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
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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.
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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34 * Copyright (c) 1982, 1986, 1989, 1993
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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, 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. */
280 lbn = lblkno(ITOFS(ip), (ip->i_size + ITOFS(ip)->fs_bsize - 1));
283 TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs)
284 bp->b_vflags &= ~BV_SCANNED;
285 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
287 * Reasons to skip this buffer: it has already been considered
288 * on this pass, the buffer has dependencies that will cause
289 * it to be redirtied and it has not already been deferred,
290 * or it is already being written.
292 if ((bp->b_vflags & BV_SCANNED) != 0)
294 bp->b_vflags |= BV_SCANNED;
296 * Flush indirects in order, if requested.
298 * Note that if only datasync is requested, we can
299 * skip indirect blocks when softupdates are not
300 * active. Otherwise we must flush them with data,
301 * since dependencies prevent data block writes.
303 if (waitfor == MNT_WAIT && bp->b_lblkno <= -UFS_NDADDR &&
304 (lbn_level(bp->b_lblkno) >= passes ||
305 ((flags & DATA_ONLY) != 0 && !DOINGSOFTDEP(vp))))
307 if (bp->b_lblkno > lbn)
308 panic("ffs_syncvnode: syncing truncated data.");
309 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL) == 0) {
313 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
314 BO_LOCKPTR(bo)) != 0) {
315 bp->b_vflags &= ~BV_SCANNED;
320 if ((bp->b_flags & B_DELWRI) == 0)
321 panic("ffs_fsync: not dirty");
323 * Check for dependencies and potentially complete them.
325 if (!LIST_EMPTY(&bp->b_dep) &&
326 (error = softdep_sync_buf(vp, bp,
327 wait ? MNT_WAIT : MNT_NOWAIT)) != 0) {
329 if (error != EBUSY) {
333 /* If we deferred once, don't defer again. */
334 if ((bp->b_flags & B_DEFERRED) == 0) {
335 bp->b_flags |= B_DEFERRED;
343 if (ffs_fsfail_cleanup(ump, error))
347 } else if ((bp->b_flags & B_CLUSTEROK)) {
348 (void) vfs_bio_awrite(bp);
355 * Since we may have slept during the I/O, we need
356 * to start from a known point.
359 nbp = TAILQ_FIRST(&bo->bo_dirty.bv_hd);
361 if (waitfor != MNT_WAIT) {
363 if ((flags & NO_INO_UPDT) != 0)
366 return (ffs_update(vp, 0));
368 /* Drain IO to see if we're done. */
369 bufobj_wwait(bo, 0, 0);
371 * Block devices associated with filesystems may have new I/O
372 * requests posted for them even if the vnode is locked, so no
373 * amount of trying will get them clean. We make several passes
376 * Regular files may need multiple passes to flush all dependency
377 * work as it is possible that we must write once per indirect
378 * level, once for the leaf, and once for the inode and each of
379 * these will be done with one sync and one async pass.
381 if (bo->bo_dirty.bv_cnt > 0) {
382 if ((flags & DATA_ONLY) == 0) {
386 * For data-only sync, dirty indirect buffers
390 TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) {
391 if (bp->b_lblkno > -UFS_NDADDR) {
399 /* Write the inode after sync passes to flush deps. */
400 if (wait && DOINGSOFTDEP(vp) &&
401 (flags & NO_INO_UPDT) == 0) {
406 /* switch between sync/async. */
408 if (wait || ++passes < UFS_NIADDR + 2)
414 if ((flags & DATA_ONLY) == 0) {
415 if ((flags & NO_INO_UPDT) == 0)
416 error = ffs_update(vp, 1);
418 softdep_journal_fsync(VTOI(vp));
419 } else if ((ip->i_flags & (IN_SIZEMOD | IN_IBLKDATA)) != 0) {
420 error = ffs_update(vp, 1);
426 ffs_fdatasync(struct vop_fdatasync_args *ap)
429 return (ffs_syncvnode(ap->a_vp, MNT_WAIT, DATA_ONLY));
434 struct vop_lock1_args /* {
442 #ifndef NO_FFS_SNAPSHOT
449 * Adaptive spinning mixed with SU leads to trouble. use a giant hammer
450 * and only use it when LK_NODDLKTREAT is set. Currently this means it
451 * is only used during path lookup.
453 if ((ap->a_flags & LK_NODDLKTREAT) != 0)
454 ap->a_flags |= LK_ADAPTIVE;
455 switch (ap->a_flags & LK_TYPE_MASK) {
462 #ifdef DEBUG_VFS_LOCKS
463 VNPASS(vp->v_holdcnt != 0, vp);
466 result = lockmgr_lock_flags(lkp, flags,
467 &VI_MTX(vp)->lock_object, ap->a_file, ap->a_line);
468 if (lkp == vp->v_vnlock || result != 0)
471 * Apparent success, except that the vnode
472 * mutated between snapshot file vnode and
473 * regular file vnode while this process
474 * slept. The lock currently held is not the
475 * right lock. Release it, and try to get the
479 if ((flags & (LK_INTERLOCK | LK_NOWAIT)) ==
480 (LK_INTERLOCK | LK_NOWAIT))
482 if ((flags & LK_TYPE_MASK) == LK_UPGRADE)
483 flags = (flags & ~LK_TYPE_MASK) | LK_EXCLUSIVE;
484 flags &= ~LK_INTERLOCK;
488 result = VOP_LOCK1_APV(&ufs_vnodeops, ap);
493 * See above for an explanation.
