ext4: calculate and verify superblock checksum
Calculate and verify the superblock checksum. Since the UUID and
block group number are embedded in each copy of the superblock, we
need only checksum the entire block. Refactor some of the code to
eliminate open-coding of the checksum update call.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index b58bd5c..6251251 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2021,7 +2021,7 @@
/* Insert this inode at the head of the on-disk orphan list... */
NEXT_ORPHAN(inode) = le32_to_cpu(EXT4_SB(sb)->s_es->s_last_orphan);
EXT4_SB(sb)->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
- err = ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh);
+ err = ext4_handle_dirty_super_now(handle, sb);
rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
if (!err)
err = rc;
@@ -2094,7 +2094,7 @@
if (err)
goto out_brelse;
sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
- err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
+ err = ext4_handle_dirty_super_now(handle, inode->i_sb);
} else {
struct ext4_iloc iloc2;
struct inode *i_prev =