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
;
53 #define all_ones {{~0,~0},~0}
54 static const stateid_t one_stateid
= {
56 .si_opaque
= all_ones
,
58 static const stateid_t zero_stateid
= {
61 static const stateid_t currentstateid
= {
65 static u64 current_sessionid
= 1;
67 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
68 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
69 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
71 /* forward declarations */
72 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
76 /* Currently used for almost all code touching nfsv4 state: */
77 static DEFINE_MUTEX(client_mutex
);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(recall_lock
);
86 static struct kmem_cache
*openowner_slab
= NULL
;
87 static struct kmem_cache
*lockowner_slab
= NULL
;
88 static struct kmem_cache
*file_slab
= NULL
;
89 static struct kmem_cache
*stateid_slab
= NULL
;
90 static struct kmem_cache
*deleg_slab
= NULL
;
95 mutex_lock(&client_mutex
);
98 static void free_session(struct kref
*);
100 /* Must be called under the client_lock */
101 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
103 kref_put(&ses
->se_ref
, free_session
);
106 static void nfsd4_get_session(struct nfsd4_session
*ses
)
108 kref_get(&ses
->se_ref
);
112 nfs4_unlock_state(void)
114 mutex_unlock(&client_mutex
);
118 opaque_hashval(const void *ptr
, int nbytes
)
120 unsigned char *cptr
= (unsigned char *) ptr
;
130 static struct list_head del_recall_lru
;
132 static void nfsd4_free_file(struct nfs4_file
*f
)
134 kmem_cache_free(file_slab
, f
);
138 put_nfs4_file(struct nfs4_file
*fi
)
140 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
141 list_del(&fi
->fi_hash
);
142 spin_unlock(&recall_lock
);
149 get_nfs4_file(struct nfs4_file
*fi
)
151 atomic_inc(&fi
->fi_ref
);
154 static int num_delegations
;
155 unsigned int max_delegations
;
158 * Open owner state (share locks)
161 /* hash tables for lock and open owners */
162 #define OWNER_HASH_BITS 8
163 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
164 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
166 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
170 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
172 return ret
& OWNER_HASH_MASK
;
175 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
177 /* hash table for nfs4_file */
178 #define FILE_HASH_BITS 8
179 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
181 static unsigned int file_hashval(struct inode
*ino
)
183 /* XXX: why are we hashing on inode pointer, anyway? */
184 return hash_ptr(ino
, FILE_HASH_BITS
);
187 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
189 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
191 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
192 atomic_inc(&fp
->fi_access
[oflag
]);
195 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
197 if (oflag
== O_RDWR
) {
198 __nfs4_file_get_access(fp
, O_RDONLY
);
199 __nfs4_file_get_access(fp
, O_WRONLY
);
201 __nfs4_file_get_access(fp
, oflag
);
204 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
206 if (fp
->fi_fds
[oflag
]) {
207 fput(fp
->fi_fds
[oflag
]);
208 fp
->fi_fds
[oflag
] = NULL
;
212 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
214 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
215 nfs4_file_put_fd(fp
, oflag
);
217 * It's also safe to get rid of the RDWR open *if*
218 * we no longer have need of the other kind of access
219 * or if we already have the other kind of open:
221 if (fp
->fi_fds
[1-oflag
]
222 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
223 nfs4_file_put_fd(fp
, O_RDWR
);
227 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
229 if (oflag
== O_RDWR
) {
230 __nfs4_file_put_access(fp
, O_RDONLY
);
231 __nfs4_file_put_access(fp
, O_WRONLY
);
233 __nfs4_file_put_access(fp
, oflag
);
236 static inline int get_new_stid(struct nfs4_stid
*stid
)
238 static int min_stateid
= 0;
239 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
243 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
245 * Note: the necessary preallocation was done in
246 * nfs4_alloc_stateid(). The idr code caps the number of
247 * preallocations that can exist at a time, but the state lock
248 * prevents anyone from using ours before we get here:
252 * It shouldn't be a problem to reuse an opaque stateid value.
253 * I don't think it is for 4.1. But with 4.0 I worry that, for
254 * example, a stray write retransmission could be accepted by
255 * the server when it should have been rejected. Therefore,
256 * adopt a trick from the sctp code to attempt to maximize the
257 * amount of time until an id is reused, by ensuring they always
258 * "increase" (mod INT_MAX):
261 min_stateid
= new_stid
+1;
262 if (min_stateid
== INT_MAX
)
267 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
269 stateid_t
*s
= &stid
->sc_stateid
;
272 stid
->sc_type
= type
;
273 stid
->sc_client
= cl
;
274 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
275 new_id
= get_new_stid(stid
);
276 s
->si_opaque
.so_id
= (u32
)new_id
;
277 /* Will be incremented before return to client: */
278 s
->si_generation
= 0;
281 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
283 struct idr
*stateids
= &cl
->cl_stateids
;
285 if (!idr_pre_get(stateids
, GFP_KERNEL
))
288 * Note: if we fail here (or any time between now and the time
289 * we actually get the new idr), we won't need to undo the idr
290 * preallocation, since the idr code caps the number of
291 * preallocated entries.
293 return kmem_cache_alloc(slab
, GFP_KERNEL
);
296 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
298 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
301 static struct nfs4_delegation
*
302 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
304 struct nfs4_delegation
*dp
;
305 struct nfs4_file
*fp
= stp
->st_file
;
307 dprintk("NFSD alloc_init_deleg\n");
309 * Major work on the lease subsystem (for example, to support
310 * calbacks on stat) will be required before we can support
311 * write delegations properly.
313 if (type
!= NFS4_OPEN_DELEGATE_READ
)
315 if (fp
->fi_had_conflict
)
317 if (num_delegations
> max_delegations
)
319 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
322 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
324 * delegation seqid's are never incremented. The 4.1 special
325 * meaning of seqid 0 isn't meaningful, really, but let's avoid
326 * 0 anyway just for consistency and use 1:
328 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
330 INIT_LIST_HEAD(&dp
->dl_perfile
);
331 INIT_LIST_HEAD(&dp
->dl_perclnt
);
332 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
336 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
338 atomic_set(&dp
->dl_count
, 1);
339 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
344 nfs4_put_delegation(struct nfs4_delegation
*dp
)
346 if (atomic_dec_and_test(&dp
->dl_count
)) {
347 dprintk("NFSD: freeing dp %p\n",dp
);
348 put_nfs4_file(dp
->dl_file
);
349 kmem_cache_free(deleg_slab
, dp
);
354 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
356 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
357 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
359 fput(fp
->fi_deleg_file
);
360 fp
->fi_deleg_file
= NULL
;
364 static void unhash_stid(struct nfs4_stid
*s
)
366 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
368 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
371 /* Called under the state lock. */
373 unhash_delegation(struct nfs4_delegation
*dp
)
375 unhash_stid(&dp
->dl_stid
);
376 list_del_init(&dp
->dl_perclnt
);
377 spin_lock(&recall_lock
);
378 list_del_init(&dp
->dl_perfile
);
379 list_del_init(&dp
->dl_recall_lru
);
380 spin_unlock(&recall_lock
);
381 nfs4_put_deleg_lease(dp
->dl_file
);
382 nfs4_put_delegation(dp
);
389 /* client_lock protects the client lru list and session hash table */
390 static DEFINE_SPINLOCK(client_lock
);
392 /* Hash tables for nfs4_clientid state */
393 #define CLIENT_HASH_BITS 4
394 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
395 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
397 static unsigned int clientid_hashval(u32 id
)
399 return id
& CLIENT_HASH_MASK
;
402 static unsigned int clientstr_hashval(const char *name
)
404 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
408 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
409 * used in reboot/reset lease grace period processing
411 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
412 * setclientid_confirmed info.
414 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
417 * client_lru holds client queue ordered by nfs4_client.cl_time
420 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
421 * for last close replay.
423 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
424 static int reclaim_str_hashtbl_size
= 0;
425 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
426 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
427 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
428 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
429 static struct list_head client_lru
;
430 static struct list_head close_lru
;
433 * We store the NONE, READ, WRITE, and BOTH bits separately in the
434 * st_{access,deny}_bmap field of the stateid, in order to track not
435 * only what share bits are currently in force, but also what
436 * combinations of share bits previous opens have used. This allows us
437 * to enforce the recommendation of rfc 3530 14.2.19 that the server
438 * return an error if the client attempt to downgrade to a combination
439 * of share bits not explicable by closing some of its previous opens.
441 * XXX: This enforcement is actually incomplete, since we don't keep
442 * track of access/deny bit combinations; so, e.g., we allow:
444 * OPEN allow read, deny write
445 * OPEN allow both, deny none
446 * DOWNGRADE allow read, deny none
448 * which we should reject.
451 set_access(unsigned int *access
, unsigned long bmap
) {
455 for (i
= 1; i
< 4; i
++) {
456 if (test_bit(i
, &bmap
))
462 set_deny(unsigned int *deny
, unsigned long bmap
) {
466 for (i
= 0; i
< 4; i
++) {
467 if (test_bit(i
, &bmap
))
473 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
474 unsigned int access
, deny
;
476 set_access(&access
, stp
->st_access_bmap
);
477 set_deny(&deny
, stp
->st_deny_bmap
);
478 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
483 static int nfs4_access_to_omode(u32 access
)
485 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
486 case NFS4_SHARE_ACCESS_READ
:
488 case NFS4_SHARE_ACCESS_WRITE
:
490 case NFS4_SHARE_ACCESS_BOTH
:
496 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
498 list_del(&stp
->st_perfile
);
499 list_del(&stp
->st_perstateowner
);
502 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
506 if (stp
->st_access_bmap
) {
507 for (i
= 1; i
< 4; i
++) {
508 if (test_bit(i
, &stp
->st_access_bmap
))
509 nfs4_file_put_access(stp
->st_file
,
510 nfs4_access_to_omode(i
));
511 __clear_bit(i
, &stp
->st_access_bmap
);
514 put_nfs4_file(stp
->st_file
);
518 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
520 kmem_cache_free(stateid_slab
, stp
);
523 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
527 unhash_generic_stateid(stp
);
528 unhash_stid(&stp
->st_stid
);
529 file
= find_any_file(stp
->st_file
);
531 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
532 close_generic_stateid(stp
);
533 free_generic_stateid(stp
);
536 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
538 struct nfs4_ol_stateid
*stp
;
540 list_del(&lo
->lo_owner
.so_strhash
);
541 list_del(&lo
->lo_perstateid
);
542 list_del(&lo
->lo_owner_ino_hash
);
543 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
544 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
545 struct nfs4_ol_stateid
, st_perstateowner
);
546 release_lock_stateid(stp
);
550 static void release_lockowner(struct nfs4_lockowner
*lo
)
552 unhash_lockowner(lo
);
553 nfs4_free_lockowner(lo
);
557 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
559 struct nfs4_lockowner
*lo
;
561 while (!list_empty(&open_stp
->st_lockowners
)) {
562 lo
= list_entry(open_stp
->st_lockowners
.next
,
563 struct nfs4_lockowner
, lo_perstateid
);
564 release_lockowner(lo
);
568 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
570 unhash_generic_stateid(stp
);
571 release_stateid_lockowners(stp
);
572 close_generic_stateid(stp
);
575 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
577 unhash_open_stateid(stp
);
578 unhash_stid(&stp
->st_stid
);
579 free_generic_stateid(stp
);
582 static void unhash_openowner(struct nfs4_openowner
*oo
)
584 struct nfs4_ol_stateid
*stp
;
586 list_del(&oo
->oo_owner
.so_strhash
);
587 list_del(&oo
->oo_perclient
);
588 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
589 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
590 struct nfs4_ol_stateid
, st_perstateowner
);
591 release_open_stateid(stp
);
595 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
597 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
600 unhash_stid(&s
->st_stid
);
601 free_generic_stateid(s
);
602 oo
->oo_last_closed_stid
= NULL
;
606 static void release_openowner(struct nfs4_openowner
*oo
)
608 unhash_openowner(oo
);
609 list_del(&oo
->oo_close_lru
);
610 release_last_closed_stateid(oo
);
611 nfs4_free_openowner(oo
);
614 #define SESSION_HASH_SIZE 512
615 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
618 hash_sessionid(struct nfs4_sessionid
*sessionid
)
620 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
622 return sid
->sequence
% SESSION_HASH_SIZE
;
627 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
629 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
630 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
634 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
641 gen_sessionid(struct nfsd4_session
*ses
)
643 struct nfs4_client
*clp
= ses
->se_client
;
644 struct nfsd4_sessionid
*sid
;
646 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
647 sid
->clientid
= clp
->cl_clientid
;
648 sid
->sequence
= current_sessionid
++;
653 * The protocol defines ca_maxresponssize_cached to include the size of
654 * the rpc header, but all we need to cache is the data starting after
655 * the end of the initial SEQUENCE operation--the rest we regenerate
656 * each time. Therefore we can advertise a ca_maxresponssize_cached
657 * value that is the number of bytes in our cache plus a few additional
658 * bytes. In order to stay on the safe side, and not promise more than
659 * we can cache, those additional bytes must be the minimum possible: 24
660 * bytes of rpc header (xid through accept state, with AUTH_NULL
661 * verifier), 12 for the compound header (with zero-length tag), and 44
662 * for the SEQUENCE op response:
664 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
667 free_session_slots(struct nfsd4_session
*ses
)
671 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
672 kfree(ses
->se_slots
[i
]);
676 * We don't actually need to cache the rpc and session headers, so we
677 * can allocate a little less for each slot:
679 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
681 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
684 static int nfsd4_sanitize_slot_size(u32 size
)
686 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
687 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
693 * XXX: If we run out of reserved DRC memory we could (up to a point)
694 * re-negotiate active sessions and reduce their slot usage to make
695 * room for new connections. For now we just fail the create session.
