds
[oflag
] = NULL
;
202 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
204 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
205 nfs4_file_put_fd(fp
, O_RDWR
);
206 nfs4_file_put_fd(fp
, oflag
);
210 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
212 if (oflag
== O_RDWR
) {
213 __nfs4_file_put_access(fp
, O_RDONLY
);
214 __nfs4_file_put_access(fp
, O_WRONLY
);
216 __nfs4_file_put_access(fp
, oflag
);
219 static inline void hash_stid(struct nfs4_stid
*stid
)
221 stateid_t
*s
= &stid
->sc_stateid
;
222 unsigned int hashval
;
224 hashval
= stateid_hashval(s
);
225 list_add(&stid
->sc_hash
, &stateid_hashtbl
[hashval
]);
228 static struct nfs4_delegation
*
229 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
231 struct nfs4_delegation
*dp
;
232 struct nfs4_file
*fp
= stp
->st_file
;
234 dprintk("NFSD alloc_init_deleg\n");
236 * Major work on the lease subsystem (for example, to support
237 * calbacks on stat) will be required before we can support
238 * write delegations properly.
240 if (type
!= NFS4_OPEN_DELEGATE_READ
)
242 if (fp
->fi_had_conflict
)
244 if (num_delegations
> max_delegations
)
246 dp
= kmem_cache_alloc(deleg_slab
, GFP_KERNEL
);
250 INIT_LIST_HEAD(&dp
->dl_perfile
);
251 INIT_LIST_HEAD(&dp
->dl_perclnt
);
252 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
257 dp
->dl_stid
.sc_type
= NFS4_DELEG_STID
;
258 dp
->dl_stid
.sc_stateid
.si_boot
= boot_time
;
259 dp
->dl_stid
.sc_stateid
.si_stateownerid
= current_delegid
++;
260 dp
->dl_stid
.sc_stateid
.si_fileid
= 0;
261 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
262 hash_stid(&dp
->dl_stid
);
263 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
265 atomic_set(&dp
->dl_count
, 1);
266 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
271 nfs4_put_delegation(struct nfs4_delegation
*dp
)
273 if (atomic_dec_and_test(&dp
->dl_count
)) {
274 dprintk("NFSD: freeing dp %p\n",dp
);
275 put_nfs4_file(dp
->dl_file
);
276 kmem_cache_free(deleg_slab
, dp
);
281 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
283 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
284 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
286 fput(fp
->fi_deleg_file
);
287 fp
->fi_deleg_file
= NULL
;
291 /* Called under the state lock. */
293 unhash_delegation(struct nfs4_delegation
*dp
)
295 list_del_init(&dp
->dl_stid
.sc_hash
);
296 list_del_init(&dp
->dl_perclnt
);
297 spin_lock(&recall_lock
);
298 list_del_init(&dp
->dl_perfile
);
299 list_del_init(&dp
->dl_recall_lru
);
300 spin_unlock(&recall_lock
);
301 nfs4_put_deleg_lease(dp
->dl_file
);
302 nfs4_put_delegation(dp
);
309 /* client_lock protects the client lru list and session hash table */
310 static DEFINE_SPINLOCK(client_lock
);
312 /* Hash tables for nfs4_clientid state */
313 #define CLIENT_HASH_BITS 4
314 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
315 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
317 static unsigned int clientid_hashval(u32 id
)
319 return id
& CLIENT_HASH_MASK
;
322 static unsigned int clientstr_hashval(const char *name
)
324 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
328 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
329 * used in reboot/reset lease grace period processing
331 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
332 * setclientid_confirmed info.
334 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
337 * client_lru holds client queue ordered by nfs4_client.cl_time
340 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
341 * for last close replay.
343 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
344 static int reclaim_str_hashtbl_size
= 0;
345 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
346 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
347 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
348 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
349 static struct list_head client_lru
;
350 static struct list_head close_lru
;
353 * We store the NONE, READ, WRITE, and BOTH bits separately in the
354 * st_{access,deny}_bmap field of the stateid, in order to track not
355 * only what share bits are currently in force, but also what
356 * combinations of share bits previous opens have used. This allows us
357 * to enforce the recommendation of rfc 3530 14.2.19 that the server
358 * return an error if the client attempt to downgrade to a combination
359 * of share bits not explicable by closing some of its previous opens.
361 * XXX: This enforcement is actually incomplete, since we don't keep
362 * track of access/deny bit combinations; so, e.g., we allow:
364 * OPEN allow read, deny write
365 * OPEN allow both, deny none
366 * DOWNGRADE allow read, deny none
368 * which we should reject.
371 set_access(unsigned int *access
, unsigned long bmap
) {
375 for (i
= 1; i
< 4; i
++) {
376 if (test_bit(i
, &bmap
))
382 set_deny(unsigned int *deny
, unsigned long bmap
) {
386 for (i
= 0; i
< 4; i
++) {
387 if (test_bit(i
, &bmap
))
393 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
394 unsigned int access
, deny
;
396 set_access(&access
, stp
->st_access_bmap
);
397 set_deny(&deny
, stp
->st_deny_bmap
);
398 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
403 static int nfs4_access_to_omode(u32 access
)
405 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
406 case NFS4_SHARE_ACCESS_READ
:
408 case NFS4_SHARE_ACCESS_WRITE
:
410 case NFS4_SHARE_ACCESS_BOTH
:
416 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
418 list_del(&stp
->st_stid
.sc_hash
);
419 list_del(&stp
->st_perfile
);
420 list_del(&stp
->st_perstateowner
);
423 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
427 if (stp
->st_access_bmap
) {
428 for (i
= 1; i
< 4; i
++) {
429 if (test_bit(i
, &stp
->st_access_bmap
))
430 nfs4_file_put_access(stp
->st_file
,
431 nfs4_access_to_omode(i
));
432 __clear_bit(i
, &stp
->st_access_bmap
);
435 put_nfs4_file(stp
->st_file
);
439 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
441 close_generic_stateid(stp
);
442 kmem_cache_free(stateid_slab
, stp
);
445 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
449 unhash_generic_stateid(stp
);
450 file
= find_any_file(stp
->st_file
);
452 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
453 free_generic_stateid(stp
);
456 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
458 struct nfs4_ol_stateid
*stp
;
460 list_del(&lo
->lo_owner
.so_idhash
);
461 list_del(&lo
->lo_owner
.so_strhash
);
462 list_del(&lo
->lo_perstateid
);
463 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
464 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
465 struct nfs4_ol_stateid
, st_perstateowner
);
466 release_lock_stateid(stp
);
470 static void release_lockowner(struct nfs4_lockowner
*lo
)
472 unhash_lockowner(lo
);
473 nfs4_free_lockowner(lo
);
477 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
479 struct nfs4_lockowner
*lo
;
481 while (!list_empty(&open_stp
->st_lockowners
)) {
482 lo
= list_entry(open_stp
->st_lockowners
.next
,
483 struct nfs4_lockowner
, lo_perstateid
);
484 release_lockowner(lo
);
488 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
490 unhash_generic_stateid(stp
);
491 release_stateid_lockowners(stp
);
492 free_generic_stateid(stp
);
495 static void unhash_openowner(struct nfs4_openowner
*oo
)
497 struct nfs4_ol_stateid
*stp
;
499 list_del(&oo
->oo_owner
.so_idhash
);
500 list_del(&oo
->oo_owner
.so_strhash
);
501 list_del(&oo
->oo_perclient
);
502 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
503 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
504 struct nfs4_ol_stateid
, st_perstateowner
);
505 release_open_stateid(stp
);
509 static void release_openowner(struct nfs4_openowner
*oo
)
511 unhash_openowner(oo
);
512 list_del(&oo
->oo_close_lru
);
513 nfs4_free_openowner(oo
);
516 #define SESSION_HASH_SIZE 512
517 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
520 hash_sessionid(struct nfs4_sessionid
*sessionid
)
522 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
524 return sid
->sequence
% SESSION_HASH_SIZE
;
528 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
530 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
531 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
535 gen_sessionid(struct nfsd4_session
*ses
)
537 struct nfs4_client
*clp
= ses
->se_client
;
538 struct nfsd4_sessionid
*sid
;
540 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
541 sid
->clientid
= clp
->cl_clientid
;
542 sid
->sequence
= current_sessionid
++;
547 * The protocol defines ca_maxresponssize_cached to include the size of
548 * the rpc header, but all we need to cache is the data starting after
549 * the end of the initial SEQUENCE operation--the rest we regenerate
550 * each time. Therefore we can advertise a ca_maxresponssize_cached
551 * value that is the number of bytes in our cache plus a few additional
552 * bytes. In order to stay on the safe side, and not promise more than
553 * we can cache, those additional bytes must be the minimum possible: 24
554 * bytes of rpc header (xid through accept state, with AUTH_NULL
555 * verifier), 12 for the compound header (with zero-length tag), and 44
556 * for the SEQUENCE op response:
558 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
561 free_session_slots(struct nfsd4_session
*ses
)
565 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
566 kfree(ses
->se_slots
[i
]);
570 * We don't actually need to cache the rpc and session headers, so we
571 * can allocate a little less for each slot:
573 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
575 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
578 static int nfsd4_sanitize_slot_size(u32 size
)
580 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
581 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
587 * XXX: If we run out of reserved DRC memory we could (up to a point)
588 * re-negotiate active sessions and reduce their slot usage to make
589 * rooom for new connections. For now we just fail the create session.
591 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
595 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
597 spin_lock(&nfsd_drc_lock
);
598 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
599 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
600 num
= min_t(int, num
, avail
/ slotsize
);
601 nfsd_drc_mem_used
+= num
* slotsize
;
602 spin_unlock(&nfsd_drc_lock
);
607 static void nfsd4_put_drc_mem(int slotsize
, int num
)
609 spin_lock(&nfsd_drc_lock
);
610 nfsd_drc_mem_used
-= slotsize
* num
;
611 spin_unlock(&nfsd_drc_lock
);
614 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
616 struct nfsd4_session
*new;
619 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
620 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
621 mem
= numslots
* sizeof(struct nfsd4_slot
*);
623 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
626 /* allocate each struct nfsd4_slot and data cache in one piece */
627 for (i
= 0; i
< numslots
; i
++) {
628 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
629 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
630 if (!new->se_slots
[i
])
636 kfree(new->se_slots
[i
]);
641 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
643 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
645 new->maxreqs
= numslots
;
646 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
647 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
648 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
649 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
650 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
653 static void free_conn(struct nfsd4_conn
*c
)
655 svc_xprt_put(c
->cn_xprt
);
659 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
661 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
662 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
664 spin_lock(&clp
->cl_lock
);
665 if (!list_empty(&c
->cn_persession
)) {
666 list_del(&c
->cn_persession
);
669 spin_unlock(&clp
->cl_lock
);
670 nfsd4_probe_callback(clp
);
673 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
675 struct nfsd4_conn
*conn
;
677 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
680 svc_xprt_get(rqstp
->rq_xprt
);
681 conn
->cn_xprt
= rqstp
->rq_xprt
;
682 conn
->cn_flags
= flags
;
683 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
687 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
689 conn
->cn_session
= ses
;
690 list_add(&conn
->cn_persession
, &ses
->se_conns
);
693 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
695 struct nfs4_client
*clp
= ses
->se_client
;
697 spin_lock(&clp
->cl_lock
);
698 __nfsd4_hash_conn(conn
, ses
);
699 spin_unlock(&clp
->cl_lock
);
702 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
704 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
705 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
708 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
710 struct nfsd4_conn
*conn
;
713 conn
= alloc_conn(rqstp
, dir
);
715 return nfserr_jukebox
;
716 nfsd4_hash_conn(conn
, ses
);
717 ret
= nfsd4_register_conn(conn
);
719 /* oops; xprt is already down: */
720 nfsd4_conn_lost(&conn
->cn_xpt_user
);
724 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
726 u32 dir
= NFS4_CDFC4_FORE
;
728 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
729 dir
|= NFS4_CDFC4_BACK
;
731 return nfsd4_new_conn(rqstp
, ses
, dir
);
734 /* must be called under client_lock */
735 static void nfsd4_del_conns(struct nfsd4_session
*s
)
737 struct nfs4_client
*clp
= s
->se_client
;
738 struct nfsd4_conn
*c
;
740 spin_lock(&clp
->cl_lock
);
741 while (!list_empty(&s
->se_conns
)) {
742 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
743 list_del_init(&c
->cn_persession
);
744 spin_unlock(&clp
->cl_lock
);
746 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
749 spin_lock(&clp
->cl_lock
);
751 spin_unlock(&clp
->cl_lock
);
754 void free_session(struct kref
*kref
)
756 struct nfsd4_session
*ses
;
759 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
760 nfsd4_del_conns(ses
);
761 spin_lock(&nfsd_drc_lock
);
762 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
763 nfsd_drc_mem_used
-= mem
;
764 spin_unlock(&nfsd_drc_lock
);
765 free_session_slots(ses
);
769 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
771 struct nfsd4_session
*new;
772 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
773 int numslots
, slotsize
;
778 * Note decreasing slot size below client's request may
779 * make it difficult for client to function correctly, whereas
780 * decreasing the number of slots will (just?) affect
781 * performance. When short on memory we therefore prefer to
782 * decrease number of slots instead of their size.
