2 * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND BSD-3-Clause)
4 * Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
7 * This software was developed for the FreeBSD Project by Marshall
8 * Kirk McKusick and Network Associates Laboratories, the Security
9 * Research Division of Network Associates, Inc. under DARPA/SPAWAR
10 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Copyright (c) 1982, 1986, 1989, 1993
35 * The Regents of the University of California. All rights reserved.
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38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
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51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * from: @(#)ufs_readwrite.c 8.11 (Berkeley) 5/8/95
62 * from: $FreeBSD: .../ufs/ufs_readwrite.c,v 1.96 2002/08/12 09:22:11 phk ...
63 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
66 #include <sys/cdefs.h>
67 __FBSDID("$FreeBSD$");
69 #include <sys/param.h>
71 #include <sys/systm.h>
74 #include <sys/extattr.h>
75 #include <sys/kernel.h>
76 #include <sys/limits.h>
77 #include <sys/malloc.h>
78 #include <sys/mount.h>
80 #include <sys/rwlock.h>
82 #include <sys/sysctl.h>
83 #include <sys/vmmeter.h>
84 #include <sys/vnode.h>
87 #include <vm/vm_param.h>
88 #include <vm/vm_extern.h>
89 #include <vm/vm_object.h>
90 #include <vm/vm_page.h>
91 #include <vm/vm_pager.h>
92 #include <vm/vnode_pager.h>
94 #include <ufs/ufs/extattr.h>
95 #include <ufs/ufs/quota.h>
96 #include <ufs/ufs/inode.h>
97 #include <ufs/ufs/ufs_extern.h>
98 #include <ufs/ufs/ufsmount.h>
100 #include <ufs/ffs/fs.h>
101 #include <ufs/ffs/ffs_extern.h>
102 #include "opt_directio.h"
105 #define ALIGNED_TO(ptr, s) \
106 (((uintptr_t)(ptr) & (_Alignof(s) - 1)) == 0)
109 extern int ffs_rawread(struct vnode *vp, struct uio *uio, int *workdone);
111 static vop_fdatasync_t ffs_fdatasync;
112 static vop_fsync_t ffs_fsync;
113 static vop_getpages_t ffs_getpages;
114 static vop_getpages_async_t ffs_getpages_async;
115 static vop_lock1_t ffs_lock;
117 static vop_unlock_t ffs_unlock_debug;
119 static vop_read_t ffs_read;
120 static vop_write_t ffs_write;
121 static int ffs_extread(struct vnode *vp, struct uio *uio, int ioflag);
122 static int ffs_extwrite(struct vnode *vp, struct uio *uio, int ioflag,
124 static vop_strategy_t ffsext_strategy;
125 static vop_closeextattr_t ffs_closeextattr;
126 static vop_deleteextattr_t ffs_deleteextattr;
127 static vop_getextattr_t ffs_getextattr;
128 static vop_listextattr_t ffs_listextattr;
129 static vop_openextattr_t ffs_openextattr;
130 static vop_setextattr_t ffs_setextattr;
131 static vop_vptofh_t ffs_vptofh;
133 /* Global vfs data structures for ufs. */
134 struct vop_vector ffs_vnodeops1 = {
135 .vop_default = &ufs_vnodeops,
136 .vop_fsync = ffs_fsync,
137 .vop_fdatasync = ffs_fdatasync,
138 .vop_getpages = ffs_getpages,
139 .vop_getpages_async = ffs_getpages_async,
140 .vop_lock1 = ffs_lock,
142 .vop_unlock = ffs_unlock_debug,
144 .vop_read = ffs_read,
145 .vop_reallocblks = ffs_reallocblks,
146 .vop_write = ffs_write,
147 .vop_vptofh = ffs_vptofh,
149 VFS_VOP_VECTOR_REGISTER(ffs_vnodeops1);
151 struct vop_vector ffs_fifoops1 = {
152 .vop_default = &ufs_fifoops,
153 .vop_fsync = ffs_fsync,
154 .vop_fdatasync = ffs_fdatasync,
155 .vop_lock1 = ffs_lock,
157 .vop_unlock = ffs_unlock_debug,
159 .vop_vptofh = ffs_vptofh,
161 VFS_VOP_VECTOR_REGISTER(ffs_fifoops1);
163 /* Global vfs data structures for ufs. */
164 struct vop_vector ffs_vnodeops2 = {
165 .vop_default = &ufs_vnodeops,
166 .vop_fsync = ffs_fsync,
167 .vop_fdatasync = ffs_fdatasync,
168 .vop_getpages = ffs_getpages,
169 .vop_getpages_async = ffs_getpages_async,
170 .vop_lock1 = ffs_lock,
172 .vop_unlock = ffs_unlock_debug,
174 .vop_read = ffs_read,
175 .vop_reallocblks = ffs_reallocblks,
176 .vop_write = ffs_write,
177 .vop_closeextattr = ffs_closeextattr,
178 .vop_deleteextattr = ffs_deleteextattr,
179 .vop_getextattr = ffs_getextattr,
180 .vop_listextattr = ffs_listextattr,
181 .vop_openextattr = ffs_openextattr,
182 .vop_setextattr = ffs_setextattr,
183 .vop_vptofh = ffs_vptofh,
185 VFS_VOP_VECTOR_REGISTER(ffs_vnodeops2);
187 struct vop_vector ffs_fifoops2 = {
188 .vop_default = &ufs_fifoops,
189 .vop_fsync = ffs_fsync,
190 .vop_fdatasync = ffs_fdatasync,
191 .vop_lock1 = ffs_lock,
193 .vop_unlock = ffs_unlock_debug,
195 .vop_reallocblks = ffs_reallocblks,
196 .vop_strategy = ffsext_strategy,
197 .vop_closeextattr = ffs_closeextattr,
198 .vop_deleteextattr = ffs_deleteextattr,
199 .vop_getextattr = ffs_getextattr,
200 .vop_listextattr = ffs_listextattr,
201 .vop_openextattr = ffs_openextattr,
202 .vop_setextattr = ffs_setextattr,
203 .vop_vptofh = ffs_vptofh,
205 VFS_VOP_VECTOR_REGISTER(ffs_fifoops2);
208 * Synch an open file.
