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;
58 static time_t grace_end = 0;
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 stateid_t zerostateid; /* bits all 0 */
65 stateid_t onestateid; /* bits all 1 */
67 /* forward declarations */
68 struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
69 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
70 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
75 * protects clientid_hashtbl[], clientstr_hashtbl[],
76 * unconfstr_hashtbl[], uncofid_hashtbl[].
78 static DECLARE_MUTEX(client_sema);
80 kmem_cache_t *stateowner_slab = NULL;
81 kmem_cache_t *file_slab = NULL;
82 kmem_cache_t *stateid_slab = NULL;
83 kmem_cache_t *deleg_slab = NULL;
92 nfs4_unlock_state(void)
98 opaque_hashval(const void *ptr, int nbytes)
100 unsigned char *cptr = (unsigned char *) ptr;
110 /* forward declarations */
111 static void release_stateowner(struct nfs4_stateowner *sop);
112 static void release_stateid(struct nfs4_stateid *stp, int flags);
118 /* recall_lock protects the del_recall_lru */
119 spinlock_t recall_lock = SPIN_LOCK_UNLOCKED;
120 static struct list_head del_recall_lru;
123 free_nfs4_file(struct kref *kref)
125 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
126 list_del(&fp->fi_hash);
128 kmem_cache_free(file_slab, fp);
132 put_nfs4_file(struct nfs4_file *fi)
134 kref_put(&fi->fi_ref, free_nfs4_file);
138 get_nfs4_file(struct nfs4_file *fi)
140 kref_get(&fi->fi_ref);
143 static struct nfs4_delegation *
144 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
146 struct nfs4_delegation *dp;
147 struct nfs4_file *fp = stp->st_file;
148 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
150 dprintk("NFSD alloc_init_deleg\n");
151 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
154 INIT_LIST_HEAD(&dp->dl_del_perfile);
155 INIT_LIST_HEAD(&dp->dl_del_perclnt);
156 INIT_LIST_HEAD(&dp->dl_recall_lru);
161 get_file(stp->st_vfs_file);
162 dp->dl_vfs_file = stp->st_vfs_file;
164 dp->dl_recall.cbr_dp = NULL;
165 dp->dl_recall.cbr_ident = cb->cb_ident;
166 dp->dl_recall.cbr_trunc = 0;
167 dp->dl_stateid.si_boot = boot_time;
168 dp->dl_stateid.si_stateownerid = current_delegid++;
169 dp->dl_stateid.si_fileid = 0;
170 dp->dl_stateid.si_generation = 0;
171 dp->dl_fhlen = current_fh->fh_handle.fh_size;
172 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
173 current_fh->fh_handle.fh_size);
175 atomic_set(&dp->dl_count, 1);
176 list_add(&dp->dl_del_perfile, &fp->fi_delegations);
177 list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
182 nfs4_put_delegation(struct nfs4_delegation *dp)
184 if (atomic_dec_and_test(&dp->dl_count)) {
185 dprintk("NFSD: freeing dp %p\n",dp);
186 put_nfs4_file(dp->dl_file);
187 kmem_cache_free(deleg_slab, dp);
191 /* Remove the associated file_lock first, then remove the delegation.
192 * lease_modify() is called to remove the FS_LEASE file_lock from
193 * the i_flock list, eventually calling nfsd's lock_manager
194 * fl_release_callback.
197 nfs4_close_delegation(struct nfs4_delegation *dp)
199 struct file *filp = dp->dl_vfs_file;
201 dprintk("NFSD: close_delegation dp %p\n",dp);
202 dp->dl_vfs_file = NULL;
203 /* The following nfsd_close may not actually close the file,
204 * but we want to remove the lease in any case. */
206 setlease(filp, F_UNLCK, &dp->dl_flock);
210 /* Called under the state lock. */
212 unhash_delegation(struct nfs4_delegation *dp)
214 list_del_init(&dp->dl_del_perfile);
215 list_del_init(&dp->dl_del_perclnt);
216 spin_lock(&recall_lock);
217 list_del_init(&dp->dl_recall_lru);
218 spin_unlock(&recall_lock);
219 nfs4_close_delegation(dp);
220 nfs4_put_delegation(dp);
227 /* Hash tables for nfs4_clientid state */
228 #define CLIENT_HASH_BITS 4
229 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
230 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
232 #define clientid_hashval(id) \
233 ((id) & CLIENT_HASH_MASK)
234 #define clientstr_hashval(name) \
235 (opaque_hashval((name), 8) & CLIENT_HASH_MASK)
237 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
238 * used in reboot/reset lease grace period processing
240 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
241 * setclientid_confirmed info.
243 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
246 * client_lru holds client queue ordered by nfs4_client.cl_time
249 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
250 * for last close replay.
252 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
253 static int reclaim_str_hashtbl_size = 0;
254 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
255 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
256 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
257 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
258 static struct list_head client_lru;
259 static struct list_head close_lru;
262 renew_client(struct nfs4_client *clp)
265 * Move client to the end to the LRU list.
267 dprintk("renewing client (clientid %08x/%08x)\n",
268 clp->cl_clientid.cl_boot,
269 clp->cl_clientid.cl_id);
270 list_move_tail(&clp->cl_lru, &client_lru);
271 clp->cl_time = get_seconds();
274 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
276 STALE_CLIENTID(clientid_t *clid)
278 if (clid->cl_boot == boot_time)
280 dprintk("NFSD stale clientid (%08x/%08x)\n",
281 clid->cl_boot, clid->cl_id);
286 * XXX Should we use a slab cache ?
287 * This type of memory management is somewhat inefficient, but we use it
288 * anyway since SETCLIENTID is not a common operation.
290 static inline struct nfs4_client *
291 alloc_client(struct xdr_netobj name)
293 struct nfs4_client *clp;
295 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
296 memset(clp, 0, sizeof(*clp));
297 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
298 memcpy(clp->cl_name.data, name.data, name.len);
299 clp->cl_name.len = name.len;
310 free_client(struct nfs4_client *clp)
312 if (clp->cl_cred.cr_group_info)
313 put_group_info(clp->cl_cred.cr_group_info);
314 kfree(clp->cl_name.data);
319 put_nfs4_client(struct nfs4_client *clp)
321 if (atomic_dec_and_test(&clp->cl_count))
326 expire_client(struct nfs4_client *clp)
328 struct nfs4_stateowner *sop;
329 struct nfs4_delegation *dp;
330 struct nfs4_callback *cb = &clp->cl_callback;
331 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
332 struct list_head reaplist;
334 dprintk("NFSD: expire_client cl_count %d\n",
335 atomic_read(&clp->cl_count));
337 /* shutdown rpc client, ending any outstanding recall rpcs */
338 if (atomic_read(&cb->cb_set) == 1 && clnt) {
339 rpc_shutdown_client(clnt);
340 clnt = clp->cl_callback.cb_client = NULL;
343 INIT_LIST_HEAD(&reaplist);
344 spin_lock(&recall_lock);
345 while (!list_empty(&clp->cl_del_perclnt)) {
346 dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt);
347 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
349 list_del_init(&dp->dl_del_perclnt);
350 list_move(&dp->dl_recall_lru, &reaplist);
352 spin_unlock(&recall_lock);
353 while (!list_empty(&reaplist)) {
354 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
355 list_del_init(&dp->dl_recall_lru);
356 unhash_delegation(dp);
358 list_del(&clp->cl_idhash);
359 list_del(&clp->cl_strhash);
360 list_del(&clp->cl_lru);
361 while (!list_empty(&clp->cl_perclient)) {
362 sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
363 release_stateowner(sop);
365 put_nfs4_client(clp);
368 static struct nfs4_client *
369 create_client(struct xdr_netobj name, char *recdir) {
370 struct nfs4_client *clp;
372 if (!(clp = alloc_client(name)))
374 memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
375 atomic_set(&clp->cl_count, 1);
376 atomic_set(&clp->cl_callback.cb_set, 0);
377 clp->cl_callback.cb_parsed = 0;
378 INIT_LIST_HEAD(&clp->cl_idhash);
379 INIT_LIST_HEAD(&clp->cl_strhash);
380 INIT_LIST_HEAD(&clp->cl_perclient);
381 INIT_LIST_HEAD(&clp->cl_del_perclnt);
382 INIT_LIST_HEAD(&clp->cl_lru);
388 copy_verf(struct nfs4_client *target, nfs4_verifier *source) {
389 memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data));
393 copy_clid(struct nfs4_client *target, struct nfs4_client *source) {
394 target->cl_clientid.cl_boot = source->cl_clientid.cl_boot;
395 target->cl_clientid.cl_id = source->cl_clientid.cl_id;
399 copy_cred(struct svc_cred *target, struct svc_cred *source) {
401 target->cr_uid = source->cr_uid;
402 target->cr_gid = source->cr_gid;
403 target->cr_group_info = source->cr_group_info;
404 get_group_info(target->cr_group_info);
408 same_name(const char *n1, const char *n2) {
409 return 0 == memcmp(n1, n2, HEXDIR_LEN);
413 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
414 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
418 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
419 return((cl1->cl_boot == cl2->cl_boot) &&
420 (cl1->cl_id == cl2->cl_id));
423 /* XXX what about NGROUP */
425 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
426 return(cr1->cr_uid == cr2->cr_uid);
431 gen_clid(struct nfs4_client *clp) {
432 clp->cl_clientid.cl_boot = boot_time;
433 clp->cl_clientid.cl_id = current_clientid++;
437 gen_confirm(struct nfs4_client *clp) {
442 p = (u32 *)clp->cl_confirm.data;
448 check_name(struct xdr_netobj name) {
452 if (name.len > NFS4_OPAQUE_LIMIT) {
453 printk("NFSD: check_name: name too long(%d)!\n", name.len);
460 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
462 unsigned int idhashval;