495 if ((ap->a_flags & LK_NODDLKTREAT) != 0)
496 ap->a_flags |= LK_ADAPTIVE;
497 return (VOP_LOCK1_APV(&ufs_vnodeops, ap));
503 ffs_unlock_debug(struct vop_unlock_args *ap)
505 struct vnode *vp = ap->a_vp;
506 struct inode *ip = VTOI(vp);
508 if (ip->i_flag & UFS_INODE_FLAG_LAZY_MASK_ASSERTABLE) {
509 if ((vp->v_mflag & VMP_LAZYLIST) == 0) {
511 VNASSERT((vp->v_mflag & VMP_LAZYLIST), vp,
512 ("%s: modified vnode (%x) not on lazy list",
513 __func__, ip->i_flag));
517 return (VOP_UNLOCK_APV(&ufs_vnodeops, ap));
522 ffs_read_hole(struct uio *uio, long xfersize, long *size)
524 ssize_t saved_resid, tlen;
527 while (xfersize > 0) {
528 tlen = min(xfersize, ZERO_REGION_SIZE);
529 saved_resid = uio->uio_resid;
530 error = vn_io_fault_uiomove(__DECONST(void *, zero_region),
534 tlen = saved_resid - uio->uio_resid;
542 * Vnode op for reading.
546 struct vop_read_args /* {
550 struct ucred *a_cred;
558 ufs_lbn_t lbn, nextlbn;
560 long size, xfersize, blkoffset;
562 int bflag, error, ioflag, seqcount;
566 ioflag = ap->a_ioflag;
567 if (ap->a_ioflag & IO_EXT)
569 return (ffs_extread(vp, uio, ioflag));
571 panic("ffs_read+IO_EXT");
574 if ((ioflag & IO_DIRECT) != 0) {
577 error = ffs_rawread(vp, uio, &workdone);
578 if (error != 0 || workdone != 0)
583 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
587 if (uio->uio_rw != UIO_READ)
588 panic("ffs_read: mode");
590 if (vp->v_type == VLNK) {
591 if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen)
592 panic("ffs_read: short symlink");
593 } else if (vp->v_type != VREG && vp->v_type != VDIR)
594 panic("ffs_read: type %d", vp->v_type);
596 orig_resid = uio->uio_resid;
597 KASSERT(orig_resid >= 0, ("ffs_read: uio->uio_resid < 0"));
600 KASSERT(uio->uio_offset >= 0, ("ffs_read: uio->uio_offset < 0"));
602 if (uio->uio_offset < ip->i_size &&
603 uio->uio_offset >= fs->fs_maxfilesize)
606 bflag = GB_UNMAPPED | (uio->uio_segflg == UIO_NOCOPY ? 0 : GB_NOSPARSE);
607 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
608 if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0)
610 lbn = lblkno(fs, uio->uio_offset);
614 * size of buffer. The buffer representing the
615 * end of the file is rounded up to the size of
616 * the block type ( fragment or full block,
619 size = blksize(fs, ip, lbn);
620 blkoffset = blkoff(fs, uio->uio_offset);
623 * The amount we want to transfer in this iteration is
624 * one FS block less the amount of the data before
625 * our startpoint (duh!)
627 xfersize = fs->fs_bsize - blkoffset;
630 * But if we actually want less than the block,
631 * or the file doesn't have a whole block more of data,
632 * then use the lesser number.
634 if (uio->uio_resid < xfersize)
635 xfersize = uio->uio_resid;
636 if (bytesinfile < xfersize)
637 xfersize = bytesinfile;
639 if (lblktosize(fs, nextlbn) >= ip->i_size) {
641 * Don't do readahead if this is the end of the file.
643 error = bread_gb(vp, lbn, size, NOCRED, bflag, &bp);
644 } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
646 * Otherwise if we are allowed to cluster,
647 * grab as much as we can.
649 * XXX This may not be a win if we are not
650 * doing sequential access.
652 error = cluster_read(vp, ip->i_size, lbn,
653 size, NOCRED, blkoffset + uio->uio_resid,
654 seqcount, bflag, &bp);
655 } else if (seqcount > 1) {
657 * If we are NOT allowed to cluster, then
658 * if we appear to be acting sequentially,
659 * fire off a request for a readahead
660 * as well as a read. Note that the 4th and 5th
661 * arguments point to arrays of the size specified in
664 u_int nextsize = blksize(fs, ip, nextlbn);
665 error = breadn_flags(vp, lbn, lbn, size, &nextlbn,
666 &nextsize, 1, NOCRED, bflag, NULL, &bp);
669 * Failing all of the above, just read what the
670 * user asked for. Interestingly, the same as
671 * the first option above.