212 ffs_fsync(struct vop_fsync_args *ap)
221 error = ffs_syncvnode(vp, ap->a_waitfor, 0);
224 if (ap->a_waitfor == MNT_WAIT && DOINGSOFTDEP(vp)) {
225 error = softdep_fsync(vp);
230 * The softdep_fsync() function may drop vp lock,
231 * allowing for dirty buffers to reappear on the
232 * bo_dirty list. Recheck and resync as needed.
235 if ((vp->v_type == VREG || vp->v_type == VDIR) &&
236 (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) {
242 if (ffs_fsfail_cleanup(VFSTOUFS(vp->v_mount), 0))
248 ffs_syncvnode(struct vnode *vp, int waitfor, int flags)
252 struct ufsmount *ump;
253 struct buf *bp, *nbp;
256 bool still_dirty, unlocked, wait;
259 ip->i_flag &= ~IN_NEEDSYNC;
261 ump = VFSTOUFS(vp->v_mount);
264 * When doing MNT_WAIT we must first flush all dependencies
267 if (DOINGSOFTDEP(vp) && waitfor == MNT_WAIT &&
268 (error = softdep_sync_metadata(vp)) != 0) {
269 if (ffs_fsfail_cleanup(ump, error))
275 * Flush all dirty buffers associated with a vnode.
279 wait = false; /* Always do an async pass first. */
281 lbn = lblkno(ITOFS(ip), (ip->i_size + ITOFS(ip)->fs_bsize - 1));
284 TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs)
285 bp->b_vflags &= ~BV_SCANNED;
286 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
288 * Reasons to skip this buffer: it has already been considered
289 * on this pass, the buffer has dependencies that will cause
290 * it to be redirtied and it has not already been deferred,
291 * or it is already being written.
293 if ((bp->b_vflags & BV_SCANNED) != 0)
295 bp->b_vflags |= BV_SCANNED;
297 * Flush indirects in order, if requested.
299 * Note that if only datasync is requested, we can
300 * skip indirect blocks when softupdates are not
301 * active. Otherwise we must flush them with data,
302 * since dependencies prevent data block writes.
304 if (waitfor == MNT_WAIT && bp->b_lblkno <= -UFS_NDADDR &&
305 (lbn_level(bp->b_lblkno) >= passes ||
306 ((flags & DATA_ONLY) != 0 && !DOINGSOFTDEP(vp))))
308 if (bp->b_lblkno > lbn)
309 panic("ffs_syncvnode: syncing truncated data.");
310 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL) == 0) {
314 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
315 BO_LOCKPTR(bo)) != 0) {
316 bp->b_vflags &= ~BV_SCANNED;
321 if ((bp->b_flags & B_DELWRI) == 0)
322 panic("ffs_fsync: not dirty");
324 * Check for dependencies and potentially complete them.
326 if (!LIST_EMPTY(&bp->b_dep) &&
327 (error = softdep_sync_buf(vp, bp,
328 wait ? MNT_WAIT : MNT_NOWAIT)) != 0) {
330 * Lock order conflict, buffer was already unlocked,
331 * and vnode possibly unlocked.
333 if (error == ERELOOKUP) {
334 if (vp->v_data == NULL)
337 if (DOINGSOFTDEP(vp) && waitfor == MNT_WAIT &&
338 (error = softdep_sync_metadata(vp)) != 0) {
339 if (ffs_fsfail_cleanup(ump, error))
341 return (unlocked && error == 0 ?
344 /* Re-evaluate inode size */
345 lbn = lblkno(ITOFS(ip), (ip->i_size +
346 ITOFS(ip)->fs_bsize - 1));
350 if (error != EBUSY) {
354 /* If we deferred once, don't defer again. */
355 if ((bp->b_flags & B_DEFERRED) == 0) {
356 bp->b_flags |= B_DEFERRED;
364 if (ffs_fsfail_cleanup(ump, error))
368 } else if ((bp->b_flags & B_CLUSTEROK)) {
369 (void) vfs_bio_awrite(bp);
376 * Since we may have slept during the I/O, we need
377 * to start from a known point.
380 nbp = TAILQ_FIRST(&bo->bo_dirty.bv_hd);
382 if (waitfor != MNT_WAIT) {
384 if ((flags & NO_INO_UPDT) != 0)
385 return (unlocked ? ERELOOKUP : 0);
386 error = ffs_update(vp, 0);
387 if (error == 0 && unlocked)
391 /* Drain IO to see if we're done. */
392 bufobj_wwait(bo, 0, 0);
394 * Block devices associated with filesystems may have new I/O
395 * requests posted for them even if the vnode is locked, so no
396 * amount of trying will get them clean. We make several passes
399 * Regular files may need multiple passes to flush all dependency
400 * work as it is possible that we must write once per indirect
401 * level, once for the leaf, and once for the inode and each of
402 * these will be done with one sync and one async pass.
404 if (bo->bo_dirty.bv_cnt > 0) {
405 if ((flags & DATA_ONLY) == 0) {
409 * For data-only sync, dirty indirect buffers
413 TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) {
414 if (bp->b_lblkno > -UFS_NDADDR) {
422 /* Write the inode after sync passes to flush deps. */
423 if (wait && DOINGSOFTDEP(vp) &&
424 (flags & NO_INO_UPDT) == 0) {
429 /* switch between sync/async. */
431 if (wait || ++passes < UFS_NIADDR + 2)
437 if ((flags & DATA_ONLY) == 0) {
438 if ((flags & NO_INO_UPDT) == 0)
439 error = ffs_update(vp, 1);
441 softdep_journal_fsync(VTOI(vp));
442 } else if ((ip->i_flags & (IN_SIZEMOD | IN_IBLKDATA)) != 0) {
443 error = ffs_update(vp, 1);
445 if (error == 0 && unlocked)
451 ffs_fdatasync(struct vop_fdatasync_args *ap)
454 return (ffs_syncvnode(ap->a_vp, MNT_WAIT, DATA_ONLY));
459 struct vop_lock1_args /* {
466 #if !defined(NO_FFS_SNAPSHOT) || defined(DIAGNOSTIC)
467 struct vnode *vp = ap->a_vp;
468 #endif /* !NO_FFS_SNAPSHOT || DIAGNOSTIC */
471 #endif /* DIAGNOSTIC */
473 #ifndef NO_FFS_SNAPSHOT
478 * Adaptive spinning mixed with SU leads to trouble. use a giant hammer
479 * and only use it when LK_NODDLKTREAT is set. Currently this means it
480 * is only used during path lookup.
