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MFC: Sync with HEAD.

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This commit is contained in:
pjd 2006-01-17 11:49:09 +00:00
parent 652705ad2e
commit d16c8aabc8
1 changed files with 10 additions and 6 deletions
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16
sys/geom/zero/g_zero.c
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@ -22,10 +22,11 @@
* 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/kernel.h>
@ -42,9 +43,12 @@
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, zero, CTLFLAG_RW, 0, "GEOM_ZERO stuff");
static u_int g_zero_clear = 1;
SYSCTL_UINT(_kern_geom_zero, OID_AUTO, clear, CTLFLAG_RW, &g_zero_clear, 0,
"Zero-fill bio_data.");
static int g_zero_clear = 1;
SYSCTL_INT(_kern_geom_zero, OID_AUTO, clear, CTLFLAG_RW, &g_zero_clear, 0,
"Clear read data buffer");
static int g_zero_byte = 0;
SYSCTL_INT(_kern_geom_zero, OID_AUTO, byte, CTLFLAG_RW, &g_zero_byte, 0,
"Byte (octet) value to clear the buffers with");
static void
g_zero_start(struct bio *bp)
@ -54,7 +58,7 @@ g_zero_start(struct bio *bp)
switch (bp->bio_cmd) {
case BIO_READ:
if (g_zero_clear)
bzero(bp->bio_data, bp->bio_length);
memset(bp->bio_data, g_zero_byte, bp->bio_length);
/* FALLTHROUGH */
case BIO_DELETE:
case BIO_WRITE: