2 * linux/fs/nfsd/nfs4state.c
4 * Copyright (c) 2001 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <kandros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/param.h>
38 #include <linux/major.h>
39 #include <linux/slab.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/cache.h>
44 #include <linux/mount.h>
45 #include <linux/workqueue.h>
46 #include <linux/smp_lock.h>
47 #include <linux/kthread.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfsd/state.h>
50 #include <linux/nfsd/xdr4.h>
52 #define NFSDDBG_FACILITY NFSDDBG_PROC
55 static time_t lease_time = 90; /* default lease time */
56 static time_t old_lease_time = 90; /* past incarnation lease time */
57 static u32 nfs4_reclaim_init = 0;
59 static time_t grace_end = 0;
60 static u32 current_clientid = 1;
61 static u32 current_ownerid = 1;
62 static u32 current_fileid = 1;
63 static u32 current_delegid = 1;
65 stateid_t zerostateid; /* bits all 0 */
66 stateid_t onestateid; /* bits all 1 */
68 /* forward declarations */
69 struct nfs4_stateid * find_stateid(stateid_t *stid, int flags);
70 static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid);
71 static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
76 * protects clientid_hashtbl[], clientstr_hashtbl[],
77 * unconfstr_hashtbl[], uncofid_hashtbl[].
79 static DECLARE_MUTEX(client_sema);
81 kmem_cache_t *stateowner_slab = NULL;
82 kmem_cache_t *file_slab = NULL;
83 kmem_cache_t *stateid_slab = NULL;
84 kmem_cache_t *deleg_slab = NULL;
93 nfs4_unlock_state(void)
99 opaque_hashval(const void *ptr, int nbytes)
101 unsigned char *cptr = (unsigned char *) ptr;
111 /* forward declarations */
112 static void release_stateowner(struct nfs4_stateowner *sop);
113 static void release_stateid(struct nfs4_stateid *stp, int flags);
119 /* recall_lock protects the del_recall_lru */
120 spinlock_t recall_lock;
121 static struct list_head del_recall_lru;
124 free_nfs4_file(struct kref *kref)
126 struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref);
127 list_del(&fp->fi_hash);
129 kmem_cache_free(file_slab, fp);
133 put_nfs4_file(struct nfs4_file *fi)
135 kref_put(&fi->fi_ref, free_nfs4_file);
139 get_nfs4_file(struct nfs4_file *fi)
141 kref_get(&fi->fi_ref);
144 static struct nfs4_delegation *
145 alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type)
147 struct nfs4_delegation *dp;
148 struct nfs4_file *fp = stp->st_file;
149 struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
151 dprintk("NFSD alloc_init_deleg\n");
152 dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
155 INIT_LIST_HEAD(&dp->dl_del_perfile);
156 INIT_LIST_HEAD(&dp->dl_del_perclnt);
157 INIT_LIST_HEAD(&dp->dl_recall_lru);
162 get_file(stp->st_vfs_file);
163 dp->dl_vfs_file = stp->st_vfs_file;
165 dp->dl_recall.cbr_dp = NULL;
166 dp->dl_recall.cbr_ident = cb->cb_ident;
167 dp->dl_recall.cbr_trunc = 0;
168 dp->dl_stateid.si_boot = boot_time;
169 dp->dl_stateid.si_stateownerid = current_delegid++;
170 dp->dl_stateid.si_fileid = 0;
171 dp->dl_stateid.si_generation = 0;
172 dp->dl_fhlen = current_fh->fh_handle.fh_size;
173 memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base,
174 current_fh->fh_handle.fh_size);
176 atomic_set(&dp->dl_count, 1);
177 list_add(&dp->dl_del_perfile, &fp->fi_delegations);
178 list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt);
183 nfs4_put_delegation(struct nfs4_delegation *dp)
185 if (atomic_dec_and_test(&dp->dl_count)) {
186 dprintk("NFSD: freeing dp %p\n",dp);
187 put_nfs4_file(dp->dl_file);
188 kmem_cache_free(deleg_slab, dp);
192 /* Remove the associated file_lock first, then remove the delegation.
193 * lease_modify() is called to remove the FS_LEASE file_lock from
194 * the i_flock list, eventually calling nfsd's lock_manager
195 * fl_release_callback.
198 nfs4_close_delegation(struct nfs4_delegation *dp)
200 struct file *filp = dp->dl_vfs_file;
202 dprintk("NFSD: close_delegation dp %p\n",dp);
203 dp->dl_vfs_file = NULL;
204 /* The following nfsd_close may not actually close the file,
205 * but we want to remove the lease in any case. */
207 setlease(filp, F_UNLCK, &dp->dl_flock);
211 /* Called under the state lock. */
213 unhash_delegation(struct nfs4_delegation *dp)
215 list_del_init(&dp->dl_del_perfile);
216 list_del_init(&dp->dl_del_perclnt);
217 spin_lock(&recall_lock);
218 list_del_init(&dp->dl_recall_lru);
219 spin_unlock(&recall_lock);
220 nfs4_close_delegation(dp);
221 nfs4_put_delegation(dp);
228 /* Hash tables for nfs4_clientid state */
229 #define CLIENT_HASH_BITS 4
230 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
231 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
233 #define clientid_hashval(id) \
234 ((id) & CLIENT_HASH_MASK)
235 #define clientstr_hashval(name, namelen) \
236 (opaque_hashval((name), (namelen)) & CLIENT_HASH_MASK)
238 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
239 * used in reboot/reset lease grace period processing
241 * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed
242 * setclientid_confirmed info.
244 * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed
247 * client_lru holds client queue ordered by nfs4_client.cl_time
250 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
251 * for last close replay.
253 static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE];
254 static int reclaim_str_hashtbl_size = 0;
255 static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE];
256 static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE];
257 static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE];
258 static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE];
259 static struct list_head client_lru;
260 static struct list_head close_lru;
263 renew_client(struct nfs4_client *clp)
266 * Move client to the end to the LRU list.
268 dprintk("renewing client (clientid %08x/%08x)\n",
269 clp->cl_clientid.cl_boot,
270 clp->cl_clientid.cl_id);
271 list_move_tail(&clp->cl_lru, &client_lru);
272 clp->cl_time = get_seconds();
275 /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */
277 STALE_CLIENTID(clientid_t *clid)
279 if (clid->cl_boot == boot_time)
281 dprintk("NFSD stale clientid (%08x/%08x)\n",
282 clid->cl_boot, clid->cl_id);
287 * XXX Should we use a slab cache ?
288 * This type of memory management is somewhat inefficient, but we use it
289 * anyway since SETCLIENTID is not a common operation.
291 static inline struct nfs4_client *
292 alloc_client(struct xdr_netobj name)
294 struct nfs4_client *clp;
296 if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) {
297 memset(clp, 0, sizeof(*clp));
298 if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) {
299 memcpy(clp->cl_name.data, name.data, name.len);
300 clp->cl_name.len = name.len;
311 free_client(struct nfs4_client *clp)
313 if (clp->cl_cred.cr_group_info)
314 put_group_info(clp->cl_cred.cr_group_info);
315 kfree(clp->cl_name.data);
320 put_nfs4_client(struct nfs4_client *clp)
322 if (atomic_dec_and_test(&clp->cl_count))
327 expire_client(struct nfs4_client *clp)
329 struct nfs4_stateowner *sop;
330 struct nfs4_delegation *dp;
331 struct nfs4_callback *cb = &clp->cl_callback;
332 struct rpc_clnt *clnt = clp->cl_callback.cb_client;
333 struct list_head reaplist;
335 dprintk("NFSD: expire_client cl_count %d\n",
336 atomic_read(&clp->cl_count));
338 /* shutdown rpc client, ending any outstanding recall rpcs */
339 if (atomic_read(&cb->cb_set) == 1 && clnt) {
340 rpc_shutdown_client(clnt);
341 clnt = clp->cl_callback.cb_client = NULL;
344 INIT_LIST_HEAD(&reaplist);
345 spin_lock(&recall_lock);
346 while (!list_empty(&clp->cl_del_perclnt)) {
347 dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt);
348 dprintk("NFSD: expire client. dp %p, fp %p\n", dp,
350 list_del_init(&dp->dl_del_perclnt);
351 list_move(&dp->dl_recall_lru, &reaplist);
353 spin_unlock(&recall_lock);
354 while (!list_empty(&reaplist)) {
355 dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
356 list_del_init(&dp->dl_recall_lru);
357 unhash_delegation(dp);
359 list_del(&clp->cl_idhash);
360 list_del(&clp->cl_strhash);
361 list_del(&clp->cl_lru);
362 while (!list_empty(&clp->cl_perclient)) {
363 sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient);
364 release_stateowner(sop);
366 put_nfs4_client(clp);
369 static struct nfs4_client *
370 create_client(struct xdr_netobj name) {
371 struct nfs4_client *clp;
373 if (!(clp = alloc_client(name)))
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 cmp_name(struct xdr_netobj *n1, struct xdr_netobj *n2) {
411 return((n1->len == n2->len) && !memcmp(n1->data, n2->data, n2->len));
415 cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) {
416 return(!memcmp(v1->data,v2->data,sizeof(v1->data)));
420 cmp_clid(clientid_t * cl1, clientid_t * cl2) {
421 return((cl1->cl_boot == cl2->cl_boot) &&
422 (cl1->cl_id == cl2->cl_id));
425 /* XXX what about NGROUP */
427 cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){
428 return(cr1->cr_uid == cr2->cr_uid);
433 gen_clid(struct nfs4_client *clp) {
434 clp->cl_clientid.cl_boot = boot_time;
435 clp->cl_clientid.cl_id = current_clientid++;
439 gen_confirm(struct nfs4_client *clp) {
444 p = (u32 *)clp->cl_confirm.data;
450 check_name(struct xdr_netobj name) {
454 if (name.len > NFS4_OPAQUE_LIMIT) {
455 printk("NFSD: check_name: name too long(%d)!\n", name.len);
462 add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval)
464 unsigned int idhashval;
466 list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]);
467 idhashval = clientid_hashval(clp->cl_clientid.cl_id);
468 list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]);
469 list_add_tail(&clp->cl_lru, &client_lru);
470 clp->cl_time = get_seconds();
474 move_to_confirmed(struct nfs4_client *clp)
476 unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id);
477 unsigned int strhashval;
479 dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
480 list_del_init(&clp->cl_strhash);
481 list_del_init(&clp->cl_idhash);
482 list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]);
483 strhashval = clientstr_hashval(clp->cl_name.data,
485 list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]);
489 static struct nfs4_client *
490 find_confirmed_client(clientid_t *clid)
492 struct nfs4_client *clp;
493 unsigned int idhashval = clientid_hashval(clid->cl_id);
495 list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) {
496 if (cmp_clid(&clp->cl_clientid, clid))
502 static struct nfs4_client *
503 find_unconfirmed_client(clientid_t *clid)
505 struct nfs4_client *clp;
506 unsigned int idhashval = clientid_hashval(clid->cl_id);
508 list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) {
509 if (cmp_clid(&clp->cl_clientid, clid))
515 /* a helper function for parse_callback */
517 parse_octet(unsigned int *lenp, char **addrp)
519 unsigned int len = *lenp;
531 if ((c < '0') || (c > '9')) {
537 n = (n * 10) + (c - '0');
548 /* parse and set the setclientid ipv4 callback address */
550 parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp)
555 u32 addrlen = addr_len;
556 char *addr = addr_val;
561 for(i = 4; i > 0 ; i--) {
562 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
565 cbaddr |= (temp << shift);
573 for(i = 2; i > 0 ; i--) {
574 if ((temp = parse_octet(&addrlen, &addr)) < 0) {
577 cbport |= (temp << shift);
586 gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se)
588 struct nfs4_callback *cb = &clp->cl_callback;
590 /* Currently, we only support tcp for the callback channel */
591 if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3))
594 if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val,
595 &cb->cb_addr, &cb->cb_port)))
597 cb->cb_prog = se->se_callback_prog;
598 cb->cb_ident = se->se_callback_ident;
602 printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) "
603 "will not receive delegations\n",
604 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
611 * RFC 3010 has a complex implmentation description of processing a
612 * SETCLIENTID request consisting of 5 bullets, labeled as
613 * CASE0 - CASE4 below.