482 if ((ap->a_flags & LK_NODDLKTREAT) != 0)
483 ap->a_flags |= LK_ADAPTIVE;
484 switch (ap->a_flags & LK_TYPE_MASK) {
490 #ifdef DEBUG_VFS_LOCKS
491 VNPASS(vp->v_holdcnt != 0, vp);
492 #endif /* DEBUG_VFS_LOCKS */
494 result = lockmgr_lock_flags(lkp, flags,
495 &VI_MTX(vp)->lock_object, ap->a_file, ap->a_line);
496 if (lkp == vp->v_vnlock || result != 0)
499 * Apparent success, except that the vnode
500 * mutated between snapshot file vnode and
501 * regular file vnode while this process
502 * slept. The lock currently held is not the
503 * right lock. Release it, and try to get the
507 if ((flags & (LK_INTERLOCK | LK_NOWAIT)) ==
508 (LK_INTERLOCK | LK_NOWAIT))
510 if ((flags & LK_TYPE_MASK) == LK_UPGRADE)
511 flags = (flags & ~LK_TYPE_MASK) | LK_EXCLUSIVE;
512 flags &= ~LK_INTERLOCK;
515 switch (ap->a_flags & LK_TYPE_MASK) {
518 if (result == 0 && vp->v_vnlock->lk_recurse == 0) {
524 #endif /* DIAGNOSTIC */
528 if ((ap->a_flags & LK_TYPE_MASK) == LK_DOWNGRADE) {
531 ufs_unlock_tracker(ip);
533 #endif /* DIAGNOSTIC */
534 result = VOP_LOCK1_APV(&ufs_vnodeops, ap);
537 #else /* NO_FFS_SNAPSHOT */
539 * See above for an explanation.
541 if ((ap->a_flags & LK_NODDLKTREAT) != 0)
542 ap->a_flags |= LK_ADAPTIVE;
544 if ((ap->a_flags & LK_TYPE_MASK) == LK_DOWNGRADE) {
547 ufs_unlock_tracker(ip);
549 #endif /* DIAGNOSTIC */
550 result = VOP_LOCK1_APV(&ufs_vnodeops, ap);
551 #endif /* NO_FFS_SNAPSHOT */
553 switch (ap->a_flags & LK_TYPE_MASK) {
556 if (result == 0 && vp->v_vnlock->lk_recurse == 0) {
562 #endif /* DIAGNOSTIC */
568 ffs_unlock_debug(struct vop_unlock_args *ap)
575 if (ip->i_flag & UFS_INODE_FLAG_LAZY_MASK_ASSERTABLE) {
576 if ((vp->v_mflag & VMP_LAZYLIST) == 0) {
578 VNASSERT((vp->v_mflag & VMP_LAZYLIST), vp,
579 ("%s: modified vnode (%x) not on lazy list",
580 __func__, ip->i_flag));
585 if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE && ip != NULL &&
586 vp->v_vnlock->lk_recurse == 0)
587 ufs_unlock_tracker(ip);
589 return (VOP_UNLOCK_APV(&ufs_vnodeops, ap));
594 ffs_read_hole(struct uio *uio, long xfersize, long *size)
596 ssize_t saved_resid, tlen;
599 while (xfersize > 0) {
600 tlen = min(xfersize, ZERO_REGION_SIZE);
601 saved_resid = uio->uio_resid;
602 error = vn_io_fault_uiomove(__DECONST(void *, zero_region),
606 tlen = saved_resid - uio->uio_resid;
614 * Vnode op for reading.
618 struct vop_read_args /* {
622 struct ucred *a_cred;
630 ufs_lbn_t lbn, nextlbn;
632 long size, xfersize, blkoffset;
634 int bflag, error, ioflag, seqcount;
638 ioflag = ap->a_ioflag;
639 if (ap->a_ioflag & IO_EXT)
641 return (ffs_extread(vp, uio, ioflag));
643 panic("ffs_read+IO_EXT");
646 if ((ioflag & IO_DIRECT) != 0) {
649 error = ffs_rawread(vp, uio, &workdone);
650 if (error != 0 || workdone != 0)
655 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
659 if (uio->uio_rw != UIO_READ)
660 panic("ffs_read: mode");
662 if (vp->v_type == VLNK) {
663 if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen)
664 panic("ffs_read: short symlink");
665 } else if (vp->v_type != VREG && vp->v_type != VDIR)
666 panic("ffs_read: type %d", vp->v_type);
668 orig_resid = uio->uio_resid;
669 KASSERT(orig_resid >= 0, ("ffs_read: uio->uio_resid < 0"));
672 KASSERT(uio->uio_offset >= 0, ("ffs_read: uio->uio_offset < 0"));
674 if (uio->uio_offset < ip->i_size &&
675 uio->uio_offset >= fs->fs_maxfilesize)
678 bflag = GB_UNMAPPED | (uio->uio_segflg == UIO_NOCOPY ? 0 : GB_NOSPARSE);
679 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
680 if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0)
682 lbn = lblkno(fs, uio->uio_offset);
686 * size of buffer. The buffer representing the
687 * end of the file is rounded up to the size of
688 * the block type ( fragment or full block,
691 size = blksize(fs, ip, lbn);
692 blkoffset = blkoff(fs, uio->uio_offset);
695 * The amount we want to transfer in this iteration is
696 * one FS block less the amount of the data before
697 * our startpoint (duh!)
699 xfersize = fs->fs_bsize - blkoffset;
702 * But if we actually want less than the block,
703 * or the file doesn't have a whole block more of data,
704 * then use the lesser number.
706 if (uio->uio_resid < xfersize)
707 xfersize = uio->uio_resid;
708 if (bytesinfile < xfersize)
709 xfersize = bytesinfile;
711 if (lblktosize(fs, nextlbn) >= ip->i_size) {
713 * Don't do readahead if this is the end of the file.