697 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
701 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
703 spin_lock(&nfsd_drc_lock
);
704 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
705 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
706 num
= min_t(int, num
, avail
/ slotsize
);
707 nfsd_drc_mem_used
+= num
* slotsize
;
708 spin_unlock(&nfsd_drc_lock
);
713 static void nfsd4_put_drc_mem(int slotsize
, int num
)
715 spin_lock(&nfsd_drc_lock
);
716 nfsd_drc_mem_used
-= slotsize
* num
;
717 spin_unlock(&nfsd_drc_lock
);
720 static struct nfsd4_session
*alloc_session(int slotsize
, int numslots
)
722 struct nfsd4_session
*new;
725 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
726 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
727 mem
= numslots
* sizeof(struct nfsd4_slot
*);
729 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
732 /* allocate each struct nfsd4_slot and data cache in one piece */
733 for (i
= 0; i
< numslots
; i
++) {
734 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
735 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
736 if (!new->se_slots
[i
])
742 kfree(new->se_slots
[i
]);
747 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
749 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
751 new->maxreqs
= numslots
;
752 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
753 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
754 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
755 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
756 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
759 static void free_conn(struct nfsd4_conn
*c
)
761 svc_xprt_put(c
->cn_xprt
);
765 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
767 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
768 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
770 spin_lock(&clp
->cl_lock
);
771 if (!list_empty(&c
->cn_persession
)) {
772 list_del(&c
->cn_persession
);
775 spin_unlock(&clp
->cl_lock
);
776 nfsd4_probe_callback(clp
);
779 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
781 struct nfsd4_conn
*conn
;
783 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
786 svc_xprt_get(rqstp
->rq_xprt
);
787 conn
->cn_xprt
= rqstp
->rq_xprt
;
788 conn
->cn_flags
= flags
;
789 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
793 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
795 conn
->cn_session
= ses
;
796 list_add(&conn
->cn_persession
, &ses
->se_conns
);
799 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
801 struct nfs4_client
*clp
= ses
->se_client
;
803 spin_lock(&clp
->cl_lock
);
804 __nfsd4_hash_conn(conn
, ses
);
805 spin_unlock(&clp
->cl_lock
);
808 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
810 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
811 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
814 static __be32
nfsd4_new_conn(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
, u32 dir
)
816 struct nfsd4_conn
*conn
;
819 conn
= alloc_conn(rqstp
, dir
);
821 return nfserr_jukebox
;
822 nfsd4_hash_conn(conn
, ses
);
823 ret
= nfsd4_register_conn(conn
);
825 /* oops; xprt is already down: */
826 nfsd4_conn_lost(&conn
->cn_xpt_user
);
830 static __be32
nfsd4_new_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_session
*ses
)
832 u32 dir
= NFS4_CDFC4_FORE
;
834 if (ses
->se_flags
& SESSION4_BACK_CHAN
)
835 dir
|= NFS4_CDFC4_BACK
;
837 return nfsd4_new_conn(rqstp
, ses
, dir
);
840 /* must be called under client_lock */
841 static void nfsd4_del_conns(struct nfsd4_session
*s
)
843 struct nfs4_client
*clp
= s
->se_client
;
844 struct nfsd4_conn
*c
;
846 spin_lock(&clp
->cl_lock
);
847 while (!list_empty(&s
->se_conns
)) {
848 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
849 list_del_init(&c
->cn_persession
);
850 spin_unlock(&clp
->cl_lock
);
852 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
855 spin_lock(&clp
->cl_lock
);
857 spin_unlock(&clp
->cl_lock
);
860 static void free_session(struct kref
*kref
)
862 struct nfsd4_session
*ses
;
865 BUG_ON(!spin_is_locked(&client_lock
));
866 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
867 nfsd4_del_conns(ses
);
868 spin_lock(&nfsd_drc_lock
);
869 mem
= ses
->se_fchannel
.maxreqs
* slot_bytes(&ses
->se_fchannel
);
870 nfsd_drc_mem_used
-= mem
;
871 spin_unlock(&nfsd_drc_lock
);
872 free_session_slots(ses
);
876 void nfsd4_put_session(struct nfsd4_session
*ses
)
878 spin_lock(&client_lock
);
879 nfsd4_put_session_locked(ses
);
880 spin_unlock(&client_lock
);
883 static struct nfsd4_session
*alloc_init_session(struct svc_rqst
*rqstp
, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
885 struct nfsd4_session
*new;
886 struct nfsd4_channel_attrs
*fchan
= &cses
->fore_channel
;
887 int numslots
, slotsize
;
892 * Note decreasing slot size below client's request may
893 * make it difficult for client to function correctly, whereas
894 * decreasing the number of slots will (just?) affect
895 * performance. When short on memory we therefore prefer to
896 * decrease number of slots instead of their size.
898 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
899 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
903 new = alloc_session(slotsize
, numslots
);
905 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
908 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
910 new->se_client
= clp
;
913 INIT_LIST_HEAD(&new->se_conns
);
915 new->se_cb_seq_nr
= 1;
916 new->se_flags
= cses
->flags
;
917 new->se_cb_prog
= cses
->callback_prog
;
918 kref_init(&new->se_ref
);
919 idx
= hash_sessionid(&new->se_sessionid
);
920 spin_lock(&client_lock
);
921 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
922 spin_lock(&clp
->cl_lock
);
923 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
924 spin_unlock(&clp
->cl_lock
);
925 spin_unlock(&client_lock
);
927 status
= nfsd4_new_conn_from_crses(rqstp
, new);
928 /* whoops: benny points out, status is ignored! (err, or bogus) */
930 spin_lock(&client_lock
);
931 free_session(&new->se_ref
);
932 spin_unlock(&client_lock
);
935 if (cses
->flags
& SESSION4_BACK_CHAN
) {
936 struct sockaddr
*sa
= svc_addr(rqstp
);
938 * This is a little silly; with sessions there's no real
939 * use for the callback address. Use the peer address
940 * as a reasonable default for now, but consider fixing
941 * the rpc client not to require an address in the
944 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
945 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
947 nfsd4_probe_callback(clp
);
951 /* caller must hold client_lock */
952 static struct nfsd4_session
*
953 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
955 struct nfsd4_session
*elem
;
958 dump_sessionid(__func__
, sessionid
);
959 idx
= hash_sessionid(sessionid
);
960 /* Search in the appropriate list */
961 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
962 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
963 NFS4_MAX_SESSIONID_LEN
)) {
968 dprintk("%s: session not found\n", __func__
);
972 /* caller must hold client_lock */
974 unhash_session(struct nfsd4_session
*ses
)
976 list_del(&ses
->se_hash
);
977 spin_lock(&ses
->se_client
->cl_lock
);
978 list_del(&ses
->se_perclnt
);
979 spin_unlock(&ses
->se_client
->cl_lock
);
982 /* must be called under the client_lock */
984 renew_client_locked(struct nfs4_client
*clp
)
986 if (is_client_expired(clp
)) {
987 dprintk("%s: client (clientid %08x/%08x) already expired\n",
989 clp
->cl_clientid
.cl_boot
,
990 clp
->cl_clientid
.cl_id
);
994 dprintk("renewing client (clientid %08x/%08x)\n",
995 clp
->cl_clientid
.cl_boot
,
996 clp
->cl_clientid
.cl_id
);
997 list_move_tail(&clp
->cl_lru
, &client_lru
);
998 clp
->cl_time
= get_seconds();
1002 renew_client(struct nfs4_client
*clp
)
1004 spin_lock(&client_lock
);
1005 renew_client_locked(clp
);
1006 spin_unlock(&client_lock
);
1009 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1011 STALE_CLIENTID(clientid_t
*clid
)
1013 if (clid
->cl_boot
== boot_time
)
1015 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1016 clid
->cl_boot
, clid
->cl_id
, boot_time
);
1021 * XXX Should we use a slab cache ?
1022 * This type of memory management is somewhat inefficient, but we use it
1023 * anyway since SETCLIENTID is not a common operation.
1025 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1027 struct nfs4_client
*clp
;
1029 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1032 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1033 if (clp
->cl_name
.data
== NULL
) {
1037 clp
->cl_name
.len
= name
.len
;
1042 free_client(struct nfs4_client
*clp
)
1044 BUG_ON(!spin_is_locked(&client_lock
));
1045 while (!list_empty(&clp
->cl_sessions
)) {
1046 struct nfsd4_session
*ses
;
1047 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1049 list_del(&ses
->se_perclnt
);
1050 nfsd4_put_session_locked(ses
);
1052 if (clp
->cl_cred
.cr_group_info
)
1053 put_group_info(clp
->cl_cred
.cr_group_info
);
1054 kfree(clp
->cl_principal
);
1055 kfree(clp
->cl_name
.data
);
1060 release_session_client(struct nfsd4_session
*session
)
1062 struct nfs4_client
*clp
= session
->se_client
;
1064 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1066 if (is_client_expired(clp
)) {
1068 session
->se_client
= NULL
;
1070 renew_client_locked(clp
);
1071 spin_unlock(&client_lock
);
1074 /* must be called under the client_lock */
1076 unhash_client_locked(struct nfs4_client
*clp
)
1078 struct nfsd4_session
*ses
;
1080 mark_client_expired(clp
);
1081 list_del(&clp
->cl_lru
);
1082 spin_lock(&clp
->cl_lock
);
1083 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1084 list_del_init(&ses
->se_hash
);
1085 spin_unlock(&clp
->cl_lock
);
1089 expire_client(struct nfs4_client
*clp
)
1091 struct nfs4_openowner
*oo
;
1092 struct nfs4_delegation
*dp
;
1093 struct list_head reaplist
;
1095 INIT_LIST_HEAD(&reaplist
);
1096 spin_lock(&recall_lock
);
1097 while (!list_empty(&clp
->cl_delegations
)) {
1098 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1099 list_del_init(&dp
->dl_perclnt
);
1100 list_move(&dp
->dl_recall_lru
, &reaplist
);
1102 spin_unlock(&recall_lock
);
1103 while (!list_empty(&reaplist
)) {
1104 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1105 unhash_delegation(dp
);
1107 while (!list_empty(&clp
->cl_openowners
)) {
1108 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1109 release_openowner(oo
);
1111 nfsd4_shutdown_callback(clp
);
1112 if (clp
->cl_cb_conn
.cb_xprt
)
1113 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1114 list_del(&clp
->cl_idhash
);
1115 list_del(&clp
->cl_strhash
);
1116 spin_lock(&client_lock
);
1117 unhash_client_locked(clp
);
1118 if (atomic_read(&clp
->cl_refcount
) == 0)
1120 spin_unlock(&client_lock
);
1123 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1125 memcpy(target
->cl_verifier
.data
, source
->data
,
1126 sizeof(target
->cl_verifier
.data
));
1129 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1131 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1132 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1135 static void copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1137 target
->cr_uid
= source
->cr_uid
;
1138 target
->cr_gid
= source
->cr_gid
;
1139 target
->cr_group_info
= source
->cr_group_info
;
1140 get_group_info(target
->cr_group_info
);
1143 static int same_name(const char *n1
, const char *n2
)
1145 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1149 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1151 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1155 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1157 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1160 /* XXX what about NGROUP */
1162 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1164 return cr1
->cr_uid
== cr2
->cr_uid
;
1167 static void gen_clid(struct nfs4_client
*clp
)
1169 static u32 current_clientid
= 1;
1171 clp
->cl_clientid
.cl_boot
= boot_time
;
1172 clp
->cl_clientid
.cl_id
= current_clientid
++;
1175 static void gen_confirm(struct nfs4_client
*clp
)
1180 verf
[0] = (__be32
)get_seconds();
1181 verf
[1] = (__be32
)i
++;
1182 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1185 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1187 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1190 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1192 struct nfs4_stid
*s
;
1194 s
= find_stateid(cl
, t
);
1197 if (typemask
& s
->sc_type
)
1202 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1203 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1205 struct nfs4_client
*clp
;
1206 struct sockaddr
*sa
= svc_addr(rqstp
);
1209 clp
= alloc_client(name
);
1213 INIT_LIST_HEAD(&clp
->cl_sessions
);
1215 princ
= svc_gss_principal(rqstp
);
1217 clp
->cl_principal
= kstrdup(princ
, GFP_KERNEL
);
1218 if (clp
->cl_principal
== NULL
) {
1219 spin_lock(&client_lock
);
1221 spin_unlock(&client_lock
);
1226 idr_init(&clp
->cl_stateids
);
1227 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1228 atomic_set(&clp
->cl_refcount
, 0);
1229 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1230 INIT_LIST_HEAD(&clp
->cl_idhash
);
1231 INIT_LIST_HEAD(&clp
->cl_strhash
);
1232 INIT_LIST_HEAD(&clp
->cl_openowners
);
1233 INIT_LIST_HEAD(&clp
->cl_delegations
);
1234 INIT_LIST_HEAD(&clp
->cl_lru
);
1235 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1236 spin_lock_init(&clp
->cl_lock
);
1237 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1238 clp
->cl_time
= get_seconds();
1239 clear_bit(0, &clp
->cl_cb_slot_busy
);
1240 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1241 copy_verf(clp
, verf
);
1242 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1243 clp
->cl_flavor
= rqstp
->rq_flavor
;
1244 copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1246 clp
->cl_cb_session
= NULL
;
1251 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1253 unsigned int idhashval
;
1255 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1256 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1257 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1262 move_to_confirmed(struct nfs4_client
*clp
)
1264 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1265 unsigned int strhashval
