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/jhash.h>
48 #include "current_stateid.h"
53 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 #define all_ones {{~0,~0},~0}
56 static const stateid_t one_stateid = {
58 .si_opaque = all_ones,
60 static const stateid_t zero_stateid = {
63 static const stateid_t currentstateid = {
67 static u64 current_sessionid = 1;
69 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t)))
70 #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t)))
71 #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t)))
73 /* forward declarations */
74 static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
75 static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
80 * Currently used for the del_recall_lru and file hash table. In an
81 * effort to decrease the scope of the client_mutex, this spinlock may
82 * eventually cover more:
84 static DEFINE_SPINLOCK(state_lock);
87 * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for
88 * the refcount on the open stateid to drop.
90 static DECLARE_WAIT_QUEUE_HEAD(close_wq);
92 static struct kmem_cache *openowner_slab;
93 static struct kmem_cache *lockowner_slab;
94 static struct kmem_cache *file_slab;
95 static struct kmem_cache *stateid_slab;
96 static struct kmem_cache *deleg_slab;
97 static struct kmem_cache *odstate_slab;
99 static void free_session(struct nfsd4_session *);
101 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
102 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
104 static bool is_session_dead(struct nfsd4_session *ses)
106 return ses->se_flags & NFS4_SESSION_DEAD;
109 static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me)
111 if (atomic_read(&ses->se_ref) > ref_held_by_me)
112 return nfserr_jukebox;
113 ses->se_flags |= NFS4_SESSION_DEAD;
117 static bool is_client_expired(struct nfs4_client *clp)
119 return clp->cl_time == 0;
122 static __be32 get_client_locked(struct nfs4_client *clp)
124 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
126 lockdep_assert_held(&nn->client_lock);
128 if (is_client_expired(clp))
129 return nfserr_expired;
130 atomic_inc(&clp->cl_refcount);
134 /* must be called under the client_lock */
136 renew_client_locked(struct nfs4_client *clp)
138 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
140 if (is_client_expired(clp)) {
142 printk("%s: client (clientid %08x/%08x) already expired\n",
144 clp->cl_clientid.cl_boot,
145 clp->cl_clientid.cl_id);
149 dprintk("renewing client (clientid %08x/%08x)\n",
150 clp->cl_clientid.cl_boot,
151 clp->cl_clientid.cl_id);
152 list_move_tail(&clp->cl_lru, &nn->client_lru);
153 clp->cl_time = get_seconds();
156 static void put_client_renew_locked(struct nfs4_client *clp)
158 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
160 lockdep_assert_held(&nn->client_lock);
162 if (!atomic_dec_and_test(&clp->cl_refcount))
164 if (!is_client_expired(clp))
165 renew_client_locked(clp);
168 static void put_client_renew(struct nfs4_client *clp)
170 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
172 if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
174 if (!is_client_expired(clp))
175 renew_client_locked(clp);
176 spin_unlock(&nn->client_lock);
179 static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses)
183 if (is_session_dead(ses))
184 return nfserr_badsession;
185 status = get_client_locked(ses->se_client);
188 atomic_inc(&ses->se_ref);
192 static void nfsd4_put_session_locked(struct nfsd4_session *ses)
194 struct nfs4_client *clp = ses->se_client;
195 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
197 lockdep_assert_held(&nn->client_lock);
199 if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses))
201 put_client_renew_locked(clp);
204 static void nfsd4_put_session(struct nfsd4_session *ses)
206 struct nfs4_client *clp = ses->se_client;
207 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
209 spin_lock(&nn->client_lock);
210 nfsd4_put_session_locked(ses);
211 spin_unlock(&nn->client_lock);
214 static struct nfsd4_blocked_lock *
215 find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
218 struct nfsd4_blocked_lock *cur, *found = NULL;
220 spin_lock(&nn->client_lock);
221 list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
222 if (fh_match(fh, &cur->nbl_fh)) {
223 list_del_init(&cur->nbl_list);
224 list_del_init(&cur->nbl_lru);
229 spin_unlock(&nn->client_lock);
231 posix_unblock_lock(&found->nbl_lock);
235 static struct nfsd4_blocked_lock *
236 find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
239 struct nfsd4_blocked_lock *nbl;
241 nbl = find_blocked_lock(lo, fh, nn);
243 nbl= kmalloc(sizeof(*nbl), GFP_KERNEL);
245 fh_copy_shallow(&nbl->nbl_fh, fh);
246 locks_init_lock(&nbl->nbl_lock);
247 nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,
248 &nfsd4_cb_notify_lock_ops,
249 NFSPROC4_CLNT_CB_NOTIFY_LOCK);
256 free_blocked_lock(struct nfsd4_blocked_lock *nbl)
258 locks_release_private(&nbl->nbl_lock);
263 nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
266 * Since this is just an optimization, we don't try very hard if it
267 * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and
268 * just quit trying on anything else.
270 switch (task->tk_status) {
272 rpc_delay(task, 1 * HZ);
280 nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb)
282 struct nfsd4_blocked_lock *nbl = container_of(cb,
283 struct nfsd4_blocked_lock, nbl_cb);
285 free_blocked_lock(nbl);
288 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
289 .done = nfsd4_cb_notify_lock_done,
290 .release = nfsd4_cb_notify_lock_release,
293 static inline struct nfs4_stateowner *
294 nfs4_get_stateowner(struct nfs4_stateowner *sop)
296 atomic_inc(&sop->so_count);
301 same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner)
303 return (sop->so_owner.len == owner->len) &&
304 0 == memcmp(sop->so_owner.data, owner->data, owner->len);
307 static struct nfs4_openowner *
308 find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open,
309 struct nfs4_client *clp)
311 struct nfs4_stateowner *so;
313 lockdep_assert_held(&clp->cl_lock);
315 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval],
317 if (!so->so_is_open_owner)
319 if (same_owner_str(so, &open->op_owner))
320 return openowner(nfs4_get_stateowner(so));
325 static struct nfs4_openowner *
326 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open,
327 struct nfs4_client *clp)
329 struct nfs4_openowner *oo;
331 spin_lock(&clp->cl_lock);
332 oo = find_openstateowner_str_locked(hashval, open, clp);
333 spin_unlock(&clp->cl_lock);
338 opaque_hashval(const void *ptr, int nbytes)
340 unsigned char *cptr = (unsigned char *) ptr;
350 static void nfsd4_free_file_rcu(struct rcu_head *rcu)
352 struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
354 kmem_cache_free(file_slab, fp);
358 put_nfs4_file(struct nfs4_file *fi)
360 might_lock(&state_lock);
362 if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
363 hlist_del_rcu(&fi->fi_hash);
364 spin_unlock(&state_lock);
365 WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
366 WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
367 call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
372 __nfs4_get_fd(struct nfs4_file *f, int oflag)
374 if (f->fi_fds[oflag])
375 return get_file(f->fi_fds[oflag]);
380 find_writeable_file_locked(struct nfs4_file *f)
384 lockdep_assert_held(&f->fi_lock);
386 ret = __nfs4_get_fd(f, O_WRONLY);
388 ret = __nfs4_get_fd(f, O_RDWR);
393 find_writeable_file(struct nfs4_file *f)
397 spin_lock(&f->fi_lock);
398 ret = find_writeable_file_locked(f);
399 spin_unlock(&f->fi_lock);
404 static struct file *find_readable_file_locked(struct nfs4_file *f)
408 lockdep_assert_held(&f->fi_lock);
410 ret = __nfs4_get_fd(f, O_RDONLY);
412 ret = __nfs4_get_fd(f, O_RDWR);
417 find_readable_file(struct nfs4_file *f)
421 spin_lock(&f->fi_lock);
422 ret = find_readable_file_locked(f);
423 spin_unlock(&f->fi_lock);
429 find_any_file(struct nfs4_file *f)
433 spin_lock(&f->fi_lock);
434 ret = __nfs4_get_fd(f, O_RDWR);
436 ret = __nfs4_get_fd(f, O_WRONLY);
438 ret = __nfs4_get_fd(f, O_RDONLY);
440 spin_unlock(&f->fi_lock);
444 static atomic_long_t num_delegations;
445 unsigned long max_delegations;
448 * Open owner state (share locks)
451 /* hash tables for lock and open owners */
452 #define OWNER_HASH_BITS 8
453 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
454 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
456 static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
460 ret = opaque_hashval(ownername->data, ownername->len);
461 return ret & OWNER_HASH_MASK;
464 /* hash table for nfs4_file */
465 #define FILE_HASH_BITS 8
466 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
468 static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
470 return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
473 static unsigned int file_hashval(struct knfsd_fh *fh)
475 return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
478 static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
481 __nfs4_file_get_access(struct nfs4_file *fp, u32 access)
483 lockdep_assert_held(&fp->fi_lock);
485 if (access & NFS4_SHARE_ACCESS_WRITE)
486 atomic_inc(&fp->fi_access[O_WRONLY]);
487 if (access & NFS4_SHARE_ACCESS_READ)
488 atomic_inc(&fp->fi_access[O_RDONLY]);
492 nfs4_file_get_access(struct nfs4_file *fp, u32 access)
494 lockdep_assert_held(&fp->fi_lock);
496 /* Does this access mode make sense? */
497 if (access & ~NFS4_SHARE_ACCESS_BOTH)
500 /* Does it conflict with a deny mode already set? */
501 if ((access & fp->fi_share_deny) != 0)
502 return nfserr_share_denied;
504 __nfs4_file_get_access(fp, access);
508 static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny)
510 /* Common case is that there is no deny mode. */
512 /* Does this deny mode make sense? */
513 if (deny & ~NFS4_SHARE_DENY_BOTH)
516 if ((deny & NFS4_SHARE_DENY_READ) &&
517 atomic_read(&fp->fi_access[O_RDONLY]))
518 return nfserr_share_denied;
520 if ((deny & NFS4_SHARE_DENY_WRITE) &&
521 atomic_read(&fp->fi_access[O_WRONLY]))
522 return nfserr_share_denied;
527 static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag)
529 might_lock(&fp->fi_lock);
531 if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) {
532 struct file *f1 = NULL;
533 struct file *f2 = NULL;
535 swap(f1, fp->fi_fds[oflag]);
536 if (atomic_read(&fp->fi_access[1 - oflag]) == 0)
537 swap(f2, fp->fi_fds[O_RDWR]);
538 spin_unlock(&fp->fi_lock);
546 static void nfs4_file_put_access(struct nfs4_file *fp, u32 access)
548 WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH);
550 if (access & NFS4_SHARE_ACCESS_WRITE)
551 __nfs4_file_put_access(fp, O_WRONLY);
552 if (access & NFS4_SHARE_ACCESS_READ)
553 __nfs4_file_put_access(fp, O_RDONLY);
557 * Allocate a new open/delegation state counter. This is needed for
558 * pNFS for proper return on close semantics.
560 * Note that we only allocate it for pNFS-enabled exports, otherwise
561 * all pointers to struct nfs4_clnt_odstate are always NULL.
563 static struct nfs4_clnt_odstate *
564 alloc_clnt_odstate(struct nfs4_client *clp)
566 struct nfs4_clnt_odstate *co;
568 co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL);
571 atomic_set(&co->co_odcount, 1);
577 hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co)
579 struct nfs4_file *fp = co->co_file;
581 lockdep_assert_held(&fp->fi_lock);
582 list_add(&co->co_perfile, &fp->fi_clnt_odstate);
586 get_clnt_odstate(struct nfs4_clnt_odstate *co)
589 atomic_inc(&co->co_odcount);
593 put_clnt_odstate(struct nfs4_clnt_odstate *co)
595 struct nfs4_file *fp;
601 if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) {
602 list_del(&co->co_perfile);
603 spin_unlock(&fp->fi_lock);
605 nfsd4_return_all_file_layouts(co->co_client, fp);
606 kmem_cache_free(odstate_slab, co);
610 static struct nfs4_clnt_odstate *
611 find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new)
613 struct nfs4_clnt_odstate *co;
614 struct nfs4_client *cl;
621 spin_lock(&fp->fi_lock);
622 list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) {
623 if (co->co_client == cl) {
624 get_clnt_odstate(co);
630 hash_clnt_odstate_locked(new);
632 spin_unlock(&fp->fi_lock);
636 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl,
637 struct kmem_cache *slab)
639 struct nfs4_stid *stid;
642 stid = kmem_cache_zalloc(slab, GFP_KERNEL);
646 idr_preload(GFP_KERNEL);
647 spin_lock(&cl->cl_lock);
648 new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
649 spin_unlock(&cl->cl_lock);
653 stid->sc_client = cl;
654 stid->sc_stateid.si_opaque.so_id = new_id;
655 stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid;
656 /* Will be incremented before return to client: */
657 atomic_set(&stid->sc_count, 1);
658 spin_lock_init(&stid->sc_lock);
661 * It shouldn't be a problem to reuse an opaque stateid value.
662 * I don't think it is for 4.1. But with 4.0 I worry that, for
663 * example, a stray write retransmission could be accepted by
664 * the server when it should have been rejected. Therefore,
665 * adopt a trick from the sctp code to attempt to maximize the
666 * amount of time until an id is reused, by ensuring they always
667 * "increase" (mod INT_MAX):
671 kmem_cache_free(slab, stid);
675 static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
677 struct nfs4_stid *stid;
678 struct nfs4_ol_stateid *stp;
680 stid = nfs4_alloc_stid(clp, stateid_slab);
684 stp = openlockstateid(stid);
685 stp->st_stid.sc_free = nfs4_free_ol_stateid;
689 static void nfs4_free_deleg(struct nfs4_stid *stid)
691 kmem_cache_free(deleg_slab, stid);
692 atomic_long_dec(&num_delegations);
696 * When we recall a delegation, we should be careful not to hand it
697 * out again straight away.
698 * To ensure this we keep a pair of bloom filters ('new' and 'old')
699 * in which the filehandles of recalled delegations are "stored".
700 * If a filehandle appear in either filter, a delegation is blocked.
701 * When a delegation is recalled, the filehandle is stored in the "new"
703 * Every 30 seconds we swap the filters and clear the "new" one,
704 * unless both are empty of course.
706 * Each filter is 256 bits. We hash the filehandle to 32bit and use the
707 * low 3 bytes as hash-table indices.
709 * 'blocked_delegations_lock', which is always taken in block_delegations(),
710 * is used to manage concurrent access. Testing does not need the lock
711 * except when swapping the two filters.
713 static DEFINE_SPINLOCK(blocked_delegations_lock);
714 static struct bloom_pair {
715 int entries, old_entries;
717 int new; /* index into 'set' */
718 DECLARE_BITMAP(set[2], 256);
719 } blocked_delegations;
721 static int delegation_blocked(struct knfsd_fh *fh)
724 struct bloom_pair *bd = &blocked_delegations;
726 if (bd->entries == 0)
728 if (seconds_since_boot() - bd->swap_time > 30) {
729 spin_lock(&blocked_delegations_lock);
730 if (seconds_since_boot() - bd->swap_time > 30) {
731 bd->entries -= bd->old_entries;
732 bd->old_entries = bd->entries;
733 memset(bd->set[bd->new], 0,
736 bd->swap_time = seconds_since_boot();
738 spin_unlock(&blocked_delegations_lock);
740 hash = jhash(&fh->fh_base, fh->fh_size, 0);
741 if (test_bit(hash&255, bd->set[0]) &&
742 test_bit((hash>>8)&255, bd->set[0]) &&
743 test_bit((hash>>16)&255, bd->set[0]))
746 if (test_bit(hash&255, bd->set[1]) &&
747 test_bit((hash>>8)&255, bd->set[1]) &&
748 test_bit((hash>>16)&255, bd->set[1]))
754 static void block_delegations(struct knfsd_fh *fh)
757 struct bloom_pair *bd = &blocked_delegations;
759 hash = jhash(&fh->fh_base, fh->fh_size, 0);
761 spin_lock(&blocked_delegations_lock);
762 __set_bit(hash&255, bd->set[bd->new]);
763 __set_bit((hash>>8)&255, bd->set[bd->new]);
764 __set_bit((hash>>16)&255, bd->set[bd->new]);
765 if (bd->entries == 0)
766 bd->swap_time = seconds_since_boot();
768 spin_unlock(&blocked_delegations_lock);
771 static struct nfs4_delegation *
772 alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh,
773 struct nfs4_clnt_odstate *odstate)
775 struct nfs4_delegation *dp;
778 dprintk("NFSD alloc_init_deleg\n");
779 n = atomic_long_inc_return(&num_delegations);
780 if (n < 0 || n > max_delegations)
782 if (delegation_blocked(¤t_fh->fh_handle))
784 dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab));
788 dp->dl_stid.sc_free = nfs4_free_deleg;
790 * delegation seqid's are never incremented. The 4.1 special
791 * meaning of seqid 0 isn't meaningful, really, but let's avoid
792 * 0 anyway just for consistency and use 1:
794 dp->dl_stid.sc_stateid.si_generation = 1;
795 INIT_LIST_HEAD(&dp->dl_perfile);
796 INIT_LIST_HEAD(&dp->dl_perclnt);
797 INIT_LIST_HEAD(&dp->dl_recall_lru);
798 dp->dl_clnt_odstate = odstate;
799 get_clnt_odstate(odstate);
800 dp->dl_type = NFS4_OPEN_DELEGATE_READ;
802 nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
803 &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
806 atomic_long_dec(&num_delegations);
811 nfs4_put_stid(struct nfs4_stid *s)
813 struct nfs4_file *fp = s->sc_file;
814 struct nfs4_client *clp = s->sc_client;
816 might_lock(&clp->cl_lock);
818 if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) {
819 wake_up_all(&close_wq);
822 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
823 spin_unlock(&clp->cl_lock);
830 nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
832 stateid_t *src = &stid->sc_stateid;
834 spin_lock(&stid->sc_lock);
835 if (unlikely(++src->si_generation == 0))
836 src->si_generation = 1;
837 memcpy(dst, src, sizeof(*dst));
838 spin_unlock(&stid->sc_lock);
841 static void nfs4_put_deleg_lease(struct nfs4_file *fp)
843 struct file *filp = NULL;
845 spin_lock(&fp->fi_lock);
846 if (fp->fi_deleg_file && --fp->fi_delegees == 0)
847 swap(filp, fp->fi_deleg_file);
848 spin_unlock(&fp->fi_lock);
851 vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp);
856 void nfs4_unhash_stid(struct nfs4_stid *s)
862 * nfs4_get_existing_delegation - Discover if this delegation already exists
863 * @clp: a pointer to the nfs4_client we're granting a delegation to
864 * @fp: a pointer to the nfs4_file we're granting a delegation on
867 * On success: NULL if an existing delegation was not found.
869 * On error: -EAGAIN if one was previously granted to this nfs4_client
870 * for this nfs4_file.
875 nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp)
877 struct nfs4_delegation *searchdp = NULL;
878 struct nfs4_client *searchclp = NULL;
880 lockdep_assert_held(&state_lock);
881 lockdep_assert_held(&fp->fi_lock);
883 list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) {
884 searchclp = searchdp->dl_stid.sc_client;
885 if (clp == searchclp) {
893 * hash_delegation_locked - Add a delegation to the appropriate lists
894 * @dp: a pointer to the nfs4_delegation we are adding.
895 * @fp: a pointer to the nfs4_file we're granting a delegation on
898 * On success: NULL if the delegation was successfully hashed.
900 * On error: -EAGAIN if one was previously granted to this
901 * nfs4_client for this nfs4_file. Delegation is not hashed.
906 hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
909 struct nfs4_client *clp = dp->dl_stid.sc_client;
911 lockdep_assert_held(&state_lock);
912 lockdep_assert_held(&fp->fi_lock);
914 status = nfs4_get_existing_delegation(clp, fp);
918 atomic_inc(&dp->dl_stid.sc_count);
919 dp->dl_stid.sc_type = NFS4_DELEG_STID;
920 list_add(&dp->dl_perfile, &fp->fi_delegations);
921 list_add(&dp->dl_perclnt, &clp->cl_delegations);
926 unhash_delegation_locked(struct nfs4_delegation *dp)
928 struct nfs4_file *fp = dp->dl_stid.sc_file;
930 lockdep_assert_held(&state_lock);
932 if (list_empty(&dp->dl_perfile))
935 dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID;
936 /* Ensure that deleg break won't try to requeue it */
938 spin_lock(&fp->fi_lock);
939 list_del_init(&dp->dl_perclnt);
940 list_del_init(&dp->dl_recall_lru);
941 list_del_init(&dp->dl_perfile);
942 spin_unlock(&fp->fi_lock);
946 static void destroy_delegation(struct nfs4_delegation *dp)
950 spin_lock(&state_lock);
951 unhashed = unhash_delegation_locked(dp);
952 spin_unlock(&state_lock);
954 put_clnt_odstate(dp->dl_clnt_odstate);
955 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
956 nfs4_put_stid(&dp->dl_stid);
960 static void revoke_delegation(struct nfs4_delegation *dp)
962 struct nfs4_client *clp = dp->dl_stid.sc_client;
964 WARN_ON(!list_empty(&dp->dl_recall_lru));
966 put_clnt_odstate(dp->dl_clnt_odstate);
967 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
969 if (clp->cl_minorversion == 0)
970 nfs4_put_stid(&dp->dl_stid);
972 dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
973 spin_lock(&clp->cl_lock);
974 list_add(&dp->dl_recall_lru, &clp->cl_revoked);
975 spin_unlock(&clp->cl_lock);
983 static unsigned int clientid_hashval(u32 id)
985 return id & CLIENT_HASH_MASK;
988 static unsigned int clientstr_hashval(const char *name)
990 return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
994 * We store the NONE, READ, WRITE, and BOTH bits separately in the
995 * st_{access,deny}_bmap field of the stateid, in order to track not
996 * only what share bits are currently in force, but also what
997 * combinations of share bits previous opens have used. This allows us
998 * to enforce the recommendation of rfc 3530 14.2.19 that the server
999 * return an error if the client attempt to downgrade to a combination
1000 * of share bits not explicable by closing some of its previous opens.
