libceph: add ceph_osd_state_name()

Add the definition of ceph_osd_state_name(), to match its
counterpart in user space.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

include/linux/ceph/rados.h

@@ -150,6 +150,8 @@ struct ceph_eversion {
 #define CEPH_OSD_AUTOOUT (1<<2)  /* osd was automatically marked out */
 #define CEPH_OSD_NEW     (1<<3)  /* osd is new, never marked in */
 
+extern const char *ceph_osd_state_name(int s);
+
 /* osd weights.  fixed point value: 0x10000 == 1.0 ("in"), 0 == "out" */
 #define CEPH_OSD_IN  0x10000
 #define CEPH_OSD_OUT 0

net/ceph/ceph_strings.c

@@ -68,6 +68,21 @@ const char *ceph_osd_op_name(int op)
 	return "???";
 }
 
+const char *ceph_osd_state_name(int s)
+{
+	switch (s) {
+	case CEPH_OSD_EXISTS:
+		return "exists";
+	case CEPH_OSD_UP:
+		return "up";
+	case CEPH_OSD_AUTOOUT:
+		return "autoout";
+	case CEPH_OSD_NEW:
+		return "new";
+	default:
+		return "???";
+	}
+}
 
 const char *ceph_pool_op_name(int op)
 {