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xfs: don't allow realtime swap files

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Linux swapfiles use bmap which has no ability to tell the swap code
that the blocks its reporting aren't actually on the data device.
Therefore, swapon on a realtime file could corrupt random blocks on
the data device, so we must ensure that swapon cannot happen.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Darrick J. Wong
2017-06-19 13:24:02 -07:00
committed by Eryu Guan
parent 10ad750169
commit 6813e5213d
3 changed files with 80 additions and 0 deletions
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tests/xfs/group
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@@ -416,3 +416,4 @@
416 dangerous_fuzzers dangerous_scrub dangerous_repair
417 dangerous_fuzzers dangerous_scrub dangerous_online_repair
418 dangerous_fuzzers dangerous_scrub dangerous_repair
419 auto quick