2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <kandros@umich.edu>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/swap.h>
40 #include <linux/pagemap.h>
41 #include <linux/ratelimit.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/clnt.h>
46 #include "current_stateid.h"
47 #include "fault_inject.h"
51 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 time_t nfsd4_lease
= 90; /* default lease time */
55 time_t nfsd4_grace
= 90;
57 #define all_ones {{~0,~0},~0}
58 static const stateid_t one_stateid
= {
60 .si_opaque
= all_ones
,
62 static const stateid_t zero_stateid
= {
65 static const stateid_t currentstateid
= {
69 static u64 current_sessionid
= 1;
71 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
72 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
73 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
75 /* forward declarations */
76 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
80 /* Currently used for almost all code touching nfsv4 state: */
81 static DEFINE_MUTEX(client_mutex
);
84 * Currently used for the del_recall_lru and file hash table. In an
85 * effort to decrease the scope of the client_mutex, this spinlock may
86 * eventually cover more:
88 static DEFINE_SPINLOCK(recall_lock
);
90 static struct kmem_cache
*openowner_slab
= NULL
;
91 static struct kmem_cache
*lockowner_slab
= NULL
;
92 static struct kmem_cache
*file_slab
= NULL
;
93 static struct kmem_cache
*stateid_slab
= NULL
;
94 static struct kmem_cache
*deleg_slab
= NULL
;
99 mutex_lock(&client_mutex
);
102 static void free_session(struct kref
*);
104 /* Must be called under the client_lock */
105 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
107 kref_put(&ses
->se_ref
, free_session
);
110 static void nfsd4_get_session(struct nfsd4_session
*ses
)
112 kref_get(&ses
->se_ref
);
116 nfs4_unlock_state(void)
118 mutex_unlock(&client_mutex
);
122 opaque_hashval(const void *ptr
, int nbytes
)
124 unsigned char *cptr
= (unsigned char *) ptr
;
134 static struct list_head del_recall_lru
;
136 static void nfsd4_free_file(struct nfs4_file
*f
)
138 kmem_cache_free(file_slab
, f
);
142 put_nfs4_file(struct nfs4_file
*fi
)
144 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
145 list_del(&fi
->fi_hash
);
146 spin_unlock(&recall_lock
);
153 get_nfs4_file(struct nfs4_file
*fi
)
155 atomic_inc(&fi
->fi_ref
);
158 static int num_delegations
;
159 unsigned int max_delegations
;
162 * Open owner state (share locks)
165 /* hash tables for lock and open owners */
166 #define OWNER_HASH_BITS 8
167 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
168 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
170 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
174 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
176 return ret
& OWNER_HASH_MASK
;
179 static struct list_head ownerstr_hashtbl
[OWNER_HASH_SIZE
];
181 /* hash table for nfs4_file */
182 #define FILE_HASH_BITS 8
183 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
185 static unsigned int file_hashval(struct inode
*ino
)
187 /* XXX: why are we hashing on inode pointer, anyway? */
188 return hash_ptr(ino
, FILE_HASH_BITS
);
191 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
193 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
195 BUG_ON(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
196 atomic_inc(&fp
->fi_access
[oflag
]);
199 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
201 if (oflag
== O_RDWR
) {
202 __nfs4_file_get_access(fp
, O_RDONLY
);
203 __nfs4_file_get_access(fp
, O_WRONLY
);
205 __nfs4_file_get_access(fp
, oflag
);
208 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
210 if (fp
->fi_fds
[oflag
]) {
211 fput(fp
->fi_fds
[oflag
]);
212 fp
->fi_fds
[oflag
] = NULL
;
216 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
218 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
219 nfs4_file_put_fd(fp
, oflag
);
221 * It's also safe to get rid of the RDWR open *if*
222 * we no longer have need of the other kind of access
223 * or if we already have the other kind of open:
225 if (fp
->fi_fds
[1-oflag
]
226 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
227 nfs4_file_put_fd(fp
, O_RDWR
);
231 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
233 if (oflag
== O_RDWR
) {
234 __nfs4_file_put_access(fp
, O_RDONLY
);
235 __nfs4_file_put_access(fp
, O_WRONLY
);
237 __nfs4_file_put_access(fp
, oflag
);
240 static inline int get_new_stid(struct nfs4_stid
*stid
)
242 static int min_stateid
= 0;
243 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
247 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
249 * Note: the necessary preallocation was done in
250 * nfs4_alloc_stateid(). The idr code caps the number of
251 * preallocations that can exist at a time, but the state lock
252 * prevents anyone from using ours before we get here:
256 * It shouldn't be a problem to reuse an opaque stateid value.
257 * I don't think it is for 4.1. But with 4.0 I worry that, for
258 * example, a stray write retransmission could be accepted by
259 * the server when it should have been rejected. Therefore,
260 * adopt a trick from the sctp code to attempt to maximize the
261 * amount of time until an id is reused, by ensuring they always
262 * "increase" (mod INT_MAX):
265 min_stateid
= new_stid
+1;
266 if (min_stateid
== INT_MAX
)
271 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
273 stateid_t
*s
= &stid
->sc_stateid
;
276 stid
->sc_type
= type
;
277 stid
->sc_client
= cl
;
278 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
279 new_id
= get_new_stid(stid
);
280 s
->si_opaque
.so_id
= (u32
)new_id
;
281 /* Will be incremented before return to client: */
282 s
->si_generation
= 0;
285 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
287 struct idr
*stateids
= &cl
->cl_stateids
;
289 if (!idr_pre_get(stateids
, GFP_KERNEL
))
292 * Note: if we fail here (or any time between now and the time
293 * we actually get the new idr), we won't need to undo the idr
294 * preallocation, since the idr code caps the number of
295 * preallocated entries.
297 return kmem_cache_alloc(slab
, GFP_KERNEL
);
300 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
302 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
305 static struct nfs4_delegation
*
306 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
308 struct nfs4_delegation
*dp
;
309 struct nfs4_file
*fp
= stp
->st_file
;
311 dprintk("NFSD alloc_init_deleg\n");
313 * Major work on the lease subsystem (for example, to support
314 * calbacks on stat) will be required before we can support
315 * write delegations properly.
317 if (type
!= NFS4_OPEN_DELEGATE_READ
)
319 if (fp
->fi_had_conflict
)
321 if (num_delegations
> max_delegations
)
323 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
326 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
328 * delegation seqid's are never incremented. The 4.1 special
329 * meaning of seqid 0 isn't meaningful, really, but let's avoid
330 * 0 anyway just for consistency and use 1:
332 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
334 INIT_LIST_HEAD(&dp
->dl_perfile
);
335 INIT_LIST_HEAD(&dp
->dl_perclnt
);
336 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
340 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
342 atomic_set(&dp
->dl_count
, 1);
343 INIT_WORK(&dp
->dl_recall
.cb_work
, nfsd4_do_callback_rpc
);
348 nfs4_put_delegation(struct nfs4_delegation
*dp
)
350 if (atomic_dec_and_test(&dp
->dl_count
)) {
351 dprintk("NFSD: freeing dp %p\n",dp
);
352 put_nfs4_file(dp
->dl_file
);
353 kmem_cache_free(deleg_slab
, dp
);
358 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
360 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
361 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
363 fput(fp
->fi_deleg_file
);
364 fp
->fi_deleg_file
= NULL
;
368 static void unhash_stid(struct nfs4_stid
*s
)
370 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
372 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
375 /* Called under the state lock. */
377 unhash_delegation(struct nfs4_delegation
*dp
)
379 unhash_stid(&dp
->dl_stid
);
380 list_del_init(&dp
->dl_perclnt
);
381 spin_lock(&recall_lock
);
382 list_del_init(&dp
->dl_perfile
);
383 list_del_init(&dp
->dl_recall_lru
);
384 spin_unlock(&recall_lock
);
385 nfs4_put_deleg_lease(dp
->dl_file
);
386 nfs4_put_delegation(dp
);
393 /* client_lock protects the client lru list and session hash table */
394 static DEFINE_SPINLOCK(client_lock
);
396 /* Hash tables for nfs4_clientid state */
397 #define CLIENT_HASH_BITS 4
398 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
399 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
401 static unsigned int clientid_hashval(u32 id
)
403 return id
& CLIENT_HASH_MASK
;
406 static unsigned int clientstr_hashval(const char *name
)
408 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
412 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
413 * used in reboot/reset lease grace period processing
415 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
416 * setclientid_confirmed info.
418 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
421 * client_lru holds client queue ordered by nfs4_client.cl_time
424 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
425 * for last close replay.
427 static struct list_head reclaim_str_hashtbl
[CLIENT_HASH_SIZE
];
428 static int reclaim_str_hashtbl_size
= 0;
429 static struct list_head conf_id_hashtbl
[CLIENT_HASH_SIZE
];
430 static struct list_head conf_str_hashtbl
[CLIENT_HASH_SIZE
];
431 static struct list_head unconf_str_hashtbl
[CLIENT_HASH_SIZE
];
432 static struct list_head unconf_id_hashtbl
[CLIENT_HASH_SIZE
];
433 static struct list_head client_lru
;
434 static struct list_head close_lru
;
437 * We store the NONE, READ, WRITE, and BOTH bits separately in the
438 * st_{access,deny}_bmap field of the stateid, in order to track not
439 * only what share bits are currently in force, but also what
440 * combinations of share bits previous opens have used. This allows us
441 * to enforce the recommendation of rfc 3530 14.2.19 that the server
442 * return an error if the client attempt to downgrade to a combination
443 * of share bits not explicable by closing some of its previous opens.
445 * XXX: This enforcement is actually incomplete, since we don't keep
446 * track of access/deny bit combinations; so, e.g., we allow:
448 * OPEN allow read, deny write
449 * OPEN allow both, deny none
450 * DOWNGRADE allow read, deny none
452 * which we should reject.
455 bmap_to_share_mode(unsigned long bmap
) {
457 unsigned int access
= 0;
459 for (i
= 1; i
< 4; i
++) {
460 if (test_bit(i
, &bmap
))
467 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
468 unsigned int access
, deny
;
470 access
= bmap_to_share_mode(stp
->st_access_bmap
);
471 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
472 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
477 /* set share access for a given stateid */
479 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
481 __set_bit(access
, &stp
->st_access_bmap
);
484 /* clear share access for a given stateid */
486 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
488 __clear_bit(access
, &stp
->st_access_bmap
);
491 /* test whether a given stateid has access */
493 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
495 return test_bit(access
, &stp
->st_access_bmap
);
498 /* set share deny for a given stateid */
500 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
502 __set_bit(access
, &stp
->st_deny_bmap
);
505 /* clear share deny for a given stateid */
507 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
509 __clear_bit(access
, &stp
->st_deny_bmap
);
512 /* test whether a given stateid is denying specific access */
514 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
516 return test_bit(access
, &stp
->st_deny_bmap
);
519 static int nfs4_access_to_omode(u32 access
)
521 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
522 case NFS4_SHARE_ACCESS_READ
:
524 case NFS4_SHARE_ACCESS_WRITE
:
526 case NFS4_SHARE_ACCESS_BOTH
:
532 /* release all access and file references for a given stateid */
534 release_all_access(struct nfs4_ol_stateid
*stp
)
538 for (i
= 1; i
< 4; i
++) {
539 if (test_access(i
, stp
))
540 nfs4_file_put_access(stp
->st_file
,
541 nfs4_access_to_omode(i
));
542 clear_access(i
, stp
);
546 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
548 list_del(&stp
->st_perfile
);
549 list_del(&stp
->st_perstateowner
);
552 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
554 release_all_access(stp
);
555 put_nfs4_file(stp
->st_file
);
559 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
561 kmem_cache_free(stateid_slab
, stp
);
564 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
568 unhash_generic_stateid(stp
);
569 unhash_stid(&stp
->st_stid
);
570 file
= find_any_file(stp
->st_file
);
572 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
573 close_generic_stateid(stp
);
574 free_generic_stateid(stp
);
577 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
579 struct nfs4_ol_stateid
*stp
;
581 list_del(&lo
->lo_owner
.so_strhash
);
582 list_del(&lo
->lo_perstateid
);
583 list_del(&lo
->lo_owner_ino_hash
);
584 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
585 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
586 struct nfs4_ol_stateid
, st_perstateowner
);
587 release_lock_stateid(stp
);
591 static void release_lockowner(struct nfs4_lockowner
*lo
)
593 unhash_lockowner(lo
);
594 nfs4_free_lockowner(lo
);
598 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
600 struct nfs4_lockowner
*lo
;
602 while (!list_empty(&open_stp
->st_lockowners
)) {
603 lo
= list_entry(open_stp
->st_lockowners
.next
,
604 struct nfs4_lockowner
, lo_perstateid
);
605 release_lockowner(lo
);
609 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
611 unhash_generic_stateid(stp
);
612 release_stateid_lockowners(stp
);
613 close_generic_stateid(stp
);
616 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
618 unhash_open_stateid(stp
);
619 unhash_stid(&stp
->st_stid
);
620 free_generic_stateid(stp
);
623 static void unhash_openowner(struct nfs4_openowner
*oo
)
625 struct nfs4_ol_stateid
*stp
;
627 list_del(&oo
->oo_owner
.so_strhash
);
628 list_del(&oo
->oo_perclient
);
629 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
630 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
631 struct nfs4_ol_stateid
, st_perstateowner
);
632 release_open_stateid(stp
);
636 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
638 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
641 unhash_stid(&s
->st_stid
);
642 free_generic_stateid(s
);
643 oo
->oo_last_closed_stid
= NULL
;
647 static void release_openowner(struct nfs4_openowner
*oo
)
649 unhash_openowner(oo
);
650 list_del(&oo
->oo_close_lru
);
651 release_last_closed_stateid(oo
);
652 nfs4_free_openowner(oo
);
655 #define SESSION_HASH_SIZE 512
656 static struct list_head sessionid_hashtbl
[SESSION_HASH_SIZE
];
659 hash_sessionid(struct nfs4_sessionid
*sessionid
)
661 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
663 return sid
->sequence
% SESSION_HASH_SIZE
;
668 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
670 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
671 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
675 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
682 gen_sessionid(struct nfsd4_session
*ses
)
684 struct nfs4_client
*clp
= ses
->se_client
;
685 struct nfsd4_sessionid
*sid
;
687 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
688 sid
->clientid
= clp
->cl_clientid
;
689 sid
->sequence
= current_sessionid
++;
694 * The protocol defines ca_maxresponssize_cached to include the size of
695 * the rpc header, but all we need to cache is the data starting after
696 * the end of the initial SEQUENCE operation--the rest we regenerate
697 * each time. Therefore we can advertise a ca_maxresponssize_cached
698 * value that is the number of bytes in our cache plus a few additional
699 * bytes. In order to stay on the safe side, and not promise more than
700 * we can cache, those additional bytes must be the minimum possible: 24
701 * bytes of rpc header (xid through accept state, with AUTH_NULL
702 * verifier), 12 for the compound header (with zero-length tag), and 44
703 * for the SEQUENCE op response:
705 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
708 free_session_slots(struct nfsd4_session
*ses
)
712 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
713 kfree(ses
->se_slots
[i
]);
717 * We don't actually need to cache the rpc and session headers, so we
718 * can allocate a little less for each slot:
720 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
722 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
725 static int nfsd4_sanitize_slot_size(u32 size
)
727 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
728 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
734 * XXX: If we run out of reserved DRC memory we could (up to a point)
735 * re-negotiate active sessions and reduce their slot usage to make
736 * room for new connections. For now we just fail the create session.
