2 * Copyright (c) 2009 Rick Macklem, University of Guelph
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 * These functions implement the client side state handling for NFSv4.
33 * NFSv4 state handling:
34 * - A lockowner is used to determine lock contention, so it
35 * corresponds directly to a Posix pid. (1 to 1 mapping)
36 * - The correct granularity of an OpenOwner is not nearly so
37 * obvious. An OpenOwner does the following:
38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
39 * - is used to check for Open/Share contention (not applicable to
40 * this client, since all Opens are Deny_None)
41 * As such, I considered both extreme.
42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes
43 * all Open, Close and Lock (with a new lockowner) Ops.
44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for
45 * every Open, for most servers.
46 * So, I chose to use the same mapping as I did for LockOwnwers.
47 * The main concern here is that you can end up with multiple Opens
48 * for the same File Handle, but on different OpenOwners (opens
49 * inherited from parents, grandparents...) and you do not know
50 * which of these the vnodeop close applies to. This is handled by
51 * delaying the Close Op(s) until all of the Opens have been closed.
52 * (It is not yet obvious if this is the correct granularity.)
53 * - How the code handles serialization:
54 * - For the ClientId, it uses an exclusive lock while getting its
55 * SetClientId and during recovery. Otherwise, it uses a shared
56 * lock via a reference count.
57 * - For the rest of the data structures, it uses an SMP mutex
58 * (once the nfs client is SMP safe) and doesn't sleep while
59 * manipulating the linked lists.
60 * - The serialization of Open/Close/Lock/LockU falls out in the
61 * "wash", since OpenOwners and LockOwners are both mapped from
62 * Posix pid. In other words, there is only one Posix pid using
63 * any given owner, so that owner is serialized. (If you change
64 * the granularity of the OpenOwner, then code must be added to
65 * serialize Ops on the OpenOwner.)
66 * - When to get rid of OpenOwners and LockOwners.
67 * - The function nfscl_cleanup_common() is executed after a process exits.
68 * It goes through the client list looking for all Open and Lock Owners.
69 * When one is found, it is marked "defunct" or in the case of
70 * an OpenOwner without any Opens, freed.
71 * The renew thread scans for defunct Owners and gets rid of them,
72 * if it can. The LockOwners will also be deleted when the
73 * associated Open is closed.
74 * - If the LockU or Close Op(s) fail during close in a way
75 * that could be recovered upon retry, they are relinked to the
76 * ClientId's defunct open list and retried by the renew thread
77 * until they succeed or an unmount/recovery occurs.
78 * (Since we are done with them, they do not need to be recovered.)
82 #include <fs/nfs/nfsport.h>
87 extern struct nfsstats newnfsstats;
88 extern struct nfsreqhead nfsd_reqq;
92 struct nfsclhead nfsclhead; /* Head of clientid list */
93 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
94 #endif /* !APPLEKEXT */
96 static int nfscl_delegcnt = 0;
97 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *,
98 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **);
99 static void nfscl_clrelease(struct nfsclclient *);
100 static void nfscl_cleanclient(struct nfsclclient *);
101 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
102 struct ucred *, NFSPROC_T *);
103 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
104 struct nfsmount *, struct ucred *, NFSPROC_T *);
105 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *);
106 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
107 struct nfscllock *, int);
108 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
109 struct nfscllock **, int);
110 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
111 static u_int32_t nfscl_nextcbident(void);
112 static mount_t nfscl_getmnt(u_int32_t);
113 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
115 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
116 u_int8_t *, struct nfscllock **);
117 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
118 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
119 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
120 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
121 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
122 struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *);
123 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
124 struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
125 struct nfscldeleg *, struct ucred *, NFSPROC_T *);
126 static void nfscl_totalrecall(struct nfsclclient *);
127 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
128 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
129 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
130 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
131 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
132 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
133 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
134 struct ucred *, NFSPROC_T *);
135 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
136 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
137 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *);
138 static int nfscl_errmap(struct nfsrv_descript *);
139 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
140 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
141 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int);
142 static void nfscl_freeopenowner(struct nfsclowner *, int);
143 static void nfscl_cleandeleg(struct nfscldeleg *);
144 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *,
145 struct nfsmount *, NFSPROC_T *);
146 static void nfscl_emptylockowner(struct nfscllockowner *,
147 struct nfscllockownerfhhead *);
149 static short nfscberr_null[] = {
154 static short nfscberr_getattr[] = {
163 static short nfscberr_recall[] = {
173 static short *nfscl_cberrmap[] = {
181 #define NETFAMILY(clp) \
182 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
185 * Called for an open operation.
186 * If the nfhp argument is NULL, just get an openowner.
189 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
190 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
191 struct nfsclopen **opp, int *newonep, int *retp, int lockit)
193 struct nfsclclient *clp;
194 struct nfsclowner *owp, *nowp;
195 struct nfsclopen *op = NULL, *nop = NULL;
196 struct nfscldeleg *dp;
197 struct nfsclownerhead *ohp;
198 u_int8_t own[NFSV4CL_LOCKNAMELEN];
209 * Might need one or both of these, so MALLOC them now, to
210 * avoid a tsleep() in MALLOC later.
212 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner),
213 M_NFSCLOWNER, M_WAITOK);
215 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
216 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
217 ret = nfscl_getcl(vp, cred, p, &clp);
219 FREE((caddr_t)nowp, M_NFSCLOWNER);
221 FREE((caddr_t)nop, M_NFSCLOPEN);
226 * Get the Open iff it already exists.
227 * If none found, add the new one or return error, depending upon
230 nfscl_filllockowner(p->td_proc, own, F_POSIX);
233 /* First check the delegation list */
234 if (nfhp != NULL && usedeleg) {
235 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
236 if (dp->nfsdl_fhlen == fhlen &&
237 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
238 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
239 (dp->nfsdl_flags & NFSCLDL_WRITE))
248 ohp = &dp->nfsdl_owner;
250 ohp = &clp->nfsc_owner;
251 /* Now, search for an openowner */
252 LIST_FOREACH(owp, ohp, nfsow_list) {
253 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
258 * Create a new open, as required.
260 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
264 * Serialize modifications to the open owner for multiple threads
265 * within the same process using a read/write sleep lock.
268 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
271 FREE((caddr_t)nowp, M_NFSCLOWNER);
273 FREE((caddr_t)nop, M_NFSCLOPEN);
279 if (nfhp != NULL && dp != NULL && nop == NULL)
280 /* new local open on delegation */
281 *retp = NFSCLOPEN_SETCRED;
283 *retp = NFSCLOPEN_OK;
287 * Now, check the mode on the open and return the appropriate
290 if (op != NULL && (amode & ~(op->nfso_mode))) {
291 op->nfso_mode |= amode;
292 if (retp != NULL && dp == NULL)
293 *retp = NFSCLOPEN_DOOPEN;
299 * Create a new open, as required.
302 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
303 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
304 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
307 struct nfsclowner *owp = *owpp, *nowp;
308 struct nfsclopen *op, *nop;
318 if (owp == NULL && nowp != NULL) {
319 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
320 LIST_INIT(&nowp->nfsow_open);
321 nowp->nfsow_clp = clp;
322 nowp->nfsow_seqid = 0;
323 nowp->nfsow_defunct = 0;
324 nfscl_lockinit(&nowp->nfsow_rwlock);
326 newnfsstats.cllocalopenowners++;
327 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
329 newnfsstats.clopenowners++;
330 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
338 /* If an fhp has been specified, create an Open as well. */
340 /* and look for the correct open, based upon FH */
341 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
342 if (op->nfso_fhlen == fhlen &&
343 !NFSBCMP(op->nfso_fh, fhp, fhlen))
346 if (op == NULL && nop != NULL) {
349 nop->nfso_opencnt = 0;
350 nop->nfso_posixlock = 1;
351 nop->nfso_fhlen = fhlen;
352 NFSBCOPY(fhp, nop->nfso_fh, fhlen);
353 LIST_INIT(&nop->nfso_lock);
354 nop->nfso_stateid.seqid = 0;
355 nop->nfso_stateid.other[0] = 0;
356 nop->nfso_stateid.other[1] = 0;
357 nop->nfso_stateid.other[2] = 0;
359 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
360 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
362 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
363 newnfsstats.cllocalopens++;
365 newnfsstats.clopens++;
367 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
379 * Called to find/add a delegation to a client.
382 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
383 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
385 struct nfscldeleg *dp = *dpp, *tdp;
388 * First, if we have received a Read delegation for a file on a
389 * read/write file system, just return it, because they aren't
392 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) &&
393 (dp->nfsdl_flags & NFSCLDL_READ)) {
394 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p);
395 FREE((caddr_t)dp, M_NFSCLDELEG);
400 /* Look for the correct deleg, based upon FH */
402 tdp = nfscl_finddeleg(clp, nfhp, fhlen);
406 return (NFSERR_BADSTATEID);
409 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
410 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
412 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
413 newnfsstats.cldelegates++;
417 * Delegation already exists, what do we do if a new one??
420 printf("Deleg already exists!\n");
421 FREE((caddr_t)dp, M_NFSCLDELEG);
432 * Find a delegation for this file handle. Return NULL upon failure.
434 static struct nfscldeleg *
435 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
437 struct nfscldeleg *dp;
439 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
440 if (dp->nfsdl_fhlen == fhlen &&
441 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
448 * Get a stateid for an I/O operation. First, look for an open and iff
449 * found, return either a lockowner stateid or the open stateid.
450 * If no Open is found, just return error and the special stateid of all zeros.
453 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
454 struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
457 struct nfsclclient *clp;
458 struct nfsclowner *owp;
459 struct nfsclopen *op = NULL;
460 struct nfscllockowner *lp;
461 struct nfscldeleg *dp;
463 u_int8_t own[NFSV4CL_LOCKNAMELEN];
468 * Initially, just set the special stateid of all zeros.
471 stateidp->other[0] = 0;
472 stateidp->other[1] = 0;
473 stateidp->other[2] = 0;
474 if (vnode_vtype(vp) != VREG)
478 clp = nfscl_findcl(VFSTONFS(vnode_mount(vp)));
485 * Wait for recovery to complete.
487 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
488 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
489 PZERO, "nfsrecvr", NULL);
492 * First, look for a delegation.
494 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
495 if (dp->nfsdl_fhlen == fhlen &&
496 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
497 if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
498 (dp->nfsdl_flags & NFSCLDL_WRITE)) {
499 stateidp->seqid = dp->nfsdl_stateid.seqid;
500 stateidp->other[0] = dp->nfsdl_stateid.other[0];
501 stateidp->other[1] = dp->nfsdl_stateid.other[1];
502 stateidp->other[2] = dp->nfsdl_stateid.other[2];
503 if (!(np->n_flag & NDELEGRECALL)) {
504 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
506 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
508 dp->nfsdl_timestamp = NFSD_MONOSEC +
510 dp->nfsdl_rwlock.nfslock_usecnt++;
511 *lckpp = (void *)&dp->nfsdl_rwlock;
522 * If p != NULL, we want to search the parentage tree
523 * for a matching OpenOwner and use that.
