[ 124/184] ext4: online defrag is not supported for journaled

From: Willy Tarreau
Date: Tue Jun 04 2013 - 18:45:19 EST

2.6.32-longterm review patch. If anyone has any objections, please let me know.


From: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>

commit f066055a3449f0e5b0ae4f3ceab4445bead47638 upstream.

Proper block swap for inodes with full journaling enabled is
truly non obvious task. In order to be on a safe side let's
explicitly disable it for now.

Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
fs/ext4/move_extent.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index fe81390..da25617 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -1208,7 +1208,12 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp,
orig_inode->i_ino, donor_inode->i_ino);
return -EINVAL;
+ /* TODO: This is non obvious task to swap blocks for inodes with full
+ jornaling enabled */
+ if (ext4_should_journal_data(orig_inode) ||
+ ext4_should_journal_data(donor_inode)) {
+ return -EINVAL;
+ }
/* Protect orig and donor inodes against a truncate */
ret1 = mext_inode_double_lock(orig_inode, donor_inode);
if (ret1 < 0)

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