X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-relayd%2Flive.c;h=5b9e4248c0e779deadc7b604ace4d928f7c9634f;hb=6763619c3f295a1502e77ca9563d7a21d68b25c7;hp=23cf09eebb6960b0e5436900ffa6e2250529d9cc;hpb=58eb9381cd933f0644e6a5b89750dbd6d9b14570;p=lttng-tools.git diff --git a/src/bin/lttng-relayd/live.c b/src/bin/lttng-relayd/live.c index 23cf09eeb..5b9e4248c 100644 --- a/src/bin/lttng-relayd/live.c +++ b/src/bin/lttng-relayd/live.c @@ -712,9 +712,9 @@ int viewer_connect(struct relay_connection *conn) conn->minor = be32toh(msg.minor); } - if (be32toh(msg.type) == VIEWER_CLIENT_COMMAND) { + if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { conn->type = RELAY_VIEWER_COMMAND; - } else if (be32toh(msg.type) == VIEWER_CLIENT_NOTIFICATION) { + } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { conn->type = RELAY_VIEWER_NOTIFICATION; } else { ERR("Unknown connection type : %u", be32toh(msg.type)); @@ -809,6 +809,32 @@ end: return ret; } +/* + * Check if a connection is attached to a session. + * Return 1 if attached, 0 if not attached, a negative value on error. + */ +static +int session_attached(struct relay_connection *conn, uint64_t session_id) +{ + struct relay_session *session; + int found = 0; + + if (!conn->viewer_session) { + goto end; + } + cds_list_for_each_entry(session, + &conn->viewer_session->sessions_head, + viewer_session_list) { + if (session->id == session_id) { + found = 1; + goto end; + } + } + +end: + return found; +} + /* * Send the viewer the list of current sessions. */ @@ -820,6 +846,7 @@ int viewer_get_new_streams(struct relay_connection *conn) struct lttng_viewer_new_streams_request request; struct lttng_viewer_new_streams_response response; struct relay_session *session; + uint64_t session_id; assert(conn); @@ -832,34 +859,32 @@ int viewer_get_new_streams(struct relay_connection *conn) if (ret < 0) { goto error; } + session_id = be64toh(request.session_id); health_code_update(); rcu_read_lock(); - session = session_find_by_id(conn->sessions_ht, - be64toh(request.session_id)); + session = session_find_by_id(conn->sessions_ht, session_id); if (!session) { - DBG("Relay session %" PRIu64 " not found", - be64toh(request.session_id)); - response.status = htobe32(VIEWER_NEW_STREAMS_ERR); + DBG("Relay session %" PRIu64 " not found", session_id); + response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); goto send_reply; } - if (conn->session_id == session->id) { - /* We confirmed the viewer is asking for the same session. */ - send_streams = 1; - response.status = htobe32(VIEWER_NEW_STREAMS_OK); - } else { + if (!session_attached(conn, session_id)) { send_streams = 0; - response.status = htobe32(VIEWER_NEW_STREAMS_ERR); + response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); goto send_reply; } + send_streams = 1; + response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); + if (!send_streams) { goto send_reply; } - ret = make_viewer_streams(session, VIEWER_SEEK_LAST, NULL, &nb_unsent, + ret = make_viewer_streams(session, LTTNG_VIEWER_SEEK_LAST, NULL, &nb_unsent, &nb_created); if (ret < 0) { goto end_unlock; @@ -868,6 +893,23 @@ int viewer_get_new_streams(struct relay_connection *conn) nb_streams = nb_created + nb_unsent; response.streams_count = htobe32(nb_streams); + /* + * If the session is closed and we have no new streams to send, + * it means that the viewer has already received the whole trace + * for this session and should now close it. + */ + if (nb_streams == 0 && session->close_flag) { + send_streams = 0; + response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); + /* + * Remove the session from the attached list of the connection + * and try to destroy it. + */ + cds_list_del(&session->viewer_session_list); + session_viewer_try_destroy(conn->sessions_ht, session); + goto send_reply; + } + send_reply: health_code_update(); ret = send_response(conn->sock, &response, sizeof(response)); @@ -926,13 +968,19 @@ int viewer_attach_session(struct relay_connection *conn) health_code_update(); + if (!conn->viewer_session) { + DBG("Client trying to attach before creating a live viewer session"); + response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); + goto send_reply; + } + rcu_read_lock(); session = session_find_by_id(conn->sessions_ht, be64toh(request.session_id)); if (!session) { DBG("Relay session %" PRIu64 " not found", be64toh(request.session_id)); - response.status = htobe32(VIEWER_ATTACH_UNK); + response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); goto send_reply; } session_viewer_attach(session); @@ -940,28 +988,28 @@ int viewer_attach_session(struct relay_connection *conn) if (uatomic_read(&session->viewer_refcount) > 1) { DBG("Already a viewer attached"); - response.status = htobe32(VIEWER_ATTACH_ALREADY); + response.status = htobe32(LTTNG_VIEWER_ATTACH_ALREADY); session_viewer_detach(session); goto send_reply; } else if (session->live_timer == 0) { DBG("Not live session"); - response.status = htobe32(VIEWER_ATTACH_NOT_LIVE); + response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); goto send_reply; } else { send_streams = 1; - response.status = htobe32(VIEWER_ATTACH_OK); - conn->session_id = session->id; - conn->session = session; + response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); + cds_list_add(&session->viewer_session_list, + &conn->viewer_session->sessions_head); } switch (be32toh(request.seek)) { - case VIEWER_SEEK_BEGINNING: - case VIEWER_SEEK_LAST: + case LTTNG_VIEWER_SEEK_BEGINNING: + case LTTNG_VIEWER_SEEK_LAST: seek_type = be32toh(request.seek); break; default: ERR("Wrong seek parameter"); - response.status = htobe32(VIEWER_ATTACH_SEEK_ERR); + response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); send_streams = 0; goto send_reply; } @@ -1035,14 +1083,14 @@ int viewer_get_next_index(struct relay_connection *conn) health_code_update(); rcu_read_lock(); - session = session_find_by_id(conn->sessions_ht, conn->session_id); - if (!session) { + vstream = viewer_stream_find_by_id(be64toh(request_index.stream_id)); + if (!vstream) { ret = -1; goto end_unlock; } - vstream = viewer_stream_find_by_id(be64toh(request_index.stream_id)); - if (!vstream) { + session = session_find_by_id(conn->sessions_ht, vstream->session_id); + if (!session) { ret = -1; goto end_unlock; } @@ -1056,7 +1104,7 @@ int viewer_get_next_index(struct relay_connection *conn) * The viewer should not ask for index on metadata stream. */ if (vstream->metadata_flag) { - viewer_index.status = htobe32(VIEWER_INDEX_HUP); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); goto send_reply; } @@ -1069,10 +1117,10 @@ int viewer_get_next_index(struct relay_connection *conn) * The index is created only when the first data packet arrives, it * might not be ready at the beginning of the session */ - viewer_index.status = htobe32(VIEWER_INDEX_RETRY); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); goto send_reply; } else if (ret < 0) { - viewer_index.status = htobe32(VIEWER_INDEX_ERR); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); goto send_reply; } vstream->index_read_fd = ret; @@ -1089,7 +1137,7 @@ int viewer_get_next_index(struct relay_connection *conn) if (ret < 0) { goto end_unlock; } else if (ret == 1) { - viewer_index.status = htobe32(VIEWER_INDEX_HUP); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); viewer_stream_delete(vstream); viewer_stream_destroy(ctf_trace, vstream); goto send_reply; @@ -1101,7 +1149,7 @@ int viewer_get_next_index(struct relay_connection *conn) if (rstream->tracefile_count_current == vstream->tracefile_count_current) { if (rstream->beacon_ts_end != -1ULL && vstream->last_sent_index == rstream->total_index_received) { - viewer_index.status = htobe32(VIEWER_INDEX_INACTIVE); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); viewer_index.timestamp_end = htobe64(rstream->beacon_ts_end); pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); goto send_reply; @@ -1114,7 +1162,7 @@ int viewer_get_next_index(struct relay_connection *conn) */ pthread_mutex_unlock(&rstream->viewer_stream_rotation_lock); /* No new index to send, retry later. */ - viewer_index.status = htobe32(VIEWER_INDEX_RETRY); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); goto send_reply; } } @@ -1122,7 +1170,7 @@ int viewer_get_next_index(struct relay_connection *conn) } else if (rstream->close_flag && vstream->close_write_flag && vstream->total_index_received == vstream->last_sent_index) { /* Last index sent and current tracefile closed in write */ - viewer_index.status = htobe32(VIEWER_INDEX_HUP); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); viewer_stream_delete(vstream); viewer_stream_destroy(ctf_trace, vstream); goto send_reply; @@ -1147,13 +1195,13 @@ int viewer_get_next_index(struct relay_connection *conn) /* * The file is being overwritten by the writer, we cannot * use it. */ - viewer_index.status = htobe32(VIEWER_INDEX_RETRY); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); pthread_mutex_unlock(&vstream->overwrite_lock); ret = viewer_stream_rotate(vstream, rstream); if (ret < 0) { goto end_unlock; } else if (ret == 1) { - viewer_index.status = htobe32(VIEWER_INDEX_HUP); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); viewer_stream_delete(vstream); viewer_stream_destroy(ctf_trace, vstream); goto send_reply; @@ -1169,24 +1217,24 @@ int viewer_get_next_index(struct relay_connection *conn) * The tracefile is closed in write, so we read up to EOF. */ if (vstream->close_write_flag == 1) { - viewer_index.status = htobe32(VIEWER_INDEX_RETRY); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); /* Rotate on normal EOF */ ret = viewer_stream_rotate(vstream, rstream); if (ret < 0) { goto end_unlock; } else if (ret == 1) { - viewer_index.status = htobe32(VIEWER_INDEX_HUP); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); viewer_stream_delete(vstream); viewer_stream_destroy(ctf_trace, vstream); goto send_reply; } } else { PERROR("Relay reading index file %d", vstream->index_read_fd); - viewer_index.status = htobe32(VIEWER_INDEX_ERR); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); } goto send_reply; } else { - viewer_index.status = htobe32(VIEWER_INDEX_OK); + viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); vstream->last_sent_index++; } @@ -1236,6 +1284,7 @@ int viewer_get_packet(struct relay_connection *conn) struct lttng_viewer_get_packet get_packet_info; struct lttng_viewer_trace_packet reply; struct relay_viewer_stream *stream; + struct relay_session *session; struct ctf_trace *ctf_trace; assert(conn); @@ -1259,7 +1308,13 @@ int viewer_get_packet(struct relay_connection *conn) goto error; } - ctf_trace = ctf_trace_find_by_path(conn->session->ctf_traces_ht, + session = session_find_by_id(conn->sessions_ht, stream->session_id); + if (!session) { + ret = -1; + goto error; + } + + ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, stream->path_name); assert(ctf_trace); @@ -1292,7 +1347,7 @@ int viewer_get_packet(struct relay_connection *conn) if (!ctf_trace->metadata_received || ctf_trace->metadata_received > ctf_trace->metadata_sent) { - reply.status = htobe32(VIEWER_GET_PACKET_ERR); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); reply.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; goto send_reply; } @@ -1301,7 +1356,7 @@ int viewer_get_packet(struct relay_connection *conn) if (ret < 0) { goto end_unlock; } else if (ret == 1) { - reply.status = htobe32(VIEWER_GET_PACKET_ERR); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); reply.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; goto send_reply; } @@ -1323,7 +1378,7 @@ int viewer_get_packet(struct relay_connection *conn) PERROR("lseek"); goto error; } - reply.status = htobe32(VIEWER_GET_PACKET_EOF); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); goto send_reply; } read_len = lttng_read(stream->read_fd, data, len); @@ -1338,17 +1393,17 @@ int viewer_get_packet(struct relay_connection *conn) be64toh(get_packet_info.offset)); goto error; } else { - reply.status = htobe32(VIEWER_GET_PACKET_EOF); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_EOF); goto send_reply; } } - reply.status = htobe32(VIEWER_GET_PACKET_OK); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); reply.len = htobe32(len); send_data = 1; goto send_reply; error: - reply.status = htobe32(VIEWER_GET_PACKET_ERR); + reply.