616 * callback information will be processed in a future patch
618 * an unconfirmed record is added when:
619 * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
620 * CASE 1: confirmed record found with matching name, principal,
621 * verifier, and clientid.
622 * CASE 2: confirmed record found with matching name, principal,
623 * and there is no unconfirmed record with matching
626 * an unconfirmed record is replaced when:
627 * CASE 3: confirmed record found with matching name, principal,
628 * and an unconfirmed record is found with matching
629 * name, principal, and with clientid and
630 * confirm that does not match the confirmed record.
631 * CASE 4: there is no confirmed record with matching name and
632 * principal. there is an unconfirmed record with
633 * matching name, principal.
635 * an unconfirmed record is deleted when:
636 * CASE 1: an unconfirmed record that matches input name, verifier,
637 * and confirmed clientid.
638 * CASE 4: any unconfirmed records with matching name and principal
639 * that exist after an unconfirmed record has been replaced
640 * as described above.
644 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
646 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
647 struct xdr_netobj clname = {
648 .len = setclid->se_namelen,
649 .data = setclid->se_name,
651 nfs4_verifier clverifier = setclid->se_verf;
652 unsigned int strhashval;
653 struct nfs4_client * conf, * unconf, * new, * clp;
656 status = nfserr_inval;
657 if (!check_name(clname))
661 * XXX The Duplicate Request Cache (DRC) has been checked (??)
662 * We get here on a DRC miss.
665 strhashval = clientstr_hashval(clname.data, clname.len);
669 list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) {
670 if (!cmp_name(&clp->cl_name, &clname))
674 * clname match, confirmed, different principal
675 * or different ip_address
677 status = nfserr_clid_inuse;
678 if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred)) {
679 printk("NFSD: setclientid: string in use by client"
680 "(clientid %08x/%08x)\n",
681 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
684 if (clp->cl_addr != ip_addr) {
685 printk("NFSD: setclientid: string in use by client"
686 "(clientid %08x/%08x)\n",
687 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
692 * cl_name match from a previous SETCLIENTID operation
693 * XXX check for additional matches?
699 list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) {
700 if (!cmp_name(&clp->cl_name, &clname))
702 /* cl_name match from a previous SETCLIENTID operation */
706 status = nfserr_resource;
710 * placed first, because it is the normal case.
713 expire_client(unconf);
714 if (!(new = create_client(clname)))
716 copy_verf(new, &clverifier);
717 new->cl_addr = ip_addr;
718 copy_cred(&new->cl_cred,&rqstp->rq_cred);
721 gen_callback(new, setclid);
722 add_to_unconfirmed(new, strhashval);
723 } else if (cmp_verf(&conf->cl_verifier, &clverifier)) {
726 * cl_name match, confirmed, principal match
727 * verifier match: probable callback update
729 * remove any unconfirmed nfs4_client with
730 * matching cl_name, cl_verifier, and cl_clientid
732 * create and insert an unconfirmed nfs4_client with same
733 * cl_name, cl_verifier, and cl_clientid as existing
734 * nfs4_client, but with the new callback info and a
738 cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) &&
739 cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) {
740 expire_client(unconf);
742 if (!(new = create_client(clname)))
744 copy_verf(new,&conf->cl_verifier);
745 new->cl_addr = ip_addr;
746 copy_cred(&new->cl_cred,&rqstp->rq_cred);
747 copy_clid(new, conf);
749 gen_callback(new, setclid);
750 add_to_unconfirmed(new,strhashval);
751 } else if (!unconf) {
754 * clname match, confirmed, principal match
755 * verfier does not match
756 * no unconfirmed. create a new unconfirmed nfs4_client
757 * using input clverifier, clname, and callback info
758 * and generate a new cl_clientid and cl_confirm.
760 if (!(new = create_client(clname)))
762 copy_verf(new,&clverifier);
763 new->cl_addr = ip_addr;
764 copy_cred(&new->cl_cred,&rqstp->rq_cred);
767 gen_callback(new, setclid);
768 add_to_unconfirmed(new, strhashval);
769 } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
772 * confirmed found (name, principal match)
773 * confirmed verifier does not match input clverifier
775 * unconfirmed found (name match)
776 * confirmed->cl_confirm != unconfirmed->cl_confirm
778 * remove unconfirmed.
780 * create an unconfirmed nfs4_client
781 * with same cl_name as existing confirmed nfs4_client,
782 * but with new callback info, new cl_clientid,
783 * new cl_verifier and a new cl_confirm
785 expire_client(unconf);
786 if (!(new = create_client(clname)))
788 copy_verf(new,&clverifier);
789 new->cl_addr = ip_addr;
790 copy_cred(&new->cl_cred,&rqstp->rq_cred);
793 gen_callback(new, setclid);
794 add_to_unconfirmed(new, strhashval);
796 /* No cases hit !!! */
797 status = nfserr_inval;
801 setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
802 setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
803 memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
812 * RFC 3010 has a complex implmentation description of processing a
813 * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
814 * processing on a DRC miss, labeled as CASE1 - CASE4 below.
816 * NOTE: callback information will be processed here in a future patch
819 nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
821 u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
822 struct nfs4_client *clp, *conf = NULL, *unconf = NULL;
823 nfs4_verifier confirm = setclientid_confirm->sc_confirm;
824 clientid_t * clid = &setclientid_confirm->sc_clientid;
827 if (STALE_CLIENTID(clid))
828 return nfserr_stale_clientid;
830 * XXX The Duplicate Request Cache (DRC) has been checked (??)
831 * We get here on a DRC miss.
835 clp = find_confirmed_client(clid);
837 status = nfserr_inval;
839 * Found a record for this clientid. If the IP addresses
840 * don't match, return ERR_INVAL just as if the record had
843 if (clp->cl_addr != ip_addr) {
844 printk("NFSD: setclientid: string in use by client"
845 "(clientid %08x/%08x)\n",
846 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
851 clp = find_unconfirmed_client(clid);
853 status = nfserr_inval;
854 if (clp->cl_addr != ip_addr) {
855 printk("NFSD: setclientid: string in use by client"
856 "(clientid %08x/%08x)\n",
857 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
863 * unconf record that matches input clientid and input confirm.
864 * conf record that matches input clientid.
865 * conf and unconf records match names, verifiers
867 if ((conf && unconf) &&
868 (cmp_verf(&unconf->cl_confirm, &confirm)) &&
869 (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
870 (cmp_name(&conf->cl_name,&unconf->cl_name)) &&
871 (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
872 if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred))
873 status = nfserr_clid_inuse;
877 move_to_confirmed(unconf);
883 * conf record that matches input clientid.
884 * if unconf record that matches input clientid, then unconf->cl_name
885 * or unconf->cl_verifier don't match the conf record.
887 if ((conf && !unconf) ||
889 (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
890 !cmp_name(&conf->cl_name, &unconf->cl_name)))) {
891 if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) {
892 status = nfserr_clid_inuse;
900 * conf record not found.
901 * unconf record found.
902 * unconf->cl_confirm matches input confirm
904 if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) {
905 if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
906 status = nfserr_clid_inuse;
910 move_to_confirmed(unconf);
915 * conf record not found, or if conf, then conf->cl_confirm does not
916 * match input confirm.
917 * unconf record not found, or if unconf, then unconf->cl_confirm
918 * does not match input confirm.