738 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
742 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
744 spin_lock(&nfsd_drc_lock
);
745 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
746 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
747 num
= min_t(int, num
, avail
/ slotsize
);
748 nfsd_drc_mem_used
+= num
* slotsize
;
749 spin_unlock(&nfsd_drc_lock
);
754 static void nfsd4_put_drc_mem(int slotsize
, int num
)
756 spin_lock(&nfsd_drc_lock
);
757 nfsd_drc_mem_used
-= slotsize
* num
;
758 spin_unlock(&nfsd_drc_lock
);
761 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
763 struct nfsd4_session
*new;
766 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
767 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
768 mem
= numslots
* sizeof(struct nfsd4_slot
*);
770 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
773 /* allocate each struct nfsd4_slot and data cache in one piece */
774 for (i
= 0; i
< numslots
; i
++) {
775 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
776 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
777 if (!new->se_slots
[i
])
783 kfree(new->se_slots
[i
]);
788 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
790 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
792 new->maxreqs
= numslots
;
793 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
794 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
795 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
796 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
797 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
800 static void free_conn(struct nfsd4_conn
*c
)
802 svc_xprt_put(c
->cn_xprt
);
806 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
808 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
809 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
811 spin_lock(&clp
->cl_lock
);
812 if (!list_empty(&c
->cn_persession
)) {
813 list_del(&c
->cn_persession
);
816 spin_unlock(&clp
->cl_lock
);
817 nfsd4_probe_callback(clp
);
820 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
822 struct nfsd4_conn
*conn
;
824 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
827 svc_xprt_get(rqstp
->rq_xprt
);
828 conn
->cn_xprt
= rqstp
->rq_xprt
;
829 conn
->cn_flags
= flags
;
830 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
834 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
836 conn
->cn_session
= ses
;
837 list_add(&conn
->cn_persession
, &ses
->se_conns
);
840 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
842 struct nfs4_client
*clp
= ses
->se_client
;
844 spin_lock(&clp
->cl_lock
);
845 __nfsd4_hash_conn(conn
, ses
);
846 spin_unlock(&clp
->cl_lock
);
849 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
851 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
852 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
855 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
859 nfsd4_hash_conn(conn
, ses
);
860 ret
= nfsd4_register_conn(conn
);
862 /* oops; xprt is already down: */
863 nfsd4_conn_lost(&conn
->cn_xpt_user
);
864 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
865 /* callback channel may be back up */
866 nfsd4_probe_callback(ses
->se_client
);
870 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
872 u32 dir
= NFS4_CDFC4_FORE
;
874 if (cses
->flags
& SESSION4_BACK_CHAN
)
875 dir
|= NFS4_CDFC4_BACK
;
876 return alloc_conn(rqstp
, dir
);
879 /* must be called under client_lock */
880 static void nfsd4_del_conns(struct nfsd4_session
*s
)
882 struct nfs4_client
*clp
= s
->se_client
;
883 struct nfsd4_conn
*c
;
885 spin_lock(&clp
->cl_lock
);
886 while (!list_empty(&s
->se_conns
)) {
887 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
888 list_del_init(&c
->cn_persession
);
889 spin_unlock(&clp
->cl_lock
);
891 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
894 spin_lock(&clp
->cl_lock
);
896 spin_unlock(&clp
->cl_lock
);
899 static void __free_session(struct nfsd4_session
*ses
)
901 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
902 free_session_slots(ses
);
906 static void free_session(struct kref
*kref
)
908 struct nfsd4_session
*ses
;
910 lockdep_assert_held(&client_lock
);
911 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
912 nfsd4_del_conns(ses
);
916 void nfsd4_put_session(struct nfsd4_session
*ses
)
918 spin_lock(&client_lock
);
919 nfsd4_put_session_locked(ses
);
920 spin_unlock(&client_lock
);
923 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
)
925 struct nfsd4_session
*new;
926 int numslots
, slotsize
;
928 * Note decreasing slot size below client's request may
929 * make it difficult for client to function correctly, whereas
930 * decreasing the number of slots will (just?) affect
931 * performance. When short on memory we therefore prefer to
932 * decrease number of slots instead of their size.
934 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
935 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
939 new = __alloc_session(slotsize
, numslots
);
941 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
944 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
948 static struct nfsd4_session
*init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
952 new->se_client
= clp
;
955 INIT_LIST_HEAD(&new->se_conns
);
957 new->se_cb_seq_nr
= 1;
958 new->se_flags
= cses
->flags
;
959 new->se_cb_prog
= cses
->callback_prog
;
960 kref_init(&new->se_ref
);
961 idx
= hash_sessionid(&new->se_sessionid
);
962 spin_lock(&client_lock
);
963 list_add(&new->se_hash
, &sessionid_hashtbl
[idx
]);
964 spin_lock(&clp
->cl_lock
);
965 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
966 spin_unlock(&clp
->cl_lock
);
967 spin_unlock(&client_lock
);
969 if (cses
->flags
& SESSION4_BACK_CHAN
) {
970 struct sockaddr
*sa
= svc_addr(rqstp
);
972 * This is a little silly; with sessions there's no real
973 * use for the callback address. Use the peer address
974 * as a reasonable default for now, but consider fixing
975 * the rpc client not to require an address in the
978 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
979 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
984 /* caller must hold client_lock */
985 static struct nfsd4_session
*
986 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
)
988 struct nfsd4_session
*elem
;
991 dump_sessionid(__func__
, sessionid
);
992 idx
= hash_sessionid(sessionid
);
993 /* Search in the appropriate list */
994 list_for_each_entry(elem
, &sessionid_hashtbl
[idx
], se_hash
) {
995 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
996 NFS4_MAX_SESSIONID_LEN
)) {
1001 dprintk("%s: session not found\n", __func__
);
1005 /* caller must hold client_lock */
1007 unhash_session(struct nfsd4_session
*ses
)
1009 list_del(&ses
->se_hash
);
1010 spin_lock(&ses
->se_client
->cl_lock
);
1011 list_del(&ses
->se_perclnt
);
1012 spin_unlock(&ses
->se_client
->cl_lock
);
1015 /* must be called under the client_lock */
1017 renew_client_locked(struct nfs4_client
*clp
)
1019 if (is_client_expired(clp
)) {
1021 printk("%s: client (clientid %08x/%08x) already expired\n",
1023 clp
->cl_clientid
.cl_boot
,
1024 clp
->cl_clientid
.cl_id
);
1028 dprintk("renewing client (clientid %08x/%08x)\n",
1029 clp
->cl_clientid
.cl_boot
,
1030 clp
->cl_clientid
.cl_id
);
1031 list_move_tail(&clp
->cl_lru
, &client_lru
);
1032 clp
->cl_time
= get_seconds();
1036 renew_client(struct nfs4_client
*clp
)
1038 spin_lock(&client_lock
);
1039 renew_client_locked(clp
);
1040 spin_unlock(&client_lock
);
1043 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1045 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1047 if (clid
->cl_boot
== nn
->boot_time
)
1049 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1050 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1055 * XXX Should we use a slab cache ?
1056 * This type of memory management is somewhat inefficient, but we use it
1057 * anyway since SETCLIENTID is not a common operation.
1059 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1061 struct nfs4_client
*clp
;
1063 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1066 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1067 if (clp
->cl_name
.data
== NULL
) {
1071 clp
->cl_name
.len
= name
.len
;
1076 free_client(struct nfs4_client
*clp
)
1078 lockdep_assert_held(&client_lock
);
1079 while (!list_empty(&clp
->cl_sessions
)) {
1080 struct nfsd4_session
*ses
;
1081 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1083 list_del(&ses
->se_perclnt
);
1084 nfsd4_put_session_locked(ses
);
1086 free_svc_cred(&clp
->cl_cred
);
1087 kfree(clp
->cl_name
.data
);
1092 release_session_client(struct nfsd4_session
*session
)
1094 struct nfs4_client
*clp
= session
->se_client
;
1096 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &client_lock
))
1098 if (is_client_expired(clp
)) {
1100 session
->se_client
= NULL
;
1102 renew_client_locked(clp
);
1103 spin_unlock(&client_lock
);
1106 /* must be called under the client_lock */
1108 unhash_client_locked(struct nfs4_client
*clp
)
1110 struct nfsd4_session
*ses
;
1112 mark_client_expired(clp
);
1113 list_del(&clp
->cl_lru
);
1114 spin_lock(&clp
->cl_lock
);
1115 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1116 list_del_init(&ses
->se_hash
);
1117 spin_unlock(&clp
->cl_lock
);
1121 destroy_client(struct nfs4_client
*clp
)
1123 struct nfs4_openowner
*oo
;
1124 struct nfs4_delegation
*dp
;
1125 struct list_head reaplist
;
1127 INIT_LIST_HEAD(&reaplist
);
1128 spin_lock(&recall_lock
);
1129 while (!list_empty(&clp
->cl_delegations
)) {
1130 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1131 list_del_init(&dp
->dl_perclnt
);
1132 list_move(&dp
->dl_recall_lru
, &reaplist
);
1134 spin_unlock(&recall_lock
);
1135 while (!list_empty(&reaplist
)) {
1136 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1137 unhash_delegation(dp
);
1139 while (!list_empty(&clp
->cl_openowners
)) {
1140 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1141 release_openowner(oo
);
1143 nfsd4_shutdown_callback(clp
);
1144 if (clp
->cl_cb_conn
.cb_xprt
)
1145 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1146 list_del(&clp
->cl_idhash
);
1147 list_del(&clp
->cl_strhash
);
1148 spin_lock(&client_lock
);
1149 unhash_client_locked(clp
);
1150 if (atomic_read(&clp
->cl_refcount
) == 0)
1152 spin_unlock(&client_lock
);
1155 static void expire_client(struct nfs4_client
*clp
)
1157 nfsd4_client_record_remove(clp
);
1158 destroy_client(clp
);
1161 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1163 memcpy(target
->cl_verifier
.data
, source
->data
,
1164 sizeof(target
->cl_verifier
.data
));
1167 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1169 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1170 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1173 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1175 if (source
->cr_principal
) {
1176 target
->cr_principal
=
1177 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1178 if (target
->cr_principal
== NULL
)
1181 target
->cr_principal
= NULL
;
1182 target
->cr_flavor
= source
->cr_flavor
;
1183 target
->cr_uid
= source
->cr_uid
;
1184 target
->cr_gid
= source
->cr_gid
;
1185 target
->cr_group_info
= source
->cr_group_info
;
1186 get_group_info(target
->cr_group_info
);
1190 static int same_name(const char *n1
, const char *n2
)
1192 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1196 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1198 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1202 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1204 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1207 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1211 if (g1
->ngroups
!= g2
->ngroups
)
1213 for (i
=0; i
<g1
->ngroups
; i
++)
1214 if (GROUP_AT(g1
, i
) != GROUP_AT(g2
, i
))
1220 * RFC 3530 language requires clid_inuse be returned when the
1221 * "principal" associated with a requests differs from that previously
1222 * used. We use uid, gid's, and gss principal string as our best
1223 * approximation. We also don't want to allow non-gss use of a client
1224 * established using gss: in theory cr_principal should catch that
1225 * change, but in practice cr_principal can be null even in the gss case
1226 * since gssd doesn't always pass down a principal string.
