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| author | Zheng Liu | 2013-03-11 02:08:52 +0100 |
|---|---|---|
| committer | Theodore Ts'o | 2013-03-11 02:08:52 +0100 |
| commit | cdee78433c138c2f2018a6884673739af2634787 (patch) | |
| tree | 91ac86ddb480e0df9385917999645a8c0d35c68b /fs/ext4/extents_status.c | |
| parent | ext4: add self-testing infrastructure to do a sanity check (diff) | |
| download | kernel-qcow2-linux-cdee78433c138c2f2018a6884673739af2634787.tar.gz kernel-qcow2-linux-cdee78433c138c2f2018a6884673739af2634787.tar.xz kernel-qcow2-linux-cdee78433c138c2f2018a6884673739af2634787.zip | |
ext4: fix wrong m_len value after unwritten extent conversion
The ext4_ext_handle_uninitialized_extents() function was assuming the
return value of ext4_ext_map_blocks() is equal to map->m_len. This
incorrect assumption was harmless until we started use status tree as
a extent cache because we need to update status tree according to
'm_len' value.
Meanwhile this commit marks EXT4_MAP_MAPPED flag after unwritten extent
conversion. It shouldn't cause a bug because we update status tree
according to checking EXT4_MAP_UNWRITTEN flag. But it should be fixed.
After applied this commit, the following error message from self-testing
infrastructure disappears.
...
kernel: ES len assertation failed for inode: 230 retval 1 !=
map->m_len 3 in ext4_map_blocks (allocation)
...
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
Diffstat (limited to 'fs/ext4/extents_status.c')
0 files changed, 0 insertions, 0 deletions