525 nfscl_filllockowner(p->td_proc, own, F_POSIX);
527 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own,
529 if (error == 0 && lp != NULL) {
531 lp->nfsl_stateid.seqid;
533 lp->nfsl_stateid.other[0];
535 lp->nfsl_stateid.other[1];
537 lp->nfsl_stateid.other[2];
543 /* If not found, just look for any OpenOwner that will work. */
545 owp = LIST_FIRST(&clp->nfsc_owner);
546 while (!done && owp != NULL) {
547 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
548 if (op->nfso_fhlen == fhlen &&
549 !NFSBCMP(op->nfso_fh, nfhp, fhlen) &&
550 (mode & op->nfso_mode) == mode) {
556 owp = LIST_NEXT(owp, nfsow_list);
563 * For read aheads or write behinds, use the open cred.
564 * A read ahead or write behind is indicated by p == NULL.
567 newnfs_copycred(&op->nfso_cred, cred);
571 * No lock stateid, so return the open stateid.
573 stateidp->seqid = op->nfso_stateid.seqid;
574 stateidp->other[0] = op->nfso_stateid.other[0];
575 stateidp->other[1] = op->nfso_stateid.other[1];
576 stateidp->other[2] = op->nfso_stateid.other[2];
582 * Search for a matching file, mode and, optionally, lockowner.
585 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen,
586 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode,
587 struct nfscllockowner **lpp, struct nfsclopen **opp)
589 struct nfsclowner *owp;
590 struct nfsclopen *op, *rop, *rop2;
591 struct nfscllockowner *lp;
597 * rop will be set to the open to be returned. There are three
598 * variants of this, all for an open of the correct file:
599 * 1 - A match of lockown.
600 * 2 - A match of the openown, when no lockown match exists.
601 * 3 - A match for any open, if no openown or lockown match exists.
602 * Looking for #2 over #3 probably isn't necessary, but since
603 * RFC3530 is vague w.r.t. the relationship between openowners and
604 * lockowners, I think this is the safer way to go.
609 /* Search the client list */
610 owp = LIST_FIRST(ohp);
611 while (owp != NULL && keep_looping != 0) {
612 /* and look for the correct open */
613 op = LIST_FIRST(&owp->nfsow_open);
614 while (op != NULL && keep_looping != 0) {
615 if (op->nfso_fhlen == fhlen &&
616 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
617 && (op->nfso_mode & mode) == mode) {
619 /* Now look for a matching lockowner. */
620 LIST_FOREACH(lp, &op->nfso_lock,
622 if (!NFSBCMP(lp->nfsl_owner,
624 NFSV4CL_LOCKNAMELEN)) {
632 if (rop == NULL && !NFSBCMP(owp->nfsow_owner,
633 openown, NFSV4CL_LOCKNAMELEN)) {
641 op = LIST_NEXT(op, nfso_list);
643 owp = LIST_NEXT(owp, nfsow_list);
654 * Release use of an open owner. Called when open operations are done
655 * with the open owner.
658 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error,
659 __unused int candelete, int unlocked)
666 nfscl_lockunlock(&owp->nfsow_rwlock);
667 nfscl_clrelease(owp->nfsow_clp);
672 * Release use of an open structure under an open owner.
675 nfscl_openrelease(struct nfsclopen *op, int error, int candelete)
677 struct nfsclclient *clp;
678 struct nfsclowner *owp;
684 nfscl_lockunlock(&owp->nfsow_rwlock);
685 clp = owp->nfsow_clp;
686 if (error && candelete && op->nfso_opencnt == 0)
687 nfscl_freeopen(op, 0);
688 nfscl_clrelease(clp);
693 * Called to get a clientid structure. It will optionally lock the
694 * client data structures to do the SetClientId/SetClientId_confirm,
695 * but will release that lock and return the clientid with a refernce
697 * If the "cred" argument is NULL, a new clientid should not be created.
698 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
700 * It always clpp with a reference count on it, unless returning an error.
703 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
704 struct nfsclclient **clpp)
706 struct nfsclclient *clp;
707 struct nfsclclient *newclp = NULL;
709 struct nfsmount *nmp;
710 char uuid[HOSTUUIDLEN];
711 int igotlock = 0, error, trystalecnt, clidinusedelay, i;
714 mp = vnode_mount(vp);
717 getcredhostuuid(cred, uuid, sizeof uuid);
718 idlen = strlen(uuid);
720 idlen += sizeof (u_int64_t);
722 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
723 MALLOC(newclp, struct nfsclclient *,
724 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
729 * If a forced dismount is already in progress, don't
730 * allocate a new clientid and get out now. For the case where
731 * clp != NULL, this is a harmless optimization.
733 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
736 free(newclp, M_NFSCLCLIENT);
741 if (newclp == NULL) {
746 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1);
747 clp->nfsc_idlen = idlen;
748 LIST_INIT(&clp->nfsc_owner);
749 TAILQ_INIT(&clp->nfsc_deleg);
750 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
751 LIST_INIT(&clp->nfsc_deleghash[i]);
752 clp->nfsc_flags = NFSCLFLAGS_INITED;
753 clp->nfsc_clientidrev = 1;
754 clp->nfsc_cbident = nfscl_nextcbident();
755 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
757 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
761 nfscl_start_renewthread(clp);
765 FREE((caddr_t)newclp, M_NFSCLCLIENT);
768 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
769 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0)
770 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
771 NFSCLSTATEMUTEXPTR, mp);
773 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
774 if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
776 * Both nfsv4_lock() and nfsv4_getref() know to check
777 * for MNTK_UNMOUNTF and return without sleeping to
778 * wait for the exclusive lock to be released, since it
779 * might be held by nfscl_umount() and we need to get out
780 * now for that case and not wait until nfscl_umount()
789 * If it needs a clientid, do the setclientid now.
791 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
793 panic("nfscl_clget");
794 if (p == NULL || cred == NULL) {
796 nfsv4_unlock(&clp->nfsc_lock, 0);
801 * If RFC3530 Sec. 14.2.33 is taken literally,
802 * NFSERR_CLIDINUSE will be returned persistently for the
803 * case where a new mount of the same file system is using
804 * a different principal. In practice, NFSERR_CLIDINUSE is
805 * only returned when there is outstanding unexpired state
806 * on the clientid. As such, try for twice the lease
807 * interval, if we know what that is. Otherwise, make a
809 * The case of returning NFSERR_STALECLIENTID is far less
810 * likely, but might occur if there is a significant delay
811 * between doing the SetClientID and SetClientIDConfirm Ops,
812 * such that the server throws away the clientid before
813 * receiving the SetClientIDConfirm.
815 if (clp->nfsc_renew > 0)
816 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
818 clidinusedelay = 120;
821 error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)),
823 if (error == NFSERR_STALECLIENTID ||
824 error == NFSERR_STALEDONTRECOVER ||
825 error == NFSERR_CLIDINUSE) {
826 (void) nfs_catnap(PZERO, error, "nfs_setcl");
828 } while (((error == NFSERR_STALECLIENTID ||
829 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
830 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0));
833 nfsv4_unlock(&clp->nfsc_lock, 0);
837 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
841 nfsv4_unlock(&clp->nfsc_lock, 1);
850 * Get a reference to a clientid and return it, if valid.
852 APPLESTATIC struct nfsclclient *
853 nfscl_findcl(struct nfsmount *nmp)
855 struct nfsclclient *clp;
858 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
864 * Release the clientid structure. It may be locked or reference counted.
867 nfscl_clrelease(struct nfsclclient *clp)
870 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
871 nfsv4_unlock(&clp->nfsc_lock, 0);
873 nfsv4_relref(&clp->nfsc_lock);
877 * External call for nfscl_clrelease.
880 nfscl_clientrelease(struct nfsclclient *clp)
884 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
885 nfsv4_unlock(&clp->nfsc_lock, 0);
887 nfsv4_relref(&clp->nfsc_lock);
892 * Called when wanting to lock a byte region.
895 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
896 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
897 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
898 struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
900 struct nfscllockowner *lp;
901 struct nfsclopen *op;
902 struct nfsclclient *clp;
903 struct nfscllockowner *nlp;
904 struct nfscllock *nlop, *otherlop;
905 struct nfscldeleg *dp = NULL, *ldp = NULL;
906 struct nfscllockownerhead *lhp = NULL;
908 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
910 int error = 0, ret, donelocally = 0;
913 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
922 * Might need these, so MALLOC them now, to
923 * avoid a tsleep() in MALLOC later.
925 MALLOC(nlp, struct nfscllockowner *,
926 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
927 MALLOC(otherlop, struct nfscllock *,
928 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
929 MALLOC(nlop, struct nfscllock *,
930 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
931 nlop->nfslo_type = type;
932 nlop->nfslo_first = off;
933 if (len == NFS64BITSSET) {
934 nlop->nfslo_end = NFS64BITSSET;
936 nlop->nfslo_end = off + len;
937 if (nlop->nfslo_end <= nlop->nfslo_first)
938 error = NFSERR_INVAL;
945 error = nfscl_getcl(vp, cred, p, &clp);
948 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
949 FREE((caddr_t)otherlop, M_NFSCLLOCK);
950 FREE((caddr_t)nlop, M_NFSCLLOCK);
957 openownp = ropenownp;
959 nfscl_filllockowner(id, own, flags);
961 nfscl_filllockowner(p->td_proc, openown, F_POSIX);
967 * First, search for a delegation. If one exists for this file,
968 * the lock can be done locally against it, so long as there
969 * isn't a local lock conflict.
971 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
973 /* Just sanity check for correct type of delegation */
974 if (dp != NULL && ((dp->nfsdl_flags &
975 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
977 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
981 /* Now, find an open and maybe a lockowner. */
982 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh,
983 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
985 ret = nfscl_getopen(&clp->nfsc_owner,
986 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
987 ownp, mode, NULL, &op);
989 lhp = &dp->nfsdl_lock;
990 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
991 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
992 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
1000 * Get the related Open and maybe lockowner.
1002 error = nfscl_getopen(&clp->nfsc_owner,
1003 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1004 ownp, mode, &lp, &op);
1006 lhp = &op->nfso_lock;
1008 if (!error && !recovery)
1009 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1010 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1013 nfscl_clrelease(clp);
1016 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1017 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1018 FREE((caddr_t)nlop, M_NFSCLLOCK);
1023 * Ok, see if a lockowner exists and create one, as required.
1026 LIST_FOREACH(lp, lhp, nfsl_list) {
1027 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1031 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1033 NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1034 NFSV4CL_LOCKNAMELEN);
1036 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1037 NFSV4CL_LOCKNAMELEN);
1038 nlp->nfsl_seqid = 0;
1039 nlp->nfsl_lockflags = flags;
1040 nlp->nfsl_inprog = NULL;
1041 nfscl_lockinit(&nlp->nfsl_rwlock);
1042 LIST_INIT(&nlp->nfsl_lock);
1044 nlp->nfsl_open = NULL;
1045 newnfsstats.cllocallockowners++;
1047 nlp->nfsl_open = op;
1048 newnfsstats.cllockowners++;
1050 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1057 * Now, update the byte ranges for locks.
