[PATCH 5.19 127/717] ext4: dont increase iversion counter for ea_inodes

Greg Kroah-Hartman
2022-10-22T08:19:52Z

From: Lukas Czerner <lczerner@redhat.com>

commit 50f094a5580e6297bf10a807d16f0ee23fa576cf upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ext4/inode.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5731,7 +5731,12 @@ int ext4_mark_iloc_dirty(handle_t *handl
}
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 */