464 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
465 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
466 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
467 list_add_tail(&clp->cl_lru, &client_lru);
468 clp->cl_time = get_seconds();
472 move_to_confirmed(struct nfs4_client *clp)
474 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
475 unsigned int strhashval;
477 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
478 list_del_init(&clp->cl_strhash);
479 list_del_init(&clp->cl_idhash);
480 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
481 strhashval = clientstr_hashval(clp->cl_recdir);
482 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
486 static struct nfs4_client *
487 find_confirmed_client(clientid_t *clid)
489 struct nfs4_client *clp;
490 unsigned int idhashval = clientid_hashval(clid->cl_id);
492 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
493 if (cmp_clid(&clp->cl_clientid, clid))
499 static struct nfs4_client *
500 find_unconfirmed_client(clientid_t *clid)
502 struct nfs4_client *clp;
503 unsigned int idhashval = clientid_hashval(clid->cl_id);
505 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
506 if (cmp_clid(&clp->cl_clientid, clid))
512 /* a helper function for parse_callback */
514 parse_octet(unsigned int *lenp, char **addrp)
516 unsigned int len = *lenp;
528 if ((c < '0') || (c > '9')) {
534 n = (n * 10) + (c - '0');
545 /* parse and set the setclientid ipv4 callback address */
547 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
552 u32 addrlen = addr_len;
553 char *addr = addr_val;
558 for(i = 4; i > 0 ; i--) {
559 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
562 cbaddr |= (temp << shift);
570 for(i = 2; i > 0 ; i--) {
571 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
574 cbport |= (temp << shift);
583 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
585 struct nfs4_callback *cb = &clp->cl_callback;
587 /* Currently, we only support tcp for the callback channel */
588 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
591 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
592 &cb->cb_addr, &cb->cb_port)))
594 cb->cb_prog = se->se_callback_prog;
595 cb->cb_ident = se->se_callback_ident;
599 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
600 "will not receive delegations\n",
601 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
608 * RFC 3010 has a complex implmentation description of processing a
609 * SETCLIENTID request consisting of 5 bullets, labeled as
610 * CASE0 - CASE4 below.
613 * callback information will be processed in a future patch
615 * an unconfirmed record is added when:
616 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
617 * CASE 1: confirmed record found with matching name, principal,
618 * verifier, and clientid.
619 * CASE 2: confirmed record found with matching name, principal,
620 * and there is no unconfirmed record with matching
623 * an unconfirmed record is replaced when:
624 * CASE 3: confirmed record found with matching name, principal,
625 * and an unconfirmed record is found with matching
626 * name, principal, and with clientid and
627 * confirm that does not match the confirmed record.
628 * CASE 4: there is no confirmed record with matching name and
629 * principal. there is an unconfirmed record with
630 * matching name, principal.
632 * an unconfirmed record is deleted when:
633 * CASE 1: an unconfirmed record that matches input name, verifier,
634 * and confirmed clientid.
635 * CASE 4: any unconfirmed records with matching name and principal
636 * that exist after an unconfirmed record has been replaced
637 * as described above.
641 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
643 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
644 struct xdr_netobj clname = {
645 .len = setclid->se_namelen,
646 .data = setclid->se_name,
648 nfs4_verifier clverifier = setclid->se_verf;
649 unsigned int strhashval;
650 struct nfs4_client * conf, * unconf, * new, * clp;
652 char dname[HEXDIR_LEN];
654 status = nfserr_inval;
655 if (!check_name(clname))
658 status = nfs4_make_rec_clidname(dname, &clname);
663 * XXX The Duplicate Request Cache (DRC) has been checked (??)
664 * We get here on a DRC miss.
667 strhashval = clientstr_hashval(dname);
671 list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) {
672 if (!same_name(clp->cl_recdir, dname))
676 * clname match, confirmed, different principal
677 * or different ip_address
679 status = nfserr_clid_inuse;
680 if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)
681 || clp->cl_addr != ip_addr) {
682 printk("NFSD: setclientid: string in use by client"
683 "(clientid %08x/%08x)\n",
684 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
691 list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) {
692 if (!same_name(clp->cl_recdir, dname))
694 /* cl_name match from a previous SETCLIENTID operation */
698 status = nfserr_resource;
702 * placed first, because it is the normal case.
705 expire_client(unconf);
706 new = create_client(clname, dname);
709 copy_verf(new, &clverifier);
710 new->cl_addr = ip_addr;
711 copy_cred(&new->cl_cred,&rqstp->rq_cred);
714 gen_callback(new, setclid);
715 add_to_unconfirmed(new, strhashval);
716 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
719 * cl_name match, confirmed, principal match
720 * verifier match: probable callback update
722 * remove any unconfirmed nfs4_client with
723 * matching cl_name, cl_verifier, and cl_clientid
725 * create and insert an unconfirmed nfs4_client with same
726 * cl_name, cl_verifier, and cl_clientid as existing
727 * nfs4_client, but with the new callback info and a
731 cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) &&
732 cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) {
733 expire_client(unconf);
735 new = create_client(clname, dname);
738 copy_verf(new,&conf->cl_verifier);
739 new->cl_addr = ip_addr;
740 copy_cred(&new->cl_cred,&rqstp->rq_cred);
741 copy_clid(new, conf);
743 gen_callback(new, setclid);
744 add_to_unconfirmed(new,strhashval);
745 } else if (!unconf) {
748 * clname match, confirmed, principal match
749 * verfier does not match
750 * no unconfirmed. create a new unconfirmed nfs4_client
751 * using input clverifier, clname, and callback info
752 * and generate a new cl_clientid and cl_confirm.
754 new = create_client(clname, dname);
757 copy_verf(new,&clverifier);
758 new->cl_addr = ip_addr;
759 copy_cred(&new->cl_cred,&rqstp->rq_cred);
762 gen_callback(new, setclid);
763 add_to_unconfirmed(new, strhashval);
764 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
767 * confirmed found (name, principal match)
768 * confirmed verifier does not match input clverifier
770 * unconfirmed found (name match)
771 * confirmed->cl_confirm != unconfirmed->cl_confirm
773 * remove unconfirmed.
775 * create an unconfirmed nfs4_client
776 * with same cl_name as existing confirmed nfs4_client,
777 * but with new callback info, new cl_clientid,
778 * new cl_verifier and a new cl_confirm
780 expire_client(unconf);
781 new = create_client(clname, dname);
784 copy_verf(new,&clverifier);
785 new->cl_addr = ip_addr;
786 copy_cred(&new->cl_cred,&rqstp->rq_cred);
789 gen_callback(new, setclid);
790 add_to_unconfirmed(new, strhashval);
792 /* No cases hit !!! */
793 status = nfserr_inval;
797 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
798 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
799 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
808 * RFC 3010 has a complex implmentation description of processing a
809 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
810 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
812 * NOTE: callback information will be processed here in a future patch
815 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
817 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
818 struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
819 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
820 clientid_t * clid = &setclientid_confirm->sc_clientid;
823 if (STALE_CLIENTID(clid))
824 return nfserr_stale_clientid;
826 * XXX The Duplicate Request Cache (DRC) has been checked (??)
827 * We get here on a DRC miss.
831 clp = find_confirmed_client(clid);
833 status = nfserr_inval;
835 * Found a record for this clientid. If the IP addresses
836 * don't match, return ERR_INVAL just as if the record had
839 if (clp->cl_addr != ip_addr) {
840 printk("NFSD: setclientid: string in use by client"
841 "(clientid %08x/%08x)\n",
842 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
847 clp = find_unconfirmed_client(clid);
849 status = nfserr_inval;
850 if (clp->cl_addr != ip_addr) {
851 printk("NFSD: setclientid: string in use by client"
852 "(clientid %08x/%08x)\n",
853 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
859 * unconf record that matches input clientid and input confirm.
860 * conf record that matches input clientid.
861 * conf and unconf records match names, verifiers
863 if ((conf && unconf) &&
864 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
865 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
866 (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
867 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
868 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
869 status = nfserr_clid_inuse;
873 move_to_confirmed(unconf);
879 * conf record that matches input clientid.