;
1267 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1268 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1269 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1270 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1274 static struct nfs4_client
*
1275 find_confirmed_client(clientid_t
*clid
)
1277 struct nfs4_client
*clp
;
1278 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1280 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1281 if (same_clid(&clp
->cl_clientid
, clid
)) {
1289 static struct nfs4_client
*
1290 find_unconfirmed_client(clientid_t
*clid
)
1292 struct nfs4_client
*clp
;
1293 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1295 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1296 if (same_clid(&clp
->cl_clientid
, clid
))
1302 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1304 return clp
->cl_exchange_flags
!= 0;
1307 static struct nfs4_client
*
1308 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1310 struct nfs4_client
*clp
;
1312 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1313 if (same_name(clp
->cl_recdir
, dname
))
1319 static struct nfs4_client
*
1320 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1322 struct nfs4_client
*clp
;
1324 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1325 if (same_name(clp
->cl_recdir
, dname
))
1332 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1334 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1335 struct sockaddr
*sa
= svc_addr(rqstp
);
1336 u32 scopeid
= rpc_get_scope_id(sa
);
1337 unsigned short expected_family
;
1339 /* Currently, we only support tcp and tcp6 for the callback channel */
1340 if (se
->se_callback_netid_len
== 3 &&
1341 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1342 expected_family
= AF_INET
;
1343 else if (se
->se_callback_netid_len
== 4 &&
1344 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1345 expected_family
= AF_INET6
;
1349 conn
->cb_addrlen
= rpc_uaddr2sockaddr(&init_net
, se
->se_callback_addr_val
,
1350 se
->se_callback_addr_len
,
1351 (struct sockaddr
*)&conn
->cb_addr
,
1352 sizeof(conn
->cb_addr
));
1354 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1357 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1358 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1360 conn
->cb_prog
= se
->se_callback_prog
;
1361 conn
->cb_ident
= se
->se_callback_ident
;
1362 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1365 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1366 conn
->cb_addrlen
= 0;
1367 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1368 "will not receive delegations\n",
1369 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1375 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1378 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1380 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1383 dprintk("--> %s slot %p\n", __func__
, slot
);
1385 slot
->sl_opcnt
= resp
->opcnt
;
1386 slot
->sl_status
= resp
->cstate
.status
;
1388 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1389 if (nfsd4_not_cached(resp
)) {
1390 slot
->sl_datalen
= 0;
1393 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1394 base
= (char *)resp
->cstate
.datap
-
1395 (char *)resp
->xbuf
->head
[0].iov_base
;
1396 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1398 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1403 * Encode the replay sequence operation from the slot values.
1404 * If cachethis is FALSE encode the uncached rep error on the next
1405 * operation which sets resp->p and increments resp->opcnt for
1406 * nfs4svc_encode_compoundres.
1410 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1411 struct nfsd4_compoundres
*resp
)
1413 struct nfsd4_op
*op
;
1414 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1416 /* Encode the replayed sequence operation */
1417 op
= &args
->ops
[resp
->opcnt
- 1];
1418 nfsd4_encode_operation(resp
, op
);
1420 /* Return nfserr_retry_uncached_rep in next operation. */
1421 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1422 op
= &args
->ops
[resp
->opcnt
++];
1423 op
->status
= nfserr_retry_uncached_rep
;
1424 nfsd4_encode_operation(resp
, op
);
1430 * The sequence operation is not cached because we can use the slot and
1434 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1435 struct nfsd4_sequence
*seq
)
1437 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1440 dprintk("--> %s slot %p\n", __func__
, slot
);
1442 /* Either returns 0 or nfserr_retry_uncached */
1443 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1444 if (status
== nfserr_retry_uncached_rep
)
1447 /* The sequence operation has been encoded, cstate->datap set. */
1448 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1450 resp
->opcnt
= slot
->sl_opcnt
;
1451 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1452 status
= slot
->sl_status
;
1458 * Set the exchange_id flags returned by the server.
1461 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1463 /* pNFS is not supported */
1464 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1466 /* Referrals are supported, Migration is not. */
1467 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1469 /* set the wire flags to return to client. */
1470 clid
->flags
= new->cl_exchange_flags
;
1474 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1475 struct nfsd4_compound_state
*cstate
,
1476 struct nfsd4_exchange_id
*exid
)
1478 struct nfs4_client
*unconf
, *conf
, *new;
1480 unsigned int strhashval
;
1481 char dname
[HEXDIR_LEN
];
1482 char addr_str
[INET6_ADDRSTRLEN
];
1483 nfs4_verifier verf
= exid
->verifier
;
1484 struct sockaddr
*sa
= svc_addr(rqstp
);
1486 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1487 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1488 "ip_addr=%s flags %x, spa_how %d\n",
1489 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1490 addr_str
, exid
->flags
, exid
->spa_how
);
1492 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1493 return nfserr_inval
;
1495 /* Currently only support SP4_NONE */
1496 switch (exid
->spa_how
) {
1500 return nfserr_serverfault
;
1502 BUG(); /* checked by xdr code */
1504 return nfserr_serverfault
; /* no excuse :-/ */
1507 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1512 strhashval
= clientstr_hashval(dname
);
1517 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1519 if (!clp_used_exchangeid(conf
)) {
1520 status
= nfserr_clid_inuse
; /* XXX: ? */
1523 if (!same_verf(&verf
, &conf
->cl_verifier
)) {
1524 /* 18.35.4 case 8 */
1525 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1526 status
= nfserr_not_same
;
1529 /* Client reboot: destroy old state */
1530 expire_client(conf
);
1533 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
1534 /* 18.35.4 case 9 */
1535 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1536 status
= nfserr_perm
;
1539 expire_client(conf
);
1543 * Set bit when the owner id and verifier map to an already
1544 * confirmed client id (18.35.3).
1546 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1549 * Falling into 18.35.4 case 2, possible router replay.
1550 * Leave confirmed record intact and return same result.
1552 copy_verf(conf
, &verf
);
1557 /* 18.35.4 case 7 */
1558 if (exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
) {
1559 status
= nfserr_noent
;
1563 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1566 * Possible retry or client restart. Per 18.35.4 case 4,
1567 * a new unconfirmed record should be generated regardless
1568 * of whether any properties have changed.
1570 expire_client(unconf
);
1575 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1577 status
= nfserr_jukebox
;
1582 add_to_unconfirmed(new, strhashval
);
1584 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1585 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1588 nfsd4_set_ex_flags(new, exid
);
1590 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1591 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1595 nfs4_unlock_state();
1597 dprintk("nfsd4_exchange_id returns %d\n", ntohl(status
));
1602 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1604 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1607 /* The slot is in use, and no response has been sent. */
1609 if (seqid
== slot_seqid
)
1610 return nfserr_jukebox
;
1612 return nfserr_seq_misordered
;
1614 /* Note unsigned 32-bit arithmetic handles wraparound: */
1615 if (likely(seqid
== slot_seqid
+ 1))
1617 if (seqid
== slot_seqid
)
1618 return nfserr_replay_cache
;
1619 return nfserr_seq_misordered
;
1623 * Cache the create session result into the create session single DRC
1624 * slot cache by saving the xdr structure. sl_seqid has been set.
1625 * Do this for solo or embedded create session operations.
1628 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1629 struct nfsd4_clid_slot
*slot
, int nfserr
)
1631 slot
->sl_status
= nfserr
;
1632 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1636 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1637 struct nfsd4_clid_slot
*slot
)
1639 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1640 return slot
->sl_status
;
1643 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1644 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1645 1 + /* MIN tag is length with zero, only length */ \
1646 3 + /* version, opcount, opcode */ \
1647 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1648 /* seqid, slotID, slotID, cache */ \
1649 4 ) * sizeof(__be32))
1651 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1652 2 + /* verifier: AUTH_NULL, length 0 */\
1654 1 + /* MIN tag is length with zero, only length */ \
1655 3 + /* opcount, opcode, opstatus*/ \
1656 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1657 /* seqid, slotID, slotID, slotID, status */ \
1658 5 ) * sizeof(__be32))
1660 static __be32
check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1662 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1663 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1667 nfsd4_create_session(struct svc_rqst
*rqstp
,
1668 struct nfsd4_compound_state
*cstate
,
1669 struct nfsd4_create_session
*cr_ses
)
1671 struct sockaddr
*sa
= svc_addr(rqstp
);
1672 struct nfs4_client
*conf
, *unconf
;
1673 struct nfsd4_session
*new;
1674 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1675 bool confirm_me
= false;
1678 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1679 return nfserr_inval
;
1682 unconf
= find_unconfirmed_client(&cr_ses
->clientid
);
1683 conf
= find_confirmed_client(&cr_ses
->clientid
);
1686 cs_slot
= &conf
->cl_cs_slot
;
1687 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1688 if (status
== nfserr_replay_cache
) {
1689 dprintk("Got a create_session replay! seqid= %d\n",
1691 /* Return the cached reply status */
1692 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1694 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1695 status
= nfserr_seq_misordered
;
1696 dprintk("Sequence misordered!\n");
1697 dprintk("Expected seqid= %d but got seqid= %d\n",
1698 cs_slot
->sl_seqid
, cr_ses
->seqid
);
1701 } else if (unconf
) {
1702 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1703 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1704 status
= nfserr_clid_inuse
;
1708 cs_slot
= &unconf
->cl_cs_slot
;
1709 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1711 /* an unconfirmed replay returns misordered */
1712 status
= nfserr_seq_misordered
;
1719 status
= nfserr_stale_clientid
;
1724 * XXX: we should probably set this at creation time, and check
1725 * for consistent minorversion use throughout:
1727 conf
->cl_minorversion
= 1;
1729 * We do not support RDMA or persistent sessions
1731 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1732 cr_ses
->flags
&= ~SESSION4_RDMA
;
1734 status
= nfserr_toosmall
;
1735 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1738 status
= nfserr_jukebox
;
1739 new = alloc_init_session(rqstp
, conf
, cr_ses
);
1743 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1744 NFS4_MAX_SESSIONID_LEN
);
1745 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1746 sizeof(struct nfsd4_channel_attrs
));
1747 cs_slot
->sl_seqid
++;
1748 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1750 /* cache solo and embedded create sessions under the state lock */
1751 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1753 move_to_confirmed(conf
);
1755 nfs4_unlock_state();
1756 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1760 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1762 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1763 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1765 return argp
->opcnt
== resp
->opcnt
;
1768 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1771 case NFS4_CDFC4_FORE
:
1772 case NFS4_CDFC4_BACK
:
1774 case NFS4_CDFC4_FORE_OR_BOTH
:
1775 case NFS4_CDFC4_BACK_OR_BOTH
:
1776 *dir
= NFS4_CDFC4_BOTH
;
1779 return nfserr_inval
;
1782 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1783 struct nfsd4_compound_state
*cstate
,
1784 struct nfsd4_bind_conn_to_session
*bcts
)
1788 if (!nfsd4_last_compound_op(rqstp
))
1789 return nfserr_not_only_op
;
1790 spin_lock(&client_lock
);
1791 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1792 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1793 * client_lock iself: */
1794 if (cstate
->session
) {
1795 nfsd4_get_session(cstate
->session
);
1796 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1798 spin_unlock(&client_lock
);
1799 if (!cstate
->session
)
1800 return nfserr_badsession
;
1802 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1804 nfsd4_new_conn(rqstp
, cstate
->session
, bcts
->dir
);
1808 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1812 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1816 nfsd4_destroy_session(struct svc_rqst
*r
,
1817 struct nfsd4_compound_state
*cstate
,
1818 struct nfsd4_destroy_session
*sessionid
)
1820 struct nfsd4_session
*ses
;
1821 u32 status
= nfserr_badsession
;
1824 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1825 * - Should we return nfserr_back_chan_busy if waiting for
1826 * callbacks on to-be-destroyed session?
