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/addr.h>
44 #include <linux/hash.h>
48 #include "current_stateid.h"
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
54 #define all_ones {{~0,~0},~0}
55 static const stateid_t one_stateid = {
57 .si_opaque = all_ones,
59 static const stateid_t zero_stateid = {
62 static const stateid_t currentstateid = {
66 static u64 current_sessionid = 1;
68 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
69 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
70 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
72 /* forward declarations */
73 static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner);
77 /* Currently used for almost all code touching nfsv4 state: */
78 static DEFINE_MUTEX(client_mutex);
81 * Currently used for the del_recall_lru and file hash table. In an
82 * effort to decrease the scope of the client_mutex, this spinlock may
83 * eventually cover more:
85 static DEFINE_SPINLOCK(state_lock);
87 static struct kmem_cache *openowner_slab;
88 static struct kmem_cache *lockowner_slab;
89 static struct kmem_cache *file_slab;
90 static struct kmem_cache *stateid_slab;
91 static struct kmem_cache *deleg_slab;
96 mutex_lock(&client_mutex);
99 static void free_session(struct nfsd4_session *);
101 static bool is_session_dead(struct nfsd4_session *ses)
103 return ses->se_flags & NFS4_SESSION_DEAD;
106 static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
108 if (atomic_read(&ses->se_ref) > ref_held_by_me)
109 return nfserr_jukebox;
110 ses->se_flags |= NFS4_SESSION_DEAD;
115 nfs4_unlock_state(void)
117 mutex_unlock(&client_mutex);
120 static bool is_client_expired(struct nfs4_client *clp)
122 return clp->cl_time == 0;
125 static __be32 mark_client_expired_locked(struct nfs4_client *clp)
127 if (atomic_read(&clp->cl_refcount))
128 return nfserr_jukebox;
133 static __be32 mark_client_expired(struct nfs4_client *clp)
135 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
138 spin_lock(&nn->client_lock);
139 ret = mark_client_expired_locked(clp);
140 spin_unlock(&nn->client_lock);
144 static __be32 get_client_locked(struct nfs4_client *clp)
146 if (is_client_expired(clp))
147 return nfserr_expired;
148 atomic_inc(&clp->cl_refcount);
152 /* must be called under the client_lock */
154 renew_client_locked(struct nfs4_client *clp)
156 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
158 if (is_client_expired(clp)) {
160 printk("%s: client (clientid %08x/%08x) already expired\n",
162 clp->cl_clientid.cl_boot,
163 clp->cl_clientid.cl_id);
167 dprintk("renewing client (clientid %08x/%08x)\n",
168 clp->cl_clientid.cl_boot,
169 clp->cl_clientid.cl_id);
170 list_move_tail(&clp->cl_lru, &nn->client_lru);
171 clp->cl_time = get_seconds();
175 renew_client(struct nfs4_client *clp)
177 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
179 spin_lock(&nn->client_lock);
180 renew_client_locked(clp);
181 spin_unlock(&nn->client_lock);
184 static void put_client_renew_locked(struct nfs4_client *clp)
186 if (!atomic_dec_and_test(&clp->cl_refcount))
188 if (!is_client_expired(clp))
189 renew_client_locked(clp);
192 static void put_client_renew(struct nfs4_client *clp)
194 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
196 spin_lock(&nn->client_lock);
197 put_client_renew_locked(clp);
198 spin_unlock(&nn->client_lock);
201 static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
205 if (is_session_dead(ses))
206 return nfserr_badsession;
207 status = get_client_locked(ses->se_client);
210 atomic_inc(&ses->se_ref);
214 static void nfsd4_put_session_locked(struct nfsd4_session *ses)
216 struct nfs4_client *clp = ses->se_client;
218 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
220 put_client_renew_locked(clp);
223 static void nfsd4_put_session(struct nfsd4_session *ses)
225 struct nfs4_client *clp = ses->se_client;
226 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
228 spin_lock(&nn->client_lock);
229 nfsd4_put_session_locked(ses);
230 spin_unlock(&nn->client_lock);
235 opaque_hashval(const void *ptr, int nbytes)
237 unsigned char *cptr = (unsigned char *) ptr;
247 static void nfsd4_free_file(struct nfs4_file *f)
249 kmem_cache_free(file_slab, f);
253 put_nfs4_file(struct nfs4_file *fi)
255 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
256 hlist_del(&fi->fi_hash);
257 spin_unlock(&state_lock);
264 get_nfs4_file(struct nfs4_file *fi)
266 atomic_inc(&fi->fi_ref);
269 static int num_delegations;
270 unsigned long max_delegations;
273 * Open owner state (share locks)
276 /* hash tables for lock and open owners */
277 #define OWNER_HASH_BITS 8
278 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
279 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
281 static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)
285 ret = opaque_hashval(ownername->data, ownername->len);
287 return ret & OWNER_HASH_MASK;
290 /* hash table for nfs4_file */
291 #define FILE_HASH_BITS 8
292 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
294 static unsigned int file_hashval(struct inode *ino)
296 /* XXX: why are we hashing on inode pointer, anyway? */
297 return hash_ptr(ino, FILE_HASH_BITS);
300 static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
302 static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag)
304 WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR]));
305 atomic_inc(&fp->fi_access[oflag]);
308 static void nfs4_file_get_access(struct nfs4_file *fp, int oflag)
310 if (oflag == O_RDWR) {
311 __nfs4_file_get_access(fp, O_RDONLY);
312 __nfs4_file_get_access(fp, O_WRONLY);
314 __nfs4_file_get_access(fp, oflag);
317 static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag)
319 if (fp->fi_fds[oflag]) {
320 fput(fp->fi_fds[oflag]);
321 fp->fi_fds[oflag] = NULL;
325 static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
327 if (atomic_dec_and_test(&fp->fi_access[oflag])) {
328 nfs4_file_put_fd(fp, oflag);
329 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
330 nfs4_file_put_fd(fp, O_RDWR);
334 static void nfs4_file_put_access(struct nfs4_file *fp, int oflag)
336 if (oflag == O_RDWR) {
337 __nfs4_file_put_access(fp, O_RDONLY);
338 __nfs4_file_put_access(fp, O_WRONLY);
340 __nfs4_file_put_access(fp, oflag);
343 static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct
346 struct idr *stateids = &cl->cl_stateids;
347 struct nfs4_stid *stid;
350 stid = kmem_cache_alloc(slab, GFP_KERNEL);
354 new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL);
357 stid->sc_client = cl;
359 stid->sc_stateid.si_opaque.so_id = new_id;
360 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
361 /* Will be incremented before return to client: */
362 stid->sc_stateid.si_generation = 0;
365 * It shouldn't be a problem to reuse an opaque stateid value.
366 * I don't think it is for 4.1. But with 4.0 I worry that, for
367 * example, a stray write retransmission could be accepted by
368 * the server when it should have been rejected. Therefore,
369 * adopt a trick from the sctp code to attempt to maximize the
370 * amount of time until an id is reused, by ensuring they always
371 * "increase" (mod INT_MAX):
375 kmem_cache_free(slab, stid);
379 static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp)
381 return openlockstateid(nfs4_alloc_stid(clp, stateid_slab));
385 * When we recall a delegation, we should be careful not to hand it
386 * out again straight away.
387 * To ensure this we keep a pair of bloom filters ('new' and 'old')
388 * in which the filehandles of recalled delegations are "stored".
389 * If a filehandle appear in either filter, a delegation is blocked.
390 * When a delegation is recalled, the filehandle is stored in the "new"
392 * Every 30 seconds we swap the filters and clear the "new" one,
393 * unless both are empty of course.
395 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
396 * low 3 bytes as hash-table indices.
398 * 'state_lock', which is always held when block_delegations() is called,
399 * is used to manage concurrent access. Testing does not need the lock
400 * except when swapping the two filters.
402 static struct bloom_pair {
403 int entries, old_entries;
405 int new; /* index into 'set' */
406 DECLARE_BITMAP(set[2], 256);
407 } blocked_delegations;
409 static int delegation_blocked(struct knfsd_fh *fh)
412 struct bloom_pair *bd = &blocked_delegations;
414 if (bd->entries == 0)
416 if (seconds_since_boot() - bd->swap_time > 30) {
417 spin_lock(&state_lock);
418 if (seconds_since_boot() - bd->swap_time > 30) {
419 bd->entries -= bd->old_entries;
420 bd->old_entries = bd->entries;
421 memset(bd->set[bd->new], 0,
424 bd->swap_time = seconds_since_boot();
426 spin_unlock(&state_lock);
428 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
429 if (test_bit(hash&255, bd->set[0]) &&
430 test_bit((hash>>8)&255, bd->set[0]) &&
431 test_bit((hash>>16)&255, bd->set[0]))
434 if (test_bit(hash&255, bd->set[1]) &&
435 test_bit((hash>>8)&255, bd->set[1]) &&
436 test_bit((hash>>16)&255, bd->set[1]))
442 static void block_delegations(struct knfsd_fh *fh)
445 struct bloom_pair *bd = &blocked_delegations;
447 hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0);
449 __set_bit(hash&255, bd->set[bd->new]);
450 __set_bit((hash>>8)&255, bd->set[bd->new]);
451 __set_bit((hash>>16)&255, bd->set[bd->new]);
452 if (bd->entries == 0)
453 bd->swap_time = seconds_since_boot();
457 static struct nfs4_delegation *
458 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh)
460 struct nfs4_delegation *dp;
462 dprintk("NFSD alloc_init_deleg\n");
463 if (num_delegations > max_delegations)
465 if (delegation_blocked(¤t_fh->fh_handle))
467 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
471 * delegation seqid's are never incremented. The 4.1 special
472 * meaning of seqid 0 isn't meaningful, really, but let's avoid
473 * 0 anyway just for consistency and use 1:
475 dp->dl_stid.sc_stateid.si_generation = 1;
477 INIT_LIST_HEAD(&dp->dl_perfile);
478 INIT_LIST_HEAD(&dp->dl_perclnt);
479 INIT_LIST_HEAD(&dp->dl_recall_lru);
481 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
482 fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle);
484 atomic_set(&dp->dl_count, 1);
485 nfsd4_init_callback(&dp->dl_recall);
489 static void remove_stid(struct nfs4_stid *s)
491 struct idr *stateids = &s->sc_client->cl_stateids;
493 idr_remove(stateids, s->sc_stateid.si_opaque.so_id);
496 static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s)
498 kmem_cache_free(slab, s);
502 nfs4_put_delegation(struct nfs4_delegation *dp)
504 if (atomic_dec_and_test(&dp->dl_count)) {
505 nfs4_free_stid(deleg_slab, &dp->dl_stid);
510 static void nfs4_put_deleg_lease(struct nfs4_file *fp)
514 if (atomic_dec_and_test(&fp->fi_delegees)) {
515 vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
517 fput(fp->fi_deleg_file);
518 fp->fi_deleg_file = NULL;
522 static void unhash_stid(struct nfs4_stid *s)
528 hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
530 lockdep_assert_held(&state_lock);
532 dp->dl_stid.sc_type = NFS4_DELEG_STID;
533 list_add(&dp->dl_perfile, &fp->fi_delegations);
534 list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations);
537 /* Called under the state lock. */
539 unhash_delegation(struct nfs4_delegation *dp)
541 spin_lock(&state_lock);
542 list_del_init(&dp->dl_perclnt);
543 list_del_init(&dp->dl_perfile);
544 list_del_init(&dp->dl_recall_lru);
545 spin_unlock(&state_lock);
547 nfs4_put_deleg_lease(dp->dl_file);
548 put_nfs4_file(dp->dl_file);
555 static void destroy_revoked_delegation(struct nfs4_delegation *dp)
557 list_del_init(&dp->dl_recall_lru);
558 remove_stid(&dp->dl_stid);
559 nfs4_put_delegation(dp);
562 static void destroy_delegation(struct nfs4_delegation *dp)
564 unhash_delegation(dp);
565 remove_stid(&dp->dl_stid);
566 nfs4_put_delegation(dp);
569 static void revoke_delegation(struct nfs4_delegation *dp)
571 struct nfs4_client *clp = dp->dl_stid.sc_client;
573 if (clp->cl_minorversion == 0)
574 destroy_delegation(dp);
576 unhash_delegation(dp);
577 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
578 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
586 static unsigned int clientid_hashval(u32 id)
588 return id & CLIENT_HASH_MASK;
591 static unsigned int clientstr_hashval(const char *name)
593 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
597 * We store the NONE, READ, WRITE, and BOTH bits separately in the
598 * st_{access,deny}_bmap field of the stateid, in order to track not
599 * only what share bits are currently in force, but also what
600 * combinations of share bits previous opens have used. This allows us
601 * to enforce the recommendation of rfc 3530 14.2.19 that the server
602 * return an error if the client attempt to downgrade to a combination
603 * of share bits not explicable by closing some of its previous opens.
605 * XXX: This enforcement is actually incomplete, since we don't keep
606 * track of access/deny bit combinations; so, e.g., we allow:
608 * OPEN allow read, deny write
609 * OPEN allow both, deny none
610 * DOWNGRADE allow read, deny none
612 * which we should reject.
