3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dmitry Monakhov <dmonak...@openvz.org>
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 <dmonak...@openvz.org>
Signed-off-by: "Theodore Ts'o" <ty...@mit.edu>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
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 df5cde5..e2016f3 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -1142,7 +1142,12 @@ 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 */
mext_inode_double_lock(orig_inode, donor_inode);
--
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