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"
50 #define NFSDDBG_FACILITY NFSDDBG_PROC
52 #define all_ones {{~0,~0},~0}
53 static const stateid_t one_stateid
= {
55 .si_opaque
= all_ones
,
57 static const stateid_t zero_stateid
= {
60 static const stateid_t currentstateid
= {
64 static u64 current_sessionid
= 1;
66 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
67 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
68 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static int check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
);
75 /* Currently used for almost all code touching nfsv4 state: */
76 static DEFINE_MUTEX(client_mutex
);
79 * Currently used for the del_recall_lru and file hash table. In an
80 * effort to decrease the scope of the client_mutex, this spinlock may
81 * eventually cover more:
83 static DEFINE_SPINLOCK(recall_lock
);
85 static struct kmem_cache
*openowner_slab
= NULL
;
86 static struct kmem_cache
*lockowner_slab
= NULL
;
87 static struct kmem_cache
*file_slab
= NULL
;
88 static struct kmem_cache
*stateid_slab
= NULL
;
89 static struct kmem_cache
*deleg_slab
= NULL
;
94 mutex_lock(&client_mutex
);
97 static void free_session(struct kref
*);
99 /* Must be called under the client_lock */
100 static void nfsd4_put_session_locked(struct nfsd4_session
*ses
)
102 kref_put(&ses
->se_ref
, free_session
);
105 static void nfsd4_get_session(struct nfsd4_session
*ses
)
107 kref_get(&ses
->se_ref
);
111 nfs4_unlock_state(void)
113 mutex_unlock(&client_mutex
);
117 opaque_hashval(const void *ptr
, int nbytes
)
119 unsigned char *cptr
= (unsigned char *) ptr
;
129 static struct list_head del_recall_lru
;
131 static void nfsd4_free_file(struct nfs4_file
*f
)
133 kmem_cache_free(file_slab
, f
);
137 put_nfs4_file(struct nfs4_file
*fi
)
139 if (atomic_dec_and_lock(&fi
->fi_ref
, &recall_lock
)) {
140 list_del(&fi
->fi_hash
);
141 spin_unlock(&recall_lock
);
148 get_nfs4_file(struct nfs4_file
*fi
)
150 atomic_inc(&fi
->fi_ref
);
153 static int num_delegations
;
154 unsigned int max_delegations
;
157 * Open owner state (share locks)
160 /* hash tables for lock and open owners */
161 #define OWNER_HASH_BITS 8
162 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
163 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
165 static unsigned int ownerstr_hashval(u32 clientid
, struct xdr_netobj
*ownername
)
169 ret
= opaque_hashval(ownername
->data
, ownername
->len
);
171 return ret
& OWNER_HASH_MASK
;
174 /* hash table for nfs4_file */
175 #define FILE_HASH_BITS 8
176 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
178 static unsigned int file_hashval(struct inode
*ino
)
180 /* XXX: why are we hashing on inode pointer, anyway? */
181 return hash_ptr(ino
, FILE_HASH_BITS
);
184 static struct list_head file_hashtbl
[FILE_HASH_SIZE
];
186 static void __nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
188 WARN_ON_ONCE(!(fp
->fi_fds
[oflag
] || fp
->fi_fds
[O_RDWR
]));
189 atomic_inc(&fp
->fi_access
[oflag
]);
192 static void nfs4_file_get_access(struct nfs4_file
*fp
, int oflag
)
194 if (oflag
== O_RDWR
) {
195 __nfs4_file_get_access(fp
, O_RDONLY
);
196 __nfs4_file_get_access(fp
, O_WRONLY
);
198 __nfs4_file_get_access(fp
, oflag
);
201 static void nfs4_file_put_fd(struct nfs4_file
*fp
, int oflag
)
203 if (fp
->fi_fds
[oflag
]) {
204 fput(fp
->fi_fds
[oflag
]);
205 fp
->fi_fds
[oflag
] = NULL
;
209 static void __nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
211 if (atomic_dec_and_test(&fp
->fi_access
[oflag
])) {
212 nfs4_file_put_fd(fp
, oflag
);
214 * It's also safe to get rid of the RDWR open *if*
215 * we no longer have need of the other kind of access
216 * or if we already have the other kind of open:
218 if (fp
->fi_fds
[1-oflag
]
219 || atomic_read(&fp
->fi_access
[1 - oflag
]) == 0)
220 nfs4_file_put_fd(fp
, O_RDWR
);
224 static void nfs4_file_put_access(struct nfs4_file
*fp
, int oflag
)
226 if (oflag
== O_RDWR
) {
227 __nfs4_file_put_access(fp
, O_RDONLY
);
228 __nfs4_file_put_access(fp
, O_WRONLY
);
230 __nfs4_file_put_access(fp
, oflag
);
233 static inline int get_new_stid(struct nfs4_stid
*stid
)
235 static int min_stateid
= 0;
236 struct idr
*stateids
= &stid
->sc_client
->cl_stateids
;
240 error
= idr_get_new_above(stateids
, stid
, min_stateid
, &new_stid
);
242 * Note: the necessary preallocation was done in
243 * nfs4_alloc_stateid(). The idr code caps the number of
244 * preallocations that can exist at a time, but the state lock
245 * prevents anyone from using ours before we get here:
249 * It shouldn't be a problem to reuse an opaque stateid value.
250 * I don't think it is for 4.1. But with 4.0 I worry that, for
251 * example, a stray write retransmission could be accepted by
252 * the server when it should have been rejected. Therefore,
253 * adopt a trick from the sctp code to attempt to maximize the
254 * amount of time until an id is reused, by ensuring they always
255 * "increase" (mod INT_MAX):
258 min_stateid
= new_stid
+1;
259 if (min_stateid
== INT_MAX
)
264 static void init_stid(struct nfs4_stid
*stid
, struct nfs4_client
*cl
, unsigned char type
)
266 stateid_t
*s
= &stid
->sc_stateid
;
269 stid
->sc_type
= type
;
270 stid
->sc_client
= cl
;
271 s
->si_opaque
.so_clid
= cl
->cl_clientid
;
272 new_id
= get_new_stid(stid
);
273 s
->si_opaque
.so_id
= (u32
)new_id
;
274 /* Will be incremented before return to client: */
275 s
->si_generation
= 0;
278 static struct nfs4_stid
*nfs4_alloc_stid(struct nfs4_client
*cl
, struct kmem_cache
*slab
)
280 struct idr
*stateids
= &cl
->cl_stateids
;
282 if (!idr_pre_get(stateids
, GFP_KERNEL
))
285 * Note: if we fail here (or any time between now and the time
286 * we actually get the new idr), we won't need to undo the idr
287 * preallocation, since the idr code caps the number of
288 * preallocated entries.
290 return kmem_cache_alloc(slab
, GFP_KERNEL
);
293 static struct nfs4_ol_stateid
* nfs4_alloc_stateid(struct nfs4_client
*clp
)
295 return openlockstateid(nfs4_alloc_stid(clp
, stateid_slab
));
298 static struct nfs4_delegation
*
299 alloc_init_deleg(struct nfs4_client
*clp
, struct nfs4_ol_stateid
*stp
, struct svc_fh
*current_fh
, u32 type
)
301 struct nfs4_delegation
*dp
;
302 struct nfs4_file
*fp
= stp
->st_file
;
304 dprintk("NFSD alloc_init_deleg\n");
306 * Major work on the lease subsystem (for example, to support
307 * calbacks on stat) will be required before we can support
308 * write delegations properly.
310 if (type
!= NFS4_OPEN_DELEGATE_READ
)
312 if (fp
->fi_had_conflict
)
314 if (num_delegations
> max_delegations
)
316 dp
= delegstateid(nfs4_alloc_stid(clp
, deleg_slab
));
319 init_stid(&dp
->dl_stid
, clp
, NFS4_DELEG_STID
);
321 * delegation seqid's are never incremented. The 4.1 special
322 * meaning of seqid 0 isn't meaningful, really, but let's avoid
323 * 0 anyway just for consistency and use 1:
325 dp
->dl_stid
.sc_stateid
.si_generation
= 1;
327 INIT_LIST_HEAD(&dp
->dl_perfile
);
328 INIT_LIST_HEAD(&dp
->dl_perclnt
);
329 INIT_LIST_HEAD(&dp
->dl_recall_lru
);
333 fh_copy_shallow(&dp
->dl_fh
, ¤t_fh
->fh_handle
);
335 atomic_set(&dp
->dl_count
, 1);
336 nfsd4_init_callback(&dp
->dl_recall
);
341 nfs4_put_delegation(struct nfs4_delegation
*dp
)
343 if (atomic_dec_and_test(&dp
->dl_count
)) {
344 dprintk("NFSD: freeing dp %p\n",dp
);
345 put_nfs4_file(dp
->dl_file
);
346 kmem_cache_free(deleg_slab
, dp
);
351 static void nfs4_put_deleg_lease(struct nfs4_file
*fp
)
353 if (atomic_dec_and_test(&fp
->fi_delegees
)) {
354 vfs_setlease(fp
->fi_deleg_file
, F_UNLCK
, &fp
->fi_lease
);
356 fput(fp
->fi_deleg_file
);
357 fp
->fi_deleg_file
= NULL
;
361 static void unhash_stid(struct nfs4_stid
*s
)
363 struct idr
*stateids
= &s
->sc_client
->cl_stateids
;
365 idr_remove(stateids
, s
->sc_stateid
.si_opaque
.so_id
);
368 /* Called under the state lock. */
370 unhash_delegation(struct nfs4_delegation
*dp
)
372 unhash_stid(&dp
->dl_stid
);
373 list_del_init(&dp
->dl_perclnt
);
374 spin_lock(&recall_lock
);
375 list_del_init(&dp
->dl_perfile
);
376 list_del_init(&dp
->dl_recall_lru
);
377 spin_unlock(&recall_lock
);
378 nfs4_put_deleg_lease(dp
->dl_file
);
379 nfs4_put_delegation(dp
);
386 static unsigned int clientid_hashval(u32 id
)
388 return id
& CLIENT_HASH_MASK
;
391 static unsigned int clientstr_hashval(const char *name
)
393 return opaque_hashval(name
, 8) & CLIENT_HASH_MASK
;
397 * We store the NONE, READ, WRITE, and BOTH bits separately in the
398 * st_{access,deny}_bmap field of the stateid, in order to track not
399 * only what share bits are currently in force, but also what
400 * combinations of share bits previous opens have used. This allows us
401 * to enforce the recommendation of rfc 3530 14.2.19 that the server
402 * return an error if the client attempt to downgrade to a combination
403 * of share bits not explicable by closing some of its previous opens.
405 * XXX: This enforcement is actually incomplete, since we don't keep
406 * track of access/deny bit combinations; so, e.g., we allow:
408 * OPEN allow read, deny write
409 * OPEN allow both, deny none
410 * DOWNGRADE allow read, deny none
412 * which we should reject.
415 bmap_to_share_mode(unsigned long bmap
) {
417 unsigned int access
= 0;
419 for (i
= 1; i
< 4; i
++) {
420 if (test_bit(i
, &bmap
))
427 test_share(struct nfs4_ol_stateid
*stp
, struct nfsd4_open
*open
) {
428 unsigned int access
, deny
;
430 access
= bmap_to_share_mode(stp
->st_access_bmap
);
431 deny
= bmap_to_share_mode(stp
->st_deny_bmap
);
432 if ((access
& open
->op_share_deny
) || (deny
& open
->op_share_access
))
437 /* set share access for a given stateid */
439 set_access(u32 access
, struct nfs4_ol_stateid
*stp
)
441 __set_bit(access
, &stp
->st_access_bmap
);
444 /* clear share access for a given stateid */
446 clear_access(u32 access
, struct nfs4_ol_stateid
*stp
)
448 __clear_bit(access
, &stp
->st_access_bmap
);
451 /* test whether a given stateid has access */
453 test_access(u32 access
, struct nfs4_ol_stateid
*stp
)
455 return test_bit(access
, &stp
->st_access_bmap
);
458 /* set share deny for a given stateid */
460 set_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
462 __set_bit(access
, &stp
->st_deny_bmap
);
465 /* clear share deny for a given stateid */
467 clear_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
469 __clear_bit(access
, &stp
->st_deny_bmap
);
472 /* test whether a given stateid is denying specific access */
474 test_deny(u32 access
, struct nfs4_ol_stateid
*stp
)
476 return test_bit(access
, &stp
->st_deny_bmap
);
479 static int nfs4_access_to_omode(u32 access
)
481 switch (access
& NFS4_SHARE_ACCESS_BOTH
) {
482 case NFS4_SHARE_ACCESS_READ
:
484 case NFS4_SHARE_ACCESS_WRITE
:
486 case NFS4_SHARE_ACCESS_BOTH
:
493 /* release all access and file references for a given stateid */
495 release_all_access(struct nfs4_ol_stateid
*stp
)
499 for (i
= 1; i
< 4; i
++) {
500 if (test_access(i
, stp
))
501 nfs4_file_put_access(stp
->st_file
,
502 nfs4_access_to_omode(i
));
503 clear_access(i
, stp
);
507 static void unhash_generic_stateid(struct nfs4_ol_stateid
*stp
)
509 list_del(&stp
->st_perfile
);
510 list_del(&stp
->st_perstateowner
);
513 static void close_generic_stateid(struct nfs4_ol_stateid
*stp
)
515 release_all_access(stp
);
516 put_nfs4_file(stp
->st_file
);
520 static void free_generic_stateid(struct nfs4_ol_stateid
*stp
)
522 kmem_cache_free(stateid_slab
, stp
);
525 static void release_lock_stateid(struct nfs4_ol_stateid
*stp
)
529 unhash_generic_stateid(stp
);
530 unhash_stid(&stp
->st_stid
);
531 file
= find_any_file(stp
->st_file
);
533 locks_remove_posix(file
, (fl_owner_t
)lockowner(stp
->st_stateowner
));
534 close_generic_stateid(stp
);
535 free_generic_stateid(stp
);
538 static void unhash_lockowner(struct nfs4_lockowner
*lo
)
540 struct nfs4_ol_stateid
*stp
;
542 list_del(&lo
->lo_owner
.so_strhash
);
543 list_del(&lo
->lo_perstateid
);
544 list_del(&lo
->lo_owner_ino_hash
);
545 while (!list_empty(&lo
->lo_owner
.so_stateids
)) {
546 stp
= list_first_entry(&lo
->lo_owner
.so_stateids
,
547 struct nfs4_ol_stateid
, st_perstateowner
);
548 release_lock_stateid(stp
);
552 static void release_lockowner(struct nfs4_lockowner
*lo
)
554 unhash_lockowner(lo
);
555 nfs4_free_lockowner(lo
);
559 release_stateid_lockowners(struct nfs4_ol_stateid
*open_stp
)
561 struct nfs4_lockowner
*lo
;
563 while (!list_empty(&open_stp
->st_lockowners
)) {
564 lo
= list_entry(open_stp
->st_lockowners
.next
,
565 struct nfs4_lockowner
, lo_perstateid
);
566 release_lockowner(lo
);
570 static void unhash_open_stateid(struct nfs4_ol_stateid
*stp
)
572 unhash_generic_stateid(stp
);
573 release_stateid_lockowners(stp
);
574 close_generic_stateid(stp
);
577 static void release_open_stateid(struct nfs4_ol_stateid
*stp
)
579 unhash_open_stateid(stp
);
580 unhash_stid(&stp
->st_stid
);
581 free_generic_stateid(stp
);
584 static void unhash_openowner(struct nfs4_openowner
*oo
)
586 struct nfs4_ol_stateid
*stp
;
588 list_del(&oo
->oo_owner
.so_strhash
);
589 list_del(&oo
->oo_perclient
);
590 while (!list_empty(&oo
->oo_owner
.so_stateids
)) {
591 stp
= list_first_entry(&oo
->oo_owner
.so_stateids
,
592 struct nfs4_ol_stateid
, st_perstateowner
);
593 release_open_stateid(stp
);
597 static void release_last_closed_stateid(struct nfs4_openowner
*oo
)
599 struct nfs4_ol_stateid
*s
= oo
->oo_last_closed_stid
;
602 unhash_stid(&s
->st_stid
);
603 free_generic_stateid(s
);
604 oo
->oo_last_closed_stid
= NULL
;
608 static void release_openowner(struct nfs4_openowner
*oo
)
610 unhash_openowner(oo
);
611 list_del(&oo
->oo_close_lru
);
612 release_last_closed_stateid(oo
);
613 nfs4_free_openowner(oo
);
617 hash_sessionid(struct nfs4_sessionid
*sessionid
)
619 struct nfsd4_sessionid
*sid
= (struct nfsd4_sessionid
*)sessionid
;
621 return sid
->sequence
% SESSION_HASH_SIZE
;
626 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
628 u32
*ptr
= (u32
*)(&sessionid
->data
[0]);
629 dprintk("%s: %u:%u:%u:%u\n", fn
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
633 dump_sessionid(const char *fn
, struct nfs4_sessionid
*sessionid
)
640 gen_sessionid(struct nfsd4_session
*ses
)
642 struct nfs4_client
*clp
= ses
->se_client
;
643 struct nfsd4_sessionid
*sid
;
645 sid
= (struct nfsd4_sessionid
*)ses
->se_sessionid
.data
;
646 sid
->clientid
= clp
->cl_clientid
;
647 sid
->sequence
= current_sessionid
++;
652 * The protocol defines ca_maxresponssize_cached to include the size of
653 * the rpc header, but all we need to cache is the data starting after
654 * the end of the initial SEQUENCE operation--the rest we regenerate
655 * each time. Therefore we can advertise a ca_maxresponssize_cached
656 * value that is the number of bytes in our cache plus a few additional
657 * bytes. In order to stay on the safe side, and not promise more than
658 * we can cache, those additional bytes must be the minimum possible: 24
659 * bytes of rpc header (xid through accept state, with AUTH_NULL
660 * verifier), 12 for the compound header (with zero-length tag), and 44
661 * for the SEQUENCE op response:
663 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
666 free_session_slots(struct nfsd4_session
*ses
)
670 for (i
= 0; i
< ses
->se_fchannel
.maxreqs
; i
++)
671 kfree(ses
->se_slots
[i
]);
675 * We don't actually need to cache the rpc and session headers, so we
676 * can allocate a little less for each slot:
678 static inline int slot_bytes(struct nfsd4_channel_attrs
*ca
)
680 return ca
->maxresp_cached
- NFSD_MIN_HDR_SEQ_SZ
;
683 static int nfsd4_sanitize_slot_size(u32 size
)
685 size
-= NFSD_MIN_HDR_SEQ_SZ
; /* We don't cache the rpc header */
686 size
= min_t(u32
, size
, NFSD_SLOT_CACHE_SIZE
);
692 * XXX: If we run out of reserved DRC memory we could (up to a point)
693 * re-negotiate active sessions and reduce their slot usage to make
694 * room for new connections. For now we just fail the create session.