615 bmap_to_share_mode(unsigned long bmap) {
617 unsigned int access = 0;
619 for (i = 1; i < 4; i++) {
620 if (test_bit(i, &bmap))
627 test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
628 unsigned int access, deny;
630 access = bmap_to_share_mode(stp->st_access_bmap);
631 deny = bmap_to_share_mode(stp->st_deny_bmap);
632 if ((access & open->op_share_deny) || (deny & open->op_share_access))
637 /* set share access for a given stateid */
639 set_access(u32 access, struct nfs4_ol_stateid *stp)
641 __set_bit(access, &stp->st_access_bmap);
644 /* clear share access for a given stateid */
646 clear_access(u32 access, struct nfs4_ol_stateid *stp)
648 __clear_bit(access, &stp->st_access_bmap);
651 /* test whether a given stateid has access */
653 test_access(u32 access, struct nfs4_ol_stateid *stp)
655 return test_bit(access, &stp->st_access_bmap);
658 /* set share deny for a given stateid */
660 set_deny(u32 access, struct nfs4_ol_stateid *stp)
662 __set_bit(access, &stp->st_deny_bmap);
665 /* clear share deny for a given stateid */
667 clear_deny(u32 access, struct nfs4_ol_stateid *stp)
669 __clear_bit(access, &stp->st_deny_bmap);
672 /* test whether a given stateid is denying specific access */
674 test_deny(u32 access, struct nfs4_ol_stateid *stp)
676 return test_bit(access, &stp->st_deny_bmap);
679 static int nfs4_access_to_omode(u32 access)
681 switch (access & NFS4_SHARE_ACCESS_BOTH) {
682 case NFS4_SHARE_ACCESS_READ:
684 case NFS4_SHARE_ACCESS_WRITE:
686 case NFS4_SHARE_ACCESS_BOTH:
693 /* release all access and file references for a given stateid */
695 release_all_access(struct nfs4_ol_stateid *stp)
699 for (i = 1; i < 4; i++) {
700 if (test_access(i, stp))
701 nfs4_file_put_access(stp->st_file,
702 nfs4_access_to_omode(i));
703 clear_access(i, stp);
707 static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
709 list_del(&stp->st_perfile);
710 list_del(&stp->st_perstateowner);
713 static void close_generic_stateid(struct nfs4_ol_stateid *stp)
715 release_all_access(stp);
716 put_nfs4_file(stp->st_file);
720 static void free_generic_stateid(struct nfs4_ol_stateid *stp)
722 remove_stid(&stp->st_stid);
723 nfs4_free_stid(stateid_slab, &stp->st_stid);
726 static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
730 list_del(&stp->st_locks);
731 unhash_generic_stateid(stp);
732 unhash_stid(&stp->st_stid);
733 file = find_any_file(stp->st_file);
735 locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner));
736 close_generic_stateid(stp);
737 free_generic_stateid(stp);
740 static void unhash_lockowner(struct nfs4_lockowner *lo)
742 struct nfs4_ol_stateid *stp;
744 list_del(&lo->lo_owner.so_strhash);
745 while (!list_empty(&lo->lo_owner.so_stateids)) {
746 stp = list_first_entry(&lo->lo_owner.so_stateids,
747 struct nfs4_ol_stateid, st_perstateowner);
748 __release_lock_stateid(stp);
752 static void nfs4_free_lockowner(struct nfs4_lockowner *lo)
754 kfree(lo->lo_owner.so_owner.data);
755 kmem_cache_free(lockowner_slab, lo);
758 static void release_lockowner(struct nfs4_lockowner *lo)
760 unhash_lockowner(lo);
761 nfs4_free_lockowner(lo);
764 static void release_lockowner_if_empty(struct nfs4_lockowner *lo)
766 if (list_empty(&lo->lo_owner.so_stateids))
767 release_lockowner(lo);
770 static void release_lock_stateid(struct nfs4_ol_stateid *stp)
772 struct nfs4_lockowner *lo;
774 lo = lockowner(stp->st_stateowner);
775 __release_lock_stateid(stp);
776 release_lockowner_if_empty(lo);
779 static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp)
781 struct nfs4_ol_stateid *stp;
783 while (!list_empty(&open_stp->st_locks)) {
784 stp = list_entry(open_stp->st_locks.next,
785 struct nfs4_ol_stateid, st_locks);
786 release_lock_stateid(stp);
790 static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
792 unhash_generic_stateid(stp);
793 release_open_stateid_locks(stp);
794 close_generic_stateid(stp);
797 static void release_open_stateid(struct nfs4_ol_stateid *stp)
799 unhash_open_stateid(stp);
800 free_generic_stateid(stp);
803 static void unhash_openowner(struct nfs4_openowner *oo)
805 struct nfs4_ol_stateid *stp;
807 list_del(&oo->oo_owner.so_strhash);
808 list_del(&oo->oo_perclient);
809 while (!list_empty(&oo->oo_owner.so_stateids)) {
810 stp = list_first_entry(&oo->oo_owner.so_stateids,
811 struct nfs4_ol_stateid, st_perstateowner);
812 release_open_stateid(stp);
816 static void release_last_closed_stateid(struct nfs4_openowner *oo)
818 struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
821 free_generic_stateid(s);
822 oo->oo_last_closed_stid = NULL;
826 static void nfs4_free_openowner(struct nfs4_openowner *oo)
828 kfree(oo->oo_owner.so_owner.data);
829 kmem_cache_free(openowner_slab, oo);
832 static void release_openowner(struct nfs4_openowner *oo)
834 unhash_openowner(oo);
835 list_del(&oo->oo_close_lru);
836 release_last_closed_stateid(oo);
837 nfs4_free_openowner(oo);
841 hash_sessionid(struct nfs4_sessionid *sessionid)
843 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
845 return sid->sequence % SESSION_HASH_SIZE;
850 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
852 u32 *ptr = (u32 *)(&sessionid->data[0]);
853 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
857 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
863 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
864 * won't be used for replay.
866 void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
868 struct nfs4_stateowner *so = cstate->replay_owner;
870 if (nfserr == nfserr_replay_me)
873 if (!seqid_mutating_err(ntohl(nfserr))) {
874 cstate->replay_owner = NULL;
879 if (so->so_is_open_owner)
880 release_last_closed_stateid(openowner(so));
886 gen_sessionid(struct nfsd4_session *ses)
888 struct nfs4_client *clp = ses->se_client;
889 struct nfsd4_sessionid *sid;
891 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
892 sid->clientid = clp->cl_clientid;
893 sid->sequence = current_sessionid++;
898 * The protocol defines ca_maxresponssize_cached to include the size of
899 * the rpc header, but all we need to cache is the data starting after
900 * the end of the initial SEQUENCE operation--the rest we regenerate
901 * each time. Therefore we can advertise a ca_maxresponssize_cached
902 * value that is the number of bytes in our cache plus a few additional
903 * bytes. In order to stay on the safe side, and not promise more than
904 * we can cache, those additional bytes must be the minimum possible: 24
905 * bytes of rpc header (xid through accept state, with AUTH_NULL
906 * verifier), 12 for the compound header (with zero-length tag), and 44
907 * for the SEQUENCE op response:
909 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
912 free_session_slots(struct nfsd4_session *ses)
916 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
917 kfree(ses->se_slots[i]);
921 * We don't actually need to cache the rpc and session headers, so we
922 * can allocate a little less for each slot:
924 static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
928 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
931 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
932 return size + sizeof(struct nfsd4_slot);
936 * XXX: If we run out of reserved DRC memory we could (up to a point)
937 * re-negotiate active sessions and reduce their slot usage to make
938 * room for new connections. For now we just fail the create session.
940 static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
942 u32 slotsize = slot_bytes(ca);
943 u32 num = ca->maxreqs;
946 spin_lock(&nfsd_drc_lock);
947 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
948 nfsd_drc_max_mem - nfsd_drc_mem_used);
949 num = min_t(int, num, avail / slotsize);
950 nfsd_drc_mem_used += num * slotsize;
951 spin_unlock(&nfsd_drc_lock);
956 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
958 int slotsize = slot_bytes(ca);
960 spin_lock(&nfsd_drc_lock);
961 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
962 spin_unlock(&nfsd_drc_lock);
965 static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
966 struct nfsd4_channel_attrs *battrs)
968 int numslots = fattrs->maxreqs;
969 int slotsize = slot_bytes(fattrs);
970 struct nfsd4_session *new;
973 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
974 + sizeof(struct nfsd4_session) > PAGE_SIZE);
975 mem = numslots * sizeof(struct nfsd4_slot *);
977 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
980 /* allocate each struct nfsd4_slot and data cache in one piece */
981 for (i = 0; i < numslots; i++) {
982 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
983 if (!new->se_slots[i])
987 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
988 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
993 kfree(new->se_slots[i]);
998 static void free_conn(struct nfsd4_conn *c)
1000 svc_xprt_put(c->cn_xprt);
1004 static void nfsd4_conn_lost(struct svc_xpt_user *u)
1006 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1007 struct nfs4_client *clp = c->cn_session->se_client;
1009 spin_lock(&clp->cl_lock);
1010 if (!list_empty(&c->cn_persession)) {
1011 list_del(&c->cn_persession);
1014 nfsd4_probe_callback(clp);
1015 spin_unlock(&clp->cl_lock);
1018 static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1020 struct nfsd4_conn *conn;
1022 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1025 svc_xprt_get(rqstp->rq_xprt);
1026 conn->cn_xprt = rqstp->rq_xprt;
1027 conn->cn_flags = flags;
1028 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1032 static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1034 conn->cn_session = ses;
1035 list_add(&conn->cn_persession, &ses->se_conns);
1038 static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1040 struct nfs4_client *clp = ses->se_client;
1042 spin_lock(&clp->cl_lock);
1043 __nfsd4_hash_conn(conn, ses);
1044 spin_unlock(&clp->cl_lock);
1047 static int nfsd4_register_conn(struct nfsd4_conn *conn)
1049 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1050 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1053 static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1057 nfsd4_hash_conn(conn, ses);
1058 ret = nfsd4_register_conn(conn);
1060 /* oops; xprt is already down: */
1061 nfsd4_conn_lost(&conn->cn_xpt_user);
1062 if (conn->cn_flags & NFS4_CDFC4_BACK) {
1063 /* callback channel may be back up */
1064 nfsd4_probe_callback(ses->se_client);
1068 static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1070 u32 dir = NFS4_CDFC4_FORE;
1072 if (cses->flags & SESSION4_BACK_CHAN)
1073 dir |= NFS4_CDFC4_BACK;
1074 return alloc_conn(rqstp, dir);
1077 /* must be called under client_lock */
1078 static void nfsd4_del_conns(struct nfsd4_session *s)
1080 struct nfs4_client *clp = s->se_client;
1081 struct nfsd4_conn *c;
1083 spin_lock(&clp->cl_lock);
1084 while (!list_empty(&s->se_conns)) {
1085 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1086 list_del_init(&c->cn_persession);
1087 spin_unlock(&clp->cl_lock);
1089 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1092 spin_lock(&clp->cl_lock);
1094 spin_unlock(&clp->cl_lock);
1097 static void __free_session(struct nfsd4_session *ses)
1099 free_session_slots(ses);
1103 static void free_session(struct nfsd4_session *ses)
1105 struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id);
1107 lockdep_assert_held(&nn->client_lock);
1108 nfsd4_del_conns(ses);
1109 nfsd4_put_drc_mem(&ses->se_fchannel);
1110 __free_session(ses);
1113 static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1116 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1118 new->se_client = clp;
1121 INIT_LIST_HEAD(&new->se_conns);
1123 new->se_cb_seq_nr = 1;
1124 new->se_flags = cses->flags;
1125 new->se_cb_prog = cses->callback_prog;
1126 new->se_cb_sec = cses->cb_sec;
1127 atomic_set(&new->se_ref, 0);
1128 idx = hash_sessionid(&new->se_sessionid);
1129 spin_lock(&nn->client_lock);
1130 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1131 spin_lock(&clp->cl_lock);
1132 list_add(&new->se_perclnt, &clp->cl_sessions);
1133 spin_unlock(&clp->cl_lock);
1134 spin_unlock(&nn->client_lock);
1136 if (cses->flags & SESSION4_BACK_CHAN) {
1137 struct sockaddr *sa = svc_addr(rqstp);
1139 * This is a little silly; with sessions there's no real
1140 * use for the callback address. Use the peer address
1141 * as a reasonable default for now, but consider fixing
1142 * the rpc client not to require an address in the
1145 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1146 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1150 /* caller must hold client_lock */
1151 static struct nfsd4_session *
1152 __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1154 struct nfsd4_session *elem;
1156 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1158 dump_sessionid(__func__, sessionid);
1159 idx = hash_sessionid(sessionid);
1160 /* Search in the appropriate list */
1161 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1162 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1163 NFS4_MAX_SESSIONID_LEN)) {
1168 dprintk("%s: session not found\n", __func__);
1172 static struct nfsd4_session *
1173 find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1176 struct nfsd4_session *session;
1177 __be32 status = nfserr_badsession;
1179 session = __find_in_sessionid_hashtbl(sessionid, net);
1182 status = nfsd4_get_session_locked(session);
1190 /* caller must hold client_lock */
1192 unhash_session(struct nfsd4_session *ses)
1194 list_del(&ses->se_hash);
1195 spin_lock(&ses->se_client->cl_lock);
1196 list_del(&ses->se_perclnt);
1197 spin_unlock(&ses->se_client->cl_lock);
1200 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1202 STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1204 if (clid->cl_boot == nn->boot_time)
1206 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1207 clid->cl_boot, clid->cl_id, nn->boot_time);
1212 * XXX Should we use a slab cache ?
1213 * This type of memory management is somewhat inefficient, but we use it
1214 * anyway since SETCLIENTID is not a common operation.
1216 static struct nfs4_client *alloc_client(struct xdr_netobj name)
1218 struct nfs4_client *clp;
1220 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1223 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
1224 if (clp->cl_name.data == NULL) {
1228 clp->cl_name.len = name.len;
1229 INIT_LIST_HEAD(&clp->cl_sessions);
1230 idr_init(&clp->cl_stateids);
1231 atomic_set(&clp->cl_refcount, 0);
1232 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1233 INIT_LIST_HEAD(&clp->cl_idhash);
1234 INIT_LIST_HEAD(&clp->cl_openowners);
1235 INIT_LIST_HEAD(&clp->cl_delegations);
1236 INIT_LIST_HEAD(&clp->cl_lru);
1237 INIT_LIST_HEAD(&clp->cl_callbacks);
1238 INIT_LIST_HEAD(&clp->cl_revoked);
1239 spin_lock_init(&clp->cl_lock);
1240 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1245 free_client(struct nfs4_client *clp)
1247 struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id);
1249 lockdep_assert_held(&nn->client_lock);
1250 while (!list_empty(&clp->cl_sessions)) {
1251 struct nfsd4_session *ses;
1252 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1254 list_del(&ses->se_perclnt);
1255 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1258 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1259 free_svc_cred(&clp->cl_cred);
1260 kfree(clp->cl_name.data);
1261 idr_destroy(&clp->cl_stateids);
1265 /* must be called under the client_lock */
1267 unhash_client_locked(struct nfs4_client *clp)
1269 struct nfsd4_session *ses;
1271 list_del(&clp->cl_lru);
1272 spin_lock(&clp->cl_lock);
1273 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1274 list_del_init(&ses->se_hash);
1275 spin_unlock(&clp->cl_lock);
1279 destroy_client(struct nfs4_client *clp)
1281 struct nfs4_openowner *oo;
1282 struct nfs4_delegation *dp;
1283 struct list_head reaplist;
1284 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1286 INIT_LIST_HEAD(&reaplist);
1287 spin_lock(&state_lock);
1288 while (!list_empty(&clp->cl_delegations)) {
1289 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1290 list_del_init(&dp->dl_perclnt);
1291 /* Ensure that deleg break won't try to requeue it */
1293 list_move(&dp->dl_recall_lru, &reaplist);
1295 spin_unlock(&state_lock);
1296 while (!list_empty(&reaplist)) {
1297 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1298 destroy_delegation(dp);
1300 list_splice_init(&clp->cl_revoked, &reaplist);
1301 while (!list_empty(&reaplist)) {
1302 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1303 destroy_revoked_delegation(dp);
1305 while (!list_empty(&clp->cl_openowners)) {
1306 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1307 release_openowner(oo);
1309 nfsd4_shutdown_callback(clp);
1310 if (clp->cl_cb_conn.cb_xprt)
1311 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
1312 list_del(&clp->cl_idhash);
1313 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1314 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1316 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1317 spin_lock(&nn->client_lock);
1318 unhash_client_locked(clp);
1319 WARN_ON_ONCE(atomic_read(&clp->cl_refcount));
1321 spin_unlock(&nn->client_lock);
1324 static void expire_client(struct nfs4_client *clp)
1326 nfsd4_client_record_remove(clp);
1327 destroy_client(clp);
1330 static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1332 memcpy(target->cl_verifier.data, source->data,
1333 sizeof(target->cl_verifier.data));
1336 static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1338 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1339 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1342 static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1344 if (source->cr_principal) {
1345 target->cr_principal =
1346 kstrdup(source->cr_principal, GFP_KERNEL);
1347 if (target->cr_principal == NULL)
1350 target->cr_principal = NULL;
1351 target->cr_flavor = source->cr_flavor;
1352 target->cr_uid = source->cr_uid;
1353 target->cr_gid = source->cr_gid;
1354 target->cr_group_info = source->cr_group_info;
1355 get_group_info(target->cr_group_info);
1356 target->cr_gss_mech = source->cr_gss_mech;
1357 if (source->cr_gss_mech)
1358 gss_mech_get(source->cr_gss_mech);
1363 compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1367 res = o1->len - o2->len;
1370 return (long long)memcmp(o1->data, o2->data, o1->len);
1373 static int same_name(const char *n1, const char *n2)
1375 return 0 == memcmp(n1, n2, HEXDIR_LEN);
1379 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1381 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
1385 same_clid(clientid_t *cl1, clientid_t *cl2)
1387 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
1390 static bool groups_equal(struct group_info *g1, struct group_info *g2)
1394 if (g1->ngroups != g2->ngroups)
1396 for (i=0; i<g1->ngroups; i++)
1397 if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i)))
1403 * RFC 3530 language requires clid_inuse be returned when the
1404 * "principal" associated with a requests differs from that previously
1405 * used. We use uid, gid's, and gss principal string as our best
1406 * approximation. We also don't want to allow non-gss use of a client
1407 * established using gss: in theory cr_principal should catch that
1408 * change, but in practice cr_principal can be null even in the gss case
1409 * since gssd doesn't always pass down a principal string.
