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xfs: fix the calculation for "end" and "length"

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The value of "end" should be "start + length - 1".

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Shiyang Ruan 2023-06-29 17:40:30 -07:00 committed by Darrick J. Wong
parent 75dc034531
commit 5cf32f63b0
1 changed files with 5 additions and 4 deletions
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9
fs/xfs/xfs_notify_failure.c
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@ -114,7 +114,8 @@ xfs_dax_notify_ddev_failure(
int error = 0;
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, daddr);
xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno);
xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen);
xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp,
daddr + bblen - 1);
xfs_agnumber_t end_agno = XFS_FSB_TO_AGNO(mp, end_fsbno);
error = xfs_trans_alloc_empty(mp, &tp);
@ -210,7 +211,7 @@ xfs_dax_notify_failure(
ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1;
/* Ignore the range out of filesystem area */
if (offset + len < ddev_start)
if (offset + len - 1 < ddev_start)
return -ENXIO;
if (offset > ddev_end)
return -ENXIO;
@ -222,8 +223,8 @@ xfs_dax_notify_failure(
len -= ddev_start - offset;
offset = 0;
}
if (offset + len > ddev_end)
len -= ddev_end - offset;
if (offset + len - 1 > ddev_end)
len = ddev_end - offset + 1;
return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len),
mf_flags);