715 error = bread_gb(vp, lbn, size, NOCRED, bflag, &bp);
716 } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
718 * Otherwise if we are allowed to cluster,
719 * grab as much as we can.
721 * XXX This may not be a win if we are not
722 * doing sequential access.
724 error = cluster_read(vp, ip->i_size, lbn,
725 size, NOCRED, blkoffset + uio->uio_resid,
726 seqcount, bflag, &bp);
727 } else if (seqcount > 1) {
729 * If we are NOT allowed to cluster, then
730 * if we appear to be acting sequentially,
731 * fire off a request for a readahead
732 * as well as a read. Note that the 4th and 5th
733 * arguments point to arrays of the size specified in
736 u_int nextsize = blksize(fs, ip, nextlbn);
737 error = breadn_flags(vp, lbn, lbn, size, &nextlbn,
738 &nextsize, 1, NOCRED, bflag, NULL, &bp);
741 * Failing all of the above, just read what the
742 * user asked for. Interestingly, the same as
743 * the first option above.
745 error = bread_gb(vp, lbn, size, NOCRED, bflag, &bp);
747 if (error == EJUSTRETURN) {
748 error = ffs_read_hole(uio, xfersize, &size);
759 * We should only get non-zero b_resid when an I/O error
760 * has occurred, which should cause us to break above.
761 * However, if the short read did not cause an error,
762 * then we want to ensure that we do not uiomove bad
763 * or uninitialized data.
766 if (size < xfersize) {
772 if (buf_mapped(bp)) {
773 error = vn_io_fault_uiomove((char *)bp->b_data +
774 blkoffset, (int)xfersize, uio);
776 error = vn_io_fault_pgmove(bp->b_pages, blkoffset,
782 vfs_bio_brelse(bp, ioflag);
786 * This can only happen in the case of an error
787 * because the loop above resets bp to NULL on each iteration
788 * and on normal completion has not set a new value into it.
789 * so it must have come from a 'break' statement
792 vfs_bio_brelse(bp, ioflag);
794 if ((error == 0 || uio->uio_resid != orig_resid) &&
795 (vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0)
796 UFS_INODE_SET_FLAG_SHARED(ip, IN_ACCESS);
801 * Vnode op for writing.
805 struct vop_write_args /* {
809 struct ucred *a_cred;
821 int blkoffset, error, flags, ioflag, size, xfersize;
825 ioflag = ap->a_ioflag;
826 if (ap->a_ioflag & IO_EXT)
828 return (ffs_extwrite(vp, uio, ioflag, ap->a_cred));
830 panic("ffs_write+IO_EXT");
833 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
837 if (uio->uio_rw != UIO_WRITE)
838 panic("ffs_write: mode");
841 switch (vp->v_type) {
843 if (ioflag & IO_APPEND)
844 uio->uio_offset = ip->i_size;
845 if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size)
851 panic("ffs_write: dir write");
854 panic("ffs_write: type %p %d (%d,%d)", vp, (int)vp->v_type,
855 (int)uio->uio_offset,
860 KASSERT(uio->uio_resid >= 0, ("ffs_write: uio->uio_resid < 0"));
861 KASSERT(uio->uio_offset >= 0, ("ffs_write: uio->uio_offset < 0"));
863 if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->fs_maxfilesize)
866 * Maybe this should be above the vnode op call, but so long as
867 * file servers have no limits, I don't think it matters.
869 if (vn_rlimit_fsize(vp, uio, uio->uio_td))
872 resid = uio->uio_resid;
874 if (seqcount > BA_SEQMAX)
875 flags = BA_SEQMAX << BA_SEQSHIFT;
877 flags = seqcount << BA_SEQSHIFT;
878 if (ioflag & IO_SYNC)
880 flags |= BA_UNMAPPED;
882 for (error = 0; uio->uio_resid > 0;) {
883 lbn = lblkno(fs, uio->uio_offset);
884 blkoffset = blkoff(fs, uio->uio_offset);
885 xfersize = fs->fs_bsize - blkoffset;
886 if (uio->uio_resid < xfersize)
887 xfersize = uio->uio_resid;
888 if (uio->uio_offset + xfersize > ip->i_size)
889 vnode_pager_setsize(vp, uio->uio_offset + xfersize);
892 * We must perform a read-before-write if the transfer size
893 * does not cover the entire buffer.
895 if (fs->fs_bsize > xfersize)
899 /* XXX is uio->uio_offset the right thing here? */
900 error = UFS_BALLOC(vp, uio->uio_offset, xfersize,
901 ap->a_cred, flags, &bp);
903 vnode_pager_setsize(vp, ip->i_size);
906 if ((ioflag & (IO_SYNC|IO_INVAL)) == (IO_SYNC|IO_INVAL))
907 bp->b_flags |= B_NOCACHE;
909 if (uio->uio_offset + xfersize > ip->i_size) {
910 ip->i_size = uio->uio_offset + xfersize;
911 DIP_SET(ip, i_size, ip->i_size);
912 UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE);
915 size = blksize(fs, ip, lbn) - bp->b_resid;
919 if (buf_mapped(bp)) {
920 error = vn_io_fault_uiomove((char *)bp->b_data +
921 blkoffset, (int)xfersize, uio);
923 error = vn_io_fault_pgmove(bp->b_pages, blkoffset,
927 * If the buffer is not already filled and we encounter an
928 * error while trying to fill it, we have to clear out any
929 * garbage data from the pages instantiated for the buffer.
930 * If we do not, a failed uiomove() during a write can leave
931 * the prior contents of the pages exposed to a userland mmap.
933 * Note that we need only clear buffers with a transfer size
934 * equal to the block size because buffers with a shorter
935 * transfer size were cleared above by the call to UFS_BALLOC()
936 * with the BA_CLRBUF flag set.
938 * If the source region for uiomove identically mmaps the
939 * buffer, uiomove() performed the NOP copy, and the buffer
940 * content remains valid because the page fault handler
941 * validated the pages.
