2 * linux/fs/nfsd/nfs4state.c
4 * Copyright (c) 2001 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <kandros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/param.h>
38 #include <linux/major.h>
39 #include <linux/slab.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/cache.h>
44 #include <linux/mount.h>
45 #include <linux/workqueue.h>
46 #include <linux/smp_lock.h>
47 #include <linux/kthread.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfsd/state.h>
50 #include <linux/nfsd/xdr4.h>
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 static time_t lease_time = 90; /* default lease time */
56 static time_t old_lease_time = 90; /* past incarnation lease time */
57 static u32 nfs4_reclaim_init = 0;
59 static time_t grace_end = 0;
60 static u32 current_clientid = 1;
61 static u32 current_ownerid = 1;
62 static u32 current_fileid = 1;
63 static u32 current_delegid = 1;
65 stateid_t zerostateid; /* bits all 0 */
66 stateid_t onestateid; /* bits all 1 */
68 /* forward declarations */
69 struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
70 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
71 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
76 * protects clientid_hashtbl[], clientstr_hashtbl[],
77 * unconfstr_hashtbl[], uncofid_hashtbl[].
79 static DECLARE_MUTEX(client_sema);
81 kmem_cache_t *stateowner_slab = NULL;
82 kmem_cache_t *file_slab = NULL;
83 kmem_cache_t *stateid_slab = NULL;
84 kmem_cache_t *deleg_slab = NULL;
93 nfs4_unlock_state(void)
99 opaque_hashval(const void *ptr, int nbytes)
101 unsigned char *cptr = (unsigned char *) ptr;
111 /* forward declarations */
112 static void release_stateowner(struct nfs4_stateowner *sop);
113 static void release_stateid(struct nfs4_stateid *stp, int flags);
114 static void release_file(struct nfs4_file *fp);
120 /* recall_lock protects the del_recall_lru */
121 spinlock_t recall_lock;
122 static struct list_head del_recall_lru;
124 static struct nfs4_delegation *
125 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
127 struct nfs4_delegation *dp;
128 struct nfs4_file *fp = stp->st_file;
129 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
131 dprintk("NFSD alloc_init_deleg\n");
132 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
135 INIT_LIST_HEAD(&dp->dl_del_perfile);
136 INIT_LIST_HEAD(&dp->dl_del_perclnt);
137 INIT_LIST_HEAD(&dp->dl_recall_lru);
141 get_file(stp->st_vfs_file);
142 dp->dl_vfs_file = stp->st_vfs_file;
144 dp->dl_recall.cbr_dp = NULL;
145 dp->dl_recall.cbr_ident = cb->cb_ident;
146 dp->dl_recall.cbr_trunc = 0;
147 dp->dl_stateid.si_boot = boot_time;
148 dp->dl_stateid.si_stateownerid = current_delegid++;
149 dp->dl_stateid.si_fileid = 0;
150 dp->dl_stateid.si_generation = 0;
151 dp->dl_fhlen = current_fh->fh_handle.fh_size;
152 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
153 current_fh->fh_handle.fh_size);
155 atomic_set(&dp->dl_count, 1);
156 list_add(&dp->dl_del_perfile, &fp->fi_delegations);
157 list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
162 nfs4_put_delegation(struct nfs4_delegation *dp)
164 if (atomic_dec_and_test(&dp->dl_count)) {
165 dprintk("NFSD: freeing dp %p\n",dp);
166 kmem_cache_free(deleg_slab, dp);
170 /* Remove the associated file_lock first, then remove the delegation.
171 * lease_modify() is called to remove the FS_LEASE file_lock from
172 * the i_flock list, eventually calling nfsd's lock_manager
173 * fl_release_callback.
176 nfs4_close_delegation(struct nfs4_delegation *dp)
178 struct file *filp = dp->dl_vfs_file;
180 dprintk("NFSD: close_delegation dp %p\n",dp);
181 dp->dl_vfs_file = NULL;
182 /* The following nfsd_close may not actually close the file,
183 * but we want to remove the lease in any case. */
185 setlease(filp, F_UNLCK, &dp->dl_flock);
189 /* Called under the state lock. */
191 unhash_delegation(struct nfs4_delegation *dp)
193 list_del_init(&dp->dl_del_perfile);
194 list_del_init(&dp->dl_del_perclnt);
195 spin_lock(&recall_lock);
196 list_del_init(&dp->dl_recall_lru);
197 spin_unlock(&recall_lock);
198 nfs4_close_delegation(dp);
199 nfs4_put_delegation(dp);
206 /* Hash tables for nfs4_clientid state */
207 #define CLIENT_HASH_BITS 4
208 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
209 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
211 #define clientid_hashval(id) \
212 ((id) & CLIENT_HASH_MASK)
213 #define clientstr_hashval(name, namelen) \
214 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
216 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
217 * used in reboot/reset lease grace period processing
219 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
220 * setclientid_confirmed info.
222 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
225 * client_lru holds client queue ordered by nfs4_client.cl_time
228 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
229 * for last close replay.
231 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
232 static int reclaim_str_hashtbl_size = 0;
233 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
234 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
235 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
236 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
237 static struct list_head client_lru;
238 static struct list_head close_lru;
241 renew_client(struct nfs4_client *clp)
244 * Move client to the end to the LRU list.
246 dprintk("renewing client (clientid %08x/%08x)\n",
247 clp->cl_clientid.cl_boot,
248 clp->cl_clientid.cl_id);
249 list_move_tail(&clp->cl_lru, &client_lru);
250 clp->cl_time = get_seconds();
253 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
255 STALE_CLIENTID(clientid_t *clid)
257 if (clid->cl_boot == boot_time)
259 dprintk("NFSD stale clientid (%08x/%08x)\n",
260 clid->cl_boot, clid->cl_id);
265 * XXX Should we use a slab cache ?
266 * This type of memory management is somewhat inefficient, but we use it
267 * anyway since SETCLIENTID is not a common operation.
269 static inline struct nfs4_client *
270 alloc_client(struct xdr_netobj name)
272 struct nfs4_client *clp;
274 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
275 memset(clp, 0, sizeof(*clp));
276 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
277 memcpy(clp->cl_name.data, name.data, name.len);
278 clp->cl_name.len = name.len;
289 free_client(struct nfs4_client *clp)
291 if (clp->cl_cred.cr_group_info)
292 put_group_info(clp->cl_cred.cr_group_info);
293 kfree(clp->cl_name.data);
298 put_nfs4_client(struct nfs4_client *clp)
300 if (atomic_dec_and_test(&clp->cl_count))
305 expire_client(struct nfs4_client *clp)
307 struct nfs4_stateowner *sop;
308 struct nfs4_delegation *dp;
309 struct nfs4_callback *cb = &clp->cl_callback;
310 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
311 struct list_head reaplist;
313 dprintk("NFSD: expire_client cl_count %d\n",
314 atomic_read(&clp->cl_count));
316 /* shutdown rpc client, ending any outstanding recall rpcs */
317 if (atomic_read(&cb->cb_set) == 1 && clnt) {
318 rpc_shutdown_client(clnt);
319 clnt = clp->cl_callback.cb_client = NULL;
322 INIT_LIST_HEAD(&reaplist);
323 spin_lock(&recall_lock);
324 while (!list_empty(&clp->cl_del_perclnt)) {
325 dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt);
326 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
328 list_del_init(&dp->dl_del_perclnt);
329 list_move(&dp->dl_recall_lru, &reaplist);
331 spin_unlock(&recall_lock);
332 while (!list_empty(&reaplist)) {
333 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
334 list_del_init(&dp->dl_recall_lru);
335 unhash_delegation(dp);
337 list_del(&clp->cl_idhash);
338 list_del(&clp->cl_strhash);
339 list_del(&clp->cl_lru);
340 while (!list_empty(&clp->cl_perclient)) {
341 sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
342 release_stateowner(sop);
344 put_nfs4_client(clp);
347 static struct nfs4_client *
348 create_client(struct xdr_netobj name) {
349 struct nfs4_client *clp;
351 if (!(clp = alloc_client(name)))
353 atomic_set(&clp->cl_count, 1);
354 atomic_set(&clp->cl_callback.cb_set, 0);
355 clp->cl_callback.cb_parsed = 0;
356 INIT_LIST_HEAD(&clp->cl_idhash);
357 INIT_LIST_HEAD(&clp->cl_strhash);
358 INIT_LIST_HEAD(&clp->cl_perclient);
359 INIT_LIST_HEAD(&clp->cl_del_perclnt);
360 INIT_LIST_HEAD(&clp->cl_lru);
366 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
367 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
371 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
372 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
373 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
377 copy_cred(struct svc_cred *target, struct svc_cred *source) {
379 target->cr_uid = source->cr_uid;
380 target->cr_gid = source->cr_gid;
381 target->cr_group_info = source->cr_group_info;
382 get_group_info(target->cr_group_info);
386 cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) {
389 return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len));
393 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
394 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
398 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
399 return((cl1->cl_boot == cl2->cl_boot) &&
400 (cl1->cl_id == cl2->cl_id));
403 /* XXX what about NGROUP */
405 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
406 return(cr1->cr_uid == cr2->cr_uid);
411 gen_clid(struct nfs4_client *clp) {
412 clp->cl_clientid.cl_boot = boot_time;
413 clp->cl_clientid.cl_id = current_clientid++;
417 gen_confirm(struct nfs4_client *clp) {
422 p = (u32 *)clp->cl_confirm.data;
428 check_name(struct xdr_netobj name) {
432 if (name.len > NFS4_OPAQUE_LIMIT) {
433 printk("NFSD: check_name: name too long(%d)!\n", name.len);
440 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
442 unsigned int idhashval;
444 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
445 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
446 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
447 list_add_tail(&clp->cl_lru, &client_lru);
448 clp->cl_time = get_seconds();
452 move_to_confirmed(struct nfs4_client *clp)
454 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
455 unsigned int strhashval;
457 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
458 list_del_init(&clp->cl_strhash);
459 list_del_init(&clp->cl_idhash);
460 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
461 strhashval = clientstr_hashval(clp->cl_name.data,
463 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
467 static struct nfs4_client *
468 find_confirmed_client(clientid_t *clid)
470 struct nfs4_client *clp;
471 unsigned int idhashval = clientid_hashval(clid->cl_id);
473 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
474 if (cmp_clid(&clp->cl_clientid, clid))
480 static struct nfs4_client *
481 find_unconfirmed_client(clientid_t *clid)
483 struct nfs4_client *clp;
484 unsigned int idhashval = clientid_hashval(clid->cl_id);
486 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
487 if (cmp_clid(&clp->cl_clientid, clid))
493 /* a helper function for parse_callback */
495 parse_octet(unsigned int *lenp, char **addrp)
497 unsigned int len = *lenp;
509 if ((c < '0') || (c > '9')) {
515 n = (n * 10) + (c - '0');
526 /* parse and set the setclientid ipv4 callback address */
528 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
533 u32 addrlen = addr_len;
534 char *addr = addr_val;
539 for(i = 4; i > 0 ; i--) {
540 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
543 cbaddr |= (temp << shift);
551 for(i = 2; i > 0 ; i--) {
552 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
555 cbport |= (temp << shift);
564 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
566 struct nfs4_callback *cb = &clp->cl_callback;
568 /* Currently, we only support tcp for the callback channel */
569 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
572 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
573 &cb->cb_addr, &cb->cb_port)))
575 cb->cb_prog = se->se_callback_prog;
576 cb->cb_ident = se->se_callback_ident;
580 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
581 "will not receive delegations\n",
582 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
589 * RFC 3010 has a complex implmentation description of processing a
590 * SETCLIENTID request consisting of 5 bullets, labeled as
591 * CASE0 - CASE4 below.