1059 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1065 nfscl_clrelease(clp);
1068 * Serial modifications on the lock owner for multiple threads
1069 * for the same process using a read/write lock.
1072 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1078 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1080 FREE((caddr_t)nlop, M_NFSCLLOCK);
1082 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1089 * Called to unlock a byte range, for LockU.
1092 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1093 __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1094 struct nfsclclient *clp, void *id, int flags,
1095 struct nfscllockowner **lpp, int *dorpcp)
1097 struct nfscllockowner *lp;
1098 struct nfsclowner *owp;
1099 struct nfsclopen *op;
1100 struct nfscllock *nlop, *other_lop = NULL;
1101 struct nfscldeleg *dp;
1103 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1111 * Might need these, so MALLOC them now, to
1112 * avoid a tsleep() in MALLOC later.
1114 MALLOC(nlop, struct nfscllock *,
1115 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1116 nlop->nfslo_type = F_UNLCK;
1117 nlop->nfslo_first = off;
1118 if (len == NFS64BITSSET) {
1119 nlop->nfslo_end = NFS64BITSSET;
1121 nlop->nfslo_end = off + len;
1122 if (nlop->nfslo_end <= nlop->nfslo_first) {
1123 FREE((caddr_t)nlop, M_NFSCLLOCK);
1124 return (NFSERR_INVAL);
1128 MALLOC(other_lop, struct nfscllock *,
1129 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1132 nfscl_filllockowner(id, own, flags);
1136 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1137 np->n_fhp->nfh_len);
1140 * First, unlock any local regions on a delegation.
1143 /* Look for this lockowner. */
1144 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1145 if (!NFSBCMP(lp->nfsl_owner, own,
1146 NFSV4CL_LOCKNAMELEN))
1150 /* Use other_lop, so nlop is still available */
1151 (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1155 * Now, find a matching open/lockowner that hasn't already been done,
1156 * as marked by nfsl_inprog.
1160 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1161 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1162 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1163 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1164 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1165 if (lp->nfsl_inprog == NULL &&
1166 !NFSBCMP(lp->nfsl_owner, own,
1167 NFSV4CL_LOCKNAMELEN)) {
1181 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1185 * Serial modifications on the lock owner for multiple
1186 * threads for the same process using a read/write lock.
1188 lp->nfsl_inprog = p;
1189 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1194 FREE((caddr_t)nlop, M_NFSCLLOCK);
1196 FREE((caddr_t)other_lop, M_NFSCLLOCK);
1201 * Release all lockowners marked in progess for this process and file.
1204 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1205 void *id, int flags)
1207 struct nfsclowner *owp;
1208 struct nfsclopen *op;
1209 struct nfscllockowner *lp;
1211 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1214 nfscl_filllockowner(id, own, flags);
1216 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1217 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1218 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1219 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1220 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1221 if (lp->nfsl_inprog == p &&
1222 !NFSBCMP(lp->nfsl_owner, own,
1223 NFSV4CL_LOCKNAMELEN)) {
1224 lp->nfsl_inprog = NULL;
1225 nfscl_lockunlock(&lp->nfsl_rwlock);
1231 nfscl_clrelease(clp);
1236 * Called to find out if any bytes within the byte range specified are
1237 * write locked by the calling process. Used to determine if flushing
1238 * is required before a LockU.
1239 * If in doubt, return 1, so the flush will occur.
1242 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1243 struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1245 struct nfsclowner *owp;
1246 struct nfscllockowner *lp;
1247 struct nfsclopen *op;
1248 struct nfsclclient *clp;
1249 struct nfscllock *lop;
1250 struct nfscldeleg *dp;
1253 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1257 switch (fl->l_whence) {
1261 * Caller is responsible for adding any necessary offset
1262 * when SEEK_CUR is used.
1267 off = np->n_size + fl->l_start;
1272 if (fl->l_len != 0) {
1273 end = off + fl->l_len;
1280 error = nfscl_getcl(vp, cred, p, &clp);
1283 nfscl_filllockowner(id, own, flags);
1287 * First check the delegation locks.
1289 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1291 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1292 if (!NFSBCMP(lp->nfsl_owner, own,
1293 NFSV4CL_LOCKNAMELEN))
1297 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1298 if (lop->nfslo_first >= end)
1300 if (lop->nfslo_end <= off)
1302 if (lop->nfslo_type == F_WRLCK) {
1303 nfscl_clrelease(clp);
1312 * Now, check state against the server.
1314 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1315 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1316 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1317 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1318 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1319 if (!NFSBCMP(lp->nfsl_owner, own,
1320 NFSV4CL_LOCKNAMELEN))
1324 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1325 if (lop->nfslo_first >= end)
1327 if (lop->nfslo_end <= off)
1329 if (lop->nfslo_type == F_WRLCK) {
1330 nfscl_clrelease(clp);
1339 nfscl_clrelease(clp);
1345 * Release a byte range lock owner structure.
1348 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1350 struct nfsclclient *clp;
1355 clp = lp->nfsl_open->nfso_own->nfsow_clp;
1356 if (error != 0 && candelete &&
1357 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1358 nfscl_freelockowner(lp, 0);
1360 nfscl_lockunlock(&lp->nfsl_rwlock);
1361 nfscl_clrelease(clp);
1366 * Free up an open structure and any associated byte range lock structures.
1369 nfscl_freeopen(struct nfsclopen *op, int local)
1372 LIST_REMOVE(op, nfso_list);
1373 nfscl_freealllocks(&op->nfso_lock, local);
1374 FREE((caddr_t)op, M_NFSCLOPEN);
1376 newnfsstats.cllocalopens--;
1378 newnfsstats.clopens--;
1382 * Free up all lock owners and associated locks.
1385 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1387 struct nfscllockowner *lp, *nlp;
1389 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1390 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1392 nfscl_freelockowner(lp, local);
1397 * Called for an Open when NFSERR_EXPIRED is received from the server.
1398 * If there are no byte range locks nor a Share Deny lost, try to do a
1399 * fresh Open. Otherwise, free the open.
1402 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1403 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1405 struct nfscllockowner *lp;
1406 struct nfscldeleg *dp;
1407 int mustdelete = 0, error;
1410 * Look for any byte range lock(s).
1412 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1413 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1420 * If no byte range lock(s) nor a Share deny, try to re-open.
1422 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1423 newnfs_copycred(&op->nfso_cred, cred);
1425 error = nfsrpc_reopen(nmp, op->nfso_fh,
1426 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1430 FREE((caddr_t)dp, M_NFSCLDELEG);
1435 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1436 op->nfso_fhlen, cred, p, &dp);
1440 * If a byte range lock or Share deny or couldn't re-open, free it.
1443 nfscl_freeopen(op, 0);
1444 return (mustdelete);
1448 * Free up an open owner structure.
1451 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1454 LIST_REMOVE(owp, nfsow_list);
1455 FREE((caddr_t)owp, M_NFSCLOWNER);
1457 newnfsstats.cllocalopenowners--;
1459 newnfsstats.clopenowners--;
1463 * Free up a byte range lock owner structure.
1466 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1468 struct nfscllock *lop, *nlop;
1470 LIST_REMOVE(lp, nfsl_list);
1471 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1472 nfscl_freelock(lop, local);
1474 FREE((caddr_t)lp, M_NFSCLLOCKOWNER);
1476 newnfsstats.cllocallockowners--;
1478 newnfsstats.cllockowners--;
1482 * Free up a byte range lock structure.
1485 nfscl_freelock(struct nfscllock *lop, int local)
1488 LIST_REMOVE(lop, nfslo_list);
1489 FREE((caddr_t)lop, M_NFSCLLOCK);
1491 newnfsstats.cllocallocks--;
1493 newnfsstats.cllocks--;
1497 * Clean out the state related to a delegation.
1500 nfscl_cleandeleg(struct nfscldeleg *dp)
1502 struct nfsclowner *owp, *nowp;
1503 struct nfsclopen *op;
1505 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1506 op = LIST_FIRST(&owp->nfsow_open);
1508 if (LIST_NEXT(op, nfso_list) != NULL)
1509 panic("nfscleandel");
1510 nfscl_freeopen(op, 1);
1512 nfscl_freeopenowner(owp, 1);
1514 nfscl_freealllocks(&dp->nfsdl_lock, 1);
1518 * Free a delegation.
1521 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp)
1524 TAILQ_REMOVE(hdp, dp, nfsdl_list);
1525 LIST_REMOVE(dp, nfsdl_hash);
1526 FREE((caddr_t)dp, M_NFSCLDELEG);
1527 newnfsstats.cldelegates--;
1532 * Free up all state related to this client structure.
1535 nfscl_cleanclient(struct nfsclclient *clp)
1537 struct nfsclowner *owp, *nowp;
1538 struct nfsclopen *op, *nop;
1540 /* Now, all the OpenOwners, etc. */
1541 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1542 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1543 nfscl_freeopen(op, 0);
1545 nfscl_freeopenowner(owp, 0);
1550 * Called when an NFSERR_EXPIRED is received from the server.
1553 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1554 struct ucred *cred, NFSPROC_T *p)
1556 struct nfsclowner *owp, *nowp, *towp;
1557 struct nfsclopen *op, *nop, *top;
1558 struct nfscldeleg *dp, *ndp;
1559 int ret, printed = 0;
1562 * First, merge locally issued Opens into the list for the server.
1564 dp = TAILQ_FIRST(&clp->nfsc_deleg);
1565 while (dp != NULL) {
1566 ndp = TAILQ_NEXT(dp, nfsdl_list);
1567 owp = LIST_FIRST(&dp->nfsdl_owner);
1568 while (owp != NULL) {
1569 nowp = LIST_NEXT(owp, nfsow_list);
1570 op = LIST_FIRST(&owp->nfsow_open);
1572 if (LIST_NEXT(op, nfso_list) != NULL)
1574 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1575 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1576 NFSV4CL_LOCKNAMELEN))
1580 /* Merge opens in */
1581 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1582 if (top->nfso_fhlen == op->nfso_fhlen &&
1583 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1585 top->nfso_mode |= op->nfso_mode;
1586 top->nfso_opencnt += op->nfso_opencnt;
1591 /* Just add the open to the owner list */
1592 LIST_REMOVE(op, nfso_list);
1593 op->nfso_own = towp;
1594 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1595 newnfsstats.cllocalopens--;
1596 newnfsstats.clopens++;
1599 /* Just add the openowner to the client list */
1600 LIST_REMOVE(owp, nfsow_list);
1601 owp->nfsow_clp = clp;
1602 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1603 newnfsstats.cllocalopenowners--;
1604 newnfsstats.clopenowners++;
1605 newnfsstats.cllocalopens--;
1606 newnfsstats.clopens++;
1611 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1613 printf("nfsv4 expired locks lost\n");
1615 nfscl_cleandeleg(dp);
1616 nfscl_freedeleg(&clp->nfsc_deleg, dp);
1619 if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1623 * Now, try and reopen against the server.
