ext4: add self-testing infrastructure to do a sanity check

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This commit adds a self-testing infrastructure like extent tree does to
do a sanity check for extent status tree.  After status tree is as a
extent cache, we'd better to make sure that it caches right result.

After applied this commit, we will get a lot of messages when we run
xfstests as below.

...
kernel: ES len assertation failed for inode: 230 retval 1 != map->m_len
3 in ext4_map_blocks (allocation)
...
kernel: ES cache assertation failed for inode: 230 es_cached ex
[974/2/4781/20] != found ex [974/1/4781/1000]
...
kernel: ES insert assertation failed for inode: 635 ex_status
[0/45/21388/w] != es_status [44/1/21432/u]
...

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

...

This commit is contained in:

Dmitry Monakhov 2013-03-10 21:01:03 -04:00 • committed by Theodore Ts'o

parent bd384364c1

commit 921f266bc6

3 changed files with 277 additions and 0 deletions

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175

fs/ext4/extents_status.c

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6

fs/ext4/extents_status.h

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96

fs/ext4/inode.c

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