784 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
785 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
789 new = alloc_session(slotsize
, numslots
);
791 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
794 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
796 new->se_client
= clp
;
799 INIT_LIST_HEAD(&new->se_conns
);
801 new->se_cb_seq_nr
= 1;
802 new->se_flags
= cses
->flags
;
803 new->se_cb_prog
= cses
->callback_prog
;
804 kref_init(&new->se_ref
);
805 idx
= hash_sessionid(&new->se_sessionid
);
806 spin_lock(&client_lock
);
807 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
808 spin_lock(&clp
->cl_lock
);
809 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
810 spin_unlock(&clp
->cl_lock
);
811 spin_unlock(&client_lock
);
813 status
= nfsd4_new_conn_from_crses(rqstp
, new);
814 /* whoops: benny points out, status is ignored! (err, or bogus) */
816 free_session(&new->se_ref
);
819 if (cses
->flags
& SESSION4_BACK_CHAN
) {
820 struct sockaddr
*sa
= svc_addr(rqstp
);
822 * This is a little silly; with sessions there's no real
823 * use for the callback address. Use the peer address
824 * as a reasonable default for now, but consider fixing
825 * the rpc client not to require an address in the
828 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
829 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
831 nfsd4_probe_callback(clp
);
835 /* caller must hold client_lock */
836 static struct nfsd4_session
*
837 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
839 struct nfsd4_session
*elem
;
842 dump_sessionid(__func__
, sessionid
);
843 idx
= hash_sessionid(sessionid
);
844 /* Search in the appropriate list */
845 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
846 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
847 NFS4_MAX_SESSIONID_LEN
)) {
852 dprintk("%s: session not found\n", __func__
);
856 /* caller must hold client_lock */
858 unhash_session(struct nfsd4_session
*ses
)
860 list_del(&ses
->se_hash
);
861 spin_lock(&ses
->se_client
->cl_lock
);
862 list_del(&ses
->se_perclnt
);
863 spin_unlock(&ses
->se_client
->cl_lock
);
866 /* must be called under the client_lock */
868 renew_client_locked(struct nfs4_client
*clp
)
870 if (is_client_expired(clp
)) {
871 dprintk("%s: client (clientid %08x/%08x) already expired\n",
873 clp
->cl_clientid
.cl_boot
,
874 clp
->cl_clientid
.cl_id
);
879 * Move client to the end to the LRU list.
881 dprintk("renewing client (clientid %08x/%08x)\n",
882 clp
->cl_clientid
.cl_boot
,
883 clp
->cl_clientid
.cl_id
);
884 list_move_tail(&clp
->cl_lru
, &client_lru
);
885 clp
->cl_time
= get_seconds();
889 renew_client(struct nfs4_client
*clp
)
891 spin_lock(&client_lock
);
892 renew_client_locked(clp
);
893 spin_unlock(&client_lock
);
896 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
898 STALE_CLIENTID(clientid_t
*clid
)
900 if (clid
->cl_boot
== boot_time
)
902 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
903 clid
->cl_boot
, clid
->cl_id
, boot_time
);
908 * XXX Should we use a slab cache ?
909 * This type of memory management is somewhat inefficient, but we use it
910 * anyway since SETCLIENTID is not a common operation.
912 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
914 struct nfs4_client
*clp
;
916 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
919 clp
->cl_name
.data
= kmalloc(name
.len
, GFP_KERNEL
);
920 if (clp
->cl_name
.data
== NULL
) {
924 memcpy(clp
->cl_name
.data
, name
.data
, name
.len
);
925 clp
->cl_name
.len
= name
.len
;
930 free_client(struct nfs4_client
*clp
)
932 while (!list_empty(&clp
->cl_sessions
)) {
933 struct nfsd4_session
*ses
;
934 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
936 list_del(&ses
->se_perclnt
);
937 nfsd4_put_session(ses
);
939 if (clp
->cl_cred
.cr_group_info
)
940 put_group_info(clp
->cl_cred
.cr_group_info
);
941 kfree(clp
->cl_principal
);
942 kfree(clp
->cl_name
.data
);
947 release_session_client(struct nfsd4_session
*session
)
949 struct nfs4_client
*clp
= session
->se_client
;
951 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
953 if (is_client_expired(clp
)) {
955 session
->se_client
= NULL
;
957 renew_client_locked(clp
);
958 spin_unlock(&client_lock
);
961 /* must be called under the client_lock */
963 unhash_client_locked(struct nfs4_client
*clp
)
965 struct nfsd4_session
*ses
;
967 mark_client_expired(clp
);
968 list_del(&clp
->cl_lru
);
969 spin_lock(&clp
->cl_lock
);
970 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
971 list_del_init(&ses
->se_hash
);
972 spin_unlock(&clp
->cl_lock
);
976 expire_client(struct nfs4_client
*clp
)
978 struct nfs4_openowner
*oo
;
979 struct nfs4_delegation
*dp
;
980 struct list_head reaplist
;
982 INIT_LIST_HEAD(&reaplist
);
983 spin_lock(&recall_lock
);
984 while (!list_empty(&clp
->cl_delegations
)) {
985 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
986 list_del_init(&dp
->dl_perclnt
);
987 list_move(&dp
->dl_recall_lru
, &reaplist
);
989 spin_unlock(&recall_lock
);
990 while (!list_empty(&reaplist
)) {
991 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
992 list_del_init(&dp
->dl_recall_lru
);
993 unhash_delegation(dp
);
995 while (!list_empty(&clp
->cl_openowners
)) {
996 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
997 release_openowner(oo
);
999 nfsd4_shutdown_callback(clp
);
1000 if (clp
->cl_cb_conn
.cb_xprt
)
1001 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1002 list_del(&clp
->cl_idhash
);
1003 list_del(&clp
->cl_strhash
);
1004 spin_lock(&client_lock
);
1005 unhash_client_locked(clp
);
1006 if (atomic_read(&clp
->cl_refcount
) == 0)
1008 spin_unlock(&client_lock
);
1011 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1013 memcpy(target
->cl_verifier
.data
, source
->data
,
1014 sizeof(target
->cl_verifier
.data
));
1017 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1019 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1020 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1023 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1025 target
->cr_uid
= source
->cr_uid
;
1026 target
->cr_gid
= source
->cr_gid
;
1027 target
->cr_group_info
= source
->cr_group_info
;
1028 get_group_info(target
->cr_group_info
);
1031 static int same_name(const char *n1
, const char *n2
)
1033 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1037 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1039 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1043 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1045 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1048 /* XXX what about NGROUP */
1050 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1052 return cr1
->cr_uid
== cr2
->cr_uid
;
1055 static void gen_clid(struct nfs4_client
*clp
)
1057 static u32 current_clientid
= 1;
1059 clp
->cl_clientid
.cl_boot
= boot_time
;
1060 clp
->cl_clientid
.cl_id
= current_clientid
++;
1063 static void gen_confirm(struct nfs4_client
*clp
)
1068 p
= (u32
*)clp
->cl_confirm
.data
;
1069 *p
++ = get_seconds();
1074 same_stateid(stateid_t
*id_one
, stateid_t
*id_two
)
1076 if (id_one
->si_stateownerid
!= id_two
->si_stateownerid
)
1078 return id_one
->si_fileid
== id_two
->si_fileid
;
1081 static struct nfs4_stid
*find_stateid(stateid_t
*t
)
1083 struct nfs4_stid
*s
;
1084 unsigned int hashval
;
1086 hashval
= stateid_hashval(t
);
1087 list_for_each_entry(s
, &stateid_hashtbl
[hashval
], sc_hash
)
1088 if (same_stateid(&s
->sc_stateid
, t
))
1093 static struct nfs4_ol_stateid
*find_ol_stateid(stateid_t
*t
)
1095 struct nfs4_stid
*s
;
1097 s
= find_stateid(t
);
1100 return openlockstateid(s
);
1103 static struct nfs4_stid
*find_stateid_by_type(stateid_t
*t
, char typemask
)
1105 struct nfs4_stid
*s
;
1107 s
= find_stateid(t
);
1110 if (typemask
& s
->sc_type
)
1115 static struct nfs4_ol_stateid
*find_ol_stateid_by_type(stateid_t
*t
, char typemask
)
1117 struct nfs4_stid
*s
;
1119 s
= find_stateid_by_type(t
, typemask
);
1122 return openlockstateid(s
);
1125 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1126 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1128 struct nfs4_client
*clp
;
1129 struct sockaddr
*sa
= svc_addr(rqstp
);
1132 clp
= alloc_client(name
);
1136 INIT_LIST_HEAD(&clp
->cl_sessions
);
1138 princ
= svc_gss_principal(rqstp
);
1140 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1141 if (clp
->cl_principal
== NULL
) {
1147 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1148 atomic_set(&clp
->cl_refcount
, 0);
1149 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1150 INIT_LIST_HEAD(&clp
->cl_idhash
);
1151 INIT_LIST_HEAD(&clp
->cl_strhash
);
1152 INIT_LIST_HEAD(&clp
->cl_openowners
);
1153 INIT_LIST_HEAD(&clp
->cl_delegations
);
1154 INIT_LIST_HEAD(&clp
->cl_lru
);
1155 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1156 spin_lock_init(&clp
->cl_lock
);
1157 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1158 clp
->cl_time
= get_seconds();
1159 clear_bit(0, &clp
->cl_cb_slot_busy
);
1160 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1161 copy_verf(clp
, verf
);
1162 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1163 clp
->cl_flavor
= rqstp
->rq_flavor
;
1164 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1166 clp
->cl_cb_session
= NULL
;
1170 static int check_name(struct xdr_netobj name
)
1174 if (name
.len
> NFS4_OPAQUE_LIMIT
) {
1175 dprintk("NFSD: check_name: name too long(%d)!\n", name
.len
);
1182 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1184 unsigned int idhashval
;
1186 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1187 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1188 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1193 move_to_confirmed(struct nfs4_client
*clp
)
1195 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1196 unsigned int strhashval
;
1198 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1199 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1200 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1201 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1205 static struct nfs4_client
*
1206 find_confirmed_client(clientid_t
*clid
)
1208 struct nfs4_client
*clp
;
1209 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1211 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1212 if (same_clid(&clp
->cl_clientid
, clid
))
1218 static struct nfs4_client
*
1219 find_unconfirmed_client(clientid_t
*clid
)
1221 struct nfs4_client
*clp
;
1222 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1224 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1225 if (same_clid(&clp
->cl_clientid
, clid
))
1231 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1233 return clp
->cl_exchange_flags
!= 0;
1236 static struct nfs4_client
*
1237 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1239 struct nfs4_client
*clp
;
1241 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1242 if (same_name(clp
->cl_recdir
, dname
))
1248 static struct nfs4_client
*
1249 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1251 struct nfs4_client
*clp
;
1253 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1254 if (same_name(clp
->cl_recdir
, dname
))
1260 static void rpc_svcaddr2sockaddr(struct sockaddr
*sa
, unsigned short family
, union svc_addr_u
*svcaddr
)
1264 ((struct sockaddr_in
*)sa
)->sin_family
= AF_INET
;
1265 ((struct sockaddr_in
*)sa
)->sin_addr
= svcaddr
->addr
;
1268 ((struct sockaddr_in6
*)sa
)->sin6_family
= AF_INET6
;
1269 ((struct sockaddr_in6
*)sa
)->sin6_addr
= svcaddr
->addr6
;
1275 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1277 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1278 struct sockaddr
*sa
= svc_addr(rqstp
);
1279 u32 scopeid
= rpc_get_scope_id(sa
);
1280 unsigned short expected_family
;
1282 /* Currently, we only support tcp and tcp6 for the callback channel */
1283 if (se
->se_callback_netid_len
== 3 &&
1284 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1285 expected_family
= AF_INET
;
1286 else if (se
->se_callback_netid_len
== 4 &&
1287 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1288 expected_family
= AF_INET6
;
1292 conn
->cb_addrlen
= rpc_uaddr2sockaddr(se
->se_callback_addr_val
,
1293 se
->se_callback_addr_len
,
1294 (struct sockaddr
*)&conn
->cb_addr
,
1295 sizeof(conn
->cb_addr
));
1297 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1300 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1301 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1303 conn
->cb_prog
= se
->se_callback_prog
;
1304 conn
->cb_ident
= se
->se_callback_ident
;
1305 rpc_svcaddr2sockaddr((struct sockaddr
*)&conn
->cb_saddr
, expected_family
, &rqstp
->rq_daddr
);
1308 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1309 conn
->cb_addrlen
= 0;
1310 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1311 "will not receive delegations\n",
1312 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1318 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1321 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1323 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1326 dprintk("--> %s slot %p\n", __func__
, slot
);
1328 slot
->sl_opcnt
= resp
->opcnt
;
1329 slot
->sl_status
= resp
->cstate
.status
;
1331 if (nfsd4_not_cached(resp
)) {
1332 slot
->sl_datalen
= 0;
1335 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1336 base
= (char *)resp
->cstate
.datap
-
1337 (char *)resp
->xbuf
->head
[0].iov_base
;
1338 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1340 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1345 * Encode the replay sequence operation from the slot values.