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); send_reply: reply.flags = htobe32(reply.flags); @@ -1397,6 +1452,7 @@ int viewer_get_metadata(struct relay_connection *conn) struct lttng_viewer_metadata_packet reply; struct relay_viewer_stream *stream; struct ctf_trace *ctf_trace; + struct relay_session *session; assert(conn); @@ -1417,14 +1473,20 @@ int viewer_get_metadata(struct relay_connection *conn) goto error; } - ctf_trace = ctf_trace_find_by_path(conn->session->ctf_traces_ht, + session = session_find_by_id(conn->sessions_ht, stream->session_id); + if (!session) { + ret = -1; + goto error; + } + + ctf_trace = ctf_trace_find_by_path(session->ctf_traces_ht, stream->path_name); assert(ctf_trace); assert(ctf_trace->metadata_sent <= ctf_trace->metadata_received); len = ctf_trace->metadata_received - ctf_trace->metadata_sent; if (len == 0) { - reply.status = htobe32(VIEWER_NO_NEW_METADATA); + reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); goto send_reply; } @@ -1458,11 +1520,11 @@ int viewer_get_metadata(struct relay_connection *conn) goto error; } ctf_trace->metadata_sent += read_len; - reply.status = htobe32(VIEWER_METADATA_OK); + reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); goto send_reply; error: - reply.status = htobe32(VIEWER_METADATA_ERR); + reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); send_reply: health_code_update(); @@ -1491,6 +1553,42 @@ end: return ret; } +/* + * Create a viewer session. + * + * Return 0 on success or else a negative value. + */ +static +int viewer_create_session(struct relay_connection *conn) +{ + int ret; + struct lttng_viewer_create_session_response resp; + + DBG("Viewer create session received"); + + resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); + conn->viewer_session = zmalloc(sizeof(conn->viewer_session)); + if (!conn->viewer_session) { + ERR("Allocation viewer session"); + resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); + goto send_reply; + } + CDS_INIT_LIST_HEAD(&conn->viewer_session->sessions_head); + +send_reply: + health_code_update(); + ret = send_response(conn->sock, &resp, sizeof(resp)); + if (ret < 0) { + goto end; + } + health_code_update(); + ret = 0; + +end: + return ret; +} + + /* * live_relay_unknown_command: send -1 if received unknown command */ @@ -1522,34 +1620,37 @@ int process_control(struct lttng_viewer_cmd *recv_hdr, * Make sure we've done the version check before any command other then a * new client connection. */ - if (msg_value != VIEWER_CONNECT && !conn->version_check_done) { + if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { ERR("Viewer conn value %" PRIu32 " before version check", msg_value); ret = -1; goto end; } switch (msg_value) { - case VIEWER_CONNECT: + case LTTNG_VIEWER_CONNECT: ret = viewer_connect(conn); break; - case VIEWER_LIST_SESSIONS: + case LTTNG_VIEWER_LIST_SESSIONS: ret = viewer_list_sessions(conn); break; - case VIEWER_ATTACH_SESSION: + case LTTNG_VIEWER_ATTACH_SESSION: ret = viewer_attach_session(conn); break; - case VIEWER_GET_NEXT_INDEX: + case LTTNG_VIEWER_GET_NEXT_INDEX: ret = viewer_get_next_index(conn); break; - case VIEWER_GET_PACKET: + case LTTNG_VIEWER_GET_PACKET: ret = viewer_get_packet(conn); break; - case VIEWER_GET_METADATA: + case LTTNG_VIEWER_GET_METADATA: ret = viewer_get_metadata(conn); break; - case VIEWER_GET_NEW_STREAMS: + case LTTNG_VIEWER_GET_NEW_STREAMS: ret = viewer_get_new_streams(conn); break; + case LTTNG_VIEWER_CREATE_SESSION: + ret = viewer_create_session(conn); + break; default: ERR("Received unknown viewer command (%u)", be32toh(recv_hdr->cmd)); live_relay_unknown_command(conn); @@ -1634,28 +1735,34 @@ static void try_destroy_streams(struct relay_session *session) static void destroy_connection(struct lttng_ht *relay_connections_ht, struct relay_connection *conn) { - struct relay_session *session; + struct relay_session *session, *tmp_session; assert(relay_connections_ht); assert(conn); - DBG("Cleaning connection of session ID %" PRIu64, conn->session_id); - connection_delete(relay_connections_ht, conn); + if (!conn->viewer_session) { + goto end; + } + rcu_read_lock(); - session = session_find_by_id(conn->sessions_ht, conn->session_id); - if (session) { + cds_list_for_each_entry_safe(session, tmp_session, + &conn->viewer_session->sessions_head, + viewer_session_list) { + DBG("Cleaning connection of session ID %" PRIu64, session->id); /* * Very important that this is done before destroying the session so we * can put back every viewer stream reference from the ctf_trace. */ destroy_viewer_streams_by_session(session); try_destroy_streams(session); + cds_list_del(&session->viewer_session_list); session_viewer_try_destroy(conn->sessions_ht, session); } rcu_read_unlock(); +end: connection_destroy(conn); }