1002 * XXX: This enforcement is actually incomplete, since we don't keep
1003 * track of access/deny bit combinations; so, e.g., we allow:
1005 * OPEN allow read, deny write
1006 * OPEN allow both, deny none
1007 * DOWNGRADE allow read, deny none
1009 * which we should reject.
1012 bmap_to_share_mode(unsigned long bmap) {
1014 unsigned int access = 0;
1016 for (i = 1; i < 4; i++) {
1017 if (test_bit(i, &bmap))
1023 /* set share access for a given stateid */
1025 set_access(u32 access, struct nfs4_ol_stateid *stp)
1027 unsigned char mask = 1 << access;
1029 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1030 stp->st_access_bmap |= mask;
1033 /* clear share access for a given stateid */
1035 clear_access(u32 access, struct nfs4_ol_stateid *stp)
1037 unsigned char mask = 1 << access;
1039 WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
1040 stp->st_access_bmap &= ~mask;
1043 /* test whether a given stateid has access */
1045 test_access(u32 access, struct nfs4_ol_stateid *stp)
1047 unsigned char mask = 1 << access;
1049 return (bool)(stp->st_access_bmap & mask);
1052 /* set share deny for a given stateid */
1054 set_deny(u32 deny, struct nfs4_ol_stateid *stp)
1056 unsigned char mask = 1 << deny;
1058 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1059 stp->st_deny_bmap |= mask;
1062 /* clear share deny for a given stateid */
1064 clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
1066 unsigned char mask = 1 << deny;
1068 WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
1069 stp->st_deny_bmap &= ~mask;
1072 /* test whether a given stateid is denying specific access */
1074 test_deny(u32 deny, struct nfs4_ol_stateid *stp)
1076 unsigned char mask = 1 << deny;
1078 return (bool)(stp->st_deny_bmap & mask);
1081 static int nfs4_access_to_omode(u32 access)
1083 switch (access & NFS4_SHARE_ACCESS_BOTH) {
1084 case NFS4_SHARE_ACCESS_READ:
1086 case NFS4_SHARE_ACCESS_WRITE:
1088 case NFS4_SHARE_ACCESS_BOTH:
1096 * A stateid that had a deny mode associated with it is being released
1097 * or downgraded. Recalculate the deny mode on the file.
1100 recalculate_deny_mode(struct nfs4_file *fp)
1102 struct nfs4_ol_stateid *stp;
1104 spin_lock(&fp->fi_lock);
1105 fp->fi_share_deny = 0;
1106 list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
1107 fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
1108 spin_unlock(&fp->fi_lock);
1112 reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
1115 bool change = false;
1117 for (i = 1; i < 4; i++) {
1118 if ((i & deny) != i) {
1124 /* Recalculate per-file deny mode if there was a change */
1126 recalculate_deny_mode(stp->st_stid.sc_file);
1129 /* release all access and file references for a given stateid */
1131 release_all_access(struct nfs4_ol_stateid *stp)
1134 struct nfs4_file *fp = stp->st_stid.sc_file;
1136 if (fp && stp->st_deny_bmap != 0)
1137 recalculate_deny_mode(fp);
1139 for (i = 1; i < 4; i++) {
1140 if (test_access(i, stp))
1141 nfs4_file_put_access(stp->st_stid.sc_file, i);
1142 clear_access(i, stp);
1146 static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
1148 kfree(sop->so_owner.data);
1149 sop->so_ops->so_free(sop);
1152 static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
1154 struct nfs4_client *clp = sop->so_client;
1156 might_lock(&clp->cl_lock);
1158 if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
1160 sop->so_ops->so_unhash(sop);
1161 spin_unlock(&clp->cl_lock);
1162 nfs4_free_stateowner(sop);
1165 static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp)
1167 struct nfs4_file *fp = stp->st_stid.sc_file;
1169 lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock);
1171 if (list_empty(&stp->st_perfile))
1174 spin_lock(&fp->fi_lock);
1175 list_del_init(&stp->st_perfile);
1176 spin_unlock(&fp->fi_lock);
1177 list_del(&stp->st_perstateowner);
1181 static void nfs4_free_ol_stateid(struct nfs4_stid *stid)
1183 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1185 put_clnt_odstate(stp->st_clnt_odstate);
1186 release_all_access(stp);
1187 if (stp->st_stateowner)
1188 nfs4_put_stateowner(stp->st_stateowner);
1189 kmem_cache_free(stateid_slab, stid);
1192 static void nfs4_free_lock_stateid(struct nfs4_stid *stid)
1194 struct nfs4_ol_stateid *stp = openlockstateid(stid);
1195 struct nfs4_lockowner *lo = lockowner(stp->st_stateowner);
1198 file = find_any_file(stp->st_stid.sc_file);
1200 filp_close(file, (fl_owner_t)lo);
1201 nfs4_free_ol_stateid(stid);
1205 * Put the persistent reference to an already unhashed generic stateid, while
1206 * holding the cl_lock. If it's the last reference, then put it onto the
1207 * reaplist for later destruction.
1209 static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp,
1210 struct list_head *reaplist)
1212 struct nfs4_stid *s = &stp->st_stid;
1213 struct nfs4_client *clp = s->sc_client;
1215 lockdep_assert_held(&clp->cl_lock);
1217 WARN_ON_ONCE(!list_empty(&stp->st_locks));
1219 if (!atomic_dec_and_test(&s->sc_count)) {
1220 wake_up_all(&close_wq);
1224 idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id);
1225 list_add(&stp->st_locks, reaplist);
1228 static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp)
1230 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
1232 lockdep_assert_held(&oo->oo_owner.so_client->cl_lock);
1234 list_del_init(&stp->st_locks);
1235 nfs4_unhash_stid(&stp->st_stid);
1236 return unhash_ol_stateid(stp);
1239 static void release_lock_stateid(struct nfs4_ol_stateid *stp)
1241 struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
1244 spin_lock(&oo->oo_owner.so_client->cl_lock);
1245 unhashed = unhash_lock_stateid(stp);
1246 spin_unlock(&oo->oo_owner.so_client->cl_lock);
1248 nfs4_put_stid(&stp->st_stid);
1251 static void unhash_lockowner_locked(struct nfs4_lockowner *lo)
1253 struct nfs4_client *clp = lo->lo_owner.so_client;
1255 lockdep_assert_held(&clp->cl_lock);
1257 list_del_init(&lo->lo_owner.so_strhash);
1261 * Free a list of generic stateids that were collected earlier after being
1265 free_ol_stateid_reaplist(struct list_head *reaplist)
1267 struct nfs4_ol_stateid *stp;
1268 struct nfs4_file *fp;
1272 while (!list_empty(reaplist)) {
1273 stp = list_first_entry(reaplist, struct nfs4_ol_stateid,
1275 list_del(&stp->st_locks);
1276 fp = stp->st_stid.sc_file;
1277 stp->st_stid.sc_free(&stp->st_stid);
1283 static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp,
1284 struct list_head *reaplist)
1286 struct nfs4_ol_stateid *stp;
1288 lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock);
1290 while (!list_empty(&open_stp->st_locks)) {
1291 stp = list_entry(open_stp->st_locks.next,
1292 struct nfs4_ol_stateid, st_locks);
1293 WARN_ON(!unhash_lock_stateid(stp));
1294 put_ol_stateid_locked(stp, reaplist);
1298 static bool unhash_open_stateid(struct nfs4_ol_stateid *stp,
1299 struct list_head *reaplist)
1303 lockdep_assert_held(&stp->st_stid.sc_client->cl_lock);
1305 unhashed = unhash_ol_stateid(stp);
1306 release_open_stateid_locks(stp, reaplist);
1310 static void release_open_stateid(struct nfs4_ol_stateid *stp)
1312 LIST_HEAD(reaplist);
1314 spin_lock(&stp->st_stid.sc_client->cl_lock);
1315 if (unhash_open_stateid(stp, &reaplist))
1316 put_ol_stateid_locked(stp, &reaplist);
1317 spin_unlock(&stp->st_stid.sc_client->cl_lock);
1318 free_ol_stateid_reaplist(&reaplist);
1321 static void unhash_openowner_locked(struct nfs4_openowner *oo)
1323 struct nfs4_client *clp = oo->oo_owner.so_client;
1325 lockdep_assert_held(&clp->cl_lock);
1327 list_del_init(&oo->oo_owner.so_strhash);
1328 list_del_init(&oo->oo_perclient);
1331 static void release_last_closed_stateid(struct nfs4_openowner *oo)
1333 struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net,
1335 struct nfs4_ol_stateid *s;
1337 spin_lock(&nn->client_lock);
1338 s = oo->oo_last_closed_stid;
1340 list_del_init(&oo->oo_close_lru);
1341 oo->oo_last_closed_stid = NULL;
1343 spin_unlock(&nn->client_lock);
1345 nfs4_put_stid(&s->st_stid);
1348 static void release_openowner(struct nfs4_openowner *oo)
1350 struct nfs4_ol_stateid *stp;
1351 struct nfs4_client *clp = oo->oo_owner.so_client;
1352 struct list_head reaplist;
1354 INIT_LIST_HEAD(&reaplist);
1356 spin_lock(&clp->cl_lock);
1357 unhash_openowner_locked(oo);
1358 while (!list_empty(&oo->oo_owner.so_stateids)) {
1359 stp = list_first_entry(&oo->oo_owner.so_stateids,
1360 struct nfs4_ol_stateid, st_perstateowner);
1361 if (unhash_open_stateid(stp, &reaplist))
1362 put_ol_stateid_locked(stp, &reaplist);
1364 spin_unlock(&clp->cl_lock);
1365 free_ol_stateid_reaplist(&reaplist);
1366 release_last_closed_stateid(oo);
1367 nfs4_put_stateowner(&oo->oo_owner);
1371 hash_sessionid(struct nfs4_sessionid *sessionid)
1373 struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid;
1375 return sid->sequence % SESSION_HASH_SIZE;
1378 #ifdef CONFIG_SUNRPC_DEBUG
1380 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1382 u32 *ptr = (u32 *)(&sessionid->data[0]);
1383 dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]);
1387 dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid)
1393 * Bump the seqid on cstate->replay_owner, and clear replay_owner if it
1394 * won't be used for replay.
1396 void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr)
1398 struct nfs4_stateowner *so = cstate->replay_owner;
1400 if (nfserr == nfserr_replay_me)
1403 if (!seqid_mutating_err(ntohl(nfserr))) {
1404 nfsd4_cstate_clear_replay(cstate);
1409 if (so->so_is_open_owner)
1410 release_last_closed_stateid(openowner(so));
1416 gen_sessionid(struct nfsd4_session *ses)
1418 struct nfs4_client *clp = ses->se_client;
1419 struct nfsd4_sessionid *sid;
1421 sid = (struct nfsd4_sessionid *)ses->se_sessionid.data;
1422 sid->clientid = clp->cl_clientid;
1423 sid->sequence = current_sessionid++;
1428 * The protocol defines ca_maxresponssize_cached to include the size of
1429 * the rpc header, but all we need to cache is the data starting after
1430 * the end of the initial SEQUENCE operation--the rest we regenerate
1431 * each time. Therefore we can advertise a ca_maxresponssize_cached
1432 * value that is the number of bytes in our cache plus a few additional
1433 * bytes. In order to stay on the safe side, and not promise more than
1434 * we can cache, those additional bytes must be the minimum possible: 24
1435 * bytes of rpc header (xid through accept state, with AUTH_NULL
1436 * verifier), 12 for the compound header (with zero-length tag), and 44
1437 * for the SEQUENCE op response:
1439 #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44)
1442 free_session_slots(struct nfsd4_session *ses)
1446 for (i = 0; i < ses->se_fchannel.maxreqs; i++)
1447 kfree(ses->se_slots[i]);
1451 * We don't actually need to cache the rpc and session headers, so we
1452 * can allocate a little less for each slot:
1454 static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca)
1458 if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ)
1461 size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ;
1462 return size + sizeof(struct nfsd4_slot);
1466 * XXX: If we run out of reserved DRC memory we could (up to a point)
1467 * re-negotiate active sessions and reduce their slot usage to make
1468 * room for new connections. For now we just fail the create session.
1470 static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
1472 u32 slotsize = slot_bytes(ca);
1473 u32 num = ca->maxreqs;
1476 spin_lock(&nfsd_drc_lock);
1477 avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
1478 nfsd_drc_max_mem - nfsd_drc_mem_used);
1479 num = min_t(int, num, avail / slotsize);
1480 nfsd_drc_mem_used += num * slotsize;
1481 spin_unlock(&nfsd_drc_lock);
1486 static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca)
1488 int slotsize = slot_bytes(ca);
1490 spin_lock(&nfsd_drc_lock);
1491 nfsd_drc_mem_used -= slotsize * ca->maxreqs;
1492 spin_unlock(&nfsd_drc_lock);
1495 static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
1496 struct nfsd4_channel_attrs *battrs)
1498 int numslots = fattrs->maxreqs;
1499 int slotsize = slot_bytes(fattrs);
1500 struct nfsd4_session *new;
1503 BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
1504 + sizeof(struct nfsd4_session) > PAGE_SIZE);
1505 mem = numslots * sizeof(struct nfsd4_slot *);
1507 new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
1510 /* allocate each struct nfsd4_slot and data cache in one piece */
1511 for (i = 0; i < numslots; i++) {
1512 new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL);
1513 if (!new->se_slots[i])
1517 memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs));
1518 memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs));
1523 kfree(new->se_slots[i]);
1528 static void free_conn(struct nfsd4_conn *c)
1530 svc_xprt_put(c->cn_xprt);
1534 static void nfsd4_conn_lost(struct svc_xpt_user *u)
1536 struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
1537 struct nfs4_client *clp = c->cn_session->se_client;
1539 spin_lock(&clp->cl_lock);
1540 if (!list_empty(&c->cn_persession)) {
1541 list_del(&c->cn_persession);
1544 nfsd4_probe_callback(clp);
1545 spin_unlock(&clp->cl_lock);
1548 static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags)
1550 struct nfsd4_conn *conn;
1552 conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL);
1555 svc_xprt_get(rqstp->rq_xprt);
1556 conn->cn_xprt = rqstp->rq_xprt;
1557 conn->cn_flags = flags;
1558 INIT_LIST_HEAD(&conn->cn_xpt_user.list);
1562 static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1564 conn->cn_session = ses;
1565 list_add(&conn->cn_persession, &ses->se_conns);
1568 static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses)
1570 struct nfs4_client *clp = ses->se_client;
1572 spin_lock(&clp->cl_lock);
1573 __nfsd4_hash_conn(conn, ses);
1574 spin_unlock(&clp->cl_lock);
1577 static int nfsd4_register_conn(struct nfsd4_conn *conn)
1579 conn->cn_xpt_user.callback = nfsd4_conn_lost;
1580 return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user);
1583 static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses)
1587 nfsd4_hash_conn(conn, ses);
1588 ret = nfsd4_register_conn(conn);
1590 /* oops; xprt is already down: */
1591 nfsd4_conn_lost(&conn->cn_xpt_user);
1592 /* We may have gained or lost a callback channel: */
1593 nfsd4_probe_callback_sync(ses->se_client);
1596 static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses)
1598 u32 dir = NFS4_CDFC4_FORE;
1600 if (cses->flags & SESSION4_BACK_CHAN)
1601 dir |= NFS4_CDFC4_BACK;
1602 return alloc_conn(rqstp, dir);
1605 /* must be called under client_lock */
1606 static void nfsd4_del_conns(struct nfsd4_session *s)
1608 struct nfs4_client *clp = s->se_client;
1609 struct nfsd4_conn *c;
1611 spin_lock(&clp->cl_lock);
1612 while (!list_empty(&s->se_conns)) {
1613 c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession);
1614 list_del_init(&c->cn_persession);
1615 spin_unlock(&clp->cl_lock);
1617 unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user);
1620 spin_lock(&clp->cl_lock);
1622 spin_unlock(&clp->cl_lock);
1625 static void __free_session(struct nfsd4_session *ses)
1627 free_session_slots(ses);
1631 static void free_session(struct nfsd4_session *ses)
1633 nfsd4_del_conns(ses);
1634 nfsd4_put_drc_mem(&ses->se_fchannel);
1635 __free_session(ses);
1638 static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses)
1641 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1643 new->se_client = clp;
1646 INIT_LIST_HEAD(&new->se_conns);
1648 new->se_cb_seq_nr = 1;
1649 new->se_flags = cses->flags;
1650 new->se_cb_prog = cses->callback_prog;
1651 new->se_cb_sec = cses->cb_sec;
1652 atomic_set(&new->se_ref, 0);
1653 idx = hash_sessionid(&new->se_sessionid);
1654 list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]);
1655 spin_lock(&clp->cl_lock);
1656 list_add(&new->se_perclnt, &clp->cl_sessions);
1657 spin_unlock(&clp->cl_lock);
1660 struct sockaddr *sa = svc_addr(rqstp);
1662 * This is a little silly; with sessions there's no real
1663 * use for the callback address. Use the peer address
1664 * as a reasonable default for now, but consider fixing
1665 * the rpc client not to require an address in the
1668 rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa);
1669 clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa);
1673 /* caller must hold client_lock */
1674 static struct nfsd4_session *
1675 __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net)
1677 struct nfsd4_session *elem;
1679 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
1681 lockdep_assert_held(&nn->client_lock);
1683 dump_sessionid(__func__, sessionid);
1684 idx = hash_sessionid(sessionid);
1685 /* Search in the appropriate list */
1686 list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) {
1687 if (!memcmp(elem->se_sessionid.data, sessionid->data,
1688 NFS4_MAX_SESSIONID_LEN)) {
1693 dprintk("%s: session not found\n", __func__);
1697 static struct nfsd4_session *
1698 find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net,
1701 struct nfsd4_session *session;
1702 __be32 status = nfserr_badsession;
1704 session = __find_in_sessionid_hashtbl(sessionid, net);
1707 status = nfsd4_get_session_locked(session);
1715 /* caller must hold client_lock */
1717 unhash_session(struct nfsd4_session *ses)
1719 struct nfs4_client *clp = ses->se_client;
1720 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1722 lockdep_assert_held(&nn->client_lock);
1724 list_del(&ses->se_hash);
1725 spin_lock(&ses->se_client->cl_lock);
1726 list_del(&ses->se_perclnt);
1727 spin_unlock(&ses->se_client->cl_lock);
1730 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
1732 STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
1735 * We're assuming the clid was not given out from a boot
1736 * precisely 2^32 (about 136 years) before this one. That seems
1737 * a safe assumption:
1739 if (clid->cl_boot == (u32)nn->boot_time)
1741 dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n",
1742 clid->cl_boot, clid->cl_id, nn->boot_time);
1747 * XXX Should we use a slab cache ?
1748 * This type of memory management is somewhat inefficient, but we use it
1749 * anyway since SETCLIENTID is not a common operation.