1228 static bool is_gss_cred(struct svc_cred
*cr
)
1230 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1231 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1236 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1238 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1239 || (cr1
->cr_uid
!= cr2
->cr_uid
)
1240 || (cr1
->cr_gid
!= cr2
->cr_gid
)
1241 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1243 if (cr1
->cr_principal
== cr2
->cr_principal
)
1245 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1247 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1250 static void gen_clid(struct nfs4_client
*clp
)
1252 static u32 current_clientid
= 1;
1253 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
1255 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1256 clp
->cl_clientid
.cl_id
= current_clientid
++;
1259 static void gen_confirm(struct nfs4_client
*clp
)
1264 verf
[0] = (__be32
)get_seconds();
1265 verf
[1] = (__be32
)i
++;
1266 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1269 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1271 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1274 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1276 struct nfs4_stid
*s
;
1278 s
= find_stateid(cl
, t
);
1281 if (typemask
& s
->sc_type
)
1286 static struct nfs4_client
*create_client(struct xdr_netobj name
, char *recdir
,
1287 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1289 struct nfs4_client
*clp
;
1290 struct sockaddr
*sa
= svc_addr(rqstp
);
1293 clp
= alloc_client(name
);
1297 INIT_LIST_HEAD(&clp
->cl_sessions
);
1298 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1300 spin_lock(&client_lock
);
1302 spin_unlock(&client_lock
);
1305 idr_init(&clp
->cl_stateids
);
1306 memcpy(clp
->cl_recdir
, recdir
, HEXDIR_LEN
);
1307 atomic_set(&clp
->cl_refcount
, 0);
1308 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1309 INIT_LIST_HEAD(&clp
->cl_idhash
);
1310 INIT_LIST_HEAD(&clp
->cl_strhash
);
1311 INIT_LIST_HEAD(&clp
->cl_openowners
);
1312 INIT_LIST_HEAD(&clp
->cl_delegations
);
1313 INIT_LIST_HEAD(&clp
->cl_lru
);
1314 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1315 spin_lock_init(&clp
->cl_lock
);
1316 INIT_WORK(&clp
->cl_cb_null
.cb_work
, nfsd4_do_callback_rpc
);
1317 clp
->cl_time
= get_seconds();
1318 clear_bit(0, &clp
->cl_cb_slot_busy
);
1319 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1320 copy_verf(clp
, verf
);
1321 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1323 clp
->cl_cb_session
= NULL
;
1328 add_to_unconfirmed(struct nfs4_client
*clp
, unsigned int strhashval
)
1330 unsigned int idhashval
;
1332 list_add(&clp
->cl_strhash
, &unconf_str_hashtbl
[strhashval
]);
1333 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1334 list_add(&clp
->cl_idhash
, &unconf_id_hashtbl
[idhashval
]);
1339 move_to_confirmed(struct nfs4_client
*clp
)
1341 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1342 unsigned int strhashval
;
1344 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1345 list_move(&clp
->cl_idhash
, &conf_id_hashtbl
[idhashval
]);
1346 strhashval
= clientstr_hashval(clp
->cl_recdir
);
1347 list_move(&clp
->cl_strhash
, &conf_str_hashtbl
[strhashval
]);
1351 static struct nfs4_client
*
1352 find_confirmed_client(clientid_t
*clid
, bool sessions
)
1354 struct nfs4_client
*clp
;
1355 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1357 list_for_each_entry(clp
, &conf_id_hashtbl
[idhashval
], cl_idhash
) {
1358 if (same_clid(&clp
->cl_clientid
, clid
)) {
1359 if ((bool)clp
->cl_minorversion
!= sessions
)
1368 static struct nfs4_client
*
1369 find_unconfirmed_client(clientid_t
*clid
, bool sessions
)
1371 struct nfs4_client
*clp
;
1372 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1374 list_for_each_entry(clp
, &unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1375 if (same_clid(&clp
->cl_clientid
, clid
)) {
1376 if ((bool)clp
->cl_minorversion
!= sessions
)
1384 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1386 return clp
->cl_exchange_flags
!= 0;
1389 static struct nfs4_client
*
1390 find_confirmed_client_by_str(const char *dname
, unsigned int hashval
)
1392 struct nfs4_client
*clp
;
1394 list_for_each_entry(clp
, &conf_str_hashtbl
[hashval
], cl_strhash
) {
1395 if (same_name(clp
->cl_recdir
, dname
))
1401 static struct nfs4_client
*
1402 find_unconfirmed_client_by_str(const char *dname
, unsigned int hashval
)
1404 struct nfs4_client
*clp
;
1406 list_for_each_entry(clp
, &unconf_str_hashtbl
[hashval
], cl_strhash
) {
1407 if (same_name(clp
->cl_recdir
, dname
))
1414 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1416 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1417 struct sockaddr
*sa
= svc_addr(rqstp
);
1418 u32 scopeid
= rpc_get_scope_id(sa
);
1419 unsigned short expected_family
;
1421 /* Currently, we only support tcp and tcp6 for the callback channel */
1422 if (se
->se_callback_netid_len
== 3 &&
1423 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1424 expected_family
= AF_INET
;
1425 else if (se
->se_callback_netid_len
== 4 &&
1426 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1427 expected_family
= AF_INET6
;
1431 conn
->cb_addrlen
= rpc_uaddr2sockaddr(&init_net
, se
->se_callback_addr_val
,
1432 se
->se_callback_addr_len
,
1433 (struct sockaddr
*)&conn
->cb_addr
,
1434 sizeof(conn
->cb_addr
));
1436 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1439 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1440 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1442 conn
->cb_prog
= se
->se_callback_prog
;
1443 conn
->cb_ident
= se
->se_callback_ident
;
1444 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1447 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1448 conn
->cb_addrlen
= 0;
1449 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1450 "will not receive delegations\n",
1451 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1457 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1460 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1462 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1465 dprintk("--> %s slot %p\n", __func__
, slot
);
1467 slot
->sl_opcnt
= resp
->opcnt
;
1468 slot
->sl_status
= resp
->cstate
.status
;
1470 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1471 if (nfsd4_not_cached(resp
)) {
1472 slot
->sl_datalen
= 0;
1475 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1476 base
= (char *)resp
->cstate
.datap
-
1477 (char *)resp
->xbuf
->head
[0].iov_base
;
1478 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1480 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1485 * Encode the replay sequence operation from the slot values.
1486 * If cachethis is FALSE encode the uncached rep error on the next
1487 * operation which sets resp->p and increments resp->opcnt for
1488 * nfs4svc_encode_compoundres.
1492 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1493 struct nfsd4_compoundres
*resp
)
1495 struct nfsd4_op
*op
;
1496 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1498 /* Encode the replayed sequence operation */
1499 op
= &args
->ops
[resp
->opcnt
- 1];
1500 nfsd4_encode_operation(resp
, op
);
1502 /* Return nfserr_retry_uncached_rep in next operation. */
1503 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1504 op
= &args
->ops
[resp
->opcnt
++];
1505 op
->status
= nfserr_retry_uncached_rep
;
1506 nfsd4_encode_operation(resp
, op
);
1512 * The sequence operation is not cached because we can use the slot and
1516 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1517 struct nfsd4_sequence
*seq
)
1519 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1522 dprintk("--> %s slot %p\n", __func__
, slot
);
1524 /* Either returns 0 or nfserr_retry_uncached */
1525 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1526 if (status
== nfserr_retry_uncached_rep
)
1529 /* The sequence operation has been encoded, cstate->datap set. */
1530 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1532 resp
->opcnt
= slot
->sl_opcnt
;
1533 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1534 status
= slot
->sl_status
;
1540 * Set the exchange_id flags returned by the server.
1543 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1545 /* pNFS is not supported */
1546 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1548 /* Referrals are supported, Migration is not. */
1549 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1551 /* set the wire flags to return to client. */
1552 clid
->flags
= new->cl_exchange_flags
;
1555 static bool client_has_state(struct nfs4_client
*clp
)
1558 * Note clp->cl_openowners check isn't quite right: there's no
1559 * need to count owners without stateid's.
1561 * Also note we should probably be using this in 4.0 case too.
1563 return !list_empty(&clp
->cl_openowners
)
1564 || !list_empty(&clp
->cl_delegations
)
1565 || !list_empty(&clp
->cl_sessions
);
1569 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1570 struct nfsd4_compound_state
*cstate
,
1571 struct nfsd4_exchange_id
*exid
)
1573 struct nfs4_client
*unconf
, *conf
, *new;
1575 unsigned int strhashval
;
1576 char dname
[HEXDIR_LEN
];
1577 char addr_str
[INET6_ADDRSTRLEN
];
1578 nfs4_verifier verf
= exid
->verifier
;
1579 struct sockaddr
*sa
= svc_addr(rqstp
);
1580 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1582 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1583 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1584 "ip_addr=%s flags %x, spa_how %d\n",
1585 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1586 addr_str
, exid
->flags
, exid
->spa_how
);
1588 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1589 return nfserr_inval
;
1591 /* Currently only support SP4_NONE */
1592 switch (exid
->spa_how
) {
1596 return nfserr_serverfault
;
1598 BUG(); /* checked by xdr code */
1600 return nfserr_serverfault
; /* no excuse :-/ */
1603 status
= nfs4_make_rec_clidname(dname
, &exid
->clname
);
1608 strhashval
= clientstr_hashval(dname
);
1610 /* Cases below refer to rfc 5661 section 18.35.4: */
1612 conf
= find_confirmed_client_by_str(dname
, strhashval
);
1614 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1615 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1618 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1619 status
= nfserr_inval
;
1622 if (!creds_match
) { /* case 9 */
1623 status
= nfserr_perm
;
1626 if (!verfs_match
) { /* case 8 */
1627 status
= nfserr_not_same
;
1631 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1635 if (!creds_match
) { /* case 3 */
1636 if (client_has_state(conf
)) {
1637 status
= nfserr_clid_inuse
;
1640 expire_client(conf
);
1643 if (verfs_match
) { /* case 2 */
1644 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1648 /* case 5, client reboot */
1652 if (update
) { /* case 7 */
1653 status
= nfserr_noent
;
1657 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
1658 if (unconf
) /* case 4, possible retry or client restart */
1659 expire_client(unconf
);
1661 /* case 1 (normal case) */
1663 new = create_client(exid
->clname
, dname
, rqstp
, &verf
);
1665 status
= nfserr_jukebox
;
1668 new->cl_minorversion
= 1;
1671 add_to_unconfirmed(new, strhashval
);
1673 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1674 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1676 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1677 nfsd4_set_ex_flags(new, exid
);
1679 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1680 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1684 nfs4_unlock_state();
1689 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1691 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1694 /* The slot is in use, and no response has been sent. */
1696 if (seqid
== slot_seqid
)
1697 return nfserr_jukebox
;
1699 return nfserr_seq_misordered
;
1701 /* Note unsigned 32-bit arithmetic handles wraparound: */
1702 if (likely(seqid
== slot_seqid
+ 1))
1704 if (seqid
== slot_seqid
)
1705 return nfserr_replay_cache
;
1706 return nfserr_seq_misordered
;
1710 * Cache the create session result into the create session single DRC
1711 * slot cache by saving the xdr structure. sl_seqid has been set.
1712 * Do this for solo or embedded create session operations.