880 * if unconf record that matches input clientid, then unconf->cl_name
881 * or unconf->cl_verifier don't match the conf record.
883 if ((conf && !unconf) ||
885 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
886 !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
887 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
888 status = nfserr_clid_inuse;
896 * conf record not found.
897 * unconf record found.
898 * unconf->cl_confirm matches input confirm
900 if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) {
901 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
902 status = nfserr_clid_inuse;
906 move_to_confirmed(unconf);
911 * conf record not found, or if conf, then conf->cl_confirm does not
912 * match input confirm.
913 * unconf record not found, or if unconf, then unconf->cl_confirm
914 * does not match input confirm.
916 if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) &&
917 (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) {
918 status = nfserr_stale_clientid;
921 /* check that we have hit one of the cases...*/
922 status = nfserr_inval;
926 nfsd4_probe_callback(clp);
932 * Open owner state (share locks)
935 /* hash tables for nfs4_stateowner */
936 #define OWNER_HASH_BITS 8
937 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
938 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
940 #define ownerid_hashval(id) \
941 ((id) & OWNER_HASH_MASK)
942 #define ownerstr_hashval(clientid, ownername) \
943 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
945 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
946 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
948 /* hash table for nfs4_file */
949 #define FILE_HASH_BITS 8
950 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
951 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
952 /* hash table for (open)nfs4_stateid */
953 #define STATEID_HASH_BITS 10
954 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
955 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
957 #define file_hashval(x) \
958 hash_ptr(x, FILE_HASH_BITS)
959 #define stateid_hashval(owner_id, file_id) \
960 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
962 static struct list_head file_hashtbl[FILE_HASH_SIZE];
963 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
965 /* OPEN Share state helper functions */
966 static inline struct nfs4_file *
967 alloc_init_file(struct inode *ino)
969 struct nfs4_file *fp;
970 unsigned int hashval = file_hashval(ino);
972 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
974 kref_init(&fp->fi_ref);
975 INIT_LIST_HEAD(&fp->fi_hash);
976 INIT_LIST_HEAD(&fp->fi_stateids);
977 INIT_LIST_HEAD(&fp->fi_delegations);
978 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
979 fp->fi_inode = igrab(ino);
980 fp->fi_id = current_fileid++;
987 nfsd4_free_slab(kmem_cache_t **slab)
993 status = kmem_cache_destroy(*slab);
999 nfsd4_free_slabs(void)
1001 nfsd4_free_slab(&stateowner_slab);
1002 nfsd4_free_slab(&file_slab);
1003 nfsd4_free_slab(&stateid_slab);
1004 nfsd4_free_slab(&deleg_slab);
1008 nfsd4_init_slabs(void)
1010 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1011 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1012 if (stateowner_slab == NULL)
1014 file_slab = kmem_cache_create("nfsd4_files",
1015 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1016 if (file_slab == NULL)
1018 stateid_slab = kmem_cache_create("nfsd4_stateids",
1019 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1020 if (stateid_slab == NULL)
1022 deleg_slab = kmem_cache_create("nfsd4_delegations",
1023 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1024 if (deleg_slab == NULL)
1029 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1034 nfs4_free_stateowner(struct kref *kref)
1036 struct nfs4_stateowner *sop =
1037 container_of(kref, struct nfs4_stateowner, so_ref);
1038 kfree(sop->so_owner.data);
1039 kmem_cache_free(stateowner_slab, sop);
1042 static inline struct nfs4_stateowner *
1043 alloc_stateowner(struct xdr_netobj *owner)
1045 struct nfs4_stateowner *sop;
1047 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1048 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1049 memcpy(sop->so_owner.data, owner->data, owner->len);
1050 sop->so_owner.len = owner->len;
1051 kref_init(&sop->so_ref);
1054 kmem_cache_free(stateowner_slab, sop);
1059 static struct nfs4_stateowner *
1060 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1061 struct nfs4_stateowner *sop;
1062 struct nfs4_replay *rp;
1063 unsigned int idhashval;
1065 if (!(sop = alloc_stateowner(&open->op_owner)))
1067 idhashval = ownerid_hashval(current_ownerid);
1068 INIT_LIST_HEAD(&sop->so_idhash);
1069 INIT_LIST_HEAD(&sop->so_strhash);
1070 INIT_LIST_HEAD(&sop->so_perclient);
1071 INIT_LIST_HEAD(&sop->so_perfilestate);
1072 INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */
1073 INIT_LIST_HEAD(&sop->so_close_lru);
1075 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1076 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1077 list_add(&sop->so_perclient, &clp->cl_perclient);
1078 sop->so_is_open_owner = 1;
1079 sop->so_id = current_ownerid++;
1080 sop->so_client = clp;
1081 sop->so_seqid = open->op_seqid;
1082 sop->so_confirmed = 0;
1083 rp = &sop->so_replay;
1084 rp->rp_status = NFSERR_SERVERFAULT;
1086 rp->rp_buf = rp->rp_ibuf;
1091 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1093 struct nfs4_stateowner *lock_sop;
1095 while (!list_empty(&open_stp->st_perlockowner)) {
1096 lock_sop = list_entry(open_stp->st_perlockowner.next,
1097 struct nfs4_stateowner, so_perlockowner);
1098 /* list_del(&open_stp->st_perlockowner); */
1099 BUG_ON(lock_sop->so_is_open_owner);
1100 release_stateowner(lock_sop);
1105 unhash_stateowner(struct nfs4_stateowner *sop)
1107 struct nfs4_stateid *stp;
1109 list_del(&sop->so_idhash);
1110 list_del(&sop->so_strhash);
1111 if (sop->so_is_open_owner)
1112 list_del(&sop->so_perclient);
1113 list_del(&sop->so_perlockowner);
1114 while (!list_empty(&sop->so_perfilestate)) {
1115 stp = list_entry(sop->so_perfilestate.next,
1116 struct nfs4_stateid, st_perfilestate);
1117 if (sop->so_is_open_owner)
1118 release_stateid(stp, OPEN_STATE);
1120 release_stateid(stp, LOCK_STATE);
1125 release_stateowner(struct nfs4_stateowner *sop)
1127 unhash_stateowner(sop);
1128 list_del(&sop->so_close_lru);
1129 nfs4_put_stateowner(sop);
1133 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1134 struct nfs4_stateowner *sop = open->op_stateowner;
1135 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1137 INIT_LIST_HEAD(&stp->st_hash);
1138 INIT_LIST_HEAD(&stp->st_perfilestate);
1139 INIT_LIST_HEAD(&stp->st_perlockowner);
1140 INIT_LIST_HEAD(&stp->st_perfile);
1141 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1142 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
1143 list_add(&stp->st_perfile, &fp->fi_stateids);
1144 stp->st_stateowner = sop;
1147 stp->st_stateid.si_boot = boot_time;
1148 stp->st_stateid.si_stateownerid = sop->so_id;
1149 stp->st_stateid.si_fileid = fp->fi_id;
1150 stp->st_stateid.si_generation = 0;
1151 stp->st_access_bmap = 0;
1152 stp->st_deny_bmap = 0;
1153 __set_bit(open->op_share_access, &stp->st_access_bmap);
1154 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1158 release_stateid(struct nfs4_stateid *stp, int flags)
1160 struct file *filp = stp->st_vfs_file;
1162 list_del(&stp->st_hash);
1163 list_del(&stp->st_perfile);
1164 list_del(&stp->st_perfilestate);
1165 if (flags & OPEN_STATE) {
1166 release_stateid_lockowners(stp);
1167 stp->st_vfs_file = NULL;
1169 } else if (flags & LOCK_STATE)
1170 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1171 put_nfs4_file(stp->st_file);
1172 kmem_cache_free(stateid_slab, stp);
1177 move_to_close_lru(struct nfs4_stateowner *sop)
1179 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1181 unhash_stateowner(sop);
1182 list_add_tail(&sop->so_close_lru, &close_lru);
1183 sop->so_time = get_seconds();
1187 release_state_owner(struct nfs4_stateid *stp, int flag)
1189 struct nfs4_stateowner *sop = stp->st_stateowner;
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);
1203 cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) {
1204 return ((sop->so_owner.len == owner->len) &&
1205 !memcmp(sop->so_owner.data, owner->data, owner->len) &&
1206 (sop->so_client->cl_clientid.cl_id == clid->cl_id));
1209 static struct nfs4_stateowner *
1210 find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open)
1212 struct nfs4_stateowner *so = NULL;
1214 list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {
1215 if (cmp_owner_str(so, &open->op_owner, &open->op_clientid))
1221 /* search file_hashtbl[] for file */
1222 static struct nfs4_file *
1223 find_file(struct inode *ino)
1225 unsigned int hashval = file_hashval(ino);
1226 struct nfs4_file *fp;
1228 list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
1229 if (fp->fi_inode == ino) {
1237 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1238 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1241 set_access(unsigned int *access, unsigned long bmap) {
1245 for (i = 1; i < 4; i++) {
1246 if (test_bit(i, &bmap))
1252 set_deny(unsigned int *deny, unsigned long bmap) {
1256 for (i = 0; i < 4; i++) {
1257 if (test_bit(i, &bmap))
1263 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1264 unsigned int access, deny;
1266 set_access(&access, stp->st_access_bmap);
1267 set_deny(&deny, stp->st_deny_bmap);
1268 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1274 * Called to check deny when READ with all zero stateid or
1275 * WRITE with all zero or all one stateid
1278 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1280 struct inode *ino = current_fh->fh_dentry->d_inode;
1281 struct nfs4_file *fp;
1282 struct nfs4_stateid *stp;
1285 dprintk("NFSD: nfs4_share_conflict\n");
1287 fp = find_file(ino);
1290 ret = nfserr_share_denied;
1291 /* Search for conflicting share reservations */
1292 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1293 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1294 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1304 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1306 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1307 put_write_access(filp->f_dentry->d_inode);
1308 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1313 * Recall a delegation
1316 do_recall(void *__dp)
1318 struct nfs4_delegation *dp = __dp;
1320 daemonize("nfsv4-recall");
1322 nfsd4_cb_recall(dp);
1327 * Spawn a thread to perform a recall on the delegation represented
1328 * by the lease (file_lock)
1330 * Called from break_lease() with lock_kernel() held.