1625 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1626 owp->nfsow_seqid = 0;
1627 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1628 ret = nfscl_expireopen(clp, op, nmp, cred, p);
1629 if (ret && !printed) {
1631 printf("nfsv4 expired locks lost\n");
1634 if (LIST_EMPTY(&owp->nfsow_open))
1635 nfscl_freeopenowner(owp, 0);
1640 * This function must be called after the process represented by "own" has
1641 * exited. Must be called with CLSTATE lock held.
1644 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1646 struct nfsclowner *owp, *nowp;
1647 struct nfscllockowner *lp, *nlp;
1648 struct nfscldeleg *dp;
1650 /* First, get rid of local locks on delegations. */
1651 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1652 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1653 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1654 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1656 nfscl_freelockowner(lp, 1);
1660 owp = LIST_FIRST(&clp->nfsc_owner);
1661 while (owp != NULL) {
1662 nowp = LIST_NEXT(owp, nfsow_list);
1663 if (!NFSBCMP(owp->nfsow_owner, own,
1664 NFSV4CL_LOCKNAMELEN)) {
1666 * If there are children that haven't closed the
1667 * file descriptors yet, the opens will still be
1668 * here. For that case, let the renew thread clear
1669 * out the OpenOwner later.
1671 if (LIST_EMPTY(&owp->nfsow_open))
1672 nfscl_freeopenowner(owp, 0);
1674 owp->nfsow_defunct = 1;
1681 * Find open/lock owners for processes that have exited.
1684 nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
1686 struct nfsclowner *owp, *nowp;
1687 struct nfsclopen *op;
1688 struct nfscllockowner *lp, *nlp;
1692 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1693 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1694 LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
1695 if (LIST_EMPTY(&lp->nfsl_lock))
1696 nfscl_emptylockowner(lp, lhp);
1699 if (nfscl_procdoesntexist(owp->nfsow_owner))
1700 nfscl_cleanup_common(clp, owp->nfsow_owner);
1703 NFSPROCLISTUNLOCK();
1707 * Take the empty lock owner and move it to the local lhp list if the
1708 * associated process no longer exists.
1711 nfscl_emptylockowner(struct nfscllockowner *lp,
1712 struct nfscllockownerfhhead *lhp)
1714 struct nfscllockownerfh *lfhp, *mylfhp;
1715 struct nfscllockowner *nlp;
1718 /* If not a Posix lock owner, just return. */
1719 if ((lp->nfsl_lockflags & F_POSIX) == 0)
1725 * First, search to see if this lock owner is already in the list.
1726 * If it is, then the associated process no longer exists.
1728 SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
1729 if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
1730 !NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
1733 LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
1734 if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
1735 NFSV4CL_LOCKNAMELEN))
1738 /* If not found, check if process still exists. */
1739 if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
1742 /* Move the lock owner over to the local list. */
1743 if (mylfhp == NULL) {
1744 mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
1748 mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
1749 NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
1750 mylfhp->nfslfh_len);
1751 LIST_INIT(&mylfhp->nfslfh_lock);
1752 SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
1754 LIST_REMOVE(lp, nfsl_list);
1755 LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
1758 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */
1760 * Called from nfs umount to free up the clientid.
1763 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
1765 struct nfsclclient *clp;
1770 * For the case that matters, this is the thread that set
1771 * MNTK_UNMOUNTF, so it will see it set. The code that follows is
1772 * done to ensure that any thread executing nfscl_getcl() after
1773 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
1774 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
1775 * explanation, courtesy of Alan Cox.
1776 * What follows is a snippet from Alan Cox's email at:
1777 * http://docs.FreeBSD.org/cgi/
1778 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
1780 * 1. Set MNTK_UNMOUNTF
1781 * 2. Acquire a standard FreeBSD mutex "m".
1782 * 3. Update some data structures.
1783 * 4. Release mutex "m".
1785 * Then, other threads that acquire "m" after step 4 has occurred will
1786 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to
1787 * step 2 may or may not see MNTK_UNMOUNTF as set.
1790 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
1798 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
1799 panic("nfscl umount");
1802 * First, handshake with the nfscl renew thread, to terminate
1805 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
1806 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
1807 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
1811 * Now, get the exclusive lock on the client state, so
1812 * that no uses of the state are still in progress.
1815 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1816 NFSCLSTATEMUTEXPTR, NULL);
1817 } while (!igotlock);
1821 * Free up all the state. It will expire on the server, but
1822 * maybe we should do a SetClientId/SetClientIdConfirm so
1823 * the server throws it away?
1825 LIST_REMOVE(clp, nfsc_list);
1826 nfscl_delegreturnall(clp, p);
1827 cred = newnfs_getcred();
1828 (void) nfsrpc_setclient(nmp, clp, cred, p);
1829 nfscl_cleanclient(clp);
1832 FREE((caddr_t)clp, M_NFSCLCLIENT);
1838 * This function is called when a server replies with NFSERR_STALECLIENTID
1839 * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens
1840 * and Locks with reclaim. If these fail, it deletes the corresponding state.
1843 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
1845 struct nfsclowner *owp, *nowp;
1846 struct nfsclopen *op, *nop;
1847 struct nfscllockowner *lp, *nlp;
1848 struct nfscllock *lop, *nlop;
1849 struct nfscldeleg *dp, *ndp, *tdp;
1850 struct nfsmount *nmp;
1851 struct ucred *tcred;
1852 struct nfsclopenhead extra_open;
1853 struct nfscldeleghead extra_deleg;
1856 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
1857 int igotlock = 0, error, trycnt, firstlock, s;
1860 * First, lock the client structure, so everyone else will
1861 * block when trying to use state.
1864 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
1866 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1867 NFSCLSTATEMUTEXPTR, NULL);
1868 } while (!igotlock);
1871 nmp = clp->nfsc_nmp;
1873 panic("nfscl recover");
1876 error = nfsrpc_setclient(nmp, clp, cred, p);
1877 } while ((error == NFSERR_STALECLIENTID ||
1878 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
1880 nfscl_cleanclient(clp);
1882 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
1883 NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG);
1884 wakeup(&clp->nfsc_flags);
1885 nfsv4_unlock(&clp->nfsc_lock, 0);
1889 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
1890 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
1893 * Mark requests already queued on the server, so that they don't
1894 * initiate another recovery cycle. Any requests already in the
1895 * queue that handle state information will have the old stale
1896 * clientid/stateid and will get a NFSERR_STALESTATEID or
1897 * NFSERR_STALECLIENTID reply from the server. This will be
1898 * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set.
1902 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
1903 if (rep->r_nmp == nmp)
1904 rep->r_flags |= R_DONTRECOVER;
1910 * Now, mark all delegations "need reclaim".
1912 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
1913 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
1915 TAILQ_INIT(&extra_deleg);
1916 LIST_INIT(&extra_open);
1918 * Now traverse the state lists, doing Open and Lock Reclaims.
1920 tcred = newnfs_getcred();
1921 owp = LIST_FIRST(&clp->nfsc_owner);
1922 while (owp != NULL) {
1923 nowp = LIST_NEXT(owp, nfsow_list);
1924 owp->nfsow_seqid = 0;
1925 op = LIST_FIRST(&owp->nfsow_open);
1926 while (op != NULL) {
1927 nop = LIST_NEXT(op, nfso_list);
1928 if (error != NFSERR_NOGRACE) {
1929 /* Search for a delegation to reclaim with the open */
1930 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1931 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
1933 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
1934 mode = NFSV4OPEN_ACCESSWRITE;
1935 delegtype = NFSV4OPEN_DELEGATEWRITE;
1937 mode = NFSV4OPEN_ACCESSREAD;
1938 delegtype = NFSV4OPEN_DELEGATEREAD;
1940 if ((op->nfso_mode & mode) == mode &&
1941 op->nfso_fhlen == dp->nfsdl_fhlen &&
1942 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
1947 delegtype = NFSV4OPEN_DELEGATENONE;
1948 newnfs_copycred(&op->nfso_cred, tcred);
1949 error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
1950 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
1951 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
1954 /* Handle any replied delegation */
1955 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
1956 || NFSMNT_RDONLY(nmp->nm_mountp))) {
1957 if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
1958 mode = NFSV4OPEN_ACCESSWRITE;
1960 mode = NFSV4OPEN_ACCESSREAD;
1961 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1962 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
1964 if ((op->nfso_mode & mode) == mode &&
1965 op->nfso_fhlen == dp->nfsdl_fhlen &&
1966 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
1968 dp->nfsdl_stateid = ndp->nfsdl_stateid;
1969 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
1970 dp->nfsdl_ace = ndp->nfsdl_ace;
1971 dp->nfsdl_change = ndp->nfsdl_change;
1972 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
1973 if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
1974 dp->nfsdl_flags |= NFSCLDL_RECALL;
1975 FREE((caddr_t)ndp, M_NFSCLDELEG);
1982 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
1984 /* and reclaim all byte range locks */
1985 lp = LIST_FIRST(&op->nfso_lock);
1986 while (lp != NULL) {
1987 nlp = LIST_NEXT(lp, nfsl_list);
1990 lop = LIST_FIRST(&lp->nfsl_lock);
1991 while (lop != NULL) {
1992 nlop = LIST_NEXT(lop, nfslo_list);
1993 if (lop->nfslo_end == NFS64BITSSET)
1996 len = lop->nfslo_end - lop->nfslo_first;
1997 if (error != NFSERR_NOGRACE)
1998 error = nfscl_trylock(nmp, NULL,
1999 op->nfso_fh, op->nfso_fhlen, lp,
2000 firstlock, 1, lop->nfslo_first, len,
2001 lop->nfslo_type, tcred, p);
2003 nfscl_freelock(lop, 0);
2008 /* If no locks, but a lockowner, just delete it. */
2009 if (LIST_EMPTY(&lp->nfsl_lock))
2010 nfscl_freelockowner(lp, 0);
2014 nfscl_freeopen(op, 0);
2023 * Now, try and get any delegations not yet reclaimed by cobbling
2024 * to-gether an appropriate open.
2027 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2028 while (dp != NULL) {
2029 ndp = TAILQ_NEXT(dp, nfsdl_list);
2030 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2032 MALLOC(nowp, struct nfsclowner *,
2033 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2035 * Name must be as long an largest possible
2036 * NFSV4CL_LOCKNAMELEN. 12 for now.