1715 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1716 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1718 slot
->sl_status
= nfserr
;
1719 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1723 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1724 struct nfsd4_clid_slot
*slot
)
1726 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1727 return slot
->sl_status
;
1730 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1731 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1732 1 + /* MIN tag is length with zero, only length */ \
1733 3 + /* version, opcount, opcode */ \
1734 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1735 /* seqid, slotID, slotID, cache */ \
1736 4 ) * sizeof(__be32))
1738 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1739 2 + /* verifier: AUTH_NULL, length 0 */\
1741 1 + /* MIN tag is length with zero, only length */ \
1742 3 + /* opcount, opcode, opstatus*/ \
1743 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1744 /* seqid, slotID, slotID, slotID, status */ \
1745 5 ) * sizeof(__be32))
1747 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1749 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1750 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1754 nfsd4_create_session(struct svc_rqst
*rqstp
,
1755 struct nfsd4_compound_state
*cstate
,
1756 struct nfsd4_create_session
*cr_ses
)
1758 struct sockaddr
*sa
= svc_addr(rqstp
);
1759 struct nfs4_client
*conf
, *unconf
;
1760 struct nfsd4_session
*new;
1761 struct nfsd4_conn
*conn
;
1762 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1765 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1766 return nfserr_inval
;
1767 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1768 return nfserr_toosmall
;
1769 new = alloc_session(&cr_ses
->fore_channel
);
1771 return nfserr_jukebox
;
1772 status
= nfserr_jukebox
;
1773 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1775 goto out_free_session
;
1778 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true);
1779 conf
= find_confirmed_client(&cr_ses
->clientid
, true);
1782 cs_slot
= &conf
->cl_cs_slot
;
1783 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1784 if (status
== nfserr_replay_cache
) {
1785 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1787 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1788 status
= nfserr_seq_misordered
;
1791 } else if (unconf
) {
1793 struct nfs4_client
*old
;
1794 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1795 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1796 status
= nfserr_clid_inuse
;
1799 cs_slot
= &unconf
->cl_cs_slot
;
1800 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1802 /* an unconfirmed replay returns misordered */
1803 status
= nfserr_seq_misordered
;
1806 hash
= clientstr_hashval(unconf
->cl_recdir
);
1807 old
= find_confirmed_client_by_str(unconf
->cl_recdir
, hash
);
1810 move_to_confirmed(unconf
);
1813 status
= nfserr_stale_clientid
;
1818 * We do not support RDMA or persistent sessions
1820 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1821 cr_ses
->flags
&= ~SESSION4_RDMA
;
1823 init_session(rqstp
, new, conf
, cr_ses
);
1824 nfsd4_init_conn(rqstp
, conn
, new);
1826 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1827 NFS4_MAX_SESSIONID_LEN
);
1828 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1829 sizeof(struct nfsd4_channel_attrs
));
1830 cs_slot
->sl_seqid
++;
1831 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1833 /* cache solo and embedded create sessions under the state lock */
1834 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1836 nfs4_unlock_state();
1837 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1842 __free_session(new);
1846 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1848 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1849 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1851 return argp
->opcnt
== resp
->opcnt
;
1854 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1857 case NFS4_CDFC4_FORE
:
1858 case NFS4_CDFC4_BACK
:
1860 case NFS4_CDFC4_FORE_OR_BOTH
:
1861 case NFS4_CDFC4_BACK_OR_BOTH
:
1862 *dir
= NFS4_CDFC4_BOTH
;
1865 return nfserr_inval
;
1868 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1869 struct nfsd4_compound_state
*cstate
,
1870 struct nfsd4_bind_conn_to_session
*bcts
)
1873 struct nfsd4_conn
*conn
;
1875 if (!nfsd4_last_compound_op(rqstp
))
1876 return nfserr_not_only_op
;
1877 spin_lock(&client_lock
);
1878 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
);
1879 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1880 * client_lock iself: */
1881 if (cstate
->session
) {
1882 nfsd4_get_session(cstate
->session
);
1883 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1885 spin_unlock(&client_lock
);
1886 if (!cstate
->session
)
1887 return nfserr_badsession
;
1889 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1892 conn
= alloc_conn(rqstp
, bcts
->dir
);
1894 return nfserr_jukebox
;
1895 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1899 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1903 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1907 nfsd4_destroy_session(struct svc_rqst
*r
,
1908 struct nfsd4_compound_state
*cstate
,
1909 struct nfsd4_destroy_session
*sessionid
)
1911 struct nfsd4_session
*ses
;
1912 __be32 status
= nfserr_badsession
;
1915 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1916 * - Should we return nfserr_back_chan_busy if waiting for
1917 * callbacks on to-be-destroyed session?
1918 * - Do we need to clear any callback info from previous session?
1921 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1922 if (!nfsd4_last_compound_op(r
))
1923 return nfserr_not_only_op
;
1925 dump_sessionid(__func__
, &sessionid
->sessionid
);
1926 spin_lock(&client_lock
);
1927 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
);
1929 spin_unlock(&client_lock
);
1933 unhash_session(ses
);
1934 spin_unlock(&client_lock
);
1937 nfsd4_probe_callback_sync(ses
->se_client
);
1938 nfs4_unlock_state();
1940 spin_lock(&client_lock
);
1941 nfsd4_del_conns(ses
);
1942 nfsd4_put_session_locked(ses
);
1943 spin_unlock(&client_lock
);
1946 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1950 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1952 struct nfsd4_conn
*c
;
1954 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1955 if (c
->cn_xprt
== xpt
) {
1962 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1964 struct nfs4_client
*clp
= ses
->se_client
;
1965 struct nfsd4_conn
*c
;
1968 spin_lock(&clp
->cl_lock
);
1969 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1971 spin_unlock(&clp
->cl_lock
);
1975 __nfsd4_hash_conn(new, ses
);
1976 spin_unlock(&clp
->cl_lock
);
1977 ret
= nfsd4_register_conn(new);
1979 /* oops; xprt is already down: */
1980 nfsd4_conn_lost(&new->cn_xpt_user
);
1984 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
1986 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
1988 return args
->opcnt
> session
->se_fchannel
.maxops
;
1991 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
1992 struct nfsd4_session
*session
)
1994 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
1996 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2000 nfsd4_sequence(struct svc_rqst
*rqstp
,
2001 struct nfsd4_compound_state
*cstate
,
2002 struct nfsd4_sequence
*seq
)
2004 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2005 struct nfsd4_session
*session
;
2006 struct nfsd4_slot
*slot
;
2007 struct nfsd4_conn
*conn
;
2010 if (resp
->opcnt
!= 1)
2011 return nfserr_sequence_pos
;
2014 * Will be either used or freed by nfsd4_sequence_check_conn
2017 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2019 return nfserr_jukebox
;
2021 spin_lock(&client_lock
);
2022 status
= nfserr_badsession
;
2023 session
= find_in_sessionid_hashtbl(&seq
->sessionid
);
2027 status
= nfserr_too_many_ops
;
2028 if (nfsd4_session_too_many_ops(rqstp
, session
))
2031 status
= nfserr_req_too_big
;
2032 if (nfsd4_request_too_big(rqstp
, session
))
2035 status
= nfserr_badslot
;
2036 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2039 slot
= session
->se_slots
[seq
->slotid
];
2040 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2042 /* We do not negotiate the number of slots yet, so set the
2043 * maxslots to the session maxreqs which is used to encode
2044 * sr_highest_slotid and the sr_target_slot id to maxslots */
2045 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2047 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2048 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2049 if (status
== nfserr_replay_cache
) {
2050 status
= nfserr_seq_misordered
;
2051 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2053 cstate
->slot
= slot
;
2054 cstate
->session
= session
;
2055 /* Return the cached reply status and set cstate->status
2056 * for nfsd4_proc_compound processing */
2057 status
= nfsd4_replay_cache_entry(resp
, seq
);
2058 cstate
->status
= nfserr_replay_cache
;
2064 nfsd4_sequence_check_conn(conn
, session
);
2067 /* Success! bump slot seqid */
2068 slot
->sl_seqid
= seq
->seqid
;
2069 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2071 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2073 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2075 cstate
->slot
= slot
;
2076 cstate
->session
= session
;
2079 /* Hold a session reference until done processing the compound. */
2080 if (cstate
->session
) {
2081 struct nfs4_client
*clp
= session
->se_client
;
2083 nfsd4_get_session(cstate
->session
);
2084 atomic_inc(&clp
->cl_refcount
);
2085 switch (clp
->cl_cb_state
) {
2087 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2089 case NFSD4_CB_FAULT
:
2090 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2093 seq
->status_flags
= 0;
2097 spin_unlock(&client_lock
);
2098 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2103 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2105 struct nfs4_client
*conf
, *unconf
, *clp
;
2109 unconf
= find_unconfirmed_client(&dc
->clientid
, true);
2110 conf
= find_confirmed_client(&dc
->clientid
, true);
2115 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2116 status
= nfserr_clientid_busy
;
2120 /* rfc5661 18.50.3 */
2121 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2122 status
= nfserr_clientid_busy
;
2128 status
= nfserr_stale_clientid
;
2134 nfs4_unlock_state();
2135 dprintk("%s return %d\n", __func__
, ntohl(status
));
2140 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2144 if (rc
->rca_one_fs
) {
2145 if (!cstate
->current_fh
.fh_dentry
)
2146 return nfserr_nofilehandle
;
2148 * We don't take advantage of the rca_one_fs case.
2149 * That's OK, it's optional, we can safely ignore it.
2155 status
= nfserr_complete_already
;
2156 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2157 &cstate
->session
->se_client
->cl_flags
))
2160 status
= nfserr_stale_clientid
;
2161 if (is_client_expired(cstate
->session
->se_client
))
2163 * The following error isn't really legal.
2164 * But we only get here if the client just explicitly
2165 * destroyed the client. Surely it no longer cares what
2166 * error it gets back on an operation for the dead
2172 nfsd4_client_record_create(cstate
->session
->se_client
);
2174 nfs4_unlock_state();
2179 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2180 struct nfsd4_setclientid
*setclid
)
2182 struct xdr_netobj clname
= setclid
->se_name
;
2183 nfs4_verifier clverifier
= setclid
->se_verf
;
2184 unsigned int strhashval
;
2185 struct nfs4_client
*conf
, *unconf
, *new;
2187 char dname
[HEXDIR_LEN
];
2189 status
= nfs4_make_rec_clidname(dname
, &clname
);
2193 strhashval
= clientstr_hashval(dname
);
2195 /* Cases below refer to rfc 3530 section 14.2.33: */
2197 conf
= find_confirmed_client_by_str(dname
, strhashval
);
2200 status
= nfserr_clid_inuse
;
2201 if (clp_used_exchangeid(conf
))
2203 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2204 char addr_str
[INET6_ADDRSTRLEN
];
2205 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2207 dprintk("NFSD: setclientid: string in use by client "
2208 "at %s\n", addr_str
);
2212 unconf
= find_unconfirmed_client_by_str(dname
, strhashval
);
2214 expire_client(unconf
);
2215 status
= nfserr_jukebox
;
2216 new = create_client(clname
, dname
, rqstp
, &clverifier
);
2219 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2220 /* case 1: probable callback update */
2221 copy_clid(new, conf
);
2222 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2224 new->cl_minorversion
= 0;
2225 gen_callback(new, setclid
, rqstp
);
2226 add_to_unconfirmed(new, strhashval
);
2227 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2228 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2229 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2232 nfs4_unlock_state();
2238 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2239 struct nfsd4_compound_state
*cstate
,
2240 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2242 struct nfs4_client
*conf
, *unconf
;
2243 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2244 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2246 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
2248 if (STALE_CLIENTID(clid
, nn
))
2249 return nfserr_stale_clientid
;
2252 conf
= find_confirmed_client(clid
, false);
2253 unconf
= find_unconfirmed_client(clid
, false);
2255 * We try hard to give out unique clientid's, so if we get an
2256 * attempt to confirm the same clientid with a different cred,
2257 * there's a bug somewhere. Let's charitably assume it's our
2260 status
= nfserr_serverfault
;
2261 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2263 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2265 /* cases below refer to rfc 3530 section 14.2.34: */
2266 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2267 if (conf
&& !unconf
) /* case 2: probable retransmit */
2269 else /* case 4: client hasn't noticed we rebooted yet? */
2270 status
= nfserr_stale_clientid
;
2274 if (conf
) { /* case 1: callback update */
2275 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2276 nfsd4_probe_callback(conf
);
2277 expire_client(unconf
);
2278 } else { /* case 3: normal case; new or rebooted client */
2279 unsigned int hash
= clientstr_hashval(unconf
->cl_recdir
);
2281 conf
= find_confirmed_client_by_str(unconf
->cl_recdir
, hash
);
2283 expire_client(conf
);
2284 move_to_confirmed(unconf
);
2285 nfsd4_probe_callback(unconf
);
2288 nfs4_unlock_state();
2292 static struct nfs4_file
*nfsd4_alloc_file(void)
2294 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2297 /* OPEN Share state helper functions */
2298 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2300 unsigned int hashval
= file_hashval(ino
);
2302 atomic_set(&fp
->fi_ref
, 1);
2303 INIT_LIST_HEAD(&fp
->fi_hash
);
2304 INIT_LIST_HEAD(&fp
->fi_stateids
);
2305 INIT_LIST_HEAD(&fp
->fi_delegations
);
2306 fp
->fi_inode
= igrab(ino
);
2307 fp
->fi_had_conflict
= false;
2308 fp
->fi_lease
= NULL
;
2309 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2310 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2311 spin_lock(&recall_lock
);
2312 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2313 spin_unlock(&recall_lock
);
2317 nfsd4_free_slab(struct kmem_cache
**slab
)
2321 kmem_cache_destroy(*slab
);
2326 nfsd4_free_slabs(void)
2328 nfsd4_free_slab(&openowner_slab
);
2329 nfsd4_free_slab(&lockowner_slab
);
2330 nfsd4_free_slab(&file_slab
);
2331 nfsd4_free_slab(&stateid_slab
);
2332 nfsd4_free_slab(&deleg_slab
);
2336 nfsd4_init_slabs(void)
2338 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2339 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2340 if (openowner_slab
== NULL
)
2342 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2343 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2344 if (lockowner_slab
== NULL
)
2346 file_slab
= kmem_cache_create("nfsd4_files",
2347 sizeof(struct nfs4_file
), 0, 0, NULL
);
2348 if (file_slab
== NULL
)
2350 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2351 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2352 if (stateid_slab
== NULL
)
