275 lines
8.0 KiB
C
275 lines
8.0 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/conf.h>
|
|
|
|
#include <machine/limits.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_page.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
|
|
static int ffs_fsync __P((struct vop_fsync_args *));
|
|
static int ffs_getpages __P((struct vop_getpages_args *));
|
|
static int ffs_putpages __P((struct vop_putpages_args *));
|
|
static int ffs_read __P((struct vop_read_args *));
|
|
static int ffs_write __P((struct vop_write_args *));
|
|
|
|
/* Global vfs data structures for ufs. */
|
|
vop_t **ffs_vnodeop_p;
|
|
static struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) ufs_vnoperate },
|
|
{ &vop_fsync_desc, (vop_t *) ffs_fsync },
|
|
{ &vop_getpages_desc, (vop_t *) ffs_getpages },
|
|
{ &vop_putpages_desc, (vop_t *) ffs_putpages },
|
|
{ &vop_read_desc, (vop_t *) ffs_read },
|
|
{ &vop_balloc_desc, (vop_t *) ffs_balloc },
|
|
{ &vop_reallocblks_desc, (vop_t *) ffs_reallocblks },
|
|
{ &vop_write_desc, (vop_t *) ffs_write },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc ffs_vnodeop_opv_desc =
|
|
{ &ffs_vnodeop_p, ffs_vnodeop_entries };
|
|
|
|
vop_t **ffs_specop_p;
|
|
static struct vnodeopv_entry_desc ffs_specop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) ufs_vnoperatespec },
|
|
{ &vop_fsync_desc, (vop_t *) ffs_fsync },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc ffs_specop_opv_desc =
|
|
{ &ffs_specop_p, ffs_specop_entries };
|
|
|
|
vop_t **ffs_fifoop_p;
|
|
static struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) ufs_vnoperatefifo },
|
|
{ &vop_fsync_desc, (vop_t *) ffs_fsync },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc ffs_fifoop_opv_desc =
|
|
{ &ffs_fifoop_p, ffs_fifoop_entries };
|
|
|
|
VNODEOP_SET(ffs_vnodeop_opv_desc);
|
|
VNODEOP_SET(ffs_specop_opv_desc);
|
|
VNODEOP_SET(ffs_fifoop_opv_desc);
|
|
|
|
#include <ufs/ufs/ufs_readwrite.c>
|
|
|
|
/*
|
|
* Synch an open file.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
ffs_fsync(ap)
|
|
struct vop_fsync_args /* {
|
|
struct vnode *a_vp;
|
|
struct ucred *a_cred;
|
|
int a_waitfor;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct buf *bp;
|
|
struct buf *nbp;
|
|
int s, error, wait, passes, skipmeta;
|
|
daddr_t lbn;
|
|
|
|
wait = (ap->a_waitfor == MNT_WAIT);
|
|
if (vn_isdisk(vp, NULL)) {
|
|
lbn = INT_MAX;
|
|
if (vp->v_specmountpoint != NULL &&
|
|
(vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP))
|
|
softdep_fsync_mountdev(vp);
|
|
} else {
|
|
struct inode *ip;
|
|
ip = VTOI(vp);
|
|
lbn = lblkno(ip->i_fs, (ip->i_size + ip->i_fs->fs_bsize - 1));
|
|
}
|
|
|
|
/*
|
|
* Flush all dirty buffers associated with a vnode.
|
|
*/
|
|
passes = NIADDR + 1;
|
|
skipmeta = 0;
|
|
if (wait)
|
|
skipmeta = 1;
|
|
s = splbio();
|
|
loop:
|
|
for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp;
|
|
bp = TAILQ_NEXT(bp, b_vnbufs))
|
|
bp->b_flags &= ~B_SCANNED;
|
|
for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
|
|
nbp = TAILQ_NEXT(bp, b_vnbufs);
|
|
/*
|
|
* Reasons to skip this buffer: it has already been considered
|
|
* on this pass, this pass is the first time through on a
|
|
* synchronous flush request and the buffer being considered
|
|
* is metadata, the buffer has dependencies that will cause
|
|
* it to be redirtied and it has not already been deferred,
|
|
* or it is already being written.
|
|
*/
|
|
if ((bp->b_flags & B_SCANNED) != 0)
|
|
continue;
|
|
bp->b_flags |= B_SCANNED;
|
|
if ((skipmeta == 1 && bp->b_lblkno < 0))
|
|
continue;
|
|
if (!wait && LIST_FIRST(&bp->b_dep) != NULL &&
|
|
(bp->b_flags & B_DEFERRED) == 0 &&
|
|
bioops.io_countdeps && (*bioops.io_countdeps)(bp, 0)) {
|
|
bp->b_flags |= B_DEFERRED;
|
|
continue;
|
|
}
|
|
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
|
|
continue;
|
|
if ((bp->b_flags & B_DELWRI) == 0)
|
|
panic("ffs_fsync: not dirty");
|
|
if (vp != bp->b_vp)
|
|
panic("ffs_fsync: vp != vp->b_vp");
|
|
/*
|
|
* If this is a synchronous flush request, or it is not a
|
|
* file or device, start the write on this buffer immediatly.
|
|
*/
|
|
if (wait || (vp->v_type != VREG && vp->v_type != VBLK)) {
|
|
|
|
/*
|
|
* On our final pass through, do all I/O synchronously
|
|
* so that we can find out if our flush is failing
|
|
* because of write errors.
|
|
*/
|
|
if (passes > 0 || !wait) {
|
|
if ((bp->b_flags & B_CLUSTEROK) && !wait) {
|
|
BUF_UNLOCK(bp);
|
|
(void) vfs_bio_awrite(bp);
|
|
} else {
|
|
bremfree(bp);
|
|
splx(s);
|
|
(void) bawrite(bp);
|
|
s = splbio();
|
|
}
|
|
} else {
|
|
bremfree(bp);
|
|
splx(s);
|
|
if ((error = bwrite(bp)) != 0)
|
|
return (error);
|
|
s = splbio();
|
|
}
|
|
} else if ((vp->v_type == VREG) && (bp->b_lblkno >= lbn)) {
|
|
/*
|
|
* If the buffer is for data that has been truncated
|
|
* off the file, then throw it away.
|
|
*/
|
|
bremfree(bp);
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
splx(s);
|
|
brelse(bp);
|
|
s = splbio();
|
|
} else {
|
|
BUF_UNLOCK(bp);
|
|
vfs_bio_awrite(bp);
|
|
}
|
|
/*
|
|
* Since we may have slept during the I/O, we need
|
|
* to start from a known point.
|
|
*/
|
|
nbp = TAILQ_FIRST(&vp->v_dirtyblkhd);
|
|
}
|
|
/*
|
|
* If we were asked to do this synchronously, then go back for
|
|
* another pass, this time doing the metadata.
|
|
*/
|
|
if (skipmeta) {
|
|
skipmeta = 0;
|
|
goto loop;
|
|
}
|
|
|
|
if (wait) {
|
|
while (vp->v_numoutput) {
|
|
vp->v_flag |= VBWAIT;
|
|
(void) tsleep((caddr_t)&vp->v_numoutput,
|
|
PRIBIO + 4, "ffsfsn", 0);
|
|
}
|
|
|
|
/*
|
|
* Ensure that any filesystem metatdata associated
|
|
* with the vnode has been written.
|
|
*/
|
|
splx(s);
|
|
if ((error = softdep_sync_metadata(ap)) != 0)
|
|
return (error);
|
|
s = splbio();
|
|
|
|
if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
|
|
/*
|
|
* Block devices associated with filesystems may
|
|
* have new I/O requests posted for them even if
|
|
* the vnode is locked, so no amount of trying will
|
|
* get them clean. Thus we give block devices a
|
|
* good effort, then just give up. For all other file
|
|
* types, go around and try again until it is clean.
|
|
*/
|
|
if (passes > 0) {
|
|
passes -= 1;
|
|
goto loop;
|
|
}
|
|
#ifdef DIAGNOSTIC
|
|
if (!vn_isdisk(vp, NULL))
|
|
vprint("ffs_fsync: dirty", vp);
|
|
#endif
|
|
}
|
|
}
|
|
splx(s);
|
|
return (UFS_UPDATE(vp, wait));
|
|
}
|