X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconsumer.c;h=1045bfb46101d8a6bb63a8c91157f3ffbf5199a2;hp=0df073523e5361e09050c7b8dcd8f47bfdd09e2a;hb=534d2592c0566f7c07cd9e9f9385781a65566e16;hpb=0d9c5d7750202aa5f46cd7c6f642fb31fe1556c4 diff --git a/src/common/consumer.c b/src/common/consumer.c index 0df073523..1045bfb46 100644 --- a/src/common/consumer.c +++ b/src/common/consumer.c @@ -782,6 +782,13 @@ static int write_relayd_stream_header(struct lttng_consumer_stream *stream, data_hdr.stream_id = htobe64(stream->relayd_stream_id); data_hdr.data_size = htobe32(data_size); data_hdr.padding_size = htobe32(padding); + /* + * Note that net_seq_num below is assigned with the *current* value of + * next_net_seq_num and only after that the next_net_seq_num will be + * increment. This is why when issuing a command on the relayd using + * this next value, 1 should always be substracted in order to compare + * the last seen sequence number on the relayd side to the last sent. + */ data_hdr.net_seq_num = htobe64(stream->next_net_seq_num++); /* Other fields are zeroed previously */ @@ -1099,7 +1106,7 @@ void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx) do { ret = write(ctx->consumer_should_quit[1], "4", 1); } while (ret < 0 && errno == EINTR); - if (ret < 0) { + if (ret < 0 || ret != 1) { PERROR("write consumer quit"); } @@ -1317,8 +1324,22 @@ static int write_relayd_metadata_id(int fd, do { ret = write(fd, (void *) &hdr, sizeof(hdr)); } while (ret < 0 && errno == EINTR); - if (ret < 0) { - PERROR("write metadata stream id"); + if (ret < 0 || ret != sizeof(hdr)) { + /* + * This error means that the fd's end is closed so ignore the perror + * not to clubber the error output since this can happen in a normal + * code path. + */ + if (errno != EPIPE) { + PERROR("write metadata stream id"); + } + DBG3("Consumer failed to write relayd metadata id (errno: %d)", errno); + /* + * Set ret to a negative value because if ret != sizeof(hdr), we don't + * handle writting the missing part so report that as an error and + * don't lie to the caller. + */ + ret = -1; goto end; } DBG("Metadata stream id %" PRIu64 " with padding %lu written before data", @@ -1435,7 +1456,13 @@ ssize_t lttng_consumer_on_read_subbuffer_mmap( } while (ret < 0 && errno == EINTR); DBG("Consumer mmap write() ret %zd (len %lu)", ret, len); if (ret < 0) { - PERROR("Error in file write"); + /* + * This is possible if the fd is closed on the other side (outfd) + * or any write problem. It can be verbose a bit for a normal + * execution if for instance the relayd is stopped abruptly. This + * can happen so set this to a DBG statement. + */ + DBG("Error in file write mmap"); if (written == 0) { written = ret; } @@ -2102,12 +2129,12 @@ void *consumer_thread_metadata_poll(void *data) while (1) { /* Only the metadata pipe is set */ - if (events.nb_fd == 0 && consumer_quit == 1) { + if (LTTNG_POLL_GETNB(&events) == 0 && consumer_quit == 1) { goto end; } restart: - DBG("Metadata poll wait with %d fd(s)", events.nb_fd); + DBG("Metadata poll wait with %d fd(s)", LTTNG_POLL_GETNB(&events)); ret = lttng_poll_wait(&events, -1); DBG("Metadata event catched in thread"); if (ret < 0) { @@ -2364,6 +2391,11 @@ void *consumer_thread_data_poll(void *data) pipe_readlen = read(ctx->consumer_data_pipe[0], &new_stream, sizeof(new_stream)); } while (pipe_readlen == -1 && errno == EINTR); + if (pipe_readlen < 0) { + PERROR("read consumer data pipe"); + /* Continue so we can at least handle the current stream(s). */ + continue; + } /* * If the stream is NULL, just ignore it. It's also possible that @@ -2571,7 +2603,7 @@ void *consumer_thread_sessiond_poll(void *data) /* Blocking call, waiting for transmission */ sock = lttcomm_accept_unix_sock(client_socket); - if (sock <= 0) { + if (sock < 0) { WARN("On accept"); goto end; } @@ -2733,6 +2765,7 @@ int consumer_add_relayd_socket(int net_seq_idx, int sock_type, relayd = consumer_allocate_relayd_sock_pair(net_seq_idx); if (relayd == NULL) { lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); + ret = -1; goto error; } relayd->sessiond_session_id = (uint64_t) sessiond_id; @@ -2782,11 +2815,17 @@ int consumer_add_relayd_socket(int net_seq_idx, int sock_type, relayd->control_sock.fd = fd; /* - * Create a session on the relayd and store the returned id. No need to - * grab the socket lock since the relayd object is not yet visible. + * Create a session on the relayd and store the returned id. Lock the + * control socket mutex if the relayd was NOT created before. */ + if (!relayd_created) { + pthread_mutex_lock(&relayd->ctrl_sock_mutex); + } ret = relayd_create_session(&relayd->control_sock, &relayd->relayd_session_id); + if (!relayd_created) { + pthread_mutex_unlock(&relayd->ctrl_sock_mutex); + } if (ret < 0) { goto error; } @@ -2795,6 +2834,7 @@ int consumer_add_relayd_socket(int net_seq_idx, int sock_type, relayd_id_node = zmalloc(sizeof(struct consumer_relayd_session_id)); if (!relayd_id_node) { PERROR("zmalloc relayd id node"); + ret = -1; goto error; } @@ -2829,6 +2869,7 @@ int consumer_add_relayd_socket(int net_seq_idx, int sock_type, break; default: ERR("Unknown relayd socket type (%d)", sock_type); + ret = -1; goto error; } @@ -3006,10 +3047,12 @@ int consumer_data_pending(uint64_t id) if (relayd) { pthread_mutex_lock(&relayd->ctrl_sock_mutex); if (stream->metadata_flag) { - ret = relayd_quiescent_control(&relayd->control_sock); + ret = relayd_quiescent_control(&relayd->control_sock, + stream->relayd_stream_id); } else { ret = relayd_data_pending(&relayd->control_sock, - stream->relayd_stream_id, stream->next_net_seq_num); + stream->relayd_stream_id, + stream->next_net_seq_num - 1); } pthread_mutex_unlock(&relayd->ctrl_sock_mutex); if (ret == 1) { @@ -3028,10 +3071,12 @@ int consumer_data_pending(uint64_t id) ret = relayd_end_data_pending(&relayd->control_sock, relayd->relayd_session_id, &is_data_inflight); pthread_mutex_unlock(&relayd->ctrl_sock_mutex); - if (ret < 0 || !is_data_inflight) { - /* On error or if NO data inflight, no data is pending. */ + if (ret < 0) { goto data_not_pending; } + if (is_data_inflight) { + goto data_pending; + } } /*