+++ /dev/null
-/*
- * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include <common/common.h>
-#include <common/defaults.h>
-#include <common/compat/string.h>
-
-#include "consumer.h"
-#include "health-sessiond.h"
-#include "kernel-consumer.h"
-#include "notification-thread-commands.h"
-#include "session.h"
-#include "lttng-sessiond.h"
-
-static char *create_channel_path(struct consumer_output *consumer,
- size_t *consumer_path_offset)
-{
- int ret;
- char tmp_path[PATH_MAX];
- char *pathname = NULL;
-
- LTTNG_ASSERT(consumer);
-
- /* Get the right path name destination */
- if (consumer->type == CONSUMER_DST_LOCAL ||
- (consumer->type == CONSUMER_DST_NET &&
- consumer->relay_major_version == 2 &&
- consumer->relay_minor_version >= 11)) {
- pathname = strdup(consumer->domain_subdir);
- if (!pathname) {
- PERROR("Failed to copy domain subdirectory string %s",
- consumer->domain_subdir);
- goto error;
- }
- *consumer_path_offset = strlen(consumer->domain_subdir);
- DBG3("Kernel local consumer trace path relative to current trace chunk: \"%s\"",
- pathname);
- } else {
- /* Network output, relayd < 2.11. */
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s",
- consumer->dst.net.base_dir,
- consumer->domain_subdir);
- if (ret < 0) {
- PERROR("snprintf kernel metadata path");
- goto error;
- } else if (ret >= sizeof(tmp_path)) {
- ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s\"",
- sizeof(tmp_path), ret,
- consumer->dst.net.base_dir,
- consumer->domain_subdir);
- goto error;
- }
- pathname = lttng_strndup(tmp_path, sizeof(tmp_path));
- if (!pathname) {
- PERROR("lttng_strndup");
- goto error;
- }
- *consumer_path_offset = 0;
- DBG3("Kernel network consumer subdir path: %s", pathname);
- }
-
- return pathname;
-
-error:
- free(pathname);
- return NULL;
-}
-
-/*
- * Sending a single channel to the consumer with command ADD_CHANNEL.
- */
-static
-int kernel_consumer_add_channel(struct consumer_socket *sock,
- struct ltt_kernel_channel *channel,
- struct ltt_kernel_session *ksession,
- unsigned int monitor)
-{
- int ret;
- char *pathname = NULL;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
- enum lttng_error_code status;
- struct ltt_session *session = NULL;
- struct lttng_channel_extended *channel_attr_extended;
- bool is_local_trace;
- size_t consumer_path_offset = 0;
-
- /* Safety net */
- LTTNG_ASSERT(channel);
- LTTNG_ASSERT(ksession);
- LTTNG_ASSERT(ksession->consumer);
-
- consumer = ksession->consumer;
- channel_attr_extended = (struct lttng_channel_extended *)
- channel->channel->attr.extended.ptr;
-
- DBG("Kernel consumer adding channel %s to kernel consumer",
- channel->channel->name);
- is_local_trace = consumer->net_seq_index == -1ULL;
-
- pathname = create_channel_path(consumer, &consumer_path_offset);
- if (!pathname) {
- ret = -1;
- goto error;
- }
-
- if (is_local_trace && ksession->current_trace_chunk) {
- enum lttng_trace_chunk_status chunk_status;
- char *pathname_index;
-
- ret = asprintf(&pathname_index, "%s/" DEFAULT_INDEX_DIR,
- pathname);
- if (ret < 0) {
- ERR("Failed to format channel index directory");
- ret = -1;
- goto error;
- }
-
- /*
- * Create the index subdirectory which will take care
- * of implicitly creating the channel's path.