1346 * If cachethis is FALSE encode the uncached rep error on the next
1347 * operation which sets resp->p and increments resp->opcnt for
1348 * nfs4svc_encode_compoundres.
1352 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1353 struct nfsd4_compoundres
*resp
)
1355 struct nfsd4_op
*op
;
1356 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1358 dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__
,
1359 resp
->opcnt
, resp
->cstate
.slot
->sl_cachethis
);
1361 /* Encode the replayed sequence operation */
1362 op
= &args
->ops
[resp
->opcnt
- 1];
1363 nfsd4_encode_operation(resp
, op
);
1365 /* Return nfserr_retry_uncached_rep in next operation. */
1366 if (args
->opcnt
> 1 && slot
->sl_cachethis
== 0) {
1367 op
= &args
->ops
[resp
->opcnt
++];
1368 op
->status
= nfserr_retry_uncached_rep
;
1369 nfsd4_encode_operation(resp
, op
);
1375 * The sequence operation is not cached because we can use the slot and
1379 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1380 struct nfsd4_sequence
*seq
)
1382 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1385 dprintk("--> %s slot %p\n", __func__
, slot
);
1387 /* Either returns 0 or nfserr_retry_uncached */
1388 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1389 if (status
== nfserr_retry_uncached_rep
)
1392 /* The sequence operation has been encoded, cstate->datap set. */
1393 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1395 resp
->opcnt
= slot
->sl_opcnt
;
1396 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1397 status
= slot
->sl_status
;
1403 * Set the exchange_id flags returned by the server.
1406 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1408 /* pNFS is not supported */
1409 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1411 /* Referrals are supported, Migration is not. */
1412 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1414 /* set the wire flags to return to client. */
1415 clid
->flags
= new->cl_exchange_flags
;
1419 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1420 struct nfsd4_compound_state
*cstate
,
1421 struct nfsd4_exchange_id
*exid
)
1423 struct nfs4_client
*unconf
, *conf
, *new;
1425 unsigned int strhashval
;
1426 char dname
[HEXDIR_LEN
];
1427 char addr_str
[INET6_ADDRSTRLEN
];
1428 nfs4_verifier verf
= exid
->verifier
;
1429 struct sockaddr
*sa
= svc_addr(rqstp
);
1431 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1432 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1433 "ip_addr=%s flags %x, spa_how %d\n",
1434 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1435 addr_str
, exid
->flags
, exid
->spa_how
);
1437 if (!check_name(exid
->clname
) || (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
))
1438 return nfserr_inval
;
1440 /* Currently only support SP4_NONE */
1441 switch (exid
->spa_how
) {
1445 return nfserr_serverfault
;
1447 BUG(); /* checked by xdr code */
1449 return nfserr_serverfault
; /* no excuse :-/ */
1452 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1457 strhashval
= clientstr_hashval(dname
);
1462 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1464 if (!clp_used_exchangeid(conf
)) {
1465 status
= nfserr_clid_inuse
; /* XXX: ? */
1468 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1469 /* 18.35.4 case 8 */
1470 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1471 status
= nfserr_not_same
;
1474 /* Client reboot: destroy old state */
1475 expire_client(conf
);
1478 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1479 /* 18.35.4 case 9 */
1480 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1481 status
= nfserr_perm
;
1484 expire_client(conf
);
1488 * Set bit when the owner id and verifier map to an already
1489 * confirmed client id (18.35.3).
1491 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1494 * Falling into 18.35.4 case 2, possible router replay.
1495 * Leave confirmed record intact and return same result.
1497 copy_verf(conf
, &verf
);
1502 /* 18.35.4 case 7 */
1503 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1504 status
= nfserr_noent
;
1508 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1511 * Possible retry or client restart. Per 18.35.4 case 4,
1512 * a new unconfirmed record should be generated regardless
1513 * of whether any properties have changed.
1515 expire_client(unconf
);
1520 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1522 status
= nfserr_jukebox
;
1527 add_to_unconfirmed(new, strhashval
);
1529 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1530 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1533 nfsd4_set_ex_flags(new, exid
);
1535 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1536 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1540 nfs4_unlock_state();
1542 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1547 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1549 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1552 /* The slot is in use, and no response has been sent. */
1554 if (seqid
== slot_seqid
)
1555 return nfserr_jukebox
;
1557 return nfserr_seq_misordered
;
1560 if (likely(seqid
== slot_seqid
+ 1))
1563 if (seqid
== slot_seqid
)
1564 return nfserr_replay_cache
;
1566 if (seqid
== 1 && (slot_seqid
+ 1) == 0)
1568 /* Misordered replay or misordered new request */
1569 return nfserr_seq_misordered
;
1573 * Cache the create session result into the create session single DRC
1574 * slot cache by saving the xdr structure. sl_seqid has been set.
1575 * Do this for solo or embedded create session operations.
1578 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1579 struct nfsd4_clid_slot
*slot
, int nfserr
)
1581 slot
->sl_status
= nfserr
;
1582 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1586 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1587 struct nfsd4_clid_slot
*slot
)
1589 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1590 return slot
->sl_status
;
1593 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1594 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1595 1 + /* MIN tag is length with zero, only length */ \
1596 3 + /* version, opcount, opcode */ \
1597 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1598 /* seqid, slotID, slotID, cache */ \
1599 4 ) * sizeof(__be32))
1601 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1602 2 + /* verifier: AUTH_NULL, length 0 */\
1604 1 + /* MIN tag is length with zero, only length */ \
1605 3 + /* opcount, opcode, opstatus*/ \
1606 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1607 /* seqid, slotID, slotID, slotID, status */ \
1608 5 ) * sizeof(__be32))
1610 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1612 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1613 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1617 nfsd4_create_session(struct svc_rqst
*rqstp
,
1618 struct nfsd4_compound_state
*cstate
,
1619 struct nfsd4_create_session
*cr_ses
)
1621 struct sockaddr
*sa
= svc_addr(rqstp
);
1622 struct nfs4_client
*conf
, *unconf
;
1623 struct nfsd4_session
*new;
1624 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1625 bool confirm_me
= false;
1628 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1629 return nfserr_inval
;
1632 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1633 conf
= find_confirmed_client(&cr_ses
->clientid
);
1636 cs_slot
= &conf
->cl_cs_slot
;
1637 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1638 if (status
== nfserr_replay_cache
) {
1639 dprintk("Got a create_session replay! seqid= %d\n",
1641 /* Return the cached reply status */
1642 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1644 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1645 status
= nfserr_seq_misordered
;
1646 dprintk("Sequence misordered!\n");
1647 dprintk("Expected seqid= %d but got seqid= %d\n",
1648 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1651 } else if (unconf
) {
1652 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1653 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1654 status
= nfserr_clid_inuse
;
1658 cs_slot
= &unconf
->cl_cs_slot
;
1659 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1661 /* an unconfirmed replay returns misordered */
1662 status
= nfserr_seq_misordered
;
1669 status
= nfserr_stale_clientid
;
1674 * XXX: we should probably set this at creation time, and check
1675 * for consistent minorversion use throughout:
1677 conf
->cl_minorversion
= 1;
1679 * We do not support RDMA or persistent sessions
1681 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1682 cr_ses
->flags
&= ~SESSION4_RDMA
;
1684 status
= nfserr_toosmall
;
1685 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1688 status
= nfserr_jukebox
;
1689 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1693 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1694 NFS4_MAX_SESSIONID_LEN
);
1695 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1696 sizeof(struct nfsd4_channel_attrs
));
1697 cs_slot
->sl_seqid
++;
1698 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1700 /* cache solo and embedded create sessions under the state lock */
1701 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1703 move_to_confirmed(conf
);
1705 nfs4_unlock_state();
1706 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1710 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1712 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1713 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1715 return argp
->opcnt
== resp
->opcnt
;
1718 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1721 case NFS4_CDFC4_FORE
:
1722 case NFS4_CDFC4_BACK
:
1724 case NFS4_CDFC4_FORE_OR_BOTH
:
1725 case NFS4_CDFC4_BACK_OR_BOTH
:
1726 *dir
= NFS4_CDFC4_BOTH
;
1729 return nfserr_inval
;
1732 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1733 struct nfsd4_compound_state
*cstate
,
1734 struct nfsd4_bind_conn_to_session
*bcts
)
1738 if (!nfsd4_last_compound_op(rqstp
))
1739 return nfserr_not_only_op
;
1740 spin_lock(&client_lock
);
1741 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1742 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1743 * client_lock iself: */
1744 if (cstate
->session
) {
1745 nfsd4_get_session(cstate
->session
);
1746 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1748 spin_unlock(&client_lock
);
1749 if (!cstate
->session
)
1750 return nfserr_badsession
;
1752 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1754 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1758 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1762 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1766 nfsd4_destroy_session(struct svc_rqst
*r
,
1767 struct nfsd4_compound_state
*cstate
,
1768 struct nfsd4_destroy_session
*sessionid
)
1770 struct nfsd4_session
*ses
;
1771 u32 status
= nfserr_badsession
;
1774 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1775 * - Should we return nfserr_back_chan_busy if waiting for
1776 * callbacks on to-be-destroyed session?
1777 * - Do we need to clear any callback info from previous session?
