From patchwork Tue Mar 6 23:58:18 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [09/54] mke2fs: Allow metadata checksums to be turned on at mkfs time Date: Tue, 06 Mar 2012 13:58:18 -0000 From: "Darrick J. Wong" X-Patchwork-Id: 145068 Message-Id: <20120306235818.11945.39199.stgit@elm3b70.beaverton.ibm.com> To: Andreas Dilger , Theodore Tso , "Darrick J. Wong" Cc: Sunil Mushran , Amir Goldstein , Andi Kleen , Mingming Cao , Joel Becker , linux-ext4@vger.kernel.org, Coly Li Write out reserved inodes with full checksums when writing out a zeroed table. Signed-off-by: Darrick J. Wong --- misc/mke2fs.c | 29 ++++++++++++++++++++++++++++- 1 files changed, 28 insertions(+), 1 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/misc/mke2fs.c b/misc/mke2fs.c index d80c0b2..28485e3 100644 --- a/misc/mke2fs.c +++ b/misc/mke2fs.c @@ -306,6 +306,27 @@ _("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; @@ -351,6 +372,12 @@ 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) @@ -870,7 +897,7 @@ static __u32 ok_features[3] = { #ifdef CONFIG_QUOTA EXT4_FEATURE_RO_COMPAT_QUOTA| #endif - 0 + EXT4_FEATURE_RO_COMPAT_METADATA_CSUM };