libceph: primary_affinity decode bits

Add two helpers to decode primary_affinity (full map, vector<u32>) and
new_primary_affinity (inc map, map<u32, u32>) and switch to them.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 0ac1293..9568e62 100644 (file)
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -959,6 +959,60 @@ static int set_primary_affinity(struct ceph_osdmap *map, int osd, u32 aff)
        return 0;
 }
 
+static int decode_primary_affinity(void **p, void *end,
+                                  struct ceph_osdmap *map)
+{
+       u32 len, i;
+
+       ceph_decode_32_safe(p, end, len, e_inval);
+       if (len == 0) {
+               kfree(map->osd_primary_affinity);
+               map->osd_primary_affinity = NULL;
+               return 0;
+       }
+       if (len != map->max_osd)
+               goto e_inval;
+
+       ceph_decode_need(p, end, map->max_osd*sizeof(u32), e_inval);
+
+       for (i = 0; i < map->max_osd; i++) {
+               int ret;
+
+               ret = set_primary_affinity(map, i, ceph_decode_32(p));
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
+
+e_inval:
+       return -EINVAL;
+}
+
+static int decode_new_primary_affinity(void **p, void *end,
+                                      struct ceph_osdmap *map)
+{
+       u32 n;
+
+       ceph_decode_32_safe(p, end, n, e_inval);
+       while (n--) {
+               u32 osd, aff;
+               int ret;
+
+               ceph_decode_32_safe(p, end, osd, e_inval);
+               ceph_decode_32_safe(p, end, aff, e_inval);
+
+               ret = set_primary_affinity(map, osd, aff);
+               if (ret)
+                       return ret;
+       }
+
+       return 0;
+
+e_inval:
+       return -EINVAL;
+}
+
 /*
  * decode a full map.
  */
@@ -1042,6 +1096,17 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
                        goto bad;
        }
 
+       /* primary_affinity */
+       if (struct_v >= 2) {
+               err = decode_primary_affinity(p, end, map);
+               if (err)
+                       goto bad;
+       } else {
+               /* XXX can this happen? */
+               kfree(map->osd_primary_affinity);
+               map->osd_primary_affinity = NULL;
+       }
+
        /* crush */
        ceph_decode_32_safe(p, end, len, e_inval);
        map->crush = crush_decode(*p, min(*p + len, end));
@@ -1249,6 +1314,13 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                        goto bad;
        }
 
+       /* new_primary_affinity */
+       if (struct_v >= 2) {
+               err = decode_new_primary_affinity(p, end, map);
+               if (err)
+                       goto bad;
+       }
+
        /* ignore the rest */
        *p = end;