1411 static bool is_gss_cred(struct svc_cred *cr)
1413 /* Is cr_flavor one of the gss "pseudoflavors"?: */
1414 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
1419 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
1421 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
1422 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
1423 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
1424 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
1426 if (cr1->cr_principal == cr2->cr_principal)
1428 if (!cr1->cr_principal || !cr2->cr_principal)
1430 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
1433 static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
1435 struct svc_cred *cr = &rqstp->rq_cred;
1438 if (!cr->cr_gss_mech)
1440 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
1441 return service == RPC_GSS_SVC_INTEGRITY ||
1442 service == RPC_GSS_SVC_PRIVACY;
1445 static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
1447 struct svc_cred *cr = &rqstp->rq_cred;
1449 if (!cl->cl_mach_cred)
1451 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
1453 if (!svc_rqst_integrity_protected(rqstp))
1455 if (!cr->cr_principal)
1457 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
1460 static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
1462 static u32 current_clientid = 1;
1464 clp->cl_clientid.cl_boot = nn->boot_time;
1465 clp->cl_clientid.cl_id = current_clientid++;
1468 static void gen_confirm(struct nfs4_client *clp)
1474 * This is opaque to client, so no need to byte-swap. Use
1475 * __force to keep sparse happy
1477 verf[0] = (__force __be32)get_seconds();
1478 verf[1] = (__force __be32)i++;
1479 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
1482 static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t)
1484 struct nfs4_stid *ret;
1486 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
1487 if (!ret || !ret->sc_type)
1492 static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
1494 struct nfs4_stid *s;
1496 s = find_stateid(cl, t);
1499 if (typemask & s->sc_type)
1504 static struct nfs4_client *create_client(struct xdr_netobj name,
1505 struct svc_rqst *rqstp, nfs4_verifier *verf)
1507 struct nfs4_client *clp;
1508 struct sockaddr *sa = svc_addr(rqstp);
1510 struct net *net = SVC_NET(rqstp);
1511 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1513 clp = alloc_client(name);
1517 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
1519 spin_lock(&nn->client_lock);
1521 spin_unlock(&nn->client_lock);
1524 nfsd4_init_callback(&clp->cl_cb_null);
1525 clp->cl_time = get_seconds();
1526 clear_bit(0, &clp->cl_cb_slot_busy);
1527 copy_verf(clp, verf);
1528 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
1530 clp->cl_cb_session = NULL;
1536 add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
1538 struct rb_node **new = &(root->rb_node), *parent = NULL;
1539 struct nfs4_client *clp;
1542 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
1545 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
1546 new = &((*new)->rb_left);
1548 new = &((*new)->rb_right);
1551 rb_link_node(&new_clp->cl_namenode, parent, new);
1552 rb_insert_color(&new_clp->cl_namenode, root);
1555 static struct nfs4_client *
1556 find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
1559 struct rb_node *node = root->rb_node;
1560 struct nfs4_client *clp;
1563 clp = rb_entry(node, struct nfs4_client, cl_namenode);
1564 cmp = compare_blob(&clp->cl_name, name);
1566 node = node->rb_left;
1568 node = node->rb_right;
1576 add_to_unconfirmed(struct nfs4_client *clp)
1578 unsigned int idhashval;
1579 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1581 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1582 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
1583 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1584 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
1589 move_to_confirmed(struct nfs4_client *clp)
1591 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
1592 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1594 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
1595 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
1596 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1597 add_clp_to_name_tree(clp, &nn->conf_name_tree);
1598 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
1602 static struct nfs4_client *
1603 find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
1605 struct nfs4_client *clp;
1606 unsigned int idhashval = clientid_hashval(clid->cl_id);
1608 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
1609 if (same_clid(&clp->cl_clientid, clid)) {
1610 if ((bool)clp->cl_minorversion != sessions)
1619 static struct nfs4_client *
1620 find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1622 struct list_head *tbl = nn->conf_id_hashtbl;
1624 return find_client_in_id_table(tbl, clid, sessions);
1627 static struct nfs4_client *
1628 find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
1630 struct list_head *tbl = nn->unconf_id_hashtbl;
1632 return find_client_in_id_table(tbl, clid, sessions);
1635 static bool clp_used_exchangeid(struct nfs4_client *clp)
1637 return clp->cl_exchange_flags != 0;
1640 static struct nfs4_client *
1641 find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1643 return find_clp_in_name_tree(name, &nn->conf_name_tree);
1646 static struct nfs4_client *
1647 find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
1649 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
1653 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
1655 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
1656 struct sockaddr *sa = svc_addr(rqstp);
1657 u32 scopeid = rpc_get_scope_id(sa);
1658 unsigned short expected_family;
1660 /* Currently, we only support tcp and tcp6 for the callback channel */
1661 if (se->se_callback_netid_len == 3 &&
1662 !memcmp(se->se_callback_netid_val, "tcp", 3))
1663 expected_family = AF_INET;
1664 else if (se->se_callback_netid_len == 4 &&
1665 !memcmp(se->se_callback_netid_val, "tcp6", 4))
1666 expected_family = AF_INET6;
1670 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
1671 se->se_callback_addr_len,
1672 (struct sockaddr *)&conn->cb_addr,
1673 sizeof(conn->cb_addr));
1675 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
1678 if (conn->cb_addr.ss_family == AF_INET6)
1679 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
1681 conn->cb_prog = se->se_callback_prog;
1682 conn->cb_ident = se->se_callback_ident;
1683 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
1686 conn->cb_addr.ss_family = AF_UNSPEC;
1687 conn->cb_addrlen = 0;
1688 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
1689 "will not receive delegations\n",
1690 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1696 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
1699 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
1701 struct xdr_buf *buf = resp->xdr.buf;
1702 struct nfsd4_slot *slot = resp->cstate.slot;
1705 dprintk("--> %s slot %p\n", __func__, slot);
1707 slot->sl_opcnt = resp->opcnt;
1708 slot->sl_status = resp->cstate.status;
1710 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
1711 if (nfsd4_not_cached(resp)) {
1712 slot->sl_datalen = 0;
1715 base = resp->cstate.data_offset;
1716 slot->sl_datalen = buf->len - base;
1717 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
1718 WARN("%s: sessions DRC could not cache compound\n", __func__);
1723 * Encode the replay sequence operation from the slot values.
1724 * If cachethis is FALSE encode the uncached rep error on the next
1725 * operation which sets resp->p and increments resp->opcnt for
1726 * nfs4svc_encode_compoundres.
1730 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
1731 struct nfsd4_compoundres *resp)
1733 struct nfsd4_op *op;
1734 struct nfsd4_slot *slot = resp->cstate.slot;
1736 /* Encode the replayed sequence operation */
1737 op = &args->ops[resp->opcnt - 1];
1738 nfsd4_encode_operation(resp, op);
1740 /* Return nfserr_retry_uncached_rep in next operation. */
1741 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
1742 op = &args->ops[resp->opcnt++];
1743 op->status = nfserr_retry_uncached_rep;
1744 nfsd4_encode_operation(resp, op);
1750 * The sequence operation is not cached because we can use the slot and
1754 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
1755 struct nfsd4_sequence *seq)
1757 struct nfsd4_slot *slot = resp->cstate.slot;
1758 struct xdr_stream *xdr = &resp->xdr;
1762 dprintk("--> %s slot %p\n", __func__, slot);
1764 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
1768 p = xdr_reserve_space(xdr, slot->sl_datalen);
1771 return nfserr_serverfault;
1773 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
1774 xdr_commit_encode(xdr);
1776 resp->opcnt = slot->sl_opcnt;
1777 return slot->sl_status;
1781 * Set the exchange_id flags returned by the server.
1784 nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
1786 /* pNFS is not supported */
1787 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
1789 /* Referrals are supported, Migration is not. */
1790 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
1792 /* set the wire flags to return to client. */
1793 clid->flags = new->cl_exchange_flags;
1796 static bool client_has_state(struct nfs4_client *clp)
1799 * Note clp->cl_openowners check isn't quite right: there's no
1800 * need to count owners without stateid's.
1802 * Also note we should probably be using this in 4.0 case too.
1804 return !list_empty(&clp->cl_openowners)
1805 || !list_empty(&clp->cl_delegations)
1806 || !list_empty(&clp->cl_sessions);
1810 nfsd4_exchange_id(struct svc_rqst *rqstp,
1811 struct nfsd4_compound_state *cstate,
1812 struct nfsd4_exchange_id *exid)
1814 struct nfs4_client *unconf, *conf, *new;
1816 char addr_str[INET6_ADDRSTRLEN];
1817 nfs4_verifier verf = exid->verifier;
1818 struct sockaddr *sa = svc_addr(rqstp);
1819 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
1820 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1822 rpc_ntop(sa, addr_str, sizeof(addr_str));
1823 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
1824 "ip_addr=%s flags %x, spa_how %d\n",
1825 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
1826 addr_str, exid->flags, exid->spa_how);
1828 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
1829 return nfserr_inval;
1831 switch (exid->spa_how) {
1833 if (!svc_rqst_integrity_protected(rqstp))
1834 return nfserr_inval;
1837 default: /* checked by xdr code */
1840 return nfserr_encr_alg_unsupp;
1843 /* Cases below refer to rfc 5661 section 18.35.4: */
1845 conf = find_confirmed_client_by_name(&exid->clname, nn);
1847 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
1848 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
1851 if (!clp_used_exchangeid(conf)) { /* buggy client */
1852 status = nfserr_inval;
1855 if (!mach_creds_match(conf, rqstp)) {
1856 status = nfserr_wrong_cred;
1859 if (!creds_match) { /* case 9 */
1860 status = nfserr_perm;
1863 if (!verfs_match) { /* case 8 */
1864 status = nfserr_not_same;
1868 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
1872 if (!creds_match) { /* case 3 */
1873 if (client_has_state(conf)) {
1874 status = nfserr_clid_inuse;
1877 expire_client(conf);
1880 if (verfs_match) { /* case 2 */
1881 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
1885 /* case 5, client reboot */
1889 if (update) { /* case 7 */
1890 status = nfserr_noent;
1894 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
1895 if (unconf) /* case 4, possible retry or client restart */
1896 expire_client(unconf);
1898 /* case 1 (normal case) */
1900 new = create_client(exid->clname, rqstp, &verf);
1902 status = nfserr_jukebox;
1905 new->cl_minorversion = cstate->minorversion;
1906 new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
1909 add_to_unconfirmed(new);
1911 exid->clientid.cl_boot = new->cl_clientid.cl_boot;
1912 exid->clientid.cl_id = new->cl_clientid.cl_id;
1914 exid->seqid = new->cl_cs_slot.sl_seqid + 1;
1915 nfsd4_set_ex_flags(new, exid);
1917 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
1918 new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
1922 nfs4_unlock_state();
1927 check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
1929 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
1932 /* The slot is in use, and no response has been sent. */
1934 if (seqid == slot_seqid)
1935 return nfserr_jukebox;
1937 return nfserr_seq_misordered;
1939 /* Note unsigned 32-bit arithmetic handles wraparound: */
1940 if (likely(seqid == slot_seqid + 1))
1942 if (seqid == slot_seqid)
1943 return nfserr_replay_cache;
1944 return nfserr_seq_misordered;
1948 * Cache the create session result into the create session single DRC
1949 * slot cache by saving the xdr structure. sl_seqid has been set.
1950 * Do this for solo or embedded create session operations.
