X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel-consumer.c;fp=src%2Fbin%2Flttng-sessiond%2Fkernel-consumer.c;h=0000000000000000000000000000000000000000;hp=364705fcb31d7f91e5d095d0740b38488c0bd712;hb=7966af5763c4aaca39df9bbfa9277ff15715c720;hpb=3a5f70173aa04d11ccb22694d5d31a702cad33ab

diff --git a/src/bin/lttng-sessiond/kernel-consumer.c b/src/bin/lttng-sessiond/kernel-consumer.c
deleted file mode 100644
index 364705fcb..000000000
--- a/src/bin/lttng-sessiond/kernel-consumer.c
+++ /dev/null
@@ -1,531 +0,0 @@
-/*
- * 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;
-}