920 if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) &&
921 (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) {
922 status = nfserr_stale_clientid;
925 /* check that we have hit one of the cases...*/
926 status = nfserr_inval;
930 nfsd4_probe_callback(clp);
936 * Open owner state (share locks)
939 /* hash tables for nfs4_stateowner */
940 #define OWNER_HASH_BITS 8
941 #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS)
942 #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1)
944 #define ownerid_hashval(id) \
945 ((id) & OWNER_HASH_MASK)
946 #define ownerstr_hashval(clientid, ownername) \
947 (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK)
949 static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE];
950 static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE];
952 /* hash table for nfs4_file */
953 #define FILE_HASH_BITS 8
954 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
955 #define FILE_HASH_MASK (FILE_HASH_SIZE - 1)
956 /* hash table for (open)nfs4_stateid */
957 #define STATEID_HASH_BITS 10
958 #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS)
959 #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1)
961 #define file_hashval(x) \
962 hash_ptr(x, FILE_HASH_BITS)
963 #define stateid_hashval(owner_id, file_id) \
964 (((owner_id) + (file_id)) & STATEID_HASH_MASK)
966 static struct list_head file_hashtbl[FILE_HASH_SIZE];
967 static struct list_head stateid_hashtbl[STATEID_HASH_SIZE];
969 /* OPEN Share state helper functions */
970 static inline struct nfs4_file *
971 alloc_init_file(struct inode *ino)
973 struct nfs4_file *fp;
974 unsigned int hashval = file_hashval(ino);
976 fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
978 kref_init(&fp->fi_ref);
979 INIT_LIST_HEAD(&fp->fi_hash);
980 INIT_LIST_HEAD(&fp->fi_stateids);
981 INIT_LIST_HEAD(&fp->fi_delegations);
982 list_add(&fp->fi_hash, &file_hashtbl[hashval]);
983 fp->fi_inode = igrab(ino);
984 fp->fi_id = current_fileid++;
991 nfsd4_free_slab(kmem_cache_t **slab)
997 status = kmem_cache_destroy(*slab);
1003 nfsd4_free_slabs(void)
1005 nfsd4_free_slab(&stateowner_slab);
1006 nfsd4_free_slab(&file_slab);
1007 nfsd4_free_slab(&stateid_slab);
1008 nfsd4_free_slab(&deleg_slab);
1012 nfsd4_init_slabs(void)
1014 stateowner_slab = kmem_cache_create("nfsd4_stateowners",
1015 sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
1016 if (stateowner_slab == NULL)
1018 file_slab = kmem_cache_create("nfsd4_files",
1019 sizeof(struct nfs4_file), 0, 0, NULL, NULL);
1020 if (file_slab == NULL)
1022 stateid_slab = kmem_cache_create("nfsd4_stateids",
1023 sizeof(struct nfs4_stateid), 0, 0, NULL, NULL);
1024 if (stateid_slab == NULL)
1026 deleg_slab = kmem_cache_create("nfsd4_delegations",
1027 sizeof(struct nfs4_delegation), 0, 0, NULL, NULL);
1028 if (deleg_slab == NULL)
1033 dprintk("nfsd4: out of memory while initializing nfsv4\n");
1038 nfs4_free_stateowner(struct kref *kref)
1040 struct nfs4_stateowner *sop =
1041 container_of(kref, struct nfs4_stateowner, so_ref);
1042 kfree(sop->so_owner.data);
1043 kmem_cache_free(stateowner_slab, sop);
1046 static inline struct nfs4_stateowner *
1047 alloc_stateowner(struct xdr_netobj *owner)
1049 struct nfs4_stateowner *sop;
1051 if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) {
1052 if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) {
1053 memcpy(sop->so_owner.data, owner->data, owner->len);
1054 sop->so_owner.len = owner->len;
1055 kref_init(&sop->so_ref);
1058 kmem_cache_free(stateowner_slab, sop);
1063 static struct nfs4_stateowner *
1064 alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) {
1065 struct nfs4_stateowner *sop;
1066 struct nfs4_replay *rp;
1067 unsigned int idhashval;
1069 if (!(sop = alloc_stateowner(&open->op_owner)))
1071 idhashval = ownerid_hashval(current_ownerid);
1072 INIT_LIST_HEAD(&sop->so_idhash);
1073 INIT_LIST_HEAD(&sop->so_strhash);
1074 INIT_LIST_HEAD(&sop->so_perclient);
1075 INIT_LIST_HEAD(&sop->so_perfilestate);
1076 INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */
1077 INIT_LIST_HEAD(&sop->so_close_lru);
1079 list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]);
1080 list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]);
1081 list_add(&sop->so_perclient, &clp->cl_perclient);
1082 sop->so_is_open_owner = 1;
1083 sop->so_id = current_ownerid++;
1084 sop->so_client = clp;
1085 sop->so_seqid = open->op_seqid;
1086 sop->so_confirmed = 0;
1087 rp = &sop->so_replay;
1088 rp->rp_status = NFSERR_SERVERFAULT;
1090 rp->rp_buf = rp->rp_ibuf;
1095 release_stateid_lockowners(struct nfs4_stateid *open_stp)
1097 struct nfs4_stateowner *lock_sop;
1099 while (!list_empty(&open_stp->st_perlockowner)) {
1100 lock_sop = list_entry(open_stp->st_perlockowner.next,
1101 struct nfs4_stateowner, so_perlockowner);
1102 /* list_del(&open_stp->st_perlockowner); */
1103 BUG_ON(lock_sop->so_is_open_owner);
1104 release_stateowner(lock_sop);
1109 unhash_stateowner(struct nfs4_stateowner *sop)
1111 struct nfs4_stateid *stp;
1113 list_del(&sop->so_idhash);
1114 list_del(&sop->so_strhash);
1115 if (sop->so_is_open_owner)
1116 list_del(&sop->so_perclient);
1117 list_del(&sop->so_perlockowner);
1118 while (!list_empty(&sop->so_perfilestate)) {
1119 stp = list_entry(sop->so_perfilestate.next,
1120 struct nfs4_stateid, st_perfilestate);
1121 if (sop->so_is_open_owner)
1122 release_stateid(stp, OPEN_STATE);
1124 release_stateid(stp, LOCK_STATE);
1129 release_stateowner(struct nfs4_stateowner *sop)
1131 unhash_stateowner(sop);
1132 list_del(&sop->so_close_lru);
1133 nfs4_put_stateowner(sop);
1137 init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) {
1138 struct nfs4_stateowner *sop = open->op_stateowner;
1139 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
1141 INIT_LIST_HEAD(&stp->st_hash);
1142 INIT_LIST_HEAD(&stp->st_perfilestate);
1143 INIT_LIST_HEAD(&stp->st_perlockowner);
1144 INIT_LIST_HEAD(&stp->st_perfile);
1145 list_add(&stp->st_hash, &stateid_hashtbl[hashval]);
1146 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
1147 list_add(&stp->st_perfile, &fp->fi_stateids);
1148 stp->st_stateowner = sop;
1151 stp->st_stateid.si_boot = boot_time;
1152 stp->st_stateid.si_stateownerid = sop->so_id;
1153 stp->st_stateid.si_fileid = fp->fi_id;
1154 stp->st_stateid.si_generation = 0;
1155 stp->st_access_bmap = 0;
1156 stp->st_deny_bmap = 0;
1157 __set_bit(open->op_share_access, &stp->st_access_bmap);
1158 __set_bit(open->op_share_deny, &stp->st_deny_bmap);
1162 release_stateid(struct nfs4_stateid *stp, int flags)
1164 struct file *filp = stp->st_vfs_file;
1166 list_del(&stp->st_hash);
1167 list_del(&stp->st_perfile);
1168 list_del(&stp->st_perfilestate);
1169 if (flags & OPEN_STATE) {
1170 release_stateid_lockowners(stp);
1171 stp->st_vfs_file = NULL;
1173 } else if (flags & LOCK_STATE)
1174 locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner);
1175 put_nfs4_file(stp->st_file);
1176 kmem_cache_free(stateid_slab, stp);
1181 move_to_close_lru(struct nfs4_stateowner *sop)
1183 dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop);
1185 unhash_stateowner(sop);
1186 list_add_tail(&sop->so_close_lru, &close_lru);
1187 sop->so_time = get_seconds();
1191 release_state_owner(struct nfs4_stateid *stp, int flag)
1193 struct nfs4_stateowner *sop = stp->st_stateowner;
1195 dprintk("NFSD: release_state_owner\n");
1196 release_stateid(stp, flag);
1198 /* place unused nfs4_stateowners on so_close_lru list to be
1199 * released by the laundromat service after the lease period
1200 * to enable us to handle CLOSE replay
1202 if (sop->so_confirmed && list_empty(&sop->so_perfilestate))
1203 move_to_close_lru(sop);
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) {
1241 #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0)
1242 #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0)
1245 set_access(unsigned int *access, unsigned long bmap) {
1249 for (i = 1; i < 4; i++) {
1250 if (test_bit(i, &bmap))
1256 set_deny(unsigned int *deny, unsigned long bmap) {
1260 for (i = 0; i < 4; i++) {
1261 if (test_bit(i, &bmap))
1267 test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) {
1268 unsigned int access, deny;
1270 set_access(&access, stp->st_access_bmap);
1271 set_deny(&deny, stp->st_deny_bmap);
1272 if ((access & open->op_share_deny) || (deny & open->op_share_access))
1278 * Called to check deny when READ with all zero stateid or
1279 * WRITE with all zero or all one stateid
1282 nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
1284 struct inode *ino = current_fh->fh_dentry->d_inode;
1285 struct nfs4_file *fp;
1286 struct nfs4_stateid *stp;
1289 dprintk("NFSD: nfs4_share_conflict\n");
1291 fp = find_file(ino);
1294 ret = nfserr_share_denied;
1295 /* Search for conflicting share reservations */
1296 list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
1297 if (test_bit(deny_type, &stp->st_deny_bmap) ||
1298 test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
1308 nfs4_file_downgrade(struct file *filp, unsigned int share_access)
1310 if (share_access & NFS4_SHARE_ACCESS_WRITE) {
1311 put_write_access(filp->f_dentry->d_inode);
1312 filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE;
1317 * Recall a delegation
1320 do_recall(void *__dp)
1322 struct nfs4_delegation *dp = __dp;
1324 daemonize("nfsv4-recall");
1326 nfsd4_cb_recall(dp);
1331 * Spawn a thread to perform a recall on the delegation represented
1332 * by the lease (file_lock)
1334 * Called from break_lease() with lock_kernel() held.
