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 */
69 u32 list_add_perfile = 0;
70 u32 list_del_perfile = 0;
71 u32 add_perclient = 0;
72 u32 del_perclient = 0;
77 u32 alloc_delegation= 0;
78 u32 free_delegation= 0;
80 /* forward declarations */
81 struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
82 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
83 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
88 * protects clientid_hashtbl[], clientstr_hashtbl[],
89 * unconfstr_hashtbl[], uncofid_hashtbl[].
91 static DECLARE_MUTEX(client_sema);
100 nfs4_unlock_state(void)
106 opaque_hashval(const void *ptr, int nbytes)
108 unsigned char *cptr = (unsigned char *) ptr;
118 /* forward declarations */
119 static void release_stateowner(struct nfs4_stateowner *sop);
120 static void release_stateid(struct nfs4_stateid *stp, int flags);
121 static void release_file(struct nfs4_file *fp);
127 /* recall_lock protects the del_recall_lru */
128 spinlock_t recall_lock;
129 static struct list_head del_recall_lru;
131 static struct nfs4_delegation *
132 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
134 struct nfs4_delegation *dp;
135 struct nfs4_file *fp = stp->st_file;
136 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
138 dprintk("NFSD alloc_init_deleg\n");
139 if ((dp = kmalloc(sizeof(struct nfs4_delegation),
140 GFP_KERNEL)) == NULL)
142 INIT_LIST_HEAD(&dp->dl_del_perfile);
143 INIT_LIST_HEAD(&dp->dl_del_perclnt);
144 INIT_LIST_HEAD(&dp->dl_recall_lru);
148 get_file(stp->st_vfs_file);
149 dp->dl_vfs_file = stp->st_vfs_file;
151 dp->dl_recall.cbr_dp = NULL;
152 dp->dl_recall.cbr_ident = cb->cb_ident;
153 dp->dl_recall.cbr_trunc = 0;
154 dp->dl_stateid.si_boot = boot_time;
155 dp->dl_stateid.si_stateownerid = current_delegid++;
156 dp->dl_stateid.si_fileid = 0;
157 dp->dl_stateid.si_generation = 0;
158 dp->dl_fhlen = current_fh->fh_handle.fh_size;
159 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
160 current_fh->fh_handle.fh_size);
162 atomic_set(&dp->dl_count, 1);
163 list_add(&dp->dl_del_perfile, &fp->fi_del_perfile);
164 list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
170 nfs4_put_delegation(struct nfs4_delegation *dp)
172 if (atomic_dec_and_test(&dp->dl_count)) {
173 dprintk("NFSD: freeing dp %p\n",dp);
179 /* Remove the associated file_lock first, then remove the delegation.
180 * lease_modify() is called to remove the FS_LEASE file_lock from
181 * the i_flock list, eventually calling nfsd's lock_manager
182 * fl_release_callback.
185 nfs4_close_delegation(struct nfs4_delegation *dp)
187 struct file *filp = dp->dl_vfs_file;
189 dprintk("NFSD: close_delegation dp %p\n",dp);
190 dp->dl_vfs_file = NULL;
191 /* The following nfsd_close may not actually close the file,
192 * but we want to remove the lease in any case. */
193 setlease(filp, F_UNLCK, &dp->dl_flock);
198 /* Called under the state lock. */
200 unhash_delegation(struct nfs4_delegation *dp)
202 list_del_init(&dp->dl_del_perfile);
203 list_del_init(&dp->dl_del_perclnt);
204 spin_lock(&recall_lock);
205 list_del_init(&dp->dl_recall_lru);
206 spin_unlock(&recall_lock);
207 nfs4_close_delegation(dp);
208 nfs4_put_delegation(dp);
215 /* Hash tables for nfs4_clientid state */
216 #define CLIENT_HASH_BITS 4
217 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
218 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
220 #define clientid_hashval(id) \
221 ((id) & CLIENT_HASH_MASK)
222 #define clientstr_hashval(name, namelen) \
223 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
225 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
226 * used in reboot/reset lease grace period processing
228 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
229 * setclientid_confirmed info.
231 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
234 * client_lru holds client queue ordered by nfs4_client.cl_time
237 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
238 * for last close replay.
240 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
241 static int reclaim_str_hashtbl_size = 0;
242 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
243 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
244 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
245 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
246 static struct list_head client_lru;
247 static struct list_head close_lru;
250 renew_client(struct nfs4_client *clp)
253 * Move client to the end to the LRU list.
255 dprintk("renewing client (clientid %08x/%08x)\n",
256 clp->cl_clientid.cl_boot,
257 clp->cl_clientid.cl_id);
258 list_move_tail(&clp->cl_lru, &client_lru);
259 clp->cl_time = get_seconds();
262 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
264 STALE_CLIENTID(clientid_t *clid)
266 if (clid->cl_boot == boot_time)
268 dprintk("NFSD stale clientid (%08x/%08x)\n",
269 clid->cl_boot, clid->cl_id);
274 * XXX Should we use a slab cache ?
275 * This type of memory management is somewhat inefficient, but we use it
276 * anyway since SETCLIENTID is not a common operation.
278 static inline struct nfs4_client *
279 alloc_client(struct xdr_netobj name)
281 struct nfs4_client *clp;
283 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
284 memset(clp, 0, sizeof(*clp));
285 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
286 memcpy(clp->cl_name.data, name.data, name.len);
287 clp->cl_name.len = name.len;
298 free_client(struct nfs4_client *clp)
300 if (clp->cl_cred.cr_group_info)
301 put_group_info(clp->cl_cred.cr_group_info);
302 kfree(clp->cl_name.data);
307 put_nfs4_client(struct nfs4_client *clp)
309 if (atomic_dec_and_test(&clp->cl_count))
314 expire_client(struct nfs4_client *clp)
316 struct nfs4_stateowner *sop;
317 struct nfs4_delegation *dp;
318 struct nfs4_callback *cb = &clp->cl_callback;
319 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
320 struct list_head reaplist;
322 dprintk("NFSD: expire_client cl_count %d\n",
323 atomic_read(&clp->cl_count));
325 /* shutdown rpc client, ending any outstanding recall rpcs */
326 if (atomic_read(&cb->cb_set) == 1 && clnt) {
327 rpc_shutdown_client(clnt);
328 clnt = clp->cl_callback.cb_client = NULL;
331 INIT_LIST_HEAD(&reaplist);
332 spin_lock(&recall_lock);
333 while (!list_empty(&clp->cl_del_perclnt)) {
334 dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt);
335 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
337 list_del_init(&dp->dl_del_perclnt);
338 list_move(&dp->dl_recall_lru, &reaplist);
340 spin_unlock(&recall_lock);
341 while (!list_empty(&reaplist)) {
342 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
343 list_del_init(&dp->dl_recall_lru);
344 unhash_delegation(dp);
346 list_del(&clp->cl_idhash);
347 list_del(&clp->cl_strhash);
348 list_del(&clp->cl_lru);
349 while (!list_empty(&clp->cl_perclient)) {
350 sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
351 release_stateowner(sop);
353 put_nfs4_client(clp);
356 static struct nfs4_client *
357 create_client(struct xdr_netobj name) {
358 struct nfs4_client *clp;
360 if (!(clp = alloc_client(name)))
362 atomic_set(&clp->cl_count, 1);
363 atomic_set(&clp->cl_callback.cb_set, 0);
364 clp->cl_callback.cb_parsed = 0;
365 INIT_LIST_HEAD(&clp->cl_idhash);
366 INIT_LIST_HEAD(&clp->cl_strhash);
367 INIT_LIST_HEAD(&clp->cl_perclient);
368 INIT_LIST_HEAD(&clp->cl_del_perclnt);
369 INIT_LIST_HEAD(&clp->cl_lru);
375 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
376 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
380 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
381 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
382 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
386 copy_cred(struct svc_cred *target, struct svc_cred *source) {
388 target->cr_uid = source->cr_uid;
389 target->cr_gid = source->cr_gid;
390 target->cr_group_info = source->cr_group_info;
391 get_group_info(target->cr_group_info);
395 cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) {
398 return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len));
402 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
403 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
407 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
408 return((cl1->cl_boot == cl2->cl_boot) &&
409 (cl1->cl_id == cl2->cl_id));
412 /* XXX what about NGROUP */
414 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
415 return(cr1->cr_uid == cr2->cr_uid);
420 gen_clid(struct nfs4_client *clp) {
421 clp->cl_clientid.cl_boot = boot_time;
422 clp->cl_clientid.cl_id = current_clientid++;
426 gen_confirm(struct nfs4_client *clp) {
431 p = (u32 *)clp->cl_confirm.data;
437 check_name(struct xdr_netobj name) {
441 if (name.len > NFS4_OPAQUE_LIMIT) {
442 printk("NFSD: check_name: name too long(%d)!\n", name.len);
449 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
451 unsigned int idhashval;
453 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
454 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
455 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
456 list_add_tail(&clp->cl_lru, &client_lru);
457 clp->cl_time = get_seconds();
461 move_to_confirmed(struct nfs4_client *clp)
463 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
464 unsigned int strhashval;
466 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
467 list_del_init(&clp->cl_strhash);
468 list_del_init(&clp->cl_idhash);
469 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
470 strhashval = clientstr_hashval(clp->cl_name.data,
472 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
476 static struct nfs4_client *
477 find_confirmed_client(clientid_t *clid)
479 struct nfs4_client *clp;
480 unsigned int idhashval = clientid_hashval(clid->cl_id);
482 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
483 if (cmp_clid(&clp->cl_clientid, clid))
489 static struct nfs4_client *
490 find_unconfirmed_client(clientid_t *clid)
492 struct nfs4_client *clp;
493 unsigned int idhashval = clientid_hashval(clid->cl_id);
495 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
496 if (cmp_clid(&clp->cl_clientid, clid))
502 /* a helper function for parse_callback */
504 parse_octet(unsigned int *lenp, char **addrp)
506 unsigned int len = *lenp;
518 if ((c < '0') || (c > '9')) {
524 n = (n * 10) + (c - '0');
535 /* parse and set the setclientid ipv4 callback address */
537 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
542 u32 addrlen = addr_len;
543 char *addr = addr_val;
548 for(i = 4; i > 0 ; i--) {
549 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
552 cbaddr |= (temp << shift);
560 for(i = 2; i > 0 ; i--) {
561 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
564 cbport |= (temp << shift);
573 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
575 struct nfs4_callback *cb = &clp->cl_callback;
577 /* Currently, we only support tcp for the callback channel */
578 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
581 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
582 &cb->cb_addr, &cb->cb_port)))
584 cb->cb_prog = se->se_callback_prog;
585 cb->cb_ident = se->se_callback_ident;
589 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
590 "will not receive delegations\n",
591 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
598 * RFC 3010 has a complex implmentation description of processing a
599 * SETCLIENTID request consisting of 5 bullets, labeled as
600 * CASE0 - CASE4 below.