1331 * Note: we assume break_lease will only call this *once* for any given
1335 void nfsd_break_deleg_cb(struct file_lock *fl)
1337 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1338 struct task_struct *t;
1340 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1344 /* We're assuming the state code never drops its reference
1345 * without first removing the lease. Since we're in this lease
1346 * callback (and since the lease code is serialized by the kernel
1347 * lock) we know the server hasn't removed the lease yet, we know
1348 * it's safe to take a reference: */
1349 atomic_inc(&dp->dl_count);
1351 spin_lock(&recall_lock);
1352 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1353 spin_unlock(&recall_lock);
1355 /* only place dl_time is set. protected by lock_kernel*/
1356 dp->dl_time = get_seconds();
1358 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1359 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1361 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1363 struct nfs4_client *clp = dp->dl_client;
1365 printk(KERN_INFO "NFSD: Callback thread failed for "
1366 "for client (clientid %08x/%08x)\n",
1367 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1368 nfs4_put_delegation(dp);
1373 * The file_lock is being reapd.
1375 * Called by locks_free_lock() with lock_kernel() held.
1378 void nfsd_release_deleg_cb(struct file_lock *fl)
1380 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1382 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1384 if (!(fl->fl_flags & FL_LEASE) || !dp)
1386 dp->dl_flock = NULL;
1390 * Set the delegation file_lock back pointer.
1392 * Called from __setlease() with lock_kernel() held.
1395 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1397 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1399 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1406 * Called from __setlease() with lock_kernel() held
1409 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1411 struct nfs4_delegation *onlistd =
1412 (struct nfs4_delegation *)onlist->fl_owner;
1413 struct nfs4_delegation *tryd =
1414 (struct nfs4_delegation *)try->fl_owner;
1416 if (onlist->fl_lmops != try->fl_lmops)
1419 return onlistd->dl_client == tryd->dl_client;
1424 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1427 return lease_modify(onlist, arg);
1432 struct lock_manager_operations nfsd_lease_mng_ops = {
1433 .fl_break = nfsd_break_deleg_cb,
1434 .fl_release_private = nfsd_release_deleg_cb,
1435 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1436 .fl_mylease = nfsd_same_client_deleg_cb,
1437 .fl_change = nfsd_change_deleg_cb,
1442 * nfsd4_process_open1()
1443 * lookup stateowner.
1455 * called with nfs4_lock_state() held.
1458 nfsd4_process_open1(struct nfsd4_open *open)
1461 clientid_t *clientid = &open->op_clientid;
1462 struct nfs4_client *clp = NULL;
1463 unsigned int strhashval;
1464 struct nfs4_stateowner *sop = NULL;
1466 status = nfserr_inval;
1467 if (!check_name(open->op_owner))
1470 if (STALE_CLIENTID(&open->op_clientid))
1471 return nfserr_stale_clientid;
1473 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1474 sop = find_openstateowner_str(strhashval, open);
1476 open->op_stateowner = sop;
1477 /* check for replay */
1478 if (open->op_seqid == sop->so_seqid){
1479 if (sop->so_replay.rp_buflen)
1480 return NFSERR_REPLAY_ME;
1482 /* The original OPEN failed so spectacularly
1483 * that we don't even have replay data saved!
1484 * Therefore, we have no choice but to continue
1485 * processing this OPEN; presumably, we'll
1486 * fail again for the same reason.
1488 dprintk("nfsd4_process_open1:"
1489 " replay with no replay cache\n");
1492 } else if (sop->so_confirmed) {
1493 if (open->op_seqid == sop->so_seqid + 1)
1495 status = nfserr_bad_seqid;
1498 /* If we get here, we received an OPEN for an
1499 * unconfirmed nfs4_stateowner. Since the seqid's are
1500 * different, purge the existing nfs4_stateowner, and
1501 * instantiate a new one.
1503 clp = sop->so_client;
1504 release_stateowner(sop);
1507 /* nfs4_stateowner not found.
1508 * Verify clientid and instantiate new nfs4_stateowner.
1509 * If verify fails this is presumably the result of the
1510 * client's lease expiring.
1512 status = nfserr_expired;
1513 clp = find_confirmed_client(clientid);
1517 status = nfserr_resource;
1518 sop = alloc_init_open_stateowner(strhashval, clp, open);
1521 open->op_stateowner = sop;
1524 renew_client(sop->so_client);
1526 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1527 status = nfserr_reclaim_bad;
1532 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1534 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1535 return nfserr_openmode;
1540 static struct nfs4_delegation *
1541 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1543 struct nfs4_delegation *dp;
1545 list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) {
1546 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1553 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1554 struct nfs4_delegation **dp)
1557 int status = nfserr_bad_stateid;
1559 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1562 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1563 RD_STATE : WR_STATE;
1564 status = nfs4_check_delegmode(*dp, flags);
1568 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1572 open->op_stateowner->so_confirmed = 1;
1577 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1579 struct nfs4_stateid *local;
1580 int status = nfserr_share_denied;
1581 struct nfs4_stateowner *sop = open->op_stateowner;
1583 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1584 /* ignore lock owners */
1585 if (local->st_stateowner->so_is_open_owner == 0)
1587 /* remember if we have seen this open owner */
1588 if (local->st_stateowner == sop)
1590 /* check for conflicting share reservations */
1591 if (!test_share(local, open))
1599 static inline struct nfs4_stateid *
1600 nfs4_alloc_stateid(void)
1602 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1606 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1607 struct nfs4_delegation *dp,
1608 struct svc_fh *cur_fh, int flags)
1610 struct nfs4_stateid *stp;
1612 stp = nfs4_alloc_stateid();
1614 return nfserr_resource;
1617 get_file(dp->dl_vfs_file);
1618 stp->st_vfs_file = dp->dl_vfs_file;
1621 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1624 if (status == nfserr_dropit)
1625 status = nfserr_jukebox;
1626 kmem_cache_free(stateid_slab, stp);
1635 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1636 struct nfsd4_open *open)
1638 struct iattr iattr = {
1639 .ia_valid = ATTR_SIZE,
1642 if (!open->op_truncate)
1644 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1646 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1650 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1652 struct file *filp = stp->st_vfs_file;
1653 struct inode *inode = filp->f_dentry->d_inode;
1654 unsigned int share_access;
1657 set_access(&share_access, stp->st_access_bmap);
1658 share_access = ~share_access;
1659 share_access &= open->op_share_access;
1661 if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
1662 return nfsd4_truncate(rqstp, cur_fh, open);
1664 status = get_write_access(inode);
1666 return nfserrno(status);
1667 status = nfsd4_truncate(rqstp, cur_fh, open);
1669 put_write_access(inode);
1672 /* remember the open */
1673 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
1674 set_bit(open->op_share_access, &stp->st_access_bmap);
1675 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1681 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1683 nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
1685 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
1687 *status = nfserr_reclaim_bad;
1689 open->op_stateowner->so_confirmed = 1;
1690 open->op_stateowner->so_seqid--;
1696 * Attempt to hand out a delegation.