1335 * Note: we assume break_lease will only call this *once* for any given
1339 void nfsd_break_deleg_cb(struct file_lock *fl)
1341 struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner;
1342 struct task_struct *t;
1344 dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl);
1348 /* We're assuming the state code never drops its reference
1349 * without first removing the lease. Since we're in this lease
1350 * callback (and since the lease code is serialized by the kernel
1351 * lock) we know the server hasn't removed the lease yet, we know
1352 * it's safe to take a reference: */
1353 atomic_inc(&dp->dl_count);
1355 spin_lock(&recall_lock);
1356 list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
1357 spin_unlock(&recall_lock);
1359 /* only place dl_time is set. protected by lock_kernel*/
1360 dp->dl_time = get_seconds();
1362 /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
1363 fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
1365 t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
1367 struct nfs4_client *clp = dp->dl_client;
1369 printk(KERN_INFO "NFSD: Callback thread failed for "
1370 "for client (clientid %08x/%08x)\n",
1371 clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
1372 nfs4_put_delegation(dp);
1377 * The file_lock is being reapd.
1379 * Called by locks_free_lock() with lock_kernel() held.
1382 void nfsd_release_deleg_cb(struct file_lock *fl)
1384 struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
1386 dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count));
1388 if (!(fl->fl_flags & FL_LEASE) || !dp)
1390 dp->dl_flock = NULL;
1394 * Set the delegation file_lock back pointer.
1396 * Called from __setlease() with lock_kernel() held.
1399 void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl)
1401 struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner;
1403 dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp);
1410 * Called from __setlease() with lock_kernel() held
1413 int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try)
1415 struct nfs4_delegation *onlistd =
1416 (struct nfs4_delegation *)onlist->fl_owner;
1417 struct nfs4_delegation *tryd =
1418 (struct nfs4_delegation *)try->fl_owner;
1420 if (onlist->fl_lmops != try->fl_lmops)
1423 return onlistd->dl_client == tryd->dl_client;
1428 int nfsd_change_deleg_cb(struct file_lock **onlist, int arg)
1431 return lease_modify(onlist, arg);
1436 struct lock_manager_operations nfsd_lease_mng_ops = {
1437 .fl_break = nfsd_break_deleg_cb,
1438 .fl_release_private = nfsd_release_deleg_cb,
1439 .fl_copy_lock = nfsd_copy_lock_deleg_cb,
1440 .fl_mylease = nfsd_same_client_deleg_cb,
1441 .fl_change = nfsd_change_deleg_cb,
1446 * nfsd4_process_open1()
1447 * lookup stateowner.
1459 * called with nfs4_lock_state() held.
1462 nfsd4_process_open1(struct nfsd4_open *open)
1465 clientid_t *clientid = &open->op_clientid;
1466 struct nfs4_client *clp = NULL;
1467 unsigned int strhashval;
1468 struct nfs4_stateowner *sop = NULL;
1470 status = nfserr_inval;
1471 if (!check_name(open->op_owner))
1474 if (STALE_CLIENTID(&open->op_clientid))
1475 return nfserr_stale_clientid;
1477 strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner);
1478 sop = find_openstateowner_str(strhashval, open);
1480 open->op_stateowner = sop;
1481 /* check for replay */
1482 if (open->op_seqid == sop->so_seqid){
1483 if (sop->so_replay.rp_buflen)
1484 return NFSERR_REPLAY_ME;
1486 /* The original OPEN failed so spectacularly
1487 * that we don't even have replay data saved!
1488 * Therefore, we have no choice but to continue
1489 * processing this OPEN; presumably, we'll
1490 * fail again for the same reason.
1492 dprintk("nfsd4_process_open1:"
1493 " replay with no replay cache\n");
1496 } else if (sop->so_confirmed) {
1497 if (open->op_seqid == sop->so_seqid + 1)
1499 status = nfserr_bad_seqid;
1502 /* If we get here, we received an OPEN for an
1503 * unconfirmed nfs4_stateowner. Since the seqid's are
1504 * different, purge the existing nfs4_stateowner, and
1505 * instantiate a new one.
1507 clp = sop->so_client;
1508 release_stateowner(sop);
1511 /* nfs4_stateowner not found.
1512 * Verify clientid and instantiate new nfs4_stateowner.
1513 * If verify fails this is presumably the result of the
1514 * client's lease expiring.
1516 status = nfserr_expired;
1517 clp = find_confirmed_client(clientid);
1521 status = nfserr_resource;
1522 sop = alloc_init_open_stateowner(strhashval, clp, open);
1525 open->op_stateowner = sop;
1528 renew_client(sop->so_client);
1530 if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
1531 status = nfserr_reclaim_bad;
1536 nfs4_check_delegmode(struct nfs4_delegation *dp, int flags)
1538 if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ))
1539 return nfserr_openmode;
1544 static struct nfs4_delegation *
1545 find_delegation_file(struct nfs4_file *fp, stateid_t *stid)
1547 struct nfs4_delegation *dp;
1549 list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) {
1550 if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid)
1557 nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open,
1558 struct nfs4_delegation **dp)
1561 int status = nfserr_bad_stateid;
1563 *dp = find_delegation_file(fp, &open->op_delegate_stateid);
1566 flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ?
1567 RD_STATE : WR_STATE;
1568 status = nfs4_check_delegmode(*dp, flags);
1572 if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR)
1576 open->op_stateowner->so_confirmed = 1;
1581 nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp)
1583 struct nfs4_stateid *local;
1584 int status = nfserr_share_denied;
1585 struct nfs4_stateowner *sop = open->op_stateowner;
1587 list_for_each_entry(local, &fp->fi_stateids, st_perfile) {
1588 /* ignore lock owners */
1589 if (local->st_stateowner->so_is_open_owner == 0)
1591 /* remember if we have seen this open owner */
1592 if (local->st_stateowner == sop)
1594 /* check for conflicting share reservations */
1595 if (!test_share(local, open))
1603 static inline struct nfs4_stateid *
1604 nfs4_alloc_stateid(void)
1606 return kmem_cache_alloc(stateid_slab, GFP_KERNEL);
1610 nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp,
1611 struct nfs4_delegation *dp,
1612 struct svc_fh *cur_fh, int flags)
1614 struct nfs4_stateid *stp;
1616 stp = nfs4_alloc_stateid();
1618 return nfserr_resource;
1621 get_file(dp->dl_vfs_file);
1622 stp->st_vfs_file = dp->dl_vfs_file;
1625 status = nfsd_open(rqstp, cur_fh, S_IFREG, flags,
1628 if (status == nfserr_dropit)
1629 status = nfserr_jukebox;
1630 kmem_cache_free(stateid_slab, stp);
1639 nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
1640 struct nfsd4_open *open)
1642 struct iattr iattr = {
1643 .ia_valid = ATTR_SIZE,
1646 if (!open->op_truncate)
1648 if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
1650 return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0);
1654 nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open)
1656 struct file *filp = stp->st_vfs_file;
1657 struct inode *inode = filp->f_dentry->d_inode;
1658 unsigned int share_access;
1661 set_access(&share_access, stp->st_access_bmap);
1662 share_access = ~share_access;
1663 share_access &= open->op_share_access;
1665 if (!(share_access & NFS4_SHARE_ACCESS_WRITE))
1666 return nfsd4_truncate(rqstp, cur_fh, open);
1668 status = get_write_access(inode);
1670 return nfserrno(status);
1671 status = nfsd4_truncate(rqstp, cur_fh, open);
1673 put_write_access(inode);
1676 /* remember the open */
1677 filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ;
1678 set_bit(open->op_share_access, &stp->st_access_bmap);
1679 set_bit(open->op_share_deny, &stp->st_deny_bmap);
1685 /* decrement seqid on successful reclaim, it will be bumped in encode_open */
1687 nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
1689 if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) {
1691 *status = nfserr_reclaim_bad;
1693 open->op_stateowner->so_confirmed = 1;
1694 open->op_stateowner->so_seqid--;
1700 * Attempt to hand out a delegation.
1703 nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp)
1705 struct nfs4_delegation *dp;
1706 struct nfs4_stateowner *sop = stp->st_stateowner;
1707 struct nfs4_callback *cb = &sop->so_client->cl_callback;
1708 struct file_lock fl, *flp = &fl;
1709 int status, flag = 0;
1711 flag = NFS4_OPEN_DELEGATE_NONE;
1712 if (open->op_claim_type != NFS4_OPEN_CLAIM_NULL
1713 || !atomic_read(&cb->cb_set) || !sop->so_confirmed)
1716 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1717 flag = NFS4_OPEN_DELEGATE_WRITE;
1719 flag = NFS4_OPEN_DELEGATE_READ;
1721 dp = alloc_init_deleg(sop->so_client, stp, fh, flag);
1723 flag = NFS4_OPEN_DELEGATE_NONE;
1726 locks_init_lock(&fl);
1727 fl.fl_lmops = &nfsd_lease_mng_ops;
1728 fl.fl_flags = FL_LEASE;
1729 fl.fl_end = OFFSET_MAX;
1730 fl.fl_owner = (fl_owner_t)dp;
1731 fl.fl_file = stp->st_vfs_file;
1732 fl.fl_pid = current->tgid;
1734 /* setlease checks to see if delegation should be handed out.