1827 * - Do we need to clear any callback info from previous session?
1830 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1831 if (!nfsd4_last_compound_op(r
))
1832 return nfserr_not_only_op
;
1834 dump_sessionid(__func__
, &sessionid
->sessionid
);
1835 spin_lock(&client_lock
);
1836 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1838 spin_unlock(&client_lock
);
1842 unhash_session(ses
);
1843 spin_unlock(&client_lock
);
1846 nfsd4_probe_callback_sync(ses
->se_client
);
1847 nfs4_unlock_state();
1849 spin_lock(&client_lock
);
1850 nfsd4_del_conns(ses
);
1851 nfsd4_put_session_locked(ses
);
1852 spin_unlock(&client_lock
);
1855 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1859 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1861 struct nfsd4_conn
*c
;
1863 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1864 if (c
->cn_xprt
== xpt
) {
1871 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1873 struct nfs4_client
*clp
= ses
->se_client
;
1874 struct nfsd4_conn
*c
;
1877 spin_lock(&clp
->cl_lock
);
1878 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1880 spin_unlock(&clp
->cl_lock
);
1884 __nfsd4_hash_conn(new, ses
);
1885 spin_unlock(&clp
->cl_lock
);
1886 ret
= nfsd4_register_conn(new);
1888 /* oops; xprt is already down: */
1889 nfsd4_conn_lost(&new->cn_xpt_user
);
1893 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1895 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1897 return args
->opcnt
> session
->se_fchannel
.maxops
;
1900 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1901 struct nfsd4_session
*session
)
1903 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1905 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
1909 nfsd4_sequence(struct svc_rqst
*rqstp
,
1910 struct nfsd4_compound_state
*cstate
,
1911 struct nfsd4_sequence
*seq
)
1913 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1914 struct nfsd4_session
*session
;
1915 struct nfsd4_slot
*slot
;
1916 struct nfsd4_conn
*conn
;
1919 if (resp
->opcnt
!= 1)
1920 return nfserr_sequence_pos
;
1923 * Will be either used or freed by nfsd4_sequence_check_conn
1926 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
1928 return nfserr_jukebox
;
1930 spin_lock(&client_lock
);
1931 status
= nfserr_badsession
;
1932 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
1936 status
= nfserr_too_many_ops
;
1937 if (nfsd4_session_too_many_ops(rqstp
, session
))
1940 status
= nfserr_req_too_big
;
1941 if (nfsd4_request_too_big(rqstp
, session
))
1944 status
= nfserr_badslot
;
1945 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
1948 slot
= session
->se_slots
[seq
->slotid
];
1949 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
1951 /* We do not negotiate the number of slots yet, so set the
1952 * maxslots to the session maxreqs which is used to encode
1953 * sr_highest_slotid and the sr_target_slot id to maxslots */
1954 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
1956 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
1957 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
1958 if (status
== nfserr_replay_cache
) {
1959 status
= nfserr_seq_misordered
;
1960 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
1962 cstate
->slot
= slot
;
1963 cstate
->session
= session
;
1964 /* Return the cached reply status and set cstate->status
1965 * for nfsd4_proc_compound processing */
1966 status
= nfsd4_replay_cache_entry(resp
, seq
);
1967 cstate
->status
= nfserr_replay_cache
;
1973 nfsd4_sequence_check_conn(conn
, session
);
1976 /* Success! bump slot seqid */
1977 slot
->sl_seqid
= seq
->seqid
;
1978 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
1980 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
1982 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
1984 cstate
->slot
= slot
;
1985 cstate
->session
= session
;
1988 /* Hold a session reference until done processing the compound. */
1989 if (cstate
->session
) {
1990 struct nfs4_client
*clp
= session
->se_client
;
1992 nfsd4_get_session(cstate
->session
);
1993 atomic_inc(&clp
->cl_refcount
);
1994 switch (clp
->cl_cb_state
) {
1996 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
1998 case NFSD4_CB_FAULT
:
1999 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2002 seq
->status_flags
= 0;
2006 spin_unlock(&client_lock
);
2007 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2011 static inline bool has_resources(struct nfs4_client
*clp
)
2013 return !list_empty(&clp
->cl_openowners
)
2014 || !list_empty(&clp
->cl_delegations
)
2015 || !list_empty(&clp
->cl_sessions
);
2019 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2021 struct nfs4_client
*conf
, *unconf
, *clp
;
2025 unconf
= find_unconfirmed_client(&dc
->clientid
);
2026 conf
= find_confirmed_client(&dc
->clientid
);
2031 if (!is_client_expired(conf
) && has_resources(conf
)) {
2032 status
= nfserr_clientid_busy
;
2036 /* rfc5661 18.50.3 */
2037 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2038 status
= nfserr_clientid_busy
;
2044 status
= nfserr_stale_clientid
;
2050 nfs4_unlock_state();
2051 dprintk("%s return %d\n", __func__
, ntohl(status
));
2056 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2060 if (rc
->rca_one_fs
) {
2061 if (!cstate
->current_fh
.fh_dentry
)
2062 return nfserr_nofilehandle
;
2064 * We don't take advantage of the rca_one_fs case.
2065 * That's OK, it's optional, we can safely ignore it.
2071 status
= nfserr_complete_already
;
2072 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2073 &cstate
->session
->se_client
->cl_flags
))
2076 status
= nfserr_stale_clientid
;
2077 if (is_client_expired(cstate
->session
->se_client
))
2079 * The following error isn't really legal.
2080 * But we only get here if the client just explicitly
2081 * destroyed the client. Surely it no longer cares what
2082 * error it gets back on an operation for the dead
2088 nfsd4_client_record_create(cstate
->session
->se_client
);
2090 nfs4_unlock_state();
2095 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2096 struct nfsd4_setclientid
*setclid
)
2098 struct xdr_netobj clname
= setclid
->se_name
;
2099 nfs4_verifier clverifier
= setclid
->se_verf
;
2100 unsigned int strhashval
;
2101 struct nfs4_client
*conf
, *unconf
, *new;
2103 char dname
[HEXDIR_LEN
];
2105 status
= nfs4_make_rec_clidname(dname
, &clname
);
2110 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2111 * We get here on a DRC miss.
2114 strhashval
= clientstr_hashval(dname
);
2117 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2119 /* RFC 3530 14.2.33 CASE 0: */
2120 status
= nfserr_clid_inuse
;
2121 if (clp_used_exchangeid(conf
))
2123 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2124 char addr_str
[INET6_ADDRSTRLEN
];
2125 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2127 dprintk("NFSD: setclientid: string in use by client "
2128 "at %s\n", addr_str
);
2133 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
2134 * has a description of SETCLIENTID request processing consisting
2135 * of 5 bullet points, labeled as CASE0 - CASE4 below.
2137 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2138 status
= nfserr_jukebox
;
2141 * RFC 3530 14.2.33 CASE 4:
2142 * placed first, because it is the normal case
2145 expire_client(unconf
);
2146 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2150 } else if (same_verf(&conf
->cl_verifier
, &clverifier
)) {
2152 * RFC 3530 14.2.33 CASE 1:
2153 * probable callback update
2156 /* Note this is removing unconfirmed {*x***},
2157 * which is stronger than RFC recommended {vxc**}.
2158 * This has the advantage that there is at most
2159 * one {*x***} in either list at any time.
2161 expire_client(unconf
);
2163 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2166 copy_clid(new, conf
);
2167 } else if (!unconf
) {
2169 * RFC 3530 14.2.33 CASE 2:
2170 * probable client reboot; state will be removed if
2173 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2179 * RFC 3530 14.2.33 CASE 3:
2180 * probable client reboot; state will be removed if
2183 expire_client(unconf
);
2184 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2190 * XXX: we should probably set this at creation time, and check
2191 * for consistent minorversion use throughout:
2193 new->cl_minorversion
= 0;
2194 gen_callback(new, setclid
, rqstp
);
2195 add_to_unconfirmed(new, strhashval
);
2196 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2197 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2198 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2201 nfs4_unlock_state();
2207 * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
2208 * a description of SETCLIENTID_CONFIRM request processing consisting of 4
2209 * bullets, labeled as CASE1 - CASE4 below.
2212 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2213 struct nfsd4_compound_state
*cstate
,
2214 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2216 struct sockaddr
*sa
= svc_addr(rqstp
);
2217 struct nfs4_client
*conf
, *unconf
;
2218 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2219 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2222 if (STALE_CLIENTID(clid
))
2223 return nfserr_stale_clientid
;
2225 * XXX The Duplicate Request Cache (DRC) has been checked (??)
2226 * We get here on a DRC miss.
2231 conf
= find_confirmed_client(clid
);
2232 unconf
= find_unconfirmed_client(clid
);
2234 status
= nfserr_clid_inuse
;
2235 if (conf
&& !rpc_cmp_addr((struct sockaddr
*) &conf
->cl_addr
, sa
))
2237 if (unconf
&& !rpc_cmp_addr((struct sockaddr
*) &unconf
->cl_addr
, sa
))
2241 * section 14.2.34 of RFC 3530 has a description of
2242 * SETCLIENTID_CONFIRM request processing consisting
2243 * of 4 bullet points, labeled as CASE1 - CASE4 below.
2245 if (conf
&& unconf
&& same_verf(&confirm
, &unconf
->cl_confirm
)) {
2247 * RFC 3530 14.2.34 CASE 1:
2250 if (!same_creds(&conf
->cl_cred
, &unconf
->cl_cred
))
2251 status
= nfserr_clid_inuse
;
2253 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2254 nfsd4_probe_callback(conf
);
2255 expire_client(unconf
);
2259 } else if (conf
&& !unconf
) {
2261 * RFC 3530 14.2.34 CASE 2:
2262 * probable retransmitted request; play it safe and
2265 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2266 status
= nfserr_clid_inuse
;
2269 } else if (!conf
&& unconf
2270 && same_verf(&unconf
->cl_confirm
, &confirm
)) {
2272 * RFC 3530 14.2.34 CASE 3:
2273 * Normal case; new or rebooted client:
2275 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
)) {
2276 status
= nfserr_clid_inuse
;
2279 clientstr_hashval(unconf
->cl_recdir
);
2280 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
,
2283 nfsd4_client_record_remove(conf
);
2284 expire_client(conf
);
2286 move_to_confirmed(unconf
);
2288 nfsd4_probe_callback(conf
);
2291 } else if ((!conf
|| (conf
&& !same_verf(&conf
->cl_confirm
, &confirm
)))
2292 && (!unconf
|| (unconf
&& !same_verf(&unconf
->cl_confirm
,
2295 * RFC 3530 14.2.34 CASE 4:
2296 * Client probably hasn't noticed that we rebooted yet.