943 if (error != 0 && (bp->b_flags & B_CACHE) == 0 &&
944 fs->fs_bsize == xfersize)
947 vfs_bio_set_flags(bp, ioflag);
950 * If IO_SYNC each buffer is written synchronously. Otherwise
951 * if we have a severe page deficiency write the buffer
952 * asynchronously. Otherwise try to cluster, and if that
953 * doesn't do it then either do an async write (if O_DIRECT),
954 * or a delayed write (if not).
956 if (ioflag & IO_SYNC) {
958 } else if (vm_page_count_severe() ||
959 buf_dirty_count_severe() ||
960 (ioflag & IO_ASYNC)) {
961 bp->b_flags |= B_CLUSTEROK;
963 } else if (xfersize + blkoffset == fs->fs_bsize) {
964 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
965 bp->b_flags |= B_CLUSTEROK;
966 cluster_write(vp, bp, ip->i_size, seqcount,
971 } else if (ioflag & IO_DIRECT) {
972 bp->b_flags |= B_CLUSTEROK;
975 bp->b_flags |= B_CLUSTEROK;
978 if (error || xfersize == 0)
980 UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
983 * If we successfully wrote any data, and we are not the superuser
984 * we clear the setuid and setgid bits as a precaution against
987 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid &&
989 if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID)) {
990 vn_seqc_write_begin(vp);
991 UFS_INODE_SET_MODE(ip, ip->i_mode & ~(ISUID | ISGID));
992 DIP_SET(ip, i_mode, ip->i_mode);
993 vn_seqc_write_end(vp);
997 if (ioflag & IO_UNIT) {
998 (void)ffs_truncate(vp, osize,
999 IO_NORMAL | (ioflag & IO_SYNC), ap->a_cred);
1000 uio->uio_offset -= resid - uio->uio_resid;
1001 uio->uio_resid = resid;
1003 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) {
1004 error = ffs_update(vp, 1);
1005 if (ffs_fsfail_cleanup(VFSTOUFS(vp->v_mount), error))
1012 * Extended attribute area reading.
1015 ffs_extread(struct vnode *vp, struct uio *uio, int ioflag)
1018 struct ufs2_dinode *dp;
1021 ufs_lbn_t lbn, nextlbn;
1023 long size, xfersize, blkoffset;
1032 if (uio->uio_rw != UIO_READ || fs->fs_magic != FS_UFS2_MAGIC)
1033 panic("ffs_extread: mode");
1036 orig_resid = uio->uio_resid;
1037 KASSERT(orig_resid >= 0, ("ffs_extread: uio->uio_resid < 0"));
1038 if (orig_resid == 0)
1040 KASSERT(uio->uio_offset >= 0, ("ffs_extread: uio->uio_offset < 0"));
1042 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
1043 if ((bytesinfile = dp->di_extsize - uio->uio_offset) <= 0)
1045 lbn = lblkno(fs, uio->uio_offset);
1049 * size of buffer. The buffer representing the
1050 * end of the file is rounded up to the size of
1051 * the block type ( fragment or full block,
1054 size = sblksize(fs, dp->di_extsize, lbn);
1055 blkoffset = blkoff(fs, uio->uio_offset);
1058 * The amount we want to transfer in this iteration is
1059 * one FS block less the amount of the data before
1060 * our startpoint (duh!)
1062 xfersize = fs->fs_bsize - blkoffset;
1065 * But if we actually want less than the block,
1066 * or the file doesn't have a whole block more of data,
1067 * then use the lesser number.
1069 if (uio->uio_resid < xfersize)
1070 xfersize = uio->uio_resid;
1071 if (bytesinfile < xfersize)
1072 xfersize = bytesinfile;
1074 if (lblktosize(fs, nextlbn) >= dp->di_extsize) {
1076 * Don't do readahead if this is the end of the info.
1078 error = bread(vp, -1 - lbn, size, NOCRED, &bp);
1081 * If we have a second block, then
1082 * fire off a request for a readahead
1083 * as well as a read. Note that the 4th and 5th
1084 * arguments point to arrays of the size specified in
1087 u_int nextsize = sblksize(fs, dp->di_extsize, nextlbn);
1089 nextlbn = -1 - nextlbn;
1090 error = breadn(vp, -1 - lbn,
1091 size, &nextlbn, &nextsize, 1, NOCRED, &bp);
1100 * We should only get non-zero b_resid when an I/O error
1101 * has occurred, which should cause us to break above.
1102 * However, if the short read did not cause an error,
1103 * then we want to ensure that we do not uiomove bad
1104 * or uninitialized data.
1106 size -= bp->b_resid;
1107 if (size < xfersize) {
1113 error = uiomove((char *)bp->b_data + blkoffset,
1114 (int)xfersize, uio);
1117 vfs_bio_brelse(bp, ioflag);
1121 * This can only happen in the case of an error
1122 * because the loop above resets bp to NULL on each iteration
1123 * and on normal completion has not set a new value into it.
1124 * so it must have come from a 'break' statement
1127 vfs_bio_brelse(bp, ioflag);
1132 * Extended attribute area writing.
1135 ffs_extwrite(struct vnode *vp, struct uio *uio, int ioflag, struct ucred *ucred)
1138 struct ufs2_dinode *dp;
1144 int blkoffset, error, flags, size, xfersize;
1151 if (uio->uio_rw != UIO_WRITE || fs->fs_magic != FS_UFS2_MAGIC)
1152 panic("ffs_extwrite: mode");
1155 if (ioflag & IO_APPEND)
1156 uio->uio_offset = dp->di_extsize;
1157 KASSERT(uio->uio_offset >= 0, ("ffs_extwrite: uio->uio_offset < 0"));
1158 KASSERT(uio->uio_resid >= 0, ("ffs_extwrite: uio->uio_resid < 0"));
1159 if ((uoff_t)uio->uio_offset + uio->uio_resid >
1160 UFS_NXADDR * fs->fs_bsize)
1163 resid = uio->uio_resid;
1164 osize = dp->di_extsize;
1166 if (ioflag & IO_SYNC)
1169 for (error = 0; uio->uio_resid > 0;) {
1170 lbn = lblkno(fs, uio->uio_offset);
1171 blkoffset = blkoff(fs, uio->uio_offset);
1172 xfersize = fs->fs_bsize - blkoffset;
1173 if (uio->uio_resid < xfersize)
1174 xfersize = uio->uio_resid;
1177 * We must perform a read-before-write if the transfer size
1178 * does not cover the entire buffer.