1953 nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
1954 struct nfsd4_clid_slot *slot, __be32 nfserr)
1956 slot->sl_status = nfserr;
1957 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
1961 nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
1962 struct nfsd4_clid_slot *slot)
1964 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
1965 return slot->sl_status;
1968 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
1969 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
1970 1 + /* MIN tag is length with zero, only length */ \
1971 3 + /* version, opcount, opcode */ \
1972 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1973 /* seqid, slotID, slotID, cache */ \
1974 4 ) * sizeof(__be32))
1976 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
1977 2 + /* verifier: AUTH_NULL, length 0 */\
1979 1 + /* MIN tag is length with zero, only length */ \
1980 3 + /* opcount, opcode, opstatus*/ \
1981 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
1982 /* seqid, slotID, slotID, slotID, status */ \
1983 5 ) * sizeof(__be32))
1985 static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
1987 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
1989 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
1990 return nfserr_toosmall;
1991 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
1992 return nfserr_toosmall;
1993 ca->headerpadsz = 0;
1994 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
1995 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
1996 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
1997 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
1998 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
1999 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2001 * Note decreasing slot size below client's request may make it
2002 * difficult for client to function correctly, whereas
2003 * decreasing the number of slots will (just?) affect
2004 * performance. When short on memory we therefore prefer to
2005 * decrease number of slots instead of their size. Clients that
2006 * request larger slots than they need will get poor results:
2008 ca->maxreqs = nfsd4_get_drc_mem(ca);
2010 return nfserr_jukebox;
2015 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2016 RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32))
2017 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2018 RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32))
2020 static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2022 ca->headerpadsz = 0;
2025 * These RPC_MAX_HEADER macros are overkill, especially since we
2026 * don't even do gss on the backchannel yet. But this is still
2027 * less than 1k. Tighten up this estimate in the unlikely event
2028 * it turns out to be a problem for some client:
2030 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
2031 return nfserr_toosmall;
2032 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
2033 return nfserr_toosmall;
2034 ca->maxresp_cached = 0;
2036 return nfserr_toosmall;
2041 static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2043 switch (cbs->flavor) {
2049 * GSS case: the spec doesn't allow us to return this
2050 * error. But it also doesn't allow us not to support
2052 * I'd rather this fail hard than return some error the
2053 * client might think it can already handle:
2055 return nfserr_encr_alg_unsupp;
2060 nfsd4_create_session(struct svc_rqst *rqstp,
2061 struct nfsd4_compound_state *cstate,
2062 struct nfsd4_create_session *cr_ses)
2064 struct sockaddr *sa = svc_addr(rqstp);
2065 struct nfs4_client *conf, *unconf;
2066 struct nfsd4_session *new;
2067 struct nfsd4_conn *conn;
2068 struct nfsd4_clid_slot *cs_slot = NULL;
2070 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2072 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2073 return nfserr_inval;
2074 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2077 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
2080 status = check_backchannel_attrs(&cr_ses->back_channel);
2082 goto out_release_drc_mem;
2083 status = nfserr_jukebox;
2084 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
2086 goto out_release_drc_mem;
2087 conn = alloc_conn_from_crses(rqstp, cr_ses);
2089 goto out_free_session;
2092 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
2093 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
2094 WARN_ON_ONCE(conf && unconf);
2097 status = nfserr_wrong_cred;
2098 if (!mach_creds_match(conf, rqstp))
2100 cs_slot = &conf->cl_cs_slot;
2101 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2102 if (status == nfserr_replay_cache) {
2103 status = nfsd4_replay_create_session(cr_ses, cs_slot);
2105 } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
2106 status = nfserr_seq_misordered;
2109 } else if (unconf) {
2110 struct nfs4_client *old;
2111 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
2112 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
2113 status = nfserr_clid_inuse;
2116 status = nfserr_wrong_cred;
2117 if (!mach_creds_match(unconf, rqstp))
2119 cs_slot = &unconf->cl_cs_slot;
2120 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2122 /* an unconfirmed replay returns misordered */
2123 status = nfserr_seq_misordered;
2126 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
2128 status = mark_client_expired(old);
2133 move_to_confirmed(unconf);
2136 status = nfserr_stale_clientid;
2141 * We do not support RDMA or persistent sessions
2143 cr_ses->flags &= ~SESSION4_PERSIST;
2144 cr_ses->flags &= ~SESSION4_RDMA;
2146 init_session(rqstp, new, conf, cr_ses);
2147 nfsd4_init_conn(rqstp, conn, new);
2149 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
2150 NFS4_MAX_SESSIONID_LEN);
2151 cs_slot->sl_seqid++;
2152 cr_ses->seqid = cs_slot->sl_seqid;
2154 /* cache solo and embedded create sessions under the state lock */
2155 nfsd4_cache_create_session(cr_ses, cs_slot, status);
2156 nfs4_unlock_state();
2159 nfs4_unlock_state();
2162 __free_session(new);
2163 out_release_drc_mem:
2164 nfsd4_put_drc_mem(&cr_ses->fore_channel);
2168 static __be32 nfsd4_map_bcts_dir(u32 *dir)
2171 case NFS4_CDFC4_FORE:
2172 case NFS4_CDFC4_BACK:
2174 case NFS4_CDFC4_FORE_OR_BOTH:
2175 case NFS4_CDFC4_BACK_OR_BOTH:
2176 *dir = NFS4_CDFC4_BOTH;
2179 return nfserr_inval;
2182 __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2184 struct nfsd4_session *session = cstate->session;
2185 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2188 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2191 spin_lock(&nn->client_lock);
2192 session->se_cb_prog = bc->bc_cb_program;
2193 session->se_cb_sec = bc->bc_cb_sec;
2194 spin_unlock(&nn->client_lock);
2196 nfsd4_probe_callback(session->se_client);
2201 __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2202 struct nfsd4_compound_state *cstate,
2203 struct nfsd4_bind_conn_to_session *bcts)
2206 struct nfsd4_conn *conn;
2207 struct nfsd4_session *session;
2208 struct net *net = SVC_NET(rqstp);
2209 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2211 if (!nfsd4_last_compound_op(rqstp))
2212 return nfserr_not_only_op;
2214 spin_lock(&nn->client_lock);
2215 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
2216 spin_unlock(&nn->client_lock);
2218 goto out_no_session;
2219 status = nfserr_wrong_cred;
2220 if (!mach_creds_match(session->se_client, rqstp))
2222 status = nfsd4_map_bcts_dir(&bcts->dir);
2225 conn = alloc_conn(rqstp, bcts->dir);
2226 status = nfserr_jukebox;
2229 nfsd4_init_conn(rqstp, conn, session);
2232 nfsd4_put_session(session);
2234 nfs4_unlock_state();
2238 static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2242 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2246 nfsd4_destroy_session(struct svc_rqst *r,
2247 struct nfsd4_compound_state *cstate,
2248 struct nfsd4_destroy_session *sessionid)
2250 struct nfsd4_session *ses;
2252 int ref_held_by_me = 0;
2253 struct net *net = SVC_NET(r);
2254 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2257 status = nfserr_not_only_op;
2258 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
2259 if (!nfsd4_last_compound_op(r))
2263 dump_sessionid(__func__, &sessionid->sessionid);
2264 spin_lock(&nn->client_lock);
2265 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
2267 goto out_client_lock;
2268 status = nfserr_wrong_cred;
2269 if (!mach_creds_match(ses->se_client, r))
2270 goto out_put_session;
2271 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
2273 goto out_put_session;
2274 unhash_session(ses);
2275 spin_unlock(&nn->client_lock);
2277 nfsd4_probe_callback_sync(ses->se_client);
2279 spin_lock(&nn->client_lock);
2282 nfsd4_put_session_locked(ses);
2284 spin_unlock(&nn->client_lock);
2286 nfs4_unlock_state();
2290 static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
2292 struct nfsd4_conn *c;
2294 list_for_each_entry(c, &s->se_conns, cn_persession) {
2295 if (c->cn_xprt == xpt) {
2302 static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
2304 struct nfs4_client *clp = ses->se_client;
2305 struct nfsd4_conn *c;
2306 __be32 status = nfs_ok;
2309 spin_lock(&clp->cl_lock);
2310 c = __nfsd4_find_conn(new->cn_xprt, ses);
2313 status = nfserr_conn_not_bound_to_session;
2314 if (clp->cl_mach_cred)
2316 __nfsd4_hash_conn(new, ses);
2317 spin_unlock(&clp->cl_lock);
2318 ret = nfsd4_register_conn(new);
2320 /* oops; xprt is already down: */
2321 nfsd4_conn_lost(&new->cn_xpt_user);
2324 spin_unlock(&clp->cl_lock);
2329 static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2331 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2333 return args->opcnt > session->se_fchannel.maxops;
2336 static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2337 struct nfsd4_session *session)
2339 struct xdr_buf *xb = &rqstp->rq_arg;
2341 return xb->len > session->se_fchannel.maxreq_sz;
2345 nfsd4_sequence(struct svc_rqst *rqstp,
2346 struct nfsd4_compound_state *cstate,
2347 struct nfsd4_sequence *seq)
2349 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2350 struct xdr_stream *xdr = &resp->xdr;
2351 struct nfsd4_session *session;
2352 struct nfs4_client *clp;
2353 struct nfsd4_slot *slot;
2354 struct nfsd4_conn *conn;
2357 struct net *net = SVC_NET(rqstp);
2358 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2360 if (resp->opcnt != 1)
2361 return nfserr_sequence_pos;
2364 * Will be either used or freed by nfsd4_sequence_check_conn
2367 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
2369 return nfserr_jukebox;
2371 spin_lock(&nn->client_lock);
2372 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
2374 goto out_no_session;
2375 clp = session->se_client;
2377 status = nfserr_too_many_ops;
2378 if (nfsd4_session_too_many_ops(rqstp, session))
2379 goto out_put_session;
2381 status = nfserr_req_too_big;
2382 if (nfsd4_request_too_big(rqstp, session))
2383 goto out_put_session;
2385 status = nfserr_badslot;
2386 if (seq->slotid >= session->se_fchannel.maxreqs)
2387 goto out_put_session;
2389 slot = session->se_slots[seq->slotid];
2390 dprintk("%s: slotid %d\n", __func__, seq->slotid);
2392 /* We do not negotiate the number of slots yet, so set the
2393 * maxslots to the session maxreqs which is used to encode
2394 * sr_highest_slotid and the sr_target_slot id to maxslots */
2395 seq->maxslots = session->se_fchannel.maxreqs;
2397 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
2398 slot->sl_flags & NFSD4_SLOT_INUSE);
2399 if (status == nfserr_replay_cache) {
2400 status = nfserr_seq_misordered;
2401 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
2402 goto out_put_session;
2403 cstate->slot = slot;
2404 cstate->session = session;
2406 /* Return the cached reply status and set cstate->status
2407 * for nfsd4_proc_compound processing */
2408 status = nfsd4_replay_cache_entry(resp, seq);
2409 cstate->status = nfserr_replay_cache;
2413 goto out_put_session;
2415 status = nfsd4_sequence_check_conn(conn, session);
2418 goto out_put_session;
2420 buflen = (seq->cachethis) ?
2421 session->se_fchannel.maxresp_cached :
2422 session->se_fchannel.maxresp_sz;
2423 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
2425 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
2426 goto out_put_session;
2427 svc_reserve(rqstp, buflen);
2430 /* Success! bump slot seqid */
2431 slot->sl_seqid = seq->seqid;
2432 slot->sl_flags |= NFSD4_SLOT_INUSE;
2434 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
2436 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
2438 cstate->slot = slot;
2439 cstate->session = session;
2443 switch (clp->cl_cb_state) {
2445 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
2447 case NFSD4_CB_FAULT:
2448 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
2451 seq->status_flags = 0;
2453 if (!list_empty(&clp->cl_revoked))
2454 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
2458 spin_unlock(&nn->client_lock);
2461 nfsd4_put_session_locked(session);
2462 goto out_no_session;
2466 nfsd4_sequence_done(struct nfsd4_compoundres *resp)
2468 struct nfsd4_compound_state *cs = &resp->cstate;
2470 if (nfsd4_has_session(cs)) {
2471 if (cs->status != nfserr_replay_cache) {
2472 nfsd4_store_cache_entry(resp);
2473 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
2475 /* Drop session reference that was taken in nfsd4_sequence() */
2476 nfsd4_put_session(cs->session);
2478 put_client_renew(cs->clp);
2482 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
2484 struct nfs4_client *conf, *unconf, *clp;
2486 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2489 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
2490 conf = find_confirmed_client(&dc->clientid, true, nn);
2491 WARN_ON_ONCE(conf && unconf);
2496 if (client_has_state(conf)) {
2497 status = nfserr_clientid_busy;
2503 status = nfserr_stale_clientid;
2506 if (!mach_creds_match(clp, rqstp)) {
2507 status = nfserr_wrong_cred;
2512 nfs4_unlock_state();
2517 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
2521 if (rc->rca_one_fs) {
2522 if (!cstate->current_fh.fh_dentry)
2523 return nfserr_nofilehandle;
2525 * We don't take advantage of the rca_one_fs case.
2526 * That's OK, it's optional, we can safely ignore it.
2532 status = nfserr_complete_already;
2533 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
2534 &cstate->session->se_client->cl_flags))
2537 status = nfserr_stale_clientid;
2538 if (is_client_expired(cstate->session->se_client))
2540 * The following error isn't really legal.