673 error = bread_gb(vp, lbn, size, NOCRED, bflag, &bp);
675 if (error == EJUSTRETURN) {
676 error = ffs_read_hole(uio, xfersize, &size);
687 * We should only get non-zero b_resid when an I/O error
688 * has occurred, which should cause us to break above.
689 * However, if the short read did not cause an error,
690 * then we want to ensure that we do not uiomove bad
691 * or uninitialized data.
694 if (size < xfersize) {
700 if (buf_mapped(bp)) {
701 error = vn_io_fault_uiomove((char *)bp->b_data +
702 blkoffset, (int)xfersize, uio);
704 error = vn_io_fault_pgmove(bp->b_pages, blkoffset,
710 vfs_bio_brelse(bp, ioflag);
714 * This can only happen in the case of an error
715 * because the loop above resets bp to NULL on each iteration
716 * and on normal completion has not set a new value into it.
717 * so it must have come from a 'break' statement
720 vfs_bio_brelse(bp, ioflag);
722 if ((error == 0 || uio->uio_resid != orig_resid) &&
723 (vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0)
724 UFS_INODE_SET_FLAG_SHARED(ip, IN_ACCESS);
729 * Vnode op for writing.
733 struct vop_write_args /* {
737 struct ucred *a_cred;
749 int blkoffset, error, flags, ioflag, size, xfersize;
753 ioflag = ap->a_ioflag;
754 if (ap->a_ioflag & IO_EXT)
756 return (ffs_extwrite(vp, uio, ioflag, ap->a_cred));
758 panic("ffs_write+IO_EXT");
761 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
765 if (uio->uio_rw != UIO_WRITE)
766 panic("ffs_write: mode");
769 switch (vp->v_type) {
771 if (ioflag & IO_APPEND)
772 uio->uio_offset = ip->i_size;
773 if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size)
779 panic("ffs_write: dir write");
782 panic("ffs_write: type %p %d (%d,%d)", vp, (int)vp->v_type,
783 (int)uio->uio_offset,
788 KASSERT(uio->uio_resid >= 0, ("ffs_write: uio->uio_resid < 0"));
789 KASSERT(uio->uio_offset >= 0, ("ffs_write: uio->uio_offset < 0"));
791 if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->fs_maxfilesize)
794 * Maybe this should be above the vnode op call, but so long as
795 * file servers have no limits, I don't think it matters.
797 if (vn_rlimit_fsize(vp, uio, uio->uio_td))
800 resid = uio->uio_resid;
802 if (seqcount > BA_SEQMAX)
803 flags = BA_SEQMAX << BA_SEQSHIFT;
805 flags = seqcount << BA_SEQSHIFT;
806 if (ioflag & IO_SYNC)
808 flags |= BA_UNMAPPED;
810 for (error = 0; uio->uio_resid > 0;) {
811 lbn = lblkno(fs, uio->uio_offset);
812 blkoffset = blkoff(fs, uio->uio_offset);
813 xfersize = fs->fs_bsize - blkoffset;
814 if (uio->uio_resid < xfersize)
815 xfersize = uio->uio_resid;
816 if (uio->uio_offset + xfersize > ip->i_size)
817 vnode_pager_setsize(vp, uio->uio_offset + xfersize);
820 * We must perform a read-before-write if the transfer size
821 * does not cover the entire buffer.
823 if (fs->fs_bsize > xfersize)
827 /* XXX is uio->uio_offset the right thing here? */
828 error = UFS_BALLOC(vp, uio->uio_offset, xfersize,
829 ap->a_cred, flags, &bp);
831 vnode_pager_setsize(vp, ip->i_size);
834 if ((ioflag & (IO_SYNC|IO_INVAL)) == (IO_SYNC|IO_INVAL))
835 bp->b_flags |= B_NOCACHE;
837 if (uio->uio_offset + xfersize > ip->i_size) {
838 ip->i_size = uio->uio_offset + xfersize;
839 DIP_SET(ip, i_size, ip->i_size);
840 UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE);
843 size = blksize(fs, ip, lbn) - bp->b_resid;
847 if (buf_mapped(bp)) {
848 error = vn_io_fault_uiomove((char *)bp->b_data +
849 blkoffset, (int)xfersize, uio);
851 error = vn_io_fault_pgmove(bp->b_pages, blkoffset,
855 * If the buffer is not already filled and we encounter an
856 * error while trying to fill it, we have to clear out any
857 * garbage data from the pages instantiated for the buffer.
858 * If we do not, a failed uiomove() during a write can leave
859 * the prior contents of the pages exposed to a userland mmap.
861 * Note that we need only clear buffers with a transfer size
862 * equal to the block size because buffers with a shorter
863 * transfer size were cleared above by the call to UFS_BALLOC()
864 * with the BA_CLRBUF flag set.
