mkfs.cramfs mkfs.ext4 mkfs.minix mkfs.reiserfs
mkfs.bfs mkfs.ext2 mkfs.ext4dev mkfs.msdos mkfs.vfat
mkfs.btrfs mkfs.ext3 mkfs.jfs mkfs.ntfs mkfs.xfs
and for each of the above command line there is a fs utility that include it. Look into the source for good understanding. For ext2/ext3 fs, it is called e2fsprogs. So in Ubuntu (or Debian-based distro) u do a "apt-get source e2fsprogs" to get the source:
reading the source of mkfs's main() function:
u can see that after lots of code on setting structures in memory, it start by writing the inode table etc:
write_inode_tables(fs, lazy_itable_init, itable_zeroed);
create_root_dir(fs);
create_lost_and_found(fs);
reserve_inodes(fs);
create_bad_block_inode(fs, bb_list);
Following through the source code is much more understandable than going through output of "strace", which records all the interface with the kernel.
Follow through the following slide:
and forward a few slides and u will understand that mkfs is just making the header structures on the harddisk to contain the definition of the FS :
Similarly u can find many university courses on filesystem internal, eg:
Generally, real-life analysis of the harddisk/filesystem is done in forensic, so if u googling for fs forensics u can find lots of tools that walk the harddisk for the different components:
and this is forensics of ext4 filesystem:
Understanding "mkfs", is really as good as understanding FS internals.
On Fri, Jan 4, 2013 at 11:12 PM, KASHISH BHATIA <kashish.bhatia1989@xxxxxxxxx> wrote:
Hi,
I want to trace the overall flow of mkfs inside linux kernel. Specifically want to know which
kernel fs data structures are affected when we run "mkfs" ?
What all "mkfs" command writes on the block device when we run the command?
Are there any good documents which can explain the same?
--
Regards,Kashish Bhatia
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Regards,
Peter Teoh
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