603 * callback information will be processed in a future patch
605 * an unconfirmed record is added when:
606 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
607 * CASE 1: confirmed record found with matching name, principal,
608 * verifier, and clientid.
609 * CASE 2: confirmed record found with matching name, principal,
610 * and there is no unconfirmed record with matching
613 * an unconfirmed record is replaced when:
614 * CASE 3: confirmed record found with matching name, principal,
615 * and an unconfirmed record is found with matching
616 * name, principal, and with clientid and
617 * confirm that does not match the confirmed record.
618 * CASE 4: there is no confirmed record with matching name and
619 * principal. there is an unconfirmed record with
620 * matching name, principal.
622 * an unconfirmed record is deleted when:
623 * CASE 1: an unconfirmed record that matches input name, verifier,
624 * and confirmed clientid.
625 * CASE 4: any unconfirmed records with matching name and principal
626 * that exist after an unconfirmed record has been replaced
627 * as described above.
631 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
633 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
634 struct xdr_netobj clname = {
635 .len = setclid->se_namelen,
636 .data = setclid->se_name,
638 nfs4_verifier clverifier = setclid->se_verf;
639 unsigned int strhashval;
640 struct nfs4_client * conf, * unconf, * new, * clp;
643 status = nfserr_inval;
644 if (!check_name(clname))
648 * XXX The Duplicate Request Cache (DRC) has been checked (??)
649 * We get here on a DRC miss.
652 strhashval = clientstr_hashval(clname.data, clname.len);
656 list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) {
657 if (!cmp_name(&clp->cl_name, &clname))
661 * clname match, confirmed, different principal
662 * or different ip_address
664 status = nfserr_clid_inuse;
665 if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) {
666 printk("NFSD: setclientid: string in use by client"
667 "(clientid %08x/%08x)\n",
668 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
671 if (clp->cl_addr != ip_addr) {
672 printk("NFSD: setclientid: string in use by client"
673 "(clientid %08x/%08x)\n",
674 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
679 * cl_name match from a previous SETCLIENTID operation
680 * XXX check for additional matches?
686 list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) {
687 if (!cmp_name(&clp->cl_name, &clname))
689 /* cl_name match from a previous SETCLIENTID operation */
693 status = nfserr_resource;
697 * placed first, because it is the normal case.
700 expire_client(unconf);
701 if (!(new = create_client(clname)))
703 copy_verf(new, &clverifier);
704 new->cl_addr = ip_addr;
705 copy_cred(&new->cl_cred,&rqstp->rq_cred);
708 gen_callback(new, setclid);
709 add_to_unconfirmed(new, strhashval);
710 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
713 * cl_name match, confirmed, principal match
714 * verifier match: probable callback update
716 * remove any unconfirmed nfs4_client with
717 * matching cl_name, cl_verifier, and cl_clientid
719 * create and insert an unconfirmed nfs4_client with same
720 * cl_name, cl_verifier, and cl_clientid as existing
721 * nfs4_client, but with the new callback info and a
725 cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) &&
726 cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) {
727 expire_client(unconf);
729 if (!(new = create_client(clname)))
731 copy_verf(new,&conf->cl_verifier);
732 new->cl_addr = ip_addr;
733 copy_cred(&new->cl_cred,&rqstp->rq_cred);
734 copy_clid(new, conf);
736 gen_callback(new, setclid);
737 add_to_unconfirmed(new,strhashval);
738 } else if (!unconf) {
741 * clname match, confirmed, principal match
742 * verfier does not match
743 * no unconfirmed. create a new unconfirmed nfs4_client
744 * using input clverifier, clname, and callback info
745 * and generate a new cl_clientid and cl_confirm.
747 if (!(new = create_client(clname)))
749 copy_verf(new,&clverifier);
750 new->cl_addr = ip_addr;
751 copy_cred(&new->cl_cred,&rqstp->rq_cred);
754 gen_callback(new, setclid);
755 add_to_unconfirmed(new, strhashval);
756 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
759 * confirmed found (name, principal match)
760 * confirmed verifier does not match input clverifier
762 * unconfirmed found (name match)
763 * confirmed->cl_confirm != unconfirmed->cl_confirm
765 * remove unconfirmed.
767 * create an unconfirmed nfs4_client
768 * with same cl_name as existing confirmed nfs4_client,
769 * but with new callback info, new cl_clientid,
770 * new cl_verifier and a new cl_confirm
772 expire_client(unconf);
773 if (!(new = create_client(clname)))
775 copy_verf(new,&clverifier);
776 new->cl_addr = ip_addr;
777 copy_cred(&new->cl_cred,&rqstp->rq_cred);
780 gen_callback(new, setclid);
781 add_to_unconfirmed(new, strhashval);
783 /* No cases hit !!! */
784 status = nfserr_inval;
788 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
789 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
790 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
799 * RFC 3010 has a complex implmentation description of processing a
800 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
801 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
803 * NOTE: callback information will be processed here in a future patch
806 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
808 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
809 struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
810 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
811 clientid_t * clid = &setclientid_confirm->sc_clientid;
814 if (STALE_CLIENTID(clid))
815 return nfserr_stale_clientid;
817 * XXX The Duplicate Request Cache (DRC) has been checked (??)
818 * We get here on a DRC miss.
822 clp = find_confirmed_client(clid);
824 status = nfserr_inval;
826 * Found a record for this clientid. If the IP addresses
827 * don't match, return ERR_INVAL just as if the record had
830 if (clp->cl_addr != ip_addr) {
831 printk("NFSD: setclientid: string in use by client"
832 "(clientid %08x/%08x)\n",
833 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
838 clp = find_unconfirmed_client(clid);
840 status = nfserr_inval;
841 if (clp->cl_addr != ip_addr) {
842 printk("NFSD: setclientid: string in use by client"
843 "(clientid %08x/%08x)\n",
844 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
850 * unconf record that matches input clientid and input confirm.
851 * conf record that matches input clientid.
852 * conf and unconf records match names, verifiers
854 if ((conf && unconf) &&
855 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
856 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
857 (cmp_name(&conf->cl_name,&unconf->cl_name)) &&
858 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
859 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
860 status = nfserr_clid_inuse;
864 move_to_confirmed(unconf);
870 * conf record that matches input clientid.
871 * if unconf record that matches input clientid, then unconf->cl_name
872 * or unconf->cl_verifier don't match the conf record.
874 if ((conf && !unconf) ||
876 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
877 !cmp_name(&conf->cl_name, &unconf->cl_name)))) {
878 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
879 status = nfserr_clid_inuse;
887 * conf record not found.
888 * unconf record found.
889 * unconf->cl_confirm matches input confirm
891 if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) {
892 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
893 status = nfserr_clid_inuse;
897 move_to_confirmed(unconf);
902 * conf record not found, or if conf, then conf->cl_confirm does not
903 * match input confirm.
904 * unconf record not found, or if unconf, then unconf->cl_confirm
905 * does not match input confirm.