2354 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2355 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2356 if (deleg_slab
== NULL
)
2361 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2365 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2367 kfree(oo
->oo_owner
.so_owner
.data
);
2368 kmem_cache_free(openowner_slab
, oo
);
2371 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2373 kfree(lo
->lo_owner
.so_owner
.data
);
2374 kmem_cache_free(lockowner_slab
, lo
);
2377 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2379 rp
->rp_status
= nfserr_serverfault
;
2381 rp
->rp_buf
= rp
->rp_ibuf
;
2384 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2386 struct nfs4_stateowner
*sop
;
2388 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2392 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2393 if (!sop
->so_owner
.data
) {
2394 kmem_cache_free(slab
, sop
);
2397 sop
->so_owner
.len
= owner
->len
;
2399 INIT_LIST_HEAD(&sop
->so_stateids
);
2400 sop
->so_client
= clp
;
2401 init_nfs4_replay(&sop
->so_replay
);
2405 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2407 list_add(&oo
->oo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
2408 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2411 static struct nfs4_openowner
*
2412 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2413 struct nfs4_openowner
*oo
;
2415 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2418 oo
->oo_owner
.so_is_open_owner
= 1;
2419 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2420 oo
->oo_flags
= NFS4_OO_NEW
;
2422 oo
->oo_last_closed_stid
= NULL
;
2423 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2424 hash_openowner(oo
, clp
, strhashval
);
2428 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2429 struct nfs4_openowner
*oo
= open
->op_openowner
;
2430 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2432 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2433 INIT_LIST_HEAD(&stp
->st_lockowners
);
2434 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2435 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2436 stp
->st_stateowner
= &oo
->oo_owner
;
2439 stp
->st_access_bmap
= 0;
2440 stp
->st_deny_bmap
= 0;
2441 set_access(open
->op_share_access
, stp
);
2442 set_deny(open
->op_share_deny
, stp
);
2443 stp
->st_openstp
= NULL
;
2447 move_to_close_lru(struct nfs4_openowner
*oo
)
2449 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2451 list_move_tail(&oo
->oo_close_lru
, &close_lru
);
2452 oo
->oo_time
= get_seconds();
2456 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2459 return (sop
->so_owner
.len
== owner
->len
) &&
2460 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2461 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2464 static struct nfs4_openowner
*
2465 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
, bool sessions
)
2467 struct nfs4_stateowner
*so
;
2468 struct nfs4_openowner
*oo
;
2469 struct nfs4_client
*clp
;
2471 list_for_each_entry(so
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
2472 if (!so
->so_is_open_owner
)
2474 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2476 clp
= oo
->oo_owner
.so_client
;
2477 if ((bool)clp
->cl_minorversion
!= sessions
)
2479 renew_client(oo
->oo_owner
.so_client
);
2486 /* search file_hashtbl[] for file */
2487 static struct nfs4_file
*
2488 find_file(struct inode
*ino
)
2490 unsigned int hashval
= file_hashval(ino
);
2491 struct nfs4_file
*fp
;
2493 spin_lock(&recall_lock
);
2494 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2495 if (fp
->fi_inode
== ino
) {
2497 spin_unlock(&recall_lock
);
2501 spin_unlock(&recall_lock
);
2506 * Called to check deny when READ with all zero stateid or
2507 * WRITE with all zero or all one stateid
2510 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2512 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2513 struct nfs4_file
*fp
;
2514 struct nfs4_ol_stateid
*stp
;
2517 dprintk("NFSD: nfs4_share_conflict\n");
2519 fp
= find_file(ino
);
2522 ret
= nfserr_locked
;
2523 /* Search for conflicting share reservations */
2524 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2525 if (test_deny(deny_type
, stp
) ||
2526 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2535 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2537 /* We're assuming the state code never drops its reference
2538 * without first removing the lease. Since we're in this lease
2539 * callback (and since the lease code is serialized by the kernel
2540 * lock) we know the server hasn't removed the lease yet, we know
2541 * it's safe to take a reference: */
2542 atomic_inc(&dp
->dl_count
);
2544 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2546 /* only place dl_time is set. protected by lock_flocks*/
2547 dp
->dl_time
= get_seconds();
2549 nfsd4_cb_recall(dp
);
2552 /* Called from break_lease() with lock_flocks() held. */
2553 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2555 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2556 struct nfs4_delegation
*dp
;
2559 /* We assume break_lease is only called once per lease: */
2560 BUG_ON(fp
->fi_had_conflict
);
2562 * We don't want the locks code to timeout the lease for us;
2563 * we'll remove it ourself if a delegation isn't returned
2566 fl
->fl_break_time
= 0;
2568 spin_lock(&recall_lock
);
2569 fp
->fi_had_conflict
= true;
2570 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2571 nfsd_break_one_deleg(dp
);
2572 spin_unlock(&recall_lock
);
2576 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2579 return lease_modify(onlist
, arg
);
2584 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2585 .lm_break
= nfsd_break_deleg_cb
,
2586 .lm_change
= nfsd_change_deleg_cb
,
2589 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2591 if (nfsd4_has_session(cstate
))
2593 if (seqid
== so
->so_seqid
- 1)
2594 return nfserr_replay_me
;
2595 if (seqid
== so
->so_seqid
)
2597 return nfserr_bad_seqid
;
2601 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2602 struct nfsd4_open
*open
)
2604 clientid_t
*clientid
= &open
->op_clientid
;
2605 struct nfs4_client
*clp
= NULL
;
2606 unsigned int strhashval
;
2607 struct nfs4_openowner
*oo
= NULL
;
2609 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
2611 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2612 return nfserr_stale_clientid
;
2614 * In case we need it later, after we've already created the
2615 * file and don't want to risk a further failure:
2617 open
->op_file
= nfsd4_alloc_file();
2618 if (open
->op_file
== NULL
)
2619 return nfserr_jukebox
;
2621 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2622 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
);
2623 open
->op_openowner
= oo
;
2625 clp
= find_confirmed_client(clientid
, cstate
->minorversion
);
2627 return nfserr_expired
;
2630 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2631 /* Replace unconfirmed owners without checking for replay. */
2632 clp
= oo
->oo_owner
.so_client
;
2633 release_openowner(oo
);
2634 open
->op_openowner
= NULL
;
2637 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2640 clp
= oo
->oo_owner
.so_client
;
2643 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2645 return nfserr_jukebox
;
2646 open
->op_openowner
= oo
;
2648 open
->op_stp
= nfs4_alloc_stateid(clp
);
2650 return nfserr_jukebox
;
2654 static inline __be32
2655 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2657 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2658 return nfserr_openmode
;
2663 static int share_access_to_flags(u32 share_access
)
2665 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2668 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2670 struct nfs4_stid
*ret
;
2672 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2675 return delegstateid(ret
);
2678 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2680 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2681 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2685 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2686 struct nfs4_delegation
**dp
)
2689 __be32 status
= nfserr_bad_stateid
;
2691 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2694 flags
= share_access_to_flags(open
->op_share_access
);
2695 status
= nfs4_check_delegmode(*dp
, flags
);
2699 if (!nfsd4_is_deleg_cur(open
))
2703 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2708 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2710 struct nfs4_ol_stateid
*local
;
2711 struct nfs4_openowner
*oo
= open
->op_openowner
;
2713 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2714 /* ignore lock owners */
2715 if (local
->st_stateowner
->so_is_open_owner
== 0)
2717 /* remember if we have seen this open owner */
2718 if (local
->st_stateowner
== &oo
->oo_owner
)
2720 /* check for conflicting share reservations */
2721 if (!test_share(local
, open
))
2722 return nfserr_share_denied
;
2727 static inline int nfs4_access_to_access(u32 nfs4_access
)
2731 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2732 flags
|= NFSD_MAY_READ
;
2733 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2734 flags
|= NFSD_MAY_WRITE
;
2738 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2739 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2742 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2743 int access
= nfs4_access_to_access(open
->op_share_access
);
2745 if (!fp
->fi_fds
[oflag
]) {
2746 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2747 &fp
->fi_fds
[oflag
]);
2751 nfs4_file_get_access(fp
, oflag
);
2756 static inline __be32
2757 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2758 struct nfsd4_open
*open
)
2760 struct iattr iattr
= {
2761 .ia_valid
= ATTR_SIZE
,
2764 if (!open
->op_truncate
)
2766 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2767 return nfserr_inval
;
2768 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2772 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
)
2774 u32 op_share_access
= open
->op_share_access
;
2778 new_access
= !test_access(op_share_access
, stp
);
2780 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2784 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2787 int oflag
= nfs4_access_to_omode(op_share_access
);
2788 nfs4_file_put_access(fp
, oflag
);
2792 /* remember the open */
2793 set_access(op_share_access
, stp
);
2794 set_deny(open
->op_share_deny
, stp
);
2801 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2803 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2806 /* Should we give out recallable state?: */
2807 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2809 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2812 * In the sessions case, since we don't have to establish a
2813 * separate connection for callbacks, we assume it's OK
2814 * until we hear otherwise:
2816 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2819 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2821 struct file_lock
*fl
;
2823 fl
= locks_alloc_lock();
2826 locks_init_lock(fl
);
2827 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2828 fl
->fl_flags
= FL_LEASE
;
2829 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2830 fl
->fl_end
= OFFSET_MAX
;
2831 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2832 fl
->fl_pid
= current
->tgid
;
2836 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2838 struct nfs4_file
*fp
= dp
->dl_file
;
2839 struct file_lock
*fl
;
2842 fl
= nfs4_alloc_init_lease(dp
, flag
);
2845 fl
->fl_file
= find_readable_file(fp
);
2846 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2847 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2849 list_del_init(&dp
->dl_perclnt
);
2850 locks_free_lock(fl
);
2854 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2855 atomic_set(&fp
->fi_delegees
, 1);
2856 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2860 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2862 struct nfs4_file
*fp
= dp
->dl_file
;
2865 return nfs4_setlease(dp
, flag
);
2866 spin_lock(&recall_lock
);
2867 if (fp
->fi_had_conflict
) {
2868 spin_unlock(&recall_lock
);
2871 atomic_inc(&fp
->fi_delegees
);
2872 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2873 spin_unlock(&recall_lock
);
2874 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2878 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2880 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2881 if (status
== -EAGAIN
)
2882 open
->op_why_no_deleg
= WND4_CONTENTION
;
2884 open
->op_why_no_deleg
= WND4_RESOURCE
;
2885 switch (open
->op_deleg_want
) {
2886 case NFS4_SHARE_WANT_READ_DELEG
:
2887 case NFS4_SHARE_WANT_WRITE_DELEG
:
2888 case NFS4_SHARE_WANT_ANY_DELEG
:
2890 case NFS4_SHARE_WANT_CANCEL
:
2891 open
->op_why_no_deleg
= WND4_CANCELLED
;
2893 case NFS4_SHARE_WANT_NO_DELEG
:
2894 BUG(); /* not supposed to get here */
2900 * Attempt to hand out a delegation.
2903 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2904 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2906 struct nfs4_delegation
*dp
;
2907 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2909 int status
= 0, flag
= 0;
2911 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2912 flag
= NFS4_OPEN_DELEGATE_NONE
;
2913 open
->op_recall
= 0;
2914 switch (open
->op_claim_type
) {
2915 case NFS4_OPEN_CLAIM_PREVIOUS
:
2917 open
->op_recall
= 1;
2918 flag
= open
->op_delegate_type
;
2919 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2922 case NFS4_OPEN_CLAIM_NULL
:
2923 /* Let's not give out any delegations till everyone's
2924 * had the chance to reclaim theirs.... */
2925 if (locks_in_grace(net
))
2927 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2929 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2930 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2932 flag
= NFS4_OPEN_DELEGATE_READ
;
2938 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2941 status
= nfs4_set_delegation(dp
, flag
);
2945 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2947 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2948 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2950 open
->op_delegate_type
= flag
;
2951 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2952 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2953 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2954 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2956 /* 4.1 client asking for a delegation? */
2957 if (open
->op_deleg_want
)
2958 nfsd4_open_deleg_none_ext(open
, status
);
2962 nfs4_put_delegation(dp
);
2964 flag
= NFS4_OPEN_DELEGATE_NONE
;
2968 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2969 struct nfs4_delegation
*dp
)
2971 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
2972 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2973 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2974 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
2975 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
2976 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
2977 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2978 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
2980 /* Otherwise the client must be confused wanting a delegation
2981 * it already has, therefore we don't return
2982 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
2987 * called with nfs4_lock_state() held.
2990 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
2992 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2993 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
2994 struct nfs4_file
*fp
= NULL
;
2995 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2996 struct nfs4_ol_stateid
*stp
= NULL
;
2997 struct nfs4_delegation
*dp
= NULL
;
3001 * Lookup file; if found, lookup stateid and check open request,
3002 * and check for delegations in the process of being recalled.
3003 * If not found, create the nfs4_file struct
3005 fp
= find_file(ino
);
3007 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3009 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3013 status
= nfserr_bad_stateid
;
3014 if (nfsd4_is_deleg_cur(open
))
3016 status
= nfserr_jukebox
;
3018 open
->op_file
= NULL
;
3019 nfsd4_init_file(fp
, ino
);
3023 * OPEN the file, or upgrade an existing OPEN.
3024 * If truncate fails, the OPEN fails.