594 * callback information will be processed in a future patch
596 * an unconfirmed record is added when:
597 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
598 * CASE 1: confirmed record found with matching name, principal,
599 * verifier, and clientid.
600 * CASE 2: confirmed record found with matching name, principal,
601 * and there is no unconfirmed record with matching
604 * an unconfirmed record is replaced when:
605 * CASE 3: confirmed record found with matching name, principal,
606 * and an unconfirmed record is found with matching
607 * name, principal, and with clientid and
608 * confirm that does not match the confirmed record.
609 * CASE 4: there is no confirmed record with matching name and
610 * principal. there is an unconfirmed record with
611 * matching name, principal.
613 * an unconfirmed record is deleted when:
614 * CASE 1: an unconfirmed record that matches input name, verifier,
615 * and confirmed clientid.
616 * CASE 4: any unconfirmed records with matching name and principal
617 * that exist after an unconfirmed record has been replaced
618 * as described above.
622 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
624 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
625 struct xdr_netobj clname = {
626 .len = setclid->se_namelen,
627 .data = setclid->se_name,
629 nfs4_verifier clverifier = setclid->se_verf;
630 unsigned int strhashval;
631 struct nfs4_client * conf, * unconf, * new, * clp;
634 status = nfserr_inval;
635 if (!check_name(clname))
639 * XXX The Duplicate Request Cache (DRC) has been checked (??)
640 * We get here on a DRC miss.
643 strhashval = clientstr_hashval(clname.data, clname.len);
647 list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) {
648 if (!cmp_name(&clp->cl_name, &clname))
652 * clname match, confirmed, different principal
653 * or different ip_address
655 status = nfserr_clid_inuse;
656 if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) {
657 printk("NFSD: setclientid: string in use by client"
658 "(clientid %08x/%08x)\n",
659 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
662 if (clp->cl_addr != ip_addr) {
663 printk("NFSD: setclientid: string in use by client"
664 "(clientid %08x/%08x)\n",
665 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
670 * cl_name match from a previous SETCLIENTID operation
671 * XXX check for additional matches?
677 list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) {
678 if (!cmp_name(&clp->cl_name, &clname))
680 /* cl_name match from a previous SETCLIENTID operation */
684 status = nfserr_resource;
688 * placed first, because it is the normal case.
691 expire_client(unconf);
692 if (!(new = create_client(clname)))
694 copy_verf(new, &clverifier);
695 new->cl_addr = ip_addr;
696 copy_cred(&new->cl_cred,&rqstp->rq_cred);
699 gen_callback(new, setclid);
700 add_to_unconfirmed(new, strhashval);
701 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
704 * cl_name match, confirmed, principal match
705 * verifier match: probable callback update
707 * remove any unconfirmed nfs4_client with
708 * matching cl_name, cl_verifier, and cl_clientid
710 * create and insert an unconfirmed nfs4_client with same
711 * cl_name, cl_verifier, and cl_clientid as existing
712 * nfs4_client, but with the new callback info and a
716 cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) &&
717 cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) {
718 expire_client(unconf);
720 if (!(new = create_client(clname)))
722 copy_verf(new,&conf->cl_verifier);
723 new->cl_addr = ip_addr;
724 copy_cred(&new->cl_cred,&rqstp->rq_cred);
725 copy_clid(new, conf);
727 gen_callback(new, setclid);
728 add_to_unconfirmed(new,strhashval);
729 } else if (!unconf) {
732 * clname match, confirmed, principal match
733 * verfier does not match
734 * no unconfirmed. create a new unconfirmed nfs4_client
735 * using input clverifier, clname, and callback info
736 * and generate a new cl_clientid and cl_confirm.
738 if (!(new = create_client(clname)))
740 copy_verf(new,&clverifier);
741 new->cl_addr = ip_addr;
742 copy_cred(&new->cl_cred,&rqstp->rq_cred);
745 gen_callback(new, setclid);
746 add_to_unconfirmed(new, strhashval);
747 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
750 * confirmed found (name, principal match)
751 * confirmed verifier does not match input clverifier
753 * unconfirmed found (name match)
754 * confirmed->cl_confirm != unconfirmed->cl_confirm
756 * remove unconfirmed.
758 * create an unconfirmed nfs4_client
759 * with same cl_name as existing confirmed nfs4_client,
760 * but with new callback info, new cl_clientid,
761 * new cl_verifier and a new cl_confirm
763 expire_client(unconf);
764 if (!(new = create_client(clname)))
766 copy_verf(new,&clverifier);
767 new->cl_addr = ip_addr;
768 copy_cred(&new->cl_cred,&rqstp->rq_cred);
771 gen_callback(new, setclid);
772 add_to_unconfirmed(new, strhashval);
774 /* No cases hit !!! */
775 status = nfserr_inval;
779 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
780 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
781 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
790 * RFC 3010 has a complex implmentation description of processing a
791 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
792 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
794 * NOTE: callback information will be processed here in a future patch
797 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
799 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
800 struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
801 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
802 clientid_t * clid = &setclientid_confirm->sc_clientid;
805 if (STALE_CLIENTID(clid))
806 return nfserr_stale_clientid;
808 * XXX The Duplicate Request Cache (DRC) has been checked (??)
809 * We get here on a DRC miss.
813 clp = find_confirmed_client(clid);
815 status = nfserr_inval;
817 * Found a record for this clientid. If the IP addresses
818 * don't match, return ERR_INVAL just as if the record had
821 if (clp->cl_addr != ip_addr) {
822 printk("NFSD: setclientid: string in use by client"
823 "(clientid %08x/%08x)\n",
824 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
829 clp = find_unconfirmed_client(clid);
831 status = nfserr_inval;
832 if (clp->cl_addr != ip_addr) {
833 printk("NFSD: setclientid: string in use by client"
834 "(clientid %08x/%08x)\n",
835 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
841 * unconf record that matches input clientid and input confirm.
842 * conf record that matches input clientid.
843 * conf and unconf records match names, verifiers
845 if ((conf && unconf) &&
846 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
847 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
848 (cmp_name(&conf->cl_name,&unconf->cl_name)) &&
849 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
850 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
851 status = nfserr_clid_inuse;
855 move_to_confirmed(unconf);
861 * conf record that matches input clientid.
862 * if unconf record that matches input clientid, then unconf->cl_name
863 * or unconf->cl_verifier don't match the conf record.
865 if ((conf && !unconf) ||
867 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
868 !cmp_name(&conf->cl_name, &unconf->cl_name)))) {
869 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
870 status = nfserr_clid_inuse;
878 * conf record not found.
