2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
43 * These functions support the macros and help fiddle mbuf chains for
44 * the nfs op functions. They do things like create the rpc header and
45 * copy data between mbuf chains and uio lists.
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
54 #include <sys/mount.h>
55 #include <sys/vnode.h>
56 #include <sys/namei.h>
58 #include <sys/socket.h>
60 #include <sys/malloc.h>
61 #include <sys/sysent.h>
62 #include <sys/syscall.h>
63 #include <sys/sysproto.h>
66 #include <vm/vm_object.h>
67 #include <vm/vm_extern.h>
70 #include <nfs/rpcv2.h>
71 #include <nfs/nfsproto.h>
72 #include <nfsclient/nfs.h>
73 #include <nfsclient/nfsnode.h>
74 #include <nfs/xdr_subs.h>
75 #include <nfsclient/nfsm_subs.h>
76 #include <nfsclient/nfsmount.h>
78 #include <netinet/in.h>
81 * Data items converted to xdr at startup, since they are constant
82 * This is kinda hokey, but may save a little time doing byte swaps
84 u_int32_t nfs_xdrneg1;
85 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
86 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted;
87 u_int32_t nfs_true, nfs_false;
89 /* And other global data */
90 static u_int32_t nfs_xid = 0;
91 static enum vtype nv2tov_type[8]= {
92 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
96 int nfs_pbuf_freecnt = -1; /* start out unlimited */
98 struct nfs_reqq nfs_reqq;
99 struct nfs_bufq nfs_bufq;
101 static int nfs_prev_nfsclnt_sy_narg;
102 static sy_call_t *nfs_prev_nfsclnt_sy_call;
105 * and the reverse mapping from generic to Version 2 procedure numbers
107 int nfsv2_procid[NFS_NPROCS] = {
133 LIST_HEAD(nfsnodehashhead, nfsnode);
136 * Create the header for an rpc request packet
137 * The hsiz is the size of the rest of the nfs request header.
138 * (just used to decide if a cluster is a good idea)
141 nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz)
145 MGET(mb, M_TRYWAIT, MT_DATA);
146 if (hsiz >= MINCLSIZE)
147 MCLGET(mb, M_TRYWAIT);
153 * Build the RPC header and fill in the authorization info.
154 * The authorization string argument is only used when the credentials
155 * come from outside of the kernel.
156 * Returns the head of the mbuf list.
159 nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type,
160 int auth_len, struct mbuf *mrest, int mrest_len, struct mbuf **mbp,
170 authsiz = nfsm_rndup(auth_len);
171 MGETHDR(mb, M_TRYWAIT, MT_DATA);
172 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
173 MCLGET(mb, M_TRYWAIT);
174 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
175 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
177 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
181 bpos = mtod(mb, caddr_t);
184 * First the RPC header.
186 tl = nfsm_build(u_int32_t *, 8 * NFSX_UNSIGNED);
188 /* Get a pretty random xid to start with */
192 * Skip zero xid if it should ever happen.
197 *tl++ = *xidp = txdr_unsigned(nfs_xid);
200 *tl++ = txdr_unsigned(NFS_PROG);
201 if (nmflag & NFSMNT_NFSV3) {
202 *tl++ = txdr_unsigned(NFS_VER3);
203 *tl++ = txdr_unsigned(procid);
205 *tl++ = txdr_unsigned(NFS_VER2);
206 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
210 * And then the authorization cred.
212 *tl++ = txdr_unsigned(auth_type);
213 *tl = txdr_unsigned(authsiz);
216 tl = nfsm_build(u_int32_t *, auth_len);
217 *tl++ = 0; /* stamp ?? */
218 *tl++ = 0; /* NULL hostname */
219 *tl++ = txdr_unsigned(cr->cr_uid);
220 *tl++ = txdr_unsigned(cr->cr_groups[0]);
221 grpsiz = (auth_len >> 2) - 5;
222 *tl++ = txdr_unsigned(grpsiz);
223 for (i = 1; i <= grpsiz; i++)
224 *tl++ = txdr_unsigned(cr->cr_groups[i]);
229 * And the verifier...
231 tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
232 *tl++ = txdr_unsigned(RPCAUTH_NULL);
235 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
236 mreq->m_pkthdr.rcvif = NULL;
242 * copies a uio scatter/gather list to an mbuf chain.