3027 /* Stateid was found, this is an OPEN upgrade */
3028 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3032 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3035 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3039 open
->op_stp
= NULL
;
3040 init_open_stateid(stp
, fp
, open
);
3042 update_stateid(&stp
->st_stid
.sc_stateid
);
3043 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3045 if (nfsd4_has_session(&resp
->cstate
)) {
3046 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3048 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3049 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3050 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3056 * Attempt to hand out a delegation. No error return, because the
3057 * OPEN succeeds even if we fail.
3059 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3063 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3064 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3066 /* 4.1 client trying to upgrade/downgrade delegation? */
3067 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3068 open
->op_deleg_want
)
3069 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3073 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3074 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3076 * To finish the open response, we just need to set the rflags.
3078 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3079 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3080 !nfsd4_has_session(&resp
->cstate
))
3081 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3086 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3088 if (open
->op_openowner
) {
3089 struct nfs4_openowner
*oo
= open
->op_openowner
;
3091 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3092 list_del_init(&oo
->oo_close_lru
);
3093 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3095 release_openowner(oo
);
3096 open
->op_openowner
= NULL
;
3098 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3102 nfsd4_free_file(open
->op_file
);
3104 free_generic_stateid(open
->op_stp
);
3108 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3111 struct nfs4_client
*clp
;
3113 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
3116 dprintk("process_renew(%08x/%08x): starting\n",
3117 clid
->cl_boot
, clid
->cl_id
);
3118 status
= nfserr_stale_clientid
;
3119 if (STALE_CLIENTID(clid
, nn
))
3121 clp
= find_confirmed_client(clid
, cstate
->minorversion
);
3122 status
= nfserr_expired
;
3124 /* We assume the client took too long to RENEW. */
3125 dprintk("nfsd4_renew: clientid not found!\n");
3128 status
= nfserr_cb_path_down
;
3129 if (!list_empty(&clp
->cl_delegations
)
3130 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3134 nfs4_unlock_state();
3139 nfsd4_end_grace(struct net
*net
)
3141 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3143 /* do nothing if grace period already ended */
3144 if (nn
->grace_ended
)
3147 dprintk("NFSD: end of grace period\n");
3148 nn
->grace_ended
= true;
3149 nfsd4_record_grace_done(net
, nn
->boot_time
);
3150 locks_end_grace(&nn
->nfsd4_manager
);
3152 * Now that every NFSv4 client has had the chance to recover and
3153 * to see the (possibly new, possibly shorter) lease time, we
3154 * can safely set the next grace time to the current lease time:
3156 nfsd4_grace
= nfsd4_lease
;
3160 nfs4_laundromat(void)
3162 struct nfs4_client
*clp
;
3163 struct nfs4_openowner
*oo
;
3164 struct nfs4_delegation
*dp
;
3165 struct list_head
*pos
, *next
, reaplist
;
3166 time_t cutoff
= get_seconds() - nfsd4_lease
;
3167 time_t t
, clientid_val
= nfsd4_lease
;
3168 time_t u
, test_val
= nfsd4_lease
;
3172 dprintk("NFSD: laundromat service - starting\n");
3173 nfsd4_end_grace(&init_net
);
3174 INIT_LIST_HEAD(&reaplist
);
3175 spin_lock(&client_lock
);
3176 list_for_each_safe(pos
, next
, &client_lru
) {
3177 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3178 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3179 t
= clp
->cl_time
- cutoff
;
3180 if (clientid_val
> t
)
3184 if (atomic_read(&clp
->cl_refcount
)) {
3185 dprintk("NFSD: client in use (clientid %08x)\n",
3186 clp
->cl_clientid
.cl_id
);
3189 unhash_client_locked(clp
);
3190 list_add(&clp
->cl_lru
, &reaplist
);
3192 spin_unlock(&client_lock
);
3193 list_for_each_safe(pos
, next
, &reaplist
) {
3194 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3195 dprintk("NFSD: purging unused client (clientid %08x)\n",
3196 clp
->cl_clientid
.cl_id
);
3199 spin_lock(&recall_lock
);
3200 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3201 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3202 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3203 u
= dp
->dl_time
- cutoff
;
3208 list_move(&dp
->dl_recall_lru
, &reaplist
);
3210 spin_unlock(&recall_lock
);
3211 list_for_each_safe(pos
, next
, &reaplist
) {
3212 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3213 unhash_delegation(dp
);
3215 test_val
= nfsd4_lease
;
3216 list_for_each_safe(pos
, next
, &close_lru
) {
3217 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3218 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3219 u
= oo
->oo_time
- cutoff
;
3224 release_openowner(oo
);
3226 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3227 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3228 nfs4_unlock_state();
3229 return clientid_val
;
3232 static struct workqueue_struct
*laundry_wq
;
3233 static void laundromat_main(struct work_struct
*);
3234 static DECLARE_DELAYED_WORK(laundromat_work
, laundromat_main
);
3237 laundromat_main(struct work_struct
*not_used
)
3241 t
= nfs4_laundromat();
3242 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3243 queue_delayed_work(laundry_wq
, &laundromat_work
, t
*HZ
);
3246 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3248 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3249 return nfserr_bad_stateid
;
3254 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3256 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3258 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3259 STATEID_VAL(stateid
));
3264 access_permit_read(struct nfs4_ol_stateid
*stp
)
3266 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3267 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3268 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3272 access_permit_write(struct nfs4_ol_stateid
*stp
)
3274 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3275 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3279 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3281 __be32 status
= nfserr_openmode
;
3283 /* For lock stateid's, we test the parent open, not the lock: */
3284 if (stp
->st_openstp
)
3285 stp
= stp
->st_openstp
;
3286 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3288 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3295 static inline __be32
3296 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3298 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3300 else if (locks_in_grace(net
)) {
3301 /* Answer in remaining cases depends on existence of
3302 * conflicting state; so we must wait out the grace period. */
3303 return nfserr_grace
;
3304 } else if (flags
& WR_STATE
)
3305 return nfs4_share_conflict(current_fh
,
3306 NFS4_SHARE_DENY_WRITE
);
3307 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3308 return nfs4_share_conflict(current_fh
,
3309 NFS4_SHARE_DENY_READ
);
3313 * Allow READ/WRITE during grace period on recovered state only for files
3314 * that are not able to provide mandatory locking.
3317 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3319 return locks_in_grace(net
) && mandatory_lock(inode
);
3322 /* Returns true iff a is later than b: */
3323 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3325 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3328 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3331 * When sessions are used the stateid generation number is ignored
3334 if (has_session
&& in
->si_generation
== 0)
3337 if (in
->si_generation
== ref
->si_generation
)
3340 /* If the client sends us a stateid from the future, it's buggy: */
3341 if (stateid_generation_after(in
, ref
))
3342 return nfserr_bad_stateid
;
3344 * However, we could see a stateid from the past, even from a
3345 * non-buggy client. For example, if the client sends a lock
3346 * while some IO is outstanding, the lock may bump si_generation
3347 * while the IO is still in flight. The client could avoid that
3348 * situation by waiting for responses on all the IO requests,
3349 * but better performance may result in retrying IO that
3350 * receives an old_stateid error if requests are rarely
3351 * reordered in flight:
3353 return nfserr_old_stateid
;
3356 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3358 struct nfs4_stid
*s
;
3359 struct nfs4_ol_stateid
*ols
;
3362 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3363 return nfserr_bad_stateid
;
3364 /* Client debugging aid. */
3365 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3366 char addr_str
[INET6_ADDRSTRLEN
];
3367 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3369 pr_warn_ratelimited("NFSD: client %s testing state ID "
3370 "with incorrect client ID\n", addr_str
);
3371 return nfserr_bad_stateid
;
3373 s
= find_stateid(cl
, stateid
);
3375 return nfserr_bad_stateid
;
3376 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3379 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3381 ols
= openlockstateid(s
);
3382 if (ols
->st_stateowner
->so_is_open_owner
3383 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3384 return nfserr_bad_stateid
;
3388 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
, struct nfs4_stid
**s
, bool sessions
)
3390 struct nfs4_client
*cl
;
3391 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
3393 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3394 return nfserr_bad_stateid
;
3395 if (STALE_STATEID(stateid
, nn
))
3396 return nfserr_stale_stateid
;
3397 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
, sessions
);
3399 return nfserr_expired
;
3400 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3402 return nfserr_bad_stateid
;
3408 * Checks for stateid operations
3411 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3412 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3414 struct nfs4_stid
*s
;
3415 struct nfs4_ol_stateid
*stp
= NULL
;
3416 struct nfs4_delegation
*dp
= NULL
;
3417 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3418 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3424 if (grace_disallows_io(net
, ino
))
3425 return nfserr_grace
;
3427 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3428 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3430 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
, &s
, cstate
->minorversion
);
3433 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3436 switch (s
->sc_type
) {
3437 case NFS4_DELEG_STID
:
3438 dp
= delegstateid(s
);
3439 status
= nfs4_check_delegmode(dp
, flags
);
3443 *filpp
= dp
->dl_file
->fi_deleg_file
;
3447 case NFS4_OPEN_STID
:
3448 case NFS4_LOCK_STID
:
3449 stp
= openlockstateid(s
);
3450 status
= nfs4_check_fh(current_fh
, stp
);
3453 if (stp
->st_stateowner
->so_is_open_owner
3454 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3456 status
= nfs4_check_openmode(stp
, flags
);
3460 if (flags
& RD_STATE
)
3461 *filpp
= find_readable_file(stp
->st_file
);
3463 *filpp
= find_writeable_file(stp
->st_file
);
3467 return nfserr_bad_stateid
;
3475 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3477 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3478 return nfserr_locks_held
;
3479 release_lock_stateid(stp
);
3484 * Test if the stateid is valid
3487 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3488 struct nfsd4_test_stateid
*test_stateid
)
3490 struct nfsd4_test_stateid_id
*stateid
;
3491 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3494 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3495 stateid
->ts_id_status
=
3496 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3497 nfs4_unlock_state();
3503 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3504 struct nfsd4_free_stateid
*free_stateid
)
3506 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3507 struct nfs4_stid
*s
;
3508 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3509 __be32 ret
= nfserr_bad_stateid
;
3512 s
= find_stateid(cl
, stateid
);
3515 switch (s
->sc_type
) {
3516 case NFS4_DELEG_STID
:
3517 ret
= nfserr_locks_held
;
3519 case NFS4_OPEN_STID
:
3520 case NFS4_LOCK_STID
:
3521 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3524 if (s
->sc_type
== NFS4_LOCK_STID
)
3525 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3527 ret
= nfserr_locks_held
;
3530 ret
= nfserr_bad_stateid
;
3533 nfs4_unlock_state();
3540 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3541 RD_STATE
: WR_STATE
;
3544 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3546 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3547 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3550 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3553 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3555 * "Closed" stateid's exist *only* to return
3556 * nfserr_replay_me from the previous step.
3558 return nfserr_bad_stateid
;
3559 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3562 return nfs4_check_fh(current_fh
, stp
);
3566 * Checks for sequence id mutating operations.
3569 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3570 stateid_t
*stateid
, char typemask
,
3571 struct nfs4_ol_stateid
**stpp
)
3574 struct nfs4_stid
*s
;
3576 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3577 seqid
, STATEID_VAL(stateid
));
3580 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
, cstate
->minorversion
);
3583 *stpp
= openlockstateid(s
);
3584 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3586 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3589 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
, stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
)
3592 struct nfs4_openowner
*oo
;
3594 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3595 NFS4_OPEN_STID
, stpp
);
3598 oo
= openowner((*stpp
)->st_stateowner
);
3599 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3600 return nfserr_bad_stateid
;
3605 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3606 struct nfsd4_open_confirm
*oc
)
3609 struct nfs4_openowner
*oo
;
3610 struct nfs4_ol_stateid
*stp
;
3612 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3613 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3614 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3616 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3622 status
= nfs4_preprocess_seqid_op(cstate
,
3623 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3624 NFS4_OPEN_STID
, &stp
);
3627 oo
= openowner(stp
->st_stateowner
);
3628 status
= nfserr_bad_stateid
;
3629 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3631 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3632 update_stateid(&stp
->st_stid
.sc_stateid
);
3633 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3634 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3635 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3637 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3640 if (!cstate
->replay_owner
)
3641 nfs4_unlock_state();
3645 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3647 if (!test_access(access
, stp
))
3649 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3650 clear_access(access
, stp
);
3653 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3655 switch (to_access
) {
3656 case NFS4_SHARE_ACCESS_READ
:
3657 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3658 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3660 case NFS4_SHARE_ACCESS_WRITE
:
3661 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3662 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3664 case NFS4_SHARE_ACCESS_BOTH
:
3672 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3675 for (i
= 0; i
< 4; i
++) {
3676 if ((i
& deny
) != i
)
3682 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3683 struct nfsd4_compound_state
*cstate
,
3684 struct nfsd4_open_downgrade
*od
)
3687 struct nfs4_ol_stateid
*stp
;
3689 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3690 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3691 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3693 /* We don't yet support WANT bits: */
3694 if (od
->od_deleg_want
)
3695 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3699 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3700 &od
->od_stateid
, &stp
);
3703 status
= nfserr_inval
;
3704 if (!test_access(od
->od_share_access
, stp
)) {
3705 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3706 stp
->st_access_bmap
, od
->od_share_access
);
3709 if (!test_deny(od
->od_share_deny
, stp
)) {
3710 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3711 stp
->st_deny_bmap
, od
->od_share_deny
);
3714 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3716 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3718 update_stateid(&stp
->st_stid
.sc_stateid
);
3719 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3722 if (!cstate
->replay_owner
)
3723 nfs4_unlock_state();
3727 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3729 struct nfs4_openowner
*oo
;
3730 struct nfs4_ol_stateid
*s
;
3732 if (!so
->so_is_open_owner
)
3735 s
= oo
->oo_last_closed_stid
;
3738 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3739 /* Release the last_closed_stid on the next seqid bump: */
3740 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3743 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3744 release_last_closed_stateid(oo
);
3747 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3749 unhash_open_stateid(s
);
3750 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3754 * nfs4_unlock_state() called after encode
3757 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3758 struct nfsd4_close
*close
)
3761 struct nfs4_openowner
*oo
;
3762 struct nfs4_ol_stateid
*stp
;
3764 dprintk("NFSD: nfsd4_close on file %.*s\n",
3765 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3766 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3769 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3771 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3775 oo
= openowner(stp
->st_stateowner
);
3777 update_stateid(&stp
->st_stid
.sc_stateid
);
3778 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3780 nfsd4_close_open_stateid(stp
);
3781 release_last_closed_stateid(oo
);
3782 oo
->oo_last_closed_stid
= stp
;
3784 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3785 if (cstate
->minorversion
) {
3786 release_openowner(oo
);
3787 cstate
->replay_owner
= NULL
;
3790 * In the 4.0 case we need to keep the owners around a
3791 * little while to handle CLOSE replay.