696 static int nfsd4_get_drc_mem(int slotsize
, u32 num
)
700 num
= min_t(u32
, num
, NFSD_MAX_SLOTS_PER_SESSION
);
702 spin_lock(&nfsd_drc_lock
);
703 avail
= min_t(int, NFSD_MAX_MEM_PER_SESSION
,
704 nfsd_drc_max_mem
- nfsd_drc_mem_used
);
705 num
= min_t(int, num
, avail
/ slotsize
);
706 nfsd_drc_mem_used
+= num
* slotsize
;
707 spin_unlock(&nfsd_drc_lock
);
712 static void nfsd4_put_drc_mem(int slotsize
, int num
)
714 spin_lock(&nfsd_drc_lock
);
715 nfsd_drc_mem_used
-= slotsize
* num
;
716 spin_unlock(&nfsd_drc_lock
);
719 static struct nfsd4_session
*__alloc_session(int slotsize
, int numslots
)
721 struct nfsd4_session
*new;
724 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION
* sizeof(struct nfsd4_slot
*)
725 + sizeof(struct nfsd4_session
) > PAGE_SIZE
);
726 mem
= numslots
* sizeof(struct nfsd4_slot
*);
728 new = kzalloc(sizeof(*new) + mem
, GFP_KERNEL
);
731 /* allocate each struct nfsd4_slot and data cache in one piece */
732 for (i
= 0; i
< numslots
; i
++) {
733 mem
= sizeof(struct nfsd4_slot
) + slotsize
;
734 new->se_slots
[i
] = kzalloc(mem
, GFP_KERNEL
);
735 if (!new->se_slots
[i
])
741 kfree(new->se_slots
[i
]);
746 static void init_forechannel_attrs(struct nfsd4_channel_attrs
*new, struct nfsd4_channel_attrs
*req
, int numslots
, int slotsize
)
748 u32 maxrpc
= nfsd_serv
->sv_max_mesg
;
750 new->maxreqs
= numslots
;
751 new->maxresp_cached
= min_t(u32
, req
->maxresp_cached
,
752 slotsize
+ NFSD_MIN_HDR_SEQ_SZ
);
753 new->maxreq_sz
= min_t(u32
, req
->maxreq_sz
, maxrpc
);
754 new->maxresp_sz
= min_t(u32
, req
->maxresp_sz
, maxrpc
);
755 new->maxops
= min_t(u32
, req
->maxops
, NFSD_MAX_OPS_PER_COMPOUND
);
758 static void free_conn(struct nfsd4_conn
*c
)
760 svc_xprt_put(c
->cn_xprt
);
764 static void nfsd4_conn_lost(struct svc_xpt_user
*u
)
766 struct nfsd4_conn
*c
= container_of(u
, struct nfsd4_conn
, cn_xpt_user
);
767 struct nfs4_client
*clp
= c
->cn_session
->se_client
;
769 spin_lock(&clp
->cl_lock
);
770 if (!list_empty(&c
->cn_persession
)) {
771 list_del(&c
->cn_persession
);
774 spin_unlock(&clp
->cl_lock
);
775 nfsd4_probe_callback(clp
);
778 static struct nfsd4_conn
*alloc_conn(struct svc_rqst
*rqstp
, u32 flags
)
780 struct nfsd4_conn
*conn
;
782 conn
= kmalloc(sizeof(struct nfsd4_conn
), GFP_KERNEL
);
785 svc_xprt_get(rqstp
->rq_xprt
);
786 conn
->cn_xprt
= rqstp
->rq_xprt
;
787 conn
->cn_flags
= flags
;
788 INIT_LIST_HEAD(&conn
->cn_xpt_user
.list
);
792 static void __nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
794 conn
->cn_session
= ses
;
795 list_add(&conn
->cn_persession
, &ses
->se_conns
);
798 static void nfsd4_hash_conn(struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
800 struct nfs4_client
*clp
= ses
->se_client
;
802 spin_lock(&clp
->cl_lock
);
803 __nfsd4_hash_conn(conn
, ses
);
804 spin_unlock(&clp
->cl_lock
);
807 static int nfsd4_register_conn(struct nfsd4_conn
*conn
)
809 conn
->cn_xpt_user
.callback
= nfsd4_conn_lost
;
810 return register_xpt_user(conn
->cn_xprt
, &conn
->cn_xpt_user
);
813 static void nfsd4_init_conn(struct svc_rqst
*rqstp
, struct nfsd4_conn
*conn
, struct nfsd4_session
*ses
)
817 nfsd4_hash_conn(conn
, ses
);
818 ret
= nfsd4_register_conn(conn
);
820 /* oops; xprt is already down: */
821 nfsd4_conn_lost(&conn
->cn_xpt_user
);
822 if (conn
->cn_flags
& NFS4_CDFC4_BACK
) {
823 /* callback channel may be back up */
824 nfsd4_probe_callback(ses
->se_client
);
828 static struct nfsd4_conn
*alloc_conn_from_crses(struct svc_rqst
*rqstp
, struct nfsd4_create_session
*cses
)
830 u32 dir
= NFS4_CDFC4_FORE
;
832 if (cses
->flags
& SESSION4_BACK_CHAN
)
833 dir
|= NFS4_CDFC4_BACK
;
834 return alloc_conn(rqstp
, dir
);
837 /* must be called under client_lock */
838 static void nfsd4_del_conns(struct nfsd4_session
*s
)
840 struct nfs4_client
*clp
= s
->se_client
;
841 struct nfsd4_conn
*c
;
843 spin_lock(&clp
->cl_lock
);
844 while (!list_empty(&s
->se_conns
)) {
845 c
= list_first_entry(&s
->se_conns
, struct nfsd4_conn
, cn_persession
);
846 list_del_init(&c
->cn_persession
);
847 spin_unlock(&clp
->cl_lock
);
849 unregister_xpt_user(c
->cn_xprt
, &c
->cn_xpt_user
);
852 spin_lock(&clp
->cl_lock
);
854 spin_unlock(&clp
->cl_lock
);
857 static void __free_session(struct nfsd4_session
*ses
)
859 nfsd4_put_drc_mem(slot_bytes(&ses
->se_fchannel
), ses
->se_fchannel
.maxreqs
);
860 free_session_slots(ses
);
864 static void free_session(struct kref
*kref
)
866 struct nfsd4_session
*ses
;
869 ses
= container_of(kref
, struct nfsd4_session
, se_ref
);
870 nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
872 lockdep_assert_held(&nn
->client_lock
);
873 nfsd4_del_conns(ses
);
877 void nfsd4_put_session(struct nfsd4_session
*ses
)
879 struct nfsd_net
*nn
= net_generic(ses
->se_client
->net
, nfsd_net_id
);
881 spin_lock(&nn
->client_lock
);
882 nfsd4_put_session_locked(ses
);
883 spin_unlock(&nn
->client_lock
);
886 static struct nfsd4_session
*alloc_session(struct nfsd4_channel_attrs
*fchan
)
888 struct nfsd4_session
*new;
889 int numslots
, slotsize
;
891 * Note decreasing slot size below client's request may
892 * make it difficult for client to function correctly, whereas
893 * decreasing the number of slots will (just?) affect
894 * performance. When short on memory we therefore prefer to
895 * decrease number of slots instead of their size.
897 slotsize
= nfsd4_sanitize_slot_size(fchan
->maxresp_cached
);
898 numslots
= nfsd4_get_drc_mem(slotsize
, fchan
->maxreqs
);
902 new = __alloc_session(slotsize
, numslots
);
904 nfsd4_put_drc_mem(slotsize
, fchan
->maxreqs
);
907 init_forechannel_attrs(&new->se_fchannel
, fchan
, numslots
, slotsize
);
911 static void init_session(struct svc_rqst
*rqstp
, struct nfsd4_session
*new, struct nfs4_client
*clp
, struct nfsd4_create_session
*cses
)
914 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
916 new->se_client
= clp
;
919 INIT_LIST_HEAD(&new->se_conns
);
921 new->se_cb_seq_nr
= 1;
922 new->se_flags
= cses
->flags
;
923 new->se_cb_prog
= cses
->callback_prog
;
924 new->se_cb_sec
= cses
->cb_sec
;
925 kref_init(&new->se_ref
);
926 idx
= hash_sessionid(&new->se_sessionid
);
927 spin_lock(&nn
->client_lock
);
928 list_add(&new->se_hash
, &nn
->sessionid_hashtbl
[idx
]);
929 spin_lock(&clp
->cl_lock
);
930 list_add(&new->se_perclnt
, &clp
->cl_sessions
);
931 spin_unlock(&clp
->cl_lock
);
932 spin_unlock(&nn
->client_lock
);
934 if (cses
->flags
& SESSION4_BACK_CHAN
) {
935 struct sockaddr
*sa
= svc_addr(rqstp
);
937 * This is a little silly; with sessions there's no real
938 * use for the callback address. Use the peer address
939 * as a reasonable default for now, but consider fixing
940 * the rpc client not to require an address in the
943 rpc_copy_addr((struct sockaddr
*)&clp
->cl_cb_conn
.cb_addr
, sa
);
944 clp
->cl_cb_conn
.cb_addrlen
= svc_addr_len(sa
);
948 /* caller must hold client_lock */
949 static struct nfsd4_session
*
950 find_in_sessionid_hashtbl(struct nfs4_sessionid
*sessionid
, struct net
*net
)
952 struct nfsd4_session
*elem
;
954 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
956 dump_sessionid(__func__
, sessionid
);
957 idx
= hash_sessionid(sessionid
);
958 /* Search in the appropriate list */
959 list_for_each_entry(elem
, &nn
->sessionid_hashtbl
[idx
], se_hash
) {
960 if (!memcmp(elem
->se_sessionid
.data
, sessionid
->data
,
961 NFS4_MAX_SESSIONID_LEN
)) {
966 dprintk("%s: session not found\n", __func__
);
970 /* caller must hold client_lock */
972 unhash_session(struct nfsd4_session
*ses
)
974 list_del(&ses
->se_hash
);
975 spin_lock(&ses
->se_client
->cl_lock
);
976 list_del(&ses
->se_perclnt
);
977 spin_unlock(&ses
->se_client
->cl_lock
);
980 /* must be called under the client_lock */
982 renew_client_locked(struct nfs4_client
*clp
)
984 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
986 if (is_client_expired(clp
)) {
988 printk("%s: client (clientid %08x/%08x) already expired\n",
990 clp
->cl_clientid
.cl_boot
,
991 clp
->cl_clientid
.cl_id
);
995 dprintk("renewing client (clientid %08x/%08x)\n",
996 clp
->cl_clientid
.cl_boot
,
997 clp
->cl_clientid
.cl_id
);
998 list_move_tail(&clp
->cl_lru
, &nn
->client_lru
);
999 clp
->cl_time
= get_seconds();
1003 renew_client(struct nfs4_client
*clp
)
1005 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1007 spin_lock(&nn
->client_lock
);
1008 renew_client_locked(clp
);
1009 spin_unlock(&nn
->client_lock
);
1012 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1014 STALE_CLIENTID(clientid_t
*clid
, struct nfsd_net
*nn
)
1016 if (clid
->cl_boot
== nn
->boot_time
)
1018 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1019 clid
->cl_boot
, clid
->cl_id
, nn
->boot_time
);
1024 * XXX Should we use a slab cache ?
1025 * This type of memory management is somewhat inefficient, but we use it
1026 * anyway since SETCLIENTID is not a common operation.
1028 static struct nfs4_client
*alloc_client(struct xdr_netobj name
)
1030 struct nfs4_client
*clp
;
1032 clp
= kzalloc(sizeof(struct nfs4_client
), GFP_KERNEL
);
1035 clp
->cl_name
.data
= kmemdup(name
.data
, name
.len
, GFP_KERNEL
);
1036 if (clp
->cl_name
.data
== NULL
) {
1040 clp
->cl_name
.len
= name
.len
;
1045 free_client(struct nfs4_client
*clp
)
1047 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1049 lockdep_assert_held(&nn
->client_lock
);
1050 while (!list_empty(&clp
->cl_sessions
)) {
1051 struct nfsd4_session
*ses
;
1052 ses
= list_entry(clp
->cl_sessions
.next
, struct nfsd4_session
,
1054 list_del(&ses
->se_perclnt
);
1055 nfsd4_put_session_locked(ses
);
1057 free_svc_cred(&clp
->cl_cred
);
1058 kfree(clp
->cl_name
.data
);
1063 release_session_client(struct nfsd4_session
*session
)
1065 struct nfs4_client
*clp
= session
->se_client
;
1066 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1068 if (!atomic_dec_and_lock(&clp
->cl_refcount
, &nn
->client_lock
))
1070 if (is_client_expired(clp
)) {
1072 session
->se_client
= NULL
;
1074 renew_client_locked(clp
);
1075 spin_unlock(&nn
->client_lock
);
1078 /* must be called under the client_lock */
1080 unhash_client_locked(struct nfs4_client
*clp
)
1082 struct nfsd4_session
*ses
;
1084 mark_client_expired(clp
);
1085 list_del(&clp
->cl_lru
);
1086 spin_lock(&clp
->cl_lock
);
1087 list_for_each_entry(ses
, &clp
->cl_sessions
, se_perclnt
)
1088 list_del_init(&ses
->se_hash
);
1089 spin_unlock(&clp
->cl_lock
);
1093 destroy_client(struct nfs4_client
*clp
)
1095 struct nfs4_openowner
*oo
;
1096 struct nfs4_delegation
*dp
;
1097 struct list_head reaplist
;
1098 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1100 INIT_LIST_HEAD(&reaplist
);
1101 spin_lock(&recall_lock
);
1102 while (!list_empty(&clp
->cl_delegations
)) {
1103 dp
= list_entry(clp
->cl_delegations
.next
, struct nfs4_delegation
, dl_perclnt
);
1104 list_del_init(&dp
->dl_perclnt
);
1105 list_move(&dp
->dl_recall_lru
, &reaplist
);
1107 spin_unlock(&recall_lock
);
1108 while (!list_empty(&reaplist
)) {
1109 dp
= list_entry(reaplist
.next
, struct nfs4_delegation
, dl_recall_lru
);
1110 unhash_delegation(dp
);
1112 while (!list_empty(&clp
->cl_openowners
)) {
1113 oo
= list_entry(clp
->cl_openowners
.next
, struct nfs4_openowner
, oo_perclient
);
1114 release_openowner(oo
);
1116 nfsd4_shutdown_callback(clp
);
1117 if (clp
->cl_cb_conn
.cb_xprt
)
1118 svc_xprt_put(clp
->cl_cb_conn
.cb_xprt
);
1119 list_del(&clp
->cl_idhash
);
1120 if (test_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
))
1121 rb_erase(&clp
->cl_namenode
, &nn
->conf_name_tree
);
1123 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1124 spin_lock(&nn
->client_lock
);
1125 unhash_client_locked(clp
);
1126 if (atomic_read(&clp
->cl_refcount
) == 0)
1128 spin_unlock(&nn
->client_lock
);
1131 static void expire_client(struct nfs4_client
*clp
)
1133 nfsd4_client_record_remove(clp
);
1134 destroy_client(clp
);
1137 static void copy_verf(struct nfs4_client
*target
, nfs4_verifier
*source
)
1139 memcpy(target
->cl_verifier
.data
, source
->data
,
1140 sizeof(target
->cl_verifier
.data
));
1143 static void copy_clid(struct nfs4_client
*target
, struct nfs4_client
*source
)
1145 target
->cl_clientid
.cl_boot
= source
->cl_clientid
.cl_boot
;
1146 target
->cl_clientid
.cl_id
= source
->cl_clientid
.cl_id
;
1149 static int copy_cred(struct svc_cred
*target
, struct svc_cred
*source
)
1151 if (source
->cr_principal
) {
1152 target
->cr_principal
=
1153 kstrdup(source
->cr_principal
, GFP_KERNEL
);
1154 if (target
->cr_principal
== NULL
)
1157 target
->cr_principal
= NULL
;
1158 target
->cr_flavor
= source
->cr_flavor
;
1159 target
->cr_uid
= source
->cr_uid
;
1160 target
->cr_gid
= source
->cr_gid
;
1161 target
->cr_group_info
= source
->cr_group_info
;
1162 get_group_info(target
->cr_group_info
);
1167 compare_blob(const struct xdr_netobj
*o1
, const struct xdr_netobj
*o2
)
1171 res
= o1
->len
- o2
->len
;
1174 return (long long)memcmp(o1
->data
, o2
->data
, o1
->len
);
1177 static int same_name(const char *n1
, const char *n2
)
1179 return 0 == memcmp(n1
, n2
, HEXDIR_LEN
);
1183 same_verf(nfs4_verifier
*v1
, nfs4_verifier
*v2
)
1185 return 0 == memcmp(v1
->data
, v2
->data
, sizeof(v1
->data
));
1189 same_clid(clientid_t
*cl1
, clientid_t
*cl2
)
1191 return (cl1
->cl_boot
== cl2
->cl_boot
) && (cl1
->cl_id
== cl2
->cl_id
);
1194 static bool groups_equal(struct group_info
*g1
, struct group_info
*g2
)
1198 if (g1
->ngroups
!= g2
->ngroups
)
1200 for (i
=0; i
<g1
->ngroups
; i
++)
1201 if (GROUP_AT(g1
, i
) != GROUP_AT(g2
, i
))
1207 * RFC 3530 language requires clid_inuse be returned when the
1208 * "principal" associated with a requests differs from that previously
1209 * used. We use uid, gid's, and gss principal string as our best
1210 * approximation. We also don't want to allow non-gss use of a client
1211 * established using gss: in theory cr_principal should catch that
1212 * change, but in practice cr_principal can be null even in the gss case
1213 * since gssd doesn't always pass down a principal string.