907 if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) &&
908 (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) {
909 status = nfserr_stale_clientid;
912 /* check that we have hit one of the cases...*/
913 status = nfserr_inval;
917 nfsd4_probe_callback(clp);
923 * Open owner state (share locks)
926 /* hash tables for nfs4_stateowner */
927 #define OWNER_HASH_BITS 8
928 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
929 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
931 #define ownerid_hashval(id) \
932 ((id) & OWNER_HASH_MASK)
933 #define ownerstr_hashval(clientid, ownername) \
934 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
936 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
937 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
939 /* hash table for nfs4_file */
940 #define FILE_HASH_BITS 8
941 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
942 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
943 /* hash table for (open)nfs4_stateid */
944 #define STATEID_HASH_BITS 10
945 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
946 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
948 #define file_hashval(x) \
949 hash_ptr(x, FILE_HASH_BITS)
950 #define stateid_hashval(owner_id, file_id) \
951 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
953 static struct list_head file_hashtbl[FILE_HASH_SIZE];
954 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
956 /* OPEN Share state helper functions */
957 static inline struct nfs4_file *
958 alloc_init_file(struct inode *ino)
960 struct nfs4_file *fp;
961 unsigned int hashval = file_hashval(ino);
963 if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) {
964 INIT_LIST_HEAD(&fp->fi_hash);
965 INIT_LIST_HEAD(&fp->fi_perfile);
966 INIT_LIST_HEAD(&fp->fi_del_perfile);
967 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
968 fp->fi_inode = igrab(ino);
969 fp->fi_id = current_fileid++;
977 release_all_files(void)
980 struct nfs4_file *fp;
982 for (i=0;i<FILE_HASH_SIZE;i++) {
983 while (!list_empty(&file_hashtbl[i])) {
984 fp = list_entry(file_hashtbl[i].next, struct nfs4_file, fi_hash);
985 /* this should never be more than once... */
986 if (!list_empty(&fp->fi_perfile) || !list_empty(&fp->fi_del_perfile)) {
987 printk("ERROR: release_all_files: file %p is open, creating dangling state !!!\n",fp);
994 kmem_cache_t *stateowner_slab = NULL;
997 nfsd4_init_slabs(void)
999 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1000 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1001 if (stateowner_slab == NULL) {
1002 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1009 nfsd4_free_slabs(void)
1013 if (stateowner_slab)
1014 status = kmem_cache_destroy(stateowner_slab);
1015 stateowner_slab = NULL;
1020 nfs4_free_stateowner(struct kref *kref)
1022 struct nfs4_stateowner *sop =
1023 container_of(kref, struct nfs4_stateowner, so_ref);
1024 kfree(sop->so_owner.data);
1025 kmem_cache_free(stateowner_slab, sop);
1028 static inline struct nfs4_stateowner *
1029 alloc_stateowner(struct xdr_netobj *owner)
1031 struct nfs4_stateowner *sop;
1033 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1034 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1035 memcpy(sop->so_owner.data, owner->data, owner->len);
1036 sop->so_owner.len = owner->len;
1037 kref_init(&sop->so_ref);
1040 kmem_cache_free(stateowner_slab, sop);
1045 static struct nfs4_stateowner *
1046 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1047 struct nfs4_stateowner *sop;
1048 struct nfs4_replay *rp;
1049 unsigned int idhashval;
1051 if (!(sop = alloc_stateowner(&open->op_owner)))
1053 idhashval = ownerid_hashval(current_ownerid);
1054 INIT_LIST_HEAD(&sop->so_idhash);
1055 INIT_LIST_HEAD(&sop->so_strhash);
1056 INIT_LIST_HEAD(&sop->so_perclient);
1057 INIT_LIST_HEAD(&sop->so_perfilestate);
1058 INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */
1059 INIT_LIST_HEAD(&sop->so_close_lru);
1061 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1062 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1063 list_add(&sop->so_perclient, &clp->cl_perclient);
1065 sop->so_is_open_owner = 1;
1066 sop->so_id = current_ownerid++;
1067 sop->so_client = clp;
1068 sop->so_seqid = open->op_seqid;
1069 sop->so_confirmed = 0;
1070 rp = &sop->so_replay;
1071 rp->rp_status = NFSERR_SERVERFAULT;
1073 rp->rp_buf = rp->rp_ibuf;
1078 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1080 struct nfs4_stateowner *lock_sop;
1082 while (!list_empty(&open_stp->st_perlockowner)) {
1083 lock_sop = list_entry(open_stp->st_perlockowner.next,
1084 struct nfs4_stateowner, so_perlockowner);
1085 /* list_del(&open_stp->st_perlockowner); */
1086 BUG_ON(lock_sop->so_is_open_owner);
1087 release_stateowner(lock_sop);
1092 unhash_stateowner(struct nfs4_stateowner *sop)
1094 struct nfs4_stateid *stp;
1096 list_del(&sop->so_idhash);
1097 list_del(&sop->so_strhash);
1098 if (sop->so_is_open_owner) {
1099 list_del(&sop->so_perclient);
1102 list_del(&sop->so_perlockowner);
1103 while (!list_empty(&sop->so_perfilestate)) {
1104 stp = list_entry(sop->so_perfilestate.next,
1105 struct nfs4_stateid, st_perfilestate);
1106 if (sop->so_is_open_owner)
1107 release_stateid(stp, OPEN_STATE);
1109 release_stateid(stp, LOCK_STATE);
1114 release_stateowner(struct nfs4_stateowner *sop)
1116 unhash_stateowner(sop);
1117 list_del(&sop->so_close_lru);
1118 nfs4_put_stateowner(sop);
1122 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1123 struct nfs4_stateowner *sop = open->op_stateowner;
1124 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1126 INIT_LIST_HEAD(&stp->st_hash);
1127 INIT_LIST_HEAD(&stp->st_perfilestate);
1128 INIT_LIST_HEAD(&stp->st_perlockowner);
1129 INIT_LIST_HEAD(&stp->st_perfile);
1130 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1131 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
1133 list_add(&stp->st_perfile, &fp->fi_perfile);
1134 stp->st_stateowner = sop;
1136 stp->st_stateid.si_boot = boot_time;
1137 stp->st_stateid.si_stateownerid = sop->so_id;
1138 stp->st_stateid.si_fileid = fp->fi_id;
1139 stp->st_stateid.si_generation = 0;
1140 stp->st_access_bmap = 0;
1141 stp->st_deny_bmap = 0;
1142 __set_bit(open->op_share_access, &stp->st_access_bmap);
1143 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1147 release_stateid(struct nfs4_stateid *stp, int flags)
1149 struct file *filp = stp->st_vfs_file;
1151 list_del(&stp->st_hash);
1153 list_del(&stp->st_perfile);
1154 list_del(&stp->st_perfilestate);
1155 if (flags & OPEN_STATE) {
1156 release_stateid_lockowners(stp);
1157 stp->st_vfs_file = NULL;
1160 } else if (flags & LOCK_STATE)
1161 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1167 release_file(struct nfs4_file *fp)
1170 list_del(&fp->fi_hash);
1176 move_to_close_lru(struct nfs4_stateowner *sop)
1178 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1180 unhash_stateowner(sop);
1181 list_add_tail(&sop->so_close_lru, &close_lru);
1182 sop->so_time = get_seconds();
1186 release_state_owner(struct nfs4_stateid *stp, int flag)
1188 struct nfs4_stateowner *sop = stp->st_stateowner;
1189 struct nfs4_file *fp = stp->st_file;
1191 dprintk("NFSD: release_state_owner\n");
1192 release_stateid(stp, flag);
1194 /* place unused nfs4_stateowners on so_close_lru list to be
1195 * released by the laundromat service after the lease period
1196 * to enable us to handle CLOSE replay
1198 if (sop->so_confirmed && list_empty(&sop->so_perfilestate))
1199 move_to_close_lru(sop);
1200 /* unused nfs4_file's are releseed. XXX slab cache? */
1201 if (list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile)) {
1207 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1208 return ((sop->so_owner.len == owner->len) &&
1209 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1210 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1213 static struct nfs4_stateowner *
1214 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1216 struct nfs4_stateowner *so = NULL;
1218 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1219 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1225 /* search file_hashtbl[] for file */
1226 static struct nfs4_file *
1227 find_file(struct inode *ino)
1229 unsigned int hashval = file_hashval(ino);
1230 struct nfs4_file *fp;
1232 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1233 if (fp->fi_inode == ino)
1239 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1240 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1243 set_access(unsigned int *access, unsigned long bmap) {
1247 for (i = 1; i < 4; i++) {
1248 if (test_bit(i, &bmap))
1254 set_deny(unsigned int *deny, unsigned long bmap) {
1258 for (i = 0; i < 4; i++) {
1259 if (test_bit(i, &bmap))
1265 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1266 unsigned int access, deny;
1268 set_access(&access, stp->st_access_bmap);
1269 set_deny(&deny, stp->st_deny_bmap);
1270 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1276 * Called to check deny when READ with all zero stateid or
1277 * WRITE with all zero or all one stateid
1280 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1282 struct inode *ino = current_fh->fh_dentry->d_inode;
1283 struct nfs4_file *fp;
1284 struct nfs4_stateid *stp;
1286 dprintk("NFSD: nfs4_share_conflict\n");
1288 fp = find_file(ino);
1290 /* Search for conflicting share reservations */
1291 list_for_each_entry(stp, &fp->fi_perfile, st_perfile) {
1292 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1293 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1294 return nfserr_share_denied;
1301 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1303 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1304 put_write_access(filp->f_dentry->d_inode);
1305 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1310 * Recall a delegation
1313 do_recall(void *__dp)
1315 struct nfs4_delegation *dp = __dp;
1317 daemonize("nfsv4-recall");
1319 nfsd4_cb_recall(dp);
1324 * Spawn a thread to perform a recall on the delegation represented
1325 * by the lease (file_lock)
1327 * Called from break_lease() with lock_kernel() held.
