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xfs: xfs_repair secondary sb verification regression test

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The secondary superblock verification in xfs_repair was subject to a bug
that unnecessarily leads to a brute force superblock scan if the last
superblock in the fs happens to be corrupt. Normally, xfs_repair handles
one-off superblock corruption gracefully using a heuristic that finds
the most consistent superblock content across the set of secondary
superblocks.

Create a regression test for xfs_repair that corrupts the last
superblock in the fs. Verify the superblock is updated from the
previously verified sb content and a brute force scan is not initiated.
In the event of failure, detect that a brute force scan has started and
abort the repair in order to fail the test quickly.

To support the test, extend the xfs_repair filter to handle corrupted
superblock repair output and provide generic test output for arbitrary
AG counts.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster
2015-02-12 14:12:14 +11:00
committed by Dave Chinner
parent 4046dd9fc6
commit ed48b428c6
4 changed files with 142 additions and 0 deletions
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common/repair
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@@ -88,6 +88,10 @@ s/(inode chunk) (\d+)\/(\d+)/AGNO\/INO/;
# sunit/swidth reset messages
s/^(Note - .*) were copied.*/\1 fields have been reset./;
s/^(Please) reset (with .*) if necessary/\1 set \2/;
# corrupt sb messages
s/(superblock) (\d+)/\1 AGNO/;
s/(AG \#)(\d+)/\1AGNO/;
s/(reset bad sb for ag) (\d+)/\1 AGNO/;
print;'
}