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Use abd_zero_off() where applicable

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In several places abd_zero() cleaned ABD filled at the next line.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #15514
This commit is contained in:
Alexander Motin 2023-11-17 16:28:32 -05:00 committed by GitHub
parent 92dc4ad83d
commit 22c8c33a58
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 7 additions and 4 deletions
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2
module/os/freebsd/zfs/vdev_label_os.c
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@ -55,8 +55,8 @@ vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size)
ASSERT3U(spa_config_held(spa, SCL_ALL, RW_WRITER), ==, SCL_ALL);
pad2 = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE);
abd_zero(pad2, VDEV_PAD_SIZE);
abd_copy_from_buf(pad2, buf, size);
abd_zero_off(pad2, size, VDEV_PAD_SIZE - size);
retry:
zio = zio_root(spa, NULL, NULL, flags);

3
module/zfs/mmp.c
View File

@ -517,8 +517,9 @@ mmp_write_uberblock(spa_t *spa)
zio_t *zio = zio_null(mmp->mmp_zio_root, spa, NULL, NULL, NULL, flags);
abd_t *ub_abd = abd_alloc_for_io(VDEV_UBERBLOCK_SIZE(vd), B_TRUE);
abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd));
abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));
abd_zero_off(ub_abd, sizeof (uberblock_t),
VDEV_UBERBLOCK_SIZE(vd) - sizeof (uberblock_t));
mmp->mmp_seq++;
mmp->mmp_kstat_id++;

6
module/zfs/vdev_label.c
View File

@ -1187,8 +1187,9 @@ vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
* Initialize uberblock template.
*/
ub_abd = abd_alloc_linear(VDEV_UBERBLOCK_RING, B_TRUE);
abd_zero(ub_abd, VDEV_UBERBLOCK_RING);
abd_copy_from_buf(ub_abd, &spa->spa_uberblock, sizeof (uberblock_t));
abd_zero_off(ub_abd, sizeof (uberblock_t),
VDEV_UBERBLOCK_RING - sizeof (uberblock_t));
ub = abd_to_buf(ub_abd);
ub->ub_txg = 0;
@ -1767,8 +1768,9 @@ vdev_uberblock_sync(zio_t *zio, uint64_t *good_writes,
/* Copy the uberblock_t into the ABD */
abd_t *ub_abd = abd_alloc_for_io(VDEV_UBERBLOCK_SIZE(vd), B_TRUE);
abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd));
abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t));
abd_zero_off(ub_abd, sizeof (uberblock_t),
VDEV_UBERBLOCK_SIZE(vd) - sizeof (uberblock_t));
for (int l = 0; l < VDEV_LABELS; l++)
vdev_label_write(zio, vd, l, ub_abd,