On Tue, Apr 11, 2017 at 10:45:27PM -0500, Eric Sandeen wrote:
> Allow write -d to write bad data and recalculate CRC
> for dqblks.
>
> Inspired-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
>
> diff --git a/db/io.c b/db/io.c
> index 67ed5f9..9918a51 100644
> --- a/db/io.c
> +++ b/db/io.c
> @@ -476,6 +476,17 @@ xfs_verify_recalc_inode_crc(
> }
>
> void
> +xfs_verify_recalc_dquot_crc(
> + struct xfs_buf *bp)
> +{
> + ASSERT((iocur_top->dquot_buf));
> + ASSERT(iocur_top->bp == bp);
> +
> + xfs_update_cksum(iocur_top->data, sizeof(struct xfs_dqblk),
> + XFS_DQUOT_CRC_OFF);
> +}
> +
> +void
> xfs_verify_recalc_crc(
> struct xfs_buf *bp)
> {
> diff --git a/db/io.h b/db/io.h
> index 12d96c2..b415b82 100644
> --- a/db/io.h
> +++ b/db/io.h
> @@ -65,6 +65,7 @@ extern void ring_add(void);
> extern void set_iocur_type(const struct typ *t);
> extern void xfs_dummy_verify(struct xfs_buf *bp);
> extern void xfs_verify_recalc_inode_crc(struct xfs_buf *bp);
> +extern void xfs_verify_recalc_dquot_crc(struct xfs_buf *bp);
> extern void xfs_verify_recalc_crc(struct xfs_buf *bp);
>
> /*
> diff --git a/db/write.c b/db/write.c
> index 70c9865..d24ea05 100644
> --- a/db/write.c
> +++ b/db/write.c
> @@ -139,7 +139,8 @@ write_f(
>
> if (invalid_data &&
> iocur_top->typ->crc_off == TYP_F_NO_CRC_OFF &&
> - !iocur_top->ino_buf) {
> + !iocur_top->ino_buf &&
> + !iocur_top->dquot_buf) {
> dbprintf(_("Cannot recalculate CRCs on this type of object\n"));
> return 0;
> }
> @@ -169,6 +170,9 @@ write_f(
> } else if (iocur_top->ino_buf) {
> local_ops.verify_write = xfs_verify_recalc_inode_crc;
> dbprintf(_("Allowing write of corrupted inode with good CRC\n"));
> + } else if (iocur_top->dquot_buf) {
> + local_ops.verify_write = xfs_verify_recalc_dquot_crc;
> + dbprintf(_("Allowing write of corrupted dquot with good CRC\n"));
> } else { /* invalid data */
> local_ops.verify_write = xfs_verify_recalc_crc;
> dbprintf(_("Allowing write of corrupted data with good CRC\n"));
>
> --
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