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 user_lease_time = 90;
57 static time_t boot_time;
58 static int in_grace = 1;
59 static u32 current_clientid = 1;
60 static u32 current_ownerid = 1;
61 static u32 current_fileid = 1;
62 static u32 current_delegid = 1;
64 static stateid_t zerostateid; /* bits all 0 */
65 static stateid_t onestateid; /* bits all 1 */
67 #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t)))
68 #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t)))
70 /* forward declarations */
71 static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
72 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
73 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
74 extern char recovery_dirname[];
79 * protects clientid_hashtbl[], clientstr_hashtbl[],
80 * unconfstr_hashtbl[], uncofid_hashtbl[].
82 static DECLARE_MUTEX(client_sema);
84 static kmem_cache_t *stateowner_slab = NULL;
85 static kmem_cache_t *file_slab = NULL;
86 static kmem_cache_t *stateid_slab = NULL;
87 static kmem_cache_t *deleg_slab = NULL;
96 nfs4_unlock_state(void)
102 opaque_hashval(const void *ptr, int nbytes)
104 unsigned char *cptr = (unsigned char *) ptr;
114 /* forward declarations */
115 static void release_stateowner(struct nfs4_stateowner *sop);
116 static void release_stateid(struct nfs4_stateid *stp, int flags);
122 /* recall_lock protects the del_recall_lru */
123 static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED;
124 static struct list_head del_recall_lru;
127 free_nfs4_file(struct kref *kref)
129 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
130 list_del(&fp->fi_hash);
132 kmem_cache_free(file_slab, fp);
136 put_nfs4_file(struct nfs4_file *fi)
138 kref_put(&fi->fi_ref, free_nfs4_file);
142 get_nfs4_file(struct nfs4_file *fi)
144 kref_get(&fi->fi_ref);
147 static struct nfs4_delegation *
148 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
150 struct nfs4_delegation *dp;
151 struct nfs4_file *fp = stp->st_file;
152 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
154 dprintk("NFSD alloc_init_deleg\n");
155 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
158 INIT_LIST_HEAD(&dp->dl_perfile);
159 INIT_LIST_HEAD(&dp->dl_perclnt);
160 INIT_LIST_HEAD(&dp->dl_recall_lru);
165 get_file(stp->st_vfs_file);
166 dp->dl_vfs_file = stp->st_vfs_file;
168 dp->dl_recall.cbr_dp = NULL;
169 dp->dl_recall.cbr_ident = cb->cb_ident;
170 dp->dl_recall.cbr_trunc = 0;
171 dp->dl_stateid.si_boot = boot_time;
172 dp->dl_stateid.si_stateownerid = current_delegid++;
173 dp->dl_stateid.si_fileid = 0;
174 dp->dl_stateid.si_generation = 0;
175 dp->dl_fhlen = current_fh->fh_handle.fh_size;
176 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
177 current_fh->fh_handle.fh_size);
179 atomic_set(&dp->dl_count, 1);
180 list_add(&dp->dl_perfile, &fp->fi_delegations);
181 list_add(&dp->dl_perclnt, &clp->cl_delegations);
186 nfs4_put_delegation(struct nfs4_delegation *dp)
188 if (atomic_dec_and_test(&dp->dl_count)) {
189 dprintk("NFSD: freeing dp %p\n",dp);
190 put_nfs4_file(dp->dl_file);
191 kmem_cache_free(deleg_slab, dp);
195 /* Remove the associated file_lock first, then remove the delegation.
196 * lease_modify() is called to remove the FS_LEASE file_lock from
197 * the i_flock list, eventually calling nfsd's lock_manager
198 * fl_release_callback.
201 nfs4_close_delegation(struct nfs4_delegation *dp)
203 struct file *filp = dp->dl_vfs_file;
205 dprintk("NFSD: close_delegation dp %p\n",dp);
206 dp->dl_vfs_file = NULL;
207 /* The following nfsd_close may not actually close the file,
208 * but we want to remove the lease in any case. */
210 setlease(filp, F_UNLCK, &dp->dl_flock);
214 /* Called under the state lock. */
216 unhash_delegation(struct nfs4_delegation *dp)
218 list_del_init(&dp->dl_perfile);
219 list_del_init(&dp->dl_perclnt);
220 spin_lock(&recall_lock);
221 list_del_init(&dp->dl_recall_lru);
222 spin_unlock(&recall_lock);
223 nfs4_close_delegation(dp);
224 nfs4_put_delegation(dp);
231 /* Hash tables for nfs4_clientid state */
232 #define CLIENT_HASH_BITS 4
233 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
234 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
236 #define clientid_hashval(id) \
237 ((id) & CLIENT_HASH_MASK)
238 #define clientstr_hashval(name) \
239 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
241 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
242 * used in reboot/reset lease grace period processing
244 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
245 * setclientid_confirmed info.
247 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
250 * client_lru holds client queue ordered by nfs4_client.cl_time
253 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
254 * for last close replay.
256 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
257 static int reclaim_str_hashtbl_size = 0;
258 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
259 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
260 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
261 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
262 static struct list_head client_lru;
263 static struct list_head close_lru;
266 renew_client(struct nfs4_client *clp)
269 * Move client to the end to the LRU list.
271 dprintk("renewing client (clientid %08x/%08x)\n",
272 clp->cl_clientid.cl_boot,
273 clp->cl_clientid.cl_id);
274 list_move_tail(&clp->cl_lru, &client_lru);
275 clp->cl_time = get_seconds();
278 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
280 STALE_CLIENTID(clientid_t *clid)
282 if (clid->cl_boot == boot_time)
284 dprintk("NFSD stale clientid (%08x/%08x)\n",
285 clid->cl_boot, clid->cl_id);
290 * XXX Should we use a slab cache ?
291 * This type of memory management is somewhat inefficient, but we use it
292 * anyway since SETCLIENTID is not a common operation.
294 static inline struct nfs4_client *
295 alloc_client(struct xdr_netobj name)
297 struct nfs4_client *clp;
299 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
300 memset(clp, 0, sizeof(*clp));
301 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
302 memcpy(clp->cl_name.data, name.data, name.len);
303 clp->cl_name.len = name.len;
314 free_client(struct nfs4_client *clp)
316 if (clp->cl_cred.cr_group_info)
317 put_group_info(clp->cl_cred.cr_group_info);
318 kfree(clp->cl_name.data);
323 put_nfs4_client(struct nfs4_client *clp)
325 if (atomic_dec_and_test(&clp->cl_count))
330 expire_client(struct nfs4_client *clp)
332 struct nfs4_stateowner *sop;
333 struct nfs4_delegation *dp;
334 struct nfs4_callback *cb = &clp->cl_callback;
335 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
336 struct list_head reaplist;
338 dprintk("NFSD: expire_client cl_count %d\n",
339 atomic_read(&clp->cl_count));
341 /* shutdown rpc client, ending any outstanding recall rpcs */
342 if (atomic_read(&cb->cb_set) == 1 && clnt) {
343 rpc_shutdown_client(clnt);
344 clnt = clp->cl_callback.cb_client = NULL;
347 INIT_LIST_HEAD(&reaplist);
348 spin_lock(&recall_lock);
349 while (!list_empty(&clp->cl_delegations)) {
350 dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt);
351 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
353 list_del_init(&dp->dl_perclnt);
354 list_move(&dp->dl_recall_lru, &reaplist);
356 spin_unlock(&recall_lock);
357 while (!list_empty(&reaplist)) {
358 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
359 list_del_init(&dp->dl_recall_lru);
360 unhash_delegation(dp);
362 list_del(&clp->cl_idhash);
363 list_del(&clp->cl_strhash);
364 list_del(&clp->cl_lru);
365 while (!list_empty(&clp->cl_openowners)) {
366 sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient);
367 release_stateowner(sop);
369 put_nfs4_client(clp);
372 static struct nfs4_client *
373 create_client(struct xdr_netobj name, char *recdir) {
374 struct nfs4_client *clp;
376 if (!(clp = alloc_client(name)))
378 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
379 atomic_set(&clp->cl_count, 1);
380 atomic_set(&clp->cl_callback.cb_set, 0);
381 INIT_LIST_HEAD(&clp->cl_idhash);
382 INIT_LIST_HEAD(&clp->cl_strhash);
383 INIT_LIST_HEAD(&clp->cl_openowners);
384 INIT_LIST_HEAD(&clp->cl_delegations);
385 INIT_LIST_HEAD(&clp->cl_lru);
391 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
392 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
396 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
397 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
398 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
402 copy_cred(struct svc_cred *target, struct svc_cred *source) {
404 target->cr_uid = source->cr_uid;
405 target->cr_gid = source->cr_gid;
406 target->cr_group_info = source->cr_group_info;
407 get_group_info(target->cr_group_info);
411 same_name(const char *n1, const char *n2) {
412 return 0 == memcmp(n1, n2, HEXDIR_LEN);
416 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
417 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
421 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
422 return((cl1->cl_boot == cl2->cl_boot) &&
423 (cl1->cl_id == cl2->cl_id));
426 /* XXX what about NGROUP */
428 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
429 return(cr1->cr_uid == cr2->cr_uid);
434 gen_clid(struct nfs4_client *clp) {
435 clp->cl_clientid.cl_boot = boot_time;
436 clp->cl_clientid.cl_id = current_clientid++;
440 gen_confirm(struct nfs4_client *clp) {
445 p = (u32 *)clp->cl_confirm.data;
451 check_name(struct xdr_netobj name) {
455 if (name.len > NFS4_OPAQUE_LIMIT) {
456 printk("NFSD: check_name: name too long(%d)!\n", name.len);
463 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
465 unsigned int idhashval;
467 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