2298 status
= nfserr_stale_clientid
;
2300 /* check that we have hit one of the cases...*/
2301 status
= nfserr_clid_inuse
;
2304 nfs4_unlock_state();
2308 static struct nfs4_file
*nfsd4_alloc_file(void)
2310 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2313 /* OPEN Share state helper functions */
2314 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2316 unsigned int hashval
= file_hashval(ino
);
2318 atomic_set(&fp
->fi_ref
, 1);
2319 INIT_LIST_HEAD(&fp
->fi_hash
);
2320 INIT_LIST_HEAD(&fp
->fi_stateids
);
2321 INIT_LIST_HEAD(&fp
->fi_delegations
);
2322 fp
->fi_inode
= igrab(ino
);
2323 fp
->fi_had_conflict
= false;
2324 fp
->fi_lease
= NULL
;
2325 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2326 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2327 spin_lock(&recall_lock
);
2328 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2329 spin_unlock(&recall_lock
);
2333 nfsd4_free_slab(struct kmem_cache
**slab
)
2337 kmem_cache_destroy(*slab
);
2342 nfsd4_free_slabs(void)
2344 nfsd4_free_slab(&openowner_slab
);
2345 nfsd4_free_slab(&lockowner_slab
);
2346 nfsd4_free_slab(&file_slab
);
2347 nfsd4_free_slab(&stateid_slab
);
2348 nfsd4_free_slab(&deleg_slab
);
2352 nfsd4_init_slabs(void)
2354 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2355 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2356 if (openowner_slab
== NULL
)
2358 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2359 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2360 if (lockowner_slab
== NULL
)
2362 file_slab
= kmem_cache_create("nfsd4_files",
2363 sizeof(struct nfs4_file
), 0, 0, NULL
);
2364 if (file_slab
== NULL
)
2366 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2367 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2368 if (stateid_slab
== NULL
)
2370 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2371 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2372 if (deleg_slab
== NULL
)
2377 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2381 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2383 kfree(oo
->oo_owner
.so_owner
.data
);
2384 kmem_cache_free(openowner_slab
, oo
);
2387 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2389 kfree(lo
->lo_owner
.so_owner
.data
);
2390 kmem_cache_free(lockowner_slab
, lo
);
2393 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2395 rp
->rp_status
= nfserr_serverfault
;
2397 rp
->rp_buf
= rp
->rp_ibuf
;
2400 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2402 struct nfs4_stateowner
*sop
;
2404 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2408 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2409 if (!sop
->so_owner
.data
) {
2410 kmem_cache_free(slab
, sop
);
2413 sop
->so_owner
.len
= owner
->len
;
2415 INIT_LIST_HEAD(&sop
->so_stateids
);
2416 sop
->so_client
= clp
;
2417 init_nfs4_replay(&sop
->so_replay
);
2421 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2423 list_add(&oo
->oo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2424 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2427 static struct nfs4_openowner
*
2428 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2429 struct nfs4_openowner
*oo
;
2431 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2434 oo
->oo_owner
.so_is_open_owner
= 1;
2435 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2436 oo
->oo_flags
= NFS4_OO_NEW
;
2438 oo
->oo_last_closed_stid
= NULL
;
2439 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2440 hash_openowner(oo
, clp
, strhashval
);
2444 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2445 struct nfs4_openowner
*oo
= open
->op_openowner
;
2446 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2448 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2449 INIT_LIST_HEAD(&stp
->st_lockowners
);
2450 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2451 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2452 stp
->st_stateowner
= &oo
->oo_owner
;
2455 stp
->st_access_bmap
= 0;
2456 stp
->st_deny_bmap
= 0;
2457 __set_bit(open
->op_share_access
, &stp
->st_access_bmap
);
2458 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2459 stp
->st_openstp
= NULL
;
2463 move_to_close_lru(struct nfs4_openowner
*oo
)
2465 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2467 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2468 oo
->oo_time
= get_seconds();
2472 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2475 return (sop
->so_owner
.len
== owner
->len
) &&
2476 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2477 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2480 static struct nfs4_openowner
*
2481 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
)
2483 struct nfs4_stateowner
*so
;
2484 struct nfs4_openowner
*oo
;
2486 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2487 if (!so
->so_is_open_owner
)
2489 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2491 renew_client(oo
->oo_owner
.so_client
);
2498 /* search file_hashtbl[] for file */
2499 static struct nfs4_file
*
2500 find_file(struct inode
*ino
)
2502 unsigned int hashval
= file_hashval(ino
);
2503 struct nfs4_file
*fp
;
2505 spin_lock(&recall_lock
);
2506 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2507 if (fp
->fi_inode
== ino
) {
2509 spin_unlock(&recall_lock
);
2513 spin_unlock(&recall_lock
);
2518 * Called to check deny when READ with all zero stateid or
2519 * WRITE with all zero or all one stateid
2522 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2524 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2525 struct nfs4_file
*fp
;
2526 struct nfs4_ol_stateid
*stp
;
2529 dprintk("NFSD: nfs4_share_conflict\n");
2531 fp
= find_file(ino
);
2534 ret
= nfserr_locked
;
2535 /* Search for conflicting share reservations */
2536 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2537 if (test_bit(deny_type
, &stp
->st_deny_bmap
) ||
2538 test_bit(NFS4_SHARE_DENY_BOTH
, &stp
->st_deny_bmap
))
2547 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2549 /* We're assuming the state code never drops its reference
2550 * without first removing the lease. Since we're in this lease
2551 * callback (and since the lease code is serialized by the kernel
2552 * lock) we know the server hasn't removed the lease yet, we know
2553 * it's safe to take a reference: */
2554 atomic_inc(&dp
->dl_count
);
2556 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2558 /* only place dl_time is set. protected by lock_flocks*/
2559 dp
->dl_time
= get_seconds();
2561 nfsd4_cb_recall(dp
);
2564 /* Called from break_lease() with lock_flocks() held. */
2565 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2567 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2568 struct nfs4_delegation
*dp
;
2571 /* We assume break_lease is only called once per lease: */
2572 BUG_ON(fp
->fi_had_conflict
);
2574 * We don't want the locks code to timeout the lease for us;
2575 * we'll remove it ourself if a delegation isn't returned
2578 fl
->fl_break_time
= 0;
2580 spin_lock(&recall_lock
);
2581 fp
->fi_had_conflict
= true;
2582 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2583 nfsd_break_one_deleg(dp
);
2584 spin_unlock(&recall_lock
);
2588 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2591 return lease_modify(onlist
, arg
);
2596 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2597 .lm_break
= nfsd_break_deleg_cb
,
2598 .lm_change
= nfsd_change_deleg_cb
,
2601 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2603 if (nfsd4_has_session(cstate
))
2605 if (seqid
== so
->so_seqid
- 1)
2606 return nfserr_replay_me
;
2607 if (seqid
== so
->so_seqid
)
2609 return nfserr_bad_seqid
;
2613 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2614 struct nfsd4_open
*open
)
2616 clientid_t
*clientid
= &open
->op_clientid
;
2617 struct nfs4_client
*clp
= NULL
;
2618 unsigned int strhashval
;
2619 struct nfs4_openowner
*oo
= NULL
;
2622 if (STALE_CLIENTID(&open
->op_clientid
))
2623 return nfserr_stale_clientid
;
2625 * In case we need it later, after we've already created the
2626 * file and don't want to risk a further failure:
2628 open
->op_file
= nfsd4_alloc_file();
2629 if (open
->op_file
== NULL
)
2630 return nfserr_jukebox
;
2632 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2633 oo
= find_openstateowner_str(strhashval
, open
);
2634 open
->op_openowner
= oo
;
2636 clp
= find_confirmed_client(clientid
);
2638 return nfserr_expired
;
2641 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2642 /* Replace unconfirmed owners without checking for replay. */
2643 clp
= oo
->oo_owner
.so_client
;
2644 release_openowner(oo
);
2645 open
->op_openowner
= NULL
;
2648 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2651 clp
= oo
->oo_owner
.so_client
;
2654 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2656 return nfserr_jukebox
;
2657 open
->op_openowner
= oo
;
2659 open
->op_stp
= nfs4_alloc_stateid(clp
);
2661 return nfserr_jukebox
;
2665 static inline __be32
2666 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2668 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2669 return nfserr_openmode
;
2674 static int share_access_to_flags(u32 share_access
)
2676 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2679 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2681 struct nfs4_stid
*ret
;
2683 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2686 return delegstateid(ret
);
2689 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2691 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2692 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2696 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2697 struct nfs4_delegation
**dp
)
2700 __be32 status
= nfserr_bad_stateid
;
2702 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2705 flags
= share_access_to_flags(open
->op_share_access
);
2706 status
= nfs4_check_delegmode(*dp
, flags
);
2710 if (!nfsd4_is_deleg_cur(open
))
2714 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2719 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2721 struct nfs4_ol_stateid
*local
;
2722 struct nfs4_openowner
*oo
= open
->op_openowner
;
2724 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2725 /* ignore lock owners */
2726 if (local
->st_stateowner
->so_is_open_owner
== 0)
2728 /* remember if we have seen this open owner */
2729 if (local
->st_stateowner
== &oo
->oo_owner
)
2731 /* check for conflicting share reservations */
2732 if (!test_share(local
, open
))
2733 return nfserr_share_denied
;
2738 static void nfs4_free_stateid(struct nfs4_ol_stateid
*s
)
2740 kmem_cache_free(stateid_slab
, s
);
2743 static inline int nfs4_access_to_access(u32 nfs4_access
)
2747 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2748 flags
|= NFSD_MAY_READ
;
2749 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2750 flags
|= NFSD_MAY_WRITE
;
2754 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2755 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2758 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2759 int access
= nfs4_access_to_access(open
->op_share_access
);
2761 if (!fp
->fi_fds
[oflag
]) {
2762 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2763 &fp
->fi_fds
[oflag
]);
2767 nfs4_file_get_access(fp
, oflag
);
2772 static inline __be32
2773 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2774 struct nfsd4_open
*open
)
2776 struct iattr iattr
= {
2777 .ia_valid
= ATTR_SIZE
,
2780 if (!open
->op_truncate
)
2782 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2783 return nfserr_inval
;
2784 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2788 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
)
2790 u32 op_share_access
= open
->op_share_access
;
2794 new_access
= !test_bit(op_share_access
, &stp
->st_access_bmap
);
2796 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2800 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2803 int oflag
= nfs4_access_to_omode(op_share_access
);
2804 nfs4_file_put_access(fp
, oflag
);
2808 /* remember the open */
2809 __set_bit(op_share_access
, &stp
->st_access_bmap
);
2810 __set_bit(open
->op_share_deny
, &stp
->st_deny_bmap
);
2817 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2819 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2822 /* Should we give out recallable state?: */
2823 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2825 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2828 * In the sessions case, since we don't have to establish a
2829 * separate connection for callbacks, we assume it's OK
2830 * until we hear otherwise:
2832 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2835 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2837 struct file_lock
*fl
;
2839 fl
= locks_alloc_lock();
2842 locks_init_lock(fl
);
2843 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2844 fl
->fl_flags
= FL_LEASE
;
2845 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2846 fl
->fl_end
= OFFSET_MAX
;
2847 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2848 fl
->fl_pid
= current
->tgid
;
2852 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2854 struct nfs4_file
*fp
= dp
->dl_file
;
2855 struct file_lock
*fl
;
2858 fl
= nfs4_alloc_init_lease(dp
, flag
);
2861 fl
->fl_file
= find_readable_file(fp
);
2862 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2863 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2865 list_del_init(&dp
->dl_perclnt
);
2866 locks_free_lock(fl
);
2870 fp
->fi_deleg_file
= fl
->fl_file
;
2871 get_file(fp
->fi_deleg_file
);
2872 atomic_set(&fp
->fi_delegees
, 1);
2873 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2877 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2879 struct nfs4_file
*fp
= dp
->dl_file
;
2882 return nfs4_setlease(dp
, flag
);
2883 spin_lock(&recall_lock
);
2884 if (fp
->fi_had_conflict
) {
2885 spin_unlock(&recall_lock
);
2888 atomic_inc(&fp
->fi_delegees
);
2889 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2890 spin_unlock(&recall_lock
);
2891 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2895 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2897 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2898 if (status
== -EAGAIN
)
2899 open
->op_why_no_deleg
= WND4_CONTENTION
;
2901 open
->op_why_no_deleg
= WND4_RESOURCE
;
2902 switch (open
->op_deleg_want
) {
2903 case NFS4_SHARE_WANT_READ_DELEG
:
2904 case NFS4_SHARE_WANT_WRITE_DELEG
:
2905 case NFS4_SHARE_WANT_ANY_DELEG
:
2907 case NFS4_SHARE_WANT_CANCEL
:
2908 open
->op_why_no_deleg
= WND4_CANCELLED
;
2910 case NFS4_SHARE_WANT_NO_DELEG
:
2911 BUG(); /* not supposed to get here */
2917 * Attempt to hand out a delegation.
2920 nfs4_open_delegation(struct svc_fh
*fh
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2922 struct nfs4_delegation
*dp
;
2923 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2925 int status
= 0, flag
= 0;
2927 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2928 flag
= NFS4_OPEN_DELEGATE_NONE
;
2929 open
->op_recall
= 0;
2930 switch (open
->op_claim_type
) {
2931 case NFS4_OPEN_CLAIM_PREVIOUS
:
2933 open
->op_recall
= 1;
2934 flag
= open
->op_delegate_type
;
2935 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2938 case NFS4_OPEN_CLAIM_NULL
:
2939 /* Let's not give out any delegations till everyone's
2940 * had the chance to reclaim theirs.... */
2941 if (locks_in_grace())
2943 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2945 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2946 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2948 flag
= NFS4_OPEN_DELEGATE_READ
;
2954 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2957 status
= nfs4_set_delegation(dp
, flag
);
2961 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2963 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2964 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2966 open
->op_delegate_type
= flag
;
2967 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2968 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2969 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2970 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2972 /* 4.1 client asking for a delegation? */
2973 if (open
->op_deleg_want
)
2974 nfsd4_open_deleg_none_ext(open
, status
);
2978 nfs4_put_delegation(dp
);
2980 flag
= NFS4_OPEN_DELEGATE_NONE
;
2984 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2985 struct nfs4_delegation
*dp
)
2987 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
2988 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2989 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2990 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
2991 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
2992 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2993 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2994 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
2996 /* Otherwise the client must be confused wanting a delegation
2997 * it already has, therefore we don't return
2998 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3003 * called with nfs4_lock_state() held.
3006 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3008 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3009 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3010 struct nfs4_file
*fp
= NULL
;
3011 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3012 struct nfs4_ol_stateid
*stp
= NULL
;
3013 struct nfs4_delegation
*dp
= NULL
;
3017 * Lookup file; if found, lookup stateid and check open request,
3018 * and check for delegations in the process of being recalled.
3019 * If not found, create the nfs4_file struct
3021 fp
= find_file(ino
);
3023 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3025 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3029 status
= nfserr_bad_stateid
;
3030 if (nfsd4_is_deleg_cur(open
))
3032 status
= nfserr_jukebox
;
3034 open
->op_file
= NULL
;
3035 nfsd4_init_file(fp
, ino
);
3039 * OPEN the file, or upgrade an existing OPEN.
3040 * If truncate fails, the OPEN fails.
3043 /* Stateid was found, this is an OPEN upgrade */
3044 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3048 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3052 open
->op_stp
= NULL
;
3053 init_open_stateid(stp
, fp
, open
);
3054 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3056 release_open_stateid(stp
);
3060 update_stateid(&stp
->st_stid
.sc_stateid
);
3061 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3063 if (nfsd4_has_session(&resp
->cstate
)) {
3064 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3066 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3067 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3068 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3074 * Attempt to hand out a delegation. No error return, because the
3075 * OPEN succeeds even if we fail.
3077 nfs4_open_delegation(current_fh
, open
, stp
);
3081 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3082 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3084 /* 4.1 client trying to upgrade/downgrade delegation? */
3085 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3086 open
->op_deleg_want
)
3087 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3091 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3092 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3094 * To finish the open response, we just need to set the rflags.
3096 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3097 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3098 !nfsd4_has_session(&resp
->cstate
))
3099 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3104 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3106 if (open
->op_openowner
) {
3107 struct nfs4_openowner
*oo
= open
->op_openowner
;
3109 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3110 list_del_init(&oo
->oo_close_lru
);
3111 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3113 release_openowner(oo
);
3114 open
->op_openowner
= NULL
;
3116 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3120 nfsd4_free_file(open
->op_file
);
3122 nfs4_free_stateid(open
->op_stp
);
3126 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3129 struct nfs4_client
*clp
;
3133 dprintk("process_renew(%08x/%08x): starting\n",
3134 clid
->cl_boot
, clid
->cl_id
);
3135 status
= nfserr_stale_clientid
;
3136 if (STALE_CLIENTID(clid
))
3138 clp
= find_confirmed_client(clid
);
3139 status
= nfserr_expired
;
3141 /* We assume the client took too long to RENEW. */
3142 dprintk("nfsd4_renew: clientid not found!\n");
3145 status
= nfserr_cb_path_down
;
3146 if (!list_empty(&clp
->cl_delegations
)
3147 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3151 nfs4_unlock_state();
3155 static struct lock_manager nfsd4_manager
= {
3159 nfsd4_end_grace(void)
3161 dprintk("NFSD: end of grace period\n");
3162 nfsd4_record_grace_done(&init_net
, boot_time
);
3163 locks_end_grace(&nfsd4_manager
);
3165 * Now that every NFSv4 client has had the chance to recover and
3166 * to see the (possibly new, possibly shorter) lease time, we
3167 * can safely set the next grace time to the current lease time:
3169 nfsd4_grace
= nfsd4_lease
;
3173 nfs4_laundromat(void)
3175 struct nfs4_client
*clp
;
3176 struct nfs4_openowner
*oo
;
3177 struct nfs4_delegation
*dp
;
3178 struct list_head
*pos
, *next
, reaplist
;
3179 time_t cutoff
= get_seconds() - nfsd4_lease
;
3180 time_t t
, clientid_val
= nfsd4_lease
;
3181 time_t u
, test_val
= nfsd4_lease
;
3185 dprintk("NFSD: laundromat service - starting\n");
3186 if (locks_in_grace())
3188 INIT_LIST_HEAD(&reaplist
);
3189 spin_lock(&client_lock
);
3190 list_for_each_safe(pos
, next
, &client_lru
) {
3191 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3192 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3193 t
= clp
->cl_time
- cutoff
;
3194 if (clientid_val
> t
)
3198 if (atomic_read(&clp
->cl_refcount
)) {
3199 dprintk("NFSD: client in use (clientid %08x)\n",
3200 clp
->cl_clientid
.cl_id
);
3203 unhash_client_locked(clp
);
3204 list_add(&clp
->cl_lru
, &reaplist
);
3206 spin_unlock(&client_lock
);
3207 list_for_each_safe(pos
, next
, &reaplist
) {
3208 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3209 dprintk("NFSD: purging unused client (clientid %08x)\n",
3210 clp
->cl_clientid
.cl_id
);
3211 nfsd4_client_record_remove(clp
);
3214 spin_lock(&recall_lock
);
3215 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3216 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3217 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3218 u
= dp
->dl_time
- cutoff
;
3223 list_move(&dp
->dl_recall_lru
, &reaplist
);
3225 spin_unlock(&recall_lock
);
3226 list_for_each_safe(pos
, next
, &reaplist
) {
3227 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3228 unhash_delegation(dp
);
3230 test_val
= nfsd4_lease
;
3231 list_for_each_safe(pos
, next
, &close_lru
) {
3232 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3233 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3234 u
= oo
->oo_time
- cutoff
;
3239 release_openowner(oo
);
3241 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3242 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3243 nfs4_unlock_state();
3244 return clientid_val
;
3247 static struct workqueue_struct
*laundry_wq
;
3248 static void laundromat_main(struct work_struct
*);
3249 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3252 laundromat_main(struct work_struct
*not_used
)
3256 t
= nfs4_laundromat();
3257 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3258 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3261 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3263 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3264 return nfserr_bad_stateid
;
3269 STALE_STATEID(stateid_t
*stateid
)
3271 if (stateid
->si_opaque
.so_clid
.cl_boot
== boot_time
)
3273 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3274 STATEID_VAL(stateid
));
3279 access_permit_read(unsigned long access_bmap
)
3281 return test_bit(NFS4_SHARE_ACCESS_READ
, &access_bmap
) ||
3282 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
) ||
3283 test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
);
3287 access_permit_write(unsigned long access_bmap
)
3289 return test_bit(NFS4_SHARE_ACCESS_WRITE
, &access_bmap
) ||
3290 test_bit(NFS4_SHARE_ACCESS_BOTH
, &access_bmap
);
3294 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3296 __be32 status
= nfserr_openmode
;
3298 /* For lock stateid's, we test the parent open, not the lock: */
3299 if (stp
->st_openstp
)
3300 stp
= stp
->st_openstp
;
3301 if ((flags
& WR_STATE
) && (!access_permit_write(stp
->st_access_bmap
)))
3303 if ((flags
& RD_STATE
) && (!access_permit_read(stp
->st_access_bmap
)))
3310 static inline __be32
3311 check_special_stateids(svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3313 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3315 else if (locks_in_grace()) {
3316 /* Answer in remaining cases depends on existence of
3317 * conflicting state; so we must wait out the grace period. */
3318 return nfserr_grace
;
3319 } else if (flags
& WR_STATE
)
3320 return nfs4_share_conflict(current_fh
,
3321 NFS4_SHARE_DENY_WRITE
);
3322 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3323 return nfs4_share_conflict(current_fh
,
3324 NFS4_SHARE_DENY_READ
);
3328 * Allow READ/WRITE during grace period on recovered state only for files
3329 * that are not able to provide mandatory locking.
3332 grace_disallows_io(struct inode
*inode
)
3334 return locks_in_grace() && mandatory_lock(inode
);
3337 /* Returns true iff a is later than b: */
3338 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3340 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3343 static int check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3346 * When sessions are used the stateid generation number is ignored
3349 if (has_session
&& in
->si_generation
== 0)
3352 if (in
->si_generation
== ref
->si_generation
)
3355 /* If the client sends us a stateid from the future, it's buggy: */
3356 if (stateid_generation_after(in
, ref
))
3357 return nfserr_bad_stateid
;
3359 * However, we could see a stateid from the past, even from a
3360 * non-buggy client. For example, if the client sends a lock
3361 * while some IO is outstanding, the lock may bump si_generation
3362 * while the IO is still in flight. The client could avoid that
3363 * situation by waiting for responses on all the IO requests,
3364 * but better performance may result in retrying IO that
3365 * receives an old_stateid error if requests are rarely
3366 * reordered in flight:
3368 return nfserr_old_stateid
;
3371 __be32
nfs4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3373 struct nfs4_stid
*s
;
3374 struct nfs4_ol_stateid
*ols
;
3377 if (STALE_STATEID(stateid
))
3378 return nfserr_stale_stateid
;
3380 s
= find_stateid(cl
, stateid
);
3382 return nfserr_stale_stateid
;
3383 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3386 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3388 ols
= openlockstateid(s
);
3389 if (ols
->st_stateowner
->so_is_open_owner
3390 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3391 return nfserr_bad_stateid
;
3395 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
)
3397 struct nfs4_client
*cl
;
3399 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3400 return nfserr_bad_stateid
;
3401 if (STALE_STATEID(stateid
))
3402 return nfserr_stale_stateid
;
3403 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
);
3405 return nfserr_expired
;
3406 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3408 return nfserr_bad_stateid
;
3414 * Checks for stateid operations
3417 nfs4_preprocess_stateid_op(struct nfsd4_compound_state
*cstate
,
3418 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3420 struct nfs4_stid
*s
;
3421 struct nfs4_ol_stateid
*stp
= NULL
;
3422 struct nfs4_delegation
*dp
= NULL
;
3423 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3424 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3430 if (grace_disallows_io(ino
))
3431 return nfserr_grace
;
3433 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3434 return check_special_stateids(current_fh
, stateid
, flags
);
3436 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
);
3439 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3442 switch (s
->sc_type
) {
3443 case NFS4_DELEG_STID
:
3444 dp
= delegstateid(s
);
3445 status
= nfs4_check_delegmode(dp
, flags
);
3449 *filpp
= dp
->dl_file
->fi_deleg_file
;
3453 case NFS4_OPEN_STID
:
3454 case NFS4_LOCK_STID
:
3455 stp
= openlockstateid(s
);
3456 status
= nfs4_check_fh(current_fh
, stp
);
3459 if (stp
->st_stateowner
->so_is_open_owner
3460 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3462 status
= nfs4_check_openmode(stp
, flags
);
3466 if (flags
& RD_STATE
)
3467 *filpp
= find_readable_file(stp
->st_file
);
3469 *filpp
= find_writeable_file(stp
->st_file
);
3473 return nfserr_bad_stateid
;
3481 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3483 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3484 return nfserr_locks_held
;
3485 release_lock_stateid(stp
);
3490 * Test if the stateid is valid
3493 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3494 struct nfsd4_test_stateid
*test_stateid
)
3496 struct nfsd4_test_stateid_id
*stateid
;
3497 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3500 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3501 stateid
->ts_id_status
= nfs4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3502 nfs4_unlock_state();
3508 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3509 struct nfsd4_free_stateid
*free_stateid
)
3511 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3512 struct nfs4_stid
*s
;
3513 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3514 __be32 ret
= nfserr_bad_stateid
;
3517 s
= find_stateid(cl
, stateid
);
3520 switch (s
->sc_type
) {
3521 case NFS4_DELEG_STID
:
3522 ret
= nfserr_locks_held
;
3524 case NFS4_OPEN_STID
:
3525 case NFS4_LOCK_STID
:
3526 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3529 if (s
->sc_type
== NFS4_LOCK_STID
)
3530 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3532 ret
= nfserr_locks_held
;
3535 ret
= nfserr_bad_stateid
;
3538 nfs4_unlock_state();
3545 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3546 RD_STATE
: WR_STATE
;
3549 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3551 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3552 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3555 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3558 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3560 * "Closed" stateid's exist *only* to return
3561 * nfserr_replay_me from the previous step.
3563 return nfserr_bad_stateid
;
3564 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3567 return nfs4_check_fh(current_fh
, stp
);
3571 * Checks for sequence id mutating operations.
