From: Dave Chinner <david@fromorbit.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 15/25] xfs: scrub refcount btrees
Date: Thu, 5 Oct 2017 13:59:37 +1100 [thread overview]
Message-ID: <20171005025937.GL3666@dastard> (raw)
In-Reply-To: <150706334388.19351.17983785124391880595.stgit@magnolia>
On Tue, Oct 03, 2017 at 01:42:23PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> +/* Scrub a refcountbt record. */
> +STATIC int
> +xfs_scrub_refcountbt_helper(
> + struct xfs_scrub_btree *bs,
> + union xfs_btree_rec *rec)
> +{
> + struct xfs_mount *mp = bs->cur->bc_mp;
> + struct xfs_agf *agf;
> + struct xfs_refcount_irec irec;
> + unsigned long long rec_end;
> + xfs_agblock_t eoag;
> + bool has_cowflag;
> + int error = 0;
> +
> + irec.rc_startblock = be32_to_cpu(rec->refc.rc_startblock);
> + irec.rc_blockcount = be32_to_cpu(rec->refc.rc_blockcount);
> + irec.rc_refcount = be32_to_cpu(rec->refc.rc_refcount);
> + agf = XFS_BUF_TO_AGF(bs->sc->sa.agf_bp);
> + eoag = be32_to_cpu(agf->agf_length);
> +
> + /* Only CoW records can have refcount == 1. */
> + has_cowflag = !!(irec.rc_startblock & XFS_REFC_COW_START);
> + if ((irec.rc_refcount == 1 && !has_cowflag) ||
> + (irec.rc_refcount != 1 && has_cowflag))
> + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0);
> +
> + /* Check the extent. */
> + irec.rc_startblock &= ~XFS_REFC_COW_START;
> + rec_end = (unsigned long long)irec.rc_startblock + irec.rc_blockcount;
> + if (irec.rc_startblock >= mp->m_sb.sb_agblocks ||
> + irec.rc_startblock >= eoag ||
> + irec.rc_blockcount == 0 ||
> + rec_end > mp->m_sb.sb_agblocks ||
> + rec_end > eoag ||
For the (broken) record...
> + irec.rc_refcount < 1)
Unsigned variable, so it seems to me that irec.rc_refcount == 0
would be a more correct check.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2017-10-05 2:59 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-03 20:40 [PATCH v11 00/25] xfs: online scrub support Darrick J. Wong
2017-10-03 20:40 ` [PATCH 01/25] xfs: create an ioctl to scrub AG metadata Darrick J. Wong
2017-10-03 20:41 ` [PATCH 02/25] xfs: dispatch metadata scrub subcommands Darrick J. Wong
2017-10-03 20:41 ` [PATCH 03/25] xfs: probe the scrub ioctl Darrick J. Wong
2017-10-03 23:32 ` Dave Chinner
2017-10-04 0:02 ` Darrick J. Wong
2017-10-04 1:56 ` Dave Chinner
2017-10-04 3:14 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 04/25] xfs: create helpers to record and deal with scrub problems Darrick J. Wong
2017-10-03 23:44 ` Dave Chinner
2017-10-04 0:56 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 05/25] xfs: create helpers to scrub a metadata btree Darrick J. Wong
2017-10-03 23:49 ` Dave Chinner
2017-10-04 0:13 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 06/25] xfs: scrub the shape of " Darrick J. Wong
2017-10-04 0:15 ` Dave Chinner
2017-10-04 3:51 ` Darrick J. Wong
2017-10-04 5:48 ` Dave Chinner
2017-10-04 17:48 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 07/25] xfs: scrub btree keys and records Darrick J. Wong
2017-10-04 20:52 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 08/25] xfs: create helpers to scan an allocation group Darrick J. Wong