468 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
469 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
470 list_add_tail(&clp->cl_lru, &client_lru);
471 clp->cl_time = get_seconds();
475 move_to_confirmed(struct nfs4_client *clp)
477 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
478 unsigned int strhashval;
480 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
481 list_del_init(&clp->cl_strhash);
482 list_del_init(&clp->cl_idhash);
483 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
484 strhashval = clientstr_hashval(clp->cl_recdir);
485 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
489 static struct nfs4_client *
490 find_confirmed_client(clientid_t *clid)
492 struct nfs4_client *clp;
493 unsigned int idhashval = clientid_hashval(clid->cl_id);
495 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
496 if (cmp_clid(&clp->cl_clientid, clid))
502 static struct nfs4_client *
503 find_unconfirmed_client(clientid_t *clid)
505 struct nfs4_client *clp;
506 unsigned int idhashval = clientid_hashval(clid->cl_id);
508 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
509 if (cmp_clid(&clp->cl_clientid, clid))
515 static struct nfs4_client *
516 find_confirmed_client_by_str(const char *dname, unsigned int hashval)
518 struct nfs4_client *clp;
520 list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) {
521 if (same_name(clp->cl_recdir, dname))
527 static struct nfs4_client *
528 find_unconfirmed_client_by_str(const char *dname, unsigned int hashval)
530 struct nfs4_client *clp;
532 list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) {
533 if (same_name(clp->cl_recdir, dname))
539 /* a helper function for parse_callback */
541 parse_octet(unsigned int *lenp, char **addrp)
543 unsigned int len = *lenp;
555 if ((c < '0') || (c > '9')) {
561 n = (n * 10) + (c - '0');
572 /* parse and set the setclientid ipv4 callback address */
574 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
579 u32 addrlen = addr_len;
580 char *addr = addr_val;
585 for(i = 4; i > 0 ; i--) {
586 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
589 cbaddr |= (temp << shift);
597 for(i = 2; i > 0 ; i--) {
598 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
601 cbport |= (temp << shift);
610 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
612 struct nfs4_callback *cb = &clp->cl_callback;
614 /* Currently, we only support tcp for the callback channel */
615 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
618 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
619 &cb->cb_addr, &cb->cb_port)))
621 cb->cb_prog = se->se_callback_prog;
622 cb->cb_ident = se->se_callback_ident;
625 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
626 "will not receive delegations\n",
627 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
633 * RFC 3010 has a complex implmentation description of processing a
634 * SETCLIENTID request consisting of 5 bullets, labeled as
635 * CASE0 - CASE4 below.
638 * callback information will be processed in a future patch
640 * an unconfirmed record is added when:
641 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
642 * CASE 1: confirmed record found with matching name, principal,
643 * verifier, and clientid.
644 * CASE 2: confirmed record found with matching name, principal,
645 * and there is no unconfirmed record with matching
648 * an unconfirmed record is replaced when:
649 * CASE 3: confirmed record found with matching name, principal,
650 * and an unconfirmed record is found with matching
651 * name, principal, and with clientid and
652 * confirm that does not match the confirmed record.
653 * CASE 4: there is no confirmed record with matching name and
654 * principal. there is an unconfirmed record with
655 * matching name, principal.
657 * an unconfirmed record is deleted when:
658 * CASE 1: an unconfirmed record that matches input name, verifier,
659 * and confirmed clientid.
660 * CASE 4: any unconfirmed records with matching name and principal
661 * that exist after an unconfirmed record has been replaced
662 * as described above.
666 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
668 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
669 struct xdr_netobj clname = {
670 .len = setclid->se_namelen,
671 .data = setclid->se_name,
673 nfs4_verifier clverifier = setclid->se_verf;
674 unsigned int strhashval;
675 struct nfs4_client *conf, *unconf, *new;
677 char dname[HEXDIR_LEN];
679 status = nfserr_inval;
680 if (!check_name(clname))
683 status = nfs4_make_rec_clidname(dname, &clname);
688 * XXX The Duplicate Request Cache (DRC) has been checked (??)
689 * We get here on a DRC miss.
692 strhashval = clientstr_hashval(dname);
695 conf = find_confirmed_client_by_str(dname, strhashval);
699 * clname match, confirmed, different principal
700 * or different ip_address
702 status = nfserr_clid_inuse;
703 if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred)
704 || conf->cl_addr != ip_addr) {
705 printk("NFSD: setclientid: string in use by client"
706 "(clientid %08x/%08x)\n",
707 conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id);
711 unconf = find_unconfirmed_client_by_str(dname, strhashval);
712 status = nfserr_resource;
716 * placed first, because it is the normal case.
719 expire_client(unconf);
720 new = create_client(clname, dname);
723 copy_verf(new, &clverifier);
724 new->cl_addr = ip_addr;
725 copy_cred(&new->cl_cred,&rqstp->rq_cred);
728 gen_callback(new, setclid);
729 add_to_unconfirmed(new, strhashval);
730 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
733 * cl_name match, confirmed, principal match
734 * verifier match: probable callback update
736 * remove any unconfirmed nfs4_client with
737 * matching cl_name, cl_verifier, and cl_clientid
739 * create and insert an unconfirmed nfs4_client with same
740 * cl_name, cl_verifier, and cl_clientid as existing
741 * nfs4_client, but with the new callback info and a
745 /* Note this is removing unconfirmed {*x***},
746 * which is stronger than RFC recommended {vxc**}.
747 * This has the advantage that there is at most
748 * one {*x***} in either list at any time.
750 expire_client(unconf);
752 new = create_client(clname, dname);
755 copy_verf(new,&conf->cl_verifier);
756 new->cl_addr = ip_addr;
757 copy_cred(&new->cl_cred,&rqstp->rq_cred);
758 copy_clid(new, conf);
760 gen_callback(new, setclid);
761 add_to_unconfirmed(new,strhashval);
762 } else if (!unconf) {
765 * clname match, confirmed, principal match
766 * verfier does not match
767 * no unconfirmed. create a new unconfirmed nfs4_client
768 * using input clverifier, clname, and callback info
769 * and generate a new cl_clientid and cl_confirm.
771 new = create_client(clname, dname);
774 copy_verf(new,&clverifier);
775 new->cl_addr = ip_addr;
776 copy_cred(&new->cl_cred,&rqstp->rq_cred);
779 gen_callback(new, setclid);
780 add_to_unconfirmed(new, strhashval);
781 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
784 * confirmed found (name, principal match)
785 * confirmed verifier does not match input clverifier
787 * unconfirmed found (name match)
788 * confirmed->cl_confirm != unconfirmed->cl_confirm
790 * remove unconfirmed.
792 * create an unconfirmed nfs4_client
793 * with same cl_name as existing confirmed nfs4_client,
794 * but with new callback info, new cl_clientid,
795 * new cl_verifier and a new cl_confirm
797 expire_client(unconf);
798 new = create_client(clname, dname);
801 copy_verf(new,&clverifier);
802 new->cl_addr = ip_addr;
803 copy_cred(&new->cl_cred,&rqstp->rq_cred);
806 gen_callback(new, setclid);
807 add_to_unconfirmed(new, strhashval);
809 /* No cases hit !!! */
810 status = nfserr_inval;
814 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
815 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
816 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
825 * RFC 3010 has a complex implmentation description of processing a
826 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
827 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
829 * NOTE: callback information will be processed here in a future patch
832 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
834 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
835 struct nfs4_client *conf, *unconf;
836 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
837 clientid_t * clid = &setclientid_confirm->sc_clientid;
840 if (STALE_CLIENTID(clid))
841 return nfserr_stale_clientid;
843 * XXX The Duplicate Request Cache (DRC) has been checked (??)
844 * We get here on a DRC miss.
849 conf = find_confirmed_client(clid);
850 unconf = find_unconfirmed_client(clid);
852 status = nfserr_clid_inuse;
853 if (conf && conf->cl_addr != ip_addr)
855 if (unconf && unconf->cl_addr != ip_addr)
858 if ((conf && unconf) &&
859 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
860 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
861 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
862 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
864 * unconf record that matches input clientid and input confirm.
865 * conf record that matches input clientid.
866 * conf and unconf records match names, verifiers
868 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
869 status = nfserr_clid_inuse;
871 /* XXX: We just turn off callbacks until we can handle
872 * change request correctly. */
873 atomic_set(&conf->cl_callback.cb_set, 0);
875 expire_client(unconf);
879 } else if ((conf && !unconf) ||
881 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
882 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
884 * conf record that matches input clientid.
