On 1/3/18 12:40 PM, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
>
> Teach xfs_check to record cow staging events correctly. This means that
> we strip off the high bit before using startblock.
>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
> db/check.c | 19 +++++++++++++++----
> 1 file changed, 15 insertions(+), 4 deletions(-)
>
>
> diff --git a/db/check.c b/db/check.c
> index 3afde02..2f8dee5 100644
> --- a/db/check.c
> +++ b/db/check.c
> @@ -4730,13 +4730,24 @@ scanfunc_refcnt(
> lastblock = 0;
> for (i = 0; i < be16_to_cpu(block->bb_numrecs); i++) {
> if (be32_to_cpu(rp[i].rc_refcount) == 1) {
> - dbprintf(_(
> - "leftover CoW extent (%u/%u) len %u\n"),
> + xfs_agblock_t agbno;
> + char *msg;
> +
> + agbno = be32_to_cpu(rp[i].rc_startblock);
> + if (agbno >= XFS_REFC_COW_START) {
> + agbno -= XFS_REFC_COW_START;
> + msg = _(
> + "leftover CoW extent (%u/%u) len %u\n");
> + } else {
> + msg = _(
> + "leftover CoW extent at unexpected address (%u/%u) len %u\n");
> + }
> + dbprintf(msg,
> seqno,
> - be32_to_cpu(rp[i].rc_startblock),
> + agbno,
> be32_to_cpu(rp[i].rc_blockcount));
> set_dbmap(seqno,
> - be32_to_cpu(rp[i].rc_startblock),
> + agbno,
> be32_to_cpu(rp[i].rc_blockcount),
> DBM_COWDATA, seqno, bno);
> } else {
>
> --
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