1780 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1781 if (!nfsd4_last_compound_op(r
))
1782 return nfserr_not_only_op
;
1784 dump_sessionid(__func__
, &sessionid
->sessionid
);
1785 spin_lock(&client_lock
);
1786 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1788 spin_unlock(&client_lock
);
1792 unhash_session(ses
);
1793 spin_unlock(&client_lock
);
1796 nfsd4_probe_callback_sync(ses
->se_client
);
1797 nfs4_unlock_state();
1799 nfsd4_del_conns(ses
);
1801 nfsd4_put_session(ses
);
1804 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1808 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1810 struct nfsd4_conn
*c
;
1812 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1813 if (c
->cn_xprt
== xpt
) {
1820 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1822 struct nfs4_client
*clp
= ses
->se_client
;
1823 struct nfsd4_conn
*c
;
1826 spin_lock(&clp
->cl_lock
);
1827 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1829 spin_unlock(&clp
->cl_lock
);
1833 __nfsd4_hash_conn(new, ses
);
1834 spin_unlock(&clp
->cl_lock
);
1835 ret
= nfsd4_register_conn(new);
1837 /* oops; xprt is already down: */
1838 nfsd4_conn_lost(&new->cn_xpt_user
);
1842 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1844 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1846 return args
->opcnt
> session
->se_fchannel
.maxops
;
1849 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1850 struct nfsd4_session
*session
)
1852 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1854 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1858 nfsd4_sequence(struct svc_rqst
*rqstp
,
1859 struct nfsd4_compound_state
*cstate
,
1860 struct nfsd4_sequence
*seq
)
1862 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1863 struct nfsd4_session
*session
;
1864 struct nfsd4_slot
*slot
;
1865 struct nfsd4_conn
*conn
;
1868 if (resp
->opcnt
!= 1)
1869 return nfserr_sequence_pos
;
1872 * Will be either used or freed by nfsd4_sequence_check_conn
1875 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1877 return nfserr_jukebox
;
1879 spin_lock(&client_lock
);
1880 status
= nfserr_badsession
;
1881 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1885 status
= nfserr_too_many_ops
;
1886 if (nfsd4_session_too_many_ops(rqstp
, session
))
1889 status
= nfserr_req_too_big
;
1890 if (nfsd4_request_too_big(rqstp
, session
))
1893 status
= nfserr_badslot
;
1894 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1897 slot
= session
->se_slots
[seq
->slotid
];
1898 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1900 /* We do not negotiate the number of slots yet, so set the
1901 * maxslots to the session maxreqs which is used to encode
1902 * sr_highest_slotid and the sr_target_slot id to maxslots */
1903 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1905 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
, slot
->sl_inuse
);
1906 if (status
== nfserr_replay_cache
) {
1907 cstate
->slot
= slot
;
1908 cstate
->session
= session
;
1909 /* Return the cached reply status and set cstate->status
1910 * for nfsd4_proc_compound processing */
1911 status
= nfsd4_replay_cache_entry(resp
, seq
);
1912 cstate
->status
= nfserr_replay_cache
;
1918 nfsd4_sequence_check_conn(conn
, session
);
1921 /* Success! bump slot seqid */
1922 slot
->sl_inuse
= true;
1923 slot
->sl_seqid
= seq
->seqid
;
1924 slot
->sl_cachethis
= seq
->cachethis
;
1926 cstate
->slot
= slot
;
1927 cstate
->session
= session
;
1930 /* Hold a session reference until done processing the compound. */
1931 if (cstate
->session
) {
1932 struct nfs4_client
*clp
= session
->se_client
;
1934 nfsd4_get_session(cstate
->session
);
1935 atomic_inc(&clp
->cl_refcount
);
1936 if (clp
->cl_cb_state
== NFSD4_CB_DOWN
)
1937 seq
->status_flags
|= SEQ4_STATUS_CB_PATH_DOWN
;
1940 spin_unlock(&client_lock
);
1941 dprintk("%s: return %d\n", __func__
, ntohl(status
));
1946 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
1950 if (rc
->rca_one_fs
) {
1951 if (!cstate
->current_fh
.fh_dentry
)
1952 return nfserr_nofilehandle
;
1954 * We don't take advantage of the rca_one_fs case.
1955 * That's OK, it's optional, we can safely ignore it.
1961 status
= nfserr_complete_already
;
1962 if (cstate
->session
->se_client
->cl_firststate
)
1965 status
= nfserr_stale_clientid
;
1966 if (is_client_expired(cstate
->session
->se_client
))
1968 * The following error isn't really legal.
1969 * But we only get here if the client just explicitly
1970 * destroyed the client. Surely it no longer cares what
1971 * error it gets back on an operation for the dead
1977 nfsd4_create_clid_dir(cstate
->session
->se_client
);
1979 nfs4_unlock_state();
1984 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
1985 struct nfsd4_setclientid
*setclid
)
1987 struct xdr_netobj clname
= {
1988 .len
= setclid
->se_namelen
,
1989 .data
= setclid
->se_name
,
1991 nfs4_verifier clverifier
= setclid
->se_verf
;
1992 unsigned int strhashval
;
1993 struct nfs4_client
*conf
, *unconf
, *new;
1995 char dname
[HEXDIR_LEN
];
1997 if (!check_name(clname
))
1998 return nfserr_inval
;
2000 status
= nfs4_make_rec_clidname(dname
, &clname
);
2005 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2006 * We get here on a DRC miss.
2009 strhashval
= clientstr_hashval(dname
);
2012 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2014 /* RFC 3530 14.2.33 CASE 0: */
2015 status
= nfserr_clid_inuse
;
2016 if (clp_used_exchangeid(conf
))
2018 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2019 char addr_str
[INET6_ADDRSTRLEN
];
2020 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2022 dprintk("NFSD: setclientid: string in use by client "
2023 "at %s\n", addr_str
);
2028 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2029 * has a description of SETCLIENTID request processing consisting
2030 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2032 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2033 status
= nfserr_jukebox
;
2036 * RFC 3530 14.2.33 CASE 4:
2037 * placed first, because it is the normal case
2040 expire_client(unconf
);
2041 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2045 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2047 * RFC 3530 14.2.33 CASE 1:
2048 * probable callback update
2051 /* Note this is removing unconfirmed {*x***},
2052 * which is stronger than RFC recommended {vxc**}.
2053 * This has the advantage that there is at most
2054 * one {*x***} in either list at any time.
2056 expire_client(unconf
);
2058 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2061 copy_clid(new, conf
);
2062 } else if (!unconf
) {
2064 * RFC 3530 14.2.33 CASE 2:
2065 * probable client reboot; state will be removed if
2068 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2074 * RFC 3530 14.2.33 CASE 3:
2075 * probable client reboot; state will be removed if
2078 expire_client(unconf
);
2079 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2085 * XXX: we should probably set this at creation time, and check
2086 * for consistent minorversion use throughout:
2088 new->cl_minorversion
= 0;
2089 gen_callback(new, setclid
, rqstp
);
2090 add_to_unconfirmed(new, strhashval
);
2091 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2092 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2093 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2096 nfs4_unlock_state();
2102 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2103 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2104 * bullets, labeled as CASE1 - CASE4 below.
2107 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2108 struct nfsd4_compound_state
*cstate
,
2109 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2111 struct sockaddr
*sa
= svc_addr(rqstp
);
2112 struct nfs4_client
*conf
, *unconf
;
2113 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2114 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2117 if (STALE_CLIENTID(clid
))
2118 return nfserr_stale_clientid
;
2120 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2121 * We get here on a DRC miss.
2126 conf
= find_confirmed_client(clid
);
2127 unconf
= find_unconfirmed_client(clid
);
2129 status
= nfserr_clid_inuse
;
2130 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2132 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2136 * section 14.2.34 of RFC 3530 has a description of
2137 * SETCLIENTID_CONFIRM request processing consisting
2138 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2140 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2142 * RFC 3530 14.2.34 CASE 1:
2145 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2146 status
= nfserr_clid_inuse
;
2148 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2149 nfsd4_probe_callback(conf
);
2150 expire_client(unconf
);
2154 } else if (conf
&& !unconf
) {
2156 * RFC 3530 14.2.34 CASE 2:
2157 * probable retransmitted request; play it safe and
2160 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2161 status
= nfserr_clid_inuse
;
2164 } else if (!conf
&& unconf
2165 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2167 * RFC 3530 14.2.34 CASE 3:
2168 * Normal case; new or rebooted client:
2170 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2171 status
= nfserr_clid_inuse
;
2174 clientstr_hashval(unconf
->cl_recdir
);
2175 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2178 nfsd4_remove_clid_dir(conf
);
2179 expire_client(conf
);
2181 move_to_confirmed(unconf
);
2183 nfsd4_probe_callback(conf
);
2186 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2187 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2190 * RFC 3530 14.2.34 CASE 4:
2191 * Client probably hasn't noticed that we rebooted yet.
2193 status
= nfserr_stale_clientid
;
2195 /* check that we have hit one of the cases...*/
2196 status
= nfserr_clid_inuse
;
2199 nfs4_unlock_state();
2203 /* OPEN Share state helper functions */
2204 static inline struct nfs4_file
*
2205 alloc_init_file(struct inode
*ino
)
2207 struct nfs4_file
*fp
;
2208 unsigned int hashval
= file_hashval(ino
);
2210 fp
= kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2212 atomic_set(&fp
->fi_ref
, 1);
2213 INIT_LIST_HEAD(&fp
->fi_hash
);
2214 INIT_LIST_HEAD(&fp
->fi_stateids
);
2215 INIT_LIST_HEAD(&fp
->fi_delegations
);
2216 fp
->fi_inode
= igrab(ino
);
2217 fp
->fi_id
= current_fileid
++;
2218 fp
->fi_had_conflict
= false;
2219 fp
->fi_lease
= NULL
;
2220 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2221 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2222 spin_lock(&recall_lock
);
2223 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2224 spin_unlock(&recall_lock
);
2231 nfsd4_free_slab(struct kmem_cache
**slab
)
2235 kmem_cache_destroy(*slab
);
2240 nfsd4_free_slabs(void)
2242 nfsd4_free_slab(&openowner_slab
);
2243 nfsd4_free_slab(&lockowner_slab
);
2244 nfsd4_free_slab(&file_slab
);
2245 nfsd4_free_slab(&stateid_slab
);
2246 nfsd4_free_slab(&deleg_slab
);
2250 nfsd4_init_slabs(void)
2252 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2253 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2254 if (openowner_slab
== NULL
)
2256 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2257 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2258 if (lockowner_slab
== NULL
)
2260 file_slab
= kmem_cache_create("nfsd4_files",
2261 sizeof(struct nfs4_file
), 0, 0, NULL
);
2262 if (file_slab
== NULL
)
2264 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2265 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2266 if (stateid_slab
== NULL
)
2268 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2269 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2270 if (deleg_slab
== NULL
)
2275 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2279 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2281 kfree(oo
->oo_owner
.so_owner
.data
);
2282 kmem_cache_free(openowner_slab
, oo
);
2285 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2287 kfree(lo
->lo_owner
.so_owner
.data
);
2288 kmem_cache_free(lockowner_slab
, lo
);
2291 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2293 rp
->rp_status
= nfserr_serverfault
;
2295 rp
->rp_buf
= rp
->rp_ibuf
;
2298 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2300 struct nfs4_stateowner
*sop
;
2302 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2306 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2307 if (!sop
->so_owner
.data
) {
2308 kmem_cache_free(slab
, sop
);
2311 sop
->so_owner
.len
= owner
->len
;
2313 INIT_LIST_HEAD(&sop
->so_stateids
);
2314 sop
->so_id
= current_ownerid
++;
2315 sop
->so_client
= clp
;
2316 init_nfs4_replay(&sop
->so_replay
);
2320 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2322 unsigned int idhashval
;
2324 idhashval
= open_ownerid_hashval(oo
->oo_owner
.so_id
);
2325 list_add(&oo
->oo_owner
.so_idhash
, &open_ownerid_hashtbl
[idhashval
]);
2326 list_add(&oo
->oo_owner
.so_strhash
, &open_ownerstr_hashtbl
[strhashval
]);
2327 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2330 static struct nfs4_openowner
*
2331 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2332 struct nfs4_openowner
*oo
;
2334 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2337 oo
->oo_owner
.so_is_open_owner
= 1;
2338 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2339 oo
->oo_confirmed
= 0;
2341 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2342 hash_openowner(oo
, clp
, strhashval
);
2347 init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2348 struct nfs4_openowner
*oo
= open
->op_openowner
;
2350 INIT_LIST_HEAD(&stp
->st_lockowners
);
2351 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2352 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2353 stp
->st_stid
.sc_type
= NFS4_OPEN_STID
;
2354 stp
->st_stateowner
= &oo
->oo_owner
;
2357 stp
->st_stid
.sc_stateid
.si_boot
= boot_time
;
2358 stp