1699 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1701 struct nfs4_delegation *dp;
1702 struct nfs4_stateowner *sop = stp->st_stateowner;
1703 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1704 struct file_lock fl, *flp = &fl;
1705 int status, flag = 0;
1707 flag = NFS4_OPEN_DELEGATE_NONE;
1708 open->op_recall = 0;
1709 switch (open->op_claim_type) {
1710 case NFS4_OPEN_CLAIM_PREVIOUS:
1711 if (!atomic_read(&cb->cb_set))
1712 open->op_recall = 1;
1713 flag = open->op_delegate_type;
1714 if (flag == NFS4_OPEN_DELEGATE_NONE)
1717 case NFS4_OPEN_CLAIM_NULL:
1718 /* Let's not give out any delegations till everyone's
1719 * had the chance to reclaim theirs.... */
1720 if (nfs4_in_grace())
1722 if (!atomic_read(&cb->cb_set) || !sop->so_confirmed)
1724 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1725 flag = NFS4_OPEN_DELEGATE_WRITE;
1727 flag = NFS4_OPEN_DELEGATE_READ;
1733 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1735 flag = NFS4_OPEN_DELEGATE_NONE;
1738 locks_init_lock(&fl);
1739 fl.fl_lmops = &nfsd_lease_mng_ops;
1740 fl.fl_flags = FL_LEASE;
1741 fl.fl_end = OFFSET_MAX;
1742 fl.fl_owner = (fl_owner_t)dp;
1743 fl.fl_file = stp->st_vfs_file;
1744 fl.fl_pid = current->tgid;
1746 /* setlease checks to see if delegation should be handed out.
1747 * the lock_manager callbacks fl_mylease and fl_change are used
1749 if ((status = setlease(stp->st_vfs_file,
1750 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1751 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1752 unhash_delegation(dp);
1753 flag = NFS4_OPEN_DELEGATE_NONE;
1757 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1759 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1760 dp->dl_stateid.si_boot,
1761 dp->dl_stateid.si_stateownerid,
1762 dp->dl_stateid.si_fileid,
1763 dp->dl_stateid.si_generation);
1765 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS
1766 && flag == NFS4_OPEN_DELEGATE_NONE
1767 && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE)
1768 printk("NFSD: WARNING: refusing delegation reclaim\n");
1769 open->op_delegate_type = flag;
1773 * called with nfs4_lock_state() held.
1776 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1778 struct nfs4_file *fp = NULL;
1779 struct inode *ino = current_fh->fh_dentry->d_inode;
1780 struct nfs4_stateid *stp = NULL;
1781 struct nfs4_delegation *dp = NULL;
1784 status = nfserr_inval;
1785 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
1788 * Lookup file; if found, lookup stateid and check open request,
1789 * and check for delegations in the process of being recalled.
1790 * If not found, create the nfs4_file struct
1792 fp = find_file(ino);
1794 if ((status = nfs4_check_open(fp, open, &stp)))
1796 status = nfs4_check_deleg(fp, open, &dp);
1800 status = nfserr_bad_stateid;
1801 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1803 status = nfserr_resource;
1804 fp = alloc_init_file(ino);
1810 * OPEN the file, or upgrade an existing OPEN.
1811 * If truncate fails, the OPEN fails.
1814 /* Stateid was found, this is an OPEN upgrade */
1815 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1819 /* Stateid was not found, this is a new OPEN */
1821 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1825 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1828 init_stateid(stp, fp, open);
1829 status = nfsd4_truncate(rqstp, current_fh, open);
1831 release_stateid(stp, OPEN_STATE);
1835 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1838 * Attempt to hand out a delegation. No error return, because the
1839 * OPEN succeeds even if we fail.
1841 nfs4_open_delegation(current_fh, open, stp);
1845 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1846 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1847 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1851 /* CLAIM_PREVIOUS has different error returns */
1852 nfs4_set_claim_prev(open, &status);
1854 * To finish the open response, we just need to set the rflags.
1856 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1857 if (!open->op_stateowner->so_confirmed)
1858 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1863 static struct workqueue_struct *laundry_wq;
1864 static struct work_struct laundromat_work;
1865 static void laundromat_main(void *);
1866 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1869 nfsd4_renew(clientid_t *clid)
1871 struct nfs4_client *clp;
1875 dprintk("process_renew(%08x/%08x): starting\n",
1876 clid->cl_boot, clid->cl_id);
1877 status = nfserr_stale_clientid;
1878 if (STALE_CLIENTID(clid))
1880 clp = find_confirmed_client(clid);
1881 status = nfserr_expired;
1883 /* We assume the client took too long to RENEW. */
1884 dprintk("nfsd4_renew: clientid not found!\n");
1888 status = nfserr_cb_path_down;
1889 if (!list_empty(&clp->cl_del_perclnt)
1890 && !atomic_read(&clp->cl_callback.cb_set))
1894 nfs4_unlock_state();
1899 nfs4_laundromat(void)
1901 struct nfs4_client *clp;
1902 struct nfs4_stateowner *sop;
1903 struct nfs4_delegation *dp;
1904 struct list_head *pos, *next, reaplist;
1905 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1906 time_t t, clientid_val = NFSD_LEASE_TIME;
1907 time_t u, test_val = NFSD_LEASE_TIME;
1911 dprintk("NFSD: laundromat service - starting\n");
1912 list_for_each_safe(pos, next, &client_lru) {
1913 clp = list_entry(pos, struct nfs4_client, cl_lru);
1914 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1915 t = clp->cl_time - cutoff;
1916 if (clientid_val > t)
1920 dprintk("NFSD: purging unused client (clientid %08x)\n",
1921 clp->cl_clientid.cl_id);
1924 INIT_LIST_HEAD(&reaplist);
1925 spin_lock(&recall_lock);
1926 list_for_each_safe(pos, next, &del_recall_lru) {
1927 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1928 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1929 u = dp->dl_time - cutoff;
1934 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1936 list_move(&dp->dl_recall_lru, &reaplist);
1938 spin_unlock(&recall_lock);
1939 list_for_each_safe(pos, next, &reaplist) {
1940 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1941 list_del_init(&dp->dl_recall_lru);
1942 unhash_delegation(dp);
1944 test_val = NFSD_LEASE_TIME;
1945 list_for_each_safe(pos, next, &close_lru) {
1946 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1947 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1948 u = sop->so_time - cutoff;
1953 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1955 list_del(&sop->so_close_lru);
1956 nfs4_put_stateowner(sop);
1958 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1959 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1960 nfs4_unlock_state();
1961 return clientid_val;
1965 laundromat_main(void *not_used)
1969 t = nfs4_laundromat();
1970 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1971 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1974 /* search ownerid_hashtbl[] and close_lru for stateid owner
1975 * (stateid->si_stateownerid)
1977 struct nfs4_stateowner *
1978 find_openstateowner_id(u32 st_id, int flags) {
1979 struct nfs4_stateowner *local = NULL;
1981 dprintk("NFSD: find_openstateowner_id %d\n", st_id);
1982 if (flags & CLOSE_STATE) {
1983 list_for_each_entry(local, &close_lru, so_close_lru) {
1984 if (local->so_id == st_id)
1992 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1994 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
1998 STALE_STATEID(stateid_t *stateid)
2000 if (stateid->si_boot == boot_time)
2002 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
2003 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2004 stateid->si_generation);
2009 access_permit_read(unsigned long access_bmap)
2011 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
2012 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
2013 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
2017 access_permit_write(unsigned long access_bmap)
2019 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
2020 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2024 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2026 int status = nfserr_openmode;
2028 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2030 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2038 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2040 /* Trying to call delegreturn with a special stateid? Yuch: */
2041 if (!(flags & (RD_STATE | WR_STATE)))
2042 return nfserr_bad_stateid;
2043 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2045 else if (nfs4_in_grace()) {
2046 /* Answer in remaining cases depends on existance of
2047 * conflicting state; so we must wait out the grace period. */
2048 return nfserr_grace;
2049 } else if (flags & WR_STATE)
2050 return nfs4_share_conflict(current_fh,
2051 NFS4_SHARE_DENY_WRITE);
2052 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2053 return nfs4_share_conflict(current_fh,
2054 NFS4_SHARE_DENY_READ);
2058 * Allow READ/WRITE during grace period on recovered state only for files
2059 * that are not able to provide mandatory locking.
2062 io_during_grace_disallowed(struct inode *inode, int flags)
2064 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2065 && MANDATORY_LOCK(inode);
2069 * Checks for stateid operations
2072 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2074 struct nfs4_stateid *stp = NULL;
2075 struct nfs4_delegation *dp = NULL;
2077 struct inode *ino = current_fh->fh_dentry->d_inode;
2080 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2081 stateid->si_boot, stateid->si_stateownerid,
2082 stateid->si_fileid, stateid->si_generation);
2086 if (io_during_grace_disallowed(ino, flags))
2087 return nfserr_grace;
2089 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2090 return check_special_stateids(current_fh, stateid, flags);
2093 status = nfserr_stale_stateid;
2094 if (STALE_STATEID(stateid))
2098 status = nfserr_bad_stateid;
2099 if (!stateid->si_fileid) { /* delegation stateid */
2100 if(!(dp = find_delegation_stateid(ino, stateid))) {
2101 dprintk("NFSD: delegation stateid not found\n");
2102 if (nfs4_in_grace())
2103 status = nfserr_grace;
2106 stidp = &dp->dl_stateid;
2107 } else { /* open or lock stateid */
2108 if (!(stp = find_stateid(stateid, flags))) {
2109 dprintk("NFSD: open or lock stateid not found\n");
2110 if (nfs4_in_grace())
2111 status = nfserr_grace;
2114 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2116 if (!stp->st_stateowner->so_confirmed)
2118 stidp = &stp->st_stateid;
2120 if (stateid->si_generation > stidp->si_generation)
2124 status = nfserr_old_stateid;
2125 if (stateid->si_generation < stidp->si_generation)
2128 if ((status = nfs4_check_openmode(stp,flags)))
2130 renew_client(stp->st_stateowner->so_client);
2132 *filpp = stp->st_vfs_file;
2134 if ((status = nfs4_check_delegmode(dp, flags)))
2136 renew_client(dp->dl_client);
2137 if (flags & DELEG_RET)
2138 unhash_delegation(dp);
2140 *filpp = dp->dl_vfs_file;
2149 * Checks for sequence id mutating operations.