1215 static bool is_gss_cred(struct svc_cred
*cr
)
1217 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1218 return (cr
->cr_flavor
> RPC_AUTH_MAXFLAVOR
);
1223 same_creds(struct svc_cred
*cr1
, struct svc_cred
*cr2
)
1225 if ((is_gss_cred(cr1
) != is_gss_cred(cr2
))
1226 || (cr1
->cr_uid
!= cr2
->cr_uid
)
1227 || (cr1
->cr_gid
!= cr2
->cr_gid
)
1228 || !groups_equal(cr1
->cr_group_info
, cr2
->cr_group_info
))
1230 if (cr1
->cr_principal
== cr2
->cr_principal
)
1232 if (!cr1
->cr_principal
|| !cr2
->cr_principal
)
1234 return 0 == strcmp(cr1
->cr_principal
, cr2
->cr_principal
);
1237 static void gen_clid(struct nfs4_client
*clp
, struct nfsd_net
*nn
)
1239 static u32 current_clientid
= 1;
1241 clp
->cl_clientid
.cl_boot
= nn
->boot_time
;
1242 clp
->cl_clientid
.cl_id
= current_clientid
++;
1245 static void gen_confirm(struct nfs4_client
*clp
)
1250 verf
[0] = (__be32
)get_seconds();
1251 verf
[1] = (__be32
)i
++;
1252 memcpy(clp
->cl_confirm
.data
, verf
, sizeof(clp
->cl_confirm
.data
));
1255 static struct nfs4_stid
*find_stateid(struct nfs4_client
*cl
, stateid_t
*t
)
1257 return idr_find(&cl
->cl_stateids
, t
->si_opaque
.so_id
);
1260 static struct nfs4_stid
*find_stateid_by_type(struct nfs4_client
*cl
, stateid_t
*t
, char typemask
)
1262 struct nfs4_stid
*s
;
1264 s
= find_stateid(cl
, t
);
1267 if (typemask
& s
->sc_type
)
1272 static struct nfs4_client
*create_client(struct xdr_netobj name
,
1273 struct svc_rqst
*rqstp
, nfs4_verifier
*verf
)
1275 struct nfs4_client
*clp
;
1276 struct sockaddr
*sa
= svc_addr(rqstp
);
1278 struct net
*net
= SVC_NET(rqstp
);
1279 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1281 clp
= alloc_client(name
);
1285 INIT_LIST_HEAD(&clp
->cl_sessions
);
1286 ret
= copy_cred(&clp
->cl_cred
, &rqstp
->rq_cred
);
1288 spin_lock(&nn
->client_lock
);
1290 spin_unlock(&nn
->client_lock
);
1293 idr_init(&clp
->cl_stateids
);
1294 atomic_set(&clp
->cl_refcount
, 0);
1295 clp
->cl_cb_state
= NFSD4_CB_UNKNOWN
;
1296 INIT_LIST_HEAD(&clp
->cl_idhash
);
1297 INIT_LIST_HEAD(&clp
->cl_openowners
);
1298 INIT_LIST_HEAD(&clp
->cl_delegations
);
1299 INIT_LIST_HEAD(&clp
->cl_lru
);
1300 INIT_LIST_HEAD(&clp
->cl_callbacks
);
1301 spin_lock_init(&clp
->cl_lock
);
1302 nfsd4_init_callback(&clp
->cl_cb_null
);
1303 clp
->cl_time
= get_seconds();
1304 clear_bit(0, &clp
->cl_cb_slot_busy
);
1305 rpc_init_wait_queue(&clp
->cl_cb_waitq
, "Backchannel slot table");
1306 copy_verf(clp
, verf
);
1307 rpc_copy_addr((struct sockaddr
*) &clp
->cl_addr
, sa
);
1309 clp
->cl_cb_session
= NULL
;
1315 add_clp_to_name_tree(struct nfs4_client
*new_clp
, struct rb_root
*root
)
1317 struct rb_node
**new = &(root
->rb_node
), *parent
= NULL
;
1318 struct nfs4_client
*clp
;
1321 clp
= rb_entry(*new, struct nfs4_client
, cl_namenode
);
1324 if (compare_blob(&clp
->cl_name
, &new_clp
->cl_name
) > 0)
1325 new = &((*new)->rb_left
);
1327 new = &((*new)->rb_right
);
1330 rb_link_node(&new_clp
->cl_namenode
, parent
, new);
1331 rb_insert_color(&new_clp
->cl_namenode
, root
);
1334 static struct nfs4_client
*
1335 find_clp_in_name_tree(struct xdr_netobj
*name
, struct rb_root
*root
)
1338 struct rb_node
*node
= root
->rb_node
;
1339 struct nfs4_client
*clp
;
1342 clp
= rb_entry(node
, struct nfs4_client
, cl_namenode
);
1343 cmp
= compare_blob(&clp
->cl_name
, name
);
1345 node
= node
->rb_left
;
1347 node
= node
->rb_right
;
1355 add_to_unconfirmed(struct nfs4_client
*clp
)
1357 unsigned int idhashval
;
1358 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1360 clear_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1361 add_clp_to_name_tree(clp
, &nn
->unconf_name_tree
);
1362 idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1363 list_add(&clp
->cl_idhash
, &nn
->unconf_id_hashtbl
[idhashval
]);
1368 move_to_confirmed(struct nfs4_client
*clp
)
1370 unsigned int idhashval
= clientid_hashval(clp
->cl_clientid
.cl_id
);
1371 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
1373 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp
);
1374 list_move(&clp
->cl_idhash
, &nn
->conf_id_hashtbl
[idhashval
]);
1375 rb_erase(&clp
->cl_namenode
, &nn
->unconf_name_tree
);
1376 add_clp_to_name_tree(clp
, &nn
->conf_name_tree
);
1377 set_bit(NFSD4_CLIENT_CONFIRMED
, &clp
->cl_flags
);
1381 static struct nfs4_client
*
1382 find_confirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1384 struct nfs4_client
*clp
;
1385 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1387 list_for_each_entry(clp
, &nn
->conf_id_hashtbl
[idhashval
], cl_idhash
) {
1388 if (same_clid(&clp
->cl_clientid
, clid
)) {
1389 if ((bool)clp
->cl_minorversion
!= sessions
)
1398 static struct nfs4_client
*
1399 find_unconfirmed_client(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
1401 struct nfs4_client
*clp
;
1402 unsigned int idhashval
= clientid_hashval(clid
->cl_id
);
1404 list_for_each_entry(clp
, &nn
->unconf_id_hashtbl
[idhashval
], cl_idhash
) {
1405 if (same_clid(&clp
->cl_clientid
, clid
)) {
1406 if ((bool)clp
->cl_minorversion
!= sessions
)
1414 static bool clp_used_exchangeid(struct nfs4_client
*clp
)
1416 return clp
->cl_exchange_flags
!= 0;
1419 static struct nfs4_client
*
1420 find_confirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1422 return find_clp_in_name_tree(name
, &nn
->conf_name_tree
);
1425 static struct nfs4_client
*
1426 find_unconfirmed_client_by_name(struct xdr_netobj
*name
, struct nfsd_net
*nn
)
1428 return find_clp_in_name_tree(name
, &nn
->unconf_name_tree
);
1432 gen_callback(struct nfs4_client
*clp
, struct nfsd4_setclientid
*se
, struct svc_rqst
*rqstp
)
1434 struct nfs4_cb_conn
*conn
= &clp
->cl_cb_conn
;
1435 struct sockaddr
*sa
= svc_addr(rqstp
);
1436 u32 scopeid
= rpc_get_scope_id(sa
);
1437 unsigned short expected_family
;
1439 /* Currently, we only support tcp and tcp6 for the callback channel */
1440 if (se
->se_callback_netid_len
== 3 &&
1441 !memcmp(se
->se_callback_netid_val
, "tcp", 3))
1442 expected_family
= AF_INET
;
1443 else if (se
->se_callback_netid_len
== 4 &&
1444 !memcmp(se
->se_callback_netid_val
, "tcp6", 4))
1445 expected_family
= AF_INET6
;
1449 conn
->cb_addrlen
= rpc_uaddr2sockaddr(clp
->net
, se
->se_callback_addr_val
,
1450 se
->se_callback_addr_len
,
1451 (struct sockaddr
*)&conn
->cb_addr
,
1452 sizeof(conn
->cb_addr
));
1454 if (!conn
->cb_addrlen
|| conn
->cb_addr
.ss_family
!= expected_family
)
1457 if (conn
->cb_addr
.ss_family
== AF_INET6
)
1458 ((struct sockaddr_in6
*)&conn
->cb_addr
)->sin6_scope_id
= scopeid
;
1460 conn
->cb_prog
= se
->se_callback_prog
;
1461 conn
->cb_ident
= se
->se_callback_ident
;
1462 memcpy(&conn
->cb_saddr
, &rqstp
->rq_daddr
, rqstp
->rq_daddrlen
);
1465 conn
->cb_addr
.ss_family
= AF_UNSPEC
;
1466 conn
->cb_addrlen
= 0;
1467 dprintk(KERN_INFO
"NFSD: this client (clientid %08x/%08x) "
1468 "will not receive delegations\n",
1469 clp
->cl_clientid
.cl_boot
, clp
->cl_clientid
.cl_id
);
1475 * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size.
1478 nfsd4_store_cache_entry(struct nfsd4_compoundres
*resp
)
1480 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1483 dprintk("--> %s slot %p\n", __func__
, slot
);
1485 slot
->sl_opcnt
= resp
->opcnt
;
1486 slot
->sl_status
= resp
->cstate
.status
;
1488 slot
->sl_flags
|= NFSD4_SLOT_INITIALIZED
;
1489 if (nfsd4_not_cached(resp
)) {
1490 slot
->sl_datalen
= 0;
1493 slot
->sl_datalen
= (char *)resp
->p
- (char *)resp
->cstate
.datap
;
1494 base
= (char *)resp
->cstate
.datap
-
1495 (char *)resp
->xbuf
->head
[0].iov_base
;
1496 if (read_bytes_from_xdr_buf(resp
->xbuf
, base
, slot
->sl_data
,
1498 WARN("%s: sessions DRC could not cache compound\n", __func__
);
1503 * Encode the replay sequence operation from the slot values.
1504 * If cachethis is FALSE encode the uncached rep error on the next
1505 * operation which sets resp->p and increments resp->opcnt for
1506 * nfs4svc_encode_compoundres.
1510 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs
*args
,
1511 struct nfsd4_compoundres
*resp
)
1513 struct nfsd4_op
*op
;
1514 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1516 /* Encode the replayed sequence operation */
1517 op
= &args
->ops
[resp
->opcnt
- 1];
1518 nfsd4_encode_operation(resp
, op
);
1520 /* Return nfserr_retry_uncached_rep in next operation. */
1521 if (args
->opcnt
> 1 && !(slot
->sl_flags
& NFSD4_SLOT_CACHETHIS
)) {
1522 op
= &args
->ops
[resp
->opcnt
++];
1523 op
->status
= nfserr_retry_uncached_rep
;
1524 nfsd4_encode_operation(resp
, op
);
1530 * The sequence operation is not cached because we can use the slot and
1534 nfsd4_replay_cache_entry(struct nfsd4_compoundres
*resp
,
1535 struct nfsd4_sequence
*seq
)
1537 struct nfsd4_slot
*slot
= resp
->cstate
.slot
;
1540 dprintk("--> %s slot %p\n", __func__
, slot
);
1542 /* Either returns 0 or nfserr_retry_uncached */
1543 status
= nfsd4_enc_sequence_replay(resp
->rqstp
->rq_argp
, resp
);
1544 if (status
== nfserr_retry_uncached_rep
)
1547 /* The sequence operation has been encoded, cstate->datap set. */
1548 memcpy(resp
->cstate
.datap
, slot
->sl_data
, slot
->sl_datalen
);
1550 resp
->opcnt
= slot
->sl_opcnt
;
1551 resp
->p
= resp
->cstate
.datap
+ XDR_QUADLEN(slot
->sl_datalen
);
1552 status
= slot
->sl_status
;
1558 * Set the exchange_id flags returned by the server.
1561 nfsd4_set_ex_flags(struct nfs4_client
*new, struct nfsd4_exchange_id
*clid
)
1563 /* pNFS is not supported */
1564 new->cl_exchange_flags
|= EXCHGID4_FLAG_USE_NON_PNFS
;
1566 /* Referrals are supported, Migration is not. */
1567 new->cl_exchange_flags
|= EXCHGID4_FLAG_SUPP_MOVED_REFER
;
1569 /* set the wire flags to return to client. */
1570 clid
->flags
= new->cl_exchange_flags
;
1573 static bool client_has_state(struct nfs4_client
*clp
)
1576 * Note clp->cl_openowners check isn't quite right: there's no
1577 * need to count owners without stateid's.
1579 * Also note we should probably be using this in 4.0 case too.
1581 return !list_empty(&clp
->cl_openowners
)
1582 || !list_empty(&clp
->cl_delegations
)
1583 || !list_empty(&clp
->cl_sessions
);
1587 nfsd4_exchange_id(struct svc_rqst
*rqstp
,
1588 struct nfsd4_compound_state
*cstate
,
1589 struct nfsd4_exchange_id
*exid
)
1591 struct nfs4_client
*unconf
, *conf
, *new;
1593 char addr_str
[INET6_ADDRSTRLEN
];
1594 nfs4_verifier verf
= exid
->verifier
;
1595 struct sockaddr
*sa
= svc_addr(rqstp
);
1596 bool update
= exid
->flags
& EXCHGID4_FLAG_UPD_CONFIRMED_REC_A
;
1597 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1599 rpc_ntop(sa
, addr_str
, sizeof(addr_str
));
1600 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1601 "ip_addr=%s flags %x, spa_how %d\n",
1602 __func__
, rqstp
, exid
, exid
->clname
.len
, exid
->clname
.data
,
1603 addr_str
, exid
->flags
, exid
->spa_how
);
1605 if (exid
->flags
& ~EXCHGID4_FLAG_MASK_A
)
1606 return nfserr_inval
;
1608 /* Currently only support SP4_NONE */
1609 switch (exid
->spa_how
) {
1612 default: /* checked by xdr code */
1616 return nfserr_serverfault
; /* no excuse :-/ */
1619 /* Cases below refer to rfc 5661 section 18.35.4: */
1621 conf
= find_confirmed_client_by_name(&exid
->clname
, nn
);
1623 bool creds_match
= same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
);
1624 bool verfs_match
= same_verf(&verf
, &conf
->cl_verifier
);
1627 if (!clp_used_exchangeid(conf
)) { /* buggy client */
1628 status
= nfserr_inval
;
1631 if (!creds_match
) { /* case 9 */
1632 status
= nfserr_perm
;
1635 if (!verfs_match
) { /* case 8 */
1636 status
= nfserr_not_same
;
1640 exid
->flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1644 if (!creds_match
) { /* case 3 */
1645 if (client_has_state(conf
)) {
1646 status
= nfserr_clid_inuse
;
1649 expire_client(conf
);
1652 if (verfs_match
) { /* case 2 */
1653 conf
->cl_exchange_flags
|= EXCHGID4_FLAG_CONFIRMED_R
;
1657 /* case 5, client reboot */
1661 if (update
) { /* case 7 */
1662 status
= nfserr_noent
;
1666 unconf
= find_unconfirmed_client_by_name(&exid
->clname
, nn
);
1667 if (unconf
) /* case 4, possible retry or client restart */
1668 expire_client(unconf
);
1670 /* case 1 (normal case) */
1672 new = create_client(exid
->clname
, rqstp
, &verf
);
1674 status
= nfserr_jukebox
;
1677 new->cl_minorversion
= 1;
1680 add_to_unconfirmed(new);
1682 exid
->clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
1683 exid
->clientid
.cl_id
= new->cl_clientid
.cl_id
;
1685 exid
->seqid
= new->cl_cs_slot
.sl_seqid
+ 1;
1686 nfsd4_set_ex_flags(new, exid
);
1688 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1689 new->cl_cs_slot
.sl_seqid
, new->cl_exchange_flags
);
1693 nfs4_unlock_state();
1698 check_slot_seqid(u32 seqid
, u32 slot_seqid
, int slot_inuse
)
1700 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__
, seqid
,
1703 /* The slot is in use, and no response has been sent. */
1705 if (seqid
== slot_seqid
)
1706 return nfserr_jukebox
;
1708 return nfserr_seq_misordered
;
1710 /* Note unsigned 32-bit arithmetic handles wraparound: */
1711 if (likely(seqid
== slot_seqid
+ 1))
1713 if (seqid
== slot_seqid
)
1714 return nfserr_replay_cache
;
1715 return nfserr_seq_misordered
;
1719 * Cache the create session result into the create session single DRC
1720 * slot cache by saving the xdr structure. sl_seqid has been set.
1721 * Do this for solo or embedded create session operations.
1724 nfsd4_cache_create_session(struct nfsd4_create_session
*cr_ses
,
1725 struct nfsd4_clid_slot
*slot
, __be32 nfserr
)
1727 slot
->sl_status
= nfserr
;
1728 memcpy(&slot
->sl_cr_ses
, cr_ses
, sizeof(*cr_ses
));
1732 nfsd4_replay_create_session(struct nfsd4_create_session
*cr_ses
,
1733 struct nfsd4_clid_slot
*slot
)
1735 memcpy(cr_ses
, &slot
->sl_cr_ses
, sizeof(*cr_ses
));
1736 return slot
->sl_status
;
1739 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1740 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1741 1 + /* MIN tag is length with zero, only length */ \
1742 3 + /* version, opcount, opcode */ \
1743 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1744 /* seqid, slotID, slotID, cache */ \
1745 4 ) * sizeof(__be32))
1747 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1748 2 + /* verifier: AUTH_NULL, length 0 */\
1750 1 + /* MIN tag is length with zero, only length */ \
1751 3 + /* opcount, opcode, opstatus*/ \
1752 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1753 /* seqid, slotID, slotID, slotID, status */ \
1754 5 ) * sizeof(__be32))
1756 static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel
)
1758 return fchannel
.maxreq_sz
< NFSD_MIN_REQ_HDR_SEQ_SZ
1759 || fchannel
.maxresp_sz
< NFSD_MIN_RESP_HDR_SEQ_SZ
;
1763 nfsd4_create_session(struct svc_rqst
*rqstp
,
1764 struct nfsd4_compound_state
*cstate
,
1765 struct nfsd4_create_session
*cr_ses
)
1767 struct sockaddr
*sa
= svc_addr(rqstp
);
1768 struct nfs4_client
*conf
, *unconf
;
1769 struct nfsd4_session
*new;
1770 struct nfsd4_conn
*conn
;
1771 struct nfsd4_clid_slot
*cs_slot
= NULL
;
1773 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1775 if (cr_ses
->flags
& ~SESSION4_FLAG_MASK_A
)
1776 return nfserr_inval
;
1777 if (check_forechannel_attrs(cr_ses
->fore_channel
))
1778 return nfserr_toosmall
;
1779 new = alloc_session(&cr_ses
->fore_channel
);
1781 return nfserr_jukebox
;
1782 status
= nfserr_jukebox
;
1783 conn
= alloc_conn_from_crses(rqstp
, cr_ses
);
1785 goto out_free_session
;
1788 unconf
= find_unconfirmed_client(&cr_ses
->clientid
, true, nn
);
1789 conf
= find_confirmed_client(&cr_ses
->clientid
, true, nn
);
1792 cs_slot
= &conf
->cl_cs_slot
;
1793 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1794 if (status
== nfserr_replay_cache
) {
1795 status
= nfsd4_replay_create_session(cr_ses
, cs_slot
);
1797 } else if (cr_ses
->seqid
!= cs_slot
->sl_seqid
+ 1) {
1798 status
= nfserr_seq_misordered
;
1801 } else if (unconf
) {
1802 struct nfs4_client
*old
;
1803 if (!same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
) ||
1804 !rpc_cmp_addr(sa
, (struct sockaddr
*) &unconf
->cl_addr
)) {
1805 status
= nfserr_clid_inuse
;
1808 cs_slot
= &unconf
->cl_cs_slot
;
1809 status
= check_slot_seqid(cr_ses
->seqid
, cs_slot
->sl_seqid
, 0);
1811 /* an unconfirmed replay returns misordered */
1812 status
= nfserr_seq_misordered
;
1815 old
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
1818 move_to_confirmed(unconf
);
1821 status
= nfserr_stale_clientid
;
1826 * We do not support RDMA or persistent sessions
1828 cr_ses
->flags
&= ~SESSION4_PERSIST
;
1829 cr_ses
->flags
&= ~SESSION4_RDMA
;
1831 init_session(rqstp
, new, conf
, cr_ses
);
1832 nfsd4_init_conn(rqstp
, conn
, new);
1834 memcpy(cr_ses
->sessionid
.data
, new->se_sessionid
.data
,
1835 NFS4_MAX_SESSIONID_LEN
);
1836 memcpy(&cr_ses
->fore_channel
, &new->se_fchannel
,
1837 sizeof(struct nfsd4_channel_attrs
));
1838 cs_slot
->sl_seqid
++;
1839 cr_ses
->seqid
= cs_slot
->sl_seqid
;
1841 /* cache solo and embedded create sessions under the state lock */
1842 nfsd4_cache_create_session(cr_ses
, cs_slot
, status
);
1844 nfs4_unlock_state();
1845 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1850 __free_session(new);
1854 static bool nfsd4_last_compound_op(struct svc_rqst
*rqstp
)
1856 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
1857 struct nfsd4_compoundargs
*argp
= rqstp
->rq_argp
;
1859 return argp
->opcnt
== resp
->opcnt
;
1862 static __be32
nfsd4_map_bcts_dir(u32
*dir
)
1865 case NFS4_CDFC4_FORE
:
1866 case NFS4_CDFC4_BACK
:
1868 case NFS4_CDFC4_FORE_OR_BOTH
:
1869 case NFS4_CDFC4_BACK_OR_BOTH
:
1870 *dir
= NFS4_CDFC4_BOTH
;
1873 return nfserr_inval
;
1876 __be32
nfsd4_backchannel_ctl(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_backchannel_ctl
*bc
)
1878 struct nfsd4_session
*session
= cstate
->session
;
1879 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1881 spin_lock(&nn
->client_lock
);
1882 session
->se_cb_prog
= bc
->bc_cb_program
;
1883 session
->se_cb_sec
= bc
->bc_cb_sec
;
1884 spin_unlock(&nn
->client_lock
);
1886 nfsd4_probe_callback(session
->se_client
);
1891 __be32
nfsd4_bind_conn_to_session(struct svc_rqst
*rqstp
,
1892 struct nfsd4_compound_state
*cstate
,
1893 struct nfsd4_bind_conn_to_session
*bcts
)
1896 struct nfsd4_conn
*conn
;
1897 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
1899 if (!nfsd4_last_compound_op(rqstp
))
1900 return nfserr_not_only_op
;
1901 spin_lock(&nn
->client_lock
);
1902 cstate
->session
= find_in_sessionid_hashtbl(&bcts
->sessionid
, SVC_NET(rqstp
));
1903 /* Sorta weird: we only need the refcnt'ing because new_conn acquires
1904 * client_lock iself: */
1905 if (cstate
->session
) {
1906 nfsd4_get_session(cstate
->session
);
1907 atomic_inc(&cstate
->session
->se_client
->cl_refcount
);
1909 spin_unlock(&nn
->client_lock
);
1910 if (!cstate
->session
)
1911 return nfserr_badsession
;
1913 status
= nfsd4_map_bcts_dir(&bcts
->dir
);
1916 conn
= alloc_conn(rqstp
, bcts
->dir
);
1918 return nfserr_jukebox
;
1919 nfsd4_init_conn(rqstp
, conn
, cstate
->session
);
1923 static bool nfsd4_compound_in_session(struct nfsd4_session
*session
, struct nfs4_sessionid
*sid
)
1927 return !memcmp(sid
, &session
->se_sessionid
, sizeof(*sid
));
1931 nfsd4_destroy_session(struct svc_rqst
*r
,
1932 struct nfsd4_compound_state
*cstate
,
1933 struct nfsd4_destroy_session
*sessionid
)
1935 struct nfsd4_session
*ses
;
1936 __be32 status
= nfserr_badsession
;
1937 struct nfsd_net
*nn
= net_generic(SVC_NET(r
), nfsd_net_id
);
1940 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
1941 * - Should we return nfserr_back_chan_busy if waiting for
1942 * callbacks on to-be-destroyed session?