879 * unconf record found.
880 * unconf->cl_confirm matches input confirm
882 if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) {
883 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
884 status = nfserr_clid_inuse;
888 move_to_confirmed(unconf);
893 * conf record not found, or if conf, then conf->cl_confirm does not
894 * match input confirm.
895 * unconf record not found, or if unconf, then unconf->cl_confirm
896 * does not match input confirm.
898 if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) &&
899 (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) {
900 status = nfserr_stale_clientid;
903 /* check that we have hit one of the cases...*/
904 status = nfserr_inval;
908 nfsd4_probe_callback(clp);
914 * Open owner state (share locks)
917 /* hash tables for nfs4_stateowner */
918 #define OWNER_HASH_BITS 8
919 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
920 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
922 #define ownerid_hashval(id) \
923 ((id) & OWNER_HASH_MASK)
924 #define ownerstr_hashval(clientid, ownername) \
925 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
927 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
928 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
930 /* hash table for nfs4_file */
931 #define FILE_HASH_BITS 8
932 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
933 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
934 /* hash table for (open)nfs4_stateid */
935 #define STATEID_HASH_BITS 10
936 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
937 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
939 #define file_hashval(x) \
940 hash_ptr(x, FILE_HASH_BITS)
941 #define stateid_hashval(owner_id, file_id) \
942 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
944 static struct list_head file_hashtbl[FILE_HASH_SIZE];
945 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
947 /* OPEN Share state helper functions */
948 static inline struct nfs4_file *
949 alloc_init_file(struct inode *ino)
951 struct nfs4_file *fp;
952 unsigned int hashval = file_hashval(ino);
954 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
956 INIT_LIST_HEAD(&fp->fi_hash);
957 INIT_LIST_HEAD(&fp->fi_stateids);
958 INIT_LIST_HEAD(&fp->fi_delegations);
959 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
960 fp->fi_inode = igrab(ino);
961 fp->fi_id = current_fileid++;
968 release_all_files(void)
971 struct nfs4_file *fp;
973 for (i=0;i<FILE_HASH_SIZE;i++) {
974 while (!list_empty(&file_hashtbl[i])) {
975 fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash);
976 /* this should never be more than once... */
977 if (!list_empty(&fp->fi_stateids) || !list_empty(&fp->fi_delegations)) {
978 printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp);
986 nfsd4_free_slab(kmem_cache_t **slab)
992 status = kmem_cache_destroy(*slab);
998 nfsd4_free_slabs(void)
1000 nfsd4_free_slab(&stateowner_slab);
1001 nfsd4_free_slab(&file_slab);
1002 nfsd4_free_slab(&stateid_slab);
1003 nfsd4_free_slab(&deleg_slab);
1007 nfsd4_init_slabs(void)
1009 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1010 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1011 if (stateowner_slab == NULL)
1013 file_slab = kmem_cache_create("nfsd4_files",
1014 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1015 if (file_slab == NULL)
1017 stateid_slab = kmem_cache_create("nfsd4_stateids",
1018 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1019 if (stateid_slab == NULL)
1021 deleg_slab = kmem_cache_create("nfsd4_delegations",
1022 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1023 if (deleg_slab == NULL)
1028 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1033 nfs4_free_stateowner(struct kref *kref)
1035 struct nfs4_stateowner *sop =
1036 container_of(kref, struct nfs4_stateowner, so_ref);
1037 kfree(sop->so_owner.data);
1038 kmem_cache_free(stateowner_slab, sop);
1041 static inline struct nfs4_stateowner *
1042 alloc_stateowner(struct xdr_netobj *owner)
1044 struct nfs4_stateowner *sop;
1046 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1047 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1048 memcpy(sop->so_owner.data, owner->data, owner->len);
1049 sop->so_owner.len = owner->len;
1050 kref_init(&sop->so_ref);
1053 kmem_cache_free(stateowner_slab, sop);
1058 static struct nfs4_stateowner *
1059 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1060 struct nfs4_stateowner *sop;
1061 struct nfs4_replay *rp;
1062 unsigned int idhashval;
1064 if (!(sop = alloc_stateowner(&open->op_owner)))
1066 idhashval = ownerid_hashval(current_ownerid);
1067 INIT_LIST_HEAD(&sop->so_idhash);
1068 INIT_LIST_HEAD(&sop->so_strhash);
1069 INIT_LIST_HEAD(&sop->so_perclient);
1070 INIT_LIST_HEAD(&sop->so_perfilestate);
1071 INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */
1072 INIT_LIST_HEAD(&sop->so_close_lru);
1074 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1075 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1076 list_add(&sop->so_perclient, &clp->cl_perclient);
1077 sop->so_is_open_owner = 1;
1078 sop->so_id = current_ownerid++;
1079 sop->so_client = clp;
1080 sop->so_seqid = open->op_seqid;
1081 sop->so_confirmed = 0;
1082 rp = &sop->so_replay;
1083 rp->rp_status = NFSERR_SERVERFAULT;
1085 rp->rp_buf = rp->rp_ibuf;
1090 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1092 struct nfs4_stateowner *lock_sop;
1094 while (!list_empty(&open_stp->st_perlockowner)) {
1095 lock_sop = list_entry(open_stp->st_perlockowner.next,
1096 struct nfs4_stateowner, so_perlockowner);
1097 /* list_del(&open_stp->st_perlockowner); */
1098 BUG_ON(lock_sop->so_is_open_owner);
1099 release_stateowner(lock_sop);
1104 unhash_stateowner(struct nfs4_stateowner *sop)
1106 struct nfs4_stateid *stp;
1108 list_del(&sop->so_idhash);
1109 list_del(&sop->so_strhash);
1110 if (sop->so_is_open_owner)
1111 list_del(&sop->so_perclient);
1112 list_del(&sop->so_perlockowner);
1113 while (!list_empty(&sop->so_perfilestate)) {
1114 stp = list_entry(sop->so_perfilestate.next,
1115 struct nfs4_stateid, st_perfilestate);
1116 if (sop->so_is_open_owner)
1117 release_stateid(stp, OPEN_STATE);
1119 release_stateid(stp, LOCK_STATE);
1124 release_stateowner(struct nfs4_stateowner *sop)
1126 unhash_stateowner(sop);
1127 list_del(&sop->so_close_lru);
1128 nfs4_put_stateowner(sop);
1132 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1133 struct nfs4_stateowner *sop = open->op_stateowner;
1134 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1136 INIT_LIST_HEAD(&stp->st_hash);
1137 INIT_LIST_HEAD(&stp->st_perfilestate);
1138 INIT_LIST_HEAD(&stp->st_perlockowner);
1139 INIT_LIST_HEAD(&stp->st_perfile);
1140 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1141 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
1142 list_add(&stp->st_perfile, &fp->fi_stateids);
1143 stp->st_stateowner = sop;
1145 stp->st_stateid.si_boot = boot_time;
1146 stp->st_stateid.si_stateownerid = sop->so_id;
1147 stp->st_stateid.si_fileid = fp->fi_id;
1148 stp->st_stateid.si_generation = 0;
1149 stp->st_access_bmap = 0;
1150 stp->st_deny_bmap = 0;
1151 __set_bit(open->op_share_access, &stp->st_access_bmap);
1152 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1156 release_stateid(struct nfs4_stateid *stp, int flags)
1158 struct file *filp = stp->st_vfs_file;
1160 list_del(&stp->st_hash);
1161 list_del(&stp->st_perfile);
1162 list_del(&stp->st_perfilestate);
1163 if (flags & OPEN_STATE) {
1164 release_stateid_lockowners(stp);
1165 stp->st_vfs_file = NULL;
1167 } else if (flags & LOCK_STATE)
1168 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1169 kmem_cache_free(stateid_slab, stp);
1174 release_file(struct nfs4_file *fp)
1176 list_del(&fp->fi_hash);
1178 kmem_cache_free(file_slab, fp);
1182 move_to_close_lru(struct nfs4_stateowner *sop)
1184 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1186 unhash_stateowner(sop);
1187 list_add_tail(&sop->so_close_lru, &close_lru);
1188 sop->so_time = get_seconds();
1192 release_state_owner(struct nfs4_stateid *stp, int flag)
1194 struct nfs4_stateowner *sop = stp->st_stateowner;
1195 struct nfs4_file *fp = stp->st_file;
1197 dprintk("NFSD: release_state_owner\n");
1198 release_stateid(stp, flag);
1200 /* place unused nfs4_stateowners on so_close_lru list to be
1201 * released by the laundromat service after the lease period
1202 * to enable us to handle CLOSE replay
1204 if (sop->so_confirmed && list_empty(&sop->so_perfilestate))
1205 move_to_close_lru(sop);
1206 /* unused nfs4_file's are releseed. XXX slab cache? */
1207 if (list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations)) {
1213 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1214 return ((sop->so_owner.len == owner->len) &&
1215 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1216 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1219 static struct nfs4_stateowner *
1220 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1222 struct nfs4_stateowner *so = NULL;
1224 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1225 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1231 /* search file_hashtbl[] for file */
1232 static struct nfs4_file *
1233 find_file(struct inode *ino)
1235 unsigned int hashval = file_hashval(ino);
1236 struct nfs4_file *fp;
1238 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1239 if (fp->fi_inode == ino)
1245 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1246 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1249 set_access(unsigned int *access, unsigned long bmap) {
1253 for (i = 1; i < 4; i++) {
1254 if (test_bit(i, &bmap))
1260 set_deny(unsigned int *deny, unsigned long bmap) {
1264 for (i = 0; i < 4; i++) {
1265 if (test_bit(i, &bmap))
1271 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1272 unsigned int access, deny;
1274 set_access(&access, stp->st_access_bmap);
1275 set_deny(&deny, stp->st_deny_bmap);
1276 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1282 * Called to check deny when READ with all zero stateid or
1283 * WRITE with all zero or all one stateid
1286 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1288 struct inode *ino = current_fh->fh_dentry->d_inode;
1289 struct nfs4_file *fp;
1290 struct nfs4_stateid *stp;
1292 dprintk("NFSD: nfs4_share_conflict\n");
1294 fp = find_file(ino);
1296 /* Search for conflicting share reservations */
1297 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1298 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1299 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1300 return nfserr_share_denied;
1307 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1309 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1310 put_write_access(filp->f_dentry->d_inode);
1311 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1316 * Recall a delegation
1319 do_recall(void *__dp)
1321 struct nfs4_delegation *dp = __dp;
1323 daemonize("nfsv4-recall");
1325 nfsd4_cb_recall(dp);
1330 * Spawn a thread to perform a recall on the delegation represented
1331 * by the lease (file_lock)
1333 * Called from break_lease() with lock_kernel() held.
