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Filipe Manana
91540ef980
Test that deduplication of an entire file that has a size that is not
aligned to the filesystem's block size into the middle of a different
file does not corrupt the destination's file data by reflinking the last
(eof) block.
This test is motivated by a bug recently found that affects both Btrfs
and XFS, and is fixed by the following commits/patches for the linux
kernel:
07d19dc9fbe9 ("vfs: avoid problematic remapping requests into partial EOF block")
dceeb47b0ed6 ("xfs: fix data corruption w/ unaligned dedupe ranges")
de02b9f6bb65 ("Btrfs: fix data corruption when deduplicating between different files")
Btrfs: fix infinite loop on inode eviction after deduplication of eof block
The VFS patch was added to kernel 4.20-rc1 and the XFS and first Btrfs
patches were added to kernel 4.19. The second patch for Btrfs is very
recent and it is not yet in Linus' tree.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
46 lines
1.6 KiB
Plaintext
46 lines
1.6 KiB
Plaintext
QA output created by 517
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wrote 2518890/2518890 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 102398/102398 bytes at offset 2518890
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 557771/557771 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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File content before first deduplication:
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0000000 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
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*
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11467540 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ae ae ae ae ae ae
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11467560 ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae
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*
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11777540 ae ae ae ae ae ae ae ae
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11777550
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deduped 557771/557771 bytes at offset 1957888
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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File content after first deduplication and before unmounting:
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0000000 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
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*
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2518880 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ae ae ae ae ae ae
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2518896 ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae
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*
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2621280 ae ae ae ae ae ae ae ae
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2621288
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File content after first unmount:
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0000000 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
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*
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2518880 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ae ae ae ae ae ae
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2518896 ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae
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*
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2621280 ae ae ae ae ae ae ae ae
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2621288
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wrote 100/100 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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deduped 100/100 bytes at offset 2519040
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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File content after second deduplication:
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0000000 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
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*
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2518880 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b ae ae ae ae ae ae
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2518896 ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae ae
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*
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2621280 ae ae ae ae ae ae ae ae
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2621288
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