d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Detect if the the offset used to read from a raw device loose bits

Browse Source 
when converted to block number.
This commit is contained in:
Poul-Henning Kamp 1999-08-21 06:48:16 +00:00
parent fcb893a801
commit 3b782ee9d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=50108
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sys/kern/kern_physio.c
View File

@ -16,7 +16,7 @@
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: kern_physio.c,v 1.35 1999/06/26 02:46:02 mckusick Exp $
* $Id: kern_physio.c,v 1.36 1999/08/14 11:40:42 phk Exp $
*/
#include <sys/param.h>
@ -57,6 +57,7 @@ physio(bp, dev, rw, minp, uio)
int error;
int spl;
caddr_t sa;
off_t blockno;
int bp_alloc = (bp == 0);
struct buf *bpa;
@ -95,7 +96,12 @@ physio(bp, dev, rw, minp, uio)
* for the temporary kernel mapping.
*/
bp->b_saveaddr = sa;
bp->b_blkno = btodb(uio->uio_offset);
blockno = uio->uio_offset >> DEV_BSHIFT;
bp->b_blkno = blockno;
if (bp->b_blkno != blockno) {
error = EINVAL;
goto doerror;
}
bp->b_offset = uio->uio_offset;
if (uio->uio_segflg == UIO_USERSPACE) {