1334 * Note: we assume break_lease will only call this *once* for any given
1338 void nfsd_break_deleg_cb(struct file_lock *fl)
1340 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1341 struct task_struct *t;
1343 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1347 /* We're assuming the state code never drops its reference
1348 * without first removing the lease. Since we're in this lease
1349 * callback (and since the lease code is serialized by the kernel
1350 * lock) we know the server hasn't removed the lease yet, we know
1351 * it's safe to take a reference: */
1352 atomic_inc(&dp->dl_count);
1354 spin_lock(&recall_lock);
1355 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1356 spin_unlock(&recall_lock);
1358 /* only place dl_time is set. protected by lock_kernel*/
1359 dp->dl_time = get_seconds();
1361 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1362 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1364 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1366 struct nfs4_client *clp = dp->dl_client;
1368 printk(KERN_INFO "NFSD: Callback thread failed for "
1369 "for client (clientid %08x/%08x)\n",
1370 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1371 nfs4_put_delegation(dp);
1376 * The file_lock is being reapd.
1378 * Called by locks_free_lock() with lock_kernel() held.
1381 void nfsd_release_deleg_cb(struct file_lock *fl)
1383 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1385 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1387 if (!(fl->fl_flags & FL_LEASE) || !dp)
1389 dp->dl_flock = NULL;
1393 * Set the delegation file_lock back pointer.
1395 * Called from __setlease() with lock_kernel() held.
1398 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1400 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1402 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1409 * Called from __setlease() with lock_kernel() held
1412 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1414 struct nfs4_delegation *onlistd =
1415 (struct nfs4_delegation *)onlist->fl_owner;
1416 struct nfs4_delegation *tryd =
1417 (struct nfs4_delegation *)try->fl_owner;
1419 if (onlist->fl_lmops != try->fl_lmops)
1422 return onlistd->dl_client == tryd->dl_client;
1427 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1430 return lease_modify(onlist, arg);
1435 struct lock_manager_operations nfsd_lease_mng_ops = {
1436 .fl_break = nfsd_break_deleg_cb,
1437 .fl_release_private = nfsd_release_deleg_cb,
1438 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1439 .fl_mylease = nfsd_same_client_deleg_cb,
1440 .fl_change = nfsd_change_deleg_cb,
1445 * nfsd4_process_open1()
1446 * lookup stateowner.
1458 * called with nfs4_lock_state() held.
1461 nfsd4_process_open1(struct nfsd4_open *open)
1464 clientid_t *clientid = &open->op_clientid;
1465 struct nfs4_client *clp = NULL;
1466 unsigned int strhashval;
1467 struct nfs4_stateowner *sop = NULL;
1469 status = nfserr_inval;
1470 if (!check_name(open->op_owner))
1473 if (STALE_CLIENTID(&open->op_clientid))
1474 return nfserr_stale_clientid;
1476 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1477 sop = find_openstateowner_str(strhashval, open);
1479 open->op_stateowner = sop;
1480 /* check for replay */
1481 if (open->op_seqid == sop->so_seqid){
1482 if (sop->so_replay.rp_buflen)
1483 return NFSERR_REPLAY_ME;
1485 /* The original OPEN failed so spectacularly
1486 * that we don't even have replay data saved!
1487 * Therefore, we have no choice but to continue
1488 * processing this OPEN; presumably, we'll
1489 * fail again for the same reason.
1491 dprintk("nfsd4_process_open1:"
1492 " replay with no replay cache\n");
1495 } else if (sop->so_confirmed) {
1496 if (open->op_seqid == sop->so_seqid + 1)
1498 status = nfserr_bad_seqid;
1501 /* If we get here, we received an OPEN for an
1502 * unconfirmed nfs4_stateowner. Since the seqid's are
1503 * different, purge the existing nfs4_stateowner, and
1504 * instantiate a new one.
1506 clp = sop->so_client;
1507 release_stateowner(sop);
1510 /* nfs4_stateowner not found.
1511 * Verify clientid and instantiate new nfs4_stateowner.
1512 * If verify fails this is presumably the result of the
1513 * client's lease expiring.
1515 status = nfserr_expired;
1516 clp = find_confirmed_client(clientid);
1520 status = nfserr_resource;
1521 sop = alloc_init_open_stateowner(strhashval, clp, open);
1524 open->op_stateowner = sop;
1527 renew_client(sop->so_client);
1529 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1530 status = nfserr_reclaim_bad;
1535 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1537 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1538 return nfserr_openmode;
1543 static struct nfs4_delegation *
1544 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1546 struct nfs4_delegation *dp;
1548 list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) {
1549 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1556 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1557 struct nfs4_delegation **dp)
1560 int status = nfserr_bad_stateid;
1562 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1565 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1566 RD_STATE : WR_STATE;
1567 status = nfs4_check_delegmode(*dp, flags);
1571 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1575 open->op_stateowner->so_confirmed = 1;
1580 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1582 struct nfs4_stateid *local;
1583 int status = nfserr_share_denied;
1584 struct nfs4_stateowner *sop = open->op_stateowner;
1586 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1587 /* ignore lock owners */
1588 if (local->st_stateowner->so_is_open_owner == 0)
1590 /* remember if we have seen this open owner */
1591 if (local->st_stateowner == sop)
1593 /* check for conflicting share reservations */
1594 if (!test_share(local, open))
1602 static inline struct nfs4_stateid *
1603 nfs4_alloc_stateid(void)
1605 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1609 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1610 struct nfs4_delegation *dp,
1611 struct svc_fh *cur_fh, int flags)
1613 struct nfs4_stateid *stp;
1615 stp = nfs4_alloc_stateid();
1617 return nfserr_resource;
1620 get_file(dp->dl_vfs_file);
1621 stp->st_vfs_file = dp->dl_vfs_file;
1624 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1627 if (status == nfserr_dropit)
1628 status = nfserr_jukebox;
1629 kmem_cache_free(stateid_slab, stp);
1638 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1639 struct nfsd4_open *open)
1641 struct iattr iattr = {
1642 .ia_valid = ATTR_SIZE,
1645 if (!open->op_truncate)
1647 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1649 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1653 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1655 struct file *filp = stp->st_vfs_file;
1656 struct inode *inode = filp->f_dentry->d_inode;
1657 unsigned int share_access;
1660 set_access(&share_access, stp->st_access_bmap);
1661 share_access = ~share_access;
1662 share_access &= open->op_share_access;
1664 if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
1665 return nfsd4_truncate(rqstp, cur_fh, open);
1667 status = get_write_access(inode);
1669 return nfserrno(status);
1670 status = nfsd4_truncate(rqstp, cur_fh, open);
1672 put_write_access(inode);
1675 /* remember the open */
1676 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
1677 set_bit(open->op_share_access, &stp->st_access_bmap);
1678 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1684 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1686 nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
1688 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
1690 *status = nfserr_reclaim_bad;
1692 open->op_stateowner->so_confirmed = 1;
1693 open->op_stateowner->so_seqid--;
1699 * Attempt to hand out a delegation.
1702 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1704 struct nfs4_delegation *dp;
1705 struct nfs4_stateowner *sop = stp->st_stateowner;
1706 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1707 struct file_lock fl, *flp = &fl;
1708 int status, flag = 0;
1710 flag = NFS4_OPEN_DELEGATE_NONE;
1711 if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL
1712 || !atomic_read(&cb->cb_set) || !sop->so_confirmed)
1715 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1716 flag = NFS4_OPEN_DELEGATE_WRITE;
1718 flag = NFS4_OPEN_DELEGATE_READ;
1720 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1722 flag = NFS4_OPEN_DELEGATE_NONE;
1725 locks_init_lock(&fl);
1726 fl.fl_lmops = &nfsd_lease_mng_ops;
1727 fl.fl_flags = FL_LEASE;
1728 fl.fl_end = OFFSET_MAX;
1729 fl.fl_owner = (fl_owner_t)dp;
1730 fl.fl_file = stp->st_vfs_file;
1731 fl.fl_pid = current->tgid;
1733 /* setlease checks to see if delegation should be handed out.
1734 * the lock_manager callbacks fl_mylease and fl_change are used
1736 if ((status = setlease(stp->st_vfs_file,
1737 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1738 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1739 unhash_delegation(dp);
1740 flag = NFS4_OPEN_DELEGATE_NONE;
1744 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1746 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1747 dp->dl_stateid.si_boot,
1748 dp->dl_stateid.si_stateownerid,
1749 dp->dl_stateid.si_fileid,
1750 dp->dl_stateid.si_generation);
1752 open->op_delegate_type = flag;
1756 * called with nfs4_lock_state() held.
1759 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1761 struct nfs4_file *fp = NULL;
1762 struct inode *ino = current_fh->fh_dentry->d_inode;
1763 struct nfs4_stateid *stp = NULL;
1764 struct nfs4_delegation *dp = NULL;
1767 status = nfserr_inval;
1768 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
1771 * Lookup file; if found, lookup stateid and check open request,
1772 * and check for delegations in the process of being recalled.
1773 * If not found, create the nfs4_file struct
1775 fp = find_file(ino);
1777 if ((status = nfs4_check_open(fp, open, &stp)))
1779 status = nfs4_check_deleg(fp, open, &dp);
1783 status = nfserr_bad_stateid;
1784 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1786 status = nfserr_resource;
1787 fp = alloc_init_file(ino);
1793 * OPEN the file, or upgrade an existing OPEN.
1794 * If truncate fails, the OPEN fails.
1797 /* Stateid was found, this is an OPEN upgrade */
1798 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1802 /* Stateid was not found, this is a new OPEN */
1804 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1808 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1811 init_stateid(stp, fp, open);
1812 status = nfsd4_truncate(rqstp, current_fh, open);
1814 release_stateid(stp, OPEN_STATE);
1818 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1821 * Attempt to hand out a delegation. No error return, because the
1822 * OPEN succeeds even if we fail.
1824 nfs4_open_delegation(current_fh, open, stp);
1828 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1829 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1830 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1832 /* take the opportunity to clean up unused state */
1833 if (fp && list_empty(&fp->fi_stateids) && list_empty(&fp->fi_delegations))
1836 /* CLAIM_PREVIOUS has different error returns */
1837 nfs4_set_claim_prev(open, &status);
1839 * To finish the open response, we just need to set the rflags.
1841 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1842 if (!open->op_stateowner->so_confirmed)
1843 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1848 static struct work_struct laundromat_work;
1849 static void laundromat_main(void *);
1850 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1853 nfsd4_renew(clientid_t *clid)
1855 struct nfs4_client *clp;
1859 dprintk("process_renew(%08x/%08x): starting\n",
1860 clid->cl_boot, clid->cl_id);
1861 status = nfserr_stale_clientid;
1862 if (STALE_CLIENTID(clid))
1864 clp = find_confirmed_client(clid);
1865 status = nfserr_expired;
1867 /* We assume the client took too long to RENEW. */
1868 dprintk("nfsd4_renew: clientid not found!\n");
1872 status = nfserr_cb_path_down;
1873 if (!list_empty(&clp->cl_del_perclnt)
1874 && !atomic_read(&clp->cl_callback.cb_set))
1878 nfs4_unlock_state();
1883 nfs4_laundromat(void)
1885 struct nfs4_client *clp;
1886 struct nfs4_stateowner *sop;
1887 struct nfs4_delegation *dp;
1888 struct list_head *pos, *next, reaplist;
1889 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1890 time_t t, clientid_val = NFSD_LEASE_TIME;
1891 time_t u, test_val = NFSD_LEASE_TIME;
1895 dprintk("NFSD: laundromat service - starting\n");
1896 list_for_each_safe(pos, next, &client_lru) {
1897 clp = list_entry(pos, struct nfs4_client, cl_lru);
1898 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1899 t = clp->cl_time - cutoff;
1900 if (clientid_val > t)
1904 dprintk("NFSD: purging unused client (clientid %08x)\n",
1905 clp->cl_clientid.cl_id);
1908 INIT_LIST_HEAD(&reaplist);
1909 spin_lock(&recall_lock);
1910 list_for_each_safe(pos, next, &del_recall_lru) {
1911 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1912 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1913 u = dp->dl_time - cutoff;
1918 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1920 list_move(&dp->dl_recall_lru, &reaplist);
1922 spin_unlock(&recall_lock);
1923 list_for_each_safe(pos, next, &reaplist) {
1924 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1925 list_del_init(&dp->dl_recall_lru);
1926 unhash_delegation(dp);
1928 test_val = NFSD_LEASE_TIME;
1929 list_for_each_safe(pos, next, &close_lru) {
1930 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1931 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1932 u = sop->so_time - cutoff;
1937 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1939 list_del(&sop->so_close_lru);
1940 nfs4_put_stateowner(sop);
1942 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1943 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1944 nfs4_unlock_state();
1945 return clientid_val;
1949 laundromat_main(void *not_used)
1953 t = nfs4_laundromat();
1954 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1955 schedule_delayed_work(&laundromat_work, t*HZ);
1958 /* search ownerid_hashtbl[] and close_lru for stateid owner
1959 * (stateid->si_stateownerid)
1961 struct nfs4_stateowner *
1962 find_openstateowner_id(u32 st_id, int flags) {
1963 struct nfs4_stateowner *local = NULL;
1965 dprintk("NFSD: find_openstateowner_id %d\n", st_id);
1966 if (flags & CLOSE_STATE) {
1967 list_for_each_entry(local, &close_lru, so_close_lru) {
1968 if (local->so_id == st_id)
1976 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1978 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
1982 STALE_STATEID(stateid_t *stateid)
1984 if (stateid->si_boot == boot_time)
1986 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1987 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1988 stateid->si_generation);
1993 access_permit_read(unsigned long access_bmap)
1995 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1996 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1997 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
2001 access_permit_write(unsigned long access_bmap)
2003 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
2004 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2008 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2010 int status = nfserr_openmode;
2012 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2014 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2022 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2024 /* Trying to call delegreturn with a special stateid? Yuch: */
2025 if (!(flags & (RD_STATE | WR_STATE)))
2026 return nfserr_bad_stateid;
2027 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2029 else if (nfs4_in_grace()) {
2030 /* Answer in remaining cases depends on existance of
2031 * conflicting state; so we must wait out the grace period. */
2032 return nfserr_grace;
2033 } else if (flags & WR_STATE)
2034 return nfs4_share_conflict(current_fh,
2035 NFS4_SHARE_DENY_WRITE);
2036 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2037 return nfs4_share_conflict(current_fh,
2038 NFS4_SHARE_DENY_READ);
2042 * Allow READ/WRITE during grace period on recovered state only for files
2043 * that are not able to provide mandatory locking.
2046 io_during_grace_disallowed(struct inode *inode, int flags)
2048 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2049 && MANDATORY_LOCK(inode);
2053 * Checks for stateid operations
2056 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2058 struct nfs4_stateid *stp = NULL;
2059 struct nfs4_delegation *dp = NULL;
2061 struct inode *ino = current_fh->fh_dentry->d_inode;
2064 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2065 stateid->si_boot, stateid->si_stateownerid,
2066 stateid->si_fileid, stateid->si_generation);
2070 if (io_during_grace_disallowed(ino, flags))
2071 return nfserr_grace;
2073 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2074 return check_special_stateids(current_fh, stateid, flags);
2077 status = nfserr_stale_stateid;
2078 if (STALE_STATEID(stateid))
2082 status = nfserr_bad_stateid;
2083 if (!stateid->si_fileid) { /* delegation stateid */
2084 if(!(dp = find_delegation_stateid(ino, stateid))) {
2085 dprintk("NFSD: delegation stateid not found\n");
2086 if (nfs4_in_grace())
2087 status = nfserr_grace;
2090 stidp = &dp->dl_stateid;
2091 } else { /* open or lock stateid */
2092 if (!(stp = find_stateid(stateid, flags))) {
2093 dprintk("NFSD: open or lock stateid not found\n");
2094 if (nfs4_in_grace())
2095 status = nfserr_grace;
2098 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2100 if (!stp->st_stateowner->so_confirmed)
2102 stidp = &stp->st_stateid;
2104 if (stateid->si_generation > stidp->si_generation)
2108 status = nfserr_old_stateid;
2109 if (stateid->si_generation < stidp->si_generation)
2112 if ((status = nfs4_check_openmode(stp,flags)))
2114 renew_client(stp->st_stateowner->so_client);
2116 *filpp = stp->st_vfs_file;
2118 if ((status = nfs4_check_delegmode(dp, flags)))
2120 renew_client(dp->dl_client);
2121 if (flags & DELEG_RET)
2122 unhash_delegation(dp);
2124 *filpp = dp->dl_vfs_file;
2133 * Checks for sequence id mutating operations.
