ceph: fix pg pool decoding from incremental osdmap update

The incremental map decoding of pg pool updates wasn't skipping
the snaps and removed_snaps vectors.  This caused osd requests
to stall when pool snapshots were created or fs snapshots were
deleted.  Use a common helper for full and incremental map
decoders that decodes pools properly.

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

diff --git a/fs/ceph/osdmap.c b/fs/ceph/osdmap.c
index b83f269..d82fe87 100644 (file)
--- a/fs/ceph/osdmap.c
+++ b/fs/ceph/osdmap.c
@@ -480,6 +480,14 @@ static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, int id)
        return NULL;
 }
 
+void __decode_pool(void **p, struct ceph_pg_pool_info *pi)
+{
+       ceph_decode_copy(p, &pi->v, sizeof(pi->v));
+       calc_pg_masks(pi);
+       *p += le32_to_cpu(pi->v.num_snaps) * sizeof(u64);
+       *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
+}
+
 /*
  * decode a full map.
  */
@@ -526,12 +534,8 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
                                   ev, CEPH_PG_POOL_VERSION);
                        goto bad;
                }
-               ceph_decode_copy(p, &pi->v, sizeof(pi->v));
+               __decode_pool(p, pi);
                __insert_pg_pool(&map->pg_pools, pi);
-               calc_pg_masks(pi);
-               *p += le32_to_cpu(pi->v.num_snaps) * sizeof(u64);
-               *p += le32_to_cpu(pi->v.num_removed_snap_intervals)
-                       * sizeof(u64) * 2;
        }
        ceph_decode_32_safe(p, end, map->pool_max, bad);
 
@@ -714,8 +718,7 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
                        pi->id = pool;
                        __insert_pg_pool(&map->pg_pools, pi);
                }
-               ceph_decode_copy(p, &pi->v, sizeof(pi->v));
-               calc_pg_masks(pi);
+               __decode_pool(p, pi);
        }
 
        /* old_pool */