X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-consumer.c;h=a68c5d96dc99070304357d3a723b136191868ecc;hb=HEAD;hp=33cb6ff376c16c92db8bf605963054b364b59555;hpb=d88aee689d5bd0067f362a323cb69c37717df59f;p=lttng-tools.git diff --git a/src/bin/lttng-sessiond/ust-consumer.c b/src/bin/lttng-sessiond/ust-consumer.c deleted file mode 100644 index 33cb6ff37..000000000 --- a/src/bin/lttng-sessiond/ust-consumer.c +++ /dev/null @@ -1,514 +0,0 @@ -/* - * Copyright (C) 2011 - David Goulet - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#define _GNU_SOURCE -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "consumer.h" -#include "ust-consumer.h" - -/* - * Return allocated full pathname of the session using the consumer trace path - * and subdir if available. On a successful allocation, the directory of the - * trace is created with the session credentials. - * - * The caller can safely free(3) the returned value. On error, NULL is - * returned. - */ -static char *setup_trace_path(struct consumer_output *consumer, - struct ust_app_session *ua_sess) -{ - int ret; - char *pathname; - - assert(consumer); - assert(ua_sess); - - health_code_update(); - - /* Allocate our self the string to make sure we never exceed PATH_MAX. */ - pathname = zmalloc(PATH_MAX); - if (!pathname) { - goto error; - } - - /* Get correct path name destination */ - if (consumer->type == CONSUMER_DST_LOCAL) { - /* Set application path to the destination path */ - ret = snprintf(pathname, PATH_MAX, "%s/%s/%s", - consumer->dst.trace_path, consumer->subdir, ua_sess->path); - if (ret < 0) { - PERROR("snprintf channel path"); - goto error; - } - - /* Create directory. Ignore if exist. */ - ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, ua_sess->uid, - ua_sess->gid); - if (ret < 0) { - if (ret != -EEXIST) { - ERR("Trace directory creation error"); - goto error; - } - } - } else { - ret = snprintf(pathname, PATH_MAX, "%s/%s", consumer->subdir, - ua_sess->path); - if (ret < 0) { - PERROR("snprintf channel path"); - goto error; - } - } - - return pathname; - -error: - free(pathname); - return NULL; -} - -/* - * Send a single channel to the consumer using command ADD_CHANNEL. - * - * Consumer socket MUST be acquired before calling this. - */ -static int ask_channel_creation(struct ust_app_session *ua_sess, - struct ust_app_channel *ua_chan, struct consumer_output *consumer, - struct consumer_socket *socket) -{ - int ret; - uint64_t key; - char *pathname = NULL; - struct lttcomm_consumer_msg msg; - - assert(ua_sess); - assert(ua_chan); - assert(socket); - assert(consumer); - - DBG2("Asking UST consumer for channel"); - - /* Get and create full trace path of session. */ - pathname = setup_trace_path(consumer, ua_sess); - if (!pathname) { - ret = -1; - goto error; - } - - consumer_init_ask_channel_comm_msg(&msg, - ua_chan->attr.subbuf_size, - ua_chan->attr.num_subbuf, - ua_chan->attr.overwrite, - ua_chan->attr.switch_timer_interval, - ua_chan->attr.read_timer_interval, - (int) ua_chan->attr.output, - (int) ua_chan->attr.type, - ua_sess->id, - pathname, - ua_chan->name, - ua_sess->uid, - ua_sess->gid, - consumer->net_seq_index, - ua_chan->key, - ua_sess->registry.uuid); - - health_code_update(); - - ret = lttcomm_send_unix_sock(socket->fd, &msg, sizeof(msg)); - if (ret < 0) { - goto error; - } - - ret = consumer_recv_status_channel(socket, &key, - &ua_chan->expected_stream_count); - if (ret < 0) { - goto error; - } - /* Communication protocol error. */ - assert(key == ua_chan->key); - /* We need at least one where 1 stream for 1 cpu. */ - assert(ua_chan->expected_stream_count > 0); - - DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key, - ua_chan->expected_stream_count); - -error: - free(pathname); - health_code_update(); - return ret; -} - -/* - * Ask consumer to create a channel for a given session. - * - * Returns 0 on success else a negative value. - */ -int ust_consumer_ask_channel(struct ust_app_session *ua_sess, - struct ust_app_channel *ua_chan, struct consumer_output *consumer, - struct consumer_socket *socket) -{ - int