2136 nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid)
2139 struct nfs4_stateid *stp;
2140 struct nfs4_stateowner *sop;
2142 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2143 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2144 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2145 stateid->si_generation);
2150 status = nfserr_bad_stateid;
2151 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2152 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2156 status = nfserr_stale_stateid;
2157 if (STALE_STATEID(stateid))
2160 * We return BAD_STATEID if filehandle doesn't match stateid,
2161 * the confirmed flag is incorrecly set, or the generation
2162 * number is incorrect.
2163 * If there is no entry in the openfile table for this id,
2164 * we can't always return BAD_STATEID;
2165 * this might be a retransmitted CLOSE which has arrived after
2166 * the openfile has been released.
2168 if (!(stp = find_stateid(stateid, flags)))
2169 goto no_nfs4_stateid;
2171 status = nfserr_bad_stateid;
2173 /* for new lock stateowners:
2174 * check that the lock->v.new.open_stateid
2175 * refers to an open stateowner
2177 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2178 * as the open_stateid->st_stateowner->so_client->clientid
2181 struct nfs4_stateowner *sop = stp->st_stateowner;
2182 struct nfs4_client *clp = sop->so_client;
2184 if (!sop->so_is_open_owner)
2186 if (!cmp_clid(&clp->cl_clientid, lockclid))
2190 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2191 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2196 *sopp = sop = stp->st_stateowner;
2199 * We now validate the seqid and stateid generation numbers.
2200 * For the moment, we ignore the possibility of
2201 * generation number wraparound.
2203 if (seqid != sop->so_seqid + 1)
2206 if (sop->so_confirmed) {
2207 if (flags & CONFIRM) {
2208 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2213 if (!(flags & CONFIRM)) {
2214 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2218 if (stateid->si_generation > stp->st_stateid.si_generation) {
2219 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2223 status = nfserr_old_stateid;
2224 if (stateid->si_generation < stp->st_stateid.si_generation) {
2225 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2228 /* XXX renew the client lease here */
2237 * We determine whether this is a bad stateid or a replay,
2238 * starting by trying to look up the stateowner.
2239 * If stateowner is not found - stateid is bad.
2241 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) {
2242 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2243 status = nfserr_bad_stateid;
2249 if (seqid == sop->so_seqid) {
2250 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2251 /* indicate replay to calling function */
2252 status = NFSERR_REPLAY_ME;
2254 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
2257 status = nfserr_bad_seqid;
2263 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
2266 struct nfs4_stateowner *sop;
2267 struct nfs4_stateid *stp;
2269 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2270 (int)current_fh->fh_dentry->d_name.len,
2271 current_fh->fh_dentry->d_name.name);
2273 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2278 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2279 &oc->oc_req_stateid,
2280 CHECK_FH | CONFIRM | OPEN_STATE,
2281 &oc->oc_stateowner, &stp, NULL)))
2284 sop = oc->oc_stateowner;
2285 sop->so_confirmed = 1;
2286 update_stateid(&stp->st_stateid);
2287 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2288 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2289 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2290 stp->st_stateid.si_boot,
2291 stp->st_stateid.si_stateownerid,
2292 stp->st_stateid.si_fileid,
2293 stp->st_stateid.si_generation);
2295 if (oc->oc_stateowner)
2296 nfs4_get_stateowner(oc->oc_stateowner);
2297 nfs4_unlock_state();
2303 * unset all bits in union bitmap (bmap) that
2304 * do not exist in share (from successful OPEN_DOWNGRADE)
2307 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2310 for (i = 1; i < 4; i++) {
2311 if ((i & access) != i)
2312 __clear_bit(i, bmap);
2317 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2320 for (i = 0; i < 4; i++) {
2321 if ((i & deny) != i)
2322 __clear_bit(i, bmap);
2327 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
2330 struct nfs4_stateid *stp;
2331 unsigned int share_access;
2333 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2334 (int)current_fh->fh_dentry->d_name.len,
2335 current_fh->fh_dentry->d_name.name);
2337 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
2338 return nfserr_inval;
2341 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
2343 CHECK_FH | OPEN_STATE,
2344 &od->od_stateowner, &stp, NULL)))
2347 status = nfserr_inval;
2348 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2349 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2350 stp->st_access_bmap, od->od_share_access);
2353 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2354 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2355 stp->st_deny_bmap, od->od_share_deny);
2358 set_access(&share_access, stp->st_access_bmap);
2359 nfs4_file_downgrade(stp->st_vfs_file,
2360 share_access & ~od->od_share_access);
2362 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2363 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2365 update_stateid(&stp->st_stateid);
2366 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2369 if (od->od_stateowner)
2370 nfs4_get_stateowner(od->od_stateowner);
2371 nfs4_unlock_state();
2376 * nfs4_unlock_state() called after encode
2379 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
2382 struct nfs4_stateid *stp;
2384 dprintk("NFSD: nfsd4_close on file %.*s\n",
2385 (int)current_fh->fh_dentry->d_name.len,
2386 current_fh->fh_dentry->d_name.name);
2389 /* check close_lru for replay */
2390 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2392 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2393 &close->cl_stateowner, &stp, NULL)))
2396 * Return success, but first update the stateid.
2399 update_stateid(&stp->st_stateid);
2400 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2402 /* release_state_owner() calls nfsd_close() if needed */
2403 release_state_owner(stp, OPEN_STATE);
2405 if (close->cl_stateowner)
2406 nfs4_get_stateowner(close->cl_stateowner);
2407 nfs4_unlock_state();
2412 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2416 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2420 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2421 nfs4_unlock_state();
2428 * Lock owner state (byte-range locks)
2430 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2431 #define LOCK_HASH_BITS 8
2432 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2433 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2435 #define lockownerid_hashval(id) \
2436 ((id) & LOCK_HASH_MASK)
2438 static inline unsigned int
2439 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2440 struct xdr_netobj *ownername)
2442 return (file_hashval(inode) + cl_id
2443 + opaque_hashval(ownername->data, ownername->len))
2447 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2448 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2449 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2451 struct nfs4_stateid *
2452 find_stateid(stateid_t *stid, int flags)
2454 struct nfs4_stateid *local = NULL;
2455 u32 st_id = stid->si_stateownerid;
2456 u32 f_id = stid->si_fileid;
2457 unsigned int hashval;
2459 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2460 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2461 hashval = stateid_hashval(st_id, f_id);
2462 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2463 if ((local->st_stateid.si_stateownerid == st_id) &&
2464 (local->st_stateid.si_fileid == f_id))
2468 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2469 hashval = stateid_hashval(st_id, f_id);
2470 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2471 if ((local->st_stateid.si_stateownerid == st_id) &&
2472 (local->st_stateid.si_fileid == f_id))
2476 printk("NFSD: find_stateid: ERROR: no state flag\n");
2480 static struct nfs4_delegation *
2481 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2483 struct nfs4_file *fp = NULL;
2485 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2486 stid->si_boot, stid->si_stateownerid,
2487 stid->si_fileid, stid->si_generation);
2489 fp = find_file(ino);
2491 return find_delegation_file(fp, stid);
2496 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2497 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2498 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2499 * locking, this prevents us from being completely protocol-compliant. The
2500 * real solution to this problem is to start using unsigned file offsets in
2501 * the VFS, but this is a very deep change!
2504 nfs4_transform_lock_offset(struct file_lock *lock)
2506 if (lock->fl_start < 0)
2507 lock->fl_start = OFFSET_MAX;
2508 if (lock->fl_end < 0)
2509 lock->fl_end = OFFSET_MAX;
2513 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
2515 struct nfs4_stateowner *local = NULL;
2518 if (hashval >= LOCK_HASH_SIZE)
2520 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) {
2532 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2534 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
2535 unsigned int hval = lockownerid_hashval(sop->so_id);
2537 deny->ld_sop = NULL;
2538 if (nfs4_verify_lock_stateowner(sop, hval)) {
2539 kref_get(&sop->so_ref);
2541 deny->ld_clientid = sop->so_client->cl_clientid;
2543 deny->ld_start = fl->fl_start;
2544 deny->ld_length = ~(u64)0;
2545 if (fl->fl_end != ~(u64)0)
2546 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2547 deny->ld_type = NFS4_READ_LT;
2548 if (fl->fl_type != F_RDLCK)
2549 deny->ld_type = NFS4_WRITE_LT;
2552 static struct nfs4_stateowner *
2553 find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid)
2555 struct nfs4_stateowner *local = NULL;
2558 for (i = 0; i < LOCK_HASH_SIZE; i++) {
2559 list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) {
2560 if (!cmp_owner_str(local, owner, clid))
2568 static struct nfs4_stateowner *
2569 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2570 struct xdr_netobj *owner)
2572 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2573 struct nfs4_stateowner *op;
2575 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2576 if (cmp_owner_str(op, owner, clid))
2583 * Alloc a lock owner structure.
