md: move LEVEL_* definition from md_k.h to md_u.h

.. as they are part of the user-space interface.
Also move MdpMinorShift into there so we can remove duplication.

Lastly move mdp_major in.  It is less obviously part of the user-space
interface, but do_mounts_md.c uses it, and it is acting a bit like
user-space.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/raid/md_u.h b/include/linux/raid/md_u.h
index 7192035fc4b0..2f824aa889f3 100644
--- a/include/linux/raid/md_u.h
+++ b/include/linux/raid/md_u.h
@@ -46,6 +46,12 @@
 #define STOP_ARRAY_RO           _IO (MD_MAJOR, 0x33)
 #define RESTART_ARRAY_RW        _IO (MD_MAJOR, 0x34)
 
+/* 63 partitions with the alternate major number (mdp) */
+#define MdpMinorShift 6
+#ifdef __KERNEL__
+extern int mdp_major;
+#endif
+
 typedef struct mdu_version_s {
         int major;
         int minor;
@@ -85,6 +91,17 @@ typedef struct mdu_array_info_s {
 
 } mdu_array_info_t;
 
+/* non-obvious values for 'level' */
+#define LEVEL_MULTIPATH         (-4)
+#define LEVEL_LINEAR            (-1)
+#define LEVEL_FAULTY            (-5)
+
+/* we need a value for 'no level specified' and 0
+ * means 'raid0', so we need something else.  This is
+ * for internal use only
+ */
+#define LEVEL_NONE              (-1000000)
+
 typedef struct mdu_disk_info_s {
         /*
          * configuration/status of one particular disk