diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2023-08-10 07:48:10 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2023-08-10 07:48:10 -0700 |
| commit | d728f4e3b21e74910e370b09bab54629eb66badb (patch) | |
| tree | 7f939a932324d6828908c3d2fc26cd2a1d9a52a7 /fs/xfs/scrub | |
| parent | d65eb8a63350d9344611567607d3b59dccb7e76e (diff) | |
xfs: allow the user to cancel repairs before we start writing
All online repair functions have the same structure: walk filesystem
metadata structures gathering enough data to rebuild the structure,
stage a new copy, and then commit the new copy.
The gathering steps do not write anything to disk, so they are peppered
with xchk_should_terminate calls to avoid softlockup warnings and to
provide an opportunity to abort the repair (by killing xfs_scrub).
However, it's not clear in the code base when is the last chance to
abort cleanly without having to undo a bunch of structure.
Therefore, add one more call to xchk_should_terminate (along with a
comment) providing the sysadmin with the ability to abort before it's
too late and to make it clear in the source code when it's no longer
convenient or safe to abort a repair. As there are only four repair
functions right now, this patch exists more to establish a precedent for
subsequent additions than to deliver practical functionality.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/scrub')
| -rw-r--r-- | fs/xfs/scrub/agheader_repair.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/xfs/scrub/agheader_repair.c b/fs/xfs/scrub/agheader_repair.c index 9e99486b5f20..3dda09b5ece5 100644 --- a/fs/xfs/scrub/agheader_repair.c +++ b/fs/xfs/scrub/agheader_repair.c @@ -49,6 +49,10 @@ xrep_superblock( if (error) return error; + /* Last chance to abort before we start committing fixes. */ + if (xchk_should_terminate(sc, &error)) + return error; + /* Copy AG 0's superblock to this one. */ xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); xfs_sb_to_disk(bp->b_addr, &mp->m_sb); @@ -424,6 +428,10 @@ xrep_agf( if (error) return error; + /* Last chance to abort before we start committing fixes. */ + if (xchk_should_terminate(sc, &error)) + return error; + /* Start rewriting the header and implant the btrees we found. */ xrep_agf_init_header(sc, agf_bp, &old_agf); xrep_agf_set_roots(sc, agf, fab); @@ -748,6 +756,10 @@ xrep_agfl( if (error) goto err; + /* Last chance to abort before we start committing fixes. */ + if (xchk_should_terminate(sc, &error)) + goto err; + /* * Update AGF and AGFL. We reset the global free block counter when * we adjust the AGF flcount (which can fail) so avoid updating any @@ -995,6 +1007,10 @@ xrep_agi( if (error) return error; + /* Last chance to abort before we start committing fixes. */ + if (xchk_should_terminate(sc, &error)) + return error; + /* Start rewriting the header and implant the btrees we found. */ xrep_agi_init_header(sc, agi_bp, &old_agi); xrep_agi_set_roots(sc, agi, fab); |