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generic: add test for fsync after creating hard link

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This test is motivated by an fsync issue discovered in btrfs.
The issue was that we could lose file data, that was previously
fsync'ed successfully, if we end up adding a hard link to our
inode and then persist the fsync log later via an fsync of other
inode for example.

The btrfs issue was fixed by the following linux kernel patch:

  Btrfs: fix fsync data loss after adding hard link to inode

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Filipe Manana
2015-02-16 10:13:27 +11:00
committed by Dave Chinner
parent dd8a4b3dfe
commit 5a3ce97e3e
3 changed files with 111 additions and 0 deletions
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tests/generic/056.out
+11
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@@ -0,0 +1,11 @@
QA output created by 056
wrote 4096/4096 bytes at offset 0
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
File content before:
0000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
*
0010000
File content after:
0000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
*
0010000