2541 * But we only get here if the client just explicitly
2542 * destroyed the client. Surely it no longer cares what
2543 * error it gets back on an operation for the dead
2549 nfsd4_client_record_create(cstate->session->se_client);
2551 nfs4_unlock_state();
2556 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2557 struct nfsd4_setclientid *setclid)
2559 struct xdr_netobj clname = setclid->se_name;
2560 nfs4_verifier clverifier = setclid->se_verf;
2561 struct nfs4_client *conf, *unconf, *new;
2563 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2565 /* Cases below refer to rfc 3530 section 14.2.33: */
2567 conf = find_confirmed_client_by_name(&clname, nn);
2570 status = nfserr_clid_inuse;
2571 if (clp_used_exchangeid(conf))
2573 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
2574 char addr_str[INET6_ADDRSTRLEN];
2575 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
2577 dprintk("NFSD: setclientid: string in use by client "
2578 "at %s\n", addr_str);
2582 unconf = find_unconfirmed_client_by_name(&clname, nn);
2584 expire_client(unconf);
2585 status = nfserr_jukebox;
2586 new = create_client(clname, rqstp, &clverifier);
2589 if (conf && same_verf(&conf->cl_verifier, &clverifier))
2590 /* case 1: probable callback update */
2591 copy_clid(new, conf);
2592 else /* case 4 (new client) or cases 2, 3 (client reboot): */
2594 new->cl_minorversion = 0;
2595 gen_callback(new, setclid, rqstp);
2596 add_to_unconfirmed(new);
2597 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
2598 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
2599 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
2602 nfs4_unlock_state();
2608 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
2609 struct nfsd4_compound_state *cstate,
2610 struct nfsd4_setclientid_confirm *setclientid_confirm)
2612 struct nfs4_client *conf, *unconf;
2613 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
2614 clientid_t * clid = &setclientid_confirm->sc_clientid;
2616 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2618 if (STALE_CLIENTID(clid, nn))
2619 return nfserr_stale_clientid;
2622 conf = find_confirmed_client(clid, false, nn);
2623 unconf = find_unconfirmed_client(clid, false, nn);
2625 * We try hard to give out unique clientid's, so if we get an
2626 * attempt to confirm the same clientid with a different cred,
2627 * there's a bug somewhere. Let's charitably assume it's our
2630 status = nfserr_serverfault;
2631 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
2633 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
2635 /* cases below refer to rfc 3530 section 14.2.34: */
2636 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
2637 if (conf && !unconf) /* case 2: probable retransmit */
2639 else /* case 4: client hasn't noticed we rebooted yet? */
2640 status = nfserr_stale_clientid;
2644 if (conf) { /* case 1: callback update */
2645 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
2646 nfsd4_probe_callback(conf);
2647 expire_client(unconf);
2648 } else { /* case 3: normal case; new or rebooted client */
2649 conf = find_confirmed_client_by_name(&unconf->cl_name, nn);
2651 status = mark_client_expired(conf);
2654 expire_client(conf);
2656 move_to_confirmed(unconf);
2657 nfsd4_probe_callback(unconf);
2660 nfs4_unlock_state();
2664 static struct nfs4_file *nfsd4_alloc_file(void)
2666 return kmem_cache_alloc(file_slab, GFP_KERNEL);
2669 /* OPEN Share state helper functions */
2670 static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino)
2672 unsigned int hashval = file_hashval(ino);
2674 lockdep_assert_held(&state_lock);
2676 atomic_set(&fp->fi_ref, 1);
2677 INIT_LIST_HEAD(&fp->fi_stateids);
2678 INIT_LIST_HEAD(&fp->fi_delegations);
2681 fp->fi_had_conflict = false;
2682 fp->fi_lease = NULL;
2683 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
2684 memset(fp->fi_access, 0, sizeof(fp->fi_access));
2685 hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
2689 nfsd4_free_slabs(void)
2691 kmem_cache_destroy(openowner_slab);
2692 kmem_cache_destroy(lockowner_slab);
2693 kmem_cache_destroy(file_slab);
2694 kmem_cache_destroy(stateid_slab);
2695 kmem_cache_destroy(deleg_slab);
2699 nfsd4_init_slabs(void)
2701 openowner_slab = kmem_cache_create("nfsd4_openowners",
2702 sizeof(struct nfs4_openowner), 0, 0, NULL);
2703 if (openowner_slab == NULL)
2705 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
2706 sizeof(struct nfs4_lockowner), 0, 0, NULL);
2707 if (lockowner_slab == NULL)
2708 goto out_free_openowner_slab;
2709 file_slab = kmem_cache_create("nfsd4_files",
2710 sizeof(struct nfs4_file), 0, 0, NULL);
2711 if (file_slab == NULL)
2712 goto out_free_lockowner_slab;
2713 stateid_slab = kmem_cache_create("nfsd4_stateids",
2714 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
2715 if (stateid_slab == NULL)
2716 goto out_free_file_slab;
2717 deleg_slab = kmem_cache_create("nfsd4_delegations",
2718 sizeof(struct nfs4_delegation), 0, 0, NULL);
2719 if (deleg_slab == NULL)
2720 goto out_free_stateid_slab;
2723 out_free_stateid_slab:
2724 kmem_cache_destroy(stateid_slab);
2726 kmem_cache_destroy(file_slab);
2727 out_free_lockowner_slab:
2728 kmem_cache_destroy(lockowner_slab);
2729 out_free_openowner_slab:
2730 kmem_cache_destroy(openowner_slab);
2732 dprintk("nfsd4: out of memory while initializing nfsv4\n");
2736 static void init_nfs4_replay(struct nfs4_replay *rp)
2738 rp->rp_status = nfserr_serverfault;
2740 rp->rp_buf = rp->rp_ibuf;
2743 static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
2745 struct nfs4_stateowner *sop;
2747 sop = kmem_cache_alloc(slab, GFP_KERNEL);
2751 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
2752 if (!sop->so_owner.data) {
2753 kmem_cache_free(slab, sop);
2756 sop->so_owner.len = owner->len;
2758 INIT_LIST_HEAD(&sop->so_stateids);
2759 sop->so_client = clp;
2760 init_nfs4_replay(&sop->so_replay);
2764 static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
2766 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2768 list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
2769 list_add(&oo->oo_perclient, &clp->cl_openowners);
2772 static struct nfs4_openowner *
2773 alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
2774 struct nfsd4_compound_state *cstate)
2776 struct nfs4_client *clp = cstate->clp;
2777 struct nfs4_openowner *oo;
2779 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
2782 oo->oo_owner.so_is_open_owner = 1;
2783 oo->oo_owner.so_seqid = open->op_seqid;
2784 oo->oo_flags = NFS4_OO_NEW;
2785 if (nfsd4_has_session(cstate))
2786 oo->oo_flags |= NFS4_OO_CONFIRMED;
2788 oo->oo_last_closed_stid = NULL;
2789 INIT_LIST_HEAD(&oo->oo_close_lru);
2790 hash_openowner(oo, clp, strhashval);
2794 static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
2795 struct nfs4_openowner *oo = open->op_openowner;
2797 stp->st_stid.sc_type = NFS4_OPEN_STID;
2798 INIT_LIST_HEAD(&stp->st_locks);
2799 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
2800 list_add(&stp->st_perfile, &fp->fi_stateids);
2801 stp->st_stateowner = &oo->oo_owner;
2804 stp->st_access_bmap = 0;
2805 stp->st_deny_bmap = 0;
2806 set_access(open->op_share_access, stp);
2807 set_deny(open->op_share_deny, stp);
2808 stp->st_openstp = NULL;
2812 move_to_close_lru(struct nfs4_openowner *oo, struct net *net)
2814 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2816 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
2818 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
2819 oo->oo_time = get_seconds();
2823 same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner,
2826 return (sop->so_owner.len == owner->len) &&
2827 0 == memcmp(sop->so_owner.data, owner->data, owner->len) &&
2828 (sop->so_client->cl_clientid.cl_id == clid->cl_id);
2831 static struct nfs4_openowner *
2832 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
2833 bool sessions, struct nfsd_net *nn)
2835 struct nfs4_stateowner *so;
2836 struct nfs4_openowner *oo;
2837 struct nfs4_client *clp;
2839 list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) {
2840 if (!so->so_is_open_owner)
2842 if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {
2844 clp = oo->oo_owner.so_client;
2845 if ((bool)clp->cl_minorversion != sessions)
2847 renew_client(oo->oo_owner.so_client);
2854 /* search file_hashtbl[] for file */
2855 static struct nfs4_file *
2856 find_file_locked(struct inode *ino)
2858 unsigned int hashval = file_hashval(ino);
2859 struct nfs4_file *fp;
2861 lockdep_assert_held(&state_lock);
2863 hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
2864 if (fp->fi_inode == ino) {
2872 static struct nfs4_file *
2873 find_file(struct inode *ino)
2875 struct nfs4_file *fp;
2877 spin_lock(&state_lock);
2878 fp = find_file_locked(ino);
2879 spin_unlock(&state_lock);
2883 static struct nfs4_file *
2884 find_or_add_file(struct inode *ino, struct nfs4_file *new)
2886 struct nfs4_file *fp;
2888 spin_lock(&state_lock);
2889 fp = find_file_locked(ino);
2891 nfsd4_init_file(new, ino);
2894 spin_unlock(&state_lock);
2900 * Called to check deny when READ with all zero stateid or
2901 * WRITE with all zero or all one stateid
2904 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
2906 struct inode *ino = current_fh->fh_dentry->d_inode;
2907 struct nfs4_file *fp;
2908 struct nfs4_ol_stateid *stp;
2911 fp = find_file(ino);
2914 ret = nfserr_locked;
2915 /* Search for conflicting share reservations */
2916 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
2917 if (test_deny(deny_type, stp) ||
2918 test_deny(NFS4_SHARE_DENY_BOTH, stp))
2927 static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
2929 struct nfs4_client *clp = dp->dl_stid.sc_client;
2930 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2932 lockdep_assert_held(&state_lock);
2933 /* We're assuming the state code never drops its reference
2934 * without first removing the lease. Since we're in this lease
2935 * callback (and since the lease code is serialized by the kernel
2936 * lock) we know the server hasn't removed the lease yet, we know
2937 * it's safe to take a reference: */
2938 atomic_inc(&dp->dl_count);
2941 * If the dl_time != 0, then we know that it has already been
2942 * queued for a lease break. Don't queue it again.
2944 if (dp->dl_time == 0) {
2945 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
2946 dp->dl_time = get_seconds();
2949 block_delegations(&dp->dl_fh);
2951 nfsd4_cb_recall(dp);
2954 /* Called from break_lease() with i_lock held. */
2955 static void nfsd_break_deleg_cb(struct file_lock *fl)
2957 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
2958 struct nfs4_delegation *dp;
2961 WARN(1, "(%p)->fl_owner NULL\n", fl);
2964 if (fp->fi_had_conflict) {
2965 WARN(1, "duplicate break on %p\n", fp);
2969 * We don't want the locks code to timeout the lease for us;
2970 * we'll remove it ourself if a delegation isn't returned
2973 fl->fl_break_time = 0;
2975 spin_lock(&state_lock);
2976 fp->fi_had_conflict = true;
2977 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
2978 nfsd_break_one_deleg(dp);
2979 spin_unlock(&state_lock);
2983 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
2986 return lease_modify(onlist, arg);
2991 static const struct lock_manager_operations nfsd_lease_mng_ops = {
2992 .lm_break = nfsd_break_deleg_cb,
2993 .lm_change = nfsd_change_deleg_cb,
2996 static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
2998 if (nfsd4_has_session(cstate))
3000 if (seqid == so->so_seqid - 1)
3001 return nfserr_replay_me;
3002 if (seqid == so->so_seqid)
3004 return nfserr_bad_seqid;
3007 static __be32 lookup_clientid(clientid_t *clid,
3008 struct nfsd4_compound_state *cstate,
3009 struct nfsd_net *nn)
3011 struct nfs4_client *found;
3014 found = cstate->clp;
3015 if (!same_clid(&found->cl_clientid, clid))
3016 return nfserr_stale_clientid;
3020 if (STALE_CLIENTID(clid, nn))
3021 return nfserr_stale_clientid;
3024 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3025 * cached already then we know this is for is for v4.0 and "sessions"
3028 WARN_ON_ONCE(cstate->session);
3029 found = find_confirmed_client(clid, false, nn);
3031 return nfserr_expired;
3033 /* Cache the nfs4_client in cstate! */
3034 cstate->clp = found;
3035 atomic_inc(&found->cl_refcount);
3040 nfsd4_process_open1(struct nfsd4_compound_state *cstate,
3041 struct nfsd4_open *open, struct nfsd_net *nn)
3043 clientid_t *clientid = &open->op_clientid;
3044 struct nfs4_client *clp = NULL;
3045 unsigned int strhashval;
3046 struct nfs4_openowner *oo = NULL;
3049 if (STALE_CLIENTID(&open->op_clientid, nn))
3050 return nfserr_stale_clientid;
3052 * In case we need it later, after we've already created the
3053 * file and don't want to risk a further failure:
3055 open->op_file = nfsd4_alloc_file();
3056 if (open->op_file == NULL)
3057 return nfserr_jukebox;
3059 status = lookup_clientid(clientid, cstate, nn);
3064 strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);
3065 oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn);
3066 open->op_openowner = oo;
3070 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
3071 /* Replace unconfirmed owners without checking for replay. */
3072 release_openowner(oo);
3073 open->op_openowner = NULL;
3076 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3081 oo = alloc_init_open_stateowner(strhashval, open, cstate);
3083 return nfserr_jukebox;
3084 open->op_openowner = oo;
3086 open->op_stp = nfs4_alloc_stateid(clp);
3088 return nfserr_jukebox;
3092 static inline __be32
3093 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3095 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3096 return nfserr_openmode;
3101 static int share_access_to_flags(u32 share_access)
3103 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3106 static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
3108 struct nfs4_stid *ret;
3110 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
3113 return delegstateid(ret);
3116 static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3118 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3119 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3123 nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
3124 struct nfs4_delegation **dp)
3127 __be32 status = nfserr_bad_stateid;
3129 *dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
3132 flags = share_access_to_flags(open->op_share_access);
3133 status = nfs4_check_delegmode(*dp, flags);
3137 if (!nfsd4_is_deleg_cur(open))
3141 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3146 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp)
3148 struct nfs4_ol_stateid *local;
3149 struct nfs4_openowner *oo = open->op_openowner;
3151 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3152 /* ignore lock owners */
3153 if (local->st_stateowner->so_is_open_owner == 0)
3155 /* remember if we have seen this open owner */
3156 if (local->st_stateowner == &oo->oo_owner)
3158 /* check for conflicting share reservations */
3159 if (!test_share(local, open))
3160 return nfserr_share_denied;
3165 static inline int nfs4_access_to_access(u32 nfs4_access)
3169 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
3170 flags |= NFSD_MAY_READ;
3171 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
3172 flags |= NFSD_MAY_WRITE;
3176 static inline __be32
3177 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
3178 struct nfsd4_open *open)
3180 struct iattr iattr = {
3181 .ia_valid = ATTR_SIZE,
3184 if (!open->op_truncate)
3186 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
3187 return nfserr_inval;
3188 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
3191 static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
3192 struct svc_fh *cur_fh, struct nfsd4_open *open)
3195 int oflag = nfs4_access_to_omode(open->op_share_access);
3196 int access = nfs4_access_to_access(open->op_share_access);
3198 if (!fp->fi_fds[oflag]) {
3199 status = nfsd_open(rqstp, cur_fh, S_IFREG, access,
3200 &fp->fi_fds[oflag]);
3204 nfs4_file_get_access(fp, oflag);
3206 status = nfsd4_truncate(rqstp, cur_fh, open);
3208 goto out_put_access;
3213 nfs4_file_put_access(fp, oflag);
3219 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)
3221 u32 op_share_access = open->op_share_access;
3224 if (!test_access(op_share_access, stp))
3225 status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
3227 status = nfsd4_truncate(rqstp, cur_fh, open);
3232 /* remember the open */
3233 set_access(op_share_access, stp);
3234 set_deny(open->op_share_deny, stp);
3240 nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session)
3242 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
3245 /* Should we give out recallable state?: */
3246 static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
3248 if (clp->cl_cb_state == NFSD4_CB_UP)
3251 * In the sessions case, since we don't have to establish a
3252 * separate connection for callbacks, we assume it's OK
3253 * until we hear otherwise:
3255 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
3258 static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag)
3260 struct file_lock *fl;
3262 fl = locks_alloc_lock();
3265 locks_init_lock(fl);
3266 fl->fl_lmops = &nfsd_lease_mng_ops;
3267 fl->fl_flags = FL_DELEG;
3268 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
3269 fl->fl_end = OFFSET_MAX;
3270 fl->fl_owner = (fl_owner_t)(dp->dl_file);
3271 fl->fl_pid = current->tgid;
3275 static int nfs4_setlease(struct nfs4_delegation *dp)
3277 struct nfs4_file *fp = dp->dl_file;
3278 struct file_lock *fl;
3281 fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ);
3284 fl->fl_file = find_readable_file(fp);
3285 status = vfs_setlease(fl->fl_file, fl->fl_type, &fl);
3289 fp->fi_deleg_file = get_file(fl->fl_file);
3290 atomic_set(&fp->fi_delegees, 1);
3291 spin_lock(&state_lock);
3292 hash_delegation_locked(dp, fp);
3293 spin_unlock(&state_lock);
3296 locks_free_lock(fl);
3300 static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp)
3302 if (fp->fi_had_conflict)
3307 return nfs4_setlease(dp);
3308 spin_lock(&state_lock);
3309 atomic_inc(&fp->fi_delegees);
3310 if (fp->fi_had_conflict) {
3311 spin_unlock(&state_lock);
3314 hash_delegation_locked(dp, fp);
3315 spin_unlock(&state_lock);
3319 static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
3321 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3322 if (status == -EAGAIN)
3323 open->op_why_no_deleg = WND4_CONTENTION;
3325 open->op_why_no_deleg = WND4_RESOURCE;
3326 switch (open->op_deleg_want) {
3327 case NFS4_SHARE_WANT_READ_DELEG:
3328 case NFS4_SHARE_WANT_WRITE_DELEG:
3329 case NFS4_SHARE_WANT_ANY_DELEG:
3331 case NFS4_SHARE_WANT_CANCEL:
3332 open->op_why_no_deleg = WND4_CANCELLED;
3334 case NFS4_SHARE_WANT_NO_DELEG:
3341 * Attempt to hand out a delegation.