1328 * Note: we assume break_lease will only call this *once* for any given
1332 void nfsd_break_deleg_cb(struct file_lock *fl)
1334 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1335 struct task_struct *t;
1337 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1341 /* We're assuming the state code never drops its reference
1342 * without first removing the lease. Since we're in this lease
1343 * callback (and since the lease code is serialized by the kernel
1344 * lock) we know the server hasn't removed the lease yet, we know
1345 * it's safe to take a reference: */
1346 atomic_inc(&dp->dl_count);
1348 spin_lock(&recall_lock);
1349 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1350 spin_unlock(&recall_lock);
1352 /* only place dl_time is set. protected by lock_kernel*/
1353 dp->dl_time = get_seconds();
1355 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1356 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1358 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1360 struct nfs4_client *clp = dp->dl_client;
1362 printk(KERN_INFO "NFSD: Callback thread failed for "
1363 "for client (clientid %08x/%08x)\n",
1364 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1365 nfs4_put_delegation(dp);
1370 * The file_lock is being reapd.
1372 * Called by locks_free_lock() with lock_kernel() held.
1375 void nfsd_release_deleg_cb(struct file_lock *fl)
1377 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1379 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1381 if (!(fl->fl_flags & FL_LEASE) || !dp)
1383 dp->dl_flock = NULL;
1387 * Set the delegation file_lock back pointer.
1389 * Called from __setlease() with lock_kernel() held.
1392 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1394 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1396 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1403 * Called from __setlease() with lock_kernel() held
1406 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1408 struct nfs4_delegation *onlistd =
1409 (struct nfs4_delegation *)onlist->fl_owner;
1410 struct nfs4_delegation *tryd =
1411 (struct nfs4_delegation *)try->fl_owner;
1413 if (onlist->fl_lmops != try->fl_lmops)
1416 return onlistd->dl_client == tryd->dl_client;
1421 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1424 return lease_modify(onlist, arg);
1429 struct lock_manager_operations nfsd_lease_mng_ops = {
1430 .fl_break = nfsd_break_deleg_cb,
1431 .fl_release_private = nfsd_release_deleg_cb,
1432 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1433 .fl_mylease = nfsd_same_client_deleg_cb,
1434 .fl_change = nfsd_change_deleg_cb,
1439 * nfsd4_process_open1()
1440 * lookup stateowner.
1452 * called with nfs4_lock_state() held.
1455 nfsd4_process_open1(struct nfsd4_open *open)
1458 clientid_t *clientid = &open->op_clientid;
1459 struct nfs4_client *clp = NULL;
1460 unsigned int strhashval;
1461 struct nfs4_stateowner *sop = NULL;
1463 status = nfserr_inval;
1464 if (!check_name(open->op_owner))
1467 if (STALE_CLIENTID(&open->op_clientid))
1468 return nfserr_stale_clientid;
1470 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1471 sop = find_openstateowner_str(strhashval, open);
1473 open->op_stateowner = sop;
1474 /* check for replay */
1475 if (open->op_seqid == sop->so_seqid){
1476 if (sop->so_replay.rp_buflen)
1477 return NFSERR_REPLAY_ME;
1479 /* The original OPEN failed so spectacularly
1480 * that we don't even have replay data saved!
1481 * Therefore, we have no choice but to continue
1482 * processing this OPEN; presumably, we'll
1483 * fail again for the same reason.
1485 dprintk("nfsd4_process_open1:"
1486 " replay with no replay cache\n");
1489 } else if (sop->so_confirmed) {
1490 if (open->op_seqid == sop->so_seqid + 1)
1492 status = nfserr_bad_seqid;
1495 /* If we get here, we received an OPEN for an
1496 * unconfirmed nfs4_stateowner. Since the seqid's are
1497 * different, purge the existing nfs4_stateowner, and
1498 * instantiate a new one.
1500 clp = sop->so_client;
1501 release_stateowner(sop);
1504 /* nfs4_stateowner not found.
1505 * Verify clientid and instantiate new nfs4_stateowner.
1506 * If verify fails this is presumably the result of the
1507 * client's lease expiring.
1509 status = nfserr_expired;
1510 clp = find_confirmed_client(clientid);
1514 status = nfserr_resource;
1515 sop = alloc_init_open_stateowner(strhashval, clp, open);
1518 open->op_stateowner = sop;
1521 renew_client(sop->so_client);
1523 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1524 status = nfserr_reclaim_bad;
1529 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1531 struct nfs4_stateid *local;
1532 int status = nfserr_share_denied;
1533 struct nfs4_stateowner *sop = open->op_stateowner;
1535 list_for_each_entry(local, &fp->fi_perfile, st_perfile) {
1536 /* ignore lock owners */
1537 if (local->st_stateowner->so_is_open_owner == 0)
1539 /* remember if we have seen this open owner */
1540 if (local->st_stateowner == sop)
1542 /* check for conflicting share reservations */
1543 if (!test_share(local, open))
1552 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1553 struct svc_fh *cur_fh, int flags)
1555 struct nfs4_stateid *stp;
1558 stp = kmalloc(sizeof(struct nfs4_stateid), GFP_KERNEL);
1560 return nfserr_resource;
1562 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, &stp->st_vfs_file);
1564 if (status == nfserr_dropit)
1565 status = nfserr_jukebox;
1575 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1576 struct nfsd4_open *open)
1578 struct iattr iattr = {
1579 .ia_valid = ATTR_SIZE,
1582 if (!open->op_truncate)
1584 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1586 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1590 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1592 struct file *filp = stp->st_vfs_file;
1593 struct inode *inode = filp->f_dentry->d_inode;
1594 unsigned int share_access;
1597 set_access(&share_access, stp->st_access_bmap);
1598 share_access = ~share_access;
1599 share_access &= open->op_share_access;
1601 if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
1602 return nfsd4_truncate(rqstp, cur_fh, open);
1604 status = get_write_access(inode);
1606 return nfserrno(status);
1607 status = nfsd4_truncate(rqstp, cur_fh, open);
1609 put_write_access(inode);
1612 /* remember the open */
1613 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
1614 set_bit(open->op_share_access, &stp->st_access_bmap);
1615 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1621 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1623 nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
1625 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
1627 *status = nfserr_reclaim_bad;
1629 open->op_stateowner->so_confirmed = 1;
1630 open->op_stateowner->so_seqid--;
1636 * Attempt to hand out a delegation.
1639 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1641 struct nfs4_delegation *dp;
1642 struct nfs4_stateowner *sop = stp->st_stateowner;
1643 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1644 struct file_lock fl, *flp = &fl;
1645 int status, flag = 0;
1647 flag = NFS4_OPEN_DELEGATE_NONE;
1648 if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL
1649 || !atomic_read(&cb->cb_set) || !sop->so_confirmed)
1652 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1653 flag = NFS4_OPEN_DELEGATE_WRITE;
1655 flag = NFS4_OPEN_DELEGATE_READ;
1657 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1659 flag = NFS4_OPEN_DELEGATE_NONE;
1662 locks_init_lock(&fl);
1663 fl.fl_lmops = &nfsd_lease_mng_ops;
1664 fl.fl_flags = FL_LEASE;
1665 fl.fl_end = OFFSET_MAX;
1666 fl.fl_owner = (fl_owner_t)dp;
1667 fl.fl_file = stp->st_vfs_file;
1668 fl.fl_pid = current->tgid;
1670 /* setlease checks to see if delegation should be handed out.
1671 * the lock_manager callbacks fl_mylease and fl_change are used
1673 if ((status = setlease(stp->st_vfs_file,
1674 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1675 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1676 list_del(&dp->dl_del_perfile);
1677 list_del(&dp->dl_del_perclnt);
1678 nfs4_put_delegation(dp);
1680 flag = NFS4_OPEN_DELEGATE_NONE;
1684 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1686 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1687 dp->dl_stateid.si_boot,
1688 dp->dl_stateid.si_stateownerid,
1689 dp->dl_stateid.si_fileid,
1690 dp->dl_stateid.si_generation);
1692 open->op_delegate_type = flag;
1696 * called with nfs4_lock_state() held.
1699 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1701 struct nfs4_file *fp = NULL;
1702 struct inode *ino = current_fh->fh_dentry->d_inode;
1703 struct nfs4_stateid *stp = NULL;
1706 status = nfserr_inval;
1707 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
1710 * Lookup file; if found, lookup stateid and check open request,
1711 * and check for delegations in the process of being recalled.
