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Restrict the run of cluster blocks to on-disk contiguous blocks (back out 

part of rev 1.115), to avoid writing over holes.  This is the lesser of two
evils, to be replaced soon.
This commit is contained in:
perseant 2003-04-29 17:45:11 +00:00
parent 0134b3c484
commit 100c8f971f
1 changed files with 8 additions and 4 deletions
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12
sys/ufs/lfs/lfs_vfsops.c
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@ -1,4 +1,4 @@
/* $NetBSD: lfs_vfsops.c,v 1.115 2003/04/23 07:20:38 perseant Exp $ */
/* $NetBSD: lfs_vfsops.c,v 1.116 2003/04/29 17:45:11 perseant Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.115 2003/04/23 07:20:38 perseant Exp $");
__KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.116 2003/04/29 17:45:11 perseant Exp $");
#if defined(_KERNEL_OPT)
#include "opt_quota.h"
@ -1898,9 +1898,13 @@ lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, int flags)
break;
}
iobytes = MIN(MAXPHYS, bytes);
/*
* XXX this finds holes for us, but it also doesn't cluster
* XXX pages which are not already contiguous on disk.
*/
iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset,
bytes);
if (blkno == (daddr_t)-1) {
iobytes = MIN(fs->lfs_bsize, bytes);
skipbytes += iobytes;
continue;
}