On Tuesday 30 June 2020 9:12:09 PM IST Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
>
> While loading dquot records off disk, make sure that the quota type
> flags are the same between the incore dquot and the ondisk dquot.
>
The changes look good to me.
Reviewed-by: Chandan Babu R <chandanrlinux@xxxxxxxxx>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
> fs/xfs/xfs_dquot.c | 23 ++++++++++++++++++++---
> 1 file changed, 20 insertions(+), 3 deletions(-)
>
>
> diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
> index d5b7f03e93c8..46c8ca83c04d 100644
> --- a/fs/xfs/xfs_dquot.c
> +++ b/fs/xfs/xfs_dquot.c
> @@ -524,13 +524,27 @@ xfs_dquot_alloc(
> }
>
> /* Copy the in-core quota fields in from the on-disk buffer. */
> -STATIC void
> +STATIC int
> xfs_dquot_from_disk(
> struct xfs_dquot *dqp,
> struct xfs_buf *bp)
> {
> struct xfs_disk_dquot *ddqp = bp->b_addr + dqp->q_bufoffset;
>
> + /*
> + * The only field the verifier didn't check was the quota type flag, so
> + * do that here.
> + */
> + if ((dqp->dq_flags & XFS_DQ_ALLTYPES) !=
> + (ddqp->d_flags & XFS_DQ_ALLTYPES) ||
> + dqp->q_core.d_id != ddqp->d_id) {
> + xfs_alert(bp->b_mount,
> + "Metadata corruption detected at %pS, quota %u",
> + __this_address, be32_to_cpu(dqp->q_core.d_id));
> + xfs_alert(bp->b_mount, "Unmount and run xfs_repair");
> + return -EFSCORRUPTED;
> + }
> +
> /* copy everything from disk dquot to the incore dquot */
> memcpy(&dqp->q_core, ddqp, sizeof(struct xfs_disk_dquot));
>
> @@ -544,6 +558,7 @@ xfs_dquot_from_disk(
>
> /* initialize the dquot speculative prealloc thresholds */
> xfs_dquot_set_prealloc_limits(dqp);
> + return 0;
> }
>
> /* Allocate and initialize the dquot buffer for this in-core dquot. */
> @@ -617,9 +632,11 @@ xfs_qm_dqread(
> * further.
> */
> ASSERT(xfs_buf_islocked(bp));
> - xfs_dquot_from_disk(dqp, bp);
> -
> + error = xfs_dquot_from_disk(dqp, bp);
> xfs_buf_relse(bp);
> + if (error)
> + goto err;
> +
> *dqpp = dqp;
> return error;
>
>
>
--
chandan
