From: Jan Kara jack@suse.cz
stable inclusion from linux-4.19.160 commit f2a32b26684550173f9fdd326923c0799b552916
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commit f902b216501094495ff75834035656e8119c537f upstream.
The idea of the warning in ext4_update_dx_flag() is that we should warn when we are clearing EXT4_INODE_INDEX on a filesystem with metadata checksums enabled since after clearing the flag, checksums for internal htree nodes will become invalid. So there's no need to warn (or actually do anything) when EXT4_INODE_INDEX is not set.
Link: https://lore.kernel.org/r/20201118153032.17281-1-jack@suse.cz Fixes: 48a34311953d ("ext4: fix checksum errors with indexed dirs") Reported-by: Eric Biggers ebiggers@kernel.org Reviewed-by: Eric Biggers ebiggers@google.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Cheng Jian cj.chengjian@huawei.com --- fs/ext4/ext4.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 03cf8faf51b9..b2e876bf0dec 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2410,7 +2410,8 @@ void ext4_insert_dentry(struct inode *inode, struct ext4_filename *fname); static inline void ext4_update_dx_flag(struct inode *inode) { - if (!ext4_has_feature_dir_index(inode->i_sb)) { + if (!ext4_has_feature_dir_index(inode->i_sb) && + ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { /* ext4_iget() should have caught this... */ WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb)); ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);