ext4: fix checks for orphan inodes

When orphan file feature is enabled, inode can be tracked as orphan
either in the standard orphan list or in the orphan file. The first can
be tested by checking ei->i_orphan list head, the second is recorded by
EXT4_STATE_ORPHAN_FILE inode state flag. There are several places where
we want to check whether inode is tracked as orphan and only some of
them properly check for both possibilities. Luckily the consequences are
mostly minor, the worst that can happen is that we track an inode as
orphan although we don't need to and e2fsck then complains (resulting in
occasional ext4/307 xfstest failures). Fix the problem by introducing a
helper for checking whether an inode is tracked as orphan and use it in
appropriate places.

Fixes: 4a79a98c7b19 ("ext4: Improve scalability of ext4 orphan file handling")
Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Message-ID: <20250925123038.20264-2-jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index a31cf47681b9..24c414605b08 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1996,6 +1996,16 @@ static inline bool ext4_verity_in_progress(struct inode *inode)
 #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
 
 /*
+ * Check whether the inode is tracked as orphan (either in orphan file or
+ * orphan list).
+ */
+static inline bool ext4_inode_orphan_tracked(struct inode *inode)
+{
+	return ext4_test_inode_state(inode, EXT4_STATE_ORPHAN_FILE) ||
+		!list_empty(&EXT4_I(inode)->i_orphan);
+}
+
+/*
  * Codes for operating systems
  */
 #define EXT4_OS_LINUX		0