243 * NOTE: can ony handle iovcnt == 1
246 nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos)
249 struct mbuf *mp, *mp2;
250 int xfer, left, mlen;
251 int uiosiz, clflg, rem;
255 if (uiop->uio_iovcnt != 1)
256 panic("nfsm_uiotombuf: iovcnt != 1");
259 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
263 rem = nfsm_rndup(siz)-siz;
266 left = uiop->uio_iov->iov_len;
267 uiocp = uiop->uio_iov->iov_base;
272 mlen = M_TRAILINGSPACE(mp);
274 MGET(mp, M_TRYWAIT, MT_DATA);
276 MCLGET(mp, M_TRYWAIT);
280 mlen = M_TRAILINGSPACE(mp);
282 xfer = (left > mlen) ? mlen : left;
285 if (uiop->uio_iov->iov_op != NULL)
286 (*(uiop->uio_iov->iov_op))
287 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
290 if (uiop->uio_segflg == UIO_SYSSPACE)
291 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
293 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
297 uiop->uio_offset += xfer;
298 uiop->uio_resid -= xfer;
300 uiop->uio_iov->iov_base += uiosiz;
301 uiop->uio_iov->iov_len -= uiosiz;
305 if (rem > M_TRAILINGSPACE(mp)) {
306 MGET(mp, M_TRYWAIT, MT_DATA);
310 cp = mtod(mp, caddr_t)+mp->m_len;
311 for (left = 0; left < rem; left++)
316 *bpos = mtod(mp, caddr_t)+mp->m_len;
322 * Copy a string into mbufs for the hard cases...
325 nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz)
327 struct mbuf *m1 = NULL, *m2;
328 long left, xfer, len, tlen;
334 left = M_TRAILINGSPACE(m2);
336 tl = ((u_int32_t *)(*bpos));
337 *tl++ = txdr_unsigned(siz);
339 left -= NFSX_UNSIGNED;
340 m2->m_len += NFSX_UNSIGNED;
342 bcopy(cp, (caddr_t) tl, left);
349 /* Loop around adding mbufs */
351 MGET(m1, M_TRYWAIT, MT_DATA);
353 MCLGET(m1, M_TRYWAIT);
354 m1->m_len = NFSMSIZ(m1);
357 tl = mtod(m1, u_int32_t *);
360 *tl++ = txdr_unsigned(siz);
361 m1->m_len -= NFSX_UNSIGNED;
362 tlen = NFSX_UNSIGNED;
365 if (siz < m1->m_len) {
366 len = nfsm_rndup(siz);
371 xfer = len = m1->m_len;
373 bcopy(cp, (caddr_t) tl, xfer);
374 m1->m_len = len+tlen;
379 *bpos = mtod(m1, caddr_t)+m1->m_len;
384 * Called once to initialize data structures...
387 nfs_init(struct vfsconf *vfsp)
391 nfsmount_zone = uma_zcreate("NFSMOUNT", sizeof(struct nfsmount),
392 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
393 rpc_vers = txdr_unsigned(RPC_VER2);
394 rpc_call = txdr_unsigned(RPC_CALL);
395 rpc_reply = txdr_unsigned(RPC_REPLY);
396 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
397 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
398 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
399 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
400 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
401 nfs_true = txdr_unsigned(TRUE);
402 nfs_false = txdr_unsigned(FALSE);
403 nfs_xdrneg1 = txdr_unsigned(-1);
404 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
407 /* Ensure async daemons disabled */
408 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
409 nfs_iodwant[i] = NULL;
410 nfs_iodmount[i] = NULL;
412 nfs_nhinit(); /* Init the nfsnode table */
415 * Initialize reply list and start timer
417 TAILQ_INIT(&nfs_reqq);
421 nfs_prev_nfsclnt_sy_narg = sysent[SYS_nfsclnt].sy_narg;
422 sysent[SYS_nfsclnt].sy_narg = 2;
423 nfs_prev_nfsclnt_sy_call = sysent[SYS_nfsclnt].sy_call;
424 sysent[SYS_nfsclnt].sy_call = (sy_call_t *)nfsclnt;
426 nfs_pbuf_freecnt = nswbuf / 2 + 1;
432 nfs_uninit(struct vfsconf *vfsp)
435 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle);
436 sysent[SYS_nfsclnt].sy_narg = nfs_prev_nfsclnt_sy_narg;
437 sysent[SYS_nfsclnt].sy_call = nfs_prev_nfsclnt_sy_call;
442 * Attribute cache routines.