885 * if unconf record matches input clientid, then
886 * unconf->cl_name or unconf->cl_verifier don't match the
889 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred))
890 status = nfserr_clid_inuse;
893 } else if (!conf && unconf
894 && cmp_verf(&unconf->cl_confirm, &confirm)) {
896 * conf record not found.
897 * unconf record found.
898 * unconf->cl_confirm matches input confirm
900 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
901 status = nfserr_clid_inuse;
904 clientstr_hashval(unconf->cl_recdir);
905 conf = find_confirmed_client_by_str(unconf->cl_recdir,
908 nfsd4_remove_clid_dir(conf);
911 move_to_confirmed(unconf);
915 } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm)))
916 && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm,
919 * conf record not found, or if conf, conf->cl_confirm does not
920 * match input confirm.
921 * unconf record not found, or if unconf, unconf->cl_confirm
922 * does not match input confirm.
924 status = nfserr_stale_clientid;
926 /* check that we have hit one of the cases...*/
927 status = nfserr_clid_inuse;
931 nfsd4_probe_callback(conf);
937 * Open owner state (share locks)
940 /* hash tables for nfs4_stateowner */
941 #define OWNER_HASH_BITS 8
942 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
943 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
945 #define ownerid_hashval(id) \
946 ((id) & OWNER_HASH_MASK)
947 #define ownerstr_hashval(clientid, ownername) \
948 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
950 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
951 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
953 /* hash table for nfs4_file */
954 #define FILE_HASH_BITS 8
955 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
956 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
957 /* hash table for (open)nfs4_stateid */
958 #define STATEID_HASH_BITS 10
959 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
960 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
962 #define file_hashval(x) \
963 hash_ptr(x, FILE_HASH_BITS)
964 #define stateid_hashval(owner_id, file_id) \
965 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
967 static struct list_head file_hashtbl[FILE_HASH_SIZE];
968 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
970 /* OPEN Share state helper functions */
971 static inline struct nfs4_file *
972 alloc_init_file(struct inode *ino)
974 struct nfs4_file *fp;
975 unsigned int hashval = file_hashval(ino);
977 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
979 kref_init(&fp->fi_ref);
980 INIT_LIST_HEAD(&fp->fi_hash);
981 INIT_LIST_HEAD(&fp->fi_stateids);
982 INIT_LIST_HEAD(&fp->fi_delegations);
983 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
984 fp->fi_inode = igrab(ino);
985 fp->fi_id = current_fileid++;
992 nfsd4_free_slab(kmem_cache_t **slab)
998 status = kmem_cache_destroy(*slab);
1004 nfsd4_free_slabs(void)
1006 nfsd4_free_slab(&stateowner_slab);
1007 nfsd4_free_slab(&file_slab);
1008 nfsd4_free_slab(&stateid_slab);
1009 nfsd4_free_slab(&deleg_slab);
1013 nfsd4_init_slabs(void)
1015 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1016 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1017 if (stateowner_slab == NULL)
1019 file_slab = kmem_cache_create("nfsd4_files",
1020 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1021 if (file_slab == NULL)
1023 stateid_slab = kmem_cache_create("nfsd4_stateids",
1024 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1025 if (stateid_slab == NULL)
1027 deleg_slab = kmem_cache_create("nfsd4_delegations",
1028 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1029 if (deleg_slab == NULL)
1034 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1039 nfs4_free_stateowner(struct kref *kref)
1041 struct nfs4_stateowner *sop =
1042 container_of(kref, struct nfs4_stateowner, so_ref);
1043 kfree(sop->so_owner.data);
1044 kmem_cache_free(stateowner_slab, sop);
1047 static inline struct nfs4_stateowner *
1048 alloc_stateowner(struct xdr_netobj *owner)
1050 struct nfs4_stateowner *sop;
1052 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1053 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1054 memcpy(sop->so_owner.data, owner->data, owner->len);
1055 sop->so_owner.len = owner->len;
1056 kref_init(&sop->so_ref);
1059 kmem_cache_free(stateowner_slab, sop);
1064 static struct nfs4_stateowner *
1065 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1066 struct nfs4_stateowner *sop;
1067 struct nfs4_replay *rp;
1068 unsigned int idhashval;
1070 if (!(sop = alloc_stateowner(&open->op_owner)))
1072 idhashval = ownerid_hashval(current_ownerid);
1073 INIT_LIST_HEAD(&sop->so_idhash);
1074 INIT_LIST_HEAD(&sop->so_strhash);
1075 INIT_LIST_HEAD(&sop->so_perclient);
1076 INIT_LIST_HEAD(&sop->so_stateids);
1077 INIT_LIST_HEAD(&sop->so_perstateid); /* not used */
1078 INIT_LIST_HEAD(&sop->so_close_lru);
1080 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1081 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1082 list_add(&sop->so_perclient, &clp->cl_openowners);
1083 sop->so_is_open_owner = 1;
1084 sop->so_id = current_ownerid++;
1085 sop->so_client = clp;
1086 sop->so_seqid = open->op_seqid;
1087 sop->so_confirmed = 0;
1088 rp = &sop->so_replay;
1089 rp->rp_status = NFSERR_SERVERFAULT;
1091 rp->rp_buf = rp->rp_ibuf;
1096 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1098 struct nfs4_stateowner *lock_sop;
1100 while (!list_empty(&open_stp->st_lockowners)) {
1101 lock_sop = list_entry(open_stp->st_lockowners.next,
1102 struct nfs4_stateowner, so_perstateid);
1103 /* list_del(&open_stp->st_lockowners); */
1104 BUG_ON(lock_sop->so_is_open_owner);
1105 release_stateowner(lock_sop);
1110 unhash_stateowner(struct nfs4_stateowner *sop)
1112 struct nfs4_stateid *stp;
1114 list_del(&sop->so_idhash);
1115 list_del(&sop->so_strhash);
1116 if (sop->so_is_open_owner)
1117 list_del(&sop->so_perclient);
1118 list_del(&sop->so_perstateid);
1119 while (!list_empty(&sop->so_stateids)) {
1120 stp = list_entry(sop->so_stateids.next,
1121 struct nfs4_stateid, st_perstateowner);
1122 if (sop->so_is_open_owner)
1123 release_stateid(stp, OPEN_STATE);
1125 release_stateid(stp, LOCK_STATE);
1130 release_stateowner(struct nfs4_stateowner *sop)
1132 unhash_stateowner(sop);
1133 list_del(&sop->so_close_lru);
1134 nfs4_put_stateowner(sop);
1138 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1139 struct nfs4_stateowner *sop = open->op_stateowner;
1140 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1142 INIT_LIST_HEAD(&stp->st_hash);
1143 INIT_LIST_HEAD(&stp->st_perstateowner);
1144 INIT_LIST_HEAD(&stp->st_lockowners);
1145 INIT_LIST_HEAD(&stp->st_perfile);
1146 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1147 list_add(&stp->st_perstateowner, &sop->so_stateids);
1148 list_add(&stp->st_perfile, &fp->fi_stateids);
1149 stp->st_stateowner = sop;
1152 stp->st_stateid.si_boot = boot_time;
1153 stp->st_stateid.si_stateownerid = sop->so_id;
1154 stp->st_stateid.si_fileid = fp->fi_id;
1155 stp->st_stateid.si_generation = 0;
1156 stp->st_access_bmap = 0;
1157 stp->st_deny_bmap = 0;
1158 __set_bit(open->op_share_access, &stp->st_access_bmap);
1159 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1163 release_stateid(struct nfs4_stateid *stp, int flags)
1165 struct file *filp = stp->st_vfs_file;
1167 list_del(&stp->st_hash);
1168 list_del(&stp->st_perfile);
1169 list_del(&stp->st_perstateowner);
1170 if (flags & OPEN_STATE) {
1171 release_stateid_lockowners(stp);
1172 stp->st_vfs_file = NULL;
1174 } else if (flags & LOCK_STATE)
1175 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1176 put_nfs4_file(stp->st_file);
1177 kmem_cache_free(stateid_slab, stp);
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;
1196 dprintk("NFSD: release_state_owner\n");
1197 release_stateid(stp, flag);
1199 /* place unused nfs4_stateowners on so_close_lru list to be
1200 * released by the laundromat service after the lease period
1201 * to enable us to handle CLOSE replay
1203 if (sop->so_confirmed && list_empty(&sop->so_stateids))
1204 move_to_close_lru(sop);
1208 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1209 return ((sop->so_owner.len == owner->len) &&
1210 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1211 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1214 static struct nfs4_stateowner *
1215 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1217 struct nfs4_stateowner *so = NULL;
1219 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1220 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1226 /* search file_hashtbl[] for file */
1227 static struct nfs4_file *
1228 find_file(struct inode *ino)
1230 unsigned int hashval = file_hashval(ino);
1231 struct nfs4_file *fp;
1233 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1234 if (fp->fi_inode == ino) {
1242 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1243 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1246 set_access(unsigned int *access, unsigned long bmap) {
1250 for (i = 1; i < 4; i++) {
1251 if (test_bit(i, &bmap))
1257 set_deny(unsigned int *deny, unsigned long bmap) {
1261 for (i = 0; i < 4; i++) {
1262 if (test_bit(i, &bmap))
1268 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1269 unsigned int access, deny;
1271 set_access(&access, stp->st_access_bmap);
1272 set_deny(&deny, stp->st_deny_bmap);
1273 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1279 * Called to check deny when READ with all zero stateid or
1280 * WRITE with all zero or all one stateid
1283 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1285 struct inode *ino = current_fh->fh_dentry->d_inode;
1286 struct nfs4_file *fp;
1287 struct nfs4_stateid *stp;
1290 dprintk("NFSD: nfs4_share_conflict\n");
1292 fp = find_file(ino);
1295 ret = nfserr_share_denied;
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))
1309 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1311 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1312 put_write_access(filp->f_dentry->d_inode);
1313 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1318 * Recall a delegation
1321 do_recall(void *__dp)
1323 struct nfs4_delegation *dp = __dp;
1325 daemonize("nfsv4-recall");
1327 nfsd4_cb_recall(dp);
1332 * Spawn a thread to perform a recall on the delegation represented
1333 * by the lease (file_lock)
1335 * Called from break_lease() with lock_kernel() held.