ret; - - assert(ua_sess); - assert(ua_chan); - assert(consumer); - assert(socket); - assert(socket->fd >= 0); - - pthread_mutex_lock(socket->lock); - - ret = ask_channel_creation(ua_sess, ua_chan, consumer, socket); - if (ret < 0) { - goto error; - } - -error: - pthread_mutex_unlock(socket->lock); - return ret; -} - -/* - * Send a get channel command to consumer using the given channel key. The - * channel object is populated and the stream list. - * - * Return 0 on success else a negative value. - */ -int ust_consumer_get_channel(struct consumer_socket *socket, - struct ust_app_channel *ua_chan) -{ - int ret; - struct lttcomm_consumer_msg msg; - - assert(ua_chan); - assert(socket); - assert(socket->fd >= 0); - - msg.cmd_type = LTTNG_CONSUMER_GET_CHANNEL; - msg.u.get_channel.key = ua_chan->key; - - pthread_mutex_lock(socket->lock); - health_code_update(); - - /* Send command and wait for OK reply. */ - ret = consumer_send_msg(socket, &msg); - if (ret < 0) { - goto error; - } - - /* First, get the channel from consumer. */ - ret = ustctl_recv_channel_from_consumer(socket->fd, &ua_chan->obj); - if (ret < 0) { - if (ret != -EPIPE) { - ERR("Error recv channel from consumer %d with ret %d", - socket->fd, ret); - } else { - DBG3("UST app recv channel from consumer. Consumer is dead."); - } - goto error; - } - - /* Next, get all streams. */ - while (1) { - struct ust_app_stream *stream; - - /* Create UST stream */ - stream = ust_app_alloc_stream(); - if (stream == NULL) { - ret = -ENOMEM; - goto error; - } - - /* Stream object is populated by this call if successful. */ - ret = ustctl_recv_stream_from_consumer(socket->fd, &stream->obj); - if (ret < 0) { - free(stream); - if (ret == -LTTNG_UST_ERR_NOENT) { - DBG3("UST app consumer has no more stream available"); - ret = 0; - break; - } - if (ret != -EPIPE) { - ERR("Recv stream from consumer %d with ret %d", - socket->fd, ret); - } else { - DBG3("UST app recv stream from consumer. Consumer is dead."); - } - goto error; - } - - /* Order is important this is why a list is used. */ - cds_list_add_tail(&stream->list, &ua_chan->streams.head); - ua_chan->streams.count++; - - DBG2("UST app stream %d received succesfully", ua_chan->streams.count); - } - - /* This MUST match or else we have a synchronization problem. */ - assert(ua_chan->expected_stream_count == ua_chan->streams.count); - - /* Wait for confirmation that we can proceed with the streams. */ - ret = consumer_recv_status_reply(socket); - if (ret < 0) { - goto error; - } - -error: - health_code_update(); - pthread_mutex_unlock(socket->lock); - return ret; -} - -/* - * Send a destroy channel command to consumer using the given channel key. - * - * Note that this command MUST be used prior to a successful - * LTTNG_CONSUMER_GET_CHANNEL because once this command is done successfully, - * the streams are dispatched to the consumer threads and MUST be teardown - * through the hang up process. - * - * Return 0 on success else a negative value. - */ -int ust_consumer_destroy_channel(struct consumer_socket *socket, - struct ust_app_channel *ua_chan) -{ - int ret; - struct lttcomm_consumer_msg msg; - - assert(ua_chan); - assert(socket); - assert(socket->fd >= 0); - - msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL; - msg.u.destroy_channel.key = ua_chan->key; - - pthread_mutex_lock(socket->lock); - health_code_update(); - - ret = consumer_send_msg(socket, &msg); - if (ret < 0) { - goto error; - } - -error: - health_code_update(); - pthread_mutex_unlock(socket->lock); - return ret; -} - -/* - * Send a given stream to UST tracer. - * - * On success return 0 else a negative value. - */ -int ust_consumer_send_stream_to_ust(struct ust_app *app, - struct ust_app_channel *channel, struct ust_app_stream *stream) -{ - int ret; - - assert(app); - assert(stream); - assert(channel); - - DBG2("UST consumer send stream to app %d", app->sock); - - /* Relay stream to application. */ - ret = ustctl_send_stream_to_ust(app->sock, channel->obj, stream->obj); - if (ret < 0) { - if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { - ERR("Error ustctl send