- */
- chunk_status = lttng_trace_chunk_create_subdirectory(
- ksession->current_trace_chunk, pathname_index);
- free(pathname_index);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- ret = -1;
- goto error;
- }
- }
-
- /* Prep channel message structure */
- consumer_init_add_channel_comm_msg(&lkm,
- channel->key,
- ksession->id,
- &pathname[consumer_path_offset],
- ksession->uid,
- ksession->gid,
- consumer->net_seq_index,
- channel->channel->name,
- channel->stream_count,
- channel->channel->attr.output,
- CONSUMER_CHANNEL_TYPE_DATA,
- channel->channel->attr.tracefile_size,
- channel->channel->attr.tracefile_count,
- monitor,
- channel->channel->attr.live_timer_interval,
- ksession->is_live_session,
- channel_attr_extended->monitor_timer_interval,
- ksession->current_trace_chunk);
-
- health_code_update();
-
- ret = consumer_send_channel(sock, &lkm);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update();
- rcu_read_lock();
- session = session_find_by_id(ksession->id);
- LTTNG_ASSERT(session);
- LTTNG_ASSERT(pthread_mutex_trylock(&session->lock));
- LTTNG_ASSERT(session_trylock_list());
-
- status = notification_thread_command_add_channel(
- the_notification_thread_handle, session->name,
- ksession->uid, ksession->gid, channel->channel->name,
- channel->key, LTTNG_DOMAIN_KERNEL,
- channel->channel->attr.subbuf_size *
- channel->channel->attr.num_subbuf);
- rcu_read_unlock();
- if (status != LTTNG_OK) {
- ret = -1;
- goto error;
- }
-
- channel->published_to_notification_thread = true;
-
-error:
- if (session) {
- session_put(session);
- }
- free(pathname);
- return ret;
-}
-
-/*
- * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
- *
- * The consumer socket lock must be held by the caller.
- */
-int kernel_consumer_add_metadata(struct consumer_socket *sock,
- struct ltt_kernel_session *ksession, unsigned int monitor)
-{
- int ret;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
-
- rcu_read_lock();
-
- /* Safety net */
- LTTNG_ASSERT(ksession);
- LTTNG_ASSERT(ksession->consumer);
- LTTNG_ASSERT(sock);
-
- DBG("Sending metadata %d to kernel consumer",
- ksession->metadata_stream_fd);
-
- /* Get consumer output pointer */
- consumer = ksession->consumer;
-
- /* Prep channel message structure */
- consumer_init_add_channel_comm_msg(&lkm,
- ksession->metadata->key,
- ksession->id,
- "",
- ksession->uid,
- ksession->gid,
- consumer->net_seq_index,
- ksession->metadata->conf->name,
- 1,
- ksession->metadata->conf->attr.output,
- CONSUMER_CHANNEL_TYPE_METADATA,
- ksession->metadata->conf->attr.tracefile_size,
- ksession->metadata->conf->attr.tracefile_count,
- monitor,
- ksession->metadata->conf->attr.live_timer_interval,
- ksession->is_live_session,
- 0,
- ksession->current_trace_chunk);
-
- health_code_update();
-
- ret = consumer_send_channel(sock, &lkm);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update();
-
- /* Prep stream message structure */
- consumer_init_add_stream_comm_msg(&lkm,
- ksession->metadata->key,
- ksession->metadata_stream_fd,
- 0 /* CPU: 0 for metadata. */);
-
- health_code_update();
-
- /* Send stream and file descriptor */
- ret = consumer_send_stream(sock, consumer, &lkm,
- &ksession->metadata_stream_fd, 1);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update();
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Sending a single stream to the consumer with command ADD_STREAM.
- */
-static
-int kernel_consumer_add_stream(struct consumer_socket *sock,
- struct ltt_kernel_channel *channel,
- struct ltt_kernel_stream *stream,
- struct ltt_kernel_session *session, unsigned int monitor)
-{
- int ret;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
-
- LTTNG_ASSERT(channel);
- LTTNG_ASSERT(stream);
- LTTNG_ASSERT(session);
- LTTNG_ASSERT(session->consumer);
- LTTNG_ASSERT(sock);
-
- DBG("Sending stream %d of channel %s to kernel consumer",
- stream->fd, channel->channel->name);
-
- /* Get consumer output pointer */
- consumer = session->consumer;
-
- /* Prep stream consumer message */
- consumer_init_add_stream_comm_msg(&lkm,
- channel->key,
- stream->fd,
- stream->cpu);
-
- health_code_update();
-
- /* Send stream and file descriptor */
- ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update();
-
-error:
- return ret;
-}
-
-/*
- * Sending the notification that all streams were sent with STREAMS_SENT.