1336 * Note: we assume break_lease will only call this *once* for any given
1340 void nfsd_break_deleg_cb(struct file_lock *fl)
1342 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1343 struct task_struct *t;
1345 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1349 /* We're assuming the state code never drops its reference
1350 * without first removing the lease. Since we're in this lease
1351 * callback (and since the lease code is serialized by the kernel
1352 * lock) we know the server hasn't removed the lease yet, we know
1353 * it's safe to take a reference: */
1354 atomic_inc(&dp->dl_count);
1356 spin_lock(&recall_lock);
1357 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1358 spin_unlock(&recall_lock);
1360 /* only place dl_time is set. protected by lock_kernel*/
1361 dp->dl_time = get_seconds();
1363 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1364 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1366 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1368 struct nfs4_client *clp = dp->dl_client;
1370 printk(KERN_INFO "NFSD: Callback thread failed for "
1371 "for client (clientid %08x/%08x)\n",
1372 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1373 nfs4_put_delegation(dp);
1378 * The file_lock is being reapd.
1380 * Called by locks_free_lock() with lock_kernel() held.
1383 void nfsd_release_deleg_cb(struct file_lock *fl)
1385 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1387 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1389 if (!(fl->fl_flags & FL_LEASE) || !dp)
1391 dp->dl_flock = NULL;
1395 * Set the delegation file_lock back pointer.
1397 * Called from __setlease() with lock_kernel() held.
1400 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1402 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1404 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1411 * Called from __setlease() with lock_kernel() held
1414 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1416 struct nfs4_delegation *onlistd =
1417 (struct nfs4_delegation *)onlist->fl_owner;
1418 struct nfs4_delegation *tryd =
1419 (struct nfs4_delegation *)try->fl_owner;
1421 if (onlist->fl_lmops != try->fl_lmops)
1424 return onlistd->dl_client == tryd->dl_client;
1429 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1432 return lease_modify(onlist, arg);
1437 static struct lock_manager_operations nfsd_lease_mng_ops = {
1438 .fl_break = nfsd_break_deleg_cb,
1439 .fl_release_private = nfsd_release_deleg_cb,
1440 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1441 .fl_mylease = nfsd_same_client_deleg_cb,
1442 .fl_change = nfsd_change_deleg_cb,
1447 * nfsd4_process_open1()
1448 * lookup stateowner.
1460 * called with nfs4_lock_state() held.
1463 nfsd4_process_open1(struct nfsd4_open *open)
1466 clientid_t *clientid = &open->op_clientid;
1467 struct nfs4_client *clp = NULL;
1468 unsigned int strhashval;
1469 struct nfs4_stateowner *sop = NULL;
1471 status = nfserr_inval;
1472 if (!check_name(open->op_owner))
1475 if (STALE_CLIENTID(&open->op_clientid))
1476 return nfserr_stale_clientid;
1478 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1479 sop = find_openstateowner_str(strhashval, open);
1481 open->op_stateowner = sop;
1482 /* check for replay */
1483 if (open->op_seqid == sop->so_seqid){
1484 if (sop->so_replay.rp_buflen)
1485 return NFSERR_REPLAY_ME;
1487 /* The original OPEN failed so spectacularly
1488 * that we don't even have replay data saved!
1489 * Therefore, we have no choice but to continue
1490 * processing this OPEN; presumably, we'll
1491 * fail again for the same reason.
1493 dprintk("nfsd4_process_open1:"
1494 " replay with no replay cache\n");
1497 } else if (sop->so_confirmed) {
1498 if (open->op_seqid == sop->so_seqid + 1)
1500 status = nfserr_bad_seqid;
1503 /* If we get here, we received an OPEN for an
1504 * unconfirmed nfs4_stateowner. Since the seqid's are
1505 * different, purge the existing nfs4_stateowner, and
1506 * instantiate a new one.
1508 clp = sop->so_client;
1509 release_stateowner(sop);
1512 /* nfs4_stateowner not found.
1513 * Verify clientid and instantiate new nfs4_stateowner.
1514 * If verify fails this is presumably the result of the
1515 * client's lease expiring.
1517 status = nfserr_expired;
1518 clp = find_confirmed_client(clientid);
1522 status = nfserr_resource;
1523 sop = alloc_init_open_stateowner(strhashval, clp, open);
1526 open->op_stateowner = sop;
1529 renew_client(sop->so_client);
1531 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1532 status = nfserr_reclaim_bad;
1537 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1539 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1540 return nfserr_openmode;
1545 static struct nfs4_delegation *
1546 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1548 struct nfs4_delegation *dp;
1550 list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) {
1551 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1558 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1559 struct nfs4_delegation **dp)
1562 int status = nfserr_bad_stateid;
1564 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1567 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1568 RD_STATE : WR_STATE;
1569 status = nfs4_check_delegmode(*dp, flags);
1573 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1577 open->op_stateowner->so_confirmed = 1;
1582 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1584 struct nfs4_stateid *local;
1585 int status = nfserr_share_denied;
1586 struct nfs4_stateowner *sop = open->op_stateowner;
1588 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1589 /* ignore lock owners */
1590 if (local->st_stateowner->so_is_open_owner == 0)
1592 /* remember if we have seen this open owner */
1593 if (local->st_stateowner == sop)
1595 /* check for conflicting share reservations */
1596 if (!test_share(local, open))
1604 static inline struct nfs4_stateid *
1605 nfs4_alloc_stateid(void)
1607 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1611 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1612 struct nfs4_delegation *dp,
1613 struct svc_fh *cur_fh, int flags)
1615 struct nfs4_stateid *stp;
1617 stp = nfs4_alloc_stateid();
1619 return nfserr_resource;
1622 get_file(dp->dl_vfs_file);
1623 stp->st_vfs_file = dp->dl_vfs_file;
1626 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1629 if (status == nfserr_dropit)
1630 status = nfserr_jukebox;
1631 kmem_cache_free(stateid_slab, stp);
1640 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1641 struct nfsd4_open *open)
1643 struct iattr iattr = {
1644 .ia_valid = ATTR_SIZE,
1647 if (!open->op_truncate)
1649 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1651 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1655 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1657 struct file *filp = stp->st_vfs_file;
1658 struct inode *inode = filp->f_dentry->d_inode;
1659 unsigned int share_access;
1662 set_access(&share_access, stp->st_access_bmap);
1663 share_access = ~share_access;
1664 share_access &= open->op_share_access;
1666 if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
1667 return nfsd4_truncate(rqstp, cur_fh, open);
1669 status = get_write_access(inode);
1671 return nfserrno(status);
1672 status = nfsd4_truncate(rqstp, cur_fh, open);
1674 put_write_access(inode);
1677 /* remember the open */
1678 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
1679 set_bit(open->op_share_access, &stp->st_access_bmap);
1680 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1686 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1688 nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
1690 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
1692 *status = nfserr_reclaim_bad;
1694 open->op_stateowner->so_confirmed = 1;
1695 open->op_stateowner->so_client->cl_firststate = 1;
1696 open->op_stateowner->so_seqid--;
1702 * Attempt to hand out a delegation.
1705 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1707 struct nfs4_delegation *dp;
1708 struct nfs4_stateowner *sop = stp->st_stateowner;
1709 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1710 struct file_lock fl, *flp = &fl;
1711 int status, flag = 0;
1713 flag = NFS4_OPEN_DELEGATE_NONE;
1714 open->op_recall = 0;
1715 switch (open->op_claim_type) {
1716 case NFS4_OPEN_CLAIM_PREVIOUS:
1717 if (!atomic_read(&cb->cb_set))
1718 open->op_recall = 1;
1719 flag = open->op_delegate_type;
1720 if (flag == NFS4_OPEN_DELEGATE_NONE)
1723 case NFS4_OPEN_CLAIM_NULL:
1724 /* Let's not give out any delegations till everyone's
1725 * had the chance to reclaim theirs.... */
1726 if (nfs4_in_grace())
1728 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1730 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1731 flag = NFS4_OPEN_DELEGATE_WRITE;
1733 flag = NFS4_OPEN_DELEGATE_READ;
1739 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1741 flag = NFS4_OPEN_DELEGATE_NONE;
1744 locks_init_lock(&fl);
1745 fl.fl_lmops = &nfsd_lease_mng_ops;
1746 fl.fl_flags = FL_LEASE;
1747 fl.fl_end = OFFSET_MAX;
1748 fl.fl_owner = (fl_owner_t)dp;
1749 fl.fl_file = stp->st_vfs_file;
1750 fl.fl_pid = current->tgid;
1752 /* setlease checks to see if delegation should be handed out.
1753 * the lock_manager callbacks fl_mylease and fl_change are used
1755 if ((status = setlease(stp->st_vfs_file,
1756 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1757 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1758 unhash_delegation(dp);
1759 flag = NFS4_OPEN_DELEGATE_NONE;
1763 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1765 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1766 dp->dl_stateid.si_boot,
1767 dp->dl_stateid.si_stateownerid,
1768 dp->dl_stateid.si_fileid,
1769 dp->dl_stateid.si_generation);
1771 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1772 && flag == NFS4_OPEN_DELEGATE_NONE
1773 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1774 printk("NFSD: WARNING: refusing delegation reclaim\n");
1775 open->op_delegate_type = flag;
1779 * called with nfs4_lock_state() held.
1782 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1784 struct nfs4_file *fp = NULL;
1785 struct inode *ino = current_fh->fh_dentry->d_inode;
1786 struct nfs4_stateid *stp = NULL;
1787 struct nfs4_delegation *dp = NULL;
1790 status = nfserr_inval;
1791 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
1794 * Lookup file; if found, lookup stateid and check open request,
1795 * and check for delegations in the process of being recalled.
1796 * If not found, create the nfs4_file struct
1798 fp = find_file(ino);
1800 if ((status = nfs4_check_open(fp, open, &stp)))
1802 status = nfs4_check_deleg(fp, open, &dp);
1806 status = nfserr_bad_stateid;
1807 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1809 status = nfserr_resource;
1810 fp = alloc_init_file(ino);
1816 * OPEN the file, or upgrade an existing OPEN.
1817 * If truncate fails, the OPEN fails.
1820 /* Stateid was found, this is an OPEN upgrade */
1821 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1825 /* Stateid was not found, this is a new OPEN */
1827 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1831 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1834 init_stateid(stp, fp, open);
1835 status = nfsd4_truncate(rqstp, current_fh, open);
1837 release_stateid(stp, OPEN_STATE);
1841 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1844 * Attempt to hand out a delegation. No error return, because the
1845 * OPEN succeeds even if we fail.
1847 nfs4_open_delegation(current_fh, open, stp);
1851 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1852 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1853 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1857 /* CLAIM_PREVIOUS has different error returns */
1858 nfs4_set_claim_prev(open, &status);
1860 * To finish the open response, we just need to set the rflags.
1862 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1863 if (!open->op_stateowner->so_confirmed)
1864 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1869 static struct workqueue_struct *laundry_wq;
1870 static struct work_struct laundromat_work;
1871 static void laundromat_main(void *);
1872 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1875 nfsd4_renew(clientid_t *clid)
1877 struct nfs4_client *clp;
1881 dprintk("process_renew(%08x/%08x): starting\n",
1882 clid->cl_boot, clid->cl_id);
1883 status = nfserr_stale_clientid;
1884 if (STALE_CLIENTID(clid))
1886 clp = find_confirmed_client(clid);
1887 status = nfserr_expired;
1889 /* We assume the client took too long to RENEW. */
1890 dprintk("nfsd4_renew: clientid not found!\n");
1894 status = nfserr_cb_path_down;
1895 if (!list_empty(&clp->cl_delegations)
1896 && !atomic_read(&clp->cl_callback.cb_set))
1900 nfs4_unlock_state();
1907 dprintk("NFSD: end of grace period\n");
1908 nfsd4_recdir_purge_old();
1913 nfs4_laundromat(void)
1915 struct nfs4_client *clp;
1916 struct nfs4_stateowner *sop;
1917 struct nfs4_delegation *dp;
1918 struct list_head *pos, *next, reaplist;
1919 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1920 time_t t, clientid_val = NFSD_LEASE_TIME;
1921 time_t u, test_val = NFSD_LEASE_TIME;
1925 dprintk("NFSD: laundromat service - starting\n");
1928 list_for_each_safe(pos, next, &client_lru) {
1929 clp = list_entry(pos, struct nfs4_client, cl_lru);
1930 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1931 t = clp->cl_time - cutoff;
1932 if (clientid_val > t)
1936 dprintk("NFSD: purging unused client (clientid %08x)\n",
1937 clp->cl_clientid.cl_id);
1938 nfsd4_remove_clid_dir(clp);
1941 INIT_LIST_HEAD(&reaplist);
1942 spin_lock(&recall_lock);
1943 list_for_each_safe(pos, next, &del_recall_lru) {
1944 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1945 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1946 u = dp->dl_time - cutoff;
1951 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1953 list_move(&dp->dl_recall_lru, &reaplist);
1955 spin_unlock(&recall_lock);
1956 list_for_each_safe(pos, next, &reaplist) {
1957 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1958 list_del_init(&dp->dl_recall_lru);
1959 unhash_delegation(dp);
1961 test_val = NFSD_LEASE_TIME;
1962 list_for_each_safe(pos, next, &close_lru) {
1963 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1964 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1965 u = sop->so_time - cutoff;
1970 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1972 list_del(&sop->so_close_lru);
1973 nfs4_put_stateowner(sop);
1975 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1976 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1977 nfs4_unlock_state();
1978 return clientid_val;
1982 laundromat_main(void *not_used)
1986 t = nfs4_laundromat();
1987 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1988 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1991 /* search ownerid_hashtbl[] and close_lru for stateid owner
1992 * (stateid->si_stateownerid)
1994 static struct nfs4_stateowner *
1995 find_openstateowner_id(u32 st_id, int flags) {
1996 struct nfs4_stateowner *local = NULL;
1998 dprintk("NFSD: find_openstateowner_id %d\n", st_id);
1999 if (flags & CLOSE_STATE) {
2000 list_for_each_entry(local, &close_lru, so_close_lru) {
2001 if (local->so_id == st_id)
2009 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
2011 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
2015 STALE_STATEID(stateid_t *stateid)
2017 if (stateid->si_boot == boot_time)
2019 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2020 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2021 stateid->si_generation);
2026 access_permit_read(unsigned long access_bmap)
2028 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
2029 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
2030 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
2034 access_permit_write(unsigned long access_bmap)
2036 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
2037 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2041 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2043 int status = nfserr_openmode;
2045 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2047 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2055 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2057 /* Trying to call delegreturn with a special stateid? Yuch: */
2058 if (!(flags & (RD_STATE | WR_STATE)))
2059 return nfserr_bad_stateid;
2060 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2062 else if (nfs4_in_grace()) {
2063 /* Answer in remaining cases depends on existance of
2064 * conflicting state; so we must wait out the grace period. */
2065 return nfserr_grace;
2066 } else if (flags & WR_STATE)
2067 return nfs4_share_conflict(current_fh,
2068 NFS4_SHARE_DENY_WRITE);
2069 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2070 return nfs4_share_conflict(current_fh,
2071 NFS4_SHARE_DENY_READ);
2075 * Allow READ/WRITE during grace period on recovered state only for files
2076 * that are not able to provide mandatory locking.
2079 io_during_grace_disallowed(struct inode *inode, int flags)
2081 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2082 && MANDATORY_LOCK(inode);
2086 * Checks for stateid operations
2089 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2091 struct nfs4_stateid *stp = NULL;
2092 struct nfs4_delegation *dp = NULL;
2094 struct inode *ino = current_fh->fh_dentry->d_inode;
2097 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2098 stateid->si_boot, stateid->si_stateownerid,
2099 stateid->si_fileid, stateid->si_generation);
2103 if (io_during_grace_disallowed(ino, flags))
2104 return nfserr_grace;
2106 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2107 return check_special_stateids(current_fh, stateid, flags);
2110 status = nfserr_stale_stateid;
2111 if (STALE_STATEID(stateid))
2115 status = nfserr_bad_stateid;
2116 if (!stateid->si_fileid) { /* delegation stateid */
2117 if(!(dp = find_delegation_stateid(ino, stateid))) {
2118 dprintk("NFSD: delegation stateid not found\n");
2119 if (nfs4_in_grace())
2120 status = nfserr_grace;
2123 stidp = &dp->dl_stateid;
2124 } else { /* open or lock stateid */
2125 if (!(stp = find_stateid(stateid, flags))) {
2126 dprintk("NFSD: open or lock stateid not found\n");
2127 if (nfs4_in_grace())
2128 status = nfserr_grace;
2131 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2133 if (!stp->st_stateowner->so_confirmed)
2135 stidp = &stp->st_stateid;
2137 if (stateid->si_generation > stidp->si_generation)
2141 status = nfserr_old_stateid;
2142 if (stateid->si_generation < stidp->si_generation)
2145 if ((status = nfs4_check_openmode(stp,flags)))
2147 renew_client(stp->st_stateowner->so_client);
2149 *filpp = stp->st_vfs_file;
2151 if ((status = nfs4_check_delegmode(dp, flags)))
2153 renew_client(dp->dl_client);
2154 if (flags & DELEG_RET)
2155 unhash_delegation(dp);
2157 *filpp = dp->dl_vfs_file;
2166 * Checks for sequence id mutating operations.
