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ext4: don't inherit inappropriate inode flags from parent

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At present INDEX and EXTENTS are the only flags that new ext4 inodes do
NOT inherit from their parent.  In addition prevent the flags DIRTY,
ECOMPR, IMAGIC, TOPDIR, HUGE_FILE and EXT_MIGRATE from being inherited. 
List inheritable flags explicitly to prevent future flags from
accidentally being inherited.

This fixes the TOPDIR flag inheritance bug reported at
http://bugzilla.kernel.org/show_bug.cgi?id=9866.

Signed-off-by: Duane Griffin <duaneg@dghda.com>
Acked-by: Andreas Dilger <adilger@sun.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Duane Griffin 2009-02-15 18:57:26 -05:00 • committed by Theodore Ts'o
parent 705895b611
commit 8fa43a81b9
2 changed files with 8 additions and 1 deletions
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2
fs/ext4/ialloc.c
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@ -889,7 +889,7 @@ got:
* newly created directory and file only if -o extent mount option is
* specified
*/
ei->i_flags = EXT4_I(dir)->i_flags & ~(EXT4_INDEX_FL|EXT4_EXTENTS_FL);
ei->i_flags = EXT4_I(dir)->i_flags & EXT4_FL_INHERITED;
if (S_ISLNK(mode))
ei->i_flags &= ~(EXT4_IMMUTABLE_FL|EXT4_APPEND_FL);
/* dirsync only applies to directories */