->st_stid
.sc_stateid
.si_stateownerid
= oo
->oo_owner
.so_id
;
2359 stp
->st_stid
.sc_stateid
.si_fileid
= fp
->fi_id
;
2360 /* note will be incremented before first return to client: */
2361 stp
->st_stid
.sc_stateid
.si_generation
= 0;
2362 hash_stid(&stp
->st_stid
);
2363 stp
->st_access_bmap
= 0;
2364 stp
->st_deny_bmap
= 0;
2365 __set_bit(open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
,
2366 &stp
->st_access_bmap
);
2367 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2368 stp
->st_openstp
= NULL
;
2372 move_to_close_lru(struct nfs4_openowner
*oo
)
2374 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2376 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2377 oo
->oo_time
= get_seconds();
2381 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2384 return (sop
->so_owner
.len
== owner
->len
) &&
2385 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2386 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2389 static struct nfs4_openowner
*
2390 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2392 struct nfs4_stateowner
*so
= NULL
;
2394 list_for_each_entry(so
, &open_ownerstr_hashtbl
[hashval
], so_strhash
) {
2395 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
))
2396 return container_of(so
, struct nfs4_openowner
, oo_owner
);
2401 /* search file_hashtbl[] for file */
2402 static struct nfs4_file
*
2403 find_file(struct inode
*ino
)
2405 unsigned int hashval
= file_hashval(ino
);
2406 struct nfs4_file
*fp
;
2408 spin_lock(&recall_lock
);
2409 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2410 if (fp
->fi_inode
== ino
) {
2412 spin_unlock(&recall_lock
);
2416 spin_unlock(&recall_lock
);
2420 static inline int access_valid(u32 x
, u32 minorversion
)
2422 if ((x
& NFS4_SHARE_ACCESS_MASK
) < NFS4_SHARE_ACCESS_READ
)
2424 if ((x
& NFS4_SHARE_ACCESS_MASK
) > NFS4_SHARE_ACCESS_BOTH
)
2426 x
&= ~NFS4_SHARE_ACCESS_MASK
;
2427 if (minorversion
&& x
) {
2428 if ((x
& NFS4_SHARE_WANT_MASK
) > NFS4_SHARE_WANT_CANCEL
)
2430 if ((x
& NFS4_SHARE_WHEN_MASK
) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
)
2432 x
&= ~(NFS4_SHARE_WANT_MASK
| NFS4_SHARE_WHEN_MASK
);
2439 static inline int deny_valid(u32 x
)
2441 /* Note: unlike access bits, deny bits may be zero. */
2442 return x
<= NFS4_SHARE_DENY_BOTH
;
2446 * Called to check deny when READ with all zero stateid or
2447 * WRITE with all zero or all one stateid
2450 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2452 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2453 struct nfs4_file
*fp
;
2454 struct nfs4_ol_stateid
*stp
;
2457 dprintk("NFSD: nfs4_share_conflict\n");
2459 fp
= find_file(ino
);
2462 ret
= nfserr_locked
;
2463 /* Search for conflicting share reservations */
2464 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2465 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2466 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2475 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2477 /* We're assuming the state code never drops its reference
2478 * without first removing the lease. Since we're in this lease
2479 * callback (and since the lease code is serialized by the kernel
2480 * lock) we know the server hasn't removed the lease yet, we know
2481 * it's safe to take a reference: */
2482 atomic_inc(&dp
->dl_count
);
2484 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2486 /* only place dl_time is set. protected by lock_flocks*/
2487 dp
->dl_time
= get_seconds();
2489 nfsd4_cb_recall(dp
);
2492 /* Called from break_lease() with lock_flocks() held. */
2493 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2495 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2496 struct nfs4_delegation
*dp
;
2499 /* We assume break_lease is only called once per lease: */
2500 BUG_ON(fp
->fi_had_conflict
);
2502 * We don't want the locks code to timeout the lease for us;
2503 * we'll remove it ourself if a delegation isn't returned
2506 fl
->fl_break_time
= 0;
2508 spin_lock(&recall_lock
);
2509 fp
->fi_had_conflict
= true;
2510 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2511 nfsd_break_one_deleg(dp
);
2512 spin_unlock(&recall_lock
);
2516 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2519 return lease_modify(onlist
, arg
);
2524 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2525 .lm_break
= nfsd_break_deleg_cb
,
2526 .lm_change
= nfsd_change_deleg_cb
,
2529 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2531 if (nfsd4_has_session(cstate
))
2533 if (seqid
== so
->so_seqid
- 1)
2534 return nfserr_replay_me
;
2535 if (seqid
== so
->so_seqid
)
2537 return nfserr_bad_seqid
;
2541 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2542 struct nfsd4_open
*open
)
2544 clientid_t
*clientid
= &open
->op_clientid
;
2545 struct nfs4_client
*clp
= NULL
;
2546 unsigned int strhashval
;
2547 struct nfs4_openowner
*oo
= NULL
;
2550 if (!check_name(open
->op_owner
))
2551 return nfserr_inval
;
2553 if (STALE_CLIENTID(&open
->op_clientid
))
2554 return nfserr_stale_clientid
;
2556 strhashval
= open_ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2557 oo
= find_openstateowner_str(strhashval
, open
);
2558 open
->op_openowner
= oo
;
2560 /* Make sure the client's lease hasn't expired. */
2561 clp
= find_confirmed_client(clientid
);
2563 return nfserr_expired
;
2566 if (!oo
->oo_confirmed
) {
2567 /* Replace unconfirmed owners without checking for replay. */
2568 clp
= oo
->oo_owner
.so_client
;
2569 release_openowner(oo
);
2570 open
->op_openowner
= NULL
;
2573 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2577 if (open
->op_openowner
== NULL
) {
2578 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2580 return nfserr_jukebox
;
2581 open
->op_openowner
= oo
;
2583 list_del_init(&oo
->oo_close_lru
);
2584 renew_client(oo
->oo_owner
.so_client
);
2588 static inline __be32
2589 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2591 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2592 return nfserr_openmode
;
2597 static int share_access_to_flags(u32 share_access
)
2599 share_access
&= ~NFS4_SHARE_WANT_MASK
;
2601 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2604 static struct nfs4_delegation
*find_deleg_stateid(stateid_t
*s
)
2606 struct nfs4_stid
*ret
;
2608 ret
= find_stateid_by_type(s
, NFS4_DELEG_STID
);
2611 return delegstateid(ret
);
2615 nfs4_check_deleg(struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2616 struct nfs4_delegation
**dp
)
2619 __be32 status
= nfserr_bad_stateid
;
2621 *dp
= find_deleg_stateid(&open
->op_delegate_stateid
);
2624 flags
= share_access_to_flags(open
->op_share_access
);
2625 status
= nfs4_check_delegmode(*dp
, flags
);
2629 if (open
->op_claim_type
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2633 open
->op_openowner
->oo_confirmed
= 1;
2638 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2640 struct nfs4_ol_stateid
*local
;
2641 struct nfs4_openowner
*oo
= open
->op_openowner
;
2643 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2644 /* ignore lock owners */
2645 if (local
->st_stateowner
->so_is_open_owner
== 0)
2647 /* remember if we have seen this open owner */
2648 if (local
->st_stateowner
== &oo
->oo_owner
)
2650 /* check for conflicting share reservations */
2651 if (!test_share(local
, open
))
2652 return nfserr_share_denied
;
2657 static inline struct nfs4_ol_stateid
*
2658 nfs4_alloc_stateid(void)
2660 return kmem_cache_alloc(stateid_slab
, GFP_KERNEL
);
2663 static inline int nfs4_access_to_access(u32 nfs4_access
)
2667 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2668 flags
|= NFSD_MAY_READ
;
2669 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2670 flags
|= NFSD_MAY_WRITE
;
2674 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2675 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2678 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2679 int access
= nfs4_access_to_access(open
->op_share_access
);
2681 /* CLAIM_DELEGATE_CUR is used in response to a broken lease;
2682 * allowing it to break the lease and return EAGAIN leaves the
2683 * client unable to make progress in returning the delegation */
2684 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2685 access
|= NFSD_MAY_NOT_BREAK_LEASE
;
2687 if (!fp
->fi_fds
[oflag
]) {
2688 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2689 &fp
->fi_fds
[oflag
]);
2693 nfs4_file_get_access(fp
, oflag
);
2699 nfs4_new_open(struct svc_rqst
*rqstp
, struct nfs4_ol_stateid
**stpp
,
2700 struct nfs4_file
*fp
, struct svc_fh
*cur_fh
,
2701 struct nfsd4_open
*open
)
2703 struct nfs4_ol_stateid
*stp
;
2706 stp
= nfs4_alloc_stateid();
2708 return nfserr_jukebox
;
2710 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2712 kmem_cache_free(stateid_slab
, stp
);
2719 static inline __be32
2720 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2721 struct nfsd4_open
*open
)
2723 struct iattr iattr
= {
2724 .ia_valid
= ATTR_SIZE
,
2727 if (!open
->op_truncate
)
2729 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2730 return nfserr_inval
;
2731 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2735 nfs4_upgrade_open(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
, struct svc_fh
*cur_fh
, struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
)
2737 u32 op_share_access
= open
->op_share_access
& ~NFS4_SHARE_WANT_MASK
;
2741 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2743 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2747 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2750 int oflag
= nfs4_access_to_omode(op_share_access
);
2751 nfs4_file_put_access(fp
, oflag
);
2755 /* remember the open */
2756 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2757 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2764 nfs4_set_claim_prev(struct nfsd4_open
*open
)
2766 open
->op_openowner
->oo_confirmed
= 1;
2767 open
->op_openowner
->oo_owner
.so_client
->cl_firststate
= 1;
2770 /* Should we give out recallable state?: */
2771 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2773 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2776 * In the sessions case, since we don't have to establish a
2777 * separate connection for callbacks, we assume it's OK
2778 * until we hear otherwise:
2780 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2783 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2785 struct file_lock
*fl
;
2787 fl
= locks_alloc_lock();
2790 locks_init_lock(fl
);
2791 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2792 fl
->fl_flags
= FL_LEASE
;
2793 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2794 fl
->fl_end
= OFFSET_MAX
;
2795 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2796 fl
->fl_pid
= current
->tgid
;
2800 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2802 struct nfs4_file
*fp
= dp
->dl_file
;
2803 struct file_lock
*fl
;
2806 fl
= nfs4_alloc_init_lease(dp
, flag
);
2809 fl
->fl_file
= find_readable_file(fp
);
2810 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2811 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2813 list_del_init(&dp
->dl_perclnt
);
2814 locks_free_lock(fl
);
2818 fp
->fi_deleg_file
= fl
->fl_file
;
2819 get_file(fp
->fi_deleg_file
);
2820 atomic_set(&fp
->fi_delegees
, 1);
2821 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2825 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2827 struct nfs4_file
*fp
= dp
->dl_file
;
2830 return nfs4_setlease(dp
, flag
);
2831 spin_lock(&recall_lock
);
2832 if (fp
->fi_had_conflict
) {
2833 spin_unlock(&recall_lock
);
2836 atomic_inc(&fp
->fi_delegees
);
2837 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2838 spin_unlock(&recall_lock
);
2839 list_add(&dp
->dl_perclnt
, &dp
->dl_client
->cl_delegations
);
2844 * Attempt to hand out a delegation.
2847 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2849 struct nfs4_delegation
*dp
;
2850 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2852 int status
, flag
= 0;
2854 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2855 flag
= NFS4_OPEN_DELEGATE_NONE
;
2856 open
->op_recall
= 0;
2857 switch (open
->op_claim_type
) {
2858 case NFS4_OPEN_CLAIM_PREVIOUS
:
2860 open
->op_recall
= 1;
2861 flag
= open
->op_delegate_type
;
2862 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2865 case NFS4_OPEN_CLAIM_NULL
:
2866 /* Let's not give out any delegations till everyone's
2867 * had the chance to reclaim theirs.... */
2868 if (locks_in_grace())
2870 if (!cb_up
|| !oo
->oo_confirmed
)
2872 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2873 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2875 flag
= NFS4_OPEN_DELEGATE_READ
;
2881 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2884 status
= nfs4_set_delegation(dp
, flag
);
2888 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2890 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2891 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2893 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
2894 && flag
== NFS4_OPEN_DELEGATE_NONE
2895 && open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2896 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2897 open
->op_delegate_type
= flag
;
2900 nfs4_put_delegation(dp
);
2902 flag
= NFS4_OPEN_DELEGATE_NONE
;
2907 * called with nfs4_lock_state() held.
2910 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2912 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2913 struct nfs4_file
*fp
= NULL
;
2914 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2915 struct nfs4_ol_stateid
*stp
= NULL
;
2916 struct nfs4_delegation
*dp
= NULL
;
2919 status
= nfserr_inval
;
2920 if (!access_valid(open
->op_share_access
, resp
->cstate
.minorversion
)
2921 || !deny_valid(open
->op_share_deny
))
2924 * Lookup file; if found, lookup stateid and check open request,
2925 * and check for delegations in the process of being recalled.