stream %s to app pid: %d with ret %d", - stream->name, app->pid, ret); - } else { - DBG3("UST app send stream to ust failed. Application is dead."); - } - goto error; - } - channel->handle = channel->obj->handle; - -error: - return ret; -} - -/* - * Send channel previously received from the consumer to the UST tracer. - * - * On success return 0 else a negative value. - */ -int ust_consumer_send_channel_to_ust(struct ust_app *app, - struct ust_app_session *ua_sess, struct ust_app_channel *channel) -{ - int ret; - - assert(app); - assert(ua_sess); - assert(channel); - assert(channel->obj); - - DBG2("UST app send channel to app sock %d pid %d (name: %s, key: %lu)", - app->sock, app->pid, channel->name, channel->key); - - /* Send stream to application. */ - ret = ustctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj); - if (ret < 0) { - if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { - ERR("Error ustctl send channel %s to app pid: %d with ret %d", - channel->name, app->pid, ret); - } else { - DBG3("UST app send channel to ust failed. Application is dead."); - } - goto error; - } - -error: - return ret; -} - -/* - * Send metadata string to consumer. - * - * Return 0 on success else a negative value. - */ -int ust_consumer_push_metadata(struct consumer_socket *socket, - struct ust_app_session *ua_sess, char *metadata_str, - size_t len, size_t target_offset) -{ - int ret; - struct lttcomm_consumer_msg msg; - - assert(socket); - assert(socket->fd >= 0); - assert(ua_sess); - assert(ua_sess->metadata); - - DBG2("UST consumer push metadata to consumer socket %d", socket->fd); - - msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA; - msg.u.push_metadata.key = ua_sess->metadata->key; - msg.u.push_metadata.target_offset = target_offset; - msg.u.push_metadata.len = len; - - /* - * TODO: reenable these locks when the consumerd gets the ability to - * reorder the metadata it receives. This fits with locking in - * src/bin/lttng-sessiond/ust-app.c:push_metadata() - * - * pthread_mutex_lock(socket->lock); - */ - - health_code_update(); - ret = consumer_send_msg(socket, &msg); - if (ret < 0) { - goto error; - } - - DBG3("UST consumer push metadata on sock %d of len %lu", socket->fd, len); - - ret = lttcomm_send_unix_sock(socket->fd, metadata_str, len); - if (ret < 0) { - fprintf(stderr, "send error: %d\n", ret); - goto error; - } - - health_code_update(); - ret = consumer_recv_status_reply(socket); - if (ret < 0) { - goto error; - } - -error: - health_code_update(); - /* - * pthread_mutex_unlock(socket->lock); - */ - return ret; -} - -/* - * Send a close metdata command to consumer using the given channel key. - * - * Return 0 on success else a negative value. - */ -int ust_consumer_close_metadata(struct consumer_socket *socket, - struct ust_app_channel *ua_chan) -{ - int ret; - struct lttcomm_consumer_msg msg; - - assert(ua_chan); - assert(socket); - assert(socket->fd >= 0); - - DBG2("UST consumer close metadata channel key %lu", ua_chan->key); - - msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA; - msg.u.close_metadata.key = ua_chan->key; - - pthread_mutex_lock(socket->lock); - health_code_update(); - - ret = consumer_send_msg(socket, &msg); - if (ret < 0) { - goto error; - } - -error: - health_code_update(); - pthread_mutex_unlock(socket->lock); - return ret; -} - -/* - * Send a setup metdata command to consumer using the given channel key. - * - * Return 0 on success else a negative value. - */ -int ust_consumer_setup_metadata(struct consumer_socket *socket, - struct ust_app_channel *ua_chan) -{ - int ret; - struct lttcomm_consumer_msg msg; - - assert(ua_chan); - assert(socket); - assert(socket->fd >= 0); - - DBG2("UST consumer setup metadata channel key %lu", ua_chan->key); - - msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA; - msg.u.setup_metadata.key = ua_chan->key; - - pthread_mutex_lock(socket->lock); - health_code_update(); - - ret = consumer_send_msg(socket, &msg); - if (ret < 0) { - goto error; - } - -error: - health_code_update(); - pthread_mutex_unlock(socket->lock); - return ret; -}