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Cast lbn to off_t in a few places, to avoid daddr_t overflow and all sorts 

of havoc. From Bill Sommerfeld.
This commit is contained in:
fvdl 2001-01-22 16:39:54 +00:00
parent d88ce636a9
commit f4ddf5e1b6
1 changed files with 7 additions and 5 deletions
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12
sys/miscfs/genfs/genfs_vnops.c
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@ -1,4 +1,4 @@
/* $NetBSD: genfs_vnops.c,v 1.24 2000/12/27 04:47:43 chs Exp $ */
/* $NetBSD: genfs_vnops.c,v 1.25 2001/01/22 16:39:54 fvdl Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
@ -699,7 +699,8 @@ genfs_getpages(v)
* overwriting pages with valid data.
*/
iobytes = min(((lbn + 1 + run) << fs_bshift) - offset, bytes);
iobytes =
min((((off_t)lbn + 1 + run) << fs_bshift) - offset, bytes);
if (offset + iobytes > round_page(offset)) {
pcount = 1;
while (pidx + pcount < npages &&
@ -757,7 +758,7 @@ genfs_getpages(v)
bp->b_private = mbp;
/* adjust physical blkno for partial blocks */
bp->b_blkno = blkno + ((offset - (lbn << fs_bshift)) >>
bp->b_blkno = blkno + ((offset - ((off_t)lbn << fs_bshift)) >>
dev_bshift);
UVMHIST_LOG(ubchist, "bp %p offset 0x%x bcount 0x%x blkno 0x%x",
@ -987,7 +988,8 @@ genfs_putpages(v)
break;
}
iobytes = min(((lbn + 1 + run) << fs_bshift) - offset, bytes);
iobytes =
min((((off_t)lbn + 1 + run) << fs_bshift) - offset, bytes);
if (blkno == (daddr_t)-1) {
skipbytes += iobytes;
continue;
@ -1015,7 +1017,7 @@ genfs_putpages(v)
bp->b_private = mbp;
/* adjust physical blkno for partial blocks */
bp->b_blkno = blkno + ((offset - (lbn << fs_bshift)) >>
bp->b_blkno = blkno + ((offset - ((off_t)lbn << fs_bshift)) >>
dev_bshift);
UVMHIST_LOG(ubchist, "vp %p offset 0x%x bcount 0x%x blkno 0x%x",
vp, offset, bp->b_bcount, bp->b_blkno);