866 * If the source region for uiomove identically mmaps the
867 * buffer, uiomove() performed the NOP copy, and the buffer
868 * content remains valid because the page fault handler
869 * validated the pages.
871 if (error != 0 && (bp->b_flags & B_CACHE) == 0 &&
872 fs->fs_bsize == xfersize)
875 vfs_bio_set_flags(bp, ioflag);
878 * If IO_SYNC each buffer is written synchronously. Otherwise
879 * if we have a severe page deficiency write the buffer
880 * asynchronously. Otherwise try to cluster, and if that
881 * doesn't do it then either do an async write (if O_DIRECT),
882 * or a delayed write (if not).
884 if (ioflag & IO_SYNC) {
886 } else if (vm_page_count_severe() ||
887 buf_dirty_count_severe() ||
888 (ioflag & IO_ASYNC)) {
889 bp->b_flags |= B_CLUSTEROK;
891 } else if (xfersize + blkoffset == fs->fs_bsize) {
892 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
893 bp->b_flags |= B_CLUSTEROK;
894 cluster_write(vp, bp, ip->i_size, seqcount,
899 } else if (ioflag & IO_DIRECT) {
900 bp->b_flags |= B_CLUSTEROK;
903 bp->b_flags |= B_CLUSTEROK;
906 if (error || xfersize == 0)
908 UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
911 * If we successfully wrote any data, and we are not the superuser
912 * we clear the setuid and setgid bits as a precaution against
915 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid &&
917 if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID)) {
918 vn_seqc_write_begin(vp);
919 UFS_INODE_SET_MODE(ip, ip->i_mode & ~(ISUID | ISGID));
920 DIP_SET(ip, i_mode, ip->i_mode);
921 vn_seqc_write_end(vp);
925 if (ioflag & IO_UNIT) {
926 (void)ffs_truncate(vp, osize,
927 IO_NORMAL | (ioflag & IO_SYNC), ap->a_cred);
928 uio->uio_offset -= resid - uio->uio_resid;
929 uio->uio_resid = resid;
931 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) {
932 error = ffs_update(vp, 1);
933 if (ffs_fsfail_cleanup(VFSTOUFS(vp->v_mount), error))
940 * Extended attribute area reading.
943 ffs_extread(struct vnode *vp, struct uio *uio, int ioflag)
946 struct ufs2_dinode *dp;
949 ufs_lbn_t lbn, nextlbn;
951 long size, xfersize, blkoffset;
960 if (uio->uio_rw != UIO_READ || fs->fs_magic != FS_UFS2_MAGIC)
961 panic("ffs_extread: mode");
964 orig_resid = uio->uio_resid;
965 KASSERT(orig_resid >= 0, ("ffs_extread: uio->uio_resid < 0"));
968 KASSERT(uio->uio_offset >= 0, ("ffs_extread: uio->uio_offset < 0"));
970 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
971 if ((bytesinfile = dp->di_extsize - uio->uio_offset) <= 0)
973 lbn = lblkno(fs, uio->uio_offset);
977 * size of buffer. The buffer representing the
978 * end of the file is rounded up to the size of
979 * the block type ( fragment or full block,
982 size = sblksize(fs, dp->di_extsize, lbn);
983 blkoffset = blkoff(fs, uio->uio_offset);
986 * The amount we want to transfer in this iteration is
987 * one FS block less the amount of the data before
988 * our startpoint (duh!)
990 xfersize = fs->fs_bsize - blkoffset;
993 * But if we actually want less than the block,
994 * or the file doesn't have a whole block more of data,
995 * then use the lesser number.
997 if (uio->uio_resid < xfersize)
998 xfersize = uio->uio_resid;
999 if (bytesinfile < xfersize)
1000 xfersize = bytesinfile;
1002 if (lblktosize(fs, nextlbn) >= dp->di_extsize) {
1004 * Don't do readahead if this is the end of the info.
1006 error = bread(vp, -1 - lbn, size, NOCRED, &bp);
1009 * If we have a second block, then
1010 * fire off a request for a readahead
1011 * as well as a read. Note that the 4th and 5th
1012 * arguments point to arrays of the size specified in
1015 u_int nextsize = sblksize(fs, dp->di_extsize, nextlbn);
1017 nextlbn = -1 - nextlbn;
1018 error = breadn(vp, -1 - lbn,
1019 size, &nextlbn, &nextsize, 1, NOCRED, &bp);
1028 * We should only get non-zero b_resid when an I/O error
1029 * has occurred, which should cause us to break above.
1030 * However, if the short read did not cause an error,
1031 * then we want to ensure that we do not uiomove bad
1032 * or uninitialized data.
1034 size -= bp->b_resid;
1035 if (size < xfersize) {
1041 error = uiomove((char *)bp->b_data + blkoffset,
1042 (int)xfersize, uio);
1045 vfs_bio_brelse(bp, ioflag);
1049 * This can only happen in the case of an error
1050 * because the loop above resets bp to NULL on each iteration
1051 * and on normal completion has not set a new value into it.