1751 static struct nfs4_client *alloc_client(struct xdr_netobj name)
1753 struct nfs4_client *clp;
1756 clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL);
1759 clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
1760 if (clp->cl_name.data == NULL)
1762 clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) *
1763 OWNER_HASH_SIZE, GFP_KERNEL);
1764 if (!clp->cl_ownerstr_hashtbl)
1765 goto err_no_hashtbl;
1766 for (i = 0; i < OWNER_HASH_SIZE; i++)
1767 INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
1768 clp->cl_name.len = name.len;
1769 INIT_LIST_HEAD(&clp->cl_sessions);
1770 idr_init(&clp->cl_stateids);
1771 atomic_set(&clp->cl_refcount, 0);
1772 clp->cl_cb_state = NFSD4_CB_UNKNOWN;
1773 INIT_LIST_HEAD(&clp->cl_idhash);
1774 INIT_LIST_HEAD(&clp->cl_openowners);
1775 INIT_LIST_HEAD(&clp->cl_delegations);
1776 INIT_LIST_HEAD(&clp->cl_lru);
1777 INIT_LIST_HEAD(&clp->cl_revoked);
1778 #ifdef CONFIG_NFSD_PNFS
1779 INIT_LIST_HEAD(&clp->cl_lo_states);
1781 spin_lock_init(&clp->cl_lock);
1782 rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
1785 kfree(clp->cl_name.data);
1792 free_client(struct nfs4_client *clp)
1794 while (!list_empty(&clp->cl_sessions)) {
1795 struct nfsd4_session *ses;
1796 ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,
1798 list_del(&ses->se_perclnt);
1799 WARN_ON_ONCE(atomic_read(&ses->se_ref));
1802 rpc_destroy_wait_queue(&clp->cl_cb_waitq);
1803 free_svc_cred(&clp->cl_cred);
1804 kfree(clp->cl_ownerstr_hashtbl);
1805 kfree(clp->cl_name.data);
1806 idr_destroy(&clp->cl_stateids);
1810 /* must be called under the client_lock */
1812 unhash_client_locked(struct nfs4_client *clp)
1814 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1815 struct nfsd4_session *ses;
1817 lockdep_assert_held(&nn->client_lock);
1819 /* Mark the client as expired! */
1821 /* Make it invisible */
1822 if (!list_empty(&clp->cl_idhash)) {
1823 list_del_init(&clp->cl_idhash);
1824 if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
1825 rb_erase(&clp->cl_namenode, &nn->conf_name_tree);
1827 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
1829 list_del_init(&clp->cl_lru);
1830 spin_lock(&clp->cl_lock);
1831 list_for_each_entry(ses, &clp->cl_sessions, se_perclnt)
1832 list_del_init(&ses->se_hash);
1833 spin_unlock(&clp->cl_lock);
1837 unhash_client(struct nfs4_client *clp)
1839 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
1841 spin_lock(&nn->client_lock);
1842 unhash_client_locked(clp);
1843 spin_unlock(&nn->client_lock);
1846 static __be32 mark_client_expired_locked(struct nfs4_client *clp)
1848 if (atomic_read(&clp->cl_refcount))
1849 return nfserr_jukebox;
1850 unhash_client_locked(clp);
1855 __destroy_client(struct nfs4_client *clp)
1857 struct nfs4_openowner *oo;
1858 struct nfs4_delegation *dp;
1859 struct list_head reaplist;
1861 INIT_LIST_HEAD(&reaplist);
1862 spin_lock(&state_lock);
1863 while (!list_empty(&clp->cl_delegations)) {
1864 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
1865 WARN_ON(!unhash_delegation_locked(dp));
1866 list_add(&dp->dl_recall_lru, &reaplist);
1868 spin_unlock(&state_lock);
1869 while (!list_empty(&reaplist)) {
1870 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
1871 list_del_init(&dp->dl_recall_lru);
1872 put_clnt_odstate(dp->dl_clnt_odstate);
1873 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
1874 nfs4_put_stid(&dp->dl_stid);
1876 while (!list_empty(&clp->cl_revoked)) {
1877 dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru);
1878 list_del_init(&dp->dl_recall_lru);
1879 nfs4_put_stid(&dp->dl_stid);
1881 while (!list_empty(&clp->cl_openowners)) {
1882 oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient);
1883 nfs4_get_stateowner(&oo->oo_owner);
1884 release_openowner(oo);
1886 nfsd4_return_all_client_layouts(clp);
1887 nfsd4_shutdown_callback(clp);
1888 if (clp->cl_cb_conn.cb_xprt)
1889 svc_xprt_put(clp->cl_cb_conn.cb_xprt);
1894 destroy_client(struct nfs4_client *clp)
1897 __destroy_client(clp);
1900 static void expire_client(struct nfs4_client *clp)
1903 nfsd4_client_record_remove(clp);
1904 __destroy_client(clp);
1907 static void copy_verf(struct nfs4_client *target, nfs4_verifier *source)
1909 memcpy(target->cl_verifier.data, source->data,
1910 sizeof(target->cl_verifier.data));
1913 static void copy_clid(struct nfs4_client *target, struct nfs4_client *source)
1915 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
1916 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
1919 int strdup_if_nonnull(char **target, char *source)
1922 *target = kstrdup(source, GFP_KERNEL);
1930 static int copy_cred(struct svc_cred *target, struct svc_cred *source)
1934 ret = strdup_if_nonnull(&target->cr_principal, source->cr_principal);
1937 ret = strdup_if_nonnull(&target->cr_raw_principal,
1938 source->cr_raw_principal);
1941 target->cr_flavor = source->cr_flavor;
1942 target->cr_uid = source->cr_uid;
1943 target->cr_gid = source->cr_gid;
1944 target->cr_group_info = source->cr_group_info;
1945 get_group_info(target->cr_group_info);
1946 target->cr_gss_mech = source->cr_gss_mech;
1947 if (source->cr_gss_mech)
1948 gss_mech_get(source->cr_gss_mech);
1953 compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
1955 if (o1->len < o2->len)
1957 if (o1->len > o2->len)
1959 return memcmp(o1->data, o2->data, o1->len);
1962 static int same_name(const char *n1, const char *n2)
1964 return 0 == memcmp(n1, n2, HEXDIR_LEN);
1968 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
1970 return 0 == memcmp(v1->data, v2->data, sizeof(v1->data));
1974 same_clid(clientid_t *cl1, clientid_t *cl2)
1976 return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
1979 static bool groups_equal(struct group_info *g1, struct group_info *g2)
1983 if (g1->ngroups != g2->ngroups)
1985 for (i=0; i<g1->ngroups; i++)
1986 if (!gid_eq(g1->gid[i], g2->gid[i]))
1992 * RFC 3530 language requires clid_inuse be returned when the
1993 * "principal" associated with a requests differs from that previously
1994 * used. We use uid, gid's, and gss principal string as our best
1995 * approximation. We also don't want to allow non-gss use of a client
1996 * established using gss: in theory cr_principal should catch that
1997 * change, but in practice cr_principal can be null even in the gss case
1998 * since gssd doesn't always pass down a principal string.
2000 static bool is_gss_cred(struct svc_cred *cr)
2002 /* Is cr_flavor one of the gss "pseudoflavors"?: */
2003 return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR);
2008 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
2010 if ((is_gss_cred(cr1) != is_gss_cred(cr2))
2011 || (!uid_eq(cr1->cr_uid, cr2->cr_uid))
2012 || (!gid_eq(cr1->cr_gid, cr2->cr_gid))
2013 || !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
2015 if (cr1->cr_principal == cr2->cr_principal)
2017 if (!cr1->cr_principal || !cr2->cr_principal)
2019 return 0 == strcmp(cr1->cr_principal, cr2->cr_principal);
2022 static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp)
2024 struct svc_cred *cr = &rqstp->rq_cred;
2027 if (!cr->cr_gss_mech)
2029 service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor);
2030 return service == RPC_GSS_SVC_INTEGRITY ||
2031 service == RPC_GSS_SVC_PRIVACY;
2034 bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp)
2036 struct svc_cred *cr = &rqstp->rq_cred;
2038 if (!cl->cl_mach_cred)
2040 if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech)
2042 if (!svc_rqst_integrity_protected(rqstp))
2044 if (cl->cl_cred.cr_raw_principal)
2045 return 0 == strcmp(cl->cl_cred.cr_raw_principal,
2046 cr->cr_raw_principal);
2047 if (!cr->cr_principal)
2049 return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal);
2052 static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn)
2057 * This is opaque to client, so no need to byte-swap. Use
2058 * __force to keep sparse happy
2060 verf[0] = (__force __be32)get_seconds();
2061 verf[1] = (__force __be32)nn->clverifier_counter++;
2062 memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data));
2065 static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn)
2067 clp->cl_clientid.cl_boot = nn->boot_time;
2068 clp->cl_clientid.cl_id = nn->clientid_counter++;
2069 gen_confirm(clp, nn);
2072 static struct nfs4_stid *
2073 find_stateid_locked(struct nfs4_client *cl, stateid_t *t)
2075 struct nfs4_stid *ret;
2077 ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id);
2078 if (!ret || !ret->sc_type)
2083 static struct nfs4_stid *
2084 find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
2086 struct nfs4_stid *s;
2088 spin_lock(&cl->cl_lock);
2089 s = find_stateid_locked(cl, t);
2091 if (typemask & s->sc_type)
2092 atomic_inc(&s->sc_count);
2096 spin_unlock(&cl->cl_lock);
2100 static struct nfs4_client *create_client(struct xdr_netobj name,
2101 struct svc_rqst *rqstp, nfs4_verifier *verf)
2103 struct nfs4_client *clp;
2104 struct sockaddr *sa = svc_addr(rqstp);
2106 struct net *net = SVC_NET(rqstp);
2108 clp = alloc_client(name);
2112 ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
2117 nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
2118 clp->cl_time = get_seconds();
2119 clear_bit(0, &clp->cl_cb_slot_busy);
2120 copy_verf(clp, verf);
2121 rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
2122 clp->cl_cb_session = NULL;
2128 add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
2130 struct rb_node **new = &(root->rb_node), *parent = NULL;
2131 struct nfs4_client *clp;
2134 clp = rb_entry(*new, struct nfs4_client, cl_namenode);
2137 if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0)
2138 new = &((*new)->rb_left);
2140 new = &((*new)->rb_right);
2143 rb_link_node(&new_clp->cl_namenode, parent, new);
2144 rb_insert_color(&new_clp->cl_namenode, root);
2147 static struct nfs4_client *
2148 find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
2151 struct rb_node *node = root->rb_node;
2152 struct nfs4_client *clp;
2155 clp = rb_entry(node, struct nfs4_client, cl_namenode);
2156 cmp = compare_blob(&clp->cl_name, name);
2158 node = node->rb_left;
2160 node = node->rb_right;
2168 add_to_unconfirmed(struct nfs4_client *clp)
2170 unsigned int idhashval;
2171 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2173 lockdep_assert_held(&nn->client_lock);
2175 clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2176 add_clp_to_name_tree(clp, &nn->unconf_name_tree);
2177 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2178 list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]);
2179 renew_client_locked(clp);
2183 move_to_confirmed(struct nfs4_client *clp)
2185 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
2186 struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
2188 lockdep_assert_held(&nn->client_lock);
2190 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
2191 list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
2192 rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
2193 add_clp_to_name_tree(clp, &nn->conf_name_tree);
2194 set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
2195 renew_client_locked(clp);
2198 static struct nfs4_client *
2199 find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions)
2201 struct nfs4_client *clp;
2202 unsigned int idhashval = clientid_hashval(clid->cl_id);
2204 list_for_each_entry(clp, &tbl[idhashval], cl_idhash) {
2205 if (same_clid(&clp->cl_clientid, clid)) {
2206 if ((bool)clp->cl_minorversion != sessions)
2208 renew_client_locked(clp);
2215 static struct nfs4_client *
2216 find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2218 struct list_head *tbl = nn->conf_id_hashtbl;
2220 lockdep_assert_held(&nn->client_lock);
2221 return find_client_in_id_table(tbl, clid, sessions);
2224 static struct nfs4_client *
2225 find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn)
2227 struct list_head *tbl = nn->unconf_id_hashtbl;
2229 lockdep_assert_held(&nn->client_lock);
2230 return find_client_in_id_table(tbl, clid, sessions);
2233 static bool clp_used_exchangeid(struct nfs4_client *clp)
2235 return clp->cl_exchange_flags != 0;
2238 static struct nfs4_client *
2239 find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2241 lockdep_assert_held(&nn->client_lock);
2242 return find_clp_in_name_tree(name, &nn->conf_name_tree);
2245 static struct nfs4_client *
2246 find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn)
2248 lockdep_assert_held(&nn->client_lock);
2249 return find_clp_in_name_tree(name, &nn->unconf_name_tree);
2253 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp)
2255 struct nfs4_cb_conn *conn = &clp->cl_cb_conn;
2256 struct sockaddr *sa = svc_addr(rqstp);
2257 u32 scopeid = rpc_get_scope_id(sa);
2258 unsigned short expected_family;
2260 /* Currently, we only support tcp and tcp6 for the callback channel */
2261 if (se->se_callback_netid_len == 3 &&
2262 !memcmp(se->se_callback_netid_val, "tcp", 3))
2263 expected_family = AF_INET;
2264 else if (se->se_callback_netid_len == 4 &&
2265 !memcmp(se->se_callback_netid_val, "tcp6", 4))
2266 expected_family = AF_INET6;
2270 conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val,
2271 se->se_callback_addr_len,
2272 (struct sockaddr *)&conn->cb_addr,
2273 sizeof(conn->cb_addr));
2275 if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family)
2278 if (conn->cb_addr.ss_family == AF_INET6)
2279 ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid;
2281 conn->cb_prog = se->se_callback_prog;
2282 conn->cb_ident = se->se_callback_ident;
2283 memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen);
2286 conn->cb_addr.ss_family = AF_UNSPEC;
2287 conn->cb_addrlen = 0;
2288 dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
2289 "will not receive delegations\n",
2290 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
2296 * Cache a reply. nfsd4_check_resp_size() has bounded the cache size.
2299 nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
2301 struct xdr_buf *buf = resp->xdr.buf;
2302 struct nfsd4_slot *slot = resp->cstate.slot;
2305 dprintk("--> %s slot %p\n", __func__, slot);
2307 slot->sl_opcnt = resp->opcnt;
2308 slot->sl_status = resp->cstate.status;
2310 slot->sl_flags |= NFSD4_SLOT_INITIALIZED;
2311 if (nfsd4_not_cached(resp)) {
2312 slot->sl_datalen = 0;
2315 base = resp->cstate.data_offset;
2316 slot->sl_datalen = buf->len - base;
2317 if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen))
2318 WARN(1, "%s: sessions DRC could not cache compound\n",
2324 * Encode the replay sequence operation from the slot values.
2325 * If cachethis is FALSE encode the uncached rep error on the next
2326 * operation which sets resp->p and increments resp->opcnt for
2327 * nfs4svc_encode_compoundres.
2331 nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args,
2332 struct nfsd4_compoundres *resp)
2334 struct nfsd4_op *op;
2335 struct nfsd4_slot *slot = resp->cstate.slot;
2337 /* Encode the replayed sequence operation */
2338 op = &args->ops[resp->opcnt - 1];
2339 nfsd4_encode_operation(resp, op);
2341 /* Return nfserr_retry_uncached_rep in next operation. */
2342 if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) {
2343 op = &args->ops[resp->opcnt++];
2344 op->status = nfserr_retry_uncached_rep;
2345 nfsd4_encode_operation(resp, op);
2351 * The sequence operation is not cached because we can use the slot and
2355 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
2356 struct nfsd4_sequence *seq)
2358 struct nfsd4_slot *slot = resp->cstate.slot;
2359 struct xdr_stream *xdr = &resp->xdr;
2363 dprintk("--> %s slot %p\n", __func__, slot);
2365 status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp);
2369 p = xdr_reserve_space(xdr, slot->sl_datalen);
2372 return nfserr_serverfault;
2374 xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen);
2375 xdr_commit_encode(xdr);
2377 resp->opcnt = slot->sl_opcnt;
2378 return slot->sl_status;
2382 * Set the exchange_id flags returned by the server.
2385 nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
2387 #ifdef CONFIG_NFSD_PNFS
2388 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS;
2390 new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS;
2393 /* Referrals are supported, Migration is not. */
2394 new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
2396 /* set the wire flags to return to client. */
2397 clid->flags = new->cl_exchange_flags;
2400 static bool client_has_openowners(struct nfs4_client *clp)
2402 struct nfs4_openowner *oo;
2404 list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) {
2405 if (!list_empty(&oo->oo_owner.so_stateids))
2411 static bool client_has_state(struct nfs4_client *clp)
2413 return client_has_openowners(clp)
2414 #ifdef CONFIG_NFSD_PNFS
2415 || !list_empty(&clp->cl_lo_states)
2417 || !list_empty(&clp->cl_delegations)
2418 || !list_empty(&clp->cl_sessions);
2422 nfsd4_exchange_id(struct svc_rqst *rqstp,
2423 struct nfsd4_compound_state *cstate,
2424 struct nfsd4_exchange_id *exid)
2426 struct nfs4_client *conf, *new;
2427 struct nfs4_client *unconf = NULL;
2429 char addr_str[INET6_ADDRSTRLEN];
2430 nfs4_verifier verf = exid->verifier;
2431 struct sockaddr *sa = svc_addr(rqstp);
2432 bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
2433 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2435 rpc_ntop(sa, addr_str, sizeof(addr_str));
2436 dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
2437 "ip_addr=%s flags %x, spa_how %d\n",
2438 __func__, rqstp, exid, exid->clname.len, exid->clname.data,
2439 addr_str, exid->flags, exid->spa_how);
2441 if (exid->flags & ~EXCHGID4_FLAG_MASK_A)
2442 return nfserr_inval;
2444 new = create_client(exid->clname, rqstp, &verf);
2446 return nfserr_jukebox;
2448 switch (exid->spa_how) {
2450 exid->spo_must_enforce[0] = 0;
2451 exid->spo_must_enforce[1] = (
2452 1 << (OP_BIND_CONN_TO_SESSION - 32) |
2453 1 << (OP_EXCHANGE_ID - 32) |
2454 1 << (OP_CREATE_SESSION - 32) |
2455 1 << (OP_DESTROY_SESSION - 32) |
2456 1 << (OP_DESTROY_CLIENTID - 32));
2458 exid->spo_must_allow[0] &= (1 << (OP_CLOSE) |
2459 1 << (OP_OPEN_DOWNGRADE) |
2461 1 << (OP_DELEGRETURN));
2463 exid->spo_must_allow[1] &= (
2464 1 << (OP_TEST_STATEID - 32) |
2465 1 << (OP_FREE_STATEID - 32));
2466 if (!svc_rqst_integrity_protected(rqstp)) {
2467 status = nfserr_inval;
2471 * Sometimes userspace doesn't give us a principal.
2472 * Which is a bug, really. Anyway, we can't enforce
2473 * MACH_CRED in that case, better to give up now:
2475 if (!new->cl_cred.cr_principal &&
2476 !new->cl_cred.cr_raw_principal) {
2477 status = nfserr_serverfault;
2480 new->cl_mach_cred = true;
2483 default: /* checked by xdr code */
2486 status = nfserr_encr_alg_unsupp;
2490 /* Cases below refer to rfc 5661 section 18.35.4: */
2491 spin_lock(&nn->client_lock);
2492 conf = find_confirmed_client_by_name(&exid->clname, nn);
2494 bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
2495 bool verfs_match = same_verf(&verf, &conf->cl_verifier);
2498 if (!clp_used_exchangeid(conf)) { /* buggy client */
2499 status = nfserr_inval;
2502 if (!nfsd4_mach_creds_match(conf, rqstp)) {
2503 status = nfserr_wrong_cred;
2506 if (!creds_match) { /* case 9 */
2507 status = nfserr_perm;
2510 if (!verfs_match) { /* case 8 */
2511 status = nfserr_not_same;
2515 exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
2518 if (!creds_match) { /* case 3 */
2519 if (client_has_state(conf)) {
2520 status = nfserr_clid_inuse;
2525 if (verfs_match) { /* case 2 */
2526 conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
2529 /* case 5, client reboot */
2534 if (update) { /* case 7 */
2535 status = nfserr_noent;
2539 unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
2540 if (unconf) /* case 4, possible retry or client restart */
2541 unhash_client_locked(unconf);
2543 /* case 1 (normal case) */
2546 status = mark_client_expired_locked(conf);
2550 new->cl_minorversion = cstate->minorversion;
2551 new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
2552 new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
2555 add_to_unconfirmed(new);
2558 exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
2559 exid->clientid.cl_id = conf->cl_clientid.cl_id;
2561 exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
2562 nfsd4_set_ex_flags(conf, exid);
2564 dprintk("nfsd4_exchange_id seqid %d flags %x\n",
2565 conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
2569 spin_unlock(&nn->client_lock);
2574 expire_client(unconf);
2579 check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
2581 dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
2584 /* The slot is in use, and no response has been sent. */
2586 if (seqid == slot_seqid)
2587 return nfserr_jukebox;
2589 return nfserr_seq_misordered;
2591 /* Note unsigned 32-bit arithmetic handles wraparound: */
2592 if (likely(seqid == slot_seqid + 1))
2594 if (seqid == slot_seqid)
2595 return nfserr_replay_cache;
2596 return nfserr_seq_misordered;
2600 * Cache the create session result into the create session single DRC
2601 * slot cache by saving the xdr structure. sl_seqid has been set.
2602 * Do this for solo or embedded create session operations.
2605 nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
2606 struct nfsd4_clid_slot *slot, __be32 nfserr)
2608 slot->sl_status = nfserr;
2609 memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
2613 nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses,
2614 struct nfsd4_clid_slot *slot)
2616 memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses));
2617 return slot->sl_status;
2620 #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\
2621 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \
2622 1 + /* MIN tag is length with zero, only length */ \
2623 3 + /* version, opcount, opcode */ \
2624 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2625 /* seqid, slotID, slotID, cache */ \
2626 4 ) * sizeof(__be32))
2628 #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\
2629 2 + /* verifier: AUTH_NULL, length 0 */\
2631 1 + /* MIN tag is length with zero, only length */ \
2632 3 + /* opcount, opcode, opstatus*/ \
2633 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \
2634 /* seqid, slotID, slotID, slotID, status */ \
2635 5 ) * sizeof(__be32))
2637 static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn)
2639 u32 maxrpc = nn->nfsd_serv->sv_max_mesg;
2641 if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ)
2642 return nfserr_toosmall;
2643 if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ)
2644 return nfserr_toosmall;
2645 ca->headerpadsz = 0;
2646 ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc);
2647 ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc);
2648 ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND);
2649 ca->maxresp_cached = min_t(u32, ca->maxresp_cached,
2650 NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ);
2651 ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION);
2653 * Note decreasing slot size below client's request may make it
2654 * difficult for client to function correctly, whereas
2655 * decreasing the number of slots will (just?) affect
2656 * performance. When short on memory we therefore prefer to
2657 * decrease number of slots instead of their size. Clients that
2658 * request larger slots than they need will get poor results:
2660 ca->maxreqs = nfsd4_get_drc_mem(ca);
2662 return nfserr_jukebox;
2668 * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now.
2669 * These are based on similar macros in linux/sunrpc/msg_prot.h .
