From 103e2d3ae57d38d18aaac1b327266c1407499ac1 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Thu, 7 Jan 2010 16:12:36 -0800
Subject: ceph: remove unused erank field

The ceph_entity_addr erank field is obsolete; remove it.  Get rid of
trivial addr comparison helpers while we're at it.

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

diff --git a/fs/ceph/messenger.c b/fs/ceph/messenger.c
index c1106e8..1360708 100644
--- a/fs/ceph/messenger.c
+++ b/fs/ceph/messenger.c
@@ -1056,16 +1056,15 @@ static int process_banner(struct ceph_connection *con)
 	 * end may not yet know their ip address, so if it's 0.0.0.0, give
 	 * them the benefit of the doubt.
 	 */
-	if (!ceph_entity_addr_is_local(&con->peer_addr,
-				       &con->actual_peer_addr) &&
+	if (memcmp(&con->peer_addr, &con->actual_peer_addr,
+		   sizeof(con->peer_addr)) != 0 &&
 	    !(addr_is_blank(&con->actual_peer_addr.in_addr) &&
 	      con->actual_peer_addr.nonce == con->peer_addr.nonce)) {
-		pr_warning("wrong peer, want %s/%d, "
-		       "got %s/%d\n",
-		       pr_addr(&con->peer_addr.in_addr),
-		       con->peer_addr.nonce,
-		       pr_addr(&con->actual_peer_addr.in_addr),
-		       con->actual_peer_addr.nonce);
+		pr_warning("wrong peer, want %s/%lld, got %s/%lld\n",
+			   pr_addr(&con->peer_addr.in_addr),
+			   le64_to_cpu(con->peer_addr.nonce),
+			   pr_addr(&con->actual_peer_addr.in_addr),
+			   le64_to_cpu(con->actual_peer_addr.nonce));
 		con->error_msg = "wrong peer at address";
 		return -1;
 	}
@@ -1934,8 +1933,7 @@ struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr)
 		msgr->inst.addr = *myaddr;
 
 	/* select a random nonce */
-	get_random_bytes(&msgr->inst.addr.nonce,
-			 sizeof(msgr->inst.addr.nonce));
+	get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce));
 	encode_my_addr(msgr);
 
 	dout("messenger_create %p\n", msgr);
@@ -1966,7 +1964,6 @@ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg)
 	msg->hdr.src.name = con->msgr->inst.name;
 	msg->hdr.src.addr = con->msgr->my_enc_addr;
 	msg->hdr.orig_src = msg->hdr.src;
-	msg->hdr.dst_erank = con->peer_addr.erank;
 
 	/* queue */
 	mutex_lock(&con->mutex);
diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c
index bb94006..223e8bc 100644
--- a/fs/ceph/mon_client.c
+++ b/fs/ceph/mon_client.c
@@ -88,7 +88,7 @@ int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr)
 	int i;
 
 	for (i = 0; i < m->num_mon; i++)
-		if (ceph_entity_addr_equal(addr, &m->mon_inst[i].addr))
+		if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0)
 			return 1;
 	return 0;
 }
@@ -503,7 +503,6 @@ static int build_initial_monmap(struct ceph_mon_client *monc)
 		return -ENOMEM;
 	for (i = 0; i < num_mon; i++) {
 		monc->monmap->mon_inst[i].addr = mon_addr[i];
-		monc->monmap->mon_inst[i].addr.erank = 0;
 		monc->monmap->mon_inst[i].addr.nonce = 0;
 		monc->monmap->mon_inst[i].name.type =
 			CEPH_ENTITY_TYPE_MON;
diff --git a/fs/ceph/msgr.h b/fs/ceph/msgr.h
index be83f93..40b6189 100644
--- a/fs/ceph/msgr.h
+++ b/fs/ceph/msgr.h
@@ -61,24 +61,10 @@ extern const char *ceph_entity_type_name(int type);
  * entity_addr -- network address
  */
 struct ceph_entity_addr {
-	__le32 erank;  /* entity's rank in process */
-	__le32 nonce;  /* unique id for process (e.g. pid) */
+	__le64 nonce;  /* unique id for process (e.g. pid) */
 	struct sockaddr_storage in_addr;
 } __attribute__ ((packed));
 
-static inline bool ceph_entity_addr_is_local(const struct ceph_entity_addr *a,
-					     const struct ceph_entity_addr *b)
-{
-	return a->nonce == b->nonce &&
-		memcmp(&a->in_addr, &b->in_addr, sizeof(a->in_addr)) == 0;
-}
-
-static inline bool ceph_entity_addr_equal(const struct ceph_entity_addr *a,
-					  const struct ceph_entity_addr *b)
-{
-	return memcmp(a, b, sizeof(*a)) == 0;
-}
-
 struct ceph_entity_inst {
 	struct ceph_entity_name name;
 	struct ceph_entity_addr addr;
@@ -147,7 +133,7 @@ struct ceph_msg_header {
 			     receiver: mask against ~PAGE_MASK */
 
 	struct ceph_entity_inst src, orig_src;
-	__le32 dst_erank;
+	__le32 reserved;
 	__le32 crc;       /* header crc32c */
 } __attribute__ ((packed));
 
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
index a0aac43..80b868f 100644
--- a/fs/ceph/osd_client.c
+++ b/fs/ceph/osd_client.c
@@ -821,9 +821,10 @@ static void kick_requests(struct ceph_osd_client *osdc,
 
 			n = rb_next(p);
 			if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
-			    !ceph_entity_addr_equal(&osd->o_con.peer_addr,
-					    ceph_osd_addr(osdc->osdmap,
-							  osd->o_osd)))
+			    memcmp(&osd->o_con.peer_addr,
+				   ceph_osd_addr(osdc->osdmap,
+						 osd->o_osd),
+				   sizeof(struct ceph_entity_addr)) != 0)
 				reset_osd(osdc, osd);
 		}
 	}
-- 
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