2584 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2587 * strhashval = lock_ownerstr_hashval
2588 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2591 static struct nfs4_stateowner *
2592 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2593 struct nfs4_stateowner *sop;
2594 struct nfs4_replay *rp;
2595 unsigned int idhashval;
2597 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2599 idhashval = lockownerid_hashval(current_ownerid);
2600 INIT_LIST_HEAD(&sop->so_idhash);
2601 INIT_LIST_HEAD(&sop->so_strhash);
2602 INIT_LIST_HEAD(&sop->so_perclient);
2603 INIT_LIST_HEAD(&sop->so_perfilestate);
2604 INIT_LIST_HEAD(&sop->so_perlockowner);
2605 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2607 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2608 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2609 list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
2610 sop->so_is_open_owner = 0;
2611 sop->so_id = current_ownerid++;
2612 sop->so_client = clp;
2613 sop->so_seqid = lock->lk_new_lock_seqid - 1;
2614 sop->so_confirmed = 1;
2615 rp = &sop->so_replay;
2616 rp->rp_status = NFSERR_SERVERFAULT;
2618 rp->rp_buf = rp->rp_ibuf;
2622 struct nfs4_stateid *
2623 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2625 struct nfs4_stateid *stp;
2626 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2628 stp = nfs4_alloc_stateid();
2631 INIT_LIST_HEAD(&stp->st_hash);
2632 INIT_LIST_HEAD(&stp->st_perfile);
2633 INIT_LIST_HEAD(&stp->st_perfilestate);
2634 INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */
2635 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2636 list_add(&stp->st_perfile, &fp->fi_stateids);
2637 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
2638 stp->st_stateowner = sop;
2640 stp->st_stateid.si_boot = boot_time;
2641 stp->st_stateid.si_stateownerid = sop->so_id;
2642 stp->st_stateid.si_fileid = fp->fi_id;
2643 stp->st_stateid.si_generation = 0;
2644 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2645 stp->st_access_bmap = open_stp->st_access_bmap;
2646 stp->st_deny_bmap = open_stp->st_deny_bmap;
2653 check_lock_length(u64 offset, u64 length)
2655 return ((length == 0) || ((length != ~(u64)0) &&
2656 LOFF_OVERFLOW(offset, length)));
2663 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
2665 struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL;
2666 struct nfs4_stateid *lock_stp;
2668 struct file_lock file_lock;
2669 struct file_lock *conflock;
2671 unsigned int strhashval;
2673 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2674 (long long) lock->lk_offset,
2675 (long long) lock->lk_length);
2677 if (nfs4_in_grace() && !lock->lk_reclaim)
2678 return nfserr_grace;
2679 if (!nfs4_in_grace() && lock->lk_reclaim)
2680 return nfserr_no_grace;
2682 if (check_lock_length(lock->lk_offset, lock->lk_length))
2683 return nfserr_inval;
2687 if (lock->lk_is_new) {
2689 * Client indicates that this is a new lockowner.
2690 * Use open owner and open stateid to create lock owner and lock
2693 struct nfs4_stateid *open_stp = NULL;
2694 struct nfs4_file *fp;
2696 status = nfserr_stale_clientid;
2697 if (STALE_CLIENTID(&lock->lk_new_clientid)) {
2698 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2702 /* is the new lock seqid presented by the client zero? */
2703 status = nfserr_bad_seqid;
2704 if (lock->v.new.lock_seqid != 0)
2707 /* validate and update open stateid and open seqid */
2708 status = nfs4_preprocess_seqid_op(current_fh,
2709 lock->lk_new_open_seqid,
2710 &lock->lk_new_open_stateid,
2711 CHECK_FH | OPEN_STATE,
2712 &open_sop, &open_stp,
2713 &lock->v.new.clientid);
2715 if (lock->lk_reclaim)
2716 status = nfserr_reclaim_bad;
2719 /* create lockowner and lock stateid */
2720 fp = open_stp->st_file;
2721 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2722 open_sop->so_client->cl_clientid.cl_id,
2723 &lock->v.new.owner);
2725 * If we already have this lock owner, the client is in
2726 * error (or our bookeeping is wrong!)
2727 * for asking for a 'new lock'.
2729 status = nfserr_bad_stateid;
2730 lock_sop = find_lockstateowner(&lock->v.new.owner,
2731 &lock->v.new.clientid);
2734 status = nfserr_resource;
2735 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
2737 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
2738 fp, open_stp)) == NULL) {
2739 release_stateowner(lock->lk_stateowner);
2740 lock->lk_stateowner = NULL;
2743 /* bump the open seqid used to create the lock */
2744 open_sop->so_seqid++;
2746 /* lock (lock owner + lock stateid) already exists */
2747 status = nfs4_preprocess_seqid_op(current_fh,
2748 lock->lk_old_lock_seqid,
2749 &lock->lk_old_lock_stateid,
2750 CHECK_FH | LOCK_STATE,
2751 &lock->lk_stateowner, &lock_stp, NULL);
2755 /* lock->lk_stateowner and lock_stp have been created or found */
2756 filp = lock_stp->st_vfs_file;
2758 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2759 printk("NFSD: nfsd4_lock: permission denied!\n");
2763 locks_init_lock(&file_lock);
2764 switch (lock->lk_type) {
2767 file_lock.fl_type = F_RDLCK;
2770 case NFS4_WRITEW_LT:
2771 file_lock.fl_type = F_WRLCK;
2774 status = nfserr_inval;
2777 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
2778 file_lock.fl_pid = current->tgid;
2779 file_lock.fl_file = filp;
2780 file_lock.fl_flags = FL_POSIX;
2782 file_lock.fl_start = lock->lk_offset;
2783 if ((lock->lk_length == ~(u64)0) ||
2784 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2785 file_lock.fl_end = ~(u64)0;
2787 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2788 nfs4_transform_lock_offset(&file_lock);
2791 * Try to lock the file in the VFS.
2792 * Note: locks.c uses the BKL to protect the inode's lock list.
2795 status = posix_lock_file(filp, &file_lock);
2796 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2797 file_lock.fl_ops->fl_release_private(&file_lock);
2798 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status);
2800 case 0: /* success! */
2801 update_stateid(&lock_stp->st_stateid);
2802 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2806 goto conflicting_lock;
2808 status = nfserr_deadlock;
2810 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
2811 goto out_destroy_new_stateid;
2815 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2816 status = nfserr_denied;
2817 /* XXX There is a race here. Future patch needed to provide
2818 * an atomic posix_lock_and_test_file
2820 if (!(conflock = posix_test_lock(filp, &file_lock))) {
2821 status = nfserr_serverfault;
2824 nfs4_set_lock_denied(conflock, &lock->lk_denied);
2826 out_destroy_new_stateid:
2827 if (lock->lk_is_new) {
2828 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2830 * An error encountered after instantiation of the new
2831 * stateid has forced us to destroy it.
2833 if (!seqid_mutating_err(status))
2834 open_sop->so_seqid--;
2836 release_state_owner(lock_stp, LOCK_STATE);
2839 if (lock->lk_stateowner)
2840 nfs4_get_stateowner(lock->lk_stateowner);
2841 nfs4_unlock_state();
2849 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2851 struct inode *inode;
2853 struct file_lock file_lock;
2854 struct file_lock *conflicting_lock;
2857 if (nfs4_in_grace())
2858 return nfserr_grace;
2860 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2861 return nfserr_inval;
2863 lockt->lt_stateowner = NULL;
2866 status = nfserr_stale_clientid;
2867 if (STALE_CLIENTID(&lockt->lt_clientid)) {
2868 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2872 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2873 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2874 if (status == nfserr_symlink)
2875 status = nfserr_inval;
2879 inode = current_fh->fh_dentry->d_inode;
2880 locks_init_lock(&file_lock);
2881 switch (lockt->lt_type) {
2884 file_lock.fl_type = F_RDLCK;
2887 case NFS4_WRITEW_LT:
2888 file_lock.fl_type = F_WRLCK;
2891 printk("NFSD: nfs4_lockt: bad lock type!\n");
2892 status = nfserr_inval;
2896 lockt->lt_stateowner = find_lockstateowner_str(inode,
2897 &lockt->lt_clientid, &lockt->lt_owner);
2898 if (lockt->lt_stateowner)
2899 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2900 file_lock.fl_pid = current->tgid;
2901 file_lock.fl_flags = FL_POSIX;
2903 file_lock.fl_start = lockt->lt_offset;
2904 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2905 file_lock.fl_end = ~(u64)0;
2907 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2909 nfs4_transform_lock_offset(&file_lock);
2911 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2912 * since LOCKT doesn't require an OPEN, and therefore a struct
2913 * file may not exist, pass posix_test_lock a struct file with
2914 * only the dentry:inode set.
