Adds tests to mkfs-tests/036-rootdir-subvol for the modifiers to
mkfs.btrfs --subvol: ro, rw, default, and default-ro.
Signed-off-by: Mark Harmstone <maharmstone@fb.com>
This introduces two new cases:
- 3 hardlinks without any subvolume
This should results 3 hard links inside the btrfs.
- 3 hardlinks, but a subvolume will split 2 of them
Then the 2 inside the same subvolume should still report 2 nlinks,
but the lone one inside the new subvolume can only report 1 nlink.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Add a new option --subvol, which tells mkfs.btrfs to create the
specified directories as subvolumes when used with --rootdir.
Given a populated directory dir, the command
$ mkfs.btrfs --rootdir dir --subvol usr --subvol home --subvol home/username img
will create subvolumes 'usr' and 'home' within the toplevel subvolume,
and subvolume 'username' within the 'home' subvolume. It will fail if
any of the directories do not yet exist.
Pull-request: #868
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Mark Harmstone <maharmstone@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