1943 * - Do we need to clear any callback info from previous session?
1946 if (nfsd4_compound_in_session(cstate
->session
, &sessionid
->sessionid
)) {
1947 if (!nfsd4_last_compound_op(r
))
1948 return nfserr_not_only_op
;
1950 dump_sessionid(__func__
, &sessionid
->sessionid
);
1951 spin_lock(&nn
->client_lock
);
1952 ses
= find_in_sessionid_hashtbl(&sessionid
->sessionid
, SVC_NET(r
));
1954 spin_unlock(&nn
->client_lock
);
1958 unhash_session(ses
);
1959 spin_unlock(&nn
->client_lock
);
1962 nfsd4_probe_callback_sync(ses
->se_client
);
1963 nfs4_unlock_state();
1965 spin_lock(&nn
->client_lock
);
1966 nfsd4_del_conns(ses
);
1967 nfsd4_put_session_locked(ses
);
1968 spin_unlock(&nn
->client_lock
);
1971 dprintk("%s returns %d\n", __func__
, ntohl(status
));
1975 static struct nfsd4_conn
*__nfsd4_find_conn(struct svc_xprt
*xpt
, struct nfsd4_session
*s
)
1977 struct nfsd4_conn
*c
;
1979 list_for_each_entry(c
, &s
->se_conns
, cn_persession
) {
1980 if (c
->cn_xprt
== xpt
) {
1987 static void nfsd4_sequence_check_conn(struct nfsd4_conn
*new, struct nfsd4_session
*ses
)
1989 struct nfs4_client
*clp
= ses
->se_client
;
1990 struct nfsd4_conn
*c
;
1993 spin_lock(&clp
->cl_lock
);
1994 c
= __nfsd4_find_conn(new->cn_xprt
, ses
);
1996 spin_unlock(&clp
->cl_lock
);
2000 __nfsd4_hash_conn(new, ses
);
2001 spin_unlock(&clp
->cl_lock
);
2002 ret
= nfsd4_register_conn(new);
2004 /* oops; xprt is already down: */
2005 nfsd4_conn_lost(&new->cn_xpt_user
);
2009 static bool nfsd4_session_too_many_ops(struct svc_rqst
*rqstp
, struct nfsd4_session
*session
)
2011 struct nfsd4_compoundargs
*args
= rqstp
->rq_argp
;
2013 return args
->opcnt
> session
->se_fchannel
.maxops
;
2016 static bool nfsd4_request_too_big(struct svc_rqst
*rqstp
,
2017 struct nfsd4_session
*session
)
2019 struct xdr_buf
*xb
= &rqstp
->rq_arg
;
2021 return xb
->len
> session
->se_fchannel
.maxreq_sz
;
2025 nfsd4_sequence(struct svc_rqst
*rqstp
,
2026 struct nfsd4_compound_state
*cstate
,
2027 struct nfsd4_sequence
*seq
)
2029 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
2030 struct nfsd4_session
*session
;
2031 struct nfsd4_slot
*slot
;
2032 struct nfsd4_conn
*conn
;
2034 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2036 if (resp
->opcnt
!= 1)
2037 return nfserr_sequence_pos
;
2040 * Will be either used or freed by nfsd4_sequence_check_conn
2043 conn
= alloc_conn(rqstp
, NFS4_CDFC4_FORE
);
2045 return nfserr_jukebox
;
2047 spin_lock(&nn
->client_lock
);
2048 status
= nfserr_badsession
;
2049 session
= find_in_sessionid_hashtbl(&seq
->sessionid
, SVC_NET(rqstp
));
2053 status
= nfserr_too_many_ops
;
2054 if (nfsd4_session_too_many_ops(rqstp
, session
))
2057 status
= nfserr_req_too_big
;
2058 if (nfsd4_request_too_big(rqstp
, session
))
2061 status
= nfserr_badslot
;
2062 if (seq
->slotid
>= session
->se_fchannel
.maxreqs
)
2065 slot
= session
->se_slots
[seq
->slotid
];
2066 dprintk("%s: slotid %d\n", __func__
, seq
->slotid
);
2068 /* We do not negotiate the number of slots yet, so set the
2069 * maxslots to the session maxreqs which is used to encode
2070 * sr_highest_slotid and the sr_target_slot id to maxslots */
2071 seq
->maxslots
= session
->se_fchannel
.maxreqs
;
2073 status
= check_slot_seqid(seq
->seqid
, slot
->sl_seqid
,
2074 slot
->sl_flags
& NFSD4_SLOT_INUSE
);
2075 if (status
== nfserr_replay_cache
) {
2076 status
= nfserr_seq_misordered
;
2077 if (!(slot
->sl_flags
& NFSD4_SLOT_INITIALIZED
))
2079 cstate
->slot
= slot
;
2080 cstate
->session
= session
;
2081 /* Return the cached reply status and set cstate->status
2082 * for nfsd4_proc_compound processing */
2083 status
= nfsd4_replay_cache_entry(resp
, seq
);
2084 cstate
->status
= nfserr_replay_cache
;
2090 nfsd4_sequence_check_conn(conn
, session
);
2093 /* Success! bump slot seqid */
2094 slot
->sl_seqid
= seq
->seqid
;
2095 slot
->sl_flags
|= NFSD4_SLOT_INUSE
;
2097 slot
->sl_flags
|= NFSD4_SLOT_CACHETHIS
;
2099 slot
->sl_flags
&= ~NFSD4_SLOT_CACHETHIS
;
2101 cstate
->slot
= slot
;
2102 cstate
->session
= session
;
2105 /* Hold a session reference until done processing the compound. */
2106 if (cstate
->session
) {
2107 struct nfs4_client
*clp
= session
->se_client
;
2109 nfsd4_get_session(cstate
->session
);
2110 atomic_inc(&clp
->cl_refcount
);
2111 switch (clp
->cl_cb_state
) {
2113 seq
->status_flags
= SEQ4_STATUS_CB_PATH_DOWN
;
2115 case NFSD4_CB_FAULT
:
2116 seq
->status_flags
= SEQ4_STATUS_BACKCHANNEL_FAULT
;
2119 seq
->status_flags
= 0;
2123 spin_unlock(&nn
->client_lock
);
2124 dprintk("%s: return %d\n", __func__
, ntohl(status
));
2129 nfsd4_destroy_clientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_destroy_clientid
*dc
)
2131 struct nfs4_client
*conf
, *unconf
, *clp
;
2133 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2136 unconf
= find_unconfirmed_client(&dc
->clientid
, true, nn
);
2137 conf
= find_confirmed_client(&dc
->clientid
, true, nn
);
2142 if (!is_client_expired(conf
) && client_has_state(conf
)) {
2143 status
= nfserr_clientid_busy
;
2147 /* rfc5661 18.50.3 */
2148 if (cstate
->session
&& conf
== cstate
->session
->se_client
) {
2149 status
= nfserr_clientid_busy
;
2155 status
= nfserr_stale_clientid
;
2161 nfs4_unlock_state();
2162 dprintk("%s return %d\n", __func__
, ntohl(status
));
2167 nfsd4_reclaim_complete(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
, struct nfsd4_reclaim_complete
*rc
)
2171 if (rc
->rca_one_fs
) {
2172 if (!cstate
->current_fh
.fh_dentry
)
2173 return nfserr_nofilehandle
;
2175 * We don't take advantage of the rca_one_fs case.
2176 * That's OK, it's optional, we can safely ignore it.
2182 status
= nfserr_complete_already
;
2183 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE
,
2184 &cstate
->session
->se_client
->cl_flags
))
2187 status
= nfserr_stale_clientid
;
2188 if (is_client_expired(cstate
->session
->se_client
))
2190 * The following error isn't really legal.
2191 * But we only get here if the client just explicitly
2192 * destroyed the client. Surely it no longer cares what
2193 * error it gets back on an operation for the dead
2199 nfsd4_client_record_create(cstate
->session
->se_client
);
2201 nfs4_unlock_state();
2206 nfsd4_setclientid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
2207 struct nfsd4_setclientid
*setclid
)
2209 struct xdr_netobj clname
= setclid
->se_name
;
2210 nfs4_verifier clverifier
= setclid
->se_verf
;
2211 struct nfs4_client
*conf
, *unconf
, *new;
2213 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2215 /* Cases below refer to rfc 3530 section 14.2.33: */
2217 conf
= find_confirmed_client_by_name(&clname
, nn
);
2220 status
= nfserr_clid_inuse
;
2221 if (clp_used_exchangeid(conf
))
2223 if (!same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
)) {
2224 char addr_str
[INET6_ADDRSTRLEN
];
2225 rpc_ntop((struct sockaddr
*) &conf
->cl_addr
, addr_str
,
2227 dprintk("NFSD: setclientid: string in use by client "
2228 "at %s\n", addr_str
);
2232 unconf
= find_unconfirmed_client_by_name(&clname
, nn
);
2234 expire_client(unconf
);
2235 status
= nfserr_jukebox
;
2236 new = create_client(clname
, rqstp
, &clverifier
);
2239 if (conf
&& same_verf(&conf
->cl_verifier
, &clverifier
))
2240 /* case 1: probable callback update */
2241 copy_clid(new, conf
);
2242 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2244 new->cl_minorversion
= 0;
2245 gen_callback(new, setclid
, rqstp
);
2246 add_to_unconfirmed(new);
2247 setclid
->se_clientid
.cl_boot
= new->cl_clientid
.cl_boot
;
2248 setclid
->se_clientid
.cl_id
= new->cl_clientid
.cl_id
;
2249 memcpy(setclid
->se_confirm
.data
, new->cl_confirm
.data
, sizeof(setclid
->se_confirm
.data
));
2252 nfs4_unlock_state();
2258 nfsd4_setclientid_confirm(struct svc_rqst
*rqstp
,
2259 struct nfsd4_compound_state
*cstate
,
2260 struct nfsd4_setclientid_confirm
*setclientid_confirm
)
2262 struct nfs4_client
*conf
, *unconf
;
2263 nfs4_verifier confirm
= setclientid_confirm
->sc_confirm
;
2264 clientid_t
* clid
= &setclientid_confirm
->sc_clientid
;
2266 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
2268 if (STALE_CLIENTID(clid
, nn
))
2269 return nfserr_stale_clientid
;
2272 conf
= find_confirmed_client(clid
, false, nn
);
2273 unconf
= find_unconfirmed_client(clid
, false, nn
);
2275 * We try hard to give out unique clientid's, so if we get an
2276 * attempt to confirm the same clientid with a different cred,
2277 * there's a bug somewhere. Let's charitably assume it's our
2280 status
= nfserr_serverfault
;
2281 if (unconf
&& !same_creds(&unconf
->cl_cred
, &rqstp
->rq_cred
))
2283 if (conf
&& !same_creds(&conf
->cl_cred
, &rqstp
->rq_cred
))
2285 /* cases below refer to rfc 3530 section 14.2.34: */
2286 if (!unconf
|| !same_verf(&confirm
, &unconf
->cl_confirm
)) {
2287 if (conf
&& !unconf
) /* case 2: probable retransmit */
2289 else /* case 4: client hasn't noticed we rebooted yet? */
2290 status
= nfserr_stale_clientid
;
2294 if (conf
) { /* case 1: callback update */
2295 nfsd4_change_callback(conf
, &unconf
->cl_cb_conn
);
2296 nfsd4_probe_callback(conf
);
2297 expire_client(unconf
);
2298 } else { /* case 3: normal case; new or rebooted client */
2299 conf
= find_confirmed_client_by_name(&unconf
->cl_name
, nn
);
2301 expire_client(conf
);
2302 move_to_confirmed(unconf
);
2303 nfsd4_probe_callback(unconf
);
2306 nfs4_unlock_state();
2310 static struct nfs4_file
*nfsd4_alloc_file(void)
2312 return kmem_cache_alloc(file_slab
, GFP_KERNEL
);
2315 /* OPEN Share state helper functions */
2316 static void nfsd4_init_file(struct nfs4_file
*fp
, struct inode
*ino
)
2318 unsigned int hashval
= file_hashval(ino
);
2320 atomic_set(&fp
->fi_ref
, 1);
2321 INIT_LIST_HEAD(&fp
->fi_hash
);
2322 INIT_LIST_HEAD(&fp
->fi_stateids
);
2323 INIT_LIST_HEAD(&fp
->fi_delegations
);
2324 fp
->fi_inode
= igrab(ino
);
2325 fp
->fi_had_conflict
= false;
2326 fp
->fi_lease
= NULL
;
2327 memset(fp
->fi_fds
, 0, sizeof(fp
->fi_fds
));
2328 memset(fp
->fi_access
, 0, sizeof(fp
->fi_access
));
2329 spin_lock(&recall_lock
);
2330 list_add(&fp
->fi_hash
, &file_hashtbl
[hashval
]);
2331 spin_unlock(&recall_lock
);
2335 nfsd4_free_slab(struct kmem_cache
**slab
)
2339 kmem_cache_destroy(*slab
);
2344 nfsd4_free_slabs(void)
2346 nfsd4_free_slab(&openowner_slab
);
2347 nfsd4_free_slab(&lockowner_slab
);
2348 nfsd4_free_slab(&file_slab
);
2349 nfsd4_free_slab(&stateid_slab
);
2350 nfsd4_free_slab(&deleg_slab
);
2354 nfsd4_init_slabs(void)
2356 openowner_slab
= kmem_cache_create("nfsd4_openowners",
2357 sizeof(struct nfs4_openowner
), 0, 0, NULL
);
2358 if (openowner_slab
== NULL
)
2360 lockowner_slab
= kmem_cache_create("nfsd4_lockowners",
2361 sizeof(struct nfs4_lockowner
), 0, 0, NULL
);
2362 if (lockowner_slab
== NULL
)
2364 file_slab
= kmem_cache_create("nfsd4_files",
2365 sizeof(struct nfs4_file
), 0, 0, NULL
);
2366 if (file_slab
== NULL
)
2368 stateid_slab
= kmem_cache_create("nfsd4_stateids",
2369 sizeof(struct nfs4_ol_stateid
), 0, 0, NULL
);
2370 if (stateid_slab
== NULL
)
2372 deleg_slab
= kmem_cache_create("nfsd4_delegations",
2373 sizeof(struct nfs4_delegation
), 0, 0, NULL
);
2374 if (deleg_slab
== NULL
)
2379 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2383 void nfs4_free_openowner(struct nfs4_openowner
*oo
)
2385 kfree(oo
->oo_owner
.so_owner
.data
);
2386 kmem_cache_free(openowner_slab
, oo
);
2389 void nfs4_free_lockowner(struct nfs4_lockowner
*lo
)
2391 kfree(lo
->lo_owner
.so_owner
.data
);
2392 kmem_cache_free(lockowner_slab
, lo
);
2395 static void init_nfs4_replay(struct nfs4_replay
*rp
)
2397 rp
->rp_status
= nfserr_serverfault
;
2399 rp
->rp_buf
= rp
->rp_ibuf
;
2402 static inline void *alloc_stateowner(struct kmem_cache
*slab
, struct xdr_netobj
*owner
, struct nfs4_client
*clp
)
2404 struct nfs4_stateowner
*sop
;
2406 sop
= kmem_cache_alloc(slab
, GFP_KERNEL
);
2410 sop
->so_owner
.data
= kmemdup(owner
->data
, owner
->len
, GFP_KERNEL
);
2411 if (!sop
->so_owner
.data
) {
2412 kmem_cache_free(slab
, sop
);
2415 sop
->so_owner
.len
= owner
->len
;
2417 INIT_LIST_HEAD(&sop
->so_stateids
);
2418 sop
->so_client
= clp
;
2419 init_nfs4_replay(&sop
->so_replay
);
2423 static void hash_openowner(struct nfs4_openowner
*oo
, struct nfs4_client
*clp
, unsigned int strhashval
)
2425 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
2427 list_add(&oo
->oo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
2428 list_add(&oo
->oo_perclient
, &clp
->cl_openowners
);
2431 static struct nfs4_openowner
*
2432 alloc_init_open_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfsd4_open
*open
) {
2433 struct nfs4_openowner
*oo
;
2435 oo
= alloc_stateowner(openowner_slab
, &open
->op_owner
, clp
);
2438 oo
->oo_owner
.so_is_open_owner
= 1;
2439 oo
->oo_owner
.so_seqid
= open
->op_seqid
;
2440 oo
->oo_flags
= NFS4_OO_NEW
;
2442 oo
->oo_last_closed_stid
= NULL
;
2443 INIT_LIST_HEAD(&oo
->oo_close_lru
);
2444 hash_openowner(oo
, clp
, strhashval
);
2448 static void init_open_stateid(struct nfs4_ol_stateid
*stp
, struct nfs4_file
*fp
, struct nfsd4_open
*open
) {
2449 struct nfs4_openowner
*oo
= open
->op_openowner
;
2450 struct nfs4_client
*clp
= oo
->oo_owner
.so_client
;
2452 init_stid(&stp
->st_stid
, clp
, NFS4_OPEN_STID
);
2453 INIT_LIST_HEAD(&stp
->st_lockowners
);
2454 list_add(&stp
->st_perstateowner
, &oo
->oo_owner
.so_stateids
);
2455 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
2456 stp
->st_stateowner
= &oo
->oo_owner
;
2459 stp
->st_access_bmap
= 0;
2460 stp
->st_deny_bmap
= 0;
2461 set_access(open
->op_share_access
, stp
);
2462 set_deny(open
->op_share_deny
, stp
);
2463 stp
->st_openstp
= NULL
;
2467 move_to_close_lru(struct nfs4_openowner
*oo
, struct net
*net
)
2469 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
2471 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo
);
2473 list_move_tail(&oo
->oo_close_lru
, &nn
->close_lru
);
2474 oo
->oo_time
= get_seconds();
2478 same_owner_str(struct nfs4_stateowner
*sop
, struct xdr_netobj
*owner
,
2481 return (sop
->so_owner
.len
== owner
->len
) &&
2482 0 == memcmp(sop
->so_owner
.data
, owner
->data
, owner
->len
) &&
2483 (sop
->so_client
->cl_clientid
.cl_id
== clid
->cl_id
);
2486 static struct nfs4_openowner
*
2487 find_openstateowner_str(unsigned int hashval
, struct nfsd4_open
*open
,
2488 bool sessions
, struct nfsd_net
*nn
)
2490 struct nfs4_stateowner
*so
;
2491 struct nfs4_openowner
*oo
;
2492 struct nfs4_client
*clp
;
2494 list_for_each_entry(so
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
2495 if (!so
->so_is_open_owner
)
2497 if (same_owner_str(so
, &open
->op_owner
, &open
->op_clientid
)) {
2499 clp
= oo
->oo_owner
.so_client
;
2500 if ((bool)clp
->cl_minorversion
!= sessions
)
2502 renew_client(oo
->oo_owner
.so_client
);
2509 /* search file_hashtbl[] for file */
2510 static struct nfs4_file
*
2511 find_file(struct inode
*ino
)
2513 unsigned int hashval
= file_hashval(ino
);
2514 struct nfs4_file
*fp
;
2516 spin_lock(&recall_lock