3343 * Note we don't support write delegations, and won't until the vfs has
3344 * proper support for them.
3347 nfs4_open_delegation(struct net *net, struct svc_fh *fh,
3348 struct nfsd4_open *open, struct nfs4_ol_stateid *stp)
3350 struct nfs4_delegation *dp;
3351 struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner);
3355 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
3356 open->op_recall = 0;
3357 switch (open->op_claim_type) {
3358 case NFS4_OPEN_CLAIM_PREVIOUS:
3360 open->op_recall = 1;
3361 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
3364 case NFS4_OPEN_CLAIM_NULL:
3365 case NFS4_OPEN_CLAIM_FH:
3367 * Let's not give out any delegations till everyone's
3368 * had the chance to reclaim theirs....
3370 if (locks_in_grace(net))
3372 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
3375 * Also, if the file was opened for write or
3376 * create, there's a good chance the client's
3377 * about to write to it, resulting in an
3378 * immediate recall (since we don't support
3379 * write delegations):
3381 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
3383 if (open->op_create == NFS4_OPEN_CREATE)
3389 dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh);
3392 status = nfs4_set_delegation(dp, stp->st_file);
3396 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
3398 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
3399 STATEID_VAL(&dp->dl_stid.sc_stateid));
3400 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
3403 destroy_delegation(dp);
3405 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
3406 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
3407 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
3408 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
3409 open->op_recall = 1;
3412 /* 4.1 client asking for a delegation? */
3413 if (open->op_deleg_want)
3414 nfsd4_open_deleg_none_ext(open, status);
3418 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
3419 struct nfs4_delegation *dp)
3421 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
3422 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3423 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3424 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
3425 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
3426 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
3427 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3428 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
3430 /* Otherwise the client must be confused wanting a delegation
3431 * it already has, therefore we don't return
3432 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
3437 * called with nfs4_lock_state() held.
3440 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
3442 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3443 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
3444 struct nfs4_file *fp = NULL;
3445 struct inode *ino = current_fh->fh_dentry->d_inode;
3446 struct nfs4_ol_stateid *stp = NULL;
3447 struct nfs4_delegation *dp = NULL;
3451 * Lookup file; if found, lookup stateid and check open request,
3452 * and check for delegations in the process of being recalled.
3453 * If not found, create the nfs4_file struct
3455 fp = find_or_add_file(ino, open->op_file);
3456 if (fp != open->op_file) {
3457 if ((status = nfs4_check_open(fp, open, &stp)))
3459 status = nfs4_check_deleg(cl, open, &dp);
3463 open->op_file = NULL;
3464 status = nfserr_bad_stateid;
3465 if (nfsd4_is_deleg_cur(open))
3467 status = nfserr_jukebox;
3471 * OPEN the file, or upgrade an existing OPEN.
3472 * If truncate fails, the OPEN fails.
3475 /* Stateid was found, this is an OPEN upgrade */
3476 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
3480 status = nfs4_get_vfs_file(rqstp, fp, current_fh, open);
3484 open->op_stp = NULL;
3485 init_open_stateid(stp, fp, open);
3487 update_stateid(&stp->st_stid.sc_stateid);
3488 memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
3490 if (nfsd4_has_session(&resp->cstate)) {
3491 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
3492 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
3493 open->op_why_no_deleg = WND4_NOT_WANTED;
3499 * Attempt to hand out a delegation. No error return, because the
3500 * OPEN succeeds even if we fail.
3502 nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp);
3506 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
3507 STATEID_VAL(&stp->st_stid.sc_stateid));
3509 /* 4.1 client trying to upgrade/downgrade delegation? */
3510 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
3511 open->op_deleg_want)
3512 nfsd4_deleg_xgrade_none_ext(open, dp);
3516 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
3517 nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate));
3519 * To finish the open response, we just need to set the rflags.
3521 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
3522 if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
3523 !nfsd4_has_session(&resp->cstate))
3524 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
3529 void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
3531 if (open->op_openowner) {
3532 struct nfs4_openowner *oo = open->op_openowner;
3534 if (!list_empty(&oo->oo_owner.so_stateids))
3535 list_del_init(&oo->oo_close_lru);
3536 if (oo->oo_flags & NFS4_OO_NEW) {
3538 release_openowner(oo);
3539 open->op_openowner = NULL;
3541 oo->oo_flags &= ~NFS4_OO_NEW;
3545 nfsd4_free_file(open->op_file);
3547 free_generic_stateid(open->op_stp);
3551 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3554 struct nfs4_client *clp;
3556 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3559 dprintk("process_renew(%08x/%08x): starting\n",
3560 clid->cl_boot, clid->cl_id);
3561 status = lookup_clientid(clid, cstate, nn);
3565 status = nfserr_cb_path_down;
3566 if (!list_empty(&clp->cl_delegations)
3567 && clp->cl_cb_state != NFSD4_CB_UP)
3571 nfs4_unlock_state();
3576 nfsd4_end_grace(struct nfsd_net *nn)
3578 /* do nothing if grace period already ended */
3579 if (nn->grace_ended)
3582 dprintk("NFSD: end of grace period\n");
3583 nn->grace_ended = true;
3584 nfsd4_record_grace_done(nn, nn->boot_time);
3585 locks_end_grace(&nn->nfsd4_manager);
3587 * Now that every NFSv4 client has had the chance to recover and
3588 * to see the (possibly new, possibly shorter) lease time, we
3589 * can safely set the next grace time to the current lease time:
3591 nn->nfsd4_grace = nn->nfsd4_lease;
3595 nfs4_laundromat(struct nfsd_net *nn)
3597 struct nfs4_client *clp;
3598 struct nfs4_openowner *oo;
3599 struct nfs4_delegation *dp;
3600 struct list_head *pos, *next, reaplist;
3601 time_t cutoff = get_seconds() - nn->nfsd4_lease;
3602 time_t t, new_timeo = nn->nfsd4_lease;
3606 dprintk("NFSD: laundromat service - starting\n");
3607 nfsd4_end_grace(nn);
3608 INIT_LIST_HEAD(&reaplist);
3609 spin_lock(&nn->client_lock);
3610 list_for_each_safe(pos, next, &nn->client_lru) {
3611 clp = list_entry(pos, struct nfs4_client, cl_lru);
3612 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
3613 t = clp->cl_time - cutoff;
3614 new_timeo = min(new_timeo, t);
3617 if (mark_client_expired_locked(clp)) {
3618 dprintk("NFSD: client in use (clientid %08x)\n",
3619 clp->cl_clientid.cl_id);
3622 list_move(&clp->cl_lru, &reaplist);
3624 spin_unlock(&nn->client_lock);
3625 list_for_each_safe(pos, next, &reaplist) {
3626 clp = list_entry(pos, struct nfs4_client, cl_lru);
3627 dprintk("NFSD: purging unused client (clientid %08x)\n",
3628 clp->cl_clientid.cl_id);
3631 spin_lock(&state_lock);
3632 list_for_each_safe(pos, next, &nn->del_recall_lru) {
3633 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3634 if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn)
3636 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
3637 t = dp->dl_time - cutoff;
3638 new_timeo = min(new_timeo, t);
3641 list_move(&dp->dl_recall_lru, &reaplist);
3643 spin_unlock(&state_lock);
3644 list_for_each_safe(pos, next, &reaplist) {
3645 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3646 revoke_delegation(dp);
3648 list_for_each_safe(pos, next, &nn->close_lru) {
3649 oo = container_of(pos, struct nfs4_openowner, oo_close_lru);
3650 if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) {
3651 t = oo->oo_time - cutoff;
3652 new_timeo = min(new_timeo, t);
3655 release_openowner(oo);
3657 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
3658 nfs4_unlock_state();
3662 static struct workqueue_struct *laundry_wq;
3663 static void laundromat_main(struct work_struct *);
3666 laundromat_main(struct work_struct *laundry)
3669 struct delayed_work *dwork = container_of(laundry, struct delayed_work,
3671 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
3674 t = nfs4_laundromat(nn);
3675 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
3676 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
3679 static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp)
3681 if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode)
3682 return nfserr_bad_stateid;
3687 access_permit_read(struct nfs4_ol_stateid *stp)
3689 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
3690 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
3691 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
3695 access_permit_write(struct nfs4_ol_stateid *stp)
3697 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
3698 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
3702 __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
3704 __be32 status = nfserr_openmode;
3706 /* For lock stateid's, we test the parent open, not the lock: */
3707 if (stp->st_openstp)
3708 stp = stp->st_openstp;
3709 if ((flags & WR_STATE) && !access_permit_write(stp))
3711 if ((flags & RD_STATE) && !access_permit_read(stp))
3718 static inline __be32
3719 check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
3721 if (ONE_STATEID(stateid) && (flags & RD_STATE))
3723 else if (locks_in_grace(net)) {
3724 /* Answer in remaining cases depends on existence of
3725 * conflicting state; so we must wait out the grace period. */
3726 return nfserr_grace;
3727 } else if (flags & WR_STATE)
3728 return nfs4_share_conflict(current_fh,
3729 NFS4_SHARE_DENY_WRITE);
3730 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
3731 return nfs4_share_conflict(current_fh,
3732 NFS4_SHARE_DENY_READ);
3736 * Allow READ/WRITE during grace period on recovered state only for files
3737 * that are not able to provide mandatory locking.
3740 grace_disallows_io(struct net *net, struct inode *inode)
3742 return locks_in_grace(net) && mandatory_lock(inode);
3745 /* Returns true iff a is later than b: */
3746 static bool stateid_generation_after(stateid_t *a, stateid_t *b)
3748 return (s32)(a->si_generation - b->si_generation) > 0;
3751 static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
3754 * When sessions are used the stateid generation number is ignored
3757 if (has_session && in->si_generation == 0)
3760 if (in->si_generation == ref->si_generation)
3763 /* If the client sends us a stateid from the future, it's buggy: */
3764 if (stateid_generation_after(in, ref))
3765 return nfserr_bad_stateid;
3767 * However, we could see a stateid from the past, even from a
3768 * non-buggy client. For example, if the client sends a lock
3769 * while some IO is outstanding, the lock may bump si_generation
3770 * while the IO is still in flight. The client could avoid that
3771 * situation by waiting for responses on all the IO requests,
3772 * but better performance may result in retrying IO that
3773 * receives an old_stateid error if requests are rarely
3774 * reordered in flight:
3776 return nfserr_old_stateid;
3779 static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
3781 struct nfs4_stid *s;
3782 struct nfs4_ol_stateid *ols;
3785 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3786 return nfserr_bad_stateid;
3787 /* Client debugging aid. */
3788 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
3789 char addr_str[INET6_ADDRSTRLEN];
3790 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
3792 pr_warn_ratelimited("NFSD: client %s testing state ID "
3793 "with incorrect client ID\n", addr_str);
3794 return nfserr_bad_stateid;
3796 s = find_stateid(cl, stateid);
3798 return nfserr_bad_stateid;
3799 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
3802 switch (s->sc_type) {
3803 case NFS4_DELEG_STID:
3805 case NFS4_REVOKED_DELEG_STID:
3806 return nfserr_deleg_revoked;
3807 case NFS4_OPEN_STID:
3808 case NFS4_LOCK_STID:
3809 ols = openlockstateid(s);
3810 if (ols->st_stateowner->so_is_open_owner
3811 && !(openowner(ols->st_stateowner)->oo_flags
3812 & NFS4_OO_CONFIRMED))
3813 return nfserr_bad_stateid;
3816 printk("unknown stateid type %x\n", s->sc_type);
3817 case NFS4_CLOSED_STID:
3818 return nfserr_bad_stateid;
3823 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
3824 stateid_t *stateid, unsigned char typemask,
3825 struct nfs4_stid **s, struct nfsd_net *nn)
3829 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3830 return nfserr_bad_stateid;
3831 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
3832 if (status == nfserr_stale_clientid) {
3833 if (cstate->session)
3834 return nfserr_bad_stateid;
3835 return nfserr_stale_stateid;
3839 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
3841 return nfserr_bad_stateid;
3846 * Checks for stateid operations
3849 nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
3850 stateid_t *stateid, int flags, struct file **filpp)
3852 struct nfs4_stid *s;
3853 struct nfs4_ol_stateid *stp = NULL;
3854 struct nfs4_delegation *dp = NULL;
3855 struct svc_fh *current_fh = &cstate->current_fh;
3856 struct inode *ino = current_fh->fh_dentry->d_inode;
3857 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3858 struct file *file = NULL;
3864 if (grace_disallows_io(net, ino))
3865 return nfserr_grace;
3867 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
3868 return check_special_stateids(net, current_fh, stateid, flags);
3872 status = nfsd4_lookup_stateid(cstate, stateid,
3873 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
3877 status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
3880 switch (s->sc_type) {
3881 case NFS4_DELEG_STID:
3882 dp = delegstateid(s);
3883 status = nfs4_check_delegmode(dp, flags);
3887 file = dp->dl_file->fi_deleg_file;
3890 status = nfserr_serverfault;
3895 case NFS4_OPEN_STID:
3896 case NFS4_LOCK_STID:
3897 stp = openlockstateid(s);
3898 status = nfs4_check_fh(current_fh, stp);
3901 if (stp->st_stateowner->so_is_open_owner
3902 && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
3904 status = nfs4_check_openmode(stp, flags);
3908 if (flags & RD_STATE)
3909 file = find_readable_file(stp->st_file);
3911 file = find_writeable_file(stp->st_file);
3915 status = nfserr_bad_stateid;
3920 *filpp = get_file(file);
3922 nfs4_unlock_state();
3927 nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp)
3929 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
3931 if (check_for_locks(stp->st_file, lo))
3932 return nfserr_locks_held;
3933 release_lockowner_if_empty(lo);
3938 * Test if the stateid is valid
3941 nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3942 struct nfsd4_test_stateid *test_stateid)
3944 struct nfsd4_test_stateid_id *stateid;
3945 struct nfs4_client *cl = cstate->session->se_client;
3948 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
3949 stateid->ts_id_status =
3950 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
3951 nfs4_unlock_state();
3957 nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3958 struct nfsd4_free_stateid *free_stateid)
3960 stateid_t *stateid = &free_stateid->fr_stateid;
3961 struct nfs4_stid *s;
3962 struct nfs4_delegation *dp;
3963 struct nfs4_client *cl = cstate->session->se_client;
3964 __be32 ret = nfserr_bad_stateid;
3967 s = find_stateid(cl, stateid);
3970 switch (s->sc_type) {
3971 case NFS4_DELEG_STID:
3972 ret = nfserr_locks_held;
3974 case NFS4_OPEN_STID:
3975 case NFS4_LOCK_STID:
3976 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
3979 if (s->sc_type == NFS4_LOCK_STID)
3980 ret = nfsd4_free_lock_stateid(openlockstateid(s));
3982 ret = nfserr_locks_held;
3984 case NFS4_REVOKED_DELEG_STID:
3985 dp = delegstateid(s);
3986 destroy_revoked_delegation(dp);
3990 ret = nfserr_bad_stateid;
3993 nfs4_unlock_state();
4000 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
4001 RD_STATE : WR_STATE;
4004 static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
4006 struct svc_fh *current_fh = &cstate->current_fh;
4007 struct nfs4_stateowner *sop = stp->st_stateowner;
4010 status = nfsd4_check_seqid(cstate, sop, seqid);
4013 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
4014 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
4016 * "Closed" stateid's exist *only* to return
4017 * nfserr_replay_me from the previous step, and
4018 * revoked delegations are kept only for free_stateid.