1180 if (fs->fs_bsize > xfersize)
1183 flags &= ~BA_CLRBUF;
1184 error = UFS_BALLOC(vp, uio->uio_offset, xfersize,
1189 * If the buffer is not valid we have to clear out any
1190 * garbage data from the pages instantiated for the buffer.
1191 * If we do not, a failed uiomove() during a write can leave
1192 * the prior contents of the pages exposed to a userland
1193 * mmap(). XXX deal with uiomove() errors a better way.
1195 if ((bp->b_flags & B_CACHE) == 0 && fs->fs_bsize <= xfersize)
1198 if (uio->uio_offset + xfersize > dp->di_extsize) {
1199 dp->di_extsize = uio->uio_offset + xfersize;
1200 UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE);
1203 size = sblksize(fs, dp->di_extsize, lbn) - bp->b_resid;
1204 if (size < xfersize)
1208 uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio);
1210 vfs_bio_set_flags(bp, ioflag);
1213 * If IO_SYNC each buffer is written synchronously. Otherwise
1214 * if we have a severe page deficiency write the buffer
1215 * asynchronously. Otherwise try to cluster, and if that
1216 * doesn't do it then either do an async write (if O_DIRECT),
1217 * or a delayed write (if not).
1219 if (ioflag & IO_SYNC) {
1221 } else if (vm_page_count_severe() ||
1222 buf_dirty_count_severe() ||
1223 xfersize + blkoffset == fs->fs_bsize ||
1224 (ioflag & (IO_ASYNC | IO_DIRECT)))
1228 if (error || xfersize == 0)
1230 UFS_INODE_SET_FLAG(ip, IN_CHANGE);
1233 * If we successfully wrote any data, and we are not the superuser
1234 * we clear the setuid and setgid bits as a precaution against
1237 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && ucred) {
1238 if (priv_check_cred(ucred, PRIV_VFS_RETAINSUGID)) {
1239 vn_seqc_write_begin(vp);
1240 UFS_INODE_SET_MODE(ip, ip->i_mode & ~(ISUID | ISGID));
1241 dp->di_mode = ip->i_mode;
1242 vn_seqc_write_end(vp);
1246 if (ioflag & IO_UNIT) {
1247 (void)ffs_truncate(vp, osize,
1248 IO_EXT | (ioflag&IO_SYNC), ucred);
1249 uio->uio_offset -= resid - uio->uio_resid;
1250 uio->uio_resid = resid;
1252 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC))
1253 error = ffs_update(vp, 1);
1258 * Vnode operating to retrieve a named extended attribute.
1260 * Locate a particular EA (nspace:name) in the area (ptr:length), and return
1261 * the length of the EA, and possibly the pointer to the entry and to the data.
1264 ffs_findextattr(u_char *ptr, u_int length, int nspace, const char *name,
1265 struct extattr **eapp, u_char **eac)
1267 struct extattr *eap, *eaend;
1270 nlen = strlen(name);
1271 KASSERT(ALIGNED_TO(ptr, struct extattr), ("unaligned"));
1272 eap = (struct extattr *)ptr;
1273 eaend = (struct extattr *)(ptr + length);
1274 for (; eap < eaend; eap = EXTATTR_NEXT(eap)) {
1275 KASSERT(EXTATTR_NEXT(eap) <= eaend,
1276 ("extattr next %p beyond %p", EXTATTR_NEXT(eap), eaend));
1277 if (eap->ea_namespace != nspace || eap->ea_namelength != nlen
1278 || memcmp(eap->ea_name, name, nlen) != 0)
1283 *eac = EXTATTR_CONTENT(eap);
1284 return (EXTATTR_CONTENT_SIZE(eap));
1290 ffs_rdextattr(u_char **p, struct vnode *vp, struct thread *td)
1292 const struct extattr *eap, *eaend, *eapnext;
1294 struct ufs2_dinode *dp;
1297 struct iovec liovec;
1305 easize = dp->di_extsize;
1306 if ((uoff_t)easize > UFS_NXADDR * fs->fs_bsize)
1309 eae = malloc(easize, M_TEMP, M_WAITOK);
1311 liovec.iov_base = eae;
1312 liovec.iov_len = easize;
1313 luio.uio_iov = &liovec;
1314 luio.uio_iovcnt = 1;
1315 luio.uio_offset = 0;
1316 luio.uio_resid = easize;
1317 luio.uio_segflg = UIO_SYSSPACE;
1318 luio.uio_rw = UIO_READ;
1321 error = ffs_extread(vp, &luio, IO_EXT | IO_SYNC);
1326 /* Validate disk xattrfile contents. */
1327 for (eap = (void *)eae, eaend = (void *)(eae + easize); eap < eaend;
1329 eapnext = EXTATTR_NEXT(eap);
1330 /* Bogusly short entry or bogusly long entry. */
1331 if (eap->ea_length < sizeof(*eap) || eapnext > eaend) {
1333 return (EINTEGRITY);
1341 ffs_lock_ea(struct vnode *vp)
1347 while (ip->i_flag & IN_EA_LOCKED) {
1348 UFS_INODE_SET_FLAG(ip, IN_EA_LOCKWAIT);
1349 msleep(&ip->i_ea_refs, &vp->v_interlock, PINOD + 2, "ufs_ea",
1352 UFS_INODE_SET_FLAG(ip, IN_EA_LOCKED);
1357 ffs_unlock_ea(struct vnode *vp)
1363 if (ip->i_flag & IN_EA_LOCKWAIT)
1364 wakeup(&ip->i_ea_refs);
1365 ip->i_flag &= ~(IN_EA_LOCKED | IN_EA_LOCKWAIT);
1370 ffs_open_ea(struct vnode *vp, struct ucred *cred, struct thread *td)
1373 struct ufs2_dinode *dp;
1379 if (ip->i_ea_area != NULL) {
1385 error = ffs_rdextattr(&ip->i_ea_area, vp, td);
1390 ip->i_ea_len = dp->di_extsize;
1398 * Vnode extattr transaction commit/abort
1401 ffs_close_ea(struct vnode *vp, int commit, struct ucred *cred, struct thread *td)
1405 struct iovec liovec;
1407 struct ufs2_dinode *dp;
1412 if (ip->i_ea_area == NULL) {
1417 error = ip->i_ea_error;
1418 if (commit && error == 0) {
1419 ASSERT_VOP_ELOCKED(vp, "ffs_close_ea commit");
1421 cred = vp->v_mount->mnt_cred;
1422 liovec.iov_base = ip->i_ea_area;
1423 liovec.iov_len = ip->i_ea_len;
1424 luio.uio_iov = &liovec;
1425 luio.uio_iovcnt = 1;
1426 luio.uio_offset = 0;
1427 luio.uio_resid = ip->i_ea_len;
1428 luio.uio_segflg = UIO_SYSSPACE;
1429 luio.uio_rw = UIO_WRITE;
1431 /* XXX: I'm not happy about truncating to zero size */
1432 if (ip->i_ea_len < dp->di_extsize)
1433 error = ffs_truncate(vp, 0, IO_EXT, cred);
1434 error = ffs_extwrite(vp, &luio, IO_EXT | IO_SYNC, cred);
1436 if (--ip->i_ea_refs == 0) {
1437 free(ip->i_ea_area, M_TEMP);
1438 ip->i_ea_area = NULL;
1447 * Vnode extattr strategy routine for fifos.