);
2517 list_for_each_entry(fp
, &file_hashtbl
[hashval
], fi_hash
) {
2518 if (fp
->fi_inode
== ino
) {
2520 spin_unlock(&recall_lock
);
2524 spin_unlock(&recall_lock
);
2529 * Called to check deny when READ with all zero stateid or
2530 * WRITE with all zero or all one stateid
2533 nfs4_share_conflict(struct svc_fh
*current_fh
, unsigned int deny_type
)
2535 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
2536 struct nfs4_file
*fp
;
2537 struct nfs4_ol_stateid
*stp
;
2540 dprintk("NFSD: nfs4_share_conflict\n");
2542 fp
= find_file(ino
);
2545 ret
= nfserr_locked
;
2546 /* Search for conflicting share reservations */
2547 list_for_each_entry(stp
, &fp
->fi_stateids
, st_perfile
) {
2548 if (test_deny(deny_type
, stp
) ||
2549 test_deny(NFS4_SHARE_DENY_BOTH
, stp
))
2558 static void nfsd_break_one_deleg(struct nfs4_delegation
*dp
)
2560 /* We're assuming the state code never drops its reference
2561 * without first removing the lease. Since we're in this lease
2562 * callback (and since the lease code is serialized by the kernel
2563 * lock) we know the server hasn't removed the lease yet, we know
2564 * it's safe to take a reference: */
2565 atomic_inc(&dp
->dl_count
);
2567 list_add_tail(&dp
->dl_recall_lru
, &del_recall_lru
);
2569 /* only place dl_time is set. protected by lock_flocks*/
2570 dp
->dl_time
= get_seconds();
2572 nfsd4_cb_recall(dp
);
2575 /* Called from break_lease() with lock_flocks() held. */
2576 static void nfsd_break_deleg_cb(struct file_lock
*fl
)
2578 struct nfs4_file
*fp
= (struct nfs4_file
*)fl
->fl_owner
;
2579 struct nfs4_delegation
*dp
;
2582 WARN(1, "(%p)->fl_owner NULL\n", fl
);
2585 if (fp
->fi_had_conflict
) {
2586 WARN(1, "duplicate break on %p\n", fp
);
2590 * We don't want the locks code to timeout the lease for us;
2591 * we'll remove it ourself if a delegation isn't returned
2594 fl
->fl_break_time
= 0;
2596 spin_lock(&recall_lock
);
2597 fp
->fi_had_conflict
= true;
2598 list_for_each_entry(dp
, &fp
->fi_delegations
, dl_perfile
)
2599 nfsd_break_one_deleg(dp
);
2600 spin_unlock(&recall_lock
);
2604 int nfsd_change_deleg_cb(struct file_lock
**onlist
, int arg
)
2607 return lease_modify(onlist
, arg
);
2612 static const struct lock_manager_operations nfsd_lease_mng_ops
= {
2613 .lm_break
= nfsd_break_deleg_cb
,
2614 .lm_change
= nfsd_change_deleg_cb
,
2617 static __be32
nfsd4_check_seqid(struct nfsd4_compound_state
*cstate
, struct nfs4_stateowner
*so
, u32 seqid
)
2619 if (nfsd4_has_session(cstate
))
2621 if (seqid
== so
->so_seqid
- 1)
2622 return nfserr_replay_me
;
2623 if (seqid
== so
->so_seqid
)
2625 return nfserr_bad_seqid
;
2629 nfsd4_process_open1(struct nfsd4_compound_state
*cstate
,
2630 struct nfsd4_open
*open
, struct nfsd_net
*nn
)
2632 clientid_t
*clientid
= &open
->op_clientid
;
2633 struct nfs4_client
*clp
= NULL
;
2634 unsigned int strhashval
;
2635 struct nfs4_openowner
*oo
= NULL
;
2638 if (STALE_CLIENTID(&open
->op_clientid
, nn
))
2639 return nfserr_stale_clientid
;
2641 * In case we need it later, after we've already created the
2642 * file and don't want to risk a further failure:
2644 open
->op_file
= nfsd4_alloc_file();
2645 if (open
->op_file
== NULL
)
2646 return nfserr_jukebox
;
2648 strhashval
= ownerstr_hashval(clientid
->cl_id
, &open
->op_owner
);
2649 oo
= find_openstateowner_str(strhashval
, open
, cstate
->minorversion
, nn
);
2650 open
->op_openowner
= oo
;
2652 clp
= find_confirmed_client(clientid
, cstate
->minorversion
,
2655 return nfserr_expired
;
2658 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
)) {
2659 /* Replace unconfirmed owners without checking for replay. */
2660 clp
= oo
->oo_owner
.so_client
;
2661 release_openowner(oo
);
2662 open
->op_openowner
= NULL
;
2665 status
= nfsd4_check_seqid(cstate
, &oo
->oo_owner
, open
->op_seqid
);
2668 clp
= oo
->oo_owner
.so_client
;
2671 oo
= alloc_init_open_stateowner(strhashval
, clp
, open
);
2673 return nfserr_jukebox
;
2674 open
->op_openowner
= oo
;
2676 open
->op_stp
= nfs4_alloc_stateid(clp
);
2678 return nfserr_jukebox
;
2682 static inline __be32
2683 nfs4_check_delegmode(struct nfs4_delegation
*dp
, int flags
)
2685 if ((flags
& WR_STATE
) && (dp
->dl_type
== NFS4_OPEN_DELEGATE_READ
))
2686 return nfserr_openmode
;
2691 static int share_access_to_flags(u32 share_access
)
2693 return share_access
== NFS4_SHARE_ACCESS_READ
? RD_STATE
: WR_STATE
;
2696 static struct nfs4_delegation
*find_deleg_stateid(struct nfs4_client
*cl
, stateid_t
*s
)
2698 struct nfs4_stid
*ret
;
2700 ret
= find_stateid_by_type(cl
, s
, NFS4_DELEG_STID
);
2703 return delegstateid(ret
);
2706 static bool nfsd4_is_deleg_cur(struct nfsd4_open
*open
)
2708 return open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEGATE_CUR
||
2709 open
->op_claim_type
== NFS4_OPEN_CLAIM_DELEG_CUR_FH
;
2713 nfs4_check_deleg(struct nfs4_client
*cl
, struct nfs4_file
*fp
, struct nfsd4_open
*open
,
2714 struct nfs4_delegation
**dp
)
2717 __be32 status
= nfserr_bad_stateid
;
2719 *dp
= find_deleg_stateid(cl
, &open
->op_delegate_stateid
);
2722 flags
= share_access_to_flags(open
->op_share_access
);
2723 status
= nfs4_check_delegmode(*dp
, flags
);
2727 if (!nfsd4_is_deleg_cur(open
))
2731 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2736 nfs4_check_open(struct nfs4_file
*fp
, struct nfsd4_open
*open
, struct nfs4_ol_stateid
**stpp
)
2738 struct nfs4_ol_stateid
*local
;
2739 struct nfs4_openowner
*oo
= open
->op_openowner
;
2741 list_for_each_entry(local
, &fp
->fi_stateids
, st_perfile
) {
2742 /* ignore lock owners */
2743 if (local
->st_stateowner
->so_is_open_owner
== 0)
2745 /* remember if we have seen this open owner */
2746 if (local
->st_stateowner
== &oo
->oo_owner
)
2748 /* check for conflicting share reservations */
2749 if (!test_share(local
, open
))
2750 return nfserr_share_denied
;
2755 static inline int nfs4_access_to_access(u32 nfs4_access
)
2759 if (nfs4_access
& NFS4_SHARE_ACCESS_READ
)
2760 flags
|= NFSD_MAY_READ
;
2761 if (nfs4_access
& NFS4_SHARE_ACCESS_WRITE
)
2762 flags
|= NFSD_MAY_WRITE
;
2766 static __be32
nfs4_get_vfs_file(struct svc_rqst
*rqstp
, struct nfs4_file
*fp
,
2767 struct svc_fh
*cur_fh
, struct nfsd4_open
*open
)
2770 int oflag
= nfs4_access_to_omode(open
->op_share_access
);
2771 int access
= nfs4_access_to_access(open
->op_share_access
);
2773 if (!fp
->fi_fds
[oflag
]) {
2774 status
= nfsd_open(rqstp
, cur_fh
, S_IFREG
, access
,
2775 &fp
->fi_fds
[oflag
]);
2779 nfs4_file_get_access(fp
, oflag
);
2784 static inline __be32
2785 nfsd4_truncate(struct svc_rqst
*rqstp
, struct svc_fh
*fh
,
2786 struct nfsd4_open
*open
)
2788 struct iattr iattr
= {
2789 .ia_valid
= ATTR_SIZE
,
2792 if (!open
->op_truncate
)
2794 if (!(open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
))
2795 return nfserr_inval
;
2796 return nfsd_setattr(rqstp
, fh
, &iattr
, 0, (time_t)0);
2800 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
)
2802 u32 op_share_access
= open
->op_share_access
;
2806 new_access
= !test_access(op_share_access
, stp
);
2808 status
= nfs4_get_vfs_file(rqstp
, fp
, cur_fh
, open
);
2812 status
= nfsd4_truncate(rqstp
, cur_fh
, open
);
2815 int oflag
= nfs4_access_to_omode(op_share_access
);
2816 nfs4_file_put_access(fp
, oflag
);
2820 /* remember the open */
2821 set_access(op_share_access
, stp
);
2822 set_deny(open
->op_share_deny
, stp
);
2829 nfs4_set_claim_prev(struct nfsd4_open
*open
, bool has_session
)
2831 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
2834 /* Should we give out recallable state?: */
2835 static bool nfsd4_cb_channel_good(struct nfs4_client
*clp
)
2837 if (clp
->cl_cb_state
== NFSD4_CB_UP
)
2840 * In the sessions case, since we don't have to establish a
2841 * separate connection for callbacks, we assume it's OK
2842 * until we hear otherwise:
2844 return clp
->cl_minorversion
&& clp
->cl_cb_state
== NFSD4_CB_UNKNOWN
;
2847 static struct file_lock
*nfs4_alloc_init_lease(struct nfs4_delegation
*dp
, int flag
)
2849 struct file_lock
*fl
;
2851 fl
= locks_alloc_lock();
2854 locks_init_lock(fl
);
2855 fl
->fl_lmops
= &nfsd_lease_mng_ops
;
2856 fl
->fl_flags
= FL_LEASE
;
2857 fl
->fl_type
= flag
== NFS4_OPEN_DELEGATE_READ
? F_RDLCK
: F_WRLCK
;
2858 fl
->fl_end
= OFFSET_MAX
;
2859 fl
->fl_owner
= (fl_owner_t
)(dp
->dl_file
);
2860 fl
->fl_pid
= current
->tgid
;
2864 static int nfs4_setlease(struct nfs4_delegation
*dp
, int flag
)
2866 struct nfs4_file
*fp
= dp
->dl_file
;
2867 struct file_lock
*fl
;
2870 fl
= nfs4_alloc_init_lease(dp
, flag
);
2873 fl
->fl_file
= find_readable_file(fp
);
2874 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2875 status
= vfs_setlease(fl
->fl_file
, fl
->fl_type
, &fl
);
2877 list_del_init(&dp
->dl_perclnt
);
2878 locks_free_lock(fl
);
2882 fp
->fi_deleg_file
= get_file(fl
->fl_file
);
2883 atomic_set(&fp
->fi_delegees
, 1);
2884 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2888 static int nfs4_set_delegation(struct nfs4_delegation
*dp
, int flag
)
2890 struct nfs4_file
*fp
= dp
->dl_file
;
2893 return nfs4_setlease(dp
, flag
);
2894 spin_lock(&recall_lock
);
2895 if (fp
->fi_had_conflict
) {
2896 spin_unlock(&recall_lock
);
2899 atomic_inc(&fp
->fi_delegees
);
2900 list_add(&dp
->dl_perfile
, &fp
->fi_delegations
);
2901 spin_unlock(&recall_lock
);
2902 list_add(&dp
->dl_perclnt
, &dp
->dl_stid
.sc_client
->cl_delegations
);
2906 static void nfsd4_open_deleg_none_ext(struct nfsd4_open
*open
, int status
)
2908 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
2909 if (status
== -EAGAIN
)
2910 open
->op_why_no_deleg
= WND4_CONTENTION
;
2912 open
->op_why_no_deleg
= WND4_RESOURCE
;
2913 switch (open
->op_deleg_want
) {
2914 case NFS4_SHARE_WANT_READ_DELEG
:
2915 case NFS4_SHARE_WANT_WRITE_DELEG
:
2916 case NFS4_SHARE_WANT_ANY_DELEG
:
2918 case NFS4_SHARE_WANT_CANCEL
:
2919 open
->op_why_no_deleg
= WND4_CANCELLED
;
2921 case NFS4_SHARE_WANT_NO_DELEG
:
2928 * Attempt to hand out a delegation.
2931 nfs4_open_delegation(struct net
*net
, struct svc_fh
*fh
,
2932 struct nfsd4_open
*open
, struct nfs4_ol_stateid
*stp
)
2934 struct nfs4_delegation
*dp
;
2935 struct nfs4_openowner
*oo
= container_of(stp
->st_stateowner
, struct nfs4_openowner
, oo_owner
);
2937 int status
= 0, flag
= 0;
2939 cb_up
= nfsd4_cb_channel_good(oo
->oo_owner
.so_client
);
2940 flag
= NFS4_OPEN_DELEGATE_NONE
;
2941 open
->op_recall
= 0;
2942 switch (open
->op_claim_type
) {
2943 case NFS4_OPEN_CLAIM_PREVIOUS
:
2945 open
->op_recall
= 1;
2946 flag
= open
->op_delegate_type
;
2947 if (flag
== NFS4_OPEN_DELEGATE_NONE
)
2950 case NFS4_OPEN_CLAIM_NULL
:
2951 /* Let's not give out any delegations till everyone's
2952 * had the chance to reclaim theirs.... */
2953 if (locks_in_grace(net
))
2955 if (!cb_up
|| !(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
2957 if (open
->op_share_access
& NFS4_SHARE_ACCESS_WRITE
)
2958 flag
= NFS4_OPEN_DELEGATE_WRITE
;
2960 flag
= NFS4_OPEN_DELEGATE_READ
;
2966 dp
= alloc_init_deleg(oo
->oo_owner
.so_client
, stp
, fh
, flag
);
2969 status
= nfs4_set_delegation(dp
, flag
);
2973 memcpy(&open
->op_delegate_stateid
, &dp
->dl_stid
.sc_stateid
, sizeof(dp
->dl_stid
.sc_stateid
));
2975 dprintk("NFSD: delegation stateid=" STATEID_FMT
"\n",
2976 STATEID_VAL(&dp
->dl_stid
.sc_stateid
));
2978 open
->op_delegate_type
= flag
;
2979 if (flag
== NFS4_OPEN_DELEGATE_NONE
) {
2980 if (open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
&&
2981 open
->op_delegate_type
!= NFS4_OPEN_DELEGATE_NONE
)
2982 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
2984 /* 4.1 client asking for a delegation? */
2985 if (open
->op_deleg_want
)
2986 nfsd4_open_deleg_none_ext(open
, status
);
2990 nfs4_put_delegation(dp
);
2992 flag
= NFS4_OPEN_DELEGATE_NONE
;
2996 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open
*open
,
2997 struct nfs4_delegation
*dp
)
2999 if (open
->op_deleg_want
== NFS4_SHARE_WANT_READ_DELEG
&&
3000 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3001 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3002 open
->op_why_no_deleg
= WND4_NOT_SUPP_DOWNGRADE
;
3003 } else if (open
->op_deleg_want
== NFS4_SHARE_WANT_WRITE_DELEG
&&
3004 dp
->dl_type
== NFS4_OPEN_DELEGATE_WRITE
) {
3005 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3006 open
->op_why_no_deleg
= WND4_NOT_SUPP_UPGRADE
;
3008 /* Otherwise the client must be confused wanting a delegation
3009 * it already has, therefore we don't return
3010 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3015 * called with nfs4_lock_state() held.
3018 nfsd4_process_open2(struct svc_rqst
*rqstp
, struct svc_fh
*current_fh
, struct nfsd4_open
*open
)
3020 struct nfsd4_compoundres
*resp
= rqstp
->rq_resp
;
3021 struct nfs4_client
*cl
= open
->op_openowner
->oo_owner
.so_client
;
3022 struct nfs4_file
*fp
= NULL
;
3023 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3024 struct nfs4_ol_stateid
*stp
= NULL
;
3025 struct nfs4_delegation
*dp
= NULL
;
3029 * Lookup file; if found, lookup stateid and check open request,
3030 * and check for delegations in the process of being recalled.
3031 * If not found, create the nfs4_file struct
3033 fp
= find_file(ino
);
3035 if ((status
= nfs4_check_open(fp
, open
, &stp
)))
3037 status
= nfs4_check_deleg(cl
, fp
, open
, &dp
);
3041 status
= nfserr_bad_stateid
;
3042 if (nfsd4_is_deleg_cur(open
))
3044 status
= nfserr_jukebox
;
3046 open
->op_file
= NULL
;
3047 nfsd4_init_file(fp
, ino
);
3051 * OPEN the file, or upgrade an existing OPEN.
3052 * If truncate fails, the OPEN fails.
3055 /* Stateid was found, this is an OPEN upgrade */
3056 status
= nfs4_upgrade_open(rqstp
, fp
, current_fh
, stp
, open
);
3060 status
= nfs4_get_vfs_file(rqstp
, fp
, current_fh
, open
);
3063 status
= nfsd4_truncate(rqstp
, current_fh
, open
);
3067 open
->op_stp
= NULL
;
3068 init_open_stateid(stp
, fp
, open
);
3070 update_stateid(&stp
->st_stid
.sc_stateid
);
3071 memcpy(&open
->op_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3073 if (nfsd4_has_session(&resp
->cstate
)) {
3074 open
->op_openowner
->oo_flags
|= NFS4_OO_CONFIRMED
;
3076 if (open
->op_deleg_want
& NFS4_SHARE_WANT_NO_DELEG
) {
3077 open
->op_delegate_type
= NFS4_OPEN_DELEGATE_NONE_EXT
;
3078 open
->op_why_no_deleg
= WND4_NOT_WANTED
;
3084 * Attempt to hand out a delegation. No error return, because the
3085 * OPEN succeeds even if we fail.
3087 nfs4_open_delegation(SVC_NET(rqstp
), current_fh
, open
, stp
);
3091 dprintk("%s: stateid=" STATEID_FMT
"\n", __func__
,
3092 STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3094 /* 4.1 client trying to upgrade/downgrade delegation? */
3095 if (open
->op_delegate_type
== NFS4_OPEN_DELEGATE_NONE
&& dp
&&
3096 open
->op_deleg_want
)
3097 nfsd4_deleg_xgrade_none_ext(open
, dp
);
3101 if (status
== 0 && open
->op_claim_type
== NFS4_OPEN_CLAIM_PREVIOUS
)
3102 nfs4_set_claim_prev(open
, nfsd4_has_session(&resp
->cstate
));
3104 * To finish the open response, we just need to set the rflags.