443 * nfs_loadattrcache() - loads or updates the cache contents from attributes
444 * that are on the mbuf list
445 * nfs_getattrcache() - returns valid attributes if found in cache, returns
450 * Load the attribute cache (that lives in the nfsnode entry) with
451 * the values on the mbuf list and
453 * copy the attributes to *vaper
456 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp,
457 struct vattr *vaper, int dontshrink)
459 struct vnode *vp = *vpp;
461 struct nfs_fattr *fp;
469 struct timespec mtime;
470 int v3 = NFS_ISV3(vp);
473 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
474 cp2 = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1);
477 fp = (struct nfs_fattr *)cp2;
479 vtyp = nfsv3tov_type(fp->fa_type);
480 vmode = fxdr_unsigned(u_short, fp->fa_mode);
481 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
482 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
483 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
485 vtyp = nfsv2tov_type(fp->fa_type);
486 vmode = fxdr_unsigned(u_short, fp->fa_mode);
490 * The duplicate information returned in fa_type and fa_mode
491 * is an ambiguity in the NFS version 2 protocol.
493 * VREG should be taken literally as a regular file. If a
494 * server intents to return some type information differently
495 * in the upper bits of the mode field (e.g. for sockets, or
496 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
497 * leave the examination of the mode bits even in the VREG
498 * case to avoid breakage for bogus servers, but we make sure
499 * that there are actually type bits set in the upper part of
500 * fa_mode (and failing that, trust the va_type field).
502 * NFSv3 cleared the issue, and requires fa_mode to not
503 * contain any type information (while also introduing sockets
504 * and FIFOs for fa_type).
506 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
507 vtyp = IFTOVT(vmode);
508 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
509 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
512 * Really ugly NFSv2 kludge.
514 if (vtyp == VCHR && rdev == 0xffffffff)
519 * If v_type == VNON it is a new node, so fill in the v_type,
520 * n_mtime fields. Check to see if it represents a special
521 * device, and if so, check for a possible alias. Once the
522 * correct vnode has been obtained, fill in the rest of the
526 if (vp->v_type != vtyp) {
528 if (vp->v_type == VFIFO) {
529 vp->v_op = fifo_nfsv2nodeop_p;
531 if (vp->v_type == VCHR || vp->v_type == VBLK) {
532 vp->v_op = spec_nfsv2nodeop_p;
533 vp = addaliasu(vp, rdev);
536 np->n_mtime = mtime.tv_sec;
540 vap->va_mode = (vmode & 07777);
542 vap->va_mtime = mtime;
543 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
545 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
546 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
547 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
548 vap->va_size = fxdr_hyper(&fp->fa3_size);
549 vap->va_blocksize = NFS_FABLKSIZE;
550 vap->va_bytes = fxdr_hyper(&fp->fa3_used);
551 vap->va_fileid = fxdr_unsigned(int32_t,
552 fp->fa3_fileid.nfsuquad[1]);
553 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
554 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
558 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
559 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
560 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
561 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
562 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
563 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
565 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
566 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
568 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
569 fp->fa2_ctime.nfsv2_sec);
570 vap->va_ctime.tv_nsec = 0;
571 vap->va_gen = fxdr_unsigned(u_int32_t, fp->fa2_ctime.nfsv2_usec);
574 np->n_attrstamp = time_second;
575 if (vap->va_size != np->n_size) {
576 if (vap->va_type == VREG) {
577 if (dontshrink && vap->va_size < np->n_size) {
579 * We've been told not to shrink the file;
580 * zero np->n_attrstamp to indicate that
581 * the attributes are stale.
