ceph: add uid field to ceph_pg_pool

Also verify encoding version as we go.
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/osdmap.c

@@ -426,6 +426,11 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 	map->pg_temp = RB_ROOT;
 
 	ceph_decode_16_safe(p, end, version, bad);
+	if (version > CEPH_OSDMAP_VERSION) {
+		pr_warning("got unknown v %d > %d of osdmap\n", version,
+			   CEPH_OSDMAP_VERSION);
+		goto bad;
+	}
 
 	ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
 	ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
@@ -447,6 +452,11 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 		if (i >= map->num_pools)
 			goto bad;
 		ev = ceph_decode_8(p); /* encoding version */
+		if (ev > CEPH_PG_POOL_VERSION) {
+			pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
+				   ev, CEPH_PG_POOL_VERSION);
+			goto bad;
+		}
 		ceph_decode_copy(p, &map->pg_pool[i].v,
 				 sizeof(map->pg_pool->v));
 		calc_pg_masks(&map->pg_pool[i]);
@@ -552,6 +562,11 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
 	struct rb_node *rbp;
 
 	ceph_decode_16_safe(p, end, version, bad);
+	if (version > CEPH_OSDMAP_INC_VERSION) {
+		pr_warning("got unknown v %d > %d of inc osdmap\n", version,
+			   CEPH_OSDMAP_INC_VERSION);
+		goto bad;
+	}
 
 	ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
 			 bad);
@@ -624,6 +639,11 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
 		}
 		ceph_decode_need(p, end, 1 + sizeof(map->pg_pool->v), bad);
 		ev = ceph_decode_8(p);  /* encoding version */
+		if (ev > CEPH_PG_POOL_VERSION) {
+			pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
+				   ev, CEPH_PG_POOL_VERSION);
+			goto bad;
+		}
 		ceph_decode_copy(p, &map->pg_pool[pool].v,
 				 sizeof(map->pg_pool->v));
 		calc_pg_masks(&map->pg_pool[pool]);

fs/ceph/rados.h

@@ -8,6 +8,12 @@
 
 #include "msgr.h"
 
+/*
+ * osdmap encoding versions
+ */
+#define CEPH_OSDMAP_INC_VERSION 3
+#define CEPH_OSDMAP_VERSION     3
+
 /*
  * fs id
  */
@@ -80,6 +86,7 @@ struct ceph_pg {
  */
 #define CEPH_PG_TYPE_REP     1
 #define CEPH_PG_TYPE_RAID4   2
+#define CEPH_PG_POOL_VERSION 2
 struct ceph_pg_pool {
 	__u8 type;                /* CEPH_PG_TYPE_* */
 	__u8 size;                /* number of osds in each pg */
@@ -92,6 +99,7 @@ struct ceph_pg_pool {
 	__le32 snap_epoch;        /* epoch of last snap */
 	__le32 num_snaps;
 	__le32 num_removed_snap_intervals;
+	__le64 uid;
 } __attribute__ ((packed));
 
 /*