3574 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3575 stateid_t
*stateid
, char typemask
,
3576 struct nfs4_ol_stateid
**stpp
)
3579 struct nfs4_stid
*s
;
3581 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3582 seqid
, STATEID_VAL(stateid
));
3585 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
);
3588 *stpp
= openlockstateid(s
);
3589 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3591 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3594 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3597 struct nfs4_openowner
*oo
;
3599 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3600 NFS4_OPEN_STID
, stpp
);
3603 oo
= openowner((*stpp
)->st_stateowner
);
3604 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3605 return nfserr_bad_stateid
;
3610 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3611 struct nfsd4_open_confirm
*oc
)
3614 struct nfs4_openowner
*oo
;
3615 struct nfs4_ol_stateid
*stp
;
3617 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3618 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3619 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3621 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3627 status
= nfs4_preprocess_seqid_op(cstate
,
3628 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3629 NFS4_OPEN_STID
, &stp
);
3632 oo
= openowner(stp
->st_stateowner
);
3633 status
= nfserr_bad_stateid
;
3634 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3636 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3637 update_stateid(&stp
->st_stid
.sc_stateid
);
3638 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3639 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3640 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3642 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3645 if (!cstate
->replay_owner
)
3646 nfs4_unlock_state();
3650 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3652 if (!test_bit(access
, &stp
->st_access_bmap
))
3654 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3655 __clear_bit(access
, &stp
->st_access_bmap
);
3658 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3660 switch (to_access
) {
3661 case NFS4_SHARE_ACCESS_READ
:
3662 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3663 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3665 case NFS4_SHARE_ACCESS_WRITE
:
3666 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3667 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3669 case NFS4_SHARE_ACCESS_BOTH
:
3677 reset_union_bmap_deny(unsigned long deny
, unsigned long *bmap
)
3680 for (i
= 0; i
< 4; i
++) {
3681 if ((i
& deny
) != i
)
3682 __clear_bit(i
, bmap
);
3687 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3688 struct nfsd4_compound_state
*cstate
,
3689 struct nfsd4_open_downgrade
*od
)
3692 struct nfs4_ol_stateid
*stp
;
3694 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3695 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3696 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3698 /* We don't yet support WANT bits: */
3699 if (od
->od_deleg_want
)
3700 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3704 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3705 &od
->od_stateid
, &stp
);
3708 status
= nfserr_inval
;
3709 if (!test_bit(od
->od_share_access
, &stp
->st_access_bmap
)) {
3710 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
3711 stp
->st_access_bmap
, od
->od_share_access
);
3714 if (!test_bit(od
->od_share_deny
, &stp
->st_deny_bmap
)) {
3715 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3716 stp
->st_deny_bmap
, od
->od_share_deny
);
3719 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3721 reset_union_bmap_deny(od
->od_share_deny
, &stp
->st_deny_bmap
);
3723 update_stateid(&stp
->st_stid
.sc_stateid
);
3724 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3727 if (!cstate
->replay_owner
)
3728 nfs4_unlock_state();
3732 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3734 struct nfs4_openowner
*oo
;
3735 struct nfs4_ol_stateid
*s
;
3737 if (!so
->so_is_open_owner
)
3740 s
= oo
->oo_last_closed_stid
;
3743 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3744 /* Release the last_closed_stid on the next seqid bump: */
3745 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3748 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3749 release_last_closed_stateid(oo
);
3752 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3754 unhash_open_stateid(s
);
3755 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3759 * nfs4_unlock_state() called after encode
3762 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3763 struct nfsd4_close
*close
)
3766 struct nfs4_openowner
*oo
;
3767 struct nfs4_ol_stateid
*stp
;
3769 dprintk("NFSD: nfsd4_close on file %.*s\n",
3770 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3771 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3774 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3776 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3780 oo
= openowner(stp
->st_stateowner
);
3782 update_stateid(&stp
->st_stid
.sc_stateid
);
3783 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3785 nfsd4_close_open_stateid(stp
);
3786 oo
->oo_last_closed_stid
= stp
;
3788 /* place unused nfs4_stateowners on so_close_lru list to be
3789 * released by the laundromat service after the lease period
3790 * to enable us to handle CLOSE replay
3792 if (list_empty(&oo
->oo_owner
.so_stateids
))
3793 move_to_close_lru(oo
);
3795 if (!cstate
->replay_owner
)
3796 nfs4_unlock_state();
3801 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3802 struct nfsd4_delegreturn
*dr
)
3804 struct nfs4_delegation
*dp
;
3805 stateid_t
*stateid
= &dr
->dr_stateid
;
3806 struct nfs4_stid
*s
;
3807 struct inode
*inode
;
3810 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3812 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3815 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
);
3818 dp
= delegstateid(s
);
3819 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3823 unhash_delegation(dp
);
3825 nfs4_unlock_state();
3831 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3833 #define LOCKOWNER_INO_HASH_BITS 8
3834 #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
3835 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3838 end_offset(u64 start
, u64 len
)
3843 return end
>= start
? end
: NFS4_MAX_UINT64
;
3846 /* last octet in a range */
3848 last_byte_offset(u64 start
, u64 len
)
3854 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3857 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3859 return (file_hashval(inode
) + cl_id
3860 + opaque_hashval(ownername
->data
, ownername
->len
))
3861 & LOCKOWNER_INO_HASH_MASK
;
3864 static struct list_head lockowner_ino_hashtbl
[LOCKOWNER_INO_HASH_SIZE
];
3867 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3868 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3869 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3870 * locking, this prevents us from being completely protocol-compliant. The
3871 * real solution to this problem is to start using unsigned file offsets in
3872 * the VFS, but this is a very deep change!
3875 nfs4_transform_lock_offset(struct file_lock
*lock
)
3877 if (lock
->fl_start
< 0)
3878 lock
->fl_start
= OFFSET_MAX
;
3879 if (lock
->fl_end
< 0)
3880 lock
->fl_end
= OFFSET_MAX
;
3883 /* Hack!: For now, we're defining this just so we can use a pointer to it
3884 * as a unique cookie to identify our (NFSv4's) posix locks. */
3885 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3889 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3891 struct nfs4_lockowner
*lo
;
3893 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3894 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3895 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3896 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3897 if (!deny
->ld_owner
.data
)
3898 /* We just don't care that much */
3900 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3901 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3904 deny
->ld_owner
.len
= 0;
3905 deny
->ld_owner
.data
= NULL
;
3906 deny
->ld_clientid
.cl_boot
= 0;
3907 deny
->ld_clientid
.cl_id
= 0;
3909 deny
->ld_start
= fl
->fl_start
;
3910 deny
->ld_length
= NFS4_MAX_UINT64
;
3911 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3912 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3913 deny
->ld_type
= NFS4_READ_LT
;
3914 if (fl
->fl_type
!= F_RDLCK
)
3915 deny
->ld_type
= NFS4_WRITE_LT
;
3918 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3920 struct nfs4_ol_stateid
*lst
;
3922 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3924 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3925 struct nfs4_ol_stateid
, st_perstateowner
);
3926 return lst
->st_file
->fi_inode
== inode
;
3929 static struct nfs4_lockowner
*
3930 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3931 struct xdr_netobj
*owner
)
3933 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3934 struct nfs4_lockowner
*lo
;
3936 list_for_each_entry(lo
, &lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3937 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3943 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3945 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3946 unsigned int inohash
= lockowner_ino_hashval(inode
,
3947 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3949 list_add(&lo
->lo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
3950 list_add(&lo
->lo_owner_ino_hash
, &lockowner_ino_hashtbl
[inohash
]);
3951 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3955 * Alloc a lock owner structure.
3956 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3959 * strhashval = ownerstr_hashval
3962 static struct nfs4_lockowner
*
3963 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3964 struct nfs4_lockowner
*lo
;
3966 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3969 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3970 lo
->lo_owner
.so_is_open_owner
= 0;
3971 /* It is the openowner seqid that will be incremented in encode in the
3972 * case of new lockowners; so increment the lock seqid manually: */
3973 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3974 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3978 static struct nfs4_ol_stateid
*
3979 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3981 struct nfs4_ol_stateid
*stp
;
3982 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3984 stp
= nfs4_alloc_stateid(clp
);
3987 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3988 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3989 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3990 stp
->st_stateowner
= &lo
->lo_owner
;
3993 stp
->st_access_bmap
= 0;
3994 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3995 stp
->st_openstp
= open_stp
;
4000 check_lock_length(u64 offset
, u64 length
)
4002 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4003 LOFF_OVERFLOW(offset
, length
)));
4006 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4008 struct nfs4_file
*fp
= lock_stp
->st_file
;
4009 int oflag
= nfs4_access_to_omode(access
);
4011 if (test_bit(access
, &lock_stp
->st_access_bmap
))
4013 nfs4_file_get_access(fp
, oflag
);
4014 __set_bit(access
, &lock_stp
->st_access_bmap
);
4017 __be32
lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
, struct nfs4_ol_stateid
*ost
, struct nfsd4_lock
*lock
, struct nfs4_ol_stateid
**lst
, bool *new)
4019 struct nfs4_file
*fi
= ost
->st_file
;
4020 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4021 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4022 struct nfs4_lockowner
*lo
;
4023 unsigned int strhashval
;
4025 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
, &lock
->v
.new.owner
);
4027 if (!cstate
->minorversion
)
4028 return nfserr_bad_seqid
;
4029 /* XXX: a lockowner always has exactly one stateid: */
4030 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4031 struct nfs4_ol_stateid
, st_perstateowner
);
4034 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4035 &lock
->v
.new.owner
);
4036 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4038 return nfserr_jukebox
;
4039 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4041 release_lockowner(lo
);
4042 return nfserr_jukebox
;
4052 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4053 struct nfsd4_lock
*lock
)
4055 struct nfs4_openowner
*open_sop
= NULL
;
4056 struct nfs4_lockowner
*lock_sop
= NULL
;
4057 struct nfs4_ol_stateid
*lock_stp
;
4058 struct nfs4_file
*fp
;
4059 struct file
*filp
= NULL
;
4060 struct file_lock file_lock
;
4061 struct file_lock conflock
;
4063 bool new_state
= false;
4067 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4068 (long long) lock
->lk_offset
,
4069 (long long) lock
->lk_length
);
4071 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4072 return nfserr_inval
;
4074 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4075 S_IFREG
, NFSD_MAY_LOCK
))) {
4076 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4082 if (lock
->lk_is_new
) {
4084 * Client indicates that this is a new lockowner.
4085 * Use open owner and open stateid to create lock owner and
4088 struct nfs4_ol_stateid
*open_stp
= NULL
;
4090 if (nfsd4_has_session(cstate
))
4091 /* See rfc 5661 18.10.3: given clientid is ignored: */
4092 memcpy(&lock
->v
.new.clientid
,
4093 &cstate
->session
->se_client
->cl_clientid
,
4094 sizeof(clientid_t
));
4096 status
= nfserr_stale_clientid
;
4097 if (STALE_CLIENTID(&lock
->lk_new_clientid
))
4100 /* validate and update open stateid and open seqid */
4101 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4102 lock
->lk_new_open_seqid
,
4103 &lock
->lk_new_open_stateid
,
4107 open_sop
= openowner(open_stp
->st_stateowner
);
4108 status
= nfserr_bad_stateid
;
4109 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4110 &lock
->v
.new.clientid
))
4112 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4113 &lock_stp
, &new_state
);
4117 /* lock (lock owner + lock stateid) already exists */
4118 status
= nfs4_preprocess_seqid_op(cstate
,
4119 lock
->lk_old_lock_seqid
,
4120 &lock
->lk_old_lock_stateid
,
4121 NFS4_LOCK_STID
, &lock_stp
);
4125 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4126 fp
= lock_stp
->st_file
;
4128 lkflg
= setlkflg(lock
->lk_type
);
4129 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4133 status
= nfserr_grace
;
4134 if (locks_in_grace() && !lock
->lk_reclaim
)
4136 status
= nfserr_no_grace
;
4137 if (!locks_in_grace() && lock
->lk_reclaim
)
4140 locks_init_lock(&file_lock
);
4141 switch (lock
->lk_type
) {
4144 filp
= find_readable_file(lock_stp
->st_file
);
4146 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4147 file_lock
.fl_type
= F_RDLCK
;
4150 case NFS4_WRITEW_LT
:
4151 filp
= find_writeable_file(lock_stp
->st_file
);
4153 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4154 file_lock
.fl_type
= F_WRLCK
;
4157 status
= nfserr_inval
;
4161 status
= nfserr_openmode
;
4164 file_lock
.fl_owner
= (fl_owner_t
)lock_sop
;
4165 file_lock
.fl_pid
= current
->tgid
;
4166 file_lock
.fl_file
= filp
;
4167 file_lock
.fl_flags
= FL_POSIX
;
4168 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4170 file_lock
.fl_start
= lock
->lk_offset
;
4171 file_lock
.fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4172 nfs4_transform_lock_offset(&file_lock
);
4175 * Try to lock the file in the VFS.
4176 * Note: locks.c uses the BKL to protect the inode's lock list.
