On Wed, Dec 13, 2017 at 03:58:19PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
>
> Create two helper functions to verify the headers of a long format
> btree block. We'll use this later for the realtime rmapbt.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
.....
> +bool
> +xfs_btree_lblock_verify(
> + struct xfs_buf *bp,
> + unsigned int max_recs)
> +{
> + struct xfs_mount *mp = bp->b_target->bt_mount;
> + struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
> +
> + /* numrecs verification */
> + if (be16_to_cpu(block->bb_numrecs) > max_recs)
> + return false;
> +
> + /* sibling pointer verification */
> + if (!block->bb_u.l.bb_leftsib ||
> + (block->bb_u.l.bb_leftsib != cpu_to_be64(NULLFSBLOCK) &&
> + !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_leftsib))))
> + return false;
> + if (!block->bb_u.l.bb_rightsib ||
> + (block->bb_u.l.bb_rightsib != cpu_to_be64(NULLFSBLOCK) &&
> + !XFS_FSB_SANITY_CHECK(mp, be64_to_cpu(block->bb_u.l.bb_rightsib))))
XFS_FSB_SANITY_CHECK() is the same thing as xfs_verify_fsbno(),
right? Perhaps they should be converted at the same time so we can
get rid of XFS_FSB_SANITY_CHECK()?
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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