1735 * the lock_manager callbacks fl_mylease and fl_change are used
1737 if ((status = setlease(stp->st_vfs_file,
1738 flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) {
1739 dprintk("NFSD: setlease failed [%d], no delegation\n", status);
1740 unhash_delegation(dp);
1741 flag = NFS4_OPEN_DELEGATE_NONE;
1745 memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid));
1747 dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n",
1748 dp->dl_stateid.si_boot,
1749 dp->dl_stateid.si_stateownerid,
1750 dp->dl_stateid.si_fileid,
1751 dp->dl_stateid.si_generation);
1753 open->op_delegate_type = flag;
1757 * called with nfs4_lock_state() held.
1760 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
1762 struct nfs4_file *fp = NULL;
1763 struct inode *ino = current_fh->fh_dentry->d_inode;
1764 struct nfs4_stateid *stp = NULL;
1765 struct nfs4_delegation *dp = NULL;
1768 status = nfserr_inval;
1769 if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny))
1772 * Lookup file; if found, lookup stateid and check open request,
1773 * and check for delegations in the process of being recalled.
1774 * If not found, create the nfs4_file struct
1776 fp = find_file(ino);
1778 if ((status = nfs4_check_open(fp, open, &stp)))
1780 status = nfs4_check_deleg(fp, open, &dp);
1784 status = nfserr_bad_stateid;
1785 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
1787 status = nfserr_resource;
1788 fp = alloc_init_file(ino);
1794 * OPEN the file, or upgrade an existing OPEN.
1795 * If truncate fails, the OPEN fails.
1798 /* Stateid was found, this is an OPEN upgrade */
1799 status = nfs4_upgrade_open(rqstp, current_fh, stp, open);
1803 /* Stateid was not found, this is a new OPEN */
1805 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
1809 status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags);
1812 init_stateid(stp, fp, open);
1813 status = nfsd4_truncate(rqstp, current_fh, open);
1815 release_stateid(stp, OPEN_STATE);
1819 memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t));
1822 * Attempt to hand out a delegation. No error return, because the
1823 * OPEN succeeds even if we fail.
1825 nfs4_open_delegation(current_fh, open, stp);
1829 dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n",
1830 stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid,
1831 stp->st_stateid.si_fileid, stp->st_stateid.si_generation);
1835 /* CLAIM_PREVIOUS has different error returns */
1836 nfs4_set_claim_prev(open, &status);
1838 * To finish the open response, we just need to set the rflags.
1840 open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX;
1841 if (!open->op_stateowner->so_confirmed)
1842 open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
1847 static struct workqueue_struct *laundry_wq;
1848 static struct work_struct laundromat_work;
1849 static void laundromat_main(void *);
1850 static DECLARE_WORK(laundromat_work, laundromat_main, NULL);
1853 nfsd4_renew(clientid_t *clid)
1855 struct nfs4_client *clp;
1859 dprintk("process_renew(%08x/%08x): starting\n",
1860 clid->cl_boot, clid->cl_id);
1861 status = nfserr_stale_clientid;
1862 if (STALE_CLIENTID(clid))
1864 clp = find_confirmed_client(clid);
1865 status = nfserr_expired;
1867 /* We assume the client took too long to RENEW. */
1868 dprintk("nfsd4_renew: clientid not found!\n");
1872 status = nfserr_cb_path_down;
1873 if (!list_empty(&clp->cl_del_perclnt)
1874 && !atomic_read(&clp->cl_callback.cb_set))
1878 nfs4_unlock_state();
1883 nfs4_laundromat(void)
1885 struct nfs4_client *clp;
1886 struct nfs4_stateowner *sop;
1887 struct nfs4_delegation *dp;
1888 struct list_head *pos, *next, reaplist;
1889 time_t cutoff = get_seconds() - NFSD_LEASE_TIME;
1890 time_t t, clientid_val = NFSD_LEASE_TIME;
1891 time_t u, test_val = NFSD_LEASE_TIME;
1895 dprintk("NFSD: laundromat service - starting\n");
1896 list_for_each_safe(pos, next, &client_lru) {
1897 clp = list_entry(pos, struct nfs4_client, cl_lru);
1898 if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) {
1899 t = clp->cl_time - cutoff;
1900 if (clientid_val > t)
1904 dprintk("NFSD: purging unused client (clientid %08x)\n",
1905 clp->cl_clientid.cl_id);
1908 INIT_LIST_HEAD(&reaplist);
1909 spin_lock(&recall_lock);
1910 list_for_each_safe(pos, next, &del_recall_lru) {
1911 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1912 if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) {
1913 u = dp->dl_time - cutoff;
1918 dprintk("NFSD: purging unused delegation dp %p, fp %p\n",
1920 list_move(&dp->dl_recall_lru, &reaplist);
1922 spin_unlock(&recall_lock);
1923 list_for_each_safe(pos, next, &reaplist) {
1924 dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
1925 list_del_init(&dp->dl_recall_lru);
1926 unhash_delegation(dp);
1928 test_val = NFSD_LEASE_TIME;
1929 list_for_each_safe(pos, next, &close_lru) {
1930 sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
1931 if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) {
1932 u = sop->so_time - cutoff;
1937 dprintk("NFSD: purging unused open stateowner (so_id %d)\n",
1939 list_del(&sop->so_close_lru);
1940 nfs4_put_stateowner(sop);
1942 if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT)
1943 clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT;
1944 nfs4_unlock_state();
1945 return clientid_val;
1949 laundromat_main(void *not_used)
1953 t = nfs4_laundromat();
1954 dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t);
1955 queue_delayed_work(laundry_wq, &laundromat_work, t*HZ);
1958 /* search ownerid_hashtbl[] and close_lru for stateid owner
1959 * (stateid->si_stateownerid)
1961 struct nfs4_stateowner *
1962 find_openstateowner_id(u32 st_id, int flags) {
1963 struct nfs4_stateowner *local = NULL;
1965 dprintk("NFSD: find_openstateowner_id %d\n", st_id);
1966 if (flags & CLOSE_STATE) {
1967 list_for_each_entry(local, &close_lru, so_close_lru) {
1968 if (local->so_id == st_id)
1976 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
1978 return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode;
1982 STALE_STATEID(stateid_t *stateid)
1984 if (stateid->si_boot == boot_time)
1986 printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n",
1987 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
1988 stateid->si_generation);
1993 access_permit_read(unsigned long access_bmap)
1995 return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
1996 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
1997 test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
2001 access_permit_write(unsigned long access_bmap)
2003 return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
2004 test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
2008 int nfs4_check_openmode(struct nfs4_stateid *stp, int flags)
2010 int status = nfserr_openmode;
2012 if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
2014 if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
2022 check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags)
2024 /* Trying to call delegreturn with a special stateid? Yuch: */
2025 if (!(flags & (RD_STATE | WR_STATE)))
2026 return nfserr_bad_stateid;
2027 else if (ONE_STATEID(stateid) && (flags & RD_STATE))
2029 else if (nfs4_in_grace()) {
2030 /* Answer in remaining cases depends on existance of
2031 * conflicting state; so we must wait out the grace period. */
2032 return nfserr_grace;
2033 } else if (flags & WR_STATE)
2034 return nfs4_share_conflict(current_fh,
2035 NFS4_SHARE_DENY_WRITE);
2036 else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */
2037 return nfs4_share_conflict(current_fh,
2038 NFS4_SHARE_DENY_READ);
2042 * Allow READ/WRITE during grace period on recovered state only for files
2043 * that are not able to provide mandatory locking.
2046 io_during_grace_disallowed(struct inode *inode, int flags)
2048 return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
2049 && MANDATORY_LOCK(inode);
2053 * Checks for stateid operations
2056 nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp)
2058 struct nfs4_stateid *stp = NULL;
2059 struct nfs4_delegation *dp = NULL;
2061 struct inode *ino = current_fh->fh_dentry->d_inode;
2064 dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n",
2065 stateid->si_boot, stateid->si_stateownerid,
2066 stateid->si_fileid, stateid->si_generation);
2070 if (io_during_grace_disallowed(ino, flags))
2071 return nfserr_grace;
2073 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
2074 return check_special_stateids(current_fh, stateid, flags);
2077 status = nfserr_stale_stateid;
2078 if (STALE_STATEID(stateid))
2082 status = nfserr_bad_stateid;
2083 if (!stateid->si_fileid) { /* delegation stateid */
2084 if(!(dp = find_delegation_stateid(ino, stateid))) {
2085 dprintk("NFSD: delegation stateid not found\n");
2086 if (nfs4_in_grace())
2087 status = nfserr_grace;
2090 stidp = &dp->dl_stateid;
2091 } else { /* open or lock stateid */
2092 if (!(stp = find_stateid(stateid, flags))) {
2093 dprintk("NFSD: open or lock stateid not found\n");
2094 if (nfs4_in_grace())
2095 status = nfserr_grace;
2098 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp))
2100 if (!stp->st_stateowner->so_confirmed)
2102 stidp = &stp->st_stateid;
2104 if (stateid->si_generation > stidp->si_generation)
2108 status = nfserr_old_stateid;
2109 if (stateid->si_generation < stidp->si_generation)
2112 if ((status = nfs4_check_openmode(stp,flags)))
2114 renew_client(stp->st_stateowner->so_client);
2116 *filpp = stp->st_vfs_file;
2118 if ((status = nfs4_check_delegmode(dp, flags)))
2120 renew_client(dp->dl_client);
2121 if (flags & DELEG_RET)
2122 unhash_delegation(dp);
2124 *filpp = dp->dl_vfs_file;
2133 * Checks for sequence id mutating operations.
2136 nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid)
2139 struct nfs4_stateid *stp;
2140 struct nfs4_stateowner *sop;
2142 dprintk("NFSD: preprocess_seqid_op: seqid=%d "
2143 "stateid = (%08x/%08x/%08x/%08x)\n", seqid,
2144 stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid,
2145 stateid->si_generation);
2150 status = nfserr_bad_stateid;
2151 if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
2152 printk("NFSD: preprocess_seqid_op: magic stateid!\n");
2156 status = nfserr_stale_stateid;
2157 if (STALE_STATEID(stateid))
2160 * We return BAD_STATEID if filehandle doesn't match stateid,
2161 * the confirmed flag is incorrecly set, or the generation
2162 * number is incorrect.