2169 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)
2172 struct nfs4_stateid *stp;
2173 struct nfs4_stateowner *sop;
2175 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2176 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2177 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2178 stateid->si_generation);
2183 status = nfserr_bad_stateid;
2184 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2185 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2189 status = nfserr_stale_stateid;
2190 if (STALE_STATEID(stateid))
2193 * We return BAD_STATEID if filehandle doesn't match stateid,
2194 * the confirmed flag is incorrecly set, or the generation
2195 * number is incorrect.
2196 * If there is no entry in the openfile table for this id,
2197 * we can't always return BAD_STATEID;
2198 * this might be a retransmitted CLOSE which has arrived after
2199 * the openfile has been released.
2201 if (!(stp = find_stateid(stateid, flags)))
2202 goto no_nfs4_stateid;
2204 status = nfserr_bad_stateid;
2206 /* for new lock stateowners:
2207 * check that the lock->v.new.open_stateid
2208 * refers to an open stateowner
2210 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2211 * as the open_stateid->st_stateowner->so_client->clientid
2214 struct nfs4_stateowner *sop = stp->st_stateowner;
2215 struct nfs4_client *clp = sop->so_client;
2217 if (!sop->so_is_open_owner)
2219 if (!cmp_clid(&clp->cl_clientid, lockclid))
2223 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2224 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2229 *sopp = sop = stp->st_stateowner;
2232 * We now validate the seqid and stateid generation numbers.
2233 * For the moment, we ignore the possibility of
2234 * generation number wraparound.
2236 if (seqid != sop->so_seqid + 1)
2239 if (sop->so_confirmed) {
2240 if (flags & CONFIRM) {
2241 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2246 if (!(flags & CONFIRM)) {
2247 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2251 if (stateid->si_generation > stp->st_stateid.si_generation) {
2252 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2256 status = nfserr_old_stateid;
2257 if (stateid->si_generation < stp->st_stateid.si_generation) {
2258 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2261 /* XXX renew the client lease here */
2270 * We determine whether this is a bad stateid or a replay,
2271 * starting by trying to look up the stateowner.
2272 * If stateowner is not found - stateid is bad.
2274 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) {
2275 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2276 status = nfserr_bad_stateid;
2282 if (seqid == sop->so_seqid) {
2283 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2284 /* indicate replay to calling function */
2285 status = NFSERR_REPLAY_ME;
2287 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
2290 status = nfserr_bad_seqid;
2296 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
2299 struct nfs4_stateowner *sop;
2300 struct nfs4_stateid *stp;
2302 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2303 (int)current_fh->fh_dentry->d_name.len,
2304 current_fh->fh_dentry->d_name.name);
2306 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2311 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2312 &oc->oc_req_stateid,
2313 CHECK_FH | CONFIRM | OPEN_STATE,
2314 &oc->oc_stateowner, &stp, NULL)))
2317 sop = oc->oc_stateowner;
2318 sop->so_confirmed = 1;
2319 update_stateid(&stp->st_stateid);
2320 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2321 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2322 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2323 stp->st_stateid.si_boot,
2324 stp->st_stateid.si_stateownerid,
2325 stp->st_stateid.si_fileid,
2326 stp->st_stateid.si_generation);
2328 nfsd4_create_clid_dir(sop->so_client);
2330 if (oc->oc_stateowner)
2331 nfs4_get_stateowner(oc->oc_stateowner);
2332 nfs4_unlock_state();
2338 * unset all bits in union bitmap (bmap) that
2339 * do not exist in share (from successful OPEN_DOWNGRADE)
2342 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2345 for (i = 1; i < 4; i++) {
2346 if ((i & access) != i)
2347 __clear_bit(i, bmap);
2352 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2355 for (i = 0; i < 4; i++) {
2356 if ((i & deny) != i)
2357 __clear_bit(i, bmap);
2362 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
2365 struct nfs4_stateid *stp;
2366 unsigned int share_access;
2368 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2369 (int)current_fh->fh_dentry->d_name.len,
2370 current_fh->fh_dentry->d_name.name);
2372 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
2373 return nfserr_inval;
2376 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
2378 CHECK_FH | OPEN_STATE,
2379 &od->od_stateowner, &stp, NULL)))
2382 status = nfserr_inval;
2383 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2384 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2385 stp->st_access_bmap, od->od_share_access);
2388 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2389 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2390 stp->st_deny_bmap, od->od_share_deny);
2393 set_access(&share_access, stp->st_access_bmap);
2394 nfs4_file_downgrade(stp->st_vfs_file,
2395 share_access & ~od->od_share_access);
2397 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2398 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2400 update_stateid(&stp->st_stateid);
2401 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2404 if (od->od_stateowner)
2405 nfs4_get_stateowner(od->od_stateowner);
2406 nfs4_unlock_state();
2411 * nfs4_unlock_state() called after encode
2414 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
2417 struct nfs4_stateid *stp;
2419 dprintk("NFSD: nfsd4_close on file %.*s\n",
2420 (int)current_fh->fh_dentry->d_name.len,
2421 current_fh->fh_dentry->d_name.name);
2424 /* check close_lru for replay */
2425 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2427 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2428 &close->cl_stateowner, &stp, NULL)))
2431 * Return success, but first update the stateid.
2434 update_stateid(&stp->st_stateid);
2435 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2437 /* release_state_owner() calls nfsd_close() if needed */
2438 release_state_owner(stp, OPEN_STATE);
2440 if (close->cl_stateowner)
2441 nfs4_get_stateowner(close->cl_stateowner);
2442 nfs4_unlock_state();
2447 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2451 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2455 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2456 nfs4_unlock_state();
2463 * Lock owner state (byte-range locks)
2465 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2466 #define LOCK_HASH_BITS 8
2467 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2468 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2470 #define lockownerid_hashval(id) \
2471 ((id) & LOCK_HASH_MASK)
2473 static inline unsigned int
2474 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2475 struct xdr_netobj *ownername)
2477 return (file_hashval(inode) + cl_id
2478 + opaque_hashval(ownername->data, ownername->len))
2482 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2483 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2484 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2486 static struct nfs4_stateid *
2487 find_stateid(stateid_t *stid, int flags)
2489 struct nfs4_stateid *local = NULL;
2490 u32 st_id = stid->si_stateownerid;
2491 u32 f_id = stid->si_fileid;
2492 unsigned int hashval;
2494 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2495 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2496 hashval = stateid_hashval(st_id, f_id);
2497 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2498 if ((local->st_stateid.si_stateownerid == st_id) &&
2499 (local->st_stateid.si_fileid == f_id))
2503 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2504 hashval = stateid_hashval(st_id, f_id);
2505 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2506 if ((local->st_stateid.si_stateownerid == st_id) &&
2507 (local->st_stateid.si_fileid == f_id))
2511 printk("NFSD: find_stateid: ERROR: no state flag\n");
2515 static struct nfs4_delegation *
2516 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2518 struct nfs4_file *fp;
2519 struct nfs4_delegation *dl;
2521 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2522 stid->si_boot, stid->si_stateownerid,
2523 stid->si_fileid, stid->si_generation);
2525 fp = find_file(ino);
2528 dl = find_delegation_file(fp, stid);
2534 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2535 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2536 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2537 * locking, this prevents us from being completely protocol-compliant. The
2538 * real solution to this problem is to start using unsigned file offsets in
2539 * the VFS, but this is a very deep change!
2542 nfs4_transform_lock_offset(struct file_lock *lock)
2544 if (lock->fl_start < 0)
2545 lock->fl_start = OFFSET_MAX;
2546 if (lock->fl_end < 0)
2547 lock->fl_end = OFFSET_MAX;
2551 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
2553 struct nfs4_stateowner *local = NULL;
2556 if (hashval >= LOCK_HASH_SIZE)
2558 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) {
2570 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2572 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
2573 unsigned int hval = lockownerid_hashval(sop->so_id);
2575 deny->ld_sop = NULL;
2576 if (nfs4_verify_lock_stateowner(sop, hval)) {
2577 kref_get(&sop->so_ref);
2579 deny->ld_clientid = sop->so_client->cl_clientid;
2581 deny->ld_start = fl->fl_start;
2582 deny->ld_length = ~(u64)0;
2583 if (fl->fl_end != ~(u64)0)
2584 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2585 deny->ld_type = NFS4_READ_LT;
2586 if (fl->fl_type != F_RDLCK)
2587 deny->ld_type = NFS4_WRITE_LT;
2590 static struct nfs4_stateowner *
2591 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2592 struct xdr_netobj *owner)
2594 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2595 struct nfs4_stateowner *op;
2597 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2598 if (cmp_owner_str(op, owner, clid))
2605 * Alloc a lock owner structure.