3106 open
->op_rflags
= NFS4_OPEN_RESULT_LOCKTYPE_POSIX
;
3107 if (!(open
->op_openowner
->oo_flags
& NFS4_OO_CONFIRMED
) &&
3108 !nfsd4_has_session(&resp
->cstate
))
3109 open
->op_rflags
|= NFS4_OPEN_RESULT_CONFIRM
;
3114 void nfsd4_cleanup_open_state(struct nfsd4_open
*open
, __be32 status
)
3116 if (open
->op_openowner
) {
3117 struct nfs4_openowner
*oo
= open
->op_openowner
;
3119 if (!list_empty(&oo
->oo_owner
.so_stateids
))
3120 list_del_init(&oo
->oo_close_lru
);
3121 if (oo
->oo_flags
& NFS4_OO_NEW
) {
3123 release_openowner(oo
);
3124 open
->op_openowner
= NULL
;
3126 oo
->oo_flags
&= ~NFS4_OO_NEW
;
3130 nfsd4_free_file(open
->op_file
);
3132 free_generic_stateid(open
->op_stp
);
3135 static __be32
lookup_clientid(clientid_t
*clid
, bool session
, struct nfsd_net
*nn
, struct nfs4_client
**clp
)
3137 struct nfs4_client
*found
;
3139 if (STALE_CLIENTID(clid
, nn
))
3140 return nfserr_stale_clientid
;
3141 found
= find_confirmed_client(clid
, session
, nn
);
3144 return found
? nfs_ok
: nfserr_expired
;
3148 nfsd4_renew(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3151 struct nfs4_client
*clp
;
3153 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3156 dprintk("process_renew(%08x/%08x): starting\n",
3157 clid
->cl_boot
, clid
->cl_id
);
3158 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, &clp
);
3161 status
= nfserr_cb_path_down
;
3162 if (!list_empty(&clp
->cl_delegations
)
3163 && clp
->cl_cb_state
!= NFSD4_CB_UP
)
3167 nfs4_unlock_state();
3172 nfsd4_end_grace(struct nfsd_net
*nn
)
3174 /* do nothing if grace period already ended */
3175 if (nn
->grace_ended
)
3178 dprintk("NFSD: end of grace period\n");
3179 nn
->grace_ended
= true;
3180 nfsd4_record_grace_done(nn
, nn
->boot_time
);
3181 locks_end_grace(&nn
->nfsd4_manager
);
3183 * Now that every NFSv4 client has had the chance to recover and
3184 * to see the (possibly new, possibly shorter) lease time, we
3185 * can safely set the next grace time to the current lease time:
3187 nn
->nfsd4_grace
= nn
->nfsd4_lease
;
3191 nfs4_laundromat(struct nfsd_net
*nn
)
3193 struct nfs4_client
*clp
;
3194 struct nfs4_openowner
*oo
;
3195 struct nfs4_delegation
*dp
;
3196 struct list_head
*pos
, *next
, reaplist
;
3197 time_t cutoff
= get_seconds() - nn
->nfsd4_lease
;
3198 time_t t
, clientid_val
= nn
->nfsd4_lease
;
3199 time_t u
, test_val
= nn
->nfsd4_lease
;
3203 dprintk("NFSD: laundromat service - starting\n");
3204 nfsd4_end_grace(nn
);
3205 INIT_LIST_HEAD(&reaplist
);
3206 spin_lock(&nn
->client_lock
);
3207 list_for_each_safe(pos
, next
, &nn
->client_lru
) {
3208 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3209 if (time_after((unsigned long)clp
->cl_time
, (unsigned long)cutoff
)) {
3210 t
= clp
->cl_time
- cutoff
;
3211 if (clientid_val
> t
)
3215 if (atomic_read(&clp
->cl_refcount
)) {
3216 dprintk("NFSD: client in use (clientid %08x)\n",
3217 clp
->cl_clientid
.cl_id
);
3220 unhash_client_locked(clp
);
3221 list_add(&clp
->cl_lru
, &reaplist
);
3223 spin_unlock(&nn
->client_lock
);
3224 list_for_each_safe(pos
, next
, &reaplist
) {
3225 clp
= list_entry(pos
, struct nfs4_client
, cl_lru
);
3226 dprintk("NFSD: purging unused client (clientid %08x)\n",
3227 clp
->cl_clientid
.cl_id
);
3230 spin_lock(&recall_lock
);
3231 list_for_each_safe(pos
, next
, &del_recall_lru
) {
3232 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3233 if (net_generic(dp
->dl_stid
.sc_client
->net
, nfsd_net_id
) != nn
)
3235 if (time_after((unsigned long)dp
->dl_time
, (unsigned long)cutoff
)) {
3236 u
= dp
->dl_time
- cutoff
;
3241 list_move(&dp
->dl_recall_lru
, &reaplist
);
3243 spin_unlock(&recall_lock
);
3244 list_for_each_safe(pos
, next
, &reaplist
) {
3245 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
3246 unhash_delegation(dp
);
3248 test_val
= nn
->nfsd4_lease
;
3249 list_for_each_safe(pos
, next
, &nn
->close_lru
) {
3250 oo
= container_of(pos
, struct nfs4_openowner
, oo_close_lru
);
3251 if (time_after((unsigned long)oo
->oo_time
, (unsigned long)cutoff
)) {
3252 u
= oo
->oo_time
- cutoff
;
3257 release_openowner(oo
);
3259 if (clientid_val
< NFSD_LAUNDROMAT_MINTIMEOUT
)
3260 clientid_val
= NFSD_LAUNDROMAT_MINTIMEOUT
;
3261 nfs4_unlock_state();
3262 return clientid_val
;
3265 static struct workqueue_struct
*laundry_wq
;
3266 static void laundromat_main(struct work_struct
*);
3269 laundromat_main(struct work_struct
*laundry
)
3272 struct delayed_work
*dwork
= container_of(laundry
, struct delayed_work
,
3274 struct nfsd_net
*nn
= container_of(dwork
, struct nfsd_net
,
3277 t
= nfs4_laundromat(nn
);
3278 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t
);
3279 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, t
*HZ
);
3282 static inline __be32
nfs4_check_fh(struct svc_fh
*fhp
, struct nfs4_ol_stateid
*stp
)
3284 if (fhp
->fh_dentry
->d_inode
!= stp
->st_file
->fi_inode
)
3285 return nfserr_bad_stateid
;
3290 STALE_STATEID(stateid_t
*stateid
, struct nfsd_net
*nn
)
3292 if (stateid
->si_opaque
.so_clid
.cl_boot
== nn
->boot_time
)
3294 dprintk("NFSD: stale stateid " STATEID_FMT
"!\n",
3295 STATEID_VAL(stateid
));
3300 access_permit_read(struct nfs4_ol_stateid
*stp
)
3302 return test_access(NFS4_SHARE_ACCESS_READ
, stp
) ||
3303 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
) ||
3304 test_access(NFS4_SHARE_ACCESS_WRITE
, stp
);
3308 access_permit_write(struct nfs4_ol_stateid
*stp
)
3310 return test_access(NFS4_SHARE_ACCESS_WRITE
, stp
) ||
3311 test_access(NFS4_SHARE_ACCESS_BOTH
, stp
);
3315 __be32
nfs4_check_openmode(struct nfs4_ol_stateid
*stp
, int flags
)
3317 __be32 status
= nfserr_openmode
;
3319 /* For lock stateid's, we test the parent open, not the lock: */
3320 if (stp
->st_openstp
)
3321 stp
= stp
->st_openstp
;
3322 if ((flags
& WR_STATE
) && !access_permit_write(stp
))
3324 if ((flags
& RD_STATE
) && !access_permit_read(stp
))
3331 static inline __be32
3332 check_special_stateids(struct net
*net
, svc_fh
*current_fh
, stateid_t
*stateid
, int flags
)
3334 if (ONE_STATEID(stateid
) && (flags
& RD_STATE
))
3336 else if (locks_in_grace(net
)) {
3337 /* Answer in remaining cases depends on existence of
3338 * conflicting state; so we must wait out the grace period. */
3339 return nfserr_grace
;
3340 } else if (flags
& WR_STATE
)
3341 return nfs4_share_conflict(current_fh
,
3342 NFS4_SHARE_DENY_WRITE
);
3343 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3344 return nfs4_share_conflict(current_fh
,
3345 NFS4_SHARE_DENY_READ
);
3349 * Allow READ/WRITE during grace period on recovered state only for files
3350 * that are not able to provide mandatory locking.
3353 grace_disallows_io(struct net
*net
, struct inode
*inode
)
3355 return locks_in_grace(net
) && mandatory_lock(inode
);
3358 /* Returns true iff a is later than b: */
3359 static bool stateid_generation_after(stateid_t
*a
, stateid_t
*b
)
3361 return (s32
)a
->si_generation
- (s32
)b
->si_generation
> 0;
3364 static __be32
check_stateid_generation(stateid_t
*in
, stateid_t
*ref
, bool has_session
)
3367 * When sessions are used the stateid generation number is ignored
3370 if (has_session
&& in
->si_generation
== 0)
3373 if (in
->si_generation
== ref
->si_generation
)
3376 /* If the client sends us a stateid from the future, it's buggy: */
3377 if (stateid_generation_after(in
, ref
))
3378 return nfserr_bad_stateid
;
3380 * However, we could see a stateid from the past, even from a
3381 * non-buggy client. For example, if the client sends a lock
3382 * while some IO is outstanding, the lock may bump si_generation
3383 * while the IO is still in flight. The client could avoid that
3384 * situation by waiting for responses on all the IO requests,
3385 * but better performance may result in retrying IO that
3386 * receives an old_stateid error if requests are rarely
3387 * reordered in flight:
3389 return nfserr_old_stateid
;
3392 static __be32
nfsd4_validate_stateid(struct nfs4_client
*cl
, stateid_t
*stateid
)
3394 struct nfs4_stid
*s
;
3395 struct nfs4_ol_stateid
*ols
;
3398 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3399 return nfserr_bad_stateid
;
3400 /* Client debugging aid. */
3401 if (!same_clid(&stateid
->si_opaque
.so_clid
, &cl
->cl_clientid
)) {
3402 char addr_str
[INET6_ADDRSTRLEN
];
3403 rpc_ntop((struct sockaddr
*)&cl
->cl_addr
, addr_str
,
3405 pr_warn_ratelimited("NFSD: client %s testing state ID "
3406 "with incorrect client ID\n", addr_str
);
3407 return nfserr_bad_stateid
;
3409 s
= find_stateid(cl
, stateid
);
3411 return nfserr_bad_stateid
;
3412 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3415 if (!(s
->sc_type
& (NFS4_OPEN_STID
| NFS4_LOCK_STID
)))
3417 ols
= openlockstateid(s
);
3418 if (ols
->st_stateowner
->so_is_open_owner
3419 && !(openowner(ols
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3420 return nfserr_bad_stateid
;
3424 static __be32
nfsd4_lookup_stateid(stateid_t
*stateid
, unsigned char typemask
,
3425 struct nfs4_stid
**s
, bool sessions
,
3426 struct nfsd_net
*nn
)
3428 struct nfs4_client
*cl
;
3430 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3431 return nfserr_bad_stateid
;
3432 if (STALE_STATEID(stateid
, nn
))
3433 return nfserr_stale_stateid
;
3434 cl
= find_confirmed_client(&stateid
->si_opaque
.so_clid
, sessions
, nn
);
3436 return nfserr_expired
;
3437 *s
= find_stateid_by_type(cl
, stateid
, typemask
);
3439 return nfserr_bad_stateid
;
3445 * Checks for stateid operations
3448 nfs4_preprocess_stateid_op(struct net
*net
, struct nfsd4_compound_state
*cstate
,
3449 stateid_t
*stateid
, int flags
, struct file
**filpp
)
3451 struct nfs4_stid
*s
;
3452 struct nfs4_ol_stateid
*stp
= NULL
;
3453 struct nfs4_delegation
*dp
= NULL
;
3454 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3455 struct inode
*ino
= current_fh
->fh_dentry
->d_inode
;
3456 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3462 if (grace_disallows_io(net
, ino
))
3463 return nfserr_grace
;
3465 if (ZERO_STATEID(stateid
) || ONE_STATEID(stateid
))
3466 return check_special_stateids(net
, current_fh
, stateid
, flags
);
3468 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
|NFS4_OPEN_STID
|NFS4_LOCK_STID
,
3469 &s
, cstate
->minorversion
, nn
);
3472 status
= check_stateid_generation(stateid
, &s
->sc_stateid
, nfsd4_has_session(cstate
));
3475 switch (s
->sc_type
) {
3476 case NFS4_DELEG_STID
:
3477 dp
= delegstateid(s
);
3478 status
= nfs4_check_delegmode(dp
, flags
);
3482 *filpp
= dp
->dl_file
->fi_deleg_file
;
3485 status
= nfserr_serverfault
;
3490 case NFS4_OPEN_STID
:
3491 case NFS4_LOCK_STID
:
3492 stp
= openlockstateid(s
);
3493 status
= nfs4_check_fh(current_fh
, stp
);
3496 if (stp
->st_stateowner
->so_is_open_owner
3497 && !(openowner(stp
->st_stateowner
)->oo_flags
& NFS4_OO_CONFIRMED
))
3499 status
= nfs4_check_openmode(stp
, flags
);
3503 if (flags
& RD_STATE
)
3504 *filpp
= find_readable_file(stp
->st_file
);
3506 *filpp
= find_writeable_file(stp
->st_file
);
3510 return nfserr_bad_stateid
;
3518 nfsd4_free_lock_stateid(struct nfs4_ol_stateid
*stp
)
3520 if (check_for_locks(stp
->st_file
, lockowner(stp
->st_stateowner
)))
3521 return nfserr_locks_held
;
3522 release_lock_stateid(stp
);
3527 * Test if the stateid is valid
3530 nfsd4_test_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3531 struct nfsd4_test_stateid
*test_stateid
)
3533 struct nfsd4_test_stateid_id
*stateid
;
3534 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3537 list_for_each_entry(stateid
, &test_stateid
->ts_stateid_list
, ts_id_list
)
3538 stateid
->ts_id_status
=
3539 nfsd4_validate_stateid(cl
, &stateid
->ts_id_stateid
);
3540 nfs4_unlock_state();
3546 nfsd4_free_stateid(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3547 struct nfsd4_free_stateid
*free_stateid
)
3549 stateid_t
*stateid
= &free_stateid
->fr_stateid
;
3550 struct nfs4_stid
*s
;
3551 struct nfs4_client
*cl
= cstate
->session
->se_client
;
3552 __be32 ret
= nfserr_bad_stateid
;
3555 s
= find_stateid(cl
, stateid
);
3558 switch (s
->sc_type
) {
3559 case NFS4_DELEG_STID
:
3560 ret
= nfserr_locks_held
;
3562 case NFS4_OPEN_STID
:
3563 case NFS4_LOCK_STID
:
3564 ret
= check_stateid_generation(stateid
, &s
->sc_stateid
, 1);
3567 if (s
->sc_type
== NFS4_LOCK_STID
)
3568 ret
= nfsd4_free_lock_stateid(openlockstateid(s
));
3570 ret
= nfserr_locks_held
;
3573 ret
= nfserr_bad_stateid
;
3576 nfs4_unlock_state();
3583 return (type
== NFS4_READW_LT
|| type
== NFS4_READ_LT
) ?
3584 RD_STATE
: WR_STATE
;
3587 static __be32
nfs4_seqid_op_checks(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
, u32 seqid
, struct nfs4_ol_stateid
*stp
)
3589 struct svc_fh
*current_fh
= &cstate
->current_fh
;
3590 struct nfs4_stateowner
*sop
= stp
->st_stateowner
;
3593 status
= nfsd4_check_seqid(cstate
, sop
, seqid
);
3596 if (stp
->st_stid
.sc_type
== NFS4_CLOSED_STID
)
3598 * "Closed" stateid's exist *only* to return
3599 * nfserr_replay_me from the previous step.
3601 return nfserr_bad_stateid
;
3602 status
= check_stateid_generation(stateid
, &stp
->st_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3605 return nfs4_check_fh(current_fh
, stp
);
3609 * Checks for sequence id mutating operations.
3612 nfs4_preprocess_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3613 stateid_t
*stateid
, char typemask
,
3614 struct nfs4_ol_stateid
**stpp
,
3615 struct nfsd_net
*nn
)
3618 struct nfs4_stid
*s
;
3620 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT
"\n", __func__
,
3621 seqid
, STATEID_VAL(stateid
));
3624 status
= nfsd4_lookup_stateid(stateid
, typemask
, &s
,
3625 cstate
->minorversion
, nn
);
3628 *stpp
= openlockstateid(s
);
3629 cstate
->replay_owner
= (*stpp
)->st_stateowner
;
3631 return nfs4_seqid_op_checks(cstate
, stateid
, seqid
, *stpp
);
3634 static __be32
nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state
*cstate
, u32 seqid
,
3635 stateid_t
*stateid
, struct nfs4_ol_stateid
**stpp
, struct nfsd_net
*nn
)
3638 struct nfs4_openowner
*oo
;
3640 status
= nfs4_preprocess_seqid_op(cstate
, seqid
, stateid
,
3641 NFS4_OPEN_STID
, stpp
, nn
);
3644 oo
= openowner((*stpp
)->st_stateowner
);
3645 if (!(oo
->oo_flags
& NFS4_OO_CONFIRMED
))
3646 return nfserr_bad_stateid
;
3651 nfsd4_open_confirm(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3652 struct nfsd4_open_confirm
*oc
)
3655 struct nfs4_openowner
*oo
;
3656 struct nfs4_ol_stateid
*stp
;
3657 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3659 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
3660 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3661 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3663 status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0);
3669 status
= nfs4_preprocess_seqid_op(cstate
,
3670 oc
->oc_seqid
, &oc
->oc_req_stateid
,
3671 NFS4_OPEN_STID
, &stp
, nn
);
3674 oo
= openowner(stp
->st_stateowner
);
3675 status
= nfserr_bad_stateid
;
3676 if (oo
->oo_flags
& NFS4_OO_CONFIRMED
)
3678 oo
->oo_flags
|= NFS4_OO_CONFIRMED
;
3679 update_stateid(&stp
->st_stid
.sc_stateid
);
3680 memcpy(&oc
->oc_resp_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3681 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT
"\n",
3682 __func__
, oc
->oc_seqid
, STATEID_VAL(&stp
->st_stid
.sc_stateid
));
3684 nfsd4_client_record_create(oo
->oo_owner
.so_client
);
3687 if (!cstate
->replay_owner
)
3688 nfs4_unlock_state();
3692 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid
*stp
, u32 access
)
3694 if (!test_access(access
, stp
))
3696 nfs4_file_put_access(stp
->st_file
, nfs4_access_to_omode(access
));
3697 clear_access(access
, stp
);
3700 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid
*stp
, u32 to_access
)
3702 switch (to_access
) {
3703 case NFS4_SHARE_ACCESS_READ
:
3704 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_WRITE
);
3705 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3707 case NFS4_SHARE_ACCESS_WRITE
:
3708 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_READ
);
3709 nfs4_stateid_downgrade_bit(stp
, NFS4_SHARE_ACCESS_BOTH
);
3711 case NFS4_SHARE_ACCESS_BOTH
:
3719 reset_union_bmap_deny(unsigned long deny
, struct nfs4_ol_stateid
*stp
)
3722 for (i
= 0; i
< 4; i
++) {
3723 if ((i
& deny
) != i
)
3729 nfsd4_open_downgrade(struct svc_rqst
*rqstp
,
3730 struct nfsd4_compound_state
*cstate
,
3731 struct nfsd4_open_downgrade
*od
)
3734 struct nfs4_ol_stateid
*stp
;
3735 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3737 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
3738 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3739 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3741 /* We don't yet support WANT bits: */
3742 if (od
->od_deleg_want
)
3743 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__
,
3747 status
= nfs4_preprocess_confirmed_seqid_op(cstate
, od
->od_seqid
,
3748 &od
->od_stateid
, &stp
, nn
);
3751 status
= nfserr_inval
;
3752 if (!test_access(od
->od_share_access
, stp
)) {
3753 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
3754 stp
->st_access_bmap
, od
->od_share_access
);
3757 if (!test_deny(od
->od_share_deny
, stp
)) {
3758 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
3759 stp
->st_deny_bmap
, od
->od_share_deny
);
3762 nfs4_stateid_downgrade(stp
, od
->od_share_access
);
3764 reset_union_bmap_deny(od
->od_share_deny
, stp
);
3766 update_stateid(&stp
->st_stid
.sc_stateid
);
3767 memcpy(&od
->od_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3770 if (!cstate
->replay_owner
)
3771 nfs4_unlock_state();
3775 void nfsd4_purge_closed_stateid(struct nfs4_stateowner
*so
)
3777 struct nfs4_openowner
*oo
;
3778 struct nfs4_ol_stateid
*s
;
3780 if (!so
->so_is_open_owner
)
3783 s
= oo
->oo_last_closed_stid
;
3786 if (!(oo
->oo_flags
& NFS4_OO_PURGE_CLOSE
)) {
3787 /* Release the last_closed_stid on the next seqid bump: */
3788 oo
->oo_flags
|= NFS4_OO_PURGE_CLOSE
;
3791 oo
->oo_flags
&= ~NFS4_OO_PURGE_CLOSE
;
3792 release_last_closed_stateid(oo
);
3795 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid
*s
)
3797 unhash_open_stateid(s
);
3798 s
->st_stid
.sc_type
= NFS4_CLOSED_STID
;
3802 * nfs4_unlock_state() called after encode
3805 nfsd4_close(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3806 struct nfsd4_close
*close
)
3809 struct nfs4_openowner
*oo
;
3810 struct nfs4_ol_stateid
*stp
;
3811 struct net
*net
= SVC_NET(rqstp
);
3812 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
3814 dprintk("NFSD: nfsd4_close on file %.*s\n",
3815 (int)cstate
->current_fh
.fh_dentry
->d_name
.len
,
3816 cstate
->current_fh
.fh_dentry
->d_name
.name
);
3819 status
= nfs4_preprocess_seqid_op(cstate
, close
->cl_seqid
,
3821 NFS4_OPEN_STID
|NFS4_CLOSED_STID
,
3825 oo
= openowner(stp
->st_stateowner
);
3827 update_stateid(&stp
->st_stid
.sc_stateid
);
3828 memcpy(&close
->cl_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
3830 nfsd4_close_open_stateid(stp
);
3831 release_last_closed_stateid(oo
);
3832 oo
->oo_last_closed_stid
= stp
;
3834 if (list_empty(&oo
->oo_owner
.so_stateids
)) {
3835 if (cstate
->minorversion
) {
3836 release_openowner(oo
);
3837 cstate
->replay_owner
= NULL
;
3840 * In the 4.0 case we need to keep the owners around a
3841 * little while to handle CLOSE replay.