4020 return nfserr_bad_stateid;
4021 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
4024 return nfs4_check_fh(current_fh, stp);
4028 * Checks for sequence id mutating operations.
4031 nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4032 stateid_t *stateid, char typemask,
4033 struct nfs4_ol_stateid **stpp,
4034 struct nfsd_net *nn)
4037 struct nfs4_stid *s;
4038 struct nfs4_ol_stateid *stp = NULL;
4040 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
4041 seqid, STATEID_VAL(stateid));
4044 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
4047 stp = openlockstateid(s);
4048 if (!nfsd4_has_session(cstate))
4049 cstate->replay_owner = stp->st_stateowner;
4051 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
4057 static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
4058 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
4061 struct nfs4_openowner *oo;
4063 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
4064 NFS4_OPEN_STID, stpp, nn);
4067 oo = openowner((*stpp)->st_stateowner);
4068 if (!(oo->oo_flags & NFS4_OO_CONFIRMED))
4069 return nfserr_bad_stateid;
4074 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4075 struct nfsd4_open_confirm *oc)
4078 struct nfs4_openowner *oo;
4079 struct nfs4_ol_stateid *stp;
4080 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4082 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
4083 cstate->current_fh.fh_dentry);
4085 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
4091 status = nfs4_preprocess_seqid_op(cstate,
4092 oc->oc_seqid, &oc->oc_req_stateid,
4093 NFS4_OPEN_STID, &stp, nn);
4096 oo = openowner(stp->st_stateowner);
4097 status = nfserr_bad_stateid;
4098 if (oo->oo_flags & NFS4_OO_CONFIRMED)
4100 oo->oo_flags |= NFS4_OO_CONFIRMED;
4101 update_stateid(&stp->st_stid.sc_stateid);
4102 memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4103 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
4104 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
4106 nfsd4_client_record_create(oo->oo_owner.so_client);
4109 nfsd4_bump_seqid(cstate, status);
4110 if (!cstate->replay_owner)
4111 nfs4_unlock_state();
4115 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
4117 if (!test_access(access, stp))
4119 nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
4120 clear_access(access, stp);
4123 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
4125 switch (to_access) {
4126 case NFS4_SHARE_ACCESS_READ:
4127 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
4128 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4130 case NFS4_SHARE_ACCESS_WRITE:
4131 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
4132 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
4134 case NFS4_SHARE_ACCESS_BOTH:
4142 reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
4145 for (i = 0; i < 4; i++) {
4146 if ((i & deny) != i)
4152 nfsd4_open_downgrade(struct svc_rqst *rqstp,
4153 struct nfsd4_compound_state *cstate,
4154 struct nfsd4_open_downgrade *od)
4157 struct nfs4_ol_stateid *stp;
4158 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4160 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
4161 cstate->current_fh.fh_dentry);
4163 /* We don't yet support WANT bits: */
4164 if (od->od_deleg_want)
4165 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
4169 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
4170 &od->od_stateid, &stp, nn);
4173 status = nfserr_inval;
4174 if (!test_access(od->od_share_access, stp)) {
4175 dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
4176 stp->st_access_bmap, od->od_share_access);
4179 if (!test_deny(od->od_share_deny, stp)) {
4180 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
4181 stp->st_deny_bmap, od->od_share_deny);
4184 nfs4_stateid_downgrade(stp, od->od_share_access);
4186 reset_union_bmap_deny(od->od_share_deny, stp);
4188 update_stateid(&stp->st_stid.sc_stateid);
4189 memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4192 nfsd4_bump_seqid(cstate, status);
4193 if (!cstate->replay_owner)
4194 nfs4_unlock_state();
4198 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
4200 struct nfs4_client *clp = s->st_stid.sc_client;
4201 struct nfs4_openowner *oo = openowner(s->st_stateowner);
4203 s->st_stid.sc_type = NFS4_CLOSED_STID;
4204 unhash_open_stateid(s);
4206 if (clp->cl_minorversion) {
4207 free_generic_stateid(s);
4208 if (list_empty(&oo->oo_owner.so_stateids))
4209 release_openowner(oo);
4211 oo->oo_last_closed_stid = s;
4213 * In the 4.0 case we need to keep the owners around a
4214 * little while to handle CLOSE replay.
4216 if (list_empty(&oo->oo_owner.so_stateids))
4217 move_to_close_lru(oo, clp->net);
4222 * nfs4_unlock_state() called after encode
4225 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4226 struct nfsd4_close *close)
4229 struct nfs4_ol_stateid *stp;
4230 struct net *net = SVC_NET(rqstp);
4231 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4233 dprintk("NFSD: nfsd4_close on file %pd\n",
4234 cstate->current_fh.fh_dentry);
4237 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
4239 NFS4_OPEN_STID|NFS4_CLOSED_STID,
4241 nfsd4_bump_seqid(cstate, status);
4244 update_stateid(&stp->st_stid.sc_stateid);
4245 memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4247 nfsd4_close_open_stateid(stp);
4249 if (!cstate->replay_owner)
4250 nfs4_unlock_state();
4255 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4256 struct nfsd4_delegreturn *dr)
4258 struct nfs4_delegation *dp;
4259 stateid_t *stateid = &dr->dr_stateid;
4260 struct nfs4_stid *s;
4262 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4264 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4268 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
4271 dp = delegstateid(s);
4272 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
4276 destroy_delegation(dp);
4278 nfs4_unlock_state();
4284 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
4287 end_offset(u64 start, u64 len)
4292 return end >= start ? end: NFS4_MAX_UINT64;
4295 /* last octet in a range */
4297 last_byte_offset(u64 start, u64 len)
4303 return end > start ? end - 1: NFS4_MAX_UINT64;
4307 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
4308 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
4309 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
4310 * locking, this prevents us from being completely protocol-compliant. The
4311 * real solution to this problem is to start using unsigned file offsets in
4312 * the VFS, but this is a very deep change!
4315 nfs4_transform_lock_offset(struct file_lock *lock)
4317 if (lock->fl_start < 0)
4318 lock->fl_start = OFFSET_MAX;
4319 if (lock->fl_end < 0)
4320 lock->fl_end = OFFSET_MAX;
4323 /* Hack!: For now, we're defining this just so we can use a pointer to it
4324 * as a unique cookie to identify our (NFSv4's) posix locks. */
4325 static const struct lock_manager_operations nfsd_posix_mng_ops = {
4329 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
4331 struct nfs4_lockowner *lo;
4333 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
4334 lo = (struct nfs4_lockowner *) fl->fl_owner;
4335 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
4336 lo->lo_owner.so_owner.len, GFP_KERNEL);
4337 if (!deny->ld_owner.data)
4338 /* We just don't care that much */
4340 deny->ld_owner.len = lo->lo_owner.so_owner.len;
4341 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
4344 deny->ld_owner.len = 0;
4345 deny->ld_owner.data = NULL;
4346 deny->ld_clientid.cl_boot = 0;
4347 deny->ld_clientid.cl_id = 0;
4349 deny->ld_start = fl->fl_start;
4350 deny->ld_length = NFS4_MAX_UINT64;
4351 if (fl->fl_end != NFS4_MAX_UINT64)
4352 deny->ld_length = fl->fl_end - fl->fl_start + 1;
4353 deny->ld_type = NFS4_READ_LT;
4354 if (fl->fl_type != F_RDLCK)
4355 deny->ld_type = NFS4_WRITE_LT;
4358 static struct nfs4_lockowner *
4359 find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
4360 struct nfsd_net *nn)
4362 unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner);
4363 struct nfs4_stateowner *so;
4365 list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) {
4366 if (so->so_is_open_owner)
4368 if (!same_owner_str(so, owner, clid))
4370 return lockowner(so);
4376 * Alloc a lock owner structure.
4377 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
4380 * strhashval = ownerstr_hashval
4382 static struct nfs4_lockowner *
4383 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) {
4384 struct nfs4_lockowner *lo;
4385 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
4387 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
4390 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
4391 lo->lo_owner.so_is_open_owner = 0;
4392 /* It is the openowner seqid that will be incremented in encode in the
4393 * case of new lockowners; so increment the lock seqid manually: */
4394 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1;
4395 list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
4399 static struct nfs4_ol_stateid *
4400 alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp)
4402 struct nfs4_ol_stateid *stp;
4403 struct nfs4_client *clp = lo->lo_owner.so_client;
4405 stp = nfs4_alloc_stateid(clp);
4408 stp->st_stid.sc_type = NFS4_LOCK_STID;
4409 list_add(&stp->st_perfile, &fp->fi_stateids);
4410 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
4411 stp->st_stateowner = &lo->lo_owner;
4414 stp->st_access_bmap = 0;
4415 stp->st_deny_bmap = open_stp->st_deny_bmap;
4416 stp->st_openstp = open_stp;
4417 list_add(&stp->st_locks, &open_stp->st_locks);
4421 static struct nfs4_ol_stateid *
4422 find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
4424 struct nfs4_ol_stateid *lst;
4426 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
4427 if (lst->st_file == fp)
4435 check_lock_length(u64 offset, u64 length)
4437 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
4438 LOFF_OVERFLOW(offset, length)));
4441 static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
4443 struct nfs4_file *fp = lock_stp->st_file;
4444 int oflag = nfs4_access_to_omode(access);
4446 if (test_access(access, lock_stp))
4448 nfs4_file_get_access(fp, oflag);
4449 set_access(access, lock_stp);
4452 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)
4454 struct nfs4_file *fi = ost->st_file;
4455 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
4456 struct nfs4_client *cl = oo->oo_owner.so_client;
4457 struct nfs4_lockowner *lo;
4458 unsigned int strhashval;
4459 struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id);
4461 lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn);
4463 strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,
4464 &lock->v.new.owner);
4465 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
4467 return nfserr_jukebox;
4469 /* with an existing lockowner, seqids must be the same */
4470 if (!cstate->minorversion &&
4471 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
4472 return nfserr_bad_seqid;
4475 *lst = find_lock_stateid(lo, fi);
4477 *lst = alloc_init_lock_stateid(lo, fi, ost);
4479 release_lockowner_if_empty(lo);
4480 return nfserr_jukebox;
4491 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4492 struct nfsd4_lock *lock)
4494 struct nfs4_openowner *open_sop = NULL;
4495 struct nfs4_lockowner *lock_sop = NULL;
4496 struct nfs4_ol_stateid *lock_stp;
4497 struct file *filp = NULL;
4498 struct file_lock *file_lock = NULL;
4499 struct file_lock *conflock = NULL;
4501 bool new_state = false;
4504 struct net *net = SVC_NET(rqstp);
4505 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4507 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
4508 (long long) lock->lk_offset,
4509 (long long) lock->lk_length);
4511 if (check_lock_length(lock->lk_offset, lock->lk_length))
4512 return nfserr_inval;
4514 if ((status = fh_verify(rqstp, &cstate->current_fh,
4515 S_IFREG, NFSD_MAY_LOCK))) {
4516 dprintk("NFSD: nfsd4_lock: permission denied!\n");
4522 if (lock->lk_is_new) {
4523 struct nfs4_ol_stateid *open_stp = NULL;
4525 if (nfsd4_has_session(cstate))
4526 /* See rfc 5661 18.10.3: given clientid is ignored: */
4527 memcpy(&lock->v.new.clientid,
4528 &cstate->session->se_client->cl_clientid,
4529 sizeof(clientid_t));
4531 status = nfserr_stale_clientid;
4532 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
4535 /* validate and update open stateid and open seqid */
4536 status = nfs4_preprocess_confirmed_seqid_op(cstate,
4537 lock->lk_new_open_seqid,
4538 &lock->lk_new_open_stateid,
4542 open_sop = openowner(open_stp->st_stateowner);
4543 status = nfserr_bad_stateid;
4544 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
4545 &lock->v.new.clientid))
4547 status = lookup_or_create_lock_state(cstate, open_stp, lock,
4548 &lock_stp, &new_state);
4550 status = nfs4_preprocess_seqid_op(cstate,
4551 lock->lk_old_lock_seqid,
4552 &lock->lk_old_lock_stateid,
4553 NFS4_LOCK_STID, &lock_stp, nn);
4556 lock_sop = lockowner(lock_stp->st_stateowner);
4558 lkflg = setlkflg(lock->lk_type);
4559 status = nfs4_check_openmode(lock_stp, lkflg);
4563 status = nfserr_grace;
4564 if (locks_in_grace(net) && !lock->lk_reclaim)
4566 status = nfserr_no_grace;
4567 if (!locks_in_grace(net) && lock->lk_reclaim)
4570 file_lock = locks_alloc_lock();
4572 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4573 status = nfserr_jukebox;
4577 locks_init_lock(file_lock);
4578 switch (lock->lk_type) {
4581 filp = find_readable_file(lock_stp->st_file);
4583 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
4584 file_lock->fl_type = F_RDLCK;
4587 case NFS4_WRITEW_LT:
4588 filp = find_writeable_file(lock_stp->st_file);
4590 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
4591 file_lock->fl_type = F_WRLCK;
4594 status = nfserr_inval;
4598 status = nfserr_openmode;
4601 file_lock->fl_owner = (fl_owner_t)lock_sop;
4602 file_lock->fl_pid = current->tgid;
4603 file_lock->fl_file = filp;
4604 file_lock->fl_flags = FL_POSIX;
4605 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4606 file_lock->fl_start = lock->lk_offset;
4607 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
4608 nfs4_transform_lock_offset(file_lock);
4610 conflock = locks_alloc_lock();
4612 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4613 status = nfserr_jukebox;
4617 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
4619 case 0: /* success! */
4620 update_stateid(&lock_stp->st_stid.sc_stateid);
4621 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid,
4625 case (EAGAIN): /* conflock holds conflicting lock */
4626 status = nfserr_denied;
4627 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
4628 nfs4_set_lock_denied(conflock, &lock->lk_denied);
4631 status = nfserr_deadlock;
4634 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
4635 status = nfserrno(err);
4639 if (status && new_state)
4640 release_lock_stateid(lock_stp);
4641 nfsd4_bump_seqid(cstate, status);
4642 if (!cstate->replay_owner)
4643 nfs4_unlock_state();
4645 locks_free_lock(file_lock);
4647 locks_free_lock(conflock);
4652 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
4653 * so we do a temporary open here just to get an open file to pass to
4654 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
4657 static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
4660 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
4662 err = nfserrno(vfs_test_lock(file, lock));
4672 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4673 struct nfsd4_lockt *lockt)
4675 struct file_lock *file_lock = NULL;
4676 struct nfs4_lockowner *lo;
4678 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4680 if (locks_in_grace(SVC_NET(rqstp)))
4681 return nfserr_grace;
4683 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
4684 return nfserr_inval;
4688 if (!nfsd4_has_session(cstate)) {
4689 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
4694 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
4697 file_lock = locks_alloc_lock();
4699 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4700 status = nfserr_jukebox;
4703 locks_init_lock(file_lock);
4704 switch (lockt->lt_type) {
4707 file_lock->fl_type = F_RDLCK;
4710 case NFS4_WRITEW_LT:
4711 file_lock->fl_type = F_WRLCK;
4714 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
4715 status = nfserr_inval;
4719 lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn);
4721 file_lock->fl_owner = (fl_owner_t)lo;
4722 file_lock->fl_pid = current->tgid;
4723 file_lock->fl_flags = FL_POSIX;
4725 file_lock->fl_start = lockt->lt_offset;
4726 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
4728 nfs4_transform_lock_offset(file_lock);
4730 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
4734 if (file_lock->fl_type != F_UNLCK) {
4735 status = nfserr_denied;
4736 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
4739 nfs4_unlock_state();
4741 locks_free_lock(file_lock);
4746 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4747 struct nfsd4_locku *locku)
4749 struct nfs4_ol_stateid *stp;
4750 struct file *filp = NULL;
4751 struct file_lock *file_lock = NULL;
4754 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4756 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
4757 (long long) locku->lu_offset,
4758 (long long) locku->lu_length);
4760 if (check_lock_length(locku->lu_offset, locku->lu_length))
4761 return nfserr_inval;
4765 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
4766 &locku->lu_stateid, NFS4_LOCK_STID,
4770 filp = find_any_file(stp->st_file);
4772 status = nfserr_lock_range;
4775 file_lock = locks_alloc_lock();
4777 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
4778 status = nfserr_jukebox;
4781 locks_init_lock(file_lock);
4782 file_lock->fl_type = F_UNLCK;
4783 file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner);
4784 file_lock->fl_pid = current->tgid;
4785 file_lock->fl_file = filp;
4786 file_lock->fl_flags = FL_POSIX;
4787 file_lock->fl_lmops = &nfsd_posix_mng_ops;
4788 file_lock->fl_start = locku->lu_offset;
4790 file_lock->fl_end = last_byte_offset(locku->lu_offset,
4792 nfs4_transform_lock_offset(file_lock);
4794 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
4796 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
4799 update_stateid(&stp->st_stid.sc_stateid);
4800 memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
4803 nfsd4_bump_seqid(cstate, status);
4804 if (!cstate->replay_owner)
4805 nfs4_unlock_state();
4807 locks_free_lock(file_lock);
4811 status = nfserrno(err);
4817 * 1: locks held by lockowner
4818 * 0: no locks held by lockowner
4821 check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner)
4823 struct file_lock **flpp;
4824 struct inode *inode = filp->fi_inode;
4827 spin_lock(&inode->i_lock);
4828 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
4829 if ((*flpp)->fl_owner == (fl_owner_t)lowner) {
4835 spin_unlock(&inode->i_lock);
4840 nfsd4_release_lockowner(struct svc_rqst *rqstp,
4841 struct nfsd4_compound_state *cstate,
4842 struct nfsd4_release_lockowner *rlockowner)
4844 clientid_t *clid = &rlockowner->rl_clientid;
4845 struct nfs4_stateowner *sop = NULL, *tmp;
4846 struct nfs4_lockowner *lo;
4847 struct nfs4_ol_stateid *stp;
4848 struct xdr_netobj *owner = &rlockowner->rl_owner;
4849 unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);
4851 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4853 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
4854 clid->cl_boot, clid->cl_id);
4858 status = lookup_clientid(clid, cstate, nn);
4862 status = nfserr_locks_held;
4864 /* Find the matching lock stateowner */
4865 list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) {
4866 if (tmp->so_is_open_owner)
4868 if (same_owner_str(tmp, owner, clid)) {
4874 /* No matching owner found, maybe a replay? Just declare victory... */
4880 lo = lockowner(sop);
4881 /* see if there are still any locks associated with it */
4882 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
4883 if (check_for_locks(stp->st_file, lo))
4888 release_lockowner(lo);
4890 nfs4_unlock_state();
4894 static inline struct nfs4_client_reclaim *
4897 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
4901 nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
4903 struct nfs4_client_reclaim *crp;
4905 crp = nfsd4_find_reclaim_client(name, nn);
4906 return (crp && crp->cr_clp);
4910 * failure => all reset bets are off, nfserr_no_grace...