2671 #define RPC_MAX_HEADER_WITH_AUTH_SYS \
2672 (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK))
2674 #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \
2675 (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK))
2677 #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \
2678 RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32))
2679 #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \
2680 RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \
2683 static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca)
2685 ca->headerpadsz = 0;
2687 if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ)
2688 return nfserr_toosmall;
2689 if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ)
2690 return nfserr_toosmall;
2691 ca->maxresp_cached = 0;
2693 return nfserr_toosmall;
2698 static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs)
2700 switch (cbs->flavor) {
2706 * GSS case: the spec doesn't allow us to return this
2707 * error. But it also doesn't allow us not to support
2709 * I'd rather this fail hard than return some error the
2710 * client might think it can already handle:
2712 return nfserr_encr_alg_unsupp;
2717 nfsd4_create_session(struct svc_rqst *rqstp,
2718 struct nfsd4_compound_state *cstate,
2719 struct nfsd4_create_session *cr_ses)
2721 struct sockaddr *sa = svc_addr(rqstp);
2722 struct nfs4_client *conf, *unconf;
2723 struct nfs4_client *old = NULL;
2724 struct nfsd4_session *new;
2725 struct nfsd4_conn *conn;
2726 struct nfsd4_clid_slot *cs_slot = NULL;
2728 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2730 if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
2731 return nfserr_inval;
2732 status = nfsd4_check_cb_sec(&cr_ses->cb_sec);
2735 status = check_forechannel_attrs(&cr_ses->fore_channel, nn);
2738 status = check_backchannel_attrs(&cr_ses->back_channel);
2740 goto out_release_drc_mem;
2741 status = nfserr_jukebox;
2742 new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel);
2744 goto out_release_drc_mem;
2745 conn = alloc_conn_from_crses(rqstp, cr_ses);
2747 goto out_free_session;
2749 spin_lock(&nn->client_lock);
2750 unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn);
2751 conf = find_confirmed_client(&cr_ses->clientid, true, nn);
2752 WARN_ON_ONCE(conf && unconf);
2755 status = nfserr_wrong_cred;
2756 if (!nfsd4_mach_creds_match(conf, rqstp))
2758 cs_slot = &conf->cl_cs_slot;
2759 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2761 if (status == nfserr_replay_cache)
2762 status = nfsd4_replay_create_session(cr_ses, cs_slot);
2765 } else if (unconf) {
2766 if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
2767 !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
2768 status = nfserr_clid_inuse;
2771 status = nfserr_wrong_cred;
2772 if (!nfsd4_mach_creds_match(unconf, rqstp))
2774 cs_slot = &unconf->cl_cs_slot;
2775 status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
2777 /* an unconfirmed replay returns misordered */
2778 status = nfserr_seq_misordered;
2781 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
2783 status = mark_client_expired_locked(old);
2789 move_to_confirmed(unconf);
2792 status = nfserr_stale_clientid;
2796 /* Persistent sessions are not supported */
2797 cr_ses->flags &= ~SESSION4_PERSIST;
2798 /* Upshifting from TCP to RDMA is not supported */
2799 cr_ses->flags &= ~SESSION4_RDMA;
2801 init_session(rqstp, new, conf, cr_ses);
2802 nfsd4_get_session_locked(new);
2804 memcpy(cr_ses->sessionid.data, new->se_sessionid.data,
2805 NFS4_MAX_SESSIONID_LEN);
2806 cs_slot->sl_seqid++;
2807 cr_ses->seqid = cs_slot->sl_seqid;
2809 /* cache solo and embedded create sessions under the client_lock */
2810 nfsd4_cache_create_session(cr_ses, cs_slot, status);
2811 spin_unlock(&nn->client_lock);
2812 /* init connection and backchannel */
2813 nfsd4_init_conn(rqstp, conn, new);
2814 nfsd4_put_session(new);
2819 spin_unlock(&nn->client_lock);
2824 __free_session(new);
2825 out_release_drc_mem:
2826 nfsd4_put_drc_mem(&cr_ses->fore_channel);
2830 static __be32 nfsd4_map_bcts_dir(u32 *dir)
2833 case NFS4_CDFC4_FORE:
2834 case NFS4_CDFC4_BACK:
2836 case NFS4_CDFC4_FORE_OR_BOTH:
2837 case NFS4_CDFC4_BACK_OR_BOTH:
2838 *dir = NFS4_CDFC4_BOTH;
2841 return nfserr_inval;
2844 __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
2846 struct nfsd4_session *session = cstate->session;
2847 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2850 status = nfsd4_check_cb_sec(&bc->bc_cb_sec);
2853 spin_lock(&nn->client_lock);
2854 session->se_cb_prog = bc->bc_cb_program;
2855 session->se_cb_sec = bc->bc_cb_sec;
2856 spin_unlock(&nn->client_lock);
2858 nfsd4_probe_callback(session->se_client);
2863 __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
2864 struct nfsd4_compound_state *cstate,
2865 struct nfsd4_bind_conn_to_session *bcts)
2868 struct nfsd4_conn *conn;
2869 struct nfsd4_session *session;
2870 struct net *net = SVC_NET(rqstp);
2871 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2873 if (!nfsd4_last_compound_op(rqstp))
2874 return nfserr_not_only_op;
2875 spin_lock(&nn->client_lock);
2876 session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status);
2877 spin_unlock(&nn->client_lock);
2879 goto out_no_session;
2880 status = nfserr_wrong_cred;
2881 if (!nfsd4_mach_creds_match(session->se_client, rqstp))
2883 status = nfsd4_map_bcts_dir(&bcts->dir);
2886 conn = alloc_conn(rqstp, bcts->dir);
2887 status = nfserr_jukebox;
2890 nfsd4_init_conn(rqstp, conn, session);
2893 nfsd4_put_session(session);
2898 static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
2902 return !memcmp(sid, &session->se_sessionid, sizeof(*sid));
2906 nfsd4_destroy_session(struct svc_rqst *r,
2907 struct nfsd4_compound_state *cstate,
2908 struct nfsd4_destroy_session *sessionid)
2910 struct nfsd4_session *ses;
2912 int ref_held_by_me = 0;
2913 struct net *net = SVC_NET(r);
2914 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
2916 status = nfserr_not_only_op;
2917 if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) {
2918 if (!nfsd4_last_compound_op(r))
2922 dump_sessionid(__func__, &sessionid->sessionid);
2923 spin_lock(&nn->client_lock);
2924 ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status);
2926 goto out_client_lock;
2927 status = nfserr_wrong_cred;
2928 if (!nfsd4_mach_creds_match(ses->se_client, r))
2929 goto out_put_session;
2930 status = mark_session_dead_locked(ses, 1 + ref_held_by_me);
2932 goto out_put_session;
2933 unhash_session(ses);
2934 spin_unlock(&nn->client_lock);
2936 nfsd4_probe_callback_sync(ses->se_client);
2938 spin_lock(&nn->client_lock);
2941 nfsd4_put_session_locked(ses);
2943 spin_unlock(&nn->client_lock);
2948 static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s)
2950 struct nfsd4_conn *c;
2952 list_for_each_entry(c, &s->se_conns, cn_persession) {
2953 if (c->cn_xprt == xpt) {
2960 static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses)
2962 struct nfs4_client *clp = ses->se_client;
2963 struct nfsd4_conn *c;
2964 __be32 status = nfs_ok;
2967 spin_lock(&clp->cl_lock);
2968 c = __nfsd4_find_conn(new->cn_xprt, ses);
2971 status = nfserr_conn_not_bound_to_session;
2972 if (clp->cl_mach_cred)
2974 __nfsd4_hash_conn(new, ses);
2975 spin_unlock(&clp->cl_lock);
2976 ret = nfsd4_register_conn(new);
2978 /* oops; xprt is already down: */
2979 nfsd4_conn_lost(&new->cn_xpt_user);
2982 spin_unlock(&clp->cl_lock);
2987 static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session)
2989 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2991 return args->opcnt > session->se_fchannel.maxops;
2994 static bool nfsd4_request_too_big(struct svc_rqst *rqstp,
2995 struct nfsd4_session *session)
2997 struct xdr_buf *xb = &rqstp->rq_arg;
2999 return xb->len > session->se_fchannel.maxreq_sz;
3003 nfsd4_sequence(struct svc_rqst *rqstp,
3004 struct nfsd4_compound_state *cstate,
3005 struct nfsd4_sequence *seq)
3007 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3008 struct xdr_stream *xdr = &resp->xdr;
3009 struct nfsd4_session *session;
3010 struct nfs4_client *clp;
3011 struct nfsd4_slot *slot;
3012 struct nfsd4_conn *conn;
3015 struct net *net = SVC_NET(rqstp);
3016 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
3018 if (resp->opcnt != 1)
3019 return nfserr_sequence_pos;
3022 * Will be either used or freed by nfsd4_sequence_check_conn
3025 conn = alloc_conn(rqstp, NFS4_CDFC4_FORE);
3027 return nfserr_jukebox;
3029 spin_lock(&nn->client_lock);
3030 session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status);
3032 goto out_no_session;
3033 clp = session->se_client;
3035 status = nfserr_too_many_ops;
3036 if (nfsd4_session_too_many_ops(rqstp, session))
3037 goto out_put_session;
3039 status = nfserr_req_too_big;
3040 if (nfsd4_request_too_big(rqstp, session))
3041 goto out_put_session;
3043 status = nfserr_badslot;
3044 if (seq->slotid >= session->se_fchannel.maxreqs)
3045 goto out_put_session;
3047 slot = session->se_slots[seq->slotid];
3048 dprintk("%s: slotid %d\n", __func__, seq->slotid);
3050 /* We do not negotiate the number of slots yet, so set the
3051 * maxslots to the session maxreqs which is used to encode
3052 * sr_highest_slotid and the sr_target_slot id to maxslots */
3053 seq->maxslots = session->se_fchannel.maxreqs;
3055 status = check_slot_seqid(seq->seqid, slot->sl_seqid,
3056 slot->sl_flags & NFSD4_SLOT_INUSE);
3057 if (status == nfserr_replay_cache) {
3058 status = nfserr_seq_misordered;
3059 if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED))
3060 goto out_put_session;
3061 cstate->slot = slot;
3062 cstate->session = session;
3064 /* Return the cached reply status and set cstate->status
3065 * for nfsd4_proc_compound processing */
3066 status = nfsd4_replay_cache_entry(resp, seq);
3067 cstate->status = nfserr_replay_cache;
3071 goto out_put_session;
3073 status = nfsd4_sequence_check_conn(conn, session);
3076 goto out_put_session;
3078 buflen = (seq->cachethis) ?
3079 session->se_fchannel.maxresp_cached :
3080 session->se_fchannel.maxresp_sz;
3081 status = (seq->cachethis) ? nfserr_rep_too_big_to_cache :
3083 if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack))
3084 goto out_put_session;
3085 svc_reserve(rqstp, buflen);
3088 /* Success! bump slot seqid */
3089 slot->sl_seqid = seq->seqid;
3090 slot->sl_flags |= NFSD4_SLOT_INUSE;
3092 slot->sl_flags |= NFSD4_SLOT_CACHETHIS;
3094 slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS;
3096 cstate->slot = slot;
3097 cstate->session = session;
3101 switch (clp->cl_cb_state) {
3103 seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
3105 case NFSD4_CB_FAULT:
3106 seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
3109 seq->status_flags = 0;
3111 if (!list_empty(&clp->cl_revoked))
3112 seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED;
3116 spin_unlock(&nn->client_lock);
3119 nfsd4_put_session_locked(session);
3120 goto out_no_session;
3124 nfsd4_sequence_done(struct nfsd4_compoundres *resp)
3126 struct nfsd4_compound_state *cs = &resp->cstate;
3128 if (nfsd4_has_session(cs)) {
3129 if (cs->status != nfserr_replay_cache) {
3130 nfsd4_store_cache_entry(resp);
3131 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3133 /* Drop session reference that was taken in nfsd4_sequence() */
3134 nfsd4_put_session(cs->session);
3136 put_client_renew(cs->clp);
3140 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
3142 struct nfs4_client *conf, *unconf;
3143 struct nfs4_client *clp = NULL;
3145 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3147 spin_lock(&nn->client_lock);
3148 unconf = find_unconfirmed_client(&dc->clientid, true, nn);
3149 conf = find_confirmed_client(&dc->clientid, true, nn);
3150 WARN_ON_ONCE(conf && unconf);
3153 if (client_has_state(conf)) {
3154 status = nfserr_clientid_busy;
3157 status = mark_client_expired_locked(conf);
3164 status = nfserr_stale_clientid;
3167 if (!nfsd4_mach_creds_match(clp, rqstp)) {
3169 status = nfserr_wrong_cred;
3172 unhash_client_locked(clp);
3174 spin_unlock(&nn->client_lock);
3181 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
3185 if (rc->rca_one_fs) {
3186 if (!cstate->current_fh.fh_dentry)
3187 return nfserr_nofilehandle;
3189 * We don't take advantage of the rca_one_fs case.
3190 * That's OK, it's optional, we can safely ignore it.
3195 status = nfserr_complete_already;
3196 if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
3197 &cstate->session->se_client->cl_flags))
3200 status = nfserr_stale_clientid;
3201 if (is_client_expired(cstate->session->se_client))
3203 * The following error isn't really legal.
3204 * But we only get here if the client just explicitly
3205 * destroyed the client. Surely it no longer cares what
3206 * error it gets back on an operation for the dead
3212 nfsd4_client_record_create(cstate->session->se_client);
3218 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
3219 struct nfsd4_setclientid *setclid)
3221 struct xdr_netobj clname = setclid->se_name;
3222 nfs4_verifier clverifier = setclid->se_verf;
3223 struct nfs4_client *conf, *new;
3224 struct nfs4_client *unconf = NULL;
3226 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3228 new = create_client(clname, rqstp, &clverifier);
3230 return nfserr_jukebox;
3231 /* Cases below refer to rfc 3530 section 14.2.33: */
3232 spin_lock(&nn->client_lock);
3233 conf = find_confirmed_client_by_name(&clname, nn);
3234 if (conf && client_has_state(conf)) {
3236 status = nfserr_clid_inuse;
3237 if (clp_used_exchangeid(conf))
3239 if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
3240 char addr_str[INET6_ADDRSTRLEN];
3241 rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str,
3243 dprintk("NFSD: setclientid: string in use by client "
3244 "at %s\n", addr_str);
3248 unconf = find_unconfirmed_client_by_name(&clname, nn);
3250 unhash_client_locked(unconf);
3251 if (conf && same_verf(&conf->cl_verifier, &clverifier)) {
3252 /* case 1: probable callback update */
3253 copy_clid(new, conf);
3254 gen_confirm(new, nn);
3255 } else /* case 4 (new client) or cases 2, 3 (client reboot): */
3257 new->cl_minorversion = 0;
3258 gen_callback(new, setclid, rqstp);
3259 add_to_unconfirmed(new);
3260 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
3261 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
3262 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
3266 spin_unlock(&nn->client_lock);
3270 expire_client(unconf);
3276 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
3277 struct nfsd4_compound_state *cstate,
3278 struct nfsd4_setclientid_confirm *setclientid_confirm)
3280 struct nfs4_client *conf, *unconf;
3281 struct nfs4_client *old = NULL;
3282 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
3283 clientid_t * clid = &setclientid_confirm->sc_clientid;
3285 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3287 if (STALE_CLIENTID(clid, nn))
3288 return nfserr_stale_clientid;
3290 spin_lock(&nn->client_lock);
3291 conf = find_confirmed_client(clid, false, nn);
3292 unconf = find_unconfirmed_client(clid, false, nn);
3294 * We try hard to give out unique clientid's, so if we get an
3295 * attempt to confirm the same clientid with a different cred,
3296 * the client may be buggy; this should never happen.
3298 * Nevertheless, RFC 7530 recommends INUSE for this case:
3300 status = nfserr_clid_inuse;
3301 if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
3303 if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
3305 /* cases below refer to rfc 3530 section 14.2.34: */
3306 if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
3307 if (conf && same_verf(&confirm, &conf->cl_confirm)) {
3308 /* case 2: probable retransmit */
3310 } else /* case 4: client hasn't noticed we rebooted yet? */
3311 status = nfserr_stale_clientid;
3315 if (conf) { /* case 1: callback update */
3317 unhash_client_locked(old);
3318 nfsd4_change_callback(conf, &unconf->cl_cb_conn);
3319 } else { /* case 3: normal case; new or rebooted client */
3320 old = find_confirmed_client_by_name(&unconf->cl_name, nn);
3322 status = nfserr_clid_inuse;
3323 if (client_has_state(old)
3324 && !same_creds(&unconf->cl_cred,
3327 status = mark_client_expired_locked(old);
3333 move_to_confirmed(unconf);
3336 get_client_locked(conf);
3337 spin_unlock(&nn->client_lock);
3338 nfsd4_probe_callback(conf);
3339 spin_lock(&nn->client_lock);
3340 put_client_renew_locked(conf);
3342 spin_unlock(&nn->client_lock);
3348 static struct nfs4_file *nfsd4_alloc_file(void)
3350 return kmem_cache_alloc(file_slab, GFP_KERNEL);
3353 /* OPEN Share state helper functions */
3354 static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
3355 struct nfs4_file *fp)
3357 lockdep_assert_held(&state_lock);
3359 atomic_set(&fp->fi_ref, 1);
3360 spin_lock_init(&fp->fi_lock);
3361 INIT_LIST_HEAD(&fp->fi_stateids);
3362 INIT_LIST_HEAD(&fp->fi_delegations);
3363 INIT_LIST_HEAD(&fp->fi_clnt_odstate);
3364 fh_copy_shallow(&fp->fi_fhandle, fh);
3365 fp->fi_deleg_file = NULL;
3366 fp->fi_had_conflict = false;
3367 fp->fi_share_deny = 0;
3368 memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
3369 memset(fp->fi_access, 0, sizeof(fp->fi_access));
3370 #ifdef CONFIG_NFSD_PNFS
3371 INIT_LIST_HEAD(&fp->fi_lo_states);
3372 atomic_set(&fp->fi_lo_recalls, 0);
3374 hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
3378 nfsd4_free_slabs(void)
3380 kmem_cache_destroy(odstate_slab);
3381 kmem_cache_destroy(openowner_slab);
3382 kmem_cache_destroy(lockowner_slab);
3383 kmem_cache_destroy(file_slab);
3384 kmem_cache_destroy(stateid_slab);
3385 kmem_cache_destroy(deleg_slab);
3389 nfsd4_init_slabs(void)
3391 openowner_slab = kmem_cache_create("nfsd4_openowners",
3392 sizeof(struct nfs4_openowner), 0, 0, NULL);
3393 if (openowner_slab == NULL)
3395 lockowner_slab = kmem_cache_create("nfsd4_lockowners",
3396 sizeof(struct nfs4_lockowner), 0, 0, NULL);
3397 if (lockowner_slab == NULL)
3398 goto out_free_openowner_slab;
3399 file_slab = kmem_cache_create("nfsd4_files",
3400 sizeof(struct nfs4_file), 0, 0, NULL);
3401 if (file_slab == NULL)
3402 goto out_free_lockowner_slab;
3403 stateid_slab = kmem_cache_create("nfsd4_stateids",
3404 sizeof(struct nfs4_ol_stateid), 0, 0, NULL);
3405 if (stateid_slab == NULL)
3406 goto out_free_file_slab;
3407 deleg_slab = kmem_cache_create("nfsd4_delegations",
3408 sizeof(struct nfs4_delegation), 0, 0, NULL);
3409 if (deleg_slab == NULL)
3410 goto out_free_stateid_slab;
3411 odstate_slab = kmem_cache_create("nfsd4_odstate",
3412 sizeof(struct nfs4_clnt_odstate), 0, 0, NULL);
3413 if (odstate_slab == NULL)
3414 goto out_free_deleg_slab;
3417 out_free_deleg_slab:
3418 kmem_cache_destroy(deleg_slab);
3419 out_free_stateid_slab:
3420 kmem_cache_destroy(stateid_slab);
3422 kmem_cache_destroy(file_slab);
3423 out_free_lockowner_slab:
3424 kmem_cache_destroy(lockowner_slab);
3425 out_free_openowner_slab:
3426 kmem_cache_destroy(openowner_slab);
3428 dprintk("nfsd4: out of memory while initializing nfsv4\n");
3432 static void init_nfs4_replay(struct nfs4_replay *rp)
3434 rp->rp_status = nfserr_serverfault;
3436 rp->rp_buf = rp->rp_ibuf;
3437 mutex_init(&rp->rp_mutex);
3440 static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate,
3441 struct nfs4_stateowner *so)
3443 if (!nfsd4_has_session(cstate)) {
3444 mutex_lock(&so->so_replay.rp_mutex);
3445 cstate->replay_owner = nfs4_get_stateowner(so);
3449 void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate)
3451 struct nfs4_stateowner *so = cstate->replay_owner;
3454 cstate->replay_owner = NULL;
3455 mutex_unlock(&so->so_replay.rp_mutex);
3456 nfs4_put_stateowner(so);
3460 static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp)
3462 struct nfs4_stateowner *sop;
3464 sop = kmem_cache_alloc(slab, GFP_KERNEL);
3468 sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
3469 if (!sop->so_owner.data) {
3470 kmem_cache_free(slab, sop);
3473 sop->so_owner.len = owner->len;
3475 INIT_LIST_HEAD(&sop->so_stateids);
3476 sop->so_client = clp;
3477 init_nfs4_replay(&sop->so_replay);
3478 atomic_set(&sop->so_count, 1);
3482 static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)
3484 lockdep_assert_held(&clp->cl_lock);
3486 list_add(&oo->oo_owner.so_strhash,
3487 &clp->cl_ownerstr_hashtbl[strhashval]);
3488 list_add(&oo->oo_perclient, &clp->cl_openowners);
3491 static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
3493 unhash_openowner_locked(openowner(so));
3496 static void nfs4_free_openowner(struct nfs4_stateowner *so)
3498 struct nfs4_openowner *oo = openowner(so);
3500 kmem_cache_free(openowner_slab, oo);
3503 static const struct nfs4_stateowner_operations openowner_ops = {
3504 .so_unhash = nfs4_unhash_openowner,
3505 .so_free = nfs4_free_openowner,
3508 static struct nfs4_ol_stateid *
3509 nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open)
3511 struct nfs4_ol_stateid *local, *ret = NULL;
3512 struct nfs4_openowner *oo = open->op_openowner;
3514 lockdep_assert_held(&fp->fi_lock);
3516 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
3517 /* ignore lock owners */
3518 if (local->st_stateowner->so_is_open_owner == 0)
3520 if (local->st_stateowner == &oo->oo_owner) {
3522 atomic_inc(&ret->st_stid.sc_count);
3529 static struct nfs4_openowner *
3530 alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open,
3531 struct nfsd4_compound_state *cstate)
3533 struct nfs4_client *clp = cstate->clp;
3534 struct nfs4_openowner *oo, *ret;
3536 oo = alloc_stateowner(openowner_slab, &open->op_owner, clp);
3539 oo->oo_owner.so_ops = &openowner_ops;
3540 oo->oo_owner.so_is_open_owner = 1;
3541 oo->oo_owner.so_seqid = open->op_seqid;
3543 if (nfsd4_has_session(cstate))
3544 oo->oo_flags |= NFS4_OO_CONFIRMED;
3546 oo->oo_last_closed_stid = NULL;
3547 INIT_LIST_HEAD(&oo->oo_close_lru);
3548 spin_lock(&clp->cl_lock);
3549 ret = find_openstateowner_str_locked(strhashval, open, clp);
3551 hash_openowner(oo, clp, strhashval);
3554 nfs4_free_stateowner(&oo->oo_owner);
3556 spin_unlock(&clp->cl_lock);
3560 static struct nfs4_ol_stateid *
3561 init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open)
3564 struct nfs4_openowner *oo = open->op_openowner;
3565 struct nfs4_ol_stateid *retstp = NULL;
3566 struct nfs4_ol_stateid *stp;
3569 /* We are moving these outside of the spinlocks to avoid the warnings */
3570 mutex_init(&stp->st_mutex);
3571 mutex_lock(&stp->st_mutex);
3573 spin_lock(&oo->oo_owner.so_client->cl_lock);
3574 spin_lock(&fp->fi_lock);
3576 retstp = nfsd4_find_existing_open(fp, open);
3580 open->op_stp = NULL;
3581 atomic_inc(&stp->st_stid.sc_count);
3582 stp->st_stid.sc_type = NFS4_OPEN_STID;
3583 INIT_LIST_HEAD(&stp->st_locks);
3584 stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner);
3586 stp->st_stid.sc_file = fp;
3587 stp->st_access_bmap = 0;
3588 stp->st_deny_bmap = 0;
3589 stp->st_openstp = NULL;
3590 list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
3591 list_add(&stp->st_perfile, &fp->fi_stateids);
3594 spin_unlock(&fp->fi_lock);
3595 spin_unlock(&oo->oo_owner.so_client->cl_lock);
3597 mutex_lock(&retstp->st_mutex);
3598 /* To keep mutex tracking happy */
3599 mutex_unlock(&stp->st_mutex);
3606 * In the 4.0 case we need to keep the owners around a little while to handle
3607 * CLOSE replay. We still do need to release any file access that is held by
3608 * them before returning however.