1052 * so it must have come from a 'break' statement
1055 vfs_bio_brelse(bp, ioflag);
1060 * Extended attribute area writing.
1063 ffs_extwrite(struct vnode *vp, struct uio *uio, int ioflag, struct ucred *ucred)
1066 struct ufs2_dinode *dp;
1072 int blkoffset, error, flags, size, xfersize;
1079 if (uio->uio_rw != UIO_WRITE || fs->fs_magic != FS_UFS2_MAGIC)
1080 panic("ffs_extwrite: mode");
1083 if (ioflag & IO_APPEND)
1084 uio->uio_offset = dp->di_extsize;
1085 KASSERT(uio->uio_offset >= 0, ("ffs_extwrite: uio->uio_offset < 0"));
1086 KASSERT(uio->uio_resid >= 0, ("ffs_extwrite: uio->uio_resid < 0"));
1087 if ((uoff_t)uio->uio_offset + uio->uio_resid >
1088 UFS_NXADDR * fs->fs_bsize)
1091 resid = uio->uio_resid;
1092 osize = dp->di_extsize;
1094 if (ioflag & IO_SYNC)
1097 for (error = 0; uio->uio_resid > 0;) {
1098 lbn = lblkno(fs, uio->uio_offset);
1099 blkoffset = blkoff(fs, uio->uio_offset);
1100 xfersize = fs->fs_bsize - blkoffset;
1101 if (uio->uio_resid < xfersize)
1102 xfersize = uio->uio_resid;
1105 * We must perform a read-before-write if the transfer size
1106 * does not cover the entire buffer.
1108 if (fs->fs_bsize > xfersize)
1111 flags &= ~BA_CLRBUF;
1112 error = UFS_BALLOC(vp, uio->uio_offset, xfersize,
1117 * If the buffer is not valid we have to clear out any
1118 * garbage data from the pages instantiated for the buffer.
1119 * If we do not, a failed uiomove() during a write can leave
1120 * the prior contents of the pages exposed to a userland
1121 * mmap(). XXX deal with uiomove() errors a better way.
1123 if ((bp->b_flags & B_CACHE) == 0 && fs->fs_bsize <= xfersize)
1126 if (uio->uio_offset + xfersize > dp->di_extsize) {
1127 dp->di_extsize = uio->uio_offset + xfersize;
1128 UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE);
1131 size = sblksize(fs, dp->di_extsize, lbn) - bp->b_resid;
1132 if (size < xfersize)
1136 uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio);
1138 vfs_bio_set_flags(bp, ioflag);
1141 * If IO_SYNC each buffer is written synchronously. Otherwise
1142 * if we have a severe page deficiency write the buffer
1143 * asynchronously. Otherwise try to cluster, and if that
1144 * doesn't do it then either do an async write (if O_DIRECT),
1145 * or a delayed write (if not).
1147 if (ioflag & IO_SYNC) {
1149 } else if (vm_page_count_severe() ||
1150 buf_dirty_count_severe() ||
1151 xfersize + blkoffset == fs->fs_bsize ||
1152 (ioflag & (IO_ASYNC | IO_DIRECT)))
1156 if (error || xfersize == 0)
1158 UFS_INODE_SET_FLAG(ip, IN_CHANGE);
1161 * If we successfully wrote any data, and we are not the superuser
1162 * we clear the setuid and setgid bits as a precaution against
1165 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && ucred) {
1166 if (priv_check_cred(ucred, PRIV_VFS_RETAINSUGID)) {
1167 vn_seqc_write_begin(vp);
1168 UFS_INODE_SET_MODE(ip, ip->i_mode & ~(ISUID | ISGID));
1169 dp->di_mode = ip->i_mode;
1170 vn_seqc_write_end(vp);
1174 if (ioflag & IO_UNIT) {
1175 (void)ffs_truncate(vp, osize,
1176 IO_EXT | (ioflag&IO_SYNC), ucred);
1177 uio->uio_offset -= resid - uio->uio_resid;
1178 uio->uio_resid = resid;
1180 } else if (resid > uio->uio_resid && (ioflag & IO_SYNC))
1181 error = ffs_update(vp, 1);
1186 * Vnode operating to retrieve a named extended attribute.
1188 * Locate a particular EA (nspace:name) in the area (ptr:length), and return
1189 * the length of the EA, and possibly the pointer to the entry and to the data.