2163 * If there is no entry in the openfile table for this id,
2164 * we can't always return BAD_STATEID;
2165 * this might be a retransmitted CLOSE which has arrived after
2166 * the openfile has been released.
2168 if (!(stp = find_stateid(stateid, flags)))
2169 goto no_nfs4_stateid;
2171 status = nfserr_bad_stateid;
2173 /* for new lock stateowners:
2174 * check that the lock->v.new.open_stateid
2175 * refers to an open stateowner
2177 * check that the lockclid (nfs4_lock->v.new.clientid) is the same
2178 * as the open_stateid->st_stateowner->so_client->clientid
2181 struct nfs4_stateowner *sop = stp->st_stateowner;
2182 struct nfs4_client *clp = sop->so_client;
2184 if (!sop->so_is_open_owner)
2186 if (!cmp_clid(&clp->cl_clientid, lockclid))
2190 if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) {
2191 printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
2196 *sopp = sop = stp->st_stateowner;
2199 * We now validate the seqid and stateid generation numbers.
2200 * For the moment, we ignore the possibility of
2201 * generation number wraparound.
2203 if (seqid != sop->so_seqid + 1)
2206 if (sop->so_confirmed) {
2207 if (flags & CONFIRM) {
2208 printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n");
2213 if (!(flags & CONFIRM)) {
2214 printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n");
2218 if (stateid->si_generation > stp->st_stateid.si_generation) {
2219 printk("NFSD: preprocess_seqid_op: future stateid?!\n");
2223 status = nfserr_old_stateid;
2224 if (stateid->si_generation < stp->st_stateid.si_generation) {
2225 printk("NFSD: preprocess_seqid_op: old stateid!\n");
2228 /* XXX renew the client lease here */
2237 * We determine whether this is a bad stateid or a replay,
2238 * starting by trying to look up the stateowner.
2239 * If stateowner is not found - stateid is bad.
2241 if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) {
2242 printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n");
2243 status = nfserr_bad_stateid;
2249 if (seqid == sop->so_seqid) {
2250 printk("NFSD: preprocess_seqid_op: retransmission?\n");
2251 /* indicate replay to calling function */
2252 status = NFSERR_REPLAY_ME;
2254 printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid);
2257 status = nfserr_bad_seqid;
2263 nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc)
2266 struct nfs4_stateowner *sop;
2267 struct nfs4_stateid *stp;
2269 dprintk("NFSD: nfsd4_open_confirm on file %.*s\n",
2270 (int)current_fh->fh_dentry->d_name.len,
2271 current_fh->fh_dentry->d_name.name);
2273 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2278 if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid,
2279 &oc->oc_req_stateid,
2280 CHECK_FH | CONFIRM | OPEN_STATE,
2281 &oc->oc_stateowner, &stp, NULL)))
2284 sop = oc->oc_stateowner;
2285 sop->so_confirmed = 1;
2286 update_stateid(&stp->st_stateid);
2287 memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t));
2288 dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d "
2289 "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid,
2290 stp->st_stateid.si_boot,
2291 stp->st_stateid.si_stateownerid,
2292 stp->st_stateid.si_fileid,
2293 stp->st_stateid.si_generation);
2295 if (oc->oc_stateowner)
2296 nfs4_get_stateowner(oc->oc_stateowner);
2297 nfs4_unlock_state();
2303 * unset all bits in union bitmap (bmap) that
2304 * do not exist in share (from successful OPEN_DOWNGRADE)
2307 reset_union_bmap_access(unsigned long access, unsigned long *bmap)
2310 for (i = 1; i < 4; i++) {
2311 if ((i & access) != i)
2312 __clear_bit(i, bmap);
2317 reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
2320 for (i = 0; i < 4; i++) {
2321 if ((i & deny) != i)
2322 __clear_bit(i, bmap);
2327 nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od)
2330 struct nfs4_stateid *stp;
2331 unsigned int share_access;
2333 dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n",
2334 (int)current_fh->fh_dentry->d_name.len,
2335 current_fh->fh_dentry->d_name.name);
2337 if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny))
2338 return nfserr_inval;
2341 if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid,
2343 CHECK_FH | OPEN_STATE,
2344 &od->od_stateowner, &stp, NULL)))
2347 status = nfserr_inval;
2348 if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
2349 dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
2350 stp->st_access_bmap, od->od_share_access);
2353 if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
2354 dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
2355 stp->st_deny_bmap, od->od_share_deny);
2358 set_access(&share_access, stp->st_access_bmap);
2359 nfs4_file_downgrade(stp->st_vfs_file,
2360 share_access & ~od->od_share_access);
2362 reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap);
2363 reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
2365 update_stateid(&stp->st_stateid);
2366 memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t));
2369 if (od->od_stateowner)
2370 nfs4_get_stateowner(od->od_stateowner);
2371 nfs4_unlock_state();
2376 * nfs4_unlock_state() called after encode
2379 nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close)
2382 struct nfs4_stateid *stp;
2384 dprintk("NFSD: nfsd4_close on file %.*s\n",
2385 (int)current_fh->fh_dentry->d_name.len,
2386 current_fh->fh_dentry->d_name.name);
2389 /* check close_lru for replay */
2390 if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid,
2392 CHECK_FH | OPEN_STATE | CLOSE_STATE,
2393 &close->cl_stateowner, &stp, NULL)))
2396 * Return success, but first update the stateid.
2399 update_stateid(&stp->st_stateid);
2400 memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t));
2402 /* release_state_owner() calls nfsd_close() if needed */
2403 release_state_owner(stp, OPEN_STATE);
2405 if (close->cl_stateowner)
2406 nfs4_get_stateowner(close->cl_stateowner);
2407 nfs4_unlock_state();
2412 nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr)
2416 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0)))
2420 status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL);
2421 nfs4_unlock_state();
2428 * Lock owner state (byte-range locks)
2430 #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start))
2431 #define LOCK_HASH_BITS 8
2432 #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS)
2433 #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1)
2435 #define lockownerid_hashval(id) \
2436 ((id) & LOCK_HASH_MASK)
2438 static inline unsigned int
2439 lock_ownerstr_hashval(struct inode *inode, u32 cl_id,
2440 struct xdr_netobj *ownername)
2442 return (file_hashval(inode) + cl_id
2443 + opaque_hashval(ownername->data, ownername->len))
2447 static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE];
2448 static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE];
2449 static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE];
2451 struct nfs4_stateid *
2452 find_stateid(stateid_t *stid, int flags)
2454 struct nfs4_stateid *local = NULL;
2455 u32 st_id = stid->si_stateownerid;
2456 u32 f_id = stid->si_fileid;
2457 unsigned int hashval;
2459 dprintk("NFSD: find_stateid flags 0x%x\n",flags);
2460 if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2461 hashval = stateid_hashval(st_id, f_id);
2462 list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) {
2463 if ((local->st_stateid.si_stateownerid == st_id) &&
2464 (local->st_stateid.si_fileid == f_id))
2468 if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) {
2469 hashval = stateid_hashval(st_id, f_id);
2470 list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) {
2471 if ((local->st_stateid.si_stateownerid == st_id) &&
2472 (local->st_stateid.si_fileid == f_id))
2476 printk("NFSD: find_stateid: ERROR: no state flag\n");
2480 static struct nfs4_delegation *
2481 find_delegation_stateid(struct inode *ino, stateid_t *stid)
2483 struct nfs4_file *fp;
2484 struct nfs4_delegation *dl;
2486 dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n",
2487 stid->si_boot, stid->si_stateownerid,
2488 stid->si_fileid, stid->si_generation);
2490 fp = find_file(ino);
2493 dl = find_delegation_file(fp, stid);
2499 * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that
2500 * we can't properly handle lock requests that go beyond the (2^63 - 1)-th
2501 * byte, because of sign extension problems. Since NFSv4 calls for 64-bit
2502 * locking, this prevents us from being completely protocol-compliant. The
2503 * real solution to this problem is to start using unsigned file offsets in
2504 * the VFS, but this is a very deep change!
2507 nfs4_transform_lock_offset(struct file_lock *lock)
2509 if (lock->fl_start < 0)
2510 lock->fl_start = OFFSET_MAX;
2511 if (lock->fl_end < 0)
2512 lock->fl_end = OFFSET_MAX;
2516 nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval)
2518 struct nfs4_stateowner *local = NULL;
2521 if (hashval >= LOCK_HASH_SIZE)
2523 list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) {
2535 nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
2537 struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner;
2538 unsigned int hval = lockownerid_hashval(sop->so_id);
2540 deny->ld_sop = NULL;
2541 if (nfs4_verify_lock_stateowner(sop, hval)) {
2542 kref_get(&sop->so_ref);
2544 deny->ld_clientid = sop->so_client->cl_clientid;
2546 deny->ld_start = fl->fl_start;
2547 deny->ld_length = ~(u64)0;
2548 if (fl->fl_end != ~(u64)0)
2549 deny->ld_length = fl->fl_end - fl->fl_start + 1;
2550 deny->ld_type = NFS4_READ_LT;
2551 if (fl->fl_type != F_RDLCK)
2552 deny->ld_type = NFS4_WRITE_LT;
2555 static struct nfs4_stateowner *
2556 find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid)
2558 struct nfs4_stateowner *local = NULL;
2561 for (i = 0; i < LOCK_HASH_SIZE; i++) {
2562 list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) {
2563 if (!cmp_owner_str(local, owner, clid))
2571 static struct nfs4_stateowner *
2572 find_lockstateowner_str(struct inode *inode, clientid_t *clid,
2573 struct xdr_netobj *owner)
2575 unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
2576 struct nfs4_stateowner *op;
2578 list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
2579 if (cmp_owner_str(op, owner, clid))
2586 * Alloc a lock owner structure.