2606 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2609 * strhashval = lock_ownerstr_hashval
2610 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2613 static struct nfs4_stateowner *
2614 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2615 struct nfs4_stateowner *sop;
2616 struct nfs4_replay *rp;
2617 unsigned int idhashval;
2619 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2621 idhashval = lockownerid_hashval(current_ownerid);
2622 INIT_LIST_HEAD(&sop->so_idhash);
2623 INIT_LIST_HEAD(&sop->so_strhash);
2624 INIT_LIST_HEAD(&sop->so_perclient);
2625 INIT_LIST_HEAD(&sop->so_stateids);
2626 INIT_LIST_HEAD(&sop->so_perstateid);
2627 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2629 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2630 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2631 list_add(&sop->so_perstateid, &open_stp->st_lockowners);
2632 sop->so_is_open_owner = 0;
2633 sop->so_id = current_ownerid++;
2634 sop->so_client = clp;
2635 sop->so_seqid = lock->lk_new_lock_seqid - 1;
2636 sop->so_confirmed = 1;
2637 rp = &sop->so_replay;
2638 rp->rp_status = NFSERR_SERVERFAULT;
2640 rp->rp_buf = rp->rp_ibuf;
2644 static struct nfs4_stateid *
2645 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2647 struct nfs4_stateid *stp;
2648 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2650 stp = nfs4_alloc_stateid();
2653 INIT_LIST_HEAD(&stp->st_hash);
2654 INIT_LIST_HEAD(&stp->st_perfile);
2655 INIT_LIST_HEAD(&stp->st_perstateowner);
2656 INIT_LIST_HEAD(&stp->st_lockowners); /* not used */
2657 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2658 list_add(&stp->st_perfile, &fp->fi_stateids);
2659 list_add(&stp->st_perstateowner, &sop->so_stateids);
2660 stp->st_stateowner = sop;
2663 stp->st_stateid.si_boot = boot_time;
2664 stp->st_stateid.si_stateownerid = sop->so_id;
2665 stp->st_stateid.si_fileid = fp->fi_id;
2666 stp->st_stateid.si_generation = 0;
2667 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2668 stp->st_access_bmap = open_stp->st_access_bmap;
2669 stp->st_deny_bmap = open_stp->st_deny_bmap;
2676 check_lock_length(u64 offset, u64 length)
2678 return ((length == 0) || ((length != ~(u64)0) &&
2679 LOFF_OVERFLOW(offset, length)));
2686 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
2688 struct nfs4_stateowner *open_sop = NULL;
2689 struct nfs4_stateid *lock_stp;
2691 struct file_lock file_lock;
2692 struct file_lock *conflock;
2694 unsigned int strhashval;
2696 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2697 (long long) lock->lk_offset,
2698 (long long) lock->lk_length);
2700 if (nfs4_in_grace() && !lock->lk_reclaim)
2701 return nfserr_grace;
2702 if (!nfs4_in_grace() && lock->lk_reclaim)
2703 return nfserr_no_grace;
2705 if (check_lock_length(lock->lk_offset, lock->lk_length))
2706 return nfserr_inval;
2710 if (lock->lk_is_new) {
2712 * Client indicates that this is a new lockowner.
2713 * Use open owner and open stateid to create lock owner and lock
2716 struct nfs4_stateid *open_stp = NULL;
2717 struct nfs4_file *fp;
2719 status = nfserr_stale_clientid;
2720 if (STALE_CLIENTID(&lock->lk_new_clientid)) {
2721 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2725 /* is the new lock seqid presented by the client zero? */
2726 status = nfserr_bad_seqid;
2727 if (lock->v.new.lock_seqid != 0)
2730 /* validate and update open stateid and open seqid */
2731 status = nfs4_preprocess_seqid_op(current_fh,
2732 lock->lk_new_open_seqid,
2733 &lock->lk_new_open_stateid,
2734 CHECK_FH | OPEN_STATE,
2735 &open_sop, &open_stp,
2736 &lock->v.new.clientid);
2738 if (lock->lk_reclaim)
2739 status = nfserr_reclaim_bad;
2742 /* create lockowner and lock stateid */
2743 fp = open_stp->st_file;
2744 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2745 open_sop->so_client->cl_clientid.cl_id,
2746 &lock->v.new.owner);
2747 /* XXX: Do we need to check for duplicate stateowners on
2748 * the same file, or should they just be allowed (and
2749 * create new stateids)? */
2750 status = nfserr_resource;
2751 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
2753 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
2754 fp, open_stp)) == NULL) {
2755 release_stateowner(lock->lk_stateowner);
2756 lock->lk_stateowner = NULL;
2759 /* bump the open seqid used to create the lock */
2760 open_sop->so_seqid++;
2762 /* lock (lock owner + lock stateid) already exists */
2763 status = nfs4_preprocess_seqid_op(current_fh,
2764 lock->lk_old_lock_seqid,
2765 &lock->lk_old_lock_stateid,
2766 CHECK_FH | LOCK_STATE,
2767 &lock->lk_stateowner, &lock_stp, NULL);
2771 /* lock->lk_stateowner and lock_stp have been created or found */
2772 filp = lock_stp->st_vfs_file;
2774 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2775 printk("NFSD: nfsd4_lock: permission denied!\n");
2779 locks_init_lock(&file_lock);
2780 switch (lock->lk_type) {
2783 file_lock.fl_type = F_RDLCK;
2786 case NFS4_WRITEW_LT:
2787 file_lock.fl_type = F_WRLCK;
2790 status = nfserr_inval;
2793 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
2794 file_lock.fl_pid = current->tgid;
2795 file_lock.fl_file = filp;
2796 file_lock.fl_flags = FL_POSIX;
2798 file_lock.fl_start = lock->lk_offset;
2799 if ((lock->lk_length == ~(u64)0) ||
2800 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2801 file_lock.fl_end = ~(u64)0;
2803 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2804 nfs4_transform_lock_offset(&file_lock);
2807 * Try to lock the file in the VFS.
2808 * Note: locks.c uses the BKL to protect the inode's lock list.
2811 status = posix_lock_file(filp, &file_lock);
2812 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2813 file_lock.fl_ops->fl_release_private(&file_lock);
2814 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status);
2816 case 0: /* success! */
2817 update_stateid(&lock_stp->st_stateid);
2818 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2822 goto conflicting_lock;
2824 status = nfserr_deadlock;
2826 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
2827 goto out_destroy_new_stateid;
2831 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2832 status = nfserr_denied;
2833 /* XXX There is a race here. Future patch needed to provide
2834 * an atomic posix_lock_and_test_file
2836 if (!(conflock = posix_test_lock(filp, &file_lock))) {
2837 status = nfserr_serverfault;
2840 nfs4_set_lock_denied(conflock, &lock->lk_denied);
2842 out_destroy_new_stateid:
2843 if (lock->lk_is_new) {
2844 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2846 * An error encountered after instantiation of the new
2847 * stateid has forced us to destroy it.
2849 if (!seqid_mutating_err(status))
2850 open_sop->so_seqid--;
2852 release_state_owner(lock_stp, LOCK_STATE);
2855 if (lock->lk_stateowner)
2856 nfs4_get_stateowner(lock->lk_stateowner);
2857 nfs4_unlock_state();
2865 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2867 struct inode *inode;
2869 struct file_lock file_lock;
2870 struct file_lock *conflicting_lock;
2873 if (nfs4_in_grace())
2874 return nfserr_grace;
2876 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2877 return nfserr_inval;
2879 lockt->lt_stateowner = NULL;
2882 status = nfserr_stale_clientid;
2883 if (STALE_CLIENTID(&lockt->lt_clientid)) {
2884 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2888 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2889 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2890 if (status == nfserr_symlink)
2891 status = nfserr_inval;
2895 inode = current_fh->fh_dentry->d_inode;
2896 locks_init_lock(&file_lock);
2897 switch (lockt->lt_type) {
2900 file_lock.fl_type = F_RDLCK;
2903 case NFS4_WRITEW_LT:
2904 file_lock.fl_type = F_WRLCK;
2907 printk("NFSD: nfs4_lockt: bad lock type!\n");
2908 status = nfserr_inval;
2912 lockt->lt_stateowner = find_lockstateowner_str(inode,
2913 &lockt->lt_clientid, &lockt->lt_owner);
2914 if (lockt->lt_stateowner)
2915 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2916 file_lock.fl_pid = current->tgid;
2917 file_lock.fl_flags = FL_POSIX;
2919 file_lock.fl_start = lockt->lt_offset;
2920 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2921 file_lock.fl_end = ~(u64)0;
2923 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2925 nfs4_transform_lock_offset(&file_lock);
2927 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2928 * since LOCKT doesn't require an OPEN, and therefore a struct
2929 * file may not exist, pass posix_test_lock a struct file with
2930 * only the dentry:inode set.