583 vap->va_size = np->n_size;
585 } else if (np->n_flag & NMODIFIED) {
586 if (vap->va_size < np->n_size)
587 vap->va_size = np->n_size;
589 np->n_size = vap->va_size;
591 np->n_size = vap->va_size;
593 vnode_pager_setsize(vp, np->n_size);
595 np->n_size = vap->va_size;
599 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
600 if (np->n_flag & NCHG) {
601 if (np->n_flag & NACC)
602 vaper->va_atime = np->n_atim;
603 if (np->n_flag & NUPD)
604 vaper->va_mtime = np->n_mtim;
611 #include <sys/sysctl.h>
612 SYSCTL_DECL(_vfs_nfs);
613 static int nfs_acdebug;
614 SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
618 * Check the time stamp
619 * If the cache is valid, copy contents to *vap and return 0
620 * otherwise return an error
623 nfs_getattrcache(struct vnode *vp, struct vattr *vaper)
627 struct nfsmount *nmp;
632 nmp = VFSTONFS(vp->v_mount);
633 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
634 timeo = (time_second - np->n_mtime) / 10;
638 printf("nfs_getattrcache: initial timeo = %d\n", timeo);
641 if (vap->va_type == VDIR) {
642 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
643 timeo = nmp->nm_acdirmin;
644 else if (timeo > nmp->nm_acdirmax)
645 timeo = nmp->nm_acdirmax;
647 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
648 timeo = nmp->nm_acregmin;
649 else if (timeo > nmp->nm_acregmax)
650 timeo = nmp->nm_acregmax;
655 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
656 nmp->nm_acregmin, nmp->nm_acregmax,
657 nmp->nm_acdirmin, nmp->nm_acdirmax);
660 printf("nfs_getattrcache: age = %d; final timeo = %d\n",
661 (time_second - np->n_attrstamp), timeo);
664 if ((time_second - np->n_attrstamp) >= timeo) {
665 nfsstats.attrcache_misses++;
668 nfsstats.attrcache_hits++;
669 if (vap->va_size != np->n_size) {
670 if (vap->va_type == VREG) {
671 if (np->n_flag & NMODIFIED) {
672 if (vap->va_size < np->n_size)
673 vap->va_size = np->n_size;
675 np->n_size = vap->va_size;
677 np->n_size = vap->va_size;
679 vnode_pager_setsize(vp, np->n_size);
681 np->n_size = vap->va_size;
684 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
685 if (np->n_flag & NCHG) {
686 if (np->n_flag & NACC)
687 vaper->va_atime = np->n_atim;
688 if (np->n_flag & NUPD)
689 vaper->va_mtime = np->n_mtim;
694 static nfsuint64 nfs_nullcookie = { { 0, 0 } };
696 * This function finds the directory cookie that corresponds to the
697 * logical byte offset given.
700 nfs_getcookie(struct nfsnode *np, off_t off, int add)
702 struct nfsdmap *dp, *dp2;
705 pos = (uoff_t)off / NFS_DIRBLKSIZ;
706 if (pos == 0 || off < 0) {
709 panic("nfs getcookie add at <= 0");
711 return (&nfs_nullcookie);
714 dp = LIST_FIRST(&np->n_cookies);
717 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
718 M_NFSDIROFF, M_WAITOK);
719 dp->ndm_eocookie = 0;
720 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
724 while (pos >= NFSNUMCOOKIES) {
725 pos -= NFSNUMCOOKIES;
726 if (LIST_NEXT(dp, ndm_list)) {
727 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
728 pos >= dp->ndm_eocookie)
730 dp = LIST_NEXT(dp, ndm_list);
732 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
733 M_NFSDIROFF, M_WAITOK);
734 dp2->ndm_eocookie = 0;
735 LIST_INSERT_AFTER(dp, dp2, ndm_list);
740 if (pos >= dp->ndm_eocookie) {
742 dp->ndm_eocookie = pos + 1;
746 return (&dp->ndm_cookies[pos]);
750 * Invalidate cached directory information, except for the actual directory
751 * blocks (which are invalidated separately).
752 * Done mainly to avoid the use of stale offset cookies.
755 nfs_invaldir(struct vnode *vp)
757 struct nfsnode *np = VTONFS(vp);
760 if (vp->v_type != VDIR)
761 panic("nfs: invaldir not dir");
763 np->n_direofoffset = 0;
764 np->n_cookieverf.nfsuquad[0] = 0;
765 np->n_cookieverf.nfsuquad[1] = 0;
766 if (LIST_FIRST(&np->n_cookies))
767 LIST_FIRST(&np->n_cookies)->ndm_eocookie = 0;
771 * The write verifier has changed (probably due to a server reboot), so all
772 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
773 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
774 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the
777 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
778 * writes are not clusterable.
