tree d745d1eb415f1dff77c0de54b5a63a4494ba3f76
parent 28c1b9fdf4562b52fe104384b16238c39c8a8d40
author Song Liu <songliubraving@fb.com> 1439501514 -0700
committer NeilBrown <neilb@suse.com> 1445667378 +1100

MD: replace special disk roles with macros

Add the following two macros for special roles: spare and faulty

MD_DISK_ROLE_SPARE	0xffff
MD_DISK_ROLE_FAULTY	0xfffe

Add MD_DISK_ROLE_MAX	0xff00 as the maximal possible regular role,
and minimal value of special role.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>