3611 move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
3613 struct nfs4_ol_stateid *last;
3614 struct nfs4_openowner *oo = openowner(s->st_stateowner);
3615 struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net,
3618 dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo);
3621 * We know that we hold one reference via nfsd4_close, and another
3622 * "persistent" reference for the client. If the refcount is higher
3623 * than 2, then there are still calls in progress that are using this
3624 * stateid. We can't put the sc_file reference until they are finished.
3625 * Wait for the refcount to drop to 2. Since it has been unhashed,
3626 * there should be no danger of the refcount going back up again at
3629 wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2);
3631 release_all_access(s);
3632 if (s->st_stid.sc_file) {
3633 put_nfs4_file(s->st_stid.sc_file);
3634 s->st_stid.sc_file = NULL;
3637 spin_lock(&nn->client_lock);
3638 last = oo->oo_last_closed_stid;
3639 oo->oo_last_closed_stid = s;
3640 list_move_tail(&oo->oo_close_lru, &nn->close_lru);
3641 oo->oo_time = get_seconds();
3642 spin_unlock(&nn->client_lock);
3644 nfs4_put_stid(&last->st_stid);
3647 /* search file_hashtbl[] for file */
3648 static struct nfs4_file *
3649 find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
3651 struct nfs4_file *fp;
3653 hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
3654 if (fh_match(&fp->fi_fhandle, fh)) {
3655 if (atomic_inc_not_zero(&fp->fi_ref))
3663 find_file(struct knfsd_fh *fh)
3665 struct nfs4_file *fp;
3666 unsigned int hashval = file_hashval(fh);
3669 fp = find_file_locked(fh, hashval);
3674 static struct nfs4_file *
3675 find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
3677 struct nfs4_file *fp;
3678 unsigned int hashval = file_hashval(fh);
3681 fp = find_file_locked(fh, hashval);
3686 spin_lock(&state_lock);
3687 fp = find_file_locked(fh, hashval);
3688 if (likely(fp == NULL)) {
3689 nfsd4_init_file(fh, hashval, new);
3692 spin_unlock(&state_lock);
3698 * Called to check deny when READ with all zero stateid or
3699 * WRITE with all zero or all one stateid
3702 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
3704 struct nfs4_file *fp;
3705 __be32 ret = nfs_ok;
3707 fp = find_file(¤t_fh->fh_handle);
3710 /* Check for conflicting share reservations */
3711 spin_lock(&fp->fi_lock);
3712 if (fp->fi_share_deny & deny_type)
3713 ret = nfserr_locked;
3714 spin_unlock(&fp->fi_lock);
3719 static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
3721 struct nfs4_delegation *dp = cb_to_delegation(cb);
3722 struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net,
3725 block_delegations(&dp->dl_stid.sc_file->fi_fhandle);
3728 * We can't do this in nfsd_break_deleg_cb because it is
3729 * already holding inode->i_lock.
3731 * If the dl_time != 0, then we know that it has already been
3732 * queued for a lease break. Don't queue it again.
3734 spin_lock(&state_lock);
3735 if (dp->dl_time == 0) {
3736 dp->dl_time = get_seconds();
3737 list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru);
3739 spin_unlock(&state_lock);
3742 static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
3743 struct rpc_task *task)
3745 struct nfs4_delegation *dp = cb_to_delegation(cb);
3747 if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID)
3750 switch (task->tk_status) {
3754 case -NFS4ERR_BAD_STATEID:
3756 * Race: client probably got cb_recall before open reply
3757 * granting delegation.
3759 if (dp->dl_retries--) {
3760 rpc_delay(task, 2 * HZ);
3769 static void nfsd4_cb_recall_release(struct nfsd4_callback *cb)
3771 struct nfs4_delegation *dp = cb_to_delegation(cb);
3773 nfs4_put_stid(&dp->dl_stid);
3776 static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = {
3777 .prepare = nfsd4_cb_recall_prepare,
3778 .done = nfsd4_cb_recall_done,
3779 .release = nfsd4_cb_recall_release,
3782 static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
3785 * We're assuming the state code never drops its reference
3786 * without first removing the lease. Since we're in this lease
3787 * callback (and since the lease code is serialized by the kernel
3788 * lock) we know the server hasn't removed the lease yet, we know
3789 * it's safe to take a reference.
3791 atomic_inc(&dp->dl_stid.sc_count);
3792 nfsd4_run_cb(&dp->dl_recall);
3795 /* Called from break_lease() with i_lock held. */
3797 nfsd_break_deleg_cb(struct file_lock *fl)
3800 struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner;
3801 struct nfs4_delegation *dp;
3804 WARN(1, "(%p)->fl_owner NULL\n", fl);
3807 if (fp->fi_had_conflict) {
3808 WARN(1, "duplicate break on %p\n", fp);
3812 * We don't want the locks code to timeout the lease for us;
3813 * we'll remove it ourself if a delegation isn't returned
3816 fl->fl_break_time = 0;
3818 spin_lock(&fp->fi_lock);
3819 fp->fi_had_conflict = true;
3821 * If there are no delegations on the list, then return true
3822 * so that the lease code will go ahead and delete it.
3824 if (list_empty(&fp->fi_delegations))
3827 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile)
3828 nfsd_break_one_deleg(dp);
3829 spin_unlock(&fp->fi_lock);
3834 nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
3835 struct list_head *dispose)
3838 return lease_modify(onlist, arg, dispose);
3843 static const struct lock_manager_operations nfsd_lease_mng_ops = {
3844 .lm_break = nfsd_break_deleg_cb,
3845 .lm_change = nfsd_change_deleg_cb,
3848 static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid)
3850 if (nfsd4_has_session(cstate))
3852 if (seqid == so->so_seqid - 1)
3853 return nfserr_replay_me;
3854 if (seqid == so->so_seqid)
3856 return nfserr_bad_seqid;
3859 static __be32 lookup_clientid(clientid_t *clid,
3860 struct nfsd4_compound_state *cstate,
3861 struct nfsd_net *nn)
3863 struct nfs4_client *found;
3866 found = cstate->clp;
3867 if (!same_clid(&found->cl_clientid, clid))
3868 return nfserr_stale_clientid;
3872 if (STALE_CLIENTID(clid, nn))
3873 return nfserr_stale_clientid;
3876 * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
3877 * cached already then we know this is for is for v4.0 and "sessions"
3880 WARN_ON_ONCE(cstate->session);
3881 spin_lock(&nn->client_lock);
3882 found = find_confirmed_client(clid, false, nn);
3884 spin_unlock(&nn->client_lock);
3885 return nfserr_expired;
3887 atomic_inc(&found->cl_refcount);
3888 spin_unlock(&nn->client_lock);
3890 /* Cache the nfs4_client in cstate! */
3891 cstate->clp = found;
3896 nfsd4_process_open1(struct nfsd4_compound_state *cstate,
3897 struct nfsd4_open *open, struct nfsd_net *nn)
3899 clientid_t *clientid = &open->op_clientid;
3900 struct nfs4_client *clp = NULL;
3901 unsigned int strhashval;
3902 struct nfs4_openowner *oo = NULL;
3905 if (STALE_CLIENTID(&open->op_clientid, nn))
3906 return nfserr_stale_clientid;
3908 * In case we need it later, after we've already created the
3909 * file and don't want to risk a further failure:
3911 open->op_file = nfsd4_alloc_file();
3912 if (open->op_file == NULL)
3913 return nfserr_jukebox;
3915 status = lookup_clientid(clientid, cstate, nn);
3920 strhashval = ownerstr_hashval(&open->op_owner);
3921 oo = find_openstateowner_str(strhashval, open, clp);
3922 open->op_openowner = oo;
3926 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
3927 /* Replace unconfirmed owners without checking for replay. */
3928 release_openowner(oo);
3929 open->op_openowner = NULL;
3932 status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
3937 oo = alloc_init_open_stateowner(strhashval, open, cstate);
3939 return nfserr_jukebox;
3940 open->op_openowner = oo;
3942 open->op_stp = nfs4_alloc_open_stateid(clp);
3944 return nfserr_jukebox;
3946 if (nfsd4_has_session(cstate) &&
3947 (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) {
3948 open->op_odstate = alloc_clnt_odstate(clp);
3949 if (!open->op_odstate)
3950 return nfserr_jukebox;
3956 static inline __be32
3957 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
3959 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
3960 return nfserr_openmode;
3965 static int share_access_to_flags(u32 share_access)
3967 return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE;
3970 static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s)
3972 struct nfs4_stid *ret;
3974 ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
3977 return delegstateid(ret);
3980 static bool nfsd4_is_deleg_cur(struct nfsd4_open *open)
3982 return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
3983 open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH;
3987 nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
3988 struct nfs4_delegation **dp)
3991 __be32 status = nfserr_bad_stateid;
3992 struct nfs4_delegation *deleg;
3994 deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
3997 flags = share_access_to_flags(open->op_share_access);
3998 status = nfs4_check_delegmode(deleg, flags);
4000 nfs4_put_stid(&deleg->dl_stid);
4005 if (!nfsd4_is_deleg_cur(open))
4009 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4013 static inline int nfs4_access_to_access(u32 nfs4_access)
4017 if (nfs4_access & NFS4_SHARE_ACCESS_READ)
4018 flags |= NFSD_MAY_READ;
4019 if (nfs4_access & NFS4_SHARE_ACCESS_WRITE)
4020 flags |= NFSD_MAY_WRITE;
4024 static inline __be32
4025 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
4026 struct nfsd4_open *open)
4028 struct iattr iattr = {
4029 .ia_valid = ATTR_SIZE,
4032 if (!open->op_truncate)
4034 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
4035 return nfserr_inval;
4036 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
4039 static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
4040 struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
4041 struct nfsd4_open *open)
4043 struct file *filp = NULL;
4045 int oflag = nfs4_access_to_omode(open->op_share_access);
4046 int access = nfs4_access_to_access(open->op_share_access);
4047 unsigned char old_access_bmap, old_deny_bmap;
4049 spin_lock(&fp->fi_lock);
4052 * Are we trying to set a deny mode that would conflict with
4055 status = nfs4_file_check_deny(fp, open->op_share_deny);
4056 if (status != nfs_ok) {
4057 spin_unlock(&fp->fi_lock);
4061 /* set access to the file */
4062 status = nfs4_file_get_access(fp, open->op_share_access);
4063 if (status != nfs_ok) {
4064 spin_unlock(&fp->fi_lock);
4068 /* Set access bits in stateid */
4069 old_access_bmap = stp->st_access_bmap;
4070 set_access(open->op_share_access, stp);
4072 /* Set new deny mask */
4073 old_deny_bmap = stp->st_deny_bmap;
4074 set_deny(open->op_share_deny, stp);
4075 fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4077 if (!fp->fi_fds[oflag]) {
4078 spin_unlock(&fp->fi_lock);
4079 status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp);
4081 goto out_put_access;
4082 spin_lock(&fp->fi_lock);
4083 if (!fp->fi_fds[oflag]) {
4084 fp->fi_fds[oflag] = filp;
4088 spin_unlock(&fp->fi_lock);
4092 status = nfsd4_truncate(rqstp, cur_fh, open);
4094 goto out_put_access;
4098 stp->st_access_bmap = old_access_bmap;
4099 nfs4_file_put_access(fp, open->op_share_access);
4100 reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
4105 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)
4108 unsigned char old_deny_bmap = stp->st_deny_bmap;
4110 if (!test_access(open->op_share_access, stp))
4111 return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
4113 /* test and set deny mode */
4114 spin_lock(&fp->fi_lock);
4115 status = nfs4_file_check_deny(fp, open->op_share_deny);
4116 if (status == nfs_ok) {
4117 set_deny(open->op_share_deny, stp);
4118 fp->fi_share_deny |=
4119 (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
4121 spin_unlock(&fp->fi_lock);
4123 if (status != nfs_ok)
4126 status = nfsd4_truncate(rqstp, cur_fh, open);
4127 if (status != nfs_ok)
4128 reset_union_bmap_deny(old_deny_bmap, stp);
4132 /* Should we give out recallable state?: */
4133 static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
4135 if (clp->cl_cb_state == NFSD4_CB_UP)
4138 * In the sessions case, since we don't have to establish a
4139 * separate connection for callbacks, we assume it's OK
4140 * until we hear otherwise:
4142 return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
4145 static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag)
4147 struct file_lock *fl;
4149 fl = locks_alloc_lock();
4152 fl->fl_lmops = &nfsd_lease_mng_ops;
4153 fl->fl_flags = FL_DELEG;
4154 fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK;
4155 fl->fl_end = OFFSET_MAX;
4156 fl->fl_owner = (fl_owner_t)fp;
4157 fl->fl_pid = current->tgid;
4162 * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer
4163 * @dp: a pointer to the nfs4_delegation we're adding.
4166 * On success: Return code will be 0 on success.
4168 * On error: -EAGAIN if there was an existing delegation.
4169 * nonzero if there is an error in other cases.
4173 static int nfs4_setlease(struct nfs4_delegation *dp)
4175 struct nfs4_file *fp = dp->dl_stid.sc_file;
4176 struct file_lock *fl;
4180 fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ);
4183 filp = find_readable_file(fp);
4185 /* We should always have a readable file here */
4187 locks_free_lock(fl);
4191 status = vfs_setlease(filp, fl->fl_type, &fl, NULL);
4193 locks_free_lock(fl);
4196 spin_lock(&state_lock);
4197 spin_lock(&fp->fi_lock);
4198 /* Did the lease get broken before we took the lock? */
4200 if (fp->fi_had_conflict)
4203 if (fp->fi_deleg_file) {
4204 status = hash_delegation_locked(dp, fp);
4207 fp->fi_deleg_file = filp;
4208 fp->fi_delegees = 0;
4209 status = hash_delegation_locked(dp, fp);
4210 spin_unlock(&fp->fi_lock);
4211 spin_unlock(&state_lock);
4213 /* Should never happen, this is a new fi_deleg_file */
4219 spin_unlock(&fp->fi_lock);
4220 spin_unlock(&state_lock);
4226 static struct nfs4_delegation *
4227 nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
4228 struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
4231 struct nfs4_delegation *dp;
4233 if (fp->fi_had_conflict)
4234 return ERR_PTR(-EAGAIN);
4236 spin_lock(&state_lock);
4237 spin_lock(&fp->fi_lock);
4238 status = nfs4_get_existing_delegation(clp, fp);
4239 spin_unlock(&fp->fi_lock);
4240 spin_unlock(&state_lock);
4243 return ERR_PTR(status);
4245 dp = alloc_init_deleg(clp, fh, odstate);
4247 return ERR_PTR(-ENOMEM);
4250 spin_lock(&state_lock);
4251 spin_lock(&fp->fi_lock);
4252 dp->dl_stid.sc_file = fp;
4253 if (!fp->fi_deleg_file) {
4254 spin_unlock(&fp->fi_lock);
4255 spin_unlock(&state_lock);
4256 status = nfs4_setlease(dp);
4259 if (fp->fi_had_conflict) {
4263 status = hash_delegation_locked(dp, fp);
4265 spin_unlock(&fp->fi_lock);
4266 spin_unlock(&state_lock);
4269 put_clnt_odstate(dp->dl_clnt_odstate);
4270 nfs4_put_stid(&dp->dl_stid);
4271 return ERR_PTR(status);
4276 static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
4278 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4279 if (status == -EAGAIN)
4280 open->op_why_no_deleg = WND4_CONTENTION;
4282 open->op_why_no_deleg = WND4_RESOURCE;
4283 switch (open->op_deleg_want) {
4284 case NFS4_SHARE_WANT_READ_DELEG:
4285 case NFS4_SHARE_WANT_WRITE_DELEG:
4286 case NFS4_SHARE_WANT_ANY_DELEG:
4288 case NFS4_SHARE_WANT_CANCEL:
4289 open->op_why_no_deleg = WND4_CANCELLED;
4291 case NFS4_SHARE_WANT_NO_DELEG:
4298 * Attempt to hand out a delegation.
4300 * Note we don't support write delegations, and won't until the vfs has
4301 * proper support for them.
4304 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
4305 struct nfs4_ol_stateid *stp)
4307 struct nfs4_delegation *dp;
4308 struct nfs4_openowner *oo = openowner(stp->st_stateowner);
4309 struct nfs4_client *clp = stp->st_stid.sc_client;
4313 cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
4314 open->op_recall = 0;
4315 switch (open->op_claim_type) {
4316 case NFS4_OPEN_CLAIM_PREVIOUS:
4318 open->op_recall = 1;
4319 if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ)
4322 case NFS4_OPEN_CLAIM_NULL:
4323 case NFS4_OPEN_CLAIM_FH:
4325 * Let's not give out any delegations till everyone's
4326 * had the chance to reclaim theirs, *and* until
4327 * NLM locks have all been reclaimed:
4329 if (locks_in_grace(clp->net))
4331 if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
4334 * Also, if the file was opened for write or
4335 * create, there's a good chance the client's
4336 * about to write to it, resulting in an
4337 * immediate recall (since we don't support
4338 * write delegations):
4340 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
4342 if (open->op_create == NFS4_OPEN_CREATE)
4348 dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
4352 memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid));
4354 dprintk("NFSD: delegation stateid=" STATEID_FMT "\n",
4355 STATEID_VAL(&dp->dl_stid.sc_stateid));
4356 open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
4357 nfs4_put_stid(&dp->dl_stid);
4360 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE;
4361 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS &&
4362 open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) {
4363 dprintk("NFSD: WARNING: refusing delegation reclaim\n");
4364 open->op_recall = 1;
4367 /* 4.1 client asking for a delegation? */
4368 if (open->op_deleg_want)
4369 nfsd4_open_deleg_none_ext(open, status);
4373 static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
4374 struct nfs4_delegation *dp)
4376 if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG &&
4377 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4378 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4379 open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE;
4380 } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG &&
4381 dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) {
4382 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4383 open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE;
4385 /* Otherwise the client must be confused wanting a delegation
4386 * it already has, therefore we don't return
4387 * NFS4_OPEN_DELEGATE_NONE_EXT and reason.
4392 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
4394 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4395 struct nfs4_client *cl = open->op_openowner->oo_owner.so_client;
4396 struct nfs4_file *fp = NULL;
4397 struct nfs4_ol_stateid *stp = NULL;
4398 struct nfs4_delegation *dp = NULL;
4402 * Lookup file; if found, lookup stateid and check open request,
4403 * and check for delegations in the process of being recalled.