2152 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)
2155 struct nfs4_stateid *stp;
2156 struct nfs4_stateowner *sop;
2158 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2159 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2160 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2161 stateid->si_generation);
2166 status = nfserr_bad_stateid;
2167 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2168 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2172 status = nfserr_stale_stateid;
2173 if (STALE_STATEID(stateid))
2176 * We return BAD_STATEID if filehandle doesn't match stateid,
2177 * the confirmed flag is incorrecly set, or the generation
2178 * number is incorrect.
2179 * If there is no entry in the openfile table for this id,
2180 * we can't always return BAD_STATEID;
2181 * this might be a retransmitted CLOSE which has arrived after
2182 * the openfile has been released.
2184 if (!(stp = find_stateid(stateid, flags)))
2185 goto no_nfs4_stateid;
2187 status = nfserr_bad_stateid;
2189 /* for new lock stateowners:
2190 * check that the lock->v.new.open_stateid
2191 * refers to an open stateowner
2193 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2194 * as the open_stateid->st_stateowner->so_client->clientid
2197 struct nfs4_stateowner *sop = stp->st_stateowner;
2198 struct nfs4_client *clp = sop->so_client;
2200 if (!sop->so_is_open_owner)
2202 if (!cmp_clid(&clp->cl_clientid, lockclid))
2206 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2207 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2212 *sopp = sop = stp->st_stateowner;
2215 * We now validate the seqid and stateid generation numbers.
2216 * For the moment, we ignore the possibility of
2217 * generation number wraparound.
2219 if (seqid != sop->so_seqid + 1)
2222 if (sop->so_confirmed) {
2223 if (flags & CONFIRM) {
2224 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2229 if (!(flags & CONFIRM)) {
2230 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2234 if (stateid->si_generation > stp->st_stateid.si_generation) {
2235 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2239 status = nfserr_old_stateid;
2240 if (stateid->si_generation < stp->st_stateid.si_generation) {
2241 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2244 /* XXX renew the client lease here */
2253 * We determine whether this is a bad stateid or a replay,
2254 * starting by trying to look up the stateowner.
2255 * If stateowner is not found - stateid is bad.
2257 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) {
2258 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2259 status = nfserr_bad_stateid;
2265 if (seqid == sop->so_seqid) {
2266 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2267 /* indicate replay to calling function */
2268 status = NFSERR_REPLAY_ME;
2270 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
2273 status = nfserr_bad_seqid;
2279 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
2282 struct nfs4_stateowner *sop;
2283 struct nfs4_stateid *stp;
2285 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2286 (int)current_fh->fh_dentry->d_name.len,
2287 current_fh->fh_dentry->d_name.name);
2289 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2294 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2295 &oc->oc_req_stateid,
2296 CHECK_FH | CONFIRM | OPEN_STATE,
2297 &oc->oc_stateowner, &stp, NULL)))
2300 sop = oc->oc_stateowner;
2301 sop->so_confirmed = 1;
2302 update_stateid(&stp->st_stateid);
2303 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2304 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2305 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2306 stp->st_stateid.si_boot,
2307 stp->st_stateid.si_stateownerid,
2308 stp->st_stateid.si_fileid,
2309 stp->st_stateid.si_generation);
2311 if (oc->oc_stateowner)
2312 nfs4_get_stateowner(oc->oc_stateowner);
2313 nfs4_unlock_state();
2319 * unset all bits in union bitmap (bmap) that
2320 * do not exist in share (from successful OPEN_DOWNGRADE)
2323 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2326 for (i = 1; i < 4; i++) {
2327 if ((i & access) != i)
2328 __clear_bit(i, bmap);
2333 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2336 for (i = 0; i < 4; i++) {
2337 if ((i & deny) != i)
2338 __clear_bit(i, bmap);
2343 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
2346 struct nfs4_stateid *stp;
2347 unsigned int share_access;
2349 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2350 (int)current_fh->fh_dentry->d_name.len,
2351 current_fh->fh_dentry->d_name.name);
2353 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
2354 return nfserr_inval;
2357 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
2359 CHECK_FH | OPEN_STATE,
2360 &od->od_stateowner, &stp, NULL)))
2363 status = nfserr_inval;
2364 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2365 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2366 stp->st_access_bmap, od->od_share_access);
2369 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2370 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2371 stp->st_deny_bmap, od->od_share_deny);
2374 set_access(&share_access, stp->st_access_bmap);
2375 nfs4_file_downgrade(stp->st_vfs_file,
2376 share_access & ~od->od_share_access);
2378 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2379 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2381 update_stateid(&stp->st_stateid);
2382 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2385 if (od->od_stateowner)
2386 nfs4_get_stateowner(od->od_stateowner);
2387 nfs4_unlock_state();
2392 * nfs4_unlock_state() called after encode
2395 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
2398 struct nfs4_stateid *stp;
2400 dprintk("NFSD: nfsd4_close on file %.*s\n",
2401 (int)current_fh->fh_dentry->d_name.len,
2402 current_fh->fh_dentry->d_name.name);
2405 /* check close_lru for replay */
2406 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2408 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2409 &close->cl_stateowner, &stp, NULL)))
2412 * Return success, but first update the stateid.
2415 update_stateid(&stp->st_stateid);
2416 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2418 /* release_state_owner() calls nfsd_close() if needed */
2419 release_state_owner(stp, OPEN_STATE);
2421 if (close->cl_stateowner)
2422 nfs4_get_stateowner(close->cl_stateowner);
2423 nfs4_unlock_state();
2428 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2432 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2436 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2437 nfs4_unlock_state();
2444 * Lock owner state (byte-range locks)
2446 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2447 #define LOCK_HASH_BITS 8
2448 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2449 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2451 #define lockownerid_hashval(id) \
2452 ((id) & LOCK_HASH_MASK)
2454 static inline unsigned int
2455 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2456 struct xdr_netobj *ownername)
2458 return (file_hashval(inode) + cl_id
2459 + opaque_hashval(ownername->data, ownername->len))
2463 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2464 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2465 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2467 struct nfs4_stateid *
2468 find_stateid(stateid_t *stid, int flags)
2470 struct nfs4_stateid *local = NULL;
2471 u32 st_id = stid->si_stateownerid;
2472 u32 f_id = stid->si_fileid;
2473 unsigned int hashval;
2475 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2476 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2477 hashval = stateid_hashval(st_id, f_id);
2478 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2479 if ((local->st_stateid.si_stateownerid == st_id) &&
2480 (local->st_stateid.si_fileid == f_id))
2484 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2485 hashval = stateid_hashval(st_id, f_id);
2486 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2487 if ((local->st_stateid.si_stateownerid == st_id) &&
2488 (local->st_stateid.si_fileid == f_id))
2492 printk("NFSD: find_stateid: ERROR: no state flag\n");
2496 static struct nfs4_delegation *
2497 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2499 struct nfs4_file *fp;
2500 struct nfs4_delegation *dl;
2502 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2503 stid->si_boot, stid->si_stateownerid,
2504 stid->si_fileid, stid->si_generation);
2506 fp = find_file(ino);
2509 dl = find_delegation_file(fp, stid);
2515 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2516 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2517 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2518 * locking, this prevents us from being completely protocol-compliant. The
2519 * real solution to this problem is to start using unsigned file offsets in
2520 * the VFS, but this is a very deep change!