2038 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2039 NFSV4CL_LOCKNAMELEN);
2040 LIST_INIT(&nowp->nfsow_open);
2041 nowp->nfsow_clp = clp;
2042 nowp->nfsow_seqid = 0;
2043 nowp->nfsow_defunct = 0;
2044 nfscl_lockinit(&nowp->nfsow_rwlock);
2047 if (error != NFSERR_NOGRACE) {
2048 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
2049 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2050 nop->nfso_own = nowp;
2051 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2052 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2053 delegtype = NFSV4OPEN_DELEGATEWRITE;
2055 nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2056 delegtype = NFSV4OPEN_DELEGATEREAD;
2058 nop->nfso_opencnt = 0;
2059 nop->nfso_posixlock = 1;
2060 nop->nfso_fhlen = dp->nfsdl_fhlen;
2061 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2062 LIST_INIT(&nop->nfso_lock);
2063 nop->nfso_stateid.seqid = 0;
2064 nop->nfso_stateid.other[0] = 0;
2065 nop->nfso_stateid.other[1] = 0;
2066 nop->nfso_stateid.other[2] = 0;
2067 newnfs_copycred(&dp->nfsdl_cred, tcred);
2068 newnfs_copyincred(tcred, &nop->nfso_cred);
2070 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2071 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2072 nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2073 delegtype, tcred, p);
2075 if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2076 mode = NFSV4OPEN_ACCESSWRITE;
2078 mode = NFSV4OPEN_ACCESSREAD;
2079 if ((nop->nfso_mode & mode) == mode &&
2080 nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2081 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2083 dp->nfsdl_stateid = tdp->nfsdl_stateid;
2084 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2085 dp->nfsdl_ace = tdp->nfsdl_ace;
2086 dp->nfsdl_change = tdp->nfsdl_change;
2087 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2088 if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2089 dp->nfsdl_flags |= NFSCLDL_RECALL;
2090 FREE((caddr_t)tdp, M_NFSCLDELEG);
2092 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2098 FREE((caddr_t)nop, M_NFSCLOPEN);
2100 * Couldn't reclaim it, so throw the state
2103 nfscl_cleandeleg(dp);
2104 nfscl_freedeleg(&clp->nfsc_deleg, dp);
2106 LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2113 * Now, get rid of extra Opens and Delegations.
2115 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2117 newnfs_copycred(&op->nfso_cred, tcred);
2118 error = nfscl_tryclose(op, tcred, nmp, p);
2119 if (error == NFSERR_GRACE)
2120 (void) nfs_catnap(PZERO, error, "nfsexcls");
2121 } while (error == NFSERR_GRACE);
2122 LIST_REMOVE(op, nfso_list);
2123 FREE((caddr_t)op, M_NFSCLOPEN);
2126 FREE((caddr_t)nowp, M_NFSCLOWNER);
2128 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2130 newnfs_copycred(&dp->nfsdl_cred, tcred);
2131 error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2132 if (error == NFSERR_GRACE)
2133 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2134 } while (error == NFSERR_GRACE);
2135 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2136 FREE((caddr_t)dp, M_NFSCLDELEG);
2140 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2141 wakeup(&clp->nfsc_flags);
2142 nfsv4_unlock(&clp->nfsc_lock, 0);
2148 * This function is called when a server replies with NFSERR_EXPIRED.
2149 * It deletes all state for the client and does a fresh SetClientId/confirm.
2150 * XXX Someday it should post a signal to the process(es) that hold the
2151 * state, so they know that lock state has been lost.
2154 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2156 struct nfsmount *nmp;
2158 int igotlock = 0, error, trycnt;
2161 * If the clientid has gone away or a new SetClientid has already
2162 * been done, just return ok.
2164 if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2168 * First, lock the client structure, so everyone else will
2169 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2170 * that only one thread does the work.
2173 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2175 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2176 NFSCLSTATEMUTEXPTR, NULL);
2177 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2178 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2180 nfsv4_unlock(&clp->nfsc_lock, 0);
2184 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2187 nmp = clp->nfsc_nmp;
2189 panic("nfscl expired");
2190 cred = newnfs_getcred();
2193 error = nfsrpc_setclient(nmp, clp, cred, p);
2194 } while ((error == NFSERR_STALECLIENTID ||
2195 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2198 * Clear out any state.
2200 nfscl_cleanclient(clp);
2202 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
2203 NFSCLFLAGS_RECOVER);
2206 * Expire the state for the client.
2208 nfscl_expireclient(clp, nmp, cred, p);
2210 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2211 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2213 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2214 wakeup(&clp->nfsc_flags);
2215 nfsv4_unlock(&clp->nfsc_lock, 0);
2222 * This function inserts a lock in the list after insert_lop.
2225 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2226 struct nfscllock *insert_lop, int local)
2229 if ((struct nfscllockowner *)insert_lop == lp)
2230 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2232 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2234 newnfsstats.cllocallocks++;
2236 newnfsstats.cllocks++;
2240 * This function updates the locking for a lock owner and given file. It
2241 * maintains a list of lock ranges ordered on increasing file offset that
2242 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2243 * It always adds new_lop to the list and sometimes uses the one pointed
2245 * Returns 1 if the locks were modified, 0 otherwise.
2248 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2249 struct nfscllock **other_lopp, int local)
2251 struct nfscllock *new_lop = *new_lopp;
2252 struct nfscllock *lop, *tlop, *ilop;
2253 struct nfscllock *other_lop;
2254 int unlock = 0, modified = 0;
2258 * Work down the list until the lock is merged.
2260 if (new_lop->nfslo_type == F_UNLCK)
2262 ilop = (struct nfscllock *)lp;
2263 lop = LIST_FIRST(&lp->nfsl_lock);
2264 while (lop != NULL) {
2266 * Only check locks for this file that aren't before the start of
2269 if (lop->nfslo_end >= new_lop->nfslo_first) {
2270 if (new_lop->nfslo_end < lop->nfslo_first) {
2272 * If the new lock ends before the start of the
2273 * current lock's range, no merge, just insert
2278 if (new_lop->nfslo_type == lop->nfslo_type ||
2279 (new_lop->nfslo_first <= lop->nfslo_first &&
2280 new_lop->nfslo_end >= lop->nfslo_end)) {
2282 * This lock can be absorbed by the new lock/unlock.
2283 * This happens when it covers the entire range
2284 * of the old lock or is contiguous
2285 * with the old lock and is of the same type or an
2288 if (new_lop->nfslo_type != lop->nfslo_type ||
2289 new_lop->nfslo_first != lop->nfslo_first ||
2290 new_lop->nfslo_end != lop->nfslo_end)
2292 if (lop->nfslo_first < new_lop->nfslo_first)
2293 new_lop->nfslo_first = lop->nfslo_first;
2294 if (lop->nfslo_end > new_lop->nfslo_end)
2295 new_lop->nfslo_end = lop->nfslo_end;
2297 lop = LIST_NEXT(lop, nfslo_list);
2298 nfscl_freelock(tlop, local);
2303 * All these cases are for contiguous locks that are not the
2304 * same type, so they can't be merged.
2306 if (new_lop->nfslo_first <= lop->nfslo_first) {
2308 * This case is where the new lock overlaps with the
2309 * first part of the old lock. Move the start of the
2310 * old lock to just past the end of the new lock. The
2311 * new lock will be inserted in front of the old, since
2312 * ilop hasn't been updated. (We are done now.)
2314 if (lop->nfslo_first != new_lop->nfslo_end) {
2315 lop->nfslo_first = new_lop->nfslo_end;
2320 if (new_lop->nfslo_end >= lop->nfslo_end) {
2322 * This case is where the new lock overlaps with the
2323 * end of the old lock's range. Move the old lock's
2324 * end to just before the new lock's first and insert
2325 * the new lock after the old lock.
2326 * Might not be done yet, since the new lock could
2327 * overlap further locks with higher ranges.
2329 if (lop->nfslo_end != new_lop->nfslo_first) {
2330 lop->nfslo_end = new_lop->nfslo_first;
2334 lop = LIST_NEXT(lop, nfslo_list);
2338 * The final case is where the new lock's range is in the
2339 * middle of the current lock's and splits the current lock
2340 * up. Use *other_lopp to handle the second part of the
2341 * split old lock range. (We are done now.)
2342 * For unlock, we use new_lop as other_lop and tmp, since
2343 * other_lop and new_lop are the same for this case.
2344 * We noted the unlock case above, so we don't need
2345 * new_lop->nfslo_type any longer.
2347 tmp = new_lop->nfslo_first;
2349 other_lop = new_lop;
2352 other_lop = *other_lopp;
2355 other_lop->nfslo_first = new_lop->nfslo_end;
2356 other_lop->nfslo_end = lop->nfslo_end;
2357 other_lop->nfslo_type = lop->nfslo_type;
2358 lop->nfslo_end = tmp;
2359 nfscl_insertlock(lp, other_lop, lop, local);
2365 lop = LIST_NEXT(lop, nfslo_list);
2371 * Insert the new lock in the list at the appropriate place.
2374 nfscl_insertlock(lp, new_lop, ilop, local);
2382 * This function must be run as a kernel thread.
2383 * It does Renew Ops and recovery, when required.
2386 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2388 struct nfsclowner *owp, *nowp;
2389 struct nfsclopen *op;
2390 struct nfscllockowner *lp, *nlp;
2391 struct nfscldeleghead dh;
2392 struct nfscldeleg *dp, *ndp;
2395 int error, cbpathdown, islept, igotlock, ret, clearok;
2396 uint32_t recover_done_time = 0;
2398 static time_t prevsec = 0;
2399 struct nfscllockownerfh *lfhp, *nlfhp;
2400 struct nfscllockownerfhhead lfh;
2402 cred = newnfs_getcred();
2404 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2407 newnfs_setroot(cred);
2409 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2411 * Only allow one recover within 1/2 of the lease
2412 * duration (nfsc_renew).
2414 if (recover_done_time < NFSD_MONOSEC) {
2415 recover_done_time = NFSD_MONOSEC +
2417 nfscl_recover(clp, cred, p);
2420 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2424 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2425 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2426 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2427 clidrev = clp->nfsc_clientidrev;
2428 error = nfsrpc_renew(clp, cred, p);
2429 if (error == NFSERR_CBPATHDOWN)
2431 else if (error == NFSERR_STALECLIENTID) {
2433 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2435 } else if (error == NFSERR_EXPIRED)
2436 (void) nfscl_hasexpired(clp, clidrev, p);
2442 /* It's a Total Recall! */
2443 nfscl_totalrecall(clp);
2446 * Now, handle defunct owners.
2448 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
2449 if (LIST_EMPTY(&owp->nfsow_open)) {
2450 if (owp->nfsow_defunct != 0)
2451 nfscl_freeopenowner(owp, 0);
2456 * Do the recall on any delegations. To avoid trouble, always
2457 * come back up here after having slept.
2461 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2462 while (dp != NULL) {
2463 ndp = TAILQ_NEXT(dp, nfsdl_list);
2464 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2466 * Wait for outstanding I/O ops to be done.
2468 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2470 nfsv4_unlock(&clp->nfsc_lock, 0);
2473 dp->nfsdl_rwlock.nfslock_lock |=
2475 (void) nfsmsleep(&dp->nfsdl_rwlock,
2476 NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
2481 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2482 &islept, NFSCLSTATEMUTEXPTR, NULL);
2487 newnfs_copycred(&dp->nfsdl_cred, cred);
2488 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2491 nfscl_cleandeleg(dp);
2492 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2494 LIST_REMOVE(dp, nfsdl_hash);
2495 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2497 newnfsstats.cldelegates--;
2505 * Clear out old delegations, if we are above the high water
2506 * mark. Only clear out ones with no state related to them.
2507 * The tailq list is in LRU order.
