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author | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 07:17:34 -0500 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-14 08:07:28 -0800 |
commit | 063875158fa59b569ba26b9b259e822b5b51657e (patch) | |
tree | 4b05b48e3c7d496e9b5a394d078569e789bc2f10 /fs/omfs | |
parent | 97a9a2516af7df77a961e36466be866f7facfec3 (diff) |
ext4: make sure directory and symlink blocks are revoked
(cherry picked from commit 50689696867d95b38d9c7be640a311494a04fb86)
When an inode gets unlinked, the functions ext4_clear_blocks() and
ext4_remove_blocks() call ext4_forget() for all the buffer heads
corresponding to the deleted inode's data blocks. If the inode is a
directory or a symlink, the is_metadata parameter must be non-zero so
ext4_forget() will revoke them via jbd2_journal_revoke(). Otherwise,
if these blocks are reused for a data file, and the system crashes
before a journal checkpoint, the journal replay could end up
corrupting these data blocks.
Thanks to Curt Wohlgemuth for pointing out potential problems in this
area.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/omfs')
0 files changed, 0 insertions, 0 deletions