4912 struct nfs4_client_reclaim *
4913 nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
4915 unsigned int strhashval;
4916 struct nfs4_client_reclaim *crp;
4918 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
4919 crp = alloc_reclaim();
4921 strhashval = clientstr_hashval(name);
4922 INIT_LIST_HEAD(&crp->cr_strhash);
4923 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
4924 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
4926 nn->reclaim_str_hashtbl_size++;
4932 nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
4934 list_del(&crp->cr_strhash);
4936 nn->reclaim_str_hashtbl_size--;
4940 nfs4_release_reclaim(struct nfsd_net *nn)
4942 struct nfs4_client_reclaim *crp = NULL;
4945 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
4946 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
4947 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
4948 struct nfs4_client_reclaim, cr_strhash);
4949 nfs4_remove_reclaim_record(crp, nn);
4952 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
4956 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
4957 struct nfs4_client_reclaim *
4958 nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
4960 unsigned int strhashval;
4961 struct nfs4_client_reclaim *crp = NULL;
4963 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
4965 strhashval = clientstr_hashval(recdir);
4966 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
4967 if (same_name(crp->cr_recdir, recdir)) {
4975 * Called from OPEN. Look for clientid in reclaim list.
4978 nfs4_check_open_reclaim(clientid_t *clid,
4979 struct nfsd4_compound_state *cstate,
4980 struct nfsd_net *nn)
4984 /* find clientid in conf_id_hashtbl */
4985 status = lookup_clientid(clid, cstate, nn);
4987 return nfserr_reclaim_bad;
4989 if (nfsd4_client_record_check(cstate->clp))
4990 return nfserr_reclaim_bad;
4995 #ifdef CONFIG_NFSD_FAULT_INJECTION
4997 u64 nfsd_forget_client(struct nfs4_client *clp, u64 max)
4999 if (mark_client_expired(clp))
5005 u64 nfsd_print_client(struct nfs4_client *clp, u64 num)
5007 char buf[INET6_ADDRSTRLEN];
5008 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5009 printk(KERN_INFO "NFS Client: %s\n", buf);
5013 static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
5016 char buf[INET6_ADDRSTRLEN];
5017 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
5018 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
5021 static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
5022 void (*func)(struct nfs4_ol_stateid *))
5024 struct nfs4_openowner *oop;
5025 struct nfs4_ol_stateid *stp, *st_next;
5026 struct nfs4_ol_stateid *lst, *lst_next;
5029 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
5030 list_for_each_entry_safe(stp, st_next,
5031 &oop->oo_owner.so_stateids, st_perstateowner) {
5032 list_for_each_entry_safe(lst, lst_next,
5033 &stp->st_locks, st_locks) {
5045 u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
5047 return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
5050 u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
5052 u64 count = nfsd_foreach_client_lock(clp, max, NULL);
5053 nfsd_print_count(clp, count, "locked files");
5057 static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *))
5059 struct nfs4_openowner *oop, *next;
5062 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
5072 u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max)
5074 return nfsd_foreach_client_open(clp, max, release_openowner);
5077 u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max)
5079 u64 count = nfsd_foreach_client_open(clp, max, NULL);
5080 nfsd_print_count(clp, count, "open files");
5084 static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
5085 struct list_head *victims)
5087 struct nfs4_delegation *dp, *next;
5090 lockdep_assert_held(&state_lock);
5091 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
5094 * It's not safe to mess with delegations that have a
5095 * non-zero dl_time. They might have already been broken
5096 * and could be processed by the laundromat outside of
5097 * the state_lock. Just leave them be.
5099 if (dp->dl_time != 0)
5103 * Increment dl_time to ensure that delegation breaks
5104 * don't monkey with it now that we are.
5107 list_move(&dp->dl_recall_lru, victims);
5115 u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max)
5117 struct nfs4_delegation *dp, *next;
5121 spin_lock(&state_lock);
5122 count = nfsd_find_all_delegations(clp, max, &victims);
5123 spin_unlock(&state_lock);
5125 list_for_each_entry_safe(dp, next, &victims, dl_recall_lru)
5126 revoke_delegation(dp);
5131 u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max)
5133 struct nfs4_delegation *dp;
5137 spin_lock(&state_lock);
5138 count = nfsd_find_all_delegations(clp, max, &victims);
5139 while (!list_empty(&victims)) {
5140 dp = list_first_entry(&victims, struct nfs4_delegation,
5142 list_del_init(&dp->dl_recall_lru);
5144 nfsd_break_one_deleg(dp);
5146 spin_unlock(&state_lock);
5151 u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max)
5155 spin_lock(&state_lock);
5156 count = nfsd_find_all_delegations(clp, max, NULL);
5157 spin_unlock(&state_lock);
5159 nfsd_print_count(clp, count, "delegations");
5163 u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64))
5165 struct nfs4_client *clp, *next;
5167 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5169 if (!nfsd_netns_ready(nn))
5172 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
5173 count += func(clp, max - count);
5174 if ((max != 0) && (count >= max))
5181 struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
5183 struct nfs4_client *clp;
5184 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id);
5186 if (!nfsd_netns_ready(nn))
5189 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
5190 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
5196 #endif /* CONFIG_NFSD_FAULT_INJECTION */
5199 * Since the lifetime of a delegation isn't limited to that of an open, a
5200 * client may quite reasonably hang on to a delegation as long as it has
5201 * the inode cached. This becomes an obvious problem the first time a
5202 * client's inode cache approaches the size of the server's total memory.
5204 * For now we avoid this problem by imposing a hard limit on the number
5205 * of delegations, which varies according to the server's memory size.
5208 set_max_delegations(void)
5211 * Allow at most 4 delegations per megabyte of RAM. Quick
5212 * estimates suggest that in the worst case (where every delegation
5213 * is for a different inode), a delegation could take about 1.5K,
5214 * giving a worst case usage of about 6% of memory.
5216 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
5219 static int nfs4_state_create_net(struct net *net)
5221 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5224 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5225 CLIENT_HASH_SIZE, GFP_KERNEL);
5226 if (!nn->conf_id_hashtbl)
5228 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
5229 CLIENT_HASH_SIZE, GFP_KERNEL);
5230 if (!nn->unconf_id_hashtbl)
5232 nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
5233 OWNER_HASH_SIZE, GFP_KERNEL);
5234 if (!nn->ownerstr_hashtbl)
5236 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
5237 SESSION_HASH_SIZE, GFP_KERNEL);
5238 if (!nn->sessionid_hashtbl)
5241 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5242 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
5243 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
5245 for (i = 0; i < OWNER_HASH_SIZE; i++)
5246 INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]);
5247 for (i = 0; i < SESSION_HASH_SIZE; i++)
5248 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
5249 nn->conf_name_tree = RB_ROOT;
5250 nn->unconf_name_tree = RB_ROOT;
5251 INIT_LIST_HEAD(&nn->client_lru);
5252 INIT_LIST_HEAD(&nn->close_lru);
5253 INIT_LIST_HEAD(&nn->del_recall_lru);
5254 spin_lock_init(&nn->client_lock);
5256 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
5262 kfree(nn->ownerstr_hashtbl);
5264 kfree(nn->unconf_id_hashtbl);
5266 kfree(nn->conf_id_hashtbl);
5272 nfs4_state_destroy_net(struct net *net)
5275 struct nfs4_client *clp = NULL;
5276 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5278 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5279 while (!list_empty(&nn->conf_id_hashtbl[i])) {
5280 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5281 destroy_client(clp);
5285 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
5286 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
5287 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
5288 destroy_client(clp);
5292 kfree(nn->sessionid_hashtbl);
5293 kfree(nn->ownerstr_hashtbl);
5294 kfree(nn->unconf_id_hashtbl);
5295 kfree(nn->conf_id_hashtbl);
5300 nfs4_state_start_net(struct net *net)
5302 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5305 ret = nfs4_state_create_net(net);
5308 nfsd4_client_tracking_init(net);
5309 nn->boot_time = get_seconds();
5310 locks_start_grace(net, &nn->nfsd4_manager);
5311 nn->grace_ended = false;
5312 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
5313 nn->nfsd4_grace, net);
5314 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
5318 /* initialization to perform when the nfsd service is started: */
5321 nfs4_state_start(void)
5325 ret = set_callback_cred();
5328 laundry_wq = create_singlethread_workqueue("nfsd4");
5329 if (laundry_wq == NULL) {
5333 ret = nfsd4_create_callback_queue();
5335 goto out_free_laundry;
5337 set_max_delegations();
5342 destroy_workqueue(laundry_wq);
5348 nfs4_state_shutdown_net(struct net *net)
5350 struct nfs4_delegation *dp = NULL;
5351 struct list_head *pos, *next, reaplist;
5352 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5354 cancel_delayed_work_sync(&nn->laundromat_work);
5355 locks_end_grace(&nn->nfsd4_manager);
5358 INIT_LIST_HEAD(&reaplist);
5359 spin_lock(&state_lock);
5360 list_for_each_safe(pos, next, &nn->del_recall_lru) {
5361 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5362 list_move(&dp->dl_recall_lru, &reaplist);
5364 spin_unlock(&state_lock);
5365 list_for_each_safe(pos, next, &reaplist) {
5366 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
5367 destroy_delegation(dp);
5370 nfsd4_client_tracking_exit(net);
5371 nfs4_state_destroy_net(net);
5372 nfs4_unlock_state();
5376 nfs4_state_shutdown(void)
5378 destroy_workqueue(laundry_wq);
5379 nfsd4_destroy_callback_queue();
5383 get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5385 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
5386 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
5390 put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
5392 if (cstate->minorversion) {
5393 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
5394 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5399 clear_current_stateid(struct nfsd4_compound_state *cstate)
5401 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
5405 * functions to set current state id
5408 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5410 put_stateid(cstate, &odp->od_stateid);
5414 nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
5416 put_stateid(cstate, &open->op_stateid);
5420 nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5422 put_stateid(cstate, &close->cl_stateid);
5426 nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
5428 put_stateid(cstate, &lock->lk_resp_stateid);
5432 * functions to consume current state id
5436 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
5438 get_stateid(cstate, &odp->od_stateid);
5442 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
5444 get_stateid(cstate, &drp->dr_stateid);
5448 nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
5450 get_stateid(cstate, &fsp->fr_stateid);
5454 nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
5456 get_stateid(cstate, &setattr->sa_stateid);
5460 nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
5462 get_stateid(cstate, &close->cl_stateid);
5466 nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
5468 get_stateid(cstate, &locku->lu_stateid);
5472 nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
5474 get_stateid(cstate, &read->rd_stateid);
5478 nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
5480 get_stateid(cstate, &write->wr_stateid);