net: core: Convert inet_addr_is_any() to sockaddr_storage

All the callers of inet_addr_is_any() have a sockaddr_storage-backed
sockaddr. Avoid casts and switch prototype to the actual object being
used.

Reviewed-by: Kuniyuki Iwashima <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]> # SCSI
Signed-off-by: Kees Cook <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

Author: kees

drivers/nvme/target/rdma.c

@@ -1999,7 +1999,7 @@ static void nvmet_rdma_disc_port_addr(struct nvmet_req *req,
 	struct nvmet_rdma_port *port = nport->priv;
 	struct rdma_cm_id *cm_id = port->cm_id;
 
-	if (inet_addr_is_any((struct sockaddr *)&cm_id->route.addr.src_addr)) {
+	if (inet_addr_is_any(&cm_id->route.addr.src_addr)) {
 		struct nvmet_rdma_rsp *rsp =
 			container_of(req, struct nvmet_rdma_rsp, req);
 		struct rdma_cm_id *req_cm_id = rsp->queue->cm_id;

drivers/nvme/target/tcp.c

@@ -2194,7 +2194,7 @@ static void nvmet_tcp_disc_port_addr(struct nvmet_req *req,
 {
 	struct nvmet_tcp_port *port = nport->priv;
 
-	if (inet_addr_is_any((struct sockaddr *)&port->addr)) {
+	if (inet_addr_is_any(&port->addr)) {
 		struct nvmet_tcp_cmd *cmd =
 			container_of(req, struct nvmet_tcp_cmd, req);
 		struct nvmet_tcp_queue *queue = cmd->queue;

drivers/target/iscsi/iscsi_target.c

@@ -3419,7 +3419,7 @@ iscsit_build_sendtargets_response(struct iscsit_cmd *cmd,
 					}
 				}
 
-				if (inet_addr_is_any((struct sockaddr *)&np->np_sockaddr))
+				if (inet_addr_is_any(&np->np_sockaddr))
 					sockaddr = &conn->local_sockaddr;
 				else
 					sockaddr = &np->np_sockaddr;

include/linux/inet.h

@@ -55,6 +55,6 @@ extern int in6_pton(const char *src, int srclen, u8 *dst, int delim, const char
 
 extern int inet_pton_with_scope(struct net *net, unsigned short af,
 		const char *src, const char *port, struct sockaddr_storage *addr);
-extern bool inet_addr_is_any(struct sockaddr *addr);
+bool inet_addr_is_any(struct sockaddr_storage *addr);
 
 #endif	/* _LINUX_INET_H */

net/core/utils.c

@@ -399,23 +399,23 @@ int inet_pton_with_scope(struct net *net, __kernel_sa_family_t af,
 }
 EXPORT_SYMBOL(inet_pton_with_scope);
 
-bool inet_addr_is_any(struct sockaddr *addr)
+bool inet_addr_is_any(struct sockaddr_storage *addr)
 {
-	if (addr->sa_family == AF_INET6) {
+	if (addr->ss_family == AF_INET6) {
 		struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)addr;
 		const struct sockaddr_in6 in6_any =
 			{ .sin6_addr = IN6ADDR_ANY_INIT };
 
 		if (!memcmp(in6->sin6_addr.s6_addr,
 			    in6_any.sin6_addr.s6_addr, 16))
 			return true;
-	} else if (addr->sa_family == AF_INET) {
+	} else if (addr->ss_family == AF_INET) {
 		struct sockaddr_in *in = (struct sockaddr_in *)addr;
 
 		if (in->sin_addr.s_addr == htonl(INADDR_ANY))
 			return true;
 	} else {
-		pr_warn("unexpected address family %u\n", addr->sa_family);
+		pr_warn("unexpected address family %u\n", addr->ss_family);
 	}
 
 	return false;