2523 nfs4_transform_lock_offset(struct file_lock *lock)
2525 if (lock->fl_start < 0)
2526 lock->fl_start = OFFSET_MAX;
2527 if (lock->fl_end < 0)
2528 lock->fl_end = OFFSET_MAX;
2532 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
2534 struct nfs4_stateowner *local = NULL;
2537 if (hashval >= LOCK_HASH_SIZE)
2539 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) {
2551 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2553 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
2554 unsigned int hval = lockownerid_hashval(sop->so_id);
2556 deny->ld_sop = NULL;
2557 if (nfs4_verify_lock_stateowner(sop, hval)) {
2558 kref_get(&sop->so_ref);
2560 deny->ld_clientid = sop->so_client->cl_clientid;
2562 deny->ld_start = fl->fl_start;
2563 deny->ld_length = ~(u64)0;
2564 if (fl->fl_end != ~(u64)0)
2565 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2566 deny->ld_type = NFS4_READ_LT;
2567 if (fl->fl_type != F_RDLCK)
2568 deny->ld_type = NFS4_WRITE_LT;
2571 static struct nfs4_stateowner *
2572 find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid)
2574 struct nfs4_stateowner *local = NULL;
2577 for (i = 0; i < LOCK_HASH_SIZE; i++) {
2578 list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) {
2579 if (!cmp_owner_str(local, owner, clid))
2587 static struct nfs4_stateowner *
2588 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2589 struct xdr_netobj *owner)
2591 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2592 struct nfs4_stateowner *op;
2594 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2595 if (cmp_owner_str(op, owner, clid))
2602 * Alloc a lock owner structure.
2603 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2606 * strhashval = lock_ownerstr_hashval
2607 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2610 static struct nfs4_stateowner *
2611 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2612 struct nfs4_stateowner *sop;
2613 struct nfs4_replay *rp;
2614 unsigned int idhashval;
2616 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2618 idhashval = lockownerid_hashval(current_ownerid);
2619 INIT_LIST_HEAD(&sop->so_idhash);
2620 INIT_LIST_HEAD(&sop->so_strhash);
2621 INIT_LIST_HEAD(&sop->so_perclient);
2622 INIT_LIST_HEAD(&sop->so_perfilestate);
2623 INIT_LIST_HEAD(&sop->so_perlockowner);
2624 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2626 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2627 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2628 list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
2629 sop->so_is_open_owner = 0;
2630 sop->so_id = current_ownerid++;
2631 sop->so_client = clp;
2632 sop->so_seqid = lock->lk_new_lock_seqid - 1;
2633 sop->so_confirmed = 1;
2634 rp = &sop->so_replay;
2635 rp->rp_status = NFSERR_SERVERFAULT;
2637 rp->rp_buf = rp->rp_ibuf;
2641 struct nfs4_stateid *
2642 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2644 struct nfs4_stateid *stp;
2645 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2647 stp = nfs4_alloc_stateid();
2650 INIT_LIST_HEAD(&stp->st_hash);
2651 INIT_LIST_HEAD(&stp->st_perfile);
2652 INIT_LIST_HEAD(&stp->st_perfilestate);
2653 INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */
2654 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2655 list_add(&stp->st_perfile, &fp->fi_stateids);
2656 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
2657 stp->st_stateowner = sop;
2660 stp->st_stateid.si_boot = boot_time;
2661 stp->st_stateid.si_stateownerid = sop->so_id;
2662 stp->st_stateid.si_fileid = fp->fi_id;
2663 stp->st_stateid.si_generation = 0;
2664 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2665 stp->st_access_bmap = open_stp->st_access_bmap;
2666 stp->st_deny_bmap = open_stp->st_deny_bmap;
2673 check_lock_length(u64 offset, u64 length)
2675 return ((length == 0) || ((length != ~(u64)0) &&
2676 LOFF_OVERFLOW(offset, length)));
2683 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
2685 struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL;
2686 struct nfs4_stateid *lock_stp;
2688 struct file_lock file_lock;
2689 struct file_lock *conflock;
2691 unsigned int strhashval;
2693 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2694 (long long) lock->lk_offset,
2695 (long long) lock->lk_length);
2697 if (nfs4_in_grace() && !lock->lk_reclaim)
2698 return nfserr_grace;
2699 if (!nfs4_in_grace() && lock->lk_reclaim)
2700 return nfserr_no_grace;
2702 if (check_lock_length(lock->lk_offset, lock->lk_length))
2703 return nfserr_inval;
2707 if (lock->lk_is_new) {
2709 * Client indicates that this is a new lockowner.
2710 * Use open owner and open stateid to create lock owner and lock
2713 struct nfs4_stateid *open_stp = NULL;
2714 struct nfs4_file *fp;
2716 status = nfserr_stale_clientid;
2717 if (STALE_CLIENTID(&lock->lk_new_clientid)) {
2718 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2722 /* is the new lock seqid presented by the client zero? */
2723 status = nfserr_bad_seqid;
2724 if (lock->v.new.lock_seqid != 0)
2727 /* validate and update open stateid and open seqid */
2728 status = nfs4_preprocess_seqid_op(current_fh,
2729 lock->lk_new_open_seqid,
2730 &lock->lk_new_open_stateid,
2731 CHECK_FH | OPEN_STATE,
2732 &open_sop, &open_stp,
2733 &lock->v.new.clientid);
2735 if (lock->lk_reclaim)
2736 status = nfserr_reclaim_bad;
2739 /* create lockowner and lock stateid */
2740 fp = open_stp->st_file;
2741 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2742 open_sop->so_client->cl_clientid.cl_id,
2743 &lock->v.new.owner);
2745 * If we already have this lock owner, the client is in
2746 * error (or our bookeeping is wrong!)
2747 * for asking for a 'new lock'.
2749 status = nfserr_bad_stateid;
2750 lock_sop = find_lockstateowner(&lock->v.new.owner,
2751 &lock->v.new.clientid);
2754 status = nfserr_resource;
2755 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
2757 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
2758 fp, open_stp)) == NULL) {
2759 release_stateowner(lock->lk_stateowner);
2760 lock->lk_stateowner = NULL;
2763 /* bump the open seqid used to create the lock */
2764 open_sop->so_seqid++;
2766 /* lock (lock owner + lock stateid) already exists */
2767 status = nfs4_preprocess_seqid_op(current_fh,
2768 lock->lk_old_lock_seqid,
2769 &lock->lk_old_lock_stateid,
2770 CHECK_FH | LOCK_STATE,
2771 &lock->lk_stateowner, &lock_stp, NULL);
2775 /* lock->lk_stateowner and lock_stp have been created or found */
2776 filp = lock_stp->st_vfs_file;
2778 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2779 printk("NFSD: nfsd4_lock: permission denied!\n");
2783 locks_init_lock(&file_lock);
2784 switch (lock->lk_type) {
2787 file_lock.fl_type = F_RDLCK;
2790 case NFS4_WRITEW_LT:
2791 file_lock.fl_type = F_WRLCK;
2794 status = nfserr_inval;
2797 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
2798 file_lock.fl_pid = current->tgid;
2799 file_lock.fl_file = filp;
2800 file_lock.fl_flags = FL_POSIX;
2802 file_lock.fl_start = lock->lk_offset;
2803 if ((lock->lk_length == ~(u64)0) ||
2804 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2805 file_lock.fl_end = ~(u64)0;
2807 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2808 nfs4_transform_lock_offset(&file_lock);
2811 * Try to lock the file in the VFS.
2812 * Note: locks.c uses the BKL to protect the inode's lock list.
2815 status = posix_lock_file(filp, &file_lock);
2816 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2817 file_lock.fl_ops->fl_release_private(&file_lock);
2818 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status);
2820 case 0: /* success! */
2821 update_stateid(&lock_stp->st_stateid);
2822 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2826 goto conflicting_lock;
2828 status = nfserr_deadlock;
2830 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
2831 goto out_destroy_new_stateid;
2835 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2836 status = nfserr_denied;
2837 /* XXX There is a race here. Future patch needed to provide
2838 * an atomic posix_lock_and_test_file
2840 if (!(conflock = posix_test_lock(filp, &file_lock))) {
2841 status = nfserr_serverfault;
2844 nfs4_set_lock_denied(conflock, &lock->lk_denied);
2846 out_destroy_new_stateid:
2847 if (lock->lk_is_new) {
2848 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2850 * An error encountered after instantiation of the new
2851 * stateid has forced us to destroy it.
2853 if (!seqid_mutating_err(status))
2854 open_sop->so_seqid--;
2856 release_state_owner(lock_stp, LOCK_STATE);
2859 if (lock->lk_stateowner)
2860 nfs4_get_stateowner(lock->lk_stateowner);
2861 nfs4_unlock_state();
2869 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2871 struct inode *inode;
2873 struct file_lock file_lock;
2874 struct file_lock *conflicting_lock;
2877 if (nfs4_in_grace())
2878 return nfserr_grace;
2880 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2881 return nfserr_inval;
2883 lockt->lt_stateowner = NULL;
2886 status = nfserr_stale_clientid;
2887 if (STALE_CLIENTID(&lockt->lt_clientid)) {
2888 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2892 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2893 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2894 if (status == nfserr_symlink)
2895 status = nfserr_inval;
2899 inode = current_fh->fh_dentry->d_inode;
2900 locks_init_lock(&file_lock);
2901 switch (lockt->lt_type) {
2904 file_lock.fl_type = F_RDLCK;
2907 case NFS4_WRITEW_LT:
2908 file_lock.fl_type = F_WRLCK;
2911 printk("NFSD: nfs4_lockt: bad lock type!\n");
2912 status = nfserr_inval;
2916 lockt->lt_stateowner = find_lockstateowner_str(inode,
2917 &lockt->lt_clientid, &lockt->lt_owner);
2918 if (lockt->lt_stateowner)
2919 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2920 file_lock.fl_pid = current->tgid;
2921 file_lock.fl_flags = FL_POSIX;
2923 file_lock.fl_start = lockt->lt_offset;
2924 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2925 file_lock.fl_end = ~(u64)0;
2927 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2929 nfs4_transform_lock_offset(&file_lock);
2931 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2932 * since LOCKT doesn't require an OPEN, and therefore a struct
2933 * file may not exist, pass posix_test_lock a struct file with
2934 * only the dentry:inode set.