1192 ffs_findextattr(u_char *ptr, u_int length, int nspace, const char *name,
1193 struct extattr **eapp, u_char **eac)
1195 struct extattr *eap, *eaend;
1198 nlen = strlen(name);
1199 KASSERT(ALIGNED_TO(ptr, struct extattr), ("unaligned"));
1200 eap = (struct extattr *)ptr;
1201 eaend = (struct extattr *)(ptr + length);
1202 for (; eap < eaend; eap = EXTATTR_NEXT(eap)) {
1203 KASSERT(EXTATTR_NEXT(eap) <= eaend,
1204 ("extattr next %p beyond %p", EXTATTR_NEXT(eap), eaend));
1205 if (eap->ea_namespace != nspace || eap->ea_namelength != nlen
1206 || memcmp(eap->ea_name, name, nlen) != 0)
1211 *eac = EXTATTR_CONTENT(eap);
1212 return (EXTATTR_CONTENT_SIZE(eap));
1218 ffs_rdextattr(u_char **p, struct vnode *vp, struct thread *td)
1220 const struct extattr *eap, *eaend, *eapnext;
1222 struct ufs2_dinode *dp;
1225 struct iovec liovec;
1233 easize = dp->di_extsize;
1234 if ((uoff_t)easize > UFS_NXADDR * fs->fs_bsize)
1237 eae = malloc(easize, M_TEMP, M_WAITOK);
1239 liovec.iov_base = eae;
1240 liovec.iov_len = easize;
1241 luio.uio_iov = &liovec;
1242 luio.uio_iovcnt = 1;
1243 luio.uio_offset = 0;
1244 luio.uio_resid = easize;
1245 luio.uio_segflg = UIO_SYSSPACE;
1246 luio.uio_rw = UIO_READ;
1249 error = ffs_extread(vp, &luio, IO_EXT | IO_SYNC);
1254 /* Validate disk xattrfile contents. */
1255 for (eap = (void *)eae, eaend = (void *)(eae + easize); eap < eaend;
1257 eapnext = EXTATTR_NEXT(eap);
1258 /* Bogusly short entry or bogusly long entry. */
1259 if (eap->ea_length < sizeof(*eap) || eapnext > eaend) {
1261 return (EINTEGRITY);
1269 ffs_lock_ea(struct vnode *vp)
1275 while (ip->i_flag & IN_EA_LOCKED) {
1276 UFS_INODE_SET_FLAG(ip, IN_EA_LOCKWAIT);
1277 msleep(&ip->i_ea_refs, &vp->v_interlock, PINOD + 2, "ufs_ea",
1280 UFS_INODE_SET_FLAG(ip, IN_EA_LOCKED);
1285 ffs_unlock_ea(struct vnode *vp)
1291 if (ip->i_flag & IN_EA_LOCKWAIT)
1292 wakeup(&ip->i_ea_refs);
1293 ip->i_flag &= ~(IN_EA_LOCKED | IN_EA_LOCKWAIT);
1298 ffs_open_ea(struct vnode *vp, struct ucred *cred, struct thread *td)
1301 struct ufs2_dinode *dp;
1307 if (ip->i_ea_area != NULL) {
1313 error = ffs_rdextattr(&ip->i_ea_area, vp, td);
1318 ip->i_ea_len = dp->di_extsize;
1326 * Vnode extattr transaction commit/abort
1329 ffs_close_ea(struct vnode *vp, int commit, struct ucred *cred, struct thread *td)
1333 struct iovec liovec;
1335 struct ufs2_dinode *dp;
1340 if (ip->i_ea_area == NULL) {
1345 error = ip->i_ea_error;
1346 if (commit && error == 0) {
1347 ASSERT_VOP_ELOCKED(vp, "ffs_close_ea commit");
1349 cred = vp->v_mount->mnt_cred;
1350 liovec.iov_base = ip->i_ea_area;
1351 liovec.iov_len = ip->i_ea_len;
1352 luio.uio_iov = &liovec;
1353 luio.uio_iovcnt = 1;
1354 luio.uio_offset = 0;
1355 luio.uio_resid = ip->i_ea_len;
1356 luio.uio_segflg = UIO_SYSSPACE;
1357 luio.uio_rw = UIO_WRITE;
1359 /* XXX: I'm not happy about truncating to zero size */
1360 if (ip->i_ea_len < dp->di_extsize)
1361 error = ffs_truncate(vp, 0, IO_EXT, cred);
1362 error = ffs_extwrite(vp, &luio, IO_EXT | IO_SYNC, cred);
1364 if (--ip->i_ea_refs == 0) {
1365 free(ip->i_ea_area, M_TEMP);
1366 ip->i_ea_area = NULL;
1375 * Vnode extattr strategy routine for fifos.
1377 * We need to check for a read or write of the external attributes.
1378 * Otherwise we just fall through and do the usual thing.
1381 ffsext_strategy(struct vop_strategy_args *ap)
1383 struct vop_strategy_args {
1384 struct vnodeop_desc *a_desc;
1394 lbn = ap->a_bp->b_lblkno;
1395 if (I_IS_UFS2(VTOI(vp)) && lbn < 0 && lbn >= -UFS_NXADDR)
1396 return (VOP_STRATEGY_APV(&ufs_vnodeops, ap));
1397 if (vp->v_type == VFIFO)
1398 return (VOP_STRATEGY_APV(&ufs_fifoops, ap));
1399 panic("spec nodes went here");
1403 * Vnode extattr transaction commit/abort
1406 ffs_openextattr(struct vop_openextattr_args *ap)
1408 struct vop_openextattr_args {
1409 struct vnodeop_desc *a_desc;
1411 IN struct ucred *a_cred;
1412 IN struct thread *a_td;
1417 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1418 return (EOPNOTSUPP);
1420 return (ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td));
1424 * Vnode extattr transaction commit/abort
1427 ffs_closeextattr(struct vop_closeextattr_args *ap)
1429 struct vop_closeextattr_args {
1430 struct vnodeop_desc *a_desc;
1433 IN struct ucred *a_cred;
1434 IN struct thread *a_td;
1439 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1440 return (EOPNOTSUPP);
1442 if (ap->a_commit && (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY))
1445 return (ffs_close_ea(ap->a_vp, ap->a_commit, ap->a_cred, ap->a_td));
1449 * Vnode operation to remove a named attribute.
