ctdb-daemon: Replace function ctdb_ip_to_nodeid() with ctdb_ip_to_pnn()

Node ID is a poorly defined concept, indicating the slot in the node
map where the IP address was found.  This signed value also ends up
compared to num_nodes, which is unsigned, producing unwanted warnings.

Just return the PNN because this what both callers really want.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
(cherry picked from commit 010c1d77cd7e192b1fff39b7b91fccbdbbf4a786)

4 files changed, 18 insertions, 20 deletions

diff --git a/ctdb/include/ctdb_private.h b/ctdb/include/ctdb_private.h
index ea00bb12128..b6d0d0c678a 100644
--- a/ctdb/include/ctdb_private.h
+++ b/ctdb/include/ctdb_private.h
@@ -841,7 +841,8 @@ void ctdb_stop_recoverd(struct ctdb_context *ctdb);
 
 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
 
-int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const ctdb_sock_addr *nodeip);
+uint32_t ctdb_ip_to_pnn(struct ctdb_context *ctdb,
+			const ctdb_sock_addr *nodeip);
 
 void ctdb_load_nodes_file(struct ctdb_context *ctdb);
 
diff --git a/ctdb/server/ctdb_daemon.c b/ctdb/server/ctdb_daemon.c
index ca98be6a100..d79634c3b54 100644
--- a/ctdb/server/ctdb_daemon.c
+++ b/ctdb/server/ctdb_daemon.c
@@ -1251,21 +1251,18 @@ static void ctdb_initialise_vnn_map(struct ctdb_context *ctdb)
 
 static void ctdb_set_my_pnn(struct ctdb_context *ctdb)
 {
-	int nodeid;
-
 	if (ctdb->address == NULL) {
 		ctdb_fatal(ctdb,
 			   "Can not determine PNN - node address is not set\n");
 	}
 
-	nodeid = ctdb_ip_to_nodeid(ctdb, ctdb->address);
-	if (nodeid == -1) {
+	ctdb->pnn = ctdb_ip_to_pnn(ctdb, ctdb->address);
+	if (ctdb->pnn == CTDB_UNKNOWN_PNN) {
 		ctdb_fatal(ctdb,
-			   "Can not determine PNN - node address not found in node list\n");
+			   "Can not determine PNN - unknown node address\n");
 	}
 
-	ctdb->pnn = ctdb->nodes[nodeid]->pnn;
-	DEBUG(DEBUG_NOTICE, ("PNN is %u\n", ctdb->pnn));
+	D_NOTICE("PNN is %u\n", ctdb->pnn);
 }
 
 /*
diff --git a/ctdb/server/ctdb_server.c b/ctdb/server/ctdb_server.c
index c991b85d99b..6973a0b6056 100644
--- a/ctdb/server/ctdb_server.c
+++ b/ctdb/server/ctdb_server.c
@@ -45,24 +45,22 @@ int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport)
 	return 0;
 }
 
-/*
-  Check whether an ip is a valid node ip
-  Returns the node id for this ip address or -1
-*/
-int ctdb_ip_to_nodeid(struct ctdb_context *ctdb, const ctdb_sock_addr *nodeip)
+/* Return the PNN for nodeip, CTDB_UNKNOWN_PNN if nodeip is invalid */
+uint32_t ctdb_ip_to_pnn(struct ctdb_context *ctdb,
+			const ctdb_sock_addr *nodeip)
 {
-	int nodeid;
+	unsigned int nodeid;
 
 	for (nodeid=0;nodeid<ctdb->num_nodes;nodeid++) {
 		if (ctdb->nodes[nodeid]->flags & NODE_FLAGS_DELETED) {
 			continue;
 		}
 		if (ctdb_same_ip(&ctdb->nodes[nodeid]->address, nodeip)) {
-			return nodeid;
+			return ctdb->nodes[nodeid]->pnn;
 		}
 	}
 
-	return -1;
+	return CTDB_UNKNOWN_PNN;
 }
 
 /* Load a nodes list file into a nodes array */
diff --git a/ctdb/tcp/tcp_connect.c b/ctdb/tcp/tcp_connect.c
index 385547e0e78..ccd7c044fb2 100644
--- a/ctdb/tcp/tcp_connect.c
+++ b/ctdb/tcp/tcp_connect.c
@@ -244,7 +244,8 @@ static void ctdb_listen_event(struct tevent_context *ev, struct tevent_fd *fde,
 	struct ctdb_tcp *ctcp = talloc_get_type(ctdb->private_data, struct ctdb_tcp);
 	ctdb_sock_addr addr;
 	socklen_t len;
-	int fd, nodeid;
+	int fd;
+	uint32_t pnn;
 	struct ctdb_incoming *in;
 	int one = 1;
 	int ret;
@@ -255,10 +256,11 @@ static void ctdb_listen_event(struct tevent_context *ev, struct tevent_fd *fde,
 	if (fd == -1) return;
 	smb_set_close_on_exec(fd);
 
-	nodeid = ctdb_ip_to_nodeid(ctdb, &addr);
+	pnn = ctdb_ip_to_pnn(ctdb, &addr);
 
-	if (nodeid == -1) {
-		DEBUG(DEBUG_ERR, ("Refused connection from unknown node %s\n", ctdb_addr_to_str(&addr)));
+	if (pnn == CTDB_UNKNOWN_PNN) {
+		D_ERR("Refused connection from unknown node %s\n",
+		      ctdb_addr_to_str(&addr));
 		close(fd);
 		return;
 	}