X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fsessiond-comm%2Finet.c;h=57ffbe45c28ed1ae68bded38f4713f901a23deb1;hp=b870deef48b325614d73412a169ef086b02f5245;hb=c2e8c3663b99ba900f4733696c70e7a5e32ae1a7;hpb=c2d6932774987366baf42a93461cd73c38f1113a

diff --git a/src/common/sessiond-comm/inet.c b/src/common/sessiond-comm/inet.c
index b870deef4..57ffbe45c 100644
--- a/src/common/sessiond-comm/inet.c
+++ b/src/common/sessiond-comm/inet.c
@@ -26,15 +26,14 @@
 #include <unistd.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <time.h>
+#include <common/compat/time.h>
 #include <poll.h>
 
 #include <common/common.h>
+#include <common/time.h>
 
 #include "inet.h"
 
-#define MSEC_PER_SEC	1000
-#define NSEC_PER_MSEC	1000000
 #define RECONNECT_DELAY	200	/* ms */
 
 /*
@@ -101,15 +100,9 @@ error:
 LTTNG_HIDDEN
 int lttcomm_bind_inet_sock(struct lttcomm_sock *sock)
 {
-	int ret;
-
-	ret = bind(sock->fd, (const struct sockaddr *) &sock->sockaddr.addr.sin,
+	return bind(sock->fd,
+			(const struct sockaddr *) &sock->sockaddr.addr.sin,
 			sizeof(sock->sockaddr.addr.sin));
-	if (ret < 0) {
-		PERROR("bind inet");
-	}
-
-	return ret;
 }
 
 static
@@ -119,31 +112,13 @@ int connect_no_timeout(struct lttcomm_sock *sock)
 			sizeof(sock->sockaddr.addr.sin));
 }
 
-/*
- * Return time_a - time_b  in milliseconds.
- */
-static
-unsigned long time_diff_ms(struct timespec *time_a,
-		struct timespec *time_b)
-{
-	time_t sec_diff;
-	long nsec_diff;
-	unsigned long result_ms;
-
-	sec_diff = time_a->tv_sec - time_b->tv_sec;
-	nsec_diff = time_a->tv_nsec - time_b->tv_nsec;
-
-	result_ms = sec_diff * MSEC_PER_SEC;
-	result_ms += nsec_diff / NSEC_PER_MSEC;
-	return result_ms;
-}
-
 static
 int connect_with_timeout(struct lttcomm_sock *sock)
 {
 	unsigned long timeout = lttcomm_get_network_timeout();
 	int ret, flags, connect_ret;
 	struct timespec orig_time, cur_time;
+	unsigned long diff_ms;
 
 	ret = fcntl(sock->fd, F_GETFL, 0);
 	if (ret == -1) {
@@ -159,7 +134,7 @@ int connect_with_timeout(struct lttcomm_sock *sock)
 		return -1;
 	}
 
-	ret = clock_gettime(CLOCK_MONOTONIC, &orig_time);
+	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
 	if (ret == -1) {
 		PERROR("clock_gettime");
 		return -1;
@@ -177,6 +152,8 @@ int connect_with_timeout(struct lttcomm_sock *sock)
 		goto success;
 	}
 
+	DBG("Asynchronous connect for sock %d, performing polling with"
+			" timeout: %lums", sock->fd, timeout);
 	/*
 	 * Perform poll loop following EINPROGRESS recommendation from
 	 * connect(2) man page.
@@ -203,23 +180,31 @@ int connect_with_timeout(struct lttcomm_sock *sock)
 			ret = getsockopt(sock->fd, SOL_SOCKET,
 				SO_ERROR, &optval, &optval_len);
 			if (ret) {
+				PERROR("getsockopt");
 				goto error;
 			}
 			if (!optval) {
 				connect_ret = 0;
 				goto success;
 			} else {
+				/* Get actual connect() errno from opt_val */
+				errno = optval;
 				goto error;
 			}
 		}
 		/* ret == 0: timeout */
-		ret = clock_gettime(CLOCK_MONOTONIC, &cur_time);
+		ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
 		if (ret == -1) {
 			PERROR("clock_gettime");
 			connect_ret = ret;
 			goto error;
 		}
-	} while (time_diff_ms(&cur_time, &orig_time) < timeout);
+		if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
+			ERR("timespec_to_ms input overflows milliseconds output");
+			connect_ret = -1;
+			goto error;
+		}
+	} while (diff_ms < timeout);
 
 	/* Timeout */
 	errno = ETIMEDOUT;
@@ -386,18 +371,31 @@ ssize_t lttcomm_recvmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
 		len_last = iov[0].iov_len;
 		ret = recvmsg(sock->fd, &msg, flags);
 		if (ret > 0) {
+			if (flags & MSG_DONTWAIT) {
+				goto end;
+			}
 			iov[0].iov_base += ret;
 			iov[0].iov_len -= ret;
 			assert(ret <= len_last);
 		}
 	} while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR));
+
 	if (ret < 0) {
+		if (errno == EAGAIN && flags & MSG_DONTWAIT) {
+			/*
+			 * EAGAIN is expected in non-blocking mode and should
+			 * not be reported as an error. Moreover, if no data
+			 * was read, 0 must not be returned as it would be
+			 * interpreted as an orderly shutdown of the socket.
+			 */
+			goto end;
+		}
 		PERROR("recvmsg inet");
 	} else if (ret > 0) {
 		ret = len;
 	}
 	/* Else ret = 0 meaning an orderly shutdown. */
-
+end:
 	return ret;
 }