1712 * If not found, create the nfs4_file struct
1714 fp = find_file(ino);
1716 if ((status = nfs4_check_open(fp, open, &stp)))
1719 status = nfserr_resource;
1720 fp = alloc_init_file(ino);
1726 * OPEN the file, or upgrade an existing OPEN.
1727 * If truncate fails, the OPEN fails.
1730 /* Stateid was found, this is an OPEN upgrade */
1731 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1735 /* Stateid was not found, this is a new OPEN */
1737 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1741 if ((status = nfs4_new_open(rqstp, &stp, current_fh, flags)))
1743 init_stateid(stp, fp, open);
1744 status = nfsd4_truncate(rqstp, current_fh, open);
1746 release_stateid(stp, OPEN_STATE);
1750 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1753 * Attempt to hand out a delegation. No error return, because the
1754 * OPEN succeeds even if we fail.
1756 nfs4_open_delegation(current_fh, open, stp);
1760 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1761 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1762 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1764 /* take the opportunity to clean up unused state */
1765 if (fp && list_empty(&fp->fi_perfile) && list_empty(&fp->fi_del_perfile))
1768 /* CLAIM_PREVIOUS has different error returns */
1769 nfs4_set_claim_prev(open, &status);
1771 * To finish the open response, we just need to set the rflags.
1773 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1774 if (!open->op_stateowner->so_confirmed)
1775 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1780 static struct work_struct laundromat_work;
1781 static void laundromat_main(void *);
1782 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1785 nfsd4_renew(clientid_t *clid)
1787 struct nfs4_client *clp;
1791 dprintk("process_renew(%08x/%08x): starting\n",
1792 clid->cl_boot, clid->cl_id);
1793 status = nfserr_stale_clientid;
1794 if (STALE_CLIENTID(clid))
1796 clp = find_confirmed_client(clid);
1797 status = nfserr_expired;
1799 /* We assume the client took too long to RENEW. */
1800 dprintk("nfsd4_renew: clientid not found!\n");
1804 status = nfserr_cb_path_down;
1805 if (!list_empty(&clp->cl_del_perclnt)
1806 && !atomic_read(&clp->cl_callback.cb_set))
1810 nfs4_unlock_state();
1815 nfs4_laundromat(void)
1817 struct nfs4_client *clp;
1818 struct nfs4_stateowner *sop;
1819 struct nfs4_delegation *dp;
1820 struct list_head *pos, *next, reaplist;
1821 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1822 time_t t, clientid_val = NFSD_LEASE_TIME;
1823 time_t u, test_val = NFSD_LEASE_TIME;
1827 dprintk("NFSD: laundromat service - starting\n");
1828 list_for_each_safe(pos, next, &client_lru) {
1829 clp = list_entry(pos, struct nfs4_client, cl_lru);
1830 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1831 t = clp->cl_time - cutoff;
1832 if (clientid_val > t)
1836 dprintk("NFSD: purging unused client (clientid %08x)\n",
1837 clp->cl_clientid.cl_id);
1840 INIT_LIST_HEAD(&reaplist);
1841 spin_lock(&recall_lock);
1842 list_for_each_safe(pos, next, &del_recall_lru) {
1843 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1844 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1845 u = dp->dl_time - cutoff;
1850 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1852 list_move(&dp->dl_recall_lru, &reaplist);
1854 spin_unlock(&recall_lock);
1855 list_for_each_safe(pos, next, &reaplist) {
1856 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1857 list_del_init(&dp->dl_recall_lru);
1858 unhash_delegation(dp);
1860 test_val = NFSD_LEASE_TIME;
1861 list_for_each_safe(pos, next, &close_lru) {
1862 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1863 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1864 u = sop->so_time - cutoff;
1869 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1871 list_del(&sop->so_close_lru);
1872 nfs4_put_stateowner(sop);
1874 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1875 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1876 nfs4_unlock_state();
1877 return clientid_val;
1881 laundromat_main(void *not_used)
1885 t = nfs4_laundromat();
1886 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1887 schedule_delayed_work(&laundromat_work, t*HZ);
1890 /* search ownerid_hashtbl[] and close_lru for stateid owner
1891 * (stateid->si_stateownerid)
1893 struct nfs4_stateowner *
1894 find_openstateowner_id(u32 st_id, int flags) {
1895 struct nfs4_stateowner *local = NULL;
1897 dprintk("NFSD: find_openstateowner_id %d\n", st_id);
1898 if (flags & CLOSE_STATE) {
1899 list_for_each_entry(local, &close_lru, so_close_lru) {
1900 if (local->so_id == st_id)
1908 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1910 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
1914 STALE_STATEID(stateid_t *stateid)
1916 if (stateid->si_boot == boot_time)
1918 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1919 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1920 stateid->si_generation);
1925 access_permit_read(unsigned long access_bmap)
1927 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1928 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1929 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
1933 access_permit_write(unsigned long access_bmap)
1935 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
1936 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
1940 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
1942 int status = nfserr_openmode;
1944 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
1946 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
1954 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1956 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1957 return nfserr_openmode;
1963 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
1965 /* Trying to call delegreturn with a special stateid? Yuch: */
1966 if (!(flags & (RD_STATE | WR_STATE)))
1967 return nfserr_bad_stateid;
1968 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
1970 else if (nfs4_in_grace()) {
1971 /* Answer in remaining cases depends on existance of
1972 * conflicting state; so we must wait out the grace period. */
1973 return nfserr_grace;
1974 } else if (flags & WR_STATE)
1975 return nfs4_share_conflict(current_fh,
1976 NFS4_SHARE_DENY_WRITE);
1977 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
1978 return nfs4_share_conflict(current_fh,
1979 NFS4_SHARE_DENY_READ);
1983 * Allow READ/WRITE during grace period on recovered state only for files
1984 * that are not able to provide mandatory locking.
1987 io_during_grace_disallowed(struct inode *inode, int flags)
1989 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
1990 && MANDATORY_LOCK(inode);
1994 * Checks for stateid operations
1997 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
1999 struct nfs4_stateid *stp = NULL;
2000 struct nfs4_delegation *dp = NULL;
2002 struct inode *ino = current_fh->fh_dentry->d_inode;
2005 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2006 stateid->si_boot, stateid->si_stateownerid,
2007 stateid->si_fileid, stateid->si_generation);
2011 if (io_during_grace_disallowed(ino, flags))
2012 return nfserr_grace;
2014 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2015 return check_special_stateids(current_fh, stateid, flags);
2018 status = nfserr_stale_stateid;
2019 if (STALE_STATEID(stateid))
2023 status = nfserr_bad_stateid;
2024 if (!stateid->si_fileid) { /* delegation stateid */
2025 if(!(dp = find_delegation_stateid(ino, stateid))) {
2026 dprintk("NFSD: delegation stateid not found\n");
2027 if (nfs4_in_grace())
2028 status = nfserr_grace;
2031 stidp = &dp->dl_stateid;
2032 } else { /* open or lock stateid */
2033 if (!(stp = find_stateid(stateid, flags))) {
2034 dprintk("NFSD: open or lock stateid not found\n");
2035 if (nfs4_in_grace())
2036 status = nfserr_grace;
2039 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2041 if (!stp->st_stateowner->so_confirmed)
2043 stidp = &stp->st_stateid;
2045 if (stateid->si_generation > stidp->si_generation)
2049 status = nfserr_old_stateid;
2050 if (stateid->si_generation < stidp->si_generation)
2053 if ((status = nfs4_check_openmode(stp,flags)))
2055 renew_client(stp->st_stateowner->so_client);
2057 *filpp = stp->st_vfs_file;
2059 if ((status = nfs4_check_delegmode(dp, flags)))
2061 renew_client(dp->dl_client);
2062 if (flags & DELEG_RET)
2063 unhash_delegation(dp);
2065 *filpp = dp->dl_vfs_file;
2074 * Checks for sequence id mutating operations.
2077 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)
2080 struct nfs4_stateid *stp;
2081 struct nfs4_stateowner *sop;
2083 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2084 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2085 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2086 stateid->si_generation);
2091 status = nfserr_bad_stateid;
2092 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2093 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2097 status = nfserr_stale_stateid;
2098 if (STALE_STATEID(stateid))
2101 * We return BAD_STATEID if filehandle doesn't match stateid,
2102 * the confirmed flag is incorrecly set, or the generation
2103 * number is incorrect.
2104 * If there is no entry in the openfile table for this id,
2105 * we can't always return BAD_STATEID;
2106 * this might be a retransmitted CLOSE which has arrived after
2107 * the openfile has been released.
2109 if (!(stp = find_stateid(stateid, flags)))
2110 goto no_nfs4_stateid;
2112 status = nfserr_bad_stateid;
2114 /* for new lock stateowners:
2115 * check that the lock->v.new.open_stateid
2116 * refers to an open stateowner
2118 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2119 * as the open_stateid->st_stateowner->so_client->clientid
2122 struct nfs4_stateowner *sop = stp->st_stateowner;
2123 struct nfs4_client *clp = sop->so_client;
2125 if (!sop->so_is_open_owner)
2127 if (!cmp_clid(&clp->cl_clientid, lockclid))
2131 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2132 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2137 *sopp = sop = stp->st_stateowner;
2140 * We now validate the seqid and stateid generation numbers.