4404 * If not found, create the nfs4_file struct
4406 fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle);
4407 if (fp != open->op_file) {
4408 status = nfs4_check_deleg(cl, open, &dp);
4411 spin_lock(&fp->fi_lock);
4412 stp = nfsd4_find_existing_open(fp, open);
4413 spin_unlock(&fp->fi_lock);
4415 open->op_file = NULL;
4416 status = nfserr_bad_stateid;
4417 if (nfsd4_is_deleg_cur(open))
4422 * OPEN the file, or upgrade an existing OPEN.
4423 * If truncate fails, the OPEN fails.
4426 /* Stateid was found, this is an OPEN upgrade */
4427 mutex_lock(&stp->st_mutex);
4428 status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open);
4430 mutex_unlock(&stp->st_mutex);
4434 /* stp is returned locked. */
4435 stp = init_open_stateid(fp, open);
4436 /* See if we lost the race to some other thread */
4437 if (stp->st_access_bmap != 0) {
4438 status = nfs4_upgrade_open(rqstp, fp, current_fh,
4441 mutex_unlock(&stp->st_mutex);
4446 status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
4448 mutex_unlock(&stp->st_mutex);
4449 release_open_stateid(stp);
4453 stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp,
4455 if (stp->st_clnt_odstate == open->op_odstate)
4456 open->op_odstate = NULL;
4459 nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid);
4460 mutex_unlock(&stp->st_mutex);
4462 if (nfsd4_has_session(&resp->cstate)) {
4463 if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) {
4464 open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT;
4465 open->op_why_no_deleg = WND4_NOT_WANTED;
4471 * Attempt to hand out a delegation. No error return, because the
4472 * OPEN succeeds even if we fail.
4474 nfs4_open_delegation(current_fh, open, stp);
4478 dprintk("%s: stateid=" STATEID_FMT "\n", __func__,
4479 STATEID_VAL(&stp->st_stid.sc_stateid));
4481 /* 4.1 client trying to upgrade/downgrade delegation? */
4482 if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp &&
4483 open->op_deleg_want)
4484 nfsd4_deleg_xgrade_none_ext(open, dp);
4488 if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
4489 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
4491 * To finish the open response, we just need to set the rflags.
4493 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
4494 if (nfsd4_has_session(&resp->cstate))
4495 open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK;
4496 else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED))
4497 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
4500 nfs4_put_stid(&dp->dl_stid);
4502 nfs4_put_stid(&stp->st_stid);
4507 void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
4508 struct nfsd4_open *open)
4510 if (open->op_openowner) {
4511 struct nfs4_stateowner *so = &open->op_openowner->oo_owner;
4513 nfsd4_cstate_assign_replay(cstate, so);
4514 nfs4_put_stateowner(so);
4517 kmem_cache_free(file_slab, open->op_file);
4519 nfs4_put_stid(&open->op_stp->st_stid);
4520 if (open->op_odstate)
4521 kmem_cache_free(odstate_slab, open->op_odstate);
4525 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
4528 struct nfs4_client *clp;
4530 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4532 dprintk("process_renew(%08x/%08x): starting\n",
4533 clid->cl_boot, clid->cl_id);
4534 status = lookup_clientid(clid, cstate, nn);
4538 status = nfserr_cb_path_down;
4539 if (!list_empty(&clp->cl_delegations)
4540 && clp->cl_cb_state != NFSD4_CB_UP)
4548 nfsd4_end_grace(struct nfsd_net *nn)
4550 /* do nothing if grace period already ended */
4551 if (nn->grace_ended)
4554 dprintk("NFSD: end of grace period\n");
4555 nn->grace_ended = true;
4557 * If the server goes down again right now, an NFSv4
4558 * client will still be allowed to reclaim after it comes back up,
4559 * even if it hasn't yet had a chance to reclaim state this time.
4562 nfsd4_record_grace_done(nn);
4564 * At this point, NFSv4 clients can still reclaim. But if the
4565 * server crashes, any that have not yet reclaimed will be out
4566 * of luck on the next boot.
4568 * (NFSv4.1+ clients are considered to have reclaimed once they
4569 * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
4570 * have reclaimed after their first OPEN.)
4572 locks_end_grace(&nn->nfsd4_manager);
4574 * At this point, and once lockd and/or any other containers
4575 * exit their grace period, further reclaims will fail and
4576 * regular locking can resume.
4581 nfs4_laundromat(struct nfsd_net *nn)
4583 struct nfs4_client *clp;
4584 struct nfs4_openowner *oo;
4585 struct nfs4_delegation *dp;
4586 struct nfs4_ol_stateid *stp;
4587 struct nfsd4_blocked_lock *nbl;
4588 struct list_head *pos, *next, reaplist;
4589 time_t cutoff = get_seconds() - nn->nfsd4_lease;
4590 time_t t, new_timeo = nn->nfsd4_lease;
4592 dprintk("NFSD: laundromat service - starting\n");
4593 nfsd4_end_grace(nn);
4594 INIT_LIST_HEAD(&reaplist);
4595 spin_lock(&nn->client_lock);
4596 list_for_each_safe(pos, next, &nn->client_lru) {
4597 clp = list_entry(pos, struct nfs4_client, cl_lru);
4598 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
4599 t = clp->cl_time - cutoff;
4600 new_timeo = min(new_timeo, t);
4603 if (mark_client_expired_locked(clp)) {
4604 dprintk("NFSD: client in use (clientid %08x)\n",
4605 clp->cl_clientid.cl_id);
4608 list_add(&clp->cl_lru, &reaplist);
4610 spin_unlock(&nn->client_lock);
4611 list_for_each_safe(pos, next, &reaplist) {
4612 clp = list_entry(pos, struct nfs4_client, cl_lru);
4613 dprintk("NFSD: purging unused client (clientid %08x)\n",
4614 clp->cl_clientid.cl_id);
4615 list_del_init(&clp->cl_lru);
4618 spin_lock(&state_lock);
4619 list_for_each_safe(pos, next, &nn->del_recall_lru) {
4620 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
4621 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
4622 t = dp->dl_time - cutoff;
4623 new_timeo = min(new_timeo, t);
4626 WARN_ON(!unhash_delegation_locked(dp));
4627 list_add(&dp->dl_recall_lru, &reaplist);
4629 spin_unlock(&state_lock);
4630 while (!list_empty(&reaplist)) {
4631 dp = list_first_entry(&reaplist, struct nfs4_delegation,
4633 list_del_init(&dp->dl_recall_lru);
4634 revoke_delegation(dp);
4637 spin_lock(&nn->client_lock);
4638 while (!list_empty(&nn->close_lru)) {
4639 oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
4641 if (time_after((unsigned long)oo->oo_time,
4642 (unsigned long)cutoff)) {
4643 t = oo->oo_time - cutoff;
4644 new_timeo = min(new_timeo, t);
4647 list_del_init(&oo->oo_close_lru);
4648 stp = oo->oo_last_closed_stid;
4649 oo->oo_last_closed_stid = NULL;
4650 spin_unlock(&nn->client_lock);
4651 nfs4_put_stid(&stp->st_stid);
4652 spin_lock(&nn->client_lock);
4654 spin_unlock(&nn->client_lock);
4657 * It's possible for a client to try and acquire an already held lock
4658 * that is being held for a long time, and then lose interest in it.
4659 * So, we clean out any un-revisited request after a lease period
4660 * under the assumption that the client is no longer interested.
4662 * RFC5661, sec. 9.6 states that the client must not rely on getting
4663 * notifications and must continue to poll for locks, even when the
4664 * server supports them. Thus this shouldn't lead to clients blocking
4665 * indefinitely once the lock does become free.
4667 BUG_ON(!list_empty(&reaplist));
4668 spin_lock(&nn->client_lock);
4669 while (!list_empty(&nn->blocked_locks_lru)) {
4670 nbl = list_first_entry(&nn->blocked_locks_lru,
4671 struct nfsd4_blocked_lock, nbl_lru);
4672 if (time_after((unsigned long)nbl->nbl_time,
4673 (unsigned long)cutoff)) {
4674 t = nbl->nbl_time - cutoff;
4675 new_timeo = min(new_timeo, t);
4678 list_move(&nbl->nbl_lru, &reaplist);
4679 list_del_init(&nbl->nbl_list);
4681 spin_unlock(&nn->client_lock);
4683 while (!list_empty(&reaplist)) {
4684 nbl = list_first_entry(&nn->blocked_locks_lru,
4685 struct nfsd4_blocked_lock, nbl_lru);
4686 list_del_init(&nbl->nbl_lru);
4687 posix_unblock_lock(&nbl->nbl_lock);
4688 free_blocked_lock(nbl);
4691 new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
4695 static struct workqueue_struct *laundry_wq;
4696 static void laundromat_main(struct work_struct *);
4699 laundromat_main(struct work_struct *laundry)
4702 struct delayed_work *dwork = to_delayed_work(laundry);
4703 struct nfsd_net *nn = container_of(dwork, struct nfsd_net,
4706 t = nfs4_laundromat(nn);
4707 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
4708 queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
4711 static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
4713 if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
4714 return nfserr_bad_stateid;
4719 access_permit_read(struct nfs4_ol_stateid *stp)
4721 return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
4722 test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
4723 test_access(NFS4_SHARE_ACCESS_WRITE, stp);
4727 access_permit_write(struct nfs4_ol_stateid *stp)
4729 return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
4730 test_access(NFS4_SHARE_ACCESS_BOTH, stp);
4734 __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags)
4736 __be32 status = nfserr_openmode;
4738 /* For lock stateid's, we test the parent open, not the lock: */
4739 if (stp->st_openstp)
4740 stp = stp->st_openstp;
4741 if ((flags & WR_STATE) && !access_permit_write(stp))
4743 if ((flags & RD_STATE) && !access_permit_read(stp))
4750 static inline __be32
4751 check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags)
4753 if (ONE_STATEID(stateid) && (flags & RD_STATE))
4755 else if (opens_in_grace(net)) {
4756 /* Answer in remaining cases depends on existence of
4757 * conflicting state; so we must wait out the grace period. */
4758 return nfserr_grace;
4759 } else if (flags & WR_STATE)
4760 return nfs4_share_conflict(current_fh,
4761 NFS4_SHARE_DENY_WRITE);
4762 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
4763 return nfs4_share_conflict(current_fh,
4764 NFS4_SHARE_DENY_READ);
4768 * Allow READ/WRITE during grace period on recovered state only for files
4769 * that are not able to provide mandatory locking.
4772 grace_disallows_io(struct net *net, struct inode *inode)
4774 return opens_in_grace(net) && mandatory_lock(inode);
4777 static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
4780 * When sessions are used the stateid generation number is ignored
4783 if (has_session && in->si_generation == 0)
4786 if (in->si_generation == ref->si_generation)
4789 /* If the client sends us a stateid from the future, it's buggy: */
4790 if (nfsd4_stateid_generation_after(in, ref))
4791 return nfserr_bad_stateid;
4793 * However, we could see a stateid from the past, even from a
4794 * non-buggy client. For example, if the client sends a lock
4795 * while some IO is outstanding, the lock may bump si_generation
4796 * while the IO is still in flight. The client could avoid that
4797 * situation by waiting for responses on all the IO requests,
4798 * but better performance may result in retrying IO that
4799 * receives an old_stateid error if requests are rarely
4800 * reordered in flight:
4802 return nfserr_old_stateid;
4805 static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
4807 if (ols->st_stateowner->so_is_open_owner &&
4808 !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
4809 return nfserr_bad_stateid;
4813 static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
4815 struct nfs4_stid *s;
4816 __be32 status = nfserr_bad_stateid;
4818 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4820 /* Client debugging aid. */
4821 if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) {
4822 char addr_str[INET6_ADDRSTRLEN];
4823 rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str,
4825 pr_warn_ratelimited("NFSD: client %s testing state ID "
4826 "with incorrect client ID\n", addr_str);
4829 spin_lock(&cl->cl_lock);
4830 s = find_stateid_locked(cl, stateid);
4833 status = check_stateid_generation(stateid, &s->sc_stateid, 1);
4836 switch (s->sc_type) {
4837 case NFS4_DELEG_STID:
4840 case NFS4_REVOKED_DELEG_STID:
4841 status = nfserr_deleg_revoked;
4843 case NFS4_OPEN_STID:
4844 case NFS4_LOCK_STID:
4845 status = nfsd4_check_openowner_confirmed(openlockstateid(s));
4848 printk("unknown stateid type %x\n", s->sc_type);
4850 case NFS4_CLOSED_STID:
4851 case NFS4_CLOSED_DELEG_STID:
4852 status = nfserr_bad_stateid;
4855 spin_unlock(&cl->cl_lock);
4860 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
4861 stateid_t *stateid, unsigned char typemask,
4862 struct nfs4_stid **s, struct nfsd_net *nn)
4866 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
4867 return nfserr_bad_stateid;
4868 status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn);
4869 if (status == nfserr_stale_clientid) {
4870 if (cstate->session)
4871 return nfserr_bad_stateid;
4872 return nfserr_stale_stateid;
4876 *s = find_stateid_by_type(cstate->clp, stateid, typemask);
4878 return nfserr_bad_stateid;
4882 static struct file *
4883 nfs4_find_file(struct nfs4_stid *s, int flags)
4888 switch (s->sc_type) {
4889 case NFS4_DELEG_STID:
4890 if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file))
4892 return get_file(s->sc_file->fi_deleg_file);
4893 case NFS4_OPEN_STID:
4894 case NFS4_LOCK_STID:
4895 if (flags & RD_STATE)
4896 return find_readable_file(s->sc_file);
4898 return find_writeable_file(s->sc_file);
4906 nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags)
4910 status = nfsd4_check_openowner_confirmed(ols);
4913 return nfs4_check_openmode(ols, flags);
4917 nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
4918 struct file **filpp, bool *tmp_file, int flags)
4920 int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE;
4924 file = nfs4_find_file(s, flags);
4926 status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
4927 acc | NFSD_MAY_OWNER_OVERRIDE);
4935 status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp);
4947 * Checks for stateid operations
4950 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
4951 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
4952 stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file)
4954 struct inode *ino = d_inode(fhp->fh_dentry);
4955 struct net *net = SVC_NET(rqstp);
4956 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
4957 struct nfs4_stid *s = NULL;
4965 if (grace_disallows_io(net, ino))
4966 return nfserr_grace;
4968 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
4969 status = check_special_stateids(net, fhp, stateid, flags);
4973 status = nfsd4_lookup_stateid(cstate, stateid,
4974 NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
4978 status = check_stateid_generation(stateid, &s->sc_stateid,
4979 nfsd4_has_session(cstate));
4983 switch (s->sc_type) {
4984 case NFS4_DELEG_STID:
4985 status = nfs4_check_delegmode(delegstateid(s), flags);
4987 case NFS4_OPEN_STID:
4988 case NFS4_LOCK_STID:
4989 status = nfs4_check_olstateid(fhp, openlockstateid(s), flags);
4992 status = nfserr_bad_stateid;
4997 status = nfs4_check_fh(fhp, s);
5000 if (!status && filpp)
5001 status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags);
5009 * Test if the stateid is valid
5012 nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5013 struct nfsd4_test_stateid *test_stateid)
5015 struct nfsd4_test_stateid_id *stateid;
5016 struct nfs4_client *cl = cstate->session->se_client;
5018 list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
5019 stateid->ts_id_status =
5020 nfsd4_validate_stateid(cl, &stateid->ts_id_stateid);
5026 nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s)
5028 struct nfs4_ol_stateid *stp = openlockstateid(s);
5031 mutex_lock(&stp->st_mutex);
5033 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5037 ret = nfserr_locks_held;
5038 if (check_for_locks(stp->st_stid.sc_file,
5039 lockowner(stp->st_stateowner)))
5042 release_lock_stateid(stp);
5046 mutex_unlock(&stp->st_mutex);
5052 nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5053 struct nfsd4_free_stateid *free_stateid)
5055 stateid_t *stateid = &free_stateid->fr_stateid;
5056 struct nfs4_stid *s;
5057 struct nfs4_delegation *dp;
5058 struct nfs4_client *cl = cstate->session->se_client;
5059 __be32 ret = nfserr_bad_stateid;
5061 spin_lock(&cl->cl_lock);
5062 s = find_stateid_locked(cl, stateid);
5065 switch (s->sc_type) {
5066 case NFS4_DELEG_STID:
5067 ret = nfserr_locks_held;
5069 case NFS4_OPEN_STID:
5070 ret = check_stateid_generation(stateid, &s->sc_stateid, 1);
5073 ret = nfserr_locks_held;
5075 case NFS4_LOCK_STID:
5076 atomic_inc(&s->sc_count);
5077 spin_unlock(&cl->cl_lock);
5078 ret = nfsd4_free_lock_stateid(stateid, s);
5080 case NFS4_REVOKED_DELEG_STID:
5081 dp = delegstateid(s);
5082 list_del_init(&dp->dl_recall_lru);
5083 spin_unlock(&cl->cl_lock);
5087 /* Default falls through and returns nfserr_bad_stateid */
5090 spin_unlock(&cl->cl_lock);
5098 return (type == NFS4_READW_LT || type == NFS4_READ_LT) ?
5099 RD_STATE : WR_STATE;
5102 static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp)
5104 struct svc_fh *current_fh = &cstate->current_fh;
5105 struct nfs4_stateowner *sop = stp->st_stateowner;
5108 status = nfsd4_check_seqid(cstate, sop, seqid);
5111 if (stp->st_stid.sc_type == NFS4_CLOSED_STID
5112 || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID)
5114 * "Closed" stateid's exist *only* to return
5115 * nfserr_replay_me from the previous step, and
5116 * revoked delegations are kept only for free_stateid.
5118 return nfserr_bad_stateid;
5119 mutex_lock(&stp->st_mutex);
5120 status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate));
5121 if (status == nfs_ok)
5122 status = nfs4_check_fh(current_fh, &stp->st_stid);
5123 if (status != nfs_ok)
5124 mutex_unlock(&stp->st_mutex);
5129 * Checks for sequence id mutating operations.
5132 nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5133 stateid_t *stateid, char typemask,
5134 struct nfs4_ol_stateid **stpp,
5135 struct nfsd_net *nn)
5138 struct nfs4_stid *s;
5139 struct nfs4_ol_stateid *stp = NULL;
5141 dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
5142 seqid, STATEID_VAL(stateid));
5145 status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
5148 stp = openlockstateid(s);
5149 nfsd4_cstate_assign_replay(cstate, stp->st_stateowner);
5151 status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp);
5155 nfs4_put_stid(&stp->st_stid);
5159 static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
5160 stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn)
5163 struct nfs4_openowner *oo;
5164 struct nfs4_ol_stateid *stp;
5166 status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
5167 NFS4_OPEN_STID, &stp, nn);
5170 oo = openowner(stp->st_stateowner);
5171 if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) {
5172 mutex_unlock(&stp->st_mutex);
5173 nfs4_put_stid(&stp->st_stid);
5174 return nfserr_bad_stateid;
5181 nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5182 struct nfsd4_open_confirm *oc)
5185 struct nfs4_openowner *oo;
5186 struct nfs4_ol_stateid *stp;
5187 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5189 dprintk("NFSD: nfsd4_open_confirm on file %pd\n",
5190 cstate->current_fh.fh_dentry);
5192 status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0);
5196 status = nfs4_preprocess_seqid_op(cstate,
5197 oc->oc_seqid, &oc->oc_req_stateid,
5198 NFS4_OPEN_STID, &stp, nn);
5201 oo = openowner(stp->st_stateowner);
5202 status = nfserr_bad_stateid;
5203 if (oo->oo_flags & NFS4_OO_CONFIRMED) {
5204 mutex_unlock(&stp->st_mutex);
5207 oo->oo_flags |= NFS4_OO_CONFIRMED;
5208 nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid);
5209 mutex_unlock(&stp->st_mutex);
5210 dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n",
5211 __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid));
5213 nfsd4_client_record_create(oo->oo_owner.so_client);
5216 nfs4_put_stid(&stp->st_stid);
5218 nfsd4_bump_seqid(cstate, status);
5222 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
5224 if (!test_access(access, stp))
5226 nfs4_file_put_access(stp->st_stid.sc_file, access);
5227 clear_access(access, stp);
5230 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
5232 switch (to_access) {
5233 case NFS4_SHARE_ACCESS_READ:
5234 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE);
5235 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5237 case NFS4_SHARE_ACCESS_WRITE:
5238 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ);
5239 nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH);
5241 case NFS4_SHARE_ACCESS_BOTH:
5249 nfsd4_open_downgrade(struct svc_rqst *rqstp,
5250 struct nfsd4_compound_state *cstate,
5251 struct nfsd4_open_downgrade *od)
5254 struct nfs4_ol_stateid *stp;
5255 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5257 dprintk("NFSD: nfsd4_open_downgrade on file %pd\n",
5258 cstate->current_fh.fh_dentry);
5260 /* We don't yet support WANT bits: */
5261 if (od->od_deleg_want)
5262 dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__,
5265 status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
5266 &od->od_stateid, &stp, nn);
5269 status = nfserr_inval;
5270 if (!test_access(od->od_share_access, stp)) {
5271 dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n",
5272 stp->st_access_bmap, od->od_share_access);
5275 if (!test_deny(od->od_share_deny, stp)) {
5276 dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n",
5277 stp->st_deny_bmap, od->od_share_deny);
5280 nfs4_stateid_downgrade(stp, od->od_share_access);
5281 reset_union_bmap_deny(od->od_share_deny, stp);
5282 nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid);
5285 mutex_unlock(&stp->st_mutex);
5286 nfs4_put_stid(&stp->st_stid);
5288 nfsd4_bump_seqid(cstate, status);
5292 static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
5294 struct nfs4_client *clp = s->st_stid.sc_client;
5296 LIST_HEAD(reaplist);
5298 s->st_stid.sc_type = NFS4_CLOSED_STID;
5299 spin_lock(&clp->cl_lock);
5300 unhashed = unhash_open_stateid(s, &reaplist);
5302 if (clp->cl_minorversion) {
5304 put_ol_stateid_locked(s, &reaplist);
5305 spin_unlock(&clp->cl_lock);
5306 free_ol_stateid_reaplist(&reaplist);
5308 spin_unlock(&clp->cl_lock);
5309 free_ol_stateid_reaplist(&reaplist);
5311 move_to_close_lru(s, clp->net);
5316 * nfs4_unlock_state() called after encode
5319 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5320 struct nfsd4_close *close)
5323 struct nfs4_ol_stateid *stp;
5324 struct net *net = SVC_NET(rqstp);
5325 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5327 dprintk("NFSD: nfsd4_close on file %pd\n",
5328 cstate->current_fh.fh_dentry);
5330 status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
5332 NFS4_OPEN_STID|NFS4_CLOSED_STID,
5334 nfsd4_bump_seqid(cstate, status);
5337 nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid);
5338 mutex_unlock(&stp->st_mutex);
5340 nfsd4_close_open_stateid(stp);
5342 /* put reference from nfs4_preprocess_seqid_op */
5343 nfs4_put_stid(&stp->st_stid);
5349 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5350 struct nfsd4_delegreturn *dr)
5352 struct nfs4_delegation *dp;
5353 stateid_t *stateid = &dr->dr_stateid;
5354 struct nfs4_stid *s;
5356 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5358 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
5361 status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
5364 dp = delegstateid(s);
5365 status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate));
5369 destroy_delegation(dp);
5371 nfs4_put_stid(&dp->dl_stid);
5377 end_offset(u64 start, u64 len)
5382 return end >= start ? end: NFS4_MAX_UINT64;
5385 /* last octet in a range */
5387 last_byte_offset(u64 start, u64 len)
5393 return end > start ? end - 1: NFS4_MAX_UINT64;
5397 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
5398 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
5399 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
5400 * locking, this prevents us from being completely protocol-compliant. The
5401 * real solution to this problem is to start using unsigned file offsets in
5402 * the VFS, but this is a very deep change!