3843 if (list_empty(&oo
->oo_owner
.so_stateids
))
3844 move_to_close_lru(oo
, SVC_NET(rqstp
));
3848 if (!cstate
->replay_owner
)
3849 nfs4_unlock_state();
3854 nfsd4_delegreturn(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
3855 struct nfsd4_delegreturn
*dr
)
3857 struct nfs4_delegation
*dp
;
3858 stateid_t
*stateid
= &dr
->dr_stateid
;
3859 struct nfs4_stid
*s
;
3861 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
3863 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
3867 status
= nfsd4_lookup_stateid(stateid
, NFS4_DELEG_STID
, &s
,
3868 cstate
->minorversion
, nn
);
3871 dp
= delegstateid(s
);
3872 status
= check_stateid_generation(stateid
, &dp
->dl_stid
.sc_stateid
, nfsd4_has_session(cstate
));
3876 unhash_delegation(dp
);
3878 nfs4_unlock_state();
3884 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
3886 #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1)
3889 end_offset(u64 start
, u64 len
)
3894 return end
>= start
? end
: NFS4_MAX_UINT64
;
3897 /* last octet in a range */
3899 last_byte_offset(u64 start
, u64 len
)
3905 return end
> start
? end
- 1: NFS4_MAX_UINT64
;
3908 static unsigned int lockowner_ino_hashval(struct inode
*inode
, u32 cl_id
, struct xdr_netobj
*ownername
)
3910 return (file_hashval(inode
) + cl_id
3911 + opaque_hashval(ownername
->data
, ownername
->len
))
3912 & LOCKOWNER_INO_HASH_MASK
;
3916 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
3917 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
3918 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
3919 * locking, this prevents us from being completely protocol-compliant. The
3920 * real solution to this problem is to start using unsigned file offsets in
3921 * the VFS, but this is a very deep change!
3924 nfs4_transform_lock_offset(struct file_lock
*lock
)
3926 if (lock
->fl_start
< 0)
3927 lock
->fl_start
= OFFSET_MAX
;
3928 if (lock
->fl_end
< 0)
3929 lock
->fl_end
= OFFSET_MAX
;
3932 /* Hack!: For now, we're defining this just so we can use a pointer to it
3933 * as a unique cookie to identify our (NFSv4's) posix locks. */
3934 static const struct lock_manager_operations nfsd_posix_mng_ops
= {
3938 nfs4_set_lock_denied(struct file_lock
*fl
, struct nfsd4_lock_denied
*deny
)
3940 struct nfs4_lockowner
*lo
;
3942 if (fl
->fl_lmops
== &nfsd_posix_mng_ops
) {
3943 lo
= (struct nfs4_lockowner
*) fl
->fl_owner
;
3944 deny
->ld_owner
.data
= kmemdup(lo
->lo_owner
.so_owner
.data
,
3945 lo
->lo_owner
.so_owner
.len
, GFP_KERNEL
);
3946 if (!deny
->ld_owner
.data
)
3947 /* We just don't care that much */
3949 deny
->ld_owner
.len
= lo
->lo_owner
.so_owner
.len
;
3950 deny
->ld_clientid
= lo
->lo_owner
.so_client
->cl_clientid
;
3953 deny
->ld_owner
.len
= 0;
3954 deny
->ld_owner
.data
= NULL
;
3955 deny
->ld_clientid
.cl_boot
= 0;
3956 deny
->ld_clientid
.cl_id
= 0;
3958 deny
->ld_start
= fl
->fl_start
;
3959 deny
->ld_length
= NFS4_MAX_UINT64
;
3960 if (fl
->fl_end
!= NFS4_MAX_UINT64
)
3961 deny
->ld_length
= fl
->fl_end
- fl
->fl_start
+ 1;
3962 deny
->ld_type
= NFS4_READ_LT
;
3963 if (fl
->fl_type
!= F_RDLCK
)
3964 deny
->ld_type
= NFS4_WRITE_LT
;
3967 static bool same_lockowner_ino(struct nfs4_lockowner
*lo
, struct inode
*inode
, clientid_t
*clid
, struct xdr_netobj
*owner
)
3969 struct nfs4_ol_stateid
*lst
;
3971 if (!same_owner_str(&lo
->lo_owner
, owner
, clid
))
3973 lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
3974 struct nfs4_ol_stateid
, st_perstateowner
);
3975 return lst
->st_file
->fi_inode
== inode
;
3978 static struct nfs4_lockowner
*
3979 find_lockowner_str(struct inode
*inode
, clientid_t
*clid
,
3980 struct xdr_netobj
*owner
, struct nfsd_net
*nn
)
3982 unsigned int hashval
= lockowner_ino_hashval(inode
, clid
->cl_id
, owner
);
3983 struct nfs4_lockowner
*lo
;
3985 list_for_each_entry(lo
, &nn
->lockowner_ino_hashtbl
[hashval
], lo_owner_ino_hash
) {
3986 if (same_lockowner_ino(lo
, inode
, clid
, owner
))
3992 static void hash_lockowner(struct nfs4_lockowner
*lo
, unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
)
3994 struct inode
*inode
= open_stp
->st_file
->fi_inode
;
3995 unsigned int inohash
= lockowner_ino_hashval(inode
,
3996 clp
->cl_clientid
.cl_id
, &lo
->lo_owner
.so_owner
);
3997 struct nfsd_net
*nn
= net_generic(clp
->net
, nfsd_net_id
);
3999 list_add(&lo
->lo_owner
.so_strhash
, &nn
->ownerstr_hashtbl
[strhashval
]);
4000 list_add(&lo
->lo_owner_ino_hash
, &nn
->lockowner_ino_hashtbl
[inohash
]);
4001 list_add(&lo
->lo_perstateid
, &open_stp
->st_lockowners
);
4005 * Alloc a lock owner structure.
4006 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4009 * strhashval = ownerstr_hashval
4012 static struct nfs4_lockowner
*
4013 alloc_init_lock_stateowner(unsigned int strhashval
, struct nfs4_client
*clp
, struct nfs4_ol_stateid
*open_stp
, struct nfsd4_lock
*lock
) {
4014 struct nfs4_lockowner
*lo
;
4016 lo
= alloc_stateowner(lockowner_slab
, &lock
->lk_new_owner
, clp
);
4019 INIT_LIST_HEAD(&lo
->lo_owner
.so_stateids
);
4020 lo
->lo_owner
.so_is_open_owner
= 0;
4021 /* It is the openowner seqid that will be incremented in encode in the
4022 * case of new lockowners; so increment the lock seqid manually: */
4023 lo
->lo_owner
.so_seqid
= lock
->lk_new_lock_seqid
+ 1;
4024 hash_lockowner(lo
, strhashval
, clp
, open_stp
);
4028 static struct nfs4_ol_stateid
*
4029 alloc_init_lock_stateid(struct nfs4_lockowner
*lo
, struct nfs4_file
*fp
, struct nfs4_ol_stateid
*open_stp
)
4031 struct nfs4_ol_stateid
*stp
;
4032 struct nfs4_client
*clp
= lo
->lo_owner
.so_client
;
4034 stp
= nfs4_alloc_stateid(clp
);
4037 init_stid(&stp
->st_stid
, clp
, NFS4_LOCK_STID
);
4038 list_add(&stp
->st_perfile
, &fp
->fi_stateids
);
4039 list_add(&stp
->st_perstateowner
, &lo
->lo_owner
.so_stateids
);
4040 stp
->st_stateowner
= &lo
->lo_owner
;
4043 stp
->st_access_bmap
= 0;
4044 stp
->st_deny_bmap
= open_stp
->st_deny_bmap
;
4045 stp
->st_openstp
= open_stp
;
4050 check_lock_length(u64 offset
, u64 length
)
4052 return ((length
== 0) || ((length
!= NFS4_MAX_UINT64
) &&
4053 LOFF_OVERFLOW(offset
, length
)));
4056 static void get_lock_access(struct nfs4_ol_stateid
*lock_stp
, u32 access
)
4058 struct nfs4_file
*fp
= lock_stp
->st_file
;
4059 int oflag
= nfs4_access_to_omode(access
);
4061 if (test_access(access
, lock_stp
))
4063 nfs4_file_get_access(fp
, oflag
);
4064 set_access(access
, lock_stp
);
4067 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)
4069 struct nfs4_file
*fi
= ost
->st_file
;
4070 struct nfs4_openowner
*oo
= openowner(ost
->st_stateowner
);
4071 struct nfs4_client
*cl
= oo
->oo_owner
.so_client
;
4072 struct nfs4_lockowner
*lo
;
4073 unsigned int strhashval
;
4074 struct nfsd_net
*nn
= net_generic(cl
->net
, nfsd_net_id
);
4076 lo
= find_lockowner_str(fi
->fi_inode
, &cl
->cl_clientid
,
4077 &lock
->v
.new.owner
, nn
);
4079 if (!cstate
->minorversion
)
4080 return nfserr_bad_seqid
;
4081 /* XXX: a lockowner always has exactly one stateid: */
4082 *lst
= list_first_entry(&lo
->lo_owner
.so_stateids
,
4083 struct nfs4_ol_stateid
, st_perstateowner
);
4086 strhashval
= ownerstr_hashval(cl
->cl_clientid
.cl_id
,
4087 &lock
->v
.new.owner
);
4088 lo
= alloc_init_lock_stateowner(strhashval
, cl
, ost
, lock
);
4090 return nfserr_jukebox
;
4091 *lst
= alloc_init_lock_stateid(lo
, fi
, ost
);
4093 release_lockowner(lo
);
4094 return nfserr_jukebox
;
4104 nfsd4_lock(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4105 struct nfsd4_lock
*lock
)
4107 struct nfs4_openowner
*open_sop
= NULL
;
4108 struct nfs4_lockowner
*lock_sop
= NULL
;
4109 struct nfs4_ol_stateid
*lock_stp
;
4110 struct file
*filp
= NULL
;
4111 struct file_lock
*file_lock
= NULL
;
4112 struct file_lock
*conflock
= NULL
;
4114 bool new_state
= false;
4117 struct net
*net
= SVC_NET(rqstp
);
4118 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4120 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4121 (long long) lock
->lk_offset
,
4122 (long long) lock
->lk_length
);
4124 if (check_lock_length(lock
->lk_offset
, lock
->lk_length
))
4125 return nfserr_inval
;
4127 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
,
4128 S_IFREG
, NFSD_MAY_LOCK
))) {
4129 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4135 if (lock
->lk_is_new
) {
4136 struct nfs4_ol_stateid
*open_stp
= NULL
;
4138 if (nfsd4_has_session(cstate
))
4139 /* See rfc 5661 18.10.3: given clientid is ignored: */
4140 memcpy(&lock
->v
.new.clientid
,
4141 &cstate
->session
->se_client
->cl_clientid
,
4142 sizeof(clientid_t
));
4144 status
= nfserr_stale_clientid
;
4145 if (STALE_CLIENTID(&lock
->lk_new_clientid
, nn
))
4148 /* validate and update open stateid and open seqid */
4149 status
= nfs4_preprocess_confirmed_seqid_op(cstate
,
4150 lock
->lk_new_open_seqid
,
4151 &lock
->lk_new_open_stateid
,
4155 open_sop
= openowner(open_stp
->st_stateowner
);
4156 status
= nfserr_bad_stateid
;
4157 if (!same_clid(&open_sop
->oo_owner
.so_client
->cl_clientid
,
4158 &lock
->v
.new.clientid
))
4160 status
= lookup_or_create_lock_state(cstate
, open_stp
, lock
,
4161 &lock_stp
, &new_state
);
4163 status
= nfs4_preprocess_seqid_op(cstate
,
4164 lock
->lk_old_lock_seqid
,
4165 &lock
->lk_old_lock_stateid
,
4166 NFS4_LOCK_STID
, &lock_stp
, nn
);
4169 lock_sop
= lockowner(lock_stp
->st_stateowner
);
4171 lkflg
= setlkflg(lock
->lk_type
);
4172 status
= nfs4_check_openmode(lock_stp
, lkflg
);
4176 status
= nfserr_grace
;
4177 if (locks_in_grace(net
) && !lock
->lk_reclaim
)
4179 status
= nfserr_no_grace
;
4180 if (!locks_in_grace(net
) && lock
->lk_reclaim
)
4183 file_lock
= locks_alloc_lock();
4185 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4186 status
= nfserr_jukebox
;
4190 locks_init_lock(file_lock
);
4191 switch (lock
->lk_type
) {
4194 filp
= find_readable_file(lock_stp
->st_file
);
4196 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_READ
);
4197 file_lock
->fl_type
= F_RDLCK
;
4200 case NFS4_WRITEW_LT
:
4201 filp
= find_writeable_file(lock_stp
->st_file
);
4203 get_lock_access(lock_stp
, NFS4_SHARE_ACCESS_WRITE
);
4204 file_lock
->fl_type
= F_WRLCK
;
4207 status
= nfserr_inval
;
4211 status
= nfserr_openmode
;
4214 file_lock
->fl_owner
= (fl_owner_t
)lock_sop
;
4215 file_lock
->fl_pid
= current
->tgid
;
4216 file_lock
->fl_file
= filp
;
4217 file_lock
->fl_flags
= FL_POSIX
;
4218 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4219 file_lock
->fl_start
= lock
->lk_offset
;
4220 file_lock
->fl_end
= last_byte_offset(lock
->lk_offset
, lock
->lk_length
);
4221 nfs4_transform_lock_offset(file_lock
);
4223 conflock
= locks_alloc_lock();
4225 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4226 status
= nfserr_jukebox
;
4230 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, conflock
);
4232 case 0: /* success! */
4233 update_stateid(&lock_stp
->st_stid
.sc_stateid
);
4234 memcpy(&lock
->lk_resp_stateid
, &lock_stp
->st_stid
.sc_stateid
,
4238 case (EAGAIN
): /* conflock holds conflicting lock */
4239 status
= nfserr_denied
;
4240 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4241 nfs4_set_lock_denied(conflock
, &lock
->lk_denied
);
4244 status
= nfserr_deadlock
;
4247 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err
);
4248 status
= nfserrno(err
);
4252 if (status
&& new_state
)
4253 release_lockowner(lock_sop
);
4254 if (!cstate
->replay_owner
)
4255 nfs4_unlock_state();
4257 locks_free_lock(file_lock
);
4259 locks_free_lock(conflock
);
4264 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4265 * so we do a temporary open here just to get an open file to pass to
4266 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4269 static __be32
nfsd_test_lock(struct svc_rqst
*rqstp
, struct svc_fh
*fhp
, struct file_lock
*lock
)
4272 __be32 err
= nfsd_open(rqstp
, fhp
, S_IFREG
, NFSD_MAY_READ
, &file
);
4274 err
= nfserrno(vfs_test_lock(file
, lock
));
4284 nfsd4_lockt(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4285 struct nfsd4_lockt
*lockt
)
4287 struct inode
*inode
;
4288 struct file_lock
*file_lock
= NULL
;
4289 struct nfs4_lockowner
*lo
;
4291 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4293 if (locks_in_grace(SVC_NET(rqstp
)))
4294 return nfserr_grace
;
4296 if (check_lock_length(lockt
->lt_offset
, lockt
->lt_length
))
4297 return nfserr_inval
;
4301 if (!nfsd4_has_session(cstate
)) {
4302 status
= lookup_clientid(&lockt
->lt_clientid
, false, nn
, NULL
);
4307 if ((status
= fh_verify(rqstp
, &cstate
->current_fh
, S_IFREG
, 0)))
4310 inode
= cstate
->current_fh
.fh_dentry
->d_inode
;
4311 file_lock
= locks_alloc_lock();
4313 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4314 status
= nfserr_jukebox
;
4317 locks_init_lock(file_lock
);
4318 switch (lockt
->lt_type
) {
4321 file_lock
->fl_type
= F_RDLCK
;
4324 case NFS4_WRITEW_LT
:
4325 file_lock
->fl_type
= F_WRLCK
;
4328 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4329 status
= nfserr_inval
;
4333 lo
= find_lockowner_str(inode
, &lockt
->lt_clientid
, &lockt
->lt_owner
, nn
);
4335 file_lock
->fl_owner
= (fl_owner_t
)lo
;
4336 file_lock
->fl_pid
= current
->tgid
;
4337 file_lock
->fl_flags
= FL_POSIX
;
4339 file_lock
->fl_start
= lockt
->lt_offset
;
4340 file_lock
->fl_end
= last_byte_offset(lockt
->lt_offset
, lockt
->lt_length
);
4342 nfs4_transform_lock_offset(file_lock
);
4344 status
= nfsd_test_lock(rqstp
, &cstate
->current_fh
, file_lock
);
4348 if (file_lock
->fl_type
!= F_UNLCK
) {
4349 status
= nfserr_denied
;
4350 nfs4_set_lock_denied(file_lock
, &lockt
->lt_denied
);
4353 nfs4_unlock_state();
4355 locks_free_lock(file_lock
);
4360 nfsd4_locku(struct svc_rqst
*rqstp
, struct nfsd4_compound_state
*cstate
,
4361 struct nfsd4_locku
*locku
)
4363 struct nfs4_ol_stateid
*stp
;
4364 struct file
*filp
= NULL
;
4365 struct file_lock
*file_lock
= NULL
;
4368 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4370 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4371 (long long) locku
->lu_offset
,
4372 (long long) locku
->lu_length
);
4374 if (check_lock_length(locku
->lu_offset
, locku
->lu_length
))
4375 return nfserr_inval
;
4379 status
= nfs4_preprocess_seqid_op(cstate
, locku
->lu_seqid
,
4380 &locku
->lu_stateid
, NFS4_LOCK_STID
,
4384 filp
= find_any_file(stp
->st_file
);
4386 status
= nfserr_lock_range
;
4389 file_lock
= locks_alloc_lock();
4391 dprintk("NFSD: %s: unable to allocate lock!\n", __func__
);
4392 status
= nfserr_jukebox
;
4395 locks_init_lock(file_lock
);
4396 file_lock
->fl_type
= F_UNLCK
;
4397 file_lock
->fl_owner
= (fl_owner_t
)lockowner(stp
->st_stateowner
);
4398 file_lock
->fl_pid
= current
->tgid
;
4399 file_lock
->fl_file
= filp
;
4400 file_lock
->fl_flags
= FL_POSIX
;
4401 file_lock
->fl_lmops
= &nfsd_posix_mng_ops
;
4402 file_lock
->fl_start
= locku
->lu_offset
;
4404 file_lock
->fl_end
= last_byte_offset(locku
->lu_offset
,
4406 nfs4_transform_lock_offset(file_lock
);
4409 * Try to unlock the file in the VFS.
4411 err
= vfs_lock_file(filp
, F_SETLK
, file_lock
, NULL
);
4413 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4417 * OK, unlock succeeded; the only thing left to do is update the stateid.
