selftests: net: Use size_t and ssize_t for counting file size

Use size_t and ssize_t correctly for counting send file size
instead of unsigned long and long, because long is 32bit on
32bit arch, which is not enough for counting long file size (>4GB).
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/net/tcp_mmap.c

@@ -71,7 +71,7 @@
 #define MSG_ZEROCOPY    0x4000000
 #endif
 
-#define FILE_SZ (1UL << 35)
+#define FILE_SZ (1ULL << 35)
 static int cfg_family = AF_INET6;
 static socklen_t cfg_alen = sizeof(struct sockaddr_in6);
 static int cfg_port = 8787;
@@ -155,7 +155,7 @@ void *child_thread(void *arg)
 			socklen_t zc_len = sizeof(zc);
 			int res;
 
-			zc.address = (__u64)addr;
+			zc.address = (__u64)((unsigned long)addr);
 			zc.length = chunk_size;
 			zc.recv_skip_hint = 0;
 			res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE,
@@ -302,7 +302,7 @@ int main(int argc, char *argv[])
 {
 	struct sockaddr_storage listenaddr, addr;
 	unsigned int max_pacing_rate = 0;
-	unsigned long total = 0;
+	size_t total = 0;
 	char *host = NULL;
 	int fd, c, on = 1;
 	char *buffer;
@@ -417,7 +417,7 @@ int main(int argc, char *argv[])
 		zflg = 0;
 	}
 	while (total < FILE_SZ) {
-		long wr = FILE_SZ - total;
+		ssize_t wr = FILE_SZ - total;
 
 		if (wr > chunk_size)
 			wr = chunk_size;