5405 nfs4_transform_lock_offset(struct file_lock *lock)
5407 if (lock->fl_start < 0)
5408 lock->fl_start = OFFSET_MAX;
5409 if (lock->fl_end < 0)
5410 lock->fl_end = OFFSET_MAX;
5414 nfsd4_fl_get_owner(fl_owner_t owner)
5416 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5418 nfs4_get_stateowner(&lo->lo_owner);
5423 nfsd4_fl_put_owner(fl_owner_t owner)
5425 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
5428 nfs4_put_stateowner(&lo->lo_owner);
5432 nfsd4_lm_notify(struct file_lock *fl)
5434 struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner;
5435 struct net *net = lo->lo_owner.so_client->net;
5436 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5437 struct nfsd4_blocked_lock *nbl = container_of(fl,
5438 struct nfsd4_blocked_lock, nbl_lock);
5441 /* An empty list means that something else is going to be using it */
5442 spin_lock(&nn->client_lock);
5443 if (!list_empty(&nbl->nbl_list)) {
5444 list_del_init(&nbl->nbl_list);
5445 list_del_init(&nbl->nbl_lru);
5448 spin_unlock(&nn->client_lock);
5451 nfsd4_run_cb(&nbl->nbl_cb);
5454 static const struct lock_manager_operations nfsd_posix_mng_ops = {
5455 .lm_notify = nfsd4_lm_notify,
5456 .lm_get_owner = nfsd4_fl_get_owner,
5457 .lm_put_owner = nfsd4_fl_put_owner,
5461 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
5463 struct nfs4_lockowner *lo;
5465 if (fl->fl_lmops == &nfsd_posix_mng_ops) {
5466 lo = (struct nfs4_lockowner *) fl->fl_owner;
5467 deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
5468 lo->lo_owner.so_owner.len, GFP_KERNEL);
5469 if (!deny->ld_owner.data)
5470 /* We just don't care that much */
5472 deny->ld_owner.len = lo->lo_owner.so_owner.len;
5473 deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
5476 deny->ld_owner.len = 0;
5477 deny->ld_owner.data = NULL;
5478 deny->ld_clientid.cl_boot = 0;
5479 deny->ld_clientid.cl_id = 0;
5481 deny->ld_start = fl->fl_start;
5482 deny->ld_length = NFS4_MAX_UINT64;
5483 if (fl->fl_end != NFS4_MAX_UINT64)
5484 deny->ld_length = fl->fl_end - fl->fl_start + 1;
5485 deny->ld_type = NFS4_READ_LT;
5486 if (fl->fl_type != F_RDLCK)
5487 deny->ld_type = NFS4_WRITE_LT;
5490 static struct nfs4_lockowner *
5491 find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner)
5493 unsigned int strhashval = ownerstr_hashval(owner);
5494 struct nfs4_stateowner *so;
5496 lockdep_assert_held(&clp->cl_lock);
5498 list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval],
5500 if (so->so_is_open_owner)
5502 if (same_owner_str(so, owner))
5503 return lockowner(nfs4_get_stateowner(so));
5508 static struct nfs4_lockowner *
5509 find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner)
5511 struct nfs4_lockowner *lo;
5513 spin_lock(&clp->cl_lock);
5514 lo = find_lockowner_str_locked(clp, owner);
5515 spin_unlock(&clp->cl_lock);
5519 static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
5521 unhash_lockowner_locked(lockowner(sop));
5524 static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
5526 struct nfs4_lockowner *lo = lockowner(sop);
5528 kmem_cache_free(lockowner_slab, lo);
5531 static const struct nfs4_stateowner_operations lockowner_ops = {
5532 .so_unhash = nfs4_unhash_lockowner,
5533 .so_free = nfs4_free_lockowner,
5537 * Alloc a lock owner structure.
5538 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
5541 * strhashval = ownerstr_hashval
5543 static struct nfs4_lockowner *
5544 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp,
5545 struct nfs4_ol_stateid *open_stp,
5546 struct nfsd4_lock *lock)
5548 struct nfs4_lockowner *lo, *ret;
5550 lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp);
5553 INIT_LIST_HEAD(&lo->lo_blocked);
5554 INIT_LIST_HEAD(&lo->lo_owner.so_stateids);
5555 lo->lo_owner.so_is_open_owner = 0;
5556 lo->lo_owner.so_seqid = lock->lk_new_lock_seqid;
5557 lo->lo_owner.so_ops = &lockowner_ops;
5558 spin_lock(&clp->cl_lock);
5559 ret = find_lockowner_str_locked(clp, &lock->lk_new_owner);
5561 list_add(&lo->lo_owner.so_strhash,
5562 &clp->cl_ownerstr_hashtbl[strhashval]);
5565 nfs4_free_stateowner(&lo->lo_owner);
5567 spin_unlock(&clp->cl_lock);
5572 init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
5573 struct nfs4_file *fp, struct inode *inode,
5574 struct nfs4_ol_stateid *open_stp)
5576 struct nfs4_client *clp = lo->lo_owner.so_client;
5578 lockdep_assert_held(&clp->cl_lock);
5580 atomic_inc(&stp->st_stid.sc_count);
5581 stp->st_stid.sc_type = NFS4_LOCK_STID;
5582 stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner);
5584 stp->st_stid.sc_file = fp;
5585 stp->st_stid.sc_free = nfs4_free_lock_stateid;
5586 stp->st_access_bmap = 0;
5587 stp->st_deny_bmap = open_stp->st_deny_bmap;
5588 stp->st_openstp = open_stp;
5589 mutex_init(&stp->st_mutex);
5590 list_add(&stp->st_locks, &open_stp->st_locks);
5591 list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
5592 spin_lock(&fp->fi_lock);
5593 list_add(&stp->st_perfile, &fp->fi_stateids);
5594 spin_unlock(&fp->fi_lock);
5597 static struct nfs4_ol_stateid *
5598 find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
5600 struct nfs4_ol_stateid *lst;
5601 struct nfs4_client *clp = lo->lo_owner.so_client;
5603 lockdep_assert_held(&clp->cl_lock);
5605 list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) {
5606 if (lst->st_stid.sc_file == fp) {
5607 atomic_inc(&lst->st_stid.sc_count);
5614 static struct nfs4_ol_stateid *
5615 find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
5616 struct inode *inode, struct nfs4_ol_stateid *ost,
5619 struct nfs4_stid *ns = NULL;
5620 struct nfs4_ol_stateid *lst;
5621 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5622 struct nfs4_client *clp = oo->oo_owner.so_client;
5624 spin_lock(&clp->cl_lock);
5625 lst = find_lock_stateid(lo, fi);
5627 spin_unlock(&clp->cl_lock);
5628 ns = nfs4_alloc_stid(clp, stateid_slab);
5632 spin_lock(&clp->cl_lock);
5633 lst = find_lock_stateid(lo, fi);
5635 lst = openlockstateid(ns);
5636 init_lock_stateid(lst, lo, fi, inode, ost);
5641 spin_unlock(&clp->cl_lock);
5648 check_lock_length(u64 offset, u64 length)
5650 return ((length == 0) || ((length != NFS4_MAX_UINT64) &&
5651 (length > ~offset)));
5654 static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access)
5656 struct nfs4_file *fp = lock_stp->st_stid.sc_file;
5658 lockdep_assert_held(&fp->fi_lock);
5660 if (test_access(access, lock_stp))
5662 __nfs4_file_get_access(fp, access);
5663 set_access(access, lock_stp);
5667 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
5668 struct nfs4_ol_stateid *ost,
5669 struct nfsd4_lock *lock,
5670 struct nfs4_ol_stateid **plst, bool *new)
5673 struct nfs4_file *fi = ost->st_stid.sc_file;
5674 struct nfs4_openowner *oo = openowner(ost->st_stateowner);
5675 struct nfs4_client *cl = oo->oo_owner.so_client;
5676 struct inode *inode = d_inode(cstate->current_fh.fh_dentry);
5677 struct nfs4_lockowner *lo;
5678 struct nfs4_ol_stateid *lst;
5679 unsigned int strhashval;
5682 lo = find_lockowner_str(cl, &lock->lk_new_owner);
5684 strhashval = ownerstr_hashval(&lock->lk_new_owner);
5685 lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);
5687 return nfserr_jukebox;
5689 /* with an existing lockowner, seqids must be the same */
5690 status = nfserr_bad_seqid;
5691 if (!cstate->minorversion &&
5692 lock->lk_new_lock_seqid != lo->lo_owner.so_seqid)
5697 lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
5699 status = nfserr_jukebox;
5703 mutex_lock(&lst->st_mutex);
5705 /* See if it's still hashed to avoid race with FREE_STATEID */
5706 spin_lock(&cl->cl_lock);
5707 hashed = !list_empty(&lst->st_perfile);
5708 spin_unlock(&cl->cl_lock);
5711 mutex_unlock(&lst->st_mutex);
5712 nfs4_put_stid(&lst->st_stid);
5718 nfs4_put_stateowner(&lo->lo_owner);
5726 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5727 struct nfsd4_lock *lock)
5729 struct nfs4_openowner *open_sop = NULL;
5730 struct nfs4_lockowner *lock_sop = NULL;
5731 struct nfs4_ol_stateid *lock_stp = NULL;
5732 struct nfs4_ol_stateid *open_stp = NULL;
5733 struct nfs4_file *fp;
5734 struct file *filp = NULL;
5735 struct nfsd4_blocked_lock *nbl = NULL;
5736 struct file_lock *file_lock = NULL;
5737 struct file_lock *conflock = NULL;
5742 unsigned char fl_type;
5743 unsigned int fl_flags = FL_POSIX;
5744 struct net *net = SVC_NET(rqstp);
5745 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
5747 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
5748 (long long) lock->lk_offset,
5749 (long long) lock->lk_length);
5751 if (check_lock_length(lock->lk_offset, lock->lk_length))
5752 return nfserr_inval;
5754 if ((status = fh_verify(rqstp, &cstate->current_fh,
5755 S_IFREG, NFSD_MAY_LOCK))) {
5756 dprintk("NFSD: nfsd4_lock: permission denied!\n");
5760 if (lock->lk_is_new) {
5761 if (nfsd4_has_session(cstate))
5762 /* See rfc 5661 18.10.3: given clientid is ignored: */
5763 memcpy(&lock->lk_new_clientid,
5764 &cstate->session->se_client->cl_clientid,
5765 sizeof(clientid_t));
5767 status = nfserr_stale_clientid;
5768 if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
5771 /* validate and update open stateid and open seqid */
5772 status = nfs4_preprocess_confirmed_seqid_op(cstate,
5773 lock->lk_new_open_seqid,
5774 &lock->lk_new_open_stateid,
5778 mutex_unlock(&open_stp->st_mutex);
5779 open_sop = openowner(open_stp->st_stateowner);
5780 status = nfserr_bad_stateid;
5781 if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid,
5782 &lock->lk_new_clientid))
5784 status = lookup_or_create_lock_state(cstate, open_stp, lock,
5787 status = nfs4_preprocess_seqid_op(cstate,
5788 lock->lk_old_lock_seqid,
5789 &lock->lk_old_lock_stateid,
5790 NFS4_LOCK_STID, &lock_stp, nn);
5794 lock_sop = lockowner(lock_stp->st_stateowner);
5796 lkflg = setlkflg(lock->lk_type);
5797 status = nfs4_check_openmode(lock_stp, lkflg);
5801 status = nfserr_grace;
5802 if (locks_in_grace(net) && !lock->lk_reclaim)
5804 status = nfserr_no_grace;
5805 if (!locks_in_grace(net) && lock->lk_reclaim)
5808 fp = lock_stp->st_stid.sc_file;
5809 switch (lock->lk_type) {
5811 if (nfsd4_has_session(cstate))
5812 fl_flags |= FL_SLEEP;
5815 spin_lock(&fp->fi_lock);
5816 filp = find_readable_file_locked(fp);
5818 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ);
5819 spin_unlock(&fp->fi_lock);
5822 case NFS4_WRITEW_LT:
5823 if (nfsd4_has_session(cstate))
5824 fl_flags |= FL_SLEEP;
5827 spin_lock(&fp->fi_lock);
5828 filp = find_writeable_file_locked(fp);
5830 get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE);
5831 spin_unlock(&fp->fi_lock);
5835 status = nfserr_inval;
5840 status = nfserr_openmode;
5844 nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
5846 dprintk("NFSD: %s: unable to allocate block!\n", __func__);
5847 status = nfserr_jukebox;
5851 file_lock = &nbl->nbl_lock;
5852 file_lock->fl_type = fl_type;
5853 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner));
5854 file_lock->fl_pid = current->tgid;
5855 file_lock->fl_file = filp;
5856 file_lock->fl_flags = fl_flags;
5857 file_lock->fl_lmops = &nfsd_posix_mng_ops;
5858 file_lock->fl_start = lock->lk_offset;
5859 file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length);
5860 nfs4_transform_lock_offset(file_lock);
5862 conflock = locks_alloc_lock();
5864 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5865 status = nfserr_jukebox;
5869 if (fl_flags & FL_SLEEP) {
5870 nbl->nbl_time = jiffies;
5871 spin_lock(&nn->client_lock);
5872 list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
5873 list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
5874 spin_unlock(&nn->client_lock);
5877 err = vfs_lock_file(filp, F_SETLK, file_lock, conflock);
5879 case 0: /* success! */
5880 nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid);
5883 case FILE_LOCK_DEFERRED:
5886 case -EAGAIN: /* conflock holds conflicting lock */
5887 status = nfserr_denied;
5888 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
5889 nfs4_set_lock_denied(conflock, &lock->lk_denied);
5892 status = nfserr_deadlock;
5895 dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err);
5896 status = nfserrno(err);
5901 /* dequeue it if we queued it before */
5902 if (fl_flags & FL_SLEEP) {
5903 spin_lock(&nn->client_lock);
5904 list_del_init(&nbl->nbl_list);
5905 list_del_init(&nbl->nbl_lru);
5906 spin_unlock(&nn->client_lock);
5908 free_blocked_lock(nbl);
5913 /* Bump seqid manually if the 4.0 replay owner is openowner */
5914 if (cstate->replay_owner &&
5915 cstate->replay_owner != &lock_sop->lo_owner &&
5916 seqid_mutating_err(ntohl(status)))
5917 lock_sop->lo_owner.so_seqid++;
5919 mutex_unlock(&lock_stp->st_mutex);
5922 * If this is a new, never-before-used stateid, and we are
5923 * returning an error, then just go ahead and release it.
5926 release_lock_stateid(lock_stp);
5928 nfs4_put_stid(&lock_stp->st_stid);
5931 nfs4_put_stid(&open_stp->st_stid);
5932 nfsd4_bump_seqid(cstate, status);
5934 locks_free_lock(conflock);
5939 * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN,
5940 * so we do a temporary open here just to get an open file to pass to
5941 * vfs_test_lock. (Arguably perhaps test_lock should be done with an
5944 static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
5947 __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file);
5949 err = nfserrno(vfs_test_lock(file, lock));
5959 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5960 struct nfsd4_lockt *lockt)
5962 struct file_lock *file_lock = NULL;
5963 struct nfs4_lockowner *lo = NULL;
5965 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
5967 if (locks_in_grace(SVC_NET(rqstp)))
5968 return nfserr_grace;
5970 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
5971 return nfserr_inval;
5973 if (!nfsd4_has_session(cstate)) {
5974 status = lookup_clientid(&lockt->lt_clientid, cstate, nn);
5979 if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
5982 file_lock = locks_alloc_lock();
5984 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
5985 status = nfserr_jukebox;
5989 switch (lockt->lt_type) {
5992 file_lock->fl_type = F_RDLCK;
5995 case NFS4_WRITEW_LT:
5996 file_lock->fl_type = F_WRLCK;
5999 dprintk("NFSD: nfs4_lockt: bad lock type!\n");
6000 status = nfserr_inval;
6004 lo = find_lockowner_str(cstate->clp, &lockt->lt_owner);
6006 file_lock->fl_owner = (fl_owner_t)lo;
6007 file_lock->fl_pid = current->tgid;
6008 file_lock->fl_flags = FL_POSIX;
6010 file_lock->fl_start = lockt->lt_offset;
6011 file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length);
6013 nfs4_transform_lock_offset(file_lock);
6015 status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock);
6019 if (file_lock->fl_type != F_UNLCK) {
6020 status = nfserr_denied;
6021 nfs4_set_lock_denied(file_lock, &lockt->lt_denied);
6025 nfs4_put_stateowner(&lo->lo_owner);
6027 locks_free_lock(file_lock);
6032 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
6033 struct nfsd4_locku *locku)
6035 struct nfs4_ol_stateid *stp;
6036 struct file *filp = NULL;
6037 struct file_lock *file_lock = NULL;
6040 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6042 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
6043 (long long) locku->lu_offset,
6044 (long long) locku->lu_length);
6046 if (check_lock_length(locku->lu_offset, locku->lu_length))
6047 return nfserr_inval;
6049 status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid,
6050 &locku->lu_stateid, NFS4_LOCK_STID,
6054 filp = find_any_file(stp->st_stid.sc_file);
6056 status = nfserr_lock_range;
6059 file_lock = locks_alloc_lock();
6061 dprintk("NFSD: %s: unable to allocate lock!\n", __func__);
6062 status = nfserr_jukebox;
6066 file_lock->fl_type = F_UNLCK;
6067 file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner));
6068 file_lock->fl_pid = current->tgid;
6069 file_lock->fl_file = filp;
6070 file_lock->fl_flags = FL_POSIX;
6071 file_lock->fl_lmops = &nfsd_posix_mng_ops;
6072 file_lock->fl_start = locku->lu_offset;
6074 file_lock->fl_end = last_byte_offset(locku->lu_offset,
6076 nfs4_transform_lock_offset(file_lock);
6078 err = vfs_lock_file(filp, F_SETLK, file_lock, NULL);
6080 dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n");
6083 nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid);
6087 mutex_unlock(&stp->st_mutex);
6088 nfs4_put_stid(&stp->st_stid);
6090 nfsd4_bump_seqid(cstate, status);
6092 locks_free_lock(file_lock);
6096 status = nfserrno(err);
6102 * true: locks held by lockowner
6103 * false: no locks held by lockowner
6106 check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
6108 struct file_lock *fl;
6110 struct file *filp = find_any_file(fp);
6111 struct inode *inode;
6112 struct file_lock_context *flctx;
6115 /* Any valid lock stateid should have some sort of access */
6120 inode = file_inode(filp);
6121 flctx = inode->i_flctx;
6123 if (flctx && !list_empty_careful(&flctx->flc_posix)) {
6124 spin_lock(&flctx->flc_lock);
6125 list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
6126 if (fl->fl_owner == (fl_owner_t)lowner) {
6131 spin_unlock(&flctx->flc_lock);
6138 nfsd4_release_lockowner(struct svc_rqst *rqstp,
6139 struct nfsd4_compound_state *cstate,
6140 struct nfsd4_release_lockowner *rlockowner)
6142 clientid_t *clid = &rlockowner->rl_clientid;
6143 struct nfs4_stateowner *sop;
6144 struct nfs4_lockowner *lo = NULL;
6145 struct nfs4_ol_stateid *stp;
6146 struct xdr_netobj *owner = &rlockowner->rl_owner;
6147 unsigned int hashval = ownerstr_hashval(owner);
6149 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
6150 struct nfs4_client *clp;
6151 LIST_HEAD (reaplist);
6153 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
6154 clid->cl_boot, clid->cl_id);
6156 status = lookup_clientid(clid, cstate, nn);
6161 /* Find the matching lock stateowner */
6162 spin_lock(&clp->cl_lock);
6163 list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
6166 if (sop->so_is_open_owner || !same_owner_str(sop, owner))
6169 /* see if there are still any locks associated with it */
6170 lo = lockowner(sop);
6171 list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
6172 if (check_for_locks(stp->st_stid.sc_file, lo)) {
6173 status = nfserr_locks_held;
6174 spin_unlock(&clp->cl_lock);
6179 nfs4_get_stateowner(sop);
6183 spin_unlock(&clp->cl_lock);
6187 unhash_lockowner_locked(lo);
6188 while (!list_empty(&lo->lo_owner.so_stateids)) {
6189 stp = list_first_entry(&lo->lo_owner.so_stateids,
6190 struct nfs4_ol_stateid,
6192 WARN_ON(!unhash_lock_stateid(stp));
6193 put_ol_stateid_locked(stp, &reaplist);
6195 spin_unlock(&clp->cl_lock);
6196 free_ol_stateid_reaplist(&reaplist);
6197 nfs4_put_stateowner(&lo->lo_owner);
6202 static inline struct nfs4_client_reclaim *
6205 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
6209 nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
6211 struct nfs4_client_reclaim *crp;
6213 crp = nfsd4_find_reclaim_client(name, nn);
6214 return (crp && crp->cr_clp);
6218 * failure => all reset bets are off, nfserr_no_grace...