2509 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2510 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2511 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2512 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2513 dp->nfsdl_rwlock.nfslock_lock == 0 &&
2514 dp->nfsdl_timestamp < NFSD_MONOSEC &&
2515 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2516 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2518 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2519 op = LIST_FIRST(&owp->nfsow_open);
2526 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2527 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2534 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2535 LIST_REMOVE(dp, nfsdl_hash);
2536 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2538 newnfsstats.cldelegates--;
2544 nfsv4_unlock(&clp->nfsc_lock, 0);
2548 * Delegreturn any delegations cleaned out or recalled.
2550 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
2551 newnfs_copycred(&dp->nfsdl_cred, cred);
2552 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2553 TAILQ_REMOVE(&dh, dp, nfsdl_list);
2554 FREE((caddr_t)dp, M_NFSCLDELEG);
2559 * Call nfscl_cleanupkext() once per second to check for
2560 * open/lock owners where the process has exited.
2562 mytime = NFSD_MONOSEC;
2563 if (prevsec != mytime) {
2565 nfscl_cleanupkext(clp, &lfh);
2569 * Do a ReleaseLockOwner for all lock owners where the
2570 * associated process no longer exists, as found by
2571 * nfscl_cleanupkext().
2573 newnfs_setroot(cred);
2574 SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
2575 LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
2577 (void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
2578 lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
2580 nfscl_freelockowner(lp, 0);
2587 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
2588 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
2590 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
2591 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
2594 wakeup((caddr_t)clp);
2602 * Initiate state recovery. Called when NFSERR_STALECLIENTID or
2603 * NFSERR_STALESTATEID is received.
2606 nfscl_initiate_recovery(struct nfsclclient *clp)
2612 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2614 wakeup((caddr_t)clp);
2618 * Dump out the state stuff for debugging.
2621 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
2622 int lockowner, int locks)
2624 struct nfsclclient *clp;
2625 struct nfsclowner *owp;
2626 struct nfsclopen *op;
2627 struct nfscllockowner *lp;
2628 struct nfscllock *lop;
2629 struct nfscldeleg *dp;
2633 printf("nfscl dumpstate NULL clp\n");
2637 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2638 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2639 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2640 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2641 owp->nfsow_owner[0], owp->nfsow_owner[1],
2642 owp->nfsow_owner[2], owp->nfsow_owner[3],
2644 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2646 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2647 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2648 op->nfso_stateid.other[2], op->nfso_opencnt,
2650 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2652 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2653 lp->nfsl_owner[0], lp->nfsl_owner[1],
2654 lp->nfsl_owner[2], lp->nfsl_owner[3],
2656 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2657 lp->nfsl_stateid.other[2]);
2658 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2661 printf("lck typ=%d fst=%ju end=%ju\n",
2662 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2663 (intmax_t)lop->nfslo_end);
2665 printf("lck typ=%d fst=%qd end=%qd\n",
2666 lop->nfslo_type, lop->nfslo_first,
2674 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2675 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2676 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2677 owp->nfsow_owner[0], owp->nfsow_owner[1],
2678 owp->nfsow_owner[2], owp->nfsow_owner[3],
2680 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2682 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2683 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2684 op->nfso_stateid.other[2], op->nfso_opencnt,
2686 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2688 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2689 lp->nfsl_owner[0], lp->nfsl_owner[1],
2690 lp->nfsl_owner[2], lp->nfsl_owner[3],
2692 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2693 lp->nfsl_stateid.other[2]);
2694 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2697 printf("lck typ=%d fst=%ju end=%ju\n",
2698 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2699 (intmax_t)lop->nfslo_end);
2701 printf("lck typ=%d fst=%qd end=%qd\n",
2702 lop->nfslo_type, lop->nfslo_first,
2713 * Check for duplicate open owners and opens.
2714 * (Only used as a diagnostic aid.)
2717 nfscl_dupopen(vnode_t vp, int dupopens)
2719 struct nfsclclient *clp;
2720 struct nfsclowner *owp, *owp2;
2721 struct nfsclopen *op, *op2;
2724 clp = VFSTONFS(vnode_mount(vp))->nm_clp;
2726 printf("nfscl dupopen NULL clp\n");
2729 nfhp = VTONFS(vp)->n_fhp;
2733 * First, search for duplicate owners.
2734 * These should never happen!
2736 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2737 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2739 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
2740 NFSV4CL_LOCKNAMELEN)) {
2742 printf("DUP OWNER\n");
2743 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
2750 * Now, search for duplicate stateids.
2751 * These shouldn't happen, either.
2753 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2754 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2755 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2756 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2758 (op->nfso_stateid.other[0] != 0 ||
2759 op->nfso_stateid.other[1] != 0 ||
2760 op->nfso_stateid.other[2] != 0) &&
2761 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
2762 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
2763 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
2765 printf("DUP STATEID\n");
2766 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
2776 * Now search for duplicate opens.
2777 * Duplicate opens for the same owner
2778 * should never occur. Other duplicates are
2779 * possible and are checked for if "dupopens"
2782 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2783 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2784 if (nfhp->nfh_len == op2->nfso_fhlen &&
2785 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
2786 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2787 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2788 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
2789 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
2790 (!NFSBCMP(op->nfso_own->nfsow_owner,
2791 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
2793 if (!NFSBCMP(op->nfso_own->nfsow_owner,
2794 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
2796 printf("BADDUP OPEN\n");
2799 printf("DUP OPEN\n");
2801 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
2814 * During close, find an open that needs to be dereferenced and
2815 * dereference it. If there are no more opens for this file,
2816 * log a message to that effect.
2817 * Opens aren't actually Close'd until VOP_INACTIVE() is performed
2818 * on the file's vnode.
2819 * This is the safe way, since it is difficult to identify
2820 * which open the close is for and I/O can be performed after the
2821 * close(2) system call when a file is mmap'd.
2822 * If it returns 0 for success, there will be a referenced
2823 * clp returned via clpp.
2826 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
2828 struct nfsclclient *clp;
2829 struct nfsclowner *owp;
2830 struct nfsclopen *op;
2831 struct nfscldeleg *dp;
2835 error = nfscl_getcl(vp, NULL, NULL, &clp);
2840 nfhp = VTONFS(vp)->n_fhp;
2844 * First, look for one under a delegation that was locally issued
2845 * and just decrement the opencnt for it. Since all my Opens against
2846 * the server are DENY_NONE, I don't see a problem with hanging
2847 * onto them. (It is much easier to use one of the extant Opens
2848 * that I already have on the server when a Delegation is recalled
2849 * than to do fresh Opens.) Someday, I might need to rethink this, but.
2851 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
2853 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2854 op = LIST_FIRST(&owp->nfsow_open);
2857 * Since a delegation is for a file, there
2858 * should never be more than one open for
2861 if (LIST_NEXT(op, nfso_list) != NULL)
2862 panic("nfscdeleg opens");
2863 if (notdecr && op->nfso_opencnt > 0) {
2872 /* Now process the opens against the server. */
2873 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2874 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2875 if (op->nfso_fhlen == nfhp->nfh_len &&
2876 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
2878 /* Found an open, decrement cnt if possible */
2879 if (notdecr && op->nfso_opencnt > 0) {
2884 * There are more opens, so just return.
2886 if (op->nfso_opencnt > 0) {
2895 printf("nfscl: never fnd open\n");
2900 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
2902 struct nfsclclient *clp;
2903 struct nfsclowner *owp, *nowp;
2904 struct nfsclopen *op;
2905 struct nfscldeleg *dp;
2909 error = nfscl_getcl(vp, NULL, NULL, &clp);
2914 nfhp = VTONFS(vp)->n_fhp;
2917 * First get rid of the local Open structures, which should be no
2920 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
2922 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
2923 op = LIST_FIRST(&owp->nfsow_open);
2925 KASSERT((op->nfso_opencnt == 0),
2926 ("nfscl: bad open cnt on deleg"));
2927 nfscl_freeopen(op, 1);
2929 nfscl_freeopenowner(owp, 1);
2933 /* Now process the opens against the server. */
2935 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2936 op = LIST_FIRST(&owp->nfsow_open);
2937 while (op != NULL) {
2938 if (op->nfso_fhlen == nfhp->nfh_len &&
2939 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
2941 /* Found an open, close it. */
2942 KASSERT((op->nfso_opencnt == 0),
2943 ("nfscl: bad open cnt on server"));
2945 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
2950 op = LIST_NEXT(op, nfso_list);
2958 * Return all delegations on this client.
2959 * (Must be called with client sleep lock.)
2962 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
2964 struct nfscldeleg *dp, *ndp;
2967 cred = newnfs_getcred();
2968 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
2969 nfscl_cleandeleg(dp);
2970 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2971 nfscl_freedeleg(&clp->nfsc_deleg, dp);
2977 * Do a callback RPC.
2980 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
2984 struct nfsclclient *clp;
2985 struct nfscldeleg *dp = NULL;
2986 int numops, taglen = -1, error = 0, trunc, ret = 0;
2987 u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident;
2988 u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
2994 nfsattrbit_t attrbits, rattrbits;
2995 nfsv4stateid_t stateid;
2998 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
2999 taglen = fxdr_unsigned(int, *tl);
3004 if (taglen <= NFSV4_SMALLSTR)
3007 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3008 error = nfsrv_mtostr(nd, tagstr, taglen);
3010 if (taglen > NFSV4_SMALLSTR)
3011 free(tagstr, M_TEMP);
3015 (void) nfsm_strtom(nd, tag, taglen);
3016 if (taglen > NFSV4_SMALLSTR) {
3017 free(tagstr, M_TEMP);
3019 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3020 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3021 minorvers = fxdr_unsigned(u_int32_t, *tl++);
3022 if (minorvers != NFSV4_MINORVERSION)
3023 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3024 cbident = fxdr_unsigned(u_int32_t, *tl++);
3028 numops = fxdr_unsigned(int, *tl);
3030 * Loop around doing the sub ops.