2916 memset(&file, 0, sizeof (struct file));
2917 file.f_dentry = current_fh->fh_dentry;
2920 conflicting_lock = posix_test_lock(&file, &file_lock);
2921 if (conflicting_lock) {
2922 status = nfserr_denied;
2923 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
2926 nfs4_unlock_state();
2931 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
2933 struct nfs4_stateid *stp;
2934 struct file *filp = NULL;
2935 struct file_lock file_lock;
2938 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2939 (long long) locku->lu_offset,
2940 (long long) locku->lu_length);
2942 if (check_lock_length(locku->lu_offset, locku->lu_length))
2943 return nfserr_inval;
2947 if ((status = nfs4_preprocess_seqid_op(current_fh,
2950 CHECK_FH | LOCK_STATE,
2951 &locku->lu_stateowner, &stp, NULL)))
2954 filp = stp->st_vfs_file;
2956 locks_init_lock(&file_lock);
2957 file_lock.fl_type = F_UNLCK;
2958 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2959 file_lock.fl_pid = current->tgid;
2960 file_lock.fl_file = filp;
2961 file_lock.fl_flags = FL_POSIX;
2962 file_lock.fl_start = locku->lu_offset;
2964 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2965 file_lock.fl_end = ~(u64)0;
2967 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2968 nfs4_transform_lock_offset(&file_lock);
2971 * Try to unlock the file in the VFS.
2973 status = posix_lock_file(filp, &file_lock);
2974 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2975 file_lock.fl_ops->fl_release_private(&file_lock);
2977 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2981 * OK, unlock succeeded; the only thing left to do is update the stateid.
2983 update_stateid(&stp->st_stateid);
2984 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2987 if (locku->lu_stateowner)
2988 nfs4_get_stateowner(locku->lu_stateowner);
2989 nfs4_unlock_state();
2993 status = nfserrno(status);
2999 * 1: locks held by lockowner
3000 * 0: no locks held by lockowner
3003 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
3005 struct file_lock **flpp;
3006 struct inode *inode = filp->f_dentry->d_inode;
3010 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
3011 if ((*flpp)->fl_owner == (fl_owner_t)lowner)
3021 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
3023 clientid_t *clid = &rlockowner->rl_clientid;
3024 struct nfs4_stateowner *local = NULL;
3025 struct xdr_netobj *owner = &rlockowner->rl_owner;
3028 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3029 clid->cl_boot, clid->cl_id);
3031 /* XXX check for lease expiration */
3033 status = nfserr_stale_clientid;
3034 if (STALE_CLIENTID(clid)) {
3035 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3042 local = find_lockstateowner(owner, clid);
3044 struct nfs4_stateid *stp;
3046 /* check for any locks held by any stateid
3047 * associated with the (lock) stateowner */
3048 status = nfserr_locks_held;
3049 list_for_each_entry(stp, &local->so_perfilestate,
3051 if (check_for_locks(stp->st_vfs_file, local))
3054 /* no locks held by (lock) stateowner */
3056 release_stateowner(local);
3059 nfs4_unlock_state();
3063 static inline struct nfs4_client_reclaim *
3064 alloc_reclaim(int namelen)
3066 struct nfs4_client_reclaim *crp = NULL;
3068 crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3071 crp->cr_name.data = kmalloc(namelen, GFP_KERNEL);
3072 if (!crp->cr_name.data) {
3080 * failure => all reset bets are off, nfserr_no_grace...
3083 nfs4_client_to_reclaim(char *name, int namlen)
3085 unsigned int strhashval;
3086 struct nfs4_client_reclaim *crp = NULL;
3088 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name);
3089 crp = alloc_reclaim(namlen);
3092 strhashval = clientstr_hashval(name, namlen);
3093 INIT_LIST_HEAD(&crp->cr_strhash);
3094 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3095 memcpy(crp->cr_name.data, name, namlen);
3096 crp->cr_name.len = namlen;
3097 reclaim_str_hashtbl_size++;
3102 nfs4_release_reclaim(void)
3104 struct nfs4_client_reclaim *crp = NULL;
3107 BUG_ON(!nfs4_reclaim_init);
3108 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3109 while (!list_empty(&reclaim_str_hashtbl[i])) {
3110 crp = list_entry(reclaim_str_hashtbl[i].next,
3111 struct nfs4_client_reclaim, cr_strhash);
3112 list_del(&crp->cr_strhash);
3113 kfree(crp->cr_name.data);
3115 reclaim_str_hashtbl_size--;
3118 BUG_ON(reclaim_str_hashtbl_size);
3122 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3123 struct nfs4_client_reclaim *
3124 nfs4_find_reclaim_client(clientid_t *clid)
3126 unsigned int strhashval;
3127 struct nfs4_client *clp;
3128 struct nfs4_client_reclaim *crp = NULL;
3131 /* find clientid in conf_id_hashtbl */
3132 clp = find_confirmed_client(clid);
3136 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
3137 clp->cl_name.len, clp->cl_name.data);
3139 /* find clp->cl_name in reclaim_str_hashtbl */
3140 strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len);
3141 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3142 if (cmp_name(&crp->cr_name, &clp->cl_name)) {
3150 * Called from OPEN. Look for clientid in reclaim list.
3153 nfs4_check_open_reclaim(clientid_t *clid)
3155 struct nfs4_client_reclaim *crp;
3157 if ((crp = nfs4_find_reclaim_client(clid)) == NULL)
3158 return nfserr_reclaim_bad;
3164 * Start and stop routines
3168 __nfs4_state_init(void)
3173 if (!nfs4_reclaim_init) {
3174 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3175 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3176 reclaim_str_hashtbl_size = 0;
3177 nfs4_reclaim_init = 1;
3179 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3180 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3181 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3182 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3183 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3185 for (i = 0; i < FILE_HASH_SIZE; i++) {
3186 INIT_LIST_HEAD(&file_hashtbl[i]);
3188 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3189 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3190 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3192 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3193 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3194 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3196 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3197 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3198 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3200 memset(&zerostateid, 0, sizeof(stateid_t));
3201 memset(&onestateid, ~0, sizeof(stateid_t));
3203 INIT_LIST_HEAD(&close_lru);
3204 INIT_LIST_HEAD(&client_lru);
3205 INIT_LIST_HEAD(&del_recall_lru);
3206 spin_lock_init(&recall_lock);
3207 boot_time = get_seconds();
3208 grace_time = max(old_lease_time, lease_time);
3209 if (reclaim_str_hashtbl_size == 0)
3212 printk("NFSD: starting %ld-second grace period\n", grace_time);
3213 grace_end = boot_time + grace_time;
3214 INIT_WORK(&laundromat_work,laundromat_main, NULL);
3215 schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ);
3219 nfs4_state_init(void)
3225 status = nfsd4_init_slabs();
3228 __nfs4_state_init();
3236 return get_seconds() < grace_end;
3242 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n");
3243 grace_end = get_seconds();
3247 nfs4_lease_time(void)
3253 __nfs4_state_shutdown(void)
3256 struct nfs4_client *clp = NULL;
3257 struct nfs4_delegation *dp = NULL;
3258 struct nfs4_stateowner *sop = NULL;
3259 struct list_head *pos, *next, reaplist;
3261 list_for_each_safe(pos, next, &close_lru) {
3262 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
3263 list_del(&sop->so_close_lru);
3264 nfs4_put_stateowner(sop);
3267 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3268 while (!list_empty(&conf_id_hashtbl[i])) {
3269 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3272 while (!list_empty(&unconf_str_hashtbl[i])) {
3273 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3277 INIT_LIST_HEAD(&reaplist);
3278 spin_lock(&recall_lock);
3279 list_for_each_safe(pos, next, &del_recall_lru) {
3280 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3281 list_move(&dp->dl_recall_lru, &reaplist);
3283 spin_unlock(&recall_lock);
3284 list_for_each_safe(pos, next, &reaplist) {
3285 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3286 list_del_init(&dp->dl_recall_lru);
3287 unhash_delegation(dp);
3290 release_all_files();
3291 cancel_delayed_work(&laundromat_work);
3292 flush_scheduled_work();
3297 nfs4_state_shutdown(void)
3300 nfs4_release_reclaim();
3301 __nfs4_state_shutdown();
3303 nfs4_unlock_state();
3307 * Called when leasetime is changed.
3309 * if nfsd is not started, simply set the global lease.
3311 * if nfsd(s) are running, lease change requires nfsv4 state to be reset.
3312 * e.g: boot_time is reset, existing nfs4_client structs are
3313 * used to fill reclaim_str_hashtbl, then all state (except for the
3314 * reclaim_str_hashtbl) is re-initialized.
3316 * if the old lease time is greater than the new lease time, the grace
3317 * period needs to be set to the old lease time to allow clients to reclaim
3318 * their state. XXX - we may want to set the grace period == lease time
3319 * after an initial grace period == old lease time
3321 * if an error occurs in this process, the new lease is set, but the server
3322 * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace
3323 * which means OPEN/LOCK/READ/WRITE will fail during grace period.
3325 * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and
3326 * OPEN and LOCK reclaims.
3329 nfs4_reset_lease(time_t leasetime)
3331 struct nfs4_client *clp;
3334 printk("NFSD: New leasetime %ld\n",leasetime);
3338 old_lease_time = lease_time;
3339 lease_time = leasetime;
3341 nfs4_release_reclaim();
3343 /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */
3344 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3345 list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) {
3346 if (!nfs4_client_to_reclaim(clp->cl_name.data,
3347 clp->cl_name.len)) {
3348 nfs4_release_reclaim();
3354 __nfs4_state_shutdown();
3355 __nfs4_state_init();
3356 nfs4_unlock_state();