2141 * For the moment, we ignore the possibility of
2142 * generation number wraparound.
2144 if (seqid != sop->so_seqid + 1)
2147 if (sop->so_confirmed) {
2148 if (flags & CONFIRM) {
2149 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2154 if (!(flags & CONFIRM)) {
2155 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2159 if (stateid->si_generation > stp->st_stateid.si_generation) {
2160 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2164 status = nfserr_old_stateid;
2165 if (stateid->si_generation < stp->st_stateid.si_generation) {
2166 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2169 /* XXX renew the client lease here */
2178 * We determine whether this is a bad stateid or a replay,
2179 * starting by trying to look up the stateowner.
2180 * If stateowner is not found - stateid is bad.
2182 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) {
2183 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2184 status = nfserr_bad_stateid;
2190 if (seqid == sop->so_seqid) {
2191 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2192 /* indicate replay to calling function */
2193 status = NFSERR_REPLAY_ME;
2195 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
2198 status = nfserr_bad_seqid;
2204 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
2207 struct nfs4_stateowner *sop;
2208 struct nfs4_stateid *stp;
2210 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2211 (int)current_fh->fh_dentry->d_name.len,
2212 current_fh->fh_dentry->d_name.name);
2214 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2219 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2220 &oc->oc_req_stateid,
2221 CHECK_FH | CONFIRM | OPEN_STATE,
2222 &oc->oc_stateowner, &stp, NULL)))
2225 sop = oc->oc_stateowner;
2226 sop->so_confirmed = 1;
2227 update_stateid(&stp->st_stateid);
2228 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2229 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2230 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2231 stp->st_stateid.si_boot,
2232 stp->st_stateid.si_stateownerid,
2233 stp->st_stateid.si_fileid,
2234 stp->st_stateid.si_generation);
2236 if (oc->oc_stateowner)
2237 nfs4_get_stateowner(oc->oc_stateowner);
2238 nfs4_unlock_state();
2244 * unset all bits in union bitmap (bmap) that
2245 * do not exist in share (from successful OPEN_DOWNGRADE)
2248 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2251 for (i = 1; i < 4; i++) {
2252 if ((i & access) != i)
2253 __clear_bit(i, bmap);
2258 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2261 for (i = 0; i < 4; i++) {
2262 if ((i & deny) != i)
2263 __clear_bit(i, bmap);
2268 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
2271 struct nfs4_stateid *stp;
2272 unsigned int share_access;
2274 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2275 (int)current_fh->fh_dentry->d_name.len,
2276 current_fh->fh_dentry->d_name.name);
2278 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
2279 return nfserr_inval;
2282 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
2284 CHECK_FH | OPEN_STATE,
2285 &od->od_stateowner, &stp, NULL)))
2288 status = nfserr_inval;
2289 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2290 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2291 stp->st_access_bmap, od->od_share_access);
2294 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2295 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2296 stp->st_deny_bmap, od->od_share_deny);
2299 set_access(&share_access, stp->st_access_bmap);
2300 nfs4_file_downgrade(stp->st_vfs_file,
2301 share_access & ~od->od_share_access);
2303 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2304 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2306 update_stateid(&stp->st_stateid);
2307 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2310 if (od->od_stateowner)
2311 nfs4_get_stateowner(od->od_stateowner);
2312 nfs4_unlock_state();
2317 * nfs4_unlock_state() called after encode
2320 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
2323 struct nfs4_stateid *stp;
2325 dprintk("NFSD: nfsd4_close on file %.*s\n",
2326 (int)current_fh->fh_dentry->d_name.len,
2327 current_fh->fh_dentry->d_name.name);
2330 /* check close_lru for replay */
2331 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2333 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2334 &close->cl_stateowner, &stp, NULL)))
2337 * Return success, but first update the stateid.
2340 update_stateid(&stp->st_stateid);
2341 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2343 /* release_state_owner() calls nfsd_close() if needed */
2344 release_state_owner(stp, OPEN_STATE);
2346 if (close->cl_stateowner)
2347 nfs4_get_stateowner(close->cl_stateowner);
2348 nfs4_unlock_state();
2353 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2357 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2361 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2362 nfs4_unlock_state();
2369 * Lock owner state (byte-range locks)
2371 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2372 #define LOCK_HASH_BITS 8
2373 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2374 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2376 #define lockownerid_hashval(id) \
2377 ((id) & LOCK_HASH_MASK)
2379 static inline unsigned int
2380 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2381 struct xdr_netobj *ownername)
2383 return (file_hashval(inode) + cl_id
2384 + opaque_hashval(ownername->data, ownername->len))
2388 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2389 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2390 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2392 struct nfs4_stateid *
2393 find_stateid(stateid_t *stid, int flags)
2395 struct nfs4_stateid *local = NULL;
2396 u32 st_id = stid->si_stateownerid;
2397 u32 f_id = stid->si_fileid;
2398 unsigned int hashval;
2400 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2401 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2402 hashval = stateid_hashval(st_id, f_id);
2403 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2404 if ((local->st_stateid.si_stateownerid == st_id) &&
2405 (local->st_stateid.si_fileid == f_id))
2409 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2410 hashval = stateid_hashval(st_id, f_id);
2411 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2412 if ((local->st_stateid.si_stateownerid == st_id) &&
2413 (local->st_stateid.si_fileid == f_id))
2417 printk("NFSD: find_stateid: ERROR: no state flag\n");
2421 static struct nfs4_delegation *
2422 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2424 struct nfs4_delegation *dp = NULL;
2425 struct nfs4_file *fp = NULL;
2428 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2429 stid->si_boot, stid->si_stateownerid,
2430 stid->si_fileid, stid->si_generation);
2432 st_id = stid->si_stateownerid;
2433 fp = find_file(ino);
2435 list_for_each_entry(dp, &fp->fi_del_perfile, dl_del_perfile) {
2436 if(dp->dl_stateid.si_stateownerid == st_id) {
2437 dprintk("NFSD: find_delegation dp %p\n",dp);
2446 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2447 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2448 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2449 * locking, this prevents us from being completely protocol-compliant. The
2450 * real solution to this problem is to start using unsigned file offsets in
2451 * the VFS, but this is a very deep change!
2454 nfs4_transform_lock_offset(struct file_lock *lock)
2456 if (lock->fl_start < 0)
2457 lock->fl_start = OFFSET_MAX;
2458 if (lock->fl_end < 0)
2459 lock->fl_end = OFFSET_MAX;
2463 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
2465 struct nfs4_stateowner *local = NULL;
2468 if (hashval >= LOCK_HASH_SIZE)
2470 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) {
2482 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2484 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
2485 unsigned int hval = lockownerid_hashval(sop->so_id);
2487 deny->ld_sop = NULL;
2488 if (nfs4_verify_lock_stateowner(sop, hval)) {
2489 kref_get(&sop->so_ref);
2491 deny->ld_clientid = sop->so_client->cl_clientid;
2493 deny->ld_start = fl->fl_start;
2494 deny->ld_length = ~(u64)0;
2495 if (fl->fl_end != ~(u64)0)
2496 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2497 deny->ld_type = NFS4_READ_LT;
2498 if (fl->fl_type != F_RDLCK)
2499 deny->ld_type = NFS4_WRITE_LT;
2502 static struct nfs4_stateowner *
2503 find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid)
2505 struct nfs4_stateowner *local = NULL;
2508 for (i = 0; i < LOCK_HASH_SIZE; i++) {
2509 list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) {
2510 if (!cmp_owner_str(local, owner, clid))
2518 static struct nfs4_stateowner *
2519 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2520 struct xdr_netobj *owner)
2522 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2523 struct nfs4_stateowner *op;
2525 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2526 if (cmp_owner_str(op, owner, clid))
2533 * Alloc a lock owner structure.