3032 for (i = 0; i < numops; i++) {
3033 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3034 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3036 op = fxdr_unsigned(int, *tl);
3037 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) {
3038 nd->nd_repstat = NFSERR_OPILLEGAL;
3039 *repp = nfscl_errmap(nd);
3043 nd->nd_procnum = op;
3044 newnfsstats.cbrpccnt[nd->nd_procnum]++;
3046 case NFSV4OP_CBGETATTR:
3048 error = nfsm_getfh(nd, &nfhp);
3050 error = nfsrv_getattrbits(nd, &attrbits,
3053 mp = nfscl_getmnt(cbident);
3055 error = NFSERR_SERVERFAULT;
3060 clp = nfscl_findcl(VFSTONFS(mp));
3062 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3066 error = NFSERR_SERVERFAULT;
3069 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3070 nfhp->nfh_len, p, &np);
3075 FREE((caddr_t)nfhp, M_NFSFH);
3077 NFSZERO_ATTRBIT(&rattrbits);
3078 if (NFSISSET_ATTRBIT(&attrbits,
3081 va.va_size = np->n_size;
3083 va.va_size = dp->nfsdl_size;
3084 NFSSETBIT_ATTRBIT(&rattrbits,
3087 if (NFSISSET_ATTRBIT(&attrbits,
3088 NFSATTRBIT_CHANGE)) {
3089 va.va_filerev = dp->nfsdl_change;
3090 if (ret || (np->n_flag & NDELEGMOD))
3092 NFSSETBIT_ATTRBIT(&rattrbits,
3095 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3096 NULL, 0, &rattrbits, NULL, NULL, 0, 0, 0, 0,
3102 case NFSV4OP_CBRECALL:
3104 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3106 stateid.seqid = *tl++;
3107 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3109 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3110 trunc = fxdr_unsigned(int, *tl);
3111 error = nfsm_getfh(nd, &nfhp);
3113 mp = nfscl_getmnt(cbident);
3115 error = NFSERR_SERVERFAULT;
3119 clp = nfscl_findcl(VFSTONFS(mp));
3121 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3123 if (dp != NULL && (dp->nfsdl_flags &
3124 NFSCLDL_DELEGRET) == 0) {
3127 wakeup((caddr_t)clp);
3130 error = NFSERR_SERVERFAULT;
3135 FREE((caddr_t)nfhp, M_NFSFH);
3139 if (error == EBADRPC || error == NFSERR_BADXDR) {
3140 nd->nd_repstat = NFSERR_BADXDR;
3142 nd->nd_repstat = error;
3147 if (nd->nd_repstat) {
3148 *repp = nfscl_errmap(nd);
3151 *repp = 0; /* NFS4_OK */
3155 if (error == EBADRPC || error == NFSERR_BADXDR)
3156 nd->nd_repstat = NFSERR_BADXDR;
3158 printf("nfsv4 comperr1=%d\n", error);
3161 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3165 *retopsp = txdr_unsigned(retops);
3167 *nd->nd_errp = nfscl_errmap(nd);
3171 * Generate the next cbident value. Basically just increment a static value
3172 * and then check that it isn't already in the list, if it has wrapped around.
3175 nfscl_nextcbident(void)
3177 struct nfsclclient *clp;
3179 static u_int32_t nextcbident = 0;
3180 static int haswrapped = 0;
3183 if (nextcbident == 0)
3187 * Search the clientid list for one already using this cbident.
3192 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3193 if (clp->nfsc_cbident == nextcbident) {
3203 return (nextcbident);
3207 * Get the mount point related to a given cbident.
3210 nfscl_getmnt(u_int32_t cbident)
3212 struct nfsclclient *clp;
3213 struct nfsmount *nmp;
3216 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3217 if (clp->nfsc_cbident == cbident)
3224 nmp = clp->nfsc_nmp;
3226 return (nmp->nm_mountp);
3230 * Search for a lock conflict locally on the client. A conflict occurs if
3231 * - not same owner and overlapping byte range and at least one of them is
3232 * a write lock or this is an unlock.
3235 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
3236 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
3237 struct nfscllock **lopp)
3239 struct nfsclowner *owp;
3240 struct nfsclopen *op;
3244 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
3248 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3249 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3250 if (op->nfso_fhlen == fhlen &&
3251 !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
3252 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
3263 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
3264 u_int8_t *own, struct nfscllock **lopp)
3266 struct nfscllockowner *lp;
3267 struct nfscllock *lop;
3269 LIST_FOREACH(lp, lhp, nfsl_list) {
3270 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
3271 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3272 if (lop->nfslo_first >= nlop->nfslo_end)
3274 if (lop->nfslo_end <= nlop->nfslo_first)
3276 if (lop->nfslo_type == F_WRLCK ||
3277 nlop->nfslo_type == F_WRLCK ||
3278 nlop->nfslo_type == F_UNLCK) {
3281 return (NFSERR_DENIED);
3290 * Check for a local conflicting lock.
3293 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
3294 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
3296 struct nfscllock *lop, nlck;
3297 struct nfscldeleg *dp;
3299 u_int8_t own[NFSV4CL_LOCKNAMELEN];
3302 nlck.nfslo_type = fl->l_type;
3303 nlck.nfslo_first = off;
3304 if (len == NFS64BITSSET) {
3305 nlck.nfslo_end = NFS64BITSSET;
3307 nlck.nfslo_end = off + len;
3308 if (nlck.nfslo_end <= nlck.nfslo_first)
3309 return (NFSERR_INVAL);
3312 nfscl_filllockowner(id, own, flags);
3314 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3315 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
3316 &nlck, own, dp, &lop);
3318 fl->l_whence = SEEK_SET;
3319 fl->l_start = lop->nfslo_first;
3320 if (lop->nfslo_end == NFS64BITSSET)
3323 fl->l_len = lop->nfslo_end - lop->nfslo_first;
3324 fl->l_pid = (pid_t)0;
3325 fl->l_type = lop->nfslo_type;
3326 error = -1; /* no RPC required */
3327 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
3328 fl->l_type == F_RDLCK)) {
3330 * The delegation ensures that there isn't a conflicting
3331 * lock on the server, so return -1 to indicate an RPC
3334 fl->l_type = F_UNLCK;
3342 * Handle Recall of a delegation.
3343 * The clp must be exclusive locked when this is called.
3346 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
3347 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
3348 int called_from_renewthread)
3350 struct nfsclowner *owp, *lowp, *nowp;
3351 struct nfsclopen *op, *lop;
3352 struct nfscllockowner *lp;
3353 struct nfscllock *lckp;
3355 int error = 0, ret, gotvp = 0;
3359 * First, get a vnode for the file. This is needed to do RPCs.
3361 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
3362 dp->nfsdl_fhlen, p, &np);
3365 * File isn't open, so nothing to move over to the
3375 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
3378 * Ok, if it's a write delegation, flush data to the server, so
3379 * that close/open consistency is retained.
3383 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
3384 np->n_flag |= NDELEGRECALL;
3386 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1,
3387 called_from_renewthread);
3389 np->n_flag &= ~NDELEGRECALL;
3391 NFSINVALATTRCACHE(np);
3393 if (ret == EIO && called_from_renewthread != 0) {
3395 * If the flush failed with EIO for the renew thread,
3396 * return now, so that the dirty buffer will be flushed
3405 * Now, for each openowner with opens issued locally, move them
3406 * over to state against the server.
3408 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
3409 lop = LIST_FIRST(&lowp->nfsow_open);
3411 if (LIST_NEXT(lop, nfso_list) != NULL)
3412 panic("nfsdlg mult opens");
3414 * Look for the same openowner against the server.
3416 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3417 if (!NFSBCMP(lowp->nfsow_owner,
3418 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3419 newnfs_copycred(&dp->nfsdl_cred, cred);
3420 ret = nfscl_moveopen(vp, clp, nmp, lop,
3422 if (ret == NFSERR_STALECLIENTID ||
3423 ret == NFSERR_STALEDONTRECOVER) {
3429 nfscl_freeopen(lop, 1);
3438 * If no openowner found, create one and get an open
3442 MALLOC(nowp, struct nfsclowner *,
3443 sizeof (struct nfsclowner), M_NFSCLOWNER,
3445 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
3446 NULL, lowp->nfsow_owner, dp->nfsdl_fh,
3447 dp->nfsdl_fhlen, NULL);
3448 newnfs_copycred(&dp->nfsdl_cred, cred);
3449 ret = nfscl_moveopen(vp, clp, nmp, lop,
3452 nfscl_freeopenowner(owp, 0);
3453 if (ret == NFSERR_STALECLIENTID ||
3454 ret == NFSERR_STALEDONTRECOVER) {
3460 nfscl_freeopen(lop, 1);
3470 * Now, get byte range locks for any locks done locally.
3472 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
3473 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
3474 newnfs_copycred(&dp->nfsdl_cred, cred);
3475 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
3476 if (ret == NFSERR_STALESTATEID ||
3477 ret == NFSERR_STALEDONTRECOVER ||
3478 ret == NFSERR_STALECLIENTID) {
3493 * Move a locally issued open over to an owner on the state list.
3494 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
3495 * returns with it unlocked.
3498 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
3499 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
3500 struct ucred *cred, NFSPROC_T *p)
3502 struct nfsclopen *op, *nop;
3503 struct nfscldeleg *ndp;
3505 int error = 0, newone;
3508 * First, look for an appropriate open, If found, just increment the
3511 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3512 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
3513 op->nfso_fhlen == lop->nfso_fhlen &&
3514 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
3515 op->nfso_opencnt += lop->nfso_opencnt;
3516 nfscl_freeopen(lop, 1);
3521 /* No appropriate open, so we have to do one against the server. */
3523 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
3524 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
3526 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
3527 lop->nfso_fh, lop->nfso_fhlen, &newone);
3529 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
3530 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
3531 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
3534 nfscl_freeopen(op, 0);
3537 newnfs_copyincred(cred, &op->nfso_cred);
3538 op->nfso_mode |= lop->nfso_mode;
3539 op->nfso_opencnt += lop->nfso_opencnt;
3540 nfscl_freeopen(lop, 1);
3543 FREE((caddr_t)nop, M_NFSCLOPEN);
3546 * What should I do with the returned delegation, since the
3547 * delegation is being recalled? For now, just printf and
3550 printf("Moveopen returned deleg\n");
3551 FREE((caddr_t)ndp, M_NFSCLDELEG);
3557 * Recall all delegations on this client.
3560 nfscl_totalrecall(struct nfsclclient *clp)
3562 struct nfscldeleg *dp;
3564 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
3565 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
3566 dp->nfsdl_flags |= NFSCLDL_RECALL;
3571 * Relock byte ranges. Called for delegation recall and state expiry.
3574 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
3575 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
3578 struct nfscllockowner *nlp;
3581 u_int32_t clidrev = 0;
3582 int error, newone, donelocally;
3584 off = lop->nfslo_first;
3585 len = lop->nfslo_end - lop->nfslo_first;
3586 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
3587 clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
3588 lp->nfsl_openowner, &nlp, &newone, &donelocally);
3589 if (error || donelocally)
3591 if (nmp->nm_clp != NULL)
3592 clidrev = nmp->nm_clp->nfsc_clientidrev;
3595 nfhp = VTONFS(vp)->n_fhp;
3596 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
3597 nfhp->nfh_len, nlp, newone, 0, off,
3598 len, lop->nfslo_type, cred, p);
3600 nfscl_freelockowner(nlp, 0);
3605 * Called to re-open a file. Basically get a vnode for the file handle
3606 * and then call nfsrpc_openrpc() to do the rest.