4179 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, &conflock
);
4181 case 0: /* success! */
4182 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4183 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4187 case (EAGAIN
): /* conflock holds conflicting lock */
4188 status
= nfserr_denied
;
4189 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4190 nfs4_set_lock_denied(&conflock
, &lock
->lk_denied
);
4193 status
= nfserr_deadlock
;
4196 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4197 status
= nfserrno(err
);
4201 if (status
&& new_state
)
4202 release_lockowner(lock_sop
);
4203 if (!cstate
->replay_owner
)
4204 nfs4_unlock_state();
4209 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4210 * so we do a temporary open here just to get an open file to pass to
4211 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4214 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4217 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4219 err
= nfserrno(vfs_test_lock(file
, lock
));
4229 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4230 struct nfsd4_lockt
*lockt
)
4232 struct inode
*inode
;
4233 struct file_lock file_lock
;
4234 struct nfs4_lockowner
*lo
;
4237 if (locks_in_grace())
4238 return nfserr_grace
;
4240 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4241 return nfserr_inval
;
4245 status
= nfserr_stale_clientid
;
4246 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
))
4249 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4252 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4253 locks_init_lock(&file_lock
);
4254 switch (lockt
->lt_type
) {
4257 file_lock
.fl_type
= F_RDLCK
;
4260 case NFS4_WRITEW_LT
:
4261 file_lock
.fl_type
= F_WRLCK
;
4264 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4265 status
= nfserr_inval
;
4269 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4271 file_lock
.fl_owner
= (fl_owner_t
)lo
;
4272 file_lock
.fl_pid
= current
->tgid
;
4273 file_lock
.fl_flags
= FL_POSIX
;
4275 file_lock
.fl_start
= lockt
->lt_offset
;
4276 file_lock
.fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4278 nfs4_transform_lock_offset(&file_lock
);
4280 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, &file_lock
);
4284 if (file_lock
.fl_type
!= F_UNLCK
) {
4285 status
= nfserr_denied
;
4286 nfs4_set_lock_denied(&file_lock
, &lockt
->lt_denied
);
4289 nfs4_unlock_state();
4294 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4295 struct nfsd4_locku
*locku
)
4297 struct nfs4_ol_stateid
*stp
;
4298 struct file
*filp
= NULL
;
4299 struct file_lock file_lock
;
4303 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4304 (long long) locku
->lu_offset
,
4305 (long long) locku
->lu_length
);
4307 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4308 return nfserr_inval
;
4312 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4313 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4316 filp
= find_any_file(stp
->st_file
);
4318 status
= nfserr_lock_range
;
4322 locks_init_lock(&file_lock
);
4323 file_lock
.fl_type
= F_UNLCK
;
4324 file_lock
.fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4325 file_lock
.fl_pid
= current
->tgid
;
4326 file_lock
.fl_file
= filp
;
4327 file_lock
.fl_flags
= FL_POSIX
;
4328 file_lock
.fl_lmops
= &nfsd_posix_mng_ops
;
4329 file_lock
.fl_start
= locku
->lu_offset
;
4331 file_lock
.fl_end
= last_byte_offset(locku
->lu_offset
, locku
->lu_length
);
4332 nfs4_transform_lock_offset(&file_lock
);
4335 * Try to unlock the file in the VFS.
4337 err
= vfs_lock_file(filp
, F_SETLK
, &file_lock
, NULL
);
4339 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4343 * OK, unlock succeeded; the only thing left to do is update the stateid.
4345 update_stateid(&stp
->st_stid
.sc_stateid
);
4346 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4349 if (!cstate
->replay_owner
)
4350 nfs4_unlock_state();
4354 status
= nfserrno(err
);
4360 * 1: locks held by lockowner
4361 * 0: no locks held by lockowner
4364 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4366 struct file_lock
**flpp
;
4367 struct inode
*inode
= filp
->fi_inode
;
4371 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4372 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4383 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4384 struct nfsd4_compound_state
*cstate
,
4385 struct nfsd4_release_lockowner
*rlockowner
)
4387 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4388 struct nfs4_stateowner
*sop
;
4389 struct nfs4_lockowner
*lo
;
4390 struct nfs4_ol_stateid
*stp
;
4391 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4392 struct list_head matches
;
4393 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4396 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4397 clid
->cl_boot
, clid
->cl_id
);
4399 /* XXX check for lease expiration */
4401 status
= nfserr_stale_clientid
;
4402 if (STALE_CLIENTID(clid
))
4407 status
= nfserr_locks_held
;
4408 INIT_LIST_HEAD(&matches
);
4410 list_for_each_entry(sop
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
4411 if (sop
->so_is_open_owner
)
4413 if (!same_owner_str(sop
, owner
, clid
))
4415 list_for_each_entry(stp
, &sop
->so_stateids
,
4417 lo
= lockowner(sop
);
4418 if (check_for_locks(stp
->st_file
, lo
))
4420 list_add(&lo
->lo_list
, &matches
);
4423 /* Clients probably won't expect us to return with some (but not all)
4424 * of the lockowner state released; so don't release any until all
4425 * have been checked. */
4427 while (!list_empty(&matches
)) {
4428 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4430 /* unhash_stateowner deletes so_perclient only
4431 * for openowners. */
4432 list_del(&lo
->lo_list
);
4433 release_lockowner(lo
);
4436 nfs4_unlock_state();
4440 static inline struct nfs4_client_reclaim
*
4443 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4447 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4449 unsigned int strhashval
= clientstr_hashval(name
);
4450 struct nfs4_client
*clp
;
4452 clp
= find_confirmed_client_by_str(name
, strhashval
);
4455 return test_bit(NFSD4_CLIENT_STABLE
, &clp
->cl_flags
);
4459 * failure => all reset bets are off, nfserr_no_grace...
4462 nfs4_client_to_reclaim(const char *name
)
4464 unsigned int strhashval
;
4465 struct nfs4_client_reclaim
*crp
= NULL
;
4467 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4468 crp
= alloc_reclaim();
4471 strhashval
= clientstr_hashval(name
);
4472 INIT_LIST_HEAD(&crp
->cr_strhash
);
4473 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4474 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4475 reclaim_str_hashtbl_size
++;
4480 nfs4_release_reclaim(void)
4482 struct nfs4_client_reclaim
*crp
= NULL
;
4485 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4486 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4487 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4488 struct nfs4_client_reclaim
, cr_strhash
);
4489 list_del(&crp
->cr_strhash
);
4491 reclaim_str_hashtbl_size
--;
4494 BUG_ON(reclaim_str_hashtbl_size
);
4498 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4499 struct nfs4_client_reclaim
*
4500 nfsd4_find_reclaim_client(struct nfs4_client
*clp
)
4502 unsigned int strhashval
;
4503 struct nfs4_client_reclaim
*crp
= NULL
;
4505 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4506 clp
->cl_name
.len
, clp
->cl_name
.data
,
4509 /* find clp->cl_name in reclaim_str_hashtbl */
4510 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4511 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4512 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4520 * Called from OPEN. Look for clientid in reclaim list.
4523 nfs4_check_open_reclaim(clientid_t
*clid
)
4525 struct nfs4_client
*clp
;
4527 /* find clientid in conf_id_hashtbl */
4528 clp
= find_confirmed_client(clid
);
4530 return nfserr_reclaim_bad
;
4532 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4535 #ifdef CONFIG_NFSD_FAULT_INJECTION
4537 void nfsd_forget_clients(u64 num
)
4539 struct nfs4_client
*clp
, *next
;
4543 list_for_each_entry_safe(clp
, next
, &client_lru
, cl_lru
) {
4544 nfsd4_client_record_remove(clp
);
4549 nfs4_unlock_state();
4551 printk(KERN_INFO
"NFSD: Forgot %d clients", count
);
4554 static void release_lockowner_sop(struct nfs4_stateowner
*sop
)
4556 release_lockowner(lockowner(sop
));
4559 static void release_openowner_sop(struct nfs4_stateowner
*sop
)
4561 release_openowner(openowner(sop
));
4564 static int nfsd_release_n_owners(u64 num
, bool is_open_owner
,
4565 void (*release_sop
)(struct nfs4_stateowner
*))
4568 struct nfs4_stateowner
*sop
, *next
;
4570 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4571 list_for_each_entry_safe(sop
, next
, &ownerstr_hashtbl
[i
], so_strhash
) {
4572 if (sop
->so_is_open_owner
!= is_open_owner
)
4582 void nfsd_forget_locks(u64 num
)
4587 count
= nfsd_release_n_owners(num
, false, release_lockowner_sop
);
4588 nfs4_unlock_state();
4590 printk(KERN_INFO
"NFSD: Forgot %d locks", count
);
4593 void nfsd_forget_openowners(u64 num
)
4598 count
= nfsd_release_n_owners(num
, true, release_openowner_sop
);
4599 nfs4_unlock_state();
4601 printk(KERN_INFO
"NFSD: Forgot %d open owners", count
);
4604 int nfsd_process_n_delegations(u64 num
, void (*deleg_func
)(struct nfs4_delegation
*))
4607 struct nfs4_file
*fp
, *fnext
;
4608 struct nfs4_delegation
*dp
, *dnext
;
4610 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4611 list_for_each_entry_safe(fp
, fnext
, &file_hashtbl
[i
], fi_hash
) {
4612 list_for_each_entry_safe(dp
, dnext
, &fp
->fi_delegations
, dl_perfile
) {
4623 void nfsd_forget_delegations(u64 num
)
4628 count
= nfsd_process_n_delegations(num
, unhash_delegation
);
4629 nfs4_unlock_state();
4631 printk(KERN_INFO
"NFSD: Forgot %d delegations", count
);
4634 void nfsd_recall_delegations(u64 num
)
4639 spin_lock(&recall_lock
);
4640 count
= nfsd_process_n_delegations(num
, nfsd_break_one_deleg
);
4641 spin_unlock(&recall_lock
);
4642 nfs4_unlock_state();
4644 printk(KERN_INFO
"NFSD: Recalled %d delegations", count
);
4647 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4649 /* initialization to perform at module load time: */
4652 nfs4_state_init(void)
4656 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4657 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4658 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4659 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4660 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4661 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4663 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4664 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4665 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4666 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4668 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4669 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4671 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4672 INIT_LIST_HEAD(&lockowner_ino_hashtbl
[i
]);
4673 INIT_LIST_HEAD(&close_lru
);
4674 INIT_LIST_HEAD(&client_lru
);
4675 INIT_LIST_HEAD(&del_recall_lru
);
4676 reclaim_str_hashtbl_size
= 0;
4680 * Since the lifetime of a delegation isn't limited to that of an open, a
4681 * client may quite reasonably hang on to a delegation as long as it has
4682 * the inode cached. This becomes an obvious problem the first time a
4683 * client's inode cache approaches the size of the server's total memory.
4685 * For now we avoid this problem by imposing a hard limit on the number
4686 * of delegations, which varies according to the server's memory size.
4689 set_max_delegations(void)
4692 * Allow at most 4 delegations per megabyte of RAM. Quick
4693 * estimates suggest that in the worst case (where every delegation
4694 * is for a different inode), a delegation could take about 1.5K,
4695 * giving a worst case usage of about 6% of memory.
4697 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4700 /* initialization to perform when the nfsd service is started: */
4703 nfs4_state_start(void)
4708 * FIXME: For now, we hang most of the pernet global stuff off of
4709 * init_net until nfsd is fully containerized. Eventually, we'll
4710 * need to pass a net pointer into this function, take a reference
4711 * to that instead and then do most of the rest of this on a per-net
4715 nfsd4_client_tracking_init(&init_net
);
4716 boot_time
= get_seconds();
4717 locks_start_grace(&nfsd4_manager
);
4718 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4720 ret
= set_callback_cred();
4725 laundry_wq
= create_singlethread_workqueue("nfsd4");
4726 if (laundry_wq
== NULL
) {
4730 ret
= nfsd4_create_callback_queue();
4732 goto out_free_laundry
;
4733 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4734 set_max_delegations();
4737 destroy_workqueue(laundry_wq
);
4739 nfsd4_client_tracking_exit(&init_net
);
4745 __nfs4_state_shutdown(void)
4748 struct nfs4_client
*clp
= NULL
;
4749 struct nfs4_delegation
*dp
= NULL
;
4750 struct list_head
*pos
, *next
, reaplist
;
4752 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4753 while (!list_empty(&conf_id_hashtbl
[i
])) {
4754 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4757 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4758 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4762 INIT_LIST_HEAD(&reaplist
);
4763 spin_lock(&recall_lock
);
4764 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4765 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4766 list_move(&dp
->dl_recall_lru
, &reaplist
);
4768 spin_unlock(&recall_lock
);
4769 list_for_each_safe(pos
, next
, &reaplist
) {
4770 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4771 unhash_delegation(dp
);
4774 nfsd4_client_tracking_exit(&init_net
);
4779 nfs4_state_shutdown(void)
4781 cancel_delayed_work_sync(&laundromat_work
);
4782 destroy_workqueue(laundry_wq
);
4783 locks_end_grace(&nfsd4_manager
);
4785 __nfs4_state_shutdown();
4786 nfs4_unlock_state();
4787 nfsd4_destroy_callback_queue();
4791 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4793 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4794 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4798 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4800 if (cstate
->minorversion
) {
4801 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4802 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4807 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
4809 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4813 * functions to set current state id
4816 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4818 put_stateid(cstate
, &odp
->od_stateid
);
4822 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
4824 put_stateid(cstate
, &open
->op_stateid
);
4828 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4830 put_stateid(cstate
, &close
->cl_stateid
);
4834 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
4836 put_stateid(cstate
, &lock
->lk_resp_stateid
);
4840 * functions to consume current state id
4844 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4846 get_stateid(cstate
, &odp
->od_stateid
);
4850 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
4852 get_stateid(cstate
, &drp
->dr_stateid
);
4856 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
4858 get_stateid(cstate
, &fsp
->fr_stateid
);
4862 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
4864 get_stateid(cstate
, &setattr
->sa_stateid
);
4868 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4870 get_stateid(cstate
, &close
->cl_stateid
);
4874 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
4876 get_stateid(cstate
, &locku
->lu_stateid
);
4880 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
4882 get_stateid(cstate
, &read
->rd_stateid
);
4886 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
4888 get_stateid(cstate
, &write
->wr_stateid
);