- */
-int kernel_consumer_streams_sent(struct consumer_socket *sock,
- struct ltt_kernel_session *session, uint64_t channel_key)
-{
- int ret;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
-
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(session);
-
- DBG("Sending streams_sent");
- /* Get consumer output pointer */
- consumer = session->consumer;
-
- /* Prep stream consumer message */
- consumer_init_streams_sent_comm_msg(&lkm,
- LTTNG_CONSUMER_STREAMS_SENT,
- channel_key, consumer->net_seq_index);
-
- health_code_update();
-
- /* Send stream and file descriptor */
- ret = consumer_send_msg(sock, &lkm);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of kernel channel to the consumer.
- *
- * The consumer socket lock must be held by the caller.
- */
-int kernel_consumer_send_channel_streams(struct consumer_socket *sock,
- struct ltt_kernel_channel *channel, struct ltt_kernel_session *ksession,
- unsigned int monitor)
-{
- int ret = LTTNG_OK;
- struct ltt_kernel_stream *stream;
-
- /* Safety net */
- LTTNG_ASSERT(channel);
- LTTNG_ASSERT(ksession);
- LTTNG_ASSERT(ksession->consumer);
- LTTNG_ASSERT(sock);
-
- rcu_read_lock();
-
- /* Bail out if consumer is disabled */
- if (!ksession->consumer->enabled) {
- ret = LTTNG_OK;
- goto error;
- }
-
- DBG("Sending streams of channel %s to kernel consumer",
- channel->channel->name);
-
- if (!channel->sent_to_consumer) {
- ret = kernel_consumer_add_channel(sock, channel, ksession, monitor);
- if (ret < 0) {
- goto error;
- }
- channel->sent_to_consumer = true;
- }
-
- /* Send streams */
- cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
- if (!stream->fd || stream->sent_to_consumer) {
- continue;
- }
-
- /* Add stream on the kernel consumer side. */
- ret = kernel_consumer_add_stream(sock, channel, stream,
- ksession, monitor);
- if (ret < 0) {
- goto error;
- }
- stream->sent_to_consumer = true;
- }
-
-error:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Send all stream fds of the kernel session to the consumer.
- *
- * The consumer socket lock must be held by the caller.
- */
-int kernel_consumer_send_session(struct consumer_socket *sock,
- struct ltt_kernel_session *session)
-{
- int ret, monitor = 0;
- struct ltt_kernel_channel *chan;
-
- /* Safety net */
- LTTNG_ASSERT(session);
- LTTNG_ASSERT(session->consumer);
- LTTNG_ASSERT(sock);
-
- /* Bail out if consumer is disabled */
- if (!session->consumer->enabled) {
- ret = LTTNG_OK;
- goto error;
- }
-
- /* Don't monitor the streams on the consumer if in flight recorder. */
- if (session->output_traces) {
- monitor = 1;
- }
-
- DBG("Sending session stream to kernel consumer");
-
- if (session->metadata_stream_fd >= 0 && session->metadata) {
- ret = kernel_consumer_add_metadata(sock, session, monitor);
- if (ret < 0) {
- goto error;
- }
- }
-
- /* Send channel and streams of it */
- cds_list_for_each_entry(chan, &session->channel_list.head, list) {
- ret = kernel_consumer_send_channel_streams(sock, chan, session,
- monitor);
- if (ret < 0) {
- goto error;
- }
- if (monitor) {
- /*
- * Inform the relay that all the streams for the
- * channel were sent.
- */
- ret = kernel_consumer_streams_sent(sock, session, chan->key);
- if (ret < 0) {
- goto error;
- }
- }
- }
-
- DBG("Kernel consumer FDs of metadata and channel streams sent");
-
- session->consumer_fds_sent = 1;
- return 0;
-
-error:
- return ret;
-}
-
-int kernel_consumer_destroy_channel(struct consumer_socket *socket,
- struct ltt_kernel_channel *channel)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(channel);
- LTTNG_ASSERT(socket);
-
- DBG("Sending kernel consumer destroy channel key %" PRIu64, channel->key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
- msg.u.destroy_channel.key = channel->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;
-}
-
-int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
- struct ltt_kernel_metadata *metadata)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(metadata);
- LTTNG_ASSERT(socket);
-
- DBG("Sending kernel consumer destroy channel key %" PRIu64, metadata->key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
- msg.u.destroy_channel.key = metadata->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;
-}
projects / lttng-tools.git / blobdiff