2587 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has
2590 * strhashval = lock_ownerstr_hashval
2591 * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode
2594 static struct nfs4_stateowner *
2595 alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) {
2596 struct nfs4_stateowner *sop;
2597 struct nfs4_replay *rp;
2598 unsigned int idhashval;
2600 if (!(sop = alloc_stateowner(&lock->lk_new_owner)))
2602 idhashval = lockownerid_hashval(current_ownerid);
2603 INIT_LIST_HEAD(&sop->so_idhash);
2604 INIT_LIST_HEAD(&sop->so_strhash);
2605 INIT_LIST_HEAD(&sop->so_perclient);
2606 INIT_LIST_HEAD(&sop->so_perfilestate);
2607 INIT_LIST_HEAD(&sop->so_perlockowner);
2608 INIT_LIST_HEAD(&sop->so_close_lru); /* not used */
2610 list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]);
2611 list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]);
2612 list_add(&sop->so_perlockowner, &open_stp->st_perlockowner);
2613 sop->so_is_open_owner = 0;
2614 sop->so_id = current_ownerid++;
2615 sop->so_client = clp;
2616 sop->so_seqid = lock->lk_new_lock_seqid - 1;
2617 sop->so_confirmed = 1;
2618 rp = &sop->so_replay;
2619 rp->rp_status = NFSERR_SERVERFAULT;
2621 rp->rp_buf = rp->rp_ibuf;
2625 struct nfs4_stateid *
2626 alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp)
2628 struct nfs4_stateid *stp;
2629 unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id);
2631 stp = nfs4_alloc_stateid();
2634 INIT_LIST_HEAD(&stp->st_hash);
2635 INIT_LIST_HEAD(&stp->st_perfile);
2636 INIT_LIST_HEAD(&stp->st_perfilestate);
2637 INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */
2638 list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]);
2639 list_add(&stp->st_perfile, &fp->fi_stateids);
2640 list_add(&stp->st_perfilestate, &sop->so_perfilestate);
2641 stp->st_stateowner = sop;
2644 stp->st_stateid.si_boot = boot_time;
2645 stp->st_stateid.si_stateownerid = sop->so_id;
2646 stp->st_stateid.si_fileid = fp->fi_id;
2647 stp->st_stateid.si_generation = 0;
2648 stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */
2649 stp->st_access_bmap = open_stp->st_access_bmap;
2650 stp->st_deny_bmap = open_stp->st_deny_bmap;
2657 check_lock_length(u64 offset, u64 length)
2659 return ((length == 0) || ((length != ~(u64)0) &&
2660 LOFF_OVERFLOW(offset, length)));
2667 nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock)
2669 struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL;
2670 struct nfs4_stateid *lock_stp;
2672 struct file_lock file_lock;
2673 struct file_lock *conflock;
2675 unsigned int strhashval;
2677 dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n",
2678 (long long) lock->lk_offset,
2679 (long long) lock->lk_length);
2681 if (nfs4_in_grace() && !lock->lk_reclaim)
2682 return nfserr_grace;
2683 if (!nfs4_in_grace() && lock->lk_reclaim)
2684 return nfserr_no_grace;
2686 if (check_lock_length(lock->lk_offset, lock->lk_length))
2687 return nfserr_inval;
2691 if (lock->lk_is_new) {
2693 * Client indicates that this is a new lockowner.
2694 * Use open owner and open stateid to create lock owner and lock
2697 struct nfs4_stateid *open_stp = NULL;
2698 struct nfs4_file *fp;
2700 status = nfserr_stale_clientid;
2701 if (STALE_CLIENTID(&lock->lk_new_clientid)) {
2702 printk("NFSD: nfsd4_lock: clientid is stale!\n");
2706 /* is the new lock seqid presented by the client zero? */
2707 status = nfserr_bad_seqid;
2708 if (lock->v.new.lock_seqid != 0)
2711 /* validate and update open stateid and open seqid */
2712 status = nfs4_preprocess_seqid_op(current_fh,
2713 lock->lk_new_open_seqid,
2714 &lock->lk_new_open_stateid,
2715 CHECK_FH | OPEN_STATE,
2716 &open_sop, &open_stp,
2717 &lock->v.new.clientid);
2719 if (lock->lk_reclaim)
2720 status = nfserr_reclaim_bad;
2723 /* create lockowner and lock stateid */
2724 fp = open_stp->st_file;
2725 strhashval = lock_ownerstr_hashval(fp->fi_inode,
2726 open_sop->so_client->cl_clientid.cl_id,
2727 &lock->v.new.owner);
2729 * If we already have this lock owner, the client is in
2730 * error (or our bookeeping is wrong!)
2731 * for asking for a 'new lock'.
2733 status = nfserr_bad_stateid;
2734 lock_sop = find_lockstateowner(&lock->v.new.owner,
2735 &lock->v.new.clientid);
2738 status = nfserr_resource;
2739 if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock)))
2741 if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner,
2742 fp, open_stp)) == NULL) {
2743 release_stateowner(lock->lk_stateowner);
2744 lock->lk_stateowner = NULL;
2747 /* bump the open seqid used to create the lock */
2748 open_sop->so_seqid++;
2750 /* lock (lock owner + lock stateid) already exists */
2751 status = nfs4_preprocess_seqid_op(current_fh,
2752 lock->lk_old_lock_seqid,
2753 &lock->lk_old_lock_stateid,
2754 CHECK_FH | LOCK_STATE,
2755 &lock->lk_stateowner, &lock_stp, NULL);
2759 /* lock->lk_stateowner and lock_stp have been created or found */
2760 filp = lock_stp->st_vfs_file;
2762 if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) {
2763 printk("NFSD: nfsd4_lock: permission denied!\n");
2767 locks_init_lock(&file_lock);
2768 switch (lock->lk_type) {
2771 file_lock.fl_type = F_RDLCK;
2774 case NFS4_WRITEW_LT:
2775 file_lock.fl_type = F_WRLCK;
2778 status = nfserr_inval;
2781 file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner;
2782 file_lock.fl_pid = current->tgid;
2783 file_lock.fl_file = filp;
2784 file_lock.fl_flags = FL_POSIX;
2786 file_lock.fl_start = lock->lk_offset;
2787 if ((lock->lk_length == ~(u64)0) ||
2788 LOFF_OVERFLOW(lock->lk_offset, lock->lk_length))
2789 file_lock.fl_end = ~(u64)0;
2791 file_lock.fl_end = lock->lk_offset + lock->lk_length - 1;
2792 nfs4_transform_lock_offset(&file_lock);
2795 * Try to lock the file in the VFS.
2796 * Note: locks.c uses the BKL to protect the inode's lock list.
2799 status = posix_lock_file(filp, &file_lock);
2800 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2801 file_lock.fl_ops->fl_release_private(&file_lock);
2802 dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status);
2804 case 0: /* success! */
2805 update_stateid(&lock_stp->st_stateid);
2806 memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid,
2810 goto conflicting_lock;
2812 status = nfserr_deadlock;
2814 dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status);
2815 goto out_destroy_new_stateid;
2819 dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
2820 status = nfserr_denied;
2821 /* XXX There is a race here. Future patch needed to provide
2822 * an atomic posix_lock_and_test_file
2824 if (!(conflock = posix_test_lock(filp, &file_lock))) {
2825 status = nfserr_serverfault;
2828 nfs4_set_lock_denied(conflock, &lock->lk_denied);
2830 out_destroy_new_stateid:
2831 if (lock->lk_is_new) {
2832 dprintk("NFSD: nfsd4_lock: destroy new stateid!\n");
2834 * An error encountered after instantiation of the new
2835 * stateid has forced us to destroy it.
2837 if (!seqid_mutating_err(status))
2838 open_sop->so_seqid--;
2840 release_state_owner(lock_stp, LOCK_STATE);
2843 if (lock->lk_stateowner)
2844 nfs4_get_stateowner(lock->lk_stateowner);
2845 nfs4_unlock_state();
2853 nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt)
2855 struct inode *inode;
2857 struct file_lock file_lock;
2858 struct file_lock *conflicting_lock;
2861 if (nfs4_in_grace())
2862 return nfserr_grace;
2864 if (check_lock_length(lockt->lt_offset, lockt->lt_length))
2865 return nfserr_inval;
2867 lockt->lt_stateowner = NULL;
2870 status = nfserr_stale_clientid;
2871 if (STALE_CLIENTID(&lockt->lt_clientid)) {
2872 printk("NFSD: nfsd4_lockt: clientid is stale!\n");
2876 if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) {
2877 printk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
2878 if (status == nfserr_symlink)
2879 status = nfserr_inval;
2883 inode = current_fh->fh_dentry->d_inode;
2884 locks_init_lock(&file_lock);
2885 switch (lockt->lt_type) {
2888 file_lock.fl_type = F_RDLCK;
2891 case NFS4_WRITEW_LT:
2892 file_lock.fl_type = F_WRLCK;
2895 printk("NFSD: nfs4_lockt: bad lock type!\n");
2896 status = nfserr_inval;
2900 lockt->lt_stateowner = find_lockstateowner_str(inode,
2901 &lockt->lt_clientid, &lockt->lt_owner);
2902 if (lockt->lt_stateowner)
2903 file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner;
2904 file_lock.fl_pid = current->tgid;
2905 file_lock.fl_flags = FL_POSIX;
2907 file_lock.fl_start = lockt->lt_offset;
2908 if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length))
2909 file_lock.fl_end = ~(u64)0;
2911 file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1;
2913 nfs4_transform_lock_offset(&file_lock);
2915 /* posix_test_lock uses the struct file _only_ to resolve the inode.
2916 * since LOCKT doesn't require an OPEN, and therefore a struct
2917 * file may not exist, pass posix_test_lock a struct file with
2918 * only the dentry:inode set.