2926 * If not found, create the nfs4_file struct
2928 fp
= find_file(ino
);
2930 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
2932 status
= nfs4_check_deleg(fp
, open
, &dp
);
2936 status
= nfserr_bad_stateid
;
2937 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
)
2939 status
= nfserr_jukebox
;
2940 fp
= alloc_init_file(ino
);
2946 * OPEN the file, or upgrade an existing OPEN.
2947 * If truncate fails, the OPEN fails.
2950 /* Stateid was found, this is an OPEN upgrade */
2951 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
2955 status
= nfs4_new_open(rqstp
, &stp
, fp
, current_fh
, open
);
2958 init_open_stateid(stp
, fp
, open
);
2959 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
2961 release_open_stateid(stp
);
2965 update_stateid(&stp
->st_stid
.sc_stateid
);
2966 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
2968 if (nfsd4_has_session(&resp
->cstate
))
2969 open
->op_openowner
->oo_confirmed
= 1;
2972 * Attempt to hand out a delegation. No error return, because the
2973 * OPEN succeeds even if we fail.
2975 nfs4_open_delegation(current_fh
, open
, stp
);
2979 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
2980 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
2984 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
2985 nfs4_set_claim_prev(open
);
2987 * To finish the open response, we just need to set the rflags.
2989 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
2990 if (!open
->op_openowner
->oo_confirmed
&&
2991 !nfsd4_has_session(&resp
->cstate
))
2992 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
2998 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3001 struct nfs4_client
*clp
;
3005 dprintk("process_renew(%08x/%08x): starting\n",
3006 clid
->cl_boot
, clid
->cl_id
);
3007 status
= nfserr_stale_clientid
;
3008 if (STALE_CLIENTID(clid
))
3010 clp
= find_confirmed_client(clid
);
3011 status
= nfserr_expired
;
3013 /* We assume the client took too long to RENEW. */
3014 dprintk("nfsd4_renew: clientid not found!\n");
3018 status
= nfserr_cb_path_down
;
3019 if (!list_empty(&clp
->cl_delegations
)
3020 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3024 nfs4_unlock_state();
3028 static struct lock_manager nfsd4_manager
= {
3032 nfsd4_end_grace(void)
3034 dprintk("NFSD: end of grace period\n");
3035 nfsd4_recdir_purge_old();
3036 locks_end_grace(&nfsd4_manager
);
3038 * Now that every NFSv4 client has had the chance to recover and
3039 * to see the (possibly new, possibly shorter) lease time, we
3040 * can safely set the next grace time to the current lease time:
3042 nfsd4_grace
= nfsd4_lease
;
3046 nfs4_laundromat(void)
3048 struct nfs4_client
*clp
;
3049 struct nfs4_openowner
*oo
;
3050 struct nfs4_delegation
*dp
;
3051 struct list_head
*pos
, *next
, reaplist
;
3052 time_t cutoff
= get_seconds() - nfsd4_lease
;
3053 time_t t
, clientid_val
= nfsd4_lease
;
3054 time_t u
, test_val
= nfsd4_lease
;
3058 dprintk("NFSD: laundromat service - starting\n");
3059 if (locks_in_grace())
3061 INIT_LIST_HEAD(&reaplist
);
3062 spin_lock(&client_lock
);
3063 list_for_each_safe(pos
, next
, &client_lru
) {
3064 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3065 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3066 t
= clp
->cl_time
- cutoff
;
3067 if (clientid_val
> t
)
3071 if (atomic_read(&clp
->cl_refcount
)) {
3072 dprintk("NFSD: client in use (clientid %08x)\n",
3073 clp
->cl_clientid
.cl_id
);
3076 unhash_client_locked(clp
);
3077 list_add(&clp
->cl_lru
, &reaplist
);
3079 spin_unlock(&client_lock
);
3080 list_for_each_safe(pos
, next
, &reaplist
) {
3081 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3082 dprintk("NFSD: purging unused client (clientid %08x)\n",
3083 clp
->cl_clientid
.cl_id
);
3084 nfsd4_remove_clid_dir(clp
);
3087 spin_lock(&recall_lock
);
3088 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3089 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3090 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3091 u
= dp
->dl_time
- cutoff
;
3096 list_move(&dp
->dl_recall_lru
, &reaplist
);
3098 spin_unlock(&recall_lock
);
3099 list_for_each_safe(pos
, next
, &reaplist
) {
3100 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3101 list_del_init(&dp
->dl_recall_lru
);
3102 unhash_delegation(dp
);
3104 test_val
= nfsd4_lease
;
3105 list_for_each_safe(pos
, next
, &close_lru
) {
3106 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3107 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3108 u
= oo
->oo_time
- cutoff
;
3113 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
3114 oo
->oo_owner
.so_id
);
3115 release_openowner(oo
);
3117 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3118 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3119 nfs4_unlock_state();
3120 return clientid_val
;
3123 static struct workqueue_struct
*laundry_wq
;
3124 static void laundromat_main(struct work_struct
*);
3125 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3128 laundromat_main(struct work_struct
*not_used
)
3132 t
= nfs4_laundromat();
3133 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3134 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3137 static struct nfs4_openowner
* search_close_lru(u32 st_id
)
3139 struct nfs4_openowner
*local
;
3141 list_for_each_entry(local
, &close_lru
, oo_close_lru
) {
3142 if (local
->oo_owner
.so_id
== st_id
)
3149 nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3151 return fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
;
3155 STALE_STATEID(stateid_t
*stateid
)
3157 if (stateid
->si_boot
== boot_time
)
3159 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3160 STATEID_VAL(stateid
));
3165 access_permit_read(unsigned long access_bmap
)
3167 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3168 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3169 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3173 access_permit_write(unsigned long access_bmap
)
3175 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3176 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3180 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3182 __be32 status
= nfserr_openmode
;
3184 /* For lock stateid's, we test the parent open, not the lock: */
3185 if (stp
->st_openstp
)
3186 stp
= stp
->st_openstp
;
3187 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3189 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3196 static inline __be32
3197 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3199 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3201 else if (locks_in_grace()) {
3202 /* Answer in remaining cases depends on existence of
3203 * conflicting state; so we must wait out the grace period. */
3204 return nfserr_grace
;
3205 } else if (flags
& WR_STATE
)
3206 return nfs4_share_conflict(current_fh
,
3207 NFS4_SHARE_DENY_WRITE
);
3208 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3209 return nfs4_share_conflict(current_fh
,
3210 NFS4_SHARE_DENY_READ
);
3214 * Allow READ/WRITE during grace period on recovered state only for files
3215 * that are not able to provide mandatory locking.
3218 grace_disallows_io(struct inode
*inode
)
3220 return locks_in_grace() && mandatory_lock(inode
);
3223 /* Returns true iff a is later than b: */
3224 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3226 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3229 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3232 * When sessions are used the stateid generation number is ignored
3235 if (has_session
&& in
->si_generation
== 0)
3238 if (in
->si_generation
== ref
->si_generation
)
3241 /* If the client sends us a stateid from the future, it's buggy: */
3242 if (stateid_generation_after(in
, ref
))
3243 return nfserr_bad_stateid
;
3245 * However, we could see a stateid from the past, even from a
3246 * non-buggy client. For example, if the client sends a lock
3247 * while some IO is outstanding, the lock may bump si_generation
3248 * while the IO is still in flight. The client could avoid that
3249 * situation by waiting for responses on all the IO requests,
3250 * but better performance may result in retrying IO that
3251 * receives an old_stateid error if requests are rarely
3252 * reordered in flight:
3254 return nfserr_old_stateid
;
3257 static int is_delegation_stateid(stateid_t
*stateid
)
3259 return stateid
->si_fileid
== 0;
3262 __be32
nfs4_validate_stateid(stateid_t
*stateid
, bool has_session
)
3264 struct nfs4_stid
*s
;
3265 struct nfs4_ol_stateid
*ols
;
3268 if (STALE_STATEID(stateid
))
3269 return nfserr_stale_stateid
;
3271 s
= find_stateid(stateid
);
3273 return nfserr_stale_stateid
;
3274 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, has_session
);
3277 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3279 ols
= openlockstateid(s
);
3280 if (ols
->st_stateowner
->so_is_open_owner
3281 && !openowner(ols
->st_stateowner
)->oo_confirmed
)
3282 return nfserr_bad_stateid
;
3287 * Checks for stateid operations
3290 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3291 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3293 struct nfs4_stid
*s
;
3294 struct nfs4_ol_stateid
*stp
= NULL
;
3295 struct nfs4_delegation
*dp
= NULL
;
3296 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3297 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3303 if (grace_disallows_io(ino
))
3304 return nfserr_grace
;
3306 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3307 return check_special_stateids(current_fh
, stateid
, flags
);
3309 status
= nfserr_stale_stateid
;
3310 if (STALE_STATEID(stateid
))
3314 * We assume that any stateid that has the current boot time,
3315 * but that we can't find, is expired:
3317 status
= nfserr_expired
;
3318 s
= find_stateid(stateid
);
3321 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3324 if (s
->sc_type
== NFS4_DELEG_STID
) {
3325 dp
= delegstateid(s
);
3326 status
= nfs4_check_delegmode(dp
, flags
);
3329 renew_client(dp
->dl_client
);
3331 *filpp
= dp
->dl_file
->fi_deleg_file
;
3334 } else { /* open or lock stateid */
3335 stp
= openlockstateid(s
);
3336 status
= nfserr_bad_stateid
;
3337 if (nfs4_check_fh(current_fh
, stp
))
3339 if (stp
->st_stateowner
->so_is_open_owner
3340 && !openowner(stp
->st_stateowner
)->oo_confirmed
)
3342 status
= nfs4_check_openmode(stp
, flags
);
3345 renew_client(stp
->st_stateowner
->so_client
);
3347 if (flags
& RD_STATE
)
3348 *filpp
= find_readable_file(stp
->st_file
);
3350 *filpp
= find_writeable_file(stp
->st_file
);
3359 nfsd4_free_delegation_stateid(stateid_t
*stateid
)
3361 struct nfs4_delegation
*dp
= find_deleg_stateid(stateid
);
3363 return nfserr_locks_held
;
3365 return nfserr_bad_stateid
;
3369 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3371 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3372 return nfserr_locks_held
;
3373 release_lock_stateid(stp
);
3378 * Test if the stateid is valid
3381 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3382 struct nfsd4_test_stateid
*test_stateid
)
3384 test_stateid
->ts_has_session
= nfsd4_has_session(cstate
);
3392 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3393 struct nfsd4_free_stateid
*free_stateid
)
3395 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3396 struct nfs4_ol_stateid
*stp
;
3400 if (is_delegation_stateid(stateid
)) {
3401 ret
= nfsd4_free_delegation_stateid(stateid
);
3405 stp
= find_ol_stateid(stateid
);
3407 ret
= nfserr_bad_stateid
;
3410 ret
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, 1);
3414 if (stp
->st_stid
.sc_type
== NFS4_OPEN_STID
) {
3415 ret
= nfserr_locks_held
;
3418 ret
= nfsd4_free_lock_stateid(stp
);
3423 nfs4_unlock_state();
3430 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3431 RD_STATE
: WR_STATE
;
3434 static __be32
nfs4_nospecial_stateid_checks(stateid_t
*stateid
)
3436 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3437 return nfserr_bad_stateid
;
3438 if (STALE_STATEID(stateid
))
3439 return nfserr_stale_stateid
;
3443 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3445 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3446 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3449 if (nfs4_check_fh(current_fh
, stp
))
3450 return nfserr_bad_stateid
;
3451 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3454 return check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3458 * Checks for sequence id mutating operations.