2936 memset(&file, 0, sizeof (struct file));
2937 file.f_dentry = current_fh->fh_dentry;
2940 conflicting_lock = posix_test_lock(&file, &file_lock);
2941 if (conflicting_lock) {
2942 status = nfserr_denied;
2943 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
2946 nfs4_unlock_state();
2951 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
2953 struct nfs4_stateid *stp;
2954 struct file *filp = NULL;
2955 struct file_lock file_lock;
2958 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2959 (long long) locku->lu_offset,
2960 (long long) locku->lu_length);
2962 if (check_lock_length(locku->lu_offset, locku->lu_length))
2963 return nfserr_inval;
2967 if ((status = nfs4_preprocess_seqid_op(current_fh,
2970 CHECK_FH | LOCK_STATE,
2971 &locku->lu_stateowner, &stp, NULL)))
2974 filp = stp->st_vfs_file;
2976 locks_init_lock(&file_lock);
2977 file_lock.fl_type = F_UNLCK;
2978 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2979 file_lock.fl_pid = current->tgid;
2980 file_lock.fl_file = filp;
2981 file_lock.fl_flags = FL_POSIX;
2982 file_lock.fl_start = locku->lu_offset;
2984 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2985 file_lock.fl_end = ~(u64)0;
2987 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2988 nfs4_transform_lock_offset(&file_lock);
2991 * Try to unlock the file in the VFS.
2993 status = posix_lock_file(filp, &file_lock);
2994 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2995 file_lock.fl_ops->fl_release_private(&file_lock);
2997 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
3001 * OK, unlock succeeded; the only thing left to do is update the stateid.
3003 update_stateid(&stp->st_stateid);
3004 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
3007 if (locku->lu_stateowner)
3008 nfs4_get_stateowner(locku->lu_stateowner);
3009 nfs4_unlock_state();
3013 status = nfserrno(status);
3019 * 1: locks held by lockowner
3020 * 0: no locks held by lockowner
3023 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
3025 struct file_lock **flpp;
3026 struct inode *inode = filp->f_dentry->d_inode;
3030 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
3031 if ((*flpp)->fl_owner == (fl_owner_t)lowner)
3041 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
3043 clientid_t *clid = &rlockowner->rl_clientid;
3044 struct nfs4_stateowner *local = NULL;
3045 struct xdr_netobj *owner = &rlockowner->rl_owner;
3048 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3049 clid->cl_boot, clid->cl_id);
3051 /* XXX check for lease expiration */
3053 status = nfserr_stale_clientid;
3054 if (STALE_CLIENTID(clid)) {
3055 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3062 local = find_lockstateowner(owner, clid);
3064 struct nfs4_stateid *stp;
3066 /* check for any locks held by any stateid
3067 * associated with the (lock) stateowner */
3068 status = nfserr_locks_held;
3069 list_for_each_entry(stp, &local->so_perfilestate,
3071 if (check_for_locks(stp->st_vfs_file, local))
3074 /* no locks held by (lock) stateowner */
3076 release_stateowner(local);
3079 nfs4_unlock_state();
3083 static inline struct nfs4_client_reclaim *
3086 return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3090 * failure => all reset bets are off, nfserr_no_grace...
3093 nfs4_client_to_reclaim(char *name)
3095 unsigned int strhashval;
3096 struct nfs4_client_reclaim *crp = NULL;
3098 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
3099 crp = alloc_reclaim();
3102 strhashval = clientstr_hashval(name);
3103 INIT_LIST_HEAD(&crp->cr_strhash);
3104 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3105 memcpy(crp->cr_recdir, name, HEXDIR_LEN);
3106 reclaim_str_hashtbl_size++;
3111 nfs4_release_reclaim(void)
3113 struct nfs4_client_reclaim *crp = NULL;
3116 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3117 while (!list_empty(&reclaim_str_hashtbl[i])) {
3118 crp = list_entry(reclaim_str_hashtbl[i].next,
3119 struct nfs4_client_reclaim, cr_strhash);
3120 list_del(&crp->cr_strhash);
3122 reclaim_str_hashtbl_size--;
3125 BUG_ON(reclaim_str_hashtbl_size);
3129 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3130 struct nfs4_client_reclaim *
3131 nfs4_find_reclaim_client(clientid_t *clid)
3133 unsigned int strhashval;
3134 struct nfs4_client *clp;
3135 struct nfs4_client_reclaim *crp = NULL;
3138 /* find clientid in conf_id_hashtbl */
3139 clp = find_confirmed_client(clid);
3143 dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n",
3144 clp->cl_name.len, clp->cl_name.data,
3147 /* find clp->cl_name in reclaim_str_hashtbl */
3148 strhashval = clientstr_hashval(clp->cl_recdir);
3149 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3150 if (same_name(crp->cr_recdir, clp->cl_recdir)) {
3158 * Called from OPEN. Look for clientid in reclaim list.
3161 nfs4_check_open_reclaim(clientid_t *clid)
3163 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3166 /* initialization to perform at module load time: */
3169 nfs4_state_init(void)
3173 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3174 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3175 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3176 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3177 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3179 for (i = 0; i < FILE_HASH_SIZE; i++) {
3180 INIT_LIST_HEAD(&file_hashtbl[i]);
3182 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3183 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3184 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3186 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3187 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3188 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3190 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3191 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3192 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3194 memset(&onestateid, ~0, sizeof(stateid_t));
3195 INIT_LIST_HEAD(&close_lru);
3196 INIT_LIST_HEAD(&client_lru);
3197 INIT_LIST_HEAD(&del_recall_lru);
3198 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3199 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3200 reclaim_str_hashtbl_size = 0;
3203 /* initialization to perform when the nfsd service is started: */
3206 __nfs4_state_start(void)
3210 boot_time = get_seconds();
3211 grace_time = max(user_lease_time, lease_time);
3212 lease_time = user_lease_time;
3213 printk("NFSD: starting %ld-second grace period\n", grace_time);
3214 grace_end = boot_time + grace_time;
3215 laundry_wq = create_singlethread_workqueue("nfsd4");
3216 queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ);
3220 nfs4_state_start(void)
3226 status = nfsd4_init_slabs();
3229 __nfs4_state_start();
3237 return get_seconds() < grace_end;
3243 printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n");
3244 grace_end = get_seconds();
3248 nfs4_lease_time(void)
3254 __nfs4_state_shutdown(void)
3257 struct nfs4_client *clp = NULL;
3258 struct nfs4_delegation *dp = NULL;
3259 struct nfs4_stateowner *sop = NULL;
3260 struct list_head *pos, *next, reaplist;
3262 list_for_each_safe(pos, next, &close_lru) {
3263 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
3264 list_del(&sop->so_close_lru);
3265 nfs4_put_stateowner(sop);
3268 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3269 while (!list_empty(&conf_id_hashtbl[i])) {
3270 clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);
3273 while (!list_empty(&unconf_str_hashtbl[i])) {
3274 clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash);
3278 INIT_LIST_HEAD(&reaplist);
3279 spin_lock(&recall_lock);
3280 list_for_each_safe(pos, next, &del_recall_lru) {
3281 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3282 list_move(&dp->dl_recall_lru, &reaplist);
3284 spin_unlock(&recall_lock);
3285 list_for_each_safe(pos, next, &reaplist) {
3286 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
3287 list_del_init(&dp->dl_recall_lru);
3288 unhash_delegation(dp);
3291 cancel_delayed_work(&laundromat_work);
3292 flush_workqueue(laundry_wq);
3293 destroy_workqueue(laundry_wq);
3298 nfs4_state_shutdown(void)
3301 nfs4_release_reclaim();
3302 __nfs4_state_shutdown();
3304 nfs4_unlock_state();
3308 * Called when leasetime is changed.
3310 * The only way the protocol gives us to handle on-the-fly lease changes is to
3311 * simulate a reboot. Instead of doing that, we just wait till the next time
3312 * we start to register any changes in lease time. If the administrator
3313 * really wants to change the lease time *now*, they can go ahead and bring
3314 * nfsd down and then back up again after changing the lease time.
3317 nfs4_reset_lease(time_t leasetime)
3320 user_lease_time = leasetime;