Use non-blocking recvmsg() for data/ctrl connections of lttng-relayd

[lttng-tools.git] / src / common / sessiond-comm / inet.c

diff --git a/src/common/sessiond-comm/inet.c b/src/common/sessiond-comm/inet.c
index e48f2c9ad8195d7cf90bc76d48715e414a6d6d26..e0b3e7a96ffb1d13324ae0bbb9f7b58238df93be 100644 (file)
--- a/src/common/sessiond-comm/inet.c
+++ b/src/common/sessiond-comm/inet.c
@@ -384,18 +384,22 @@ 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) {
                PERROR("recvmsg inet");
        } else if (ret > 0) {
                ret = len;
        }
        /* Else ret = 0 meaning an orderly shutdown. */
-
+end:
        return ret;
 }