3793 if (list_empty(&oo
->oo_owner
.so_stateids
))
3794 move_to_close_lru(oo
);
3798 if (!cstate
->replay_owner
)
3799 nfs4_unlock_state();
3804 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3805 struct nfsd4_delegreturn
*dr
)
3807 struct nfs4_delegation
*dp
;
3808 stateid_t
*stateid
= &dr
->dr_stateid
;
3809 struct nfs4_stid
*s
;
3810 struct inode
*inode
;
3813 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3815 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
3818 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
, cstate
->minorversion
);
3821 dp
= delegstateid(s
);
3822 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3826 unhash_delegation(dp
);
3828 nfs4_unlock_state();
3834 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3836 #define LOCKOWNER_INO_HASH_BITS 8
3837 #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS)
3838 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3841 end_offset(u64 start
, u64 len
)
3846 return end
>= start
? end
: NFS4_MAX_UINT64
;
3849 /* last octet in a range */
3851 last_byte_offset(u64 start
, u64 len
)
3857 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3860 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3862 return (file_hashval(inode
) + cl_id
3863 + opaque_hashval(ownername
->data
, ownername
->len
))
3864 & LOCKOWNER_INO_HASH_MASK
;
3867 static struct list_head lockowner_ino_hashtbl
[LOCKOWNER_INO_HASH_SIZE
];
3870 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3871 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3872 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3873 * locking, this prevents us from being completely protocol-compliant. The
3874 * real solution to this problem is to start using unsigned file offsets in
3875 * the VFS, but this is a very deep change!
3878 nfs4_transform_lock_offset(struct file_lock
*lock
)
3880 if (lock
->fl_start
< 0)
3881 lock
->fl_start
= OFFSET_MAX
;
3882 if (lock
->fl_end
< 0)
3883 lock
->fl_end
= OFFSET_MAX
;
3886 /* Hack!: For now, we're defining this just so we can use a pointer to it
3887 * as a unique cookie to identify our (NFSv4's) posix locks. */
3888 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3892 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3894 struct nfs4_lockowner
*lo
;
3896 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3897 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3898 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3899 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3900 if (!deny
->ld_owner
.data
)
3901 /* We just don't care that much */
3903 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3904 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3907 deny
->ld_owner
.len
= 0;
3908 deny
->ld_owner
.data
= NULL
;
3909 deny
->ld_clientid
.cl_boot
= 0;
3910 deny
->ld_clientid
.cl_id
= 0;
3912 deny
->ld_start
= fl
->fl_start
;
3913 deny
->ld_length
= NFS4_MAX_UINT64
;
3914 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3915 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3916 deny
->ld_type
= NFS4_READ_LT
;
3917 if (fl
->fl_type
!= F_RDLCK
)
3918 deny
->ld_type
= NFS4_WRITE_LT
;
3921 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3923 struct nfs4_ol_stateid
*lst
;
3925 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3927 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3928 struct nfs4_ol_stateid
, st_perstateowner
);
3929 return lst
->st_file
->fi_inode
== inode
;
3932 static struct nfs4_lockowner
*
3933 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3934 struct xdr_netobj
*owner
)
3936 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3937 struct nfs4_lockowner
*lo
;
3939 list_for_each_entry(lo
, &lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3940 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3946 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3948 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3949 unsigned int inohash
= lockowner_ino_hashval(inode
,
3950 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3952 list_add(&lo
->lo_owner
.so_strhash
, &ownerstr_hashtbl
[strhashval
]);
3953 list_add(&lo
->lo_owner_ino_hash
, &lockowner_ino_hashtbl
[inohash
]);
3954 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
3958 * Alloc a lock owner structure.
3959 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
3962 * strhashval = ownerstr_hashval
3965 static struct nfs4_lockowner
*
3966 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
3967 struct nfs4_lockowner
*lo
;
3969 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
3972 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
3973 lo
->lo_owner
.so_is_open_owner
= 0;
3974 /* It is the openowner seqid that will be incremented in encode in the
3975 * case of new lockowners; so increment the lock seqid manually: */
3976 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
3977 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
3981 static struct nfs4_ol_stateid
*
3982 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
3984 struct nfs4_ol_stateid
*stp
;
3985 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
3987 stp
= nfs4_alloc_stateid(clp
);
3990 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
3991 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
3992 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
3993 stp
->st_stateowner
= &lo
->lo_owner
;
3996 stp
->st_access_bmap
= 0;
3997 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
3998 stp
->st_openstp
= open_stp
;
4003 check_lock_length(u64 offset
, u64 length
)
4005 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4006 LOFF_OVERFLOW(offset
, length
)));
4009 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4011 struct nfs4_file
*fp
= lock_stp
->st_file
;
4012 int oflag
= nfs4_access_to_omode(access
);
4014 if (test_access(access
, lock_stp
))
4016 nfs4_file_get_access(fp
, oflag
);
4017 set_access(access
, lock_stp
);
4020 static __be32
lookup_or_create_lock_state(struct nfsd4_compound_state
*cstate
, struct nfs4_ol_stateid
*ost
, struct nfsd4_lock
*lock
, struct nfs4_ol_stateid
**lst
, bool *new)
4022 struct nfs4_file
*fi
= ost
->st_file
;
4023 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4024 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4025 struct nfs4_lockowner
*lo
;
4026 unsigned int strhashval
;
4028 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
, &lock
->v
.new.owner
);
4030 if (!cstate
->minorversion
)
4031 return nfserr_bad_seqid
;
4032 /* XXX: a lockowner always has exactly one stateid: */
4033 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4034 struct nfs4_ol_stateid
, st_perstateowner
);
4037 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4038 &lock
->v
.new.owner
);
4039 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4041 return nfserr_jukebox
;
4042 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4044 release_lockowner(lo
);
4045 return nfserr_jukebox
;
4055 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4056 struct nfsd4_lock
*lock
)
4058 struct nfs4_openowner
*open_sop
= NULL
;
4059 struct nfs4_lockowner
*lock_sop
= NULL
;
4060 struct nfs4_ol_stateid
*lock_stp
;
4061 struct file
*filp
= NULL
;
4062 struct file_lock
*file_lock
= NULL
;
4063 struct file_lock
*conflock
= NULL
;
4065 bool new_state
= false;
4068 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4070 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4071 (long long) lock
->lk_offset
,
4072 (long long) lock
->lk_length
);
4074 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4075 return nfserr_inval
;
4077 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4078 S_IFREG
, NFSD_MAY_LOCK
))) {
4079 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4085 if (lock
->lk_is_new
) {
4086 struct nfs4_ol_stateid
*open_stp
= NULL
;
4088 if (nfsd4_has_session(cstate
))
4089 /* See rfc 5661 18.10.3: given clientid is ignored: */
4090 memcpy(&lock
->v
.new.clientid
,
4091 &cstate
->session
->se_client
->cl_clientid
,
4092 sizeof(clientid_t
));
4094 status
= nfserr_stale_clientid
;
4095 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4098 /* validate and update open stateid and open seqid */
4099 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4100 lock
->lk_new_open_seqid
,
4101 &lock
->lk_new_open_stateid
,
4105 open_sop
= openowner(open_stp
->st_stateowner
);
4106 status
= nfserr_bad_stateid
;
4107 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4108 &lock
->v
.new.clientid
))
4110 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4111 &lock_stp
, &new_state
);
4113 status
= nfs4_preprocess_seqid_op(cstate
,
4114 lock
->lk_old_lock_seqid
,
4115 &lock
->lk_old_lock_stateid
,
4116 NFS4_LOCK_STID
, &lock_stp
);
4119 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4121 lkflg
= setlkflg(lock
->lk_type
);
4122 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4126 status
= nfserr_grace
;
4127 if (locks_in_grace(SVC_NET(rqstp
)) && !lock
->lk_reclaim
)
4129 status
= nfserr_no_grace
;
4130 if (!locks_in_grace(SVC_NET(rqstp
)) && lock
->lk_reclaim
)
4133 file_lock
= locks_alloc_lock();
4135 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4136 status
= nfserr_jukebox
;
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
;
4169 file_lock
->fl_start
= lock
->lk_offset
;
4170 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4171 nfs4_transform_lock_offset(file_lock
);
4173 conflock
= locks_alloc_lock();
4175 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4176 status
= nfserr_jukebox
;
4180 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4182 case 0: /* success! */
4183 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4184 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4188 case (EAGAIN
): /* conflock holds conflicting lock */
4189 status
= nfserr_denied
;
4190 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4191 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4194 status
= nfserr_deadlock
;
4197 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4198 status
= nfserrno(err
);
4202 if (status
&& new_state
)
4203 release_lockowner(lock_sop
);
4204 if (!cstate
->replay_owner
)
4205 nfs4_unlock_state();
4207 locks_free_lock(file_lock
);
4209 locks_free_lock(conflock
);
4214 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4215 * so we do a temporary open here just to get an open file to pass to
4216 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4219 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4222 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4224 err
= nfserrno(vfs_test_lock(file
, lock
));
4234 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4235 struct nfsd4_lockt
*lockt
)
4237 struct inode
*inode
;
4238 struct file_lock
*file_lock
= NULL
;
4239 struct nfs4_lockowner
*lo
;
4241 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4243 if (locks_in_grace(SVC_NET(rqstp
)))
4244 return nfserr_grace
;
4246 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4247 return nfserr_inval
;
4251 status
= nfserr_stale_clientid
;
4252 if (!nfsd4_has_session(cstate
) && STALE_CLIENTID(&lockt
->lt_clientid
, nn
))
4255 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4258 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4259 file_lock
= locks_alloc_lock();
4261 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4262 status
= nfserr_jukebox
;
4265 locks_init_lock(file_lock
);
4266 switch (lockt
->lt_type
) {
4269 file_lock
->fl_type
= F_RDLCK
;
4272 case NFS4_WRITEW_LT
:
4273 file_lock
->fl_type
= F_WRLCK
;
4276 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4277 status
= nfserr_inval
;
4281 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
);
4283 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4284 file_lock
->fl_pid
= current
->tgid
;
4285 file_lock
->fl_flags
= FL_POSIX
;
4287 file_lock
->fl_start
= lockt
->lt_offset
;
4288 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4290 nfs4_transform_lock_offset(file_lock
);
4292 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4296 if (file_lock
->fl_type
!= F_UNLCK
) {
4297 status
= nfserr_denied
;
4298 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4301 nfs4_unlock_state();
4303 locks_free_lock(file_lock
);
4308 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4309 struct nfsd4_locku
*locku
)
4311 struct nfs4_ol_stateid
*stp
;
4312 struct file
*filp
= NULL
;
4313 struct file_lock
*file_lock
= NULL
;
4317 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4318 (long long) locku
->lu_offset
,
4319 (long long) locku
->lu_length
);
4321 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4322 return nfserr_inval
;
4326 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4327 &locku
->lu_stateid
, NFS4_LOCK_STID
, &stp
);
4330 filp
= find_any_file(stp
->st_file
);
4332 status
= nfserr_lock_range
;
4335 file_lock
= locks_alloc_lock();
4337 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4338 status
= nfserr_jukebox
;
4341 locks_init_lock(file_lock
);
4342 file_lock
->fl_type
= F_UNLCK
;
4343 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4344 file_lock
->fl_pid
= current
->tgid
;
4345 file_lock
->fl_file
= filp
;
4346 file_lock
->fl_flags
= FL_POSIX
;
4347 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4348 file_lock
->fl_start
= locku
->lu_offset
;
4350 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4352 nfs4_transform_lock_offset(file_lock
);
4355 * Try to unlock the file in the VFS.
4357 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4359 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4363 * OK, unlock succeeded; the only thing left to do is update the stateid.