1449 * We need to check for a read or write of the external attributes.
1450 * Otherwise we just fall through and do the usual thing.
1453 ffsext_strategy(struct vop_strategy_args *ap)
1455 struct vop_strategy_args {
1456 struct vnodeop_desc *a_desc;
1466 lbn = ap->a_bp->b_lblkno;
1467 if (I_IS_UFS2(VTOI(vp)) && lbn < 0 && lbn >= -UFS_NXADDR)
1468 return (VOP_STRATEGY_APV(&ufs_vnodeops, ap));
1469 if (vp->v_type == VFIFO)
1470 return (VOP_STRATEGY_APV(&ufs_fifoops, ap));
1471 panic("spec nodes went here");
1475 * Vnode extattr transaction commit/abort
1478 ffs_openextattr(struct vop_openextattr_args *ap)
1480 struct vop_openextattr_args {
1481 struct vnodeop_desc *a_desc;
1483 IN struct ucred *a_cred;
1484 IN struct thread *a_td;
1489 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1490 return (EOPNOTSUPP);
1492 return (ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td));
1496 * Vnode extattr transaction commit/abort
1499 ffs_closeextattr(struct vop_closeextattr_args *ap)
1501 struct vop_closeextattr_args {
1502 struct vnodeop_desc *a_desc;
1505 IN struct ucred *a_cred;
1506 IN struct thread *a_td;
1511 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1512 return (EOPNOTSUPP);
1514 if (ap->a_commit && (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY))
1517 return (ffs_close_ea(ap->a_vp, ap->a_commit, ap->a_cred, ap->a_td));
1521 * Vnode operation to remove a named attribute.
1524 ffs_deleteextattr(struct vop_deleteextattr_args *ap)
1527 IN struct vnode *a_vp;
1528 IN int a_attrnamespace;
1529 IN const char *a_name;
1530 IN struct ucred *a_cred;
1531 IN struct thread *a_td;
1536 struct extattr *eap;
1538 int olen, error, i, easize;
1542 ip = VTOI(ap->a_vp);
1544 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1545 return (EOPNOTSUPP);
1547 if (strlen(ap->a_name) == 0)
1550 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1553 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1554 ap->a_cred, ap->a_td, VWRITE);
1557 * ffs_lock_ea is not needed there, because the vnode
1558 * must be exclusively locked.
1560 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1561 ip->i_ea_error = error;
1565 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1569 /* CEM: delete could be done in-place instead */
1570 eae = malloc(ip->i_ea_len, M_TEMP, M_WAITOK);
1571 bcopy(ip->i_ea_area, eae, ip->i_ea_len);
1572 easize = ip->i_ea_len;
1574 olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1577 /* delete but nonexistent */
1579 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1582 ul = eap->ea_length;
1583 i = (u_char *)EXTATTR_NEXT(eap) - eae;
1584 bcopy(EXTATTR_NEXT(eap), eap, easize - i);
1587 tmp = ip->i_ea_area;
1588 ip->i_ea_area = eae;
1589 ip->i_ea_len = easize;
1591 error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td);
1596 * Vnode operation to retrieve a named extended attribute.
1599 ffs_getextattr(struct vop_getextattr_args *ap)
1602 IN struct vnode *a_vp;
1603 IN int a_attrnamespace;
1604 IN const char *a_name;
1605 INOUT struct uio *a_uio;
1607 IN struct ucred *a_cred;
1608 IN struct thread *a_td;
1617 ip = VTOI(ap->a_vp);
1619 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1620 return (EOPNOTSUPP);
1622 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1623 ap->a_cred, ap->a_td, VREAD);
1627 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1631 eae = ip->i_ea_area;
1632 easize = ip->i_ea_len;
1634 ealen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1638 if (ap->a_size != NULL)
1639 *ap->a_size = ealen;
1640 else if (ap->a_uio != NULL)
1641 error = uiomove(p, ealen, ap->a_uio);
1645 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1650 * Vnode operation to retrieve extended attributes on a vnode.
