ext4: don't increase iversion counter for ea_inodes

ea_inodes are using i_version for storing part of the reference count so
we really need to leave it alone.

The problem can be reproduced by xfstest ext4/026 when iversion is
enabled. Fix it by not calling inode_inc_iversion() for EXT4_EA_INODE_FL
inodes in ext4_mark_iloc_dirty().

Cc: stable@kernel.org
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Link: https://lore.kernel.org/r/20220824160349.39664-1-lczerner@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 6012144..2a220be 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5731,7 +5731,12 @@ int ext4_mark_iloc_dirty(handle_t *handle,
        }
        ext4_fc_track_inode(handle, inode);
 
-       if (IS_I_VERSION(inode))
+       /*
+        * ea_inodes are using i_version for storing reference count, don't
+        * mess with it
+        */
+       if (IS_I_VERSION(inode) &&
+           !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL))
                inode_inc_iversion(inode);
 
        /* the do_update_inode consumes one bh->b_count */