1452 ffs_deleteextattr(struct vop_deleteextattr_args *ap)
1455 IN struct vnode *a_vp;
1456 IN int a_attrnamespace;
1457 IN const char *a_name;
1458 IN struct ucred *a_cred;
1459 IN struct thread *a_td;
1464 struct extattr *eap;
1466 int olen, error, i, easize;
1470 ip = VTOI(ap->a_vp);
1472 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1473 return (EOPNOTSUPP);
1475 if (strlen(ap->a_name) == 0)
1478 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1481 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1482 ap->a_cred, ap->a_td, VWRITE);
1485 * ffs_lock_ea is not needed there, because the vnode
1486 * must be exclusively locked.
1488 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1489 ip->i_ea_error = error;
1493 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1497 /* CEM: delete could be done in-place instead */
1498 eae = malloc(ip->i_ea_len, M_TEMP, M_WAITOK);
1499 bcopy(ip->i_ea_area, eae, ip->i_ea_len);
1500 easize = ip->i_ea_len;
1502 olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1505 /* delete but nonexistent */
1507 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1510 ul = eap->ea_length;
1511 i = (u_char *)EXTATTR_NEXT(eap) - eae;
1512 bcopy(EXTATTR_NEXT(eap), eap, easize - i);
1515 tmp = ip->i_ea_area;
1516 ip->i_ea_area = eae;
1517 ip->i_ea_len = easize;
1519 error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td);
1524 * Vnode operation to retrieve a named extended attribute.
1527 ffs_getextattr(struct vop_getextattr_args *ap)
1530 IN struct vnode *a_vp;
1531 IN int a_attrnamespace;
1532 IN const char *a_name;
1533 INOUT struct uio *a_uio;
1535 IN struct ucred *a_cred;
1536 IN struct thread *a_td;
1545 ip = VTOI(ap->a_vp);
1547 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1548 return (EOPNOTSUPP);
1550 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1551 ap->a_cred, ap->a_td, VREAD);
1555 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1559 eae = ip->i_ea_area;
1560 easize = ip->i_ea_len;
1562 ealen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1566 if (ap->a_size != NULL)
1567 *ap->a_size = ealen;
1568 else if (ap->a_uio != NULL)
1569 error = uiomove(p, ealen, ap->a_uio);
1573 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1578 * Vnode operation to retrieve extended attributes on a vnode.
1581 ffs_listextattr(struct vop_listextattr_args *ap)
1584 IN struct vnode *a_vp;
1585 IN int a_attrnamespace;
1586 INOUT struct uio *a_uio;
1588 IN struct ucred *a_cred;
1589 IN struct thread *a_td;
1594 struct extattr *eap, *eaend;
1597 ip = VTOI(ap->a_vp);
1599 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1600 return (EOPNOTSUPP);
1602 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1603 ap->a_cred, ap->a_td, VREAD);
1607 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1612 if (ap->a_size != NULL)
1615 KASSERT(ALIGNED_TO(ip->i_ea_area, struct extattr), ("unaligned"));
1616 eap = (struct extattr *)ip->i_ea_area;
1617 eaend = (struct extattr *)(ip->i_ea_area + ip->i_ea_len);
1618 for (; error == 0 && eap < eaend; eap = EXTATTR_NEXT(eap)) {
1619 KASSERT(EXTATTR_NEXT(eap) <= eaend,
1620 ("extattr next %p beyond %p", EXTATTR_NEXT(eap), eaend));
1621 if (eap->ea_namespace != ap->a_attrnamespace)
1624 ealen = eap->ea_namelength;
1625 if (ap->a_size != NULL)
1626 *ap->a_size += ealen + 1;
1627 else if (ap->a_uio != NULL)
1628 error = uiomove(&eap->ea_namelength, ealen + 1,
1632 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1637 * Vnode operation to set a named attribute.