6220 struct nfs4_client_reclaim *
6221 nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
6223 unsigned int strhashval;
6224 struct nfs4_client_reclaim *crp;
6226 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
6227 crp = alloc_reclaim();
6229 strhashval = clientstr_hashval(name);
6230 INIT_LIST_HEAD(&crp->cr_strhash);
6231 list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
6232 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
6234 nn->reclaim_str_hashtbl_size++;
6240 nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
6242 list_del(&crp->cr_strhash);
6244 nn->reclaim_str_hashtbl_size--;
6248 nfs4_release_reclaim(struct nfsd_net *nn)
6250 struct nfs4_client_reclaim *crp = NULL;
6253 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6254 while (!list_empty(&nn->reclaim_str_hashtbl[i])) {
6255 crp = list_entry(nn->reclaim_str_hashtbl[i].next,
6256 struct nfs4_client_reclaim, cr_strhash);
6257 nfs4_remove_reclaim_record(crp, nn);
6260 WARN_ON_ONCE(nn->reclaim_str_hashtbl_size);
6264 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
6265 struct nfs4_client_reclaim *
6266 nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
6268 unsigned int strhashval;
6269 struct nfs4_client_reclaim *crp = NULL;
6271 dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
6273 strhashval = clientstr_hashval(recdir);
6274 list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
6275 if (same_name(crp->cr_recdir, recdir)) {
6283 * Called from OPEN. Look for clientid in reclaim list.
6286 nfs4_check_open_reclaim(clientid_t *clid,
6287 struct nfsd4_compound_state *cstate,
6288 struct nfsd_net *nn)
6292 /* find clientid in conf_id_hashtbl */
6293 status = lookup_clientid(clid, cstate, nn);
6295 return nfserr_reclaim_bad;
6297 if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
6298 return nfserr_no_grace;
6300 if (nfsd4_client_record_check(cstate->clp))
6301 return nfserr_reclaim_bad;
6306 #ifdef CONFIG_NFSD_FAULT_INJECTION
6308 put_client(struct nfs4_client *clp)
6310 atomic_dec(&clp->cl_refcount);
6313 static struct nfs4_client *
6314 nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size)
6316 struct nfs4_client *clp;
6317 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6320 if (!nfsd_netns_ready(nn))
6323 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6324 if (memcmp(&clp->cl_addr, addr, addr_size) == 0)
6331 nfsd_inject_print_clients(void)
6333 struct nfs4_client *clp;
6335 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6337 char buf[INET6_ADDRSTRLEN];
6339 if (!nfsd_netns_ready(nn))
6342 spin_lock(&nn->client_lock);
6343 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6344 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
6345 pr_info("NFS Client: %s\n", buf);
6348 spin_unlock(&nn->client_lock);
6354 nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size)
6357 struct nfs4_client *clp;
6358 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6361 if (!nfsd_netns_ready(nn))
6364 spin_lock(&nn->client_lock);
6365 clp = nfsd_find_client(addr, addr_size);
6367 if (mark_client_expired_locked(clp) == nfs_ok)
6372 spin_unlock(&nn->client_lock);
6381 nfsd_inject_forget_clients(u64 max)
6384 struct nfs4_client *clp, *next;
6385 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6387 LIST_HEAD(reaplist);
6389 if (!nfsd_netns_ready(nn))
6392 spin_lock(&nn->client_lock);
6393 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6394 if (mark_client_expired_locked(clp) == nfs_ok) {
6395 list_add(&clp->cl_lru, &reaplist);
6396 if (max != 0 && ++count >= max)
6400 spin_unlock(&nn->client_lock);
6402 list_for_each_entry_safe(clp, next, &reaplist, cl_lru)
6408 static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
6411 char buf[INET6_ADDRSTRLEN];
6412 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
6413 printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
6417 nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
6418 struct list_head *collect)
6420 struct nfs4_client *clp = lst->st_stid.sc_client;
6421 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6427 lockdep_assert_held(&nn->client_lock);
6428 atomic_inc(&clp->cl_refcount);
6429 list_add(&lst->st_locks, collect);
6432 static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
6433 struct list_head *collect,
6434 bool (*func)(struct nfs4_ol_stateid *))
6436 struct nfs4_openowner *oop;
6437 struct nfs4_ol_stateid *stp, *st_next;
6438 struct nfs4_ol_stateid *lst, *lst_next;
6441 spin_lock(&clp->cl_lock);
6442 list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
6443 list_for_each_entry_safe(stp, st_next,
6444 &oop->oo_owner.so_stateids, st_perstateowner) {
6445 list_for_each_entry_safe(lst, lst_next,
6446 &stp->st_locks, st_locks) {
6449 nfsd_inject_add_lock_to_list(lst,
6454 * Despite the fact that these functions deal
6455 * with 64-bit integers for "count", we must
6456 * ensure that it doesn't blow up the
6457 * clp->cl_refcount. Throw a warning if we
6458 * start to approach INT_MAX here.
6460 WARN_ON_ONCE(count == (INT_MAX / 2));
6467 spin_unlock(&clp->cl_lock);
6473 nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect,
6476 return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid);
6480 nfsd_print_client_locks(struct nfs4_client *clp)
6482 u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL);
6483 nfsd_print_count(clp, count, "locked files");
6488 nfsd_inject_print_locks(void)
6490 struct nfs4_client *clp;
6492 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6495 if (!nfsd_netns_ready(nn))
6498 spin_lock(&nn->client_lock);
6499 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6500 count += nfsd_print_client_locks(clp);
6501 spin_unlock(&nn->client_lock);
6507 nfsd_reap_locks(struct list_head *reaplist)
6509 struct nfs4_client *clp;
6510 struct nfs4_ol_stateid *stp, *next;
6512 list_for_each_entry_safe(stp, next, reaplist, st_locks) {
6513 list_del_init(&stp->st_locks);
6514 clp = stp->st_stid.sc_client;
6515 nfs4_put_stid(&stp->st_stid);
6521 nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size)
6523 unsigned int count = 0;
6524 struct nfs4_client *clp;
6525 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6527 LIST_HEAD(reaplist);
6529 if (!nfsd_netns_ready(nn))
6532 spin_lock(&nn->client_lock);
6533 clp = nfsd_find_client(addr, addr_size);
6535 count = nfsd_collect_client_locks(clp, &reaplist, 0);
6536 spin_unlock(&nn->client_lock);
6537 nfsd_reap_locks(&reaplist);
6542 nfsd_inject_forget_locks(u64 max)
6545 struct nfs4_client *clp;
6546 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6548 LIST_HEAD(reaplist);
6550 if (!nfsd_netns_ready(nn))
6553 spin_lock(&nn->client_lock);
6554 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6555 count += nfsd_collect_client_locks(clp, &reaplist, max - count);
6556 if (max != 0 && count >= max)
6559 spin_unlock(&nn->client_lock);
6560 nfsd_reap_locks(&reaplist);
6565 nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
6566 struct list_head *collect,
6567 void (*func)(struct nfs4_openowner *))
6569 struct nfs4_openowner *oop, *next;
6570 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6574 lockdep_assert_held(&nn->client_lock);
6576 spin_lock(&clp->cl_lock);
6577 list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) {
6581 atomic_inc(&clp->cl_refcount);
6582 list_add(&oop->oo_perclient, collect);
6587 * Despite the fact that these functions deal with
6588 * 64-bit integers for "count", we must ensure that
6589 * it doesn't blow up the clp->cl_refcount. Throw a
6590 * warning if we start to approach INT_MAX here.
6592 WARN_ON_ONCE(count == (INT_MAX / 2));
6596 spin_unlock(&clp->cl_lock);
6602 nfsd_print_client_openowners(struct nfs4_client *clp)
6604 u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL);
6606 nfsd_print_count(clp, count, "openowners");
6611 nfsd_collect_client_openowners(struct nfs4_client *clp,
6612 struct list_head *collect, u64 max)
6614 return nfsd_foreach_client_openowner(clp, max, collect,
6615 unhash_openowner_locked);
6619 nfsd_inject_print_openowners(void)
6621 struct nfs4_client *clp;
6623 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6626 if (!nfsd_netns_ready(nn))
6629 spin_lock(&nn->client_lock);
6630 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6631 count += nfsd_print_client_openowners(clp);
6632 spin_unlock(&nn->client_lock);
6638 nfsd_reap_openowners(struct list_head *reaplist)
6640 struct nfs4_client *clp;
6641 struct nfs4_openowner *oop, *next;
6643 list_for_each_entry_safe(oop, next, reaplist, oo_perclient) {
6644 list_del_init(&oop->oo_perclient);
6645 clp = oop->oo_owner.so_client;
6646 release_openowner(oop);
6652 nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr,
6655 unsigned int count = 0;
6656 struct nfs4_client *clp;
6657 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6659 LIST_HEAD(reaplist);
6661 if (!nfsd_netns_ready(nn))
6664 spin_lock(&nn->client_lock);
6665 clp = nfsd_find_client(addr, addr_size);
6667 count = nfsd_collect_client_openowners(clp, &reaplist, 0);
6668 spin_unlock(&nn->client_lock);
6669 nfsd_reap_openowners(&reaplist);
6674 nfsd_inject_forget_openowners(u64 max)
6677 struct nfs4_client *clp;
6678 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6680 LIST_HEAD(reaplist);
6682 if (!nfsd_netns_ready(nn))
6685 spin_lock(&nn->client_lock);
6686 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6687 count += nfsd_collect_client_openowners(clp, &reaplist,
6689 if (max != 0 && count >= max)
6692 spin_unlock(&nn->client_lock);
6693 nfsd_reap_openowners(&reaplist);
6697 static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
6698 struct list_head *victims)
6700 struct nfs4_delegation *dp, *next;
6701 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6705 lockdep_assert_held(&nn->client_lock);
6707 spin_lock(&state_lock);
6708 list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) {
6711 * It's not safe to mess with delegations that have a
6712 * non-zero dl_time. They might have already been broken
6713 * and could be processed by the laundromat outside of
6714 * the state_lock. Just leave them be.
6716 if (dp->dl_time != 0)
6719 atomic_inc(&clp->cl_refcount);
6720 WARN_ON(!unhash_delegation_locked(dp));
6721 list_add(&dp->dl_recall_lru, victims);
6725 * Despite the fact that these functions deal with
6726 * 64-bit integers for "count", we must ensure that
6727 * it doesn't blow up the clp->cl_refcount. Throw a
6728 * warning if we start to approach INT_MAX here.
6730 WARN_ON_ONCE(count == (INT_MAX / 2));
6734 spin_unlock(&state_lock);
6739 nfsd_print_client_delegations(struct nfs4_client *clp)
6741 u64 count = nfsd_find_all_delegations(clp, 0, NULL);
6743 nfsd_print_count(clp, count, "delegations");
6748 nfsd_inject_print_delegations(void)
6750 struct nfs4_client *clp;
6752 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6755 if (!nfsd_netns_ready(nn))
6758 spin_lock(&nn->client_lock);
6759 list_for_each_entry(clp, &nn->client_lru, cl_lru)
6760 count += nfsd_print_client_delegations(clp);
6761 spin_unlock(&nn->client_lock);
6767 nfsd_forget_delegations(struct list_head *reaplist)
6769 struct nfs4_client *clp;
6770 struct nfs4_delegation *dp, *next;
6772 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6773 list_del_init(&dp->dl_recall_lru);
6774 clp = dp->dl_stid.sc_client;
6775 revoke_delegation(dp);
6781 nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr,
6785 struct nfs4_client *clp;
6786 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6788 LIST_HEAD(reaplist);
6790 if (!nfsd_netns_ready(nn))
6793 spin_lock(&nn->client_lock);
6794 clp = nfsd_find_client(addr, addr_size);
6796 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6797 spin_unlock(&nn->client_lock);
6799 nfsd_forget_delegations(&reaplist);
6804 nfsd_inject_forget_delegations(u64 max)
6807 struct nfs4_client *clp;
6808 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6810 LIST_HEAD(reaplist);
6812 if (!nfsd_netns_ready(nn))
6815 spin_lock(&nn->client_lock);
6816 list_for_each_entry(clp, &nn->client_lru, cl_lru) {
6817 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6818 if (max != 0 && count >= max)
6821 spin_unlock(&nn->client_lock);
6822 nfsd_forget_delegations(&reaplist);
6827 nfsd_recall_delegations(struct list_head *reaplist)
6829 struct nfs4_client *clp;
6830 struct nfs4_delegation *dp, *next;
6832 list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) {
6833 list_del_init(&dp->dl_recall_lru);
6834 clp = dp->dl_stid.sc_client;
6836 * We skipped all entries that had a zero dl_time before,
6837 * so we can now reset the dl_time back to 0. If a delegation
6838 * break comes in now, then it won't make any difference since
6839 * we're recalling it either way.
6841 spin_lock(&state_lock);
6843 spin_unlock(&state_lock);
6844 nfsd_break_one_deleg(dp);
6850 nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr,
6854 struct nfs4_client *clp;
6855 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6857 LIST_HEAD(reaplist);
6859 if (!nfsd_netns_ready(nn))
6862 spin_lock(&nn->client_lock);
6863 clp = nfsd_find_client(addr, addr_size);
6865 count = nfsd_find_all_delegations(clp, 0, &reaplist);
6866 spin_unlock(&nn->client_lock);
6868 nfsd_recall_delegations(&reaplist);
6873 nfsd_inject_recall_delegations(u64 max)
6876 struct nfs4_client *clp, *next;
6877 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
6879 LIST_HEAD(reaplist);
6881 if (!nfsd_netns_ready(nn))
6884 spin_lock(&nn->client_lock);
6885 list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) {
6886 count += nfsd_find_all_delegations(clp, max - count, &reaplist);
6887 if (max != 0 && ++count >= max)
6890 spin_unlock(&nn->client_lock);
6891 nfsd_recall_delegations(&reaplist);
6894 #endif /* CONFIG_NFSD_FAULT_INJECTION */
6897 * Since the lifetime of a delegation isn't limited to that of an open, a
6898 * client may quite reasonably hang on to a delegation as long as it has
6899 * the inode cached. This becomes an obvious problem the first time a
6900 * client's inode cache approaches the size of the server's total memory.
6902 * For now we avoid this problem by imposing a hard limit on the number
6903 * of delegations, which varies according to the server's memory size.
6906 set_max_delegations(void)
6909 * Allow at most 4 delegations per megabyte of RAM. Quick
6910 * estimates suggest that in the worst case (where every delegation
6911 * is for a different inode), a delegation could take about 1.5K,
6912 * giving a worst case usage of about 6% of memory.
6914 max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
6917 static int nfs4_state_create_net(struct net *net)
6919 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6922 nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6923 CLIENT_HASH_SIZE, GFP_KERNEL);
6924 if (!nn->conf_id_hashtbl)
6926 nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) *
6927 CLIENT_HASH_SIZE, GFP_KERNEL);
6928 if (!nn->unconf_id_hashtbl)
6930 nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) *
6931 SESSION_HASH_SIZE, GFP_KERNEL);
6932 if (!nn->sessionid_hashtbl)
6935 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6936 INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]);
6937 INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]);
6939 for (i = 0; i < SESSION_HASH_SIZE; i++)
6940 INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]);
6941 nn->conf_name_tree = RB_ROOT;
6942 nn->unconf_name_tree = RB_ROOT;
6943 INIT_LIST_HEAD(&nn->client_lru);
6944 INIT_LIST_HEAD(&nn->close_lru);
6945 INIT_LIST_HEAD(&nn->del_recall_lru);
6946 INIT_LIST_HEAD(&nn->blocked_locks_lru);
6947 spin_lock_init(&nn->client_lock);
6949 INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
6955 kfree(nn->unconf_id_hashtbl);
6957 kfree(nn->conf_id_hashtbl);
6963 nfs4_state_destroy_net(struct net *net)
6966 struct nfs4_client *clp = NULL;
6967 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6969 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6970 while (!list_empty(&nn->conf_id_hashtbl[i])) {
6971 clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6972 destroy_client(clp);
6976 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
6977 while (!list_empty(&nn->unconf_id_hashtbl[i])) {
6978 clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
6979 destroy_client(clp);
6983 kfree(nn->sessionid_hashtbl);
6984 kfree(nn->unconf_id_hashtbl);
6985 kfree(nn->conf_id_hashtbl);
6990 nfs4_state_start_net(struct net *net)
6992 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6995 ret = nfs4_state_create_net(net);
6998 nn->boot_time = get_seconds();
6999 nn->grace_ended = false;
7000 nn->nfsd4_manager.block_opens = true;
7001 locks_start_grace(net, &nn->nfsd4_manager);
7002 nfsd4_client_tracking_init(net);
7003 printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
7004 nn->nfsd4_grace, net);
7005 queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
7009 /* initialization to perform when the nfsd service is started: */
7012 nfs4_state_start(void)
7016 ret = set_callback_cred();
7019 laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
7020 if (laundry_wq == NULL) {
7024 ret = nfsd4_create_callback_queue();
7026 goto out_free_laundry;
7028 set_max_delegations();
7033 destroy_workqueue(laundry_wq);
7039 nfs4_state_shutdown_net(struct net *net)
7041 struct nfs4_delegation *dp = NULL;
7042 struct list_head *pos, *next, reaplist;
7043 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
7044 struct nfsd4_blocked_lock *nbl;
7046 cancel_delayed_work_sync(&nn->laundromat_work);
7047 locks_end_grace(&nn->nfsd4_manager);
7049 INIT_LIST_HEAD(&reaplist);
7050 spin_lock(&state_lock);
7051 list_for_each_safe(pos, next, &nn->del_recall_lru) {
7052 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7053 WARN_ON(!unhash_delegation_locked(dp));
7054 list_add(&dp->dl_recall_lru, &reaplist);
7056 spin_unlock(&state_lock);
7057 list_for_each_safe(pos, next, &reaplist) {
7058 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
7059 list_del_init(&dp->dl_recall_lru);
7060 put_clnt_odstate(dp->dl_clnt_odstate);
7061 nfs4_put_deleg_lease(dp->dl_stid.sc_file);
7062 nfs4_put_stid(&dp->dl_stid);
7065 BUG_ON(!list_empty(&reaplist));
7066 spin_lock(&nn->client_lock);
7067 while (!list_empty(&nn->blocked_locks_lru)) {
7068 nbl = list_first_entry(&nn->blocked_locks_lru,
7069 struct nfsd4_blocked_lock, nbl_lru);
7070 list_move(&nbl->nbl_lru, &reaplist);
7071 list_del_init(&nbl->nbl_list);
7073 spin_unlock(&nn->client_lock);
7075 while (!list_empty(&reaplist)) {
7076 nbl = list_first_entry(&nn->blocked_locks_lru,
7077 struct nfsd4_blocked_lock, nbl_lru);
7078 list_del_init(&nbl->nbl_lru);
7079 posix_unblock_lock(&nbl->nbl_lock);
7080 free_blocked_lock(nbl);
7083 nfsd4_client_tracking_exit(net);
7084 nfs4_state_destroy_net(net);
7088 nfs4_state_shutdown(void)
7090 destroy_workqueue(laundry_wq);
7091 nfsd4_destroy_callback_queue();
7095 get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7097 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid))
7098 memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t));
7102 put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid)
7104 if (cstate->minorversion) {
7105 memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t));
7106 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7111 clear_current_stateid(struct nfsd4_compound_state *cstate)
7113 CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
7117 * functions to set current state id
7120 nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
7122 put_stateid(cstate, &odp->od_stateid);
7126 nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
7128 put_stateid(cstate, &open->op_stateid);
7132 nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
7134 put_stateid(cstate, &close->cl_stateid);
7138 nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock)
7140 put_stateid(cstate, &lock->lk_resp_stateid);
7144 * functions to consume current state id
7148 nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp)
7150 get_stateid(cstate, &odp->od_stateid);
7154 nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp)
7156 get_stateid(cstate, &drp->dr_stateid);
7160 nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp)
7162 get_stateid(cstate, &fsp->fr_stateid);
7166 nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr)
7168 get_stateid(cstate, &setattr->sa_stateid);
7172 nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close)
7174 get_stateid(cstate, &close->cl_stateid);
7178 nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku)
7180 get_stateid(cstate, &locku->lu_stateid);
7184 nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read)
7186 get_stateid(cstate, &read->rd_stateid);
7190 nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write)
7192 get_stateid(cstate, &write->wr_stateid);