libceph: use TYPE_LEGACY for entity addrs instead of TYPE_NONE

Going forward, we'll have different address types so let's use
the addr2 TYPE_LEGACY for internal tracking rather than TYPE_NONE.

Also, make ceph_pr_addr print the address type value as well.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

include/linux/ceph/decode.h

@@ -218,16 +218,23 @@ static inline void ceph_encode_timespec64(struct ceph_timespec *tv,
 /*
  * sockaddr_storage <-> ceph_sockaddr
  */
+#define CEPH_ENTITY_ADDR_TYPE_NONE	0
+#define CEPH_ENTITY_ADDR_TYPE_LEGACY	__cpu_to_le32(1)
+
 static inline void ceph_encode_addr(struct ceph_entity_addr *a)
 {
 	__be16 ss_family = htons(a->in_addr.ss_family);
 	a->in_addr.ss_family = *(__u16 *)&ss_family;
+
+	/* Banner addresses require TYPE_NONE */
+	a->type = CEPH_ENTITY_ADDR_TYPE_NONE;
 }
 static inline void ceph_decode_addr(struct ceph_entity_addr *a)
 {
 	__be16 ss_family = *(__be16 *)&a->in_addr.ss_family;
 	a->in_addr.ss_family = ntohs(ss_family);
 	WARN_ON(a->in_addr.ss_family == 512);
+	a->type = CEPH_ENTITY_ADDR_TYPE_LEGACY;
 }
 
 extern int ceph_decode_entity_addr(void **p, void *end,

net/ceph/decode.c

@@ -21,17 +21,6 @@ ceph_decode_entity_addr_versioned(void **p, void *end,
 
 	ceph_decode_copy_safe(p, end, &addr->type, sizeof(addr->type), bad);
 
-	/*
-	 * TYPE_NONE == 0
-	 * TYPE_LEGACY == 1
-	 *
-	 * Clients that don't support ADDR2 always send TYPE_NONE.
-	 * For now, since all we support is msgr1, just set this to 0
-	 * when we get a TYPE_LEGACY type.
-	 */
-	if (addr->type == cpu_to_le32(1))
-		addr->type = 0;
-
 	ceph_decode_copy_safe(p, end, &addr->nonce, sizeof(addr->nonce), bad);
 
 	ceph_decode_32_safe(p, end, addr_len, bad);
@@ -61,7 +50,12 @@ ceph_decode_entity_addr_legacy(void **p, void *end,
 
 	/* Skip rest of type field */
 	ceph_decode_skip_n(p, end, 3, bad);
-	addr->type = 0;
+
+	/*
+	 * Clients that don't support ADDR2 always send TYPE_NONE, change it
+	 * to TYPE_LEGACY for forward compatibility.
+	 */
+	addr->type = CEPH_ENTITY_ADDR_TYPE_LEGACY;
 	ceph_decode_copy_safe(p, end, &addr->nonce, sizeof(addr->nonce), bad);
 	memset(&addr->in_addr, 0, sizeof(addr->in_addr));
 	ceph_decode_copy_safe(p, end, &addr->in_addr,

net/ceph/messenger.c

@@ -199,12 +199,14 @@ const char *ceph_pr_addr(const struct ceph_entity_addr *addr)
 
 	switch (ss.ss_family) {
 	case AF_INET:
-		snprintf(s, MAX_ADDR_STR_LEN, "%pI4:%hu", &in4->sin_addr,
+		snprintf(s, MAX_ADDR_STR_LEN, "(%d)%pI4:%hu",
+			 le32_to_cpu(addr->type), &in4->sin_addr,
 			 ntohs(in4->sin_port));
 		break;
 
 	case AF_INET6:
-		snprintf(s, MAX_ADDR_STR_LEN, "[%pI6c]:%hu", &in6->sin6_addr,
+		snprintf(s, MAX_ADDR_STR_LEN, "(%d)[%pI6c]:%hu",
+			 le32_to_cpu(addr->type), &in6->sin6_addr,
 			 ntohs(in6->sin6_port));
 		break;
 
@@ -1982,6 +1984,7 @@ int ceph_parse_ips(const char *c, const char *end,
 		}
 
 		addr_set_port(&addr[i], port);
+		addr[i].type = CEPH_ENTITY_ADDR_TYPE_LEGACY;
 
 		dout("parse_ips got %s\n", ceph_pr_addr(&addr[i]));