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close_drive:

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Correct race condition between caller and daemon.

  Tripped-over-by:	Zach Heilig <zach@uffdaonline.net>
			Bernd Walter <ticso@cicely.de>
			Niels Chr. Bank-Pedersen <ncbp@bank-pedersen.dk>
This commit is contained in:
Greg Lehey 1999-06-29 04:08:51 +00:00
parent 7d0e3c6f72
commit 839832f8d0
1 changed files with 5 additions and 6 deletions
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11
sys/dev/vinum/vinumio.c
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@ -33,7 +33,7 @@
* otherwise) arising in any way out of the use of this software, even if
* advised of the possibility of such damage.
*
* $Id: vinumio.c,v 1.29 1999/06/24 08:55:02 grog Exp $
* $Id: vinumio.c,v 1.24 1999/03/23 02:00:52 grog Exp grog $
*/
#include <dev/vinum/vinumhdr.h>
@ -193,11 +193,10 @@ init_drive(struct drive *drive, int verbose)
void
close_drive(struct drive *drive)
{
if (drive->vp) {
LOCKDRIVE(drive); /* keep the daemon out */
LOCKDRIVE(drive); /* keep the daemon out */
if (drive->vp)
close_locked_drive(drive); /* and close it */
unlockdrive(drive);
}
unlockdrive(drive);
}
/*
@ -272,7 +271,7 @@ driveio(struct drive *drive, char *buf, size_t length, off_t offset, int flag)
int len = min(length, MAXBSIZE); /* maximum block device transfer is MAXBSIZE */
bp = geteblk(len); /* get a buffer header */
bp->b_flags = flag; /* get locked */
bp->b_flags = flag;
bp->b_dev = drive->vp->v_un.vu_specinfo->si_rdev; /* device */
bp->b_blkno = offset / drive->partinfo.disklab->d_secsize; /* block number */
bp->b_data = buf;