2920 memset(&file, 0, sizeof (struct file));
2921 file.f_dentry = current_fh->fh_dentry;
2924 conflicting_lock = posix_test_lock(&file, &file_lock);
2925 if (conflicting_lock) {
2926 status = nfserr_denied;
2927 nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied);
2930 nfs4_unlock_state();
2935 nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku)
2937 struct nfs4_stateid *stp;
2938 struct file *filp = NULL;
2939 struct file_lock file_lock;
2942 dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n",
2943 (long long) locku->lu_offset,
2944 (long long) locku->lu_length);
2946 if (check_lock_length(locku->lu_offset, locku->lu_length))
2947 return nfserr_inval;
2951 if ((status = nfs4_preprocess_seqid_op(current_fh,
2954 CHECK_FH | LOCK_STATE,
2955 &locku->lu_stateowner, &stp, NULL)))
2958 filp = stp->st_vfs_file;
2960 locks_init_lock(&file_lock);
2961 file_lock.fl_type = F_UNLCK;
2962 file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner;
2963 file_lock.fl_pid = current->tgid;
2964 file_lock.fl_file = filp;
2965 file_lock.fl_flags = FL_POSIX;
2966 file_lock.fl_start = locku->lu_offset;
2968 if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length))
2969 file_lock.fl_end = ~(u64)0;
2971 file_lock.fl_end = locku->lu_offset + locku->lu_length - 1;
2972 nfs4_transform_lock_offset(&file_lock);
2975 * Try to unlock the file in the VFS.
2977 status = posix_lock_file(filp, &file_lock);
2978 if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private)
2979 file_lock.fl_ops->fl_release_private(&file_lock);
2981 printk("NFSD: nfs4_locku: posix_lock_file failed!\n");
2985 * OK, unlock succeeded; the only thing left to do is update the stateid.
2987 update_stateid(&stp->st_stateid);
2988 memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t));
2991 if (locku->lu_stateowner)
2992 nfs4_get_stateowner(locku->lu_stateowner);
2993 nfs4_unlock_state();
2997 status = nfserrno(status);
3003 * 1: locks held by lockowner
3004 * 0: no locks held by lockowner
3007 check_for_locks(struct file *filp, struct nfs4_stateowner *lowner)
3009 struct file_lock **flpp;
3010 struct inode *inode = filp->f_dentry->d_inode;
3014 for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) {
3015 if ((*flpp)->fl_owner == (fl_owner_t)lowner)
3025 nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
3027 clientid_t *clid = &rlockowner->rl_clientid;
3028 struct nfs4_stateowner *local = NULL;
3029 struct xdr_netobj *owner = &rlockowner->rl_owner;
3032 dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
3033 clid->cl_boot, clid->cl_id);
3035 /* XXX check for lease expiration */
3037 status = nfserr_stale_clientid;
3038 if (STALE_CLIENTID(clid)) {
3039 printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n");
3046 local = find_lockstateowner(owner, clid);
3048 struct nfs4_stateid *stp;
3050 /* check for any locks held by any stateid
3051 * associated with the (lock) stateowner */
3052 status = nfserr_locks_held;
3053 list_for_each_entry(stp, &local->so_perfilestate,
3055 if (check_for_locks(stp->st_vfs_file, local))
3058 /* no locks held by (lock) stateowner */
3060 release_stateowner(local);
3063 nfs4_unlock_state();
3067 static inline struct nfs4_client_reclaim *
3068 alloc_reclaim(int namelen)
3070 struct nfs4_client_reclaim *crp = NULL;
3072 crp = kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
3075 crp->cr_name.data = kmalloc(namelen, GFP_KERNEL);
3076 if (!crp->cr_name.data) {
3084 * failure => all reset bets are off, nfserr_no_grace...
3087 nfs4_client_to_reclaim(char *name, int namlen)
3089 unsigned int strhashval;
3090 struct nfs4_client_reclaim *crp = NULL;
3092 dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", namlen, name);
3093 crp = alloc_reclaim(namlen);
3096 strhashval = clientstr_hashval(name, namlen);
3097 INIT_LIST_HEAD(&crp->cr_strhash);
3098 list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]);
3099 memcpy(crp->cr_name.data, name, namlen);
3100 crp->cr_name.len = namlen;
3101 reclaim_str_hashtbl_size++;
3106 nfs4_release_reclaim(void)
3108 struct nfs4_client_reclaim *crp = NULL;
3111 BUG_ON(!nfs4_reclaim_init);
3112 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3113 while (!list_empty(&reclaim_str_hashtbl[i])) {
3114 crp = list_entry(reclaim_str_hashtbl[i].next,
3115 struct nfs4_client_reclaim, cr_strhash);
3116 list_del(&crp->cr_strhash);
3117 kfree(crp->cr_name.data);
3119 reclaim_str_hashtbl_size--;
3122 BUG_ON(reclaim_str_hashtbl_size);
3126 * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
3127 struct nfs4_client_reclaim *
3128 nfs4_find_reclaim_client(clientid_t *clid)
3130 unsigned int strhashval;
3131 struct nfs4_client *clp;
3132 struct nfs4_client_reclaim *crp = NULL;
3135 /* find clientid in conf_id_hashtbl */
3136 clp = find_confirmed_client(clid);
3140 dprintk("NFSD: nfs4_find_reclaim_client for %.*s\n",
3141 clp->cl_name.len, clp->cl_name.data);
3143 /* find clp->cl_name in reclaim_str_hashtbl */
3144 strhashval = clientstr_hashval(clp->cl_name.data, clp->cl_name.len);
3145 list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) {
3146 if (cmp_name(&crp->cr_name, &clp->cl_name)) {
3154 * Called from OPEN. Look for clientid in reclaim list.
3157 nfs4_check_open_reclaim(clientid_t *clid)
3159 return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad;
3164 * Start and stop routines
3168 __nfs4_state_init(void)
3173 if (!nfs4_reclaim_init) {
3174 for (i = 0; i < CLIENT_HASH_SIZE; i++)
3175 INIT_LIST_HEAD(&reclaim_str_hashtbl[i]);
3176 reclaim_str_hashtbl_size = 0;
3177 nfs4_reclaim_init = 1;
3179 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3180 INIT_LIST_HEAD(&conf_id_hashtbl[i]);
3181 INIT_LIST_HEAD(&conf_str_hashtbl[i]);
3182 INIT_LIST_HEAD(&unconf_str_hashtbl[i]);
3183 INIT_LIST_HEAD(&unconf_id_hashtbl[i]);
3185 for (i = 0; i < FILE_HASH_SIZE; i++) {
3186 INIT_LIST_HEAD(&file_hashtbl[i]);
3188 for (i = 0; i < OWNER_HASH_SIZE; i++) {
3189 INIT_LIST_HEAD(&ownerstr_hashtbl[i]);
3190 INIT_LIST_HEAD(&ownerid_hashtbl[i]);
3192 for (i = 0; i < STATEID_HASH_SIZE; i++) {
3193 INIT_LIST_HEAD(&stateid_hashtbl[i]);
3194 INIT_LIST_HEAD(&lockstateid_hashtbl[i]);
3196 for (i = 0; i < LOCK_HASH_SIZE; i++) {
3197 INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]);
3198 INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);
3200 memset(&zerostateid, 0, sizeof(stateid_t));
3201 memset(&onestateid, ~0, sizeof(stateid_t));
3203 INIT_LIST_HEAD(&close_lru);
3204 INIT_LIST_HEAD(&client_lru);
3205 INIT_LIST_HEAD(&del_recall_lru);
3206 spin_lock_init(&recall_lock);
3207 boot_time = get_seconds();
3208 grace_time = max(old_lease_time, lease_time);
3209 if (reclaim_str_hashtbl_size == 0)
3212 printk("NFSD: starting %ld-second grace period\n", grace_time);
3213 grace_end = boot_time + grace_time;
3214 INIT_WORK(&laundromat_work,laundromat_main, NULL);
3215 laundry_wq = create_singlethread_workqueue("nfsd4");
3216 queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ);
3220 nfs4_state_init(void)
3226 status = nfsd4_init_slabs();
3229 __nfs4_state_init();
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 * if nfsd is not started, simply set the global lease.
3312 * if nfsd(s) are running, lease change requires nfsv4 state to be reset.
3313 * e.g: boot_time is reset, existing nfs4_client structs are
3314 * used to fill reclaim_str_hashtbl, then all state (except for the
3315 * reclaim_str_hashtbl) is re-initialized.
3317 * if the old lease time is greater than the new lease time, the grace
3318 * period needs to be set to the old lease time to allow clients to reclaim
3319 * their state. XXX - we may want to set the grace period == lease time
3320 * after an initial grace period == old lease time
3322 * if an error occurs in this process, the new lease is set, but the server
3323 * will not honor OPEN or LOCK reclaims, and will return nfserr_no_grace
3324 * which means OPEN/LOCK/READ/WRITE will fail during grace period.
3326 * clients will attempt to reset all state with SETCLIENTID/CONFIRM, and
3327 * OPEN and LOCK reclaims.
3330 nfs4_reset_lease(time_t leasetime)
3332 struct nfs4_client *clp;
3335 printk("NFSD: New leasetime %ld\n",leasetime);
3339 old_lease_time = lease_time;
3340 lease_time = leasetime;
3342 nfs4_release_reclaim();
3344 /* populate reclaim_str_hashtbl with current confirmed nfs4_clientid */
3345 for (i = 0; i < CLIENT_HASH_SIZE; i++) {
3346 list_for_each_entry(clp, &conf_id_hashtbl[i], cl_idhash) {
3347 if (!nfs4_client_to_reclaim(clp->cl_name.data,
3348 clp->cl_name.len)) {
3349 nfs4_release_reclaim();
3355 __nfs4_state_shutdown();
3356 __nfs4_state_init();
3357 nfs4_unlock_state();