2017-10-04 0:46 ` Dave Chinner
2017-10-04 3:58 ` Darrick J. Wong
2017-10-04 5:59 ` Dave Chinner
2017-10-04 17:51 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 09/25] xfs: scrub the backup superblocks Darrick J. Wong
2017-10-04 0:57 ` Dave Chinner
2017-10-04 4:06 ` Darrick J. Wong
2017-10-04 6:13 ` Dave Chinner
2017-10-04 17:56 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 10/25] xfs: scrub AGF and AGFL Darrick J. Wong
2017-10-04 1:31 ` Dave Chinner
2017-10-04 4:21 ` Darrick J. Wong
2017-10-04 6:28 ` Dave Chinner
2017-10-04 17:57 ` Darrick J. Wong
2017-10-03 20:41 ` [PATCH 11/25] xfs: scrub the AGI Darrick J. Wong
2017-10-04 1:43 ` Dave Chinner
2017-10-04 4:25 ` Darrick J. Wong
2017-10-04 6:43 ` Dave Chinner
2017-10-04 18:02 ` Darrick J. Wong
2017-10-04 22:16 ` Dave Chinner
2017-10-04 23:12 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 12/25] xfs: scrub free space btrees Darrick J. Wong
2017-10-05 0:59 ` Dave Chinner
2017-10-05 1:13 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 13/25] xfs: scrub inode btrees Darrick J. Wong
2017-10-05 2:08 ` Dave Chinner
2017-10-05 5:47 ` Darrick J. Wong
2017-10-05 7:22 ` Dave Chinner
2017-10-05 18:26 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 14/25] xfs: scrub rmap btrees Darrick J. Wong
2017-10-05 2:56 ` Dave Chinner
2017-10-05 5:02 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 15/25] xfs: scrub refcount btrees Darrick J. Wong
2017-10-05 2:59 ` Dave Chinner [this message]
2017-10-05 5:02 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 16/25] xfs: scrub inodes Darrick J. Wong
2017-10-05 4:04 ` Dave Chinner
2017-10-05 5:22 ` Darrick J. Wong
2017-10-05 7:13 ` Dave Chinner
2017-10-05 19:56 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 17/25] xfs: scrub inode block mappings Darrick J. Wong
2017-10-06 2:51 ` Dave Chinner
2017-10-06 17:00 ` Darrick J. Wong
2017-10-07 23:10 ` Dave Chinner
2017-10-08 3:54 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 18/25] xfs: scrub directory/attribute btrees Darrick J. Wong
2017-10-06 5:07 ` Dave Chinner
2017-10-06 18:30 ` Darrick J. Wong
2017-10-03 20:42 ` [PATCH 19/25] xfs: scrub directory metadata Darrick J. Wong
2017-10-06 7:07 ` Dave Chinner
2017-10-06 19:45 ` Darrick J. Wong
2017-10-06 22:16 ` Dave Chinner
2017-10-03 20:42 ` [PATCH 20/25] xfs: scrub directory freespace Darrick J. Wong
2017-10-09 1:44 ` Dave Chinner
2017-10-09 22:54 ` Darrick J. Wong
2017-10-03 20:43 ` [PATCH 21/25] xfs: scrub extended attributes Darrick J. Wong
2017-10-09 2:13 ` Dave Chinner
2017-10-09 21:14 ` Darrick J. Wong
2017-10-03 20:43 ` [PATCH 22/25] xfs: scrub symbolic links Darrick J. Wong
2017-10-09 2:17 ` Dave Chinner
2017-10-03 20:43 ` [PATCH 23/25] xfs: scrub parent pointers Darrick J. Wong
2017-10-03 20:43 ` [PATCH 24/25] xfs: scrub realtime bitmap/summary Darrick J. Wong
2017-10-09 2:28 ` Dave Chinner
2017-10-09 20:24 ` Darrick J. Wong
2017-10-03 20:43 ` [PATCH 25/25] xfs: scrub quota information Darrick J. Wong
2017-10-09 2:51 ` Dave Chinner
2017-10-09 20:03 ` Darrick J. Wong
2017-10-09 22:17 ` Dave Chinner
2017-10-09 23:08 ` Darrick J. Wong
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