2534 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2537 * strhashval = lock_ownerstr_hashval
2538 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2541 static struct nfs4_stateowner *
2542 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2543 struct nfs4_stateowner *sop;
2544 struct nfs4_replay *rp;
2545 unsigned int idhashval;
2547 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2549 idhashval = lockownerid_hashval(current_ownerid);
2550 INIT_LIST_HEAD(&sop->so_idhash);
2551 INIT_LIST_HEAD(&sop->so_strhash);
2552 INIT_LIST_HEAD(&sop->so_perclient);
2553 INIT_LIST_HEAD(&sop->so_perfilestate);
2554 INIT_LIST_HEAD(&sop->so_perlockowner);
2555 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2557 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2558 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2559 list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
2560 sop->so_is_open_owner = 0;
2561 sop->so_id = current_ownerid++;
2562 sop->so_client = clp;
2563 sop->so_seqid = lock->lk_new_lock_seqid - 1;
2564 sop->so_confirmed = 1;
2565 rp = &sop->so_replay;
2566 rp->rp_status = NFSERR_SERVERFAULT;
2568 rp->rp_buf = rp->rp_ibuf;
2572 struct nfs4_stateid *
2573 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2575 struct nfs4_stateid *stp;
2576 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2578 if ((stp = kmalloc(sizeof(struct nfs4_stateid),
2579 GFP_KERNEL)) == NULL)
2581 INIT_LIST_HEAD(&stp->st_hash);
2582 INIT_LIST_HEAD(&stp->st_perfile);
2583 INIT_LIST_HEAD(&stp->st_perfilestate);
2584 INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */
2585 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2586 list_add(&stp->st_perfile, &fp->fi_perfile);
2588 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
2589 stp->st_stateowner = sop;
2591 stp->st_stateid.si_boot = boot_time;
2592 stp->st_stateid.si_stateownerid = sop->so_id;
2593 stp->st_stateid.si_fileid = fp->fi_id;
2594 stp->st_stateid.si_generation = 0;
2595 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2596 stp->st_access_bmap = open_stp->st_access_bmap;
2597 stp->st_deny_bmap = open_stp->st_deny_bmap;
2604 check_lock_length(u64 offset, u64 length)
2606 return ((length == 0) || ((length != ~(u64)0) &&
2607 LOFF_OVERFLOW(offset, length)));
2614 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
2616 struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL;
2617 struct nfs4_stateid *lock_stp;
2619 struct file_lock file_lock;
2620 struct file_lock *conflock;
2622 unsigned int strhashval;
2624 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2625 (long long) lock->lk_offset,
2626 (long long) lock->lk_length);
2628 if (nfs4_in_grace() && !lock->lk_reclaim)
2629 return nfserr_grace;
2630 if (!nfs4_in_grace() && lock->lk_reclaim)
2631 return nfserr_no_grace;
2633 if (check_lock_length(lock->lk_offset, lock->lk_length))
2634 return nfserr_inval;
2638 if (lock->lk_is_new) {
2640 * Client indicates that this is a new lockowner.
2641 * Use open owner and open stateid to create lock owner and lock
2644 struct nfs4_stateid *open_stp = NULL;
2645 struct nfs4_file *fp;
2647 status = nfserr_stale_clientid;
2648 if (STALE_CLIENTID(&lock->lk_new_clientid)) {
2649 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2653 /* is the new lock seqid presented by the client zero? */
2654 status = nfserr_bad_seqid;
2655 if (lock->v.new.lock_seqid != 0)
2658 /* validate and update open stateid and open seqid */
2659 status = nfs4_preprocess_seqid_op(current_fh,
2660 lock->lk_new_open_seqid,
2661 &lock->lk_new_open_stateid,
2662 CHECK_FH | OPEN_STATE,
2663 &open_sop, &open_stp,
2664 &lock->v.new.clientid);
2666 if (lock->lk_reclaim)
2667 status = nfserr_reclaim_bad;
2670 /* create lockowner and lock stateid */
2671 fp = open_stp->st_file;
2672 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2673 open_sop->so_client->cl_clientid.cl_id,
2674 &lock->v.new.owner);
2676 * If we already have this lock owner, the client is in
2677 * error (or our bookeeping is wrong!)
2678 * for asking for a 'new lock'.
2680 status = nfserr_bad_stateid;
2681 lock_sop = find_lockstateowner(&lock->v.new.owner,
2682 &lock->v.new.clientid);
2685 status = nfserr_resource;
2686 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
2688 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
2689 fp, open_stp)) == NULL) {
2690 release_stateowner(lock->lk_stateowner);
2691 lock->lk_stateowner = NULL;
2694 /* bump the open seqid used to create the lock */
2695 open_sop->so_seqid++;
2697 /* lock (lock owner + lock stateid) already exists */
2698 status = nfs4_preprocess_seqid_op(current_fh,
2699 lock->lk_old_lock_seqid,
2700 &lock->lk_old_lock_stateid,
2701 CHECK_FH | LOCK_STATE,
2702 &lock->lk_stateowner, &lock_stp, NULL);
2706 /* lock->lk_stateowner and lock_stp have been created or found */
2707 filp = lock_stp->st_vfs_file;
2709 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2710 printk("NFSD: nfsd4_lock: permission denied!\n");
2714 locks_init_lock(&file_lock);
2715 switch (lock->lk_type) {
2718 file_lock.fl_type = F_RDLCK;
2721 case NFS4_WRITEW_LT:
2722 file_lock.fl_type = F_WRLCK;
2725 status = nfserr_inval;
2728 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
2729 file_lock.fl_pid = current->tgid;
2730 file_lock.fl_file = filp;
2731 file_lock.fl_flags = FL_POSIX;
2733 file_lock.fl_start = lock->lk_offset;
2734 if ((lock->lk_length == ~(u64)0) ||
2735 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2736 file_lock.fl_end = ~(u64)0;
2738 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2739 nfs4_transform_lock_offset(&file_lock);
2742 * Try to lock the file in the VFS.
2743 * Note: locks.c uses the BKL to protect the inode's lock list.
2746 status = posix_lock_file(filp, &file_lock);
2747 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2748 file_lock.fl_ops->fl_release_private(&file_lock);
2749 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status);
2751 case 0: /* success! */
2752 update_stateid(&lock_stp->st_stateid);
2753 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2757 goto conflicting_lock;
2759 status = nfserr_deadlock;
2761 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
2762 goto out_destroy_new_stateid;
2766 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2767 status = nfserr_denied;
2768 /* XXX There is a race here. Future patch needed to provide
2769 * an atomic posix_lock_and_test_file
2771 if (!(conflock = posix_test_lock(filp, &file_lock))) {
2772 status = nfserr_serverfault;
2775 nfs4_set_lock_denied(conflock, &lock->lk_denied);
2777 out_destroy_new_stateid:
2778 if (lock->lk_is_new) {
2779 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2781 * An error encountered after instantiation of the new
2782 * stateid has forced us to destroy it.
2784 if (!seqid_mutating_err(status))
2785 open_sop->so_seqid--;
2787 release_state_owner(lock_stp, LOCK_STATE);
2790 if (lock->lk_stateowner)
2791 nfs4_get_stateowner(lock->lk_stateowner);
2792 nfs4_unlock_state();
2800 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2802 struct inode *inode;
2804 struct file_lock file_lock;
2805 struct file_lock *conflicting_lock;
2808 if (nfs4_in_grace())
2809 return nfserr_grace;
2811 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2812 return nfserr_inval;
2814 lockt->lt_stateowner = NULL;
2817 status = nfserr_stale_clientid;
2818 if (STALE_CLIENTID(&lockt->lt_clientid)) {
2819 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2823 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2824 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2825 if (status == nfserr_symlink)
2826 status = nfserr_inval;
2830 inode = current_fh->fh_dentry->d_inode;
2831 locks_init_lock(&file_lock);
2832 switch (lockt->lt_type) {
2835 file_lock.fl_type = F_RDLCK;
2838 case NFS4_WRITEW_LT:
2839 file_lock.fl_type = F_WRLCK;
2842 printk("NFSD: nfs4_lockt: bad lock type!\n");
2843 status = nfserr_inval;
2847 lockt->lt_stateowner = find_lockstateowner_str(inode,
2848 &lockt->lt_clientid, &lockt->lt_owner);
2849 if (lockt->lt_stateowner)
2850 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2851 file_lock.fl_pid = current->tgid;
2852 file_lock.fl_flags = FL_POSIX;
2854 file_lock.fl_start = lockt->lt_offset;
2855 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2856 file_lock.fl_end = ~(u64)0;
2858 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2860 nfs4_transform_lock_offset(&file_lock);
2862 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2863 * since LOCKT doesn't require an OPEN, and therefore a struct
2864 * file may not exist, pass posix_test_lock a struct file with
2865 * only the dentry:inode set.
2867 memset(&file, 0, sizeof (struct file));
2868 file.f_dentry = current_fh->fh_dentry;
2871 conflicting_lock = posix_test_lock(&file, &file_lock);
2872 if (conflicting_lock) {
2873 status = nfserr_denied;
2874 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
2877 nfs4_unlock_state();
2882 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
2884 struct nfs4_stateid *stp;
2885 struct file *filp = NULL;
2886 struct file_lock file_lock;
2889 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2890 (long long) locku->lu_offset,
2891 (long long) locku->lu_length);
2893 if (check_lock_length(locku->lu_offset, locku->lu_length))
2894 return nfserr_inval;
2898 if ((status = nfs4_preprocess_seqid_op(current_fh,
2901 CHECK_FH | LOCK_STATE,
2902 &locku->lu_stateowner, &stp, NULL)))
2905 filp = stp->st_vfs_file;
2907 locks_init_lock(&file_lock);
2908 file_lock.fl_type = F_UNLCK;
2909 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2910 file_lock.fl_pid = current->tgid;
2911 file_lock.fl_file = filp;
2912 file_lock.fl_flags = FL_POSIX;
2913 file_lock.fl_start = locku->lu_offset;
2915 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2916 file_lock.fl_end = ~(u64)0;
2918 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2919 nfs4_transform_lock_offset(&file_lock);
2922 * Try to unlock the file in the VFS.