4365 update_stateid(&stp
->st_stid
.sc_stateid
);
4366 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4369 if (!cstate
->replay_owner
)
4370 nfs4_unlock_state();
4372 locks_free_lock(file_lock
);
4376 status
= nfserrno(err
);
4382 * 1: locks held by lockowner
4383 * 0: no locks held by lockowner
4386 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4388 struct file_lock
**flpp
;
4389 struct inode
*inode
= filp
->fi_inode
;
4393 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4394 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4405 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4406 struct nfsd4_compound_state
*cstate
,
4407 struct nfsd4_release_lockowner
*rlockowner
)
4409 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4410 struct nfs4_stateowner
*sop
;
4411 struct nfs4_lockowner
*lo
;
4412 struct nfs4_ol_stateid
*stp
;
4413 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4414 struct list_head matches
;
4415 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4417 struct nfsd_net
*nn
= net_generic(&init_net
, nfsd_net_id
);
4419 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4420 clid
->cl_boot
, clid
->cl_id
);
4422 /* XXX check for lease expiration */
4424 status
= nfserr_stale_clientid
;
4425 if (STALE_CLIENTID(clid
, nn
))
4430 status
= nfserr_locks_held
;
4431 INIT_LIST_HEAD(&matches
);
4433 list_for_each_entry(sop
, &ownerstr_hashtbl
[hashval
], so_strhash
) {
4434 if (sop
->so_is_open_owner
)
4436 if (!same_owner_str(sop
, owner
, clid
))
4438 list_for_each_entry(stp
, &sop
->so_stateids
,
4440 lo
= lockowner(sop
);
4441 if (check_for_locks(stp
->st_file
, lo
))
4443 list_add(&lo
->lo_list
, &matches
);
4446 /* Clients probably won't expect us to return with some (but not all)
4447 * of the lockowner state released; so don't release any until all
4448 * have been checked. */
4450 while (!list_empty(&matches
)) {
4451 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4453 /* unhash_stateowner deletes so_perclient only
4454 * for openowners. */
4455 list_del(&lo
->lo_list
);
4456 release_lockowner(lo
);
4459 nfs4_unlock_state();
4463 static inline struct nfs4_client_reclaim
*
4466 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4470 nfs4_has_reclaimed_state(const char *name
, bool use_exchange_id
)
4472 unsigned int strhashval
= clientstr_hashval(name
);
4473 struct nfs4_client
*clp
;
4475 clp
= find_confirmed_client_by_str(name
, strhashval
);
4478 return test_bit(NFSD4_CLIENT_STABLE
, &clp
->cl_flags
);
4482 * failure => all reset bets are off, nfserr_no_grace...
4485 nfs4_client_to_reclaim(const char *name
)
4487 unsigned int strhashval
;
4488 struct nfs4_client_reclaim
*crp
= NULL
;
4490 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4491 crp
= alloc_reclaim();
4494 strhashval
= clientstr_hashval(name
);
4495 INIT_LIST_HEAD(&crp
->cr_strhash
);
4496 list_add(&crp
->cr_strhash
, &reclaim_str_hashtbl
[strhashval
]);
4497 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4498 reclaim_str_hashtbl_size
++;
4503 nfs4_release_reclaim(void)
4505 struct nfs4_client_reclaim
*crp
= NULL
;
4508 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4509 while (!list_empty(&reclaim_str_hashtbl
[i
])) {
4510 crp
= list_entry(reclaim_str_hashtbl
[i
].next
,
4511 struct nfs4_client_reclaim
, cr_strhash
);
4512 list_del(&crp
->cr_strhash
);
4514 reclaim_str_hashtbl_size
--;
4517 BUG_ON(reclaim_str_hashtbl_size
);
4521 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4522 struct nfs4_client_reclaim
*
4523 nfsd4_find_reclaim_client(struct nfs4_client
*clp
)
4525 unsigned int strhashval
;
4526 struct nfs4_client_reclaim
*crp
= NULL
;
4528 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
4529 clp
->cl_name
.len
, clp
->cl_name
.data
,
4532 /* find clp->cl_name in reclaim_str_hashtbl */
4533 strhashval
= clientstr_hashval(clp
->cl_recdir
);
4534 list_for_each_entry(crp
, &reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4535 if (same_name(crp
->cr_recdir
, clp
->cl_recdir
)) {
4543 * Called from OPEN. Look for clientid in reclaim list.
4546 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
)
4548 struct nfs4_client
*clp
;
4550 /* find clientid in conf_id_hashtbl */
4551 clp
= find_confirmed_client(clid
, sessions
);
4553 return nfserr_reclaim_bad
;
4555 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4558 #ifdef CONFIG_NFSD_FAULT_INJECTION
4560 void nfsd_forget_clients(u64 num
)
4562 struct nfs4_client
*clp
, *next
;
4566 list_for_each_entry_safe(clp
, next
, &client_lru
, cl_lru
) {
4571 nfs4_unlock_state();
4573 printk(KERN_INFO
"NFSD: Forgot %d clients", count
);
4576 static void release_lockowner_sop(struct nfs4_stateowner
*sop
)
4578 release_lockowner(lockowner(sop
));
4581 static void release_openowner_sop(struct nfs4_stateowner
*sop
)
4583 release_openowner(openowner(sop
));
4586 static int nfsd_release_n_owners(u64 num
, bool is_open_owner
,
4587 void (*release_sop
)(struct nfs4_stateowner
*))
4590 struct nfs4_stateowner
*sop
, *next
;
4592 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4593 list_for_each_entry_safe(sop
, next
, &ownerstr_hashtbl
[i
], so_strhash
) {
4594 if (sop
->so_is_open_owner
!= is_open_owner
)
4604 void nfsd_forget_locks(u64 num
)
4609 count
= nfsd_release_n_owners(num
, false, release_lockowner_sop
);
4610 nfs4_unlock_state();
4612 printk(KERN_INFO
"NFSD: Forgot %d locks", count
);
4615 void nfsd_forget_openowners(u64 num
)
4620 count
= nfsd_release_n_owners(num
, true, release_openowner_sop
);
4621 nfs4_unlock_state();
4623 printk(KERN_INFO
"NFSD: Forgot %d open owners", count
);
4626 static int nfsd_process_n_delegations(u64 num
, struct list_head
*list
)
4629 struct nfs4_file
*fp
, *fnext
;
4630 struct nfs4_delegation
*dp
, *dnext
;
4632 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4633 list_for_each_entry_safe(fp
, fnext
, &file_hashtbl
[i
], fi_hash
) {
4634 list_for_each_entry_safe(dp
, dnext
, &fp
->fi_delegations
, dl_perfile
) {
4635 list_move(&dp
->dl_recall_lru
, list
);
4645 void nfsd_forget_delegations(u64 num
)
4649 struct nfs4_delegation
*dp
, *dnext
;
4651 spin_lock(&recall_lock
);
4652 count
= nfsd_process_n_delegations(num
, &victims
);
4653 spin_unlock(&recall_lock
);
4656 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
)
4657 unhash_delegation(dp
);
4658 nfs4_unlock_state();
4660 printk(KERN_INFO
"NFSD: Forgot %d delegations", count
);
4663 void nfsd_recall_delegations(u64 num
)
4667 struct nfs4_delegation
*dp
, *dnext
;
4669 spin_lock(&recall_lock
);
4670 count
= nfsd_process_n_delegations(num
, &victims
);
4671 list_for_each_entry_safe(dp
, dnext
, &victims
, dl_recall_lru
) {
4672 list_del(&dp
->dl_recall_lru
);
4673 nfsd_break_one_deleg(dp
);
4675 spin_unlock(&recall_lock
);
4677 printk(KERN_INFO
"NFSD: Recalled %d delegations", count
);
4680 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4682 /* initialization to perform at module load time: */
4685 nfs4_state_init(void)
4689 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4690 INIT_LIST_HEAD(&conf_id_hashtbl
[i
]);
4691 INIT_LIST_HEAD(&conf_str_hashtbl
[i
]);
4692 INIT_LIST_HEAD(&unconf_str_hashtbl
[i
]);
4693 INIT_LIST_HEAD(&unconf_id_hashtbl
[i
]);
4694 INIT_LIST_HEAD(&reclaim_str_hashtbl
[i
]);
4696 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4697 INIT_LIST_HEAD(&sessionid_hashtbl
[i
]);
4698 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4699 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4701 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++) {
4702 INIT_LIST_HEAD(&ownerstr_hashtbl
[i
]);
4704 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4705 INIT_LIST_HEAD(&lockowner_ino_hashtbl
[i
]);
4706 INIT_LIST_HEAD(&close_lru
);
4707 INIT_LIST_HEAD(&client_lru
);
4708 INIT_LIST_HEAD(&del_recall_lru
);
4709 reclaim_str_hashtbl_size
= 0;
4713 * Since the lifetime of a delegation isn't limited to that of an open, a
4714 * client may quite reasonably hang on to a delegation as long as it has
4715 * the inode cached. This becomes an obvious problem the first time a
4716 * client's inode cache approaches the size of the server's total memory.
4718 * For now we avoid this problem by imposing a hard limit on the number
4719 * of delegations, which varies according to the server's memory size.
4722 set_max_delegations(void)
4725 * Allow at most 4 delegations per megabyte of RAM. Quick
4726 * estimates suggest that in the worst case (where every delegation
4727 * is for a different inode), a delegation could take about 1.5K,
4728 * giving a worst case usage of about 6% of memory.
4730 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4733 /* initialization to perform when the nfsd service is started: */
4736 nfs4_state_start(void)
4738 struct net
*net
= &init_net
;
4739 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4743 * FIXME: For now, we hang most of the pernet global stuff off of
4744 * init_net until nfsd is fully containerized. Eventually, we'll
4745 * need to pass a net pointer into this function, take a reference
4746 * to that instead and then do most of the rest of this on a per-net
4750 nfsd4_client_tracking_init(net
);
4751 nn
->boot_time
= get_seconds();
4752 locks_start_grace(net
, &nn
->nfsd4_manager
);
4753 nn
->grace_ended
= false;
4754 printk(KERN_INFO
"NFSD: starting %ld-second grace period\n",
4756 ret
= set_callback_cred();
4761 laundry_wq
= create_singlethread_workqueue("nfsd4");
4762 if (laundry_wq
== NULL
) {
4766 ret
= nfsd4_create_callback_queue();
4768 goto out_free_laundry
;
4769 queue_delayed_work(laundry_wq
, &laundromat_work
, nfsd4_grace
* HZ
);
4770 set_max_delegations();
4773 destroy_workqueue(laundry_wq
);
4775 nfsd4_client_tracking_exit(net
);
4781 __nfs4_state_shutdown(void)
4784 struct nfs4_client
*clp
= NULL
;
4785 struct nfs4_delegation
*dp
= NULL
;
4786 struct list_head
*pos
, *next
, reaplist
;
4788 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4789 while (!list_empty(&conf_id_hashtbl
[i
])) {
4790 clp
= list_entry(conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4791 destroy_client(clp
);
4793 while (!list_empty(&unconf_str_hashtbl
[i
])) {
4794 clp
= list_entry(unconf_str_hashtbl
[i
].next
, struct nfs4_client
, cl_strhash
);
4795 destroy_client(clp
);
4798 INIT_LIST_HEAD(&reaplist
);
4799 spin_lock(&recall_lock
);
4800 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4801 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4802 list_move(&dp
->dl_recall_lru
, &reaplist
);
4804 spin_unlock(&recall_lock
);
4805 list_for_each_safe(pos
, next
, &reaplist
) {
4806 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4807 unhash_delegation(dp
);
4810 nfsd4_client_tracking_exit(&init_net
);
4815 nfs4_state_shutdown(void)
4817 struct net
*net
= &init_net
;
4818 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4820 cancel_delayed_work_sync(&laundromat_work
);
4821 destroy_workqueue(laundry_wq
);
4822 locks_end_grace(&nn
->nfsd4_manager
);
4824 __nfs4_state_shutdown();
4825 nfs4_unlock_state();
4826 nfsd4_destroy_callback_queue();
4830 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4832 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
4833 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
4837 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
4839 if (cstate
->minorversion
) {
4840 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
4841 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4846 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
4848 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
4852 * functions to set current state id
4855 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4857 put_stateid(cstate
, &odp
->od_stateid
);
4861 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
4863 put_stateid(cstate
, &open
->op_stateid
);
4867 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4869 put_stateid(cstate
, &close
->cl_stateid
);
4873 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
4875 put_stateid(cstate
, &lock
->lk_resp_stateid
);
4879 * functions to consume current state id
4883 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
4885 get_stateid(cstate
, &odp
->od_stateid
);
4889 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
4891 get_stateid(cstate
, &drp
->dr_stateid
);
4895 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
4897 get_stateid(cstate
, &fsp
->fr_stateid
);
4901 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
4903 get_stateid(cstate
, &setattr
->sa_stateid
);
4907 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
4909 get_stateid(cstate
, &close
->cl_stateid
);
4913 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
4915 get_stateid(cstate
, &locku
->lu_stateid
);
4919 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
4921 get_stateid(cstate
, &read
->rd_stateid
);
4925 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
4927 get_stateid(cstate
, &write
->wr_stateid
);