On Wed, Nov 18, 2009 at 04:26:10PM +0900, Akira Fujita wrote: > ext4: initialize moved_len before calling ext4_move_extents() > > From: Kazuya Mio <k-mio@xxxxxxxxxxxxx> > > moved_len of struct move_extent is used to notify > exchanged blocks count to the user space. > So at the beginning of the EXT4_IOC_MOVE_EXT, > moved_len should be always zero. > Without this patch, if wrong moved_len is passed from the user space, > EXT4_IOC_MOVE_EXT will return wrong blocks count. Applied with the following rewording of the patch description: ext4: initialize moved_len before calling ext4_move_extents() From: Kazuya Mio <k-mio@xxxxxxxxxxxxx> The move_extent.moved_len is used to pass back the number of exchanged blocks count to user space. Currently the caller must clear this field; but we spend more code space checking for this requirement than simply zeroing the field ourselves, so let's just make life easier for everyone all around. Signed-off-by: Kazuya Mio <k-mio@xxxxxxxxxxxxx> Signed-off-by: Akira Fujita <a-fujita@xxxxxxxxxxxxx> Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx> - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
