X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-relayd%2Fmain.c;h=43e6f318aef9eec57daecb9a6106f4b314c9296b;hp=bb038a670b0a763afd41b1343cbbb1e919fbe1f7;hb=d3e2ba59faddb31870e2ce29b6a881f7ad5ad883;hpb=309167d2a6f59d0c8cbf64eb23ba912cdea76a34 diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c index bb038a670..43e6f318a 100644 --- a/src/bin/lttng-relayd/main.c +++ b/src/bin/lttng-relayd/main.c @@ -52,17 +52,20 @@ #include #include "cmd.h" +#include "ctf-trace.h" +#include "index.h" #include "utils.h" #include "lttng-relayd.h" +#include "live.h" /* command line options */ char *opt_output_path; static int opt_daemon; static struct lttng_uri *control_uri; static struct lttng_uri *data_uri; +static struct lttng_uri *live_uri; const char *progname; -static int is_root; /* Set to 1 if the daemon is running as root */ /* * Quit pipe for all threads. This permits a single cancellation point @@ -98,6 +101,16 @@ static struct relay_cmd_queue relay_cmd_queue; static char *data_buffer; static unsigned int data_buffer_size; +/* Global hash table that stores relay index object. */ +static struct lttng_ht *indexes_ht; + +/* We need those values for the file/dir creation. */ +static uid_t relayd_uid; +static gid_t relayd_gid; + +/* Global relay stream hash table. */ +struct lttng_ht *relay_streams_ht; + /* * usage function on stderr */ @@ -221,6 +234,21 @@ int parse_args(int argc, char **argv) goto exit; } } + if (live_uri == NULL) { + ret = asprintf(&default_address, "tcp://0.0.0.0:%d", + DEFAULT_NETWORK_VIEWER_PORT); + if (ret < 0) { + PERROR("asprintf default viewer control address"); + goto exit; + } + + ret = uri_parse(default_address, &live_uri); + free(default_address); + if (ret < 0) { + ERR("Invalid viewer control URI specified"); + goto exit; + } + } exit: return ret; @@ -690,15 +718,13 @@ error: * Get stream from stream id. * Need to be called with RCU read-side lock held. */ -static -struct relay_stream *relay_stream_from_stream_id(uint64_t stream_id, - struct lttng_ht *streams_ht) +struct relay_stream *relay_stream_find_by_id(uint64_t stream_id) { struct lttng_ht_node_ulong *node; struct lttng_ht_iter iter; struct relay_stream *ret; - lttng_ht_lookup(streams_ht, + lttng_ht_lookup(relay_streams_ht, (void *)((unsigned long) stream_id), &iter); node = lttng_ht_iter_get_node_ulong(&iter); @@ -719,17 +745,29 @@ void deferred_free_stream(struct rcu_head *head) { struct relay_stream *stream = caa_container_of(head, struct relay_stream, rcu_node); + + ctf_trace_try_destroy(stream->ctf_trace); + free(stream->path_name); free(stream->channel_name); free(stream); } +static +void deferred_free_session(struct rcu_head *head) +{ + struct relay_session *session = + caa_container_of(head, struct relay_session, rcu_node); + free(session); +} + /* * relay_delete_session: Free all memory associated with a session and * close all the FDs */ static -void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht) +void relay_delete_session(struct relay_command *cmd, + struct lttng_ht *sessions_ht) { struct lttng_ht_iter iter; struct lttng_ht_node_ulong *node; @@ -743,7 +781,7 @@ void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht DBG("Relay deleting session %" PRIu64, cmd->session->id); rcu_read_lock(); - cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, node, node) { + cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, node, node) { node = lttng_ht_iter_get_node_ulong(&iter); if (node) { stream = caa_container_of(node, @@ -753,16 +791,44 @@ void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht if (ret < 0) { PERROR("close stream fd on delete session"); } - ret = lttng_ht_del(streams_ht, &iter); + ret = lttng_ht_del(relay_streams_ht, &iter); assert(!ret); call_rcu(&stream->rcu_node, deferred_free_stream); } + /* Cleanup index of that stream. */ + relay_index_destroy_by_stream_id(stream->stream_handle, + indexes_ht); } } + iter.iter.node = &cmd->session->session_n.node; + ret = lttng_ht_del(sessions_ht, &iter); + assert(!ret); + call_rcu(&cmd->session->rcu_node, + deferred_free_session); rcu_read_unlock(); +} - free(cmd->session); +/* + * Copy index data from the control port to a given index object. + */ +static void copy_index_control_data(struct relay_index *index, + struct lttcomm_relayd_index *data) +{ + assert(index); + assert(data); + + /* + * The index on disk is encoded in big endian, so we don't need to convert + * the data received on the network. The data_offset value is NEVER + * modified here and is updated by the data thread. + */ + index->index_data.packet_size = data->packet_size; + index->index_data.content_size = data->content_size; + index->index_data.timestamp_begin = data->timestamp_begin; + index->index_data.timestamp_end = data->timestamp_end; + index->index_data.events_discarded = data->events_discarded; + index->index_data.stream_id = data->stream_id; } /* @@ -772,7 +838,8 @@ void relay_delete_session(struct relay_command *cmd, struct lttng_ht *streams_ht */ static int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd) + struct relay_command *cmd, + struct lttng_ht *sessions_ht) { int ret = 0, send_ret; struct relay_session *session; @@ -796,6 +863,18 @@ int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr, reply.session_id = htobe64(session->id); + switch (cmd->minor) { + case 4: /* LTTng sessiond 2.4 */ + default: + ret = cmd_create_session_2_4(cmd, session); + break; + } + + lttng_ht_node_init_ulong(&session->session_n, + (unsigned long) session->id); + lttng_ht_add_unique_ulong(sessions_ht, + &session->session_n); + DBG("Created session %" PRIu64, session->id); error: @@ -819,7 +898,7 @@ error: */ static int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd, struct lttng_ht *sessions_ht) { struct relay_session *session = cmd->session; struct relay_stream *stream = NULL; @@ -856,6 +935,10 @@ int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, stream->stream_handle = ++last_relay_stream_id; stream->prev_seq = -1ULL; stream->session = session; + stream->index_fd = -1; + stream->read_index_fd = -1; + stream->ctf_trace = NULL; + pthread_mutex_init(&stream->lock, NULL); ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG); if (ret < 0) { @@ -868,7 +951,7 @@ int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, * uses its own credentials for the stream files. */ ret = utils_create_stream_file(stream->path_name, stream->channel_name, - stream->tracefile_size, 0, -1, -1, NULL); + stream->tracefile_size, 0, relayd_uid, relayd_gid, NULL); if (ret < 0) { ERR("Create output file"); goto end; @@ -880,12 +963,37 @@ int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr, DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name); } + if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) { + stream->metadata_flag = 1; + /* + * When we receive a new metadata stream, we create a new + * ctf_trace and we assign this ctf_trace to all streams with + * the same path. + * + * If later on we receive a new stream for the same ctf_trace, + * we copy the information from the first hit in the HT to the + * new stream. + */ + stream->ctf_trace = ctf_trace_create(); + if (!stream->ctf_trace) { + ret = -1; + goto end; + } + stream->ctf_trace->refcount++; + stream->ctf_trace->metadata_stream = stream; + } + ctf_trace_assign(cmd->ctf_traces_ht, stream); + lttng_ht_node_init_ulong(&stream->stream_n, (unsigned long) stream->stream_handle); - lttng_ht_add_unique_ulong(streams_ht, + lttng_ht_add_unique_ulong(relay_streams_ht, &stream->stream_n); - DBG("Relay new stream added %s", stream->channel_name); + lttng_ht_node_init_str(&stream->ctf_trace_node, stream->path_name); + lttng_ht_add_str(cmd->ctf_traces_ht, &stream->ctf_trace_node); + + DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name, + stream->stream_handle); end: reply.handle = htobe64(stream->stream_handle); @@ -921,7 +1029,7 @@ err_free_stream: */ static int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd, struct lttng_ht *viewer_streams_ht) { struct relay_session *session = cmd->session; struct lttcomm_relayd_close_stream stream_info; @@ -952,8 +1060,7 @@ int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, } rcu_read_lock(); - stream = relay_stream_from_stream_id(be64toh(stream_info.stream_id), - streams_ht); + stream = relay_stream_find_by_id(be64toh(stream_info.stream_id)); if (!stream) { ret = -1; goto end_unlock; @@ -964,13 +1071,37 @@ int relay_close_stream(struct lttcomm_relayd_hdr *recv_hdr, if (close_stream_check(stream)) { int delret; + struct relay_viewer_stream *vstream; delret = close(stream->fd); if (delret < 0) { PERROR("close stream"); } + + if (stream->index_fd >= 0) { + delret = close(stream->index_fd); + if (delret < 0) { + PERROR("close stream index_fd"); + } + } + + vstream = live_find_viewer_stream_by_id(stream->stream_handle, + viewer_streams_ht); + if (vstream) { + /* + * Set the last good value into the viewer stream. This is done + * right before the stream gets deleted from the hash table. The + * lookup failure on the live thread side of a stream indicates + * that the viewer stream index received value should be used. + */ + vstream->total_index_received = stream->total_index_received; + } + iter.iter.node = &stream->stream_n.node; - delret = lttng_ht_del(streams_ht, &iter); + delret = lttng_ht_del(relay_streams_ht, &iter); + assert(!delret); + iter.iter.node = &stream->ctf_trace_node.node; + delret = lttng_ht_del(cmd->ctf_traces_ht, &iter); assert(!delret); call_rcu(&stream->rcu_node, deferred_free_stream); @@ -1077,7 +1208,7 @@ end: */ static int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd) { int ret = htobe32(LTTNG_OK); struct relay_session *session = cmd->session; @@ -1129,8 +1260,8 @@ int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, metadata_struct = (struct lttcomm_relayd_metadata_payload *) data_buffer; rcu_read_lock(); - metadata_stream = relay_stream_from_stream_id( - be64toh(metadata_struct->stream_id), streams_ht); + metadata_stream = relay_stream_find_by_id( + be64toh(metadata_struct->stream_id)); if (!metadata_stream) { ret = -1; goto end_unlock; @@ -1151,6 +1282,8 @@ int relay_recv_metadata(struct lttcomm_relayd_hdr *recv_hdr, if (ret < 0) { goto end_unlock; } + metadata_stream->ctf_trace->metadata_received += + payload_size + be32toh(metadata_struct->padding_size); DBG2("Relay metadata written"); @@ -1165,7 +1298,7 @@ end: */ static int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd, struct lttng_ht *sessions_ht) { int ret; struct lttcomm_relayd_version reply, msg; @@ -1194,7 +1327,7 @@ int relay_send_version(struct lttcomm_relayd_hdr *recv_hdr, if (reply.major != be32toh(msg.major)) { DBG("Incompatible major versions (%u vs %u), deleting session", reply.major, be32toh(msg.major)); - relay_delete_session(cmd, streams_ht); + relay_delete_session(cmd, sessions_ht); ret = 0; goto end; } @@ -1227,7 +1360,7 @@ end: */ static int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd) { struct relay_session *session = cmd->session; struct lttcomm_relayd_data_pending msg; @@ -1261,7 +1394,7 @@ int relay_data_pending(struct lttcomm_relayd_hdr *recv_hdr, last_net_seq_num = be64toh(msg.last_net_seq_num); rcu_read_lock(); - stream = relay_stream_from_stream_id(stream_id, streams_ht); + stream = relay_stream_find_by_id(stream_id); if (stream == NULL) { ret = -1; goto end_unlock; @@ -1305,7 +1438,7 @@ end_no_session: */ static int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd) { int ret; uint64_t stream_id; @@ -1338,7 +1471,8 @@ int relay_quiescent_control(struct lttcomm_relayd_hdr *recv_hdr, stream_id = be64toh(msg.stream_id); rcu_read_lock(); - cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { + cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, + stream_n.node) { if (stream->stream_handle == stream_id) { stream->data_pending_check_done = 1; DBG("Relay quiescent control pending flag set to %" PRIu64, @@ -1367,7 +1501,7 @@ end_no_session: */ static int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd) { int ret; struct lttng_ht_iter iter; @@ -1378,7 +1512,6 @@ int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, assert(recv_hdr); assert(cmd); - assert(streams_ht); DBG("Init streams for data pending"); @@ -1409,7 +1542,8 @@ int relay_begin_data_pending(struct lttcomm_relayd_hdr *recv_hdr, * streams to find the one associated with the right session_id. */ rcu_read_lock(); - cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { + cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, + stream_n.node) { if (stream->session->id == session_id) { stream->data_pending_check_done = 0; DBG("Set begin data pending flag to stream %" PRIu64, @@ -1441,7 +1575,7 @@ end_no_session: */ static int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd) { int ret; struct lttng_ht_iter iter; @@ -1453,7 +1587,6 @@ int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, assert(recv_hdr); assert(cmd); - assert(streams_ht); DBG("End data pending command"); @@ -1480,7 +1613,8 @@ int relay_end_data_pending(struct lttcomm_relayd_hdr *recv_hdr, /* Iterate over all streams to see if the begin data pending flag is set. */ rcu_read_lock(); - cds_lfht_for_each_entry(streams_ht->ht, &iter.iter, stream, stream_n.node) { + cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream, + stream_n.node) { if (stream->session->id == session_id && !stream->data_pending_check_done) { is_data_inflight = 1; @@ -1504,44 +1638,179 @@ end_no_session: } /* - * relay_process_control: Process the commands received on the control socket + * Receive an index for a specific stream. + * + * Return 0 on success else a negative value. + */ +static +int relay_recv_index(struct lttcomm_relayd_hdr *recv_hdr, + struct relay_command *cmd, struct lttng_ht *indexes_ht) +{ + int ret, send_ret, index_created = 0; + struct relay_session *session = cmd->session; + struct lttcomm_relayd_index index_info; + struct relay_index *index, *wr_index = NULL; + struct lttcomm_relayd_generic_reply reply; + struct relay_stream *stream; + uint64_t net_seq_num; + + assert(cmd); + assert(indexes_ht); + + DBG("Relay receiving index"); + + if (!session || cmd->version_check_done == 0) { + ERR("Trying to close a stream before version check"); + ret = -1; + goto end_no_session; + } + + ret = cmd->sock->ops->recvmsg(cmd->sock, &index_info, + sizeof(index_info), 0); + if (ret < sizeof(index_info)) { + if (ret == 0) { + /* Orderly shutdown. Not necessary to print an error. */ + DBG("Socket %d did an orderly shutdown", cmd->sock->fd); + } else { + ERR("Relay didn't receive valid index struct size : %d", ret); + } + ret = -1; + goto end_no_session; + } + + net_seq_num = be64toh(index_info.net_seq_num); + + rcu_read_lock(); + stream = relay_stream_find_by_id(be64toh(index_info.relay_stream_id)); + if (!stream) { + ret = -1; + goto end_rcu_unlock; + } + + /* Live beacon handling */ + if (index_info.packet_size == 0) { + DBG("Received live beacon for stream %" PRIu64, stream->stream_handle); + + /* + * Only flag a stream inactive when it has already received data. + */ + if (stream->total_index_received > 0) { + stream->beacon_ts_end = be64toh(index_info.timestamp_end); + } + ret = 0; + goto end_rcu_unlock; + } else { + stream->beacon_ts_end = -1ULL; + } + + index = relay_index_find(stream->stream_handle, net_seq_num, indexes_ht); + if (!index) { + /* A successful creation will add the object to the HT. */ + index = relay_index_create(stream->stream_handle, net_seq_num); + if (!index) { + goto end_rcu_unlock; + } + index_created = 1; + } + + copy_index_control_data(index, &index_info); + + if (index_created) { + /* + * Try to add the relay index object to the hash table. If an object + * already exist, destroy back the index created, set the data in this + * object and write it on disk. + */ + relay_index_add(index, indexes_ht, &wr_index); + if (wr_index) { + copy_index_control_data(wr_index, &index_info); + free(index); + } + } else { + /* The index already exists so write it on disk. */ + wr_index = index; + } + + /* Do we have a writable ready index to write on disk. */ + if (wr_index) { + /* Starting at 2.4, create the index file if none available. */ + if (cmd->minor >= 4 && stream->index_fd < 0) { + ret = index_create_file(stream->path_name, stream->channel_name, + relayd_uid, relayd_gid, stream->tracefile_size, + stream->tracefile_count_current); + if (ret < 0) { + goto end_rcu_unlock; + } + stream->index_fd = ret; + } + + ret = relay_index_write(wr_index->fd, wr_index, indexes_ht); + if (ret < 0) { + goto end_rcu_unlock; + } + stream->total_index_received++; + } + +end_rcu_unlock: + rcu_read_unlock(); + + if (ret < 0) { + reply.ret_code = htobe32(LTTNG_ERR_UNK); + } else { + reply.ret_code = htobe32(LTTNG_OK); + } + send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0); + if (send_ret < 0) { + ERR("Relay sending close index id reply"); + ret = send_ret; + } + +end_no_session: + return ret; +} + +/* + * Process the commands received on the control socket */ static int relay_process_control(struct lttcomm_relayd_hdr *recv_hdr, - struct relay_command *cmd, struct lttng_ht *streams_ht) + struct relay_command *cmd, struct relay_local_data *ctx) { int ret = 0; switch (be32toh(recv_hdr->cmd)) { case RELAYD_CREATE_SESSION: - ret = relay_create_session(recv_hdr, cmd); + ret = relay_create_session(recv_hdr, cmd, ctx->sessions_ht); break; case RELAYD_ADD_STREAM: - ret = relay_add_stream(recv_hdr, cmd, streams_ht); + ret = relay_add_stream(recv_hdr, cmd, ctx->sessions_ht); break; case RELAYD_START_DATA: ret = relay_start(recv_hdr, cmd); break; case RELAYD_SEND_METADATA: - ret = relay_recv_metadata(recv_hdr, cmd, streams_ht); + ret = relay_recv_metadata(recv_hdr, cmd); break; case RELAYD_VERSION: - ret = relay_send_version(recv_hdr, cmd, streams_ht); + ret = relay_send_version(recv_hdr, cmd, ctx->sessions_ht); break; case RELAYD_CLOSE_STREAM: - ret = relay_close_stream(recv_hdr, cmd, streams_ht); + ret = relay_close_stream(recv_hdr, cmd, ctx->viewer_streams_ht); break; case RELAYD_DATA_PENDING: - ret = relay_data_pending(recv_hdr, cmd, streams_ht); + ret = relay_data_pending(recv_hdr, cmd); break; case RELAYD_QUIESCENT_CONTROL: - ret = relay_quiescent_control(recv_hdr, cmd, streams_ht); + ret = relay_quiescent_control(recv_hdr, cmd); break; case RELAYD_BEGIN_DATA_PENDING: - ret = relay_begin_data_pending(recv_hdr, cmd, streams_ht); + ret = relay_begin_data_pending(recv_hdr, cmd); break; case RELAYD_END_DATA_PENDING: - ret = relay_end_data_pending(recv_hdr, cmd, streams_ht); + ret = relay_end_data_pending(recv_hdr, cmd); + break; + case RELAYD_SEND_INDEX: + ret = relay_recv_index(recv_hdr, cmd, indexes_ht); break; case RELAYD_UPDATE_SYNC_INFO: default: @@ -1559,12 +1828,14 @@ end: * relay_process_data: Process the data received on the data socket */ static -int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) +int relay_process_data(struct relay_command *cmd, + struct lttng_ht *indexes_ht) { - int ret = 0; + int ret = 0, rotate_index = 0, index_created = 0; struct relay_stream *stream; + struct relay_index *index, *wr_index = NULL; struct lttcomm_relayd_data_hdr data_hdr; - uint64_t stream_id; + uint64_t stream_id, data_offset; uint64_t net_seq_num; uint32_t data_size; @@ -1584,10 +1855,10 @@ int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) stream_id = be64toh(data_hdr.stream_id); rcu_read_lock(); - stream = relay_stream_from_stream_id(stream_id, streams_ht); + stream = relay_stream_find_by_id(stream_id); if (!stream) { ret = -1; - goto end_unlock; + goto end_rcu_unlock; } data_size = be32toh(data_hdr.data_size); @@ -1599,7 +1870,7 @@ int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) ERR("Allocating data buffer"); free(data_buffer); ret = -1; - goto end_unlock; + goto end_rcu_unlock; } data_buffer = tmp_data_ptr; data_buffer_size = data_size; @@ -1617,33 +1888,104 @@ int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) DBG("Socket %d did an orderly shutdown", cmd->sock->fd); } ret = -1; - goto end_unlock; + goto end_rcu_unlock; } + /* Check if a rotation is needed. */ if (stream->tracefile_size > 0 && (stream->tracefile_size_current + data_size) > stream->tracefile_size) { - ret = utils_rotate_stream_file(stream->path_name, - stream->channel_name, stream->tracefile_size, - stream->tracefile_count, -1, -1, - stream->fd, &(stream->tracefile_count_current), - &stream->fd); + ret = utils_rotate_stream_file(stream->path_name, stream->channel_name, + stream->tracefile_size, stream->tracefile_count, + relayd_uid, relayd_gid, stream->fd, + &(stream->tracefile_count_current), &stream->fd); if (ret < 0) { - ERR("Rotating output file"); - goto end; + ERR("Rotating stream output file"); + goto end_rcu_unlock; } - stream->fd = ret; /* Reset current size because we just perform a stream rotation. */ stream->tracefile_size_current = 0; + rotate_index = 1; + } + + /* Get data offset because we are about to update the index. */ + data_offset = htobe64(stream->tracefile_size_current); + + /* + * Lookup for an existing index for that stream id/sequence number. If on + * exists, the control thread already received the data for it thus we need + * to write it on disk. + */ + index = relay_index_find(stream_id, net_seq_num, indexes_ht); + if (!index) { + /* A successful creation will add the object to the HT. */ + index = relay_index_create(stream->stream_handle, net_seq_num); + if (!index) { + goto end_rcu_unlock; + } + index_created = 1; } - stream->tracefile_size_current += data_size; + + if (rotate_index || stream->index_fd < 0) { + index->to_close_fd = stream->index_fd; + ret = index_create_file(stream->path_name, stream->channel_name, + relayd_uid, relayd_gid, stream->tracefile_size, + stream->tracefile_count_current); + if (ret < 0) { + /* This will close the stream's index fd if one. */ + relay_index_free_safe(index); + goto end_rcu_unlock; + } + stream->index_fd = ret; + } + index->fd = stream->index_fd; + index->index_data.offset = data_offset; + + if (index_created) { + /* + * Try to add the relay index object to the hash table. If an object + * already exist, destroy back the index created and set the data. + */ + relay_index_add(index, indexes_ht, &wr_index); + if (wr_index) { + /* Copy back data from the created index. */ + wr_index->fd = index->fd; + wr_index->to_close_fd = index->to_close_fd; + wr_index->index_data.offset = data_offset; + free(index); + } + } else { + /* The index already exists so write it on disk. */ + wr_index = index; + } + + /* Do we have a writable ready index to write on disk. */ + if (wr_index) { + /* Starting at 2.4, create the index file if none available. */ + if (cmd->minor >= 4 && stream->index_fd < 0) { + ret = index_create_file(stream->path_name, stream->channel_name, + relayd_uid, relayd_gid, stream->tracefile_size, + stream->tracefile_count_current); + if (ret < 0) { + goto end_rcu_unlock; + } + stream->index_fd = ret; + } + + ret = relay_index_write(wr_index->fd, wr_index, indexes_ht); + if (ret < 0) { + goto end_rcu_unlock; + } + stream->total_index_received++; + } + do { ret = write(stream->fd, data_buffer, data_size); } while (ret < 0 && errno == EINTR); if (ret < 0 || ret != data_size) { ERR("Relay error writing data to file"); ret = -1; - goto end_unlock; + goto end_rcu_unlock; } DBG2("Relay wrote %d bytes to tracefile for stream id %" PRIu64, @@ -1651,8 +1993,9 @@ int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) ret = write_padding_to_file(stream->fd, be32toh(data_hdr.padding_size)); if (ret < 0) { - goto end_unlock; + goto end_rcu_unlock; } + stream->tracefile_size_current += data_size + be32toh(data_hdr.padding_size); stream->prev_seq = net_seq_num; @@ -1665,15 +2008,20 @@ int relay_process_data(struct relay_command *cmd, struct lttng_ht *streams_ht) if (cret < 0) { PERROR("close stream process data"); } + + cret = close(stream->index_fd); + if (cret < 0) { + PERROR("close stream index_fd"); + } iter.iter.node = &stream->stream_n.node; - ret = lttng_ht_del(streams_ht, &iter); + ret = lttng_ht_del(relay_streams_ht, &iter); assert(!ret); call_rcu(&stream->rcu_node, deferred_free_stream); DBG("Closed tracefile %d after recv data", stream->fd); } -end_unlock: +end_rcu_unlock: rcu_read_unlock(); end: return ret; @@ -1712,6 +2060,11 @@ int relay_add_connection(int fd, struct lttng_poll_event *events, goto error_read; } + relay_connection->ctf_traces_ht = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); + if (!relay_connection->ctf_traces_ht) { + goto error_read; + } + lttng_ht_node_init_ulong(&relay_connection->sock_n, (unsigned long) relay_connection->sock->fd); rcu_read_lock(); @@ -1734,21 +2087,22 @@ void deferred_free_connection(struct rcu_head *head) struct relay_command *relay_connection = caa_container_of(head, struct relay_command, rcu_node); + lttng_ht_destroy(relay_connection->ctf_traces_ht); lttcomm_destroy_sock(relay_connection->sock); free(relay_connection); } static void relay_del_connection(struct lttng_ht *relay_connections_ht, - struct lttng_ht *streams_ht, struct lttng_ht_iter *iter, - struct relay_command *relay_connection) + struct lttng_ht_iter *iter, struct relay_command *relay_connection, + struct lttng_ht *sessions_ht) { int ret; ret = lttng_ht_del(relay_connections_ht, iter); assert(!ret); if (relay_connection->type == RELAY_CONTROL) { - relay_delete_session(relay_connection, streams_ht); + relay_delete_session(relay_connection, sessions_ht); } call_rcu(&relay_connection->rcu_node, @@ -1768,8 +2122,9 @@ void *relay_thread_worker(void *data) struct lttng_ht *relay_connections_ht; struct lttng_ht_node_ulong *node; struct lttng_ht_iter iter; - struct lttng_ht *streams_ht; struct lttcomm_relayd_hdr recv_hdr; + struct relay_local_data *relay_ctx = (struct relay_local_data *) data; + struct lttng_ht *sessions_ht = relay_ctx->sessions_ht; DBG("[thread] Relay worker started"); @@ -1781,10 +2136,10 @@ void *relay_thread_worker(void *data) goto relay_connections_ht_error; } - /* tables of streams indexed by stream ID */ - streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); - if (!streams_ht) { - goto streams_ht_error; + /* Tables of received indexes indexed by index handle and net_seq_num. */ + indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_TWO_U64); + if (!indexes_ht) { + goto indexes_ht_error; } ret = create_thread_poll_set(&events, 2); @@ -1864,8 +2219,7 @@ restart: ERR("POLL ERROR"); relay_cleanup_poll_connection(&events, pollfd); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); if (last_seen_data_fd == pollfd) { last_seen_data_fd = last_notdel_data_fd; } @@ -1873,8 +2227,7 @@ restart: DBG("Socket %d hung up", pollfd); relay_cleanup_poll_connection(&events, pollfd); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); if (last_seen_data_fd == pollfd) { last_seen_data_fd = last_notdel_data_fd; } @@ -1888,8 +2241,7 @@ restart: if (ret <= 0) { relay_cleanup_poll_connection(&events, pollfd); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); DBG("Control