781 nfs_clearcommit(struct mount *mp)
783 struct vnode *vp, *nvp;
784 struct buf *bp, *nbp;
790 mtx_lock(&mntvnode_mtx);
792 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) {
793 if (vp->v_mount != mp) /* Paranoia */
795 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
797 mtx_unlock(&mntvnode_mtx);
798 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
799 nbp = TAILQ_NEXT(bp, b_vnbufs);
800 if (BUF_REFCNT(bp) == 0 &&
801 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
802 == (B_DELWRI | B_NEEDCOMMIT))
803 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
806 mtx_lock(&mntvnode_mtx);
808 mtx_unlock(&mntvnode_mtx);
813 * Helper functions for former macros. Some of these should be
814 * moved to their callers.
818 nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
819 struct mbuf **md, caddr_t *dpos)
821 struct nfsnode *ttnp;
829 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
832 *f = fxdr_unsigned(int, *tl);
836 t1 = nfsm_getfh_xx(&ttfhp, &ttfhsize, (v3), md, dpos);
839 t1 = nfs_nget(d->v_mount, ttfhp, ttfhsize, &ttnp);
845 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
849 *f = fxdr_unsigned(int, *tl);
850 else if (fxdr_unsigned(int, *tl))
851 nfsm_adv_xx(NFSX_V3FATTR, md, dpos);
855 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 0);
864 nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md, caddr_t *dpos)
869 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
872 *s = fxdr_unsigned(int, *tl);
873 if (*s <= 0 || *s > NFSX_V3FHMAX)
877 *f = nfsm_dissect_xx(nfsm_rndup(*s), md, dpos);
886 nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
891 struct vnode *ttvp = *v;
892 t1 = nfs_loadattrcache(&ttvp, md, dpos, va, 0);
900 nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
906 struct vnode *ttvp = *v;
907 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
910 *f = fxdr_unsigned(int, *tl);
912 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 1);
923 nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md, caddr_t *dpos)
926 int ttattrf, ttretf = 0;
929 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
932 if (*tl == nfs_true) {
933 tl = nfsm_dissect_xx(6 * NFSX_UNSIGNED, md, dpos);
937 ttretf = (VTONFS(*v)->n_mtime ==
938 fxdr_unsigned(u_int32_t, *(tl + 2)));
940 t1 = nfsm_postop_attr_xx(v, &ttattrf, md, dpos);
951 nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb, caddr_t *bpos)
958 t1 = nfsm_rndup(s) + NFSX_UNSIGNED;
959 if (t1 <= M_TRAILINGSPACE(*mb)) {
960 tl = nfsm_build_xx(t1, mb, bpos);
961 *tl++ = txdr_unsigned(s);
962 *(tl + ((t1 >> 2) - 2)) = 0;
965 t1 = nfsm_strtmbuf(mb, bpos, a, s);
973 nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb, caddr_t *bpos)
980 t1 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED;
981 if (t1 < M_TRAILINGSPACE(*mb)) {
982 tl = nfsm_build_xx(t1, mb, bpos);
983 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize);
984 *(tl + ((t1 >> 2) - 2)) = 0;
985 bcopy(VTONFS(v)->n_fhp, tl, VTONFS(v)->n_fhsize);
987 t1 = nfsm_strtmbuf(mb, bpos,
988 (const char *)VTONFS(v)->n_fhp,
989 VTONFS(v)->n_fhsize);
994 cp = nfsm_build_xx(NFSX_V2FH, mb, bpos);
995 bcopy(VTONFS(v)->n_fhp, cp, NFSX_V2FH);
1001 nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
1006 if (va->va_mode != (mode_t)VNOVAL) {
1007 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1009 *tl = txdr_unsigned(va->va_mode);
1011 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1014 if (full && va->va_uid != (uid_t)VNOVAL) {
1015 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1017 *tl = txdr_unsigned(va->va_uid);
1019 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1022 if (full && va->va_gid != (gid_t)VNOVAL) {
1023 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1025 *tl = txdr_unsigned(va->va_gid);
1027 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1030 if (full && va->va_size != VNOVAL) {
1031 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1033 txdr_hyper(va->va_size, tl);
1035 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1038 if (va->va_atime.tv_sec != VNOVAL) {
1039 if (va->va_atime.tv_sec != time_second) {
1040 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1041 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1042 txdr_nfsv3time(&va->va_atime, tl);
1044 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1045 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1048 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1049 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
1051 if (va->va_mtime.tv_sec != VNOVAL) {
1052 if (va->va_mtime.tv_sec != time_second) {
1053 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1054 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1055 txdr_nfsv3time(&va->va_mtime, tl);
1057 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1058 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1061 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1062 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);