X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fsessiond-comm%2Finet.c;h=35ce3b6b5c9ca2a720a509d3d95aa172931a221a;hp=eb0c4fde3f6972de1d846020f10aa58a0deaad35;hb=14b88ccfe8d51fe8a19e525d8b6a5e4614eccb46;hpb=783a3b9aa609d6805e1463655d25c7ae176c4859

diff --git a/src/common/sessiond-comm/inet.c b/src/common/sessiond-comm/inet.c
index eb0c4fde3..35ce3b6b5 100644
--- a/src/common/sessiond-comm/inet.c
+++ b/src/common/sessiond-comm/inet.c
@@ -15,7 +15,7 @@
  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <assert.h>
 #include <limits.h>
 #include <stdio.h>
@@ -50,6 +50,8 @@ static const struct lttcomm_proto_ops inet_ops = {
 	.sendmsg = lttcomm_sendmsg_inet_sock,
 };
 
+unsigned long lttcomm_inet_tcp_timeout;
+
 /*
  * Creates an PF_INET socket.
  */
@@ -101,7 +103,7 @@ int lttcomm_bind_inet_sock(struct lttcomm_sock *sock)
 {
 	int ret;
 
-	ret = bind(sock->fd, &sock->sockaddr.addr.sin,
+	ret = bind(sock->fd, (const struct sockaddr *) &sock->sockaddr.addr.sin,
 			sizeof(sock->sockaddr.addr.sin));
 	if (ret < 0) {
 		PERROR("bind inet");
@@ -273,6 +275,7 @@ struct lttcomm_sock *lttcomm_accept_inet_sock(struct lttcomm_sock *sock)
 	int new_fd;
 	socklen_t len;
 	struct lttcomm_sock *new_sock;
+	unsigned long timeout;
 
 	if (sock->proto == LTTCOMM_SOCK_UDP) {
 		/*
@@ -296,6 +299,19 @@ struct lttcomm_sock *lttcomm_accept_inet_sock(struct lttcomm_sock *sock)
 		PERROR("accept inet");
 		goto error;
 	}
+	timeout = lttcomm_get_network_timeout();
+	if (timeout) {
+		int ret;
+
+		ret = lttcomm_setsockopt_rcv_timeout(new_fd, timeout);
+		if (ret) {
+			goto error_close;
+		}
+		ret = lttcomm_setsockopt_snd_timeout(new_fd, timeout);
+		if (ret) {
+			goto error_close;
+		}
+	}
 
 	new_sock->fd = new_fd;
 	new_sock->ops = &inet_ops;
@@ -303,6 +319,11 @@ struct lttcomm_sock *lttcomm_accept_inet_sock(struct lttcomm_sock *sock)
 end:
 	return new_sock;
 
+error_close:
+	if (close(new_fd) < 0) {
+		PERROR("accept inet close fd");
+	}
+
 error:
 	free(new_sock);
 	return NULL;
@@ -448,3 +469,81 @@ int lttcomm_close_inet_sock(struct lttcomm_sock *sock)
 
 	return ret;
 }
+
+/*
+ * Return value read from /proc or else 0 if value is not found.
+ */
+static unsigned long read_proc_value(const char *path)
+{
+	int ret, fd;
+	ssize_t size_ret;
+	long r_val;
+	unsigned long val = 0;
+	char buf[64];
+
+	fd = open(path, O_RDONLY);
+	if (fd < 0) {
+		goto error;
+	}
+
+	size_ret = lttng_read(fd, buf, sizeof(buf));
+	/*
+	 * Allow reading a file smaller than buf, but keep space for
+	 * final \0.
+	 */
+	if (size_ret < 0 || size_ret >= sizeof(buf)) {
+		PERROR("read proc failed");
+		goto error_close;
+	}
+	buf[size_ret] = '\0';
+
+	errno = 0;
+	r_val = strtol(buf, NULL, 10);
+	if (errno != 0 || r_val < -1L) {
+		val = 0;
+		goto error_close;
+	} else {
+		if (r_val > 0) {
+			val = r_val;
+		}
+	}
+
+error_close:
+	ret = close(fd);
+	if (ret) {
+		PERROR("close /proc value");
+	}
+error:
+	return val;
+}
+
+LTTNG_HIDDEN
+void lttcomm_inet_init(void)
+{
+	unsigned long syn_retries, fin_timeout, syn_timeout, env;
+
+	env = lttcomm_get_network_timeout();
+	if (env) {
+		lttcomm_inet_tcp_timeout = env;
+		goto end;
+	}
+
+	/* Assign default value and see if we can change it. */
+	lttcomm_inet_tcp_timeout = DEFAULT_INET_TCP_TIMEOUT;
+
+	syn_retries = read_proc_value(LTTCOMM_INET_PROC_SYN_RETRIES_PATH);
+	fin_timeout = read_proc_value(LTTCOMM_INET_PROC_FIN_TIMEOUT_PATH);
+
+	syn_timeout = syn_retries * LTTCOMM_INET_SYN_TIMEOUT_FACTOR;
+
+	/*
+	 * Get the maximum between the two possible timeout value and use that to
+	 * get the maximum with the default timeout.
+	 */
+	lttcomm_inet_tcp_timeout = max_t(unsigned long,
+			max_t(unsigned long, syn_timeout, fin_timeout),
+			lttcomm_inet_tcp_timeout);
+
+end:
+	DBG("TCP inet operation timeout set to %lu sec", lttcomm_inet_tcp_timeout);
+}