connection closed with %d", pollfd); } else { if (relay_connection->session) { @@ -1897,14 +2249,12 @@ restart: relay_connection->session->id); } ret = relay_process_control(&recv_hdr, - relay_connection, - streams_ht); + relay_connection, relay_ctx); if (ret < 0) { /* Clear the session on error. */ relay_cleanup_poll_connection(&events, pollfd); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); DBG("Connection closed with %d", pollfd); } seen_control = 1; @@ -1970,13 +2320,12 @@ restart: continue; } - ret = relay_process_data(relay_connection, streams_ht); + ret = relay_process_data(relay_connection, indexes_ht); /* connection closed */ if (ret < 0) { relay_cleanup_poll_connection(&events, pollfd); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); DBG("Data connection closed with %d", pollfd); /* * Every goto restart call sets the last seen fd where @@ -2008,14 +2357,13 @@ error: relay_connection = caa_container_of(node, struct relay_command, sock_n); relay_del_connection(relay_connections_ht, - streams_ht, &iter, - relay_connection); + &iter, relay_connection, sessions_ht); } } rcu_read_unlock(); error_poll_create: - lttng_ht_destroy(streams_ht); -streams_ht_error: + lttng_ht_destroy(indexes_ht); +indexes_ht_error: lttng_ht_destroy(relay_connections_ht); relay_connections_ht_error: /* Close relay cmd pipes */ @@ -2050,6 +2398,7 @@ int main(int argc, char **argv) { int ret = 0; void *status; + struct relay_local_data *relay_ctx; /* Create thread quit pipe */ if ((ret = init_thread_quit_pipe()) < 0) { @@ -2089,10 +2438,12 @@ int main(int argc, char **argv) } } - /* Check if daemon is UID = 0 */ - is_root = !getuid(); + /* We need those values for the file/dir creation. */ + relayd_uid = getuid(); + relayd_gid = getgid(); - if (!is_root) { + /* Check if daemon is UID = 0 */ + if (relayd_uid == 0) { if (control_uri->port < 1024 || data_uri->port < 1024) { ERR("Need to be root to use ports < 1024"); ret = -1; @@ -2114,6 +2465,30 @@ int main(int argc, char **argv) /* Initialize communication library */ lttcomm_init(); + relay_ctx = zmalloc(sizeof(struct relay_local_data)); + if (!relay_ctx) { + PERROR("relay_ctx"); + goto exit; + } + + /* tables of sessions indexed by session ID */ + relay_ctx->sessions_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); + if (!relay_ctx->sessions_ht) { + goto exit_relay_ctx_sessions; + } + + /* tables of streams indexed by stream ID */ + relay_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); + if (!relay_streams_ht) { + goto exit_relay_ctx_streams; + } + + /* tables of streams indexed by stream ID */ + relay_ctx->viewer_streams_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); + if (!relay_ctx->viewer_streams_ht) { + goto exit_relay_ctx_viewer_streams; + } + /* Setup the dispatcher thread */ ret = pthread_create(&dispatcher_thread, NULL, relay_thread_dispatcher, (void *) NULL); @@ -2124,7 +2499,7 @@ int main(int argc, char **argv) /* Setup the worker thread */ ret = pthread_create(&worker_thread, NULL, - relay_thread_worker, (void *) NULL); + relay_thread_worker, (void *) relay_ctx); if (ret != 0) { PERROR("pthread_create worker"); goto exit_worker; @@ -2138,6 +2513,11 @@ int main(int argc, char **argv) goto exit_listener; } + ret = live_start_threads(live_uri, relay_ctx); + if (ret != 0) { + ERR("Starting live viewer threads"); + } + exit_listener: ret = pthread_join(listener_thread, &status); if (ret != 0) { @@ -2158,8 +2538,19 @@ exit_dispatcher: PERROR("pthread_join"); goto error; /* join error, exit without cleanup */ } + lttng_ht_destroy(relay_ctx->viewer_streams_ht); + +exit_relay_ctx_viewer_streams: + lttng_ht_destroy(relay_streams_ht); + +exit_relay_ctx_streams: + lttng_ht_destroy(relay_ctx->sessions_ht); + +exit_relay_ctx_sessions: + free(relay_ctx); exit: + live_stop_threads(); cleanup(); if (!ret) { exit(EXIT_SUCCESS);