3461 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3462 stateid_t
*stateid
, char typemask
,
3463 struct nfs4_ol_stateid
**stpp
)
3467 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3468 seqid
, STATEID_VAL(stateid
));
3471 status
= nfs4_nospecial_stateid_checks(stateid
);
3474 *stpp
= find_ol_stateid_by_type(stateid
, typemask
);
3476 return nfserr_expired
;
3477 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3478 renew_client((*stpp
)->st_stateowner
->so_client
);
3480 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3483 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3486 struct nfs4_openowner
*oo
;
3488 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3489 NFS4_OPEN_STID
, stpp
);
3492 oo
= openowner((*stpp
)->st_stateowner
);
3493 if (!oo
->oo_confirmed
)
3494 return nfserr_bad_stateid
;
3499 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3500 struct nfsd4_open_confirm
*oc
)
3503 struct nfs4_openowner
*oo
;
3504 struct nfs4_ol_stateid
*stp
;
3506 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3507 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3508 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3510 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3516 status
= nfs4_preprocess_seqid_op(cstate
,
3517 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3518 NFS4_OPEN_STID
, &stp
);
3521 oo
= openowner(stp
->st_stateowner
);
3522 status
= nfserr_bad_stateid
;
3523 if (oo
->oo_confirmed
)
3525 oo
->oo_confirmed
= 1;
3526 update_stateid(&stp
->st_stid
.sc_stateid
);
3527 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3528 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3529 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3531 nfsd4_create_clid_dir(oo
->oo_owner
.so_client
);
3534 if (!cstate
->replay_owner
)
3535 nfs4_unlock_state();
3539 static inline void nfs4_file_downgrade(struct nfs4_ol_stateid
*stp
, unsigned int to_access
)
3543 for (i
= 1; i
< 4; i
++) {
3544 if (test_bit(i
, &stp
->st_access_bmap
) && !(i
& to_access
)) {
3545 nfs4_file_put_access(stp
->st_file
, i
);
3546 __clear_bit(i
, &stp
->st_access_bmap
);
3552 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3555 for (i
= 0; i
< 4; i
++) {
3556 if ((i
& deny
) != i
)
3557 __clear_bit(i
, bmap
);
3562 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3563 struct nfsd4_compound_state
*cstate
,
3564 struct nfsd4_open_downgrade
*od
)
3567 struct nfs4_ol_stateid
*stp
;
3569 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3570 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3571 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3573 if (!access_valid(od
->od_share_access
, cstate
->minorversion
)
3574 || !deny_valid(od
->od_share_deny
))
3575 return nfserr_inval
;
3578 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3579 &od
->od_stateid
, &stp
);
3582 status
= nfserr_inval
;
3583 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3584 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3585 stp
->st_access_bmap
, od
->od_share_access
);
3588 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3589 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3590 stp
->st_deny_bmap
, od
->od_share_deny
);
3593 nfs4_file_downgrade(stp
, od
->od_share_access
);
3595 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3597 update_stateid(&stp
->st_stid
.sc_stateid
);
3598 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3601 if (!cstate
->replay_owner
)
3602 nfs4_unlock_state();
3607 * nfs4_unlock_state() called after encode
3610 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3611 struct nfsd4_close
*close
)
3614 struct nfs4_openowner
*oo
;
3615 struct nfs4_ol_stateid
*stp
;
3617 dprintk("NFSD: nfsd4_close on file %.*s\n",
3618 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3619 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3622 /* check close_lru for replay */
3623 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, close
->cl_seqid
,
3624 &close
->cl_stateid
, &stp
);
3625 if (stp
== NULL
&& status
== nfserr_expired
) {
3627 * Also, we should make sure this isn't just the result of
3630 oo
= search_close_lru(close
->cl_stateid
.si_stateownerid
);
3631 /* It's not stale; let's assume it's expired: */
3634 cstate
->replay_owner
= &oo
->oo_owner
;
3635 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, close
->cl_seqid
);
3638 status
= nfserr_bad_seqid
;
3642 oo
= openowner(stp
->st_stateowner
);
3644 update_stateid(&stp
->st_stid
.sc_stateid
);
3645 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3647 /* release_stateid() calls nfsd_close() if needed */
3648 release_open_stateid(stp
);
3650 /* place unused nfs4_stateowners on so_close_lru list to be
3651 * released by the laundromat service after the lease period
3652 * to enable us to handle CLOSE replay
3654 if (list_empty(&oo
->oo_owner
.so_stateids
))
3655 move_to_close_lru(oo
);
3657 if (!cstate
->replay_owner
)
3658 nfs4_unlock_state();
3663 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3664 struct nfsd4_delegreturn
*dr
)
3666 struct nfs4_delegation
*dp
;
3667 stateid_t
*stateid
= &dr
->dr_stateid
;
3668 struct inode
*inode
;
3671 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3673 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3676 status
= nfserr_bad_stateid
;
3677 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3679 status
= nfserr_stale_stateid
;
3680 if (STALE_STATEID(stateid
))
3682 status
= nfserr_bad_stateid
;
3683 if (!is_delegation_stateid(stateid
))
3685 status
= nfserr_expired
;
3686 dp
= find_deleg_stateid(stateid
);
3689 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3692 renew_client(dp
->dl_client
);
3694 unhash_delegation(dp
);
3696 nfs4_unlock_state();
3703 * Lock owner state (byte-range locks)
3705 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3706 #define LOCK_HASH_BITS 8
3707 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
3708 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
3711 end_offset(u64 start
, u64 len
)
3716 return end
>= start
? end
: NFS4_MAX_UINT64
;
3719 /* last octet in a range */
3721 last_byte_offset(u64 start
, u64 len
)
3727 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3730 static unsigned int lockownerid_hashval(u32 id
)
3732 return id
& LOCK_HASH_MASK
;
3735 static inline unsigned int
3736 lock_ownerstr_hashval(struct inode
*inode
, u32 cl_id
,
3737 struct xdr_netobj
*ownername
)
3739 return (file_hashval(inode
) + cl_id
3740 + opaque_hashval(ownername
->data
, ownername
->len
))
3744 static struct list_head lock_ownerid_hashtbl
[LOCK_HASH_SIZE
];
3745 static struct list_head lock_ownerstr_hashtbl
[LOCK_HASH_SIZE
];
3748 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3749 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3750 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3751 * locking, this prevents us from being completely protocol-compliant. The
3752 * real solution to this problem is to start using unsigned file offsets in
3753 * the VFS, but this is a very deep change!
3756 nfs4_transform_lock_offset(struct file_lock
*lock
)
3758 if (lock
->fl_start
< 0)
3759 lock
->fl_start
= OFFSET_MAX
;
3760 if (lock
->fl_end
< 0)
3761 lock
->fl_end
= OFFSET_MAX
;
3764 /* Hack!: For now, we're defining this just so we can use a pointer to it
3765 * as a unique cookie to identify our (NFSv4's) posix locks. */
3766 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3770 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3772 struct nfs4_lockowner
*lo
;
3774 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3775 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3776 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3777 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3778 if (!deny
->ld_owner
.data
)
3779 /* We just don't care that much */
3781 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3782 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3785 deny
->ld_owner
.len
= 0;
3786 deny
->ld_owner
.data
= NULL
;
3787 deny
->ld_clientid
.cl_boot
= 0;
3788 deny
->ld_clientid
.cl_id
= 0;
3790 deny
->ld_start
= fl
->fl_start
;
3791 deny
->ld_length
= NFS4_MAX_UINT64
;
3792 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3793 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3794 deny
->ld_type
= NFS4_READ_LT
;
3795 if (fl
->fl_type
!= F_RDLCK
)
3796 deny
->ld_type
= NFS4_WRITE_LT
;
3799 static struct nfs4_lockowner
*
3800 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3801 struct xdr_netobj
*owner
)
3803 unsigned int hashval
= lock_ownerstr_hashval(inode
, clid
->cl_id
, owner
);
3804 struct nfs4_stateowner
*op
;
3806 list_for_each_entry(op
, &lock_ownerstr_hashtbl
[hashval
], so_strhash
) {
3807 if (same_owner_str(op
, owner
, clid
))
3808 return lockowner(op
);
3813 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3815 unsigned int idhashval
;
3817 idhashval
= lockownerid_hashval(lo
->lo_owner
.so_id
);
3818 list_add(&lo
->lo_owner
.so_idhash
, &lock_ownerid_hashtbl
[idhashval
]);
3819 list_add(&lo
->lo_owner
.so_strhash
, &lock_ownerstr_hashtbl
[strhashval
]);
3820 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3824 * Alloc a lock owner structure.
3825 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3828 * strhashval = lock_ownerstr_hashval
3831 static struct nfs4_lockowner
*
3832 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3833 struct nfs4_lockowner
*lo
;
3835 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3838 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3839 lo
->lo_owner
.so_is_open_owner
= 0;
3840 /* It is the openowner seqid that will be incremented in encode in the
3841 * case of new lockowners; so increment the lock seqid manually: */
3842 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3843 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3847 static struct nfs4_ol_stateid
*
3848 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3850 struct nfs4_ol_stateid
*stp
;
3852 stp
= nfs4_alloc_stateid();
3855 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3856 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3857 stp
->st_stateowner
= &lo
->lo_owner
;
3858 stp
->st_stid
.sc_type
= NFS4_LOCK_STID
;
3861 stp
->st_stid
.sc_stateid
.si_boot
= boot_time
;
3862 stp
->st_stid
.sc_stateid
.si_stateownerid
= lo
->lo_owner
.so_id
;
3863 stp
->st_stid
.sc_stateid
.si_fileid
= fp
->fi_id
;
3864 /* note will be incremented before first return to client: */
3865 stp
->st_stid
.sc_stateid
.si_generation
= 0;
3866 hash_stid(&stp
->st_stid
);
3867 stp
->st_access_bmap
= 0;
3868 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3869 stp
->st_openstp
= open_stp
;
3876 check_lock_length(u64 offset
, u64 length
)
3878 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
3879 LOFF_OVERFLOW(offset
, length
)));
3882 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
3884 struct nfs4_file
*fp
= lock_stp
->st_file
;
3885 int oflag
= nfs4_access_to_omode(access
);
3887 if (test_bit(access
, &lock_stp
->st_access_bmap
))
3889 nfs4_file_get_access(fp
, oflag
);
3890 __set_bit(access
, &lock_stp
->st_access_bmap
);
3897 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3898 struct nfsd4_lock
*lock
)
3900 struct nfs4_openowner
*open_sop
= NULL
;
3901 struct nfs4_lockowner
*lock_sop
= NULL
;
3902 struct nfs4_ol_stateid
*lock_stp
;
3903 struct nfs4_file
*fp
;
3904 struct file
*filp
= NULL
;
3905 struct file_lock file_lock
;
3906 struct file_lock conflock
;
3908 unsigned int strhashval
;
3912 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
3913 (long long) lock
->lk_offset
,
3914 (long long) lock
->lk_length
);
3916 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
3917 return nfserr_inval
;
3919 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
3920 S_IFREG
, NFSD_MAY_LOCK
))) {
3921 dprintk("NFSD: nfsd4_lock: permission denied!\n");
3927 if (lock
->lk_is_new
) {
3929 * Client indicates that this is a new lockowner.
3930 * Use open owner and open stateid to create lock owner and
3933 struct nfs4_ol_stateid
*open_stp
= NULL
;
3935 status
= nfserr_stale_clientid
;
3936 if (!nfsd4_has_session(cstate
) &&
3937 STALE_CLIENTID(&lock
->lk_new_clientid
))
3940 /* validate and update open stateid and open seqid */
3941 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
3942 lock
->lk_new_open_seqid
,
3943 &lock
->lk_new_open_stateid
,
3947 open_sop
= openowner(open_stp
->st_stateowner
);
3948 status
= nfserr_bad_stateid
;
3949 if (!nfsd4_has_session(cstate
) &&
3950 !same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
3951 &lock
->v
.new.clientid
))
3953 /* create lockowner and lock stateid */
3954 fp
= open_stp
->st_file
;
3955 strhashval
= lock_ownerstr_hashval(fp
->fi_inode
,
3956 open_sop
->oo_owner
.so_client
->cl_clientid
.cl_id
,
3957 &lock
->v
.new.owner
);
3958 /* XXX: Do we need to check for duplicate stateowners on
3959 * the same file, or should they just be allowed (and
3960 * create new stateids)? */
3961 status
= nfserr_jukebox
;
3962 lock_sop
= alloc_init_lock_stateowner(strhashval
,
3963 open_sop
->oo_owner
.so_client
, open_stp
, lock
);
3964 if (lock_sop
== NULL
)
3966 lock_stp
= alloc_init_lock_stateid(lock_sop
, fp
, open_stp
);
3967 if (lock_stp
== NULL
)
3970 /* lock (lock owner + lock stateid) already exists */
3971 status
= nfs4_preprocess_seqid_op(cstate
,
3972 lock
->lk_old_lock_seqid
,
3973 &lock
->lk_old_lock_stateid
,
3974 NFS4_LOCK_STID
, &lock_stp
);
3977 lock_sop
= lockowner(lock_stp
->st_stateowner
);
3978 fp
= lock_stp
->st_file
;
3980 /* lock_sop and lock_stp have been created or found */
3982 lkflg
= setlkflg(lock
->lk_type
);
3983 status
= nfs4_check_openmode(lock_stp
, lkflg
);
3987 status
= nfserr_grace
;
3988 if (locks_in_grace() && !lock
->lk_reclaim
)
3990 status
= nfserr_no_grace
;
3991 if (!locks_in_grace() && lock
->lk_reclaim
)
3994 locks_init_lock(&file_lock
);
3995 switch (lock
->lk_type
) {
3998 filp
= find_readable_file(lock_stp
->st_file
);
4000 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4001 file_lock
.fl_type
= F_RDLCK
;
4004 case NFS4_WRITEW_LT
:
4005 filp
= find_writeable_file(lock_stp
->st_file
);
4007 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4008 file_lock
.fl_type
= F_WRLCK
;
4011 status
= nfserr_inval
;
4015 status
= nfserr_openmode
;
4018 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4019 file_lock
.fl_pid
= current
->tgid
;
4020 file_lock
.fl_file
= filp
;
4021 file_lock
.fl_flags
= FL_POSIX
;
4022 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4024 file_lock
.fl_start
= lock
->lk_offset
;
4025 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4026 nfs4_transform_lock_offset(&file_lock
);
4029 * Try to lock the file in the VFS.