4419 update_stateid(&stp
->st_stid
.sc_stateid
);
4420 memcpy(&locku
->lu_stateid
, &stp
->st_stid
.sc_stateid
, sizeof(stateid_t
));
4423 if (!cstate
->replay_owner
)
4424 nfs4_unlock_state();
4426 locks_free_lock(file_lock
);
4430 status
= nfserrno(err
);
4436 * 1: locks held by lockowner
4437 * 0: no locks held by lockowner
4440 check_for_locks(struct nfs4_file
*filp
, struct nfs4_lockowner
*lowner
)
4442 struct file_lock
**flpp
;
4443 struct inode
*inode
= filp
->fi_inode
;
4447 for (flpp
= &inode
->i_flock
; *flpp
!= NULL
; flpp
= &(*flpp
)->fl_next
) {
4448 if ((*flpp
)->fl_owner
== (fl_owner_t
)lowner
) {
4459 nfsd4_release_lockowner(struct svc_rqst
*rqstp
,
4460 struct nfsd4_compound_state
*cstate
,
4461 struct nfsd4_release_lockowner
*rlockowner
)
4463 clientid_t
*clid
= &rlockowner
->rl_clientid
;
4464 struct nfs4_stateowner
*sop
;
4465 struct nfs4_lockowner
*lo
;
4466 struct nfs4_ol_stateid
*stp
;
4467 struct xdr_netobj
*owner
= &rlockowner
->rl_owner
;
4468 struct list_head matches
;
4469 unsigned int hashval
= ownerstr_hashval(clid
->cl_id
, owner
);
4471 struct nfsd_net
*nn
= net_generic(SVC_NET(rqstp
), nfsd_net_id
);
4473 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4474 clid
->cl_boot
, clid
->cl_id
);
4478 status
= lookup_clientid(clid
, cstate
->minorversion
, nn
, NULL
);
4482 status
= nfserr_locks_held
;
4483 INIT_LIST_HEAD(&matches
);
4485 list_for_each_entry(sop
, &nn
->ownerstr_hashtbl
[hashval
], so_strhash
) {
4486 if (sop
->so_is_open_owner
)
4488 if (!same_owner_str(sop
, owner
, clid
))
4490 list_for_each_entry(stp
, &sop
->so_stateids
,
4492 lo
= lockowner(sop
);
4493 if (check_for_locks(stp
->st_file
, lo
))
4495 list_add(&lo
->lo_list
, &matches
);
4498 /* Clients probably won't expect us to return with some (but not all)
4499 * of the lockowner state released; so don't release any until all
4500 * have been checked. */
4502 while (!list_empty(&matches
)) {
4503 lo
= list_entry(matches
.next
, struct nfs4_lockowner
,
4505 /* unhash_stateowner deletes so_perclient only
4506 * for openowners. */
4507 list_del(&lo
->lo_list
);
4508 release_lockowner(lo
);
4511 nfs4_unlock_state();
4515 static inline struct nfs4_client_reclaim
*
4518 return kmalloc(sizeof(struct nfs4_client_reclaim
), GFP_KERNEL
);
4522 nfs4_has_reclaimed_state(const char *name
, struct nfsd_net
*nn
)
4524 struct nfs4_client_reclaim
*crp
;
4526 crp
= nfsd4_find_reclaim_client(name
, nn
);
4527 return (crp
&& crp
->cr_clp
);
4531 * failure => all reset bets are off, nfserr_no_grace...
4533 struct nfs4_client_reclaim
*
4534 nfs4_client_to_reclaim(const char *name
, struct nfsd_net
*nn
)
4536 unsigned int strhashval
;
4537 struct nfs4_client_reclaim
*crp
;
4539 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN
, name
);
4540 crp
= alloc_reclaim();
4542 strhashval
= clientstr_hashval(name
);
4543 INIT_LIST_HEAD(&crp
->cr_strhash
);
4544 list_add(&crp
->cr_strhash
, &nn
->reclaim_str_hashtbl
[strhashval
]);
4545 memcpy(crp
->cr_recdir
, name
, HEXDIR_LEN
);
4547 nn
->reclaim_str_hashtbl_size
++;
4553 nfs4_remove_reclaim_record(struct nfs4_client_reclaim
*crp
, struct nfsd_net
*nn
)
4555 list_del(&crp
->cr_strhash
);
4557 nn
->reclaim_str_hashtbl_size
--;
4561 nfs4_release_reclaim(struct nfsd_net
*nn
)
4563 struct nfs4_client_reclaim
*crp
= NULL
;
4566 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4567 while (!list_empty(&nn
->reclaim_str_hashtbl
[i
])) {
4568 crp
= list_entry(nn
->reclaim_str_hashtbl
[i
].next
,
4569 struct nfs4_client_reclaim
, cr_strhash
);
4570 nfs4_remove_reclaim_record(crp
, nn
);
4573 WARN_ON_ONCE(nn
->reclaim_str_hashtbl_size
);
4577 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4578 struct nfs4_client_reclaim
*
4579 nfsd4_find_reclaim_client(const char *recdir
, struct nfsd_net
*nn
)
4581 unsigned int strhashval
;
4582 struct nfs4_client_reclaim
*crp
= NULL
;
4584 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir
);
4586 strhashval
= clientstr_hashval(recdir
);
4587 list_for_each_entry(crp
, &nn
->reclaim_str_hashtbl
[strhashval
], cr_strhash
) {
4588 if (same_name(crp
->cr_recdir
, recdir
)) {
4596 * Called from OPEN. Look for clientid in reclaim list.
4599 nfs4_check_open_reclaim(clientid_t
*clid
, bool sessions
, struct nfsd_net
*nn
)
4601 struct nfs4_client
*clp
;
4603 /* find clientid in conf_id_hashtbl */
4604 clp
= find_confirmed_client(clid
, sessions
, nn
);
4606 return nfserr_reclaim_bad
;
4608 return nfsd4_client_record_check(clp
) ? nfserr_reclaim_bad
: nfs_ok
;
4611 #ifdef CONFIG_NFSD_FAULT_INJECTION
4613 u64
nfsd_forget_client(struct nfs4_client
*clp
, u64 max
)
4619 u64
nfsd_print_client(struct nfs4_client
*clp
, u64 num
)
4621 char buf
[INET6_ADDRSTRLEN
];
4622 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, 129);
4623 printk(KERN_INFO
"NFS Client: %s\n", buf
);
4627 static void nfsd_print_count(struct nfs4_client
*clp
, unsigned int count
,
4630 char buf
[INET6_ADDRSTRLEN
];
4631 rpc_ntop((struct sockaddr
*)&clp
->cl_addr
, buf
, 129);
4632 printk(KERN_INFO
"NFS Client: %s has %u %s\n", buf
, count
, type
);
4635 static u64
nfsd_foreach_client_lock(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_lockowner
*))
4637 struct nfs4_openowner
*oop
;
4638 struct nfs4_lockowner
*lop
, *lo_next
;
4639 struct nfs4_ol_stateid
*stp
, *st_next
;
4642 list_for_each_entry(oop
, &clp
->cl_openowners
, oo_perclient
) {
4643 list_for_each_entry_safe(stp
, st_next
, &oop
->oo_owner
.so_stateids
, st_perstateowner
) {
4644 list_for_each_entry_safe(lop
, lo_next
, &stp
->st_lockowners
, lo_perstateid
) {
4656 u64
nfsd_forget_client_locks(struct nfs4_client
*clp
, u64 max
)
4658 return nfsd_foreach_client_lock(clp
, max
, release_lockowner
);
4661 u64
nfsd_print_client_locks(struct nfs4_client
*clp
, u64 max
)
4663 u64 count
= nfsd_foreach_client_lock(clp
, max
, NULL
);
4664 nfsd_print_count(clp
, count
, "locked files");
4668 static u64
nfsd_foreach_client_open(struct nfs4_client
*clp
, u64 max
, void (*func
)(struct nfs4_openowner
*))
4670 struct nfs4_openowner
*oop
, *next
;
4673 list_for_each_entry_safe(oop
, next
, &clp
->cl_openowners
, oo_perclient
) {
4683 u64
nfsd_forget_client_openowners(struct nfs4_client
*clp
, u64 max
)
4685 return nfsd_foreach_client_open(clp
, max
, release_openowner
);
4688 u64
nfsd_print_client_openowners(struct nfs4_client
*clp
, u64 max
)
4690 u64 count
= nfsd_foreach_client_open(clp
, max
, NULL
);
4691 nfsd_print_count(clp
, count
, "open files");
4695 static u64
nfsd_find_all_delegations(struct nfs4_client
*clp
, u64 max
,
4696 struct list_head
*victims
)
4698 struct nfs4_delegation
*dp
, *next
;
4701 list_for_each_entry_safe(dp
, next
, &clp
->cl_delegations
, dl_perclnt
) {
4703 list_move(&dp
->dl_recall_lru
, victims
);
4710 u64
nfsd_forget_client_delegations(struct nfs4_client
*clp
, u64 max
)
4712 struct nfs4_delegation
*dp
, *next
;
4716 spin_lock(&recall_lock
);
4717 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4718 spin_unlock(&recall_lock
);
4720 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4721 unhash_delegation(dp
);
4726 u64
nfsd_recall_client_delegations(struct nfs4_client
*clp
, u64 max
)
4728 struct nfs4_delegation
*dp
, *next
;
4732 spin_lock(&recall_lock
);
4733 count
= nfsd_find_all_delegations(clp
, max
, &victims
);
4734 list_for_each_entry_safe(dp
, next
, &victims
, dl_recall_lru
)
4735 nfsd_break_one_deleg(dp
);
4736 spin_unlock(&recall_lock
);
4741 u64
nfsd_print_client_delegations(struct nfs4_client
*clp
, u64 max
)
4745 spin_lock(&recall_lock
);
4746 count
= nfsd_find_all_delegations(clp
, max
, NULL
);
4747 spin_unlock(&recall_lock
);
4749 nfsd_print_count(clp
, count
, "delegations");
4753 u64
nfsd_for_n_state(u64 max
, u64 (*func
)(struct nfs4_client
*, u64
))
4755 struct nfs4_client
*clp
, *next
;
4757 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4759 if (!nfsd_netns_ready(nn
))
4762 list_for_each_entry_safe(clp
, next
, &nn
->client_lru
, cl_lru
) {
4763 count
+= func(clp
, max
- count
);
4764 if ((max
!= 0) && (count
>= max
))
4771 struct nfs4_client
*nfsd_find_client(struct sockaddr_storage
*addr
, size_t addr_size
)
4773 struct nfs4_client
*clp
;
4774 struct nfsd_net
*nn
= net_generic(current
->nsproxy
->net_ns
, nfsd_net_id
);
4776 if (!nfsd_netns_ready(nn
))
4779 list_for_each_entry(clp
, &nn
->client_lru
, cl_lru
) {
4780 if (memcmp(&clp
->cl_addr
, addr
, addr_size
) == 0)
4786 #endif /* CONFIG_NFSD_FAULT_INJECTION */
4788 /* initialization to perform at module load time: */
4791 nfs4_state_init(void)
4795 for (i
= 0; i
< FILE_HASH_SIZE
; i
++) {
4796 INIT_LIST_HEAD(&file_hashtbl
[i
]);
4798 INIT_LIST_HEAD(&del_recall_lru
);
4802 * Since the lifetime of a delegation isn't limited to that of an open, a
4803 * client may quite reasonably hang on to a delegation as long as it has
4804 * the inode cached. This becomes an obvious problem the first time a
4805 * client's inode cache approaches the size of the server's total memory.
4807 * For now we avoid this problem by imposing a hard limit on the number
4808 * of delegations, which varies according to the server's memory size.
4811 set_max_delegations(void)
4814 * Allow at most 4 delegations per megabyte of RAM. Quick
4815 * estimates suggest that in the worst case (where every delegation
4816 * is for a different inode), a delegation could take about 1.5K,
4817 * giving a worst case usage of about 6% of memory.
4819 max_delegations
= nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT
);
4822 static int nfs4_state_create_net(struct net
*net
)
4824 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4827 nn
->conf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4828 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4829 if (!nn
->conf_id_hashtbl
)
4831 nn
->unconf_id_hashtbl
= kmalloc(sizeof(struct list_head
) *
4832 CLIENT_HASH_SIZE
, GFP_KERNEL
);
4833 if (!nn
->unconf_id_hashtbl
)
4835 nn
->ownerstr_hashtbl
= kmalloc(sizeof(struct list_head
) *
4836 OWNER_HASH_SIZE
, GFP_KERNEL
);
4837 if (!nn
->ownerstr_hashtbl
)
4839 nn
->lockowner_ino_hashtbl
= kmalloc(sizeof(struct list_head
) *
4840 LOCKOWNER_INO_HASH_SIZE
, GFP_KERNEL
);
4841 if (!nn
->lockowner_ino_hashtbl
)
4842 goto err_lockowner_ino
;
4843 nn
->sessionid_hashtbl
= kmalloc(sizeof(struct list_head
) *
4844 SESSION_HASH_SIZE
, GFP_KERNEL
);
4845 if (!nn
->sessionid_hashtbl
)
4848 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4849 INIT_LIST_HEAD(&nn
->conf_id_hashtbl
[i
]);
4850 INIT_LIST_HEAD(&nn
->unconf_id_hashtbl
[i
]);
4852 for (i
= 0; i
< OWNER_HASH_SIZE
; i
++)
4853 INIT_LIST_HEAD(&nn
->ownerstr_hashtbl
[i
]);
4854 for (i
= 0; i
< LOCKOWNER_INO_HASH_SIZE
; i
++)
4855 INIT_LIST_HEAD(&nn
->lockowner_ino_hashtbl
[i
]);
4856 for (i
= 0; i
< SESSION_HASH_SIZE
; i
++)
4857 INIT_LIST_HEAD(&nn
->sessionid_hashtbl
[i
]);
4858 nn
->conf_name_tree
= RB_ROOT
;
4859 nn
->unconf_name_tree
= RB_ROOT
;
4860 INIT_LIST_HEAD(&nn
->client_lru
);
4861 INIT_LIST_HEAD(&nn
->close_lru
);
4862 spin_lock_init(&nn
->client_lock
);
4864 INIT_DELAYED_WORK(&nn
->laundromat_work
, laundromat_main
);
4870 kfree(nn
->lockowner_ino_hashtbl
);
4872 kfree(nn
->ownerstr_hashtbl
);
4874 kfree(nn
->unconf_id_hashtbl
);
4876 kfree(nn
->conf_id_hashtbl
);
4882 nfs4_state_destroy_net(struct net
*net
)
4885 struct nfs4_client
*clp
= NULL
;
4886 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4887 struct rb_node
*node
, *tmp
;
4889 for (i
= 0; i
< CLIENT_HASH_SIZE
; i
++) {
4890 while (!list_empty(&nn
->conf_id_hashtbl
[i
])) {
4891 clp
= list_entry(nn
->conf_id_hashtbl
[i
].next
, struct nfs4_client
, cl_idhash
);
4892 destroy_client(clp
);
4896 node
= rb_first(&nn
->unconf_name_tree
);
4897 while (node
!= NULL
) {
4899 node
= rb_next(tmp
);
4900 clp
= rb_entry(tmp
, struct nfs4_client
, cl_namenode
);
4901 rb_erase(tmp
, &nn
->unconf_name_tree
);
4902 destroy_client(clp
);
4905 kfree(nn
->sessionid_hashtbl
);
4906 kfree(nn
->lockowner_ino_hashtbl
);
4907 kfree(nn
->ownerstr_hashtbl
);
4908 kfree(nn
->unconf_id_hashtbl
);
4909 kfree(nn
->conf_id_hashtbl
);
4914 nfs4_state_start_net(struct net
*net
)
4916 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4920 * FIXME: For now, we hang most of the pernet global stuff off of
4921 * init_net until nfsd is fully containerized. Eventually, we'll
4922 * need to pass a net pointer into this function, take a reference
4923 * to that instead and then do most of the rest of this on a per-net
4926 if (net
!= &init_net
)
4929 ret
= nfs4_state_create_net(net
);
4932 nfsd4_client_tracking_init(net
);
4933 nn
->boot_time
= get_seconds();
4934 locks_start_grace(net
, &nn
->nfsd4_manager
);
4935 nn
->grace_ended
= false;
4936 printk(KERN_INFO
"NFSD: starting %ld-second grace period (net %p)\n",
4937 nn
->nfsd4_grace
, net
);
4938 queue_delayed_work(laundry_wq
, &nn
->laundromat_work
, nn
->nfsd4_grace
* HZ
);
4942 /* initialization to perform when the nfsd service is started: */
4945 nfs4_state_start(void)
4949 ret
= set_callback_cred();
4952 laundry_wq
= create_singlethread_workqueue("nfsd4");
4953 if (laundry_wq
== NULL
) {
4957 ret
= nfsd4_create_callback_queue();
4959 goto out_free_laundry
;
4961 set_max_delegations();
4966 destroy_workqueue(laundry_wq
);
4971 /* should be called with the state lock held */
4973 nfs4_state_shutdown_net(struct net
*net
)
4975 struct nfs4_delegation
*dp
= NULL
;
4976 struct list_head
*pos
, *next
, reaplist
;
4977 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
4979 cancel_delayed_work_sync(&nn
->laundromat_work
);
4980 locks_end_grace(&nn
->nfsd4_manager
);
4982 INIT_LIST_HEAD(&reaplist
);
4983 spin_lock(&recall_lock
);
4984 list_for_each_safe(pos
, next
, &del_recall_lru
) {
4985 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4986 if (dp
->dl_stid
.sc_client
->net
!= net
)
4988 list_move(&dp
->dl_recall_lru
, &reaplist
);
4990 spin_unlock(&recall_lock
);
4991 list_for_each_safe(pos
, next
, &reaplist
) {
4992 dp
= list_entry (pos
, struct nfs4_delegation
, dl_recall_lru
);
4993 unhash_delegation(dp
);
4996 nfsd4_client_tracking_exit(net
);
4997 nfs4_state_destroy_net(net
);
5001 nfs4_state_shutdown(void)
5003 destroy_workqueue(laundry_wq
);
5004 nfsd4_destroy_callback_queue();
5008 get_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5010 if (HAS_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
) && CURRENT_STATEID(stateid
))
5011 memcpy(stateid
, &cstate
->current_stateid
, sizeof(stateid_t
));
5015 put_stateid(struct nfsd4_compound_state
*cstate
, stateid_t
*stateid
)
5017 if (cstate
->minorversion
) {
5018 memcpy(&cstate
->current_stateid
, stateid
, sizeof(stateid_t
));
5019 SET_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5024 clear_current_stateid(struct nfsd4_compound_state
*cstate
)
5026 CLEAR_STATE_ID(cstate
, CURRENT_STATE_ID_FLAG
);
5030 * functions to set current state id
5033 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5035 put_stateid(cstate
, &odp
->od_stateid
);
5039 nfsd4_set_openstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open
*open
)
5041 put_stateid(cstate
, &open
->op_stateid
);
5045 nfsd4_set_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5047 put_stateid(cstate
, &close
->cl_stateid
);
5051 nfsd4_set_lockstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_lock
*lock
)
5053 put_stateid(cstate
, &lock
->lk_resp_stateid
);
5057 * functions to consume current state id
5061 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_open_downgrade
*odp
)
5063 get_stateid(cstate
, &odp
->od_stateid
);
5067 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_delegreturn
*drp
)
5069 get_stateid(cstate
, &drp
->dr_stateid
);
5073 nfsd4_get_freestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_free_stateid
*fsp
)
5075 get_stateid(cstate
, &fsp
->fr_stateid
);
5079 nfsd4_get_setattrstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_setattr
*setattr
)
5081 get_stateid(cstate
, &setattr
->sa_stateid
);
5085 nfsd4_get_closestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_close
*close
)
5087 get_stateid(cstate
, &close
->cl_stateid
);
5091 nfsd4_get_lockustateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_locku
*locku
)
5093 get_stateid(cstate
, &locku
->lu_stateid
);
5097 nfsd4_get_readstateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_read
*read
)
5099 get_stateid(cstate
, &read
->rd_stateid
);
5103 nfsd4_get_writestateid(struct nfsd4_compound_state
*cstate
, struct nfsd4_write
*write
)
5105 get_stateid(cstate
, &write
->wr_stateid
);