2924 status = posix_lock_file(filp, &file_lock);
2925 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2926 file_lock.fl_ops->fl_release_private(&file_lock);
2928 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2932 * OK, unlock succeeded; the only thing left to do is update the stateid.
2934 update_stateid(&stp->st_stateid);
2935 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2938 if (locku->lu_stateowner)
2939 nfs4_get_stateowner(locku->lu_stateowner);
2940 nfs4_unlock_state();
2944 status = nfserrno(status);
2950 * 1: locks held by lockowner
2951 * 0: no locks held by lockowner
2954 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
2956 struct file_lock **flpp;
2957 struct inode *inode = filp->f_dentry->d_inode;
2961 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
2962 if ((*flpp)->fl_owner == (fl_owner_t)lowner)
2972 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
2974 clientid_t *clid = &rlockowner->rl_clientid;
2975 struct nfs4_stateowner *local = NULL;
2976 struct xdr_netobj *owner = &rlockowner->rl_owner;
2979 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
2980 clid->cl_boot, clid->cl_id);
2982 /* XXX check for lease expiration */
2984 status = nfserr_stale_clientid;
2985 if (STALE_CLIENTID(clid)) {
2986 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
2993 local = find_lockstateowner(owner, clid);
2995 struct nfs4_stateid *stp;
2997 /* check for any locks held by any stateid
2998 * associated with the (lock) stateowner */
2999 status = nfserr_locks_held;
3000 list_for_each_entry(stp, &local->so_perfilestate,
3002 if (check_for_locks(stp->st_vfs_file, local))
3005 /* no locks held by (lock) stateowner */
3007 release_stateowner(local);
3010 nfs4_unlock_state();
3014 static inline struct nfs4_client_reclaim *
3015 alloc_reclaim(int namelen)
3017 struct nfs4_client_reclaim *crp = NULL;
3019 crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3022 crp->cr_name.data = kmalloc(namelen, GFP_KERNEL);
3023 if (!crp->cr_name.data) {
3031 * failure => all reset bets are off, nfserr_no_grace...
3034 nfs4_client_to_reclaim(char *name, int namlen)
3036 unsigned int strhashval;
3037 struct nfs4_client_reclaim *crp = NULL;
3039 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name);
3040 crp = alloc_reclaim(namlen);
3043 strhashval = clientstr_hashval(name, namlen);
3044 INIT_LIST_HEAD(&crp->cr_strhash);
3045 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3046 memcpy(crp->cr_name.data, name, namlen);
3047 crp->cr_name.len = namlen;
3048 reclaim_str_hashtbl_size++;
3053 nfs4_release_reclaim(void)
3055 struct nfs4_client_reclaim *crp = NULL;
3058 BUG_ON(!nfs4_reclaim_init);
3059 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3060 while (!list_empty(&reclaim_str_hashtbl[i])) {
3061 crp = list_entry(reclaim_str_hashtbl[i].next,
3062 struct nfs4_client_reclaim, cr_strhash);
3063 list_del(&crp->cr_strhash);
3064 kfree(crp->cr_name.data);
3066 reclaim_str_hashtbl_size--;
3069 BUG_ON(reclaim_str_hashtbl_size);
3073 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3074 struct nfs4_client_reclaim *
3075 nfs4_find_reclaim_client(clientid_t *clid)
3077 unsigned int strhashval;
3078 struct nfs4_client *clp;
3079 struct nfs4_client_reclaim *crp = NULL;
3082 /* find clientid in conf_id_hashtbl */
3083 clp = find_confirmed_client(clid);
3087 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
3088 clp->cl_name.len, clp->cl_name.data);
3090 /* find clp->cl_name in reclaim_str_hashtbl */
3091 strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len);
3092 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3093 if (cmp_name(&crp->cr_name, &clp->cl_name)) {
3101 * Called from OPEN. Look for clientid in reclaim list.
3104 nfs4_check_open_reclaim(clientid_t *clid)
3106 struct nfs4_client_reclaim *crp;
3108 if ((crp = nfs4_find_reclaim_client(clid)) == NULL)
3109 return nfserr_reclaim_bad;
3115 * Start and stop routines
3119 __nfs4_state_init(void)
3124 if (!nfs4_reclaim_init) {
3125 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3126 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3127 reclaim_str_hashtbl_size = 0;
3128 nfs4_reclaim_init = 1;
3130 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3131 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3132 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3133 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3134 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3136 for (i = 0; i < FILE_HASH_SIZE; i++) {
3137 INIT_LIST_HEAD(&file_hashtbl[i]);
3139 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3140 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3141 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3143 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3144 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3145 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3147 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3148 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3149 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3151 memset(&zerostateid, 0, sizeof(stateid_t));
3152 memset(&onestateid, ~0, sizeof(stateid_t));
3154 INIT_LIST_HEAD(&close_lru);
3155 INIT_LIST_HEAD(&client_lru);
3156 INIT_LIST_HEAD(&del_recall_lru);
3157 spin_lock_init(&recall_lock);
3158 boot_time = get_seconds();
3159 grace_time = max(old_lease_time, lease_time);
3160 if (reclaim_str_hashtbl_size == 0)
3163 printk("NFSD: starting %ld-second grace period\n", grace_time);
3164 grace_end = boot_time + grace_time;
3165 INIT_WORK(&laundromat_work,laundromat_main, NULL);
3166 schedule_delayed_work(&laundromat_work, NFSD_LEASE_TIME*HZ);
3170 nfs4_state_init(void)
3176 status = nfsd4_init_slabs();
3179 __nfs4_state_init();
3187 return get_seconds() < grace_end;
3193 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n");
3194 grace_end = get_seconds();
3198 nfs4_lease_time(void)
3204 __nfs4_state_shutdown(void)
3207 struct nfs4_client *clp = NULL;
3208 struct nfs4_delegation *dp = NULL;
3209 struct nfs4_stateowner *sop = NULL;
3210 struct list_head *pos, *next, reaplist;
3212 list_for_each_safe(pos, next, &close_lru) {
3213 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
3214 list_del(&sop->so_close_lru);
3215 nfs4_put_stateowner(sop);
3218 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3219 while (!list_empty(&conf_id_hashtbl[i])) {
3220 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3223 while (!list_empty(&unconf_str_hashtbl[i])) {
3224 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3228 INIT_LIST_HEAD(&reaplist);
3229 spin_lock(&recall_lock);
3230 list_for_each_safe(pos, next, &del_recall_lru) {
3231 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3232 list_move(&dp->dl_recall_lru, &reaplist);
3234 spin_unlock(&recall_lock);
3235 list_for_each_safe(pos, next, &reaplist) {
3236 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3237 list_del_init(&dp->dl_recall_lru);
3238 unhash_delegation(dp);
3241 release_all_files();
3242 cancel_delayed_work(&laundromat_work);
3243 flush_scheduled_work();
3245 dprintk("NFSD: list_add_perfile %d list_del_perfile %d\n",
3246 list_add_perfile, list_del_perfile);
3247 dprintk("NFSD: add_perclient %d del_perclient %d\n",
3248 add_perclient, del_perclient);
3249 dprintk("NFSD: alloc_file %d free_file %d\n",
3250 alloc_file, free_file);
3251 dprintk("NFSD: vfsopen %d vfsclose %d\n",
3253 dprintk("NFSD: alloc_delegation %d free_delegation %d\n",
3254 alloc_delegation, free_delegation);
3259 nfs4_state_shutdown(void)
3262 nfs4_release_reclaim();
3263 __nfs4_state_shutdown();
3265 nfs4_unlock_state();
3269 * Called when leasetime is changed.
3271 * if nfsd is not started, simply set the global lease.
3273 * if nfsd(s) are running, lease change requires nfsv4 state to be reset.
3274 * e.g: boot_time is reset, existing nfs4_client structs are
3275 * used to fill reclaim_str_hashtbl, then all state (except for the
3276 * reclaim_str_hashtbl) is re-initialized.
3278 * if the old lease time is greater than the new lease time, the grace
3279 * period needs to be set to the old lease time to allow clients to reclaim
3280 * their state. XXX - we may want to set the grace period == lease time
3281 * after an initial grace period == old lease time
3283 * if an error occurs in this process, the new lease is set, but the server
3284 * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace
3285 * which means OPEN/LOCK/READ/WRITE will fail during grace period.
3287 * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and
3288 * OPEN and LOCK reclaims.
3291 nfs4_reset_lease(time_t leasetime)
3293 struct nfs4_client *clp;
3296 printk("NFSD: New leasetime %ld\n",leasetime);
3300 old_lease_time = lease_time;
3301 lease_time = leasetime;
3303 nfs4_release_reclaim();
3305 /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */
3306 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3307 list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) {
3308 if (!nfs4_client_to_reclaim(clp->cl_name.data,
3309 clp->cl_name.len)) {
3310 nfs4_release_reclaim();
3316 __nfs4_state_shutdown();
3317 __nfs4_state_init();
3318 nfs4_unlock_state();