4030 * Note: locks.c uses the BKL to protect the inode's lock list.
4033 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4035 case 0: /* success! */
4036 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4037 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4041 case (EAGAIN
): /* conflock holds conflicting lock */
4042 status
= nfserr_denied
;
4043 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4044 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4047 status
= nfserr_deadlock
;
4050 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4051 status
= nfserrno(err
);
4055 if (status
&& lock
->lk_is_new
&& lock_sop
)
4056 release_lockowner(lock_sop
);
4057 if (!cstate
->replay_owner
)
4058 nfs4_unlock_state();
4063 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4064 * so we do a temporary open here just to get an open file to pass to
4065 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4068 static int nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4073 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4076 err
= vfs_test_lock(file
, lock
);
4085 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4086 struct nfsd4_lockt
*lockt
)
4088 struct inode
*inode
;
4089 struct file_lock file_lock
;
4090 struct nfs4_lockowner
*lo
;
4094 if (locks_in_grace())
4095 return nfserr_grace
;
4097 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4098 return nfserr_inval
;
4102 status
= nfserr_stale_clientid
;
4103 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4106 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4109 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4110 locks_init_lock(&file_lock
);
4111 switch (lockt
->lt_type
) {
4114 file_lock
.fl_type
= F_RDLCK
;
4117 case NFS4_WRITEW_LT
:
4118 file_lock
.fl_type
= F_WRLCK
;
4121 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4122 status
= nfserr_inval
;
4126 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4128 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4129 file_lock
.fl_pid
= current
->tgid
;
4130 file_lock
.fl_flags
= FL_POSIX
;
4132 file_lock
.fl_start
= lockt
->lt_offset
;
4133 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4135 nfs4_transform_lock_offset(&file_lock
);
4138 error
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4140 status
= nfserrno(error
);
4143 if (file_lock
.fl_type
!= F_UNLCK
) {
4144 status
= nfserr_denied
;
4145 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4148 nfs4_unlock_state();
4153 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4154 struct nfsd4_locku
*locku
)
4156 struct nfs4_ol_stateid
*stp
;
4157 struct file
*filp
= NULL
;
4158 struct file_lock file_lock
;
4162 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4163 (long long) locku
->lu_offset
,
4164 (long long) locku
->lu_length
);
4166 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4167 return nfserr_inval
;
4171 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4172 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4175 filp
= find_any_file(stp
->st_file
);
4177 status
= nfserr_lock_range
;
4181 locks_init_lock(&file_lock
);
4182 file_lock
.fl_type
= F_UNLCK
;
4183 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4184 file_lock
.fl_pid
= current
->tgid
;
4185 file_lock
.fl_file
= filp
;
4186 file_lock
.fl_flags
= FL_POSIX
;
4187 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4188 file_lock
.fl_start
= locku
->lu_offset
;
4190 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4191 nfs4_transform_lock_offset(&file_lock
);
4194 * Try to unlock the file in the VFS.
4196 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4198 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4202 * OK, unlock succeeded; the only thing left to do is update the stateid.
4204 update_stateid(&stp
->st_stid
.sc_stateid
);
4205 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4208 nfs4_unlock_state();
4212 status
= nfserrno(err
);
4218 * 1: locks held by lockowner
4219 * 0: no locks held by lockowner
4222 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4224 struct file_lock
**flpp
;
4225 struct inode
*inode
= filp
->fi_inode
;
4229 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4230 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4241 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4242 struct nfsd4_compound_state
*cstate
,
4243 struct nfsd4_release_lockowner
*rlockowner
)
4245 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4246 struct nfs4_stateowner
*sop
;
4247 struct nfs4_lockowner
*lo
;
4248 struct nfs4_ol_stateid
*stp
;
4249 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4250 struct list_head matches
;
4254 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4255 clid
->cl_boot
, clid
->cl_id
);
4257 /* XXX check for lease expiration */
4259 status
= nfserr_stale_clientid
;
4260 if (STALE_CLIENTID(clid
))
4265 status
= nfserr_locks_held
;
4266 /* XXX: we're doing a linear search through all the lockowners.
4267 * Yipes! For now we'll just hope clients aren't really using
4268 * release_lockowner much, but eventually we have to fix these
4269 * data structures. */
4270 INIT_LIST_HEAD(&matches
);
4271 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4272 list_for_each_entry(sop
, &lock_ownerid_hashtbl
[i
], so_idhash
) {
4273 if (!same_owner_str(sop
, owner
, clid
))
4275 list_for_each_entry(stp
, &sop
->so_stateids
,
4277 lo
= lockowner(sop
);
4278 if (check_for_locks(stp
->st_file
, lo
))
4280 list_add(&lo
->lo_list
, &matches
);
4284 /* Clients probably won't expect us to return with some (but not all)
4285 * of the lockowner state released; so don't release any until all
4286 * have been checked. */
4288 while (!list_empty(&matches
)) {
4289 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4291 /* unhash_stateowner deletes so_perclient only
4292 * for openowners. */
4293 list_del(&lo
->lo_list
);
4294 release_lockowner(lo
);
4297 nfs4_unlock_state();
4301 static inline struct nfs4_client_reclaim
*
4304 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4308 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4310 unsigned int strhashval
= clientstr_hashval(name
);
4311 struct nfs4_client
*clp
;
4313 clp
= find_confirmed_client_by_str(name
, strhashval
);
4318 * failure => all reset bets are off, nfserr_no_grace...
4321 nfs4_client_to_reclaim(const char *name
)
4323 unsigned int strhashval
;
4324 struct nfs4_client_reclaim
*crp
= NULL
;
4326 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4327 crp
= alloc_reclaim();
4330 strhashval
= clientstr_hashval(name
);
4331 INIT_LIST_HEAD(&crp
->cr_strhash
);
4332 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4333 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4334 reclaim_str_hashtbl_size
++;
4339 nfs4_release_reclaim(void)
4341 struct nfs4_client_reclaim
*crp
= NULL
;
4344 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4345 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4346 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4347 struct nfs4_client_reclaim
, cr_strhash
);
4348 list_del(&crp
->cr_strhash
);
4350 reclaim_str_hashtbl_size
--;
4353 BUG_ON(reclaim_str_hashtbl_size
);
4357 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4358 static struct nfs4_client_reclaim
*
4359 nfs4_find_reclaim_client(clientid_t
*clid
)
4361 unsigned int strhashval
;
4362 struct nfs4_client
*clp
;
4363 struct nfs4_client_reclaim
*crp
= NULL
;
4366 /* find clientid in conf_id_hashtbl */
4367 clp
= find_confirmed_client(clid
);
4371 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4372 clp
->cl_name
.len
, clp
->cl_name
.data
,
4375 /* find clp->cl_name in reclaim_str_hashtbl */
4376 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4377 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4378 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4386 * Called from OPEN. Look for clientid in reclaim list.
4389 nfs4_check_open_reclaim(clientid_t
*clid
)
4391 return nfs4_find_reclaim_client(clid
) ? nfs_ok
: nfserr_reclaim_bad
;
4394 /* initialization to perform at module load time: */
4397 nfs4_state_init(void)
4401 status
= nfsd4_init_slabs();
4404 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4405 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4406 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4407 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4408 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4409 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4411 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4412 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4413 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4414 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4416 for (i
= 0; i
< OPEN_OWNER_HASH_SIZE
; i
++) {
4417 INIT_LIST_HEAD(&open_ownerstr_hashtbl
[i
]);
4418 INIT_LIST_HEAD(&open_ownerid_hashtbl
[i
]);
4420 for (i
= 0; i
< STATEID_HASH_SIZE
; i
++)
4421 INIT_LIST_HEAD(&stateid_hashtbl
[i
]);
4422 for (i
= 0; i
< LOCK_HASH_SIZE
; i
++) {
4423 INIT_LIST_HEAD(&lock_ownerid_hashtbl
[i
]);
4424 INIT_LIST_HEAD(&lock_ownerstr_hashtbl
[i
]);
4426 memset(&onestateid
, ~0, sizeof(stateid_t
));
4427 INIT_LIST_HEAD(&close_lru
);
4428 INIT_LIST_HEAD(&client_lru
);
4429 INIT_LIST_HEAD(&del_recall_lru
);
4430 reclaim_str_hashtbl_size
= 0;
4435 nfsd4_load_reboot_recovery_data(void)
4440 nfsd4_init_recdir();
4441 status
= nfsd4_recdir_load();
4442 nfs4_unlock_state();
4444 printk("NFSD: Failure reading reboot recovery data\n");
4448 * Since the lifetime of a delegation isn't limited to that of an open, a
4449 * client may quite reasonably hang on to a delegation as long as it has
4450 * the inode cached. This becomes an obvious problem the first time a
4451 * client's inode cache approaches the size of the server's total memory.
4453 * For now we avoid this problem by imposing a hard limit on the number
4454 * of delegations, which varies according to the server's memory size.
4457 set_max_delegations(void)
4460 * Allow at most 4 delegations per megabyte of RAM. Quick
4461 * estimates suggest that in the worst case (where every delegation
4462 * is for a different inode), a delegation could take about 1.5K,
4463 * giving a worst case usage of about 6% of memory.
4465 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4468 /* initialization to perform when the nfsd service is started: */
4471 __nfs4_state_start(void)
4475 boot_time
= get_seconds();
4476 locks_start_grace(&nfsd4_manager
);
4477 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4479 ret
= set_callback_cred();
4482 laundry_wq
= create_singlethread_workqueue("nfsd4");
4483 if (laundry_wq
== NULL
)
4485 ret
= nfsd4_create_callback_queue();
4487 goto out_free_laundry
;
4488 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4489 set_max_delegations();
4492 destroy_workqueue(laundry_wq
);
4497 nfs4_state_start(void)
4499 nfsd4_load_reboot_recovery_data();
4500 return __nfs4_state_start();
4504 __nfs4_state_shutdown(void)
4507 struct nfs4_client
*clp
= NULL
;
4508 struct nfs4_delegation
*dp
= NULL
;
4509 struct list_head
*pos
, *next
, reaplist
;
4511 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4512 while (!list_empty(&conf_id_hashtbl
[i
])) {
4513 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4516 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4517 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4521 INIT_LIST_HEAD(&reaplist
);
4522 spin_lock(&recall_lock
);
4523 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4524 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4525 list_move(&dp
->dl_recall_lru
, &reaplist
);
4527 spin_unlock(&recall_lock
);
4528 list_for_each_safe(pos
, next
, &reaplist
) {
4529 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4530 list_del_init(&dp
->dl_recall_lru
);
4531 unhash_delegation(dp
);
4534 nfsd4_shutdown_recdir();
4538 nfs4_state_shutdown(void)
4540 cancel_delayed_work_sync(&laundromat_work
);
4541 destroy_workqueue(laundry_wq
);
4542 locks_end_grace(&nfsd4_manager
);
4544 nfs4_release_reclaim();
4545 __nfs4_state_shutdown();
4546 nfs4_unlock_state();
4547 nfsd4_destroy_callback_queue();