libceph: handle new osdmap down/state change encoding

Old incrementals encode a 0 value (nearly always) when an osd goes down.
Change that to allow any state bit(s) to be flipped.  Special case 0 to
mean flip the CEPH_OSD_UP bit to mimic the old behavior.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 94f068dda433..e97c3588c3ec 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -830,15 +830,20 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                 map->osd_addr[osd] = addr;
         }
 
-        /* new_down */
+        /* new_state */
         ceph_decode_32_safe(p, end, len, bad);
         while (len--) {
                 u32 osd;
+                u8 xorstate;
                 ceph_decode_32_safe(p, end, osd, bad);
+                xorstate = **(u8 **)p;
                 (*p)++;  /* clean flag */
-                pr_info("osd%d down\n", osd);
+                if (xorstate == 0)
+                        xorstate = CEPH_OSD_UP;
+                if (xorstate & CEPH_OSD_UP)
+                        pr_info("osd%d down\n", osd);
                 if (osd < map->max_osd)
-                        map->osd_state[osd] &= ~CEPH_OSD_UP;
+                        map->osd_state[osd] ^= xorstate;
         }
 
         /* new_weight */