1640 ffs_setextattr(struct vop_setextattr_args *ap)
1643 IN struct vnode *a_vp;
1644 IN int a_attrnamespace;
1645 IN const char *a_name;
1646 INOUT struct uio *a_uio;
1647 IN struct ucred *a_cred;
1648 IN struct thread *a_td;
1654 struct extattr *eap;
1655 uint32_t ealength, ul;
1657 int olen, eapad1, eapad2, error, i, easize;
1661 ip = VTOI(ap->a_vp);
1664 if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK)
1665 return (EOPNOTSUPP);
1667 if (strlen(ap->a_name) == 0)
1670 /* XXX Now unsupported API to delete EAs using NULL uio. */
1671 if (ap->a_uio == NULL)
1672 return (EOPNOTSUPP);
1674 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1677 ealen = ap->a_uio->uio_resid;
1678 if (ealen < 0 || ealen > lblktosize(fs, UFS_NXADDR))
1681 error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
1682 ap->a_cred, ap->a_td, VWRITE);
1685 * ffs_lock_ea is not needed there, because the vnode
1686 * must be exclusively locked.
1688 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1689 ip->i_ea_error = error;
1693 error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td);
1697 ealength = sizeof(uint32_t) + 3 + strlen(ap->a_name);
1698 eapad1 = roundup2(ealength, 8) - ealength;
1699 eapad2 = roundup2(ealen, 8) - ealen;
1700 ealength += eapad1 + ealen + eapad2;
1703 * CEM: rewrites of the same size or smaller could be done in-place
1704 * instead. (We don't acquire any fine-grained locks in here either,
1705 * so we could also do bigger writes in-place.)
1707 eae = malloc(ip->i_ea_len + ealength, M_TEMP, M_WAITOK);
1708 bcopy(ip->i_ea_area, eae, ip->i_ea_len);
1709 easize = ip->i_ea_len;
1711 olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name,
1714 /* new, append at end */
1715 KASSERT(ALIGNED_TO(eae + easize, struct extattr),
1717 eap = (struct extattr *)(eae + easize);
1720 ul = eap->ea_length;
1721 i = (u_char *)EXTATTR_NEXT(eap) - eae;
1722 if (ul != ealength) {
1723 bcopy(EXTATTR_NEXT(eap), (u_char *)eap + ealength,
1725 easize += (ealength - ul);
1728 if (easize > lblktosize(fs, UFS_NXADDR)) {
1730 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1731 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1732 ip->i_ea_error = ENOSPC;
1735 eap->ea_length = ealength;
1736 eap->ea_namespace = ap->a_attrnamespace;
1737 eap->ea_contentpadlen = eapad2;
1738 eap->ea_namelength = strlen(ap->a_name);
1739 memcpy(eap->ea_name, ap->a_name, strlen(ap->a_name));
1740 bzero(&eap->ea_name[strlen(ap->a_name)], eapad1);
1741 error = uiomove(EXTATTR_CONTENT(eap), ealen, ap->a_uio);
1744 ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td);
1745 if (ip->i_ea_area != NULL && ip->i_ea_error == 0)
1746 ip->i_ea_error = error;
1749 bzero((u_char *)EXTATTR_CONTENT(eap) + ealen, eapad2);
1751 tmp = ip->i_ea_area;
1752 ip->i_ea_area = eae;
1753 ip->i_ea_len = easize;
1755 error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td);
1760 * Vnode pointer to File handle
1763 ffs_vptofh(struct vop_vptofh_args *ap)
1766 IN struct vnode *a_vp;
1767 IN struct fid *a_fhp;
1774 ip = VTOI(ap->a_vp);
1775 ufhp = (struct ufid *)ap->a_fhp;
1776 ufhp->ufid_len = sizeof(struct ufid);
1777 ufhp->ufid_ino = ip->i_number;
1778 ufhp->ufid_gen = ip->i_gen;
1782 SYSCTL_DECL(_vfs_ffs);
1783 static int use_buf_pager = 1;
1784 SYSCTL_INT(_vfs_ffs, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, &use_buf_pager, 0,
1785 "Always use buffer pager instead of bmap");
1788 ffs_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
1791 return (lblkno(VFSTOUFS(vp->v_mount)->um_fs, off));
1795 ffs_gbp_getblksz(struct vnode *vp, daddr_t lbn)
1798 return (blksize(VFSTOUFS(vp->v_mount)->um_fs, VTOI(vp), lbn));
1802 ffs_getpages(struct vop_getpages_args *ap)
1805 struct ufsmount *um;
1808 um = VFSTOUFS(vp->v_mount);
1810 if (!use_buf_pager && um->um_devvp->v_bufobj.bo_bsize <= PAGE_SIZE)
1811 return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
1812 ap->a_rbehind, ap->a_rahead, NULL, NULL));
1813 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
1814 ap->a_rahead, ffs_gbp_getblkno, ffs_gbp_getblksz));
1818 ffs_getpages_async(struct vop_getpages_async_args *ap)
1821 struct ufsmount *um;
1826 um = VFSTOUFS(vp->v_mount);
1829 if (um->um_devvp->v_bufobj.bo_bsize <= PAGE_SIZE) {
1830 error = vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
1831 ap->a_rbehind, ap->a_rahead, ap->a_iodone, ap->a_arg);
1835 error = vfs_bio_getpages(vp, ap->a_m, ap->a_count,
1836 ap->a_rbehind, ap->a_rahead, ffs_gbp_getblkno,
1839 if (do_iodone && ap->a_iodone != NULL)
1840 ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error);