[PATCH 08/47] mke2fs: Allow metadata checksums to be turned on at mkfs time

["Darrick J. Wong" <djwong@us.ibm.com>]

Write out checksummed inodes even when writing out a zeroed table.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
---
 misc/mke2fs.c |   30 +++++++++++++++++++++++++++++-
 1 files changed, 29 insertions(+), 1 deletions(-)


diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 244e0c8..6e9f399 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -304,6 +304,27 @@ _("Warning: the backup superblock/group descriptors at block %u contain\n"
 	ext2fs_badblocks_list_iterate_end(bb_iter);
 }
 
+static void write_reserved_inodes(ext2_filsys fs)
+{
+	errcode_t	retval;
+	ext2_ino_t	ino;
+	struct ext2_inode *inode;
+
+	retval = ext2fs_get_mem(EXT2_INODE_SIZE(fs->super), &inode);
+	if (retval) {
+		com_err("inode_init", retval,
+			"while allocating memory");
+		exit(1);
+	}
+	bzero(inode, EXT2_INODE_SIZE(fs->super));
+
+	for (ino = 1; ino < EXT2_FIRST_INO(fs->super); ino++)
+		ext2fs_write_inode_full(fs, ino, inode,
+					EXT2_INODE_SIZE(fs->super));
+
+	ext2fs_free_mem(&inode);
+}
+
 static void write_inode_tables(ext2_filsys fs, int lazy_flag, int itable_zeroed)
 {
 	errcode_t	retval;
@@ -349,6 +370,12 @@ static void write_inode_tables(ext2_filsys fs, int lazy_flag, int itable_zeroed)
 	ext2fs_zero_blocks2(0, 0, 0, 0, 0);
 	ext2fs_numeric_progress_close(fs, &progress,
 				      _("done                            \n"));
+
+	/* Reserved inodes must always have correct checksums */
+	if (fs->super->s_creator_os == EXT2_OS_LINUX &&
+	    fs->super->s_feature_ro_compat &
+	    EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
+		write_reserved_inodes(fs);
 }
 
 static void create_root_dir(ext2_filsys fs)
@@ -847,7 +874,8 @@ static __u32 ok_features[3] = {
 		EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|
 		EXT4_FEATURE_RO_COMPAT_GDT_CSUM|
 		EXT4_FEATURE_RO_COMPAT_BIGALLOC|
-		EXT4_FEATURE_RO_COMPAT_QUOTA
+		EXT4_FEATURE_RO_COMPAT_QUOTA|
+		EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
 };