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| author | Darrick J. Wong <djwong@us.ibm.com> | 2012-04-30 02:29:10 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-04-30 02:29:10 +0400 |
| commit | a9c4731780544d52b243bf46e4dd635c67fa9f84 (patch) | |
| tree | dc735f2f59fa2107e8fed8e3d26f259557e34008 /fs/ext4/resize.c | |
| parent | 0441984a3398970ab4820410b9cf4ff85bf3a6b0 (diff) | |
| download | linux-a9c4731780544d52b243bf46e4dd635c67fa9f84.tar.xz | |
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>
Diffstat (limited to 'fs/ext4/resize.c')
| -rw-r--r-- | fs/ext4/resize.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 59fa0be27251..e0374757a94b 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -796,7 +796,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, ext4_kvfree(o_group_desc); le16_add_cpu(&es->s_reserved_gdt_blocks, -1); - err = ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh); + err = ext4_handle_dirty_super_now(handle, sb); if (err) ext4_std_error(sb, err); @@ -968,6 +968,8 @@ static void update_backups(struct super_block *sb, goto exit_err; } + ext4_superblock_csum_set(sb, (struct ext4_super_block *)data); + while ((group = ext4_list_backups(sb, &three, &five, &seven)) < last) { struct buffer_head *bh; |