3609 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
3610 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
3611 struct ucred *cred, NFSPROC_T *p)
3617 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
3621 if (np->n_v4 != NULL) {
3622 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
3623 np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
3624 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
3634 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
3635 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
3639 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
3640 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
3641 u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
3642 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
3647 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
3648 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
3650 if (error == NFSERR_DELAY)
3651 (void) nfs_catnap(PZERO, error, "nfstryop");
3652 } while (error == NFSERR_DELAY);
3653 if (error == EAUTH || error == EACCES) {
3654 /* Try again using system credentials */
3655 newnfs_setroot(cred);
3657 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
3658 newfhlen, mode, op, name, namelen, ndpp, reclaim,
3659 delegtype, cred, p, 1, 0);
3660 if (error == NFSERR_DELAY)
3661 (void) nfs_catnap(PZERO, error, "nfstryop");
3662 } while (error == NFSERR_DELAY);
3668 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
3669 * NFSERR_DELAY. Also, retry with system credentials, if the provided
3673 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
3674 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
3675 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
3677 struct nfsrv_descript nfsd, *nd = &nfsd;
3681 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
3682 reclaim, off, len, type, cred, p, 0);
3683 if (!error && nd->nd_repstat == NFSERR_DELAY)
3684 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
3686 } while (!error && nd->nd_repstat == NFSERR_DELAY);
3688 error = nd->nd_repstat;
3689 if (error == EAUTH || error == EACCES) {
3690 /* Try again using root credentials */
3691 newnfs_setroot(cred);
3693 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
3694 newone, reclaim, off, len, type, cred, p, 1);
3695 if (!error && nd->nd_repstat == NFSERR_DELAY)
3696 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
3698 } while (!error && nd->nd_repstat == NFSERR_DELAY);
3700 error = nd->nd_repstat;
3706 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
3707 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
3711 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
3712 struct nfsmount *nmp, NFSPROC_T *p)
3717 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
3718 if (error == NFSERR_DELAY)
3719 (void) nfs_catnap(PZERO, error, "nfstrydp");
3720 } while (error == NFSERR_DELAY);
3721 if (error == EAUTH || error == EACCES) {
3722 /* Try again using system credentials */
3723 newnfs_setroot(cred);
3725 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
3726 if (error == NFSERR_DELAY)
3727 (void) nfs_catnap(PZERO, error, "nfstrydp");
3728 } while (error == NFSERR_DELAY);
3734 * Try a close against the server. Just call nfsrpc_closerpc(),
3735 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
3739 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
3740 struct nfsmount *nmp, NFSPROC_T *p)
3742 struct nfsrv_descript nfsd, *nd = &nfsd;
3746 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
3747 if (error == NFSERR_DELAY)
3748 (void) nfs_catnap(PZERO, error, "nfstrycl");
3749 } while (error == NFSERR_DELAY);
3750 if (error == EAUTH || error == EACCES) {
3751 /* Try again using system credentials */
3752 newnfs_setroot(cred);
3754 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
3755 if (error == NFSERR_DELAY)
3756 (void) nfs_catnap(PZERO, error, "nfstrycl");
3757 } while (error == NFSERR_DELAY);
3763 * Decide if a delegation on a file permits close without flushing writes
3764 * to the server. This might be a big performance win in some environments.
3765 * (Not useful until the client does caching on local stable storage.)
3768 nfscl_mustflush(vnode_t vp)
3770 struct nfsclclient *clp;
3771 struct nfscldeleg *dp;
3773 struct nfsmount *nmp;
3776 nmp = VFSTONFS(vnode_mount(vp));
3777 if (!NFSHASNFSV4(nmp))
3780 clp = nfscl_findcl(nmp);
3785 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3786 if (dp != NULL && (dp->nfsdl_flags &
3787 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
3789 (dp->nfsdl_sizelimit >= np->n_size ||
3790 !NFSHASSTRICT3530(nmp))) {
3799 * See if a (write) delegation exists for this file.
3802 nfscl_nodeleg(vnode_t vp, int writedeleg)
3804 struct nfsclclient *clp;
3805 struct nfscldeleg *dp;
3807 struct nfsmount *nmp;
3810 nmp = VFSTONFS(vnode_mount(vp));
3811 if (!NFSHASNFSV4(nmp))
3814 clp = nfscl_findcl(nmp);
3819 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3821 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
3822 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
3832 * Look for an associated delegation that should be DelegReturned.
3835 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
3837 struct nfsclclient *clp;
3838 struct nfscldeleg *dp;
3839 struct nfsclowner *owp;
3840 struct nfscllockowner *lp;
3841 struct nfsmount *nmp;
3844 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
3846 nmp = VFSTONFS(vnode_mount(vp));
3850 * Loop around waiting for:
3851 * - outstanding I/O operations on delegations to complete
3852 * - for a delegation on vp that has state, lock the client and
3854 * - return delegation with no state
3857 clp = nfscl_findcl(nmp);
3862 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
3863 np->n_fhp->nfh_len);
3866 * Wait for outstanding I/O ops to be done.
3868 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
3870 nfsv4_unlock(&clp->nfsc_lock, 0);
3873 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
3874 (void) nfsmsleep(&dp->nfsdl_rwlock,
3875 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
3879 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3880 if (!LIST_EMPTY(&owp->nfsow_open)) {
3886 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
3887 if (!LIST_EMPTY(&lp->nfsl_lock)) {
3893 if (needsrecall && !triedrecall) {
3894 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
3897 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
3898 &islept, NFSCLSTATEMUTEXPTR, NULL);
3905 cred = newnfs_getcred();
3906 newnfs_copycred(&dp->nfsdl_cred, cred);
3907 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
3911 nfsv4_unlock(&clp->nfsc_lock, 0);
3915 *stp = dp->nfsdl_stateid;
3917 nfscl_cleandeleg(dp);
3918 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3921 nfsv4_unlock(&clp->nfsc_lock, 0);
3928 * Look for associated delegation(s) that should be DelegReturned.
3931 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
3932 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
3934 struct nfsclclient *clp;
3935 struct nfscldeleg *dp;
3936 struct nfsclowner *owp;
3937 struct nfscllockowner *lp;
3938 struct nfsmount *nmp;
3941 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
3943 nmp = VFSTONFS(vnode_mount(fvp));
3948 * Loop around waiting for:
3949 * - outstanding I/O operations on delegations to complete
3950 * - for a delegation on fvp that has state, lock the client and
3952 * - return delegation(s) with no state.
3955 clp = nfscl_findcl(nmp);
3961 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
3962 np->n_fhp->nfh_len);
3963 if (dp != NULL && *gotfdp == 0) {
3965 * Wait for outstanding I/O ops to be done.
3967 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
3969 nfsv4_unlock(&clp->nfsc_lock, 0);
3972 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
3973 (void) nfsmsleep(&dp->nfsdl_rwlock,
3974 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
3978 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3979 if (!LIST_EMPTY(&owp->nfsow_open)) {
3985 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
3986 if (!LIST_EMPTY(&lp->nfsl_lock)) {
3992 if (needsrecall && !triedrecall) {
3993 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
3996 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
3997 &islept, NFSCLSTATEMUTEXPTR, NULL);
4004 cred = newnfs_getcred();
4005 newnfs_copycred(&dp->nfsdl_cred, cred);
4006 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
4010 nfsv4_unlock(&clp->nfsc_lock, 0);
4014 *fstp = dp->nfsdl_stateid;
4017 nfscl_cleandeleg(dp);
4018 nfscl_freedeleg(&clp->nfsc_deleg, dp);
4021 nfsv4_unlock(&clp->nfsc_lock, 0);
4026 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4027 np->n_fhp->nfh_len);
4028 if (dp != NULL && *gottdp == 0) {
4030 * Wait for outstanding I/O ops to be done.
4032 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4033 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4034 (void) nfsmsleep(&dp->nfsdl_rwlock,
4035 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4038 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4039 if (!LIST_EMPTY(&owp->nfsow_open)) {
4044 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4045 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4050 *tstp = dp->nfsdl_stateid;
4053 nfscl_cleandeleg(dp);
4054 nfscl_freedeleg(&clp->nfsc_deleg, dp);
4063 * Get a reference on the clientid associated with the mount point.
4064 * Return 1 if success, 0 otherwise.
4067 nfscl_getref(struct nfsmount *nmp)
4069 struct nfsclclient *clp;
4072 clp = nfscl_findcl(nmp);
4077 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
4083 * Release a reference on a clientid acquired with the above call.
4086 nfscl_relref(struct nfsmount *nmp)
4088 struct nfsclclient *clp;
4091 clp = nfscl_findcl(nmp);
4096 nfsv4_relref(&clp->nfsc_lock);
4101 * Save the size attribute in the delegation, since the nfsnode
4105 nfscl_reclaimnode(vnode_t vp)
4107 struct nfsclclient *clp;
4108 struct nfscldeleg *dp;
4109 struct nfsnode *np = VTONFS(vp);
4110 struct nfsmount *nmp;
4112 nmp = VFSTONFS(vnode_mount(vp));
4113 if (!NFSHASNFSV4(nmp))
4116 clp = nfscl_findcl(nmp);
4121 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4122 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4123 dp->nfsdl_size = np->n_size;
4128 * Get the saved size attribute in the delegation, since it is a
4129 * newly allocated nfsnode.
4132 nfscl_newnode(vnode_t vp)
4134 struct nfsclclient *clp;
4135 struct nfscldeleg *dp;
4136 struct nfsnode *np = VTONFS(vp);
4137 struct nfsmount *nmp;
4139 nmp = VFSTONFS(vnode_mount(vp));
4140 if (!NFSHASNFSV4(nmp))
4143 clp = nfscl_findcl(nmp);
4148 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4149 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4150 np->n_size = dp->nfsdl_size;
4155 * If there is a valid write delegation for this file, set the modtime
4156 * to the local clock time.
4159 nfscl_delegmodtime(vnode_t vp)
4161 struct nfsclclient *clp;
4162 struct nfscldeleg *dp;
4163 struct nfsnode *np = VTONFS(vp);
4164 struct nfsmount *nmp;
4166 nmp = VFSTONFS(vnode_mount(vp));
4167 if (!NFSHASNFSV4(nmp))
4170 clp = nfscl_findcl(nmp);
4175 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4176 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
4177 nanotime(&dp->nfsdl_modtime);
4178 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
4184 * If there is a valid write delegation for this file with a modtime set,
4185 * put that modtime in mtime.
4188 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
4190 struct nfsclclient *clp;
4191 struct nfscldeleg *dp;
4192 struct nfsnode *np = VTONFS(vp);
4193 struct nfsmount *nmp;
4195 nmp = VFSTONFS(vnode_mount(vp));
4196 if (!NFSHASNFSV4(nmp))
4199 clp = nfscl_findcl(nmp);
4204 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4206 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
4207 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
4208 *mtime = dp->nfsdl_modtime;
4213 nfscl_errmap(struct nfsrv_descript *nd)
4215 short *defaulterrp, *errp;
4217 if (!nd->nd_repstat)
4219 if (nd->nd_procnum == NFSPROC_NOOP)
4220 return (txdr_unsigned(nd->nd_repstat & 0xffff));
4221 if (nd->nd_repstat == EBADRPC)
4222 return (txdr_unsigned(NFSERR_BADXDR));
4223 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
4224 nd->nd_repstat == NFSERR_OPILLEGAL)
4225 return (txdr_unsigned(nd->nd_repstat));
4226 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
4228 if (*errp == (short)nd->nd_repstat)
4229 return (txdr_unsigned(nd->nd_repstat));
4230 return (txdr_unsigned(*defaulterrp));