1653 ffs_listextattr(struct vop_listextattr_args *ap)
1656 IN struct vnode *a_vp;
1657 IN int a_attrnamespace;
1658 INOUT struct uio *a_uio;
1660 IN struct ucred *a_cred;
1661 IN struct thread *a_td;
1666 struct extattr *eap, *eaend;
1669 ip = VTOI(ap->a_vp);
1671 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1672 return (EOPNOTSUPP);
1674 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1675 ap->a_cred, ap->a_td, VREAD);
1679 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1684 if (ap->a_size != NULL)
1687 KASSERT(ALIGNED_TO(ip->i_ea_area, struct extattr), ("unaligned"));
1688 eap = (struct extattr *)ip->i_ea_area;
1689 eaend = (struct extattr *)(ip->i_ea_area + ip->i_ea_len);
1690 for (; error == 0 && eap < eaend; eap = EXTATTR_NEXT(eap)) {
1691 KASSERT(EXTATTR_NEXT(eap) <= eaend,
1692 ("extattr next %p beyond %p", EXTATTR_NEXT(eap), eaend));
1693 if (eap->ea_namespace != ap->a_attrnamespace)
1696 ealen = eap->ea_namelength;
1697 if (ap->a_size != NULL)
1698 *ap->a_size += ealen + 1;
1699 else if (ap->a_uio != NULL)
1700 error = uiomove(&eap->ea_namelength, ealen + 1,
1704 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1709 * Vnode operation to set a named attribute.
1712 ffs_setextattr(struct vop_setextattr_args *ap)
1715 IN struct vnode *a_vp;
1716 IN int a_attrnamespace;
1717 IN const char *a_name;
1718 INOUT struct uio *a_uio;
1719 IN struct ucred *a_cred;
1720 IN struct thread *a_td;
1726 struct extattr *eap;
1727 uint32_t ealength, ul;
1729 int olen, eapad1, eapad2, error, i, easize;
1733 ip = VTOI(ap->a_vp);
1736 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1737 return (EOPNOTSUPP);
1739 if (strlen(ap->a_name) == 0)
1742 /* XXX Now unsupported API to delete EAs using NULL uio. */
1743 if (ap->a_uio == NULL)
1744 return (EOPNOTSUPP);
1746 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1749 ealen = ap->a_uio->uio_resid;
1750 if (ealen < 0 || ealen > lblktosize(fs, UFS_NXADDR))
1753 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1754 ap->a_cred, ap->a_td, VWRITE);
1757 * ffs_lock_ea is not needed there, because the vnode
1758 * must be exclusively locked.
1760 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1761 ip->i_ea_error = error;
1765 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1769 ealength = sizeof(uint32_t) + 3 + strlen(ap->a_name);
1770 eapad1 = roundup2(ealength, 8) - ealength;
1771 eapad2 = roundup2(ealen, 8) - ealen;
1772 ealength += eapad1 + ealen + eapad2;
1775 * CEM: rewrites of the same size or smaller could be done in-place
1776 * instead. (We don't acquire any fine-grained locks in here either,
1777 * so we could also do bigger writes in-place.)
1779 eae = malloc(ip->i_ea_len + ealength, M_TEMP, M_WAITOK);
1780 bcopy(ip->i_ea_area, eae, ip->i_ea_len);
1781 easize = ip->i_ea_len;
1783 olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1786 /* new, append at end */
1787 KASSERT(ALIGNED_TO(eae + easize, struct extattr),
1789 eap = (struct extattr *)(eae + easize);
1792 ul = eap->ea_length;
1793 i = (u_char *)EXTATTR_NEXT(eap) - eae;
1794 if (ul != ealength) {
1795 bcopy(EXTATTR_NEXT(eap), (u_char *)eap + ealength,
1797 easize += (ealength - ul);
1800 if (easize > lblktosize(fs, UFS_NXADDR)) {
1802 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1803 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1804 ip->i_ea_error = ENOSPC;
1807 eap->ea_length = ealength;
1808 eap->ea_namespace = ap->a_attrnamespace;
1809 eap->ea_contentpadlen = eapad2;
1810 eap->ea_namelength = strlen(ap->a_name);
1811 memcpy(eap->ea_name, ap->a_name, strlen(ap->a_name));
1812 bzero(&eap->ea_name[strlen(ap->a_name)], eapad1);
1813 error = uiomove(EXTATTR_CONTENT(eap), ealen, ap->a_uio);
1816 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1817 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1818 ip->i_ea_error = error;
1821 bzero((u_char *)EXTATTR_CONTENT(eap) + ealen, eapad2);
1823 tmp = ip->i_ea_area;
1824 ip->i_ea_area = eae;
1825 ip->i_ea_len = easize;
1827 error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td);
1832 * Vnode pointer to File handle
1835 ffs_vptofh(struct vop_vptofh_args *ap)
1838 IN struct vnode *a_vp;
1839 IN struct fid *a_fhp;
1846 ip = VTOI(ap->a_vp);
1847 ufhp = (struct ufid *)ap->a_fhp;
1848 ufhp->ufid_len = sizeof(struct ufid);
1849 ufhp->ufid_ino = ip->i_number;
1850 ufhp->ufid_gen = ip->i_gen;
1854 SYSCTL_DECL(_vfs_ffs);
1855 static int use_buf_pager = 1;
1856 SYSCTL_INT(_vfs_ffs, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, &use_buf_pager, 0,
1857 "Always use buffer pager instead of bmap");
1860 ffs_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
1863 return (lblkno(VFSTOUFS(vp->v_mount)->um_fs, off));
1867 ffs_gbp_getblksz(struct vnode *vp, daddr_t lbn)
1870 return (blksize(VFSTOUFS(vp->v_mount)->um_fs, VTOI(vp), lbn));
1874 ffs_getpages(struct vop_getpages_args *ap)
1877 struct ufsmount *um;
1880 um = VFSTOUFS(vp->v_mount);
1882 if (!use_buf_pager && um->um_devvp->v_bufobj.bo_bsize <= PAGE_SIZE)
1883 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
1884 ap->a_rbehind, ap->a_rahead, NULL, NULL));
1885 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
1886 ap->a_rahead, ffs_gbp_getblkno, ffs_gbp_getblksz));
1890 ffs_getpages_async(struct vop_getpages_async_args *ap)
1893 struct ufsmount *um;
1898 um = VFSTOUFS(vp->v_mount);
1901 if (um->um_devvp->v_bufobj.bo_bsize <= PAGE_SIZE) {
1902 error = vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
1903 ap->a_rbehind, ap->a_rahead, ap->a_iodone, ap->a_arg);
1907 error = vfs_bio_getpages(vp, ap->a_m, ap->a_count,
1908 ap->a_rbehind, ap->a_rahead, ffs_gbp_getblkno,
1911 if (do_iodone && ap->a_iodone != NULL)
1912 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error);