2932 memset(&file, 0, sizeof (struct file));
2933 file.f_dentry = current_fh->fh_dentry;
2936 conflicting_lock = posix_test_lock(&file, &file_lock);
2937 if (conflicting_lock) {
2938 status = nfserr_denied;
2939 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
2942 nfs4_unlock_state();
2947 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
2949 struct nfs4_stateid *stp;
2950 struct file *filp = NULL;
2951 struct file_lock file_lock;
2954 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2955 (long long) locku->lu_offset,
2956 (long long) locku->lu_length);
2958 if (check_lock_length(locku->lu_offset, locku->lu_length))
2959 return nfserr_inval;
2963 if ((status = nfs4_preprocess_seqid_op(current_fh,
2966 CHECK_FH | LOCK_STATE,
2967 &locku->lu_stateowner, &stp, NULL)))
2970 filp = stp->st_vfs_file;
2972 locks_init_lock(&file_lock);
2973 file_lock.fl_type = F_UNLCK;
2974 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2975 file_lock.fl_pid = current->tgid;
2976 file_lock.fl_file = filp;
2977 file_lock.fl_flags = FL_POSIX;
2978 file_lock.fl_start = locku->lu_offset;
2980 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2981 file_lock.fl_end = ~(u64)0;
2983 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2984 nfs4_transform_lock_offset(&file_lock);
2987 * Try to unlock the file in the VFS.
2989 status = posix_lock_file(filp, &file_lock);
2990 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2991 file_lock.fl_ops->fl_release_private(&file_lock);
2993 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2997 * OK, unlock succeeded; the only thing left to do is update the stateid.
2999 update_stateid(&stp->st_stateid);
3000 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
3003 if (locku->lu_stateowner)
3004 nfs4_get_stateowner(locku->lu_stateowner);
3005 nfs4_unlock_state();
3009 status = nfserrno(status);
3015 * 1: locks held by lockowner
3016 * 0: no locks held by lockowner
3019 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
3021 struct file_lock **flpp;
3022 struct inode *inode = filp->f_dentry->d_inode;
3026 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
3027 if ((*flpp)->fl_owner == (fl_owner_t)lowner)
3037 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
3039 clientid_t *clid = &rlockowner->rl_clientid;
3040 struct nfs4_stateowner *sop;
3041 struct nfs4_stateid *stp;
3042 struct xdr_netobj *owner = &rlockowner->rl_owner;
3043 struct list_head matches;
3047 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3048 clid->cl_boot, clid->cl_id);
3050 /* XXX check for lease expiration */
3052 status = nfserr_stale_clientid;
3053 if (STALE_CLIENTID(clid)) {
3054 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3060 status = nfserr_locks_held;
3061 /* XXX: we're doing a linear search through all the lockowners.
3062 * Yipes! For now we'll just hope clients aren't really using
3063 * release_lockowner much, but eventually we have to fix these
3064 * data structures. */
3065 INIT_LIST_HEAD(&matches);
3066 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3067 list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) {
3068 if (!cmp_owner_str(sop, owner, clid))
3070 list_for_each_entry(stp, &sop->so_stateids,
3072 if (check_for_locks(stp->st_vfs_file, sop))
3074 /* Note: so_perclient unused for lockowners,
3075 * so it's OK to fool with here. */
3076 list_add(&sop->so_perclient, &matches);
3080 /* Clients probably won't expect us to return with some (but not all)
3081 * of the lockowner state released; so don't release any until all
3082 * have been checked. */
3084 list_for_each_entry(sop, &matches, so_perclient) {
3085 release_stateowner(sop);
3088 nfs4_unlock_state();
3092 static inline struct nfs4_client_reclaim *
3095 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3099 nfs4_has_reclaimed_state(const char *name)
3101 unsigned int strhashval = clientstr_hashval(name);
3102 struct nfs4_client *clp;
3104 clp = find_confirmed_client_by_str(name, strhashval);
3109 * failure => all reset bets are off, nfserr_no_grace...
3112 nfs4_client_to_reclaim(const char *name)
3114 unsigned int strhashval;
3115 struct nfs4_client_reclaim *crp = NULL;
3117 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3118 crp = alloc_reclaim();
3121 strhashval = clientstr_hashval(name);
3122 INIT_LIST_HEAD(&crp->cr_strhash);
3123 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3124 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
3125 reclaim_str_hashtbl_size++;
3130 nfs4_release_reclaim(void)
3132 struct nfs4_client_reclaim *crp = NULL;
3135 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3136 while (!list_empty(&reclaim_str_hashtbl[i])) {
3137 crp = list_entry(reclaim_str_hashtbl[i].next,
3138 struct nfs4_client_reclaim, cr_strhash);
3139 list_del(&crp->cr_strhash);
3141 reclaim_str_hashtbl_size--;
3144 BUG_ON(reclaim_str_hashtbl_size);
3148 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3149 static struct nfs4_client_reclaim *
3150 nfs4_find_reclaim_client(clientid_t *clid)
3152 unsigned int strhashval;
3153 struct nfs4_client *clp;
3154 struct nfs4_client_reclaim *crp = NULL;
3157 /* find clientid in conf_id_hashtbl */
3158 clp = find_confirmed_client(clid);
3162 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3163 clp->cl_name.len, clp->cl_name.data,
3166 /* find clp->cl_name in reclaim_str_hashtbl */
3167 strhashval = clientstr_hashval(clp->cl_recdir);
3168 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3169 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
3177 * Called from OPEN. Look for clientid in reclaim list.
3180 nfs4_check_open_reclaim(clientid_t *clid)
3182 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3185 /* initialization to perform at module load time: */
3188 nfs4_state_init(void)
3192 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3193 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3194 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3195 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3196 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3198 for (i = 0; i < FILE_HASH_SIZE; i++) {
3199 INIT_LIST_HEAD(&file_hashtbl[i]);
3201 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3202 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3203 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3205 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3206 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3207 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3209 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3210 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3211 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3213 memset(&onestateid, ~0, sizeof(stateid_t));
3214 INIT_LIST_HEAD(&close_lru);
3215 INIT_LIST_HEAD(&client_lru);
3216 INIT_LIST_HEAD(&del_recall_lru);
3217 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3218 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3219 reclaim_str_hashtbl_size = 0;
3223 nfsd4_load_reboot_recovery_data(void)
3227 nfsd4_init_recdir(recovery_dirname);
3228 status = nfsd4_recdir_load();
3230 printk("NFSD: Failure reading reboot recovery data\n");
3233 /* initialization to perform when the nfsd service is started: */
3236 __nfs4_state_start(void)
3240 boot_time = get_seconds();
3241 grace_time = max(user_lease_time, lease_time);
3242 lease_time = user_lease_time;
3244 printk("NFSD: starting %ld-second grace period\n", grace_time);
3245 laundry_wq = create_singlethread_workqueue("nfsd4");
3246 queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
3250 nfs4_state_start(void)
3256 status = nfsd4_init_slabs();
3259 nfsd4_load_reboot_recovery_data();
3260 __nfs4_state_start();
3272 nfs4_lease_time(void)
3278 __nfs4_state_shutdown(void)
3281 struct nfs4_client *clp = NULL;
3282 struct nfs4_delegation *dp = NULL;
3283 struct nfs4_stateowner *sop = NULL;
3284 struct list_head *pos, *next, reaplist;
3286 list_for_each_safe(pos, next, &close_lru) {
3287 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
3288 list_del(&sop->so_close_lru);
3289 nfs4_put_stateowner(sop);
3292 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3293 while (!list_empty(&conf_id_hashtbl[i])) {
3294 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3297 while (!list_empty(&unconf_str_hashtbl[i])) {
3298 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3302 INIT_LIST_HEAD(&reaplist);
3303 spin_lock(&recall_lock);
3304 list_for_each_safe(pos, next, &del_recall_lru) {
3305 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3306 list_move(&dp->dl_recall_lru, &reaplist);
3308 spin_unlock(&recall_lock);
3309 list_for_each_safe(pos, next, &reaplist) {
3310 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3311 list_del_init(&dp->dl_recall_lru);
3312 unhash_delegation(dp);
3315 cancel_delayed_work(&laundromat_work);
3316 flush_workqueue(laundry_wq);
3317 destroy_workqueue(laundry_wq);
3318 nfsd4_shutdown_recdir();
3323 nfs4_state_shutdown(void)
3326 nfs4_release_reclaim();
3327 __nfs4_state_shutdown();
3329 nfs4_unlock_state();
3333 * Called when leasetime is changed.
3335 * The only way the protocol gives us to handle on-the-fly lease changes is to
3336 * simulate a reboot. Instead of doing that, we just wait till the next time
3337 * we start to register any changes in lease time. If the administrator
3338 * really wants to change the lease time *now*, they can go ahead and bring
3339 * nfsd down and then back up again after changing the lease time.
3342 nfs4_reset_lease(time_t leasetime)
3345 user_lease_time = leasetime;